1/*
2 *  Copyright (c) 2013 The WebM project authors. All Rights Reserved.
3 *
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.
9 */
10#ifndef VP9_VP9_IFACE_COMMON_H_
11#define VP9_VP9_IFACE_COMMON_H_
12
13static void yuvconfig2image(vpx_image_t *img, const YV12_BUFFER_CONFIG  *yv12,
14                            void *user_priv) {
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;
21  int bps;
22  if (!ss_y) {
23    if (!ss_x) {
24      img->fmt = VPX_IMG_FMT_I444;
25      bps = 24;
26    } else {
27      img->fmt = VPX_IMG_FMT_I422;
28      bps = 16;
29    }
30  } else {
31    img->fmt = VPX_IMG_FMT_I420;
32    bps = 12;
33  }
34  img->bit_depth = 8;
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  img->bps = bps;
50  img->user_priv = user_priv;
51  img->img_data = yv12->buffer_alloc;
52  img->img_data_owner = 0;
53  img->self_allocd = 0;
54}
55
56static vpx_codec_err_t image2yuvconfig(const vpx_image_t *img,
57                                       YV12_BUFFER_CONFIG *yv12) {
58  yv12->y_buffer = img->planes[VPX_PLANE_Y];
59  yv12->u_buffer = img->planes[VPX_PLANE_U];
60  yv12->v_buffer = img->planes[VPX_PLANE_V];
61
62  yv12->y_crop_width  = img->d_w;
63  yv12->y_crop_height = img->d_h;
64  yv12->y_width  = img->d_w;
65  yv12->y_height = img->d_h;
66
67  yv12->uv_width = img->x_chroma_shift == 1 ? (1 + yv12->y_width) / 2
68                                            : yv12->y_width;
69  yv12->uv_height = img->y_chroma_shift == 1 ? (1 + yv12->y_height) / 2
70                                             : yv12->y_height;
71
72  yv12->y_stride = img->stride[VPX_PLANE_Y];
73  yv12->uv_stride = img->stride[VPX_PLANE_U];
74
75  yv12->border  = (img->stride[VPX_PLANE_Y] - img->w) / 2;
76  return VPX_CODEC_OK;
77}
78
79#endif  // VP9_VP9_IFACE_COMMON_H_
80