add mp3 import and playback support

3 files changed, 3366 insertions, 0 deletions

diff --git a/thirdparty/minimp3/LICENSE b/thirdparty/minimp3/LICENSE
new file mode 100644
index 0000000000..2c4afabdb6
--- /dev/null
+++ b/thirdparty/minimp3/LICENSE
@@ -0,0 +1,117 @@
+CC0 1.0 Universal
+
+Statement of Purpose
+
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+exclusive Copyright and Related Rights (defined below) upon the creator and
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diff --git a/thirdparty/minimp3/minimp3.h b/thirdparty/minimp3/minimp3.h
new file mode 100644
index 0000000000..796cbc1f8e
--- /dev/null
+++ b/thirdparty/minimp3/minimp3.h
@@ -0,0 +1,1855 @@
+#ifndef MINIMP3_H
+#define MINIMP3_H
+/*
+    https://github.com/lieff/minimp3
+    To the extent possible under law, the author(s) have dedicated all copyright and related and neighboring rights to this software to the public domain worldwide.
+    This software is distributed without any warranty.
+    See <http://creativecommons.org/publicdomain/zero/1.0/>.
+*/
+#include <stdint.h>
+
+#define MINIMP3_MAX_SAMPLES_PER_FRAME (1152*2)
+
+typedef struct
+{
+    int frame_bytes, frame_offset, channels, hz, layer, bitrate_kbps;
+} mp3dec_frame_info_t;
+
+typedef struct
+{
+    float mdct_overlap[2][9*32], qmf_state[15*2*32];
+    int reserv, free_format_bytes;
+    unsigned char header[4], reserv_buf[511];
+} mp3dec_t;
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+void mp3dec_init(mp3dec_t *dec);
+#ifndef MINIMP3_FLOAT_OUTPUT
+typedef int16_t mp3d_sample_t;
+#else /* MINIMP3_FLOAT_OUTPUT */
+typedef float mp3d_sample_t;
+void mp3dec_f32_to_s16(const float *in, int16_t *out, int num_samples);
+#endif /* MINIMP3_FLOAT_OUTPUT */
+int mp3dec_decode_frame(mp3dec_t *dec, const uint8_t *mp3, int mp3_bytes, mp3d_sample_t *pcm, mp3dec_frame_info_t *info);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* MINIMP3_H */
+#if defined(MINIMP3_IMPLEMENTATION) && !defined(_MINIMP3_IMPLEMENTATION_GUARD)
+#define _MINIMP3_IMPLEMENTATION_GUARD
+
+#include <stdlib.h>
+#include <string.h>
+
+#define MAX_FREE_FORMAT_FRAME_SIZE  2304    /* more than ISO spec's */
+#ifndef MAX_FRAME_SYNC_MATCHES
+#define MAX_FRAME_SYNC_MATCHES      10
+#endif /* MAX_FRAME_SYNC_MATCHES */
+
+#define MAX_L3_FRAME_PAYLOAD_BYTES  MAX_FREE_FORMAT_FRAME_SIZE /* MUST be >= 320000/8/32000*1152 = 1440 */
+
+#define MAX_BITRESERVOIR_BYTES      511
+#define SHORT_BLOCK_TYPE            2
+#define STOP_BLOCK_TYPE             3
+#define MODE_MONO                   3
+#define MODE_JOINT_STEREO           1
+#define HDR_SIZE                    4
+#define HDR_IS_MONO(h)              (((h[3]) & 0xC0) == 0xC0)
+#define HDR_IS_MS_STEREO(h)         (((h[3]) & 0xE0) == 0x60)
+#define HDR_IS_FREE_FORMAT(h)       (((h[2]) & 0xF0) == 0)
+#define HDR_IS_CRC(h)               (!((h[1]) & 1))
+#define HDR_TEST_PADDING(h)         ((h[2]) & 0x2)
+#define HDR_TEST_MPEG1(h)           ((h[1]) & 0x8)
+#define HDR_TEST_NOT_MPEG25(h)      ((h[1]) & 0x10)
+#define HDR_TEST_I_STEREO(h)        ((h[3]) & 0x10)
+#define HDR_TEST_MS_STEREO(h)       ((h[3]) & 0x20)
+#define HDR_GET_STEREO_MODE(h)      (((h[3]) >> 6) & 3)
+#define HDR_GET_STEREO_MODE_EXT(h)  (((h[3]) >> 4) & 3)
+#define HDR_GET_LAYER(h)            (((h[1]) >> 1) & 3)
+#define HDR_GET_BITRATE(h)          ((h[2]) >> 4)
+#define HDR_GET_SAMPLE_RATE(h)      (((h[2]) >> 2) & 3)
+#define HDR_GET_MY_SAMPLE_RATE(h)   (HDR_GET_SAMPLE_RATE(h) + (((h[1] >> 3) & 1) + ((h[1] >> 4) & 1))*3)
+#define HDR_IS_FRAME_576(h)         ((h[1] & 14) == 2)
+#define HDR_IS_LAYER_1(h)           ((h[1] & 6) == 6)
+
+#define BITS_DEQUANTIZER_OUT        -1
+#define MAX_SCF                     (255 + BITS_DEQUANTIZER_OUT*4 - 210)
+#define MAX_SCFI                    ((MAX_SCF + 3) & ~3)
+
+#define MINIMP3_MIN(a, b)           ((a) > (b) ? (b) : (a))
+#define MINIMP3_MAX(a, b)           ((a) < (b) ? (b) : (a))
+
+#if !defined(MINIMP3_NO_SIMD)
+
+#if !defined(MINIMP3_ONLY_SIMD) && (defined(_M_X64) || defined(__x86_64__) || defined(__aarch64__) || defined(_M_ARM64))
+/* x64 always have SSE2, arm64 always have neon, no need for generic code */
+#define MINIMP3_ONLY_SIMD
+#endif /* SIMD checks... */
+
+#if (defined(_MSC_VER) && (defined(_M_IX86) || defined(_M_X64))) || ((defined(__i386__) || defined(__x86_64__)) && defined(__SSE2__))
+#if defined(_MSC_VER)
+#include <intrin.h>
+#endif /* defined(_MSC_VER) */
+#include <immintrin.h>
+#define HAVE_SSE 1
+#define HAVE_SIMD 1
+#define VSTORE _mm_storeu_ps
+#define VLD _mm_loadu_ps
+#define VSET _mm_set1_ps
+#define VADD _mm_add_ps
+#define VSUB _mm_sub_ps
+#define VMUL _mm_mul_ps
+#define VMAC(a, x, y) _mm_add_ps(a, _mm_mul_ps(x, y))
+#define VMSB(a, x, y) _mm_sub_ps(a, _mm_mul_ps(x, y))
+#define VMUL_S(x, s)  _mm_mul_ps(x, _mm_set1_ps(s))
+#define VREV(x) _mm_shuffle_ps(x, x, _MM_SHUFFLE(0, 1, 2, 3))
+typedef __m128 f4;
+#if defined(_MSC_VER) || defined(MINIMP3_ONLY_SIMD)
+#define minimp3_cpuid __cpuid
+#else /* defined(_MSC_VER) || defined(MINIMP3_ONLY_SIMD) */
+static __inline__ __attribute__((always_inline)) void minimp3_cpuid(int CPUInfo[], const int InfoType)
+{
+#if defined(__PIC__)
+    __asm__ __volatile__(
+#if defined(__x86_64__)
+        "push %%rbx\n"
+        "cpuid\n"
+        "xchgl %%ebx, %1\n"
+        "pop  %%rbx\n"
+#else /* defined(__x86_64__) */
+        "xchgl %%ebx, %1\n"
+        "cpuid\n"
+        "xchgl %%ebx, %1\n"
+#endif /* defined(__x86_64__) */
+        : "=a" (CPUInfo[0]), "=r" (CPUInfo[1]), "=c" (CPUInfo[2]), "=d" (CPUInfo[3])
+        : "a" (InfoType));
+#else /* defined(__PIC__) */
+    __asm__ __volatile__(
+        "cpuid"
+        : "=a" (CPUInfo[0]), "=b" (CPUInfo[1]), "=c" (CPUInfo[2]), "=d" (CPUInfo[3])
+        : "a" (InfoType));
+#endif /* defined(__PIC__)*/
+}
+#endif /* defined(_MSC_VER) || defined(MINIMP3_ONLY_SIMD) */
+static int have_simd(void)
+{
+#ifdef MINIMP3_ONLY_SIMD
+    return 1;
+#else /* MINIMP3_ONLY_SIMD */
+    static int g_have_simd;
+    int CPUInfo[4];
+#ifdef MINIMP3_TEST
+    static int g_counter;
+    if (g_counter++ > 100)
+        return 0;
+#endif /* MINIMP3_TEST */
+    if (g_have_simd)
+        goto end;
+    minimp3_cpuid(CPUInfo, 0);
+    g_have_simd = 1;
+    if (CPUInfo[0] > 0)
+    {
+        minimp3_cpuid(CPUInfo, 1);
+        g_have_simd = (CPUInfo[3] & (1 << 26)) + 1; /* SSE2 */
+    }
+end:
+    return g_have_simd - 1;
+#endif /* MINIMP3_ONLY_SIMD */
+}
+#elif defined(__ARM_NEON) || defined(__aarch64__) || defined(_M_ARM64)
+#include <arm_neon.h>
+#define HAVE_SSE 0
+#define HAVE_SIMD 1
+#define VSTORE vst1q_f32
+#define VLD vld1q_f32
+#define VSET vmovq_n_f32
+#define VADD vaddq_f32
+#define VSUB vsubq_f32
+#define VMUL vmulq_f32
+#define VMAC(a, x, y) vmlaq_f32(a, x, y)
+#define VMSB(a, x, y) vmlsq_f32(a, x, y)
+#define VMUL_S(x, s)  vmulq_f32(x, vmovq_n_f32(s))
+#define VREV(x) vcombine_f32(vget_high_f32(vrev64q_f32(x)), vget_low_f32(vrev64q_f32(x)))
+typedef float32x4_t f4;
+static int have_simd()
+{   /* TODO: detect neon for !MINIMP3_ONLY_SIMD */
+    return 1;
+}
+#else /* SIMD checks... */
+#define HAVE_SSE 0
+#define HAVE_SIMD 0
+#ifdef MINIMP3_ONLY_SIMD
+#error MINIMP3_ONLY_SIMD used, but SSE/NEON not enabled
+#endif /* MINIMP3_ONLY_SIMD */
+#endif /* SIMD checks... */
+#else /* !defined(MINIMP3_NO_SIMD) */
+#define HAVE_SIMD 0
+#endif /* !defined(MINIMP3_NO_SIMD) */
+
+#if defined(__ARM_ARCH) && (__ARM_ARCH >= 6) && !defined(__aarch64__) && !defined(_M_ARM64)
+#define HAVE_ARMV6 1
+static __inline__ __attribute__((always_inline)) int32_t minimp3_clip_int16_arm(int32_t a)
+{
+    int32_t x = 0;
+    __asm__ ("ssat %0, #16, %1" : "=r"(x) : "r"(a));
+    return x;
+}
+#else
+#define HAVE_ARMV6 0
+#endif
+
+typedef struct
+{
+    const uint8_t *buf;
+    int pos, limit;
+} bs_t;
+
+typedef struct
+{
+    float scf[3*64];
+    uint8_t total_bands, stereo_bands, bitalloc[64], scfcod[64];
+} L12_scale_info;
+
+typedef struct
+{
+    uint8_t tab_offset, code_tab_width, band_count;
+} L12_subband_alloc_t;
+
+typedef struct
+{
+    const uint8_t *sfbtab;
+    uint16_t part_23_length, big_values, scalefac_compress;
+    uint8_t global_gain, block_type, mixed_block_flag, n_long_sfb, n_short_sfb;
+    uint8_t table_select[3], region_count[3], subblock_gain[3];
+    uint8_t preflag, scalefac_scale, count1_table, scfsi;
+} L3_gr_info_t;
+
+typedef struct
+{
+    bs_t bs;
+    uint8_t maindata[MAX_BITRESERVOIR_BYTES + MAX_L3_FRAME_PAYLOAD_BYTES];
+    L3_gr_info_t gr_info[4];
+    float grbuf[2][576], scf[40], syn[18 + 15][2*32];
+    uint8_t ist_pos[2][39];
+} mp3dec_scratch_t;
+
+static void bs_init(bs_t *bs, const uint8_t *data, int bytes)
+{
+    bs->buf   = data;
+    bs->pos   = 0;
+    bs->limit = bytes*8;
+}
+
+static uint32_t get_bits(bs_t *bs, int n)
+{
+    uint32_t next, cache = 0, s = bs->pos & 7;
+    int shl = n + s;
+    const uint8_t *p = bs->buf + (bs->pos >> 3);
+    if ((bs->pos += n) > bs->limit)
+        return 0;
+    next = *p++ & (255 >> s);
+    while ((shl -= 8) > 0)
+    {
+        cache |= next << shl;
+        next = *p++;
+    }
+    return cache | (next >> -shl);
+}
+
+static int hdr_valid(const uint8_t *h)
+{
+    return h[0] == 0xff &&
+        ((h[1] & 0xF0) == 0xf0 || (h[1] & 0xFE) == 0xe2) &&
+        (HDR_GET_LAYER(h) != 0) &&
+        (HDR_GET_BITRATE(h) != 15) &&
+        (HDR_GET_SAMPLE_RATE(h) != 3);
+}
+
+static int hdr_compare(const uint8_t *h1, const uint8_t *h2)
+{
+    return hdr_valid(h2) &&
+        ((h1[1] ^ h2[1]) & 0xFE) == 0 &&
+        ((h1[2] ^ h2[2]) & 0x0C) == 0 &&
+        !(HDR_IS_FREE_FORMAT(h1) ^ HDR_IS_FREE_FORMAT(h2));
+}
+
+static unsigned hdr_bitrate_kbps(const uint8_t *h)
+{
+    static const uint8_t halfrate[2][3][15] = {
+        { { 0,4,8,12,16,20,24,28,32,40,48,56,64,72,80 }, { 0,4,8,12,16,20,24,28,32,40,48,56,64,72,80 }, { 0,16,24,28,32,40,48,56,64,72,80,88,96,112,128 } },
+        { { 0,16,20,24,28,32,40,48,56,64,80,96,112,128,160 }, { 0,16,24,28,32,40,48,56,64,80,96,112,128,160,192 }, { 0,16,32,48,64,80,96,112,128,144,160,176,192,208,224 } },
+    };
+    return 2*halfrate[!!HDR_TEST_MPEG1(h)][HDR_GET_LAYER(h) - 1][HDR_GET_BITRATE(h)];
+}
+
+static unsigned hdr_sample_rate_hz(const uint8_t *h)
+{
+    static const unsigned g_hz[3] = { 44100, 48000, 32000 };
+    return g_hz[HDR_GET_SAMPLE_RATE(h)] >> (int)!HDR_TEST_MPEG1(h) >> (int)!HDR_TEST_NOT_MPEG25(h);
+}
+
+static unsigned hdr_frame_samples(const uint8_t *h)
+{
+    return HDR_IS_LAYER_1(h) ? 384 : (1152 >> (int)HDR_IS_FRAME_576(h));
+}
+
+static int hdr_frame_bytes(const uint8_t *h, int free_format_size)
+{
+    int frame_bytes = hdr_frame_samples(h)*hdr_bitrate_kbps(h)*125/hdr_sample_rate_hz(h);
+    if (HDR_IS_LAYER_1(h))
+    {
+        frame_bytes &= ~3; /* slot align */
+    }
+    return frame_bytes ? frame_bytes : free_format_size;
+}
+
+static int hdr_padding(const uint8_t *h)
+{
+    return HDR_TEST_PADDING(h) ? (HDR_IS_LAYER_1(h) ? 4 : 1) : 0;
+}
+
+#ifndef MINIMP3_ONLY_MP3
+static const L12_subband_alloc_t *L12_subband_alloc_table(const uint8_t *hdr, L12_scale_info *sci)
+{
+    const L12_subband_alloc_t *alloc;
+    int mode = HDR_GET_STEREO_MODE(hdr);
+    int nbands, stereo_bands = (mode == MODE_MONO) ? 0 : (mode == MODE_JOINT_STEREO) ? (HDR_GET_STEREO_MODE_EXT(hdr) << 2) + 4 : 32;
+
+    if (HDR_IS_LAYER_1(hdr))
+    {
+        static const L12_subband_alloc_t g_alloc_L1[] = { { 76, 4, 32 } };
+        alloc = g_alloc_L1;
+        nbands = 32;
+    } else if (!HDR_TEST_MPEG1(hdr))
+    {
+        static const L12_subband_alloc_t g_alloc_L2M2[] = { { 60, 4, 4 }, { 44, 3, 7 }, { 44, 2, 19 } };
+        alloc = g_alloc_L2M2;
+        nbands = 30;
+    } else
+    {
+        static const L12_subband_alloc_t g_alloc_L2M1[] = { { 0, 4, 3 }, { 16, 4, 8 }, { 32, 3, 12 }, { 40, 2, 7 } };
+        int sample_rate_idx = HDR_GET_SAMPLE_RATE(hdr);
+        unsigned kbps = hdr_bitrate_kbps(hdr) >> (int)(mode != MODE_MONO);
+        if (!kbps) /* free-format */
+        {
+            kbps = 192;
+        }
+
+        alloc = g_alloc_L2M1;
+        nbands = 27;
+        if (kbps < 56)
+        {
+            static const L12_subband_alloc_t g_alloc_L2M1_lowrate[] = { { 44, 4, 2 }, { 44, 3, 10 } };
+            alloc = g_alloc_L2M1_lowrate;
+            nbands = sample_rate_idx == 2 ? 12 : 8;
+        } else if (kbps >= 96 && sample_rate_idx != 1)
+        {
+            nbands = 30;
+        }
+    }
+
+    sci->total_bands = (uint8_t)nbands;
+    sci->stereo_bands = (uint8_t)MINIMP3_MIN(stereo_bands, nbands);
+
+    return alloc;
+}
+
+static void L12_read_scalefactors(bs_t *bs, uint8_t *pba, uint8_t *scfcod, int bands, float *scf)
+{
+    static const float g_deq_L12[18*3] = {
+#define DQ(x) 9.53674316e-07f/x, 7.56931807e-07f/x, 6.00777173e-07f/x
+        DQ(3),DQ(7),DQ(15),DQ(31),DQ(63),DQ(127),DQ(255),DQ(511),DQ(1023),DQ(2047),DQ(4095),DQ(8191),DQ(16383),DQ(32767),DQ(65535),DQ(3),DQ(5),DQ(9)
+    };
+    int i, m;
+    for (i = 0; i < bands; i++)
+    {
+        float s = 0;
+        int ba = *pba++;
+        int mask = ba ? 4 + ((19 >> scfcod[i]) & 3) : 0;
+        for (m = 4; m; m >>= 1)
+        {
+            if (mask & m)
+            {
+                int b = get_bits(bs, 6);
+                s = g_deq_L12[ba*3 - 6 + b % 3]*(1 << 21 >> b/3);
+            }
+            *scf++ = s;
+        }
+    }
+}
+
+static void L12_read_scale_info(const uint8_t *hdr, bs_t *bs, L12_scale_info *sci)
+{
+    static const uint8_t g_bitalloc_code_tab[] = {
+        0,17, 3, 4, 5,6,7, 8,9,10,11,12,13,14,15,16,
+        0,17,18, 3,19,4,5, 6,7, 8, 9,10,11,12,13,16,
+        0,17,18, 3,19,4,5,16,
+        0,17,18,16,
+        0,17,18,19, 4,5,6, 7,8, 9,10,11,12,13,14,15,
+        0,17,18, 3,19,4,5, 6,7, 8, 9,10,11,12,13,14,
+        0, 2, 3, 4, 5,6,7, 8,9,10,11,12,13,14,15,16
+    };
+    const L12_subband_alloc_t *subband_alloc = L12_subband_alloc_table(hdr, sci);
+
+    int i, k = 0, ba_bits = 0;
+    const uint8_t *ba_code_tab = g_bitalloc_code_tab;
+
+    for (i = 0; i < sci->total_bands; i++)
+    {
+        uint8_t ba;
+        if (i == k)
+        {
+            k += subband_alloc->band_count;
+            ba_bits = subband_alloc->code_tab_width;
