wmv1
[libav.git] / libav / avienc.c
1 /*
2 * AVI encoder.
3 * Copyright (c) 2000 Fabrice Bellard.
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This library 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 GNU
13 * Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 */
19 #include "avformat.h"
20 #include "avi.h"
21
22 /*
23 * TODO:
24 * - fill all fields if non streamed (nb_frames for example)
25 */
26
27 typedef struct AVIIndex {
28 unsigned char tag[4];
29 unsigned int flags, pos, len;
30 struct AVIIndex *next;
31 } AVIIndex;
32
33 typedef struct {
34 offset_t movi_list, frames_hdr_all, frames_hdr_strm[MAX_STREAMS];
35 int audio_strm_length[MAX_STREAMS];
36 AVIIndex *first, *last;
37 } AVIContext;
38
39 offset_t start_tag(ByteIOContext *pb, char *tag)
40 {
41 put_tag(pb, tag);
42 put_le32(pb, 0);
43 return url_ftell(pb);
44 }
45
46 void end_tag(ByteIOContext *pb, offset_t start)
47 {
48 offset_t pos;
49
50 pos = url_ftell(pb);
51 url_fseek(pb, start - 4, SEEK_SET);
52 put_le32(pb, (UINT32)(pos - start));
53 url_fseek(pb, pos, SEEK_SET);
54 }
55
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('H', '2', '6', '3') },
60 { CODEC_ID_H263P, MKTAG('H', '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_MSMPEG4V3, MKTAG('D', 'I', 'V', '3') }, /* default signature when using MSMPEG4 */
67 { CODEC_ID_MSMPEG4V3, MKTAG('M', 'P', '4', '3') },
68 { CODEC_ID_MSMPEG4V2, MKTAG('M', 'P', '4', '2') },
69 { CODEC_ID_MSMPEG4V1, MKTAG('M', 'P', 'G', '4') },
70 { CODEC_ID_WMV1, MKTAG('W', 'M', 'V', '1') },
71 { 0, 0 },
72 };
73
74 unsigned int codec_get_tag(const CodecTag *tags, int id)
75 {
76 while (tags->id != 0) {
77 if (tags->id == id)
78 return tags->tag;
79 tags++;
80 }
81 return 0;
82 }
83
84 int codec_get_id(const CodecTag *tags, unsigned int tag)
85 {
86 while (tags->id != 0) {
87 if (tags->tag == tag)
88 return tags->id;
89 tags++;
90 }
91 return 0;
92 }
93
94 unsigned int codec_get_bmp_tag(int id)
95 {
96 return codec_get_tag(codec_bmp_tags, id);
97 }
98
99 /* BITMAPINFOHEADER header */
100 void put_bmp_header(ByteIOContext *pb, AVCodecContext *enc, CodecTag *tags)
101 {
102 put_le32(pb, 40); /* size */
103 put_le32(pb, enc->width);
104 put_le32(pb, enc->height);
105 put_le16(pb, 1); /* planes */
106 put_le16(pb, 24); /* depth */
107 /* compression type */
108 put_le32(pb, codec_get_tag(tags, enc->codec_id));
109 put_le32(pb, enc->width * enc->height * 3);
110 put_le32(pb, 0);
111 put_le32(pb, 0);
112 put_le32(pb, 0);
113 put_le32(pb, 0);
114 }
115
116 void parse_specific_params(AVCodecContext *stream, int *au_byterate, int *au_ssize, int *au_scale)
117 {
118 switch(stream->codec_id) {
119 case CODEC_ID_PCM_S16LE:
120 *au_scale = *au_ssize = 2*stream->channels;
121 *au_byterate = *au_ssize * stream->sample_rate;
122 break;
123 case CODEC_ID_PCM_U8:
124 case CODEC_ID_PCM_ALAW:
125 case CODEC_ID_PCM_MULAW:
126 *au_scale = *au_ssize = stream->channels;
127 *au_byterate = *au_ssize * stream->sample_rate;
128 break;
129 case CODEC_ID_MP2:
130 *au_ssize = 1;
131 *au_scale = 1;
132 *au_byterate = stream->bit_rate / 8;
133 case CODEC_ID_MP3LAME:
134 *au_ssize = 1;
135 *au_scale = 1;
136 *au_byterate = stream->bit_rate / 8;
137 default:
138 *au_ssize = 1;
139 *au_scale = 1;
140 *au_byterate = stream->bit_rate / 8;
141 break;
142 }
143 }
144
145 static int avi_write_header(AVFormatContext *s)
146 {
147 AVIContext *avi = s->priv_data;
148 ByteIOContext *pb = &s->pb;
149 int bitrate, n, i, nb_frames, au_byterate, au_ssize, au_scale;
