// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "media/gpu/v4l2/legacy/v4l2_video_decoder_backend_stateful.h"
#include <cstddef>
#include <memory>
#include <optional>
#include <tuple>
#include <utility>
#include "base/containers/contains.h"
#include "base/functional/bind.h"
#include "base/logging.h"
#include "base/metrics/histogram_macros.h"
#include "base/sequence_checker.h"
#include "base/task/sequenced_task_runner.h"
#include "media/base/limits.h"
#include "media/base/platform_features.h"
#include "media/base/video_codecs.h"
#include "media/gpu/chromeos/dmabuf_video_frame_pool.h"
#include "media/gpu/chromeos/platform_video_frame_utils.h"
#include "media/gpu/chromeos/video_frame_resource.h"
#include "media/gpu/macros.h"
#include "media/gpu/v4l2/v4l2_device.h"
#include "media/gpu/v4l2/v4l2_vda_helpers.h"
#include "media/gpu/v4l2/v4l2_video_decoder_backend.h"
#include "media/gpu/v4l2/v4l2_vp9_helpers.h"
namespace media {
namespace {
bool IsVp9KSVCStream(VideoCodecProfile profile,
const DecoderBuffer& decoder_buffer) {
return VideoCodecProfileToVideoCodec(profile) == VideoCodec::kVP9 &&
decoder_buffer.has_side_data() &&
!decoder_buffer.side_data()->spatial_layers.empty();
}
bool IsVp9KSVCSupportedDriver(const std::string& driver_name) {
const std::string kVP9KSVCSupportedDrivers[] = {"qcom-venus"};
return base::Contains(kVP9KSVCSupportedDrivers, driver_name);
}
std::optional<uint8_t> V4L2PixelFormatToBitDepth(uint32_t v4l2_pixelformat) {
const auto fourcc = Fourcc::FromV4L2PixFmt(v4l2_pixelformat);
if (fourcc) {
return BitDepth(fourcc->ToVideoPixelFormat());
}
return std::nullopt;
}
} // namespace
V4L2StatefulVideoDecoderBackend::DecodeRequest::DecodeRequest(
scoped_refptr<DecoderBuffer> buf,
VideoDecoder::DecodeCB cb)
: buffer(std::move(buf)), decode_cb(std::move(cb)) {}
V4L2StatefulVideoDecoderBackend::DecodeRequest::DecodeRequest(DecodeRequest&&) =
default;
V4L2StatefulVideoDecoderBackend::DecodeRequest&
V4L2StatefulVideoDecoderBackend::DecodeRequest::operator=(DecodeRequest&&) =
default;
V4L2StatefulVideoDecoderBackend::DecodeRequest::~DecodeRequest() = default;
bool V4L2StatefulVideoDecoderBackend::DecodeRequest::IsCompleted() const {
return bytes_used == buffer->size();
}
V4L2StatefulVideoDecoderBackend::V4L2StatefulVideoDecoderBackend(
Client* const client,
scoped_refptr<V4L2Device> device,
VideoCodecProfile profile,
const VideoColorSpace& color_space,
scoped_refptr<base::SequencedTaskRunner> task_runner)
: V4L2VideoDecoderBackend(client, std::move(device)),
driver_name_(device_->GetDriverName()),
profile_(profile),
color_space_(color_space),
task_runner_(task_runner) {
DVLOGF(3);
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
weak_this_ = weak_this_factory_.GetWeakPtr();
}
V4L2StatefulVideoDecoderBackend::~V4L2StatefulVideoDecoderBackend() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
DVLOGF(3);
if (flush_cb_ || current_decode_request_ || !decode_request_queue_.empty()) {
VLOGF(1) << "Should not destroy backend during pending decode!";
}
struct v4l2_event_subscription sub;
memset(&sub, 0, sizeof(sub));
sub.type = V4L2_EVENT_SOURCE_CHANGE;
if (device_->Ioctl(VIDIOC_UNSUBSCRIBE_EVENT, &sub) != 0) {
VLOGF(1) << "Cannot unsubscribe to event";
}
}
bool V4L2StatefulVideoDecoderBackend::Initialize() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
DVLOGF(3);
if (!IsSupportedProfile(profile_)) {
VLOGF(1) << "Unsupported profile " << GetProfileName(profile_);
return false;
}
frame_splitter_ =
v4l2_vda_helpers::InputBufferFragmentSplitter::CreateFromProfile(
profile_);
if (!frame_splitter_) {
VLOGF(1) << "Failed to create frame splitter";
return false;
}
struct v4l2_event_subscription sub;
memset(&sub, 0, sizeof(sub));
sub.type = V4L2_EVENT_SOURCE_CHANGE;
if (device_->Ioctl(VIDIOC_SUBSCRIBE_EVENT, &sub) != 0) {
VLOGF(1) << "Cannot subscribe to event";
return false;
}
framerate_control_ = std::make_unique<V4L2FrameRateControl>(
base::BindRepeating(&V4L2Device::Ioctl, device_), task_runner_);
return true;
}
void V4L2StatefulVideoDecoderBackend::EnqueueDecodeTask(
scoped_refptr<DecoderBuffer> buffer,
VideoDecoder::DecodeCB decode_cb) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
DVLOGF(3);
if (!buffer->end_of_stream()) {
has_pending_requests_ = true;
}
decode_request_queue_.push(
DecodeRequest(std::move(buffer), std::move(decode_cb)));
DoDecodeWork();
}
void V4L2StatefulVideoDecoderBackend::DoDecodeWork() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
DVLOGF(3);
// Do not decode if a flush or resolution change is in progress.
