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ffmpeg / libavformat / avidec.c @ 9862f9e1

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1 de6d9b64 Fabrice Bellard
/*
2 7fbde343 Aurelien Jacobs
 * AVI demuxer
3 15d6e361 Diego Biurrun
 * Copyright (c) 2001 Fabrice Bellard
4 de6d9b64 Fabrice Bellard
 *
5 b78e7197 Diego Biurrun
 * This file is part of FFmpeg.
6
 *
7
 * FFmpeg is free software; you can redistribute it and/or
8 19720f15 Fabrice Bellard
 * modify it under the terms of the GNU Lesser General Public
9
 * License as published by the Free Software Foundation; either
10 b78e7197 Diego Biurrun
 * version 2.1 of the License, or (at your option) any later version.
11 de6d9b64 Fabrice Bellard
 *
12 b78e7197 Diego Biurrun
 * FFmpeg is distributed in the hope that it will be useful,
13 de6d9b64 Fabrice Bellard
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 19720f15 Fabrice Bellard
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15
 * Lesser General Public License for more details.
16 de6d9b64 Fabrice Bellard
 *
17 19720f15 Fabrice Bellard
 * You should have received a copy of the GNU Lesser General Public
18 b78e7197 Diego Biurrun
 * License along with FFmpeg; if not, write to the Free Software
19 5509bffa Diego Biurrun
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 de6d9b64 Fabrice Bellard
 */
21 7b114c09 Måns Rullgård
22 c13b250b Baptiste Coudurier
//#define DEBUG
23
//#define DEBUG_SEEK
24
25 2bb6eba2 Aurelien Jacobs
#include "libavutil/intreadwrite.h"
26 7b114c09 Måns Rullgård
#include "libavutil/bswap.h"
27 de6d9b64 Fabrice Bellard
#include "avformat.h"
28
#include "avi.h"
29 7458ccbb Roman Shaposhnik
#include "dv.h"
30 9d9f4119 Måns Rullgård
#include "riff.h"
31 de6d9b64 Fabrice Bellard
32 52a0bbff Michael Niedermayer
#undef NDEBUG
33
#include <assert.h>
34
35 155e9ee9 Fabrice Bellard
typedef struct AVIStream {
36 7c7f3866 Michael Niedermayer
    int64_t frame_offset; /* current frame (video) or byte (audio) counter
37 155e9ee9 Fabrice Bellard
                         (used to compute the pts) */
38 7c7f3866 Michael Niedermayer
    int remaining;
39
    int packet_size;
40
41 155e9ee9 Fabrice Bellard
    int scale;
42 115329f1 Diego Biurrun
    int rate;
43 8223bca5 Michael Niedermayer
    int sample_size; /* size of one sample (or packet) (in the rate/scale sense) in bytes */
44 115329f1 Diego Biurrun
45 94d1d6c0 Michael Niedermayer
    int64_t cum_len; /* temporary storage (used during seek) */
46 115329f1 Diego Biurrun
47 d2c5f0a4 Michael Niedermayer
    int prefix;                       ///< normally 'd'<<8 + 'c' or 'w'<<8 + 'b'
48
    int prefix_count;
49 b7c40744 Michael Niedermayer
    uint32_t pal[256];
50
    int has_pal;
51 89ac23cd Michael Niedermayer
    int dshow_block_align;            ///< block align variable used to emulate bugs in the MS dshow demuxer
52 155e9ee9 Fabrice Bellard
} AVIStream;
53 de6d9b64 Fabrice Bellard
54
typedef struct {
55 7458ccbb Roman Shaposhnik
    int64_t  riff_end;
56
    int64_t  movi_end;
57 ea4b2b5e Michael Niedermayer
    int64_t  fsize;
58 bc5c918e Diego Biurrun
    int64_t movi_list;
59 7ccc636f Michael Niedermayer
    int64_t last_pkt_pos;
60 155e9ee9 Fabrice Bellard
    int index_loaded;
61 8f9298f8 Roman Shaposhnik
    int is_odml;
62 7c7f3866 Michael Niedermayer
    int non_interleaved;
63
    int stream_index;
64 ddaae6a9 Roman Shaposhnik
    DVDemuxContext* dv_demux;
65 0c0fd063 Michael Niedermayer
    int odml_depth;
66
#define MAX_ODML_DEPTH 1000
67 de6d9b64 Fabrice Bellard
} AVIContext;
68
69 7b31b092 Aurelien Jacobs
static const char avi_headers[][8] = {
70
    { 'R', 'I', 'F', 'F',    'A', 'V', 'I', ' ' },
71
    { 'R', 'I', 'F', 'F',    'A', 'V', 'I', 'X' },
72
    { 'R', 'I', 'F', 'F',    'A', 'V', 'I', 0x19},
73 b925ef61 Aurelien Jacobs
    { 'O', 'N', '2', ' ',    'O', 'N', '2', 'f' },
74 0b04ebb3 Vladimir Voroshilov
    { 'R', 'I', 'F', 'F',    'A', 'M', 'V', ' ' },
75 7b31b092 Aurelien Jacobs
    { 0 }
76
};
77
78 42feef6b Michael Niedermayer
static int avi_load_index(AVFormatContext *s);
79 30a43f2d Michael Niedermayer
static int guess_ni_flag(AVFormatContext *s);
80 42feef6b Michael Niedermayer
81 de6d9b64 Fabrice Bellard
#ifdef DEBUG
82 1101abfe Zdenek Kabelac
static void print_tag(const char *str, unsigned int tag, int size)
83 de6d9b64 Fabrice Bellard
{
84 c13b250b Baptiste Coudurier
    dprintf(NULL, "%s: tag=%c%c%c%c size=0x%x\n",
85 de6d9b64 Fabrice Bellard
           str, tag & 0xff,
86
           (tag >> 8) & 0xff,
87
           (tag >> 16) & 0xff,
88
           (tag >> 24) & 0xff,
89
           size);
90
}
91
#endif
92
93 8a472821 Michael Niedermayer
static inline int get_duration(AVIStream *ast, int len){
94
    if(ast->sample_size){
95
        return len;
96 89ac23cd Michael Niedermayer
    }else if (ast->dshow_block_align){
97
        return (len + ast->dshow_block_align - 1)/ast->dshow_block_align;
98 8a472821 Michael Niedermayer
    }else
99
        return 1;
100
}
101
102 87ad63c0 Benoit Fouet
static int get_riff(AVFormatContext *s, ByteIOContext *pb)
103 06219cb1 Roman Shaposhnik
{
104 87ad63c0 Benoit Fouet
    AVIContext *avi = s->priv_data;
105 7b31b092 Aurelien Jacobs
    char header[8];
106
    int i;
107 06219cb1 Roman Shaposhnik
108 7b31b092 Aurelien Jacobs
    /* check RIFF header */
109
    get_buffer(pb, header, 4);
110 06219cb1 Roman Shaposhnik
    avi->riff_end = get_le32(pb);   /* RIFF chunk size */
111
    avi->riff_end += url_ftell(pb); /* RIFF chunk end */
112 7b31b092 Aurelien Jacobs
    get_buffer(pb, header+4, 4);
113
114
    for(i=0; avi_headers[i][0]; i++)
115
        if(!memcmp(header, avi_headers[i], 8))
116
            break;
117
    if(!avi_headers[i][0])
118 06219cb1 Roman Shaposhnik
        return -1;
119 115329f1 Diego Biurrun
120 7b31b092 Aurelien Jacobs
    if(header[7] == 0x19)
121 87ad63c0 Benoit Fouet
        av_log(s, AV_LOG_INFO, "This file has been generated by a totally broken muxer.\n");
122 7b31b092 Aurelien Jacobs
123 06219cb1 Roman Shaposhnik
    return 0;
124
}
125
126 94d1d6c0 Michael Niedermayer
static int read_braindead_odml_indx(AVFormatContext *s, int frame_num){
127 8945ebb9 Michael Niedermayer
    AVIContext *avi = s->priv_data;
128 899681cd Björn Axelsson
    ByteIOContext *pb = s->pb;
129 94d1d6c0 Michael Niedermayer
    int longs_pre_entry= get_le16(pb);
130
    int index_sub_type = get_byte(pb);
131
    int index_type     = get_byte(pb);
132
    int entries_in_use = get_le32(pb);
133
    int chunk_id       = get_le32(pb);
134
    int64_t base       = get_le64(pb);
135
    int stream_id= 10*((chunk_id&0xFF) - '0') + (((chunk_id>>8)&0xFF) - '0');
136
    AVStream *st;
137
    AVIStream *ast;
138
    int i;
139 8945ebb9 Michael Niedermayer
    int64_t last_pos= -1;
140 899681cd Björn Axelsson
    int64_t filesize= url_fsize(s->pb);
141 94d1d6c0 Michael Niedermayer
142 965a63af Michael Niedermayer
#ifdef DEBUG_SEEK
143 949b1a13 Steve L'Homme
    av_log(s, AV_LOG_ERROR, "longs_pre_entry:%d index_type:%d entries_in_use:%d chunk_id:%X base:%16"PRIX64"\n",
144 965a63af Michael Niedermayer
        longs_pre_entry,index_type, entries_in_use, chunk_id, base);
145
#endif
146 94d1d6c0 Michael Niedermayer
147 1ac08937 Michael Niedermayer
    if(stream_id >= s->nb_streams || stream_id < 0)
148 94d1d6c0 Michael Niedermayer
        return -1;
149
    st= s->streams[stream_id];
150
    ast = st->priv_data;
151
152
    if(index_sub_type)
153
        return -1;
154
155
    get_le32(pb);
156
157
    if(index_type && longs_pre_entry != 2)
158
        return -1;
159
    if(index_type>1)
160
        return -1;
161
162 965a63af Michael Niedermayer
    if(filesize > 0 && base >= filesize){
163
        av_log(s, AV_LOG_ERROR, "ODML index invalid\n");
164
        if(base>>32 == (base & 0xFFFFFFFF) && (base & 0xFFFFFFFF) < filesize && filesize <= 0xFFFFFFFF)
