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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "remoting/capturer/video_frame_capturer.h" | |
| 6 | |
| 7 #include <ApplicationServices/ApplicationServices.h> | |
| 8 #include <Cocoa/Cocoa.h> | |
| 9 #include <dlfcn.h> | |
| 10 #include <IOKit/pwr_mgt/IOPMLib.h> | |
| 11 #include <OpenGL/CGLMacro.h> | |
| 12 #include <OpenGL/OpenGL.h> | |
| 13 #include <set> | |
| 14 #include <stddef.h> | |
| 15 | |
| 16 #include "base/logging.h" | |
| 17 #include "base/file_path.h" | |
| 18 #include "base/mac/mac_util.h" | |
| 19 #include "base/mac/scoped_cftyperef.h" | |
| 20 #include "base/memory/scoped_ptr.h" | |
| 21 #include "base/scoped_native_library.h" | |
| 22 #include "base/synchronization/waitable_event.h" | |
| 23 #include "base/time.h" | |
| 24 #include "remoting/capturer/capture_data.h" | |
| 25 #include "remoting/capturer/mac/desktop_configuration.h" | |
| 26 #include "remoting/capturer/mac/scoped_pixel_buffer_object.h" | |
| 27 #include "remoting/capturer/mouse_cursor_shape.h" | |
| 28 #include "remoting/capturer/video_frame.h" | |
| 29 #include "remoting/capturer/video_frame_capturer_helper.h" | |
| 30 #include "remoting/capturer/video_frame_queue.h" | |
| 31 #include "skia/ext/skia_utils_mac.h" | |
| 32 | |
| 33 namespace remoting { | |
| 34 | |
| 35 namespace { | |
| 36 | |
| 37 // Definitions used to dynamic-link to deprecated OS 10.6 functions. | |
| 38 const char* kApplicationServicesLibraryName = | |
| 39 "/System/Library/Frameworks/ApplicationServices.framework/" | |
| 40 "ApplicationServices"; | |
| 41 typedef void* (*CGDisplayBaseAddressFunc)(CGDirectDisplayID); | |
| 42 typedef size_t (*CGDisplayBytesPerRowFunc)(CGDirectDisplayID); | |
| 43 typedef size_t (*CGDisplayBitsPerPixelFunc)(CGDirectDisplayID); | |
| 44 const char* kOpenGlLibraryName = | |
| 45 "/System/Library/Frameworks/OpenGL.framework/OpenGL"; | |
| 46 typedef CGLError (*CGLSetFullScreenFunc)(CGLContextObj); | |
| 47 | |
| 48 // Standard DPI for Mac OS X displays with 1:1 backing scale. | |
| 49 const int kStandardDPI = 72; | |
| 50 | |
| 51 // skia/ext/skia_utils_mac.h only defines CGRectToSkRect(). | |
| 52 SkIRect CGRectToSkIRect(const CGRect& rect) { | |
| 53 SkIRect result; | |
| 54 gfx::CGRectToSkRect(rect).round(&result); | |
| 55 return result; | |
| 56 } | |
| 57 | |
| 58 // Scales all coordinates of an SkRect by a specified factor. | |
| 59 SkRect ScaleSkRect(const SkRect& rect, float scale) { | |
| 60 SkRect result = { | |
| 61 rect.left() * scale, rect.top() * scale, | |
| 62 rect.right() * scale, rect.bottom() * scale | |
| 63 }; | |
| 64 return result; | |
| 65 } | |
| 66 | |
| 67 // Copy pixels in the |rect| from |src_place| to |dest_plane|. | |
| 68 void CopyRect(const uint8* src_plane, | |
| 69 int src_plane_stride, | |
| 70 uint8* dest_plane, | |
| 71 int dest_plane_stride, | |
| 72 int bytes_per_pixel, | |
| 73 const SkIRect& rect) { | |
| 74 // Get the address of the starting point. | |
| 75 const int src_y_offset = src_plane_stride * rect.top(); | |
| 76 const int dest_y_offset = dest_plane_stride * rect.top(); | |
| 77 const int x_offset = bytes_per_pixel * rect.left(); | |
| 78 src_plane += src_y_offset + x_offset; | |
| 79 dest_plane += dest_y_offset + x_offset; | |
| 80 | |
| 81 // Copy pixels in the rectangle line by line. | |
| 82 const int bytes_per_line = bytes_per_pixel * rect.width(); | |
| 83 const int height = rect.height(); | |
| 84 for (int i = 0 ; i < height; ++i) { | |
| 85 memcpy(dest_plane, src_plane, bytes_per_line); | |
| 86 src_plane += src_plane_stride; | |
| 87 dest_plane += dest_plane_stride; | |
| 88 } | |
| 89 } | |
| 90 | |
| 91 // The amount of time allowed for displays to reconfigure. | |
| 92 const int64 kDisplayConfigurationEventTimeoutInSeconds = 10; | |
| 93 | |
| 94 // A class representing a full-frame pixel buffer. | |
| 95 class VideoFrameMac : public VideoFrame { | |
| 96 public: | |
| 97 explicit VideoFrameMac(const MacDesktopConfiguration& desktop_config); | |
| 98 virtual ~VideoFrameMac(); | |
| 99 | |
| 100 const SkIPoint& dpi() const { return dpi_; } | |
| 101 | |
| 102 private: | |
| 103 // Allocated pixel buffer. | |
| 104 scoped_array<uint8> data_; | |
| 105 | |
| 106 // DPI settings for this buffer. | |
| 107 SkIPoint dpi_; | |
| 108 | |
| 109 DISALLOW_COPY_AND_ASSIGN(VideoFrameMac); | |
| 110 }; | |
| 111 | |
| 112 // A class to perform video frame capturing for mac. | |
| 113 class VideoFrameCapturerMac : public VideoFrameCapturer { | |
| 114 public: | |
| 115 VideoFrameCapturerMac(); | |
| 116 virtual ~VideoFrameCapturerMac(); | |
| 117 | |
| 118 bool Init(); | |
| 119 | |
| 120 // Overridden from VideoFrameCapturer: | |
| 121 virtual void Start(Delegate* delegate) OVERRIDE; | |
