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ffmpeg / libavformat / avienc.c @ e356fc57

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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 "avio_internal.h"
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#include "riff.h"
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#include "libavutil/intreadwrite.h"
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27
/*
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 * TODO:
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 *  - fill all fields if non streamed (nb_frames for example)
30
 */
31

    
32
typedef struct AVIIentry {
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    unsigned int flags, pos, len;
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} AVIIentry;
35

    
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#define AVI_INDEX_CLUSTER_SIZE 16384
37

    
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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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45
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;
50

    
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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 ;
59

    
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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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}
66

    
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static int64_t avi_start_new_riff(AVFormatContext *s, AVIOContext *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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    ffio_wfourcc(pb, riff_tag);
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    loff = ff_start_tag(pb, "LIST");
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    ffio_wfourcc(pb, list_tag);
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    return loff;
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}
86

    
87
static char* avi_stream2fourcc(char* tag, int index, enum AVMediaType type)
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{
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    tag[0] = '0' + index/10;
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    tag[1] = '0' + index%10;
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    if (type == AVMEDIA_TYPE_VIDEO) {
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        tag[2] = 'd';
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        tag[3] = 'c';
94
    } else if (type == AVMEDIA_TYPE_SUBTITLE) {
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        // note: this is not an official code
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        tag[2] = 's';
97
        tag[3] = 'b';
98
    } else {
99
        tag[2] = 'w';
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        tag[3] = 'b';
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    }
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    tag[4] = '\0';
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    return tag;
104
}
105

    
106
static void avi_write_info_tag(AVIOContext *pb, const char *tag, const char *str)
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{
108
    int len = strlen(str);
109
    if (len > 0) {
110
        len++;
111
        ffio_wfourcc(pb, tag);
112
        avio_wl32(pb, len);
113
        avio_put_str(pb, str);
114
        if (len & 1)
115
            avio_w8(pb, 0);
116
    }
117
}
118

    
119
static int avi_write_counters(AVFormatContext* s, int riff_id)
120
{
121
    AVIOContext *pb = s->pb;
122
    AVIContext *avi = s->priv_data;
123
    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;
126

    
127
    file_size = url_ftell(pb);
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    for(n = 0; n < s->nb_streams; n++) {
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        AVIStream *avist= s->streams[n]->priv_data;
130

    
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        assert(avist->frames_hdr_strm);
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        stream = s->streams[n]->codec;
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        avio_seek(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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            avio_wl32(pb, avist->packet_count);
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        } else {
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            avio_wl32(pb, avist->audio_strm_length / au_ssize);
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        }
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        if(stream->codec_type == AVMEDIA_TYPE_VIDEO)
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            nb_frames = FFMAX(nb_frames, avist->packet_count);
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    }
143
    if(riff_id == 1) {
144
        assert(avi->frames_hdr_all);
145
        avio_seek(pb, avi->frames_hdr_all, SEEK_SET);
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        avio_wl32(pb, nb_frames);
147
    }
148
    avio_seek(pb, file_size, SEEK_SET);
149

    
150
    return 0;
151
}
152

    
153
static int avi_write_header(AVFormatContext *s)
154
{
155
    AVIContext *avi = s->priv_data;
156
    AVIOContext *pb = s->pb;
157
    int bitrate, n, i, nb_frames, au_byterate, au_ssize, au_scale;
158
    AVCodecContext *stream, *video_enc;
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    int64_t list1, list2, strh, strf;
160
    AVMetadataTag *t = NULL;
161

    
162
    if (s->nb_streams > AVI_MAX_STREAM_COUNT) {
163
        av_log(s, AV_LOG_ERROR, "AVI does not support >%d streams\n",
164
               AVI_MAX_STREAM_COUNT);
165
        return -1;
166
    }
167

    
168
    for(n=0;n<s->nb_streams;n++) {
169
        s->streams[n]->priv_data= av_mallocz(sizeof(AVIStream));
170
        if(!s->streams[n]->priv_data)
171
            return AVERROR(ENOMEM);
172
    }
173

    
174
    /* header list */
175
    avi->riff_id = 0;
176
    list1 = avi_start_new_riff(s, pb, "AVI ", "hdrl");
177

    
178
    /* avi header */
179
    ffio_wfourcc(pb, "avih");
180
    avio_wl32(pb, 14 * 4);
181
    bitrate = 0;
182

