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      1 // Copyright 2014 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 "media/video/capture/android/video_capture_device_factory_android.h"
      6 
      7 #include "base/android/jni_string.h"
      8 #include "base/android/scoped_java_ref.h"
      9 #include "base/strings/string_number_conversions.h"
     10 #include "base/strings/stringprintf.h"
     11 #include "jni/VideoCaptureFactory_jni.h"
     12 #include "media/video/capture/android/video_capture_device_android.h"
     13 
     14 using base::android::AttachCurrentThread;
     15 using base::android::ScopedJavaLocalRef;
     16 
     17 namespace media {
     18 
     19 // static
     20 bool VideoCaptureDeviceFactoryAndroid::RegisterVideoCaptureDeviceFactory(
     21     JNIEnv* env) {
     22   return RegisterNativesImpl(env);
     23 }
     24 
     25 //static
     26 ScopedJavaLocalRef<jobject>
     27 VideoCaptureDeviceFactoryAndroid::createVideoCaptureAndroid(
     28     int id,
     29     jlong nativeVideoCaptureDeviceAndroid) {
     30   return (Java_VideoCaptureFactory_createVideoCapture(
     31       AttachCurrentThread(),
     32       base::android::GetApplicationContext(),
     33       id,
     34       nativeVideoCaptureDeviceAndroid));
     35 }
     36 
     37 scoped_ptr<VideoCaptureDevice> VideoCaptureDeviceFactoryAndroid::Create(
     38     const VideoCaptureDevice::Name& device_name) {
     39   DCHECK(thread_checker_.CalledOnValidThread());
     40   int id;
     41   if (!base::StringToInt(device_name.id(), &id))
     42     return scoped_ptr<VideoCaptureDevice>();
     43 
     44   VideoCaptureDeviceAndroid* video_capture_device(
     45       new VideoCaptureDeviceAndroid(device_name));
     46 
     47   if (video_capture_device->Init())
     48     return scoped_ptr<VideoCaptureDevice>(video_capture_device);
     49 
     50   DLOG(ERROR) << "Error creating Video Capture Device.";
     51   return scoped_ptr<VideoCaptureDevice>();
     52 }
     53 
     54 void VideoCaptureDeviceFactoryAndroid::GetDeviceNames(
     55     VideoCaptureDevice::Names* device_names) {
     56   DCHECK(thread_checker_.CalledOnValidThread());
     57   device_names->clear();
     58 
     59   JNIEnv* env = AttachCurrentThread();
     60 
     61   int num_cameras = Java_ChromiumCameraInfo_getNumberOfCameras(
     62       env, base::android::GetApplicationContext());
     63   DVLOG(1) << "VideoCaptureDevice::GetDeviceNames: num_cameras=" << num_cameras;
     64   if (num_cameras <= 0)
     65     return;
     66 
     67   for (int camera_id = num_cameras - 1; camera_id >= 0; --camera_id) {
     68     ScopedJavaLocalRef<jobject> ci =
     69         Java_ChromiumCameraInfo_getAt(env, camera_id);
     70 
     71     VideoCaptureDevice::Name name(
     72         base::android::ConvertJavaStringToUTF8(
     73             Java_ChromiumCameraInfo_getDeviceName(env, ci.obj())),
     74         base::StringPrintf("%d", Java_ChromiumCameraInfo_getId(env, ci.obj())));
     75     device_names->push_back(name);
     76 
     77     DVLOG(1) << "VideoCaptureDeviceFactoryAndroid::GetDeviceNames: camera"
     78              << "device_name=" << name.name() << ", unique_id=" << name.id()
     79              << ", orientation "
     80              << Java_ChromiumCameraInfo_getOrientation(env, ci.obj());
     81   }
     82 }
     83 
     84 void VideoCaptureDeviceFactoryAndroid::GetDeviceSupportedFormats(
     85     const VideoCaptureDevice::Name& device,
     86     VideoCaptureFormats* capture_formats) {
     87   DCHECK(thread_checker_.CalledOnValidThread());
     88   int id;
     89   if (!base::StringToInt(device.id(), &id))
     90     return;
     91   JNIEnv* env = AttachCurrentThread();
     92   base::android::ScopedJavaLocalRef<jobjectArray> collected_formats =
     93       Java_VideoCaptureFactory_getDeviceSupportedFormats(env, id);
     94   if (collected_formats.is_null())
     95     return;
     96 
     97   jsize num_formats = env->GetArrayLength(collected_formats.obj());
     98   for (int i = 0; i < num_formats; ++i) {
     99     base::android::ScopedJavaLocalRef<jobject> format(
    100         env, env->GetObjectArrayElement(collected_formats.obj(), i));
    101 
    102     VideoPixelFormat pixel_format = media::PIXEL_FORMAT_UNKNOWN;
    103     switch (media::Java_VideoCaptureFactory_getCaptureFormatPixelFormat(
    104         env, format.obj())) {
    105       case ANDROID_IMAGEFORMAT_YV12:
    106         pixel_format = media::PIXEL_FORMAT_YV12;
    107         break;
    108       case ANDROID_IMAGEFORMAT_NV21:
    109         pixel_format = media::PIXEL_FORMAT_NV21;
    110         break;
    111       default:
    112         break;
    113     }
    114     VideoCaptureFormat capture_format(
    115         gfx::Size(media::Java_VideoCaptureFactory_getCaptureFormatWidth(env,
    116                       format.obj()),
    117                   media::Java_VideoCaptureFactory_getCaptureFormatHeight(env,
    118                       format.obj())),
    119         media::Java_VideoCaptureFactory_getCaptureFormatFramerate(env,
    120                                                                   format.obj()),
    121         pixel_format);
    122     capture_formats->push_back(capture_format);
    123     DVLOG(1) << device.name() << " " << capture_format.ToString();
    124   }
    125 }
    126 
    127 }  // namespace media
    128