/*
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* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "webrtc/modules/video_processing/spatial_resampler.h"
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namespace webrtc {
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VPMSimpleSpatialResampler::VPMSimpleSpatialResampler()
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: resampling_mode_(kFastRescaling),
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target_width_(0),
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target_height_(0),
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scaler_() {}
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VPMSimpleSpatialResampler::~VPMSimpleSpatialResampler() {}
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int32_t VPMSimpleSpatialResampler::SetTargetFrameSize(int32_t width,
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int32_t height) {
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if (resampling_mode_ == kNoRescaling)
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return VPM_OK;
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if (width < 1 || height < 1)
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return VPM_PARAMETER_ERROR;
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target_width_ = width;
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target_height_ = height;
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return VPM_OK;
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}
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void VPMSimpleSpatialResampler::SetInputFrameResampleMode(
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VideoFrameResampling resampling_mode) {
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resampling_mode_ = resampling_mode;
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}
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void VPMSimpleSpatialResampler::Reset() {
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resampling_mode_ = kFastRescaling;
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target_width_ = 0;
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target_height_ = 0;
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}
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int32_t VPMSimpleSpatialResampler::ResampleFrame(const VideoFrame& inFrame,
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VideoFrame* outFrame) {
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// Don't copy if frame remains as is.
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if (resampling_mode_ == kNoRescaling) {
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return VPM_OK;
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// Check if re-sampling is needed
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} else if ((inFrame.width() == target_width_) &&
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(inFrame.height() == target_height_)) {
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return VPM_OK;
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}
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// Setting scaler
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// TODO(mikhal/marpan): Should we allow for setting the filter mode in
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// _scale.Set() with |resampling_mode_|?
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int ret_val = 0;
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ret_val = scaler_.Set(inFrame.width(), inFrame.height(), target_width_,
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target_height_, kI420, kI420, kScaleBox);
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if (ret_val < 0)
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return ret_val;
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ret_val = scaler_.Scale(inFrame, outFrame);
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// Setting time parameters to the output frame.
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// Timestamp will be reset in Scale call above, so we should set it after.
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outFrame->set_timestamp(inFrame.timestamp());
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outFrame->set_render_time_ms(inFrame.render_time_ms());
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if (ret_val == 0)
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return VPM_OK;
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else
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return VPM_SCALE_ERROR;
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}
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int32_t VPMSimpleSpatialResampler::TargetHeight() {
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return target_height_;
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}
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int32_t VPMSimpleSpatialResampler::TargetWidth() {
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return target_width_;
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}
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bool VPMSimpleSpatialResampler::ApplyResample(int32_t width, int32_t height) {
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if ((width == target_width_ && height == target_height_) ||
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resampling_mode_ == kNoRescaling)
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return false;
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else
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return true;
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}
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} // namespace webrtc
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