if (!client_->IsDecoding())
return;
if (need_resume_resolution_change_) {
need_resume_resolution_change_ = false;
ChangeResolution();
if (!client_->IsDecoding())
return;
}
// Get a new decode request if none is in progress.
if (!current_decode_request_) {
// No more decode request, nothing to do for now.
if (decode_request_queue_.empty())
return;
auto decode_request = std::move(decode_request_queue_.front());
decode_request_queue_.pop();
// Need to flush?
if (decode_request.buffer->end_of_stream()) {
InitiateFlush(std::move(decode_request.decode_cb));
return;
}
// This is our new decode request.
current_decode_request_ = std::move(decode_request);
DCHECK_EQ(current_decode_request_->bytes_used, 0u);
if (IsVp9KSVCStream(profile_, *current_decode_request_->buffer)) {
if (!IsVp9KSVCSupportedDriver(driver_name_)) {
DLOG(ERROR) << driver_name_ << " doesn't support VP9 k-SVC decoding";
client_->OnBackendError();
return;
}
if (!AppendVP9SuperFrameIndex(current_decode_request_->buffer)) {
LOG(ERROR) << "Failed to append superframe index for VP9 k-SVC frame";
client_->OnBackendError();
return;
}
}
}
// Get a V4L2 buffer to copy the encoded data into.
if (!current_input_buffer_) {
current_input_buffer_ = input_queue_->GetFreeBuffer();
// We will be called again once an input buffer becomes available.
if (!current_input_buffer_)
return;
// Record timestamp of the input buffer so it propagates to the decoded
// frames.
// TODO(mcasas): Consider using TimeDeltaToTimeVal().
const struct timespec timespec =
current_decode_request_->buffer->timestamp().ToTimeSpec();
struct timeval timestamp = {
.tv_sec = timespec.tv_sec,
.tv_usec = timespec.tv_nsec / 1000,
};
current_input_buffer_->SetTimeStamp(timestamp);
const int64_t flat_timespec =
base::TimeDelta::FromTimeSpec(timespec).InMilliseconds();
encoding_timestamps_[flat_timespec] = base::TimeTicks::Now();
}
// From here on we have both a decode request and input buffer, so we can
// progress with decoding.
DCHECK(current_decode_request_.has_value());
DCHECK(current_input_buffer_.has_value());
const DecoderBuffer* current_buffer = current_decode_request_->buffer.get();
DCHECK_LT(current_decode_request_->bytes_used, current_buffer->size());
const uint8_t* const data =
current_buffer->data() + current_decode_request_->bytes_used;
const size_t data_size =
current_buffer->size() - current_decode_request_->bytes_used;
size_t bytes_to_copy = 0;
if (!frame_splitter_->AdvanceFrameFragment(data, data_size, &bytes_to_copy)) {
LOG(ERROR) << "Invalid bitstream detected.";
std::move(current_decode_request_->decode_cb)
.Run(DecoderStatus::Codes::kFailed);
current_decode_request_.reset();
current_input_buffer_.reset();
client_->OnBackendError();
return;
}
const size_t bytes_used = current_input_buffer_->GetPlaneBytesUsed(0);
if (bytes_used + bytes_to_copy > current_input_buffer_->GetPlaneSize(0)) {
LOG(ERROR) << "V4L2 buffer size is too small to contain a whole frame.";
std::move(current_decode_request_->decode_cb)
.Run(DecoderStatus::Codes::kFailed);
current_decode_request_.reset();
current_input_buffer_.reset();
client_->OnBackendError();
return;
}
uint8_t* dst =
static_cast<uint8_t*>(current_input_buffer_->GetPlaneMapping(0)) +
bytes_used;
memcpy(dst, data, bytes_to_copy);
current_input_buffer_->SetPlaneBytesUsed(0, bytes_used + bytes_to_copy);
current_decode_request_->bytes_used += bytes_to_copy;
// Release current_input_request_ if we reached its end.
