3 * Copyright (c) 2001 Fabrice Bellard
4 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
6 * This file is part of FFmpeg.
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 * @file libavcodec/utils.c
28 /* needed for mkstemp() */
29 #define _XOPEN_SOURCE 600
31 #include "libavutil/avstring.h"
32 #include "libavutil/integer.h"
33 #include "libavutil/crc.h"
37 #include "imgconvert.h"
38 #include "audioconvert.h"
48 const uint8_t ff_reverse[256]={
49 0x00,0x80,0x40,0xC0,0x20,0xA0,0x60,0xE0,0x10,0x90,0x50,0xD0,0x30,0xB0,0x70,0xF0,
50 0x08,0x88,0x48,0xC8,0x28,0xA8,0x68,0xE8,0x18,0x98,0x58,0xD8,0x38,0xB8,0x78,0xF8,
51 0x04,0x84,0x44,0xC4,0x24,0xA4,0x64,0xE4,0x14,0x94,0x54,0xD4,0x34,0xB4,0x74,0xF4,
52 0x0C,0x8C,0x4C,0xCC,0x2C,0xAC,0x6C,0xEC,0x1C,0x9C,0x5C,0xDC,0x3C,0xBC,0x7C,0xFC,
53 0x02,0x82,0x42,0xC2,0x22,0xA2,0x62,0xE2,0x12,0x92,0x52,0xD2,0x32,0xB2,0x72,0xF2,
54 0x0A,0x8A,0x4A,0xCA,0x2A,0xAA,0x6A,0xEA,0x1A,0x9A,0x5A,0xDA,0x3A,0xBA,0x7A,0xFA,
55 0x06,0x86,0x46,0xC6,0x26,0xA6,0x66,0xE6,0x16,0x96,0x56,0xD6,0x36,0xB6,0x76,0xF6,
56 0x0E,0x8E,0x4E,0xCE,0x2E,0xAE,0x6E,0xEE,0x1E,0x9E,0x5E,0xDE,0x3E,0xBE,0x7E,0xFE,
57 0x01,0x81,0x41,0xC1,0x21,0xA1,0x61,0xE1,0x11,0x91,0x51,0xD1,0x31,0xB1,0x71,0xF1,
58 0x09,0x89,0x49,0xC9,0x29,0xA9,0x69,0xE9,0x19,0x99,0x59,0xD9,0x39,0xB9,0x79,0xF9,
59 0x05,0x85,0x45,0xC5,0x25,0xA5,0x65,0xE5,0x15,0x95,0x55,0xD5,0x35,0xB5,0x75,0xF5,
60 0x0D,0x8D,0x4D,0xCD,0x2D,0xAD,0x6D,0xED,0x1D,0x9D,0x5D,0xDD,0x3D,0xBD,0x7D,0xFD,
61 0x03,0x83,0x43,0xC3,0x23,0xA3,0x63,0xE3,0x13,0x93,0x53,0xD3,0x33,0xB3,0x73,0xF3,
62 0x0B,0x8B,0x4B,0xCB,0x2B,0xAB,0x6B,0xEB,0x1B,0x9B,0x5B,0xDB,0x3B,0xBB,0x7B,0xFB,
63 0x07,0x87,0x47,0xC7,0x27,0xA7,0x67,0xE7,0x17,0x97,0x57,0xD7,0x37,0xB7,0x77,0xF7,
64 0x0F,0x8F,0x4F,0xCF,0x2F,0xAF,0x6F,0xEF,0x1F,0x9F,0x5F,0xDF,0x3F,0xBF,0x7F,0xFF,
67 static int volatile entangled_thread_counter=0;
69 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size)
74 *size= FFMAX(17*min_size/16 + 32, min_size);
76 ptr= av_realloc(ptr, *size);
77 if(!ptr) //we could set this to the unmodified min_size but this is safer if the user lost the ptr and uses NULL now
83 void av_fast_malloc(void *ptr, unsigned int *size, unsigned int min_size)
88 *size= FFMAX(17*min_size/16 + 32, min_size);
90 *p = av_malloc(*size);
94 /* encoder management */
95 static AVCodec *first_avcodec = NULL;
97 AVCodec *av_codec_next(AVCodec *c){
99 else return first_avcodec;
102 void avcodec_register(AVCodec *codec)
107 while (*p != NULL) p = &(*p)->next;
112 #if LIBAVCODEC_VERSION_MAJOR < 53
113 void register_avcodec(AVCodec *codec)
115 avcodec_register(codec);
119 void avcodec_set_dimensions(AVCodecContext *s, int width, int height){
120 s->coded_width = width;
121 s->coded_height= height;
122 s->width = -((-width )>>s->lowres);
123 s->height= -((-height)>>s->lowres);
126 typedef struct InternalBuffer{
132 enum PixelFormat pix_fmt;
135 #define INTERNAL_BUFFER_SIZE 32
