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AAC support in the SDP generator

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Originally committed as revision 10398 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Luca Abeni 2007-09-05 06:30:59 +00:00
parent c92a30bb06
commit 4901263abd
1 changed files with 42 additions and 13 deletions
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55
libavformat/sdp.c
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@ -110,6 +110,27 @@ static char *data_to_hex(char *buff, const uint8_t *src, int s)
return buff;
}
static char *extradata2config(const uint8_t *extradata, int extradata_size)
{
char *config;
if (extradata_size > MAX_EXTRADATA_SIZE) {
av_log(NULL, AV_LOG_ERROR, "Too many extra data!\n");
return NULL;
}
config = av_malloc(10 + extradata_size * 2);
if (config == NULL) {
av_log(NULL, AV_LOG_ERROR, "Cannot allocate memory for the config info\n");
return NULL;
}
memcpy(config, "; config=", 9);
data_to_hex(config + 9, extradata, extradata_size);
config[9 + extradata_size * 2] = 0;
return config;
}
static char *sdp_media_attributes(char *buff, int size, AVCodecContext *c, int payload_type)
{
char *config = NULL;
@ -117,25 +138,33 @@ static char *sdp_media_attributes(char *buff, int size, AVCodecContext *c, int p
switch (c->codec_id) {
case CODEC_ID_MPEG4:
if (c->flags & CODEC_FLAG_GLOBAL_HEADER) {
if (c->extradata_size > MAX_EXTRADATA_SIZE) {
av_log(NULL, AV_LOG_ERROR, "Too many extra data!\n");
return NULL;
}
config = av_malloc(10 + c->extradata_size * 2);
if (config == NULL) {
av_log(NULL, AV_LOG_ERROR, "Cannot allocate memory for the config info\n");
return NULL;
}
memcpy(config, "; config=", 9);
data_to_hex(config + 9, c->extradata, c->extradata_size);
config[9 + c->extradata_size * 2] = 0;
config = extradata2config(c->extradata, c->extradata_size);
}
av_strlcatf(buff, size, "a=rtpmap:%d MP4V-ES/90000\r\n"
"a=fmtp:%d profile-level-id=1%s\r\n",
payload_type,
payload_type, config ? config : "");
break;
case CODEC_ID_AAC:
if (c->flags & CODEC_FLAG_GLOBAL_HEADER) {
config = extradata2config(c->extradata, c->extradata_size);
} else {
/* FIXME: maybe we can forge config information based on the
* codec parameters...
*/
av_log(NULL, AV_LOG_ERROR, "AAC with no global headers is currently not supported\n");
return NULL;
}
if (config == NULL) {
return NULL;
}
av_strlcatf(buff, size, "a=rtpmap:%d MPEG4-GENERIC/%d/%d\r\n"
"a=fmtp:%d profile-level-id=1;"
"mode=AAC-hbr;sizelength=13;indexlength=3;"
"indexdeltalength=3%s\r\n",
payload_type, c->sample_rate, c->channels,
payload_type, config);
break;
default:
/* Nothing special to do, here... */
break;