if (current_decode_request_->IsCompleted()) {
std::move(current_decode_request_->decode_cb)
.Run(DecoderStatus::Codes::kOk);
current_decode_request_.reset();
}
// If we have a partial frame, wait before submitting it.
if (frame_splitter_->IsPartialFramePending()) {
VLOGF(4) << "Partial frame pending, not queueing any buffer now.";
return;
}
// The V4L2 input buffer contains a decodable entity, queue it.
if (!std::move(*current_input_buffer_).QueueMMap()) {
LOG(ERROR) << "Error while queuing input buffer!";
client_->OnBackendError();
}
current_input_buffer_.reset();
// If we can still progress on a decode request, do it.
if (current_decode_request_ || !decode_request_queue_.empty())
ScheduleDecodeWork();
}
void V4L2StatefulVideoDecoderBackend::ScheduleDecodeWork() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
DVLOGF(3);
task_runner_->PostTask(
FROM_HERE, base::BindOnce(&V4L2StatefulVideoDecoderBackend::DoDecodeWork,
weak_this_));
}
void V4L2StatefulVideoDecoderBackend::ProcessEventQueue() {
while (std::optional<struct v4l2_event> ev = device_->DequeueEvent()) {
if (ev->type == V4L2_EVENT_SOURCE_CHANGE &&
(ev->u.src_change.changes & V4L2_EVENT_SRC_CH_RESOLUTION)) {
ChangeResolution();
}
}
}
void V4L2StatefulVideoDecoderBackend::OnServiceDeviceTask(bool event) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
DVLOGF(3);
if (event)
ProcessEventQueue();
// We can enqueue dequeued output buffers immediately.
EnqueueOutputBuffers();
// Try to progress on our work since we may have dequeued input buffers.
DoDecodeWork();
}
void V4L2StatefulVideoDecoderBackend::EnqueueOutputBuffers() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
DVLOGF(3);
const v4l2_memory mem_type = output_queue_->GetMemoryType();
while (true) {
bool ret = false;
bool no_buffer = false;
std::optional<V4L2WritableBufferRef> buffer;
switch (mem_type) {
case V4L2_MEMORY_MMAP:
buffer = output_queue_->GetFreeBuffer();
if (!buffer) {
no_buffer = true;
break;
}
ret = std::move(*buffer).QueueMMap();
break;
case V4L2_MEMORY_DMABUF: {
scoped_refptr<FrameResource> frame = GetPoolVideoFrame();
// Running out of frame is not an error, we will be called again
// once frames are available.
if (!frame) {
return;
}
buffer =
output_queue_->GetFreeBufferForFrame(frame->GetSharedMemoryId());
if (!buffer) {
no_buffer = true;
break;
}
framerate_control_->AttachToFrameResource(frame);
ret = std::move(*buffer).QueueDMABuf(std::move(frame));
break;
}
default:
NOTREACHED_IN_MIGRATION();
}
// Running out of V4L2 buffers is not an error, so just exit the loop
// gracefully.
if (no_buffer)
break;
if (!ret) {
LOG(ERROR) << "Error while queueing output buffer!";
client_->OnBackendError();
}
}
DVLOGF(3) << output_queue_->QueuedBuffersCount() << "/"
<< output_queue_->AllocatedBuffersCount()
<< " output buffers queued";
}
scoped_refptr<FrameResource>
V4L2StatefulVideoDecoderBackend::GetPoolVideoFrame() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
DVLOGF(3);
DmabufVideoFramePool* pool = client_->GetVideoFramePool();
DCHECK_EQ(output_queue_->GetMemoryType(), V4L2_MEMORY_DMABUF);
DCHECK_NE(pool, nullptr);
scoped_refptr<FrameResource> frame = pool->GetFrame();
if (!frame) {
DVLOGF(3) << "No available VideoFrame for now";
// We will try again once a frame becomes available.
