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ffmpeg / libavformat / avienc.c @ 47146dfb

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1
/*
2
 * AVI muxer
3
 * Copyright (c) 2000 Fabrice Bellard.
4
 *
5
 * This file is part of FFmpeg.
6
 *
7
 * FFmpeg is free software; you can redistribute it and/or
8
 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
10
 * 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,
13
 * 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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 */
21
#include "avformat.h"
22
#include "avi.h"
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#include "riff.h"
24

    
25
/*
26
 * TODO:
27
 *  - fill all fields if non streamed (nb_frames for example)
28
 */
29

    
30
#ifdef CONFIG_AVI_MUXER
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typedef struct AVIIentry {
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    unsigned int flags, pos, len;
33
} AVIIentry;
34

    
35
#define AVI_INDEX_CLUSTER_SIZE 16384
36

    
37
typedef struct AVIIndex {
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    int64_t     indx_start;
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    int         entry;
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    int         ents_allocated;
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    AVIIentry** cluster;
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} AVIIndex;
43

    
44
typedef struct {
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    int64_t riff_start, movi_list, odml_list;
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    int64_t frames_hdr_all, frames_hdr_strm[MAX_STREAMS];
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    int audio_strm_length[MAX_STREAMS];
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    int riff_id;
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    int packet_count[MAX_STREAMS];
50

    
51
    AVIIndex indexes[MAX_STREAMS];
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} AVIContext;
53

    
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static inline AVIIentry* avi_get_ientry(AVIIndex* idx, int ent_id)
55
{
56
    int cl = ent_id / AVI_INDEX_CLUSTER_SIZE;
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    int id = ent_id % AVI_INDEX_CLUSTER_SIZE;
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    return &idx->cluster[cl][id];
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}
60

    
61
static int64_t avi_start_new_riff(AVIContext *avi, ByteIOContext *pb,
62
                                  const char* riff_tag, const char* list_tag)
63
{
64
    int64_t loff;
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    int i;
66

    
67
    avi->riff_id++;
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    for (i=0; i<MAX_STREAMS; i++)
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         avi->indexes[i].entry = 0;
70

    
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    avi->riff_start = start_tag(pb, "RIFF");
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    put_tag(pb, riff_tag);
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    loff = start_tag(pb, "LIST");
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    put_tag(pb, list_tag);
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    return loff;
76
}
77

    
78
static char* avi_stream2fourcc(char* tag, int index, enum CodecType type)
79
{
80
    tag[0] = '0';
81
    tag[1] = '0' + index;
82
    if (type == CODEC_TYPE_VIDEO) {
83
        tag[2] = 'd';
84
        tag[3] = 'c';
85
    } else {
86
        tag[2] = 'w';
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        tag[3] = 'b';
88
    }
89
    tag[4] = '\0';
90
    return tag;
91
}
92

    
93
static void avi_write_info_tag(ByteIOContext *pb, const char *tag, const char *str)
94
{
95
    int len = strlen(str);
96
    if (len > 0) {
97
        len++;
98
        put_tag(pb, tag);
99
        put_le32(pb, len);
100
        put_strz(pb, str);
101
        if (len & 1)
102
            put_byte(pb, 0);
103
    }
104
}
105

    
106
static void avi_write_info_tag2(AVFormatContext *s, const char *fourcc, const char *key1, const char *key2)
107
{
108
    AVMetaDataTag *tag= av_metadata_get(s->meta_data, key1, NULL, AV_METADATA_IGNORE_CASE);
109
    if(!tag && key2)
110
        tag= av_metadata_get(s->meta_data, key2, NULL, AV_METADATA_IGNORE_CASE);
111
    if(tag)
112
        avi_write_info_tag(s->pb, fourcc, tag->value);
113
}
114

    
115
static int avi_write_counters(AVFormatContext* s, int riff_id)
116
{
117
    ByteIOContext *pb = s->pb;
118
    AVIContext *avi = s->priv_data;
119
    int n, au_byterate, au_ssize, au_scale, nb_frames = 0;
120
    int64_t file_size;
121
    AVCodecContext* stream;
122

