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(unsigned int size)
27 if(size == 0) fprintf(stderr, "Warning, allocating 0 bytes\n");
29 ptr = av_malloc(size);
36 /* allocation of static arrays - do not use for normal allocation */
37 static unsigned int last_static = 0;
38 static char*** array_static = NULL;
39 static const unsigned int grow_static = 64; // ^2
40 void *__av_mallocz_static(void** location, unsigned int size)
42 int l = (last_static + grow_static) & ~(grow_static - 1);
43 void *ptr = av_mallocz(size);
50 array_static = realloc(array_static, l);
51 array_static[last_static++] = (char**) location;
56 /* free all static arrays and reset pointers to 0 */
62 for (i = 0; i < last_static; i++)
64 free(*array_static[i]);
65 *array_static[i] = NULL;
73 /* cannot call it directly because of 'void **' casting is not automatic */
74 void __av_freep(void **ptr)
80 /* encoder management */
81 AVCodec *first_avcodec;
83 void register_avcodec(AVCodec *format)
87 while (*p != NULL) p = &(*p)->next;
92 void avcodec_get_chroma_sub_sample(int fmt, int *h_shift, int *v_shift){
102 case PIX_FMT_YUV411P:
106 case PIX_FMT_YUV422P:
118 typedef struct DefaultPicOpaque{
123 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic){
125 const int width = s->width;
126 const int height= s->height;
127 DefaultPicOpaque *opaque;
129 assert(pic->data[0]==NULL);
130 assert(pic->type==0 || pic->type==FF_TYPE_INTERNAL);
133 opaque= (DefaultPicOpaque *)pic->opaque;
135 pic->data[i]= opaque->data[i];
137 // printf("get_buffer %X coded_pic_num:%d last:%d\n", pic->opaque, pic->coded_picture_number, opaque->last_pic_num);
138 pic->age= pic->coded_picture_number - opaque->last_pic_num;
139 opaque->last_pic_num= pic->coded_picture_number;
140 //printf("age: %d %d %d\n", pic->age, c->picture_number, pic->coded_picture_number);
142 int align, h_chroma_shift, v_chroma_shift;
143 int w, h, pixel_size;
145 avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
163 if(s->codec_id==CODEC_ID_SVQ1) align=63;
166 w= (width +align)&~align;
167 h= (height+align)&~align;
169 if(!(s->flags&CODEC_FLAG_EMU_EDGE)){
174 opaque= av_mallocz(sizeof(DefaultPicOpaque));
175 if(opaque==NULL) return -1;
178 opaque->last_pic_num= -256*256*256*64;
181 int h_shift= i==0 ? 0 : h_chroma_shift;
182 int v_shift= i==0 ? 0 : v_chroma_shift;
184 pic->linesize[i]= pixel_size*w>>h_shift;
186 pic->base[i]= av_mallocz((pic->linesize[i]*h>>v_shift)+16); //FIXME 16
187 if(pic->base[i]==NULL) return -1;
189 memset(pic->base[i], 128, pic->linesize[i]*h>>v_shift);
191 if(s->flags&CODEC_FLAG_EMU_EDGE)
192 pic->data[i] = pic->base[i] + 16; //FIXME 16
194 pic->data[i] = pic->base[i] + (pic->linesize[i]*EDGE_WIDTH>>v_shift) + (EDGE_WIDTH>>h_shift) + 16; //FIXME 16
196 opaque->data[i]= pic->data[i];
198 pic->age= 256*256*256*64;
199 pic->type= FF_BUFFER_TYPE_INTERNAL;
205 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic){
208 assert(pic->type==FF_BUFFER_TYPE_INTERNAL);
212 //printf("R%X\n", pic->opaque);
215 void avcodec_get_context_defaults(AVCodecContext *s){
216 s->bit_rate= 800*1000;
217 s->bit_rate_tolerance= s->bit_rate*10;
222 s->rc_eq= "tex^qComp";
225 s->b_quant_factor=1.25;
226 s->b_quant_offset=1.25;
227 s->i_quant_factor=-0.8;
228 s->i_quant_offset=0.0;
229 s->error_concealment= 3;
230 s->error_resilience= 1;
231 s->workaround_bugs= FF_BUG_AUTODETECT;
232 s->frame_rate = 25 * FRAME_RATE_BASE;
234 s->me_method= ME_EPZS;
235 s->get_buffer= avcodec_default_get_buffer;
236 s->release_buffer= avcodec_default_release_buffer;
237 s->me_subpel_quality=8;
241 * allocates a AVCodecContext and set it to defaults.
242 * this can be deallocated by simply calling free()
244 AVCodecContext *avcodec_alloc_context(void){
245 AVCodecContext *avctx= av_mallocz(sizeof(AVCodecContext));
247 if(avctx==NULL) return NULL;
249 avcodec_get_context_defaults(avctx);
255 * allocates a AVPFrame and set it to defaults.
