3 * Copyright (c) 2000 Fabrice Bellard.
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
27 * - fill all fields if non streamed (nb_frames for example)
30 #ifdef CONFIG_AVI_MUXER
31 typedef struct AVIIentry {
32 unsigned int flags, pos, len;
35 #define AVI_INDEX_CLUSTER_SIZE 16384
37 typedef struct AVIIndex {
45 offset_t riff_start, movi_list, odml_list;
46 offset_t frames_hdr_all, frames_hdr_strm[MAX_STREAMS];
47 int audio_strm_length[MAX_STREAMS];
49 int packet_count[MAX_STREAMS];
51 AVIIndex indexes[MAX_STREAMS];
54 static inline AVIIentry* avi_get_ientry(AVIIndex* idx, int ent_id)
56 int cl = ent_id / AVI_INDEX_CLUSTER_SIZE;
57 int id = ent_id % AVI_INDEX_CLUSTER_SIZE;
58 return &idx->cluster[cl][id];
61 static offset_t avi_start_new_riff(AVIContext *avi, ByteIOContext *pb,
62 const char* riff_tag, const char* list_tag)
68 for (i=0; i<MAX_STREAMS; i++)
69 avi->indexes[i].entry = 0;
71 avi->riff_start = start_tag(pb, "RIFF");
72 put_tag(pb, riff_tag);
73 loff = start_tag(pb, "LIST");
74 put_tag(pb, list_tag);
78 static char* avi_stream2fourcc(char* tag, int index, enum CodecType type)
82 if (type == CODEC_TYPE_VIDEO) {
93 static void avi_write_info_tag(ByteIOContext *pb, const char *tag, const char *str)
95 int len = strlen(str);
106 static int avi_write_counters(AVFormatContext* s, int riff_id)
108 ByteIOContext *pb = &s->pb;
109 AVIContext *avi = s->priv_data;
110 int n, au_byterate, au_ssize, au_scale, nb_frames = 0;
112 AVCodecContext* stream;
114 file_size = url_ftell(pb);
115 for(n = 0; n < s->nb_streams; n++) {
116 assert(avi->frames_hdr_strm[n]);
117 stream = s->streams[n]->codec;
118 url_fseek(pb, avi->frames_hdr_strm[n], SEEK_SET);
119 ff_parse_specific_params(stream, &au_byterate, &au_ssize, &au_scale);
121 put_le32(pb, avi->packet_count[n]);
123 put_le32(pb, avi->audio_strm_length[n] / au_ssize);
125 if(stream->codec_type == CODEC_TYPE_VIDEO)
126 nb_frames = FFMAX(nb_frames, avi->packet_count[n]);
129 assert(avi->frames_hdr_all);
130 url_fseek(pb, avi->frames_hdr_all, SEEK_SET);
131 put_le32(pb, nb_frames);
133 url_fseek(pb, file_size, SEEK_SET);
138 static int avi_write_header(AVFormatContext *s)
140 AVIContext *avi = s->priv_data;
141 ByteIOContext *pb = &s->pb;
142 int bitrate, n, i, nb_frames, au_byterate, au_ssize, au_scale;
143 AVCodecContext *stream, *video_enc;
144 offset_t list1, list2, strh, strf;
148 list1 = avi_start_new_riff(avi, pb, "AVI ", "hdrl");
152 put_le32(pb, 14 * 4);
156 for(n=0;n<s->nb_streams;n++) {
157 stream = s->streams[n]->codec;
158 bitrate += stream->bit_rate;
159 if (stream->codec_type == CODEC_TYPE_VIDEO)
166 put_le32(pb, (uint32_t)(int64_t_C(1000000) * video_enc->time_base.num / video_enc->time_base.den));
170 put_le32(pb, bitrate / 8); /* XXX: not quite exact */
171 put_le32(pb, 0); /* padding */
172 if (url_is_streamed(pb))
