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ffmpeg / libavformat / mov.c @ c3024f9e

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1
/*
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 * MOV demuxer
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 * Copyright (c) 2001 Fabrice Bellard
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 * Copyright (c) 2009 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>
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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
9
 * 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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 */
22

    
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#include <limits.h>
24

    
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//#define DEBUG
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//#define DEBUG_METADATA
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//#define MOV_EXPORT_ALL_METADATA
28

    
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#include "libavutil/intreadwrite.h"
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#include "libavutil/avstring.h"
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#include "avformat.h"
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#include "riff.h"
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#include "isom.h"
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#include "libavcodec/get_bits.h"
35

    
36
#if CONFIG_ZLIB
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#include <zlib.h>
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#endif
39

    
40
/*
41
 * First version by Francois Revol revol@free.fr
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 * Seek function by Gael Chardon gael.dev@4now.net
43
 *
44
 * Features and limitations:
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 * - reads most of the QT files I have (at least the structure),
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 *   Sample QuickTime files with mp3 audio can be found at: http://www.3ivx.com/showcase.html
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 * - the code is quite ugly... maybe I won't do it recursive next time :-)
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 *
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 * Funny I didn't know about http://sourceforge.net/projects/qt-ffmpeg/
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 * when coding this :) (it's a writer anyway)
51
 *
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 * Reference documents:
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 * http://www.geocities.com/xhelmboyx/quicktime/formats/qtm-layout.txt
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 * Apple:
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 *  http://developer.apple.com/documentation/QuickTime/QTFF/
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 *  http://developer.apple.com/documentation/QuickTime/QTFF/qtff.pdf
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 * QuickTime is a trademark of Apple (AFAIK :))
58
 */
59

    
60
#include "qtpalette.h"
61

    
62

    
63
#undef NDEBUG
64
#include <assert.h>
65

    
66
/* XXX: it's the first time I make a recursive parser I think... sorry if it's ugly :P */
67

    
68
/* those functions parse an atom */
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/* return code:
70
  0: continue to parse next atom
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 <0: error occurred, exit
72
*/
73
/* links atom IDs to parse functions */
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typedef struct MOVParseTableEntry {
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    uint32_t type;
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    int (*parse)(MOVContext *ctx, ByteIOContext *pb, MOVAtom atom);
77
} MOVParseTableEntry;
78

    
79
static const MOVParseTableEntry mov_default_parse_table[];
80

    
81
static int mov_metadata_trkn(MOVContext *c, ByteIOContext *pb, unsigned len)
82
{
83
    char buf[16];
84

    
85
    get_be16(pb); // unknown
86
    snprintf(buf, sizeof(buf), "%d", get_be16(pb));
87
    av_metadata_set2(&c->fc->metadata, "track", buf, 0);
88

    
89
    get_be16(pb); // total tracks
90

    
91
    return 0;
92
}
93

    
94
static const uint32_t mac_to_unicode[128] = {
95
    0x00C4,0x00C5,0x00C7,0x00C9,0x00D1,0x00D6,0x00DC,0x00E1,
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    0x00E0,0x00E2,0x00E4,0x00E3,0x00E5,0x00E7,0x00E9,0x00E8,
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    0x00EA,0x00EB,0x00ED,0x00EC,0x00EE,0x00EF,0x00F1,0x00F3,
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    0x00F2,0x00F4,0x00F6,0x00F5,0x00FA,0x00F9,0x00FB,0x00FC,
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    0x2020,0x00B0,0x00A2,0x00A3,0x00A7,0x2022,0x00B6,0x00DF,
100
    0x00AE,0x00A9,0x2122,0x00B4,0x00A8,0x2260,0x00C6,0x00D8,
101
    0x221E,0x00B1,0x2264,0x2265,0x00A5,0x00B5,0x2202,0x2211,
102
    0x220F,0x03C0,0x222B,0x00AA,0x00BA,0x03A9,0x00E6,0x00F8,
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    0x00BF,0x00A1,0x00AC,0x221A,0x0192,0x2248,0x2206,0x00AB,
104
    0x00BB,0x2026,0x00A0,0x00C0,0x00C3,0x00D5,0x0152,0x0153,
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    0x2013,0x2014,0x201C,0x201D,0x2018,0x2019,0x00F7,0x25CA,
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    0x00FF,0x0178,0x2044,0x20AC,0x2039,0x203A,0xFB01,0xFB02,
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    0x2021,0x00B7,0x201A,0x201E,0x2030,0x00C2,0x00CA,0x00C1,
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    0x00CB,0x00C8,0x00CD,0x00CE,0x00CF,0x00CC,0x00D3,0x00D4,
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    0xF8FF,0x00D2,0x00DA,0x00DB,0x00D9,0x0131,0x02C6,0x02DC,
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    0x00AF,0x02D8,0x02D9,0x02DA,0x00B8,0x02DD,0x02DB,0x02C7,
111
};
112

    
113
static int mov_read_mac_string(MOVContext *c, ByteIOContext *pb, int len,
114
                               char *dst, int dstlen)
115
{
116
    char *p = dst;
117
    char *end = dst+dstlen-1;
118
    int i;
119

    
120
    for (i = 0; i < len; i++) {
121
        uint8_t t, c = get_byte(pb);
122
        if (c < 0x80 && p < end)
123
            *p++ = c;
124
        else
125
            PUT_UTF8(mac_to_unicode[c-0x80], t, if (p < end) *p++ = t;);
126
    }
127
    *p = 0;
128
    return p - dst;
129
}
130

    
131
static int mov_read_udta_string(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
132
{
133
#ifdef MOV_EXPORT_ALL_METADATA
134
    char tmp_key[5];
135
#endif
136
    char str[1024], key2[16], language[4] = {0};
137
    const char *key = NULL;
138
    uint16_t str_size, langcode = 0;
139
    uint32_t data_type = 0;
140
    int (*parse)(MOVContext*, ByteIOContext*, unsigned) = NULL;
141

    
142
    switch (atom.type) {
143
    case MKTAG(0xa9,'n','a','m'): key = "title";     break;
144
    case MKTAG(0xa9,'a','u','t'):
145
    case MKTAG(0xa9,'A','R','T'): key = "artist";    break;
146
    case MKTAG(0xa9,'w','r','t'): key = "composer";  break;
147
    case MKTAG( 'c','p','r','t'):
148
    case MKTAG(0xa9,'c','p','y'): key = "copyright"; break;
149
    case MKTAG(0xa9,'c','m','t'):
150
    case MKTAG(0xa9,'i','n','f'): key = "comment";   break;
151
    case MKTAG(0xa9,'a','l','b'): key = "album";     break;
152
    case MKTAG(0xa9,'d','a','y'): key = "date";      break;
153
    case MKTAG(0xa9,'g','e','n'): key = "genre";     break;
154
    case MKTAG(0xa9,'t','o','o'):
155
    case MKTAG(0xa9,'s','w','r'): key = "encoder";   break;
156
    case MKTAG(0xa9,'e','n','c'): key = "encoder";   break;
157
    case MKTAG( 'd','e','s','c'): key = "description";break;
158
    case MKTAG( 'l','d','e','s'): key = "synopsis";  break;
159
    case MKTAG( 't','v','s','h'): key = "show";      break;
160
    case MKTAG( 't','v','e','n'): key = "episode_id";break;
161
    case MKTAG( 't','v','n','n'): key = "network";   break;
162
    case MKTAG( 't','r','k','n'): key = "track";
163
        parse = mov_metadata_trkn; break;
164
    }
165

    
166
    if (c->itunes_metadata && atom.size > 8) {
167
        int data_size = get_be32(pb);
168
        int tag = get_le32(pb);
169
        if (tag == MKTAG('d','a','t','a')) {
170
            data_type = get_be32(pb); // type
171
            get_be32(pb); // unknown
172
            str_size = data_size - 16;
173
            atom.size -= 16;
174
        } else return 0;
175
    } else if (atom.size > 4 && key && !c->itunes_metadata) {
176
        str_size = get_be16(pb); // string length
177
        langcode = get_be16(pb);
178
        ff_mov_lang_to_iso639(langcode, language);
179
        atom.size -= 4;
180
    } else
181
        str_size = atom.size;
182

    
183
#ifdef MOV_EXPORT_ALL_METADATA
184
    if (!key) {
185
        snprintf(tmp_key, 5, "%.4s", (char*)&atom.type);
186
        key = tmp_key;
187
    }
188
#endif
189

    
190
    if (!key)
191
        return 0;
192
    if (atom.size < 0)
193
        return -1;
194

    
195
    str_size = FFMIN3(sizeof(str)-1, str_size, atom.size);
196

    
197
    if (parse)
198
        parse(c, pb, str_size);
199
    else {
200
        if (data_type == 3 || (data_type == 0 && langcode < 0x800)) { // MAC Encoded
201
            mov_read_mac_string(c, pb, str_size, str, sizeof(str));
202
        } else {
203
            get_buffer(pb, str, str_size);
204
            str[str_size] = 0;
205
        }
206
        av_metadata_set2(&c->fc->metadata, key, str, 0);
207
        if (*language && strcmp(language, "und")) {
208
            snprintf(key2, sizeof(key2), "%s-%s", key, language);
209
            av_metadata_set2(&c->fc->metadata, key2, str, 0);
210
        }
211
    }
212
#ifdef DEBUG_METADATA
213
    av_log(c->fc, AV_LOG_DEBUG, "lang \"%3s\" ", language);
214
    av_log(c->fc, AV_LOG_DEBUG, "tag \"%s\" value \"%s\" atom \"%.4s\" %d %lld\n",
215
           key, str, (char*)&atom.type, str_size, atom.size);
216
#endif
217

    
218
    return 0;
219
}
220

    
221
static int mov_read_chpl(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
222
{
223
    int64_t start;
224
    int i, nb_chapters, str_len, version;
225
    char str[256+1];
226

    
227
    if ((atom.size -= 5) < 0)
228
        return 0;
229

    
230
    version = get_byte(pb);
231
    get_be24(pb);
232
    if (version)
233
        get_be32(pb); // ???
234
    nb_chapters = get_byte(pb);
235

    
236
    for (i = 0; i < nb_chapters; i++) {
237
        if (atom.size < 9)
238
            return 0;
239

    
240
        start = get_be64(pb);
241
        str_len = get_byte(pb);
242

    
243
        if ((atom.size -= 9+str_len) < 0)
244
            return 0;
245

    
246
        get_buffer(pb, str, str_len);
247
        str[str_len] = 0;
248
        ff_new_chapter(c->fc, i, (AVRational){1,10000000}, start, AV_NOPTS_VALUE, str);
249
    }
250
    return 0;
251
}
252

    
253
static int mov_read_default(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
254
{
255
    int64_t total_size = 0;
256
    MOVAtom a;
257
    int i;
258

    
259
    if (atom.size < 0)
260
        atom.size = INT64_MAX;
261
    while (total_size + 8 < atom.size && !url_feof(pb)) {
262
        int (*parse)(MOVContext*, ByteIOContext*, MOVAtom) = NULL;
263
        a.size = atom.size;
264
        a.type=0;
265
        if(atom.size >= 8) {
266
            a.size = get_be32(pb);
267
            a.type = get_le32(pb);
268
        }
269
        dprintf(c->fc, "type: %08x '%.4s' parent:'%.4s' sz: %"PRId64" %"PRId64" %"PRId64"\n",
270
                a.type, (char*)&a.type, (char*)&atom.type, a.size, total_size, atom.size);
271
        total_size += 8;
272
        if (a.size == 1) { /* 64 bit extended size */
273
            a.size = get_be64(pb) - 8;
274
            total_size += 8;
275
        }
276
        if (a.size == 0) {
277
            a.size = atom.size - total_size;
278
            if (a.size <= 8)
279
                break;
280
        }
281
        a.size -= 8;
282
        if(a.size < 0)
283
            break;
284
        a.size = FFMIN(a.size, atom.size - total_size);
285

    
286
        for (i = 0; mov_default_parse_table[i].type; i++)
287
            if (mov_default_parse_table[i].type == a.type) {
288
                parse = mov_default_parse_table[i].parse;
289
                break;
290
            }
291

    
292
        // container is user data
293
        if (!parse && (atom.type == MKTAG('u','d','t','a') ||
294
                       atom.type == MKTAG('i','l','s','t')))
295
            parse = mov_read_udta_string;
296

    
297
        if (!parse) { /* skip leaf atoms data */
298
            url_fskip(pb, a.size);
299
        } else {
300
            int64_t start_pos = url_ftell(pb);
301
            int64_t left;
302
            int err = parse(c, pb, a);
303
            if (err < 0)
304
                return err;
305
            if (c->found_moov && c->found_mdat &&
306
                (url_is_streamed(pb) || start_pos + a.size == url_fsize(pb)))
307
                return 0;
308
            left = a.size - url_ftell(pb) + start_pos;
309
            if (left > 0) /* skip garbage at atom end */
310
                url_fskip(pb, left);
311
        }
312

    
313
        total_size += a.size;
314
    }
315

    
316
    if (total_size < atom.size && atom.size < 0x7ffff)
317
        url_fskip(pb, atom.size - total_size);
318

    
319
    return 0;
320
}
321

    
322
static int mov_read_dref(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
323
{
324
    AVStream *st;
325
    MOVStreamContext *sc;
326
    int entries, i, j;
327

