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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 #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, FF_INTERNALC_MEM_TYPE 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, FF_INTERNALC_MEM_TYPE 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 #if LIBAVCODEC_VERSION_MAJOR < 53
00099 void register_avcodec(AVCodec *codec)
00100 {
00101     avcodec_register(codec);
00102 }
00103 #endif
00104 
00105 unsigned avcodec_get_edge_width(void)
00106 {
00107     return EDGE_WIDTH;
00108 }
00109 
00110 void avcodec_set_dimensions(AVCodecContext *s, int width, int height){
00111     s->coded_width = width;
00112     s->coded_height= height;
00113     s->width = -((-width )>>s->lowres);
00114     s->height= -((-height)>>s->lowres);
00115 }
00116 
00117 typedef struct InternalBuffer{
00118     int last_pic_num;
00119     uint8_t *base[4];
00120     uint8_t *data[4];
00121     int linesize[4];
00122     int width, height;
00123     enum PixelFormat pix_fmt;
00124 }InternalBuffer;
00125 
00126 #define INTERNAL_BUFFER_SIZE (32+1)
00127 
00128 void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height, int linesize_align[4]){
00129     int w_align= 1;
00130     int h_align= 1;
00131 
00132     switch(s->pix_fmt){
00133     case PIX_FMT_YUV420P:
00134     case PIX_FMT_YUYV422:
00135     case PIX_FMT_UYVY422:
00136     case PIX_FMT_YUV422P:
00137     case PIX_FMT_YUV440P:
00138     case PIX_FMT_YUV444P:
00139     case PIX_FMT_GRAY8:
00140     case PIX_FMT_GRAY16BE:
00141     case PIX_FMT_GRAY16LE:
00142     case PIX_FMT_YUVJ420P:
00143     case PIX_FMT_YUVJ422P:
00144     case PIX_FMT_YUVJ440P:
00145     case PIX_FMT_YUVJ444P:
00146     case PIX_FMT_YUVA420P:
00147     case PIX_FMT_YUV420P9LE:
00148     case PIX_FMT_YUV420P9BE:
00149     case PIX_FMT_YUV420P10LE:
00150     case PIX_FMT_YUV420P10BE:
00151     case PIX_FMT_YUV422P10LE:
00152     case PIX_FMT_YUV422P10BE:
00153     case PIX_FMT_YUV444P9LE:
00154     case PIX_FMT_YUV444P9BE:
00155     case PIX_FMT_YUV444P10LE:
00156     case PIX_FMT_YUV444P10BE:
00157         w_align= 16; //FIXME check for non mpeg style codecs and use less alignment
00158         h_align= 16;
00159         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)
00160             h_align= 32; // interlaced is rounded up to 2 MBs
00161         break;
00162     case PIX_FMT_YUV411P:
00163     case PIX_FMT_UYYVYY411:
00164         w_align=32;
00165         h_align=8;
00166         break;
00167     case PIX_FMT_YUV410P:
00168         if(s->codec_id == CODEC_ID_SVQ1){
00169             w_align=64;
00170             h_align=64;
00171         }
00172     case PIX_FMT_RGB555:
00173         if(s->codec_id == CODEC_ID_RPZA){
00174             w_align=4;
00175             h_align=4;
00176         }
00177     case PIX_FMT_PAL8:
00178     case PIX_FMT_BGR8:
00179     case PIX_FMT_RGB8:
00180         if(s->codec_id == CODEC_ID_SMC){
00181             w_align=4;
00182             h_align=4;
00183         }
00184         break;
00185     case PIX_FMT_BGR24:
00186         if((s->codec_id == CODEC_ID_MSZH) || (s->codec_id == CODEC_ID_ZLIB)){
00187             w_align=4;
00188             h_align=4;
00189         }
00190         break;
00191     default:
00192         w_align= 1;
00193         h_align= 1;
00194         break;
00195     }
00196 
00197     *width = FFALIGN(*width , w_align);
00198     *height= FFALIGN(*height, h_align);
00199     if(s->codec_id == CODEC_ID_H264 || s->lowres)
00200         *height+=2; // some of the optimized chroma MC reads one line too much
00201                     // which is also done in mpeg decoders with lowres > 0
00202 
00203     linesize_align[0] =
00204     linesize_align[1] =
00205     linesize_align[2] =
00206     linesize_align[3] = STRIDE_ALIGN;
00207 //STRIDE_ALIGN is 8 for SSE* but this does not work for SVQ1 chroma planes
00208 //we could change STRIDE_ALIGN to 16 for x86/sse but it would increase the
00209 //picture size unneccessarily in some cases. The solution here is not
00210 //pretty and better ideas are welcome!
00211 #if HAVE_MMX
00212     if(s->codec_id == CODEC_ID_SVQ1 || s->codec_id == CODEC_ID_VP5 ||
00213        s->codec_id == CODEC_ID_VP6 || s->codec_id == CODEC_ID_VP6F ||
00214        s->codec_id == CODEC_ID_VP6A) {
00215         linesize_align[0] =
00216         linesize_align[1] =
00217         linesize_align[2] = 16;
00218     }
00219 #endif
00220 }
00221 
00222 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height){
00223     int chroma_shift = av_pix_fmt_descriptors[s->pix_fmt].log2_chroma_w;
00224     int linesize_align[4];
00225     int align;
00226     avcodec_align_dimensions2(s, width, height, linesize_align);
00227     align = FFMAX(linesize_align[0], linesize_align[3]);
00228     linesize_align[1] <<= chroma_shift;
00229     linesize_align[2] <<= chroma_shift;
00230     align = FFMAX3(align, linesize_align[1], linesize_align[2]);
00231     *width=FFALIGN(*width, align);
00232 }
00233 
00234 #if LIBAVCODEC_VERSION_MAJOR < 53
00235 int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h){
00236     return av_image_check_size(w, h, 0, av_log_ctx);
00237 }
00238 #endif
00239 
00240 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic){
00241     int i;
00242     int w= s->width;
00243     int h= s->height;
00244     InternalBuffer *buf;
00245     int *picture_number;
00246 
00247     if(pic->data[0]!=NULL) {
00248         av_log(s, AV_LOG_ERROR, "pic->data[0]!=NULL in avcodec_default_get_buffer\n");
00249         return -1;
00250     }
00251     if(s->internal_buffer_count >= INTERNAL_BUFFER_SIZE) {
00252         av_log(s, AV_LOG_ERROR, "internal_buffer_count overflow (missing release_buffer?)\n");
00253         return -1;
00254     }
00255 
00256     if(av_image_check_size(w, h, 0, s))
00257         return -1;
00258 
00259     if(s->internal_buffer==NULL){
00260         s->internal_buffer= av_mallocz((INTERNAL_BUFFER_SIZE+1)*sizeof(InternalBuffer));
00261     }
00262 #if 0
00263     s->internal_buffer= av_fast_realloc(
00264         s->internal_buffer,
