/src/ffmpeg/libavformat/argo_cvg.c

Source
/*
 * Argonaut Games CVG (de)muxer
 *
 * 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 "config_components.h"

#include "libavutil/avstring.h"
#include "libavutil/channel_layout.h"
#include "avformat.h"
#include "avio_internal.h"
#include "demux.h"
#include "internal.h"
#include "mux.h"
#include "libavutil/opt.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 loop;   /*< Loop flag. */
    uint32_t reverb; /*< Reverb flag. */
} ArgoCVGHeader;

typedef struct ArgoCVGDemuxContext {
    ArgoCVGHeader header;
    uint32_t      checksum;
    uint32_t      num_blocks;
    uint32_t      blocks_read;
} ArgoCVGDemuxContext;

typedef struct ArgoCVGMuxContext {
    const AVClass *class;
    int           skip_rate_check;
    int           loop;
    int           reverb;
    uint32_t      checksum;
    size_t        size;
} ArgoCVGMuxContext;

#if CONFIG_ARGO_CVG_DEMUXER
/* "Special" files that are played at a different rate. */
//  FILE(NAME, SIZE, LOOP, REVERB, CHECKSUM, SAMPLE_RATE)
#define OVERRIDE_FILES(FILE)                               \
    FILE(CRYS,     23592, 0, 1, 2495499, 88200) /* Beta */ \
    FILE(REDCRY88, 38280, 0, 1, 4134848, 88200) /* Beta */ \
    FILE(DANLOOP1, 54744, 1, 0, 5684641, 37800) /* Beta */ \
    FILE(PICKUP88, 12904, 0, 1, 1348091, 48000) /* Beta */ \
    FILE(SELECT1,   5080, 0, 1,  549987, 44100) /* Beta */ \

#define MAX_FILENAME_SIZE(NAME, SIZE, LOOP, REVERB, CHECKSUM, SAMPLE_RATE) \
    MAX_SIZE_BEFORE_ ## NAME,                                  \
    MAX_SIZE_UNTIL_ ## NAME ## _MINUS1 = FFMAX(sizeof(#NAME ".CVG"), MAX_SIZE_BEFORE_ ## NAME) - 1,
enum {
    OVERRIDE_FILES(MAX_FILENAME_SIZE)
    MAX_OVERRIDE_FILENAME_SIZE
};

typedef struct ArgoCVGOverride {
    const char    name[MAX_OVERRIDE_FILENAME_SIZE];
    ArgoCVGHeader header;
    uint32_t      checksum;
    int           sample_rate;
} ArgoCVGOverride;

#define FILE(NAME, SIZE, LOOP, REVERB, CHECKSUM, SAMPLE_RATE) \
    { #NAME ".CVG", { SIZE, LOOP, REVERB }, CHECKSUM, SAMPLE_RATE },
static const ArgoCVGOverride overrides[] = {
    OVERRIDE_FILES(FILE)
};

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.loop   = AV_RL32(p->buf + 4);
    cvg.reverb = AV_RL32(p->buf + 8);

    if (cvg.size < 8)
        return 0;

    if (cvg.loop != 0 && cvg.loop != 1)
        return 0;

    if (cvg.reverb != 0 && cvg.reverb != 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 = ffio_read_size(pb, buf, sizeof(buf))) < 0)
        return ret;

    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 = ffio_read_size(s->pb, buf, ARGO_CVG_HEADER_SIZE)) < 0)
        return ret;

    ctx->header.size   = AV_RL32(buf + 0);
    ctx->header.loop   = AV_RL32(buf + 4);
    ctx->header.reverb = AV_RL32(buf + 8);

    if (ctx->header.size < 8)
        return AVERROR_INVALIDDATA;

    if ((ret = argo_cvg_read_checksum(s->pb, &ctx->header, &ctx->checksum)) < 0)
        return ret;

    if ((ret = av_dict_set_int(&st->metadata, "loop", ctx->header.loop, 0)) < 0)
        return ret;

    if ((ret = av_dict_set_int(&st->metadata, "reverb", ctx->header.reverb, 0)) < 0)
        return ret;

    if ((ret = av_dict_set_int(&st->metadata, "checksum", ctx->checksum, 0)) < 0)
        return ret;

