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ffmpeg / libavformat / avienc.c @ e910a77b

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/*
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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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 */
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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

    
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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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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 AVMediaType 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 == AVMEDIA_TYPE_VIDEO) {
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        tag[2] = 'd';
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        tag[3] = 'c';
93
    } else if (type == AVMEDIA_TYPE_SUBTITLE) {
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        // note: this is not an official code
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        tag[2] = 's';
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        tag[3] = 'b';
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    } else {
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        tag[2] = 'w';
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        tag[3] = 'b';
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    }
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)
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{
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    int len = strlen(str);
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    if (len > 0) {
109
        len++;
110
        put_tag(pb, tag);
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        put_le32(pb, len);
112
        avio_put_str(pb, str);
113
        if (len & 1)
114
            put_byte(pb, 0);
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    }
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}
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);
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    for(n = 0; n < s->nb_streams; n++) {
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        AVIStream *avist= s->streams[n]->priv_data;
129

    
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        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) {
135
            put_le32(pb, avist->packet_count);
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        } 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 == AVMEDIA_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);
146
    }
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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;
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    AVCodecContext *stream, *video_enc;
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    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 == AVMEDIA_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 AVMEDIA_TYPE_SUBTITLE:
226
            // XSUB subtitles behave like video tracks, other subtitles
227
            // are not (yet) supported.
228
            if (stream->codec_id != CODEC_ID_XSUB) {
229
                av_log(s, AV_LOG_ERROR, "Subtitle streams other than DivX XSUB are not supported by the AVI muxer.\n");
230
                return AVERROR_PATCHWELCOME;
231
            }
232
        case AVMEDIA_TYPE_VIDEO: put_tag(pb, "vids"); break;
233
        case AVMEDIA_TYPE_AUDIO: put_tag(pb, "auds"); break;
234
//        case AVMEDIA_TYPE_TEXT : put_tag(pb, "txts"); break;
235
        case AVMEDIA_TYPE_DATA : put_tag(pb, "dats"); break;
236
        }
237
        if(stream->codec_type == AVMEDIA_TYPE_VIDEO ||
238
           stream->codec_id == CODEC_ID_XSUB)
239
            put_le32(pb, stream->codec_tag);
240
        else
241
            put_le32(pb, 1);
242
        put_le32(pb, 0); /* flags */
243
        put_le16(pb, 0); /* priority */
244
        put_le16(pb, 0); /* language */
245
        put_le32(pb, 0); /* initial frame */
246

    
247
        ff_parse_specific_params(stream, &au_byterate, &au_ssize, &au_scale);
248

    
249
        put_le32(pb, au_scale); /* scale */
250
        put_le32(pb, au_byterate); /* rate */
251
        av_set_pts_info(s->streams[i], 64, au_scale, au_byterate);
252

    
253
        put_le32(pb, 0); /* start */
254
        avist->frames_hdr_strm = url_ftell(pb); /* remember this offset to fill later */
255
        if (url_is_streamed(pb))
256
            put_le32(pb, AVI_MAX_RIFF_SIZE); /* FIXME: this may be broken, but who cares */
257
        else
258
            put_le32(pb, 0); /* length, XXX: filled later */
259

    
260
        /* suggested buffer size */ //FIXME set at the end to largest chunk
261
        if(stream->codec_type == AVMEDIA_TYPE_VIDEO)
262
            put_le32(pb, 1024 * 1024);
263
        else if(stream->codec_type == AVMEDIA_TYPE_AUDIO)
264
            put_le32(pb, 12 * 1024);
265
        else
266
            put_le32(pb, 0);
267
        put_le32(pb, -1); /* quality */
268
        put_le32(pb, au_ssize); /* sample size */
269
        put_le32(pb, 0);
270
        put_le16(pb, stream->width);
271
        put_le16(pb, stream->height);
272
        ff_end_tag(pb, strh);
273

