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ffmpeg / libavformat / mov.c @ 72415b2a

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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>
40
#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
45
 *
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 */
71
/* 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_set(&c->fc->metadata, "track", buf);
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,
101
    0x2020,0x00B0,0x00A2,0x00A3,0x00A7,0x2022,0x00B6,0x00DF,
102
    0x00AE,0x00A9,0x2122,0x00B4,0x00A8,0x2260,0x00C6,0x00D8,
103
    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 = "author";    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_set(&c->fc->metadata, key, str);
208
        if (*language && strcmp(language, "und")) {
209
            snprintf(key2, sizeof(key2), "%s-%s", key, language);
210
            av_metadata_set(&c->fc->metadata, key2, str);
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_default(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
223
{
224
    int64_t total_size = 0;
225
    MOVAtom a;
226
    int i;
227

    
228
    if (atom.size < 0)
229
        atom.size = INT64_MAX;
230
    while (total_size + 8 < atom.size && !url_feof(pb)) {
231
        int (*parse)(MOVContext*, ByteIOContext*, MOVAtom) = NULL;
232
        a.size = atom.size;
233
        a.type=0;
234
        if(atom.size >= 8) {
235
            a.size = get_be32(pb);
236
            a.type = get_le32(pb);
237
        }
238
        total_size += 8;
239
        dprintf(c->fc, "type: %08x  %.4s  sz: %"PRIx64"  %"PRIx64"   %"PRIx64"\n",
240
                a.type, (char*)&a.type, a.size, atom.size, total_size);
241
        if (a.size == 1) { /* 64 bit extended size */
242
            a.size = get_be64(pb) - 8;
243
            total_size += 8;
244
        }
245
        if (a.size == 0) {
246
            a.size = atom.size - total_size;
247
            if (a.size <= 8)
248
                break;
249
        }
250
        a.size -= 8;
251
        if(a.size < 0)
252
            break;
253
        a.size = FFMIN(a.size, atom.size - total_size);
254

    
255
        for (i = 0; mov_default_parse_table[i].type; i++)
256
            if (mov_default_parse_table[i].type == a.type) {
257
                parse = mov_default_parse_table[i].parse;
258
                break;
259
            }
260

    
261
        // container is user data
262
        if (!parse && (atom.type == MKTAG('u','d','t','a') ||
263
                       atom.type == MKTAG('i','l','s','t')))
264
            parse = mov_read_udta_string;
265

    
266
        if (!parse) { /* skip leaf atoms data */
267
            url_fskip(pb, a.size);
268
        } else {
269
            int64_t start_pos = url_ftell(pb);
270
            int64_t left;
271
            int err = parse(c, pb, a);
272
            if (err < 0)
273
                return err;
274
            if (c->found_moov && c->found_mdat &&
275
                (url_is_streamed(pb) || start_pos + a.size == url_fsize(pb)))
276
                return 0;
277
            left = a.size - url_ftell(pb) + start_pos;
278
            if (left > 0) /* skip garbage at atom end */
279
                url_fskip(pb, left);
280
        }
281

    
282
        total_size += a.size;
283
    }
284

    
285
    if (total_size < atom.size && atom.size < 0x7ffff)
286
        url_fskip(pb, atom.size - total_size);
287

    
288
    return 0;
289
}
290

    
291
static int mov_read_dref(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
292
{
293
    AVStream *st;
294
    MOVStreamContext *sc;
295
    int entries, i, j;
296

    
297
    if (c->fc->nb_streams < 1)
298
        return 0;
299
    st = c->fc->streams[c->fc->nb_streams-1];
300
    sc = st->priv_data;
301

    
302
    get_be32(pb); // version + flags
303
    entries = get_be32(pb);
304
    if (entries >= UINT_MAX / sizeof(*sc->drefs))
305
        return -1;
306
    sc->drefs = av_mallocz(entries * sizeof(*sc->drefs));
307
    if (!sc->drefs)
308
        return AVERROR(ENOMEM);
309
    sc->drefs_count = entries;
310

    
311
    for (i = 0; i < sc->drefs_count; i++) {
312
        MOVDref *dref = &sc->drefs[i];
313
        uint32_t size = get_be32(pb);
314
        int64_t next = url_ftell(pb) + size - 4;
315

    
316
        dref->type = get_le32(pb);
317
        get_be32(pb); // version + flags
318
        dprintf(c->fc, "type %.4s size %d\n", (char*)&dref->type, size);
319

    
320
        if (dref->type == MKTAG('a','l','i','s') && size > 150) {
321
            /* macintosh alias record */
322
            uint16_t volume_len, len;
323
            int16_t type;
324

    
325
            url_fskip(pb, 10);
326

    
327
            volume_len = get_byte(pb);
328
            volume_len = FFMIN(volume_len, 27);
329
            get_buffer(pb, dref->volume, 27);
330
            dref->volume[volume_len] = 0;
331
            av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", dref->volume, volume_len);
332

    
333
            url_fskip(pb, 12);
334

    
335
            len = get_byte(pb);
336
            len = FFMIN(len, 63);
337
            get_buffer(pb, dref->filename, 63);
338
            dref->filename[len] = 0;
339
            av_log(c->fc, AV_LOG_DEBUG, "filename %s, len %d\n", dref->filename, len);
340

    
341
            url_fskip(pb, 16);
342

    
343
            /* read next level up_from_alias/down_to_target */
344
            dref->nlvl_from = get_be16(pb);
345
            dref->nlvl_to   = get_be16(pb);
346
            av_log(c->fc, AV_LOG_DEBUG, "nlvl from %d, nlvl to %d\n",
347
                   dref->nlvl_from, dref->nlvl_to);
348

    
349
            url_fskip(pb, 16);
350

    
351
            for (type = 0; type != -1 && url_ftell(pb) < next; ) {
352
                type = get_be16(pb);
353
                len = get_be16(pb);
354
                av_log(c->fc, AV_LOG_DEBUG, "type %d, len %d\n", type, len);
355
                if (len&1)
356
                    len += 1;
357
                if (type == 2) { // absolute path
358
                    av_free(dref->path);
359
                    dref->path = av_mallocz(len+1);
360
                    if (!dref->path)
361
                        return AVERROR(ENOMEM);
362
                    get_buffer(pb, dref->path, len);
363
                    if (len > volume_len && !strncmp(dref->path, dref->volume, volume_len)) {
364
                        len -= volume_len;
365
                        memmove(dref->path, dref->path+volume_len, len);
366
                        dref->path[len] = 0;
367
                    }
368
                    for (j = 0; j < len; j++)
369
                        if (dref->path[j] == ':')
370
                            dref->path[j] = '/';
371
                    av_log(c->fc, AV_LOG_DEBUG, "path %s\n", dref->path);
372
                } else if (type == 0) { // directory name
373
                    av_free(dref->dir);
374
                    dref->dir = av_malloc(len+1);
375
                    if (!dref->dir)
376
                        return AVERROR(ENOMEM);
377
                    get_buffer(pb, dref->dir, len);
378
                    dref->dir[len] = 0;
379
                    for (j = 0; j < len; j++)
380
                        if (dref->dir[j] == ':')
381
                            dref->dir[j] = '/';
382
                    av_log(c->fc, AV_LOG_DEBUG, "dir %s\n", dref->dir);
383
                } else
384
                    url_fskip(pb, len);
385
            }
386
        }
387
        url_fseek(pb, next, SEEK_SET);
388
    }
389
    return 0;
390
}
391

    
392
static int mov_read_hdlr(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
393
{
394
    AVStream *st;
395
    uint32_t type;
396
    uint32_t ctype;
397

    
398
    if (c->fc->nb_streams < 1) // meta before first trak
399
        return 0;
400

    
401
    st = c->fc->streams[c->fc->nb_streams-1];
402

    
403
    get_byte(pb); /* version */
404
    get_be24(pb); /* flags */
405

    
406
    /* component type */
407
    ctype = get_le32(pb);
408
    type = get_le32(pb); /* component subtype */
409

    
410
    dprintf(c->fc, "ctype= %.4s (0x%08x)\n", (char*)&ctype, ctype);
411
    dprintf(c->fc, "stype= %.4s\n", (char*)&type);
412

    
413
    if     (type == MKTAG('v','i','d','e'))
414
        st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
415
    else if(type == MKTAG('s','o','u','n'))
416
        st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
417
    else if(type == MKTAG('m','1','a',' '))
418
        st->codec->codec_id = CODEC_ID_MP2;
419
    else if(type == MKTAG('s','u','b','p'))
420
        st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
421

    
422
    get_be32(pb); /* component  manufacture */
423
    get_be32(pb); /* component flags */
424
    get_be32(pb); /* component flags mask */
425

    
426
    return 0;
427
}
428

    
429
int ff_mp4_read_descr_len(ByteIOContext *pb)
430
{
431
    int len = 0;
432
    int count = 4;
433
    while (count--) {
434
        int c = get_byte(pb);
435
        len = (len << 7) | (c & 0x7f);
436
        if (!(c & 0x80))
437
            break;
438
    }
439
    return len;
440
}
441

    
442
static int mp4_read_descr(AVFormatContext *fc, ByteIOContext *pb, int *tag)
443
{
444
    int len;
445
    *tag = get_byte(pb);
446
    len = ff_mp4_read_descr_len(pb);
447
    dprintf(fc, "MPEG4 description: tag=0x%02x len=%d\n", *tag, len);
448
    return len;
449
}
450

    
451
#define MP4ESDescrTag                   0x03
452
#define MP4DecConfigDescrTag            0x04
453
#define MP4DecSpecificDescrTag          0x05
454

    
455
static const AVCodecTag mp4_audio_types[] = {
456
    { CODEC_ID_MP3ON4, AOT_PS   }, /* old mp3on4 draft */
457
    { CODEC_ID_MP3ON4, AOT_L1   }, /* layer 1 */
458
    { CODEC_ID_MP3ON4, AOT_L2   }, /* layer 2 */
459
    { CODEC_ID_MP3ON4, AOT_L3   }, /* layer 3 */
460
    { CODEC_ID_MP4ALS, AOT_ALS  }, /* MPEG-4 ALS */
461
    { CODEC_ID_NONE,   AOT_NULL },
462
};
463

    
464
int ff_mov_read_esds(AVFormatContext *fc, ByteIOContext *pb, MOVAtom atom)
465
{
466
    AVStream *st;
467
    int tag, len;
468

    
469
    if (fc->nb_streams < 1)
470
        return 0;
471
    st = fc->streams[fc->nb_streams-1];
472

    
473
    get_be32(pb); /* version + flags */
474
    len = mp4_read_descr(fc, pb, &tag);
475
    if (tag == MP4ESDescrTag) {
476
        get_be16(pb); /* ID */
477
        get_byte(pb); /* priority */
478
    } else
479
        get_be16(pb); /* ID */
480

    
481
    len = mp4_read_descr(fc, pb, &tag);
482
    if (tag == MP4DecConfigDescrTag) {
483
        int object_type_id = get_byte(pb);
484
        get_byte(pb); /* stream type */
485
        get_be24(pb); /* buffer size db */
486
        get_be32(pb); /* max bitrate */
487
        get_be32(pb); /* avg bitrate */
488

