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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 FFmpeg.
00007  *
00008  * FFmpeg 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  * FFmpeg 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 FFmpeg; if not, write to the Free Software
00020  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00021  */
00022 
00028 /* needed for mkstemp() */
00029 #define _XOPEN_SOURCE 600
00030 
00031 #include "libavutil/avstring.h"
00032 #include "libavutil/integer.h"
00033 #include "libavutil/crc.h"
00034 #include "libavutil/pixdesc.h"
00035 #include "avcodec.h"
00036 #include "dsputil.h"
00037 #include "opt.h"
00038 #include "imgconvert.h"
00039 #include "audioconvert.h"
00040 #include "libxvid_internal.h"
00041 #include "internal.h"
00042 #include <stdlib.h>
00043 #include <stdarg.h>
00044 #include <limits.h>
00045 #include <float.h>
00046 #if !HAVE_MKSTEMP
00047 #include <fcntl.h>
00048 #endif
00049 
00050 static int volatile entangled_thread_counter=0;
00051 int (*ff_lockmgr_cb)(void **mutex, enum AVLockOp op);
00052 static void *codec_mutex;
00053 
00054 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size)
00055 {
00056     if(min_size < *size)
00057         return ptr;
00058 
00059     *size= FFMAX(17*min_size/16 + 32, min_size);
00060 
00061     ptr= av_realloc(ptr, *size);
00062     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
00063         *size= 0;
00064 
00065     return ptr;
00066 }
00067 
00068 void av_fast_malloc(void *ptr, unsigned int *size, unsigned int min_size)
00069 {
00070     void **p = ptr;
00071     if (min_size < *size)
00072         return;
00073     *size= FFMAX(17*min_size/16 + 32, min_size);
00074     av_free(*p);
00075     *p = av_malloc(*size);
00076     if (!*p) *size = 0;
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 #if LIBAVCODEC_VERSION_MAJOR < 53
00098 void register_avcodec(AVCodec *codec)
00099 {
00100     avcodec_register(codec);
00101 }
00102 #endif
00103 
00104 unsigned avcodec_get_edge_width(void)
00105 {
00106     return EDGE_WIDTH;
00107 }
00108 
00109 void avcodec_set_dimensions(AVCodecContext *s, int width, int height){
00110     s->coded_width = width;
00111     s->coded_height= height;
00112     s->width = -((-width )>>s->lowres);
00113     s->height= -((-height)>>s->lowres);
00114 }
00115 
00116 typedef struct InternalBuffer{
00117     int last_pic_num;
00118     uint8_t *base[4];
00119     uint8_t *data[4];
00120     int linesize[4];
00121     int width, height;
00122     enum PixelFormat pix_fmt;
00123 }InternalBuffer;
00124 
00125 #define INTERNAL_BUFFER_SIZE 32
00126 
00127 void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height, int linesize_align[4]){
00128     int w_align= 1;
00129     int h_align= 1;
00130 
00131     switch(s->pix_fmt){
00132     case PIX_FMT_YUV420P:
00133     case PIX_FMT_YUYV422:
00134     case PIX_FMT_UYVY422:
00135     case PIX_FMT_YUV422P:
00136     case PIX_FMT_YUV440P:
00137     case PIX_FMT_YUV444P:
00138     case PIX_FMT_GRAY8:
00139     case PIX_FMT_GRAY16BE:
00140     case PIX_FMT_GRAY16LE:
00141     case PIX_FMT_YUVJ420P:
00142     case PIX_FMT_YUVJ422P:
00143     case PIX_FMT_YUVJ440P:
00144     case PIX_FMT_YUVJ444P:
00145     case PIX_FMT_YUVA420P:
00146         w_align= 16; //FIXME check for non mpeg style codecs and use less alignment
00147         h_align= 16;
00148         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)
00149             h_align= 32; // interlaced is rounded up to 2 MBs
00150         break;
00151     case PIX_FMT_YUV411P:
00152     case PIX_FMT_UYYVYY411:
00153         w_align=32;
00154         h_align=8;
00155         break;
00156     case PIX_FMT_YUV410P:
00157         if(s->codec_id == CODEC_ID_SVQ1){
00158             w_align=64;
00159             h_align=64;
00160         }
00161     case PIX_FMT_RGB555:
00162         if(s->codec_id == CODEC_ID_RPZA){
00163             w_align=4;
00164             h_align=4;
00165         }
00166     case PIX_FMT_PAL8:
00167     case PIX_FMT_BGR8:
00168     case PIX_FMT_RGB8:
00169         if(s->codec_id == CODEC_ID_SMC){
00170             w_align=4;
00171             h_align=4;
00172         }
00173         break;
00174     case PIX_FMT_BGR24:
00175         if((s->codec_id == CODEC_ID_MSZH) || (s->codec_id == CODEC_ID_ZLIB)){
00176             w_align=4;
00177             h_align=4;
00178         }
00179         break;
00180     default:
00181         w_align= 1;
00182         h_align= 1;
00183         break;
00184     }
00185 
00186     *width = FFALIGN(*width , w_align);
00187     *height= FFALIGN(*height, h_align);
00188     if(s->codec_id == CODEC_ID_H264)
00189         *height+=2; // some of the optimized chroma MC reads one line too much
00190 
00191     linesize_align[0] =
00192     linesize_align[1] =
00193     linesize_align[2] =
00194     linesize_align[3] = STRIDE_ALIGN;
00195 //STRIDE_ALIGN is 8 for SSE* but this does not work for SVQ1 chroma planes
00196 //we could change STRIDE_ALIGN to 16 for x86/sse but it would increase the
00197 //picture size unneccessarily in some cases. The solution here is not
00198 //pretty and better ideas are welcome!
