avformat: add Argonaut Games CVG demuxer

Signed-off-by: Zane van Iperen <zane@zanevaniperen.com>
This commit is contained in:
Zane van Iperen 2021-05-03 21:20:35 +10:00
parent d1c28c6c78
commit 9789ea59d0
No known key found for this signature in database
GPG Key ID: 68616B2D8AC4DCC5
6 changed files with 251 additions and 2 deletions

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@ -5,6 +5,7 @@ version <next>:
- ADPCM IMA Westwood encoder
- Westwood AUD muxer
- ADPCM IMA Acorn Replay decoder
- Argonaut Games CVG demuxer
version 4.4:

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@ -399,6 +399,7 @@ Muxers/Demuxers:
apngdec.c Benoit Fouet
argo_asf.c Zane van Iperen
argo_brp.c Zane van Iperen
argo_cvg.c Zane van Iperen
ass* Aurelien Jacobs
astdec.c Paul B Mahol
astenc.c James Almer

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@ -107,6 +107,7 @@ OBJS-$(CONFIG_AQTITLE_DEMUXER) += aqtitledec.o subtitles.o
OBJS-$(CONFIG_ARGO_ASF_DEMUXER) += argo_asf.o
OBJS-$(CONFIG_ARGO_ASF_MUXER) += argo_asf.o
OBJS-$(CONFIG_ARGO_BRP_DEMUXER) += argo_brp.o argo_asf.o
OBJS-$(CONFIG_ARGO_CVG_DEMUXER) += argo_cvg.o
OBJS-$(CONFIG_ASF_DEMUXER) += asfdec_f.o asf.o asfcrypt.o \
avlanguage.o
OBJS-$(CONFIG_ASF_O_DEMUXER) += asfdec_o.o asf.o asfcrypt.o \

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@ -66,6 +66,7 @@ extern const AVInputFormat ff_aqtitle_demuxer;
extern const AVInputFormat ff_argo_asf_demuxer;
extern const AVOutputFormat ff_argo_asf_muxer;
extern const AVInputFormat ff_argo_brp_demuxer;
extern const AVInputFormat ff_argo_cvg_demuxer;
extern const AVInputFormat ff_asf_demuxer;
extern const AVOutputFormat ff_asf_muxer;
extern const AVInputFormat ff_asf_o_demuxer;

