h264 complete frames parsing support

Originally committed as revision 8398 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/h264.c

@@ -8048,6 +8048,9 @@ static int h264_parse(AVCodecParserContext *s,
     ParseContext *pc = &h->s.parse_context;
     int next;
 
+    if(s->flags & PARSER_FLAG_COMPLETE_FRAMES){
+        next= buf_size;
+    }else{
     next= find_frame_end(h, buf, buf_size);
 
     if (ff_combine_frame(pc, next, (uint8_t **)&buf, &buf_size) < 0) {
@@ -8059,6 +8062,7 @@ static int h264_parse(AVCodecParserContext *s,
     if(next<0){
         find_frame_end(h, &pc->buffer[pc->last_index + next], -next); //update state
     }
+    }
 
     *poutbuf = (uint8_t *)buf;
     *poutbuf_size = buf_size;