137 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height){
142 case PIX_FMT_YUV420P:
143 case PIX_FMT_YUYV422:
144 case PIX_FMT_UYVY422:
145 case PIX_FMT_YUV422P:
146 case PIX_FMT_YUV444P:
148 case PIX_FMT_GRAY16BE:
149 case PIX_FMT_GRAY16LE:
150 case PIX_FMT_YUVJ420P:
151 case PIX_FMT_YUVJ422P:
152 case PIX_FMT_YUVJ444P:
153 case PIX_FMT_YUVA420P:
154 w_align= 16; //FIXME check for non mpeg style codecs and use less alignment
156 if(s->codec_id == CODEC_ID_MPEG2VIDEO)
157 h_align= 32; // interlaced is rounded up to 2 MBs
159 case PIX_FMT_YUV411P:
160 case PIX_FMT_UYYVYY411:
164 case PIX_FMT_YUV410P:
165 if(s->codec_id == CODEC_ID_SVQ1){
170 if(s->codec_id == CODEC_ID_RPZA){
177 if(s->codec_id == CODEC_ID_SMC){
183 if((s->codec_id == CODEC_ID_MSZH) || (s->codec_id == CODEC_ID_ZLIB)){
194 *width = FFALIGN(*width , w_align);
195 *height= FFALIGN(*height, h_align);
196 if(s->codec_id == CODEC_ID_H264)
197 *height+=2; // some of the optimized chroma MC reads one line too much
200 int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h){
201 if((int)w>0 && (int)h>0 && (w+128)*(uint64_t)(h+128) < INT_MAX/8)
204 av_log(av_log_ctx, AV_LOG_ERROR, "picture size invalid (%ux%u)\n", w, h);
208 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic){
215 if(pic->data[0]!=NULL) {
216 av_log(s, AV_LOG_ERROR, "pic->data[0]!=NULL in avcodec_default_get_buffer\n");
219 if(s->internal_buffer_count >= INTERNAL_BUFFER_SIZE) {
220 av_log(s, AV_LOG_ERROR, "internal_buffer_count overflow (missing release_buffer?)\n");
224 if(avcodec_check_dimensions(s,w,h))
227 if(s->internal_buffer==NULL){
228 s->internal_buffer= av_mallocz((INTERNAL_BUFFER_SIZE+1)*sizeof(InternalBuffer));
231 s->internal_buffer= av_fast_realloc(
233 &s->internal_buffer_size,
234 sizeof(InternalBuffer)*FFMAX(99, s->internal_buffer_count+1)/*FIXME*/
238 buf= &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
239 picture_number= &(((InternalBuffer*)s->internal_buffer)[INTERNAL_BUFFER_SIZE]).last_pic_num; //FIXME ugly hack
242 if(buf->base[0] && (buf->width != w || buf->height != h || buf->pix_fmt != s->pix_fmt)){
244 av_freep(&buf->base[i]);
250 pic->age= *picture_number - buf->last_pic_num;
251 buf->last_pic_num= *picture_number;
253 int h_chroma_shift, v_chroma_shift;
260 avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
262 avcodec_align_dimensions(s, &w, &h);
264 if(!(s->flags&CODEC_FLAG_EMU_EDGE)){
270 // NOTE: do not align linesizes individually, this breaks e.g. assumptions
271 // that linesize[0] == 2*linesize[1] in the MPEG-encoder for 4:2:2
272 ff_fill_linesize(&picture, s->pix_fmt, w);
273 // increase alignment of w for next try (rhs gives the lowest bit set in w)
278 //STRIDE_ALIGN is 8 for SSE* but this does not work for SVQ1 chroma planes
279 //we could change STRIDE_ALIGN to 16 for x86/sse but it would increase the
280 //picture size unneccessarily in some cases. The solution here is not
281 //pretty and better ideas are welcome!
