* Musepack SV7 decoder
* Copyright (c) 2006 Konstantin Shishkov
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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,
+ * Libav 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
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
- * @file mpc7.c Musepack SV7 decoder
+ * @file
* MPEG Audio Layer 1/2 -like codec with frames of 1152 samples
* divided into 32 subbands.
*/
-#include "libavutil/random.h"
+#include "libavutil/channel_layout.h"
+#include "libavutil/internal.h"
+#include "libavutil/lfg.h"
#include "avcodec.h"
-#include "bitstream.h"
-#include "dsputil.h"
-
-#ifdef CONFIG_MPEGAUDIO_HP
-#define USE_HIGHPRECISION
-#endif
-#include "mpegaudio.h"
+#include "get_bits.h"
+#include "internal.h"
+#include "mpegaudiodsp.h"
#include "mpc.h"
#include "mpc7data.h"
static VLC scfi_vlc, dscf_vlc, hdr_vlc, quant_vlc[MPC7_QUANT_VLC_TABLES][2];
+static const uint16_t quant_offsets[MPC7_QUANT_VLC_TABLES*2 + 1] =
+{
+ 0, 512, 1024, 1536, 2052, 2564, 3076, 3588, 4100, 4612, 5124,
+ 5636, 6164, 6676, 7224
+};
+
+
static av_cold int mpc7_decode_init(AVCodecContext * avctx)
{
int i, j;
MPCContext *c = avctx->priv_data;
GetBitContext gb;
- uint8_t buf[16];
+ LOCAL_ALIGNED_16(uint8_t, buf, [16]);
static int vlc_initialized = 0;
+ static VLC_TYPE scfi_table[1 << MPC7_SCFI_BITS][2];
+ static VLC_TYPE dscf_table[1 << MPC7_DSCF_BITS][2];
+ static VLC_TYPE hdr_table[1 << MPC7_HDR_BITS][2];
+ static VLC_TYPE quant_tables[7224][2];
+
+ /* Musepack SV7 is always stereo */
+ if (avctx->channels != 2) {
+ avpriv_request_sample(avctx, "%d channels", avctx->channels);
+ return AVERROR_PATCHWELCOME;
+ }
+
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_init_random(0xDEADBEEF, &c->rnd);
- dsputil_init(&c->dsp, avctx);
- c->dsp.bswap_buf((uint32_t*)buf, (const uint32_t*)avctx->extradata, 4);
+ av_lfg_init(&c->rnd, 0xDEADBEEF);
+ ff_bswapdsp_init(&c->bdsp);
+ ff_mpadsp_init(&c->mpadsp);
+ c->bdsp.bswap_buf((uint32_t *) buf, (const uint32_t *) avctx->extradata, 4);
ff_mpc_init();
init_get_bits(&gb, buf, 128);
av_log(avctx, AV_LOG_ERROR, "Too many bands: %i\n", c->maxbands);
return -1;
}
- skip_bits(&gb, 88);
+ skip_bits_long(&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;
+ avctx->sample_fmt = AV_SAMPLE_FMT_S16P;
+ avctx->channel_layout = AV_CH_LAYOUT_STEREO;
+
if(vlc_initialized) return 0;
av_log(avctx, AV_LOG_DEBUG, "Initing VLC\n");
+ scfi_vlc.table = scfi_table;
+ scfi_vlc.table_allocated = 1 << MPC7_SCFI_BITS;
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)){
+ &mpc7_scfi[0], 2, 1, INIT_VLC_USE_NEW_STATIC)){
av_log(avctx, AV_LOG_ERROR, "Cannot init SCFI VLC\n");
return -1;
}
+ dscf_vlc.table = dscf_table;
+ dscf_vlc.table_allocated = 1 << MPC7_DSCF_BITS;
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)){
+ &mpc7_dscf[0], 2, 1, INIT_VLC_USE_NEW_STATIC)){
av_log(avctx, AV_LOG_ERROR, "Cannot init DSCF VLC\n");
return -1;
}
+ hdr_vlc.table = hdr_table;
+ hdr_vlc.table_allocated = 1 << MPC7_HDR_BITS;
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)){
+ &mpc7_hdr[0], 2, 1, INIT_VLC_USE_NEW_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++){
+ quant_vlc[i][j].table = &quant_tables[quant_offsets[i*2 + j]];
+ quant_vlc[i][j].table_allocated = quant_offsets[i*2 + j + 1] - quant_offsets[i*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)){
+ &mpc7_quant_vlc[i][j][0], 4, 2, INIT_VLC_USE_NEW_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;
}
switch(idx){
case -1:
for(i = 0; i < SAMPLES_PER_BAND; i++){
- *dst++ = (av_random(&c->rnd) & 0x3FC) - 510;
+ *dst++ = (av_lfg_get(&c->rnd) & 0x3FC) - 510;
}
break;
case 1:
}
}
-static int mpc7_decode_frame(AVCodecContext * avctx,
- void *data, int *data_size,
- const uint8_t * buf, int buf_size)
+static int get_scale_idx(GetBitContext *gb, int ref)
+{
