path: root/src/components/media_manager/src/audio/a2dp_source_player_adapter.cc

/*
 * Copyright (c) 2014, Ford Motor Company
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following
 * disclaimer in the documentation and/or other materials provided with the
 * distribution.
 *
 * Neither the name of the Ford Motor Company nor the names of its contributors
 * may be used to endorse or promote products derived from this software
 * without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */
#include <net/if.h>
#include <pulse/simple.h>
#include <pulse/error.h>
#include <string.h>
#include <utility>
#include "utils/threads/thread.h"
#include "media_manager/audio/a2dp_source_player_adapter.h"
#include "utils/lock.h"
#include "utils/logger.h"
#include "connection_handler/connection_handler_impl.h"
#include "protocol_handler/session_observer.h"

namespace media_manager {

CREATE_LOGGERPTR_GLOBAL(logger_, "MediaManager")

const static size_t BUFSIZE = 32;

class A2DPSourcePlayerAdapter::A2DPSourcePlayerThread
    : public threads::ThreadDelegate {
 public:
  explicit A2DPSourcePlayerThread(const std::string& device);

  void threadMain();

  void exitThreadMain();

 private:
  // The Sample format to use
  static const pa_sample_spec sSampleFormat_;

  pa_simple* s_in, *s_out;
  std::string device_;
  bool should_be_stopped_;
  sync_primitives::Lock should_be_stopped_lock_;

  void freeStreams();

  DISALLOW_COPY_AND_ASSIGN(A2DPSourcePlayerThread);
};

A2DPSourcePlayerAdapter::A2DPSourcePlayerAdapter(
    protocol_handler::SessionObserver& session_observer)
    : session_observer_(session_observer) {}

A2DPSourcePlayerAdapter::~A2DPSourcePlayerAdapter() {
  for (SourcesMap::iterator it = sources_.begin(); sources_.end() != it; ++it) {
    Pair pair = it->second;
    pair.first->join();
    delete pair.second;
    threads::DeleteThread(pair.first);
  }
  sources_.clear();
}

void A2DPSourcePlayerAdapter::StartActivity(int32_t application_key) {
  LOG4CXX_INFO(logger_,
               "Starting a2dp playing music for " << application_key
                                                  << " application.");
  if (application_key != current_application_) {
    current_application_ = application_key;

    transport_manager::DeviceHandle device_id = 0;
    session_observer_.GetDataOnSessionKey(application_key, 0, NULL, &device_id);
    std::string mac_address;
    session_observer_.GetDataOnDeviceID(device_id, NULL, NULL, &mac_address);

    // TODO(PK): Convert mac_address to the
    // following format : "bluez_source.XX_XX_XX_XX_XX_XX" if needed
    // before passing to the A2DPSourcePlayerThread constructor

    A2DPSourcePlayerThread* delegate =
        new A2DPSourcePlayerAdapter::A2DPSourcePlayerThread(mac_address);
    threads::Thread* new_activity =
        threads::CreateThread(mac_address.c_str(), delegate);
    sources_[application_key] = Pair(new_activity, delegate);
    new_activity->start();
  }
}

void A2DPSourcePlayerAdapter::StopActivity(int32_t application_key) {
  LOG4CXX_INFO(logger_,
               "Stopping 2dp playing for " << application_key
                                           << " application.");
  if (application_key != current_application_) {
    return;
  }
  SourcesMap::iterator it = sources_.find(application_key);
  if (sources_.end() != it) {
    Pair pair = it->second;
    pair.first->join();
    delete pair.second;
    threads::DeleteThread(pair.first);
    current_application_ = 0;
  }
}

bool A2DPSourcePlayerAdapter::is_app_performing_activity(
    int32_t application_key) const {
  return (application_key == current_application_);
}

const pa_sample_spec
    A2DPSourcePlayerAdapter::A2DPSourcePlayerThread::sSampleFormat_ = {
        /*format*/ PA_SAMPLE_S16LE,
        /*rate*/ 44100,
        /*channels*/ 2};

