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243 lines
11 KiB
C
243 lines
11 KiB
C
/*
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* Copyright (c) 2010 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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/*!\file
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* \brief Describes the vpx image descriptor and associated operations
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*
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*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifndef VPX_IMAGE_H
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#define VPX_IMAGE_H
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/*!\brief Current ABI version number
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*
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* \internal
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* If this file is altered in any way that changes the ABI, this value
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* must be bumped. Examples include, but are not limited to, changing
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* types, removing or reassigning enums, adding/removing/rearranging
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* fields to structures
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*/
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#define VPX_IMAGE_ABI_VERSION (1) /**<\hideinitializer*/
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#define VPX_IMG_FMT_PLANAR 0x100 /**< Image is a planar format */
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#define VPX_IMG_FMT_UV_FLIP 0x200 /**< V plane precedes U plane in memory */
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#define VPX_IMG_FMT_HAS_ALPHA 0x400 /**< Image has an alpha channel component */
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/*!\brief List of supported image formats */
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typedef enum vpx_img_fmt {
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VPX_IMG_FMT_NONE,
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VPX_IMG_FMT_RGB24, /**< 24 bit per pixel packed RGB */
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VPX_IMG_FMT_RGB32, /**< 32 bit per pixel packed 0RGB */
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VPX_IMG_FMT_RGB565, /**< 16 bit per pixel, 565 */
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VPX_IMG_FMT_RGB555, /**< 16 bit per pixel, 555 */
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VPX_IMG_FMT_UYVY, /**< UYVY packed YUV */
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VPX_IMG_FMT_YUY2, /**< YUYV packed YUV */
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VPX_IMG_FMT_YVYU, /**< YVYU packed YUV */
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VPX_IMG_FMT_BGR24, /**< 24 bit per pixel packed BGR */
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VPX_IMG_FMT_RGB32_LE, /**< 32 bit packed BGR0 */
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VPX_IMG_FMT_ARGB, /**< 32 bit packed ARGB, alpha=255 */
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VPX_IMG_FMT_ARGB_LE, /**< 32 bit packed BGRA, alpha=255 */
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VPX_IMG_FMT_RGB565_LE, /**< 16 bit per pixel, gggbbbbb rrrrrggg */
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VPX_IMG_FMT_RGB555_LE, /**< 16 bit per pixel, gggbbbbb 0rrrrrgg */
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VPX_IMG_FMT_YV12 = VPX_IMG_FMT_PLANAR | VPX_IMG_FMT_UV_FLIP | 1, /**< planar YVU */
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VPX_IMG_FMT_I420 = VPX_IMG_FMT_PLANAR | 2,
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VPX_IMG_FMT_VPXYV12 = VPX_IMG_FMT_PLANAR | VPX_IMG_FMT_UV_FLIP | 3, /** < planar 4:2:0 format with vpx color space */
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VPX_IMG_FMT_VPXI420 = VPX_IMG_FMT_PLANAR | 4 /** < planar 4:2:0 format with vpx color space */
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}
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vpx_img_fmt_t; /**< alias for enum vpx_img_fmt */
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#if !defined(VPX_CODEC_DISABLE_COMPAT) || !VPX_CODEC_DISABLE_COMPAT
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#define IMG_FMT_PLANAR VPX_IMG_FMT_PLANAR /**< \deprecated Use #VPX_IMG_FMT_PLANAR */
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#define IMG_FMT_UV_FLIP VPX_IMG_FMT_UV_FLIP /**< \deprecated Use #VPX_IMG_FMT_UV_FLIP */
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#define IMG_FMT_HAS_ALPHA VPX_IMG_FMT_HAS_ALPHA /**< \deprecated Use #VPX_IMG_FMT_HAS_ALPHA */
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/*!\brief Deprecated list of supported image formats
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* \deprecated New code should use #vpx_img_fmt
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*/
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#define img_fmt vpx_img_fmt
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/*!\brief alias for enum img_fmt.
