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
27 #include "mpegvideo.h"
29 void *av_mallocz(unsigned int size)
33 ptr = av_malloc(size);
40 char *av_strdup(const char *s)
53 * realloc which does nothing if the block is large enough
55 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size)
60 *size= min_size + 10*1024;
62 return av_realloc(ptr, *size);
66 /* allocation of static arrays - do not use for normal allocation */
67 static unsigned int last_static = 0;
68 static char*** array_static = NULL;
69 static const unsigned int grow_static = 64; // ^2
70 void *__av_mallocz_static(void** location, unsigned int size)
72 unsigned int l = (last_static + grow_static) & ~(grow_static - 1);
73 void *ptr = av_mallocz(size);
80 array_static = av_realloc(array_static, l);
81 array_static[last_static++] = (char**) location;
86 /* free all static arrays and reset pointers to 0 */
92 for (i = 0; i < last_static; i++)
94 av_free(*array_static[i]);
95 *array_static[i] = NULL;
97 av_free(array_static);
103 /* cannot call it directly because of 'void **' casting is not automatic */
104 void __av_freep(void **ptr)
110 /* encoder management */
111 AVCodec *first_avcodec;
113 void register_avcodec(AVCodec *format)
117 while (*p != NULL) p = &(*p)->next;
122 typedef struct DefaultPicOpaque{
127 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic){
129 const int width = s->width;
130 const int height= s->height;
131 DefaultPicOpaque *opaque;
133 assert(pic->data[0]==NULL);
134 assert(pic->type==0 || pic->type==FF_TYPE_INTERNAL);
137 opaque= (DefaultPicOpaque *)pic->opaque;
139 pic->data[i]= opaque->data[i];
141 // printf("get_buffer %X coded_pic_num:%d last:%d\n", pic->opaque, pic->coded_picture_number, opaque->last_pic_num);
142 pic->age= pic->coded_picture_number - opaque->last_pic_num;
143 opaque->last_pic_num= pic->coded_picture_number;
144 //printf("age: %d %d %d\n", pic->age, c->picture_number, pic->coded_picture_number);
146 int align, h_chroma_shift, v_chroma_shift;
147 int w, h, pixel_size;
149 avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
166 if(s->codec_id==CODEC_ID_SVQ1) align=63;
169 w= (width +align)&~align;
170 h= (height+align)&~align;
172 if(!(s->flags&CODEC_FLAG_EMU_EDGE)){
177 opaque= av_mallocz(sizeof(DefaultPicOpaque));
178 if(opaque==NULL) return -1;
181 opaque->last_pic_num= -256*256*256*64;
184 int h_shift= i==0 ? 0 : h_chroma_shift;
185 int v_shift= i==0 ? 0 : v_chroma_shift;
187 pic->linesize[i]= pixel_size*w>>h_shift;
189 pic->base[i]= av_mallocz((pic->linesize[i]*h>>v_shift)+16); //FIXME 16
190 if(pic->base[i]==NULL) return -1;
192 memset(pic->base[i], 128, pic->linesize[i]*h>>v_shift);
194 if(s->flags&CODEC_FLAG_EMU_EDGE)
195 pic->data[i] = pic->base[i] + 16; //FIXME 16
197 pic->data[i] = pic->base[i] + (pic->linesize[i]*EDGE_WIDTH>>v_shift) + (EDGE_WIDTH>>h_shift) + 16; //FIXME 16
199 opaque->data[i]= pic->data[i];
201 pic->age= 256*256*256*64;
202 pic->type= FF_BUFFER_TYPE_INTERNAL;
208 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic){
211 assert(pic->type==FF_BUFFER_TYPE_INTERNAL);
215 //printf("R%X\n", pic->opaque);
218 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, enum PixelFormat * fmt){
222 void avcodec_get_context_defaults(AVCodecContext *s){
223 s->bit_rate= 800*1000;
224 s->bit_rate_tolerance= s->bit_rate*10;
229 s->rc_eq= "tex^qComp";
232 s->b_quant_factor=1.25;
233 s->b_quant_offset=1.25;
234 s->i_quant_factor=-0.8;
235 s->i_quant_offset=0.0;
236 s->error_concealment= 3;
237 s->error_resilience= 1;
238 s->workaround_bugs= FF_BUG_AUTODETECT;
239 s->frame_rate = 25 * FRAME_RATE_BASE;
241 s->me_method= ME_EPZS;
242 s->get_buffer= avcodec_default_get_buffer;
243 s->release_buffer= avcodec_default_release_buffer;
244 s->get_format= avcodec_default_get_format;
245 s->me_subpel_quality=8;
249 * allocates a AVCodecContext and set it to defaults.