283 if(s->codec_id == CODEC_ID_SVQ1)
287 stride_align[i] = STRIDE_ALIGN;
288 unaligned |= picture.linesize[i] % stride_align[i];
292 tmpsize = ff_fill_pointer(&picture, NULL, s->pix_fmt, h);
296 for (i=0; i<3 && picture.data[i+1]; i++)
297 size[i] = picture.data[i+1] - picture.data[i];
298 size[i] = tmpsize - (picture.data[i] - picture.data[0]);
300 buf->last_pic_num= -256*256*256*64;
301 memset(buf->base, 0, sizeof(buf->base));
302 memset(buf->data, 0, sizeof(buf->data));
304 for(i=0; i<4 && size[i]; i++){
305 const int h_shift= i==0 ? 0 : h_chroma_shift;
306 const int v_shift= i==0 ? 0 : v_chroma_shift;
308 buf->linesize[i]= picture.linesize[i];
310 buf->base[i]= av_malloc(size[i]+16); //FIXME 16
311 if(buf->base[i]==NULL) return -1;
312 memset(buf->base[i], 128, size[i]);
314 // no edge if EDEG EMU or not planar YUV
315 if((s->flags&CODEC_FLAG_EMU_EDGE) || !size[2])
316 buf->data[i] = buf->base[i];
318 buf->data[i] = buf->base[i] + FFALIGN((buf->linesize[i]*EDGE_WIDTH>>v_shift) + (EDGE_WIDTH>>h_shift), stride_align[i]);
320 if(size[1] && !size[2])
321 ff_set_systematic_pal((uint32_t*)buf->data[1], s->pix_fmt);
322 buf->width = s->width;
323 buf->height = s->height;
324 buf->pix_fmt= s->pix_fmt;
325 pic->age= 256*256*256*64;
327 pic->type= FF_BUFFER_TYPE_INTERNAL;
330 pic->base[i]= buf->base[i];
331 pic->data[i]= buf->data[i];
332 pic->linesize[i]= buf->linesize[i];
334 s->internal_buffer_count++;
336 pic->reordered_opaque= s->reordered_opaque;
338 if(s->debug&FF_DEBUG_BUFFERS)
339 av_log(s, AV_LOG_DEBUG, "default_get_buffer called on pic %p, %d buffers used\n", pic, s->internal_buffer_count);
344 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic){
346 InternalBuffer *buf, *last;
348 assert(pic->type==FF_BUFFER_TYPE_INTERNAL);
349 assert(s->internal_buffer_count);
351 buf = NULL; /* avoids warning */
352 for(i=0; i<s->internal_buffer_count; i++){ //just 3-5 checks so is not worth to optimize
353 buf= &((InternalBuffer*)s->internal_buffer)[i];
354 if(buf->data[0] == pic->data[0])
357 assert(i < s->internal_buffer_count);
358 s->internal_buffer_count--;
359 last = &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
361 FFSWAP(InternalBuffer, *buf, *last);
365 // pic->base[i]=NULL;
367 //printf("R%X\n", pic->opaque);
369 if(s->debug&FF_DEBUG_BUFFERS)
370 av_log(s, AV_LOG_DEBUG, "default_release_buffer called on pic %p, %d buffers used\n", pic, s->internal_buffer_count);
373 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic){
377 /* If no picture return a new buffer */
378 if(pic->data[0] == NULL) {
379 /* We will copy from buffer, so must be readable */
380 pic->buffer_hints |= FF_BUFFER_HINTS_READABLE;
381 return s->get_buffer(s, pic);
384 /* If internal buffer type return the same buffer */
385 if(pic->type == FF_BUFFER_TYPE_INTERNAL)
389 * Not internal type and reget_buffer not overridden, emulate cr buffer
392 for(i = 0; i < 4; i++)
393 pic->data[i] = pic->base[i] = NULL;
395 /* Allocate new frame */
396 if (s->get_buffer(s, pic))
398 /* Copy image data from old buffer to new buffer */
399 av_picture_copy((AVPicture*)pic, (AVPicture*)&temp_pic, s->pix_fmt, s->width,
401 s->release_buffer(s, &temp_pic); // Release old frame
405 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size){
408 for(i=0; i<count; i++){
409 int r= func(c, (char*)arg + i*size);
415 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat *fmt){
