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FFmpeg/libavcodec/utils.c

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  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 "config.h"

  29. #include "libavutil/attributes.h"

  30. #include "libavutil/avassert.h"

  31. #include "libavutil/avstring.h"

  32. #include "libavutil/channel_layout.h"

  33. #include "libavutil/crc.h"

  34. #include "libavutil/frame.h"

  35. #include "libavutil/hwcontext.h"

  36. #include "libavutil/internal.h"

  37. #include "libavutil/mathematics.h"

  38. #include "libavutil/pixdesc.h"

  39. #include "libavutil/imgutils.h"

  40. #include "libavutil/samplefmt.h"

  41. #include "libavutil/dict.h"

  42. #include "avcodec.h"

  43. #include "decode.h"

  44. #include "hwaccel.h"

  45. #include "libavutil/opt.h"

  46. #include "me_cmp.h"

  47. #include "mpegvideo.h"

  48. #include "thread.h"

  49. #include "internal.h"

  50. #include "bytestream.h"

  51. #include "version.h"

  52. #include <stdlib.h>

  53. #include <stdarg.h>

  54. #include <limits.h>

  55. #include <float.h>

  56. 

  57. static int volatile entangled_thread_counter = 0;

  58. static int (*lockmgr_cb)(void **mutex, enum AVLockOp op);

  59. static void *codec_mutex;

  60. static void *avformat_mutex;

  61. 

  62. void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size)

  63. {

  64.     void **p = ptr;

  65.     if (min_size > SIZE_MAX - AV_INPUT_BUFFER_PADDING_SIZE) {

  66.         av_freep(p);

  67.         *size = 0;

  68.         return;

  69.     }

  70.     av_fast_malloc(p, size, min_size + AV_INPUT_BUFFER_PADDING_SIZE);

  71.     if (*size)

  72.         memset((uint8_t *)*p + min_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);

  73. }

  74. 

  75. /* encoder management */

  76. static AVCodec *first_avcodec = NULL;

  77. 

  78. AVCodec *av_codec_next(const AVCodec *c)

  79. {

  80.     if (c)

  81.         return c->next;

  82.     else

  83.         return first_avcodec;

  84. }

  85. 

  86. static av_cold void avcodec_init(void)

  87. {

  88.     static int initialized = 0;

  89. 

  90.     if (initialized != 0)

  91.         return;

  92.     initialized = 1;

  93. 

  94.     if (CONFIG_ME_CMP)

  95.         ff_me_cmp_init_static();

  96. }

  97. 

  98. int av_codec_is_encoder(const AVCodec *codec)

  99. {

  100.     return codec && (codec->encode_sub || codec->encode2 ||codec->send_frame);

  101. }

  102. 

  103. int av_codec_is_decoder(const AVCodec *codec)

  104. {

  105.     return codec && (codec->decode || codec->receive_frame);

  106. }

  107. 

  108. av_cold void avcodec_register(AVCodec *codec)

  109. {

  110.     AVCodec **p;

  111.     avcodec_init();

  112.     p = &first_avcodec;

  113.     while (*p)

  114.         p = &(*p)->next;

  115.     *p          = codec;

  116.     codec->next = NULL;

  117. 

  118.     if (codec->init_static_data)

  119.         codec->init_static_data(codec);

  120. }

  121. 

  122. int ff_set_dimensions(AVCodecContext *s, int width, int height)

  123. {

  124.     int ret = av_image_check_size(width, height, 0, s);

  125. 

  126.     if (ret < 0)

  127.         width = height = 0;

  128.     s->width  = s->coded_width  = width;

  129.     s->height = s->coded_height = height;

  130. 

  131.     return ret;

  132. }

  133. 

  134. int ff_set_sar(AVCodecContext *avctx, AVRational sar)

  135. {

  136.     int ret = av_image_check_sar(avctx->width, avctx->height, sar);

  137. 

  138.     if (ret < 0) {

  139.         av_log(avctx, AV_LOG_WARNING, "ignoring invalid SAR: %d/%d\n",

  140.                sar.num, sar.den);

  141.         avctx->sample_aspect_ratio = (AVRational){ 0, 1 };

  142.         return ret;

  143.     } else {

  144.         avctx->sample_aspect_ratio = sar;

  145.     }

  146.     return 0;

  147. }

  148. 

  149. int ff_side_data_update_matrix_encoding(AVFrame *frame,

  150.                                         enum AVMatrixEncoding matrix_encoding)

  151. {

  152.     AVFrameSideData *side_data;

  153.     enum AVMatrixEncoding *data;

  154. 

  155.     side_data = av_frame_get_side_data(frame, AV_FRAME_DATA_MATRIXENCODING);

  156.     if (!side_data)

  157.         side_data = av_frame_new_side_data(frame, AV_FRAME_DATA_MATRIXENCODING,

  158.                                            sizeof(enum AVMatrixEncoding));

  159. 

  160.     if (!side_data)

  161.         return AVERROR(ENOMEM);

  162. 

  163.     data  = (enum AVMatrixEncoding*)side_data->data;

  164.     *data = matrix_encoding;

  165. 

  166.     return 0;

  167. }

  168. 

  169. void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,

  170.                                int linesize_align[AV_NUM_DATA_POINTERS])

  171. {

  172.     size_t max_align = av_cpu_max_align();

  173.     int i;

  174.     int w_align = 1;

  175.     int h_align = 1;

  176. 

  177.     switch (s->pix_fmt) {

  178.     case AV_PIX_FMT_YUV420P:

  179.     case AV_PIX_FMT_YUYV422:

  180.     case AV_PIX_FMT_YVYU422:

  181.     case AV_PIX_FMT_UYVY422:

  182.     case AV_PIX_FMT_YUV422P:

  183.     case AV_PIX_FMT_YUV440P:

  184.     case AV_PIX_FMT_YUV444P:

  185.     case AV_PIX_FMT_GBRP:

  186.     case AV_PIX_FMT_GBRAP:

  187.     case AV_PIX_FMT_GRAY8:

  188.     case AV_PIX_FMT_GRAY16BE:

  189.     case AV_PIX_FMT_GRAY16LE:

  190.     case AV_PIX_FMT_YUVJ420P:

  191.     case AV_PIX_FMT_YUVJ422P:

  192.     case AV_PIX_FMT_YUVJ440P:

  193.     case AV_PIX_FMT_YUVJ444P:

  194.     case AV_PIX_FMT_YUVA420P:

  195.     case AV_PIX_FMT_YUVA422P:

  196.     case AV_PIX_FMT_YUVA444P:

  197.     case AV_PIX_FMT_YUV420P9LE:

  198.     case AV_PIX_FMT_YUV420P9BE:

  199.     case AV_PIX_FMT_YUV420P10LE:

  200.     case AV_PIX_FMT_YUV420P10BE:

  201.     case AV_PIX_FMT_YUV422P9LE:

  202.     case AV_PIX_FMT_YUV422P9BE:

  203.     case AV_PIX_FMT_YUV422P10LE:

  204.     case AV_PIX_FMT_YUV422P10BE:

  205.     case AV_PIX_FMT_YUVA422P10LE:

  206.     case AV_PIX_FMT_YUVA422P10BE:

  207.     case AV_PIX_FMT_YUV444P9LE:

  208.     case AV_PIX_FMT_YUV444P9BE:

  209.     case AV_PIX_FMT_YUV444P10LE:

  210.     case AV_PIX_FMT_YUV444P10BE:

  211.     case AV_PIX_FMT_YUVA444P10LE:

  212.     case AV_PIX_FMT_YUVA444P10BE:

  213.     case AV_PIX_FMT_GBRP9LE:

  214.     case AV_PIX_FMT_GBRP9BE:

  215.     case AV_PIX_FMT_GBRP10LE:

  216.     case AV_PIX_FMT_GBRP10BE:

  217.     case AV_PIX_FMT_GBRAP12LE:

  218.     case AV_PIX_FMT_GBRAP12BE:

  219.         w_align = 16; //FIXME assume 16 pixel per macroblock

  220.         h_align = 16 * 2; // interlaced needs 2 macroblocks height

  221.         break;

  222.     case AV_PIX_FMT_YUV411P:

  223.     case AV_PIX_FMT_UYYVYY411:

  224.         w_align = 32;

  225.         h_align = 8;

  226.         break;

  227.     case AV_PIX_FMT_YUV410P:

  228.         if (s->codec_id == AV_CODEC_ID_SVQ1) {

  229.             w_align = 64;

  230.             h_align = 64;

  231.         }

  232.     case AV_PIX_FMT_RGB555:

  233.         if (s->codec_id == AV_CODEC_ID_RPZA) {

  234.             w_align = 4;

  235.             h_align = 4;

  236.         }

  237.     case AV_PIX_FMT_PAL8:

  238.     case AV_PIX_FMT_BGR8:

  239.     case AV_PIX_FMT_RGB8:

  240.         if (s->codec_id == AV_CODEC_ID_SMC) {

  241.             w_align = 4;

  242.             h_align = 4;

  243.         }

  244.         break;

  245.     case AV_PIX_FMT_BGR24:

  246.         if ((s->codec_id == AV_CODEC_ID_MSZH) ||

  247.             (s->codec_id == AV_CODEC_ID_ZLIB)) {

  248.             w_align = 4;

  249.             h_align = 4;

  250.         }

  251.         break;

  252.     default:

  253.         w_align = 1;

  254.         h_align = 1;

  255.         break;

  256.     }

  257. 

