5b3c443d30
Reason for revert: Breaks chrome FYI bots. Original issue's description: > Delete webrtc::VideoFrame methods buffer and stride. > > To make the HasOneRef/IsMutable hack work, also had to change the > video_frame_buffer method to return a const ref to a scoped_ref_ptr, > to not imply an AddRef. > > BUG=webrtc:5682 TBR=perkj@webrtc.org,magjed@webrtc.org,pbos@webrtc.org,pthatcher@webrtc.org,stefan@webrtc.org # Skipping CQ checks because original CL landed less than 1 days ago. NOPRESUBMIT=true NOTREECHECKS=true NOTRY=true BUG=webrtc:5682 Review-Url: https://codereview.webrtc.org/1935443002 Cr-Commit-Position: refs/heads/master@{#12558}
112 lines
3.8 KiB
C++
112 lines
3.8 KiB
C++
/*
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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/common_video/libyuv/include/scaler.h"
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#include <algorithm>
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// NOTE(ajm): Path provided by gyp.
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#include "libyuv.h" // NOLINT
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namespace webrtc {
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Scaler::Scaler()
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: method_(kScaleBox),
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src_width_(0),
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src_height_(0),
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dst_width_(0),
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dst_height_(0),
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set_(false) {}
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Scaler::~Scaler() {}
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int Scaler::Set(int src_width, int src_height,
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int dst_width, int dst_height,
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VideoType src_video_type, VideoType dst_video_type,
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ScaleMethod method) {
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set_ = false;
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if (src_width < 1 || src_height < 1 || dst_width < 1 || dst_height < 1)
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return -1;
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if (!SupportedVideoType(src_video_type, dst_video_type))
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return -1;
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src_width_ = src_width;
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src_height_ = src_height;
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dst_width_ = dst_width;
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dst_height_ = dst_height;
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method_ = method;
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set_ = true;
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return 0;
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}
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int Scaler::Scale(const VideoFrame& src_frame, VideoFrame* dst_frame) {
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assert(dst_frame);
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if (src_frame.IsZeroSize())
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return -1;
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if (!set_)
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return -2;
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// Making sure that destination frame is of sufficient size.
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dst_frame->set_video_frame_buffer(
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buffer_pool_.CreateBuffer(dst_width_, dst_height_));
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// We want to preserve aspect ratio instead of stretching the frame.
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// Therefore, we need to crop the source frame. Calculate the largest center
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// aligned region of the source frame that can be used.
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const int cropped_src_width =
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std::min(src_width_, dst_width_ * src_height_ / dst_height_);
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const int cropped_src_height =
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std::min(src_height_, dst_height_ * src_width_ / dst_width_);
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// Make sure the offsets are even to avoid rounding errors for the U/V planes.
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const int src_offset_x = ((src_width_ - cropped_src_width) / 2) & ~1;
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const int src_offset_y = ((src_height_ - cropped_src_height) / 2) & ~1;
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const uint8_t* y_ptr = src_frame.buffer(kYPlane) +
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src_offset_y * src_frame.stride(kYPlane) +
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src_offset_x;
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const uint8_t* u_ptr = src_frame.buffer(kUPlane) +
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src_offset_y / 2 * src_frame.stride(kUPlane) +
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src_offset_x / 2;
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const uint8_t* v_ptr = src_frame.buffer(kVPlane) +
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src_offset_y / 2 * src_frame.stride(kVPlane) +
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src_offset_x / 2;
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return libyuv::I420Scale(y_ptr,
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src_frame.stride(kYPlane),
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u_ptr,
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src_frame.stride(kUPlane),
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v_ptr,
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src_frame.stride(kVPlane),
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cropped_src_width, cropped_src_height,
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dst_frame->buffer(kYPlane),
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dst_frame->stride(kYPlane),
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dst_frame->buffer(kUPlane),
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dst_frame->stride(kUPlane),
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dst_frame->buffer(kVPlane),
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dst_frame->stride(kVPlane),
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dst_width_, dst_height_,
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libyuv::FilterMode(method_));
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}
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bool Scaler::SupportedVideoType(VideoType src_video_type,
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VideoType dst_video_type) {
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if (src_video_type != dst_video_type)
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return false;
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if ((src_video_type == kI420) || (src_video_type == kIYUV) ||
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(src_video_type == kYV12))
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return true;
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return false;
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}
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} // namespace webrtc
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