aboutsummaryrefslogtreecommitdiffstats
path: root/libavformat/electronicarts.c
blob: 0201e82004650cdb6efef7b8acc93e3ae6fea4a1 (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
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
/* Electronic Arts Multimedia File Demuxer
 * Copyright (c) 2004  The ffmpeg Project
 *
 * 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
 */

/**
 * @file electronicarts.c
 * Electronic Arts Multimedia file demuxer (WVE/UV2/etc.)
 * by Robin Kay (komadori at gekkou.co.uk)
 */

#include "avformat.h"

#define SCHl_TAG MKTAG('S', 'C', 'H', 'l')
#define SEAD_TAG MKTAG('S', 'E', 'A', 'D')    /* Sxxx header */
#define SNDC_TAG MKTAG('S', 'N', 'D', 'C')    /* Sxxx data */
#define SEND_TAG MKTAG('S', 'E', 'N', 'D')    /* Sxxx end */
#define ISNh_TAG MKTAG('1', 'S', 'N', 'h')    /* 1SNx header */
#define EACS_TAG MKTAG('E', 'A', 'C', 'S')
#define ISNd_TAG MKTAG('1', 'S', 'N', 'd')    /* 1SNx data */
#define ISNe_TAG MKTAG('1', 'S', 'N', 'e')    /* 1SNx end */
#define PT00_TAG MKTAG('P', 'T', 0x0, 0x0)
#define GSTR_TAG MKTAG('G', 'S', 'T', 'R')
#define SCDl_TAG MKTAG('S', 'C', 'D', 'l')
#define SCEl_TAG MKTAG('S', 'C', 'E', 'l')
#define kVGT_TAG MKTAG('k', 'V', 'G', 'T')    /* TGV i-frame */
#define MADk_TAG MKTAG('M', 'A', 'D', 'k')    /* MAD i-frame */
#define MPCh_TAG MKTAG('M', 'P', 'C', 'h')    /* MPEG2 */
#define MVhd_TAG MKTAG('M', 'V', 'h', 'd')
#define MV0K_TAG MKTAG('M', 'V', '0', 'K')
#define MV0F_TAG MKTAG('M', 'V', '0', 'F')
#define MVIh_TAG MKTAG('M', 'V', 'I', 'h')    /* CMV header */

typedef struct EaDemuxContext {
    int big_endian;

    int video_codec;
    AVRational time_base;
    int video_stream_index;

    int audio_codec;
    int audio_stream_index;
    int audio_frame_counter;

    int64_t audio_pts;

    int bytes;
    int sample_rate;
    int num_channels;
    int num_samples;
} EaDemuxContext;

static uint32_t read_arbitary(ByteIOContext *pb) {
    uint8_t size, byte;
    int i;
    uint32_t word;

    size = get_byte(pb);

    word = 0;
    for (i = 0; i < size; i++) {
        byte = get_byte(pb);
        word <<= 8;
        word |= byte;
    }

    return word;
}

/*
 * Process PT/GSTR sound header
 * return 1 if success, 0 if invalid format, otherwise AVERROR_xxx
 */
static int process_audio_header_elements(AVFormatContext *s)
{
    int inHeader = 1;
    EaDemuxContext *ea = s->priv_data;
    ByteIOContext *pb = s->pb;
    int compression_type = -1, revision = -1, revision2 = -1;

    ea->bytes = 2;
    ea->sample_rate = -1;
    ea->num_channels = 1;

    while (inHeader) {
        int inSubheader;
        uint8_t byte;
        byte = get_byte(pb);

        switch (byte) {
        case 0xFD:
            av_log (s, AV_LOG_INFO, "entered audio subheader\n");
            inSubheader = 1;
            while (inSubheader) {
                uint8_t subbyte;
                subbyte = get_byte(pb);