00265         &s->internal_buffer_size,
00266         sizeof(InternalBuffer)*FFMAX(99,  s->internal_buffer_count+1)/*FIXME*/
00267         );
00268 #endif
00269 
00270     buf= &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
00271     picture_number= &(((InternalBuffer*)s->internal_buffer)[INTERNAL_BUFFER_SIZE]).last_pic_num; //FIXME ugly hack
00272     (*picture_number)++;
00273 
00274     if(buf->base[0] && (buf->width != w || buf->height != h || buf->pix_fmt != s->pix_fmt)){
00275         if(s->active_thread_type&FF_THREAD_FRAME) {
00276             av_log_missing_feature(s, "Width/height changing with frame threads is", 0);
00277             return -1;
00278         }
00279 
00280         for(i=0; i<4; i++){
00281             av_freep(&buf->base[i]);
00282             buf->data[i]= NULL;
00283         }
00284     }
00285 
00286     if(buf->base[0]){
00287         pic->age= *picture_number - buf->last_pic_num;
00288         buf->last_pic_num= *picture_number;
00289     }else{
00290         int h_chroma_shift, v_chroma_shift;
00291         int size[4] = {0};
00292         int tmpsize;
00293         int unaligned;
00294         AVPicture picture;
00295         int stride_align[4];
00296         const int pixel_size = av_pix_fmt_descriptors[s->pix_fmt].comp[0].step_minus1+1;
00297 
00298         avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
00299 
00300         avcodec_align_dimensions2(s, &w, &h, stride_align);
00301 
00302         if(!(s->flags&CODEC_FLAG_EMU_EDGE)){
00303             w+= EDGE_WIDTH*2;
00304             h+= EDGE_WIDTH*2;
00305         }
00306 
00307         do {
00308             // NOTE: do not align linesizes individually, this breaks e.g. assumptions
00309             // that linesize[0] == 2*linesize[1] in the MPEG-encoder for 4:2:2
00310             av_image_fill_linesizes(picture.linesize, s->pix_fmt, w);
00311             // increase alignment of w for next try (rhs gives the lowest bit set in w)
00312             w += w & ~(w-1);
00313 
00314             unaligned = 0;
00315             for (i=0; i<4; i++){
00316                 unaligned |= picture.linesize[i] % stride_align[i];
00317             }
00318         } while (unaligned);
00319 
00320         tmpsize = av_image_fill_pointers(picture.data, s->pix_fmt, h, NULL, picture.linesize);
00321         if (tmpsize < 0)
00322             return -1;
00323 
00324         for (i=0; i<3 && picture.data[i+1]; i++)
00325             size[i] = picture.data[i+1] - picture.data[i];
00326         size[i] = tmpsize - (picture.data[i] - picture.data[0]);
00327 
00328         buf->last_pic_num= -256*256*256*64;
00329         memset(buf->base, 0, sizeof(buf->base));
00330         memset(buf->data, 0, sizeof(buf->data));
00331 
00332         for(i=0; i<4 && size[i]; i++){
00333             const int h_shift= i==0 ? 0 : h_chroma_shift;
00334             const int v_shift= i==0 ? 0 : v_chroma_shift;
00335 
00336             buf->linesize[i]= picture.linesize[i];
00337 
00338             buf->base[i]= av_malloc(size[i]+16); //FIXME 16
00339             if(buf->base[i]==NULL) return -1;
00340             memset(buf->base[i], 128, size[i]);
00341 
00342             // no edge if EDGE EMU or not planar YUV
00343             if((s->flags&CODEC_FLAG_EMU_EDGE) || !size[2])
00344                 buf->data[i] = buf->base[i];
00345             else
00346                 buf->data[i] = buf->base[i] + FFALIGN((buf->linesize[i]*EDGE_WIDTH>>v_shift) + (pixel_size*EDGE_WIDTH>>h_shift), stride_align[i]);
00347         }
00348         if(size[1] && !size[2])
00349             ff_set_systematic_pal2((uint32_t*)buf->data[1], s->pix_fmt);
00350         buf->width  = s->width;
00351         buf->height = s->height;
00352         buf->pix_fmt= s->pix_fmt;
00353         pic->age= 256*256*256*64;
00354     }
00355     pic->type= FF_BUFFER_TYPE_INTERNAL;
00356 
00357     for(i=0; i<4; i++){
00358         pic->base[i]= buf->base[i];
00359         pic->data[i]= buf->data[i];
00360         pic->linesize[i]= buf->linesize[i];
00361     }
00362     s->internal_buffer_count++;
00363 
00364     if (s->pkt) {
00365         pic->pkt_pts = s->pkt->pts;
00366         pic->pkt_pos = s->pkt->pos;
00367     } else {
00368         pic->pkt_pts = AV_NOPTS_VALUE;
00369         pic->pkt_pos = -1;
00370     }
00371     pic->reordered_opaque= s->reordered_opaque;
00372     pic->sample_aspect_ratio = s->sample_aspect_ratio;
00373     pic->width               = s->width;
00374     pic->height              = s->height;
00375     pic->format              = s->pix_fmt;
00376 
00377     if(s->debug&FF_DEBUG_BUFFERS)
00378         av_log(s, AV_LOG_DEBUG, "default_get_buffer called on pic %p, %d buffers used\n", pic, s->internal_buffer_count);
00379 
00380     return 0;
00381 }
00382 
00383 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic){
00384     int i;
00385     InternalBuffer *buf, *last;
00386 
00387     assert(pic->type==FF_BUFFER_TYPE_INTERNAL);
00388     assert(s->internal_buffer_count);
00389 
00390     if(s->internal_buffer){
00391     buf = NULL; /* avoids warning */
00392     for(i=0; i<s->internal_buffer_count; i++){ //just 3-5 checks so is not worth to optimize
00393         buf= &((InternalBuffer*)s->internal_buffer)[i];
00394         if(buf->data[0] == pic->data[0])
00395             break;
00396     }
00397     assert(i < s->internal_buffer_count);
00398     s->internal_buffer_count--;
00399     last = &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
00400 
00401     FFSWAP(InternalBuffer, *buf, *last);
00402     }
00403 
00404     for(i=0; i<4; i++){
00405         pic->data[i]=NULL;
00406 //        pic->base[i]=NULL;
00407     }
00408 //printf("R%X\n", pic->opaque);
00409 
00410     if(s->debug&FF_DEBUG_BUFFERS)
00411         av_log(s, AV_LOG_DEBUG, "default_release_buffer called on pic %p, %d buffers used\n", pic, s->internal_buffer_count);
00412 }
00413 
00414 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic){
00415     AVFrame temp_pic;
00416     int i;
00417 
00418     /* If no picture return a new buffer */
