96 lines
3.6 KiB
C++
96 lines
3.6 KiB
C++
// Copyright 2015 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Note: ported from Chromium commit head: 3b7ce92816e2
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// Note: only necessary functions are ported from video_types.h
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#ifndef VIDEO_PIXEL_FORMAT_H_
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#define VIDEO_PIXEL_FORMAT_H_
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#include <string>
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namespace media {
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// Pixel formats roughly based on FOURCC labels, see:
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// http://www.fourcc.org/rgb.php and http://www.fourcc.org/yuv.php
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// Logged to UMA, so never reuse values. Leave gaps if necessary.
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// Ordered as planar, semi-planar, YUV-packed, and RGB formats.
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// When a VideoFrame is backed by native textures, VideoPixelFormat describes
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// how those textures should be sampled and combined to produce the final
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// pixels.
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enum VideoPixelFormat {
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PIXEL_FORMAT_UNKNOWN = 0, // Unknown or unspecified format value.
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PIXEL_FORMAT_I420 =
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1, // 12bpp YUV planar 1x1 Y, 2x2 UV samples, a.k.a. YU12.
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// Note: Chrome does not actually support YVU compositing, so you probably
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// don't actually want to use this. See http://crbug.com/784627.
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PIXEL_FORMAT_YV12 = 2, // 12bpp YVU planar 1x1 Y, 2x2 VU samples.
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PIXEL_FORMAT_I422 = 3, // 16bpp YUV planar 1x1 Y, 2x1 UV samples.
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PIXEL_FORMAT_I420A = 4, // 20bpp YUVA planar 1x1 Y, 2x2 UV, 1x1 A samples.
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PIXEL_FORMAT_I444 = 5, // 24bpp YUV planar, no subsampling.
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PIXEL_FORMAT_NV12 =
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6, // 12bpp with Y plane followed by a 2x2 interleaved UV plane.
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PIXEL_FORMAT_NV21 =
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7, // 12bpp with Y plane followed by a 2x2 interleaved VU plane.
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/* PIXEL_FORMAT_UYVY = 8, Deprecated */
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PIXEL_FORMAT_YUY2 =
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9, // 16bpp interleaved 1x1 Y, 2x1 U, 1x1 Y, 2x1 V samples.
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PIXEL_FORMAT_ARGB = 10, // 32bpp BGRA (byte-order), 1 plane.
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PIXEL_FORMAT_XRGB = 11, // 24bpp BGRX (byte-order), 1 plane.
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PIXEL_FORMAT_RGB24 = 12, // 24bpp BGR (byte-order), 1 plane.
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/* PIXEL_FORMAT_RGB32 = 13, Deprecated */
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PIXEL_FORMAT_MJPEG = 14, // MJPEG compressed.
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/* PIXEL_FORMAT_MT21 = 15, Deprecated */
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// The P* in the formats below designates the number of bits per pixel
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// component. I.e. P9 is 9-bits per pixel component, P10 is 10-bits per pixel
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// component, etc.
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PIXEL_FORMAT_YUV420P9 = 16,
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PIXEL_FORMAT_YUV420P10 = 17,
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PIXEL_FORMAT_YUV422P9 = 18,
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PIXEL_FORMAT_YUV422P10 = 19,
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PIXEL_FORMAT_YUV444P9 = 20,
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PIXEL_FORMAT_YUV444P10 = 21,
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PIXEL_FORMAT_YUV420P12 = 22,
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PIXEL_FORMAT_YUV422P12 = 23,
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PIXEL_FORMAT_YUV444P12 = 24,
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/* PIXEL_FORMAT_Y8 = 25, Deprecated */
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PIXEL_FORMAT_Y16 = 26, // single 16bpp plane.
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PIXEL_FORMAT_ABGR = 27, // 32bpp RGBA (byte-order), 1 plane.
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PIXEL_FORMAT_XBGR = 28, // 24bpp RGBX (byte-order), 1 plane.
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PIXEL_FORMAT_P016LE = 29, // 24bpp NV12, 16 bits per channel
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PIXEL_FORMAT_XR30 =
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30, // 32bpp BGRX, 10 bits per channel, 2 bits ignored, 1 plane
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PIXEL_FORMAT_XB30 =
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31, // 32bpp RGBX, 10 bits per channel, 2 bits ignored, 1 plane
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PIXEL_FORMAT_BGRA = 32, // 32bpp ARGB (byte-order), 1 plane.
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// Please update UMA histogram enumeration when adding new formats here.
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PIXEL_FORMAT_MAX =
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PIXEL_FORMAT_BGRA, // Must always be equal to largest entry logged.
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};
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// Returns the name of a Format as a string.
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std::string VideoPixelFormatToString(VideoPixelFormat format);
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// Returns human readable fourcc string.
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// If any of the four characters is non-printable, it outputs
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// "0x<32-bit integer in hex>", e.g. FourccToString(0x66616b00) returns
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// "0x66616b00".
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std::string FourccToString(uint32_t fourcc);
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// Returns the number of significant bits per channel.
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size_t BitDepth(VideoPixelFormat format);
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} // namespace media
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#endif // VIDEO_PIXEL_FORMAT_H_
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