libavcodec/utils.c

   1 /*
   2  * utils for libavcodec
   3  * Copyright (c) 2001 Fabrice Bellard
   4  * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
   5  *
   6  * This file is part of FFmpeg.
   7  *
   8  * FFmpeg is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * FFmpeg is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with FFmpeg; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  21  */
  22
  23 /**
  24  * @file
  25  * utils.
  26  */
  27
  28 #include "libavutil/avstring.h"
  29 #include "libavutil/integer.h"
  30 #include "libavutil/crc.h"
  31 #include "libavutil/pixdesc.h"
  32 #include "libavutil/audioconvert.h"
  33 #include "libavutil/imgutils.h"
  34 #include "libavutil/samplefmt.h"
  35 #include "avcodec.h"
  36 #include "dsputil.h"
  37 #include "libavutil/opt.h"
  38 #include "imgconvert.h"
  39 #include "thread.h"
  40 #include "audioconvert.h"
  41 #include "internal.h"
  42 #include <stdlib.h>
  43 #include <stdarg.h>
  44 #include <limits.h>
  45 #include <float.h>
  46
  47 static int volatile entangled_thread_counter=0;
  48 static int (*ff_lockmgr_cb)(void **mutex, enum AVLockOp op);
  49 static void *codec_mutex;
  50
  51 void *av_fast_realloc(void *ptr, unsigned int *size, FF_INTERNALC_MEM_TYPE min_size)
  52 {
  53     if(min_size < *size)
  54         return ptr;
  55
  56     min_size= FFMAX(17*min_size/16 + 32, min_size);
  57
  58     ptr= av_realloc(ptr, min_size);
  59     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
  60         min_size= 0;
  61
  62     *size= min_size;
  63
  64     return ptr;
  65 }
  66
  67 void av_fast_malloc(void *ptr, unsigned int *size, FF_INTERNALC_MEM_TYPE min_size)
  68 {
  69     void **p = ptr;
  70     if (min_size < *size)
  71         return;
  72     min_size= FFMAX(17*min_size/16 + 32, min_size);
  73     av_free(*p);
  74     *p = av_malloc(min_size);
  75     if (!*p) min_size = 0;
  76     *size= min_size;
  77 }
  78
  79 /* encoder management */
  80 static AVCodec *first_avcodec = NULL;
  81
  82 AVCodec *av_codec_next(AVCodec *c){
  83     if(c) return c->next;
  84     else  return first_avcodec;
  85 }
  86
  87 void avcodec_register(AVCodec *codec)
  88 {
  89     AVCodec **p;
  90     avcodec_init();
  91     p = &first_avcodec;
  92     while (*p != NULL) p = &(*p)->next;
  93     *p = codec;
  94     codec->next = NULL;
  95 }
  96
  97 #if LIBAVCODEC_VERSION_MAJOR < 53
  98 void register_avcodec(AVCodec *codec)
  99 {
 100     avcodec_register(codec);
 101 }
 102 #endif
 103
 104 unsigned avcodec_get_edge_width(void)
 105 {
 106     return EDGE_WIDTH;
 107 }
 108
 109 void avcodec_set_dimensions(AVCodecContext *s, int width, int height){
 110     s->coded_width = width;
 111     s->coded_height= height;
 112     s->width = -((-width )>>s->lowres);
 113     s->height= -((-height)>>s->lowres);
 114 }
 115
 116 typedef struct InternalBuffer{
 117     int last_pic_num;
 118     uint8_t *base[4];
 119     uint8_t *data[4];
 120     int linesize[4];
 121     int width, height;
 122     enum PixelFormat pix_fmt;
 123 }InternalBuffer;
 124
 125 #define INTERNAL_BUFFER_SIZE 32
 126
 127 void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height, int linesize_align[4]){
 128     int w_align= 1;
 129     int h_align= 1;
 130
 131     switch(s->pix_fmt){
 132     case PIX_FMT_YUV420P:
 133     case PIX_FMT_YUYV422:
 134     case PIX_FMT_UYVY422:
 135     case PIX_FMT_YUV422P:
 136     case PIX_FMT_YUV440P:
 137     case PIX_FMT_YUV444P:
 138     case PIX_FMT_GRAY8:
 139     case PIX_FMT_GRAY16BE:
 140     case PIX_FMT_GRAY16LE:
 141     case PIX_FMT_YUVJ420P:
 142     case PIX_FMT_YUVJ422P:
 143     case PIX_FMT_YUVJ440P:
 144     case PIX_FMT_YUVJ444P:
 145     case PIX_FMT_YUVA420P:
 146         w_align= 16; //FIXME check for non mpeg style codecs and use less alignment
 147         h_align= 16;
 148         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)
 149             h_align= 32; // interlaced is rounded up to 2 MBs
 150         break;
 151     case PIX_FMT_YUV411P:
 152     case PIX_FMT_UYYVYY411:
 153         w_align=32;
 154         h_align=8;
 155         break;
 156     case PIX_FMT_YUV410P:
 157         if(s->codec_id == CODEC_ID_SVQ1){
 158             w_align=64;
 159             h_align=64;
 160         }
 161     case PIX_FMT_RGB555:
 162         if(s->codec_id == CODEC_ID_RPZA){
 163             w_align=4;
 164             h_align=4;
 165         }
 166     case PIX_FMT_PAL8:
 167     case PIX_FMT_BGR8:
 168     case PIX_FMT_RGB8:
 169         if(s->codec_id == CODEC_ID_SMC){
 170             w_align=4;
 171             h_align=4;
 172         }
 173         break;
 174     case PIX_FMT_BGR24:
 175         if((s->codec_id == CODEC_ID_MSZH) || (s->codec_id == CODEC_ID_ZLIB)){
 176             w_align=4;
 177             h_align=4;
 178         }
 179         break;
 180     default:
 181         w_align= 1;
 182         h_align= 1;
 183         break;
 184     }
 185
 186     *width = FFALIGN(*width , w_align);
 187     *height= FFALIGN(*height, h_align);
 188     if(s->codec_id == CODEC_ID_H264 || s->lowres)
 189         *height+=2; // some of the optimized chroma MC reads one line too much
 190                     // which is also done in mpeg decoders with lowres > 0
 191
 192     linesize_align[0] =
 193     linesize_align[1] =
 194     linesize_align[2] =
 195     linesize_align[3] = STRIDE_ALIGN;
 196 //STRIDE_ALIGN is 8 for SSE* but this does not work for SVQ1 chroma planes
 197 //we could change STRIDE_ALIGN to 16 for x86/sse but it would increase the
 198 //picture size unneccessarily in some cases. The solution here is not
 199 //pretty and better ideas are welcome!
