libavcodec/avcodec.c

   1 /*
   2  * AVCodecContext functions for libavcodec
   3  *
   4  * This file is part of FFmpeg.
   5  *
   6  * FFmpeg is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * FFmpeg is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with FFmpeg; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 /**
  22  * @file
  23  * AVCodecContext functions for libavcodec
  24  */
  25
  26 #include "config.h"
  27 #include "libavutil/avassert.h"
  28 #include "libavutil/avstring.h"
  29 #include "libavutil/bprint.h"
  30 #include "libavutil/channel_layout.h"
  31 #include "libavutil/fifo.h"
  32 #include "libavutil/imgutils.h"
  33 #include "libavutil/mem.h"
  34 #include "libavutil/opt.h"
  35 #include "libavutil/thread.h"
  36 #include "avcodec.h"
  37 #include "bsf.h"
  38 #include "codec_internal.h"
  39 #include "decode.h"
  40 #include "encode.h"
  41 #include "frame_thread_encoder.h"
  42 #include "internal.h"
  43 #include "thread.h"
  44
  45 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2), void *arg, int *ret, int count, int size)
  46 {
  47     int i;
  48
  49     for (i = 0; i < count; i++) {
  50         int r = func(c, (char *)arg + i * size);
  51         if (ret)
  52             ret[i] = r;
  53     }
  54     emms_c();
  55     return 0;
  56 }
  57
  58 int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int jobnr, int threadnr), void *arg, int *ret, int count)
  59 {
  60     int i;
  61
  62     for (i = 0; i < count; i++) {
  63         int r = func(c, arg, i, 0);
  64         if (ret)
  65             ret[i] = r;
  66     }
  67     emms_c();
  68     return 0;
  69 }
  70
  71 static AVMutex codec_mutex = AV_MUTEX_INITIALIZER;
  72
  73 static void lock_avcodec(const FFCodec *codec)
  74 {
  75     if (!(codec->caps_internal & FF_CODEC_CAP_INIT_THREADSAFE) && codec->init)
  76         ff_mutex_lock(&codec_mutex);
  77 }
  78
  79 static void unlock_avcodec(const FFCodec *codec)
  80 {
  81     if (!(codec->caps_internal & FF_CODEC_CAP_INIT_THREADSAFE) && codec->init)
  82         ff_mutex_unlock(&codec_mutex);
  83 }
  84
  85 static int64_t get_bit_rate(AVCodecContext *ctx)
  86 {
  87     int64_t bit_rate;
  88     int bits_per_sample;
  89
  90     switch (ctx->codec_type) {
  91     case AVMEDIA_TYPE_VIDEO:
  92     case AVMEDIA_TYPE_DATA:
  93     case AVMEDIA_TYPE_SUBTITLE:
  94     case AVMEDIA_TYPE_ATTACHMENT:
  95         bit_rate = ctx->bit_rate;
  96         break;
  97     case AVMEDIA_TYPE_AUDIO:
  98         bits_per_sample = av_get_bits_per_sample(ctx->codec_id);
  99         if (bits_per_sample) {
 100             bit_rate = ctx->sample_rate * (int64_t)ctx->ch_layout.nb_channels;
 101             if (bit_rate > INT64_MAX / bits_per_sample) {
 102                 bit_rate = 0;
 103             } else
 104                 bit_rate *= bits_per_sample;
 105         } else
 106             bit_rate = ctx->bit_rate;
 107         break;
 108     default:
 109         bit_rate = 0;
 110         break;
 111     }
 112     return bit_rate;
 113 }
 114
 115 int attribute_align_arg avcodec_open2(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options)
 116 {
 117     int ret = 0;
 118     AVCodecInternal *avci;
 119     const FFCodec *codec2;
 120
 121     if (avcodec_is_open(avctx))
 122         return 0;
 123
 124     if (!codec && !avctx->codec) {
 125         av_log(avctx, AV_LOG_ERROR, "No codec provided to avcodec_open2()\n");
 126         return AVERROR(EINVAL);
 127     }
 128     if (codec && avctx->codec && codec != avctx->codec) {
 129         av_log(avctx, AV_LOG_ERROR, "This AVCodecContext was allocated for %s, "