    
183
    video_enc = NULL;
184
    for(n=0;n<s->nb_streams;n++) {
185
        stream = s->streams[n]->codec;
186
        bitrate += stream->bit_rate;
187
        if (stream->codec_type == AVMEDIA_TYPE_VIDEO)
188
            video_enc = stream;
189
    }
190

    
191
    nb_frames = 0;
192

    
193
    if(video_enc){
194
        avio_wl32(pb, (uint32_t)(INT64_C(1000000) * video_enc->time_base.num / video_enc->time_base.den));
195
    } else {
196
        avio_wl32(pb, 0);
197
    }
198
    avio_wl32(pb, bitrate / 8); /* XXX: not quite exact */
199
    avio_wl32(pb, 0); /* padding */
200
    if (url_is_streamed(pb))
201
        avio_wl32(pb, AVIF_TRUSTCKTYPE | AVIF_ISINTERLEAVED); /* flags */
202
    else
203
        avio_wl32(pb, AVIF_TRUSTCKTYPE | AVIF_HASINDEX | AVIF_ISINTERLEAVED); /* flags */
204
    avi->frames_hdr_all = url_ftell(pb); /* remember this offset to fill later */
205
    avio_wl32(pb, nb_frames); /* nb frames, filled later */
206
    avio_wl32(pb, 0); /* initial frame */
207
    avio_wl32(pb, s->nb_streams); /* nb streams */
208
    avio_wl32(pb, 1024 * 1024); /* suggested buffer size */
209
    if(video_enc){
210
        avio_wl32(pb, video_enc->width);
211
        avio_wl32(pb, video_enc->height);
212
    } else {
213
        avio_wl32(pb, 0);
214
        avio_wl32(pb, 0);
215
    }
216
    avio_wl32(pb, 0); /* reserved */
217
    avio_wl32(pb, 0); /* reserved */
218
    avio_wl32(pb, 0); /* reserved */
219
    avio_wl32(pb, 0); /* reserved */
220

    
221
    /* stream list */
222
    for(i=0;i<n;i++) {
223
        AVIStream *avist= s->streams[i]->priv_data;
224
        list2 = ff_start_tag(pb, "LIST");
225
        ffio_wfourcc(pb, "strl");
226

    
227
        stream = s->streams[i]->codec;
228

    
229
        /* stream generic header */
230
        strh = ff_start_tag(pb, "strh");
231
        switch(stream->codec_type) {
232
        case AVMEDIA_TYPE_SUBTITLE:
233
            // XSUB subtitles behave like video tracks, other subtitles
234
            // are not (yet) supported.
235
            if (stream->codec_id != CODEC_ID_XSUB) {
236
                av_log(s, AV_LOG_ERROR, "Subtitle streams other than DivX XSUB are not supported by the AVI muxer.\n");
237
                return AVERROR_PATCHWELCOME;
238
            }
239
        case AVMEDIA_TYPE_VIDEO: ffio_wfourcc(pb, "vids"); break;
240
        case AVMEDIA_TYPE_AUDIO: ffio_wfourcc(pb, "auds"); break;
241
//      case AVMEDIA_TYPE_TEXT : ffio_wfourcc(pb, "txts"); break;
242
        case AVMEDIA_TYPE_DATA : ffio_wfourcc(pb, "dats"); break;
243
        }
244
        if(stream->codec_type == AVMEDIA_TYPE_VIDEO ||
245
           stream->codec_id == CODEC_ID_XSUB)
246
            avio_wl32(pb, stream->codec_tag);
247
        else
248
            avio_wl32(pb, 1);
249
        avio_wl32(pb, 0); /* flags */
250
        avio_wl16(pb, 0); /* priority */
251
        avio_wl16(pb, 0); /* language */
252
        avio_wl32(pb, 0); /* initial frame */
253

    
254
        ff_parse_specific_params(stream, &au_byterate, &au_ssize, &au_scale);
255

    
256
        avio_wl32(pb, au_scale); /* scale */
257
        avio_wl32(pb, au_byterate); /* rate */
258
        av_set_pts_info(s->streams[i], 64, au_scale, au_byterate);
259

    
260
        avio_wl32(pb, 0); /* start */
261
        avist->frames_hdr_strm = url_ftell(pb); /* remember this offset to fill later */
262
        if (url_is_streamed(pb))
263
            avio_wl32(pb, AVI_MAX_RIFF_SIZE); /* FIXME: this may be broken, but who cares */
264
        else
265
            avio_wl32(pb, 0); /* length, XXX: filled later */
266

