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chromium / chromium / src / fa9bed46c6a5d52e44c8e410b9d52d7ec34d3ddc / . / media / gpu / v4l2 / v4l2_slice_video_decode_accelerator.cc
blob: 42c56eb25df57c6ec99bef615a9f469531f614ca [file] [log] [blame]
// Copyright 2015 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 "media/gpu/v4l2/v4l2_slice_video_decode_accelerator.h"
#include <errno.h>
#include <fcntl.h>
#include <linux/videodev2.h>
#include <poll.h>
#include <string.h>
#include <sys/eventfd.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <memory>
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/callback.h"
#include "base/callback_helpers.h"
#include "base/command_line.h"
#include "base/memory/ptr_util.h"
#include "base/numerics/safe_conversions.h"
#include "base/single_thread_task_runner.h"
#include "base/stl_util.h"
#include "base/strings/stringprintf.h"
#include "base/threading/thread_task_runner_handle.h"
#include "base/time/time.h"
#include "media/base/bind_to_current_loop.h"
#include "media/base/media_switches.h"
#include "media/base/unaligned_shared_memory.h"
#include "media/base/video_types.h"
#include "media/gpu/macros.h"
#include "media/gpu/v4l2/v4l2_decode_surface.h"
#include "media/gpu/v4l2/v4l2_h264_accelerator.h"
#include "media/gpu/v4l2/v4l2_vp8_accelerator.h"
#include "media/gpu/v4l2/v4l2_vp9_accelerator.h"
#include "ui/gl/gl_context.h"
#include "ui/gl/gl_image.h"
#include "ui/gl/scoped_binders.h"
#define NOTIFY_ERROR(x) \
do { \
VLOGF(1) << "Setting error state: " << x; \
SetErrorState(x); \
} while (0)
#define IOCTL_OR_ERROR_RETURN_VALUE(type, arg, value, type_str) \
do { \
if (device_->Ioctl(type, arg) != 0) { \
VPLOGF(1) << "ioctl() failed: " << type_str; \
return value; \
} \
} while (0)
#define IOCTL_OR_ERROR_RETURN(type, arg) \
IOCTL_OR_ERROR_RETURN_VALUE(type, arg, ((void)0), #type)
#define IOCTL_OR_ERROR_RETURN_FALSE(type, arg) \
IOCTL_OR_ERROR_RETURN_VALUE(type, arg, false, #type)
#define IOCTL_OR_LOG_ERROR(type, arg) \
do { \
if (device_->Ioctl(type, arg) != 0) \
VPLOGF(1) << "ioctl() failed: " << #type; \
} while (0)
namespace media {
// static
const uint32_t V4L2SliceVideoDecodeAccelerator::supported_input_fourccs_[] = {
V4L2_PIX_FMT_H264_SLICE, V4L2_PIX_FMT_VP8_FRAME, V4L2_PIX_FMT_VP9_FRAME,
};
V4L2SliceVideoDecodeAccelerator::InputRecord::InputRecord()
: input_id(-1),
address(nullptr),
length(0),
bytes_used(0),
at_device(false) {}
V4L2SliceVideoDecodeAccelerator::OutputRecord::OutputRecord()
: at_device(false),
at_client(false),
num_times_sent_to_client(0),
picture_id(-1),
texture_id(0),
cleared(false) {}
V4L2SliceVideoDecodeAccelerator::OutputRecord::OutputRecord(OutputRecord&&) =
default;
V4L2SliceVideoDecodeAccelerator::OutputRecord::~OutputRecord() = default;
struct V4L2SliceVideoDecodeAccelerator::BitstreamBufferRef {
BitstreamBufferRef(
base::WeakPtr<VideoDecodeAccelerator::Client>& client,
const scoped_refptr<base::SingleThreadTaskRunner>& client_task_runner,
scoped_refptr<DecoderBuffer> buffer,
int32_t input_id);
~BitstreamBufferRef();
const base::WeakPtr<VideoDecodeAccelerator::Client> client;
const scoped_refptr<base::SingleThreadTaskRunner> client_task_runner;
scoped_refptr<DecoderBuffer> buffer;
off_t bytes_used;
const int32_t input_id;
};
V4L2SliceVideoDecodeAccelerator::BitstreamBufferRef::BitstreamBufferRef(
base::WeakPtr<VideoDecodeAccelerator::Client>& client,
const scoped_refptr<base::SingleThreadTaskRunner>& client_task_runner,
scoped_refptr<DecoderBuffer> buffer,
int32_t input_id)
: client(client),
client_task_runner(client_task_runner),
buffer(std::move(buffer)),
bytes_used(0),
input_id(input_id) {}
V4L2SliceVideoDecodeAccelerator::BitstreamBufferRef::~BitstreamBufferRef() {
if (input_id >= 0) {
DVLOGF(5) << "returning input_id: " << input_id;
client_task_runner->PostTask(
FROM_HERE,
base::Bind(&VideoDecodeAccelerator::Client::NotifyEndOfBitstreamBuffer,
client, input_id));
}
}
V4L2SliceVideoDecodeAccelerator::PictureRecord::PictureRecord(
bool cleared,
const Picture& picture)
: cleared(cleared), picture(picture) {}
V4L2SliceVideoDecodeAccelerator::PictureRecord::~PictureRecord() {}
V4L2SliceVideoDecodeAccelerator::V4L2SliceVideoDecodeAccelerator(
const scoped_refptr<V4L2Device>& device,
EGLDisplay egl_display,
const BindGLImageCallback& bind_image_cb,
const MakeGLContextCurrentCallback& make_context_current_cb)
: input_planes_count_(0),
output_planes_count_(0),
child_task_runner_(base::ThreadTaskRunnerHandle::Get()),
device_(device),
decoder_thread_("V4L2SliceVideoDecodeAcceleratorThread"),
device_poll_thread_("V4L2SliceVideoDecodeAcceleratorDevicePollThread"),
input_streamon_(false),
input_buffer_queued_count_(0),
output_streamon_(false),
output_buffer_queued_count_(0),
video_profile_(VIDEO_CODEC_PROFILE_UNKNOWN),
input_format_fourcc_(0),
output_format_fourcc_(0),
state_(kUninitialized),
output_mode_(Config::OutputMode::ALLOCATE),
decoder_flushing_(false),
decoder_resetting_(false),
surface_set_change_pending_(false),
picture_clearing_count_(0),
egl_display_(egl_display),
bind_image_cb_(bind_image_cb),
make_context_current_cb_(make_context_current_cb),
weak_this_factory_(this) {
weak_this_ = weak_this_factory_.GetWeakPtr();
}
V4L2SliceVideoDecodeAccelerator::~V4L2SliceVideoDecodeAccelerator() {
DVLOGF(2);
DCHECK(child_task_runner_->BelongsToCurrentThread());
DCHECK(!decoder_thread_.IsRunning());
DCHECK(!device_poll_thread_.IsRunning());
DCHECK(input_buffer_map_.empty());
DCHECK(output_buffer_map_.empty());
}
void V4L2SliceVideoDecodeAccelerator::NotifyError(Error error) {
// Notifying the client should only happen from the client's thread.
if (!child_task_runner_->BelongsToCurrentThread()) {
child_task_runner_->PostTask(
FROM_HERE, base::BindOnce(&V4L2SliceVideoDecodeAccelerator::NotifyError,
weak_this_, error));
return;
}
// Notify the decoder's client an error has occurred.
if (client_) {
client_->NotifyError(error);
client_ptr_factory_.reset();
}
}
bool V4L2SliceVideoDecodeAccelerator::Initialize(const Config& config,
Client* client) {
VLOGF(2) << "profile: " << config.profile;
DCHECK(child_task_runner_->BelongsToCurrentThread());
DCHECK_EQ(state_, kUninitialized);
if (config.is_encrypted()) {
NOTREACHED() << "Encrypted streams are not supported for this VDA";
return false;
}
if (config.output_mode != Config::OutputMode::ALLOCATE &&
config.output_mode != Config::OutputMode::IMPORT) {
NOTREACHED() << "Only ALLOCATE and IMPORT OutputModes are supported";
return false;
}
client_ptr_factory_.reset(
new base::WeakPtrFactory<VideoDecodeAccelerator::Client>(client));
client_ = client_ptr_factory_->GetWeakPtr();
// If we haven't been set up to decode on separate thread via
// TryToSetupDecodeOnSeparateThread(), use the main thread/client for
// decode tasks.
if (!decode_task_runner_) {
decode_task_runner_ = child_task_runner_;
DCHECK(!decode_client_);
decode_client_ = client_;
}
// We need the context to be initialized to query extensions.
if (make_context_current_cb_) {
if (egl_display_ == EGL_NO_DISPLAY) {
VLOGF(1) << "could not get EGLDisplay";
return false;
}
if (!make_context_current_cb_.Run()) {
VLOGF(1) << "could not make context current";
return false;
}
if (!gl::g_driver_egl.ext.b_EGL_KHR_fence_sync) {
VLOGF(1) << "context does not have EGL_KHR_fence_sync";
return false;
}
} else {
DVLOGF(2) << "No GL callbacks provided, initializing without GL support";
}
video_profile_ = config.profile;
// TODO(posciak): This needs to be queried once supported.