00199 #if HAVE_MMX
00200     if(s->codec_id == CODEC_ID_SVQ1 || s->codec_id == CODEC_ID_VP5 ||
00201        s->codec_id == CODEC_ID_VP6 || s->codec_id == CODEC_ID_VP6F ||
00202        s->codec_id == CODEC_ID_VP6A) {
00203         linesize_align[0] =
00204         linesize_align[1] =
00205         linesize_align[2] = 16;
00206     }
00207 #endif
00208 }
00209 
00210 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height){
00211     int chroma_shift = av_pix_fmt_descriptors[s->pix_fmt].log2_chroma_w;
00212     int linesize_align[4];
00213     int align;
00214     avcodec_align_dimensions2(s, width, height, linesize_align);
00215     align = FFMAX(linesize_align[0], linesize_align[3]);
00216     linesize_align[1] <<= chroma_shift;
00217     linesize_align[2] <<= chroma_shift;
00218     align = FFMAX3(align, linesize_align[1], linesize_align[2]);
00219     *width=FFALIGN(*width, align);
00220 }
00221 
00222 int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h){
00223     if((int)w>0 && (int)h>0 && (w+128)*(uint64_t)(h+128) < INT_MAX/8)
00224         return 0;
00225 
00226     av_log(av_log_ctx, AV_LOG_ERROR, "picture size invalid (%ux%u)\n", w, h);
00227     return AVERROR(EINVAL);
00228 }
00229 
00230 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic){
00231     int i;
00232     int w= s->width;
00233     int h= s->height;
00234     InternalBuffer *buf;
00235     int *picture_number;
00236 
00237     if(pic->data[0]!=NULL) {
00238         av_log(s, AV_LOG_ERROR, "pic->data[0]!=NULL in avcodec_default_get_buffer\n");
00239         return -1;
00240     }
00241     if(s->internal_buffer_count >= INTERNAL_BUFFER_SIZE) {
00242         av_log(s, AV_LOG_ERROR, "internal_buffer_count overflow (missing release_buffer?)\n");
00243         return -1;
00244     }
00245 
00246     if(avcodec_check_dimensions(s,w,h))
00247         return -1;
00248 
00249     if(s->internal_buffer==NULL){
00250         s->internal_buffer= av_mallocz((INTERNAL_BUFFER_SIZE+1)*sizeof(InternalBuffer));
00251     }
00252 #if 0
00253     s->internal_buffer= av_fast_realloc(
00254         s->internal_buffer,
00255         &s->internal_buffer_size,
00256         sizeof(InternalBuffer)*FFMAX(99,  s->internal_buffer_count+1)/*FIXME*/
00257         );
00258 #endif
00259 
00260     buf= &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
00261     picture_number= &(((InternalBuffer*)s->internal_buffer)[INTERNAL_BUFFER_SIZE]).last_pic_num; //FIXME ugly hack
00262     (*picture_number)++;
00263 
00264     if(buf->base[0] && (buf->width != w || buf->height != h || buf->pix_fmt != s->pix_fmt)){
00265         for(i=0; i<4; i++){
00266             av_freep(&buf->base[i]);
00267             buf->data[i]= NULL;
00268         }
00269     }
00270 
00271     if(buf->base[0]){
00272         pic->age= *picture_number - buf->last_pic_num;
00273         buf->last_pic_num= *picture_number;
00274     }else{
00275         int h_chroma_shift, v_chroma_shift;
00276         int size[4] = {0};
00277         int tmpsize;
00278         int unaligned;
00279         AVPicture picture;
00280         int stride_align[4];
00281 
00282         avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
00283 
00284         avcodec_align_dimensions2(s, &w, &h, stride_align);
00285 
00286         if(!(s->flags&CODEC_FLAG_EMU_EDGE)){
00287             w+= EDGE_WIDTH*2;
00288             h+= EDGE_WIDTH*2;
00289         }
00290 
00291         do {
00292             // NOTE: do not align linesizes individually, this breaks e.g. assumptions
00293             // that linesize[0] == 2*linesize[1] in the MPEG-encoder for 4:2:2
00294             ff_fill_linesize(&picture, s->pix_fmt, w);
00295             // increase alignment of w for next try (rhs gives the lowest bit set in w)
00296             w += w & ~(w-1);
00297 
00298             unaligned = 0;
00299             for (i=0; i<4; i++){
00300                 unaligned |= picture.linesize[i] % stride_align[i];
00301             }
00302         } while (unaligned);
00303 
00304         tmpsize = ff_fill_pointer(&picture, NULL, s->pix_fmt, h);
00305         if (tmpsize < 0)
00306             return -1;
00307 
00308         for (i=0; i<3 && picture.data[i+1]; i++)
00309             size[i] = picture.data[i+1] - picture.data[i];
00310         size[i] = tmpsize - (picture.data[i] - picture.data[0]);
00311 
00312         buf->last_pic_num= -256*256*256*64;
00313         memset(buf->base, 0, sizeof(buf->base));
00314         memset(buf->data, 0, sizeof(buf->data));
00315 
00316         for(i=0; i<4 && size[i]; i++){
00317             const int h_shift= i==0 ? 0 : h_chroma_shift;
00318             const int v_shift= i==0 ? 0 : v_chroma_shift;
00319 
00320             buf->linesize[i]= picture.linesize[i];
00321 
00322             buf->base[i]= av_malloc(size[i]+16); //FIXME 16
00323             if(buf->base[i]==NULL) return -1;
00324             memset(buf->base[i], 128, size[i]);
00325 
00326             // no edge if EDEG EMU or not planar YUV
00327             if((s->flags&CODEC_FLAG_EMU_EDGE) || !size[2])
00328                 buf->data[i] = buf->base[i];
00329             else
00330                 buf->data[i] = buf->base[i] + FFALIGN((buf->linesize[i]*EDGE_WIDTH>>v_shift) + (EDGE_WIDTH>>h_shift), stride_align[i]);
00331         }
00332         if(size[1] && !size[2])
00333             ff_set_systematic_pal((uint32_t*)buf->data[1], s->pix_fmt);
00334         buf->width  = s->width;
00335         buf->height = s->height;
00336         buf->pix_fmt= s->pix_fmt;
00337         pic->age= 256*256*256*64;