    
328
    if (c->fc->nb_streams < 1)
329
        return 0;
330
    st = c->fc->streams[c->fc->nb_streams-1];
331
    sc = st->priv_data;
332

    
333
    get_be32(pb); // version + flags
334
    entries = get_be32(pb);
335
    if (entries >= UINT_MAX / sizeof(*sc->drefs))
336
        return -1;
337
    sc->drefs = av_mallocz(entries * sizeof(*sc->drefs));
338
    if (!sc->drefs)
339
        return AVERROR(ENOMEM);
340
    sc->drefs_count = entries;
341

    
342
    for (i = 0; i < sc->drefs_count; i++) {
343
        MOVDref *dref = &sc->drefs[i];
344
        uint32_t size = get_be32(pb);
345
        int64_t next = url_ftell(pb) + size - 4;
346

    
347
        if (size < 12)
348
            return -1;
349

    
350
        dref->type = get_le32(pb);
351
        get_be32(pb); // version + flags
352
        dprintf(c->fc, "type %.4s size %d\n", (char*)&dref->type, size);
353

    
354
        if (dref->type == MKTAG('a','l','i','s') && size > 150) {
355
            /* macintosh alias record */
356
            uint16_t volume_len, len;
357
            int16_t type;
358

    
359
            url_fskip(pb, 10);
360

    
361
            volume_len = get_byte(pb);
362
            volume_len = FFMIN(volume_len, 27);
363
            get_buffer(pb, dref->volume, 27);
364
            dref->volume[volume_len] = 0;
365
            av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", dref->volume, volume_len);
366

    
367
            url_fskip(pb, 12);
368

    
369
            len = get_byte(pb);
370
            len = FFMIN(len, 63);
371
            get_buffer(pb, dref->filename, 63);
372
            dref->filename[len] = 0;
373
            av_log(c->fc, AV_LOG_DEBUG, "filename %s, len %d\n", dref->filename, len);
374

    
375
            url_fskip(pb, 16);
376

    
377
            /* read next level up_from_alias/down_to_target */
378
            dref->nlvl_from = get_be16(pb);
379
            dref->nlvl_to   = get_be16(pb);
380
            av_log(c->fc, AV_LOG_DEBUG, "nlvl from %d, nlvl to %d\n",
381
                   dref->nlvl_from, dref->nlvl_to);
382

    
383
            url_fskip(pb, 16);
384

    
385
            for (type = 0; type != -1 && url_ftell(pb) < next; ) {
386
                type = get_be16(pb);
387
                len = get_be16(pb);
388
                av_log(c->fc, AV_LOG_DEBUG, "type %d, len %d\n", type, len);
389
                if (len&1)
390
                    len += 1;
391
                if (type == 2) { // absolute path
392
                    av_free(dref->path);
393
                    dref->path = av_mallocz(len+1);
394
                    if (!dref->path)
395
                        return AVERROR(ENOMEM);
396
                    get_buffer(pb, dref->path, len);
397
                    if (len > volume_len && !strncmp(dref->path, dref->volume, volume_len)) {
398
                        len -= volume_len;
399
                        memmove(dref->path, dref->path+volume_len, len);
400
                        dref->path[len] = 0;
401
                    }
402
                    for (j = 0; j < len; j++)
403
                        if (dref->path[j] == ':')
404
                            dref->path[j] = '/';
405
                    av_log(c->fc, AV_LOG_DEBUG, "path %s\n", dref->path);
406
                } else if (type == 0) { // directory name
407
                    av_free(dref->dir);
408
                    dref->dir = av_malloc(len+1);
409
                    if (!dref->dir)
410
                        return AVERROR(ENOMEM);
411
                    get_buffer(pb, dref->dir, len);
412
                    dref->dir[len] = 0;
413
                    for (j = 0; j < len; j++)
414
                        if (dref->dir[j] == ':')
415
                            dref->dir[j] = '/';
416
                    av_log(c->fc, AV_LOG_DEBUG, "dir %s\n", dref->dir);
417
                } else
418
                    url_fskip(pb, len);
419
            }
420
        }
421
        url_fseek(pb, next, SEEK_SET);
422
    }
423
    return 0;
424
}
425

    
426
static int mov_read_hdlr(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
427
{
428
    AVStream *st;
429
    uint32_t type;
430
    uint32_t ctype;
431

    
432
    if (c->fc->nb_streams < 1) // meta before first trak
433
        return 0;
434

    
435
    st = c->fc->streams[c->fc->nb_streams-1];
436

    
437
    get_byte(pb); /* version */
438
    get_be24(pb); /* flags */
439

    
440
    /* component type */
441
    ctype = get_le32(pb);
442
    type = get_le32(pb); /* component subtype */
443

    
444
    dprintf(c->fc, "ctype= %.4s (0x%08x)\n", (char*)&ctype, ctype);
445
    dprintf(c->fc, "stype= %.4s\n", (char*)&type);
446

    
447
    if     (type == MKTAG('v','i','d','e'))
448
        st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
449
    else if(type == MKTAG('s','o','u','n'))
450
        st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
451
    else if(type == MKTAG('m','1','a',' '))
452
        st->codec->codec_id = CODEC_ID_MP2;
453
    else if(type == MKTAG('s','u','b','p'))
454
        st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
455

    
456
    get_be32(pb); /* component  manufacture */
457
    get_be32(pb); /* component flags */
458
    get_be32(pb); /* component flags mask */
459

    
460
    return 0;
461
}
462

    
463
int ff_mov_read_esds(AVFormatContext *fc, ByteIOContext *pb, MOVAtom atom)
464
{
465
    AVStream *st;
466
    int tag, len;
467

    
468
    if (fc->nb_streams < 1)
469
        return 0;
470
    st = fc->streams[fc->nb_streams-1];
471

    
472
    get_be32(pb); /* version + flags */
473
    len = ff_mp4_read_descr(fc, pb, &tag);
474
    if (tag == MP4ESDescrTag) {
475
        get_be16(pb); /* ID */
476
        get_byte(pb); /* priority */
477
    } else
478
        get_be16(pb); /* ID */
479

    
480
    len = ff_mp4_read_descr(fc, pb, &tag);
481
    if (tag == MP4DecConfigDescrTag)
482
        ff_mp4_read_dec_config_descr(fc, st, pb);
483
    return 0;
484
}
485

    
486
static int mov_read_esds(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
487
{
488
    return ff_mov_read_esds(c->fc, pb, atom);
489
}
490

    
491
static int mov_read_dac3(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
492
{
493
    AVStream *st;
494
    int ac3info, acmod, lfeon;
495

    
496
    if (c->fc->nb_streams < 1)
497
        return 0;
498
    st = c->fc->streams[c->fc->nb_streams-1];
499

    
500
    ac3info = get_be24(pb);
501
    acmod = (ac3info >> 11) & 0x7;
502
    lfeon = (ac3info >> 10) & 0x1;
503
    st->codec->channels = ((int[]){2,1,2,3,3,4,4,5})[acmod] + lfeon;
504

    
505
    return 0;
506
}
507

    
508
static int mov_read_pasp(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
509
{
510
    const int num = get_be32(pb);
511
    const int den = get_be32(pb);
512
    AVStream *st;
513

    
514
    if (c->fc->nb_streams < 1)
515
        return 0;
516
    st = c->fc->streams[c->fc->nb_streams-1];
517

    
518
    if ((st->sample_aspect_ratio.den != 1 || st->sample_aspect_ratio.num) && // default
519
        (den != st->sample_aspect_ratio.den || num != st->sample_aspect_ratio.num)) {
520
        av_log(c->fc, AV_LOG_WARNING,
521
               "sample aspect ratio already set to %d:%d, ignoring 'pasp' atom (%d:%d)\n",
522
               st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
523
               num, den);
524
    } else if (den != 0) {
525
        st->sample_aspect_ratio.num = num;
526
        st->sample_aspect_ratio.den = den;
527
    }
528
    return 0;
529
}
530

    
531
/* this atom contains actual media data */
532
static int mov_read_mdat(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
533
{
534
    if(atom.size == 0) /* wrong one (MP4) */
535
        return 0;
536
    c->found_mdat=1;
537
    return 0; /* now go for moov */
538
}
539

    
540
/* read major brand, minor version and compatible brands and store them as metadata */
541
static int mov_read_ftyp(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
542
{
543
    uint32_t minor_ver;
544
    int comp_brand_size;
545
    char minor_ver_str[11]; /* 32 bit integer -> 10 digits + null */
546
    char* comp_brands_str;
547
    uint8_t type[5] = {0};
548

    
549
    get_buffer(pb, type, 4);
550
    if (strcmp(type, "qt  "))
551
        c->isom = 1;
552
    av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
553
    av_metadata_set2(&c->fc->metadata, "major_brand", type, 0);
554
    minor_ver = get_be32(pb); /* minor version */
555
    snprintf(minor_ver_str, sizeof(minor_ver_str), "%d", minor_ver);
556
    av_metadata_set2(&c->fc->metadata, "minor_version", minor_ver_str, 0);
557

    
558
    comp_brand_size = atom.size - 8;
559
    if (comp_brand_size < 0)
560
        return -1;
561
    comp_brands_str = av_malloc(comp_brand_size + 1); /* Add null terminator */
562
    if (!comp_brands_str)
563
        return AVERROR(ENOMEM);
564
    get_buffer(pb, comp_brands_str, comp_brand_size);
565
    comp_brands_str[comp_brand_size] = 0;
566
    av_metadata_set2(&c->fc->metadata, "compatible_brands", comp_brands_str, 0);
567
    av_freep(&comp_brands_str);
568

    
569
    return 0;
570
}
571

    
572
/* this atom should contain all header atoms */
573
static int mov_read_moov(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
574
{
575
    if (mov_read_default(c, pb, atom) < 0)
576
        return -1;
577
    /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
578
    /* so we don't parse the whole file if over a network */
579
    c->found_moov=1;
580
    return 0; /* now go for mdat */
581
}
582

    
583
static int mov_read_moof(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
584
{
585
    c->fragment.moof_offset = url_ftell(pb) - 8;
586
    dprintf(c->fc, "moof offset %llx\n", c->fragment.moof_offset);
587
    return mov_read_default(c, pb, atom);
588
}
589

    
590
static void mov_metadata_creation_time(AVMetadata **metadata, time_t time)
591
{
592
    char buffer[32];
593
    if (time) {
594
        struct tm *ptm;
595
        time -= 2082844800;  /* seconds between 1904-01-01 and Epoch */
596
        ptm = gmtime(&time);
597
        if (!ptm) return;
598
        strftime(buffer, sizeof(buffer), "%Y-%m-%d %H:%M:%S", ptm);
599
        av_metadata_set2(metadata, "creation_time", buffer, 0);
600
    }
601
}
602

    
603
static int mov_read_mdhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
604
{
605
    AVStream *st;
606
    MOVStreamContext *sc;
607
    int version;
608
    char language[4] = {0};
609
    unsigned lang;
610
    time_t creation_time;
611

    
612
    if (c->fc->nb_streams < 1)
613
        return 0;
614
    st = c->fc->streams[c->fc->nb_streams-1];
615
    sc = st->priv_data;
616

    
617
    version = get_byte(pb);
618
    if (version > 1)
619
        return -1; /* unsupported */
620

    
621
    get_be24(pb); /* flags */
622
    if (version == 1) {
623
        creation_time = get_be64(pb);
624
        get_be64(pb);
625
    } else {
626
        creation_time = get_be32(pb);
627
        get_be32(pb); /* modification time */
628
    }
629
    mov_metadata_creation_time(&st->metadata, creation_time);
630

    
631
    sc->time_scale = get_be32(pb);
632
    st->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */
633

    
634
    lang = get_be16(pb); /* language */
635
    if (ff_mov_lang_to_iso639(lang, language))
636
        av_metadata_set2(&st->metadata, "language", language, 0);
637
    get_be16(pb); /* quality */
638

    
639
    return 0;
640
}
641

    
642
static int mov_read_mvhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
643
{
644
    time_t creation_time;
645
    int version = get_byte(pb); /* version */
646
    get_be24(pb); /* flags */
647

    
648
    if (version == 1) {
649
        creation_time = get_be64(pb);
650
        get_be64(pb);
651
    } else {
652
        creation_time = get_be32(pb);
653
        get_be32(pb); /* modification time */
654
    }
655
    mov_metadata_creation_time(&c->fc->metadata, creation_time);
656
    c->time_scale = get_be32(pb); /* time scale */
657

    
658
    dprintf(c->fc, "time scale = %i\n", c->time_scale);
659

    
660
    c->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */
661
    get_be32(pb); /* preferred scale */
662

    
663
    get_be16(pb); /* preferred volume */
664

    
665
    url_fskip(pb, 10); /* reserved */
666

    
667
    url_fskip(pb, 36); /* display matrix */
668

    
669
    get_be32(pb); /* preview time */
670
    get_be32(pb); /* preview duration */
671
    get_be32(pb); /* poster time */
672
    get_be32(pb); /* selection time */
673
    get_be32(pb); /* selection duration */
674
    get_be32(pb); /* current time */
675
    get_be32(pb); /* next track ID */
676

    
677
    return 0;
678
}
679

    
680
static int mov_read_smi(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
681
{
682
    AVStream *st;
683

    
684
    if (c->fc->nb_streams < 1)
685
        return 0;
686
    st = c->fc->streams[c->fc->nb_streams-1];
687

