Libav 0.7.1
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00001 /* 00002 * utils for libavcodec 00003 * Copyright (c) 2001 Fabrice Bellard 00004 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at> 00005 * 00006 * This file is part of Libav. 00007 * 00008 * Libav is free software; you can redistribute it and/or 00009 * modify it under the terms of the GNU Lesser General Public 00010 * License as published by the Free Software Foundation; either 00011 * version 2.1 of the License, or (at your option) any later version. 00012 * 00013 * Libav is distributed in the hope that it will be useful, 00014 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00015 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00016 * Lesser General Public License for more details. 00017 * 00018 * You should have received a copy of the GNU Lesser General Public 00019 * License along with Libav; if not, write to the Free Software 00020 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00021 */ 00022 00028 #include "libavutil/avstring.h" 00029 #include "libavutil/integer.h" 00030 #include "libavutil/crc.h" 00031 #include "libavutil/pixdesc.h" 00032 #include "libavutil/audioconvert.h" 00033 #include "libavutil/imgutils.h" 00034 #include "libavutil/samplefmt.h" 00035 #include "libavutil/dict.h" 00036 #include "avcodec.h" 00037 #include "dsputil.h" 00038 #include "libavutil/opt.h" 00039 #include "imgconvert.h" 00040 #include "thread.h" 00041 #include "audioconvert.h" 00042 #include "internal.h" 00043 #include <stdlib.h> 00044 #include <stdarg.h> 00045 #include <limits.h> 00046 #include <float.h> 00047 00048 static int volatile entangled_thread_counter=0; 00049 static int (*ff_lockmgr_cb)(void **mutex, enum AVLockOp op); 00050 static void *codec_mutex; 00051 00052 void *av_fast_realloc(void *ptr, unsigned int *size, size_t min_size) 00053 { 00054 if(min_size < *size) 00055 return ptr; 00056 00057 min_size= FFMAX(17*min_size/16 + 32, min_size); 00058 00059 ptr= av_realloc(ptr, min_size); 00060 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 00061 min_size= 0; 00062 00063 *size= min_size; 00064 00065 return ptr; 00066 } 00067 00068 void av_fast_malloc(void *ptr, unsigned int *size, size_t min_size) 00069 { 00070 void **p = ptr; 00071 if (min_size < *size) 00072 return; 00073 min_size= FFMAX(17*min_size/16 + 32, min_size); 00074 av_free(*p); 00075 *p = av_malloc(min_size); 00076 if (!*p) min_size = 0; 00077 *size= min_size; 00078 } 00079 00080 /* encoder management */ 00081 static AVCodec *first_avcodec = NULL; 00082 00083 AVCodec *av_codec_next(AVCodec *c){ 00084 if(c) return c->next; 00085 else return first_avcodec; 00086 } 00087 00088 void avcodec_register(AVCodec *codec) 00089 { 00090 AVCodec **p; 00091 avcodec_init(); 00092 p = &first_avcodec; 00093 while (*p != NULL) p = &(*p)->next; 00094 *p = codec; 00095 codec->next = NULL; 00096 } 00097 00098 unsigned avcodec_get_edge_width(void) 00099 { 00100 return EDGE_WIDTH; 00101 } 00102 00103 void avcodec_set_dimensions(AVCodecContext *s, int width, int height){ 00104 s->coded_width = width; 00105 s->coded_height= height; 00106 s->width = -((-width )>>s->lowres); 00107 s->height= -((-height)>>s->lowres); 00108 } 00109 00110 typedef struct InternalBuffer{ 00111 int last_pic_num; 00112 uint8_t *base[4]; 00113 uint8_t *data[4]; 00114 int linesize[4]; 00115 int width, height; 00116 enum PixelFormat pix_fmt; 00117 }InternalBuffer; 00118 00119 #define INTERNAL_BUFFER_SIZE (32+1) 00120 00121 void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height, int linesize_align[4]){ 00122 int w_align= 1; 00123 int h_align= 1; 00124 00125 switch(s->pix_fmt){ 00126 case PIX_FMT_YUV420P: 00127 case PIX_FMT_YUYV422: 00128 case PIX_FMT_UYVY422: 00129 case PIX_FMT_YUV422P: 00130 case PIX_FMT_YUV440P: 00131 case PIX_FMT_YUV444P: 00132 case PIX_FMT_GRAY8: 00133 case PIX_FMT_GRAY16BE: 00134 case PIX_FMT_GRAY16LE: 00135 case PIX_FMT_YUVJ420P: 00136 case PIX_FMT_YUVJ422P: 00137 case PIX_FMT_YUVJ440P: 00138 case PIX_FMT_YUVJ444P: 00139 case PIX_FMT_YUVA420P: 00140 case PIX_FMT_YUV420P9LE: 00141 case PIX_FMT_YUV420P9BE: 00142 case PIX_FMT_YUV420P10LE: 00143 case PIX_FMT_YUV420P10BE: 00144 case PIX_FMT_YUV422P10LE: 00145 case PIX_FMT_YUV422P10BE: 00146 case PIX_FMT_YUV444P9LE: 00147 case PIX_FMT_YUV444P9BE: 00148 case PIX_FMT_YUV444P10LE: 00149 case PIX_FMT_YUV444P10BE: 00150 w_align= 16; //FIXME check for non mpeg style codecs and use less alignment 00151 h_align= 16; 00152 if(s->codec_id == CODEC_ID_MPEG2VIDEO || s->codec_id == CODEC_ID_MJPEG || s->codec_id == CODEC_ID_AMV || s->codec_id == CODEC_ID_THP || s->codec_id == CODEC_ID_H264) 00153 h_align= 32; // interlaced is rounded up to 2 MBs 00154 break; 00155 case PIX_FMT_YUV411P: 00156 case PIX_FMT_UYYVYY411: 00157 w_align=32; 00158 h_align=8; 00159 break; 00160 case PIX_FMT_YUV410P: 00161 if(s->codec_id == CODEC_ID_SVQ1){ 00162 w_align=64; 