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FFmpeg/libavformat/rsd.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

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/*
* RSD demuxer
* Copyright (c) 2013 James Almer
*
* 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 "libavcodec/bytestream.h"
#include "libavutil/intreadwrite.h"
#include "avformat.h"
#include "avio.h"
#include "internal.h"
static const AVCodecTag rsd_tags[] = {
{ AV_CODEC_ID_ADPCM_PSX, MKTAG('V','A','G',' ') },
{ AV_CODEC_ID_ADPCM_THP_LE, MKTAG('G','A','D','P') },
{ AV_CODEC_ID_ADPCM_THP, MKTAG('W','A','D','P') },
{ AV_CODEC_ID_ADPCM_IMA_RAD, MKTAG('R','A','D','P') },
{ AV_CODEC_ID_ADPCM_IMA_WAV, MKTAG('X','A','D','P') },
{ AV_CODEC_ID_PCM_S16BE, MKTAG('P','C','M','B') },
{ AV_CODEC_ID_PCM_S16LE, MKTAG('P','C','M',' ') },
{ AV_CODEC_ID_XMA2, MKTAG('X','M','A',' ') },
{ AV_CODEC_ID_NONE, 0 },
};
static const uint32_t rsd_unsupported_tags[] = {
MKTAG('O','G','G',' '),
};
static int rsd_probe(const AVProbeData *p)
{
if (memcmp(p->buf, "RSD", 3) || p->buf[3] - '0' < 2 || p->buf[3] - '0' > 6)
return 0;
if (AV_RL32(p->buf + 8) > 256 || !AV_RL32(p->buf + 8))
return AVPROBE_SCORE_MAX / 8;
if (AV_RL32(p->buf + 16) > 8*48000 || !AV_RL32(p->buf + 16))
return AVPROBE_SCORE_MAX / 8;
return AVPROBE_SCORE_MAX;
}
static int rsd_read_header(AVFormatContext *s)
{
AVIOContext *pb = s->pb;
int i, ret, version, start = 0x800;
AVCodecParameters *par;
AVStream *st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR(ENOMEM);
avio_skip(pb, 3); // "RSD"
version = avio_r8(pb) - '0';
par = st->codecpar;
par->codec_type = AVMEDIA_TYPE_AUDIO;
par->codec_tag = avio_rl32(pb);
par->codec_id = ff_codec_get_id(rsd_tags, par->codec_tag);
if (!par->codec_id) {
const char *tag_buf = av_fourcc2str(par->codec_tag);
for (i=0; i < FF_ARRAY_ELEMS(rsd_unsupported_tags); i++) {
if (par->codec_tag == rsd_unsupported_tags[i]) {
avpriv_request_sample(s, "Codec tag: %s", tag_buf);
return AVERROR_PATCHWELCOME;
}
}
av_log(s, AV_LOG_ERROR, "Unknown codec tag: %s\n", tag_buf);
return AVERROR_INVALIDDATA;
}
par->channels = avio_rl32(pb);
if (par->channels <= 0 || par->channels > INT_MAX / 36) {
av_log(s, AV_LOG_ERROR, "Invalid number of channels: %d\n", par->channels);
return AVERROR_INVALIDDATA;
}
avio_skip(pb, 4); // Bit depth
par->sample_rate = avio_rl32(pb);
if (!par->sample_rate)
return AVERROR_INVALIDDATA;
avio_skip(pb, 4); // Unknown
switch (par->codec_id) {
case AV_CODEC_ID_XMA2:
par->block_align = 2048;
if ((ret = ff_alloc_extradata(par, 34)) < 0)
return ret;
memset(par->extradata, 0, 34);
break;
case AV_CODEC_ID_ADPCM_PSX:
par->block_align = 16 * par->channels;
if (pb->seekable & AVIO_SEEKABLE_NORMAL)
st->duration = av_get_audio_frame_duration2(par, avio_size(pb) - start);
break;
case AV_CODEC_ID_ADPCM_IMA_RAD:
par->block_align = 20 * par->channels;
if (pb->seekable & AVIO_SEEKABLE_NORMAL)
st->duration = av_get_audio_frame_duration2(par, avio_size(pb) - start);
break;
case AV_CODEC_ID_ADPCM_IMA_WAV:
if (version == 2)
start = avio_rl32(pb);
par->bits_per_coded_sample = 4;
par->block_align = 36 * par->channels;
if (pb->seekable & AVIO_SEEKABLE_NORMAL)
st->duration = av_get_audio_frame_duration2(par, avio_size(pb) - start);
break;
case AV_CODEC_ID_ADPCM_THP_LE:
/* RSD3GADP is mono, so only alloc enough memory
to store the coeff table for a single channel. */
start = avio_rl32(pb);
if ((ret = ff_get_extradata(s, par, s->pb, 32)) < 0)
return ret;
if (pb->seekable & AVIO_SEEKABLE_NORMAL)
st->duration = av_get_audio_frame_duration2(par, avio_size(pb) - start);
break;
case AV_CODEC_ID_ADPCM_THP:
par->block_align = 8 * par->channels;
avio_skip(s->pb, 0x1A4 - avio_tell(s->pb));
if ((ret = ff_alloc_extradata(st->codecpar, 32 * par->channels)) < 0)
return ret;
for (i = 0; i < par->channels; i++) {
avio_read(s->pb, st->codecpar->extradata + 32 * i, 32);
avio_skip(s->pb, 8);
}
if (pb->seekable & AVIO_SEEKABLE_NORMAL)
st->duration = (avio_size(pb) - start) / (8 * par->channels) * 14;
break;
case AV_CODEC_ID_PCM_S16LE:
case AV_CODEC_ID_PCM_S16BE:
if (version != 4)
start = avio_rl32(pb);
if (pb->seekable & AVIO_SEEKABLE_NORMAL)
st->duration = (avio_size(pb) - start) / 2 / par->channels;
break;
}
avio_skip(pb, start - avio_tell(pb));
if (par->codec_id == AV_CODEC_ID_XMA2) {
avio_skip(pb, avio_rb32(pb) + avio_rb32(pb));
st->duration = avio_rb32(pb);
}
avpriv_set_pts_info(st, 64, 1, par->sample_rate);
return 0;
}
static int rsd_read_packet(AVFormatContext *s, AVPacket *pkt)
{
AVCodecParameters *par = s->streams[0]->codecpar;
int ret, size = 1024;
int64_t pos;
if (avio_feof(s->pb))
return AVERROR_EOF;
pos = avio_tell(s->pb);
if (par->codec_id == AV_CODEC_ID_ADPCM_IMA_RAD ||
par->codec_id == AV_CODEC_ID_ADPCM_PSX ||
par->codec_id == AV_CODEC_ID_ADPCM_IMA_WAV ||
par->codec_id == AV_CODEC_ID_XMA2) {
ret = av_get_packet(s->pb, pkt, par->block_align);
} else if (par->codec_tag == MKTAG('W','A','D','P') &&
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, size);
}
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_rsd_demuxer = {
.name = "rsd",
.long_name = NULL_IF_CONFIG_SMALL("GameCube RSD"),
.read_probe = rsd_probe,
.read_header = rsd_read_header,
.read_packet = rsd_read_packet,
.extensions = "rsd",
.codec_tag = (const AVCodecTag* const []){rsd_tags, 0},
.flags = AVFMT_GENERIC_INDEX,
};
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