aboutsummaryrefslogtreecommitdiffstats
path: root/libavformat/argo_brp.c
blob: 059418cd1d5ce6b74ab2e4988090ab91535a90c1 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
/*
 * Argonaut Games BRP Demuxer
 *
 * Copyright (C) 2020 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"
#include "libavutil/avassert.h"
#include "libavutil/internal.h"
#include "argo_asf.h"

#define BRP_TAG                 MKTAG('B', 'R', 'P', 'P')
#define BRP_FILE_HEADER_SIZE    12
#define BRP_BLOCK_HEADER_SIZE   12
#define BRP_STREAM_HEADER_SIZE  20
#define BRP_MAX_STREAMS         32 /* Soft cap, but even this is overkill. */
#define BRP_BASF_LOOKAHEAD      10 /* How many blocks to search for the first BASF one. */
#define BVID_HEADER_SIZE        16
#define MASK_HEADER_SIZE        12
#define BRP_MIN_BUFFER_SIZE     FFMAX3(FFMAX3(BRP_FILE_HEADER_SIZE,    \
                                              BRP_BLOCK_HEADER_SIZE,   \
                                              BRP_STREAM_HEADER_SIZE), \
                                      BVID_HEADER_SIZE,                \
                                      MASK_HEADER_SIZE)

#define BRP_CODEC_ID_BVID       MKTAG('B', 'V', 'I', 'D')
#define BRP_CODEC_ID_BASF       MKTAG('B', 'A', 'S', 'F')
#define BRP_CODEC_ID_MASK       MKTAG('M', 'A', 'S', 'K')

typedef struct ArgoBRPFileHeader {
    uint32_t magic;
    uint32_t num_streams;
    uint32_t byte_rate;
} ArgoBRPFileHeader;

typedef struct ArgoBRPBlockHeader {
    int32_t  stream_id;
    uint32_t start_ms;
    uint32_t size;
} ArgoBRPBlockHeader;

typedef struct ArgoBVIDHeader {
    uint32_t num_frames;
    uint32_t width;
    uint32_t height;
    uint32_t depth;
} ArgoBVIDHeader;

typedef struct ArgoMASKHeader {
    uint32_t num_frames;
    uint32_t width;
    uint32_t height;
} ArgoMASKHeader;

typedef struct ArgoBRPStreamHeader {
    uint32_t codec_id;
    uint32_t id;
    uint32_t duration_ms;
    uint32_t byte_rate;
    uint32_t extradata_size;
    union
    {
        /* If codec_id == BRP_CODEC_ID_BVID */
        ArgoBVIDHeader    bvid;
        /* If codec_id == BRP_CODEC_ID_BASF */
        ArgoASFFileHeader basf;
        /* If codec_id == BRP_CODEC_ID_MASK */
        ArgoMASKHeader    mask;
    } extradata;
} ArgoBRPStreamHeader;

typedef struct ArgoBRPDemuxContext {
    ArgoBRPFileHeader   fhdr;
    ArgoBRPStreamHeader streams[BRP_MAX_STREAMS];

    struct {
        int                 index;
        ArgoASFChunkHeader  ckhdr;
    } basf;
} ArgoBRPDemuxContext;

static int argo_brp_probe(const AVProbeData *p)
{
    if (AV_RL32(p->buf) != BRP_TAG)
        return 0;

    return AVPROBE_SCORE_EXTENSION + 1;
}

static int read_extradata(AVFormatContext *s, const ArgoBRPStreamHeader *hdr,
                          void *buf, size_t bufsz)
{
    const char *name;
    uint32_t size;
    int64_t ret;

    if (hdr->codec_id == BRP_CODEC_ID_BVID) {
        name = "BVID";
        size = BVID_HEADER_SIZE;
    } else if (hdr->codec_id == BRP_CODEC_ID_BASF) {
        name = "BASF";
        size = ASF_FILE_HEADER_SIZE;
    } else if (hdr->codec_id == BRP_CODEC_ID_MASK) {
        name = "MASK";
        size = MASK_HEADER_SIZE;
    } else {
        avpriv_request_sample(s, "BRP codec id 0x%x", hdr->codec_id);

