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ffmpeg / libavformat / mov.c @ 380966a8

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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/mpeg4audio.h"
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#include "libavcodec/mpegaudiodata.h"
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#include "libavcodec/get_bits.h"
37

    
38
#if CONFIG_ZLIB
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#include <zlib.h>
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#endif
41

    
42
/*
43
 * First version by Francois Revol revol@free.fr
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 * Seek function by Gael Chardon gael.dev@4now.net
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 *
46
 * 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 :-)
50
 *
51
 * Funny I didn't know about http://sourceforge.net/projects/qt-ffmpeg/
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 * when coding this :) (it's a writer anyway)
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 *
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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 :))
60
 */
61

    
62
#include "qtpalette.h"
63

    
64

    
65
#undef NDEBUG
66
#include <assert.h>
67

    
68
/* XXX: it's the first time I make a recursive parser I think... sorry if it's ugly :P */
69

    
70
/* those functions parse an atom */
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/* return code:
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  0: continue to parse next atom
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 <0: error occurred, exit
74
*/
75
/* links atom IDs to parse functions */
76
typedef struct MOVParseTableEntry {
77
    uint32_t type;
78
    int (*parse)(MOVContext *ctx, ByteIOContext *pb, MOVAtom atom);
79
} MOVParseTableEntry;
80

    
81
static const MOVParseTableEntry mov_default_parse_table[];
82

    
83
static int mov_metadata_trkn(MOVContext *c, ByteIOContext *pb, unsigned len)
84
{
85
    char buf[16];
86

    
87
    get_be16(pb); // unknown
88
    snprintf(buf, sizeof(buf), "%d", get_be16(pb));
89
    av_metadata_set2(&c->fc->metadata, "track", buf, 0);
90

    
91
    get_be16(pb); // total tracks
92

    
93
    return 0;
94
}
95

    
96
static const uint32_t mac_to_unicode[128] = {
97
    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,
100
    0x00F2,0x00F4,0x00F6,0x00F5,0x00FA,0x00F9,0x00FB,0x00FC,
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    0x2020,0x00B0,0x00A2,0x00A3,0x00A7,0x2022,0x00B6,0x00DF,
102
    0x00AE,0x00A9,0x2122,0x00B4,0x00A8,0x2260,0x00C6,0x00D8,
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    0x221E,0x00B1,0x2264,0x2265,0x00A5,0x00B5,0x2202,0x2211,
104
    0x220F,0x03C0,0x222B,0x00AA,0x00BA,0x03A9,0x00E6,0x00F8,
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    0x00BF,0x00A1,0x00AC,0x221A,0x0192,0x2248,0x2206,0x00AB,
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    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,
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};
114

    
115
static int mov_read_mac_string(MOVContext *c, ByteIOContext *pb, int len,
116
                               char *dst, int dstlen)
117
{
118
    char *p = dst;
119
    char *end = dst+dstlen-1;
120
    int i;
121

    
122
    for (i = 0; i < len; i++) {
123
        uint8_t t, c = get_byte(pb);
124
        if (c < 0x80 && p < end)
125
            *p++ = c;
126
        else
127
            PUT_UTF8(mac_to_unicode[c-0x80], t, if (p < end) *p++ = t;);
128
    }
129
    *p = 0;
130
    return p - dst;
131
}
132

    
133
static int mov_read_udta_string(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
134
{
135
#ifdef MOV_EXPORT_ALL_METADATA
136
    char tmp_key[5];
137
#endif
138
    char str[1024], key2[16], language[4] = {0};
139
    const char *key = NULL;
140
    uint16_t str_size, langcode = 0;
141
    uint32_t data_type = 0;
142
    int (*parse)(MOVContext*, ByteIOContext*, unsigned) = NULL;
143

    
144
    switch (atom.type) {
145
    case MKTAG(0xa9,'n','a','m'): key = "title";     break;
146
    case MKTAG(0xa9,'a','u','t'):
147
    case MKTAG(0xa9,'A','R','T'): key = "artist";    break;
148
    case MKTAG(0xa9,'w','r','t'): key = "composer";  break;
149
    case MKTAG( 'c','p','r','t'):
150
    case MKTAG(0xa9,'c','p','y'): key = "copyright"; break;
151
    case MKTAG(0xa9,'c','m','t'):
152
    case MKTAG(0xa9,'i','n','f'): key = "comment";   break;
153
    case MKTAG(0xa9,'a','l','b'): key = "album";     break;
154
    case MKTAG(0xa9,'d','a','y'): key = "date";      break;
155
    case MKTAG(0xa9,'g','e','n'): key = "genre";     break;
156
    case MKTAG(0xa9,'t','o','o'):
157
    case MKTAG(0xa9,'e','n','c'): key = "encoder";   break;
158
    case MKTAG( 'd','e','s','c'): key = "description";break;
159
    case MKTAG( 'l','d','e','s'): key = "synopsis";  break;
160
    case MKTAG( 't','v','s','h'): key = "show";      break;
161
    case MKTAG( 't','v','e','n'): key = "episode_id";break;
162
    case MKTAG( 't','v','n','n'): key = "network";   break;
163
    case MKTAG( 't','r','k','n'): key = "track";
164
        parse = mov_metadata_trkn; break;
165
    }
166

    
167
    if (c->itunes_metadata && atom.size > 8) {
168
        int data_size = get_be32(pb);
169
        int tag = get_le32(pb);
170
        if (tag == MKTAG('d','a','t','a')) {
171
            data_type = get_be32(pb); // type
172
            get_be32(pb); // unknown
173
            str_size = data_size - 16;
174
            atom.size -= 16;
175
        } else return 0;
176
    } else if (atom.size > 4 && key && !c->itunes_metadata) {
177
        str_size = get_be16(pb); // string length
178
        langcode = get_be16(pb);
179
        ff_mov_lang_to_iso639(langcode, language);
180
        atom.size -= 4;
181
    } else
182
        str_size = atom.size;
183

    
184
#ifdef MOV_EXPORT_ALL_METADATA
185
    if (!key) {
186
        snprintf(tmp_key, 5, "%.4s", (char*)&atom.type);
187
        key = tmp_key;
188
    }
189
#endif
190

    
191
    if (!key)
192
        return 0;
193
    if (atom.size < 0)
194
        return -1;
195

    
196
    str_size = FFMIN3(sizeof(str)-1, str_size, atom.size);
197

    
198
    if (parse)
199
        parse(c, pb, str_size);
200
    else {
201
        if (data_type == 3 || (data_type == 0 && langcode < 0x800)) { // MAC Encoded
202
            mov_read_mac_string(c, pb, str_size, str, sizeof(str));
203
        } else {
204
            get_buffer(pb, str, str_size);
205
            str[str_size] = 0;
206
        }
207
        av_metadata_set2(&c->fc->metadata, key, str, 0);
208
        if (*language && strcmp(language, "und")) {
209
            snprintf(key2, sizeof(key2), "%s-%s", key, language);
210
            av_metadata_set2(&c->fc->metadata, key2, str, 0);
211
        }
212
    }
213
#ifdef DEBUG_METADATA
214
    av_log(c->fc, AV_LOG_DEBUG, "lang \"%3s\" ", language);
215
    av_log(c->fc, AV_LOG_DEBUG, "tag \"%s\" value \"%s\" atom \"%.4s\" %d %lld\n",
216
           key, str, (char*)&atom.type, str_size, atom.size);
217
#endif
218

    
219
    return 0;
220
}
221

    
222
static int mov_read_chpl(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
223
{
224
    int64_t start;
225
    int i, nb_chapters, str_len;
226
    char str[256+1];
227

    
228
    if ((atom.size -= 5) < 0)
229
        return 0;
230

    
231
    get_be32(pb); // version + flags
232
    get_be32(pb); // ???
233
    nb_chapters = get_byte(pb);
234

    
235
    for (i = 0; i < nb_chapters; i++) {
236
        if (atom.size < 9)
237
            return 0;
238

    
239
        start = get_be64(pb);
240
        str_len = get_byte(pb);
241

    
242
        if ((atom.size -= 9+str_len) < 0)
243
            return 0;
244

    
245
        get_buffer(pb, str, str_len);
246
        str[str_len] = 0;
247
        ff_new_chapter(c->fc, i, (AVRational){1,10000000}, start, AV_NOPTS_VALUE, str);
248
    }
249
    return 0;
250
}
251

    
252
static int mov_read_default(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
253
{
254
    int64_t total_size = 0;
255
    MOVAtom a;
256
    int i;
257

    
258
    if (atom.size < 0)
259
        atom.size = INT64_MAX;
260
    while (total_size + 8 < atom.size && !url_feof(pb)) {
261
        int (*parse)(MOVContext*, ByteIOContext*, MOVAtom) = NULL;
262
        a.size = atom.size;
263
        a.type=0;
264
        if(atom.size >= 8) {
265
            a.size = get_be32(pb);
266
            a.type = get_le32(pb);
267
        }
268
        dprintf(c->fc, "type: %08x '%.4s' parent:'%.4s' sz: %"PRId64" %"PRId64" %"PRId64"\n",
269
                a.type, (char*)&a.type, (char*)&atom.type, a.size, total_size, atom.size);
270
        total_size += 8;
271
        if (a.size == 1) { /* 64 bit extended size */
272
            a.size = get_be64(pb) - 8;
273
            total_size += 8;
274
        }
275
        if (a.size == 0) {
276
            a.size = atom.size - total_size;
277
            if (a.size <= 8)
278
                break;
279
        }
280
        a.size -= 8;
281
        if(a.size < 0)
282
            break;
283
        a.size = FFMIN(a.size, atom.size - total_size);
284

    
285
        for (i = 0; mov_default_parse_table[i].type; i++)
286
            if (mov_default_parse_table[i].type == a.type) {
287
                parse = mov_default_parse_table[i].parse;
288
                break;
289
            }
290

    
291
        // container is user data
292
        if (!parse && (atom.type == MKTAG('u','d','t','a') ||
293
                       atom.type == MKTAG('i','l','s','t')))
294
            parse = mov_read_udta_string;
295

    
296
        if (!parse) { /* skip leaf atoms data */
297
            url_fskip(pb, a.size);
298
        } else {
299
            int64_t start_pos = url_ftell(pb);
300
            int64_t left;
301
            int err = parse(c, pb, a);
302
            if (err < 0)
303
                return err;
304
            if (c->found_moov && c->found_mdat &&
305
                (url_is_streamed(pb) || start_pos + a.size == url_fsize(pb)))
306
                return 0;
307
            left = a.size - url_ftell(pb) + start_pos;
308
            if (left > 0) /* skip garbage at atom end */
309
                url_fskip(pb, left);
310
        }
311

    
312
        total_size += a.size;
313
    }
314

    
315
    if (total_size < atom.size && atom.size < 0x7ffff)
316
        url_fskip(pb, atom.size - total_size);
317

    
318
    return 0;
319
}
320

    
321
static int mov_read_dref(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
322
{
323
    AVStream *st;
324
    MOVStreamContext *sc;
325
    int entries, i, j;
326

    
327
    if (c->fc->nb_streams < 1)
328
        return 0;
329
    st = c->fc->streams[c->fc->nb_streams-1];
330
    sc = st->priv_data;
331

    
332
    get_be32(pb); // version + flags
333
    entries = get_be32(pb);
334
    if (entries >= UINT_MAX / sizeof(*sc->drefs))
335
        return -1;
336
    sc->drefs = av_mallocz(entries * sizeof(*sc->drefs));
337
    if (!sc->drefs)
338
        return AVERROR(ENOMEM);
339
    sc->drefs_count = entries;
340

    
341
    for (i = 0; i < sc->drefs_count; i++) {
342
        MOVDref *dref = &sc->drefs[i];
343
        uint32_t size = get_be32(pb);
344
        int64_t next = url_ftell(pb) + size - 4;
345

    
346
        dref->type = get_le32(pb);
347
        get_be32(pb); // version + flags
348
        dprintf(c->fc, "type %.4s size %d\n", (char*)&dref->type, size);
349

    
350
        if (dref->type == MKTAG('a','l','i','s') && size > 150) {
351
            /* macintosh alias record */
352
            uint16_t volume_len, len;
353
            int16_t type;
354

    
355
            url_fskip(pb, 10);
356

    
357
            volume_len = get_byte(pb);
358
            volume_len = FFMIN(volume_len, 27);
359
            get_buffer(pb, dref->volume, 27);
360
            dref->volume[volume_len] = 0;
361
            av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", dref->volume, volume_len);
362

    
363
            url_fskip(pb, 12);
364

    
365
            len = get_byte(pb);
366
            len = FFMIN(len, 63);
367
            get_buffer(pb, dref->filename, 63);
368
            dref->filename[len] = 0;
369
            av_log(c->fc, AV_LOG_DEBUG, "filename %s, len %d\n", dref->filename, len);
370

    
371
            url_fskip(pb, 16);
372

    
373
            /* read next level up_from_alias/down_to_target */
374
            dref->nlvl_from = get_be16(pb);
375
            dref->nlvl_to   = get_be16(pb);
376
            av_log(c->fc, AV_LOG_DEBUG, "nlvl from %d, nlvl to %d\n",
377
                   dref->nlvl_from, dref->nlvl_to);
378