+            ba_code_tab = g_bitalloc_code_tab + subband_alloc->tab_offset;
+            subband_alloc++;
+        }
+        ba = ba_code_tab[get_bits(bs, ba_bits)];
+        sci->bitalloc[2*i] = ba;
+        if (i < sci->stereo_bands)
+        {
+            ba = ba_code_tab[get_bits(bs, ba_bits)];
+        }
+        sci->bitalloc[2*i + 1] = sci->stereo_bands ? ba : 0;
+    }
+
+    for (i = 0; i < 2*sci->total_bands; i++)
+    {
+        sci->scfcod[i] = sci->bitalloc[i] ? HDR_IS_LAYER_1(hdr) ? 2 : get_bits(bs, 2) : 6;
+    }
+
+    L12_read_scalefactors(bs, sci->bitalloc, sci->scfcod, sci->total_bands*2, sci->scf);
+
+    for (i = sci->stereo_bands; i < sci->total_bands; i++)
+    {
+        sci->bitalloc[2*i + 1] = 0;
+    }
+}
+
+static int L12_dequantize_granule(float *grbuf, bs_t *bs, L12_scale_info *sci, int group_size)
+{
+    int i, j, k, choff = 576;
+    for (j = 0; j < 4; j++)
+    {
+        float *dst = grbuf + group_size*j;
+        for (i = 0; i < 2*sci->total_bands; i++)
+        {
+            int ba = sci->bitalloc[i];
+            if (ba != 0)
+            {
+                if (ba < 17)
+                {
+                    int half = (1 << (ba - 1)) - 1;
+                    for (k = 0; k < group_size; k++)
+                    {
+                        dst[k] = (float)((int)get_bits(bs, ba) - half);
+                    }
+                } else
+                {
+                    unsigned mod = (2 << (ba - 17)) + 1;    /* 3, 5, 9 */
+                    unsigned code = get_bits(bs, mod + 2 - (mod >> 3));  /* 5, 7, 10 */
+                    for (k = 0; k < group_size; k++, code /= mod)
+                    {
+                        dst[k] = (float)((int)(code % mod - mod/2));
+                    }
+                }
+            }
+            dst += choff;
+            choff = 18 - choff;
+        }
+    }
+    return group_size*4;
+}
+
+static void L12_apply_scf_384(L12_scale_info *sci, const float *scf, float *dst)
+{
+    int i, k;
+    memcpy(dst + 576 + sci->stereo_bands*18, dst + sci->stereo_bands*18, (sci->total_bands - sci->stereo_bands)*18*sizeof(float));
+    for (i = 0; i < sci->total_bands; i++, dst += 18, scf += 6)
+    {
+        for (k = 0; k < 12; k++)
+        {
+            dst[k + 0]   *= scf[0];
+            dst[k + 576] *= scf[3];
+        }
+    }
+}
+#endif /* MINIMP3_ONLY_MP3 */
+
+static int L3_read_side_info(bs_t *bs, L3_gr_info_t *gr, const uint8_t *hdr)
+{
+    static const uint8_t g_scf_long[8][23] = {
+        { 6,6,6,6,6,6,8,10,12,14,16,20,24,28,32,38,46,52,60,68,58,54,0 },
+        { 12,12,12,12,12,12,16,20,24,28,32,40,48,56,64,76,90,2,2,2,2,2,0 },
+        { 6,6,6,6,6,6,8,10,12,14,16,20,24,28,32,38,46,52,60,68,58,54,0 },
+        { 6,6,6,6,6,6,8,10,12,14,16,18,22,26,32,38,46,54,62,70,76,36,0 },
+        { 6,6,6,6,6,6,8,10,12,14,16,20,24,28,32,38,46,52,60,68,58,54,0 },
+        { 4,4,4,4,4,4,6,6,8,8,10,12,16,20,24,28,34,42,50,54,76,158,0 },
+        { 4,4,4,4,4,4,6,6,6,8,10,12,16,18,22,28,34,40,46,54,54,192,0 },
+        { 4,4,4,4,4,4,6,6,8,10,12,16,20,24,30,38,46,56,68,84,102,26,0 }
+    };
+    static const uint8_t g_scf_short[8][40] = {
+        { 4,4,4,4,4,4,4,4,4,6,6,6,8,8,8,10,10,10,12,12,12,14,14,14,18,18,18,24,24,24,30,30,30,40,40,40,18,18,18,0 },
+        { 8,8,8,8,8,8,8,8,8,12,12,12,16,16,16,20,20,20,24,24,24,28,28,28,36,36,36,2,2,2,2,2,2,2,2,2,26,26,26,0 },
+        { 4,4,4,4,4,4,4,4,4,6,6,6,6,6,6,8,8,8,10,10,10,14,14,14,18,18,18,26,26,26,32,32,32,42,42,42,18,18,18,0 },
+        { 4,4,4,4,4,4,4,4,4,6,6,6,8,8,8,10,10,10,12,12,12,14,14,14,18,18,18,24,24,24,32,32,32,44,44,44,12,12,12,0 },
+        { 4,4,4,4,4,4,4,4,4,6,6,6,8,8,8,10,10,10,12,12,12,14,14,14,18,18,18,24,24,24,30,30,30,40,40,40,18,18,18,0 },
+        { 4,4,4,4,4,4,4,4,4,4,4,4,6,6,6,8,8,8,10,10,10,12,12,12,14,14,14,18,18,18,22,22,22,30,30,30,56,56,56,0 },
+        { 4,4,4,4,4,4,4,4,4,4,4,4,6,6,6,6,6,6,10,10,10,12,12,12,14,14,14,16,16,16,20,20,20,26,26,26,66,66,66,0 },
+        { 4,4,4,4,4,4,4,4,4,4,4,4,6,6,6,8,8,8,12,12,12,16,16,16,20,20,20,26,26,26,34,34,34,42,42,42,12,12,12,0 }
+    };
+    static const uint8_t g_scf_mixed[8][40] = {
+        { 6,6,6,6,6,6,6,6,6,8,8,8,10,10,10,12,12,12,14,14,14,18,18,18,24,24,24,30,30,30,40,40,40,18,18,18,0 },
+        { 12,12,12,4,4,4,8,8,8,12,12,12,16,16,16,20,20,20,24,24,24,28,28,28,36,36,36,2,2,2,2,2,2,2,2,2,26,26,26,0 },
+        { 6,6,6,6,6,6,6,6,6,6,6,6,8,8,8,10,10,10,14,14,14,18,18,18,26,26,26,32,32,32,42,42,42,18,18,18,0 },
+        { 6,6,6,6,6,6,6,6,6,8,8,8,10,10,10,12,12,12,14,14,14,18,18,18,24,24,24,32,32,32,44,44,44,12,12,12,0 },
+        { 6,6,6,6,6,6,6,6,6,8,8,8,10,10,10,12,12,12,14,14,14,18,18,18,24,24,24,30,30,30,40,40,40,18,18,18,0 },
+        { 4,4,4,4,4,4,6,6,4,4,4,6,6,6,8,8,8,10,10,10,12,12,12,14,14,14,18,18,18,22,22,22,30,30,30,56,56,56,0 },
+        { 4,4,4,4,4,4,6,6,4,4,4,6,6,6,6,6,6,10,10,10,12,12,12,14,14,14,16,16,16,20,20,20,26,26,26,66,66,66,0 },
+        { 4,4,4,4,4,4,6,6,4,4,4,6,6,6,8,8,8,12,12,12,16,16,16,20,20,20,26,26,26,34,34,34,42,42,42,12,12,12,0 }
+    };
+
+    unsigned tables, scfsi = 0;
+    int main_data_begin, part_23_sum = 0;
+    int sr_idx = HDR_GET_MY_SAMPLE_RATE(hdr); sr_idx -= (sr_idx != 0);
+    int gr_count = HDR_IS_MONO(hdr) ? 1 : 2;
+
+    if (HDR_TEST_MPEG1(hdr))
+    {
+        gr_count *= 2;
+        main_data_begin = get_bits(bs, 9);
+        scfsi = get_bits(bs, 7 + gr_count);
+    } else
+    {
+        main_data_begin = get_bits(bs, 8 + gr_count) >> gr_count;
+    }
+
+    do
+    {
+        if (HDR_IS_MONO(hdr))
+        {
+            scfsi <<= 4;
+        }
+        gr->part_23_length = (uint16_t)get_bits(bs, 12);
+        part_23_sum += gr->part_23_length;
+        gr->big_values = (uint16_t)get_bits(bs,  9);
+        if (gr->big_values > 288)
+        {
+            return -1;
+        }
+        gr->global_gain = (uint8_t)get_bits(bs, 8);
+        gr->scalefac_compress = (uint16_t)get_bits(bs, HDR_TEST_MPEG1(hdr) ? 4 : 9);
+        gr->sfbtab = g_scf_long[sr_idx];
+        gr->n_long_sfb  = 22;
+        gr->n_short_sfb = 0;
+        if (get_bits(bs, 1))
+        {
+            gr->block_type = (uint8_t)get_bits(bs, 2);
+            if (!gr->block_type)
+            {
+                return -1;
+            }
+            gr->mixed_block_flag = (uint8_t)get_bits(bs, 1);
+            gr->region_count[0] = 7;
+            gr->region_count[1] = 255;
+            if (gr->block_type == SHORT_BLOCK_TYPE)
+            {
+                scfsi &= 0x0F0F;
+                if (!gr->mixed_block_flag)
+                {
+                    gr->region_count[0] = 8;
+                    gr->sfbtab = g_scf_short[sr_idx];
+                    gr->n_long_sfb = 0;
+                    gr->n_short_sfb = 39;
+                } else
+                {
+                    gr->sfbtab = g_scf_mixed[sr_idx];
+                    gr->n_long_sfb = HDR_TEST_MPEG1(hdr) ? 8 : 6;
+                    gr->n_short_sfb = 30;
+                }
+            }
+            tables = get_bits(bs, 10);
+            tables <<= 5;
+            gr->subblock_gain[0] = (uint8_t)get_bits(bs, 3);
+            gr->subblock_gain[1] = (uint8_t)get_bits(bs, 3);
+            gr->subblock_gain[2] = (uint8_t)get_bits(bs, 3);
+        } else
+        {
+            gr->block_type = 0;
+            gr->mixed_block_flag = 0;
+            tables = get_bits(bs, 15);
+            gr->region_count[0] = (uint8_t)get_bits(bs, 4);
+            gr->region_count[1] = (uint8_t)get_bits(bs, 3);
+            gr->region_count[2] = 255;
+        }
+        gr->table_select[0] = (uint8_t)(tables >> 10);
+        gr->table_select[1] = (uint8_t)((tables >> 5) & 31);
+        gr->table_select[2] = (uint8_t)((tables) & 31);
+        gr->preflag = HDR_TEST_MPEG1(hdr) ? get_bits(bs, 1) : (gr->scalefac_compress >= 500);
+        gr->scalefac_scale = (uint8_t)get_bits(bs, 1);
+        gr->count1_table = (uint8_t)get_bits(bs, 1);
+        gr->scfsi = (uint8_t)((scfsi >> 12) & 15);
+        scfsi <<= 4;
+        gr++;
+    } while(--gr_count);
+
+    if (part_23_sum + bs->pos > bs->limit + main_data_begin*8)
+    {
+        return -1;
+    }
+
+    return main_data_begin;
+}
+
+static void L3_read_scalefactors(uint8_t *scf, uint8_t *ist_pos, const uint8_t *scf_size, const uint8_t *scf_count, bs_t *bitbuf, int scfsi)
+{
+    int i, k;
+    for (i = 0; i < 4 && scf_count[i]; i++, scfsi *= 2)
+    {
+        int cnt = scf_count[i];
+        if (scfsi & 8)
+        {
+            memcpy(scf, ist_pos, cnt);
+        } else
+        {
+            int bits = scf_size[i];
+            if (!bits)
+            {
+                memset(scf, 0, cnt);
+                memset(ist_pos, 0, cnt);
+            } else
+            {
+                int max_scf = (scfsi < 0) ? (1 << bits) - 1 : -1;
+                for (k = 0; k < cnt; k++)
+                {
+                    int s = get_bits(bitbuf, bits);
+                    ist_pos[k] = (s == max_scf ? -1 : s);
+                    scf[k] = s;
+                }
+            }
+        }
+        ist_pos += cnt;
+        scf += cnt;
+    }
+    scf[0] = scf[1] = scf[2] = 0;
+}
+
+static float L3_ldexp_q2(float y, int exp_q2)
+{
+    static const float g_expfrac[4] = { 9.31322575e-10f,7.83145814e-10f,6.58544508e-10f,5.53767716e-10f };
+    int e;
+    do
+    {
+        e = MINIMP3_MIN(30*4, exp_q2);
+        y *= g_expfrac[e & 3]*(1 << 30 >> (e >> 2));
+    } while ((exp_q2 -= e) > 0);
+    return y;
+}
+
+static void L3_decode_scalefactors(const uint8_t *hdr, uint8_t *ist_pos, bs_t *bs, const L3_gr_info_t *gr, float *scf, int ch)
+{
+    static const uint8_t g_scf_partitions[3][28] = {
+        { 6,5,5, 5,6,5,5,5,6,5, 7,3,11,10,0,0, 7, 7, 7,0, 6, 6,6,3, 8, 8,5,0 },
+        { 8,9,6,12,6,9,9,9,6,9,12,6,15,18,0,0, 6,15,12,0, 6,12,9,6, 6,18,9,0 },
+        { 9,9,6,12,9,9,9,9,9,9,12,6,18,18,0,0,12,12,12,0,12, 9,9,6,15,12,9,0 }
+    };
+    const uint8_t *scf_partition = g_scf_partitions[!!gr->n_short_sfb + !gr->n_long_sfb];
+    uint8_t scf_size[4], iscf[40];
+    int i, scf_shift = gr->scalefac_scale + 1, gain_exp, scfsi = gr->scfsi;
+    float gain;
+
+    if (HDR_TEST_MPEG1(hdr))
+    {
+        static const uint8_t g_scfc_decode[16] = { 0,1,2,3, 12,5,6,7, 9,10,11,13, 14,15,18,19 };
+        int part = g_scfc_decode[gr->scalefac_compress];
+        scf_size[1] = scf_size[0] = (uint8_t)(part >> 2);
+        scf_size[3] = scf_size[2] = (uint8_t)(part & 3);
+    } else
+    {
+        static const uint8_t g_mod[6*4] = { 5,5,4,4,5,5,4,1,4,3,1,1,5,6,6,1,4,4,4,1,4,3,1,1 };
+        int k, modprod, sfc, ist = HDR_TEST_I_STEREO(hdr) && ch;
+        sfc = gr->scalefac_compress >> ist;
+        for (k = ist*3*4; sfc >= 0; sfc -= modprod, k += 4)
+        {
+            for (modprod = 1, i = 3; i >= 0; i--)
+            {
+                scf_size[i] = (uint8_t)(sfc / modprod % g_mod[k + i]);
+                modprod *= g_mod[k + i];
+            }
+        }
+        scf_partition += k;
+        scfsi = -16;
+    }
+    L3_read_scalefactors(iscf, ist_pos, scf_size, scf_partition, bs, scfsi);
+
+    if (gr->n_short_sfb)
+    {
+        int sh = 3 - scf_shift;
+        for (i = 0; i < gr->n_short_sfb; i += 3)
+        {
+            iscf[gr->n_long_sfb + i + 0] += gr->subblock_gain[0] << sh;
+            iscf[gr->n_long_sfb + i + 1] += gr->subblock_gain[1] << sh;
+            iscf[gr->n_long_sfb + i + 2] += gr->subblock_gain[2] << sh;
+        }
+    } else if (gr->preflag)
+    {
+        static const uint8_t g_preamp[10] = { 1,1,1,1,2,2,3,3,3,2 };
+        for (i = 0; i < 10; i++)
+        {
+            iscf[11 + i] += g_preamp[i];
+        }
+    }
+
+    gain_exp = gr->global_gain + BITS_DEQUANTIZER_OUT*4 - 210 - (HDR_IS_MS_STEREO(hdr) ? 2 : 0);
+    gain = L3_ldexp_q2(1 << (MAX_SCFI/4),  MAX_SCFI - gain_exp);
+    for (i = 0; i < (int)(gr->n_long_sfb + gr->n_short_sfb); i++)
+    {
+        scf[i] = L3_ldexp_q2(gain, iscf[i] << scf_shift);
+    }
+}
+
+static const float g_pow43[129 + 16] = {
+    0,-1,-2.519842f,-4.326749f,-6.349604f,-8.549880f,-10.902724f,-13.390518f,-16.000000f,-18.720754f,-21.544347f,-24.463781f,-27.473142f,-30.567351f,-33.741992f,-36.993181f,
+    0,1,2.519842f,4.326749f,6.349604f,8.549880f,10.902724f,13.390518f,16.000000f,18.720754f,21.544347f,24.463781f,27.473142f,30.567351f,33.741992f,36.993181f,40.317474f,43.711787f,47.173345f,50.699631f,54.288352f,57.937408f,61.644865f,65.408941f,69.227979f,73.100443f,77.024898f,81.000000f,85.024491f,89.097188f,93.216975f,97.382800f,101.593667f,105.848633f,110.146801f,114.487321f,118.869381f,123.292209f,127.755065f,132.257246f,136.798076f,141.376907f,145.993119f,150.646117f,155.335327f,160.060199f,164.820202f,169.614826f,174.443577f,179.305980f,184.201575f,189.129918f,194.090580f,199.083145f,204.107210f,209.162385f,214.248292f,219.364564f,224.510845f,229.686789f,234.892058f,240.126328f,245.389280f,250.680604f,256.000000f,261.347174f,266.721841f,272.123723f,277.552547f,283.008049f,288.489971f,293.998060f,299.532071f,305.091761f,310.676898f,316.287249f,321.922592f,327.582707f,333.267377f,338.976394f,344.709550f,350.466646f,356.247482f,362.051866f,367.879608f,373.730522f,379.604427f,385.501143f,391.420496f,397.362314f,403.326427f,409.312672f,415.320884f,421.350905f,427.402579f,433.475750f,439.570269f,445.685987f,451.822757f,457.980436f,464.158883f,470.357960f,476.577530f,482.817459f,489.077615f,495.357868f,501.658090f,507.978156f,514.317941f,520.677324f,527.056184f,533.454404f,539.871867f,546.308458f,552.764065f,559.238575f,565.731879f,572.243870f,578.774440f,585.323483f,591.890898f,598.476581f,605.080431f,611.702349f,618.342238f,625.000000f,631.675540f,638.368763f,645.079578f
+};
+
+static float L3_pow_43(int x)
+{
+    float frac;
+    int sign, mult = 256;
+
+    if (x < 129)
+    {
+        return g_pow43[16 + x];
+    }
+
+    if (x < 1024)
+    {
+        mult = 16;
+        x <<= 3;
+    }
+
+    sign = 2*x & 64;
+    frac = (float)((x & 63) - sign) / ((x & ~63) + sign);
+    return g_pow43[16 + ((x + sign) >> 6)]*(1.f + frac*((4.f/3) + frac*(2.f/9)))*mult;
+}
+
+static void L3_huffman(float *dst, bs_t *bs, const L3_gr_info_t *gr_info, const float *scf, int layer3gr_limit)