165
            base &= 0xFFFFFFFF;
166
        else
167
            return -1;
168
    }
169
170 94d1d6c0 Michael Niedermayer
    for(i=0; i<entries_in_use; i++){
171
        if(index_type){
172 30a43f2d Michael Niedermayer
            int64_t pos= get_le32(pb) + base - 8;
173 94d1d6c0 Michael Niedermayer
            int len    = get_le32(pb);
174 30a43f2d Michael Niedermayer
            int key= len >= 0;
175 94d1d6c0 Michael Niedermayer
            len &= 0x7FFFFFFF;
176
177 965a63af Michael Niedermayer
#ifdef DEBUG_SEEK
178 949b1a13 Steve L'Homme
            av_log(s, AV_LOG_ERROR, "pos:%"PRId64", len:%X\n", pos, len);
179 965a63af Michael Niedermayer
#endif
180 8ebe099a Michael Niedermayer
            if(url_feof(pb))
181
                return -1;
182
183 8945ebb9 Michael Niedermayer
            if(last_pos == pos || pos == base - 8)
184
                avi->non_interleaved= 1;
185 df84d7d9 Michael Niedermayer
            if(last_pos != pos && (len || !ast->sample_size))
186 83a4d356 Michael Niedermayer
                av_add_index_entry(st, pos, ast->cum_len, len, 0, key ? AVINDEX_KEYFRAME : 0);
187 30a43f2d Michael Niedermayer
188 8a472821 Michael Niedermayer
            ast->cum_len += get_duration(ast, len);
189 8945ebb9 Michael Niedermayer
            last_pos= pos;
190 94d1d6c0 Michael Niedermayer
        }else{
191 26b89135 Måns Rullgård
            int64_t offset, pos;
192
            int duration;
193
            offset = get_le64(pb);
194
            get_le32(pb);       /* size */
195
            duration = get_le32(pb);
196 8ebe099a Michael Niedermayer
197
            if(url_feof(pb))
198
                return -1;
199
200 26b89135 Måns Rullgård
            pos = url_ftell(pb);
201 94d1d6c0 Michael Niedermayer
202 0c0fd063 Michael Niedermayer
            if(avi->odml_depth > MAX_ODML_DEPTH){
203
                av_log(s, AV_LOG_ERROR, "Too deeply nested ODML indexes\n");
204
                return -1;
205
            }
206
207 94d1d6c0 Michael Niedermayer
            url_fseek(pb, offset+8, SEEK_SET);
208 0c0fd063 Michael Niedermayer
            avi->odml_depth++;
209 94d1d6c0 Michael Niedermayer
            read_braindead_odml_indx(s, frame_num);
210 0c0fd063 Michael Niedermayer
            avi->odml_depth--;
211 94d1d6c0 Michael Niedermayer
            frame_num += duration;
212
213
            url_fseek(pb, pos, SEEK_SET);
214
        }
215
    }
216 965a63af Michael Niedermayer
    avi->index_loaded=1;
217 94d1d6c0 Michael Niedermayer
    return 0;
218
}
219
220 115e8ae5 Michael Niedermayer
static void clean_index(AVFormatContext *s){
221 965a63af Michael Niedermayer
    int i;
222
    int64_t j;
223 115e8ae5 Michael Niedermayer
224
    for(i=0; i<s->nb_streams; i++){
225
        AVStream *st = s->streams[i];
226
        AVIStream *ast = st->priv_data;
227
        int n= st->nb_index_entries;
228
        int max= ast->sample_size;
229
        int64_t pos, size, ts;
230
231
        if(n != 1 || ast->sample_size==0)
232
            continue;
233
234
        while(max < 1024) max+=max;
235
236
        pos= st->index_entries[0].pos;
237
        size= st->index_entries[0].size;
238
        ts= st->index_entries[0].timestamp;
239
240
        for(j=0; j<size; j+=max){
241 83a4d356 Michael Niedermayer
            av_add_index_entry(st, pos+j, ts+j, FFMIN(max, size-j), 0, AVINDEX_KEYFRAME);
242 115e8ae5 Michael Niedermayer
        }
243
    }
244
}
245
246 04d2540c Anton Khirnov
static int avi_read_tag(AVFormatContext *s, AVStream *st, uint32_t tag, uint32_t size)
247 57060f89 David Conrad
{
248 47146dfb Michael Niedermayer
    ByteIOContext *pb = s->pb;
249 04d2540c Anton Khirnov
    char key[5] = {0}, *value;
250 47146dfb Michael Niedermayer
251 57060f89 David Conrad
    size += (size & 1);
252 47146dfb Michael Niedermayer
253 12ad6671 Michael Niedermayer
    if (size == UINT_MAX)
254
        return -1;
255
    value = av_malloc(size+1);
256
    if (!value)
257
        return -1;
258 7a9af8ec Michael Niedermayer
    get_buffer(pb, value, size);
259
    value[size]=0;
260 12ad6671 Michael Niedermayer
261 04d2540c Anton Khirnov
    AV_WL32(key, tag);
262
263 7a9af8ec Michael Niedermayer
    if(st)
264
        return av_metadata_set2(&st->metadata, key, value,
265
                                    AV_METADATA_DONT_STRDUP_VAL);
266
    else
267 12ad6671 Michael Niedermayer
    return av_metadata_set2(&s->metadata, key, value,
268
                                  AV_METADATA_DONT_STRDUP_VAL);
269 57060f89 David Conrad
}
270
271 04d2540c Anton Khirnov
static void avi_read_info(AVFormatContext *s, uint64_t end)
272
{
273
    while (url_ftell(s->pb) < end) {
274
        uint32_t tag  = get_le32(s->pb);
275
        uint32_t size = get_le32(s->pb);
276
        avi_read_tag(s, NULL, tag, size);
277
    }
278
}
279
280 1101abfe Zdenek Kabelac
static int avi_read_header(AVFormatContext *s, AVFormatParameters *ap)
281 de6d9b64 Fabrice Bellard
{
282 c9a65ca8 Fabrice Bellard
    AVIContext *avi = s->priv_data;
283 899681cd Björn Axelsson
    ByteIOContext *pb = s->pb;
284 9d9aac84 Marc Mason
    unsigned int tag, tag1, handler;
285 b53f1064 Michael Niedermayer
    int codec_type, stream_index, frame_period, bit_rate;
286 bce8840a Michael Niedermayer
    unsigned int size;
287 6d29fba9 Michael Niedermayer
    int i;
288 de6d9b64 Fabrice Bellard
    AVStream *st;
289 26b89135 Måns Rullgård
    AVIStream *ast = NULL;
290 0b04ebb3 Vladimir Voroshilov
    int avih_width=0, avih_height=0;
291
    int amv_file_format=0;
292 5a4a4d78 Reimar Döffinger
    uint64_t list_end = 0;
293 de6d9b64 Fabrice Bellard
294 7c7f3866 Michael Niedermayer
    avi->stream_index= -1;
295 115329f1 Diego Biurrun
296 037c08d6 Måns Rullgård
    if (get_riff(s, pb) < 0)
297 de6d9b64 Fabrice Bellard
        return -1;
298 1101abfe Zdenek Kabelac
299 ea4b2b5e Michael Niedermayer
    avi->fsize = url_fsize(pb);
300
    if(avi->fsize<=0)
301 87657891 Baptiste Coudurier
        avi->fsize= avi->riff_end == 8 ? INT64_MAX : avi->riff_end;
302 ea4b2b5e Michael Niedermayer
303 de6d9b64 Fabrice Bellard
    /* first list tag */
304
    stream_index = -1;
305
    codec_type = -1;
306
    frame_period = 0;
307
    for(;;) {
308
        if (url_feof(pb))
309
            goto fail;
310
        tag = get_le32(pb);
311
        size = get_le32(pb);
312
#ifdef DEBUG
313
        print_tag("tag", tag, size);
314
#endif
315
316
        switch(tag) {
317
        case MKTAG('L', 'I', 'S', 'T'):
318 5a4a4d78 Reimar Döffinger
            list_end = url_ftell(pb) + size;
319 15d6e361 Diego Biurrun
            /* Ignored, except at start of video packets. */
320 de6d9b64 Fabrice Bellard
            tag1 = get_le32(pb);
321
#ifdef DEBUG
322
            print_tag("list", tag1, 0);
323
#endif
324
            if (tag1 == MKTAG('m', 'o', 'v', 'i')) {
325 155e9ee9 Fabrice Bellard
                avi->movi_list = url_ftell(pb) - 4;
326 2064c77a David Conrad
                if(size) avi->movi_end = avi->movi_list + size + (size & 1);
327 a965c478 Aurelien Jacobs
                else     avi->movi_end = url_fsize(pb);
328 c13b250b Baptiste Coudurier
                dprintf(NULL, "movi end=%"PRIx64"\n", avi->movi_end);
329 de6d9b64 Fabrice Bellard
                goto end_of_header;
330
            }
331 04d2540c Anton Khirnov
            else if (tag1 == MKTAG('I', 'N', 'F', 'O'))
332
                avi_read_info(s, list_end);
333
334 de6d9b64 Fabrice Bellard
            break;
335 8f9298f8 Roman Shaposhnik
        case MKTAG('d', 'm', 'l', 'h'):
336 bb270c08 Diego Biurrun
            avi->is_odml = 1;
337
            url_fskip(pb, size + (size & 1));
338
            break;
339 0b04ebb3 Vladimir Voroshilov
        case MKTAG('a', 'm', 'v', 'h'):
340
            amv_file_format=1;
