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rtpenc: Allow requesting H264 RTP packetization mode 0

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This requires all NAL units to fit within single RTP packets. It
doesn't change the actual packetization for packets that fit, but
errors out and gives a helpful hint if the NAL units would have to
be split, and signals the right packetization mode in the SDP.

Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Martin Storsjö 2012-05-28 12:11:26 +03:00
parent becc3c629b
commit d77f4afa98
4 changed files with 17 additions and 4 deletions
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2
libavformat/rtpenc.h
View File

@ -66,12 +66,14 @@ typedef struct RTPMuxContext RTPMuxContext;
#define FF_RTP_FLAG_MP4A_LATM 1
#define FF_RTP_FLAG_RFC2190 2
#define FF_RTP_FLAG_SKIP_RTCP 4
#define FF_RTP_FLAG_H264_MODE0 8
#define FF_RTP_FLAG_OPTS(ctx, fieldname) \
{ "rtpflags", "RTP muxer flags", offsetof(ctx, fieldname), AV_OPT_TYPE_FLAGS, {.dbl = 0}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "rtpflags" }, \
{ "latm", "Use MP4A-LATM packetization instead of MPEG4-GENERIC for AAC", 0, AV_OPT_TYPE_CONST, {.dbl = FF_RTP_FLAG_MP4A_LATM}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "rtpflags" }, \
{ "rfc2190", "Use RFC 2190 packetization instead of RFC 4629 for H.263", 0, AV_OPT_TYPE_CONST, {.dbl = FF_RTP_FLAG_RFC2190}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "rtpflags" }, \
{ "skip_rtcp", "Don't send RTCP sender reports", 0, AV_OPT_TYPE_CONST, {.dbl = FF_RTP_FLAG_SKIP_RTCP}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "rtpflags" }, \
{ "h264_mode0", "Use mode 0 for H264 in RTP", 0, AV_OPT_TYPE_CONST, {.dbl = FF_RTP_FLAG_H264_MODE0}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "rtpflags" }, \
void ff_rtp_send_data(AVFormatContext *s1, const uint8_t *buf1, int len, int m);

6
libavformat/rtpenc_h264.c
View File

@ -55,6 +55,12 @@ static void nal_send(AVFormatContext *s1, const uint8_t *buf, int size, int last
uint8_t type = buf[0] & 0x1F;
uint8_t nri = buf[0] & 0x60;
if (s->flags & FF_RTP_FLAG_H264_MODE0) {
av_log(s1, AV_LOG_ERROR,
"NAL size %d > %d, try -slice-max-size %d\n", size,
s->max_payload_size, s->max_payload_size);
return;
}
av_log(s1, AV_LOG_DEBUG, "NAL size %d > %d\n", size, s->max_payload_size);
s->buf[0] = 28; /* FU Indicator; Type = 28 ---> FU-A */
s->buf[0] |= nri;

11
libavformat/sdp.c
View File

@ -388,15 +388,20 @@ static char *sdp_write_media_attributes(char *buff, int size, AVCodecContext *c,
char *config = NULL;
switch (c->codec_id) {
case CODEC_ID_H264:
case CODEC_ID_H264: {
int mode = 1;
if (fmt && fmt->oformat->priv_class &&
av_opt_flag_is_set(fmt->priv_data, "rtpflags", "h264_mode0"))
mode = 0;
if (c->extradata_size) {
config = extradata2psets(c);
}
av_strlcatf(buff, size, "a=rtpmap:%d H264/90000\r\n"
"a=fmtp:%d packetization-mode=1%s\r\n",
"a=fmtp:%d packetization-mode=%d%s\r\n",
payload_type,
payload_type, config ? config : "");
payload_type, mode, config ? config : "");
break;
}
case CODEC_ID_H263:
case CODEC_ID_H263P:
/* a=framesize is required by 3GPP TS 26.234 (PSS). It

2
libavformat/version.h
View File

@ -31,7 +31,7 @@
#define LIBAVFORMAT_VERSION_MAJOR 54
#define LIBAVFORMAT_VERSION_MINOR 4
#define LIBAVFORMAT_VERSION_MICRO 0
#define LIBAVFORMAT_VERSION_MICRO 1
#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
LIBAVFORMAT_VERSION_MINOR, \