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rtp: set the payload type as stream id

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Support multiple video/audio streams with different format in the
same session.

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
This commit is contained in:
Luca Barbato 2012-11-11 20:44:28 +01:00
parent 3b4296f414
commit 8034130e06
12 changed files with 66 additions and 26 deletions
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3
libavformat/avformat.h
View File

@ -1684,6 +1684,9 @@ int av_filename_number_test(const char *filename);
/**
* Generate an SDP for an RTP session.
*
* Note, this overwrites the id values of AVStreams in the muxer contexts
* for getting unique dynamic payload types.
*
* @param ac array of AVFormatContexts describing the RTP streams. If the
* array is composed by only one context, such context can contain
* multiple AVStreams (one AVStream per RTP stream). Otherwise,

5
libavformat/internal.h
View File

@ -124,7 +124,8 @@ int ff_url_join(char *str, int size, const char *proto,
*
* @param buff the buffer to append the SDP fragment to
* @param size the size of the buff buffer
* @param c the AVCodecContext of the media to describe
* @param st the AVStream of the media to describe
* @param idx the global stream index
* @param dest_addr the destination address of the media stream, may be NULL
* @param dest_type the destination address type, may be NULL
* @param port the destination port of the media stream, 0 if unknown
@ -132,7 +133,7 @@ int ff_url_join(char *str, int size, const char *proto,
* @param fmt the AVFormatContext, which might contain options modifying
* the generated SDP
*/
void ff_sdp_write_media(char *buff, int size, AVCodecContext *c,
void ff_sdp_write_media(char *buff, int size, AVStream *st, int idx,
const char *dest_addr, const char *dest_type,
int port, int ttl, AVFormatContext *fmt);

11
libavformat/movenc.c
View File

@ -1536,13 +1536,16 @@ static int mov_write_uuid_tag_psp(AVIOContext *pb, MOVTrack *mov)
return 0x34;
}
static int mov_write_udta_sdp(AVIOContext *pb, AVFormatContext *ctx, int index)
static int mov_write_udta_sdp(AVIOContext *pb, MOVTrack *track)
{
AVFormatContext *ctx = track->rtp_ctx;
char buf[1000] = "";
int len;
ff_sdp_write_media(buf, sizeof(buf), ctx->streams[0]->codec, NULL, NULL, 0, 0, ctx);
av_strlcatf(buf, sizeof(buf), "a=control:streamid=%d\r\n", index);
ff_sdp_write_media(buf, sizeof(buf), ctx->streams[0], track->src_track,
NULL, NULL, 0, 0, ctx);
av_strlcatf(buf, sizeof(buf), "a=control:streamid=%d\r\n", track->track_id);
len = strlen(buf);
avio_wb32(pb, len + 24);
@ -1573,7 +1576,7 @@ static int mov_write_trak_tag(AVIOContext *pb, MOVMuxContext *mov,
if (track->mode == MODE_PSP)
mov_write_uuid_tag_psp(pb,track); // PSP Movies require this uuid box
if (track->tag == MKTAG('r','t','p',' '))
mov_write_udta_sdp(pb, track->rtp_ctx, track->track_id);
mov_write_udta_sdp(pb, track);
if (track->enc->codec_type == AVMEDIA_TYPE_VIDEO && track->mode == MODE_MOV) {
double sample_aspect_ratio = av_q2d(st->sample_aspect_ratio);
if (0.0 != sample_aspect_ratio && 1.0 != sample_aspect_ratio)

2
libavformat/movenchint.c
View File

@ -44,7 +44,7 @@ int ff_mov_init_hinting(AVFormatContext *s, int index, int src_index)
track->enc->codec_tag = track->tag;
ret = ff_rtp_chain_mux_open(&track->rtp_ctx, s, src_st, NULL,
RTP_MAX_PACKET_SIZE);
RTP_MAX_PACKET_SIZE, src_index);
if (ret < 0)
goto fail;

