/src/ffmpeg/libavformat/argo_cvg.c

Source (jump to first uncovered line)
/*
 * 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 "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 = 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.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: 2024-09-06 07:53

Line	Count	Source (jump to first uncovered line)
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 "demux.h"
29		#include "internal.h"
30		#include "mux.h"
31		#include "libavutil/opt.h"
32		#include "libavutil/intreadwrite.h"
33
34		/*
35		* .CVG files are essentially PSX ADPCM wrapped with a size and checksum.
36		* Found in the PSX versions of the game.
37		*/
38
39	6.20k	#define ARGO_CVG_HEADER_SIZE 12
40	1.09k	#define ARGO_CVG_BLOCK_ALIGN 0x10
41		#define ARGO_CVG_NB_BLOCKS 32
42	61.2k	#define ARGO_CVG_SAMPLES_PER_BLOCK 28
43
44		typedef struct ArgoCVGHeader {
45		uint32_t size; /< File size -8 (this + trailing checksum) /
46		uint32_t loop; /< Loop flag. /
47		uint32_t reverb; /< Reverb flag. /
48		} ArgoCVGHeader;
49
50		typedef struct ArgoCVGDemuxContext {
51		ArgoCVGHeader header;
52		uint32_t checksum;
53		uint32_t num_blocks;
54		uint32_t blocks_read;
55		} ArgoCVGDemuxContext;
56
57		typedef struct ArgoCVGMuxContext {
58		const AVClass *class;
59		int skip_rate_check;
60		int loop;
61		int reverb;
62		uint32_t checksum;
63		size_t size;
64		} ArgoCVGMuxContext;
65
66		#if CONFIG_ARGO_CVG_DEMUXER
67		/* "Special" files that are played at a different rate. */
68		// FILE(NAME, SIZE, LOOP, REVERB, CHECKSUM, SAMPLE_RATE)
69		#define OVERRIDE_FILES(FILE) \
70		FILE(CRYS, 23592, 0, 1, 2495499, 88200) /* Beta */ \
71		FILE(REDCRY88, 38280, 0, 1, 4134848, 88200) /* Beta */ \
72		FILE(DANLOOP1, 54744, 1, 0, 5684641, 37800) /* Beta */ \
73		FILE(PICKUP88, 12904, 0, 1, 1348091, 48000) /* Beta */ \
74		FILE(SELECT1, 5080, 0, 1, 549987, 44100) /* Beta */ \
75
76		#define MAX_FILENAME_SIZE(NAME, SIZE, LOOP, REVERB, CHECKSUM, SAMPLE_RATE) \
77		MAX_SIZE_BEFORE_ ## NAME, \
78		MAX_SIZE_UNTIL_ ## NAME ## _MINUS1 = FFMAX(sizeof(#NAME ".CVG"), MAX_SIZE_BEFORE_ ## NAME) - 1,
79		enum {
80		OVERRIDE_FILES(MAX_FILENAME_SIZE)
81		MAX_OVERRIDE_FILENAME_SIZE
82		};
83
84		typedef struct ArgoCVGOverride {
85		const char name[MAX_OVERRIDE_FILENAME_SIZE];
86		ArgoCVGHeader header;
87		uint32_t checksum;
88		int sample_rate;
89		} ArgoCVGOverride;
90
91		#define FILE(NAME, SIZE, LOOP, REVERB, CHECKSUM, SAMPLE_RATE) \
92		{ #NAME ".CVG", { SIZE, LOOP, REVERB }, CHECKSUM, SAMPLE_RATE },
93		static const ArgoCVGOverride overrides[] = {
94		OVERRIDE_FILES(FILE)
95		};
96
97		static int argo_cvg_probe(const AVProbeData *p)
98	358k	{
99	358k	ArgoCVGHeader cvg;
100
101		/*
102		* It's almost impossible to detect these files based
103		* on the header alone. File extension is (unfortunately)
104		* the best way forward.
