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

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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
libavformat/Makefile
View File

@ -138,7 +138,7 @@ OBJS-$(CONFIG_MPEG2SVCD_MUXER) += mpegenc.o
OBJS-$(CONFIG_MPEG1VIDEO_MUXER) += rawenc.o
OBJS-$(CONFIG_MPEG2VIDEO_MUXER) += rawenc.o
OBJS-$(CONFIG_MPEGPS_DEMUXER) += mpeg.o
OBJS-$(CONFIG_MPEGTS_DEMUXER) += mpegts.o
OBJS-$(CONFIG_MPEGTS_DEMUXER) += mpegts.o isom.o
OBJS-$(CONFIG_MPEGTS_MUXER) += mpegtsenc.o adtsenc.o
OBJS-$(CONFIG_MPEGVIDEO_DEMUXER) += mpegvideodec.o rawdec.o
OBJS-$(CONFIG_MPJPEG_MUXER) += mpjpeg.o

81
libavformat/isom.c
View File

@ -21,9 +21,14 @@
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
//#define DEBUG
#include "avformat.h"
#include "internal.h"
#include "isom.h"
#include "riff.h"
#include "libavcodec/mpeg4audio.h"
#include "libavcodec/mpegaudiodata.h"
/* http://www.mp4ra.org */
/* ordered by muxing preference */
@ -326,3 +331,79 @@ int ff_mov_lang_to_iso639(unsigned code, char to[4])
memcpy(to, mov_mdhd_language_map[code], 4);
return 1;
}
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;
}
int ff_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;
}
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_mp4_read_dec_config_descr(AVFormatContext *fc, AVStream *st, ByteIOContext *pb)
{
int len, tag;
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 = ff_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;
}
}
return 0;
}

8
libavformat/isom.h
View File

@ -142,6 +142,14 @@ typedef struct MOVContext {
} MOVContext;
int ff_mp4_read_descr_len(ByteIOContext *pb);
int ff_mp4_read_descr(AVFormatContext *fc, ByteIOContext *pb, int *tag);
int ff_mp4_read_dec_config_descr(AVFormatContext *fc, AVStream *st, ByteIOContext *pb);
#define MP4IODescrTag 0x02
#define MP4ESDescrTag 0x03
#define MP4DecConfigDescrTag 0x04
#define MP4DecSpecificDescrTag 0x05
int ff_mov_read_esds(AVFormatContext *fc, ByteIOContext *pb, MOVAtom atom);
enum CodecID ff_mov_get_lpcm_codec_id(int bps, int flags);

84
libavformat/mov.c
View File

@ -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;
}

64
libavformat/mpegts.c
View File

@ -30,6 +30,7 @@
#include "mpegts.h"
#include "internal.h"
#include "seek.h"
#include "isom.h"
/* 1.0 second at 24Mbit/s */
#define MAX_SCAN_PACKETS 32000
@ -852,6 +853,42 @@ static PESContext *add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid)
return pes;
}
static int mp4_read_iods(AVFormatContext *s, uint8_t *buf, unsigned size,
uint16_t *es_id, uint8_t **dec_config_descr,
int *dec_config_descr_size)
{
ByteIOContext pb;
int tag;
unsigned len;
init_put_byte(&pb, buf, size, 0, NULL, NULL, NULL, NULL);
len = ff_mp4_read_descr(s, &pb, &tag);
if (tag == MP4IODescrTag) {
get_be16(&pb); // ID
get_byte(&pb);
get_byte(&pb);
get_byte(&pb);
get_byte(&pb);
get_byte(&pb);
len = ff_mp4_read_descr(s, &pb, &tag);
if (tag == MP4ESDescrTag) {
*es_id = get_be16(&pb); /* ES_ID */
dprintf(s, "ES_ID %#x\n", *es_id);
get_byte(&pb); /* priority */
len = ff_mp4_read_descr(s, &pb, &tag);
if (tag == MP4DecConfigDescrTag) {
*dec_config_descr = av_malloc(len);
if (!*dec_config_descr)
return AVERROR(ENOMEM);
*dec_config_descr_size = len;
get_buffer(&pb, *dec_config_descr, len);
}
}
}
return 0;
}
static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
{
MpegTSContext *ts = filter->u.section_filter.opaque;
@ -863,6 +900,9 @@ static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len
int desc_list_len, desc_len, desc_tag;
char language[4];
uint32_t prog_reg_desc = 0; /* registration descriptor */
uint8_t *mp4_dec_config_descr = NULL;
int mp4_dec_config_descr_len = 0;
int mp4_es_id = 0;
#ifdef DEBUG
dprintf(ts->stream, "PMT: len %i\n", section_len);
@ -895,11 +935,20 @@ static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len
uint8_t tag, len;
tag = get8(&p, p_end);
len = get8(&p, p_end);
dprintf(ts->stream, "program tag: 0x%02x len=%d\n", tag, len);
if(len > program_info_length - 2)
//something else is broken, exit the program_descriptors_loop
break;
program_info_length -= len + 2;
if(tag == 0x05 && len >= 4) { // registration descriptor
if (tag == 0x1d) { // IOD descriptor
get8(&p, p_end); // scope
get8(&p, p_end); // label
len -= 2;
mp4_read_iods(ts->stream, p, len, &mp4_es_id,
&mp4_dec_config_descr, &mp4_dec_config_descr_len);
} else if (tag == 0x05 && len >= 4) { // registration descriptor
prog_reg_desc = bytestream_get_le32(&p);
len -= 4;
}
@ -968,6 +1017,19 @@ static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len
mpegts_find_stream_type(st, desc_tag, DESC_types);
switch(desc_tag) {
case 0x1F: /* FMC descriptor */
get16(&p, desc_end);
if (st->codec->codec_id == CODEC_ID_AAC_LATM &&
mp4_dec_config_descr_len && mp4_es_id == pid) {
ByteIOContext pb;
init_put_byte(&pb, mp4_dec_config_descr,
mp4_dec_config_descr_len, 0, NULL, NULL, NULL, NULL);
ff_mp4_read_dec_config_descr(ts->stream, st, &pb);
if (st->codec->codec_id == CODEC_ID_AAC &&
st->codec->extradata_size > 0)
st->need_parsing = 0;
}
break;
case 0x56: /* DVB teletext descriptor */
language[0] = get8(&p, desc_end);
language[1] = get8(&p, desc_end);