    
379
            url_fskip(pb, 16);
380

    
381
            for (type = 0; type != -1 && url_ftell(pb) < next; ) {
382
                type = get_be16(pb);
383
                len = get_be16(pb);
384
                av_log(c->fc, AV_LOG_DEBUG, "type %d, len %d\n", type, len);
385
                if (len&1)
386
                    len += 1;
387
                if (type == 2) { // absolute path
388
                    av_free(dref->path);
389
                    dref->path = av_mallocz(len+1);
390
                    if (!dref->path)
391
                        return AVERROR(ENOMEM);
392
                    get_buffer(pb, dref->path, len);
393
                    if (len > volume_len && !strncmp(dref->path, dref->volume, volume_len)) {
394
                        len -= volume_len;
395
                        memmove(dref->path, dref->path+volume_len, len);
396
                        dref->path[len] = 0;
397
                    }
398
                    for (j = 0; j < len; j++)
399
                        if (dref->path[j] == ':')
400
                            dref->path[j] = '/';
401
                    av_log(c->fc, AV_LOG_DEBUG, "path %s\n", dref->path);
402
                } else if (type == 0) { // directory name
403
                    av_free(dref->dir);
404
                    dref->dir = av_malloc(len+1);
405
                    if (!dref->dir)
406
                        return AVERROR(ENOMEM);
407
                    get_buffer(pb, dref->dir, len);
408
                    dref->dir[len] = 0;
409
                    for (j = 0; j < len; j++)
410
                        if (dref->dir[j] == ':')
411
                            dref->dir[j] = '/';
412
                    av_log(c->fc, AV_LOG_DEBUG, "dir %s\n", dref->dir);
413
                } else
414
                    url_fskip(pb, len);
415
            }
416
        }
417
        url_fseek(pb, next, SEEK_SET);
418
    }
419
    return 0;
420
}
421

    
422
static int mov_read_hdlr(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
423
{
424
    AVStream *st;
425
    uint32_t type;
426
    uint32_t ctype;
427

    
428
    if (c->fc->nb_streams < 1) // meta before first trak
429
        return 0;
430

    
431
    st = c->fc->streams[c->fc->nb_streams-1];
432

    
433
    get_byte(pb); /* version */
434
    get_be24(pb); /* flags */
435

    
436
    /* component type */
437
    ctype = get_le32(pb);
438
    type = get_le32(pb); /* component subtype */
439

    
440
    dprintf(c->fc, "ctype= %.4s (0x%08x)\n", (char*)&ctype, ctype);
441
    dprintf(c->fc, "stype= %.4s\n", (char*)&type);
442

    
443
    if     (type == MKTAG('v','i','d','e'))
444
        st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
445
    else if(type == MKTAG('s','o','u','n'))
446
        st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
447
    else if(type == MKTAG('m','1','a',' '))
448
        st->codec->codec_id = CODEC_ID_MP2;
449
    else if(type == MKTAG('s','u','b','p'))
450
        st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
451

    
452
    get_be32(pb); /* component  manufacture */
453
    get_be32(pb); /* component flags */
454
    get_be32(pb); /* component flags mask */
455

    
456
    return 0;
457
}
458

    
459
int ff_mp4_read_descr_len(ByteIOContext *pb)
460
{
461
    int len = 0;
462
    int count = 4;
463
    while (count--) {
464
        int c = get_byte(pb);
465
        len = (len << 7) | (c & 0x7f);
466
        if (!(c & 0x80))
467
            break;
468
    }
469
    return len;
470
}
471

    
472
static int mp4_read_descr(AVFormatContext *fc, ByteIOContext *pb, int *tag)
473
{
474
    int len;
475
    *tag = get_byte(pb);
476
    len = ff_mp4_read_descr_len(pb);
477
    dprintf(fc, "MPEG4 description: tag=0x%02x len=%d\n", *tag, len);
478
    return len;
479
}
480

    
481
#define MP4ESDescrTag                   0x03
482
#define MP4DecConfigDescrTag            0x04
483
#define MP4DecSpecificDescrTag          0x05
484

    
485
static const AVCodecTag mp4_audio_types[] = {
486
    { CODEC_ID_MP3ON4, AOT_PS   }, /* old mp3on4 draft */
487
    { CODEC_ID_MP3ON4, AOT_L1   }, /* layer 1 */
488
    { CODEC_ID_MP3ON4, AOT_L2   }, /* layer 2 */
489
    { CODEC_ID_MP3ON4, AOT_L3   }, /* layer 3 */
490
    { CODEC_ID_MP4ALS, AOT_ALS  }, /* MPEG-4 ALS */
491
    { CODEC_ID_NONE,   AOT_NULL },
492
};
493

    
494
int ff_mov_read_esds(AVFormatContext *fc, ByteIOContext *pb, MOVAtom atom)
495
{
496
    AVStream *st;
497
    int tag, len;
498

    
499
    if (fc->nb_streams < 1)
500
        return 0;
501
    st = fc->streams[fc->nb_streams-1];
502

    
503
    get_be32(pb); /* version + flags */
504
    len = mp4_read_descr(fc, pb, &tag);
505
    if (tag == MP4ESDescrTag) {
506
        get_be16(pb); /* ID */
507
        get_byte(pb); /* priority */
508
    } else
509
        get_be16(pb); /* ID */
510

    
511
    len = mp4_read_descr(fc, pb, &tag);
512
    if (tag == MP4DecConfigDescrTag) {
513
        int object_type_id = get_byte(pb);
514
        get_byte(pb); /* stream type */
515
        get_be24(pb); /* buffer size db */
516
        get_be32(pb); /* max bitrate */
517
        get_be32(pb); /* avg bitrate */
518

    
519
        st->codec->codec_id= ff_codec_get_id(ff_mp4_obj_type, object_type_id);
520
        dprintf(fc, "esds object type id 0x%02x\n", object_type_id);
521
        len = mp4_read_descr(fc, pb, &tag);
522
        if (tag == MP4DecSpecificDescrTag) {
523
            dprintf(fc, "Specific MPEG4 header len=%d\n", len);
524
            if((uint64_t)len > (1<<30))
525
                return -1;
526
            st->codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
527
            if (!st->codec->extradata)
528
                return AVERROR(ENOMEM);
529
            get_buffer(pb, st->codec->extradata, len);
530
            st->codec->extradata_size = len;
531
            if (st->codec->codec_id == CODEC_ID_AAC) {
532
                MPEG4AudioConfig cfg;
533
                ff_mpeg4audio_get_config(&cfg, st->codec->extradata,
534
                                         st->codec->extradata_size);
535
                st->codec->channels = cfg.channels;
536
                if (cfg.object_type == 29 && cfg.sampling_index < 3) // old mp3on4
537
                    st->codec->sample_rate = ff_mpa_freq_tab[cfg.sampling_index];
538
                else if (cfg.ext_sample_rate)
539
                    st->codec->sample_rate = cfg.ext_sample_rate;
540
                else
541
                    st->codec->sample_rate = cfg.sample_rate;
542
                dprintf(fc, "mp4a config channels %d obj %d ext obj %d "
543
                        "sample rate %d ext sample rate %d\n", st->codec->channels,
544
                        cfg.object_type, cfg.ext_object_type,
545
                        cfg.sample_rate, cfg.ext_sample_rate);
546
                if (!(st->codec->codec_id = ff_codec_get_id(mp4_audio_types,
547
                                                            cfg.object_type)))
548
                    st->codec->codec_id = CODEC_ID_AAC;
549
            }
550
        }
551
    }
552
    return 0;
553
}
554

    
555
static int mov_read_esds(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
556
{
557
    return ff_mov_read_esds(c->fc, pb, atom);
558
}
559

    
560
static int mov_read_pasp(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
561
{
562
    const int num = get_be32(pb);
563
    const int den = get_be32(pb);
564
    AVStream *st;
565

    
566
    if (c->fc->nb_streams < 1)
567
        return 0;
568
    st = c->fc->streams[c->fc->nb_streams-1];
569

    
570
    if (den != 0) {
571
        if ((st->sample_aspect_ratio.den != 1 || st->sample_aspect_ratio.num) && // default
572
            (den != st->sample_aspect_ratio.den || num != st->sample_aspect_ratio.num))
573
            av_log(c->fc, AV_LOG_WARNING,
574
                   "sample aspect ratio already set to %d:%d, overriding by 'pasp' atom\n",
575
                   st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
576
        st->sample_aspect_ratio.num = num;
577
        st->sample_aspect_ratio.den = den;
578
    }
579
    return 0;
580
}
581

    
582
/* this atom contains actual media data */
583
static int mov_read_mdat(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
584
{
585
    if(atom.size == 0) /* wrong one (MP4) */
586
        return 0;
587
    c->found_mdat=1;
588
    return 0; /* now go for moov */
589
}
590

    
591
/* read major brand, minor version and compatible brands and store them as metadata */
592
static int mov_read_ftyp(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
593
{
594
    uint32_t minor_ver;
595
    int comp_brand_size;
596
    char minor_ver_str[11]; /* 32 bit integer -> 10 digits + null */
597
    char* comp_brands_str;
598
    uint8_t type[5] = {0};
599

    
600
    get_buffer(pb, type, 4);
601
    if (strcmp(type, "qt  "))
602
        c->isom = 1;
603
    av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
604
    av_metadata_set2(&c->fc->metadata, "major_brand", type, 0);
605
    minor_ver = get_be32(pb); /* minor version */
606
    snprintf(minor_ver_str, sizeof(minor_ver_str), "%d", minor_ver);
607
    av_metadata_set2(&c->fc->metadata, "minor_version", minor_ver_str, 0);
608

    
609
    comp_brand_size = atom.size - 8;
610
    if (comp_brand_size < 0)
611
        return -1;
612
    comp_brands_str = av_malloc(comp_brand_size + 1); /* Add null terminator */
613
    if (!comp_brands_str)
614
        return AVERROR(ENOMEM);
615
    get_buffer(pb, comp_brands_str, comp_brand_size);
616
    comp_brands_str[comp_brand_size] = 0;
617
    av_metadata_set2(&c->fc->metadata, "compatible_brands", comp_brands_str, 0);
618
    av_freep(&comp_brands_str);
619

    
620
    return 0;
621
}
622

    
623
/* this atom should contain all header atoms */
624
static int mov_read_moov(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
625
{
626
    if (mov_read_default(c, pb, atom) < 0)
627
        return -1;
628
    /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
629
    /* so we don't parse the whole file if over a network */
630
    c->found_moov=1;
631
    return 0; /* now go for mdat */
632
}
633

    
634
static int mov_read_moof(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
635
{
636
    c->fragment.moof_offset = url_ftell(pb) - 8;
637
    dprintf(c->fc, "moof offset %llx\n", c->fragment.moof_offset);
638
    return mov_read_default(c, pb, atom);
639
}
640

    
641
static int mov_read_mdhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
642
{
643
    AVStream *st;
644
    MOVStreamContext *sc;
645
    int version;
646
    char language[4] = {0};
647
    unsigned lang;
648

    
649
    if (c->fc->nb_streams < 1)
650
        return 0;
651
    st = c->fc->streams[c->fc->nb_streams-1];
652
    sc = st->priv_data;
653

    
654
    version = get_byte(pb);
655
    if (version > 1)
656
        return -1; /* unsupported */
657

    
658
    get_be24(pb); /* flags */
659
    if (version == 1) {
660
        get_be64(pb);
661
        get_be64(pb);
662
    } else {
663
        get_be32(pb); /* creation time */
664
        get_be32(pb); /* modification time */
665
    }
666

    
667
    sc->time_scale = get_be32(pb);
668
    st->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */
669

    
670
    lang = get_be16(pb); /* language */
671
    if (ff_mov_lang_to_iso639(lang, language))
672
        av_metadata_set2(&st->metadata, "language", language, 0);
673
    get_be16(pb); /* quality */
674

    
675
    return 0;
676
}
677

    
678
static int mov_read_mvhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
679
{
680
    int version = get_byte(pb); /* version */
681
    get_be24(pb); /* flags */
682

    
683
    if (version == 1) {
684
        get_be64(pb);
685
        get_be64(pb);
686
    } else {
687
        get_be32(pb); /* creation time */
688
        get_be32(pb); /* modification time */
689
    }
690
    c->time_scale = get_be32(pb); /* time scale */
691

    
692
    dprintf(c->fc, "time scale = %i\n", c->time_scale);
693

    
694
    c->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */
695
    get_be32(pb); /* preferred scale */
696

    
697
    get_be16(pb); /* preferred volume */
698

    
699
    url_fskip(pb, 10); /* reserved */
700

    
701
    url_fskip(pb, 36); /* display matrix */
702

    
703
    get_be32(pb); /* preview time */
704
    get_be32(pb); /* preview duration */
705
    get_be32(pb); /* poster time */
706
    get_be32(pb); /* selection time */
707
    get_be32(pb); /* selection duration */
708
    get_be32(pb); /* current time */
709
    get_be32(pb); /* next track ID */
710

    
711
    return 0;
712
}
713

    
714
static int mov_read_smi(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
715
{
716
    AVStream *st;
717

    
718
    if (c->fc->nb_streams < 1)
719
        return 0;
720
    st = c->fc->streams[c->fc->nb_streams-1];
721

