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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/host/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/base/capture_data.h" | |
| 25 #include "remoting/base/util.h" | |
| 26 #include "remoting/host/mac/scoped_pixel_buffer_object.h" | |
| 27 #include "remoting/host/video_frame.h" | |
| 28 #include "remoting/host/video_frame_capturer_helper.h" | |
| 29 #include "remoting/host/video_frame_queue.h" | |
| 30 #include "remoting/proto/control.pb.h" | |
| 31 | |
| 32 namespace remoting { | |
| 33 | |
| 34 namespace { | |
| 35 | |
| 36 // Definitions used to dynamic-link to deprecated OS 10.6 functions. | |
| 37 const char* kApplicationServicesLibraryName = | |
| 38 "/System/Library/Frameworks/ApplicationServices.framework/" | |
| 39 "ApplicationServices"; | |
| 40 typedef void* (*CGDisplayBaseAddressFunc)(CGDirectDisplayID); | |
| 41 typedef size_t (*CGDisplayBytesPerRowFunc)(CGDirectDisplayID); | |
| 42 typedef size_t (*CGDisplayBitsPerPixelFunc)(CGDirectDisplayID); | |
| 43 const char* kOpenGlLibraryName = | |
| 44 "/System/Library/Frameworks/OpenGL.framework/OpenGL"; | |
| 45 typedef CGLError (*CGLSetFullScreenFunc)(CGLContextObj); | |
| 46 | |
| 47 // skia/ext/skia_utils_mac.h only defines CGRectToSkRect(). | |
| 48 SkIRect CGRectToSkIRect(const CGRect& rect) { | |
| 49 SkIRect sk_rect = { | |
| 50 SkScalarRound(rect.origin.x), | |
| 51 SkScalarRound(rect.origin.y), | |
| 52 SkScalarRound(rect.origin.x + rect.size.width), | |
| 53 SkScalarRound(rect.origin.y + rect.size.height) | |
| 54 }; | |
| 55 return sk_rect; | |
| 56 } | |
| 57 | |
| 58 // The amount of time allowed for displays to reconfigure. | |
| 59 const int64 kDisplayConfigurationEventTimeoutInSeconds = 10; | |
| 60 | |
| 61 // A class representing a full-frame pixel buffer. | |
| 62 class VideoFrameMac : public VideoFrame { | |
| 63 public: | |
| 64 explicit VideoFrameMac(const SkISize& size); | |
| 65 virtual ~VideoFrameMac(); | |
| 66 | |
| 67 const SkIPoint& dpi() const { return dpi_; } | |
| 68 | |
| 69 private: | |
| 70 // Allocated pixel buffer. | |
| 71 scoped_array<uint8> data_; | |
| 72 | |
| 73 // DPI settings for this buffer. | |
| 74 SkIPoint dpi_; | |
| 75 | |
| 76 DISALLOW_COPY_AND_ASSIGN(VideoFrameMac); | |
| 77 }; | |
| 78 | |
| 79 // A class to perform video frame capturing for mac. | |
| 80 class VideoFrameCapturerMac : public VideoFrameCapturer { | |
| 81 public: | |
| 82 VideoFrameCapturerMac(); | |
| 83 virtual ~VideoFrameCapturerMac(); | |
| 84 | |
| 85 bool Init(); | |
| 86 | |
| 87 // Overridden from VideoFrameCapturer: | |
| 88 virtual void Start(Delegate* delegate) OVERRIDE; | |
| 89 virtual void Stop() OVERRIDE; | |
| 90 virtual media::VideoFrame::Format pixel_format() const OVERRIDE; | |
| 91 virtual void InvalidateRegion(const SkRegion& invalid_region) OVERRIDE; | |
| 92 virtual void CaptureFrame() OVERRIDE; | |
| 93 virtual const SkISize& size_most_recent() const OVERRIDE; | |
| 94 | |
| 95 private: | |
| 96 void CaptureCursor(); | |
| 97 | |
| 98 void GlBlitFast(const VideoFrame& buffer, const SkRegion& region); | |
| 99 void GlBlitSlow(const VideoFrame& buffer); | |
| 100 void CgBlitPreLion(const VideoFrame& buffer, const SkRegion& region); | |
| 101 void CgBlitPostLion(const VideoFrame& buffer, const SkRegion& region); | |
| 102 | |
| 103 // Called when the screen configuration is changed. | |
| 104 void ScreenConfigurationChanged(); | |
| 105 | |
| 106 void ScreenRefresh(CGRectCount count, const CGRect *rect_array); | |
| 107 void ScreenUpdateMove(CGScreenUpdateMoveDelta delta, | |
| 108 size_t count, | |
| 109 const CGRect *rect_array); | |
| 110 void DisplaysReconfigured(CGDirectDisplayID display, | |
| 111 CGDisplayChangeSummaryFlags flags); | |
| 112 static void ScreenRefreshCallback(CGRectCount count, | |
| 113 const CGRect *rect_array, | |
| 114 void *user_parameter); | |
| 115 static void ScreenUpdateMoveCallback(CGScreenUpdateMoveDelta delta, | |
| 116 size_t count, | |
| 117 const CGRect *rect_array, | |
| 118 void *user_parameter); | |
| 119 static void DisplaysReconfiguredCallback(CGDirectDisplayID display, | |
| 120 CGDisplayChangeSummaryFlags flags, | |
| 121 void *user_parameter); | |
| 122 | |
| 123 void ReleaseBuffers(); | |
| 124 | |
| 125 Delegate* delegate_; | |
| 126 | |
| 127 CGLContextObj cgl_context_; | |
| 128 ScopedPixelBufferObject pixel_buffer_object_; | |
| 129 | |
| 130 // Queue of the frames buffers. | |
| 131 VideoFrameQueue queue_; | |
| 132 | |
| 133 // Current display configuration. | |
| 134 std::vector<CGDirectDisplayID> display_ids_; | |
