Merge pull request #6830 from akien-mga/thirdparty

Move most "drivers" as toggleable "modules" and split their thirdparty libraries in an own tree

1 files changed, 661 insertions, 0 deletions

diff --git a/thirdparty/libmpcdec/mpc_demux.c b/thirdparty/libmpcdec/mpc_demux.c
new file mode 100644
index 0000000000..03bca9c36e
--- /dev/null
+++ b/thirdparty/libmpcdec/mpc_demux.c
@@ -0,0 +1,661 @@
+/*
+  Copyright (c) 2005-2009, The Musepack Development Team
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are
+  met:
+
+  * Redistributions of source code must retain the above copyright
+  notice, this list of conditions and the following disclaimer.
+
+  * Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the following
+  disclaimer in the documentation and/or other materials provided
+  with the distribution.
+
+  * Neither the name of the The Musepack Development Team nor the
+  names of its contributors may be used to endorse or promote
+  products derived from this software without specific prior
+  written permission.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#include <math.h>
+#include <string.h>
+#include <mpc/streaminfo.h>
+#include <mpc/mpcdec.h>
+#include "internal.h"
+#include "decoder.h"
+#include "huffman.h"
+#include "mpc_bits_reader.h"
+
+/// maximum number of seek points in the table. The distance between points will
+/// be adapted so this value is never exceeded.
+#define MAX_SEEK_TABLE_SIZE	65536
+
+// streaminfo.c
+mpc_status streaminfo_read_header_sv8(mpc_streaminfo* si,
+									  const mpc_bits_reader * r_in,
+									  mpc_size_t block_size);
+mpc_status streaminfo_read_header_sv7(mpc_streaminfo* si, mpc_bits_reader * r_in);
+void  streaminfo_encoder_info(mpc_streaminfo* si, const mpc_bits_reader * r_in);
+void  streaminfo_gain(mpc_streaminfo* si, const mpc_bits_reader * r_in);
+
+// mpc_decoder.c
+void mpc_decoder_reset_scf(mpc_decoder * d, int value);
+
+enum {
+	MPC_BUFFER_SWAP = 1,
+	MPC_BUFFER_FULL = 2,
+};
+
+static void mpc_demux_clear_buff(mpc_demux * d)
+{
+	d->bytes_total = 0;
+	d->bits_reader.buff = d->buffer;
+	d->bits_reader.count = 8;
+	d->block_bits = 0;
+	d->block_frames = 0;
+}
+
+static mpc_uint32_t
+mpc_demux_fill(mpc_demux * d, mpc_uint32_t min_bytes, int flags)
+{
+	mpc_uint32_t unread_bytes = d->bytes_total + d->buffer - d->bits_reader.buff
+			- ((8 - d->bits_reader.count) >> 3);
+	int offset = 0;
+
+	if (min_bytes == 0 || min_bytes > DEMUX_BUFFER_SIZE ||
+		    (unread_bytes < min_bytes && flags & MPC_BUFFER_FULL))
+		min_bytes = DEMUX_BUFFER_SIZE;
+
+	if (unread_bytes < min_bytes) {
+		mpc_uint32_t bytes2read = min_bytes - unread_bytes;
+		mpc_uint32_t bytes_free = DEMUX_BUFFER_SIZE - d->bytes_total;
+
+		if (flags & MPC_BUFFER_SWAP) {
+			bytes2read &= -1 << 2;
+			offset = (unread_bytes + 3) & ( -1 << 2);
+			offset -= unread_bytes;
+		}
+