    
489
        st->codec->codec_id= ff_codec_get_id(ff_mp4_obj_type, object_type_id);
490
        dprintf(fc, "esds object type id 0x%02x\n", object_type_id);
491
        len = mp4_read_descr(fc, pb, &tag);
492
        if (tag == MP4DecSpecificDescrTag) {
493
            dprintf(fc, "Specific MPEG4 header len=%d\n", len);
494
            if((uint64_t)len > (1<<30))
495
                return -1;
496
            st->codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
497
            if (!st->codec->extradata)
498
                return AVERROR(ENOMEM);
499
            get_buffer(pb, st->codec->extradata, len);
500
            st->codec->extradata_size = len;
501
            if (st->codec->codec_id == CODEC_ID_AAC) {
502
                MPEG4AudioConfig cfg;
503
                ff_mpeg4audio_get_config(&cfg, st->codec->extradata,
504
                                         st->codec->extradata_size);
505
                st->codec->channels = cfg.channels;
506
                if (cfg.object_type == 29 && cfg.sampling_index < 3) // old mp3on4
507
                    st->codec->sample_rate = ff_mpa_freq_tab[cfg.sampling_index];
508
                else
509
                    st->codec->sample_rate = cfg.sample_rate; // ext sample rate ?
510
                dprintf(fc, "mp4a config channels %d obj %d ext obj %d "
511
                        "sample rate %d ext sample rate %d\n", st->codec->channels,
512
                        cfg.object_type, cfg.ext_object_type,
513
                        cfg.sample_rate, cfg.ext_sample_rate);
514
                if (!(st->codec->codec_id = ff_codec_get_id(mp4_audio_types,
515
                                                            cfg.object_type)))
516
                    st->codec->codec_id = CODEC_ID_AAC;
517
            }
518
        }
519
    }
520
    return 0;
521
}
522

    
523
static int mov_read_esds(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
524
{
525
    return ff_mov_read_esds(c->fc, pb, atom);
526
}
527

    
528
static int mov_read_pasp(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
529
{
530
    const int num = get_be32(pb);
531
    const int den = get_be32(pb);
532
    AVStream *st;
533

    
534
    if (c->fc->nb_streams < 1)
535
        return 0;
536
    st = c->fc->streams[c->fc->nb_streams-1];
537

    
538
    if (den != 0) {
539
        if ((st->sample_aspect_ratio.den != 1 || st->sample_aspect_ratio.num) && // default
540
            (den != st->sample_aspect_ratio.den || num != st->sample_aspect_ratio.num))
541
            av_log(c->fc, AV_LOG_WARNING,
542
                   "sample aspect ratio already set to %d:%d, overriding by 'pasp' atom\n",
543
                   st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
544
        st->sample_aspect_ratio.num = num;
545
        st->sample_aspect_ratio.den = den;
546
    }
547
    return 0;
548
}
549

    
550
/* this atom contains actual media data */
551
static int mov_read_mdat(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
552
{
553
    if(atom.size == 0) /* wrong one (MP4) */
554
        return 0;
555
    c->found_mdat=1;
556
    return 0; /* now go for moov */
557
}
558

    
559
/* read major brand, minor version and compatible brands and store them as metadata */
560
static int mov_read_ftyp(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
561
{
562
    uint32_t minor_ver;
563
    int comp_brand_size;
564
    char minor_ver_str[11]; /* 32 bit integer -> 10 digits + null */
565
    char* comp_brands_str;
566
    uint8_t type[5] = {0};
567

    
568
    get_buffer(pb, type, 4);
569
    if (strcmp(type, "qt  "))
570
        c->isom = 1;
571
    av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);
572
    av_metadata_set(&c->fc->metadata, "major_brand", type);
573
    minor_ver = get_be32(pb); /* minor version */
574
    snprintf(minor_ver_str, sizeof(minor_ver_str), "%d", minor_ver);
575
    av_metadata_set(&c->fc->metadata, "minor_version", minor_ver_str);
576

    
577
    comp_brand_size = atom.size - 8;
578
    if (comp_brand_size < 0)
579
        return -1;
580
    comp_brands_str = av_malloc(comp_brand_size + 1); /* Add null terminator */
581
    if (!comp_brands_str)
582
        return AVERROR(ENOMEM);
583
    get_buffer(pb, comp_brands_str, comp_brand_size);
584
    comp_brands_str[comp_brand_size] = 0;
585
    av_metadata_set(&c->fc->metadata, "compatible_brands", comp_brands_str);
586
    av_freep(&comp_brands_str);
587

    
588
    return 0;
589
}
590

    
591
/* this atom should contain all header atoms */
592
static int mov_read_moov(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
593
{
594
    if (mov_read_default(c, pb, atom) < 0)
595
        return -1;
596
    /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
597
    /* so we don't parse the whole file if over a network */
598
    c->found_moov=1;
599
    return 0; /* now go for mdat */
600
}
601

    
602
static int mov_read_moof(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
603
{
604
    c->fragment.moof_offset = url_ftell(pb) - 8;
605
    dprintf(c->fc, "moof offset %llx\n", c->fragment.moof_offset);
606
    return mov_read_default(c, pb, atom);
607
}
608

    
609
static int mov_read_mdhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
610
{
611
    AVStream *st;
612
    MOVStreamContext *sc;
613
    int version;
614
    char language[4] = {0};
615
    unsigned lang;
616

    
617
    if (c->fc->nb_streams < 1)
618
        return 0;
619
    st = c->fc->streams[c->fc->nb_streams-1];
620
    sc = st->priv_data;
621

    
622
    version = get_byte(pb);
623
    if (version > 1)
624
        return -1; /* unsupported */
625

    
626
    get_be24(pb); /* flags */
627
    if (version == 1) {
628
        get_be64(pb);
629
        get_be64(pb);
630
    } else {
631
        get_be32(pb); /* creation time */
632
        get_be32(pb); /* modification time */
633
    }
634

    
635
    sc->time_scale = get_be32(pb);
636
    st->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */
637

    
638
    lang = get_be16(pb); /* language */
639
    if (ff_mov_lang_to_iso639(lang, language))
640
        av_metadata_set(&st->metadata, "language", language);
641
    get_be16(pb); /* quality */
642

    
643
    return 0;
644
}
645

    
646
static int mov_read_mvhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
647
{
648
    int version = get_byte(pb); /* version */
649
    get_be24(pb); /* flags */
650

    
651
    if (version == 1) {
652
        get_be64(pb);
653
        get_be64(pb);
654
    } else {
655
        get_be32(pb); /* creation time */
656
        get_be32(pb); /* modification time */
657
    }
658
    c->time_scale = get_be32(pb); /* time scale */
659

    
660
    dprintf(c->fc, "time scale = %i\n", c->time_scale);
661

    
662
    c->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */
663
    get_be32(pb); /* preferred scale */
664

    
665
    get_be16(pb); /* preferred volume */
666

    
667
    url_fskip(pb, 10); /* reserved */
668

    
669
    url_fskip(pb, 36); /* display matrix */
670

    
671
    get_be32(pb); /* preview time */
672
    get_be32(pb); /* preview duration */
673
    get_be32(pb); /* poster time */
674
    get_be32(pb); /* selection time */
675
    get_be32(pb); /* selection duration */
676
    get_be32(pb); /* current time */
677
    get_be32(pb); /* next track ID */
678

    
679
    return 0;
680
}
681

    
682
static int mov_read_smi(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
683
{
684
    AVStream *st;
685

    
686
    if (c->fc->nb_streams < 1)
687
        return 0;
688
    st = c->fc->streams[c->fc->nb_streams-1];
689

    
690
    if((uint64_t)atom.size > (1<<30))
691
        return -1;
692

    
693
    // currently SVQ3 decoder expect full STSD header - so let's fake it
694
    // this should be fixed and just SMI header should be passed
695
    av_free(st->codec->extradata);
696
    st->codec->extradata = av_mallocz(atom.size + 0x5a + FF_INPUT_BUFFER_PADDING_SIZE);
697
    if (!st->codec->extradata)
698
        return AVERROR(ENOMEM);
699
    st->codec->extradata_size = 0x5a + atom.size;
700
    memcpy(st->codec->extradata, "SVQ3", 4); // fake
701
    get_buffer(pb, st->codec->extradata + 0x5a, atom.size);
702
    dprintf(c->fc, "Reading SMI %"PRId64"  %s\n", atom.size, st->codec->extradata + 0x5a);
703
    return 0;
704
}
705

    
706
static int mov_read_enda(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
707
{
708
    AVStream *st;
709
    int little_endian;
710

    
711
    if (c->fc->nb_streams < 1)
712
        return 0;
713
    st = c->fc->streams[c->fc->nb_streams-1];
714

    
715
    little_endian = get_be16(pb);
716
    dprintf(c->fc, "enda %d\n", little_endian);
717
    if (little_endian == 1) {
718
        switch (st->codec->codec_id) {
719
        case CODEC_ID_PCM_S24BE:
720
            st->codec->codec_id = CODEC_ID_PCM_S24LE;
721
            break;
722
        case CODEC_ID_PCM_S32BE:
723
            st->codec->codec_id = CODEC_ID_PCM_S32LE;
724
            break;
725
        case CODEC_ID_PCM_F32BE:
726
            st->codec->codec_id = CODEC_ID_PCM_F32LE;
727
            break;
728
        case CODEC_ID_PCM_F64BE:
729
            st->codec->codec_id = CODEC_ID_PCM_F64LE;
730
            break;
731
        default:
732
            break;
733
        }
734
    }
735
    return 0;
736
}
737

    
738
/* FIXME modify qdm2/svq3/h264 decoders to take full atom as extradata */
739
static int mov_read_extradata(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
740
{
741
    AVStream *st;
742
    uint64_t size;
743
    uint8_t *buf;
744

    
745
    if (c->fc->nb_streams < 1) // will happen with jp2 files
746
        return 0;
747
    st= c->fc->streams[c->fc->nb_streams-1];
748
    size= (uint64_t)st->codec->extradata_size + atom.size + 8 + FF_INPUT_BUFFER_PADDING_SIZE;
749
    if(size > INT_MAX || (uint64_t)atom.size > INT_MAX)
750
        return -1;
751
    buf= av_realloc(st->codec->extradata, size);
752
    if(!buf)
753
        return -1;
754
    st->codec->extradata= buf;
755
    buf+= st->codec->extradata_size;
756
    st->codec->extradata_size= size - FF_INPUT_BUFFER_PADDING_SIZE;
757
    AV_WB32(       buf    , atom.size + 8);
758
    AV_WL32(       buf + 4, atom.type);
759
    get_buffer(pb, buf + 8, atom.size);
760
    return 0;
761
}
762

    
763
static int mov_read_wave(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
764
{
765
    AVStream *st;
766

    
767
    if (c->fc->nb_streams < 1)
768
        return 0;
769
    st = c->fc->streams[c->fc->nb_streams-1];
770

    
771
    if((uint64_t)atom.size > (1<<30))
772
        return -1;
773

    
774
    if (st->codec->codec_id == CODEC_ID_QDM2) {
775
        // pass all frma atom to codec, needed at least for QDM2
776
        av_free(st->codec->extradata);
777
        st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
778
        if (!st->codec->extradata)
779
            return AVERROR(ENOMEM);
780
        st->codec->extradata_size = atom.size;
781
        get_buffer(pb, st->codec->extradata, atom.size);
782
    } else if (atom.size > 8) { /* to read frma, esds atoms */
783
        if (mov_read_default(c, pb, atom) < 0)
784
            return -1;
785
    } else
786
        url_fskip(pb, atom.size);
787
    return 0;
788
}
789

    
790
/**
791
 * This function reads atom content and puts data in extradata without tag
792
 * nor size unlike mov_read_extradata.
793
 */
794
static int mov_read_glbl(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
795
{
796
    AVStream *st;
797

    
798
    if (c->fc->nb_streams < 1)
799
        return 0;
800
    st = c->fc->streams[c->fc->nb_streams-1];
801

    
802
    if((uint64_t)atom.size > (1<<30))
803
        return -1;
804

    
805
    av_free(st->codec->extradata);
806
    st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE);
807
    if (!st->codec->extradata)
808
        return AVERROR(ENOMEM);
809
    st->codec->extradata_size = atom.size;
810
    get_buffer(pb, st->codec->extradata, atom.size);
811
    return 0;
812
}
813

