/*
 * utils for libavcodec
 * Copyright (c) 2001 Fabrice Bellard
 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

/**
 * @file
 * utils.
 */

#include "config.h"
#include "libavutil/attributes.h"
#include "libavutil/avassert.h"
#include "libavutil/avstring.h"
#include "libavutil/bprint.h"
#include "libavutil/channel_layout.h"
#include "libavutil/crc.h"
#include "libavutil/frame.h"
#include "libavutil/hwcontext.h"
#include "libavutil/internal.h"
#include "libavutil/mathematics.h"
#include "libavutil/mem_internal.h"
#include "libavutil/pixdesc.h"
#include "libavutil/imgutils.h"
#include "libavutil/samplefmt.h"
#include "libavutil/dict.h"
#include "libavutil/thread.h"
#include "avcodec.h"
#include "decode.h"
#include "hwconfig.h"
#include "libavutil/opt.h"
#include "mpegvideo.h"
#include "thread.h"
#include "frame_thread_encoder.h"
#include "internal.h"
#include "raw.h"
#include "bytestream.h"
#include "version.h"
#include <stdlib.h>
#include <stdarg.h>
#include <stdatomic.h>
#include <limits.h>
#include <float.h>
#if CONFIG_ICONV
# include <iconv.h>
#endif

#include "libavutil/ffversion.h"
const char av_codec_ffversion[] = "FFmpeg version " FFMPEG_VERSION;

static AVMutex codec_mutex = AV_MUTEX_INITIALIZER;

void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size)
{
    uint8_t **p = ptr;
    if (min_size > SIZE_MAX - AV_INPUT_BUFFER_PADDING_SIZE) {
        av_freep(p);
        *size = 0;
        return;
    }
    if (!ff_fast_malloc(p, size, min_size + AV_INPUT_BUFFER_PADDING_SIZE, 1))
        memset(*p + min_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
}

void av_fast_padded_mallocz(void *ptr, unsigned int *size, size_t min_size)
{
    uint8_t **p = ptr;
    if (min_size > SIZE_MAX - AV_INPUT_BUFFER_PADDING_SIZE) {
        av_freep(p);
        *size = 0;
        return;
    }
    if (!ff_fast_malloc(p, size, min_size + AV_INPUT_BUFFER_PADDING_SIZE, 1))
        memset(*p, 0, min_size + AV_INPUT_BUFFER_PADDING_SIZE);
}

int av_codec_is_encoder(const AVCodec *codec)
{
    return codec && (codec->encode_sub || codec->encode2 ||codec->send_frame);
}

int av_codec_is_decoder(const AVCodec *codec)
{
    return codec && (codec->decode || codec->receive_frame);
}

int ff_set_dimensions(AVCodecContext *s, int width, int height)
{
    int ret = av_image_check_size2(width, height, s->max_pixels, AV_PIX_FMT_NONE, 0, s);

    if (ret < 0)
        width = height = 0;

    s->coded_width  = width;
    s->coded_height = height;
    s->width        = AV_CEIL_RSHIFT(width,  s->lowres);
    s->height       = AV_CEIL_RSHIFT(height, s->lowres);

    return ret;
}

int ff_set_sar(AVCodecContext *avctx, AVRational sar)
{
    int ret = av_image_check_sar(avctx->width, avctx->height, sar);

    if (ret < 0) {
        av_log(avctx, AV_LOG_WARNING, "ignoring invalid SAR: %d/%d\n",
               sar.num, sar.den);
        avctx->sample_aspect_ratio = (AVRational){ 0, 1 };
        return ret;
    } else {
        avctx->sample_aspect_ratio = sar;
    }
    return 0;
}

int ff_side_data_update_matrix_encoding(AVFrame *frame,
                                        enum AVMatrixEncoding matrix_encoding)
{
    AVFrameSideData *side_data;
    enum AVMatrixEncoding *data;

    side_data = av_frame_get_side_data(frame, AV_FRAME_DATA_MATRIXENCODING);
    if (!side_data)
        side_data = av_frame_new_side_data(frame, AV_FRAME_DATA_MATRIXENCODING,
                                           sizeof(enum AVMatrixEncoding));

    if (!side_data)
        return AVERROR(ENOMEM);

    data  = (enum AVMatrixEncoding*)side_data->data;
    *data = matrix_encoding;

    return 0;
}

void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height,
                               int linesize_align[AV_NUM_DATA_POINTERS])
{
    int i;
    int w_align = 1;
    int h_align = 1;
    AVPixFmtDescriptor const *desc = av_pix_fmt_desc_get(s->pix_fmt);

    if (desc) {
        w_align = 1 << desc->log2_chroma_w;
        h_align = 1 << desc->log2_chroma_h;
    }

