Renamed v4l2_video_device.*->v4l2_device.* and generic_v4l2_video_device.*->generic_v4l2_device.* a…

content/common/gpu/media/tegra_v4l2_video_device.cc

-// 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.
-
-#include <dlfcn.h>
-#include <fcntl.h>
-#include <linux/videodev2.h>
-
-#include "base/lazy_instance.h"
-#include "base/posix/eintr_wrapper.h"
-#include "base/trace_event/trace_event.h"
-#include "content/common/gpu/media/tegra_v4l2_video_device.h"
-#include "ui/gl/gl_bindings.h"
-
-namespace content {
-
-namespace {
-const char kDecoderDevice[] = "/dev/tegra_avpchannel";
-const char kEncoderDevice[] = "/dev/nvhost-msenc";
-}
-
-typedef int32 (*TegraV4L2Open)(const char* name, int32 flags);
-typedef int32 (*TegraV4L2Close)(int32 fd);
-typedef int32 (*TegraV4L2Ioctl)(int32 fd, unsigned long cmd, ...);
-typedef int32 (*TegraV4L2Poll)(int32 fd, bool poll_device, bool* event_pending);
-typedef int32 (*TegraV4L2SetDevicePollInterrupt)(int32 fd);
-typedef int32 (*TegraV4L2ClearDevicePollInterrupt)(int32 fd);
-typedef void* (*TegraV4L2Mmap)(void* addr,
-                               size_t length,
-                               int prot,
-                               int flags,
-                               int fd,
-                               unsigned int offset);
-typedef int32 (*TegraV4L2Munmap)(void* addr, size_t length);
-typedef int32 (*TegraV4L2UseEglImage)(int fd,
-                                      unsigned int buffer_index,
-                                      void* egl_image);
-
-#define TEGRAV4L2_SYM(name) TegraV4L2##name TegraV4L2_##name = NULL
-
-TEGRAV4L2_SYM(Open);
-TEGRAV4L2_SYM(Close);
-TEGRAV4L2_SYM(Ioctl);
-TEGRAV4L2_SYM(Poll);
-TEGRAV4L2_SYM(SetDevicePollInterrupt);
-TEGRAV4L2_SYM(ClearDevicePollInterrupt);
-TEGRAV4L2_SYM(Mmap);
-TEGRAV4L2_SYM(Munmap);
-TEGRAV4L2_SYM(UseEglImage);
-
-#undef TEGRAV4L2_SYM
-
-class TegraFunctionSymbolFinder {
- public:
-  TegraFunctionSymbolFinder() : initialized_(false) {
-    if (!dlopen("/usr/lib/libtegrav4l2.so",
-                RTLD_NOW | RTLD_GLOBAL | RTLD_NODELETE)) {
-      DLOG(ERROR) << "Failed to load libtegrav4l2.so";
-      return;
-    }
-#define TEGRAV4L2_DLSYM_OR_RETURN_ON_ERROR(name)          \
-  do {                                                    \
-    TegraV4L2_##name = reinterpret_cast<TegraV4L2##name>( \
-        dlsym(RTLD_DEFAULT, "TegraV4L2_" #name));         \
-    if (TegraV4L2_##name == NULL) {                       \
-      LOG(ERROR) << "Failed to dlsym TegraV4L2_" #name;   \
-      return;                                             \
-    }                                                     \
-  } while (0)
-
-    TEGRAV4L2_DLSYM_OR_RETURN_ON_ERROR(Open);
-    TEGRAV4L2_DLSYM_OR_RETURN_ON_ERROR(Close);
-    TEGRAV4L2_DLSYM_OR_RETURN_ON_ERROR(Ioctl);
-    TEGRAV4L2_DLSYM_OR_RETURN_ON_ERROR(Poll);
-    TEGRAV4L2_DLSYM_OR_RETURN_ON_ERROR(SetDevicePollInterrupt);
-    TEGRAV4L2_DLSYM_OR_RETURN_ON_ERROR(ClearDevicePollInterrupt);
-    TEGRAV4L2_DLSYM_OR_RETURN_ON_ERROR(Mmap);
-    TEGRAV4L2_DLSYM_OR_RETURN_ON_ERROR(Munmap);
-    TEGRAV4L2_DLSYM_OR_RETURN_ON_ERROR(UseEglImage);
-#undef TEGRAV4L2_DLSYM
-    initialized_ = true;
-  }
-
-  bool initialized() { return initialized_; }
-
- private:
-  bool initialized_;
-};
-
-base::LazyInstance<TegraFunctionSymbolFinder> g_tegra_function_symbol_finder_ =
-    LAZY_INSTANCE_INITIALIZER;
-
-TegraV4L2Device::TegraV4L2Device(Type type)
-    : type_(type),
-      device_fd_(-1) {
-}
-
-TegraV4L2Device::~TegraV4L2Device() {
-  if (device_fd_ != -1) {
-    TegraV4L2_Close(device_fd_);
-    device_fd_ = -1;
-  }
-}
-
-int TegraV4L2Device::Ioctl(int flags, void* arg) {
-  return HANDLE_EINTR(TegraV4L2_Ioctl(device_fd_, flags, arg));
-}
-
-bool TegraV4L2Device::Poll(bool poll_device, bool* event_pending) {
