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mojo_video_decoder.cc
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mojo_video_decoder.cc
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// Copyright 2016 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/mojo/clients/mojo_video_decoder.h"
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/callback_helpers.h"
#include "base/location.h"
#include "base/logging.h"
#include "base/single_thread_task_runner.h"
#include "media/base/decoder_buffer.h"
#include "media/base/video_frame.h"
#include "media/mojo/common/media_type_converters.h"
namespace media {
MojoVideoDecoder::MojoVideoDecoder(
scoped_refptr<base::SingleThreadTaskRunner> task_runner,
GpuVideoAcceleratorFactories* gpu_factories,
mojom::VideoDecoderPtr remote_decoder)
: task_runner_(task_runner),
gpu_factories_(gpu_factories),
remote_decoder_info_(remote_decoder.PassInterface()),
binding_(this) {
(void)gpu_factories_;
DVLOG(1) << __FUNCTION__;
}
MojoVideoDecoder::~MojoVideoDecoder() {
DVLOG(1) << __FUNCTION__;
}
std::string MojoVideoDecoder::GetDisplayName() const {
return "MojoVideoDecoder";
}
void MojoVideoDecoder::Initialize(const VideoDecoderConfig& config,
bool low_delay,
CdmContext* cdm_context,
const InitCB& init_cb,
const OutputCB& output_cb) {
DVLOG(1) << __FUNCTION__;
DCHECK(task_runner_->BelongsToCurrentThread());
DCHECK(!cdm_context);
if (!remote_decoder_bound_)
BindRemoteDecoder();
if (has_connection_error_) {
task_runner_->PostTask(FROM_HERE, base::Bind(init_cb, false));
return;
}
init_cb_ = init_cb;
output_cb_ = output_cb;
remote_decoder_->Initialize(
mojom::VideoDecoderConfig::From(config), low_delay,
base::Bind(&MojoVideoDecoder::OnInitializeDone, base::Unretained(this)));
}
// TODO(sandersd): Remove this indirection once a working decoder has been
// brought up.
void MojoVideoDecoder::OnInitializeDone(bool status) {
DVLOG(1) << __FUNCTION__;
DCHECK(task_runner_->BelongsToCurrentThread());
base::ResetAndReturn(&init_cb_).Run(status);
}
void MojoVideoDecoder::Decode(const scoped_refptr<DecoderBuffer>& buffer,
const DecodeCB& decode_cb) {
DVLOG(1) << __FUNCTION__;
DCHECK(task_runner_->BelongsToCurrentThread());
if (has_connection_error_) {
task_runner_->PostTask(FROM_HERE,
base::Bind(decode_cb, DecodeStatus::DECODE_ERROR));
return;
}
mojom::DecoderBufferPtr mojo_buffer = mojom::DecoderBuffer::From(buffer);
// TODO(sandersd): Destruct cleanly on error.
if (!buffer->end_of_stream()) {
uint32_t data_size = base::checked_cast<uint32_t>(buffer->data_size());
DCHECK_GT(data_size, 0u);
uint32_t bytes_written = data_size;
CHECK_EQ(WriteDataRaw(decoder_buffer_pipe_.get(), buffer->data(),
&bytes_written, MOJO_READ_DATA_FLAG_ALL_OR_NONE),
MOJO_RESULT_OK);
CHECK_EQ(bytes_written, data_size);
}
// TODO(sandersd): Support more than one decode at a time.
decode_cb_ = decode_cb;
remote_decoder_->Decode(
std::move(mojo_buffer),
base::Bind(&MojoVideoDecoder::OnDecodeDone, base::Unretained(this)));
}
void MojoVideoDecoder::OnVideoFrameDecoded(mojom::VideoFramePtr frame) {
DVLOG(1) << __FUNCTION__;
DCHECK(task_runner_->BelongsToCurrentThread());
output_cb_.Run(frame.To<scoped_refptr<VideoFrame>>());
}
void MojoVideoDecoder::OnDecodeDone(mojom::DecodeStatus status) {
DVLOG(1) << __FUNCTION__;
DCHECK(task_runner_->BelongsToCurrentThread());
base::ResetAndReturn(&decode_cb_).Run(static_cast<DecodeStatus>(status));
}
void MojoVideoDecoder::Reset(const base::Closure& reset_cb) {
DVLOG(1) << __FUNCTION__;
DCHECK(task_runner_->BelongsToCurrentThread());
if (has_connection_error_) {
task_runner_->PostTask(FROM_HERE, reset_cb);
return;
}
reset_cb_ = reset_cb;
remote_decoder_->Reset(
base::Bind(&MojoVideoDecoder::OnResetDone, base::Unretained(this)));
}
void MojoVideoDecoder::OnResetDone() {
DVLOG(1) << __FUNCTION__;
DCHECK(task_runner_->BelongsToCurrentThread());
base::ResetAndReturn(&reset_cb_).Run();
}
bool MojoVideoDecoder::NeedsBitstreamConversion() const {
DVLOG(1) << __FUNCTION__;
return false;
}
bool MojoVideoDecoder::CanReadWithoutStalling() const {
DVLOG(1) << __FUNCTION__;
return true;
}
int MojoVideoDecoder::GetMaxDecodeRequests() const {
DVLOG(1) << __FUNCTION__;
return 1;
}
void MojoVideoDecoder::BindRemoteDecoder() {
DVLOG(1) << __FUNCTION__;
DCHECK(task_runner_->BelongsToCurrentThread());
DCHECK(!remote_decoder_bound_);
remote_decoder_.Bind(std::move(remote_decoder_info_));
remote_decoder_bound_ = true;
if (remote_decoder_.encountered_error()) {
has_connection_error_ = true;
return;
}
remote_decoder_.set_connection_error_handler(
base::Bind(&MojoVideoDecoder::OnConnectionError, base::Unretained(this)));
// TODO(sandersd): Better buffer sizing.
MojoCreateDataPipeOptions options;
options.struct_size = sizeof(options);
options.flags = MOJO_CREATE_DATA_PIPE_OPTIONS_FLAG_NONE;
options.element_num_bytes = 1;
options.capacity_num_bytes = 2 * 1024 * 1024;
mojo::DataPipe decoder_buffer_pipe(options);
decoder_buffer_pipe_ = std::move(decoder_buffer_pipe.producer_handle);
remote_decoder_->Construct(binding_.CreateInterfacePtrAndBind(),
std::move(decoder_buffer_pipe.consumer_handle));
}
void MojoVideoDecoder::OnConnectionError() {
DVLOG(1) << __FUNCTION__;
DCHECK(task_runner_->BelongsToCurrentThread());
has_connection_error_ = true;
// TODO(sandersd): Write a wrapper class (like BindToCurrentLoop) that handles
// the lifetime of callbacks like this.
if (!init_cb_.is_null())
base::ResetAndReturn(&init_cb_).Run(false);
// TODO(sandersd): If there is a pending reset, should these be aborted?
if (!decode_cb_.is_null())
base::ResetAndReturn(&decode_cb_).Run(DecodeStatus::DECODE_ERROR);
if (!reset_cb_.is_null())
base::ResetAndReturn(&reset_cb_).Run();
}
} // namespace media