245
libavformat/argo_cvg.c Normal file
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@ -0,0 +1,245 @@
/*
* Argonaut Games CVG demuxer
*
* Copyright (C) 2021 Zane van Iperen (zane@zanevaniperen.com)
*
* 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 "avformat.h"
#include "internal.h"
#include "libavutil/intreadwrite.h"
/*
* .CVG files are essentially PSX ADPCM wrapped with a size and checksum.
* Found in the PSX versions of the game.
*/
#define ARGO_CVG_HEADER_SIZE 12
#define ARGO_CVG_BLOCK_ALIGN 0x10
#define ARGO_CVG_NB_BLOCKS 32
#define ARGO_CVG_SAMPLES_PER_BLOCK 28
typedef struct ArgoCVGHeader {
uint32_t size; /*< File size -8 (this + trailing checksum) */
uint32_t unk1; /*< Unknown. Always seems to be 0 or 1. */
uint32_t unk2; /*< Unknown. Always seems to be 0 or 1. */
} ArgoCVGHeader;
typedef struct ArgoCVGOverride {
const char *name;
ArgoCVGHeader header;
uint32_t checksum;
int sample_rate;
} ArgoCVGOverride;
typedef struct ArgoCVGDemuxContext {
ArgoCVGHeader header;
uint32_t checksum;
uint32_t num_blocks;
uint32_t blocks_read;
} ArgoCVGDemuxContext;
/* "Special" files that are played at a different rate. */
static ArgoCVGOverride overrides[] = {
{ "CRYS.CVG", { 23592, 0, 1 }, 2495499, 88200 }, /* Beta */
{ "REDCRY88.CVG", { 38280, 0, 1 }, 4134848, 88200 }, /* Beta */
{ "DANLOOP1.CVG", { 54744, 1, 0 }, 5684641, 37800 }, /* Beta */
{ "PICKUP88.CVG", { 12904, 0, 1 }, 1348091, 48000 }, /* Beta */
{ "SELECT1.CVG", { 5080, 0, 1 }, 549987, 44100 }, /* Beta */
};
static int argo_cvg_probe(const AVProbeData *p)
{
ArgoCVGHeader cvg;
/*
* It's almost impossible to detect these files based
* on the header alone. File extension is (unfortunately)
* the best way forward.
*/
if (!av_match_ext(p->filename, "cvg"))
return 0;
if (p->buf_size < ARGO_CVG_HEADER_SIZE)
return 0;
cvg.size = AV_RL32(p->buf + 0);
cvg.unk1 = AV_RL32(p->buf + 4);
cvg.unk2 = AV_RL32(p->buf + 8);
if (cvg.size < 8)
return 0;
if (cvg.unk1 != 0 && cvg.unk1 != 1)
return 0;
if (cvg.unk2 != 0 && cvg.unk2 != 1)
return 0;
return AVPROBE_SCORE_MAX / 4 + 1;
}
static int argo_cvg_read_checksum(AVIOContext *pb, const ArgoCVGHeader *cvg, uint32_t *checksum)
{
int ret;
uint8_t buf[4];
if (!(pb->seekable & AVIO_SEEKABLE_NORMAL)) {
*checksum = 0;
return 0;
}
if ((ret = avio_seek(pb, cvg->size + 4, SEEK_SET)) < 0)
return ret;
/* NB: Not using avio_rl32() because no error checking. */
if ((ret = avio_read(pb, buf, sizeof(buf))) < 0)
return ret;
else if (ret != sizeof(buf))
return AVERROR(EIO);
if ((ret = avio_seek(pb, ARGO_CVG_HEADER_SIZE, SEEK_SET)) < 0)
return ret;
*checksum = AV_RL32(buf);
return 0;
}
static int argo_cvg_read_header(AVFormatContext *s)
{
int ret;
AVStream *st;
AVCodecParameters *par;
uint8_t buf[ARGO_CVG_HEADER_SIZE];
const char *filename = av_basename(s->url);
ArgoCVGDemuxContext *ctx = s->priv_data;
if (!(st = avformat_new_stream(s, NULL)))
return AVERROR(ENOMEM);
if ((ret = avio_read(s->pb, buf, ARGO_CVG_HEADER_SIZE)) < 0)
return ret;
else if (ret != ARGO_CVG_HEADER_SIZE)
return AVERROR(EIO);
ctx->header.size = AV_RL32(buf + 0);
ctx->header.unk1 = AV_RL32(buf + 4);
ctx->header.unk2 = AV_RL32(buf + 8);
if (ctx->header.size < 8)
return AVERROR_INVALIDDATA;
av_log(s, AV_LOG_TRACE, "size = %u\n", ctx->header.size);
av_log(s, AV_LOG_TRACE, "unk = %u, %u\n", ctx->header.unk1, ctx->header.unk2);
if ((ret = argo_cvg_read_checksum(s->pb, &ctx->header, &ctx->checksum)) < 0)
return ret;
av_log(s, AV_LOG_TRACE, "checksum = %u\n", ctx->checksum);
par = st->codecpar;
par->codec_type = AVMEDIA_TYPE_AUDIO;
par->codec_id = AV_CODEC_ID_ADPCM_PSX;
par->sample_rate = 22050;
for (size_t i = 0; i < FF_ARRAY_ELEMS(overrides); i++) {
const ArgoCVGOverride *ovr = overrides + i;
if (ovr->header.size != ctx->header.size ||
ovr->header.unk1 != ctx->header.unk1 ||
ovr->header.unk2 != ctx->header.unk2 ||
ovr->checksum != ctx->checksum ||
av_strcasecmp(filename, ovr->name) != 0)
continue;
av_log(s, AV_LOG_TRACE, "found override, name = %s\n", ovr->name);
par->sample_rate = ovr->sample_rate;
break;
}
par->channels = 1;
par->channel_layout = AV_CH_LAYOUT_MONO;
par->bits_per_coded_sample = 4;
par->bits_per_raw_sample = 16;
par->block_align = ARGO_CVG_BLOCK_ALIGN;
par->bit_rate = par->sample_rate * par->bits_per_coded_sample;
ctx->num_blocks = (ctx->header.size - 8) / ARGO_CVG_BLOCK_ALIGN;
av_log(s, AV_LOG_TRACE, "num blocks = %u\n", ctx->num_blocks);
avpriv_set_pts_info(st, 64, 1, par->sample_rate);
st->start_time = 0;
st->duration = ctx->num_blocks * ARGO_CVG_SAMPLES_PER_BLOCK;
st->nb_frames = ctx->num_blocks;
return 0;
}
static int argo_cvg_read_packet(AVFormatContext *s, AVPacket *pkt)
{
int ret;
AVStream *st = s->streams[0];
ArgoCVGDemuxContext *ctx = s->priv_data;
if (ctx->blocks_read >= ctx->num_blocks)
return AVERROR_EOF;
ret = av_get_packet(s->pb, pkt, st->codecpar->block_align *
FFMIN(ARGO_CVG_NB_BLOCKS, ctx->num_blocks - ctx->blocks_read));
if (ret < 0)
return ret;
if (ret % st->codecpar->block_align != 0)
return AVERROR_INVALIDDATA;
pkt->stream_index = 0;
pkt->duration = ARGO_CVG_SAMPLES_PER_BLOCK * (ret / st->codecpar->block_align);
pkt->pts = ctx->blocks_read * ARGO_CVG_SAMPLES_PER_BLOCK;
pkt->flags &= ~AV_PKT_FLAG_CORRUPT;
ctx->blocks_read += ret / st->codecpar->block_align;
return 0;
}
static int argo_cvg_seek(AVFormatContext *s, int stream_index,
int64_t pts, int flags)
{
int64_t ret;
ArgoCVGDemuxContext *ctx = s->priv_data;
if (pts != 0 || stream_index != 0)
return AVERROR(EINVAL);
if ((ret = avio_seek(s->pb, ARGO_CVG_HEADER_SIZE, SEEK_SET)) < 0)
return ret;
ctx->blocks_read = 0;
return 0;
}
const AVInputFormat ff_argo_cvg_demuxer = {
.name = "argo_cvg",
.long_name = NULL_IF_CONFIG_SMALL("Argonaut Games CVG"),
.priv_data_size = sizeof(ArgoCVGDemuxContext),
.read_probe = argo_cvg_probe,
.read_header = argo_cvg_read_header,
.read_packet = argo_cvg_read_packet,
.read_seek = argo_cvg_seek,
};

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@ -32,8 +32,8 @@
// 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 59
#define LIBAVFORMAT_VERSION_MINOR 0
#define LIBAVFORMAT_VERSION_MICRO 101
#define LIBAVFORMAT_VERSION_MINOR 1
#define LIBAVFORMAT_VERSION_MICRO 100
#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
LIBAVFORMAT_VERSION_MINOR, \