00338     }
00339     pic->type= FF_BUFFER_TYPE_INTERNAL;
00340 
00341     for(i=0; i<4; i++){
00342         pic->base[i]= buf->base[i];
00343         pic->data[i]= buf->data[i];
00344         pic->linesize[i]= buf->linesize[i];
00345     }
00346     s->internal_buffer_count++;
00347 
00348     pic->reordered_opaque= s->reordered_opaque;
00349 
00350     if(s->debug&FF_DEBUG_BUFFERS)
00351         av_log(s, AV_LOG_DEBUG, "default_get_buffer called on pic %p, %d buffers used\n", pic, s->internal_buffer_count);
00352 
00353     return 0;
00354 }
00355 
00356 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic){
00357     int i;
00358     InternalBuffer *buf, *last;
00359 
00360     assert(pic->type==FF_BUFFER_TYPE_INTERNAL);
00361     assert(s->internal_buffer_count);
00362 
00363     buf = NULL; /* avoids warning */
00364     for(i=0; i<s->internal_buffer_count; i++){ //just 3-5 checks so is not worth to optimize
00365         buf= &((InternalBuffer*)s->internal_buffer)[i];
00366         if(buf->data[0] == pic->data[0])
00367             break;
00368     }
00369     assert(i < s->internal_buffer_count);
00370     s->internal_buffer_count--;
00371     last = &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
00372 
00373     FFSWAP(InternalBuffer, *buf, *last);
00374 
00375     for(i=0; i<4; i++){
00376         pic->data[i]=NULL;
00377 //        pic->base[i]=NULL;
00378     }
00379 //printf("R%X\n", pic->opaque);
00380 
00381     if(s->debug&FF_DEBUG_BUFFERS)
00382         av_log(s, AV_LOG_DEBUG, "default_release_buffer called on pic %p, %d buffers used\n", pic, s->internal_buffer_count);
00383 }
00384 
00385 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic){
00386     AVFrame temp_pic;
00387     int i;
00388 
00389     /* If no picture return a new buffer */
00390     if(pic->data[0] == NULL) {
00391         /* We will copy from buffer, so must be readable */
00392         pic->buffer_hints |= FF_BUFFER_HINTS_READABLE;
00393         return s->get_buffer(s, pic);
00394     }
00395 
00396     /* If internal buffer type return the same buffer */
00397     if(pic->type == FF_BUFFER_TYPE_INTERNAL) {
00398         pic->reordered_opaque= s->reordered_opaque;
00399         return 0;
00400     }
00401 
00402     /*
00403      * Not internal type and reget_buffer not overridden, emulate cr buffer
00404      */
00405     temp_pic = *pic;
00406     for(i = 0; i < 4; i++)
00407         pic->data[i] = pic->base[i] = NULL;
00408     pic->opaque = NULL;
00409     /* Allocate new frame */
00410     if (s->get_buffer(s, pic))
00411         return -1;
00412     /* Copy image data from old buffer to new buffer */
00413     av_picture_copy((AVPicture*)pic, (AVPicture*)&temp_pic, s->pix_fmt, s->width,
00414              s->height);
00415     s->release_buffer(s, &temp_pic); // Release old frame
00416     return 0;
00417 }
00418 
00419 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size){
00420     int i;
00421 
00422     for(i=0; i<count; i++){
00423         int r= func(c, (char*)arg + i*size);
00424         if(ret) ret[i]= r;
00425     }
00426     return 0;
00427 }
00428 
00429 int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int jobnr, int threadnr),void *arg, int *ret, int count){
00430     int i;
00431 
00432     for(i=0; i<count; i++){
00433         int r= func(c, arg, i, 0);
00434         if(ret) ret[i]= r;
00435     }
00436     return 0;
00437 }
00438 
00439 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat *fmt){
00440     while (*fmt != PIX_FMT_NONE && ff_is_hwaccel_pix_fmt(*fmt))
00441         ++fmt;
00442     return fmt[0];
00443 }
00444 
00445 void avcodec_get_frame_defaults(AVFrame *pic){
00446     memset(pic, 0, sizeof(AVFrame));
00447 
00448     pic->pts= AV_NOPTS_VALUE;
00449     pic->key_frame= 1;
00450 }
00451 
00452 AVFrame *avcodec_alloc_frame(void){
00453     AVFrame *pic= av_malloc(sizeof(AVFrame));
00454 
00455     if(pic==NULL) return NULL;
00456 
00457     avcodec_get_frame_defaults(pic);
00458 
00459     return pic;
00460 }
00461 
00462 int attribute_align_arg avcodec_open(AVCodecContext *avctx, AVCodec *codec)
00463 {
00464     int ret= -1;
00465 
00466     /* If there is a user-supplied mutex locking routine, call it. */
00467     if (ff_lockmgr_cb) {
00468         if ((*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
00469             return -1;
00470     }
00471 
00472     entangled_thread_counter++;
00473     if(entangled_thread_counter != 1){
00474         av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
00475         goto end;
00476     }
00477 
00478     if(avctx->codec || !codec)
00479         goto end;
00480 
00481     if (codec->priv_data_size > 0) {
00482         avctx->priv_data = av_mallocz(codec->priv_data_size);
00483         if (!avctx->priv_data) {
00484             ret = AVERROR(ENOMEM);
00485             goto end;
00486         }
00487     } else {
00488         avctx->priv_data = NULL;
00489     }
00490 
00491     if(avctx->coded_width && avctx->coded_height)
00492         avcodec_set_dimensions(avctx, avctx->coded_width, avctx->coded_height);
00493     else if(avctx->width && avctx->height)
00494         avcodec_set_dimensions(avctx, avctx->width, avctx->height);
00495 
00496 #define SANE_NB_CHANNELS 128U
00497     if (((avctx->coded_width || avctx->coded_height)
00498         && avcodec_check_dimensions(avctx, avctx->coded_width, avctx->coded_height))
00499         || avctx->channels > SANE_NB_CHANNELS) {
00500         ret = AVERROR(EINVAL);
00501         goto free_and_end;
00502     }
00503 
