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ffmpeg / libavformat / avienc.c @ 04d2540c

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1
/*
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 * AVI muxer
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 * Copyright (c) 2000 Fabrice Bellard
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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
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 * 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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 */
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#include "avformat.h"
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#include "avi.h"
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#include "riff.h"
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#include "libavutil/intreadwrite.h"
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26
/*
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 * TODO:
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 *  - fill all fields if non streamed (nb_frames for example)
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 */
30

    
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typedef struct AVIIentry {
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    unsigned int flags, pos, len;
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} AVIIentry;
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#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;
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44
typedef struct {
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    int64_t riff_start, movi_list, odml_list;
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    int64_t frames_hdr_all;
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    int riff_id;
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} AVIContext;
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typedef struct  {
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    int64_t frames_hdr_strm;
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    int audio_strm_length;
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    int packet_count;
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    int entry;
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    AVIIndex indexes;
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} AVIStream ;
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static inline AVIIentry* avi_get_ientry(AVIIndex* idx, int ent_id)
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{
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    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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}
65

    
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static int64_t avi_start_new_riff(AVFormatContext *s, ByteIOContext *pb,
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                                  const char* riff_tag, const char* list_tag)
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{
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    AVIContext *avi= s->priv_data;
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    int64_t loff;
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    int i;
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    avi->riff_id++;
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    for (i=0; i<s->nb_streams; i++){
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        AVIStream *avist= s->streams[i]->priv_data;
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        avist->indexes.entry = 0;
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    }
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    avi->riff_start = ff_start_tag(pb, "RIFF");
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    put_tag(pb, riff_tag);
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    loff = ff_start_tag(pb, "LIST");
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    put_tag(pb, list_tag);
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    return loff;
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}
85

    
86
static char* avi_stream2fourcc(char* tag, int index, enum CodecType type)
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{
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    tag[0] = '0';
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    tag[1] = '0' + index;
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    if (type == CODEC_TYPE_VIDEO) {
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        tag[2] = 'd';
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        tag[3] = 'c';
93
    } else if (type == CODEC_TYPE_SUBTITLE) {
94
        // note: this is not an official code
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        tag[2] = 's';
96
        tag[3] = 'b';
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    } else {
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        tag[2] = 'w';
99
        tag[3] = 'b';
100
    }
101
    tag[4] = '\0';
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    return tag;
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}
104

    
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static void avi_write_info_tag(ByteIOContext *pb, const char *tag, const char *str)
106
{
107
    int len = strlen(str);
108
    if (len > 0) {
109
        len++;
110
        put_tag(pb, tag);
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        put_le32(pb, len);
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        put_strz(pb, str);
113
        if (len & 1)
114
            put_byte(pb, 0);
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    }
116
}
117

    
118
static int avi_write_counters(AVFormatContext* s, int riff_id)
119
{
120
    ByteIOContext *pb = s->pb;
121
    AVIContext *avi = s->priv_data;
122
    int n, au_byterate, au_ssize, au_scale, nb_frames = 0;
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    int64_t file_size;
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    AVCodecContext* stream;
125

    
126
    file_size = url_ftell(pb);
127
    for(n = 0; n < s->nb_streams; n++) {
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        AVIStream *avist= s->streams[n]->priv_data;
129

    
130
        assert(avist->frames_hdr_strm);
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        stream = s->streams[n]->codec;
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        url_fseek(pb, avist->frames_hdr_strm, SEEK_SET);
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        ff_parse_specific_params(stream, &au_byterate, &au_ssize, &au_scale);
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        if(au_ssize == 0) {
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            put_le32(pb, avist->packet_count);
136
        } else {
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            put_le32(pb, avist->audio_strm_length / au_ssize);
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        }
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        if(stream->codec_type == CODEC_TYPE_VIDEO)
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            nb_frames = FFMAX(nb_frames, avist->packet_count);
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    }
142
    if(riff_id == 1) {
143
        assert(avi->frames_hdr_all);
144
        url_fseek(pb, avi->frames_hdr_all, SEEK_SET);
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        put_le32(pb, nb_frames);
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    }
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    url_fseek(pb, file_size, SEEK_SET);
148

    
149
    return 0;
150
}
151

    
152
static int avi_write_header(AVFormatContext *s)
153
{
154
    AVIContext *avi = s->priv_data;
155
    ByteIOContext *pb = s->pb;
156
    int bitrate, n, i, nb_frames, au_byterate, au_ssize, au_scale;
157
    AVCodecContext *stream, *video_enc;
158
    int64_t list1, list2, strh, strf;
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    AVMetadataTag *t = NULL;
160