    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.loop   != ctx->header.loop ||
            ovr->header.reverb != ctx->header.reverb ||
            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->ch_layout              = (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO;

    par->bits_per_coded_sample  = 4;
    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 FFInputFormat ff_argo_cvg_demuxer = {
    .p.name         = "argo_cvg",
    .p.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,
};
#endif

#if CONFIG_ARGO_CVG_MUXER
static int argo_cvg_write_init(AVFormatContext *s)
{
    ArgoCVGMuxContext *ctx = s->priv_data;
    const AVCodecParameters *par = s->streams[0]->codecpar;

    if (par->ch_layout.nb_channels != 1) {
        av_log(s, AV_LOG_ERROR, "CVG files only support 1 channel\n");
        return AVERROR(EINVAL);
    }

    if (par->block_align != ARGO_CVG_BLOCK_ALIGN)
        return AVERROR(EINVAL);

    if (!ctx->skip_rate_check && par->sample_rate != 22050) {
        av_log(s, AV_LOG_ERROR, "Sample rate must be 22050\n");
        return AVERROR(EINVAL);
    }

    if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL)) {
        av_log(s, AV_LOG_ERROR, "Stream not seekable, unable to write output file\n");
        return AVERROR(EINVAL);
    }

    return 0;
}

static int argo_cvg_write_header(AVFormatContext *s)
{
    ArgoCVGMuxContext *ctx = s->priv_data;

    avio_wl32(s->pb, 0); /* Size, fixed later. */
    avio_wl32(s->pb, !!ctx->loop);
    avio_wl32(s->pb, !!ctx->reverb);

    ctx->checksum = !!ctx->loop + !!ctx->reverb;
    ctx->size     = 8;
    return 0;
}

static int argo_cvg_write_packet(AVFormatContext *s, AVPacket *pkt)
{
    ArgoCVGMuxContext *ctx = s->priv_data;
    AVCodecParameters *par = s->streams[0]->codecpar;

    if (pkt->size % par->block_align != 0)
        return AVERROR_INVALIDDATA;

    avio_write(s->pb, pkt->data, pkt->size);

    ctx->size += pkt->size;

    if (ctx->size > UINT32_MAX)
        return AVERROR_INVALIDDATA;

    for (int i = 0; i < pkt->size; i++)
        ctx->checksum += pkt->data[i];

    return 0;
}

static int argo_cvg_write_trailer(AVFormatContext *s)
{
    ArgoCVGMuxContext *ctx = s->priv_data;
    int64_t ret;

    ctx->checksum +=  (ctx->size      & 255)
                   + ((ctx->size>> 8) & 255)
                   + ((ctx->size>>16) & 255)
                   +  (ctx->size>>24);

    av_log(s, AV_LOG_TRACE, "size     = %zu\n", ctx->size);
    av_log(s, AV_LOG_TRACE, "checksum = %u\n",  ctx->checksum);

    avio_wl32(s->pb, ctx->checksum);

    if ((ret = avio_seek(s->pb, 0, SEEK_SET)) < 0)
        return ret;

    avio_wl32(s->pb, (uint32_t)ctx->size);
    return 0;
}

static const AVOption argo_cvg_options[] = {
    {
        .name        = "skip_rate_check",
        .help        = "skip sample rate check",
        .offset      = offsetof(ArgoCVGMuxContext, skip_rate_check),
        .type        = AV_OPT_TYPE_BOOL,
        .default_val = {.i64 = 0},
        .min         = 0,
        .max         = 1,
        .flags       = AV_OPT_FLAG_ENCODING_PARAM
    },
    {
        .name        = "loop",
        .help        = "set loop flag",
        .offset      = offsetof(ArgoCVGMuxContext, loop),
        .type        = AV_OPT_TYPE_BOOL,
        .default_val = {.i64 = 0},
        .min         = 0,
        .max         = 1,
        .flags       = AV_OPT_FLAG_ENCODING_PARAM
    },
        {
        .name        = "reverb",
        .help        = "set reverb flag",
        .offset      = offsetof(ArgoCVGMuxContext, reverb),
        .type        = AV_OPT_TYPE_BOOL,
        .default_val = {.i64 = 1},
        .min         = 0,
        .max         = 1,
        .flags       = AV_OPT_FLAG_ENCODING_PARAM
    },
    { NULL }
};