  258.     *width  = FFALIGN(*width, w_align);

  259.     *height = FFALIGN(*height, h_align);

  260.     if (s->codec_id == AV_CODEC_ID_H264)

  261.         // some of the optimized chroma MC reads one line too much

  262.         *height += 2;

  263. 

  264.     for (i = 0; i < 4; i++)

  265.         linesize_align[i] = max_align;

  266. }

  267. 

  268. void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height)

  269. {

  270.     const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(s->pix_fmt);

  271.     int chroma_shift = desc->log2_chroma_w;

  272.     int linesize_align[AV_NUM_DATA_POINTERS];

  273.     int align;

  274. 

  275.     avcodec_align_dimensions2(s, width, height, linesize_align);

  276.     align               = FFMAX(linesize_align[0], linesize_align[3]);

  277.     linesize_align[1] <<= chroma_shift;

  278.     linesize_align[2] <<= chroma_shift;

  279.     align               = FFMAX3(align, linesize_align[1], linesize_align[2]);

  280.     *width              = FFALIGN(*width, align);

  281. }

  282. 

  283. int avcodec_fill_audio_frame(AVFrame *frame, int nb_channels,

  284.                              enum AVSampleFormat sample_fmt, const uint8_t *buf,

  285.                              int buf_size, int align)

  286. {

  287.     int ch, planar, needed_size, ret = 0;

  288. 

  289.     needed_size = av_samples_get_buffer_size(NULL, nb_channels,

  290.                                              frame->nb_samples, sample_fmt,

  291.                                              align);

  292.     if (buf_size < needed_size)

  293.         return AVERROR(EINVAL);

  294. 

  295.     planar = av_sample_fmt_is_planar(sample_fmt);

  296.     if (planar && nb_channels > AV_NUM_DATA_POINTERS) {

  297.         if (!(frame->extended_data = av_mallocz(nb_channels *

  298.                                                 sizeof(*frame->extended_data))))

  299.             return AVERROR(ENOMEM);

  300.     } else {

  301.         frame->extended_data = frame->data;

  302.     }

  303. 

  304.     if ((ret = av_samples_fill_arrays(frame->extended_data, &frame->linesize[0],

  305.                                       buf, nb_channels, frame->nb_samples,

  306.                                       sample_fmt, align)) < 0) {

  307.         if (frame->extended_data != frame->data)

  308.             av_free(frame->extended_data);

  309.         return ret;

  310.     }

  311.     if (frame->extended_data != frame->data) {

  312.         for (ch = 0; ch < AV_NUM_DATA_POINTERS; ch++)

  313.             frame->data[ch] = frame->extended_data[ch];

  314.     }

  315. 

  316.     return ret;

  317. }

  318. 

  319. int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2), void *arg, int *ret, int count, int size)

  320. {

  321.     int i;

  322. 

  323.     for (i = 0; i < count; i++) {

  324.         int r = func(c, (char *)arg + i * size);

  325.         if (ret)

  326.             ret[i] = r;

  327.     }

  328.     return 0;

  329. }

  330. 

  331. int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int jobnr, int threadnr), void *arg, int *ret, int count)

  332. {

  333.     int i;

  334. 

  335.     for (i = 0; i < count; i++) {

  336.         int r = func(c, arg, i, 0);

  337.         if (ret)

  338.             ret[i] = r;

  339.     }

  340.     return 0;

  341. }

  342. 

  343. int attribute_align_arg avcodec_open2(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options)

  344. {

  345.     int ret = 0;

  346.     AVDictionary *tmp = NULL;

  347. 

  348.     if (avcodec_is_open(avctx))

  349.         return 0;

  350. 

  351.     if ((!codec && !avctx->codec)) {

  352.         av_log(avctx, AV_LOG_ERROR, "No codec provided to avcodec_open2().\n");

  353.         return AVERROR(EINVAL);

  354.     }

  355.     if ((codec && avctx->codec && codec != avctx->codec)) {

  356.         av_log(avctx, AV_LOG_ERROR, "This AVCodecContext was allocated for %s, "

  357.                                     "but %s passed to avcodec_open2().\n", avctx->codec->name, codec->name);

  358.         return AVERROR(EINVAL);

  359.     }

  360.     if (!codec)

  361.         codec = avctx->codec;

  362. 

  363.     if (avctx->extradata_size < 0 || avctx->extradata_size >= FF_MAX_EXTRADATA_SIZE)

  364.         return AVERROR(EINVAL);

  365. 

  366.     if (options)

  367.         av_dict_copy(&tmp, *options, 0);

  368. 

  369.     /* If there is a user-supplied mutex locking routine, call it. */

  370.     if (!(codec->caps_internal & FF_CODEC_CAP_INIT_THREADSAFE) && codec->init) {

  371.         if (lockmgr_cb) {

  372.             if ((*lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))

  373.                 return -1;

  374.         }

  375. 

  376.         entangled_thread_counter++;

  377.         if (entangled_thread_counter != 1) {

  378.             av_log(avctx, AV_LOG_ERROR,

  379.                    "Insufficient thread locking. At least %d threads are "

  380.                    "calling avcodec_open2() at the same time right now.\n",

  381.                    entangled_thread_counter);

  382.             ret = -1;

  383.             goto end;

  384.         }

  385.     }

  386. 

  387.     avctx->internal = av_mallocz(sizeof(AVCodecInternal));

  388.     if (!avctx->internal) {

  389.         ret = AVERROR(ENOMEM);

  390.         goto end;

  391.     }

  392. 

  393.     avctx->internal->pool = av_mallocz(sizeof(*avctx->internal->pool));

  394.     if (!avctx->internal->pool) {

  395.         ret = AVERROR(ENOMEM);

  396.         goto free_and_end;

  397.     }

  398. 

  399.     avctx->internal->to_free = av_frame_alloc();

  400.     if (!avctx->internal->to_free) {

  401.         ret = AVERROR(ENOMEM);

  402.         goto free_and_end;

  403.     }

  404. 

  405.     avctx->internal->compat_decode_frame = av_frame_alloc();

  406.     if (!avctx->internal->compat_decode_frame) {

  407.         ret = AVERROR(ENOMEM);

  408.         goto free_and_end;

  409.     }

  410. 

  411.     avctx->internal->buffer_frame = av_frame_alloc();

  412.     if (!avctx->internal->buffer_frame) {

  413.         ret = AVERROR(ENOMEM);

  414.         goto free_and_end;

  415.     }

  416. 

  417.     avctx->internal->buffer_pkt = av_packet_alloc();

  418.     if (!avctx->internal->buffer_pkt) {

  419.         ret = AVERROR(ENOMEM);

  420.         goto free_and_end;

  421.     }

  422. 

  423.     avctx->internal->ds.in_pkt = av_packet_alloc();

  424.     if (!avctx->internal->ds.in_pkt) {

  425.         ret = AVERROR(ENOMEM);

  426.         goto free_and_end;

  427.     }

  428. 

  429.     avctx->internal->last_pkt_props = av_packet_alloc();

  430.     if (!avctx->internal->last_pkt_props) {

  431.         ret = AVERROR(ENOMEM);

  432.         goto free_and_end;

  433.     }

  434. 

  435.     if (codec->priv_data_size > 0) {

  436.         if (!avctx->priv_data) {

  437.             avctx->priv_data = av_mallocz(codec->priv_data_size);

  438.             if (!avctx->priv_data) {

  439.                 ret = AVERROR(ENOMEM);

  440.                 goto end;

  441.             }

  442.             if (codec->priv_class) {

  443.                 *(const AVClass **)avctx->priv_data = codec->priv_class;

  444.                 av_opt_set_defaults(avctx->priv_data);

  445.             }

  446.         }

  447.         if (codec->priv_class && (ret = av_opt_set_dict(avctx->priv_data, &tmp)) < 0)

  448.             goto free_and_end;

  449.     } else {

  450.         avctx->priv_data = NULL;

  451.     }

  452.     if ((ret = av_opt_set_dict(avctx, &tmp)) < 0)

  453.         goto free_and_end;

  454. 

  455.     if (avctx->coded_width && avctx->coded_height && !avctx->width && !avctx->height)

  456.         ret = ff_set_dimensions(avctx, avctx->coded_width, avctx->coded_height);

  457.     else if (avctx->width && avctx->height)

  458.         ret = ff_set_dimensions(avctx, avctx->width, avctx->height);

  459.     if (ret < 0)

  460.         goto free_and_end;

  461. 

  462.     if ((avctx->coded_width || avctx->coded_height || avctx->width || avctx->height)

  463.         && (  av_image_check_size(avctx->coded_width, avctx->coded_height, 0, avctx) < 0

  464.            || av_image_check_size(avctx->width,       avctx->height,       0, avctx) < 0)) {

  465.         av_log(avctx, AV_LOG_WARNING, "ignoring invalid width/height values\n");

  466.         ff_set_dimensions(avctx, 0, 0);

  467.     }

  468. 

