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 "libavcore/audioconvert.h"
  33 #include "libavcore/imgutils.h"
  34 #include "libavcore/internal.h"
  35 #include "libavcore/samplefmt.h"
  36 #include "avcodec.h"
  37 #include "dsputil.h"
  38 #include "libavutil/opt.h"
  39 #include "imgconvert.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         for(i=0; i<4; i++){
 265             av_freep(&buf->base[i]);
 266             buf->data[i]= NULL;
 267         }
 268     }
 269
 270     if(buf->base[0]){
 271         pic->age= *picture_number - buf->last_pic_num;
 272         buf->last_pic_num= *picture_number;
 273     }else{
 274         int h_chroma_shift, v_chroma_shift;
 275         int size[4] = {0};
 276         int tmpsize;
 277         int unaligned;
 278         AVPicture picture;
 279         int stride_align[4];
 280
 281         avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
 282
 283         avcodec_align_dimensions2(s, &w, &h, stride_align);
 284
 285         if(!(s->flags&CODEC_FLAG_EMU_EDGE)){
 286             w+= EDGE_WIDTH*2;
 287             h+= EDGE_WIDTH*2;
 288         }
 289
 290         do {
 291             // NOTE: do not align linesizes individually, this breaks e.g. assumptions
 292             // that linesize[0] == 2*linesize[1] in the MPEG-encoder for 4:2:2
 293             av_image_fill_linesizes(picture.linesize, s->pix_fmt, w);
 294             // increase alignment of w for next try (rhs gives the lowest bit set in w)
 295             w += w & ~(w-1);
 296
 297             unaligned = 0;
 298             for (i=0; i<4; i++){
 299                 unaligned |= picture.linesize[i] % stride_align[i];
 300             }
 301         } while (unaligned);
 302
 303         tmpsize = av_image_fill_pointers(picture.data, s->pix_fmt, h, NULL, picture.linesize);
 304         if (tmpsize < 0)
 305             return -1;
 306
 307         for (i=0; i<3 && picture.data[i+1]; i++)
 308             size[i] = picture.data[i+1] - picture.data[i];
 309         size[i] = tmpsize - (picture.data[i] - picture.data[0]);
 310
 311         buf->last_pic_num= -256*256*256*64;
 312         memset(buf->base, 0, sizeof(buf->base));
 313         memset(buf->data, 0, sizeof(buf->data));
 314
 315         for(i=0; i<4 && size[i]; i++){
 316             const int h_shift= i==0 ? 0 : h_chroma_shift;
 317             const int v_shift= i==0 ? 0 : v_chroma_shift;
 318
 319             buf->linesize[i]= picture.linesize[i];
 320
 321             buf->base[i]= av_malloc(size[i]+16); //FIXME 16
 322             if(buf->base[i]==NULL) return -1;
 323             memset(buf->base[i], 128, size[i]);
 324
 325             // no edge if EDGE EMU or not planar YUV
 326             if((s->flags&CODEC_FLAG_EMU_EDGE) || !size[2])
 327                 buf->data[i] = buf->base[i];
 328             else
 329                 buf->data[i] = buf->base[i] + FFALIGN((buf->linesize[i]*EDGE_WIDTH>>v_shift) + (EDGE_WIDTH>>h_shift), stride_align[i]);
 330         }
 331         if(size[1] && !size[2])
 332             ff_set_systematic_pal2((uint32_t*)buf->data[1], s->pix_fmt);
 333         buf->width  = s->width;
 334         buf->height = s->height;
 335         buf->pix_fmt= s->pix_fmt;
 336         pic->age= 256*256*256*64;
 337     }
 338     pic->type= FF_BUFFER_TYPE_INTERNAL;
 339
 340     for(i=0; i<4; i++){
 341         pic->base[i]= buf->base[i];
 342         pic->data[i]= buf->data[i];
 343         pic->linesize[i]= buf->linesize[i];
 344     }
 345     s->internal_buffer_count++;
 346
 347     if(s->pkt) pic->pkt_pts= s->pkt->pts;
 348     else       pic->pkt_pts= AV_NOPTS_VALUE;
 349     pic->reordered_opaque= s->reordered_opaque;
 350
 351     if(s->debug&FF_DEBUG_BUFFERS)
 352         av_log(s, AV_LOG_DEBUG, "default_get_buffer called on pic %p, %d buffers used\n", pic, s->internal_buffer_count);
 353
 354     return 0;
 355 }
 356
 357 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic){
 358     int i;
 359     InternalBuffer *buf, *last;
 360
 361     assert(pic->type==FF_BUFFER_TYPE_INTERNAL);
 362     assert(s->internal_buffer_count);
