libavcodec/mpc7.c - vendor/opensource/ffmpeg - Git at Google

 /*
  * Musepack SV7 decoder
  * Copyright (c) 2006 Konstantin Shishkov
  *
  * This file is part of FFmpeg.
  *
  * FFmpeg is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
  * FFmpeg is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */

 /**
  * @file libavcodec/mpc7.c Musepack SV7 decoder
  * MPEG Audio Layer 1/2 -like codec with frames of 1152 samples
  * divided into 32 subbands.
  */

 #include "libavutil/lfg.h"
 #include "avcodec.h"
 #include "bitstream.h"
 #include "dsputil.h"
 #include "mpegaudio.h"

 #include "mpc.h"
 #include "mpc7data.h"

 #define BANDS            32
 #define SAMPLES_PER_BAND 36
 #define MPC_FRAME_SIZE   (BANDS * SAMPLES_PER_BAND)

 static VLC scfi_vlc, dscf_vlc, hdr_vlc, quant_vlc[MPC7_QUANT_VLC_TABLES][2];

 static av_cold int mpc7_decode_init(AVCodecContext * avctx)
 {
     int i, j;
     MPCContext *c = avctx->priv_data;
     GetBitContext gb;
     uint8_t buf[16];
     static int vlc_initialized = 0;

     if(avctx->extradata_size < 16){
         av_log(avctx, AV_LOG_ERROR, "Too small extradata size (%i)!\n", avctx->extradata_size);
         return -1;
     }
     memset(c->oldDSCF, 0, sizeof(c->oldDSCF));
     av_lfg_init(&c->rnd, 0xDEADBEEF);
     dsputil_init(&c->dsp, avctx);
     c->dsp.bswap_buf((uint32_t*)buf, (const uint32_t*)avctx->extradata, 4);
     ff_mpc_init();
     init_get_bits(&gb, buf, 128);

     c->IS = get_bits1(&gb);
     c->MSS = get_bits1(&gb);
     c->maxbands = get_bits(&gb, 6);
     if(c->maxbands >= BANDS){
         av_log(avctx, AV_LOG_ERROR, "Too many bands: %i\n", c->maxbands);
         return -1;
     }
     skip_bits(&gb, 88);
     c->gapless = get_bits1(&gb);
     c->lastframelen = get_bits(&gb, 11);
     av_log(avctx, AV_LOG_DEBUG, "IS: %d, MSS: %d, TG: %d, LFL: %d, bands: %d\n",
             c->IS, c->MSS, c->gapless, c->lastframelen, c->maxbands);
     c->frames_to_skip = 0;

     if(vlc_initialized) return 0;
     av_log(avctx, AV_LOG_DEBUG, "Initing VLC\n");
     if(init_vlc(&scfi_vlc, MPC7_SCFI_BITS, MPC7_SCFI_SIZE,
                 &mpc7_scfi[1], 2, 1,
                 &mpc7_scfi[0], 2, 1, INIT_VLC_USE_STATIC)){
         av_log(avctx, AV_LOG_ERROR, "Cannot init SCFI VLC\n");
         return -1;
     }
     if(init_vlc(&dscf_vlc, MPC7_DSCF_BITS, MPC7_DSCF_SIZE,
                 &mpc7_dscf[1], 2, 1,
                 &mpc7_dscf[0], 2, 1, INIT_VLC_USE_STATIC)){
         av_log(avctx, AV_LOG_ERROR, "Cannot init DSCF VLC\n");
         return -1;
     }
     if(init_vlc(&hdr_vlc, MPC7_HDR_BITS, MPC7_HDR_SIZE,
                 &mpc7_hdr[1], 2, 1,
                 &mpc7_hdr[0], 2, 1, INIT_VLC_USE_STATIC)){
         av_log(avctx, AV_LOG_ERROR, "Cannot init HDR VLC\n");
         return -1;
     }
     for(i = 0; i < MPC7_QUANT_VLC_TABLES; i++){
         for(j = 0; j < 2; j++){
             if(init_vlc(&quant_vlc[i][j], 9, mpc7_quant_vlc_sizes[i],
                         &mpc7_quant_vlc[i][j][1], 4, 2,
                         &mpc7_quant_vlc[i][j][0], 4, 2, INIT_VLC_USE_STATIC)){
                 av_log(avctx, AV_LOG_ERROR, "Cannot init QUANT VLC %i,%i\n",i,j);
                 return -1;
             }
         }
     }
     vlc_initialized = 1;
     avctx->sample_fmt = SAMPLE_FMT_S16;
     avctx->channel_layout = (avctx->channels==2) ? CH_LAYOUT_STEREO : CH_LAYOUT_MONO;
     return 0;
 }