  469.     if (avctx->width > 0 && avctx->height > 0) {

  470.         if (av_image_check_sar(avctx->width, avctx->height,

  471.                                avctx->sample_aspect_ratio) < 0) {

  472.             av_log(avctx, AV_LOG_WARNING, "ignoring invalid SAR: %u/%u\n",

  473.                    avctx->sample_aspect_ratio.num,

  474.                    avctx->sample_aspect_ratio.den);

  475.             avctx->sample_aspect_ratio = (AVRational){ 0, 1 };

  476.         }

  477.     }

  478. 

  479.     /* if the decoder init function was already called previously,

  480.      * free the already allocated subtitle_header before overwriting it */

  481.     if (av_codec_is_decoder(codec))

  482.         av_freep(&avctx->subtitle_header);

  483. 

  484.     if (avctx->channels > FF_SANE_NB_CHANNELS) {

  485.         ret = AVERROR(EINVAL);

  486.         goto free_and_end;

  487.     }

  488. 

  489.     avctx->codec = codec;

  490.     if ((avctx->codec_type == AVMEDIA_TYPE_UNKNOWN || avctx->codec_type == codec->type) &&

  491.         avctx->codec_id == AV_CODEC_ID_NONE) {

  492.         avctx->codec_type = codec->type;

  493.         avctx->codec_id   = codec->id;

  494.     }

  495.     if (avctx->codec_id != codec->id || (avctx->codec_type != codec->type

  496.                                          && avctx->codec_type != AVMEDIA_TYPE_ATTACHMENT)) {

  497.         av_log(avctx, AV_LOG_ERROR, "codec type or id mismatches\n");

  498.         ret = AVERROR(EINVAL);

  499.         goto free_and_end;

  500.     }

  501.     avctx->frame_number = 0;

  502. 

  503.     if ((avctx->codec->capabilities & AV_CODEC_CAP_EXPERIMENTAL) &&

  504.         avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {

  505.         ret = AVERROR_EXPERIMENTAL;

  506.         goto free_and_end;

  507.     }

  508. 

  509.     if (avctx->codec_type == AVMEDIA_TYPE_AUDIO &&

  510.         (!avctx->time_base.num || !avctx->time_base.den)) {

  511.         avctx->time_base.num = 1;

  512.         avctx->time_base.den = avctx->sample_rate;

  513.     }

  514. 

  515.     if (HAVE_THREADS) {

  516.         ret = ff_thread_init(avctx);

  517.         if (ret < 0) {

  518.             goto free_and_end;

  519.         }

  520.     }

  521.     if (!HAVE_THREADS && !(codec->capabilities & AV_CODEC_CAP_AUTO_THREADS))

  522.         avctx->thread_count = 1;

  523. 

  524.     if (av_codec_is_encoder(avctx->codec)) {

  525.         int i;

  526. #if FF_API_CODED_FRAME

  527. FF_DISABLE_DEPRECATION_WARNINGS

  528.         avctx->coded_frame = av_frame_alloc();

  529.         if (!avctx->coded_frame) {

  530.             ret = AVERROR(ENOMEM);

  531.             goto free_and_end;

  532.         }

  533. FF_ENABLE_DEPRECATION_WARNINGS

  534. #endif

  535. 

  536.         if (avctx->time_base.num <= 0 || avctx->time_base.den <= 0) {

  537.             av_log(avctx, AV_LOG_ERROR, "The encoder timebase is not set.\n");

  538.             ret = AVERROR(EINVAL);

  539.             goto free_and_end;

  540.         }

  541. 

  542.         if (avctx->codec->sample_fmts) {

  543.             for (i = 0; avctx->codec->sample_fmts[i] != AV_SAMPLE_FMT_NONE; i++) {

  544.                 if (avctx->sample_fmt == avctx->codec->sample_fmts[i])

  545.                     break;

  546.                 if (avctx->channels == 1 &&

  547.                     av_get_planar_sample_fmt(avctx->sample_fmt) ==

  548.                     av_get_planar_sample_fmt(avctx->codec->sample_fmts[i])) {

  549.                     avctx->sample_fmt = avctx->codec->sample_fmts[i];

  550.                     break;

  551.                 }

  552.             }

  553.             if (avctx->codec->sample_fmts[i] == AV_SAMPLE_FMT_NONE) {

  554.                 av_log(avctx, AV_LOG_ERROR, "Specified sample_fmt is not supported.\n");

  555.                 ret = AVERROR(EINVAL);

  556.                 goto free_and_end;

  557.             }

  558.         }

  559.         if (avctx->codec->pix_fmts) {

  560.             for (i = 0; avctx->codec->pix_fmts[i] != AV_PIX_FMT_NONE; i++)

  561.                 if (avctx->pix_fmt == avctx->codec->pix_fmts[i])

  562.                     break;

  563.             if (avctx->codec->pix_fmts[i] == AV_PIX_FMT_NONE) {

  564.                 av_log(avctx, AV_LOG_ERROR, "Specified pix_fmt is not supported\n");

  565.                 ret = AVERROR(EINVAL);

  566.                 goto free_and_end;

  567.             }

  568.             if (avctx->codec->pix_fmts[i] == AV_PIX_FMT_YUVJ420P ||

  569.                 avctx->codec->pix_fmts[i] == AV_PIX_FMT_YUVJ422P ||

  570.                 avctx->codec->pix_fmts[i] == AV_PIX_FMT_YUVJ440P ||

  571.                 avctx->codec->pix_fmts[i] == AV_PIX_FMT_YUVJ444P)

  572.                 avctx->color_range = AVCOL_RANGE_JPEG;

  573.         }

  574.         if (avctx->codec->supported_samplerates) {

  575.             for (i = 0; avctx->codec->supported_samplerates[i] != 0; i++)

  576.                 if (avctx->sample_rate == avctx->codec->supported_samplerates[i])

  577.                     break;

  578.             if (avctx->codec->supported_samplerates[i] == 0) {

  579.                 av_log(avctx, AV_LOG_ERROR, "Specified sample_rate is not supported\n");

  580.                 ret = AVERROR(EINVAL);

  581.                 goto free_and_end;

  582.             }

  583.         }

  584.         if (avctx->codec->channel_layouts) {

  585.             if (!avctx->channel_layout) {

  586.                 av_log(avctx, AV_LOG_WARNING, "channel_layout not specified\n");

  587.             } else {

  588.                 for (i = 0; avctx->codec->channel_layouts[i] != 0; i++)

  589.                     if (avctx->channel_layout == avctx->codec->channel_layouts[i])

  590.                         break;

  591.                 if (avctx->codec->channel_layouts[i] == 0) {

  592.                     av_log(avctx, AV_LOG_ERROR, "Specified channel_layout is not supported\n");

  593.                     ret = AVERROR(EINVAL);

  594.                     goto free_and_end;

  595.                 }

  596.             }

  597.         }

  598.         if (avctx->channel_layout && avctx->channels) {

  599.             if (av_get_channel_layout_nb_channels(avctx->channel_layout) != avctx->channels) {

  600.                 av_log(avctx, AV_LOG_ERROR, "channel layout does not match number of channels\n");

  601.                 ret = AVERROR(EINVAL);

  602.                 goto free_and_end;

  603.             }

  604.         } else if (avctx->channel_layout) {

  605.             avctx->channels = av_get_channel_layout_nb_channels(avctx->channel_layout);

  606.         }

  607. 

  608.         if (!avctx->rc_initial_buffer_occupancy)

  609.             avctx->rc_initial_buffer_occupancy = avctx->rc_buffer_size * 3 / 4;

  610. 

  611.         if (avctx->ticks_per_frame &&

  612.             avctx->ticks_per_frame > INT_MAX / avctx->time_base.num) {

  613.             av_log(avctx, AV_LOG_ERROR,

  614.                    "ticks_per_frame %d too large for the timebase %d/%d.",

  615.                    avctx->ticks_per_frame,

  616.                    avctx->time_base.num,

  617.                    avctx->time_base.den);

  618.             goto free_and_end;

  619.         }

  620. 

  621.         if (avctx->hw_frames_ctx) {

  622.             AVHWFramesContext *frames_ctx = (AVHWFramesContext*)avctx->hw_frames_ctx->data;

  623.             if (frames_ctx->format != avctx->pix_fmt) {

  624.                 av_log(avctx, AV_LOG_ERROR,

  625.                        "Mismatching AVCodecContext.pix_fmt and AVHWFramesContext.format\n");

  626.                 ret = AVERROR(EINVAL);

  627.                 goto free_and_end;

  628.             }

  629.             if (avctx->sw_pix_fmt != AV_PIX_FMT_NONE &&

  630.                 avctx->sw_pix_fmt != frames_ctx->sw_format) {

  631.                 av_log(avctx, AV_LOG_ERROR,

  632.                        "Mismatching AVCodecContext.sw_pix_fmt (%s) "

  633.                        "and AVHWFramesContext.sw_format (%s)\n",

  634.                        av_get_pix_fmt_name(avctx->sw_pix_fmt),

  635.                        av_get_pix_fmt_name(frames_ctx->sw_format));

  636.                 ret = AVERROR(EINVAL);

  637.                 goto free_and_end;

  638.             }

  639.             avctx->sw_pix_fmt = frames_ctx->sw_format;

  640.         }

  641.     }

  642. 

  643.     if (avctx->codec->init && !(avctx->active_thread_type & FF_THREAD_FRAME)) {

  644.         ret = avctx->codec->init(avctx);

  645.         if (ret < 0) {

  646.             goto free_and_end;

  647.         }

  648.     }

  649. 