 200 #if HAVE_MMX
 201     if(s->codec_id == CODEC_ID_SVQ1 || s->codec_id == CODEC_ID_VP5 ||
 202        s->codec_id == CODEC_ID_VP6 || s->codec_id == CODEC_ID_VP6F ||
 203        s->codec_id == CODEC_ID_VP6A) {
 204         linesize_align[0] =
 205         linesize_align[1] =
 206         linesize_align[2] = 16;
 207     }
 208 #endif
 209 }
 210
 211 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height){
 212     int chroma_shift = av_pix_fmt_descriptors[s->pix_fmt].log2_chroma_w;
 213     int linesize_align[4];
 214     int align;
 215     avcodec_align_dimensions2(s, width, height, linesize_align);
 216     align = FFMAX(linesize_align[0], linesize_align[3]);
 217     linesize_align[1] <<= chroma_shift;
 218     linesize_align[2] <<= chroma_shift;
 219     align = FFMAX3(align, linesize_align[1], linesize_align[2]);
 220     *width=FFALIGN(*width, align);
 221 }
 222
 223 #if LIBAVCODEC_VERSION_MAJOR < 53
 224 int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h){
 225     return av_image_check_size(w, h, 0, av_log_ctx);
 226 }
 227 #endif
 228
 229 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic){
 230     int i;
 231     int w= s->width;
 232     int h= s->height;
 233     InternalBuffer *buf;
 234     int *picture_number;
 235
 236     if(pic->data[0]!=NULL) {
 237         av_log(s, AV_LOG_ERROR, "pic->data[0]!=NULL in avcodec_default_get_buffer\n");
 238         return -1;
 239     }
 240     if(s->internal_buffer_count >= INTERNAL_BUFFER_SIZE) {
 241         av_log(s, AV_LOG_ERROR, "internal_buffer_count overflow (missing release_buffer?)\n");
 242         return -1;
 243     }
 244
 245     if(av_image_check_size(w, h, 0, s))
 246         return -1;
 247
 248     if(s->internal_buffer==NULL){
 249         s->internal_buffer= av_mallocz((INTERNAL_BUFFER_SIZE+1)*sizeof(InternalBuffer));
 250     }
 251 #if 0
 252     s->internal_buffer= av_fast_realloc(
 253         s->internal_buffer,
 254         &s->internal_buffer_size,
 255         sizeof(InternalBuffer)*FFMAX(99,  s->internal_buffer_count+1)/*FIXME*/
 256         );
 257 #endif
 258
 259     buf= &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
 260     picture_number= &(((InternalBuffer*)s->internal_buffer)[INTERNAL_BUFFER_SIZE]).last_pic_num; //FIXME ugly hack
 261     (*picture_number)++;
 262
 263     if(buf->base[0] && (buf->width != w || buf->height != h || buf->pix_fmt != s->pix_fmt)){
 264         if(s->active_thread_type&FF_THREAD_FRAME) {
 265             av_log_missing_feature(s, "Width/height changing with frame threads is", 0);
 266             return -1;
 267         }
 268
 269         for(i=0; i<4; i++){
 270             av_freep(&buf->base[i]);
 271             buf->data[i]= NULL;
 272         }
 273     }
 274
 275     if(buf->base[0]){
 276         pic->age= *picture_number - buf->last_pic_num;
 277         buf->last_pic_num= *picture_number;
 278     }else{
 279         int h_chroma_shift, v_chroma_shift;
 280         int size[4] = {0};
 281         int tmpsize;
 282         int unaligned;
 283         AVPicture picture;
 284         int stride_align[4];
 285
 286         avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
 287
 288         avcodec_align_dimensions2(s, &w, &h, stride_align);
 289
 290         if(!(s->flags&CODEC_FLAG_EMU_EDGE)){
 291             w+= EDGE_WIDTH*2;
 292             h+= EDGE_WIDTH*2;
 293         }
 294
 295         do {
 296             // NOTE: do not align linesizes individually, this breaks e.g. assumptions
 297             // that linesize[0] == 2*linesize[1] in the MPEG-encoder for 4:2:2
 298             av_image_fill_linesizes(picture.linesize, s->pix_fmt, w);
 299             // increase alignment of w for next try (rhs gives the lowest bit set in w)
 300             w += w & ~(w-1);
 301
 302             unaligned = 0;
 303             for (i=0; i<4; i++){
 304                 unaligned |= picture.linesize[i] % stride_align[i];
 305             }
 306         } while (unaligned);
 307
 308         tmpsize = av_image_fill_pointers(picture.data, s->pix_fmt, h, NULL, picture.linesize);
 309         if (tmpsize < 0)
 310             return -1;
 311
 312         for (i=0; i<3 && picture.data[i+1]; i++)
 313             size[i] = picture.data[i+1] - picture.data[i];
 314         size[i] = tmpsize - (picture.data[i] - picture.data[0]);
 315
 316         buf->last_pic_num= -256*256*256*64;
 317         memset(buf->base, 0, sizeof(buf->base));
 318         memset(buf->data, 0, sizeof(buf->data));
 319
 320         for(i=0; i<4 && size[i]; i++){
 321             const int h_shift= i==0 ? 0 : h_chroma_shift;
 322             const int v_shift= i==0 ? 0 : v_chroma_shift;
 323
 324             buf->linesize[i]= picture.linesize[i];
 325
 326             buf->base[i]= av_malloc(size[i]+16); //FIXME 16
 327             if(buf->base[i]==NULL) return -1;
 328             memset(buf->base[i], 128, size[i]);
 329
 330             // no edge if EDGE EMU or not planar YUV
 331             if((s->flags&CODEC_FLAG_EMU_EDGE) || !size[2])
 332                 buf->data[i] = buf->base[i];
 333             else
 334                 buf->data[i] = buf->base[i] + FFALIGN((buf->linesize[i]*EDGE_WIDTH>>v_shift) + (EDGE_WIDTH>>h_shift), stride_align[i]);
 335         }
 336         if(size[1] && !size[2])