input_planes_count_ = 1;
output_planes_count_ = 1;
input_format_fourcc_ =
V4L2Device::VideoCodecProfileToV4L2PixFmt(video_profile_, true);
if (!device_->Open(V4L2Device::Type::kDecoder, input_format_fourcc_)) {
VLOGF(1) << "Failed to open device for profile: " << config.profile
<< " fourcc: " << FourccToString(input_format_fourcc_);
return false;
}
if (video_profile_ >= H264PROFILE_MIN && video_profile_ <= H264PROFILE_MAX) {
decoder_.reset(new H264Decoder(
std::make_unique<V4L2H264Accelerator>(this, device_.get())));
} else if (video_profile_ >= VP8PROFILE_MIN &&
video_profile_ <= VP8PROFILE_MAX) {
decoder_.reset(new VP8Decoder(
std::make_unique<V4L2VP8Accelerator>(this, device_.get())));
} else if (video_profile_ >= VP9PROFILE_MIN &&
video_profile_ <= VP9PROFILE_MAX) {
decoder_.reset(new VP9Decoder(
std::make_unique<V4L2VP9Accelerator>(this, device_.get())));
} else {
NOTREACHED() << "Unsupported profile " << GetProfileName(video_profile_);
return false;
}
// Capabilities check.
struct v4l2_capability caps;
const __u32 kCapsRequired = V4L2_CAP_VIDEO_M2M_MPLANE | V4L2_CAP_STREAMING;
IOCTL_OR_ERROR_RETURN_FALSE(VIDIOC_QUERYCAP, &caps);
if ((caps.capabilities & kCapsRequired) != kCapsRequired) {
VLOGF(1) << "ioctl() failed: VIDIOC_QUERYCAP"
<< ", caps check failed: 0x" << std::hex << caps.capabilities;
return false;
}
if (!SetupFormats())
return false;
if (!decoder_thread_.Start()) {
VLOGF(1) << "device thread failed to start";
return false;
}
decoder_thread_task_runner_ = decoder_thread_.task_runner();
state_ = kInitialized;
output_mode_ = config.output_mode;
// InitializeTask will NOTIFY_ERROR on failure.
decoder_thread_task_runner_->PostTask(
FROM_HERE,
base::BindOnce(&V4L2SliceVideoDecodeAccelerator::InitializeTask,
base::Unretained(this)));
VLOGF(2) << "V4L2SliceVideoDecodeAccelerator initialized";
return true;
}
void V4L2SliceVideoDecodeAccelerator::InitializeTask() {
VLOGF(2);
DCHECK(decoder_thread_task_runner_->BelongsToCurrentThread());
DCHECK_EQ(state_, kInitialized);
if (IsDestroyPending())
return;
if (!CreateInputBuffers())
NOTIFY_ERROR(PLATFORM_FAILURE);
// Output buffers will be created once decoder gives us information
// about their size and required count.
state_ = kDecoding;
}
void V4L2SliceVideoDecodeAccelerator::Destroy() {
VLOGF(2);
DCHECK(child_task_runner_->BelongsToCurrentThread());
// Signal any waiting/sleeping tasks to early exit as soon as possible to
// avoid waiting too long for the decoder_thread_ to Stop().
destroy_pending_.Signal();
if (decoder_thread_.IsRunning()) {
decoder_thread_task_runner_->PostTask(
FROM_HERE, base::BindOnce(&V4L2SliceVideoDecodeAccelerator::DestroyTask,
base::Unretained(this)));
// Wait for tasks to finish/early-exit.
decoder_thread_.Stop();
}
delete this;
VLOGF(2) << "Destroyed";
}
void V4L2SliceVideoDecodeAccelerator::DestroyTask() {
DVLOGF(2);
DCHECK(decoder_thread_task_runner_->BelongsToCurrentThread());
state_ = kDestroying;
decoder_->Reset();
decoder_current_bitstream_buffer_.reset();
while (!decoder_input_queue_.empty())
decoder_input_queue_.pop();
// Stop streaming and the device_poll_thread_.
StopDevicePoll(false);
DestroyInputBuffers();
DestroyOutputs(false);
DCHECK(surfaces_at_device_.empty());
DCHECK(surfaces_at_display_.empty());
DCHECK(decoder_display_queue_.empty());
}
bool V4L2SliceVideoDecodeAccelerator::SetupFormats() {
DCHECK_EQ(state_, kUninitialized);
size_t input_size;
gfx::Size max_resolution, min_resolution;
device_->GetSupportedResolution(input_format_fourcc_, &min_resolution,
&max_resolution);
if (max_resolution.width() > 1920 && max_resolution.height() > 1088)
input_size = kInputBufferMaxSizeFor4k;
else
input_size = kInputBufferMaxSizeFor1080p;
struct v4l2_fmtdesc fmtdesc;
memset(&fmtdesc, 0, sizeof(fmtdesc));
fmtdesc.type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
bool is_format_supported = false;
while (device_->Ioctl(VIDIOC_ENUM_FMT, &fmtdesc) == 0) {
if (fmtdesc.pixelformat == input_format_fourcc_) {
is_format_supported = true;
break;
}
++fmtdesc.index;
}
if (!is_format_supported) {
DVLOGF(1) << "Input fourcc " << input_format_fourcc_
<< " not supported by device.";
return false;
}
struct v4l2_format format;
memset(&format, 0, sizeof(format));
format.type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
format.fmt.pix_mp.pixelformat = input_format_fourcc_;
format.fmt.pix_mp.plane_fmt[0].sizeimage = input_size;
format.fmt.pix_mp.num_planes = input_planes_count_;
IOCTL_OR_ERROR_RETURN_FALSE(VIDIOC_S_FMT, &format);
DCHECK_EQ(format.fmt.pix_mp.pixelformat, input_format_fourcc_);
// We have to set up the format for output, because the driver may not allow
// changing it once we start streaming; whether it can support our chosen
// output format or not may depend on the input format.
memset(&fmtdesc, 0, sizeof(fmtdesc));
fmtdesc.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
output_format_fourcc_ = 0;
while (device_->Ioctl(VIDIOC_ENUM_FMT, &fmtdesc) == 0) {
if (device_->CanCreateEGLImageFrom(fmtdesc.pixelformat)) {
output_format_fourcc_ = fmtdesc.pixelformat;
break;
}
++fmtdesc.index;
}
if (output_format_fourcc_ == 0) {
VLOGF(1) << "Could not find a usable output format";
return false;
}
// Only set fourcc for output; resolution, etc., will come from the
// driver once it extracts it from the stream.
memset(&format, 0, sizeof(format));
format.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
format.fmt.pix_mp.pixelformat = output_format_fourcc_;
format.fmt.pix_mp.num_planes = output_planes_count_;
IOCTL_OR_ERROR_RETURN_FALSE(VIDIOC_S_FMT, &format);
DCHECK_EQ(format.fmt.pix_mp.pixelformat, output_format_fourcc_);
return true;
}
bool V4L2SliceVideoDecodeAccelerator::CreateInputBuffers() {
VLOGF(2);
DCHECK(decoder_thread_task_runner_->BelongsToCurrentThread());
DCHECK(!input_streamon_);
DCHECK(input_buffer_map_.empty());
struct v4l2_requestbuffers reqbufs;
memset(&reqbufs, 0, sizeof(reqbufs));
reqbufs.count = kNumInputBuffers;
reqbufs.type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
reqbufs.memory = V4L2_MEMORY_MMAP;
IOCTL_OR_ERROR_RETURN_FALSE(VIDIOC_REQBUFS, &reqbufs);
if (reqbufs.count < kNumInputBuffers) {
VLOGF(1) << "Could not allocate enough output buffers";
return false;
}
input_buffer_map_.resize(reqbufs.count);
for (size_t i = 0; i < input_buffer_map_.size(); ++i) {
free_input_buffers_.push_back(i);
// Query for the MEMORY_MMAP pointer.