00504     avctx->codec = codec;
00505     if ((avctx->codec_type == AVMEDIA_TYPE_UNKNOWN || avctx->codec_type == codec->type) &&
00506         avctx->codec_id == CODEC_ID_NONE) {
00507         avctx->codec_type = codec->type;
00508         avctx->codec_id   = codec->id;
00509     }
00510     if(avctx->codec_id != codec->id || avctx->codec_type != codec->type){
00511         av_log(avctx, AV_LOG_ERROR, "codec type or id mismatches\n");
00512         goto free_and_end;
00513     }
00514     avctx->frame_number = 0;
00515     if(avctx->codec->init){
00516         ret = avctx->codec->init(avctx);
00517         if (ret < 0) {
00518             goto free_and_end;
00519         }
00520     }
00521     ret=0;
00522 end:
00523     entangled_thread_counter--;
00524 
00525     /* Release any user-supplied mutex. */
00526     if (ff_lockmgr_cb) {
00527         (*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
00528     }
00529     return ret;
00530 free_and_end:
00531     av_freep(&avctx->priv_data);
00532     avctx->codec= NULL;
00533     goto end;
00534 }
00535 
00536 int attribute_align_arg avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
00537                          const short *samples)
00538 {
00539     if(buf_size < FF_MIN_BUFFER_SIZE && 0){
00540         av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
00541         return -1;
00542     }
00543     if((avctx->codec->capabilities & CODEC_CAP_DELAY) || samples){
00544         int ret = avctx->codec->encode(avctx, buf, buf_size, samples);
00545         avctx->frame_number++;
00546         return ret;
00547     }else
00548         return 0;
00549 }
00550 
00551 int attribute_align_arg avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
00552                          const AVFrame *pict)
00553 {
00554     if(buf_size < FF_MIN_BUFFER_SIZE){
00555         av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
00556         return -1;
00557     }
00558     if(avcodec_check_dimensions(avctx,avctx->width,avctx->height))
00559         return -1;
00560     if((avctx->codec->capabilities & CODEC_CAP_DELAY) || pict){
00561         int ret = avctx->codec->encode(avctx, buf, buf_size, pict);
00562         avctx->frame_number++;
00563         emms_c(); //needed to avoid an emms_c() call before every return;
00564 
00565         return ret;
00566     }else
00567         return 0;
00568 }
00569 
00570 int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
00571                             const AVSubtitle *sub)
00572 {
00573     int ret;
00574     if(sub->start_display_time) {
00575         av_log(avctx, AV_LOG_ERROR, "start_display_time must be 0.\n");
00576         return -1;
00577     }
00578     if(sub->num_rects == 0 || !sub->rects)
00579         return -1;
00580     ret = avctx->codec->encode(avctx, buf, buf_size, sub);
00581     avctx->frame_number++;
00582     return ret;
00583 }
00584 
00585 #if LIBAVCODEC_VERSION_MAJOR < 53
00586 int attribute_align_arg avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
00587                          int *got_picture_ptr,
00588                          const uint8_t *buf, int buf_size)
00589 {
00590     AVPacket avpkt;
00591     av_init_packet(&avpkt);
00592     avpkt.data = buf;
00593     avpkt.size = buf_size;
00594     // HACK for CorePNG to decode as normal PNG by default
00595     avpkt.flags = AV_PKT_FLAG_KEY;
00596 
00597     return avcodec_decode_video2(avctx, picture, got_picture_ptr, &avpkt);
00598 }
00599 #endif
00600 
00601 int attribute_align_arg avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
00602                          int *got_picture_ptr,
00603                          AVPacket *avpkt)
00604 {
00605     int ret;
00606 
00607     *got_picture_ptr= 0;
00608     if((avctx->coded_width||avctx->coded_height) && avcodec_check_dimensions(avctx,avctx->coded_width,avctx->coded_height))
00609         return -1;
00610     if((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size){
00611         ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
00612                                 avpkt);
00613 
00614         emms_c(); //needed to avoid an emms_c() call before every return;
00615 
00616         if (*got_picture_ptr)
00617             avctx->frame_number++;
00618     }else
00619         ret= 0;
00620 
00621     return ret;
00622 }
00623 
00624 #if LIBAVCODEC_VERSION_MAJOR < 53
00625 int attribute_align_arg avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
00626                          int *frame_size_ptr,
00627                          const uint8_t *buf, int buf_size)
00628 {
00629     AVPacket avpkt;
00630     av_init_packet(&avpkt);
00631     avpkt.data = buf;
00632     avpkt.size = buf_size;
00633 
00634     return avcodec_decode_audio3(avctx, samples, frame_size_ptr, &avpkt);
00635 }
00636 #endif
00637 
00638 int attribute_align_arg avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples,
00639                          int *frame_size_ptr,
00640                          AVPacket *avpkt)
00641 {
00642     int ret;
00643 
00644     if((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size){
00645         //FIXME remove the check below _after_ ensuring that all audio check that the available space is enough
00646         if(*frame_size_ptr < AVCODEC_MAX_AUDIO_FRAME_SIZE){
00647             av_log(avctx, AV_LOG_ERROR, "buffer smaller than AVCODEC_MAX_AUDIO_FRAME_SIZE\n");
00648             return -1;
00649         }
00650         if(*frame_size_ptr < FF_MIN_BUFFER_SIZE ||
00651         *frame_size_ptr < avctx->channels * avctx->frame_size * sizeof(int16_t)){