    
123
    file_size = url_ftell(pb);
124
    for(n = 0; n < s->nb_streams; n++) {
125
        assert(avi->frames_hdr_strm[n]);
126
        stream = s->streams[n]->codec;
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        url_fseek(pb, avi->frames_hdr_strm[n], SEEK_SET);
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        ff_parse_specific_params(stream, &au_byterate, &au_ssize, &au_scale);
129
        if(au_ssize == 0) {
130
            put_le32(pb, avi->packet_count[n]);
131
        } else {
132
            put_le32(pb, avi->audio_strm_length[n] / au_ssize);
133
        }
134
        if(stream->codec_type == CODEC_TYPE_VIDEO)
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            nb_frames = FFMAX(nb_frames, avi->packet_count[n]);
136
    }
137
    if(riff_id == 1) {
138
        assert(avi->frames_hdr_all);
139
        url_fseek(pb, avi->frames_hdr_all, SEEK_SET);
140
        put_le32(pb, nb_frames);
141
    }
142
    url_fseek(pb, file_size, SEEK_SET);
143

    
144
    return 0;
145
}
146

    
147
static int avi_write_header(AVFormatContext *s)
148
{
149
    AVIContext *avi = s->priv_data;
150
    ByteIOContext *pb = s->pb;
151
    int bitrate, n, i, nb_frames, au_byterate, au_ssize, au_scale;
152
    AVCodecContext *stream, *video_enc;
153
    int64_t list1, list2, strh, strf;
154

    
155
    /* header list */
156
    avi->riff_id = 0;
157
    list1 = avi_start_new_riff(avi, pb, "AVI ", "hdrl");
158

    
159
    /* avi header */
160
    put_tag(pb, "avih");
161
    put_le32(pb, 14 * 4);
162
    bitrate = 0;
163

    
164
    video_enc = NULL;
165
    for(n=0;n<s->nb_streams;n++) {
166
        stream = s->streams[n]->codec;
167
        bitrate += stream->bit_rate;
168
        if (stream->codec_type == CODEC_TYPE_VIDEO)
169
            video_enc = stream;
170
    }
171

    
172
    nb_frames = 0;
173

    
174
    if(video_enc){
175
        put_le32(pb, (uint32_t)(INT64_C(1000000) * video_enc->time_base.num / video_enc->time_base.den));
176
    } else {
177
        put_le32(pb, 0);
178
    }
179
    put_le32(pb, bitrate / 8); /* XXX: not quite exact */
180
    put_le32(pb, 0); /* padding */
181
    if (url_is_streamed(pb))
182
        put_le32(pb, AVIF_TRUSTCKTYPE | AVIF_ISINTERLEAVED); /* flags */
183
    else
184
        put_le32(pb, AVIF_TRUSTCKTYPE | AVIF_HASINDEX | AVIF_ISINTERLEAVED); /* flags */
185
    avi->frames_hdr_all = url_ftell(pb); /* remember this offset to fill later */
186
    put_le32(pb, nb_frames); /* nb frames, filled later */
187
    put_le32(pb, 0); /* initial frame */
188
    put_le32(pb, s->nb_streams); /* nb streams */
189
    put_le32(pb, 1024 * 1024); /* suggested buffer size */
190
    if(video_enc){
191
        put_le32(pb, video_enc->width);
192
        put_le32(pb, video_enc->height);
193
    } else {
194
        put_le32(pb, 0);
195
        put_le32(pb, 0);
196
    }
197
    put_le32(pb, 0); /* reserved */
198
    put_le32(pb, 0); /* reserved */
199
    put_le32(pb, 0); /* reserved */
200
    put_le32(pb, 0); /* reserved */
201

    
202
    /* stream list */
203
    for(i=0;i<n;i++) {
204
        list2 = start_tag(pb, "LIST");
205
        put_tag(pb, "strl");
206

    
207
        stream = s->streams[i]->codec;
208

    
209
        /* stream generic header */
210
        strh = start_tag(pb, "strh");
211
        switch(stream->codec_type) {
212
        case CODEC_TYPE_VIDEO: put_tag(pb, "vids"); break;
213
        case CODEC_TYPE_AUDIO: put_tag(pb, "auds"); break;
214
//        case CODEC_TYPE_TEXT : put_tag(pb, "txts"); break;
215
        case CODEC_TYPE_DATA : put_tag(pb, "dats"); break;
216
        }
217
        if(stream->codec_type == CODEC_TYPE_VIDEO)
218
            put_le32(pb, stream->codec_tag);
219
        else
220
            put_le32(pb, 1);
221
        put_le32(pb, 0); /* flags */
222
        put_le16(pb, 0); /* priority */
223
        put_le16(pb, 0); /* language */
224
        put_le32(pb, 0); /* initial frame */
225