173 put_le32(pb, AVIF_TRUSTCKTYPE | AVIF_ISINTERLEAVED); /* flags */
175 put_le32(pb, AVIF_TRUSTCKTYPE | AVIF_HASINDEX | AVIF_ISINTERLEAVED); /* flags */
176 avi->frames_hdr_all = url_ftell(pb); /* remember this offset to fill later */
177 put_le32(pb, nb_frames); /* nb frames, filled later */
178 put_le32(pb, 0); /* initial frame */
179 put_le32(pb, s->nb_streams); /* nb streams */
180 put_le32(pb, 1024 * 1024); /* suggested buffer size */
182 put_le32(pb, video_enc->width);
183 put_le32(pb, video_enc->height);
188 put_le32(pb, 0); /* reserved */
189 put_le32(pb, 0); /* reserved */
190 put_le32(pb, 0); /* reserved */
191 put_le32(pb, 0); /* reserved */
195 list2 = start_tag(pb, "LIST");
198 stream = s->streams[i]->codec;
200 /* FourCC should really be set by the codec itself */
201 if (! stream->codec_tag) {
202 stream->codec_tag = codec_get_bmp_tag(stream->codec_id);
205 /* stream generic header */
206 strh = start_tag(pb, "strh");
207 switch(stream->codec_type) {
208 case CODEC_TYPE_VIDEO: put_tag(pb, "vids"); break;
209 case CODEC_TYPE_AUDIO: put_tag(pb, "auds"); break;
210 // case CODEC_TYPE_TEXT : put_tag(pb, "txts"); break;
211 case CODEC_TYPE_DATA : put_tag(pb, "dats"); break;
213 if(stream->codec_type == CODEC_TYPE_VIDEO)
214 put_le32(pb, stream->codec_tag);
217 put_le32(pb, 0); /* flags */
218 put_le16(pb, 0); /* priority */
219 put_le16(pb, 0); /* language */
220 put_le32(pb, 0); /* initial frame */
222 ff_parse_specific_params(stream, &au_byterate, &au_ssize, &au_scale);
224 put_le32(pb, au_scale); /* scale */
225 put_le32(pb, au_byterate); /* rate */
226 av_set_pts_info(s->streams[i], 64, au_scale, au_byterate);
228 put_le32(pb, 0); /* start */
229 avi->frames_hdr_strm[i] = url_ftell(pb); /* remember this offset to fill later */
230 if (url_is_streamed(pb))
231 put_le32(pb, AVI_MAX_RIFF_SIZE); /* FIXME: this may be broken, but who cares */
233 put_le32(pb, 0); /* length, XXX: filled later */
235 /* suggested buffer size */ //FIXME set at the end to largest chunk
236 if(stream->codec_type == CODEC_TYPE_VIDEO)
237 put_le32(pb, 1024 * 1024);
238 else if(stream->codec_type == CODEC_TYPE_AUDIO)
239 put_le32(pb, 12 * 1024);
242 put_le32(pb, -1); /* quality */
243 put_le32(pb, au_ssize); /* sample size */
245 put_le16(pb, stream->width);
246 put_le16(pb, stream->height);
249 if(stream->codec_type != CODEC_TYPE_DATA){
250 strf = start_tag(pb, "strf");
251 switch(stream->codec_type) {
252 case CODEC_TYPE_VIDEO:
253 put_bmp_header(pb, stream, codec_bmp_tags, 0);
255 case CODEC_TYPE_AUDIO:
256 if (put_wav_header(pb, stream) < 0) {
267 if (!url_is_streamed(pb)) {
268 unsigned char tag[5];
271 /* Starting to lay out AVI OpenDML master index.
272 * We want to make it JUNK entry for now, since we'd
273 * like to get away without making AVI an OpenDML one
274 * for compatibility reasons.
