diff options
Diffstat (limited to 'libavcodec/mpeg4video_parser.c')
| -rw-r--r-- | libavcodec/mpeg4video_parser.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/libavcodec/mpeg4video_parser.c b/libavcodec/mpeg4video_parser.c index 4771ca0b44..9accc91265 100644 --- a/libavcodec/mpeg4video_parser.c +++ b/libavcodec/mpeg4video_parser.c @@ -22,8 +22,46 @@ #include "parser.h" #include "mpegvideo.h" +#include "mpeg4video_parser.h" +int ff_mpeg4_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size){ + int vop_found, i; + uint32_t state; + + vop_found= pc->frame_start_found; + state= pc->state; + + i=0; + if(!vop_found){ + for(i=0; i<buf_size; i++){ + state= (state<<8) | buf[i]; + if(state == 0x1B6){ + i++; + vop_found=1; + break; + } + } + } + + if(vop_found){ + /* EOF considered as end of frame */ + if (buf_size == 0) + return 0; + for(; i<buf_size; i++){ + state= (state<<8) | buf[i]; + if((state&0xFFFFFF00) == 0x100){ + pc->frame_start_found=0; + pc->state=-1; + return i-3; + } + } + } + pc->frame_start_found= vop_found; + pc->state= state; + return END_NOT_FOUND; +} + /* XXX: make it use less memory */ static int av_mpeg4_decode_header(AVCodecParserContext *s1, AVCodecContext *avctx, |