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1 /* | |
2 * libjingle | |
3 * Copyright 2010 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 // Generates YUV420 frames with a "landscape with striped crosshair" in the | |
29 // Y-plane, plus a horizontal gradient in the U-plane and a vertical one in the | |
30 // V-plane. This makes for a nice mix of colours that is suited for both | |
31 // catching visual errors and making sure e.g. YUV->RGB/BGR conversion looks | |
32 // the same on different platforms. | |
33 // There is also a solid box bouncing around in the Y-plane, and two differently | |
34 // coloured lines bouncing horizontally and vertically in the U and V plane. | |
35 // This helps illustrating how the frame boundary goes, and can aid as a quite | |
36 // handy visual help for noticing e.g. packet loss if the frames are encoded | |
37 // and sent over the network. | |
38 | |
39 #ifndef TALK_MEDIA_BASE_YUVFRAMEGENERATOR_H_ | |
40 #define TALK_MEDIA_BASE_YUVFRAMEGENERATOR_H_ | |
41 | |
42 #include "webrtc/base/basictypes.h" | |
43 #include "webrtc/base/constructormagic.h" | |
44 | |
45 namespace cricket { | |
46 | |
47 class YuvFrameGenerator { | |
48 public: | |
49 // Constructs a frame-generator that produces frames of size |width|x|height|. | |
50 // If |enable_barcode| is specified, barcodes can be included in the frames | |
51 // when calling |GenerateNextFrame(uint8_t*, uint32_t)|. If |enable_barcode| | |
52 // is |true| then |width|x|height| should be at least 160x100; otherwise this | |
53 // constructor will abort. | |
54 YuvFrameGenerator(int width, int height, bool enable_barcode); | |
55 ~YuvFrameGenerator(); | |
56 | |
57 int GetFrameSize() { return frame_data_size_; } | |
58 | |
59 // Generate the next frame and return it in the provided |frame_buffer|. If | |
60 // barcode_value is not |nullptr| the value referred by it will be encoded | |
61 // into a barcode in the frame. The value should in the range: | |
62 // [0..9,999,999]. If the value exceeds this range or barcodes were not | |
63 // requested in the constructor, this function will abort. | |
64 void GenerateNextFrame(uint8_t* frame_buffer, int32_t barcode_value); | |
65 | |
66 int GetHeight() { return height_; } | |
67 int GetWidth() { return width_; } | |
68 | |
69 // Fetch the bounds of the barcode from the generator. The barcode will | |
70 // always be at this location. This function will abort if barcodes were not | |
71 // requested in the constructor. | |
72 void GetBarcodeBounds(int* top, int* left, int* width, int* height); | |
73 | |
74 private: | |
75 void DrawLandscape(uint8_t* p, int w, int h); | |
76 void DrawGradientX(uint8_t* p, int w, int h); | |
77 void DrawGradientY(uint8_t* p, int w, int h); | |
78 void DrawMovingLineX(uint8_t* p, int w, int h, int n); | |
79 void DrawMovingLineY(uint8_t* p, int w, int h, int n); | |
80 void DrawBouncingCube(uint8_t* p, int w, int h, int n); | |
81 | |
82 void DrawBarcode(uint32_t value); | |
83 int DrawSideGuardBars(int x, int y, int height); | |
84 int DrawMiddleGuardBars(int x, int y, int height); | |
85 int DrawEanEncodedDigit(int digit, int x, int y, int height, bool r_code); | |
86 void DrawBlockRectangle(uint8_t* p, | |
87 int x_start, | |
88 int y_start, | |
89 int width, | |
90 int height, | |
91 int pitch, | |
92 uint8_t value); | |
93 | |
94 private: | |
95 int width_; | |
96 int height_; | |
97 int frame_index_; | |
98 int frame_data_size_; | |
99 uint8_t* y_data_; | |
100 uint8_t* u_data_; | |
101 uint8_t* v_data_; | |
102 | |
103 int barcode_start_x_; | |
104 int barcode_start_y_; | |
105 | |
106 RTC_DISALLOW_COPY_AND_ASSIGN(YuvFrameGenerator); | |
107 }; | |
108 | |
109 } // namespace cricket | |
110 | |
111 #endif // TALK_MEDIA_BASE_YUVFRAMEGENERATOR_H_ | |
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