| 135 SkIRect desktop_bounds_; | |
| 136 | |
| 137 // A thread-safe list of invalid rectangles, and the size of the most | |
| 138 // recently captured screen. | |
| 139 VideoFrameCapturerHelper helper_; | |
| 140 | |
| 141 // Image of the last cursor that we sent to the client. | |
| 142 base::mac::ScopedCFTypeRef<CGImageRef> current_cursor_; | |
| 143 | |
| 144 // Contains an invalid region from the previous capture. | |
| 145 SkRegion last_invalid_region_; | |
| 146 | |
| 147 // Format of pixels returned in buffer. | |
| 148 media::VideoFrame::Format pixel_format_; | |
| 149 | |
| 150 // Used to ensure that frame captures do not take place while displays | |
| 151 // are being reconfigured. | |
| 152 base::WaitableEvent display_configuration_capture_event_; | |
| 153 | |
| 154 // Records the Ids of attached displays which are being reconfigured. | |
| 155 // Accessed on the thread on which we are notified of display events. | |
| 156 std::set<CGDirectDisplayID> reconfiguring_displays_; | |
| 157 | |
| 158 // Power management assertion to prevent the screen from sleeping. | |
| 159 IOPMAssertionID power_assertion_id_display_; | |
| 160 | |
| 161 // Power management assertion to indicate that the user is active. | |
| 162 IOPMAssertionID power_assertion_id_user_; | |
| 163 | |
| 164 // Dynamically link to deprecated APIs for Mac OS X 10.6 support. | |
| 165 base::ScopedNativeLibrary app_services_library_; | |
| 166 CGDisplayBaseAddressFunc cg_display_base_address_; | |
| 167 CGDisplayBytesPerRowFunc cg_display_bytes_per_row_; | |
| 168 CGDisplayBitsPerPixelFunc cg_display_bits_per_pixel_; | |
| 169 base::ScopedNativeLibrary opengl_library_; | |
| 170 CGLSetFullScreenFunc cgl_set_full_screen_; | |
| 171 | |
| 172 DISALLOW_COPY_AND_ASSIGN(VideoFrameCapturerMac); | |
| 173 }; | |
| 174 | |
| 175 VideoFrameMac::VideoFrameMac(const SkISize& size) { | |
| 176 set_bytes_per_row(size.width() * sizeof(uint32_t)); | |
| 177 set_dimensions(size); | |
| 178 | |
| 179 size_t buffer_size = size.width() * size.height() * sizeof(uint32_t); | |
| 180 data_.reset(new uint8[buffer_size]); | |
| 181 set_pixels(data_.get()); | |
| 182 | |
| 183 // TODO(wez): Move the ugly DPI code into a helper. | |
| 184 NSScreen* screen = [NSScreen mainScreen]; | |
| 185 NSDictionary* attr = [screen deviceDescription]; | |
| 186 NSSize resolution = [[attr objectForKey: NSDeviceResolution] sizeValue]; | |
| 187 dpi_.set(resolution.width, resolution.height); | |
| 188 } | |
| 189 | |
| 190 VideoFrameMac::~VideoFrameMac() { | |
| 191 } | |
| 192 | |
| 193 VideoFrameCapturerMac::VideoFrameCapturerMac() | |
| 194 : delegate_(NULL), | |
| 195 cgl_context_(NULL), | |
| 196 pixel_format_(media::VideoFrame::RGB32), | |
| 197 display_configuration_capture_event_(false, true), | |
| 198 power_assertion_id_display_(kIOPMNullAssertionID), | |
| 199 power_assertion_id_user_(kIOPMNullAssertionID), | |
| 200 cg_display_base_address_(NULL), | |
| 201 cg_display_bytes_per_row_(NULL), | |
| 202 cg_display_bits_per_pixel_(NULL), | |
| 203 cgl_set_full_screen_(NULL) | |
| 204 { | |
| 205 } | |
| 206 | |
| 207 VideoFrameCapturerMac::~VideoFrameCapturerMac() { | |
| 208 ReleaseBuffers(); | |
| 209 CGUnregisterScreenRefreshCallback( | |
| 210 VideoFrameCapturerMac::ScreenRefreshCallback, this); | |
| 211 CGScreenUnregisterMoveCallback( | |
| 212 VideoFrameCapturerMac::ScreenUpdateMoveCallback, this); | |
| 213 CGError err = CGDisplayRemoveReconfigurationCallback( | |
| 214 VideoFrameCapturerMac::DisplaysReconfiguredCallback, this); | |
| 215 if (err != kCGErrorSuccess) { | |
| 216 LOG(ERROR) << "CGDisplayRemoveReconfigurationCallback " << err; | |
| 217 } | |
| 218 } | |
| 219 | |
| 220 bool VideoFrameCapturerMac::Init() { | |
| 221 CGError err = CGRegisterScreenRefreshCallback( | |
| 222 VideoFrameCapturerMac::ScreenRefreshCallback, this); | |
| 223 if (err != kCGErrorSuccess) { | |
| 224 LOG(ERROR) << "CGRegisterScreenRefreshCallback " << err; | |
| 225 return false; | |
| 226 } | |
| 227 | |
| 228 err = CGScreenRegisterMoveCallback( | |
| 229 VideoFrameCapturerMac::ScreenUpdateMoveCallback, this); | |
| 230 if (err != kCGErrorSuccess) { | |
| 231 LOG(ERROR) << "CGScreenRegisterMoveCallback " << err; | |
| 232 return false; | |
| 233 } | |
| 234 err = CGDisplayRegisterReconfigurationCallback( | |
| 235 VideoFrameCapturerMac::DisplaysReconfiguredCallback, this); | |
| 236 if (err != kCGErrorSuccess) { | |
| 237 LOG(ERROR) << "CGDisplayRegisterReconfigurationCallback " << err; | |
| 238 return false; | |
| 239 } | |
| 240 | |
| 241 ScreenConfigurationChanged(); | |
