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 Libav.
   7  *
   8  * Libav 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  * Libav 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 Libav; 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/crc.h"
  30 #include "libavutil/mathematics.h"
  31 #include "libavutil/pixdesc.h"
  32 #include "libavutil/audioconvert.h"
  33 #include "libavutil/imgutils.h"
  34 #include "libavutil/samplefmt.h"
  35 #include "libavutil/dict.h"
  36 #include "avcodec.h"
  37 #include "dsputil.h"
  38 #include "libavutil/opt.h"
  39 #include "imgconvert.h"
  40 #include "thread.h"
  41 #include "audioconvert.h"
  42 #include "internal.h"
  43 #include <stdlib.h>
  44 #include <stdarg.h>
  45 #include <limits.h>
  46 #include <float.h>
  47
  48 static int volatile entangled_thread_counter=0;
  49 static int (*ff_lockmgr_cb)(void **mutex, enum AVLockOp op);
  50 static void *codec_mutex;
  51 static void *avformat_mutex;
  52
  53 void *av_fast_realloc(void *ptr, unsigned int *size, size_t min_size)
  54 {
  55     if(min_size < *size)
  56         return ptr;
  57
  58     min_size= FFMAX(17*min_size/16 + 32, min_size);
  59
  60     ptr= av_realloc(ptr, min_size);
  61     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
  62         min_size= 0;
  63
  64     *size= min_size;
  65
  66     return ptr;
  67 }
  68
  69 void av_fast_malloc(void *ptr, unsigned int *size, size_t min_size)
  70 {
  71     void **p = ptr;
  72     if (min_size < *size)
  73         return;
  74     min_size= FFMAX(17*min_size/16 + 32, min_size);
  75     av_free(*p);
  76     *p = av_malloc(min_size);
  77     if (!*p) min_size = 0;
  78     *size= min_size;
  79 }
  80
  81 /* encoder management */
  82 static AVCodec *first_avcodec = NULL;
  83
  84 AVCodec *av_codec_next(AVCodec *c){
  85     if(c) return c->next;
  86     else  return first_avcodec;
  87 }
  88
  89 #if !FF_API_AVCODEC_INIT
  90 static
  91 #endif
  92 void avcodec_init(void)
  93 {
  94     static int initialized = 0;
  95
  96     if (initialized != 0)
  97         return;
  98     initialized = 1;
  99
 100     dsputil_static_init();
 101 }
 102
 103 void avcodec_register(AVCodec *codec)
 104 {
 105     AVCodec **p;
 106     avcodec_init();
 107     p = &first_avcodec;
 108     while (*p != NULL) p = &(*p)->next;
 109     *p = codec;
 110     codec->next = NULL;
 111
 112     if (codec->init_static_data)
 113         codec->init_static_data(codec);
 114 }
 115
 116 unsigned avcodec_get_edge_width(void)
 117 {
 118     return EDGE_WIDTH;
 119 }
 120
 121 void avcodec_set_dimensions(AVCodecContext *s, int width, int height){
 122     s->coded_width = width;
 123     s->coded_height= height;
 124     s->width = -((-width )>>s->lowres);
 125     s->height= -((-height)>>s->lowres);
 126 }
 127
 128 #define INTERNAL_BUFFER_SIZE (32+1)
 129
 130 void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
 131                                int linesize_align[AV_NUM_DATA_POINTERS])
 132 {
 133     int i;
 134     int w_align= 1;
 135     int h_align= 1;
 136
 137     switch(s->pix_fmt){
 138     case PIX_FMT_YUV420P:
 139     case PIX_FMT_YUYV422:
 140     case PIX_FMT_UYVY422:
 141     case PIX_FMT_YUV422P:
 142     case PIX_FMT_YUV440P:
 143     case PIX_FMT_YUV444P:
 144     case PIX_FMT_GBRP:
 145     case PIX_FMT_GRAY8:
 146     case PIX_FMT_GRAY16BE:
 147     case PIX_FMT_GRAY16LE:
 148     case PIX_FMT_YUVJ420P:
 149     case PIX_FMT_YUVJ422P:
 150     case PIX_FMT_YUVJ440P:
 151     case PIX_FMT_YUVJ444P:
 152     case PIX_FMT_YUVA420P:
 153     case PIX_FMT_YUV420P9LE:
 154     case PIX_FMT_YUV420P9BE:
 155     case PIX_FMT_YUV420P10LE:
 156     case PIX_FMT_YUV420P10BE:
 157     case PIX_FMT_YUV422P9LE:
 158     case PIX_FMT_YUV422P9BE:
 159     case PIX_FMT_YUV422P10LE:
 160     case PIX_FMT_YUV422P10BE:
 161     case PIX_FMT_YUV444P9LE:
 162     case PIX_FMT_YUV444P9BE:
 163     case PIX_FMT_YUV444P10LE:
 164     case PIX_FMT_YUV444P10BE:
 165     case PIX_FMT_GBRP9LE:
 166     case PIX_FMT_GBRP9BE:
 167     case PIX_FMT_GBRP10LE:
 168     case PIX_FMT_GBRP10BE:
 169         w_align = 16; //FIXME assume 16 pixel per macroblock
 170         h_align = 16 * 2; // interlaced needs 2 macroblocks height
 171         break;
 172     case PIX_FMT_YUV411P:
 173     case PIX_FMT_UYYVYY411:
 174         w_align=32;
 175         h_align=8;
 176         break;
 177     case PIX_FMT_YUV410P:
 178         if(s->codec_id == CODEC_ID_SVQ1){
 179             w_align=64;
 180             h_align=64;
 181         }
 182     case PIX_FMT_RGB555:
 183         if(s->codec_id == CODEC_ID_RPZA){
 184             w_align=4;
 185             h_align=4;
 186         }
 187     case PIX_FMT_PAL8:
 188     case PIX_FMT_BGR8:
 189     case PIX_FMT_RGB8:
 190         if(s->codec_id == CODEC_ID_SMC){
 191             w_align=4;
 192             h_align=4;
 193         }
 194         break;
 195     case PIX_FMT_BGR24:
 196         if((s->codec_id == CODEC_ID_MSZH) || (s->codec_id == CODEC_ID_ZLIB)){
 197             w_align=4;
 198             h_align=4;
 199         }
 200         break;
 201     default:
 202         w_align= 1;
 203         h_align= 1;
 204         break;
 205     }
 206
 207     *width = FFALIGN(*width , w_align);
 208     *height= FFALIGN(*height, h_align);
 209     if(s->codec_id == CODEC_ID_H264 || s->lowres)
 210         *height+=2; // some of the optimized chroma MC reads one line too much
 211                     // which is also done in mpeg decoders with lowres > 0
 212
 213     for (i = 0; i < AV_NUM_DATA_POINTERS; i++)
 214         linesize_align[i] = STRIDE_ALIGN;
 215 //STRIDE_ALIGN is 8 for SSE* but this does not work for SVQ1 chroma planes
 216 //we could change STRIDE_ALIGN to 16 for x86/sse but it would increase the
 217 //picture size unneccessarily in some cases. The solution here is not
 218 //pretty and better ideas are welcome!