416 while (*fmt != PIX_FMT_NONE && ff_is_hwaccel_pix_fmt(*fmt))
421 void avcodec_get_frame_defaults(AVFrame *pic){
422 memset(pic, 0, sizeof(AVFrame));
424 pic->pts= AV_NOPTS_VALUE;
428 AVFrame *avcodec_alloc_frame(void){
429 AVFrame *pic= av_malloc(sizeof(AVFrame));
431 if(pic==NULL) return NULL;
433 avcodec_get_frame_defaults(pic);
438 int attribute_align_arg avcodec_open(AVCodecContext *avctx, AVCodec *codec)
442 entangled_thread_counter++;
443 if(entangled_thread_counter != 1){
444 av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
448 if(avctx->codec || !codec)
451 if (codec->priv_data_size > 0) {
452 avctx->priv_data = av_mallocz(codec->priv_data_size);
453 if (!avctx->priv_data) {
454 ret = AVERROR(ENOMEM);
458 avctx->priv_data = NULL;
461 if(avctx->coded_width && avctx->coded_height)
462 avcodec_set_dimensions(avctx, avctx->coded_width, avctx->coded_height);
463 else if(avctx->width && avctx->height)
464 avcodec_set_dimensions(avctx, avctx->width, avctx->height);
466 if((avctx->coded_width||avctx->coded_height) && avcodec_check_dimensions(avctx,avctx->coded_width,avctx->coded_height)){
467 av_freep(&avctx->priv_data);
468 ret = AVERROR(EINVAL);
472 avctx->codec = codec;
473 avctx->codec_id = codec->id;
474 avctx->frame_number = 0;
475 if(avctx->codec->init){
476 ret = avctx->codec->init(avctx);
478 av_freep(&avctx->priv_data);
485 entangled_thread_counter--;
489 int attribute_align_arg avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
490 const short *samples)
492 if(buf_size < FF_MIN_BUFFER_SIZE && 0){
493 av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
496 if((avctx->codec->capabilities & CODEC_CAP_DELAY) || samples){
497 int ret = avctx->codec->encode(avctx, buf, buf_size, samples);
498 avctx->frame_number++;
504 int attribute_align_arg avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
507 if(buf_size < FF_MIN_BUFFER_SIZE){
508 av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
511 if(avcodec_check_dimensions(avctx,avctx->width,avctx->height))
513 if((avctx->codec->capabilities & CODEC_CAP_DELAY) || pict){
514 int ret = avctx->codec->encode(avctx, buf, buf_size, pict);
515 avctx->frame_number++;
516 emms_c(); //needed to avoid an emms_c() call before every return;
523 int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
524 const AVSubtitle *sub)
527 if(sub->start_display_time) {
528 av_log(avctx, AV_LOG_ERROR, "start_display_time must be 0.\n");
531 if(sub->num_rects == 0 || !sub->rects)
533 ret = avctx->codec->encode(avctx, buf, buf_size, sub);
534 avctx->frame_number++;
538 #if LIBAVCODEC_VERSION_MAJOR < 53
539 int attribute_align_arg avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
540 int *got_picture_ptr,
541 const uint8_t *buf, int buf_size)
544 av_init_packet(&avpkt);
546 avpkt.size = buf_size;
548 return avcodec_decode_video2(avctx, picture, got_picture_ptr, &avpkt);
552 int attribute_align_arg avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
553 int *got_picture_ptr,
559 if((avctx->coded_width||avctx->coded_height) && avcodec_check_dimensions(avctx,avctx->coded_width,avctx->coded_height))
561 if((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size){
562 ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
565 emms_c(); //needed to avoid an emms_c() call before every return;
567 if (*got_picture_ptr)
568 avctx->frame_number++;
575 #if LIBAVCODEC_VERSION_MAJOR < 53
576 int attribute_align_arg avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