    
814
static int mov_read_stco(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
815
{
816
    AVStream *st;
817
    MOVStreamContext *sc;
818
    unsigned int i, entries;
819

    
820
    if (c->fc->nb_streams < 1)
821
        return 0;
822
    st = c->fc->streams[c->fc->nb_streams-1];
823
    sc = st->priv_data;
824

    
825
    get_byte(pb); /* version */
826
    get_be24(pb); /* flags */
827

    
828
    entries = get_be32(pb);
829

    
830
    if(entries >= UINT_MAX/sizeof(int64_t))
831
        return -1;
832

    
833
    sc->chunk_offsets = av_malloc(entries * sizeof(int64_t));
834
    if (!sc->chunk_offsets)
835
        return AVERROR(ENOMEM);
836
    sc->chunk_count = entries;
837

    
838
    if      (atom.type == MKTAG('s','t','c','o'))
839
        for(i=0; i<entries; i++)
840
            sc->chunk_offsets[i] = get_be32(pb);
841
    else if (atom.type == MKTAG('c','o','6','4'))
842
        for(i=0; i<entries; i++)
843
            sc->chunk_offsets[i] = get_be64(pb);
844
    else
845
        return -1;
846

    
847
    return 0;
848
}
849

    
850
/**
851
 * Compute codec id for 'lpcm' tag.
852
 * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
853
 */
854
enum CodecID ff_mov_get_lpcm_codec_id(int bps, int flags)
855
{
856
    if (flags & 1) { // floating point
857
        if (flags & 2) { // big endian
858
            if      (bps == 32) return CODEC_ID_PCM_F32BE;
859
            else if (bps == 64) return CODEC_ID_PCM_F64BE;
860
        } else {
861
            if      (bps == 32) return CODEC_ID_PCM_F32LE;
862
            else if (bps == 64) return CODEC_ID_PCM_F64LE;
863
        }
864
    } else {
865
        if (flags & 2) {
866
            if      (bps == 8)
867
                // signed integer
868
                if (flags & 4)  return CODEC_ID_PCM_S8;
869
                else            return CODEC_ID_PCM_U8;
870
            else if (bps == 16) return CODEC_ID_PCM_S16BE;
871
            else if (bps == 24) return CODEC_ID_PCM_S24BE;
872
            else if (bps == 32) return CODEC_ID_PCM_S32BE;
873
        } else {
874
            if      (bps == 8)
875
                if (flags & 4)  return CODEC_ID_PCM_S8;
876
                else            return CODEC_ID_PCM_U8;
877
            else if (bps == 16) return CODEC_ID_PCM_S16LE;
878
            else if (bps == 24) return CODEC_ID_PCM_S24LE;
879
            else if (bps == 32) return CODEC_ID_PCM_S32LE;
880
        }
881
    }
882
    return CODEC_ID_NONE;
883
}
884

    
885
static int mov_read_stsd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
886
{
887
    AVStream *st;
888
    MOVStreamContext *sc;
889
    int j, entries, pseudo_stream_id;
890

    
891
    if (c->fc->nb_streams < 1)
892
        return 0;
893
    st = c->fc->streams[c->fc->nb_streams-1];
894
    sc = st->priv_data;
895

    
896
    get_byte(pb); /* version */
897
    get_be24(pb); /* flags */
898

    
899
    entries = get_be32(pb);
900

    
901
    for(pseudo_stream_id=0; pseudo_stream_id<entries; pseudo_stream_id++) {
902
        //Parsing Sample description table
903
        enum CodecID id;
904
        int dref_id = 1;
905
        MOVAtom a = { 0 };
906
        int64_t start_pos = url_ftell(pb);
907
        int size = get_be32(pb); /* size */
908
        uint32_t format = get_le32(pb); /* data format */
909

    
910
        if (size >= 16) {
911
            get_be32(pb); /* reserved */
912
            get_be16(pb); /* reserved */
913
            dref_id = get_be16(pb);
914
        }
915

    
916
        if (st->codec->codec_tag &&
917
            st->codec->codec_tag != format &&
918
            (c->fc->video_codec_id ? ff_codec_get_id(codec_movvideo_tags, format) != c->fc->video_codec_id
919
                                   : st->codec->codec_tag != MKTAG('j','p','e','g'))
920
           ){
921
            /* Multiple fourcc, we skip JPEG. This is not correct, we should
922
             * export it as a separate AVStream but this needs a few changes
923
             * in the MOV demuxer, patch welcome. */
924
            av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
925
            url_fskip(pb, size - (url_ftell(pb) - start_pos));
926
            continue;
927
        }
928
        sc->pseudo_stream_id = st->codec->codec_tag ? -1 : pseudo_stream_id;
929
        sc->dref_id= dref_id;
930

    
931
        st->codec->codec_tag = format;
932
        id = ff_codec_get_id(codec_movaudio_tags, format);
933
        if (id<=0 && ((format&0xFFFF) == 'm'+('s'<<8) || (format&0xFFFF) == 'T'+('S'<<8)))
934
            id = ff_codec_get_id(ff_codec_wav_tags, bswap_32(format)&0xFFFF);
935

    
936
        if (st->codec->codec_type != AVMEDIA_TYPE_VIDEO && id > 0) {
937
            st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
938
        } else if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO && /* do not overwrite codec type */
939
                   format && format != MKTAG('m','p','4','s')) { /* skip old asf mpeg4 tag */
940
            id = ff_codec_get_id(codec_movvideo_tags, format);
941
            if (id <= 0)
942
                id = ff_codec_get_id(ff_codec_bmp_tags, format);
943
            if (id > 0)
944
                st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
945
            else if(st->codec->codec_type == AVMEDIA_TYPE_DATA){
946
                id = ff_codec_get_id(ff_codec_movsubtitle_tags, format);
947
                if(id > 0)
948
                    st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
949
            }
950
        }
951

    
952
        dprintf(c->fc, "size=%d 4CC= %c%c%c%c codec_type=%d\n", size,
953
                (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff,
954
                (format >> 24) & 0xff, st->codec->codec_type);
955

    
956
        if(st->codec->codec_type==AVMEDIA_TYPE_VIDEO) {
957
            unsigned int color_depth, len;
958
            int color_greyscale;
959

    
960
            st->codec->codec_id = id;
961
            get_be16(pb); /* version */
962
            get_be16(pb); /* revision level */
963
            get_be32(pb); /* vendor */
964
            get_be32(pb); /* temporal quality */
965
            get_be32(pb); /* spatial quality */
966

    
967
            st->codec->width = get_be16(pb); /* width */
968
            st->codec->height = get_be16(pb); /* height */
969

    
970
            get_be32(pb); /* horiz resolution */
971
            get_be32(pb); /* vert resolution */
972
            get_be32(pb); /* data size, always 0 */
973
            get_be16(pb); /* frames per samples */
974

    
975
            len = get_byte(pb); /* codec name, pascal string */
976
            if (len > 31)
977
                len = 31;
978
            mov_read_mac_string(c, pb, len, st->codec->codec_name, 32);
979
            if (len < 31)
980
                url_fskip(pb, 31 - len);
981
            /* codec_tag YV12 triggers an UV swap in rawdec.c */
982
            if (!memcmp(st->codec->codec_name, "Planar Y'CbCr 8-bit 4:2:0", 25))
983
                st->codec->codec_tag=MKTAG('I', '4', '2', '0');
984

    
985
            st->codec->bits_per_coded_sample = get_be16(pb); /* depth */
986
            st->codec->color_table_id = get_be16(pb); /* colortable id */
987
            dprintf(c->fc, "depth %d, ctab id %d\n",
988
                   st->codec->bits_per_coded_sample, st->codec->color_table_id);
989
            /* figure out the palette situation */
990
            color_depth = st->codec->bits_per_coded_sample & 0x1F;
991
            color_greyscale = st->codec->bits_per_coded_sample & 0x20;
992

    
993
            /* if the depth is 2, 4, or 8 bpp, file is palettized */
994
            if ((color_depth == 2) || (color_depth == 4) ||
995
                (color_depth == 8)) {
996
                /* for palette traversal */
997
                unsigned int color_start, color_count, color_end;
998
                unsigned char r, g, b;
999

    
1000
                st->codec->palctrl = av_malloc(sizeof(*st->codec->palctrl));
1001
                if (color_greyscale) {
1002
                    int color_index, color_dec;
1003
                    /* compute the greyscale palette */
1004
                    st->codec->bits_per_coded_sample = color_depth;
1005
                    color_count = 1 << color_depth;
1006
                    color_index = 255;
1007
                    color_dec = 256 / (color_count - 1);
1008
                    for (j = 0; j < color_count; j++) {
1009
                        r = g = b = color_index;
1010
                        st->codec->palctrl->palette[j] =
1011
                            (r << 16) | (g << 8) | (b);
1012
                        color_index -= color_dec;
1013
                        if (color_index < 0)
1014
                            color_index = 0;
1015
                    }
1016
                } else if (st->codec->color_table_id) {
1017
                    const uint8_t *color_table;
1018
                    /* if flag bit 3 is set, use the default palette */
1019
                    color_count = 1 << color_depth;
1020
                    if (color_depth == 2)
1021
                        color_table = ff_qt_default_palette_4;
1022
                    else if (color_depth == 4)
1023
                        color_table = ff_qt_default_palette_16;
1024
                    else
1025
                        color_table = ff_qt_default_palette_256;
1026

    
1027
                    for (j = 0; j < color_count; j++) {
1028
                        r = color_table[j * 3 + 0];
1029
                        g = color_table[j * 3 + 1];
1030
                        b = color_table[j * 3 + 2];
1031
                        st->codec->palctrl->palette[j] =
1032
                            (r << 16) | (g << 8) | (b);
1033
                    }
1034
                } else {
1035
                    /* load the palette from the file */
1036
                    color_start = get_be32(pb);
1037
                    color_count = get_be16(pb);
1038
                    color_end = get_be16(pb);
1039
                    if ((color_start <= 255) &&
1040
                        (color_end <= 255)) {
1041
                        for (j = color_start; j <= color_end; j++) {
1042
                            /* each R, G, or B component is 16 bits;
1043
                             * only use the top 8 bits; skip alpha bytes
1044
                             * up front */
1045
                            get_byte(pb);
1046
                            get_byte(pb);
1047
                            r = get_byte(pb);
1048
                            get_byte(pb);
1049
                            g = get_byte(pb);
1050
                            get_byte(pb);
1051
                            b = get_byte(pb);
1052
                            get_byte(pb);
1053
                            st->codec->palctrl->palette[j] =
1054
                                (r << 16) | (g << 8) | (b);
1055
                        }
1056
                    }
1057
                }
1058
                st->codec->palctrl->palette_changed = 1;
1059
            }
1060
        } else if(st->codec->codec_type==AVMEDIA_TYPE_AUDIO) {
1061
            int bits_per_sample, flags;
1062
            uint16_t version = get_be16(pb);
1063

    
1064
            st->codec->codec_id = id;
1065
            get_be16(pb); /* revision level */
1066
            get_be32(pb); /* vendor */
1067

    
1068
            st->codec->channels = get_be16(pb);             /* channel count */
1069
            dprintf(c->fc, "audio channels %d\n", st->codec->channels);
1070
            st->codec->bits_per_coded_sample = get_be16(pb);      /* sample size */
1071

    
1072
            sc->audio_cid = get_be16(pb);
1073
            get_be16(pb); /* packet size = 0 */
1074