 219 #if HAVE_MMX
 220     if(s->codec_id == CODEC_ID_SVQ1 || s->codec_id == CODEC_ID_VP5 ||
 221        s->codec_id == CODEC_ID_VP6 || s->codec_id == CODEC_ID_VP6F ||
 222        s->codec_id == CODEC_ID_VP6A) {
 223         for (i = 0; i < AV_NUM_DATA_POINTERS; i++)
 224             linesize_align[i] = 16;
 225     }
 226 #endif
 227 }
 228
 229 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height){
 230     int chroma_shift = av_pix_fmt_descriptors[s->pix_fmt].log2_chroma_w;
 231     int linesize_align[AV_NUM_DATA_POINTERS];
 232     int align;
 233     avcodec_align_dimensions2(s, width, height, linesize_align);
 234     align = FFMAX(linesize_align[0], linesize_align[3]);
 235     linesize_align[1] <<= chroma_shift;
 236     linesize_align[2] <<= chroma_shift;
 237     align = FFMAX3(align, linesize_align[1], linesize_align[2]);
 238     *width=FFALIGN(*width, align);
 239 }
 240
 241 static int audio_get_buffer(AVCodecContext *avctx, AVFrame *frame)
 242 {
 243     AVCodecInternal *avci = avctx->internal;
 244     InternalBuffer *buf;
 245     int buf_size, ret, i, needs_extended_data;
 246
 247     buf_size = av_samples_get_buffer_size(NULL, avctx->channels,
 248                                           frame->nb_samples, avctx->sample_fmt,
 249                                           32);
 250     if (buf_size < 0)
 251         return AVERROR(EINVAL);
 252
 253     needs_extended_data = av_sample_fmt_is_planar(avctx->sample_fmt) &&
 254                           avctx->channels > AV_NUM_DATA_POINTERS;
 255
 256     /* allocate InternalBuffer if needed */
 257     if (!avci->buffer) {
 258         avci->buffer = av_mallocz(sizeof(InternalBuffer));
 259         if (!avci->buffer)
 260             return AVERROR(ENOMEM);
 261     }
 262     buf = avci->buffer;
 263
 264     /* if there is a previously-used internal buffer, check its size and
 265        channel count to see if we can reuse it */
 266     if (buf->extended_data) {
 267         /* if current buffer is too small, free it */
 268         if (buf->extended_data[0] && buf_size > buf->audio_data_size) {
 269             av_free(buf->extended_data[0]);
 270             if (buf->extended_data != buf->data)
 271                 av_free(&buf->extended_data);
 272             buf->extended_data = NULL;
 273             buf->data[0] = NULL;
 274         }
 275         /* if number of channels has changed, reset and/or free extended data
 276            pointers but leave data buffer in buf->data[0] for reuse */
 277         if (buf->nb_channels != avctx->channels) {
 278             if (buf->extended_data != buf->data)
 279                 av_free(buf->extended_data);
 280             buf->extended_data = NULL;
 281         }
 282     }
 283
 284     /* if there is no previous buffer or the previous buffer cannot be used
 285        as-is, allocate a new buffer and/or rearrange the channel pointers */
 286     if (!buf->extended_data) {
 287         /* if the channel pointers will fit, just set extended_data to data,
 288            otherwise allocate the extended_data channel pointers */
 289         if (needs_extended_data) {
 290             buf->extended_data = av_mallocz(avctx->channels *
 291                                             sizeof(*buf->extended_data));
 292             if (!buf->extended_data)
 293                 return AVERROR(ENOMEM);
 294         } else {
 295             buf->extended_data = buf->data;
 296         }
 297
 298         /* if there is a previous buffer and it is large enough, reuse it and
 299            just fill-in new channel pointers and linesize, otherwise allocate
 300            a new buffer */
 301         if (buf->extended_data[0]) {
 302             ret = av_samples_fill_arrays(buf->extended_data, &buf->linesize[0],
 303                                          buf->extended_data[0], avctx->channels,
 304                                          frame->nb_samples, avctx->sample_fmt,
 305                                          32);
 306         } else {
 307             ret = av_samples_alloc(buf->extended_data, &buf->linesize[0],
 308                                    avctx->channels, frame->nb_samples,
 309                                    avctx->sample_fmt, 32);
 310         }
 311         if (ret)
 312             return ret;
 313
 314         /* if data was not used for extended_data, we need to copy as many of
 315            the extended_data channel pointers as will fit */
 316         if (needs_extended_data) {
 317             for (i = 0; i < AV_NUM_DATA_POINTERS; i++)
 318                 buf->data[i] = buf->extended_data[i];
 319         }
 320         buf->audio_data_size = buf_size;
 321         buf->nb_channels     = avctx->channels;
 322     }
 323
 324     /* copy InternalBuffer info to the AVFrame */
 325     frame->type          = FF_BUFFER_TYPE_INTERNAL;
 326     frame->extended_data = buf->extended_data;
 327     frame->linesize[0]   = buf->linesize[0];
 328     memcpy(frame->data, buf->data, sizeof(frame->data));
 329
 330     if (avctx->pkt) frame->pkt_pts = avctx->pkt->pts;
 331     else            frame->pkt_pts = AV_NOPTS_VALUE;
 332     frame->reordered_opaque = avctx->reordered_opaque;
 333
 334     if (avctx->debug & FF_DEBUG_BUFFERS)
 335         av_log(avctx, AV_LOG_DEBUG, "default_get_buffer called on frame %p, "
 336                "internal audio buffer used\n", frame);
 337
 338     return 0;
 339 }
 340
 341 static int video_get_buffer(AVCodecContext *s, AVFrame *pic)
 342 {
 343     int i;
 344     int w= s->width;
 345     int h= s->height;
 346     InternalBuffer *buf;
 347     AVCodecInternal *avci = s->internal;
 348
 349     if(pic->data[0]!=NULL) {
 350         av_log(s, AV_LOG_ERROR, "pic->data[0]!=NULL in avcodec_default_get_buffer\n");
 351         return -1;
 352     }
 353     if(avci->buffer_count >= INTERNAL_BUFFER_SIZE) {
 354         av_log(s, AV_LOG_ERROR, "buffer_count overflow (missing release_buffer?)\n");
 355         return -1;
 356     }
 357
 358     if(av_image_check_size(w, h, 0, s))
 359         return -1;
 360
 361     if (!avci->buffer) {
 362         avci->buffer = av_mallocz((INTERNAL_BUFFER_SIZE+1) *
 363                                   sizeof(InternalBuffer));
 364     }
 365
 366     buf = &avci->buffer[avci->buffer_count];
 367
 368     if(buf->base[0] && (buf->width != w || buf->height != h || buf->pix_fmt != s->pix_fmt)){
 369         if(s->active_thread_type&FF_THREAD_FRAME) {
 370             av_log_missing_feature(s, "Width/height changing with frame threads is", 0);
 371             return -1;
 372         }
 373
 374         for (i = 0; i < AV_NUM_DATA_POINTERS; i++) {
 375             av_freep(&buf->base[i]);