-  if (HANDLE_EINTR(TegraV4L2_Poll(device_fd_, poll_device, event_pending)) ==
-      -1) {
-    LOG(ERROR) << "TegraV4L2Poll returned -1 ";
-    return false;
-  }
-  return true;
-}
-
-void* TegraV4L2Device::Mmap(void* addr,
-                            unsigned int len,
-                            int prot,
-                            int flags,
-                            unsigned int offset) {
-  return TegraV4L2_Mmap(addr, len, prot, flags, device_fd_, offset);
-}
-
-void TegraV4L2Device::Munmap(void* addr, unsigned int len) {
-  TegraV4L2_Munmap(addr, len);
-}
-
-bool TegraV4L2Device::SetDevicePollInterrupt() {
-  if (HANDLE_EINTR(TegraV4L2_SetDevicePollInterrupt(device_fd_)) == -1) {
-    LOG(ERROR) << "Error in calling TegraV4L2SetDevicePollInterrupt";
-    return false;
-  }
-  return true;
-}
-
-bool TegraV4L2Device::ClearDevicePollInterrupt() {
-  if (HANDLE_EINTR(TegraV4L2_ClearDevicePollInterrupt(device_fd_)) == -1) {
-    LOG(ERROR) << "Error in calling TegraV4L2ClearDevicePollInterrupt";
-    return false;
-  }
-  return true;
-}
-
-bool TegraV4L2Device::Initialize() {
-  const char* device_path = NULL;
-  switch (type_) {
-    case kDecoder:
-      device_path = kDecoderDevice;
-      break;
-    case kEncoder:
-      device_path = kEncoderDevice;
-      break;
-    case kImageProcessor:
-      DVLOG(1) << "Device type " << type_ << " not supported on this platform";
-      return false;
-  }
-
-  if (!g_tegra_function_symbol_finder_.Get().initialized()) {
-    DLOG(ERROR) << "Unable to initialize functions";
-    return false;
-  }
-  device_fd_ = HANDLE_EINTR(
-      TegraV4L2_Open(device_path, O_RDWR | O_NONBLOCK | O_CLOEXEC));
-  if (device_fd_ == -1) {
-    DLOG(ERROR) << "Unable to open device " << device_path;
-    return false;
-  }
-  return true;
-}
-
-bool TegraV4L2Device::CanCreateEGLImageFrom(uint32_t v4l2_pixfmt) {
-  return v4l2_pixfmt == V4L2_PIX_FMT_NV12M;
-}
-
-EGLImageKHR TegraV4L2Device::CreateEGLImage(EGLDisplay egl_display,
-                                            EGLContext egl_context,
-                                            GLuint texture_id,
-                                            gfx::Size /* frame_buffer_size */,
-                                            unsigned int buffer_index,
-                                            uint32_t v4l2_pixfmt,
-                                            size_t /* num_v4l2_planes */) {
-  DVLOG(3) << "CreateEGLImage()";
-  if (!CanCreateEGLImageFrom(v4l2_pixfmt)) {
-    LOG(ERROR) << "Unsupported V4L2 pixel format";
-    return EGL_NO_IMAGE_KHR;
-  }
-
-  EGLint attr = EGL_NONE;
-  EGLImageKHR egl_image =
-      eglCreateImageKHR(egl_display,
-                        egl_context,
-                        EGL_GL_TEXTURE_2D_KHR,
-                        reinterpret_cast<EGLClientBuffer>(texture_id),
-                        &attr);
-  if (egl_image == EGL_NO_IMAGE_KHR) {
-    LOG(ERROR) << "Unable to create EGL image";
-    return egl_image;
-  }
-  if (TegraV4L2_UseEglImage(device_fd_, buffer_index, egl_image) != 0) {
-    LOG(ERROR) << "Unable to use EGL image";
-    eglDestroyImageKHR(egl_display, egl_image);
-    egl_image = EGL_NO_IMAGE_KHR;
-  }
-  return egl_image;
-}
-
-EGLBoolean TegraV4L2Device::DestroyEGLImage(EGLDisplay egl_display,
-                                            EGLImageKHR egl_image) {
-  return eglDestroyImageKHR(egl_display, egl_image);
-}
-
-GLenum TegraV4L2Device::GetTextureTarget() { return GL_TEXTURE_2D; }
-
-uint32 TegraV4L2Device::PreferredInputFormat() {
-  // TODO(posciak): We should support "dontcare" returns here once we
-  // implement proper handling (fallback, negotiation) for this in users.
-  CHECK_EQ(type_, kEncoder);
-  return V4L2_PIX_FMT_YUV420M;
-}
-
-}  //  namespace content