 363
 364     buf = NULL; /* avoids warning */
 365     for(i=0; i<s->internal_buffer_count; i++){ //just 3-5 checks so is not worth to optimize
 366         buf= &((InternalBuffer*)s->internal_buffer)[i];
 367         if(buf->data[0] == pic->data[0])
 368             break;
 369     }
 370     assert(i < s->internal_buffer_count);
 371     s->internal_buffer_count--;
 372     last = &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
 373
 374     FFSWAP(InternalBuffer, *buf, *last);
 375
 376     for(i=0; i<4; i++){
 377         pic->data[i]=NULL;
 378 //        pic->base[i]=NULL;
 379     }
 380 //printf("R%X\n", pic->opaque);
 381
 382     if(s->debug&FF_DEBUG_BUFFERS)
 383         av_log(s, AV_LOG_DEBUG, "default_release_buffer called on pic %p, %d buffers used\n", pic, s->internal_buffer_count);
 384 }
 385
 386 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic){
 387     AVFrame temp_pic;
 388     int i;
 389
 390     /* If no picture return a new buffer */
 391     if(pic->data[0] == NULL) {
 392         /* We will copy from buffer, so must be readable */
 393         pic->buffer_hints |= FF_BUFFER_HINTS_READABLE;
 394         return s->get_buffer(s, pic);
 395     }
 396
 397     /* If internal buffer type return the same buffer */
 398     if(pic->type == FF_BUFFER_TYPE_INTERNAL) {
 399         pic->reordered_opaque= s->reordered_opaque;
 400         return 0;
 401     }
 402
 403     /*
 404      * Not internal type and reget_buffer not overridden, emulate cr buffer
 405      */
 406     temp_pic = *pic;
 407     for(i = 0; i < 4; i++)
 408         pic->data[i] = pic->base[i] = NULL;
 409     pic->opaque = NULL;
 410     /* Allocate new frame */
 411     if (s->get_buffer(s, pic))
 412         return -1;
 413     /* Copy image data from old buffer to new buffer */
 414     av_picture_copy((AVPicture*)pic, (AVPicture*)&temp_pic, s->pix_fmt, s->width,
 415              s->height);
 416     s->release_buffer(s, &temp_pic); // Release old frame
 417     return 0;
 418 }
 419
 420 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size){
 421     int i;
 422
 423     for(i=0; i<count; i++){
 424         int r= func(c, (char*)arg + i*size);
 425         if(ret) ret[i]= r;
 426     }
 427     return 0;
 428 }
 429
 430 int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int jobnr, int threadnr),void *arg, int *ret, int count){
 431     int i;
 432
 433     for(i=0; i<count; i++){
 434         int r= func(c, arg, i, 0);
 435         if(ret) ret[i]= r;
 436     }
 437     return 0;
 438 }
 439
 440 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat *fmt){
 441     while (*fmt != PIX_FMT_NONE && ff_is_hwaccel_pix_fmt(*fmt))
 442         ++fmt;
 443     return fmt[0];
 444 }
 445
 446 void avcodec_get_frame_defaults(AVFrame *pic){
 447     memset(pic, 0, sizeof(AVFrame));
 448
 449     pic->pts= AV_NOPTS_VALUE;
 450     pic->key_frame= 1;
 451 }
 452
 453 AVFrame *avcodec_alloc_frame(void){
 454     AVFrame *pic= av_malloc(sizeof(AVFrame));
 455
 456     if(pic==NULL) return NULL;
 457
 458     avcodec_get_frame_defaults(pic);
 459
 460     return pic;
 461 }
 462
 463 int attribute_align_arg avcodec_open(AVCodecContext *avctx, AVCodec *codec)
 464 {
 465     int ret= -1;
 466
 467     /* If there is a user-supplied mutex locking routine, call it. */
 468     if (ff_lockmgr_cb) {
 469         if ((*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
 470             return -1;
 471     }
 472
 473     entangled_thread_counter++;
 474     if(entangled_thread_counter != 1){
 475         av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
 476         goto end;
 477     }
 478
 479     if(avctx->codec || !codec)
 480         goto end;
 481
 482     if (codec->priv_data_size > 0) {
 483       if(!avctx->priv_data){
 484         avctx->priv_data = av_mallocz(codec->priv_data_size);
 485         if (!avctx->priv_data) {
 486             ret = AVERROR(ENOMEM);
 487             goto end;
 488         }
 489         if(codec->priv_class){ //this can be droped once all user apps use   avcodec_get_context_defaults3()