| 242 return true; | |
| 243 } | |
| 244 | |
| 245 void VideoFrameCapturerMac::ReleaseBuffers() { | |
| 246 if (cgl_context_) { | |
| 247 pixel_buffer_object_.Release(); | |
| 248 CGLDestroyContext(cgl_context_); | |
| 249 cgl_context_ = NULL; | |
| 250 } | |
| 251 // The buffers might be in use by the encoder, so don't delete them here. | |
| 252 // Instead, mark them as "needs update"; next time the buffers are used by | |
| 253 // the capturer, they will be recreated if necessary. | |
| 254 queue_.SetAllFramesNeedUpdate(); | |
| 255 } | |
| 256 | |
| 257 void VideoFrameCapturerMac::Start(Delegate* delegate) { | |
| 258 DCHECK(delegate_ == NULL); | |
| 259 | |
| 260 delegate_ = delegate; | |
| 261 | |
| 262 // Create power management assertions to wake the display and prevent it from | |
| 263 // going to sleep on user idle. | |
| 264 // TODO(jamiewalch): Use IOPMAssertionDeclareUserActivity on 10.7.3 and above | |
| 265 // instead of the following two assertions. | |
| 266 IOPMAssertionCreateWithName(kIOPMAssertionTypeNoDisplaySleep, | |
| 267 kIOPMAssertionLevelOn, | |
| 268 CFSTR("Chrome Remote Desktop connection active"), | |
| 269 &power_assertion_id_display_); | |
| 270 // This assertion ensures that the display is woken up if it already asleep | |
| 271 // (as used by Apple Remote Desktop). | |
| 272 IOPMAssertionCreateWithName(CFSTR("UserIsActive"), | |
| 273 kIOPMAssertionLevelOn, | |
| 274 CFSTR("Chrome Remote Desktop connection active"), | |
| 275 &power_assertion_id_user_); | |
| 276 } | |
| 277 | |
| 278 void VideoFrameCapturerMac::Stop() { | |
| 279 if (power_assertion_id_display_ != kIOPMNullAssertionID) { | |
| 280 IOPMAssertionRelease(power_assertion_id_display_); | |
| 281 power_assertion_id_display_ = kIOPMNullAssertionID; | |
| 282 } | |
| 283 if (power_assertion_id_user_ != kIOPMNullAssertionID) { | |
| 284 IOPMAssertionRelease(power_assertion_id_user_); | |
| 285 power_assertion_id_user_ = kIOPMNullAssertionID; | |
| 286 } | |
| 287 } | |
| 288 | |
| 289 media::VideoFrame::Format VideoFrameCapturerMac::pixel_format() const { | |
| 290 return pixel_format_; | |
| 291 } | |
| 292 | |
| 293 void VideoFrameCapturerMac::InvalidateRegion(const SkRegion& invalid_region) { | |
| 294 helper_.InvalidateRegion(invalid_region); | |
| 295 } | |
| 296 | |
| 297 void VideoFrameCapturerMac::CaptureFrame() { | |
| 298 // Only allow captures when the display configuration is not occurring. | |
| 299 scoped_refptr<CaptureData> data; | |
| 300 | |
| 301 base::Time capture_start_time = base::Time::Now(); | |
| 302 | |
| 303 // Wait until the display configuration is stable. If one or more displays | |
| 304 // are reconfiguring then |display_configuration_capture_event_| will not be | |
| 305 // set until the reconfiguration completes. | |
| 306 // TODO(wez): Replace this with an early-exit (See crbug.com/104542). | |
| 307 CHECK(display_configuration_capture_event_.TimedWait( | |
| 308 base::TimeDelta::FromSeconds( | |
| 309 kDisplayConfigurationEventTimeoutInSeconds))); | |
| 310 | |
| 311 SkRegion region; | |
| 312 helper_.SwapInvalidRegion(®ion); | |
| 313 | |
| 314 // If the current buffer is from an older generation then allocate a new one. | |
| 315 // Note that we can't reallocate other buffers at this point, since the caller | |
| 316 // may still be reading from them. | |
| 317 if (queue_.current_frame_needs_update()) { | |
| 318 scoped_ptr<VideoFrameMac> buffer(new VideoFrameMac( | |
| 319 SkISize::Make(desktop_bounds_.width(), desktop_bounds_.height()))); | |
| 320 queue_.ReplaceCurrentFrame(buffer.PassAs<VideoFrame>()); | |
| 321 } | |
| 322 | |
| 323 VideoFrame* current_buffer = queue_.current_frame(); | |
| 324 | |
| 325 bool flip = false; // GL capturers need flipping. | |
| 326 if (base::mac::IsOSLionOrLater()) { | |
| 327 // Lion requires us to use their new APIs for doing screen capture. These | |
| 328 // APIS currently crash on 10.6.8 if there is no monitor attached. | |
| 329 CgBlitPostLion(*current_buffer, region); | |
| 330 } else if (cgl_context_) { | |
| 331 flip = true; | |
| 332 if (pixel_buffer_object_.get() != 0) { | |
| 333 GlBlitFast(*current_buffer, region); | |
| 334 } else { | |
| 335 // See comment in ScopedPixelBufferObject::Init about why the slow | |
| 336 // path is always used on 10.5. | |
| 337 GlBlitSlow(*current_buffer); | |
| 338 } | |
| 339 } else { | |
| 340 CgBlitPreLion(*current_buffer, region); | |
| 341 } | |
| 342 | |
| 343 DataPlanes planes; | |
| 344 planes.data[0] = current_buffer->pixels(); | |
| 345 planes.strides[0] = current_buffer->bytes_per_row(); | |
