1 /*
2 * libjingle
3 * Copyright 2014 Google Inc.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice,
9 * this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright notice,
11 * this list of conditions and the following disclaimer in the documentation
12 * and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #include "talk/media/base/videoframefactory.h"
29
30 #include <algorithm>
31 #include "talk/media/base/videocapturer.h"
32
33 namespace cricket {
34
CreateAliasedFrame(const CapturedFrame * input_frame,int cropped_input_width,int cropped_input_height,int output_width,int output_height) const35 VideoFrame* VideoFrameFactory::CreateAliasedFrame(
36 const CapturedFrame* input_frame,
37 int cropped_input_width,
38 int cropped_input_height,
39 int output_width,
40 int output_height) const {
41 rtc::scoped_ptr<VideoFrame> cropped_input_frame(CreateAliasedFrame(
42 input_frame, cropped_input_width, cropped_input_height));
43 if (!cropped_input_frame)
44 return nullptr;
45
46 if (cropped_input_width == output_width &&
47 cropped_input_height == output_height) {
48 // No scaling needed.
49 return cropped_input_frame.release();
50 }
51
52 // If the frame is rotated, we need to switch the width and height.
53 if (apply_rotation_ &&
54 (input_frame->rotation == webrtc::kVideoRotation_90 ||
55 input_frame->rotation == webrtc::kVideoRotation_270)) {
56 std::swap(output_width, output_height);
57 }
58
59 // Create and stretch the output frame if it has not been created yet, is
60 // still in use by others, or its size is not same as the expected.
61 if (!output_frame_ || !output_frame_->IsExclusive() ||
62 output_frame_->GetWidth() != static_cast<size_t>(output_width) ||
63 output_frame_->GetHeight() != static_cast<size_t>(output_height)) {
64 output_frame_.reset(
65 cropped_input_frame->Stretch(output_width, output_height, true, true));
66 if (!output_frame_) {
67 LOG(LS_WARNING) << "Failed to stretch frame to " << output_width << "x"
68 << output_height;
69 return NULL;
70 }
71 } else {
72 cropped_input_frame->StretchToFrame(output_frame_.get(), true, true);
73 output_frame_->SetTimeStamp(cropped_input_frame->GetTimeStamp());
74 }
75 return output_frame_->Copy();
76 }
77
78 } // namespace cricket
79