FFmpeg/libavformat/fsb.c
Andreas Rheinhardt c1e439d7e9 avformat: Forward errors where possible
It is not uncommon to find code where the caller thinks to know better
what the return value should be than the callee. E.g. something like
"if (av_new_packet(pkt, size) < 0) return AVERROR(ENOMEM);". This commit
changes several instances of this to instead forward the actual error.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
2019-12-12 19:25:33 +01:00

212 lines
6.3 KiB
C

/*
* 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(const 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;
AVCodecParameters *par;
AVStream *st = avformat_new_stream(s, NULL);
int ret;
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);
par = st->codecpar;
par->codec_type = AVMEDIA_TYPE_AUDIO;
par->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);
par->sample_rate = avio_rl32(pb);
if (par->sample_rate <= 0)
return AVERROR_INVALIDDATA;
avio_skip(pb, 6);
par->channels = avio_rl16(pb);
if (!par->channels)
return AVERROR_INVALIDDATA;
if (format & 0x00000100) {
par->codec_id = AV_CODEC_ID_PCM_S16LE;
par->block_align = 4096 * par->channels;
} else if (format & 0x00400000) {
par->bits_per_coded_sample = 4;
par->codec_id = AV_CODEC_ID_ADPCM_IMA_WAV;
par->block_align = 36 * par->channels;
} else if (format & 0x00800000) {
par->codec_id = AV_CODEC_ID_ADPCM_PSX;
par->block_align = 16 * par->channels;
} else if (format & 0x02000000) {
par->codec_id = AV_CODEC_ID_ADPCM_THP;
par->block_align = 8 * par->channels;
if (par->channels > INT_MAX / 32)
return AVERROR_INVALIDDATA;
ret = ff_alloc_extradata(par, 32 * par->channels);
if (ret < 0)
return ret;
avio_seek(pb, 0x68, SEEK_SET);
for (c = 0; c < par->channels; c++) {
avio_read(pb, par->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:
par->codec_id = AV_CODEC_ID_XMA2;
break;
case 0x40000802:
par->codec_id = AV_CODEC_ID_ADPCM_THP;
break;
default:
avpriv_request_sample(s, "format 0x%X", format);
return AVERROR_PATCHWELCOME;
}
par->sample_rate = avio_rl32(pb);
if (par->sample_rate <= 0)
return AVERROR_INVALIDDATA;
avio_skip(pb, 6);
par->channels = avio_rl16(pb);
if (!par->channels)
return AVERROR_INVALIDDATA;
switch (par->codec_id) {
case AV_CODEC_ID_XMA2:
ret = ff_alloc_extradata(par, 34);
if (ret < 0)
return ret;
memset(par->extradata, 0, 34);
par->block_align = 2048;
break;
case AV_CODEC_ID_ADPCM_THP:
if (par->channels > INT_MAX / 32)
return AVERROR_INVALIDDATA;
ret = ff_alloc_extradata(par, 32 * par->channels);
if (ret < 0)
return ret;
avio_seek(pb, 0x80, SEEK_SET);
for (c = 0; c < par->channels; c++) {
avio_read(pb, par->extradata + 32 * c, 32);
avio_skip(pb, 14);
}
par->block_align = 8 * par->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, par->sample_rate);
return 0;
}
static int fsb_read_packet(AVFormatContext *s, AVPacket *pkt)
{
AVCodecParameters *par = s->streams[0]->codecpar;
int64_t pos;
int ret;
if (avio_feof(s->pb))
return AVERROR_EOF;
pos = avio_tell(s->pb);
if (par->codec_id == AV_CODEC_ID_ADPCM_THP &&
par->channels > 1) {
int i, ch;
ret = av_new_packet(pkt, par->block_align);
if (ret < 0)
return ret;
for (i = 0; i < 4; i++) {
for (ch = 0; ch < par->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, par->block_align);
}
if (par->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,
};