276 avi->indexes[i].entry = avi->indexes[i].ents_allocated = 0;
277 avi->indexes[i].indx_start = start_tag(pb, "JUNK");
278 put_le16(pb, 4); /* wLongsPerEntry */
279 put_byte(pb, 0); /* bIndexSubType (0 == frame index) */
280 put_byte(pb, 0); /* bIndexType (0 == AVI_INDEX_OF_INDEXES) */
281 put_le32(pb, 0); /* nEntriesInUse (will fill out later on) */
282 put_tag(pb, avi_stream2fourcc(&tag[0], i, stream->codec_type));
284 put_le64(pb, 0); /* dwReserved[3]
285 put_le32(pb, 0); Must be 0. */
286 for (j=0; j < AVI_MASTER_INDEX_SIZE * 2; j++)
288 end_tag(pb, avi->indexes[i].indx_start);
294 if (!url_is_streamed(pb)) {
295 /* AVI could become an OpenDML one, if it grows beyond 2Gb range */
296 avi->odml_list = start_tag(pb, "JUNK");
300 for (i = 0; i < 248; i+= 4)
302 end_tag(pb, avi->odml_list);
307 list2 = start_tag(pb, "LIST");
309 avi_write_info_tag(pb, "INAM", s->title);
310 avi_write_info_tag(pb, "IART", s->author);
311 avi_write_info_tag(pb, "ICOP", s->copyright);
312 avi_write_info_tag(pb, "ICMT", s->comment);
313 avi_write_info_tag(pb, "IPRD", s->album);
314 avi_write_info_tag(pb, "IGNR", s->genre);
317 snprintf(str_track, 4, "%d", s->track);
318 avi_write_info_tag(pb, "IPRT", str_track);
320 if(!(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT))
321 avi_write_info_tag(pb, "ISFT", LIBAVFORMAT_IDENT);
324 /* some padding for easier tag editing */
325 list2 = start_tag(pb, "JUNK");
326 for (i = 0; i < 1016; i += 4)
330 avi->movi_list = start_tag(pb, "LIST");
333 put_flush_packet(pb);
338 static int avi_write_ix(AVFormatContext *s)
340 ByteIOContext *pb = &s->pb;
341 AVIContext *avi = s->priv_data;
343 char ix_tag[] = "ix00";
346 assert(!url_is_streamed(pb));
348 if (avi->riff_id > AVI_MASTER_INDEX_SIZE)
351 for (i=0;i<s->nb_streams;i++) {
354 avi_stream2fourcc(&tag[0], i, s->streams[i]->codec->codec_type);
357 /* Writing AVI OpenDML leaf index chunk */
359 put_tag(pb, &ix_tag[0]); /* ix?? */
360 put_le32(pb, avi->indexes[i].entry * 8 + 24);
362 put_le16(pb, 2); /* wLongsPerEntry */
363 put_byte(pb, 0); /* bIndexSubType (0 == frame index) */
364 put_byte(pb, 1); /* bIndexType (1 == AVI_INDEX_OF_CHUNKS) */
365 put_le32(pb, avi->indexes[i].entry);
367 put_tag(pb, &tag[0]); /* dwChunkId */
368 put_le64(pb, avi->movi_list);/* qwBaseOffset */
369 put_le32(pb, 0); /* dwReserved_3 (must be 0) */
371 for (j=0; j<avi->indexes[i].entry; j++) {
372 AVIIentry* ie = avi_get_ientry(&avi->indexes[i], j);
373 put_le32(pb, ie->pos + 8);
374 put_le32(pb, ((uint32_t)ie->len & ~0x80000000) |
375 (ie->flags & 0x10 ? 0 : 0x80000000));
377 put_flush_packet(pb);
380 /* Updating one entry in the AVI OpenDML master index */
381 url_fseek(pb, avi->indexes[i].indx_start - 8, SEEK_SET);
382 put_tag(pb, "indx"); /* enabling this entry */
384 put_le32(pb, avi->riff_id); /* nEntriesInUse */
385 url_fskip(pb, 16*avi->riff_id);
386 put_le64(pb, ix); /* qwOffset */
387 put_le32(pb, pos - ix); /* dwSize */
388 put_le32(pb, avi->indexes[i].entry); /* dwDuration */
390 url_fseek(pb, pos, SEEK_SET);
395 static int avi_write_idx1(AVFormatContext *s)
397 ByteIOContext *pb = &s->pb;
398 AVIContext *avi = s->priv_data;
403 if (!url_is_streamed(pb)) {
404 AVIIentry* ie = 0, *tie;
405 int entry[MAX_STREAMS];
406 int empty, stream_id = -1;
408 idx_chunk = start_tag(pb, "idx1");
409 memset(&entry[0], 0, sizeof(entry));
412 for (i=0; i<s->nb_streams; i++) {
413 if (avi->indexes[i].entry <= entry[i])
416 tie = avi_get_ientry(&avi->indexes[i], entry[i]);
417 if (empty || tie->pos < ie->pos) {
424 avi_stream2fourcc(&tag[0], stream_id,
425 s->streams[stream_id]->codec->codec_type);
