Revert 269271 "Mac Video Capture Device: split VCD into VCD and ..."

media/video/capture/mac/video_capture_device_mac.mm

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "media/video/capture/mac/video_capture_device_mac.h"
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/message_loop/message_loop_proxy.h"
 #include "base/time/time.h"
 #import "media/video/capture/mac/avfoundation_glue.h"
 #import "media/video/capture/mac/platform_video_capturing_mac.h"
 #import "media/video/capture/mac/video_capture_device_avfoundation_mac.h"
 #import "media/video/capture/mac/video_capture_device_qtkit_mac.h"
 
 namespace media {
 
 const int kMinFrameRate = 1;
 const int kMaxFrameRate = 30;
 
 // In device identifiers, the USB VID and PID are stored in 4 bytes each.
 const size_t kVidPidSize = 4;
 
+// Some devices are not correctly supported in AVFoundation, f.i. Blackmagic,
+// see http://crbug.com/347371. The devices are identified by USB Vendor ID and
+// by a characteristic substring of the name, usually the vendor's name.
+const struct NameAndVid {
+  const char* vid;
+  const char* name;
+} kBlacklistedCameras[] = { { "a82c", "Blackmagic" } };
+
 const struct Resolution {
   const int width;
   const int height;
 } kQVGA = { 320, 240 },
   kVGA = { 640, 480 },
   kHD = { 1280, 720 };
 
 const struct Resolution* const kWellSupportedResolutions[] = {
   &kQVGA,
   &kVGA,
@@ skipping 19 matching lines @@
     if (diff < min_diff) {
       min_diff = diff;
       matched_width = kWellSupportedResolutions[i]->width;
       matched_height = kWellSupportedResolutions[i]->height;
     }
   }
   *width = matched_width;
   *height = matched_height;
 }
 
-// TODO(mcasas): Remove the following static methods when they are no longer
-// referenced from VideoCaptureDeviceFactory, i.e. when all OS platforms have
-// splitted the VideoCaptureDevice into VideoCaptureDevice and
-// VideoCaptureDeviceFactory.
-
-// static
-VideoCaptureDevice* VideoCaptureDevice::Create(const Name& device_name) {
-  NOTREACHED();
-  return NULL;
-}
-// static
+//static
 void VideoCaptureDevice::GetDeviceNames(Names* device_names) {
-  NOTREACHED();
+  // Loop through all available devices and add to |device_names|.
+  NSDictionary* capture_devices;
+  if (AVFoundationGlue::IsAVFoundationSupported()) {
+    bool is_any_device_blacklisted = false;
+    DVLOG(1) << "Enumerating video capture devices using AVFoundation";
+    capture_devices = [VideoCaptureDeviceAVFoundation deviceNames];
+    std::string device_vid;
+    // Enumerate all devices found by AVFoundation, translate the info for each
+    // to class Name and add it to |device_names|.
+    for (NSString* key in capture_devices) {
+      Name name([[capture_devices valueForKey:key] UTF8String],
+          [key UTF8String], Name::AVFOUNDATION);
+      device_names->push_back(name);
+      // Extract the device's Vendor ID and compare to all blacklisted ones.
+      device_vid = name.GetModel().substr(0, kVidPidSize);
+      for (size_t i = 0; i < arraysize(kBlacklistedCameras); ++i) {
+        is_any_device_blacklisted |=
+            !strcasecmp(device_vid.c_str(), kBlacklistedCameras[i].vid);
+        if (is_any_device_blacklisted)
+          break;
+      }
+    }
+    // If there is any device blacklisted in the system, walk the QTKit device
+    // list and add those devices with a blacklisted name to the |device_names|.
+    // AVFoundation and QTKit device lists partially overlap, so add a "QTKit"
+    // prefix to the latter ones to distinguish them from the AVFoundation ones.
+    if (is_any_device_blacklisted) {
+      capture_devices = [VideoCaptureDeviceQTKit deviceNames];
+      for (NSString* key in capture_devices) {
+        NSString* device_name = [capture_devices valueForKey:key];
+        for (size_t i = 0; i < arraysize(kBlacklistedCameras); ++i) {
+          if ([device_name rangeOfString:@(kBlacklistedCameras[i].name)
+                                 options:NSCaseInsensitiveSearch].length != 0) {
+            DVLOG(1) << "Enumerated blacklisted " << [device_name UTF8String];
+            Name name("QTKit " + std::string([device_name UTF8String]),
+                [key UTF8String], Name::QTKIT);
+            device_names->push_back(name);
+          }
+        }
+      }
+    }
+  } else {
+    DVLOG(1) << "Enumerating video capture devices using QTKit";
+    capture_devices = [VideoCaptureDeviceQTKit deviceNames];
+    for (NSString* key in capture_devices) {
+      Name name([[capture_devices valueForKey:key] UTF8String],
+          [key UTF8String], Name::QTKIT);
+      device_names->push_back(name);
+    }
+  }
 }
 