    
274
      if(stream->codec_type != AVMEDIA_TYPE_DATA){
275
        strf = ff_start_tag(pb, "strf");
276
        switch(stream->codec_type) {
277
        case AVMEDIA_TYPE_SUBTITLE:
278
            // XSUB subtitles behave like video tracks, other subtitles
279
            // are not (yet) supported.
280
            if (stream->codec_id != CODEC_ID_XSUB) break;
281
        case AVMEDIA_TYPE_VIDEO:
282
            ff_put_bmp_header(pb, stream, ff_codec_bmp_tags, 0);
283
            break;
284
        case AVMEDIA_TYPE_AUDIO:
285
            if (ff_put_wav_header(pb, stream) < 0) {
286
                return -1;
287
            }
288
            break;
289
        default:
290
            return -1;
291
        }
292
        ff_end_tag(pb, strf);
293
        if ((t = av_metadata_get(s->streams[i]->metadata, "title", NULL, 0))) {
294
            avi_write_info_tag(s->pb, "strn", t->value);
295
            t = NULL;
296
        }
297
      }
298

    
299
        if (!url_is_streamed(pb)) {
300
            unsigned char tag[5];
301
            int j;
302

    
303
            /* Starting to lay out AVI OpenDML master index.
304
             * We want to make it JUNK entry for now, since we'd
305
             * like to get away without making AVI an OpenDML one
306
             * for compatibility reasons.
307
             */
308
            avist->indexes.entry = avist->indexes.ents_allocated = 0;
309
            avist->indexes.indx_start = ff_start_tag(pb, "JUNK");
310
            put_le16(pb, 4);        /* wLongsPerEntry */
311
            put_byte(pb, 0);        /* bIndexSubType (0 == frame index) */
312
            put_byte(pb, 0);        /* bIndexType (0 == AVI_INDEX_OF_INDEXES) */
313
            put_le32(pb, 0);        /* nEntriesInUse (will fill out later on) */
314
            put_tag(pb, avi_stream2fourcc(&tag[0], i, stream->codec_type));
315
                                    /* dwChunkId */
316
            put_le64(pb, 0);        /* dwReserved[3]
317
            put_le32(pb, 0);           Must be 0.    */
318
            for (j=0; j < AVI_MASTER_INDEX_SIZE * 2; j++)
319
                 put_le64(pb, 0);
320
            ff_end_tag(pb, avist->indexes.indx_start);
321
        }
322

    
323
        if(   stream->codec_type == AVMEDIA_TYPE_VIDEO
324
           && s->streams[i]->sample_aspect_ratio.num>0
325
           && s->streams[i]->sample_aspect_ratio.den>0){
326
            int vprp= ff_start_tag(pb, "vprp");
327
            AVRational dar = av_mul_q(s->streams[i]->sample_aspect_ratio,
328
                                      (AVRational){stream->width, stream->height});
329
            int num, den;
330
            av_reduce(&num, &den, dar.num, dar.den, 0xFFFF);
331

    
332
            put_le32(pb, 0); //video format  = unknown
333
            put_le32(pb, 0); //video standard= unknown
334
            put_le32(pb, lrintf(1.0/av_q2d(stream->time_base)));
335
            put_le32(pb, stream->width );
336
            put_le32(pb, stream->height);
337
            put_le16(pb, den);
338
            put_le16(pb, num);
339
            put_le32(pb, stream->width );
340
            put_le32(pb, stream->height);
341
            put_le32(pb, 1); //progressive FIXME
342

    
343
            put_le32(pb, stream->height);
344
            put_le32(pb, stream->width );
345
            put_le32(pb, stream->height);
346
            put_le32(pb, stream->width );
347
            put_le32(pb, 0);
348
            put_le32(pb, 0);
349

    
350
            put_le32(pb, 0);
351
            put_le32(pb, 0);
352
            ff_end_tag(pb, vprp);
353
        }
354

    
355
        ff_end_tag(pb, list2);
356
    }
357

    
358
    if (!url_is_streamed(pb)) {
359
        /* AVI could become an OpenDML one, if it grows beyond 2Gb range */
360
        avi->odml_list = ff_start_tag(pb, "JUNK");
361
        put_tag(pb, "odml");
362
        put_tag(pb, "dmlh");
363
        put_le32(pb, 248);
364
        for (i = 0; i < 248; i+= 4)
365
             put_le32(pb, 0);
366
        ff_end_tag(pb, avi->odml_list);
367
    }
368