105		*/
106	358k	if (!av_match_ext(p->filename, "cvg"))
107	358k	return 0;
108
109	0	if (p->buf_size < ARGO_CVG_HEADER_SIZE)
110	0	return 0;
111
112	0	cvg.size = AV_RL32(p->buf + 0);
113	0	cvg.loop = AV_RL32(p->buf + 4);
114	0	cvg.reverb = AV_RL32(p->buf + 8);
115
116	0	if (cvg.size < 8)
117	0	return 0;
118
119	0	if (cvg.loop != 0 && cvg.loop != 1)
120	0	return 0;
121
122	0	if (cvg.reverb != 0 && cvg.reverb != 1)
123	0	return 0;
124
125	0	return AVPROBE_SCORE_MAX / 4 + 1;
126	0	}
127
128		static int argo_cvg_read_checksum(AVIOContext pb, const ArgoCVGHeader cvg, uint32_t *checksum)
129	639	{
130	639	int ret;
131	639	uint8_t buf[4];
132
133	639	if (!(pb->seekable & AVIO_SEEKABLE_NORMAL)) {
134	395	*checksum = 0;
135	395	return 0;
136	395	}
137
138	244	if ((ret = avio_seek(pb, cvg->size + 4, SEEK_SET)) < 0)
139	63	return ret;
140
141		/* NB: Not using avio_rl32() because no error checking. */
142	181	if ((ret = avio_read(pb, buf, sizeof(buf))) < 0)
143	16	return ret;
144	165	else if (ret != sizeof(buf))
145	8	return AVERROR(EIO);
146
147	157	if ((ret = avio_seek(pb, ARGO_CVG_HEADER_SIZE, SEEK_SET)) < 0)
148	4	return ret;
149
150	153	*checksum = AV_RL32(buf);
151	153	return 0;
152	157	}
153
154		static int argo_cvg_read_header(AVFormatContext *s)
155	5.13k	{
156	5.13k	int ret;
157	5.13k	AVStream *st;
158	5.13k	AVCodecParameters *par;
159	5.13k	uint8_t buf[ARGO_CVG_HEADER_SIZE];
160	5.13k	const char *filename = av_basename(s->url);
161	5.13k	ArgoCVGDemuxContext *ctx = s->priv_data;
162
163	5.13k	if (!(st = avformat_new_stream(s, NULL)))
164	0	return AVERROR(ENOMEM);
165
166	5.13k	if ((ret = avio_read(s->pb, buf, ARGO_CVG_HEADER_SIZE)) < 0)
167	4.22k	return ret;
168	915	else if (ret != ARGO_CVG_HEADER_SIZE)
169	266	return AVERROR(EIO);
170
171	649	ctx->header.size = AV_RL32(buf + 0);
172	649	ctx->header.loop = AV_RL32(buf + 4);
173	649	ctx->header.reverb = AV_RL32(buf + 8);
174
175	649	if (ctx->header.size < 8)
176	10	return AVERROR_INVALIDDATA;
177
178	639	if ((ret = argo_cvg_read_checksum(s->pb, &ctx->header, &ctx->checksum)) < 0)
179	91	return ret;
180
181	548	if ((ret = av_dict_set_int(&st->metadata, "loop", ctx->header.loop, 0)) < 0)
182	0	return ret;
183
184	548	if ((ret = av_dict_set_int(&st->metadata, "reverb", ctx->header.reverb, 0)) < 0)
185	0	return ret;
186
187	548	if ((ret = av_dict_set_int(&st->metadata, "checksum", ctx->checksum, 0)) < 0)
188	0	return ret;
189
190	548	par = st->codecpar;
191	548	par->codec_type = AVMEDIA_TYPE_AUDIO;
192	548	par->codec_id = AV_CODEC_ID_ADPCM_PSX;
193	548	par->sample_rate = 22050;
194
195	3.28k	for (size_t i = 0; i < FF_ARRAY_ELEMS(overrides); i++) {
196	2.74k	const ArgoCVGOverride *ovr = overrides + i;
197	2.74k	if (ovr->header.size != ctx->header.size \|\|
198	2.74k	ovr->header.loop != ctx->header.loop \|\|
199	2.74k	ovr->header.reverb != ctx->header.reverb \|\|
200	2.74k	ovr->checksum != ctx->checksum \|\|
201	2.74k	av_strcasecmp(filename, ovr->name) != 0)
202	2.74k	continue;
203
204	0	av_log(s, AV_LOG_TRACE, "found override, name = %s\n", ovr->name);
205	0	par->sample_rate = ovr->sample_rate;
206	0	break;
207	2.74k	}
208
