* RAW H.264 video demuxer
* Copyright (c) 2008 Michael Niedermayer <michaelni@gmx.at>
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
static int h264_probe(AVProbeData *p)
{
- uint32_t code= -1;
- int sps=0, pps=0, idr=0, res=0, sli=0;
+ uint32_t code = -1;
+ int sps = 0, pps = 0, idr = 0, res = 0, sli = 0;
int i;
- for(i=0; i<p->buf_size; i++){
- code = (code<<8) + p->buf[i];
+ for (i = 0; i < p->buf_size; i++) {
+ code = (code << 8) + p->buf[i];
if ((code & 0xffffff00) == 0x100) {
- int ref_idc= (code>>5)&3;
- int type = code & 0x1F;
- static const int8_t ref_zero[32]={
- 2, 0, 0, 0, 0,-1, 1,-1,
- -1, 1, 1, 1, 1,-1, 2, 2,
- 2, 2, 2, 0, 2, 2, 2, 2,
- 2, 2, 2, 2, 2, 2, 2, 2
+ int ref_idc = (code >> 5) & 3;
+ int type = code & 0x1F;
+ static const int8_t ref_zero[] = {
+ 2, 0, 0, 0, 0, -1, 1, -1,
+ -1, 1, 1, 1, 1, -1, 2, 2,
+ 2, 2, 2, 0, 2, 2, 2, 2,
+ 2, 2, 2, 2, 2, 2, 2, 2
};
- if(code & 0x80) //forbidden bit
+ if (code & 0x80) // forbidden_bit
return 0;
- if(ref_zero[type] == 1 && ref_idc)
+ if (ref_zero[type] == 1 && ref_idc)
return 0;
- if(ref_zero[type] ==-1 && !ref_idc)
+ if (ref_zero[type] == -1 && !ref_idc)
return 0;
- if(ref_zero[type] == 2)
+ if (ref_zero[type] == 2)
res++;
- switch(type){
- case 1: sli++; break;
- case 5: idr++; break;
- case 7:
- if(p->buf[i+2]&0x0F)
+ switch (type) {
+ case 1:
+ sli++;
+ break;
+ case 5:
+ idr++;
+ break;
+ case 7:
+ if (p->buf[i + 2] & 0x03)
return 0;
sps++;
break;
- case 8: pps++; break;
+ case 8:
+ pps++;
+ break;
}
}
}
- if(sps && pps && (idr||sli>3) && res<(sps+pps+idr))
- return AVPROBE_SCORE_MAX/2+1; // +1 for .mpg
+
+ if (sps && pps && (idr || sli > 3) && res < (sps + pps + idr))
+ return AVPROBE_SCORE_EXTENSION + 1; // 1 more than .mpg
+
return 0;
}
-AVInputFormat h264_demuxer = {
- "h264",
- NULL_IF_CONFIG_SMALL("raw H.264 video format"),
- 0,
- h264_probe,
- ff_raw_video_read_header,
- ff_raw_read_partial_packet,
- .flags= AVFMT_GENERIC_INDEX,
- .extensions = "h26l,h264,264", //FIXME remove after writing mpeg4_probe
- .value = CODEC_ID_H264,
-};
+FF_DEF_RAWVIDEO_DEMUXER(h264, "raw H.264 video", h264_probe, "h26l,h264,264,avc", AV_CODEC_ID_H264)