00419     if(pic->data[0] == NULL) {
00420         /* We will copy from buffer, so must be readable */
00421         pic->buffer_hints |= FF_BUFFER_HINTS_READABLE;
00422         return s->get_buffer(s, pic);
00423     }
00424 
00425     /* If internal buffer type return the same buffer */
00426     if(pic->type == FF_BUFFER_TYPE_INTERNAL) {
00427         if(s->pkt) pic->pkt_pts= s->pkt->pts;
00428         else       pic->pkt_pts= AV_NOPTS_VALUE;
00429         pic->reordered_opaque= s->reordered_opaque;
00430         return 0;
00431     }
00432 
00433     /*
00434      * Not internal type and reget_buffer not overridden, emulate cr buffer
00435      */
00436     temp_pic = *pic;
00437     for(i = 0; i < 4; i++)
00438         pic->data[i] = pic->base[i] = NULL;
00439     pic->opaque = NULL;
00440     /* Allocate new frame */
00441     if (s->get_buffer(s, pic))
00442         return -1;
00443     /* Copy image data from old buffer to new buffer */
00444     av_picture_copy((AVPicture*)pic, (AVPicture*)&temp_pic, s->pix_fmt, s->width,
00445              s->height);
00446     s->release_buffer(s, &temp_pic); // Release old frame
00447     return 0;
00448 }
00449 
00450 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size){
00451     int i;
00452 
00453     for(i=0; i<count; i++){
00454         int r= func(c, (char*)arg + i*size);
00455         if(ret) ret[i]= r;
00456     }
00457     return 0;
00458 }
00459 
00460 int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int jobnr, int threadnr),void *arg, int *ret, int count){
00461     int i;
00462 
00463     for(i=0; i<count; i++){
00464         int r= func(c, arg, i, 0);
00465         if(ret) ret[i]= r;
00466     }
00467     return 0;
00468 }
00469 
00470 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat *fmt){
00471     while (*fmt != PIX_FMT_NONE && ff_is_hwaccel_pix_fmt(*fmt))
00472         ++fmt;
00473     return fmt[0];
00474 }
00475 
00476 void avcodec_get_frame_defaults(AVFrame *pic){
00477     memset(pic, 0, sizeof(AVFrame));
00478 
00479     pic->pts = pic->best_effort_timestamp = AV_NOPTS_VALUE;
00480     pic->pkt_pos = -1;
00481     pic->key_frame= 1;
00482     pic->sample_aspect_ratio = (AVRational){0, 1};
00483     pic->format = -1;           /* unknown */
00484 }
00485 
00486 AVFrame *avcodec_alloc_frame(void){
00487     AVFrame *pic= av_malloc(sizeof(AVFrame));
00488 
00489     if(pic==NULL) return NULL;
00490 
00491     avcodec_get_frame_defaults(pic);
00492 
00493     return pic;
00494 }
00495 
00496 static void avcodec_get_subtitle_defaults(AVSubtitle *sub)
00497 {
00498     memset(sub, 0, sizeof(*sub));
00499     sub->pts = AV_NOPTS_VALUE;
00500 }
00501 
00502 #if FF_API_AVCODEC_OPEN
00503 int attribute_align_arg avcodec_open(AVCodecContext *avctx, AVCodec *codec)
00504 {
00505     return avcodec_open2(avctx, codec, NULL);
00506 }
00507 #endif
00508 
00509 int attribute_align_arg avcodec_open2(AVCodecContext *avctx, AVCodec *codec, AVDictionary **options)
00510 {
00511     int ret = 0;
00512     AVDictionary *tmp = NULL;
00513 
00514     if (options)
00515         av_dict_copy(&tmp, *options, 0);
00516 
00517     /* If there is a user-supplied mutex locking routine, call it. */
00518     if (ff_lockmgr_cb) {
00519         if ((*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
00520             return -1;
00521     }
00522 
00523     entangled_thread_counter++;
00524     if(entangled_thread_counter != 1){
00525         av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
00526         ret = -1;
00527         goto end;
00528     }
00529 
00530     if(avctx->codec || !codec) {
00531         ret = AVERROR(EINVAL);
00532         goto end;
00533     }
00534 
00535     if (codec->priv_data_size > 0) {
00536       if(!avctx->priv_data){
00537         avctx->priv_data = av_mallocz(codec->priv_data_size);
00538         if (!avctx->priv_data) {
00539             ret = AVERROR(ENOMEM);
00540             goto end;
00541         }
00542         if (codec->priv_class) {
00543             *(AVClass**)avctx->priv_data= codec->priv_class;
00544             av_opt_set_defaults(avctx->priv_data);
00545         }
00546       }
00547       if (codec->priv_class && (ret = av_opt_set_dict(avctx->priv_data, &tmp)) < 0)
00548           goto free_and_end;
00549     } else {
00550         avctx->priv_data = NULL;
00551     }
00552     if ((ret = av_opt_set_dict(avctx, &tmp)) < 0)
00553         goto free_and_end;
00554 
00555     if(avctx->coded_width && avctx->coded_height)
00556         avcodec_set_dimensions(avctx, avctx->coded_width, avctx->coded_height);
00557     else if(avctx->width && avctx->height)
00558         avcodec_set_dimensions(avctx, avctx->width, avctx->height);
00559 
00560     if ((avctx->coded_width || avctx->coded_height || avctx->width || avctx->height)
00561         && (  av_image_check_size(avctx->coded_width, avctx->coded_height, 0, avctx) < 0
00562            || av_image_check_size(avctx->width,       avctx->height,       0, avctx) < 0)) {
00563         av_log(avctx, AV_LOG_WARNING, "ignoring invalid width/height values\n");
00564         avcodec_set_dimensions(avctx, 0, 0);
00565     }
00566 
00567     /* if the decoder init function was already called previously,
00568        free the already allocated subtitle_header before overwriting it */
00569     if (codec->decode)
00570         av_freep(&avctx->subtitle_header);
00571 
00572 #define SANE_NB_CHANNELS 128U
00573     if (avctx->channels > SANE_NB_CHANNELS) {
00574         ret = AVERROR(EINVAL);
00575         goto free_and_end;
00576     }
00577 
00578     avctx->codec = codec;
00579     if ((avctx->codec_type == AVMEDIA_TYPE_UNKNOWN || avctx->codec_type == codec->type) &&
00580         avctx->codec_id == CODEC_ID_NONE) {
00581         avctx->codec_type = codec->type;
00582         avctx->codec_id   = codec->id;
00583     }
00584     if (avctx->codec_id != codec->id || (avctx->codec_type != codec->type
00585                            && avctx->codec_type != AVMEDIA_TYPE_ATTACHMENT)) {
00586         av_log(avctx, AV_LOG_ERROR, "codec type or id mismatches\n");
