Index: talk/media/base/videocommon.h |
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-/* |
- * libjingle |
- * Copyright 2004 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. |
- */ |
- |
-// Common definition for video, including fourcc and VideoFormat. |
- |
-#ifndef TALK_MEDIA_BASE_VIDEOCOMMON_H_ // NOLINT |
-#define TALK_MEDIA_BASE_VIDEOCOMMON_H_ |
- |
-#include <string> |
- |
-#include "webrtc/base/basictypes.h" |
-#include "webrtc/base/timeutils.h" |
- |
-namespace cricket { |
- |
-// TODO(janahan): For now, a hard-coded ssrc is used as the video ssrc. |
-// This is because when the video frame is passed to the mediaprocessor for |
-// processing, it doesn't have the correct ssrc. Since currently only Tx |
-// Video processing is supported, this is ok. When we switch over to trigger |
-// from capturer, this should be fixed and this const removed. |
-const uint32_t kDummyVideoSsrc = 0xFFFFFFFF; |
- |
-// Minimum interval is 10k fps. |
-#define FPS_TO_INTERVAL(fps) \ |
- (fps ? rtc::kNumNanosecsPerSec / fps : \ |
- rtc::kNumNanosecsPerSec / 10000) |
- |
-////////////////////////////////////////////////////////////////////////////// |
-// Definition of FourCC codes |
-////////////////////////////////////////////////////////////////////////////// |
-// Convert four characters to a FourCC code. |
-// Needs to be a macro otherwise the OS X compiler complains when the kFormat* |
-// constants are used in a switch. |
-#define FOURCC(a, b, c, d) \ |
- ((static_cast<uint32_t>(a)) | (static_cast<uint32_t>(b) << 8) | \ |
- (static_cast<uint32_t>(c) << 16) | (static_cast<uint32_t>(d) << 24)) |
-// Some pages discussing FourCC codes: |
-// http://www.fourcc.org/yuv.php |
-// http://v4l2spec.bytesex.org/spec/book1.htm |
-// http://developer.apple.com/quicktime/icefloe/dispatch020.html |
-// http://msdn.microsoft.com/library/windows/desktop/dd206750.aspx#nv12 |
-// http://people.xiph.org/~xiphmont/containers/nut/nut4cc.txt |
- |
-// FourCC codes grouped according to implementation efficiency. |
-// Primary formats should convert in 1 efficient step. |
-// Secondary formats are converted in 2 steps. |
-// Auxilliary formats call primary converters. |
-enum FourCC { |
- // 9 Primary YUV formats: 5 planar, 2 biplanar, 2 packed. |
- FOURCC_I420 = FOURCC('I', '4', '2', '0'), |
- FOURCC_I422 = FOURCC('I', '4', '2', '2'), |
- FOURCC_I444 = FOURCC('I', '4', '4', '4'), |
- FOURCC_I411 = FOURCC('I', '4', '1', '1'), |
- FOURCC_I400 = FOURCC('I', '4', '0', '0'), |
- FOURCC_NV21 = FOURCC('N', 'V', '2', '1'), |
- FOURCC_NV12 = FOURCC('N', 'V', '1', '2'), |
- FOURCC_YUY2 = FOURCC('Y', 'U', 'Y', '2'), |
- FOURCC_UYVY = FOURCC('U', 'Y', 'V', 'Y'), |
- |
- // 2 Secondary YUV formats: row biplanar. |
- FOURCC_M420 = FOURCC('M', '4', '2', '0'), |
- |
- // 9 Primary RGB formats: 4 32 bpp, 2 24 bpp, 3 16 bpp. |
- FOURCC_ARGB = FOURCC('A', 'R', 'G', 'B'), |
- FOURCC_BGRA = FOURCC('B', 'G', 'R', 'A'), |
- FOURCC_ABGR = FOURCC('A', 'B', 'G', 'R'), |
- FOURCC_24BG = FOURCC('2', '4', 'B', 'G'), |
- FOURCC_RAW = FOURCC('r', 'a', 'w', ' '), |
- FOURCC_RGBA = FOURCC('R', 'G', 'B', 'A'), |
- FOURCC_RGBP = FOURCC('R', 'G', 'B', 'P'), // bgr565. |
- FOURCC_RGBO = FOURCC('R', 'G', 'B', 'O'), // abgr1555. |
- FOURCC_R444 = FOURCC('R', '4', '4', '4'), // argb4444. |
- |
- // 4 Secondary RGB formats: 4 Bayer Patterns. |
