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 <assert.h> 12 #include <limits.h> 13 14 #include "vpx_scale/yv12config.h" 15 #include "vpx_mem/vpx_mem.h" 16 #include "vpx_ports/mem.h" 17 18 /**************************************************************************** 19 * Exports 20 ****************************************************************************/ 21 22 /**************************************************************************** 23 * 24 ****************************************************************************/ 25 #define yv12_align_addr(addr, align) \ 26 (void *)(((size_t)(addr) + ((align)-1)) & (size_t) - (align)) 27 28 int vp8_yv12_de_alloc_frame_buffer(YV12_BUFFER_CONFIG *ybf) { 29 if (ybf) { 30 // If libvpx is using frame buffer callbacks then buffer_alloc_sz must 31 // not be set. 32 if (ybf->buffer_alloc_sz > 0) { 33 vpx_free(ybf->buffer_alloc); 34 } 35 36 /* buffer_alloc isn't accessed by most functions. Rather y_buffer, 37 u_buffer and v_buffer point to buffer_alloc and are used. Clear out 38 all of this so that a freed pointer isn't inadvertently used */ 39 memset(ybf, 0, sizeof(YV12_BUFFER_CONFIG)); 40 } else { 41 return -1; 42 } 43 44 return 0; 45 } 46 47 int vp8_yv12_realloc_frame_buffer(YV12_BUFFER_CONFIG *ybf, int width, 48 int height, int border) { 49 if (ybf) { 50 int aligned_width = (width + 15) & ~15; 51 int aligned_height = (height + 15) & ~15; 52 int y_stride = ((aligned_width + 2 * border) + 31) & ~31; 53 int yplane_size = (aligned_height + 2 * border) * y_stride; 54 int uv_width = aligned_width >> 1; 55 int uv_height = aligned_height >> 1; 56 /** There is currently a bunch of code which assumes 57 * uv_stride == y_stride/2, so enforce this here. */ 58 int uv_stride = y_stride >> 1; 59 int uvplane_size = (uv_height + border) * uv_stride; 60 const int frame_size = yplane_size + 2 * uvplane_size; 61 62 if (!ybf->buffer_alloc) { 63 ybf->buffer_alloc = (uint8_t *)vpx_memalign(32, frame_size); 64 ybf->buffer_alloc_sz = frame_size; 65 } 66 67 if (!ybf->buffer_alloc || ybf->buffer_alloc_sz < frame_size) return -1; 68 69 /* Only support allocating buffers that have a border that's a multiple 70 * of 32. The border restriction is required to get 16-byte alignment of 71 * the start of the chroma rows without introducing an arbitrary gap 72 * between planes, which would break the semantics of things like 73 * vpx_img_set_rect(). */ 74 if (border & 0x1f) return -3; 75 76 ybf->y_crop_width = width; 77 ybf->y_crop_height = height; 78 ybf->y_width = aligned_width; 79 ybf->y_height = aligned_height; 80 ybf->y_stride = y_stride; 81 82 ybf->uv_crop_width = (width + 1) / 2; 83 ybf->uv_crop_height = (height + 1) / 2; 84 ybf->uv_width = uv_width; 85 ybf->uv_height = uv_height; 86 ybf->uv_stride = uv_stride; 87 88 ybf->alpha_width = 0; 89 ybf->alpha_height = 0; 90 ybf->alpha_stride = 0; 91 92 ybf->border = border; 93 ybf->frame_size = frame_size; 94 95 ybf->y_buffer = ybf->buffer_alloc + (border * y_stride) + border; 96 ybf->u_buffer = 97 ybf->buffer_alloc + yplane_size + (border / 2 * uv_stride) + border / 2; 98 ybf->v_buffer = ybf->buffer_alloc + yplane_size + uvplane_size + 99 (border / 2 * uv_stride) + border / 2; 100 ybf->alpha_buffer = NULL; 101 102 ybf->corrupted = 0; /* assume not currupted by errors */ 103 return 0; 104 } 105 return -2; 106 } 107 108 int vp8_yv12_alloc_frame_buffer(YV12_BUFFER_CONFIG *ybf, int width, int height, 109 int border) { 110 if (ybf) { 111 vp8_yv12_de_alloc_frame_buffer(ybf); 112 return vp8_yv12_realloc_frame_buffer(ybf, width, height, border); 113 } 114 return -2; 115 } 116 117 #if CONFIG_VP9 118 // TODO(jkoleszar): Maybe replace this with struct vpx_image 119 120 int vpx_free_frame_buffer(YV12_BUFFER_CONFIG *ybf) { 121 if (ybf) { 122 if (ybf->buffer_alloc_sz > 0) { 123 vpx_free(ybf->buffer_alloc); 124 } 125 126 /* buffer_alloc isn't accessed by most functions. Rather y_buffer, 127 u_buffer and v_buffer point to buffer_alloc and are used. Clear out 128 all of this so that a freed pointer isn't inadvertently used */ 129 memset(ybf, 0, sizeof(YV12_BUFFER_CONFIG)); 130 } else { 131 return -1; 132 } 133 134 return 0; 135 } 136 137 int vpx_realloc_frame_buffer(YV12_BUFFER_CONFIG *ybf, int width, int height, 138 int ss_x, int ss_y, 139 #if CONFIG_VP9_HIGHBITDEPTH 140 int use_highbitdepth, 141 #endif 142 int border, int byte_alignment, 143 vpx_codec_frame_buffer_t *fb, 144 vpx_get_frame_buffer_cb_fn_t cb, void *cb_priv) { 145 if (ybf) { 146 const int vp9_byte_align = (byte_alignment == 0) ? 