Libav 0.7.1
libavcodec/utils.c
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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 "avcodec.h"
00036 #include "dsputil.h"
00037 #include "libavutil/opt.h"
00038 #include "imgconvert.h"
00039 #include "thread.h"
00040 #include "audioconvert.h"
00041 #include "internal.h"
00042 #include <stdlib.h>
00043 #include <stdarg.h>
00044 #include <limits.h>
00045 #include <float.h>
00046 
00047 static int volatile entangled_thread_counter=0;
00048 static int (*ff_lockmgr_cb)(void **mutex, enum AVLockOp op);
00049 static void *codec_mutex;
00050 
00051 void *av_fast_realloc(void *ptr, unsigned int *size, size_t min_size)
00052 {
00053     if(min_size < *size)
00054         return ptr;
00055 
00056     min_size= FFMAX(17*min_size/16 + 32, min_size);
00057 
00058     ptr= av_realloc(ptr, min_size);
00059     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
00060         min_size= 0;
00061 
00062     *size= min_size;
00063 
00064     return ptr;
00065 }
00066 
00067 void av_fast_malloc(void *ptr, unsigned int *size, size_t min_size)
00068 {
00069     void **p = ptr;
00070     if (min_size < *size)
00071         return;
00072     min_size= FFMAX(17*min_size/16 + 32, min_size);
00073     av_free(*p);
00074     *p = av_malloc(min_size);
00075     if (!*p) min_size = 0;
00076     *size= min_size;
00077 }
00078 
00079 /* encoder management */
00080 static AVCodec *first_avcodec = NULL;
00081 
00082 AVCodec *av_codec_next(AVCodec *c){
00083     if(c) return c->next;
00084     else  return first_avcodec;
00085 }
00086 
00087 void avcodec_register(AVCodec *codec)
00088 {
00089     AVCodec **p;
00090     avcodec_init();
00091     p = &first_avcodec;
00092     while (*p != NULL) p = &(*p)->next;
00093     *p = codec;
00094     codec->next = NULL;
00095 }
00096 
00097 unsigned avcodec_get_edge_width(void)
00098 {
00099     return EDGE_WIDTH;
00100 }
00101 
00102 void avcodec_set_dimensions(AVCodecContext *s, int width, int height){
00103     s->coded_width = width;
00104     s->coded_height= height;
00105     s->width = -((-width )>>s->lowres);
00106     s->height= -((-height)>>s->lowres);
00107 }
00108 
00109 typedef struct InternalBuffer{
00110     int last_pic_num;
00111     uint8_t *base[4];
00112     uint8_t *data[4];
00113     int linesize[4];
00114     int width, height;
00115     enum PixelFormat pix_fmt;
00116 }InternalBuffer;
00117 
00118 #define INTERNAL_BUFFER_SIZE (32+1)
00119 
00120 void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height, int linesize_align[4]){
00121     int w_align= 1;
00122     int h_align= 1;
00123 
00124     switch(s->pix_fmt){
00125     case PIX_FMT_YUV420P:
00126     case PIX_FMT_YUYV422:
00127     case PIX_FMT_UYVY422:
00128     case PIX_FMT_YUV422P:
00129     case PIX_FMT_YUV440P:
00130     case PIX_FMT_YUV444P:
00131     case PIX_FMT_GRAY8:
00132     case PIX_FMT_GRAY16BE:
00133     case PIX_FMT_GRAY16LE:
00134     case PIX_FMT_YUVJ420P:
00135     case PIX_FMT_YUVJ422P:
00136     case PIX_FMT_YUVJ440P:
00137     case PIX_FMT_YUVJ444P:
00138     case PIX_FMT_YUVA420P:
00139     case PIX_FMT_YUV420P9LE:
00140     case PIX_FMT_YUV420P9BE:
00141     case PIX_FMT_YUV420P10LE:
00142     case PIX_FMT_YUV420P10BE:
00143     case PIX_FMT_YUV422P10LE:
00144     case PIX_FMT_YUV422P10BE:
00145     case PIX_FMT_YUV444P9LE:
00146     case PIX_FMT_YUV444P9BE:
00147     case PIX_FMT_YUV444P10LE:
00148     case PIX_FMT_YUV444P10BE:
00149         w_align= 16; //FIXME check for non mpeg style codecs and use less alignment
00150         h_align= 16;
00151         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)
00152             h_align= 32; // interlaced is rounded up to 2 MBs
00153         break;
00154     case PIX_FMT_YUV411P:
00155     case PIX_FMT_UYYVYY411:
00156         w_align=32;
00157         h_align=8;
00158         break;
00159     case PIX_FMT_YUV410P:
00160         if(s->codec_id == CODEC_ID_SVQ1){
00161             w_align=64;
00162             h_align=64;
00163         }
00164     case PIX_FMT_RGB555:
00165         if(s->codec_id == CODEC_ID_RPZA){
00166             w_align=4;
00167             h_align=4;
00168         }
00169     case PIX_FMT_PAL8:
00170     case PIX_FMT_BGR8:
00171     case PIX_FMT_RGB8:
00172         if(s->codec_id == CODEC_ID_SMC){
00173             w_align=4;
00174             h_align=4;
00175         }
00176         break;
00177     case PIX_FMT_BGR24:
00178         if((s->codec_id == CODEC_ID_MSZH) || (s->codec_id == CODEC_ID_ZLIB)){
00179             w_align=4;
00180             h_align=4;
00181         }
00182         break;
00183     default:
00184         w_align= 1;
00185         h_align= 1;
00186         break;
00187     }
00188 
00189     *width = FFALIGN(*width , w_align);
00190     *height= FFALIGN(*height, h_align);
00191     if(s->codec_id == CODEC_ID_H264 || s->lowres)
00192         *height+=2; // some of the optimized chroma MC reads one line too much
00193                     // which is also done in mpeg decoders with lowres > 0
00194 
00195     linesize_align[0] =
00196     linesize_align[1] =
00197     linesize_align[2] =
00198     linesize_align[3] = STRIDE_ALIGN;
00199 //STRIDE_ALIGN is 8 for SSE* but this does not work for SVQ1 chroma planes
00200 //we could change STRIDE_ALIGN to 16 for x86/sse but it would increase the
00201 //picture size unneccessarily in some cases. The solution here is not
00202 //pretty and better ideas are welcome!