 376             buf->data[i]= NULL;
 377         }
 378     }
 379
 380     if (!buf->base[0]) {
 381         int h_chroma_shift, v_chroma_shift;
 382         int size[4] = {0};
 383         int tmpsize;
 384         int unaligned;
 385         AVPicture picture;
 386         int stride_align[AV_NUM_DATA_POINTERS];
 387         const int pixel_size = av_pix_fmt_descriptors[s->pix_fmt].comp[0].step_minus1+1;
 388
 389         avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
 390
 391         avcodec_align_dimensions2(s, &w, &h, stride_align);
 392
 393         if(!(s->flags&CODEC_FLAG_EMU_EDGE)){
 394             w+= EDGE_WIDTH*2;
 395             h+= EDGE_WIDTH*2;
 396         }
 397
 398         do {
 399             // NOTE: do not align linesizes individually, this breaks e.g. assumptions
 400             // that linesize[0] == 2*linesize[1] in the MPEG-encoder for 4:2:2
 401             av_image_fill_linesizes(picture.linesize, s->pix_fmt, w);
 402             // increase alignment of w for next try (rhs gives the lowest bit set in w)
 403             w += w & ~(w-1);
 404
 405             unaligned = 0;
 406             for (i=0; i<4; i++){
 407                 unaligned |= picture.linesize[i] % stride_align[i];
 408             }
 409         } while (unaligned);
 410
 411         tmpsize = av_image_fill_pointers(picture.data, s->pix_fmt, h, NULL, picture.linesize);
 412         if (tmpsize < 0)
 413             return -1;
 414
 415         for (i=0; i<3 && picture.data[i+1]; i++)
 416             size[i] = picture.data[i+1] - picture.data[i];
 417         size[i] = tmpsize - (picture.data[i] - picture.data[0]);
 418
 419         memset(buf->base, 0, sizeof(buf->base));
 420         memset(buf->data, 0, sizeof(buf->data));
 421
 422         for(i=0; i<4 && size[i]; i++){
 423             const int h_shift= i==0 ? 0 : h_chroma_shift;
 424             const int v_shift= i==0 ? 0 : v_chroma_shift;
 425
 426             buf->linesize[i]= picture.linesize[i];
 427
 428             buf->base[i]= av_malloc(size[i]+16); //FIXME 16
 429             if(buf->base[i]==NULL) return -1;
 430             memset(buf->base[i], 128, size[i]);
 431
 432             // no edge if EDGE EMU or not planar YUV
 433             if((s->flags&CODEC_FLAG_EMU_EDGE) || !size[2])
 434                 buf->data[i] = buf->base[i];
 435             else
 436                 buf->data[i] = buf->base[i] + FFALIGN((buf->linesize[i]*EDGE_WIDTH>>v_shift) + (pixel_size*EDGE_WIDTH>>h_shift), stride_align[i]);
 437         }
 438         for (; i < AV_NUM_DATA_POINTERS; i++) {
 439             buf->base[i] = buf->data[i] = NULL;
 440             buf->linesize[i] = 0;
 441         }
 442         if(size[1] && !size[2])
 443             ff_set_systematic_pal2((uint32_t*)buf->data[1], s->pix_fmt);
 444         buf->width  = s->width;
 445         buf->height = s->height;
 446         buf->pix_fmt= s->pix_fmt;
 447     }
 448     pic->type= FF_BUFFER_TYPE_INTERNAL;
 449
 450     for (i = 0; i < AV_NUM_DATA_POINTERS; i++) {
 451         pic->base[i]= buf->base[i];
 452         pic->data[i]= buf->data[i];
 453         pic->linesize[i]= buf->linesize[i];
 454     }
 455     pic->extended_data = pic->data;
 456     avci->buffer_count++;
 457
 458     if(s->pkt) pic->pkt_pts= s->pkt->pts;
 459     else       pic->pkt_pts= AV_NOPTS_VALUE;
 460     pic->reordered_opaque= s->reordered_opaque;
 461
 462     if(s->debug&FF_DEBUG_BUFFERS)
 463         av_log(s, AV_LOG_DEBUG, "default_get_buffer called on pic %p, %d "
 464                "buffers used\n", pic, avci->buffer_count);
 465
 466     return 0;
 467 }
 468
 469 int avcodec_default_get_buffer(AVCodecContext *avctx, AVFrame *frame)
 470 {
 471     switch (avctx->codec_type) {
 472     case AVMEDIA_TYPE_VIDEO:
 473         return video_get_buffer(avctx, frame);
 474     case AVMEDIA_TYPE_AUDIO:
 475         return audio_get_buffer(avctx, frame);
 476     default:
 477         return -1;
 478     }
 479 }
 480
 481 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic){
 482     int i;
 483     InternalBuffer *buf, *last;
 484     AVCodecInternal *avci = s->internal;
 485
 486     assert(s->codec_type == AVMEDIA_TYPE_VIDEO);
 487
 488     assert(pic->type==FF_BUFFER_TYPE_INTERNAL);
 489     assert(avci->buffer_count);
 490
 491     if (avci->buffer) {
 492         buf = NULL; /* avoids warning */
 493         for (i = 0; i < avci->buffer_count; i++) { //just 3-5 checks so is not worth to optimize
 494             buf = &avci->buffer[i];
 495             if (buf->data[0] == pic->data[0])
 496                 break;
 497         }
 498         assert(i < avci->buffer_count);
 499         avci->buffer_count--;
 500         last = &avci->buffer[avci->buffer_count];
 501
 502         if (buf != last)
 503             FFSWAP(InternalBuffer, *buf, *last);
 504     }
 505
 506     for (i = 0; i < AV_NUM_DATA_POINTERS; i++) {
 507         pic->data[i]=NULL;
 508 //        pic->base[i]=NULL;
 509     }
 510 //printf("R%X\n", pic->opaque);
 511
 512     if(s->debug&FF_DEBUG_BUFFERS)
 513         av_log(s, AV_LOG_DEBUG, "default_release_buffer called on pic %p, %d "
 514                "buffers used\n", pic, avci->buffer_count);
 515 }
 516
 517 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic){
 518     AVFrame temp_pic;
 519     int i;
 520
 521     assert(s->codec_type == AVMEDIA_TYPE_VIDEO);
 522
 523     /* If no picture return a new buffer */
 524     if(pic->data[0] == NULL) {
 525         /* We will copy from buffer, so must be readable */
 526         pic->buffer_hints |= FF_BUFFER_HINTS_READABLE;
 527         return s->get_buffer(s, pic);
 528     }
 529
 530     /* If internal buffer type return the same buffer */
 531     if(pic->type == FF_BUFFER_TYPE_INTERNAL) {
 532         if(s->pkt) pic->pkt_pts= s->pkt->pts;
 533         else       pic->pkt_pts= AV_NOPTS_VALUE;
 534         pic->reordered_opaque= s->reordered_opaque;
 535         return 0;
 536     }
 537
 538     /*
 539      * Not internal type and reget_buffer not overridden, emulate cr buffer
 540      */
 541     temp_pic = *pic;
 542     for(i = 0; i < AV_NUM_DATA_POINTERS; i++)
 543         pic->data[i] = pic->base[i] = NULL;
 544     pic->opaque = NULL;
 545     /* Allocate new frame */
 546     if (s->get_buffer(s, pic))
 547         return -1;
 548     /* Copy image data from old buffer to new buffer */
 549     av_picture_copy((AVPicture*)pic, (AVPicture*)&temp_pic, s->pix_fmt, s->width,
 550              s->height);
 551     s->release_buffer(s, &temp_pic); // Release old frame
 552     return 0;
 553 }
 554
 555 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size){
 556     int i;
 557
 558     for(i=0; i<count; i++){
