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 #if defined(VPX_MAX_ALLOCABLE_MEMORY)
19 #include "vp9/common/vp9_onyxc_int.h"
20 #endif // VPX_MAX_ALLOCABLE_MEMORY
21 /****************************************************************************
22 * Exports
23 ****************************************************************************/
24
25 /****************************************************************************
26 *
27 ****************************************************************************/
28 #define yv12_align_addr(addr, align) \
29 (void *)(((size_t)(addr) + ((align)-1)) & (size_t) - (align))
30
vp8_yv12_de_alloc_frame_buffer(YV12_BUFFER_CONFIG * ybf)31 int vp8_yv12_de_alloc_frame_buffer(YV12_BUFFER_CONFIG *ybf) {
32 if (ybf) {
33 // If libvpx is using frame buffer callbacks then buffer_alloc_sz must
34 // not be set.
35 if (ybf->buffer_alloc_sz > 0) {
36 vpx_free(ybf->buffer_alloc);
37 }
38
39 /* buffer_alloc isn't accessed by most functions. Rather y_buffer,
40 u_buffer and v_buffer point to buffer_alloc and are used. Clear out
41 all of this so that a freed pointer isn't inadvertently used */
42 memset(ybf, 0, sizeof(YV12_BUFFER_CONFIG));
43 } else {
44 return -1;
45 }
46
47 return 0;
48 }
49
vp8_yv12_realloc_frame_buffer(YV12_BUFFER_CONFIG * ybf,int width,int height,int border)50 int vp8_yv12_realloc_frame_buffer(YV12_BUFFER_CONFIG *ybf, int width,
51 int height, int border) {
52 if (ybf) {
53 int aligned_width = (width + 15) & ~15;
54 int aligned_height = (height + 15) & ~15;
55 int y_stride = ((aligned_width + 2 * border) + 31) & ~31;
56 int yplane_size = (aligned_height + 2 * border) * y_stride;
57 int uv_width = aligned_width >> 1;
58 int uv_height = aligned_height >> 1;
59 /** There is currently a bunch of code which assumes
60 * uv_stride == y_stride/2, so enforce this here. */
61 int uv_stride = y_stride >> 1;
62 int uvplane_size = (uv_height + border) * uv_stride;
63 const size_t frame_size = yplane_size + 2 * uvplane_size;
64
65 if (!ybf->buffer_alloc) {
66 ybf->buffer_alloc = (uint8_t *)vpx_memalign(32, frame_size);
67 #if defined(__has_feature)
68 #if __has_feature(memory_sanitizer)
69 // This memset is needed for fixing the issue of using uninitialized
70 // value in msan test. It will cause a perf loss, so only do this for
71 // msan test.
72 memset(ybf->buffer_alloc, 0, frame_size);
73 #endif
74 #endif
75 ybf->buffer_alloc_sz = frame_size;
76 }
77
78 if (!ybf->buffer_alloc || ybf->buffer_alloc_sz < frame_size) return -1;
79
80 /* Only support allocating buffers that have a border that's a multiple
81 * of 32. The border restriction is required to get 16-byte alignment of
82 * the start of the chroma rows without introducing an arbitrary gap
83 * between planes, which would break the semantics of things like
84 * vpx_img_set_rect(). */
85 if (border & 0x1f) return -3;
86
87 ybf->y_crop_width = width;
88 ybf->y_crop_height = height;
89 ybf->y_width = aligned_width;
90 ybf->y_height = aligned_height;
91 ybf->y_stride = y_stride;
92
93 ybf->uv_crop_width = (width + 1) / 2;
94 ybf->uv_crop_height = (height + 1) / 2;
95 ybf->uv_width = uv_width;
96 ybf->uv_height = uv_height;
97 ybf->uv_stride = uv_stride;
98
99 ybf->alpha_width = 0;
100 ybf->alpha_height = 0;
101 ybf->alpha_stride = 0;
102
103 ybf->border = border;
104 ybf->frame_size = frame_size;
105
106 ybf->y_buffer = ybf->buffer_alloc + (border * y_stride) + border;
107 ybf->u_buffer =
108 ybf->buffer_alloc + yplane_size + (border / 2 * uv_stride) + border / 2;
109 ybf->v_buffer = ybf->buffer_alloc + yplane_size + uvplane_size +