    
1075
            st->codec->sample_rate = ((get_be32(pb) >> 16));
1076

    
1077
            //Read QT version 1 fields. In version 0 these do not exist.
1078
            dprintf(c->fc, "version =%d, isom =%d\n",version,c->isom);
1079
            if(!c->isom) {
1080
                if(version==1) {
1081
                    sc->samples_per_frame = get_be32(pb);
1082
                    get_be32(pb); /* bytes per packet */
1083
                    sc->bytes_per_frame = get_be32(pb);
1084
                    get_be32(pb); /* bytes per sample */
1085
                } else if(version==2) {
1086
                    get_be32(pb); /* sizeof struct only */
1087
                    st->codec->sample_rate = av_int2dbl(get_be64(pb)); /* float 64 */
1088
                    st->codec->channels = get_be32(pb);
1089
                    get_be32(pb); /* always 0x7F000000 */
1090
                    st->codec->bits_per_coded_sample = get_be32(pb); /* bits per channel if sound is uncompressed */
1091
                    flags = get_be32(pb); /* lpcm format specific flag */
1092
                    sc->bytes_per_frame = get_be32(pb); /* bytes per audio packet if constant */
1093
                    sc->samples_per_frame = get_be32(pb); /* lpcm frames per audio packet if constant */
1094
                    if (format == MKTAG('l','p','c','m'))
1095
                        st->codec->codec_id = ff_mov_get_lpcm_codec_id(st->codec->bits_per_coded_sample, flags);
1096
                }
1097
            }
1098

    
1099
            switch (st->codec->codec_id) {
1100
            case CODEC_ID_PCM_S8:
1101
            case CODEC_ID_PCM_U8:
1102
                if (st->codec->bits_per_coded_sample == 16)
1103
                    st->codec->codec_id = CODEC_ID_PCM_S16BE;
1104
                break;
1105
            case CODEC_ID_PCM_S16LE:
1106
            case CODEC_ID_PCM_S16BE:
1107
                if (st->codec->bits_per_coded_sample == 8)
1108
                    st->codec->codec_id = CODEC_ID_PCM_S8;
1109
                else if (st->codec->bits_per_coded_sample == 24)
1110
                    st->codec->codec_id =
1111
                        st->codec->codec_id == CODEC_ID_PCM_S16BE ?
1112
                        CODEC_ID_PCM_S24BE : CODEC_ID_PCM_S24LE;
1113
                break;
1114
            /* set values for old format before stsd version 1 appeared */
1115
            case CODEC_ID_MACE3:
1116
                sc->samples_per_frame = 6;
1117
                sc->bytes_per_frame = 2*st->codec->channels;
1118
                break;
1119
            case CODEC_ID_MACE6:
1120
                sc->samples_per_frame = 6;
1121
                sc->bytes_per_frame = 1*st->codec->channels;
1122
                break;
1123
            case CODEC_ID_ADPCM_IMA_QT:
1124
                sc->samples_per_frame = 64;
1125
                sc->bytes_per_frame = 34*st->codec->channels;
1126
                break;
1127
            case CODEC_ID_GSM:
1128
                sc->samples_per_frame = 160;
1129
                sc->bytes_per_frame = 33;
1130
                break;
1131
            default:
1132
                break;
1133
            }
1134

    
1135
            bits_per_sample = av_get_bits_per_sample(st->codec->codec_id);
1136
            if (bits_per_sample) {
1137
                st->codec->bits_per_coded_sample = bits_per_sample;
1138
                sc->sample_size = (bits_per_sample >> 3) * st->codec->channels;
1139
            }
1140
        } else if(st->codec->codec_type==AVMEDIA_TYPE_SUBTITLE){
1141
            // ttxt stsd contains display flags, justification, background
1142
            // color, fonts, and default styles, so fake an atom to read it
1143
            MOVAtom fake_atom = { .size = size - (url_ftell(pb) - start_pos) };
1144
            if (format != AV_RL32("mp4s")) // mp4s contains a regular esds atom
1145
                mov_read_glbl(c, pb, fake_atom);
1146
            st->codec->codec_id= id;
1147
            st->codec->width = sc->width;
1148
            st->codec->height = sc->height;
1149
        } else {
1150
            /* other codec type, just skip (rtp, mp4s, tmcd ...) */
1151
            url_fskip(pb, size - (url_ftell(pb) - start_pos));
1152
        }
1153
        /* this will read extra atoms at the end (wave, alac, damr, avcC, SMI ...) */
1154
        a.size = size - (url_ftell(pb) - start_pos);
1155
        if (a.size > 8) {
1156
            if (mov_read_default(c, pb, a) < 0)
1157
                return -1;
1158
        } else if (a.size > 0)
1159
            url_fskip(pb, a.size);
1160
    }
1161

    
1162
    if(st->codec->codec_type==AVMEDIA_TYPE_AUDIO && st->codec->sample_rate==0 && sc->time_scale>1)
1163
        st->codec->sample_rate= sc->time_scale;
1164

    
1165
    /* special codec parameters handling */
1166
    switch (st->codec->codec_id) {
1167
#if CONFIG_DV_DEMUXER
1168
    case CODEC_ID_DVAUDIO:
1169
        c->dv_fctx = avformat_alloc_context();
1170
        c->dv_demux = dv_init_demux(c->dv_fctx);
1171
        if (!c->dv_demux) {
1172
            av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
1173
            return -1;
1174
        }
1175
        sc->dv_audio_container = 1;
1176
        st->codec->codec_id = CODEC_ID_PCM_S16LE;
1177
        break;
1178
#endif
1179
    /* no ifdef since parameters are always those */
1180
    case CODEC_ID_QCELP:
1181
        // force sample rate for qcelp when not stored in mov
1182
        if (st->codec->codec_tag != MKTAG('Q','c','l','p'))
1183
            st->codec->sample_rate = 8000;
1184
        st->codec->frame_size= 160;
1185
        st->codec->channels= 1; /* really needed */
1186
        break;
1187
    case CODEC_ID_AMR_NB:
1188
    case CODEC_ID_AMR_WB:
1189
        st->codec->frame_size= sc->samples_per_frame;
1190
        st->codec->channels= 1; /* really needed */
1191
        /* force sample rate for amr, stsd in 3gp does not store sample rate */
1192
        if (st->codec->codec_id == CODEC_ID_AMR_NB)
1193
            st->codec->sample_rate = 8000;
1194
        else if (st->codec->codec_id == CODEC_ID_AMR_WB)
1195
            st->codec->sample_rate = 16000;
1196
        break;
1197
    case CODEC_ID_MP2:
1198
    case CODEC_ID_MP3:
1199
        st->codec->codec_type = AVMEDIA_TYPE_AUDIO; /* force type after stsd for m1a hdlr */
1200
        st->need_parsing = AVSTREAM_PARSE_FULL;
1201
        break;
1202
    case CODEC_ID_GSM:
1203
    case CODEC_ID_ADPCM_MS:
1204
    case CODEC_ID_ADPCM_IMA_WAV:
1205
        st->codec->block_align = sc->bytes_per_frame;
1206
        break;
1207
    case CODEC_ID_ALAC:
1208
        if (st->codec->extradata_size == 36) {
1209
            st->codec->frame_size = AV_RB32(st->codec->extradata+12);
1210
            st->codec->channels   = AV_RB8 (st->codec->extradata+21);
1211
        }
1212
        break;
1213
    default:
1214
        break;
1215
    }
1216

    
1217
    return 0;
1218
}
1219

    
1220
static int mov_read_stsc(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1221
{
1222
    AVStream *st;
1223
    MOVStreamContext *sc;
1224
    unsigned int i, entries;
1225

    
1226
    if (c->fc->nb_streams < 1)
1227
        return 0;
1228
    st = c->fc->streams[c->fc->nb_streams-1];
1229
    sc = st->priv_data;
1230

    
1231
    get_byte(pb); /* version */
1232
    get_be24(pb); /* flags */
1233

    
1234
    entries = get_be32(pb);
1235

    
1236
    dprintf(c->fc, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);
1237

    
1238
    if(entries >= UINT_MAX / sizeof(*sc->stsc_data))
1239
        return -1;
1240
    sc->stsc_data = av_malloc(entries * sizeof(*sc->stsc_data));
1241
    if (!sc->stsc_data)
1242
        return AVERROR(ENOMEM);
1243
    sc->stsc_count = entries;
1244

    
1245
    for(i=0; i<entries; i++) {
1246
        sc->stsc_data[i].first = get_be32(pb);
1247
        sc->stsc_data[i].count = get_be32(pb);
1248
        sc->stsc_data[i].id = get_be32(pb);
1249
    }
1250
    return 0;
1251
}
1252

    
1253
static int mov_read_stps(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1254
{
1255
    AVStream *st;
1256
    MOVStreamContext *sc;
1257
    unsigned i, entries;
1258

    
1259
    if (c->fc->nb_streams < 1)
1260
        return 0;
1261
    st = c->fc->streams[c->fc->nb_streams-1];
1262
    sc = st->priv_data;
1263

    
1264
    get_be32(pb); // version + flags
1265

    
1266
    entries = get_be32(pb);
1267
    if (entries >= UINT_MAX / sizeof(*sc->stps_data))
1268
        return -1;
1269
    sc->stps_data = av_malloc(entries * sizeof(*sc->stps_data));
1270
    if (!sc->stps_data)
1271
        return AVERROR(ENOMEM);
1272
    sc->stps_count = entries;
1273

    
1274
    for (i = 0; i < entries; i++) {
1275
        sc->stps_data[i] = get_be32(pb);
1276
        //dprintf(c->fc, "stps %d\n", sc->stps_data[i]);
1277
    }
1278

    
1279
    return 0;
1280
}
1281

    
1282
static int mov_read_stss(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1283
{
1284
    AVStream *st;
1285
    MOVStreamContext *sc;
1286
    unsigned int i, entries;
1287

    
1288
    if (c->fc->nb_streams < 1)
1289
        return 0;
1290
    st = c->fc->streams[c->fc->nb_streams-1];
1291
    sc = st->priv_data;
1292

    
1293
    get_byte(pb); /* version */
1294
    get_be24(pb); /* flags */
1295

    
1296
    entries = get_be32(pb);
1297

    
1298
    dprintf(c->fc, "keyframe_count = %d\n", entries);
1299

    
1300
    if(entries >= UINT_MAX / sizeof(int))
1301
        return -1;
1302
    sc->keyframes = av_malloc(entries * sizeof(int));
1303
    if (!sc->keyframes)
1304
        return AVERROR(ENOMEM);
1305
    sc->keyframe_count = entries;
1306

    
1307
    for(i=0; i<entries; i++) {
1308
        sc->keyframes[i] = get_be32(pb);
1309
        //dprintf(c->fc, "keyframes[]=%d\n", sc->keyframes[i]);
1310
    }
1311
    return 0;
1312
}
1313

    
1314
static int mov_read_stsz(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1315
{
1316
    AVStream *st;
1317
    MOVStreamContext *sc;
1318
    unsigned int i, entries, sample_size, field_size, num_bytes;
1319
    GetBitContext gb;
1320
    unsigned char* buf;
1321

    
1322
    if (c->fc->nb_streams < 1)
1323
        return 0;
1324
    st = c->fc->streams[c->fc->nb_streams-1];
1325
    sc = st->priv_data;
1326

    
1327
    get_byte(pb); /* version */
1328
    get_be24(pb); /* flags */
1329

    
1330
    if (atom.type == MKTAG('s','t','s','z')) {
1331
        sample_size = get_be32(pb);
1332
        if (!sc->sample_size) /* do not overwrite value computed in stsd */
1333
            sc->sample_size = sample_size;
1334
        field_size = 32;
1335
    } else {
1336
        sample_size = 0;
1337
        get_be24(pb); /* reserved */
1338
        field_size = get_byte(pb);
1339
    }
1340
    entries = get_be32(pb);
1341

    
1342
    dprintf(c->fc, "sample_size = %d sample_count = %d\n", sc->sample_size, entries);
1343

    
1344
    sc->sample_count = entries;
1345
    if (sample_size)
1346
        return 0;
1347