| 346 if (flip) { | |
| 347 planes.strides[0] = -planes.strides[0]; | |
| 348 planes.data[0] += (current_buffer->dimensions().height() - 1) * | |
| 349 current_buffer->bytes_per_row(); | |
| 350 } | |
| 351 | |
| 352 data = new CaptureData(planes, current_buffer->dimensions(), pixel_format()); | |
| 353 data->set_dpi(static_cast<VideoFrameMac*>(current_buffer)->dpi()); | |
| 354 data->mutable_dirty_region() = region; | |
| 355 | |
| 356 helper_.set_size_most_recent(data->size()); | |
| 357 | |
| 358 // Signal that we are done capturing data from the display framebuffer, | |
| 359 // and accessing display structures. | |
| 360 display_configuration_capture_event_.Signal(); | |
| 361 | |
| 362 // Capture the current cursor shape and notify |delegate_| if it has changed. | |
| 363 CaptureCursor(); | |
| 364 | |
| 365 // Move the capture frame buffer queue on to the next buffer. | |
| 366 queue_.DoneWithCurrentFrame(); | |
| 367 | |
| 368 data->set_capture_time_ms( | |
| 369 (base::Time::Now() - capture_start_time).InMillisecondsRoundedUp()); | |
| 370 delegate_->OnCaptureCompleted(data); | |
| 371 } | |
| 372 | |
| 373 void VideoFrameCapturerMac::CaptureCursor() { | |
| 374 NSCursor* cursor = [NSCursor currentSystemCursor]; | |
| 375 if (cursor == nil) { | |
| 376 return; | |
| 377 } | |
| 378 | |
| 379 NSImage* nsimage = [cursor image]; | |
| 380 NSPoint hotspot = [cursor hotSpot]; | |
| 381 NSSize size = [nsimage size]; | |
| 382 CGImageRef image = [nsimage CGImageForProposedRect:NULL | |
| 383 context:nil | |
| 384 hints:nil]; | |
| 385 if (image == nil) { | |
| 386 return; | |
| 387 } | |
| 388 | |
| 389 if (CGImageGetBitsPerPixel(image) != 32 || | |
| 390 CGImageGetBytesPerRow(image) != (size.width * 4) || | |
| 391 CGImageGetBitsPerComponent(image) != 8) { | |
| 392 return; | |
| 393 } | |
| 394 | |
| 395 // Compare the current cursor with the last one we sent to the client | |
| 396 // and exit if the cursor is the same. | |
| 397 if (current_cursor_.get() != NULL) { | |
| 398 CGImageRef current = current_cursor_.get(); | |
| 399 if (CGImageGetWidth(image) == CGImageGetWidth(current) && | |
| 400 CGImageGetHeight(image) == CGImageGetHeight(current) && | |
| 401 CGImageGetBitsPerPixel(image) == CGImageGetBitsPerPixel(current) && | |
| 402 CGImageGetBytesPerRow(image) == CGImageGetBytesPerRow(current) && | |
| 403 CGImageGetBitsPerComponent(image) == | |
| 404 CGImageGetBitsPerComponent(current)) { | |
| 405 CGDataProviderRef provider_new = CGImageGetDataProvider(image); | |
| 406 base::mac::ScopedCFTypeRef<CFDataRef> data_ref_new( | |
| 407 CGDataProviderCopyData(provider_new)); | |
| 408 CGDataProviderRef provider_current = CGImageGetDataProvider(current); | |
| 409 base::mac::ScopedCFTypeRef<CFDataRef> data_ref_current( | |
| 410 CGDataProviderCopyData(provider_current)); | |
| 411 | |
| 412 if (data_ref_new.get() != NULL && data_ref_current.get() != NULL) { | |
| 413 int data_size = CFDataGetLength(data_ref_new); | |
| 414 CHECK(data_size == CFDataGetLength(data_ref_current)); | |
| 415 const uint8* data_new = CFDataGetBytePtr(data_ref_new); | |
| 416 const uint8* data_current = CFDataGetBytePtr(data_ref_current); | |
| 417 if (memcmp(data_new, data_current, data_size) == 0) { | |
| 418 return; | |
| 419 } | |
| 420 } | |
| 421 } | |
| 422 } | |
| 423 | |
| 424 VLOG(3) << "Sending cursor: " << size.width << "x" << size.height; | |
| 425 | |
| 426 CGDataProviderRef provider = CGImageGetDataProvider(image); | |
| 427 base::mac::ScopedCFTypeRef<CFDataRef> image_data_ref( | |
| 428 CGDataProviderCopyData(provider)); | |
| 429 if (image_data_ref.get() == NULL) { | |
| 430 return; | |
| 431 } | |
| 432 const uint8* cursor_src_data = CFDataGetBytePtr(image_data_ref); | |
| 433 int data_size = CFDataGetLength(image_data_ref); | |
| 434 | |
| 435 // Create a CursorShapeInfo proto that describes the cursor and pass it to | |
| 436 // the client. | |
| 437 scoped_ptr<protocol::CursorShapeInfo> cursor_proto( | |
| 438 new protocol::CursorShapeInfo()); | |
| 439 cursor_proto->mutable_data()->resize(data_size); | |
| 440 uint8* cursor_tgt_data = const_cast<uint8*>(reinterpret_cast<const uint8*>( | |
| 441 cursor_proto->mutable_data()->data())); | |
| 442 | |
| 443 memcpy(cursor_tgt_data, cursor_src_data, data_size); | |
| 444 | |
| 445 cursor_proto->set_width(size.width); | |
| 446 cursor_proto->set_height(size.height); | |
| 447 cursor_proto->set_hotspot_x(hotspot.x); | |
| 448 cursor_proto->set_hotspot_y(hotspot.y); | |
| 449 delegate_->OnCursorShapeChanged(cursor_proto.Pass()); | |
| 450 | |
