mirror of https://git.ffmpeg.org/ffmpeg.git
204 lines
7.2 KiB
C
204 lines
7.2 KiB
C
/*
|
|
* GENH 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 "libavcodec/internal.h"
|
|
#include "avformat.h"
|
|
#include "internal.h"
|
|
|
|
typedef struct GENHDemuxContext {
|
|
unsigned dsp_int_type;
|
|
unsigned interleave_size;
|
|
} GENHDemuxContext;
|
|
|
|
static int genh_probe(const AVProbeData *p)
|
|
{
|
|
if (AV_RL32(p->buf) != MKTAG('G','E','N','H'))
|
|
return 0;
|
|
if (AV_RL32(p->buf+4) <= 0 || AV_RL32(p->buf+4) > 0xFFFF) // channels
|
|
return 0;
|
|
|
|
return AVPROBE_SCORE_MAX / 3 * 2;
|
|
}
|
|
|
|
static int genh_read_header(AVFormatContext *s)
|
|
{
|
|
unsigned start_offset, header_size, codec, coef_type, coef[2];
|
|
GENHDemuxContext *c = s->priv_data;
|
|
av_unused unsigned coef_splitted[2];
|
|
int align, ch, ret;
|
|
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;
|
|
st->codecpar->channels = avio_rl32(s->pb);
|
|
if (st->codecpar->channels <= 0 || st->codecpar->channels > FF_SANE_NB_CHANNELS)
|
|
return AVERROR_INVALIDDATA;
|
|
if (st->codecpar->channels == 1)
|
|
st->codecpar->channel_layout = AV_CH_LAYOUT_MONO;
|
|
else if (st->codecpar->channels == 2)
|
|
st->codecpar->channel_layout = AV_CH_LAYOUT_STEREO;
|
|
align =
|
|
c->interleave_size = avio_rl32(s->pb);
|
|
if (align < 0 || align > INT_MAX / st->codecpar->channels)
|
|
return AVERROR_INVALIDDATA;
|
|
st->codecpar->block_align = align * st->codecpar->channels;
|
|
st->codecpar->sample_rate = avio_rl32(s->pb);
|
|
if (st->codecpar->sample_rate < 0)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
avio_skip(s->pb, 4);
|
|
st->duration = avio_rl32(s->pb);
|
|
|
|
codec = avio_rl32(s->pb);
|
|
switch (codec) {
|
|
case 0: st->codecpar->codec_id = AV_CODEC_ID_ADPCM_PSX; break;
|
|
case 1:
|
|
case 11: st->codecpar->bits_per_coded_sample = 4;
|
|
st->codecpar->block_align = 36 * st->codecpar->channels;
|
|
st->codecpar->codec_id = AV_CODEC_ID_ADPCM_IMA_WAV; break;
|
|
case 2: st->codecpar->codec_id = AV_CODEC_ID_ADPCM_DTK; break;
|
|
case 3: st->codecpar->codec_id = st->codecpar->block_align > 0 ?
|
|
AV_CODEC_ID_PCM_S16BE_PLANAR :
|
|
AV_CODEC_ID_PCM_S16BE; break;
|
|
case 4: st->codecpar->codec_id = st->codecpar->block_align > 0 ?
|
|
AV_CODEC_ID_PCM_S16LE_PLANAR :
|
|
AV_CODEC_ID_PCM_S16LE; break;
|
|
case 5: st->codecpar->codec_id = st->codecpar->block_align > 0 ?