 /**
  * Fill samples for given subband
  */
 static inline void idx_to_quant(MPCContext *c, GetBitContext *gb, int idx, int *dst)
 {
     int i, i1, t;
     switch(idx){
     case -1:
         for(i = 0; i < SAMPLES_PER_BAND; i++){
             *dst++ = (av_lfg_get(&c->rnd) & 0x3FC) - 510;
         }
         break;
     case 1:
         i1 = get_bits1(gb);
         for(i = 0; i < SAMPLES_PER_BAND/3; i++){
             t = get_vlc2(gb, quant_vlc[0][i1].table, 9, 2);
             *dst++ = mpc7_idx30[t];
             *dst++ = mpc7_idx31[t];
             *dst++ = mpc7_idx32[t];
         }
         break;
     case 2:
         i1 = get_bits1(gb);
         for(i = 0; i < SAMPLES_PER_BAND/2; i++){
             t = get_vlc2(gb, quant_vlc[1][i1].table, 9, 2);
             *dst++ = mpc7_idx50[t];
             *dst++ = mpc7_idx51[t];
         }
         break;
     case  3: case  4: case  5: case  6: case  7:
         i1 = get_bits1(gb);
         for(i = 0; i < SAMPLES_PER_BAND; i++)
             *dst++ = get_vlc2(gb, quant_vlc[idx-1][i1].table, 9, 2) - mpc7_quant_vlc_off[idx-1];
         break;
     case  8: case  9: case 10: case 11: case 12:
     case 13: case 14: case 15: case 16: case 17:
         t = (1 << (idx - 2)) - 1;
         for(i = 0; i < SAMPLES_PER_BAND; i++)
             *dst++ = get_bits(gb, idx - 1) - t;
         break;
     default: // case 0 and -2..-17
         return;
     }
 }

 static int mpc7_decode_frame(AVCodecContext * avctx,
                             void *data, int *data_size,
                             const uint8_t * buf, int buf_size)
 {
     MPCContext *c = avctx->priv_data;
     GetBitContext gb;
     uint8_t *bits;
     int i, ch, t;
     int mb = -1;
     Band *bands = c->bands;
     int off, out_size;
     int bits_used, bits_avail;

     memset(bands, 0, sizeof(bands));
     if(buf_size <= 4){
         av_log(avctx, AV_LOG_ERROR, "Too small buffer passed (%i bytes)\n", buf_size);
         return AVERROR(EINVAL);
     }

     out_size = (buf[1] ? c->lastframelen : MPC_FRAME_SIZE) * 4;
     if (*data_size < out_size) {
         av_log(avctx, AV_LOG_ERROR, "Output buffer is too small\n");
         return AVERROR(EINVAL);
     }

     bits = av_malloc(((buf_size - 1) & ~3) + FF_INPUT_BUFFER_PADDING_SIZE);
     c->dsp.bswap_buf((uint32_t*)bits, (const uint32_t*)(buf + 4), (buf_size - 4) >> 2);
     init_get_bits(&gb, bits, (buf_size - 4)* 8);
     skip_bits(&gb, buf[0]);