426 put_tag(pb, &tag[0]);
427 put_le32(pb, ie->flags);
428 put_le32(pb, ie->pos);
429 put_le32(pb, ie->len);
433 end_tag(pb, idx_chunk);
435 avi_write_counters(s, avi->riff_id);
440 static int avi_write_packet(AVFormatContext *s, AVPacket *pkt)
442 AVIContext *avi = s->priv_data;
443 ByteIOContext *pb = &s->pb;
444 unsigned char tag[5];
445 unsigned int flags=0;
446 const int stream_index= pkt->stream_index;
447 AVCodecContext *enc= s->streams[stream_index]->codec;
450 // av_log(s, AV_LOG_DEBUG, "%lld %d %d\n", pkt->dts, avi->packet_count[stream_index], stream_index);
451 while(enc->block_align==0 && pkt->dts != AV_NOPTS_VALUE && pkt->dts > avi->packet_count[stream_index]){
452 AVPacket empty_packet;
454 av_init_packet(&empty_packet);
455 empty_packet.size= 0;
456 empty_packet.data= NULL;
457 empty_packet.stream_index= stream_index;
458 avi_write_packet(s, &empty_packet);
459 // av_log(s, AV_LOG_DEBUG, "dup %lld %d\n", pkt->dts, avi->packet_count[stream_index]);
461 avi->packet_count[stream_index]++;
463 // Make sure to put an OpenDML chunk when the file size exceeds the limits
464 if (!url_is_streamed(pb) &&
465 (url_ftell(pb) - avi->riff_start > AVI_MAX_RIFF_SIZE)) {
468 end_tag(pb, avi->movi_list);
470 if (avi->riff_id == 1)
473 end_tag(pb, avi->riff_start);
474 avi->movi_list = avi_start_new_riff(avi, pb, "AVIX", "movi");
477 avi_stream2fourcc(&tag[0], stream_index, enc->codec_type);
478 if(pkt->flags&PKT_FLAG_KEY)
480 if (enc->codec_type == CODEC_TYPE_AUDIO) {
481 avi->audio_strm_length[stream_index] += size;
484 if (!url_is_streamed(&s->pb)) {
485 AVIIndex* idx = &avi->indexes[stream_index];
486 int cl = idx->entry / AVI_INDEX_CLUSTER_SIZE;
487 int id = idx->entry % AVI_INDEX_CLUSTER_SIZE;
488 if (idx->ents_allocated <= idx->entry) {
489 idx->cluster = av_realloc(idx->cluster, (cl+1)*sizeof(void*));
492 idx->cluster[cl] = av_malloc(AVI_INDEX_CLUSTER_SIZE*sizeof(AVIIentry));
493 if (!idx->cluster[cl])
495 idx->ents_allocated += AVI_INDEX_CLUSTER_SIZE;
498 idx->cluster[cl][id].flags = flags;
499 idx->cluster[cl][id].pos = url_ftell(pb) - avi->movi_list;
500 idx->cluster[cl][id].len = size;
504 put_buffer(pb, tag, 4);
506 put_buffer(pb, pkt->data, size);
510 put_flush_packet(pb);
514 static int avi_write_trailer(AVFormatContext *s)
516 AVIContext *avi = s->priv_data;
517 ByteIOContext *pb = &s->pb;
519 int i, j, n, nb_frames;
522 if (!url_is_streamed(pb))
524 if (avi->riff_id == 1) {
525 end_tag(pb, avi->movi_list);
526 res = avi_write_idx1(s);
527 end_tag(pb, avi->riff_start);
530 end_tag(pb, avi->movi_list);
531 end_tag(pb, avi->riff_start);
533 file_size = url_ftell(pb);
534 url_fseek(pb, avi->odml_list - 8, SEEK_SET);
535 put_tag(pb, "LIST"); /* Making this AVI OpenDML one */
538 for (n=nb_frames=0;n<s->nb_streams;n++) {
539 AVCodecContext *stream = s->streams[n]->codec;
540 if (stream->codec_type == CODEC_TYPE_VIDEO) {
541 if (nb_frames < avi->packet_count[n])
542 nb_frames = avi->packet_count[n];
544 if (stream->codec_id == CODEC_ID_MP2 || stream->codec_id == CODEC_ID_MP3) {
545 nb_frames += avi->packet_count[n];
549 put_le32(pb, nb_frames);
550 url_fseek(pb, file_size, SEEK_SET);
552 avi_write_counters(s, avi->riff_id);
555 put_flush_packet(pb);
557 for (i=0; i<MAX_STREAMS; i++) {
558 for (j=0; j<avi->indexes[i].ents_allocated/AVI_INDEX_CLUSTER_SIZE; j++)
559 av_free(avi->indexes[i].cluster[j]);
560 av_free(avi->indexes[i].cluster);
561 avi->indexes[i].cluster = NULL;
562 avi->indexes[i].ents_allocated = avi->indexes[i].entry = 0;
568 AVOutputFormat avi_muxer = {
580 #endif //CONFIG_AVI_MUXER