 130                                     "but %s passed to avcodec_open2()\n", avctx->codec->name, codec->name);
 131         return AVERROR(EINVAL);
 132     }
 133     if (!codec)
 134         codec = avctx->codec;
 135     codec2 = ffcodec(codec);
 136
 137     if ((avctx->codec_type != AVMEDIA_TYPE_UNKNOWN && avctx->codec_type != codec->type) ||
 138         (avctx->codec_id   != AV_CODEC_ID_NONE     && avctx->codec_id   != codec->id)) {
 139         av_log(avctx, AV_LOG_ERROR, "Codec type or id mismatches\n");
 140         return AVERROR(EINVAL);
 141     }
 142
 143     avctx->codec_type = codec->type;
 144     avctx->codec_id   = codec->id;
 145     avctx->codec      = codec;
 146
 147     if (avctx->extradata_size < 0 || avctx->extradata_size >= FF_MAX_EXTRADATA_SIZE)
 148         return AVERROR(EINVAL);
 149
 150     avci = av_mallocz(sizeof(*avci));
 151     if (!avci) {
 152         ret = AVERROR(ENOMEM);
 153         goto end;
 154     }
 155     avctx->internal = avci;
 156
 157     avci->buffer_frame = av_frame_alloc();
 158     avci->buffer_pkt = av_packet_alloc();
 159     if (!avci->buffer_frame || !avci->buffer_pkt) {
 160         ret = AVERROR(ENOMEM);
 161         goto free_and_end;
 162     }
 163
 164     avci->skip_samples_multiplier = 1;
 165
 166     if (codec2->priv_data_size > 0) {
 167         if (!avctx->priv_data) {
 168             avctx->priv_data = av_mallocz(codec2->priv_data_size);
 169             if (!avctx->priv_data) {
 170                 ret = AVERROR(ENOMEM);
 171                 goto free_and_end;
 172             }
 173             if (codec->priv_class) {
 174                 *(const AVClass **)avctx->priv_data = codec->priv_class;
 175                 av_opt_set_defaults(avctx->priv_data);
 176             }
 177         }
 178         if (codec->priv_class && (ret = av_opt_set_dict(avctx->priv_data, options)) < 0)
 179             goto free_and_end;
 180     } else {
 181         avctx->priv_data = NULL;
 182     }
 183     if ((ret = av_opt_set_dict(avctx, options)) < 0)
 184         goto free_and_end;
 185
 186     if (avctx->codec_whitelist && av_match_list(codec->name, avctx->codec_whitelist, ',') <= 0) {
 187         av_log(avctx, AV_LOG_ERROR, "Codec (%s) not on whitelist \'%s\'\n", codec->name, avctx->codec_whitelist);
 188         ret = AVERROR(EINVAL);
 189         goto free_and_end;
 190     }
 191
 192     // only call ff_set_dimensions() for non H.264/VP6F/DXV codecs so as not to overwrite previously setup dimensions
 193     if (!(avctx->coded_width && avctx->coded_height && avctx->width && avctx->height &&
 194           (avctx->codec_id == AV_CODEC_ID_H264 || avctx->codec_id == AV_CODEC_ID_VP6F || avctx->codec_id == AV_CODEC_ID_DXV))) {
 195         if (avctx->coded_width && avctx->coded_height)
 196             ret = ff_set_dimensions(avctx, avctx->coded_width, avctx->coded_height);
 197         else if (avctx->width && avctx->height)
 198             ret = ff_set_dimensions(avctx, avctx->width, avctx->height);
 199         if (ret < 0)
 200             goto free_and_end;
 201     }
 202
 203     if ((avctx->coded_width || avctx->coded_height || avctx->width || avctx->height)
 204         && (  av_image_check_size2(avctx->coded_width, avctx->coded_height, avctx->max_pixels, AV_PIX_FMT_NONE, 0, avctx) < 0
 205            || av_image_check_size2(avctx->width,       avctx->height,       avctx->max_pixels, AV_PIX_FMT_NONE, 0, avctx) < 0)) {
 206         av_log(avctx, AV_LOG_WARNING, "Ignoring invalid width/height values\n");
 207         ff_set_dimensions(avctx, 0, 0);
 208     }
 209
 210     if (avctx->width > 0 && avctx->height > 0) {
 211         if (av_image_check_sar(avctx->width, avctx->height,