00587         ret = AVERROR(EINVAL);
00588         goto free_and_end;
00589     }
00590     avctx->frame_number = 0;
00591 
00592     if (HAVE_THREADS && !avctx->thread_opaque) {
00593         ret = ff_thread_init(avctx);
00594         if (ret < 0) {
00595             goto free_and_end;
00596         }
00597     }
00598 
00599     if (avctx->codec->max_lowres < avctx->lowres || avctx->lowres < 0) {
00600         av_log(avctx, AV_LOG_ERROR, "The maximum value for lowres supported by the decoder is %d\n",
00601                avctx->codec->max_lowres);
00602         ret = AVERROR(EINVAL);
00603         goto free_and_end;
00604     }
00605     if (avctx->codec->encode) {
00606         int i;
00607         if (avctx->codec->sample_fmts) {
00608             if (avctx->sample_fmt == AV_SAMPLE_FMT_NONE)
00609                 avctx->sample_fmt = AV_SAMPLE_FMT_S16;
00610             for (i = 0; avctx->codec->sample_fmts[i] != AV_SAMPLE_FMT_NONE; i++)
00611                 if (avctx->sample_fmt == avctx->codec->sample_fmts[i])
00612                     break;
00613             if (avctx->codec->sample_fmts[i] == AV_SAMPLE_FMT_NONE) {
00614                 av_log(avctx, AV_LOG_ERROR, "Specified sample_fmt is not supported.\n");
00615                 ret = AVERROR(EINVAL);
00616                 goto free_and_end;
00617             }
00618         }
00619         if (avctx->codec->supported_samplerates) {
00620             for (i = 0; avctx->codec->supported_samplerates[i] != 0; i++)
00621                 if (avctx->sample_rate == avctx->codec->supported_samplerates[i])
00622                     break;
00623             if (avctx->codec->supported_samplerates[i] == 0) {
00624                 av_log(avctx, AV_LOG_ERROR, "Specified sample_rate is not supported\n");
00625                 ret = AVERROR(EINVAL);
00626                 goto free_and_end;
00627             }
00628         }
00629         if (avctx->codec->channel_layouts) {
00630             if (!avctx->channel_layout) {
00631                 av_log(avctx, AV_LOG_WARNING, "channel_layout not specified\n");
00632             } else {
00633                 for (i = 0; avctx->codec->channel_layouts[i] != 0; i++)
00634                     if (avctx->channel_layout == avctx->codec->channel_layouts[i])
00635                         break;
00636                 if (avctx->codec->channel_layouts[i] == 0) {
00637                     av_log(avctx, AV_LOG_ERROR, "Specified channel_layout is not supported\n");
00638                     ret = AVERROR(EINVAL);
00639                     goto free_and_end;
00640                 }
00641             }
00642         }
00643         if (avctx->channel_layout && avctx->channels) {
00644             if (av_get_channel_layout_nb_channels(avctx->channel_layout) != avctx->channels) {
00645                 av_log(avctx, AV_LOG_ERROR, "channel layout does not match number of channels\n");
00646                 ret = AVERROR(EINVAL);
00647                 goto free_and_end;
00648             }
00649         } else if (avctx->channel_layout) {
00650             avctx->channels = av_get_channel_layout_nb_channels(avctx->channel_layout);
00651         }
00652     }
00653 
00654     avctx->pts_correction_num_faulty_pts =
00655     avctx->pts_correction_num_faulty_dts = 0;
00656     avctx->pts_correction_last_pts =
00657     avctx->pts_correction_last_dts = INT64_MIN;
00658 
00659     if(avctx->codec->init && !(avctx->active_thread_type&FF_THREAD_FRAME)){
00660         ret = avctx->codec->init(avctx);
00661         if (ret < 0) {
00662             goto free_and_end;
00663         }
00664     }
00665 
00666     ret=0;
00667 end:
00668     entangled_thread_counter--;
00669 
00670     /* Release any user-supplied mutex. */
00671     if (ff_lockmgr_cb) {
00672         (*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
00673     }
00674     if (options) {
00675         av_dict_free(options);
00676         *options = tmp;
00677     }
00678 
00679     return ret;
00680 free_and_end:
00681     av_dict_free(&tmp);
00682     av_freep(&avctx->priv_data);
00683     avctx->codec= NULL;
00684     goto end;
00685 }
00686 
00687 int attribute_align_arg avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
00688                          const short *samples)
00689 {
00690     if(buf_size < FF_MIN_BUFFER_SIZE && 0){
00691         av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
00692         return -1;
00693     }
00694     if((avctx->codec->capabilities & CODEC_CAP_DELAY) || samples){
00695         int ret = avctx->codec->encode(avctx, buf, buf_size, samples);
00696         avctx->frame_number++;
00697         return ret;
00698     }else
00699         return 0;
00700 }
00701 
00702 int attribute_align_arg avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
00703                          const AVFrame *pict)
00704 {
00705     if(buf_size < FF_MIN_BUFFER_SIZE){
00706         av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
00707         return -1;
00708     }
00709     if(av_image_check_size(avctx->width, avctx->height, 0, avctx))
00710         return -1;
00711     if((avctx->codec->capabilities & CODEC_CAP_DELAY) || pict){
00712         int ret = avctx->codec->encode(avctx, buf, buf_size, pict);
00713         avctx->frame_number++;
00714         emms_c(); //needed to avoid an emms_c() call before every return;
00715 
00716         return ret;
00717     }else
00718         return 0;
00719 }
00720 
00721 int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
00722                             const AVSubtitle *sub)
00723 {
00724     int ret;
00725     if(sub->start_display_time) {
00726         av_log(avctx, AV_LOG_ERROR, "start_display_time must be 0.\n");
00727         return -1;
00728     }
00729 
00730     ret = avctx->codec->encode(avctx, buf, buf_size, sub);
00731     avctx->frame_number++;
00732     return ret;
00733 }
00734 
00745 static int64_t guess_correct_pts(AVCodecContext *ctx,
00746                                  int64_t reordered_pts, int64_t dts)
00747 {
00748     int64_t pts = AV_NOPTS_VALUE;
00749 