     /* read subband indexes */
     for(i = 0; i <= c->maxbands; i++){
         for(ch = 0; ch < 2; ch++){
             if(i) t = get_vlc2(&gb, hdr_vlc.table, MPC7_HDR_BITS, 1) - 5;
             if(!i || (t == 4)) bands[i].res[ch] = get_bits(&gb, 4);
             else bands[i].res[ch] = bands[i-1].res[ch] + t;
         }

         if(bands[i].res[0] || bands[i].res[1]){
             mb = i;
             if(c->MSS) bands[i].msf = get_bits1(&gb);
         }
     }
     /* get scale indexes coding method */
     for(i = 0; i <= mb; i++)
         for(ch = 0; ch < 2; ch++)
             if(bands[i].res[ch]) bands[i].scfi[ch] = get_vlc2(&gb, scfi_vlc.table, MPC7_SCFI_BITS, 1);
     /* get scale indexes */
     for(i = 0; i <= mb; i++){
         for(ch = 0; ch < 2; ch++){
             if(bands[i].res[ch]){
                 bands[i].scf_idx[ch][2] = c->oldDSCF[ch][i];
                 t = get_vlc2(&gb, dscf_vlc.table, MPC7_DSCF_BITS, 1) - 7;
                 bands[i].scf_idx[ch][0] = (t == 8) ? get_bits(&gb, 6) : (bands[i].scf_idx[ch][2] + t);
                 switch(bands[i].scfi[ch]){
                 case 0:
                     t = get_vlc2(&gb, dscf_vlc.table, MPC7_DSCF_BITS, 1) - 7;
                     bands[i].scf_idx[ch][1] = (t == 8) ? get_bits(&gb, 6) : (bands[i].scf_idx[ch][0] + t);
                     t = get_vlc2(&gb, dscf_vlc.table, MPC7_DSCF_BITS, 1) - 7;
                     bands[i].scf_idx[ch][2] = (t == 8) ? get_bits(&gb, 6) : (bands[i].scf_idx[ch][1] + t);
                     break;
                 case 1:
                     t = get_vlc2(&gb, dscf_vlc.table, MPC7_DSCF_BITS, 1) - 7;
                     bands[i].scf_idx[ch][1] = (t == 8) ? get_bits(&gb, 6) : (bands[i].scf_idx[ch][0] + t);
                     bands[i].scf_idx[ch][2] = bands[i].scf_idx[ch][1];
                     break;
                 case 2:
                     bands[i].scf_idx[ch][1] = bands[i].scf_idx[ch][0];
                     t = get_vlc2(&gb, dscf_vlc.table, MPC7_DSCF_BITS, 1) - 7;
                     bands[i].scf_idx[ch][2] = (t == 8) ? get_bits(&gb, 6) : (bands[i].scf_idx[ch][1] + t);
                     break;
                 case 3:
                     bands[i].scf_idx[ch][2] = bands[i].scf_idx[ch][1] = bands[i].scf_idx[ch][0];
                     break;
                 }
                 c->oldDSCF[ch][i] = bands[i].scf_idx[ch][2];
             }
         }
     }
     /* get quantizers */
     memset(c->Q, 0, sizeof(c->Q));
     off = 0;
     for(i = 0; i < BANDS; i++, off += SAMPLES_PER_BAND)
         for(ch = 0; ch < 2; ch++)
             idx_to_quant(c, &gb, bands[i].res[ch], c->Q[ch] + off);

     ff_mpc_dequantize_and_synth(c, mb, data);

     av_free(bits);

     bits_used = get_bits_count(&gb);
     bits_avail = (buf_size - 4) * 8;
     if(!buf[1] && ((bits_avail < bits_used) || (bits_used + 32 <= bits_avail))){
         av_log(NULL,0, "Error decoding frame: used %i of %i bits\n", bits_used, bits_avail);
         return -1;
     }
     if(c->frames_to_skip){
         c->frames_to_skip--;
         *data_size = 0;
         return buf_size;
     }
     *data_size = out_size;

     return buf_size;
 }

 static void mpc7_decode_flush(AVCodecContext *avctx)
 {
     MPCContext *c = avctx->priv_data;

     memset(c->oldDSCF, 0, sizeof(c->oldDSCF));
     c->frames_to_skip = 32;
 }

 AVCodec mpc7_decoder = {
     "mpc7",
     CODEC_TYPE_AUDIO,
     CODEC_ID_MUSEPACK7,
     sizeof(MPCContext),
     mpc7_decode_init,
     NULL,
     NULL,
     mpc7_decode_frame,
     .flush = mpc7_decode_flush,
     .long_name = NULL_IF_CONFIG_SMALL("Musepack SV7"),
 };
	/*
	* Musepack SV7 decoder
	* Copyright (c) 2006 Konstantin Shishkov
	*
	* This file is part of FFmpeg.
	*
	* FFmpeg is free software; you can redistribute it and/or
	* modify it under the terms of the GNU Lesser General Public
	* License as published by the Free Software Foundation; either
	* version 2.1 of the License, or (at your option) any later version.
	*
	* FFmpeg is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	* Lesser General Public License for more details.
	*
	* You should have received a copy of the GNU Lesser General Public
	* License along with FFmpeg; if not, write to the Free Software
	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	*/