 337             ff_set_systematic_pal2((uint32_t*)buf->data[1], s->pix_fmt);
 338         buf->width  = s->width;
 339         buf->height = s->height;
 340         buf->pix_fmt= s->pix_fmt;
 341         pic->age= 256*256*256*64;
 342     }
 343     pic->type= FF_BUFFER_TYPE_INTERNAL;
 344
 345     for(i=0; i<4; i++){
 346         pic->base[i]= buf->base[i];
 347         pic->data[i]= buf->data[i];
 348         pic->linesize[i]= buf->linesize[i];
 349     }
 350     s->internal_buffer_count++;
 351
 352     if(s->pkt) pic->pkt_pts= s->pkt->pts;
 353     else       pic->pkt_pts= AV_NOPTS_VALUE;
 354     pic->reordered_opaque= s->reordered_opaque;
 355
 356     if(s->debug&FF_DEBUG_BUFFERS)
 357         av_log(s, AV_LOG_DEBUG, "default_get_buffer called on pic %p, %d buffers used\n", pic, s->internal_buffer_count);
 358
 359     return 0;
 360 }
 361
 362 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic){
 363     int i;
 364     InternalBuffer *buf, *last;
 365
 366     assert(pic->type==FF_BUFFER_TYPE_INTERNAL);
 367     assert(s->internal_buffer_count);
 368
 369     buf = NULL; /* avoids warning */
 370     for(i=0; i<s->internal_buffer_count; i++){ //just 3-5 checks so is not worth to optimize
 371         buf= &((InternalBuffer*)s->internal_buffer)[i];
 372         if(buf->data[0] == pic->data[0])
 373             break;
 374     }
 375     assert(i < s->internal_buffer_count);
 376     s->internal_buffer_count--;
 377     last = &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
 378
 379     FFSWAP(InternalBuffer, *buf, *last);
 380
 381     for(i=0; i<4; i++){
 382         pic->data[i]=NULL;
 383 //        pic->base[i]=NULL;
 384     }
 385 //printf("R%X\n", pic->opaque);
 386
 387     if(s->debug&FF_DEBUG_BUFFERS)
 388         av_log(s, AV_LOG_DEBUG, "default_release_buffer called on pic %p, %d buffers used\n", pic, s->internal_buffer_count);
 389 }
 390
 391 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic){
 392     AVFrame temp_pic;
 393     int i;
 394
 395     /* If no picture return a new buffer */
 396     if(pic->data[0] == NULL) {
 397         /* We will copy from buffer, so must be readable */
 398         pic->buffer_hints |= FF_BUFFER_HINTS_READABLE;
 399         return s->get_buffer(s, pic);
 400     }
 401
 402     /* If internal buffer type return the same buffer */
 403     if(pic->type == FF_BUFFER_TYPE_INTERNAL) {
 404         if(s->pkt) pic->pkt_pts= s->pkt->pts;
 405         else       pic->pkt_pts= AV_NOPTS_VALUE;
 406         pic->reordered_opaque= s->reordered_opaque;
 407         return 0;
 408     }
 409
 410     /*
 411      * Not internal type and reget_buffer not overridden, emulate cr buffer
 412      */
 413     temp_pic = *pic;
 414     for(i = 0; i < 4; i++)
 415         pic->data[i] = pic->base[i] = NULL;
 416     pic->opaque = NULL;
 417     /* Allocate new frame */
 418     if (s->get_buffer(s, pic))
 419         return -1;
 420     /* Copy image data from old buffer to new buffer */
 421     av_picture_copy((AVPicture*)pic, (AVPicture*)&temp_pic, s->pix_fmt, s->width,
 422              s->height);
 423     s->release_buffer(s, &temp_pic); // Release old frame
 424     return 0;
 425 }
 426
 427 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size){
 428     int i;
 429
 430     for(i=0; i<count; i++){
 431         int r= func(c, (char*)arg + i*size);
 432         if(ret) ret[i]= r;
 433     }
 434     return 0;
 435 }
 436
 437 int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int jobnr, int threadnr),void *arg, int *ret, int count){
 438     int i;
 439
 440     for(i=0; i<count; i++){
 441         int r= func(c, arg, i, 0);
 442         if(ret) ret[i]= r;
 443     }
 444     return 0;
 445 }
 446
 447 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat *fmt){
 448     while (*fmt != PIX_FMT_NONE && ff_is_hwaccel_pix_fmt(*fmt))
 449         ++fmt;
 450     return fmt[0];
 451 }
 452
 453 void avcodec_get_frame_defaults(AVFrame *pic){
 454     memset(pic, 0, sizeof(AVFrame));
 455
 456     pic->pts= AV_NOPTS_VALUE;
 457     pic->key_frame= 1;
 458 }
 459
 460 AVFrame *avcodec_alloc_frame(void){
 461     AVFrame *pic= av_malloc(sizeof(AVFrame));
 462
 463     if(pic==NULL) return NULL;
 464
 465     avcodec_get_frame_defaults(pic);
 466
 467     return pic;
 468 }
 469
 470 int attribute_align_arg avcodec_open(AVCodecContext *avctx, AVCodec *codec)
 471 {
 472     int ret= -1;
 473
 474     /* If there is a user-supplied mutex locking routine, call it. */
 475     if (ff_lockmgr_cb) {
 476         if ((*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
 477             return -1;
 478     }
 479
 480     entangled_thread_counter++;
 481     if(entangled_thread_counter != 1){
 482         av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
 483         goto end;
 484     }
 485
 486     if(avctx->codec || !codec)
 487         goto end;
 488
 489     if (codec->priv_data_size > 0) {
 490       if(!avctx->priv_data){
 491         avctx->priv_data = av_mallocz(codec->priv_data_size);
 492         if (!avctx->priv_data) {
 493             ret = AVERROR(ENOMEM);
 494             goto end;
 495         }
 496         if(codec->priv_class){ //this can be droped once all user apps use   avcodec_get_context_defaults3()
 497             *(AVClass**)avctx->priv_data= codec->priv_class;
 498             av_opt_set_defaults(avctx->priv_data);