- FOURCC_RGGB = FOURCC('R', 'G', 'G', 'B'), |
- FOURCC_BGGR = FOURCC('B', 'G', 'G', 'R'), |
- FOURCC_GRBG = FOURCC('G', 'R', 'B', 'G'), |
- FOURCC_GBRG = FOURCC('G', 'B', 'R', 'G'), |
- |
- // 1 Primary Compressed YUV format. |
- FOURCC_MJPG = FOURCC('M', 'J', 'P', 'G'), |
- |
- // 5 Auxiliary YUV variations: 3 with U and V planes are swapped, 1 Alias. |
- FOURCC_YV12 = FOURCC('Y', 'V', '1', '2'), |
- FOURCC_YV16 = FOURCC('Y', 'V', '1', '6'), |
- FOURCC_YV24 = FOURCC('Y', 'V', '2', '4'), |
- FOURCC_YU12 = FOURCC('Y', 'U', '1', '2'), // Linux version of I420. |
- FOURCC_J420 = FOURCC('J', '4', '2', '0'), |
- FOURCC_J400 = FOURCC('J', '4', '0', '0'), |
- |
- // 14 Auxiliary aliases. CanonicalFourCC() maps these to canonical fourcc. |
- FOURCC_IYUV = FOURCC('I', 'Y', 'U', 'V'), // Alias for I420. |
- FOURCC_YU16 = FOURCC('Y', 'U', '1', '6'), // Alias for I422. |
- FOURCC_YU24 = FOURCC('Y', 'U', '2', '4'), // Alias for I444. |
- FOURCC_YUYV = FOURCC('Y', 'U', 'Y', 'V'), // Alias for YUY2. |
- FOURCC_YUVS = FOURCC('y', 'u', 'v', 's'), // Alias for YUY2 on Mac. |
- FOURCC_HDYC = FOURCC('H', 'D', 'Y', 'C'), // Alias for UYVY. |
- FOURCC_2VUY = FOURCC('2', 'v', 'u', 'y'), // Alias for UYVY on Mac. |
- FOURCC_JPEG = FOURCC('J', 'P', 'E', 'G'), // Alias for MJPG. |
- FOURCC_DMB1 = FOURCC('d', 'm', 'b', '1'), // Alias for MJPG on Mac. |
- FOURCC_BA81 = FOURCC('B', 'A', '8', '1'), // Alias for BGGR. |
- FOURCC_RGB3 = FOURCC('R', 'G', 'B', '3'), // Alias for RAW. |
- FOURCC_BGR3 = FOURCC('B', 'G', 'R', '3'), // Alias for 24BG. |
- FOURCC_CM32 = FOURCC(0, 0, 0, 32), // Alias for BGRA kCMPixelFormat_32ARGB |
- FOURCC_CM24 = FOURCC(0, 0, 0, 24), // Alias for RAW kCMPixelFormat_24RGB |
- |
- // 1 Auxiliary compressed YUV format set aside for capturer. |
- FOURCC_H264 = FOURCC('H', '2', '6', '4'), |
-}; |
- |
-// Match any fourcc. |
- |
-// We move this out of the enum because using it in many places caused |
-// the compiler to get grumpy, presumably since the above enum is |
-// backed by an int. |
-static const uint32_t FOURCC_ANY = 0xFFFFFFFF; |
- |
-// Converts fourcc aliases into canonical ones. |
-uint32_t CanonicalFourCC(uint32_t fourcc); |
- |
-// Get FourCC code as a string. |
-inline std::string GetFourccName(uint32_t fourcc) { |
- std::string name; |
- name.push_back(static_cast<char>(fourcc & 0xFF)); |
- name.push_back(static_cast<char>((fourcc >> 8) & 0xFF)); |
- name.push_back(static_cast<char>((fourcc >> 16) & 0xFF)); |
- name.push_back(static_cast<char>((fourcc >> 24) & 0xFF)); |
- return name; |
-} |
- |
-// Computes a scale less to fit in max_pixels while maintaining aspect ratio. |
-void ComputeScaleMaxPixels(int frame_width, int frame_height, int max_pixels, |
- int* scaled_width, int* scaled_height); |
- |
-// For low fps, max pixels limit is set to Retina MacBookPro 15" resolution of |
-// 2880 x 1800 as of 4/18/2013. |
-// For high fps, maximum pixels limit is set based on common 24" monitor |
-// resolution of 2048 x 1280 as of 6/13/2013. The Retina resolution is |
-// therefore reduced to 1440 x 900. |
-void ComputeScale(int frame_width, int frame_height, int fps, |
- int* scaled_width, int* scaled_height); |
- |
-// Compute the frame size that conversion should crop to based on aspect ratio. |
-// Ensures size is multiple of 2 due to I420 and conversion limitations. |
