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/*
* libjingle
* Copyright 2010 Google Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// Generates YUV420 frames with a "landscape with striped crosshair" in the
// Y-plane, plus a horizontal gradient in the U-plane and a vertical one in the
// V-plane. This makes for a nice mix of colours that is suited for both
// catching visual errors and making sure e.g. YUV->RGB/BGR conversion looks
// the same on different platforms.
// There is also a solid box bouncing around in the Y-plane, and two differently
// coloured lines bouncing horizontally and vertically in the U and V plane.
// This helps illustrating how the frame boundary goes, and can aid as a quite
// handy visual help for noticing e.g. packet loss if the frames are encoded
// and sent over the network.
#ifndef TALK_MEDIA_BASE_YUVFRAMEGENERATOR_H_
#define TALK_MEDIA_BASE_YUVFRAMEGENERATOR_H_
#include "webrtc/base/basictypes.h"
#include "webrtc/base/constructormagic.h"
namespace cricket {
class YuvFrameGenerator {
public:
// Constructs a frame-generator that produces frames of size |width|x|height|.
// If |enable_barcode| is specified, barcodes can be included in the frames
// when calling |GenerateNextFrame(uint8_t*, uint32_t)|. If |enable_barcode|
// is |true| then |width|x|height| should be at least 160x100; otherwise this
// constructor will abort.
YuvFrameGenerator(int width, int height, bool enable_barcode);
~YuvFrameGenerator();
int GetFrameSize() { return frame_data_size_; }
// Generate the next frame and return it in the provided |frame_buffer|. If
// barcode_value is not |nullptr| the value referred by it will be encoded
// into a barcode in the frame. The value should in the range:
// [0..9,999,999]. If the value exceeds this range or barcodes were not
// requested in the constructor, this function will abort.
void GenerateNextFrame(uint8_t* frame_buffer, int32_t barcode_value);
int GetHeight() { return height_; }
int GetWidth() { return width_; }
// Fetch the bounds of the barcode from the generator. The barcode will
// always be at this location. This function will abort if barcodes were not
// requested in the constructor.
void GetBarcodeBounds(int* top, int* left, int* width, int* height);
private:
void DrawLandscape(uint8_t* p, int w, int h);
void DrawGradientX(uint8_t* p, int w, int h);
void DrawGradientY(uint8_t* p, int w, int h);
void DrawMovingLineX(uint8_t* p, int w, int h, int n);
void DrawMovingLineY(uint8_t* p, int w, int h, int n);
void DrawBouncingCube(uint8_t* p, int w, int h, int n);
void DrawBarcode(uint32_t value);
int DrawSideGuardBars(int x, int y, int height);
int DrawMiddleGuardBars(int x, int y, int height);
int DrawEanEncodedDigit(int digit, int x, int y, int height, bool r_code);
void DrawBlockRectangle(uint8_t* p,
int x_start,
int y_start,
int width,
int height,
int pitch,
uint8_t value);
private:
int width_;
int height_;
int frame_index_;
int frame_data_size_;
uint8_t* y_data_;
uint8_t* u_data_;
uint8_t* v_data_;
int barcode_start_x_;
int barcode_start_y_;
RTC_DISALLOW_COPY_AND_ASSIGN(YuvFrameGenerator);
};
} // namespace cricket
#endif // TALK_MEDIA_BASE_YUVFRAMEGENERATOR_H_
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