| 122 virtual void Stop() OVERRIDE; | |
| 123 virtual void InvalidateRegion(const SkRegion& invalid_region) OVERRIDE; | |
| 124 virtual void CaptureFrame() OVERRIDE; | |
| 125 | |
| 126 private: | |
| 127 void CaptureCursor(); | |
| 128 | |
| 129 void GlBlitFast(const VideoFrame& buffer, const SkRegion& region); | |
| 130 void GlBlitSlow(const VideoFrame& buffer); | |
| 131 void CgBlitPreLion(const VideoFrame& buffer, const SkRegion& region); | |
| 132 void CgBlitPostLion(const VideoFrame& buffer, const SkRegion& region); | |
| 133 | |
| 134 // Called when the screen configuration is changed. | |
| 135 void ScreenConfigurationChanged(); | |
| 136 | |
| 137 void ScreenRefresh(CGRectCount count, const CGRect *rect_array); | |
| 138 void ScreenUpdateMove(CGScreenUpdateMoveDelta delta, | |
| 139 size_t count, | |
| 140 const CGRect *rect_array); | |
| 141 void DisplaysReconfigured(CGDirectDisplayID display, | |
| 142 CGDisplayChangeSummaryFlags flags); | |
| 143 static void ScreenRefreshCallback(CGRectCount count, | |
| 144 const CGRect *rect_array, | |
| 145 void *user_parameter); | |
| 146 static void ScreenUpdateMoveCallback(CGScreenUpdateMoveDelta delta, | |
| 147 size_t count, | |
| 148 const CGRect *rect_array, | |
| 149 void *user_parameter); | |
| 150 static void DisplaysReconfiguredCallback(CGDirectDisplayID display, | |
| 151 CGDisplayChangeSummaryFlags flags, | |
| 152 void *user_parameter); | |
| 153 | |
| 154 void ReleaseBuffers(); | |
| 155 | |
| 156 Delegate* delegate_; | |
| 157 | |
| 158 CGLContextObj cgl_context_; | |
| 159 ScopedPixelBufferObject pixel_buffer_object_; | |
| 160 | |
| 161 // Queue of the frames buffers. | |
| 162 VideoFrameQueue queue_; | |
| 163 | |
| 164 // Current display configuration. | |
| 165 MacDesktopConfiguration desktop_config_; | |
| 166 | |
| 167 // A thread-safe list of invalid rectangles, and the size of the most | |
| 168 // recently captured screen. | |
| 169 VideoFrameCapturerHelper helper_; | |
| 170 | |
| 171 // Image of the last cursor that we sent to the client. | |
| 172 base::mac::ScopedCFTypeRef<CGImageRef> current_cursor_; | |
| 173 | |
| 174 // Contains an invalid region from the previous capture. | |
| 175 SkRegion last_invalid_region_; | |
| 176 | |
| 177 // Used to ensure that frame captures do not take place while displays | |
| 178 // are being reconfigured. | |
| 179 base::WaitableEvent display_configuration_capture_event_; | |
| 180 | |
| 181 // Records the Ids of attached displays which are being reconfigured. | |
| 182 // Accessed on the thread on which we are notified of display events. | |
| 183 std::set<CGDirectDisplayID> reconfiguring_displays_; | |
| 184 | |
| 185 // Power management assertion to prevent the screen from sleeping. | |
| 186 IOPMAssertionID power_assertion_id_display_; | |
| 187 | |
| 188 // Power management assertion to indicate that the user is active. | |
| 189 IOPMAssertionID power_assertion_id_user_; | |
| 190 | |
| 191 // Dynamically link to deprecated APIs for Mac OS X 10.6 support. | |
| 192 base::ScopedNativeLibrary app_services_library_; | |
| 193 CGDisplayBaseAddressFunc cg_display_base_address_; | |
| 194 CGDisplayBytesPerRowFunc cg_display_bytes_per_row_; | |
| 195 CGDisplayBitsPerPixelFunc cg_display_bits_per_pixel_; | |
| 196 base::ScopedNativeLibrary opengl_library_; | |
| 197 CGLSetFullScreenFunc cgl_set_full_screen_; | |
| 198 | |
| 199 DISALLOW_COPY_AND_ASSIGN(VideoFrameCapturerMac); | |
| 200 }; | |
| 201 | |
| 202 VideoFrameMac::VideoFrameMac(const MacDesktopConfiguration& desktop_config) { | |
| 203 SkISize size = SkISize::Make(desktop_config.pixel_bounds.width(), | |
| 204 desktop_config.pixel_bounds.height()); | |
| 205 set_bytes_per_row(size.width() * sizeof(uint32_t)); | |
| 206 set_dimensions(size); | |
| 207 | |
| 208 size_t buffer_size = size.width() * size.height() * sizeof(uint32_t); | |
| 209 data_.reset(new uint8[buffer_size]); | |
| 210 set_pixels(data_.get()); | |
| 211 | |
| 212 dpi_ = SkIPoint::Make(kStandardDPI * desktop_config.dip_to_pixel_scale, | |
| 213 kStandardDPI * desktop_config.dip_to_pixel_scale); | |
| 214 } | |
| 215 | |
| 216 VideoFrameMac::~VideoFrameMac() { | |
| 217 } | |
| 218 | |
| 219 VideoFrameCapturerMac::VideoFrameCapturerMac() | |
| 220 : delegate_(NULL), | |
| 221 cgl_context_(NULL), | |
| 222 display_configuration_capture_event_(false, true), | |
| 223 power_assertion_id_display_(kIOPMNullAssertionID), | |
| 224 power_assertion_id_user_(kIOPMNullAssertionID), | |
| 225 cg_display_base_address_(NULL), | |
| 226 cg_display_bytes_per_row_(NULL), | |
| 227 cg_display_bits_per_pixel_(NULL), | |
| 228 cgl_set_full_screen_(NULL) | |
| 229 { | |
| 230 } | |
| 231 | |
| 232 VideoFrameCapturerMac::~VideoFrameCapturerMac() { | |