    
267
        /* suggested buffer size */ //FIXME set at the end to largest chunk
268
        if(stream->codec_type == AVMEDIA_TYPE_VIDEO)
269
            avio_wl32(pb, 1024 * 1024);
270
        else if(stream->codec_type == AVMEDIA_TYPE_AUDIO)
271
            avio_wl32(pb, 12 * 1024);
272
        else
273
            avio_wl32(pb, 0);
274
        avio_wl32(pb, -1); /* quality */
275
        avio_wl32(pb, au_ssize); /* sample size */
276
        avio_wl32(pb, 0);
277
        avio_wl16(pb, stream->width);
278
        avio_wl16(pb, stream->height);
279
        ff_end_tag(pb, strh);
280

    
281
      if(stream->codec_type != AVMEDIA_TYPE_DATA){
282
        strf = ff_start_tag(pb, "strf");
283
        switch(stream->codec_type) {
284
        case AVMEDIA_TYPE_SUBTITLE:
285
            // XSUB subtitles behave like video tracks, other subtitles
286
            // are not (yet) supported.
287
            if (stream->codec_id != CODEC_ID_XSUB) break;
288
        case AVMEDIA_TYPE_VIDEO:
289
            ff_put_bmp_header(pb, stream, ff_codec_bmp_tags, 0);
290
            break;
291
        case AVMEDIA_TYPE_AUDIO:
292
            if (ff_put_wav_header(pb, stream) < 0) {
293
                return -1;
294
            }
295
            break;
296
        default:
297
            return -1;
298
        }
299
        ff_end_tag(pb, strf);
300
        if ((t = av_metadata_get(s->streams[i]->metadata, "title", NULL, 0))) {
301
            avi_write_info_tag(s->pb, "strn", t->value);
302
            t = NULL;
303
        }
304
      }
305

    
306
        if (!url_is_streamed(pb)) {
307
            unsigned char tag[5];
308
            int j;
309

    
310
            /* Starting to lay out AVI OpenDML master index.
311
             * We want to make it JUNK entry for now, since we'd
312
             * like to get away without making AVI an OpenDML one
313
             * for compatibility reasons.
314
             */
315
            avist->indexes.entry = avist->indexes.ents_allocated = 0;
316
            avist->indexes.indx_start = ff_start_tag(pb, "JUNK");
317
            avio_wl16(pb, 4);        /* wLongsPerEntry */
318
            avio_w8(pb, 0);          /* bIndexSubType (0 == frame index) */
319
            avio_w8(pb, 0);          /* bIndexType (0 == AVI_INDEX_OF_INDEXES) */
320
            avio_wl32(pb, 0);        /* nEntriesInUse (will fill out later on) */
321
            ffio_wfourcc(pb, avi_stream2fourcc(tag, i, stream->codec_type));
322
                                    /* dwChunkId */
323
            avio_wl64(pb, 0);        /* dwReserved[3]
324
            avio_wl32(pb, 0);           Must be 0.    */
325
            for (j=0; j < AVI_MASTER_INDEX_SIZE * 2; j++)
326
                 avio_wl64(pb, 0);
327
            ff_end_tag(pb, avist->indexes.indx_start);
328
        }
329

    
330
        if(   stream->codec_type == AVMEDIA_TYPE_VIDEO
331
           && s->streams[i]->sample_aspect_ratio.num>0
332
           && s->streams[i]->sample_aspect_ratio.den>0){
333
            int vprp= ff_start_tag(pb, "vprp");
334
            AVRational dar = av_mul_q(s->streams[i]->sample_aspect_ratio,
335
                                      (AVRational){stream->width, stream->height});
336
            int num, den;
337
            av_reduce(&num, &den, dar.num, dar.den, 0xFFFF);
338

    
339
            avio_wl32(pb, 0); //video format  = unknown
340
            avio_wl32(pb, 0); //video standard= unknown
341
            avio_wl32(pb, lrintf(1.0/av_q2d(stream->time_base)));
342
            avio_wl32(pb, stream->width );
343
            avio_wl32(pb, stream->height);
344
            avio_wl16(pb, den);
345
            avio_wl16(pb, num);
346
            avio_wl32(pb, stream->width );
347
            avio_wl32(pb, stream->height);
348
            avio_wl32(pb, 1); //progressive FIXME
349

    
350
            avio_wl32(pb, stream->height);
351
            avio_wl32(pb, stream->width );
352
            avio_wl32(pb, stream->height);
353
            avio_wl32(pb, stream->width );
354
            avio_wl32(pb, 0);
355
            avio_wl32(pb, 0);
356