    
688
    if((uint64_t)atom.size > (1<<30))
689
        return -1;
690

    
691
    // currently SVQ3 decoder expect full STSD header - so let's fake it
692
    // this should be fixed and just SMI header should be passed
693
    av_free(st->codec->extradata);
694
    st->codec->extradata = av_mallocz(atom.size + 0x5a + FF_INPUT_BUFFER_PADDING_SIZE);
695
    if (!st->codec->extradata)
696
        return AVERROR(ENOMEM);
697
    st->codec->extradata_size = 0x5a + atom.size;
698
    memcpy(st->codec->extradata, "SVQ3", 4); // fake
699
    get_buffer(pb, st->codec->extradata + 0x5a, atom.size);
700
    dprintf(c->fc, "Reading SMI %"PRId64"  %s\n", atom.size, st->codec->extradata + 0x5a);
701
    return 0;
702
}
703

    
704
static int mov_read_enda(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
705
{
706
    AVStream *st;
707
    int little_endian;
708

    
709
    if (c->fc->nb_streams < 1)
710
        return 0;
711
    st = c->fc->streams[c->fc->nb_streams-1];
712

    
713
    little_endian = get_be16(pb);
714
    dprintf(c->fc, "enda %d\n", little_endian);
715
    if (little_endian == 1) {
716
        switch (st->codec->codec_id) {
717
        case CODEC_ID_PCM_S24BE:
718
            st->codec->codec_id = CODEC_ID_PCM_S24LE;
719
            break;
720
        case CODEC_ID_PCM_S32BE:
721
            st->codec->codec_id = CODEC_ID_PCM_S32LE;
722
            break;
723
        case CODEC_ID_PCM_F32BE:
724
            st->codec->codec_id = CODEC_ID_PCM_F32LE;
725
            break;
726
        case CODEC_ID_PCM_F64BE:
727
            st->codec->codec_id = CODEC_ID_PCM_F64LE;
728
            break;
729
        default:
730
            break;
731
        }
732
    }
733
    return 0;
734
}
735

    
736
/* FIXME modify qdm2/svq3/h264 decoders to take full atom as extradata */
737
static int mov_read_extradata(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
738
{
739
    AVStream *st;
740
    uint64_t size;
741
    uint8_t *buf;
742

    
743
    if (c->fc->nb_streams < 1) // will happen with jp2 files
744
        return 0;
745
    st= c->fc->streams[c->fc->nb_streams-1];
746
    size= (uint64_t)st->codec->extradata_size + atom.size + 8 + FF_INPUT_BUFFER_PADDING_SIZE;
747
    if(size > INT_MAX || (uint64_t)atom.size > INT_MAX)
748
        return -1;
749
    buf= av_realloc(st->codec->extradata, size);
750
    if(!buf)
751
        return -1;
752
    st->codec->extradata= buf;
753
    buf+= st->codec->extradata_size;
754
    st->codec->extradata_size= size - FF_INPUT_BUFFER_PADDING_SIZE;
755
    AV_WB32(       buf    , atom.size + 8);
756
    AV_WL32(       buf + 4, atom.type);
757
    get_buffer(pb, buf + 8, atom.size);
758
    return 0;
759
}
760

    
761
static int mov_read_wave(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
762
{
763
    AVStream *st;
764

    
765
    if (c->fc->nb_streams < 1)
766
        return 0;
767
    st = c->fc->streams[c->fc->nb_streams-1];
768

    
769
    if((uint64_t)atom.size > (1<<30))
770
        return -1;
771

    
772
    if (st->codec->codec_id == CODEC_ID_QDM2) {
773
        // pass all frma atom to codec, needed at least for QDM2
774
        av_free(st->codec->extradata);
775
        st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
776
        if (!st->codec->extradata)
777
            return AVERROR(ENOMEM);
778
        st->codec->extradata_size = atom.size;
779
        get_buffer(pb, st->codec->extradata, atom.size);
780
    } else if (atom.size > 8) { /* to read frma, esds atoms */
781
        if (mov_read_default(c, pb, atom) < 0)
782
            return -1;
783
    } else
784
        url_fskip(pb, atom.size);
785
    return 0;
786
}
787

    
788
/**
789
 * This function reads atom content and puts data in extradata without tag
790
 * nor size unlike mov_read_extradata.
791
 */
792
static int mov_read_glbl(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
793
{
794
    AVStream *st;
795

    
796
    if (c->fc->nb_streams < 1)
797
        return 0;
798
    st = c->fc->streams[c->fc->nb_streams-1];
799

    
800
    if((uint64_t)atom.size > (1<<30))
801
        return -1;
802

    
803
    av_free(st->codec->extradata);
804
    st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
805
    if (!st->codec->extradata)
806
        return AVERROR(ENOMEM);
807
    st->codec->extradata_size = atom.size;
808
    get_buffer(pb, st->codec->extradata, atom.size);
809
    return 0;
810
}
811

    
812
/**
813
 * An strf atom is a BITMAPINFOHEADER struct. This struct is 40 bytes itself,
814
 * but can have extradata appended at the end after the 40 bytes belonging
815
 * to the struct.
816
 */
817
static int mov_read_strf(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
818
{
819
    AVStream *st;
820

    
821
    if (c->fc->nb_streams < 1)
822
        return 0;
823
    if (atom.size <= 40)
824
        return 0;
825
    st = c->fc->streams[c->fc->nb_streams-1];
826

    
827
    if((uint64_t)atom.size > (1<<30))
828
        return -1;
829

    
830
    av_free(st->codec->extradata);
831
    st->codec->extradata = av_mallocz(atom.size - 40 + FF_INPUT_BUFFER_PADDING_SIZE);
832
    if (!st->codec->extradata)
833
        return AVERROR(ENOMEM);
834
    st->codec->extradata_size = atom.size - 40;
835
    url_fskip(pb, 40);
836
    get_buffer(pb, st->codec->extradata, atom.size - 40);
837
    return 0;
838
}
839

    
840
static int mov_read_stco(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
841
{
842
    AVStream *st;
843
    MOVStreamContext *sc;
844
    unsigned int i, entries;
845

    
846
    if (c->fc->nb_streams < 1)
847
        return 0;
848
    st = c->fc->streams[c->fc->nb_streams-1];
849
    sc = st->priv_data;
850

    
851
    get_byte(pb); /* version */
852
    get_be24(pb); /* flags */
853

    
854
    entries = get_be32(pb);
855

    
856
    if(entries >= UINT_MAX/sizeof(int64_t))
857
        return -1;
858

    
859
    sc->chunk_offsets = av_malloc(entries * sizeof(int64_t));
860
    if (!sc->chunk_offsets)
861
        return AVERROR(ENOMEM);
862
    sc->chunk_count = entries;
863

    
864
    if      (atom.type == MKTAG('s','t','c','o'))
865
        for(i=0; i<entries; i++)
866
            sc->chunk_offsets[i] = get_be32(pb);
867
    else if (atom.type == MKTAG('c','o','6','4'))
868
        for(i=0; i<entries; i++)
869
            sc->chunk_offsets[i] = get_be64(pb);
870
    else
871
        return -1;
872

    
873
    return 0;
874
}
875

    
876
/**
877
 * Compute codec id for 'lpcm' tag.
878
 * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
879
 */
880
enum CodecID ff_mov_get_lpcm_codec_id(int bps, int flags)
881
{
882
    if (flags & 1) { // floating point
883
        if (flags & 2) { // big endian
884
            if      (bps == 32) return CODEC_ID_PCM_F32BE;
885
            else if (bps == 64) return CODEC_ID_PCM_F64BE;
886
        } else {
887
            if      (bps == 32) return CODEC_ID_PCM_F32LE;
888
            else if (bps == 64) return CODEC_ID_PCM_F64LE;
889
        }
890
    } else {
891
        if (flags & 2) {
892
            if      (bps == 8)
893
                // signed integer
894
                if (flags & 4)  return CODEC_ID_PCM_S8;
895
                else            return CODEC_ID_PCM_U8;
896
            else if (bps == 16) return CODEC_ID_PCM_S16BE;
897
            else if (bps == 24) return CODEC_ID_PCM_S24BE;
898
            else if (bps == 32) return CODEC_ID_PCM_S32BE;
899
        } else {
900
            if      (bps == 8)
901
                if (flags & 4)  return CODEC_ID_PCM_S8;
902
                else            return CODEC_ID_PCM_U8;
903
            else if (bps == 16) return CODEC_ID_PCM_S16LE;
904
            else if (bps == 24) return CODEC_ID_PCM_S24LE;
905
            else if (bps == 32) return CODEC_ID_PCM_S32LE;
906
        }
907
    }
908
    return CODEC_ID_NONE;
909
}
910

    
911
int ff_mov_read_stsd_entries(MOVContext *c, ByteIOContext *pb, int entries)
912
{
913
    AVStream *st;
914
    MOVStreamContext *sc;
915
    int j, pseudo_stream_id;
916

    
917
    if (c->fc->nb_streams < 1)
918
        return 0;
919
    st = c->fc->streams[c->fc->nb_streams-1];
920
    sc = st->priv_data;
921

    
922
    for(pseudo_stream_id=0; pseudo_stream_id<entries; pseudo_stream_id++) {
923
        //Parsing Sample description table
924
        enum CodecID id;
925
        int dref_id = 1;
926
        MOVAtom a = { AV_RL32("stsd") };
927
        int64_t start_pos = url_ftell(pb);
928
        int size = get_be32(pb); /* size */
929
        uint32_t format = get_le32(pb); /* data format */
930

    
931
        if (size >= 16) {
932
            get_be32(pb); /* reserved */
933
            get_be16(pb); /* reserved */
934
            dref_id = get_be16(pb);
935
        }
936

    
937
        if (st->codec->codec_tag &&
938
            st->codec->codec_tag != format &&
939
            (c->fc->video_codec_id ? ff_codec_get_id(codec_movvideo_tags, format) != c->fc->video_codec_id
940
                                   : st->codec->codec_tag != MKTAG('j','p','e','g'))
941
           ){
942
            /* Multiple fourcc, we skip JPEG. This is not correct, we should
943
             * export it as a separate AVStream but this needs a few changes
944
             * in the MOV demuxer, patch welcome. */
945
        multiple_stsd:
946
            av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
947
            url_fskip(pb, size - (url_ftell(pb) - start_pos));
948
            continue;
949
        }
950
        /* we cannot demux concatenated h264 streams because of different extradata */
951
        if (st->codec->codec_tag && st->codec->codec_tag == AV_RL32("avc1"))
952
            goto multiple_stsd;
953
        sc->pseudo_stream_id = st->codec->codec_tag ? -1 : pseudo_stream_id;
954
        sc->dref_id= dref_id;
955

    
956
        st->codec->codec_tag = format;
957
        id = ff_codec_get_id(codec_movaudio_tags, format);
958
        if (id<=0 && ((format&0xFFFF) == 'm'+('s'<<8) || (format&0xFFFF) == 'T'+('S'<<8)))
959
            id = ff_codec_get_id(ff_codec_wav_tags, av_bswap32(format)&0xFFFF);
960

    
961
        if (st->codec->codec_type != AVMEDIA_TYPE_VIDEO && id > 0) {
962
            st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
963
        } else if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO && /* do not overwrite codec type */
964
                   format && format != MKTAG('m','p','4','s')) { /* skip old asf mpeg4 tag */
965
            id = ff_codec_get_id(codec_movvideo_tags, format);
966
            if (id <= 0)
967
                id = ff_codec_get_id(ff_codec_bmp_tags, format);
968
            if (id > 0)
969
                st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
970
            else if(st->codec->codec_type == AVMEDIA_TYPE_DATA){
971
                id = ff_codec_get_id(ff_codec_movsubtitle_tags, format);
972
                if(id > 0)
973
                    st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
974
            }
975
        }
976

    
977
        dprintf(c->fc, "size=%d 4CC= %c%c%c%c codec_type=%d\n", size,
978
                (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff,
979
                (format >> 24) & 0xff, st->codec->codec_type);
980

    
981
        if(st->codec->codec_type==AVMEDIA_TYPE_VIDEO) {
982
            unsigned int color_depth, len;
983
            int color_greyscale;
984

    
985
            st->codec->codec_id = id;
986
            get_be16(pb); /* version */
987
            get_be16(pb); /* revision level */
988
            get_be32(pb); /* vendor */
989
            get_be32(pb); /* temporal quality */
990
            get_be32(pb); /* spatial quality */
991

    
992
            st->codec->width = get_be16(pb); /* width */
993
            st->codec->height = get_be16(pb); /* height */
994

    
995
            get_be32(pb); /* horiz resolution */
996
            get_be32(pb); /* vert resolution */
997
            get_be32(pb); /* data size, always 0 */
998
            get_be16(pb); /* frames per samples */
999

    
1000
            len = get_byte(pb); /* codec name, pascal string */
1001
            if (len > 31)
1002
                len = 31;
1003
            mov_read_mac_string(c, pb, len, st->codec->codec_name, 32);
1004
            if (len < 31)
1005
                url_fskip(pb, 31 - len);
1006
            /* codec_tag YV12 triggers an UV swap in rawdec.c */
1007
            if (!memcmp(st->codec->codec_name, "Planar Y'CbCr 8-bit 4:2:0", 25))
1008
                st->codec->codec_tag=MKTAG('I', '4', '2', '0');
1009