 490             *(AVClass**)avctx->priv_data= codec->priv_class;
 491             av_opt_set_defaults(avctx->priv_data);
 492         }
 493       }
 494     } else {
 495         avctx->priv_data = NULL;
 496     }
 497
 498     if(avctx->coded_width && avctx->coded_height)
 499         avcodec_set_dimensions(avctx, avctx->coded_width, avctx->coded_height);
 500     else if(avctx->width && avctx->height)
 501         avcodec_set_dimensions(avctx, avctx->width, avctx->height);
 502
 503     if ((avctx->coded_width || avctx->coded_height || avctx->width || avctx->height)
 504         && (  av_image_check_size(avctx->coded_width, avctx->coded_height, 0, avctx) < 0
 505            || av_image_check_size(avctx->width,       avctx->height,       0, avctx) < 0)) {
 506         av_log(avctx, AV_LOG_WARNING, "ignoring invalid width/height values\n");
 507         avcodec_set_dimensions(avctx, 0, 0);
 508     }
 509
 510     /* if the decoder init function was already called previously,
 511        free the already allocated subtitle_header before overwriting it */
 512     if (codec->decode)
 513         av_freep(&avctx->subtitle_header);
 514
 515 #define SANE_NB_CHANNELS 128U
 516     if (avctx->channels > SANE_NB_CHANNELS) {
 517         ret = AVERROR(EINVAL);
 518         goto free_and_end;
 519     }
 520
 521     avctx->codec = codec;
 522     if ((avctx->codec_type == AVMEDIA_TYPE_UNKNOWN || avctx->codec_type == codec->type) &&
 523         avctx->codec_id == CODEC_ID_NONE) {
 524         avctx->codec_type = codec->type;
 525         avctx->codec_id   = codec->id;
 526     }
 527     if (avctx->codec_id != codec->id || (avctx->codec_type != codec->type
 528                            && avctx->codec_type != AVMEDIA_TYPE_ATTACHMENT)) {
 529         av_log(avctx, AV_LOG_ERROR, "codec type or id mismatches\n");
 530         goto free_and_end;
 531     }
 532     avctx->frame_number = 0;
 533     if (avctx->codec->max_lowres < avctx->lowres) {
 534         av_log(avctx, AV_LOG_ERROR, "The maximum value for lowres supported by the decoder is %d\n",
 535                avctx->codec->max_lowres);
 536         goto free_and_end;
 537     }
 538
 539     if(avctx->codec->init){
 540         ret = avctx->codec->init(avctx);
 541         if (ret < 0) {
 542             goto free_and_end;
 543         }
 544     }
 545     ret=0;
 546 end:
 547     entangled_thread_counter--;
 548
 549     /* Release any user-supplied mutex. */
 550     if (ff_lockmgr_cb) {
 551         (*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
 552     }
 553     return ret;
 554 free_and_end:
 555     av_freep(&avctx->priv_data);
 556     avctx->codec= NULL;
 557     goto end;
 558 }
 559
 560 int attribute_align_arg avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
 561                          const short *samples)
 562 {
 563     if(buf_size < FF_MIN_BUFFER_SIZE && 0){
 564         av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
 565         return -1;
 566     }
 567     if((avctx->codec->capabilities & CODEC_CAP_DELAY) || samples){
 568         int ret = avctx->codec->encode(avctx, buf, buf_size, samples);
 569         avctx->frame_number++;
 570         return ret;
 571     }else
 572         return 0;
 573 }
 574
 575 int attribute_align_arg avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
 576                          const AVFrame *pict)
 577 {
 578     if(buf_size < FF_MIN_BUFFER_SIZE){
 579         av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
 580         return -1;
 581     }
 582     if(av_image_check_size(avctx->width, avctx->height, 0, avctx))
 583         return -1;
 584     if((avctx->codec->capabilities & CODEC_CAP_DELAY) || pict){
 585         int ret = avctx->codec->encode(avctx, buf, buf_size, pict);
 586         avctx->frame_number++;
 587         emms_c(); //needed to avoid an emms_c() call before every return;
 588
 589         return ret;
 590     }else
 591         return 0;
 592 }
 593
 594 int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
 595                             const AVSubtitle *sub)
 596 {
 597     int ret;