00163 h_align=64; 00164 } 00165 case PIX_FMT_RGB555: 00166 if(s->codec_id == CODEC_ID_RPZA){ 00167 w_align=4; 00168 h_align=4; 00169 } 00170 case PIX_FMT_PAL8: 00171 case PIX_FMT_BGR8: 00172 case PIX_FMT_RGB8: 00173 if(s->codec_id == CODEC_ID_SMC){ 00174 w_align=4; 00175 h_align=4; 00176 } 00177 break; 00178 case PIX_FMT_BGR24: 00179 if((s->codec_id == CODEC_ID_MSZH) || (s->codec_id == CODEC_ID_ZLIB)){ 00180 w_align=4; 00181 h_align=4; 00182 } 00183 break; 00184 default: 00185 w_align= 1; 00186 h_align= 1; 00187 break; 00188 } 00189 00190 *width = FFALIGN(*width , w_align); 00191 *height= FFALIGN(*height, h_align); 00192 if(s->codec_id == CODEC_ID_H264 || s->lowres) 00193 *height+=2; // some of the optimized chroma MC reads one line too much 00194 // which is also done in mpeg decoders with lowres > 0 00195 00196 linesize_align[0] = 00197 linesize_align[1] = 00198 linesize_align[2] = 00199 linesize_align[3] = STRIDE_ALIGN; 00200 //STRIDE_ALIGN is 8 for SSE* but this does not work for SVQ1 chroma planes 00201 //we could change STRIDE_ALIGN to 16 for x86/sse but it would increase the 00202 //picture size unneccessarily in some cases. The solution here is not 00203 //pretty and better ideas are welcome! 00204 #if HAVE_MMX 00205 if(s->codec_id == CODEC_ID_SVQ1 || s->codec_id == CODEC_ID_VP5 || 00206 s->codec_id == CODEC_ID_VP6 || s->codec_id == CODEC_ID_VP6F || 00207 s->codec_id == CODEC_ID_VP6A) { 00208 linesize_align[0] = 00209 linesize_align[1] = 00210 linesize_align[2] = 16; 00211 } 00212 #endif 00213 } 00214 00215 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height){ 00216 int chroma_shift = av_pix_fmt_descriptors[s->pix_fmt].log2_chroma_w; 00217 int linesize_align[4]; 00218 int align; 00219 avcodec_align_dimensions2(s, width, height, linesize_align); 00220 align = FFMAX(linesize_align[0], linesize_align[3]); 00221 linesize_align[1] <<= chroma_shift; 00222 linesize_align[2] <<= chroma_shift; 00223 align = FFMAX3(align, linesize_align[1], linesize_align[2]); 00224 *width=FFALIGN(*width, align); 00225 } 00226 00227 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic){ 00228 int i; 00229 int w= s->width; 00230 int h= s->height; 00231 InternalBuffer *buf; 00232 int *picture_number; 00233 00234 if(pic->data[0]!=NULL) { 00235 av_log(s, AV_LOG_ERROR, "pic->data[0]!=NULL in avcodec_default_get_buffer\n"); 00236 return -1; 00237 } 00238 if(s->internal_buffer_count >= INTERNAL_BUFFER_SIZE) { 00239 av_log(s, AV_LOG_ERROR, "internal_buffer_count overflow (missing release_buffer?)\n"); 00240 return -1; 00241 } 00242 00243 if(av_image_check_size(w, h, 0, s)) 00244 return -1; 00245 00246 if(s->internal_buffer==NULL){ 00247 s->internal_buffer= av_mallocz((INTERNAL_BUFFER_SIZE+1)*sizeof(InternalBuffer)); 00248 } 00249 #if 0 00250 s->internal_buffer= av_fast_realloc( 00251 s->internal_buffer, 00252 &s->internal_buffer_size, 00253 sizeof(InternalBuffer)*FFMAX(99, s->internal_buffer_count+1)/*FIXME*/ 00254 ); 00255 #endif 00256 00257 buf= &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count]; 00258 picture_number= &(((InternalBuffer*)s->internal_buffer)[INTERNAL_BUFFER_SIZE]).last_pic_num; //FIXME ugly hack 00259 (*picture_number)++; 00260 00261 if(buf->base[0] && (buf->width != w || buf->height != h || buf->pix_fmt != s->pix_fmt)){ 00262 if(s->active_thread_type&FF_THREAD_FRAME) { 00263 av_log_missing_feature(s, "Width/height changing with frame threads is", 0); 00264 return -1; 00265 } 00266 00267 for(i=0; i<4; i++){ 00268 av_freep(&buf->base[i]); 00269 buf->data[i]= NULL; 00270 } 00271 } 00272 00273 if(buf->base[0]){ 00274 pic->age= *picture_number - buf->last_pic_num; 00275 buf->last_pic_num= *picture_number; 00276 }else{ 00277 int h_chroma_shift, v_chroma_shift; 00278 int size[4] = {0}; 00279 int tmpsize; 00280 int unaligned; 00281 AVPicture picture; 00282 int stride_align[4]; 00283 const int pixel_size = av_pix_fmt_descriptors[s->pix_fmt].comp[0].step_minus1+1; 00284 00285 avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift); 00286 00287 avcodec_align_dimensions2(s, &w, &h, stride_align); 00288 00289 if(!(s->flags&CODEC_FLAG_EMU_EDGE)){ 00290 w+= EDGE_WIDTH*2; 00291 h+= EDGE_WIDTH*2; 00292 } 00293 00294 do { 00295 // NOTE: do not align linesizes individually, this breaks e.g. assumptions 00296 // that linesize[0] == 2*linesize[1] in the MPEG-encoder for 4:2:2 00297 av_image_fill_linesizes(picture.linesize, s->pix_fmt, w); 00298 // increase alignment of w for next try (rhs gives the lowest bit set in w) 00299 w += w & ~(w-1); 00300 00301 unaligned = 0; 00302 for (i=0; i<4; i++){ 00303 unaligned |= picture.linesize[i] % stride_align[i]; 00304 } 00305 } while (unaligned); 00306 00307 tmpsize = av_image_fill_pointers(picture.data, s->pix_fmt, h, NULL, picture.linesize); 00308 if (tmpsize < 0) 00309 return -1; 00310 00311 for (i=0; i<3 && picture.data[i+1]; i++) 00312 size[i] = picture.data[i+1] - picture.data[i]; 00313 size[i] = tmpsize - (picture.data[i] - picture.data[0]); 00314 00315 buf->last_pic_num= -256*256*256*64; 00316 memset(buf->base, 0, sizeof(buf->base)); 00317 memset(buf->data, 0, sizeof(buf->data)); 00318 00319 for(i=0; i<4 && size[i]; i++){ 00320 const int h_shift= i==0 ? 