static const AVClass argo_cvg_muxer_class = {
    .class_name = "argo_cvg_muxer",
    .item_name  = av_default_item_name,
    .option     = argo_cvg_options,
    .version    = LIBAVUTIL_VERSION_INT
};

const FFOutputFormat ff_argo_cvg_muxer = {
    .p.name         = "argo_cvg",
    .p.long_name    = NULL_IF_CONFIG_SMALL("Argonaut Games CVG"),
    .p.extensions   = "cvg",
    .p.audio_codec  = AV_CODEC_ID_ADPCM_PSX,
    .p.video_codec  = AV_CODEC_ID_NONE,
    .p.subtitle_codec = AV_CODEC_ID_NONE,
    .p.priv_class   = &argo_cvg_muxer_class,
    .flags_internal   = FF_OFMT_FLAG_MAX_ONE_OF_EACH |
                        FF_OFMT_FLAG_ONLY_DEFAULT_CODECS,
    .init           = argo_cvg_write_init,
    .write_header   = argo_cvg_write_header,
    .write_packet   = argo_cvg_write_packet,
    .write_trailer  = argo_cvg_write_trailer,
    .priv_data_size = sizeof(ArgoCVGMuxContext),
};
#endif

Coverage Report

Created: 2026-01-16 07:48

Line	Count	Source
1		/*
2		* Argonaut Games CVG (de)muxer
3		*
4		* Copyright (C) 2021 Zane van Iperen (zane@zanevaniperen.com)
5		*
6		* This file is part of FFmpeg.
7		*
8		* FFmpeg is free software; you can redistribute it and/or
9		* modify it under the terms of the GNU Lesser General Public
10		* License as published by the Free Software Foundation; either
11		* version 2.1 of the License, or (at your option) any later version.
12		*
13		* FFmpeg is distributed in the hope that it will be useful,
14		* but WITHOUT ANY WARRANTY; without even the implied warranty of
15		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16		* Lesser General Public License for more details.
17		*
18		* You should have received a copy of the GNU Lesser General Public
19		* License along with FFmpeg; if not, write to the Free Software
20		* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21		*/
22
23		#include "config_components.h"
24
25		#include "libavutil/avstring.h"
26		#include "libavutil/channel_layout.h"
27		#include "avformat.h"
28		#include "avio_internal.h"
29		#include "demux.h"
30		#include "internal.h"
31		#include "mux.h"
32		#include "libavutil/opt.h"
33		#include "libavutil/intreadwrite.h"
34
35		/*
36		* .CVG files are essentially PSX ADPCM wrapped with a size and checksum.
37		* Found in the PSX versions of the game.
38		*/
39
40	1.33k	#define ARGO_CVG_HEADER_SIZE 12
41	1.47k	#define ARGO_CVG_BLOCK_ALIGN 0x10
42		#define ARGO_CVG_NB_BLOCKS 32
43	79.2k	#define ARGO_CVG_SAMPLES_PER_BLOCK 28
44
45		typedef struct ArgoCVGHeader {
46		uint32_t size; /< File size -8 (this + trailing checksum) /
47		uint32_t loop; /< Loop flag. /
48		uint32_t reverb; /< Reverb flag. /
49		} ArgoCVGHeader;
50
51		typedef struct ArgoCVGDemuxContext {
52		ArgoCVGHeader header;
53		uint32_t checksum;