00750     if (dts != AV_NOPTS_VALUE) {
00751         ctx->pts_correction_num_faulty_dts += dts <= ctx->pts_correction_last_dts;
00752         ctx->pts_correction_last_dts = dts;
00753     }
00754     if (reordered_pts != AV_NOPTS_VALUE) {
00755         ctx->pts_correction_num_faulty_pts += reordered_pts <= ctx->pts_correction_last_pts;
00756         ctx->pts_correction_last_pts = reordered_pts;
00757     }
00758     if ((ctx->pts_correction_num_faulty_pts<=ctx->pts_correction_num_faulty_dts || dts == AV_NOPTS_VALUE)
00759        && reordered_pts != AV_NOPTS_VALUE)
00760         pts = reordered_pts;
00761     else
00762         pts = dts;
00763 
00764     return pts;
00765 }
00766 
00767 #if FF_API_VIDEO_OLD
00768 int attribute_align_arg avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
00769                          int *got_picture_ptr,
00770                          const uint8_t *buf, int buf_size)
00771 {
00772     AVPacket avpkt;
00773     av_init_packet(&avpkt);
00774     avpkt.data = buf;
00775     avpkt.size = buf_size;
00776     // HACK for CorePNG to decode as normal PNG by default
00777     avpkt.flags = AV_PKT_FLAG_KEY;
00778 
00779     return avcodec_decode_video2(avctx, picture, got_picture_ptr, &avpkt);
00780 }
00781 #endif
00782 
00783 int attribute_align_arg avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
00784                          int *got_picture_ptr,
00785                          AVPacket *avpkt)
00786 {
00787     int ret;
00788 
00789     *got_picture_ptr= 0;
00790     if((avctx->coded_width||avctx->coded_height) && av_image_check_size(avctx->coded_width, avctx->coded_height, 0, avctx))
00791         return -1;
00792 
00793     if((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size || (avctx->active_thread_type&FF_THREAD_FRAME)){
00794         avctx->pkt = avpkt;
00795         if (HAVE_PTHREADS && avctx->active_thread_type&FF_THREAD_FRAME)
00796              ret = ff_thread_decode_frame(avctx, picture, got_picture_ptr,
00797                                           avpkt);
00798         else {
00799             ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
00800                               avpkt);
00801             picture->pkt_dts= avpkt->dts;
00802 
00803             if(!avctx->has_b_frames){
00804             picture->pkt_pos= avpkt->pos;
00805             }
00806             //FIXME these should be under if(!avctx->has_b_frames)
00807             if (!picture->sample_aspect_ratio.num)
00808                 picture->sample_aspect_ratio = avctx->sample_aspect_ratio;
00809             if (!picture->width)
00810                 picture->width = avctx->width;
00811             if (!picture->height)
00812                 picture->height = avctx->height;
00813             if (picture->format == PIX_FMT_NONE)
00814                 picture->format = avctx->pix_fmt;
00815         }
00816 
00817         emms_c(); //needed to avoid an emms_c() call before every return;
00818 
00819 
00820         if (*got_picture_ptr){
00821             avctx->frame_number++;
00822             picture->best_effort_timestamp = guess_correct_pts(avctx,
00823                                                             picture->pkt_pts,
00824                                                             picture->pkt_dts);
00825         }
00826     }else
00827         ret= 0;
00828 
00829     return ret;
00830 }
00831 
00832 #if FF_API_AUDIO_OLD
00833 int attribute_align_arg avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
00834                          int *frame_size_ptr,
00835                          const uint8_t *buf, int buf_size)
00836 {
00837     AVPacket avpkt;
00838     av_init_packet(&avpkt);
00839     avpkt.data = buf;
00840     avpkt.size = buf_size;
00841 
00842     return avcodec_decode_audio3(avctx, samples, frame_size_ptr, &avpkt);
00843 }
00844 #endif
00845 
00846 int attribute_align_arg avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples,
00847                          int *frame_size_ptr,
00848                          AVPacket *avpkt)
00849 {
00850     int ret;
00851 
00852     avctx->pkt = avpkt;
00853 
00854     if (!avpkt->data && avpkt->size) {
00855         av_log(avctx, AV_LOG_ERROR, "invalid packet: NULL data, size != 0\n");
00856         return AVERROR(EINVAL);
00857     }
00858 
00859     if((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size){
00860         //FIXME remove the check below _after_ ensuring that all audio check that the available space is enough
00861         if(*frame_size_ptr < AVCODEC_MAX_AUDIO_FRAME_SIZE){
00862             av_log(avctx, AV_LOG_ERROR, "buffer smaller than AVCODEC_MAX_AUDIO_FRAME_SIZE\n");
00863             return -1;
00864         }
00865         if(*frame_size_ptr < FF_MIN_BUFFER_SIZE ||
00866         *frame_size_ptr < avctx->channels * avctx->frame_size * sizeof(int16_t)){
00867             av_log(avctx, AV_LOG_ERROR, "buffer %d too small\n", *frame_size_ptr);
00868             return -1;
00869         }
00870 
00871         ret = avctx->codec->decode(avctx, samples, frame_size_ptr, avpkt);
00872         avctx->frame_number++;
00873     }else{
00874         ret= 0;
00875         *frame_size_ptr=0;
00876     }
00877     return ret;
00878 }
00879 
00880 #if FF_API_SUBTITLE_OLD
00881 int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
00882                             int *got_sub_ptr,
00883                             const uint8_t *buf, int buf_size)
00884 {
00885     AVPacket avpkt;
00886     av_init_packet(&avpkt);
00887     avpkt.data = buf;
00888     avpkt.size = buf_size;
00889 
00890     return avcodec_decode_subtitle2(avctx, sub, got_sub_ptr, &avpkt);
00891 }
00892 #endif
00893 
00894 int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
00895                             int *got_sub_ptr,
00896                             AVPacket *avpkt)
00897 {
00898     int ret;
00899 
00900     avctx->pkt = avpkt;
00901     *got_sub_ptr = 0;
00902     avcodec_get_subtitle_defaults(sub);
00903     ret = avctx->codec->decode(avctx, sub, got_sub_ptr, avpkt);
00904     if (*got_sub_ptr)
