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mirror of https://github.com/FFmpeg/FFmpeg.git synced 2024-12-07 11:13:41 +02:00
FFmpeg/libavformat/sol.c
Michael Niedermayer 6cb2085278 Merge remote-tracking branch 'qatar/master'
* qatar/master: (27 commits)
  ppc: Add ff_ prefix to nonstatic symbols
  sh4: Add ff_ prefix to nonstatic symbols
  mpegvideo: Add ff_ prefix to nonstatic functions
  rtjpeg: Add ff_ prefix to nonstatic symbols
  rv: Add ff_ prefix to nonstatic symbols
  vp56: Add ff_ prefix to nonstatic symbols
  vorbis: Add ff_ prefix to nonstatic symbols
  msmpeg4: Add ff_ prefix to nonstatic symbols
  vc1: Add ff_ prefix to nonstatic symbols
  msmpeg4: Add ff_ prefixes to nonstatic symbols
  snow: Add ff_ prefix to nonstatic symbols
  mpeg12: Add ff_ prefix to nonstatic symbols
  mpeg4: Add ff_ prefixes to nonstatic symbols
  lagarith: Add ff_ prefix to lag_rac_init
  libavcodec: Add ff_ prefix to j_rev_dct*
  dsputil: Add ff_ prefix to inv_zigzag_direct16
  libavcodec: Prefix fdct_ifast, fdct_ifast248
  dsputil: Add ff_ prefix to the dsputil*_init* functions
  libavcodec: Add ff_ prefix to some nonstatic symbols
  vlc/rl: Add ff_ prefix to the nonstatic symbols
  ...

Conflicts:
	libavcodec/Makefile
	libavcodec/allcodecs.c
	libavcodec/dnxhddec.c
	libavcodec/ffv1.c
	libavcodec/h263.h
	libavcodec/h263dec.c
	libavcodec/h264.c
	libavcodec/mpegvideo.c
	libavcodec/mpegvideo_enc.c
	libavcodec/nuv.c
	libavcodec/ppc/dsputil_ppc.c
	libavcodec/proresdsp.c
	libavcodec/svq3.c
	libavcodec/version.h
	libavformat/dv.h
	libavformat/dvenc.c
	libavformat/matroskadec.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
2012-02-16 01:34:37 +01:00

152 lines
4.0 KiB
C

/*
* Sierra SOL demuxer
* Copyright Konstantin Shishkov
*
* 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
*/
/*
* Based on documents from Game Audio Player and own research
*/
#include "libavutil/intreadwrite.h"
#include "avformat.h"
#include "internal.h"
#include "pcm.h"
/* if we don't know the size in advance */
#define AU_UNKNOWN_SIZE ((uint32_t)(~0))
static int sol_probe(AVProbeData *p)
{
/* check file header */
uint16_t magic = AV_RL32(p->buf);
if ((magic == 0x0B8D || magic == 0x0C0D || magic == 0x0C8D) &&
p->buf[2] == 'S' && p->buf[3] == 'O' &&
p->buf[4] == 'L' && p->buf[5] == 0)
return AVPROBE_SCORE_MAX;
else
return 0;
}
#define SOL_DPCM 1
#define SOL_16BIT 4
#define SOL_STEREO 16
static enum CodecID sol_codec_id(int magic, int type)
{
if (magic == 0x0B8D)
{
if (type & SOL_DPCM) return CODEC_ID_SOL_DPCM;
else return CODEC_ID_PCM_U8;
}
if (type & SOL_DPCM)
{
if (type & SOL_16BIT) return CODEC_ID_SOL_DPCM;
else if (magic == 0x0C8D) return CODEC_ID_SOL_DPCM;
else return CODEC_ID_SOL_DPCM;
}
if (type & SOL_16BIT) return CODEC_ID_PCM_S16LE;
return CODEC_ID_PCM_U8;
}
static int sol_codec_type(int magic, int type)
{
if (magic == 0x0B8D) return 1;//SOL_DPCM_OLD;
if (type & SOL_DPCM)
{
if (type & SOL_16BIT) return 3;//SOL_DPCM_NEW16;
else if (magic == 0x0C8D) return 1;//SOL_DPCM_OLD;
else return 2;//SOL_DPCM_NEW8;
}
return -1;
}
static int sol_channels(int magic, int type)
{
if (magic == 0x0B8D || !(type & SOL_STEREO)) return 1;
return 2;
}
static int sol_read_header(AVFormatContext *s)
{
unsigned int magic,tag;
AVIOContext *pb = s->pb;
unsigned int id, channels, rate, type;
enum CodecID codec;
AVStream *st;
/* check ".snd" header */
magic = avio_rl16(pb);
tag = avio_rl32(pb);
if (tag != MKTAG('S', 'O', 'L', 0))
return -1;
rate = avio_rl16(pb);
type = avio_r8(pb);
avio_skip(pb, 4); /* size */
if (magic != 0x0B8D)
avio_r8(pb); /* newer SOLs contain padding byte */
codec = sol_codec_id(magic, type);
channels = sol_channels(magic, type);
if (codec == CODEC_ID_SOL_DPCM)
id = sol_codec_type(magic, type);
else id = 0;
/* now we are ready: build format streams */
st = avformat_new_stream(s, NULL);
if (!st)
return -1;
st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
st->codec->codec_tag = id;
st->codec->codec_id = codec;
st->codec->channels = channels;
st->codec->sample_rate = rate;
avpriv_set_pts_info(st, 64, 1, rate);
return 0;
}
#define MAX_SIZE 4096
static int sol_read_packet(AVFormatContext *s,
AVPacket *pkt)
{
int ret;
if (url_feof(s->pb))
return AVERROR(EIO);
ret= av_get_packet(s->pb, pkt, MAX_SIZE);
if (ret < 0)
return ret;
pkt->stream_index = 0;
/* note: we need to modify the packet size here to handle the last
packet */
pkt->size = ret;
return 0;
}
AVInputFormat ff_sol_demuxer = {
.name = "sol",
.long_name = NULL_IF_CONFIG_SMALL("Sierra SOL format"),
.read_probe = sol_probe,
.read_header = sol_read_header,
.read_packet = sol_read_packet,
.read_seek = ff_pcm_read_seek,
};