    
357
            avio_wl32(pb, 0);
358
            avio_wl32(pb, 0);
359
            ff_end_tag(pb, vprp);
360
        }
361

    
362
        ff_end_tag(pb, list2);
363
    }
364

    
365
    if (!url_is_streamed(pb)) {
366
        /* AVI could become an OpenDML one, if it grows beyond 2Gb range */
367
        avi->odml_list = ff_start_tag(pb, "JUNK");
368
        ffio_wfourcc(pb, "odml");
369
        ffio_wfourcc(pb, "dmlh");
370
        avio_wl32(pb, 248);
371
        for (i = 0; i < 248; i+= 4)
372
             avio_wl32(pb, 0);
373
        ff_end_tag(pb, avi->odml_list);
374
    }
375

    
376
    ff_end_tag(pb, list1);
377

    
378
    list2 = ff_start_tag(pb, "LIST");
379
    ffio_wfourcc(pb, "INFO");
380
    ff_metadata_conv(&s->metadata, ff_avi_metadata_conv, NULL);
381
    for (i = 0; *ff_avi_tags[i]; i++) {
382
        if ((t = av_metadata_get(s->metadata, ff_avi_tags[i], NULL, AV_METADATA_MATCH_CASE)))
383
            avi_write_info_tag(s->pb, t->key, t->value);
384
    }
385
    ff_end_tag(pb, list2);
386

    
387
    /* some padding for easier tag editing */
388
    list2 = ff_start_tag(pb, "JUNK");
389
    for (i = 0; i < 1016; i += 4)
390
        avio_wl32(pb, 0);
391
    ff_end_tag(pb, list2);
392

    
393
    avi->movi_list = ff_start_tag(pb, "LIST");
394
    ffio_wfourcc(pb, "movi");
395

    
396
    put_flush_packet(pb);
397

    
398
    return 0;
399
}
400

    
401
static int avi_write_ix(AVFormatContext *s)
402
{
403
    AVIOContext *pb = s->pb;
404
    AVIContext *avi = s->priv_data;
405
    char tag[5];
406
    char ix_tag[] = "ix00";
407
    int i, j;
408

    
409
    assert(!url_is_streamed(pb));
410

    
411
    if (avi->riff_id > AVI_MASTER_INDEX_SIZE)
412
        return -1;
413

    
414
    for (i=0;i<s->nb_streams;i++) {
415
        AVIStream *avist= s->streams[i]->priv_data;
416
         int64_t ix, pos;
417

    
418
         avi_stream2fourcc(tag, i, s->streams[i]->codec->codec_type);
419
         ix_tag[3] = '0' + i;
420

    
421
         /* Writing AVI OpenDML leaf index chunk */
422
         ix = url_ftell(pb);
423
         ffio_wfourcc(pb, ix_tag);     /* ix?? */
424
         avio_wl32(pb, avist->indexes.entry * 8 + 24);
425
                                      /* chunk size */
426
         avio_wl16(pb, 2);             /* wLongsPerEntry */
427
         avio_w8(pb, 0);             /* bIndexSubType (0 == frame index) */
428
         avio_w8(pb, 1);             /* bIndexType (1 == AVI_INDEX_OF_CHUNKS) */
429
         avio_wl32(pb, avist->indexes.entry);
430
                                      /* nEntriesInUse */
431
         ffio_wfourcc(pb, tag);        /* dwChunkId */
432
         avio_wl64(pb, avi->movi_list);/* qwBaseOffset */
433
         avio_wl32(pb, 0);             /* dwReserved_3 (must be 0) */
434

    
435
         for (j=0; j<avist->indexes.entry; j++) {
436
             AVIIentry* ie = avi_get_ientry(&avist->indexes, j);
437
             avio_wl32(pb, ie->pos + 8);
438
             avio_wl32(pb, ((uint32_t)ie->len & ~0x80000000) |
439
                          (ie->flags & 0x10 ? 0 : 0x80000000));
440
         }
441
         put_flush_packet(pb);
442
         pos = url_ftell(pb);
443

