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1
/* Electronic Arts Multimedia File Demuxer
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 * Copyright (c) 2004  The ffmpeg Project
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 * Copyright (c) 2006-2008 Peter Ross
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 *
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
8
 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
21

    
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/**
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 * @file electronicarts.c
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 * Electronic Arts Multimedia file demuxer (WVE/UV2/etc.)
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 * by Robin Kay (komadori at gekkou.co.uk)
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 */
27

    
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#include "avformat.h"
29

    
30
#define SCHl_TAG MKTAG('S', 'C', 'H', 'l')
31
#define SEAD_TAG MKTAG('S', 'E', 'A', 'D')    /* Sxxx header */
32
#define SNDC_TAG MKTAG('S', 'N', 'D', 'C')    /* Sxxx data */
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#define SEND_TAG MKTAG('S', 'E', 'N', 'D')    /* Sxxx end */
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#define ISNh_TAG MKTAG('1', 'S', 'N', 'h')    /* 1SNx header */
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#define EACS_TAG MKTAG('E', 'A', 'C', 'S')
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#define ISNd_TAG MKTAG('1', 'S', 'N', 'd')    /* 1SNx data */
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#define ISNe_TAG MKTAG('1', 'S', 'N', 'e')    /* 1SNx end */
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#define PT00_TAG MKTAG('P', 'T', 0x0, 0x0)
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#define GSTR_TAG MKTAG('G', 'S', 'T', 'R')
40
#define SCDl_TAG MKTAG('S', 'C', 'D', 'l')
41
#define SCEl_TAG MKTAG('S', 'C', 'E', 'l')
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#define kVGT_TAG MKTAG('k', 'V', 'G', 'T')    /* TGV i-frame */
43
#define MADk_TAG MKTAG('M', 'A', 'D', 'k')    /* MAD i-frame */
44
#define MPCh_TAG MKTAG('M', 'P', 'C', 'h')    /* MPEG2 */
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#define MVhd_TAG MKTAG('M', 'V', 'h', 'd')
46
#define MV0K_TAG MKTAG('M', 'V', '0', 'K')
47
#define MV0F_TAG MKTAG('M', 'V', '0', 'F')
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#define MVIh_TAG MKTAG('M', 'V', 'I', 'h')    /* CMV header */
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#define MVIf_TAG MKTAG('M', 'V', 'I', 'f')    /* CMV i-frame */
50

    
51
typedef struct EaDemuxContext {
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    int big_endian;
53

    
54
    enum CodecID video_codec;
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    AVRational time_base;
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    int video_stream_index;
57

    
58
    enum CodecID audio_codec;
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    int audio_stream_index;
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    int audio_frame_counter;
61

    
62
    int64_t audio_pts;
63

    
64
    int bytes;
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    int sample_rate;
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    int num_channels;
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    int num_samples;
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} EaDemuxContext;
69

    
70
static uint32_t read_arbitary(ByteIOContext *pb) {
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    uint8_t size, byte;
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    int i;
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    uint32_t word;
74

    
75
    size = get_byte(pb);
76

    
77
    word = 0;
78
    for (i = 0; i < size; i++) {
79
        byte = get_byte(pb);
80
        word <<= 8;
81
        word |= byte;
82
    }
83

    
84
    return word;
85
}
86

    
87
/*
88
 * Process PT/GSTR sound header
89
 * return 1 if success, 0 if invalid format, otherwise AVERROR_xxx
90
 */
91
static int process_audio_header_elements(AVFormatContext *s)
92
{
93
    int inHeader = 1;
94
    EaDemuxContext *ea = s->priv_data;
95
    ByteIOContext *pb = s->pb;
96
    int compression_type = -1, revision = -1, revision2 = -1;
97

    
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    ea->bytes = 2;
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    ea->sample_rate = -1;
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    ea->num_channels = 1;
101

    
102
    while (inHeader) {
103
        int inSubheader;
104
        uint8_t byte;
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        byte = get_byte(pb);
106

    
107
        switch (byte) {
108
        case 0xFD:
109
            av_log (s, AV_LOG_INFO, "entered audio subheader\n");
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            inSubheader = 1;
111
            while (inSubheader) {
112
                uint8_t subbyte;
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                subbyte = get_byte(pb);
114