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* \deprecated New code should use #vpx_img_fmt_t
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*/
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#define img_fmt_t vpx_img_fmt_t
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#define IMG_FMT_NONE VPX_IMG_FMT_NONE /**< \deprecated Use #VPX_IMG_FMT_NONE */
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#define IMG_FMT_RGB24 VPX_IMG_FMT_RGB24 /**< \deprecated Use #VPX_IMG_FMT_RGB24 */
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#define IMG_FMT_RGB32 VPX_IMG_FMT_RGB32 /**< \deprecated Use #VPX_IMG_FMT_RGB32 */
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#define IMG_FMT_RGB565 VPX_IMG_FMT_RGB565 /**< \deprecated Use #VPX_IMG_FMT_RGB565 */
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#define IMG_FMT_RGB555 VPX_IMG_FMT_RGB555 /**< \deprecated Use #VPX_IMG_FMT_RGB555 */
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#define IMG_FMT_UYVY VPX_IMG_FMT_UYVY /**< \deprecated Use #VPX_IMG_FMT_UYVY */
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#define IMG_FMT_YUY2 VPX_IMG_FMT_YUY2 /**< \deprecated Use #VPX_IMG_FMT_YUY2 */
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#define IMG_FMT_YVYU VPX_IMG_FMT_YVYU /**< \deprecated Use #VPX_IMG_FMT_YVYU */
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#define IMG_FMT_BGR24 VPX_IMG_FMT_BGR24 /**< \deprecated Use #VPX_IMG_FMT_BGR24 */
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#define IMG_FMT_RGB32_LE VPX_IMG_FMT_RGB32_LE /**< \deprecated Use #VPX_IMG_FMT_RGB32_LE */
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#define IMG_FMT_ARGB VPX_IMG_FMT_ARGB /**< \deprecated Use #VPX_IMG_FMT_ARGB */
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#define IMG_FMT_ARGB_LE VPX_IMG_FMT_ARGB_LE /**< \deprecated Use #VPX_IMG_FMT_ARGB_LE */
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#define IMG_FMT_RGB565_LE VPX_IMG_FMT_RGB565_LE /**< \deprecated Use #VPX_IMG_FMT_RGB565_LE */
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#define IMG_FMT_RGB555_LE VPX_IMG_FMT_RGB555_LE /**< \deprecated Use #VPX_IMG_FMT_RGB555_LE */
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#define IMG_FMT_YV12 VPX_IMG_FMT_YV12 /**< \deprecated Use #VPX_IMG_FMT_YV12 */
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#define IMG_FMT_I420 VPX_IMG_FMT_I420 /**< \deprecated Use #VPX_IMG_FMT_I420 */
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#define IMG_FMT_VPXYV12 VPX_IMG_FMT_VPXYV12 /**< \deprecated Use #VPX_IMG_FMT_VPXYV12 */
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#define IMG_FMT_VPXI420 VPX_IMG_FMT_VPXI420 /**< \deprecated Use #VPX_IMG_FMT_VPXI420 */
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#endif /* VPX_CODEC_DISABLE_COMPAT */
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/**\brief Image Descriptor */
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typedef struct vpx_image
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{
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vpx_img_fmt_t fmt; /**< Image Format */
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/* Image storage dimensions */
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unsigned int w; /**< Stored image width */
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unsigned int h; /**< Stored image height */
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/* Image display dimensions */
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unsigned int d_w; /**< Displayed image width */
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unsigned int d_h; /**< Displayed image height */
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/* Chroma subsampling info */
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unsigned int x_chroma_shift; /**< subsampling order, X */
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unsigned int y_chroma_shift; /**< subsampling order, Y */
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/* Image data pointers. */
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#define VPX_PLANE_PACKED 0 /**< To be used for all packed formats */
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#define VPX_PLANE_Y 0 /**< Y (Luminance) plane */
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#define VPX_PLANE_U 1 /**< U (Chroma) plane */
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#define VPX_PLANE_V 2 /**< V (Chroma) plane */
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#define VPX_PLANE_ALPHA 3 /**< A (Transparency) plane */
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#if !defined(VPX_CODEC_DISABLE_COMPAT) || !VPX_CODEC_DISABLE_COMPAT
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#define PLANE_PACKED VPX_PLANE_PACKED
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#define PLANE_Y VPX_PLANE_Y
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#define PLANE_U VPX_PLANE_U
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#define PLANE_V VPX_PLANE_V
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#define PLANE_ALPHA VPX_PLANE_ALPHA
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#endif
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unsigned char *planes[4]; /**< pointer to the top left pixel for each plane */
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int stride[4]; /**< stride between rows for each plane */
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int bps; /**< bits per sample (for packed formats) */
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/* The following member may be set by the application to associate data
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* with this image.