 212                                avctx->sample_aspect_ratio) < 0) {
 213             av_log(avctx, AV_LOG_WARNING, "ignoring invalid SAR: %u/%u\n",
 214                    avctx->sample_aspect_ratio.num,
 215                    avctx->sample_aspect_ratio.den);
 216             avctx->sample_aspect_ratio = (AVRational){ 0, 1 };
 217         }
 218     }
 219
 220     if (avctx->sample_rate < 0) {
 221         av_log(avctx, AV_LOG_ERROR, "Invalid sample rate: %d\n", avctx->sample_rate);
 222         ret = AVERROR(EINVAL);
 223         goto free_and_end;
 224     }
 225     if (avctx->block_align < 0) {
 226         av_log(avctx, AV_LOG_ERROR, "Invalid block align: %d\n", avctx->block_align);
 227         ret = AVERROR(EINVAL);
 228         goto free_and_end;
 229     }
 230
 231 #if FF_API_OLD_CHANNEL_LAYOUT
 232 FF_DISABLE_DEPRECATION_WARNINGS
 233     /* compat wrapper for old-style callers */
 234     if (avctx->channel_layout && !avctx->channels)
 235         avctx->channels = av_popcount64(avctx->channel_layout);
 236
 237     if ((avctx->channels > 0 && avctx->ch_layout.nb_channels != avctx->channels) ||
 238         (avctx->channel_layout && (avctx->ch_layout.order != AV_CHANNEL_ORDER_NATIVE ||
 239                                    avctx->ch_layout.u.mask != avctx->channel_layout))) {
 240         if (avctx->channel_layout) {
 241             av_channel_layout_from_mask(&avctx->ch_layout, avctx->channel_layout);
 242         } else {
 243             avctx->ch_layout.order       = AV_CHANNEL_ORDER_UNSPEC;
 244             avctx->ch_layout.nb_channels = avctx->channels;
 245         }
 246     }
 247 FF_ENABLE_DEPRECATION_WARNINGS
 248 #endif
 249
 250     if (avctx->ch_layout.nb_channels > FF_SANE_NB_CHANNELS) {
 251         av_log(avctx, AV_LOG_ERROR, "Too many channels: %d\n", avctx->ch_layout.nb_channels);
 252         ret = AVERROR(EINVAL);
 253         goto free_and_end;
 254     }
 255
 256     avctx->frame_number = 0;
 257     avctx->codec_descriptor = avcodec_descriptor_get(avctx->codec_id);
 258
 259     if ((avctx->codec->capabilities & AV_CODEC_CAP_EXPERIMENTAL) &&
 260         avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
 261         const char *codec_string = av_codec_is_encoder(codec) ? "encoder" : "decoder";
 262         const AVCodec *codec2;
 263         av_log(avctx, AV_LOG_ERROR,
 264                "The %s '%s' is experimental but experimental codecs are not enabled, "
 265                "add '-strict %d' if you want to use it.\n",
 266                codec_string, codec->name, FF_COMPLIANCE_EXPERIMENTAL);
 267         codec2 = av_codec_is_encoder(codec) ? avcodec_find_encoder(codec->id) : avcodec_find_decoder(codec->id);
 268         if (!(codec2->capabilities & AV_CODEC_CAP_EXPERIMENTAL))
 269             av_log(avctx, AV_LOG_ERROR, "Alternatively use the non experimental %s '%s'.\n",
 270                 codec_string, codec2->name);
 271         ret = AVERROR_EXPERIMENTAL;
 272         goto free_and_end;
 273     }
 274
 275     if (avctx->codec_type == AVMEDIA_TYPE_AUDIO &&
 276         (!avctx->time_base.num || !avctx->time_base.den)) {
 277         avctx->time_base.num = 1;
 278         avctx->time_base.den = avctx->sample_rate;
 279     }
 280
 281     if (av_codec_is_encoder(avctx->codec))
 282         ret = ff_encode_preinit(avctx);
 283     else
 284         ret = ff_decode_preinit(avctx);
 285     if (ret < 0)
 286         goto free_and_end;
 287
 288     if (CONFIG_FRAME_THREAD_ENCODER && av_codec_is_encoder(avctx->codec)) {
 289         ret = ff_frame_thread_encoder_init(avctx);
 290         if (ret < 0)
 291             goto free_and_end;
 292     }
 293
 294     if (HAVE_THREADS
