3 * Copyright (c) 2000 Gerard Lantau.
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 * - fill all fields if non streamed (nb_frames for example)
27 typedef struct AVIIndex {
29 unsigned int flags, pos, len;
30 struct AVIIndex *next;
34 offset_t movi_list, frames_hdr_all, frames_hdr_strm[MAX_STREAMS];
35 int audio_strm_length[MAX_STREAMS];
36 AVIIndex *first, *last;
39 offset_t start_tag(ByteIOContext *pb, char *tag)
46 void end_tag(ByteIOContext *pb, offset_t start)
51 url_fseek(pb, start - 4, SEEK_SET);
52 put_le32(pb, (UINT32)(pos - start));
53 url_fseek(pb, pos, SEEK_SET);
56 /* Note: when encoding, the first matching tag is used, so order is
57 important if multiple tags possible for a given codec. */
58 CodecTag codec_bmp_tags[] = {
59 { CODEC_ID_H263, MKTAG('U', '2', '6', '3') },
60 { CODEC_ID_H263P, MKTAG('U', '2', '6', '3') },
61 { CODEC_ID_H263I, MKTAG('I', '2', '6', '3') }, /* intel h263 */
62 { CODEC_ID_MJPEG, MKTAG('M', 'J', 'P', 'G') },
63 { CODEC_ID_MPEG4, MKTAG('D', 'I', 'V', 'X') },
64 { CODEC_ID_MPEG4, MKTAG('d', 'i', 'v', 'x') },
65 { CODEC_ID_MPEG4, MKTAG(0x04, 0, 0, 0) }, /* some broken avi use this */
66 { CODEC_ID_MSMPEG4, MKTAG('D', 'I', 'V', '3') }, /* default signature when using MSMPEG4 */
67 { CODEC_ID_MSMPEG4, MKTAG('M', 'P', '4', '3') },
71 unsigned int codec_get_tag(CodecTag *tags, int id)
73 while (tags->id != 0) {
81 int codec_get_id(CodecTag *tags, unsigned int tag)
83 while (tags->id != 0) {
91 unsigned int codec_get_bmp_tag(int id)
93 return codec_get_tag(codec_bmp_tags, id);
96 /* BITMAPINFOHEADER header */
97 void put_bmp_header(ByteIOContext *pb, AVCodecContext *enc)
99 put_le32(pb, 40); /* size */
100 put_le32(pb, enc->width);
101 put_le32(pb, enc->height);
102 put_le16(pb, 1); /* planes */
103 put_le16(pb, 24); /* depth */
104 /* compression type */
105 put_le32(pb, codec_get_bmp_tag(enc->codec_id));
106 put_le32(pb, enc->width * enc->height * 3);
113 void parse_specific_params(AVCodecContext *stream, int *au_byterate, int *au_ssize, int *au_scale)
115 switch(stream->codec_id) {
116 case CODEC_ID_PCM_S16LE:
117 *au_scale = *au_ssize = 2*stream->channels;
118 *au_byterate = *au_ssize * stream->sample_rate;
120 case CODEC_ID_PCM_U8:
121 case CODEC_ID_PCM_ALAW:
122 case CODEC_ID_PCM_MULAW:
123 *au_scale = *au_ssize = stream->channels;
124 *au_byterate = *au_ssize * stream->sample_rate;
129 *au_byterate = stream->bit_rate / 8;
130 case CODEC_ID_MP3LAME:
133 *au_byterate = stream->bit_rate / 8;
137 *au_byterate = stream->bit_rate / 8;
142 static int avi_write_header(AVFormatContext *s)
145 ByteIOContext *pb = &s->pb;
146 int bitrate, n, i, nb_frames, au_byterate, au_ssize, au_scale;
147 AVCodecContext *stream, *video_enc;
148 offset_t list1, list2, strh, strf;
150 avi = malloc(sizeof(AVIContext));
153 memset(avi, 0, sizeof(AVIContext));
157 put_le32(pb, 0); /* file length */
161 list1 = start_tag(pb, "LIST");
166 put_le32(pb, 14 * 4);
170 for(n=0;n<s->nb_streams;n++) {
171 stream = &s->streams[n]->codec;
172 bitrate += stream->bit_rate;
173 if (stream->codec_type == CODEC_TYPE_VIDEO)
183 put_le32(pb, (UINT32)(INT64_C(1000000) * FRAME_RATE_BASE / video_enc->frame_rate));
184 put_le32(pb, bitrate / 8); /* XXX: not quite exact */
185 put_le32(pb, 0); /* padding */
186 put_le32(pb, AVIF_TRUSTCKTYPE | AVIF_HASINDEX | AVIF_ISINTERLEAVED); /* flags */
187 avi->frames_hdr_all = url_ftell(pb); /* remember this offset to fill later */
188 put_le32(pb, nb_frames); /* nb frames, filled later */
189 put_le32(pb, 0); /* initial frame */
190 put_le32(pb, s->nb_streams); /* nb streams */
191 put_le32(pb, 1024 * 1024); /* suggested buffer size */
192 put_le32(pb, video_enc->width);
193 put_le32(pb, video_enc->height);
194 put_le32(pb, 0); /* reserved */
195 put_le32(pb, 0); /* reserved */
196 put_le32(pb, 0); /* reserved */
197 put_le32(pb, 0); /* reserved */
201 list2 = start_tag(pb, "LIST");
204 stream = &s->streams[i]->codec;
206 /* stream generic header */
207 strh = start_tag(pb, "strh");
