mirror of
https://github.com/FFmpeg/FFmpeg.git
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291 lines
9.3 KiB
C
291 lines
9.3 KiB
C
/*
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* Copyright (c) 2001 Fabrice Bellard
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* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* Options definition for AVCodecContext.
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*/
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#include "avcodec.h"
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#include "internal.h"
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#include "libavutil/avassert.h"
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#include "libavutil/opt.h"
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#include <float.h> /* FLT_MIN, FLT_MAX */
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#include "options_table.h"
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static const char* context_to_name(void* ptr) {
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AVCodecContext *avc= ptr;
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if(avc && avc->codec && avc->codec->name)
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return avc->codec->name;
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else
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return "NULL";
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}
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static void *codec_child_next(void *obj, void *prev)
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{
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AVCodecContext *s = obj;
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if (!prev && s->codec && s->codec->priv_class && s->priv_data)
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return s->priv_data;
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return NULL;
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}
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static const AVClass *codec_child_class_next(const AVClass *prev)
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{
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AVCodec *c = NULL;
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/* find the codec that corresponds to prev */
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while (prev && (c = av_codec_next(c)))
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if (c->priv_class == prev)
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break;
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/* find next codec with priv options */
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while (c = av_codec_next(c))
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if (c->priv_class)
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return c->priv_class;
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return NULL;
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}
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static AVClassCategory get_category(void *ptr)
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{
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AVCodecContext* avctx = ptr;
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if(avctx->codec && avctx->codec->decode) return AV_CLASS_CATEGORY_DECODER;
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else return AV_CLASS_CATEGORY_ENCODER;
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}
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static const AVClass av_codec_context_class = {
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.class_name = "AVCodecContext",
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.item_name = context_to_name,
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.option = options,
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.version = LIBAVUTIL_VERSION_INT,
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.log_level_offset_offset = offsetof(AVCodecContext, log_level_offset),
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.child_next = codec_child_next,
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.child_class_next = codec_child_class_next,
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.category = AV_CLASS_CATEGORY_ENCODER,
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.get_category = get_category,
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};
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#if FF_API_ALLOC_CONTEXT
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void avcodec_get_context_defaults2(AVCodecContext *s, enum AVMediaType codec_type){
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AVCodec c= {0};
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c.type= codec_type;
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avcodec_get_context_defaults3(s, &c);
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}
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#endif
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int avcodec_get_context_defaults3(AVCodecContext *s, AVCodec *codec){
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int flags=0;
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memset(s, 0, sizeof(AVCodecContext));
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s->av_class = &av_codec_context_class;
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s->codec_type = codec ? codec->type : AVMEDIA_TYPE_UNKNOWN;
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if(s->codec_type == AVMEDIA_TYPE_AUDIO)
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flags= AV_OPT_FLAG_AUDIO_PARAM;
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else if(s->codec_type == AVMEDIA_TYPE_VIDEO)
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flags= AV_OPT_FLAG_VIDEO_PARAM;
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else if(s->codec_type == AVMEDIA_TYPE_SUBTITLE)
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flags= AV_OPT_FLAG_SUBTITLE_PARAM;
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av_opt_set_defaults2(s, flags, flags);
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s->time_base = (AVRational){0,1};
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s->get_buffer = avcodec_default_get_buffer;
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s->release_buffer = avcodec_default_release_buffer;
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s->get_format = avcodec_default_get_format;
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s->execute = avcodec_default_execute;
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s->execute2 = avcodec_default_execute2;
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s->sample_aspect_ratio = (AVRational){0,1};
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s->pix_fmt = PIX_FMT_NONE;
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s->sample_fmt = AV_SAMPLE_FMT_NONE;
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s->timecode_frame_start = -1;
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s->reget_buffer = avcodec_default_reget_buffer;
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s->reordered_opaque = AV_NOPTS_VALUE;
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if(codec && codec->priv_data_size){
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if(!s->priv_data){
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s->priv_data= av_mallocz(codec->priv_data_size);
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if (!s->priv_data) {
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return AVERROR(ENOMEM);
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}
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}
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if(codec->priv_class){
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*(const AVClass**)s->priv_data = codec->priv_class;
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av_opt_set_defaults(s->priv_data);
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}
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}
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if (codec && codec->defaults) {
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int ret;
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const AVCodecDefault *d = codec->defaults;
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while (d->key) {
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ret = av_opt_set(s, d->key, d->value, 0);
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av_assert0(ret >= 0);
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d++;
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}
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}
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return 0;
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}
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AVCodecContext *avcodec_alloc_context3(AVCodec *codec){
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AVCodecContext *avctx= av_malloc(sizeof(AVCodecContext));
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if(avctx==NULL) return NULL;
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if(avcodec_get_context_defaults3(avctx, codec) < 0){
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av_free(avctx);
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return NULL;
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}
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return avctx;
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}
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#if FF_API_ALLOC_CONTEXT