        if ((ret = avio_skip(s->pb, hdr->extradata_size)) < 0)
            return ret;

        return 1;
    }

    if (hdr->extradata_size != size) {
        av_log(s, AV_LOG_ERROR, "Invalid %s extradata size %u, expected %u\n",
               name, hdr->extradata_size, size);
        return AVERROR_INVALIDDATA;
    }

    av_assert0(bufsz >= size);

    if ((ret = avio_read(s->pb, buf, size)) < 0)
        return ret;

    if (ret != size)
        return AVERROR(EIO);

    return 0;
}

static int argo_brp_read_header(AVFormatContext *s)
{
    int64_t ret;
    AVIOContext *pb = s->pb;
    ArgoBRPDemuxContext *brp = s->priv_data;
    uint8_t buf[FFMAX(BRP_MIN_BUFFER_SIZE, ASF_MIN_BUFFER_SIZE)];

    if ((ret = avio_read(pb, buf, BRP_FILE_HEADER_SIZE)) < 0)
        return ret;
    else if (ret != BRP_FILE_HEADER_SIZE)
        return AVERROR(EIO);

    brp->fhdr.magic       = AV_RL32(buf + 0);
    brp->fhdr.num_streams = AV_RL32(buf + 4);
    brp->fhdr.byte_rate   = AV_RL32(buf + 8);

    if (brp->fhdr.magic != BRP_TAG)
        return AVERROR_INVALIDDATA;

    if (brp->fhdr.num_streams > BRP_MAX_STREAMS) {
        avpriv_request_sample(s, ">%d streams", BRP_MAX_STREAMS);
        return AVERROR_PATCHWELCOME;
    }

    /* Build the stream info. */
    brp->basf.index = -1;
    for (uint32_t i = 0; i < brp->fhdr.num_streams; i++) {
        ArgoBRPStreamHeader *hdr = brp->streams + i;
        AVStream *st;

        if (!(st = avformat_new_stream(s, NULL)))
            return AVERROR(ENOMEM);

        if ((ret = avio_read(pb, buf, BRP_STREAM_HEADER_SIZE)) < 0)
            return ret;
        else if (ret != BRP_STREAM_HEADER_SIZE)
            return AVERROR(EIO);

        hdr->codec_id       = AV_RL32(buf + 0);
        hdr->id             = AV_RL32(buf + 4);
        hdr->duration_ms    = AV_RL32(buf + 8);
        hdr->byte_rate      = AV_RL32(buf + 12);
        hdr->extradata_size = AV_RL32(buf + 16);

        /* This should always be the case. */
        if (hdr->id != i)
            return AVERROR_INVALIDDATA;

        /* Timestamps are in milliseconds. */
        avpriv_set_pts_info(st, 64, 1, 1000);
        st->duration           = hdr->duration_ms;
        st->codecpar->bit_rate = hdr->byte_rate * 8;

        if ((ret = read_extradata(s, hdr, buf, sizeof(buf))) < 0) {
            return ret;
        } else if (ret > 0) {
            st->codecpar->codec_type = AVMEDIA_TYPE_UNKNOWN;
            continue;
        }

        if (hdr->codec_id == BRP_CODEC_ID_BVID) {
            ArgoBVIDHeader *bvid = &hdr->extradata.bvid;

            st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
            st->codecpar->codec_id   = AV_CODEC_ID_ARGO;

            bvid->num_frames = AV_RL32(buf +  0);
            bvid->width      = AV_RL32(buf +  4);
            bvid->height     = AV_RL32(buf +  8);
            bvid->depth      = AV_RL32(buf + 12);

            if (bvid->num_frames == 0)
                return AVERROR_INVALIDDATA;