	/**
	* @file libavcodec/mpc7.c Musepack SV7 decoder
	* MPEG Audio Layer 1/2 -like codec with frames of 1152 samples
	* divided into 32 subbands.
	*/

	#include "libavutil/lfg.h"
	#include "avcodec.h"
	#include "bitstream.h"
	#include "dsputil.h"
	#include "mpegaudio.h"

	#include "mpc.h"
	#include "mpc7data.h"

	#define BANDS 32
	#define SAMPLES_PER_BAND 36
	#define MPC_FRAME_SIZE (BANDS * SAMPLES_PER_BAND)

	static VLC scfi_vlc, dscf_vlc, hdr_vlc, quant_vlc[MPC7_QUANT_VLC_TABLES][2];

	static av_cold int mpc7_decode_init(AVCodecContext * avctx)
	{
	int i, j;
	MPCContext *c = avctx->priv_data;
	GetBitContext gb;
	uint8_t buf[16];
	static int vlc_initialized = 0;

	if(avctx->extradata_size < 16){
	av_log(avctx, AV_LOG_ERROR, "Too small extradata size (%i)!\n", avctx->extradata_size);
	return -1;
	}
	memset(c->oldDSCF, 0, sizeof(c->oldDSCF));
	av_lfg_init(&c->rnd, 0xDEADBEEF);
	dsputil_init(&c->dsp, avctx);
	c->dsp.bswap_buf((uint32_t)buf, (const uint32_t)avctx->extradata, 4);
	ff_mpc_init();
	init_get_bits(&gb, buf, 128);

	c->IS = get_bits1(&gb);
	c->MSS = get_bits1(&gb);
	c->maxbands = get_bits(&gb, 6);
	if(c->maxbands >= BANDS){
	av_log(avctx, AV_LOG_ERROR, "Too many bands: %i\n", c->maxbands);
	return -1;
	}
	skip_bits(&gb, 88);
	c->gapless = get_bits1(&gb);
	c->lastframelen = get_bits(&gb, 11);
	av_log(avctx, AV_LOG_DEBUG, "IS: %d, MSS: %d, TG: %d, LFL: %d, bands: %d\n",
	c->IS, c->MSS, c->gapless, c->lastframelen, c->maxbands);
	c->frames_to_skip = 0;

	if(vlc_initialized) return 0;
	av_log(avctx, AV_LOG_DEBUG, "Initing VLC\n");
	if(init_vlc(&scfi_vlc, MPC7_SCFI_BITS, MPC7_SCFI_SIZE,
	&mpc7_scfi[1], 2, 1,
	&mpc7_scfi[0], 2, 1, INIT_VLC_USE_STATIC)){
	av_log(avctx, AV_LOG_ERROR, "Cannot init SCFI VLC\n");
	return -1;
	}
	if(init_vlc(&dscf_vlc, MPC7_DSCF_BITS, MPC7_DSCF_SIZE,
	&mpc7_dscf[1], 2, 1,
	&mpc7_dscf[0], 2, 1, INIT_VLC_USE_STATIC)){
	av_log(avctx, AV_LOG_ERROR, "Cannot init DSCF VLC\n");
	return -1;
	}
	if(init_vlc(&hdr_vlc, MPC7_HDR_BITS, MPC7_HDR_SIZE,
	&mpc7_hdr[1], 2, 1,
	&mpc7_hdr[0], 2, 1, INIT_VLC_USE_STATIC)){
	av_log(avctx, AV_LOG_ERROR, "Cannot init HDR VLC\n");
	return -1;
	}
	for(i = 0; i < MPC7_QUANT_VLC_TABLES; i++){
	for(j = 0; j < 2; j++){
	if(init_vlc(&quant_vlc[i][j], 9, mpc7_quant_vlc_sizes[i],
	&mpc7_quant_vlc[i][j][1], 4, 2,
	&mpc7_quant_vlc[i][j][0], 4, 2, INIT_VLC_USE_STATIC)){
	av_log(avctx, AV_LOG_ERROR, "Cannot init QUANT VLC %i,%i\n",i,j);
	return -1;
	}
	}
	}
	vlc_initialized = 1;
	avctx->sample_fmt = SAMPLE_FMT_S16;
	avctx->channel_layout = (avctx->channels==2) ? CH_LAYOUT_STEREO : CH_LAYOUT_MONO;
	return 0;
	}

