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- // Copyright 2019 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_GPU_CHROMEOS_FOURCC_H_
- #define MEDIA_GPU_CHROMEOS_FOURCC_H_
- #include <stdint.h>
- #include <string>
- #include "media/base/video_types.h"
- #include "media/gpu/buildflags.h"
- #include "media/gpu/media_gpu_export.h"
- #include "third_party/abseil-cpp/absl/types/optional.h"
- namespace media {
- // Composes a Fourcc value.
- constexpr uint32_t ComposeFourcc(char a, char b, char c, char d) {
- return static_cast<uint32_t>(a) | (static_cast<uint32_t>(b) << 8) |
- (static_cast<uint32_t>(c) << 16) | (static_cast<uint32_t>(d) << 24);
- }
- // Fourcc enum holder and converters.
- // Usage:
- // Fourcc f1(Fourcc::NV12);
- // EXPECT_EQ("NV12", f1.ToString());
- // Fourcc f2 = Fourcc::FromVideoPixelFormat(PIXEL_FORMAT_NV12);
- // EXPECT_EQ(f2, f1);
- class MEDIA_GPU_EXPORT Fourcc {
- public:
- enum Value : uint32_t {
- // YUV420 single-planar formats.
- // https://linuxtv.org/downloads/v4l-dvb-apis-new/userspace-api/v4l/pixfmt-yuv420.html
- // Maps to PIXEL_FORMAT_I420, V4L2_PIX_FMT_YUV420, VA_FOURCC_I420.
- // 12bpp YUV planar 1x1 Y, 2x2 UV samples.
- YU12 = ComposeFourcc('Y', 'U', '1', '2'),
- // Maps to PIXEL_FORMAT_YV12, V4L2_PIX_FMT_YVU420, VA_FOURCC_YV12.
- // 12bpp YVU planar 1x1 Y, 2x2 VU samples.
- YV12 = ComposeFourcc('Y', 'V', '1', '2'),
- // YUV420 multi-planar format.
- // https://linuxtv.org/downloads/v4l-dvb-apis-new/userspace-api/v4l/pixfmt-yuv420m.html
- // Maps to PIXEL_FORMAT_I420, V4L2_PIX_FMT_YUV420M.
- YM12 = ComposeFourcc('Y', 'M', '1', '2'),
- // Maps to PIXEL_FORMAT_YV12, V4L2_PIX_FMT_YVU420M.
- YM21 = ComposeFourcc('Y', 'M', '2', '1'),
- // YUYV format.
- // https://linuxtv.org/downloads/v4l-dvb-apis-new/userspace-api/v4l/pixfmt-yuyv.html
- // Maps to PIXEL_FORMAT_YUY2, V4L2_PIX_FMT_YUYV, VA_FOURCC_YUY2.
- // 16bpp YUV planar (YUV 4:2:2), YUYV (byte-order), 1 plane.
- YUYV = ComposeFourcc('Y', 'U', 'Y', 'V'),
- // NV12 single-planar format.
- // https://linuxtv.org/downloads/v4l-dvb-apis-new/userspace-api/v4l/pixfmt-nv12.html
- // Maps to PIXEL_FORMAT_NV12, V4L2_PIX_FMT_NV12, VA_FOURCC_NV12.
- // 12bpp with Y plane followed by a 2x2 interleaved UV plane.
- NV12 = ComposeFourcc('N', 'V', '1', '2'),
- // Maps to PIXEL_FORMAT_NV21, V4L2_PIX_FMT_NV21, VA_FOURCC_NV21.
- // 12bpp with Y plane followed by a 2x2 interleaved VU plane.
- NV21 = ComposeFourcc('N', 'V', '2', '1'),
- // NV12 multi-planar format.
- // https://linuxtv.org/downloads/v4l-dvb-apis-new/userspace-api/v4l/pixfmt-nv12m.html
- // Maps to PIXEL_FORMAT_NV12, V4L2_PIX_FMT_NV12M,
- NM12 = ComposeFourcc('N', 'M', '1', '2'),
- // Maps to PIXEL_FORMAT_NV21, V4L2_PIX_FMT_NV21M.
- NM21 = ComposeFourcc('N', 'M', '2', '1'),
- // YUV422 single-planar format.
