yading@11: /*
yading@11:  * AVI muxer
yading@11:  * Copyright (c) 2000 Fabrice Bellard
yading@11:  *
yading@11:  * This file is part of FFmpeg.
yading@11:  *
yading@11:  * FFmpeg is free software; you can redistribute it and/or
yading@11:  * modify it under the terms of the GNU Lesser General Public
yading@11:  * License as published by the Free Software Foundation; either
yading@11:  * version 2.1 of the License, or (at your option) any later version.
yading@11:  *
yading@11:  * FFmpeg is distributed in the hope that it will be useful,
yading@11:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@11:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@11:  * Lesser General Public License for more details.
yading@11:  *
yading@11:  * You should have received a copy of the GNU Lesser General Public
yading@11:  * License along with FFmpeg; if not, write to the Free Software
yading@11:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@11:  */
yading@11: 
yading@11: //#define DEBUG
yading@11: 
yading@11: #include "avformat.h"
yading@11: #include "internal.h"
yading@11: #include "avi.h"
yading@11: #include "avio_internal.h"
yading@11: #include "riff.h"
yading@11: #include "libavutil/intreadwrite.h"
yading@11: #include "libavutil/dict.h"
yading@11: #include "libavutil/avassert.h"
yading@11: #include "libavutil/timestamp.h"
yading@11: 
yading@11: /*
yading@11:  * TODO:
yading@11:  *  - fill all fields if non streamed (nb_frames for example)
yading@11:  */
yading@11: 
yading@11: typedef struct AVIIentry {
yading@11:     unsigned int flags, pos, len;
yading@11: } AVIIentry;
yading@11: 
yading@11: #define AVI_INDEX_CLUSTER_SIZE 16384
yading@11: 
yading@11: typedef struct AVIIndex {
yading@11:     int64_t     indx_start;
yading@11:     int         entry;
yading@11:     int         ents_allocated;
yading@11:     AVIIentry** cluster;
yading@11: } AVIIndex;
yading@11: 
yading@11: typedef struct {
yading@11:     int64_t riff_start, movi_list, odml_list;
yading@11:     int64_t frames_hdr_all;
yading@11:     int riff_id;
yading@11: } AVIContext;
yading@11: 
yading@11: typedef struct  {
yading@11:     int64_t frames_hdr_strm;
yading@11:     int64_t audio_strm_length;
yading@11:     int packet_count;
yading@11:     int entry;
yading@11: 
yading@11:     AVIIndex indexes;
yading@11: } AVIStream ;
yading@11: 
yading@11: static inline AVIIentry* avi_get_ientry(AVIIndex* idx, int ent_id)
yading@11: {
yading@11:     int cl = ent_id / AVI_INDEX_CLUSTER_SIZE;
yading@11:     int id = ent_id % AVI_INDEX_CLUSTER_SIZE;
yading@11:     return &idx->cluster[cl][id];
yading@11: }
yading@11: 
yading@11: static int64_t avi_start_new_riff(AVFormatContext *s, AVIOContext *pb,
yading@11:                                   const char* riff_tag, const char* list_tag)
yading@11: {
yading@11:     AVIContext *avi= s->priv_data;
yading@11:     int64_t loff;
yading@11:     int i;
yading@11: 
yading@11:     avi->riff_id++;
yading@11:     for (i=0; i<s->nb_streams; i++){
yading@11:         AVIStream *avist= s->streams[i]->priv_data;
yading@11:         avist->indexes.entry = 0;
yading@11:     }
yading@11: 
yading@11:     avi->riff_start = ff_start_tag(pb, "RIFF");
yading@11:     ffio_wfourcc(pb, riff_tag);
yading@11:     loff = ff_start_tag(pb, "LIST");
yading@11:     ffio_wfourcc(pb, list_tag);
yading@11:     return loff;
yading@11: }
yading@11: 
yading@11: static char* avi_stream2fourcc(char* tag, int index, enum AVMediaType type)