    
115
                switch (subbyte) {
116
                case 0x80:
117
                    revision = read_arbitary(pb);
118
                    av_log (s, AV_LOG_INFO, "revision (element 0x80) set to 0x%08x\n", revision);
119
                    break;
120
                case 0x82:
121
                    ea->num_channels = read_arbitary(pb);
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                    av_log (s, AV_LOG_INFO, "num_channels (element 0x82) set to 0x%08x\n", ea->num_channels);
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                    break;
124
                case 0x83:
125
                    compression_type = read_arbitary(pb);
126
                    av_log (s, AV_LOG_INFO, "compression_type (element 0x83) set to 0x%08x\n", compression_type);
127
                    break;
128
                case 0x84:
129
                    ea->sample_rate = read_arbitary(pb);
130
                    av_log (s, AV_LOG_INFO, "sample_rate (element 0x84) set to %i\n", ea->sample_rate);
131
                    break;
132
                case 0x85:
133
                    ea->num_samples = read_arbitary(pb);
134
                    av_log (s, AV_LOG_INFO, "num_samples (element 0x85) set to 0x%08x\n", ea->num_samples);
135
                    break;
136
                case 0x8A:
137
                    av_log (s, AV_LOG_INFO, "element 0x%02x set to 0x%08x\n", subbyte, read_arbitary(pb));
138
                    av_log (s, AV_LOG_INFO, "exited audio subheader\n");
139
                    inSubheader = 0;
140
                    break;
141
                case 0xA0:
142
                    revision2 = read_arbitary(pb);
143
                    av_log (s, AV_LOG_INFO, "revision2 (element 0xA0) set to 0x%08x\n", revision2);
144
                    break;
145
                case 0xFF:
146
                    av_log (s, AV_LOG_INFO, "end of header block reached (within audio subheader)\n");
147
                    inSubheader = 0;
148
                    inHeader = 0;
149
                    break;
150
                default:
151
                    av_log (s, AV_LOG_INFO, "element 0x%02x set to 0x%08x\n", subbyte, read_arbitary(pb));
152
                    break;
153
                }
154
            }
155
            break;
156
        case 0xFF:
157
            av_log (s, AV_LOG_INFO, "end of header block reached\n");
158
            inHeader = 0;
159
            break;
160
        default:
161
            av_log (s, AV_LOG_INFO, "header element 0x%02x set to 0x%08x\n", byte, read_arbitary(pb));
162
            break;
163
        }
164
    }
165

    
166
    switch (compression_type) {
167
    case  0: ea->audio_codec = CODEC_ID_PCM_S16LE; break;
168
    case  7: ea->audio_codec = CODEC_ID_ADPCM_EA; break;
169
    case -1:
170
        switch (revision) {
171
        case  1: ea->audio_codec = CODEC_ID_ADPCM_EA_R1; break;
172
        case  2: ea->audio_codec = CODEC_ID_ADPCM_EA_R2; break;
173
        case  3: ea->audio_codec = CODEC_ID_ADPCM_EA_R3; break;
174
        case -1: break;
175
        default:
176
            av_log(s, AV_LOG_ERROR, "unsupported stream type; revision=%i\n", revision);
177
            return 0;
178
        }
179
        switch (revision2) {
180
        case  8: ea->audio_codec = CODEC_ID_PCM_S16LE_PLANAR; break;
181
        case -1: break;
182
        default:
183
            av_log(s, AV_LOG_ERROR, "unsupported stream type; revision2=%i\n", revision2);
184
            return 0;
185
        }
186
        break;
187
    default:
188
        av_log(s, AV_LOG_ERROR, "unsupported stream type; compression_type=%i\n", compression_type);
189
        return 0;
190
    }
191

    
192
    if (ea->sample_rate == -1)
193
        ea->sample_rate = revision==3 ? 48000 : 22050;
194

    
195
    return 1;
196
}
197

    
198
/*
199
 * Process EACS sound header
200
 * return 1 if success, 0 if invalid format, otherwise AVERROR_xxx
201
 */
202
static int process_audio_header_eacs(AVFormatContext *s)
203
{
204
    EaDemuxContext *ea = s->priv_data;
205
    ByteIOContext *pb = s->pb;
206
    int compression_type;
207

    
208
    ea->sample_rate  = ea->big_endian ? get_be32(pb) : get_le32(pb);
209
    ea->bytes        = get_byte(pb);   /* 1=8-bit, 2=16-bit */
210
    ea->num_channels = get_byte(pb);
211
    compression_type = get_byte(pb);
212
    url_fskip(pb, 13);
213

    
214
    switch (compression_type) {
215
    case 0:
216
        switch (ea->bytes) {
217
        case 1: ea->audio_codec = CODEC_ID_PCM_S8;    break;
218
        case 2: ea->audio_codec = CODEC_ID_PCM_S16LE; break;
219
        }
220
        break;
221
    case 1: ea->audio_codec = CODEC_ID_PCM_MULAW; ea->bytes = 1; break;
222
    case 2: ea->audio_codec = CODEC_ID_ADPCM_IMA_EA_EACS; break;
223
    default:
224
        av_log (s, AV_LOG_ERROR, "unsupported stream type; audio compression_type=%i\n", compression_type);
225
    }
226