    
369
    ff_end_tag(pb, list1);
370

    
371
    list2 = ff_start_tag(pb, "LIST");
372
    put_tag(pb, "INFO");
373
    ff_metadata_conv(&s->metadata, ff_avi_metadata_conv, NULL);
374
    for (i = 0; *ff_avi_tags[i]; i++) {
375
        if ((t = av_metadata_get(s->metadata, ff_avi_tags[i], NULL, AV_METADATA_MATCH_CASE)))
376
            avi_write_info_tag(s->pb, t->key, t->value);
377
    }
378
    ff_end_tag(pb, list2);
379

    
380
    /* some padding for easier tag editing */
381
    list2 = ff_start_tag(pb, "JUNK");
382
    for (i = 0; i < 1016; i += 4)
383
        put_le32(pb, 0);
384
    ff_end_tag(pb, list2);
385

    
386
    avi->movi_list = ff_start_tag(pb, "LIST");
387
    put_tag(pb, "movi");
388

    
389
    put_flush_packet(pb);
390

    
391
    return 0;
392
}
393

    
394
static int avi_write_ix(AVFormatContext *s)
395
{
396
    ByteIOContext *pb = s->pb;
397
    AVIContext *avi = s->priv_data;
398
    char tag[5];
399
    char ix_tag[] = "ix00";
400
    int i, j;
401

    
402
    assert(!url_is_streamed(pb));
403

    
404
    if (avi->riff_id > AVI_MASTER_INDEX_SIZE)
405
        return -1;
406

    
407
    for (i=0;i<s->nb_streams;i++) {
408
        AVIStream *avist= s->streams[i]->priv_data;
409
         int64_t ix, pos;
410

    
411
         avi_stream2fourcc(&tag[0], i, s->streams[i]->codec->codec_type);
412
         ix_tag[3] = '0' + i;
413

    
414
         /* Writing AVI OpenDML leaf index chunk */
415
         ix = url_ftell(pb);
416
         put_tag(pb, &ix_tag[0]);     /* ix?? */
417
         put_le32(pb, avist->indexes.entry * 8 + 24);
418
                                      /* chunk size */
419
         put_le16(pb, 2);             /* wLongsPerEntry */
420
         put_byte(pb, 0);             /* bIndexSubType (0 == frame index) */
421
         put_byte(pb, 1);             /* bIndexType (1 == AVI_INDEX_OF_CHUNKS) */
422
         put_le32(pb, avist->indexes.entry);
423
                                      /* nEntriesInUse */
424
         put_tag(pb, &tag[0]);        /* dwChunkId */
425
         put_le64(pb, avi->movi_list);/* qwBaseOffset */
426
         put_le32(pb, 0);             /* dwReserved_3 (must be 0) */
427

    
428
         for (j=0; j<avist->indexes.entry; j++) {
429
             AVIIentry* ie = avi_get_ientry(&avist->indexes, j);
430
             put_le32(pb, ie->pos + 8);
431
             put_le32(pb, ((uint32_t)ie->len & ~0x80000000) |
432
                          (ie->flags & 0x10 ? 0 : 0x80000000));
433
         }
434
         put_flush_packet(pb);
435
         pos = url_ftell(pb);
436

    
437
         /* Updating one entry in the AVI OpenDML master index */
438
         url_fseek(pb, avist->indexes.indx_start - 8, SEEK_SET);
439
         put_tag(pb, "indx");                 /* enabling this entry */
440
         url_fskip(pb, 8);
441
         put_le32(pb, avi->riff_id);          /* nEntriesInUse */
442
         url_fskip(pb, 16*avi->riff_id);
443
         put_le64(pb, ix);                    /* qwOffset */
444
         put_le32(pb, pos - ix);              /* dwSize */
445
         put_le32(pb, avist->indexes.entry); /* dwDuration */
446

    
447
         url_fseek(pb, pos, SEEK_SET);
448
    }
449
    return 0;
450
}
451

    
452
static int avi_write_idx1(AVFormatContext *s)
453
{
454
    ByteIOContext *pb = s->pb;
455
    AVIContext *avi = s->priv_data;
456
    int64_t idx_chunk;
457
    int i;
458
    char tag[5];
459