578 const uint8_t *buf, int buf_size)
581 av_init_packet(&avpkt);
583 avpkt.size = buf_size;
585 return avcodec_decode_audio3(avctx, samples, frame_size_ptr, &avpkt);
589 int attribute_align_arg avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples,
595 if((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size){
596 //FIXME remove the check below _after_ ensuring that all audio check that the available space is enough
597 if(*frame_size_ptr < AVCODEC_MAX_AUDIO_FRAME_SIZE){
598 av_log(avctx, AV_LOG_ERROR, "buffer smaller than AVCODEC_MAX_AUDIO_FRAME_SIZE\n");
601 if(*frame_size_ptr < FF_MIN_BUFFER_SIZE ||
602 *frame_size_ptr < avctx->channels * avctx->frame_size * sizeof(int16_t)){
603 av_log(avctx, AV_LOG_ERROR, "buffer %d too small\n", *frame_size_ptr);
607 ret = avctx->codec->decode(avctx, samples, frame_size_ptr, avpkt);
608 avctx->frame_number++;
616 #if LIBAVCODEC_VERSION_MAJOR < 53
617 int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
619 const uint8_t *buf, int buf_size)
622 av_init_packet(&avpkt);
624 avpkt.size = buf_size;
626 return avcodec_decode_subtitle2(avctx, sub, got_sub_ptr, &avpkt);
630 int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
637 ret = avctx->codec->decode(avctx, sub, got_sub_ptr, avpkt);
639 avctx->frame_number++;
643 int avcodec_close(AVCodecContext *avctx)
645 entangled_thread_counter++;
646 if(entangled_thread_counter != 1){
647 av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
648 entangled_thread_counter--;
652 if (HAVE_THREADS && avctx->thread_opaque)
653 avcodec_thread_free(avctx);
654 if (avctx->codec->close)
655 avctx->codec->close(avctx);
656 avcodec_default_free_buffers(avctx);
657 av_freep(&avctx->priv_data);
659 entangled_thread_counter--;
663 AVCodec *avcodec_find_encoder(enum CodecID id)
668 if (p->encode != NULL && p->id == id)
675 AVCodec *avcodec_find_encoder_by_name(const char *name)
682 if (p->encode != NULL && strcmp(name,p->name) == 0)
689 AVCodec *avcodec_find_decoder(enum CodecID id)
694 if (p->decode != NULL && p->id == id)
701 AVCodec *avcodec_find_decoder_by_name(const char *name)
708 if (p->decode != NULL && strcmp(name,p->name) == 0)
715 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
717 const char *codec_name;
721 AVRational display_aspect_ratio;
724 p = avcodec_find_encoder(enc->codec_id);
726 p = avcodec_find_decoder(enc->codec_id);
729 codec_name = p->name;
730 } else if (enc->codec_id == CODEC_ID_MPEG2TS) {
731 /* fake mpeg2 transport stream codec (currently not
733 codec_name = "mpeg2ts";
734 } else if (enc->codec_name[0] != '\0') {
735 codec_name = enc->codec_name;
737 /* output avi tags */
738 if( isprint(enc->codec_tag&0xFF) && isprint((enc->codec_tag>>8)&0xFF)
739 && isprint((enc->codec_tag>>16)&0xFF) && isprint((enc->codec_tag>>24)&0xFF)){
740 snprintf(buf1, sizeof(buf1), "%c%c%c%c / 0x%04X",
741 enc->codec_tag & 0xff,
742 (enc->codec_tag >> 8) & 0xff,
743 (enc->codec_tag >> 16) & 0xff,
744 (enc->codec_tag >> 24) & 0xff,
747 snprintf(buf1, sizeof(buf1), "0x%04x", enc->codec_tag);
752 switch(enc->codec_type) {
753 case CODEC_TYPE_VIDEO:
754 snprintf(buf, buf_size,
756 codec_name, enc->mb_decision ? " (hq)" : "");
757 if (enc->pix_fmt != PIX_FMT_NONE) {
758 snprintf(buf + strlen(buf), buf_size - strlen(buf),
760 avcodec_get_pix_fmt_name(enc->pix_fmt));
763 snprintf(buf + strlen(buf), buf_size - strlen(buf),