 499         }
 500       }
 501     } else {
 502         avctx->priv_data = NULL;
 503     }
 504
 505     if(avctx->coded_width && avctx->coded_height)
 506         avcodec_set_dimensions(avctx, avctx->coded_width, avctx->coded_height);
 507     else if(avctx->width && avctx->height)
 508         avcodec_set_dimensions(avctx, avctx->width, avctx->height);
 509
 510     if ((avctx->coded_width || avctx->coded_height || avctx->width || avctx->height)
 511         && (  av_image_check_size(avctx->coded_width, avctx->coded_height, 0, avctx) < 0
 512            || av_image_check_size(avctx->width,       avctx->height,       0, avctx) < 0)) {
 513         av_log(avctx, AV_LOG_WARNING, "ignoring invalid width/height values\n");
 514         avcodec_set_dimensions(avctx, 0, 0);
 515     }
 516
 517     /* if the decoder init function was already called previously,
 518        free the already allocated subtitle_header before overwriting it */
 519     if (codec->decode)
 520         av_freep(&avctx->subtitle_header);
 521
 522 #define SANE_NB_CHANNELS 128U
 523     if (avctx->channels > SANE_NB_CHANNELS) {
 524         ret = AVERROR(EINVAL);
 525         goto free_and_end;
 526     }
 527
 528     avctx->codec = codec;
 529     if ((avctx->codec_type == AVMEDIA_TYPE_UNKNOWN || avctx->codec_type == codec->type) &&
 530         avctx->codec_id == CODEC_ID_NONE) {
 531         avctx->codec_type = codec->type;
 532         avctx->codec_id   = codec->id;
 533     }
 534     if (avctx->codec_id != codec->id || (avctx->codec_type != codec->type
 535                            && avctx->codec_type != AVMEDIA_TYPE_ATTACHMENT)) {
 536         av_log(avctx, AV_LOG_ERROR, "codec type or id mismatches\n");
 537         goto free_and_end;
 538     }
 539     avctx->frame_number = 0;
 540
 541     if (HAVE_THREADS && !avctx->thread_opaque) {
 542         ret = ff_thread_init(avctx, avctx->thread_count);
 543         if (ret < 0) {
 544             goto free_and_end;
 545         }
 546     }
 547
 548     if (avctx->codec->max_lowres < avctx->lowres) {
 549         av_log(avctx, AV_LOG_ERROR, "The maximum value for lowres supported by the decoder is %d\n",
 550                avctx->codec->max_lowres);
 551         goto free_and_end;
 552     }
 553     if (avctx->codec->sample_fmts && avctx->codec->encode) {
 554         int i;
 555         for (i = 0; avctx->codec->sample_fmts[i] != AV_SAMPLE_FMT_NONE; i++)
 556             if (avctx->sample_fmt == avctx->codec->sample_fmts[i])
 557                 break;
 558         if (avctx->codec->sample_fmts[i] == AV_SAMPLE_FMT_NONE) {
 559             av_log(avctx, AV_LOG_ERROR, "Specified sample_fmt is not supported.\n");
 560             goto free_and_end;
 561         }
 562     }
 563
 564     if(avctx->codec->init && !(avctx->active_thread_type&FF_THREAD_FRAME)){
 565         ret = avctx->codec->init(avctx);
 566         if (ret < 0) {
 567             goto free_and_end;
 568         }
 569     }
 570     ret=0;
 571 end:
 572     entangled_thread_counter--;
 573
 574     /* Release any user-supplied mutex. */
 575     if (ff_lockmgr_cb) {
 576         (*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
 577     }
 578     return ret;
 579 free_and_end:
 580     av_freep(&avctx->priv_data);
 581     avctx->codec= NULL;
 582     goto end;
 583 }
 584
 585 int attribute_align_arg avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
 586                          const short *samples)
 587 {
 588     if(buf_size < FF_MIN_BUFFER_SIZE && 0){
 589         av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
 590         return -1;
 591     }
 592     if((avctx->codec->capabilities & CODEC_CAP_DELAY) || samples){
 593         int ret = avctx->codec->encode(avctx, buf, buf_size, samples);
 594         avctx->frame_number++;
 595         return ret;
 596     }else
 597         return 0;
 598 }
 599
 600 int attribute_align_arg avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
 601                          const AVFrame *pict)
 602 {
 603     if(buf_size < FF_MIN_BUFFER_SIZE){
 604         av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
 605         return -1;
 606     }
 607     if(av_image_check_size(avctx->width, avctx->height, 0, avctx))
 608         return -1;
 609     if((avctx->codec->capabilities & CODEC_CAP_DELAY) || pict){
 610         int ret = avctx->codec->encode(avctx, buf, buf_size, pict);
 611         avctx->frame_number++;
 612         emms_c(); //needed to avoid an emms_c() call before every return;
 613
 614         return ret;
 615     }else
 616         return 0;
 617 }
 618
 619 int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
 620                             const AVSubtitle *sub)
 621 {
 622     int ret;
 623     if(sub->start_display_time) {
 624         av_log(avctx, AV_LOG_ERROR, "start_display_time must be 0.\n");
 625         return -1;
 626     }
 627     if(sub->num_rects == 0 || !sub->rects)
 628         return -1;
 629     ret = avctx->codec->encode(avctx, buf, buf_size, sub);
 630     avctx->frame_number++;
 631     return ret;
 632 }
 633
 634 #if FF_API_VIDEO_OLD
 635 int attribute_align_arg avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
 636                          int *got_picture_ptr,
 637                          const uint8_t *buf, int buf_size)