256 * this can be deallocated by simply calling free()
258 AVFrame *avcodec_alloc_frame(void){
259 AVFrame *pic= av_mallocz(sizeof(AVFrame));
264 int avcodec_open(AVCodecContext *avctx, AVCodec *codec)
268 avctx->codec = codec;
269 avctx->codec_id = codec->id;
270 avctx->frame_number = 0;
271 if (codec->priv_data_size > 0) {
272 avctx->priv_data = av_mallocz(codec->priv_data_size);
273 if (!avctx->priv_data)
276 avctx->priv_data = NULL;
278 ret = avctx->codec->init(avctx);
280 av_freep(&avctx->priv_data);
286 int avcodec_encode_audio(AVCodecContext *avctx, UINT8 *buf, int buf_size,
287 const short *samples)
291 ret = avctx->codec->encode(avctx, buf, buf_size, (void *)samples);
292 avctx->frame_number++;
296 int avcodec_encode_video(AVCodecContext *avctx, UINT8 *buf, int buf_size,
301 ret = avctx->codec->encode(avctx, buf, buf_size, (void *)pict);
303 emms_c(); //needed to avoid a emms_c() call before every return;
305 avctx->frame_number++;
309 /* decode a frame. return -1 if error, otherwise return the number of
310 bytes used. If no frame could be decompressed, *got_picture_ptr is
311 zero. Otherwise, it is non zero */
312 int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
313 int *got_picture_ptr,
314 UINT8 *buf, int buf_size)
318 ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
321 emms_c(); //needed to avoid a emms_c() call before every return;
323 if (*got_picture_ptr)
324 avctx->frame_number++;
328 /* decode an audio frame. return -1 if error, otherwise return the
329 *number of bytes used. If no frame could be decompressed,
330 *frame_size_ptr is zero. Otherwise, it is the decompressed frame
332 int avcodec_decode_audio(AVCodecContext *avctx, INT16 *samples,
334 UINT8 *buf, int buf_size)
338 ret = avctx->codec->decode(avctx, samples, frame_size_ptr,
340 avctx->frame_number++;
344 int avcodec_close(AVCodecContext *avctx)
346 if (avctx->codec->close)
347 avctx->codec->close(avctx);
348 av_freep(&avctx->priv_data);
353 AVCodec *avcodec_find_encoder(enum CodecID id)
358 if (p->encode != NULL && p->id == id)
365 AVCodec *avcodec_find_encoder_by_name(const char *name)
370 if (p->encode != NULL && strcmp(name,p->name) == 0)
377 AVCodec *avcodec_find_decoder(enum CodecID id)
382 if (p->decode != NULL && p->id == id)
389 AVCodec *avcodec_find_decoder_by_name(const char *name)
394 if (p->decode != NULL && strcmp(name,p->name) == 0)
401 AVCodec *avcodec_find(enum CodecID id)
413 const char *pix_fmt_str[] = {
426 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
428 const char *codec_name;
431 char channels_str[100];
435 p = avcodec_find_encoder(enc->codec_id);
437 p = avcodec_find_decoder(enc->codec_id);
440 codec_name = p->name;
441 } else if (enc->codec_name[0] != '\0') {
442 codec_name = enc->codec_name;
444 /* output avi tags */
445 if (enc->codec_type == CODEC_TYPE_VIDEO) {
446 snprintf(buf1, sizeof(buf1), "%c%c%c%c",
447 enc->codec_tag & 0xff,
448 (enc->codec_tag >> 8) & 0xff,
449 (enc->codec_tag >> 16) & 0xff,
450 (enc->codec_tag >> 24) & 0xff);
452 snprintf(buf1, sizeof(buf1), "0x%04x", enc->codec_tag);
457 switch(enc->codec_type) {
458 case CODEC_TYPE_VIDEO:
459 snprintf(buf, buf_size,
461 codec_name, enc->flags & CODEC_FLAG_HQ ? " (hq)" : "");
462 if (enc->codec_id == CODEC_ID_RAWVIDEO) {
463 snprintf(buf + strlen(buf), buf_size - strlen(buf),
465 pix_fmt_str[enc->pix_fmt]);
468 snprintf(buf + strlen(buf), buf_size - strlen(buf),
469 ", %dx%d, %0.2f fps",
470 enc->width, enc->height,
471 (float)enc->frame_rate / FRAME_RATE_BASE);
474 snprintf(buf + strlen(buf), buf_size - strlen(buf),
475 ", q=%d-%d", enc->qmin, enc->qmax);
477 bitrate = enc->bit_rate;
479 case CODEC_TYPE_AUDIO:
480 snprintf(buf, buf_size,
483 switch (enc->channels) {