    
460
    if (!url_is_streamed(pb)) {
461
        AVIStream *avist;
462
        AVIIentry* ie = 0, *tie;
463
        int empty, stream_id = -1;
464

    
465
        idx_chunk = ff_start_tag(pb, "idx1");
466
        for(i=0; i<s->nb_streams; i++){
467
            avist= s->streams[i]->priv_data;
468
            avist->entry=0;
469
        }
470

    
471
        do {
472
            empty = 1;
473
            for (i=0; i<s->nb_streams; i++) {
474
                avist= s->streams[i]->priv_data;
475
                 if (avist->indexes.entry <= avist->entry)
476
                     continue;
477

    
478
                 tie = avi_get_ientry(&avist->indexes, avist->entry);
479
                 if (empty || tie->pos < ie->pos) {
480
                     ie = tie;
481
                     stream_id = i;
482
                 }
483
                 empty = 0;
484
            }
485
            if (!empty) {
486
                avist= s->streams[stream_id]->priv_data;
487
                avi_stream2fourcc(&tag[0], stream_id,
488
                                  s->streams[stream_id]->codec->codec_type);
489
                put_tag(pb, &tag[0]);
490
                put_le32(pb, ie->flags);
491
                put_le32(pb, ie->pos);
492
                put_le32(pb, ie->len);
493
                avist->entry++;
494
            }
495
        } while (!empty);
496
        ff_end_tag(pb, idx_chunk);
497

    
498
        avi_write_counters(s, avi->riff_id);
499
    }
500
    return 0;
501
}
502

    
503
static int avi_write_packet(AVFormatContext *s, AVPacket *pkt)
504
{
505
    AVIContext *avi = s->priv_data;
506
    ByteIOContext *pb = s->pb;
507
    unsigned char tag[5];
508
    unsigned int flags=0;
509
    const int stream_index= pkt->stream_index;
510
    AVIStream *avist= s->streams[stream_index]->priv_data;
511
    AVCodecContext *enc= s->streams[stream_index]->codec;
512
    int size= pkt->size;
513

    
514
//    av_log(s, AV_LOG_DEBUG, "%"PRId64" %d %d\n", pkt->dts, avi->packet_count[stream_index], stream_index);
515
    while(enc->block_align==0 && pkt->dts != AV_NOPTS_VALUE && pkt->dts > avist->packet_count){
516
        AVPacket empty_packet;
517

    
518
        av_init_packet(&empty_packet);
519
        empty_packet.size= 0;
520
        empty_packet.data= NULL;
521
        empty_packet.stream_index= stream_index;
522
        avi_write_packet(s, &empty_packet);
523
//        av_log(s, AV_LOG_DEBUG, "dup %"PRId64" %d\n", pkt->dts, avi->packet_count[stream_index]);
524
    }
525
    avist->packet_count++;
526

    
527
    // Make sure to put an OpenDML chunk when the file size exceeds the limits
528
    if (!url_is_streamed(pb) &&
529
        (url_ftell(pb) - avi->riff_start > AVI_MAX_RIFF_SIZE)) {
530

    
531
        avi_write_ix(s);
532
        ff_end_tag(pb, avi->movi_list);
533

    
534
        if (avi->riff_id == 1)
535
            avi_write_idx1(s);
536

    
537
        ff_end_tag(pb, avi->riff_start);
538
        avi->movi_list = avi_start_new_riff(s, pb, "AVIX", "movi");
539
    }
540

    
541
    avi_stream2fourcc(&tag[0], stream_index, enc->codec_type);
542
    if(pkt->flags&AV_PKT_FLAG_KEY)
543
        flags = 0x10;
544
    if (enc->codec_type == AVMEDIA_TYPE_AUDIO) {
545
       avist->audio_strm_length += size;
546
    }
547