00652             av_log(avctx, AV_LOG_ERROR, "buffer %d too small\n", *frame_size_ptr);
00653             return -1;
00654         }
00655 
00656         ret = avctx->codec->decode(avctx, samples, frame_size_ptr, avpkt);
00657         avctx->frame_number++;
00658     }else{
00659         ret= 0;
00660         *frame_size_ptr=0;
00661     }
00662     return ret;
00663 }
00664 
00665 #if LIBAVCODEC_VERSION_MAJOR < 53
00666 int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
00667                             int *got_sub_ptr,
00668                             const uint8_t *buf, int buf_size)
00669 {
00670     AVPacket avpkt;
00671     av_init_packet(&avpkt);
00672     avpkt.data = buf;
00673     avpkt.size = buf_size;
00674 
00675     return avcodec_decode_subtitle2(avctx, sub, got_sub_ptr, &avpkt);
00676 }
00677 #endif
00678 
00679 int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
00680                             int *got_sub_ptr,
00681                             AVPacket *avpkt)
00682 {
00683     int ret;
00684 
00685     *got_sub_ptr = 0;
00686     ret = avctx->codec->decode(avctx, sub, got_sub_ptr, avpkt);
00687     if (*got_sub_ptr)
00688         avctx->frame_number++;
00689     return ret;
00690 }
00691 
00692 av_cold int avcodec_close(AVCodecContext *avctx)
00693 {
00694     /* If there is a user-supplied mutex locking routine, call it. */
00695     if (ff_lockmgr_cb) {
00696         if ((*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
00697             return -1;
00698     }
00699 
00700     entangled_thread_counter++;
00701     if(entangled_thread_counter != 1){
00702         av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
00703         entangled_thread_counter--;
00704         return -1;
00705     }
00706 
00707     if (HAVE_THREADS && avctx->thread_opaque)
00708         avcodec_thread_free(avctx);
00709     if (avctx->codec && avctx->codec->close)
00710         avctx->codec->close(avctx);
00711     avcodec_default_free_buffers(avctx);
00712     av_freep(&avctx->priv_data);
00713     if(avctx->codec && avctx->codec->encode)
00714         av_freep(&avctx->extradata);
00715     avctx->codec = NULL;
00716     entangled_thread_counter--;
00717 
00718     /* Release any user-supplied mutex. */
00719     if (ff_lockmgr_cb) {
00720         (*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
00721     }
00722     return 0;
00723 }
00724 
00725 AVCodec *avcodec_find_encoder(enum CodecID id)
00726 {
00727     AVCodec *p, *experimental=NULL;
00728     p = first_avcodec;
00729     while (p) {
00730         if (p->encode != NULL && p->id == id) {
00731             if (p->capabilities & CODEC_CAP_EXPERIMENTAL && !experimental) {
00732                 experimental = p;
00733             } else
00734                 return p;
00735         }
00736         p = p->next;
00737     }
00738     return experimental;
00739 }
00740 
00741 AVCodec *avcodec_find_encoder_by_name(const char *name)
00742 {
00743     AVCodec *p;
00744     if (!name)
00745         return NULL;
00746     p = first_avcodec;
00747     while (p) {
00748         if (p->encode != NULL && strcmp(name,p->name) == 0)
00749             return p;
00750         p = p->next;
00751     }
00752     return NULL;
00753 }
00754 
00755 AVCodec *avcodec_find_decoder(enum CodecID id)
00756 {
00757     AVCodec *p;
00758     p = first_avcodec;
00759     while (p) {
00760         if (p->decode != NULL && p->id == id)
00761             return p;
00762         p = p->next;
00763     }
00764     return NULL;
00765 }
00766 
00767 AVCodec *avcodec_find_decoder_by_name(const char *name)
00768 {
00769     AVCodec *p;
00770     if (!name)
00771         return NULL;
00772     p = first_avcodec;
00773     while (p) {
00774         if (p->decode != NULL && strcmp(name,p->name) == 0)
00775             return p;
00776         p = p->next;
00777     }
00778     return NULL;
00779 }
00780 
00781 static int get_bit_rate(AVCodecContext *ctx)
00782 {
00783     int bit_rate;
00784     int bits_per_sample;
00785 
00786     switch(ctx->codec_type) {
00787     case AVMEDIA_TYPE_VIDEO:
00788     case AVMEDIA_TYPE_DATA:
00789     case AVMEDIA_TYPE_SUBTITLE:
00790     case AVMEDIA_TYPE_ATTACHMENT:
00791         bit_rate = ctx->bit_rate;
00792         break;
00793     case AVMEDIA_TYPE_AUDIO:
00794         bits_per_sample = av_get_bits_per_sample(ctx->codec_id);
00795         bit_rate = bits_per_sample ? ctx->sample_rate * ctx->channels * bits_per_sample : ctx->bit_rate;
00796         break;
00797     default:
00798         bit_rate = 0;
00799         break;
00800     }
00801     return bit_rate;
00802 }
00803 
00804 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
00805 {
00806     const char *codec_name;
00807     AVCodec *p;
00808     char buf1[32];
00809     int bitrate;
00810     AVRational display_aspect_ratio;
00811 
00812     if (encode)
00813         p = avcodec_find_encoder(enc->codec_id);
00814     else
00815         p = avcodec_find_decoder(enc->codec_id);
00816 
00817     if (p) {
00818         codec_name = p->name;
00819     } else if (enc->codec_id == CODEC_ID_MPEG2TS) {
00820         /* fake mpeg2 transport stream codec (currently not
00821            registered) */
00822         codec_name = "mpeg2ts";
00823     } else if (enc->codec_name[0] != '\0') {
00824         codec_name = enc->codec_name;
00825     } else {
00826         /* output avi tags */
00827         if(   isprint(enc->codec_tag&0xFF) && isprint((enc->codec_tag>>8)&0xFF)