    
722
    if((uint64_t)atom.size > (1<<30))
723
        return -1;
724

    
725
    // currently SVQ3 decoder expect full STSD header - so let's fake it
726
    // this should be fixed and just SMI header should be passed
727
    av_free(st->codec->extradata);
728
    st->codec->extradata = av_mallocz(atom.size + 0x5a + FF_INPUT_BUFFER_PADDING_SIZE);
729
    if (!st->codec->extradata)
730
        return AVERROR(ENOMEM);
731
    st->codec->extradata_size = 0x5a + atom.size;
732
    memcpy(st->codec->extradata, "SVQ3", 4); // fake
733
    get_buffer(pb, st->codec->extradata + 0x5a, atom.size);
734
    dprintf(c->fc, "Reading SMI %"PRId64"  %s\n", atom.size, st->codec->extradata + 0x5a);
735
    return 0;
736
}
737

    
738
static int mov_read_enda(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
739
{
740
    AVStream *st;
741
    int little_endian;
742

    
743
    if (c->fc->nb_streams < 1)
744
        return 0;
745
    st = c->fc->streams[c->fc->nb_streams-1];
746

    
747
    little_endian = get_be16(pb);
748
    dprintf(c->fc, "enda %d\n", little_endian);
749
    if (little_endian == 1) {
750
        switch (st->codec->codec_id) {
751
        case CODEC_ID_PCM_S24BE:
752
            st->codec->codec_id = CODEC_ID_PCM_S24LE;
753
            break;
754
        case CODEC_ID_PCM_S32BE:
755
            st->codec->codec_id = CODEC_ID_PCM_S32LE;
756
            break;
757
        case CODEC_ID_PCM_F32BE:
758
            st->codec->codec_id = CODEC_ID_PCM_F32LE;
759
            break;
760
        case CODEC_ID_PCM_F64BE:
761
            st->codec->codec_id = CODEC_ID_PCM_F64LE;
762
            break;
763
        default:
764
            break;
765
        }
766
    }
767
    return 0;
768
}
769

    
770
/* FIXME modify qdm2/svq3/h264 decoders to take full atom as extradata */
771
static int mov_read_extradata(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
772
{
773
    AVStream *st;
774
    uint64_t size;
775
    uint8_t *buf;
776

    
777
    if (c->fc->nb_streams < 1) // will happen with jp2 files
778
        return 0;
779
    st= c->fc->streams[c->fc->nb_streams-1];
780
    size= (uint64_t)st->codec->extradata_size + atom.size + 8 + FF_INPUT_BUFFER_PADDING_SIZE;
781
    if(size > INT_MAX || (uint64_t)atom.size > INT_MAX)
782
        return -1;
783
    buf= av_realloc(st->codec->extradata, size);
784
    if(!buf)
785
        return -1;
786
    st->codec->extradata= buf;
787
    buf+= st->codec->extradata_size;
788
    st->codec->extradata_size= size - FF_INPUT_BUFFER_PADDING_SIZE;
789
    AV_WB32(       buf    , atom.size + 8);
790
    AV_WL32(       buf + 4, atom.type);
791
    get_buffer(pb, buf + 8, atom.size);
792
    return 0;
793
}
794

    
795
static int mov_read_wave(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
796
{
797
    AVStream *st;
798

    
799
    if (c->fc->nb_streams < 1)
800
        return 0;
801
    st = c->fc->streams[c->fc->nb_streams-1];
802

    
803
    if((uint64_t)atom.size > (1<<30))
804
        return -1;
805

    
806
    if (st->codec->codec_id == CODEC_ID_QDM2) {
807
        // pass all frma atom to codec, needed at least for QDM2
808
        av_free(st->codec->extradata);
809
        st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
810
        if (!st->codec->extradata)
811
            return AVERROR(ENOMEM);
812
        st->codec->extradata_size = atom.size;
813
        get_buffer(pb, st->codec->extradata, atom.size);
814
    } else if (atom.size > 8) { /* to read frma, esds atoms */
815
        if (mov_read_default(c, pb, atom) < 0)
816
            return -1;
817
    } else
818
        url_fskip(pb, atom.size);
819
    return 0;
820
}
821

    
822
/**
823
 * This function reads atom content and puts data in extradata without tag
824
 * nor size unlike mov_read_extradata.
825
 */
826
static int mov_read_glbl(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
827
{
828
    AVStream *st;
829

    
830
    if (c->fc->nb_streams < 1)
831
        return 0;
832
    st = c->fc->streams[c->fc->nb_streams-1];
833

    
834
    if((uint64_t)atom.size > (1<<30))
835
        return -1;
836

    
837
    av_free(st->codec->extradata);
838
    st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
839
    if (!st->codec->extradata)
840
        return AVERROR(ENOMEM);
841
    st->codec->extradata_size = atom.size;
842
    get_buffer(pb, st->codec->extradata, atom.size);
843
    return 0;
844
}
845

    
846
/**
847
 * An strf atom is a BITMAPINFOHEADER struct. This struct is 40 bytes itself,
848
 * but can have extradata appended at the end after the 40 bytes belonging
849
 * to the struct.
850
 */
851
static int mov_read_strf(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
852
{
853
    AVStream *st;
854

    
855
    if (c->fc->nb_streams < 1)
856
        return 0;
857
    if (atom.size <= 40)
858
        return 0;
859
    st = c->fc->streams[c->fc->nb_streams-1];
860

    
861
    if((uint64_t)atom.size > (1<<30))
862
        return -1;
863

    
864
    av_free(st->codec->extradata);
865
    st->codec->extradata = av_mallocz(atom.size - 40 + FF_INPUT_BUFFER_PADDING_SIZE);
866
    if (!st->codec->extradata)
867
        return AVERROR(ENOMEM);
868
    st->codec->extradata_size = atom.size - 40;
869
    url_fskip(pb, 40);
870
    get_buffer(pb, st->codec->extradata, atom.size - 40);
871
    return 0;
872
}
873

    
874
static int mov_read_stco(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
875
{
876
    AVStream *st;
877
    MOVStreamContext *sc;
878
    unsigned int i, entries;
879

    
880
    if (c->fc->nb_streams < 1)
881
        return 0;
882
    st = c->fc->streams[c->fc->nb_streams-1];
883
    sc = st->priv_data;
884

    
885
    get_byte(pb); /* version */
886
    get_be24(pb); /* flags */
887

    
888
    entries = get_be32(pb);
889

    
890
    if(entries >= UINT_MAX/sizeof(int64_t))
891
        return -1;
892

    
893
    sc->chunk_offsets = av_malloc(entries * sizeof(int64_t));
894
    if (!sc->chunk_offsets)
895
        return AVERROR(ENOMEM);
896
    sc->chunk_count = entries;
897

    
898
    if      (atom.type == MKTAG('s','t','c','o'))
899
        for(i=0; i<entries; i++)
900
            sc->chunk_offsets[i] = get_be32(pb);
901
    else if (atom.type == MKTAG('c','o','6','4'))
902
        for(i=0; i<entries; i++)
903
            sc->chunk_offsets[i] = get_be64(pb);
904
    else
905
        return -1;
906

    
907
    return 0;
908
}
909

    
910
/**
911
 * Compute codec id for 'lpcm' tag.
912
 * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
913
 */
914
enum CodecID ff_mov_get_lpcm_codec_id(int bps, int flags)
915
{
916
    if (flags & 1) { // floating point
917
        if (flags & 2) { // big endian
918
            if      (bps == 32) return CODEC_ID_PCM_F32BE;
919
            else if (bps == 64) return CODEC_ID_PCM_F64BE;
920
        } else {
921
            if      (bps == 32) return CODEC_ID_PCM_F32LE;
922
            else if (bps == 64) return CODEC_ID_PCM_F64LE;
923
        }
924
    } else {
925
        if (flags & 2) {
926
            if      (bps == 8)
927
                // signed integer
928
                if (flags & 4)  return CODEC_ID_PCM_S8;
929
                else            return CODEC_ID_PCM_U8;
930
            else if (bps == 16) return CODEC_ID_PCM_S16BE;
931
            else if (bps == 24) return CODEC_ID_PCM_S24BE;
932
            else if (bps == 32) return CODEC_ID_PCM_S32BE;
933
        } else {
934
            if      (bps == 8)
935
                if (flags & 4)  return CODEC_ID_PCM_S8;
936
                else            return CODEC_ID_PCM_U8;
937
            else if (bps == 16) return CODEC_ID_PCM_S16LE;
938
            else if (bps == 24) return CODEC_ID_PCM_S24LE;
939
            else if (bps == 32) return CODEC_ID_PCM_S32LE;
940
        }
941
    }
942
    return CODEC_ID_NONE;
943
}
944

    
945
static int mov_read_stsd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
946
{
947
    AVStream *st;
948
    MOVStreamContext *sc;
949
    int j, entries, pseudo_stream_id;
950

    
951
    if (c->fc->nb_streams < 1)
952
        return 0;
953
    st = c->fc->streams[c->fc->nb_streams-1];
954
    sc = st->priv_data;
955

    
956
    get_byte(pb); /* version */
957
    get_be24(pb); /* flags */
958

    
959
    entries = get_be32(pb);
960

    
961
    for(pseudo_stream_id=0; pseudo_stream_id<entries; pseudo_stream_id++) {
962
        //Parsing Sample description table
963
        enum CodecID id;
964
        int dref_id = 1;
965
        MOVAtom a = { AV_RL32("stsd") };
966
        int64_t start_pos = url_ftell(pb);
967
        int size = get_be32(pb); /* size */
968
        uint32_t format = get_le32(pb); /* data format */
969

    
970
        if (size >= 16) {
971
            get_be32(pb); /* reserved */
972
            get_be16(pb); /* reserved */
973
            dref_id = get_be16(pb);
974
        }
975

    
976
        if (st->codec->codec_tag &&
977
            st->codec->codec_tag != format &&
978
            (c->fc->video_codec_id ? ff_codec_get_id(codec_movvideo_tags, format) != c->fc->video_codec_id
979
                                   : st->codec->codec_tag != MKTAG('j','p','e','g'))
980
           ){
981
            /* Multiple fourcc, we skip JPEG. This is not correct, we should
982
             * export it as a separate AVStream but this needs a few changes
983
             * in the MOV demuxer, patch welcome. */
984
            av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
985
            url_fskip(pb, size - (url_ftell(pb) - start_pos));
986
            continue;
987
        }
988
        sc->pseudo_stream_id = st->codec->codec_tag ? -1 : pseudo_stream_id;
989
        sc->dref_id= dref_id;
990

    
991
        st->codec->codec_tag = format;
992
        id = ff_codec_get_id(codec_movaudio_tags, format);
993
        if (id<=0 && ((format&0xFFFF) == 'm'+('s'<<8) || (format&0xFFFF) == 'T'+('S'<<8)))
994
            id = ff_codec_get_id(ff_codec_wav_tags, bswap_32(format)&0xFFFF);
995

    
996
        if (st->codec->codec_type != AVMEDIA_TYPE_VIDEO && id > 0) {
997
            st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
998
        } else if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO && /* do not overwrite codec type */
999
                   format && format != MKTAG('m','p','4','s')) { /* skip old asf mpeg4 tag */
1000
            id = ff_codec_get_id(codec_movvideo_tags, format);
1001
            if (id <= 0)
1002
                id = ff_codec_get_id(ff_codec_bmp_tags, format);
1003
            if (id > 0)
1004
                st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
1005
            else if(st->codec->codec_type == AVMEDIA_TYPE_DATA){
1006
                id = ff_codec_get_id(ff_codec_movsubtitle_tags, format);
1007
                if(id > 0)
1008
                    st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
1009
            }
1010
        }
1011

    
1012
        dprintf(c->fc, "size=%d 4CC= %c%c%c%c codec_type=%d\n", size,
1013
                (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff,
1014
                (format >> 24) & 0xff, st->codec->codec_type);
1015

    
1016
        if(st->codec->codec_type==AVMEDIA_TYPE_VIDEO) {
1017
            unsigned int color_depth, len;
1018
            int color_greyscale;
1019

    
1020
            st->codec->codec_id = id;
1021
            get_be16(pb); /* version */
1022
            get_be16(pb); /* revision level */
1023
            get_be32(pb); /* vendor */
1024
            get_be32(pb); /* temporal quality */
1025
            get_be32(pb); /* spatial quality */
1026

    
1027
            st->codec->width = get_be16(pb); /* width */
1028
            st->codec->height = get_be16(pb); /* height */
1029

    
1030
            get_be32(pb); /* horiz resolution */
1031
            get_be32(pb); /* vert resolution */
1032
            get_be32(pb); /* data size, always 0 */
1033
            get_be16(pb); /* frames per samples */
1034

    
1035
            len = get_byte(pb); /* codec name, pascal string */
1036
            if (len > 31)
1037
                len = 31;
1038
            mov_read_mac_string(c, pb, len, st->codec->codec_name, 32);
1039
            if (len < 31)
1040
                url_fskip(pb, 31 - len);
1041
            /* codec_tag YV12 triggers an UV swap in rawdec.c */
1042
            if (!memcmp(st->codec->codec_name, "Planar Y'CbCr 8-bit 4:2:0", 25))
1043
                st->codec->codec_tag=MKTAG('I', '4', '2', '0');
1044