    
548
    if (!url_is_streamed(s->pb)) {
549
        AVIIndex* idx = &avist->indexes;
550
        int cl = idx->entry / AVI_INDEX_CLUSTER_SIZE;
551
        int id = idx->entry % AVI_INDEX_CLUSTER_SIZE;
552
        if (idx->ents_allocated <= idx->entry) {
553
            idx->cluster = av_realloc(idx->cluster, (cl+1)*sizeof(void*));
554
            if (!idx->cluster)
555
                return -1;
556
            idx->cluster[cl] = av_malloc(AVI_INDEX_CLUSTER_SIZE*sizeof(AVIIentry));
557
            if (!idx->cluster[cl])
558
                return -1;
559
            idx->ents_allocated += AVI_INDEX_CLUSTER_SIZE;
560
        }
561

    
562
        idx->cluster[cl][id].flags = flags;
563
        idx->cluster[cl][id].pos = url_ftell(pb) - avi->movi_list;
564
        idx->cluster[cl][id].len = size;
565
        idx->entry++;
566
    }
567

    
568
    put_buffer(pb, tag, 4);
569
    put_le32(pb, size);
570
    put_buffer(pb, pkt->data, size);
571
    if (size & 1)
572
        put_byte(pb, 0);
573

    
574
    put_flush_packet(pb);
575
    return 0;
576
}
577

    
578
static int avi_write_trailer(AVFormatContext *s)
579
{
580
    AVIContext *avi = s->priv_data;
581
    ByteIOContext *pb = s->pb;
582
    int res = 0;
583
    int i, j, n, nb_frames;
584
    int64_t file_size;
585

    
586
    if (!url_is_streamed(pb)){
587
        if (avi->riff_id == 1) {
588
            ff_end_tag(pb, avi->movi_list);
589
            res = avi_write_idx1(s);
590
            ff_end_tag(pb, avi->riff_start);
591
        } else {
592
            avi_write_ix(s);
593
            ff_end_tag(pb, avi->movi_list);
594
            ff_end_tag(pb, avi->riff_start);
595

    
596
            file_size = url_ftell(pb);
597
            url_fseek(pb, avi->odml_list - 8, SEEK_SET);
598
            put_tag(pb, "LIST"); /* Making this AVI OpenDML one */
599
            url_fskip(pb, 16);
600

    
601
            for (n=nb_frames=0;n<s->nb_streams;n++) {
602
                AVCodecContext *stream = s->streams[n]->codec;
603
                AVIStream *avist= s->streams[n]->priv_data;
604

    
605
                if (stream->codec_type == AVMEDIA_TYPE_VIDEO) {
606
                    if (nb_frames < avist->packet_count)
607
                        nb_frames = avist->packet_count;
608
                } else {
609
                    if (stream->codec_id == CODEC_ID_MP2 || stream->codec_id == CODEC_ID_MP3) {
610
                        nb_frames += avist->packet_count;
611
                    }
612
                }
613
            }
614
            put_le32(pb, nb_frames);
615
            url_fseek(pb, file_size, SEEK_SET);
616

    
617
            avi_write_counters(s, avi->riff_id);
618
        }
619
    }
620
    put_flush_packet(pb);
621

    
622
    for (i=0; i<s->nb_streams; i++) {
623
         AVIStream *avist= s->streams[i]->priv_data;
624
         for (j=0; j<avist->indexes.ents_allocated/AVI_INDEX_CLUSTER_SIZE; j++)
625
              av_free(avist->indexes.cluster[j]);
626
         av_freep(&avist->indexes.cluster);
627
         avist->indexes.ents_allocated = avist->indexes.entry = 0;
628
    }
629

    
630
    return res;
631
}
632

    
633
AVOutputFormat avi_muxer = {
634
    "avi",
635
    NULL_IF_CONFIG_SMALL("AVI format"),
636
    "video/x-msvideo",
637
    "avi",
638
    sizeof(AVIContext),
639
    CODEC_ID_MP2,
640
    CODEC_ID_MPEG4,
641
    avi_write_header,
642
    avi_write_packet,
643
    avi_write_trailer,
644
    .codec_tag= (const AVCodecTag* const []){ff_codec_bmp_tags, ff_codec_wav_tags, 0},
645
    .flags= AVFMT_VARIABLE_FPS,
646
};