+{
+    static const int16_t tabs[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+        785,785,785,785,784,784,784,784,513,513,513,513,513,513,513,513,256,256,256,256,256,256,256,256,256,256,256,256,256,256,256,256,
+        -255,1313,1298,1282,785,785,785,785,784,784,784,784,769,769,769,769,256,256,256,256,256,256,256,256,256,256,256,256,256,256,256,256,290,288,
+        -255,1313,1298,1282,769,769,769,769,529,529,529,529,529,529,529,529,528,528,528,528,528,528,528,528,512,512,512,512,512,512,512,512,290,288,
+        -253,-318,-351,-367,785,785,785,785,784,784,784,784,769,769,769,769,256,256,256,256,256,256,256,256,256,256,256,256,256,256,256,256,819,818,547,547,275,275,275,275,561,560,515,546,289,274,288,258,
+        -254,-287,1329,1299,1314,1312,1057,1057,1042,1042,1026,1026,784,784,784,784,529,529,529,529,529,529,529,529,769,769,769,769,768,768,768,768,563,560,306,306,291,259,
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+        -251,-525,-605,-685,-765,-831,-846,1298,1057,1057,1312,1282,785,785,785,785,784,784,784,784,769,769,769,769,512,512,512,512,512,512,512,512,1399,1398,1383,1367,1382,1396,1351,-511,1381,1366,1139,1139,1079,1079,1124,1124,1364,1349,1363,1333,882,882,882,882,807,807,807,807,1094,1094,1136,1136,373,341,535,535,881,775,867,822,774,-591,324,338,-671,849,550,550,866,864,609,609,293,336,534,534,789,835,773,-751,834,804,308,307,833,788,832,772,562,562,547,547,305,275,560,515,290,290,
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+    static const uint8_t tab32[] = { 130,162,193,209,44,28,76,140,9,9,9,9,9,9,9,9,190,254,222,238,126,94,157,157,109,61,173,205 };
+    static const uint8_t tab33[] = { 252,236,220,204,188,172,156,140,124,108,92,76,60,44,28,12 };
+    static const int16_t tabindex[2*16] = { 0,32,64,98,0,132,180,218,292,364,426,538,648,746,0,1126,1460,1460,1460,1460,1460,1460,1460,1460,1842,1842,1842,1842,1842,1842,1842,1842 };
+    static const uint8_t g_linbits[] =  { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,2,3,4,6,8,10,13,4,5,6,7,8,9,11,13 };
+
+#define PEEK_BITS(n)  (bs_cache >> (32 - n))
+#define FLUSH_BITS(n) { bs_cache <<= (n); bs_sh += (n); }
+#define CHECK_BITS    while (bs_sh >= 0) { bs_cache |= (uint32_t)*bs_next_ptr++ << bs_sh; bs_sh -= 8; }
+#define BSPOS         ((bs_next_ptr - bs->buf)*8 - 24 + bs_sh)
+
+    float one = 0.0f;
+    int ireg = 0, big_val_cnt = gr_info->big_values;
+    const uint8_t *sfb = gr_info->sfbtab;
+    const uint8_t *bs_next_ptr = bs->buf + bs->pos/8;
+    uint32_t bs_cache = (((bs_next_ptr[0]*256u + bs_next_ptr[1])*256u + bs_next_ptr[2])*256u + bs_next_ptr[3]) << (bs->pos & 7);
+    int pairs_to_decode, np, bs_sh = (bs->pos & 7) - 8;
+    bs_next_ptr += 4;
+
+    while (big_val_cnt > 0)
+    {
+        int tab_num = gr_info->table_select[ireg];
+        int sfb_cnt = gr_info->region_count[ireg++];
+        const int16_t *codebook = tabs + tabindex[tab_num];
+        int linbits = g_linbits[tab_num];
+        if (linbits)
+        {
+            do
+            {
+                np = *sfb++ / 2;
+                pairs_to_decode = MINIMP3_MIN(big_val_cnt, np);
+                one = *scf++;
+                do
+                {
+                    int j, w = 5;
+                    int leaf = codebook[PEEK_BITS(w)];
+                    while (leaf < 0)
+                    {
+                        FLUSH_BITS(w);
+                        w = leaf & 7;
+                        leaf = codebook[PEEK_BITS(w) - (leaf >> 3)];
+                    }
+                    FLUSH_BITS(leaf >> 8);
+
+                    for (j = 0; j < 2; j++, dst++, leaf >>= 4)
+                    {
+                        int lsb = leaf & 0x0F;
+                        if (lsb == 15)
+                        {
+                            lsb += PEEK_BITS(linbits);
+                            FLUSH_BITS(linbits);
+                            CHECK_BITS;
+                            *dst = one*L3_pow_43(lsb)*((int32_t)bs_cache < 0 ? -1: 1);
+                        } else
+                        {
+                            *dst = g_pow43[16 + lsb - 16*(bs_cache >> 31)]*one;
+                        }
+                        FLUSH_BITS(lsb ? 1 : 0);
+                    }
+                    CHECK_BITS;
+                } while (--pairs_to_decode);
+            } while ((big_val_cnt -= np) > 0 && --sfb_cnt >= 0);
+        } else
+        {
+            do
+            {
+                np = *sfb++ / 2;
+                pairs_to_decode = MINIMP3_MIN(big_val_cnt, np);
+                one = *scf++;
+                do
+                {
+                    int j, w = 5;
+                    int leaf = codebook[PEEK_BITS(w)];
+                    while (leaf < 0)
+                    {
+                        FLUSH_BITS(w);
+                        w = leaf & 7;
+                        leaf = codebook[PEEK_BITS(w) - (leaf >> 3)];
+                    }
+                    FLUSH_BITS(leaf >> 8);
+
+                    for (j = 0; j < 2; j++, dst++, leaf >>= 4)
+                    {
+                        int lsb = leaf & 0x0F;
+                        *dst = g_pow43[16 + lsb - 16*(bs_cache >> 31)]*one;
+                        FLUSH_BITS(lsb ? 1 : 0);
+                    }
+                    CHECK_BITS;
+                } while (--pairs_to_decode);
+            } while ((big_val_cnt -= np) > 0 && --sfb_cnt >= 0);
+        }
+    }
+
+    for (np = 1 - big_val_cnt;; dst += 4)
+    {
+        const uint8_t *codebook_count1 = (gr_info->count1_table) ? tab33 : tab32;
+        int leaf = codebook_count1[PEEK_BITS(4)];
+        if (!(leaf & 8))
+        {
+            leaf = codebook_count1[(leaf >> 3) + (bs_cache << 4 >> (32 - (leaf & 3)))];
+        }
+        FLUSH_BITS(leaf & 7);
+        if (BSPOS > layer3gr_limit)
+        {
+            break;
+        }
+#define RELOAD_SCALEFACTOR  if (!--np) { np = *sfb++/2; if (!np) break; one = *scf++; }
+#define DEQ_COUNT1(s) if (leaf & (128 >> s)) { dst[s] = ((int32_t)bs_cache < 0) ? -one : one; FLUSH_BITS(1) }
+        RELOAD_SCALEFACTOR;
+        DEQ_COUNT1(0);
+        DEQ_COUNT1(1);
+        RELOAD_SCALEFACTOR;
+        DEQ_COUNT1(2);
+        DEQ_COUNT1(3);
+        CHECK_BITS;
+    }
+
+    bs->pos = layer3gr_limit;
+}
+
+static void L3_midside_stereo(float *left, int n)
+{
+    int i = 0;
+    float *right = left + 576;
+#if HAVE_SIMD
+    if (have_simd()) for (; i < n - 3; i += 4)
+    {
+        f4 vl = VLD(left + i);
+        f4 vr = VLD(right + i);
+        VSTORE(left + i, VADD(vl, vr));
+        VSTORE(right + i, VSUB(vl, vr));
+    }
+#endif /* HAVE_SIMD */
+    for (; i < n; i++)
+    {
+        float a = left[i];
+        float b = right[i];
+        left[i] = a + b;
+        right[i] = a - b;
+    }
+}
+
+static void L3_intensity_stereo_band(float *left, int n, float kl, float kr)
+{
+    int i;
+    for (i = 0; i < n; i++)
+    {
+        left[i + 576] = left[i]*kr;
+        left[i] = left[i]*kl;
+    }
+}
+
+static void L3_stereo_top_band(const float *right, const uint8_t *sfb, int nbands, int max_band[3])
+{
+    int i, k;
+
+    max_band[0] = max_band[1] = max_band[2] = -1;
+
+    for (i = 0; i < nbands; i++)
+    {
+        for (k = 0; k < sfb[i]; k += 2)
+        {
+            if (right[k] != 0 || right[k + 1] != 0)
+            {
+                max_band[i % 3] = i;
+                break;
+            }
+        }
+        right += sfb[i];
+    }
+}
+
+static void L3_stereo_process(float *left, const uint8_t *ist_pos, const uint8_t *sfb, const uint8_t *hdr, int max_band[3], int mpeg2_sh)
+{
+    static const float g_pan[7*2] = { 0,1,0.21132487f,0.78867513f,0.36602540f,0.63397460f,0.5f,0.5f,0.63397460f,0.36602540f,0.78867513f,0.21132487f,1,0 };
+    unsigned i, max_pos = HDR_TEST_MPEG1(hdr) ? 7 : 64;
+
+    for (i = 0; sfb[i]; i++)
+    {
+        unsigned ipos = ist_pos[i];
+        if ((int)i > max_band[i % 3] && ipos < max_pos)
+        {
+            float kl, kr, s = HDR_TEST_MS_STEREO(hdr) ? 1.41421356f : 1;
+            if (HDR_TEST_MPEG1(hdr))
+            {
+                kl = g_pan[2*ipos];
+                kr = g_pan[2*ipos + 1];
+            } else
+            {
+                kl = 1;
+                kr = L3_ldexp_q2(1, (ipos + 1) >> 1 << mpeg2_sh);
+                if (ipos & 1)
+                {
+                    kl = kr;
+                    kr = 1;
+                }
+            }
+            L3_intensity_stereo_band(left, sfb[i], kl*s, kr*s);
+        } else if (HDR_TEST_MS_STEREO(hdr))
+        {
+            L3_midside_stereo(left, sfb[i]);
+        }
+        left += sfb[i];
+    }
+}
+
+static void L3_intensity_stereo(float *left, uint8_t *ist_pos, const L3_gr_info_t *gr, const uint8_t *hdr)
+{
+    int max_band[3], n_sfb = gr->n_long_sfb + gr->n_short_sfb;
+    int i, max_blocks = gr->n_short_sfb ? 3 : 1;
+
+    L3_stereo_top_band(left + 576, gr->sfbtab, n_sfb, max_band);
+    if (gr->n_long_sfb)
+    {
+        max_band[0] = max_band[1] = max_band[2] = MINIMP3_MAX(MINIMP3_MAX(max_band[0], max_band[1]), max_band[2]);
+    }
+    for (i = 0; i < max_blocks; i++)
+    {
+        int default_pos = HDR_TEST_MPEG1(hdr) ? 3 : 0;
+        int itop = n_sfb - max_blocks + i;
+        int prev = itop - max_blocks;
+        ist_pos[itop] = max_band[i] >= prev ? default_pos : ist_pos[prev];
+    }
+    L3_stereo_process(left, ist_pos, gr->sfbtab, hdr, max_band, gr[1].scalefac_compress & 1);
+}
+
+static void L3_reorder(float *grbuf, float *scratch, const uint8_t *sfb)
+{
+    int i, len;
+    float *src = grbuf, *dst = scratch;
+
+    for (;0 != (len = *sfb); sfb += 3, src += 2*len)
+    {
+        for (i = 0; i < len; i++, src++)
+        {
+            *dst++ = src[0*len];
+            *dst++ = src[1*len];
+            *dst++ = src[2*len];
+        }
+    }
+    memcpy(grbuf, scratch, (dst - scratch)*sizeof(float));
+}
+
+static void L3_antialias(float *grbuf, int nbands)
+{
+    static const float g_aa[2][8] = {
+        {0.85749293f,0.88174200f,0.94962865f,0.98331459f,0.99551782f,0.99916056f,0.99989920f,0.99999316f},
+        {0.51449576f,0.47173197f,0.31337745f,0.18191320f,0.09457419f,0.04096558f,0.01419856f,0.00369997f}
+    };
+
+    for (; nbands > 0; nbands--, grbuf += 18)
+    {
+        int i = 0;
+#if HAVE_SIMD
+        if (have_simd()) for (; i < 8; i += 4)
+        {
+            f4 vu = VLD(grbuf + 18 + i);
+            f4 vd = VLD(grbuf + 14 - i);
+            f4 vc0 = VLD(g_aa[0] + i);
+            f4 vc1 = VLD(g_aa[1] + i);
+            vd = VREV(vd);
+            VSTORE(grbuf + 18 + i, VSUB(VMUL(vu, vc0), VMUL(vd, vc1)));
+            vd = VADD(VMUL(vu, vc1), VMUL(vd, vc0));
+            VSTORE(grbuf + 14 - i, VREV(vd));
+        }
+#endif /* HAVE_SIMD */
+#ifndef MINIMP3_ONLY_SIMD
+        for(; i < 8; i++)
+        {
+            float u = grbuf[18 + i];
+            float d = grbuf[17 - i];
+            grbuf[18 + i] = u*g_aa[0][i] - d*g_aa[1][i];
+            grbuf[17 - i] = u*g_aa[1][i] + d*g_aa[0][i];
+        }
+#endif /* MINIMP3_ONLY_SIMD */
+    }
+}
+
+static void L3_dct3_9(float *y)
+{
+    float s0, s1, s2, s3, s4, s5, s6, s7, s8, t0, t2, t4;
+
+    s0 = y[0]; s2 = y[2]; s4 = y[4]; s6 = y[6]; s8 = y[8];
+    t0 = s0 + s6*0.5f;
+    s0 -= s6;
+    t4 = (s4 + s2)*0.93969262f;
+    t2 = (s8 + s2)*0.76604444f;
+    s6 = (s4 - s8)*0.17364818f;
+    s4 += s8 - s2;
+
+    s2 = s0 - s4*0.5f;
+    y[4] = s4 + s0;
+    s8 = t0 - t2 + s6;
+    s0 = t0 - t4 + t2;
+    s4 = t0 + t4 - s6;
+
+    s1 = y[1]; s3 = y[3]; s5 = y[5]; s7 = y[7];
+
+    s3 *= 0.86602540f;
+    t0 = (s5 + s1)*0.98480775f;
+    t4 = (s5 - s7)*0.34202014f;
+    t2 = (s1 + s7)*0.64278761f;
+    s1 = (s1 - s5 - s7)*0.86602540f;
+
+    s5 = t0 - s3 - t2;
+    s7 = t4 - s3 - t0;
+    s3 = t4 + s3 - t2;
+
+    y[0] = s4 - s7;
+    y[1] = s2 + s1;
+    y[2] = s0 - s3;
+    y[3] = s8 + s5;
+    y[5] = s8 - s5;
+    y[6] = s0 + s3;
+    y[7] = s2 - s1;
+    y[8] = s4 + s7;
+}
+
+static void L3_imdct36(float *grbuf, float *overlap, const float *window, int nbands)
+{
+    int i, j;
+    static const float g_twid9[18] = {
+        0.73727734f,0.79335334f,0.84339145f,0.88701083f,0.92387953f,0.95371695f,0.97629601f,0.99144486f,0.99904822f,0.67559021f,0.60876143f,0.53729961f,0.46174861f,0.38268343f,0.30070580f,0.21643961f,0.13052619f,0.04361938f
+    };
+
+    for (j = 0; j < nbands; j++, grbuf += 18, overlap += 9)
+    {
+        float co[9], si[9];
+        co[0] = -grbuf[0];
+        si[0] = grbuf[17];
+        for (i = 0; i < 4; i++)
+        {
+            si[8 - 2*i] =   grbuf[4*i + 1] - grbuf[4*i + 2];
+            co[1 + 2*i] =   grbuf[4*i + 1] + grbuf[4*i + 2];
+            si[7 - 2*i] =   grbuf[4*i + 4] - grbuf[4*i + 3];
+            co[2 + 2*i] = -(grbuf[4*i + 3] + grbuf[4*i + 4]);
+        }
+        L3_dct3_9(co);
+        L3_dct3_9(si);
+
+        si[1] = -si[1];
+        si[3] = -si[3];
+        si[5] = -si[5];
+        si[7] = -si[7];
+
+        i = 0;
+
+#if HAVE_SIMD
+        if (have_simd()) for (; i < 8; i += 4)
+        {
+            f4 vovl = VLD(overlap + i);
+            f4 vc = VLD(co + i);
+            f4 vs = VLD(si + i);
+            f4 vr0 = VLD(g_twid9 + i);
+            f4 vr1 = VLD(g_twid9 + 9 + i);
+            f4 vw0 = VLD(window + i);
+            f4 vw1 = VLD(window + 9 + i);
+            f4 vsum = VADD(VMUL(vc, vr1), VMUL(vs, vr0));
+            VSTORE(overlap + i, VSUB(VMUL(vc, vr0), VMUL(vs, vr1)));
+            VSTORE(grbuf + i, VSUB(VMUL(vovl, vw0), VMUL(vsum, vw1)));
+            vsum = VADD(VMUL(vovl, vw1), VMUL(vsum, vw0));
+            VSTORE(grbuf + 14 - i, VREV(vsum));
+        }
+#endif /* HAVE_SIMD */
+        for (; i < 9; i++)
+        {
+            float ovl  = overlap[i];
+            float sum  = co[i]*g_twid9[9 + i] + si[i]*g_twid9[0 + i];
+            overlap[i] = co[i]*g_twid9[0 + i] - si[i]*g_twid9[9 + i];
+            grbuf[i]      = ovl*window[0 + i] - sum*window[9 + i];
+            grbuf[17 - i] = ovl*window[9 + i] + sum*window[0 + i];
+        }
+    }
+}
+
+static void L3_idct3(float x0, float x1, float x2, float *dst)
+{
+    float m1 = x1*0.86602540f;
+    float a1 = x0 - x2*0.5f;