	/**
	* Fill samples for given subband
	*/
	static inline void idx_to_quant(MPCContext c, GetBitContext gb, int idx, int *dst)
	{
	int i, i1, t;
	switch(idx){
	case -1:
	for(i = 0; i < SAMPLES_PER_BAND; i++){
	*dst++ = (av_lfg_get(&c->rnd) & 0x3FC) - 510;
	}
	break;
	case 1:
	i1 = get_bits1(gb);
	for(i = 0; i < SAMPLES_PER_BAND/3; i++){
	t = get_vlc2(gb, quant_vlc[0][i1].table, 9, 2);
	*dst++ = mpc7_idx30[t];
	*dst++ = mpc7_idx31[t];
	*dst++ = mpc7_idx32[t];
	}
	break;
	case 2:
	i1 = get_bits1(gb);
	for(i = 0; i < SAMPLES_PER_BAND/2; i++){
	t = get_vlc2(gb, quant_vlc[1][i1].table, 9, 2);
	*dst++ = mpc7_idx50[t];
	*dst++ = mpc7_idx51[t];
	}
	break;
	case 3: case 4: case 5: case 6: case 7:
	i1 = get_bits1(gb);
	for(i = 0; i < SAMPLES_PER_BAND; i++)
	*dst++ = get_vlc2(gb, quant_vlc[idx-1][i1].table, 9, 2) - mpc7_quant_vlc_off[idx-1];
	break;
	case 8: case 9: case 10: case 11: case 12:
	case 13: case 14: case 15: case 16: case 17:
	t = (1 << (idx - 2)) - 1;
	for(i = 0; i < SAMPLES_PER_BAND; i++)
	*dst++ = get_bits(gb, idx - 1) - t;
	break;
	default: // case 0 and -2..-17
	return;
	}
	}

	static int mpc7_decode_frame(AVCodecContext * avctx,
	void data, int data_size,
	const uint8_t * buf, int buf_size)
	{
	MPCContext *c = avctx->priv_data;
	GetBitContext gb;
	uint8_t *bits;
	int i, ch, t;
	int mb = -1;
	Band *bands = c->bands;
	int off, out_size;
	int bits_used, bits_avail;

	memset(bands, 0, sizeof(bands));
	if(buf_size <= 4){
	av_log(avctx, AV_LOG_ERROR, "Too small buffer passed (%i bytes)\n", buf_size);
	return AVERROR(EINVAL);
	}

	out_size = (buf[1] ? c->lastframelen : MPC_FRAME_SIZE) * 4;
	if (*data_size < out_size) {
	av_log(avctx, AV_LOG_ERROR, "Output buffer is too small\n");
	return AVERROR(EINVAL);
	}

	bits = av_malloc(((buf_size - 1) & ~3) + FF_INPUT_BUFFER_PADDING_SIZE);
	c->dsp.bswap_buf((uint32_t)bits, (const uint32_t)(buf + 4), (buf_size - 4) >> 2);
	init_get_bits(&gb, bits, (buf_size - 4)* 8);
	skip_bits(&gb, buf[0]);