| 451 // Record the last cursor image that we sent. | |
| 452 current_cursor_.reset(CGImageCreateCopy(image)); | |
| 453 } | |
| 454 | |
| 455 void VideoFrameCapturerMac::GlBlitFast(const VideoFrame& buffer, | |
| 456 const SkRegion& region) { | |
| 457 const int buffer_height = buffer.dimensions().height(); | |
| 458 const int buffer_width = buffer.dimensions().width(); | |
| 459 | |
| 460 // Clip to the size of our current screen. | |
| 461 SkIRect clip_rect = SkIRect::MakeWH(buffer_width, buffer_height); | |
| 462 if (queue_.previous_frame()) { | |
| 463 // We are doing double buffer for the capture data so we just need to copy | |
| 464 // the invalid region from the previous capture in the current buffer. | |
| 465 // TODO(hclam): We can reduce the amount of copying here by subtracting | |
| 466 // |capturer_helper_|s region from |last_invalid_region_|. | |
| 467 // http://crbug.com/92354 | |
| 468 | |
| 469 // Since the image obtained from OpenGL is upside-down, need to do some | |
| 470 // magic here to copy the correct rectangle. | |
| 471 const int y_offset = (buffer_height - 1) * buffer.bytes_per_row(); | |
| 472 for(SkRegion::Iterator i(last_invalid_region_); !i.done(); i.next()) { | |
| 473 SkIRect copy_rect = i.rect(); | |
| 474 if (copy_rect.intersect(clip_rect)) { | |
| 475 CopyRect(queue_.previous_frame()->pixels() + y_offset, | |
| 476 -buffer.bytes_per_row(), | |
| 477 buffer.pixels() + y_offset, | |
| 478 -buffer.bytes_per_row(), | |
| 479 4, // Bytes for pixel for RGBA. | |
| 480 copy_rect); | |
| 481 } | |
| 482 } | |
| 483 } | |
| 484 last_invalid_region_ = region; | |
| 485 | |
| 486 CGLContextObj CGL_MACRO_CONTEXT = cgl_context_; | |
| 487 glBindBufferARB(GL_PIXEL_PACK_BUFFER_ARB, pixel_buffer_object_.get()); | |
| 488 glReadPixels(0, 0, buffer_width, buffer_height, GL_BGRA, GL_UNSIGNED_BYTE, 0); | |
| 489 GLubyte* ptr = static_cast<GLubyte*>( | |
| 490 glMapBufferARB(GL_PIXEL_PACK_BUFFER_ARB, GL_READ_ONLY_ARB)); | |
| 491 if (ptr == NULL) { | |
| 492 // If the buffer can't be mapped, assume that it's no longer valid and | |
| 493 // release it. | |
| 494 pixel_buffer_object_.Release(); | |
| 495 } else { | |
| 496 // Copy only from the dirty rects. Since the image obtained from OpenGL is | |
| 497 // upside-down we need to do some magic here to copy the correct rectangle. | |
| 498 const int y_offset = (buffer_height - 1) * buffer.bytes_per_row(); | |
| 499 for(SkRegion::Iterator i(region); !i.done(); i.next()) { | |
| 500 SkIRect copy_rect = i.rect(); | |
| 501 if (copy_rect.intersect(clip_rect)) { | |
| 502 CopyRect(ptr + y_offset, | |
| 503 -buffer.bytes_per_row(), | |
| 504 buffer.pixels() + y_offset, | |
| 505 -buffer.bytes_per_row(), | |
| 506 4, // Bytes for pixel for RGBA. | |
| 507 copy_rect); | |
| 508 } | |
| 509 } | |
| 510 } | |
| 511 if (!glUnmapBufferARB(GL_PIXEL_PACK_BUFFER_ARB)) { | |
| 512 // If glUnmapBuffer returns false, then the contents of the data store are | |
| 513 // undefined. This might be because the screen mode has changed, in which | |
| 514 // case it will be recreated in ScreenConfigurationChanged, but releasing | |
| 515 // the object here is the best option. Capturing will fall back on | |
| 516 // GlBlitSlow until such time as the pixel buffer object is recreated. | |
| 517 pixel_buffer_object_.Release(); | |
| 518 } | |
| 519 glBindBufferARB(GL_PIXEL_PACK_BUFFER_ARB, 0); | |
| 520 } | |
| 521 | |
| 522 void VideoFrameCapturerMac::GlBlitSlow(const VideoFrame& buffer) { | |
| 523 CGLContextObj CGL_MACRO_CONTEXT = cgl_context_; | |
| 524 glReadBuffer(GL_FRONT); | |
| 525 glPushClientAttrib(GL_CLIENT_PIXEL_STORE_BIT); | |
| 526 glPixelStorei(GL_PACK_ALIGNMENT, 4); // Force 4-byte alignment. | |
| 527 glPixelStorei(GL_PACK_ROW_LENGTH, 0); | |
| 528 glPixelStorei(GL_PACK_SKIP_ROWS, 0); | |
| 529 glPixelStorei(GL_PACK_SKIP_PIXELS, 0); | |
| 530 // Read a block of pixels from the frame buffer. | |
| 531 glReadPixels(0, 0, buffer.dimensions().width(), buffer.dimensions().height(), | |
| 532 GL_BGRA, GL_UNSIGNED_BYTE, buffer.pixels()); | |
| 533 glPopClientAttrib(); | |
| 534 } | |
| 535 | |
| 536 void VideoFrameCapturerMac::CgBlitPreLion(const VideoFrame& buffer, | |
| 537 const SkRegion& region) { | |
| 538 const int buffer_height = buffer.dimensions().height(); | |
| 539 | |
| 540 // Copy the entire contents of the previous capture buffer, to capture over. | |
| 541 // TODO(wez): Get rid of this as per crbug.com/145064, or implement | |
| 542 // crbug.com/92354. | |
| 543 if (queue_.previous_frame()) { | |
| 544 memcpy(buffer.pixels(), | |
| 545 queue_.previous_frame()->pixels(), | |