yading@11: {
yading@11:     tag[0] = '0' + index/10;
yading@11:     tag[1] = '0' + index%10;
yading@11:     if (type == AVMEDIA_TYPE_VIDEO) {
yading@11:         tag[2] = 'd';
yading@11:         tag[3] = 'c';
yading@11:     } else if (type == AVMEDIA_TYPE_SUBTITLE) {
yading@11:         // note: this is not an official code
yading@11:         tag[2] = 's';
yading@11:         tag[3] = 'b';
yading@11:     } else {
yading@11:         tag[2] = 'w';
yading@11:         tag[3] = 'b';
yading@11:     }
yading@11:     tag[4] = '\0';
yading@11:     return tag;
yading@11: }
yading@11: 
yading@11: static int avi_write_counters(AVFormatContext* s, int riff_id)
yading@11: {
yading@11:     AVIOContext *pb = s->pb;
yading@11:     AVIContext *avi = s->priv_data;
yading@11:     int n, au_byterate, au_ssize, au_scale, nb_frames = 0;
yading@11:     int64_t file_size;
yading@11:     AVCodecContext* stream;
yading@11: 
yading@11:     file_size = avio_tell(pb);
yading@11:     for(n = 0; n < s->nb_streams; n++) {
yading@11:         AVIStream *avist= s->streams[n]->priv_data;
yading@11: 
yading@11:         av_assert0(avist->frames_hdr_strm);
yading@11:         stream = s->streams[n]->codec;
yading@11:         avio_seek(pb, avist->frames_hdr_strm, SEEK_SET);
yading@11:         ff_parse_specific_params(stream, &au_byterate, &au_ssize, &au_scale);
yading@11:         if(au_ssize == 0) {
yading@11:             avio_wl32(pb, avist->packet_count);
yading@11:         } else {
yading@11:             avio_wl32(pb, avist->audio_strm_length / au_ssize);
yading@11:         }
yading@11:         if(stream->codec_type == AVMEDIA_TYPE_VIDEO)
yading@11:             nb_frames = FFMAX(nb_frames, avist->packet_count);
yading@11:     }
yading@11:     if(riff_id == 1) {
yading@11:         av_assert0(avi->frames_hdr_all);
yading@11:         avio_seek(pb, avi->frames_hdr_all, SEEK_SET);
yading@11:         avio_wl32(pb, nb_frames);
yading@11:     }
yading@11:     avio_seek(pb, file_size, SEEK_SET);
yading@11: 
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: static int avi_write_header(AVFormatContext *s)
yading@11: {
yading@11:     AVIContext *avi = s->priv_data;
yading@11:     AVIOContext *pb = s->pb;
yading@11:     int bitrate, n, i, nb_frames, au_byterate, au_ssize, au_scale;
yading@11:     AVCodecContext *stream, *video_enc;
yading@11:     int64_t list1, list2, strh, strf;
yading@11:     AVDictionaryEntry *t = NULL;
yading@11: 
yading@11:     if (s->nb_streams > AVI_MAX_STREAM_COUNT) {
yading@11:         av_log(s, AV_LOG_ERROR, "AVI does not support >%d streams\n",
yading@11:                AVI_MAX_STREAM_COUNT);
yading@11:         return AVERROR(EINVAL);
yading@11:     }
yading@11: 
yading@11:     for(n=0;n<s->nb_streams;n++) {
yading@11:         s->streams[n]->priv_data= av_mallocz(sizeof(AVIStream));
yading@11:         if(!s->streams[n]->priv_data)
yading@11:             return AVERROR(ENOMEM);
yading@11:     }
yading@11: 
yading@11:     /* header list */
yading@11:     avi->riff_id = 0;
yading@11:     list1 = avi_start_new_riff(s, pb, "AVI ", "hdrl");
yading@11: 
yading@11:     /* avi header */
yading@11:     ffio_wfourcc(pb, "avih");
yading@11:     avio_wl32(pb, 14 * 4);
yading@11:     bitrate = 0;
yading@11: 
yading@11:     video_enc = NULL;
yading@11:     for(n=0;n<s->nb_streams;n++) {
yading@11:         stream = s->streams[n]->codec;
yading@11:         bitrate += stream->bit_rate;
yading@11:         if (stream->codec_type == AVMEDIA_TYPE_VIDEO)
