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| 1 /* | |
| 2 * Copyright (c) 2010 The WebRTC project authors. All Rights Reserved. | |
| 3 * | |
| 4 * Use of this source code is governed by a BSD-style license | |
| 5 * that can be found in the LICENSE file in the root of the source | |
| 6 * tree. An additional intellectual property rights grant can be found | |
| 7 * in the file PATENTS. All contributing project authors may | |
| 8 * be found in the AUTHORS file in the root of the source tree. | |
| 9 */ | |
| 10 | |
| 11 // Generates YUV420 frames with a "landscape with striped crosshair" in the | |
| 12 // Y-plane, plus a horizontal gradient in the U-plane and a vertical one in the | |
| 13 // V-plane. This makes for a nice mix of colours that is suited for both | |
| 14 // catching visual errors and making sure e.g. YUV->RGB/BGR conversion looks | |
| 15 // the same on different platforms. | |
| 16 // There is also a solid box bouncing around in the Y-plane, and two differently | |
| 17 // coloured lines bouncing horizontally and vertically in the U and V plane. | |
| 18 // This helps illustrating how the frame boundary goes, and can aid as a quite | |
| 19 // handy visual help for noticing e.g. packet loss if the frames are encoded | |
| 20 // and sent over the network. | |
| 21 | |
| 22 #ifndef WEBRTC_MEDIA_BASE_YUVFRAMEGENERATOR_H_ | |
| 23 #define WEBRTC_MEDIA_BASE_YUVFRAMEGENERATOR_H_ | |
| 24 | |
| 25 #include "webrtc/base/basictypes.h" | |
| 26 #include "webrtc/base/constructormagic.h" | |
| 27 | |
| 28 namespace cricket { | |
| 29 | |
| 30 class YuvFrameGenerator { | |
| 31 public: | |
| 32 // Constructs a frame-generator that produces frames of size |width|x|height|. | |
| 33 // If |enable_barcode| is specified, barcodes can be included in the frames | |
| 34 // when calling |GenerateNextFrame(uint8_t*, uint32_t)|. If |enable_barcode| | |
| 35 // is |true| then |width|x|height| should be at least 160x100; otherwise this | |
| 36 // constructor will abort. | |
| 37 YuvFrameGenerator(int width, int height, bool enable_barcode); | |
| 38 ~YuvFrameGenerator(); | |
| 39 | |
| 40 int GetFrameSize() { return frame_data_size_; } | |
| 41 | |
| 42 // Generate the next frame and return it in the provided |frame_buffer|. If | |
| 43 // barcode_value is not |nullptr| the value referred by it will be encoded | |
| 44 // into a barcode in the frame. The value should in the range: | |
| 45 // [0..9,999,999]. If the value exceeds this range or barcodes were not | |
| 46 // requested in the constructor, this function will abort. | |
| 47 void GenerateNextFrame(uint8_t* frame_buffer, int32_t barcode_value); | |
| 48 | |
| 49 int GetHeight() { return height_; } | |
| 50 int GetWidth() { return width_; } | |
| 51 | |
| 52 // Fetch the bounds of the barcode from the generator. The barcode will | |
| 53 // always be at this location. This function will abort if barcodes were not | |
| 54 // requested in the constructor. | |
| 55 void GetBarcodeBounds(int* top, int* left, int* width, int* height); | |
| 56 | |
| 57 private: | |
| 58 void DrawLandscape(uint8_t* p, int w, int h); | |
| 59 void DrawGradientX(uint8_t* p, int w, int h); | |
| 60 void DrawGradientY(uint8_t* p, int w, int h); | |
| 61 void DrawMovingLineX(uint8_t* p, int w, int h, int n); | |
| 62 void DrawMovingLineY(uint8_t* p, int w, int h, int n); | |
| 63 void DrawBouncingCube(uint8_t* p, int w, int h, int n); | |
| 64 | |
| 65 void DrawBarcode(uint32_t value); | |
| 66 int DrawSideGuardBars(int x, int y, int height); | |
| 67 int DrawMiddleGuardBars(int x, int y, int height); | |
| 68 int DrawEanEncodedDigit(int digit, int x, int y, int height, bool r_code); | |
| 69 void DrawBlockRectangle(uint8_t* p, | |
| 70 int x_start, | |
| 71 int y_start, | |
| 72 int width, | |
| 73 int height, | |
| 74 int pitch, | |
| 75 uint8_t value); | |
| 76 | |
| 77 private: | |
| 78 int width_; | |
| 79 int height_; | |
| 80 int frame_index_; | |
| 81 int frame_data_size_; | |
| 82 uint8_t* y_data_; | |
| 83 uint8_t* u_data_; | |
| 84 uint8_t* v_data_; | |
| 85 | |
| 86 int barcode_start_x_; | |
| 87 int barcode_start_y_; | |
| 88 | |
| 89 RTC_DISALLOW_COPY_AND_ASSIGN(YuvFrameGenerator); | |
| 90 }; | |
| 91 | |
| 92 } // namespace cricket | |
| 93 | |
| 94 #endif // WEBRTC_MEDIA_BASE_YUVFRAMEGENERATOR_H_ | |
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