Chromium Code Reviews
chromiumcodereview-hr@appspot.gserviceaccount.com (chromiumcodereview-hr) | Please choose your nickname with Settings | Help | Chromium Project | Gerrit Changes | Sign out
(107)

Side by Side Diff: webrtc/sdk/objc/Framework/Classes/Video/RTCI420Shader.mm

Issue 2890513002: Revert of Split iOS sdk in to separate targets (Closed)
Patch Set: Created 3 years, 7 months ago
Use n/p to move between diff chunks; N/P to move between comments. Draft comments are only viewable by you.
Jump to:
View unified diff | Download patch
OLDNEW
(Empty)
1 /*
2 * Copyright 2016 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 #import "RTCShader.h"
12
13 #import "RTCI420TextureCache.h"
14 #import "RTCShader+Private.h"
15 #import "WebRTC/RTCLogging.h"
16 #import "WebRTC/RTCVideoFrame.h"
17
18 #include "webrtc/base/optional.h"
19
20 // Fragment shader converts YUV values from input textures into a final RGB
21 // pixel. The conversion formula is from http://www.fourcc.org/fccyvrgb.php.
22 static const char kI420FragmentShaderSource[] =
23 SHADER_VERSION
24 "precision highp float;"
25 FRAGMENT_SHADER_IN " vec2 v_texcoord;\n"
26 "uniform lowp sampler2D s_textureY;\n"
27 "uniform lowp sampler2D s_textureU;\n"
28 "uniform lowp sampler2D s_textureV;\n"
29 FRAGMENT_SHADER_OUT
30 "void main() {\n"
31 " float y, u, v, r, g, b;\n"
32 " y = " FRAGMENT_SHADER_TEXTURE "(s_textureY, v_texcoord).r;\n"
33 " u = " FRAGMENT_SHADER_TEXTURE "(s_textureU, v_texcoord).r;\n"
34 " v = " FRAGMENT_SHADER_TEXTURE "(s_textureV, v_texcoord).r;\n"
35 " u = u - 0.5;\n"
36 " v = v - 0.5;\n"
37 " r = y + 1.403 * v;\n"
38 " g = y - 0.344 * u - 0.714 * v;\n"
39 " b = y + 1.770 * u;\n"
40 " " FRAGMENT_SHADER_COLOR " = vec4(r, g, b, 1.0);\n"
41 " }\n";
42
43 @implementation RTCI420Shader {
44 RTCI420TextureCache* textureCache;
45 // Handles for OpenGL constructs.
46 GLuint _i420Program;
47 GLuint _vertexArray;
48 GLuint _vertexBuffer;
49 GLint _ySampler;
50 GLint _uSampler;
51 GLint _vSampler;
52 // Store current rotation and only upload new vertex data when rotation
53 // changes.
54 rtc::Optional<RTCVideoRotation> _currentRotation;
55 }
56
57 - (instancetype)initWithContext:(GlContextType *)context {
58 if (self = [super init]) {
59 textureCache = [[RTCI420TextureCache alloc] initWithContext:context];
60 glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
61 if (![self setupI420Program] ||
62 !RTCSetupVerticesForProgram(_i420Program, &_vertexBuffer, &_vertexArray) ) {
63 RTCLog(@"Failed to initialize RTCI420Shader.");
64 self = nil;
65 }
66 }
67 return self;
68 }
69
70 - (void)dealloc {
71 glDeleteProgram(_i420Program);
72 glDeleteBuffers(1, &_vertexBuffer);
73 glDeleteVertexArrays(1, &_vertexArray);
74 }
75
76 - (BOOL)setupI420Program {
77 _i420Program = RTCCreateProgramFromFragmentSource(kI420FragmentShaderSource);
78 if (!_i420Program) {
79 return NO;
80 }
81 _ySampler = glGetUniformLocation(_i420Program, "s_textureY");
82 _uSampler = glGetUniformLocation(_i420Program, "s_textureU");
83 _vSampler = glGetUniformLocation(_i420Program, "s_textureV");
84
85 return (_ySampler >= 0 && _uSampler >= 0 && _vSampler >= 0);
86 }
87
88 - (BOOL)drawFrame:(RTCVideoFrame*)frame {
89 glUseProgram(_i420Program);
90
91 [textureCache uploadFrameToTextures:frame];
92
93 #if !TARGET_OS_IPHONE
94 glBindVertexArray(_vertexArray);
95 #endif
96
97 glActiveTexture(GL_TEXTURE0);
98 glBindTexture(GL_TEXTURE_2D, textureCache.yTexture);
99 glUniform1i(_ySampler, 0);
100
101 glActiveTexture(GL_TEXTURE1);
102 glBindTexture(GL_TEXTURE_2D, textureCache.uTexture);
103 glUniform1i(_uSampler, 1);
104
105 glActiveTexture(GL_TEXTURE2);
106 glBindTexture(GL_TEXTURE_2D, textureCache.vTexture);
107 glUniform1i(_vSampler, 2);
108
109 glBindBuffer(GL_ARRAY_BUFFER, _vertexBuffer);
110 if (!_currentRotation || frame.rotation != *_currentRotation) {
111 _currentRotation = rtc::Optional<RTCVideoRotation>(frame.rotation);
112 RTCSetVertexData(*_currentRotation);
113 }
114 glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
115
116 return YES;
117 }
118
119 @end
OLDNEW

Powered by Google App Engine
This is Rietveld 408576698