    
1348
    if (field_size != 4 && field_size != 8 && field_size != 16 && field_size != 32) {
1349
        av_log(c->fc, AV_LOG_ERROR, "Invalid sample field size %d\n", field_size);
1350
        return -1;
1351
    }
1352

    
1353
    if (entries >= UINT_MAX / sizeof(int) || entries >= (UINT_MAX - 4) / field_size)
1354
        return -1;
1355
    sc->sample_sizes = av_malloc(entries * sizeof(int));
1356
    if (!sc->sample_sizes)
1357
        return AVERROR(ENOMEM);
1358

    
1359
    num_bytes = (entries*field_size+4)>>3;
1360

    
1361
    buf = av_malloc(num_bytes+FF_INPUT_BUFFER_PADDING_SIZE);
1362
    if (!buf) {
1363
        av_freep(&sc->sample_sizes);
1364
        return AVERROR(ENOMEM);
1365
    }
1366

    
1367
    if (get_buffer(pb, buf, num_bytes) < num_bytes) {
1368
        av_freep(&sc->sample_sizes);
1369
        av_free(buf);
1370
        return -1;
1371
    }
1372

    
1373
    init_get_bits(&gb, buf, 8*num_bytes);
1374

    
1375
    for(i=0; i<entries; i++)
1376
        sc->sample_sizes[i] = get_bits_long(&gb, field_size);
1377

    
1378
    av_free(buf);
1379
    return 0;
1380
}
1381

    
1382
static int mov_read_stts(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1383
{
1384
    AVStream *st;
1385
    MOVStreamContext *sc;
1386
    unsigned int i, entries;
1387
    int64_t duration=0;
1388
    int64_t total_sample_count=0;
1389

    
1390
    if (c->fc->nb_streams < 1)
1391
        return 0;
1392
    st = c->fc->streams[c->fc->nb_streams-1];
1393
    sc = st->priv_data;
1394

    
1395
    get_byte(pb); /* version */
1396
    get_be24(pb); /* flags */
1397
    entries = get_be32(pb);
1398

    
1399
    dprintf(c->fc, "track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries);
1400

    
1401
    if(entries >= UINT_MAX / sizeof(*sc->stts_data))
1402
        return -1;
1403
    sc->stts_data = av_malloc(entries * sizeof(*sc->stts_data));
1404
    if (!sc->stts_data)
1405
        return AVERROR(ENOMEM);
1406
    sc->stts_count = entries;
1407

    
1408
    for(i=0; i<entries; i++) {
1409
        int sample_duration;
1410
        int sample_count;
1411

    
1412
        sample_count=get_be32(pb);
1413
        sample_duration = get_be32(pb);
1414
        sc->stts_data[i].count= sample_count;
1415
        sc->stts_data[i].duration= sample_duration;
1416

    
1417
        dprintf(c->fc, "sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);
1418

    
1419
        duration+=(int64_t)sample_duration*sample_count;
1420
        total_sample_count+=sample_count;
1421
    }
1422

    
1423
    st->nb_frames= total_sample_count;
1424
    if(duration)
1425
        st->duration= duration;
1426
    return 0;
1427
}
1428

    
1429
static int mov_read_ctts(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1430
{
1431
    AVStream *st;
1432
    MOVStreamContext *sc;
1433
    unsigned int i, entries;
1434

    
1435
    if (c->fc->nb_streams < 1)
1436
        return 0;
1437
    st = c->fc->streams[c->fc->nb_streams-1];
1438
    sc = st->priv_data;
1439

    
1440
    get_byte(pb); /* version */
1441
    get_be24(pb); /* flags */
1442
    entries = get_be32(pb);
1443

    
1444
    dprintf(c->fc, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);
1445

    
1446
    if(entries >= UINT_MAX / sizeof(*sc->ctts_data))
1447
        return -1;
1448
    sc->ctts_data = av_malloc(entries * sizeof(*sc->ctts_data));
1449
    if (!sc->ctts_data)
1450
        return AVERROR(ENOMEM);
1451
    sc->ctts_count = entries;
1452

    
1453
    for(i=0; i<entries; i++) {
1454
        int count    =get_be32(pb);
1455
        int duration =get_be32(pb);
1456

    
1457
        sc->ctts_data[i].count   = count;
1458
        sc->ctts_data[i].duration= duration;
1459
        if (duration < 0)
1460
            sc->dts_shift = FFMAX(sc->dts_shift, -duration);
1461
    }
1462

    
1463
    dprintf(c->fc, "dts shift %d\n", sc->dts_shift);
1464

    
1465
    return 0;
1466
}
1467

    
1468
static void mov_build_index(MOVContext *mov, AVStream *st)
1469
{
1470
    MOVStreamContext *sc = st->priv_data;
1471
    int64_t current_offset;
1472
    int64_t current_dts = 0;
1473
    unsigned int stts_index = 0;
1474
    unsigned int stsc_index = 0;
1475
    unsigned int stss_index = 0;
1476
    unsigned int stps_index = 0;
1477
    unsigned int i, j;
1478
    uint64_t stream_size = 0;
1479

    
1480
    /* adjust first dts according to edit list */
1481
    if (sc->time_offset) {
1482
        int rescaled = sc->time_offset < 0 ? av_rescale(sc->time_offset, sc->time_scale, mov->time_scale) : sc->time_offset;
1483
        current_dts = -rescaled;
1484
        if (sc->ctts_data && sc->ctts_data[0].duration / sc->stts_data[0].duration > 16) {
1485
            /* more than 16 frames delay, dts are likely wrong
1486
               this happens with files created by iMovie */
1487
            sc->wrong_dts = 1;
1488
            st->codec->has_b_frames = 1;
1489
        }
1490
    }
1491

    
1492
    /* only use old uncompressed audio chunk demuxing when stts specifies it */
1493
    if (!(st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
1494
          sc->stts_count == 1 && sc->stts_data[0].duration == 1)) {
1495
        unsigned int current_sample = 0;
1496
        unsigned int stts_sample = 0;
1497
        unsigned int sample_size;
1498
        unsigned int distance = 0;
1499
        int key_off = sc->keyframes && sc->keyframes[0] == 1;
1500

    
1501
        current_dts -= sc->dts_shift;
1502

    
1503
        if (sc->sample_count >= UINT_MAX / sizeof(*st->index_entries))
1504
            return;
1505
        st->index_entries = av_malloc(sc->sample_count*sizeof(*st->index_entries));
1506
        if (!st->index_entries)
1507
            return;
1508
        st->index_entries_allocated_size = sc->sample_count*sizeof(*st->index_entries);
1509

    
1510
        for (i = 0; i < sc->chunk_count; i++) {
1511
            current_offset = sc->chunk_offsets[i];
1512
            if (stsc_index + 1 < sc->stsc_count &&
1513
                i + 1 == sc->stsc_data[stsc_index + 1].first)
1514
                stsc_index++;
1515
            for (j = 0; j < sc->stsc_data[stsc_index].count; j++) {
1516
                int keyframe = 0;
1517
                if (current_sample >= sc->sample_count) {
1518
                    av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
1519
                    return;
1520
                }
1521

    
1522
                if (!sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index]) {
1523
                    keyframe = 1;
1524
                    if (stss_index + 1 < sc->keyframe_count)
1525
                        stss_index++;
1526
                } else if (sc->stps_count && current_sample+key_off == sc->stps_data[stps_index]) {
1527
                    keyframe = 1;
1528
                    if (stps_index + 1 < sc->stps_count)
1529
                        stps_index++;
1530
                }
1531
                if (keyframe)
1532
                    distance = 0;
1533
                sample_size = sc->sample_size > 0 ? sc->sample_size : sc->sample_sizes[current_sample];
1534
                if(sc->pseudo_stream_id == -1 ||
1535
                   sc->stsc_data[stsc_index].id - 1 == sc->pseudo_stream_id) {
1536
                    AVIndexEntry *e = &st->index_entries[st->nb_index_entries++];
1537
                    e->pos = current_offset;
1538
                    e->timestamp = current_dts;
1539
                    e->size = sample_size;
1540
                    e->min_distance = distance;
1541
                    e->flags = keyframe ? AVINDEX_KEYFRAME : 0;
1542
                    dprintf(mov->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
1543
                            "size %d, distance %d, keyframe %d\n", st->index, current_sample,
1544
                            current_offset, current_dts, sample_size, distance, keyframe);
1545
                }
1546

    
1547
                current_offset += sample_size;
1548
                stream_size += sample_size;
1549
                current_dts += sc->stts_data[stts_index].duration;
1550
                distance++;
1551
                stts_sample++;
1552
                current_sample++;
1553
                if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) {
1554
                    stts_sample = 0;
1555
                    stts_index++;
1556
                }
1557
            }
1558
        }
1559
        if (st->duration > 0)
1560
            st->codec->bit_rate = stream_size*8*sc->time_scale/st->duration;
1561
    } else {
1562
        unsigned chunk_samples, total = 0;
1563

    
1564
        // compute total chunk count
1565
        for (i = 0; i < sc->stsc_count; i++) {
1566
            unsigned count, chunk_count;
1567

    
1568
            chunk_samples = sc->stsc_data[i].count;
1569
            if (sc->samples_per_frame && chunk_samples % sc->samples_per_frame) {
1570
                av_log(mov->fc, AV_LOG_ERROR, "error unaligned chunk\n");
1571
                return;
1572
            }
1573

    
1574
            if (sc->samples_per_frame >= 160) { // gsm
1575
                count = chunk_samples / sc->samples_per_frame;
1576
            } else if (sc->samples_per_frame > 1) {
1577
                unsigned samples = (1024/sc->samples_per_frame)*sc->samples_per_frame;
1578
                count = (chunk_samples+samples-1) / samples;
1579
            } else {
1580
                count = (chunk_samples+1023) / 1024;
1581
            }
1582

    
1583
            if (i < sc->stsc_count - 1)
1584
                chunk_count = sc->stsc_data[i+1].first - sc->stsc_data[i].first;
1585
            else
1586
                chunk_count = sc->chunk_count - (sc->stsc_data[i].first - 1);
1587
            total += chunk_count * count;
1588
        }
1589

    
1590
        dprintf(mov->fc, "chunk count %d\n", total);
1591
        if (total >= UINT_MAX / sizeof(*st->index_entries))
1592
            return;
1593
        st->index_entries = av_malloc(total*sizeof(*st->index_entries));
1594
        if (!st->index_entries)
1595
            return;
1596
        st->index_entries_allocated_size = total*sizeof(*st->index_entries);
1597

    
1598
        // populate index
1599
        for (i = 0; i < sc->chunk_count; i++) {
1600
            current_offset = sc->chunk_offsets[i];
1601
            if (stsc_index + 1 < sc->stsc_count &&
1602
                i + 1 == sc->stsc_data[stsc_index + 1].first)
1603
                stsc_index++;
1604
            chunk_samples = sc->stsc_data[stsc_index].count;
1605

    
1606
            while (chunk_samples > 0) {
1607
                AVIndexEntry *e;
1608
                unsigned size, samples;
1609

    
1610
                if (sc->samples_per_frame >= 160) { // gsm
1611
                    samples = sc->samples_per_frame;
1612
                    size = sc->bytes_per_frame;
1613
                } else {
1614
                    if (sc->samples_per_frame > 1) {
1615
                        samples = FFMIN((1024 / sc->samples_per_frame)*
1616
                                        sc->samples_per_frame, chunk_samples);
1617
                        size = (samples / sc->samples_per_frame) * sc->bytes_per_frame;
1618
                    } else {
1619
                        samples = FFMIN(1024, chunk_samples);
1620
                        size = samples * sc->sample_size;
1621
                    }
1622
                }
1623