    switch (s->pix_fmt) {
    case AV_PIX_FMT_YUV420P:
    case AV_PIX_FMT_YUYV422:
    case AV_PIX_FMT_YVYU422:
    case AV_PIX_FMT_UYVY422:
    case AV_PIX_FMT_YUV422P:
    case AV_PIX_FMT_YUV440P:
    case AV_PIX_FMT_YUV444P:
    case AV_PIX_FMT_GBRP:
    case AV_PIX_FMT_GBRAP:
    case AV_PIX_FMT_GRAY8:
    case AV_PIX_FMT_GRAY16BE:
    case AV_PIX_FMT_GRAY16LE:
    case AV_PIX_FMT_YUVJ420P:
    case AV_PIX_FMT_YUVJ422P:
    case AV_PIX_FMT_YUVJ440P:
    case AV_PIX_FMT_YUVJ444P:
    case AV_PIX_FMT_YUVA420P:
    case AV_PIX_FMT_YUVA422P:
    case AV_PIX_FMT_YUVA444P:
    case AV_PIX_FMT_YUV420P9LE:
    case AV_PIX_FMT_YUV420P9BE:
    case AV_PIX_FMT_YUV420P10LE:
    case AV_PIX_FMT_YUV420P10BE:
    case AV_PIX_FMT_YUV420P12LE:
    case AV_PIX_FMT_YUV420P12BE:
    case AV_PIX_FMT_YUV420P14LE:
    case AV_PIX_FMT_YUV420P14BE:
    case AV_PIX_FMT_YUV420P16LE:
    case AV_PIX_FMT_YUV420P16BE:
    case AV_PIX_FMT_YUVA420P9LE:
    case AV_PIX_FMT_YUVA420P9BE:
    case AV_PIX_FMT_YUVA420P10LE:
    case AV_PIX_FMT_YUVA420P10BE:
    case AV_PIX_FMT_YUVA420P16LE:
    case AV_PIX_FMT_YUVA420P16BE:
    case AV_PIX_FMT_YUV422P9LE:
    case AV_PIX_FMT_YUV422P9BE:
    case AV_PIX_FMT_YUV422P10LE:
    case AV_PIX_FMT_YUV422P10BE:
    case AV_PIX_FMT_YUV422P12LE:
    case AV_PIX_FMT_YUV422P12BE:
    case AV_PIX_FMT_YUV422P14LE:
    case AV_PIX_FMT_YUV422P14BE:
    case AV_PIX_FMT_YUV422P16LE:
    case AV_PIX_FMT_YUV422P16BE:
    case AV_PIX_FMT_YUVA422P9LE:
    case AV_PIX_FMT_YUVA422P9BE:
    case AV_PIX_FMT_YUVA422P10LE:
    case AV_PIX_FMT_YUVA422P10BE:
    case AV_PIX_FMT_YUVA422P12LE:
    case AV_PIX_FMT_YUVA422P12BE:
    case AV_PIX_FMT_YUVA422P16LE:
    case AV_PIX_FMT_YUVA422P16BE:
    case AV_PIX_FMT_YUV440P10LE:
    case AV_PIX_FMT_YUV440P10BE:
    case AV_PIX_FMT_YUV440P12LE:
    case AV_PIX_FMT_YUV440P12BE:
    case AV_PIX_FMT_YUV444P9LE:
    case AV_PIX_FMT_YUV444P9BE:
    case AV_PIX_FMT_YUV444P10LE:
    case AV_PIX_FMT_YUV444P10BE:
    case AV_PIX_FMT_YUV444P12LE:
    case AV_PIX_FMT_YUV444P12BE:
    case AV_PIX_FMT_YUV444P14LE:
    case AV_PIX_FMT_YUV444P14BE:
    case AV_PIX_FMT_YUV444P16LE:
    case AV_PIX_FMT_YUV444P16BE:
    case AV_PIX_FMT_YUVA444P9LE:
    case AV_PIX_FMT_YUVA444P9BE:
    case AV_PIX_FMT_YUVA444P10LE:
    case AV_PIX_FMT_YUVA444P10BE:
    case AV_PIX_FMT_YUVA444P12LE:
    case AV_PIX_FMT_YUVA444P12BE:
    case AV_PIX_FMT_YUVA444P16LE:
    case AV_PIX_FMT_YUVA444P16BE:
    case AV_PIX_FMT_GBRP9LE:
    case AV_PIX_FMT_GBRP9BE:
    case AV_PIX_FMT_GBRP10LE:
    case AV_PIX_FMT_GBRP10BE:
    case AV_PIX_FMT_GBRP12LE:
    case AV_PIX_FMT_GBRP12BE:
    case AV_PIX_FMT_GBRP14LE:
    case AV_PIX_FMT_GBRP14BE:
    case AV_PIX_FMT_GBRP16LE:
    case AV_PIX_FMT_GBRP16BE:
    case AV_PIX_FMT_GBRAP12LE:
    case AV_PIX_FMT_GBRAP12BE:
    case AV_PIX_FMT_GBRAP16LE:
    case AV_PIX_FMT_GBRAP16BE:
        w_align = 16; //FIXME assume 16 pixel per macroblock
        h_align = 16 * 2; // interlaced needs 2 macroblocks height
        break;
    case AV_PIX_FMT_YUV411P:
    case AV_PIX_FMT_YUVJ411P:
    case AV_PIX_FMT_UYYVYY411:
        w_align = 32;
        h_align = 16 * 2;
        break;
    case AV_PIX_FMT_YUV410P:
        if (s->codec_id == AV_CODEC_ID_SVQ1) {
            w_align = 64;
            h_align = 64;
        }
        break;
    case AV_PIX_FMT_RGB555:
        if (s->codec_id == AV_CODEC_ID_RPZA) {
            w_align = 4;
            h_align = 4;
        }
        if (s->codec_id == AV_CODEC_ID_INTERPLAY_VIDEO) {
            w_align = 8;
            h_align = 8;
        }
        break;
    case AV_PIX_FMT_PAL8:
    case AV_PIX_FMT_BGR8:
    case AV_PIX_FMT_RGB8:
        if (s->codec_id == AV_CODEC_ID_SMC ||
            s->codec_id == AV_CODEC_ID_CINEPAK) {
            w_align = 4;
            h_align = 4;
        }
        if (s->codec_id == AV_CODEC_ID_JV ||
            s->codec_id == AV_CODEC_ID_INTERPLAY_VIDEO) {
            w_align = 8;
            h_align = 8;
        }
        break;
    case AV_PIX_FMT_BGR24:
        if ((s->codec_id == AV_CODEC_ID_MSZH) ||
            (s->codec_id == AV_CODEC_ID_ZLIB)) {
            w_align = 4;
            h_align = 4;
        }
        break;
    case AV_PIX_FMT_RGB24:
        if (s->codec_id == AV_CODEC_ID_CINEPAK) {
            w_align = 4;
            h_align = 4;
        }
        break;
    default:
        break;
    }

    if (s->codec_id == AV_CODEC_ID_IFF_ILBM) {
        w_align = FFMAX(w_align, 8);
    }

    *width  = FFALIGN(*width, w_align);
    *height = FFALIGN(*height, h_align);
    if (s->codec_id == AV_CODEC_ID_H264 || s->lowres ||
        s->codec_id == AV_CODEC_ID_VP5  || s->codec_id == AV_CODEC_ID_VP6 ||
        s->codec_id == AV_CODEC_ID_VP6F || s->codec_id == AV_CODEC_ID_VP6A
    ) {
        // some of the optimized chroma MC reads one line too much
        // which is also done in mpeg decoders with lowres > 0
        *height += 2;

        // H.264 uses edge emulation for out of frame motion vectors, for this
        // it requires a temporary area large enough to hold a 21x21 block,
        // increasing witdth ensure that the temporary area is large enough,
        // the next rounded up width is 32
        *width = FFMAX(*width, 32);
    }

    for (i = 0; i < 4; i++)
        linesize_align[i] = STRIDE_ALIGN;
}

void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height)
{
    const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(s->pix_fmt);
    int chroma_shift = desc->log2_chroma_w;
    int linesize_align[AV_NUM_DATA_POINTERS];
    int align;

    avcodec_align_dimensions2(s, width, height, linesize_align);
    align               = FFMAX(linesize_align[0], linesize_align[3]);
    linesize_align[1] <<= chroma_shift;
    linesize_align[2] <<= chroma_shift;
    align               = FFMAX3(align, linesize_align[1], linesize_align[2]);
    *width              = FFALIGN(*width, align);
}

int avcodec_enum_to_chroma_pos(int *xpos, int *ypos, enum AVChromaLocation pos)
{
    if (pos <= AVCHROMA_LOC_UNSPECIFIED || pos >= AVCHROMA_LOC_NB)
        return AVERROR(EINVAL);
    pos--;