    
1010
            st->codec->bits_per_coded_sample = get_be16(pb); /* depth */
1011
            st->codec->color_table_id = get_be16(pb); /* colortable id */
1012
            dprintf(c->fc, "depth %d, ctab id %d\n",
1013
                   st->codec->bits_per_coded_sample, st->codec->color_table_id);
1014
            /* figure out the palette situation */
1015
            color_depth = st->codec->bits_per_coded_sample & 0x1F;
1016
            color_greyscale = st->codec->bits_per_coded_sample & 0x20;
1017

    
1018
            /* if the depth is 2, 4, or 8 bpp, file is palettized */
1019
            if ((color_depth == 2) || (color_depth == 4) ||
1020
                (color_depth == 8)) {
1021
                /* for palette traversal */
1022
                unsigned int color_start, color_count, color_end;
1023
                unsigned char r, g, b;
1024

    
1025
                st->codec->palctrl = av_malloc(sizeof(*st->codec->palctrl));
1026
                if (color_greyscale) {
1027
                    int color_index, color_dec;
1028
                    /* compute the greyscale palette */
1029
                    st->codec->bits_per_coded_sample = color_depth;
1030
                    color_count = 1 << color_depth;
1031
                    color_index = 255;
1032
                    color_dec = 256 / (color_count - 1);
1033
                    for (j = 0; j < color_count; j++) {
1034
                        r = g = b = color_index;
1035
                        st->codec->palctrl->palette[j] =
1036
                            (r << 16) | (g << 8) | (b);
1037
                        color_index -= color_dec;
1038
                        if (color_index < 0)
1039
                            color_index = 0;
1040
                    }
1041
                } else if (st->codec->color_table_id) {
1042
                    const uint8_t *color_table;
1043
                    /* if flag bit 3 is set, use the default palette */
1044
                    color_count = 1 << color_depth;
1045
                    if (color_depth == 2)
1046
                        color_table = ff_qt_default_palette_4;
1047
                    else if (color_depth == 4)
1048
                        color_table = ff_qt_default_palette_16;
1049
                    else
1050
                        color_table = ff_qt_default_palette_256;
1051

    
1052
                    for (j = 0; j < color_count; j++) {
1053
                        r = color_table[j * 3 + 0];
1054
                        g = color_table[j * 3 + 1];
1055
                        b = color_table[j * 3 + 2];
1056
                        st->codec->palctrl->palette[j] =
1057
                            (r << 16) | (g << 8) | (b);
1058
                    }
1059
                } else {
1060
                    /* load the palette from the file */
1061
                    color_start = get_be32(pb);
1062
                    color_count = get_be16(pb);
1063
                    color_end = get_be16(pb);
1064
                    if ((color_start <= 255) &&
1065
                        (color_end <= 255)) {
1066
                        for (j = color_start; j <= color_end; j++) {
1067
                            /* each R, G, or B component is 16 bits;
1068
                             * only use the top 8 bits; skip alpha bytes
1069
                             * up front */
1070
                            get_byte(pb);
1071
                            get_byte(pb);
1072
                            r = get_byte(pb);
1073
                            get_byte(pb);
1074
                            g = get_byte(pb);
1075
                            get_byte(pb);
1076
                            b = get_byte(pb);
1077
                            get_byte(pb);
1078
                            st->codec->palctrl->palette[j] =
1079
                                (r << 16) | (g << 8) | (b);
1080
                        }
1081
                    }
1082
                }
1083
                st->codec->palctrl->palette_changed = 1;
1084
            }
1085
        } else if(st->codec->codec_type==AVMEDIA_TYPE_AUDIO) {
1086
            int bits_per_sample, flags;
1087
            uint16_t version = get_be16(pb);
1088

    
1089
            st->codec->codec_id = id;
1090
            get_be16(pb); /* revision level */
1091
            get_be32(pb); /* vendor */
1092

    
1093
            st->codec->channels = get_be16(pb);             /* channel count */
1094
            dprintf(c->fc, "audio channels %d\n", st->codec->channels);
1095
            st->codec->bits_per_coded_sample = get_be16(pb);      /* sample size */
1096

    
1097
            sc->audio_cid = get_be16(pb);
1098
            get_be16(pb); /* packet size = 0 */
1099

    
1100
            st->codec->sample_rate = ((get_be32(pb) >> 16));
1101

    
1102
            //Read QT version 1 fields. In version 0 these do not exist.
1103
            dprintf(c->fc, "version =%d, isom =%d\n",version,c->isom);
1104
            if(!c->isom) {
1105
                if(version==1) {
1106
                    sc->samples_per_frame = get_be32(pb);
1107
                    get_be32(pb); /* bytes per packet */
1108
                    sc->bytes_per_frame = get_be32(pb);
1109
                    get_be32(pb); /* bytes per sample */
1110
                } else if(version==2) {
1111
                    get_be32(pb); /* sizeof struct only */
1112
                    st->codec->sample_rate = av_int2dbl(get_be64(pb)); /* float 64 */
1113
                    st->codec->channels = get_be32(pb);
1114
                    get_be32(pb); /* always 0x7F000000 */
1115
                    st->codec->bits_per_coded_sample = get_be32(pb); /* bits per channel if sound is uncompressed */
1116
                    flags = get_be32(pb); /* lpcm format specific flag */
1117
                    sc->bytes_per_frame = get_be32(pb); /* bytes per audio packet if constant */
1118
                    sc->samples_per_frame = get_be32(pb); /* lpcm frames per audio packet if constant */
1119
                    if (format == MKTAG('l','p','c','m'))
1120
                        st->codec->codec_id = ff_mov_get_lpcm_codec_id(st->codec->bits_per_coded_sample, flags);
1121
                }
1122
            }
1123

    
1124
            switch (st->codec->codec_id) {
1125
            case CODEC_ID_PCM_S8:
1126
            case CODEC_ID_PCM_U8:
1127
                if (st->codec->bits_per_coded_sample == 16)
1128
                    st->codec->codec_id = CODEC_ID_PCM_S16BE;
1129
                break;
1130
            case CODEC_ID_PCM_S16LE:
1131
            case CODEC_ID_PCM_S16BE:
1132
                if (st->codec->bits_per_coded_sample == 8)
1133
                    st->codec->codec_id = CODEC_ID_PCM_S8;
1134
                else if (st->codec->bits_per_coded_sample == 24)
1135
                    st->codec->codec_id =
1136
                        st->codec->codec_id == CODEC_ID_PCM_S16BE ?
1137
                        CODEC_ID_PCM_S24BE : CODEC_ID_PCM_S24LE;
1138
                break;
1139
            /* set values for old format before stsd version 1 appeared */
1140
            case CODEC_ID_MACE3:
1141
                sc->samples_per_frame = 6;
1142
                sc->bytes_per_frame = 2*st->codec->channels;
1143
                break;
1144
            case CODEC_ID_MACE6:
1145
                sc->samples_per_frame = 6;
1146
                sc->bytes_per_frame = 1*st->codec->channels;
1147
                break;
1148
            case CODEC_ID_ADPCM_IMA_QT:
1149
                sc->samples_per_frame = 64;
1150
                sc->bytes_per_frame = 34*st->codec->channels;
1151
                break;
1152
            case CODEC_ID_GSM:
1153
                sc->samples_per_frame = 160;
1154
                sc->bytes_per_frame = 33;
1155
                break;
1156
            default:
1157
                break;
1158
            }
1159

    
1160
            bits_per_sample = av_get_bits_per_sample(st->codec->codec_id);
1161
            if (bits_per_sample) {
1162
                st->codec->bits_per_coded_sample = bits_per_sample;
1163
                sc->sample_size = (bits_per_sample >> 3) * st->codec->channels;
1164
            }
1165
        } else if(st->codec->codec_type==AVMEDIA_TYPE_SUBTITLE){
1166
            // ttxt stsd contains display flags, justification, background
1167
            // color, fonts, and default styles, so fake an atom to read it
1168
            MOVAtom fake_atom = { .size = size - (url_ftell(pb) - start_pos) };
1169
            if (format != AV_RL32("mp4s")) // mp4s contains a regular esds atom
1170
                mov_read_glbl(c, pb, fake_atom);
1171
            st->codec->codec_id= id;
1172
            st->codec->width = sc->width;
1173
            st->codec->height = sc->height;
1174
        } else {
1175
            /* other codec type, just skip (rtp, mp4s, tmcd ...) */
1176
            url_fskip(pb, size - (url_ftell(pb) - start_pos));
1177
        }
1178
        /* this will read extra atoms at the end (wave, alac, damr, avcC, SMI ...) */
1179
        a.size = size - (url_ftell(pb) - start_pos);
1180
        if (a.size > 8) {
1181
            if (mov_read_default(c, pb, a) < 0)
1182
                return -1;
1183
        } else if (a.size > 0)
1184
            url_fskip(pb, a.size);
1185
    }
1186

    
1187
    if(st->codec->codec_type==AVMEDIA_TYPE_AUDIO && st->codec->sample_rate==0 && sc->time_scale>1)
1188
        st->codec->sample_rate= sc->time_scale;
1189

    
1190
    /* special codec parameters handling */
1191
    switch (st->codec->codec_id) {
1192
#if CONFIG_DV_DEMUXER
1193
    case CODEC_ID_DVAUDIO:
1194
        c->dv_fctx = avformat_alloc_context();
1195
        c->dv_demux = dv_init_demux(c->dv_fctx);
1196
        if (!c->dv_demux) {
1197
            av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
1198
            return -1;
1199
        }
1200
        sc->dv_audio_container = 1;
1201
        st->codec->codec_id = CODEC_ID_PCM_S16LE;
1202
        break;
1203
#endif
1204
    /* no ifdef since parameters are always those */
1205
    case CODEC_ID_QCELP:
1206
        // force sample rate for qcelp when not stored in mov
1207
        if (st->codec->codec_tag != MKTAG('Q','c','l','p'))
1208
            st->codec->sample_rate = 8000;
1209
        st->codec->frame_size= 160;
1210
        st->codec->channels= 1; /* really needed */
1211
        break;
1212
    case CODEC_ID_AMR_NB:
1213
    case CODEC_ID_AMR_WB:
1214
        st->codec->frame_size= sc->samples_per_frame;
1215
        st->codec->channels= 1; /* really needed */
1216
        /* force sample rate for amr, stsd in 3gp does not store sample rate */
1217
        if (st->codec->codec_id == CODEC_ID_AMR_NB)
1218
            st->codec->sample_rate = 8000;
1219
        else if (st->codec->codec_id == CODEC_ID_AMR_WB)
1220
            st->codec->sample_rate = 16000;
1221
        break;
1222
    case CODEC_ID_MP2:
1223
    case CODEC_ID_MP3:
1224
        st->codec->codec_type = AVMEDIA_TYPE_AUDIO; /* force type after stsd for m1a hdlr */
1225
        st->need_parsing = AVSTREAM_PARSE_FULL;
1226
        break;
1227
    case CODEC_ID_GSM:
1228
    case CODEC_ID_ADPCM_MS:
1229
    case CODEC_ID_ADPCM_IMA_WAV:
1230
        st->codec->block_align = sc->bytes_per_frame;
1231
        break;
1232
    case CODEC_ID_ALAC:
1233
        if (st->codec->extradata_size == 36) {
1234
            st->codec->frame_size = AV_RB32(st->codec->extradata+12);
1235
            st->codec->channels   = AV_RB8 (st->codec->extradata+21);
1236
            st->codec->sample_rate = AV_RB32(st->codec->extradata+32);
1237
        }
1238
        break;
1239
    default:
1240
        break;
1241
    }
1242

    
1243
    return 0;
1244
}
1245

    
1246
static int mov_read_stsd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1247
{
1248
    int entries;
1249

    
1250
    get_byte(pb); /* version */
1251
    get_be24(pb); /* flags */
1252
    entries = get_be32(pb);
1253

    
1254
    return ff_mov_read_stsd_entries(c, pb, entries);
1255
}
1256

    
1257
static int mov_read_stsc(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1258
{
1259
    AVStream *st;
1260
    MOVStreamContext *sc;
1261
    unsigned int i, entries;
1262

    
1263
    if (c->fc->nb_streams < 1)
1264
        return 0;
1265
    st = c->fc->streams[c->fc->nb_streams-1];
1266
    sc = st->priv_data;
1267

    
1268
    get_byte(pb); /* version */
1269
    get_be24(pb); /* flags */
1270

    
1271
    entries = get_be32(pb);
1272

    
1273
    dprintf(c->fc, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
1274

    
1275
    if(entries >= UINT_MAX / sizeof(*sc->stsc_data))
1276
        return -1;
1277
    sc->stsc_data = av_malloc(entries * sizeof(*sc->stsc_data));
1278
    if (!sc->stsc_data)
1279
        return AVERROR(ENOMEM);
1280
    sc->stsc_count = entries;
1281

    
1282
    for(i=0; i<entries; i++) {
1283
        sc->stsc_data[i].first = get_be32(pb);
1284
        sc->stsc_data[i].count = get_be32(pb);
1285
        sc->stsc_data[i].id = get_be32(pb);
1286
    }
1287
    return 0;
1288
}
1289

    
1290
static int mov_read_stps(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1291
{
1292
    AVStream *st;
1293
    MOVStreamContext *sc;
1294
    unsigned i, entries;
1295

    
1296
    if (c->fc->nb_streams < 1)
1297
        return 0;
1298
    st = c->fc->streams[c->fc->nb_streams-1];
1299
    sc = st->priv_data;
1300