54		uint32_t num_blocks;
55		uint32_t blocks_read;
56		} ArgoCVGDemuxContext;
57
58		typedef struct ArgoCVGMuxContext {
59		const AVClass *class;
60		int skip_rate_check;
61		int loop;
62		int reverb;
63		uint32_t checksum;
64		size_t size;
65		} ArgoCVGMuxContext;
66
67		#if CONFIG_ARGO_CVG_DEMUXER
68		/* "Special" files that are played at a different rate. */
69		// FILE(NAME, SIZE, LOOP, REVERB, CHECKSUM, SAMPLE_RATE)
70		#define OVERRIDE_FILES(FILE) \
71		FILE(CRYS, 23592, 0, 1, 2495499, 88200) /* Beta */ \
72		FILE(REDCRY88, 38280, 0, 1, 4134848, 88200) /* Beta */ \
73		FILE(DANLOOP1, 54744, 1, 0, 5684641, 37800) /* Beta */ \
74		FILE(PICKUP88, 12904, 0, 1, 1348091, 48000) /* Beta */ \
75		FILE(SELECT1, 5080, 0, 1, 549987, 44100) /* Beta */ \
76
77		#define MAX_FILENAME_SIZE(NAME, SIZE, LOOP, REVERB, CHECKSUM, SAMPLE_RATE) \
78		MAX_SIZE_BEFORE_ ## NAME, \
79		MAX_SIZE_UNTIL_ ## NAME ## _MINUS1 = FFMAX(sizeof(#NAME ".CVG"), MAX_SIZE_BEFORE_ ## NAME) - 1,
80		enum {
81		OVERRIDE_FILES(MAX_FILENAME_SIZE)
82		MAX_OVERRIDE_FILENAME_SIZE
83		};
84
85		typedef struct ArgoCVGOverride {
86		const char name[MAX_OVERRIDE_FILENAME_SIZE];
87		ArgoCVGHeader header;
88		uint32_t checksum;
89		int sample_rate;
90		} ArgoCVGOverride;
91
92		#define FILE(NAME, SIZE, LOOP, REVERB, CHECKSUM, SAMPLE_RATE) \
93		{ #NAME ".CVG", { SIZE, LOOP, REVERB }, CHECKSUM, SAMPLE_RATE },
94		static const ArgoCVGOverride overrides[] = {
95		OVERRIDE_FILES(FILE)
96		};
97
98		static int argo_cvg_probe(const AVProbeData *p)
99	958k	{
100	958k	ArgoCVGHeader cvg;
101
102		/*
103		* It's almost impossible to detect these files based
104		* on the header alone. File extension is (unfortunately)
105		* the best way forward.
106		*/
107	958k	if (!av_match_ext(p->filename, "cvg"))
108	958k	return 0;
109
110	0	if (p->buf_size < ARGO_CVG_HEADER_SIZE)
111	0	return 0;
112
113	0	cvg.size = AV_RL32(p->buf + 0);
114	0	cvg.loop = AV_RL32(p->buf + 4);
115	0	cvg.reverb = AV_RL32(p->buf + 8);
116
117	0	if (cvg.size < 8)
118	0	return 0;
119
120	0	if (cvg.loop != 0 && cvg.loop != 1)
121	0	return 0;
122
123	0	if (cvg.reverb != 0 && cvg.reverb != 1)
124	0	return 0;
125
126	0	return AVPROBE_SCORE_MAX / 4 + 1;
127	0	}
128
129		static int argo_cvg_read_checksum(AVIOContext pb, const ArgoCVGHeader cvg, uint32_t *checksum)
130	923	{
131	923	int ret;
132	923	uint8_t buf[4];
133
134	923	if (!(pb->seekable & AVIO_SEEKABLE_NORMAL)) {
135	463	*checksum = 0;
136	463	return 0;
137	463	}
138
139	460	if ((ret = avio_seek(pb, cvg->size + 4, SEEK_SET)) < 0)
140	131	return ret;
141
142		/* NB: Not using avio_rl32() because no error checking. */
143	329	if ((ret = ffio_read_size(pb, buf, sizeof(buf))) < 0)
144	47	return ret;
145
146	282	if ((ret = avio_seek(pb, ARGO_CVG_HEADER_SIZE, SEEK_SET)) < 0)