A2DPSourcePlayerAdapter::A2DPSourcePlayerThread::A2DPSourcePlayerThread(
    const std::string& device)
    : threads::ThreadDelegate(), device_(device) {}

void A2DPSourcePlayerAdapter::A2DPSourcePlayerThread::freeStreams() {
  LOG4CXX_INFO(logger_, "Free streams in A2DPSourcePlayerThread.");
  if (s_in) {
    pa_simple_free(s_in);
  }

  if (s_out) {
    pa_simple_free(s_out);
  }
}

void A2DPSourcePlayerAdapter::A2DPSourcePlayerThread::exitThreadMain() {
  sync_primitives::AutoLock auto_lock(should_be_stopped_lock_);
  should_be_stopped_ = true;
}

void A2DPSourcePlayerAdapter::A2DPSourcePlayerThread::threadMain() {
  LOG4CXX_INFO(logger_, "Main thread of A2DPSourcePlayerThread.");

  {
    sync_primitives::AutoLock auto_lock(should_be_stopped_lock_);
    should_be_stopped_ = false;
  }

  int32_t error;

  const char* a2dpSource = device_.c_str();

  LOG4CXX_DEBUG(logger_, device_);

  LOG4CXX_DEBUG(logger_, "Creating streams");

  /* Create a new playback stream */
  if (!(s_out = pa_simple_new(NULL,
                              "AudioManager",
                              PA_STREAM_PLAYBACK,
                              NULL,
                              "playback",
                              &sSampleFormat_,
                              NULL,
                              NULL,
                              &error))) {
    LOG4CXX_ERROR(logger_, "pa_simple_new() failed: " << pa_strerror(error));
    freeStreams();
    return;
  }

  if (!(s_in = pa_simple_new(NULL,
                             "AudioManager",
                             PA_STREAM_RECORD,
                             a2dpSource,
                             "record",
                             &sSampleFormat_,
                             NULL,
                             NULL,
                             &error))) {
    LOG4CXX_ERROR(logger_, "pa_simple_new() failed: " << pa_strerror(error));
    freeStreams();
    return;
  }

  LOG4CXX_DEBUG(logger_, "Entering main loop");

  for (;;) {
    uint8_t buf[BUFSIZE];

    pa_usec_t latency;

    if ((latency = pa_simple_get_latency(s_in, &error)) == (pa_usec_t)-1) {
      LOG4CXX_ERROR(logger_,
                    "pa_simple_get_latency() failed: " << pa_strerror(error));
      break;
    }

    // LOG4CXX_INFO(logger_, "In: " << static_cast<float>(latency));

    if ((latency = pa_simple_get_latency(s_out, &error)) == (pa_usec_t)-1) {
      LOG4CXX_ERROR(logger_,
                    "pa_simple_get_latency() failed: " << pa_strerror(error));
      break;
    }

    // LOG4CXX_INFO(logger_, "Out: " << static_cast<float>(latency));

    if (pa_simple_read(s_in, buf, sizeof(buf), &error) < 0) {
      LOG4CXX_ERROR(logger_, "read() failed: " << strerror(error));
      break;
    }

    /* ... and play it */
    if (pa_simple_write(s_out, buf, sizeof(buf), &error) < 0) {
      LOG4CXX_ERROR(logger_,
                    "pa_simple_write() failed: " << pa_strerror(error));
      break;
    }

    bool should_be_stopped;
    {
      // FIXME (dchmerev@luxoft.com): Remove these insane blockings
      sync_primitives::AutoLock auto_lock(should_be_stopped_lock_);
      should_be_stopped = should_be_stopped_;
    }

    if (should_be_stopped) {
      break;
    }
  }

  /* Make sure that every single sample was played */
  if (pa_simple_drain(s_out, &error) < 0) {
    LOG4CXX_ERROR(logger_, "pa_simple_drain() failed: " << pa_strerror(error));
    freeStreams();
    return;
  }

  freeStreams();
}

}  // namespace media_manager