    
1624
                if (st->nb_index_entries >= total) {
1625
                    av_log(mov->fc, AV_LOG_ERROR, "wrong chunk count %d\n", total);
1626
                    return;
1627
                }
1628
                e = &st->index_entries[st->nb_index_entries++];
1629
                e->pos = current_offset;
1630
                e->timestamp = current_dts;
1631
                e->size = size;
1632
                e->min_distance = 0;
1633
                e->flags = AVINDEX_KEYFRAME;
1634
                dprintf(mov->fc, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", "
1635
                        "size %d, duration %d\n", st->index, i, current_offset, current_dts,
1636
                        size, samples);
1637

    
1638
                current_offset += size;
1639
                current_dts += samples;
1640
                chunk_samples -= samples;
1641
            }
1642
        }
1643
    }
1644
}
1645

    
1646
static int mov_open_dref(ByteIOContext **pb, char *src, MOVDref *ref)
1647
{
1648
    /* try relative path, we do not try the absolute because it can leak information about our
1649
       system to an attacker */
1650
    if (ref->nlvl_to > 0 && ref->nlvl_from > 0) {
1651
        char filename[1024];
1652
        char *src_path;
1653
        int i, l;
1654

    
1655
        /* find a source dir */
1656
        src_path = strrchr(src, '/');
1657
        if (src_path)
1658
            src_path++;
1659
        else
1660
            src_path = src;
1661

    
1662
        /* find a next level down to target */
1663
        for (i = 0, l = strlen(ref->path) - 1; l >= 0; l--)
1664
            if (ref->path[l] == '/') {
1665
                if (i == ref->nlvl_to - 1)
1666
                    break;
1667
                else
1668
                    i++;
1669
            }
1670

    
1671
        /* compose filename if next level down to target was found */
1672
        if (i == ref->nlvl_to - 1 && src_path - src  < sizeof(filename)) {
1673
            memcpy(filename, src, src_path - src);
1674
            filename[src_path - src] = 0;
1675

    
1676
            for (i = 1; i < ref->nlvl_from; i++)
1677
                av_strlcat(filename, "../", 1024);
1678

    
1679
            av_strlcat(filename, ref->path + l + 1, 1024);
1680

    
1681
            if (!url_fopen(pb, filename, URL_RDONLY))
1682
                return 0;
1683
        }
1684
    }
1685

    
1686
    return AVERROR(ENOENT);
1687
};
1688

    
1689
static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1690
{
1691
    AVStream *st;
1692
    MOVStreamContext *sc;
1693
    int ret;
1694

    
1695
    st = av_new_stream(c->fc, c->fc->nb_streams);
1696
    if (!st) return AVERROR(ENOMEM);
1697
    sc = av_mallocz(sizeof(MOVStreamContext));
1698
    if (!sc) return AVERROR(ENOMEM);
1699

    
1700
    st->priv_data = sc;
1701
    st->codec->codec_type = AVMEDIA_TYPE_DATA;
1702
    sc->ffindex = st->index;
1703

    
1704
    if ((ret = mov_read_default(c, pb, atom)) < 0)
1705
        return ret;
1706

    
1707
    /* sanity checks */
1708
    if (sc->chunk_count && (!sc->stts_count || !sc->stsc_count ||
1709
                            (!sc->sample_size && !sc->sample_count))) {
1710
        av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
1711
               st->index);
1712
        return 0;
1713
    }
1714

    
1715
    if (!sc->time_scale) {
1716
        av_log(c->fc, AV_LOG_WARNING, "stream %d, timescale not set\n", st->index);
1717
        sc->time_scale = c->time_scale;
1718
        if (!sc->time_scale)
1719
            sc->time_scale = 1;
1720
    }
1721

    
1722
    av_set_pts_info(st, 64, 1, sc->time_scale);
1723

    
1724
    if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
1725
        !st->codec->frame_size && sc->stts_count == 1) {
1726
        st->codec->frame_size = av_rescale(sc->stts_data[0].duration,
1727
                                           st->codec->sample_rate, sc->time_scale);
1728
        dprintf(c->fc, "frame size %d\n", st->codec->frame_size);
1729
    }
1730

    
1731
    mov_build_index(c, st);
1732

    
1733
    if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) {
1734
        MOVDref *dref = &sc->drefs[sc->dref_id - 1];
1735
        if (mov_open_dref(&sc->pb, c->fc->filename, dref) < 0)
1736
            av_log(c->fc, AV_LOG_ERROR,
1737
                   "stream %d, error opening alias: path='%s', dir='%s', "
1738
                   "filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d\n",
1739
                   st->index, dref->path, dref->dir, dref->filename,
1740
                   dref->volume, dref->nlvl_from, dref->nlvl_to);
1741
    } else
1742
        sc->pb = c->fc->pb;
1743

    
1744
    if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1745
        if (st->codec->width != sc->width || st->codec->height != sc->height) {
1746
            AVRational r = av_d2q(((double)st->codec->height * sc->width) /
1747
                                  ((double)st->codec->width * sc->height), INT_MAX);
1748
            if (st->sample_aspect_ratio.num)
1749
                st->sample_aspect_ratio = av_mul_q(st->sample_aspect_ratio, r);
1750
            else
1751
                st->sample_aspect_ratio = r;
1752
        }
1753

    
1754
        av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
1755
                  sc->time_scale*st->nb_frames, st->duration, INT_MAX);
1756
    }
1757

    
1758
    switch (st->codec->codec_id) {
1759
#if CONFIG_H261_DECODER
1760
    case CODEC_ID_H261:
1761
#endif
1762
#if CONFIG_H263_DECODER
1763
    case CODEC_ID_H263:
1764
#endif
1765
#if CONFIG_H264_DECODER
1766
    case CODEC_ID_H264:
1767
#endif
1768
#if CONFIG_MPEG4_DECODER
1769
    case CODEC_ID_MPEG4:
1770
#endif
1771
        st->codec->width = 0; /* let decoder init width/height */
1772
        st->codec->height= 0;
1773
        break;
1774
    }
1775

    
1776
    /* Do not need those anymore. */
1777
    av_freep(&sc->chunk_offsets);
1778
    av_freep(&sc->stsc_data);
1779
    av_freep(&sc->sample_sizes);
1780
    av_freep(&sc->keyframes);
1781
    av_freep(&sc->stts_data);
1782
    av_freep(&sc->stps_data);
1783

    
1784
    return 0;
1785
}
1786

    
1787
static int mov_read_ilst(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1788
{
1789
    int ret;
1790
    c->itunes_metadata = 1;
1791
    ret = mov_read_default(c, pb, atom);
1792
    c->itunes_metadata = 0;
1793
    return ret;
1794
}
1795

    
1796
static int mov_read_meta(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1797
{
1798
    while (atom.size > 8) {
1799
        uint32_t tag = get_le32(pb);
1800
        atom.size -= 4;
1801
        if (tag == MKTAG('h','d','l','r')) {
1802
            url_fseek(pb, -8, SEEK_CUR);
1803
            atom.size += 8;
1804
            return mov_read_default(c, pb, atom);
1805
        }
1806
    }
1807
    return 0;
1808
}
1809

    
1810
static int mov_read_tkhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1811
{
1812
    int i;
1813
    int width;
1814
    int height;
1815
    int64_t disp_transform[2];
1816
    int display_matrix[3][2];
1817
    AVStream *st;
1818
    MOVStreamContext *sc;
1819
    int version;
1820

    
1821
    if (c->fc->nb_streams < 1)
1822
        return 0;
1823
    st = c->fc->streams[c->fc->nb_streams-1];
1824
    sc = st->priv_data;
1825

    
1826
    version = get_byte(pb);
1827
    get_be24(pb); /* flags */
1828
    /*
1829
    MOV_TRACK_ENABLED 0x0001
1830
    MOV_TRACK_IN_MOVIE 0x0002
1831
    MOV_TRACK_IN_PREVIEW 0x0004
1832
    MOV_TRACK_IN_POSTER 0x0008
1833
    */
1834

    
1835
    if (version == 1) {
1836
        get_be64(pb);
1837
        get_be64(pb);
1838
    } else {
1839
        get_be32(pb); /* creation time */
1840
        get_be32(pb); /* modification time */
1841
    }
1842
    st->id = (int)get_be32(pb); /* track id (NOT 0 !)*/
1843
    get_be32(pb); /* reserved */
1844

    
1845
    /* highlevel (considering edits) duration in movie timebase */
1846
    (version == 1) ? get_be64(pb) : get_be32(pb);
1847
    get_be32(pb); /* reserved */
1848
    get_be32(pb); /* reserved */
1849

    
1850
    get_be16(pb); /* layer */
1851
    get_be16(pb); /* alternate group */
1852
    get_be16(pb); /* volume */
1853
    get_be16(pb); /* reserved */
1854

    
1855
    //read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
1856
    // they're kept in fixed point format through all calculations
1857
    // ignore u,v,z b/c we don't need the scale factor to calc aspect ratio
1858
    for (i = 0; i < 3; i++) {
1859
        display_matrix[i][0] = get_be32(pb);   // 16.16 fixed point
1860
        display_matrix[i][1] = get_be32(pb);   // 16.16 fixed point
1861
        get_be32(pb);           // 2.30 fixed point (not used)
1862
    }
1863

    
1864
    width = get_be32(pb);       // 16.16 fixed point track width
1865
    height = get_be32(pb);      // 16.16 fixed point track height
1866
    sc->width = width >> 16;
1867
    sc->height = height >> 16;
1868

    
1869
    // transform the display width/height according to the matrix
1870
    // skip this if the display matrix is the default identity matrix
1871
    // or if it is rotating the picture, ex iPhone 3GS
1872
    // to keep the same scale, use [width height 1<<16]
1873
    if (width && height &&
1874
        ((display_matrix[0][0] != 65536  ||
1875
          display_matrix[1][1] != 65536) &&
1876
         !display_matrix[0][1] &&
1877
         !display_matrix[1][0] &&
1878
         !display_matrix[2][0] && !display_matrix[2][1])) {
1879
        for (i = 0; i < 2; i++)
1880
            disp_transform[i] =
1881
                (int64_t)  width  * display_matrix[0][i] +
1882
                (int64_t)  height * display_matrix[1][i] +
1883
                ((int64_t) display_matrix[2][i] << 16);
1884

    
1885
        //sample aspect ratio is new width/height divided by old width/height
1886
        st->sample_aspect_ratio = av_d2q(
1887
            ((double) disp_transform[0] * height) /
1888
            ((double) disp_transform[1] * width), INT_MAX);
1889
    }
1890
    return 0;
1891
}
1892

    
1893
static int mov_read_tfhd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1894
{
1895
    MOVFragment *frag = &c->fragment;
1896
    MOVTrackExt *trex = NULL;
1897
    int flags, track_id, i;
1898

    
1899
    get_byte(pb); /* version */
1900
    flags = get_be24(pb);
1901

    
1902
    track_id = get_be32(pb);
1903
    if (!track_id)
1904
        return -1;
1905
    frag->track_id = track_id;
1906
    for (i = 0; i < c->trex_count; i++)
1907
        if (c->trex_data[i].track_id == frag->track_id) {
1908
            trex = &c->trex_data[i];
1909
            break;
1910
        }
1911
    if (!trex) {
1912
        av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
1913
        return -1;
1914
    }
1915

    
1916
    if (flags & 0x01) frag->base_data_offset = get_be64(pb);
1917
    else              frag->base_data_offset = frag->moof_offset;
1918
    if (flags & 0x02) frag->stsd_id          = get_be32(pb);
1919
    else              frag->stsd_id          = trex->stsd_id;
1920

