3 * Copyright (c) 2001 Fabrice Bellard.
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.
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.
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
21 #include "mpegvideo.h"
23 void *av_mallocz(int size)
26 ptr = av_malloc(size);
33 /* cannot call it directly because of 'void **' casting is not automatic */
34 void __av_freep(void **ptr)
40 /* encoder management */
41 AVCodec *first_avcodec;
43 void register_avcodec(AVCodec *format)
47 while (*p != NULL) p = &(*p)->next;
52 void avcodec_get_context_defaults(AVCodecContext *s){
53 s->bit_rate= 800*1000;
54 s->bit_rate_tolerance= s->bit_rate*10;
57 s->rc_eq= "tex^qComp";
60 s->b_quant_factor=1.25;
61 s->b_quant_offset=1.25;
62 s->i_quant_factor=-0.8;
63 s->i_quant_offset=0.0;
64 s->error_concealment= 3;
65 s->workaround_bugs= FF_BUG_AUTODETECT;
69 * allocates a AVCodecContext and set it to defaults.
70 * this can be deallocated by simply calling free()
72 AVCodecContext *avcodec_alloc_context(void){
73 AVCodecContext *avctx= av_mallocz(sizeof(AVCodecContext));
75 if(avctx==NULL) return NULL;
77 avcodec_get_context_defaults(avctx);
82 int avcodec_open(AVCodecContext *avctx, AVCodec *codec)
87 avctx->frame_number = 0;
88 if (codec->priv_data_size > 0) {
89 avctx->priv_data = av_mallocz(codec->priv_data_size);
90 if (!avctx->priv_data)
93 avctx->priv_data = NULL;
95 ret = avctx->codec->init(avctx);
97 av_freep(&avctx->priv_data);
103 int avcodec_encode_audio(AVCodecContext *avctx, UINT8 *buf, int buf_size,
104 const short *samples)
108 ret = avctx->codec->encode(avctx, buf, buf_size, (void *)samples);
109 avctx->frame_number++;
113 int avcodec_encode_video(AVCodecContext *avctx, UINT8 *buf, int buf_size,
114 const AVPicture *pict)
118 ret = avctx->codec->encode(avctx, buf, buf_size, (void *)pict);
119 avctx->frame_number++;
123 /* decode a frame. return -1 if error, otherwise return the number of
124 bytes used. If no frame could be decompressed, *got_picture_ptr is
125 zero. Otherwise, it is non zero */
126 int avcodec_decode_video(AVCodecContext *avctx, AVPicture *picture,
127 int *got_picture_ptr,
128 UINT8 *buf, int buf_size)
132 ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
134 if (*got_picture_ptr)
135 avctx->frame_number++;
139 /* decode an audio frame. return -1 if error, otherwise return the
140 *number of bytes used. If no frame could be decompressed,
141 *frame_size_ptr is zero. Otherwise, it is the decompressed frame
143 int avcodec_decode_audio(AVCodecContext *avctx, INT16 *samples,
145 UINT8 *buf, int buf_size)
149 ret = avctx->codec->decode(avctx, samples, frame_size_ptr,
151 avctx->frame_number++;
155 int avcodec_close(AVCodecContext *avctx)
157 if (avctx->codec->close)
158 avctx->codec->close(avctx);
159 av_freep(&avctx->priv_data);
164 AVCodec *avcodec_find_encoder(enum CodecID id)
169 if (p->encode != NULL && p->id == id)
176 AVCodec *avcodec_find_encoder_by_name(const char *name)
181 if (p->encode != NULL && strcmp(name,p->name) == 0)
188 AVCodec *avcodec_find_decoder(enum CodecID id)
193 if (p->decode != NULL && p->id == id)
200 AVCodec *avcodec_find_decoder_by_name(const char *name)
205 if (p->decode != NULL && strcmp(name,p->name) == 0)
212 AVCodec *avcodec_find(enum CodecID id)
224 const char *pix_fmt_str[] = {
237 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
239 const char *codec_name;
242 char channels_str[100];
246 p = avcodec_find_encoder(enc->codec_id);
248 p = avcodec_find_decoder(enc->codec_id);
251 codec_name = p->name;
252 } else if (enc->codec_name[0] != '\0') {
253 codec_name = enc->codec_name;
255 /* output avi tags */
256 if (enc->codec_type == CODEC_TYPE_VIDEO) {
257 snprintf(buf1, sizeof(buf1), "%c%c%c%c",
258 enc->codec_tag & 0xff,
259 (enc->codec_tag >> 8) & 0xff,
260 (enc->codec_tag >> 16) & 0xff,
261 (enc->codec_tag >> 24) & 0xff);
263 snprintf(buf1, sizeof(buf1), "0x%04x", enc->codec_tag);
268 switch(enc->codec_type) {