110 (border / 2 * uv_stride) + border / 2;
111 ybf->alpha_buffer = NULL;
112
113 ybf->corrupted = 0; /* assume not currupted by errors */
114 return 0;
115 }
116 return -2;
117 }
118
vp8_yv12_alloc_frame_buffer(YV12_BUFFER_CONFIG * ybf,int width,int height,int border)119 int vp8_yv12_alloc_frame_buffer(YV12_BUFFER_CONFIG *ybf, int width, int height,
120 int border) {
121 if (ybf) {
122 vp8_yv12_de_alloc_frame_buffer(ybf);
123 return vp8_yv12_realloc_frame_buffer(ybf, width, height, border);
124 }
125 return -2;
126 }
127
128 #if CONFIG_VP9
129 // TODO(jkoleszar): Maybe replace this with struct vpx_image
130
vpx_free_frame_buffer(YV12_BUFFER_CONFIG * ybf)131 int vpx_free_frame_buffer(YV12_BUFFER_CONFIG *ybf) {
132 if (ybf) {
133 if (ybf->buffer_alloc_sz > 0) {
134 vpx_free(ybf->buffer_alloc);
135 }
136
137 /* buffer_alloc isn't accessed by most functions. Rather y_buffer,
138 u_buffer and v_buffer point to buffer_alloc and are used. Clear out
139 all of this so that a freed pointer isn't inadvertently used */
140 memset(ybf, 0, sizeof(YV12_BUFFER_CONFIG));
141 } else {
142 return -1;
143 }
144
145 return 0;
146 }
147
vpx_realloc_frame_buffer(YV12_BUFFER_CONFIG * ybf,int width,int height,int ss_x,int ss_y,int use_highbitdepth,int border,int byte_alignment,vpx_codec_frame_buffer_t * fb,vpx_get_frame_buffer_cb_fn_t cb,void * cb_priv)148 int vpx_realloc_frame_buffer(YV12_BUFFER_CONFIG *ybf, int width, int height,
149 int ss_x, int ss_y,
150 #if CONFIG_VP9_HIGHBITDEPTH
151 int use_highbitdepth,
152 #endif
153 int border, int byte_alignment,
154 vpx_codec_frame_buffer_t *fb,
155 vpx_get_frame_buffer_cb_fn_t cb, void *cb_priv) {
156 #if CONFIG_SIZE_LIMIT
157 if (width > DECODE_WIDTH_LIMIT || height > DECODE_HEIGHT_LIMIT) return -1;
158 #endif
159
160 /* Only support allocating buffers that have a border that's a multiple
161 * of 32. The border restriction is required to get 16-byte alignment of
162 * the start of the chroma rows without introducing an arbitrary gap
163 * between planes, which would break the semantics of things like
164 * vpx_img_set_rect(). */
165 if (border & 0x1f) return -3;
166
167 if (ybf) {
168 const int vp9_byte_align = (byte_alignment == 0) ? 1 : byte_alignment;
169 const int aligned_width = (width + 7) & ~7;
170 const int aligned_height = (height + 7) & ~7;
171 const int y_stride = ((aligned_width + 2 * border) + 31) & ~31;
172 const uint64_t yplane_size =
173 (aligned_height + 2 * border) * (uint64_t)y_stride + byte_alignment;
174 const int uv_width = aligned_width >> ss_x;
175 const int uv_height = aligned_height >> ss_y;
176 const int uv_stride = y_stride >> ss_x;
177 const int uv_border_w = border >> ss_x;
178 const int uv_border_h = border >> ss_y;
179 const uint64_t uvplane_size =
180 (uv_height + 2 * uv_border_h) * (uint64_t)uv_stride + byte_alignment;
181
182 #if CONFIG_VP9_HIGHBITDEPTH
183 const uint64_t frame_size =
184 (1 + use_highbitdepth) * (yplane_size + 2 * uvplane_size);
185 #else
186 const uint64_t frame_size = yplane_size + 2 * uvplane_size;
187 #endif // CONFIG_VP9_HIGHBITDEPTH
188
189 uint8_t *buf = NULL;
190
191 #if defined(VPX_MAX_ALLOCABLE_MEMORY)
192 // The decoder may allocate REF_FRAMES frame buffers in the frame buffer
193 // pool. Bound the total amount of allocated memory as if these REF_FRAMES
194 // frame buffers were allocated in a single allocation.
195 if (frame_size > VPX_MAX_ALLOCABLE_MEMORY / REF_FRAMES) return -1;
196 #endif // VPX_MAX_ALLOCABLE_MEMORY
197
198 // frame_size is stored in buffer_alloc_sz, which is a size_t. If it won't
199 // fit, fail early.