 598     if(sub->start_display_time) {
 599         av_log(avctx, AV_LOG_ERROR, "start_display_time must be 0.\n");
 600         return -1;
 601     }
 602     if(sub->num_rects == 0 || !sub->rects)
 603         return -1;
 604     ret = avctx->codec->encode(avctx, buf, buf_size, sub);
 605     avctx->frame_number++;
 606     return ret;
 607 }
 608
 609 #if FF_API_VIDEO_OLD
 610 int attribute_align_arg avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
 611                          int *got_picture_ptr,
 612                          const uint8_t *buf, int buf_size)
 613 {
 614     AVPacket avpkt;
 615     av_init_packet(&avpkt);
 616     avpkt.data = buf;
 617     avpkt.size = buf_size;
 618     // HACK for CorePNG to decode as normal PNG by default
 619     avpkt.flags = AV_PKT_FLAG_KEY;
 620
 621     return avcodec_decode_video2(avctx, picture, got_picture_ptr, &avpkt);
 622 }
 623 #endif
 624
 625 int attribute_align_arg avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
 626                          int *got_picture_ptr,
 627                          AVPacket *avpkt)
 628 {
 629     int ret;
 630
 631     *got_picture_ptr= 0;
 632     if((avctx->coded_width||avctx->coded_height) && av_image_check_size(avctx->coded_width, avctx->coded_height, 0, avctx))
 633         return -1;
 634
 635     avctx->pkt = avpkt;
 636
 637     if((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size){
 638         ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
 639                                 avpkt);
 640
 641         emms_c(); //needed to avoid an emms_c() call before every return;
 642
 643         picture->pkt_dts= avpkt->dts;
 644
 645         if (*got_picture_ptr)
 646             avctx->frame_number++;
 647     }else
 648         ret= 0;
 649
 650     return ret;
 651 }
 652
 653 #if FF_API_AUDIO_OLD
 654 int attribute_align_arg avcodec_decode_audio2(AVCodecContext *avctx, int16_t *samples,
 655                          int *frame_size_ptr,
 656                          const uint8_t *buf, int buf_size)
 657 {
 658     AVPacket avpkt;
 659     av_init_packet(&avpkt);
 660     avpkt.data = buf;
 661     avpkt.size = buf_size;
 662
 663     return avcodec_decode_audio3(avctx, samples, frame_size_ptr, &avpkt);
 664 }
 665 #endif
 666
 667 int attribute_align_arg avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples,
 668                          int *frame_size_ptr,
 669                          AVPacket *avpkt)
 670 {
 671     int ret;
 672
 673     avctx->pkt = avpkt;
 674
 675     if((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size){
 676         //FIXME remove the check below _after_ ensuring that all audio check that the available space is enough
 677         if(*frame_size_ptr < AVCODEC_MAX_AUDIO_FRAME_SIZE){
 678             av_log(avctx, AV_LOG_ERROR, "buffer smaller than AVCODEC_MAX_AUDIO_FRAME_SIZE\n");
 679             return -1;
 680         }
 681         if(*frame_size_ptr < FF_MIN_BUFFER_SIZE ||
 682         *frame_size_ptr < avctx->channels * avctx->frame_size * sizeof(int16_t)){
 683             av_log(avctx, AV_LOG_ERROR, "buffer %d too small\n", *frame_size_ptr);
 684             return -1;
 685         }
 686
 687         ret = avctx->codec->decode(avctx, samples, frame_size_ptr, avpkt);
 688         avctx->frame_number++;
 689     }else{
 690         ret= 0;
 691         *frame_size_ptr=0;
 692     }
 693     return ret;
 694 }
 695
 696 #if FF_API_SUBTITLE_OLD
 697 int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtitle *sub,
 698                             int *got_sub_ptr,
 699                             const uint8_t *buf, int buf_size)
 700 {
 701     AVPacket avpkt;
 702     av_init_packet(&avpkt);
 703     avpkt.data = buf;
 704     avpkt.size = buf_size;
 705
 706     return avcodec_decode_subtitle2(avctx, sub, got_sub_ptr, &avpkt);
 707 }
 708 #endif
 709
 710 int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
 711                             int *got_sub_ptr,
 712                             AVPacket *avpkt)
 713 {
 714     int ret;
 715
 716     avctx->pkt = avpkt;
 717     *got_sub_ptr = 0;