                switch (subbyte) {
                case 0x80:
                    revision = read_arbitary(pb);
                    av_log (s, AV_LOG_INFO, "revision (element 0x80) set to 0x%08x\n", revision);
                    break;
                case 0x82:
                    ea->num_channels = read_arbitary(pb);
                    av_log (s, AV_LOG_INFO, "num_channels (element 0x82) set to 0x%08x\n", ea->num_channels);
                    break;
                case 0x83:
                    compression_type = read_arbitary(pb);
                    av_log (s, AV_LOG_INFO, "compression_type (element 0x83) set to 0x%08x\n", compression_type);
                    break;
                case 0x84:
                    ea->sample_rate = read_arbitary(pb);
                    av_log (s, AV_LOG_INFO, "sample_rate (element 0x84) set to %i\n", ea->sample_rate);
                    break;
                case 0x85:
                    ea->num_samples = read_arbitary(pb);
                    av_log (s, AV_LOG_INFO, "num_samples (element 0x85) set to 0x%08x\n", ea->num_samples);
                    break;
                case 0x8A:
                    av_log (s, AV_LOG_INFO, "element 0x%02x set to 0x%08x\n", subbyte, read_arbitary(pb));
                    av_log (s, AV_LOG_INFO, "exited audio subheader\n");
                    inSubheader = 0;
                    break;
                case 0xA0:
                    revision2 = read_arbitary(pb);
                    av_log (s, AV_LOG_INFO, "revision2 (element 0xA0) set to 0x%08x\n", revision2);
                    break;
                case 0xFF:
                    av_log (s, AV_LOG_INFO, "end of header block reached (within audio subheader)\n");
                    inSubheader = 0;
                    inHeader = 0;
                    break;
                default:
                    av_log (s, AV_LOG_INFO, "element 0x%02x set to 0x%08x\n", subbyte, read_arbitary(pb));
                    break;
                }
            }
            break;
        case 0xFF:
            av_log (s, AV_LOG_INFO, "end of header block reached\n");
            inHeader = 0;
            break;
        default:
            av_log (s, AV_LOG_INFO, "header element 0x%02x set to 0x%08x\n", byte, read_arbitary(pb));
            break;
        }
    }

    switch (compression_type) {
    case  0: ea->audio_codec = CODEC_ID_PCM_S16LE; break;
    case  7: ea->audio_codec = CODEC_ID_ADPCM_EA; break;
    case -1:
        switch (revision) {
        case  1: ea->audio_codec = CODEC_ID_ADPCM_EA_R1; break;
        case  2: ea->audio_codec = CODEC_ID_ADPCM_EA_R2; break;
        case  3: ea->audio_codec = CODEC_ID_ADPCM_EA_R3; break;
        case -1: break;
        default:
            av_log(s, AV_LOG_ERROR, "unsupported stream type; revision=%i\n", revision);
            return 0;
        }
        switch (revision2) {
        case  8: ea->audio_codec = CODEC_ID_PCM_S16LE_PLANAR; break;
        default:
            av_log(s, AV_LOG_ERROR, "unsupported stream type; revision2=%i\n", revision2);
            return 0;
        }
        break;
    default:
        av_log(s, AV_LOG_ERROR, "unsupported stream type; compression_type=%i\n", compression_type);
        return 0;
    }

    if (ea->sample_rate == -1)
        ea->sample_rate = revision==3 ? 48000 : 22050;

    return 1;
}

/*
 * Process EACS sound header
 * return 1 if success, 0 if invalid format, otherwise AVERROR_xxx
 */
static int process_audio_header_eacs(AVFormatContext *s)
{
    EaDemuxContext *ea = s->priv_data;
    ByteIOContext *pb = s->pb;
    int compression_type;

    ea->sample_rate  = ea->big_endian ? get_be32(pb) : get_le32(pb);
    ea->bytes        = get_byte(pb);   /* 1=8-bit, 2=16-bit */
    ea->num_channels = get_byte(pb);
    compression_type = get_byte(pb);
    url_fskip(pb, 13);