    
226
        ff_parse_specific_params(stream, &au_byterate, &au_ssize, &au_scale);
227

    
228
        put_le32(pb, au_scale); /* scale */
229
        put_le32(pb, au_byterate); /* rate */
230
        av_set_pts_info(s->streams[i], 64, au_scale, au_byterate);
231

    
232
        put_le32(pb, 0); /* start */
233
        avi->frames_hdr_strm[i] = url_ftell(pb); /* remember this offset to fill later */
234
        if (url_is_streamed(pb))
235
            put_le32(pb, AVI_MAX_RIFF_SIZE); /* FIXME: this may be broken, but who cares */
236
        else
237
            put_le32(pb, 0); /* length, XXX: filled later */
238

    
239
        /* suggested buffer size */ //FIXME set at the end to largest chunk
240
        if(stream->codec_type == CODEC_TYPE_VIDEO)
241
            put_le32(pb, 1024 * 1024);
242
        else if(stream->codec_type == CODEC_TYPE_AUDIO)
243
            put_le32(pb, 12 * 1024);
244
        else
245
            put_le32(pb, 0);
246
        put_le32(pb, -1); /* quality */
247
        put_le32(pb, au_ssize); /* sample size */
248
        put_le32(pb, 0);
249
        put_le16(pb, stream->width);
250
        put_le16(pb, stream->height);
251
        end_tag(pb, strh);
252

    
253
      if(stream->codec_type != CODEC_TYPE_DATA){
254
        strf = start_tag(pb, "strf");
255
        switch(stream->codec_type) {
256
        case CODEC_TYPE_VIDEO:
257
            put_bmp_header(pb, stream, codec_bmp_tags, 0);
258
            break;
259
        case CODEC_TYPE_AUDIO:
260
            if (put_wav_header(pb, stream) < 0) {
261
                return -1;
262
            }
263
            break;
264
        default:
265
            return -1;
266
        }
267
        end_tag(pb, strf);
268
      }
269

    
270
        if (!url_is_streamed(pb)) {
271
            unsigned char tag[5];
272
            int j;
273

    
274
            /* Starting to lay out AVI OpenDML master index.
275
             * We want to make it JUNK entry for now, since we'd
276
             * like to get away without making AVI an OpenDML one
277
             * for compatibility reasons.
278
             */
279
            avi->indexes[i].entry = avi->indexes[i].ents_allocated = 0;
280
            avi->indexes[i].indx_start = start_tag(pb, "JUNK");
281
            put_le16(pb, 4);        /* wLongsPerEntry */
282
            put_byte(pb, 0);        /* bIndexSubType (0 == frame index) */
283
            put_byte(pb, 0);        /* bIndexType (0 == AVI_INDEX_OF_INDEXES) */
284
            put_le32(pb, 0);        /* nEntriesInUse (will fill out later on) */
285
            put_tag(pb, avi_stream2fourcc(&tag[0], i, stream->codec_type));
286
                                    /* dwChunkId */
287
            put_le64(pb, 0);        /* dwReserved[3]
288
            put_le32(pb, 0);           Must be 0.    */
289
            for (j=0; j < AVI_MASTER_INDEX_SIZE * 2; j++)
290
                 put_le64(pb, 0);
291
            end_tag(pb, avi->indexes[i].indx_start);
292
        }
293

    
294
        if(   stream->codec_type == CODEC_TYPE_VIDEO
295
           && s->streams[i]->sample_aspect_ratio.num>0
296
           && s->streams[i]->sample_aspect_ratio.den>0){
297
            int vprp= start_tag(pb, "vprp");
298
            AVRational dar = av_mul_q(s->streams[i]->sample_aspect_ratio,
299
                                      (AVRational){stream->width, stream->height});
300
            int num, den;
301
            av_reduce(&num, &den, dar.num, dar.den, 0xFFFF);
302

    
303
            put_le32(pb, 0); //video format  = unknown
304
            put_le32(pb, 0); //video standard= unknown
305
            put_le32(pb, lrintf(1.0/av_q2d(stream->time_base)));
306
            put_le32(pb, stream->width );
307
            put_le32(pb, stream->height);
308
            put_le16(pb, den);
309
            put_le16(pb, num);
310
            put_le32(pb, stream->width );
311
            put_le32(pb, stream->height);
312
            put_le32(pb, 1); //progressive FIXME
313