 718     ret = avctx->codec->decode(avctx, sub, got_sub_ptr, avpkt);
 719     if (*got_sub_ptr)
 720         avctx->frame_number++;
 721     return ret;
 722 }
 723
 724 void avsubtitle_free(AVSubtitle *sub)
 725 {
 726     int i;
 727
 728     for (i = 0; i < sub->num_rects; i++)
 729     {
 730         av_freep(&sub->rects[i]->pict.data[0]);
 731         av_freep(&sub->rects[i]->pict.data[1]);
 732         av_freep(&sub->rects[i]->pict.data[2]);
 733         av_freep(&sub->rects[i]->pict.data[3]);
 734         av_freep(&sub->rects[i]->text);
 735         av_freep(&sub->rects[i]->ass);
 736         av_freep(&sub->rects[i]);
 737     }
 738
 739     av_freep(&sub->rects);
 740
 741     memset(sub, 0, sizeof(AVSubtitle));
 742 }
 743
 744 av_cold int avcodec_close(AVCodecContext *avctx)
 745 {
 746     /* If there is a user-supplied mutex locking routine, call it. */
 747     if (ff_lockmgr_cb) {
 748         if ((*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
 749             return -1;
 750     }
 751
 752     entangled_thread_counter++;
 753     if(entangled_thread_counter != 1){
 754         av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
 755         entangled_thread_counter--;
 756         return -1;
 757     }
 758
 759     if (HAVE_THREADS && avctx->thread_opaque)
 760         avcodec_thread_free(avctx);
 761     if (avctx->codec && avctx->codec->close)
 762         avctx->codec->close(avctx);
 763     avcodec_default_free_buffers(avctx);
 764     avctx->coded_frame = NULL;
 765     av_freep(&avctx->priv_data);
 766     if(avctx->codec && avctx->codec->encode)
 767         av_freep(&avctx->extradata);
 768     avctx->codec = NULL;
 769     entangled_thread_counter--;
 770
 771     /* Release any user-supplied mutex. */
 772     if (ff_lockmgr_cb) {
 773         (*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
 774     }
 775     return 0;
 776 }
 777
 778 AVCodec *avcodec_find_encoder(enum CodecID id)
 779 {
 780     AVCodec *p, *experimental=NULL;
 781     p = first_avcodec;
 782     while (p) {
 783         if (p->encode != NULL && p->id == id) {
 784             if (p->capabilities & CODEC_CAP_EXPERIMENTAL && !experimental) {
 785                 experimental = p;
 786             } else
 787                 return p;
 788         }
 789         p = p->next;
 790     }
 791     return experimental;
 792 }
 793
 794 AVCodec *avcodec_find_encoder_by_name(const char *name)
 795 {
 796     AVCodec *p;
 797     if (!name)
 798         return NULL;
 799     p = first_avcodec;
 800     while (p) {
 801         if (p->encode != NULL && strcmp(name,p->name) == 0)
 802             return p;
 803         p = p->next;
 804     }
 805     return NULL;
 806 }
 807
 808 AVCodec *avcodec_find_decoder(enum CodecID id)
 809 {
 810     AVCodec *p;
 811     p = first_avcodec;
 812     while (p) {
 813         if (p->decode != NULL && p->id == id)
 814             return p;
 815         p = p->next;
 816     }
 817     return NULL;
 818 }
 819
 820 AVCodec *avcodec_find_decoder_by_name(const char *name)
 821 {
 822     AVCodec *p;
 823     if (!name)
 824         return NULL;
 825     p = first_avcodec;
 826     while (p) {
 827         if (p->decode != NULL && strcmp(name,p->name) == 0)
 828             return p;
 829         p = p->next;
 830     }
 831     return NULL;
 832 }
 833
 834 static int get_bit_rate(AVCodecContext *ctx)
 835 {
 836     int bit_rate;
 837     int bits_per_sample;
 838
 839     switch(ctx->codec_type) {
 840     case AVMEDIA_TYPE_VIDEO:
 841     case AVMEDIA_TYPE_DATA:
 842     case AVMEDIA_TYPE_SUBTITLE:
 843     case AVMEDIA_TYPE_ATTACHMENT:
 844         bit_rate = ctx->bit_rate;
 845         break;
 846     case AVMEDIA_TYPE_AUDIO:
 847         bits_per_sample = av_get_bits_per_sample(ctx->codec_id);
 848         bit_rate = bits_per_sample ? ctx->sample_rate * ctx->channels * bits_per_sample : ctx->bit_rate;
 849         break;
 850     default:
 851         bit_rate = 0;
 852         break;
 853     }
 854     return bit_rate;
 855 }
 856
 857 size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag)
 858 {