765 enc->width, enc->height);
766 if (enc->sample_aspect_ratio.num) {
767 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
768 enc->width*enc->sample_aspect_ratio.num,
769 enc->height*enc->sample_aspect_ratio.den,
771 snprintf(buf + strlen(buf), buf_size - strlen(buf),
772 " [PAR %d:%d DAR %d:%d]",
773 enc->sample_aspect_ratio.num, enc->sample_aspect_ratio.den,
774 display_aspect_ratio.num, display_aspect_ratio.den);
776 if(av_log_get_level() >= AV_LOG_DEBUG){
777 int g= av_gcd(enc->time_base.num, enc->time_base.den);
778 snprintf(buf + strlen(buf), buf_size - strlen(buf),
780 enc->time_base.num/g, enc->time_base.den/g);
784 snprintf(buf + strlen(buf), buf_size - strlen(buf),
785 ", q=%d-%d", enc->qmin, enc->qmax);
787 bitrate = enc->bit_rate;
789 case CODEC_TYPE_AUDIO:
790 snprintf(buf, buf_size,
793 if (enc->sample_rate) {
794 snprintf(buf + strlen(buf), buf_size - strlen(buf),
795 ", %d Hz", enc->sample_rate);
797 av_strlcat(buf, ", ", buf_size);
798 avcodec_get_channel_layout_string(buf + strlen(buf), buf_size - strlen(buf), enc->channels, enc->channel_layout);
799 if (enc->sample_fmt != SAMPLE_FMT_NONE) {
800 snprintf(buf + strlen(buf), buf_size - strlen(buf),
801 ", %s", avcodec_get_sample_fmt_name(enc->sample_fmt));
804 /* for PCM codecs, compute bitrate directly */
805 switch(enc->codec_id) {
806 case CODEC_ID_PCM_F64BE:
807 case CODEC_ID_PCM_F64LE:
808 bitrate = enc->sample_rate * enc->channels * 64;
810 case CODEC_ID_PCM_S32LE:
811 case CODEC_ID_PCM_S32BE:
812 case CODEC_ID_PCM_U32LE:
813 case CODEC_ID_PCM_U32BE:
814 case CODEC_ID_PCM_F32BE:
815 case CODEC_ID_PCM_F32LE:
816 bitrate = enc->sample_rate * enc->channels * 32;
818 case CODEC_ID_PCM_S24LE:
819 case CODEC_ID_PCM_S24BE:
820 case CODEC_ID_PCM_U24LE:
821 case CODEC_ID_PCM_U24BE:
822 case CODEC_ID_PCM_S24DAUD:
823 bitrate = enc->sample_rate * enc->channels * 24;
825 case CODEC_ID_PCM_S16LE:
826 case CODEC_ID_PCM_S16BE:
827 case CODEC_ID_PCM_S16LE_PLANAR:
828 case CODEC_ID_PCM_U16LE:
829 case CODEC_ID_PCM_U16BE:
830 bitrate = enc->sample_rate * enc->channels * 16;
832 case CODEC_ID_PCM_S8:
833 case CODEC_ID_PCM_U8:
834 case CODEC_ID_PCM_ALAW:
835 case CODEC_ID_PCM_MULAW:
836 case CODEC_ID_PCM_ZORK:
837 bitrate = enc->sample_rate * enc->channels * 8;
840 bitrate = enc->bit_rate;
844 case CODEC_TYPE_DATA:
845 snprintf(buf, buf_size, "Data: %s", codec_name);
846 bitrate = enc->bit_rate;
848 case CODEC_TYPE_SUBTITLE:
849 snprintf(buf, buf_size, "Subtitle: %s", codec_name);
850 bitrate = enc->bit_rate;
852 case CODEC_TYPE_ATTACHMENT:
853 snprintf(buf, buf_size, "Attachment: %s", codec_name);
854 bitrate = enc->bit_rate;
857 snprintf(buf, buf_size, "Invalid Codec type %d", enc->codec_type);
861 if (enc->flags & CODEC_FLAG_PASS1)
862 snprintf(buf + strlen(buf), buf_size - strlen(buf),
864 if (enc->flags & CODEC_FLAG_PASS2)
865 snprintf(buf + strlen(buf), buf_size - strlen(buf),
869 snprintf(buf + strlen(buf), buf_size - strlen(buf),
870 ", %d kb/s", bitrate / 1000);
874 unsigned avcodec_version( void )
876 return LIBAVCODEC_VERSION_INT;
879 void avcodec_init(void)
881 static int initialized = 0;
883 if (initialized != 0)
887 dsputil_static_init();
890 void avcodec_flush_buffers(AVCodecContext *avctx)
892 if(avctx->codec->flush)
893 avctx->codec->flush(avctx);
896 void avcodec_default_free_buffers(AVCodecContext *s){
899 if(s->internal_buffer==NULL) return;
901 for(i=0; i<INTERNAL_BUFFER_SIZE; i++){
