The Tor Browser / file comparison
comparison: media/libvpx/vpx_scale/generic/yv12config.c
media/libvpx/vpx_scale/generic/yv12config.c
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- TOR_BUG_9701
- changeset 10
- ac0c01689b40
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| -1:000000000000 | 0:e284ea552dac |
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| 1 /* | |
| 2 * Copyright (c) 2010 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 | |
| 11 #include "./vpx_config.h" | |
| 12 #include "vpx_scale/yv12config.h" | |
| 13 #include "vpx_mem/vpx_mem.h" | |
| 14 | |
| 15 /**************************************************************************** | |
| 16 * Exports | |
| 17 ****************************************************************************/ | |
| 18 | |
| 19 /**************************************************************************** | |
| 20 * | |
| 21 ****************************************************************************/ | |
| 22 int | |
| 23 vp8_yv12_de_alloc_frame_buffer(YV12_BUFFER_CONFIG *ybf) { | |
| 24 if (ybf) { | |
| 25 vpx_free(ybf->buffer_alloc); | |
| 26 | |
| 27 /* buffer_alloc isn't accessed by most functions. Rather y_buffer, | |
| 28 u_buffer and v_buffer point to buffer_alloc and are used. Clear out | |
| 29 all of this so that a freed pointer isn't inadvertently used */ | |
| 30 vpx_memset(ybf, 0, sizeof(YV12_BUFFER_CONFIG)); | |
| 31 } else { | |
| 32 return -1; | |
| 33 } | |
| 34 | |
| 35 return 0; | |
| 36 } | |
| 37 | |
| 38 int vp8_yv12_realloc_frame_buffer(YV12_BUFFER_CONFIG *ybf, | |
| 39 int width, int height, int border) { | |
| 40 if (ybf) { | |
| 41 int aligned_width = (width + 15) & ~15; | |
| 42 int aligned_height = (height + 15) & ~15; | |
| 43 int y_stride = ((aligned_width + 2 * border) + 31) & ~31; | |
| 44 int yplane_size = (aligned_height + 2 * border) * y_stride; | |
| 45 int uv_width = aligned_width >> 1; | |
| 46 int uv_height = aligned_height >> 1; | |
| 47 /** There is currently a bunch of code which assumes | |
| 48 * uv_stride == y_stride/2, so enforce this here. */ | |
| 49 int uv_stride = y_stride >> 1; | |
| 50 int uvplane_size = (uv_height + border) * uv_stride; | |
| 51 const int frame_size = yplane_size + 2 * uvplane_size; | |
| 52 | |
| 53 if (!ybf->buffer_alloc) { | |
| 54 ybf->buffer_alloc = vpx_memalign(32, frame_size); | |
| 55 ybf->buffer_alloc_sz = frame_size; | |
| 56 } | |
| 57 | |
| 58 if (!ybf->buffer_alloc || ybf->buffer_alloc_sz < frame_size) | |
| 59 return -1; | |
| 60 | |
| 61 /* Only support allocating buffers that have a border that's a multiple | |
| 62 * of 32. The border restriction is required to get 16-byte alignment of | |
| 63 * the start of the chroma rows without introducing an arbitrary gap | |
| 64 * between planes, which would break the semantics of things like | |
| 65 * vpx_img_set_rect(). */ | |
| 66 if (border & 0x1f) | |
| 67 return -3; | |
| 68 | |
| 69 ybf->y_crop_width = width; | |
| 70 ybf->y_crop_height = height; | |
| 71 ybf->y_width = aligned_width; | |
| 72 ybf->y_height = aligned_height; | |
| 73 ybf->y_stride = y_stride; | |
| 74 | |
| 75 ybf->uv_width = uv_width; | |
| 76 ybf->uv_height = uv_height; | |
| 77 ybf->uv_stride = uv_stride; | |
| 78 | |
| 79 ybf->alpha_width = 0; | |
| 80 ybf->alpha_height = 0; | |
| 81 ybf->alpha_stride = 0; | |
| 82 | |
| 83 ybf->border = border; | |
| 84 ybf->frame_size = frame_size; | |
| 85 | |
| 86 ybf->y_buffer = ybf->buffer_alloc + (border * y_stride) + border; | |
| 87 ybf->u_buffer = ybf->buffer_alloc + yplane_size + (border / 2 * uv_stride) + border / 2; | |
| 88 ybf->v_buffer = ybf->buffer_alloc + yplane_size + uvplane_size + (border / 2 * uv_stride) + border / 2; | |
| 89 ybf->alpha_buffer = NULL; | |
| 90 | |
| 91 ybf->corrupted = 0; /* assume not currupted by errors */ | |
| 92 return 0; | |
| 93 } | |
| 94 return -2; | |
| 95 } | |
| 96 | |
| 97 int vp8_yv12_alloc_frame_buffer(YV12_BUFFER_CONFIG *ybf, | |
| 98 int width, int height, int border) { | |
| 99 if (ybf) { | |
| 100 vp8_yv12_de_alloc_frame_buffer(ybf); | |
| 101 return vp8_yv12_realloc_frame_buffer(ybf, width, height, border); | |
| 102 } | |
| 103 return -2; | |
| 104 } | |
| 105 | |
| 106 #if CONFIG_VP9 | |
| 107 // TODO(jkoleszar): Maybe replace this with struct vpx_image | |
| 108 | |
