ref: 75e88fab368c21cc0089222e5e08c9a15b369885
dir: /include/dav1d/picture.h/
/*
* Copyright © 2018, VideoLAN and dav1d authors
* Copyright © 2018, Two Orioles, LLC
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef DAV1D_PICTURE_H
#define DAV1D_PICTURE_H
#include <stddef.h>
#include <stdint.h>
#include "common.h"
#include "headers.h"
/* Number of bytes to align AND pad picture memory buffers by, so that SIMD
* implementations can over-read by a few bytes, and use aligned read/write
* instructions. */
#define DAV1D_PICTURE_ALIGNMENT 32
typedef struct Dav1dPictureParameters {
int w; ///< width (in pixels)
int h; ///< height (in pixels)
enum Dav1dPixelLayout layout; ///< format of the picture
int bpc; ///< bits per pixel component (8 or 10)
} Dav1dPictureParameters;
typedef struct Dav1dPicture {
Dav1dSequenceHeader *seq_hdr;
Dav1dFrameHeader *frame_hdr;
/**
* Pointers to planar image data (Y is [0], U is [1], V is [2]). The data
* should be bytes (for 8 bpc) or words (for 10 bpc). In case of words
* containing 10 bpc image data, the pixels should be located in the LSB
* bits, so that values range between [0, 1023]; the upper bits should be
* zero'ed out.
*/
void *data[3];
/**
* Number of bytes between 2 lines in data[] for luma [0] or chroma [1].
*/
ptrdiff_t stride[2];
Dav1dPictureParameters p;
Dav1dDataProps m;
/**
* High Dynamic Range Content Light Level metadata applying to this picture,
* as defined in section 5.8.3 and 6.7.3
*/
Dav1dContentLightLevel *content_light;
/**
* High Dynamic Range Mastering Display Color Volume metadata applying to
* this picture, as defined in section 5.8.4 and 6.7.4
*/
Dav1dMasteringDisplay *mastering_display;
struct Dav1dRef *frame_hdr_ref, *seq_hdr_ref; ///< Frame parameter allocation origins
struct Dav1dRef *content_light_ref, *mastering_display_ref; ///< Metadata allocation origins
struct Dav1dRef *ref; ///< Frame data allocation origin
void *allocator_data; ///< pointer managed by the allocator
} Dav1dPicture;
typedef struct Dav1dPicAllocator {
void *cookie; ///< custom data to pass to the allocator callbacks.
/**
* Allocate the picture buffer based on the Dav1dPictureParameters.
*
* The data[0], data[1] and data[2] must be DAV1D_PICTURE_ALIGNMENT byte
* aligned and with a pixel width/height multiple of 128 pixels. Any
* allocated memory area should also be padded by DAV1D_PICTURE_ALIGNMENT
* bytes.
* data[1] and data[2] must share the same stride[1].
*
* This function will be called on the main thread (the thread which calls
* dav1d_get_picture()).
*
* @param pic The picture to allocate the buffer for. The callback needs to
* fill the picture data[0], data[1], data[2], stride[0] and
* stride[1].
* The allocator can fill the pic allocator_data pointer with
* a custom pointer that will be passed to
* release_picture_callback().
* @param cookie Custom pointer passed to all calls.
*
* @note No fields other than data, stride and allocator_data must be filled
* by this callback.
* @return 0 on success. A negative errno value on error.
*/
int (*alloc_picture_callback)(Dav1dPicture *pic, void *cookie);
/**
* Release the picture buffer.
*
* If frame threading is used, this function may be called by the main
* thread (the thread which calls dav1d_get_picture()) or any of the frame
* threads and thus must be thread-safe. If frame threading is not used,
* this function will only be called on the main thread.
*
* @param pic The picture that was filled by alloc_picture_callback().
* @param cookie Custom pointer passed to all calls.
*/
void (*release_picture_callback)(Dav1dPicture *pic, void *cookie);
} Dav1dPicAllocator;
/**
* Release reference to a picture.
*/
DAV1D_API void dav1d_picture_unref(Dav1dPicture *p);
#endif /* DAV1D_PICTURE_H */