 559         int r= func(c, (char*)arg + i*size);
 560         if(ret) ret[i]= r;
 561     }
 562     return 0;
 563 }
 564
 565 int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int jobnr, int threadnr),void *arg, int *ret, int count){
 566     int i;
 567
 568     for(i=0; i<count; i++){
 569         int r= func(c, arg, i, 0);
 570         if(ret) ret[i]= r;
 571     }
 572     return 0;
 573 }
 574
 575 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat *fmt){
 576     while (*fmt != PIX_FMT_NONE && ff_is_hwaccel_pix_fmt(*fmt))
 577         ++fmt;
 578     return fmt[0];
 579 }
 580
 581 void avcodec_get_frame_defaults(AVFrame *pic){
 582     memset(pic, 0, sizeof(AVFrame));
 583
 584     pic->pts= AV_NOPTS_VALUE;
 585     pic->key_frame= 1;
 586 }
 587
 588 AVFrame *avcodec_alloc_frame(void){
 589     AVFrame *pic= av_malloc(sizeof(AVFrame));
 590
 591     if(pic==NULL) return NULL;
 592
 593     avcodec_get_frame_defaults(pic);
 594
 595     return pic;
 596 }
 597
 598 #if FF_API_AVCODEC_OPEN
 599 int attribute_align_arg avcodec_open(AVCodecContext *avctx, AVCodec *codec)
 600 {
 601     return avcodec_open2(avctx, codec, NULL);
 602 }
 603 #endif
 604
 605 int attribute_align_arg avcodec_open2(AVCodecContext *avctx, AVCodec *codec, AVDictionary **options)
 606 {
 607     int ret = 0;
 608     AVDictionary *tmp = NULL;
 609
 610     if (options)
 611         av_dict_copy(&tmp, *options, 0);
 612
 613     /* If there is a user-supplied mutex locking routine, call it. */
 614     if (ff_lockmgr_cb) {
 615         if ((*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
 616             return -1;
 617     }
 618
 619     entangled_thread_counter++;
 620     if(entangled_thread_counter != 1){
 621         av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
 622         ret = -1;
 623         goto end;
 624     }
 625
 626     if(avctx->codec || !codec) {
 627         ret = AVERROR(EINVAL);
 628         goto end;
 629     }
 630
 631     avctx->internal = av_mallocz(sizeof(AVCodecInternal));
 632     if (!avctx->internal) {
 633         ret = AVERROR(ENOMEM);
 634         goto end;
 635     }
 636
 637     if (codec->priv_data_size > 0) {
 638       if(!avctx->priv_data){
 639         avctx->priv_data = av_mallocz(codec->priv_data_size);
 640         if (!avctx->priv_data) {
 641             ret = AVERROR(ENOMEM);
 642             goto end;
 643         }
 644         if (codec->priv_class) {
 645             *(AVClass**)avctx->priv_data= codec->priv_class;
 646             av_opt_set_defaults(avctx->priv_data);
 647         }
 648       }
 649       if (codec->priv_class && (ret = av_opt_set_dict(avctx->priv_data, &tmp)) < 0)
 650           goto free_and_end;
 651     } else {
 652         avctx->priv_data = NULL;
 653     }
 654     if ((ret = av_opt_set_dict(avctx, &tmp)) < 0)
 655         goto free_and_end;
 656
 657     if(avctx->coded_width && avctx->coded_height)
 658         avcodec_set_dimensions(avctx, avctx->coded_width, avctx->coded_height);
 659     else if(avctx->width && avctx->height)
 660         avcodec_set_dimensions(avctx, avctx->width, avctx->height);
 661
 662     if ((avctx->coded_width || avctx->coded_height || avctx->width || avctx->height)
 663         && (  av_image_check_size(avctx->coded_width, avctx->coded_height, 0, avctx) < 0
 664            || av_image_check_size(avctx->width,       avctx->height,       0, avctx) < 0)) {
 665         av_log(avctx, AV_LOG_WARNING, "ignoring invalid width/height values\n");
 666         avcodec_set_dimensions(avctx, 0, 0);
 667     }
 668
 669     /* if the decoder init function was already called previously,
 670        free the already allocated subtitle_header before overwriting it */
 671     if (codec->decode)
 672         av_freep(&avctx->subtitle_header);
 673
 674 #define SANE_NB_CHANNELS 128U
 675     if (avctx->channels > SANE_NB_CHANNELS) {
 676         ret = AVERROR(EINVAL);
 677         goto free_and_end;
 678     }
 679
 680     avctx->codec = codec;
 681     if ((avctx->codec_type == AVMEDIA_TYPE_UNKNOWN || avctx->codec_type == codec->type) &&
 682         avctx->codec_id == CODEC_ID_NONE) {
 683         avctx->codec_type = codec->type;
 684         avctx->codec_id   = codec->id;
 685     }
 686     if (avctx->codec_id != codec->id || (avctx->codec_type != codec->type
 687                            && avctx->codec_type != AVMEDIA_TYPE_ATTACHMENT)) {
 688         av_log(avctx, AV_LOG_ERROR, "codec type or id mismatches\n");
 689         ret = AVERROR(EINVAL);
 690         goto free_and_end;
 691     }
 692     avctx->frame_number = 0;
 693 #if FF_API_ER
 694
 695     av_log(avctx, AV_LOG_DEBUG, "err{or,}_recognition separate: %d; %d\n",
 696            avctx->error_recognition, avctx->err_recognition);
 697     /* FF_ER_CAREFUL (==1) implies AV_EF_CRCCHECK (== 1<<1 - 1),
 698        FF_ER_COMPLIANT (==2) implies AV_EF_{CRCCHECK,BITSTREAM} (== 1<<2 - 1), et cetera} */
 699     avctx->err_recognition |= (1<<(avctx->error_recognition-(avctx->error_recognition>=FF_ER_VERY_AGGRESSIVE))) - 1;
 700     av_log(avctx, AV_LOG_DEBUG, "err{or,}_recognition combined: %d; %d\n",
 701            avctx->error_recognition, avctx->err_recognition);
 702 #endif
 703
 704     if (HAVE_THREADS && !avctx->thread_opaque) {
 705         ret = ff_thread_init(avctx);
 706         if (ret < 0) {
 707             goto free_and_end;
 708         }
 709     }
 710
 711     if (avctx->codec->max_lowres < avctx->lowres) {
 712         av_log(avctx, AV_LOG_ERROR, "The maximum value for lowres supported by the decoder is %d\n",
 713                avctx->codec->max_lowres);
 714         ret = AVERROR(EINVAL);
 715         goto free_and_end;
 716     }
 717     if (avctx->codec->encode) {
 718         int i;
 719         if (avctx->codec->sample_fmts) {
 720             for (i = 0; avctx->codec->sample_fmts[i] != AV_SAMPLE_FMT_NONE; i++)
 721                 if (avctx->sample_fmt == avctx->codec->sample_fmts[i])
 722                     break;
 723             if (avctx->codec->sample_fmts[i] == AV_SAMPLE_FMT_NONE) {
 724                 av_log(avctx, AV_LOG_ERROR, "Specified sample_fmt is not supported.\n");
 725                 ret = AVERROR(EINVAL);
 726                 goto free_and_end;
 727             }
 728         }
 729         if (avctx->codec->supported_samplerates) {
 730             for (i = 0; avctx->codec->supported_samplerates[i] != 0; i++)
 731                 if (avctx->sample_rate == avctx->codec->supported_samplerates[i])
 732                     break;
 733             if (avctx->codec->supported_samplerates[i] == 0) {
 734                 av_log(avctx, AV_LOG_ERROR, "Specified sample_rate is not supported\n");