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AVCodecContext *avcodec_alloc_context2(enum AVMediaType codec_type){
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AVCodecContext *avctx= av_malloc(sizeof(AVCodecContext));
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if(avctx==NULL) return NULL;
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avcodec_get_context_defaults2(avctx, codec_type);
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return avctx;
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}
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void avcodec_get_context_defaults(AVCodecContext *s){
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avcodec_get_context_defaults2(s, AVMEDIA_TYPE_UNKNOWN);
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}
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AVCodecContext *avcodec_alloc_context(void){
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return avcodec_alloc_context2(AVMEDIA_TYPE_UNKNOWN);
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}
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#endif
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int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src)
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{
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if (avcodec_is_open(dest)) { // check that the dest context is uninitialized
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av_log(dest, AV_LOG_ERROR,
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"Tried to copy AVCodecContext %p into already-initialized %p\n",
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src, dest);
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return AVERROR(EINVAL);
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}
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memcpy(dest, src, sizeof(*dest));
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/* set values specific to opened codecs back to their default state */
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dest->priv_data = NULL;
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dest->codec = NULL;
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dest->slice_offset = NULL;
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dest->hwaccel = NULL;
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dest->thread_opaque = NULL;
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dest->internal = NULL;
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/* reallocate values that should be allocated separately */
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dest->rc_eq = NULL;
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dest->extradata = NULL;
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dest->intra_matrix = NULL;
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dest->inter_matrix = NULL;
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dest->rc_override = NULL;
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if (src->rc_eq) {
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dest->rc_eq = av_strdup(src->rc_eq);
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if (!dest->rc_eq)
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return AVERROR(ENOMEM);
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}
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#define alloc_and_copy_or_fail(obj, size, pad) \
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if (src->obj && size > 0) { \
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dest->obj = av_malloc(size + pad); \
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if (!dest->obj) \
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goto fail; \
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memcpy(dest->obj, src->obj, size); \
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if (pad) \
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memset(((uint8_t *) dest->obj) + size, 0, pad); \
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}
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alloc_and_copy_or_fail(extradata, src->extradata_size,
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FF_INPUT_BUFFER_PADDING_SIZE);
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alloc_and_copy_or_fail(intra_matrix, 64 * sizeof(int16_t), 0);
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alloc_and_copy_or_fail(inter_matrix, 64 * sizeof(int16_t), 0);
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alloc_and_copy_or_fail(rc_override, src->rc_override_count * sizeof(*src->rc_override), 0);
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#undef alloc_and_copy_or_fail
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return 0;
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fail:
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av_freep(&dest->rc_override);
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av_freep(&dest->intra_matrix);
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av_freep(&dest->inter_matrix);
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av_freep(&dest->extradata);
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av_freep(&dest->rc_eq);
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return AVERROR(ENOMEM);
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}
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const AVClass *avcodec_get_class(void)
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{
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return &av_codec_context_class;
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}
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#define FOFFSET(x) offsetof(AVFrame,x)
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static const AVOption frame_options[]={
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{"best_effort_timestamp", "", FOFFSET(best_effort_timestamp), AV_OPT_TYPE_INT64, {.dbl = AV_NOPTS_VALUE }, INT64_MIN, INT64_MAX, 0},
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{"pkt_pos", "", FOFFSET(pkt_pos), AV_OPT_TYPE_INT64, {.dbl = -1 }, INT64_MIN, INT64_MAX, 0},
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{"sample_aspect_ratio", "", FOFFSET(sample_aspect_ratio), AV_OPT_TYPE_RATIONAL, {.dbl = 0 }, 0, INT_MAX, 0},
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{"width", "", FOFFSET(width), AV_OPT_TYPE_INT, {.dbl = 0 }, 0, INT_MAX, 0},
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{"height", "", FOFFSET(height), AV_OPT_TYPE_INT, {.dbl = 0 }, 0, INT_MAX, 0},
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{"format", "", FOFFSET(format), AV_OPT_TYPE_INT, {.dbl = -1 }, 0, INT_MAX, 0},
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{"channel_layout", "", FOFFSET(channel_layout), AV_OPT_TYPE_INT64, {.dbl = 0 }, 0, INT64_MAX, 0},
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{"sample_rate", "", FOFFSET(sample_rate), AV_OPT_TYPE_INT, {.dbl = 0 }, 0, INT_MAX, 0},
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{NULL},
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};
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static const AVClass av_frame_class = {
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.class_name = "AVFrame",
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.item_name = NULL,
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.option = frame_options,
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.version = LIBAVUTIL_VERSION_INT,
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};
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const AVClass *avcodec_get_frame_class(void)
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{
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return &av_frame_class;
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}
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#define SROFFSET(x) offsetof(AVSubtitleRect,x)
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static const AVOption subtitle_rect_options[]={
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{"x", "", SROFFSET(x), AV_OPT_TYPE_INT, {.dbl = 0 }, 0, INT_MAX, 0},
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{"y", "", SROFFSET(y), AV_OPT_TYPE_INT, {.dbl = 0 }, 0, INT_MAX, 0},
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{"w", "", SROFFSET(w), AV_OPT_TYPE_INT, {.dbl = 0 }, 0, INT_MAX, 0},
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{"h", "", SROFFSET(h), AV_OPT_TYPE_INT, {.dbl = 0 }, 0, INT_MAX, 0},
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{"type", "", SROFFSET(type), AV_OPT_TYPE_INT, {.dbl = 0 }, 0, INT_MAX, 0},
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{"forced", "", SROFFSET(forced), AV_OPT_TYPE_INT, {.dbl = 0}, 0, 1, 0},
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{NULL},
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};
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static const AVClass av_subtitle_rect_class = {
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.class_name = "AVSubtitleRect",
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.item_name = NULL,
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.option = subtitle_rect_options,
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.version = LIBAVUTIL_VERSION_INT,
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};
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const AVClass *avcodec_get_subtitle_rect_class(void)
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{
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return &av_subtitle_rect_class;
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}
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