  650.     if (av_codec_is_decoder(avctx->codec)) {

  651.         /* validate channel layout from the decoder */

  652.         if (avctx->channel_layout) {

  653.             int channels = av_get_channel_layout_nb_channels(avctx->channel_layout);

  654.             if (!avctx->channels)

  655.                 avctx->channels = channels;

  656.             else if (channels != avctx->channels) {

  657.                 av_log(avctx, AV_LOG_WARNING,

  658.                        "channel layout does not match number of channels\n");

  659.                 avctx->channel_layout = 0;

  660.             }

  661.         }

  662.         if (avctx->channels && avctx->channels < 0 ||

  663.             avctx->channels > FF_SANE_NB_CHANNELS) {

  664.             ret = AVERROR(EINVAL);

  665.             goto free_and_end;

  666.         }

  667.     }

  668. end:

  669.     if (!(codec->caps_internal & FF_CODEC_CAP_INIT_THREADSAFE) && codec->init) {

  670.         entangled_thread_counter--;

  671. 

  672.         /* Release any user-supplied mutex. */

  673.         if (lockmgr_cb) {

  674.             (*lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);

  675.         }

  676.     }

  677. 

  678.     if (options) {

  679.         av_dict_free(options);

  680.         *options = tmp;

  681.     }

  682. 

  683.     return ret;

  684. free_and_end:

  685.     if (avctx->codec &&

  686.         (avctx->codec->caps_internal & FF_CODEC_CAP_INIT_CLEANUP))

  687.         avctx->codec->close(avctx);

  688. 

  689.     if (avctx->priv_data && avctx->codec && avctx->codec->priv_class)

  690.         av_opt_free(avctx->priv_data);

  691.     av_opt_free(avctx);

  692. 

  693. #if FF_API_CODED_FRAME

  694. FF_DISABLE_DEPRECATION_WARNINGS

  695.     av_frame_free(&avctx->coded_frame);

  696. FF_ENABLE_DEPRECATION_WARNINGS

  697. #endif

  698. 

  699.     av_dict_free(&tmp);

  700.     av_freep(&avctx->priv_data);

  701.     if (avctx->internal) {

  702.         av_frame_free(&avctx->internal->to_free);

  703.         av_frame_free(&avctx->internal->compat_decode_frame);

  704.         av_frame_free(&avctx->internal->buffer_frame);

  705.         av_packet_free(&avctx->internal->buffer_pkt);

  706.         av_packet_free(&avctx->internal->last_pkt_props);

  707. 

  708.         av_packet_free(&avctx->internal->ds.in_pkt);

  709. 

  710.         av_freep(&avctx->internal->pool);

  711.     }

  712.     av_freep(&avctx->internal);

  713.     avctx->codec = NULL;

  714.     goto end;

  715. }

  716. 

  717. void avsubtitle_free(AVSubtitle *sub)

  718. {

  719.     int i;

  720. 

  721.     for (i = 0; i < sub->num_rects; i++) {

  722.         av_freep(&sub->rects[i]->data[0]);

  723.         av_freep(&sub->rects[i]->data[1]);

  724.         av_freep(&sub->rects[i]->data[2]);

  725.         av_freep(&sub->rects[i]->data[3]);

  726.         av_freep(&sub->rects[i]->text);

  727.         av_freep(&sub->rects[i]->ass);

  728.         av_freep(&sub->rects[i]);

  729.     }

  730. 

  731.     av_freep(&sub->rects);

  732. 

  733.     memset(sub, 0, sizeof(AVSubtitle));

  734. }

  735. 

  736. av_cold int avcodec_close(AVCodecContext *avctx)

  737. {

  738.     int i;

  739. 

  740.     if (avcodec_is_open(avctx)) {

  741.         FramePool *pool = avctx->internal->pool;

  742. 

  743.         if (HAVE_THREADS && avctx->internal->thread_ctx)

  744.             ff_thread_free(avctx);

  745.         if (avctx->codec && avctx->codec->close)

  746.             avctx->codec->close(avctx);

  747.         av_frame_free(&avctx->internal->to_free);

  748.         av_frame_free(&avctx->internal->compat_decode_frame);

  749.         av_frame_free(&avctx->internal->buffer_frame);

  750.         av_packet_free(&avctx->internal->buffer_pkt);

  751.         av_packet_free(&avctx->internal->last_pkt_props);

  752. 

  753.         av_packet_free(&avctx->internal->ds.in_pkt);

  754. 

  755.         for (i = 0; i < FF_ARRAY_ELEMS(pool->pools); i++)

  756.             av_buffer_pool_uninit(&pool->pools[i]);

  757.         av_freep(&avctx->internal->pool);

  758. 

  759.         if (avctx->hwaccel && avctx->hwaccel->uninit)

  760.             avctx->hwaccel->uninit(avctx);

  761.         av_freep(&avctx->internal->hwaccel_priv_data);

  762. 

  763.         ff_decode_bsfs_uninit(avctx);

  764. 

  765.         av_freep(&avctx->internal);

  766.     }

  767. 

  768.     for (i = 0; i < avctx->nb_coded_side_data; i++)

  769.         av_freep(&avctx->coded_side_data[i].data);

  770.     av_freep(&avctx->coded_side_data);

  771.     avctx->nb_coded_side_data = 0;

  772. 

  773.     av_buffer_unref(&avctx->hw_frames_ctx);

  774.     av_buffer_unref(&avctx->hw_device_ctx);

  775. 

  776.     if (avctx->priv_data && avctx->codec && avctx->codec->priv_class)

  777.         av_opt_free(avctx->priv_data);

  778.     av_opt_free(avctx);

  779.     av_freep(&avctx->priv_data);

  780.     if (av_codec_is_encoder(avctx->codec)) {

  781.         av_freep(&avctx->extradata);

  782. #if FF_API_CODED_FRAME

  783. FF_DISABLE_DEPRECATION_WARNINGS

  784.         av_frame_free(&avctx->coded_frame);

  785. FF_ENABLE_DEPRECATION_WARNINGS

  786. #endif

  787.     }

  788.     avctx->codec = NULL;

  789.     avctx->active_thread_type = 0;

  790. 

  791.     return 0;

  792. }

  793. 

  794. static AVCodec *find_encdec(enum AVCodecID id, int encoder)

  795. {

  796.     AVCodec *p, *experimental = NULL;

  797.     p = first_avcodec;

  798.     while (p) {

  799.         if ((encoder ? av_codec_is_encoder(p) : av_codec_is_decoder(p)) &&

  800.             p->id == id) {

  801.             if (p->capabilities & AV_CODEC_CAP_EXPERIMENTAL && !experimental) {

  802.                 experimental = p;

  803.             } else

  804.                 return p;

  805.         }

  806.         p = p->next;

  807.     }

  808.     return experimental;

  809. }

  810. 

  811. AVCodec *avcodec_find_encoder(enum AVCodecID id)

  812. {

  813.     return find_encdec(id, 1);

  814. }

  815. 

  816. AVCodec *avcodec_find_encoder_by_name(const char *name)

  817. {

  818.     AVCodec *p;

  819.     if (!name)

  820.         return NULL;

  821.     p = first_avcodec;

  822.     while (p) {

  823.         if (av_codec_is_encoder(p) && strcmp(name, p->name) == 0)

  824.             return p;

  825.         p = p->next;

  826.     }

  827.     return NULL;

  828. }

  829. 

  830. AVCodec *avcodec_find_decoder(enum AVCodecID id)

  831. {

  832.     return find_encdec(id, 0);

  833. }

  834. 

  835. AVCodec *avcodec_find_decoder_by_name(const char *name)

  836. {

  837.     AVCodec *p;

  838.     if (!name)

  839.         return NULL;

  840.     p = first_avcodec;

  841.     while (p) {

  842.         if (av_codec_is_decoder(p) && strcmp(name, p->name) == 0)

  843.             return p;

  844.         p = p->next;

  845.     }

  846.     return NULL;

  847. }

  848. 

  849. static int get_bit_rate(AVCodecContext *ctx)

  850. {

  851.     int bit_rate;

  852.     int bits_per_sample;

  853. 

  854.     switch (ctx->codec_type) {

  855.     case AVMEDIA_TYPE_VIDEO:

  856.     case AVMEDIA_TYPE_DATA:

  857.     case AVMEDIA_TYPE_SUBTITLE:

  858.     case AVMEDIA_TYPE_ATTACHMENT:

  859.         bit_rate = ctx->bit_rate;

  860.         break;

  861.     case AVMEDIA_TYPE_AUDIO:

  862.         bits_per_sample = av_get_bits_per_sample(ctx->codec_id);

  863.         bit_rate = bits_per_sample ? ctx->sample_rate * ctx->channels * bits_per_sample : ctx->bit_rate;

  864.         break;

  865.     default:

  866.         bit_rate = 0;

  867.         break;

  868.     }

  869.     return bit_rate;

  870. }

  871. 

  872. size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag)

  873. {

  874.     int i, len, ret = 0;

  875. 

  876. #define TAG_PRINT(x)                                              \

  877.     (((x) >= '0' && (x) <= '9') ||                                \

  878.      ((x) >= 'a' && (x) <= 'z') || ((x) >= 'A' && (x) <= 'Z') ||  \

  879.      ((x) == '.' || (x) == ' '))

  880. 

