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/*
* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "webrtc/modules/video_capture/android/video_capture_android.h"
#include "webrtc/modules/utility/interface/helpers_android.h"
#include "webrtc/modules/video_capture/android/device_info_android.h"
#include "webrtc/system_wrappers/interface/critical_section_wrapper.h"
#include "webrtc/system_wrappers/interface/logcat_trace_context.h"
#include "webrtc/system_wrappers/interface/ref_count.h"
#include "webrtc/system_wrappers/interface/trace.h"
static JavaVM* g_jvm = NULL;
static jclass g_java_capturer_class = NULL; // VideoCaptureAndroid.class.
static jobject g_context = NULL; // Owned android.content.Context.
namespace webrtc {
// Called by Java to get the global application context.
jobject JNICALL GetContext(JNIEnv* env, jclass) {
assert(g_context);
return g_context;
}
// Called by Java when the camera has a new frame to deliver.
void JNICALL ProvideCameraFrame(
JNIEnv* env,
jobject,
jbyteArray javaCameraFrame,
jint length,
jlong context) {
webrtc::videocapturemodule::VideoCaptureAndroid* captureModule =
reinterpret_cast<webrtc::videocapturemodule::VideoCaptureAndroid*>(
context);
jbyte* cameraFrame = env->GetByteArrayElements(javaCameraFrame, NULL);
captureModule->OnIncomingFrame(
reinterpret_cast<uint8_t*>(cameraFrame), length, 0);
env->ReleaseByteArrayElements(javaCameraFrame, cameraFrame, JNI_ABORT);
}
// Called by Java when the device orientation has changed.
void JNICALL OnOrientationChanged(
JNIEnv* env, jobject, jlong context, jint degrees) {
webrtc::videocapturemodule::VideoCaptureAndroid* captureModule =
reinterpret_cast<webrtc::videocapturemodule::VideoCaptureAndroid*>(
context);
degrees = (360 + degrees) % 360;
assert(degrees >= 0 && degrees < 360);
VideoCaptureRotation rotation =
(degrees <= 45 || degrees > 315) ? kCameraRotate0 :
(degrees > 45 && degrees <= 135) ? kCameraRotate90 :
(degrees > 135 && degrees <= 225) ? kCameraRotate180 :
(degrees > 225 && degrees <= 315) ? kCameraRotate270 :
kCameraRotate0; // Impossible.
int32_t status =
captureModule->VideoCaptureImpl::SetCaptureRotation(rotation);
assert(status == 0);
}
int32_t SetCaptureAndroidVM(JavaVM* javaVM, jobject context) {
if (javaVM) {
assert(!g_jvm);
g_jvm = javaVM;
AttachThreadScoped ats(g_jvm);
g_context = ats.env()->NewGlobalRef(context);
videocapturemodule::DeviceInfoAndroid::Initialize(ats.env());
jclass j_capture_class =
ats.env()->FindClass("org/webrtc/videoengine/VideoCaptureAndroid");
assert(j_capture_class);
g_java_capturer_class =
reinterpret_cast<jclass>(ats.env()->NewGlobalRef(j_capture_class));
assert(g_java_capturer_class);
JNINativeMethod native_methods[] = {
{"GetContext",
"()Landroid/content/Context;",
reinterpret_cast<void*>(&GetContext)},
{"OnOrientationChanged",
"(JI)V",
reinterpret_cast<void*>(&OnOrientationChanged)},
{"ProvideCameraFrame",
"([BIJ)V",
reinterpret_cast<void*>(&ProvideCameraFrame)}};
if (ats.env()->RegisterNatives(g_java_capturer_class,
native_methods, 3) != 0)
assert(false);
} else {
if (g_jvm) {
AttachThreadScoped ats(g_jvm);
ats.env()->UnregisterNatives(g_java_capturer_class);
ats.env()->DeleteGlobalRef(g_java_capturer_class);
g_java_capturer_class = NULL;
ats.env()->DeleteGlobalRef(g_context);
g_context = NULL;
videocapturemodule::DeviceInfoAndroid::DeInitialize();
g_jvm = NULL;
}
}
return 0;
}
namespace videocapturemodule {
VideoCaptureModule* VideoCaptureImpl::Create(
const int32_t id,
const char* deviceUniqueIdUTF8) {
RefCountImpl<videocapturemodule::VideoCaptureAndroid>* implementation =
new RefCountImpl<videocapturemodule::VideoCaptureAndroid>(id);
if (implementation->Init(id, deviceUniqueIdUTF8) != 0) {
delete implementation;