pool->NotifyWhenFrameAvailable(base::BindOnce(
base::IgnoreResult(&base::SequencedTaskRunner::PostTask), task_runner_,
FROM_HERE,
base::BindOnce(
base::IgnoreResult(
&V4L2StatefulVideoDecoderBackend::EnqueueOutputBuffers),
weak_this_)));
}
return frame;
}
// static
void V4L2StatefulVideoDecoderBackend::ReuseOutputBufferThunk(
scoped_refptr<base::SequencedTaskRunner> task_runner,
std::optional<base::WeakPtr<V4L2StatefulVideoDecoderBackend>> weak_this,
V4L2ReadableBufferRef buffer) {
DVLOGF(3);
DCHECK(weak_this);
if (task_runner->RunsTasksInCurrentSequence()) {
if (*weak_this)
(*weak_this)->ReuseOutputBuffer(std::move(buffer));
} else {
task_runner->PostTask(
FROM_HERE,
base::BindOnce(&V4L2StatefulVideoDecoderBackend::ReuseOutputBuffer,
*weak_this, std::move(buffer)));
}
}
void V4L2StatefulVideoDecoderBackend::ReuseOutputBuffer(
V4L2ReadableBufferRef buffer) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
DVLOGF(3) << "Reuse output buffer #" << buffer->BufferId();
// Lose reference to the buffer so it goes back to the free list.
buffer.reset();
// Enqueue the newly available buffer.
EnqueueOutputBuffers();
}
void V4L2StatefulVideoDecoderBackend::OnOutputBufferDequeued(
V4L2ReadableBufferRef buffer) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
DVLOGF(3);
// Zero-bytes buffers are returned as part of a flush and can be dismissed.
if (buffer->GetPlaneBytesUsed(0) > 0) {
// TODO(mcasas): Consider using TimeValToTimeDelta().
const struct timeval timeval = buffer->GetTimeStamp();
const struct timespec timespec = {
.tv_sec = timeval.tv_sec,
.tv_nsec = timeval.tv_usec * 1000,
};
const int64_t flat_timespec =
base::TimeDelta::FromTimeSpec(timespec).InMilliseconds();
// TODO(b/190615065) |flat_timespec| might be repeated with H.264
// bitstreams, investigate why, and change the if() to DCHECK().
if (base::Contains(encoding_timestamps_, flat_timespec)) {
UMA_HISTOGRAM_TIMES(
"Media.PlatformVideoDecoding.Decode",
base::TimeTicks::Now() - encoding_timestamps_[flat_timespec]);
encoding_timestamps_.erase(flat_timespec);
}
scoped_refptr<FrameResource> frame;
switch (output_queue_->GetMemoryType()) {
case V4L2_MEMORY_MMAP: {
// Wrap the frame into another one so we can be signaled when the
// consumer is done with it and reuse the V4L2 buffer.
scoped_refptr<FrameResource> origin_frame = buffer->GetFrameResource();
frame = origin_frame->CreateWrappingFrame();
frame->AddDestructionObserver(base::BindOnce(
&V4L2StatefulVideoDecoderBackend::ReuseOutputBufferThunk,
task_runner_, weak_this_, buffer));
break;
}
case V4L2_MEMORY_DMABUF:
// The frame from the frame pool that we passed to QueueDMABuf() has
// been decoded into. It can be output as-is.
frame = buffer->GetFrameResource();
break;
default:
NOTREACHED_IN_MIGRATION();
}
const base::TimeDelta timestamp = base::TimeDelta::FromTimeSpec(timespec);
// TODO(b/214190092): Get color space from the buffer.
client_->OutputFrame(std::move(frame), *visible_rect_, color_space_,
timestamp);
}
// We were waiting for the last buffer before a resolution change
// The order here is important! A flush event may come after a resolution
// change event (but not the opposite), so we must make sure both events
// are processed in the correct order.
if (buffer->IsLast()){
// Check that we don't have a resolution change event pending. If we do
// then this LAST buffer was related to it.
ProcessEventQueue();
if (resolution_change_cb_) {
std::move(resolution_change_cb_).Run();
} else if (flush_cb_) {
// We were waiting for a flush to complete, and received the last buffer.