    
161
    for(n=0;n<s->nb_streams;n++) {
162
        s->streams[n]->priv_data= av_mallocz(sizeof(AVIStream));
163
        if(!s->streams[n]->priv_data)
164
            return AVERROR(ENOMEM);
165
    }
166

    
167
    /* header list */
168
    avi->riff_id = 0;
169
    list1 = avi_start_new_riff(s, pb, "AVI ", "hdrl");
170

    
171
    /* avi header */
172
    put_tag(pb, "avih");
173
    put_le32(pb, 14 * 4);
174
    bitrate = 0;
175

    
176
    video_enc = NULL;
177
    for(n=0;n<s->nb_streams;n++) {
178
        stream = s->streams[n]->codec;
179
        bitrate += stream->bit_rate;
180
        if (stream->codec_type == CODEC_TYPE_VIDEO)
181
            video_enc = stream;
182
    }
183

    
184
    nb_frames = 0;
185

    
186
    if(video_enc){
187
        put_le32(pb, (uint32_t)(INT64_C(1000000) * video_enc->time_base.num / video_enc->time_base.den));
188
    } else {
189
        put_le32(pb, 0);
190
    }
191
    put_le32(pb, bitrate / 8); /* XXX: not quite exact */
192
    put_le32(pb, 0); /* padding */
193
    if (url_is_streamed(pb))
194
        put_le32(pb, AVIF_TRUSTCKTYPE | AVIF_ISINTERLEAVED); /* flags */
195
    else
196
        put_le32(pb, AVIF_TRUSTCKTYPE | AVIF_HASINDEX | AVIF_ISINTERLEAVED); /* flags */
197
    avi->frames_hdr_all = url_ftell(pb); /* remember this offset to fill later */
198
    put_le32(pb, nb_frames); /* nb frames, filled later */
199
    put_le32(pb, 0); /* initial frame */
200
    put_le32(pb, s->nb_streams); /* nb streams */
201
    put_le32(pb, 1024 * 1024); /* suggested buffer size */
202
    if(video_enc){
203
        put_le32(pb, video_enc->width);
204
        put_le32(pb, video_enc->height);
205
    } else {
206
        put_le32(pb, 0);
207
        put_le32(pb, 0);
208
    }
209
    put_le32(pb, 0); /* reserved */
210
    put_le32(pb, 0); /* reserved */
211
    put_le32(pb, 0); /* reserved */
212
    put_le32(pb, 0); /* reserved */
213

    
214
    /* stream list */
215
    for(i=0;i<n;i++) {
216
        AVIStream *avist= s->streams[i]->priv_data;
217
        list2 = ff_start_tag(pb, "LIST");
218
        put_tag(pb, "strl");
219

    
220
        stream = s->streams[i]->codec;
221

    
222
        /* stream generic header */
223
        strh = ff_start_tag(pb, "strh");
224
        switch(stream->codec_type) {
225
        case CODEC_TYPE_SUBTITLE:
226
            // XSUB subtitles behave like video tracks, other subtitles
227
            // are not (yet) supported.
228
            if (stream->codec_id != CODEC_ID_XSUB) break;
229
        case CODEC_TYPE_VIDEO: put_tag(pb, "vids"); break;
230
        case CODEC_TYPE_AUDIO: put_tag(pb, "auds"); break;
231
//        case CODEC_TYPE_TEXT : put_tag(pb, "txts"); break;
232
        case CODEC_TYPE_DATA : put_tag(pb, "dats"); break;
233
        }
234
        if(stream->codec_type == CODEC_TYPE_VIDEO ||
235
           stream->codec_id == CODEC_ID_XSUB)
236
            put_le32(pb, stream->codec_tag);
237
        else
238
            put_le32(pb, 1);
239
        put_le32(pb, 0); /* flags */
240
        put_le16(pb, 0); /* priority */
241
        put_le16(pb, 0); /* language */
242
        put_le32(pb, 0); /* initial frame */
243

    
244
        ff_parse_specific_params(stream, &au_byterate, &au_ssize, &au_scale);
245

    
246
        put_le32(pb, au_scale); /* scale */
247
        put_le32(pb, au_byterate); /* rate */
248
        av_set_pts_info(s->streams[i], 64, au_scale, au_byterate);
249

