aboutsummaryrefslogtreecommitdiffstats
path: root/libavformat/r3d.c
blob: 7f0e8de0e462bdb1497798d579cb822587fbd372 (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
/*
 * R3D REDCODE demuxer
 * Copyright (c) 2008 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>
 *
 * This file is part of Libav.
 *
 * Libav 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.
 *
 * Libav 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 Libav; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

//#define DEBUG

#include "libavutil/intreadwrite.h"
#include "libavutil/dict.h"
#include "libavutil/mathematics.h"
#include "avformat.h"
#include "internal.h"

typedef struct {
    unsigned video_offsets_count;
    unsigned *video_offsets;
    unsigned rdvo_offset;
} R3DContext;

typedef struct {
    unsigned size;
    uint32_t tag;
    uint64_t offset;
} Atom;

static int read_atom(AVFormatContext *s, Atom *atom)
{
    atom->offset = avio_tell(s->pb);
    atom->size = avio_rb32(s->pb);
    if (atom->size < 8)
        return -1;
    atom->tag = avio_rl32(s->pb);
    av_dlog(s, "atom %u %.4s offset %#"PRIx64"\n",
            atom->size, (char*)&atom->tag, atom->offset);
    return atom->size;
}

static int r3d_read_red1(AVFormatContext *s)
{
    AVStream *st = avformat_new_stream(s, NULL);
    char filename[258];
    int tmp;
    int av_unused tmp2;

    if (!st)
        return AVERROR(ENOMEM);
    st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
    st->codec->codec_id = CODEC_ID_JPEG2000;

    tmp  = avio_r8(s->pb); // major version
    tmp2 = avio_r8(s->pb); // minor version
    av_dlog(s, "version %d.%d\n", tmp, tmp2);

    tmp = avio_rb16(s->pb); // unknown
    av_dlog(s, "unknown1 %d\n", tmp);

    tmp = avio_rb32(s->pb);
    avpriv_set_pts_info(st, 32, 1, tmp);

    tmp = avio_rb32(s->pb); // filenum
    av_dlog(s, "filenum %d\n", tmp);

    avio_skip(s->pb, 32); // unknown

    st->codec->width  = avio_rb32(s->pb);
    st->codec->height = avio_rb32(s->pb);

    tmp = avio_rb16(s->pb); // unknown
    av_dlog(s, "unknown2 %d\n", tmp);

    st->codec->time_base.den = avio_rb16(s->pb);
    st->codec->time_base.num = avio_rb16(s->pb);

    tmp = avio_r8(s->pb); // audio channels
    av_dlog(s, "audio channels %d\n", tmp);
    if (tmp > 0) {
        AVStream *ast = avformat_new_stream(s, NULL);
        if (!ast)
            return AVERROR(ENOMEM);
        ast->codec->codec_type = AVMEDIA_TYPE_AUDIO;
        ast->codec->codec_id = CODEC_ID_PCM_S32BE;
        ast->codec->channels = tmp;
        avpriv_set_pts_info(ast, 32, 1, st->time_base.den);
    }

    avio_read(s->pb, filename, 257);
    filename[sizeof(filename)-1] = 0;
    av_dict_set(&st->metadata, "filename", filename, 0);

    av_dlog(s, "filename %s\n", filename);
    av_dlog(s, "resolution %dx%d\n", st->codec->width, st->codec->height);
    av_dlog(s, "timescale %d\n", st->time_base.den);
    av_dlog(s, "frame rate %d/%d\n",
            st->codec->time_base.num, st->codec->time_base.den);

    return 0;
}

static int r3d_read_rdvo(AVFormatContext *s, Atom *atom)
{
    R3DContext *r3d = s->priv_data;
    AVStream *st = s->streams[0];
    int i;

    r3d->video_offsets_count = (atom->size - 8) / 4;
    r3d->video_offsets = av_malloc(atom->size);
    if (!r3d->video_offsets)
        return AVERROR(ENOMEM);

    for (i = 0; i < r3d->video_offsets_count; i++) {
        r3d->video_offsets[i] = avio_rb32(s->pb);
        if (!r3d->video_offsets[i]) {
            r3d->video_offsets_count = i;
            break;
        }
        av_dlog(s, "video offset %d: %#x\n", i, r3d->video_offsets[i]);
    }