 735                 ret = AVERROR(EINVAL);
 736                 goto free_and_end;
 737             }
 738         }
 739         if (avctx->codec->channel_layouts) {
 740             if (!avctx->channel_layout) {
 741                 av_log(avctx, AV_LOG_WARNING, "channel_layout not specified\n");
 742             } else {
 743                 for (i = 0; avctx->codec->channel_layouts[i] != 0; i++)
 744                     if (avctx->channel_layout == avctx->codec->channel_layouts[i])
 745                         break;
 746                 if (avctx->codec->channel_layouts[i] == 0) {
 747                     av_log(avctx, AV_LOG_ERROR, "Specified channel_layout is not supported\n");
 748                     ret = AVERROR(EINVAL);
 749                     goto free_and_end;
 750                 }
 751             }
 752         }
 753         if (avctx->channel_layout && avctx->channels) {
 754             if (av_get_channel_layout_nb_channels(avctx->channel_layout) != avctx->channels) {
 755                 av_log(avctx, AV_LOG_ERROR, "channel layout does not match number of channels\n");
 756                 ret = AVERROR(EINVAL);
 757                 goto free_and_end;
 758             }
 759         } else if (avctx->channel_layout) {
 760             avctx->channels = av_get_channel_layout_nb_channels(avctx->channel_layout);
 761         }
 762     }
 763
 764     if(avctx->codec->init && !(avctx->active_thread_type&FF_THREAD_FRAME)){
 765         ret = avctx->codec->init(avctx);
 766         if (ret < 0) {
 767             goto free_and_end;
 768         }
 769     }
 770 end:
 771     entangled_thread_counter--;
 772
 773     /* Release any user-supplied mutex. */
 774     if (ff_lockmgr_cb) {
 775         (*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
 776     }
 777     if (options) {
 778         av_dict_free(options);
 779         *options = tmp;
 780     }
 781
 782     return ret;
 783 free_and_end:
 784     av_dict_free(&tmp);
 785     av_freep(&avctx->priv_data);
 786     av_freep(&avctx->internal);
 787     avctx->codec= NULL;
 788     goto end;
 789 }
 790
 791 int attribute_align_arg avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
 792                          const short *samples)
 793 {
 794     if(buf_size < FF_MIN_BUFFER_SIZE && 0){
 795         av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
 796         return -1;
 797     }
 798     if((avctx->codec->capabilities & CODEC_CAP_DELAY) || samples){
 799         int ret = avctx->codec->encode(avctx, buf, buf_size, samples);
 800         avctx->frame_number++;
 801         return ret;
 802     }else
 803         return 0;
 804 }
 805
 806 int attribute_align_arg avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
 807                          const AVFrame *pict)
 808 {
 809     if(buf_size < FF_MIN_BUFFER_SIZE){
 810         av_log(avctx, AV_LOG_ERROR, "buffer smaller than minimum size\n");
 811         return -1;
 812     }
 813     if(av_image_check_size(avctx->width, avctx->height, 0, avctx))
 814         return -1;
 815     if((avctx->codec->capabilities & CODEC_CAP_DELAY) || pict){
 816         int ret = avctx->codec->encode(avctx, buf, buf_size, pict);
 817         avctx->frame_number++;
 818         emms_c(); //needed to avoid an emms_c() call before every return;
 819
 820         return ret;
 821     }else
 822         return 0;
 823 }
 824
 825 int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
 826                             const AVSubtitle *sub)
 827 {
 828     int ret;
 829     if(sub->start_display_time) {
 830         av_log(avctx, AV_LOG_ERROR, "start_display_time must be 0.\n");
 831         return -1;
 832     }
 833     if(sub->num_rects == 0 || !sub->rects)
 834         return -1;
 835     ret = avctx->codec->encode(avctx, buf, buf_size, sub);
 836     avctx->frame_number++;
 837     return ret;
 838 }
 839
 840 int attribute_align_arg avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
 841                          int *got_picture_ptr,
 842                          AVPacket *avpkt)
 843 {
 844     int ret;
 845
 846     *got_picture_ptr= 0;
 847     if((avctx->coded_width||avctx->coded_height) && av_image_check_size(avctx->coded_width, avctx->coded_height, 0, avctx))
 848         return -1;
 849
 850     avctx->pkt = avpkt;
 851
 852     if((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size || (avctx->active_thread_type&FF_THREAD_FRAME)){
 853         if (HAVE_THREADS && avctx->active_thread_type&FF_THREAD_FRAME)
 854              ret = ff_thread_decode_frame(avctx, picture, got_picture_ptr,
 855                                           avpkt);
 856         else {
 857             ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
 858                               avpkt);
 859             picture->pkt_dts= avpkt->dts;
 860         }
 861
 862         emms_c(); //needed to avoid an emms_c() call before every return;
 863
 864         if (*got_picture_ptr)
 865             avctx->frame_number++;
 866     }else
 867         ret= 0;
 868
 869     return ret;
 870 }
 871
 872 #if FF_API_OLD_DECODE_AUDIO
 873 int attribute_align_arg avcodec_decode_audio3(AVCodecContext *avctx, int16_t *samples,
 874                          int *frame_size_ptr,
 875                          AVPacket *avpkt)
 876 {
 877     AVFrame frame;
 878     int ret, got_frame = 0;
 879
 880     if (avctx->get_buffer != avcodec_default_get_buffer) {
 881         av_log(avctx, AV_LOG_ERROR, "A custom get_buffer() cannot be used with "
 882                "avcodec_decode_audio3()\n");
 883         return AVERROR(EINVAL);
 884     }
 885
 886     ret = avcodec_decode_audio4(avctx, &frame, &got_frame, avpkt);
 887
 888     if (ret >= 0 && got_frame) {
 889         int ch, plane_size;
 890         int planar = av_sample_fmt_is_planar(avctx->sample_fmt);
 891         int data_size = av_samples_get_buffer_size(&plane_size, avctx->channels,
 892                                                    frame.nb_samples,
 893                                                    avctx->sample_fmt, 1);
 894         if (*frame_size_ptr < data_size) {
 895             av_log(avctx, AV_LOG_ERROR, "output buffer size is too small for "
 896                    "the current frame (%d < %d)\n", *frame_size_ptr, data_size);
 897             return AVERROR(EINVAL);
 898         }
 899
 900         memcpy(samples, frame.extended_data[0], plane_size);
 901
 902         if (planar && avctx->channels > 1) {
 903             uint8_t *out = ((uint8_t *)samples) + plane_size;
 904             for (ch = 1; ch < avctx->channels; ch++) {
 905                 memcpy(out, frame.extended_data[ch], plane_size);
 906                 out += plane_size;