yading@11:             video_enc = stream;
yading@11:     }
yading@11: 
yading@11:     nb_frames = 0;
yading@11: 
yading@11:     if(video_enc){
yading@11:         avio_wl32(pb, (uint32_t)(INT64_C(1000000) * video_enc->time_base.num / video_enc->time_base.den));
yading@11:     } else {
yading@11:         avio_wl32(pb, 0);
yading@11:     }
yading@11:     avio_wl32(pb, bitrate / 8); /* XXX: not quite exact */
yading@11:     avio_wl32(pb, 0); /* padding */
yading@11:     if (!pb->seekable)
yading@11:         avio_wl32(pb, AVIF_TRUSTCKTYPE | AVIF_ISINTERLEAVED); /* flags */
yading@11:     else
yading@11:         avio_wl32(pb, AVIF_TRUSTCKTYPE | AVIF_HASINDEX | AVIF_ISINTERLEAVED); /* flags */
yading@11:     avi->frames_hdr_all = avio_tell(pb); /* remember this offset to fill later */
yading@11:     avio_wl32(pb, nb_frames); /* nb frames, filled later */
yading@11:     avio_wl32(pb, 0); /* initial frame */
yading@11:     avio_wl32(pb, s->nb_streams); /* nb streams */
yading@11:     avio_wl32(pb, 1024 * 1024); /* suggested buffer size */
yading@11:     if(video_enc){
yading@11:         avio_wl32(pb, video_enc->width);
yading@11:         avio_wl32(pb, video_enc->height);
yading@11:     } else {
yading@11:         avio_wl32(pb, 0);
yading@11:         avio_wl32(pb, 0);
yading@11:     }
yading@11:     avio_wl32(pb, 0); /* reserved */
yading@11:     avio_wl32(pb, 0); /* reserved */
yading@11:     avio_wl32(pb, 0); /* reserved */
yading@11:     avio_wl32(pb, 0); /* reserved */
yading@11: 
yading@11:     /* stream list */
yading@11:     for(i=0;i<n;i++) {
yading@11:         AVIStream *avist= s->streams[i]->priv_data;
yading@11:         list2 = ff_start_tag(pb, "LIST");
yading@11:         ffio_wfourcc(pb, "strl");
yading@11: 
yading@11:         stream = s->streams[i]->codec;
yading@11: 
yading@11:         /* stream generic header */
yading@11:         strh = ff_start_tag(pb, "strh");
yading@11:         switch(stream->codec_type) {
yading@11:         case AVMEDIA_TYPE_SUBTITLE:
yading@11:             // XSUB subtitles behave like video tracks, other subtitles
yading@11:             // are not (yet) supported.
yading@11:             if (stream->codec_id != AV_CODEC_ID_XSUB) {
yading@11:                 av_log(s, AV_LOG_ERROR, "Subtitle streams other than DivX XSUB are not supported by the AVI muxer.\n");
yading@11:                 return AVERROR_PATCHWELCOME;
yading@11:             }
yading@11:         case AVMEDIA_TYPE_VIDEO: ffio_wfourcc(pb, "vids"); break;
yading@11:         case AVMEDIA_TYPE_AUDIO: ffio_wfourcc(pb, "auds"); break;
yading@11: //      case AVMEDIA_TYPE_TEXT : ffio_wfourcc(pb, "txts"); break;
yading@11:         case AVMEDIA_TYPE_DATA : ffio_wfourcc(pb, "dats"); break;
yading@11:         }
yading@11:         if(stream->codec_type == AVMEDIA_TYPE_VIDEO ||
yading@11:            stream->codec_id == AV_CODEC_ID_XSUB)
yading@11:             avio_wl32(pb, stream->codec_tag);
yading@11:         else
yading@11:             avio_wl32(pb, 1);
yading@11:         avio_wl32(pb, 0); /* flags */
yading@11:         avio_wl16(pb, 0); /* priority */
yading@11:         avio_wl16(pb, 0); /* language */
yading@11:         avio_wl32(pb, 0); /* initial frame */
yading@11: 
yading@11:         ff_parse_specific_params(stream, &au_byterate, &au_ssize, &au_scale);
yading@11: 
yading@11:         if (   stream->codec_type == AVMEDIA_TYPE_VIDEO
yading@11:             && stream->codec_id != AV_CODEC_ID_XSUB