struct v4l2_plane planes[VIDEO_MAX_PLANES];
struct v4l2_buffer buffer;
memset(&buffer, 0, sizeof(buffer));
memset(planes, 0, sizeof(planes));
buffer.index = i;
buffer.type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
buffer.memory = V4L2_MEMORY_MMAP;
buffer.m.planes = planes;
buffer.length = input_planes_count_;
IOCTL_OR_ERROR_RETURN_FALSE(VIDIOC_QUERYBUF, &buffer);
void* address = device_->Mmap(nullptr,
buffer.m.planes[0].length,
PROT_READ | PROT_WRITE,
MAP_SHARED,
buffer.m.planes[0].m.mem_offset);
if (address == MAP_FAILED) {
VPLOGF(1) << "mmap() failed";
return false;
}
input_buffer_map_[i].address = address;
input_buffer_map_[i].length = buffer.m.planes[0].length;
}
return true;
}
bool V4L2SliceVideoDecodeAccelerator::CreateOutputBuffers() {
VLOGF(2);
DCHECK(decoder_thread_task_runner_->BelongsToCurrentThread());
DCHECK(!output_streamon_);
DCHECK(output_buffer_map_.empty());
DCHECK(surfaces_at_display_.empty());
DCHECK(surfaces_at_device_.empty());
gfx::Size pic_size = decoder_->GetPicSize();
size_t num_pictures = decoder_->GetRequiredNumOfPictures();
DCHECK_GT(num_pictures, 0u);
DCHECK(!pic_size.IsEmpty());
struct v4l2_format format;
memset(&format, 0, sizeof(format));
format.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
format.fmt.pix_mp.pixelformat = output_format_fourcc_;
format.fmt.pix_mp.width = pic_size.width();
format.fmt.pix_mp.height = pic_size.height();
format.fmt.pix_mp.num_planes = output_planes_count_;
if (device_->Ioctl(VIDIOC_S_FMT, &format) != 0) {
VPLOGF(1) << "Failed setting format to: " << output_format_fourcc_;
NOTIFY_ERROR(PLATFORM_FAILURE);
return false;
}
coded_size_.SetSize(base::checked_cast<int>(format.fmt.pix_mp.width),
base::checked_cast<int>(format.fmt.pix_mp.height));
DCHECK_EQ(coded_size_.width() % 16, 0);
DCHECK_EQ(coded_size_.height() % 16, 0);
if (!gfx::Rect(coded_size_).Contains(gfx::Rect(pic_size))) {
VLOGF(1) << "Got invalid adjusted coded size: " << coded_size_.ToString();
return false;
}
DVLOGF(3) << "buffer_count=" << num_pictures
<< ", pic size=" << pic_size.ToString()
<< ", coded size=" << coded_size_.ToString();
VideoPixelFormat pixel_format =
V4L2Device::V4L2PixFmtToVideoPixelFormat(output_format_fourcc_);
child_task_runner_->PostTask(
FROM_HERE,
base::Bind(&VideoDecodeAccelerator::Client::ProvidePictureBuffers,
client_, num_pictures, pixel_format, 1, coded_size_,
device_->GetTextureTarget()));
// Go into kAwaitingPictureBuffers to prevent us from doing any more decoding
// or event handling while we are waiting for AssignPictureBuffers(). Not
// having Pictures available would not have prevented us from making decoding
// progress entirely e.g. in the case of H.264 where we could further decode
// non-slice NALUs and could even get another resolution change before we were
// done with this one. After we get the buffers, we'll go back into kIdle and
// kick off further event processing, and eventually go back into kDecoding
// once no more events are pending (if any).
state_ = kAwaitingPictureBuffers;
return true;
}
void V4L2SliceVideoDecodeAccelerator::DestroyInputBuffers() {
VLOGF(2);
DCHECK(decoder_thread_task_runner_->BelongsToCurrentThread() ||
!decoder_thread_.IsRunning());
DCHECK(!input_streamon_);
if (input_buffer_map_.empty())
return;
for (auto& input_record : input_buffer_map_) {
if (input_record.address != nullptr)
device_->Munmap(input_record.address, input_record.length);
}
struct v4l2_requestbuffers reqbufs;
memset(&reqbufs, 0, sizeof(reqbufs));
reqbufs.count = 0;
reqbufs.type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
reqbufs.memory = V4L2_MEMORY_MMAP;
IOCTL_OR_LOG_ERROR(VIDIOC_REQBUFS, &reqbufs);
input_buffer_map_.clear();
free_input_buffers_.clear();
}
void V4L2SliceVideoDecodeAccelerator::DismissPictures(
const std::vector<int32_t>& picture_buffer_ids,
base::WaitableEvent* done) {
DVLOGF(3);
DCHECK(child_task_runner_->BelongsToCurrentThread());
for (auto picture_buffer_id : picture_buffer_ids) {
DVLOGF(4) << "dismissing PictureBuffer id=" << picture_buffer_id;
client_->DismissPictureBuffer(picture_buffer_id);
}
done->Signal();
}
void V4L2SliceVideoDecodeAccelerator::DevicePollTask(bool poll_device) {
DVLOGF(3);
DCHECK(device_poll_thread_.task_runner()->BelongsToCurrentThread());
bool event_pending;
if (!device_->Poll(poll_device, &event_pending)) {
NOTIFY_ERROR(PLATFORM_FAILURE);
return;
}
// All processing should happen on ServiceDeviceTask(), since we shouldn't
// touch encoder state from this thread.
decoder_thread_task_runner_->PostTask(
FROM_HERE,
base::BindOnce(&V4L2SliceVideoDecodeAccelerator::ServiceDeviceTask,
base::Unretained(this)));
}
void V4L2SliceVideoDecodeAccelerator::ServiceDeviceTask() {
DVLOGF(4);
DCHECK(decoder_thread_task_runner_->BelongsToCurrentThread());
if (IsDestroyPending())
return;
// ServiceDeviceTask() should only ever be scheduled from DevicePollTask().
Dequeue();
SchedulePollIfNeeded();
}
void V4L2SliceVideoDecodeAccelerator::SchedulePollIfNeeded() {
DCHECK(decoder_thread_task_runner_->BelongsToCurrentThread());
if (!device_poll_thread_.IsRunning()) {
DVLOGF(4) << "Device poll thread stopped, will not schedule poll";
return;
}
DCHECK(input_streamon_ || output_streamon_);
if (input_buffer_queued_count_ + output_buffer_queued_count_ == 0) {
DVLOGF(4) << "No buffers queued, will not schedule poll";
return;
}
DVLOGF(4) << "Scheduling device poll task";
device_poll_thread_.task_runner()->PostTask(
FROM_HERE,
base::BindOnce(&V4L2SliceVideoDecodeAccelerator::DevicePollTask,
base::Unretained(this), true));
DVLOGF(3) << "buffer counts: "
<< "INPUT[" << decoder_input_queue_.size() << "]"
<< " => DEVICE["
<< free_input_buffers_.size() << "+"
<< input_buffer_queued_count_ << "/"
<< input_buffer_map_.size() << "]->["
<< free_output_buffers_.size() << "+"
<< output_buffer_queued_count_ << "/"
<< output_buffer_map_.size() << "]"
<< " => DISPLAYQ[" << decoder_display_queue_.size() << "]"
<< " => CLIENT[" << surfaces_at_display_.size() << "]";
}
void V4L2SliceVideoDecodeAccelerator::Enqueue(
const scoped_refptr<V4L2DecodeSurface>& dec_surface) {
DCHECK(decoder_thread_task_runner_->BelongsToCurrentThread());
const int old_inputs_queued = input_buffer_queued_count_;
const int old_outputs_queued = output_buffer_queued_count_;
if (!EnqueueInputRecord(dec_surface->input_record(),
dec_surface->config_store())) {
VLOGF(1) << "Failed queueing an input buffer";
NOTIFY_ERROR(PLATFORM_FAILURE);
return;
}
if (!EnqueueOutputRecord(dec_surface->output_record())) {
VLOGF(1) << "Failed queueing an output buffer";
NOTIFY_ERROR(PLATFORM_FAILURE);
return;
}
bool inserted =
surfaces_at_device_
.insert(std::make_pair(dec_surface->output_record(), dec_surface))
.second;
DCHECK(inserted);
if (old_inputs_queued == 0 && old_outputs_queued == 0)
SchedulePollIfNeeded();
}
void V4L2SliceVideoDecodeAccelerator::Dequeue() {
DVLOGF(4);
DCHECK(decoder_thread_task_runner_->BelongsToCurrentThread());
struct v4l2_buffer dqbuf;
struct v4l2_plane planes[VIDEO_MAX_PLANES];
while (input_buffer_queued_count_ > 0) {
DCHECK(input_streamon_);
memset(&dqbuf, 0, sizeof(dqbuf));
memset(&planes, 0, sizeof(planes));
dqbuf.type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
dqbuf.memory = V4L2_MEMORY_MMAP;
dqbuf.m.planes = planes;
dqbuf.length = input_planes_count_;
if (device_->Ioctl(VIDIOC_DQBUF, &dqbuf) != 0) {
if (errno == EAGAIN) {
// EAGAIN if we're just out of buffers to dequeue.
break;
}
VPLOGF(1) << "ioctl() failed: VIDIOC_DQBUF";
NOTIFY_ERROR(PLATFORM_FAILURE);
return;
}
InputRecord& input_record = input_buffer_map_[dqbuf.index];
DCHECK(input_record.at_device);
input_record.at_device = false;
ReuseInputBuffer(dqbuf.index);
input_buffer_queued_count_--;
DVLOGF(4) << "Dequeued input=" << dqbuf.index
<< " count: " << input_buffer_queued_count_;
}
while (output_buffer_queued_count_ > 0) {
DCHECK(output_streamon_);
memset(&dqbuf, 0, sizeof(dqbuf));
memset(&planes, 0, sizeof(planes));
dqbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
dqbuf.memory =
(output_mode_ == Config::OutputMode::ALLOCATE ? V4L2_MEMORY_MMAP
: V4L2_MEMORY_DMABUF);
dqbuf.m.planes = planes;
dqbuf.length = output_planes_count_;
if (device_->Ioctl(VIDIOC_DQBUF, &dqbuf) != 0) {
if (errno == EAGAIN) {
// EAGAIN if we're just out of buffers to dequeue.
break;
}
VPLOGF(1) << "ioctl() failed: VIDIOC_DQBUF";
NOTIFY_ERROR(PLATFORM_FAILURE);
return;
}
OutputRecord& output_record = output_buffer_map_[dqbuf.index];
DCHECK(output_record.at_device);
output_record.at_device = false;
output_buffer_queued_count_--;
DVLOGF(4) << "Dequeued output=" << dqbuf.index << " count "
<< output_buffer_queued_count_;
V4L2DecodeSurfaceByOutputId::iterator it =
surfaces_at_device_.find(dqbuf.index);
if (it == surfaces_at_device_.end()) {
VLOGF(1) << "Got invalid surface from device.";
NOTIFY_ERROR(PLATFORM_FAILURE);
return;
}
it->second->SetDecoded();
surfaces_at_device_.erase(it);
}
// A frame was decoded, see if we can output it.