  881.     for (i = 0; i < 4; i++) {

  882.         len = snprintf(buf, buf_size,

  883.                        TAG_PRINT(codec_tag & 0xFF) ? "%c" : "[%d]", codec_tag & 0xFF);

  884.         buf        += len;

  885.         buf_size    = buf_size > len ? buf_size - len : 0;

  886.         ret        += len;

  887.         codec_tag >>= 8;

  888.     }

  889.     return ret;

  890. }

  891. 

  892. void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)

  893. {

  894.     const char *codec_name;

  895.     const char *profile = NULL;

  896.     char buf1[32];

  897.     int bitrate;

  898.     int new_line = 0;

  899.     AVRational display_aspect_ratio;

  900.     const AVCodecDescriptor *desc = avcodec_descriptor_get(enc->codec_id);

  901. 

  902.     if (desc) {

  903.         codec_name = desc->name;

  904.         profile = avcodec_profile_name(enc->codec_id, enc->profile);

  905.     } else if (enc->codec_id == AV_CODEC_ID_MPEG2TS) {

  906.         /* fake mpeg2 transport stream codec (currently not

  907.          * registered) */

  908.         codec_name = "mpeg2ts";

  909.     } else {

  910.         /* output avi tags */

  911.         char tag_buf[32];

  912.         av_get_codec_tag_string(tag_buf, sizeof(tag_buf), enc->codec_tag);

  913.         snprintf(buf1, sizeof(buf1), "%s / 0x%04X", tag_buf, enc->codec_tag);

  914.         codec_name = buf1;

  915.     }

  916. 

  917.     switch (enc->codec_type) {

  918.     case AVMEDIA_TYPE_VIDEO:

  919.         snprintf(buf, buf_size,

  920.                  "Video: %s%s",

  921.                  codec_name, enc->mb_decision ? " (hq)" : "");

  922.         if (profile)

  923.             snprintf(buf + strlen(buf), buf_size - strlen(buf),

  924.                      " (%s)", profile);

  925.         if (enc->codec_tag) {

  926.             char tag_buf[32];

  927.             av_get_codec_tag_string(tag_buf, sizeof(tag_buf), enc->codec_tag);

  928.             snprintf(buf + strlen(buf), buf_size - strlen(buf),

  929.                      " [%s / 0x%04X]", tag_buf, enc->codec_tag);

  930.         }

  931. 

  932.         av_strlcat(buf, "\n      ", buf_size);

  933.         snprintf(buf + strlen(buf), buf_size - strlen(buf),

  934.                  "%s", enc->pix_fmt == AV_PIX_FMT_NONE ? "none" :

  935.                      av_get_pix_fmt_name(enc->pix_fmt));

  936. 

  937.         if (enc->color_range != AVCOL_RANGE_UNSPECIFIED)

  938.             snprintf(buf + strlen(buf), buf_size - strlen(buf), ", %s",

  939.                      av_color_range_name(enc->color_range));

  940.         if (enc->colorspace != AVCOL_SPC_UNSPECIFIED ||

  941.             enc->color_primaries != AVCOL_PRI_UNSPECIFIED ||

  942.             enc->color_trc != AVCOL_TRC_UNSPECIFIED) {

  943.             new_line = 1;

  944.             snprintf(buf + strlen(buf), buf_size - strlen(buf), ", %s/%s/%s",

  945.                      av_color_space_name(enc->colorspace),

  946.                      av_color_primaries_name(enc->color_primaries),

  947.                      av_color_transfer_name(enc->color_trc));

  948.         }

  949.         if (av_log_get_level() >= AV_LOG_DEBUG &&

  950.             enc->chroma_sample_location != AVCHROMA_LOC_UNSPECIFIED)

  951.             snprintf(buf + strlen(buf), buf_size - strlen(buf), ", %s",

  952.                      av_chroma_location_name(enc->chroma_sample_location));

  953. 

  954.         if (enc->width) {

  955.             av_strlcat(buf, new_line ? "\n      " : ", ", buf_size);

  956. 

  957.             snprintf(buf + strlen(buf), buf_size - strlen(buf),

  958.                      "%dx%d",

  959.                      enc->width, enc->height);

  960. 

  961.             if (av_log_get_level() >= AV_LOG_VERBOSE &&

  962.                 (enc->width != enc->coded_width ||

  963.                  enc->height != enc->coded_height))

  964.                 snprintf(buf + strlen(buf), buf_size - strlen(buf),

  965.                          " (%dx%d)", enc->coded_width, enc->coded_height);

  966. 

  967.             if (enc->sample_aspect_ratio.num) {

  968.                 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,

  969.                           enc->width * enc->sample_aspect_ratio.num,

  970.                           enc->height * enc->sample_aspect_ratio.den,

  971.                           1024 * 1024);

  972.                 snprintf(buf + strlen(buf), buf_size - strlen(buf),

  973.                          " [PAR %d:%d DAR %d:%d]",

  974.                          enc->sample_aspect_ratio.num, enc->sample_aspect_ratio.den,

  975.                          display_aspect_ratio.num, display_aspect_ratio.den);

  976.             }

  977.             if (av_log_get_level() >= AV_LOG_DEBUG) {

  978.                 int g = av_gcd(enc->time_base.num, enc->time_base.den);

  979.                 snprintf(buf + strlen(buf), buf_size - strlen(buf),

  980.                          ", %d/%d",

  981.                          enc->time_base.num / g, enc->time_base.den / g);

  982.             }

  983.         }

  984.         if (encode) {

  985.             snprintf(buf + strlen(buf), buf_size - strlen(buf),

  986.                      ", q=%d-%d", enc->qmin, enc->qmax);

  987.         }

  988.         break;

  989.     case AVMEDIA_TYPE_AUDIO:

  990.         snprintf(buf, buf_size,

  991.                  "Audio: %s",

  992.                  codec_name);

  993.         if (profile)

  994.             snprintf(buf + strlen(buf), buf_size - strlen(buf),

  995.                      " (%s)", profile);

  996.         if (enc->codec_tag) {

  997.             char tag_buf[32];

  998.             av_get_codec_tag_string(tag_buf, sizeof(tag_buf), enc->codec_tag);

  999.             snprintf(buf + strlen(buf), buf_size - strlen(buf),

  1000.                      " [%s / 0x%04X]", tag_buf, enc->codec_tag);

  1001.         }

  1002. 

  1003.         av_strlcat(buf, "\n      ", buf_size);

  1004.         if (enc->sample_rate) {

  1005.             snprintf(buf + strlen(buf), buf_size - strlen(buf),

  1006.                      "%d Hz, ", enc->sample_rate);

  1007.         }

  1008.         av_get_channel_layout_string(buf + strlen(buf), buf_size - strlen(buf), enc->channels, enc->channel_layout);

  1009.         if (enc->sample_fmt != AV_SAMPLE_FMT_NONE) {

  1010.             snprintf(buf + strlen(buf), buf_size - strlen(buf),

  1011.                      ", %s", av_get_sample_fmt_name(enc->sample_fmt));

  1012.         }

  1013.         break;

  1014.     case AVMEDIA_TYPE_DATA:

  1015.         snprintf(buf, buf_size, "Data: %s", codec_name);

  1016.         break;

  1017.     case AVMEDIA_TYPE_SUBTITLE:

  1018.         snprintf(buf, buf_size, "Subtitle: %s", codec_name);

  1019.         break;

  1020.     case AVMEDIA_TYPE_ATTACHMENT:

  1021.         snprintf(buf, buf_size, "Attachment: %s", codec_name);

  1022.         break;

  1023.     default:

  1024.         snprintf(buf, buf_size, "Invalid Codec type %d", enc->codec_type);

  1025.         return;

  1026.     }

  1027.     if (encode) {

  1028.         if (enc->flags & AV_CODEC_FLAG_PASS1)

  1029.             snprintf(buf + strlen(buf), buf_size - strlen(buf),

  1030.                      ", pass 1");

  1031.         if (enc->flags & AV_CODEC_FLAG_PASS2)

  1032.             snprintf(buf + strlen(buf), buf_size - strlen(buf),

  1033.                      ", pass 2");

  1034.     }

  1035.     bitrate = get_bit_rate(enc);

  1036.     if (bitrate != 0) {

  1037.         snprintf(buf + strlen(buf), buf_size - strlen(buf),

  1038.                  ", %d kb/s", bitrate / 1000);

  1039.     }

  1040. }

  1041. 

  1042. const char *av_get_profile_name(const AVCodec *codec, int profile)

  1043. {

  1044.     const AVProfile *p;

  1045.     if (profile == FF_PROFILE_UNKNOWN || !codec->profiles)

  1046.         return NULL;

  1047. 

  1048.     for (p = codec->profiles; p->profile != FF_PROFILE_UNKNOWN; p++)

  1049.         if (p->profile == profile)

  1050.             return p->name;

  1051. 

  1052.     return NULL;

  1053. }

  1054. 

  1055. const char *avcodec_profile_name(enum AVCodecID codec_id, int profile)

  1056. {

  1057.     const AVCodecDescriptor *desc = avcodec_descriptor_get(codec_id);

  1058.     const AVProfile *p;

  1059. 