    *xpos = (pos&1) * 128;
    *ypos = ((pos>>1)^(pos<4)) * 128;

    return 0;
}

enum AVChromaLocation avcodec_chroma_pos_to_enum(int xpos, int ypos)
{
    int pos, xout, yout;

    for (pos = AVCHROMA_LOC_UNSPECIFIED + 1; pos < AVCHROMA_LOC_NB; pos++) {
        if (avcodec_enum_to_chroma_pos(&xout, &yout, pos) == 0 && xout == xpos && yout == ypos)
            return pos;
    }
    return AVCHROMA_LOC_UNSPECIFIED;
}

int avcodec_fill_audio_frame(AVFrame *frame, int nb_channels,
                             enum AVSampleFormat sample_fmt, const uint8_t *buf,
                             int buf_size, int align)
{
    int ch, planar, needed_size, ret = 0;

    needed_size = av_samples_get_buffer_size(NULL, nb_channels,
                                             frame->nb_samples, sample_fmt,
                                             align);
    if (buf_size < needed_size)
        return AVERROR(EINVAL);

    planar = av_sample_fmt_is_planar(sample_fmt);
    if (planar && nb_channels > AV_NUM_DATA_POINTERS) {
        if (!(frame->extended_data = av_mallocz_array(nb_channels,
                                                sizeof(*frame->extended_data))))
            return AVERROR(ENOMEM);
    } else {
        frame->extended_data = frame->data;
    }

    if ((ret = av_samples_fill_arrays(frame->extended_data, &frame->linesize[0],
                                      (uint8_t *)(intptr_t)buf, nb_channels, frame->nb_samples,
                                      sample_fmt, align)) < 0) {
        if (frame->extended_data != frame->data)
            av_freep(&frame->extended_data);
        return ret;
    }
    if (frame->extended_data != frame->data) {
        for (ch = 0; ch < AV_NUM_DATA_POINTERS; ch++)
            frame->data[ch] = frame->extended_data[ch];
    }

    return ret;
}

void ff_color_frame(AVFrame *frame, const int c[4])
{
    const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(frame->format);
    int p, y;

    av_assert0(desc->flags & AV_PIX_FMT_FLAG_PLANAR);

    for (p = 0; p<desc->nb_components; p++) {
        uint8_t *dst = frame->data[p];
        int is_chroma = p == 1 || p == 2;
        int bytes  = is_chroma ? AV_CEIL_RSHIFT(frame->width,  desc->log2_chroma_w) : frame->width;
        int height = is_chroma ? AV_CEIL_RSHIFT(frame->height, desc->log2_chroma_h) : frame->height;
        if (desc->comp[0].depth >= 9) {
            ((uint16_t*)dst)[0] = c[p];
            av_memcpy_backptr(dst + 2, 2, bytes - 2);
            dst += frame->linesize[p];
            for (y = 1; y < height; y++) {
                memcpy(dst, frame->data[p], 2*bytes);
                dst += frame->linesize[p];
            }
        } else {
            for (y = 0; y < height; y++) {
                memset(dst, c[p], bytes);
                dst += frame->linesize[p];
            }
        }
    }
}

int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2), void *arg, int *ret, int count, int size)
{
    int i;

    for (i = 0; i < count; i++) {
        int r = func(c, (char *)arg + i * size);
        if (ret)
            ret[i] = r;
    }
    emms_c();
    return 0;
}

int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int jobnr, int threadnr), void *arg, int *ret, int count)
{
    int i;

    for (i = 0; i < count; i++) {
        int r = func(c, arg, i, 0);
        if (ret)
            ret[i] = r;
    }
    emms_c();
    return 0;
}

enum AVPixelFormat avpriv_find_pix_fmt(const PixelFormatTag *tags,
                                       unsigned int fourcc)
{
    while (tags->pix_fmt >= 0) {
        if (tags->fourcc == fourcc)
            return tags->pix_fmt;
        tags++;
    }
    return AV_PIX_FMT_NONE;
}

#if FF_API_CODEC_GET_SET
MAKE_ACCESSORS(AVCodecContext, codec, AVRational, pkt_timebase)
MAKE_ACCESSORS(AVCodecContext, codec, const AVCodecDescriptor *, codec_descriptor)
MAKE_ACCESSORS(AVCodecContext, codec, int, lowres)
MAKE_ACCESSORS(AVCodecContext, codec, int, seek_preroll)
MAKE_ACCESSORS(AVCodecContext, codec, uint16_t*, chroma_intra_matrix)

unsigned av_codec_get_codec_properties(const AVCodecContext *codec)
{
    return codec->properties;
}

int av_codec_get_max_lowres(const AVCodec *codec)
{
    return codec->max_lowres;
}
#endif

int avpriv_codec_get_cap_skip_frame_fill_param(const AVCodec *codec){
    return !!(codec->caps_internal & FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM);
}

static int64_t get_bit_rate(AVCodecContext *ctx)
{
    int64_t bit_rate;
    int bits_per_sample;

    switch (ctx->codec_type) {
    case AVMEDIA_TYPE_VIDEO:
    case AVMEDIA_TYPE_DATA:
    case AVMEDIA_TYPE_SUBTITLE:
    case AVMEDIA_TYPE_ATTACHMENT:
        bit_rate = ctx->bit_rate;
        break;
    case AVMEDIA_TYPE_AUDIO:
        bits_per_sample = av_get_bits_per_sample(ctx->codec_id);
        bit_rate = bits_per_sample ? ctx->sample_rate * (int64_t)ctx->channels * bits_per_sample : ctx->bit_rate;
        break;
    default:
        bit_rate = 0;
        break;
    }
    return bit_rate;
}


static void ff_lock_avcodec(AVCodecContext *log_ctx, const AVCodec *codec)
{
    if (!(codec->caps_internal & FF_CODEC_CAP_INIT_THREADSAFE) && codec->init)
        ff_mutex_lock(&codec_mutex);
}

static void ff_unlock_avcodec(const AVCodec *codec)
{
    if (!(codec->caps_internal & FF_CODEC_CAP_INIT_THREADSAFE) && codec->init)
        ff_mutex_unlock(&codec_mutex);
}

int attribute_align_arg ff_codec_open2_recursive(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options)
{
    int ret = 0;

    ff_unlock_avcodec(codec);

    ret = avcodec_open2(avctx, codec, options);

    ff_lock_avcodec(avctx, codec);
    return ret;
}

int attribute_align_arg avcodec_open2(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options)
{
    int ret = 0;
    int codec_init_ok = 0;
    AVDictionary *tmp = NULL;
    const AVPixFmtDescriptor *pixdesc;
    AVCodecInternal *avci;

    if (avcodec_is_open(avctx))
        return 0;

    if (!codec && !avctx->codec) {
        av_log(avctx, AV_LOG_ERROR, "No codec provided to avcodec_open2()\n");
        return AVERROR(EINVAL);
    }
    if (codec && avctx->codec && codec != avctx->codec) {
        av_log(avctx, AV_LOG_ERROR, "This AVCodecContext was allocated for %s, "
                                    "but %s passed to avcodec_open2()\n", avctx->codec->name, codec->name);
        return AVERROR(EINVAL);
    }
    if (!codec)
        codec = avctx->codec;

    if (avctx->extradata_size < 0 || avctx->extradata_size >= FF_MAX_EXTRADATA_SIZE)
        return AVERROR(EINVAL);

    if (options)
        av_dict_copy(&tmp, *options, 0);

