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// Copyright (c) 2012 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/filters/audio_decoder_selector.h"
#include "base/bind.h"
#include "base/callback_helpers.h"
#include "base/logging.h"
#include "base/message_loop/message_loop_proxy.h"
#include "media/base/audio_decoder_config.h"
#include "media/base/bind_to_loop.h"
#include "media/base/demuxer_stream.h"
#include "media/base/pipeline.h"
#include "media/filters/decrypting_audio_decoder.h"
#include "media/filters/decrypting_demuxer_stream.h"
namespace media {
AudioDecoderSelector::AudioDecoderSelector(
const scoped_refptr<base::MessageLoopProxy>& message_loop,
ScopedVector<AudioDecoder> decoders,
const SetDecryptorReadyCB& set_decryptor_ready_cb)
: message_loop_(message_loop),
decoders_(decoders.Pass()),
set_decryptor_ready_cb_(set_decryptor_ready_cb),
input_stream_(NULL),
weak_ptr_factory_(this) {
}
AudioDecoderSelector::~AudioDecoderSelector() {}
void AudioDecoderSelector::SelectAudioDecoder(
DemuxerStream* stream,
const StatisticsCB& statistics_cb,
const SelectDecoderCB& select_decoder_cb) {
DVLOG(2) << "SelectAudioDecoder()";
DCHECK(message_loop_->BelongsToCurrentThread());
DCHECK(stream);
// Make sure |select_decoder_cb| runs on a different execution stack.
select_decoder_cb_ = BindToCurrentLoop(select_decoder_cb);
const AudioDecoderConfig& config = stream->audio_decoder_config();
if (!config.IsValidConfig()) {
DLOG(ERROR) << "Invalid audio stream config.";
base::ResetAndReturn(&select_decoder_cb_).Run(
scoped_ptr<AudioDecoder>(), scoped_ptr<DecryptingDemuxerStream>());
return;
}
input_stream_ = stream;
statistics_cb_ = statistics_cb;
if (!config.is_encrypted()) {
InitializeDecoder(decoders_.begin());
return;
}
// This could happen if Encrypted Media Extension (EME) is not enabled.
if (set_decryptor_ready_cb_.is_null()) {
base::ResetAndReturn(&select_decoder_cb_).Run(
scoped_ptr<AudioDecoder>(), scoped_ptr<DecryptingDemuxerStream>());
return;
}
audio_decoder_.reset(new DecryptingAudioDecoder(
message_loop_, set_decryptor_ready_cb_));
audio_decoder_->Initialize(
input_stream_,
BindToCurrentLoop(base::Bind(
&AudioDecoderSelector::DecryptingAudioDecoderInitDone,
weak_ptr_factory_.GetWeakPtr())),
statistics_cb_);
}
void AudioDecoderSelector::DecryptingAudioDecoderInitDone(
PipelineStatus status) {
DCHECK(message_loop_->BelongsToCurrentThread());
if (status == PIPELINE_OK) {
base::ResetAndReturn(&select_decoder_cb_).Run(
audio_decoder_.Pass(), scoped_ptr<DecryptingDemuxerStream>());
return;
}
audio_decoder_.reset();
decrypted_stream_.reset(new DecryptingDemuxerStream(
message_loop_, set_decryptor_ready_cb_));
decrypted_stream_->Initialize(
input_stream_,
BindToCurrentLoop(base::Bind(
&AudioDecoderSelector::DecryptingDemuxerStreamInitDone,
weak_ptr_factory_.GetWeakPtr())));
}
void AudioDecoderSelector::DecryptingDemuxerStreamInitDone(
PipelineStatus status) {
DCHECK(message_loop_->BelongsToCurrentThread());
if (status != PIPELINE_OK) {
decrypted_stream_.reset();
base::ResetAndReturn(&select_decoder_cb_).Run(
scoped_ptr<AudioDecoder>(), scoped_ptr<DecryptingDemuxerStream>());
return;
}
DCHECK(!decrypted_stream_->audio_decoder_config().is_encrypted());
input_stream_ = decrypted_stream_.get();
InitializeDecoder(decoders_.begin());
}
void AudioDecoderSelector::InitializeDecoder(
ScopedVector<AudioDecoder>::iterator iter) {
DCHECK(message_loop_->BelongsToCurrentThread());
if (iter == decoders_.end()) {
base::ResetAndReturn(&select_decoder_cb_).Run(
scoped_ptr<AudioDecoder>(), scoped_ptr<DecryptingDemuxerStream>());
return;
}
(*iter)->Initialize(
input_stream_,
BindToCurrentLoop(base::Bind(
&AudioDecoderSelector::DecoderInitDone,
weak_ptr_factory_.GetWeakPtr(),
iter)),
statistics_cb_);
}
void AudioDecoderSelector::DecoderInitDone(
ScopedVector<AudioDecoder>::iterator iter, PipelineStatus status) {
DCHECK(message_loop_->BelongsToCurrentThread());
if (status != PIPELINE_OK) {
InitializeDecoder(++iter);
return;
}
scoped_ptr<AudioDecoder> audio_decoder(*iter);
decoders_.weak_erase(iter);
base::ResetAndReturn(&select_decoder_cb_).Run(audio_decoder.Pass(),
decrypted_stream_.Pass());
}
} // namespace media
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