0 : h_chroma_shift; 00321 const int v_shift= i==0 ? 0 : v_chroma_shift; 00322 00323 buf->linesize[i]= picture.linesize[i]; 00324 00325 buf->base[i]= av_malloc(size[i]+16); //FIXME 16 00326 if(buf->base[i]==NULL) return -1; 00327 memset(buf->base[i], 128, size[i]); 00328 00329 // no edge if EDGE EMU or not planar YUV 00330 if((s->flags&CODEC_FLAG_EMU_EDGE) || !size[2]) 00331 buf->data[i] = buf->base[i]; 00332 else 00333 buf->data[i] = buf->base[i] + FFALIGN((buf->linesize[i]*EDGE_WIDTH>>v_shift) + (pixel_size*EDGE_WIDTH>>h_shift), stride_align[i]); 00334 } 00335 if(size[1] && !size[2]) 00336 ff_set_systematic_pal2((uint32_t*)buf->data[1], s->pix_fmt); 00337 buf->width = s->width; 00338 buf->height = s->height; 00339 buf->pix_fmt= s->pix_fmt; 00340 pic->age= 256*256*256*64; 00341 } 00342 pic->type= FF_BUFFER_TYPE_INTERNAL; 00343 00344 for(i=0; i<4; i++){ 00345 pic->base[i]= buf->base[i]; 00346 pic->data[i]= buf->data[i]; 00347 pic->linesize[i]= buf->linesize[i]; 00348 } 00349 s->internal_buffer_count++; 00350 00351 if(s->pkt) pic->pkt_pts= s->pkt->pts; 00352 else pic->pkt_pts= AV_NOPTS_VALUE; 00353 pic->reordered_opaque= s->reordered_opaque; 00354 00355 if(s->debug&FF_DEBUG_BUFFERS) 00356 av_log(s, AV_LOG_DEBUG, "default_get_buffer called on pic %p, %d buffers used\n", pic, s->internal_buffer_count); 00357 00358 return 0; 00359 } 00360 00361 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic){ 00362 int i; 00363 InternalBuffer *buf, *last; 00364 00365 assert(pic->type==FF_BUFFER_TYPE_INTERNAL); 00366 assert(s->internal_buffer_count); 00367 00368 if(s->internal_buffer){ 00369 buf = NULL; /* avoids warning */ 00370 for(i=0; i<s->internal_buffer_count; i++){ //just 3-5 checks so is not worth to optimize 00371 buf= &((InternalBuffer*)s->internal_buffer)[i]; 00372 if(buf->data[0] == pic->data[0]) 00373 break; 00374 } 00375 assert(i < s->internal_buffer_count); 00376 s->internal_buffer_count--; 00377 last = &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count]; 00378 00379 FFSWAP(InternalBuffer, *buf, *last); 00380 } 00381 00382 for(i=0; i<4; i++){ 00383 pic->data[i]=NULL; 00384 // pic->base[i]=NULL; 00385 } 00386 //printf("R%X\n", pic->opaque); 00387 00388 if(s->debug&FF_DEBUG_BUFFERS) 00389 av_log(s, AV_LOG_DEBUG, "default_release_buffer called on pic %p, %d buffers used\n", pic, s->internal_buffer_count); 00390 } 00391 00392 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic){ 00393 AVFrame temp_pic; 00394 int i; 00395 00396 /* If no picture return a new buffer */ 00397 if(pic->data[0] == NULL) { 00398 /* We will copy from buffer, so must be readable */ 00399 pic->buffer_hints |= FF_BUFFER_HINTS_READABLE; 00400 return s->get_buffer(s, pic); 00401 } 00402 00403 /* If internal buffer type return the same buffer */ 00404 if(pic->type == FF_BUFFER_TYPE_INTERNAL) { 00405 if(s->pkt) pic->pkt_pts= s->pkt->pts; 00406 else pic->pkt_pts= AV_NOPTS_VALUE; 00407 pic->reordered_opaque= s->reordered_opaque; 00408 return 0; 00409 } 00410 00411 /* 00412 * Not internal type and reget_buffer not overridden, emulate cr buffer 00413 */ 00414 temp_pic = *pic; 00415 for(i = 0; i < 4; i++) 00416 pic->data[i] = pic->base[i] = NULL; 00417 pic->opaque = NULL; 00418 /* Allocate new frame */ 00419 if (s->get_buffer(s, pic)) 00420 return -1; 00421 /* Copy image data from old buffer to new buffer */ 00422 av_picture_copy((AVPicture*)pic, (AVPicture*)&temp_pic, s->pix_fmt, s->width, 00423 s->height); 00424 s->release_buffer(s, &temp_pic); // Release old frame 00425 return 0; 00426 } 00427 00428 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size){ 00429 int i; 00430 00431 for(i=0; i<count; i++){ 00432 int r= func(c, (char*)arg + i*size); 00433 if(ret) ret[i]= r; 00434 } 00435 return 0; 00436 } 00437 00438 int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int jobnr, int threadnr),void *arg, int *ret, int count){ 00439 int i; 00440 00441 for(i=0; i<count; i++){ 00442 int r= func(c, arg, i, 0); 00443 if(ret) ret[i]= r; 00444 } 00445 return 0; 00446 } 00447 00448 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat *fmt){ 00449 while (*fmt != PIX_FMT_NONE && ff_is_hwaccel_pix_fmt(*fmt)) 00450 ++fmt; 00451 return fmt[0]; 00452 } 00453 00454 void avcodec_get_frame_defaults(AVFrame *pic){ 00455 memset(pic, 0, sizeof(AVFrame)); 00456 00457 pic->pts= AV_NOPTS_VALUE; 00458 pic->key_frame= 1; 00459 } 00460 00461 AVFrame *avcodec_alloc_frame(void){ 00462 AVFrame *pic= av_malloc(sizeof(AVFrame)); 00463 00464 if(pic==NULL) return NULL; 00465 00466 avcodec_get_frame_defaults(pic); 00467 00468 return pic; 00469 } 00470 00471 #if FF_API_AVCODEC_OPEN 00472 int attribute_align_arg avcodec_open(AVCodecContext *avctx, AVCodec *codec) 00473 { 00474 return avcodec_open2(avctx, codec, NULL); 00475 } 00476 #endif 00477 00478 int attribute_align_arg avcodec_open2(AVCodecContext *avctx, AVCodec *codec, AVDictionary **options) 00479 { 00480 int ret = 0; 00481 AVDictionary *tmp = NULL; 00482 00483 if (options) 00484 av_dict_copy(&tmp, *options, 0); 00485 00486 /* If there is a user-supplied mutex locking routine, call it. */ 00487 if (ff_lockmgr_cb) { 00488 if ((*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN)) 00489 return -1; 00490 } 00491 00492 entangled_thread_counter++; 00493 if(entangled_thread_counter != 1){ 00494 av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n"); 00495 ret = -1; 00496 goto end; 00497 } 00498 00499 if(avctx->codec || !codec) { 00500 ret = AVERROR(EINVAL); 00501 goto end; 00502 } 00503 00504 if (codec->priv_data_size > 0) { 00505 if(!avctx->priv_data){ 00506 avctx->priv_data = av_mallocz(codec->priv_data_size); 00507 if (!avctx->priv_data) { 00508 ret = AVERROR(ENOMEM); 00509 goto end; 00510 } 00511 if (codec->priv_class) { 00512 *(AVClass**)avctx->priv_data= codec->priv_class; 00513 av_opt_set_defaults(avctx->priv_data); 00514 } 00515 } 00516 if (codec->priv_class && (ret = av_opt_set_dict(avctx->priv_data, &tmp)) < 0) 00517 goto free_and_end; 00518 } else { 00519 avctx->priv_data = NULL; 00520 } 00521 if ((ret = av_opt_set_dict(avctx, &tmp)) < 0) 00522 goto free_and_end; 00523 00524 if(avctx->coded_width && avctx->coded_height) 00525 avcodec_set_dimensions(avctx, avctx->coded_width, avctx->coded_height); 00526 else if(avctx->width && avctx->height) 00527 avcodec_set_dimensions(avctx, avctx->width, avctx->height); 00528 00529 if ((avctx->coded_width || avctx->coded_height || avctx->width || avctx->height) 00530 && ( av_image_check_size(avctx->coded_width, avctx->coded_height, 0, avctx) < 0 00531 || av_image_check_size(avctx->width, avctx->height, 0, avctx) < 0)) { 00532 av_log(avctx, AV_LOG_WARNING, "ignoring invalid width/height values\n"); 00533 avcodec_set_dimensions(avctx, 0, 0); 00534 } 00535 00536 /* if the decoder init function was already called previously, 00537 free the already allocated subtitle_header before overwriting it */ 00538 if (codec->decode) 00539 av_freep(&avctx->subtitle_header); 00540 00541 #define SANE_NB_CHANNELS 128U 00542 if (avctx->channels > SANE_NB_CHANNELS) { 00543 ret = AVERROR(EINVAL); 00544 goto free_and_end; 00545 } 00546 00547 avctx->codec = codec; 00548 if ((avctx->codec_type == AVMEDIA_TYPE_UNKNOWN || avctx->codec_type == codec->type) && 00549 avctx->codec_id == CODEC_ID_NONE) { 00550 avctx->codec_type = codec->type; 00551 avctx->codec_id = codec->id; 00552 } 00553 if (avctx->codec_id != codec->id || (avctx->codec_type != codec->type 00554 && avctx->codec_type != AVMEDIA_TYPE_ATTACHMENT)) { 00555 av_log(avctx, AV_LOG_ERROR, "codec type or id mismatches\n"); 00556 ret = AVERROR(EINVAL); 00557 goto free_and_end; 00558 } 00559 avctx->frame_number = 0; 00560 00561 if (HAVE_THREADS && !avctx->thread_opaque) { 00562 ret = ff_thread_init(avctx); 00563 if (ret < 0) { 00564 goto free_and_end; 00565 } 00566 } 00567 00568 if (avctx->codec->max_lowres < avctx->lowres) { 00569 av_log(avctx, AV_LOG_ERROR, "The maximum value for lowres supported by the decoder is %d\n", 00570 avctx->codec->max_lowres); 00571 ret = AVERROR(EINVAL); 00572 goto free_and_end; 00573 } 00574 if (avctx->codec->encode) { 00575 int i; 00576 if (avctx->codec->sample_fmts) { 00577 for (i = 0; avctx->codec->sample_fmts[i] != AV_SAMPLE_FMT_NONE; i++) 00578 if (avctx->sample_fmt == avctx->codec->sample_fmts[i]) 00579 break; 00580 if (avctx->codec->sample_fmts[i] == AV_SAMPLE_FMT_NONE) { 00581 av_log(avctx, AV_LOG_ERROR, "Specified sample_fmt is not supported.\n"); 00582 ret = AVERROR(EINVAL); 00583 goto free_and_end; 00584 } 00585 } 00586 if (avctx->codec->supported_samplerates) { 00587 for (i = 0; avctx->codec->supported_samplerates[i] != 0; i++) 00588 if (avctx->sample_rate == avctx->codec->supported_samplerates[i]) 00589 break; 00590 if (avctx->codec->supported_samplerates[i] == 0) { 00591 av_log(avctx, AV_LOG_ERROR, "Specified sample_rate is not supported\n"); 00592 ret = AVERROR(EINVAL); 00593 goto free_and_end; 00594 } 00595 } 00596 if (avctx->codec->channel_layouts) { 00597 if (!avctx->channel_layout) { 00598 av_log(avctx, AV_LOG_WARNING, "channel_layout not specified\n"); 00599 } else { 00600 for (i = 0; avctx->codec->channel_layouts[i] != 0; i++) 00601 if (avctx->channel_layout == avctx->codec->channel_layouts[i]) 00602 break; 00603 if (avctx->codec->channel_layouts[i] == 0) { 00604 av_log(avctx, AV_LOG_ERROR, "Specified channel_layout is not supported\n"); 00605 ret = AVERROR(EINVAL); 00606 goto free_and_end; 00607 } 00608 } 00609 } 00610 if (avctx->channel_layout && avctx->channels) { 00611 if (av_get_channel_layout_nb_channels(avctx->channel_layout) != avctx->channels) { 00612 av_log(avctx, AV_LOG_ERROR, "channel layout does not match number of channels\n"); 00613 ret = AVERROR(EINVAL); 00614 goto free_and_end; 00615 } 00616 } else if (avctx->channel_layout) { 00617 avctx->channels = av_get_channel_layout_nb_channels(avctx->channel_layout); 00618 } 00619 } 00620 00621 if(avctx->codec->init && !