+    dst[1] = x0 + x2;
+    dst[0] = a1 + m1;
+    dst[2] = a1 - m1;
+}
+
+static void L3_imdct12(float *x, float *dst, float *overlap)
+{
+    static const float g_twid3[6] = { 0.79335334f,0.92387953f,0.99144486f, 0.60876143f,0.38268343f,0.13052619f };
+    float co[3], si[3];
+    int i;
+
+    L3_idct3(-x[0], x[6] + x[3], x[12] + x[9], co);
+    L3_idct3(x[15], x[12] - x[9], x[6] - x[3], si);
+    si[1] = -si[1];
+
+    for (i = 0; i < 3; i++)
+    {
+        float ovl  = overlap[i];
+        float sum  = co[i]*g_twid3[3 + i] + si[i]*g_twid3[0 + i];
+        overlap[i] = co[i]*g_twid3[0 + i] - si[i]*g_twid3[3 + i];
+        dst[i]     = ovl*g_twid3[2 - i] - sum*g_twid3[5 - i];
+        dst[5 - i] = ovl*g_twid3[5 - i] + sum*g_twid3[2 - i];
+    }
+}
+
+static void L3_imdct_short(float *grbuf, float *overlap, int nbands)
+{
+    for (;nbands > 0; nbands--, overlap += 9, grbuf += 18)
+    {
+        float tmp[18];
+        memcpy(tmp, grbuf, sizeof(tmp));
+        memcpy(grbuf, overlap, 6*sizeof(float));
+        L3_imdct12(tmp, grbuf + 6, overlap + 6);
+        L3_imdct12(tmp + 1, grbuf + 12, overlap + 6);
+        L3_imdct12(tmp + 2, overlap, overlap + 6);
+    }
+}
+
+static void L3_change_sign(float *grbuf)
+{
+    int b, i;
+    for (b = 0, grbuf += 18; b < 32; b += 2, grbuf += 36)
+        for (i = 1; i < 18; i += 2)
+            grbuf[i] = -grbuf[i];
+}
+
+static void L3_imdct_gr(float *grbuf, float *overlap, unsigned block_type, unsigned n_long_bands)
+{
+    static const float g_mdct_window[2][18] = {
+        { 0.99904822f,0.99144486f,0.97629601f,0.95371695f,0.92387953f,0.88701083f,0.84339145f,0.79335334f,0.73727734f,0.04361938f,0.13052619f,0.21643961f,0.30070580f,0.38268343f,0.46174861f,0.53729961f,0.60876143f,0.67559021f },
+        { 1,1,1,1,1,1,0.99144486f,0.92387953f,0.79335334f,0,0,0,0,0,0,0.13052619f,0.38268343f,0.60876143f }
+    };
+    if (n_long_bands)
+    {
+        L3_imdct36(grbuf, overlap, g_mdct_window[0], n_long_bands);
+        grbuf += 18*n_long_bands;
+        overlap += 9*n_long_bands;
+    }
+    if (block_type == SHORT_BLOCK_TYPE)
+        L3_imdct_short(grbuf, overlap, 32 - n_long_bands);
+    else
+        L3_imdct36(grbuf, overlap, g_mdct_window[block_type == STOP_BLOCK_TYPE], 32 - n_long_bands);
+}
+
+static void L3_save_reservoir(mp3dec_t *h, mp3dec_scratch_t *s)
+{
+    int pos = (s->bs.pos + 7)/8u;
+    int remains = s->bs.limit/8u - pos;
+    if (remains > MAX_BITRESERVOIR_BYTES)
+    {
+        pos += remains - MAX_BITRESERVOIR_BYTES;
+        remains = MAX_BITRESERVOIR_BYTES;
+    }
+    if (remains > 0)
+    {
+        memmove(h->reserv_buf, s->maindata + pos, remains);
+    }
+    h->reserv = remains;
+}
+
+static int L3_restore_reservoir(mp3dec_t *h, bs_t *bs, mp3dec_scratch_t *s, int main_data_begin)
+{
+    int frame_bytes = (bs->limit - bs->pos)/8;
+    int bytes_have = MINIMP3_MIN(h->reserv, main_data_begin);
+    memcpy(s->maindata, h->reserv_buf + MINIMP3_MAX(0, h->reserv - main_data_begin), MINIMP3_MIN(h->reserv, main_data_begin));
+    memcpy(s->maindata + bytes_have, bs->buf + bs->pos/8, frame_bytes);
+    bs_init(&s->bs, s->maindata, bytes_have + frame_bytes);
+    return h->reserv >= main_data_begin;
+}
+
+static void L3_decode(mp3dec_t *h, mp3dec_scratch_t *s, L3_gr_info_t *gr_info, int nch)
+{
+    int ch;
+
+    for (ch = 0; ch < nch; ch++)
+    {
+        int layer3gr_limit = s->bs.pos + gr_info[ch].part_23_length;
+        L3_decode_scalefactors(h->header, s->ist_pos[ch], &s->bs, gr_info + ch, s->scf, ch);
+        L3_huffman(s->grbuf[ch], &s->bs, gr_info + ch, s->scf, layer3gr_limit);
+    }
+
+    if (HDR_TEST_I_STEREO(h->header))
+    {
+        L3_intensity_stereo(s->grbuf[0], s->ist_pos[1], gr_info, h->header);
+    } else if (HDR_IS_MS_STEREO(h->header))
+    {
+        L3_midside_stereo(s->grbuf[0], 576);
+    }
+
+    for (ch = 0; ch < nch; ch++, gr_info++)
+    {
+        int aa_bands = 31;
+        int n_long_bands = (gr_info->mixed_block_flag ? 2 : 0) << (int)(HDR_GET_MY_SAMPLE_RATE(h->header) == 2);
+
+        if (gr_info->n_short_sfb)
+        {
+            aa_bands = n_long_bands - 1;
+            L3_reorder(s->grbuf[ch] + n_long_bands*18, s->syn[0], gr_info->sfbtab + gr_info->n_long_sfb);
+        }
+
+        L3_antialias(s->grbuf[ch], aa_bands);
+        L3_imdct_gr(s->grbuf[ch], h->mdct_overlap[ch], gr_info->block_type, n_long_bands);
+        L3_change_sign(s->grbuf[ch]);
+    }
+}
+
+static void mp3d_DCT_II(float *grbuf, int n)
+{
+    static const float g_sec[24] = {
+        10.19000816f,0.50060302f,0.50241929f,3.40760851f,0.50547093f,0.52249861f,2.05778098f,0.51544732f,0.56694406f,1.48416460f,0.53104258f,0.64682180f,1.16943991f,0.55310392f,0.78815460f,0.97256821f,0.58293498f,1.06067765f,0.83934963f,0.62250412f,1.72244716f,0.74453628f,0.67480832f,5.10114861f
+    };
+    int i, k = 0;
+#if HAVE_SIMD
+    if (have_simd()) for (; k < n; k += 4)
+    {
+        f4 t[4][8], *x;
+        float *y = grbuf + k;
+
+        for (x = t[0], i = 0; i < 8; i++, x++)
+        {
+            f4 x0 = VLD(&y[i*18]);
+            f4 x1 = VLD(&y[(15 - i)*18]);
+            f4 x2 = VLD(&y[(16 + i)*18]);
+            f4 x3 = VLD(&y[(31 - i)*18]);
+            f4 t0 = VADD(x0, x3);
+            f4 t1 = VADD(x1, x2);
+            f4 t2 = VMUL_S(VSUB(x1, x2), g_sec[3*i + 0]);
+            f4 t3 = VMUL_S(VSUB(x0, x3), g_sec[3*i + 1]);
+            x[0] = VADD(t0, t1);
+            x[8] = VMUL_S(VSUB(t0, t1), g_sec[3*i + 2]);
+            x[16] = VADD(t3, t2);
+            x[24] = VMUL_S(VSUB(t3, t2), g_sec[3*i + 2]);
+        }
+        for (x = t[0], i = 0; i < 4; i++, x += 8)
+        {
+            f4 x0 = x[0], x1 = x[1], x2 = x[2], x3 = x[3], x4 = x[4], x5 = x[5], x6 = x[6], x7 = x[7], xt;
+            xt = VSUB(x0, x7); x0 = VADD(x0, x7);
+            x7 = VSUB(x1, x6); x1 = VADD(x1, x6);
+            x6 = VSUB(x2, x5); x2 = VADD(x2, x5);
+            x5 = VSUB(x3, x4); x3 = VADD(x3, x4);
+            x4 = VSUB(x0, x3); x0 = VADD(x0, x3);
+            x3 = VSUB(x1, x2); x1 = VADD(x1, x2);
+            x[0] = VADD(x0, x1);
+            x[4] = VMUL_S(VSUB(x0, x1), 0.70710677f);
+            x5 = VADD(x5, x6);
+            x6 = VMUL_S(VADD(x6, x7), 0.70710677f);
+            x7 = VADD(x7, xt);
+            x3 = VMUL_S(VADD(x3, x4), 0.70710677f);
+            x5 = VSUB(x5, VMUL_S(x7, 0.198912367f)); /* rotate by PI/8 */
+            x7 = VADD(x7, VMUL_S(x5, 0.382683432f));
+            x5 = VSUB(x5, VMUL_S(x7, 0.198912367f));
+            x0 = VSUB(xt, x6); xt = VADD(xt, x6);
+            x[1] = VMUL_S(VADD(xt, x7), 0.50979561f);
+            x[2] = VMUL_S(VADD(x4, x3), 0.54119611f);
+            x[3] = VMUL_S(VSUB(x0, x5), 0.60134488f);
+            x[5] = VMUL_S(VADD(x0, x5), 0.89997619f);
+            x[6] = VMUL_S(VSUB(x4, x3), 1.30656302f);
+            x[7] = VMUL_S(VSUB(xt, x7), 2.56291556f);
+        }
+
+        if (k > n - 3)
+        {
+#if HAVE_SSE
+#define VSAVE2(i, v) _mm_storel_pi((__m64 *)(void*)&y[i*18], v)
+#else /* HAVE_SSE */
+#define VSAVE2(i, v) vst1_f32((float32_t *)&y[i*18],  vget_low_f32(v))
+#endif /* HAVE_SSE */
+            for (i = 0; i < 7; i++, y += 4*18)
+            {
+                f4 s = VADD(t[3][i], t[3][i + 1]);
+                VSAVE2(0, t[0][i]);
+                VSAVE2(1, VADD(t[2][i], s));
+                VSAVE2(2, VADD(t[1][i], t[1][i + 1]));
+                VSAVE2(3, VADD(t[2][1 + i], s));
+            }
+            VSAVE2(0, t[0][7]);
+            VSAVE2(1, VADD(t[2][7], t[3][7]));
+            VSAVE2(2, t[1][7]);
+            VSAVE2(3, t[3][7]);
+        } else
+        {
+#define VSAVE4(i, v) VSTORE(&y[i*18], v)
+            for (i = 0; i < 7; i++, y += 4*18)
+            {
+                f4 s = VADD(t[3][i], t[3][i + 1]);
+                VSAVE4(0, t[0][i]);
+                VSAVE4(1, VADD(t[2][i], s));
+                VSAVE4(2, VADD(t[1][i], t[1][i + 1]));
+                VSAVE4(3, VADD(t[2][1 + i], s));
+            }
+            VSAVE4(0, t[0][7]);
+            VSAVE4(1, VADD(t[2][7], t[3][7]));
+            VSAVE4(2, t[1][7]);
+            VSAVE4(3, t[3][7]);
+        }
+    } else
+#endif /* HAVE_SIMD */
+#ifdef MINIMP3_ONLY_SIMD
+    {}
+#else /* MINIMP3_ONLY_SIMD */
+    for (; k < n; k++)
+    {
+        float t[4][8], *x, *y = grbuf + k;
+
+        for (x = t[0], i = 0; i < 8; i++, x++)
+        {
+            float x0 = y[i*18];
+            float x1 = y[(15 - i)*18];
+            float x2 = y[(16 + i)*18];
+            float x3 = y[(31 - i)*18];
+            float t0 = x0 + x3;
+            float t1 = x1 + x2;
+            float t2 = (x1 - x2)*g_sec[3*i + 0];
+            float t3 = (x0 - x3)*g_sec[3*i + 1];
+            x[0] = t0 + t1;
+            x[8] = (t0 - t1)*g_sec[3*i + 2];
+            x[16] = t3 + t2;
+            x[24] = (t3 - t2)*g_sec[3*i + 2];
+        }
+        for (x = t[0], i = 0; i < 4; i++, x += 8)
+        {
+            float x0 = x[0], x1 = x[1], x2 = x[2], x3 = x[3], x4 = x[4], x5 = x[5], x6 = x[6], x7 = x[7], xt;
+            xt = x0 - x7; x0 += x7;
+            x7 = x1 - x6; x1 += x6;
+            x6 = x2 - x5; x2 += x5;
+            x5 = x3 - x4; x3 += x4;
+            x4 = x0 - x3; x0 += x3;
+            x3 = x1 - x2; x1 += x2;
+            x[0] = x0 + x1;
+            x[4] = (x0 - x1)*0.70710677f;
+            x5 =  x5 + x6;
+            x6 = (x6 + x7)*0.70710677f;
+            x7 =  x7 + xt;
+            x3 = (x3 + x4)*0.70710677f;
+            x5 -= x7*0.198912367f;  /* rotate by PI/8 */
+            x7 += x5*0.382683432f;
+            x5 -= x7*0.198912367f;
+            x0 = xt - x6; xt += x6;
+            x[1] = (xt + x7)*0.50979561f;
+            x[2] = (x4 + x3)*0.54119611f;
+            x[3] = (x0 - x5)*0.60134488f;
+            x[5] = (x0 + x5)*0.89997619f;
+            x[6] = (x4 - x3)*1.30656302f;
+            x[7] = (xt - x7)*2.56291556f;
+
+        }
+        for (i = 0; i < 7; i++, y += 4*18)
+        {
+            y[0*18] = t[0][i];
+            y[1*18] = t[2][i] + t[3][i] + t[3][i + 1];
+            y[2*18] = t[1][i] + t[1][i + 1];
+            y[3*18] = t[2][i + 1] + t[3][i] + t[3][i + 1];
+        }
+        y[0*18] = t[0][7];
+        y[1*18] = t[2][7] + t[3][7];
+        y[2*18] = t[1][7];
+        y[3*18] = t[3][7];
+    }
+#endif /* MINIMP3_ONLY_SIMD */
+}
+
+#ifndef MINIMP3_FLOAT_OUTPUT
+static int16_t mp3d_scale_pcm(float sample)
+{
+#if HAVE_ARMV6
+    int32_t s32 = (int32_t)(sample + .5f);
+    s32 -= (s32 < 0);
+    int16_t s = (int16_t)minimp3_clip_int16_arm(s32);
+#else
+    if (sample >=  32766.5) return (int16_t) 32767;
+    if (sample <= -32767.5) return (int16_t)-32768;
+    int16_t s = (int16_t)(sample + .5f);
+    s -= (s < 0);   /* away from zero, to be compliant */
+#endif
+    return s;
+}
+#else /* MINIMP3_FLOAT_OUTPUT */
+static float mp3d_scale_pcm(float sample)
+{
+    return sample*(1.f/32768.f);
+}
+#endif /* MINIMP3_FLOAT_OUTPUT */
+
+static void mp3d_synth_pair(mp3d_sample_t *pcm, int nch, const float *z)
+{
+    float a;
+    a  = (z[14*64] - z[    0]) * 29;
+    a += (z[ 1*64] + z[13*64]) * 213;
+    a += (z[12*64] - z[ 2*64]) * 459;
+    a += (z[ 3*64] + z[11*64]) * 2037;
+    a += (z[10*64] - z[ 4*64]) * 5153;
+    a += (z[ 5*64] + z[ 9*64]) * 6574;
+    a += (z[ 8*64] - z[ 6*64]) * 37489;
+    a +=  z[ 7*64]             * 75038;
+    pcm[0] = mp3d_scale_pcm(a);
+
+    z += 2;
+    a  = z[14*64] * 104;
+    a += z[12*64] * 1567;
+    a += z[10*64] * 9727;
+    a += z[ 8*64] * 64019;
+    a += z[ 6*64] * -9975;
+    a += z[ 4*64] * -45;
+    a += z[ 2*64] * 146;
+    a += z[ 0*64] * -5;
+    pcm[16*nch] = mp3d_scale_pcm(a);
+}
+
+static void mp3d_synth(float *xl, mp3d_sample_t *dstl, int nch, float *lins)
+{
+    int i;
+    float *xr = xl + 576*(nch - 1);
+    mp3d_sample_t *dstr = dstl + (nch - 1);
+
+    static const float g_win[] = {
+        -1,26,-31,208,218,401,-519,2063,2000,4788,-5517,7134,5959,35640,-39336,74992,
+        -1,24,-35,202,222,347,-581,2080,1952,4425,-5879,7640,5288,33791,-41176,74856,
+        -1,21,-38,196,225,294,-645,2087,1893,4063,-6237,8092,4561,31947,-43006,74630,
+        -1,19,-41,190,227,244,-711,2085,1822,3705,-6589,8492,3776,30112,-44821,74313,
+        -1,17,-45,183,228,197,-779,2075,1739,3351,-6935,8840,2935,28289,-46617,73908,
+        -1,16,-49,176,228,153,-848,2057,1644,3004,-7271,9139,2037,26482,-48390,73415,
+        -2,14,-53,169,227,111,-919,2032,1535,2663,-7597,9389,1082,24694,-50137,72835,
+        -2,13,-58,161,224,72,-991,2001,1414,2330,-7910,9592,70,22929,-51853,72169,
+        -2,11,-63,154,221,36,-1064,1962,1280,2006,-8209,9750,-998,21189,-53534,71420,
+        -2,10,-68,147,215,2,-1137,1919,1131,1692,-8491,9863,-2122,19478,-55178,70590,
+        -3,9,-73,139,208,-29,-1210,1870,970,1388,-8755,9935,-3300,17799,-56778,69679,
+        -3,8,-79,132,200,-57,-1283,1817,794,1095,-8998,9966,-4533,16155,-58333,68692,
+        -4,7,-85,125,189,-83,-1356,1759,605,814,-9219,9959,-5818,14548,-59838,67629,
+        -4,7,-91,117,177,-106,-1428,1698,402,545,-9416,9916,-7154,12980,-61289,66494,
+        -5,6,-97,111,163,-127,-1498,1634,185,288,-9585,9838,-8540,11455,-62684,65290
+    };
+    float *zlin = lins + 15*64;
+    const float *w = g_win;
+
+    zlin[4*15]     = xl[18*16];
+    zlin[4*15 + 1] = xr[18*16];
+    zlin[4*15 + 2] = xl[0];
+    zlin[4*15 + 3] = xr[0];
+
+    zlin[4*31]     = xl[1 + 18*16];
+    zlin[4*31 + 1] = xr[1 + 18*16];
+    zlin[4*31 + 2] = xl[1];
+    zlin[4*31 + 3] = xr[1];
+
+    mp3d_synth_pair(dstr, nch, lins + 4*15 + 1);
+    mp3d_synth_pair(dstr + 32*nch, nch, lins + 4*15 + 64 + 1);
+    mp3d_synth_pair(dstl, nch, lins + 4*15);
+    mp3d_synth_pair(dstl + 32*nch, nch, lins + 4*15 + 64);
+
+#if HAVE_SIMD
+    if (have_simd()) for (i = 14; i >= 0; i--)
+    {
+#define VLOAD(k) f4 w0 = VSET(*w++); f4 w1 = VSET(*w++); f4 vz = VLD(&zlin[4*i - 64*k]); f4 vy = VLD(&zlin[4*i - 64*(15 - k)]);
+#define V0(k) { VLOAD(k) b =         VADD(VMUL(vz, w1), VMUL(vy, w0)) ; a =         VSUB(VMUL(vz, w0), VMUL(vy, w1));  }
+#define V1(k) { VLOAD(k) b = VADD(b, VADD(VMUL(vz, w1), VMUL(vy, w0))); a = VADD(a, VSUB(VMUL(vz, w0), VMUL(vy, w1))); }