TryOutputSurfaces();
ProcessPendingEventsIfNeeded();
ScheduleDecodeBufferTaskIfNeeded();
}
void V4L2SliceVideoDecodeAccelerator::NewEventPending() {
// Switch to event processing mode if we are decoding. Otherwise we are either
// already in it, or we will potentially switch to it later, after finishing
// other tasks.
if (state_ == kDecoding)
state_ = kIdle;
ProcessPendingEventsIfNeeded();
}
bool V4L2SliceVideoDecodeAccelerator::FinishEventProcessing() {
DCHECK_EQ(state_, kIdle);
state_ = kDecoding;
ScheduleDecodeBufferTaskIfNeeded();
return true;
}
void V4L2SliceVideoDecodeAccelerator::ProcessPendingEventsIfNeeded() {
DCHECK(decoder_thread_task_runner_->BelongsToCurrentThread());
// Process pending events, if any, in the correct order.
// We always first process the surface set change, as it is an internal
// event from the decoder and interleaving it with external requests would
// put the decoder in an undefined state.
using ProcessFunc = bool (V4L2SliceVideoDecodeAccelerator::*)();
const ProcessFunc process_functions[] = {
&V4L2SliceVideoDecodeAccelerator::FinishSurfaceSetChange,
&V4L2SliceVideoDecodeAccelerator::FinishFlush,
&V4L2SliceVideoDecodeAccelerator::FinishReset,
&V4L2SliceVideoDecodeAccelerator::FinishEventProcessing,
};
for (const auto& fn : process_functions) {
if (state_ != kIdle)
return;
if (!(this->*fn)())
return;
}
}
void V4L2SliceVideoDecodeAccelerator::ReuseInputBuffer(int index) {
DVLOGF(4) << "Reusing input buffer, index=" << index;
DCHECK(decoder_thread_task_runner_->BelongsToCurrentThread());
DCHECK_LT(index, static_cast<int>(input_buffer_map_.size()));
InputRecord& input_record = input_buffer_map_[index];
DCHECK(!input_record.at_device);
input_record.input_id = -1;
input_record.bytes_used = 0;
DCHECK_EQ(
std::count(free_input_buffers_.begin(), free_input_buffers_.end(), index),
0);
free_input_buffers_.push_back(index);
}
void V4L2SliceVideoDecodeAccelerator::ReuseOutputBuffer(int index) {
DVLOGF(4) << "Reusing output buffer, index=" << index;
DCHECK(decoder_thread_task_runner_->BelongsToCurrentThread());
DCHECK_LT(index, static_cast<int>(output_buffer_map_.size()));
OutputRecord& output_record = output_buffer_map_[index];
DCHECK(!output_record.at_device);
DCHECK(!output_record.at_client);
DCHECK_EQ(std::count(free_output_buffers_.begin(), free_output_buffers_.end(),
index),
0);
free_output_buffers_.push_back(index);
ScheduleDecodeBufferTaskIfNeeded();
}
bool V4L2SliceVideoDecodeAccelerator::EnqueueInputRecord(
int index,
uint32_t config_store) {
DVLOGF(4);
DCHECK_LT(index, static_cast<int>(input_buffer_map_.size()));
DCHECK_GT(config_store, 0u);
// Enqueue an input (VIDEO_OUTPUT) buffer for an input video frame.
InputRecord& input_record = input_buffer_map_[index];
DCHECK(!input_record.at_device);
struct v4l2_buffer qbuf;
struct v4l2_plane qbuf_planes[VIDEO_MAX_PLANES];
memset(&qbuf, 0, sizeof(qbuf));
memset(qbuf_planes, 0, sizeof(qbuf_planes));
qbuf.index = index;
qbuf.type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
qbuf.memory = V4L2_MEMORY_MMAP;
qbuf.m.planes = qbuf_planes;
qbuf.m.planes[0].bytesused = input_record.bytes_used;
qbuf.length = input_planes_count_;
qbuf.config_store = config_store;
IOCTL_OR_ERROR_RETURN_FALSE(VIDIOC_QBUF, &qbuf);
input_record.at_device = true;
input_buffer_queued_count_++;
DVLOGF(4) << "Enqueued input=" << qbuf.index
<< " count: " << input_buffer_queued_count_;
return true;
}
bool V4L2SliceVideoDecodeAccelerator::EnqueueOutputRecord(int index) {
DVLOGF(4);
DCHECK_LT(index, static_cast<int>(output_buffer_map_.size()));
// Enqueue an output (VIDEO_CAPTURE) buffer.
OutputRecord& output_record = output_buffer_map_[index];
DCHECK(!output_record.at_device);
DCHECK(!output_record.at_client);
DCHECK_NE(output_record.picture_id, -1);
if (output_record.egl_fence) {
// If we have to wait for completion, wait. Note that free_output_buffers_
// is a FIFO queue, so we always wait on the buffer that has been in the
// queue the longest. Every 100ms we check whether the decoder is shutting
// down, or we might get stuck waiting on a fence that will never come:
// https://crbug.com/845645
while (!IsDestroyPending()) {
const EGLTimeKHR wait_ns =
base::TimeDelta::FromMilliseconds(100).InNanoseconds();
EGLint result =
output_record.egl_fence->ClientWaitWithTimeoutNanos(wait_ns);
if (result == EGL_CONDITION_SATISFIED_KHR) {
break;
} else if (result == EGL_FALSE) {
// This will cause tearing, but is safe otherwise.
DVLOGF(1) << "GLFenceEGL::ClientWaitWithTimeoutNanos failed!";
break;
}
DCHECK_EQ(result, EGL_TIMEOUT_EXPIRED_KHR);
}
if (IsDestroyPending())
return false;
output_record.egl_fence.reset();
}
struct v4l2_buffer qbuf;
struct v4l2_plane qbuf_planes[VIDEO_MAX_PLANES];
memset(&qbuf, 0, sizeof(qbuf));
memset(qbuf_planes, 0, sizeof(qbuf_planes));
qbuf.index = index;
qbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
if (output_mode_ == Config::OutputMode::ALLOCATE) {
qbuf.memory = V4L2_MEMORY_MMAP;
} else {
qbuf.memory = V4L2_MEMORY_DMABUF;
DCHECK_EQ(output_planes_count_, output_record.dmabuf_fds.size());
for (size_t i = 0; i < output_record.dmabuf_fds.size(); ++i) {
DCHECK(output_record.dmabuf_fds[i].is_valid());
qbuf_planes[i].m.fd = output_record.dmabuf_fds[i].get();
}
}
qbuf.m.planes = qbuf_planes;
qbuf.length = output_planes_count_;
IOCTL_OR_ERROR_RETURN_FALSE(VIDIOC_QBUF, &qbuf);
output_record.at_device = true;
output_buffer_queued_count_++;
DVLOGF(4) << "Enqueued output=" << qbuf.index
<< " count: " << output_buffer_queued_count_;
return true;
}
bool V4L2SliceVideoDecodeAccelerator::StartDevicePoll() {
DVLOGF(3) << "Starting device poll";
DCHECK(decoder_thread_task_runner_->BelongsToCurrentThread());
DCHECK(!device_poll_thread_.IsRunning());
// Start up the device poll thread and schedule its first DevicePollTask().
if (!device_poll_thread_.Start()) {
VLOGF(1) << "Device thread failed to start";
NOTIFY_ERROR(PLATFORM_FAILURE);
return false;
}
if (!input_streamon_) {
__u32 type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
IOCTL_OR_ERROR_RETURN_FALSE(VIDIOC_STREAMON, &type);
input_streamon_ = true;
}
if (!output_streamon_) {
__u32 type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
IOCTL_OR_ERROR_RETURN_FALSE(VIDIOC_STREAMON, &type);
output_streamon_ = true;
}
device_poll_thread_.task_runner()->PostTask(
FROM_HERE,
base::BindOnce(&V4L2SliceVideoDecodeAccelerator::DevicePollTask,
base::Unretained(this), true));
return true;
}
bool V4L2SliceVideoDecodeAccelerator::StopDevicePoll(bool keep_input_state) {
DVLOGF(3) << "Stopping device poll";
if (decoder_thread_.IsRunning())
DCHECK(decoder_thread_task_runner_->BelongsToCurrentThread());
// Signal the DevicePollTask() to stop, and stop the device poll thread.
if (!device_->SetDevicePollInterrupt()) {
VPLOGF(1) << "SetDevicePollInterrupt(): failed";
NOTIFY_ERROR(PLATFORM_FAILURE);
return false;
}
device_poll_thread_.Stop();
DVLOGF(3) << "Device poll thread stopped";
// Clear the interrupt now, to be sure.
if (!device_->ClearDevicePollInterrupt()) {
NOTIFY_ERROR(PLATFORM_FAILURE);
return false;
}
if (!keep_input_state) {
if (input_streamon_) {
__u32 type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
IOCTL_OR_ERROR_RETURN_FALSE(VIDIOC_STREAMOFF, &type);
}
input_streamon_ = false;
}
if (output_streamon_) {
__u32 type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
IOCTL_OR_ERROR_RETURN_FALSE(VIDIOC_STREAMOFF, &type);
}
output_streamon_ = false;
if (!keep_input_state) {
for (size_t i = 0; i < input_buffer_map_.size(); ++i) {
InputRecord& input_record = input_buffer_map_[i];
if (input_record.at_device) {
input_record.at_device = false;
ReuseInputBuffer(i);
input_buffer_queued_count_--;
}
}
DCHECK_EQ(input_buffer_queued_count_, 0);
}
// STREAMOFF makes the driver drop all buffers without decoding and DQBUFing,
// so we mark them all as at_device = false and clear surfaces_at_device_.
