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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 "components/copresence/handlers/audio/audio_directive_handler_impl.h"
#include <algorithm>
#include <vector>
#include "base/bind.h"
#include "base/logging.h"
#include "base/memory/scoped_ptr.h"
#include "base/time/default_tick_clock.h"
#include "base/time/time.h"
#include "base/timer/timer.h"
#include "components/audio_modem/public/modem.h"
#include "components/copresence/handlers/audio/audio_directive_list.h"
#include "components/copresence/handlers/audio/tick_clock_ref_counted.h"
#include "components/copresence/proto/data.pb.h"
#include "components/copresence/public/copresence_constants.h"
#include "media/base/audio_bus.h"
using audio_modem::AUDIBLE;
using audio_modem::INAUDIBLE;
using audio_modem::TokenParameters;
namespace copresence {
namespace {
base::TimeTicks GetEarliestEventTime(AudioDirectiveList* list,
base::TimeTicks event_time) {
if (!list->GetActiveDirective())
return event_time;
return event_time.is_null() ?
list->GetActiveDirective()->end_time :
std::min(list->GetActiveDirective()->end_time, event_time);
}
void ConvertDirectives(const std::vector<AudioDirective>& in_directives,
std::vector<Directive>* out_directives) {
for (const AudioDirective& in_directive : in_directives)
out_directives->push_back(in_directive.server_directive);
}
} // namespace
// Public functions.
AudioDirectiveHandlerImpl::AudioDirectiveHandlerImpl(
const DirectivesCallback& update_directives_callback)
: update_directives_callback_(update_directives_callback),
audio_modem_(audio_modem::Modem::Create()),
audio_event_timer_(new base::OneShotTimer<AudioDirectiveHandler>),
clock_(new TickClockRefCounted(new base::DefaultTickClock)) {}
AudioDirectiveHandlerImpl::AudioDirectiveHandlerImpl(
const DirectivesCallback& update_directives_callback,
scoped_ptr<audio_modem::Modem> audio_modem,
scoped_ptr<base::Timer> timer,
const scoped_refptr<TickClockRefCounted>& clock)
: update_directives_callback_(update_directives_callback),
audio_modem_(audio_modem.Pass()),
audio_event_timer_(timer.Pass()),
clock_(clock) {}
AudioDirectiveHandlerImpl::~AudioDirectiveHandlerImpl() {}
void AudioDirectiveHandlerImpl::Initialize(
audio_modem::WhispernetClient* whispernet_client,
const audio_modem::TokensCallback& tokens_cb) {
DCHECK(audio_modem_);
audio_modem_->Initialize(whispernet_client, tokens_cb);
DCHECK(transmits_lists_.empty());
transmits_lists_.push_back(new AudioDirectiveList(clock_));
transmits_lists_.push_back(new AudioDirectiveList(clock_));
DCHECK(receives_lists_.empty());
receives_lists_.push_back(new AudioDirectiveList(clock_));
receives_lists_.push_back(new AudioDirectiveList(clock_));
}
void AudioDirectiveHandlerImpl::AddInstruction(
const Directive& directive,
const std::string& op_id) {
DCHECK(transmits_lists_.size() == 2u && receives_lists_.size() == 2u)
<< "Call Initialize() before other AudioDirectiveHandler methods";
const TokenInstruction& instruction = directive.token_instruction();
base::TimeDelta ttl =
base::TimeDelta::FromMilliseconds(directive.ttl_millis());
const size_t token_length = directive.configuration().token_params().length();
switch (instruction.token_instruction_type()) {
case TRANSMIT:
DVLOG(2) << "Audio Transmit Directive received. Token: "
<< instruction.token_id()
<< " with medium=" << instruction.medium()
<< " with TTL=" << ttl.InMilliseconds();
DCHECK_GT(token_length, 0u);
switch (instruction.medium()) {
case AUDIO_ULTRASOUND_PASSBAND:
audio_modem_->SetTokenParams(INAUDIBLE,
TokenParameters(token_length));
transmits_lists_[INAUDIBLE]->AddDirective(op_id, directive);
audio_modem_->SetToken(INAUDIBLE, instruction.token_id());
break;
case AUDIO_AUDIBLE_DTMF:
audio_modem_->SetTokenParams(AUDIBLE, TokenParameters(token_length));
transmits_lists_[AUDIBLE]->AddDirective(op_id, directive);
audio_modem_->SetToken(AUDIBLE, instruction.token_id());
break;
default:
NOTREACHED();
}
break;
case RECEIVE:
DVLOG(2) << "Audio Receive Directive received."