    
314
            put_le32(pb, stream->height);
315
            put_le32(pb, stream->width );
316
            put_le32(pb, stream->height);
317
            put_le32(pb, stream->width );
318
            put_le32(pb, 0);
319
            put_le32(pb, 0);
320

    
321
            put_le32(pb, 0);
322
            put_le32(pb, 0);
323
            end_tag(pb, vprp);
324
        }
325

    
326
        end_tag(pb, list2);
327
    }
328

    
329
    if (!url_is_streamed(pb)) {
330
        /* AVI could become an OpenDML one, if it grows beyond 2Gb range */
331
        avi->odml_list = start_tag(pb, "JUNK");
332
        put_tag(pb, "odml");
333
        put_tag(pb, "dmlh");
334
        put_le32(pb, 248);
335
        for (i = 0; i < 248; i+= 4)
336
             put_le32(pb, 0);
337
        end_tag(pb, avi->odml_list);
338
    }
339

    
340
    end_tag(pb, list1);
341

    
342
    list2 = start_tag(pb, "LIST");
343
    put_tag(pb, "INFO");
344
    avi_write_info_tag2(s, "INAM", "Title", NULL);
345
    avi_write_info_tag2(s, "IART", "Artist", "Author");
346
    avi_write_info_tag2(s, "ICOP", "Copyright", NULL);
347
    avi_write_info_tag2(s, "ICMT", "Comment", NULL);
348
    avi_write_info_tag2(s, "IPRD", "Album", NULL);
349
    avi_write_info_tag2(s, "IGNR", "Genre", NULL);
350
    avi_write_info_tag2(s, "IPRT", "Track", NULL);
351
    if(!(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT))
352
        avi_write_info_tag(pb, "ISFT", LIBAVFORMAT_IDENT);
353
    end_tag(pb, list2);
354

    
355
    /* some padding for easier tag editing */
356
    list2 = start_tag(pb, "JUNK");
357
    for (i = 0; i < 1016; i += 4)
358
        put_le32(pb, 0);
359
    end_tag(pb, list2);
360

    
361
    avi->movi_list = start_tag(pb, "LIST");
362
    put_tag(pb, "movi");
363

    
364
    put_flush_packet(pb);
365

    
366
    return 0;
367
}
368

    
369
static int avi_write_ix(AVFormatContext *s)
370
{
371
    ByteIOContext *pb = s->pb;
372
    AVIContext *avi = s->priv_data;
373
    char tag[5];
374
    char ix_tag[] = "ix00";
375
    int i, j;
376

    
377
    assert(!url_is_streamed(pb));
378

    
379
    if (avi->riff_id > AVI_MASTER_INDEX_SIZE)
380
        return -1;
381

    
382
    for (i=0;i<s->nb_streams;i++) {
383
         int64_t ix, pos;
384

    
385
         avi_stream2fourcc(&tag[0], i, s->streams[i]->codec->codec_type);
386
         ix_tag[3] = '0' + i;
387

    
388
         /* Writing AVI OpenDML leaf index chunk */
389
         ix = url_ftell(pb);
390
         put_tag(pb, &ix_tag[0]);     /* ix?? */
391
         put_le32(pb, avi->indexes[i].entry * 8 + 24);
392
                                      /* chunk size */
393
         put_le16(pb, 2);             /* wLongsPerEntry */
394
         put_byte(pb, 0);             /* bIndexSubType (0 == frame index) */
395
         put_byte(pb, 1);             /* bIndexType (1 == AVI_INDEX_OF_CHUNKS) */
396
         put_le32(pb, avi->indexes[i].entry);
397
                                      /* nEntriesInUse */
398
         put_tag(pb, &tag[0]);        /* dwChunkId */
399
         put_le64(pb, avi->movi_list);/* qwBaseOffset */
400
         put_le32(pb, 0);             /* dwReserved_3 (must be 0) */
401

    
402
         for (j=0; j<avi->indexes[i].entry; j++) {
403
             AVIIentry* ie = avi_get_ientry(&avi->indexes[i], j);
404
             put_le32(pb, ie->pos + 8);
405
             put_le32(pb, ((uint32_t)ie->len & ~0x80000000) |
406
                          (ie->flags & 0x10 ? 0 : 0x80000000));
407
         }
408
         put_flush_packet(pb);
409
         pos = url_ftell(pb);
410