341 de6d9b64 Fabrice Bellard
        case MKTAG('a', 'v', 'i', 'h'):
342 15d6e361 Diego Biurrun
            /* AVI header */
343 1101abfe Zdenek Kabelac
            /* using frame_period is bad idea */
344 de6d9b64 Fabrice Bellard
            frame_period = get_le32(pb);
345
            bit_rate = get_le32(pb) * 8;
346 1894edeb Michael Niedermayer
            get_le32(pb);
347
            avi->non_interleaved |= get_le32(pb) & AVIF_MUSTUSEINDEX;
348
349
            url_fskip(pb, 2 * 4);
350 6d29fba9 Michael Niedermayer
            get_le32(pb);
351 0b04ebb3 Vladimir Voroshilov
            get_le32(pb);
352
            avih_width=get_le32(pb);
353
            avih_height=get_le32(pb);
354 6d29fba9 Michael Niedermayer
355 0b04ebb3 Vladimir Voroshilov
            url_fskip(pb, size - 10 * 4);
356 6d29fba9 Michael Niedermayer
            break;
357
        case MKTAG('s', 't', 'r', 'h'):
358
            /* stream header */
359
360
            tag1 = get_le32(pb);
361
            handler = get_le32(pb); /* codec tag */
362
363
            if(tag1 == MKTAG('p', 'a', 'd', 's')){
364
                url_fskip(pb, size - 8);
365
                break;
366
            }else{
367
                stream_index++;
368
                st = av_new_stream(s, stream_index);
369 de6d9b64 Fabrice Bellard
                if (!st)
370
                    goto fail;
371 9ee91c2f Michael Niedermayer
372 155e9ee9 Fabrice Bellard
                ast = av_mallocz(sizeof(AVIStream));
373
                if (!ast)
374
                    goto fail;
375
                st->priv_data = ast;
376 bb270c08 Diego Biurrun
            }
377 0b04ebb3 Vladimir Voroshilov
            if(amv_file_format)
378
                tag1 = stream_index ? MKTAG('a','u','d','s') : MKTAG('v','i','d','s');
379 6d29fba9 Michael Niedermayer
380 cc11e2b3 Michael Niedermayer
#ifdef DEBUG
381 e344c1ea Steve L'Homme
            print_tag("strh", tag1, -1);
382 cc11e2b3 Michael Niedermayer
#endif
383 b53f1064 Michael Niedermayer
            if(tag1 == MKTAG('i', 'a', 'v', 's') || tag1 == MKTAG('i', 'v', 'a', 's')){
384 6eb2de74 Roman Shaposhnik
                int64_t dv_dur;
385
386 115329f1 Diego Biurrun
                /*
387 bb270c08 Diego Biurrun
                 * After some consideration -- I don't think we
388 15d6e361 Diego Biurrun
                 * have to support anything but DV in type1 AVIs.
389 bb270c08 Diego Biurrun
                 */
390
                if (s->nb_streams != 1)
391
                    goto fail;
392
393
                if (handler != MKTAG('d', 'v', 's', 'd') &&
394
                    handler != MKTAG('d', 'v', 'h', 'd') &&
395
                    handler != MKTAG('d', 'v', 's', 'l'))
396
                   goto fail;
397
398
                ast = s->streams[0]->priv_data;
399
                av_freep(&s->streams[0]->codec->extradata);
400
                av_freep(&s->streams[0]);
401
                s->nb_streams = 0;
402 49fb20cb Aurelien Jacobs
                if (CONFIG_DV_DEMUXER) {
403 38ca53da Aurelien Jacobs
                    avi->dv_demux = dv_init_demux(s);
404
                    if (!avi->dv_demux)
405
                        goto fail;
406 a2a6332b Aurelien Jacobs
                }
407 bb270c08 Diego Biurrun
                s->streams[0]->priv_data = ast;
408
                url_fskip(pb, 3 * 4);
409
                ast->scale = get_le32(pb);
410
                ast->rate = get_le32(pb);
411 6eb2de74 Roman Shaposhnik
                url_fskip(pb, 4);  /* start time */
412
413
                dv_dur = get_le32(pb);
414
                if (ast->scale > 0 && ast->rate > 0 && dv_dur > 0) {
415
                    dv_dur *= AV_TIME_BASE;
416
                    s->duration = av_rescale(dv_dur, ast->scale, ast->rate);
417
                }
418
                /*
419
                 * else, leave duration alone; timing estimation in utils.c
420 15d6e361 Diego Biurrun
                 *      will make a guess based on bitrate.
421 6eb2de74 Roman Shaposhnik
                 */
422
423 bb270c08 Diego Biurrun
                stream_index = s->nb_streams - 1;
424 6eb2de74 Roman Shaposhnik
                url_fskip(pb, size - 9*4);
425 b53f1064 Michael Niedermayer
                break;
426
            }
427 b559b29b Michael Niedermayer
428 6d29fba9 Michael Niedermayer
            assert(stream_index < s->nb_streams);
429 01f4895c Michael Niedermayer
            st->codec->stream_codec_tag= handler;
430 b559b29b Michael Niedermayer
431 b53f1064 Michael Niedermayer
            get_le32(pb); /* flags */
432
            get_le16(pb); /* priority */
433
            get_le16(pb); /* language */
434
            get_le32(pb); /* initial frame */
435
            ast->scale = get_le32(pb);
436
            ast->rate = get_le32(pb);
437 4a030a1f Michael Niedermayer
            if(!(ast->scale && ast->rate)){
438 15d6e361 Diego Biurrun
                av_log(s, AV_LOG_WARNING, "scale/rate is %u/%u which is invalid. (This file has been generated by broken software.)\n", ast->scale, ast->rate);
439 0dbb6515 Michael Niedermayer
                if(frame_period){
440
                    ast->rate = 1000000;
441
                    ast->scale = frame_period;
442
                }else{
443
                    ast->rate = 25;
444
                    ast->scale = 1;
445
                }
446 4a030a1f Michael Niedermayer
            }
447 b53f1064 Michael Niedermayer
            av_set_pts_info(st, 64, ast->scale, ast->rate);
448 115329f1 Diego Biurrun
449 b72a2bc8 Michael Niedermayer
            ast->cum_len=get_le32(pb); /* start */
450 bce8840a Michael Niedermayer
            st->nb_frames = get_le32(pb);
451 b559b29b Michael Niedermayer
452 b53f1064 Michael Niedermayer
            st->start_time = 0;
453
            get_le32(pb); /* buffer size */
454
            get_le32(pb); /* quality */
455
            ast->sample_size = get_le32(pb); /* sample ssize */
456 2b70eb2b Michael Niedermayer
            ast->cum_len *= FFMAX(1, ast->sample_size);
457 87ad63c0 Benoit Fouet
//            av_log(s, AV_LOG_DEBUG, "%d %d %d %d\n", ast->rate, ast->scale, ast->start, ast->sample_size);
458 247eadca Fabrice Bellard
459 b53f1064 Michael Niedermayer
            switch(tag1) {
460 bb270c08 Diego Biurrun
            case MKTAG('v', 'i', 'd', 's'):
461 72415b2a Stefano Sabatini
                codec_type = AVMEDIA_TYPE_VIDEO;
462 247eadca Fabrice Bellard
463 b53f1064 Michael Niedermayer
                ast->sample_size = 0;
464
                break;
465
            case MKTAG('a', 'u', 'd', 's'):
466 72415b2a Stefano Sabatini
                codec_type = AVMEDIA_TYPE_AUDIO;
467 9bf9a5fc Michael Niedermayer
                break;
468 cc11e2b3 Michael Niedermayer
            case MKTAG('t', 'x', 't', 's'):
469 115329f1 Diego Biurrun
                //FIXME
470 72415b2a Stefano Sabatini
                codec_type = AVMEDIA_TYPE_DATA; //AVMEDIA_TYPE_SUB ?  FIXME
471 cc11e2b3 Michael Niedermayer
                break;
472 25176d6e Florian Echtler
            case MKTAG('d', 'a', 't', 's'):
473 72415b2a Stefano Sabatini
                codec_type = AVMEDIA_TYPE_DATA;
474 25176d6e Florian Echtler
                break;
475 9bf9a5fc Michael Niedermayer
            default:
476 30667f42 Michael Niedermayer
                av_log(s, AV_LOG_ERROR, "unknown stream type %X\n", tag1);
477 9bf9a5fc Michael Niedermayer
                goto fail;
478 de6d9b64 Fabrice Bellard
            }
479 3c8d75e6 Michael Niedermayer
            if(ast->sample_size == 0)
480
                st->duration = st->nb_frames;
481 2b70eb2b Michael Niedermayer
            ast->frame_offset= ast->cum_len;
482 b53f1064 Michael Niedermayer
            url_fskip(pb, size - 12 * 4);
483 de6d9b64 Fabrice Bellard
            break;
484
        case MKTAG('s', 't', 'r', 'f'):