    
250
        put_le32(pb, 0); /* start */
251
        avist->frames_hdr_strm = url_ftell(pb); /* remember this offset to fill later */
252
        if (url_is_streamed(pb))
253
            put_le32(pb, AVI_MAX_RIFF_SIZE); /* FIXME: this may be broken, but who cares */
254
        else
255
            put_le32(pb, 0); /* length, XXX: filled later */
256

    
257
        /* suggested buffer size */ //FIXME set at the end to largest chunk
258
        if(stream->codec_type == CODEC_TYPE_VIDEO)
259
            put_le32(pb, 1024 * 1024);
260
        else if(stream->codec_type == CODEC_TYPE_AUDIO)
261
            put_le32(pb, 12 * 1024);
262
        else
263
            put_le32(pb, 0);
264
        put_le32(pb, -1); /* quality */
265
        put_le32(pb, au_ssize); /* sample size */
266
        put_le32(pb, 0);
267
        put_le16(pb, stream->width);
268
        put_le16(pb, stream->height);
269
        ff_end_tag(pb, strh);
270

    
271
      if(stream->codec_type != CODEC_TYPE_DATA){
272
        strf = ff_start_tag(pb, "strf");
273
        switch(stream->codec_type) {
274
        case CODEC_TYPE_SUBTITLE:
275
            // XSUB subtitles behave like video tracks, other subtitles
276
            // are not (yet) supported.
277
            if (stream->codec_id != CODEC_ID_XSUB) break;
278
        case CODEC_TYPE_VIDEO:
279
            ff_put_bmp_header(pb, stream, ff_codec_bmp_tags, 0);
280
            break;
281
        case CODEC_TYPE_AUDIO:
282
            if (ff_put_wav_header(pb, stream) < 0) {
283
                return -1;
284
            }
285
            break;
286
        default:
287
            return -1;
288
        }
289
        ff_end_tag(pb, strf);
290
        if ((t = av_metadata_get(s->streams[i]->metadata, "strn", NULL, 0))) {
291
            avi_write_info_tag(s->pb, t->key, t->value);
292
            t = NULL;
293
        }
294
        //FIXME a limitation of metadata conversion system
295
        else if ((t = av_metadata_get(s->streams[i]->metadata, "INAM", NULL, 0))) {
296
            avi_write_info_tag(s->pb, "strn", t->value);
297
            t = NULL;
298
        }
299
      }
300

    
301
        if (!url_is_streamed(pb)) {
302
            unsigned char tag[5];
303
            int j;
304

    
305
            /* Starting to lay out AVI OpenDML master index.
306
             * We want to make it JUNK entry for now, since we'd
307
             * like to get away without making AVI an OpenDML one
308
             * for compatibility reasons.
309
             */
310
            avist->indexes.entry = avist->indexes.ents_allocated = 0;
311
            avist->indexes.indx_start = ff_start_tag(pb, "JUNK");
312
            put_le16(pb, 4);        /* wLongsPerEntry */
313
            put_byte(pb, 0);        /* bIndexSubType (0 == frame index) */
314
            put_byte(pb, 0);        /* bIndexType (0 == AVI_INDEX_OF_INDEXES) */
315
            put_le32(pb, 0);        /* nEntriesInUse (will fill out later on) */
316
            put_tag(pb, avi_stream2fourcc(&tag[0], i, stream->codec_type));
317
                                    /* dwChunkId */
318
            put_le64(pb, 0);        /* dwReserved[3]
319
            put_le32(pb, 0);           Must be 0.    */
320
            for (j=0; j < AVI_MASTER_INDEX_SIZE * 2; j++)
321
                 put_le64(pb, 0);
322
            ff_end_tag(pb, avist->indexes.indx_start);
323
        }
324

    
325
        if(   stream->codec_type == CODEC_TYPE_VIDEO
326
           && s->streams[i]->sample_aspect_ratio.num>0
327
           && s->streams[i]->sample_aspect_ratio.den>0){
328
            int vprp= ff_start_tag(pb, "vprp");
329
            AVRational dar = av_mul_q(s->streams[i]->sample_aspect_ratio,
330
                                      (AVRational){stream->width, stream->height});
331
            int num, den;
332
            av_reduce(&num, &den, dar.num, dar.den, 0xFFFF);
333

    
334
            put_le32(pb, 0); //video format  = unknown
335
            put_le32(pb, 0); //video standard= unknown
336
            put_le32(pb, lrintf(1.0/av_q2d(stream->time_base)));
337
            put_le32(pb, stream->width );
338
            put_le32(pb, stream->height);
339
            put_le16(pb, den);
340
            put_le16(pb, num);
341
            put_le32(pb, stream->width );
342
            put_le32(pb, stream->height);
343
            put_le32(pb, 1); //progressive FIXME
344

