mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
113 lines
3.4 KiB
113 lines
3.4 KiB
/* |
|
* XVAG demuxer |
|
* Copyright (c) 2015 Paul B Mahol |
|
* |
|
* 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 "libavutil/bswap.h" |
|
#include "libavcodec/internal.h" |
|
#include "avformat.h" |
|
#include "internal.h" |
|
|
|
static int xvag_probe(const AVProbeData *p) |
|
{ |
|
if (memcmp(p->buf, "XVAG", 4) || |
|
memcmp(p->buf+32, "fmat", 4)) |
|
return 0; |
|
|
|
return AVPROBE_SCORE_MAX; |
|
} |
|
|
|
static int xvag_read_header(AVFormatContext *s) |
|
{ |
|
unsigned offset, big_endian, codec; |
|
AVStream *st; |
|
|
|
avio_skip(s->pb, 4); |
|
|
|
st = avformat_new_stream(s, NULL); |
|
if (!st) |
|
return AVERROR(ENOMEM); |
|
|
|
st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; |
|
|
|
offset = avio_rl32(s->pb); |
|
big_endian = offset > av_bswap32(offset); |
|
if (big_endian) { |
|
offset = av_bswap32(offset); |
|
avio_skip(s->pb, 28); |
|
codec = avio_rb32(s->pb); |
|
st->codecpar->channels = avio_rb32(s->pb); |
|
avio_skip(s->pb, 4); |
|
st->duration = avio_rb32(s->pb); |
|
avio_skip(s->pb, 8); |
|
st->codecpar->sample_rate = avio_rb32(s->pb); |
|
} else { |
|
avio_skip(s->pb, 28); |
|
codec = avio_rl32(s->pb); |
|
st->codecpar->channels = avio_rl32(s->pb); |
|
avio_skip(s->pb, 4); |
|
st->duration = avio_rl32(s->pb); |
|
avio_skip(s->pb, 8); |
|
st->codecpar->sample_rate = avio_rl32(s->pb); |
|
} |
|
|
|
if (st->codecpar->sample_rate <= 0) |
|
return AVERROR_INVALIDDATA; |
|
if (st->codecpar->channels <= 0 || st->codecpar->channels > FF_SANE_NB_CHANNELS) |
|
return AVERROR_INVALIDDATA; |
|
|
|
switch (codec) { |
|
case 0x1c: |
|
st->codecpar->codec_id = AV_CODEC_ID_ADPCM_PSX; |
|
st->codecpar->block_align = 16 * st->codecpar->channels; |
|
break; |
|
default: |
|
avpriv_request_sample(s, "codec %X", codec); |
|
return AVERROR_PATCHWELCOME; |
|
}; |
|
|
|
avio_skip(s->pb, offset - avio_tell(s->pb)); |
|
|
|
if (avio_rb16(s->pb) == 0xFFFB) { |
|
st->codecpar->codec_id = AV_CODEC_ID_MP3; |
|
st->codecpar->block_align = 0x1000; |
|
st->need_parsing = AVSTREAM_PARSE_FULL_RAW; |
|
} |
|
|
|
avio_skip(s->pb, -2); |
|
avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate); |
|
|
|
return 0; |
|
} |
|
|
|
static int xvag_read_packet(AVFormatContext *s, AVPacket *pkt) |
|
{ |
|
AVCodecParameters *par = s->streams[0]->codecpar; |
|
|
|
return av_get_packet(s->pb, pkt, par->block_align); |
|
} |
|
|
|
const AVInputFormat ff_xvag_demuxer = { |
|
.name = "xvag", |
|
.long_name = NULL_IF_CONFIG_SMALL("Sony PS3 XVAG"), |
|
.read_probe = xvag_probe, |
|
.read_header = xvag_read_header, |
|
.read_packet = xvag_read_packet, |
|
.extensions = "xvag", |
|
};
|
|
|