implementation = NULL;
}
return implementation;
}
int32_t VideoCaptureAndroid::OnIncomingFrame(uint8_t* videoFrame,
int32_t videoFrameLength,
int64_t captureTime) {
return IncomingFrame(
videoFrame, videoFrameLength, _captureCapability, captureTime);
}
VideoCaptureAndroid::VideoCaptureAndroid(const int32_t id)
: VideoCaptureImpl(id),
_deviceInfo(id),
_jCapturer(NULL),
_captureStarted(false) {
}
int32_t VideoCaptureAndroid::Init(const int32_t id,
const char* deviceUniqueIdUTF8) {
const int nameLength = strlen(deviceUniqueIdUTF8);
if (nameLength >= kVideoCaptureUniqueNameLength)
return -1;
// Store the device name
_deviceUniqueId = new char[nameLength + 1];
memcpy(_deviceUniqueId, deviceUniqueIdUTF8, nameLength + 1);
AttachThreadScoped ats(g_jvm);
JNIEnv* env = ats.env();
jmethodID ctor = env->GetMethodID(g_java_capturer_class, "<init>", "(IJ)V");
assert(ctor);
jlong j_this = reinterpret_cast<intptr_t>(this);
size_t camera_id = 0;
if (!_deviceInfo.FindCameraIndex(deviceUniqueIdUTF8, &camera_id))
return -1;
_jCapturer = env->NewGlobalRef(
env->NewObject(g_java_capturer_class, ctor, camera_id, j_this));
assert(_jCapturer);
return 0;
}
VideoCaptureAndroid::~VideoCaptureAndroid() {
// Ensure Java camera is released even if our caller didn't explicitly Stop.
if (_captureStarted)
StopCapture();
AttachThreadScoped ats(g_jvm);
ats.env()->DeleteGlobalRef(_jCapturer);
}
int32_t VideoCaptureAndroid::StartCapture(
const VideoCaptureCapability& capability) {
CriticalSectionScoped cs(&_apiCs);
AttachThreadScoped ats(g_jvm);
JNIEnv* env = ats.env();
if (_deviceInfo.GetBestMatchedCapability(
_deviceUniqueId, capability, _captureCapability) < 0) {
WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceVideoCapture, -1,
"%s: GetBestMatchedCapability failed: %dx%d",
__FUNCTION__, capability.width, capability.height);
return -1;
}
_captureDelay = _captureCapability.expectedCaptureDelay;
jmethodID j_start =
env->GetMethodID(g_java_capturer_class, "startCapture", "(IIII)Z");
assert(j_start);
int min_mfps = 0;
int max_mfps = 0;
_deviceInfo.GetMFpsRange(_deviceUniqueId, _captureCapability.maxFPS,
&min_mfps, &max_mfps);
bool started = env->CallBooleanMethod(_jCapturer, j_start,
_captureCapability.width,
_captureCapability.height,
min_mfps, max_mfps);
if (started) {
_requestedCapability = capability;
_captureStarted = true;
}
return started ? 0 : -1;
}
int32_t VideoCaptureAndroid::StopCapture() {
CriticalSectionScoped cs(&_apiCs);
AttachThreadScoped ats(g_jvm);
JNIEnv* env = ats.env();
memset(&_requestedCapability, 0, sizeof(_requestedCapability));
memset(&_captureCapability, 0, sizeof(_captureCapability));
_captureStarted = false;
jmethodID j_stop =
env->GetMethodID(g_java_capturer_class, "stopCapture", "()Z");
return env->CallBooleanMethod(_jCapturer, j_stop) ? 0 : -1;
}
bool VideoCaptureAndroid::CaptureStarted() {
CriticalSectionScoped cs(&_apiCs);
return _captureStarted;
}
int32_t VideoCaptureAndroid::CaptureSettings(
VideoCaptureCapability& settings) {
CriticalSectionScoped cs(&_apiCs);
settings = _requestedCapability;
return 0;
}
int32_t VideoCaptureAndroid::SetCaptureRotation(
VideoCaptureRotation rotation) {
CriticalSectionScoped cs(&_apiCs);
int32_t status = VideoCaptureImpl::SetCaptureRotation(rotation);
if (status != 0)
return status;
AttachThreadScoped ats(g_jvm);
JNIEnv* env = ats.env();
jmethodID j_spr =
env->GetMethodID(g_java_capturer_class, "setPreviewRotation", "(I)V");
assert(j_spr);
int rotation_degrees;
if (RotationInDegrees(rotation, &rotation_degrees) != 0) {
assert(false);
}
env->CallVoidMethod(_jCapturer, j_spr, rotation_degrees);
return 0;
}
} // namespace videocapturemodule
} // namespace webrtc
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