485
            /* stream header */
486 6d29fba9 Michael Niedermayer
            if (stream_index >= (unsigned)s->nb_streams || avi->dv_demux) {
487 de6d9b64 Fabrice Bellard
                url_fskip(pb, size);
488
            } else {
489 5a4a4d78 Reimar Döffinger
                uint64_t cur_pos = url_ftell(pb);
490
                if (cur_pos < list_end)
491
                    size = FFMIN(size, list_end - cur_pos);
492 de6d9b64 Fabrice Bellard
                st = s->streams[stream_index];
493
                switch(codec_type) {
494 72415b2a Stefano Sabatini
                case AVMEDIA_TYPE_VIDEO:
495 0b04ebb3 Vladimir Voroshilov
                    if(amv_file_format){
496
                        st->codec->width=avih_width;
497
                        st->codec->height=avih_height;
498 72415b2a Stefano Sabatini
                        st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
499 0b04ebb3 Vladimir Voroshilov
                        st->codec->codec_id = CODEC_ID_AMV;
500
                        url_fskip(pb, size);
501
                        break;
502
                    }
503 de6d9b64 Fabrice Bellard
                    get_le32(pb); /* size */
504 01f4895c Michael Niedermayer
                    st->codec->width = get_le32(pb);
505 31f2616d Michael Niedermayer
                    st->codec->height = (int32_t)get_le32(pb);
506 de6d9b64 Fabrice Bellard
                    get_le16(pb); /* panes */
507 dd1c8f3e Luca Abeni
                    st->codec->bits_per_coded_sample= get_le16(pb); /* depth */
508 de6d9b64 Fabrice Bellard
                    tag1 = get_le32(pb);
509 b559b29b Michael Niedermayer
                    get_le32(pb); /* ImageSize */
510
                    get_le32(pb); /* XPelsPerMeter */
511
                    get_le32(pb); /* YPelsPerMeter */
512
                    get_le32(pb); /* ClrUsed */
513
                    get_le32(pb); /* ClrImportant */
514
515 bce8840a Michael Niedermayer
                    if (tag1 == MKTAG('D', 'X', 'S', 'B') || tag1 == MKTAG('D','X','S','A')) {
516 72415b2a Stefano Sabatini
                        st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
517 cbb79c0e Reimar Döffinger
                        st->codec->codec_tag = tag1;
518
                        st->codec->codec_id = CODEC_ID_XSUB;
519
                        break;
520
                    }
521
522 e344c1ea Steve L'Homme
                    if(size > 10*4 && size<(1<<30)){
523
                        st->codec->extradata_size= size - 10*4;
524
                        st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
525 3dcddf82 Reimar Döffinger
                        if (!st->codec->extradata) {
526
                            st->codec->extradata_size= 0;
527
                            return AVERROR(ENOMEM);
528
                        }
529 e344c1ea Steve L'Homme
                        get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
530
                    }
531 115329f1 Diego Biurrun
532 01f4895c Michael Niedermayer
                    if(st->codec->extradata_size & 1) //FIXME check if the encoder really did this correctly
533 952c69c4 Michael Niedermayer
                        get_byte(pb);
534 b559b29b Michael Niedermayer
535 15d6e361 Diego Biurrun
                    /* Extract palette from extradata if bpp <= 8. */
536
                    /* This code assumes that extradata contains only palette. */
537
                    /* This is true for all paletted codecs implemented in FFmpeg. */
538 dd1c8f3e Luca Abeni
                    if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) {
539 01f4895c Michael Niedermayer
                        st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));
540 63613fe6 Måns Rullgård
#if HAVE_BIGENDIAN
541 01f4895c Michael Niedermayer
                        for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
542
                            st->codec->palctrl->palette[i] = bswap_32(((uint32_t*)st->codec->extradata)[i]);
543 5e29abf8 Roberto Togni
#else
544 01f4895c Michael Niedermayer
                        memcpy(st->codec->palctrl->palette, st->codec->extradata,
545
                               FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
546 5e29abf8 Roberto Togni
#endif
547 01f4895c Michael Niedermayer
                        st->codec->palctrl->palette_changed = 1;
548 5e29abf8 Roberto Togni
                    }
549
550 de6d9b64 Fabrice Bellard
#ifdef DEBUG
551
                    print_tag("video", tag1, 0);
552
#endif
553 72415b2a Stefano Sabatini
                    st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
554 01f4895c Michael Niedermayer
                    st->codec->codec_tag = tag1;
555 1a40491e Daniel Verkamp
                    st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag1);
556 15d6e361 Diego Biurrun
                    st->need_parsing = AVSTREAM_PARSE_HEADERS; // This is needed to get the pict type which is necessary for generating correct pts.
557 0941ee0f Carl Eugen Hoyos
                    // Support "Resolution 1:1" for Avid AVI Codec
558
                    if(tag1 == MKTAG('A', 'V', 'R', 'n') &&
559
                       st->codec->extradata_size >= 31 &&
560
                       !memcmp(&st->codec->extradata[28], "1:1", 3))
561
                        st->codec->codec_id = CODEC_ID_RAWVIDEO;
562 31f2616d Michael Niedermayer
563
                    if(st->codec->codec_tag==0 && st->codec->height > 0 && st->codec->extradata_size < 1U<<30){
564
                        st->codec->extradata_size+= 9;
565
                        st->codec->extradata= av_realloc(st->codec->extradata, st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
566
                        if(st->codec->extradata)
567
                            memcpy(st->codec->extradata + st->codec->extradata_size - 9, "BottomUp", 9);
568
                    }
569
                    st->codec->height= FFABS(st->codec->height);
570
571 b559b29b Michael Niedermayer
//                    url_fskip(pb, size - 5 * 4);
572 de6d9b64 Fabrice Bellard
                    break;
573 72415b2a Stefano Sabatini
                case AVMEDIA_TYPE_AUDIO:
574 1a40491e Daniel Verkamp
                    ff_get_wav_header(pb, st->codec, size);
575 89ac23cd Michael Niedermayer
                    ast->dshow_block_align= st->codec->block_align;
576 78db672c Michael Niedermayer
                    if(ast->sample_size && st->codec->block_align && ast->sample_size != st->codec->block_align){
577 143b0820 Michael Niedermayer
                        av_log(s, AV_LOG_WARNING, "sample size (%d) != block align (%d)\n", ast->sample_size, st->codec->block_align);
578 78db672c Michael Niedermayer
                        ast->sample_size= st->codec->block_align;
579
                    }
580 bf29cbc2 Sebastian Vater
                    if (size&1) /* 2-aligned (fix for Stargate SG-1 - 3x18 - Shades of Grey.avi) */
581 1cef9527 François Revol
                        url_fskip(pb, 1);
582 5836d158 Diego Biurrun
                    /* Force parsing as several audio frames can be in
583 15d6e361 Diego Biurrun
                     * one packet and timestamps refer to packet start. */
584 a74008a4 Joakim Plate
                    st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
585 15d6e361 Diego Biurrun
                    /* ADTS header is in extradata, AAC without header must be
586
                     * stored as exact frames. Parser not needed and it will
587
                     * fail. */
588 cbee7a69 Baptiste Coudurier
                    if (st->codec->codec_id == CODEC_ID_AAC && st->codec->extradata_size)
589 57004ff1 Aurelien Jacobs
                        st->need_parsing = AVSTREAM_PARSE_NONE;
590 8662900b Diego Biurrun
