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mirror of https://github.com/FFmpeg/FFmpeg.git synced 2024-12-23 12:43:46 +02:00

avformat: add Square SVS demuxer

This commit is contained in:
Paul B Mahol 2020-09-11 11:47:34 +02:00
parent cd67bf2a28
commit ddc9cce3cd
5 changed files with 101 additions and 1 deletions

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@ -23,6 +23,7 @@ version <next>:
- PhotoCD decoder
- MCA demuxer
- AV1 decoder (Hardware acceleration used only)
- SVS demuxer
version 4.3:

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@ -519,6 +519,7 @@ OBJS-$(CONFIG_SUBVIEWER_DEMUXER) += subviewerdec.o subtitles.o
OBJS-$(CONFIG_SUP_DEMUXER) += supdec.o
OBJS-$(CONFIG_SUP_MUXER) += supenc.o
OBJS-$(CONFIG_SVAG_DEMUXER) += svag.o
OBJS-$(CONFIG_SVS_DEMUXER) += svs.o
OBJS-$(CONFIG_SWF_DEMUXER) += swfdec.o swf.o
OBJS-$(CONFIG_SWF_MUXER) += swfenc.o swf.o
OBJS-$(CONFIG_TAK_DEMUXER) += takdec.o apetag.o img2.o rawdec.o

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@ -416,6 +416,7 @@ extern AVInputFormat ff_subviewer_demuxer;
extern AVInputFormat ff_sup_demuxer;
extern AVOutputFormat ff_sup_muxer;
extern AVInputFormat ff_svag_demuxer;
extern AVInputFormat ff_svs_demuxer;
extern AVInputFormat ff_swf_demuxer;
extern AVOutputFormat ff_swf_muxer;
extern AVInputFormat ff_tak_demuxer;

97
libavformat/svs.c Normal file
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@ -0,0 +1,97 @@
/*
* SVS demuxer
* Copyright (c) 2020 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/channel_layout.h"
#include "libavutil/intreadwrite.h"
#include "avformat.h"
#include "internal.h"
static int svs_probe(const AVProbeData *p)
{
if (p->buf_size < 32)
return 0;
if (memcmp(p->buf, "SVS\00", 4))
return 0;
if (AV_RL32(p->buf + 16) == 0)
return 0;
return AVPROBE_SCORE_MAX / 3;
}
static int svs_read_header(AVFormatContext *s)
{
AVStream *st;
uint32_t pitch;
st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR(ENOMEM);
avio_skip(s->pb, 16);
pitch = avio_rl32(s->pb);
avio_skip(s->pb, 12);
s->internal->data_offset = avio_tell(s->pb);
st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
st->codecpar->codec_id = AV_CODEC_ID_ADPCM_PSX;
st->codecpar->channel_layout = AV_CH_LAYOUT_STEREO;
st->codecpar->channels = 2;
st->codecpar->sample_rate = av_rescale_rnd(pitch, 48000, 4096, AV_ROUND_INF);
st->codecpar->block_align = 32;
st->start_time = 0;
if (s->pb->seekable & AVIO_SEEKABLE_NORMAL)
st->duration = av_get_audio_frame_duration2(st->codecpar,
avio_size(s->pb) - 32);
avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
return 0;
}
static int svs_read_packet(AVFormatContext *s, AVPacket *pkt)
{
int ret;
if (avio_feof(s->pb))
return AVERROR_EOF;
ret = av_get_packet(s->pb, pkt, 32 * 256);
if (ret != 32 * 256) {
if (ret < 0)
return ret;
av_shrink_packet(pkt, ret);
pkt->flags &= ~AV_PKT_FLAG_CORRUPT;
}
pkt->stream_index = 0;
return ret;
}
AVInputFormat ff_svs_demuxer = {
.name = "svs",
.long_name = NULL_IF_CONFIG_SMALL("Square SVS"),
.read_probe = svs_probe,
.read_header = svs_read_header,
.read_packet = svs_read_packet,
.extensions = "svs",
};

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@ -32,7 +32,7 @@
// Major bumping may affect Ticket5467, 5421, 5451(compatibility with Chromium)
// Also please add any ticket numbers that you believe might be affected here
#define LIBAVFORMAT_VERSION_MAJOR 58
#define LIBAVFORMAT_VERSION_MINOR 54
#define LIBAVFORMAT_VERSION_MINOR 55
#define LIBAVFORMAT_VERSION_MICRO 100
#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \