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/*
* Copyright (c) 2001 Fabrice Bellard
* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
*
* This file is part of Libav.
*
* Libav 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.
*
* Libav 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 Libav; 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 "avcodec.h"
#include "internal.h"
#include "libavutil/avassert.h"
#include "libavutil/internal.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include <float.h> /* FLT_MIN, FLT_MAX */
#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 && avc->codec->name)
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_next(const AVClass *prev)
{
AVCodec *c = NULL;
/* find the codec that corresponds to prev */
while (prev && (c = av_codec_next(c)))
if (c->priv_class == prev)
break;
/* find next codec with priv options */
while (c = av_codec_next(c))
if (c->priv_class)
return c->priv_class;
return NULL;
}
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_next = codec_child_class_next,
};
static int init_context_defaults(AVCodecContext *s, const AVCodec *codec)
{
memset(s, 0, sizeof(AVCodecContext));
s->av_class = &av_codec_context_class;
s->codec_type = codec ? codec->type : AVMEDIA_TYPE_UNKNOWN;
s->codec = codec;
av_opt_set_defaults(s);
s->time_base = (AVRational){0,1};
s->framerate = (AVRational){ 0, 1 };
s->get_buffer2 = avcodec_default_get_buffer2;
s->get_format = avcodec_default_get_format;
s->execute = avcodec_default_execute;
s->execute2 = avcodec_default_execute2;
s->sample_aspect_ratio = (AVRational){0,1};
s->pix_fmt = AV_PIX_FMT_NONE;
s->sample_fmt = AV_SAMPLE_FMT_NONE;
s->reordered_opaque = AV_NOPTS_VALUE;
if(codec && codec->priv_data_size){
if(!s->priv_data){
s->priv_data= av_mallocz(codec->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 && codec->defaults) {
int ret;
const AVCodecDefault *d = codec->defaults;
while (d->key) {
ret = av_opt_set(s, d->key, d->value, 0);
av_assert0(ret >= 0);
d++;
}
}
return 0;
}
#if FF_API_GET_CONTEXT_DEFAULTS
int avcodec_get_context_defaults3(AVCodecContext *s, const AVCodec *codec)
{
return init_context_defaults(s, codec);
}
#endif
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;
avcodec_close(avctx);
av_freep(&avctx->extradata);
av_freep(&avctx->subtitle_header);
av_freep(pavctx);
}
#if FF_API_COPY_CONTEXT
int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src)
{
const AVCodec *orig_codec = dest->codec;
uint8_t *orig_priv_data = dest->priv_data;
if (avcodec_is_open(dest)) { // check that the dest context is uninitialized
av_log(dest, AV_LOG_ERROR,
"Tried to copy AVCodecContext %p into already-initialized %p\n",
src, dest);
return AVERROR(EINVAL);
}
memcpy(dest, src, sizeof(*dest));
dest->priv_data = orig_priv_data;
dest->codec = orig_codec;
/* set values specific to opened codecs back to their default state */
dest->slice_offset = NULL;
dest->hwaccel = NULL;
dest->internal = NULL;
/* reallocate values that should be allocated separately */
dest->extradata = NULL;
dest->intra_matrix = NULL;
dest->inter_matrix = NULL;
dest->rc_override = NULL;
dest->subtitle_header = NULL;
#if FF_API_MPV_OPT
FF_DISABLE_DEPRECATION_WARNINGS
dest->rc_eq = NULL;
if (src->rc_eq) {
dest->rc_eq = av_strdup(src->rc_eq);
if (!dest->rc_eq)
return AVERROR(ENOMEM);
}
FF_ENABLE_DEPRECATION_WARNINGS
#endif
#define alloc_and_copy_or_fail(obj, size, pad) \
if (src->obj && size > 0) { \
dest->obj = av_malloc(size + pad); \
if (!dest->obj) \
goto fail; \
memcpy(dest->obj, src->obj, size); \
if (pad) \
memset(((uint8_t *) dest->obj) + size, 0, pad); \
}
alloc_and_copy_or_fail(extradata, src->extradata_size,
AV_INPUT_BUFFER_PADDING_SIZE);
alloc_and_copy_or_fail(intra_matrix, 64 * sizeof(int16_t), 0);
alloc_and_copy_or_fail(inter_matrix, 64 * sizeof(int16_t), 0);
alloc_and_copy_or_fail(rc_override, src->rc_override_count * sizeof(*src->rc_override), 0);
alloc_and_copy_or_fail(subtitle_header, src->subtitle_header_size, 0);
dest->subtitle_header_size = src->subtitle_header_size;
#undef alloc_and_copy_or_fail
return 0;
fail:
av_freep(&dest->rc_override);
av_freep(&dest->intra_matrix);
av_freep(&dest->inter_matrix);
av_freep(&dest->extradata);
#if FF_API_MPV_OPT
FF_DISABLE_DEPRECATION_WARNINGS
av_freep(&dest->rc_eq);
FF_ENABLE_DEPRECATION_WARNINGS
#endif
return AVERROR(ENOMEM);
}
#endif
const AVClass *avcodec_get_class(void)
{
return &av_codec_context_class;
}
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