    switch (compression_type) {
    case 0:
        switch (ea->bytes) {
        case 1: ea->audio_codec = CODEC_ID_PCM_S8;    break;
        case 2: ea->audio_codec = CODEC_ID_PCM_S16LE; break;
        }
        break;
    case 1: ea->audio_codec = CODEC_ID_PCM_MULAW; ea->bytes = 1; break;
    case 2: ea->audio_codec = CODEC_ID_ADPCM_IMA_EA_EACS; break;
    default:
        av_log (s, AV_LOG_ERROR, "unsupported stream type; audio compression_type=%i\n", compression_type);
    }

    return 1;
}

/*
 * Process SEAD sound header
 * return 1 if success, 0 if invalid format, otherwise AVERROR_xxx
 */
static int process_audio_header_sead(AVFormatContext *s)
{
    EaDemuxContext *ea = s->priv_data;
    ByteIOContext *pb = s->pb;

    ea->sample_rate  = get_le32(pb);
    ea->bytes        = get_le32(pb);  /* 1=8-bit, 2=16-bit */
    ea->num_channels = get_le32(pb);
    ea->audio_codec  = CODEC_ID_ADPCM_IMA_EA_SEAD;

    return 1;
}

static int process_video_header_vp6(AVFormatContext *s)
{
    EaDemuxContext *ea = s->priv_data;
    ByteIOContext *pb = s->pb;

    url_fskip(pb, 16);
    ea->time_base.den = get_le32(pb);
    ea->time_base.num = get_le32(pb);
    ea->video_codec = CODEC_ID_VP6;

    return 1;
}

/*
 * Process EA file header
 * Returns 1 if the EA file is valid and successfully opened, 0 otherwise
 */
static int process_ea_header(AVFormatContext *s) {
    uint32_t blockid, size = 0;
    EaDemuxContext *ea = s->priv_data;
    ByteIOContext *pb = s->pb;
    int i;

    for (i=0; i<5 && (!ea->audio_codec || !ea->video_codec); i++) {
        unsigned int startpos = url_ftell(pb);
        int err = 0;

        blockid = get_le32(pb);
        size = get_le32(pb);
        if (i == 0)
            ea->big_endian = size > 0x000FFFFF;
        if (ea->big_endian)
            size = bswap_32(size);

        switch (blockid) {
            case ISNh_TAG:
                if (get_le32(pb) != EACS_TAG) {
                    av_log (s, AV_LOG_ERROR, "unknown 1SNh headerid\n");
                    return 0;
                }
                err = process_audio_header_eacs(s);
                break;

            case SCHl_TAG :
                blockid = get_le32(pb);
                if (blockid == GSTR_TAG) {
                    url_fskip(pb, 4);
                } else if (blockid != PT00_TAG) {
                    av_log (s, AV_LOG_ERROR, "unknown SCHl headerid\n");
                    return 0;
                }
                err = process_audio_header_elements(s);
                break;

            case SEAD_TAG:
                err = process_audio_header_sead(s);
                break;

            case MVhd_TAG :
                err = process_video_header_vp6(s);
                break;
        }

        if (err < 0) {
            av_log(s, AV_LOG_ERROR, "error parsing header: %i\n", err);
            return err;
        }

        url_fseek(pb, startpos + size, SEEK_SET);
    }

    url_fseek(pb, 0, SEEK_SET);

    return 1;
}


static int ea_probe(AVProbeData *p)
{
    switch (AV_RL32(&p->buf[0])) {
    case ISNh_TAG:
    case SCHl_TAG:
    case SEAD_TAG:
    case kVGT_TAG:
    case MADk_TAG:
    case MPCh_TAG:
    case MVhd_TAG:
    case MVIh_TAG:
        return AVPROBE_SCORE_MAX;
    }
    return 0;
}

static int ea_read_header(AVFormatContext *s,
                          AVFormatParameters *ap)
{
    EaDemuxContext *ea = s->priv_data;
    AVStream *st;

    if (!process_ea_header(s))
        return AVERROR(EIO);