 295         && !(avci->frame_thread_encoder && (avctx->active_thread_type&FF_THREAD_FRAME))) {
 296         /* Frame-threaded decoders call FFCodec.init for their child contexts. */
 297         lock_avcodec(codec2);
 298         ret = ff_thread_init(avctx);
 299         unlock_avcodec(codec2);
 300         if (ret < 0) {
 301             goto free_and_end;
 302         }
 303     }
 304     if (!HAVE_THREADS && !(codec2->caps_internal & FF_CODEC_CAP_AUTO_THREADS))
 305         avctx->thread_count = 1;
 306
 307     if (!(avctx->active_thread_type & FF_THREAD_FRAME) ||
 308         avci->frame_thread_encoder) {
 309         if (codec2->init) {
 310             lock_avcodec(codec2);
 311             ret = codec2->init(avctx);
 312             unlock_avcodec(codec2);
 313             if (ret < 0) {
 314                 avci->needs_close = codec2->caps_internal & FF_CODEC_CAP_INIT_CLEANUP;
 315                 goto free_and_end;
 316             }
 317         }
 318         avci->needs_close = 1;
 319     }
 320
 321     ret=0;
 322
 323     if (av_codec_is_decoder(avctx->codec)) {
 324         if (!avctx->bit_rate)
 325             avctx->bit_rate = get_bit_rate(avctx);
 326
 327 #if FF_API_OLD_CHANNEL_LAYOUT
 328 FF_DISABLE_DEPRECATION_WARNINGS
 329         /* update the deprecated fields for old-style callers */
 330         avctx->channels = avctx->ch_layout.nb_channels;
 331         avctx->channel_layout = avctx->ch_layout.order == AV_CHANNEL_ORDER_NATIVE ?
 332                                 avctx->ch_layout.u.mask : 0;
 333
 334         /* validate channel layout from the decoder */
 335         if (avctx->channel_layout) {
 336             int channels = av_get_channel_layout_nb_channels(avctx->channel_layout);
 337             if (!avctx->channels)
 338                 avctx->channels = channels;
 339             else if (channels != avctx->channels) {
 340                 char buf[512];
 341                 av_get_channel_layout_string(buf, sizeof(buf), -1, avctx->channel_layout);
 342                 av_log(avctx, AV_LOG_WARNING,
 343                        "Channel layout '%s' with %d channels does not match specified number of channels %d: "
 344                        "ignoring specified channel layout\n",
 345                        buf, channels, avctx->channels);
 346                 avctx->channel_layout = 0;
 347             }
 348         }
 349         if (avctx->channels && avctx->channels < 0 ||
 350             avctx->channels > FF_SANE_NB_CHANNELS) {
 351             ret = AVERROR(EINVAL);
 352             goto free_and_end;
 353         }
 354         if (avctx->bits_per_coded_sample < 0) {
 355             ret = AVERROR(EINVAL);
 356             goto free_and_end;
 357         }
 358 FF_ENABLE_DEPRECATION_WARNINGS
 359 #endif
 360
 361 #if FF_API_AVCTX_TIMEBASE
 362         if (avctx->framerate.num > 0 && avctx->framerate.den > 0)
 363             avctx->time_base = av_inv_q(av_mul_q(avctx->framerate, (AVRational){avctx->ticks_per_frame, 1}));
 364 #endif
 365     }
 366     if (codec->priv_class)
 367         av_assert0(*(const AVClass **)avctx->priv_data == codec->priv_class);
 368
 369 end:
 370
 371     return ret;
 372 free_and_end:
 373     avcodec_close(avctx);
 374     goto end;
 375 }
 376
 377 void avcodec_flush_buffers(AVCodecContext *avctx)
 378 {
 379     AVCodecInternal *avci = avctx->internal;
 380
 381     if (av_codec_is_encoder(avctx->codec)) {
 382         int caps = avctx->codec->capabilities;
 383
 384         if (!(caps & AV_CODEC_CAP_ENCODER_FLUSH)) {
 385             // Only encoders that explicitly declare support for it can be
 386             // flushed. Otherwise, this is a no-op.