250 * this can be deallocated by simply calling free()
252 AVCodecContext *avcodec_alloc_context(void){
253 AVCodecContext *avctx= av_mallocz(sizeof(AVCodecContext));
255 if(avctx==NULL) return NULL;
257 avcodec_get_context_defaults(avctx);
263 * allocates a AVPFrame and set it to defaults.
264 * this can be deallocated by simply calling free()
266 AVFrame *avcodec_alloc_frame(void){
267 AVFrame *pic= av_mallocz(sizeof(AVFrame));
272 int avcodec_open(AVCodecContext *avctx, AVCodec *codec)
276 avctx->codec = codec;
277 avctx->codec_id = codec->id;
278 avctx->frame_number = 0;
279 if (codec->priv_data_size > 0) {
280 avctx->priv_data = av_mallocz(codec->priv_data_size);
281 if (!avctx->priv_data)
284 avctx->priv_data = NULL;
286 ret = avctx->codec->init(avctx);
288 av_freep(&avctx->priv_data);
294 int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
295 const short *samples)
299 ret = avctx->codec->encode(avctx, buf, buf_size, (void *)samples);
300 avctx->frame_number++;
304 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
309 ret = avctx->codec->encode(avctx, buf, buf_size, (void *)pict);
311 emms_c(); //needed to avoid a emms_c() call before every return;
313 avctx->frame_number++;
317 /* decode a frame. return -1 if error, otherwise return the number of
318 bytes used. If no frame could be decompressed, *got_picture_ptr is
319 zero. Otherwise, it is non zero */
320 int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
321 int *got_picture_ptr,
322 uint8_t *buf, int buf_size)
326 ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
329 emms_c(); //needed to avoid a emms_c() call before every return;
331 if (*got_picture_ptr)
332 avctx->frame_number++;
336 /* decode an audio frame. return -1 if error, otherwise return the
337 *number of bytes used. If no frame could be decompressed,
338 *frame_size_ptr is zero. Otherwise, it is the decompressed frame
340 int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
342 uint8_t *buf, int buf_size)
346 ret = avctx->codec->decode(avctx, samples, frame_size_ptr,
348 avctx->frame_number++;
352 int avcodec_close(AVCodecContext *avctx)
354 if (avctx->codec->close)
355 avctx->codec->close(avctx);
356 av_freep(&avctx->priv_data);
361 AVCodec *avcodec_find_encoder(enum CodecID id)
366 if (p->encode != NULL && p->id == id)
373 AVCodec *avcodec_find_encoder_by_name(const char *name)
378 if (p->encode != NULL && strcmp(name,p->name) == 0)
385 AVCodec *avcodec_find_decoder(enum CodecID id)
390 if (p->decode != NULL && p->id == id)
397 AVCodec *avcodec_find_decoder_by_name(const char *name)
402 if (p->decode != NULL && strcmp(name,p->name) == 0)
409 AVCodec *avcodec_find(enum CodecID id)
421 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
423 const char *codec_name;
426 char channels_str[100];
430 p = avcodec_find_encoder(enc->codec_id);
432 p = avcodec_find_decoder(enc->codec_id);
435 codec_name = p->name;
436 } else if (enc->codec_name[0] != '\0') {
437 codec_name = enc->codec_name;
439 /* output avi tags */
440 if (enc->codec_type == CODEC_TYPE_VIDEO) {