| 233 ReleaseBuffers(); | |
| 234 CGUnregisterScreenRefreshCallback( | |
| 235 VideoFrameCapturerMac::ScreenRefreshCallback, this); | |
| 236 CGScreenUnregisterMoveCallback( | |
| 237 VideoFrameCapturerMac::ScreenUpdateMoveCallback, this); | |
| 238 CGError err = CGDisplayRemoveReconfigurationCallback( | |
| 239 VideoFrameCapturerMac::DisplaysReconfiguredCallback, this); | |
| 240 if (err != kCGErrorSuccess) { | |
| 241 LOG(ERROR) << "CGDisplayRemoveReconfigurationCallback " << err; | |
| 242 } | |
| 243 } | |
| 244 | |
| 245 bool VideoFrameCapturerMac::Init() { | |
| 246 CGError err = CGRegisterScreenRefreshCallback( | |
| 247 VideoFrameCapturerMac::ScreenRefreshCallback, this); | |
| 248 if (err != kCGErrorSuccess) { | |
| 249 LOG(ERROR) << "CGRegisterScreenRefreshCallback " << err; | |
| 250 return false; | |
| 251 } | |
| 252 | |
| 253 err = CGScreenRegisterMoveCallback( | |
| 254 VideoFrameCapturerMac::ScreenUpdateMoveCallback, this); | |
| 255 if (err != kCGErrorSuccess) { | |
| 256 LOG(ERROR) << "CGScreenRegisterMoveCallback " << err; | |
| 257 return false; | |
| 258 } | |
| 259 err = CGDisplayRegisterReconfigurationCallback( | |
| 260 VideoFrameCapturerMac::DisplaysReconfiguredCallback, this); | |
| 261 if (err != kCGErrorSuccess) { | |
| 262 LOG(ERROR) << "CGDisplayRegisterReconfigurationCallback " << err; | |
| 263 return false; | |
| 264 } | |
| 265 | |
| 266 ScreenConfigurationChanged(); | |
| 267 return true; | |
| 268 } | |
| 269 | |
| 270 void VideoFrameCapturerMac::ReleaseBuffers() { | |
| 271 if (cgl_context_) { | |
| 272 pixel_buffer_object_.Release(); | |
| 273 CGLDestroyContext(cgl_context_); | |
| 274 cgl_context_ = NULL; | |
| 275 } | |
| 276 // The buffers might be in use by the encoder, so don't delete them here. | |
| 277 // Instead, mark them as "needs update"; next time the buffers are used by | |
| 278 // the capturer, they will be recreated if necessary. | |
| 279 queue_.SetAllFramesNeedUpdate(); | |
| 280 } | |
| 281 | |
| 282 void VideoFrameCapturerMac::Start(Delegate* delegate) { | |
| 283 DCHECK(delegate_ == NULL); | |
| 284 | |
| 285 delegate_ = delegate; | |
| 286 | |
| 287 // Create power management assertions to wake the display and prevent it from | |
| 288 // going to sleep on user idle. | |
| 289 // TODO(jamiewalch): Use IOPMAssertionDeclareUserActivity on 10.7.3 and above | |
| 290 // instead of the following two assertions. | |
| 291 IOPMAssertionCreateWithName(kIOPMAssertionTypeNoDisplaySleep, | |
| 292 kIOPMAssertionLevelOn, | |
| 293 CFSTR("Chrome Remote Desktop connection active"), | |
| 294 &power_assertion_id_display_); | |
| 295 // This assertion ensures that the display is woken up if it already asleep | |
| 296 // (as used by Apple Remote Desktop). | |
| 297 IOPMAssertionCreateWithName(CFSTR("UserIsActive"), | |
| 298 kIOPMAssertionLevelOn, | |
| 299 CFSTR("Chrome Remote Desktop connection active"), | |
| 300 &power_assertion_id_user_); | |
| 301 } | |
| 302 | |
| 303 void VideoFrameCapturerMac::Stop() { | |
| 304 if (power_assertion_id_display_ != kIOPMNullAssertionID) { | |
| 305 IOPMAssertionRelease(power_assertion_id_display_); | |
| 306 power_assertion_id_display_ = kIOPMNullAssertionID; | |
| 307 } | |
| 308 if (power_assertion_id_user_ != kIOPMNullAssertionID) { | |
| 309 IOPMAssertionRelease(power_assertion_id_user_); | |
| 310 power_assertion_id_user_ = kIOPMNullAssertionID; | |
| 311 } | |
| 312 } | |
| 313 | |
| 314 void VideoFrameCapturerMac::InvalidateRegion(const SkRegion& invalid_region) { | |
| 315 helper_.InvalidateRegion(invalid_region); | |
| 316 } | |
| 317 | |
| 318 void VideoFrameCapturerMac::CaptureFrame() { | |
| 319 // Only allow captures when the display configuration is not occurring. | |
| 320 scoped_refptr<CaptureData> data; | |
| 321 | |
| 322 base::Time capture_start_time = base::Time::Now(); | |
| 323 | |
| 324 // Wait until the display configuration is stable. If one or more displays | |
| 325 // are reconfiguring then |display_configuration_capture_event_| will not be | |
| 326 // set until the reconfiguration completes. | |
| 327 // TODO(wez): Replace this with an early-exit (See crbug.com/104542). | |
| 328 CHECK(display_configuration_capture_event_.TimedWait( | |
| 329 base::TimeDelta::FromSeconds( | |
| 330 kDisplayConfigurationEventTimeoutInSeconds))); | |
| 331 | |
| 332 SkRegion region; | |
| 333 helper_.SwapInvalidRegion(®ion); | |
| 334 | |
| 335 // If the current buffer is from an older generation then allocate a new one. | |
| 336 // Note that we can't reallocate other buffers at this point, since the caller | |
| 337 // may still be reading from them. | |
| 338 if (queue_.current_frame_needs_update()) { | |