| 546 buffer.bytes_per_row() * buffer_height); | |
| 547 } | |
| 548 | |
| 549 for (unsigned int d = 0; d < display_ids_.size(); ++d) { | |
| 550 // Use deprecated APIs to determine the display buffer layout. | |
| 551 DCHECK(cg_display_base_address_ && cg_display_bytes_per_row_ && | |
| 552 cg_display_bits_per_pixel_); | |
| 553 uint8* display_base_address = | |
| 554 reinterpret_cast<uint8*>((*cg_display_base_address_)(display_ids_[d])); | |
| 555 CHECK(display_base_address); | |
| 556 int src_bytes_per_row = (*cg_display_bytes_per_row_)(display_ids_[d]); | |
| 557 int src_bytes_per_pixel = | |
| 558 (*cg_display_bits_per_pixel_)(display_ids_[d]) / 8; | |
| 559 | |
| 560 // Determine the position of the display in the buffer. | |
| 561 SkIRect display_bounds = CGRectToSkIRect(CGDisplayBounds(display_ids_[d])); | |
| 562 display_bounds.offset(-desktop_bounds_.left(), -desktop_bounds_.top()); | |
| 563 | |
| 564 // Determine which parts of the blit region, if any, lay within the monitor. | |
| 565 SkRegion copy_region; | |
| 566 if (!copy_region.op(region, display_bounds, SkRegion::kIntersect_Op)) | |
| 567 continue; | |
| 568 | |
| 569 // Translate the region to be copied into display-relative coordinates. | |
| 570 copy_region.translate(-display_bounds.left(), -display_bounds.top()); | |
| 571 | |
| 572 // Calculate where in the output buffer the display's origin is. | |
| 573 uint8* out_ptr = buffer.pixels() + | |
| 574 (display_bounds.left() * src_bytes_per_pixel) + | |
| 575 (display_bounds.top() * buffer.bytes_per_row()); | |
| 576 | |
| 577 // Copy the dirty region from the display buffer into our desktop buffer. | |
| 578 for(SkRegion::Iterator i(copy_region); !i.done(); i.next()) { | |
| 579 CopyRect(display_base_address, | |
| 580 src_bytes_per_row, | |
| 581 out_ptr, | |
| 582 buffer.bytes_per_row(), | |
| 583 src_bytes_per_pixel, | |
| 584 i.rect()); | |
| 585 } | |
| 586 } | |
| 587 } | |
| 588 | |
| 589 void VideoFrameCapturerMac::CgBlitPostLion(const VideoFrame& buffer, | |
| 590 const SkRegion& region) { | |
| 591 const int buffer_height = buffer.dimensions().height(); | |
| 592 | |
| 593 // Copy the entire contents of the previous capture buffer, to capture over. | |
| 594 // TODO(wez): Get rid of this as per crbug.com/145064, or implement | |
| 595 // crbug.com/92354. | |
| 596 if (queue_.previous_frame()) { | |
| 597 memcpy(buffer.pixels(), | |
| 598 queue_.previous_frame()->pixels(), | |
| 599 buffer.bytes_per_row() * buffer_height); | |
| 600 } | |
| 601 | |
| 602 for (unsigned int d = 0; d < display_ids_.size(); ++d) { | |
| 603 // Determine the position of the display in the buffer. | |
| 604 SkIRect display_bounds = CGRectToSkIRect(CGDisplayBounds(display_ids_[d])); | |
| 605 display_bounds.offset(-desktop_bounds_.left(), -desktop_bounds_.top()); | |
| 606 | |
| 607 // Determine which parts of the blit region, if any, lay within the monitor. | |
| 608 SkRegion copy_region; | |
| 609 if (!copy_region.op(region, display_bounds, SkRegion::kIntersect_Op)) | |
| 610 continue; | |
| 611 | |
| 612 // Translate the region to be copied into display-relative coordinates. | |
| 613 copy_region.translate(-display_bounds.left(), -display_bounds.top()); | |
| 614 | |
| 615 // Create an image containing a snapshot of the display. | |
| 616 base::mac::ScopedCFTypeRef<CGImageRef> image( | |
| 617 CGDisplayCreateImage(display_ids_[d])); | |
| 618 if (image.get() == NULL) | |
| 619 continue; | |
| 620 | |
| 621 // Request access to the raw pixel data via the image's DataProvider. | |
| 622 CGDataProviderRef provider = CGImageGetDataProvider(image); | |
| 623 base::mac::ScopedCFTypeRef<CFDataRef> data( | |
| 624 CGDataProviderCopyData(provider)); | |
| 625 if (data.get() == NULL) | |
| 626 continue; | |
| 627 | |
| 628 const uint8* display_base_address = CFDataGetBytePtr(data); | |
| 629 int src_bytes_per_row = CGImageGetBytesPerRow(image); | |
| 630 int src_bytes_per_pixel = CGImageGetBitsPerPixel(image) / 8; | |
| 631 | |
| 632 // Calculate where in the output buffer the display's origin is. | |
| 633 uint8* out_ptr = buffer.pixels() + | |
| 634 (display_bounds.left() * src_bytes_per_pixel) + | |
| 635 (display_bounds.top() * buffer.bytes_per_row()); | |
| 636 | |
| 637 // Copy the dirty region from the display buffer into our desktop buffer. | |
| 638 for(SkRegion::Iterator i(copy_region); !i.done(); i.next()) { | |
| 639 CopyRect(display_base_address, | |
| 640 src_bytes_per_row, | |
| 641 out_ptr, | |
| 642 buffer.bytes_per_row(), | |
| 643 src_bytes_per_pixel, | |
| 644 i.rect()); | |