|
|
AV_CODEC_ID_PCM_S8_PLANAR :
|
|
AV_CODEC_ID_PCM_S8; break;
|
|
case 6: if (st->codecpar->block_align > INT_MAX/1024)
|
|
return AVERROR_INVALIDDATA;
|
|
st->codecpar->codec_id = AV_CODEC_ID_SDX2_DPCM; break;
|
|
case 7: ret = ff_alloc_extradata(st->codecpar, 2);
|
|
if (ret < 0)
|
|
return ret;
|
|
AV_WL16(st->codecpar->extradata, 3);
|
|
st->codecpar->codec_id = AV_CODEC_ID_ADPCM_IMA_WS; break;
|
|
case 10: st->codecpar->codec_id = AV_CODEC_ID_ADPCM_AICA; break;
|
|
case 12: st->codecpar->codec_id = AV_CODEC_ID_ADPCM_THP; break;
|
|
case 13: st->codecpar->codec_id = AV_CODEC_ID_PCM_U8; break;
|
|
case 17: st->codecpar->codec_id = AV_CODEC_ID_ADPCM_IMA_QT; break;
|
|
default:
|
|
avpriv_request_sample(s, "codec %d", codec);
|
|
return AVERROR_PATCHWELCOME;
|
|
}
|
|
|
|
start_offset = avio_rl32(s->pb);
|
|
header_size = avio_rl32(s->pb);
|
|
|
|
if (header_size > start_offset)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
if (header_size == 0)
|
|
start_offset = 0x800;
|
|
|
|
coef[0] = avio_rl32(s->pb);
|
|
coef[1] = avio_rl32(s->pb);
|
|
c->dsp_int_type = avio_rl32(s->pb);
|
|
coef_type = avio_rl32(s->pb);
|
|
coef_splitted[0] = avio_rl32(s->pb);
|
|
coef_splitted[1] = avio_rl32(s->pb);
|
|
|
|
if (st->codecpar->codec_id == AV_CODEC_ID_ADPCM_THP) {
|
|
if (st->codecpar->channels > 2) {
|
|
avpriv_request_sample(s, "channels %d>2", st->codecpar->channels);
|
|
return AVERROR_PATCHWELCOME;
|
|
}
|
|
|
|
ff_alloc_extradata(st->codecpar, 32 * st->codecpar->channels);
|
|
for (ch = 0; ch < st->codecpar->channels; ch++) {
|
|
if (coef_type & 1) {
|
|
avpriv_request_sample(s, "coef_type & 1");
|
|
return AVERROR_PATCHWELCOME;
|
|
} else {
|
|
avio_seek(s->pb, coef[ch], SEEK_SET);
|
|
avio_read(s->pb, st->codecpar->extradata + 32 * ch, 32);
|
|
}
|
|
}
|
|
|
|
if (c->dsp_int_type == 1) {
|
|
st->codecpar->block_align = 8 * st->codecpar->channels;
|
|
if (c->interleave_size != 1 &&
|
|
c->interleave_size != 2 &&
|
|
c->interleave_size != 4)
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
}
|
|
|
|
if (st->codecpar->block_align <= 0)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
avio_skip(s->pb, start_offset - avio_tell(s->pb));
|
|
|
|
avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int genh_read_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
AVCodecParameters *par = s->streams[0]->codecpar;
|
|
GENHDemuxContext *c = s->priv_data;
|
|
int ret;
|
|
|
|
if (c->dsp_int_type == 1 && par->codec_id == AV_CODEC_ID_ADPCM_THP &&
|
|
par->channels > 1) {
|
|
int i, ch;
|
|
|
|
if (avio_feof(s->pb))
|
|
return AVERROR_EOF;
|
|
ret = av_new_packet(pkt, 8 * par->channels);
|
|
if (ret < 0)
|
|
return ret;
|
|
for (i = 0; i < 8 / c->interleave_size; i++) {
|
|
for (ch = 0; ch < par->channels; ch++) {
|
|
pkt->data[ch * 8 + i*c->interleave_size+0] = avio_r8(s->pb);
|
|
pkt->data[ch * 8 + i*c->interleave_size+1] = avio_r8(s->pb);
|
|
}
|
|
}
|
|
ret = 0;
|
|
} else if (par->codec_id == AV_CODEC_ID_SDX2_DPCM) {
|
|
ret = av_get_packet(s->pb, pkt, par->block_align * 1024);
|
|
|
|
} else {
|
|
ret = av_get_packet(s->pb, pkt, par->block_align ? par->block_align : 1024 * par->channels);
|
|
}
|
|
|
|
pkt->stream_index = 0;
|
|
return ret;
|
|
}
|
|
|
|
AVInputFormat ff_genh_demuxer = {
|
|
.name = "genh",
|
|
.long_name = NULL_IF_CONFIG_SMALL("GENeric Header"),
|
|
.priv_data_size = sizeof(GENHDemuxContext),
|
|
.read_probe = genh_probe,
|
|
.read_header = genh_read_header,
|
|
.read_packet = genh_read_packet,
|
|
.extensions = "genh",
|
|
};
|