    
1921
    frag->duration = flags & 0x08 ? get_be32(pb) : trex->duration;
1922
    frag->size     = flags & 0x10 ? get_be32(pb) : trex->size;
1923
    frag->flags    = flags & 0x20 ? get_be32(pb) : trex->flags;
1924
    dprintf(c->fc, "frag flags 0x%x\n", frag->flags);
1925
    return 0;
1926
}
1927

    
1928
static int mov_read_trex(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1929
{
1930
    MOVTrackExt *trex;
1931

    
1932
    if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data))
1933
        return -1;
1934
    trex = av_realloc(c->trex_data, (c->trex_count+1)*sizeof(*c->trex_data));
1935
    if (!trex)
1936
        return AVERROR(ENOMEM);
1937
    c->trex_data = trex;
1938
    trex = &c->trex_data[c->trex_count++];
1939
    get_byte(pb); /* version */
1940
    get_be24(pb); /* flags */
1941
    trex->track_id = get_be32(pb);
1942
    trex->stsd_id  = get_be32(pb);
1943
    trex->duration = get_be32(pb);
1944
    trex->size     = get_be32(pb);
1945
    trex->flags    = get_be32(pb);
1946
    return 0;
1947
}
1948

    
1949
static int mov_read_trun(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
1950
{
1951
    MOVFragment *frag = &c->fragment;
1952
    AVStream *st = NULL;
1953
    MOVStreamContext *sc;
1954
    uint64_t offset;
1955
    int64_t dts;
1956
    int data_offset = 0;
1957
    unsigned entries, first_sample_flags = frag->flags;
1958
    int flags, distance, i;
1959

    
1960
    for (i = 0; i < c->fc->nb_streams; i++) {
1961
        if (c->fc->streams[i]->id == frag->track_id) {
1962
            st = c->fc->streams[i];
1963
            break;
1964
        }
1965
    }
1966
    if (!st) {
1967
        av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %d\n", frag->track_id);
1968
        return -1;
1969
    }
1970
    sc = st->priv_data;
1971
    if (sc->pseudo_stream_id+1 != frag->stsd_id)
1972
        return 0;
1973
    get_byte(pb); /* version */
1974
    flags = get_be24(pb);
1975
    entries = get_be32(pb);
1976
    dprintf(c->fc, "flags 0x%x entries %d\n", flags, entries);
1977
    if (flags & 0x001) data_offset        = get_be32(pb);
1978
    if (flags & 0x004) first_sample_flags = get_be32(pb);
1979
    if (flags & 0x800) {
1980
        MOVStts *ctts_data;
1981
        if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data))
1982
            return -1;
1983
        ctts_data = av_realloc(sc->ctts_data,
1984
                               (entries+sc->ctts_count)*sizeof(*sc->ctts_data));
1985
        if (!ctts_data)
1986
            return AVERROR(ENOMEM);
1987
        sc->ctts_data = ctts_data;
1988
    }
1989
    dts = st->duration;
1990
    offset = frag->base_data_offset + data_offset;
1991
    distance = 0;
1992
    dprintf(c->fc, "first sample flags 0x%x\n", first_sample_flags);
1993
    for (i = 0; i < entries; i++) {
1994
        unsigned sample_size = frag->size;
1995
        int sample_flags = i ? frag->flags : first_sample_flags;
1996
        unsigned sample_duration = frag->duration;
1997
        int keyframe;
1998

    
1999
        if (flags & 0x100) sample_duration = get_be32(pb);
2000
        if (flags & 0x200) sample_size     = get_be32(pb);
2001
        if (flags & 0x400) sample_flags    = get_be32(pb);
2002
        if (flags & 0x800) {
2003
            sc->ctts_data[sc->ctts_count].count = 1;
2004
            sc->ctts_data[sc->ctts_count].duration = get_be32(pb);
2005
            sc->ctts_count++;
2006
        }
2007
        if ((keyframe = st->codec->codec_type == AVMEDIA_TYPE_AUDIO ||
2008
             (flags & 0x004 && !i && !sample_flags) || sample_flags & 0x2000000))
2009
            distance = 0;
2010
        av_add_index_entry(st, offset, dts, sample_size, distance,
2011
                           keyframe ? AVINDEX_KEYFRAME : 0);
2012
        dprintf(c->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
2013
                "size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
2014
                offset, dts, sample_size, distance, keyframe);
2015
        distance++;
2016
        dts += sample_duration;
2017
        offset += sample_size;
2018
    }
2019
    frag->moof_offset = offset;
2020
    st->duration = dts;
2021
    return 0;
2022
}
2023

    
2024
/* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
2025
/* like the files created with Adobe Premiere 5.0, for samples see */
2026
/* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
2027
static int mov_read_wide(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
2028
{
2029
    int err;
2030

    
2031
    if (atom.size < 8)
2032
        return 0; /* continue */
2033
    if (get_be32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */
2034
        url_fskip(pb, atom.size - 4);
2035
        return 0;
2036
    }
2037
    atom.type = get_le32(pb);
2038
    atom.size -= 8;
2039
    if (atom.type != MKTAG('m','d','a','t')) {
2040
        url_fskip(pb, atom.size);
2041
        return 0;
2042
    }
2043
    err = mov_read_mdat(c, pb, atom);
2044
    return err;
2045
}
2046

    
2047
static int mov_read_cmov(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
2048
{
2049
#if CONFIG_ZLIB
2050
    ByteIOContext ctx;
2051
    uint8_t *cmov_data;
2052
    uint8_t *moov_data; /* uncompressed data */
2053
    long cmov_len, moov_len;
2054
    int ret = -1;
2055

    
2056
    get_be32(pb); /* dcom atom */
2057
    if (get_le32(pb) != MKTAG('d','c','o','m'))
2058
        return -1;
2059
    if (get_le32(pb) != MKTAG('z','l','i','b')) {
2060
        av_log(c->fc, AV_LOG_ERROR, "unknown compression for cmov atom !");
2061
        return -1;
2062
    }
2063
    get_be32(pb); /* cmvd atom */
2064
    if (get_le32(pb) != MKTAG('c','m','v','d'))
2065
        return -1;
2066
    moov_len = get_be32(pb); /* uncompressed size */
2067
    cmov_len = atom.size - 6 * 4;
2068

    
2069
    cmov_data = av_malloc(cmov_len);
2070
    if (!cmov_data)
2071
        return AVERROR(ENOMEM);
2072
    moov_data = av_malloc(moov_len);
2073
    if (!moov_data) {
2074
        av_free(cmov_data);
2075
        return AVERROR(ENOMEM);
2076
    }
2077
    get_buffer(pb, cmov_data, cmov_len);
2078
    if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)
2079
        goto free_and_return;
2080
    if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0)
2081
        goto free_and_return;
2082
    atom.type = MKTAG('m','o','o','v');
2083
    atom.size = moov_len;
2084
#ifdef DEBUG
2085
//    { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }
2086
#endif
2087
    ret = mov_read_default(c, &ctx, atom);
2088
free_and_return:
2089
    av_free(moov_data);
2090
    av_free(cmov_data);
2091
    return ret;
2092
#else
2093
    av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
2094
    return -1;
2095
#endif
2096
}
2097

    
2098
/* edit list atom */
2099
static int mov_read_elst(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
2100
{
2101
    MOVStreamContext *sc;
2102
    int i, edit_count;
2103

    
2104
    if (c->fc->nb_streams < 1)
2105
        return 0;
2106
    sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
2107

    
2108
    get_byte(pb); /* version */
2109
    get_be24(pb); /* flags */
2110
    edit_count = get_be32(pb); /* entries */
2111

    
2112
    if((uint64_t)edit_count*12+8 > atom.size)
2113
        return -1;
2114

    
2115
    for(i=0; i<edit_count; i++){
2116
        int time;
2117
        int duration = get_be32(pb); /* Track duration */
2118
        time = get_be32(pb); /* Media time */
2119
        get_be32(pb); /* Media rate */
2120
        if (i == 0 && time >= -1) {
2121
            sc->time_offset = time != -1 ? time : -duration;
2122
        }
2123
    }
2124

    
2125
    if(edit_count > 1)
2126
        av_log(c->fc, AV_LOG_WARNING, "multiple edit list entries, "
2127
               "a/v desync might occur, patch welcome\n");
2128

    
2129
    dprintf(c->fc, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, edit_count);
2130
    return 0;
2131
}
2132

    
2133
static const MOVParseTableEntry mov_default_parse_table[] = {
2134
{ MKTAG('a','v','s','s'), mov_read_extradata },
2135
{ MKTAG('c','o','6','4'), mov_read_stco },
2136
{ MKTAG('c','t','t','s'), mov_read_ctts }, /* composition time to sample */
2137
{ MKTAG('d','i','n','f'), mov_read_default },
2138
{ MKTAG('d','r','e','f'), mov_read_dref },
2139
{ MKTAG('e','d','t','s'), mov_read_default },
2140
{ MKTAG('e','l','s','t'), mov_read_elst },
2141
{ MKTAG('e','n','d','a'), mov_read_enda },
2142
{ MKTAG('f','i','e','l'), mov_read_extradata },
2143
{ MKTAG('f','t','y','p'), mov_read_ftyp },
2144
{ MKTAG('g','l','b','l'), mov_read_glbl },
2145
{ MKTAG('h','d','l','r'), mov_read_hdlr },
2146
{ MKTAG('i','l','s','t'), mov_read_ilst },
2147
{ MKTAG('j','p','2','h'), mov_read_extradata },
2148
{ MKTAG('m','d','a','t'), mov_read_mdat },
2149
{ MKTAG('m','d','h','d'), mov_read_mdhd },
2150
{ MKTAG('m','d','i','a'), mov_read_default },
2151
{ MKTAG('m','e','t','a'), mov_read_meta },
2152
{ MKTAG('m','i','n','f'), mov_read_default },
2153
{ MKTAG('m','o','o','f'), mov_read_moof },
2154
{ MKTAG('m','o','o','v'), mov_read_moov },
2155
{ MKTAG('m','v','e','x'), mov_read_default },
2156
{ MKTAG('m','v','h','d'), mov_read_mvhd },
2157
{ MKTAG('S','M','I',' '), mov_read_smi }, /* Sorenson extension ??? */
2158
{ MKTAG('a','l','a','c'), mov_read_extradata }, /* alac specific atom */
2159
{ MKTAG('a','v','c','C'), mov_read_glbl },
2160
{ MKTAG('p','a','s','p'), mov_read_pasp },
2161
{ MKTAG('s','t','b','l'), mov_read_default },
2162
{ MKTAG('s','t','c','o'), mov_read_stco },
2163
{ MKTAG('s','t','p','s'), mov_read_stps },
2164
{ MKTAG('s','t','s','c'), mov_read_stsc },
2165
{ MKTAG('s','t','s','d'), mov_read_stsd }, /* sample description */
2166
{ MKTAG('s','t','s','s'), mov_read_stss }, /* sync sample */
2167
{ MKTAG('s','t','s','z'), mov_read_stsz }, /* sample size */
2168
{ MKTAG('s','t','t','s'), mov_read_stts },
2169
{ MKTAG('s','t','z','2'), mov_read_stsz }, /* compact sample size */
2170
{ MKTAG('t','k','h','d'), mov_read_tkhd }, /* track header */
2171
{ MKTAG('t','f','h','d'), mov_read_tfhd }, /* track fragment header */
2172
{ MKTAG('t','r','a','k'), mov_read_trak },
2173
{ MKTAG('t','r','a','f'), mov_read_default },
2174
{ MKTAG('t','r','e','x'), mov_read_trex },
2175
{ MKTAG('t','r','u','n'), mov_read_trun },
2176
{ MKTAG('u','d','t','a'), mov_read_default },
2177
{ MKTAG('w','a','v','e'), mov_read_wave },
2178
{ MKTAG('e','s','d','s'), mov_read_esds },
2179
{ MKTAG('w','i','d','e'), mov_read_wide }, /* place holder */
2180
{ MKTAG('c','m','o','v'), mov_read_cmov },
2181
{ 0, NULL }
2182
};
2183

