Migrate content/common/gpu/media code to media/gpu

content/common/gpu/media/v4l2_device.h

-// Copyright 2014 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.
-//
-// This file defines the V4L2Device interface which is used by the
-// V4L2DecodeAccelerator class to delegate/pass the device specific
-// handling of any of the functionalities.
-
-#ifndef CONTENT_COMMON_GPU_MEDIA_V4L2_DEVICE_H_
-#define CONTENT_COMMON_GPU_MEDIA_V4L2_DEVICE_H_
-
-#include <stddef.h>
-#include <stdint.h>
-
-#include <linux/videodev2.h>
-
-#include "base/files/scoped_file.h"
-#include "base/memory/ref_counted.h"
-#include "content/common/content_export.h"
-#include "media/base/video_decoder_config.h"
-#include "media/base/video_frame.h"
-#include "media/video/video_decode_accelerator.h"
-#include "ui/gfx/geometry/size.h"
-#include "ui/gl/gl_bindings.h"
-
-// TODO(posciak): remove this once V4L2 headers are updated.
-#define V4L2_PIX_FMT_VP9 v4l2_fourcc('V', 'P', '9', '0')
-#define V4L2_PIX_FMT_H264_SLICE v4l2_fourcc('S', '2', '6', '4')
-#define V4L2_PIX_FMT_VP8_FRAME v4l2_fourcc('V', 'P', '8', 'F')
-#define V4L2_PIX_FMT_MT21 v4l2_fourcc('M', 'T', '2', '1')
-
-namespace content {
-
-class CONTENT_EXPORT V4L2Device
-    : public base::RefCountedThreadSafe<V4L2Device> {
- public:
-  // Utility format conversion functions
-  static media::VideoPixelFormat V4L2PixFmtToVideoPixelFormat(uint32_t format);
-  static uint32_t VideoPixelFormatToV4L2PixFmt(media::VideoPixelFormat format);
-  static uint32_t VideoCodecProfileToV4L2PixFmt(
-      media::VideoCodecProfile profile,
-      bool slice_based);
-  static uint32_t V4L2PixFmtToDrmFormat(uint32_t format);
-  // Convert format requirements requested by a V4L2 device to gfx::Size.
-  static gfx::Size CodedSizeFromV4L2Format(struct v4l2_format format);
-
-  enum Type {
-    kDecoder,
-    kEncoder,
-    kImageProcessor,
-    kJpegDecoder,
-  };
-
-  // Creates and initializes an appropriate V4L2Device of |type| for the
-  // current platform and returns a scoped_refptr<V4L2Device> on success, or
-  // NULL.
-  static scoped_refptr<V4L2Device> Create(Type type);
-
-  // Parameters and return value are the same as for the standard ioctl() system
-  // call.
-  virtual int Ioctl(int request, void* arg) = 0;
-
-  // This method sleeps until either:
-  // - SetDevicePollInterrupt() is called (on another thread),
-  // - |poll_device| is true, and there is new data to be read from the device,
-  //   or an event from the device has arrived; in the latter case
-  //   |*event_pending| will be set to true.
-  // Returns false on error, true otherwise.
-  // This method should be called from a separate thread.
-  virtual bool Poll(bool poll_device, bool* event_pending) = 0;
-
-  // These methods are used to interrupt the thread sleeping on Poll() and force
-  // it to return regardless of device state, which is usually when the client
-  // is no longer interested in what happens with the device (on cleanup,
-  // client state change, etc.). When SetDevicePollInterrupt() is called, Poll()
-  // will return immediately, and any subsequent calls to it will also do so
-  // until ClearDevicePollInterrupt() is called.
-  virtual bool SetDevicePollInterrupt() = 0;
-  virtual bool ClearDevicePollInterrupt() = 0;
-
-  // Wrappers for standard mmap/munmap system calls.
-  virtual void* Mmap(void* addr,
-                     unsigned int len,
-                     int prot,
-                     int flags,
-                     unsigned int offset) = 0;
-  virtual void Munmap(void* addr, unsigned int len) = 0;
-
-  // Initializes the V4L2Device to operate as a device of |type|.
-  // Returns true on success.
-  virtual bool Initialize() = 0;
-
-  // Return a vector of dmabuf file descriptors, exported for V4L2 buffer with
-  // |index|, assuming the buffer contains |num_planes| V4L2 planes and is of
-  // |type|. Return an empty vector on failure.
-  // The caller is responsible for closing the file descriptors after use.
-  virtual std::vector<base::ScopedFD> GetDmabufsForV4L2Buffer(
-      int index,
-      size_t num_planes,
-      enum v4l2_buf_type type) = 0;
-
-  // Return true if the given V4L2 pixfmt can be used in CreateEGLImage()
-  // for the current platform.
-  virtual bool CanCreateEGLImageFrom(uint32_t v4l2_pixfmt) = 0;
-
-  // Create an EGLImage from provided |dmabuf_fds| and bind |texture_id| to it.
-  // Some implementations may also require the V4L2 |buffer_index| of the buffer
-  // for which |dmabuf_fds| have been exported.
-  // The caller may choose to close the file descriptors after this method
-  // returns, and may expect the buffers to remain valid for the lifetime of
-  // the created EGLImage.
-  // Return EGL_NO_IMAGE_KHR on failure.
-  virtual EGLImageKHR CreateEGLImage(
-      EGLDisplay egl_display,
-      EGLContext egl_context,
-      GLuint texture_id,
-      const gfx::Size& size,
-      unsigned int buffer_index,
-      uint32_t v4l2_pixfmt,
-      const std::vector<base::ScopedFD>& dmabuf_fds) = 0;
-
-  // Destroys the EGLImageKHR.
-  virtual EGLBoolean DestroyEGLImage(EGLDisplay egl_display,
-                                     EGLImageKHR egl_image) = 0;
-
-  // Returns the supported texture target for the V4L2Device.
-  virtual GLenum GetTextureTarget() = 0;
-
-  // Returns the preferred V4L2 input format or 0 if don't care.
-  virtual uint32_t PreferredInputFormat() = 0;
-
-  // Get minimum and maximum resolution for fourcc |pixelformat| and store to
-  // |min_resolution| and |max_resolution|.
-  void GetSupportedResolution(uint32_t pixelformat, gfx::Size* min_resolution,
-                              gfx::Size* max_resolution);
-
-  // Return supported profiles for decoder, including only profiles for given
-  // fourcc |pixelformats|.
-  media::VideoDecodeAccelerator::SupportedProfiles GetSupportedDecodeProfiles(
-      const size_t num_formats, const uint32_t pixelformats[]);
-
-  // Return true if the device supports |profile|, taking into account only
-  // fourccs from the given array of |pixelformats| of size |num_formats|.
-  bool SupportsDecodeProfileForV4L2PixelFormats(
-      media::VideoCodecProfile profile,
-      const size_t num_formats,
-      const uint32_t pixelformats[]);
-
- protected:
-  friend class base::RefCountedThreadSafe<V4L2Device>;
-  explicit V4L2Device(Type type);
-  virtual ~V4L2Device();
-
-  const Type type_;
-};
-
-}  //  namespace content
-
-#endif  // CONTENT_COMMON_GPU_MEDIA_V4L2_DEVICE_H_