CompleteFlush();
}
}
EnqueueOutputBuffers();
}
bool V4L2StatefulVideoDecoderBackend::InitiateFlush(
VideoDecoder::DecodeCB flush_cb) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
DVLOGF(3);
DCHECK(!flush_cb_);
// Submit any pending input buffer at the time of flush.
if (current_input_buffer_) {
if (!std::move(*current_input_buffer_).QueueMMap()) {
LOG(ERROR) << "Error while queuing input buffer!";
client_->OnBackendError();
}
current_input_buffer_.reset();
}
client_->InitiateFlush();
flush_cb_ = std::move(flush_cb);
// The stream could be stopped in the middle of the frame when the flush is
// being triggered. This makes sure there are no leftovers after the flush
// finishes.
frame_splitter_->Reset();
// Special case: if we haven't received any decoding request, we could
// complete the flush immediately.
if (!has_pending_requests_)
return CompleteFlush();
if (output_queue_->IsStreaming()) {
// If the CAPTURE queue is streaming, send the STOP command to the V4L2
// device. The device will let us know that the flush is completed by
// sending us a CAPTURE buffer with the LAST flag set.
return output_queue_->SendStopCommand();
} else {
// If the CAPTURE queue is not streaming, this means we received the flush
// request before the initial resolution has been established. The flush
// request will be processed in OnChangeResolutionDone(), when the CAPTURE
// queue starts streaming.
DVLOGF(2) << "Flush request to be processed after CAPTURE queue starts";
}
return true;
}
bool V4L2StatefulVideoDecoderBackend::CompleteFlush() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
DVLOGF(3);
DCHECK(flush_cb_);
// Signal that flush has properly been completed.
std::move(flush_cb_).Run(DecoderStatus::Codes::kOk);
// If CAPTURE queue is streaming, send the START command to the V4L2 device
// to signal that we are resuming decoding with the same state.
if (output_queue_->IsStreaming() && !output_queue_->SendStartCommand()) {
LOG(ERROR) << "Failed to issue START command";
std::move(flush_cb_).Run(DecoderStatus::Codes::kFailed);
client_->OnBackendError();
return false;
}
client_->CompleteFlush();
// Qualcomm venus stops capture queue after LAST buffer is dequeued and needs
// restarting to be ready for resume operation in case it was left in EOS
// state
client_->RestartStream();
// Resume decoding if data is available.
ScheduleDecodeWork();
has_pending_requests_ = false;
return true;
}
void V4L2StatefulVideoDecoderBackend::OnStreamStopped(bool stop_input_queue) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
DVLOGF(3);
// If we are resetting, also reset the splitter.
if (frame_splitter_ && stop_input_queue)
frame_splitter_->Reset();
}
void V4L2StatefulVideoDecoderBackend::ChangeResolution() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
DVLOGF(3);
// Here we just query the new resolution, visible rect, and number of output
// buffers before asking the client to update the resolution.
auto format = output_queue_->GetFormat().first;
if (!format) {
LOG(ERROR) << "Unable to get format when changing resolution.";
client_->OnBackendError();
return;
}
const gfx::Size pic_size(format->fmt.pix_mp.width, format->fmt.pix_mp.height);
auto visible_rect = output_queue_->GetVisibleRect();
if (!visible_rect) {
LOG(ERROR) << "Unable to get visible rectangle when changing resolution.";
client_->OnBackendError();
return;
}
if (!gfx::Rect(pic_size).Contains(*visible_rect)) {
LOG(ERROR) << "Visible rectangle (" << visible_rect->ToString()
<< ") is not contained by the picture rectangle ("
<< gfx::Rect(pic_size).ToString() << ").";
client_->OnBackendError();
return;
}
const auto bit_depth =
V4L2PixelFormatToBitDepth(format->fmt.pix_mp.pixelformat);
if (!bit_depth) {
LOG(ERROR) << "Unable to determine bitdepth of format ";
client_->OnBackendError();
return;
}
// Estimate the amount of buffers needed for the CAPTURE queue and for codec
// reference requirements. For VP9 and AV1, the maximum number of reference
// frames is constant and 8 (for VP8 is 4); for H.264 and other ITU-T codecs,
// it depends on the bitstream. Here we query it from the driver anyway.
constexpr size_t kDefaultNumReferenceFrames = 8;
size_t num_codec_reference_frames = kDefaultNumReferenceFrames;
// On QC Venus, this control ranges between 1 and 32 at the time of writing.
auto ctrl = device_->GetCtrl(V4L2_CID_MIN_BUFFERS_FOR_CAPTURE);
if (ctrl) {
VLOGF(2) << "V4L2_CID_MIN_BUFFERS_FOR_CAPTURE = " << ctrl->value;
num_codec_reference_frames = std::max(
base::checked_cast<size_t>(ctrl->value), num_codec_reference_frames);
}
// Verify |num_codec_reference_frames| has a reasonable value. Anecdotally 16
// is the largest amount of reference frames seen, on an ITU-T H.264 test
// vector (CAPCM*1_Sand_E.h264).