    if (ea->video_codec) {
        /* initialize the video decoder stream */
        st = av_new_stream(s, 0);
        if (!st)
            return AVERROR(ENOMEM);
        ea->video_stream_index = st->index;
        st->codec->codec_type = CODEC_TYPE_VIDEO;
        st->codec->codec_id = ea->video_codec;
        st->codec->codec_tag = 0;  /* no fourcc */
        st->codec->time_base = ea->time_base;
    }

    if (ea->audio_codec) {
        /* initialize the audio decoder stream */
        st = av_new_stream(s, 0);
        if (!st)
            return AVERROR(ENOMEM);
        av_set_pts_info(st, 33, 1, ea->sample_rate);
        st->codec->codec_type = CODEC_TYPE_AUDIO;
        st->codec->codec_id = ea->audio_codec;
        st->codec->codec_tag = 0;  /* no tag */
        st->codec->channels = ea->num_channels;
        st->codec->sample_rate = ea->sample_rate;
        st->codec->bits_per_sample = ea->bytes * 8;
        st->codec->bit_rate = st->codec->channels * st->codec->sample_rate *
            st->codec->bits_per_sample / 4;
        st->codec->block_align = st->codec->channels*st->codec->bits_per_sample;
        ea->audio_stream_index = st->index;
        ea->audio_frame_counter = 0;
    }

    return 1;
}

static int ea_read_packet(AVFormatContext *s,
                          AVPacket *pkt)
{
    EaDemuxContext *ea = s->priv_data;
    ByteIOContext *pb = s->pb;
    int ret = 0;
    int packet_read = 0;
    unsigned int chunk_type, chunk_size;
    int key = 0;

    while (!packet_read) {
        chunk_type = get_le32(pb);
        chunk_size = (ea->big_endian ? get_be32(pb) : get_le32(pb)) - 8;

        switch (chunk_type) {
        /* audio data */
        case ISNh_TAG:
            /* header chunk also contains data; skip over the header portion*/
            url_fskip(pb, 32);
            chunk_size -= 32;
        case ISNd_TAG:
        case SCDl_TAG:
        case SNDC_TAG:
            if (!ea->audio_codec) {
                url_fskip(pb, chunk_size);
                break;
            } else if (ea->audio_codec == CODEC_ID_PCM_S16LE_PLANAR) {
                url_fskip(pb, 12);  /* planar header */
                chunk_size -= 12;
            }
            ret = av_get_packet(pb, pkt, chunk_size);
            if (ret != chunk_size)
                ret = AVERROR(EIO);
            else {
                    pkt->stream_index = ea->audio_stream_index;
                    pkt->pts = 90000;
                    pkt->pts *= ea->audio_frame_counter;
                    pkt->pts /= ea->sample_rate;

                    switch (ea->audio_codec) {
                    case CODEC_ID_ADPCM_EA:
                    /* 2 samples/byte, 1 or 2 samples per frame depending
                     * on stereo; chunk also has 12-byte header */
                    ea->audio_frame_counter += ((chunk_size - 12) * 2) /
                        ea->num_channels;
                        break;
                    default:
                        ea->audio_frame_counter += chunk_size /
                            (ea->bytes * ea->num_channels);
                    }
            }

            packet_read = 1;
            break;

        /* ending tag */
        case 0:
        case ISNe_TAG:
        case SCEl_TAG:
        case SEND_TAG:
            ret = AVERROR(EIO);
            packet_read = 1;
            break;

        case MV0K_TAG:
            key = PKT_FLAG_KEY;
        case MV0F_TAG:
            ret = av_get_packet(pb, pkt, chunk_size);
            if (ret != chunk_size)
                ret = AVERROR_IO;
            else {
                pkt->stream_index = ea->video_stream_index;
                pkt->flags |= key;
            }
            packet_read = 1;
            break;

        default:
            url_fseek(pb, chunk_size, SEEK_CUR);
            break;
        }
    }

    return ret;
}

AVInputFormat ea_demuxer = {
    "ea",
    "Electronic Arts Multimedia Format",
    sizeof(EaDemuxContext),
    ea_probe,
    ea_read_header,
    ea_read_packet,
};