902 InternalBuffer *buf= &((InternalBuffer*)s->internal_buffer)[i];
904 av_freep(&buf->base[j]);
908 av_freep(&s->internal_buffer);
910 s->internal_buffer_count=0;
913 char av_get_pict_type_char(int pict_type){
915 case FF_I_TYPE: return 'I';
916 case FF_P_TYPE: return 'P';
917 case FF_B_TYPE: return 'B';
918 case FF_S_TYPE: return 'S';
919 case FF_SI_TYPE:return 'i';
920 case FF_SP_TYPE:return 'p';
921 case FF_BI_TYPE:return 'b';
926 int av_get_bits_per_sample(enum CodecID codec_id){
928 case CODEC_ID_ADPCM_SBPRO_2:
930 case CODEC_ID_ADPCM_SBPRO_3:
932 case CODEC_ID_ADPCM_SBPRO_4:
933 case CODEC_ID_ADPCM_CT:
935 case CODEC_ID_PCM_ALAW:
936 case CODEC_ID_PCM_MULAW:
937 case CODEC_ID_PCM_S8:
938 case CODEC_ID_PCM_U8:
939 case CODEC_ID_PCM_ZORK:
941 case CODEC_ID_PCM_S16BE:
942 case CODEC_ID_PCM_S16LE:
943 case CODEC_ID_PCM_S16LE_PLANAR:
944 case CODEC_ID_PCM_U16BE:
945 case CODEC_ID_PCM_U16LE:
947 case CODEC_ID_PCM_S24DAUD:
948 case CODEC_ID_PCM_S24BE:
949 case CODEC_ID_PCM_S24LE:
950 case CODEC_ID_PCM_U24BE:
951 case CODEC_ID_PCM_U24LE:
953 case CODEC_ID_PCM_S32BE:
954 case CODEC_ID_PCM_S32LE:
955 case CODEC_ID_PCM_U32BE:
956 case CODEC_ID_PCM_U32LE:
957 case CODEC_ID_PCM_F32BE:
958 case CODEC_ID_PCM_F32LE:
960 case CODEC_ID_PCM_F64BE:
961 case CODEC_ID_PCM_F64LE:
968 int av_get_bits_per_sample_format(enum SampleFormat sample_fmt) {
969 switch (sample_fmt) {
985 int avcodec_thread_init(AVCodecContext *s, int thread_count){
986 s->thread_count = thread_count;
991 unsigned int av_xiphlacing(unsigned char *s, unsigned int v)
1005 /* Wrapper to work around the lack of mkstemp() on mingw/cygin.
1006 * Also, tries to create file in /tmp first, if possible.
1007 * *prefix can be a character constant; *filename will be allocated internally.
1008 * Returns file descriptor of opened file (or -1 on error)
1009 * and opened file name in **filename. */
1010 int av_tempfile(char *prefix, char **filename) {
1013 *filename = tempnam(".", prefix);
1015 size_t len = strlen(prefix) + 12; /* room for "/tmp/" and "XXXXXX\0" */
1016 *filename = av_malloc(len);
1018 /* -----common section-----*/
1019 if (*filename == NULL) {
1020 av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot allocate file name\n");
1024 fd = open(*filename, O_RDWR | O_BINARY | O_CREAT, 0444);
1026 snprintf(*filename, len, "/tmp/%sXXXXXX", prefix);
1027 fd = mkstemp(*filename);
1029 snprintf(*filename, len, "./%sXXXXXX", prefix);
1030 fd = mkstemp(*filename);
1033 /* -----common section-----*/
1035 av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot open temporary file %s\n", *filename);
1038 return fd; /* success */
1044 } VideoFrameSizeAbbr;
1048 int rate_num, rate_den;
1049 } VideoFrameRateAbbr;
1051 static const VideoFrameSizeAbbr video_frame_size_abbrs[] = {
1052 { "ntsc", 720, 480 },
1053 { "pal", 720, 576 },
1054 { "qntsc", 352, 240 }, /* VCD compliant NTSC */
1055 { "qpal", 352, 288 }, /* VCD compliant PAL */
1056 { "sntsc", 640, 480 }, /* square pixel NTSC */
1057 { "spal", 768, 576 }, /* square pixel PAL */
1058 { "film", 352, 240 },
1059 { "ntsc-film", 352, 240 },
1060 { "sqcif", 128, 96 },
1061 { "qcif", 176, 144 },
1062 { "cif", 352, 288 },
1063 { "4cif", 704, 576 },
1064 { "16cif", 1408,1152 },
1065 { "qqvga", 160, 120 },
1066 { "qvga", 320, 240 },
1067 { "vga", 640, 480 },
1068 { "svga", 800, 600 },
1069 { "xga", 1024, 768 },
1070 { "uxga", 1600,1200 },
1071 { "qxga", 2048,1536 },