| 339 scoped_ptr<VideoFrameMac> buffer(new VideoFrameMac(desktop_config_)); | |
| 340 queue_.ReplaceCurrentFrame(buffer.PassAs<VideoFrame>()); | |
| 341 } | |
| 342 | |
| 343 VideoFrame* current_buffer = queue_.current_frame(); | |
| 344 | |
| 345 bool flip = false; // GL capturers need flipping. | |
| 346 if (base::mac::IsOSLionOrLater()) { | |
| 347 // Lion requires us to use their new APIs for doing screen capture. These | |
| 348 // APIS currently crash on 10.6.8 if there is no monitor attached. | |
| 349 CgBlitPostLion(*current_buffer, region); | |
| 350 } else if (cgl_context_) { | |
| 351 flip = true; | |
| 352 if (pixel_buffer_object_.get() != 0) { | |
| 353 GlBlitFast(*current_buffer, region); | |
| 354 } else { | |
| 355 // See comment in ScopedPixelBufferObject::Init about why the slow | |
| 356 // path is always used on 10.5. | |
| 357 GlBlitSlow(*current_buffer); | |
| 358 } | |
| 359 } else { | |
| 360 CgBlitPreLion(*current_buffer, region); | |
| 361 } | |
| 362 | |
| 363 uint8* buffer = current_buffer->pixels(); | |
| 364 int stride = current_buffer->bytes_per_row(); | |
| 365 if (flip) { | |
| 366 stride = -stride; | |
| 367 buffer += (current_buffer->dimensions().height() - 1) * | |
| 368 current_buffer->bytes_per_row(); | |
| 369 } | |
| 370 | |
| 371 data = new CaptureData(buffer, stride, current_buffer->dimensions()); | |
| 372 data->set_dpi(static_cast<VideoFrameMac*>(current_buffer)->dpi()); | |
| 373 data->mutable_dirty_region() = region; | |
| 374 | |
| 375 helper_.set_size_most_recent(data->size()); | |
| 376 | |
| 377 // Signal that we are done capturing data from the display framebuffer, | |
| 378 // and accessing display structures. | |
| 379 display_configuration_capture_event_.Signal(); | |
| 380 | |
| 381 // Capture the current cursor shape and notify |delegate_| if it has changed. | |
| 382 CaptureCursor(); | |
| 383 | |
| 384 // Move the capture frame buffer queue on to the next buffer. | |
| 385 queue_.DoneWithCurrentFrame(); | |
| 386 | |
| 387 data->set_capture_time_ms( | |
| 388 (base::Time::Now() - capture_start_time).InMillisecondsRoundedUp()); | |
| 389 delegate_->OnCaptureCompleted(data); | |
| 390 } | |
| 391 | |
| 392 void VideoFrameCapturerMac::CaptureCursor() { | |
| 393 NSCursor* cursor = [NSCursor currentSystemCursor]; | |
| 394 if (cursor == nil) { | |
| 395 return; | |
| 396 } | |
| 397 | |
| 398 NSImage* nsimage = [cursor image]; | |
| 399 NSPoint hotspot = [cursor hotSpot]; | |
| 400 NSSize size = [nsimage size]; | |
| 401 CGImageRef image = [nsimage CGImageForProposedRect:NULL | |
| 402 context:nil | |
| 403 hints:nil]; | |
| 404 if (image == nil) { | |
| 405 return; | |
| 406 } | |
| 407 | |
| 408 if (CGImageGetBitsPerPixel(image) != 32 || | |
| 409 CGImageGetBytesPerRow(image) != (size.width * 4) || | |
| 410 CGImageGetBitsPerComponent(image) != 8) { | |
| 411 return; | |
| 412 } | |
| 413 | |
| 414 // Compare the current cursor with the last one we sent to the client | |
| 415 // and exit if the cursor is the same. | |
| 416 if (current_cursor_.get() != NULL) { | |
| 417 CGImageRef current = current_cursor_.get(); | |
| 418 if (CGImageGetWidth(image) == CGImageGetWidth(current) && | |
| 419 CGImageGetHeight(image) == CGImageGetHeight(current) && | |
| 420 CGImageGetBitsPerPixel(image) == CGImageGetBitsPerPixel(current) && | |
| 421 CGImageGetBytesPerRow(image) == CGImageGetBytesPerRow(current) && | |
| 422 CGImageGetBitsPerComponent(image) == | |
| 423 CGImageGetBitsPerComponent(current)) { | |
| 424 CGDataProviderRef provider_new = CGImageGetDataProvider(image); | |
| 425 base::mac::ScopedCFTypeRef<CFDataRef> data_ref_new( | |
| 426 CGDataProviderCopyData(provider_new)); | |
| 427 CGDataProviderRef provider_current = CGImageGetDataProvider(current); | |
| 428 base::mac::ScopedCFTypeRef<CFDataRef> data_ref_current( | |
| 429 CGDataProviderCopyData(provider_current)); | |
| 430 | |
| 431 if (data_ref_new.get() != NULL && data_ref_current.get() != NULL) { | |
| 432 int data_size = CFDataGetLength(data_ref_new); | |
| 433 CHECK(data_size == CFDataGetLength(data_ref_current)); | |
| 434 const uint8* data_new = CFDataGetBytePtr(data_ref_new); | |
| 435 const uint8* data_current = CFDataGetBytePtr(data_ref_current); | |
| 436 if (memcmp(data_new, data_current, data_size) == 0) { | |
| 437 return; | |
| 438 } | |
| 439 } | |
| 440 } | |
| 441 } | |
| 442 | |
| 443 // Record the last cursor image. | |
| 444 current_cursor_.reset(CGImageCreateCopy(image)); | |
| 445 | |
| 446 VLOG(3) << "Sending cursor: " << size.width << "x" << size.height; | |
| 447 | |
| 448 CGDataProviderRef provider = CGImageGetDataProvider(image); | |
| 449 base::mac::ScopedCFTypeRef<CFDataRef> image_data_ref( | |
| 450 CGDataProviderCopyData(provider)); | |