209	548	par->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO;
210
211	548	par->bits_per_coded_sample = 4;
212	548	par->block_align = ARGO_CVG_BLOCK_ALIGN;
213	548	par->bit_rate = par->sample_rate * par->bits_per_coded_sample;
214
215	548	ctx->num_blocks = (ctx->header.size - 8) / ARGO_CVG_BLOCK_ALIGN;
216
217	548	av_log(s, AV_LOG_TRACE, "num blocks = %u\n", ctx->num_blocks);
218
219	548	avpriv_set_pts_info(st, 64, 1, par->sample_rate);
220
221	548	st->start_time = 0;
222	548	st->duration = ctx->num_blocks * ARGO_CVG_SAMPLES_PER_BLOCK;
223	548	st->nb_frames = ctx->num_blocks;
224	548	return 0;
225	548	}
226
227		static int argo_cvg_read_packet(AVFormatContext s, AVPacket pkt)
228	31.2k	{
229	31.2k	int ret;
230	31.2k	AVStream *st = s->streams[0];
231	31.2k	ArgoCVGDemuxContext *ctx = s->priv_data;
232
233	31.2k	if (ctx->blocks_read >= ctx->num_blocks)
234	138	return AVERROR_EOF;
235
236	31.0k	ret = av_get_packet(s->pb, pkt, st->codecpar->block_align *
237	31.0k	FFMIN(ARGO_CVG_NB_BLOCKS, ctx->num_blocks - ctx->blocks_read));
238
239	31.0k	if (ret < 0)
240	585	return ret;
241
242	30.5k	if (ret % st->codecpar->block_align != 0)
243	174	return AVERROR_INVALIDDATA;
244
245	30.3k	pkt->stream_index = 0;
246	30.3k	pkt->duration = ARGO_CVG_SAMPLES_PER_BLOCK * (ret / st->codecpar->block_align);
247	30.3k	pkt->pts = ctx->blocks_read * ARGO_CVG_SAMPLES_PER_BLOCK;
248	30.3k	pkt->flags &= ~AV_PKT_FLAG_CORRUPT;
249
250	30.3k	ctx->blocks_read += ret / st->codecpar->block_align;
251
252	30.3k	return 0;
253	30.5k	}
254
255		static int argo_cvg_seek(AVFormatContext *s, int stream_index,
256		int64_t pts, int flags)
257	0	{
258	0	int64_t ret;
259	0	ArgoCVGDemuxContext *ctx = s->priv_data;
260
261	0	if (pts != 0 \|\| stream_index != 0)
262	0	return AVERROR(EINVAL);
263
264	0	if ((ret = avio_seek(s->pb, ARGO_CVG_HEADER_SIZE, SEEK_SET)) < 0)
265	0	return ret;
266
267	0	ctx->blocks_read = 0;
268	0	return 0;
269	0	}
270
271		const FFInputFormat ff_argo_cvg_demuxer = {
272		.p.name = "argo_cvg",
273		.p.long_name = NULL_IF_CONFIG_SMALL("Argonaut Games CVG"),
274		.priv_data_size = sizeof(ArgoCVGDemuxContext),
275		.read_probe = argo_cvg_probe,
276		.read_header = argo_cvg_read_header,
277		.read_packet = argo_cvg_read_packet,
278		.read_seek = argo_cvg_seek,
279		};
280		#endif
281
282		#if CONFIG_ARGO_CVG_MUXER
283		static int argo_cvg_write_init(AVFormatContext *s)
284		{
285		ArgoCVGMuxContext *ctx = s->priv_data;
286		const AVCodecParameters *par = s->streams[0]->codecpar;
287
288		if (par->ch_layout.nb_channels != 1) {
289		av_log(s, AV_LOG_ERROR, "CVG files only support 1 channel\n");
290		return AVERROR(EINVAL);
291		}
292
293		if (par->block_align != ARGO_CVG_BLOCK_ALIGN)
294		return AVERROR(EINVAL);
295
296		if (!ctx->skip_rate_check && par->sample_rate != 22050) {
297		av_log(s, AV_LOG_ERROR, "Sample rate must be 22050\n");
298		return AVERROR(EINVAL);
299		}
300
301		if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL)) {
302		av_log(s, AV_LOG_ERROR, "Stream not seekable, unable to write output file\n");
303		return AVERROR(EINVAL);
304		}
305
306		return 0;
307		}
308
309		static int argo_cvg_write_header(AVFormatContext *s)
