media/libvpx/vp9/vp9_iface_common.h@ac0c01689b40 (annotated)
media/libvpx/vp9/vp9_iface_common.h
Thu, 15 Jan 2015 15:59:08 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 15 Jan 2015 15:59:08 +0100
- branch
- TOR_BUG_9701
- changeset 10
- ac0c01689b40
- permissions
- -rw-r--r--
Implement a real Private Browsing Mode condition by changing the API/ABI;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
| michael@0 | 1 | /* |
| michael@0 | 2 | * Copyright (c) 2013 The WebM project authors. All Rights Reserved. |
| michael@0 | 3 | * |
| michael@0 | 4 | * Use of this source code is governed by a BSD-style license |
| michael@0 | 5 | * that can be found in the LICENSE file in the root of the source |
| michael@0 | 6 | * tree. An additional intellectual property rights grant can be found |
| michael@0 | 7 | * in the file PATENTS. All contributing project authors may |
| michael@0 | 8 | * be found in the AUTHORS file in the root of the source tree. |
| michael@0 | 9 | */ |
| michael@0 | 10 | #ifndef VP9_VP9_IFACE_COMMON_H_ |
| michael@0 | 11 | #define VP9_VP9_IFACE_COMMON_H_ |
| michael@0 | 12 | |
| michael@0 | 13 | static void yuvconfig2image(vpx_image_t *img, const YV12_BUFFER_CONFIG *yv12, |
| michael@0 | 14 | void *user_priv) { |
| michael@0 | 15 | /** vpx_img_wrap() doesn't allow specifying independent strides for |
| michael@0 | 16 | * the Y, U, and V planes, nor other alignment adjustments that |
| michael@0 | 17 | * might be representable by a YV12_BUFFER_CONFIG, so we just |
| michael@0 | 18 | * initialize all the fields.*/ |
| michael@0 | 19 | int bps = 12; |
| michael@0 | 20 | if (yv12->uv_height == yv12->y_height) { |
| michael@0 | 21 | if (yv12->uv_width == yv12->y_width) { |
| michael@0 | 22 | img->fmt = VPX_IMG_FMT_I444; |
| michael@0 | 23 | bps = 24; |
| michael@0 | 24 | } else { |
| michael@0 | 25 | img->fmt = VPX_IMG_FMT_I422; |
| michael@0 | 26 | bps = 16; |
| michael@0 | 27 | } |
| michael@0 | 28 | } else { |
| michael@0 | 29 | img->fmt = VPX_IMG_FMT_I420; |
| michael@0 | 30 | } |
| michael@0 | 31 | img->w = yv12->y_stride; |
| michael@0 | 32 | img->h = ALIGN_POWER_OF_TWO(yv12->y_height + 2 * VP9BORDERINPIXELS, 3); |
| michael@0 | 33 | img->d_w = yv12->y_crop_width; |
| michael@0 | 34 | img->d_h = yv12->y_crop_height; |
| michael@0 | 35 | img->x_chroma_shift = yv12->uv_width < yv12->y_width; |
| michael@0 | 36 | img->y_chroma_shift = yv12->uv_height < yv12->y_height; |
| michael@0 | 37 | img->planes[VPX_PLANE_Y] = yv12->y_buffer; |
| michael@0 | 38 | img->planes[VPX_PLANE_U] = yv12->u_buffer; |
| michael@0 | 39 | img->planes[VPX_PLANE_V] = yv12->v_buffer; |
| michael@0 | 40 | img->planes[VPX_PLANE_ALPHA] = yv12->alpha_buffer; |
| michael@0 | 41 | img->stride[VPX_PLANE_Y] = yv12->y_stride; |
| michael@0 | 42 | img->stride[VPX_PLANE_U] = yv12->uv_stride; |
| michael@0 | 43 | img->stride[VPX_PLANE_V] = yv12->uv_stride; |
| michael@0 | 44 | img->stride[VPX_PLANE_ALPHA] = yv12->alpha_stride; |
| michael@0 | 45 | img->bps = bps; |
| michael@0 | 46 | img->user_priv = user_priv; |
| michael@0 | 47 | img->img_data = yv12->buffer_alloc; |
| michael@0 | 48 | img->img_data_owner = 0; |
| michael@0 | 49 | img->self_allocd = 0; |
| michael@0 | 50 | } |
| michael@0 | 51 | |
| michael@0 | 52 | static vpx_codec_err_t image2yuvconfig(const vpx_image_t *img, |
| michael@0 | 53 | YV12_BUFFER_CONFIG *yv12) { |
| michael@0 | 54 | yv12->y_buffer = img->planes[VPX_PLANE_Y]; |
| michael@0 | 55 | yv12->u_buffer = img->planes[VPX_PLANE_U]; |
| michael@0 | 56 | yv12->v_buffer = img->planes[VPX_PLANE_V]; |
| michael@0 | 57 | yv12->alpha_buffer = img->planes[VPX_PLANE_ALPHA]; |
| michael@0 | 58 | |
| michael@0 | 59 | yv12->y_crop_width = img->d_w; |
| michael@0 | 60 | yv12->y_crop_height = img->d_h; |
| michael@0 | 61 | yv12->y_width = img->d_w; |
| michael@0 | 62 | yv12->y_height = img->d_h; |
| michael@0 | 63 | |
| michael@0 | 64 | yv12->uv_width = img->x_chroma_shift == 1 ? (1 + yv12->y_width) / 2 |
| michael@0 | 65 | : yv12->y_width; |
| michael@0 | 66 | yv12->uv_height = img->y_chroma_shift == 1 ? (1 + yv12->y_height) / 2 |
| michael@0 | 67 | : yv12->y_height; |
| michael@0 | 68 | |
| michael@0 | 69 | yv12->alpha_width = yv12->alpha_buffer ? img->d_w : 0; |
| michael@0 | 70 | yv12->alpha_height = yv12->alpha_buffer ? img->d_h : 0; |
| michael@0 | 71 | |
| michael@0 | 72 | yv12->y_stride = img->stride[VPX_PLANE_Y]; |
| michael@0 | 73 | yv12->uv_stride = img->stride[VPX_PLANE_U]; |
| michael@0 | 74 | yv12->alpha_stride = yv12->alpha_buffer ? img->stride[VPX_PLANE_ALPHA] : 0; |
| michael@0 | 75 | |
| michael@0 | 76 | yv12->border = (img->stride[VPX_PLANE_Y] - img->w) / 2; |
| michael@0 | 77 | #if CONFIG_ALPHA |
| michael@0 | 78 | // For development purposes, force alpha to hold the same data a Y for now. |
| michael@0 | 79 | yv12->alpha_buffer = yv12->y_buffer; |
| michael@0 | 80 | yv12->alpha_width = yv12->y_width; |
| michael@0 | 81 | yv12->alpha_height = yv12->y_height; |
| michael@0 | 82 | yv12->alpha_stride = yv12->y_stride; |
| michael@0 | 83 | #endif |
| michael@0 | 84 | return VPX_CODEC_OK; |
| michael@0 | 85 | } |
| michael@0 | 86 | |
| michael@0 | 87 | #endif // VP9_VP9_IFACE_COMMON_H_ |