  1060.     if (profile == FF_PROFILE_UNKNOWN || !desc || !desc->profiles)

  1061.         return NULL;

  1062. 

  1063.     for (p = desc->profiles; p->profile != FF_PROFILE_UNKNOWN; p++)

  1064.         if (p->profile == profile)

  1065.             return p->name;

  1066. 

  1067.     return NULL;

  1068. }

  1069. 

  1070. unsigned avcodec_version(void)

  1071. {

  1072.     return LIBAVCODEC_VERSION_INT;

  1073. }

  1074. 

  1075. const char *avcodec_configuration(void)

  1076. {

  1077.     return LIBAV_CONFIGURATION;

  1078. }

  1079. 

  1080. const char *avcodec_license(void)

  1081. {

  1082. #define LICENSE_PREFIX "libavcodec license: "

  1083.     return LICENSE_PREFIX LIBAV_LICENSE + sizeof(LICENSE_PREFIX) - 1;

  1084. }

  1085. 

  1086. int av_get_exact_bits_per_sample(enum AVCodecID codec_id)

  1087. {

  1088.     switch (codec_id) {

  1089.     case AV_CODEC_ID_ADPCM_CT:

  1090.     case AV_CODEC_ID_ADPCM_IMA_APC:

  1091.     case AV_CODEC_ID_ADPCM_IMA_EA_SEAD:

  1092.     case AV_CODEC_ID_ADPCM_IMA_WS:

  1093.     case AV_CODEC_ID_ADPCM_G722:

  1094.     case AV_CODEC_ID_ADPCM_YAMAHA:

  1095.         return 4;

  1096.     case AV_CODEC_ID_PCM_ALAW:

  1097.     case AV_CODEC_ID_PCM_MULAW:

  1098.     case AV_CODEC_ID_PCM_S8:

  1099.     case AV_CODEC_ID_PCM_U8:

  1100.     case AV_CODEC_ID_PCM_ZORK:

  1101.         return 8;

  1102.     case AV_CODEC_ID_PCM_S16BE:

  1103.     case AV_CODEC_ID_PCM_S16BE_PLANAR:

  1104.     case AV_CODEC_ID_PCM_S16LE:

  1105.     case AV_CODEC_ID_PCM_S16LE_PLANAR:

  1106.     case AV_CODEC_ID_PCM_U16BE:

  1107.     case AV_CODEC_ID_PCM_U16LE:

  1108.         return 16;

  1109.     case AV_CODEC_ID_PCM_S24DAUD:

  1110.     case AV_CODEC_ID_PCM_S24BE:

  1111.     case AV_CODEC_ID_PCM_S24LE:

  1112.     case AV_CODEC_ID_PCM_S24LE_PLANAR:

  1113.     case AV_CODEC_ID_PCM_U24BE:

  1114.     case AV_CODEC_ID_PCM_U24LE:

  1115.         return 24;

  1116.     case AV_CODEC_ID_PCM_S32BE:

  1117.     case AV_CODEC_ID_PCM_S32LE:

  1118.     case AV_CODEC_ID_PCM_S32LE_PLANAR:

  1119.     case AV_CODEC_ID_PCM_U32BE:

  1120.     case AV_CODEC_ID_PCM_U32LE:

  1121.     case AV_CODEC_ID_PCM_F32BE:

  1122.     case AV_CODEC_ID_PCM_F32LE:

  1123.         return 32;

  1124.     case AV_CODEC_ID_PCM_F64BE:

  1125.     case AV_CODEC_ID_PCM_F64LE:

  1126.         return 64;

  1127.     default:

  1128.         return 0;

  1129.     }

  1130. }

  1131. 

  1132. int av_get_bits_per_sample(enum AVCodecID codec_id)

  1133. {

  1134.     switch (codec_id) {

  1135.     case AV_CODEC_ID_ADPCM_SBPRO_2:

  1136.         return 2;

  1137.     case AV_CODEC_ID_ADPCM_SBPRO_3:

  1138.         return 3;

  1139.     case AV_CODEC_ID_ADPCM_SBPRO_4:

  1140.     case AV_CODEC_ID_ADPCM_IMA_WAV:

  1141.     case AV_CODEC_ID_ADPCM_IMA_QT:

  1142.     case AV_CODEC_ID_ADPCM_SWF:

  1143.     case AV_CODEC_ID_ADPCM_MS:

  1144.         return 4;

  1145.     default:

  1146.         return av_get_exact_bits_per_sample(codec_id);

  1147.     }

  1148. }

  1149. 

  1150. static int get_audio_frame_duration(enum AVCodecID id, int sr, int ch, int ba,

  1151.                                     uint32_t tag, int bits_per_coded_sample, int frame_bytes)

  1152. {

  1153.     int bps = av_get_exact_bits_per_sample(id);

  1154. 

  1155.     /* codecs with an exact constant bits per sample */

  1156.     if (bps > 0 && ch > 0 && frame_bytes > 0)

  1157.         return (frame_bytes * 8) / (bps * ch);

  1158.     bps = bits_per_coded_sample;

  1159. 

  1160.     /* codecs with a fixed packet duration */

  1161.     switch (id) {

  1162.     case AV_CODEC_ID_ADPCM_ADX:    return   32;

  1163.     case AV_CODEC_ID_ADPCM_IMA_QT: return   64;

  1164.     case AV_CODEC_ID_ADPCM_EA_XAS: return  128;

  1165.     case AV_CODEC_ID_AMR_NB:

  1166.     case AV_CODEC_ID_GSM:

  1167.     case AV_CODEC_ID_QCELP:

  1168.     case AV_CODEC_ID_RA_144:

  1169.     case AV_CODEC_ID_RA_288:       return  160;

  1170.     case AV_CODEC_ID_IMC:          return  256;

  1171.     case AV_CODEC_ID_AMR_WB:

  1172.     case AV_CODEC_ID_GSM_MS:       return  320;

  1173.     case AV_CODEC_ID_MP1:          return  384;

  1174.     case AV_CODEC_ID_ATRAC1:       return  512;

  1175.     case AV_CODEC_ID_ATRAC3:       return 1024;

  1176.     case AV_CODEC_ID_MP2:

  1177.     case AV_CODEC_ID_MUSEPACK7:    return 1152;

  1178.     case AV_CODEC_ID_AC3:          return 1536;

  1179.     }

  1180. 

  1181.     if (sr > 0) {

  1182.         /* calc from sample rate */

  1183.         if (id == AV_CODEC_ID_TTA)

  1184.             return 256 * sr / 245;

  1185. 

  1186.         if (ch > 0) {

  1187.             /* calc from sample rate and channels */

  1188.             if (id == AV_CODEC_ID_BINKAUDIO_DCT)

  1189.                 return (480 << (sr / 22050)) / ch;

  1190.         }

  1191. 

  1192.         if (id == AV_CODEC_ID_MP3)

  1193.             return sr <= 24000 ? 576 : 1152;

  1194.     }

  1195. 

  1196.     if (ba > 0) {

  1197.         /* calc from block_align */

  1198.         if (id == AV_CODEC_ID_SIPR) {

  1199.             switch (ba) {

  1200.             case 20: return 160;

  1201.             case 19: return 144;

  1202.             case 29: return 288;

  1203.             case 37: return 480;

  1204.             }

  1205.         } else if (id == AV_CODEC_ID_ILBC) {

  1206.             switch (ba) {

  1207.             case 38: return 160;

  1208.             case 50: return 240;

  1209.             }

  1210.         }

  1211.     }

  1212. 

  1213.     if (frame_bytes > 0) {

  1214.         /* calc from frame_bytes only */

  1215.         if (id == AV_CODEC_ID_TRUESPEECH)

  1216.             return 240 * (frame_bytes / 32);

  1217.         if (id == AV_CODEC_ID_NELLYMOSER)

  1218.             return 256 * (frame_bytes / 64);

  1219. 

  1220.         if (bps > 0) {

  1221.             /* calc from frame_bytes and bits_per_coded_sample */

  1222.             if (id == AV_CODEC_ID_ADPCM_G726)

  1223.                 return frame_bytes * 8 / bps;

  1224.         }

  1225. 

  1226.         if (ch > 0) {

  1227.             /* calc from frame_bytes and channels */

  1228.             switch (id) {

  1229.             case AV_CODEC_ID_ADPCM_4XM:

  1230.             case AV_CODEC_ID_ADPCM_IMA_ISS:

  1231.                 return (frame_bytes - 4 * ch) * 2 / ch;

  1232.             case AV_CODEC_ID_ADPCM_IMA_SMJPEG:

  1233.                 return (frame_bytes - 4) * 2 / ch;

  1234.             case AV_CODEC_ID_ADPCM_IMA_AMV:

  1235.                 return (frame_bytes - 8) * 2 / ch;

  1236.             case AV_CODEC_ID_ADPCM_XA:

  1237.                 return (frame_bytes / 128) * 224 / ch;

  1238.             case AV_CODEC_ID_INTERPLAY_DPCM:

  1239.                 return (frame_bytes - 6 - ch) / ch;

  1240.             case AV_CODEC_ID_ROQ_DPCM:

  1241.                 return (frame_bytes - 8) / ch;

  1242.             case AV_CODEC_ID_XAN_DPCM:

  1243.                 return (frame_bytes - 2 * ch) / ch;

  1244.             case AV_CODEC_ID_MACE3:

  1245.                 return 3 * frame_bytes / ch;

  1246.             case AV_CODEC_ID_MACE6:

  1247.                 return 6 * frame_bytes / ch;

  1248.             case AV_CODEC_ID_PCM_LXF:

  1249.                 return 2 * (frame_bytes / (5 * ch));

  1250.             }

  1251. 

