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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 "media/mojo/services/mojo_demuxer_stream_impl.h"
#include "base/bind.h"
#include "media/base/audio_decoder_config.h"
#include "media/base/decoder_buffer.h"
#include "media/base/video_decoder_config.h"
#include "media/mojo/services/media_type_converters.h"
#include "third_party/mojo/src/mojo/public/cpp/system/data_pipe.h"
namespace media {
MojoDemuxerStreamImpl::MojoDemuxerStreamImpl(
media::DemuxerStream* stream,
mojo::InterfaceRequest<interfaces::DemuxerStream> request)
: binding_(this, request.Pass()), stream_(stream), weak_factory_(this) {}
MojoDemuxerStreamImpl::~MojoDemuxerStreamImpl() {
}
// This is called when our DemuxerStreamClient has connected itself and is
// ready to receive messages. Send an initial config and notify it that
// we are now ready for business.
void MojoDemuxerStreamImpl::Initialize(const InitializeCallback& callback) {
DVLOG(2) << __FUNCTION__;
MojoCreateDataPipeOptions options;
options.struct_size = sizeof(MojoCreateDataPipeOptions);
options.flags = MOJO_CREATE_DATA_PIPE_OPTIONS_FLAG_NONE;
options.element_num_bytes = 1;
// Allocate DataPipe sizes based on content type to reduce overhead. If this
// is still too burdensome we can adjust for sample rate or resolution.
if (stream_->type() == media::DemuxerStream::VIDEO) {
// Video can get quite large; at 4K, VP9 delivers packets which are ~1MB in
// size; so allow for 50% headroom.
options.capacity_num_bytes = 1.5 * (1024 * 1024);
} else {
// Other types don't require a lot of room, so use a smaller pipe.
options.capacity_num_bytes = 512 * 1024;
}
mojo::DataPipe data_pipe(options);
stream_pipe_ = data_pipe.producer_handle.Pass();
// Prepare the initial config.
interfaces::AudioDecoderConfigPtr audio_config;
interfaces::VideoDecoderConfigPtr video_config;
if (stream_->type() == media::DemuxerStream::AUDIO) {
audio_config =
interfaces::AudioDecoderConfig::From(stream_->audio_decoder_config());
} else if (stream_->type() == media::DemuxerStream::VIDEO) {
video_config =
interfaces::VideoDecoderConfig::From(stream_->video_decoder_config());
} else {
NOTREACHED() << "Unsupported stream type: " << stream_->type();
return;
}
callback.Run(static_cast<interfaces::DemuxerStream::Type>(stream_->type()),
data_pipe.consumer_handle.Pass(), audio_config.Pass(),
video_config.Pass());
}
void MojoDemuxerStreamImpl::Read(const ReadCallback& callback) {
stream_->Read(base::Bind(&MojoDemuxerStreamImpl::OnBufferReady,
weak_factory_.GetWeakPtr(), callback));
}
void MojoDemuxerStreamImpl::OnBufferReady(
const ReadCallback& callback,
media::DemuxerStream::Status status,
const scoped_refptr<media::DecoderBuffer>& buffer) {
interfaces::AudioDecoderConfigPtr audio_config;
interfaces::VideoDecoderConfigPtr video_config;
if (status == media::DemuxerStream::kConfigChanged) {
DVLOG(2) << __FUNCTION__ << ": ConfigChange!";
// Send the config change so our client can read it once it parses the
// Status obtained via Run() below.
if (stream_->type() == media::DemuxerStream::AUDIO) {
audio_config =
interfaces::AudioDecoderConfig::From(stream_->audio_decoder_config());
} else if (stream_->type() == media::DemuxerStream::VIDEO) {
video_config =
interfaces::VideoDecoderConfig::From(stream_->video_decoder_config());
} else {
NOTREACHED() << "Unsupported config change encountered for type: "
<< stream_->type();
}
callback.Run(interfaces::DemuxerStream::STATUS_CONFIG_CHANGED,
interfaces::DecoderBufferPtr(), audio_config.Pass(),
video_config.Pass());
return;
}
if (status == media::DemuxerStream::kAborted) {
callback.Run(interfaces::DemuxerStream::STATUS_ABORTED,
interfaces::DecoderBufferPtr(), audio_config.Pass(),
video_config.Pass());
return;
}
DCHECK_EQ(status, media::DemuxerStream::kOk);
if (!buffer->end_of_stream()) {
DCHECK_GT(buffer->data_size(), 0);
// Serialize the data section of the DecoderBuffer into our pipe.
uint32_t num_bytes = buffer->data_size();
CHECK_EQ(WriteDataRaw(stream_pipe_.get(), buffer->data(), &num_bytes,
MOJO_READ_DATA_FLAG_ALL_OR_NONE),
MOJO_RESULT_OK);
CHECK_EQ(num_bytes, static_cast<uint32_t>(buffer->data_size()));
}
// TODO(dalecurtis): Once we can write framed data to the DataPipe, fill via
// the producer handle and then read more to keep the pipe full. Waiting for
// space can be accomplished using an AsyncWaiter.
callback.Run(static_cast<interfaces::DemuxerStream::Status>(status),
interfaces::DecoderBuffer::From(buffer), audio_config.Pass(),
video_config.Pass());
}
} // namespace media
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