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- // Copyright 2015 The Chromium Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style license that can be
- // found in the LICENSE file.
- #ifndef MEDIA_BASE_VIDEO_TYPES_H_
- #define MEDIA_BASE_VIDEO_TYPES_H_
- #include <stdint.h>
- #include <iosfwd>
- #include <string>
- #include "build/build_config.h"
- #include "media/base/media_shmem_export.h"
- namespace media {
- // Pixel formats roughly based on FOURCC labels, see:
- // http://www.fourcc.org/rgb.php and http://www.fourcc.org/yuv.php
- // Logged to UMA, so never reuse values. Leave gaps if necessary.
- // Ordered as planar, semi-planar, YUV-packed, and RGB formats.
- // When a VideoFrame is backed by native textures, VideoPixelFormat describes
- // how those textures should be sampled and combined to produce the final
- // pixels.
- enum VideoPixelFormat {
- PIXEL_FORMAT_UNKNOWN = 0, // Unknown or unspecified format value.
- PIXEL_FORMAT_I420 =
- 1, // 12bpp YUV planar 1x1 Y, 2x2 UV samples, a.k.a. YU12.
- // Note: Chrome does not actually support YVU compositing, so you probably
- // don't actually want to use this. See http://crbug.com/784627.
- PIXEL_FORMAT_YV12 = 2, // 12bpp YVU planar 1x1 Y, 2x2 VU samples.
- PIXEL_FORMAT_I422 = 3, // 16bpp YUV planar 1x1 Y, 2x1 UV samples.
- PIXEL_FORMAT_I420A = 4, // 20bpp YUVA planar 1x1 Y, 2x2 UV, 1x1 A samples.
- PIXEL_FORMAT_I444 = 5, // 24bpp YUV planar, no subsampling.
- PIXEL_FORMAT_NV12 =
- 6, // 12bpp with Y plane followed by a 2x2 interleaved UV plane.
- PIXEL_FORMAT_NV21 =
- 7, // 12bpp with Y plane followed by a 2x2 interleaved VU plane.
- PIXEL_FORMAT_UYVY =
- 8, // 16bpp interleaved 2x1 U, 1x1 Y, 2x1 V, 1x1 Y samples.
- PIXEL_FORMAT_YUY2 =
- 9, // 16bpp interleaved 1x1 Y, 2x1 U, 1x1 Y, 2x1 V samples.
- PIXEL_FORMAT_ARGB = 10, // 32bpp BGRA (byte-order), 1 plane.
- PIXEL_FORMAT_XRGB = 11, // 24bpp BGRX (byte-order), 1 plane.
- PIXEL_FORMAT_RGB24 = 12, // 24bpp BGR (byte-order), 1 plane.
- /* PIXEL_FORMAT_RGB32 = 13, Deprecated */
- PIXEL_FORMAT_MJPEG = 14, // MJPEG compressed.
- /* PIXEL_FORMAT_MT21 = 15, Deprecated */
- // The P* in the formats below designates the number of bits per pixel
- // component. I.e. P9 is 9-bits per pixel component, P10 is 10-bits per pixel
- // component, etc.
- PIXEL_FORMAT_YUV420P9 = 16,
- PIXEL_FORMAT_YUV420P10 = 17,
- PIXEL_FORMAT_YUV422P9 = 18,
- PIXEL_FORMAT_YUV422P10 = 19,
- PIXEL_FORMAT_YUV444P9 = 20,
- PIXEL_FORMAT_YUV444P10 = 21,
- PIXEL_FORMAT_YUV420P12 = 22,
- PIXEL_FORMAT_YUV422P12 = 23,
- PIXEL_FORMAT_YUV444P12 = 24,
- /* PIXEL_FORMAT_Y8 = 25, Deprecated */
- PIXEL_FORMAT_Y16 = 26, // single 16bpp plane.
- PIXEL_FORMAT_ABGR = 27, // 32bpp RGBA (byte-order), 1 plane.
- PIXEL_FORMAT_XBGR = 28, // 24bpp RGBX (byte-order), 1 plane.
- PIXEL_FORMAT_P016LE = 29, // 24bpp NV12, 16 bits per channel
- PIXEL_FORMAT_XR30 =
- 30, // 32bpp BGRX, 10 bits per channel, 2 bits ignored, 1 plane
- PIXEL_FORMAT_XB30 =
- 31, // 32bpp RGBX, 10 bits per channel, 2 bits ignored, 1 plane
- PIXEL_FORMAT_BGRA = 32, // 32bpp ARGB (byte-order), 1 plane.
- PIXEL_FORMAT_RGBAF16 = 33, // Half float RGBA, 1 plane.
- PIXEL_FORMAT_I422A = 34, // 24bpp YUVA planar 1x1 Y, 2x1 UV, 1x1 A samples.
- PIXEL_FORMAT_I444A = 35, // 32bpp YUVA planar, no subsampling.
- // YUVA planar, 10 bits per pixel component.
- PIXEL_FORMAT_YUV420AP10 = 36,
- PIXEL_FORMAT_YUV422AP10 = 37,
- PIXEL_FORMAT_YUV444AP10 = 38,
- // Please update UMA histogram enumeration when adding new formats here.
- PIXEL_FORMAT_MAX =
- PIXEL_FORMAT_YUV444AP10, // Must always be equal to largest entry logged.
- };
- // These values are persisted to logs. Entries should not be renumbered and
- // numeric values should never be reused.
- enum class VideoChromaSampling : uint8_t {
- kUnknown = 0,
- k420, // 4:2:0 chroma channel has 1/2 height/width of luma channel.
- k422, // 4:2:2 chroma channel has same height & 1/2 width of luma channel.
- k444, // 4:4:4 chroma channel has same height/width of luma channel.
- k400, // 4:0:0 monochrome without chroma subsampling.
- // Please update UMA histogram enumeration when adding new formats here.
- kMaxValue = k400, // Must always be equal to largest entry logged.
- };
- // Return the name of chroma sampling format as a string.
- MEDIA_SHMEM_EXPORT std::string VideoChromaSamplingToString(
- VideoChromaSampling chroma_sampling);
- // Returns the name of a Format as a string.
- MEDIA_SHMEM_EXPORT std::string VideoPixelFormatToString(
- VideoPixelFormat format);
- // Stream operator of Format for logging etc.
- MEDIA_SHMEM_EXPORT std::ostream& operator<<(std::ostream& os,
- VideoPixelFormat format);
- // Returns human readable fourcc string.
- // If any of the four characters is non-printable, it outputs
- // "0x<32-bit integer in hex>", e.g. FourccToString(0x66616b00) returns
- // "0x66616b00".
- MEDIA_SHMEM_EXPORT std::string FourccToString(uint32_t fourcc);
- // Returns true if |format| is a YUV format with multiple planes.
- MEDIA_SHMEM_EXPORT bool IsYuvPlanar(VideoPixelFormat format);
- // Returns true if |format| is an RGB format.
- MEDIA_SHMEM_EXPORT bool IsRGB(VideoPixelFormat format);
- // Returns true if |format| has no Alpha channel (hence is always opaque).
- MEDIA_SHMEM_EXPORT bool IsOpaque(VideoPixelFormat format);
- // Returns the number of significant bits per channel.
- MEDIA_SHMEM_EXPORT size_t BitDepth(VideoPixelFormat format);
- } // namespace media
- #endif // MEDIA_BASE_VIDEO_TYPES_H_
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