    
1301
    get_be32(pb); // version + flags
1302

    
1303
    entries = get_be32(pb);
1304
    if (entries >= UINT_MAX / sizeof(*sc->stps_data))
1305
        return -1;
1306
    sc->stps_data = av_malloc(entries * sizeof(*sc->stps_data));
1307
    if (!sc->stps_data)
1308
        return AVERROR(ENOMEM);
1309
    sc->stps_count = entries;
1310

    
1311
    for (i = 0; i < entries; i++) {
1312
        sc->stps_data[i] = get_be32(pb);
1313
        //dprintf(c->fc, "stps %d\n", sc->stps_data[i]);
1314
    }
1315

    
1316
    return 0;
1317
}
1318

    
1319
static int mov_read_stss(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1320
{
1321
    AVStream *st;
1322
    MOVStreamContext *sc;
1323
    unsigned int i, entries;
1324

    
1325
    if (c->fc->nb_streams < 1)
1326
        return 0;
1327
    st = c->fc->streams[c->fc->nb_streams-1];
1328
    sc = st->priv_data;
1329

    
1330
    get_byte(pb); /* version */
1331
    get_be24(pb); /* flags */
1332

    
1333
    entries = get_be32(pb);
1334

    
1335
    dprintf(c->fc, "keyframe_count = %d\n", entries);
1336

    
1337
    if(entries >= UINT_MAX / sizeof(int))
1338
        return -1;
1339
    sc->keyframes = av_malloc(entries * sizeof(int));
1340
    if (!sc->keyframes)
1341
        return AVERROR(ENOMEM);
1342
    sc->keyframe_count = entries;
1343

    
1344
    for(i=0; i<entries; i++) {
1345
        sc->keyframes[i] = get_be32(pb);
1346
        //dprintf(c->fc, "keyframes[]=%d\n", sc->keyframes[i]);
1347
    }
1348
    return 0;
1349
}
1350

    
1351
static int mov_read_stsz(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1352
{
1353
    AVStream *st;
1354
    MOVStreamContext *sc;
1355
    unsigned int i, entries, sample_size, field_size, num_bytes;
1356
    GetBitContext gb;
1357
    unsigned char* buf;
1358

    
1359
    if (c->fc->nb_streams < 1)
1360
        return 0;
1361
    st = c->fc->streams[c->fc->nb_streams-1];
1362
    sc = st->priv_data;
1363

    
1364
    get_byte(pb); /* version */
1365
    get_be24(pb); /* flags */
1366

    
1367
    if (atom.type == MKTAG('s','t','s','z')) {
1368
        sample_size = get_be32(pb);
1369
        if (!sc->sample_size) /* do not overwrite value computed in stsd */
1370
            sc->sample_size = sample_size;
1371
        field_size = 32;
1372
    } else {
1373
        sample_size = 0;
1374
        get_be24(pb); /* reserved */
1375
        field_size = get_byte(pb);
1376
    }
1377
    entries = get_be32(pb);
1378

    
1379
    dprintf(c->fc, "sample_size = %d sample_count = %d\n", sc->sample_size, entries);
1380

    
1381
    sc->sample_count = entries;
1382
    if (sample_size)
1383
        return 0;
1384

    
1385
    if (field_size != 4 && field_size != 8 && field_size != 16 && field_size != 32) {
1386
        av_log(c->fc, AV_LOG_ERROR, "Invalid sample field size %d\n", field_size);
1387
        return -1;
1388
    }
1389

    
1390
    if (entries >= UINT_MAX / sizeof(int) || entries >= (UINT_MAX - 4) / field_size)
1391
        return -1;
1392
    sc->sample_sizes = av_malloc(entries * sizeof(int));
1393
    if (!sc->sample_sizes)
1394
        return AVERROR(ENOMEM);
1395

    
1396
    num_bytes = (entries*field_size+4)>>3;
1397

    
1398
    buf = av_malloc(num_bytes+FF_INPUT_BUFFER_PADDING_SIZE);
1399
    if (!buf) {
1400
        av_freep(&sc->sample_sizes);
1401
        return AVERROR(ENOMEM);
1402
    }
1403

    
1404
    if (get_buffer(pb, buf, num_bytes) < num_bytes) {
1405
        av_freep(&sc->sample_sizes);
1406
        av_free(buf);
1407
        return -1;
1408
    }
1409

    
1410
    init_get_bits(&gb, buf, 8*num_bytes);
1411

    
1412
    for(i=0; i<entries; i++)
1413
        sc->sample_sizes[i] = get_bits_long(&gb, field_size);
1414

    
1415
    av_free(buf);
1416
    return 0;
1417
}
1418

    
1419
static int mov_read_stts(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1420
{
1421
    AVStream *st;
1422
    MOVStreamContext *sc;
1423
    unsigned int i, entries;
1424
    int64_t duration=0;
1425
    int64_t total_sample_count=0;
1426

    
1427
    if (c->fc->nb_streams < 1)
1428
        return 0;
1429
    st = c->fc->streams[c->fc->nb_streams-1];
1430
    sc = st->priv_data;
1431

    
1432
    get_byte(pb); /* version */
1433
    get_be24(pb); /* flags */
1434
    entries = get_be32(pb);
1435

    
1436
    dprintf(c->fc, "track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries);
1437

    
1438
    if(entries >= UINT_MAX / sizeof(*sc->stts_data))
1439
        return -1;
1440
    sc->stts_data = av_malloc(entries * sizeof(*sc->stts_data));
1441
    if (!sc->stts_data)
1442
        return AVERROR(ENOMEM);
1443
    sc->stts_count = entries;
1444

    
1445
    for(i=0; i<entries; i++) {
1446
        int sample_duration;
1447
        int sample_count;
1448

    
1449
        sample_count=get_be32(pb);
1450
        sample_duration = get_be32(pb);
1451
        sc->stts_data[i].count= sample_count;
1452
        sc->stts_data[i].duration= sample_duration;
1453

    
1454
        dprintf(c->fc, "sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);
1455

    
1456
        duration+=(int64_t)sample_duration*sample_count;
1457
        total_sample_count+=sample_count;
1458
    }
1459

    
1460
    st->nb_frames= total_sample_count;
1461
    if(duration)
1462
        st->duration= duration;
1463
    return 0;
1464
}
1465

    
1466
static int mov_read_ctts(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1467
{
1468
    AVStream *st;
1469
    MOVStreamContext *sc;
1470
    unsigned int i, entries;
1471

    
1472
    if (c->fc->nb_streams < 1)
1473
        return 0;
1474
    st = c->fc->streams[c->fc->nb_streams-1];
1475
    sc = st->priv_data;
1476

    
1477
    get_byte(pb); /* version */
1478
    get_be24(pb); /* flags */
1479
    entries = get_be32(pb);
1480

    
1481
    dprintf(c->fc, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
1482

    
1483
    if(entries >= UINT_MAX / sizeof(*sc->ctts_data))
1484
        return -1;
1485
    sc->ctts_data = av_malloc(entries * sizeof(*sc->ctts_data));
1486
    if (!sc->ctts_data)
1487
        return AVERROR(ENOMEM);
1488
    sc->ctts_count = entries;
1489

    
1490
    for(i=0; i<entries; i++) {
1491
        int count    =get_be32(pb);
1492
        int duration =get_be32(pb);
1493

    
1494
        sc->ctts_data[i].count   = count;
1495
        sc->ctts_data[i].duration= duration;
1496
        if (duration < 0)
1497
            sc->dts_shift = FFMAX(sc->dts_shift, -duration);
1498
    }
1499

    
1500
    dprintf(c->fc, "dts shift %d\n", sc->dts_shift);
1501

    
1502
    return 0;
1503
}
1504

    
1505
static void mov_build_index(MOVContext *mov, AVStream *st)
1506
{
1507
    MOVStreamContext *sc = st->priv_data;
1508
    int64_t current_offset;
1509
    int64_t current_dts = 0;
1510
    unsigned int stts_index = 0;
1511
    unsigned int stsc_index = 0;
1512
    unsigned int stss_index = 0;
1513
    unsigned int stps_index = 0;
1514
    unsigned int i, j;
1515
    uint64_t stream_size = 0;
1516

    
1517
    /* adjust first dts according to edit list */
1518
    if (sc->time_offset && mov->time_scale > 0) {
1519
        int rescaled = sc->time_offset < 0 ? av_rescale(sc->time_offset, sc->time_scale, mov->time_scale) : sc->time_offset;
1520
        current_dts = -rescaled;
1521
        if (sc->ctts_data && sc->stts_data &&
1522
            sc->ctts_data[0].duration / sc->stts_data[0].duration > 16) {
1523
            /* more than 16 frames delay, dts are likely wrong
1524
               this happens with files created by iMovie */
1525
            sc->wrong_dts = 1;
1526
            st->codec->has_b_frames = 1;
1527
        }
1528
    }
1529

    
1530
    /* only use old uncompressed audio chunk demuxing when stts specifies it */
1531
    if (!(st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
1532
          sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
1533
        unsigned int current_sample = 0;
1534
        unsigned int stts_sample = 0;
1535
        unsigned int sample_size;
1536
        unsigned int distance = 0;
1537
        int key_off = sc->keyframes && sc->keyframes[0] == 1;
1538

    
1539
        current_dts -= sc->dts_shift;
1540

    
1541
        if (sc->sample_count >= UINT_MAX / sizeof(*st->index_entries))
1542
            return;
1543
        st->index_entries = av_malloc(sc->sample_count*sizeof(*st->index_entries));
1544
        if (!st->index_entries)
1545
            return;
1546
        st->index_entries_allocated_size = sc->sample_count*sizeof(*st->index_entries);
1547

    
1548
        for (i = 0; i < sc->chunk_count; i++) {
1549
            current_offset = sc->chunk_offsets[i];
1550
            if (stsc_index + 1 < sc->stsc_count &&
1551
                i + 1 == sc->stsc_data[stsc_index + 1].first)
1552
                stsc_index++;
1553
            for (j = 0; j < sc->stsc_data[stsc_index].count; j++) {
1554
                int keyframe = 0;
1555
                if (current_sample >= sc->sample_count) {
1556
                    av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
1557
                    return;
1558
                }
1559

    
1560
                if (!sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index]) {
1561
                    keyframe = 1;
1562
                    if (stss_index + 1 < sc->keyframe_count)
1563
                        stss_index++;
1564
                } else if (sc->stps_count && current_sample+key_off == sc->stps_data[stps_index]) {
1565
                    keyframe = 1;
1566
                    if (stps_index + 1 < sc->stps_count)
1567
                        stps_index++;
1568
                }
1569
                if (keyframe)
1570
                    distance = 0;
1571
                sample_size = sc->sample_size > 0 ? sc->sample_size : sc->sample_sizes[current_sample];
1572
                if(sc->pseudo_stream_id == -1 ||
1573
                   sc->stsc_data[stsc_index].id - 1 == sc->pseudo_stream_id) {
1574
                    AVIndexEntry *e = &st->index_entries[st->nb_index_entries++];
1575
                    e->pos = current_offset;
1576
                    e->timestamp = current_dts;
1577
                    e->size = sample_size;
1578
                    e->min_distance = distance;
1579
                    e->flags = keyframe ? AVINDEX_KEYFRAME : 0;
1580
                    dprintf(mov->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
1581
                            "size %d, distance %d, keyframe %d\n", st->index, current_sample,
1582
                            current_offset, current_dts, sample_size, distance, keyframe);
1583
                }
1584

    
1585
                current_offset += sample_size;
1586
                stream_size += sample_size;
1587
                current_dts += sc->stts_data[stts_index].duration;
1588
                distance++;
1589
                stts_sample++;
1590
                current_sample++;
1591
                if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
1592
                    stts_sample = 0;
1593
                    stts_index++;
1594
                }
1595
            }
1596
        }
1597
        if (st->duration > 0)
1598
            st->codec->bit_rate = stream_size*8*sc->time_scale/st->duration;
1599
    } else {
1600
        unsigned chunk_samples, total = 0;
1601

    
1602
        // compute total chunk count
1603
        for (i = 0; i < sc->stsc_count; i++) {
1604
            unsigned count, chunk_count;
1605

    
1606
            chunk_samples = sc->stsc_data[i].count;
1607
            if (sc->samples_per_frame && chunk_samples % sc->samples_per_frame) {
1608
                av_log(mov->fc, AV_LOG_ERROR, "error unaligned chunk\n");
1609
                return;
1610
            }
1611

    
1612
            if (sc->samples_per_frame >= 160) { // gsm
1613
                count = chunk_samples / sc->samples_per_frame;
1614
            } else if (sc->samples_per_frame > 1) {
1615
                unsigned samples = (1024/sc->samples_per_frame)*sc->samples_per_frame;
1616
                count = (chunk_samples+samples-1) / samples;
1617
            } else {
1618
                count = (chunk_samples+1023) / 1024;
1619
            }
1620

    
1621
            if (i < sc->stsc_count - 1)
1622
                chunk_count = sc->stsc_data[i+1].first - sc->stsc_data[i].first;
1623
            else
1624
                chunk_count = sc->chunk_count - (sc->stsc_data[i].first - 1);
1625
            total += chunk_count * count;
1626
        }
1627

    
1628
        dprintf(mov->fc, "chunk count %d\n", total);
1629
        if (total >= UINT_MAX / sizeof(*st->index_entries))
1630
            return;
1631
        st->index_entries = av_malloc(total*sizeof(*st->index_entries));
1632
        if (!st->index_entries)
1633
            return;
1634
        st->index_entries_allocated_size = total*sizeof(*st->index_entries);
1635