+ int t = get_vlc2(gb, dscf_vlc.table, MPC7_DSCF_BITS, 1) - 7;
+ if (t == 8)
+ return get_bits(gb, 6);
+ return av_clip_uintp2(ref + t, 7);
+}
+
+static int mpc7_decode_frame(AVCodecContext * avctx, void *data,
+ int *got_frame_ptr, AVPacket *avpkt)
{
+ AVFrame *frame = data;
+ const uint8_t *buf = avpkt->data;
+ int buf_size;
MPCContext *c = avctx->priv_data;
GetBitContext gb;
- uint8_t *bits;
- int i, ch, t;
+ int i, ch;
int mb = -1;
Band *bands = c->bands;
- int off;
+ int off, ret, last_frame, skip;
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);
+ memset(bands, 0, sizeof(*bands) * (c->maxbands + 1));
+
+ buf_size = avpkt->size & ~3;
+ if (buf_size <= 0) {
+ av_log(avctx, AV_LOG_ERROR, "packet size is too small (%i bytes)\n",
+ avpkt->size);
+ return AVERROR_INVALIDDATA;
+ }
+ if (buf_size != avpkt->size) {
+ av_log(avctx, AV_LOG_WARNING, "packet size is not a multiple of 4. "
+ "extra bytes at the end will be skipped.\n");
+ }
+
+ skip = buf[0];
+ last_frame = buf[1];
+ buf += 4;
+ buf_size -= 4;
+
+ /* get output buffer */
+ frame->nb_samples = last_frame ? c->lastframelen : MPC_FRAME_SIZE;
+ if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) {
+ av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+ return ret;
}
- 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]);
+ av_fast_padded_malloc(&c->bits, &c->buf_size, buf_size);
+ if (!c->bits)
+ return AVERROR(ENOMEM);
+ c->bdsp.bswap_buf((uint32_t *) c->bits, (const uint32_t *) buf,
+ buf_size >> 2);
+ init_get_bits(&gb, c->bits, buf_size * 8);
+ skip_bits_long(&gb, skip);
/* read subband indexes */
for(i = 0; i <= c->maxbands; i++){
for(ch = 0; ch < 2; ch++){
+ int t = 4;
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(t == 4) bands[i].res[ch] = get_bits(&gb, 4);
+ else bands[i].res[ch] = av_clip(bands[i-1].res[ch] + t, 0, 17);
}
if(bands[i].res[0] || bands[i].res[1]){
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);
+ bands[i].scf_idx[ch][0] = get_scale_idx(&gb, bands[i].scf_idx[ch][2]);
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);
+ bands[i].scf_idx[ch][1] = get_scale_idx(&gb, bands[i].scf_idx[ch][0]);
+ bands[i].scf_idx[ch][2] = get_scale_idx(&gb, bands[i].scf_idx[ch][1]);
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][1] = get_scale_idx(&gb, bands[i].scf_idx[ch][0]);
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);
+ bands[i].scf_idx[ch][2] = get_scale_idx(&gb, bands[i].scf_idx[ch][1]);
break;
case 3:
bands[i].scf_idx[ch][2] = bands[i].scf_idx[ch][1] = bands[i].scf_idx[ch][0];
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);
+ ff_mpc_dequantize_and_synth(c, mb, (int16_t **)frame->extended_data, 2);
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);
+ bits_avail = buf_size * 8;
+ if (!last_frame && ((bits_avail < bits_used) || (bits_used + 32 <= bits_avail))) {
+ av_log(avctx, AV_LOG_ERROR, "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;
+ *got_frame_ptr = 0;
+ return avpkt->size;
}
- *data_size = (buf[1] ? c->lastframelen : MPC_FRAME_SIZE) * 4;
- return buf_size;
+ *got_frame_ptr = 1;
+
+ return avpkt->size;
}
static void mpc7_decode_flush(AVCodecContext *avctx)
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"),
+static av_cold int mpc7_decode_close(AVCodecContext *avctx)
+{
+ MPCContext *c = avctx->priv_data;
+ av_freep(&c->bits);
+ c->buf_size = 0;
+ return 0;
+}
+
+AVCodec ff_mpc7_decoder = {
+ .name = "mpc7",
+ .long_name = NULL_IF_CONFIG_SMALL("Musepack SV7"),
+ .type = AVMEDIA_TYPE_AUDIO,
+ .id = AV_CODEC_ID_MUSEPACK7,
+ .priv_data_size = sizeof(MPCContext),
+ .init = mpc7_decode_init,
+ .close = mpc7_decode_close,
+ .decode = mpc7_decode_frame,
+ .flush = mpc7_decode_flush,
+ .capabilities = CODEC_CAP_DR1,
+ .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_S16P,
+ AV_SAMPLE_FMT_NONE },
};
projects / ffmpeg / blobdiff