                    /* AVI files with Xan DPCM audio (wrongly) declare PCM
591
                     * audio in the header but have Axan as stream_code_tag. */
592 2bb6eba2 Aurelien Jacobs
                    if (st->codec->stream_codec_tag == AV_RL32("Axan")){
593 8662900b Diego Biurrun
                        st->codec->codec_id  = CODEC_ID_XAN_DPCM;
594
                        st->codec->codec_tag = 0;
595
                    }
596 9862f9e1 Michael Niedermayer
                    if (amv_file_format){
597 0b04ebb3 Vladimir Voroshilov
                        st->codec->codec_id  = CODEC_ID_ADPCM_IMA_AMV;
598 9862f9e1 Michael Niedermayer
                        ast->dshow_block_align = 0;
599
                    }
600 de6d9b64 Fabrice Bellard
                    break;
601
                default:
602 72415b2a Stefano Sabatini
                    st->codec->codec_type = AVMEDIA_TYPE_DATA;
603 01f4895c Michael Niedermayer
                    st->codec->codec_id= CODEC_ID_NONE;
604
                    st->codec->codec_tag= 0;
605 de6d9b64 Fabrice Bellard
                    url_fskip(pb, size);
606
                    break;
607
                }
608
            }
609
            break;
610 94d1d6c0 Michael Niedermayer
        case MKTAG('i', 'n', 'd', 'x'):
611
            i= url_ftell(pb);
612 2c00106c Michael Niedermayer
            if(!url_is_streamed(pb) && !(s->flags & AVFMT_FLAG_IGNIDX)){
613 b7b22558 Michael Niedermayer
                read_braindead_odml_indx(s, 0);
614
            }
615 94d1d6c0 Michael Niedermayer
            url_fseek(pb, i+size, SEEK_SET);
616
            break;
617 c86ec2f4 Michael Niedermayer
        case MKTAG('v', 'p', 'r', 'p'):
618
            if(stream_index < (unsigned)s->nb_streams && size > 9*4){
619
                AVRational active, active_aspect;
620
621
                st = s->streams[stream_index];
622
                get_le32(pb);
623
                get_le32(pb);
624
                get_le32(pb);
625
                get_le32(pb);
626
                get_le32(pb);
627
628
                active_aspect.den= get_le16(pb);
629 61559562 Michael Niedermayer
                active_aspect.num= get_le16(pb);
630 c86ec2f4 Michael Niedermayer
                active.num       = get_le32(pb);
631
                active.den       = get_le32(pb);
632
                get_le32(pb); //nbFieldsPerFrame
633
634
                if(active_aspect.num && active_aspect.den && active.num && active.den){
635 59729451 Aurelien Jacobs
                    st->sample_aspect_ratio= av_div_q(active_aspect, active);
636 c86ec2f4 Michael Niedermayer
//av_log(s, AV_LOG_ERROR, "vprp %d/%d %d/%d\n", active_aspect.num, active_aspect.den, active.num, active.den);
637
                }
638
                size -= 9*4;
639
            }
640
            url_fseek(pb, size, SEEK_CUR);
641
            break;
642 7a9af8ec Michael Niedermayer
        case MKTAG('s', 't', 'r', 'n'):
643
            if(s->nb_streams){
644 04d2540c Anton Khirnov
                avi_read_tag(s, s->streams[s->nb_streams-1], tag, size);
645 7a9af8ec Michael Niedermayer
                break;
646
            }
647 de6d9b64 Fabrice Bellard
        default:
648 755c18ae Michael Niedermayer
            if(size > 1000000){
649 15d6e361 Diego Biurrun
                av_log(s, AV_LOG_ERROR, "Something went wrong during header parsing, "
650
                                        "I will ignore it and try to continue anyway.\n");
651 755c18ae Michael Niedermayer
                avi->movi_list = url_ftell(pb) - 4;
652
                avi->movi_end  = url_fsize(pb);
653
                goto end_of_header;
654
            }
655 de6d9b64 Fabrice Bellard
            /* skip tag */
656
            size += (size & 1);
657
            url_fskip(pb, size);
658
            break;
659
        }
660
    }
661
 end_of_header:
662
    /* check stream number */
663
    if (stream_index != s->nb_streams - 1) {
664
    fail:
665
        return -1;
666
    }
667 1101abfe Zdenek Kabelac
668 b7b22558 Michael Niedermayer
    if(!avi->index_loaded && !url_is_streamed(pb))
669 94d1d6c0 Michael Niedermayer
        avi_load_index(s);
670 42feef6b Michael Niedermayer
    avi->index_loaded = 1;
671 30a43f2d Michael Niedermayer
    avi->non_interleaved |= guess_ni_flag(s);
672 fbfccc04 Michael Niedermayer
    for(i=0; i<s->nb_streams; i++){
673
        AVStream *st = s->streams[i];
674
        if(st->nb_index_entries)
675
            break;
676
    }
677
    if(i==s->nb_streams && avi->non_interleaved) {
678
        av_log(s, AV_LOG_WARNING, "non-interleaved AVI without index, switching to interleaved\n");
679
        avi->non_interleaved=0;
680
    }
681
682 9d4cd3bf Michael Niedermayer
    if(avi->non_interleaved) {
683 15d6e361 Diego Biurrun
        av_log(s, AV_LOG_INFO, "non-interleaved AVI\n");
684 115e8ae5 Michael Niedermayer
        clean_index(s);
685 9d4cd3bf Michael Niedermayer
    }
686 115329f1 Diego Biurrun
687 de6d9b64 Fabrice Bellard
    return 0;
688
}
689
690 f080a7bd Michael Niedermayer
static int get_stream_idx(int *d){
691
    if(    d[0] >= '0' && d[0] <= '9'
692
        && d[1] >= '0' && d[1] <= '9'){
693
        return (d[0] - '0') * 10 + (d[1] - '0');
694
    }else{
695
        return 100; //invalid stream ID
696
    }
697
}
698
699 1101abfe Zdenek Kabelac
static int avi_read_packet(AVFormatContext *s, AVPacket *pkt)
700 de6d9b64 Fabrice Bellard
{
701
    AVIContext *avi = s->priv_data;
702 899681cd Björn Axelsson
    ByteIOContext *pb = s->pb;
703 f5007cc8 Michael Niedermayer
    int n, d[8];
704
    unsigned int size;
705 bc5c918e Diego Biurrun
    int64_t i, sync;
706 7458ccbb Roman Shaposhnik
    void* dstr;
707 115329f1 Diego Biurrun
708 49fb20cb Aurelien Jacobs
    if (CONFIG_DV_DEMUXER && avi->dv_demux) {
709 f5007cc8 Michael Niedermayer
        int size = dv_get_packet(avi->dv_demux, pkt);
710 bb270c08 Diego Biurrun
        if (size >= 0)
711
            return size;
712 2af7e610 Fabrice Bellard
    }
713 115329f1 Diego Biurrun
714 7c7f3866 Michael Niedermayer
    if(avi->non_interleaved){
715 79396ac6 Måns Rullgård
        int best_stream_index = 0;
716 7c7f3866 Michael Niedermayer
        AVStream *best_st= NULL;
717
        AVIStream *best_ast;
718
        int64_t best_ts= INT64_MAX;
719
        int i;
720 115329f1 Diego Biurrun
721 7c7f3866 Michael Niedermayer
        for(i=0; i<s->nb_streams; i++){
722
            AVStream *st = s->streams[i];
723
            AVIStream *ast = st->priv_data;
724
            int64_t ts= ast->frame_offset;
725 2c14ded3 Maksym Veremeyenko
            int64_t last_ts;
726 7c7f3866 Michael Niedermayer
727 b60de406 Maksym Veremeyenko
            if(!st->nb_index_entries)
728
                continue;
729
730 2c14ded3 Maksym Veremeyenko
            last_ts = st->index_entries[st->nb_index_entries - 1].timestamp;
731
            if(!ast->remaining && ts > last_ts)
732
                continue;
733
734 83a4d356 Michael Niedermayer
            ts = av_rescale_q(ts, st->time_base, (AVRational){FFMAX(1, ast->sample_size), AV_TIME_BASE});
735 7c7f3866 Michael Niedermayer
736 87ad63c0 Benoit Fouet
//            av_log(s, AV_LOG_DEBUG, "%"PRId64" %d/%d %"PRId64"\n", ts, st->time_base.num, st->time_base.den, ast->frame_offset);
737 b60de406 Maksym Veremeyenko
            if(ts < best_ts){
738 7c7f3866 Michael Niedermayer
                best_ts= ts;
739
                best_st= st;
740
                best_stream_index= i;
741
            }
742
        }
743 fce88d52 Michael Niedermayer
        if(!best_st)
744
            return -1;
745
746 7c7f3866 Michael Niedermayer
        best_ast = best_st->priv_data;
747 83a4d356 Michael Niedermayer
        best_ts = av_rescale_q(best_ts, (AVRational){FFMAX(1, best_ast->sample_size), AV_TIME_BASE}, best_st->time_base);
