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1 /* | 1 /* |
2 * Copyright (c) 2013 The WebRTC project authors. All Rights Reserved. | 2 * Copyright (c) 2013 The WebRTC project authors. All Rights Reserved. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license | 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 | 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 | 6 * tree. An additional intellectual property rights grant can be found |
7 * in the file PATENTS. All contributing project authors may | 7 * in the file PATENTS. All contributing project authors may |
8 * be found in the AUTHORS file in the root of the source tree. | 8 * be found in the AUTHORS file in the root of the source tree. |
9 */ | 9 */ |
10 | 10 |
11 #include "webrtc/modules/desktop_capture/x11/x_server_pixel_buffer.h" | 11 #include "webrtc/modules/desktop_capture/x11/x_server_pixel_buffer.h" |
12 | 12 |
13 #include <assert.h> | 13 #include <assert.h> |
14 #include <string.h> | 14 #include <string.h> |
15 #include <sys/shm.h> | 15 #include <sys/shm.h> |
16 | 16 |
17 #include "webrtc/modules/desktop_capture/desktop_frame.h" | 17 #include "webrtc/modules/desktop_capture/desktop_frame.h" |
18 #include "webrtc/modules/desktop_capture/x11/x_error_trap.h" | 18 #include "webrtc/modules/desktop_capture/x11/x_error_trap.h" |
19 #include "webrtc/system_wrappers/include/logging.h" | |
20 | 19 |
21 namespace { | 20 namespace { |
22 | 21 |
23 // Returns the number of bits |mask| has to be shifted left so its last | 22 // Returns the number of bits |mask| has to be shifted left so its last |
24 // (most-significant) bit set becomes the most-significant bit of the word. | 23 // (most-significant) bit set becomes the most-significant bit of the word. |
25 // When |mask| is 0 the function returns 31. | 24 // When |mask| is 0 the function returns 31. |
26 uint32_t MaskToShift(uint32_t mask) { | 25 uint32_t MaskToShift(uint32_t mask) { |
27 int shift = 0; | 26 int shift = 0; |
28 if ((mask & 0xffff0000u) == 0) { | 27 if ((mask & 0xffff0000u) == 0) { |
29 mask <<= 16; | 28 mask <<= 16; |
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143 if (shmat_result != reinterpret_cast<void*>(-1)) { | 142 if (shmat_result != reinterpret_cast<void*>(-1)) { |
144 shm_segment_info_->shmaddr = reinterpret_cast<char*>(shmat_result); | 143 shm_segment_info_->shmaddr = reinterpret_cast<char*>(shmat_result); |
145 x_image_->data = shm_segment_info_->shmaddr; | 144 x_image_->data = shm_segment_info_->shmaddr; |
146 | 145 |
147 XErrorTrap error_trap(display_); | 146 XErrorTrap error_trap(display_); |
148 using_shm = XShmAttach(display_, shm_segment_info_); | 147 using_shm = XShmAttach(display_, shm_segment_info_); |
149 XSync(display_, False); | 148 XSync(display_, False); |
150 if (error_trap.GetLastErrorAndDisable() != 0) | 149 if (error_trap.GetLastErrorAndDisable() != 0) |
151 using_shm = false; | 150 using_shm = false; |
152 if (using_shm) { | 151 if (using_shm) { |
153 LOG(LS_VERBOSE) << "Using X shared memory segment " | |
154 << shm_segment_info_->shmid; | |
155 } | 152 } |
156 } | 153 } |
157 } else { | 154 } else { |
158 LOG(LS_WARNING) << "Failed to get shared memory segment. " | |
159 "Performance may be degraded."; | |
160 } | 155 } |
161 } | 156 } |
162 | 157 |
163 if (!using_shm) { | 158 if (!using_shm) { |
164 LOG(LS_WARNING) << "Not using shared memory. Performance may be degraded."; | |
165 ReleaseSharedMemorySegment(); | 159 ReleaseSharedMemorySegment(); |
166 return; | 160 return; |
167 } | 161 } |
168 | 162 |
169 if (have_pixmaps) | 163 if (have_pixmaps) |
170 have_pixmaps = InitPixmaps(default_depth); | 164 have_pixmaps = InitPixmaps(default_depth); |
171 | 165 |
172 shmctl(shm_segment_info_->shmid, IPC_RMID, 0); | 166 shmctl(shm_segment_info_->shmid, IPC_RMID, 0); |
173 shm_segment_info_->shmid = -1; | 167 shm_segment_info_->shmid = -1; |
174 | |
175 LOG(LS_VERBOSE) << "Using X shared memory extension v" | |
176 << major << "." << minor | |
177 << " with" << (have_pixmaps ? "" : "out") << " pixmaps."; | |
178 } | 168 } |
179 | 169 |
180 bool XServerPixelBuffer::InitPixmaps(int depth) { | 170 bool XServerPixelBuffer::InitPixmaps(int depth) { |
181 if (XShmPixmapFormat(display_) != ZPixmap) | 171 if (XShmPixmapFormat(display_) != ZPixmap) |
182 return false; | 172 return false; |
183 | 173 |
184 { | 174 { |
185 XErrorTrap error_trap(display_); | 175 XErrorTrap error_trap(display_); |
186 shm_pixmap_ = XShmCreatePixmap(display_, window_, | 176 shm_pixmap_ = XShmCreatePixmap(display_, window_, |
187 shm_segment_info_->shmaddr, | 177 shm_segment_info_->shmaddr, |
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339 // Write as 32-bit RGB. | 329 // Write as 32-bit RGB. |
340 dst_pos_32[x] = ((r >> 8) & 0xff0000) | ((g >> 16) & 0xff00) | | 330 dst_pos_32[x] = ((r >> 8) & 0xff0000) | ((g >> 16) & 0xff00) | |
341 ((b >> 24) & 0xff); | 331 ((b >> 24) & 0xff); |
342 } | 332 } |
343 dst_pos += frame->stride(); | 333 dst_pos += frame->stride(); |
344 src_pos += src_stride; | 334 src_pos += src_stride; |
345 } | 335 } |
346 } | 336 } |
347 | 337 |
348 } // namespace webrtc | 338 } // namespace webrtc |
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