From e0a3c287b41b0d9bb1d6e31de83a8e3ae898ba43 Mon Sep 17 00:00:00 2001 From: Luca Abeni Date: Fri, 9 Dec 2011 11:02:55 +0200 Subject: rtpenc: Add support for mp4 format h264 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Martin Storsjö --- libavformat/rtpenc_h264.c | 31 ++++++++++++++++++++++++++++--- 1 file changed, 28 insertions(+), 3 deletions(-) (limited to 'libavformat') diff --git a/libavformat/rtpenc_h264.c b/libavformat/rtpenc_h264.c index 1a486cf..776da83 100644 --- a/libavformat/rtpenc_h264.c +++ b/libavformat/rtpenc_h264.c @@ -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; } -- cgit v1.1