1 // libjingle 2 // Copyright 2011, Google Inc. 3 // 4 // Redistribution and use in source and binary forms, with or without 5 // modification, are permitted provided that the following conditions are met: 6 // 7 // 1. Redistributions of source code must retain the above copyright notice, 8 // this list of conditions and the following disclaimer. 9 // 2. Redistributions in binary form must reproduce the above copyright notice, 10 // this list of conditions and the following disclaimer in the documentation 11 // and/or other materials provided with the distribution. 12 // 3. The name of the author may not be used to endorse or promote products 13 // derived from this software without specific prior written permission. 14 // 15 // THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 16 // WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 17 // MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 18 // EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 19 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 20 // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 21 // OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 22 // WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 23 // OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 24 // ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 // 26 // Common definition for video, including fourcc and VideoFormat 27 28 #ifndef TALK_SESSION_PHONE_VIDEOCOMMON_H_ 29 #define TALK_SESSION_PHONE_VIDEOCOMMON_H_ 30 31 #include <string> 32 33 #include "talk/base/basictypes.h" 34 35 namespace cricket { 36 37 ////////////////////////////////////////////////////////////////////////////// 38 // Definition of fourcc. 39 ////////////////////////////////////////////////////////////////////////////// 40 // Convert four characters to a fourcc code. 41 // Needs to be a macro otherwise the OS X compiler complains when the kFormat* 42 // constants are used in a switch. 43 #define FOURCC(a, b, c, d) (\ 44 (static_cast<uint32>(a)) | (static_cast<uint32>(b) << 8) | \ 45 (static_cast<uint32>(c) << 16) | (static_cast<uint32>(d) << 24)) 46 47 // Get the name, that is, string with four characters, of a fourcc code. 48 inline std::string GetFourccName(uint32 fourcc) { 49 std::string name; 50 name.push_back(static_cast<char>(fourcc & 0xFF)); 51 name.push_back(static_cast<char>((fourcc >> 8) & 0xFF)); 52 name.push_back(static_cast<char>((fourcc >> 16) & 0xFF)); 53 name.push_back(static_cast<char>((fourcc >> 24) & 0xFF)); 54 return name; 55 } 56 57 // FourCC codes used in Google Talk. 58 // Some good pages discussing FourCC codes: 59 // http://developer.apple.com/quicktime/icefloe/dispatch020.html 60 // http://www.fourcc.org/yuv.php 61 enum FourCC { 62 // Canonical fourcc codes used in our code. 63 FOURCC_I420 = FOURCC('I', '4', '2', '0'), 64 FOURCC_YUY2 = FOURCC('Y', 'U', 'Y', '2'), 65 FOURCC_UYVY = FOURCC('U', 'Y', 'V', 'Y'), 66 FOURCC_M420 = FOURCC('M', '4', '2', '0'), 67 FOURCC_24BG = FOURCC('2', '4', 'B', 'G'), 68 FOURCC_ABGR = FOURCC('A', 'B', 'G', 'R'), 69 FOURCC_BGRA = FOURCC('B', 'G', 'R', 'A'), 70 FOURCC_ARGB = FOURCC('A', 'R', 'G', 'B'), 71 FOURCC_MJPG = FOURCC('M', 'J', 'P', 'G'), 72 FOURCC_RAW = FOURCC('r', 'a', 'w', ' '), 73 FOURCC_NV21 = FOURCC('N', 'V', '2', '1'), 74 FOURCC_NV12 = FOURCC('N', 'V', '1', '2'), 75 // Next four are Bayer RGB formats. The four characters define the order of 76 // the colours in each 2x2 pixel grid, going left-to-right and top-to-bottom. 