+		if (bytes2read > bytes_free) {
+			if (d->bits_reader.count == 0) {
+				d->bits_reader.count = 8;
+				d->bits_reader.buff++;
+			}
+			memmove(d->buffer + offset, d->bits_reader.buff, unread_bytes);
+			d->bits_reader.buff = d->buffer + offset;
+			d->bytes_total = unread_bytes + offset;
+		}
+		bytes2read = d->r->read(d->r, d->buffer + d->bytes_total, bytes2read);
+		if (flags & MPC_BUFFER_SWAP){
+			unsigned int i, * tmp = (unsigned int *) (d->buffer + d->bytes_total);
+			for(i = 0 ;i < (bytes2read >> 2); i++)
+				tmp[i] = mpc_swap32(tmp[i]);
+		}
+		d->bytes_total += bytes2read;
+		return bytes2read;
+	}
+
+	return (mpc_uint32_t) -1;
+}
+
+/**
+ * checks if a block key is valid
+ * @param key the two caracters key to check
+ * @return MPC_STATUS_INVALIDSV if the key is invalid, MPC_STATUS_OK else
+ */
+static mpc_inline mpc_status mpc_check_key(char * key)
+{
+	if (key[0] < 65 || key[0] > 90 || key[1] < 65 || key[1] > 90)
+		return MPC_STATUS_INVALIDSV;
+	return MPC_STATUS_OK;
+}
+
+/**
+ * seek to a bit position in the stream
+ * @param d demuxer context
+ * @param fpos position in the stream in bits from the beginning of mpc datas
+ * @param min_bytes number of bytes to load after seeking
+ */
+static void
+mpc_demux_seek(mpc_demux * d, mpc_seek_t fpos, mpc_uint32_t min_bytes) {
+	mpc_seek_t next_pos;
+	mpc_int_t bit_offset;
+
+	// FIXME : do not flush the buffer if fpos is in the current buffer
+
+	next_pos = fpos >> 3;
+	if (d->si.stream_version == 7)
+		next_pos = ((next_pos - d->si.header_position) & (-1 << 2)) + d->si.header_position;
+	bit_offset = (int) (fpos - (next_pos << 3));
+
+	d->r->seek(d->r, (mpc_int32_t) next_pos);
+	mpc_demux_clear_buff(d);
+	if (d->si.stream_version == 7)
+		mpc_demux_fill(d, (min_bytes + ((bit_offset + 7) >> 3) + 3) & (~3), MPC_BUFFER_SWAP);
+	else
+		mpc_demux_fill(d, min_bytes + ((bit_offset + 7) >> 3), 0);
+	d->bits_reader.buff += bit_offset >> 3;
+	d->bits_reader.count = 8 - (bit_offset & 7);
+}
+
+/**
+ * return the current position in the stream (in bits) from the beginning
+ * of the file
+ * @param d demuxer context
+ * @return current stream position in bits
+ */
+mpc_seek_t mpc_demux_pos(mpc_demux * d)
+{
+	return (((mpc_seek_t)(d->r->tell(d->r)) - d->bytes_total +
+	         d->bits_reader.buff - d->buffer) << 3) + 8 - d->bits_reader.count;
+}
+
+/**
+ * Searches for a ID3v2-tag and reads the length (in bytes) of it.
+ *
+ * @param d demuxer context
+ * @return size of tag, in bytes
+ * @return MPC_STATUS_FILE on errors of any kind
+ */
+static mpc_int32_t mpc_demux_skip_id3v2(mpc_demux * d)
+{
+	mpc_uint8_t  tmp [4];
+	mpc_bool_t footerPresent;     // ID3v2.4-flag
+	mpc_int32_t size;
+
+    // we must be at the beginning of the stream
+	mpc_demux_fill(d, 3, 0);
+
+    // check id3-tag
+	if ( 0 != memcmp( d->bits_reader.buff, "ID3", 3 ) )
+		return 0;
+
+	mpc_demux_fill(d, 10, 0);