00203 #if HAVE_MMX
00204     if(s->codec_id == CODEC_ID_SVQ1 || s->codec_id == CODEC_ID_VP5 ||
00205        s->codec_id == CODEC_ID_VP6 || s->codec_id == CODEC_ID_VP6F ||
00206        s->codec_id == CODEC_ID_VP6A) {
00207         linesize_align[0] =
00208         linesize_align[1] =
00209         linesize_align[2] = 16;
00210     }
00211 #endif
00212 }
00213 
00214 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height){
00215     int chroma_shift = av_pix_fmt_descriptors[s->pix_fmt].log2_chroma_w;
00216     int linesize_align[4];
00217     int align;
00218     avcodec_align_dimensions2(s, width, height, linesize_align);
00219     align = FFMAX(linesize_align[0], linesize_align[3]);
00220     linesize_align[1] <<= chroma_shift;
00221     linesize_align[2] <<= chroma_shift;
00222     align = FFMAX3(align, linesize_align[1], linesize_align[2]);
00223     *width=FFALIGN(*width, align);
00224 }
00225 
00226 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic){
00227     int i;
00228     int w= s->width;
00229     int h= s->height;
00230     InternalBuffer *buf;
00231     int *picture_number;
00232 
00233     if(pic->data[0]!=NULL) {
00234         av_log(s, AV_LOG_ERROR, "pic->data[0]!=NULL in avcodec_default_get_buffer\n");
00235         return -1;
00236     }
00237     if(s->internal_buffer_count >= INTERNAL_BUFFER_SIZE) {
00238         av_log(s, AV_LOG_ERROR, "internal_buffer_count overflow (missing release_buffer?)\n");
00239         return -1;
00240     }
00241 
00242     if(av_image_check_size(w, h, 0, s))
00243         return -1;
00244 
00245     if(s->internal_buffer==NULL){
00246         s->internal_buffer= av_mallocz((INTERNAL_BUFFER_SIZE+1)*sizeof(InternalBuffer));
00247     }
00248 #if 0
00249     s->internal_buffer= av_fast_realloc(
00250         s->internal_buffer,
00251         &s->internal_buffer_size,
00252         sizeof(InternalBuffer)*FFMAX(99,  s->internal_buffer_count+1)/*FIXME*/
00253         );
00254 #endif
00255 
00256     buf= &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
00257     picture_number= &(((InternalBuffer*)s->internal_buffer)[INTERNAL_BUFFER_SIZE]).last_pic_num; //FIXME ugly hack
00258     (*picture_number)++;
00259 
00260     if(buf->base[0] && (buf->width != w || buf->height != h || buf->pix_fmt != s->pix_fmt)){
00261         if(s->active_thread_type&FF_THREAD_FRAME) {
00262             av_log_missing_feature(s, "Width/height changing with frame threads is", 0);
00263             return -1;
00264         }
00265 
00266         for(i=0; i<4; i++){
00267             av_freep(&buf->base[i]);
00268             buf->data[i]= NULL;
00269         }
00270     }
00271 
00272     if(buf->base[0]){
00273         pic->age= *picture_number - buf->last_pic_num;
00274         buf->last_pic_num= *picture_number;
00275     }else{
00276         int h_chroma_shift, v_chroma_shift;
00277         int size[4] = {0};
00278         int tmpsize;
00279         int unaligned;
00280         AVPicture picture;
00281         int stride_align[4];
00282         const int pixel_size = av_pix_fmt_descriptors[s->pix_fmt].comp[0].step_minus1+1;
00283 
00284         avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
00285 
00286         avcodec_align_dimensions2(s, &w, &h, stride_align);
00287 
00288         if(!(s->flags&CODEC_FLAG_EMU_EDGE)){
00289             w+= EDGE_WIDTH*2;
00290             h+= EDGE_WIDTH*2;
00291         }
00292 
00293         do {
00294             // NOTE: do not align linesizes individually, this breaks e.g. assumptions
00295             // that linesize[0] == 2*linesize[1] in the MPEG-encoder for 4:2:2
00296             av_image_fill_linesizes(picture.linesize, s->pix_fmt, w);
00297             // increase alignment of w for next try (rhs gives the lowest bit set in w)
00298             w += w & ~(w-1);
00299 
00300             unaligned = 0;
00301             for (i=0; i<4; i++){
00302                 unaligned |= picture.linesize[i] % stride_align[i];
00303             }
00304         } while (unaligned);
00305 
00306         tmpsize = av_image_fill_pointers(picture.data, s->pix_fmt, h, NULL, picture.linesize);
00307         if (tmpsize < 0)
00308             return -1;
00309 
00310         for (i=0; i<3 && picture.data[i+1]; i++)
00311             size[i] = picture.data[i+1] - picture.data[i];
00312         size[i] = tmpsize - (picture.data[i] - picture.data[0]);
00313 
00314         buf->last_pic_num= -256*256*256*64;
00315         memset(buf->base, 0, sizeof(buf->base));
00316         memset(buf->data, 0, sizeof(buf->data));
00317 
00318         for(i=0; i<4 && size[i]; i++){
00319             const int h_shift= i==0 ? 0 : h_chroma_shift;
00320             const int v_shift= i==0 ? 0 : v_chroma_shift;
00321 
00322             buf->linesize[i]= picture.linesize[i];
00323 
00324             buf->base[i]= av_malloc(size[i]+16); //FIXME 16
00325             if(buf->base[i]==NULL) return -1;
00326             memset(buf->base[i], 128, size[i]);
00327 
00328             // no edge if EDGE EMU or not planar YUV
00329             if((s->flags&CODEC_FLAG_EMU_EDGE) || !size[2])
00330                 buf->data[i] = buf->base[i];
00331             else
00332                 buf->data[i] = buf->base[i] + FFALIGN((buf->linesize[i]*EDGE_WIDTH>>v_shift) + (pixel_size*EDGE_WIDTH>>h_shift), stride_align[i]);
00333         }
00334         if(size[1] && !size[2])
00335             ff_set_systematic_pal2((uint32_t*)buf->data[1], s->pix_fmt);
00336         buf->width  = s->width;