    
345
            put_le32(pb, stream->height);
346
            put_le32(pb, stream->width );
347
            put_le32(pb, stream->height);
348
            put_le32(pb, stream->width );
349
            put_le32(pb, 0);
350
            put_le32(pb, 0);
351

    
352
            put_le32(pb, 0);
353
            put_le32(pb, 0);
354
            ff_end_tag(pb, vprp);
355
        }
356

    
357
        ff_end_tag(pb, list2);
358
    }
359

    
360
    if (!url_is_streamed(pb)) {
361
        /* AVI could become an OpenDML one, if it grows beyond 2Gb range */
362
        avi->odml_list = ff_start_tag(pb, "JUNK");
363
        put_tag(pb, "odml");
364
        put_tag(pb, "dmlh");
365
        put_le32(pb, 248);
366
        for (i = 0; i < 248; i+= 4)
367
             put_le32(pb, 0);
368
        ff_end_tag(pb, avi->odml_list);
369
    }
370

    
371
    ff_end_tag(pb, list1);
372

    
373
    list2 = ff_start_tag(pb, "LIST");
374
    put_tag(pb, "INFO");
375
    for (i = 0; *ff_avi_tags[i]; i++) {
376
        if ((t = av_metadata_get(s->metadata, ff_avi_tags[i], NULL, AV_METADATA_MATCH_CASE)))
377
            avi_write_info_tag(s->pb, t->key, t->value);
378
    }
379
    if(!(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT))
380
        avi_write_info_tag(pb, "ISFT", LIBAVFORMAT_IDENT);
381
    ff_end_tag(pb, list2);
382

    
383
    /* some padding for easier tag editing */
384
    list2 = ff_start_tag(pb, "JUNK");
385
    for (i = 0; i < 1016; i += 4)
386
        put_le32(pb, 0);
387
    ff_end_tag(pb, list2);
388

    
389
    avi->movi_list = ff_start_tag(pb, "LIST");
390
    put_tag(pb, "movi");
391

    
392
    put_flush_packet(pb);
393

    
394
    return 0;
395
}
396

    
397
static int avi_write_ix(AVFormatContext *s)
398
{
399
    ByteIOContext *pb = s->pb;
400
    AVIContext *avi = s->priv_data;
401
    char tag[5];
402
    char ix_tag[] = "ix00";
403
    int i, j;
404

    
405
    assert(!url_is_streamed(pb));
406

    
407
    if (avi->riff_id > AVI_MASTER_INDEX_SIZE)
408
        return -1;
409

    
410
    for (i=0;i<s->nb_streams;i++) {
411
        AVIStream *avist= s->streams[i]->priv_data;
412
         int64_t ix, pos;
413

    
414
         avi_stream2fourcc(&tag[0], i, s->streams[i]->codec->codec_type);
415
         ix_tag[3] = '0' + i;
416

    
417
         /* Writing AVI OpenDML leaf index chunk */
418
         ix = url_ftell(pb);
419
         put_tag(pb, &ix_tag[0]);     /* ix?? */
420
         put_le32(pb, avist->indexes.entry * 8 + 24);
421
                                      /* chunk size */
422
         put_le16(pb, 2);             /* wLongsPerEntry */
423
         put_byte(pb, 0);             /* bIndexSubType (0 == frame index) */
424
         put_byte(pb, 1);             /* bIndexType (1 == AVI_INDEX_OF_CHUNKS) */
425
         put_le32(pb, avist->indexes.entry);
426
                                      /* nEntriesInUse */
427
         put_tag(pb, &tag[0]);        /* dwChunkId */
428
         put_le64(pb, avi->movi_list);/* qwBaseOffset */
429
         put_le32(pb, 0);             /* dwReserved_3 (must be 0) */
430

    
431
         for (j=0; j<avist->indexes.entry; j++) {
432
             AVIIentry* ie = avi_get_ientry(&avist->indexes, j);
433
             put_le32(pb, ie->pos + 8);
434
             put_le32(pb, ((uint32_t)ie->len & ~0x80000000) |
435
                          (ie->flags & 0x10 ? 0 : 0x80000000));
436
         }
437
         put_flush_packet(pb);
438
         pos = url_ftell(pb);
439