+
+	mpc_bits_read(&d->bits_reader, 24); // read ID3
+	mpc_bits_read(&d->bits_reader, 16); // read tag version
+
+	tmp[0] = mpc_bits_read(&d->bits_reader, 8); // read flags
+	footerPresent = tmp[0] & 0x10;
+	if ( tmp[0] & 0x0F )
+		return MPC_STATUS_FILE; // not (yet???) allowed
+
+	tmp[0] = mpc_bits_read(&d->bits_reader, 8); // read size
+	tmp[1] = mpc_bits_read(&d->bits_reader, 8); // read size
+	tmp[2] = mpc_bits_read(&d->bits_reader, 8); // read size
+	tmp[3] = mpc_bits_read(&d->bits_reader, 8); // read size
+
+	if ( (tmp[0] | tmp[1] | tmp[2] | tmp[3]) & 0x80 )
+		return MPC_STATUS_FILE; // not allowed
+
+    // read headerSize (syncsave: 4 * $0xxxxxxx = 28 significant bits)
+	size = tmp[0] << 21;
+	size |= tmp[1] << 14;
+	size |= tmp[2] << 7;
+	size |= tmp[3];
+
+	if ( footerPresent )
+		size += 10;
+
+	mpc_demux_fill(d, size, 0);
+	d->bits_reader.buff += size;
+
+	return size + 10;
+}
+
+static mpc_status mpc_demux_seek_init(mpc_demux * d)
+{
+	size_t seek_table_size;
+	if (d->seek_table != 0)
+		return MPC_STATUS_OK;
+
+	d->seek_pwr = 6;
+	if (d->si.block_pwr > d->seek_pwr)
+		d->seek_pwr = d->si.block_pwr;
+	seek_table_size = (2 + d->si.samples / (MPC_FRAME_LENGTH << d->seek_pwr));
+	while (seek_table_size > MAX_SEEK_TABLE_SIZE) {
+		d->seek_pwr++;
+		seek_table_size = (2 + d->si.samples / (MPC_FRAME_LENGTH << d->seek_pwr));
+	}
+	d->seek_table = malloc((size_t)(seek_table_size * sizeof(mpc_seek_t)));
+	if (d->seek_table == 0)
+		return MPC_STATUS_FILE;
+	d->seek_table[0] = (mpc_seek_t)mpc_demux_pos(d);
+	d->seek_table_size = 1;
+
+	return MPC_STATUS_OK;
+}
+
+static void mpc_demux_ST(mpc_demux * d)
+{
+	mpc_uint64_t tmp;
+	mpc_seek_t * table, last[2];
+	mpc_bits_reader r = d->bits_reader;
+	mpc_uint_t i, diff_pwr = 0, mask;
+	mpc_uint32_t file_table_size;
+
+	if (d->seek_table != 0)
+		return;
+
+	mpc_bits_get_size(&r, &tmp);
+	file_table_size = (mpc_seek_t) tmp;
+	d->seek_pwr = d->si.block_pwr + mpc_bits_read(&r, 4);
+
+	tmp = 2 + d->si.samples / (MPC_FRAME_LENGTH << d->seek_pwr);
+	while (tmp > MAX_SEEK_TABLE_SIZE) {
+		d->seek_pwr++;
+		diff_pwr++;
+		tmp = 2 + d->si.samples / (MPC_FRAME_LENGTH << d->seek_pwr);
+	}
+	if ((file_table_size >> diff_pwr) > tmp)
+		file_table_size = tmp << diff_pwr;
+	d->seek_table = malloc((size_t) (tmp * sizeof(mpc_seek_t)));
+	d->seek_table_size = (file_table_size + ((1 << diff_pwr) - 1)) >> diff_pwr;
+
+	table = d->seek_table;
+	mpc_bits_get_size(&r, &tmp);
+	table[0] = last[0] = (mpc_seek_t) (tmp + d->si.header_position) * 8;
+
+	if (d->seek_table_size == 1)
+		return;
+
+	mpc_bits_get_size(&r, &tmp);
+	last[1] = (mpc_seek_t) (tmp + d->si.header_position) * 8;
+	if (diff_pwr == 0) table[1] = last[1];
+
+	mask = (1 << diff_pwr) - 1;
+	for (i = 2; i < file_table_size; i++) {
+		int code = mpc_bits_golomb_dec(&r, 12);
+		if (code & 1)
+			code = -(code & (-1 << 1));
+		code <<= 2;