00337         buf->height = s->height;
00338         buf->pix_fmt= s->pix_fmt;
00339         pic->age= 256*256*256*64;
00340     }
00341     pic->type= FF_BUFFER_TYPE_INTERNAL;
00342 
00343     for(i=0; i<4; i++){
00344         pic->base[i]= buf->base[i];
00345         pic->data[i]= buf->data[i];
00346         pic->linesize[i]= buf->linesize[i];
00347     }
00348     s->internal_buffer_count++;
00349 
00350     if(s->pkt) pic->pkt_pts= s->pkt->pts;
00351     else       pic->pkt_pts= AV_NOPTS_VALUE;
00352     pic->reordered_opaque= s->reordered_opaque;
00353 
00354     if(s->debug&FF_DEBUG_BUFFERS)
00355         av_log(s, AV_LOG_DEBUG, "default_get_buffer called on pic %p, %d buffers used\n", pic, s->internal_buffer_count);
00356 
00357     return 0;
00358 }
00359 
00360 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic){
00361     int i;
00362     InternalBuffer *buf, *last;
00363 
00364     assert(pic->type==FF_BUFFER_TYPE_INTERNAL);
00365     assert(s->internal_buffer_count);
00366 
00367     if(s->internal_buffer){
00368     buf = NULL; /* avoids warning */
00369     for(i=0; i<s->internal_buffer_count; i++){ //just 3-5 checks so is not worth to optimize
00370         buf= &((InternalBuffer*)s->internal_buffer)[i];
00371         if(buf->data[0] == pic->data[0])
00372             break;
00373     }
00374     assert(i < s->internal_buffer_count);
00375     s->internal_buffer_count--;
00376     last = &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
00377 
00378     FFSWAP(InternalBuffer, *buf, *last);
00379     }
00380 
00381     for(i=0; i<4; i++){
00382         pic->data[i]=NULL;
00383 //        pic->base[i]=NULL;
00384     }
00385 //printf("R%X\n", pic->opaque);
00386 
00387     if(s->debug&FF_DEBUG_BUFFERS)
00388         av_log(s, AV_LOG_DEBUG, "default_release_buffer called on pic %p, %d buffers used\n", pic, s->internal_buffer_count);
00389 }
00390 
00391 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic){
00392     AVFrame temp_pic;
00393     int i;
00394 
00395     /* If no picture return a new buffer */
00396     if(pic->data[0] == NULL) {
00397         /* We will copy from buffer, so must be readable */
00398         pic->buffer_hints |= FF_BUFFER_HINTS_READABLE;
00399         return s->get_buffer(s, pic);
00400     }
00401 
00402     /* If internal buffer type return the same buffer */
00403     if(pic->type == FF_BUFFER_TYPE_INTERNAL) {
00404         if(s->pkt) pic->pkt_pts= s->pkt->pts;
00405         else       pic->pkt_pts= AV_NOPTS_VALUE;
00406         pic->reordered_opaque= s->reordered_opaque;
00407         return 0;
00408     }
00409 
00410     /*
00411      * Not internal type and reget_buffer not overridden, emulate cr buffer
00412      */
00413     temp_pic = *pic;
00414     for(i = 0; i < 4; i++)
00415         pic->data[i] = pic->base[i] = NULL;
00416     pic->opaque = NULL;
00417     /* Allocate new frame */
00418     if (s->get_buffer(s, pic))
00419         return -1;
00420     /* Copy image data from old buffer to new buffer */
00421     av_picture_copy((AVPicture*)pic, (AVPicture*)&temp_pic, s->pix_fmt, s->width,
00422              s->height);
00423     s->release_buffer(s, &temp_pic); // Release old frame
00424     return 0;
00425 }
00426 
00427 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size){
00428     int i;
00429 
00430     for(i=0; i<count; i++){
00431         int r= func(c, (char*)arg + i*size);
00432         if(ret) ret[i]= r;
00433     }
00434     return 0;
00435 }
00436 
00437 int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int jobnr, int threadnr),void *arg, int *ret, int count){
00438     int i;
00439 
00440     for(i=0; i<count; i++){
00441         int r= func(c, arg, i, 0);
00442         if(ret) ret[i]= r;
00443     }
00444     return 0;
00445 }
00446 
00447 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat *fmt){
00448     while (*fmt != PIX_FMT_NONE && ff_is_hwaccel_pix_fmt(*fmt))
00449         ++fmt;
00450     return fmt[0];
00451 }
00452 
00453 void avcodec_get_frame_defaults(AVFrame *pic){
00454     memset(pic, 0, sizeof(AVFrame));
00455 
00456     pic->pts= AV_NOPTS_VALUE;
00457     pic->key_frame= 1;
00458 }
00459 
00460 AVFrame *avcodec_alloc_frame(void){
00461     AVFrame *pic= av_malloc(sizeof(AVFrame));
00462 
00463     if(pic==NULL) return NULL;
00464 
00465     avcodec_get_frame_defaults(pic);
00466 
00467     return pic;
00468 }
00469 
00470 int attribute_align_arg avcodec_open(AVCodecContext *avctx, AVCodec *codec)
00471 {
00472     int ret = 0;
00473 
00474     /* If there is a user-supplied mutex locking routine, call it. */
00475     if (ff_lockmgr_cb) {
00476         if ((*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
00477             return -1;
00478     }
00479 
00480     entangled_thread_counter++;
00481     if(entangled_thread_counter != 1){
00482         av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
00483         ret = -1;
00484         goto end;
00485     }
00486 
00487     if(avctx->codec || !codec) {
00488         ret = AVERROR(EINVAL);
00489         goto end;
00490     }
00491 
00492     if (codec->priv_data_size > 0) {
00493       if(!avctx->priv_data){
00494         avctx->priv_data = av_mallocz(codec->priv_data_size);
00495         if (!avctx->priv_data) {
00496             ret = AVERROR(ENOMEM);
00497             goto end;
00498         }
00499         if(codec->priv_class){ //this can be droped once all user apps use   avcodec_get_context_defaults3()
