/* 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 64
typedefstruct 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;
/** * 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; /** * Array of ITU-T T.35 metadata as defined in section 5.8.2 and 6.7.2
*/
Dav1dITUTT35 *itut_t35;
/** * Number of ITU-T T35 metadata entries in the array
*/
size_t n_itut_t35;
uintptr_t reserved[4]; ///< reserved for future use
void *allocator_data; ///< pointer managed by the allocator
} Dav1dPicture;
typedefstruct 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 DAV1D_ERR 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);
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