 // static
-void VideoCaptureDevice::GetDeviceSupportedFormats(
-    const Name& device,
-    VideoCaptureFormats* supported_formats) {
-  NOTREACHED();
+void VideoCaptureDevice::GetDeviceSupportedFormats(const Name& device,
+    VideoCaptureFormats* formats) {
+  if (device.capture_api_type() == Name::AVFOUNDATION) {
+    DVLOG(1) << "Enumerating video capture capabilities, AVFoundation";
+    [VideoCaptureDeviceAVFoundation getDevice:device
+                             supportedFormats:formats];
+  } else {
+    NOTIMPLEMENTED();
+  }
 }
 
 const std::string VideoCaptureDevice::Name::GetModel() const {
   // Both PID and VID are 4 characters.
   if (unique_id_.size() < 2 * kVidPidSize) {
     return "";
   }
 
   // The last characters of device id is a concatenation of VID and then PID.
   const size_t vid_location = unique_id_.size() - 2 * kVidPidSize;
   std::string id_vendor = unique_id_.substr(vid_location, kVidPidSize);
   const size_t pid_location = unique_id_.size() - kVidPidSize;
   std::string id_product = unique_id_.substr(pid_location, kVidPidSize);
 
   return id_vendor + ":" + id_product;
 }
 
+VideoCaptureDevice* VideoCaptureDevice::Create(const Name& device_name) {
+  VideoCaptureDeviceMac* capture_device =
+      new VideoCaptureDeviceMac(device_name);
+  if (!capture_device->Init()) {
+    LOG(ERROR) << "Could not initialize VideoCaptureDevice.";
+    delete capture_device;
+    capture_device = NULL;
+  }
+  return capture_device;
+}
+
 VideoCaptureDeviceMac::VideoCaptureDeviceMac(const Name& device_name)
     : device_name_(device_name),
       tried_to_square_pixels_(false),
       task_runner_(base::MessageLoopProxy::current()),
       state_(kNotInitialized),
       capture_device_(nil),
       weak_factory_(this) {
   final_resolution_selected_ = AVFoundationGlue::IsAVFoundationSupported();
 }
 
@@ skipping 63 matching lines @@
   DCHECK(state_ == kCapturing || state_ == kError) << state_;
   [capture_device_ stopCapture];
 
   [capture_device_ setCaptureDevice:nil];
   [capture_device_ setFrameReceiver:nil];
   client_.reset();
   state_ = kIdle;
   tried_to_square_pixels_ = false;
 }
 
-bool VideoCaptureDeviceMac::Init(
-    VideoCaptureDevice::Name::CaptureApiType capture_api_type) {
+bool VideoCaptureDeviceMac::Init() {
   DCHECK(task_runner_->BelongsToCurrentThread());
   DCHECK_EQ(state_, kNotInitialized);
 
-  if (capture_api_type == Name::AVFOUNDATION) {
+  // TODO(mcasas): The following check might not be necessary; if the device has
+  // disappeared after enumeration and before coming here, opening would just
+  // fail but not necessarily produce a crash.
+  Names device_names;
+  GetDeviceNames(&device_names);
+  Names::iterator it = device_names.begin();
+  for (; it != device_names.end(); ++it) {
+    if (it->id() == device_name_.id())
+      break;
+  }
+  if (it == device_names.end())
+    return false;
+
+  DCHECK_NE(it->capture_api_type(), Name::API_TYPE_UNKNOWN);
+  if (it->capture_api_type() == Name::AVFOUNDATION) {
     capture_device_ =
         [[VideoCaptureDeviceAVFoundation alloc] initWithFrameReceiver:this];
   } else {
     capture_device_ =
         [[VideoCaptureDeviceQTKit alloc] initWithFrameReceiver:this];
   }
 
   if (!capture_device_)
     return false;
 
@@ skipping 101 matching lines @@
  if (![capture_device_ setCaptureHeight:capture_format_.frame_size.height()
                                   width:capture_format_.frame_size.width()
                               frameRate:capture_format_.frame_rate]) {
    ReceiveError("Could not configure capture device.");
    return false;
  }
  return true;
 }
 
 } // namespace media