| 8b1bc2b0 |
/*
* FSB 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/avassert.h"
#include "libavutil/intreadwrite.h"
#include "avformat.h"
#include "avio.h"
#include "internal.h"
static int fsb_probe(AVProbeData *p)
{
if (memcmp(p->buf, "FSB", 3) || p->buf[3] - '0' < 1 || p->buf[3] - '0' > 5)
return 0;
if (AV_RL32(p->buf + 4) != 1)
return 0;
return AVPROBE_SCORE_MAX;
}
static int fsb_read_header(AVFormatContext *s)
{
AVIOContext *pb = s->pb;
unsigned format, version, c;
int64_t offset;
AVCodecContext *codec;
AVStream *st = avformat_new_stream(s, NULL);
avio_skip(pb, 3); // "FSB"
version = avio_r8(pb) - '0';
if (version != 4 && version != 3) {
avpriv_request_sample(s, "version %d", version);
return AVERROR_PATCHWELCOME;
}
avio_skip(pb, 4);
if (!st)
return AVERROR(ENOMEM);
codec = st->codec;
codec->codec_type = AVMEDIA_TYPE_AUDIO;
codec->codec_tag = 0;
if (version == 3) {
offset = avio_rl32(pb) + 0x18;
avio_skip(pb, 44);
st->duration = avio_rl32(pb);
avio_skip(pb, 12);
format = avio_rl32(pb);
codec->sample_rate = avio_rl32(pb);
if (codec->sample_rate <= 0)
return AVERROR_INVALIDDATA;
avio_skip(pb, 6);
codec->channels = avio_rl16(pb);
if (!codec->channels)
return AVERROR_INVALIDDATA;
if (format & 0x00000100) {
codec->codec_id = AV_CODEC_ID_PCM_S16LE;
codec->block_align = 4096 * codec->channels;
} else if (format & 0x00400000) {
codec->bits_per_coded_sample = 4;
codec->codec_id = AV_CODEC_ID_ADPCM_IMA_WAV;
codec->block_align = 36 * codec->channels;
} else if (format & 0x00800000) {
codec->codec_id = AV_CODEC_ID_ADPCM_PSX;
codec->block_align = 16 * codec->channels;
} else if (format & 0x02000000) {
codec->codec_id = AV_CODEC_ID_ADPCM_THP;
codec->block_align = 8 * codec->channels;
if (codec->channels > INT_MAX / 32)
return AVERROR_INVALIDDATA;
ff_alloc_extradata(codec, 32 * codec->channels);
if (!codec->extradata)
return AVERROR(ENOMEM);
avio_seek(pb, 0x68, SEEK_SET);
for (c = 0; c < codec->channels; c++) {
avio_read(pb, codec->extradata + 32 * c, 32);
avio_skip(pb, 14);
}
} else {
avpriv_request_sample(s, "format 0x%X", format);
return AVERROR_PATCHWELCOME;
}
} else if (version == 4) {
offset = avio_rl32(pb) + 0x30;
avio_skip(pb, 80);
st->duration = avio_rl32(pb);
format = avio_rb32(pb);
switch(format) {
case 0x40001001:
case 0x00001005:
case 0x40001081:
case 0x40200001:
codec->codec_id = AV_CODEC_ID_XMA2;
break;
case 0x40000802:
codec->codec_id = AV_CODEC_ID_ADPCM_THP;
break;
default:
avpriv_request_sample(s, "format 0x%X", format);
return AVERROR_PATCHWELCOME;
}
codec->sample_rate = avio_rl32(pb);
if (codec->sample_rate <= 0)
return AVERROR_INVALIDDATA;
avio_skip(pb, 6);
codec->channels = avio_rl16(pb);
if (!codec->channels)
return AVERROR_INVALIDDATA;
switch (codec->codec_id) {
case AV_CODEC_ID_XMA2:
ff_alloc_extradata(codec, 34);
if (!codec->extradata)
return AVERROR(ENOMEM);
memset(codec->extradata, 0, 34);
codec->block_align = 2048;
break;
case AV_CODEC_ID_ADPCM_THP:
if (codec->channels > INT_MAX / 32)
return AVERROR_INVALIDDATA;
ff_alloc_extradata(codec, 32 * codec->channels);
if (!codec->extradata)
return AVERROR(ENOMEM);
avio_seek(pb, 0x80, SEEK_SET);
for (c = 0; c < codec->channels; c++) {
avio_read(pb, codec->extradata + 32 * c, 32);
avio_skip(pb, 14);
}
codec->block_align = 8 * codec->channels;
break;
}
} else {
av_assert0(0);
}
avio_skip(pb, offset - avio_tell(pb));
s->internal->data_offset = avio_tell(pb);
avpriv_set_pts_info(st, 64, 1, codec->sample_rate);
return 0;
}
static int fsb_read_packet(AVFormatContext *s, AVPacket *pkt)
{
AVCodecContext *codec = s->streams[0]->codec;
int64_t pos;
int ret;
if (avio_feof(s->pb))
return AVERROR_EOF;
pos = avio_tell(s->pb);
if (codec->codec_id == AV_CODEC_ID_ADPCM_THP &&
codec->channels > 1) {
int i, ch;
ret = av_new_packet(pkt, codec->block_align);
if (ret < 0)
return ret;
for (i = 0; i < 4; i++) {
for (ch = 0; ch < codec->channels; ch++) {
pkt->data[ch * 8 + i * 2 + 0] = avio_r8(s->pb);
pkt->data[ch * 8 + i * 2 + 1] = avio_r8(s->pb);
}
}
ret = 0;
} else {
ret = av_get_packet(s->pb, pkt, codec->block_align);
}
if (codec->codec_id == AV_CODEC_ID_XMA2 && pkt->size >= 1)
pkt->duration = (pkt->data[0] >> 2) * 512;
pkt->pos = pos;
pkt->stream_index = 0;
return ret;
}
AVInputFormat ff_fsb_demuxer = {
.name = "fsb",
.long_name = NULL_IF_CONFIG_SMALL("FMOD Sample Bank"),
.read_probe = fsb_probe,
.read_header = fsb_read_header,
.read_packet = fsb_read_packet,
.extensions = "fsb",
.flags = AVFMT_GENERIC_INDEX,
}; |