for (size_t i = 0; i < output_buffer_map_.size(); ++i) {
OutputRecord& output_record = output_buffer_map_[i];
if (output_record.at_device) {
output_record.at_device = false;
output_buffer_queued_count_--;
}
}
// Mark as decoded to allow reuse.
for (auto kv : surfaces_at_device_) {
kv.second->SetDecoded();
}
surfaces_at_device_.clear();
DCHECK_EQ(output_buffer_queued_count_, 0);
// Drop all surfaces that were awaiting decode before being displayed,
// since we've just cancelled all outstanding decodes.
while (!decoder_display_queue_.empty())
decoder_display_queue_.pop();
DVLOGF(3) << "Device poll stopped";
return true;
}
void V4L2SliceVideoDecodeAccelerator::Decode(
const BitstreamBuffer& bitstream_buffer) {
Decode(bitstream_buffer.ToDecoderBuffer(), bitstream_buffer.id());
}
void V4L2SliceVideoDecodeAccelerator::Decode(
scoped_refptr<DecoderBuffer> buffer,
int32_t bitstream_id) {
DVLOGF(4) << "input_id=" << bitstream_id
<< ", size=" << (buffer ? buffer->data_size() : 0);
DCHECK(decode_task_runner_->BelongsToCurrentThread());
if (bitstream_id < 0) {
VLOGF(1) << "Invalid bitstream buffer, id: " << bitstream_id;
NOTIFY_ERROR(INVALID_ARGUMENT);
return;
}
decoder_thread_task_runner_->PostTask(
FROM_HERE,
base::BindOnce(&V4L2SliceVideoDecodeAccelerator::DecodeTask,
base::Unretained(this), std::move(buffer), bitstream_id));
}
void V4L2SliceVideoDecodeAccelerator::DecodeTask(
scoped_refptr<DecoderBuffer> buffer,
int32_t bitstream_id) {
DVLOGF(4) << "input_id=" << bitstream_id
<< " size=" << (buffer ? buffer->data_size() : 0);
DCHECK(decoder_thread_task_runner_->BelongsToCurrentThread());
if (IsDestroyPending())
return;
std::unique_ptr<BitstreamBufferRef> bitstream_record(new BitstreamBufferRef(
decode_client_, decode_task_runner_, std::move(buffer), bitstream_id));
// Skip empty buffer.
if (!bitstream_record->buffer)
return;
decoder_input_queue_.push(std::move(bitstream_record));
ScheduleDecodeBufferTaskIfNeeded();
}
bool V4L2SliceVideoDecodeAccelerator::TrySetNewBistreamBuffer() {
DCHECK(decoder_thread_task_runner_->BelongsToCurrentThread());
DCHECK(!decoder_current_bitstream_buffer_);
if (decoder_input_queue_.empty())
return false;
decoder_current_bitstream_buffer_ = std::move(decoder_input_queue_.front());
decoder_input_queue_.pop();
if (decoder_current_bitstream_buffer_->input_id == kFlushBufferId) {
// This is a buffer we queued for ourselves to trigger flush at this time.
InitiateFlush();
return false;
}
const uint8_t* const data = decoder_current_bitstream_buffer_->buffer->data();
const size_t data_size =
decoder_current_bitstream_buffer_->buffer->data_size();
decoder_->SetStream(decoder_current_bitstream_buffer_->input_id, data,
data_size);
return true;
}
void V4L2SliceVideoDecodeAccelerator::ScheduleDecodeBufferTaskIfNeeded() {
DCHECK(decoder_thread_task_runner_->BelongsToCurrentThread());
if (state_ == kDecoding) {
decoder_thread_task_runner_->PostTask(
FROM_HERE,
base::Bind(&V4L2SliceVideoDecodeAccelerator::DecodeBufferTask,
base::Unretained(this)));
}
}
void V4L2SliceVideoDecodeAccelerator::DecodeBufferTask() {
DVLOGF(4);
DCHECK(decoder_thread_task_runner_->BelongsToCurrentThread());
if (IsDestroyPending())
return;
if (state_ != kDecoding) {
DVLOGF(3) << "Early exit, not in kDecoding";
return;
}
while (true) {
AcceleratedVideoDecoder::DecodeResult res;
res = decoder_->Decode();
switch (res) {
case AcceleratedVideoDecoder::kAllocateNewSurfaces:
VLOGF(2) << "Decoder requesting a new set of surfaces";
InitiateSurfaceSetChange();
return;
case AcceleratedVideoDecoder::kRanOutOfStreamData:
decoder_current_bitstream_buffer_.reset();
if (!TrySetNewBistreamBuffer())
return;
break;
case AcceleratedVideoDecoder::kRanOutOfSurfaces:
// No more surfaces for the decoder, we'll come back once we have more.
DVLOGF(4) << "Ran out of surfaces";
return;
case AcceleratedVideoDecoder::kNeedContextUpdate:
DVLOGF(4) << "Awaiting context update";
return;
case AcceleratedVideoDecoder::kDecodeError:
VLOGF(1) << "Error decoding stream";
NOTIFY_ERROR(PLATFORM_FAILURE);
return;
case AcceleratedVideoDecoder::kTryAgain:
NOTREACHED() << "Should not reach here unless this class accepts "
"encrypted streams.";
DVLOGF(4) << "No key for decoding stream.";
NOTIFY_ERROR(PLATFORM_FAILURE);
return;
}
}
}
void V4L2SliceVideoDecodeAccelerator::InitiateSurfaceSetChange() {
VLOGF(2);
DCHECK(decoder_thread_task_runner_->BelongsToCurrentThread());
DCHECK_EQ(state_, kDecoding);
DCHECK(!surface_set_change_pending_);
surface_set_change_pending_ = true;
NewEventPending();
}
bool V4L2SliceVideoDecodeAccelerator::FinishSurfaceSetChange() {
VLOGF(2);
DCHECK(decoder_thread_task_runner_->BelongsToCurrentThread());
if (!surface_set_change_pending_)
return true;
if (!surfaces_at_device_.empty())
return false;
DCHECK_EQ(state_, kIdle);
DCHECK(decoder_display_queue_.empty());
// All output buffers should've been returned from decoder and device by now.
// The only remaining owner of surfaces may be display (client), and we will
// dismiss them when destroying output buffers below.
DCHECK_EQ(free_output_buffers_.size() + surfaces_at_display_.size(),
output_buffer_map_.size());
// Keep input queue running while we switch outputs.
if (!StopDevicePoll(true)) {
NOTIFY_ERROR(PLATFORM_FAILURE);
return false;
}
// Dequeued decoded surfaces may be pended in pending_picture_ready_ if they
// are waiting for some pictures to be cleared. We should post them right away
// because they are about to be dismissed and destroyed for surface set
// change.
SendPictureReady();
// This will return only once all buffers are dismissed and destroyed.
// This does not wait until they are displayed however, as display retains
// references to the buffers bound to textures and will release them
// after displaying.
if (!DestroyOutputs(true)) {
NOTIFY_ERROR(PLATFORM_FAILURE);
return false;
}
if (!CreateOutputBuffers()) {
NOTIFY_ERROR(PLATFORM_FAILURE);
return false;
}
surface_set_change_pending_ = false;
VLOGF(2) << "Surface set change finished";
return true;
}
bool V4L2SliceVideoDecodeAccelerator::DestroyOutputs(bool dismiss) {
VLOGF(2);
DCHECK(decoder_thread_task_runner_->BelongsToCurrentThread());
std::vector<int32_t> picture_buffers_to_dismiss;
if (output_buffer_map_.empty())
return true;
for (auto& output_record : output_buffer_map_) {
DCHECK(!output_record.at_device);
output_record.egl_fence.reset();
picture_buffers_to_dismiss.push_back(output_record.picture_id);
}
if (dismiss) {
VLOGF(2) << "Scheduling picture dismissal";
base::WaitableEvent done(base::WaitableEvent::ResetPolicy::AUTOMATIC,
base::WaitableEvent::InitialState::NOT_SIGNALED);
child_task_runner_->PostTask(
FROM_HERE,
base::BindOnce(&V4L2SliceVideoDecodeAccelerator::DismissPictures,
weak_this_, picture_buffers_to_dismiss, &done));
done.Wait();
}
// At this point client can't call ReusePictureBuffer on any of the pictures
// anymore, so it's safe to destroy.
return DestroyOutputBuffers();
}
bool V4L2SliceVideoDecodeAccelerator::DestroyOutputBuffers() {
VLOGF(2);
DCHECK(decoder_thread_task_runner_->BelongsToCurrentThread() ||
!decoder_thread_.IsRunning());
DCHECK(!output_streamon_);
DCHECK(surfaces_at_device_.empty());
DCHECK(decoder_display_queue_.empty());
DCHECK_EQ(surfaces_at_display_.size() + free_output_buffers_.size(),
output_buffer_map_.size());
if (output_buffer_map_.empty())
return true;
// It's ok to do this, client will retain references to textures, but we are
// not interested in reusing the surfaces anymore.
