blob: 4d67010108157e35d968101265640bdf8011193c [file] [log] [blame]
/*
* 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 "modules/video_capture/video_capture_impl.h"
#include <stdlib.h>
#include "api/video/i420_buffer.h"
#include "common_video/libyuv/include/webrtc_libyuv.h"
#include "modules/include/module_common_types.h"
#include "modules/video_capture/video_capture_config.h"
#include "rtc_base/logging.h"
#include "rtc_base/refcount.h"
#include "rtc_base/timeutils.h"
#include "rtc_base/trace_event.h"
#include "system_wrappers/include/clock.h"
namespace webrtc {
namespace videocapturemodule {
rtc::scoped_refptr<VideoCaptureModule> VideoCaptureImpl::Create(
VideoCaptureExternal*& externalCapture) {
rtc::scoped_refptr<VideoCaptureImpl> implementation(
new rtc::RefCountedObject<VideoCaptureImpl>());
externalCapture = implementation.get();
return implementation;
}
const char* VideoCaptureImpl::CurrentDeviceName() const {
return _deviceUniqueId;
}
// static
int32_t VideoCaptureImpl::RotationFromDegrees(int degrees,
VideoRotation* rotation) {
switch (degrees) {
case 0:
*rotation = kVideoRotation_0;
return 0;
case 90:
*rotation = kVideoRotation_90;
return 0;
case 180:
*rotation = kVideoRotation_180;
return 0;
case 270:
*rotation = kVideoRotation_270;
return 0;
default:
return -1;;
}
}
// static
int32_t VideoCaptureImpl::RotationInDegrees(VideoRotation rotation,
int* degrees) {
switch (rotation) {
case kVideoRotation_0:
*degrees = 0;
return 0;
case kVideoRotation_90:
*degrees = 90;
return 0;
case kVideoRotation_180:
*degrees = 180;
return 0;
case kVideoRotation_270:
*degrees = 270;
return 0;
}
return -1;
}
VideoCaptureImpl::VideoCaptureImpl()
: _deviceUniqueId(NULL),
_requestedCapability(),
_lastProcessTimeNanos(rtc::TimeNanos()),
_lastFrameRateCallbackTimeNanos(rtc::TimeNanos()),
_dataCallBack(NULL),
_lastProcessFrameTimeNanos(rtc::TimeNanos()),
_rotateFrame(kVideoRotation_0),
apply_rotation_(false) {
_requestedCapability.width = kDefaultWidth;
_requestedCapability.height = kDefaultHeight;
_requestedCapability.maxFPS = 30;
_requestedCapability.videoType = VideoType::kI420;
memset(_incomingFrameTimesNanos, 0, sizeof(_incomingFrameTimesNanos));
}
VideoCaptureImpl::~VideoCaptureImpl()
{
DeRegisterCaptureDataCallback();
if (_deviceUniqueId)
delete[] _deviceUniqueId;
}
void VideoCaptureImpl::RegisterCaptureDataCallback(
rtc::VideoSinkInterface<VideoFrame>* dataCallBack) {
rtc::CritScope cs(&_apiCs);
_dataCallBack = dataCallBack;
}
void VideoCaptureImpl::DeRegisterCaptureDataCallback() {
rtc::CritScope cs(&_apiCs);
_dataCallBack = NULL;
}
int32_t VideoCaptureImpl::DeliverCapturedFrame(VideoFrame& captureFrame) {
UpdateFrameCount(); // frame count used for local frame rate callback.
if (_dataCallBack) {
_dataCallBack->OnFrame(captureFrame);
}
return 0;
}
int32_t VideoCaptureImpl::IncomingFrame(
uint8_t* videoFrame,
size_t videoFrameLength,
const VideoCaptureCapability& frameInfo,
int64_t captureTime/*=0*/)
{
rtc::CritScope cs(&_apiCs);
const int32_t width = frameInfo.width;
const int32_t height = frameInfo.height;
TRACE_EVENT1("webrtc", "VC::IncomingFrame", "capture_time", captureTime);
// Not encoded, convert to I420.
if (frameInfo.videoType != VideoType::kMJPEG &&
CalcBufferSize(frameInfo.videoType, width, abs(height)) !=
videoFrameLength) {
LOG(LS_ERROR) << "Wrong incoming frame length.";
return -1;
}
int stride_y = width;
int stride_uv = (width + 1) / 2;
int target_width = width;
int target_height = height;
// SetApplyRotation doesn't take any lock. Make a local copy here.
bool apply_rotation = apply_rotation_;
if (apply_rotation) {
// Rotating resolution when for 90/270 degree rotations.
if (_rotateFrame == kVideoRotation_90 ||
_rotateFrame == kVideoRotation_270) {
target_width = abs(height);
target_height = width;
}
}
// Setting absolute height (in case it was negative).
// In Windows, the image starts bottom left, instead of top left.
// Setting a negative source height, inverts the image (within LibYuv).
// TODO(nisse): Use a pool?
rtc::scoped_refptr<I420Buffer> buffer = I420Buffer::Create(
target_width, abs(target_height), stride_y, stride_uv, stride_uv);
const int conversionResult = ConvertToI420(
frameInfo.videoType, videoFrame, 0, 0, // No cropping
width, height, videoFrameLength,
apply_rotation ? _rotateFrame : kVideoRotation_0, buffer.get());
if (conversionResult < 0) {
LOG(LS_ERROR) << "Failed to convert capture frame from type "
<< static_cast<int>(frameInfo.videoType) << "to I420.";
return -1;
}
VideoFrame captureFrame(buffer, 0, rtc::TimeMillis(),
!apply_rotation ? _rotateFrame : kVideoRotation_0);
captureFrame.set_ntp_time_ms(captureTime);
DeliverCapturedFrame(captureFrame);
return 0;
}
int32_t VideoCaptureImpl::SetCaptureRotation(VideoRotation rotation) {
rtc::CritScope cs(&_apiCs);
_rotateFrame = rotation;
return 0;
}
bool VideoCaptureImpl::SetApplyRotation(bool enable) {
// We can't take any lock here as it'll cause deadlock with IncomingFrame.
// The effect of this is the last caller wins.
apply_rotation_ = enable;
return true;
}
void VideoCaptureImpl::UpdateFrameCount() {
if (_incomingFrameTimesNanos[0] / rtc::kNumNanosecsPerMicrosec == 0) {
// first no shift
} else {
// shift
for (int i = (kFrameRateCountHistorySize - 2); i >= 0; --i) {
_incomingFrameTimesNanos[i + 1] = _incomingFrameTimesNanos[i];
}
}
_incomingFrameTimesNanos[0] = rtc::TimeNanos();
}
uint32_t VideoCaptureImpl::CalculateFrameRate(int64_t now_ns) {
int32_t num = 0;
int32_t nrOfFrames = 0;
for (num = 1; num < (kFrameRateCountHistorySize - 1); ++num) {
if (_incomingFrameTimesNanos[num] <= 0 ||
(now_ns - _incomingFrameTimesNanos[num]) /
rtc::kNumNanosecsPerMillisec >
kFrameRateHistoryWindowMs) { // don't use data older than 2sec
break;
} else {
nrOfFrames++;
}
}
if (num > 1) {
int64_t diff = (now_ns - _incomingFrameTimesNanos[num - 1]) /
rtc::kNumNanosecsPerMillisec;
if (diff > 0) {
return uint32_t((nrOfFrames * 1000.0f / diff) + 0.5f);
}
}
return nrOfFrames;
}
} // namespace videocapturemodule
} // namespace webrtc