    
440
         /* Updating one entry in the AVI OpenDML master index */
441
         url_fseek(pb, avist->indexes.indx_start - 8, SEEK_SET);
442
         put_tag(pb, "indx");                 /* enabling this entry */
443
         url_fskip(pb, 8);
444
         put_le32(pb, avi->riff_id);          /* nEntriesInUse */
445
         url_fskip(pb, 16*avi->riff_id);
446
         put_le64(pb, ix);                    /* qwOffset */
447
         put_le32(pb, pos - ix);              /* dwSize */
448
         put_le32(pb, avist->indexes.entry); /* dwDuration */
449

    
450
         url_fseek(pb, pos, SEEK_SET);
451
    }
452
    return 0;
453
}
454

    
455
static int avi_write_idx1(AVFormatContext *s)
456
{
457
    ByteIOContext *pb = s->pb;
458
    AVIContext *avi = s->priv_data;
459
    int64_t idx_chunk;
460
    int i;
461
    char tag[5];
462

    
463
    if (!url_is_streamed(pb)) {
464
        AVIStream *avist;
465
        AVIIentry* ie = 0, *tie;
466
        int empty, stream_id = -1;
467

    
468
        idx_chunk = ff_start_tag(pb, "idx1");
469
        for(i=0; i<s->nb_streams; i++){
470
            avist= s->streams[i]->priv_data;
471
            avist->entry=0;
472
        }
473

    
474
        do {
475
            empty = 1;
476
            for (i=0; i<s->nb_streams; i++) {
477
                avist= s->streams[i]->priv_data;
478
                 if (avist->indexes.entry <= avist->entry)
479
                     continue;
480

    
481
                 tie = avi_get_ientry(&avist->indexes, avist->entry);
482
                 if (empty || tie->pos < ie->pos) {
483
                     ie = tie;
484
                     stream_id = i;
485
                 }
486
                 empty = 0;
487
            }
488
            if (!empty) {
489
                avist= s->streams[stream_id]->priv_data;
490
                avi_stream2fourcc(&tag[0], stream_id,
491
                                  s->streams[stream_id]->codec->codec_type);
492
                put_tag(pb, &tag[0]);
493
                put_le32(pb, ie->flags);
494
                put_le32(pb, ie->pos);
495
                put_le32(pb, ie->len);
496
                avist->entry++;
497
            }
498
        } while (!empty);
499
        ff_end_tag(pb, idx_chunk);
500

    
501
        avi_write_counters(s, avi->riff_id);
502
    }
503
    return 0;
504
}
505

    
506
static int avi_write_packet(AVFormatContext *s, AVPacket *pkt)
507
{
508
    AVIContext *avi = s->priv_data;
509
    ByteIOContext *pb = s->pb;
510
    unsigned char tag[5];
511
    unsigned int flags=0;
512
    const int stream_index= pkt->stream_index;
513
    AVIStream *avist= s->streams[stream_index]->priv_data;
514
    AVCodecContext *enc= s->streams[stream_index]->codec;
515
    int size= pkt->size;
516

    
517
//    av_log(s, AV_LOG_DEBUG, "%"PRId64" %d %d\n", pkt->dts, avi->packet_count[stream_index], stream_index);
518
    while(enc->block_align==0 && pkt->dts != AV_NOPTS_VALUE && pkt->dts > avist->packet_count){
519
        AVPacket empty_packet;
520

    
521
        av_init_packet(&empty_packet);
522
        empty_packet.size= 0;
523
        empty_packet.data= NULL;
524
        empty_packet.stream_index= stream_index;
525
        avi_write_packet(s, &empty_packet);
526
//        av_log(s, AV_LOG_DEBUG, "dup %"PRId64" %d\n", pkt->dts, avi->packet_count[stream_index]);
527
    }
528
    avist->packet_count++;
529

    
530
    // Make sure to put an OpenDML chunk when the file size exceeds the limits
531
    if (!url_is_streamed(pb) &&
532
        (url_ftell(pb) - avi->riff_start > AVI_MAX_RIFF_SIZE)) {
533

    
534
        avi_write_ix(s);
535
        ff_end_tag(pb, avi->movi_list);
536

    
537
        if (avi->riff_id == 1)
538
            avi_write_idx1(s);
539

    
540
        ff_end_tag(pb, avi->riff_start);
541
        avi->movi_list = avi_start_new_riff(s, pb, "AVIX", "movi");
542
    }
543

    
544
    avi_stream2fourcc(&tag[0], stream_index, enc->codec_type);
545
    if(pkt->flags&PKT_FLAG_KEY)
546
        flags = 0x10;
547
    if (enc->codec_type == CODEC_TYPE_AUDIO) {
548
       avist->audio_strm_length += size;
549
    }
550