00905         avctx->frame_number++;
00906     return ret;
00907 }
00908 
00909 void avsubtitle_free(AVSubtitle *sub)
00910 {
00911     int i;
00912 
00913     for (i = 0; i < sub->num_rects; i++)
00914     {
00915         av_freep(&sub->rects[i]->pict.data[0]);
00916         av_freep(&sub->rects[i]->pict.data[1]);
00917         av_freep(&sub->rects[i]->pict.data[2]);
00918         av_freep(&sub->rects[i]->pict.data[3]);
00919         av_freep(&sub->rects[i]->text);
00920         av_freep(&sub->rects[i]->ass);
00921         av_freep(&sub->rects[i]);
00922     }
00923 
00924     av_freep(&sub->rects);
00925 
00926     memset(sub, 0, sizeof(AVSubtitle));
00927 }
00928 
00929 av_cold int avcodec_close(AVCodecContext *avctx)
00930 {
00931     /* If there is a user-supplied mutex locking routine, call it. */
00932     if (ff_lockmgr_cb) {
00933         if ((*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
00934             return -1;
00935     }
00936 
00937     entangled_thread_counter++;
00938     if(entangled_thread_counter != 1){
00939         av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
00940         entangled_thread_counter--;
00941         return -1;
00942     }
00943 
00944     if (HAVE_THREADS && avctx->thread_opaque)
00945         ff_thread_free(avctx);
00946     if (avctx->codec && avctx->codec->close)
00947         avctx->codec->close(avctx);
00948     avcodec_default_free_buffers(avctx);
00949     avctx->coded_frame = NULL;
00950     if (avctx->codec && avctx->codec->priv_class)
00951         av_opt_free(avctx->priv_data);
00952     av_opt_free(avctx);
00953     av_freep(&avctx->priv_data);
00954     if(avctx->codec && avctx->codec->encode)
00955         av_freep(&avctx->extradata);
00956     avctx->codec = NULL;
00957     avctx->active_thread_type = 0;
00958     entangled_thread_counter--;
00959 
00960     /* Release any user-supplied mutex. */
00961     if (ff_lockmgr_cb) {
00962         (*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
00963     }
00964     return 0;
00965 }
00966 
00967 AVCodec *avcodec_find_encoder(enum CodecID id)
00968 {
00969     AVCodec *p, *experimental=NULL;
00970     p = first_avcodec;
00971     while (p) {
00972         if (p->encode != NULL && p->id == id) {
00973             if (p->capabilities & CODEC_CAP_EXPERIMENTAL && !experimental) {
00974                 experimental = p;
00975             } else
00976                 return p;
00977         }
00978         p = p->next;
00979     }
00980     return experimental;
00981 }
00982 
00983 AVCodec *avcodec_find_encoder_by_name(const char *name)
00984 {
00985     AVCodec *p;
00986     if (!name)
00987         return NULL;
00988     p = first_avcodec;
00989     while (p) {
00990         if (p->encode != NULL && strcmp(name,p->name) == 0)
00991             return p;
00992         p = p->next;
00993     }
00994     return NULL;
00995 }
00996 
00997 AVCodec *avcodec_find_decoder(enum CodecID id)
00998 {
00999     AVCodec *p, *experimental=NULL;
01000     p = first_avcodec;
01001     while (p) {
01002         if (p->decode != NULL && p->id == id) {
01003             if (p->capabilities & CODEC_CAP_EXPERIMENTAL && !experimental) {
01004                 experimental = p;
01005             } else
01006                 return p;
01007         }
01008         p = p->next;
01009     }
01010     return experimental;
01011 }
01012 
01013 AVCodec *avcodec_find_decoder_by_name(const char *name)
01014 {
01015     AVCodec *p;
01016     if (!name)
01017         return NULL;
01018     p = first_avcodec;
01019     while (p) {
01020         if (p->decode != NULL && strcmp(name,p->name) == 0)
01021             return p;
01022         p = p->next;
01023     }
01024     return NULL;
01025 }
01026 
01027 static int get_bit_rate(AVCodecContext *ctx)
01028 {
01029     int bit_rate;
01030     int bits_per_sample;
01031 
01032     switch(ctx->codec_type) {
01033     case AVMEDIA_TYPE_VIDEO:
01034     case AVMEDIA_TYPE_DATA:
01035     case AVMEDIA_TYPE_SUBTITLE:
01036     case AVMEDIA_TYPE_ATTACHMENT:
01037         bit_rate = ctx->bit_rate;
01038         break;
01039     case AVMEDIA_TYPE_AUDIO:
01040         bits_per_sample = av_get_bits_per_sample(ctx->codec_id);
01041         bit_rate = bits_per_sample ? ctx->sample_rate * ctx->channels * bits_per_sample : ctx->bit_rate;
01042         break;
01043     default:
01044         bit_rate = 0;
01045         break;
01046     }
01047     return bit_rate;
01048 }
01049 
01050 size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag)
01051 {
01052     int i, len, ret = 0;
01053 
01054     for (i = 0; i < 4; i++) {
01055         len = snprintf(buf, buf_size,
01056                        isprint(codec_tag&0xFF) ? "%c" : "[%d]", codec_tag&0xFF);
01057         buf      += len;
01058         buf_size  = buf_size > len ? buf_size - len : 0;
01059         ret      += len;
01060         codec_tag>>=8;
01061     }
01062     return ret;
01063 }
01064 
01065 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
01066 {
01067     const char *codec_name;
01068     const char *profile = NULL;
01069     AVCodec *p;
01070     char buf1[32];
01071     int bitrate;
01072     AVRational display_aspect_ratio;
01073 
01074     if (encode)
01075         p = avcodec_find_encoder(enc->codec_id);
01076     else
01077         p = avcodec_find_decoder(enc->codec_id);
01078 
01079     if (p) {
01080         codec_name = p->name;
01081         profile = av_get_profile_name(p, enc->profile);
01082     } else if (enc->codec_id == CODEC_ID_MPEG2TS) {
01083         /* fake mpeg2 transport stream codec (currently not
01084            registered) */
01085         codec_name = "mpeg2ts";
01086     } else if (enc->codec_name[0] != '\0') {
01087         codec_name = enc->codec_name;
01088     } else {
01089         /* output avi tags */
01090         char tag_buf[32];
01091         av_get_codec_tag_string(tag_buf, sizeof(tag_buf), enc->codec_tag);
01092         snprintf(buf1, sizeof(buf1), "%s / 0x%04X", tag_buf, enc->codec_tag);
01093         codec_name = buf1;
01094     }
01095 
01096     switch(enc->codec_type) {