    if (st->codec->time_base.den)
        st->duration = (uint64_t)r3d->video_offsets_count*
            st->time_base.den*st->codec->time_base.num/st->codec->time_base.den;
    av_dlog(s, "duration %"PRId64"\n", st->duration);

    return 0;
}

static void r3d_read_reos(AVFormatContext *s)
{
    R3DContext *r3d = s->priv_data;
    int av_unused tmp;

    r3d->rdvo_offset = avio_rb32(s->pb);
    avio_rb32(s->pb); // rdvs offset
    avio_rb32(s->pb); // rdao offset
    avio_rb32(s->pb); // rdas offset

    tmp = avio_rb32(s->pb);
    av_dlog(s, "num video chunks %d\n", tmp);

    tmp = avio_rb32(s->pb);
    av_dlog(s, "num audio chunks %d\n", tmp);

    avio_skip(s->pb, 6*4);
}

static int r3d_read_header(AVFormatContext *s)
{
    R3DContext *r3d = s->priv_data;
    Atom atom;
    int ret;

    if (read_atom(s, &atom) < 0) {
        av_log(s, AV_LOG_ERROR, "error reading atom\n");
        return -1;
    }
    if (atom.tag == MKTAG('R','E','D','1')) {
        if ((ret = r3d_read_red1(s)) < 0) {
            av_log(s, AV_LOG_ERROR, "error parsing 'red1' atom\n");
            return ret;
        }
    } else {
        av_log(s, AV_LOG_ERROR, "could not find 'red1' atom\n");
        return -1;
    }

    s->data_offset = avio_tell(s->pb);
    av_dlog(s, "data offset %#"PRIx64"\n", s->data_offset);
    if (!s->pb->seekable)
        return 0;
    // find REOB/REOF/REOS to load index
    avio_seek(s->pb, avio_size(s->pb)-48-8, SEEK_SET);
    if (read_atom(s, &atom) < 0)
        av_log(s, AV_LOG_ERROR, "error reading end atom\n");

    if (atom.tag != MKTAG('R','E','O','B') &&
        atom.tag != MKTAG('R','E','O','F') &&
        atom.tag != MKTAG('R','E','O','S'))
        goto out;

    r3d_read_reos(s);

    if (r3d->rdvo_offset) {
        avio_seek(s->pb, r3d->rdvo_offset, SEEK_SET);
        if (read_atom(s, &atom) < 0)
            av_log(s, AV_LOG_ERROR, "error reading 'rdvo' atom\n");
        if (atom.tag == MKTAG('R','D','V','O')) {
            if (r3d_read_rdvo(s, &atom) < 0)
                av_log(s, AV_LOG_ERROR, "error parsing 'rdvo' atom\n");
        }
    }

 out:
    avio_seek(s->pb, s->data_offset, SEEK_SET);
    return 0;
}

static int r3d_read_redv(AVFormatContext *s, AVPacket *pkt, Atom *atom)
{
    AVStream *st = s->streams[0];
    int tmp;
    int av_unused tmp2;
    uint64_t pos = avio_tell(s->pb);
    unsigned dts;
    int ret;

    dts = avio_rb32(s->pb);

    tmp = avio_rb32(s->pb);
    av_dlog(s, "frame num %d\n", tmp);

    tmp  = avio_r8(s->pb); // major version
    tmp2 = avio_r8(s->pb); // minor version
    av_dlog(s, "version %d.%d\n", tmp, tmp2);

    tmp = avio_rb16(s->pb); // unknown
    av_dlog(s, "unknown %d\n", tmp);

    if (tmp > 4) {
        tmp = avio_rb16(s->pb); // unknown
        av_dlog(s, "unknown %d\n", tmp);

        tmp = avio_rb16(s->pb); // unknown
        av_dlog(s, "unknown %d\n", tmp);

        tmp = avio_rb32(s->pb);
        av_dlog(s, "width %d\n", tmp);
        tmp = avio_rb32(s->pb);
        av_dlog(s, "height %d\n", tmp);

        tmp = avio_rb32(s->pb);
        av_dlog(s, "metadata len %d\n", tmp);
    }
    tmp = atom->size - 8 - (avio_tell(s->pb) - pos);
    if (tmp < 0)
        return -1;
    ret = av_get_packet(s->pb, pkt, tmp);
    if (ret < 0) {
        av_log(s, AV_LOG_ERROR, "error reading video packet\n");
        return -1;
    }

