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https://github.com/FFmpeg/FFmpeg.git
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1044c09eca
Prevent potential divisions by 0 when using them immediately after allocation. Signed-off-by: James Almer <jamrial@gmail.com>
94 lines
3.0 KiB
C
94 lines
3.0 KiB
C
/**
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* Copyright (c) 2016 Neil Birkbeck <neil.birkbeck@gmail.com>
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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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#include <stddef.h>
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#include <stdint.h>
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#include <string.h>
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#include "mastering_display_metadata.h"
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#include "mem.h"
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static void get_defaults(AVMasteringDisplayMetadata *mastering)
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{
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for (int i = 0; i < 3; i++)
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for (int j = 0; j < 2; j++)
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mastering->display_primaries[i][j] = (AVRational) { 0, 1 };
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mastering->white_point[0] =
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mastering->white_point[1] =
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mastering->min_luminance =
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mastering->max_luminance = (AVRational) { 0, 1 };
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}
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AVMasteringDisplayMetadata *av_mastering_display_metadata_alloc(void)
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{
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return av_mastering_display_metadata_alloc_size(NULL);
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}
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AVMasteringDisplayMetadata *av_mastering_display_metadata_alloc_size(size_t *size)
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{
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AVMasteringDisplayMetadata *mastering = av_mallocz(sizeof(AVMasteringDisplayMetadata));
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if (!mastering)
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return NULL;
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get_defaults(mastering);
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if (size)
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*size = sizeof(*mastering);
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return mastering;
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}
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AVMasteringDisplayMetadata *av_mastering_display_metadata_create_side_data(AVFrame *frame)
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{
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AVFrameSideData *side_data = av_frame_new_side_data(frame,
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AV_FRAME_DATA_MASTERING_DISPLAY_METADATA,
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sizeof(AVMasteringDisplayMetadata));
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if (!side_data)
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return NULL;
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memset(side_data->data, 0, sizeof(AVMasteringDisplayMetadata));
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get_defaults((AVMasteringDisplayMetadata *)side_data->data);
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return (AVMasteringDisplayMetadata *)side_data->data;
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}
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AVContentLightMetadata *av_content_light_metadata_alloc(size_t *size)
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{
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AVContentLightMetadata *metadata = av_mallocz(sizeof(AVContentLightMetadata));
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if (size)
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*size = sizeof(*metadata);
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return metadata;
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}
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AVContentLightMetadata *av_content_light_metadata_create_side_data(AVFrame *frame)
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{
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AVFrameSideData *side_data = av_frame_new_side_data(frame,
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AV_FRAME_DATA_CONTENT_LIGHT_LEVEL,
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sizeof(AVContentLightMetadata));
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if (!side_data)
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return NULL;
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memset(side_data->data, 0, sizeof(AVContentLightMetadata));
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return (AVContentLightMetadata *)side_data->data;
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}
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