147	9	return ret;
148
149	273	*checksum = AV_RL32(buf);
150	273	return 0;
151	282	}
152
153		static int argo_cvg_read_header(AVFormatContext *s)
154	1.05k	{
155	1.05k	int ret;
156	1.05k	AVStream *st;
157	1.05k	AVCodecParameters *par;
158	1.05k	uint8_t buf[ARGO_CVG_HEADER_SIZE];
159	1.05k	const char *filename = av_basename(s->url);
160	1.05k	ArgoCVGDemuxContext *ctx = s->priv_data;
161
162	1.05k	if (!(st = avformat_new_stream(s, NULL)))
163	0	return AVERROR(ENOMEM);
164
165	1.05k	if ((ret = ffio_read_size(s->pb, buf, ARGO_CVG_HEADER_SIZE)) < 0)
166	127	return ret;
167
168	928	ctx->header.size = AV_RL32(buf + 0);
169	928	ctx->header.loop = AV_RL32(buf + 4);
170	928	ctx->header.reverb = AV_RL32(buf + 8);
171
172	928	if (ctx->header.size < 8)
173	5	return AVERROR_INVALIDDATA;
174
175	923	if ((ret = argo_cvg_read_checksum(s->pb, &ctx->header, &ctx->checksum)) < 0)
176	187	return ret;
177
178	736	if ((ret = av_dict_set_int(&st->metadata, "loop", ctx->header.loop, 0)) < 0)
179	0	return ret;
180
181	736	if ((ret = av_dict_set_int(&st->metadata, "reverb", ctx->header.reverb, 0)) < 0)
182	0	return ret;
183
184	736	if ((ret = av_dict_set_int(&st->metadata, "checksum", ctx->checksum, 0)) < 0)
185	0	return ret;
186
187	736	par = st->codecpar;
188	736	par->codec_type = AVMEDIA_TYPE_AUDIO;
189	736	par->codec_id = AV_CODEC_ID_ADPCM_PSX;
190	736	par->sample_rate = 22050;
191
192	4.41k	for (size_t i = 0; i < FF_ARRAY_ELEMS(overrides); i++) {
193	3.68k	const ArgoCVGOverride *ovr = overrides + i;
194	3.68k	if (ovr->header.size != ctx->header.size \|\|
195	181	ovr->header.loop != ctx->header.loop \|\|
196	138	ovr->header.reverb != ctx->header.reverb \|\|
197	91	ovr->checksum != ctx->checksum \|\|
198	32	av_strcasecmp(filename, ovr->name) != 0)
199	3.68k	continue;
200
201	0	av_log(s, AV_LOG_TRACE, "found override, name = %s\n", ovr->name);
202	0	par->sample_rate = ovr->sample_rate;
203	0	break;
204	3.68k	}
205
206	736	par->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO;
207
208	736	par->bits_per_coded_sample = 4;
209	736	par->block_align = ARGO_CVG_BLOCK_ALIGN;
210	736	par->bit_rate = par->sample_rate * par->bits_per_coded_sample;
211
212	736	ctx->num_blocks = (ctx->header.size - 8) / ARGO_CVG_BLOCK_ALIGN;
213
214	736	av_log(s, AV_LOG_TRACE, "num blocks = %u\n", ctx->num_blocks);
215
216	736	avpriv_set_pts_info(st, 64, 1, par->sample_rate);
217
218	736	st->start_time = 0;
219	736	st->duration = ctx->num_blocks * ARGO_CVG_SAMPLES_PER_BLOCK;
220	736	st->nb_frames = ctx->num_blocks;
221	736	return 0;
222	736	}
223
224		static int argo_cvg_read_packet(AVFormatContext s, AVPacket pkt)
225	40.4k	{
226	40.4k	int ret;
227	40.4k	AVStream *st = s->streams[0];
228	40.4k	ArgoCVGDemuxContext *ctx = s->priv_data;