    
2184
static int mov_probe(AVProbeData *p)
2185
{
2186
    unsigned int offset;
2187
    uint32_t tag;
2188
    int score = 0;
2189

    
2190
    /* check file header */
2191
    offset = 0;
2192
    for(;;) {
2193
        /* ignore invalid offset */
2194
        if ((offset + 8) > (unsigned int)p->buf_size)
2195
            return score;
2196
        tag = AV_RL32(p->buf + offset + 4);
2197
        switch(tag) {
2198
        /* check for obvious tags */
2199
        case MKTAG('j','P',' ',' '): /* jpeg 2000 signature */
2200
        case MKTAG('m','o','o','v'):
2201
        case MKTAG('m','d','a','t'):
2202
        case MKTAG('p','n','o','t'): /* detect movs with preview pics like ew.mov and april.mov */
2203
        case MKTAG('u','d','t','a'): /* Packet Video PVAuthor adds this and a lot of more junk */
2204
        case MKTAG('f','t','y','p'):
2205
            return AVPROBE_SCORE_MAX;
2206
        /* those are more common words, so rate then a bit less */
2207
        case MKTAG('e','d','i','w'): /* xdcam files have reverted first tags */
2208
        case MKTAG('w','i','d','e'):
2209
        case MKTAG('f','r','e','e'):
2210
        case MKTAG('j','u','n','k'):
2211
        case MKTAG('p','i','c','t'):
2212
            return AVPROBE_SCORE_MAX - 5;
2213
        case MKTAG(0x82,0x82,0x7f,0x7d):
2214
        case MKTAG('s','k','i','p'):
2215
        case MKTAG('u','u','i','d'):
2216
        case MKTAG('p','r','f','l'):
2217
            offset = AV_RB32(p->buf+offset) + offset;
2218
            /* if we only find those cause probedata is too small at least rate them */
2219
            score = AVPROBE_SCORE_MAX - 50;
2220
            break;
2221
        default:
2222
            /* unrecognized tag */
2223
            return score;
2224
        }
2225
    }
2226
    return score;
2227
}
2228

    
2229
static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)
2230
{
2231
    MOVContext *mov = s->priv_data;
2232
    ByteIOContext *pb = s->pb;
2233
    int err;
2234
    MOVAtom atom = { 0 };
2235

    
2236
    mov->fc = s;
2237
    /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
2238
    if(!url_is_streamed(pb))
2239
        atom.size = url_fsize(pb);
2240
    else
2241
        atom.size = INT64_MAX;
2242

    
2243
    /* check MOV header */
2244
    if ((err = mov_read_default(mov, pb, atom)) < 0) {
2245
        av_log(s, AV_LOG_ERROR, "error reading header: %d\n", err);
2246
        return err;
2247
    }
2248
    if (!mov->found_moov) {
2249
        av_log(s, AV_LOG_ERROR, "moov atom not found\n");
2250
        return -1;
2251
    }
2252
    dprintf(mov->fc, "on_parse_exit_offset=%lld\n", url_ftell(pb));
2253

    
2254
    return 0;
2255
}
2256

    
2257
static AVIndexEntry *mov_find_next_sample(AVFormatContext *s, AVStream **st)
2258
{
2259
    AVIndexEntry *sample = NULL;
2260
    int64_t best_dts = INT64_MAX;
2261
    int i;
2262
    for (i = 0; i < s->nb_streams; i++) {
2263
        AVStream *avst = s->streams[i];
2264
        MOVStreamContext *msc = avst->priv_data;
2265
        if (msc->pb && msc->current_sample < avst->nb_index_entries) {
2266
            AVIndexEntry *current_sample = &avst->index_entries[msc->current_sample];
2267
            int64_t dts = av_rescale(current_sample->timestamp, AV_TIME_BASE, msc->time_scale);
2268
            dprintf(s, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts);
2269
            if (!sample || (url_is_streamed(s->pb) && current_sample->pos < sample->pos) ||
2270
                (!url_is_streamed(s->pb) &&
2271
                 ((msc->pb != s->pb && dts < best_dts) || (msc->pb == s->pb &&
2272
                 ((FFABS(best_dts - dts) <= AV_TIME_BASE && current_sample->pos < sample->pos) ||
2273
                  (FFABS(best_dts - dts) > AV_TIME_BASE && dts < best_dts)))))) {
2274
                sample = current_sample;
2275
                best_dts = dts;
2276
                *st = avst;
2277
            }
2278
        }
2279
    }
2280
    return sample;
2281
}
2282

    
2283
static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
2284
{
2285
    MOVContext *mov = s->priv_data;
2286
    MOVStreamContext *sc;
2287
    AVIndexEntry *sample;
2288
    AVStream *st = NULL;
2289
    int ret;
2290
 retry:
2291
    sample = mov_find_next_sample(s, &st);
2292
    if (!sample) {
2293
        mov->found_mdat = 0;
2294
        if (!url_is_streamed(s->pb) ||
2295
            mov_read_default(mov, s->pb, (MOVAtom){ 0, INT64_MAX }) < 0 ||
2296
            url_feof(s->pb))
2297
            return AVERROR_EOF;
2298
        dprintf(s, "read fragments, offset 0x%llx\n", url_ftell(s->pb));
2299
        goto retry;
2300
    }
2301
    sc = st->priv_data;
2302
    /* must be done just before reading, to avoid infinite loop on sample */
2303
    sc->current_sample++;
2304

    
2305
    if (st->discard != AVDISCARD_ALL) {
2306
        if (url_fseek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
2307
            av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n",
2308
                   sc->ffindex, sample->pos);
2309
            return -1;
2310
        }
2311
        ret = av_get_packet(sc->pb, pkt, sample->size);
2312
        if (ret < 0)
2313
            return ret;
2314
#if CONFIG_DV_DEMUXER
2315
        if (mov->dv_demux && sc->dv_audio_container) {
2316
            dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size);
2317
            av_free(pkt->data);
2318
            pkt->size = 0;
2319
            ret = dv_get_packet(mov->dv_demux, pkt);
2320
            if (ret < 0)
2321
                return ret;
2322
        }
2323
#endif
2324
    }
2325

    
2326
    pkt->stream_index = sc->ffindex;
2327
    pkt->dts = sample->timestamp;
2328
    if (sc->ctts_data) {
2329
        pkt->pts = pkt->dts + sc->dts_shift + sc->ctts_data[sc->ctts_index].duration;
2330
        /* update ctts context */
2331
        sc->ctts_sample++;
2332
        if (sc->ctts_index < sc->ctts_count &&
2333
            sc->ctts_data[sc->ctts_index].count == sc->ctts_sample) {
2334
            sc->ctts_index++;
2335
            sc->ctts_sample = 0;
2336
        }
2337
        if (sc->wrong_dts)
2338
            pkt->dts = AV_NOPTS_VALUE;
2339
    } else {
2340
        int64_t next_dts = (sc->current_sample < st->nb_index_entries) ?
2341
            st->index_entries[sc->current_sample].timestamp : st->duration;
2342
        pkt->duration = next_dts - pkt->dts;
2343
        pkt->pts = pkt->dts;
2344
    }
2345
    if (st->discard == AVDISCARD_ALL)
2346
        goto retry;
2347
    pkt->flags |= sample->flags & AVINDEX_KEYFRAME ? PKT_FLAG_KEY : 0;
2348
    pkt->pos = sample->pos;
2349
    dprintf(s, "stream %d, pts %"PRId64", dts %"PRId64", pos 0x%"PRIx64", duration %d\n",
2350
            pkt->stream_index, pkt->pts, pkt->dts, pkt->pos, pkt->duration);
2351
    return 0;
2352
}
2353

    
2354
static int mov_seek_stream(AVFormatContext *s, AVStream *st, int64_t timestamp, int flags)
2355
{
2356
    MOVStreamContext *sc = st->priv_data;
2357
    int sample, time_sample;
2358
    int i;
2359

    
2360
    sample = av_index_search_timestamp(st, timestamp, flags);
2361
    dprintf(s, "stream %d, timestamp %"PRId64", sample %d\n", st->index, timestamp, sample);
2362
    if (sample < 0) /* not sure what to do */
2363
        return -1;
2364
    sc->current_sample = sample;
2365
    dprintf(s, "stream %d, found sample %d\n", st->index, sc->current_sample);
2366
    /* adjust ctts index */
2367
    if (sc->ctts_data) {
2368
        time_sample = 0;
2369
        for (i = 0; i < sc->ctts_count; i++) {
2370
            int next = time_sample + sc->ctts_data[i].count;
2371
            if (next > sc->current_sample) {
2372
                sc->ctts_index = i;
2373
                sc->ctts_sample = sc->current_sample - time_sample;
2374
                break;
2375
            }
2376
            time_sample = next;
2377
        }
2378
    }
2379
    return sample;
2380
}
2381

    
2382
static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
2383
{
2384
    AVStream *st;
2385
    int64_t seek_timestamp, timestamp;
2386
    int sample;
2387
    int i;
2388

    
2389
    if (stream_index >= s->nb_streams)
2390
        return -1;
2391
    if (sample_time < 0)
2392
        sample_time = 0;
2393

    
2394
    st = s->streams[stream_index];
2395
    sample = mov_seek_stream(s, st, sample_time, flags);
2396
    if (sample < 0)
2397
        return -1;
2398

    
2399
    /* adjust seek timestamp to found sample timestamp */
2400
    seek_timestamp = st->index_entries[sample].timestamp;
2401

    
2402
    for (i = 0; i < s->nb_streams; i++) {
2403
        st = s->streams[i];
2404
        if (stream_index == i)
2405
            continue;
2406

    
2407
        timestamp = av_rescale_q(seek_timestamp, s->streams[stream_index]->time_base, st->time_base);
2408
        mov_seek_stream(s, st, timestamp, flags);
2409
    }
2410
    return 0;
2411
}
2412

    
2413
static int mov_read_close(AVFormatContext *s)
2414
{
2415
    MOVContext *mov = s->priv_data;
2416
    int i, j;
2417

    
2418
    for (i = 0; i < s->nb_streams; i++) {
2419
        AVStream *st = s->streams[i];
2420
        MOVStreamContext *sc = st->priv_data;
2421

    
2422
        av_freep(&sc->ctts_data);
2423
        for (j = 0; j < sc->drefs_count; j++) {
2424
            av_freep(&sc->drefs[j].path);
2425
            av_freep(&sc->drefs[j].dir);
2426
        }
2427
        av_freep(&sc->drefs);
2428
        if (sc->pb && sc->pb != s->pb)
2429
            url_fclose(sc->pb);
2430

    
2431
        av_freep(&st->codec->palctrl);
2432
    }
2433

    
2434
    if (mov->dv_demux) {
2435
        for(i = 0; i < mov->dv_fctx->nb_streams; i++) {
2436
            av_freep(&mov->dv_fctx->streams[i]->codec);
2437
            av_freep(&mov->dv_fctx->streams[i]);
2438
        }
2439
        av_freep(&mov->dv_fctx);
2440
        av_freep(&mov->dv_demux);
2441
    }
2442

    
2443
    av_freep(&mov->trex_data);
2444

    
2445
    return 0;
2446
}
2447

    
2448
AVInputFormat mov_demuxer = {
2449
    "mov,mp4,m4a,3gp,3g2,mj2",
2450
    NULL_IF_CONFIG_SMALL("QuickTime/MPEG-4/Motion JPEG 2000 format"),
2451
    sizeof(MOVContext),
2452
    mov_probe,
2453
    mov_read_header,
2454
    mov_read_packet,
2455
    mov_read_close,
2456
    mov_read_seek,
2457
};