yading@11:             && au_byterate > 1000LL*au_scale) {
yading@11:             au_byterate = 600;
yading@11:             au_scale    = 1;
yading@11:         }
yading@11:         avpriv_set_pts_info(s->streams[i], 64, au_scale, au_byterate);
yading@11:         if(stream->codec_id == AV_CODEC_ID_XSUB)
yading@11:             au_scale = au_byterate = 0;
yading@11: 
yading@11:         avio_wl32(pb, au_scale); /* scale */
yading@11:         avio_wl32(pb, au_byterate); /* rate */
yading@11: 
yading@11:         avio_wl32(pb, 0); /* start */
yading@11:         avist->frames_hdr_strm = avio_tell(pb); /* remember this offset to fill later */
yading@11:         if (!pb->seekable)
yading@11:             avio_wl32(pb, AVI_MAX_RIFF_SIZE); /* FIXME: this may be broken, but who cares */
yading@11:         else
yading@11:             avio_wl32(pb, 0); /* length, XXX: filled later */
yading@11: 
yading@11:         /* suggested buffer size */ //FIXME set at the end to largest chunk
yading@11:         if(stream->codec_type == AVMEDIA_TYPE_VIDEO)
yading@11:             avio_wl32(pb, 1024 * 1024);
yading@11:         else if(stream->codec_type == AVMEDIA_TYPE_AUDIO)
yading@11:             avio_wl32(pb, 12 * 1024);
yading@11:         else
yading@11:             avio_wl32(pb, 0);
yading@11:         avio_wl32(pb, -1); /* quality */
yading@11:         avio_wl32(pb, au_ssize); /* sample size */
yading@11:         avio_wl32(pb, 0);
yading@11:         avio_wl16(pb, stream->width);
yading@11:         avio_wl16(pb, stream->height);
yading@11:         ff_end_tag(pb, strh);
yading@11: 
yading@11:       if(stream->codec_type != AVMEDIA_TYPE_DATA){
yading@11:           int ret;
yading@11: 
yading@11:         strf = ff_start_tag(pb, "strf");
yading@11:         switch(stream->codec_type) {
yading@11:         case AVMEDIA_TYPE_SUBTITLE:
yading@11:             // XSUB subtitles behave like video tracks, other subtitles
yading@11:             // are not (yet) supported.
yading@11:             if (stream->codec_id != AV_CODEC_ID_XSUB) break;
yading@11:         case AVMEDIA_TYPE_VIDEO:
yading@11:             ff_put_bmp_header(pb, stream, ff_codec_bmp_tags, 0);
yading@11:             break;
yading@11:         case AVMEDIA_TYPE_AUDIO:
yading@11:             if ((ret = ff_put_wav_header(pb, stream)) < 0) {
yading@11:                 return ret;
yading@11:             }
yading@11:             break;
yading@11:         default:
yading@11:             av_log(s, AV_LOG_ERROR,
yading@11:                    "Invalid or not supported codec type '%s' found in the input\n",
yading@11:                    (char *)av_x_if_null(av_get_media_type_string(stream->codec_type), "?"));
yading@11:             return AVERROR(EINVAL);
yading@11:         }
yading@11:         ff_end_tag(pb, strf);
yading@11:         if ((t = av_dict_get(s->streams[i]->metadata, "title", NULL, 0))) {
yading@11:             ff_riff_write_info_tag(s->pb, "strn", t->value);
yading@11:             t = NULL;
yading@11:         }
yading@11:       }
yading@11: 
yading@11:         if (pb->seekable) {
yading@11:             unsigned char tag[5];
yading@11:             int j;
yading@11: 
yading@11:             /* Starting to lay out AVI OpenDML master index.
yading@11:              * We want to make it JUNK entry for now, since we'd
yading@11:              * like to get away without making AVI an OpenDML one
yading@11:              * for compatibility reasons.
