/*

 * 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

 * Options definition for AVCodecContext.

 */

#include "config_components.h"

#include "avcodec.h"

#include "avcodec_internal.h"

#include "codec_internal.h"

#include "libavutil/avassert.h"

#include "libavutil/internal.h"

#include "libavutil/mem.h"

#include "libavutil/opt.h"

#include <string.h>

FF_DISABLE_DEPRECATION_WARNINGS

#include "options_table.h"

FF_ENABLE_DEPRECATION_WARNINGS

static const char* context_to_name(void* ptr) {

    AVCodecContext *avc= ptr;

    if (avc && avc->codec)

        return avc->codec->name;

    else

        return "NULL";

}

static void *codec_child_next(void *obj, void *prev)

{

    AVCodecContext *s = obj;

    if (!prev && s->codec && s->codec->priv_class && s->priv_data)

        return s->priv_data;

    return NULL;

}

static const AVClass *codec_child_class_iterate(void **iter)

{

    const AVCodec *c;

    /* find next codec with priv options */

    while (c = av_codec_iterate(iter))

        if (c->priv_class)

            return c->priv_class;

    return NULL;

}

static AVClassCategory get_category(void *ptr)

{

    AVCodecContext* avctx = ptr;

    if (avctx->codec && ff_codec_is_decoder(avctx->codec))

        return AV_CLASS_CATEGORY_DECODER;

    else

        return AV_CLASS_CATEGORY_ENCODER;

}

static const AVClass av_codec_context_class = {

    .class_name              = "AVCodecContext",

    .item_name               = context_to_name,

    .option                  = avcodec_options,

    .version                 = LIBAVUTIL_VERSION_INT,

    .log_level_offset_offset = offsetof(AVCodecContext, log_level_offset),

    .child_next              = codec_child_next,

    .child_class_iterate     = codec_child_class_iterate,

    .category                = AV_CLASS_CATEGORY_ENCODER,

    .get_category            = get_category,

};

static int init_context_defaults(AVCodecContext *s, const AVCodec *codec)

{

    const FFCodec *const codec2 = ffcodec(codec);

    int flags=0;

    memset(s, 0, sizeof(AVCodecContext));

    s->av_class = &av_codec_context_class;

    s->codec_type = codec ? codec->type : AVMEDIA_TYPE_UNKNOWN;

    if (codec) {

        s->codec = codec;

        s->codec_id = codec->id;

    }

    if(s->codec_type == AVMEDIA_TYPE_AUDIO)

        flags= AV_OPT_FLAG_AUDIO_PARAM;

    else if(s->codec_type == AVMEDIA_TYPE_VIDEO)

        flags= AV_OPT_FLAG_VIDEO_PARAM;

    else if(s->codec_type == AVMEDIA_TYPE_SUBTITLE)

        flags= AV_OPT_FLAG_SUBTITLE_PARAM;

    av_opt_set_defaults2(s, flags, flags);

    av_channel_layout_uninit(&s->ch_layout);

    s->time_base           = (AVRational){0,1};

    s->framerate           = (AVRational){ 0, 1 };

    s->pkt_timebase        = (AVRational){ 0, 1 };

    s->get_buffer2         = avcodec_default_get_buffer2;

    s->get_format          = avcodec_default_get_format;

    s->get_encode_buffer   = avcodec_default_get_encode_buffer;

    s->execute             = avcodec_default_execute;

    s->execute2            = avcodec_default_execute2;

    s->sample_aspect_ratio = (AVRational){0,1};

    s->ch_layout.order     = AV_CHANNEL_ORDER_UNSPEC;

    s->pix_fmt             = AV_PIX_FMT_NONE;

    s->sw_pix_fmt          = AV_PIX_FMT_NONE;

    s->sample_fmt          = AV_SAMPLE_FMT_NONE;

    if(codec && codec2->priv_data_size){

        s->priv_data = av_mallocz(codec2->priv_data_size);

        if (!s->priv_data)

            return AVERROR(ENOMEM);

        if(codec->priv_class){

            *(const AVClass**)s->priv_data = codec->priv_class;

            av_opt_set_defaults(s->priv_data);

        }

    }

    if (codec && codec2->defaults) {

        int ret;

        const FFCodecDefault *d = codec2->defaults;

        while (d->key) {

            ret = av_opt_set(s, d->key, d->value, 0);

            av_assert0(ret >= 0);

            d++;

        }

    }

    return 0;

}

AVCodecContext *avcodec_alloc_context3(const AVCodec *codec)

{

    AVCodecContext *avctx= av_malloc(sizeof(AVCodecContext));

    if (!avctx)

        return NULL;

    if (init_context_defaults(avctx, codec) < 0) {

        av_free(avctx);

        return NULL;

    }

    return avctx;

}

void avcodec_free_context(AVCodecContext **pavctx)

{

    AVCodecContext *avctx = *pavctx;

    if (!avctx)

        return;

    ff_codec_close(avctx);

    av_freep(&avctx->extradata);

    av_freep(&avctx->subtitle_header);

    av_freep(&avctx->intra_matrix);

    av_freep(&avctx->chroma_intra_matrix);

    av_freep(&avctx->inter_matrix);

    av_freep(&avctx->rc_override);

    av_channel_layout_uninit(&avctx->ch_layout);

    av_freep(pavctx);

}

const AVClass *avcodec_get_class(void)

{

    return &av_codec_context_class;

}

#define SROFFSET(x) offsetof(AVSubtitleRect,x)

static const AVOption subtitle_rect_options[]={

{"x", "", SROFFSET(x), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0},

{"y", "", SROFFSET(y), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0},

{"w", "", SROFFSET(w), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0},

{"h", "", SROFFSET(h), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0},

{"type", "", SROFFSET(type), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0},

{"flags", "", SROFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, 0, 1, 0, .unit = "flags"},

{"forced", "", SROFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, 0, 1, 0},

{NULL},

};

static const AVClass av_subtitle_rect_class = {

    .class_name             = "AVSubtitleRect",

    .item_name              = NULL,

    .option                 = subtitle_rect_options,

    .version                = LIBAVUTIL_VERSION_INT,

};

const AVClass *avcodec_get_subtitle_rect_class(void)

{

    return &av_subtitle_rect_class;

}