    
1045
            st->codec->bits_per_coded_sample = get_be16(pb); /* depth */
1046
            st->codec->color_table_id = get_be16(pb); /* colortable id */
1047
            dprintf(c->fc, "depth %d, ctab id %d\n",
1048
                   st->codec->bits_per_coded_sample, st->codec->color_table_id);
1049
            /* figure out the palette situation */
1050
            color_depth = st->codec->bits_per_coded_sample & 0x1F;
1051
            color_greyscale = st->codec->bits_per_coded_sample & 0x20;
1052

    
1053
            /* if the depth is 2, 4, or 8 bpp, file is palettized */
1054
            if ((color_depth == 2) || (color_depth == 4) ||
1055
                (color_depth == 8)) {
1056
                /* for palette traversal */
1057
                unsigned int color_start, color_count, color_end;
1058
                unsigned char r, g, b;
1059

    
1060
                st->codec->palctrl = av_malloc(sizeof(*st->codec->palctrl));
1061
                if (color_greyscale) {
1062
                    int color_index, color_dec;
1063
                    /* compute the greyscale palette */
1064
                    st->codec->bits_per_coded_sample = color_depth;
1065
                    color_count = 1 << color_depth;
1066
                    color_index = 255;
1067
                    color_dec = 256 / (color_count - 1);
1068
                    for (j = 0; j < color_count; j++) {
1069
                        r = g = b = color_index;
1070
                        st->codec->palctrl->palette[j] =
1071
                            (r << 16) | (g << 8) | (b);
1072
                        color_index -= color_dec;
1073
                        if (color_index < 0)
1074
                            color_index = 0;
1075
                    }
1076
                } else if (st->codec->color_table_id) {
1077
                    const uint8_t *color_table;
1078
                    /* if flag bit 3 is set, use the default palette */
1079
                    color_count = 1 << color_depth;
1080
                    if (color_depth == 2)
1081
                        color_table = ff_qt_default_palette_4;
1082
                    else if (color_depth == 4)
1083
                        color_table = ff_qt_default_palette_16;
1084
                    else
1085
                        color_table = ff_qt_default_palette_256;
1086

    
1087
                    for (j = 0; j < color_count; j++) {
1088
                        r = color_table[j * 3 + 0];
1089
                        g = color_table[j * 3 + 1];
1090
                        b = color_table[j * 3 + 2];
1091
                        st->codec->palctrl->palette[j] =
1092
                            (r << 16) | (g << 8) | (b);
1093
                    }
1094
                } else {
1095
                    /* load the palette from the file */
1096
                    color_start = get_be32(pb);
1097
                    color_count = get_be16(pb);
1098
                    color_end = get_be16(pb);
1099
                    if ((color_start <= 255) &&
1100
                        (color_end <= 255)) {
1101
                        for (j = color_start; j <= color_end; j++) {
1102
                            /* each R, G, or B component is 16 bits;
1103
                             * only use the top 8 bits; skip alpha bytes
1104
                             * up front */
1105
                            get_byte(pb);
1106
                            get_byte(pb);
1107
                            r = get_byte(pb);
1108
                            get_byte(pb);
1109
                            g = get_byte(pb);
1110
                            get_byte(pb);
1111
                            b = get_byte(pb);
1112
                            get_byte(pb);
1113
                            st->codec->palctrl->palette[j] =
1114
                                (r << 16) | (g << 8) | (b);
1115
                        }
1116
                    }
1117
                }
1118
                st->codec->palctrl->palette_changed = 1;
1119
            }
1120
        } else if(st->codec->codec_type==AVMEDIA_TYPE_AUDIO) {
1121
            int bits_per_sample, flags;
1122
            uint16_t version = get_be16(pb);
1123

    
1124
            st->codec->codec_id = id;
1125
            get_be16(pb); /* revision level */
1126
            get_be32(pb); /* vendor */
1127

    
1128
            st->codec->channels = get_be16(pb);             /* channel count */
1129
            dprintf(c->fc, "audio channels %d\n", st->codec->channels);
1130
            st->codec->bits_per_coded_sample = get_be16(pb);      /* sample size */
1131

    
1132
            sc->audio_cid = get_be16(pb);
1133
            get_be16(pb); /* packet size = 0 */
1134

    
1135
            st->codec->sample_rate = ((get_be32(pb) >> 16));
1136

    
1137
            //Read QT version 1 fields. In version 0 these do not exist.
1138
            dprintf(c->fc, "version =%d, isom =%d\n",version,c->isom);
1139
            if(!c->isom) {
1140
                if(version==1) {
1141
                    sc->samples_per_frame = get_be32(pb);
1142
                    get_be32(pb); /* bytes per packet */
1143
                    sc->bytes_per_frame = get_be32(pb);
1144
                    get_be32(pb); /* bytes per sample */
1145
                } else if(version==2) {
1146
                    get_be32(pb); /* sizeof struct only */
1147
                    st->codec->sample_rate = av_int2dbl(get_be64(pb)); /* float 64 */
1148
                    st->codec->channels = get_be32(pb);
1149
                    get_be32(pb); /* always 0x7F000000 */
1150
                    st->codec->bits_per_coded_sample = get_be32(pb); /* bits per channel if sound is uncompressed */
1151
                    flags = get_be32(pb); /* lpcm format specific flag */
1152
                    sc->bytes_per_frame = get_be32(pb); /* bytes per audio packet if constant */
1153
                    sc->samples_per_frame = get_be32(pb); /* lpcm frames per audio packet if constant */
1154
                    if (format == MKTAG('l','p','c','m'))
1155
                        st->codec->codec_id = ff_mov_get_lpcm_codec_id(st->codec->bits_per_coded_sample, flags);
1156
                }
1157
            }
1158

    
1159
            switch (st->codec->codec_id) {
1160
            case CODEC_ID_PCM_S8:
1161
            case CODEC_ID_PCM_U8:
1162
                if (st->codec->bits_per_coded_sample == 16)
1163
                    st->codec->codec_id = CODEC_ID_PCM_S16BE;
1164
                break;
1165
            case CODEC_ID_PCM_S16LE:
1166
            case CODEC_ID_PCM_S16BE:
1167
                if (st->codec->bits_per_coded_sample == 8)
1168
                    st->codec->codec_id = CODEC_ID_PCM_S8;
1169
                else if (st->codec->bits_per_coded_sample == 24)
1170
                    st->codec->codec_id =
1171
                        st->codec->codec_id == CODEC_ID_PCM_S16BE ?
1172
                        CODEC_ID_PCM_S24BE : CODEC_ID_PCM_S24LE;
1173
                break;
1174
            /* set values for old format before stsd version 1 appeared */
1175
            case CODEC_ID_MACE3:
1176
                sc->samples_per_frame = 6;
1177
                sc->bytes_per_frame = 2*st->codec->channels;
1178
                break;
1179
            case CODEC_ID_MACE6:
1180
                sc->samples_per_frame = 6;
1181
                sc->bytes_per_frame = 1*st->codec->channels;
1182
                break;
1183
            case CODEC_ID_ADPCM_IMA_QT:
1184
                sc->samples_per_frame = 64;
1185
                sc->bytes_per_frame = 34*st->codec->channels;
1186
                break;
1187
            case CODEC_ID_GSM:
1188
                sc->samples_per_frame = 160;
1189
                sc->bytes_per_frame = 33;
1190
                break;
1191
            default:
1192
                break;
1193
            }
1194

    
1195
            bits_per_sample = av_get_bits_per_sample(st->codec->codec_id);
1196
            if (bits_per_sample) {
1197
                st->codec->bits_per_coded_sample = bits_per_sample;
1198
                sc->sample_size = (bits_per_sample >> 3) * st->codec->channels;
1199
            }
1200
        } else if(st->codec->codec_type==AVMEDIA_TYPE_SUBTITLE){
1201
            // ttxt stsd contains display flags, justification, background
1202
            // color, fonts, and default styles, so fake an atom to read it
1203
            MOVAtom fake_atom = { .size = size - (url_ftell(pb) - start_pos) };
1204
            if (format != AV_RL32("mp4s")) // mp4s contains a regular esds atom
1205
                mov_read_glbl(c, pb, fake_atom);
1206
            st->codec->codec_id= id;
1207
            st->codec->width = sc->width;
1208
            st->codec->height = sc->height;
1209
        } else {
1210
            /* other codec type, just skip (rtp, mp4s, tmcd ...) */
1211
            url_fskip(pb, size - (url_ftell(pb) - start_pos));
1212
        }
1213
        /* this will read extra atoms at the end (wave, alac, damr, avcC, SMI ...) */
1214
        a.size = size - (url_ftell(pb) - start_pos);
1215
        if (a.size > 8) {
1216
            if (mov_read_default(c, pb, a) < 0)
1217
                return -1;
1218
        } else if (a.size > 0)
1219
            url_fskip(pb, a.size);
1220
    }
1221

    
1222
    if(st->codec->codec_type==AVMEDIA_TYPE_AUDIO && st->codec->sample_rate==0 && sc->time_scale>1)
1223
        st->codec->sample_rate= sc->time_scale;
1224

    
1225
    /* special codec parameters handling */
1226
    switch (st->codec->codec_id) {
1227
#if CONFIG_DV_DEMUXER
1228
    case CODEC_ID_DVAUDIO:
1229
        c->dv_fctx = avformat_alloc_context();
1230
        c->dv_demux = dv_init_demux(c->dv_fctx);
1231
        if (!c->dv_demux) {
1232
            av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
1233
            return -1;
1234
        }
1235
        sc->dv_audio_container = 1;
1236
        st->codec->codec_id = CODEC_ID_PCM_S16LE;
1237
        break;
1238
#endif
1239
    /* no ifdef since parameters are always those */
1240
    case CODEC_ID_QCELP:
1241
        // force sample rate for qcelp when not stored in mov
1242
        if (st->codec->codec_tag != MKTAG('Q','c','l','p'))
1243
            st->codec->sample_rate = 8000;
1244
        st->codec->frame_size= 160;
1245
        st->codec->channels= 1; /* really needed */
1246
        break;
1247
    case CODEC_ID_AMR_NB:
1248
    case CODEC_ID_AMR_WB:
1249
        st->codec->frame_size= sc->samples_per_frame;
1250
        st->codec->channels= 1; /* really needed */
1251
        /* force sample rate for amr, stsd in 3gp does not store sample rate */
1252
        if (st->codec->codec_id == CODEC_ID_AMR_NB)
1253
            st->codec->sample_rate = 8000;
1254
        else if (st->codec->codec_id == CODEC_ID_AMR_WB)
1255
            st->codec->sample_rate = 16000;
1256
        break;
1257
    case CODEC_ID_MP2:
1258
    case CODEC_ID_MP3:
1259
        st->codec->codec_type = AVMEDIA_TYPE_AUDIO; /* force type after stsd for m1a hdlr */
1260
        st->need_parsing = AVSTREAM_PARSE_FULL;
1261
        break;
1262
    case CODEC_ID_GSM:
1263
    case CODEC_ID_ADPCM_MS:
1264
    case CODEC_ID_ADPCM_IMA_WAV:
1265
        st->codec->block_align = sc->bytes_per_frame;
1266
        break;
1267
    case CODEC_ID_ALAC:
1268
        if (st->codec->extradata_size == 36) {
1269
            st->codec->frame_size = AV_RB32(st->codec->extradata+12);
1270
            st->codec->channels   = AV_RB8 (st->codec->extradata+21);
1271
        }
1272
        break;
1273
    default:
1274
        break;
1275
    }
1276

    
1277
    return 0;
1278
}
1279

    
1280
static int mov_read_stsc(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1281
{
1282
    AVStream *st;
1283
    MOVStreamContext *sc;
1284
    unsigned int i, entries;
1285

    
1286
    if (c->fc->nb_streams < 1)
1287
        return 0;
1288
    st = c->fc->streams[c->fc->nb_streams-1];
1289
    sc = st->priv_data;
1290

    
1291
    get_byte(pb); /* version */
1292
    get_be24(pb); /* flags */
1293

    
1294
    entries = get_be32(pb);
1295

    
1296
    dprintf(c->fc, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
1297

    
1298
    if(entries >= UINT_MAX / sizeof(*sc->stsc_data))
1299
        return -1;
1300
    sc->stsc_data = av_malloc(entries * sizeof(*sc->stsc_data));
1301
    if (!sc->stsc_data)
1302
        return AVERROR(ENOMEM);
1303
    sc->stsc_count = entries;
1304

    
1305
    for(i=0; i<entries; i++) {
1306
        sc->stsc_data[i].first = get_be32(pb);
1307
        sc->stsc_data[i].count = get_be32(pb);
1308
        sc->stsc_data[i].id = get_be32(pb);
1309
    }
1310
    return 0;
1311
}
1312

    
1313
static int mov_read_stps(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1314
{
1315
    AVStream *st;
1316
    MOVStreamContext *sc;
1317
    unsigned i, entries;
1318

    
1319
    if (c->fc->nb_streams < 1)
1320
        return 0;
1321
    st = c->fc->streams[c->fc->nb_streams-1];
1322
    sc = st->priv_data;
1323