+		last[i & 1] = code + 2 * last[(i-1) & 1] - last[i & 1];
+		if ((i & mask) == 0)
+			table[i >> diff_pwr] = last[i & 1];
+	}
+}
+
+static void mpc_demux_SP(mpc_demux * d, int size, int block_size)
+{
+	mpc_seek_t cur;
+	mpc_uint64_t ptr;
+	mpc_block b;
+	int st_head_size;
+
+	cur = mpc_demux_pos(d);
+	mpc_bits_get_size(&d->bits_reader, &ptr);
+	mpc_demux_seek(d, (ptr - size) * 8 + cur, 11);
+	st_head_size = mpc_bits_get_block(&d->bits_reader, &b);
+	if (memcmp(b.key, "ST", 2) == 0) {
+		d->chap_pos = (ptr - size + b.size + st_head_size) * 8 + cur;
+		d->chap_nb = -1;
+		mpc_demux_fill(d, (mpc_uint32_t) b.size, 0);
+		mpc_demux_ST(d);
+	}
+	mpc_demux_seek(d, cur, 11 + block_size);
+}
+
+static void mpc_demux_chap_find(mpc_demux * d)
+{
+	mpc_block b;
+	int tag_size = 0, chap_size = 0, size, i = 0;
+
+	d->chap_nb = 0;
+
+	if (d->si.stream_version < 8)
+		return;
+
+	if (d->chap_pos == 0) {
+		mpc_uint64_t cur_pos = (d->si.header_position + 4) * 8;
+		mpc_demux_seek(d, cur_pos, 11); // seek to the beginning of the stream
+		size = mpc_bits_get_block(&d->bits_reader, &b);
+		while (memcmp(b.key, "SE", 2) != 0) {
+			if (mpc_check_key(b.key) != MPC_STATUS_OK)
+				return;
+			if (memcmp(b.key, "CT", 2) == 0) {
+				if (d->chap_pos == 0) d->chap_pos = cur_pos;
+			} else
+				d->chap_pos = 0;
+			cur_pos += (size + b.size) * 8;
+			mpc_demux_seek(d, cur_pos, 11);
+			size = mpc_bits_get_block(&d->bits_reader, &b);
+		}
+		if (d->chap_pos == 0)
+			d->chap_pos = cur_pos;
+	}
+
+	mpc_demux_seek(d, d->chap_pos, 20);
+	size = mpc_bits_get_block(&d->bits_reader, &b);
+	while (memcmp(b.key, "CT", 2) == 0) {
+		mpc_uint64_t chap_sample;
+		d->chap_nb++;
+		chap_size += size;
+		size = mpc_bits_get_size(&d->bits_reader, &chap_sample) + 4;
+		chap_size += size;
+		tag_size += b.size - size;
+		mpc_demux_seek(d, d->chap_pos + (chap_size + tag_size) * 8, 20);
+		size = mpc_bits_get_block(&d->bits_reader, &b);
+	}
+
+	if (d->chap_nb > 0) {
+		char * ptag;
+		d->chap = malloc(sizeof(mpc_chap_info) * d->chap_nb + tag_size);
+		ptag = (char*)(d->chap + d->chap_nb);
+
+		mpc_demux_seek(d, d->chap_pos, 11);
+		size = mpc_bits_get_block(&d->bits_reader, &b);
+		while (memcmp(b.key, "CT", 2) == 0) {
+			mpc_demux_fill(d, 11 + (mpc_uint32_t) b.size, 0);
+			size = mpc_bits_get_size(&d->bits_reader, &d->chap[i].sample) + 4;
+			d->chap[i].gain = (mpc_uint16_t) mpc_bits_read(&d->bits_reader, 16);
+			d->chap[i].peak = (mpc_uint16_t) mpc_bits_read(&d->bits_reader, 16);
+			memcpy(ptag, d->bits_reader.buff + ((8 - d->bits_reader.count) >> 3), b.size - size);
+			d->bits_reader.buff += b.size - size;
+			d->chap[i].tag_size = b.size - size;
+			d->chap[i].tag = ptag;
+			ptag += b.size - size;
+			i++;
+			size = mpc_bits_get_block(&d->bits_reader, &b);
+		}
+	}
+
+	d->bits_reader.buff -= size;
+}
+
+/**
+ * Gets the number of chapters in the stream