 907             }
 908         }
 909         *frame_size_ptr = data_size;
 910     } else {
 911         *frame_size_ptr = 0;
 912     }
 913     return ret;
 914 }
 915 #endif
 916
 917 int attribute_align_arg avcodec_decode_audio4(AVCodecContext *avctx,
 918                                               AVFrame *frame,
 919                                               int *got_frame_ptr,
 920                                               AVPacket *avpkt)
 921 {
 922     int ret = 0;
 923
 924     *got_frame_ptr = 0;
 925
 926     avctx->pkt = avpkt;
 927
 928     if (!avpkt->data && avpkt->size) {
 929         av_log(avctx, AV_LOG_ERROR, "invalid packet: NULL data, size != 0\n");
 930         return AVERROR(EINVAL);
 931     }
 932
 933     if ((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size) {
 934         ret = avctx->codec->decode(avctx, frame, got_frame_ptr, avpkt);
 935         if (ret >= 0 && *got_frame_ptr) {
 936             avctx->frame_number++;
 937             frame->pkt_dts = avpkt->dts;
 938         }
 939     }
 940     return ret;
 941 }
 942
 943 int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
 944                             int *got_sub_ptr,
 945                             AVPacket *avpkt)
 946 {
 947     int ret;
 948
 949     avctx->pkt = avpkt;
 950     *got_sub_ptr = 0;
 951     ret = avctx->codec->decode(avctx, sub, got_sub_ptr, avpkt);
 952     if (*got_sub_ptr)
 953         avctx->frame_number++;
 954     return ret;
 955 }
 956
 957 void avsubtitle_free(AVSubtitle *sub)
 958 {
 959     int i;
 960
 961     for (i = 0; i < sub->num_rects; i++)
 962     {
 963         av_freep(&sub->rects[i]->pict.data[0]);
 964         av_freep(&sub->rects[i]->pict.data[1]);
 965         av_freep(&sub->rects[i]->pict.data[2]);
 966         av_freep(&sub->rects[i]->pict.data[3]);
 967         av_freep(&sub->rects[i]->text);
 968         av_freep(&sub->rects[i]->ass);
 969         av_freep(&sub->rects[i]);
 970     }
 971
 972     av_freep(&sub->rects);
 973
 974     memset(sub, 0, sizeof(AVSubtitle));
 975 }
 976
 977 av_cold int avcodec_close(AVCodecContext *avctx)
 978 {
 979     /* If there is a user-supplied mutex locking routine, call it. */
 980     if (ff_lockmgr_cb) {
 981         if ((*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
 982             return -1;
 983     }
 984
 985     entangled_thread_counter++;
 986     if(entangled_thread_counter != 1){
 987         av_log(avctx, AV_LOG_ERROR, "insufficient thread locking around avcodec_open/close()\n");
 988         entangled_thread_counter--;
 989         return -1;
 990     }
 991
 992     if (HAVE_THREADS && avctx->thread_opaque)
 993         ff_thread_free(avctx);
 994     if (avctx->codec && avctx->codec->close)
 995         avctx->codec->close(avctx);
 996     avcodec_default_free_buffers(avctx);
 997     avctx->coded_frame = NULL;
 998     av_freep(&avctx->internal);
 999     if (avctx->codec && avctx->codec->priv_class)
1000         av_opt_free(avctx->priv_data);
1001     av_opt_free(avctx);
1002     av_freep(&avctx->priv_data);
1003     if(avctx->codec && avctx->codec->encode)
1004         av_freep(&avctx->extradata);
1005     avctx->codec = NULL;
1006     avctx->active_thread_type = 0;
1007     entangled_thread_counter--;
1008
1009     /* Release any user-supplied mutex. */
1010     if (ff_lockmgr_cb) {
1011         (*ff_lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
1012     }
1013     return 0;
1014 }
1015
1016 AVCodec *avcodec_find_encoder(enum CodecID id)
1017 {
1018     AVCodec *p, *experimental=NULL;
1019     p = first_avcodec;
1020     while (p) {
1021         if (p->encode != NULL && p->id == id) {
1022             if (p->capabilities & CODEC_CAP_EXPERIMENTAL && !experimental) {
1023                 experimental = p;
1024             } else
1025                 return p;
1026         }
1027         p = p->next;
1028     }
1029     return experimental;
1030 }
1031
1032 AVCodec *avcodec_find_encoder_by_name(const char *name)
1033 {
1034     AVCodec *p;
1035     if (!name)
1036         return NULL;
1037     p = first_avcodec;
1038     while (p) {
1039         if (p->encode != NULL && strcmp(name,p->name) == 0)
1040             return p;
1041         p = p->next;
1042     }
1043     return NULL;
1044 }
1045
1046 AVCodec *avcodec_find_decoder(enum CodecID id)
1047 {
1048     AVCodec *p;
1049     p = first_avcodec;
1050     while (p) {
1051         if (p->decode != NULL && p->id == id)
1052             return p;
1053         p = p->next;
1054     }
1055     return NULL;
1056 }
1057
1058 AVCodec *avcodec_find_decoder_by_name(const char *name)
1059 {
1060     AVCodec *p;
1061     if (!name)
1062         return NULL;
1063     p = first_avcodec;
1064     while (p) {
1065         if (p->decode != NULL && strcmp(name,p->name) == 0)
1066             return p;
1067         p = p->next;
1068     }
1069     return NULL;
1070 }
1071
1072 static int get_bit_rate(AVCodecContext *ctx)
1073 {
1074     int bit_rate;
1075     int bits_per_sample;
1076
1077     switch(ctx->codec_type) {
1078     case AVMEDIA_TYPE_VIDEO:
1079     case AVMEDIA_TYPE_DATA:
1080     case AVMEDIA_TYPE_SUBTITLE:
1081     case AVMEDIA_TYPE_ATTACHMENT:
1082         bit_rate = ctx->bit_rate;
1083         break;
1084     case AVMEDIA_TYPE_AUDIO:
1085         bits_per_sample = av_get_bits_per_sample(ctx->codec_id);
1086         bit_rate = bits_per_sample ? ctx->sample_rate * ctx->channels * bits_per_sample : ctx->bit_rate;
1087         break;
1088     default:
1089         bit_rate = 0;
1090         break;
1091     }
1092     return bit_rate;
1093 }
1094
1095 size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag)
1096 {
1097     int i, len, ret = 0;
1098
1099     for (i = 0; i < 4; i++) {
1100         len = snprintf(buf, buf_size,
1101                        isprint(codec_tag&0xFF) ? "%c" : "[%d]", codec_tag&0xFF);
1102         buf      += len;
1103         buf_size  = buf_size > len ? buf_size - len : 0;
1104         ret      += len;
1105         codec_tag>>=8;
1106     }
1107     return ret;
1108 }
1109
1110 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
1111 {
1112     const char *codec_name;
1113     const char *profile = NULL;
1114     AVCodec *p;
1115     char buf1[32];
1116     int bitrate;
1117     AVRational display_aspect_ratio;
1118
1119     if (encode)
1120         p = avcodec_find_encoder(enc->codec_id);
1121     else
1122         p = avcodec_find_decoder(enc->codec_id);
1123
1124     if (p) {
1125         codec_name = p->name;
1126         profile = av_get_profile_name(p, enc->profile);
1127     } else if (enc->codec_id == CODEC_ID_MPEG2TS) {
1128         /* fake mpeg2 transport stream codec (currently not