    
1324
    get_be32(pb); // version + flags
1325

    
1326
    entries = get_be32(pb);
1327
    if (entries >= UINT_MAX / sizeof(*sc->stps_data))
1328
        return -1;
1329
    sc->stps_data = av_malloc(entries * sizeof(*sc->stps_data));
1330
    if (!sc->stps_data)
1331
        return AVERROR(ENOMEM);
1332
    sc->stps_count = entries;
1333

    
1334
    for (i = 0; i < entries; i++) {
1335
        sc->stps_data[i] = get_be32(pb);
1336
        //dprintf(c->fc, "stps %d\n", sc->stps_data[i]);
1337
    }
1338

    
1339
    return 0;
1340
}
1341

    
1342
static int mov_read_stss(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1343
{
1344
    AVStream *st;
1345
    MOVStreamContext *sc;
1346
    unsigned int i, entries;
1347

    
1348
    if (c->fc->nb_streams < 1)
1349
        return 0;
1350
    st = c->fc->streams[c->fc->nb_streams-1];
1351
    sc = st->priv_data;
1352

    
1353
    get_byte(pb); /* version */
1354
    get_be24(pb); /* flags */
1355

    
1356
    entries = get_be32(pb);
1357

    
1358
    dprintf(c->fc, "keyframe_count = %d\n", entries);
1359

    
1360
    if(entries >= UINT_MAX / sizeof(int))
1361
        return -1;
1362
    sc->keyframes = av_malloc(entries * sizeof(int));
1363
    if (!sc->keyframes)
1364
        return AVERROR(ENOMEM);
1365
    sc->keyframe_count = entries;
1366

    
1367
    for(i=0; i<entries; i++) {
1368
        sc->keyframes[i] = get_be32(pb);
1369
        //dprintf(c->fc, "keyframes[]=%d\n", sc->keyframes[i]);
1370
    }
1371
    return 0;
1372
}
1373

    
1374
static int mov_read_stsz(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1375
{
1376
    AVStream *st;
1377
    MOVStreamContext *sc;
1378
    unsigned int i, entries, sample_size, field_size, num_bytes;
1379
    GetBitContext gb;
1380
    unsigned char* buf;
1381

    
1382
    if (c->fc->nb_streams < 1)
1383
        return 0;
1384
    st = c->fc->streams[c->fc->nb_streams-1];
1385
    sc = st->priv_data;
1386

    
1387
    get_byte(pb); /* version */
1388
    get_be24(pb); /* flags */
1389

    
1390
    if (atom.type == MKTAG('s','t','s','z')) {
1391
        sample_size = get_be32(pb);
1392
        if (!sc->sample_size) /* do not overwrite value computed in stsd */
1393
            sc->sample_size = sample_size;
1394
        field_size = 32;
1395
    } else {
1396
        sample_size = 0;
1397
        get_be24(pb); /* reserved */
1398
        field_size = get_byte(pb);
1399
    }
1400
    entries = get_be32(pb);
1401

    
1402
    dprintf(c->fc, "sample_size = %d sample_count = %d\n", sc->sample_size, entries);
1403

    
1404
    sc->sample_count = entries;
1405
    if (sample_size)
1406
        return 0;
1407

    
1408
    if (field_size != 4 && field_size != 8 && field_size != 16 && field_size != 32) {
1409
        av_log(c->fc, AV_LOG_ERROR, "Invalid sample field size %d\n", field_size);
1410
        return -1;
1411
    }
1412

    
1413
    if (entries >= UINT_MAX / sizeof(int) || entries >= (UINT_MAX - 4) / field_size)
1414
        return -1;
1415
    sc->sample_sizes = av_malloc(entries * sizeof(int));
1416
    if (!sc->sample_sizes)
1417
        return AVERROR(ENOMEM);
1418

    
1419
    num_bytes = (entries*field_size+4)>>3;
1420

    
1421
    buf = av_malloc(num_bytes+FF_INPUT_BUFFER_PADDING_SIZE);
1422
    if (!buf) {
1423
        av_freep(&sc->sample_sizes);
1424
        return AVERROR(ENOMEM);
1425
    }
1426

    
1427
    if (get_buffer(pb, buf, num_bytes) < num_bytes) {
1428
        av_freep(&sc->sample_sizes);
1429
        av_free(buf);
1430
        return -1;
1431
    }
1432

    
1433
    init_get_bits(&gb, buf, 8*num_bytes);
1434

    
1435
    for(i=0; i<entries; i++)
1436
        sc->sample_sizes[i] = get_bits_long(&gb, field_size);
1437

    
1438
    av_free(buf);
1439
    return 0;
1440
}
1441

    
1442
static int mov_read_stts(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1443
{
1444
    AVStream *st;
1445
    MOVStreamContext *sc;
1446
    unsigned int i, entries;
1447
    int64_t duration=0;
1448
    int64_t total_sample_count=0;
1449

    
1450
    if (c->fc->nb_streams < 1)
1451
        return 0;
1452
    st = c->fc->streams[c->fc->nb_streams-1];
1453
    sc = st->priv_data;
1454

    
1455
    get_byte(pb); /* version */
1456
    get_be24(pb); /* flags */
1457
    entries = get_be32(pb);
1458

    
1459
    dprintf(c->fc, "track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries);
1460

    
1461
    if(entries >= UINT_MAX / sizeof(*sc->stts_data))
1462
        return -1;
1463
    sc->stts_data = av_malloc(entries * sizeof(*sc->stts_data));
1464
    if (!sc->stts_data)
1465
        return AVERROR(ENOMEM);
1466
    sc->stts_count = entries;
1467

    
1468
    for(i=0; i<entries; i++) {
1469
        int sample_duration;
1470
        int sample_count;
1471

    
1472
        sample_count=get_be32(pb);
1473
        sample_duration = get_be32(pb);
1474
        sc->stts_data[i].count= sample_count;
1475
        sc->stts_data[i].duration= sample_duration;
1476

    
1477
        dprintf(c->fc, "sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);
1478

    
1479
        duration+=(int64_t)sample_duration*sample_count;
1480
        total_sample_count+=sample_count;
1481
    }
1482

    
1483
    st->nb_frames= total_sample_count;
1484
    if(duration)
1485
        st->duration= duration;
1486
    return 0;
1487
}
1488

    
1489
static int mov_read_ctts(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1490
{
1491
    AVStream *st;
1492
    MOVStreamContext *sc;
1493
    unsigned int i, entries;
1494

    
1495
    if (c->fc->nb_streams < 1)
1496
        return 0;
1497
    st = c->fc->streams[c->fc->nb_streams-1];
1498
    sc = st->priv_data;
1499

    
1500
    get_byte(pb); /* version */
1501
    get_be24(pb); /* flags */
1502
    entries = get_be32(pb);
1503

    
1504
    dprintf(c->fc, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
1505

    
1506
    if(entries >= UINT_MAX / sizeof(*sc->ctts_data))
1507
        return -1;
1508
    sc->ctts_data = av_malloc(entries * sizeof(*sc->ctts_data));
1509
    if (!sc->ctts_data)
1510
        return AVERROR(ENOMEM);
1511
    sc->ctts_count = entries;
1512

    
1513
    for(i=0; i<entries; i++) {
1514
        int count    =get_be32(pb);
1515
        int duration =get_be32(pb);
1516

    
1517
        sc->ctts_data[i].count   = count;
1518
        sc->ctts_data[i].duration= duration;
1519
        if (duration < 0)
1520
            sc->dts_shift = FFMAX(sc->dts_shift, -duration);
1521
    }
1522

    
1523
    dprintf(c->fc, "dts shift %d\n", sc->dts_shift);
1524

    
1525
    return 0;
1526
}
1527

    
1528
static void mov_build_index(MOVContext *mov, AVStream *st)
1529
{
1530
    MOVStreamContext *sc = st->priv_data;
1531
    int64_t current_offset;
1532
    int64_t current_dts = 0;
1533
    unsigned int stts_index = 0;
1534
    unsigned int stsc_index = 0;
1535
    unsigned int stss_index = 0;
1536
    unsigned int stps_index = 0;
1537
    unsigned int i, j;
1538
    uint64_t stream_size = 0;
1539

    
1540
    /* adjust first dts according to edit list */
1541
    if (sc->time_offset) {
1542
        int rescaled = sc->time_offset < 0 ? av_rescale(sc->time_offset, sc->time_scale, mov->time_scale) : sc->time_offset;
1543
        current_dts = -rescaled;
1544
        if (sc->ctts_data && sc->ctts_data[0].duration / sc->stts_data[0].duration > 16) {
1545
            /* more than 16 frames delay, dts are likely wrong
1546
               this happens with files created by iMovie */
1547
            sc->wrong_dts = 1;
1548
            st->codec->has_b_frames = 1;
1549
        }
1550
    }
1551

    
1552
    /* only use old uncompressed audio chunk demuxing when stts specifies it */
1553
    if (!(st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
1554
          sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
1555
        unsigned int current_sample = 0;
1556
        unsigned int stts_sample = 0;
1557
        unsigned int sample_size;
1558
        unsigned int distance = 0;
1559
        int key_off = sc->keyframes && sc->keyframes[0] == 1;
1560

    
1561
        current_dts -= sc->dts_shift;
1562

    
1563
        if (sc->sample_count >= UINT_MAX / sizeof(*st->index_entries))
1564
            return;
1565
        st->index_entries = av_malloc(sc->sample_count*sizeof(*st->index_entries));
1566
        if (!st->index_entries)
1567
            return;
1568
        st->index_entries_allocated_size = sc->sample_count*sizeof(*st->index_entries);
1569

    
1570
        for (i = 0; i < sc->chunk_count; i++) {
1571
            current_offset = sc->chunk_offsets[i];
1572
            if (stsc_index + 1 < sc->stsc_count &&
1573
                i + 1 == sc->stsc_data[stsc_index + 1].first)
1574
                stsc_index++;
1575
            for (j = 0; j < sc->stsc_data[stsc_index].count; j++) {
1576
                int keyframe = 0;
1577
                if (current_sample >= sc->sample_count) {
1578
                    av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
1579
                    return;
1580
                }
1581

    
1582
                if (!sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index]) {
1583
                    keyframe = 1;
1584
                    if (stss_index + 1 < sc->keyframe_count)
1585
                        stss_index++;
1586
                } else if (sc->stps_count && current_sample+key_off == sc->stps_data[stps_index]) {
1587
                    keyframe = 1;
1588
                    if (stps_index + 1 < sc->stps_count)
1589
                        stps_index++;
1590
                }
1591
                if (keyframe)
1592
                    distance = 0;
1593
                sample_size = sc->sample_size > 0 ? sc->sample_size : sc->sample_sizes[current_sample];
1594
                if(sc->pseudo_stream_id == -1 ||
1595
                   sc->stsc_data[stsc_index].id - 1 == sc->pseudo_stream_id) {
1596
                    AVIndexEntry *e = &st->index_entries[st->nb_index_entries++];
1597
                    e->pos = current_offset;
1598
                    e->timestamp = current_dts;
1599
                    e->size = sample_size;
1600
                    e->min_distance = distance;
1601
                    e->flags = keyframe ? AVINDEX_KEYFRAME : 0;
1602
                    dprintf(mov->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
1603
                            "size %d, distance %d, keyframe %d\n", st->index, current_sample,
1604
                            current_offset, current_dts, sample_size, distance, keyframe);
1605
                }
1606

    
1607
                current_offset += sample_size;
1608
                stream_size += sample_size;
1609
                current_dts += sc->stts_data[stts_index].duration;
1610
                distance++;
1611
                stts_sample++;
1612
                current_sample++;
1613
                if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
1614
                    stts_sample = 0;
1615
                    stts_index++;
1616
                }
1617
            }
1618
        }
1619
        if (st->duration > 0)
1620
            st->codec->bit_rate = stream_size*8*sc->time_scale/st->duration;
1621
    } else {
1622
        unsigned chunk_samples, total = 0;
1623

    
1624
        // compute total chunk count
1625
        for (i = 0; i < sc->stsc_count; i++) {
1626
            unsigned count, chunk_count;
1627

    
1628
            chunk_samples = sc->stsc_data[i].count;
1629
            if (sc->samples_per_frame && chunk_samples % sc->samples_per_frame) {
1630
                av_log(mov->fc, AV_LOG_ERROR, "error unaligned chunk\n");
1631
                return;
1632
            }
1633

    
1634
            if (sc->samples_per_frame >= 160) { // gsm
1635
                count = chunk_samples / sc->samples_per_frame;
1636
            } else if (sc->samples_per_frame > 1) {
1637
                unsigned samples = (1024/sc->samples_per_frame)*sc->samples_per_frame;
1638
                count = (chunk_samples+samples-1) / samples;
1639
            } else {
1640
                count = (chunk_samples+1023) / 1024;
1641
            }
1642

    
1643
            if (i < sc->stsc_count - 1)
1644
                chunk_count = sc->stsc_data[i+1].first - sc->stsc_data[i].first;
1645
            else
1646
                chunk_count = sc->chunk_count - (sc->stsc_data[i].first - 1);
1647
            total += chunk_count * count;
1648
        }
1649

    
1650
        dprintf(mov->fc, "chunk count %d\n", total);
1651
        if (total >= UINT_MAX / sizeof(*st->index_entries))
1652
            return;
1653
        st->index_entries = av_malloc(total*sizeof(*st->index_entries));
1654
        if (!st->index_entries)
1655
            return;
1656
        st->index_entries_allocated_size = total*sizeof(*st->index_entries);
1657