748 7c7f3866 Michael Niedermayer
        if(best_ast->remaining)
749
            i= av_index_search_timestamp(best_st, best_ts, AVSEEK_FLAG_ANY | AVSEEK_FLAG_BACKWARD);
750 25983dcd Michael Niedermayer
        else{
751 7c7f3866 Michael Niedermayer
            i= av_index_search_timestamp(best_st, best_ts, AVSEEK_FLAG_ANY);
752 25983dcd Michael Niedermayer
            if(i>=0)
753 83a4d356 Michael Niedermayer
                best_ast->frame_offset= best_st->index_entries[i].timestamp;
754 25983dcd Michael Niedermayer
        }
755 7c7f3866 Michael Niedermayer
756 87ad63c0 Benoit Fouet
//        av_log(s, AV_LOG_DEBUG, "%d\n", i);
757 7c7f3866 Michael Niedermayer
        if(i>=0){
758
            int64_t pos= best_st->index_entries[i].pos;
759 5c89153e Michael Niedermayer
            pos += best_ast->packet_size - best_ast->remaining;
760 899681cd Björn Axelsson
            url_fseek(s->pb, pos + 8, SEEK_SET);
761 87ad63c0 Benoit Fouet
//        av_log(s, AV_LOG_DEBUG, "pos=%"PRId64"\n", pos);
762 115329f1 Diego Biurrun
763 8223bca5 Michael Niedermayer
            assert(best_ast->remaining <= best_ast->packet_size);
764
765 1894edeb Michael Niedermayer
            avi->stream_index= best_stream_index;
766
            if(!best_ast->remaining)
767 8223bca5 Michael Niedermayer
                best_ast->packet_size=
768 1894edeb Michael Niedermayer
                best_ast->remaining= best_st->index_entries[i].size;
769 7c7f3866 Michael Niedermayer
        }
770
    }
771 115329f1 Diego Biurrun
772 4a8d5135 Michael Niedermayer
resync:
773 7c7f3866 Michael Niedermayer
    if(avi->stream_index >= 0){
774
        AVStream *st= s->streams[ avi->stream_index ];
775
        AVIStream *ast= st->priv_data;
776 c60a0f85 Michael Niedermayer
        int size, err;
777 115329f1 Diego Biurrun
778 e84dab5f Michael Niedermayer
        if(ast->sample_size <= 1) // minorityreport.AVI block_align=1024 sample_size=1 IMA-ADPCM
779 7c7f3866 Michael Niedermayer
            size= INT_MAX;
780 115329f1 Diego Biurrun
        else if(ast->sample_size < 32)
781 28eb5773 Reimar Döffinger
            // arbitrary multiplier to avoid tiny packets for raw PCM data
782
            size= 1024*ast->sample_size;
783 7c7f3866 Michael Niedermayer
        else
784
            size= ast->sample_size;
785
786
        if(size > ast->remaining)
787
            size= ast->remaining;
788 7ccc636f Michael Niedermayer
        avi->last_pkt_pos= url_ftell(pb);
789 c60a0f85 Michael Niedermayer
        err= av_get_packet(pb, pkt, size);
790
        if(err<0)
791
            return err;
792 115329f1 Diego Biurrun
793 b7c40744 Michael Niedermayer
        if(ast->has_pal && pkt->data && pkt->size<(unsigned)INT_MAX/2){
794 c60a0f85 Michael Niedermayer
            void *ptr= av_realloc(pkt->data, pkt->size + 4*256 + FF_INPUT_BUFFER_PADDING_SIZE);
795
            if(ptr){
796 b7c40744 Michael Niedermayer
            ast->has_pal=0;
797
            pkt->size += 4*256;
798 c60a0f85 Michael Niedermayer
            pkt->data= ptr;
799 b7c40744 Michael Niedermayer
                memcpy(pkt->data + pkt->size - 4*256, ast->pal, 4*256);
800 c60a0f85 Michael Niedermayer
            }else
801
                av_log(s, AV_LOG_ERROR, "Failed to append palette\n");
802 b7c40744 Michael Niedermayer
        }
803
804 49fb20cb Aurelien Jacobs
        if (CONFIG_DV_DEMUXER && avi->dv_demux) {
805 7c7f3866 Michael Niedermayer
            dstr = pkt->destruct;
806
            size = dv_produce_packet(avi->dv_demux, pkt,
807
                                    pkt->data, pkt->size);
808
            pkt->destruct = dstr;
809 cc947f04 Jean-Daniel Dupas
            pkt->flags |= AV_PKT_FLAG_KEY;
810 7c7f3866 Michael Niedermayer
        } else {
811 15d6e361 Diego Biurrun
            /* XXX: How to handle B-frames in AVI? */
812 7c7f3866 Michael Niedermayer
            pkt->dts = ast->frame_offset;
813
//                pkt->dts += ast->start;
814
            if(ast->sample_size)
815
                pkt->dts /= ast->sample_size;
816 87ad63c0 Benoit Fouet
//av_log(s, AV_LOG_DEBUG, "dts:%"PRId64" offset:%"PRId64" %d/%d smpl_siz:%d base:%d st:%d size:%d\n", pkt->dts, ast->frame_offset, ast->scale, ast->rate, ast->sample_size, AV_TIME_BASE, avi->stream_index, size);
817 7c7f3866 Michael Niedermayer
            pkt->stream_index = avi->stream_index;
818
819 72415b2a Stefano Sabatini
            if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
820 4323b09d Michael Niedermayer
                AVIndexEntry *e;
821
                int index;
822 ded3c7da Michael Niedermayer
                assert(st->index_entries);
823 7c7f3866 Michael Niedermayer
824 83a4d356 Michael Niedermayer
                index= av_index_search_timestamp(st, ast->frame_offset, 0);
825 4323b09d Michael Niedermayer
                e= &st->index_entries[index];
826 115329f1 Diego Biurrun
827 4323b09d Michael Niedermayer
                if(index >= 0 && e->timestamp == ast->frame_offset){
828
                    if (e->flags & AVINDEX_KEYFRAME)
829 cc947f04 Jean-Daniel Dupas
                        pkt->flags |= AV_PKT_FLAG_KEY;
830 4323b09d Michael Niedermayer
                }
831 7c7f3866 Michael Niedermayer
            } else {
832 cc947f04 Jean-Daniel Dupas
                pkt->flags |= AV_PKT_FLAG_KEY;
833 7c7f3866 Michael Niedermayer
            }
834 8a472821 Michael Niedermayer
            ast->frame_offset += get_duration(ast, pkt->size);
835 7c7f3866 Michael Niedermayer
        }
836
        ast->remaining -= size;
837
        if(!ast->remaining){
838
            avi->stream_index= -1;
839
            ast->packet_size= 0;
840
        }
841
842
        return size;
843
    }
844
845 4a8d5135 Michael Niedermayer
    memset(d, -1, sizeof(int)*8);
846
    for(i=sync=url_ftell(pb); !url_feof(pb); i++) {
847 df99755b Michael Niedermayer
        int j;
848 1101abfe Zdenek Kabelac
849 df99755b Michael Niedermayer
        for(j=0; j<7; j++)
850
            d[j]= d[j+1];
851
        d[7]= get_byte(pb);
852 115329f1 Diego Biurrun
853 df99755b Michael Niedermayer
        size= d[4] + (d[5]<<8) + (d[6]<<16) + (d[7]<<24);
854 115329f1 Diego Biurrun
855 f080a7bd Michael Niedermayer
        n= get_stream_idx(d+2);
856 87ad63c0 Benoit Fouet
//av_log(s, AV_LOG_DEBUG, "%X %X %X %X %X %X %X %X %"PRId64" %d %d\n", d[0], d[1], d[2], d[3], d[4], d[5], d[6], d[7], i, size, n);
857 f5007cc8 Michael Niedermayer
        if(i + (uint64_t)size > avi->fsize || d[0]<0)
858 d2c5f0a4 Michael Niedermayer
            continue;
859 115329f1 Diego Biurrun
860 d2c5f0a4 Michael Niedermayer
        //parse ix##
861
        if(  (d[0] == 'i' && d[1] == 'x' && n < s->nb_streams)
862 bb270c08 Diego Biurrun
        //parse JUNK
863 bc3a73bc Michael Niedermayer
           ||(d[0] == 'J' && d[1] == 'U' && d[2] == 'N' && d[3] == 'K')
864
           ||(d[0] == 'i' && d[1] == 'd' && d[2] == 'x' && d[3] == '1')){
865 8f9298f8 Roman Shaposhnik
            url_fskip(pb, size);
866 87ad63c0 Benoit Fouet
//av_log(s, AV_LOG_DEBUG, "SKIP\n");
867 4a8d5135 Michael Niedermayer
            goto resync;
868 8f9298f8 Roman Shaposhnik
        }
869 d2c5f0a4 Michael Niedermayer
870 e471e3c4 Aurelien Jacobs
        //parse stray LIST
871
        if(d[0] == 'L' && d[1] == 'I' && d[2] == 'S' && d[3] == 'T'){
872
            url_fskip(pb, 4);
873
            goto resync;
874
        }
875
876 f080a7bd Michael Niedermayer
        n= get_stream_idx(d);
877 115329f1 Diego Biurrun
878 7ccc636f Michael Niedermayer
        if(!((i-avi->last_pkt_pos)&1) && get_stream_idx(d+1) < s->nb_streams)
879
            continue;
880
881 7305d97f Maksym Veremeyenko
        //detect ##ix chunk and skip
882
        if(d[2] == 'i' && d[3] == 'x' && n < s->nb_streams){
883
            url_fskip(pb, size);
884
            goto resync;
885
        }
886