1129            registered) */
1130         codec_name = "mpeg2ts";
1131     } else if (enc->codec_name[0] != '\0') {
1132         codec_name = enc->codec_name;
1133     } else {
1134         /* output avi tags */
1135         char tag_buf[32];
1136         av_get_codec_tag_string(tag_buf, sizeof(tag_buf), enc->codec_tag);
1137         snprintf(buf1, sizeof(buf1), "%s / 0x%04X", tag_buf, enc->codec_tag);
1138         codec_name = buf1;
1139     }
1140
1141     switch(enc->codec_type) {
1142     case AVMEDIA_TYPE_VIDEO:
1143         snprintf(buf, buf_size,
1144                  "Video: %s%s",
1145                  codec_name, enc->mb_decision ? " (hq)" : "");
1146         if (profile)
1147             snprintf(buf + strlen(buf), buf_size - strlen(buf),
1148                      " (%s)", profile);
1149         if (enc->pix_fmt != PIX_FMT_NONE) {
1150             snprintf(buf + strlen(buf), buf_size - strlen(buf),
1151                      ", %s",
1152                      av_get_pix_fmt_name(enc->pix_fmt));
1153         }
1154         if (enc->width) {
1155             snprintf(buf + strlen(buf), buf_size - strlen(buf),
1156                      ", %dx%d",
1157                      enc->width, enc->height);
1158             if (enc->sample_aspect_ratio.num) {
1159                 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
1160                           enc->width*enc->sample_aspect_ratio.num,
1161                           enc->height*enc->sample_aspect_ratio.den,
1162                           1024*1024);
1163                 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1164                          " [PAR %d:%d DAR %d:%d]",
1165                          enc->sample_aspect_ratio.num, enc->sample_aspect_ratio.den,
1166                          display_aspect_ratio.num, display_aspect_ratio.den);
1167             }
1168             if(av_log_get_level() >= AV_LOG_DEBUG){
1169                 int g= av_gcd(enc->time_base.num, enc->time_base.den);
1170                 snprintf(buf + strlen(buf), buf_size - strlen(buf),
1171                      ", %d/%d",
1172                      enc->time_base.num/g, enc->time_base.den/g);
1173             }
1174         }
1175         if (encode) {
1176             snprintf(buf + strlen(buf), buf_size - strlen(buf),
1177                      ", q=%d-%d", enc->qmin, enc->qmax);
1178         }
1179         break;
1180     case AVMEDIA_TYPE_AUDIO:
1181         snprintf(buf, buf_size,
1182                  "Audio: %s",
1183                  codec_name);
1184         if (profile)
1185             snprintf(buf + strlen(buf), buf_size - strlen(buf),
1186                      " (%s)", profile);
1187         if (enc->sample_rate) {
1188             snprintf(buf + strlen(buf), buf_size - strlen(buf),
1189                      ", %d Hz", enc->sample_rate);
1190         }
1191         av_strlcat(buf, ", ", buf_size);
1192         av_get_channel_layout_string(buf + strlen(buf), buf_size - strlen(buf), enc->channels, enc->channel_layout);
1193         if (enc->sample_fmt != AV_SAMPLE_FMT_NONE) {
1194             snprintf(buf + strlen(buf), buf_size - strlen(buf),
1195                      ", %s", av_get_sample_fmt_name(enc->sample_fmt));
1196         }
1197         break;
1198     case AVMEDIA_TYPE_DATA:
1199         snprintf(buf, buf_size, "Data: %s", codec_name);
1200         break;
1201     case AVMEDIA_TYPE_SUBTITLE:
1202         snprintf(buf, buf_size, "Subtitle: %s", codec_name);
1203         break;
1204     case AVMEDIA_TYPE_ATTACHMENT:
1205         snprintf(buf, buf_size, "Attachment: %s", codec_name);
1206         break;
1207     default:
1208         snprintf(buf, buf_size, "Invalid Codec type %d", enc->codec_type);
1209         return;
1210     }
1211     if (encode) {
1212         if (enc->flags & CODEC_FLAG_PASS1)
1213             snprintf(buf + strlen(buf), buf_size - strlen(buf),
1214                      ", pass 1");
1215         if (enc->flags & CODEC_FLAG_PASS2)
1216             snprintf(buf + strlen(buf), buf_size - strlen(buf),
1217                      ", pass 2");
1218     }
1219     bitrate = get_bit_rate(enc);
1220     if (bitrate != 0) {
1221         snprintf(buf + strlen(buf), buf_size - strlen(buf),
1222                  ", %d kb/s", bitrate / 1000);
1223     }
1224 }
1225
1226 const char *av_get_profile_name(const AVCodec *codec, int profile)
1227 {
1228     const AVProfile *p;
1229     if (profile == FF_PROFILE_UNKNOWN || !codec->profiles)
1230         return NULL;
1231
1232     for (p = codec->profiles; p->profile != FF_PROFILE_UNKNOWN; p++)
1233         if (p->profile == profile)
1234             return p->name;
1235
1236     return NULL;
1237 }
1238
1239 unsigned avcodec_version( void )
1240 {
1241   return LIBAVCODEC_VERSION_INT;
1242 }
1243
1244 const char *avcodec_configuration(void)
1245 {
1246     return LIBAV_CONFIGURATION;
1247 }
1248
1249 const char *avcodec_license(void)
1250 {
1251 #define LICENSE_PREFIX "libavcodec license: "
1252     return LICENSE_PREFIX LIBAV_LICENSE + sizeof(LICENSE_PREFIX) - 1;
1253 }
1254
1255 void avcodec_flush_buffers(AVCodecContext *avctx)
1256 {
1257     if(HAVE_THREADS && avctx->active_thread_type&FF_THREAD_FRAME)
1258         ff_thread_flush(avctx);
1259     else if(avctx->codec->flush)
1260         avctx->codec->flush(avctx);
1261 }
1262
1263 static void video_free_buffers(AVCodecContext *s)
1264 {
1265     AVCodecInternal *avci = s->internal;
1266     int i, j;
1267
1268     if (!avci->buffer)
1269         return;
1270
1271     if (avci->buffer_count)
1272         av_log(s, AV_LOG_WARNING, "Found %i unreleased buffers!\n",
1273                avci->buffer_count);
1274     for(i=0; i<INTERNAL_BUFFER_SIZE; i++){
1275         InternalBuffer *buf = &avci->buffer[i];
1276         for(j=0; j<4; j++){
1277             av_freep(&buf->base[j]);
1278             buf->data[j]= NULL;
1279         }
1280     }
1281     av_freep(&avci->buffer);
1282
1283     avci->buffer_count=0;
1284 }
1285
1286 static void audio_free_buffers(AVCodecContext *avctx)
1287 {
1288     AVCodecInternal *avci = avctx->internal;
1289     InternalBuffer *buf;
1290
1291     if (!avci->buffer)
1292         return;
1293     buf = avci->buffer;
1294
1295     if (buf->extended_data) {
1296         av_free(buf->extended_data[0]);
1297         if (buf->extended_data != buf->data)
1298             av_free(buf->extended_data);
1299     }
1300     av_freep(&avci->buffer);
1301 }
1302
1303 void avcodec_default_free_buffers(AVCodecContext *avctx)
1304 {
1305     switch (avctx->codec_type) {
1306     case AVMEDIA_TYPE_VIDEO:
1307         video_free_buffers(avctx);
1308         break;
1309     case AVMEDIA_TYPE_AUDIO:
1310         audio_free_buffers(avctx);