441 snprintf(buf1, sizeof(buf1), "%c%c%c%c",
442 enc->codec_tag & 0xff,
443 (enc->codec_tag >> 8) & 0xff,
444 (enc->codec_tag >> 16) & 0xff,
445 (enc->codec_tag >> 24) & 0xff);
447 snprintf(buf1, sizeof(buf1), "0x%04x", enc->codec_tag);
452 switch(enc->codec_type) {
453 case CODEC_TYPE_VIDEO:
454 snprintf(buf, buf_size,
456 codec_name, enc->flags & CODEC_FLAG_HQ ? " (hq)" : "");
457 if (enc->codec_id == CODEC_ID_RAWVIDEO) {
458 snprintf(buf + strlen(buf), buf_size - strlen(buf),
460 avcodec_get_pix_fmt_name(enc->pix_fmt));
463 snprintf(buf + strlen(buf), buf_size - strlen(buf),
464 ", %dx%d, %0.2f fps",
465 enc->width, enc->height,
466 (float)enc->frame_rate / FRAME_RATE_BASE);
469 snprintf(buf + strlen(buf), buf_size - strlen(buf),
470 ", q=%d-%d", enc->qmin, enc->qmax);
472 bitrate = enc->bit_rate;
474 case CODEC_TYPE_AUDIO:
475 snprintf(buf, buf_size,
478 switch (enc->channels) {
480 strcpy(channels_str, "mono");
483 strcpy(channels_str, "stereo");
486 strcpy(channels_str, "5:1");
489 sprintf(channels_str, "%d channels", enc->channels);
492 if (enc->sample_rate) {
493 snprintf(buf + strlen(buf), buf_size - strlen(buf),
499 /* for PCM codecs, compute bitrate directly */
500 switch(enc->codec_id) {
501 case CODEC_ID_PCM_S16LE:
502 case CODEC_ID_PCM_S16BE:
503 case CODEC_ID_PCM_U16LE:
504 case CODEC_ID_PCM_U16BE:
505 bitrate = enc->sample_rate * enc->channels * 16;
507 case CODEC_ID_PCM_S8:
508 case CODEC_ID_PCM_U8:
509 case CODEC_ID_PCM_ALAW:
510 case CODEC_ID_PCM_MULAW:
511 bitrate = enc->sample_rate * enc->channels * 8;
514 bitrate = enc->bit_rate;
522 if (enc->flags & CODEC_FLAG_PASS1)
523 snprintf(buf + strlen(buf), buf_size - strlen(buf),
525 if (enc->flags & CODEC_FLAG_PASS2)
526 snprintf(buf + strlen(buf), buf_size - strlen(buf),
530 snprintf(buf + strlen(buf), buf_size - strlen(buf),
531 ", %d kb/s", bitrate / 1000);
535 unsigned avcodec_version( void )
537 return LIBAVCODEC_VERSION_INT;
540 unsigned avcodec_build( void )
542 return LIBAVCODEC_BUILD;
545 /* must be called before any other functions */
546 void avcodec_init(void)
548 static int inited = 0;
557 /* this can be called after seeking and before trying to decode the next keyframe */
558 void avcodec_flush_buffers(AVCodecContext *avctx)
561 MpegEncContext *s = avctx->priv_data;
563 switch(avctx->codec_id){
564 case CODEC_ID_MPEG1VIDEO:
568 case CODEC_ID_MJPEGB:
570 case CODEC_ID_MSMPEG4V1:
571 case CODEC_ID_MSMPEG4V2:
572 case CODEC_ID_MSMPEG4V3:
578 for(i=0; i<MAX_PICTURE_COUNT; i++){
579 if(s->picture[i].data[0] && ( s->picture[i].type == FF_BUFFER_TYPE_INTERNAL
580 || s->picture[i].type == FF_BUFFER_TYPE_USER))
581 avctx->release_buffer(avctx, (AVFrame*)&s->picture[i]);
583 s->last_picture.data[0] = s->next_picture.data[0] = NULL;
591 static int raw_encode_init(AVCodecContext *s)
596 static int raw_decode_frame(AVCodecContext *avctx,
597 void *data, int *data_size,
598 uint8_t *buf, int buf_size)
603 static int raw_encode_frame(AVCodecContext *avctx,
604 unsigned char *frame, int buf_size, void *data)
609 AVCodec rawvideo_codec = {