00828            && isprint((enc->codec_tag>>16)&0xFF) && isprint((enc->codec_tag>>24)&0xFF)){
00829             snprintf(buf1, sizeof(buf1), "%c%c%c%c / 0x%04X",
00830                      enc->codec_tag & 0xff,
00831                      (enc->codec_tag >> 8) & 0xff,
00832                      (enc->codec_tag >> 16) & 0xff,
00833                      (enc->codec_tag >> 24) & 0xff,
00834                       enc->codec_tag);
00835         } else {
00836             snprintf(buf1, sizeof(buf1), "0x%04x", enc->codec_tag);
00837         }
00838         codec_name = buf1;
00839     }
00840 
00841     switch(enc->codec_type) {
00842     case AVMEDIA_TYPE_VIDEO:
00843         snprintf(buf, buf_size,
00844                  "Video: %s%s",
00845                  codec_name, enc->mb_decision ? " (hq)" : "");
00846         if (enc->pix_fmt != PIX_FMT_NONE) {
00847             snprintf(buf + strlen(buf), buf_size - strlen(buf),
00848                      ", %s",
00849                      avcodec_get_pix_fmt_name(enc->pix_fmt));
00850         }
00851         if (enc->width) {
00852             snprintf(buf + strlen(buf), buf_size - strlen(buf),
00853                      ", %dx%d",
00854                      enc->width, enc->height);
00855             if (enc->sample_aspect_ratio.num) {
00856                 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
00857                           enc->width*enc->sample_aspect_ratio.num,
00858                           enc->height*enc->sample_aspect_ratio.den,
00859                           1024*1024);
00860                 snprintf(buf + strlen(buf), buf_size - strlen(buf),
00861                          " [PAR %d:%d DAR %d:%d]",
00862                          enc->sample_aspect_ratio.num, enc->sample_aspect_ratio.den,
00863                          display_aspect_ratio.num, display_aspect_ratio.den);
00864             }
00865             if(av_log_get_level() >= AV_LOG_DEBUG){
00866                 int g= av_gcd(enc->time_base.num, enc->time_base.den);
00867                 snprintf(buf + strlen(buf), buf_size - strlen(buf),
00868                      ", %d/%d",
00869                      enc->time_base.num/g, enc->time_base.den/g);
00870             }
00871         }
00872         if (encode) {
00873             snprintf(buf + strlen(buf), buf_size - strlen(buf),
00874                      ", q=%d-%d", enc->qmin, enc->qmax);
00875         }
00876         break;
00877     case AVMEDIA_TYPE_AUDIO:
00878         snprintf(buf, buf_size,
00879                  "Audio: %s",
00880                  codec_name);
00881         if (enc->sample_rate) {
00882             snprintf(buf + strlen(buf), buf_size - strlen(buf),
00883                      ", %d Hz", enc->sample_rate);
00884         }
00885         av_strlcat(buf, ", ", buf_size);
00886         avcodec_get_channel_layout_string(buf + strlen(buf), buf_size - strlen(buf), enc->channels, enc->channel_layout);
00887         if (enc->sample_fmt != SAMPLE_FMT_NONE) {
00888             snprintf(buf + strlen(buf), buf_size - strlen(buf),
00889                      ", %s", avcodec_get_sample_fmt_name(enc->sample_fmt));
00890         }
00891         break;
00892     case AVMEDIA_TYPE_DATA:
00893         snprintf(buf, buf_size, "Data: %s", codec_name);
00894         break;
00895     case AVMEDIA_TYPE_SUBTITLE:
00896         snprintf(buf, buf_size, "Subtitle: %s", codec_name);
00897         break;
00898     case AVMEDIA_TYPE_ATTACHMENT:
00899         snprintf(buf, buf_size, "Attachment: %s", codec_name);
00900         break;
00901     default:
00902         snprintf(buf, buf_size, "Invalid Codec type %d", enc->codec_type);
00903         return;
00904     }
00905     if (encode) {
00906         if (enc->flags & CODEC_FLAG_PASS1)
00907             snprintf(buf + strlen(buf), buf_size - strlen(buf),
00908                      ", pass 1");
00909         if (enc->flags & CODEC_FLAG_PASS2)
00910             snprintf(buf + strlen(buf), buf_size - strlen(buf),
00911                      ", pass 2");
00912     }
00913     bitrate = get_bit_rate(enc);
00914     if (bitrate != 0) {
00915         snprintf(buf + strlen(buf), buf_size - strlen(buf),
00916                  ", %d kb/s", bitrate / 1000);
00917     }
00918 }
00919 
00920 unsigned avcodec_version( void )
00921 {
00922   return LIBAVCODEC_VERSION_INT;
00923 }
00924 
00925 const char *avcodec_configuration(void)
00926 {
00927     return FFMPEG_CONFIGURATION;
00928 }
00929 
00930 const char *avcodec_license(void)
00931 {
00932 #define LICENSE_PREFIX "libavcodec license: "
00933     return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
00934 }
00935 
00936 void avcodec_init(void)
00937 {
00938     static int initialized = 0;
00939 
00940     if (initialized != 0)
00941         return;
00942     initialized = 1;
00943 
00944     dsputil_static_init();
00945 }
00946 
00947 void avcodec_flush_buffers(AVCodecContext *avctx)
00948 {
00949     if(avctx->codec->flush)
00950         avctx->codec->flush(avctx);
00951 }
00952 
00953 void avcodec_default_free_buffers(AVCodecContext *s){
00954     int i, j;
00955 
00956     if(s->internal_buffer==NULL) return;
00957 
00958     if (s->internal_buffer_count)
00959         av_log(s, AV_LOG_WARNING, "Found %i unreleased buffers!\n", s->internal_buffer_count);
00960     for(i=0; i<INTERNAL_BUFFER_SIZE; i++){
00961         InternalBuffer *buf= &((InternalBuffer*)s->internal_buffer)[i];
00962         for(j=0; j<4; j++){
00963             av_freep(&buf->base[j]);
00964             buf->data[j]= NULL;
00965         }
00966     }
00967     av_freep(&s->internal_buffer);