 638 {
 639     AVPacket avpkt;
 640     av_init_packet(&avpkt);
 641     avpkt.data = buf;
 642     avpkt.size = buf_size;
 643     // HACK for CorePNG to decode as normal PNG by default
 644     avpkt.flags = AV_PKT_FLAG_KEY;
 645
 646     return avcodec_decode_video2(avctx, picture, got_picture_ptr, &avpkt);
 647 }
 648 #endif
 649
 650 int attribute_align_arg avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
 651                          int *got_picture_ptr,
 652                          AVPacket *avpkt)
 653 {
 654     int ret;
 655
 656     *got_picture_ptr= 0;
 657     if((avctx->coded_width||avctx->coded_height) && av_image_check_size(avctx->coded_width, avctx->coded_height, 0, avctx))
 658         return -1;
 659
 660     avctx->pkt = avpkt;
 661
 662     if((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size || (avctx->active_thread_type&FF_THREAD_FRAME)){
 663         if (HAVE_PTHREADS && avctx->active_thread_type&FF_THREAD_FRAME)
 664              ret = ff_thread_decode_frame(avctx, picture, got_picture_ptr,
 665                                           avpkt);
 666         else {
 667             ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
 668                               avpkt);
 669             picture->pkt_dts= avpkt->dts;
 670         }
 671
 672         emms_c(); //needed to avoid an emms_c() call before every return;
 673
 674         if (*got_picture_ptr)
 675             avctx->frame_number++;
 676     }else
 677         ret= 0;
 678
 679     return ret;
 680 }
 681
 682 #if FF_API_AUDIO_OLD
 683 int attribute_align_arg avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
 684                          int *frame_size_ptr,
 685                          const uint8_t *buf, int buf_size)
 686 {
 687     AVPacket avpkt;
 688     av_init_packet(&avpkt);
 689     avpkt.data = buf;
 690     avpkt.size = buf_size;
 691
 692     return avcodec_decode_audio3(avctx, samples, frame_size_ptr, &avpkt);
 693 }
 694 #endif
 695
 696 int attribute_align_arg avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples,
 697                          int *frame_size_ptr,
 698                          AVPacket *avpkt)
 699 {
 700     int ret;
 701
 702     avctx->pkt = avpkt;
 703
 704     if((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size){
 705         //FIXME remove the check below _after_ ensuring that all audio check that the available space is enough
 706         if(*frame_size_ptr < AVCODEC_MAX_AUDIO_FRAME_SIZE){
 707             av_log(avctx, AV_LOG_ERROR, "buffer smaller than AVCODEC_MAX_AUDIO_FRAME_SIZE\n");
 708             return -1;
 709         }
 710         if(*frame_size_ptr < FF_MIN_BUFFER_SIZE ||
 711         *frame_size_ptr < avctx->channels * avctx->frame_size * sizeof(int16_t)){
 712             av_log(avctx, AV_LOG_ERROR, "buffer %d too small\n", *frame_size_ptr);
 713             return -1;
 714         }
 715
 716         ret = avctx->codec->decode(avctx, samples, frame_size_ptr, avpkt);
 717         avctx->frame_number++;
 718     }else{
 719         ret= 0;
 720         *frame_size_ptr=0;
 721     }
 722     return ret;
 723 }
 724
 725 #if FF_API_SUBTITLE_OLD
 726 int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
 727                             int *got_sub_ptr,
 728                             const uint8_t *buf, int buf_size)
 729 {
 730     AVPacket avpkt;
 731     av_init_packet(&avpkt);
 732     avpkt.data = buf;
 733     avpkt.size = buf_size;
 734
 735     return avcodec_decode_subtitle2(avctx, sub, got_sub_ptr, &avpkt);
 736 }
 737 #endif
 738
 739 int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
 740                             int *got_sub_ptr,
 741                             AVPacket *avpkt)
 742 {
 743     int ret;
 744
 745     avctx->pkt = avpkt;
 746     *got_sub_ptr = 0;
 747     ret = avctx->codec->decode(avctx, sub, got_sub_ptr, avpkt);
 748     if (*got_sub_ptr)
 749         avctx->frame_number++;
 750     return ret;
 751 }
 752
 753 void avsubtitle_free(AVSubtitle *sub)
 754 {
 755     int i;
 756
 757     for (i = 0; i < sub->num_rects; i++)
 758     {
 759         av_freep(&sub->rects[i]->pict.data[0]);
 760         av_freep(&sub->rects[i]->pict.data[1]);
 761         av_freep(&sub->rects[i]->pict.data[2]);
 762         av_freep(&sub->rects[i]->pict.data[3]);
 763         av_freep(&sub->rects[i]->text);
 764         av_freep(&sub->rects[i]->ass);
 765         av_freep(&sub->rects[i]);
 766     }
 767
 768     av_freep(&sub->rects);
 769
 770     memset(sub, 0, sizeof(AVSubtitle));
 771 }
 772
 773 av_cold int avcodec_close(AVCodecContext *avctx)
 774 {
 775     /* If there is a user-supplied mutex locking routine, call it. */
 776     if (ff_lockmgr_cb) {
 777         if ((*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
 778             return -1;
 779     }
 780
 781     entangled_thread_counter++;
 782     if(entangled_thread_counter != 1){
 783         av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
 784         entangled_thread_counter--;
 785         return -1;
 786     }
 787
 788     if (HAVE_THREADS && avctx->thread_opaque)
 789         ff_thread_free(avctx);
 790     if (avctx->codec && avctx->codec->close)
 791         avctx->codec->close(avctx);
 792     avcodec_default_free_buffers(avctx);
 793     avctx->coded_frame = NULL;