1 : byte_alignment; 147 const int aligned_width = (width + 7) & ~7; 148 const int aligned_height = (height + 7) & ~7; 149 const int y_stride = ((aligned_width + 2 * border) + 31) & ~31; 150 const uint64_t yplane_size = 151 (aligned_height + 2 * border) * (uint64_t)y_stride + byte_alignment; 152 const int uv_width = aligned_width >> ss_x; 153 const int uv_height = aligned_height >> ss_y; 154 const int uv_stride = y_stride >> ss_x; 155 const int uv_border_w = border >> ss_x; 156 const int uv_border_h = border >> ss_y; 157 const uint64_t uvplane_size = 158 (uv_height + 2 * uv_border_h) * (uint64_t)uv_stride + byte_alignment; 159 160 #if CONFIG_VP9_HIGHBITDEPTH 161 const uint64_t frame_size = 162 (1 + use_highbitdepth) * (yplane_size + 2 * uvplane_size); 163 #else 164 const uint64_t frame_size = yplane_size + 2 * uvplane_size; 165 #endif // CONFIG_VP9_HIGHBITDEPTH 166 167 uint8_t *buf = NULL; 168 169 // frame_size is stored in buffer_alloc_sz, which is an int. If it won't 170 // fit, fail early. 171 if (frame_size > INT_MAX) { 172 return -1; 173 } 174 175 if (cb != NULL) { 176 const int align_addr_extra_size = 31; 177 const uint64_t external_frame_size = frame_size + align_addr_extra_size; 178 179 assert(fb != NULL); 180 181 if (external_frame_size != (size_t)external_frame_size) return -1; 182 183 // Allocation to hold larger frame, or first allocation. 184 if (cb(cb_priv, (size_t)external_frame_size, fb) < 0) return -1; 185 186 if (fb->data == NULL || fb->size < external_frame_size) return -1; 187 188 ybf->buffer_alloc = (uint8_t *)yv12_align_addr(fb->data, 32); 189 190 #if defined(__has_feature) 191 #if __has_feature(memory_sanitizer) 192 // This memset is needed for fixing the issue of using uninitialized 193 // value in msan test. It will cause a perf loss, so only do this for 194 // msan test. 195 memset(ybf->buffer_alloc, 0, (int)frame_size); 196 #endif 197 #endif 198 } else if (frame_size > (size_t)ybf->buffer_alloc_sz) { 199 // Allocation to hold larger frame, or first allocation. 200 vpx_free(ybf->buffer_alloc); 201 ybf->buffer_alloc = NULL; 202 203 ybf->buffer_alloc = (uint8_t *)vpx_memalign(32, (size_t)frame_size); 204 if (!ybf->buffer_alloc) return -1; 205 206 ybf->buffer_alloc_sz = (int)frame_size; 207 208 // This memset is needed for fixing valgrind error from C loop filter 209 // due to access uninitialized memory in frame border. It could be 210 // removed if border is totally removed. 211 memset(ybf->buffer_alloc, 0, ybf->buffer_alloc_sz); 212 } 213 214 /* Only support allocating buffers that have a border that's a multiple 215 * of 32. The border restriction is required to get 16-byte alignment of 216 * the start of the chroma rows without introducing an arbitrary gap 217 * between planes, which would break the semantics of things like 218 * vpx_img_set_rect(). */ 219 if (border & 0x1f) return -3; 220 221 ybf->y_crop_width = width; 222 ybf->y_crop_height = height; 223 ybf->y_width = aligned_width; 224 ybf->y_height = aligned_height; 225 ybf->y_stride = y_stride; 226 227 ybf->uv_crop_width = (width + ss_x) >> ss_x; 228 ybf->uv_crop_height = (height + ss_y) >> ss_y; 229 ybf->uv_width = uv_width; 230 ybf->uv_height = uv_height; 231 ybf->uv_stride = uv_stride; 232 233 ybf->border = border; 234 ybf->frame_size = (int)frame_size; 235 ybf->subsampling_x = ss_x; 236 ybf->subsampling_y = ss_y; 237 238 buf = ybf->buffer_alloc; 239 #if CONFIG_VP9_HIGHBITDEPTH 240 if (use_highbitdepth) { 241 // Store uint16 addresses when using 16bit framebuffers 242 buf = CONVERT_TO_BYTEPTR(ybf->buffer_alloc); 243 ybf->flags = YV12_FLAG_HIGHBITDEPTH; 244 } else { 245 ybf->flags = 0; 246 } 247 #endif // CONFIG_VP9_HIGHBITDEPTH 248 249 ybf->y_buffer = (uint8_t *)yv12_align_addr( 250 buf + (border * y_stride) + border, vp9_byte_align); 251 ybf->u_buffer = (uint8_t *)yv12_align_addr( 252 buf + yplane_size + (uv_border_h * uv_stride) + uv_border_w, 253 vp9_byte_align); 254 ybf->v_buffer = 255 (uint8_t *)yv12_align_addr(buf + yplane_size + uvplane_size + 256 (uv_border_h * uv_stride) + uv_border_w, 257 vp9_byte_align); 258 259 ybf->corrupted = 0; /* assume not corrupted by errors */ 260 return 0; 261 } 262 return -2; 263 } 264 265 int vpx_alloc_frame_buffer(YV12_BUFFER_CONFIG *ybf, int width, int height, 266 int ss_x, int ss_y, 267 #if CONFIG_VP9_HIGHBITDEPTH 268 int use_highbitdepth, 269 #endif 270 int border, int byte_alignment) { 271 if (ybf) { 272 vpx_free_frame_buffer(ybf); 273 return vpx_realloc_frame_buffer(ybf, width, height, ss_x, ss_y, 274 #if CONFIG_VP9_HIGHBITDEPTH 275 use_highbitdepth, 276 #endif 277 border, byte_alignment, NULL, NULL, NULL); 278 } 279 return -2; 280 } 281 #endif 282