    
1658
        // populate index
1659
        for (i = 0; i < sc->chunk_count; i++) {
1660
            current_offset = sc->chunk_offsets[i];
1661
            if (stsc_index + 1 < sc->stsc_count &&
1662
                i + 1 == sc->stsc_data[stsc_index + 1].first)
1663
                stsc_index++;
1664
            chunk_samples = sc->stsc_data[stsc_index].count;
1665

    
1666
            while (chunk_samples > 0) {
1667
                AVIndexEntry *e;
1668
                unsigned size, samples;
1669

    
1670
                if (sc->samples_per_frame >= 160) { // gsm
1671
                    samples = sc->samples_per_frame;
1672
                    size = sc->bytes_per_frame;
1673
                } else {
1674
                    if (sc->samples_per_frame > 1) {
1675
                        samples = FFMIN((1024 / sc->samples_per_frame)*
1676
                                        sc->samples_per_frame, chunk_samples);
1677
                        size = (samples / sc->samples_per_frame) * sc->bytes_per_frame;
1678
                    } else {
1679
                        samples = FFMIN(1024, chunk_samples);
1680
                        size = samples * sc->sample_size;
1681
                    }
1682
                }
1683

    
1684
                if (st->nb_index_entries >= total) {
1685
                    av_log(mov->fc, AV_LOG_ERROR, "wrong chunk count %d\n", total);
1686
                    return;
1687
                }
1688
                e = &st->index_entries[st->nb_index_entries++];
1689
                e->pos = current_offset;
1690
                e->timestamp = current_dts;
1691
                e->size = size;
1692
                e->min_distance = 0;
1693
                e->flags = AVINDEX_KEYFRAME;
1694
                dprintf(mov->fc, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", "
1695
                        "size %d, duration %d\n", st->index, i, current_offset, current_dts,
1696
                        size, samples);
1697

    
1698
                current_offset += size;
1699
                current_dts += samples;
1700
                chunk_samples -= samples;
1701
            }
1702
        }
1703
    }
1704
}
1705

    
1706
static int mov_open_dref(ByteIOContext **pb, char *src, MOVDref *ref)
1707
{
1708
    /* try relative path, we do not try the absolute because it can leak information about our
1709
       system to an attacker */
1710
    if (ref->nlvl_to > 0 && ref->nlvl_from > 0) {
1711
        char filename[1024];
1712
        char *src_path;
1713
        int i, l;
1714

    
1715
        /* find a source dir */
1716
        src_path = strrchr(src, '/');
1717
        if (src_path)
1718
            src_path++;
1719
        else
1720
            src_path = src;
1721

    
1722
        /* find a next level down to target */
1723
        for (i = 0, l = strlen(ref->path) - 1; l >= 0; l--)
1724
            if (ref->path[l] == '/') {
1725
                if (i == ref->nlvl_to - 1)
1726
                    break;
1727
                else
1728
                    i++;
1729
            }
1730

    
1731
        /* compose filename if next level down to target was found */
1732
        if (i == ref->nlvl_to - 1 && src_path - src  < sizeof(filename)) {
1733
            memcpy(filename, src, src_path - src);
1734
            filename[src_path - src] = 0;
1735

    
1736
            for (i = 1; i < ref->nlvl_from; i++)
1737
                av_strlcat(filename, "../", 1024);
1738

    
1739
            av_strlcat(filename, ref->path + l + 1, 1024);
1740

    
1741
            if (!url_fopen(pb, filename, URL_RDONLY))
1742
                return 0;
1743
        }
1744
    }
1745

    
1746
    return AVERROR(ENOENT);
1747
};
1748

    
1749
static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1750
{
1751
    AVStream *st;
1752
    MOVStreamContext *sc;
1753
    int ret;
1754

    
1755
    st = av_new_stream(c->fc, c->fc->nb_streams);
1756
    if (!st) return AVERROR(ENOMEM);
1757
    sc = av_mallocz(sizeof(MOVStreamContext));
1758
    if (!sc) return AVERROR(ENOMEM);
1759

    
1760
    st->priv_data = sc;
1761
    st->codec->codec_type = AVMEDIA_TYPE_DATA;
1762
    sc->ffindex = st->index;
1763

    
1764
    if ((ret = mov_read_default(c, pb, atom)) < 0)
1765
        return ret;
1766

    
1767
    /* sanity checks */
1768
    if (sc->chunk_count && (!sc->stts_count || !sc->stsc_count ||
1769
                            (!sc->sample_size && !sc->sample_count))) {
1770
        av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
1771
               st->index);
1772
        return 0;
1773
    }
1774

    
1775
    if (!sc->time_scale) {
1776
        av_log(c->fc, AV_LOG_WARNING, "stream %d, timescale not set\n", st->index);
1777
        sc->time_scale = c->time_scale;
1778
        if (!sc->time_scale)
1779
            sc->time_scale = 1;
1780
    }
1781

    
1782
    av_set_pts_info(st, 64, 1, sc->time_scale);
1783

    
1784
    if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
1785
        !st->codec->frame_size && sc->stts_count == 1) {
1786
        st->codec->frame_size = av_rescale(sc->stts_data[0].duration,
1787
                                           st->codec->sample_rate, sc->time_scale);
1788
        dprintf(c->fc, "frame size %d\n", st->codec->frame_size);
1789
    }
1790

    
1791
    mov_build_index(c, st);
1792

    
1793
    if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
1794
        MOVDref *dref = &sc->drefs[sc->dref_id - 1];
1795
        if (mov_open_dref(&sc->pb, c->fc->filename, dref) < 0)
1796
            av_log(c->fc, AV_LOG_ERROR,
1797
                   "stream %d, error opening alias: path='%s', dir='%s', "
1798
                   "filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d\n",
1799
                   st->index, dref->path, dref->dir, dref->filename,
1800
                   dref->volume, dref->nlvl_from, dref->nlvl_to);
1801
    } else
1802
        sc->pb = c->fc->pb;
1803

    
1804
    if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1805
        if (!st->sample_aspect_ratio.num &&
1806
            (st->codec->width != sc->width || st->codec->height != sc->height)) {
1807
            st->sample_aspect_ratio = av_d2q(((double)st->codec->height * sc->width) /
1808
                                             ((double)st->codec->width * sc->height), INT_MAX);
1809
        }
1810

    
1811
        av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
1812
                  sc->time_scale*st->nb_frames, st->duration, INT_MAX);
1813
    }
1814

    
1815
    switch (st->codec->codec_id) {
1816
#if CONFIG_H261_DECODER
1817
    case CODEC_ID_H261:
1818
#endif
1819
#if CONFIG_H263_DECODER
1820
    case CODEC_ID_H263:
1821
#endif
1822
#if CONFIG_H264_DECODER
1823
    case CODEC_ID_H264:
1824
#endif
1825
#if CONFIG_MPEG4_DECODER
1826
    case CODEC_ID_MPEG4:
1827
#endif
1828
        st->codec->width = 0; /* let decoder init width/height */
1829
        st->codec->height= 0;
1830
        break;
1831
    }
1832

    
1833
    /* Do not need those anymore. */
1834
    av_freep(&sc->chunk_offsets);
1835
    av_freep(&sc->stsc_data);
1836
    av_freep(&sc->sample_sizes);
1837
    av_freep(&sc->keyframes);
1838
    av_freep(&sc->stts_data);
1839
    av_freep(&sc->stps_data);
1840

    
1841
    return 0;
1842
}
1843

    
1844
static int mov_read_ilst(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1845
{
1846
    int ret;
1847
    c->itunes_metadata = 1;
1848
    ret = mov_read_default(c, pb, atom);
1849
    c->itunes_metadata = 0;
1850
    return ret;
1851
}
1852

    
1853
static int mov_read_meta(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1854
{
1855
    while (atom.size > 8) {
1856
        uint32_t tag = get_le32(pb);
1857
        atom.size -= 4;
1858
        if (tag == MKTAG('h','d','l','r')) {
1859
            url_fseek(pb, -8, SEEK_CUR);
1860
            atom.size += 8;
1861
            return mov_read_default(c, pb, atom);
1862
        }
1863
    }
1864
    return 0;
1865
}
1866

    
1867
static int mov_read_tkhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1868
{
1869
    int i;
1870
    int width;
1871
    int height;
1872
    int64_t disp_transform[2];
1873
    int display_matrix[3][2];
1874
    AVStream *st;
1875
    MOVStreamContext *sc;
1876
    int version;
1877

    
1878
    if (c->fc->nb_streams < 1)
1879
        return 0;
1880
    st = c->fc->streams[c->fc->nb_streams-1];
1881
    sc = st->priv_data;
1882

    
1883
    version = get_byte(pb);
1884
    get_be24(pb); /* flags */
1885
    /*
1886
    MOV_TRACK_ENABLED 0x0001
1887
    MOV_TRACK_IN_MOVIE 0x0002
1888
    MOV_TRACK_IN_PREVIEW 0x0004
1889
    MOV_TRACK_IN_POSTER 0x0008
1890
    */
1891

    
1892
    if (version == 1) {
1893
        get_be64(pb);
1894
        get_be64(pb);
1895
    } else {
1896
        get_be32(pb); /* creation time */
1897
        get_be32(pb); /* modification time */
1898
    }
1899
    st->id = (int)get_be32(pb); /* track id (NOT 0 !)*/
1900
    get_be32(pb); /* reserved */
1901

    
1902
    /* highlevel (considering edits) duration in movie timebase */
1903
    (version == 1) ? get_be64(pb) : get_be32(pb);
1904
    get_be32(pb); /* reserved */
1905
    get_be32(pb); /* reserved */
1906

    
1907
    get_be16(pb); /* layer */
1908
    get_be16(pb); /* alternate group */
1909
    get_be16(pb); /* volume */
1910
    get_be16(pb); /* reserved */
1911

    
1912
    //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
1913
    // they're kept in fixed point format through all calculations
1914
    // ignore u,v,z b/c we don't need the scale factor to calc aspect ratio
1915
    for (i = 0; i < 3; i++) {
1916
        display_matrix[i][0] = get_be32(pb);   // 16.16 fixed point
1917
        display_matrix[i][1] = get_be32(pb);   // 16.16 fixed point
1918
        get_be32(pb);           // 2.30 fixed point (not used)
1919
    }
1920

    
1921
    width = get_be32(pb);       // 16.16 fixed point track width
1922
    height = get_be32(pb);      // 16.16 fixed point track height
1923
    sc->width = width >> 16;
1924
    sc->height = height >> 16;
1925

    
1926
    // transform the display width/height according to the matrix
1927
    // skip this if the display matrix is the default identity matrix
1928
    // or if it is rotating the picture, ex iPhone 3GS
1929
    // to keep the same scale, use [width height 1<<16]
1930
    if (width && height &&
1931
        ((display_matrix[0][0] != 65536  ||
1932
          display_matrix[1][1] != 65536) &&
1933
         !display_matrix[0][1] &&
1934
         !display_matrix[1][0] &&
1935
         !display_matrix[2][0] && !display_matrix[2][1])) {
1936
        for (i = 0; i < 2; i++)
1937
            disp_transform[i] =
1938
                (int64_t)  width  * display_matrix[0][i] +
1939
                (int64_t)  height * display_matrix[1][i] +
1940
                ((int64_t) display_matrix[2][i] << 16);
1941

    
1942
        //sample aspect ratio is new width/height divided by old width/height
1943
        st->sample_aspect_ratio = av_d2q(
1944
            ((double) disp_transform[0] * height) /
1945
            ((double) disp_transform[1] * width), INT_MAX);
1946
    }
1947
    return 0;
1948
}
1949

    
1950
static int mov_read_tfhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1951
{
1952
    MOVFragment *frag = &c->fragment;
1953
    MOVTrackExt *trex = NULL;
1954
    int flags, track_id, i;
1955

    
1956
    get_byte(pb); /* version */
1957
    flags = get_be24(pb);
1958

    
1959
    track_id = get_be32(pb);
1960
    if (!track_id)
1961
        return -1;
1962
    frag->track_id = track_id;
1963
    for (i = 0; i < c->trex_count; i++)
1964
        if (c->trex_data[i].track_id == frag->track_id) {
1965
            trex = &c->trex_data[i];
1966
            break;
1967
        }
1968
    if (!trex) {
1969
        av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
1970
        return -1;
1971
    }
1972

    
1973
    if (flags & 0x01) frag->base_data_offset = get_be64(pb);
1974
    else              frag->base_data_offset = frag->moof_offset;
1975
    if (flags & 0x02) frag->stsd_id          = get_be32(pb);
1976
    else              frag->stsd_id          = trex->stsd_id;
1977

    
1978
    frag->duration = flags & 0x08 ? get_be32(pb) : trex->duration;
1979
    frag->size     = flags & 0x10 ? get_be32(pb) : trex->size;
1980
    frag->flags    = flags & 0x20 ? get_be32(pb) : trex->flags;
1981
    dprintf(c->fc, "frag flags 0x%x\n", frag->flags);
1982
    return 0;
1983
}
1984

    
1985
static int mov_read_chap(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1986
{
1987
    c->chapter_track = get_be32(pb);
1988
    return 0;
1989
}
1990