+ * @param d pointer to a musepack demuxer
+ * @return the number of chapters found in the stream
+ */
+mpc_int_t mpc_demux_chap_nb(mpc_demux * d)
+{
+	if (d->chap_nb == -1)
+		mpc_demux_chap_find(d);
+	return d->chap_nb;
+}
+
+/**
+ * Gets datas associated to a given chapter
+ * The chapter tag is an APEv2 tag without the preamble
+ * @param d pointer to a musepack demuxer
+ * @param chap_nb chapter number you want datas (from 0 to mpc_demux_chap_nb(d) - 1)
+ * @return the chapter information structure
+ */
+mpc_chap_info const * mpc_demux_chap(mpc_demux * d, int chap_nb)
+{
+	if (d->chap_nb == -1)
+		mpc_demux_chap_find(d);
+	if (chap_nb >= d->chap_nb || chap_nb < 0)
+		return 0;
+	return &d->chap[chap_nb];
+}
+
+static mpc_status mpc_demux_header(mpc_demux * d)
+{
+	char magic[4];
+
+	d->si.pns = 0xFF;
+	d->si.profile_name = "n.a.";
+
+    // get header position
+	d->si.header_position = mpc_demux_skip_id3v2(d);
+	if(d->si.header_position < 0) return MPC_STATUS_FILE;
+
+	d->si.tag_offset = d->si.total_file_length = d->r->get_size(d->r);
+
+	mpc_demux_fill(d, 4, 0);
+	magic[0] = mpc_bits_read(&d->bits_reader, 8);
+	magic[1] = mpc_bits_read(&d->bits_reader, 8);
+	magic[2] = mpc_bits_read(&d->bits_reader, 8);
+	magic[3] = mpc_bits_read(&d->bits_reader, 8);
+
+	if (memcmp(magic, "MP+", 3) == 0) {
+		d->si.stream_version = magic[3] & 15;
+		d->si.pns = magic[3] >> 4;
+		if (d->si.stream_version == 7) {
+			mpc_status ret;
+			mpc_demux_fill(d, 6 * 4, MPC_BUFFER_SWAP); // header block size + endian convertion
+			ret = streaminfo_read_header_sv7(&d->si, &d->bits_reader);
+			if (ret != MPC_STATUS_OK) return ret;
+		} else {
+			return MPC_STATUS_INVALIDSV;
+		}
+	} else if (memcmp(magic, "MPCK", 4) == 0) {
+		mpc_block b;
+		int size;
+		mpc_demux_fill(d, 11, 0); // max header block size
+		size = mpc_bits_get_block(&d->bits_reader, &b);
+		while( memcmp(b.key, "AP", 2) != 0 ){ // scan all blocks until audio
+			if (mpc_check_key(b.key) != MPC_STATUS_OK)
+				return MPC_STATUS_INVALIDSV;
+			if (b.size > (mpc_uint64_t) DEMUX_BUFFER_SIZE - 11)
+				return MPC_STATUS_INVALIDSV;
+			mpc_demux_fill(d, 11 + (mpc_uint32_t) b.size, 0);
+			if (memcmp(b.key, "SH", 2) == 0){
+				int ret = streaminfo_read_header_sv8(&d->si, &d->bits_reader, (mpc_uint32_t) b.size);
+				if (ret != MPC_STATUS_OK) return ret;
+			} else if (memcmp(b.key, "RG", 2) == 0)
+				streaminfo_gain(&d->si, &d->bits_reader);
+			else if (memcmp(b.key, "EI", 2) == 0)
+				streaminfo_encoder_info(&d->si, &d->bits_reader);
+			else if (memcmp(b.key, "SO", 2) == 0)
+				mpc_demux_SP(d, size, (mpc_uint32_t) b.size);
+			else if (memcmp(b.key, "ST", 2) == 0)
+				mpc_demux_ST(d);
+			d->bits_reader.buff += b.size;
+			size = mpc_bits_get_block(&d->bits_reader, &b);
+		}
+		d->bits_reader.buff -= size;
+		if (d->si.stream_version == 0) // si not initialized !!!