    
444
         /* Updating one entry in the AVI OpenDML master index */
445
         avio_seek(pb, avist->indexes.indx_start - 8, SEEK_SET);
446
         ffio_wfourcc(pb, "indx");            /* enabling this entry */
447
         avio_seek(pb, 8, SEEK_CUR);
448
         avio_wl32(pb, avi->riff_id);         /* nEntriesInUse */
449
         avio_seek(pb, 16*avi->riff_id, SEEK_CUR);
450
         avio_wl64(pb, ix);                   /* qwOffset */
451
         avio_wl32(pb, pos - ix);             /* dwSize */
452
         avio_wl32(pb, avist->indexes.entry); /* dwDuration */
453

    
454
         avio_seek(pb, pos, SEEK_SET);
455
    }
456
    return 0;
457
}
458

    
459
static int avi_write_idx1(AVFormatContext *s)
460
{
461
    AVIOContext *pb = s->pb;
462
    AVIContext *avi = s->priv_data;
463
    int64_t idx_chunk;
464
    int i;
465
    char tag[5];
466

    
467
    if (!url_is_streamed(pb)) {
468
        AVIStream *avist;
469
        AVIIentry* ie = 0, *tie;
470
        int empty, stream_id = -1;
471

    
472
        idx_chunk = ff_start_tag(pb, "idx1");
473
        for(i=0; i<s->nb_streams; i++){
474
            avist= s->streams[i]->priv_data;
475
            avist->entry=0;
476
        }
477

    
478
        do {
479
            empty = 1;
480
            for (i=0; i<s->nb_streams; i++) {
481
                avist= s->streams[i]->priv_data;
482
                 if (avist->indexes.entry <= avist->entry)
483
                     continue;
484

    
485
                 tie = avi_get_ientry(&avist->indexes, avist->entry);
486
                 if (empty || tie->pos < ie->pos) {
487
                     ie = tie;
488
                     stream_id = i;
489
                 }
490
                 empty = 0;
491
            }
492
            if (!empty) {
493
                avist= s->streams[stream_id]->priv_data;
494
                avi_stream2fourcc(tag, stream_id,
495
                                  s->streams[stream_id]->codec->codec_type);
496
                ffio_wfourcc(pb, tag);
497
                avio_wl32(pb, ie->flags);
498
                avio_wl32(pb, ie->pos);
499
                avio_wl32(pb, ie->len);
500
                avist->entry++;
501
            }
502
        } while (!empty);
503
        ff_end_tag(pb, idx_chunk);
504

    
505
        avi_write_counters(s, avi->riff_id);
506
    }
507
    return 0;
508
}
509

    
510
static int avi_write_packet(AVFormatContext *s, AVPacket *pkt)
511
{
512
    AVIContext *avi = s->priv_data;
513
    AVIOContext *pb = s->pb;
514
    unsigned char tag[5];
515
    unsigned int flags=0;
516
    const int stream_index= pkt->stream_index;
517
    AVIStream *avist= s->streams[stream_index]->priv_data;
518
    AVCodecContext *enc= s->streams[stream_index]->codec;
519
    int size= pkt->size;
520

    
521
//    av_log(s, AV_LOG_DEBUG, "%"PRId64" %d %d\n", pkt->dts, avi->packet_count[stream_index], stream_index);
522
    while(enc->block_align==0 && pkt->dts != AV_NOPTS_VALUE && pkt->dts > avist->packet_count){
523
        AVPacket empty_packet;
524

    
525
        av_init_packet(&empty_packet);
526
        empty_packet.size= 0;
527
        empty_packet.data= NULL;
528
        empty_packet.stream_index= stream_index;
529
        avi_write_packet(s, &empty_packet);
530
//        av_log(s, AV_LOG_DEBUG, "dup %"PRId64" %d\n", pkt->dts, avi->packet_count[stream_index]);
531
    }
532
    avist->packet_count++;
533

    
534
    // Make sure to put an OpenDML chunk when the file size exceeds the limits
535
    if (!url_is_streamed(pb) &&
536
        (url_ftell(pb) - avi->riff_start > AVI_MAX_RIFF_SIZE)) {
537

    
538
        avi_write_ix(s);
539
        ff_end_tag(pb, avi->movi_list);
540

    
541
        if (avi->riff_id == 1)
542
            avi_write_idx1(s);
543

    
544
        ff_end_tag(pb, avi->riff_start);
545
        avi->movi_list = avi_start_new_riff(s, pb, "AVIX", "movi");
546
    }
547

    
548
    avi_stream2fourcc(tag, stream_index, enc->codec_type);
549
    if(pkt->flags&AV_PKT_FLAG_KEY)
550
        flags = 0x10;
551
    if (enc->codec_type == AVMEDIA_TYPE_AUDIO) {
552
       avist->audio_strm_length += size;
553
    }
554