// This will prevent us from reusing old surfaces in case we have some
// ReusePictureBuffer() pending on ChildThread already. It's ok to ignore
// them, because we have already dismissed them (in DestroyOutputs()).
for (const auto& surface_at_display : surfaces_at_display_) {
size_t index = surface_at_display.second->output_record();
DCHECK_LT(index, output_buffer_map_.size());
OutputRecord& output_record = output_buffer_map_[index];
DCHECK(output_record.at_client);
output_record.at_client = false;
output_record.num_times_sent_to_client = 0;
}
surfaces_at_display_.clear();
DCHECK_EQ(free_output_buffers_.size(), output_buffer_map_.size());
free_output_buffers_.clear();
output_buffer_map_.clear();
struct v4l2_requestbuffers reqbufs;
memset(&reqbufs, 0, sizeof(reqbufs));
reqbufs.count = 0;
reqbufs.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
reqbufs.memory = V4L2_MEMORY_MMAP;
IOCTL_OR_ERROR_RETURN_FALSE(VIDIOC_REQBUFS, &reqbufs);
return true;
}
void V4L2SliceVideoDecodeAccelerator::AssignPictureBuffers(
const std::vector<PictureBuffer>& buffers) {
VLOGF(2);
DCHECK(child_task_runner_->BelongsToCurrentThread());
decoder_thread_task_runner_->PostTask(
FROM_HERE,
base::Bind(&V4L2SliceVideoDecodeAccelerator::AssignPictureBuffersTask,
base::Unretained(this), buffers));
}
void V4L2SliceVideoDecodeAccelerator::AssignPictureBuffersTask(
const std::vector<PictureBuffer>& buffers) {
VLOGF(2);
DCHECK(decoder_thread_task_runner_->BelongsToCurrentThread());
DCHECK_EQ(state_, kAwaitingPictureBuffers);
if (IsDestroyPending())
return;
const uint32_t req_buffer_count = decoder_->GetRequiredNumOfPictures();
if (buffers.size() < req_buffer_count) {
VLOGF(1) << "Failed to provide requested picture buffers. "
<< "(Got " << buffers.size() << ", requested " << req_buffer_count
<< ")";
NOTIFY_ERROR(INVALID_ARGUMENT);
return;
}
// Allocate the output buffers.
struct v4l2_requestbuffers reqbufs;
memset(&reqbufs, 0, sizeof(reqbufs));
reqbufs.count = buffers.size();
reqbufs.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
reqbufs.memory =
(output_mode_ == Config::OutputMode::ALLOCATE ? V4L2_MEMORY_MMAP
: V4L2_MEMORY_DMABUF);
IOCTL_OR_ERROR_RETURN(VIDIOC_REQBUFS, &reqbufs);
if (reqbufs.count != buffers.size()) {
VLOGF(1) << "Could not allocate enough output buffers";
NOTIFY_ERROR(PLATFORM_FAILURE);
return;
}
DCHECK(free_output_buffers_.empty());
DCHECK(output_buffer_map_.empty());
output_buffer_map_.resize(buffers.size());
for (size_t i = 0; i < output_buffer_map_.size(); ++i) {
DCHECK(buffers[i].size() == coded_size_);
OutputRecord& output_record = output_buffer_map_[i];
DCHECK(!output_record.at_device);
DCHECK(!output_record.at_client);
DCHECK(!output_record.egl_fence);
DCHECK_EQ(output_record.picture_id, -1);
DCHECK(output_record.dmabuf_fds.empty());
DCHECK_EQ(output_record.cleared, false);
output_record.picture_id = buffers[i].id();
output_record.texture_id = buffers[i].service_texture_ids().empty()
? 0
: buffers[i].service_texture_ids()[0];
output_record.client_texture_id = buffers[i].client_texture_ids().empty()
? 0
: buffers[i].client_texture_ids()[0];
// This will remain true until ImportBufferForPicture is called, either by
// the client, or by ourselves, if we are allocating.
output_record.at_client = true;
if (output_mode_ == Config::OutputMode::ALLOCATE) {
std::vector<base::ScopedFD> passed_dmabuf_fds =
device_->GetDmabufsForV4L2Buffer(i, output_planes_count_,
V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE);
if (passed_dmabuf_fds.empty()) {
NOTIFY_ERROR(PLATFORM_FAILURE);
return;
}
ImportBufferForPictureTask(output_record.picture_id,
std::move(passed_dmabuf_fds));
} // else we'll get triggered via ImportBufferForPicture() from client.
DVLOGF(3) << "buffer[" << i << "]: picture_id=" << output_record.picture_id;
}
if (!StartDevicePoll()) {
NOTIFY_ERROR(PLATFORM_FAILURE);
return;
}
// Put us in kIdle to allow further event processing.
// ProcessPendingEventsIfNeeded() will put us back into kDecoding after all
// other pending events are processed successfully.
state_ = kIdle;
ProcessPendingEventsIfNeeded();
}
void V4L2SliceVideoDecodeAccelerator::CreateGLImageFor(
size_t buffer_index,
int32_t picture_buffer_id,
std::vector<base::ScopedFD> passed_dmabuf_fds,
GLuint client_texture_id,
GLuint texture_id,
const gfx::Size& size,
uint32_t fourcc) {
DVLOGF(3) << "index=" << buffer_index;
DCHECK(child_task_runner_->BelongsToCurrentThread());
DCHECK_NE(texture_id, 0u);
if (!make_context_current_cb_) {
VLOGF(1) << "GL callbacks required for binding to GLImages";
NOTIFY_ERROR(INVALID_ARGUMENT);
return;
}
if (!make_context_current_cb_.Run()) {
VLOGF(1) << "No GL context";
NOTIFY_ERROR(INVALID_ARGUMENT);
return;
}
scoped_refptr<gl::GLImage> gl_image =
device_->CreateGLImage(size, fourcc, passed_dmabuf_fds);
if (!gl_image) {
VLOGF(1) << "Could not create GLImage,"
<< " index=" << buffer_index << " texture_id=" << texture_id;
NOTIFY_ERROR(PLATFORM_FAILURE);
return;
}
gl::ScopedTextureBinder bind_restore(device_->GetTextureTarget(), texture_id);
bool ret = gl_image->BindTexImage(device_->GetTextureTarget());
DCHECK(ret);
bind_image_cb_.Run(client_texture_id, device_->GetTextureTarget(), gl_image,
true);
decoder_thread_task_runner_->PostTask(
FROM_HERE,
base::BindOnce(&V4L2SliceVideoDecodeAccelerator::AssignDmaBufs,
base::Unretained(this), buffer_index, picture_buffer_id,
std::move(passed_dmabuf_fds)));
}
void V4L2SliceVideoDecodeAccelerator::AssignDmaBufs(
size_t buffer_index,
int32_t picture_buffer_id,
std::vector<base::ScopedFD> passed_dmabuf_fds) {
DVLOGF(3) << "index=" << buffer_index;
DCHECK(decoder_thread_task_runner_->BelongsToCurrentThread());
if (IsDestroyPending())
return;
// It's possible that while waiting for the EGLImages to be allocated and
// assigned, we have already decoded more of the stream and saw another
// resolution change. This is a normal situation, in such a case either there
// is no output record with this index awaiting an EGLImage to be assigned to
// it, or the record is already updated to use a newer PictureBuffer and is
// awaiting an EGLImage associated with a different picture_buffer_id. If so,
// just discard this image, we will get the one we are waiting for later.
if (buffer_index >= output_buffer_map_.size() ||
output_buffer_map_[buffer_index].picture_id != picture_buffer_id) {
DVLOGF(4) << "Picture set already changed, dropping EGLImage";
return;
}
OutputRecord& output_record = output_buffer_map_[buffer_index];
DCHECK(!output_record.egl_fence);
DCHECK(!output_record.at_client);
DCHECK(!output_record.at_device);
if (output_mode_ == Config::OutputMode::IMPORT) {
DCHECK(output_record.dmabuf_fds.empty());
output_record.dmabuf_fds = std::move(passed_dmabuf_fds);
}
DCHECK_EQ(std::count(free_output_buffers_.begin(), free_output_buffers_.end(),
buffer_index),
0);
free_output_buffers_.push_back(buffer_index);
ScheduleDecodeBufferTaskIfNeeded();
}
void V4L2SliceVideoDecodeAccelerator::ImportBufferForPicture(
int32_t picture_buffer_id,
VideoPixelFormat pixel_format,
const gfx::GpuMemoryBufferHandle& gpu_memory_buffer_handle) {
DVLOGF(3) << "picture_buffer_id=" << picture_buffer_id;
DCHECK(child_task_runner_->BelongsToCurrentThread());
std::vector<base::ScopedFD> passed_dmabuf_fds;
#if defined(USE_OZONE)
for (const auto& fd : gpu_memory_buffer_handle.native_pixmap_handle.fds) {
DCHECK_NE(fd.fd, -1);
passed_dmabuf_fds.push_back(base::ScopedFD(fd.fd));
}
#endif
if (output_mode_ != Config::OutputMode::IMPORT) {
VLOGF(1) << "Cannot import in non-import mode";
NOTIFY_ERROR(INVALID_ARGUMENT);
return;
}
if (pixel_format !=
V4L2Device::V4L2PixFmtToVideoPixelFormat(output_format_fourcc_)) {
VLOGF(1) << "Unsupported import format: "
<< VideoPixelFormatToString(pixel_format);
NOTIFY_ERROR(INVALID_ARGUMENT);
return;
}
decoder_thread_task_runner_->PostTask(
FROM_HERE,
base::BindOnce(
&V4L2SliceVideoDecodeAccelerator::ImportBufferForPictureTask,
base::Unretained(this), picture_buffer_id,
std::move(passed_dmabuf_fds)));
}
void V4L2SliceVideoDecodeAccelerator::ImportBufferForPictureTask(
int32_t picture_buffer_id,
std::vector<base::ScopedFD> passed_dmabuf_fds) {
DVLOGF(3) << "picture_buffer_id=" << picture_buffer_id;
DCHECK(decoder_thread_task_runner_->BelongsToCurrentThread());
if (IsDestroyPending())
return;
const auto iter =
std::find_if(output_buffer_map_.begin(), output_buffer_map_.end(),
[picture_buffer_id](const OutputRecord& output_record) {
return output_record.picture_id == picture_buffer_id;
});
if (iter == output_buffer_map_.end()) {
// It's possible that we've already posted a DismissPictureBuffer for this
// picture, but it has not yet executed when this ImportBufferForPicture was
// posted to us by the client. In that case just ignore this (we've already
// dismissed it and accounted for that).
