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rtpenc: Add support for mp4 format h264

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Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Luca Abeni 2011-12-09 11:02:55 +02:00 committed by Martin Storsjö
parent 4dbac18e2e
commit e0a3c287b4
1 changed files with 28 additions and 3 deletions
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31
libavformat/rtpenc_h264.c
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@ -29,6 +29,21 @@
#include "avc.h"
#include "rtpenc.h"
static const uint8_t *avc_mp4_find_startcode(const uint8_t *start, const uint8_t *end, int nal_length_size)
{
int res = 0;
if (end - start < nal_length_size)
return NULL;
while (nal_length_size--)
res = (res << 8) | *start++;
if (start + res > end || res < 0 || start + res < start)
return NULL;
return start + res;
}
static void nal_send(AVFormatContext *s1, const uint8_t *buf, int size, int last)
{
RTPMuxContext *s = s1->priv_data;
@ -66,12 +81,22 @@ void ff_rtp_send_h264(AVFormatContext *s1, const uint8_t *buf1, int size)
RTPMuxContext *s = s1->priv_data;
s->timestamp = s->cur_timestamp;
r = ff_avc_find_startcode(buf1, end);
if (s->nal_length_size)
r = avc_mp4_find_startcode(buf1, end, s->nal_length_size) ? buf1 : end;
else
r = ff_avc_find_startcode(buf1, end);
while (r < end) {
const uint8_t *r1;
while(!*(r++));
r1 = ff_avc_find_startcode(r, end);
if (s->nal_length_size) {
r1 = avc_mp4_find_startcode(r, end, s->nal_length_size);
if (!r1)
r1 = end;
r += s->nal_length_size;
} else {
while (!*(r++));
r1 = ff_avc_find_startcode(r, end);
}
nal_send(s1, r, r1 - r, r1 == end);
r = r1;
}