  1252.             if (tag) {

  1253.                 /* calc from frame_bytes, channels, and codec_tag */

  1254.                 if (id == AV_CODEC_ID_SOL_DPCM) {

  1255.                     if (tag == 3)

  1256.                         return frame_bytes / ch;

  1257.                     else

  1258.                         return frame_bytes * 2 / ch;

  1259.                 }

  1260.             }

  1261. 

  1262.             if (ba > 0) {

  1263.                 /* calc from frame_bytes, channels, and block_align */

  1264.                 int blocks = frame_bytes / ba;

  1265.                 switch (id) {

  1266.                 case AV_CODEC_ID_ADPCM_IMA_WAV:

  1267.                     return blocks * (1 + (ba - 4 * ch) / (4 * ch) * 8);

  1268.                 case AV_CODEC_ID_ADPCM_IMA_DK3:

  1269.                     return blocks * (((ba - 16) * 2 / 3 * 4) / ch);

  1270.                 case AV_CODEC_ID_ADPCM_IMA_DK4:

  1271.                     return blocks * (1 + (ba - 4 * ch) * 2 / ch);

  1272.                 case AV_CODEC_ID_ADPCM_MS:

  1273.                     return blocks * (2 + (ba - 7 * ch) * 2 / ch);

  1274.                 }

  1275.             }

  1276. 

  1277.             if (bps > 0) {

  1278.                 /* calc from frame_bytes, channels, and bits_per_coded_sample */

  1279.                 switch (id) {

  1280.                 case AV_CODEC_ID_PCM_DVD:

  1281.                     return 2 * (frame_bytes / ((bps * 2 / 8) * ch));

  1282.                 case AV_CODEC_ID_PCM_BLURAY:

  1283.                     return frame_bytes / ((FFALIGN(ch, 2) * bps) / 8);

  1284.                 case AV_CODEC_ID_S302M:

  1285.                     return 2 * (frame_bytes / ((bps + 4) / 4)) / ch;

  1286.                 }

  1287.             }

  1288.         }

  1289.     }

  1290. 

  1291.     return 0;

  1292. }

  1293. 

  1294. int av_get_audio_frame_duration(AVCodecContext *avctx, int frame_bytes)

  1295. {

  1296.     return get_audio_frame_duration(avctx->codec_id, avctx->sample_rate,

  1297.                                     avctx->channels, avctx->block_align,

  1298.                                     avctx->codec_tag, avctx->bits_per_coded_sample,

  1299.                                     frame_bytes);

  1300. }

  1301. 

  1302. int av_get_audio_frame_duration2(AVCodecParameters *par, int frame_bytes)

  1303. {

  1304.     return get_audio_frame_duration(par->codec_id, par->sample_rate,

  1305.                                     par->channels, par->block_align,

  1306.                                     par->codec_tag, par->bits_per_coded_sample,

  1307.                                     frame_bytes);

  1308. }

  1309. 

  1310. #if !HAVE_THREADS

  1311. int ff_thread_init(AVCodecContext *s)

  1312. {

  1313.     return -1;

  1314. }

  1315. 

  1316. #endif

  1317. 

  1318. unsigned int av_xiphlacing(unsigned char *s, unsigned int v)

  1319. {

  1320.     unsigned int n = 0;

  1321. 

  1322.     while (v >= 0xff) {

  1323.         *s++ = 0xff;

  1324.         v -= 0xff;

  1325.         n++;

  1326.     }

  1327.     *s = v;

  1328.     n++;

  1329.     return n;

  1330. }

  1331. 

  1332. int ff_match_2uint16(const uint16_t(*tab)[2], int size, int a, int b)

  1333. {

  1334.     int i;

  1335.     for (i = 0; i < size && !(tab[i][0] == a && tab[i][1] == b); i++) ;

  1336.     return i;

  1337. }

  1338. 

  1339. const AVCodecHWConfig *avcodec_get_hw_config(const AVCodec *codec, int index)

  1340. {

  1341.     int i;

  1342.     if (!codec->hw_configs || index < 0)

  1343.         return NULL;

  1344.     for (i = 0; i <= index; i++)

  1345.         if (!codec->hw_configs[i])

  1346.             return NULL;

  1347.     return &codec->hw_configs[index]->public;

  1348. }

  1349. 

  1350. #if FF_API_USER_VISIBLE_AVHWACCEL

  1351. AVHWAccel *av_hwaccel_next(const AVHWAccel *hwaccel)

  1352. {

  1353.     return NULL;

  1354. }

  1355. 

  1356. void av_register_hwaccel(AVHWAccel *hwaccel)

  1357. {

  1358. }

  1359. #endif

  1360. 

  1361. int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op))

  1362. {

  1363.     if (lockmgr_cb) {

  1364.         // There is no good way to rollback a failure to destroy the

  1365.         // mutex, so we ignore failures.

  1366.         lockmgr_cb(&codec_mutex,    AV_LOCK_DESTROY);

  1367.         lockmgr_cb(&avformat_mutex, AV_LOCK_DESTROY);

  1368.         lockmgr_cb     = NULL;

  1369.         codec_mutex    = NULL;

  1370.         avformat_mutex = NULL;

  1371.     }

  1372. 

  1373.     if (cb) {

  1374.         void *new_codec_mutex    = NULL;

  1375.         void *new_avformat_mutex = NULL;

  1376.         int err;

  1377.         if (err = cb(&new_codec_mutex, AV_LOCK_CREATE)) {

  1378.             return err > 0 ? AVERROR_UNKNOWN : err;

  1379.         }

  1380.         if (err = cb(&new_avformat_mutex, AV_LOCK_CREATE)) {

  1381.             // Ignore failures to destroy the newly created mutex.

  1382.             cb(&new_codec_mutex, AV_LOCK_DESTROY);

  1383.             return err > 0 ? AVERROR_UNKNOWN : err;

  1384.         }

  1385.         lockmgr_cb     = cb;

  1386.         codec_mutex    = new_codec_mutex;

  1387.         avformat_mutex = new_avformat_mutex;

  1388.     }

  1389. 

  1390.     return 0;

  1391. }

  1392. 

  1393. int avpriv_lock_avformat(void)

  1394. {

  1395.     if (lockmgr_cb) {

  1396.         if ((*lockmgr_cb)(&avformat_mutex, AV_LOCK_OBTAIN))

  1397.             return -1;

  1398.     }

  1399.     return 0;

  1400. }

  1401. 

  1402. int avpriv_unlock_avformat(void)

  1403. {

  1404.     if (lockmgr_cb) {

  1405.         if ((*lockmgr_cb)(&avformat_mutex, AV_LOCK_RELEASE))

  1406.             return -1;

  1407.     }

  1408.     return 0;

  1409. }

  1410. 

  1411. unsigned int avpriv_toupper4(unsigned int x)

  1412. {

  1413.     return av_toupper(x & 0xFF) +

  1414.           (av_toupper((x >>  8) & 0xFF) << 8)  +

  1415.           (av_toupper((x >> 16) & 0xFF) << 16) +

  1416.           (av_toupper((x >> 24) & 0xFF) << 24);

  1417. }

  1418. 

  1419. int ff_thread_ref_frame(ThreadFrame *dst, ThreadFrame *src)

  1420. {

  1421.     int ret;

  1422. 

  1423.     dst->owner = src->owner;

  1424. 

  1425.     ret = av_frame_ref(dst->f, src->f);

  1426.     if (ret < 0)

  1427.         return ret;

  1428. 

  1429.     if (src->progress &&

  1430.         !(dst->progress = av_buffer_ref(src->progress))) {

  1431.         ff_thread_release_buffer(dst->owner, dst);

  1432.         return AVERROR(ENOMEM);

  1433.     }

  1434. 

  1435.     return 0;

  1436. }

  1437. 

  1438. #if !HAVE_THREADS

  1439. 

  1440. int ff_thread_get_buffer(AVCodecContext *avctx, ThreadFrame *f, int flags)

  1441. {

  1442.     f->owner = avctx;

  1443.     return ff_get_buffer(avctx, f->f, flags);

  1444. }

  1445. 

  1446. void ff_thread_release_buffer(AVCodecContext *avctx, ThreadFrame *f)

  1447. {

  1448.     if (f->f)

  1449.         av_frame_unref(f->f);

  1450. }

  1451. 

  1452. void ff_thread_finish_setup(AVCodecContext *avctx)

  1453. {

  1454. }

  1455. 

  1456. void ff_thread_report_progress(ThreadFrame *f, int progress, int field)

  1457. {

  1458. }

  1459. 

  1460. void ff_thread_await_progress(ThreadFrame *f, int progress, int field)

  1461. {

  1462. }

  1463. 

  1464. #endif

  1465. 

  1466. int avcodec_is_open(AVCodecContext *s)

  1467. {

  1468.     return !!s->internal;

  1469. }

  1470. 

  1471. const uint8_t *avpriv_find_start_code(const uint8_t *restrict p,

  1472.                                       const uint8_t *end,

  1473.                                       uint32_t * restrict state)

  1474. {

  1475.     int i;

  1476. 