    
1991
static int mov_read_trex(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1992
{
1993
    MOVTrackExt *trex;
1994

    
1995
    if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
1996
        return -1;
1997
    trex = av_realloc(c->trex_data, (c->trex_count+1)*sizeof(*c->trex_data));
1998
    if (!trex)
1999
        return AVERROR(ENOMEM);
2000
    c->trex_data = trex;
2001
    trex = &c->trex_data[c->trex_count++];
2002
    get_byte(pb); /* version */
2003
    get_be24(pb); /* flags */
2004
    trex->track_id = get_be32(pb);
2005
    trex->stsd_id  = get_be32(pb);
2006
    trex->duration = get_be32(pb);
2007
    trex->size     = get_be32(pb);
2008
    trex->flags    = get_be32(pb);
2009
    return 0;
2010
}
2011

    
2012
static int mov_read_trun(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
2013
{
2014
    MOVFragment *frag = &c->fragment;
2015
    AVStream *st = NULL;
2016
    MOVStreamContext *sc;
2017
    uint64_t offset;
2018
    int64_t dts;
2019
    int data_offset = 0;
2020
    unsigned entries, first_sample_flags = frag->flags;
2021
    int flags, distance, i;
2022

    
2023
    for (i = 0; i < c->fc->nb_streams; i++) {
2024
        if (c->fc->streams[i]->id == frag->track_id) {
2025
            st = c->fc->streams[i];
2026
            break;
2027
        }
2028
    }
2029
    if (!st) {
2030
        av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %d\n", frag->track_id);
2031
        return -1;
2032
    }
2033
    sc = st->priv_data;
2034
    if (sc->pseudo_stream_id+1 != frag->stsd_id)
2035
        return 0;
2036
    get_byte(pb); /* version */
2037
    flags = get_be24(pb);
2038
    entries = get_be32(pb);
2039
    dprintf(c->fc, "flags 0x%x entries %d\n", flags, entries);
2040
    if (flags & 0x001) data_offset        = get_be32(pb);
2041
    if (flags & 0x004) first_sample_flags = get_be32(pb);
2042
    if (flags & 0x800) {
2043
        MOVStts *ctts_data;
2044
        if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
2045
            return -1;
2046
        ctts_data = av_realloc(sc->ctts_data,
2047
                               (entries+sc->ctts_count)*sizeof(*sc->ctts_data));
2048
        if (!ctts_data)
2049
            return AVERROR(ENOMEM);
2050
        sc->ctts_data = ctts_data;
2051
    }
2052
    dts = st->duration;
2053
    offset = frag->base_data_offset + data_offset;
2054
    distance = 0;
2055
    dprintf(c->fc, "first sample flags 0x%x\n", first_sample_flags);
2056
    for (i = 0; i < entries; i++) {
2057
        unsigned sample_size = frag->size;
2058
        int sample_flags = i ? frag->flags : first_sample_flags;
2059
        unsigned sample_duration = frag->duration;
2060
        int keyframe;
2061

    
2062
        if (flags & 0x100) sample_duration = get_be32(pb);
2063
        if (flags & 0x200) sample_size     = get_be32(pb);
2064
        if (flags & 0x400) sample_flags    = get_be32(pb);
2065
        if (flags & 0x800) {
2066
            sc->ctts_data[sc->ctts_count].count = 1;
2067
            sc->ctts_data[sc->ctts_count].duration = get_be32(pb);
2068
            sc->ctts_count++;
2069
        }
2070
        if ((keyframe = st->codec->codec_type == AVMEDIA_TYPE_AUDIO ||
2071
             (flags & 0x004 && !i && !sample_flags) || sample_flags & 0x2000000))
2072
            distance = 0;
2073
        av_add_index_entry(st, offset, dts, sample_size, distance,
2074
                           keyframe ? AVINDEX_KEYFRAME : 0);
2075
        dprintf(c->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
2076
                "size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
2077
                offset, dts, sample_size, distance, keyframe);
2078
        distance++;
2079
        dts += sample_duration;
2080
        offset += sample_size;
2081
    }
2082
    frag->moof_offset = offset;
2083
    st->duration = dts;
2084
    return 0;
2085
}
2086

    
2087
/* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
2088
/* like the files created with Adobe Premiere 5.0, for samples see */
2089
/* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
2090
static int mov_read_wide(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
2091
{
2092
    int err;
2093

    
2094
    if (atom.size < 8)
2095
        return 0; /* continue */
2096
    if (get_be32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
2097
        url_fskip(pb, atom.size - 4);
2098
        return 0;
2099
    }
2100
    atom.type = get_le32(pb);
2101
    atom.size -= 8;
2102
    if (atom.type != MKTAG('m','d','a','t')) {
2103
        url_fskip(pb, atom.size);
2104
        return 0;
2105
    }
2106
    err = mov_read_mdat(c, pb, atom);
2107
    return err;
2108
}
2109

    
2110
static int mov_read_cmov(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
2111
{
2112
#if CONFIG_ZLIB
2113
    ByteIOContext ctx;
2114
    uint8_t *cmov_data;
2115
    uint8_t *moov_data; /* uncompressed data */
2116
    long cmov_len, moov_len;
2117
    int ret = -1;
2118

    
2119
    get_be32(pb); /* dcom atom */
2120
    if (get_le32(pb) != MKTAG('d','c','o','m'))
2121
        return -1;
2122
    if (get_le32(pb) != MKTAG('z','l','i','b')) {
2123
        av_log(c->fc, AV_LOG_ERROR, "unknown compression for cmov atom !");
2124
        return -1;
2125
    }
2126
    get_be32(pb); /* cmvd atom */
2127
    if (get_le32(pb) != MKTAG('c','m','v','d'))
2128
        return -1;
2129
    moov_len = get_be32(pb); /* uncompressed size */
2130
    cmov_len = atom.size - 6 * 4;
2131

    
2132
    cmov_data = av_malloc(cmov_len);
2133
    if (!cmov_data)
2134
        return AVERROR(ENOMEM);
2135
    moov_data = av_malloc(moov_len);
2136
    if (!moov_data) {
2137
        av_free(cmov_data);
2138
        return AVERROR(ENOMEM);
2139
    }
2140
    get_buffer(pb, cmov_data, cmov_len);
2141
    if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
2142
        goto free_and_return;
2143
    if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
2144
        goto free_and_return;
2145
    atom.type = MKTAG('m','o','o','v');
2146
    atom.size = moov_len;
2147
#ifdef DEBUG
2148
//    { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }
2149
#endif
2150
    ret = mov_read_default(c, &ctx, atom);
2151
free_and_return:
2152
    av_free(moov_data);
2153
    av_free(cmov_data);
2154
    return ret;
2155
#else
2156
    av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
2157
    return -1;
2158
#endif
2159
}
2160

    
2161
/* edit list atom */
2162
static int mov_read_elst(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
2163
{
2164
    MOVStreamContext *sc;
2165
    int i, edit_count;
2166

    
2167
    if (c->fc->nb_streams < 1)
2168
        return 0;
2169
    sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
2170

    
2171
    get_byte(pb); /* version */
2172
    get_be24(pb); /* flags */
2173
    edit_count = get_be32(pb); /* entries */
2174

    
2175
    if((uint64_t)edit_count*12+8 > atom.size)
2176
        return -1;
2177

    
2178
    for(i=0; i<edit_count; i++){
2179
        int time;
2180
        int duration = get_be32(pb); /* Track duration */
2181
        time = get_be32(pb); /* Media time */
2182
        get_be32(pb); /* Media rate */
2183
        if (i == 0 && time >= -1) {
2184
            sc->time_offset = time != -1 ? time : -duration;
2185
        }
2186
    }
2187

    
2188
    if(edit_count > 1)
2189
        av_log(c->fc, AV_LOG_WARNING, "multiple edit list entries, "
2190
               "a/v desync might occur, patch welcome\n");
2191

    
2192
    dprintf(c->fc, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, edit_count);
2193
    return 0;
2194
}
2195

    
2196
static const MOVParseTableEntry mov_default_parse_table[] = {
2197
{ MKTAG('a','v','s','s'), mov_read_extradata },
2198
{ MKTAG('c','h','p','l'), mov_read_chpl },
2199
{ MKTAG('c','o','6','4'), mov_read_stco },
2200
{ MKTAG('c','t','t','s'), mov_read_ctts }, /* composition time to sample */
2201
{ MKTAG('d','i','n','f'), mov_read_default },
2202
{ MKTAG('d','r','e','f'), mov_read_dref },
2203
{ MKTAG('e','d','t','s'), mov_read_default },
2204
{ MKTAG('e','l','s','t'), mov_read_elst },
2205
{ MKTAG('e','n','d','a'), mov_read_enda },
2206
{ MKTAG('f','i','e','l'), mov_read_extradata },
2207
{ MKTAG('f','t','y','p'), mov_read_ftyp },
2208
{ MKTAG('g','l','b','l'), mov_read_glbl },
2209
{ MKTAG('h','d','l','r'), mov_read_hdlr },
2210
{ MKTAG('i','l','s','t'), mov_read_ilst },
2211
{ MKTAG('j','p','2','h'), mov_read_extradata },
2212
{ MKTAG('m','d','a','t'), mov_read_mdat },
2213
{ MKTAG('m','d','h','d'), mov_read_mdhd },
2214
{ MKTAG('m','d','i','a'), mov_read_default },
2215
{ MKTAG('m','e','t','a'), mov_read_meta },
2216
{ MKTAG('m','i','n','f'), mov_read_default },
2217
{ MKTAG('m','o','o','f'), mov_read_moof },
2218
{ MKTAG('m','o','o','v'), mov_read_moov },
2219
{ MKTAG('m','v','e','x'), mov_read_default },
2220
{ MKTAG('m','v','h','d'), mov_read_mvhd },
2221
{ MKTAG('S','M','I',' '), mov_read_smi }, /* Sorenson extension ??? */
2222
{ MKTAG('a','l','a','c'), mov_read_extradata }, /* alac specific atom */
2223
{ MKTAG('a','v','c','C'), mov_read_glbl },
2224
{ MKTAG('p','a','s','p'), mov_read_pasp },
2225
{ MKTAG('s','t','b','l'), mov_read_default },
2226
{ MKTAG('s','t','c','o'), mov_read_stco },
2227
{ MKTAG('s','t','p','s'), mov_read_stps },
2228
{ MKTAG('s','t','r','f'), mov_read_strf },
2229
{ MKTAG('s','t','s','c'), mov_read_stsc },
2230
{ MKTAG('s','t','s','d'), mov_read_stsd }, /* sample description */
2231
{ MKTAG('s','t','s','s'), mov_read_stss }, /* sync sample */
2232
{ MKTAG('s','t','s','z'), mov_read_stsz }, /* sample size */
2233
{ MKTAG('s','t','t','s'), mov_read_stts },
2234
{ MKTAG('s','t','z','2'), mov_read_stsz }, /* compact sample size */
2235
{ MKTAG('t','k','h','d'), mov_read_tkhd }, /* track header */
2236
{ MKTAG('t','f','h','d'), mov_read_tfhd }, /* track fragment header */
2237
{ MKTAG('t','r','a','k'), mov_read_trak },
2238
{ MKTAG('t','r','a','f'), mov_read_default },
2239
{ MKTAG('t','r','e','f'), mov_read_default },
2240
{ MKTAG('c','h','a','p'), mov_read_chap },
2241
{ MKTAG('t','r','e','x'), mov_read_trex },
2242
{ MKTAG('t','r','u','n'), mov_read_trun },
2243
{ MKTAG('u','d','t','a'), mov_read_default },
2244
{ MKTAG('w','a','v','e'), mov_read_wave },
2245
{ MKTAG('e','s','d','s'), mov_read_esds },
2246
{ MKTAG('w','i','d','e'), mov_read_wide }, /* place holder */
2247
{ MKTAG('c','m','o','v'), mov_read_cmov },
2248
{ 0, NULL }
2249
};
2250

    
2251
static int mov_probe(AVProbeData *p)
2252
{
2253
    unsigned int offset;
2254
    uint32_t tag;
2255
    int score = 0;
2256

    
2257
    /* check file header */
2258
    offset = 0;
2259
    for(;;) {
2260
        /* ignore invalid offset */
2261
        if ((offset + 8) > (unsigned int)p->buf_size)
2262
            return score;
2263
        tag = AV_RL32(p->buf + offset + 4);
2264
        switch(tag) {
2265
        /* check for obvious tags */
2266
        case MKTAG('j','P',' ',' '): /* jpeg 2000 signature */
2267
        case MKTAG('m','o','o','v'):
2268
        case MKTAG('m','d','a','t'):
2269
        case MKTAG('p','n','o','t'): /* detect movs with preview pics like ew.mov and april.mov */
2270
        case MKTAG('u','d','t','a'): /* Packet Video PVAuthor adds this and a lot of more junk */
2271
        case MKTAG('f','t','y','p'):
2272
            return AVPROBE_SCORE_MAX;
2273
        /* those are more common words, so rate then a bit less */
2274
        case MKTAG('e','d','i','w'): /* xdcam files have reverted first tags */
2275
        case MKTAG('w','i','d','e'):
2276
        case MKTAG('f','r','e','e'):
2277
        case MKTAG('j','u','n','k'):
2278
        case MKTAG('p','i','c','t'):
2279
            return AVPROBE_SCORE_MAX - 5;
2280
        case MKTAG(0x82,0x82,0x7f,0x7d):
2281
        case MKTAG('s','k','i','p'):
2282
        case MKTAG('u','u','i','d'):
2283
        case MKTAG('p','r','f','l'):
2284
            offset = AV_RB32(p->buf+offset) + offset;
2285
            /* if we only find those cause probedata is too small at least rate them */
2286
            score = AVPROBE_SCORE_MAX - 50;
2287
            break;
2288
        default:
2289
            /* unrecognized tag */
2290
            return score;
2291
        }
2292
    }
2293
    return score;
2294
}
2295