00968 
00969     s->internal_buffer_count=0;
00970 }
00971 
00972 char av_get_pict_type_char(int pict_type){
00973     switch(pict_type){
00974     case FF_I_TYPE: return 'I';
00975     case FF_P_TYPE: return 'P';
00976     case FF_B_TYPE: return 'B';
00977     case FF_S_TYPE: return 'S';
00978     case FF_SI_TYPE:return 'i';
00979     case FF_SP_TYPE:return 'p';
00980     case FF_BI_TYPE:return 'b';
00981     default:        return '?';
00982     }
00983 }
00984 
00985 int av_get_bits_per_sample(enum CodecID codec_id){
00986     switch(codec_id){
00987     case CODEC_ID_ADPCM_SBPRO_2:
00988         return 2;
00989     case CODEC_ID_ADPCM_SBPRO_3:
00990         return 3;
00991     case CODEC_ID_ADPCM_SBPRO_4:
00992     case CODEC_ID_ADPCM_CT:
00993     case CODEC_ID_ADPCM_IMA_WAV:
00994     case CODEC_ID_ADPCM_MS:
00995     case CODEC_ID_ADPCM_YAMAHA:
00996         return 4;
00997     case CODEC_ID_PCM_ALAW:
00998     case CODEC_ID_PCM_MULAW:
00999     case CODEC_ID_PCM_S8:
01000     case CODEC_ID_PCM_U8:
01001     case CODEC_ID_PCM_ZORK:
01002         return 8;
01003     case CODEC_ID_PCM_S16BE:
01004     case CODEC_ID_PCM_S16LE:
01005     case CODEC_ID_PCM_S16LE_PLANAR:
01006     case CODEC_ID_PCM_U16BE:
01007     case CODEC_ID_PCM_U16LE:
01008         return 16;
01009     case CODEC_ID_PCM_S24DAUD:
01010     case CODEC_ID_PCM_S24BE:
01011     case CODEC_ID_PCM_S24LE:
01012     case CODEC_ID_PCM_U24BE:
01013     case CODEC_ID_PCM_U24LE:
01014         return 24;
01015     case CODEC_ID_PCM_S32BE:
01016     case CODEC_ID_PCM_S32LE:
01017     case CODEC_ID_PCM_U32BE:
01018     case CODEC_ID_PCM_U32LE:
01019     case CODEC_ID_PCM_F32BE:
01020     case CODEC_ID_PCM_F32LE:
01021         return 32;
01022     case CODEC_ID_PCM_F64BE:
01023     case CODEC_ID_PCM_F64LE:
01024         return 64;
01025     default:
01026         return 0;
01027     }
01028 }
01029 
01030 int av_get_bits_per_sample_format(enum SampleFormat sample_fmt) {
01031     switch (sample_fmt) {
01032     case SAMPLE_FMT_U8:
01033         return 8;
01034     case SAMPLE_FMT_S16:
01035         return 16;
01036     case SAMPLE_FMT_S32:
01037     case SAMPLE_FMT_FLT:
01038         return 32;
01039     case SAMPLE_FMT_DBL:
01040         return 64;
01041     default:
01042         return 0;
01043     }
01044 }
01045 
01046 #if !HAVE_THREADS
01047 int avcodec_thread_init(AVCodecContext *s, int thread_count){
01048     s->thread_count = thread_count;
01049     return -1;
01050 }
01051 #endif
01052 
01053 unsigned int av_xiphlacing(unsigned char *s, unsigned int v)
01054 {
01055     unsigned int n = 0;
01056 
01057     while(v >= 0xff) {
01058         *s++ = 0xff;
01059         v -= 0xff;
01060         n++;
01061     }
01062     *s = v;
01063     n++;
01064     return n;
01065 }
01066 
01067 /* Wrapper to work around the lack of mkstemp() on mingw/cygin.
01068  * Also, tries to create file in /tmp first, if possible.
01069  * *prefix can be a character constant; *filename will be allocated internally.
01070  * Returns file descriptor of opened file (or -1 on error)
01071  * and opened file name in **filename. */
01072 int av_tempfile(char *prefix, char **filename) {
01073     int fd=-1;
01074 #if !HAVE_MKSTEMP
01075     *filename = tempnam(".", prefix);
01076 #else
01077     size_t len = strlen(prefix) + 12; /* room for "/tmp/" and "XXXXXX\0" */
01078     *filename = av_malloc(len);
01079 #endif
01080     /* -----common section-----*/
01081     if (*filename == NULL) {
01082         av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot allocate file name\n");
01083         return -1;
01084     }
01085 #if !HAVE_MKSTEMP
01086     fd = open(*filename, O_RDWR | O_BINARY | O_CREAT, 0444);
01087 #else
01088     snprintf(*filename, len, "/tmp/%sXXXXXX", prefix);
01089     fd = mkstemp(*filename);
01090     if (fd < 0) {
01091         snprintf(*filename, len, "./%sXXXXXX", prefix);
01092         fd = mkstemp(*filename);
01093     }
01094 #endif
01095     /* -----common section-----*/
01096     if (fd < 0) {
01097         av_log(NULL, AV_LOG_ERROR, "ff_tempfile: Cannot open temporary file %s\n", *filename);
01098         return -1;
01099     }
01100     return fd; /* success */
01101 }
01102 
01103 typedef struct {
01104     const char *abbr;
01105     int width, height;
01106 } VideoFrameSizeAbbr;
01107 
01108 typedef struct {
01109     const char *abbr;
01110     int rate_num, rate_den;
01111 } VideoFrameRateAbbr;
01112 
01113 static const VideoFrameSizeAbbr video_frame_size_abbrs[] = {
01114     { "ntsc",      720, 480 },
01115     { "pal",       720, 576 },
01116     { "qntsc",     352, 240 }, /* VCD compliant NTSC */
01117     { "qpal",      352, 288 }, /* VCD compliant PAL */
01118     { "sntsc",     640, 480 }, /* square pixel NTSC */
01119     { "spal",      768, 576 }, /* square pixel PAL */
01120     { "film",      352, 240 },
01121     { "ntsc-film", 352, 240 },
01122     { "sqcif",     128,  96 },
01123     { "qcif",      176, 144 },
01124     { "cif",       352, 288 },
01125     { "4cif",      704, 576 },
01126     { "16cif",    1408,1152 },
01127     { "qqvga",     160, 120 },
01128     { "qvga",      320, 240 },
01129     { "vga",       640, 480 },
01130     { "svga",      800, 600 },
01131     { "xga",      1024, 768 },
01132     { "uxga",     1600,1200 },
01133     { "qxga",     2048,1536 },
01134     { "sxga",     1280,1024 },
01135     { "qsxga",    2560,2048 },
01136     { "hsxga",    5120,4096 },
01137     { "wvga",      852, 480 },
01138     { "wxga",     1366, 768 },