887 d2c5f0a4 Michael Niedermayer
        //parse ##dc/##wb
888 80e3a08c Michael Niedermayer
        if(n < s->nb_streams){
889 1ce50d32 Michael Niedermayer
            AVStream *st;
890
            AVIStream *ast;
891
            st = s->streams[n];
892
            ast = st->priv_data;
893 41757171 Michael Niedermayer
894 79d6b9cb Michael Niedermayer
            if(s->nb_streams>=2){
895
                AVStream *st1  = s->streams[1];
896
                AVIStream *ast1= st1->priv_data;
897 1ce50d32 Michael Niedermayer
                //workaround for broken small-file-bug402.avi
898
                if(   d[2] == 'w' && d[3] == 'b'
899
                   && n==0
900 72415b2a Stefano Sabatini
                   && st ->codec->codec_type == AVMEDIA_TYPE_VIDEO
901
                   && st1->codec->codec_type == AVMEDIA_TYPE_AUDIO
902 1ce50d32 Michael Niedermayer
                   && ast->prefix == 'd'*256+'c'
903
                   && (d[2]*256+d[3] == ast1->prefix || !ast1->prefix_count)
904
                  ){
905
                    n=1;
906
                    st = st1;
907
                    ast = ast1;
908 15d6e361 Diego Biurrun
                    av_log(s, AV_LOG_WARNING, "Invalid stream + prefix combination, assuming audio.\n");
909 1ce50d32 Michael Niedermayer
                }
910 79d6b9cb Michael Niedermayer
            }
911 41757171 Michael Niedermayer
912
913 1ce50d32 Michael Niedermayer
            if(   (st->discard >= AVDISCARD_DEFAULT && size==0)
914 cc947f04 Jean-Daniel Dupas
               /*|| (st->discard >= AVDISCARD_NONKEY && !(pkt->flags & AV_PKT_FLAG_KEY))*/ //FIXME needs a little reordering
915 1ce50d32 Michael Niedermayer
               || st->discard >= AVDISCARD_ALL){
916 8a472821 Michael Niedermayer
                ast->frame_offset += get_duration(ast, size);
917 b4aea108 Michael Niedermayer
                url_fskip(pb, size);
918
                goto resync;
919 1ce50d32 Michael Niedermayer
            }
920 d2c5f0a4 Michael Niedermayer
921 1ce50d32 Michael Niedermayer
            if (d[2] == 'p' && d[3] == 'c' && size<=4*256+4) {
922 b7c40744 Michael Niedermayer
                int k = get_byte(pb);
923
                int last = (k + get_byte(pb) - 1) & 0xFF;
924
925
                get_le16(pb); //flags
926
927
                for (; k <= last; k++)
928
                    ast->pal[k] = get_be32(pb)>>8;// b + (g << 8) + (r << 16);
929
                ast->has_pal= 1;
930
                goto resync;
931 1ce50d32 Michael Niedermayer
            } else if(   ((ast->prefix_count<5 || sync+9 > i) && d[2]<128 && d[3]<128) ||
932
                         d[2]*256+d[3] == ast->prefix /*||
933
                         (d[2] == 'd' && d[3] == 'c') ||
934
                         (d[2] == 'w' && d[3] == 'b')*/) {
935 d2c5f0a4 Michael Niedermayer
936 87ad63c0 Benoit Fouet
//av_log(s, AV_LOG_DEBUG, "OK\n");
937 1ce50d32 Michael Niedermayer
                if(d[2]*256+d[3] == ast->prefix)
938
                    ast->prefix_count++;
939
                else{
940
                    ast->prefix= d[2]*256+d[3];
941
                    ast->prefix_count= 0;
942
                }
943 d2c5f0a4 Michael Niedermayer
944 1ce50d32 Michael Niedermayer
                avi->stream_index= n;
945
                ast->packet_size= size + 8;
946
                ast->remaining= size;
947 ded3c7da Michael Niedermayer
948 df84d7d9 Michael Niedermayer
                if(size || !ast->sample_size){
949 1ce50d32 Michael Niedermayer
                    uint64_t pos= url_ftell(pb) - 8;
950
                    if(!st->index_entries || !st->nb_index_entries || st->index_entries[st->nb_index_entries - 1].pos < pos){
951 83a4d356 Michael Niedermayer
                        av_add_index_entry(st, pos, ast->frame_offset, size, 0, AVINDEX_KEYFRAME);
952 1ce50d32 Michael Niedermayer
                    }
953 ded3c7da Michael Niedermayer
                }
954 1ce50d32 Michael Niedermayer
                goto resync;
955 ded3c7da Michael Niedermayer
            }
956 df99755b Michael Niedermayer
        }
957
    }
958 d2c5f0a4 Michael Niedermayer
959 1e04bbee Peter Ross
    return AVERROR_EOF;
960 de6d9b64 Fabrice Bellard
}
961
962 15d6e361 Diego Biurrun
/* XXX: We make the implicit supposition that the positions are sorted
963
   for each stream. */
964 155e9ee9 Fabrice Bellard
static int avi_read_idx1(AVFormatContext *s, int size)
965
{
966 7c7f3866 Michael Niedermayer
    AVIContext *avi = s->priv_data;
967 899681cd Björn Axelsson
    ByteIOContext *pb = s->pb;
968 155e9ee9 Fabrice Bellard
    int nb_index_entries, i;
969
    AVStream *st;
970
    AVIStream *ast;
971
    unsigned int index, tag, flags, pos, len;
972 7c7f3866 Michael Niedermayer
    unsigned last_pos= -1;
973 115329f1 Diego Biurrun
974 155e9ee9 Fabrice Bellard
    nb_index_entries = size / 16;
975
    if (nb_index_entries <= 0)
976
        return -1;
977
978 15d6e361 Diego Biurrun
    /* Read the entries and sort them in each stream component. */
979 155e9ee9 Fabrice Bellard
    for(i = 0; i < nb_index_entries; i++) {
980
        tag = get_le32(pb);
981
        flags = get_le32(pb);
982
        pos = get_le32(pb);
983
        len = get_le32(pb);
984 52a0bbff Michael Niedermayer
#if defined(DEBUG_SEEK)
985 87ad63c0 Benoit Fouet
        av_log(s, AV_LOG_DEBUG, "%d: tag=0x%x flags=0x%x pos=0x%x len=%d/",
986 155e9ee9 Fabrice Bellard
               i, tag, flags, pos, len);
987
#endif
988 7c7f3866 Michael Niedermayer
        if(i==0 && pos > avi->movi_list)
989
            avi->movi_list= 0; //FIXME better check
990 5c89153e Michael Niedermayer
        pos += avi->movi_list;
991 7c7f3866 Michael Niedermayer
992 155e9ee9 Fabrice Bellard
        index = ((tag & 0xff) - '0') * 10;
993
        index += ((tag >> 8) & 0xff) - '0';
994
        if (index >= s->nb_streams)
995
            continue;
996
        st = s->streams[index];
997
        ast = st->priv_data;
998 115329f1 Diego Biurrun
999 52a0bbff Michael Niedermayer
#if defined(DEBUG_SEEK)
1000 87ad63c0 Benoit Fouet
        av_log(s, AV_LOG_DEBUG, "%d cum_len=%"PRId64"\n", len, ast->cum_len);
1001 52a0bbff Michael Niedermayer
#endif
1002 8ebe099a Michael Niedermayer
        if(url_feof(pb))
1003
            return -1;
1004
1005 80e3a08c Michael Niedermayer
        if(last_pos == pos)
1006
            avi->non_interleaved= 1;
1007 df84d7d9 Michael Niedermayer
        else if(len || !ast->sample_size)
1008 83a4d356 Michael Niedermayer
            av_add_index_entry(st, pos, ast->cum_len, len, 0, (flags&AVIIF_INDEX) ? AVINDEX_KEYFRAME : 0);
1009 8a472821 Michael Niedermayer
        ast->cum_len += get_duration(ast, len);
1010 7c7f3866 Michael Niedermayer
        last_pos= pos;
1011 155e9ee9 Fabrice Bellard
    }
1012
    return 0;
1013
}
1014
1015 7c7f3866 Michael Niedermayer
static int guess_ni_flag(AVFormatContext *s){
1016
    int i;
1017
    int64_t last_start=0;
1018
    int64_t first_end= INT64_MAX;
1019 8c68f25b Michael Niedermayer
    int64_t oldpos= url_ftell(s->pb);
1020 115329f1 Diego Biurrun
1021 7c7f3866 Michael Niedermayer
    for(i=0; i<s->nb_streams; i++){
1022
        AVStream *st = s->streams[i];
1023
        int n= st->nb_index_entries;
1024 8c68f25b Michael Niedermayer
        unsigned int size;
1025 7c7f3866 Michael Niedermayer
1026
        if(n <= 0)
1027
            continue;
1028
1029 8c68f25b Michael Niedermayer
        if(n >= 2){
1030
            int64_t pos= st->index_entries[0].pos;
1031
            url_fseek(s->pb, pos + 4, SEEK_SET);
1032
            size= get_le32(s->pb);
1033
            if(pos + size > st->index_entries[1].pos)
1034
                last_start= INT64_MAX;
1035
        }
1036
1037 7c7f3866 Michael Niedermayer
        if(st->index_entries[0].pos > last_start)
1038
            last_start= st->index_entries[0].pos;
1039