 387             av_log(avctx, AV_LOG_WARNING, "Ignoring attempt to flush encoder "
 388                    "that doesn't support it\n");
 389             return;
 390         }
 391         if (avci->in_frame)
 392             av_frame_unref(avci->in_frame);
 393     } else {
 394         av_packet_unref(avci->last_pkt_props);
 395         while (av_fifo_read(avci->pkt_props, avci->last_pkt_props, 1) >= 0)
 396             av_packet_unref(avci->last_pkt_props);
 397
 398         av_packet_unref(avci->in_pkt);
 399
 400         avctx->pts_correction_last_pts =
 401         avctx->pts_correction_last_dts = INT64_MIN;
 402
 403         av_bsf_flush(avci->bsf);
 404     }
 405
 406     avci->draining      = 0;
 407     avci->draining_done = 0;
 408     avci->nb_draining_errors = 0;
 409     av_frame_unref(avci->buffer_frame);
 410     av_packet_unref(avci->buffer_pkt);
 411
 412     if (HAVE_THREADS && avctx->active_thread_type & FF_THREAD_FRAME)
 413         ff_thread_flush(avctx);
 414     else if (ffcodec(avctx->codec)->flush)
 415         ffcodec(avctx->codec)->flush(avctx);
 416 }
 417
 418 void avsubtitle_free(AVSubtitle *sub)
 419 {
 420     int i;
 421
 422     for (i = 0; i < sub->num_rects; i++) {
 423         AVSubtitleRect *const rect = sub->rects[i];
 424
 425         av_freep(&rect->data[0]);
 426         av_freep(&rect->data[1]);
 427         av_freep(&rect->data[2]);
 428         av_freep(&rect->data[3]);
 429         av_freep(&rect->text);
 430         av_freep(&rect->ass);
 431
 432         av_freep(&sub->rects[i]);
 433     }
 434
 435     av_freep(&sub->rects);
 436
 437     memset(sub, 0, sizeof(*sub));
 438 }
 439
 440 av_cold int avcodec_close(AVCodecContext *avctx)
 441 {
 442     int i;
 443
 444     if (!avctx)
 445         return 0;
 446
 447     if (avcodec_is_open(avctx)) {
 448         AVCodecInternal *avci = avctx->internal;
 449
 450         if (CONFIG_FRAME_THREAD_ENCODER &&
 451             avci->frame_thread_encoder && avctx->thread_count > 1) {
 452             ff_frame_thread_encoder_free(avctx);
 453         }
 454         if (HAVE_THREADS && avci->thread_ctx)
 455             ff_thread_free(avctx);
 456         if (avci->needs_close && ffcodec(avctx->codec)->close)
 457             ffcodec(avctx->codec)->close(avctx);
 458         avci->byte_buffer_size = 0;
 459         av_freep(&avci->byte_buffer);
 460         av_frame_free(&avci->buffer_frame);
 461         av_packet_free(&avci->buffer_pkt);
 462         if (avci->pkt_props) {
 463             while (av_fifo_can_read(avci->pkt_props)) {
 464                 av_packet_unref(avci->last_pkt_props);
 465                 av_fifo_read(avci->pkt_props, avci->last_pkt_props, 1);
 466             }
 467             av_fifo_freep2(&avci->pkt_props);
 468         }
 469         av_packet_free(&avci->last_pkt_props);
 470
 471         av_packet_free(&avci->in_pkt);
 472         av_frame_free(&avci->in_frame);
 473
 474         av_buffer_unref(&avci->pool);
 475
 476         if (avctx->hwaccel && avctx->hwaccel->uninit)
 477             avctx->hwaccel->uninit(avctx);
 478         av_freep(&avci->hwaccel_priv_data);
 479
 480         av_bsf_free(&avci->bsf);
 481
 482         av_channel_layout_uninit(&avci->initial_ch_layout);
 483
 484         av_freep(&avctx->internal);
 485     }
 486
 487     for (i = 0; i < avctx->nb_coded_side_data; i++)