| 451 if (image_data_ref.get() == NULL) { | |
| 452 return; | |
| 453 } | |
| 454 const char* cursor_src_data = | |
| 455 reinterpret_cast<const char*>(CFDataGetBytePtr(image_data_ref)); | |
| 456 int data_size = CFDataGetLength(image_data_ref); | |
| 457 | |
| 458 // Create a MouseCursorShape that describes the cursor and pass it to | |
| 459 // the client. | |
| 460 scoped_ptr<MouseCursorShape> cursor_shape(new MouseCursorShape()); | |
| 461 cursor_shape->size.set(size.width, size.height); | |
| 462 cursor_shape->hotspot.set(hotspot.x, hotspot.y); | |
| 463 cursor_shape->data.assign(cursor_src_data, cursor_src_data + data_size); | |
| 464 | |
| 465 delegate_->OnCursorShapeChanged(cursor_shape.Pass()); | |
| 466 } | |
| 467 | |
| 468 void VideoFrameCapturerMac::GlBlitFast(const VideoFrame& buffer, | |
| 469 const SkRegion& region) { | |
| 470 const int buffer_height = buffer.dimensions().height(); | |
| 471 const int buffer_width = buffer.dimensions().width(); | |
| 472 | |
| 473 // Clip to the size of our current screen. | |
| 474 SkIRect clip_rect = SkIRect::MakeWH(buffer_width, buffer_height); | |
| 475 if (queue_.previous_frame()) { | |
| 476 // We are doing double buffer for the capture data so we just need to copy | |
| 477 // the invalid region from the previous capture in the current buffer. | |
| 478 // TODO(hclam): We can reduce the amount of copying here by subtracting | |
| 479 // |capturer_helper_|s region from |last_invalid_region_|. | |
| 480 // http://crbug.com/92354 | |
| 481 | |
| 482 // Since the image obtained from OpenGL is upside-down, need to do some | |
| 483 // magic here to copy the correct rectangle. | |
| 484 const int y_offset = (buffer_height - 1) * buffer.bytes_per_row(); | |
| 485 for(SkRegion::Iterator i(last_invalid_region_); !i.done(); i.next()) { | |
| 486 SkIRect copy_rect = i.rect(); | |
| 487 if (copy_rect.intersect(clip_rect)) { | |
| 488 CopyRect(queue_.previous_frame()->pixels() + y_offset, | |
| 489 -buffer.bytes_per_row(), | |
| 490 buffer.pixels() + y_offset, | |
| 491 -buffer.bytes_per_row(), | |
| 492 4, // Bytes for pixel for RGBA. | |
| 493 copy_rect); | |
| 494 } | |
| 495 } | |
| 496 } | |
| 497 last_invalid_region_ = region; | |
| 498 | |
| 499 CGLContextObj CGL_MACRO_CONTEXT = cgl_context_; | |
| 500 glBindBufferARB(GL_PIXEL_PACK_BUFFER_ARB, pixel_buffer_object_.get()); | |
| 501 glReadPixels(0, 0, buffer_width, buffer_height, GL_BGRA, GL_UNSIGNED_BYTE, 0); | |
| 502 GLubyte* ptr = static_cast<GLubyte*>( | |
| 503 glMapBufferARB(GL_PIXEL_PACK_BUFFER_ARB, GL_READ_ONLY_ARB)); | |
| 504 if (ptr == NULL) { | |
| 505 // If the buffer can't be mapped, assume that it's no longer valid and | |
| 506 // release it. | |
| 507 pixel_buffer_object_.Release(); | |
| 508 } else { | |
| 509 // Copy only from the dirty rects. Since the image obtained from OpenGL is | |
| 510 // upside-down we need to do some magic here to copy the correct rectangle. | |
| 511 const int y_offset = (buffer_height - 1) * buffer.bytes_per_row(); | |
| 512 for(SkRegion::Iterator i(region); !i.done(); i.next()) { | |
| 513 SkIRect copy_rect = i.rect(); | |
| 514 if (copy_rect.intersect(clip_rect)) { | |
| 515 CopyRect(ptr + y_offset, | |
| 516 -buffer.bytes_per_row(), | |
| 517 buffer.pixels() + y_offset, | |
| 518 -buffer.bytes_per_row(), | |
| 519 4, // Bytes for pixel for RGBA. | |
| 520 copy_rect); | |
| 521 } | |
| 522 } | |
| 523 } | |
| 524 if (!glUnmapBufferARB(GL_PIXEL_PACK_BUFFER_ARB)) { | |
| 525 // If glUnmapBuffer returns false, then the contents of the data store are | |
| 526 // undefined. This might be because the screen mode has changed, in which | |
| 527 // case it will be recreated in ScreenConfigurationChanged, but releasing | |
| 528 // the object here is the best option. Capturing will fall back on | |
| 529 // GlBlitSlow until such time as the pixel buffer object is recreated. | |
| 530 pixel_buffer_object_.Release(); | |
| 531 } | |
| 532 glBindBufferARB(GL_PIXEL_PACK_BUFFER_ARB, 0); | |
| 533 } | |
| 534 | |
| 535 void VideoFrameCapturerMac::GlBlitSlow(const VideoFrame& buffer) { | |
| 536 CGLContextObj CGL_MACRO_CONTEXT = cgl_context_; | |
| 537 glReadBuffer(GL_FRONT); | |
| 538 glPushClientAttrib(GL_CLIENT_PIXEL_STORE_BIT); | |
| 539 glPixelStorei(GL_PACK_ALIGNMENT, 4); // Force 4-byte alignment. | |
| 540 glPixelStorei(GL_PACK_ROW_LENGTH, 0); | |
| 541 glPixelStorei(GL_PACK_SKIP_ROWS, 0); | |
| 542 glPixelStorei(GL_PACK_SKIP_PIXELS, 0); | |
| 543 // Read a block of pixels from the frame buffer. | |
| 544 glReadPixels(0, 0, buffer.dimensions().width(), buffer.dimensions().height(), | |
| 545 GL_BGRA, GL_UNSIGNED_BYTE, buffer.pixels()); | |
| 546 glPopClientAttrib(); | |
| 547 } | |
| 548 | |
| 549 void VideoFrameCapturerMac::CgBlitPreLion(const VideoFrame& buffer, | |