01097     case AVMEDIA_TYPE_VIDEO:
01098         snprintf(buf, buf_size,
01099                  "Video: %s%s",
01100                  codec_name, enc->mb_decision ? " (hq)" : "");
01101         if (profile)
01102             snprintf(buf + strlen(buf), buf_size - strlen(buf),
01103                      " (%s)", profile);
01104         if (enc->pix_fmt != PIX_FMT_NONE) {
01105             snprintf(buf + strlen(buf), buf_size - strlen(buf),
01106                      ", %s",
01107                      av_get_pix_fmt_name(enc->pix_fmt));
01108         }
01109         if (enc->width) {
01110             snprintf(buf + strlen(buf), buf_size - strlen(buf),
01111                      ", %dx%d",
01112                      enc->width, enc->height);
01113             if (enc->sample_aspect_ratio.num) {
01114                 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
01115                           enc->width*enc->sample_aspect_ratio.num,
01116                           enc->height*enc->sample_aspect_ratio.den,
01117                           1024*1024);
01118                 snprintf(buf + strlen(buf), buf_size - strlen(buf),
01119                          " [PAR %d:%d DAR %d:%d]",
01120                          enc->sample_aspect_ratio.num, enc->sample_aspect_ratio.den,
01121                          display_aspect_ratio.num, display_aspect_ratio.den);
01122             }
01123             if(av_log_get_level() >= AV_LOG_DEBUG){
01124                 int g= av_gcd(enc->time_base.num, enc->time_base.den);
01125                 snprintf(buf + strlen(buf), buf_size - strlen(buf),
01126                      ", %d/%d",
01127                      enc->time_base.num/g, enc->time_base.den/g);
01128             }
01129         }
01130         if (encode) {
01131             snprintf(buf + strlen(buf), buf_size - strlen(buf),
01132                      ", q=%d-%d", enc->qmin, enc->qmax);
01133         }
01134         break;
01135     case AVMEDIA_TYPE_AUDIO:
01136         snprintf(buf, buf_size,
01137                  "Audio: %s",
01138                  codec_name);
01139         if (profile)
01140             snprintf(buf + strlen(buf), buf_size - strlen(buf),
01141                      " (%s)", profile);
01142         if (enc->sample_rate) {
01143             snprintf(buf + strlen(buf), buf_size - strlen(buf),
01144                      ", %d Hz", enc->sample_rate);
01145         }
01146         av_strlcat(buf, ", ", buf_size);
01147         av_get_channel_layout_string(buf + strlen(buf), buf_size - strlen(buf), enc->channels, enc->channel_layout);
01148         if (enc->sample_fmt != AV_SAMPLE_FMT_NONE) {
01149             snprintf(buf + strlen(buf), buf_size - strlen(buf),
01150                      ", %s", av_get_sample_fmt_name(enc->sample_fmt));
01151         }
01152         break;
01153     case AVMEDIA_TYPE_DATA:
01154         snprintf(buf, buf_size, "Data: %s", codec_name);
01155         break;
01156     case AVMEDIA_TYPE_SUBTITLE:
01157         snprintf(buf, buf_size, "Subtitle: %s", codec_name);
01158         break;
01159     case AVMEDIA_TYPE_ATTACHMENT:
01160         snprintf(buf, buf_size, "Attachment: %s", codec_name);
01161         break;
01162     default:
01163         snprintf(buf, buf_size, "Invalid Codec type %d", enc->codec_type);
01164         return;
01165     }
01166     if (encode) {
01167         if (enc->flags & CODEC_FLAG_PASS1)
01168             snprintf(buf + strlen(buf), buf_size - strlen(buf),
01169                      ", pass 1");
01170         if (enc->flags & CODEC_FLAG_PASS2)
01171             snprintf(buf + strlen(buf), buf_size - strlen(buf),
01172                      ", pass 2");
01173     }
01174     bitrate = get_bit_rate(enc);
01175     if (bitrate != 0) {
01176         snprintf(buf + strlen(buf), buf_size - strlen(buf),
01177                  ", %d kb/s", bitrate / 1000);
01178     }
01179 }
01180 
01181 const char *av_get_profile_name(const AVCodec *codec, int profile)
01182 {
01183     const AVProfile *p;
01184     if (profile == FF_PROFILE_UNKNOWN || !codec->profiles)
01185         return NULL;
01186 
01187     for (p = codec->profiles; p->profile != FF_PROFILE_UNKNOWN; p++)
01188         if (p->profile == profile)
01189             return p->name;
01190 
01191     return NULL;
01192 }
01193 
01194 unsigned avcodec_version( void )
01195 {
01196   return LIBAVCODEC_VERSION_INT;
01197 }
01198 
01199 const char *avcodec_configuration(void)
01200 {
01201     return FFMPEG_CONFIGURATION;
01202 }
01203 
01204 const char *avcodec_license(void)
01205 {
01206 #define LICENSE_PREFIX "libavcodec license: "
01207     return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
01208 }
01209 
01210 void avcodec_init(void)
01211 {
01212     static int initialized = 0;
01213 
01214     if (initialized != 0)
01215         return;
01216     initialized = 1;
01217 
01218     dsputil_static_init();
01219 }
01220 
01221 void avcodec_flush_buffers(AVCodecContext *avctx)
01222 {
01223     if(HAVE_PTHREADS && avctx->active_thread_type&FF_THREAD_FRAME)
01224         ff_thread_flush(avctx);
01225     else if(avctx->codec->flush)
01226         avctx->codec->flush(avctx);
01227 }
01228 
01229 void avcodec_default_free_buffers(AVCodecContext *s){
01230     int i, j;
01231 
01232     if(s->internal_buffer==NULL) return;
01233 
01234     if (s->internal_buffer_count)
01235         av_log(s, AV_LOG_WARNING, "Found %i unreleased buffers!\n", s->internal_buffer_count);
01236     for(i=0; i<INTERNAL_BUFFER_SIZE; i++){
01237         InternalBuffer *buf= &((InternalBuffer*)s->internal_buffer)[i];
01238         for(j=0; j<4; j++){
01239             av_freep(&buf->base[j]);
01240             buf->data[j]= NULL;
01241         }
01242     }
01243     av_freep(&s->internal_buffer);
01244 
01245     s->internal_buffer_count=0;
01246 }
01247 
01248 #if FF_API_OLD_FF_PICT_TYPES
01249 char av_get_pict_type_char(int pict_type){
01250     return av_get_picture_type_char(pict_type);
01251 }
01252 #endif
01253 
01254 int av_get_bits_per_sample(enum CodecID codec_id){
01255     switch(codec_id){