    
411
         /* Updating one entry in the AVI OpenDML master index */
412
         url_fseek(pb, avi->indexes[i].indx_start - 8, SEEK_SET);
413
         put_tag(pb, "indx");                 /* enabling this entry */
414
         url_fskip(pb, 8);
415
         put_le32(pb, avi->riff_id);          /* nEntriesInUse */
416
         url_fskip(pb, 16*avi->riff_id);
417
         put_le64(pb, ix);                    /* qwOffset */
418
         put_le32(pb, pos - ix);              /* dwSize */
419
         put_le32(pb, avi->indexes[i].entry); /* dwDuration */
420

    
421
         url_fseek(pb, pos, SEEK_SET);
422
    }
423
    return 0;
424
}
425

    
426
static int avi_write_idx1(AVFormatContext *s)
427
{
428
    ByteIOContext *pb = s->pb;
429
    AVIContext *avi = s->priv_data;
430
    int64_t idx_chunk;
431
    int i;
432
    char tag[5];
433

    
434
    if (!url_is_streamed(pb)) {
435
        AVIIentry* ie = 0, *tie;
436
        int entry[MAX_STREAMS];
437
        int empty, stream_id = -1;
438

    
439
        idx_chunk = start_tag(pb, "idx1");
440
        memset(&entry[0], 0, sizeof(entry));
441
        do {
442
            empty = 1;
443
            for (i=0; i<s->nb_streams; i++) {
444
                 if (avi->indexes[i].entry <= entry[i])
445
                     continue;
446

    
447
                 tie = avi_get_ientry(&avi->indexes[i], entry[i]);
448
                 if (empty || tie->pos < ie->pos) {
449
                     ie = tie;
450
                     stream_id = i;
451
                 }
452
                 empty = 0;
453
            }
454
            if (!empty) {
455
                avi_stream2fourcc(&tag[0], stream_id,
456
                                  s->streams[stream_id]->codec->codec_type);
457
                put_tag(pb, &tag[0]);
458
                put_le32(pb, ie->flags);
459
                put_le32(pb, ie->pos);
460
                put_le32(pb, ie->len);
461
                entry[stream_id]++;
462
            }
463
        } while (!empty);
464
        end_tag(pb, idx_chunk);
465

    
466
        avi_write_counters(s, avi->riff_id);
467
    }
468
    return 0;
469
}
470

    
471
static int avi_write_packet(AVFormatContext *s, AVPacket *pkt)
472
{
473
    AVIContext *avi = s->priv_data;
474
    ByteIOContext *pb = s->pb;
475
    unsigned char tag[5];
476
    unsigned int flags=0;
477
    const int stream_index= pkt->stream_index;
478
    AVCodecContext *enc= s->streams[stream_index]->codec;
479
    int size= pkt->size;
480

    
481
//    av_log(s, AV_LOG_DEBUG, "%"PRId64" %d %d\n", pkt->dts, avi->packet_count[stream_index], stream_index);
482
    while(enc->block_align==0 && pkt->dts != AV_NOPTS_VALUE && pkt->dts > avi->packet_count[stream_index]){
483
        AVPacket empty_packet;
484

    
485
        av_init_packet(&empty_packet);
486
        empty_packet.size= 0;
487
        empty_packet.data= NULL;
488
        empty_packet.stream_index= stream_index;
489
        avi_write_packet(s, &empty_packet);
490
//        av_log(s, AV_LOG_DEBUG, "dup %"PRId64" %d\n", pkt->dts, avi->packet_count[stream_index]);
491
    }
492
    avi->packet_count[stream_index]++;
493

    
494
    // Make sure to put an OpenDML chunk when the file size exceeds the limits
495
    if (!url_is_streamed(pb) &&
496
        (url_ftell(pb) - avi->riff_start > AVI_MAX_RIFF_SIZE)) {
497

    
498
        avi_write_ix(s);
499
        end_tag(pb, avi->movi_list);
500

    
501
        if (avi->riff_id == 1)
502
            avi_write_idx1(s);
503

    
504
        end_tag(pb, avi->riff_start);
505
        avi->movi_list = avi_start_new_riff(avi, pb, "AVIX", "movi");
506
    }
507