77 FOURCC_RGGB = FOURCC('R', 'G', 'G', 'B'), 78 FOURCC_BGGR = FOURCC('B', 'G', 'G', 'R'), 79 FOURCC_GRBG = FOURCC('G', 'R', 'B', 'G'), 80 FOURCC_GBRG = FOURCC('G', 'B', 'R', 'G'), 81 82 // Aliases for canonical fourcc codes, replaced with their canonical 83 // equivalents by CanonicalFourCC(). 84 FOURCC_IYUV = FOURCC('I', 'Y', 'U', 'V'), // Alias for I420 85 FOURCC_YU12 = FOURCC('Y', 'U', '1', '2'), // Alias for I420 86 FOURCC_YUYV = FOURCC('Y', 'U', 'Y', 'V'), // Alias for YUY2 87 FOURCC_YUVS = FOURCC('y', 'u', 'v', 's'), // Alias for YUY2 on Mac 88 FOURCC_HDYC = FOURCC('H', 'D', 'Y', 'C'), // Alias for UYVY 89 FOURCC_2VUY = FOURCC('2', 'v', 'u', 'y'), // Alias for UYVY 90 FOURCC_JPEG = FOURCC('J', 'P', 'E', 'G'), // Alias for MJPG 91 FOURCC_BA81 = FOURCC('B', 'A', '8', '1'), // Alias for BGGR 92 93 // Match any fourcc. 94 FOURCC_ANY = 0xFFFFFFFF, 95 }; 96 97 // Converts fourcc aliases into canonical ones. 98 uint32 CanonicalFourCC(uint32 fourcc); 99 100 ////////////////////////////////////////////////////////////////////////////// 101 // Definition of VideoFormat. 102 ////////////////////////////////////////////////////////////////////////////// 103 104 static const int64 kNumNanosecsPerSec = 1000000000; 105 106 struct VideoFormat { 107 static const int64 kMinimumInterval = kNumNanosecsPerSec / 10000; // 10k fps 108 109 VideoFormat() : width(0), height(0), interval(0), fourcc(0) {} 110 111 VideoFormat(int w, int h, int64 interval_ns, uint32 cc) 112 : width(w), 113 height(h), 114 interval(interval_ns), 115 fourcc(cc) { 116 } 117 118 VideoFormat(const VideoFormat& format) 119 : width(format.width), 120 height(format.height), 121 interval(format.interval), 122 fourcc(format.fourcc) { 123 } 124 125 static int64 FpsToInterval(int fps) { 126 return fps ? kNumNanosecsPerSec / fps : kMinimumInterval; 127 } 128 129 static int IntervalToFps(int64 interval) { 130 // Normalize the interval first. 131 interval = talk_base::_max(interval, kMinimumInterval); 132 return static_cast<int>(kNumNanosecsPerSec / interval); 133 } 134 135 bool operator==(const VideoFormat& format) const { 136 return width == format.width && height == format.height && 137 interval == format.interval && fourcc == format.fourcc; 138 } 139 140 bool operator!=(const VideoFormat& format) const { 141 return !(*this == format); 142 } 143 144 bool operator<(const VideoFormat& format) const { 145 return (fourcc < format.fourcc) || 146 (fourcc == format.fourcc && width < format.width) || 147 (fourcc == format.fourcc && width == format.width && 148 height < format.height) || 149 (fourcc == format.fourcc && width == format.width && 150 height == format.height && interval > format.interval); 151 } 152 153 int framerate() const { return IntervalToFps(interval); } 154 155 int width; // in number of pixels 156 int height; // in number of pixels 157 int64 interval; // in nanoseconds 158 uint32 fourcc; // color space. FOURCC_ANY means that any color space is OK. 159 }; 160 161 // Result of video capturer start. 162 enum CaptureResult { 163 CR_SUCCESS, // The capturer starts successfully. 164 CR_PENDING, // The capturer is pending to start the capture device. 165 CR_FAILURE, // The capturer fails to start. 166 CR_NO_DEVICE, // The capturer has no device and fails to start. 167 }; 168 169 } // namespace cricket 170 171 #endif // TALK_SESSION_PHONE_VIDEOCOMMON_H_ 172