            /* These are from 1990's games, sanity check this. */
            if (bvid->width >= 65536 || bvid->height >= 65536 ||
                bvid->depth > 24     || bvid->depth % 8 != 0) {
                return AVERROR_INVALIDDATA;
            }

            st->codecpar->width  = bvid->width;
            st->codecpar->height = bvid->height;
            st->nb_frames = bvid->num_frames;
            st->codecpar->bits_per_raw_sample = bvid->depth;
        } else if (hdr->codec_id == BRP_CODEC_ID_BASF) {
            /*
             * It would make the demuxer significantly more complicated
             * to support multiple BASF streams. I've never seen a file
             * with more than one.
             */
            if (brp->basf.index >= 0) {
                avpriv_request_sample(s, "Multiple BASF streams");
                return AVERROR_PATCHWELCOME;
            }

            st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
            st->codecpar->codec_id   = AV_CODEC_ID_ADPCM_ARGO;
            brp->basf.index          = i;
            ff_argo_asf_parse_file_header(&hdr->extradata.basf, buf);

            if ((ret = ff_argo_asf_validate_file_header(s, &hdr->extradata.basf)) < 0)
                return ret;

            st->nb_frames = hdr->extradata.basf.num_chunks;
        } else if (hdr->codec_id == BRP_CODEC_ID_MASK) {
            ArgoMASKHeader *mask = &hdr->extradata.mask;

            st->codecpar->codec_type = AVMEDIA_TYPE_DATA;

            mask->num_frames = AV_RL32(buf + 0);
            mask->width      = AV_RL32(buf + 4);
            mask->height     = AV_RL32(buf + 8);

            st->nb_frames    = mask->num_frames;
        } else {
            av_assert0(0); /* Caught above, should never happen. */
        }
    }

    /* Try to find the first BASF chunk. */
    if (brp->basf.index >= 0) {
        AVStream *st = s->streams[brp->basf.index];
        ArgoBRPStreamHeader *hdr = brp->streams + brp->basf.index;
        ArgoBRPBlockHeader blk;
        int64_t offset;
        int i;

        av_assert0(st->codecpar->codec_id == AV_CODEC_ID_ADPCM_ARGO);
        av_assert0(brp->streams[brp->basf.index].extradata_size == ASF_FILE_HEADER_SIZE);

        if ((ret = avio_tell(s->pb)) < 0)
            return ret;

        offset = ret;

        av_log(s, AV_LOG_TRACE, "Searching %d blocks for BASF...", BRP_BASF_LOOKAHEAD);

        for (i = 0; i < BRP_BASF_LOOKAHEAD; i++) {
            if ((ret = avio_read(pb, buf, BRP_BLOCK_HEADER_SIZE)) < 0)
                return ret;
            else if (ret != BRP_BLOCK_HEADER_SIZE)
                return AVERROR(EIO);

            blk.stream_id = AV_RL32(buf + 0);
            blk.start_ms  = AV_RL32(buf + 4);
            blk.size      = AV_RL32(buf + 8);

            if (blk.stream_id == brp->basf.index || blk.stream_id == -1)
                break;

            if ((ret = avio_skip(pb, blk.size)) < 0)
                return ret;
        }

        if (i == BRP_BASF_LOOKAHEAD || blk.stream_id == -1) {
            /* Don't error here, as there may still be a valid video stream. */
            av_log(s, AV_LOG_TRACE, "not found\n");
            goto done;
        }

        av_log(s, AV_LOG_TRACE, "found at index %d\n", i);

        if (blk.size < ASF_CHUNK_HEADER_SIZE)
            return AVERROR_INVALIDDATA;

        if ((ret = avio_read(pb, buf, ASF_CHUNK_HEADER_SIZE)) < 0)
            return ret;
        else if (ret != ASF_CHUNK_HEADER_SIZE)
            return AVERROR(EIO);

        ff_argo_asf_parse_chunk_header(&brp->basf.ckhdr, buf);