    
1636
        // populate index
1637
        for (i = 0; i < sc->chunk_count; i++) {
1638
            current_offset = sc->chunk_offsets[i];
1639
            if (stsc_index + 1 < sc->stsc_count &&
1640
                i + 1 == sc->stsc_data[stsc_index + 1].first)
1641
                stsc_index++;
1642
            chunk_samples = sc->stsc_data[stsc_index].count;
1643

    
1644
            while (chunk_samples > 0) {
1645
                AVIndexEntry *e;
1646
                unsigned size, samples;
1647

    
1648
                if (sc->samples_per_frame >= 160) { // gsm
1649
                    samples = sc->samples_per_frame;
1650
                    size = sc->bytes_per_frame;
1651
                } else {
1652
                    if (sc->samples_per_frame > 1) {
1653
                        samples = FFMIN((1024 / sc->samples_per_frame)*
1654
                                        sc->samples_per_frame, chunk_samples);
1655
                        size = (samples / sc->samples_per_frame) * sc->bytes_per_frame;
1656
                    } else {
1657
                        samples = FFMIN(1024, chunk_samples);
1658
                        size = samples * sc->sample_size;
1659
                    }
1660
                }
1661

    
1662
                if (st->nb_index_entries >= total) {
1663
                    av_log(mov->fc, AV_LOG_ERROR, "wrong chunk count %d\n", total);
1664
                    return;
1665
                }
1666
                e = &st->index_entries[st->nb_index_entries++];
1667
                e->pos = current_offset;
1668
                e->timestamp = current_dts;
1669
                e->size = size;
1670
                e->min_distance = 0;
1671
                e->flags = AVINDEX_KEYFRAME;
1672
                dprintf(mov->fc, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", "
1673
                        "size %d, duration %d\n", st->index, i, current_offset, current_dts,
1674
                        size, samples);
1675

    
1676
                current_offset += size;
1677
                current_dts += samples;
1678
                chunk_samples -= samples;
1679
            }
1680
        }
1681
    }
1682
}
1683

    
1684
static int mov_open_dref(ByteIOContext **pb, char *src, MOVDref *ref)
1685
{
1686
    /* try relative path, we do not try the absolute because it can leak information about our
1687
       system to an attacker */
1688
    if (ref->nlvl_to > 0 && ref->nlvl_from > 0) {
1689
        char filename[1024];
1690
        char *src_path;
1691
        int i, l;
1692

    
1693
        /* find a source dir */
1694
        src_path = strrchr(src, '/');
1695
        if (src_path)
1696
            src_path++;
1697
        else
1698
            src_path = src;
1699

    
1700
        /* find a next level down to target */
1701
        for (i = 0, l = strlen(ref->path) - 1; l >= 0; l--)
1702
            if (ref->path[l] == '/') {
1703
                if (i == ref->nlvl_to - 1)
1704
                    break;
1705
                else
1706
                    i++;
1707
            }
1708

    
1709
        /* compose filename if next level down to target was found */
1710
        if (i == ref->nlvl_to - 1 && src_path - src  < sizeof(filename)) {
1711
            memcpy(filename, src, src_path - src);
1712
            filename[src_path - src] = 0;
1713

    
1714
            for (i = 1; i < ref->nlvl_from; i++)
1715
                av_strlcat(filename, "../", 1024);
1716

    
1717
            av_strlcat(filename, ref->path + l + 1, 1024);
1718

    
1719
            if (!url_fopen(pb, filename, URL_RDONLY))
1720
                return 0;
1721
        }
1722
    }
1723

    
1724
    return AVERROR(ENOENT);
1725
};
1726

    
1727
static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1728
{
1729
    AVStream *st;
1730
    MOVStreamContext *sc;
1731
    int ret;
1732

    
1733
    st = av_new_stream(c->fc, c->fc->nb_streams);
1734
    if (!st) return AVERROR(ENOMEM);
1735
    sc = av_mallocz(sizeof(MOVStreamContext));
1736
    if (!sc) return AVERROR(ENOMEM);
1737

    
1738
    st->priv_data = sc;
1739
    st->codec->codec_type = AVMEDIA_TYPE_DATA;
1740
    sc->ffindex = st->index;
1741

    
1742
    if ((ret = mov_read_default(c, pb, atom)) < 0)
1743
        return ret;
1744

    
1745
    /* sanity checks */
1746
    if (sc->chunk_count && (!sc->stts_count || !sc->stsc_count ||
1747
                            (!sc->sample_size && !sc->sample_count))) {
1748
        av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
1749
               st->index);
1750
        return 0;
1751
    }
1752

    
1753
    if (sc->time_scale <= 0) {
1754
        av_log(c->fc, AV_LOG_WARNING, "stream %d, timescale not set\n", st->index);
1755
        sc->time_scale = c->time_scale;
1756
        if (sc->time_scale <= 0)
1757
            sc->time_scale = 1;
1758
    }
1759

    
1760
    av_set_pts_info(st, 64, 1, sc->time_scale);
1761

    
1762
    if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
1763
        !st->codec->frame_size && sc->stts_count == 1) {
1764
        st->codec->frame_size = av_rescale(sc->stts_data[0].duration,
1765
                                           st->codec->sample_rate, sc->time_scale);
1766
        dprintf(c->fc, "frame size %d\n", st->codec->frame_size);
1767
    }
1768

    
1769
    mov_build_index(c, st);
1770

    
1771
    if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
1772
        MOVDref *dref = &sc->drefs[sc->dref_id - 1];
1773
        if (mov_open_dref(&sc->pb, c->fc->filename, dref) < 0)
1774
            av_log(c->fc, AV_LOG_ERROR,
1775
                   "stream %d, error opening alias: path='%s', dir='%s', "
1776
                   "filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d\n",
1777
                   st->index, dref->path, dref->dir, dref->filename,
1778
                   dref->volume, dref->nlvl_from, dref->nlvl_to);
1779
    } else
1780
        sc->pb = c->fc->pb;
1781

    
1782
    if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1783
        if (!st->sample_aspect_ratio.num &&
1784
            (st->codec->width != sc->width || st->codec->height != sc->height)) {
1785
            st->sample_aspect_ratio = av_d2q(((double)st->codec->height * sc->width) /
1786
                                             ((double)st->codec->width * sc->height), INT_MAX);
1787
        }
1788

    
1789
        av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
1790
                  sc->time_scale*st->nb_frames, st->duration, INT_MAX);
1791

    
1792
        if (sc->stts_count == 1 || (sc->stts_count == 2 && sc->stts_data[1].count == 1))
1793
            av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den,
1794
                      sc->time_scale, sc->stts_data[0].duration, INT_MAX);
1795
    }
1796

    
1797
    switch (st->codec->codec_id) {
1798
#if CONFIG_H261_DECODER
1799
    case CODEC_ID_H261:
1800
#endif
1801
#if CONFIG_H263_DECODER
1802
    case CODEC_ID_H263:
1803
#endif
1804
#if CONFIG_H264_DECODER
1805
    case CODEC_ID_H264:
1806
#endif
1807
#if CONFIG_MPEG4_DECODER
1808
    case CODEC_ID_MPEG4:
1809
#endif
1810
        st->codec->width = 0; /* let decoder init width/height */
1811
        st->codec->height= 0;
1812
        break;
1813
    }
1814

    
1815
    /* Do not need those anymore. */
1816
    av_freep(&sc->chunk_offsets);
1817
    av_freep(&sc->stsc_data);
1818
    av_freep(&sc->sample_sizes);
1819
    av_freep(&sc->keyframes);
1820
    av_freep(&sc->stts_data);
1821
    av_freep(&sc->stps_data);
1822

    
1823
    return 0;
1824
}
1825

    
1826
static int mov_read_ilst(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1827
{
1828
    int ret;
1829
    c->itunes_metadata = 1;
1830
    ret = mov_read_default(c, pb, atom);
1831
    c->itunes_metadata = 0;
1832
    return ret;
1833
}
1834

    
1835
static int mov_read_meta(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1836
{
1837
    while (atom.size > 8) {
1838
        uint32_t tag = get_le32(pb);
1839
        atom.size -= 4;
1840
        if (tag == MKTAG('h','d','l','r')) {
1841
            url_fseek(pb, -8, SEEK_CUR);
1842
            atom.size += 8;
1843
            return mov_read_default(c, pb, atom);
1844
        }
1845
    }
1846
    return 0;
1847
}
1848

    
1849
static int mov_read_tkhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1850
{
1851
    int i;
1852
    int width;
1853
    int height;
1854
    int64_t disp_transform[2];
1855
    int display_matrix[3][2];
1856
    AVStream *st;
1857
    MOVStreamContext *sc;
1858
    int version;
1859

    
1860
    if (c->fc->nb_streams < 1)
1861
        return 0;
1862
    st = c->fc->streams[c->fc->nb_streams-1];
1863
    sc = st->priv_data;
1864

    
1865
    version = get_byte(pb);
1866
    get_be24(pb); /* flags */
1867
    /*
1868
    MOV_TRACK_ENABLED 0x0001
1869
    MOV_TRACK_IN_MOVIE 0x0002
1870
    MOV_TRACK_IN_PREVIEW 0x0004
1871
    MOV_TRACK_IN_POSTER 0x0008
1872
    */
1873

    
1874
    if (version == 1) {
1875
        get_be64(pb);
1876
        get_be64(pb);
1877
    } else {
1878
        get_be32(pb); /* creation time */
1879
        get_be32(pb); /* modification time */
1880
    }
1881
    st->id = (int)get_be32(pb); /* track id (NOT 0 !)*/
1882
    get_be32(pb); /* reserved */
1883

    
1884
    /* highlevel (considering edits) duration in movie timebase */
1885
    (version == 1) ? get_be64(pb) : get_be32(pb);
1886
    get_be32(pb); /* reserved */
1887
    get_be32(pb); /* reserved */
1888

    
1889
    get_be16(pb); /* layer */
1890
    get_be16(pb); /* alternate group */
1891
    get_be16(pb); /* volume */
1892
    get_be16(pb); /* reserved */
1893

    
1894
    //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
1895
    // they're kept in fixed point format through all calculations
1896
    // ignore u,v,z b/c we don't need the scale factor to calc aspect ratio
1897
    for (i = 0; i < 3; i++) {
1898
        display_matrix[i][0] = get_be32(pb);   // 16.16 fixed point
1899
        display_matrix[i][1] = get_be32(pb);   // 16.16 fixed point
1900
        get_be32(pb);           // 2.30 fixed point (not used)
1901
    }
1902

    
1903
    width = get_be32(pb);       // 16.16 fixed point track width
1904
    height = get_be32(pb);      // 16.16 fixed point track height
1905
    sc->width = width >> 16;
1906
    sc->height = height >> 16;
1907

    
1908
    // transform the display width/height according to the matrix
1909
    // skip this if the display matrix is the default identity matrix
1910
    // or if it is rotating the picture, ex iPhone 3GS
1911
    // to keep the same scale, use [width height 1<<16]
1912
    if (width && height &&
1913
        ((display_matrix[0][0] != 65536  ||
1914
          display_matrix[1][1] != 65536) &&
1915
         !display_matrix[0][1] &&
1916
         !display_matrix[1][0] &&
1917
         !display_matrix[2][0] && !display_matrix[2][1])) {
1918
        for (i = 0; i < 2; i++)
1919
            disp_transform[i] =
1920
                (int64_t)  width  * display_matrix[0][i] +
1921
                (int64_t)  height * display_matrix[1][i] +
1922
                ((int64_t) display_matrix[2][i] << 16);
1923

    
1924
        //sample aspect ratio is new width/height divided by old width/height
1925
        st->sample_aspect_ratio = av_d2q(
1926
            ((double) disp_transform[0] * height) /
1927
            ((double) disp_transform[1] * width), INT_MAX);
1928
    }
1929
    return 0;
1930
}
1931

    
1932
static int mov_read_tfhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1933
{
1934
    MOVFragment *frag = &c->fragment;
1935
    MOVTrackExt *trex = NULL;
1936
    int flags, track_id, i;
1937

    
1938
    get_byte(pb); /* version */
1939
    flags = get_be24(pb);
1940

    
1941
    track_id = get_be32(pb);
1942
    if (!track_id)
1943
        return -1;
1944
    frag->track_id = track_id;
1945
    for (i = 0; i < c->trex_count; i++)
1946
        if (c->trex_data[i].track_id == frag->track_id) {
1947
            trex = &c->trex_data[i];
1948
            break;
1949
        }
1950
    if (!trex) {
1951
        av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
1952
        return -1;
1953
    }
1954

    
1955
    if (flags & 0x01) frag->base_data_offset = get_be64(pb);
1956
    else              frag->base_data_offset = frag->moof_offset;
1957
    if (flags & 0x02) frag->stsd_id          = get_be32(pb);
1958
    else              frag->stsd_id          = trex->stsd_id;
1959

    
1960
    frag->duration = flags & 0x08 ? get_be32(pb) : trex->duration;
1961
    frag->size     = flags & 0x10 ? get_be32(pb) : trex->size;
1962
    frag->flags    = flags & 0x20 ? get_be32(pb) : trex->flags;
1963
    dprintf(c->fc, "frag flags 0x%x\n", frag->flags);
1964
    return 0;
1965
}
1966