269 case CODEC_TYPE_VIDEO:
270 snprintf(buf, buf_size,
272 codec_name, enc->flags & CODEC_FLAG_HQ ? " (hq)" : "");
273 if (enc->codec_id == CODEC_ID_RAWVIDEO) {
274 snprintf(buf + strlen(buf), buf_size - strlen(buf),
276 pix_fmt_str[enc->pix_fmt]);
279 snprintf(buf + strlen(buf), buf_size - strlen(buf),
280 ", %dx%d, %0.2f fps",
281 enc->width, enc->height,
282 (float)enc->frame_rate / FRAME_RATE_BASE);
285 snprintf(buf + strlen(buf), buf_size - strlen(buf),
286 ", q=%d-%d", enc->qmin, enc->qmax);
288 bitrate = enc->bit_rate;
290 case CODEC_TYPE_AUDIO:
291 snprintf(buf, buf_size,
294 switch (enc->channels) {
296 strcpy(channels_str, "mono");
299 strcpy(channels_str, "stereo");
302 strcpy(channels_str, "5:1");
305 sprintf(channels_str, "%d channels", enc->channels);
308 if (enc->sample_rate) {
309 snprintf(buf + strlen(buf), buf_size - strlen(buf),
315 /* for PCM codecs, compute bitrate directly */
316 switch(enc->codec_id) {
317 case CODEC_ID_PCM_S16LE:
318 case CODEC_ID_PCM_S16BE:
319 case CODEC_ID_PCM_U16LE:
320 case CODEC_ID_PCM_U16BE:
321 bitrate = enc->sample_rate * enc->channels * 16;
323 case CODEC_ID_PCM_S8:
324 case CODEC_ID_PCM_U8:
325 case CODEC_ID_PCM_ALAW:
326 case CODEC_ID_PCM_MULAW:
327 bitrate = enc->sample_rate * enc->channels * 8;
330 bitrate = enc->bit_rate;
338 if (enc->flags & CODEC_FLAG_PASS1)
339 snprintf(buf + strlen(buf), buf_size - strlen(buf),
341 if (enc->flags & CODEC_FLAG_PASS2)
342 snprintf(buf + strlen(buf), buf_size - strlen(buf),
346 snprintf(buf + strlen(buf), buf_size - strlen(buf),
347 ", %d kb/s", bitrate / 1000);
351 /* Picture field are filled with 'ptr' addresses */
352 void avpicture_fill(AVPicture *picture, UINT8 *ptr,
353 int pix_fmt, int width, int height)
357 size = width * height;
359 case PIX_FMT_YUV420P:
360 picture->data[0] = ptr;
361 picture->data[1] = picture->data[0] + size;
362 picture->data[2] = picture->data[1] + size / 4;
363 picture->linesize[0] = width;
364 picture->linesize[1] = width / 2;
365 picture->linesize[2] = width / 2;
367 case PIX_FMT_YUV422P:
368 picture->data[0] = ptr;
369 picture->data[1] = picture->data[0] + size;
370 picture->data[2] = picture->data[1] + size / 2;
371 picture->linesize[0] = width;
372 picture->linesize[1] = width / 2;
373 picture->linesize[2] = width / 2;
375 case PIX_FMT_YUV444P:
376 picture->data[0] = ptr;
377 picture->data[1] = picture->data[0] + size;
378 picture->data[2] = picture->data[1] + size;
379 picture->linesize[0] = width;
380 picture->linesize[1] = width;
381 picture->linesize[2] = width;
385 picture->data[0] = ptr;
386 picture->data[1] = NULL;
387 picture->data[2] = NULL;
388 picture->linesize[0] = width * 3;
392 picture->data[0] = ptr;
393 picture->data[1] = NULL;
394 picture->data[2] = NULL;
395 picture->linesize[0] = width * 4;
398 picture->data[0] = ptr;
399 picture->data[1] = NULL;
400 picture->data[2] = NULL;
401 picture->linesize[0] = width * 2;
404 picture->data[0] = NULL;
405 picture->data[1] = NULL;
406 picture->data[2] = NULL;
411 int avpicture_get_size(int pix_fmt, int width, int height)
415 size = width * height;
417 case PIX_FMT_YUV420P:
418 size = (size * 3) / 2;
420 case PIX_FMT_YUV422P:
423 case PIX_FMT_YUV444P:
444 unsigned avcodec_version( void )
446 return LIBAVCODEC_VERSION_INT;
449 unsigned avcodec_build( void )
451 return LIBAVCODEC_BUILD;
454 /* must be called before any other functions */
455 void avcodec_init(void)
457 static int inited = 0;
466 /* this should be called after seeking and before trying to decode the next frame */
467 void avcodec_flush_buffers(AVCodecContext *avctx)
469 MpegEncContext *s = avctx->priv_data;
470 s->num_available_buffers=0;
474 static int raw_encode_init(AVCodecContext *s)
479 static int raw_decode_frame(AVCodecContext *avctx,
480 void *data, int *data_size,
481 UINT8 *buf, int buf_size)
486 static int raw_encode_frame(AVCodecContext *avctx,
487 unsigned char *frame, int buf_size, void *data)
492 AVCodec rawvideo_codec = {