200 if (frame_size > SIZE_MAX) {
201 return -1;
202 }
203
204 if (cb != NULL) {
205 const int align_addr_extra_size = 31;
206 const uint64_t external_frame_size = frame_size + align_addr_extra_size;
207
208 assert(fb != NULL);
209
210 if (external_frame_size != (size_t)external_frame_size) return -1;
211
212 // Allocation to hold larger frame, or first allocation.
213 if (cb(cb_priv, (size_t)external_frame_size, fb) < 0) return -1;
214
215 if (fb->data == NULL || fb->size < external_frame_size) return -1;
216
217 ybf->buffer_alloc = (uint8_t *)yv12_align_addr(fb->data, 32);
218
219 #if defined(__has_feature)
220 #if __has_feature(memory_sanitizer)
221 // This memset is needed for fixing the issue of using uninitialized
222 // value in msan test. It will cause a perf loss, so only do this for
223 // msan test.
224 memset(ybf->buffer_alloc, 0, (size_t)frame_size);
225 #endif
226 #endif
227 } else if (frame_size > ybf->buffer_alloc_sz) {
228 // Allocation to hold larger frame, or first allocation.
229 vpx_free(ybf->buffer_alloc);
230 ybf->buffer_alloc = NULL;
231
232 ybf->buffer_alloc = (uint8_t *)vpx_memalign(32, (size_t)frame_size);
233 if (!ybf->buffer_alloc) return -1;
234
235 ybf->buffer_alloc_sz = (size_t)frame_size;
236
237 // This memset is needed for fixing valgrind error from C loop filter
238 // due to access uninitialized memory in frame border. It could be
239 // removed if border is totally removed.
240 memset(ybf->buffer_alloc, 0, ybf->buffer_alloc_sz);
241 }
242
243 ybf->y_crop_width = width;
244 ybf->y_crop_height = height;
245 ybf->y_width = aligned_width;
246 ybf->y_height = aligned_height;
247 ybf->y_stride = y_stride;
248
249 ybf->uv_crop_width = (width + ss_x) >> ss_x;
250 ybf->uv_crop_height = (height + ss_y) >> ss_y;
251 ybf->uv_width = uv_width;
252 ybf->uv_height = uv_height;
253 ybf->uv_stride = uv_stride;
254
255 ybf->border = border;
256 ybf->frame_size = (size_t)frame_size;
257 ybf->subsampling_x = ss_x;
258 ybf->subsampling_y = ss_y;
259
260 buf = ybf->buffer_alloc;
261 #if CONFIG_VP9_HIGHBITDEPTH
262 if (use_highbitdepth) {
263 // Store uint16 addresses when using 16bit framebuffers
264 buf = CONVERT_TO_BYTEPTR(ybf->buffer_alloc);
265 ybf->flags = YV12_FLAG_HIGHBITDEPTH;
266 } else {
267 ybf->flags = 0;
268 }
269 #endif // CONFIG_VP9_HIGHBITDEPTH
270
271 ybf->y_buffer = (uint8_t *)yv12_align_addr(
272 buf + (border * y_stride) + border, vp9_byte_align);
273 ybf->u_buffer = (uint8_t *)yv12_align_addr(
274 buf + yplane_size + (uv_border_h * uv_stride) + uv_border_w,
275 vp9_byte_align);
276 ybf->v_buffer =
277 (uint8_t *)yv12_align_addr(buf + yplane_size + uvplane_size +
278 (uv_border_h * uv_stride) + uv_border_w,
279 vp9_byte_align);
280
281 ybf->corrupted = 0; /* assume not corrupted by errors */
282 return 0;
283 }
284 return -2;
285 }
286
vpx_alloc_frame_buffer(YV12_BUFFER_CONFIG * ybf,int width,int height,int ss_x,int ss_y,int use_highbitdepth,int border,int byte_alignment)287 int vpx_alloc_frame_buffer(YV12_BUFFER_CONFIG *ybf, int width, int height,
288 int ss_x, int ss_y,
289 #if CONFIG_VP9_HIGHBITDEPTH
290 int use_highbitdepth,
291 #endif
292 int border, int byte_alignment) {
293 if (ybf) {
294 vpx_free_frame_buffer(ybf);
295 return vpx_realloc_frame_buffer(ybf, width, height, ss_x, ss_y,
296 #if CONFIG_VP9_HIGHBITDEPTH
297 use_highbitdepth,
298 #endif
299 border, byte_alignment, NULL, NULL, NULL);
300 }
301 return -2;
302 }
303 #endif
304