+#define V2(k) { VLOAD(k) b = VADD(b, VADD(VMUL(vz, w1), VMUL(vy, w0))); a = VADD(a, VSUB(VMUL(vy, w1), VMUL(vz, w0))); }
+        f4 a, b;
+        zlin[4*i]     = xl[18*(31 - i)];
+        zlin[4*i + 1] = xr[18*(31 - i)];
+        zlin[4*i + 2] = xl[1 + 18*(31 - i)];
+        zlin[4*i + 3] = xr[1 + 18*(31 - i)];
+        zlin[4*i + 64] = xl[1 + 18*(1 + i)];
+        zlin[4*i + 64 + 1] = xr[1 + 18*(1 + i)];
+        zlin[4*i - 64 + 2] = xl[18*(1 + i)];
+        zlin[4*i - 64 + 3] = xr[18*(1 + i)];
+
+        V0(0) V2(1) V1(2) V2(3) V1(4) V2(5) V1(6) V2(7)
+
+        {
+#ifndef MINIMP3_FLOAT_OUTPUT
+#if HAVE_SSE
+            static const f4 g_max = { 32767.0f, 32767.0f, 32767.0f, 32767.0f };
+            static const f4 g_min = { -32768.0f, -32768.0f, -32768.0f, -32768.0f };
+            __m128i pcm8 = _mm_packs_epi32(_mm_cvtps_epi32(_mm_max_ps(_mm_min_ps(a, g_max), g_min)),
+                                           _mm_cvtps_epi32(_mm_max_ps(_mm_min_ps(b, g_max), g_min)));
+            dstr[(15 - i)*nch] = _mm_extract_epi16(pcm8, 1);
+            dstr[(17 + i)*nch] = _mm_extract_epi16(pcm8, 5);
+            dstl[(15 - i)*nch] = _mm_extract_epi16(pcm8, 0);
+            dstl[(17 + i)*nch] = _mm_extract_epi16(pcm8, 4);
+            dstr[(47 - i)*nch] = _mm_extract_epi16(pcm8, 3);
+            dstr[(49 + i)*nch] = _mm_extract_epi16(pcm8, 7);
+            dstl[(47 - i)*nch] = _mm_extract_epi16(pcm8, 2);
+            dstl[(49 + i)*nch] = _mm_extract_epi16(pcm8, 6);
+#else /* HAVE_SSE */
+            int16x4_t pcma, pcmb;
+            a = VADD(a, VSET(0.5f));
+            b = VADD(b, VSET(0.5f));
+            pcma = vqmovn_s32(vqaddq_s32(vcvtq_s32_f32(a), vreinterpretq_s32_u32(vcltq_f32(a, VSET(0)))));
+            pcmb = vqmovn_s32(vqaddq_s32(vcvtq_s32_f32(b), vreinterpretq_s32_u32(vcltq_f32(b, VSET(0)))));
+            vst1_lane_s16(dstr + (15 - i)*nch, pcma, 1);
+            vst1_lane_s16(dstr + (17 + i)*nch, pcmb, 1);
+            vst1_lane_s16(dstl + (15 - i)*nch, pcma, 0);
+            vst1_lane_s16(dstl + (17 + i)*nch, pcmb, 0);
+            vst1_lane_s16(dstr + (47 - i)*nch, pcma, 3);
+            vst1_lane_s16(dstr + (49 + i)*nch, pcmb, 3);
+            vst1_lane_s16(dstl + (47 - i)*nch, pcma, 2);
+            vst1_lane_s16(dstl + (49 + i)*nch, pcmb, 2);
+#endif /* HAVE_SSE */
+
+#else /* MINIMP3_FLOAT_OUTPUT */
+
+            static const f4 g_scale = { 1.0f/32768.0f, 1.0f/32768.0f, 1.0f/32768.0f, 1.0f/32768.0f };
+            a = VMUL(a, g_scale);
+            b = VMUL(b, g_scale);
+#if HAVE_SSE
+            _mm_store_ss(dstr + (15 - i)*nch, _mm_shuffle_ps(a, a, _MM_SHUFFLE(1, 1, 1, 1)));
+            _mm_store_ss(dstr + (17 + i)*nch, _mm_shuffle_ps(b, b, _MM_SHUFFLE(1, 1, 1, 1)));
+            _mm_store_ss(dstl + (15 - i)*nch, _mm_shuffle_ps(a, a, _MM_SHUFFLE(0, 0, 0, 0)));
+            _mm_store_ss(dstl + (17 + i)*nch, _mm_shuffle_ps(b, b, _MM_SHUFFLE(0, 0, 0, 0)));
+            _mm_store_ss(dstr + (47 - i)*nch, _mm_shuffle_ps(a, a, _MM_SHUFFLE(3, 3, 3, 3)));
+            _mm_store_ss(dstr + (49 + i)*nch, _mm_shuffle_ps(b, b, _MM_SHUFFLE(3, 3, 3, 3)));
+            _mm_store_ss(dstl + (47 - i)*nch, _mm_shuffle_ps(a, a, _MM_SHUFFLE(2, 2, 2, 2)));
+            _mm_store_ss(dstl + (49 + i)*nch, _mm_shuffle_ps(b, b, _MM_SHUFFLE(2, 2, 2, 2)));
+#else /* HAVE_SSE */
+            vst1q_lane_f32(dstr + (15 - i)*nch, a, 1);
+            vst1q_lane_f32(dstr + (17 + i)*nch, b, 1);
+            vst1q_lane_f32(dstl + (15 - i)*nch, a, 0);
+            vst1q_lane_f32(dstl + (17 + i)*nch, b, 0);
+            vst1q_lane_f32(dstr + (47 - i)*nch, a, 3);
+            vst1q_lane_f32(dstr + (49 + i)*nch, b, 3);
+            vst1q_lane_f32(dstl + (47 - i)*nch, a, 2);
+            vst1q_lane_f32(dstl + (49 + i)*nch, b, 2);
+#endif /* HAVE_SSE */
+#endif /* MINIMP3_FLOAT_OUTPUT */
+        }
+    } else
+#endif /* HAVE_SIMD */
+#ifdef MINIMP3_ONLY_SIMD
+    {}
+#else /* MINIMP3_ONLY_SIMD */
+    for (i = 14; i >= 0; i--)
+    {
+#define LOAD(k) float w0 = *w++; float w1 = *w++; float *vz = &zlin[4*i - k*64]; float *vy = &zlin[4*i - (15 - k)*64];
+#define S0(k) { int j; LOAD(k); for (j = 0; j < 4; j++) b[j]  = vz[j]*w1 + vy[j]*w0, a[j]  = vz[j]*w0 - vy[j]*w1; }
+#define S1(k) { int j; LOAD(k); for (j = 0; j < 4; j++) b[j] += vz[j]*w1 + vy[j]*w0, a[j] += vz[j]*w0 - vy[j]*w1; }
+#define S2(k) { int j; LOAD(k); for (j = 0; j < 4; j++) b[j] += vz[j]*w1 + vy[j]*w0, a[j] += vy[j]*w1 - vz[j]*w0; }
+        float a[4], b[4];
+
+        zlin[4*i]     = xl[18*(31 - i)];
+        zlin[4*i + 1] = xr[18*(31 - i)];
+        zlin[4*i + 2] = xl[1 + 18*(31 - i)];
+        zlin[4*i + 3] = xr[1 + 18*(31 - i)];
+        zlin[4*(i + 16)]   = xl[1 + 18*(1 + i)];
+        zlin[4*(i + 16) + 1] = xr[1 + 18*(1 + i)];
+        zlin[4*(i - 16) + 2] = xl[18*(1 + i)];
+        zlin[4*(i - 16) + 3] = xr[18*(1 + i)];
+
+        S0(0) S2(1) S1(2) S2(3) S1(4) S2(5) S1(6) S2(7)
+
+        dstr[(15 - i)*nch] = mp3d_scale_pcm(a[1]);
+        dstr[(17 + i)*nch] = mp3d_scale_pcm(b[1]);
+        dstl[(15 - i)*nch] = mp3d_scale_pcm(a[0]);
+        dstl[(17 + i)*nch] = mp3d_scale_pcm(b[0]);
+        dstr[(47 - i)*nch] = mp3d_scale_pcm(a[3]);
+        dstr[(49 + i)*nch] = mp3d_scale_pcm(b[3]);
+        dstl[(47 - i)*nch] = mp3d_scale_pcm(a[2]);
+        dstl[(49 + i)*nch] = mp3d_scale_pcm(b[2]);
+    }
+#endif /* MINIMP3_ONLY_SIMD */
+}
+
+static void mp3d_synth_granule(float *qmf_state, float *grbuf, int nbands, int nch, mp3d_sample_t *pcm, float *lins)
+{
+    int i;
+    for (i = 0; i < nch; i++)
+    {
+        mp3d_DCT_II(grbuf + 576*i, nbands);
+    }
+
+    memcpy(lins, qmf_state, sizeof(float)*15*64);
+
+    for (i = 0; i < nbands; i += 2)
+    {
+        mp3d_synth(grbuf + i, pcm + 32*nch*i, nch, lins + i*64);
+    }
+#ifndef MINIMP3_NONSTANDARD_BUT_LOGICAL
+    if (nch == 1)
+    {
+        for (i = 0; i < 15*64; i += 2)
+        {
+            qmf_state[i] = lins[nbands*64 + i];
+        }
+    } else
+#endif /* MINIMP3_NONSTANDARD_BUT_LOGICAL */
+    {
+        memcpy(qmf_state, lins + nbands*64, sizeof(float)*15*64);
+    }
+}
+
+static int mp3d_match_frame(const uint8_t *hdr, int mp3_bytes, int frame_bytes)
+{
+    int i, nmatch;
+    for (i = 0, nmatch = 0; nmatch < MAX_FRAME_SYNC_MATCHES; nmatch++)
+    {
+        i += hdr_frame_bytes(hdr + i, frame_bytes) + hdr_padding(hdr + i);
+        if (i + HDR_SIZE > mp3_bytes)
+            return nmatch > 0;
+        if (!hdr_compare(hdr, hdr + i))
+            return 0;
+    }
+    return 1;
+}
+
+static int mp3d_find_frame(const uint8_t *mp3, int mp3_bytes, int *free_format_bytes, int *ptr_frame_bytes)
+{
+    int i, k;
+    for (i = 0; i < mp3_bytes - HDR_SIZE; i++, mp3++)
+    {
+        if (hdr_valid(mp3))
+        {
+            int frame_bytes = hdr_frame_bytes(mp3, *free_format_bytes);
+            int frame_and_padding = frame_bytes + hdr_padding(mp3);
+
+            for (k = HDR_SIZE; !frame_bytes && k < MAX_FREE_FORMAT_FRAME_SIZE && i + 2*k < mp3_bytes - HDR_SIZE; k++)
+            {
+                if (hdr_compare(mp3, mp3 + k))
+                {
+                    int fb = k - hdr_padding(mp3);
+                    int nextfb = fb + hdr_padding(mp3 + k);
+                    if (i + k + nextfb + HDR_SIZE > mp3_bytes || !hdr_compare(mp3, mp3 + k + nextfb))
+                        continue;
+                    frame_and_padding = k;
+                    frame_bytes = fb;
+                    *free_format_bytes = fb;
+                }
+            }
+            if ((frame_bytes && i + frame_and_padding <= mp3_bytes &&
+                mp3d_match_frame(mp3, mp3_bytes - i, frame_bytes)) ||
+                (!i && frame_and_padding == mp3_bytes))
+            {
+                *ptr_frame_bytes = frame_and_padding;
+                return i;
+            }
+            *free_format_bytes = 0;
+        }
+    }
+    *ptr_frame_bytes = 0;
+    return mp3_bytes;
+}
+
+void mp3dec_init(mp3dec_t *dec)
+{
+    dec->header[0] = 0;
+}
+
+int mp3dec_decode_frame(mp3dec_t *dec, const uint8_t *mp3, int mp3_bytes, mp3d_sample_t *pcm, mp3dec_frame_info_t *info)
+{
+    int i = 0, igr, frame_size = 0, success = 1;
+    const uint8_t *hdr;
+    bs_t bs_frame[1];
+    mp3dec_scratch_t scratch;
+
+    if (mp3_bytes > 4 && dec->header[0] == 0xff && hdr_compare(dec->header, mp3))
+    {
+        frame_size = hdr_frame_bytes(mp3, dec->free_format_bytes) + hdr_padding(mp3);
+        if (frame_size != mp3_bytes && (frame_size + HDR_SIZE > mp3_bytes || !hdr_compare(mp3, mp3 + frame_size)))
+        {
+            frame_size = 0;
+        }
+    }
+    if (!frame_size)
+    {
+        memset(dec, 0, sizeof(mp3dec_t));
+        i = mp3d_find_frame(mp3, mp3_bytes, &dec->free_format_bytes, &frame_size);
+        if (!frame_size || i + frame_size > mp3_bytes)
+        {
+            info->frame_bytes = i;
+            return 0;
+        }
+    }
+
+    hdr = mp3 + i;
+    memcpy(dec->header, hdr, HDR_SIZE);
+    info->frame_bytes = i + frame_size;
+    info->frame_offset = i;
+    info->channels = HDR_IS_MONO(hdr) ? 1 : 2;
+    info->hz = hdr_sample_rate_hz(hdr);
+    info->layer = 4 - HDR_GET_LAYER(hdr);
+    info->bitrate_kbps = hdr_bitrate_kbps(hdr);
+
+    if (!pcm)
+    {
+        return hdr_frame_samples(hdr);
+    }
+
+    bs_init(bs_frame, hdr + HDR_SIZE, frame_size - HDR_SIZE);
+    if (HDR_IS_CRC(hdr))
+    {
+        get_bits(bs_frame, 16);
+    }
+
+    if (info->layer == 3)
+    {
+        int main_data_begin = L3_read_side_info(bs_frame, scratch.gr_info, hdr);
+        if (main_data_begin < 0 || bs_frame->pos > bs_frame->limit)
+        {
+            mp3dec_init(dec);
+            return 0;
+        }
+        success = L3_restore_reservoir(dec, bs_frame, &scratch, main_data_begin);
+        if (success)
+        {
+            for (igr = 0; igr < (HDR_TEST_MPEG1(hdr) ? 2 : 1); igr++, pcm += 576*info->channels)
+            {
+                memset(scratch.grbuf[0], 0, 576*2*sizeof(float));
+                L3_decode(dec, &scratch, scratch.gr_info + igr*info->channels, info->channels);
+                mp3d_synth_granule(dec->qmf_state, scratch.grbuf[0], 18, info->channels, pcm, scratch.syn[0]);
+            }
+        }
+        L3_save_reservoir(dec, &scratch);
+    } else
+    {
+#ifdef MINIMP3_ONLY_MP3
+        return 0;
+#else /* MINIMP3_ONLY_MP3 */
+        L12_scale_info sci[1];
+        L12_read_scale_info(hdr, bs_frame, sci);
+
+        memset(scratch.grbuf[0], 0, 576*2*sizeof(float));
+        for (i = 0, igr = 0; igr < 3; igr++)
+        {
+            if (12 == (i += L12_dequantize_granule(scratch.grbuf[0] + i, bs_frame, sci, info->layer | 1)))
+            {
+                i = 0;
+                L12_apply_scf_384(sci, sci->scf + igr, scratch.grbuf[0]);
+                mp3d_synth_granule(dec->qmf_state, scratch.grbuf[0], 12, info->channels, pcm, scratch.syn[0]);
+                memset(scratch.grbuf[0], 0, 576*2*sizeof(float));
+                pcm += 384*info->channels;
+            }
+            if (bs_frame->pos > bs_frame->limit)
+            {
+                mp3dec_init(dec);
+                return 0;
+            }
+        }
+#endif /* MINIMP3_ONLY_MP3 */
+    }
+    return success*hdr_frame_samples(dec->header);
+}
+
+#ifdef MINIMP3_FLOAT_OUTPUT
+void mp3dec_f32_to_s16(const float *in, int16_t *out, int num_samples)
+{
+    int i = 0;
+#if HAVE_SIMD
+    int aligned_count = num_samples & ~7;
+    for(; i < aligned_count; i += 8)
+    {
+        static const f4 g_scale = { 32768.0f, 32768.0f, 32768.0f, 32768.0f };
+        f4 a = VMUL(VLD(&in[i  ]), g_scale);
+        f4 b = VMUL(VLD(&in[i+4]), g_scale);
+#if HAVE_SSE
+        static const f4 g_max = { 32767.0f, 32767.0f, 32767.0f, 32767.0f };
+        static const f4 g_min = { -32768.0f, -32768.0f, -32768.0f, -32768.0f };
+        __m128i pcm8 = _mm_packs_epi32(_mm_cvtps_epi32(_mm_max_ps(_mm_min_ps(a, g_max), g_min)),
+                                       _mm_cvtps_epi32(_mm_max_ps(_mm_min_ps(b, g_max), g_min)));
+        out[i  ] = _mm_extract_epi16(pcm8, 0);
+        out[i+1] = _mm_extract_epi16(pcm8, 1);
+        out[i+2] = _mm_extract_epi16(pcm8, 2);
+        out[i+3] = _mm_extract_epi16(pcm8, 3);
+        out[i+4] = _mm_extract_epi16(pcm8, 4);
+        out[i+5] = _mm_extract_epi16(pcm8, 5);
+        out[i+6] = _mm_extract_epi16(pcm8, 6);
+        out[i+7] = _mm_extract_epi16(pcm8, 7);
+#else /* HAVE_SSE */
+        int16x4_t pcma, pcmb;
+        a = VADD(a, VSET(0.5f));
+        b = VADD(b, VSET(0.5f));
+        pcma = vqmovn_s32(vqaddq_s32(vcvtq_s32_f32(a), vreinterpretq_s32_u32(vcltq_f32(a, VSET(0)))));
+        pcmb = vqmovn_s32(vqaddq_s32(vcvtq_s32_f32(b), vreinterpretq_s32_u32(vcltq_f32(b, VSET(0)))));
+        vst1_lane_s16(out+i  , pcma, 0);
+        vst1_lane_s16(out+i+1, pcma, 1);
+        vst1_lane_s16(out+i+2, pcma, 2);
+        vst1_lane_s16(out+i+3, pcma, 3);
+        vst1_lane_s16(out+i+4, pcmb, 0);
+        vst1_lane_s16(out+i+5, pcmb, 1);
+        vst1_lane_s16(out+i+6, pcmb, 2);
+        vst1_lane_s16(out+i+7, pcmb, 3);
+#endif /* HAVE_SSE */
+    }
+#endif /* HAVE_SIMD */
+    for(; i < num_samples; i++)
+    {
+        float sample = in[i] * 32768.0f;
+        if (sample >=  32766.5)
+            out[i] = (int16_t) 32767;
+        else if (sample <= -32767.5)
+            out[i] = (int16_t)-32768;
+        else
+        {
+            int16_t s = (int16_t)(sample + .5f);
+            s -= (s < 0);   /* away from zero, to be compliant */
+            out[i] = s;
+        }
+    }
+}
+#endif /* MINIMP3_FLOAT_OUTPUT */
+#endif /* MINIMP3_IMPLEMENTATION && !_MINIMP3_IMPLEMENTATION_GUARD */
diff --git a/thirdparty/minimp3/minimp3_ex.h b/thirdparty/minimp3/minimp3_ex.h
new file mode 100644
index 0000000000..e29dd15b2e
--- /dev/null
+++ b/thirdparty/minimp3/minimp3_ex.h
@@ -0,0 +1,1394 @@
+#ifndef MINIMP3_EXT_H
+#define MINIMP3_EXT_H
+/*
+    https://github.com/lieff/minimp3
+    To the extent possible under law, the author(s) have dedicated all copyright and related and neighboring rights to this software to the public domain worldwide.
+    This software is distributed without any warranty.
+    See <http://creativecommons.org/publicdomain/zero/1.0/>.
