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Diffstat (limited to 'drivers/webp/dsp/yuv.c')
-rw-r--r--drivers/webp/dsp/yuv.c185
1 files changed, 15 insertions, 170 deletions
diff --git a/drivers/webp/dsp/yuv.c b/drivers/webp/dsp/yuv.c
index 4f9cafc104..7f05f9a3aa 100644
--- a/drivers/webp/dsp/yuv.c
+++ b/drivers/webp/dsp/yuv.c
@@ -1,10 +1,8 @@
// Copyright 2010 Google Inc. All Rights Reserved.
//
-// Use of this source code is governed by a BSD-style license
-// that can be found in the COPYING file in the root of the source
-// tree. An additional intellectual property rights grant can be found
-// in the file PATENTS. All contributing project authors may
-// be found in the AUTHORS file in the root of the source tree.
+// This code is licensed under the same terms as WebM:
+// Software License Agreement: http://www.webmproject.org/license/software/
+// Additional IP Rights Grant: http://www.webmproject.org/license/additional/
// -----------------------------------------------------------------------------
//
// YUV->RGB conversion function
@@ -13,8 +11,16 @@
#include "./yuv.h"
+#if defined(__cplusplus) || defined(c_plusplus)
+extern "C" {
+#endif
-#if defined(WEBP_YUV_USE_TABLE)
+enum { YUV_HALF = 1 << (YUV_FIX - 1) };
+
+int16_t VP8kVToR[256], VP8kUToB[256];
+int32_t VP8kVToG[256], VP8kUToG[256];
+uint8_t VP8kClip[YUV_RANGE_MAX - YUV_RANGE_MIN];
+uint8_t VP8kClip4Bits[YUV_RANGE_MAX - YUV_RANGE_MIN];
static int done = 0;
@@ -22,17 +28,11 @@ static WEBP_INLINE uint8_t clip(int v, int max_value) {
return v < 0 ? 0 : v > max_value ? max_value : v;
}
-int16_t VP8kVToR[256], VP8kUToB[256];
-int32_t VP8kVToG[256], VP8kUToG[256];
-uint8_t VP8kClip[YUV_RANGE_MAX - YUV_RANGE_MIN];
-uint8_t VP8kClip4Bits[YUV_RANGE_MAX - YUV_RANGE_MIN];
-
void VP8YUVInit(void) {
int i;
if (done) {
return;
}
-#ifndef USE_YUVj
for (i = 0; i < 256; ++i) {
VP8kVToR[i] = (89858 * (i - 128) + YUV_HALF) >> YUV_FIX;
VP8kUToG[i] = -22014 * (i - 128) + YUV_HALF;
@@ -44,164 +44,9 @@ void VP8YUVInit(void) {
VP8kClip[i - YUV_RANGE_MIN] = clip(k, 255);
VP8kClip4Bits[i - YUV_RANGE_MIN] = clip((k + 8) >> 4, 15);
}
-#else
- for (i = 0; i < 256; ++i) {
- VP8kVToR[i] = (91881 * (i - 128) + YUV_HALF) >> YUV_FIX;
- VP8kUToG[i] = -22554 * (i - 128) + YUV_HALF;
- VP8kVToG[i] = -46802 * (i - 128);
- VP8kUToB[i] = (116130 * (i - 128) + YUV_HALF) >> YUV_FIX;
- }
- for (i = YUV_RANGE_MIN; i < YUV_RANGE_MAX; ++i) {
- const int k = i;
- VP8kClip[i - YUV_RANGE_MIN] = clip(k, 255);