DVLOGF(3) << "got picture id=" << picture_buffer_id
<< " not in use (anymore?).";
return;
}
if (!iter->at_client) {
VLOGF(1) << "Cannot import buffer that not owned by client";
NOTIFY_ERROR(INVALID_ARGUMENT);
return;
}
size_t index = iter - output_buffer_map_.begin();
DCHECK_EQ(std::count(free_output_buffers_.begin(), free_output_buffers_.end(),
index),
0);
DCHECK(!iter->at_device);
iter->at_client = false;
if (iter->texture_id != 0) {
child_task_runner_->PostTask(
FROM_HERE,
base::BindOnce(&V4L2SliceVideoDecodeAccelerator::CreateGLImageFor,
weak_this_, index, picture_buffer_id,
std::move(passed_dmabuf_fds), iter->client_texture_id,
iter->texture_id, coded_size_, output_format_fourcc_));
} else {
// No need for a GLImage, start using this buffer now.
DCHECK_EQ(output_planes_count_, passed_dmabuf_fds.size());
iter->dmabuf_fds = std::move(passed_dmabuf_fds);
free_output_buffers_.push_back(index);
ScheduleDecodeBufferTaskIfNeeded();
}
}
void V4L2SliceVideoDecodeAccelerator::ReusePictureBuffer(
int32_t picture_buffer_id) {
DCHECK(child_task_runner_->BelongsToCurrentThread());
DVLOGF(4) << "picture_buffer_id=" << picture_buffer_id;
std::unique_ptr<gl::GLFenceEGL> egl_fence;
if (make_context_current_cb_) {
if (!make_context_current_cb_.Run()) {
VLOGF(1) << "could not make context current";
NOTIFY_ERROR(PLATFORM_FAILURE);
return;
}
egl_fence = gl::GLFenceEGL::Create();
if (!egl_fence) {
VLOGF(1) << "gl::GLFenceEGL::Create() failed";
NOTIFY_ERROR(PLATFORM_FAILURE);
return;
}
}
decoder_thread_task_runner_->PostTask(
FROM_HERE,
base::Bind(&V4L2SliceVideoDecodeAccelerator::ReusePictureBufferTask,
base::Unretained(this), picture_buffer_id,
base::Passed(&egl_fence)));
}
void V4L2SliceVideoDecodeAccelerator::ReusePictureBufferTask(
int32_t picture_buffer_id,
std::unique_ptr<gl::GLFenceEGL> egl_fence) {
DVLOGF(4) << "picture_buffer_id=" << picture_buffer_id;
DCHECK(decoder_thread_task_runner_->BelongsToCurrentThread());
if (IsDestroyPending())
return;
V4L2DecodeSurfaceByPictureBufferId::iterator it =
surfaces_at_display_.find(picture_buffer_id);
if (it == surfaces_at_display_.end()) {
// It's possible that we've already posted a DismissPictureBuffer for this
// picture, but it has not yet executed when this ReusePictureBuffer was
// posted to us by the client. In that case just ignore this (we've already
// dismissed it and accounted for that) and let the fence object get
// destroyed.
DVLOGF(3) << "got picture id=" << picture_buffer_id
<< " not in use (anymore?).";
return;
}
OutputRecord& output_record = output_buffer_map_[it->second->output_record()];
if (output_record.at_device || !output_record.at_client) {
VLOGF(1) << "picture_buffer_id not reusable";
NOTIFY_ERROR(INVALID_ARGUMENT);
return;
}
DCHECK(!output_record.at_device);
--output_record.num_times_sent_to_client;
// A output buffer might be sent multiple times. We only use the last fence.
// When the last fence is signaled, all the previous fences must be executed.
if (output_record.num_times_sent_to_client == 0) {
output_record.at_client = false;
// Take ownership of the EGL fence.
output_record.egl_fence = std::move(egl_fence);
surfaces_at_display_.erase(it);
}
}
void V4L2SliceVideoDecodeAccelerator::Flush() {
VLOGF(2);
DCHECK(child_task_runner_->BelongsToCurrentThread());
decoder_thread_task_runner_->PostTask(
FROM_HERE, base::BindOnce(&V4L2SliceVideoDecodeAccelerator::FlushTask,
base::Unretained(this)));
}
void V4L2SliceVideoDecodeAccelerator::FlushTask() {
VLOGF(2);
DCHECK(decoder_thread_task_runner_->BelongsToCurrentThread());
if (IsDestroyPending())
return;
// Queue an empty buffer which - when reached - will trigger flush sequence.
decoder_input_queue_.push(std::make_unique<BitstreamBufferRef>(
decode_client_, decode_task_runner_, nullptr, kFlushBufferId));
ScheduleDecodeBufferTaskIfNeeded();
}
void V4L2SliceVideoDecodeAccelerator::InitiateFlush() {
VLOGF(2);
DCHECK(decoder_thread_task_runner_->BelongsToCurrentThread());
// This will trigger output for all remaining surfaces in the decoder.
// However, not all of them may be decoded yet (they would be queued
// in hardware then).
if (!decoder_->Flush()) {
DVLOGF(1) << "Failed flushing the decoder.";
NOTIFY_ERROR(PLATFORM_FAILURE);
return;
}
// Put the decoder in an idle state, ready to resume.
decoder_->Reset();
DCHECK(!decoder_flushing_);
decoder_flushing_ = true;
NewEventPending();
}
bool V4L2SliceVideoDecodeAccelerator::FinishFlush() {
VLOGF(4);
DCHECK(decoder_thread_task_runner_->BelongsToCurrentThread());
if (!decoder_flushing_)
return true;
if (!surfaces_at_device_.empty())
return false;
DCHECK_EQ(state_, kIdle);
// At this point, all remaining surfaces are decoded and dequeued, and since
// we have already scheduled output for them in InitiateFlush(), their
// respective PictureReady calls have been posted (or they have been queued on
// pending_picture_ready_). So at this time, once we SendPictureReady(),
// we will have all remaining PictureReady() posted to the client and we
// can post NotifyFlushDone().
DCHECK(decoder_display_queue_.empty());
// Decoder should have already returned all surfaces and all surfaces are
// out of hardware. There can be no other owners of input buffers.
DCHECK_EQ(free_input_buffers_.size(), input_buffer_map_.size());
SendPictureReady();
decoder_flushing_ = false;
VLOGF(2) << "Flush finished";
child_task_runner_->PostTask(FROM_HERE,
base::Bind(&Client::NotifyFlushDone, client_));
return true;
}
void V4L2SliceVideoDecodeAccelerator::Reset() {
VLOGF(2);
DCHECK(child_task_runner_->BelongsToCurrentThread());
decoder_thread_task_runner_->PostTask(
FROM_HERE, base::BindOnce(&V4L2SliceVideoDecodeAccelerator::ResetTask,
base::Unretained(this)));
}
void V4L2SliceVideoDecodeAccelerator::ResetTask() {
VLOGF(2);
DCHECK(decoder_thread_task_runner_->BelongsToCurrentThread());
if (IsDestroyPending())
return;
if (decoder_resetting_) {
// This is a bug in the client, multiple Reset()s before NotifyResetDone()
// are not allowed.
NOTREACHED() << "Client should not be requesting multiple Reset()s";
return;
}
// Put the decoder in an idle state, ready to resume.
decoder_->Reset();
// Drop all remaining inputs.
decoder_current_bitstream_buffer_.reset();
while (!decoder_input_queue_.empty())
decoder_input_queue_.pop();
decoder_resetting_ = true;
NewEventPending();
}
bool V4L2SliceVideoDecodeAccelerator::FinishReset() {
VLOGF(4);
DCHECK(decoder_thread_task_runner_->BelongsToCurrentThread());
if (!decoder_resetting_)
return true;
if (!surfaces_at_device_.empty())
return false;
DCHECK_EQ(state_, kIdle);
DCHECK(!decoder_flushing_);
SendPictureReady();
// Drop any pending outputs.
while (!decoder_display_queue_.empty())
decoder_display_queue_.pop();
// At this point we can have no input buffers in the decoder, because we
// Reset()ed it in ResetTask(), and have not scheduled any new Decode()s
// having been in kIdle since. We don't have any surfaces in the HW either -
// we just checked that surfaces_at_device_.empty(), and inputs are tied
// to surfaces. Since there can be no other owners of input buffers, we can
// simply mark them all as available.