    
1967
static int mov_read_chap(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1968
{
1969
    c->chapter_track = get_be32(pb);
1970
    return 0;
1971
}
1972

    
1973
static int mov_read_trex(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1974
{
1975
    MOVTrackExt *trex;
1976

    
1977
    if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
1978
        return -1;
1979
    trex = av_realloc(c->trex_data, (c->trex_count+1)*sizeof(*c->trex_data));
1980
    if (!trex)
1981
        return AVERROR(ENOMEM);
1982
    c->trex_data = trex;
1983
    trex = &c->trex_data[c->trex_count++];
1984
    get_byte(pb); /* version */
1985
    get_be24(pb); /* flags */
1986
    trex->track_id = get_be32(pb);
1987
    trex->stsd_id  = get_be32(pb);
1988
    trex->duration = get_be32(pb);
1989
    trex->size     = get_be32(pb);
1990
    trex->flags    = get_be32(pb);
1991
    return 0;
1992
}
1993

    
1994
static int mov_read_trun(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1995
{
1996
    MOVFragment *frag = &c->fragment;
1997
    AVStream *st = NULL;
1998
    MOVStreamContext *sc;
1999
    uint64_t offset;
2000
    int64_t dts;
2001
    int data_offset = 0;
2002
    unsigned entries, first_sample_flags = frag->flags;
2003
    int flags, distance, i;
2004

    
2005
    for (i = 0; i < c->fc->nb_streams; i++) {
2006
        if (c->fc->streams[i]->id == frag->track_id) {
2007
            st = c->fc->streams[i];
2008
            break;
2009
        }
2010
    }
2011
    if (!st) {
2012
        av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %d\n", frag->track_id);
2013
        return -1;
2014
    }
2015
    sc = st->priv_data;
2016
    if (sc->pseudo_stream_id+1 != frag->stsd_id)
2017
        return 0;
2018
    get_byte(pb); /* version */
2019
    flags = get_be24(pb);
2020
    entries = get_be32(pb);
2021
    dprintf(c->fc, "flags 0x%x entries %d\n", flags, entries);
2022
    if (flags & 0x001) data_offset        = get_be32(pb);
2023
    if (flags & 0x004) first_sample_flags = get_be32(pb);
2024
    if (flags & 0x800) {
2025
        MOVStts *ctts_data;
2026
        if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
2027
            return -1;
2028
        ctts_data = av_realloc(sc->ctts_data,
2029
                               (entries+sc->ctts_count)*sizeof(*sc->ctts_data));
2030
        if (!ctts_data)
2031
            return AVERROR(ENOMEM);
2032
        sc->ctts_data = ctts_data;
2033
    }
2034
    dts = st->duration;
2035
    offset = frag->base_data_offset + data_offset;
2036
    distance = 0;
2037
    dprintf(c->fc, "first sample flags 0x%x\n", first_sample_flags);
2038
    for (i = 0; i < entries; i++) {
2039
        unsigned sample_size = frag->size;
2040
        int sample_flags = i ? frag->flags : first_sample_flags;
2041
        unsigned sample_duration = frag->duration;
2042
        int keyframe;
2043

    
2044
        if (flags & 0x100) sample_duration = get_be32(pb);
2045
        if (flags & 0x200) sample_size     = get_be32(pb);
2046
        if (flags & 0x400) sample_flags    = get_be32(pb);
2047
        if (flags & 0x800) {
2048
            sc->ctts_data[sc->ctts_count].count = 1;
2049
            sc->ctts_data[sc->ctts_count].duration = get_be32(pb);
2050
            sc->ctts_count++;
2051
        }
2052
        if ((keyframe = st->codec->codec_type == AVMEDIA_TYPE_AUDIO ||
2053
             (flags & 0x004 && !i && !sample_flags) || sample_flags & 0x2000000))
2054
            distance = 0;
2055
        av_add_index_entry(st, offset, dts, sample_size, distance,
2056
                           keyframe ? AVINDEX_KEYFRAME : 0);
2057
        dprintf(c->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
2058
                "size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
2059
                offset, dts, sample_size, distance, keyframe);
2060
        distance++;
2061
        dts += sample_duration;
2062
        offset += sample_size;
2063
    }
2064
    frag->moof_offset = offset;
2065
    st->duration = dts;
2066
    return 0;
2067
}
2068

    
2069
/* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
2070
/* like the files created with Adobe Premiere 5.0, for samples see */
2071
/* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
2072
static int mov_read_wide(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
2073
{
2074
    int err;
2075

    
2076
    if (atom.size < 8)
2077
        return 0; /* continue */
2078
    if (get_be32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
2079
        url_fskip(pb, atom.size - 4);
2080
        return 0;
2081
    }
2082
    atom.type = get_le32(pb);
2083
    atom.size -= 8;
2084
    if (atom.type != MKTAG('m','d','a','t')) {
2085
        url_fskip(pb, atom.size);
2086
        return 0;
2087
    }
2088
    err = mov_read_mdat(c, pb, atom);
2089
    return err;
2090
}
2091

    
2092
static int mov_read_cmov(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
2093
{
2094
#if CONFIG_ZLIB
2095
    ByteIOContext ctx;
2096
    uint8_t *cmov_data;
2097
    uint8_t *moov_data; /* uncompressed data */
2098
    long cmov_len, moov_len;
2099
    int ret = -1;
2100

    
2101
    get_be32(pb); /* dcom atom */
2102
    if (get_le32(pb) != MKTAG('d','c','o','m'))
2103
        return -1;
2104
    if (get_le32(pb) != MKTAG('z','l','i','b')) {
2105
        av_log(c->fc, AV_LOG_ERROR, "unknown compression for cmov atom !");
2106
        return -1;
2107
    }
2108
    get_be32(pb); /* cmvd atom */
2109
    if (get_le32(pb) != MKTAG('c','m','v','d'))
2110
        return -1;
2111
    moov_len = get_be32(pb); /* uncompressed size */
2112
    cmov_len = atom.size - 6 * 4;
2113

    
2114
    cmov_data = av_malloc(cmov_len);
2115
    if (!cmov_data)
2116
        return AVERROR(ENOMEM);
2117
    moov_data = av_malloc(moov_len);
2118
    if (!moov_data) {
2119
        av_free(cmov_data);
2120
        return AVERROR(ENOMEM);
2121
    }
2122
    get_buffer(pb, cmov_data, cmov_len);
2123
    if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
2124
        goto free_and_return;
2125
    if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
2126
        goto free_and_return;
2127
    atom.type = MKTAG('m','o','o','v');
2128
    atom.size = moov_len;
2129
#ifdef DEBUG
2130
//    { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }
2131
#endif
2132
    ret = mov_read_default(c, &ctx, atom);
2133
free_and_return:
2134
    av_free(moov_data);
2135
    av_free(cmov_data);
2136
    return ret;
2137
#else
2138
    av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
2139
    return -1;
2140
#endif
2141
}
2142

    
2143
/* edit list atom */
2144
static int mov_read_elst(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
2145
{
2146
    MOVStreamContext *sc;
2147
    int i, edit_count;
2148

    
2149
    if (c->fc->nb_streams < 1)
2150
        return 0;
2151
    sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
2152

    
2153
    get_byte(pb); /* version */
2154
    get_be24(pb); /* flags */
2155
    edit_count = get_be32(pb); /* entries */
2156

    
2157
    if((uint64_t)edit_count*12+8 > atom.size)
2158
        return -1;
2159

    
2160
    for(i=0; i<edit_count; i++){
2161
        int time;
2162
        int duration = get_be32(pb); /* Track duration */
2163
        time = get_be32(pb); /* Media time */
2164
        get_be32(pb); /* Media rate */
2165
        if (i == 0 && time >= -1) {
2166
            sc->time_offset = time != -1 ? time : -duration;
2167
        }
2168
    }
2169

    
2170
    if(edit_count > 1)
2171
        av_log(c->fc, AV_LOG_WARNING, "multiple edit list entries, "
2172
               "a/v desync might occur, patch welcome\n");
2173

    
2174
    dprintf(c->fc, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, edit_count);
2175
    return 0;
2176
}
2177

    
2178
static const MOVParseTableEntry mov_default_parse_table[] = {
2179
{ MKTAG('a','v','s','s'), mov_read_extradata },
2180
{ MKTAG('c','h','p','l'), mov_read_chpl },
2181
{ MKTAG('c','o','6','4'), mov_read_stco },
2182
{ MKTAG('c','t','t','s'), mov_read_ctts }, /* composition time to sample */
2183
{ MKTAG('d','i','n','f'), mov_read_default },
2184
{ MKTAG('d','r','e','f'), mov_read_dref },
2185
{ MKTAG('e','d','t','s'), mov_read_default },
2186
{ MKTAG('e','l','s','t'), mov_read_elst },
2187
{ MKTAG('e','n','d','a'), mov_read_enda },
2188
{ MKTAG('f','i','e','l'), mov_read_extradata },
2189
{ MKTAG('f','t','y','p'), mov_read_ftyp },
2190
{ MKTAG('g','l','b','l'), mov_read_glbl },
2191
{ MKTAG('h','d','l','r'), mov_read_hdlr },
2192
{ MKTAG('i','l','s','t'), mov_read_ilst },
2193
{ MKTAG('j','p','2','h'), mov_read_extradata },
2194
{ MKTAG('m','d','a','t'), mov_read_mdat },
2195
{ MKTAG('m','d','h','d'), mov_read_mdhd },
2196
{ MKTAG('m','d','i','a'), mov_read_default },
2197
{ MKTAG('m','e','t','a'), mov_read_meta },
2198
{ MKTAG('m','i','n','f'), mov_read_default },
2199
{ MKTAG('m','o','o','f'), mov_read_moof },
2200
{ MKTAG('m','o','o','v'), mov_read_moov },
2201
{ MKTAG('m','v','e','x'), mov_read_default },
2202
{ MKTAG('m','v','h','d'), mov_read_mvhd },
2203
{ MKTAG('S','M','I',' '), mov_read_smi }, /* Sorenson extension ??? */
2204
{ MKTAG('a','l','a','c'), mov_read_extradata }, /* alac specific atom */
2205
{ MKTAG('a','v','c','C'), mov_read_glbl },
2206
{ MKTAG('p','a','s','p'), mov_read_pasp },
2207
{ MKTAG('s','t','b','l'), mov_read_default },
2208
{ MKTAG('s','t','c','o'), mov_read_stco },
2209
{ MKTAG('s','t','p','s'), mov_read_stps },
2210
{ MKTAG('s','t','r','f'), mov_read_strf },
2211
{ MKTAG('s','t','s','c'), mov_read_stsc },
2212
{ MKTAG('s','t','s','d'), mov_read_stsd }, /* sample description */
2213
{ MKTAG('s','t','s','s'), mov_read_stss }, /* sync sample */
2214
{ MKTAG('s','t','s','z'), mov_read_stsz }, /* sample size */
2215
{ MKTAG('s','t','t','s'), mov_read_stts },
2216
{ MKTAG('s','t','z','2'), mov_read_stsz }, /* compact sample size */
2217
{ MKTAG('t','k','h','d'), mov_read_tkhd }, /* track header */
2218
{ MKTAG('t','f','h','d'), mov_read_tfhd }, /* track fragment header */
2219
{ MKTAG('t','r','a','k'), mov_read_trak },
2220
{ MKTAG('t','r','a','f'), mov_read_default },
2221
{ MKTAG('t','r','e','f'), mov_read_default },
2222
{ MKTAG('c','h','a','p'), mov_read_chap },
2223
{ MKTAG('t','r','e','x'), mov_read_trex },
2224
{ MKTAG('t','r','u','n'), mov_read_trun },
2225
{ MKTAG('u','d','t','a'), mov_read_default },
2226
{ MKTAG('w','a','v','e'), mov_read_wave },
2227
{ MKTAG('e','s','d','s'), mov_read_esds },
2228
{ MKTAG('d','a','c','3'), mov_read_dac3 }, /* AC-3 info */
2229
{ MKTAG('w','i','d','e'), mov_read_wide }, /* place holder */
2230
{ MKTAG('c','m','o','v'), mov_read_cmov },
2231
{ 0, NULL }
2232
};
2233

    
2234
static int mov_probe(AVProbeData *p)
2235
{
2236
    unsigned int offset;
2237
    uint32_t tag;
2238
    int score = 0;
2239

    
2240
    /* check file header */
2241
    offset = 0;
2242
    for(;;) {
2243
        /* ignore invalid offset */
2244
        if ((offset + 8) > (unsigned int)p->buf_size)
2245
            return score;
2246
        tag = AV_RL32(p->buf + offset + 4);
2247
        switch(tag) {
2248
        /* check for obvious tags */
2249
        case MKTAG('j','P',' ',' '): /* jpeg 2000 signature */
2250
        case MKTAG('m','o','o','v'):
2251
        case MKTAG('m','d','a','t'):
2252
        case MKTAG('p','n','o','t'): /* detect movs with preview pics like ew.mov and april.mov */
2253
        case MKTAG('u','d','t','a'): /* Packet Video PVAuthor adds this and a lot of more junk */
2254
        case MKTAG('f','t','y','p'):
2255
            return AVPROBE_SCORE_MAX;
2256
        /* those are more common words, so rate then a bit less */
2257
        case MKTAG('e','d','i','w'): /* xdcam files have reverted first tags */
2258
        case MKTAG('w','i','d','e'):
2259
        case MKTAG('f','r','e','e'):
2260
        case MKTAG('j','u','n','k'):
2261
        case MKTAG('p','i','c','t'):
2262
            return AVPROBE_SCORE_MAX - 5;
2263
        case MKTAG(0x82,0x82,0x7f,0x7d):
2264
        case MKTAG('s','k','i','p'):
2265
        case MKTAG('u','u','i','d'):
2266
        case MKTAG('p','r','f','l'):
2267
            offset = AV_RB32(p->buf+offset) + offset;
2268
            /* if we only find those cause probedata is too small at least rate them */
2269
            score = AVPROBE_SCORE_MAX - 50;
2270
            break;
2271
        default:
2272
            /* unrecognized tag */
2273
            return score;
2274
        }
2275
    }
2276
    return score;
2277
}
2278