- VP8kClip4Bits[i - YUV_RANGE_MIN] = clip((k + 8) >> 4, 15);
- }
-#endif
-
done = 1;
}
-#else
-
-void VP8YUVInit(void) {}
-
-#endif // WEBP_YUV_USE_TABLE
-
-//-----------------------------------------------------------------------------
-// SSE2 extras
-
-#if defined(WEBP_USE_SSE2)
-
-#ifdef FANCY_UPSAMPLING
-
-#include <emmintrin.h>
-#include <string.h> // for memcpy
-
-typedef union { // handy struct for converting SSE2 registers
- int32_t i32[4];
- uint8_t u8[16];
- __m128i m;
-} VP8kCstSSE2;
-
-static int done_sse2 = 0;
-static VP8kCstSSE2 VP8kUtoRGBA[256], VP8kVtoRGBA[256], VP8kYtoRGBA[256];
-
-void VP8YUVInitSSE2(void) {
- if (!done_sse2) {
- int i;
- for (i = 0; i < 256; ++i) {
- VP8kYtoRGBA[i].i32[0] =
- VP8kYtoRGBA[i].i32[1] =
- VP8kYtoRGBA[i].i32[2] = (i - 16) * kYScale + YUV_HALF2;
- VP8kYtoRGBA[i].i32[3] = 0xff << YUV_FIX2;
-
- VP8kUtoRGBA[i].i32[0] = 0;
- VP8kUtoRGBA[i].i32[1] = -kUToG * (i - 128);
- VP8kUtoRGBA[i].i32[2] = kUToB * (i - 128);
- VP8kUtoRGBA[i].i32[3] = 0;
-
- VP8kVtoRGBA[i].i32[0] = kVToR * (i - 128);
- VP8kVtoRGBA[i].i32[1] = -kVToG * (i - 128);
- VP8kVtoRGBA[i].i32[2] = 0;
- VP8kVtoRGBA[i].i32[3] = 0;
- }
- done_sse2 = 1;
- }
-}
-
-static WEBP_INLINE __m128i VP8GetRGBA32b(int y, int u, int v) {
- const __m128i u_part = _mm_loadu_si128(&VP8kUtoRGBA[u].m);
- const __m128i v_part = _mm_loadu_si128(&VP8kVtoRGBA[v].m);
- const __m128i y_part = _mm_loadu_si128(&VP8kYtoRGBA[y].m);
- const __m128i uv_part = _mm_add_epi32(u_part, v_part);
- const __m128i rgba1 = _mm_add_epi32(y_part, uv_part);
- const __m128i rgba2 = _mm_srai_epi32(rgba1, YUV_FIX2);
- return rgba2;
-}
-
-static WEBP_INLINE void VP8YuvToRgbSSE2(uint8_t y, uint8_t u, uint8_t v,
- uint8_t* const rgb) {
- const __m128i tmp0 = VP8GetRGBA32b(y, u, v);
- const __m128i tmp1 = _mm_packs_epi32(tmp0, tmp0);
- const __m128i tmp2 = _mm_packus_epi16(tmp1, tmp1);
- // Note: we store 8 bytes at a time, not 3 bytes! -> memory stomp
- _mm_storel_epi64((__m128i*)rgb, tmp2);
-}
-
-static WEBP_INLINE void VP8YuvToBgrSSE2(uint8_t y, uint8_t u, uint8_t v,
- uint8_t* const bgr) {
- const __m128i tmp0 = VP8GetRGBA32b(y, u, v);
- const __m128i tmp1 = _mm_shuffle_epi32(tmp0, _MM_SHUFFLE(3, 0, 1, 2));
- const __m128i tmp2 = _mm_packs_epi32(tmp1, tmp1);
- const __m128i tmp3 = _mm_packus_epi16(tmp2, tmp2);
- // Note: we store 8 bytes at a time, not 3 bytes! -> memory stomp
- _mm_storel_epi64((__m128i*)bgr, tmp3);
-}
-