    ff_lock_avcodec(avctx, codec);

    avci = av_mallocz(sizeof(*avci));
    if (!avci) {
        ret = AVERROR(ENOMEM);
        goto end;
    }
    avctx->internal = avci;

    avci->to_free = av_frame_alloc();
    avci->compat_decode_frame = av_frame_alloc();
    avci->buffer_frame = av_frame_alloc();
    avci->buffer_pkt = av_packet_alloc();
    avci->ds.in_pkt = av_packet_alloc();
    avci->last_pkt_props = av_packet_alloc();
    if (!avci->to_free      || !avci->compat_decode_frame ||
        !avci->buffer_frame || !avci->buffer_pkt          ||
        !avci->ds.in_pkt    || !avci->last_pkt_props) {
        ret = AVERROR(ENOMEM);
        goto free_and_end;
    }

    avci->skip_samples_multiplier = 1;

    if (codec->priv_data_size > 0) {
        if (!avctx->priv_data) {
            avctx->priv_data = av_mallocz(codec->priv_data_size);
            if (!avctx->priv_data) {
                ret = AVERROR(ENOMEM);
                goto end;
            }
            if (codec->priv_class) {
                *(const AVClass **)avctx->priv_data = codec->priv_class;
                av_opt_set_defaults(avctx->priv_data);
            }
        }
        if (codec->priv_class && (ret = av_opt_set_dict(avctx->priv_data, &tmp)) < 0)
            goto free_and_end;
    } else {
        avctx->priv_data = NULL;
    }
    if ((ret = av_opt_set_dict(avctx, &tmp)) < 0)
        goto free_and_end;

    if (avctx->codec_whitelist && av_match_list(codec->name, avctx->codec_whitelist, ',') <= 0) {
        av_log(avctx, AV_LOG_ERROR, "Codec (%s) not on whitelist \'%s\'\n", codec->name, avctx->codec_whitelist);
        ret = AVERROR(EINVAL);
        goto free_and_end;
    }

    // only call ff_set_dimensions() for non H.264/VP6F/DXV codecs so as not to overwrite previously setup dimensions
    if (!(avctx->coded_width && avctx->coded_height && avctx->width && avctx->height &&
          (avctx->codec_id == AV_CODEC_ID_H264 || avctx->codec_id == AV_CODEC_ID_VP6F || avctx->codec_id == AV_CODEC_ID_DXV))) {
        if (avctx->coded_width && avctx->coded_height)
            ret = ff_set_dimensions(avctx, avctx->coded_width, avctx->coded_height);
        else if (avctx->width && avctx->height)
            ret = ff_set_dimensions(avctx, avctx->width, avctx->height);
        if (ret < 0)
            goto free_and_end;
    }

    if ((avctx->coded_width || avctx->coded_height || avctx->width || avctx->height)
        && (  av_image_check_size2(avctx->coded_width, avctx->coded_height, avctx->max_pixels, AV_PIX_FMT_NONE, 0, avctx) < 0
           || av_image_check_size2(avctx->width,       avctx->height,       avctx->max_pixels, AV_PIX_FMT_NONE, 0, avctx) < 0)) {
        av_log(avctx, AV_LOG_WARNING, "Ignoring invalid width/height values\n");
        ff_set_dimensions(avctx, 0, 0);
    }

    if (avctx->width > 0 && avctx->height > 0) {
        if (av_image_check_sar(avctx->width, avctx->height,
                               avctx->sample_aspect_ratio) < 0) {
            av_log(avctx, AV_LOG_WARNING, "ignoring invalid SAR: %u/%u\n",
                   avctx->sample_aspect_ratio.num,
                   avctx->sample_aspect_ratio.den);
            avctx->sample_aspect_ratio = (AVRational){ 0, 1 };
        }
    }

    /* if the decoder init function was already called previously,
     * free the already allocated subtitle_header before overwriting it */
    if (av_codec_is_decoder(codec))
        av_freep(&avctx->subtitle_header);

    if (avctx->channels > FF_SANE_NB_CHANNELS || avctx->channels < 0) {
        av_log(avctx, AV_LOG_ERROR, "Too many or invalid channels: %d\n", avctx->channels);
        ret = AVERROR(EINVAL);
        goto free_and_end;
    }
    if (avctx->sample_rate < 0) {
        av_log(avctx, AV_LOG_ERROR, "Invalid sample rate: %d\n", avctx->sample_rate);
        ret = AVERROR(EINVAL);
        goto free_and_end;
    }
    if (avctx->block_align < 0) {
        av_log(avctx, AV_LOG_ERROR, "Invalid block align: %d\n", avctx->block_align);
        ret = AVERROR(EINVAL);
        goto free_and_end;
    }

    avctx->codec = codec;
    if ((avctx->codec_type == AVMEDIA_TYPE_UNKNOWN || avctx->codec_type == codec->type) &&
        avctx->codec_id == AV_CODEC_ID_NONE) {
        avctx->codec_type = codec->type;
        avctx->codec_id   = codec->id;
    }
    if (avctx->codec_id != codec->id || (avctx->codec_type != codec->type
                                         && avctx->codec_type != AVMEDIA_TYPE_ATTACHMENT)) {
        av_log(avctx, AV_LOG_ERROR, "Codec type or id mismatches\n");
        ret = AVERROR(EINVAL);
        goto free_and_end;
    }
    avctx->frame_number = 0;
    avctx->codec_descriptor = avcodec_descriptor_get(avctx->codec_id);

    if ((avctx->codec->capabilities & AV_CODEC_CAP_EXPERIMENTAL) &&
        avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
        const char *codec_string = av_codec_is_encoder(codec) ? "encoder" : "decoder";
        AVCodec *codec2;
        av_log(avctx, AV_LOG_ERROR,
               "The %s '%s' is experimental but experimental codecs are not enabled, "
               "add '-strict %d' if you want to use it.\n",
               codec_string, codec->name, FF_COMPLIANCE_EXPERIMENTAL);
        codec2 = av_codec_is_encoder(codec) ? avcodec_find_encoder(codec->id) : avcodec_find_decoder(codec->id);
        if (!(codec2->capabilities & AV_CODEC_CAP_EXPERIMENTAL))
            av_log(avctx, AV_LOG_ERROR, "Alternatively use the non experimental %s '%s'.\n",
                codec_string, codec2->name);
        ret = AVERROR_EXPERIMENTAL;
        goto free_and_end;
    }

    if (avctx->codec_type == AVMEDIA_TYPE_AUDIO &&
        (!avctx->time_base.num || !avctx->time_base.den)) {
        avctx->time_base.num = 1;
        avctx->time_base.den = avctx->sample_rate;
    }

    if (!HAVE_THREADS)
        av_log(avctx, AV_LOG_WARNING, "Warning: not compiled with thread support, using thread emulation\n");

    if (CONFIG_FRAME_THREAD_ENCODER && av_codec_is_encoder(avctx->codec)) {
        ff_unlock_avcodec(codec); //we will instantiate a few encoders thus kick the counter to prevent false detection of a problem
        ret = ff_frame_thread_encoder_init(avctx, options ? *options : NULL);
        ff_lock_avcodec(avctx, codec);
        if (ret < 0)
            goto free_and_end;
    }

