mirror of
https://github.com/xenia-project/FFmpeg.git
synced 2024-11-27 13:30:45 +00:00
6f69f7a8bf
* commit '9200514ad8717c63f82101dc394f4378854325bf':
lavf: replace AVStream.codec with AVStream.codecpar
This has been a HUGE effort from:
- Derek Buitenhuis <derek.buitenhuis@gmail.com>
- Hendrik Leppkes <h.leppkes@gmail.com>
- wm4 <nfxjfg@googlemail.com>
- Clément Bœsch <clement@stupeflix.com>
- James Almer <jamrial@gmail.com>
- Michael Niedermayer <michael@niedermayer.cc>
- Rostislav Pehlivanov <atomnuker@gmail.com>
Merged-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>
118 lines
3.7 KiB
C
118 lines
3.7 KiB
C
/*
|
|
* VPK 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/intreadwrite.h"
|
|
#include "avformat.h"
|
|
#include "internal.h"
|
|
|
|
typedef struct VPKDemuxContext {
|
|
unsigned block_count;
|
|
unsigned current_block;
|
|
unsigned last_block_size;
|
|
} VPKDemuxContext;
|
|
|
|
static int vpk_probe(AVProbeData *p)
|
|
{
|
|
if (AV_RL32(p->buf) != MKBETAG('V','P','K',' '))
|
|
return 0;
|
|
|
|
return AVPROBE_SCORE_MAX / 3 * 2;
|
|
}
|
|
|
|
static int vpk_read_header(AVFormatContext *s)
|
|
{
|
|
VPKDemuxContext *vpk = s->priv_data;
|
|
unsigned offset;
|
|
unsigned samples_per_block;
|
|
AVStream *st;
|
|
|
|
vpk->current_block = 0;
|
|
st = avformat_new_stream(s, NULL);
|
|
if (!st)
|
|
return AVERROR(ENOMEM);
|
|
|
|
avio_skip(s->pb, 4);
|
|
st->duration = avio_rl32(s->pb) * 28 / 16;
|
|
offset = avio_rl32(s->pb);
|
|
st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
|
|
st->codecpar->codec_id = AV_CODEC_ID_ADPCM_PSX;
|
|
st->codecpar->block_align = avio_rl32(s->pb);
|
|
st->codecpar->sample_rate = avio_rl32(s->pb);
|
|
if (st->codecpar->sample_rate <= 0)
|
|
return AVERROR_INVALIDDATA;
|
|
st->codecpar->channels = avio_rl32(s->pb);
|
|
if (st->codecpar->channels <= 0)
|
|
return AVERROR_INVALIDDATA;
|
|
samples_per_block = ((st->codecpar->block_align / st->codecpar->channels) * 28) / 16;
|
|
if (samples_per_block <= 0)
|
|
return AVERROR_INVALIDDATA;
|
|
vpk->block_count = (st->duration + (samples_per_block - 1)) / samples_per_block;
|
|
vpk->last_block_size = (st->duration % samples_per_block) * 16 * st->codecpar->channels / 28;
|
|
avio_skip(s->pb, offset - avio_tell(s->pb));
|
|
avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int vpk_read_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
AVCodecParameters *par = s->streams[0]->codecpar;
|
|
VPKDemuxContext *vpk = s->priv_data;
|
|
int ret, i;
|
|
|
|
vpk->current_block++;
|
|
if (vpk->current_block == vpk->block_count) {
|
|
unsigned size = vpk->last_block_size / par->channels;
|
|
unsigned skip = (par->block_align - vpk->last_block_size) / par->channels;
|
|
|
|
ret = av_new_packet(pkt, vpk->last_block_size);
|
|
if (ret < 0)
|
|
return ret;
|
|
for (i = 0; i < par->channels; i++) {
|
|
ret = avio_read(s->pb, pkt->data + i * size, size);
|
|
avio_skip(s->pb, skip);
|
|
if (ret != size) {
|
|
av_packet_unref(pkt);
|
|
ret = AVERROR(EIO);
|
|
break;
|
|
}
|
|
}
|
|
pkt->stream_index = 0;
|
|
} else if (vpk->current_block < vpk->block_count) {
|
|
ret = av_get_packet(s->pb, pkt, par->block_align);
|
|
pkt->stream_index = 0;
|
|
} else {
|
|
return AVERROR_EOF;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
AVInputFormat ff_vpk_demuxer = {
|
|
.name = "vpk",
|
|
.long_name = NULL_IF_CONFIG_SMALL("Sony PS2 VPK"),
|
|
.priv_data_size = sizeof(VPKDemuxContext),
|
|
.read_probe = vpk_probe,
|
|
.read_header = vpk_read_header,
|
|
.read_packet = vpk_read_packet,
|
|
.extensions = "vpk",
|
|
};
|