yading@11:              */
yading@11:             avist->indexes.entry = avist->indexes.ents_allocated = 0;
yading@11:             avist->indexes.indx_start = ff_start_tag(pb, "JUNK");
yading@11:             avio_wl16(pb, 4);        /* wLongsPerEntry */
yading@11:             avio_w8(pb, 0);          /* bIndexSubType (0 == frame index) */
yading@11:             avio_w8(pb, 0);          /* bIndexType (0 == AVI_INDEX_OF_INDEXES) */
yading@11:             avio_wl32(pb, 0);        /* nEntriesInUse (will fill out later on) */
yading@11:             ffio_wfourcc(pb, avi_stream2fourcc(tag, i, stream->codec_type));
yading@11:                                     /* dwChunkId */
yading@11:             avio_wl64(pb, 0);        /* dwReserved[3]
yading@11:             avio_wl32(pb, 0);           Must be 0.    */
yading@11:             for (j=0; j < AVI_MASTER_INDEX_SIZE * 2; j++)
yading@11:                  avio_wl64(pb, 0);
yading@11:             ff_end_tag(pb, avist->indexes.indx_start);
yading@11:         }
yading@11: 
yading@11:         if(   stream->codec_type == AVMEDIA_TYPE_VIDEO
yading@11:            && s->streams[i]->sample_aspect_ratio.num>0
yading@11:            && s->streams[i]->sample_aspect_ratio.den>0){
yading@11:             int vprp= ff_start_tag(pb, "vprp");
yading@11:             AVRational dar = av_mul_q(s->streams[i]->sample_aspect_ratio,
yading@11:                                       (AVRational){stream->width, stream->height});
yading@11:             int num, den;
yading@11:             av_reduce(&num, &den, dar.num, dar.den, 0xFFFF);
yading@11: 
yading@11:             avio_wl32(pb, 0); //video format  = unknown
yading@11:             avio_wl32(pb, 0); //video standard= unknown
yading@11:             avio_wl32(pb, lrintf(1.0/av_q2d(stream->time_base)));
yading@11:             avio_wl32(pb, stream->width );
yading@11:             avio_wl32(pb, stream->height);
yading@11:             avio_wl16(pb, den);
yading@11:             avio_wl16(pb, num);
yading@11:             avio_wl32(pb, stream->width );
yading@11:             avio_wl32(pb, stream->height);
yading@11:             avio_wl32(pb, 1); //progressive FIXME
yading@11: 
yading@11:             avio_wl32(pb, stream->height);
yading@11:             avio_wl32(pb, stream->width );
yading@11:             avio_wl32(pb, stream->height);
yading@11:             avio_wl32(pb, stream->width );
yading@11:             avio_wl32(pb, 0);
yading@11:             avio_wl32(pb, 0);
yading@11: 
yading@11:             avio_wl32(pb, 0);
yading@11:             avio_wl32(pb, 0);
yading@11:             ff_end_tag(pb, vprp);
yading@11:         }
yading@11: 
yading@11:         ff_end_tag(pb, list2);
yading@11:     }
yading@11: 
yading@11:     if (pb->seekable) {
yading@11:         /* AVI could become an OpenDML one, if it grows beyond 2Gb range */
yading@11:         avi->odml_list = ff_start_tag(pb, "JUNK");
yading@11:         ffio_wfourcc(pb, "odml");
yading@11:         ffio_wfourcc(pb, "dmlh");
yading@11:         avio_wl32(pb, 248);
yading@11:         for (i = 0; i < 248; i+= 4)
yading@11:              avio_wl32(pb, 0);
yading@11:         ff_end_tag(pb, avi->odml_list);
yading@11:     }
yading@11: 
yading@11:     ff_end_tag(pb, list1);
yading@11: 
yading@11:     ff_riff_write_info(s);
yading@11: 
yading@11:     /* some padding for easier tag editing */
yading@11:     list2 = ff_start_tag(pb, "JUNK");
yading@11:     for (i = 0; i < 1016; i += 4)
yading@11:         avio_wl32(pb, 0);
yading@11:     ff_end_tag(pb, list2);
yading@11: 
yading@11:     avi->movi_list = ff_start_tag(pb, "LIST");
yading@11:     ffio_wfourcc(pb, "movi");
yading@11: 
yading@11:     avio_flush(pb);
yading@11: 
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: static int avi_write_ix(AVFormatContext *s)
yading@11: {
yading@11:     AVIOContext *pb = s->pb;
yading@11:     AVIContext *avi = s->priv_data;
yading@11:     char tag[5];