00500             *(AVClass**)avctx->priv_data= codec->priv_class;
00501             av_opt_set_defaults(avctx->priv_data);
00502         }
00503       }
00504     } else {
00505         avctx->priv_data = NULL;
00506     }
00507 
00508     if(avctx->coded_width && avctx->coded_height)
00509         avcodec_set_dimensions(avctx, avctx->coded_width, avctx->coded_height);
00510     else if(avctx->width && avctx->height)
00511         avcodec_set_dimensions(avctx, avctx->width, avctx->height);
00512 
00513     if ((avctx->coded_width || avctx->coded_height || avctx->width || avctx->height)
00514         && (  av_image_check_size(avctx->coded_width, avctx->coded_height, 0, avctx) < 0
00515            || av_image_check_size(avctx->width,       avctx->height,       0, avctx) < 0)) {
00516         av_log(avctx, AV_LOG_WARNING, "ignoring invalid width/height values\n");
00517         avcodec_set_dimensions(avctx, 0, 0);
00518     }
00519 
00520     /* if the decoder init function was already called previously,
00521        free the already allocated subtitle_header before overwriting it */
00522     if (codec->decode)
00523         av_freep(&avctx->subtitle_header);
00524 
00525 #define SANE_NB_CHANNELS 128U
00526     if (avctx->channels > SANE_NB_CHANNELS) {
00527         ret = AVERROR(EINVAL);
00528         goto free_and_end;
00529     }
00530 
00531     avctx->codec = codec;
00532     if ((avctx->codec_type == AVMEDIA_TYPE_UNKNOWN || avctx->codec_type == codec->type) &&
00533         avctx->codec_id == CODEC_ID_NONE) {
00534         avctx->codec_type = codec->type;
00535         avctx->codec_id   = codec->id;
00536     }
00537     if (avctx->codec_id != codec->id || (avctx->codec_type != codec->type
00538                            && avctx->codec_type != AVMEDIA_TYPE_ATTACHMENT)) {
00539         av_log(avctx, AV_LOG_ERROR, "codec type or id mismatches\n");
00540         ret = AVERROR(EINVAL);
00541         goto free_and_end;
00542     }
00543     avctx->frame_number = 0;
00544 
00545     if (HAVE_THREADS && !avctx->thread_opaque) {
00546         ret = ff_thread_init(avctx);
00547         if (ret < 0) {
00548             goto free_and_end;
00549         }
00550     }
00551 
00552     if (avctx->codec->max_lowres < avctx->lowres) {
00553         av_log(avctx, AV_LOG_ERROR, "The maximum value for lowres supported by the decoder is %d\n",
00554                avctx->codec->max_lowres);
00555         ret = AVERROR(EINVAL);
00556         goto free_and_end;
00557     }
00558     if (avctx->codec->encode) {
00559         int i;
00560         if (avctx->codec->sample_fmts) {
00561             for (i = 0; avctx->codec->sample_fmts[i] != AV_SAMPLE_FMT_NONE; i++)
00562                 if (avctx->sample_fmt == avctx->codec->sample_fmts[i])
00563                     break;
00564             if (avctx->codec->sample_fmts[i] == AV_SAMPLE_FMT_NONE) {
00565                 av_log(avctx, AV_LOG_ERROR, "Specified sample_fmt is not supported.\n");
00566                 ret = AVERROR(EINVAL);
00567                 goto free_and_end;
00568             }
00569         }
00570         if (avctx->codec->supported_samplerates) {
00571             for (i = 0; avctx->codec->supported_samplerates[i] != 0; i++)
00572                 if (avctx->sample_rate == avctx->codec->supported_samplerates[i])
00573                     break;
00574             if (avctx->codec->supported_samplerates[i] == 0) {
00575                 av_log(avctx, AV_LOG_ERROR, "Specified sample_rate is not supported\n");
00576                 ret = AVERROR(EINVAL);
00577                 goto free_and_end;
00578             }
00579         }
00580         if (avctx->codec->channel_layouts) {
00581             if (!avctx->channel_layout) {
00582                 av_log(avctx, AV_LOG_WARNING, "channel_layout not specified\n");
00583             } else {
00584                 for (i = 0; avctx->codec->channel_layouts[i] != 0; i++)
00585                     if (avctx->channel_layout == avctx->codec->channel_layouts[i])
00586                         break;
00587                 if (avctx->codec->channel_layouts[i] == 0) {
00588                     av_log(avctx, AV_LOG_ERROR, "Specified channel_layout is not supported\n");
00589                     ret = AVERROR(EINVAL);
00590                     goto free_and_end;
00591                 }
00592             }
00593         }
00594         if (avctx->channel_layout && avctx->channels) {
00595             if (av_get_channel_layout_nb_channels(avctx->channel_layout) != avctx->channels) {
00596                 av_log(avctx, AV_LOG_ERROR, "channel layout does not match number of channels\n");
00597                 ret = AVERROR(EINVAL);
00598                 goto free_and_end;
00599             }
00600         } else if (avctx->channel_layout) {
00601             avctx->channels = av_get_channel_layout_nb_channels(avctx->channel_layout);
00602         }
00603     }
00604 
00605     if(avctx->codec->init && !(avctx->active_thread_type&FF_THREAD_FRAME)){
00606         ret = avctx->codec->init(avctx);
00607         if (ret < 0) {
00608             goto free_and_end;
00609         }
00610     }
00611 end:
00612     entangled_thread_counter--;
00613 
00614     /* Release any user-supplied mutex. */
00615     if (ff_lockmgr_cb) {
00616         (*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
00617     }
00618     return ret;
00619 free_and_end:
00620     av_freep(&avctx->priv_data);
00621     avctx->codec= NULL;
00622     goto end;
00623 }
00624 