8
libavformat/rtp.c
View File

@ -90,7 +90,8 @@ int ff_rtp_get_codec_info(AVCodecContext *codec, int payload_type)
return -1;
}
int ff_rtp_get_payload_type(AVFormatContext *fmt, AVCodecContext *codec)
int ff_rtp_get_payload_type(AVFormatContext *fmt,
AVCodecContext *codec, int idx)
{
int i;
AVOutputFormat *ofmt = fmt ? fmt->oformat : NULL;
@ -124,8 +125,11 @@ int ff_rtp_get_payload_type(AVFormatContext *fmt, AVCodecContext *codec)
return AVRtpPayloadTypes[i].pt;
}
if (idx < 0)
idx = codec->codec_type == AVMEDIA_TYPE_AUDIO;
/* dynamic payload type */
return RTP_PT_PRIVATE + (codec->codec_type == AVMEDIA_TYPE_AUDIO);
return RTP_PT_PRIVATE + idx;
}
const char *ff_rtp_enc_name(int payload_type)

9
libavformat/rtp.h
View File

@ -25,13 +25,18 @@
#include "libavcodec/avcodec.h"
/**
* Return the payload type for a given codec used in the given format context.
* Return the payload type for a given stream used in the given format context.
* Static payload types are derived from the codec.
* Dynamic payload type are derived from the id field in AVStream.
* The format context private option payload_type overrides both.
*
* @param fmt The context of the format
* @param codec The context of the codec
* @param idx The stream index
* @return The payload type (the 'PT' field in the RTP header).
*/
int ff_rtp_get_payload_type(AVFormatContext *fmt, AVCodecContext *codec);
int ff_rtp_get_payload_type(AVFormatContext *fmt, AVCodecContext *codec,
int idx);
/**
* Initialize a codec context based on the payload type.

13
libavformat/rtpenc.c
View File

@ -101,8 +101,17 @@ static int rtp_write_header(AVFormatContext *s1)
return -1;
}
if (s->payload_type < 0)
s->payload_type = ff_rtp_get_payload_type(s1, st->codec);
if (s->payload_type < 0) {
/* Re-validate non-dynamic payload types */
if (st->id < RTP_PT_PRIVATE)
st->id = ff_rtp_get_payload_type(s1, st->codec, -1);
s->payload_type = st->id;
} else {
/* private option takes priority */
st->id = s->payload_type;
}
s->base_timestamp = av_get_random_seed();
s->timestamp = s->base_timestamp;
s->cur_timestamp = 0;

12
libavformat/rtpenc_chain.c
View File

@ -23,13 +23,15 @@
#include "avio_internal.h"
#include "rtpenc_chain.h"
#include "avio_internal.h"
#include "rtp.h"
#include "libavutil/opt.h"
int ff_rtp_chain_mux_open(AVFormatContext **out, AVFormatContext *s,
AVStream *st, URLContext *handle, int packet_size)
AVStream *st, URLContext *handle, int packet_size,
int idx)
{
AVFormatContext *rtpctx = NULL;
int ret;
int ret, pt;
AVOutputFormat *rtp_format = av_guess_format("rtp", NULL, NULL);
uint8_t *rtpflags;
AVDictionary *opts = NULL;
@ -57,6 +59,12 @@ int ff_rtp_chain_mux_open(AVFormatContext **out, AVFormatContext *s,
rtpctx->max_delay = s->max_delay;
/* Copy other stream parameters. */
rtpctx->streams[0]->sample_aspect_ratio = st->sample_aspect_ratio;
/* Get the payload type from the codec */
if (st->id < RTP_PT_PRIVATE)
rtpctx->streams[0]->id =
ff_rtp_get_payload_type(rtpctx, st->codec, idx);
else
rtpctx->streams[0]->id = st->id;
if (av_opt_get(s, "rtpflags", AV_OPT_SEARCH_CHILDREN, &rtpflags) >= 0)
av_dict_set(&opts, "rtpflags", rtpflags, AV_DICT_DONT_STRDUP_VAL);