    if (av_codec_is_decoder(avctx->codec)) {
        ret = ff_decode_bsfs_init(avctx);
        if (ret < 0)
            goto free_and_end;
    }

    if (HAVE_THREADS
        && !(avci->frame_thread_encoder && (avctx->active_thread_type&FF_THREAD_FRAME))) {
        ret = ff_thread_init(avctx);
        if (ret < 0) {
            goto free_and_end;
        }
    }
    if (!HAVE_THREADS && !(codec->capabilities & AV_CODEC_CAP_AUTO_THREADS))
        avctx->thread_count = 1;

    if (avctx->codec->max_lowres < avctx->lowres || avctx->lowres < 0) {
        av_log(avctx, AV_LOG_WARNING, "The maximum value for lowres supported by the decoder is %d\n",
               avctx->codec->max_lowres);
        avctx->lowres = avctx->codec->max_lowres;
    }

    if (av_codec_is_encoder(avctx->codec)) {
        int i;
#if FF_API_CODED_FRAME
FF_DISABLE_DEPRECATION_WARNINGS
        avctx->coded_frame = av_frame_alloc();
        if (!avctx->coded_frame) {
            ret = AVERROR(ENOMEM);
            goto free_and_end;
        }
FF_ENABLE_DEPRECATION_WARNINGS
#endif

        if (avctx->time_base.num <= 0 || avctx->time_base.den <= 0) {
            av_log(avctx, AV_LOG_ERROR, "The encoder timebase is not set.\n");
            ret = AVERROR(EINVAL);
            goto free_and_end;
        }

        if (avctx->codec->sample_fmts) {
            for (i = 0; avctx->codec->sample_fmts[i] != AV_SAMPLE_FMT_NONE; i++) {
                if (avctx->sample_fmt == avctx->codec->sample_fmts[i])
                    break;
                if (avctx->channels == 1 &&
                    av_get_planar_sample_fmt(avctx->sample_fmt) ==
                    av_get_planar_sample_fmt(avctx->codec->sample_fmts[i])) {
                    avctx->sample_fmt = avctx->codec->sample_fmts[i];
                    break;
                }
            }
            if (avctx->codec->sample_fmts[i] == AV_SAMPLE_FMT_NONE) {
                char buf[128];
                snprintf(buf, sizeof(buf), "%d", avctx->sample_fmt);
                av_log(avctx, AV_LOG_ERROR, "Specified sample format %s is invalid or not supported\n",
                       (char *)av_x_if_null(av_get_sample_fmt_name(avctx->sample_fmt), buf));
                ret = AVERROR(EINVAL);
                goto free_and_end;
            }
        }
        if (avctx->codec->pix_fmts) {
            for (i = 0; avctx->codec->pix_fmts[i] != AV_PIX_FMT_NONE; i++)
                if (avctx->pix_fmt == avctx->codec->pix_fmts[i])
                    break;
            if (avctx->codec->pix_fmts[i] == AV_PIX_FMT_NONE
                && !((avctx->codec_id == AV_CODEC_ID_MJPEG || avctx->codec_id == AV_CODEC_ID_LJPEG)
                     && avctx->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL)) {
                char buf[128];
                snprintf(buf, sizeof(buf), "%d", avctx->pix_fmt);
                av_log(avctx, AV_LOG_ERROR, "Specified pixel format %s is invalid or not supported\n",
                       (char *)av_x_if_null(av_get_pix_fmt_name(avctx->pix_fmt), buf));
                ret = AVERROR(EINVAL);
                goto free_and_end;
            }
            if (avctx->codec->pix_fmts[i] == AV_PIX_FMT_YUVJ420P ||
                avctx->codec->pix_fmts[i] == AV_PIX_FMT_YUVJ411P ||
                avctx->codec->pix_fmts[i] == AV_PIX_FMT_YUVJ422P ||
                avctx->codec->pix_fmts[i] == AV_PIX_FMT_YUVJ440P ||
                avctx->codec->pix_fmts[i] == AV_PIX_FMT_YUVJ444P)
                avctx->color_range = AVCOL_RANGE_JPEG;
        }
        if (avctx->codec->supported_samplerates) {
            for (i = 0; avctx->codec->supported_samplerates[i] != 0; i++)
                if (avctx->sample_rate == avctx->codec->supported_samplerates[i])
                    break;
            if (avctx->codec->supported_samplerates[i] == 0) {
                av_log(avctx, AV_LOG_ERROR, "Specified sample rate %d is not supported\n",
                       avctx->sample_rate);
                ret = AVERROR(EINVAL);
                goto free_and_end;
            }
        }
        if (avctx->sample_rate < 0) {
            av_log(avctx, AV_LOG_ERROR, "Specified sample rate %d is not supported\n",
                    avctx->sample_rate);
            ret = AVERROR(EINVAL);
            goto free_and_end;
        }
        if (avctx->codec->channel_layouts) {
            if (!avctx->channel_layout) {
                av_log(avctx, AV_LOG_WARNING, "Channel layout not specified\n");
            } else {
                for (i = 0; avctx->codec->channel_layouts[i] != 0; i++)
                    if (avctx->channel_layout == avctx->codec->channel_layouts[i])
                        break;
                if (avctx->codec->channel_layouts[i] == 0) {
                    char buf[512];
                    av_get_channel_layout_string(buf, sizeof(buf), -1, avctx->channel_layout);
                    av_log(avctx, AV_LOG_ERROR, "Specified channel layout '%s' is not supported\n", buf);
                    ret = AVERROR(EINVAL);
                    goto free_and_end;
                }
            }
        }
        if (avctx->channel_layout && avctx->channels) {
            int channels = av_get_channel_layout_nb_channels(avctx->channel_layout);
            if (channels != avctx->channels) {
                char buf[512];
                av_get_channel_layout_string(buf, sizeof(buf), -1, avctx->channel_layout);
                av_log(avctx, AV_LOG_ERROR,
                       "Channel layout '%s' with %d channels does not match number of specified channels %d\n",
                       buf, channels, avctx->channels);
                ret = AVERROR(EINVAL);
                goto free_and_end;
            }
        } else if (avctx->channel_layout) {
            avctx->channels = av_get_channel_layout_nb_channels(avctx->channel_layout);
        }
        if (avctx->channels < 0) {
            av_log(avctx, AV_LOG_ERROR, "Specified number of channels %d is not supported\n",
                    avctx->channels);
            ret = AVERROR(EINVAL);
            goto free_and_end;
        }
        if(avctx->codec_type == AVMEDIA_TYPE_VIDEO) {
            pixdesc = av_pix_fmt_desc_get(avctx->pix_fmt);
            if (    avctx->bits_per_raw_sample < 0
                || (avctx->bits_per_raw_sample > 8 && pixdesc->comp[0].depth <= 8)) {
                av_log(avctx, AV_LOG_WARNING, "Specified bit depth %d not possible with the specified pixel formats depth %d\n",
                    avctx->bits_per_raw_sample, pixdesc->comp[0].depth);
                avctx->bits_per_raw_sample = pixdesc->comp[0].depth;
            }
            if (avctx->width <= 0 || avctx->height <= 0) {
                av_log(avctx, AV_LOG_ERROR, "dimensions not set\n");
                ret = AVERROR(EINVAL);
                goto free_and_end;
            }
        }
        if (   (avctx->codec_type == AVMEDIA_TYPE_VIDEO || avctx->codec_type == AVMEDIA_TYPE_AUDIO)
            && avctx->bit_rate>0 && avctx->bit_rate<1000) {
            av_log(avctx, AV_LOG_WARNING, "Bitrate %"PRId64" is extremely low, maybe you mean %"PRId64"k\n", avctx->bit_rate, avctx->bit_rate);
        }