00625 int attribute_align_arg avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
00626                          const short *samples)
00627 {
00628     if(buf_size < FF_MIN_BUFFER_SIZE && 0){
00629         av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
00630         return -1;
00631     }
00632     if((avctx->codec->capabilities & CODEC_CAP_DELAY) || samples){
00633         int ret = avctx->codec->encode(avctx, buf, buf_size, samples);
00634         avctx->frame_number++;
00635         return ret;
00636     }else
00637         return 0;
00638 }
00639 
00640 int attribute_align_arg avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
00641                          const AVFrame *pict)
00642 {
00643     if(buf_size < FF_MIN_BUFFER_SIZE){
00644         av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
00645         return -1;
00646     }
00647     if(av_image_check_size(avctx->width, avctx->height, 0, avctx))
00648         return -1;
00649     if((avctx->codec->capabilities & CODEC_CAP_DELAY) || pict){
00650         int ret = avctx->codec->encode(avctx, buf, buf_size, pict);
00651         avctx->frame_number++;
00652         emms_c(); //needed to avoid an emms_c() call before every return;
00653 
00654         return ret;
00655     }else
00656         return 0;
00657 }
00658 
00659 int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
00660                             const AVSubtitle *sub)
00661 {
00662     int ret;
00663     if(sub->start_display_time) {
00664         av_log(avctx, AV_LOG_ERROR, "start_display_time must be 0.\n");
00665         return -1;
00666     }
00667     if(sub->num_rects == 0 || !sub->rects)
00668         return -1;
00669     ret = avctx->codec->encode(avctx, buf, buf_size, sub);
00670     avctx->frame_number++;
00671     return ret;
00672 }
00673 
00674 int attribute_align_arg avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
00675                          int *got_picture_ptr,
00676                          AVPacket *avpkt)
00677 {
00678     int ret;
00679 
00680     *got_picture_ptr= 0;
00681     if((avctx->coded_width||avctx->coded_height) && av_image_check_size(avctx->coded_width, avctx->coded_height, 0, avctx))
00682         return -1;
00683 
00684     avctx->pkt = avpkt;
00685 
00686     if((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size || (avctx->active_thread_type&FF_THREAD_FRAME)){
00687         if (HAVE_PTHREADS && avctx->active_thread_type&FF_THREAD_FRAME)
00688              ret = ff_thread_decode_frame(avctx, picture, got_picture_ptr,
00689                                           avpkt);
00690         else {
00691             ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
00692                               avpkt);
00693             picture->pkt_dts= avpkt->dts;
00694         }
00695 
00696         emms_c(); //needed to avoid an emms_c() call before every return;
00697 
00698         if (*got_picture_ptr)
00699             avctx->frame_number++;
00700     }else
00701         ret= 0;
00702 
00703     return ret;
00704 }
00705 
00706 int attribute_align_arg avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples,
00707                          int *frame_size_ptr,
00708                          AVPacket *avpkt)
00709 {
00710     int ret;
00711 
00712     avctx->pkt = avpkt;
00713 
00714     if((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size){
00715         //FIXME remove the check below _after_ ensuring that all audio check that the available space is enough
00716         if(*frame_size_ptr < AVCODEC_MAX_AUDIO_FRAME_SIZE){
00717             av_log(avctx, AV_LOG_ERROR, "buffer smaller than AVCODEC_MAX_AUDIO_FRAME_SIZE\n");
00718             return -1;
00719         }
00720         if(*frame_size_ptr < FF_MIN_BUFFER_SIZE ||
00721         *frame_size_ptr < avctx->channels * avctx->frame_size * sizeof(int16_t)){
00722             av_log(avctx, AV_LOG_ERROR, "buffer %d too small\n", *frame_size_ptr);
00723             return -1;
00724         }
00725 
00726         ret = avctx->codec->decode(avctx, samples, frame_size_ptr, avpkt);
00727         avctx->frame_number++;
00728     }else{
00729         ret= 0;
00730         *frame_size_ptr=0;
00731     }
00732     return ret;
00733 }
00734 
00735 int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
00736                             int *got_sub_ptr,
00737                             AVPacket *avpkt)
00738 {
00739     int ret;
00740 
00741     avctx->pkt = avpkt;
00742     *got_sub_ptr = 0;
00743     ret = avctx->codec->decode(avctx, sub, got_sub_ptr, avpkt);
00744     if (*got_sub_ptr)
00745         avctx->frame_number++;
00746     return ret;
00747 }
00748 
00749 void avsubtitle_free(AVSubtitle *sub)
00750 {
00751     int i;
00752 
00753     for (i = 0; i < sub->num_rects; i++)
00754     {
00755         av_freep(&sub->rects[i]->pict.data[0]);
00756         av_freep(&sub->rects[i]->pict.data[1]);
00757         av_freep(&sub->rects[i]->pict.data[2]);
00758         av_freep(&sub->rects[i]->pict.data[3]);
00759         av_freep(&sub->rects[i]->text);
00760         av_freep(&sub->rects[i]->ass);
00761         av_freep(&sub->rects[i]);
00762     }
00763 
00764     av_freep(&sub->rects);
00765 
00766     memset(sub, 0, sizeof(AVSubtitle));
00767 }
00768 
00769 av_cold int avcodec_close(AVCodecContext *avctx)
00770 {
00771     /* If there is a user-supplied mutex locking routine, call it. */
00772     if (ff_lockmgr_cb) {
00773         if ((*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