 488         av_freep(&avctx->coded_side_data[i].data);
 489     av_freep(&avctx->coded_side_data);
 490     avctx->nb_coded_side_data = 0;
 491
 492     av_buffer_unref(&avctx->hw_frames_ctx);
 493     av_buffer_unref(&avctx->hw_device_ctx);
 494
 495     if (avctx->priv_data && avctx->codec && avctx->codec->priv_class)
 496         av_opt_free(avctx->priv_data);
 497     av_opt_free(avctx);
 498     av_freep(&avctx->priv_data);
 499     if (av_codec_is_encoder(avctx->codec)) {
 500         av_freep(&avctx->extradata);
 501         avctx->extradata_size = 0;
 502     } else if (av_codec_is_decoder(avctx->codec))
 503         av_freep(&avctx->subtitle_header);
 504
 505     avctx->codec = NULL;
 506     avctx->active_thread_type = 0;
 507
 508     return 0;
 509 }
 510
 511 static const char *unknown_if_null(const char *str)
 512 {
 513     return str ? str : "unknown";
 514 }
 515
 516 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
 517 {
 518     const char *codec_type;
 519     const char *codec_name;
 520     const char *profile = NULL;
 521     AVBPrint bprint;
 522     int64_t bitrate;
 523     int new_line = 0;
 524     AVRational display_aspect_ratio;
 525     const char *separator = enc->dump_separator ? (const char *)enc->dump_separator : ", ";
 526     const char *str;
 527
 528     if (!buf || buf_size <= 0)
 529         return;
 530     av_bprint_init_for_buffer(&bprint, buf, buf_size);
 531     codec_type = av_get_media_type_string(enc->codec_type);
 532     codec_name = avcodec_get_name(enc->codec_id);
 533     profile = avcodec_profile_name(enc->codec_id, enc->profile);
 534
 535     av_bprintf(&bprint, "%s: %s", codec_type ? codec_type : "unknown",
 536                codec_name);
 537     buf[0] ^= 'a' ^ 'A'; /* first letter in uppercase */
 538
 539     if (enc->codec && strcmp(enc->codec->name, codec_name))
 540         av_bprintf(&bprint, " (%s)", enc->codec->name);
 541
 542     if (profile)
 543         av_bprintf(&bprint, " (%s)", profile);
 544     if (   enc->codec_type == AVMEDIA_TYPE_VIDEO
 545         && av_log_get_level() >= AV_LOG_VERBOSE
 546         && enc->refs)
 547         av_bprintf(&bprint, ", %d reference frame%s",
 548                    enc->refs, enc->refs > 1 ? "s" : "");
 549
 550     if (enc->codec_tag)
 551         av_bprintf(&bprint, " (%s / 0x%04X)",
 552                    av_fourcc2str(enc->codec_tag), enc->codec_tag);
 553
 554     switch (enc->codec_type) {
 555     case AVMEDIA_TYPE_VIDEO:
 556         {
 557             unsigned len;
 558
 559             av_bprintf(&bprint, "%s%s", separator,
 560                        enc->pix_fmt == AV_PIX_FMT_NONE ? "none" :
 561                        unknown_if_null(av_get_pix_fmt_name(enc->pix_fmt)));
 562
 563             av_bprint_chars(&bprint, '(', 1);
 564             len = bprint.len;
 565
 566             /* The following check ensures that '(' has been written
 567              * and therefore allows us to erase it if it turns out
 568              * to be unnecessary. */
 569             if (!av_bprint_is_complete(&bprint))
 570                 return;
 571
 572             if (enc->bits_per_raw_sample && enc->pix_fmt != AV_PIX_FMT_NONE &&
 573                 enc->bits_per_raw_sample < av_pix_fmt_desc_get(enc->pix_fmt)->comp[0].depth)
 574                 av_bprintf(&bprint, "%d bpc, ", enc->bits_per_raw_sample);