+			return MPC_STATUS_INVALIDSV;
+	} else
+		return MPC_STATUS_INVALIDSV;
+
+	return MPC_STATUS_OK;
+}
+
+mpc_demux * mpc_demux_init(mpc_reader * p_reader)
+{
+	mpc_demux* p_tmp = malloc(sizeof(mpc_demux));
+
+	if (p_tmp != 0) {
+		memset(p_tmp, 0, sizeof(mpc_demux));
+		p_tmp->r = p_reader;
+		p_tmp->chap_nb = -1;
+		mpc_demux_clear_buff(p_tmp);
+		if (mpc_demux_header(p_tmp) == MPC_STATUS_OK &&
+				  mpc_demux_seek_init(p_tmp) == MPC_STATUS_OK) {
+			p_tmp->d = mpc_decoder_init(&p_tmp->si);
+		} else {
+			if (p_tmp->seek_table)
+				free(p_tmp->seek_table);
+			free(p_tmp);
+			p_tmp = 0;
+		}
+	}
+
+	return p_tmp;
+}
+
+void mpc_demux_exit(mpc_demux * d)
+{
+	mpc_decoder_exit(d->d);
+	free(d->seek_table);
+	free(d->chap);
+	free(d);
+}
+
+void mpc_demux_get_info(mpc_demux * d, mpc_streaminfo * i)
+{
+	memcpy(i, &d->si, sizeof d->si);
+}
+
+mpc_status mpc_demux_decode(mpc_demux * d, mpc_frame_info * i)
+{
+	mpc_bits_reader r;
+	if (d->si.stream_version >= 8) {
+		i->is_key_frame = MPC_FALSE;
+
+		if (d->block_frames == 0) {
+			mpc_block b = {{0,0},0};
+			d->bits_reader.count &= -8;
+			if (d->d->decoded_samples == (d->seek_table_size << d->seek_pwr) * MPC_FRAME_LENGTH) {
+				d->seek_table[d->seek_table_size] = (mpc_seek_t) mpc_demux_pos(d);
+				d->seek_table_size ++;
+			}
+			mpc_demux_fill(d, 11, 0); // max header block size
+			mpc_bits_get_block(&d->bits_reader, &b);
+			while( memcmp(b.key, "AP", 2) != 0 ) { // scan all blocks until audio
+				if (mpc_check_key(b.key) != MPC_STATUS_OK)
+					goto error;
+				if (memcmp(b.key, "SE", 2) == 0) { // end block
+					i->bits = -1;
+					return MPC_STATUS_OK;
+				}
+				if (mpc_demux_fill(d, 11 + (mpc_uint32_t) b.size, 0) == 0)
+					goto error;
+				d->bits_reader.buff += b.size;
+				mpc_bits_get_block(&d->bits_reader, &b);
+			}
+			d->block_bits = (mpc_uint32_t) b.size * 8;
+			d->block_frames = 1 << d->si.block_pwr;
+			i->is_key_frame = MPC_TRUE;
+		}
+		if (d->buffer + d->bytes_total - d->bits_reader.buff <= MAX_FRAME_SIZE)
+			mpc_demux_fill(d, (d->block_bits >> 3) + 1, 0);
+		r = d->bits_reader;
+		mpc_decoder_decode_frame(d->d, &d->bits_reader, i);
+		d->block_bits -= ((d->bits_reader.buff - r.buff) << 3) + r.count - d->bits_reader.count;
+		d->block_frames--;
+		if (d->block_bits < 0 || (d->block_frames == 0 && d->block_bits > 7))
+			goto error;
+	} else {
+		if (d->d->decoded_samples == (d->seek_table_size << d->seek_pwr) * MPC_FRAME_LENGTH) {
+			d->seek_table[d->seek_table_size] = (mpc_seek_t) mpc_demux_pos(d);
+			d->seek_table_size ++;
+		}
+		mpc_demux_fill(d, MAX_FRAME_SIZE, MPC_BUFFER_FULL | MPC_BUFFER_SWAP);
+		d->block_bits = (mpc_int_t) mpc_bits_read(&d->bits_reader, 20); // read frame size
+		if (MPC_FRAME_LENGTH > d->d->samples - d->d->decoded_samples - 1) d->block_bits += 11; // we will read last frame size
+		r = d->bits_reader;
+		mpc_decoder_decode_frame(d->d, &d->bits_reader, i);
+		if (i->bits != -1 && d->block_bits != ((d->bits_reader.buff - r.buff) << 3) + r.count - d->bits_reader.count)
+			goto error;