485 strcpy(channels_str, "mono");
488 strcpy(channels_str, "stereo");
491 strcpy(channels_str, "5:1");
494 sprintf(channels_str, "%d channels", enc->channels);
497 if (enc->sample_rate) {
498 snprintf(buf + strlen(buf), buf_size - strlen(buf),
504 /* for PCM codecs, compute bitrate directly */
505 switch(enc->codec_id) {
506 case CODEC_ID_PCM_S16LE:
507 case CODEC_ID_PCM_S16BE:
508 case CODEC_ID_PCM_U16LE:
509 case CODEC_ID_PCM_U16BE:
510 bitrate = enc->sample_rate * enc->channels * 16;
512 case CODEC_ID_PCM_S8:
513 case CODEC_ID_PCM_U8:
514 case CODEC_ID_PCM_ALAW:
515 case CODEC_ID_PCM_MULAW:
516 bitrate = enc->sample_rate * enc->channels * 8;
519 bitrate = enc->bit_rate;
527 if (enc->flags & CODEC_FLAG_PASS1)
528 snprintf(buf + strlen(buf), buf_size - strlen(buf),
530 if (enc->flags & CODEC_FLAG_PASS2)
531 snprintf(buf + strlen(buf), buf_size - strlen(buf),
535 snprintf(buf + strlen(buf), buf_size - strlen(buf),
536 ", %d kb/s", bitrate / 1000);
540 /* Picture field are filled with 'ptr' addresses */
541 void avpicture_fill(AVPicture *picture, UINT8 *ptr,
542 int pix_fmt, int width, int height)
546 size = width * height;
548 case PIX_FMT_YUV420P:
549 picture->data[0] = ptr;
550 picture->data[1] = picture->data[0] + size;
551 picture->data[2] = picture->data[1] + size / 4;
552 picture->linesize[0] = width;
553 picture->linesize[1] = width / 2;
554 picture->linesize[2] = width / 2;
556 case PIX_FMT_YUV422P:
557 picture->data[0] = ptr;
558 picture->data[1] = picture->data[0] + size;
559 picture->data[2] = picture->data[1] + size / 2;
560 picture->linesize[0] = width;
561 picture->linesize[1] = width / 2;
562 picture->linesize[2] = width / 2;
564 case PIX_FMT_YUV444P:
565 picture->data[0] = ptr;
566 picture->data[1] = picture->data[0] + size;
567 picture->data[2] = picture->data[1] + size;
568 picture->linesize[0] = width;
569 picture->linesize[1] = width;
570 picture->linesize[2] = width;
574 picture->data[0] = ptr;
575 picture->data[1] = NULL;
576 picture->data[2] = NULL;
577 picture->linesize[0] = width * 3;
581 picture->data[0] = ptr;
582 picture->data[1] = NULL;
583 picture->data[2] = NULL;
584 picture->linesize[0] = width * 4;
587 picture->data[0] = ptr;
588 picture->data[1] = NULL;
589 picture->data[2] = NULL;
590 picture->linesize[0] = width * 2;
593 picture->data[0] = NULL;
594 picture->data[1] = NULL;
595 picture->data[2] = NULL;
600 int avpicture_get_size(int pix_fmt, int width, int height)
604 size = width * height;
606 case PIX_FMT_YUV420P:
607 size = (size * 3) / 2;
609 case PIX_FMT_YUV422P:
612 case PIX_FMT_YUV444P:
633 unsigned avcodec_version( void )
635 return LIBAVCODEC_VERSION_INT;
638 unsigned avcodec_build( void )
640 return LIBAVCODEC_BUILD;
643 /* must be called before any other functions */
644 void avcodec_init(void)
646 static int inited = 0;
655 /* this can be called after seeking and before trying to decode the next keyframe */
656 void avcodec_flush_buffers(AVCodecContext *avctx)
659 MpegEncContext *s = avctx->priv_data;
661 switch(avctx->codec_id){
662 case CODEC_ID_MPEG1VIDEO:
666 case CODEC_ID_MJPEGB:
668 case CODEC_ID_MSMPEG4V1:
669 case CODEC_ID_MSMPEG4V2:
670 case CODEC_ID_MSMPEG4V3:
676 for(i=0; i<MAX_PICTURE_COUNT; i++){
677 if(s->picture[i].data[0] && ( s->picture[i].type == FF_BUFFER_TYPE_INTERNAL
678 || s->picture[i].type == FF_BUFFER_TYPE_USER))
679 avctx->release_buffer(avctx, (AVFrame*)&s->picture[i]);
688 static int raw_encode_init(AVCodecContext *s)
693 static int raw_decode_frame(AVCodecContext *avctx,
694 void *data, int *data_size,
695 UINT8 *buf, int buf_size)
700 static int raw_encode_frame(AVCodecContext *avctx,
701 unsigned char *frame, int buf_size, void *data)
706 AVCodec rawvideo_codec = {