00774             return -1;
00775     }
00776 
00777     entangled_thread_counter++;
00778     if(entangled_thread_counter != 1){
00779         av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
00780         entangled_thread_counter--;
00781         return -1;
00782     }
00783 
00784     if (HAVE_THREADS && avctx->thread_opaque)
00785         ff_thread_free(avctx);
00786     if (avctx->codec && avctx->codec->close)
00787         avctx->codec->close(avctx);
00788     avcodec_default_free_buffers(avctx);
00789     avctx->coded_frame = NULL;
00790     if (avctx->codec && avctx->codec->priv_class)
00791         av_opt_free(avctx->priv_data);
00792     av_opt_free(avctx);
00793     av_freep(&avctx->priv_data);
00794     if(avctx->codec && avctx->codec->encode)
00795         av_freep(&avctx->extradata);
00796     avctx->codec = NULL;
00797     avctx->active_thread_type = 0;
00798     entangled_thread_counter--;
00799 
00800     /* Release any user-supplied mutex. */
00801     if (ff_lockmgr_cb) {
00802         (*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
00803     }
00804     return 0;
00805 }
00806 
00807 AVCodec *avcodec_find_encoder(enum CodecID id)
00808 {
00809     AVCodec *p, *experimental=NULL;
00810     p = first_avcodec;
00811     while (p) {
00812         if (p->encode != NULL && p->id == id) {
00813             if (p->capabilities & CODEC_CAP_EXPERIMENTAL && !experimental) {
00814                 experimental = p;
00815             } else
00816                 return p;
00817         }
00818         p = p->next;
00819     }
00820     return experimental;
00821 }
00822 
00823 AVCodec *avcodec_find_encoder_by_name(const char *name)
00824 {
00825     AVCodec *p;
00826     if (!name)
00827         return NULL;
00828     p = first_avcodec;
00829     while (p) {
00830         if (p->encode != NULL && strcmp(name,p->name) == 0)
00831             return p;
00832         p = p->next;
00833     }
00834     return NULL;
00835 }
00836 
00837 AVCodec *avcodec_find_decoder(enum CodecID id)
00838 {
00839     AVCodec *p;
00840     p = first_avcodec;
00841     while (p) {
00842         if (p->decode != NULL && p->id == id)
00843             return p;
00844         p = p->next;
00845     }
00846     return NULL;
00847 }
00848 
00849 AVCodec *avcodec_find_decoder_by_name(const char *name)
00850 {
00851     AVCodec *p;
00852     if (!name)
00853         return NULL;
00854     p = first_avcodec;
00855     while (p) {
00856         if (p->decode != NULL && strcmp(name,p->name) == 0)
00857             return p;
00858         p = p->next;
00859     }
00860     return NULL;
00861 }
00862 
00863 static int get_bit_rate(AVCodecContext *ctx)
00864 {
00865     int bit_rate;
00866     int bits_per_sample;
00867 
00868     switch(ctx->codec_type) {
00869     case AVMEDIA_TYPE_VIDEO:
00870     case AVMEDIA_TYPE_DATA:
00871     case AVMEDIA_TYPE_SUBTITLE:
00872     case AVMEDIA_TYPE_ATTACHMENT:
00873         bit_rate = ctx->bit_rate;
00874         break;
00875     case AVMEDIA_TYPE_AUDIO:
00876         bits_per_sample = av_get_bits_per_sample(ctx->codec_id);
00877         bit_rate = bits_per_sample ? ctx->sample_rate * ctx->channels * bits_per_sample : ctx->bit_rate;
00878         break;
00879     default:
00880         bit_rate = 0;
00881         break;
00882     }
00883     return bit_rate;
00884 }
00885 
00886 size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag)
00887 {
00888     int i, len, ret = 0;
00889 
00890     for (i = 0; i < 4; i++) {
00891         len = snprintf(buf, buf_size,
00892                        isprint(codec_tag&0xFF) ? "%c" : "[%d]", codec_tag&0xFF);
00893         buf      += len;
00894         buf_size  = buf_size > len ? buf_size - len : 0;
00895         ret      += len;
00896         codec_tag>>=8;
00897     }
00898     return ret;
00899 }
00900 
00901 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
00902 {
00903     const char *codec_name;
00904     const char *profile = NULL;
00905     AVCodec *p;
00906     char buf1[32];
00907     int bitrate;
00908     AVRational display_aspect_ratio;
00909 
00910     if (encode)
00911         p = avcodec_find_encoder(enc->codec_id);
00912     else
00913         p = avcodec_find_decoder(enc->codec_id);
00914 
00915     if (p) {
00916         codec_name = p->name;
00917         profile = av_get_profile_name(p, enc->profile);
00918     } else if (enc->codec_id == CODEC_ID_MPEG2TS) {
00919         /* fake mpeg2 transport stream codec (currently not
00920            registered) */
00921         codec_name = "mpeg2ts";
00922     } else if (enc->codec_name[0] != '\0') {
00923         codec_name = enc->codec_name;
00924     } else {
00925         /* output avi tags */
00926         char tag_buf[32];
00927         av_get_codec_tag_string(tag_buf, sizeof(tag_buf), enc->codec_tag);
00928         snprintf(buf1, sizeof(buf1), "%s / 0x%04X", tag_buf, enc->codec_tag);
00929         codec_name = buf1;
00930     }
00931 
00932     switch(enc->codec_type) {
00933     case AVMEDIA_TYPE_VIDEO:
00934         snprintf(buf, buf_size,
00935                  "Video: %s%s",
00936                  codec_name, enc->mb_decision ? " (hq)" : "");
00937         if (profile)
00938             snprintf(buf + strlen(buf), buf_size - strlen(buf),
00939                      " (%s)", profile);
00940         if (enc->pix_fmt != PIX_FMT_NONE) {
00941             snprintf(buf + strlen(buf), buf_size - strlen(buf),
00942                      ", %s",
00943                      av_get_pix_fmt_name(enc->pix_fmt));