 859     int i, len, ret = 0;
 860
 861     for (i = 0; i < 4; i++) {
 862         len = snprintf(buf, buf_size,
 863                        isprint(codec_tag&0xFF) ? "%c" : "[%d]", codec_tag&0xFF);
 864         buf      += len;
 865         buf_size  = buf_size > len ? buf_size - len : 0;
 866         ret      += len;
 867         codec_tag>>=8;
 868     }
 869     return ret;
 870 }
 871
 872 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
 873 {
 874     const char *codec_name;
 875     const char *profile = NULL;
 876     AVCodec *p;
 877     char buf1[32];
 878     int bitrate;
 879     AVRational display_aspect_ratio;
 880
 881     if (encode)
 882         p = avcodec_find_encoder(enc->codec_id);
 883     else
 884         p = avcodec_find_decoder(enc->codec_id);
 885
 886     if (p) {
 887         codec_name = p->name;
 888         profile = av_get_profile_name(p, enc->profile);
 889     } else if (enc->codec_id == CODEC_ID_MPEG2TS) {
 890         /* fake mpeg2 transport stream codec (currently not
 891            registered) */
 892         codec_name = "mpeg2ts";
 893     } else if (enc->codec_name[0] != '\0') {
 894         codec_name = enc->codec_name;
 895     } else {
 896         /* output avi tags */
 897         char tag_buf[32];
 898         av_get_codec_tag_string(tag_buf, sizeof(tag_buf), enc->codec_tag);
 899         snprintf(buf1, sizeof(buf1), "%s / 0x%04X", tag_buf, enc->codec_tag);
 900         codec_name = buf1;
 901     }
 902
 903     switch(enc->codec_type) {
 904     case AVMEDIA_TYPE_VIDEO:
 905         snprintf(buf, buf_size,
 906                  "Video: %s%s",
 907                  codec_name, enc->mb_decision ? " (hq)" : "");
 908         if (profile)
 909             snprintf(buf + strlen(buf), buf_size - strlen(buf),
 910                      " (%s)", profile);
 911         if (enc->pix_fmt != PIX_FMT_NONE) {
 912             snprintf(buf + strlen(buf), buf_size - strlen(buf),
 913                      ", %s",
 914                      avcodec_get_pix_fmt_name(enc->pix_fmt));
 915         }
 916         if (enc->width) {
 917             snprintf(buf + strlen(buf), buf_size - strlen(buf),
 918                      ", %dx%d",
 919                      enc->width, enc->height);
 920             if (enc->sample_aspect_ratio.num) {
 921                 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
 922                           enc->width*enc->sample_aspect_ratio.num,
 923                           enc->height*enc->sample_aspect_ratio.den,
 924                           1024*1024);
 925                 snprintf(buf + strlen(buf), buf_size - strlen(buf),
 926                          " [PAR %d:%d DAR %d:%d]",
 927                          enc->sample_aspect_ratio.num, enc->sample_aspect_ratio.den,
 928                          display_aspect_ratio.num, display_aspect_ratio.den);
 929             }
 930             if(av_log_get_level() >= AV_LOG_DEBUG){
 931                 int g= av_gcd(enc->time_base.num, enc->time_base.den);
 932                 snprintf(buf + strlen(buf), buf_size - strlen(buf),
 933                      ", %d/%d",
 934                      enc->time_base.num/g, enc->time_base.den/g);
 935             }
 936         }
 937         if (encode) {
 938             snprintf(buf + strlen(buf), buf_size - strlen(buf),
 939                      ", q=%d-%d", enc->qmin, enc->qmax);
 940         }
 941         break;
 942     case AVMEDIA_TYPE_AUDIO:
 943         snprintf(buf, buf_size,
 944                  "Audio: %s",
 945                  codec_name);
 946         if (profile)
 947             snprintf(buf + strlen(buf), buf_size - strlen(buf),
 948                      " (%s)", profile);
 949         if (enc->sample_rate) {
 950             snprintf(buf + strlen(buf), buf_size - strlen(buf),
 951                      ", %d Hz", enc->sample_rate);
 952         }
 953         av_strlcat(buf, ", ", buf_size);
 954         av_get_channel_layout_string(buf + strlen(buf), buf_size - strlen(buf), enc->channels, enc->channel_layout);
 955         if (enc->sample_fmt != AV_SAMPLE_FMT_NONE) {
