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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.
#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_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)
: V4L2Device(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
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