3
libavformat/rtpenc_chain.h
View File

@ -26,6 +26,7 @@
#include "url.h"
int ff_rtp_chain_mux_open(AVFormatContext **out, AVFormatContext *s,
AVStream *st, URLContext *handle, int packet_size);
AVStream *st, URLContext *handle, int packet_size,
int id);
#endif /* AVFORMAT_RTPENC_CHAIN_H */

3
libavformat/rtsp.c
View File

@ -630,7 +630,8 @@ int ff_rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
if (s->oformat && CONFIG_RTSP_MUXER) {
int ret = ff_rtp_chain_mux_open(&rtsp_st->transport_priv, s, st,
rtsp_st->rtp_handle,
RTSP_TCP_MAX_PACKET_SIZE);
RTSP_TCP_MAX_PACKET_SIZE,
rtsp_st->stream_index);
/* Ownership of rtp_handle is passed to the rtp mux context */
rtsp_st->rtp_handle = NULL;
if (ret < 0)

2
libavformat/sapenc.c
View File

@ -151,7 +151,7 @@ static int sap_write_header(AVFormatContext *s)
ret = AVERROR(EIO);
goto fail;
}
ret = ff_rtp_chain_mux_open(&contexts[i], s, s->streams[i], fd, 0);
ret = ff_rtp_chain_mux_open(&contexts[i], s, s->streams[i], fd, 0, i);
if (ret < 0)
goto fail;
s->streams[i]->priv_data = contexts[i];

21
libavformat/sdp.c
View File

@ -590,12 +590,15 @@ static char *sdp_write_media_attributes(char *buff, int size, AVCodecContext *c,
return buff;
}
void ff_sdp_write_media(char *buff, int size, AVCodecContext *c, const char *dest_addr, const char *dest_type, int port, int ttl, AVFormatContext *fmt)
void ff_sdp_write_media(char *buff, int size, AVStream *st, int idx,
const char *dest_addr, const char *dest_type,
int port, int ttl, AVFormatContext *fmt)
{
AVCodecContext *c = st->codec;
const char *type;
int payload_type;
payload_type = ff_rtp_get_payload_type(fmt, c);
payload_type = ff_rtp_get_payload_type(fmt, c, idx);
switch (c->codec_type) {
case AVMEDIA_TYPE_VIDEO : type = "video" ; break;
@ -617,7 +620,7 @@ int av_sdp_create(AVFormatContext *ac[], int n_files, char *buf, int size)
{
AVDictionaryEntry *title = av_dict_get(ac[0]->metadata, "title", NULL, 0);
struct sdp_session_level s = { 0 };
int i, j, port, ttl, is_multicast;
int i, j, port, ttl, is_multicast, index = 0;
char dst[32], dst_type[5];
memset(buf, 0, size);
@ -656,10 +659,10 @@ int av_sdp_create(AVFormatContext *ac[], int n_files, char *buf, int size)
ttl = 0;
}
for (j = 0; j < ac[i]->nb_streams; j++) {
ff_sdp_write_media(buf, size,
ac[i]->streams[j]->codec, dst[0] ? dst : NULL,
dst_type, (port > 0) ? port + j * 2 : 0, ttl,
ac[i]);
ff_sdp_write_media(buf, size, ac[i]->streams[j], index++,
dst[0] ? dst : NULL, dst_type,
(port > 0) ? port + j * 2 : 0,
ttl, ac[i]);
if (port <= 0) {
av_strlcatf(buf, size,
"a=control:streamid=%d\r\n", i + j);
@ -675,7 +678,9 @@ int av_sdp_create(AVFormatContext *ac[], int n_files, char *buf, int size)
return AVERROR(ENOSYS);
}
void ff_sdp_write_media(char *buff, int size, AVCodecContext *c, const char *dest_addr, const char *dest_type, int port, int ttl, AVFormatContext *fmt)
void ff_sdp_write_media(char *buff, int size, AVStream *st, int idx,
const char *dest_addr, const char *dest_type,
int port, int ttl, AVFormatContext *fmt)
{
}
#endif