yading@11:     char ix_tag[] = "ix00";
yading@11:     int i, j;
yading@11: 
yading@11:     av_assert0(pb->seekable);
yading@11: 
yading@11:     if (avi->riff_id > AVI_MASTER_INDEX_SIZE) {
yading@11:         av_log(s, AV_LOG_ERROR, "Invalid riff index %d > %d\n",
yading@11:                avi->riff_id, AVI_MASTER_INDEX_SIZE);
yading@11:         return AVERROR(EINVAL);
yading@11:     }
yading@11: 
yading@11:     for (i=0;i<s->nb_streams;i++) {
yading@11:         AVIStream *avist= s->streams[i]->priv_data;
yading@11:          int64_t ix, pos;
yading@11: 
yading@11:          avi_stream2fourcc(tag, i, s->streams[i]->codec->codec_type);
yading@11:          ix_tag[3] = '0' + i;
yading@11: 
yading@11:          /* Writing AVI OpenDML leaf index chunk */
yading@11:          ix = avio_tell(pb);
yading@11:          ffio_wfourcc(pb, ix_tag);     /* ix?? */
yading@11:          avio_wl32(pb, avist->indexes.entry * 8 + 24);
yading@11:                                       /* chunk size */
yading@11:          avio_wl16(pb, 2);             /* wLongsPerEntry */
yading@11:          avio_w8(pb, 0);             /* bIndexSubType (0 == frame index) */
yading@11:          avio_w8(pb, 1);             /* bIndexType (1 == AVI_INDEX_OF_CHUNKS) */
yading@11:          avio_wl32(pb, avist->indexes.entry);
yading@11:                                       /* nEntriesInUse */
yading@11:          ffio_wfourcc(pb, tag);        /* dwChunkId */
yading@11:          avio_wl64(pb, avi->movi_list);/* qwBaseOffset */
yading@11:          avio_wl32(pb, 0);             /* dwReserved_3 (must be 0) */
yading@11: 
yading@11:          for (j=0; j<avist->indexes.entry; j++) {
yading@11:              AVIIentry* ie = avi_get_ientry(&avist->indexes, j);
yading@11:              avio_wl32(pb, ie->pos + 8);
yading@11:              avio_wl32(pb, ((uint32_t)ie->len & ~0x80000000) |
yading@11:                           (ie->flags & 0x10 ? 0 : 0x80000000));
yading@11:          }
yading@11:          avio_flush(pb);
yading@11:          pos = avio_tell(pb);
yading@11: 
yading@11:          /* Updating one entry in the AVI OpenDML master index */
yading@11:          avio_seek(pb, avist->indexes.indx_start - 8, SEEK_SET);
yading@11:          ffio_wfourcc(pb, "indx");            /* enabling this entry */
yading@11:          avio_skip(pb, 8);
yading@11:          avio_wl32(pb, avi->riff_id);         /* nEntriesInUse */
yading@11:          avio_skip(pb, 16*avi->riff_id);
yading@11:          avio_wl64(pb, ix);                   /* qwOffset */
yading@11:          avio_wl32(pb, pos - ix);             /* dwSize */
yading@11:          avio_wl32(pb, avist->indexes.entry); /* dwDuration */
yading@11: 
yading@11:          avio_seek(pb, pos, SEEK_SET);
yading@11:     }
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: static int avi_write_idx1(AVFormatContext *s)
yading@11: {
yading@11:     AVIOContext *pb = s->pb;
yading@11:     AVIContext *avi = s->priv_data;
yading@11:     int64_t idx_chunk;
yading@11:     int i;
yading@11:     char tag[5];
yading@11: 
yading@11:     if (pb->seekable) {
yading@11:         AVIStream *avist;
yading@11:         AVIIentry* ie = 0, *tie;
yading@11:         int empty, stream_id = -1;
yading@11: 
yading@11:         idx_chunk = ff_start_tag(pb, "idx1");
yading@11:         for(i=0; i<s->nb_streams; i++){
yading@11:             avist= s->streams[i]->priv_data;
yading@11:             avist->entry=0;
yading@11:         }
yading@11: 
yading@11:         do {
yading@11:             empty = 1;
yading@11:             for (i=0; i<s->nb_streams; i++) {
yading@11:                 avist= s->streams[i]->priv_data;
yading@11:                  if (avist->indexes.entry <= avist->entry)
yading@11:                      continue;
yading@11: 
yading@11:                  tie = avi_get_ientry(&avist->indexes, avist->entry);
yading@11:                  if (empty || tie->pos < ie->pos) {