 956             snprintf(buf + strlen(buf), buf_size - strlen(buf),
 957                      ", %s", av_get_sample_fmt_name(enc->sample_fmt));
 958         }
 959         break;
 960     case AVMEDIA_TYPE_DATA:
 961         snprintf(buf, buf_size, "Data: %s", codec_name);
 962         break;
 963     case AVMEDIA_TYPE_SUBTITLE:
 964         snprintf(buf, buf_size, "Subtitle: %s", codec_name);
 965         break;
 966     case AVMEDIA_TYPE_ATTACHMENT:
 967         snprintf(buf, buf_size, "Attachment: %s", codec_name);
 968         break;
 969     default:
 970         snprintf(buf, buf_size, "Invalid Codec type %d", enc->codec_type);
 971         return;
 972     }
 973     if (encode) {
 974         if (enc->flags & CODEC_FLAG_PASS1)
 975             snprintf(buf + strlen(buf), buf_size - strlen(buf),
 976                      ", pass 1");
 977         if (enc->flags & CODEC_FLAG_PASS2)
 978             snprintf(buf + strlen(buf), buf_size - strlen(buf),
 979                      ", pass 2");
 980     }
 981     bitrate = get_bit_rate(enc);
 982     if (bitrate != 0) {
 983         snprintf(buf + strlen(buf), buf_size - strlen(buf),
 984                  ", %d kb/s", bitrate / 1000);
 985     }
 986 }
 987
 988 const char *av_get_profile_name(const AVCodec *codec, int profile)
 989 {
 990     const AVProfile *p;
 991     if (profile == FF_PROFILE_UNKNOWN || !codec->profiles)
 992         return NULL;
 993
 994     for (p = codec->profiles; p->profile != FF_PROFILE_UNKNOWN; p++)
 995         if (p->profile == profile)
 996             return p->name;
 997
 998     return NULL;
 999 }
1000
1001 unsigned avcodec_version( void )
1002 {
1003   return LIBAVCODEC_VERSION_INT;
1004 }
1005
1006 const char *avcodec_configuration(void)
1007 {
1008     return FFMPEG_CONFIGURATION;
1009 }
1010
1011 const char *avcodec_license(void)
1012 {
1013 #define LICENSE_PREFIX "libavcodec license: "
1014     return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
1015 }
1016
1017 void avcodec_init(void)
1018 {
1019     static int initialized = 0;
1020
1021     if (initialized != 0)
1022         return;
1023     initialized = 1;
1024
1025     dsputil_static_init();
1026 }
1027
1028 void avcodec_flush_buffers(AVCodecContext *avctx)
1029 {
1030     if(avctx->codec->flush)
1031         avctx->codec->flush(avctx);
1032 }
1033
1034 void avcodec_default_free_buffers(AVCodecContext *s){
1035     int i, j;
1036
1037     if(s->internal_buffer==NULL) return;
1038
1039     if (s->internal_buffer_count)
1040         av_log(s, AV_LOG_WARNING, "Found %i unreleased buffers!\n", s->internal_buffer_count);
1041     for(i=0; i<INTERNAL_BUFFER_SIZE; i++){
1042         InternalBuffer *buf= &((InternalBuffer*)s->internal_buffer)[i];
1043         for(j=0; j<4; j++){
1044             av_freep(&buf->base[j]);
1045             buf->data[j]= NULL;
1046         }
1047     }
1048     av_freep(&s->internal_buffer);
1049
1050     s->internal_buffer_count=0;
1051 }
1052
1053 char av_get_pict_type_char(int pict_type){
1054     switch(pict_type){
1055     case FF_I_TYPE: return 'I';
1056     case FF_P_TYPE: return 'P';
1057     case FF_B_TYPE: return 'B';
1058     case FF_S_TYPE: return 'S';
1059     case FF_SI_TYPE:return 'i';
1060     case FF_SP_TYPE:return 'p';
1061     case FF_BI_TYPE:return 'b';
1062     default:        return '?';
1063     }
1064 }
1065
1066 int av_get_bits_per_sample(enum CodecID codec_id){
1067     switch(codec_id){
1068     case CODEC_ID_ADPCM_SBPRO_2:
1069         return 2;
1070     case CODEC_ID_ADPCM_SBPRO_3:
1071         return 3;
1072     case CODEC_ID_ADPCM_SBPRO_4:
1073     case CODEC_ID_ADPCM_CT:
1074     case CODEC_ID_ADPCM_IMA_WAV:
1075     case CODEC_ID_ADPCM_MS:
1076     case CODEC_ID_ADPCM_YAMAHA:
1077         return 4;
1078     case CODEC_ID_PCM_ALAW:
1079     case CODEC_ID_PCM_MULAW:
1080     case CODEC_ID_PCM_S8:
1081     case CODEC_ID_PCM_U8:
1082     case CODEC_ID_PCM_ZORK:
1083         return 8;
1084     case CODEC_ID_PCM_S16BE:
1085     case CODEC_ID_PCM_S16LE:
1086     case CODEC_ID_PCM_S16LE_PLANAR:
1087     case CODEC_ID_PCM_U16BE:
1088     case CODEC_ID_PCM_U16LE:
1089         return 16;
1090     case CODEC_ID_PCM_S24DAUD:
1091     case CODEC_ID_PCM_S24BE:
1092     case CODEC_ID_PCM_S24LE:
1093     case CODEC_ID_PCM_U24BE:
1094     case CODEC_ID_PCM_U24LE:
1095         return 24;
1096     case CODEC_ID_PCM_S32BE:
1097     case CODEC_ID_PCM_S32LE:
1098     case CODEC_ID_PCM_U32BE:
1099     case CODEC_ID_PCM_U32LE:
1100     case CODEC_ID_PCM_F32BE:
1101     case CODEC_ID_PCM_F32LE:
1102         return 32;
1103     case CODEC_ID_PCM_F64BE:
1104     case CODEC_ID_PCM_F64LE:
1105         return 64;
1106     default:
1107         return 0;
1108     }
1109 }
1110
1111 #if FF_API_OLD_SAMPLE_FMT
1112 int av_get_bits_per_sample_format(enum AVSampleFormat sample_fmt) {
1113     return av_get_bits_per_sample_fmt(sample_fmt);
1114 }
1115 #endif
1116
1117 #if !HAVE_THREADS
1118 int avcodec_thread_init(AVCodecContext *s, int thread_count){
1119     s->thread_count = thread_count;
1120     return -1;
1121 }
1122 #endif
1123
1124 unsigned int av_xiphlacing(unsigned char *s, unsigned int v)
1125 {
1126     unsigned int n = 0;
1127
1128     while(v >= 0xff) {
1129         *s++ = 0xff;
1130         v -= 0xff;
1131         n++;
1132     }
1133     *s = v;
1134     n++;
1135     return n;
1136 }
1137
1138 #if LIBAVCODEC_VERSION_MAJOR < 53
1139 #include "libavcore/parseutils.h"
1140
1141 int av_parse_video_frame_size(int *width_ptr, int *height_ptr, const char *str)
1142 {
1143     return av_parse_video_size(width_ptr, height_ptr, str);
1144 }
1145
1146 int av_parse_video_frame_rate(AVRational *frame_rate, const char *arg)
1147 {
1148     return av_parse_video_rate(frame_rate, arg);
1149 }
1150 #endif
1151
1152 int ff_match_2uint16(const uint16_t (*tab)[2], int size, int a, int b){
1153     int i;
1154     for(i=0; i<size && !(tab[i][0]==a && tab[i][1]==b); i++);
1155     return i;
1156 }
1157
1158 void av_log_missing_feature(void *avc, const char *feature, int want_sample)
1159 {
1160     av_log(avc, AV_LOG_WARNING, "%s not implemented. Update your FFmpeg "
1161             "version to the newest one from Git. If the problem still "
1162             "occurs, it means that your file has a feature which has not "
1163             "been implemented.", feature);
1164     if(want_sample)
1165         av_log_ask_for_sample(avc, NULL);
1166     else
1167         av_log(avc, AV_LOG_WARNING, "\n");
1168 }
1169
1170 void av_log_ask_for_sample(void *avc, const char *msg)
1171 {
1172     if (msg)
1173         av_log(avc, AV_LOG_WARNING, "%s ", msg);
1174     av_log(avc, AV_LOG_WARNING, "If you want to help, upload a sample "
1175             "of this file to ftp://upload.ffmpeg.org/MPlayer/incoming/ "
1176             "and contact the ffmpeg-devel mailing list.\n");
1177 }
1178
1179 static AVHWAccel *first_hwaccel = NULL;
1180
1181 void av_register_hwaccel(AVHWAccel *hwaccel)
1182 {
1183     AVHWAccel **p = &first_hwaccel;
1184     while (*p)
1185         p = &(*p)->next;
1186     *p = hwaccel;
1187     hwaccel->next = NULL;
1188 }
1189
1190 AVHWAccel *av_hwaccel_next(AVHWAccel *hwaccel)
1191 {
1192     return hwaccel ? hwaccel->next : first_hwaccel;
1193 }
1194
1195 AVHWAccel *ff_find_hwaccel(enum CodecID codec_id, enum PixelFormat pix_fmt)
1196 {
1197     AVHWAccel *hwaccel=NULL;
1198
1199     while((hwaccel= av_hwaccel_next(hwaccel))){
1200         if (   hwaccel->id      == codec_id
1201             && hwaccel->pix_fmt == pix_fmt)
1202             return hwaccel;
1203     }
1204     return NULL;
1205 }
1206
1207 int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op))
1208 {
1209     if (ff_lockmgr_cb) {
1210         if (ff_lockmgr_cb(&codec_mutex, AV_LOCK_DESTROY))
1211             return -1;
1212     }
1213
1214     ff_lockmgr_cb = cb;
1215
1216     if (ff_lockmgr_cb) {
1217         if (ff_lockmgr_cb(&codec_mutex, AV_LOCK_CREATE))
1218             return -1;
1219     }
1220     return 0;
1221 }
1222
1223 unsigned int ff_toupper4(unsigned int x)
1224 {
1225     return     toupper( x     &0xFF)
1226             + (toupper((x>>8 )&0xFF)<<8 )
1227             + (toupper((x>>16)&0xFF)<<16)
1228             + (toupper((x>>24)&0xFF)<<24);
1229 }