(avctx->active_thread_type&FF_THREAD_FRAME)){ 00622 ret = avctx->codec->init(avctx); 00623 if (ret < 0) { 00624 goto free_and_end; 00625 } 00626 } 00627 end: 00628 entangled_thread_counter--; 00629 00630 /* Release any user-supplied mutex. */ 00631 if (ff_lockmgr_cb) { 00632 (*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE); 00633 } 00634 if (options) { 00635 av_dict_free(options); 00636 *options = tmp; 00637 } 00638 00639 return ret; 00640 free_and_end: 00641 av_dict_free(&tmp); 00642 av_freep(&avctx->priv_data); 00643 avctx->codec= NULL; 00644 goto end; 00645 } 00646 00647 int attribute_align_arg avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size, 00648 const short *samples) 00649 { 00650 if(buf_size < FF_MIN_BUFFER_SIZE && 0){ 00651 av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n"); 00652 return -1; 00653 } 00654 if((avctx->codec->capabilities & CODEC_CAP_DELAY) || samples){ 00655 int ret = avctx->codec->encode(avctx, buf, buf_size, samples); 00656 avctx->frame_number++; 00657 return ret; 00658 }else 00659 return 0; 00660 } 00661 00662 int attribute_align_arg avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size, 00663 const AVFrame *pict) 00664 { 00665 if(buf_size < FF_MIN_BUFFER_SIZE){ 00666 av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n"); 00667 return -1; 00668 } 00669 if(av_image_check_size(avctx->width, avctx->height, 0, avctx)) 00670 return -1; 00671 if((avctx->codec->capabilities & CODEC_CAP_DELAY) || pict){ 00672 int ret = avctx->codec->encode(avctx, buf, buf_size, pict); 00673 avctx->frame_number++; 00674 emms_c(); //needed to avoid an emms_c() call before every return; 00675 00676 return ret; 00677 }else 00678 return 0; 00679 } 00680 00681 int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size, 00682 const AVSubtitle *sub) 00683 { 00684 int ret; 00685 if(sub->start_display_time) { 00686 av_log(avctx, AV_LOG_ERROR, "start_display_time must be 0.\n"); 00687 return -1; 00688 } 00689 if(sub->num_rects == 0 || !sub->rects) 00690 return -1; 00691 ret = avctx->codec->encode(avctx, buf, buf_size, sub); 00692 avctx->frame_number++; 00693 return ret; 00694 } 00695 00696 int attribute_align_arg avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture, 00697 int *got_picture_ptr, 00698 AVPacket *avpkt) 00699 { 00700 int ret; 00701 00702 *got_picture_ptr= 0; 00703 if((avctx->coded_width||avctx->coded_height) && av_image_check_size(avctx->coded_width, avctx->coded_height, 0, avctx)) 00704 return -1; 00705 00706 avctx->pkt = avpkt; 00707 00708 if((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size || (avctx->active_thread_type&FF_THREAD_FRAME)){ 00709 if (HAVE_PTHREADS && avctx->active_thread_type&FF_THREAD_FRAME) 00710 ret = ff_thread_decode_frame(avctx, picture, got_picture_ptr, 00711 avpkt); 00712 else { 00713 ret = avctx->codec->decode(avctx, picture, got_picture_ptr, 00714 avpkt); 00715 picture->pkt_dts= avpkt->dts; 00716 } 00717 00718 emms_c(); //needed to avoid an emms_c() call before every return; 00719 00720 if (*got_picture_ptr) 00721 avctx->frame_number++; 00722 }else 00723 ret= 0; 00724 00725 return ret; 00726 } 00727 00728 int attribute_align_arg avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples, 00729 int *frame_size_ptr, 00730 AVPacket *avpkt) 00731 { 00732 int ret; 00733 00734 avctx->pkt = avpkt; 00735 00736 if((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size){ 00737 //FIXME remove the check below _after_ ensuring that all audio check that the available space is enough 00738 if(*frame_size_ptr < AVCODEC_MAX_AUDIO_FRAME_SIZE){ 00739 av_log(avctx, AV_LOG_ERROR, "buffer smaller than AVCODEC_MAX_AUDIO_FRAME_SIZE\n"); 00740 return -1; 00741 } 00742 if(*frame_size_ptr < FF_MIN_BUFFER_SIZE || 00743 *frame_size_ptr < avctx->channels * avctx->frame_size * sizeof(int16_t)){ 00744 av_log(avctx, AV_LOG_ERROR, "buffer %d too small\n", *frame_size_ptr); 00745 return -1; 00746 } 00747 00748 ret = avctx->codec->decode(avctx, samples, frame_size_ptr, avpkt); 00749 avctx->frame_number++; 00750 }else{ 00751 ret= 0; 00752 *frame_size_ptr=0; 00753 } 00754 return ret; 00755 } 00756 00757 int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub, 00758 int *got_sub_ptr, 00759 AVPacket *avpkt) 00760 { 00761 int ret; 00762 00763 avctx->pkt = avpkt; 00764 *got_sub_ptr = 0; 00765 ret = avctx->codec->decode(avctx, sub, got_sub_ptr, avpkt); 00766 if (*got_sub_ptr) 00767 avctx->frame_number++; 00768 return ret; 00769 } 00770 00771 void