2 * Copyright (c) 2013 The WebM project authors. All Rights Reserved.
4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
10 #ifndef VP9_VP9_IFACE_COMMON_H_
11 #define VP9_VP9_IFACE_COMMON_H_
13 static void yuvconfig2image(vpx_image_t *img, const YV12_BUFFER_CONFIG *yv12,
15 /** vpx_img_wrap() doesn't allow specifying independent strides for
16 * the Y, U, and V planes, nor other alignment adjustments that
17 * might be representable by a YV12_BUFFER_CONFIG, so we just
18 * initialize all the fields.*/
19 const int ss_x = yv12->uv_crop_width < yv12->y_crop_width;
20 const int ss_y = yv12->uv_crop_height < yv12->y_crop_height;
24 img->fmt = VPX_IMG_FMT_I444;
27 img->fmt = VPX_IMG_FMT_I422;
31 img->fmt = VPX_IMG_FMT_I420;
35 img->w = yv12->y_stride;
36 img->h = ALIGN_POWER_OF_TWO(yv12->y_height + 2 * VP9_ENC_BORDER_IN_PIXELS, 3);
37 img->d_w = yv12->y_crop_width;
38 img->d_h = yv12->y_crop_height;
39 img->x_chroma_shift = ss_x;
40 img->y_chroma_shift = ss_y;
41 img->planes[VPX_PLANE_Y] = yv12->y_buffer;
42 img->planes[VPX_PLANE_U] = yv12->u_buffer;
43 img->planes[VPX_PLANE_V] = yv12->v_buffer;
44 img->planes[VPX_PLANE_ALPHA] = NULL;
45 img->stride[VPX_PLANE_Y] = yv12->y_stride;
46 img->stride[VPX_PLANE_U] = yv12->uv_stride;
47 img->stride[VPX_PLANE_V] = yv12->uv_stride;
48 img->stride[VPX_PLANE_ALPHA] = yv12->y_stride;
49 #if CONFIG_VP9_HIGHBITDEPTH
50 if (yv12->flags & YV12_FLAG_HIGHBITDEPTH) {
51 // vpx_image_t uses byte strides and a pointer to the first byte
53 img->fmt |= VPX_IMG_FMT_HIGHBITDEPTH;
54 img->bit_depth = yv12->bit_depth;
55 img->planes[VPX_PLANE_Y] = (uint8_t*)CONVERT_TO_SHORTPTR(yv12->y_buffer);
56 img->planes[VPX_PLANE_U] = (uint8_t*)CONVERT_TO_SHORTPTR(yv12->u_buffer);
57 img->planes[VPX_PLANE_V] = (uint8_t*)CONVERT_TO_SHORTPTR(yv12->v_buffer);
58 img->planes[VPX_PLANE_ALPHA] = NULL;
59 img->stride[VPX_PLANE_Y] = 2 * yv12->y_stride;
60 img->stride[VPX_PLANE_U] = 2 * yv12->uv_stride;
61 img->stride[VPX_PLANE_V] = 2 * yv12->uv_stride;
62 img->stride[VPX_PLANE_ALPHA] = 2 * yv12->y_stride;
64 #endif // CONFIG_VP9_HIGHBITDEPTH
66 img->user_priv = user_priv;
67 img->img_data = yv12->buffer_alloc;
68 img->img_data_owner = 0;
72 static vpx_codec_err_t image2yuvconfig(const vpx_image_t *img,
73 YV12_BUFFER_CONFIG *yv12) {
74 yv12->y_buffer = img->planes[VPX_PLANE_Y];
75 yv12->u_buffer = img->planes[VPX_PLANE_U];
76 yv12->v_buffer = img->planes[VPX_PLANE_V];
78 yv12->y_crop_width = img->d_w;
79 yv12->y_crop_height = img->d_h;
80 yv12->y_width = img->d_w;
81 yv12->y_height = img->d_h;
83 yv12->uv_width = img->x_chroma_shift == 1 ? (1 + yv12->y_width) / 2
85 yv12->uv_height = img->y_chroma_shift == 1 ? (1 + yv12->y_height) / 2
88 yv12->y_stride = img->stride[VPX_PLANE_Y];
89 yv12->uv_stride = img->stride[VPX_PLANE_U];
91 #if CONFIG_VP9_HIGHBITDEPTH
92 if (img->fmt & VPX_IMG_FMT_HIGHBITDEPTH) {
94 // planes point to uint8 address of start of data
95 // stride counts uint8s to reach next row
96 // In YV12_BUFFER_CONFIG
97 // y_buffer, u_buffer, v_buffer point to uint16 address of data
98 // stride and border counts in uint16s
99 // This means that all the address calculations in the main body of code
100 // should work correctly.
101 // However, before we do any pixel operations we need to cast the address
102 // to a uint16 ponter and double its value.
103 yv12->y_buffer = CONVERT_TO_BYTEPTR(yv12->y_buffer);
104 yv12->u_buffer = CONVERT_TO_BYTEPTR(yv12->u_buffer);
105 yv12->v_buffer = CONVERT_TO_BYTEPTR(yv12->v_buffer);
106 yv12->y_stride >>= 1;
107 yv12->uv_stride >>= 1;
108 yv12->flags = YV12_FLAG_HIGHBITDEPTH;
112 yv12->border = (yv12->y_stride - img->w) / 2;
114 yv12->border = (img->stride[VPX_PLANE_Y] - img->w) / 2;
115 #endif // CONFIG_VP9_HIGHBITDEPTH
117 yv12->border = (img->stride[VPX_PLANE_Y] - img->w) / 2;
121 #endif // VP9_VP9_IFACE_COMMON_H_