    pkt->stream_index = 0;
    pkt->dts = dts;
    if (st->codec->time_base.den)
        pkt->duration = (uint64_t)st->time_base.den*
            st->codec->time_base.num/st->codec->time_base.den;
    av_dlog(s, "pkt dts %"PRId64" duration %d\n", pkt->dts, pkt->duration);

    return 0;
}

static int r3d_read_reda(AVFormatContext *s, AVPacket *pkt, Atom *atom)
{
    AVStream *st = s->streams[1];
    int av_unused tmp, tmp2;
    int samples, size;
    uint64_t pos = avio_tell(s->pb);
    unsigned dts;
    int ret;

    dts = avio_rb32(s->pb);

    st->codec->sample_rate = avio_rb32(s->pb);

    samples = avio_rb32(s->pb);

    tmp = avio_rb32(s->pb);
    av_dlog(s, "packet num %d\n", tmp);

    tmp = avio_rb16(s->pb); // unkown
    av_dlog(s, "unknown %d\n", tmp);

    tmp  = avio_r8(s->pb); // major version
    tmp2 = avio_r8(s->pb); // minor version
    av_dlog(s, "version %d.%d\n", tmp, tmp2);

    tmp = avio_rb32(s->pb); // unknown
    av_dlog(s, "unknown %d\n", tmp);

    size = atom->size - 8 - (avio_tell(s->pb) - pos);
    if (size < 0)
        return -1;
    ret = av_get_packet(s->pb, pkt, size);
    if (ret < 0) {
        av_log(s, AV_LOG_ERROR, "error reading audio packet\n");
        return ret;
    }

    pkt->stream_index = 1;
    pkt->dts = dts;
    pkt->duration = av_rescale(samples, st->time_base.den, st->codec->sample_rate);
    av_dlog(s, "pkt dts %"PRId64" duration %d samples %d sample rate %d\n",
            pkt->dts, pkt->duration, samples, st->codec->sample_rate);

    return 0;
}

static int r3d_read_packet(AVFormatContext *s, AVPacket *pkt)
{
    Atom atom;
    int err = 0;

    while (!err) {
        if (read_atom(s, &atom) < 0) {
            err = -1;
            break;
        }
        switch (atom.tag) {
        case MKTAG('R','E','D','V'):
            if (s->streams[0]->discard == AVDISCARD_ALL)
                goto skip;
            if (!(err = r3d_read_redv(s, pkt, &atom)))
                return 0;
            break;
        case MKTAG('R','E','D','A'):
            if (s->nb_streams < 2)
                return -1;
            if (s->streams[1]->discard == AVDISCARD_ALL)
                goto skip;
            if (!(err = r3d_read_reda(s, pkt, &atom)))
                return 0;
            break;
        default:
        skip:
            avio_skip(s->pb, atom.size-8);
        }
    }
    return err;
}

static int r3d_probe(AVProbeData *p)
{
    if (AV_RL32(p->buf + 4) == MKTAG('R','E','D','1'))
        return AVPROBE_SCORE_MAX;
    return 0;
}

static int r3d_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
{
    AVStream *st = s->streams[0]; // video stream
    R3DContext *r3d = s->priv_data;
    int frame_num;

    if (!st->codec->time_base.num || !st->time_base.den)
        return -1;

    frame_num = sample_time*st->codec->time_base.den/
        ((int64_t)st->codec->time_base.num*st->time_base.den);
    av_dlog(s, "seek frame num %d timestamp %"PRId64"\n",
            frame_num, sample_time);

    if (frame_num < r3d->video_offsets_count) {
        avio_seek(s->pb, r3d->video_offsets_count, SEEK_SET);
    } else {
        av_log(s, AV_LOG_ERROR, "could not seek to frame %d\n", frame_num);
        return -1;
    }

    return 0;
}

static int r3d_close(AVFormatContext *s)
{
    R3DContext *r3d = s->priv_data;

    av_freep(&r3d->video_offsets);

    return 0;
}

AVInputFormat ff_r3d_demuxer = {
    .name           = "r3d",
    .long_name      = NULL_IF_CONFIG_SMALL("REDCODE R3D format"),
    .priv_data_size = sizeof(R3DContext),
    .read_probe     = r3d_probe,
    .read_header    = r3d_read_header,
    .read_packet    = r3d_read_packet,
    .read_close     = r3d_close,
    .read_seek      = r3d_seek,
};