229
230	40.4k	if (ctx->blocks_read >= ctx->num_blocks)
231	154	return AVERROR_EOF;
232
233	40.3k	ret = av_get_packet(s->pb, pkt, st->codecpar->block_align *
234	40.3k	FFMIN(ARGO_CVG_NB_BLOCKS, ctx->num_blocks - ctx->blocks_read));
235
236	40.3k	if (ret < 0)
237	894	return ret;
238
239	39.4k	if (ret % st->codecpar->block_align != 0)
240	174	return AVERROR_INVALIDDATA;
241
242	39.2k	pkt->stream_index = 0;
243	39.2k	pkt->duration = ARGO_CVG_SAMPLES_PER_BLOCK * (ret / st->codecpar->block_align);
244	39.2k	pkt->pts = ctx->blocks_read * ARGO_CVG_SAMPLES_PER_BLOCK;
245	39.2k	pkt->flags &= ~AV_PKT_FLAG_CORRUPT;
246
247	39.2k	ctx->blocks_read += ret / st->codecpar->block_align;
248
249	39.2k	return 0;
250	39.4k	}
251
252		static int argo_cvg_seek(AVFormatContext *s, int stream_index,
253		int64_t pts, int flags)
254	0	{
255	0	int64_t ret;
256	0	ArgoCVGDemuxContext *ctx = s->priv_data;
257
258	0	if (pts != 0 \|\| stream_index != 0)
259	0	return AVERROR(EINVAL);
260
261	0	if ((ret = avio_seek(s->pb, ARGO_CVG_HEADER_SIZE, SEEK_SET)) < 0)
262	0	return ret;
263
264	0	ctx->blocks_read = 0;
265	0	return 0;
266	0	}
267
268		const FFInputFormat ff_argo_cvg_demuxer = {
269		.p.name = "argo_cvg",
270		.p.long_name = NULL_IF_CONFIG_SMALL("Argonaut Games CVG"),
271		.priv_data_size = sizeof(ArgoCVGDemuxContext),
272		.read_probe = argo_cvg_probe,
273		.read_header = argo_cvg_read_header,
274		.read_packet = argo_cvg_read_packet,
275		.read_seek = argo_cvg_seek,
276		};
277		#endif
278
279		#if CONFIG_ARGO_CVG_MUXER
280		static int argo_cvg_write_init(AVFormatContext *s)
281		{
282		ArgoCVGMuxContext *ctx = s->priv_data;
283		const AVCodecParameters *par = s->streams[0]->codecpar;
284
285		if (par->ch_layout.nb_channels != 1) {
286		av_log(s, AV_LOG_ERROR, "CVG files only support 1 channel\n");
287		return AVERROR(EINVAL);
288		}
289
290		if (par->block_align != ARGO_CVG_BLOCK_ALIGN)
291		return AVERROR(EINVAL);
292
293		if (!ctx->skip_rate_check && par->sample_rate != 22050) {
294		av_log(s, AV_LOG_ERROR, "Sample rate must be 22050\n");
295		return AVERROR(EINVAL);
296		}
297
298		if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL)) {
299		av_log(s, AV_LOG_ERROR, "Stream not seekable, unable to write output file\n");
300		return AVERROR(EINVAL);
301		}
302
303		return 0;
304		}
305
306		static int argo_cvg_write_header(AVFormatContext *s)
307		{
308		ArgoCVGMuxContext *ctx = s->priv_data;
309
310		avio_wl32(s->pb, 0); /* Size, fixed later. */
311		avio_wl32(s->pb, !!ctx->loop);
312		avio_wl32(s->pb, !!ctx->reverb);
313
314		ctx->checksum = !!ctx->loop + !!ctx->reverb;
315		ctx->size = 8;
316		return 0;
317		}
318
319		static int argo_cvg_write_packet(AVFormatContext s, AVPacket pkt)
320		{
