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