From a2efbecc4ed12d287cf29856418c4da4a7648d95 Mon Sep 17 00:00:00 2001 From: Martin Storsjö Date: Wed, 24 Sep 2014 11:17:04 +0300 Subject: libavformat: Move avc mp4 startcode parsing to a shared file MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Martin Storsjö --- libavformat/avc.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) (limited to 'libavformat/avc.c') diff --git a/libavformat/avc.c b/libavformat/avc.c index 2fd5ac807b..e639ed5593 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; +} -- cgit v1.2.3