[FFmpeg-cvslog] libavformat: Move avc mp4 startcode parsing to a shared file
Martin Storsjö
git at videolan.org
Thu Sep 25 00:10:21 CEST 2014
ffmpeg | branch: master | Martin Storsjö <martin at martin.st> | Wed Sep 24 11:17:04 2014 +0300| [a2efbecc4ed12d287cf29856418c4da4a7648d95] | committer: Martin Storsjö
libavformat: Move avc mp4 startcode parsing to a shared file
Signed-off-by: Martin Storsjö <martin at martin.st>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=a2efbecc4ed12d287cf29856418c4da4a7648d95
---
libavformat/avc.c | 17 +++++++++++++++++
libavformat/avc.h | 3 +++
libavformat/rtpenc_h264.c | 19 ++-----------------
3 files changed, 22 insertions(+), 17 deletions(-)
diff --git a/libavformat/avc.c b/libavformat/avc.c
index 2fd5ac8..e639ed5 100644
--- a/libavformat/avc.c
+++ b/libavformat/avc.c
@@ -191,3 +191,20 @@ int ff_avc_write_annexb_extradata(const uint8_t *in, uint8_t **buf, int *size)
*size = out_size;
return 0;
}
+
+const uint8_t *ff_avc_mp4_find_startcode(const uint8_t *start,
+ const uint8_t *end,
+ int nal_length_size)
+{
+ unsigned int res = 0;
+
+ if (end - start < nal_length_size)
+ return NULL;
+ while (nal_length_size--)
+ res = (res << 8) | *start++;
+
+ if (res > end - start)
+ return NULL;
+
+ return start + res;
+}
diff --git a/libavformat/avc.h b/libavformat/avc.h
index 579756e..2442e5f 100644
--- a/libavformat/avc.h
+++ b/libavformat/avc.h
@@ -30,5 +30,8 @@ int ff_avc_parse_nal_units_buf(const uint8_t *buf_in, uint8_t **buf, int *size);
int ff_isom_write_avcc(AVIOContext *pb, const uint8_t *data, int len);
const uint8_t *ff_avc_find_startcode(const uint8_t *p, const uint8_t *end);
int ff_avc_write_annexb_extradata(const uint8_t *in, uint8_t **buf, int *size);
+const uint8_t *ff_avc_mp4_find_startcode(const uint8_t *start,
+ const uint8_t *end,
+ int nal_length_size);
#endif /* AVFORMAT_AVC_H */
diff --git a/libavformat/rtpenc_h264.c b/libavformat/rtpenc_h264.c
index 206d9ba..395c3a4 100644
--- a/libavformat/rtpenc_h264.c
+++ b/libavformat/rtpenc_h264.c
@@ -29,21 +29,6 @@
#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)
-{
- unsigned int res = 0;
-
- if (end - start < nal_length_size)
- return NULL;
- while (nal_length_size--)
- res = (res << 8) | *start++;
-
- if (res > end - 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;
@@ -88,14 +73,14 @@ void ff_rtp_send_h264(AVFormatContext *s1, const uint8_t *buf1, int size)
s->timestamp = s->cur_timestamp;
if (s->nal_length_size)
- r = avc_mp4_find_startcode(buf1, end, s->nal_length_size) ? buf1 : end;
+ r = ff_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;
if (s->nal_length_size) {
- r1 = avc_mp4_find_startcode(r, end, s->nal_length_size);
+ r1 = ff_avc_mp4_find_startcode(r, end, s->nal_length_size);
if (!r1)
r1 = end;
r += s->nal_length_size;
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