1311         break;
1312     default:
1313         break;
1314     }
1315 }
1316
1317 #if FF_API_OLD_FF_PICT_TYPES
1318 char av_get_pict_type_char(int pict_type){
1319     return av_get_picture_type_char(pict_type);
1320 }
1321 #endif
1322
1323 int av_get_bits_per_sample(enum CodecID codec_id){
1324     switch(codec_id){
1325     case CODEC_ID_ADPCM_SBPRO_2:
1326         return 2;
1327     case CODEC_ID_ADPCM_SBPRO_3:
1328         return 3;
1329     case CODEC_ID_ADPCM_SBPRO_4:
1330     case CODEC_ID_ADPCM_CT:
1331     case CODEC_ID_ADPCM_IMA_WAV:
1332     case CODEC_ID_ADPCM_IMA_QT:
1333     case CODEC_ID_ADPCM_SWF:
1334     case CODEC_ID_ADPCM_MS:
1335     case CODEC_ID_ADPCM_YAMAHA:
1336     case CODEC_ID_ADPCM_G722:
1337         return 4;
1338     case CODEC_ID_PCM_ALAW:
1339     case CODEC_ID_PCM_MULAW:
1340     case CODEC_ID_PCM_S8:
1341     case CODEC_ID_PCM_U8:
1342     case CODEC_ID_PCM_ZORK:
1343         return 8;
1344     case CODEC_ID_PCM_S16BE:
1345     case CODEC_ID_PCM_S16LE:
1346     case CODEC_ID_PCM_S16LE_PLANAR:
1347     case CODEC_ID_PCM_U16BE:
1348     case CODEC_ID_PCM_U16LE:
1349         return 16;
1350     case CODEC_ID_PCM_S24DAUD:
1351     case CODEC_ID_PCM_S24BE:
1352     case CODEC_ID_PCM_S24LE:
1353     case CODEC_ID_PCM_U24BE:
1354     case CODEC_ID_PCM_U24LE:
1355         return 24;
1356     case CODEC_ID_PCM_S32BE:
1357     case CODEC_ID_PCM_S32LE:
1358     case CODEC_ID_PCM_U32BE:
1359     case CODEC_ID_PCM_U32LE:
1360     case CODEC_ID_PCM_F32BE:
1361     case CODEC_ID_PCM_F32LE:
1362         return 32;
1363     case CODEC_ID_PCM_F64BE:
1364     case CODEC_ID_PCM_F64LE:
1365         return 64;
1366     default:
1367         return 0;
1368     }
1369 }
1370
1371 #if FF_API_OLD_SAMPLE_FMT
1372 int av_get_bits_per_sample_format(enum AVSampleFormat sample_fmt) {
1373     return av_get_bytes_per_sample(sample_fmt) << 3;
1374 }
1375 #endif
1376
1377 #if !HAVE_THREADS
1378 int ff_thread_init(AVCodecContext *s){
1379     return -1;
1380 }
1381 #endif
1382
1383 unsigned int av_xiphlacing(unsigned char *s, unsigned int v)
1384 {
1385     unsigned int n = 0;
1386
1387     while(v >= 0xff) {
1388         *s++ = 0xff;
1389         v -= 0xff;
1390         n++;
1391     }
1392     *s = v;
1393     n++;
1394     return n;
1395 }
1396
1397 int ff_match_2uint16(const uint16_t (*tab)[2], int size, int a, int b){
1398     int i;
1399     for(i=0; i<size && !(tab[i][0]==a && tab[i][1]==b); i++);
1400     return i;
1401 }
1402
1403 void av_log_missing_feature(void *avc, const char *feature, int want_sample)
1404 {
1405     av_log(avc, AV_LOG_WARNING, "%s not implemented. Update your Libav "
1406             "version to the newest one from Git. If the problem still "
1407             "occurs, it means that your file has a feature which has not "
1408             "been implemented.\n", feature);
1409     if(want_sample)
1410         av_log_ask_for_sample(avc, NULL);
1411 }
1412
1413 void av_log_ask_for_sample(void *avc, const char *msg, ...)
1414 {
1415     va_list argument_list;
1416
1417     va_start(argument_list, msg);
1418
1419     if (msg)
1420         av_vlog(avc, AV_LOG_WARNING, msg, argument_list);
1421     av_log(avc, AV_LOG_WARNING, "If you want to help, upload a sample "
1422             "of this file to ftp://upload.libav.org/incoming/ "
1423             "and contact the libav-devel mailing list.\n");
1424
1425     va_end(argument_list);
1426 }
1427
1428 static AVHWAccel *first_hwaccel = NULL;
1429
1430 void av_register_hwaccel(AVHWAccel *hwaccel)
1431 {
1432     AVHWAccel **p = &first_hwaccel;
1433     while (*p)
1434         p = &(*p)->next;
1435     *p = hwaccel;
1436     hwaccel->next = NULL;
1437 }
1438
1439 AVHWAccel *av_hwaccel_next(AVHWAccel *hwaccel)
1440 {
1441     return hwaccel ? hwaccel->next : first_hwaccel;
1442 }
1443
1444 AVHWAccel *ff_find_hwaccel(enum CodecID codec_id, enum PixelFormat pix_fmt)
1445 {
1446     AVHWAccel *hwaccel=NULL;
1447
1448     while((hwaccel= av_hwaccel_next(hwaccel))){
1449         if (   hwaccel->id      == codec_id
1450             && hwaccel->pix_fmt == pix_fmt)
1451             return hwaccel;
1452     }
1453     return NULL;
1454 }
1455
1456 int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op))
1457 {
1458     if (ff_lockmgr_cb) {
1459         if (ff_lockmgr_cb(&codec_mutex, AV_LOCK_DESTROY))
1460             return -1;
1461         if (ff_lockmgr_cb(&avformat_mutex, AV_LOCK_DESTROY))
1462             return -1;
1463     }
1464
1465     ff_lockmgr_cb = cb;
1466
1467     if (ff_lockmgr_cb) {
1468         if (ff_lockmgr_cb(&codec_mutex, AV_LOCK_CREATE))
1469             return -1;
1470         if (ff_lockmgr_cb(&avformat_mutex, AV_LOCK_CREATE))
1471             return -1;
1472     }
1473     return 0;
1474 }
1475
1476 int avpriv_lock_avformat(void)
1477 {
1478     if (ff_lockmgr_cb) {
1479         if ((*ff_lockmgr_cb)(&avformat_mutex, AV_LOCK_OBTAIN))
1480             return -1;
1481     }
1482     return 0;
1483 }
1484
1485 int avpriv_unlock_avformat(void)
1486 {
1487     if (ff_lockmgr_cb) {
1488         if ((*ff_lockmgr_cb)(&avformat_mutex, AV_LOCK_RELEASE))
1489             return -1;
1490     }
1491     return 0;
1492 }
1493
1494 unsigned int avpriv_toupper4(unsigned int x)
1495 {
1496     return     toupper( x     &0xFF)
1497             + (toupper((x>>8 )&0xFF)<<8 )
1498             + (toupper((x>>16)&0xFF)<<16)
1499             + (toupper((x>>24)&0xFF)<<24);
1500 }
1501
1502 #if !HAVE_THREADS
1503
1504 int ff_thread_get_buffer(AVCodecContext *avctx, AVFrame *f)
1505 {
1506     f->owner = avctx;
1507     return avctx->get_buffer(avctx, f);
1508 }
1509
1510 void ff_thread_release_buffer(AVCodecContext *avctx, AVFrame *f)
1511 {
1512     f->owner->release_buffer(f->owner, f);
1513 }
1514
1515 void ff_thread_finish_setup(AVCodecContext *avctx)
1516 {
1517 }
1518
1519 void ff_thread_report_progress(AVFrame *f, int progress, int field)
1520 {
1521 }
1522
1523 void ff_thread_await_progress(AVFrame *f, int progress, int field)
1524 {
1525 }
1526
1527 #endif
1528
1529 #if FF_API_THREAD_INIT
1530 int avcodec_thread_init(AVCodecContext *s, int thread_count)
1531 {
1532     s->thread_count = thread_count;
1533     return ff_thread_init(s);
1534 }
1535 #endif
1536
1537 enum AVMediaType avcodec_get_type(enum CodecID codec_id)
1538 {
1539     if (codec_id <= CODEC_ID_NONE)
1540         return AVMEDIA_TYPE_UNKNOWN;
1541     else if (codec_id < CODEC_ID_FIRST_AUDIO)
1542         return AVMEDIA_TYPE_VIDEO;
1543     else if (codec_id < CODEC_ID_FIRST_SUBTITLE)
1544         return AVMEDIA_TYPE_AUDIO;
1545     else if (codec_id < CODEC_ID_FIRST_UNKNOWN)
1546         return AVMEDIA_TYPE_SUBTITLE;
1547
1548     return AVMEDIA_TYPE_UNKNOWN;
1549 }