| 550 const SkRegion& region) { | |
| 551 const int buffer_height = buffer.dimensions().height(); | |
| 552 | |
| 553 // Copy the entire contents of the previous capture buffer, to capture over. | |
| 554 // TODO(wez): Get rid of this as per crbug.com/145064, or implement | |
| 555 // crbug.com/92354. | |
| 556 if (queue_.previous_frame()) { | |
| 557 memcpy(buffer.pixels(), | |
| 558 queue_.previous_frame()->pixels(), | |
| 559 buffer.bytes_per_row() * buffer_height); | |
| 560 } | |
| 561 | |
| 562 for (size_t i = 0; i < desktop_config_.displays.size(); ++i) { | |
| 563 const MacDisplayConfiguration& display_config = desktop_config_.displays[i]; | |
| 564 | |
| 565 // Use deprecated APIs to determine the display buffer layout. | |
| 566 DCHECK(cg_display_base_address_ && cg_display_bytes_per_row_ && | |
| 567 cg_display_bits_per_pixel_); | |
| 568 uint8* display_base_address = | |
| 569 reinterpret_cast<uint8*>((*cg_display_base_address_)(display_config.id)); | |
| 570 CHECK(display_base_address); | |
| 571 int src_bytes_per_row = (*cg_display_bytes_per_row_)(display_config.id); | |
| 572 int src_bytes_per_pixel = | |
| 573 (*cg_display_bits_per_pixel_)(display_config.id) / 8; | |
| 574 | |
| 575 // Determine the display's position relative to the desktop, in pixels. | |
| 576 SkIRect display_bounds = display_config.pixel_bounds; | |
| 577 display_bounds.offset(-desktop_config_.pixel_bounds.left(), | |
| 578 -desktop_config_.pixel_bounds.top()); | |
| 579 | |
| 580 // Determine which parts of the blit region, if any, lay within the monitor. | |
| 581 SkRegion copy_region; | |
| 582 if (!copy_region.op(region, display_bounds, SkRegion::kIntersect_Op)) | |
| 583 continue; | |
| 584 | |
| 585 // Translate the region to be copied into display-relative coordinates. | |
| 586 copy_region.translate(-desktop_config_.pixel_bounds.left(), | |
| 587 -desktop_config_.pixel_bounds.top()); | |
| 588 | |
| 589 // Calculate where in the output buffer the display's origin is. | |
| 590 uint8* out_ptr = buffer.pixels() + | |
| 591 (display_bounds.left() * src_bytes_per_pixel) + | |
| 592 (display_bounds.top() * buffer.bytes_per_row()); | |
| 593 | |
| 594 // Copy the dirty region from the display buffer into our desktop buffer. | |
| 595 for(SkRegion::Iterator i(copy_region); !i.done(); i.next()) { | |
| 596 CopyRect(display_base_address, | |
| 597 src_bytes_per_row, | |
| 598 out_ptr, | |
| 599 buffer.bytes_per_row(), | |
| 600 src_bytes_per_pixel, | |
| 601 i.rect()); | |
| 602 } | |
| 603 } | |
| 604 } | |
| 605 | |
| 606 void VideoFrameCapturerMac::CgBlitPostLion(const VideoFrame& buffer, | |
| 607 const SkRegion& region) { | |
| 608 const int buffer_height = buffer.dimensions().height(); | |
| 609 | |
| 610 // Copy the entire contents of the previous capture buffer, to capture over. | |
| 611 // TODO(wez): Get rid of this as per crbug.com/145064, or implement | |
| 612 // crbug.com/92354. | |
| 613 if (queue_.previous_frame()) { | |
| 614 memcpy(buffer.pixels(), | |
| 615 queue_.previous_frame()->pixels(), | |
| 616 buffer.bytes_per_row() * buffer_height); | |
| 617 } | |
| 618 | |
| 619 for (size_t i = 0; i < desktop_config_.displays.size(); ++i) { | |
| 620 const MacDisplayConfiguration& display_config = desktop_config_.displays[i]; | |
| 621 | |
| 622 // Determine the display's position relative to the desktop, in pixels. | |
| 623 SkIRect display_bounds = display_config.pixel_bounds; | |
| 624 display_bounds.offset(-desktop_config_.pixel_bounds.left(), | |
| 625 -desktop_config_.pixel_bounds.top()); | |
| 626 | |
| 627 // Determine which parts of the blit region, if any, lay within the monitor. | |
| 628 SkRegion copy_region; | |
| 629 if (!copy_region.op(region, display_bounds, SkRegion::kIntersect_Op)) | |
| 630 continue; | |
| 631 | |
| 632 // Translate the region to be copied into display-relative coordinates. | |
| 633 copy_region.translate(-desktop_config_.pixel_bounds.left(), | |
| 634 -desktop_config_.pixel_bounds.top()); | |
| 635 | |
| 636 // Create an image containing a snapshot of the display. | |
| 637 base::mac::ScopedCFTypeRef<CGImageRef> image( | |
| 638 CGDisplayCreateImage(display_config.id)); | |
| 639 if (image.get() == NULL) | |
| 640 continue; | |
| 641 | |
| 642 // Request access to the raw pixel data via the image's DataProvider. | |
| 643 CGDataProviderRef provider = CGImageGetDataProvider(image); | |
| 644 base::mac::ScopedCFTypeRef<CFDataRef> data( | |
| 645 CGDataProviderCopyData(provider)); | |
| 646 if (data.get() == NULL) | |
| 647 continue; | |
| 648 | |
| 649 const uint8* display_base_address = CFDataGetBytePtr(data); | |
| 650 int src_bytes_per_row = CGImageGetBytesPerRow(image); | |