	/* read subband indexes */
	for(i = 0; i <= c->maxbands; i++){
	for(ch = 0; ch < 2; ch++){
	if(i) t = get_vlc2(&gb, hdr_vlc.table, MPC7_HDR_BITS, 1) - 5;
	if(!i \|\| (t == 4)) bands[i].res[ch] = get_bits(&gb, 4);
	else bands[i].res[ch] = bands[i-1].res[ch] + t;
	}

	if(bands[i].res[0] \|\| bands[i].res[1]){
	mb = i;
	if(c->MSS) bands[i].msf = get_bits1(&gb);
	}
	}
	/* get scale indexes coding method */
	for(i = 0; i <= mb; i++)
	for(ch = 0; ch < 2; ch++)
	if(bands[i].res[ch]) bands[i].scfi[ch] = get_vlc2(&gb, scfi_vlc.table, MPC7_SCFI_BITS, 1);
	/* get scale indexes */
	for(i = 0; i <= mb; i++){
	for(ch = 0; ch < 2; ch++){
	if(bands[i].res[ch]){
	bands[i].scf_idx[ch][2] = c->oldDSCF[ch][i];
	t = get_vlc2(&gb, dscf_vlc.table, MPC7_DSCF_BITS, 1) - 7;
	bands[i].scf_idx[ch][0] = (t == 8) ? get_bits(&gb, 6) : (bands[i].scf_idx[ch][2] + t);
	switch(bands[i].scfi[ch]){
	case 0:
	t = get_vlc2(&gb, dscf_vlc.table, MPC7_DSCF_BITS, 1) - 7;
	bands[i].scf_idx[ch][1] = (t == 8) ? get_bits(&gb, 6) : (bands[i].scf_idx[ch][0] + t);
	t = get_vlc2(&gb, dscf_vlc.table, MPC7_DSCF_BITS, 1) - 7;
	bands[i].scf_idx[ch][2] = (t == 8) ? get_bits(&gb, 6) : (bands[i].scf_idx[ch][1] + t);
	break;
	case 1:
	t = get_vlc2(&gb, dscf_vlc.table, MPC7_DSCF_BITS, 1) - 7;
	bands[i].scf_idx[ch][1] = (t == 8) ? get_bits(&gb, 6) : (bands[i].scf_idx[ch][0] + t);
	bands[i].scf_idx[ch][2] = bands[i].scf_idx[ch][1];
	break;
	case 2:
	bands[i].scf_idx[ch][1] = bands[i].scf_idx[ch][0];
	t = get_vlc2(&gb, dscf_vlc.table, MPC7_DSCF_BITS, 1) - 7;
	bands[i].scf_idx[ch][2] = (t == 8) ? get_bits(&gb, 6) : (bands[i].scf_idx[ch][1] + t);
	break;
	case 3:
	bands[i].scf_idx[ch][2] = bands[i].scf_idx[ch][1] = bands[i].scf_idx[ch][0];
	break;
	}
	c->oldDSCF[ch][i] = bands[i].scf_idx[ch][2];
	}
	}
	}
	/* get quantizers */
	memset(c->Q, 0, sizeof(c->Q));
	off = 0;
	for(i = 0; i < BANDS; i++, off += SAMPLES_PER_BAND)
	for(ch = 0; ch < 2; ch++)
	idx_to_quant(c, &gb, bands[i].res[ch], c->Q[ch] + off);

	ff_mpc_dequantize_and_synth(c, mb, data);

	av_free(bits);

	bits_used = get_bits_count(&gb);
	bits_avail = (buf_size - 4) * 8;
	if(!buf[1] && ((bits_avail < bits_used) \|\| (bits_used + 32 <= bits_avail))){
	av_log(NULL,0, "Error decoding frame: used %i of %i bits\n", bits_used, bits_avail);
	return -1;
	}
	if(c->frames_to_skip){
	c->frames_to_skip--;
	*data_size = 0;
	return buf_size;
	}
	*data_size = out_size;

	return buf_size;
	}

	static void mpc7_decode_flush(AVCodecContext *avctx)
	{
	MPCContext *c = avctx->priv_data;

	memset(c->oldDSCF, 0, sizeof(c->oldDSCF));
	c->frames_to_skip = 32;
	}

	AVCodec mpc7_decoder = {
	"mpc7",
	CODEC_TYPE_AUDIO,
	CODEC_ID_MUSEPACK7,
	sizeof(MPCContext),
	mpc7_decode_init,
	NULL,
	NULL,
	mpc7_decode_frame,
	.flush = mpc7_decode_flush,
	.long_name = NULL_IF_CONFIG_SMALL("Musepack SV7"),
	};