    
551
    if (!url_is_streamed(s->pb)) {
552
        AVIIndex* idx = &avist->indexes;
553
        int cl = idx->entry / AVI_INDEX_CLUSTER_SIZE;
554
        int id = idx->entry % AVI_INDEX_CLUSTER_SIZE;
555
        if (idx->ents_allocated <= idx->entry) {
556
            idx->cluster = av_realloc(idx->cluster, (cl+1)*sizeof(void*));
557
            if (!idx->cluster)
558
                return -1;
559
            idx->cluster[cl] = av_malloc(AVI_INDEX_CLUSTER_SIZE*sizeof(AVIIentry));
560
            if (!idx->cluster[cl])
561
                return -1;
562
            idx->ents_allocated += AVI_INDEX_CLUSTER_SIZE;
563
        }
564

    
565
        idx->cluster[cl][id].flags = flags;
566
        idx->cluster[cl][id].pos = url_ftell(pb) - avi->movi_list;
567
        idx->cluster[cl][id].len = size;
568
        idx->entry++;
569
    }
570

    
571
    put_buffer(pb, tag, 4);
572
    put_le32(pb, size);
573
    put_buffer(pb, pkt->data, size);
574
    if (size & 1)
575
        put_byte(pb, 0);
576

    
577
    put_flush_packet(pb);
578
    return 0;
579
}
580

    
581
static int avi_write_trailer(AVFormatContext *s)
582
{
583
    AVIContext *avi = s->priv_data;
584
    ByteIOContext *pb = s->pb;
585
    int res = 0;
586
    int i, j, n, nb_frames;
587
    int64_t file_size;
588

    
589
    if (!url_is_streamed(pb)){
590
        if (avi->riff_id == 1) {
591
            ff_end_tag(pb, avi->movi_list);
592
            res = avi_write_idx1(s);
593
            ff_end_tag(pb, avi->riff_start);
594
        } else {
595
            avi_write_ix(s);
596
            ff_end_tag(pb, avi->movi_list);
597
            ff_end_tag(pb, avi->riff_start);
598

    
599
            file_size = url_ftell(pb);
600
            url_fseek(pb, avi->odml_list - 8, SEEK_SET);
601
            put_tag(pb, "LIST"); /* Making this AVI OpenDML one */
602
            url_fskip(pb, 16);
603

    
604
            for (n=nb_frames=0;n<s->nb_streams;n++) {
605
                AVCodecContext *stream = s->streams[n]->codec;
606
                AVIStream *avist= s->streams[n]->priv_data;
607

    
608
                if (stream->codec_type == CODEC_TYPE_VIDEO) {
609
                    if (nb_frames < avist->packet_count)
610
                        nb_frames = avist->packet_count;
611
                } else {
612
                    if (stream->codec_id == CODEC_ID_MP2 || stream->codec_id == CODEC_ID_MP3) {
613
                        nb_frames += avist->packet_count;
614
                    }
615
                }
616
            }
617
            put_le32(pb, nb_frames);
618
            url_fseek(pb, file_size, SEEK_SET);
619

    
620
            avi_write_counters(s, avi->riff_id);
621
        }
622
    }
623
    put_flush_packet(pb);
624

    
625
    for (i=0; i<s->nb_streams; i++) {
626
         AVIStream *avist= s->streams[i]->priv_data;
627
         for (j=0; j<avist->indexes.ents_allocated/AVI_INDEX_CLUSTER_SIZE; j++)
628
              av_free(avist->indexes.cluster[j]);
629
         av_freep(&avist->indexes.cluster);
630
         avist->indexes.ents_allocated = avist->indexes.entry = 0;
631
    }
632

    
633
    return res;
634
}
635

    
636
AVOutputFormat avi_muxer = {
637
    "avi",
638
    NULL_IF_CONFIG_SMALL("AVI format"),
639
    "video/x-msvideo",
640
    "avi",
641
    sizeof(AVIContext),
642
    CODEC_ID_MP2,
643
    CODEC_ID_MPEG4,
644
    avi_write_header,
645
    avi_write_packet,
646
    avi_write_trailer,
647
    .codec_tag= (const AVCodecTag* const []){ff_codec_bmp_tags, ff_codec_wav_tags, 0},
648
    .flags= AVFMT_VARIABLE_FPS,
649
    .metadata_conv = ff_avi_metadata_conv,
650
};