- // https://linuxtv.org/downloads/v4l-dvb-apis-new/userspace-api/v4l/pixfmt-yuv422p.html
- // Maps to PIXEL_FORMAT_I422, V4L2_PIX_FMT_YUV422P.
- YU16 = ComposeFourcc('4', '2', '2', 'P'),
- // YUV422 multi-planar format.
- // https://linuxtv.org/downloads/v4l-dvb-apis-new/userspace-api/v4l/pixfmt-yuv422m.html
- // Maps to PIXEL_FORMAT_I422, V4L2_PIX_FMT_YUV422M
- // 16bpp YUV planar 1x1 Y, 2x1 UV samples.
- YM16 = ComposeFourcc('Y', 'M', '1', '6'),
- // V4L2 proprietary format.
- // https://linuxtv.org/downloads/v4l-dvb-apis-new/userspace-api/v4l/pixfmt-reserved.html
- // Maps to V4L2_PIX_FMT_MT21C.
- // It is used for MT8173 hardware video decoder output and should be
- // converted by MT8173 image processor for compositor to render.
- MT21 = ComposeFourcc('M', 'T', '2', '1'),
- // Maps to V4L2_PIX_FMT_MM21.
- // It is used for MT8183 hardware video decoder.
- MM21 = ComposeFourcc('M', 'M', '2', '1'),
- // Two-plane 10-bit YUV 4:2:0. Each sample is a two-byte little-endian value
- // with the bottom six bits ignored.
- P010 = ComposeFourcc('P', '0', '1', '0'),
- };
- explicit constexpr Fourcc(Fourcc::Value fourcc) : value_(fourcc) {}
- bool operator==(const Fourcc& rhs) const { return value_ == rhs.value_; }
- // Factory methods:
- // Builds a Fourcc from a given fourcc code. This will return a valid
- // Fourcc if the argument is part of the |Value| enum, or nullopt otherwise.
- static absl::optional<Fourcc> FromUint32(uint32_t fourcc);
- // Converts a VideoPixelFormat to Fourcc.
- // Returns nullopt for invalid input.
- // Note that a VideoPixelFormat may have two Fourcc counterparts. Caller has
- // to specify if it is for single-planar or multi-planar format.
- static absl::optional<Fourcc> FromVideoPixelFormat(
- VideoPixelFormat pixel_format,
- bool single_planar = true);
- #if BUILDFLAG(USE_V4L2_CODEC)
- // Converts a V4L2PixFmt to Fourcc.
- // Returns nullopt for invalid input.
- static absl::optional<Fourcc> FromV4L2PixFmt(uint32_t v4l2_pix_fmt);
- #endif // BUILDFLAG(USE_V4L2_CODEC)
- #if BUILDFLAG(USE_VAAPI)
- // Converts a VAFourCC to Fourcc.
- // Returns nullopt for invalid input.
- static absl::optional<Fourcc> FromVAFourCC(uint32_t va_fourcc);
- #endif // BUILDFLAG(USE_VAAPI)
- // Value getters:
- // Returns the VideoPixelFormat counterpart of the value.
- // Returns PIXEL_FORMAT_UNKNOWN if no mapping is found.
- VideoPixelFormat ToVideoPixelFormat() const;
- #if BUILDFLAG(USE_V4L2_CODEC)
- // Returns the V4L2PixFmt counterpart of the value.
- // Returns 0 if no mapping is found.
- uint32_t ToV4L2PixFmt() const;
- #endif // BUILDFLAG(USE_V4L2_CODEC)
- #if BUILDFLAG(USE_VAAPI)
- // Returns the VAFourCC counterpart of the value.
- // Returns nullopt if no mapping is found.
- absl::optional<uint32_t> ToVAFourCC() const;
- #endif // BUILDFLAG(USE_VAAPI)
- // Returns the single-planar Fourcc of the value. If value is a single-planar,
- // returns the same Fourcc. Returns nullopt if no mapping is found.
- absl::optional<Fourcc> ToSinglePlanar() const;
- // Returns whether |value_| is multi planar format.
- bool IsMultiPlanar() const;
- // Outputs human readable fourcc string, e.g. "NV12".
- std::string ToString() const;
- private:
- Value value_;
- };
- MEDIA_GPU_EXPORT bool operator!=(const Fourcc& lhs, const Fourcc& rhs);
- } // namespace media
- #endif // MEDIA_GPU_CHROMEOS_FOURCC_H_
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