    
2279
// must be done after parsing all trak because there's no order requirement
2280
static void mov_read_chapters(AVFormatContext *s)
2281
{
2282
    MOVContext *mov = s->priv_data;
2283
    AVStream *st = NULL;
2284
    MOVStreamContext *sc;
2285
    int64_t cur_pos;
2286
    uint8_t *title = NULL;
2287
    int i, len, i8, i16;
2288

    
2289
    for (i = 0; i < s->nb_streams; i++)
2290
        if (s->streams[i]->id == mov->chapter_track) {
2291
            st = s->streams[i];
2292
            break;
2293
        }
2294
    if (!st) {
2295
        av_log(s, AV_LOG_ERROR, "Referenced QT chapter track not found\n");
2296
        return;
2297
    }
2298

    
2299
    st->discard = AVDISCARD_ALL;
2300
    sc = st->priv_data;
2301
    cur_pos = url_ftell(sc->pb);
2302

    
2303
    for (i = 0; i < st->nb_index_entries; i++) {
2304
        AVIndexEntry *sample = &st->index_entries[i];
2305
        int64_t end = i+1 < st->nb_index_entries ? st->index_entries[i+1].timestamp : st->duration;
2306

    
2307
        if (url_fseek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
2308
            av_log(s, AV_LOG_ERROR, "Chapter %d not found in file\n", i);
2309
            goto finish;
2310
        }
2311

    
2312
        title = av_malloc(sample->size+2);
2313
        get_buffer(sc->pb, title, sample->size);
2314

    
2315
        // the first two bytes are the length of the title
2316
        len = AV_RB16(title);
2317
        if (len > sample->size-2)
2318
            continue;
2319

    
2320
        // The samples could theoretically be in any encoding if there's an encd
2321
        // atom following, but in practice are only utf-8 or utf-16, distinguished
2322
        // instead by the presence of a BOM
2323
        if (AV_RB16(title+2) == 0xfeff) {
2324
            uint8_t *utf8 = av_malloc(2*len+3);
2325

    
2326
            i8 = i16 = 0;
2327
            while (i16 < len) {
2328
                uint32_t ch;
2329
                uint8_t tmp;
2330
                GET_UTF16(ch, i16 < len ? AV_RB16(title + (i16+=2)) : 0, break;)
2331
                PUT_UTF8(ch, tmp, if (i8 < 2*len) utf8[2+i8++] = tmp;)
2332
            }
2333
            utf8[2+i8] = 0;
2334
            av_freep(&title);
2335
            title = utf8;
2336
        }
2337

    
2338
        ff_new_chapter(s, i, st->time_base, sample->timestamp, end, title+2);
2339
        av_freep(&title);
2340
    }
2341
finish:
2342
    av_free(title);
2343
    url_fseek(sc->pb, cur_pos, SEEK_SET);
2344
}
2345

    
2346
static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)
2347
{
2348
    MOVContext *mov = s->priv_data;
2349
    ByteIOContext *pb = s->pb;
2350
    int err;
2351
    MOVAtom atom = { AV_RL32("root") };
2352

    
2353
    mov->fc = s;
2354
    /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
2355
    if(!url_is_streamed(pb))
2356
        atom.size = url_fsize(pb);
2357
    else
2358
        atom.size = INT64_MAX;
2359

    
2360
    /* check MOV header */
2361
    if ((err = mov_read_default(mov, pb, atom)) < 0) {
2362
        av_log(s, AV_LOG_ERROR, "error reading header: %d\n", err);
2363
        return err;
2364
    }
2365
    if (!mov->found_moov) {
2366
        av_log(s, AV_LOG_ERROR, "moov atom not found\n");
2367
        return -1;
2368
    }
2369
    dprintf(mov->fc, "on_parse_exit_offset=%lld\n", url_ftell(pb));
2370

    
2371
    if (!url_is_streamed(pb) && mov->chapter_track > 0)
2372
        mov_read_chapters(s);
2373

    
2374
    return 0;
2375
}
2376

    
2377
static AVIndexEntry *mov_find_next_sample(AVFormatContext *s, AVStream **st)
2378
{
2379
    AVIndexEntry *sample = NULL;
2380
    int64_t best_dts = INT64_MAX;
2381
    int i;
2382
    for (i = 0; i < s->nb_streams; i++) {
2383
        AVStream *avst = s->streams[i];
2384
        MOVStreamContext *msc = avst->priv_data;
2385
        if (msc->pb && msc->current_sample < avst->nb_index_entries) {
2386
            AVIndexEntry *current_sample = &avst->index_entries[msc->current_sample];
2387
            int64_t dts = av_rescale(current_sample->timestamp, AV_TIME_BASE, msc->time_scale);
2388
            dprintf(s, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts);
2389
            if (!sample || (url_is_streamed(s->pb) && current_sample->pos < sample->pos) ||
2390
                (!url_is_streamed(s->pb) &&
2391
                 ((msc->pb != s->pb && dts < best_dts) || (msc->pb == s->pb &&
2392
                 ((FFABS(best_dts - dts) <= AV_TIME_BASE && current_sample->pos < sample->pos) ||
2393
                  (FFABS(best_dts - dts) > AV_TIME_BASE && dts < best_dts)))))) {
2394
                sample = current_sample;
2395
                best_dts = dts;
2396
                *st = avst;
2397
            }
2398
        }
2399
    }
2400
    return sample;
2401
}
2402

    
2403
static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
2404
{
2405
    MOVContext *mov = s->priv_data;
2406
    MOVStreamContext *sc;
2407
    AVIndexEntry *sample;
2408
    AVStream *st = NULL;
2409
    int ret;
2410
 retry:
2411
    sample = mov_find_next_sample(s, &st);
2412
    if (!sample) {
2413
        mov->found_mdat = 0;
2414
        if (!url_is_streamed(s->pb) ||
2415
            mov_read_default(mov, s->pb, (MOVAtom){ AV_RL32("root"), INT64_MAX }) < 0 ||
2416
            url_feof(s->pb))
2417
            return AVERROR_EOF;
2418
        dprintf(s, "read fragments, offset 0x%llx\n", url_ftell(s->pb));
2419
        goto retry;
2420
    }
2421
    sc = st->priv_data;
2422
    /* must be done just before reading, to avoid infinite loop on sample */
2423
    sc->current_sample++;
2424

    
2425
    if (st->discard != AVDISCARD_ALL) {
2426
        if (url_fseek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
2427
            av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n",
2428
                   sc->ffindex, sample->pos);
2429
            return -1;
2430
        }
2431
        ret = av_get_packet(sc->pb, pkt, sample->size);
2432
        if (ret < 0)
2433
            return ret;
2434
#if CONFIG_DV_DEMUXER
2435
        if (mov->dv_demux && sc->dv_audio_container) {
2436
            dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size);
2437
            av_free(pkt->data);
2438
            pkt->size = 0;
2439
            ret = dv_get_packet(mov->dv_demux, pkt);
2440
            if (ret < 0)
2441
                return ret;
2442
        }
2443
#endif
2444
    }
2445

    
2446
    pkt->stream_index = sc->ffindex;
2447
    pkt->dts = sample->timestamp;
2448
    if (sc->ctts_data) {
2449
        pkt->pts = pkt->dts + sc->dts_shift + sc->ctts_data[sc->ctts_index].duration;
2450
        /* update ctts context */
2451
        sc->ctts_sample++;
2452
        if (sc->ctts_index < sc->ctts_count &&
2453
            sc->ctts_data[sc->ctts_index].count == sc->ctts_sample) {
2454
            sc->ctts_index++;
2455
            sc->ctts_sample = 0;
2456
        }
2457
        if (sc->wrong_dts)
2458
            pkt->dts = AV_NOPTS_VALUE;
2459
    } else {
2460
        int64_t next_dts = (sc->current_sample < st->nb_index_entries) ?
2461
            st->index_entries[sc->current_sample].timestamp : st->duration;
2462
        pkt->duration = next_dts - pkt->dts;
2463
        pkt->pts = pkt->dts;
2464
    }
2465
    if (st->discard == AVDISCARD_ALL)
2466
        goto retry;
2467
    pkt->flags |= sample->flags & AVINDEX_KEYFRAME ? AV_PKT_FLAG_KEY : 0;
2468
    pkt->pos = sample->pos;
2469
    dprintf(s, "stream %d, pts %"PRId64", dts %"PRId64", pos 0x%"PRIx64", duration %d\n",
2470
            pkt->stream_index, pkt->pts, pkt->dts, pkt->pos, pkt->duration);
2471
    return 0;
2472
}
2473

    
2474
static int mov_seek_stream(AVFormatContext *s, AVStream *st, int64_t timestamp, int flags)
2475
{
2476
    MOVStreamContext *sc = st->priv_data;
2477
    int sample, time_sample;
2478
    int i;
2479

    
2480
    sample = av_index_search_timestamp(st, timestamp, flags);
2481
    dprintf(s, "stream %d, timestamp %"PRId64", sample %d\n", st->index, timestamp, sample);
2482
    if (sample < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp)
2483
        sample = 0;
2484
    if (sample < 0) /* not sure what to do */
2485
        return -1;
2486
    sc->current_sample = sample;
2487
    dprintf(s, "stream %d, found sample %d\n", st->index, sc->current_sample);
2488
    /* adjust ctts index */
2489
    if (sc->ctts_data) {
2490
        time_sample = 0;
2491
        for (i = 0; i < sc->ctts_count; i++) {
2492
            int next = time_sample + sc->ctts_data[i].count;
2493
            if (next > sc->current_sample) {
2494
                sc->ctts_index = i;
2495
                sc->ctts_sample = sc->current_sample - time_sample;
2496
                break;
2497
            }
2498
            time_sample = next;
2499
        }
2500
    }
2501
    return sample;
2502
}
2503

    
2504
static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
2505
{
2506
    AVStream *st;
2507
    int64_t seek_timestamp, timestamp;
2508
    int sample;
2509
    int i;
2510

    
2511
    if (stream_index >= s->nb_streams)
2512
        return -1;
2513
    if (sample_time < 0)
2514
        sample_time = 0;
2515

    
2516
    st = s->streams[stream_index];
2517
    sample = mov_seek_stream(s, st, sample_time, flags);
2518
    if (sample < 0)
2519
        return -1;
2520

    
2521
    /* adjust seek timestamp to found sample timestamp */
2522
    seek_timestamp = st->index_entries[sample].timestamp;
2523

    
2524
    for (i = 0; i < s->nb_streams; i++) {
2525
        st = s->streams[i];
2526
        if (stream_index == i)
2527
            continue;
2528

    
2529
        timestamp = av_rescale_q(seek_timestamp, s->streams[stream_index]->time_base, st->time_base);
2530
        mov_seek_stream(s, st, timestamp, flags);
2531
    }
2532
    return 0;
2533
}
2534

    
2535
static int mov_read_close(AVFormatContext *s)
2536
{
2537
    MOVContext *mov = s->priv_data;
2538
    int i, j;
2539

    
2540
    for (i = 0; i < s->nb_streams; i++) {
2541
        AVStream *st = s->streams[i];
2542
        MOVStreamContext *sc = st->priv_data;
2543

    
2544
        av_freep(&sc->ctts_data);
2545
        for (j = 0; j < sc->drefs_count; j++) {
2546
            av_freep(&sc->drefs[j].path);
2547
            av_freep(&sc->drefs[j].dir);
2548
        }
2549
        av_freep(&sc->drefs);
2550
        if (sc->pb && sc->pb != s->pb)
2551
            url_fclose(sc->pb);
2552

    
2553
        av_freep(&st->codec->palctrl);
2554
    }
2555

    
2556
    if (mov->dv_demux) {
2557
        for(i = 0; i < mov->dv_fctx->nb_streams; i++) {
2558
            av_freep(&mov->dv_fctx->streams[i]->codec);
2559
            av_freep(&mov->dv_fctx->streams[i]);
2560
        }
2561
        av_freep(&mov->dv_fctx);
2562
        av_freep(&mov->dv_demux);
2563
    }
2564

    
2565
    av_freep(&mov->trex_data);
2566

    
2567
    return 0;
2568
}
2569

    
2570
AVInputFormat mov_demuxer = {
2571
    "mov,mp4,m4a,3gp,3g2,mj2",
2572
    NULL_IF_CONFIG_SMALL("QuickTime/MPEG-4/Motion JPEG 2000 format"),
2573
    sizeof(MOVContext),
2574
    mov_probe,
2575
    mov_read_header,
2576
    mov_read_packet,
2577
    mov_read_close,
2578
    mov_read_seek,
2579
};