01256     case CODEC_ID_ADPCM_SBPRO_2:
01257         return 2;
01258     case CODEC_ID_ADPCM_SBPRO_3:
01259         return 3;
01260     case CODEC_ID_ADPCM_SBPRO_4:
01261     case CODEC_ID_ADPCM_CT:
01262     case CODEC_ID_ADPCM_IMA_WAV:
01263     case CODEC_ID_ADPCM_MS:
01264     case CODEC_ID_ADPCM_YAMAHA:
01265         return 4;
01266     case CODEC_ID_ADPCM_G722:
01267     case CODEC_ID_PCM_ALAW:
01268     case CODEC_ID_PCM_MULAW:
01269     case CODEC_ID_PCM_S8:
01270     case CODEC_ID_PCM_U8:
01271     case CODEC_ID_PCM_ZORK:
01272         return 8;
01273     case CODEC_ID_PCM_S16BE:
01274     case CODEC_ID_PCM_S16LE:
01275     case CODEC_ID_PCM_S16LE_PLANAR:
01276     case CODEC_ID_PCM_U16BE:
01277     case CODEC_ID_PCM_U16LE:
01278         return 16;
01279     case CODEC_ID_PCM_S24DAUD:
01280     case CODEC_ID_PCM_S24BE:
01281     case CODEC_ID_PCM_S24LE:
01282     case CODEC_ID_PCM_U24BE:
01283     case CODEC_ID_PCM_U24LE:
01284         return 24;
01285     case CODEC_ID_PCM_S32BE:
01286     case CODEC_ID_PCM_S32LE:
01287     case CODEC_ID_PCM_U32BE:
01288     case CODEC_ID_PCM_U32LE:
01289     case CODEC_ID_PCM_F32BE:
01290     case CODEC_ID_PCM_F32LE:
01291         return 32;
01292     case CODEC_ID_PCM_F64BE:
01293     case CODEC_ID_PCM_F64LE:
01294         return 64;
01295     default:
01296         return 0;
01297     }
01298 }
01299 
01300 #if FF_API_OLD_SAMPLE_FMT
01301 int av_get_bits_per_sample_format(enum AVSampleFormat sample_fmt) {
01302     return av_get_bytes_per_sample(sample_fmt) << 3;
01303 }
01304 #endif
01305 
01306 #if !HAVE_THREADS
01307 int ff_thread_init(AVCodecContext *s){
01308     return -1;
01309 }
01310 #endif
01311 
01312 unsigned int av_xiphlacing(unsigned char *s, unsigned int v)
01313 {
01314     unsigned int n = 0;
01315 
01316     while(v >= 0xff) {
01317         *s++ = 0xff;
01318         v -= 0xff;
01319         n++;
01320     }
01321     *s = v;
01322     n++;
01323     return n;
01324 }
01325 
01326 #if LIBAVCODEC_VERSION_MAJOR < 53
01327 #include "libavutil/parseutils.h"
01328 
01329 int av_parse_video_frame_size(int *width_ptr, int *height_ptr, const char *str)
01330 {
01331     return av_parse_video_size(width_ptr, height_ptr, str);
01332 }
01333 
01334 int av_parse_video_frame_rate(AVRational *frame_rate, const char *arg)
01335 {
01336     return av_parse_video_rate(frame_rate, arg);
01337 }
01338 #endif
01339 
01340 int ff_match_2uint16(const uint16_t (*tab)[2], int size, int a, int b){
01341     int i;
01342     for(i=0; i<size && !(tab[i][0]==a && tab[i][1]==b); i++);
01343     return i;
01344 }
01345 
01346 void av_log_missing_feature(void *avc, const char *feature, int want_sample)
01347 {
01348     av_log(avc, AV_LOG_WARNING, "%s not implemented. Update your FFmpeg "
01349             "version to the newest one from Git. If the problem still "
01350             "occurs, it means that your file has a feature which has not "
01351             "been implemented.\n", feature);
01352     if(want_sample)
01353         av_log_ask_for_sample(avc, NULL);
01354 }
01355 
01356 void av_log_ask_for_sample(void *avc, const char *msg, ...)
01357 {
01358     va_list argument_list;
01359 
01360     va_start(argument_list, msg);
01361 
01362     if (msg)
01363         av_vlog(avc, AV_LOG_WARNING, msg, argument_list);
01364     av_log(avc, AV_LOG_WARNING, "If you want to help, upload a sample "
01365             "of this file to ftp://upload.ffmpeg.org/MPlayer/incoming/ "
01366             "and contact the ffmpeg-devel mailing list.\n");
01367 
01368     va_end(argument_list);
01369 }
01370 
01371 static AVHWAccel *first_hwaccel = NULL;
01372 
01373 void av_register_hwaccel(AVHWAccel *hwaccel)
01374 {
01375     AVHWAccel **p = &first_hwaccel;
01376     while (*p)
01377         p = &(*p)->next;
01378     *p = hwaccel;
01379     hwaccel->next = NULL;
01380 }
01381 
01382 AVHWAccel *av_hwaccel_next(AVHWAccel *hwaccel)
01383 {
01384     return hwaccel ? hwaccel->next : first_hwaccel;
01385 }
01386 
01387 AVHWAccel *ff_find_hwaccel(enum CodecID codec_id, enum PixelFormat pix_fmt)
01388 {
01389     AVHWAccel *hwaccel=NULL;
01390 
01391     while((hwaccel= av_hwaccel_next(hwaccel))){
01392         if (   hwaccel->id      == codec_id
01393             && hwaccel->pix_fmt == pix_fmt)
01394             return hwaccel;
01395     }
01396     return NULL;
01397 }
01398 
01399 int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op))
01400 {
01401     if (ff_lockmgr_cb) {
01402         if (ff_lockmgr_cb(&codec_mutex, AV_LOCK_DESTROY))
01403             return -1;
01404     }
01405 
01406     ff_lockmgr_cb = cb;
01407 
01408     if (ff_lockmgr_cb) {
01409         if (ff_lockmgr_cb(&codec_mutex, AV_LOCK_CREATE))
01410             return -1;
01411     }
01412     return 0;
01413 }
01414 
01415 unsigned int ff_toupper4(unsigned int x)
01416 {
01417     return     toupper( x     &0xFF)
01418             + (toupper((x>>8 )&0xFF)<<8 )
01419             + (toupper((x>>16)&0xFF)<<16)
01420             + (toupper((x>>24)&0xFF)<<24);
01421 }
01422 
01423 #if !HAVE_PTHREADS
01424 
01425 int ff_thread_get_buffer(AVCodecContext *avctx, AVFrame *f)
01426 {
01427     f->owner = avctx;
01428     return avctx->get_buffer(avctx, f);
01429 }
01430 
01431 void ff_thread_release_buffer(AVCodecContext *avctx, AVFrame *f)
01432 {
01433     f->owner->release_buffer(f->owner, f);
01434 }
01435 
01436 void ff_thread_finish_setup(AVCodecContext *avctx)
01437 {
01438 }
01439 
01440 void ff_thread_report_progress(AVFrame *f, int progress, int field)
01441 {
01442 }
01443 
01444 void ff_thread_await_progress(AVFrame *f, int progress, int field)
01445 {
01446 }
01447 
01448 #endif
01449 
01450 #if FF_API_THREAD_INIT
01451 int avcodec_thread_init(AVCodecContext *s, int thread_count)
01452 {
01453     s->thread_count = thread_count;
01454     return ff_thread_init(s);
01455 }
01456 
01457 void avcodec_thread_free(AVCodecContext *s)
01458 {
01459 #if HAVE_THREADS
01460     ff_thread_free(s);
01461 #endif
01462 }
01463 
01464 #endif

Generated on Wed Apr 11 2012 07:31:35 for FFmpeg by  doxygen 1.7.1