<< " with medium=" << instruction.medium()
<< " with TTL=" << ttl.InMilliseconds();
DCHECK_GT(token_length, 0u);
switch (instruction.medium()) {
case AUDIO_ULTRASOUND_PASSBAND:
audio_modem_->SetTokenParams(INAUDIBLE,
TokenParameters(token_length));
receives_lists_[INAUDIBLE]->AddDirective(op_id, directive);
break;
case AUDIO_AUDIBLE_DTMF:
audio_modem_->SetTokenParams(AUDIBLE, TokenParameters(token_length));
receives_lists_[AUDIBLE]->AddDirective(op_id, directive);
break;
default:
NOTREACHED();
}
break;
case UNKNOWN_TOKEN_INSTRUCTION_TYPE:
default:
LOG(WARNING) << "Unknown Audio Transmit Directive received. type = "
<< instruction.token_instruction_type();
}
ProcessNextInstruction();
}
void AudioDirectiveHandlerImpl::RemoveInstructions(const std::string& op_id) {
DCHECK(transmits_lists_.size() == 2u && receives_lists_.size() == 2u)
<< "Call Initialize() before other AudioDirectiveHandler methods";
transmits_lists_[AUDIBLE]->RemoveDirective(op_id);
transmits_lists_[INAUDIBLE]->RemoveDirective(op_id);
receives_lists_[AUDIBLE]->RemoveDirective(op_id);
receives_lists_[INAUDIBLE]->RemoveDirective(op_id);
ProcessNextInstruction();
}
const std::string AudioDirectiveHandlerImpl::PlayingToken(
audio_modem::AudioType type) const {
return audio_modem_->GetToken(type);
}
bool AudioDirectiveHandlerImpl::IsPlayingTokenHeard(
audio_modem::AudioType type) const {
return audio_modem_->IsPlayingTokenHeard(type);
}
// Private functions.
void AudioDirectiveHandlerImpl::ProcessNextInstruction() {
DCHECK(audio_event_timer_);
audio_event_timer_->Stop();
// Change |audio_modem_| state for audible transmits.
if (transmits_lists_[AUDIBLE]->GetActiveDirective())
audio_modem_->StartPlaying(AUDIBLE);
else
audio_modem_->StopPlaying(AUDIBLE);
// Change audio_modem_ state for inaudible transmits.
if (transmits_lists_[INAUDIBLE]->GetActiveDirective())
audio_modem_->StartPlaying(INAUDIBLE);
else
audio_modem_->StopPlaying(INAUDIBLE);
// Change audio_modem_ state for audible receives.
if (receives_lists_[AUDIBLE]->GetActiveDirective())
audio_modem_->StartRecording(AUDIBLE);
else
audio_modem_->StopRecording(AUDIBLE);
// Change audio_modem_ state for inaudible receives.
if (receives_lists_[INAUDIBLE]->GetActiveDirective())
audio_modem_->StartRecording(INAUDIBLE);
else
audio_modem_->StopRecording(INAUDIBLE);
base::TimeTicks next_event_time;
if (GetNextInstructionExpiry(&next_event_time)) {
audio_event_timer_->Start(
FROM_HERE,
next_event_time - clock_->NowTicks(),
base::Bind(&AudioDirectiveHandlerImpl::ProcessNextInstruction,
base::Unretained(this)));
}
// TODO(crbug.com/436584): Instead of this, store the directives
// in a single list, and prune them when expired.
if (!update_directives_callback_.is_null()) {
std::vector<Directive> directives;
ConvertDirectives(transmits_lists_[AUDIBLE]->directives(), &directives);
ConvertDirectives(transmits_lists_[INAUDIBLE]->directives(), &directives);
ConvertDirectives(receives_lists_[AUDIBLE]->directives(), &directives);
ConvertDirectives(receives_lists_[INAUDIBLE]->directives(), &directives);
update_directives_callback_.Run(directives);
}
}
bool AudioDirectiveHandlerImpl::GetNextInstructionExpiry(
base::TimeTicks* expiry) {
DCHECK(expiry);
*expiry = GetEarliestEventTime(transmits_lists_[AUDIBLE], base::TimeTicks());
*expiry = GetEarliestEventTime(transmits_lists_[INAUDIBLE], *expiry);
*expiry = GetEarliestEventTime(receives_lists_[AUDIBLE], *expiry);
*expiry = GetEarliestEventTime(receives_lists_[INAUDIBLE], *expiry);
return !expiry->is_null();
}
} // namespace copresence
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