| 109 int vp9_free_frame_buffer(YV12_BUFFER_CONFIG *ybf) { | |
| 110 if (ybf) { | |
| 111 vpx_free(ybf->buffer_alloc); | |
| 112 | |
| 113 /* buffer_alloc isn't accessed by most functions. Rather y_buffer, | |
| 114 u_buffer and v_buffer point to buffer_alloc and are used. Clear out | |
| 115 all of this so that a freed pointer isn't inadvertently used */ | |
| 116 vpx_memset(ybf, 0, sizeof(YV12_BUFFER_CONFIG)); | |
| 117 } else { | |
| 118 return -1; | |
| 119 } | |
| 120 | |
| 121 return 0; | |
| 122 } | |
| 123 | |
| 124 int vp9_realloc_frame_buffer(YV12_BUFFER_CONFIG *ybf, | |
| 125 int width, int height, | |
| 126 int ss_x, int ss_y, int border) { | |
| 127 if (ybf) { | |
| 128 const int aligned_width = (width + 7) & ~7; | |
| 129 const int aligned_height = (height + 7) & ~7; | |
| 130 const int y_stride = ((aligned_width + 2 * border) + 31) & ~31; | |
| 131 const int yplane_size = (aligned_height + 2 * border) * y_stride; | |
| 132 const int uv_width = aligned_width >> ss_x; | |
| 133 const int uv_height = aligned_height >> ss_y; | |
| 134 const int uv_stride = y_stride >> ss_x; | |
| 135 const int uv_border_w = border >> ss_x; | |
| 136 const int uv_border_h = border >> ss_y; | |
| 137 const int uvplane_size = (uv_height + 2 * uv_border_h) * uv_stride; | |
| 138 #if CONFIG_ALPHA | |
| 139 const int alpha_width = aligned_width; | |
| 140 const int alpha_height = aligned_height; | |
| 141 const int alpha_stride = y_stride; | |
| 142 const int alpha_border_w = border; | |
| 143 const int alpha_border_h = border; | |
| 144 const int alpha_plane_size = (alpha_height + 2 * alpha_border_h) * | |
| 145 alpha_stride; | |
| 146 const int frame_size = yplane_size + 2 * uvplane_size + | |
| 147 alpha_plane_size; | |
| 148 #else | |
| 149 const int frame_size = yplane_size + 2 * uvplane_size; | |
| 150 #endif | |
| 151 if (frame_size > ybf->buffer_alloc_sz) { | |
| 152 // Allocation to hold larger frame, or first allocation. | |
| 153 if (ybf->buffer_alloc) | |
| 154 vpx_free(ybf->buffer_alloc); | |
| 155 ybf->buffer_alloc = vpx_memalign(32, frame_size); | |
| 156 ybf->buffer_alloc_sz = frame_size; | |
| 157 } | |
| 158 | |
| 159 if (!ybf->buffer_alloc || ybf->buffer_alloc_sz < frame_size) | |
| 160 return -1; | |
| 161 | |
| 162 /* Only support allocating buffers that have a border that's a multiple | |
| 163 * of 32. The border restriction is required to get 16-byte alignment of | |
| 164 * the start of the chroma rows without introducing an arbitrary gap | |
| 165 * between planes, which would break the semantics of things like | |
| 166 * vpx_img_set_rect(). */ | |
| 167 if (border & 0x1f) | |
| 168 return -3; | |
| 169 | |
| 170 ybf->y_crop_width = width; | |
| 171 ybf->y_crop_height = height; | |
| 172 ybf->y_width = aligned_width; | |
| 173 ybf->y_height = aligned_height; | |
| 174 ybf->y_stride = y_stride; | |
| 175 | |
| 176 ybf->uv_crop_width = (width + ss_x) >> ss_x; | |
| 177 ybf->uv_crop_height = (height + ss_y) >> ss_y; | |
| 178 ybf->uv_width = uv_width; | |
| 179 ybf->uv_height = uv_height; | |
| 180 ybf->uv_stride = uv_stride; | |
| 181 | |
| 182 ybf->border = border; | |
| 183 ybf->frame_size = frame_size; | |
| 184 | |
| 185 ybf->y_buffer = ybf->buffer_alloc + (border * y_stride) + border; | |
| 186 ybf->u_buffer = ybf->buffer_alloc + yplane_size + | |
| 187 (uv_border_h * uv_stride) + uv_border_w; | |
| 188 ybf->v_buffer = ybf->buffer_alloc + yplane_size + uvplane_size + | |
| 189 (uv_border_h * uv_stride) + uv_border_w; | |
| 190 | |
| 191 #if CONFIG_ALPHA | |
| 192 ybf->alpha_width = alpha_width; | |
| 193 ybf->alpha_height = alpha_height; | |
| 194 ybf->alpha_stride = alpha_stride; | |
| 195 ybf->alpha_buffer = ybf->buffer_alloc + yplane_size + 2 * uvplane_size + | |
| 196 (alpha_border_h * alpha_stride) + alpha_border_w; | |
| 197 #endif | |
| 198 ybf->corrupted = 0; /* assume not corrupted by errors */ | |
| 199 return 0; | |
| 200 } | |
| 201 return -2; | |
| 202 } | |
| 203 | |
| 204 int vp9_alloc_frame_buffer(YV12_BUFFER_CONFIG *ybf, | |
| 205 int width, int height, | |
| 206 int ss_x, int ss_y, int border) { | |
| 207 if (ybf) { | |
| 208 vp9_free_frame_buffer(ybf); | |
| 209 return vp9_realloc_frame_buffer(ybf, width, height, ss_x, ss_y, border); | |
| 210 } | |
| 211 return -2; | |
| 212 } | |
| 213 #endif |