    
2296
// must be done after parsing all trak because there's no order requirement
2297
static void mov_read_chapters(AVFormatContext *s)
2298
{
2299
    MOVContext *mov = s->priv_data;
2300
    AVStream *st = NULL;
2301
    MOVStreamContext *sc;
2302
    int64_t cur_pos;
2303
    uint8_t *title = NULL;
2304
    int i, len, i8, i16;
2305

    
2306
    for (i = 0; i < s->nb_streams; i++)
2307
        if (s->streams[i]->id == mov->chapter_track) {
2308
            st = s->streams[i];
2309
            break;
2310
        }
2311
    if (!st) {
2312
        av_log(s, AV_LOG_ERROR, "Referenced QT chapter track not found\n");
2313
        return;
2314
    }
2315

    
2316
    st->discard = AVDISCARD_ALL;
2317
    sc = st->priv_data;
2318
    cur_pos = url_ftell(sc->pb);
2319

    
2320
    for (i = 0; i < st->nb_index_entries; i++) {
2321
        AVIndexEntry *sample = &st->index_entries[i];
2322
        int64_t end = i+1 < st->nb_index_entries ? st->index_entries[i+1].timestamp : st->duration;
2323

    
2324
        if (url_fseek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
2325
            av_log(s, AV_LOG_ERROR, "Chapter %d not found in file\n", i);
2326
            goto finish;
2327
        }
2328

    
2329
        title = av_malloc(sample->size+2);
2330
        get_buffer(sc->pb, title, sample->size);
2331

    
2332
        // the first two bytes are the length of the title
2333
        len = AV_RB16(title);
2334
        if (len > sample->size-2)
2335
            continue;
2336

    
2337
        // The samples could theoretically be in any encoding if there's an encd
2338
        // atom following, but in practice are only utf-8 or utf-16, distinguished
2339
        // instead by the presence of a BOM
2340
        if (AV_RB16(title+2) == 0xfeff) {
2341
            uint8_t *utf8 = av_malloc(2*len+3);
2342

    
2343
            i8 = i16 = 0;
2344
            while (i16 < len) {
2345
                uint32_t ch;
2346
                uint8_t tmp;
2347
                GET_UTF16(ch, i16 < len ? AV_RB16(title + (i16+=2)) : 0, break;)
2348
                PUT_UTF8(ch, tmp, if (i8 < 2*len) utf8[2+i8++] = tmp;)
2349
            }
2350
            utf8[2+i8] = 0;
2351
            av_freep(&title);
2352
            title = utf8;
2353
        }
2354

    
2355
        ff_new_chapter(s, i, st->time_base, sample->timestamp, end, title+2);
2356
        av_freep(&title);
2357
    }
2358
finish:
2359
    av_free(title);
2360
    url_fseek(sc->pb, cur_pos, SEEK_SET);
2361
}
2362

    
2363
static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)
2364
{
2365
    MOVContext *mov = s->priv_data;
2366
    ByteIOContext *pb = s->pb;
2367
    int err;
2368
    MOVAtom atom = { AV_RL32("root") };
2369

    
2370
    mov->fc = s;
2371
    /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
2372
    if(!url_is_streamed(pb))
2373
        atom.size = url_fsize(pb);
2374
    else
2375
        atom.size = INT64_MAX;
2376

    
2377
    /* check MOV header */
2378
    if ((err = mov_read_default(mov, pb, atom)) < 0) {
2379
        av_log(s, AV_LOG_ERROR, "error reading header: %d\n", err);
2380
        return err;
2381
    }
2382
    if (!mov->found_moov) {
2383
        av_log(s, AV_LOG_ERROR, "moov atom not found\n");
2384
        return -1;
2385
    }
2386
    dprintf(mov->fc, "on_parse_exit_offset=%lld\n", url_ftell(pb));
2387

    
2388
    if (!url_is_streamed(pb) && mov->chapter_track > 0)
2389
        mov_read_chapters(s);
2390

    
2391
    return 0;
2392
}
2393

    
2394
static AVIndexEntry *mov_find_next_sample(AVFormatContext *s, AVStream **st)
2395
{
2396
    AVIndexEntry *sample = NULL;
2397
    int64_t best_dts = INT64_MAX;
2398
    int i;
2399
    for (i = 0; i < s->nb_streams; i++) {
2400
        AVStream *avst = s->streams[i];
2401
        MOVStreamContext *msc = avst->priv_data;
2402
        if (msc->pb && msc->current_sample < avst->nb_index_entries) {
2403
            AVIndexEntry *current_sample = &avst->index_entries[msc->current_sample];
2404
            int64_t dts = av_rescale(current_sample->timestamp, AV_TIME_BASE, msc->time_scale);
2405
            dprintf(s, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts);
2406
            if (!sample || (url_is_streamed(s->pb) && current_sample->pos < sample->pos) ||
2407
                (!url_is_streamed(s->pb) &&
2408
                 ((msc->pb != s->pb && dts < best_dts) || (msc->pb == s->pb &&
2409
                 ((FFABS(best_dts - dts) <= AV_TIME_BASE && current_sample->pos < sample->pos) ||
2410
                  (FFABS(best_dts - dts) > AV_TIME_BASE && dts < best_dts)))))) {
2411
                sample = current_sample;
2412
                best_dts = dts;
2413
                *st = avst;
2414
            }
2415
        }
2416
    }
2417
    return sample;
2418
}
2419

    
2420
static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
2421
{
2422
    MOVContext *mov = s->priv_data;
2423
    MOVStreamContext *sc;
2424
    AVIndexEntry *sample;
2425
    AVStream *st = NULL;
2426
    int ret;
2427
 retry:
2428
    sample = mov_find_next_sample(s, &st);
2429
    if (!sample) {
2430
        mov->found_mdat = 0;
2431
        if (!url_is_streamed(s->pb) ||
2432
            mov_read_default(mov, s->pb, (MOVAtom){ AV_RL32("root"), INT64_MAX }) < 0 ||
2433
            url_feof(s->pb))
2434
            return AVERROR_EOF;
2435
        dprintf(s, "read fragments, offset 0x%llx\n", url_ftell(s->pb));
2436
        goto retry;
2437
    }
2438
    sc = st->priv_data;
2439
    /* must be done just before reading, to avoid infinite loop on sample */
2440
    sc->current_sample++;
2441

    
2442
    if (st->discard != AVDISCARD_ALL) {
2443
        if (url_fseek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
2444
            av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n",
2445
                   sc->ffindex, sample->pos);
2446
            return -1;
2447
        }
2448
        ret = av_get_packet(sc->pb, pkt, sample->size);
2449
        if (ret < 0)
2450
            return ret;
2451
#if CONFIG_DV_DEMUXER
2452
        if (mov->dv_demux && sc->dv_audio_container) {
2453
            dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size);
2454
            av_free(pkt->data);
2455
            pkt->size = 0;
2456
            ret = dv_get_packet(mov->dv_demux, pkt);
2457
            if (ret < 0)
2458
                return ret;
2459
        }
2460
#endif
2461
    }
2462

    
2463
    pkt->stream_index = sc->ffindex;
2464
    pkt->dts = sample->timestamp;
2465
    if (sc->ctts_data) {
2466
        pkt->pts = pkt->dts + sc->dts_shift + sc->ctts_data[sc->ctts_index].duration;
2467
        /* update ctts context */
2468
        sc->ctts_sample++;
2469
        if (sc->ctts_index < sc->ctts_count &&
2470
            sc->ctts_data[sc->ctts_index].count == sc->ctts_sample) {
2471
            sc->ctts_index++;
2472
            sc->ctts_sample = 0;
2473
        }
2474
        if (sc->wrong_dts)
2475
            pkt->dts = AV_NOPTS_VALUE;
2476
    } else {
2477
        int64_t next_dts = (sc->current_sample < st->nb_index_entries) ?
2478
            st->index_entries[sc->current_sample].timestamp : st->duration;
2479
        pkt->duration = next_dts - pkt->dts;
2480
        pkt->pts = pkt->dts;
2481
    }
2482
    if (st->discard == AVDISCARD_ALL)
2483
        goto retry;
2484
    pkt->flags |= sample->flags & AVINDEX_KEYFRAME ? AV_PKT_FLAG_KEY : 0;
2485
    pkt->pos = sample->pos;
2486
    dprintf(s, "stream %d, pts %"PRId64", dts %"PRId64", pos 0x%"PRIx64", duration %d\n",
2487
            pkt->stream_index, pkt->pts, pkt->dts, pkt->pos, pkt->duration);
2488
    return 0;
2489
}
2490

    
2491
static int mov_seek_stream(AVFormatContext *s, AVStream *st, int64_t timestamp, int flags)
2492
{
2493
    MOVStreamContext *sc = st->priv_data;
2494
    int sample, time_sample;
2495
    int i;
2496

    
2497
    sample = av_index_search_timestamp(st, timestamp, flags);
2498
    dprintf(s, "stream %d, timestamp %"PRId64", sample %d\n", st->index, timestamp, sample);
2499
    if (sample < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp)
2500
        sample = 0;
2501
    if (sample < 0) /* not sure what to do */
2502
        return -1;
2503
    sc->current_sample = sample;
2504
    dprintf(s, "stream %d, found sample %d\n", st->index, sc->current_sample);
2505
    /* adjust ctts index */
2506
    if (sc->ctts_data) {
2507
        time_sample = 0;
2508
        for (i = 0; i < sc->ctts_count; i++) {
2509
            int next = time_sample + sc->ctts_data[i].count;
2510
            if (next > sc->current_sample) {
2511
                sc->ctts_index = i;
2512
                sc->ctts_sample = sc->current_sample - time_sample;
2513
                break;
2514
            }
2515
            time_sample = next;
2516
        }
2517
    }
2518
    return sample;
2519
}
2520

    
2521
static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
2522
{
2523
    AVStream *st;
2524
    int64_t seek_timestamp, timestamp;
2525
    int sample;
2526
    int i;
2527

    
2528
    if (stream_index >= s->nb_streams)
2529
        return -1;
2530
    if (sample_time < 0)
2531
        sample_time = 0;
2532

    
2533
    st = s->streams[stream_index];
2534
    sample = mov_seek_stream(s, st, sample_time, flags);
2535
    if (sample < 0)
2536
        return -1;
2537

    
2538
    /* adjust seek timestamp to found sample timestamp */
2539
    seek_timestamp = st->index_entries[sample].timestamp;
2540

    
2541
    for (i = 0; i < s->nb_streams; i++) {
2542
        st = s->streams[i];
2543
        if (stream_index == i)
2544
            continue;
2545

    
2546
        timestamp = av_rescale_q(seek_timestamp, s->streams[stream_index]->time_base, st->time_base);
2547
        mov_seek_stream(s, st, timestamp, flags);
2548
    }
2549
    return 0;
2550
}
2551

    
2552
static int mov_read_close(AVFormatContext *s)
2553
{
2554
    MOVContext *mov = s->priv_data;
2555
    int i, j;
2556

    
2557
    for (i = 0; i < s->nb_streams; i++) {
2558
        AVStream *st = s->streams[i];
2559
        MOVStreamContext *sc = st->priv_data;
2560

    
2561
        av_freep(&sc->ctts_data);
2562
        for (j = 0; j < sc->drefs_count; j++) {
2563
            av_freep(&sc->drefs[j].path);
2564
            av_freep(&sc->drefs[j].dir);
2565
        }
2566
        av_freep(&sc->drefs);
2567
        if (sc->pb && sc->pb != s->pb)
2568
            url_fclose(sc->pb);
2569

    
2570
        av_freep(&st->codec->palctrl);
2571
    }
2572

    
2573
    if (mov->dv_demux) {
2574
        for(i = 0; i < mov->dv_fctx->nb_streams; i++) {
2575
            av_freep(&mov->dv_fctx->streams[i]->codec);
2576
            av_freep(&mov->dv_fctx->streams[i]);
2577
        }
2578
        av_freep(&mov->dv_fctx);
2579
        av_freep(&mov->dv_demux);
2580
    }
2581

    
2582
    av_freep(&mov->trex_data);
2583

    
2584
    return 0;
2585
}
2586

    
2587
AVInputFormat mov_demuxer = {
2588
    "mov,mp4,m4a,3gp,3g2,mj2",
2589
    NULL_IF_CONFIG_SMALL("QuickTime/MPEG-4/Motion JPEG 2000 format"),
2590
    sizeof(MOVContext),
2591
    mov_probe,
2592
    mov_read_header,
2593
    mov_read_packet,
2594
    mov_read_close,
2595
    mov_read_seek,
2596
};