 794     av_freep(&avctx->priv_data);
 795     if(avctx->codec && avctx->codec->encode)
 796         av_freep(&avctx->extradata);
 797     avctx->codec = NULL;
 798     avctx->active_thread_type = 0;
 799     entangled_thread_counter--;
 800
 801     /* Release any user-supplied mutex. */
 802     if (ff_lockmgr_cb) {
 803         (*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
 804     }
 805     return 0;
 806 }
 807
 808 AVCodec *avcodec_find_encoder(enum CodecID id)
 809 {
 810     AVCodec *p, *experimental=NULL;
 811     p = first_avcodec;
 812     while (p) {
 813         if (p->encode != NULL && p->id == id) {
 814             if (p->capabilities & CODEC_CAP_EXPERIMENTAL && !experimental) {
 815                 experimental = p;
 816             } else
 817                 return p;
 818         }
 819         p = p->next;
 820     }
 821     return experimental;
 822 }
 823
 824 AVCodec *avcodec_find_encoder_by_name(const char *name)
 825 {
 826     AVCodec *p;
 827     if (!name)
 828         return NULL;
 829     p = first_avcodec;
 830     while (p) {
 831         if (p->encode != NULL && strcmp(name,p->name) == 0)
 832             return p;
 833         p = p->next;
 834     }
 835     return NULL;
 836 }
 837
 838 AVCodec *avcodec_find_decoder(enum CodecID id)
 839 {
 840     AVCodec *p;
 841     p = first_avcodec;
 842     while (p) {
 843         if (p->decode != NULL && p->id == id)
 844             return p;
 845         p = p->next;
 846     }
 847     return NULL;
 848 }
 849
 850 AVCodec *avcodec_find_decoder_by_name(const char *name)
 851 {
 852     AVCodec *p;
 853     if (!name)
 854         return NULL;
 855     p = first_avcodec;
 856     while (p) {
 857         if (p->decode != NULL && strcmp(name,p->name) == 0)
 858             return p;
 859         p = p->next;
 860     }
 861     return NULL;
 862 }
 863
 864 static int get_bit_rate(AVCodecContext *ctx)
 865 {
 866     int bit_rate;
 867     int bits_per_sample;
 868
 869     switch(ctx->codec_type) {
 870     case AVMEDIA_TYPE_VIDEO:
 871     case AVMEDIA_TYPE_DATA:
 872     case AVMEDIA_TYPE_SUBTITLE:
 873     case AVMEDIA_TYPE_ATTACHMENT:
 874         bit_rate = ctx->bit_rate;
 875         break;
 876     case AVMEDIA_TYPE_AUDIO:
 877         bits_per_sample = av_get_bits_per_sample(ctx->codec_id);
 878         bit_rate = bits_per_sample ? ctx->sample_rate * ctx->channels * bits_per_sample : ctx->bit_rate;
 879         break;
 880     default:
 881         bit_rate = 0;
 882         break;
 883     }
 884     return bit_rate;
 885 }
 886
 887 size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag)
 888 {
 889     int i, len, ret = 0;
 890
 891     for (i = 0; i < 4; i++) {
 892         len = snprintf(buf, buf_size,
 893                        isprint(codec_tag&0xFF) ? "%c" : "[%d]", codec_tag&0xFF);
 894         buf      += len;
 895         buf_size  = buf_size > len ? buf_size - len : 0;
 896         ret      += len;
 897         codec_tag>>=8;
 898     }
 899     return ret;
 900 }
 901
 902 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
 903 {
 904     const char *codec_name;
 905     const char *profile = NULL;
 906     AVCodec *p;
 907     char buf1[32];
 908     int bitrate;
 909     AVRational display_aspect_ratio;
 910
 911     if (encode)
 912         p = avcodec_find_encoder(enc->codec_id);
 913     else
 914         p = avcodec_find_decoder(enc->codec_id);
 915
 916     if (p) {
 917         codec_name = p->name;
 918         profile = av_get_profile_name(p, enc->profile);
 919     } else if (enc->codec_id == CODEC_ID_MPEG2TS) {
 920         /* fake mpeg2 transport stream codec (currently not
 921            registered) */
 922         codec_name = "mpeg2ts";
 923     } else if (enc->codec_name[0] != '\0') {
 924         codec_name = enc->codec_name;
 925     } else {
 926         /* output avi tags */
 927         char tag_buf[32];
 928         av_get_codec_tag_string(tag_buf, sizeof(tag_buf), enc->codec_tag);
 929         snprintf(buf1, sizeof(buf1), "%s / 0x%04X", tag_buf, enc->codec_tag);
 930         codec_name = buf1;
 931     }
 932
 933     switch(enc->codec_type) {
 934     case AVMEDIA_TYPE_VIDEO:
 935         snprintf(buf, buf_size,
 936                  "Video: %s%s",
 937                  codec_name, enc->mb_decision ? " (hq)" : "");
 938         if (profile)
 939             snprintf(buf + strlen(buf), buf_size - strlen(buf),
 940                      " (%s)", profile);
 941         if (enc->pix_fmt != PIX_FMT_NONE) {
 942             snprintf(buf + strlen(buf), buf_size - strlen(buf),
 943                      ", %s",
 944                      avcodec_get_pix_fmt_name(enc->pix_fmt));
 945         }
 946         if (enc->width) {
 947             snprintf(buf + strlen(buf), buf_size - strlen(buf),
 948                      ", %dx%d",
 949                      enc->width, enc->height);
 950             if (enc->sample_aspect_ratio.num) {
 951                 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
 952                           enc->width*enc->sample_aspect_ratio.num,
 953                           enc->height*enc->sample_aspect_ratio.den,
 954                           1024*1024);
 955                 snprintf(buf + strlen(buf), buf_size - strlen(buf),
 956                          " [PAR %d:%d DAR %d:%d]",