+	}
+	if (i->bits != -1 && d->buffer + d->bytes_total < d->bits_reader.buff + ((8 - d->bits_reader.count) >> 3))
+		goto error;
+
+	return MPC_STATUS_OK;
+error:
+		i->bits = -1; // we pretend it's end of file
+		return MPC_STATUS_INVALIDSV;
+}
+
+mpc_status mpc_demux_seek_second(mpc_demux * d, double seconds)
+{
+	return mpc_demux_seek_sample(d, (mpc_int64_t)(seconds * (double)d->si.sample_freq + 0.5));
+}
+
+mpc_status mpc_demux_seek_sample(mpc_demux * d, mpc_uint64_t destsample)
+{
+	mpc_uint32_t fwd, samples_to_skip, i;
+	mpc_uint32_t block_samples = MPC_FRAME_LENGTH << d->si.block_pwr;
+	mpc_seek_t fpos;
+
+	destsample += d->si.beg_silence;
+	if (destsample > d->si.samples) destsample = d->si.samples;
+	fwd = (mpc_uint32_t) (destsample / block_samples);
+	samples_to_skip = MPC_DECODER_SYNTH_DELAY +
+			(mpc_uint32_t) (destsample % block_samples);
+	if (d->si.stream_version == 7) {
+		if (fwd > 32) {
+			fwd -= 32;
+			samples_to_skip += MPC_FRAME_LENGTH * 32;
+		} else {
+			samples_to_skip += MPC_FRAME_LENGTH * fwd;
+			fwd = 0;
+		}
+	}
+
+	i = fwd >> (d->seek_pwr - d->si.block_pwr);
+	if (i >= d->seek_table_size)
+		i = d->seek_table_size - 1;
+	fpos = d->seek_table[i];
+	i <<= d->seek_pwr - d->si.block_pwr;
+	d->d->decoded_samples = i * block_samples;
+
+	if (d->si.stream_version >= 8) {
+		mpc_block b;
+		int size;
+		mpc_demux_seek(d, fpos, 11);
+		size = mpc_bits_get_block(&d->bits_reader, &b);
+		while(i < fwd) {
+			if (memcmp(b.key, "AP", 2) == 0) {
+				if (d->d->decoded_samples == (d->seek_table_size << d->seek_pwr) * MPC_FRAME_LENGTH) {
+					d->seek_table[d->seek_table_size] = (mpc_seek_t) mpc_demux_pos(d) - 8 * size;
+					d->seek_table_size ++;
+				}
+				d->d->decoded_samples += block_samples;
+				i++;
+			}
+			fpos += ((mpc_uint32_t)b.size + size) * 8;
+			mpc_demux_seek(d, fpos, 11);
+			size = mpc_bits_get_block(&d->bits_reader, &b);
+		}
+		d->bits_reader.buff -= size;
+	} else {
+		mpc_decoder_reset_scf(d->d, fwd != 0);
+		mpc_demux_seek(d, fpos, 4);
+		for( ; i < fwd; i++){
+			if (d->d->decoded_samples == (d->seek_table_size << d->seek_pwr) * MPC_FRAME_LENGTH) {
+				d->seek_table[d->seek_table_size] = (mpc_seek_t) mpc_demux_pos(d);
+				d->seek_table_size ++;
+			}
+			d->d->decoded_samples += block_samples;
+			fpos += mpc_bits_read(&d->bits_reader, 20) + 20;
+			mpc_demux_seek(d, fpos, 4);
+		}
+	}
+	d->d->samples_to_skip = samples_to_skip;
+	return MPC_STATUS_OK;
+}
+
+void mpc_set_replay_level(mpc_demux * d, float level, mpc_bool_t use_gain,
+						  mpc_bool_t use_title, mpc_bool_t clip_prevention)
+{
+	float peak = use_title ? d->si.peak_title : d->si.peak_album;
+	float gain = use_title ? d->si.gain_title : d->si.gain_album;
+
+	if(!use_gain && !clip_prevention)
+		return;
+
+	if(!peak)
+		peak = 1.;
+	else
+		peak = (1 << 15) / pow(10, peak / (20 * 256));
+
+	if(!gain)
+		gain = 1.;
+	else
+		gain = pow(10, (level - gain / 256) / 20);
+
+	if(clip_prevention && (peak < gain || !use_gain))
+		gain = peak;
+
+	mpc_decoder_scale_output(d->d, gain);
+}