        if (!avctx->rc_initial_buffer_occupancy)
            avctx->rc_initial_buffer_occupancy = avctx->rc_buffer_size * 3LL / 4;

        if (avctx->ticks_per_frame && avctx->time_base.num &&
            avctx->ticks_per_frame > INT_MAX / avctx->time_base.num) {
            av_log(avctx, AV_LOG_ERROR,
                   "ticks_per_frame %d too large for the timebase %d/%d.",
                   avctx->ticks_per_frame,
                   avctx->time_base.num,
                   avctx->time_base.den);
            goto free_and_end;
        }

        if (avctx->hw_frames_ctx) {
            AVHWFramesContext *frames_ctx = (AVHWFramesContext*)avctx->hw_frames_ctx->data;
            if (frames_ctx->format != avctx->pix_fmt) {
                av_log(avctx, AV_LOG_ERROR,
                       "Mismatching AVCodecContext.pix_fmt and AVHWFramesContext.format\n");
                ret = AVERROR(EINVAL);
                goto free_and_end;
            }
            if (avctx->sw_pix_fmt != AV_PIX_FMT_NONE &&
                avctx->sw_pix_fmt != frames_ctx->sw_format) {
                av_log(avctx, AV_LOG_ERROR,
                       "Mismatching AVCodecContext.sw_pix_fmt (%s) "
                       "and AVHWFramesContext.sw_format (%s)\n",
                       av_get_pix_fmt_name(avctx->sw_pix_fmt),
                       av_get_pix_fmt_name(frames_ctx->sw_format));
                ret = AVERROR(EINVAL);
                goto free_and_end;
            }
            avctx->sw_pix_fmt = frames_ctx->sw_format;
        }
    }

    avctx->pts_correction_num_faulty_pts =
    avctx->pts_correction_num_faulty_dts = 0;
    avctx->pts_correction_last_pts =
    avctx->pts_correction_last_dts = INT64_MIN;

    if (   !CONFIG_GRAY && avctx->flags & AV_CODEC_FLAG_GRAY
        && avctx->codec_descriptor->type == AVMEDIA_TYPE_VIDEO)
        av_log(avctx, AV_LOG_WARNING,
               "gray decoding requested but not enabled at configuration time\n");
    if (avctx->flags2 & AV_CODEC_FLAG2_EXPORT_MVS) {
        avctx->export_side_data |= AV_CODEC_EXPORT_DATA_MVS;
    }

    if (   avctx->codec->init && (!(avctx->active_thread_type&FF_THREAD_FRAME)
        || avci->frame_thread_encoder)) {
        ret = avctx->codec->init(avctx);
        if (ret < 0) {
            goto free_and_end;
        }
        codec_init_ok = 1;
    }

    ret=0;

    if (av_codec_is_decoder(avctx->codec)) {
        if (!avctx->bit_rate)
            avctx->bit_rate = get_bit_rate(avctx);
        /* validate channel layout from the decoder */
        if (avctx->channel_layout) {
            int channels = av_get_channel_layout_nb_channels(avctx->channel_layout);
            if (!avctx->channels)
                avctx->channels = channels;
            else if (channels != avctx->channels) {
                char buf[512];
                av_get_channel_layout_string(buf, sizeof(buf), -1, avctx->channel_layout);
                av_log(avctx, AV_LOG_WARNING,
                       "Channel layout '%s' with %d channels does not match specified number of channels %d: "
                       "ignoring specified channel layout\n",
                       buf, channels, avctx->channels);
                avctx->channel_layout = 0;
            }
        }
        if (avctx->channels && avctx->channels < 0 ||
            avctx->channels > FF_SANE_NB_CHANNELS) {
            ret = AVERROR(EINVAL);
            goto free_and_end;
        }
        if (avctx->bits_per_coded_sample < 0) {
            ret = AVERROR(EINVAL);
            goto free_and_end;
        }
        if (avctx->sub_charenc) {
            if (avctx->codec_type != AVMEDIA_TYPE_SUBTITLE) {
                av_log(avctx, AV_LOG_ERROR, "Character encoding is only "
                       "supported with subtitles codecs\n");
                ret = AVERROR(EINVAL);
                goto free_and_end;
            } else if (avctx->codec_descriptor->props & AV_CODEC_PROP_BITMAP_SUB) {
                av_log(avctx, AV_LOG_WARNING, "Codec '%s' is bitmap-based, "
                       "subtitles character encoding will be ignored\n",
                       avctx->codec_descriptor->name);
                avctx->sub_charenc_mode = FF_SUB_CHARENC_MODE_DO_NOTHING;
            } else {
                /* input character encoding is set for a text based subtitle
                 * codec at this point */
                if (avctx->sub_charenc_mode == FF_SUB_CHARENC_MODE_AUTOMATIC)
                    avctx->sub_charenc_mode = FF_SUB_CHARENC_MODE_PRE_DECODER;

                if (avctx->sub_charenc_mode == FF_SUB_CHARENC_MODE_PRE_DECODER) {
#if CONFIG_ICONV
                    iconv_t cd = iconv_open("UTF-8", avctx->sub_charenc);
                    if (cd == (iconv_t)-1) {
                        ret = AVERROR(errno);
                        av_log(avctx, AV_LOG_ERROR, "Unable to open iconv context "
                               "with input character encoding \"%s\"\n", avctx->sub_charenc);
                        goto free_and_end;
                    }
                    iconv_close(cd);
#else
                    av_log(avctx, AV_LOG_ERROR, "Character encoding subtitles "
                           "conversion needs a libavcodec built with iconv support "
                           "for this codec\n");
                    ret = AVERROR(ENOSYS);
                    goto free_and_end;
#endif
                }
            }
        }