+*/
+#include "minimp3.h"
+
+/* flags for mp3dec_ex_open_* functions */
+#define MP3D_SEEK_TO_BYTE   0      /* mp3dec_ex_seek seeks to byte in stream */
+#define MP3D_SEEK_TO_SAMPLE 1      /* mp3dec_ex_seek precisely seeks to sample using index (created during duration calculation scan or when mp3dec_ex_seek called) */
+#define MP3D_DO_NOT_SCAN    2      /* do not scan whole stream for duration if vbrtag not found, mp3dec_ex_t::samples will be filled only if mp3dec_ex_t::vbr_tag_found == 1 */
+#ifdef MINIMP3_ALLOW_MONO_STEREO_TRANSITION
+#define MP3D_ALLOW_MONO_STEREO_TRANSITION  4
+#define MP3D_FLAGS_MASK 7
+#else
+#define MP3D_FLAGS_MASK 3
+#endif
+
+/* compile-time config */
+#define MINIMP3_PREDECODE_FRAMES 2 /* frames to pre-decode and skip after seek (to fill internal structures) */
+/*#define MINIMP3_SEEK_IDX_LINEAR_SEARCH*/ /* define to use linear index search instead of binary search on seek */
+#define MINIMP3_IO_SIZE (128*1024) /* io buffer size for streaming functions, must be greater than MINIMP3_BUF_SIZE */
+#define MINIMP3_BUF_SIZE (16*1024) /* buffer which can hold minimum 10 consecutive mp3 frames (~16KB) worst case */
+/*#define MINIMP3_SCAN_LIMIT (256*1024)*/ /* how many bytes will be scanned to search first valid mp3 frame, to prevent stall on large non-mp3 files */
+#define MINIMP3_ENABLE_RING 0      /* WIP enable hardware magic ring buffer if available, to make less input buffer memmove(s) in callback IO mode */
+
+/* return error codes */
+#define MP3D_E_PARAM   -1
+#define MP3D_E_MEMORY  -2
+#define MP3D_E_IOERROR -3
+#define MP3D_E_USER    -4  /* can be used to stop processing from callbacks without indicating specific error */
+#define MP3D_E_DECODE  -5  /* decode error which can't be safely skipped, such as sample rate, layer and channels change */
+
+typedef struct
+{
+    mp3d_sample_t *buffer;
+    size_t samples; /* channels included, byte size = samples*sizeof(mp3d_sample_t) */
+    int channels, hz, layer, avg_bitrate_kbps;
+} mp3dec_file_info_t;
+
+typedef struct
+{
+    const uint8_t *buffer;
+    size_t size;
+} mp3dec_map_info_t;
+
+typedef struct
+{
+    uint64_t sample;
+    uint64_t offset;
+} mp3dec_frame_t;
+
+typedef struct
+{
+    mp3dec_frame_t *frames;
+    size_t num_frames, capacity;
+} mp3dec_index_t;
+
+typedef size_t (*MP3D_READ_CB)(void *buf, size_t size, void *user_data);
+typedef int (*MP3D_SEEK_CB)(uint64_t position, void *user_data);
+
+typedef struct
+{
+    MP3D_READ_CB read;
+    void *read_data;
+    MP3D_SEEK_CB seek;
+    void *seek_data;
+} mp3dec_io_t;
+
+typedef struct
+{
+    mp3dec_t mp3d;
+    mp3dec_map_info_t file;
+    mp3dec_io_t *io;
+    mp3dec_index_t index;
+    uint64_t offset, samples, detected_samples, cur_sample, start_offset, end_offset;
+    mp3dec_frame_info_t info;
+    mp3d_sample_t buffer[MINIMP3_MAX_SAMPLES_PER_FRAME];
+    size_t input_consumed, input_filled;
+    int is_file, flags, vbr_tag_found, indexes_built;
+    int free_format_bytes;
+    int buffer_samples, buffer_consumed, to_skip, start_delay;
+    int last_error;
+} mp3dec_ex_t;
+
+typedef int (*MP3D_ITERATE_CB)(void *user_data, const uint8_t *frame, int frame_size, int free_format_bytes, size_t buf_size, uint64_t offset, mp3dec_frame_info_t *info);
+typedef int (*MP3D_PROGRESS_CB)(void *user_data, size_t file_size, uint64_t offset, mp3dec_frame_info_t *info);
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* detect mp3/mpa format */
+int mp3dec_detect_buf(const uint8_t *buf, size_t buf_size);
+int mp3dec_detect_cb(mp3dec_io_t *io, uint8_t *buf, size_t buf_size);
+/* decode whole buffer block */
+int mp3dec_load_buf(mp3dec_t *dec, const uint8_t *buf, size_t buf_size, mp3dec_file_info_t *info, MP3D_PROGRESS_CB progress_cb, void *user_data);
+int mp3dec_load_cb(mp3dec_t *dec, mp3dec_io_t *io, uint8_t *buf, size_t buf_size, mp3dec_file_info_t *info, MP3D_PROGRESS_CB progress_cb, void *user_data);
+/* iterate through frames */
+int mp3dec_iterate_buf(const uint8_t *buf, size_t buf_size, MP3D_ITERATE_CB callback, void *user_data);
+int mp3dec_iterate_cb(mp3dec_io_t *io, uint8_t *buf, size_t buf_size, MP3D_ITERATE_CB callback, void *user_data);
+/* streaming decoder with seeking capability */
+int mp3dec_ex_open_buf(mp3dec_ex_t *dec, const uint8_t *buf, size_t buf_size, int flags);
+int mp3dec_ex_open_cb(mp3dec_ex_t *dec, mp3dec_io_t *io, int flags);
+void mp3dec_ex_close(mp3dec_ex_t *dec);
+int mp3dec_ex_seek(mp3dec_ex_t *dec, uint64_t position);
+size_t mp3dec_ex_read_frame(mp3dec_ex_t *dec, mp3d_sample_t **buf, mp3dec_frame_info_t *frame_info, size_t max_samples);
+size_t mp3dec_ex_read(mp3dec_ex_t *dec, mp3d_sample_t *buf, size_t samples);
+#ifndef MINIMP3_NO_STDIO
+/* stdio versions of file detect, load, iterate and stream */
+int mp3dec_detect(const char *file_name);
+int mp3dec_load(mp3dec_t *dec, const char *file_name, mp3dec_file_info_t *info, MP3D_PROGRESS_CB progress_cb, void *user_data);
+int mp3dec_iterate(const char *file_name, MP3D_ITERATE_CB callback, void *user_data);
+int mp3dec_ex_open(mp3dec_ex_t *dec, const char *file_name, int flags);
+#ifdef _WIN32
+int mp3dec_detect_w(const wchar_t *file_name);
+int mp3dec_load_w(mp3dec_t *dec, const wchar_t *file_name, mp3dec_file_info_t *info, MP3D_PROGRESS_CB progress_cb, void *user_data);
+int mp3dec_iterate_w(const wchar_t *file_name, MP3D_ITERATE_CB callback, void *user_data);
+int mp3dec_ex_open_w(mp3dec_ex_t *dec, const wchar_t *file_name, int flags);
+#endif
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+#endif /*MINIMP3_EXT_H*/
+
+#ifdef MINIMP3_IMPLEMENTATION
+#include <limits.h>
+
+static void mp3dec_skip_id3v1(const uint8_t *buf, size_t *pbuf_size)
+{
+    size_t buf_size = *pbuf_size;
+#ifndef MINIMP3_NOSKIP_ID3V1
+    if (buf_size >= 128 && !memcmp(buf + buf_size - 128, "TAG", 3))
+    {
+        buf_size -= 128;
+        if (buf_size >= 227 && !memcmp(buf + buf_size - 227, "TAG+", 4))
+            buf_size -= 227;
+    }
+#endif
+#ifndef MINIMP3_NOSKIP_APEV2
+    if (buf_size > 32 && !memcmp(buf + buf_size - 32, "APETAGEX", 8))
+    {
+        buf_size -= 32;
+        const uint8_t *tag = buf + buf_size + 8 + 4;
+        uint32_t tag_size = (uint32_t)(tag[3] << 24) | (tag[2] << 16) | (tag[1] << 8) | tag[0];
+        if (buf_size >= tag_size)
+            buf_size -= tag_size;
+    }
+#endif
+    *pbuf_size = buf_size;
+}
+
+static size_t mp3dec_skip_id3v2(const uint8_t *buf, size_t buf_size)
+{
+#define MINIMP3_ID3_DETECT_SIZE 10
+#ifndef MINIMP3_NOSKIP_ID3V2
+    if (buf_size >= MINIMP3_ID3_DETECT_SIZE && !memcmp(buf, "ID3", 3) && !((buf[5] & 15) || (buf[6] & 0x80) || (buf[7] & 0x80) || (buf[8] & 0x80) || (buf[9] & 0x80)))
+    {
+        size_t id3v2size = (((buf[6] & 0x7f) << 21) | ((buf[7] & 0x7f) << 14) | ((buf[8] & 0x7f) << 7) | (buf[9] & 0x7f)) + 10;
+        if ((buf[5] & 16))
+            id3v2size += 10; /* footer */
+        return id3v2size;
+    }
+#endif
+    return 0;
+}
+
+static void mp3dec_skip_id3(const uint8_t **pbuf, size_t *pbuf_size)
+{
+    uint8_t *buf = (uint8_t *)(*pbuf);
+    size_t buf_size = *pbuf_size;
+    size_t id3v2size = mp3dec_skip_id3v2(buf, buf_size);
+    if (id3v2size)
+    {
+        if (id3v2size >= buf_size)
+            id3v2size = buf_size;
+        buf      += id3v2size;
+        buf_size -= id3v2size;
+    }
+    mp3dec_skip_id3v1(buf, &buf_size);
+    *pbuf = (const uint8_t *)buf;
+    *pbuf_size = buf_size;
+}
+
+static int mp3dec_check_vbrtag(const uint8_t *frame, int frame_size, uint32_t *frames, int *delay, int *padding)
+{
+    static const char g_xing_tag[4] = { 'X', 'i', 'n', 'g' };
+    static const char g_info_tag[4] = { 'I', 'n', 'f', 'o' };
+#define FRAMES_FLAG     1
+#define BYTES_FLAG      2
+#define TOC_FLAG        4
+#define VBR_SCALE_FLAG  8
+    /* Side info offsets after header:
+    /                Mono  Stereo
+    /  MPEG1          17     32
+    /  MPEG2 & 2.5     9     17*/
+    bs_t bs[1];
+    L3_gr_info_t gr_info[4];
+    bs_init(bs, frame + HDR_SIZE, frame_size - HDR_SIZE);
+    if (HDR_IS_CRC(frame))
+        get_bits(bs, 16);
+    if (L3_read_side_info(bs, gr_info, frame) < 0)
+        return 0; /* side info corrupted */
+
+    const uint8_t *tag = frame + HDR_SIZE + bs->pos/8;
+    if (memcmp(g_xing_tag, tag, 4) && memcmp(g_info_tag, tag, 4))
+        return 0;
+    int flags = tag[7];
+    if (!((flags & FRAMES_FLAG)))
+        return -1;
+    tag += 8;
+    *frames = (uint32_t)(tag[0] << 24) | (tag[1] << 16) | (tag[2] << 8) | tag[3];
+    tag += 4;
+    if (flags & BYTES_FLAG)
+        tag += 4;
+    if (flags & TOC_FLAG)
+        tag += 100;
+    if (flags & VBR_SCALE_FLAG)
+        tag += 4;
+    *delay = *padding = 0;
+    if (*tag)
+    {   /* extension, LAME, Lavc, etc. Should be the same structure. */
+        tag += 21;
+        if (tag - frame + 14 >= frame_size)
+            return 0;
+        *delay   = ((tag[0] << 4) | (tag[1] >> 4)) + (528 + 1);
+        *padding = (((tag[1] & 0xF) << 8) | tag[2]) - (528 + 1);
+    }
+    return 1;
+}
+
+int mp3dec_detect_buf(const uint8_t *buf, size_t buf_size)
+{
+    return mp3dec_detect_cb(0, (uint8_t *)buf, buf_size);
+}
+
+int mp3dec_detect_cb(mp3dec_io_t *io, uint8_t *buf, size_t buf_size)
+{
+    if (!buf || (size_t)-1 == buf_size || (io && buf_size < MINIMP3_BUF_SIZE))
+        return MP3D_E_PARAM;
+    size_t filled = buf_size;
+    if (io)
+    {
+        if (io->seek(0, io->seek_data))
+            return MP3D_E_IOERROR;
+        filled = io->read(buf, MINIMP3_ID3_DETECT_SIZE, io->read_data);
+        if (filled > MINIMP3_ID3_DETECT_SIZE)
+            return MP3D_E_IOERROR;
+    }
+    if (filled < MINIMP3_ID3_DETECT_SIZE)
+        return MP3D_E_USER; /* too small, can't be mp3/mpa */
+    if (mp3dec_skip_id3v2(buf, filled))
+        return 0; /* id3v2 tag is enough evidence */
+    if (io)
+    {
+        size_t readed = io->read(buf + MINIMP3_ID3_DETECT_SIZE, buf_size - MINIMP3_ID3_DETECT_SIZE, io->read_data);
+        if (readed > (buf_size - MINIMP3_ID3_DETECT_SIZE))
+            return MP3D_E_IOERROR;
+        filled += readed;
+        if (filled < MINIMP3_BUF_SIZE)
+            mp3dec_skip_id3v1(buf, &filled);
+    } else
+    {
+        mp3dec_skip_id3v1(buf, &filled);
+        if (filled > MINIMP3_BUF_SIZE)
+            filled = MINIMP3_BUF_SIZE;
+    }
+    int free_format_bytes, frame_size;
+    mp3d_find_frame(buf, filled, &free_format_bytes, &frame_size);
+    if (frame_size)
+        return 0; /* MAX_FRAME_SYNC_MATCHES consecutive frames found */
+    return MP3D_E_USER;
+}
+
+int mp3dec_load_buf(mp3dec_t *dec, const uint8_t *buf, size_t buf_size, mp3dec_file_info_t *info, MP3D_PROGRESS_CB progress_cb, void *user_data)
+{
+    return mp3dec_load_cb(dec, 0, (uint8_t *)buf, buf_size, info, progress_cb, user_data);
+}
+
+int mp3dec_load_cb(mp3dec_t *dec, mp3dec_io_t *io, uint8_t *buf, size_t buf_size, mp3dec_file_info_t *info, MP3D_PROGRESS_CB progress_cb, void *user_data)
+{
+    if (!dec || !buf || !info || (size_t)-1 == buf_size || (io && buf_size < MINIMP3_BUF_SIZE))
+        return MP3D_E_PARAM;
+    uint64_t detected_samples = 0;
+    size_t orig_buf_size = buf_size;
+    int to_skip = 0;
+    mp3dec_frame_info_t frame_info;
+    memset(info, 0, sizeof(*info));
+    memset(&frame_info, 0, sizeof(frame_info));
+
+    /* skip id3 */
+    size_t filled = 0, consumed = 0;
+    int eof = 0, ret = 0;
+    if (io)
+    {
+        if (io->seek(0, io->seek_data))
+            return MP3D_E_IOERROR;
+        filled = io->read(buf, MINIMP3_ID3_DETECT_SIZE, io->read_data);
+        if (filled > MINIMP3_ID3_DETECT_SIZE)
+            return MP3D_E_IOERROR;
+        if (MINIMP3_ID3_DETECT_SIZE != filled)
+            return 0;
+        size_t id3v2size = mp3dec_skip_id3v2(buf, filled);
+        if (id3v2size)
+        {
+            if (io->seek(id3v2size, io->seek_data))
+                return MP3D_E_IOERROR;
+            filled = io->read(buf, buf_size, io->read_data);
+            if (filled > buf_size)
+                return MP3D_E_IOERROR;
+        } else
+        {
+            size_t readed = io->read(buf + MINIMP3_ID3_DETECT_SIZE, buf_size - MINIMP3_ID3_DETECT_SIZE, io->read_data);
+            if (readed > (buf_size - MINIMP3_ID3_DETECT_SIZE))
+                return MP3D_E_IOERROR;
+            filled += readed;
+        }
+        if (filled < MINIMP3_BUF_SIZE)
+            mp3dec_skip_id3v1(buf, &filled);
+    } else
+    {
+        mp3dec_skip_id3((const uint8_t **)&buf, &buf_size);
+        if (!buf_size)
+            return 0;
+    }
+    /* try to make allocation size assumption by first frame or vbr tag */
+    mp3dec_init(dec);
+    int samples;
+    do
+    {
+        uint32_t frames;
+        int i, delay, padding, free_format_bytes = 0, frame_size = 0;
+        const uint8_t *hdr;
+        if (io)
+        {
+            if (!eof && filled - consumed < MINIMP3_BUF_SIZE)
+            {   /* keep minimum 10 consecutive mp3 frames (~16KB) worst case */
+                memmove(buf, buf + consumed, filled - consumed);
+                filled -= consumed;
+                consumed = 0;
+                size_t readed = io->read(buf + filled, buf_size - filled, io->read_data);
+                if (readed > (buf_size - filled))
+                    return MP3D_E_IOERROR;
+                if (readed != (buf_size - filled))
+                    eof = 1;
+                filled += readed;
+                if (eof)
+                    mp3dec_skip_id3v1(buf, &filled);
+            }
+            i = mp3d_find_frame(buf + consumed, filled - consumed, &free_format_bytes, &frame_size);
+            consumed += i;
+            hdr = buf + consumed;
+        } else
+        {
+            i = mp3d_find_frame(buf, buf_size, &free_format_bytes, &frame_size);
+            buf      += i;
+            buf_size -= i;
+            hdr = buf;
+        }
+        if (i && !frame_size)
+            continue;
+        if (!frame_size)
+            return 0;
+        frame_info.channels = HDR_IS_MONO(hdr) ? 1 : 2;
+        frame_info.hz = hdr_sample_rate_hz(hdr);
+        frame_info.layer = 4 - HDR_GET_LAYER(hdr);
+        frame_info.bitrate_kbps = hdr_bitrate_kbps(hdr);
+        frame_info.frame_bytes = frame_size;
+        samples = hdr_frame_samples(hdr)*frame_info.channels;
+        if (3 != frame_info.layer)
+            break;
+        int ret = mp3dec_check_vbrtag(hdr, frame_size, &frames, &delay, &padding);
+        if (ret > 0)
+        {
+            padding *= frame_info.channels;
+            to_skip = delay*frame_info.channels;
+            detected_samples = samples*(uint64_t)frames;
+            if (detected_samples >= (uint64_t)to_skip)
+                detected_samples -= to_skip;
+            if (padding > 0 && detected_samples >= (uint64_t)padding)
+                detected_samples -= padding;
+            if (!detected_samples)
+                return 0;
+        }
+        if (ret)
+        {
+            if (io)
+            {
+                consumed += frame_size;
+            } else
+            {
+                buf      += frame_size;
+                buf_size -= frame_size;
+            }
+        }
+        break;
+    } while(1);
+    size_t allocated = MINIMP3_MAX_SAMPLES_PER_FRAME*sizeof(mp3d_sample_t);
+    if (detected_samples)
+        allocated += detected_samples*sizeof(mp3d_sample_t);
+    else
+        allocated += (buf_size/frame_info.frame_bytes)*samples*sizeof(mp3d_sample_t);
+    info->buffer = (mp3d_sample_t*)malloc(allocated);
+    if (!info->buffer)
+        return MP3D_E_MEMORY;
+    /* save info */
+    info->channels = frame_info.channels;
+    info->hz       = frame_info.hz;
+    info->layer    = frame_info.layer;
+    /* decode all frames */
+    size_t avg_bitrate_kbps = 0, frames = 0;
+    do
+    {
+        if ((allocated - info->samples*sizeof(mp3d_sample_t)) < MINIMP3_MAX_SAMPLES_PER_FRAME*sizeof(mp3d_sample_t))
+        {
+            allocated *= 2;
+            mp3d_sample_t *alloc_buf = (mp3d_sample_t*)realloc(info->buffer, allocated);
+            if (!alloc_buf)
+                return MP3D_E_MEMORY;
+            info->buffer = alloc_buf;
+        }
+        if (io)
+        {
+            if (!eof && filled - consumed < MINIMP3_BUF_SIZE)
+            {   /* keep minimum 10 consecutive mp3 frames (~16KB) worst case */
+                memmove(buf, buf + consumed, filled - consumed);
+                filled -= consumed;
+                consumed = 0;
+                size_t readed = io->read(buf + filled, buf_size - filled, io->read_data);
+                if (readed != (buf_size - filled))
+                    eof = 1;
+                filled += readed;
+                if (eof)
+                    mp3dec_skip_id3v1(buf, &filled);
+            }
