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In ts demuxer, support aac flexmux using extradata in iods, issue #2346

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Originally committed as revision 25806 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Baptiste Coudurier
2010-11-23 00:51:12 +00:00
parent 91360ce61d
commit 798c6facb7
5 changed files with 157 additions and 82 deletions
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84
libavformat/mov.c
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@@ -31,8 +31,6 @@
#include "avformat.h"
#include "riff.h"
#include "isom.h"
#include "libavcodec/mpeg4audio.h"
#include "libavcodec/mpegaudiodata.h"
#include "libavcodec/get_bits.h"
#if CONFIG_ZLIB
@@ -462,41 +460,6 @@ static int mov_read_hdlr(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
return 0;
}
int ff_mp4_read_descr_len(ByteIOContext *pb)
{
int len = 0;
int count = 4;
while (count--) {
int c = get_byte(pb);
len = (len << 7) | (c & 0x7f);
if (!(c & 0x80))
break;
}
return len;
}
static int mp4_read_descr(AVFormatContext *fc, ByteIOContext *pb, int *tag)
{
int len;
*tag = get_byte(pb);
len = ff_mp4_read_descr_len(pb);
dprintf(fc, "MPEG4 description: tag=0x%02x len=%d\n", *tag, len);
return len;
}
#define MP4ESDescrTag 0x03
#define MP4DecConfigDescrTag 0x04
#define MP4DecSpecificDescrTag 0x05
static const AVCodecTag mp4_audio_types[] = {
{ CODEC_ID_MP3ON4, AOT_PS }, /* old mp3on4 draft */
{ CODEC_ID_MP3ON4, AOT_L1 }, /* layer 1 */
{ CODEC_ID_MP3ON4, AOT_L2 }, /* layer 2 */
{ CODEC_ID_MP3ON4, AOT_L3 }, /* layer 3 */
{ CODEC_ID_MP4ALS, AOT_ALS }, /* MPEG-4 ALS */
{ CODEC_ID_NONE, AOT_NULL },
};
int ff_mov_read_esds(AVFormatContext *fc, ByteIOContext *pb, MOVAtom atom)
{
AVStream *st;
@@ -507,55 +470,16 @@ int ff_mov_read_esds(AVFormatContext *fc, ByteIOContext *pb, MOVAtom atom)
st = fc->streams[fc->nb_streams-1];
get_be32(pb); /* version + flags */
len = mp4_read_descr(fc, pb, &tag);
len = ff_mp4_read_descr(fc, pb, &tag);
if (tag == MP4ESDescrTag) {
get_be16(pb); /* ID */
get_byte(pb); /* priority */
} else
get_be16(pb); /* ID */
len = mp4_read_descr(fc, pb, &tag);
if (tag == MP4DecConfigDescrTag) {
int object_type_id = get_byte(pb);
get_byte(pb); /* stream type */
get_be24(pb); /* buffer size db */
get_be32(pb); /* max bitrate */
get_be32(pb); /* avg bitrate */
st->codec->codec_id= ff_codec_get_id(ff_mp4_obj_type, object_type_id);
dprintf(fc, "esds object type id 0x%02x\n", object_type_id);
len = mp4_read_descr(fc, pb, &tag);
if (tag == MP4DecSpecificDescrTag) {
dprintf(fc, "Specific MPEG4 header len=%d\n", len);
if((uint64_t)len > (1<<30))
return -1;
av_free(st->codec->extradata);
st->codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
if (!st->codec->extradata)
return AVERROR(ENOMEM);
get_buffer(pb, st->codec->extradata, len);
st->codec->extradata_size = len;
if (st->codec->codec_id == CODEC_ID_AAC) {
MPEG4AudioConfig cfg;
ff_mpeg4audio_get_config(&cfg, st->codec->extradata,
st->codec->extradata_size);
st->codec->channels = cfg.channels;
if (cfg.object_type == 29 && cfg.sampling_index < 3) // old mp3on4
st->codec->sample_rate = ff_mpa_freq_tab[cfg.sampling_index];
else if (cfg.ext_sample_rate)
st->codec->sample_rate = cfg.ext_sample_rate;
else
st->codec->sample_rate = cfg.sample_rate;
dprintf(fc, "mp4a config channels %d obj %d ext obj %d "
"sample rate %d ext sample rate %d\n", st->codec->channels,
cfg.object_type, cfg.ext_object_type,
cfg.sample_rate, cfg.ext_sample_rate);
if (!(st->codec->codec_id = ff_codec_get_id(mp4_audio_types,
cfg.object_type)))
st->codec->codec_id = CODEC_ID_AAC;
}
}
}
len = ff_mp4_read_descr(fc, pb, &tag);
if (tag == MP4DecConfigDescrTag)
ff_mp4_read_dec_config_descr(fc, st, pb);
return 0;
}