-void ComputeCrop(int cropped_format_width, int cropped_format_height, |
- int frame_width, int frame_height, |
- int pixel_width, int pixel_height, |
- int rotation, |
- int* cropped_width, int* cropped_height); |
- |
-// Compute the frame size that makes pixels square pixel aspect ratio. |
-void ComputeScaleToSquarePixels(int in_width, int in_height, |
- int pixel_width, int pixel_height, |
- int* scaled_width, int* scaled_height); |
- |
-////////////////////////////////////////////////////////////////////////////// |
-// Definition of VideoFormat. |
-////////////////////////////////////////////////////////////////////////////// |
- |
-// VideoFormat with Plain Old Data for global variables. |
-struct VideoFormatPod { |
- int width; // Number of pixels. |
- int height; // Number of pixels. |
- int64_t interval; // Nanoseconds. |
- uint32_t fourcc; // Color space. FOURCC_ANY means that any color space is OK. |
-}; |
- |
-struct VideoFormat : VideoFormatPod { |
- static const int64_t kMinimumInterval = |
- rtc::kNumNanosecsPerSec / 10000; // 10k fps. |
- |
- VideoFormat() { |
- Construct(0, 0, 0, 0); |
- } |
- |
- VideoFormat(int w, int h, int64_t interval_ns, uint32_t cc) { |
- Construct(w, h, interval_ns, cc); |
- } |
- |
- explicit VideoFormat(const VideoFormatPod& format) { |
- Construct(format.width, format.height, format.interval, format.fourcc); |
- } |
- |
- void Construct(int w, int h, int64_t interval_ns, uint32_t cc) { |
- width = w; |
- height = h; |
- interval = interval_ns; |
- fourcc = cc; |
- } |
- |
- static int64_t FpsToInterval(int fps) { |
- return fps ? rtc::kNumNanosecsPerSec / fps : kMinimumInterval; |
- } |
- |
- static int IntervalToFps(int64_t interval) { |
- if (!interval) { |
- return 0; |
- } |
- return static_cast<int>(rtc::kNumNanosecsPerSec / interval); |
- } |
- |
- static float IntervalToFpsFloat(int64_t interval) { |
- if (!interval) { |
- return 0.f; |
- } |
- return static_cast<float>(rtc::kNumNanosecsPerSec) / |
- static_cast<float>(interval); |
- } |
- |
- bool operator==(const VideoFormat& format) const { |
- return width == format.width && height == format.height && |
- interval == format.interval && fourcc == format.fourcc; |
- } |
- |
- bool operator!=(const VideoFormat& format) const { |
- return !(*this == format); |
- } |
- |
- bool operator<(const VideoFormat& format) const { |
- return (fourcc < format.fourcc) || |
- (fourcc == format.fourcc && width < format.width) || |
- (fourcc == format.fourcc && width == format.width && |
- height < format.height) || |
- (fourcc == format.fourcc && width == format.width && |
- height == format.height && interval > format.interval); |
- } |
- |
- int framerate() const { return IntervalToFps(interval); } |
- |
- // Check if both width and height are 0. |
- bool IsSize0x0() const { return 0 == width && 0 == height; } |
- |
- // Check if this format is less than another one by comparing the resolution |
- // and frame rate. |
- bool IsPixelRateLess(const VideoFormat& format) const { |
- return width * height * framerate() < |
- format.width * format.height * format.framerate(); |
- } |
- |
- // Get a string presentation in the form of "fourcc width x height x fps" |
- std::string ToString() const; |
-}; |
- |
-} // namespace cricket |
- |
-#endif // TALK_MEDIA_BASE_VIDEOCOMMON_H_ // NOLINT |