| 645 } | |
| 646 } | |
| 647 } | |
| 648 | |
| 649 const SkISize& VideoFrameCapturerMac::size_most_recent() const { | |
| 650 return helper_.size_most_recent(); | |
| 651 } | |
| 652 | |
| 653 void VideoFrameCapturerMac::ScreenConfigurationChanged() { | |
| 654 // Release existing buffers, which will be of the wrong size. | |
| 655 ReleaseBuffers(); | |
| 656 | |
| 657 // Clear the dirty region, in case the display is down-sizing. | |
| 658 helper_.ClearInvalidRegion(); | |
| 659 | |
| 660 // Fetch the list if active displays and calculate their bounds. | |
| 661 CGDisplayCount display_count; | |
| 662 CGError error = CGGetActiveDisplayList(0, NULL, &display_count); | |
| 663 CHECK_EQ(error, CGDisplayNoErr); | |
| 664 | |
| 665 display_ids_.resize(display_count); | |
| 666 error = CGGetActiveDisplayList(display_count, &display_ids_[0], | |
| 667 &display_count); | |
| 668 CHECK_EQ(error, CGDisplayNoErr); | |
| 669 CHECK_EQ(display_count, display_ids_.size()); | |
| 670 | |
| 671 desktop_bounds_ = SkIRect::MakeEmpty(); | |
| 672 for (unsigned int d = 0; d < display_count; ++d) { | |
| 673 CGRect display_bounds = CGDisplayBounds(display_ids_[d]); | |
| 674 desktop_bounds_.join(CGRectToSkIRect(display_bounds)); | |
| 675 } | |
| 676 | |
| 677 // Re-mark the entire desktop as dirty. | |
| 678 helper_.InvalidateScreen(SkISize::Make(desktop_bounds_.width(), | |
| 679 desktop_bounds_.height())); | |
| 680 | |
| 681 // Make sure the frame buffers will be reallocated. | |
| 682 queue_.SetAllFramesNeedUpdate(); | |
| 683 | |
| 684 // CgBlitPostLion uses CGDisplayCreateImage() to snapshot each display's | |
| 685 // contents. Although the API exists in OS 10.6, it crashes the caller if | |
| 686 // the machine has no monitor connected, so we fall back to depcreated APIs | |
| 687 // when running on 10.6. | |
| 688 if (base::mac::IsOSLionOrLater()) { | |
| 689 LOG(INFO) << "Using CgBlitPostLion."; | |
| 690 // No need for any OpenGL support on Lion | |
| 691 return; | |
| 692 } | |
| 693 | |
| 694 // Dynamically link to the deprecated pre-Lion capture APIs. | |
| 695 std::string app_services_library_error; | |
| 696 FilePath app_services_path(kApplicationServicesLibraryName); | |
| 697 app_services_library_.Reset( | |
| 698 base::LoadNativeLibrary(app_services_path, &app_services_library_error)); | |
| 699 CHECK(app_services_library_.is_valid()) << app_services_library_error; | |
| 700 | |
| 701 std::string opengl_library_error; | |
| 702 FilePath opengl_path(kOpenGlLibraryName); | |
| 703 opengl_library_.Reset( | |
| 704 base::LoadNativeLibrary(opengl_path, &opengl_library_error)); | |
| 705 CHECK(opengl_library_.is_valid()) << opengl_library_error; | |
| 706 | |
| 707 cg_display_base_address_ = reinterpret_cast<CGDisplayBaseAddressFunc>( | |
| 708 app_services_library_.GetFunctionPointer("CGDisplayBaseAddress")); | |
| 709 cg_display_bytes_per_row_ = reinterpret_cast<CGDisplayBytesPerRowFunc>( | |
| 710 app_services_library_.GetFunctionPointer("CGDisplayBytesPerRow")); | |
| 711 cg_display_bits_per_pixel_ = reinterpret_cast<CGDisplayBitsPerPixelFunc>( | |
| 712 app_services_library_.GetFunctionPointer("CGDisplayBitsPerPixel")); | |
| 713 cgl_set_full_screen_ = reinterpret_cast<CGLSetFullScreenFunc>( | |
| 714 opengl_library_.GetFunctionPointer("CGLSetFullScreen")); | |
| 715 CHECK(cg_display_base_address_ && cg_display_bytes_per_row_ && | |
| 716 cg_display_bits_per_pixel_ && cgl_set_full_screen_); | |
| 717 | |
| 718 if (display_ids_.size() > 1) { | |
| 719 LOG(INFO) << "Using CgBlitPreLion (Multi-monitor)."; | |
| 720 return; | |
| 721 } | |
| 722 | |
| 723 CGDirectDisplayID mainDevice = CGMainDisplayID(); | |
| 724 if (!CGDisplayUsesOpenGLAcceleration(mainDevice)) { | |
| 725 LOG(INFO) << "Using CgBlitPreLion (OpenGL unavailable)."; | |
| 726 return; | |
| 727 } | |
| 728 | |
| 729 LOG(INFO) << "Using GlBlit"; | |
| 730 | |
| 731 CGLPixelFormatAttribute attributes[] = { | |
| 732 kCGLPFAFullScreen, | |
| 733 kCGLPFADisplayMask, | |
| 734 (CGLPixelFormatAttribute)CGDisplayIDToOpenGLDisplayMask(mainDevice), | |
| 735 (CGLPixelFormatAttribute)0 | |
| 736 }; | |
| 737 CGLPixelFormatObj pixel_format = NULL; | |
| 738 GLint matching_pixel_format_count = 0; | |
| 739 CGLError err = CGLChoosePixelFormat(attributes, | |
| 740 &pixel_format, | |
| 741 &matching_pixel_format_count); | |
| 742 DCHECK_EQ(err, kCGLNoError); | |
| 743 err = CGLCreateContext(pixel_format, NULL, &cgl_context_); | |
| 744 DCHECK_EQ(err, kCGLNoError); | |
| 745 CGLDestroyPixelFormat(pixel_format); | |
| 746 (*cgl_set_full_screen_)(cgl_context_); | |