DCHECK_EQ(input_buffer_queued_count_, 0);
free_input_buffers_.clear();
for (size_t i = 0; i < input_buffer_map_.size(); ++i) {
DCHECK(!input_buffer_map_[i].at_device);
ReuseInputBuffer(i);
}
decoder_resetting_ = false;
VLOGF(2) << "Reset finished";
child_task_runner_->PostTask(FROM_HERE,
base::Bind(&Client::NotifyResetDone, client_));
return true;
}
bool V4L2SliceVideoDecodeAccelerator::IsDestroyPending() {
return destroy_pending_.IsSignaled();
}
void V4L2SliceVideoDecodeAccelerator::SetErrorState(Error error) {
// We can touch decoder_state_ only if this is the decoder thread or the
// decoder thread isn't running.
if (decoder_thread_.IsRunning() &&
!decoder_thread_task_runner_->BelongsToCurrentThread()) {
decoder_thread_task_runner_->PostTask(
FROM_HERE,
base::BindOnce(&V4L2SliceVideoDecodeAccelerator::SetErrorState,
base::Unretained(this), error));
return;
}
// Notifying the client of an error will only happen if we are already
// initialized, as the API does not allow doing so before that. Subsequent
// errors and errors while destroying will be suppressed.
if (state_ != kError && state_ != kUninitialized && state_ != kDestroying)
NotifyError(error);
state_ = kError;
}
bool V4L2SliceVideoDecodeAccelerator::SubmitSlice(
const scoped_refptr<V4L2DecodeSurface>& dec_surface,
const uint8_t* data,
size_t size) {
DCHECK(decoder_thread_task_runner_->BelongsToCurrentThread());
InputRecord& input_record = input_buffer_map_[dec_surface->input_record()];
if (input_record.bytes_used + size > input_record.length) {
VLOGF(1) << "Input buffer too small";
return false;
}
memcpy(static_cast<uint8_t*>(input_record.address) + input_record.bytes_used,
data, size);
input_record.bytes_used += size;
return true;
}
void V4L2SliceVideoDecodeAccelerator::DecodeSurface(
const scoped_refptr<V4L2DecodeSurface>& dec_surface) {
DCHECK(decoder_thread_task_runner_->BelongsToCurrentThread());
DVLOGF(3) << "Submitting decode for surface: " << dec_surface->ToString();
Enqueue(dec_surface);
}
void V4L2SliceVideoDecodeAccelerator::SurfaceReady(
const scoped_refptr<V4L2DecodeSurface>& dec_surface,
int32_t bitstream_id,
const gfx::Rect& visible_rect,
const VideoColorSpace& /* color_space */) {
DVLOGF(4);
DCHECK(decoder_thread_task_runner_->BelongsToCurrentThread());
dec_surface->SetVisibleRect(visible_rect);
decoder_display_queue_.push(std::make_pair(bitstream_id, dec_surface));
TryOutputSurfaces();
}
void V4L2SliceVideoDecodeAccelerator::TryOutputSurfaces() {
while (!decoder_display_queue_.empty()) {
scoped_refptr<V4L2DecodeSurface> dec_surface =
decoder_display_queue_.front().second;
if (!dec_surface->decoded())
break;
int32_t bitstream_id = decoder_display_queue_.front().first;
decoder_display_queue_.pop();
OutputSurface(bitstream_id, dec_surface);
}
}
void V4L2SliceVideoDecodeAccelerator::OutputSurface(
int32_t bitstream_id,
const scoped_refptr<V4L2DecodeSurface>& dec_surface) {
DCHECK(decoder_thread_task_runner_->BelongsToCurrentThread());
OutputRecord& output_record =
output_buffer_map_[dec_surface->output_record()];
if (output_record.num_times_sent_to_client == 0) {
DCHECK(!output_record.at_client);
output_record.at_client = true;
bool inserted =
surfaces_at_display_
.insert(std::make_pair(output_record.picture_id, dec_surface))
.second;
DCHECK(inserted);
} else {
// The surface is already sent to client, and not returned back yet.
DCHECK(output_record.at_client);
DCHECK(surfaces_at_display_.find(output_record.picture_id) !=
surfaces_at_display_.end());
CHECK(surfaces_at_display_[output_record.picture_id].get() ==
dec_surface.get());
}
DCHECK(!output_record.at_device);
DCHECK_NE(output_record.picture_id, -1);
++output_record.num_times_sent_to_client;
// TODO(hubbe): Insert correct color space. http://crbug.com/647725
Picture picture(output_record.picture_id, bitstream_id,
dec_surface->visible_rect(), gfx::ColorSpace(),
true /* allow_overlay */);
DVLOGF(4) << dec_surface->ToString()
<< ", bitstream_id: " << picture.bitstream_buffer_id()
<< ", picture_id: " << picture.picture_buffer_id()
<< ", visible_rect: " << picture.visible_rect().ToString();
pending_picture_ready_.push(PictureRecord(output_record.cleared, picture));
SendPictureReady();
output_record.cleared = true;
}
scoped_refptr<V4L2DecodeSurface>
V4L2SliceVideoDecodeAccelerator::CreateSurface() {
DCHECK(decoder_thread_task_runner_->BelongsToCurrentThread());
DCHECK_EQ(state_, kDecoding);
if (free_input_buffers_.empty() || free_output_buffers_.empty())
return nullptr;
int input = free_input_buffers_.front();
free_input_buffers_.pop_front();
int output = free_output_buffers_.front();
free_output_buffers_.pop_front();
InputRecord& input_record = input_buffer_map_[input];
DCHECK_EQ(input_record.bytes_used, 0u);
DCHECK_EQ(input_record.input_id, -1);
DCHECK(decoder_current_bitstream_buffer_ != nullptr);
input_record.input_id = decoder_current_bitstream_buffer_->input_id;
scoped_refptr<V4L2DecodeSurface> dec_surface = new V4L2DecodeSurface(
input, output,
base::Bind(&V4L2SliceVideoDecodeAccelerator::ReuseOutputBuffer,
base::Unretained(this)));
DVLOGF(4) << "Created surface " << input << " -> " << output;
return dec_surface;
}
void V4L2SliceVideoDecodeAccelerator::SendPictureReady() {
DVLOGF(4);
DCHECK(decoder_thread_task_runner_->BelongsToCurrentThread());
bool send_now =
(decoder_resetting_ || decoder_flushing_ || surface_set_change_pending_);
while (!pending_picture_ready_.empty()) {
bool cleared = pending_picture_ready_.front().cleared;
const Picture& picture = pending_picture_ready_.front().picture;
if (cleared && picture_clearing_count_ == 0) {
DVLOGF(4) << "Posting picture ready to decode task runner for: "
<< picture.picture_buffer_id();
// This picture is cleared. It can be posted to a thread different than
// the main GPU thread to reduce latency. This should be the case after
// all pictures are cleared at the beginning.
decode_task_runner_->PostTask(
FROM_HERE,
base::Bind(&Client::PictureReady, decode_client_, picture));
pending_picture_ready_.pop();
} else if (!cleared || send_now) {
DVLOGF(4) << "cleared=" << pending_picture_ready_.front().cleared
<< ", decoder_resetting_=" << decoder_resetting_
<< ", decoder_flushing_=" << decoder_flushing_
<< ", surface_set_change_pending_="
<< surface_set_change_pending_
<< ", picture_clearing_count_=" << picture_clearing_count_;
DVLOGF(4) << "Posting picture ready to GPU for: "
<< picture.picture_buffer_id();
// If the picture is not cleared, post it to the child thread because it
// has to be cleared in the child thread. A picture only needs to be
// cleared once. If the decoder is resetting or flushing or changing
// resolution, send all pictures to ensure PictureReady arrive before
// reset done, flush done, or picture dismissed.
child_task_runner_->PostTaskAndReply(
FROM_HERE, base::BindOnce(&Client::PictureReady, client_, picture),
// Unretained is safe. If Client::PictureReady gets to run, |this| is
// alive. Destroy() will wait the decode thread to finish.
base::Bind(&V4L2SliceVideoDecodeAccelerator::PictureCleared,
base::Unretained(this)));
picture_clearing_count_++;
pending_picture_ready_.pop();
} else {
// This picture is cleared. But some pictures are about to be cleared on
// the child thread. To preserve the order, do not send this until those
// pictures are cleared.
break;
}
}
}
void V4L2SliceVideoDecodeAccelerator::PictureCleared() {
DVLOGF(4) << "clearing count=" << picture_clearing_count_;
DCHECK(decoder_thread_task_runner_->BelongsToCurrentThread());
DCHECK_GT(picture_clearing_count_, 0);
picture_clearing_count_--;
SendPictureReady();
}
bool V4L2SliceVideoDecodeAccelerator::TryToSetupDecodeOnSeparateThread(
const base::WeakPtr<Client>& decode_client,
const scoped_refptr<base::SingleThreadTaskRunner>& decode_task_runner) {
decode_client_ = decode_client;
decode_task_runner_ = decode_task_runner;
return true;
}
// static
VideoDecodeAccelerator::SupportedProfiles
V4L2SliceVideoDecodeAccelerator::GetSupportedProfiles() {
scoped_refptr<V4L2Device> device = V4L2Device::Create();
if (!device)
return SupportedProfiles();
return device->GetSupportedDecodeProfiles(
base::size(supported_input_fourccs_), supported_input_fourccs_);
}
} // namespace media