321		ArgoCVGMuxContext *ctx = s->priv_data;
322		AVCodecParameters *par = s->streams[0]->codecpar;
323
324		if (pkt->size % par->block_align != 0)
325		return AVERROR_INVALIDDATA;
326
327		avio_write(s->pb, pkt->data, pkt->size);
328
329		ctx->size += pkt->size;
330
331		if (ctx->size > UINT32_MAX)
332		return AVERROR_INVALIDDATA;
333
334		for (int i = 0; i < pkt->size; i++)
335		ctx->checksum += pkt->data[i];
336
337		return 0;
338		}
339
340		static int argo_cvg_write_trailer(AVFormatContext *s)
341		{
342		ArgoCVGMuxContext *ctx = s->priv_data;
343		int64_t ret;
344
345		ctx->checksum += (ctx->size & 255)
346		+ ((ctx->size>> 8) & 255)
347		+ ((ctx->size>>16) & 255)
348		+ (ctx->size>>24);
349
350		av_log(s, AV_LOG_TRACE, "size = %zu\n", ctx->size);
351		av_log(s, AV_LOG_TRACE, "checksum = %u\n", ctx->checksum);
352
353		avio_wl32(s->pb, ctx->checksum);
354
355		if ((ret = avio_seek(s->pb, 0, SEEK_SET)) < 0)
356		return ret;
357
358		avio_wl32(s->pb, (uint32_t)ctx->size);
359		return 0;
360		}
361
362		static const AVOption argo_cvg_options[] = {
363		{
364		.name = "skip_rate_check",
365		.help = "skip sample rate check",
366		.offset = offsetof(ArgoCVGMuxContext, skip_rate_check),
367		.type = AV_OPT_TYPE_BOOL,
368		.default_val = {.i64 = 0},
369		.min = 0,
370		.max = 1,
371		.flags = AV_OPT_FLAG_ENCODING_PARAM
372		},
373		{
374		.name = "loop",
375		.help = "set loop flag",
376		.offset = offsetof(ArgoCVGMuxContext, loop),
377		.type = AV_OPT_TYPE_BOOL,
378		.default_val = {.i64 = 0},
379		.min = 0,
380		.max = 1,
381		.flags = AV_OPT_FLAG_ENCODING_PARAM
382		},
383		{
384		.name = "reverb",
385		.help = "set reverb flag",
386		.offset = offsetof(ArgoCVGMuxContext, reverb),
387		.type = AV_OPT_TYPE_BOOL,
388		.default_val = {.i64 = 1},
389		.min = 0,
390		.max = 1,
391		.flags = AV_OPT_FLAG_ENCODING_PARAM
392		},
393		{ NULL }
394		};
395
396		static const AVClass argo_cvg_muxer_class = {
397		.class_name = "argo_cvg_muxer",
398		.item_name = av_default_item_name,
399		.option = argo_cvg_options,
400		.version = LIBAVUTIL_VERSION_INT
401		};
402
403		const FFOutputFormat ff_argo_cvg_muxer = {
404		.p.name = "argo_cvg",
405		.p.long_name = NULL_IF_CONFIG_SMALL("Argonaut Games CVG"),
406		.p.extensions = "cvg",
407		.p.audio_codec = AV_CODEC_ID_ADPCM_PSX,
408		.p.video_codec = AV_CODEC_ID_NONE,
409		.p.subtitle_codec = AV_CODEC_ID_NONE,
410		.p.priv_class = &argo_cvg_muxer_class,
411		.flags_internal = FF_OFMT_FLAG_MAX_ONE_OF_EACH \|
412		FF_OFMT_FLAG_ONLY_DEFAULT_CODECS,
413		.init = argo_cvg_write_init,
414		.write_header = argo_cvg_write_header,
415		.write_packet = argo_cvg_write_packet,
416		.write_trailer = argo_cvg_write_trailer,
417		.priv_data_size = sizeof(ArgoCVGMuxContext),
418		};
419		#endif