  1477.     assert(p <= end);

  1478.     if (p >= end)

  1479.         return end;

  1480. 

  1481.     for (i = 0; i < 3; i++) {

  1482.         uint32_t tmp = *state << 8;

  1483.         *state = tmp + *(p++);

  1484.         if (tmp == 0x100 || p == end)

  1485.             return p;

  1486.     }

  1487. 

  1488.     while (p < end) {

  1489.         if      (p[-1] > 1      ) p += 3;

  1490.         else if (p[-2]          ) p += 2;

  1491.         else if (p[-3]|(p[-1]-1)) p++;

  1492.         else {

  1493.             p++;

  1494.             break;

  1495.         }

  1496.     }

  1497. 

  1498.     p = FFMIN(p, end) - 4;

  1499.     *state = AV_RB32(p);

  1500. 

  1501.     return p + 4;

  1502. }

  1503. 

  1504. AVCPBProperties *av_cpb_properties_alloc(size_t *size)

  1505. {

  1506.     AVCPBProperties *props = av_mallocz(sizeof(AVCPBProperties));

  1507.     if (!props)

  1508.         return NULL;

  1509. 

  1510.     if (size)

  1511.         *size = sizeof(*props);

  1512. 

  1513.     props->vbv_delay = UINT64_MAX;

  1514. 

  1515.     return props;

  1516. }

  1517. 

  1518. AVCPBProperties *ff_add_cpb_side_data(AVCodecContext *avctx)

  1519. {

  1520.     AVPacketSideData *tmp;

  1521.     AVCPBProperties  *props;

  1522.     size_t size;

  1523. 

  1524.     props = av_cpb_properties_alloc(&size);

  1525.     if (!props)

  1526.         return NULL;

  1527. 

  1528.     tmp = av_realloc_array(avctx->coded_side_data, avctx->nb_coded_side_data + 1, sizeof(*tmp));

  1529.     if (!tmp) {

  1530.         av_freep(&props);

  1531.         return NULL;

  1532.     }

  1533. 

  1534.     avctx->coded_side_data = tmp;

  1535.     avctx->nb_coded_side_data++;

  1536. 

  1537.     avctx->coded_side_data[avctx->nb_coded_side_data - 1].type = AV_PKT_DATA_CPB_PROPERTIES;

  1538.     avctx->coded_side_data[avctx->nb_coded_side_data - 1].data = (uint8_t*)props;

  1539.     avctx->coded_side_data[avctx->nb_coded_side_data - 1].size = size;

  1540. 

  1541.     return props;

  1542. }

  1543. 

  1544. static void codec_parameters_reset(AVCodecParameters *par)

  1545. {

  1546.     av_freep(&par->extradata);

  1547. 

  1548.     memset(par, 0, sizeof(*par));

  1549. 

  1550.     par->codec_type          = AVMEDIA_TYPE_UNKNOWN;

  1551.     par->codec_id            = AV_CODEC_ID_NONE;

  1552.     par->format              = -1;

  1553.     par->field_order         = AV_FIELD_UNKNOWN;

  1554.     par->color_range         = AVCOL_RANGE_UNSPECIFIED;

  1555.     par->color_primaries     = AVCOL_PRI_UNSPECIFIED;

  1556.     par->color_trc           = AVCOL_TRC_UNSPECIFIED;

  1557.     par->color_space         = AVCOL_SPC_UNSPECIFIED;

  1558.     par->chroma_location     = AVCHROMA_LOC_UNSPECIFIED;

  1559.     par->sample_aspect_ratio = (AVRational){ 0, 1 };

  1560. }

  1561. 

  1562. AVCodecParameters *avcodec_parameters_alloc(void)

  1563. {

  1564.     AVCodecParameters *par = av_mallocz(sizeof(*par));

  1565. 

  1566.     if (!par)

  1567.         return NULL;

  1568.     codec_parameters_reset(par);

  1569.     return par;

  1570. }

  1571. 

  1572. void avcodec_parameters_free(AVCodecParameters **ppar)

  1573. {

  1574.     AVCodecParameters *par = *ppar;

  1575. 

  1576.     if (!par)

  1577.         return;

  1578.     codec_parameters_reset(par);

  1579. 

  1580.     av_freep(ppar);

  1581. }

  1582. 

  1583. int avcodec_parameters_copy(AVCodecParameters *dst, const AVCodecParameters *src)

  1584. {

  1585.     codec_parameters_reset(dst);

  1586.     memcpy(dst, src, sizeof(*dst));

  1587. 

  1588.     dst->extradata      = NULL;

  1589.     dst->extradata_size = 0;

  1590.     if (src->extradata) {

  1591.         dst->extradata = av_mallocz(src->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);

  1592.         if (!dst->extradata)

  1593.             return AVERROR(ENOMEM);

  1594.         memcpy(dst->extradata, src->extradata, src->extradata_size);

  1595.         dst->extradata_size = src->extradata_size;

  1596.     }

  1597. 

  1598.     return 0;

  1599. }

  1600. 

  1601. int avcodec_parameters_from_context(AVCodecParameters *par,

  1602.                                     const AVCodecContext *codec)

  1603. {

  1604.     codec_parameters_reset(par);

  1605. 

  1606.     par->codec_type = codec->codec_type;

  1607.     par->codec_id   = codec->codec_id;

  1608.     par->codec_tag  = codec->codec_tag;

  1609. 

  1610.     par->bit_rate              = codec->bit_rate;

  1611.     par->bits_per_coded_sample = codec->bits_per_coded_sample;

  1612.     par->profile               = codec->profile;

  1613.     par->level                 = codec->level;

  1614. 

  1615.     switch (par->codec_type) {

  1616.     case AVMEDIA_TYPE_VIDEO:

  1617.         par->format              = codec->pix_fmt;

  1618.         par->width               = codec->width;

  1619.         par->height              = codec->height;

  1620.         par->field_order         = codec->field_order;

  1621.         par->color_range         = codec->color_range;

  1622.         par->color_primaries     = codec->color_primaries;

  1623.         par->color_trc           = codec->color_trc;

  1624.         par->color_space         = codec->colorspace;

  1625.         par->chroma_location     = codec->chroma_sample_location;

  1626.         par->sample_aspect_ratio = codec->sample_aspect_ratio;

  1627.         break;

  1628.     case AVMEDIA_TYPE_AUDIO:

  1629.         par->format          = codec->sample_fmt;

  1630.         par->channel_layout  = codec->channel_layout;

  1631.         par->channels        = codec->channels;

  1632.         par->sample_rate     = codec->sample_rate;

  1633.         par->block_align     = codec->block_align;

  1634.         par->initial_padding = codec->initial_padding;

  1635.         break;

  1636.     }

  1637. 

  1638.     if (codec->extradata) {

  1639.         par->extradata = av_mallocz(codec->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);

  1640.         if (!par->extradata)

  1641.             return AVERROR(ENOMEM);

  1642.         memcpy(par->extradata, codec->extradata, codec->extradata_size);

  1643.         par->extradata_size = codec->extradata_size;

  1644.     }

  1645. 

  1646.     return 0;

  1647. }

  1648. 

  1649. int avcodec_parameters_to_context(AVCodecContext *codec,

  1650.                                   const AVCodecParameters *par)

  1651. {

  1652.     codec->codec_type = par->codec_type;

  1653.     codec->codec_id   = par->codec_id;

  1654.     codec->codec_tag  = par->codec_tag;

  1655. 

  1656.     codec->bit_rate              = par->bit_rate;

  1657.     codec->bits_per_coded_sample = par->bits_per_coded_sample;

  1658.     codec->profile               = par->profile;

  1659.     codec->level                 = par->level;

  1660. 

  1661.     switch (par->codec_type) {

  1662.     case AVMEDIA_TYPE_VIDEO:

  1663.         codec->pix_fmt                = par->format;

  1664.         codec->width                  = par->width;

  1665.         codec->height                 = par->height;

  1666.         codec->field_order            = par->field_order;

  1667.         codec->color_range            = par->color_range;

  1668.         codec->color_primaries        = par->color_primaries;

  1669.         codec->color_trc              = par->color_trc;

  1670.         codec->colorspace             = par->color_space;

  1671.         codec->chroma_sample_location = par->chroma_location;

  1672.         codec->sample_aspect_ratio    = par->sample_aspect_ratio;

  1673.         break;

  1674.     case AVMEDIA_TYPE_AUDIO:

  1675.         codec->sample_fmt      = par->format;

  1676.         codec->channel_layout  = par->channel_layout;

  1677.         codec->channels        = par->channels;

  1678.         codec->sample_rate     = par->sample_rate;

  1679.         codec->block_align     = par->block_align;

  1680.         codec->initial_padding = par->initial_padding;

  1681.         break;

  1682.     }

  1683. 

  1684.     if (par->extradata) {

  1685.         av_freep(&codec->extradata);

  1686.         codec->extradata = av_mallocz(par->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);

  1687.         if (!codec->extradata)

  1688.             return AVERROR(ENOMEM);

  1689.         memcpy(codec->extradata, par->extradata, par->extradata_size);

  1690.         codec->extradata_size = par->extradata_size;

  1691.     }

  1692. 

  1693.     return 0;

  1694. }