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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 <fcntl.h>
#include <libdrm/drm_fourcc.h>
#include <linux/videodev2.h>
#include <poll.h>
#include <sys/eventfd.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include "base/debug/trace_event.h"
#include "base/files/scoped_file.h"
#include "base/posix/eintr_wrapper.h"
#include "content/common/gpu/media/exynos_v4l2_video_device.h"
#include "ui/gl/gl_bindings.h"
namespace content {
namespace {
const char kDecoderDevice[] = "/dev/mfc-dec";
const char kEncoderDevice[] = "/dev/mfc-enc";
const char kImageProcessorDevice[] = "/dev/gsc1";
}
ExynosV4L2Device::ExynosV4L2Device(Type type)
: type_(type),
device_fd_(-1),
device_poll_interrupt_fd_(-1) {}
ExynosV4L2Device::~ExynosV4L2Device() {
if (device_poll_interrupt_fd_ != -1) {
close(device_poll_interrupt_fd_);
device_poll_interrupt_fd_ = -1;
}
if (device_fd_ != -1) {
close(device_fd_);
device_fd_ = -1;
}
}
int ExynosV4L2Device::Ioctl(int request, void* arg) {
return HANDLE_EINTR(ioctl(device_fd_, request, arg));
}
bool ExynosV4L2Device::Poll(bool poll_device, bool* event_pending) {
struct pollfd pollfds[2];
nfds_t nfds;
int pollfd = -1;
pollfds[0].fd = device_poll_interrupt_fd_;
pollfds[0].events = POLLIN | POLLERR;
nfds = 1;
if (poll_device) {
DVLOG(3) << "Poll(): adding device fd to poll() set";
pollfds[nfds].fd = device_fd_;
pollfds[nfds].events = POLLIN | POLLOUT | POLLERR | POLLPRI;
pollfd = nfds;
nfds++;
}
if (HANDLE_EINTR(poll(pollfds, nfds, -1)) == -1) {
DPLOG(ERROR) << "poll() failed";
return false;
}
*event_pending = (pollfd != -1 && pollfds[pollfd].revents & POLLPRI);
return true;
}
void* ExynosV4L2Device::Mmap(void* addr,
unsigned int len,
int prot,
int flags,
unsigned int offset) {
return mmap(addr, len, prot, flags, device_fd_, offset);
}
void ExynosV4L2Device::Munmap(void* addr, unsigned int len) {
munmap(addr, len);
}
bool ExynosV4L2Device::SetDevicePollInterrupt() {
DVLOG(3) << "SetDevicePollInterrupt()";
const uint64 buf = 1;
if (HANDLE_EINTR(write(device_poll_interrupt_fd_, &buf, sizeof(buf))) == -1) {
DPLOG(ERROR) << "SetDevicePollInterrupt(): write() failed";
return false;
}
return true;
}
bool ExynosV4L2Device::ClearDevicePollInterrupt() {
DVLOG(3) << "ClearDevicePollInterrupt()";
uint64 buf;
if (HANDLE_EINTR(read(device_poll_interrupt_fd_, &buf, sizeof(buf))) == -1) {
if (errno == EAGAIN) {
// No interrupt flag set, and we're reading nonblocking. Not an error.
return true;
} else {
DPLOG(ERROR) << "ClearDevicePollInterrupt(): read() failed";
return false;
}
}
return true;
}
bool ExynosV4L2Device::Initialize() {
const char* device_path = NULL;
switch (type_) {
case kDecoder:
device_path = kDecoderDevice;
break;
case kEncoder:
device_path = kEncoderDevice;
break;
case kImageProcessor:
device_path = kImageProcessorDevice;
break;
}
DVLOG(2) << "Initialize(): opening device: " << device_path;
// Open the video device.
device_fd_ = HANDLE_EINTR(open(device_path, O_RDWR | O_NONBLOCK | O_CLOEXEC));
if (device_fd_ == -1) {
return false;
}
device_poll_interrupt_fd_ = eventfd(0, EFD_NONBLOCK | EFD_CLOEXEC);
if (device_poll_interrupt_fd_ == -1) {
return false;
}
return true;
}
EGLImageKHR ExynosV4L2Device::CreateEGLImage(EGLDisplay egl_display,
EGLContext /* egl_context */,
GLuint texture_id,
gfx::Size frame_buffer_size,
unsigned int buffer_index,
size_t planes_count) {
DVLOG(3) << "CreateEGLImage()";
scoped_ptr<base::ScopedFD[]> dmabuf_fds(new base::ScopedFD[planes_count]);
for (size_t i = 0; i < planes_count; ++i) {
// Export the DMABUF fd so we can export it as a texture.
struct v4l2_exportbuffer expbuf;
memset(&expbuf, 0, sizeof(expbuf));
expbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
expbuf.index = buffer_index;
expbuf.plane = i;
expbuf.flags = O_CLOEXEC;
if (Ioctl(VIDIOC_EXPBUF, &expbuf) != 0) {
return EGL_NO_IMAGE_KHR;
}
dmabuf_fds[i].reset(expbuf.fd);
}
DCHECK_EQ(planes_count, 2u);
EGLint attrs[] = {
EGL_WIDTH, 0, EGL_HEIGHT, 0,
EGL_LINUX_DRM_FOURCC_EXT, 0, EGL_DMA_BUF_PLANE0_FD_EXT, 0,
EGL_DMA_BUF_PLANE0_OFFSET_EXT, 0, EGL_DMA_BUF_PLANE0_PITCH_EXT, 0,
EGL_DMA_BUF_PLANE1_FD_EXT, 0, EGL_DMA_BUF_PLANE1_OFFSET_EXT, 0,
EGL_DMA_BUF_PLANE1_PITCH_EXT, 0, EGL_NONE, };
attrs[1] = frame_buffer_size.width();
attrs[3] = frame_buffer_size.height();
attrs[5] = DRM_FORMAT_NV12;
attrs[7] = dmabuf_fds[0].get();
attrs[9] = 0;
attrs[11] = frame_buffer_size.width();
attrs[13] = dmabuf_fds[1].get();
attrs[15] = 0;
attrs[17] = frame_buffer_size.width();
EGLImageKHR egl_image = eglCreateImageKHR(
egl_display, EGL_NO_CONTEXT, EGL_LINUX_DMA_BUF_EXT, NULL, attrs);
if (egl_image == EGL_NO_IMAGE_KHR) {
return egl_image;
}
glBindTexture(GL_TEXTURE_EXTERNAL_OES, texture_id);
glEGLImageTargetTexture2DOES(GL_TEXTURE_EXTERNAL_OES, egl_image);
return egl_image;
}
EGLBoolean ExynosV4L2Device::DestroyEGLImage(EGLDisplay egl_display,
EGLImageKHR egl_image) {
return eglDestroyImageKHR(egl_display, egl_image);
}
GLenum ExynosV4L2Device::GetTextureTarget() { return GL_TEXTURE_EXTERNAL_OES; }
uint32 ExynosV4L2Device::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_NV12M;
}
uint32 ExynosV4L2Device::PreferredOutputFormat() {
// TODO(posciak): We should support "dontcare" returns here once we
// implement proper handling (fallback, negotiation) for this in users.
CHECK_EQ(type_, kDecoder);
return V4L2_PIX_FMT_NV12M;
}
} // namespace content
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