00944         }
00945         if (enc->width) {
00946             snprintf(buf + strlen(buf), buf_size - strlen(buf),
00947                      ", %dx%d",
00948                      enc->width, enc->height);
00949             if (enc->sample_aspect_ratio.num) {
00950                 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
00951                           enc->width*enc->sample_aspect_ratio.num,
00952                           enc->height*enc->sample_aspect_ratio.den,
00953                           1024*1024);
00954                 snprintf(buf + strlen(buf), buf_size - strlen(buf),
00955                          " [PAR %d:%d DAR %d:%d]",
00956                          enc->sample_aspect_ratio.num, enc->sample_aspect_ratio.den,
00957                          display_aspect_ratio.num, display_aspect_ratio.den);
00958             }
00959             if(av_log_get_level() >= AV_LOG_DEBUG){
00960                 int g= av_gcd(enc->time_base.num, enc->time_base.den);
00961                 snprintf(buf + strlen(buf), buf_size - strlen(buf),
00962                      ", %d/%d",
00963                      enc->time_base.num/g, enc->time_base.den/g);
00964             }
00965         }
00966         if (encode) {
00967             snprintf(buf + strlen(buf), buf_size - strlen(buf),
00968                      ", q=%d-%d", enc->qmin, enc->qmax);
00969         }
00970         break;
00971     case AVMEDIA_TYPE_AUDIO:
00972         snprintf(buf, buf_size,
00973                  "Audio: %s",
00974                  codec_name);
00975         if (profile)
00976             snprintf(buf + strlen(buf), buf_size - strlen(buf),
00977                      " (%s)", profile);
00978         if (enc->sample_rate) {
00979             snprintf(buf + strlen(buf), buf_size - strlen(buf),
00980                      ", %d Hz", enc->sample_rate);
00981         }
00982         av_strlcat(buf, ", ", buf_size);
00983         av_get_channel_layout_string(buf + strlen(buf), buf_size - strlen(buf), enc->channels, enc->channel_layout);
00984         if (enc->sample_fmt != AV_SAMPLE_FMT_NONE) {
00985             snprintf(buf + strlen(buf), buf_size - strlen(buf),
00986                      ", %s", av_get_sample_fmt_name(enc->sample_fmt));
00987         }
00988         break;
00989     case AVMEDIA_TYPE_DATA:
00990         snprintf(buf, buf_size, "Data: %s", codec_name);
00991         break;
00992     case AVMEDIA_TYPE_SUBTITLE:
00993         snprintf(buf, buf_size, "Subtitle: %s", codec_name);
00994         break;
00995     case AVMEDIA_TYPE_ATTACHMENT:
00996         snprintf(buf, buf_size, "Attachment: %s", codec_name);
00997         break;
00998     default:
00999         snprintf(buf, buf_size, "Invalid Codec type %d", enc->codec_type);
01000         return;
01001     }
01002     if (encode) {
01003         if (enc->flags & CODEC_FLAG_PASS1)
01004             snprintf(buf + strlen(buf), buf_size - strlen(buf),
01005                      ", pass 1");
01006         if (enc->flags & CODEC_FLAG_PASS2)
01007             snprintf(buf + strlen(buf), buf_size - strlen(buf),
01008                      ", pass 2");
01009     }
01010     bitrate = get_bit_rate(enc);
01011     if (bitrate != 0) {
01012         snprintf(buf + strlen(buf), buf_size - strlen(buf),
01013                  ", %d kb/s", bitrate / 1000);
01014     }
01015 }
01016 
01017 const char *av_get_profile_name(const AVCodec *codec, int profile)
01018 {
01019     const AVProfile *p;
01020     if (profile == FF_PROFILE_UNKNOWN || !codec->profiles)
01021         return NULL;
01022 
01023     for (p = codec->profiles; p->profile != FF_PROFILE_UNKNOWN; p++)
01024         if (p->profile == profile)
01025             return p->name;
01026 
01027     return NULL;
01028 }
01029 
01030 unsigned avcodec_version( void )
01031 {
01032   return LIBAVCODEC_VERSION_INT;
01033 }
01034 
01035 const char *avcodec_configuration(void)
01036 {
01037     return LIBAV_CONFIGURATION;
01038 }
01039 
01040 const char *avcodec_license(void)
01041 {
01042 #define LICENSE_PREFIX "libavcodec license: "
01043     return LICENSE_PREFIX LIBAV_LICENSE + sizeof(LICENSE_PREFIX) - 1;
01044 }
01045 
01046 void avcodec_init(void)
01047 {
01048     static int initialized = 0;
01049 
01050     if (initialized != 0)
01051         return;
01052     initialized = 1;
01053 
01054     dsputil_static_init();
01055 }
01056 
01057 void avcodec_flush_buffers(AVCodecContext *avctx)
01058 {
01059     if(HAVE_PTHREADS && avctx->active_thread_type&FF_THREAD_FRAME)
01060         ff_thread_flush(avctx);
01061     else if(avctx->codec->flush)
01062         avctx->codec->flush(avctx);
01063 }
01064 
01065 void avcodec_default_free_buffers(AVCodecContext *s){
01066     int i, j;
01067 
01068     if(s->internal_buffer==NULL) return;
01069 
01070     if (s->internal_buffer_count)
01071         av_log(s, AV_LOG_WARNING, "Found %i unreleased buffers!\n", s->internal_buffer_count);
01072     for(i=0; i<INTERNAL_BUFFER_SIZE; i++){
01073         InternalBuffer *buf= &((InternalBuffer*)s->internal_buffer)[i];
01074         for(j=0; j<4; j++){
01075             av_freep(&buf->base[j]);
01076             buf->data[j]= NULL;
01077         }
01078     }
01079     av_freep(&s->internal_buffer);
01080 
01081     s->internal_buffer_count=0;
01082 }
01083 
01084 #if FF_API_OLD_FF_PICT_TYPES
01085 char av_get_pict_type_char(int pict_type){
01086     return av_get_picture_type_char(pict_type);
01087 }
01088 #endif
01089 