avsubtitle_free(AVSubtitle *sub) 00772 { 00773 int i; 00774 00775 for (i = 0; i < sub->num_rects; i++) 00776 { 00777 av_freep(&sub->rects[i]->pict.data[0]); 00778 av_freep(&sub->rects[i]->pict.data[1]); 00779 av_freep(&sub->rects[i]->pict.data[2]); 00780 av_freep(&sub->rects[i]->pict.data[3]); 00781 av_freep(&sub->rects[i]->text); 00782 av_freep(&sub->rects[i]->ass); 00783 av_freep(&sub->rects[i]); 00784 } 00785 00786 av_freep(&sub->rects); 00787 00788 memset(sub, 0, sizeof(AVSubtitle)); 00789 } 00790 00791 av_cold int avcodec_close(AVCodecContext *avctx) 00792 { 00793 /* If there is a user-supplied mutex locking routine, call it. */ 00794 if (ff_lockmgr_cb) { 00795 if ((*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN)) 00796 return -1; 00797 } 00798 00799 entangled_thread_counter++; 00800 if(entangled_thread_counter != 1){ 00801 av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n"); 00802 entangled_thread_counter--; 00803 return -1; 00804 } 00805 00806 if (HAVE_THREADS && avctx->thread_opaque) 00807 ff_thread_free(avctx); 00808 if (avctx->codec && avctx->codec->close) 00809 avctx->codec->close(avctx); 00810 avcodec_default_free_buffers(avctx); 00811 avctx->coded_frame = NULL; 00812 if (avctx->codec && avctx->codec->priv_class) 00813 av_opt_free(avctx->priv_data); 00814 av_opt_free(avctx); 00815 av_freep(&avctx->priv_data); 00816 if(avctx->codec && avctx->codec->encode) 00817 av_freep(&avctx->extradata); 00818 avctx->codec = NULL; 00819 avctx->active_thread_type = 0; 00820 entangled_thread_counter--; 00821 00822 /* Release any user-supplied mutex. */ 00823 if (ff_lockmgr_cb) { 00824 (*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE); 00825 } 00826 return 0; 00827 } 00828 00829 AVCodec *avcodec_find_encoder(enum CodecID id) 00830 { 00831 AVCodec *p, *experimental=NULL; 00832 p = first_avcodec; 00833 while (p) { 00834 if (p->encode != NULL && p->id == id) { 00835 if (p->capabilities & CODEC_CAP_EXPERIMENTAL && !experimental) { 00836 experimental = p; 00837 } else 00838 return p; 00839 } 00840 p = p->next; 00841 } 00842 return experimental; 00843 } 00844 00845 AVCodec *avcodec_find_encoder_by_name(const char *name) 00846 { 00847 AVCodec *p; 00848 if (!name) 00849 return NULL; 00850 p = first_avcodec; 00851 while (p) { 00852 if (p->encode != NULL && strcmp(name,p->name) == 0) 00853 return p; 00854 p = p->next; 00855 } 00856 return NULL; 00857 } 00858 00859 AVCodec *avcodec_find_decoder(enum CodecID id) 00860 { 00861 AVCodec *p; 00862 p = first_avcodec; 00863 while (p) { 00864 if (p->decode != NULL && p->id == id) 00865 return p; 00866 p = p->next; 00867 } 00868 return NULL; 00869 } 00870 00871 AVCodec *avcodec_find_decoder_by_name(const char *name) 00872 { 00873 AVCodec *p; 00874 if (!name) 00875 return NULL; 00876 p = first_avcodec; 00877 while (p) { 00878 if (p->decode != NULL && strcmp(name,p->name) == 0) 00879 return p; 00880 p = p->next; 00881 } 00882 return NULL; 00883 } 00884 00885 static int get_bit_rate(AVCodecContext *ctx) 00886 { 00887 int bit_rate; 00888 int bits_per_sample; 00889 00890 switch(ctx->codec_type) { 00891 case AVMEDIA_TYPE_VIDEO: 00892 case AVMEDIA_TYPE_DATA: 00893 case AVMEDIA_TYPE_SUBTITLE: 00894 case AVMEDIA_TYPE_ATTACHMENT: 00895 bit_rate = ctx->bit_rate; 00896 break; 00897 case AVMEDIA_TYPE_AUDIO: 00898 bits_per_sample = av_get_bits_per_sample(ctx->codec_id); 00899 bit_rate = bits_per_sample ? ctx->sample_rate * ctx->channels * bits_per_sample : ctx->bit_rate; 00900 break; 00901 default: 00902 bit_rate = 0; 00903 break; 00904 } 00905 return bit_rate; 00906 } 00907 00908 size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag) 00909 { 00910 int i, len, ret = 0; 00911 00912 for (i = 0; i < 4; i++) { 00913 len = snprintf(buf, buf_size, 00914 isprint(codec_tag&0xFF) ? "%c" : "[%d]", codec_tag&0xFF); 00915 buf += len; 00916 buf_size = buf_size > len ? buf_size - len : 0; 00917 ret += len; 00918 codec_tag>>=8; 00919 } 00920 return ret; 00921 } 00922 00923 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode) 00924 { 00925 const char *codec_name; 00926 const char *profile = NULL; 00927 AVCodec *p; 00928 char buf1[32]; 00929 int bitrate; 00930 AVRational display_aspect_ratio; 00931 00932 if (encode) 00933 p = avcodec_find_encoder(enc->codec_id); 00934 else 00935 p = avcodec_find_decoder(enc->codec_id); 00936 00937 if (p) { 00938 codec_name = p->name; 00939 profile = av_get_profile_name(p, enc->profile); 00940 } else if (enc->codec_id == CODEC_ID_MPEG2TS) { 00941 /* fake mpeg2 transport stream codec (currently not 00942 registered) */ 00943 codec_name = "mpeg2ts"; 00944 } else if (enc->codec_name[0] != '\0') { 00945 codec_name = enc->codec_name; 00946 } else { 00947 /* output avi tags */ 00948 char tag_buf[32]; 00949 av_get_codec_tag_string(tag_buf, sizeof(tag_buf), enc->codec_tag); 00950 snprintf(buf1, sizeof(buf1), "%s / 0x%04X", tag_buf, enc->codec_tag); 