    
555
    if (!url_is_streamed(s->pb)) {
556
        AVIIndex* idx = &avist->indexes;
557
        int cl = idx->entry / AVI_INDEX_CLUSTER_SIZE;
558
        int id = idx->entry % AVI_INDEX_CLUSTER_SIZE;
559
        if (idx->ents_allocated <= idx->entry) {
560
            idx->cluster = av_realloc(idx->cluster, (cl+1)*sizeof(void*));
561
            if (!idx->cluster)
562
                return -1;
563
            idx->cluster[cl] = av_malloc(AVI_INDEX_CLUSTER_SIZE*sizeof(AVIIentry));
564
            if (!idx->cluster[cl])
565
                return -1;
566
            idx->ents_allocated += AVI_INDEX_CLUSTER_SIZE;
567
        }
568

    
569
        idx->cluster[cl][id].flags = flags;
570
        idx->cluster[cl][id].pos = url_ftell(pb) - avi->movi_list;
571
        idx->cluster[cl][id].len = size;
572
        idx->entry++;
573
    }
574

    
575
    avio_write(pb, tag, 4);
576
    avio_wl32(pb, size);
577
    avio_write(pb, pkt->data, size);
578
    if (size & 1)
579
        avio_w8(pb, 0);
580

    
581
    put_flush_packet(pb);
582
    return 0;
583
}
584

    
585
static int avi_write_trailer(AVFormatContext *s)
586
{
587
    AVIContext *avi = s->priv_data;
588
    AVIOContext *pb = s->pb;
589
    int res = 0;
590
    int i, j, n, nb_frames;
591
    int64_t file_size;
592

    
593
    if (!url_is_streamed(pb)){
594
        if (avi->riff_id == 1) {
595
            ff_end_tag(pb, avi->movi_list);
596
            res = avi_write_idx1(s);
597
            ff_end_tag(pb, avi->riff_start);
598
        } else {
599
            avi_write_ix(s);
600
            ff_end_tag(pb, avi->movi_list);
601
            ff_end_tag(pb, avi->riff_start);
602

    
603
            file_size = url_ftell(pb);
604
            avio_seek(pb, avi->odml_list - 8, SEEK_SET);
605
            ffio_wfourcc(pb, "LIST"); /* Making this AVI OpenDML one */
606
            avio_seek(pb, 16, SEEK_CUR);
607

    
608
            for (n=nb_frames=0;n<s->nb_streams;n++) {
609
                AVCodecContext *stream = s->streams[n]->codec;
610
                AVIStream *avist= s->streams[n]->priv_data;
611

    
612
                if (stream->codec_type == AVMEDIA_TYPE_VIDEO) {
613
                    if (nb_frames < avist->packet_count)
614
                        nb_frames = avist->packet_count;
615
                } else {
616
                    if (stream->codec_id == CODEC_ID_MP2 || stream->codec_id == CODEC_ID_MP3) {
617
                        nb_frames += avist->packet_count;
618
                    }
619
                }
620
            }
621
            avio_wl32(pb, nb_frames);
622
            avio_seek(pb, file_size, SEEK_SET);
623

    
624
            avi_write_counters(s, avi->riff_id);
625
        }
626
    }
627
    put_flush_packet(pb);
628

    
629
    for (i=0; i<s->nb_streams; i++) {
630
         AVIStream *avist= s->streams[i]->priv_data;
631
         for (j=0; j<avist->indexes.ents_allocated/AVI_INDEX_CLUSTER_SIZE; j++)
632
              av_free(avist->indexes.cluster[j]);
633
         av_freep(&avist->indexes.cluster);
634
         avist->indexes.ents_allocated = avist->indexes.entry = 0;
635
    }
636

    
637
    return res;
638
}
639

    
640
AVOutputFormat ff_avi_muxer = {
641
    "avi",
642
    NULL_IF_CONFIG_SMALL("AVI format"),
643
    "video/x-msvideo",
644
    "avi",
645
    sizeof(AVIContext),
646
    CODEC_ID_MP2,
647
    CODEC_ID_MPEG4,
648
    avi_write_header,
649
    avi_write_packet,
650
    avi_write_trailer,
651
    .codec_tag= (const AVCodecTag* const []){ff_codec_bmp_tags, ff_codec_wav_tags, 0},
652
    .flags= AVFMT_VARIABLE_FPS,
653
};