CHECK_LE(num_codec_reference_frames, 32u);
// Signal that we are flushing and initiate the resolution change.
// Our flush will be done when we receive a buffer with the LAST flag on the
// CAPTURE queue.
client_->InitiateFlush();
DCHECK(!resolution_change_cb_);
resolution_change_cb_ = base::BindOnce(
&V4L2StatefulVideoDecoderBackend::ContinueChangeResolution, weak_this_,
pic_size, *visible_rect, num_codec_reference_frames, *bit_depth);
// ...that is, unless we are not streaming yet, in which case the resolution
// change can take place immediately.
if (!output_queue_->IsStreaming())
std::move(resolution_change_cb_).Run();
}
void V4L2StatefulVideoDecoderBackend::ContinueChangeResolution(
const gfx::Size& pic_size,
const gfx::Rect& visible_rect,
const size_t num_codec_reference_frames,
const uint8_t bit_depth) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
DVLOGF(3);
// Flush is done, but stay in flushing state and ask our client to set the new
// resolution.
client_->ChangeResolution(pic_size, visible_rect, num_codec_reference_frames,
bit_depth);
}
bool V4L2StatefulVideoDecoderBackend::ApplyResolution(
const gfx::Size& pic_size,
const gfx::Rect& visible_rect) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
DVLOGF(3);
// Use the visible rect for all new frames.
visible_rect_ = visible_rect;
return true;
}
void V4L2StatefulVideoDecoderBackend::OnChangeResolutionDone(CroStatus status) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
DVLOGF(3) << "status=" << static_cast<int>(status.code());
if (status == CroStatus::Codes::kResetRequired) {
need_resume_resolution_change_ = true;
return;
}
if (status != CroStatus::Codes::kOk) {
LOG(ERROR) << "Backend failure when changing resolution ("
<< static_cast<int>(status.code()) << ").";
client_->OnBackendError();
return;
}
// Flush can be considered completed on the client side.
client_->CompleteFlush();
// Enqueue all available output buffers now that they are allocated.
EnqueueOutputBuffers();
// If we had a flush request pending before the initial resolution change,
// process it now.
if (flush_cb_) {
DVLOGF(2) << "Processing pending flush request...";
client_->InitiateFlush();
if (!output_queue_->SendStopCommand()) {
return;
}
}
// Also try to progress on our work.
DoDecodeWork();
}
void V4L2StatefulVideoDecoderBackend::ClearPendingRequests(
DecoderStatus status) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
DVLOGF(3);
if (resolution_change_cb_)
std::move(resolution_change_cb_).Run();
if (flush_cb_) {
std::move(flush_cb_).Run(status);
}
current_input_buffer_.reset();
if (current_decode_request_) {
std::move(current_decode_request_->decode_cb).Run(status);
current_decode_request_.reset();
}
while (!decode_request_queue_.empty()) {
std::move(decode_request_queue_.front().decode_cb).Run(status);
decode_request_queue_.pop();
}
has_pending_requests_ = false;
}
// TODO(b:149663704) move into helper function shared between both backends?
bool V4L2StatefulVideoDecoderBackend::IsSupportedProfile(
VideoCodecProfile profile) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
DCHECK(device_);
if (supported_profiles_.empty()) {
const std::vector<uint32_t> kSupportedInputFourccs = {
V4L2_PIX_FMT_H264,
#if BUILDFLAG(ENABLE_HEVC_PARSER_AND_HW_DECODER)
V4L2_PIX_FMT_HEVC,
#endif // BUILDFLAG(ENABLE_HEVC_PARSER_AND_HW_DECODER)
V4L2_PIX_FMT_VP8,
V4L2_PIX_FMT_VP9,
};
auto device = base::MakeRefCounted<V4L2Device>();
VideoDecodeAccelerator::SupportedProfiles profiles =
device->GetSupportedDecodeProfiles(kSupportedInputFourccs);
for (const auto& entry : profiles)
supported_profiles_.push_back(entry.profile);
}
return base::Contains(supported_profiles_, profile);
}
bool V4L2StatefulVideoDecoderBackend::StopInputQueueOnResChange() const {
return false;
}
size_t V4L2StatefulVideoDecoderBackend::GetNumOUTPUTQueueBuffers(
bool secure_mode) const {
CHECK(!secure_mode);
constexpr size_t kNumInputBuffers = 8;
return kNumInputBuffers;
}
} // namespace media
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