01139     { "wsxga",    1600,1024 },
01140     { "wuxga",    1920,1200 },
01141     { "woxga",    2560,1600 },
01142     { "wqsxga",   3200,2048 },
01143     { "wquxga",   3840,2400 },
01144     { "whsxga",   6400,4096 },
01145     { "whuxga",   7680,4800 },
01146     { "cga",       320, 200 },
01147     { "ega",       640, 350 },
01148     { "hd480",     852, 480 },
01149     { "hd720",    1280, 720 },
01150     { "hd1080",   1920,1080 },
01151 };
01152 
01153 static const VideoFrameRateAbbr video_frame_rate_abbrs[]= {
01154     { "ntsc",      30000, 1001 },
01155     { "pal",          25,    1 },
01156     { "qntsc",     30000, 1001 }, /* VCD compliant NTSC */
01157     { "qpal",         25,    1 }, /* VCD compliant PAL */
01158     { "sntsc",     30000, 1001 }, /* square pixel NTSC */
01159     { "spal",         25,    1 }, /* square pixel PAL */
01160     { "film",         24,    1 },
01161     { "ntsc-film", 24000, 1001 },
01162 };
01163 
01164 int av_parse_video_frame_size(int *width_ptr, int *height_ptr, const char *str)
01165 {
01166     int i;
01167     int n = FF_ARRAY_ELEMS(video_frame_size_abbrs);
01168     char *p;
01169     int frame_width = 0, frame_height = 0;
01170 
01171     for(i=0;i<n;i++) {
01172         if (!strcmp(video_frame_size_abbrs[i].abbr, str)) {
01173             frame_width = video_frame_size_abbrs[i].width;
01174             frame_height = video_frame_size_abbrs[i].height;
01175             break;
01176         }
01177     }
01178     if (i == n) {
01179         p = str;
01180         frame_width = strtol(p, &p, 10);
01181         if (*p)
01182             p++;
01183         frame_height = strtol(p, &p, 10);
01184     }
01185     if (frame_width <= 0 || frame_height <= 0)
01186         return -1;
01187     *width_ptr = frame_width;
01188     *height_ptr = frame_height;
01189     return 0;
01190 }
01191 
01192 int av_parse_video_frame_rate(AVRational *frame_rate, const char *arg)
01193 {
01194     int i;
01195     int n = FF_ARRAY_ELEMS(video_frame_rate_abbrs);
01196     char* cp;
01197 
01198     /* First, we check our abbreviation table */
01199     for (i = 0; i < n; ++i)
01200          if (!strcmp(video_frame_rate_abbrs[i].abbr, arg)) {
01201              frame_rate->num = video_frame_rate_abbrs[i].rate_num;
01202              frame_rate->den = video_frame_rate_abbrs[i].rate_den;
01203              return 0;
01204          }
01205 
01206     /* Then, we try to parse it as fraction */
01207     cp = strchr(arg, '/');
01208     if (!cp)
01209         cp = strchr(arg, ':');
01210     if (cp) {
01211         char* cpp;
01212         frame_rate->num = strtol(arg, &cpp, 10);
01213         if (cpp != arg || cpp == cp)
01214             frame_rate->den = strtol(cp+1, &cpp, 10);
01215         else
01216            frame_rate->num = 0;
01217     }
01218     else {
01219         /* Finally we give up and parse it as double */
01220         AVRational time_base = av_d2q(strtod(arg, 0), 1001000);
01221         frame_rate->den = time_base.den;
01222         frame_rate->num = time_base.num;
01223     }
01224     if (!frame_rate->num || !frame_rate->den)
01225         return -1;
01226     else
01227         return 0;
01228 }
01229 
01230 int ff_match_2uint16(const uint16_t (*tab)[2], int size, int a, int b){
01231     int i;
01232     for(i=0; i<size && !(tab[i][0]==a && tab[i][1]==b); i++);
01233     return i;
01234 }
01235 
01236 void av_log_missing_feature(void *avc, const char *feature, int want_sample)
01237 {
01238     av_log(avc, AV_LOG_WARNING, "%s not implemented. Update your FFmpeg "
01239             "version to the newest one from SVN. If the problem still "
01240             "occurs, it means that your file has a feature which has not "
01241             "been implemented.", feature);
01242     if(want_sample)
01243         av_log_ask_for_sample(avc, NULL);
01244     else
01245         av_log(avc, AV_LOG_WARNING, "\n");
01246 }
01247 
01248 void av_log_ask_for_sample(void *avc, const char *msg)
01249 {
01250     if (msg)
01251         av_log(avc, AV_LOG_WARNING, "%s ", msg);
01252     av_log(avc, AV_LOG_WARNING, "If you want to help, upload a sample "
01253             "of this file to ftp://upload.ffmpeg.org/MPlayer/incoming/ "
01254             "and contact the ffmpeg-devel mailing list.\n");
01255 }
01256 
01257 static AVHWAccel *first_hwaccel = NULL;
01258 
01259 void av_register_hwaccel(AVHWAccel *hwaccel)
01260 {
01261     AVHWAccel **p = &first_hwaccel;
01262     while (*p)
01263         p = &(*p)->next;
01264     *p = hwaccel;
01265     hwaccel->next = NULL;
01266 }
01267 
01268 AVHWAccel *av_hwaccel_next(AVHWAccel *hwaccel)
01269 {
01270     return hwaccel ? hwaccel->next : first_hwaccel;
01271 }
01272 
01273 AVHWAccel *ff_find_hwaccel(enum CodecID codec_id, enum PixelFormat pix_fmt)
01274 {
01275     AVHWAccel *hwaccel=NULL;
01276 
01277     while((hwaccel= av_hwaccel_next(hwaccel))){
01278         if (   hwaccel->id      == codec_id
01279             && hwaccel->pix_fmt == pix_fmt)
01280             return hwaccel;
01281     }
01282     return NULL;
01283 }
01284 
01285 int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op))
01286 {
01287     if (ff_lockmgr_cb) {
01288         if (ff_lockmgr_cb(&codec_mutex, AV_LOCK_DESTROY))
01289             return -1;
01290     }
01291 
01292     ff_lockmgr_cb = cb;
01293 
01294     if (ff_lockmgr_cb) {
01295         if (ff_lockmgr_cb(&codec_mutex, AV_LOCK_CREATE))
01296             return -1;
01297     }
01298     return 0;
01299 }

Generated on Fri Sep 16 2011 17:17:44 for FFmpeg by  doxygen 1.7.1