#if FF_API_AVCTX_TIMEBASE
        if (avctx->framerate.num > 0 && avctx->framerate.den > 0)
            avctx->time_base = av_inv_q(av_mul_q(avctx->framerate, (AVRational){avctx->ticks_per_frame, 1}));
#endif
    }
    if (codec->priv_data_size > 0 && avctx->priv_data && codec->priv_class) {
        av_assert0(*(const AVClass **)avctx->priv_data == codec->priv_class);
    }

end:
    ff_unlock_avcodec(codec);
    if (options) {
        av_dict_free(options);
        *options = tmp;
    }

    return ret;
free_and_end:
    if (avctx->codec && avctx->codec->close &&
        (codec_init_ok ||
         (avctx->codec->caps_internal & FF_CODEC_CAP_INIT_CLEANUP)))
        avctx->codec->close(avctx);

    if (HAVE_THREADS && avci->thread_ctx)
        ff_thread_free(avctx);

    if (codec->priv_class && codec->priv_data_size)
        av_opt_free(avctx->priv_data);
    av_opt_free(avctx);

#if FF_API_CODED_FRAME
FF_DISABLE_DEPRECATION_WARNINGS
    av_frame_free(&avctx->coded_frame);
FF_ENABLE_DEPRECATION_WARNINGS
#endif

    av_dict_free(&tmp);
    av_freep(&avctx->priv_data);
    av_freep(&avctx->subtitle_header);
    if (avci) {
        av_frame_free(&avci->to_free);
        av_frame_free(&avci->compat_decode_frame);
        av_frame_free(&avci->buffer_frame);
        av_packet_free(&avci->buffer_pkt);
        av_packet_free(&avci->last_pkt_props);

        av_packet_free(&avci->ds.in_pkt);
        ff_decode_bsfs_uninit(avctx);

        av_buffer_unref(&avci->pool);
    }
    av_freep(&avci);
    avctx->internal = NULL;
    avctx->codec = NULL;
    goto end;
}

void avsubtitle_free(AVSubtitle *sub)
{
    int i;

    for (i = 0; i < sub->num_rects; i++) {
        av_freep(&sub->rects[i]->data[0]);
        av_freep(&sub->rects[i]->data[1]);
        av_freep(&sub->rects[i]->data[2]);
        av_freep(&sub->rects[i]->data[3]);
        av_freep(&sub->rects[i]->text);
        av_freep(&sub->rects[i]->ass);
        av_freep(&sub->rects[i]);
    }

    av_freep(&sub->rects);

    memset(sub, 0, sizeof(*sub));
}

av_cold int avcodec_close(AVCodecContext *avctx)
{
    int i;

    if (!avctx)
        return 0;

    if (avcodec_is_open(avctx)) {
        if (CONFIG_FRAME_THREAD_ENCODER &&
            avctx->internal->frame_thread_encoder && avctx->thread_count > 1) {
            ff_frame_thread_encoder_free(avctx);
        }
        if (HAVE_THREADS && avctx->internal->thread_ctx)
            ff_thread_free(avctx);
        if (avctx->codec && avctx->codec->close)
            avctx->codec->close(avctx);
        avctx->internal->byte_buffer_size = 0;
        av_freep(&avctx->internal->byte_buffer);
        av_frame_free(&avctx->internal->to_free);
        av_frame_free(&avctx->internal->compat_decode_frame);
        av_frame_free(&avctx->internal->buffer_frame);
        av_packet_free(&avctx->internal->buffer_pkt);
        av_packet_free(&avctx->internal->last_pkt_props);

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

        av_buffer_unref(&avctx->internal->pool);

        if (avctx->hwaccel && avctx->hwaccel->uninit)
            avctx->hwaccel->uninit(avctx);
        av_freep(&avctx->internal->hwaccel_priv_data);

        ff_decode_bsfs_uninit(avctx);

        av_freep(&avctx->internal);
    }

    for (i = 0; i < avctx->nb_coded_side_data; i++)
        av_freep(&avctx->coded_side_data[i].data);
    av_freep(&avctx->coded_side_data);
    avctx->nb_coded_side_data = 0;

    av_buffer_unref(&avctx->hw_frames_ctx);
    av_buffer_unref(&avctx->hw_device_ctx);

    if (avctx->priv_data && avctx->codec && avctx->codec->priv_class)
        av_opt_free(avctx->priv_data);
    av_opt_free(avctx);
    av_freep(&avctx->priv_data);
    if (av_codec_is_encoder(avctx->codec)) {
        av_freep(&avctx->extradata);
#if FF_API_CODED_FRAME
FF_DISABLE_DEPRECATION_WARNINGS
        av_frame_free(&avctx->coded_frame);
FF_ENABLE_DEPRECATION_WARNINGS
#endif
    }
    avctx->codec = NULL;
    avctx->active_thread_type = 0;

    return 0;
}

const char *avcodec_get_name(enum AVCodecID id)
{
    const AVCodecDescriptor *cd;
    AVCodec *codec;

    if (id == AV_CODEC_ID_NONE)
        return "none";
    cd = avcodec_descriptor_get(id);
    if (cd)
        return cd->name;
    av_log(NULL, AV_LOG_WARNING, "Codec 0x%x is not in the full list.\n", id);
    codec = avcodec_find_decoder(id);
    if (codec)
        return codec->name;
    codec = avcodec_find_encoder(id);
    if (codec)
        return codec->name;
    return "unknown_codec";
}

size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag)
{
    int i, len, ret = 0;

#define TAG_PRINT(x)                                              \
    (((x) >= '0' && (x) <= '9') ||                                \
     ((x) >= 'a' && (x) <= 'z') || ((x) >= 'A' && (x) <= 'Z') ||  \
     ((x) == '.' || (x) == ' ' || (x) == '-' || (x) == '_'))

    for (i = 0; i < 4; i++) {
        len = snprintf(buf, buf_size,
                       TAG_PRINT(codec_tag & 0xFF) ? "%c" : "[%d]", codec_tag & 0xFF);
        buf        += len;
        buf_size    = buf_size > len ? buf_size - len : 0;
        ret        += len;
        codec_tag >>= 8;
    }
    return ret;
}

void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
{
    const char *codec_type;
    const char *codec_name;
    const char *profile = NULL;
    int64_t bitrate;
    int new_line = 0;
    AVRational display_aspect_ratio;
    const char *separator = enc->dump_separator ? (const char *)enc->dump_separator : ", ";

    if (!buf || buf_size <= 0)
        return;
    codec_type = av_get_media_type_string(enc->codec_type);
    codec_name = avcodec_get_name(enc->codec_id);
    profile = avcodec_profile_name(enc->codec_id, enc->profile);

    snprintf(buf, buf_size, "%s: %s", codec_type ? codec_type : "unknown",
             codec_name);
    buf[0] ^= 'a' ^ 'A'; /* first letter in uppercase */

    if (enc->codec && strcmp(enc->codec->name, codec_name))
        snprintf(buf + strlen(buf), buf_size - strlen(buf), " (%s)", enc->codec->name);

    if (profile)
        snprintf(buf + strlen(buf), buf_size - strlen(buf), " (%s)", profile);
    if (   enc->codec_type == AVMEDIA_TYPE_VIDEO
        && av_log_get_level() >= AV_LOG_VERBOSE
        && enc->refs)
        snprintf(buf + strlen(buf), buf_size - strlen(buf),
                 ", %d reference frame%s",
                 enc->refs, enc->refs > 1 ? "s" : "");

