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rtpenc: Support packetizing iLBC 

Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Martin Storsjö 2012-06-17 17:25:46 +03:00
parent 89c3960544
commit 579fd87b46
3 changed files with 51 additions and 1 deletions
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44
libavformat/rtpenc.c
View File

@ -74,6 +74,7 @@ static int is_supported(enum CodecID id)
case CODEC_ID_VP8:
case CODEC_ID_ADPCM_G722:
case CODEC_ID_ADPCM_G726:
case CODEC_ID_ILBC:
return 1;
default:
return 0;
@ -187,6 +188,16 @@ static int rtp_write_header(AVFormatContext *s1)
* 8000, even if the sample rate is 16000. See RFC 3551. */
avpriv_set_pts_info(st, 32, 1, 8000);
break;
case CODEC_ID_ILBC:
if (st->codec->block_align != 38 && st->codec->block_align != 50) {
av_log(s1, AV_LOG_ERROR, "Incorrect iLBC block size specified\n");
goto fail;
}
if (!s->max_frames_per_packet)
s->max_frames_per_packet = 1;
s->max_frames_per_packet = FFMIN(s->max_frames_per_packet,
s->max_payload_size / st->codec->block_align);
goto defaultcase;
case CODEC_ID_AMR_NB:
case CODEC_ID_AMR_WB:
if (!s->max_frames_per_packet)
@ -395,6 +406,36 @@ static void rtp_send_mpegts_raw(AVFormatContext *s1,
}
}
static int rtp_send_ilbc(AVFormatContext *s1, const uint8_t *buf, int size)
{
RTPMuxContext *s = s1->priv_data;
AVStream *st = s1->streams[0];
int frame_duration = av_get_audio_frame_duration(st->codec, 0);
int frame_size = st->codec->block_align;
int frames = size / frame_size;
while (frames > 0) {
int n = FFMIN(s->max_frames_per_packet - s->num_frames, frames);
if (!s->num_frames) {
s->buf_ptr = s->buf;
s->timestamp = s->cur_timestamp;
}
memcpy(s->buf_ptr, buf, n * frame_size);
frames -= n;
s->num_frames += n;
s->buf_ptr += n * frame_size;
buf += n * frame_size;
s->cur_timestamp += n * frame_duration;
if (s->num_frames == s->max_frames_per_packet) {
ff_rtp_send_data(s1, s->buf, s->buf_ptr - s->buf, 1);
s->num_frames = 0;
}
}
return 0;
}
static int rtp_write_packet(AVFormatContext *s1, AVPacket *pkt)
{
RTPMuxContext *s = s1->priv_data;
@ -483,6 +524,9 @@ static int rtp_write_packet(AVFormatContext *s1, AVPacket *pkt)
case CODEC_ID_VP8:
ff_rtp_send_vp8(s1, pkt->data, size);
break;
case CODEC_ID_ILBC:
rtp_send_ilbc(s1, pkt->data, size);
break;
default:
/* better than nothing : send the codec raw data */
rtp_send_raw(s1, pkt->data, size);

6
libavformat/sdp.c
View File

@ -549,6 +549,12 @@ static char *sdp_write_media_attributes(char *buff, int size, AVCodecContext *c,
c->sample_rate);
break;
}
case CODEC_ID_ILBC:
av_strlcatf(buff, size, "a=rtpmap:%d iLBC/%d\r\n"
"a=fmtp:%d mode=%d\r\n",
payload_type, c->sample_rate,
payload_type, c->block_align == 38 ? 20 : 30);
break;
default:
/* Nothing special to do here... */
break;

2
libavformat/version.h
View File

@ -31,7 +31,7 @@
#define LIBAVFORMAT_VERSION_MAJOR 54
#define LIBAVFORMAT_VERSION_MINOR 5
#define LIBAVFORMAT_VERSION_MICRO 1
#define LIBAVFORMAT_VERSION_MICRO 2
#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
LIBAVFORMAT_VERSION_MINOR, \