150 AVCodecContext *stream, *video_enc;
151 offset_t list1, list2, strh, strf;
152
153 put_tag(pb, "RIFF");
154 put_le32(pb, 0); /* file length */
155 put_tag(pb, "AVI ");
156
157 /* header list */
158 list1 = start_tag(pb, "LIST");
159 put_tag(pb, "hdrl");
160
161 /* avi header */
162 put_tag(pb, "avih");
163 put_le32(pb, 14 * 4);
164 bitrate = 0;
165
166 video_enc = NULL;
167 for(n=0;n<s->nb_streams;n++) {
168 stream = &s->streams[n]->codec;
169 bitrate += stream->bit_rate;
170 if (stream->codec_type == CODEC_TYPE_VIDEO)
171 video_enc = stream;
172 }
173
174 if (!video_enc) {
175 av_free(avi);
176 return -1;
177 }
178 nb_frames = 0;
179
180 put_le32(pb, (UINT32)(INT64_C(1000000) * FRAME_RATE_BASE / video_enc->frame_rate));
181 put_le32(pb, bitrate / 8); /* XXX: not quite exact */
182 put_le32(pb, 0); /* padding */
183 put_le32(pb, AVIF_TRUSTCKTYPE | AVIF_HASINDEX | AVIF_ISINTERLEAVED); /* flags */
184 avi->frames_hdr_all = url_ftell(pb); /* remember this offset to fill later */
185 put_le32(pb, nb_frames); /* nb frames, filled later */
186 put_le32(pb, 0); /* initial frame */
187 put_le32(pb, s->nb_streams); /* nb streams */
188 put_le32(pb, 1024 * 1024); /* suggested buffer size */
189 put_le32(pb, video_enc->width);
190 put_le32(pb, video_enc->height);
191 put_le32(pb, 0); /* reserved */
192 put_le32(pb, 0); /* reserved */
193 put_le32(pb, 0); /* reserved */
194 put_le32(pb, 0); /* reserved */
195
196 /* stream list */
197 for(i=0;i<n;i++) {
198 list2 = start_tag(pb, "LIST");
199 put_tag(pb, "strl");
200
201 stream = &s->streams[i]->codec;
202
203 /* stream generic header */
204 strh = start_tag(pb, "strh");
205 switch(stream->codec_type) {
206 case CODEC_TYPE_VIDEO:
207 put_tag(pb, "vids");
208 put_le32(pb, codec_get_bmp_tag(stream->codec_id));
209 put_le32(pb, 0); /* flags */
210 put_le16(pb, 0); /* priority */
211 put_le16(pb, 0); /* language */
212 put_le32(pb, 0); /* initial frame */
213 put_le32(pb, 1000); /* scale */
214 put_le32(pb, (1000 * stream->frame_rate) / FRAME_RATE_BASE); /* rate */
215 put_le32(pb, 0); /* start */
216 avi->frames_hdr_strm[i] = url_ftell(pb); /* remember this offset to fill later */
217 put_le32(pb, nb_frames); /* length, XXX: fill later */
218 put_le32(pb, 1024 * 1024); /* suggested buffer size */
219 put_le32(pb, -1); /* quality */
220 put_le32(pb, stream->width * stream->height * 3); /* sample size */
221 put_le16(pb, 0);
222 put_le16(pb, 0);
223 put_le16(pb, stream->width);
224 put_le16(pb, stream->height);
225 break;
226 case CODEC_TYPE_AUDIO:
227 put_tag(pb, "auds");
228 put_le32(pb, 1); /* tag */
229 put_le32(pb, 0); /* flags */
230 put_le16(pb, 0); /* priority */
231 put_le16(pb, 0); /* language */
232 put_le32(pb, 0); /* initial frame */
233 parse_specific_params(stream, &au_byterate, &au_ssize, &au_scale);
234 put_le32(pb, au_scale); /* scale */
235 put_le32(pb, au_byterate); /* rate */
236 put_le32(pb, 0); /* start */
237 avi->frames_hdr_strm[i] = url_ftell(pb); /* remember this offset to fill later */
238 put_le32(pb, 0); /* length, XXX: filled later */
239 put_le32(pb, 12 * 1024); /* suggested buffer size */
240 put_le32(pb, -1); /* quality */
241 put_le32(pb, au_ssize); /* sample size */
242 put_le32(pb, 0);
243 put_le32(pb, 0);
244 break;
245 default:
246 abort();
247 }
248 end_tag(pb, strh);
249
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);
254 break;
255 case CODEC_TYPE_AUDIO:
256 if (put_wav_header(pb, stream) < 0) {
257 av_free(avi);
258 return -1;
259 }
260 break;
261 default:
262 abort();
263 }
264 end_tag(pb, strf);
265 end_tag(pb, list2);
266 }
267
268 end_tag(pb, list1);
269
270 avi->movi_list = start_tag(pb, "LIST");
271 avi->first = NULL;
272 avi->last = NULL;
273 put_tag(pb, "movi");
274
275 put_flush_packet(pb);
276
277 return 0;
278 }
279
280 static int avi_write_packet(AVFormatContext *s, int stream_index,
281 UINT8 *buf, int size, int force_pts)
282 {
283 AVIContext *avi = s->priv_data;
284 ByteIOContext *pb = &s->pb;
285 AVIIndex *idx;
286 unsigned char tag[5];
287 unsigned int flags;
288 AVCodecContext *enc;
289
290 enc = &s->streams[stream_index]->codec;
291
292 tag[0] = '0';
293 tag[1] = '0' + stream_index;
294 if (enc->codec_type == CODEC_TYPE_VIDEO) {
295 tag[2] = 'd';
296 tag[3] = 'c';
297 flags = enc->key_frame ? 0x10 : 0x00;
298 } else {
299 tag[2] = 'w';
300 tag[3] = 'b';
301 flags = 0x10;
302 }
303 if (enc->codec_type == CODEC_TYPE_AUDIO)
304 avi->audio_strm_length[stream_index] += size;
305
306 if (!url_is_streamed(&s->pb)) {
307 idx = av_malloc(sizeof(AVIIndex));
308 memcpy(idx->tag, tag, 4);
309 idx->flags = flags;
310 idx->pos = url_ftell(pb) - avi->movi_list;
311 idx->len = size;
312 idx->next = NULL;
313 if (!avi->last)
314 avi->first = idx;
315 else
316 avi->last->next = idx;
317 avi->last = idx;
318 }
319
320 put_buffer(pb, tag, 4);
321 put_le32(pb, size);
322 put_buffer(pb, buf, size);
323 if (size & 1)
324 put_byte(pb, 0);
325
326 put_flush_packet(pb);
327 return 0;
328 }
329
330 static int avi_write_trailer(AVFormatContext *s)
331 {
332 ByteIOContext *pb = &s->pb;
333 AVIContext *avi = s->priv_data;
334 offset_t file_size, idx_chunk;
335 int n, nb_frames, au_byterate, au_ssize, au_scale;
336 AVCodecContext *stream;
337 AVIIndex *idx;
338
339 if (!url_is_streamed(&s->pb)) {
340 end_tag(pb, avi->movi_list);
341
342 idx_chunk = start_tag(pb, "idx1");
343 idx = avi->first;
344 while (idx != NULL) {
345 put_buffer(pb, idx->tag, 4);
346 put_le32(pb, idx->flags);
347 put_le32(pb, idx->pos);
348 put_le32(pb, idx->len);
349 idx = idx->next;
350 }
351 end_tag(pb, idx_chunk);
352
353 /* update file size */
354 file_size = url_ftell(pb);
355 url_fseek(pb, 4, SEEK_SET);
356 put_le32(pb, (UINT32)(file_size - 8));
357
358 /* Fill in frame/sample counters */
359 nb_frames = 0;
360 for(n=0;n<s->nb_streams;n++) {
361 if (avi->frames_hdr_strm[n] != 0) {
362 stream = &s->streams[n]->codec;
363 url_fseek(pb, avi->frames_hdr_strm[n], SEEK_SET);
364 if (stream->codec_type == CODEC_TYPE_VIDEO) {
365 put_le32(pb, stream->frame_number);
366 if (nb_frames < stream->frame_number)
367 nb_frames = stream->frame_number;
368 } else {
369 if (stream->codec_id == CODEC_ID_MP2 || stream->codec_id == CODEC_ID_MP3LAME) {
370 put_le32(pb, stream->frame_number);
371 nb_frames += stream->frame_number;
372 } else {
373 parse_specific_params(stream, &au_byterate, &au_ssize, &au_scale);
374 put_le32(pb, avi->audio_strm_length[n] / au_ssize);
375 }
376 }
377 }
378 }
379 if (avi->frames_hdr_all != 0) {
380 url_fseek(pb, avi->frames_hdr_all, SEEK_SET);
381 put_le32(pb, nb_frames);
382 }
383 url_fseek(pb, file_size, SEEK_SET);
384 }
385 put_flush_packet(pb);
386 return 0;
387 }
388
389 static AVOutputFormat avi_oformat = {
390 "avi",
391 "avi format",
392 "video/x-msvideo",
393 "avi",
394 sizeof(AVIContext),
395 CODEC_ID_MP2,
396 CODEC_ID_MSMPEG4,
397 avi_write_header,
398 avi_write_packet,
399 avi_write_trailer,
400 };
401
402 int avienc_init(void)
403 {
404 av_register_output_format(&avi_oformat);
405 return 0;
406 }