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*/
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void *user_priv; /**< may be set by the application to associate data
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* with this image. */
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/* The following members should be treated as private. */
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unsigned char *img_data; /**< private */
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int img_data_owner; /**< private */
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int self_allocd; /**< private */
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} vpx_image_t; /**< alias for struct vpx_image */
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/**\brief Representation of a rectangle on a surface */
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typedef struct vpx_image_rect
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{
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unsigned int x; /**< leftmost column */
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unsigned int y; /**< topmost row */
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unsigned int w; /**< width */
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unsigned int h; /**< height */
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} vpx_image_rect_t; /**< alias for struct vpx_image_rect */
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/*!\brief Open a descriptor, allocating storage for the underlying image
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*
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* Returns a descriptor for storing an image of the given format. The
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* storage for the descriptor is allocated on the heap.
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*
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* \param[in] img Pointer to storage for descriptor. If this parameter
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* is NULL, the storage for the descriptor will be
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* allocated on the heap.
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* \param[in] fmt Format for the image
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* \param[in] d_w Width of the image
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* \param[in] d_h Height of the image
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* \param[in] align Alignment, in bytes, of the image buffer and
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* each row in the image(stride).
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*
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* \return Returns a pointer to the initialized image descriptor. If the img
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* parameter is non-null, the value of the img parameter will be
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* returned.
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*/
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vpx_image_t *vpx_img_alloc(vpx_image_t *img,
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vpx_img_fmt_t fmt,
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unsigned int d_w,
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unsigned int d_h,
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unsigned int align);
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/*!\brief Open a descriptor, using existing storage for the underlying image
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*
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* Returns a descriptor for storing an image of the given format. The
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* storage for descriptor has been allocated elsewhere, and a descriptor is
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* desired to "wrap" that storage.
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*
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* \param[in] img Pointer to storage for descriptor. If this parameter
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* is NULL, the storage for the descriptor will be
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* allocated on the heap.
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* \param[in] fmt Format for the image
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* \param[in] d_w Width of the image
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* \param[in] d_h Height of the image
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* \param[in] align Alignment, in bytes, of each row in the image.
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* \param[in] img_data Storage to use for the image
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*
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* \return Returns a pointer to the initialized image descriptor. If the img
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* parameter is non-null, the value of the img parameter will be
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* returned.
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*/
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vpx_image_t *vpx_img_wrap(vpx_image_t *img,
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vpx_img_fmt_t fmt,
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unsigned int d_w,
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unsigned int d_h,
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unsigned int align,
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unsigned char *img_data);
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/*!\brief Set the rectangle identifying the displayed portion of the image
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*
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* Updates the displayed rectangle (aka viewport) on the image surface to
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* match the specified coordinates and size.
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*
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* \param[in] img Image descriptor
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* \param[in] x leftmost column
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* \param[in] y topmost row
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* \param[in] w width
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* \param[in] h height
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*
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* \return 0 if the requested rectangle is valid, nonzero otherwise.
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*/
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int vpx_img_set_rect(vpx_image_t *img,
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unsigned int x,
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unsigned int y,
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unsigned int w,
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unsigned int h);
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/*!\brief Flip the image vertically (top for bottom)
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*
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* Adjusts the image descriptor's pointers and strides to make the image
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* be referenced upside-down.
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*
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* \param[in] img Image descriptor
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*/
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void vpx_img_flip(vpx_image_t *img);
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/*!\brief Close an image descriptor
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*
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* Frees all allocated storage associated with an image descriptor.
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*
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* \param[in] img Image descriptor
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*/
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void vpx_img_free(vpx_image_t *img);
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#endif
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#ifdef __cplusplus
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}
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#endif
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