yading@11:                      ie = tie;
yading@11:                      stream_id = i;
yading@11:                  }
yading@11:                  empty = 0;
yading@11:             }
yading@11:             if (!empty) {
yading@11:                 avist= s->streams[stream_id]->priv_data;
yading@11:                 avi_stream2fourcc(tag, stream_id,
yading@11:                                   s->streams[stream_id]->codec->codec_type);
yading@11:                 ffio_wfourcc(pb, tag);
yading@11:                 avio_wl32(pb, ie->flags);
yading@11:                 avio_wl32(pb, ie->pos);
yading@11:                 avio_wl32(pb, ie->len);
yading@11:                 avist->entry++;
yading@11:             }
yading@11:         } while (!empty);
yading@11:         ff_end_tag(pb, idx_chunk);
yading@11: 
yading@11:         avi_write_counters(s, avi->riff_id);
yading@11:     }
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: static int avi_write_packet(AVFormatContext *s, AVPacket *pkt)
yading@11: {
yading@11:     AVIContext *avi = s->priv_data;
yading@11:     AVIOContext *pb = s->pb;
yading@11:     unsigned char tag[5];
yading@11:     unsigned int flags=0;
yading@11:     const int stream_index= pkt->stream_index;
yading@11:     AVIStream *avist= s->streams[stream_index]->priv_data;
yading@11:     AVCodecContext *enc= s->streams[stream_index]->codec;
yading@11:     int size= pkt->size;
yading@11: 
yading@11:     av_dlog(s, "dts:%s packet_count:%d stream_index:%d\n", av_ts2str(pkt->dts), avist->packet_count, stream_index);
yading@11:     while(enc->block_align==0 && pkt->dts != AV_NOPTS_VALUE && pkt->dts > avist->packet_count && enc->codec_id != AV_CODEC_ID_XSUB){
yading@11:         AVPacket empty_packet;
yading@11: 
yading@11:         if(pkt->dts - avist->packet_count > 60000){
yading@11:             av_log(s, AV_LOG_ERROR, "Too large number of skipped frames %"PRId64" > 60000\n", pkt->dts - avist->packet_count);
yading@11:             return AVERROR(EINVAL);
yading@11:         }
yading@11: 
yading@11:         av_init_packet(&empty_packet);
yading@11:         empty_packet.size= 0;
yading@11:         empty_packet.data= NULL;
yading@11:         empty_packet.stream_index= stream_index;
yading@11:         avi_write_packet(s, &empty_packet);
yading@11:         av_dlog(s, "dup dts:%s packet_count:%d\n", av_ts2str(pkt->dts), avist->packet_count);
yading@11:     }
yading@11:     avist->packet_count++;
yading@11: 
yading@11:     // Make sure to put an OpenDML chunk when the file size exceeds the limits
yading@11:     if (pb->seekable &&
yading@11:         (avio_tell(pb) - avi->riff_start > AVI_MAX_RIFF_SIZE)) {
yading@11: 
yading@11:         avi_write_ix(s);
yading@11:         ff_end_tag(pb, avi->movi_list);
yading@11: 
yading@11:         if (avi->riff_id == 1)
yading@11:             avi_write_idx1(s);
yading@11: 
yading@11:         ff_end_tag(pb, avi->riff_start);
yading@11:         avi->movi_list = avi_start_new_riff(s, pb, "AVIX", "movi");
yading@11:     }
yading@11: 
yading@11:     avi_stream2fourcc(tag, stream_index, enc->codec_type);
yading@11:     if(pkt->flags&AV_PKT_FLAG_KEY)
yading@11:         flags = 0x10;
yading@11:     if (enc->codec_type == AVMEDIA_TYPE_AUDIO) {
yading@11:        avist->audio_strm_length += size;
yading@11:     }
yading@11: 
yading@11:     if (s->pb->seekable) {
yading@11:         AVIIndex* idx = &avist->indexes;
yading@11:         int cl = idx->entry / AVI_INDEX_CLUSTER_SIZE;
yading@11:         int id = idx->entry % AVI_INDEX_CLUSTER_SIZE;
yading@11:         if (idx->ents_allocated <= idx->entry) {
yading@11:             idx->cluster = av_realloc_f(idx->cluster, sizeof(void*), cl+1);
yading@11:             if (!idx->cluster)
yading@11:                 return AVERROR(ENOMEM);
yading@11:             idx->cluster[cl] = av_malloc(AVI_INDEX_CLUSTER_SIZE*sizeof(AVIIentry));
yading@11:             if (!idx->cluster[cl])