| 747 CGLSetCurrentContext(cgl_context_); | |
| 748 | |
| 749 size_t buffer_size = desktop_bounds_.width() * desktop_bounds_.height() * | |
| 750 sizeof(uint32_t); | |
| 751 pixel_buffer_object_.Init(cgl_context_, buffer_size); | |
| 752 } | |
| 753 | |
| 754 void VideoFrameCapturerMac::ScreenRefresh(CGRectCount count, | |
| 755 const CGRect* rect_array) { | |
| 756 if (desktop_bounds_.isEmpty()) { | |
| 757 return; | |
| 758 } | |
| 759 SkIRect skirect_array[count]; | |
| 760 for (CGRectCount i = 0; i < count; ++i) { | |
| 761 skirect_array[i] = CGRectToSkIRect(rect_array[i]); | |
| 762 skirect_array[i].offset(-desktop_bounds_.left(), -desktop_bounds_.top()); | |
| 763 } | |
| 764 SkRegion region; | |
| 765 region.setRects(skirect_array, count); | |
| 766 InvalidateRegion(region); | |
| 767 } | |
| 768 | |
| 769 void VideoFrameCapturerMac::ScreenUpdateMove(CGScreenUpdateMoveDelta delta, | |
| 770 size_t count, | |
| 771 const CGRect* rect_array) { | |
| 772 SkIRect skirect_array[count]; | |
| 773 for (CGRectCount i = 0; i < count; ++i) { | |
| 774 CGRect rect = rect_array[i]; | |
| 775 rect = CGRectOffset(rect, delta.dX, delta.dY); | |
| 776 skirect_array[i] = CGRectToSkIRect(rect); | |
| 777 skirect_array[i].offset(-desktop_bounds_.left(), -desktop_bounds_.top()); | |
| 778 } | |
| 779 SkRegion region; | |
| 780 region.setRects(skirect_array, count); | |
| 781 InvalidateRegion(region); | |
| 782 } | |
| 783 | |
| 784 void VideoFrameCapturerMac::DisplaysReconfigured( | |
| 785 CGDirectDisplayID display, | |
| 786 CGDisplayChangeSummaryFlags flags) { | |
| 787 if (flags & kCGDisplayBeginConfigurationFlag) { | |
| 788 if (reconfiguring_displays_.empty()) { | |
| 789 // If this is the first display to start reconfiguring then wait on | |
| 790 // |display_configuration_capture_event_| to block the capture thread | |
| 791 // from accessing display memory until the reconfiguration completes. | |
| 792 CHECK(display_configuration_capture_event_.TimedWait( | |
| 793 base::TimeDelta::FromSeconds( | |
| 794 kDisplayConfigurationEventTimeoutInSeconds))); | |
| 795 } | |
| 796 | |
| 797 reconfiguring_displays_.insert(display); | |
| 798 } else { | |
| 799 reconfiguring_displays_.erase(display); | |
| 800 | |
| 801 if (reconfiguring_displays_.empty()) { | |
| 802 // If no other displays are reconfiguring then refresh capturer data | |
| 803 // structures and un-block the capturer thread. | |
| 804 ScreenConfigurationChanged(); | |
| 805 display_configuration_capture_event_.Signal(); | |
| 806 } | |
| 807 } | |
| 808 } | |
| 809 | |
| 810 void VideoFrameCapturerMac::ScreenRefreshCallback(CGRectCount count, | |
| 811 const CGRect* rect_array, | |
| 812 void* user_parameter) { | |
| 813 VideoFrameCapturerMac* capturer = reinterpret_cast<VideoFrameCapturerMac*>( | |
| 814 user_parameter); | |
| 815 if (capturer->desktop_bounds_.isEmpty()) { | |
| 816 capturer->ScreenConfigurationChanged(); | |
| 817 } | |
| 818 capturer->ScreenRefresh(count, rect_array); | |
| 819 } | |
| 820 | |
| 821 void VideoFrameCapturerMac::ScreenUpdateMoveCallback( | |
| 822 CGScreenUpdateMoveDelta delta, | |
| 823 size_t count, | |
| 824 const CGRect* rect_array, | |
| 825 void* user_parameter) { | |
| 826 VideoFrameCapturerMac* capturer = reinterpret_cast<VideoFrameCapturerMac*>( | |
| 827 user_parameter); | |
| 828 capturer->ScreenUpdateMove(delta, count, rect_array); | |
| 829 } | |
| 830 | |
| 831 void VideoFrameCapturerMac::DisplaysReconfiguredCallback( | |
| 832 CGDirectDisplayID display, | |
| 833 CGDisplayChangeSummaryFlags flags, | |
| 834 void* user_parameter) { | |
| 835 VideoFrameCapturerMac* capturer = reinterpret_cast<VideoFrameCapturerMac*>( | |
| 836 user_parameter); | |
| 837 capturer->DisplaysReconfigured(display, flags); | |
| 838 } | |
| 839 | |
| 840 } // namespace | |
| 841 | |
| 842 // static | |
| 843 scoped_ptr<VideoFrameCapturer> VideoFrameCapturer::Create() { | |
| 844 scoped_ptr<VideoFrameCapturerMac> capturer(new VideoFrameCapturerMac()); | |
| 845 if (!capturer->Init()) | |
| 846 capturer.reset(); | |
| 847 return capturer.PassAs<VideoFrameCapturer>(); | |
| 848 } | |
| 849 | |
| 850 // static | |
| 851 scoped_ptr<VideoFrameCapturer> VideoFrameCapturer::CreateWithFactory( | |
| 852 SharedBufferFactory* shared_buffer_factory) { | |
| 853 NOTIMPLEMENTED(); | |
| 854 return scoped_ptr<VideoFrameCapturer>(); | |
| 855 } | |
| 856 | |
| 857 } // namespace remoting | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 11470028:
Move screen capturers to remoting/capturer. (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src