 575             if (enc->color_range != AVCOL_RANGE_UNSPECIFIED &&
 576                 (str = av_color_range_name(enc->color_range)))
 577                 av_bprintf(&bprint, "%s, ", str);
 578
 579             if (enc->colorspace != AVCOL_SPC_UNSPECIFIED ||
 580                 enc->color_primaries != AVCOL_PRI_UNSPECIFIED ||
 581                 enc->color_trc != AVCOL_TRC_UNSPECIFIED) {
 582                 const char *col = unknown_if_null(av_color_space_name(enc->colorspace));
 583                 const char *pri = unknown_if_null(av_color_primaries_name(enc->color_primaries));
 584                 const char *trc = unknown_if_null(av_color_transfer_name(enc->color_trc));
 585                 if (strcmp(col, pri) || strcmp(col, trc)) {
 586                     new_line = 1;
 587                     av_bprintf(&bprint, "%s/%s/%s, ", col, pri, trc);
 588                 } else
 589                     av_bprintf(&bprint, "%s, ", col);
 590             }
 591
 592             if (enc->field_order != AV_FIELD_UNKNOWN) {
 593                 const char *field_order = "progressive";
 594                 if (enc->field_order == AV_FIELD_TT)
 595                     field_order = "top first";
 596                 else if (enc->field_order == AV_FIELD_BB)
 597                     field_order = "bottom first";
 598                 else if (enc->field_order == AV_FIELD_TB)
 599                     field_order = "top coded first (swapped)";
 600                 else if (enc->field_order == AV_FIELD_BT)
 601                     field_order = "bottom coded first (swapped)";
 602
 603                 av_bprintf(&bprint, "%s, ", field_order);
 604             }
 605
 606             if (av_log_get_level() >= AV_LOG_VERBOSE &&
 607                 enc->chroma_sample_location != AVCHROMA_LOC_UNSPECIFIED &&
 608                 (str = av_chroma_location_name(enc->chroma_sample_location)))
 609                 av_bprintf(&bprint, "%s, ", str);
 610
 611             if (len == bprint.len) {
 612                 bprint.str[len - 1] = '\0';
 613                 bprint.len--;
 614             } else {
 615                 if (bprint.len - 2 < bprint.size) {
 616                     /* Erase the last ", " */
 617                     bprint.len -= 2;
 618                     bprint.str[bprint.len] = '\0';
 619                 }
 620                 av_bprint_chars(&bprint, ')', 1);
 621             }
 622         }
 623
 624         if (enc->width) {
 625             av_bprintf(&bprint, "%s%dx%d", new_line ? separator : ", ",
 626                        enc->width, enc->height);
 627
 628             if (av_log_get_level() >= AV_LOG_VERBOSE &&
 629                 (enc->width != enc->coded_width ||
 630                  enc->height != enc->coded_height))
 631                 av_bprintf(&bprint, " (%dx%d)",
 632                            enc->coded_width, enc->coded_height);
 633
 634             if (enc->sample_aspect_ratio.num) {
 635                 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
 636                           enc->width * (int64_t)enc->sample_aspect_ratio.num,
 637                           enc->height * (int64_t)enc->sample_aspect_ratio.den,
 638                           1024 * 1024);
 639                 av_bprintf(&bprint, " [SAR %d:%d DAR %d:%d]",