310		{
311		ArgoCVGMuxContext *ctx = s->priv_data;
312
313		avio_wl32(s->pb, 0); /* Size, fixed later. */
314		avio_wl32(s->pb, !!ctx->loop);
315		avio_wl32(s->pb, !!ctx->reverb);
316
317		ctx->checksum = !!ctx->loop + !!ctx->reverb;
318		ctx->size = 8;
319		return 0;
320		}
321
322		static int argo_cvg_write_packet(AVFormatContext s, AVPacket pkt)
323		{
324		ArgoCVGMuxContext *ctx = s->priv_data;
325		AVCodecParameters *par = s->streams[0]->codecpar;
326
327		if (pkt->size % par->block_align != 0)
328		return AVERROR_INVALIDDATA;
329
330		avio_write(s->pb, pkt->data, pkt->size);
331
332		ctx->size += pkt->size;
333
334		if (ctx->size > UINT32_MAX)
335		return AVERROR_INVALIDDATA;
336
337		for (int i = 0; i < pkt->size; i++)
338		ctx->checksum += pkt->data[i];
339
340		return 0;
341		}
342
343		static int argo_cvg_write_trailer(AVFormatContext *s)
344		{
345		ArgoCVGMuxContext *ctx = s->priv_data;
346		int64_t ret;
347
348		ctx->checksum += (ctx->size & 255)
349		+ ((ctx->size>> 8) & 255)
350		+ ((ctx->size>>16) & 255)
351		+ (ctx->size>>24);
352
353		av_log(s, AV_LOG_TRACE, "size = %zu\n", ctx->size);
354		av_log(s, AV_LOG_TRACE, "checksum = %u\n", ctx->checksum);
355
356		avio_wl32(s->pb, ctx->checksum);
357
358		if ((ret = avio_seek(s->pb, 0, SEEK_SET)) < 0)
359		return ret;
360
361		avio_wl32(s->pb, (uint32_t)ctx->size);
362		return 0;
363		}
364
365		static const AVOption argo_cvg_options[] = {
366		{
367		.name = "skip_rate_check",
368		.help = "skip sample rate check",
369		.offset = offsetof(ArgoCVGMuxContext, skip_rate_check),
370		.type = AV_OPT_TYPE_BOOL,
371		.default_val = {.i64 = 0},
372		.min = 0,
373		.max = 1,
374		.flags = AV_OPT_FLAG_ENCODING_PARAM
375		},
376		{
377		.name = "loop",
378		.help = "set loop flag",
379		.offset = offsetof(ArgoCVGMuxContext, loop),
380		.type = AV_OPT_TYPE_BOOL,
381		.default_val = {.i64 = 0},
382		.min = 0,
383		.max = 1,
384		.flags = AV_OPT_FLAG_ENCODING_PARAM
385		},
386		{
387		.name = "reverb",
388		.help = "set reverb flag",
389		.offset = offsetof(ArgoCVGMuxContext, reverb),
390		.type = AV_OPT_TYPE_BOOL,
391		.default_val = {.i64 = 1},
392		.min = 0,
393		.max = 1,
394		.flags = AV_OPT_FLAG_ENCODING_PARAM
395		},
396		{ NULL }
397		};
398
399		static const AVClass argo_cvg_muxer_class = {
400		.class_name = "argo_cvg_muxer",
401		.item_name = av_default_item_name,
402		.option = argo_cvg_options,
403		.version = LIBAVUTIL_VERSION_INT
404		};
405
406		const FFOutputFormat ff_argo_cvg_muxer = {
407		.p.name = "argo_cvg",
408		.p.long_name = NULL_IF_CONFIG_SMALL("Argonaut Games CVG"),
409		.p.extensions = "cvg",
410		.p.audio_codec = AV_CODEC_ID_ADPCM_PSX,
411		.p.video_codec = AV_CODEC_ID_NONE,
412		.p.subtitle_codec = AV_CODEC_ID_NONE,
413		.p.priv_class = &argo_cvg_muxer_class,
414		.flags_internal = FF_OFMT_FLAG_MAX_ONE_OF_EACH \|
415		FF_OFMT_FLAG_ONLY_DEFAULT_CODECS,
416		.init = argo_cvg_write_init,
417		.write_header = argo_cvg_write_header,
418		.write_packet = argo_cvg_write_packet,
419		.write_trailer = argo_cvg_write_trailer,
420		.priv_data_size = sizeof(ArgoCVGMuxContext),
421		};
422		#endif