    
508
    avi_stream2fourcc(&tag[0], stream_index, enc->codec_type);
509
    if(pkt->flags&PKT_FLAG_KEY)
510
        flags = 0x10;
511
    if (enc->codec_type == CODEC_TYPE_AUDIO) {
512
       avi->audio_strm_length[stream_index] += size;
513
    }
514

    
515
    if (!url_is_streamed(s->pb)) {
516
        AVIIndex* idx = &avi->indexes[stream_index];
517
        int cl = idx->entry / AVI_INDEX_CLUSTER_SIZE;
518
        int id = idx->entry % AVI_INDEX_CLUSTER_SIZE;
519
        if (idx->ents_allocated <= idx->entry) {
520
            idx->cluster = av_realloc(idx->cluster, (cl+1)*sizeof(void*));
521
            if (!idx->cluster)
522
                return -1;
523
            idx->cluster[cl] = av_malloc(AVI_INDEX_CLUSTER_SIZE*sizeof(AVIIentry));
524
            if (!idx->cluster[cl])
525
                return -1;
526
            idx->ents_allocated += AVI_INDEX_CLUSTER_SIZE;
527
        }
528

    
529
        idx->cluster[cl][id].flags = flags;
530
        idx->cluster[cl][id].pos = url_ftell(pb) - avi->movi_list;
531
        idx->cluster[cl][id].len = size;
532
        idx->entry++;
533
    }
534

    
535
    put_buffer(pb, tag, 4);
536
    put_le32(pb, size);
537
    put_buffer(pb, pkt->data, size);
538
    if (size & 1)
539
        put_byte(pb, 0);
540

    
541
    put_flush_packet(pb);
542
    return 0;
543
}
544

    
545
static int avi_write_trailer(AVFormatContext *s)
546
{
547
    AVIContext *avi = s->priv_data;
548
    ByteIOContext *pb = s->pb;
549
    int res = 0;
550
    int i, j, n, nb_frames;
551
    int64_t file_size;
552

    
553
    if (!url_is_streamed(pb)){
554
        if (avi->riff_id == 1) {
555
            end_tag(pb, avi->movi_list);
556
            res = avi_write_idx1(s);
557
            end_tag(pb, avi->riff_start);
558
        } else {
559
            avi_write_ix(s);
560
            end_tag(pb, avi->movi_list);
561
            end_tag(pb, avi->riff_start);
562

    
563
            file_size = url_ftell(pb);
564
            url_fseek(pb, avi->odml_list - 8, SEEK_SET);
565
            put_tag(pb, "LIST"); /* Making this AVI OpenDML one */
566
            url_fskip(pb, 16);
567

    
568
            for (n=nb_frames=0;n<s->nb_streams;n++) {
569
                AVCodecContext *stream = s->streams[n]->codec;
570
                if (stream->codec_type == CODEC_TYPE_VIDEO) {
571
                    if (nb_frames < avi->packet_count[n])
572
                        nb_frames = avi->packet_count[n];
573
                } else {
574
                    if (stream->codec_id == CODEC_ID_MP2 || stream->codec_id == CODEC_ID_MP3) {
575
                        nb_frames += avi->packet_count[n];
576
                    }
577
                }
578
            }
579
            put_le32(pb, nb_frames);
580
            url_fseek(pb, file_size, SEEK_SET);
581

    
582
            avi_write_counters(s, avi->riff_id);
583
        }
584
    }
585
    put_flush_packet(pb);
586

    
587
    for (i=0; i<MAX_STREAMS; i++) {
588
         for (j=0; j<avi->indexes[i].ents_allocated/AVI_INDEX_CLUSTER_SIZE; j++)
589
              av_free(avi->indexes[i].cluster[j]);
590
         av_free(avi->indexes[i].cluster);
591
         avi->indexes[i].cluster = NULL;
592
         avi->indexes[i].ents_allocated = avi->indexes[i].entry = 0;
593
    }
594

    
595
    return res;
596
}
597

    
598
AVOutputFormat avi_muxer = {
599
    "avi",
600
    NULL_IF_CONFIG_SMALL("AVI format"),
601
    "video/x-msvideo",
602
    "avi",
603
    sizeof(AVIContext),
604
    CODEC_ID_MP2,
605
    CODEC_ID_MPEG4,
606
    avi_write_header,
607
    avi_write_packet,
608
    avi_write_trailer,
609
    .codec_tag= (const AVCodecTag* const []){codec_bmp_tags, codec_wav_tags, 0},
610
};
611
#endif //CONFIG_AVI_MUXER