 640                          enc->sample_aspect_ratio.num, enc->sample_aspect_ratio.den,
 641                          display_aspect_ratio.num, display_aspect_ratio.den);
 642             }
 643             if (av_log_get_level() >= AV_LOG_DEBUG) {
 644                 int g = av_gcd(enc->time_base.num, enc->time_base.den);
 645                 av_bprintf(&bprint, ", %d/%d",
 646                            enc->time_base.num / g, enc->time_base.den / g);
 647             }
 648         }
 649         if (encode) {
 650             av_bprintf(&bprint, ", q=%d-%d", enc->qmin, enc->qmax);
 651         } else {
 652             if (enc->properties & FF_CODEC_PROPERTY_CLOSED_CAPTIONS)
 653                 av_bprintf(&bprint, ", Closed Captions");
 654             if (enc->properties & FF_CODEC_PROPERTY_FILM_GRAIN)
 655                 av_bprintf(&bprint, ", Film Grain");
 656             if (enc->properties & FF_CODEC_PROPERTY_LOSSLESS)
 657                 av_bprintf(&bprint, ", lossless");
 658         }
 659         break;
 660     case AVMEDIA_TYPE_AUDIO:
 661         av_bprintf(&bprint, "%s", separator);
 662
 663         if (enc->sample_rate) {
 664             av_bprintf(&bprint, "%d Hz, ", enc->sample_rate);
 665         }
 666         {
 667             char buf[512];
 668             int ret = av_channel_layout_describe(&enc->ch_layout, buf, sizeof(buf));
 669             if (ret >= 0)
 670                 av_bprintf(&bprint, "%s", buf);
 671         }
 672         if (enc->sample_fmt != AV_SAMPLE_FMT_NONE &&
 673             (str = av_get_sample_fmt_name(enc->sample_fmt))) {
 674             av_bprintf(&bprint, ", %s", str);
 675         }
 676         if (   enc->bits_per_raw_sample > 0
 677             && enc->bits_per_raw_sample != av_get_bytes_per_sample(enc->sample_fmt) * 8)
 678             av_bprintf(&bprint, " (%d bit)", enc->bits_per_raw_sample);
 679         if (av_log_get_level() >= AV_LOG_VERBOSE) {
 680             if (enc->initial_padding)
 681                 av_bprintf(&bprint, ", delay %d", enc->initial_padding);
 682             if (enc->trailing_padding)
 683                 av_bprintf(&bprint, ", padding %d", enc->trailing_padding);
 684         }
 685         break;
 686     case AVMEDIA_TYPE_DATA:
 687         if (av_log_get_level() >= AV_LOG_DEBUG) {
 688             int g = av_gcd(enc->time_base.num, enc->time_base.den);
 689             if (g)
 690                 av_bprintf(&bprint, ", %d/%d",
 691                            enc->time_base.num / g, enc->time_base.den / g);
 692         }
 693         break;
 694     case AVMEDIA_TYPE_SUBTITLE:
 695         if (enc->width)
 696             av_bprintf(&bprint, ", %dx%d", enc->width, enc->height);
 697         break;
 698     default:
 699         return;
 700     }
 701     if (encode) {
 702         if (enc->flags & AV_CODEC_FLAG_PASS1)
 703             av_bprintf(&bprint, ", pass 1");
 704         if (enc->flags & AV_CODEC_FLAG_PASS2)
 705             av_bprintf(&bprint, ", pass 2");
 706     }
 707     bitrate = get_bit_rate(enc);
 708     if (bitrate != 0) {
 709         av_bprintf(&bprint, ", %"PRId64" kb/s", bitrate / 1000);
 710     } else if (enc->rc_max_rate > 0) {
 711         av_bprintf(&bprint, ", max. %"PRId64" kb/s", enc->rc_max_rate / 1000);
 712     }
 713 }
 714
 715 int avcodec_is_open(AVCodecContext *s)
 716 {
 717     return !!s->internal;
 718 }