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// 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 contains the implementation of GenericV4L2Device used on
// platforms, which provide generic V4L2 video codec devices.
#ifndef MEDIA_GPU_GENERIC_V4L2_DEVICE_H_
#define MEDIA_GPU_GENERIC_V4L2_DEVICE_H_
#include <stddef.h>
#include <stdint.h>
#include <map>
#include "base/files/scoped_file.h"
#include "base/macros.h"
#include "media/gpu/v4l2_device.h"
namespace media {
class GenericV4L2Device : public V4L2Device {
public:
GenericV4L2Device();
// V4L2Device implementation.
bool Open(Type type, uint32_t v4l2_pixfmt) override;
int Ioctl(int request, void* arg) override;
bool Poll(bool poll_device, bool* event_pending) override;
bool SetDevicePollInterrupt() override;
bool ClearDevicePollInterrupt() override;
void* Mmap(void* addr,
unsigned int len,
int prot,
int flags,
unsigned int offset) override;
void Munmap(void* addr, unsigned int len) override;
std::vector<base::ScopedFD> GetDmabufsForV4L2Buffer(
int index,
size_t num_planes,
enum v4l2_buf_type buf_type) override;
bool CanCreateEGLImageFrom(uint32_t v4l2_pixfmt) override;
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) override;
EGLBoolean DestroyEGLImage(EGLDisplay egl_display,
EGLImageKHR egl_image) override;
GLenum GetTextureTarget() override;
uint32_t PreferredInputFormat(Type type) override;
std::vector<uint32_t> GetSupportedImageProcessorPixelformats(
v4l2_buf_type buf_type) override;
VideoDecodeAccelerator::SupportedProfiles GetSupportedDecodeProfiles(
const size_t num_formats,
const uint32_t pixelformats[]) override;
VideoEncodeAccelerator::SupportedProfiles GetSupportedEncodeProfiles()
override;
bool IsImageProcessingSupported() override;
bool IsJpegDecodingSupported() override;
private:
// Vector of video device node paths and corresponding pixelformats supported
// by each device node.
using Devices = std::vector<std::pair<std::string, std::vector<uint32_t>>>;
~GenericV4L2Device() override;
bool Initialize() override;
// Open device node for |path| as a device of |type|.
bool OpenDevicePath(const std::string& path, Type type);
// Close the currently open device.
void CloseDevice();
// Enumerate all V4L2 devices on the system for |type| and store the results
// under devices_by_type_[type].
void EnumerateDevicesForType(V4L2Device::Type type);
// Return device information for all devices of |type| available in the
// system. Enumerates and queries devices on first run and caches the results
// for subsequent calls.
const Devices& GetDevicesForType(V4L2Device::Type type);
// Return device node path for device of |type| supporting |pixfmt|, or
// an empty string if the given combination is not supported by the system.
std::string GetDevicePathFor(V4L2Device::Type type, uint32_t pixfmt);
// Stores information for all devices available on the system
// for each device Type.
std::map<V4L2Device::Type, Devices> devices_by_type_;
// The actual device fd.
base::ScopedFD device_fd_;
// eventfd fd to signal device poll thread when its poll() should be
// interrupted.
base::ScopedFD device_poll_interrupt_fd_;
#if USE_LIBV4L2
// Use libv4l2 when operating |device_fd_|.
bool use_libv4l2_;
#endif
DISALLOW_COPY_AND_ASSIGN(GenericV4L2Device);
// Lazily initialize static data after sandbox is enabled. Return false on
// init failure.
static bool PostSandboxInitialization();
};
} // namespace media
#endif // MEDIA_GPU_GENERIC_V4L2_DEVICE_H_
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