    if (enc->codec_tag)
        snprintf(buf + strlen(buf), buf_size - strlen(buf), " (%s / 0x%04X)",
                 av_fourcc2str(enc->codec_tag), enc->codec_tag);

    switch (enc->codec_type) {
    case AVMEDIA_TYPE_VIDEO:
        {
            char detail[256] = "(";

            av_strlcat(buf, separator, buf_size);

            snprintf(buf + strlen(buf), buf_size - strlen(buf),
                 "%s", enc->pix_fmt == AV_PIX_FMT_NONE ? "none" :
                     av_get_pix_fmt_name(enc->pix_fmt));
            if (enc->bits_per_raw_sample && enc->pix_fmt != AV_PIX_FMT_NONE &&
                enc->bits_per_raw_sample < av_pix_fmt_desc_get(enc->pix_fmt)->comp[0].depth)
                av_strlcatf(detail, sizeof(detail), "%d bpc, ", enc->bits_per_raw_sample);
            if (enc->color_range != AVCOL_RANGE_UNSPECIFIED)
                av_strlcatf(detail, sizeof(detail), "%s, ",
                            av_color_range_name(enc->color_range));

            if (enc->colorspace != AVCOL_SPC_UNSPECIFIED ||
                enc->color_primaries != AVCOL_PRI_UNSPECIFIED ||
                enc->color_trc != AVCOL_TRC_UNSPECIFIED) {
                if (enc->colorspace != (int)enc->color_primaries ||
                    enc->colorspace != (int)enc->color_trc) {
                    new_line = 1;
                    av_strlcatf(detail, sizeof(detail), "%s/%s/%s, ",
                                av_color_space_name(enc->colorspace),
                                av_color_primaries_name(enc->color_primaries),
                                av_color_transfer_name(enc->color_trc));
                } else
                    av_strlcatf(detail, sizeof(detail), "%s, ",
                                av_get_colorspace_name(enc->colorspace));
            }

            if (enc->field_order != AV_FIELD_UNKNOWN) {
                const char *field_order = "progressive";
                if (enc->field_order == AV_FIELD_TT)
                    field_order = "top first";
                else if (enc->field_order == AV_FIELD_BB)
                    field_order = "bottom first";
                else if (enc->field_order == AV_FIELD_TB)
                    field_order = "top coded first (swapped)";
                else if (enc->field_order == AV_FIELD_BT)
                    field_order = "bottom coded first (swapped)";

                av_strlcatf(detail, sizeof(detail), "%s, ", field_order);
            }

            if (av_log_get_level() >= AV_LOG_VERBOSE &&
                enc->chroma_sample_location != AVCHROMA_LOC_UNSPECIFIED)
                av_strlcatf(detail, sizeof(detail), "%s, ",
                            av_chroma_location_name(enc->chroma_sample_location));

            if (strlen(detail) > 1) {
                detail[strlen(detail) - 2] = 0;
                av_strlcatf(buf, buf_size, "%s)", detail);
            }
        }

        if (enc->width) {
            av_strlcat(buf, new_line ? separator : ", ", buf_size);

            snprintf(buf + strlen(buf), buf_size - strlen(buf),
                     "%dx%d",
                     enc->width, enc->height);

            if (av_log_get_level() >= AV_LOG_VERBOSE &&
                (enc->width != enc->coded_width ||
                 enc->height != enc->coded_height))
                snprintf(buf + strlen(buf), buf_size - strlen(buf),
                         " (%dx%d)", enc->coded_width, enc->coded_height);

            if (enc->sample_aspect_ratio.num) {
                av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
                          enc->width * (int64_t)enc->sample_aspect_ratio.num,
                          enc->height * (int64_t)enc->sample_aspect_ratio.den,
                          1024 * 1024);
                snprintf(buf + strlen(buf), buf_size - strlen(buf),
                         " [SAR %d:%d DAR %d:%d]",
                         enc->sample_aspect_ratio.num, enc->sample_aspect_ratio.den,
                         display_aspect_ratio.num, display_aspect_ratio.den);
            }
            if (av_log_get_level() >= AV_LOG_DEBUG) {
                int g = av_gcd(enc->time_base.num, enc->time_base.den);
                snprintf(buf + strlen(buf), buf_size - strlen(buf),
                         ", %d/%d",
                         enc->time_base.num / g, enc->time_base.den / g);
            }
        }
        if (encode) {
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
                     ", q=%d-%d", enc->qmin, enc->qmax);
        } else {
            if (enc->properties & FF_CODEC_PROPERTY_CLOSED_CAPTIONS)
                snprintf(buf + strlen(buf), buf_size - strlen(buf),
                         ", Closed Captions");
            if (enc->properties & FF_CODEC_PROPERTY_LOSSLESS)
                snprintf(buf + strlen(buf), buf_size - strlen(buf),
                         ", lossless");
        }
        break;
    case AVMEDIA_TYPE_AUDIO:
        av_strlcat(buf, separator, buf_size);

        if (enc->sample_rate) {
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
                     "%d Hz, ", enc->sample_rate);
        }
        av_get_channel_layout_string(buf + strlen(buf), buf_size - strlen(buf), enc->channels, enc->channel_layout);
        if (enc->sample_fmt != AV_SAMPLE_FMT_NONE) {
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
                     ", %s", av_get_sample_fmt_name(enc->sample_fmt));
        }
        if (   enc->bits_per_raw_sample > 0
            && enc->bits_per_raw_sample != av_get_bytes_per_sample(enc->sample_fmt) * 8)
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
                     " (%d bit)", enc->bits_per_raw_sample);
        if (av_log_get_level() >= AV_LOG_VERBOSE) {
            if (enc->initial_padding)
                snprintf(buf + strlen(buf), buf_size - strlen(buf),
                         ", delay %d", enc->initial_padding);
            if (enc->trailing_padding)
                snprintf(buf + strlen(buf), buf_size - strlen(buf),
                         ", padding %d", enc->trailing_padding);
        }
        break;
    case AVMEDIA_TYPE_DATA:
        if (av_log_get_level() >= AV_LOG_DEBUG) {
            int g = av_gcd(enc->time_base.num, enc->time_base.den);
            if (g)
                snprintf(buf + strlen(buf), buf_size - strlen(buf),
                         ", %d/%d",
                         enc->time_base.num / g, enc->time_base.den / g);
        }
        break;
    case AVMEDIA_TYPE_SUBTITLE:
        if (enc->width)
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
                     ", %dx%d", enc->width, enc->height);
        break;
    default:
        return;
    }
    if (encode) {
        if (enc->flags & AV_CODEC_FLAG_PASS1)
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
                     ", pass 1");
        if (enc->flags & AV_CODEC_FLAG_PASS2)
            snprintf(buf + strlen(buf), buf_size - strlen(buf),
                     ", pass 2");
    }
    bitrate = get_bit_rate(enc);
    if (bitrate != 0) {
        snprintf(buf + st…