01090 int av_get_bits_per_sample(enum CodecID codec_id){
01091     switch(codec_id){
01092     case CODEC_ID_ADPCM_SBPRO_2:
01093         return 2;
01094     case CODEC_ID_ADPCM_SBPRO_3:
01095         return 3;
01096     case CODEC_ID_ADPCM_SBPRO_4:
01097     case CODEC_ID_ADPCM_CT:
01098     case CODEC_ID_ADPCM_IMA_WAV:
01099     case CODEC_ID_ADPCM_MS:
01100     case CODEC_ID_ADPCM_YAMAHA:
01101         return 4;
01102     case CODEC_ID_ADPCM_G722:
01103     case CODEC_ID_PCM_ALAW:
01104     case CODEC_ID_PCM_MULAW:
01105     case CODEC_ID_PCM_S8:
01106     case CODEC_ID_PCM_U8:
01107     case CODEC_ID_PCM_ZORK:
01108         return 8;
01109     case CODEC_ID_PCM_S16BE:
01110     case CODEC_ID_PCM_S16LE:
01111     case CODEC_ID_PCM_S16LE_PLANAR:
01112     case CODEC_ID_PCM_U16BE:
01113     case CODEC_ID_PCM_U16LE:
01114         return 16;
01115     case CODEC_ID_PCM_S24DAUD:
01116     case CODEC_ID_PCM_S24BE:
01117     case CODEC_ID_PCM_S24LE:
01118     case CODEC_ID_PCM_U24BE:
01119     case CODEC_ID_PCM_U24LE:
01120         return 24;
01121     case CODEC_ID_PCM_S32BE:
01122     case CODEC_ID_PCM_S32LE:
01123     case CODEC_ID_PCM_U32BE:
01124     case CODEC_ID_PCM_U32LE:
01125     case CODEC_ID_PCM_F32BE:
01126     case CODEC_ID_PCM_F32LE:
01127         return 32;
01128     case CODEC_ID_PCM_F64BE:
01129     case CODEC_ID_PCM_F64LE:
01130         return 64;
01131     default:
01132         return 0;
01133     }
01134 }
01135 
01136 #if FF_API_OLD_SAMPLE_FMT
01137 int av_get_bits_per_sample_format(enum AVSampleFormat sample_fmt) {
01138     return av_get_bits_per_sample_fmt(sample_fmt);
01139 }
01140 #endif
01141 
01142 #if !HAVE_THREADS
01143 int ff_thread_init(AVCodecContext *s){
01144     return -1;
01145 }
01146 #endif
01147 
01148 unsigned int av_xiphlacing(unsigned char *s, unsigned int v)
01149 {
01150     unsigned int n = 0;
01151 
01152     while(v >= 0xff) {
01153         *s++ = 0xff;
01154         v -= 0xff;
01155         n++;
01156     }
01157     *s = v;
01158     n++;
01159     return n;
01160 }
01161 
01162 int ff_match_2uint16(const uint16_t (*tab)[2], int size, int a, int b){
01163     int i;
01164     for(i=0; i<size && !(tab[i][0]==a && tab[i][1]==b); i++);
01165     return i;
01166 }
01167 
01168 void av_log_missing_feature(void *avc, const char *feature, int want_sample)
01169 {
01170     av_log(avc, AV_LOG_WARNING, "%s not implemented. Update your Libav "
01171             "version to the newest one from Git. If the problem still "
01172             "occurs, it means that your file has a feature which has not "
01173             "been implemented.\n", feature);
01174     if(want_sample)
01175         av_log_ask_for_sample(avc, NULL);
01176 }
01177 
01178 void av_log_ask_for_sample(void *avc, const char *msg, ...)
01179 {
01180     va_list argument_list;
01181 
01182     va_start(argument_list, msg);
01183 
01184     if (msg)
01185         av_vlog(avc, AV_LOG_WARNING, msg, argument_list);
01186     av_log(avc, AV_LOG_WARNING, "If you want to help, upload a sample "
01187             "of this file to ftp://upload.libav.org/incoming/ "
01188             "and contact the libav-devel mailing list.\n");
01189 
01190     va_end(argument_list);
01191 }
01192 
01193 static AVHWAccel *first_hwaccel = NULL;
01194 
01195 void av_register_hwaccel(AVHWAccel *hwaccel)
01196 {
01197     AVHWAccel **p = &first_hwaccel;
01198     while (*p)
01199         p = &(*p)->next;
01200     *p = hwaccel;
01201     hwaccel->next = NULL;
01202 }
01203 
01204 AVHWAccel *av_hwaccel_next(AVHWAccel *hwaccel)
01205 {
01206     return hwaccel ? hwaccel->next : first_hwaccel;
01207 }
01208 
01209 AVHWAccel *ff_find_hwaccel(enum CodecID codec_id, enum PixelFormat pix_fmt)
01210 {
01211     AVHWAccel *hwaccel=NULL;
01212 
01213     while((hwaccel= av_hwaccel_next(hwaccel))){
01214         if (   hwaccel->id      == codec_id
01215             && hwaccel->pix_fmt == pix_fmt)
01216             return hwaccel;
01217     }
01218     return NULL;
01219 }
01220 
01221 int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op))
01222 {
01223     if (ff_lockmgr_cb) {
01224         if (ff_lockmgr_cb(&codec_mutex, AV_LOCK_DESTROY))
01225             return -1;
01226     }
01227 
01228     ff_lockmgr_cb = cb;
01229 
01230     if (ff_lockmgr_cb) {
01231         if (ff_lockmgr_cb(&codec_mutex, AV_LOCK_CREATE))
01232             return -1;
01233     }
01234     return 0;
01235 }
01236 
01237 unsigned int ff_toupper4(unsigned int x)
01238 {
01239     return     toupper( x     &0xFF)
01240             + (toupper((x>>8 )&0xFF)<<8 )
01241             + (toupper((x>>16)&0xFF)<<16)
01242             + (toupper((x>>24)&0xFF)<<24);
01243 }
01244 
01245 #if !HAVE_PTHREADS
01246 
01247 int ff_thread_get_buffer(AVCodecContext *avctx, AVFrame *f)
01248 {
01249     f->owner = avctx;
01250     return avctx->get_buffer(avctx, f);
01251 }
01252 
01253 void ff_thread_release_buffer(AVCodecContext *avctx, AVFrame *f)
01254 {
01255     f->owner->release_buffer(f->owner, f);
01256 }
01257 
01258 void ff_thread_finish_setup(AVCodecContext *avctx)
01259 {
01260 }
01261 
01262 void ff_thread_report_progress(AVFrame *f, int progress, int field)
01263 {
01264 }
01265 
01266 void ff_thread_await_progress(AVFrame *f, int progress, int field)
01267 {
01268 }
01269 
01270 #endif
01271 
01272 #if FF_API_THREAD_INIT
01273 int avcodec_thread_init(AVCodecContext *s, int thread_count)
01274 {
01275     s->thread_count = thread_count;
01276     return ff_thread_init(s);
01277 }
01278 #endif