+            samples = mp3dec_decode_frame(dec, buf + consumed, filled - consumed, info->buffer + info->samples, &frame_info);
+            consumed += frame_info.frame_bytes;
+        } else
+        {
+            samples = mp3dec_decode_frame(dec, buf, MINIMP3_MIN(buf_size, (size_t)INT_MAX), info->buffer + info->samples, &frame_info);
+            buf      += frame_info.frame_bytes;
+            buf_size -= frame_info.frame_bytes;
+        }
+        if (samples)
+        {
+            if (info->hz != frame_info.hz || info->layer != frame_info.layer)
+            {
+                ret = MP3D_E_DECODE;
+                break;
+            }
+            if (info->channels && info->channels != frame_info.channels)
+            {
+#ifdef MINIMP3_ALLOW_MONO_STEREO_TRANSITION
+                info->channels = 0; /* mark file with mono-stereo transition */
+#else
+                ret = MP3D_E_DECODE;
+                break;
+#endif
+            }
+            samples *= frame_info.channels;
+            if (to_skip)
+            {
+                size_t skip = MINIMP3_MIN(samples, to_skip);
+                to_skip -= skip;
+                samples -= skip;
+                memmove(info->buffer, info->buffer + skip, samples*sizeof(mp3d_sample_t));
+            }
+            info->samples += samples;
+            avg_bitrate_kbps += frame_info.bitrate_kbps;
+            frames++;
+            if (progress_cb)
+            {
+                ret = progress_cb(user_data, orig_buf_size, orig_buf_size - buf_size, &frame_info);
+                if (ret)
+                    break;
+            }
+        }
+    } while (frame_info.frame_bytes);
+    if (detected_samples && info->samples > detected_samples)
+        info->samples = detected_samples; /* cut padding */
+    /* reallocate to normal buffer size */
+    if (allocated != info->samples*sizeof(mp3d_sample_t))
+    {
+        mp3d_sample_t *alloc_buf = (mp3d_sample_t*)realloc(info->buffer, info->samples*sizeof(mp3d_sample_t));
+        if (!alloc_buf && info->samples)
+            return MP3D_E_MEMORY;
+        info->buffer = alloc_buf;
+    }
+    if (frames)
+        info->avg_bitrate_kbps = avg_bitrate_kbps/frames;
+    return ret;
+}
+
+int mp3dec_iterate_buf(const uint8_t *buf, size_t buf_size, MP3D_ITERATE_CB callback, void *user_data)
+{
+    const uint8_t *orig_buf = buf;
+    if (!buf || (size_t)-1 == buf_size || !callback)
+        return MP3D_E_PARAM;
+    /* skip id3 */
+    mp3dec_skip_id3(&buf, &buf_size);
+    if (!buf_size)
+        return 0;
+    mp3dec_frame_info_t frame_info;
+    memset(&frame_info, 0, sizeof(frame_info));
+    do
+    {
+        int free_format_bytes = 0, frame_size = 0, ret;
+        int i = mp3d_find_frame(buf, buf_size, &free_format_bytes, &frame_size);
+        buf      += i;
+        buf_size -= i;
+        if (i && !frame_size)
+            continue;
+        if (!frame_size)
+            break;
+        const uint8_t *hdr = buf;
+        frame_info.channels = HDR_IS_MONO(hdr) ? 1 : 2;
+        frame_info.hz = hdr_sample_rate_hz(hdr);
+        frame_info.layer = 4 - HDR_GET_LAYER(hdr);
+        frame_info.bitrate_kbps = hdr_bitrate_kbps(hdr);
+        frame_info.frame_bytes = frame_size;
+
+        if (callback)
+        {
+            if ((ret = callback(user_data, hdr, frame_size, free_format_bytes, buf_size, hdr - orig_buf, &frame_info)))
+                return ret;
+        }
+        buf      += frame_size;
+        buf_size -= frame_size;
+    } while (1);
+    return 0;
+}
+
+int mp3dec_iterate_cb(mp3dec_io_t *io, uint8_t *buf, size_t buf_size, MP3D_ITERATE_CB callback, void *user_data)
+{
+    if (!io || !buf || (size_t)-1 == buf_size || buf_size < MINIMP3_BUF_SIZE || !callback)
+        return MP3D_E_PARAM;
+    size_t filled = io->read(buf, MINIMP3_ID3_DETECT_SIZE, io->read_data), consumed = 0;
+    uint64_t readed = 0;
+    mp3dec_frame_info_t frame_info;
+    int eof = 0;
+    memset(&frame_info, 0, sizeof(frame_info));
+    if (filled > MINIMP3_ID3_DETECT_SIZE)
+        return MP3D_E_IOERROR;
+    if (MINIMP3_ID3_DETECT_SIZE != filled)
+        return 0;
+    size_t id3v2size = mp3dec_skip_id3v2(buf, filled);
+    if (id3v2size)
+    {
+        if (io->seek(id3v2size, io->seek_data))
+            return MP3D_E_IOERROR;
+        filled = io->read(buf, buf_size, io->read_data);
+        if (filled > buf_size)
+            return MP3D_E_IOERROR;
+        readed += id3v2size;
+    } else
+    {
+        size_t readed = io->read(buf + MINIMP3_ID3_DETECT_SIZE, buf_size - MINIMP3_ID3_DETECT_SIZE, io->read_data);
+        if (readed > (buf_size - MINIMP3_ID3_DETECT_SIZE))
+            return MP3D_E_IOERROR;
+        filled += readed;
+    }
+    if (filled < MINIMP3_BUF_SIZE)
+        mp3dec_skip_id3v1(buf, &filled);
+    do
+    {
+        int free_format_bytes = 0, frame_size = 0, ret;
+        int i = mp3d_find_frame(buf + consumed, filled - consumed, &free_format_bytes, &frame_size);
+        if (i && !frame_size)
+        {
+            consumed += i;
+            continue;
+        }
+        if (!frame_size)
+            break;
+        const uint8_t *hdr = buf + consumed + i;
+        frame_info.channels = HDR_IS_MONO(hdr) ? 1 : 2;
+        frame_info.hz = hdr_sample_rate_hz(hdr);
+        frame_info.layer = 4 - HDR_GET_LAYER(hdr);
+        frame_info.bitrate_kbps = hdr_bitrate_kbps(hdr);
+        frame_info.frame_bytes = frame_size;
+
+        readed += i;
+        if (callback)
+        {
+            if ((ret = callback(user_data, hdr, frame_size, free_format_bytes, filled - consumed, readed, &frame_info)))
+                return ret;
+        }
+        readed += frame_size;
+        consumed += i + frame_size;
+        if (!eof && filled - consumed < MINIMP3_BUF_SIZE)
+        {   /* keep minimum 10 consecutive mp3 frames (~16KB) worst case */
+            memmove(buf, buf + consumed, filled - consumed);
+            filled -= consumed;
+            consumed = 0;
+            size_t readed = io->read(buf + filled, buf_size - filled, io->read_data);
+            if (readed > (buf_size - filled))
+                return MP3D_E_IOERROR;
+            if (readed != (buf_size - filled))
+                eof = 1;
+            filled += readed;
+            if (eof)
+                mp3dec_skip_id3v1(buf, &filled);
+        }
+    } while (1);
+    return 0;
+}
+
+static int mp3dec_load_index(void *user_data, const uint8_t *frame, int frame_size, int free_format_bytes, size_t buf_size, uint64_t offset, mp3dec_frame_info_t *info)
+{
+    mp3dec_frame_t *idx_frame;
+    mp3dec_ex_t *dec = (mp3dec_ex_t *)user_data;
+    if (!dec->index.frames && !dec->start_offset)
+    {   /* detect VBR tag and try to avoid full scan */
+        uint32_t frames;
+        int delay, padding;
+        dec->info = *info;
+        dec->start_offset = dec->offset = offset;
+        dec->end_offset   = offset + buf_size;
+        dec->free_format_bytes = free_format_bytes; /* should not change */
+        if (3 == dec->info.layer)
+        {
+            int ret = mp3dec_check_vbrtag(frame, frame_size, &frames, &delay, &padding);
+            if (ret)
+                dec->start_offset = dec->offset = offset + frame_size;
+            if (ret > 0)
+            {
+                padding *= info->channels;
+                dec->start_delay = dec->to_skip = delay*info->channels;
+                dec->samples = hdr_frame_samples(frame)*info->channels*(uint64_t)frames;
+                if (dec->samples >= (uint64_t)dec->start_delay)
+                    dec->samples -= dec->start_delay;
+                if (padding > 0 && dec->samples >= (uint64_t)padding)
+                    dec->samples -= padding;
+                dec->detected_samples = dec->samples;
+                dec->vbr_tag_found = 1;
+                return MP3D_E_USER;
+            } else if (ret < 0)
+                return 0;
+        }
+    }
+    if (dec->flags & MP3D_DO_NOT_SCAN)
+        return MP3D_E_USER;
+    if (dec->index.num_frames + 1 > dec->index.capacity)
+    {
+        if (!dec->index.capacity)
+            dec->index.capacity = 4096;
+        else
+            dec->index.capacity *= 2;
+        mp3dec_frame_t *alloc_buf = (mp3dec_frame_t *)realloc((void*)dec->index.frames, sizeof(mp3dec_frame_t)*dec->index.capacity);
+        if (!alloc_buf)
+            return MP3D_E_MEMORY;
+        dec->index.frames = alloc_buf;
+    }
+    idx_frame = &dec->index.frames[dec->index.num_frames++];
+    idx_frame->offset = offset;
+    idx_frame->sample = dec->samples;
+    if (!dec->buffer_samples && dec->index.num_frames < 256)
+    {   /* for some cutted mp3 frames, bit-reservoir not filled and decoding can't be started from first frames */
+        /* try to decode up to 255 first frames till samples starts to decode */
+        dec->buffer_samples = mp3dec_decode_frame(&dec->mp3d, frame, MINIMP3_MIN(buf_size, (size_t)INT_MAX), dec->buffer, info);
+        dec->samples += dec->buffer_samples*info->channels;
+    } else
+        dec->samples += hdr_frame_samples(frame)*info->channels;
+    return 0;
+}
+
+int mp3dec_ex_open_buf(mp3dec_ex_t *dec, const uint8_t *buf, size_t buf_size, int flags)
+{
+    if (!dec || !buf || (size_t)-1 == buf_size || (flags & (~MP3D_FLAGS_MASK)))
+        return MP3D_E_PARAM;
+    memset(dec, 0, sizeof(*dec));
+    dec->file.buffer = buf;
+    dec->file.size   = buf_size;
+    dec->flags       = flags;
+    mp3dec_init(&dec->mp3d);
+    int ret = mp3dec_iterate_buf(dec->file.buffer, dec->file.size, mp3dec_load_index, dec);
+    if (ret && MP3D_E_USER != ret)
+        return ret;
+    mp3dec_init(&dec->mp3d);
+    dec->buffer_samples = 0;
+    dec->indexes_built = !(dec->vbr_tag_found || (flags & MP3D_DO_NOT_SCAN));
+    dec->flags &= (~MP3D_DO_NOT_SCAN);
+    return 0;
+}
+
+#ifndef MINIMP3_SEEK_IDX_LINEAR_SEARCH
+static size_t mp3dec_idx_binary_search(mp3dec_index_t *idx, uint64_t position)
+{
+    size_t end = idx->num_frames, start = 0, index = 0;
+    while (start <= end)
+    {
+        size_t mid = (start + end) / 2;
+        if (idx->frames[mid].sample >= position)
+        {   /* move left side. */
+            if (idx->frames[mid].sample == position)
+                return mid;
+            end = mid - 1;
+        }  else
+        {   /* move to right side */
+            index = mid;
+            start = mid + 1;
+            if (start == idx->num_frames)
+                break;
+        }
+    }
+    return index;
+}
+#endif
+
+int mp3dec_ex_seek(mp3dec_ex_t *dec, uint64_t position)
+{
+    size_t i;
+    if (!dec)
+        return MP3D_E_PARAM;
+    if (!(dec->flags & MP3D_SEEK_TO_SAMPLE))
+    {
+        if (dec->io)
+        {
+            dec->offset = position;
+        } else
+        {
+            dec->offset = MINIMP3_MIN(position, dec->file.size);
+        }
+        dec->cur_sample = 0;
+        goto do_exit;
+    }
+    dec->cur_sample = position;
+    position += dec->start_delay;
+    if (0 == position)
+    {   /* optimize seek to zero, no index needed */
+seek_zero:
+        dec->offset  = dec->start_offset;
+        dec->to_skip = 0;
+        goto do_exit;
+    }
+    if (!dec->indexes_built)
+    {   /* no index created yet (vbr tag used to calculate track length or MP3D_DO_NOT_SCAN open flag used) */
+        dec->indexes_built = 1;
+        dec->samples = 0;
+        dec->buffer_samples = 0;
+        if (dec->io)
+        {
+            if (dec->io->seek(dec->start_offset, dec->io->seek_data))
+                return MP3D_E_IOERROR;
+            int ret = mp3dec_iterate_cb(dec->io, (uint8_t *)dec->file.buffer, dec->file.size, mp3dec_load_index, dec);
+            if (ret && MP3D_E_USER != ret)
+                return ret;
+        } else
+        {
+            int ret = mp3dec_iterate_buf(dec->file.buffer + dec->start_offset, dec->file.size - dec->start_offset, mp3dec_load_index, dec);
+            if (ret && MP3D_E_USER != ret)
+                return ret;
+        }
+        for (i = 0; i < dec->index.num_frames; i++)
+            dec->index.frames[i].offset += dec->start_offset;
+        dec->samples = dec->detected_samples;
+    }
+    if (!dec->index.frames)
+        goto seek_zero; /* no frames in file - seek to zero */
+#ifdef MINIMP3_SEEK_IDX_LINEAR_SEARCH
+    for (i = 0; i < dec->index.num_frames; i++)
+    {
+        if (dec->index.frames[i].sample >= position)
+            break;
+    }
+#else
+    i = mp3dec_idx_binary_search(&dec->index, position);
+#endif
+    if (i)
+    {
+        int to_fill_bytes = 511;
+        int skip_frames = MINIMP3_PREDECODE_FRAMES
+#ifdef MINIMP3_SEEK_IDX_LINEAR_SEARCH
+         + ((dec->index.frames[i].sample == position) ? 0 : 1)
+#endif
+        ;
+        i -= MINIMP3_MIN(i, (size_t)skip_frames);
+        if (3 == dec->info.layer)
+        {
+            while (i && to_fill_bytes)
+            {   /* make sure bit-reservoir is filled when we start decoding */
+                bs_t bs[1];
+                L3_gr_info_t gr_info[4];
+                int frame_bytes, frame_size;
+                const uint8_t *hdr;
+                if (dec->io)
+                {
+                    hdr = dec->file.buffer;
+                    if (dec->io->seek(dec->index.frames[i - 1].offset, dec->io->seek_data))
+                        return MP3D_E_IOERROR;
+                    size_t readed = dec->io->read((uint8_t *)hdr, HDR_SIZE, dec->io->read_data);
+                    if (readed != HDR_SIZE)
+                        return MP3D_E_IOERROR;
+                    frame_size = hdr_frame_bytes(hdr, dec->free_format_bytes) + hdr_padding(hdr);
+                    readed = dec->io->read((uint8_t *)hdr + HDR_SIZE, frame_size - HDR_SIZE, dec->io->read_data);
+                    if (readed != (size_t)(frame_size - HDR_SIZE))
+                        return MP3D_E_IOERROR;
+                    bs_init(bs, hdr + HDR_SIZE, frame_size - HDR_SIZE);
+                } else
+                {
+                    hdr = dec->file.buffer + dec->index.frames[i - 1].offset;
+                    frame_size = hdr_frame_bytes(hdr, dec->free_format_bytes) + hdr_padding(hdr);
+                    bs_init(bs, hdr + HDR_SIZE, frame_size - HDR_SIZE);
+                }
+                if (HDR_IS_CRC(hdr))
+                    get_bits(bs, 16);
+                i--;
+                if (L3_read_side_info(bs, gr_info, hdr) < 0)
+                    break; /* frame not decodable, we can start from here */
+                frame_bytes = (bs->limit - bs->pos)/8;
+                to_fill_bytes -= MINIMP3_MIN(to_fill_bytes, frame_bytes);
+            }
+        }
+    }
+    dec->offset = dec->index.frames[i].offset;
+    dec->to_skip = position - dec->index.frames[i].sample;
+    while ((i + 1) < dec->index.num_frames && !dec->index.frames[i].sample && !dec->index.frames[i + 1].sample)
+    {   /* skip not decodable first frames */
+        const uint8_t *hdr;
+        if (dec->io)
+        {
+            hdr = dec->file.buffer;
+            if (dec->io->seek(dec->index.frames[i].offset, dec->io->seek_data))
+                return MP3D_E_IOERROR;
+            size_t readed = dec->io->read((uint8_t *)hdr, HDR_SIZE, dec->io->read_data);
+            if (readed != HDR_SIZE)
+                return MP3D_E_IOERROR;
+        } else
+            hdr = dec->file.buffer + dec->index.frames[i].offset;
+        dec->to_skip += hdr_frame_samples(hdr)*dec->info.channels;
+        i++;
+    }
+do_exit:
+    if (dec->io)
+    {
+        if (dec->io->seek(dec->offset, dec->io->seek_data))
+            return MP3D_E_IOERROR;
+    }
+    dec->buffer_samples  = 0;
+    dec->buffer_consumed = 0;
+    dec->input_consumed  = 0;
+    dec->input_filled    = 0;
+    dec->last_error      = 0;
+    mp3dec_init(&dec->mp3d);
+    return 0;
+}
+
+size_t mp3dec_ex_read_frame(mp3dec_ex_t *dec, mp3d_sample_t **buf, mp3dec_frame_info_t *frame_info, size_t max_samples)
+{
+    if (!dec || !buf || !frame_info)
+    {
+        if (dec)
+            dec->last_error = MP3D_E_PARAM;
+        return 0;
+    }
+    if (dec->detected_samples && dec->cur_sample >= dec->detected_samples)
+        return 0; /* at end of stream */
+    if (dec->last_error)
+        return 0; /* error eof state, seek can reset it */
+    *buf = NULL;
+    uint64_t end_offset = dec->end_offset ? dec->end_offset : dec->file.size;
+    int eof = 0;
+    while (dec->buffer_consumed == dec->buffer_samples)
+    {
+        const uint8_t *dec_buf;
+        if (dec->io)
+        {
+            if (!eof && (dec->input_filled - dec->input_consumed) < MINIMP3_BUF_SIZE)
+            {   /* keep minimum 10 consecutive mp3 frames (~16KB) worst case */
+                memmove((uint8_t*)dec->file.buffer, (uint8_t*)dec->file.buffer + dec->input_consumed, dec->input_filled - dec->input_consumed);