 957                          enc->sample_aspect_ratio.num, enc->sample_aspect_ratio.den,
 958                          display_aspect_ratio.num, display_aspect_ratio.den);
 959             }
 960             if(av_log_get_level() >= AV_LOG_DEBUG){
 961                 int g= av_gcd(enc->time_base.num, enc->time_base.den);
 962                 snprintf(buf + strlen(buf), buf_size - strlen(buf),
 963                      ", %d/%d",
 964                      enc->time_base.num/g, enc->time_base.den/g);
 965             }
 966         }
 967         if (encode) {
 968             snprintf(buf + strlen(buf), buf_size - strlen(buf),
 969                      ", q=%d-%d", enc->qmin, enc->qmax);
 970         }
 971         break;
 972     case AVMEDIA_TYPE_AUDIO:
 973         snprintf(buf, buf_size,
 974                  "Audio: %s",
 975                  codec_name);
 976         if (profile)
 977             snprintf(buf + strlen(buf), buf_size - strlen(buf),
 978                      " (%s)", profile);
 979         if (enc->sample_rate) {
 980             snprintf(buf + strlen(buf), buf_size - strlen(buf),
 981                      ", %d Hz", enc->sample_rate);
 982         }
 983         av_strlcat(buf, ", ", buf_size);
 984         av_get_channel_layout_string(buf + strlen(buf), buf_size - strlen(buf), enc->channels, enc->channel_layout);
 985         if (enc->sample_fmt != AV_SAMPLE_FMT_NONE) {
 986             snprintf(buf + strlen(buf), buf_size - strlen(buf),
 987                      ", %s", av_get_sample_fmt_name(enc->sample_fmt));
 988         }
 989         break;
 990     case AVMEDIA_TYPE_DATA:
 991         snprintf(buf, buf_size, "Data: %s", codec_name);
 992         break;
 993     case AVMEDIA_TYPE_SUBTITLE:
 994         snprintf(buf, buf_size, "Subtitle: %s", codec_name);
 995         break;
 996     case AVMEDIA_TYPE_ATTACHMENT:
 997         snprintf(buf, buf_size, "Attachment: %s", codec_name);
 998         break;
 999     default:
1000         snprintf(buf, buf_size, "Invalid Codec type %d", enc->codec_type);
1001         return;
1002     }
1003     if (encode) {
1004         if (enc->flags & CODEC_FLAG_PASS1)
1005             snprintf(buf + strlen(buf), buf_size - strlen(buf),
1006                      ", pass 1");
1007         if (enc->flags & CODEC_FLAG_PASS2)
1008             snprintf(buf + strlen(buf), buf_size - strlen(buf),
1009                      ", pass 2");
1010     }
1011     bitrate = get_bit_rate(enc);
1012     if (bitrate != 0) {
1013         snprintf(buf + strlen(buf), buf_size - strlen(buf),
1014                  ", %d kb/s", bitrate / 1000);
1015     }
1016 }
1017
1018 const char *av_get_profile_name(const AVCodec *codec, int profile)
1019 {
1020     const AVProfile *p;
1021     if (profile == FF_PROFILE_UNKNOWN || !codec->profiles)
1022         return NULL;
1023
1024     for (p = codec->profiles; p->profile != FF_PROFILE_UNKNOWN; p++)
1025         if (p->profile == profile)
1026             return p->name;
1027
1028     return NULL;
1029 }
1030
1031 unsigned avcodec_version( void )
1032 {
1033   return LIBAVCODEC_VERSION_INT;
1034 }
1035
1036 const char *avcodec_configuration(void)
1037 {
1038     return LIBAV_CONFIGURATION;
1039 }
1040
1041 const char *avcodec_license(void)
1042 {
1043 #define LICENSE_PREFIX "libavcodec license: "
1044     return LICENSE_PREFIX LIBAV_LICENSE + sizeof(LICENSE_PREFIX) - 1;
1045 }
1046
1047 void avcodec_init(void)
1048 {
1049     static int initialized = 0;
1050
1051     if (initialized != 0)
1052         return;
1053     initialized = 1;
1054
1055     dsputil_static_init();
1056 }
1057
1058 void avcodec_flush_buffers(AVCodecContext *avctx)
1059 {
1060     if(HAVE_PTHREADS && avctx->active_thread_type&FF_THREAD_FRAME)
1061         ff_thread_flush(avctx);
1062     if(avctx->codec->flush)
1063         avctx->codec->flush(avctx);
1064 }
1065
1066 void avcodec_default_free_buffers(AVCodecContext *s){
1067     int i, j;
1068
1069     if(s->internal_buffer==NULL) return;
1070
1071     if (s->internal_buffer_count)
1072         av_log(s, AV_LOG_WARNING, "Found %i unreleased buffers!\n", s->internal_buffer_count);
1073     for(i=0; i<INTERNAL_BUFFER_SIZE; i++){
1074         InternalBuffer *buf= &((InternalBuffer*)s->internal_buffer)[i];
1075         for(j=0; j<4; j++){
1076             av_freep(&buf->base[j]);
1077             buf->data[j]= NULL;
1078         }
1079     }
1080     av_freep(&s->internal_buffer);
1081
1082     s->internal_buffer_count=0;
1083 }
1084
1085 char av_get_pict_type_char(int pict_type){
1086     switch(pict_type){
1087     case FF_I_TYPE: return 'I';
1088     case FF_P_TYPE: return 'P';
1089     case FF_B_TYPE: return 'B';
1090     case FF_S_TYPE: return 'S';
1091     case FF_SI_TYPE:return 'i';
1092     case FF_SP_TYPE:return 'p';
1093     case FF_BI_TYPE:return 'b';
1094     default:        return '?';
1095     }
1096 }
1097
1098 int av_get_bits_per_sample(enum CodecID codec_id){
1099     switch(codec_id){
1100     case CODEC_ID_ADPCM_SBPRO_2:
1101         return 2;
1102     case CODEC_ID_ADPCM_SBPRO_3:
1103         return 3;
1104     case CODEC_ID_ADPCM_SBPRO_4:
1105     case CODEC_ID_ADPCM_CT:
1106     case CODEC_ID_ADPCM_IMA_WAV:
1107     case CODEC_ID_ADPCM_MS:
1108     case CODEC_ID_ADPCM_YAMAHA:
1109         return 4;
1110     case CODEC_ID_PCM_ALAW:
1111     case CODEC_ID_PCM_MULAW:
1112     case CODEC_ID_PCM_S8:
1113     case CODEC_ID_PCM_U8:
1114     case CODEC_ID_PCM_ZORK:
1115         return 8;
1116     case CODEC_ID_PCM_S16BE:
1117     case CODEC_ID_PCM_S16LE:
1118     case CODEC_ID_PCM_S16LE_PLANAR:
1119     case CODEC_ID_PCM_U16BE:
1120     case CODEC_ID_PCM_U16LE:
1121         return 16;
1122     case CODEC_ID_PCM_S24DAUD:
1123     case CODEC_ID_PCM_S24BE:
1124     case CODEC_ID_PCM_S24LE:
1125     case CODEC_ID_PCM_U24BE:
1126     case CODEC_ID_PCM_U24LE:
1127         return 24;
1128     case CODEC_ID_PCM_S32BE:
1129     case CODEC_ID_PCM_S32LE:
1130     case CODEC_ID_PCM_U32BE:
1131     case CODEC_ID_PCM_U32LE:
1132     case CODEC_ID_PCM_F32BE:
1133     case CODEC_ID_PCM_F32LE:
1134         return 32;
1135     case CODEC_ID_PCM_F64BE:
1136     case CODEC_ID_PCM_F64LE:
1137         return 64;
1138     default:
1139         return 0;
1140     }
1141 }
1142
1143 #if FF_API_OLD_SAMPLE_FMT
1144 int av_get_bits_per_sample_format(enum AVSampleFormat sample_fmt) {
1145     return av_get_bits_per_sample_fmt(sample_fmt);
1146 }
1147 #endif
1148
1149 #if !HAVE_THREADS
1150 int ff_thread_init(AVCodecContext *s, int thread_count){
1151     s->thread_count = thread_count;
1152     return -1;
1153 }
1154 #endif
1155
1156 unsigned int av_xiphlacing(unsigned char *s, unsigned int v)
1157 {
1158     unsigned int n = 0;
1159
1160     while(v >= 0xff) {
1161         *s++ = 0xff;
1162         v -= 0xff;
1163         n++;
1164     }
1165     *s = v;
1166     n++;
1167     return n;
1168 }
1169
1170 #if LIBAVCODEC_VERSION_MAJOR < 53
1171 #include "libavutil/parseutils.h"
1172
1173 int av_parse_video_frame_size(int *width_ptr, int *height_ptr, const char *str)
1174 {
1175     return av_parse_video_size(width_ptr, height_ptr, str);
1176 }
1177
1178 int av_parse_video_frame_rate(AVRational *frame_rate, const char *arg)
1179 {
1180     return av_parse_video_rate(frame_rate, arg);
1181 }
1182 #endif
1183
1184 int ff_match_2uint16(const uint16_t (*tab)[2], int size, int a, int b){
1185     int i;
1186     for(i=0; i<size && !(tab[i][0]==a && tab[i][1]==b); i++);
1187     return i;
1188 }
1189
1190 void av_log_missing_feature(void *avc, const char *feature, int want_sample)
1191 {
1192     av_log(avc, AV_LOG_WARNING, "%s not implemented. Update your FFmpeg "
1193             "version to the newest one from Git. If the problem still "
1194             "occurs, it means that your file has a feature which has not "
1195             "been implemented.", feature);
1196     if(want_sample)
1197         av_log_ask_for_sample(avc, NULL);
1198     else
1199         av_log(avc, AV_LOG_WARNING, "\n");
1200 }
1201
1202 void av_log_ask_for_sample(void *avc, const char *msg)
1203 {
1204     if (msg)
1205         av_log(avc, AV_LOG_WARNING, "%s ", msg);
1206     av_log(avc, AV_LOG_WARNING, "If you want to help, upload a sample "
1207             "of this file to ftp://upload.libav.org/MPlayer/incoming/ "
1208             "and contact the libav-devel mailing list.\n");
1209 }
1210
1211 static AVHWAccel *first_hwaccel = NULL;
1212
1213 void av_register_hwaccel(AVHWAccel *hwaccel)
1214 {
1215     AVHWAccel **p = &first_hwaccel;
1216     while (*p)
1217         p = &(*p)->next;
1218     *p = hwaccel;
1219     hwaccel->next = NULL;
1220 }
1221
1222 AVHWAccel *av_hwaccel_next(AVHWAccel *hwaccel)
1223 {
1224     return hwaccel ? hwaccel->next : first_hwaccel;
1225 }
1226
1227 AVHWAccel *ff_find_hwaccel(enum CodecID codec_id, enum PixelFormat pix_fmt)
1228 {
1229     AVHWAccel *hwaccel=NULL;
1230
1231     while((hwaccel= av_hwaccel_next(hwaccel))){
1232         if (   hwaccel->id      == codec_id
1233             && hwaccel->pix_fmt == pix_fmt)
1234             return hwaccel;
1235     }
1236     return NULL;
1237 }
1238
1239 int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op))
1240 {
1241     if (ff_lockmgr_cb) {
1242         if (ff_lockmgr_cb(&codec_mutex, AV_LOCK_DESTROY))
1243             return -1;
1244     }
1245
1246     ff_lockmgr_cb = cb;
1247
1248     if (ff_lockmgr_cb) {
1249         if (ff_lockmgr_cb(&codec_mutex, AV_LOCK_CREATE))
1250             return -1;
1251     }
1252     return 0;
1253 }
1254
1255 unsigned int ff_toupper4(unsigned int x)
1256 {
1257     return     toupper( x     &0xFF)
1258             + (toupper((x>>8 )&0xFF)<<8 )
1259             + (toupper((x>>16)&0xFF)<<16)
1260             + (toupper((x>>24)&0xFF)<<24);
1261 }
1262
1263 #if !HAVE_PTHREADS
1264
1265 int ff_thread_get_buffer(AVCodecContext *avctx, AVFrame *f)
1266 {
1267     f->owner = avctx;
1268     return avctx->get_buffer(avctx, f);
1269 }
1270
1271 void ff_thread_release_buffer(AVCodecContext *avctx, AVFrame *f)
1272 {
1273     f->owner->release_buffer(f->owner, f);
1274 }
1275
1276 void ff_thread_finish_setup(AVCodecContext *avctx)
1277 {
1278 }
1279
1280 void ff_thread_report_progress(AVFrame *f, int progress, int field)
1281 {
1282 }
1283
1284 void ff_thread_await_progress(AVFrame *f, int progress, int field)
1285 {
1286 }
1287
1288 #endif
1289
1290 #if LIBAVCODEC_VERSION_MAJOR < 53
1291
1292 int avcodec_thread_init(AVCodecContext *s, int thread_count)
1293 {
1294     return ff_thread_init(s, thread_count);
1295 }
1296
1297 void avcodec_thread_free(AVCodecContext *s)
1298 {
1299 #if HAVE_THREADS
1300     ff_thread_free(s);
1301 #endif
1302 }
1303
1304 #endif