00951 codec_name = buf1; 00952 } 00953 00954 switch(enc->codec_type) { 00955 case AVMEDIA_TYPE_VIDEO: 00956 snprintf(buf, buf_size, 00957 "Video: %s%s", 00958 codec_name, enc->mb_decision ? " (hq)" : ""); 00959 if (profile) 00960 snprintf(buf + strlen(buf), buf_size - strlen(buf), 00961 " (%s)", profile); 00962 if (enc->pix_fmt != PIX_FMT_NONE) { 00963 snprintf(buf + strlen(buf), buf_size - strlen(buf), 00964 ", %s", 00965 av_get_pix_fmt_name(enc->pix_fmt)); 00966 } 00967 if (enc->width) { 00968 snprintf(buf + strlen(buf), buf_size - strlen(buf), 00969 ", %dx%d", 00970 enc->width, enc->height); 00971 if (enc->sample_aspect_ratio.num) { 00972 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den, 00973 enc->width*enc->sample_aspect_ratio.num, 00974 enc->height*enc->sample_aspect_ratio.den, 00975 1024*1024); 00976 snprintf(buf + strlen(buf), buf_size - strlen(buf), 00977 " [PAR %d:%d DAR %d:%d]", 00978 enc->sample_aspect_ratio.num, enc->sample_aspect_ratio.den, 00979 display_aspect_ratio.num, display_aspect_ratio.den); 00980 } 00981 if(av_log_get_level() >= AV_LOG_DEBUG){ 00982 int g= av_gcd(enc->time_base.num, enc->time_base.den); 00983 snprintf(buf + strlen(buf), buf_size - strlen(buf), 00984 ", %d/%d", 00985 enc->time_base.num/g, enc->time_base.den/g); 00986 } 00987 } 00988 if (encode) { 00989 snprintf(buf + strlen(buf), buf_size - strlen(buf), 00990 ", q=%d-%d", enc->qmin, enc->qmax); 00991 } 00992 break; 00993 case AVMEDIA_TYPE_AUDIO: 00994 snprintf(buf, buf_size, 00995 "Audio: %s", 00996 codec_name); 00997 if (profile) 00998 snprintf(buf + strlen(buf), buf_size - strlen(buf), 00999 " (%s)", profile); 01000 if (enc->sample_rate) { 01001 snprintf(buf + strlen(buf), buf_size - strlen(buf), 01002 ", %d Hz", enc->sample_rate); 01003 } 01004 av_strlcat(buf, ", ", buf_size); 01005 av_get_channel_layout_string(buf + strlen(buf), buf_size - strlen(buf), enc->channels, enc->channel_layout); 01006 if (enc->sample_fmt != AV_SAMPLE_FMT_NONE) { 01007 snprintf(buf + strlen(buf), buf_size - strlen(buf), 01008 ", %s", av_get_sample_fmt_name(enc->sample_fmt)); 01009 } 01010 break; 01011 case AVMEDIA_TYPE_DATA: 01012 snprintf(buf, buf_size, "Data: %s", codec_name); 01013 break; 01014 case AVMEDIA_TYPE_SUBTITLE: 01015 snprintf(buf, buf_size, "Subtitle: %s", codec_name); 01016 break; 01017 case AVMEDIA_TYPE_ATTACHMENT: 01018 snprintf(buf, buf_size, "Attachment: %s", codec_name); 01019 break; 01020 default: 01021 snprintf(buf, buf_size, "Invalid Codec type %d", enc->codec_type); 01022 return; 01023 } 01024 if (encode) { 01025 if (enc->flags & CODEC_FLAG_PASS1) 01026 snprintf(buf + strlen(buf), buf_size - strlen(buf), 01027 ", pass 1"); 01028 if (enc->flags & CODEC_FLAG_PASS2) 01029 snprintf(buf + strlen(buf), buf_size - strlen(buf), 01030 ", pass 2"); 01031 } 01032 bitrate = get_bit_rate(enc); 01033 if (bitrate != 0) { 01034 snprintf(buf + strlen(buf), buf_size - strlen(buf), 01035 ", %d kb/s", bitrate / 1000); 01036 } 01037 } 01038 01039 const char *av_get_profile_name(const AVCodec *codec, int profile) 01040 { 01041 const AVProfile *p; 01042 if (profile == FF_PROFILE_UNKNOWN || !codec->profiles) 01043 return NULL; 01044 01045 for (p = codec->profiles; p->profile != FF_PROFILE_UNKNOWN; p++) 01046 if (p->profile == profile) 01047 return p->name; 01048 01049 return NULL; 01050 } 01051 01052 unsigned avcodec_version( void ) 01053 { 01054 return LIBAVCODEC_VERSION_INT; 01055 } 01056 01057 const char *avcodec_configuration(void) 01058 { 01059 return LIBAV_CONFIGURATION; 01060 } 01061 01062 const char *avcodec_license(void) 01063 { 01064 #define LICENSE_PREFIX "libavcodec license: " 01065 return LICENSE_PREFIX LIBAV_LICENSE + sizeof(LICENSE_PREFIX) - 1; 01066 } 01067 01068 void avcodec_init(void) 01069 { 01070 static int initialized = 0; 01071 01072 if (initialized != 0) 01073 return; 01074 initialized = 1; 01075 01076 dsputil_static_init(); 01077 } 01078 01079 void avcodec_flush_buffers(AVCodecContext *avctx) 01080 { 01081 if(HAVE_PTHREADS && avctx->active_thread_type&FF_THREAD_FRAME) 01082 ff_thread_flush(avctx); 01083 else if(avctx->codec->flush) 01084 avctx->codec->flush(avctx); 01085 } 01086 01087 void avcodec_default_free_buffers(AVCodecContext *s){ 01088 int i, j; 01089 01090 if(s->internal_buffer==NULL) return; 01091 01092 if (s->internal_buffer_count) 01093 av_log(s, AV_LOG_WARNING, "Found %i unreleased buffers!