+                dec->input_filled -= dec->input_consumed;
+                dec->input_consumed = 0;
+                size_t readed = dec->io->read((uint8_t*)dec->file.buffer + dec->input_filled, dec->file.size - dec->input_filled, dec->io->read_data);
+                if (readed > (dec->file.size - dec->input_filled))
+                {
+                    dec->last_error = MP3D_E_IOERROR;
+                    readed = 0;
+                }
+                if (readed != (dec->file.size - dec->input_filled))
+                    eof = 1;
+                dec->input_filled += readed;
+                if (eof)
+                    mp3dec_skip_id3v1((uint8_t*)dec->file.buffer, &dec->input_filled);
+            }
+            dec_buf = dec->file.buffer + dec->input_consumed;
+            if (!(dec->input_filled - dec->input_consumed))
+                return 0;
+            dec->buffer_samples = mp3dec_decode_frame(&dec->mp3d, dec_buf, dec->input_filled - dec->input_consumed, dec->buffer, frame_info);
+            dec->input_consumed += frame_info->frame_bytes;
+        } else
+        {
+            dec_buf = dec->file.buffer + dec->offset;
+            uint64_t buf_size = end_offset - dec->offset;
+            if (!buf_size)
+                return 0;
+            dec->buffer_samples = mp3dec_decode_frame(&dec->mp3d, dec_buf, MINIMP3_MIN(buf_size, (uint64_t)INT_MAX), dec->buffer, frame_info);
+        }
+        dec->buffer_consumed = 0;
+        if (dec->info.hz != frame_info->hz || dec->info.layer != frame_info->layer)
+        {
+return_e_decode:
+            dec->last_error = MP3D_E_DECODE;
+            return 0;
+        }
+        if (dec->buffer_samples)
+        {
+            dec->buffer_samples *= frame_info->channels;
+            if (dec->to_skip)
+            {
+                size_t skip = MINIMP3_MIN(dec->buffer_samples, dec->to_skip);
+                dec->buffer_consumed += skip;
+                dec->to_skip -= skip;
+            }
+            if (
+#ifdef MINIMP3_ALLOW_MONO_STEREO_TRANSITION
+                !(dec->flags & MP3D_ALLOW_MONO_STEREO_TRANSITION) &&
+#endif
+                dec->buffer_consumed != dec->buffer_samples && dec->info.channels != frame_info->channels)
+            {
+                goto return_e_decode;
+            }
+        } else if (dec->to_skip)
+        {   /* In mp3 decoding not always can start decode from any frame because of bit reservoir,
+               count skip samples for such frames */
+            int frame_samples = hdr_frame_samples(dec_buf)*frame_info->channels;
+            dec->to_skip -= MINIMP3_MIN(frame_samples, dec->to_skip);
+        }
+        dec->offset += frame_info->frame_bytes;
+    }
+    size_t out_samples = MINIMP3_MIN((size_t)(dec->buffer_samples - dec->buffer_consumed), max_samples);
+    if (dec->detected_samples)
+    {   /* count decoded samples to properly cut padding */
+        if (dec->cur_sample + out_samples >= dec->detected_samples)
+            out_samples = dec->detected_samples - dec->cur_sample;
+    }
+    dec->cur_sample += out_samples;
+    *buf = dec->buffer + dec->buffer_consumed;
+    dec->buffer_consumed += out_samples;
+    return out_samples;
+}
+
+size_t mp3dec_ex_read(mp3dec_ex_t *dec, mp3d_sample_t *buf, size_t samples)
+{
+    if (!dec || !buf)
+    {
+        if (dec)
+            dec->last_error = MP3D_E_PARAM;
+        return 0;
+    }
+    mp3dec_frame_info_t frame_info;
+    memset(&frame_info, 0, sizeof(frame_info));
+    size_t samples_requested = samples;
+    while (samples)
+    {
+        mp3d_sample_t *buf_frame = NULL;
+        size_t read_samples = mp3dec_ex_read_frame(dec, &buf_frame, &frame_info, samples);
+        if (!read_samples)
+        {
+            break;
+        }
+        memcpy(buf, buf_frame, read_samples * sizeof(mp3d_sample_t));
+        buf += read_samples;
+        samples -= read_samples;
+    }
+    return samples_requested - samples;
+}
+
+int mp3dec_ex_open_cb(mp3dec_ex_t *dec, mp3dec_io_t *io, int flags)
+{
+    if (!dec || !io || (flags & (~MP3D_FLAGS_MASK)))
+        return MP3D_E_PARAM;
+    memset(dec, 0, sizeof(*dec));
+#ifdef MINIMP3_HAVE_RING
+    int ret;
+    if (ret = mp3dec_open_ring(&dec->file, MINIMP3_IO_SIZE))
+        return ret;
+#else
+    dec->file.size = MINIMP3_IO_SIZE;
+    dec->file.buffer = (const uint8_t*)malloc(dec->file.size);
+    if (!dec->file.buffer)
+        return MP3D_E_MEMORY;
+#endif
+    dec->flags = flags;
+    dec->io = io;
+    mp3dec_init(&dec->mp3d);
+    if (io->seek(0, io->seek_data))
+        return MP3D_E_IOERROR;
+    int ret = mp3dec_iterate_cb(io, (uint8_t *)dec->file.buffer, dec->file.size, mp3dec_load_index, dec);
+    if (ret && MP3D_E_USER != ret)
+        return ret;
+    if (dec->io->seek(dec->start_offset, dec->io->seek_data))
+        return MP3D_E_IOERROR;
+    mp3dec_init(&dec->mp3d);
+    dec->buffer_samples = 0;
+    dec->indexes_built = !(dec->vbr_tag_found || (flags & MP3D_DO_NOT_SCAN));
+    dec->flags &= (~MP3D_DO_NOT_SCAN);
+    return 0;
+}
+
+
+#ifndef MINIMP3_NO_STDIO
+
+#if defined(__linux__) || defined(__FreeBSD__)
+#include <errno.h>
+#include <sys/mman.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <fcntl.h>
+#if !defined(_GNU_SOURCE)
+#include <sys/ipc.h>
+#include <sys/shm.h>
+#endif
+#if !defined(MAP_POPULATE) && defined(__linux__)
+#define MAP_POPULATE 0x08000
+#elif !defined(MAP_POPULATE)
+#define MAP_POPULATE 0
+#endif
+
+static void mp3dec_close_file(mp3dec_map_info_t *map_info)
+{
+    if (map_info->buffer && MAP_FAILED != map_info->buffer)
+        munmap((void *)map_info->buffer, map_info->size);
+    map_info->buffer = 0;
+    map_info->size   = 0;
+}
+
+static int mp3dec_open_file(const char *file_name, mp3dec_map_info_t *map_info)
+{
+    if (!file_name)
+        return MP3D_E_PARAM;
+    int file;
+    struct stat st;
+    memset(map_info, 0, sizeof(*map_info));
+retry_open:
+    file = open(file_name, O_RDONLY);
+    if (file < 0 && (errno == EAGAIN || errno == EINTR))
+        goto retry_open;
+    if (file < 0 || fstat(file, &st) < 0)
+    {
+        close(file);
+        return MP3D_E_IOERROR;
+    }
+
+    map_info->size = st.st_size;
+retry_mmap:
+    map_info->buffer = (const uint8_t *)mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE | MAP_POPULATE, file, 0);
+    if (MAP_FAILED == map_info->buffer && (errno == EAGAIN || errno == EINTR))
+        goto retry_mmap;
+    close(file);
+    if (MAP_FAILED == map_info->buffer)
+        return MP3D_E_IOERROR;
+    return 0;
+}
+
+#if MINIMP3_ENABLE_RING && defined(__linux__) && defined(_GNU_SOURCE)
+#define MINIMP3_HAVE_RING
+static void mp3dec_close_ring(mp3dec_map_info_t *map_info)
+{
+#if defined(__linux__) && defined(_GNU_SOURCE)
+    if (map_info->buffer && MAP_FAILED != map_info->buffer)
+        munmap((void *)map_info->buffer, map_info->size*2);
+#else
+    if (map_info->buffer)
+    {
+        shmdt(map_info->buffer);
+        shmdt(map_info->buffer + map_info->size);
+    }
+#endif
+    map_info->buffer = 0;
+    map_info->size   = 0;
+}
+
+static int mp3dec_open_ring(mp3dec_map_info_t *map_info, size_t size)
+{
+    int memfd, page_size;
+#if defined(__linux__) && defined(_GNU_SOURCE)
+    void *buffer;
+    int res;
+#endif
+    memset(map_info, 0, sizeof(*map_info));
+
+#ifdef _SC_PAGESIZE
+    page_size = sysconf(_SC_PAGESIZE);
+#else
+    page_size = getpagesize();
+#endif
+    map_info->size = (size + page_size - 1)/page_size*page_size;
+
+#if defined(__linux__) && defined(_GNU_SOURCE)
+    memfd = memfd_create("mp3_ring", 0);
+    if (memfd < 0)
+        return MP3D_E_MEMORY;
+
+retry_ftruncate:
+    res = ftruncate(memfd, map_info->size);
+    if (res && (errno == EAGAIN || errno == EINTR))
+        goto retry_ftruncate;
+    if (res)
+        goto error;
+
+retry_mmap:
+    map_info->buffer = (const uint8_t *)mmap(NULL, map_info->size*2, PROT_NONE, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
+    if (MAP_FAILED == map_info->buffer && (errno == EAGAIN || errno == EINTR))
+        goto retry_mmap;
+    if (MAP_FAILED == map_info->buffer || !map_info->buffer)
+        goto error;
+retry_mmap2:
+    buffer = mmap((void *)map_info->buffer, map_info->size, PROT_READ | PROT_WRITE, MAP_FIXED | MAP_SHARED, memfd, 0);
+    if (MAP_FAILED == map_info->buffer && (errno == EAGAIN || errno == EINTR))
+        goto retry_mmap2;
+    if (MAP_FAILED == map_info->buffer || buffer != (void *)map_info->buffer)
+        goto error;
+retry_mmap3:
+    buffer = mmap((void *)map_info->buffer + map_info->size, map_info->size, PROT_READ | PROT_WRITE, MAP_FIXED | MAP_SHARED, memfd, 0);
+    if (MAP_FAILED == map_info->buffer && (errno == EAGAIN || errno == EINTR))
+        goto retry_mmap3;
+    if (MAP_FAILED == map_info->buffer || buffer != (void *)(map_info->buffer + map_info->size))
+        goto error;
+
+    close(memfd);
+    return 0;
+error:
+    close(memfd);
+    mp3dec_close_ring(map_info);
+    return MP3D_E_MEMORY;
+#else
+    memfd = shmget(IPC_PRIVATE, map_info->size, IPC_CREAT | 0700);
+    if (memfd < 0)
+        return MP3D_E_MEMORY;
+retry_mmap:
+    map_info->buffer = (const uint8_t *)mmap(NULL, map_info->size*2, PROT_NONE, MAP_PRIVATE, -1, 0);
+    if (MAP_FAILED == map_info->buffer && (errno == EAGAIN || errno == EINTR))
+        goto retry_mmap;
+    if (MAP_FAILED == map_info->buffer)
+        goto error;
+    if (map_info->buffer != shmat(memfd, map_info->buffer, 0))
+        goto error;
+    if ((map_info->buffer + map_info->size) != shmat(memfd, map_info->buffer + map_info->size, 0))
+        goto error;
+    if (shmctl(memfd, IPC_RMID, NULL) < 0)
+        return MP3D_E_MEMORY;
+    return 0;
+error:
+    shmctl(memfd, IPC_RMID, NULL);
+    mp3dec_close_ring(map_info);
+    return MP3D_E_MEMORY;
+#endif
+}
+#endif /*MINIMP3_ENABLE_RING*/
+#elif defined(_WIN32)
+#include <windows.h>
+
+static void mp3dec_close_file(mp3dec_map_info_t *map_info)
+{
+    if (map_info->buffer)
+        UnmapViewOfFile(map_info->buffer);
+    map_info->buffer = 0;
+    map_info->size   = 0;
+}
+
+static int mp3dec_open_file_h(HANDLE file, mp3dec_map_info_t *map_info)
+{
+    memset(map_info, 0, sizeof(*map_info));
+
+    HANDLE mapping = NULL;
+    LARGE_INTEGER s;
+    s.LowPart = GetFileSize(file, (DWORD*)&s.HighPart);
+    if (s.LowPart == INVALID_FILE_SIZE && GetLastError() != NO_ERROR)
+        goto error;
+    map_info->size = s.QuadPart;
+
+    mapping = CreateFileMapping(file, NULL, PAGE_READONLY, 0, 0, NULL);
+    if (!mapping)
+        goto error;
+    map_info->buffer = (const uint8_t*)MapViewOfFile(mapping, FILE_MAP_READ, 0, 0, s.QuadPart);
+    CloseHandle(mapping);
+    if (!map_info->buffer)
+        goto error;
+
+    CloseHandle(file);
+    return 0;
+error:
+    mp3dec_close_file(map_info);
+    CloseHandle(file);
+    return MP3D_E_IOERROR;
+}
+
+static int mp3dec_open_file(const char *file_name, mp3dec_map_info_t *map_info)
+{
+    if (!file_name)
+        return MP3D_E_PARAM;
+    HANDLE file = CreateFileA(file_name, GENERIC_READ, FILE_SHARE_READ, 0, OPEN_EXISTING, 0, 0);
+    if (INVALID_HANDLE_VALUE == file)
+        return MP3D_E_IOERROR;
+    return mp3dec_open_file_h(file, map_info);
+}
+
+static int mp3dec_open_file_w(const wchar_t *file_name, mp3dec_map_info_t *map_info)
+{
+    if (!file_name)
+        return MP3D_E_PARAM;
+    HANDLE file = CreateFileW(file_name, GENERIC_READ, FILE_SHARE_READ, 0, OPEN_EXISTING, 0, 0);
+    if (INVALID_HANDLE_VALUE == file)
+        return MP3D_E_IOERROR;
+    return mp3dec_open_file_h(file, map_info);
+}
+#else
+#include <stdio.h>
+
+static void mp3dec_close_file(mp3dec_map_info_t *map_info)
+{
+    if (map_info->buffer)
+        free((void *)map_info->buffer);
+    map_info->buffer = 0;
+    map_info->size = 0;
+}
+
+static int mp3dec_open_file(const char *file_name, mp3dec_map_info_t *map_info)
+{
+    if (!file_name)
+        return MP3D_E_PARAM;
+    memset(map_info, 0, sizeof(*map_info));
+    FILE *file = fopen(file_name, "rb");
+    if (!file)
+        return MP3D_E_IOERROR;
+    int res = MP3D_E_IOERROR;
+    long size = -1;
+    if (fseek(file, 0, SEEK_END))
+        goto error;
+    size = ftell(file);
+    if (size < 0)
+        goto error;
+    map_info->size = (size_t)size;
+    if (fseek(file, 0, SEEK_SET))
+        goto error;
+    map_info->buffer = (uint8_t *)malloc(map_info->size);
+    if (!map_info->buffer)
+    {
+        res = MP3D_E_MEMORY;
+        goto error;
+    }
+    if (fread((void *)map_info->buffer, 1, map_info->size, file) != map_info->size)
+        goto error;
+    fclose(file);
+    return 0;
+error:
+    mp3dec_close_file(map_info);
+    fclose(file);
+    return res;
+}
+#endif
+
+static int mp3dec_detect_mapinfo(mp3dec_map_info_t *map_info)
+{
+    int ret = mp3dec_detect_buf(map_info->buffer, map_info->size);
+    mp3dec_close_file(map_info);
+    return ret;
+}
+
+static int mp3dec_load_mapinfo(mp3dec_t *dec, mp3dec_map_info_t *map_info, mp3dec_file_info_t *info, MP3D_PROGRESS_CB progress_cb, void *user_data)
+{
+    int ret = mp3dec_load_buf(dec, map_info->buffer, map_info->size, info, progress_cb, user_data);
+    mp3dec_close_file(map_info);
+    return ret;
+}
+
+static int mp3dec_iterate_mapinfo(mp3dec_map_info_t *map_info, MP3D_ITERATE_CB callback, void *user_data)
+{
+    int ret = mp3dec_iterate_buf(map_info->buffer, map_info->size, callback, user_data);
+    mp3dec_close_file(map_info);
+    return ret;
+}
+
+static int mp3dec_ex_open_mapinfo(mp3dec_ex_t *dec, int flags)
+{
+    int ret = mp3dec_ex_open_buf(dec, dec->file.buffer, dec->file.size, flags);
+    dec->is_file = 1;
+    if (ret)
+        mp3dec_ex_close(dec);
+    return ret;
+}
+
+int mp3dec_detect(const char *file_name)
+{
+    int ret;
+    mp3dec_map_info_t map_info;
+    if ((ret = mp3dec_open_file(file_name, &map_info)))
+        return ret;
+    return mp3dec_detect_mapinfo(&map_info);
+}
+
+int mp3dec_load(mp3dec_t *dec, const char *file_name, mp3dec_file_info_t *info, MP3D_PROGRESS_CB progress_cb, void *user_data)
+{
+    int ret;
+    mp3dec_map_info_t map_info;
+    if ((ret = mp3dec_open_file(file_name, &map_info)))
+        return ret;
+    return mp3dec_load_mapinfo(dec, &map_info, info, progress_cb, user_data);
+}
+
+int mp3dec_iterate(const char *file_name, MP3D_ITERATE_CB callback, void *user_data)
+{
+    int ret;
+    mp3dec_map_info_t map_info;
+    if ((ret = mp3dec_open_file(file_name, &map_info)))
+        return ret;
+    return mp3dec_iterate_mapinfo(&map_info, callback, user_data);
+}
+
+int mp3dec_ex_open(mp3dec_ex_t *dec, const char *file_name, int flags)
+{
+    int ret;
+    if (!dec)
+        return MP3D_E_PARAM;
+    if ((ret = mp3dec_open_file(file_name, &dec->file)))
+        return ret;
+    return mp3dec_ex_open_mapinfo(dec, flags);
+}
+
+void mp3dec_ex_close(mp3dec_ex_t *dec)
+{
+#ifdef MINIMP3_HAVE_RING
+    if (dec->io)
+        mp3dec_close_ring(&dec->file);
+#else
+    if (dec->io && dec->file.buffer)
+        free((void*)dec->file.buffer);
+#endif
+    if (dec->is_file)
+        mp3dec_close_file(&dec->file);
+    if (dec->index.frames)
+        free(dec->index.frames);
+    memset(dec, 0, sizeof(*dec));
+}
+
+#ifdef _WIN32
+int mp3dec_detect_w(const wchar_t *file_name)
+{
+    int ret;
+    mp3dec_map_info_t map_info;
+    if ((ret = mp3dec_open_file_w(file_name, &map_info)))
+        return ret;
+    return mp3dec_detect_mapinfo(&map_info);
+}
+
+int mp3dec_load_w(mp3dec_t *dec, const wchar_t *file_name, mp3dec_file_info_t *info, MP3D_PROGRESS_CB progress_cb, void *user_data)
+{
+    int ret;
+    mp3dec_map_info_t map_info;
+    if ((ret = mp3dec_open_file_w(file_name, &map_info)))
+        return ret;
+    return mp3dec_load_mapinfo(dec, &map_info, info, progress_cb, user_data);
+}
+
+int mp3dec_iterate_w(const wchar_t *file_name, MP3D_ITERATE_CB callback, void *user_data)
+{
+    int ret;
+    mp3dec_map_info_t map_info;
+    if ((ret = mp3dec_open_file_w(file_name, &map_info)))
+        return ret;
+    return mp3dec_iterate_mapinfo(&map_info, callback, user_data);
+}
+
+int mp3dec_ex_open_w(mp3dec_ex_t *dec, const wchar_t *file_name, int flags)
+{
+    int ret;
+    if ((ret = mp3dec_open_file_w(file_name, &dec->file)))
+        return ret;
+    return mp3dec_ex_open_mapinfo(dec, flags);
+}
+#endif
+#else /* MINIMP3_NO_STDIO */
+void mp3dec_ex_close(mp3dec_ex_t *dec)
+{
+#ifdef MINIMP3_HAVE_RING
+    if (dec->io)
+        mp3dec_close_ring(&dec->file);
+#else
+    if (dec->io && dec->file.buffer)
+        free((void*)dec->file.buffer);
+#endif
+    if (dec->index.frames)
+        free(dec->index.frames);
+    memset(dec, 0, sizeof(*dec));
+}
+#endif
+
+#endif /*MINIMP3_IMPLEMENTATION*/