    
227
    return 1;
228
}
229

    
230
/*
231
 * Process SEAD sound header
232
 * return 1 if success, 0 if invalid format, otherwise AVERROR_xxx
233
 */
234
static int process_audio_header_sead(AVFormatContext *s)
235
{
236
    EaDemuxContext *ea = s->priv_data;
237
    ByteIOContext *pb = s->pb;
238

    
239
    ea->sample_rate  = get_le32(pb);
240
    ea->bytes        = get_le32(pb);  /* 1=8-bit, 2=16-bit */
241
    ea->num_channels = get_le32(pb);
242
    ea->audio_codec  = CODEC_ID_ADPCM_IMA_EA_SEAD;
243

    
244
    return 1;
245
}
246

    
247
static int process_video_header_vp6(AVFormatContext *s)
248
{
249
    EaDemuxContext *ea = s->priv_data;
250
    ByteIOContext *pb = s->pb;
251

    
252
    url_fskip(pb, 16);
253
    ea->time_base.den = get_le32(pb);
254
    ea->time_base.num = get_le32(pb);
255
    ea->video_codec = CODEC_ID_VP6;
256

    
257
    return 1;
258
}
259

    
260
/*
261
 * Process EA file header
262
 * Returns 1 if the EA file is valid and successfully opened, 0 otherwise
263
 */
264
static int process_ea_header(AVFormatContext *s) {
265
    uint32_t blockid, size = 0;
266
    EaDemuxContext *ea = s->priv_data;
267
    ByteIOContext *pb = s->pb;
268
    int i;
269

    
270
    for (i=0; i<5 && (!ea->audio_codec || !ea->video_codec); i++) {
271
        unsigned int startpos = url_ftell(pb);
272
        int err = 0;
273

    
274
        blockid = get_le32(pb);
275
        size = get_le32(pb);
276
        if (i == 0)
277
            ea->big_endian = size > 0x000FFFFF;
278
        if (ea->big_endian)
279
            size = bswap_32(size);
280

    
281
        switch (blockid) {
282
            case ISNh_TAG:
283
                if (get_le32(pb) != EACS_TAG) {
284
                    av_log (s, AV_LOG_ERROR, "unknown 1SNh headerid\n");
285
                    return 0;
286
                }
287
                err = process_audio_header_eacs(s);
288
                break;
289

    
290
            case SCHl_TAG :
291
                blockid = get_le32(pb);
292
                if (blockid == GSTR_TAG) {
293
                    url_fskip(pb, 4);
294
                } else if (blockid != PT00_TAG) {
295
                    av_log (s, AV_LOG_ERROR, "unknown SCHl headerid\n");
296
                    return 0;
297
                }
298
                err = process_audio_header_elements(s);
299
                break;
300

    
301
            case SEAD_TAG:
302
                err = process_audio_header_sead(s);
303
                break;
304

    
305
            case MVIh_TAG :
306
                ea->video_codec = CODEC_ID_CMV;
307
                ea->time_base = (AVRational){0,0};
308
                break;
309

    
310
            case MVhd_TAG :
311
                err = process_video_header_vp6(s);
312
                break;
313
        }
314

    
315
        if (err < 0) {
316
            av_log(s, AV_LOG_ERROR, "error parsing header: %i\n", err);
317
            return err;
318
        }
319

    
320
        url_fseek(pb, startpos + size, SEEK_SET);
321
    }
322

    
323
    url_fseek(pb, 0, SEEK_SET);
324

    
325
    return 1;
326
}
327

    
328

    
329
static int ea_probe(AVProbeData *p)
330
{
331
    switch (AV_RL32(&p->buf[0])) {
332
    case ISNh_TAG:
333
    case SCHl_TAG:
334
    case SEAD_TAG:
335
    case kVGT_TAG:
336
    case MADk_TAG:
337
    case MPCh_TAG:
338
    case MVhd_TAG:
339
    case MVIh_TAG:
340
        return AVPROBE_SCORE_MAX;
341
    }
342
    return 0;
343
}
344

    
345
static int ea_read_header(AVFormatContext *s,
346
                          AVFormatParameters *ap)
347
{
348
    EaDemuxContext *ea = s->priv_data;
349
    AVStream *st;
350

    
351
    if (!process_ea_header(s))
352
        return AVERROR(EIO);
353

    
354
    if (ea->video_codec) {
355
        /* initialize the video decoder stream */
356
        st = av_new_stream(s, 0);
357
        if (!st)
358
            return AVERROR(ENOMEM);
359
        ea->video_stream_index = st->index;
360
        st->codec->codec_type = CODEC_TYPE_VIDEO;
361
        st->codec->codec_id = ea->video_codec;
362
        st->codec->codec_tag = 0;  /* no fourcc */
363
        st->codec->time_base = ea->time_base;
364
    }
365