        if(st->index_entries[n-1].pos < first_end)
1040
            first_end= st->index_entries[n-1].pos;
1041
    }
1042 8c68f25b Michael Niedermayer
    url_fseek(s->pb, oldpos, SEEK_SET);
1043 7c7f3866 Michael Niedermayer
    return last_start > first_end;
1044
}
1045
1046 155e9ee9 Fabrice Bellard
static int avi_load_index(AVFormatContext *s)
1047
{
1048
    AVIContext *avi = s->priv_data;
1049 899681cd Björn Axelsson
    ByteIOContext *pb = s->pb;
1050 155e9ee9 Fabrice Bellard
    uint32_t tag, size;
1051 bc5c918e Diego Biurrun
    int64_t pos= url_ftell(pb);
1052 44ed34b7 Reimar Döffinger
    int ret = -1;
1053 115329f1 Diego Biurrun
1054 44ed34b7 Reimar Döffinger
    if (url_fseek(pb, avi->movi_end, SEEK_SET) < 0)
1055
        goto the_end; // maybe truncated file
1056 155e9ee9 Fabrice Bellard
#ifdef DEBUG_SEEK
1057 949b1a13 Steve L'Homme
    printf("movi_end=0x%"PRIx64"\n", avi->movi_end);
1058 155e9ee9 Fabrice Bellard
#endif
1059
    for(;;) {
1060
        if (url_feof(pb))
1061
            break;
1062
        tag = get_le32(pb);
1063
        size = get_le32(pb);
1064
#ifdef DEBUG_SEEK
1065
        printf("tag=%c%c%c%c size=0x%x\n",
1066
               tag & 0xff,
1067
               (tag >> 8) & 0xff,
1068
               (tag >> 16) & 0xff,
1069
               (tag >> 24) & 0xff,
1070
               size);
1071
#endif
1072
        switch(tag) {
1073
        case MKTAG('i', 'd', 'x', '1'):
1074
            if (avi_read_idx1(s, size) < 0)
1075
                goto skip;
1076 44ed34b7 Reimar Döffinger
            ret = 0;
1077 155e9ee9 Fabrice Bellard
                goto the_end;
1078
            break;
1079
        default:
1080
        skip:
1081
            size += (size & 1);
1082 44ed34b7 Reimar Döffinger
            if (url_fseek(pb, size, SEEK_CUR) < 0)
1083
                goto the_end; // something is wrong here
1084 155e9ee9 Fabrice Bellard
            break;
1085
        }
1086
    }
1087
 the_end:
1088 e6c0297f Michael Niedermayer
    url_fseek(pb, pos, SEEK_SET);
1089 44ed34b7 Reimar Döffinger
    return ret;
1090 155e9ee9 Fabrice Bellard
}
1091
1092 7b3c1382 Michael Niedermayer
static int avi_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
1093 155e9ee9 Fabrice Bellard
{
1094
    AVIContext *avi = s->priv_data;
1095
    AVStream *st;
1096 52a0bbff Michael Niedermayer
    int i, index;
1097 155e9ee9 Fabrice Bellard
    int64_t pos;
1098 83a4d356 Michael Niedermayer
    AVIStream *ast;
1099 155e9ee9 Fabrice Bellard
1100
    if (!avi->index_loaded) {
1101
        /* we only load the index on demand */
1102
        avi_load_index(s);
1103
        avi->index_loaded = 1;
1104
    }
1105 52a0bbff Michael Niedermayer
    assert(stream_index>= 0);
1106 155e9ee9 Fabrice Bellard
1107
    st = s->streams[stream_index];
1108 83a4d356 Michael Niedermayer
    ast= st->priv_data;
1109
    index= av_index_search_timestamp(st, timestamp * FFMAX(ast->sample_size, 1), flags);
1110 52a0bbff Michael Niedermayer
    if(index<0)
1111 155e9ee9 Fabrice Bellard
        return -1;
1112 115329f1 Diego Biurrun
1113 155e9ee9 Fabrice Bellard
    /* find the position */
1114 52a0bbff Michael Niedermayer
    pos = st->index_entries[index].pos;
1115 83a4d356 Michael Niedermayer
    timestamp = st->index_entries[index].timestamp / FFMAX(ast->sample_size, 1);
1116 52a0bbff Michael Niedermayer
1117 87ad63c0 Benoit Fouet
//    av_log(s, AV_LOG_DEBUG, "XX %"PRId64" %d %"PRId64"\n", timestamp, index, st->index_entries[index].timestamp);
1118 155e9ee9 Fabrice Bellard
1119 49fb20cb Aurelien Jacobs
    if (CONFIG_DV_DEMUXER && avi->dv_demux) {
1120 6eb2de74 Roman Shaposhnik
        /* One and only one real stream for DV in AVI, and it has video  */
1121 f4433de9 Diego Biurrun
        /* offsets. Calling with other stream indexes should have failed */
1122 6eb2de74 Roman Shaposhnik
        /* the av_index_search_timestamp call above.                     */
1123
        assert(stream_index == 0);
1124
1125
        /* Feed the DV video stream version of the timestamp to the */
1126 15d6e361 Diego Biurrun
        /* DV demux so it can synthesize correct timestamps.        */
1127 6eb2de74 Roman Shaposhnik
        dv_offset_reset(avi->dv_demux, timestamp);
1128
1129 899681cd Björn Axelsson
        url_fseek(s->pb, pos, SEEK_SET);
1130 6eb2de74 Roman Shaposhnik
        avi->stream_index= -1;
1131
        return 0;
1132
    }
1133
1134 155e9ee9 Fabrice Bellard
    for(i = 0; i < s->nb_streams; i++) {
1135 52a0bbff Michael Niedermayer
        AVStream *st2 = s->streams[i];
1136
        AVIStream *ast2 = st2->priv_data;
1137 7c7f3866 Michael Niedermayer
1138
        ast2->packet_size=
1139
        ast2->remaining= 0;
1140
1141 52a0bbff Michael Niedermayer
        if (st2->nb_index_entries <= 0)
1142
            continue;
1143 115329f1 Diego Biurrun
1144 e84dab5f Michael Niedermayer
//        assert(st2->codec->block_align);
1145 62f25230 Baptiste Coudurier
        assert((int64_t)st2->time_base.num*ast2->rate == (int64_t)st2->time_base.den*ast2->scale);
1146 52a0bbff Michael Niedermayer
        index = av_index_search_timestamp(
1147 115329f1 Diego Biurrun
                st2,
1148 83a4d356 Michael Niedermayer
                av_rescale_q(timestamp, st->time_base, st2->time_base) * FFMAX(ast2->sample_size, 1),
1149 52a0bbff Michael Niedermayer
                flags | AVSEEK_FLAG_BACKWARD);
1150
        if(index<0)
1151
            index=0;
1152 115329f1 Diego Biurrun
1153 7c7f3866 Michael Niedermayer
        if(!avi->non_interleaved){
1154
            while(index>0 && st2->index_entries[index].pos > pos)
1155
                index--;
1156
            while(index+1 < st2->nb_index_entries && st2->index_entries[index].pos < pos)
1157
                index++;
1158
        }
1159
1160 87ad63c0 Benoit Fouet
//        av_log(s, AV_LOG_DEBUG, "%"PRId64" %d %"PRId64"\n", timestamp, index, st2->index_entries[index].timestamp);
1161 52a0bbff Michael Niedermayer
        /* extract the current frame number */
1162
        ast2->frame_offset = st2->index_entries[index].timestamp;
1163 155e9ee9 Fabrice Bellard
    }
1164 52a0bbff Michael Niedermayer
1165 155e9ee9 Fabrice Bellard
    /* do the seek */
1166 899681cd Björn Axelsson
    url_fseek(s->pb, pos, SEEK_SET);
1167 7c7f3866 Michael Niedermayer
    avi->stream_index= -1;
1168 155e9ee9 Fabrice Bellard
    return 0;
1169
}
1170
1171 1101abfe Zdenek Kabelac
static int avi_read_close(AVFormatContext *s)
1172 de6d9b64 Fabrice Bellard
{
1173 5ae2c73e Michael Niedermayer
    int i;
1174
    AVIContext *avi = s->priv_data;
1175
1176
    for(i=0;i<s->nb_streams;i++) {
1177
        AVStream *st = s->streams[i];
1178 01f4895c Michael Niedermayer
        av_free(st->codec->palctrl);
1179 5ae2c73e Michael Niedermayer
    }
1180
1181 7458ccbb Roman Shaposhnik
    if (avi->dv_demux)
1182
        av_free(avi->dv_demux);
1183
1184 c9a65ca8 Fabrice Bellard
    return 0;
1185
}
1186
1187
static int avi_probe(AVProbeData *p)
1188
{
1189 7b31b092 Aurelien Jacobs
    int i;
1190
1191 c9a65ca8 Fabrice Bellard
    /* check file header */
1192 7b31b092 Aurelien Jacobs
    for(i=0; avi_headers[i][0]; i++)
1193
        if(!memcmp(p->buf  , avi_headers[i]  , 4) &&
1194
           !memcmp(p->buf+8, avi_headers[i]+4, 4))
1195
            return AVPROBE_SCORE_MAX;
1196
1197
    return 0;
1198 c9a65ca8 Fabrice Bellard
}
1199
1200 ff70e601 Måns Rullgård
AVInputFormat avi_demuxer = {
1201 c9a65ca8 Fabrice Bellard
    "avi",
1202 bde15e74 Stefano Sabatini
    NULL_IF_CONFIG_SMALL("AVI format"),
1203 c9a65ca8 Fabrice Bellard
    sizeof(AVIContext),
1204
    avi_probe,
1205
    avi_read_header,
1206
    avi_read_packet,
1207
    avi_read_close,
1208 155e9ee9 Fabrice Bellard
    avi_read_seek,
1209 04d2540c Anton Khirnov
    .metadata_conv = ff_avi_metadata_conv,
1210 c9a65ca8 Fabrice Bellard
};