\n", s->internal_buffer_count); 01094 for(i=0; i<INTERNAL_BUFFER_SIZE; i++){ 01095 InternalBuffer *buf= &((InternalBuffer*)s->internal_buffer)[i]; 01096 for(j=0; j<4; j++){ 01097 av_freep(&buf->base[j]); 01098 buf->data[j]= NULL; 01099 } 01100 } 01101 av_freep(&s->internal_buffer); 01102 01103 s->internal_buffer_count=0; 01104 } 01105 01106 #if FF_API_OLD_FF_PICT_TYPES 01107 char av_get_pict_type_char(int pict_type){ 01108 return av_get_picture_type_char(pict_type); 01109 } 01110 #endif 01111 01112 int av_get_bits_per_sample(enum CodecID codec_id){ 01113 switch(codec_id){ 01114 case CODEC_ID_ADPCM_SBPRO_2: 01115 return 2; 01116 case CODEC_ID_ADPCM_SBPRO_3: 01117 return 3; 01118 case CODEC_ID_ADPCM_SBPRO_4: 01119 case CODEC_ID_ADPCM_CT: 01120 case CODEC_ID_ADPCM_IMA_WAV: 01121 case CODEC_ID_ADPCM_MS: 01122 case CODEC_ID_ADPCM_YAMAHA: 01123 return 4; 01124 case CODEC_ID_ADPCM_G722: 01125 case CODEC_ID_PCM_ALAW: 01126 case CODEC_ID_PCM_MULAW: 01127 case CODEC_ID_PCM_S8: 01128 case CODEC_ID_PCM_U8: 01129 case CODEC_ID_PCM_ZORK: 01130 return 8; 01131 case CODEC_ID_PCM_S16BE: 01132 case CODEC_ID_PCM_S16LE: 01133 case CODEC_ID_PCM_S16LE_PLANAR: 01134 case CODEC_ID_PCM_U16BE: 01135 case CODEC_ID_PCM_U16LE: 01136 return 16; 01137 case CODEC_ID_PCM_S24DAUD: 01138 case CODEC_ID_PCM_S24BE: 01139 case CODEC_ID_PCM_S24LE: 01140 case CODEC_ID_PCM_U24BE: 01141 case CODEC_ID_PCM_U24LE: 01142 return 24; 01143 case CODEC_ID_PCM_S32BE: 01144 case CODEC_ID_PCM_S32LE: 01145 case CODEC_ID_PCM_U32BE: 01146 case CODEC_ID_PCM_U32LE: 01147 case CODEC_ID_PCM_F32BE: 01148 case CODEC_ID_PCM_F32LE: 01149 return 32; 01150 case CODEC_ID_PCM_F64BE: 01151 case CODEC_ID_PCM_F64LE: 01152 return 64; 01153 default: 01154 return 0; 01155 } 01156 } 01157 01158 #if FF_API_OLD_SAMPLE_FMT 01159 int av_get_bits_per_sample_format(enum AVSampleFormat sample_fmt) { 01160 return av_get_bits_per_sample_fmt(sample_fmt); 01161 } 01162 #endif 01163 01164 #if !HAVE_THREADS 01165 int ff_thread_init(AVCodecContext *s){ 01166 return -1; 01167 } 01168 #endif 01169 01170 unsigned int av_xiphlacing(unsigned char *s, unsigned int v) 01171 { 01172 unsigned int n = 0; 01173 01174 while(v >= 0xff) { 01175 *s++ = 0xff; 01176 v -= 0xff; 01177 n++; 01178 } 01179 *s = v; 01180 n++; 01181 return n; 01182 } 01183 01184 int ff_match_2uint16(const uint16_t (*tab)[2], int size, int a, int b){ 01185 int i; 01186 for(i=0; i<size && !(tab[i][0]==a && tab[i][1]==b); i++); 01187 return i; 01188 } 01189 01190 void av_log_missing_feature(void *avc, const char *feature, int want_sample) 01191 { 01192 av_log(avc, AV_LOG_WARNING, "%s not implemented. Update your Libav " 01193 "version to the newest one from Git. If the problem still " 01194 "occurs, it means that your file has a feature which has not " 01195 "been implemented.\n", feature); 01196 if(want_sample) 01197 av_log_ask_for_sample(avc, NULL); 01198 } 01199 01200 void av_log_ask_for_sample(void *avc, const char *msg, ...) 01201 { 01202 va_list argument_list; 01203 01204 va_start(argument_list, msg); 01205 01206 if (msg) 01207 av_vlog(avc, AV_LOG_WARNING, msg, argument_list); 01208 av_log(avc, AV_LOG_WARNING, "If you want to help, upload a sample " 01209 "of this file to ftp://upload.libav.org/incoming/ " 01210 "and contact the libav-devel mailing list.\n"); 01211 01212 va_end(argument_list); 01213 } 01214 01215 static AVHWAccel *first_hwaccel = NULL; 01216 01217 void av_register_hwaccel(AVHWAccel *hwaccel) 01218 { 01219 AVHWAccel **p = &first_hwaccel; 01220 while (*p) 01221 p = &(*p)->next; 01222 *p = hwaccel; 01223 hwaccel->next = NULL; 01224 } 01225 01226 AVHWAccel *av_hwaccel_next(AVHWAccel *hwaccel) 01227 { 01228 return hwaccel ? hwaccel->next : first_hwaccel; 01229 } 01230 01231 AVHWAccel *ff_find_hwaccel(enum CodecID codec_id, enum PixelFormat pix_fmt) 01232 { 01233 AVHWAccel *hwaccel=NULL; 01234 01235 while((hwaccel= av_hwaccel_next(hwaccel))){ 01236 if ( hwaccel->id == codec_id 01237 && hwaccel->pix_fmt == pix_fmt) 01238 return hwaccel; 01239 } 01240 return NULL; 01241 } 01242 01243 int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op)) 01244 { 01245 if (ff_lockmgr_cb) { 01246 if (ff_lockmgr_cb(&codec_mutex, AV_LOCK_DESTROY)) 01247 return -1; 01248 } 01249 01250 ff_lockmgr_cb = cb; 01251 01252 if (ff_lockmgr_cb) { 01253 if (ff_lockmgr_cb(&codec_mutex, AV_LOCK_CREATE)) 01254 return -1; 01255 } 01256 return 0; 01257 } 01258 01259 unsigned int ff_toupper4(unsigned int x) 01260 { 01261 return toupper( x &0xFF) 01262 + (toupper((x>>8 )&0xFF)<<8 ) 01263 + (toupper((x>>16)&0xFF)<<16) 01264 + (toupper((x>>24)&0xFF)<<24); 01265 } 01266 01267 #if !HAVE_PTHREADS 01268 01269 int ff_thread_get_buffer(AVCodecContext *avctx, AVFrame *f) 01270 { 01271 f->owner = avctx; 01272 return avctx->get_buffer(avctx, f); 01273 } 01274 01275 void ff_thread_release_buffer(AVCodecContext *avctx, AVFrame *f) 01276 { 01277 f->owner->release_buffer(f->owner, f); 01278 } 01279 01280 void ff_thread_finish_setup(AVCodecContext *avctx) 01281 { 01282 } 01283 01284 void ff_thread_report_progress(AVFrame *f, int progress, int field) 01285 { 01286 } 01287 01288 void ff_thread_await_progress(AVFrame *f, int progress, int field) 01289 { 01290 } 01291 01292 #endif 01293 01294 #if FF_API_THREAD_INIT 01295 int avcodec_thread_init(AVCodecContext *s, int thread_count) 01296 { 01297 s->thread_count = thread_count; 01298 return ff_thread_init(s); 01299 } 01300 #endif