-void VP8YuvToRgba32(const uint8_t* y, const uint8_t* u, const uint8_t* v,
- uint8_t* dst) {
- int n;
- for (n = 0; n < 32; n += 4) {
- const __m128i tmp0_1 = VP8GetRGBA32b(y[n + 0], u[n + 0], v[n + 0]);
- const __m128i tmp0_2 = VP8GetRGBA32b(y[n + 1], u[n + 1], v[n + 1]);
- const __m128i tmp0_3 = VP8GetRGBA32b(y[n + 2], u[n + 2], v[n + 2]);
- const __m128i tmp0_4 = VP8GetRGBA32b(y[n + 3], u[n + 3], v[n + 3]);
- const __m128i tmp1_1 = _mm_packs_epi32(tmp0_1, tmp0_2);
- const __m128i tmp1_2 = _mm_packs_epi32(tmp0_3, tmp0_4);
- const __m128i tmp2 = _mm_packus_epi16(tmp1_1, tmp1_2);
- _mm_storeu_si128((__m128i*)dst, tmp2);
- dst += 4 * 4;
- }
-}
-
-void VP8YuvToBgra32(const uint8_t* y, const uint8_t* u, const uint8_t* v,
- uint8_t* dst) {
- int n;
- for (n = 0; n < 32; n += 2) {
- const __m128i tmp0_1 = VP8GetRGBA32b(y[n + 0], u[n + 0], v[n + 0]);
- const __m128i tmp0_2 = VP8GetRGBA32b(y[n + 1], u[n + 1], v[n + 1]);
- const __m128i tmp1_1 = _mm_shuffle_epi32(tmp0_1, _MM_SHUFFLE(3, 0, 1, 2));
- const __m128i tmp1_2 = _mm_shuffle_epi32(tmp0_2, _MM_SHUFFLE(3, 0, 1, 2));
- const __m128i tmp2_1 = _mm_packs_epi32(tmp1_1, tmp1_2);
- const __m128i tmp3 = _mm_packus_epi16(tmp2_1, tmp2_1);
- _mm_storel_epi64((__m128i*)dst, tmp3);
- dst += 4 * 2;
- }
-}
-
-void VP8YuvToRgb32(const uint8_t* y, const uint8_t* u, const uint8_t* v,
- uint8_t* dst) {
- int n;
- uint8_t tmp0[2 * 3 + 5 + 15];
- uint8_t* const tmp = (uint8_t*)((uintptr_t)(tmp0 + 15) & ~15); // align
- for (n = 0; n < 30; ++n) { // we directly stomp the *dst memory
- VP8YuvToRgbSSE2(y[n], u[n], v[n], dst + n * 3);
- }
- // Last two pixels are special: we write in a tmp buffer before sending
- // to dst.
- VP8YuvToRgbSSE2(y[n + 0], u[n + 0], v[n + 0], tmp + 0);
- VP8YuvToRgbSSE2(y[n + 1], u[n + 1], v[n + 1], tmp + 3);
- memcpy(dst + n * 3, tmp, 2 * 3);
-}
-
-void VP8YuvToBgr32(const uint8_t* y, const uint8_t* u, const uint8_t* v,
- uint8_t* dst) {
- int n;
- uint8_t tmp0[2 * 3 + 5 + 15];
- uint8_t* const tmp = (uint8_t*)((uintptr_t)(tmp0 + 15) & ~15); // align
- for (n = 0; n < 30; ++n) {
- VP8YuvToBgrSSE2(y[n], u[n], v[n], dst + n * 3);
- }
- VP8YuvToBgrSSE2(y[n + 0], u[n + 0], v[n + 0], tmp + 0);
- VP8YuvToBgrSSE2(y[n + 1], u[n + 1], v[n + 1], tmp + 3);
- memcpy(dst + n * 3, tmp, 2 * 3);
-}
-
-#else
-
-void VP8YUVInitSSE2(void) {}
-
-#endif // FANCY_UPSAMPLING
-
-#endif // WEBP_USE_SSE2
-
+#if defined(__cplusplus) || defined(c_plusplus)
+} // extern "C"
+#endif
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