| 651 int src_bytes_per_pixel = CGImageGetBitsPerPixel(image) / 8; | |
| 652 | |
| 653 // Calculate where in the output buffer the display's origin is. | |
| 654 uint8* out_ptr = buffer.pixels() + | |
| 655 (display_bounds.left() * src_bytes_per_pixel) + | |
| 656 (display_bounds.top() * buffer.bytes_per_row()); | |
| 657 | |
| 658 // Copy the dirty region from the display buffer into our desktop buffer. | |
| 659 for(SkRegion::Iterator i(copy_region); !i.done(); i.next()) { | |
| 660 CopyRect(display_base_address, | |
| 661 src_bytes_per_row, | |
| 662 out_ptr, | |
| 663 buffer.bytes_per_row(), | |
| 664 src_bytes_per_pixel, | |
| 665 i.rect()); | |
| 666 } | |
| 667 } | |
| 668 } | |
| 669 | |
| 670 void VideoFrameCapturerMac::ScreenConfigurationChanged() { | |
| 671 // Release existing buffers, which will be of the wrong size. | |
| 672 ReleaseBuffers(); | |
| 673 | |
| 674 // Clear the dirty region, in case the display is down-sizing. | |
| 675 helper_.ClearInvalidRegion(); | |
| 676 | |
| 677 // Refresh the cached desktop configuration. | |
| 678 desktop_config_ = MacDesktopConfiguration::GetCurrent(); | |
| 679 | |
| 680 // Re-mark the entire desktop as dirty. | |
| 681 helper_.InvalidateScreen( | |
| 682 SkISize::Make(desktop_config_.pixel_bounds.width(), | |
| 683 desktop_config_.pixel_bounds.height())); | |
| 684 | |
| 685 // Make sure the frame buffers will be reallocated. | |
| 686 queue_.SetAllFramesNeedUpdate(); | |
| 687 | |
| 688 // CgBlitPostLion uses CGDisplayCreateImage() to snapshot each display's | |
| 689 // contents. Although the API exists in OS 10.6, it crashes the caller if | |
| 690 // the machine has no monitor connected, so we fall back to depcreated APIs | |
| 691 // when running on 10.6. | |
| 692 if (base::mac::IsOSLionOrLater()) { | |
| 693 LOG(INFO) << "Using CgBlitPostLion."; | |
| 694 // No need for any OpenGL support on Lion | |
| 695 return; | |
| 696 } | |
| 697 | |
| 698 // Dynamically link to the deprecated pre-Lion capture APIs. | |
| 699 std::string app_services_library_error; | |
| 700 FilePath app_services_path(kApplicationServicesLibraryName); | |
| 701 app_services_library_.Reset( | |
| 702 base::LoadNativeLibrary(app_services_path, &app_services_library_error)); | |
| 703 CHECK(app_services_library_.is_valid()) << app_services_library_error; | |
| 704 | |
| 705 std::string opengl_library_error; | |
| 706 FilePath opengl_path(kOpenGlLibraryName); | |
| 707 opengl_library_.Reset( | |
| 708 base::LoadNativeLibrary(opengl_path, &opengl_library_error)); | |
| 709 CHECK(opengl_library_.is_valid()) << opengl_library_error; | |
| 710 | |
| 711 cg_display_base_address_ = reinterpret_cast<CGDisplayBaseAddressFunc>( | |
| 712 app_services_library_.GetFunctionPointer("CGDisplayBaseAddress")); | |
| 713 cg_display_bytes_per_row_ = reinterpret_cast<CGDisplayBytesPerRowFunc>( | |
| 714 app_services_library_.GetFunctionPointer("CGDisplayBytesPerRow")); | |
| 715 cg_display_bits_per_pixel_ = reinterpret_cast<CGDisplayBitsPerPixelFunc>( | |
| 716 app_services_library_.GetFunctionPointer("CGDisplayBitsPerPixel")); | |
| 717 cgl_set_full_screen_ = reinterpret_cast<CGLSetFullScreenFunc>( | |
| 718 opengl_library_.GetFunctionPointer("CGLSetFullScreen")); | |
| 719 CHECK(cg_display_base_address_ && cg_display_bytes_per_row_ && | |
| 720 cg_display_bits_per_pixel_ && cgl_set_full_screen_); | |
| 721 | |
| 722 if (desktop_config_.displays.size() > 1) { | |
| 723 LOG(INFO) << "Using CgBlitPreLion (Multi-monitor)."; | |
| 724 return; | |
| 725 } | |
| 726 | |
| 727 CGDirectDisplayID mainDevice = CGMainDisplayID(); | |
| 728 if (!CGDisplayUsesOpenGLAcceleration(mainDevice)) { | |
| 729 LOG(INFO) << "Using CgBlitPreLion (OpenGL unavailable)."; | |
| 730 return; | |
| 731 } | |
| 732 | |
| 733 LOG(INFO) << "Using GlBlit"; | |
| 734 | |
| 735 CGLPixelFormatAttribute attributes[] = { | |
| 736 kCGLPFAFullScreen, | |
| 737 kCGLPFADisplayMask, | |
| 738 (CGLPixelFormatAttribute)CGDisplayIDToOpenGLDisplayMask(mainDevice), | |
| 739 (CGLPixelFormatAttribute)0 | |
| 740 }; | |
| 741 CGLPixelFormatObj pixel_format = NULL; | |
| 742 GLint matching_pixel_format_count = 0; | |
| 743 CGLError err = CGLChoosePixelFormat(attributes, | |
| 744 &pixel_format, | |
| 745 &matching_pixel_format_count); | |
| 746 DCHECK_EQ(err, kCGLNoError); | |
| 747 err = CGLCreateContext(pixel_format, NULL, &cgl_context_); | |
| 748 DCHECK_EQ(err, kCGLNoError); | |
| 749 CGLDestroyPixelFormat(pixel_format); | |
| 750 (*cgl_set_full_screen_)(cgl_context_); | |
| 751 CGLSetCurrentContext(cgl_context_); | |
| 752 | |
| 753 size_t buffer_size = desktop_config_.pixel_bounds.width() * | |
| 754 desktop_config_.pixel_bounds.height() * | |
| 755 sizeof(uint32_t); | |
| 756 pixel_buffer_object_.Init(cgl_context_, buffer_size); | |