1072 { "sxga", 1280,1024 },
1073 { "qsxga", 2560,2048 },
1074 { "hsxga", 5120,4096 },
1075 { "wvga", 852, 480 },
1076 { "wxga", 1366, 768 },
1077 { "wsxga", 1600,1024 },
1078 { "wuxga", 1920,1200 },
1079 { "woxga", 2560,1600 },
1080 { "wqsxga", 3200,2048 },
1081 { "wquxga", 3840,2400 },
1082 { "whsxga", 6400,4096 },
1083 { "whuxga", 7680,4800 },
1084 { "cga", 320, 200 },
1085 { "ega", 640, 350 },
1086 { "hd480", 852, 480 },
1087 { "hd720", 1280, 720 },
1088 { "hd1080", 1920,1080 },
1091 static const VideoFrameRateAbbr video_frame_rate_abbrs[]= {
1092 { "ntsc", 30000, 1001 },
1094 { "qntsc", 30000, 1001 }, /* VCD compliant NTSC */
1095 { "qpal", 25, 1 }, /* VCD compliant PAL */
1096 { "sntsc", 30000, 1001 }, /* square pixel NTSC */
1097 { "spal", 25, 1 }, /* square pixel PAL */
1099 { "ntsc-film", 24000, 1001 },
1102 int av_parse_video_frame_size(int *width_ptr, int *height_ptr, const char *str)
1105 int n = FF_ARRAY_ELEMS(video_frame_size_abbrs);
1107 int frame_width = 0, frame_height = 0;
1110 if (!strcmp(video_frame_size_abbrs[i].abbr, str)) {
1111 frame_width = video_frame_size_abbrs[i].width;
1112 frame_height = video_frame_size_abbrs[i].height;
1118 frame_width = strtol(p, &p, 10);
1121 frame_height = strtol(p, &p, 10);
1123 if (frame_width <= 0 || frame_height <= 0)
1125 *width_ptr = frame_width;
1126 *height_ptr = frame_height;
1130 int av_parse_video_frame_rate(AVRational *frame_rate, const char *arg)
1133 int n = FF_ARRAY_ELEMS(video_frame_rate_abbrs);
1136 /* First, we check our abbreviation table */
1137 for (i = 0; i < n; ++i)
1138 if (!strcmp(video_frame_rate_abbrs[i].abbr, arg)) {
1139 frame_rate->num = video_frame_rate_abbrs[i].rate_num;
1140 frame_rate->den = video_frame_rate_abbrs[i].rate_den;
1144 /* Then, we try to parse it as fraction */
1145 cp = strchr(arg, '/');
1147 cp = strchr(arg, ':');
1150 frame_rate->num = strtol(arg, &cpp, 10);
1151 if (cpp != arg || cpp == cp)
1152 frame_rate->den = strtol(cp+1, &cpp, 10);
1154 frame_rate->num = 0;
1157 /* Finally we give up and parse it as double */
1158 AVRational time_base = av_d2q(strtod(arg, 0), 1001000);
1159 frame_rate->den = time_base.den;
1160 frame_rate->num = time_base.num;
1162 if (!frame_rate->num || !frame_rate->den)
1168 void ff_log_missing_feature(void *avc, const char *feature, int want_sample)
1170 av_log(avc, AV_LOG_WARNING, "%s not implemented. Update your FFmpeg "
1171 "version to the newest one from SVN. If the problem still "
1172 "occurs, it means that your file has a feature which has not "
1173 "been implemented.", feature);
1175 ff_log_ask_for_sample(avc, NULL);
1177 av_log(avc, AV_LOG_WARNING, "\n");
1180 void ff_log_ask_for_sample(void *avc, const char *msg)
1183 av_log(avc, AV_LOG_WARNING, "%s ", msg);
1184 av_log(avc, AV_LOG_WARNING, "If you want to help, upload a sample "
1185 "of this file to ftp://upload.ffmpeg.org/MPlayer/incoming/ "
1186 "and contact the ffmpeg-devel mailing list.\n");
1189 static AVHWAccel *first_hwaccel = NULL;
1191 void av_register_hwaccel(AVHWAccel *hwaccel)
1193 AVHWAccel **p = &first_hwaccel;
1197 hwaccel->next = NULL;
1200 AVHWAccel *av_hwaccel_next(AVHWAccel *hwaccel)
1202 return hwaccel ? hwaccel->next : first_hwaccel;
1205 AVHWAccel *ff_find_hwaccel(enum CodecID codec_id, enum PixelFormat pix_fmt)
1207 AVHWAccel *hwaccel=NULL;
1209 while((hwaccel= av_hwaccel_next(hwaccel))){
1210 if ( hwaccel->id == codec_id
1211 && hwaccel->pix_fmt == pix_fmt)