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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_processing/video_processing_impl.h"
#include <assert.h>
#include "webrtc/base/checks.h"
#include "webrtc/base/logging.h"
#include "webrtc/system_wrappers/include/critical_section_wrapper.h"
namespace webrtc {
namespace {
int GetSubSamplingFactor(int width, int height) {
if (width * height >= 640 * 480) {
return 3;
} else if (width * height >= 352 * 288) {
return 2;
} else if (width * height >= 176 * 144) {
return 1;
} else {
return 0;
}
}
} // namespace
VideoProcessing* VideoProcessing::Create() {
return new VideoProcessingImpl();
}
VideoProcessingImpl::VideoProcessingImpl() {}
VideoProcessingImpl::~VideoProcessingImpl() {}
void VideoProcessing::GetFrameStats(const VideoFrame& frame,
FrameStats* stats) {
ClearFrameStats(stats); // The histogram needs to be zeroed out.
if (frame.IsZeroSize()) {
return;
}
int width = frame.width();
int height = frame.height();
stats->sub_sampling_factor = GetSubSamplingFactor(width, height);
const uint8_t* buffer = frame.buffer(kYPlane);
// Compute histogram and sum of frame
for (int i = 0; i < height; i += (1 << stats->sub_sampling_factor)) {
int k = i * width;
for (int j = 0; j < width; j += (1 << stats->sub_sampling_factor)) {
stats->hist[buffer[k + j]]++;
stats->sum += buffer[k + j];
}
}
stats->num_pixels = (width * height) / ((1 << stats->sub_sampling_factor) *
(1 << stats->sub_sampling_factor));
assert(stats->num_pixels > 0);
// Compute mean value of frame
stats->mean = stats->sum / stats->num_pixels;
}
bool VideoProcessing::ValidFrameStats(const FrameStats& stats) {
if (stats.num_pixels == 0) {
LOG(LS_WARNING) << "Invalid frame stats.";
return false;
}
return true;
}
void VideoProcessing::ClearFrameStats(FrameStats* stats) {
stats->mean = 0;
stats->sum = 0;
stats->num_pixels = 0;
stats->sub_sampling_factor = 0;
memset(stats->hist, 0, sizeof(stats->hist));
}
void VideoProcessing::Brighten(int delta, VideoFrame* frame) {
RTC_DCHECK(!frame->IsZeroSize());
RTC_DCHECK(frame->width() > 0);
RTC_DCHECK(frame->height() > 0);
int num_pixels = frame->width() * frame->height();
int look_up[256];
for (int i = 0; i < 256; i++) {
int val = i + delta;
look_up[i] = ((((val < 0) ? 0 : val) > 255) ? 255 : val);
}
uint8_t* temp_ptr = frame->buffer(kYPlane);
for (int i = 0; i < num_pixels; i++) {
*temp_ptr = static_cast<uint8_t>(look_up[*temp_ptr]);
temp_ptr++;
}
}
int32_t VideoProcessingImpl::Deflickering(VideoFrame* frame,
FrameStats* stats) {
rtc::CritScope mutex(&mutex_);
return deflickering_.ProcessFrame(frame, stats);
}
int32_t VideoProcessingImpl::BrightnessDetection(const VideoFrame& frame,
const FrameStats& stats) {
rtc::CritScope mutex(&mutex_);
return brightness_detection_.ProcessFrame(frame, stats);
}
void VideoProcessingImpl::EnableTemporalDecimation(bool enable) {
rtc::CritScope mutex(&mutex_);
frame_pre_processor_.EnableTemporalDecimation(enable);
}
void VideoProcessingImpl::SetInputFrameResampleMode(
VideoFrameResampling resampling_mode) {
rtc::CritScope cs(&mutex_);
frame_pre_processor_.SetInputFrameResampleMode(resampling_mode);
}
int32_t VideoProcessingImpl::SetTargetResolution(uint32_t width,
uint32_t height,
uint32_t frame_rate) {
rtc::CritScope cs(&mutex_);
return frame_pre_processor_.SetTargetResolution(width, height, frame_rate);
}
void VideoProcessingImpl::SetTargetFramerate(int frame_rate) {
rtc::CritScope cs(&mutex_);
frame_pre_processor_.SetTargetFramerate(frame_rate);
}
uint32_t VideoProcessingImpl::GetDecimatedFrameRate() {
rtc::CritScope cs(&mutex_);
return frame_pre_processor_.GetDecimatedFrameRate();
}
uint32_t VideoProcessingImpl::GetDecimatedWidth() const {
rtc::CritScope cs(&mutex_);
return frame_pre_processor_.GetDecimatedWidth();
}
uint32_t VideoProcessingImpl::GetDecimatedHeight() const {
rtc::CritScope cs(&mutex_);
return frame_pre_processor_.GetDecimatedHeight();
}
void VideoProcessingImpl::EnableDenosing(bool enable) {
rtc::CritScope cs(&mutex_);
frame_pre_processor_.EnableDenosing(enable);
}
const VideoFrame* VideoProcessingImpl::PreprocessFrame(
const VideoFrame& frame) {
rtc::CritScope mutex(&mutex_);
return frame_pre_processor_.PreprocessFrame(frame);
}
VideoContentMetrics* VideoProcessingImpl::GetContentMetrics() const {
rtc::CritScope mutex(&mutex_);
return frame_pre_processor_.GetContentMetrics();
}
void VideoProcessingImpl::EnableContentAnalysis(bool enable) {
rtc::CritScope mutex(&mutex_);
frame_pre_processor_.EnableContentAnalysis(enable);
}
} // namespace webrtc
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