mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-09-20 05:16:38 +00:00
7a72695c05
* commit '36ef5369ee9b336febc2c270f8718cec4476cb85': Replace all CODEC_ID_* with AV_CODEC_ID_* lavc: add AV prefix to codec ids. Conflicts: doc/APIchanges doc/examples/decoding_encoding.c doc/examples/muxing.c ffmpeg.c ffprobe.c ffserver.c libavcodec/8svx.c libavcodec/avcodec.h libavcodec/dnxhd_parser.c libavcodec/dvdsubdec.c libavcodec/error_resilience.c libavcodec/h263dec.c libavcodec/libvorbisenc.c libavcodec/mjpeg_parser.c libavcodec/mjpegenc.c libavcodec/mpeg12.c libavcodec/mpeg4videodec.c libavcodec/mpegvideo.c libavcodec/mpegvideo_enc.c libavcodec/pcm.c libavcodec/r210dec.c libavcodec/utils.c libavcodec/v210dec.c libavcodec/version.h libavdevice/alsa-audio-dec.c libavdevice/bktr.c libavdevice/v4l2.c libavformat/asfdec.c libavformat/asfenc.c libavformat/avformat.h libavformat/avidec.c libavformat/caf.c libavformat/electronicarts.c libavformat/flacdec.c libavformat/flvdec.c libavformat/flvenc.c libavformat/framecrcenc.c libavformat/img2.c libavformat/img2dec.c libavformat/img2enc.c libavformat/ipmovie.c libavformat/isom.c libavformat/matroska.c libavformat/matroskadec.c libavformat/matroskaenc.c libavformat/mov.c libavformat/movenc.c libavformat/mp3dec.c libavformat/mpeg.c libavformat/mpegts.c libavformat/mxf.c libavformat/mxfdec.c libavformat/mxfenc.c libavformat/nsvdec.c libavformat/nut.c libavformat/oggenc.c libavformat/pmpdec.c libavformat/rawdec.c libavformat/rawenc.c libavformat/riff.c libavformat/sdp.c libavformat/utils.c libavformat/vocenc.c libavformat/wtv.c libavformat/xmv.c Merged-by: Michael Niedermayer <michaelni@gmx.at>
78 lines
2.4 KiB
C
78 lines
2.4 KiB
C
/*
|
|
* RAW DTS demuxer
|
|
* Copyright (c) 2008 Benjamin Larsson
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg 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,
|
|
* 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
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include "libavcodec/bytestream.h"
|
|
#include "avformat.h"
|
|
#include "rawdec.h"
|
|
|
|
#define DCA_MARKER_14B_BE 0x1FFFE800
|
|
#define DCA_MARKER_14B_LE 0xFF1F00E8
|
|
#define DCA_MARKER_RAW_BE 0x7FFE8001
|
|
#define DCA_MARKER_RAW_LE 0xFE7F0180
|
|
|
|
static int dts_probe(AVProbeData *p)
|
|
{
|
|
const uint8_t *buf, *bufp;
|
|
uint32_t state = -1;
|
|
int markers[3] = {0};
|
|
int sum, max;
|
|
|
|
buf = p->buf;
|
|
|
|
for(; buf < (p->buf+p->buf_size)-2; buf+=2) {
|
|
bufp = buf;
|
|
state = (state << 16) | bytestream_get_be16(&bufp);
|
|
|
|
/* regular bitstream */
|
|
if (state == DCA_MARKER_RAW_BE || state == DCA_MARKER_RAW_LE)
|
|
markers[0]++;
|
|
|
|
/* 14 bits big-endian bitstream */
|
|
if (state == DCA_MARKER_14B_BE)
|
|
if ((bytestream_get_be16(&bufp) & 0xFFF0) == 0x07F0)
|
|
markers[1]++;
|
|
|
|
/* 14 bits little-endian bitstream */
|
|
if (state == DCA_MARKER_14B_LE)
|
|
if ((bytestream_get_be16(&bufp) & 0xF0FF) == 0xF007)
|
|
markers[2]++;
|
|
}
|
|
sum = markers[0] + markers[1] + markers[2];
|
|
max = markers[1] > markers[0];
|
|
max = markers[2] > markers[max] ? 2 : max;
|
|
if (markers[max] > 3 && p->buf_size / markers[max] < 32*1024 &&
|
|
markers[max] * 4 > sum * 3)
|
|
return AVPROBE_SCORE_MAX/2+1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
AVInputFormat ff_dts_demuxer = {
|
|
.name = "dts",
|
|
.long_name = NULL_IF_CONFIG_SMALL("raw DTS"),
|
|
.read_probe = dts_probe,
|
|
.read_header = ff_raw_audio_read_header,
|
|
.read_packet = ff_raw_read_partial_packet,
|
|
.flags = AVFMT_GENERIC_INDEX,
|
|
.extensions = "dts",
|
|
.raw_codec_id = AV_CODEC_ID_DTS,
|
|
};
|