    
366
    if (ea->audio_codec) {
367
        /* initialize the audio decoder stream */
368
        st = av_new_stream(s, 0);
369
        if (!st)
370
            return AVERROR(ENOMEM);
371
        av_set_pts_info(st, 33, 1, ea->sample_rate);
372
        st->codec->codec_type = CODEC_TYPE_AUDIO;
373
        st->codec->codec_id = ea->audio_codec;
374
        st->codec->codec_tag = 0;  /* no tag */
375
        st->codec->channels = ea->num_channels;
376
        st->codec->sample_rate = ea->sample_rate;
377
        st->codec->bits_per_sample = ea->bytes * 8;
378
        st->codec->bit_rate = st->codec->channels * st->codec->sample_rate *
379
            st->codec->bits_per_sample / 4;
380
        st->codec->block_align = st->codec->channels*st->codec->bits_per_sample;
381
        ea->audio_stream_index = st->index;
382
        ea->audio_frame_counter = 0;
383
    }
384

    
385
    return 1;
386
}
387

    
388
static int ea_read_packet(AVFormatContext *s,
389
                          AVPacket *pkt)
390
{
391
    EaDemuxContext *ea = s->priv_data;
392
    ByteIOContext *pb = s->pb;
393
    int ret = 0;
394
    int packet_read = 0;
395
    unsigned int chunk_type, chunk_size;
396
    int key = 0;
397

    
398
    while (!packet_read) {
399
        chunk_type = get_le32(pb);
400
        chunk_size = (ea->big_endian ? get_be32(pb) : get_le32(pb)) - 8;
401

    
402
        switch (chunk_type) {
403
        /* audio data */
404
        case ISNh_TAG:
405
            /* header chunk also contains data; skip over the header portion*/
406
            url_fskip(pb, 32);
407
            chunk_size -= 32;
408
        case ISNd_TAG:
409
        case SCDl_TAG:
410
        case SNDC_TAG:
411
            if (!ea->audio_codec) {
412
                url_fskip(pb, chunk_size);
413
                break;
414
            } else if (ea->audio_codec == CODEC_ID_PCM_S16LE_PLANAR) {
415
                url_fskip(pb, 12);  /* planar header */
416
                chunk_size -= 12;
417
            }
418
            ret = av_get_packet(pb, pkt, chunk_size);
419
            if (ret != chunk_size)
420
                ret = AVERROR(EIO);
421
            else {
422
                    pkt->stream_index = ea->audio_stream_index;
423
                    pkt->pts = 90000;
424
                    pkt->pts *= ea->audio_frame_counter;
425
                    pkt->pts /= ea->sample_rate;
426

    
427
                    switch (ea->audio_codec) {
428
                    case CODEC_ID_ADPCM_EA:
429
                    /* 2 samples/byte, 1 or 2 samples per frame depending
430
                     * on stereo; chunk also has 12-byte header */
431
                    ea->audio_frame_counter += ((chunk_size - 12) * 2) /
432
                        ea->num_channels;
433
                        break;
434
                    default:
435
                        ea->audio_frame_counter += chunk_size /
436
                            (ea->bytes * ea->num_channels);
437
                    }
438
            }
439

    
440
            packet_read = 1;
441
            break;
442

    
443
        /* ending tag */
444
        case 0:
445
        case ISNe_TAG:
446
        case SCEl_TAG:
447
        case SEND_TAG:
448
            ret = AVERROR(EIO);
449
            packet_read = 1;
450
            break;
451

    
452
        case MVIh_TAG:
453
            key = PKT_FLAG_KEY;
454
        case MVIf_TAG:
455
            url_fseek(pb, -8, SEEK_CUR);     // include chunk preamble
456
            chunk_size += 8;
457
            goto get_video_packet;
458

    
459
        case MV0K_TAG:
460
            key = PKT_FLAG_KEY;
461
        case MV0F_TAG:
462
get_video_packet:
463
            ret = av_get_packet(pb, pkt, chunk_size);
464
            if (ret != chunk_size)
465
                ret = AVERROR_IO;
466
            else {
467
                pkt->stream_index = ea->video_stream_index;
468
                pkt->flags |= key;
469
            }
470
            packet_read = 1;
471
            break;
472

    
473
        default:
474
            url_fseek(pb, chunk_size, SEEK_CUR);
475
            break;
476
        }
477
    }
478

    
479
    return ret;
480
}
481

    
482
AVInputFormat ea_demuxer = {
483
    "ea",
484
    NULL_IF_CONFIG_SMALL("Electronic Arts Multimedia Format"),
485
    sizeof(EaDemuxContext),
486
    ea_probe,
487
    ea_read_header,
488
    ea_read_packet,
489
};