208 switch(stream->codec_type) {
209 case CODEC_TYPE_VIDEO:
211 put_le32(pb, codec_get_bmp_tag(stream->codec_id));
212 put_le32(pb, 0); /* flags */
213 put_le16(pb, 0); /* priority */
214 put_le16(pb, 0); /* language */
215 put_le32(pb, 0); /* initial frame */
216 put_le32(pb, 1000); /* scale */
217 put_le32(pb, (1000 * stream->frame_rate) / FRAME_RATE_BASE); /* rate */
218 put_le32(pb, 0); /* start */
219 avi->frames_hdr_strm[i] = url_ftell(pb); /* remember this offset to fill later */
220 put_le32(pb, nb_frames); /* length, XXX: fill later */
221 put_le32(pb, 1024 * 1024); /* suggested buffer size */
222 put_le32(pb, -1); /* quality */
223 put_le32(pb, stream->width * stream->height * 3); /* sample size */
226 put_le16(pb, stream->width);
227 put_le16(pb, stream->height);
229 case CODEC_TYPE_AUDIO:
231 put_le32(pb, 1); /* tag */
232 put_le32(pb, 0); /* flags */
233 put_le16(pb, 0); /* priority */
234 put_le16(pb, 0); /* language */
235 put_le32(pb, 0); /* initial frame */
236 parse_specific_params(stream, &au_byterate, &au_ssize, &au_scale);
237 put_le32(pb, au_scale); /* scale */
238 put_le32(pb, au_byterate); /* rate */
239 put_le32(pb, 0); /* start */
240 avi->frames_hdr_strm[i] = url_ftell(pb); /* remember this offset to fill later */
241 put_le32(pb, 0); /* length, XXX: filled later */
242 put_le32(pb, 12 * 1024); /* suggested buffer size */
243 put_le32(pb, -1); /* quality */
244 put_le32(pb, au_ssize); /* sample size */
251 strf = start_tag(pb, "strf");
252 switch(stream->codec_type) {
253 case CODEC_TYPE_VIDEO:
254 put_bmp_header(pb, stream);
256 case CODEC_TYPE_AUDIO:
257 if (put_wav_header(pb, stream) < 0) {
269 avi->movi_list = start_tag(pb, "LIST");
274 put_flush_packet(pb);
279 static int avi_write_packet(AVFormatContext *s, int stream_index,
280 UINT8 *buf, int size, int force_pts)
282 AVIContext *avi = s->priv_data;
283 ByteIOContext *pb = &s->pb;
285 unsigned char tag[5];
289 enc = &s->streams[stream_index]->codec;
292 tag[1] = '0' + stream_index;
293 if (enc->codec_type == CODEC_TYPE_VIDEO) {
296 flags = enc->key_frame ? 0x10 : 0x00;
302 if (enc->codec_type == CODEC_TYPE_AUDIO)
303 avi->audio_strm_length[stream_index] += size;
305 if (!url_is_streamed(&s->pb)) {
306 idx = malloc(sizeof(AVIIndex));
307 memcpy(idx->tag, tag, 4);
309 idx->pos = url_ftell(pb) - avi->movi_list;
315 avi->last->next = idx;
319 put_buffer(pb, tag, 4);
321 put_buffer(pb, buf, size);
325 put_flush_packet(pb);
329 static int avi_write_trailer(AVFormatContext *s)
331 ByteIOContext *pb = &s->pb;
332 AVIContext *avi = s->priv_data;
333 offset_t file_size, idx_chunk;
334 int n, nb_frames, au_byterate, au_ssize, au_scale;
335 AVCodecContext *stream;
338 if (!url_is_streamed(&s->pb)) {
339 end_tag(pb, avi->movi_list);
341 idx_chunk = start_tag(pb, "idx1");
343 while (idx != NULL) {
344 put_buffer(pb, idx->tag, 4);
345 put_le32(pb, idx->flags);
346 put_le32(pb, idx->pos);
347 put_le32(pb, idx->len);
350 end_tag(pb, idx_chunk);
352 /* update file size */
353 file_size = url_ftell(pb);
354 url_fseek(pb, 4, SEEK_SET);
355 put_le32(pb, (UINT32)(file_size - 8));
357 /* Fill in frame/sample counters */
359 for(n=0;n<s->nb_streams;n++) {
360 if (avi->frames_hdr_strm[n] != 0) {
361 stream = &s->streams[n]->codec;
362 url_fseek(pb, avi->frames_hdr_strm[n], SEEK_SET);
363 if (stream->codec_type == CODEC_TYPE_VIDEO) {
364 put_le32(pb, stream->frame_number);
365 if (nb_frames < stream->frame_number)
366 nb_frames = stream->frame_number;
368 if (stream->codec_id == CODEC_ID_MP2 || stream->codec_id == CODEC_ID_MP3LAME) {
369 put_le32(pb, stream->frame_number);
370 nb_frames += stream->frame_number;
372 parse_specific_params(stream, &au_byterate, &au_ssize, &au_scale);
373 put_le32(pb, avi->audio_strm_length[n] / au_ssize);
378 if (avi->frames_hdr_all != 0) {
379 url_fseek(pb, avi->frames_hdr_all, SEEK_SET);
380 put_le32(pb, nb_frames);
382 url_fseek(pb, file_size, SEEK_SET);
384 put_flush_packet(pb);
390 AVFormat avi_format = {