        /*
         * Special Case Hack. It seems that in files where the BASF block isn't first,
         * v1.1 streams are allowed to be non-22050...
         * Bump the version to 1.2 so ff_argo_asf_fill_stream() doesn't "correct" it.
         *
         * Found in Alien Odyssey games files in:
         * ./GRAPHICS/COMMBUNK/{{COMADD1,COMM2_{1,2,3E},COMM3_{2,3,4,5,6}},FADE{1,2}}.BRP
         *
         * Either this format really inconsistent, or FX Fighter and Croc just ignored the
         * sample rate field...
         */
        if (i != 0 && hdr->extradata.basf.version_major == 1 && hdr->extradata.basf.version_minor == 1)
            hdr->extradata.basf.version_minor = 2;

        if ((ret = ff_argo_asf_fill_stream(s, st, &hdr->extradata.basf, &brp->basf.ckhdr)) < 0)
            return ret;

        /* Convert ms to samples. */
        st->start_time = av_rescale_rnd(blk.start_ms, st->codecpar->sample_rate, 1000, AV_ROUND_UP);
        st->duration   = av_rescale_rnd(hdr->duration_ms, st->codecpar->sample_rate, 1000, AV_ROUND_UP);

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

static int argo_brp_read_packet(AVFormatContext *s, AVPacket *pkt)
{
    ArgoBRPDemuxContext *brp = s->priv_data;
    ArgoBRPBlockHeader blk;
    const ArgoBRPStreamHeader *shdr;
    AVStream *st;
    uint8_t buf[BRP_MIN_BUFFER_SIZE];
    ArgoASFChunkHeader ckhdr;
    int ret;

    if ((ret = avio_read(s->pb, buf, BRP_BLOCK_HEADER_SIZE)) < 0)
        return ret;
    else if (ret != BRP_BLOCK_HEADER_SIZE)
        return AVERROR(EIO);

    blk.stream_id = AV_RL32(buf + 0);
    blk.start_ms  = AV_RL32(buf + 4);
    blk.size      = AV_RL32(buf + 8);

    if (blk.stream_id == -1)
        return AVERROR_EOF;

    if (blk.stream_id < -1 || blk.stream_id >= s->nb_streams)
        return AVERROR_INVALIDDATA;

    st = s->streams[blk.stream_id];
    shdr = brp->streams + blk.stream_id;

    if (blk.stream_id == brp->basf.index) {
        if (blk.size < ASF_CHUNK_HEADER_SIZE)
            return AVERROR_INVALIDDATA;

        if ((ret = avio_read(s->pb, buf, ASF_CHUNK_HEADER_SIZE)) < 0)
            return ret;

        ff_argo_asf_parse_chunk_header(&ckhdr, buf);

        /* Ensure the chunk attributes are the same. */
        if (ckhdr.sample_rate != brp->basf.ckhdr.sample_rate ||
            ckhdr.flags       != brp->basf.ckhdr.flags       ||
            ckhdr.unk1        != brp->basf.ckhdr.unk1        ||
            ckhdr.unk2        != brp->basf.ckhdr.unk2)
            return AVERROR_INVALIDDATA;

        blk.size -= ASF_CHUNK_HEADER_SIZE;
    }

    if ((ret = av_get_packet(s->pb, pkt, blk.size)) < 0)
        return ret;
    else if (ret != blk.size)
        return AVERROR_INVALIDDATA;

    if (blk.stream_id == brp->basf.index) {
        pkt->duration = ckhdr.num_samples * ckhdr.num_blocks;
        pkt->pts      = av_rescale_rnd(blk.start_ms, ckhdr.sample_rate, 1000, AV_ROUND_UP);
    } else if (shdr->codec_id == BRP_CODEC_ID_BVID) {
        pkt->duration = av_rescale_rnd(1, st->duration, shdr->extradata.bvid.num_frames, AV_ROUND_UP);
        pkt->pts      = blk.start_ms;
    } else {
        pkt->pts      = blk.start_ms;
    }

    pkt->stream_index = blk.stream_id;
    return 0;
}

const AVInputFormat ff_argo_brp_demuxer = {
    .name           = "argo_brp",
    .long_name      = NULL_IF_CONFIG_SMALL("Argonaut Games BRP"),
    .priv_data_size = sizeof(ArgoBRPDemuxContext),
    .read_probe     = argo_brp_probe,
    .read_header    = argo_brp_read_header,
    .read_packet    = argo_brp_read_packet,
};