yading@11:                 return AVERROR(ENOMEM);
yading@11:             idx->ents_allocated += AVI_INDEX_CLUSTER_SIZE;
yading@11:         }
yading@11: 
yading@11:         idx->cluster[cl][id].flags = flags;
yading@11:         idx->cluster[cl][id].pos = avio_tell(pb) - avi->movi_list;
yading@11:         idx->cluster[cl][id].len = size;
yading@11:         idx->entry++;
yading@11:     }
yading@11: 
yading@11:     avio_write(pb, tag, 4);
yading@11:     avio_wl32(pb, size);
yading@11:     avio_write(pb, pkt->data, size);
yading@11:     if (size & 1)
yading@11:         avio_w8(pb, 0);
yading@11: 
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: static int avi_write_trailer(AVFormatContext *s)
yading@11: {
yading@11:     AVIContext *avi = s->priv_data;
yading@11:     AVIOContext *pb = s->pb;
yading@11:     int res = 0;
yading@11:     int i, j, n, nb_frames;
yading@11:     int64_t file_size;
yading@11: 
yading@11:     if (pb->seekable){
yading@11:         if (avi->riff_id == 1) {
yading@11:             ff_end_tag(pb, avi->movi_list);
yading@11:             res = avi_write_idx1(s);
yading@11:             ff_end_tag(pb, avi->riff_start);
yading@11:         } else {
yading@11:             avi_write_ix(s);
yading@11:             ff_end_tag(pb, avi->movi_list);
yading@11:             ff_end_tag(pb, avi->riff_start);
yading@11: 
yading@11:             file_size = avio_tell(pb);
yading@11:             avio_seek(pb, avi->odml_list - 8, SEEK_SET);
yading@11:             ffio_wfourcc(pb, "LIST"); /* Making this AVI OpenDML one */
yading@11:             avio_skip(pb, 16);
yading@11: 
yading@11:             for (n=nb_frames=0;n<s->nb_streams;n++) {
yading@11:                 AVCodecContext *stream = s->streams[n]->codec;
yading@11:                 AVIStream *avist= s->streams[n]->priv_data;
yading@11: 
yading@11:                 if (stream->codec_type == AVMEDIA_TYPE_VIDEO) {
yading@11:                     if (nb_frames < avist->packet_count)
yading@11:                         nb_frames = avist->packet_count;
yading@11:                 } else {
yading@11:                     if (stream->codec_id == AV_CODEC_ID_MP2 || stream->codec_id == AV_CODEC_ID_MP3) {
yading@11:                         nb_frames += avist->packet_count;
yading@11:                     }
yading@11:                 }
yading@11:             }
yading@11:             avio_wl32(pb, nb_frames);
yading@11:             avio_seek(pb, file_size, SEEK_SET);
yading@11: 
yading@11:             avi_write_counters(s, avi->riff_id);
yading@11:         }
yading@11:     }
yading@11: 
yading@11:     for (i=0; i<s->nb_streams; i++) {
yading@11:          AVIStream *avist= s->streams[i]->priv_data;
yading@11:          for (j=0; j<avist->indexes.ents_allocated/AVI_INDEX_CLUSTER_SIZE; j++)
yading@11:               av_free(avist->indexes.cluster[j]);
yading@11:          av_freep(&avist->indexes.cluster);
yading@11:          avist->indexes.ents_allocated = avist->indexes.entry = 0;
yading@11:     }
yading@11: 
yading@11:     return res;
yading@11: }
yading@11: 
yading@11: AVOutputFormat ff_avi_muxer = {
yading@11:     .name              = "avi",
yading@11:     .long_name         = NULL_IF_CONFIG_SMALL("AVI (Audio Video Interleaved)"),
yading@11:     .mime_type         = "video/x-msvideo",
yading@11:     .extensions        = "avi",
yading@11:     .priv_data_size    = sizeof(AVIContext),
yading@11:     .audio_codec       = CONFIG_LIBMP3LAME ? AV_CODEC_ID_MP3 : AV_CODEC_ID_AC3,
yading@11:     .video_codec       = AV_CODEC_ID_MPEG4,
yading@11:     .write_header      = avi_write_header,
yading@11:     .write_packet      = avi_write_packet,
yading@11:     .write_trailer     = avi_write_trailer,
yading@11:     .codec_tag         = (const AVCodecTag* const []){
yading@11:         ff_codec_bmp_tags, ff_codec_wav_tags, 0
yading@11:     },
yading@11:     .flags             = AVFMT_VARIABLE_FPS,
yading@11: };