| 757 } | |
| 758 | |
| 759 void VideoFrameCapturerMac::ScreenRefresh(CGRectCount count, | |
| 760 const CGRect* rect_array) { | |
| 761 if (desktop_config_.pixel_bounds.isEmpty()) { | |
| 762 return; | |
| 763 } | |
| 764 SkIRect skirect_array[count]; | |
| 765 | |
| 766 for (CGRectCount i = 0; i < count; ++i) { | |
| 767 SkRect sk_rect = gfx::CGRectToSkRect(rect_array[i]); | |
| 768 | |
| 769 // Convert from Density-Independent Pixel to physical pixel coordinates. | |
| 770 sk_rect = ScaleSkRect(sk_rect, desktop_config_.dip_to_pixel_scale); | |
| 771 sk_rect.round(&skirect_array[i]); | |
| 772 | |
| 773 // Translate from local desktop to capturer framebuffer coordinates. | |
| 774 skirect_array[i].offset(-desktop_config_.pixel_bounds.left(), | |
| 775 -desktop_config_.pixel_bounds.top()); | |
| 776 } | |
| 777 | |
| 778 SkRegion region; | |
| 779 region.setRects(skirect_array, count); | |
| 780 InvalidateRegion(region); | |
| 781 } | |
| 782 | |
| 783 void VideoFrameCapturerMac::ScreenUpdateMove(CGScreenUpdateMoveDelta delta, | |
| 784 size_t count, | |
| 785 const CGRect* rect_array) { | |
| 786 // Translate |rect_array| to identify the move's destination. | |
| 787 CGRect refresh_rects[count]; | |
| 788 for (CGRectCount i = 0; i < count; ++i) { | |
| 789 refresh_rects[i] = CGRectOffset(rect_array[i], delta.dX, delta.dY); | |
| 790 } | |
| 791 | |
| 792 // Currently we just treat move events the same as refreshes. | |
| 793 ScreenRefresh(count, refresh_rects); | |
| 794 } | |
| 795 | |
| 796 void VideoFrameCapturerMac::DisplaysReconfigured( | |
| 797 CGDirectDisplayID display, | |
| 798 CGDisplayChangeSummaryFlags flags) { | |
| 799 if (flags & kCGDisplayBeginConfigurationFlag) { | |
| 800 if (reconfiguring_displays_.empty()) { | |
| 801 // If this is the first display to start reconfiguring then wait on | |
| 802 // |display_configuration_capture_event_| to block the capture thread | |
| 803 // from accessing display memory until the reconfiguration completes. | |
| 804 CHECK(display_configuration_capture_event_.TimedWait( | |
| 805 base::TimeDelta::FromSeconds( | |
| 806 kDisplayConfigurationEventTimeoutInSeconds))); | |
| 807 } | |
| 808 | |
| 809 reconfiguring_displays_.insert(display); | |
| 810 } else { | |
| 811 reconfiguring_displays_.erase(display); | |
| 812 | |
| 813 if (reconfiguring_displays_.empty()) { | |
| 814 // If no other displays are reconfiguring then refresh capturer data | |
| 815 // structures and un-block the capturer thread. | |
| 816 ScreenConfigurationChanged(); | |
| 817 display_configuration_capture_event_.Signal(); | |
| 818 } | |
| 819 } | |
| 820 } | |
| 821 | |
| 822 void VideoFrameCapturerMac::ScreenRefreshCallback(CGRectCount count, | |
| 823 const CGRect* rect_array, | |
| 824 void* user_parameter) { | |
| 825 VideoFrameCapturerMac* capturer = reinterpret_cast<VideoFrameCapturerMac*>( | |
| 826 user_parameter); | |
| 827 if (capturer->desktop_config_.pixel_bounds.isEmpty()) { | |
| 828 capturer->ScreenConfigurationChanged(); | |
| 829 } | |
| 830 capturer->ScreenRefresh(count, rect_array); | |
| 831 } | |
| 832 | |
| 833 void VideoFrameCapturerMac::ScreenUpdateMoveCallback( | |
| 834 CGScreenUpdateMoveDelta delta, | |
| 835 size_t count, | |
| 836 const CGRect* rect_array, | |
| 837 void* user_parameter) { | |
| 838 VideoFrameCapturerMac* capturer = reinterpret_cast<VideoFrameCapturerMac*>( | |
| 839 user_parameter); | |
| 840 capturer->ScreenUpdateMove(delta, count, rect_array); | |
| 841 } | |
| 842 | |
| 843 void VideoFrameCapturerMac::DisplaysReconfiguredCallback( | |
| 844 CGDirectDisplayID display, | |
| 845 CGDisplayChangeSummaryFlags flags, | |
| 846 void* user_parameter) { | |
| 847 VideoFrameCapturerMac* capturer = reinterpret_cast<VideoFrameCapturerMac*>( | |
| 848 user_parameter); | |
| 849 capturer->DisplaysReconfigured(display, flags); | |
| 850 } | |
| 851 | |
| 852 } // namespace | |
| 853 | |
| 854 // static | |
| 855 scoped_ptr<VideoFrameCapturer> VideoFrameCapturer::Create() { | |
| 856 scoped_ptr<VideoFrameCapturerMac> capturer(new VideoFrameCapturerMac()); | |
| 857 if (!capturer->Init()) | |
| 858 capturer.reset(); | |
| 859 return capturer.PassAs<VideoFrameCapturer>(); | |
| 860 } | |
| 861 | |
| 862 // static | |
| 863 scoped_ptr<VideoFrameCapturer> VideoFrameCapturer::CreateWithFactory( | |
| 864 SharedBufferFactory* shared_buffer_factory) { | |
| 865 NOTIMPLEMENTED(); | |
| 866 return scoped_ptr<VideoFrameCapturer>(); | |
| 867 } | |
| 868 | |
| 869 } // namespace remoting | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 12047101:
Move screen capturers from remoting/capturer to media/video/capturer/screen (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src