/* GSequencer - Advanced GTK Sequencer
 * Copyright (C) 2005-2017 Joël Krähemann
 *
 * This file is part of GSequencer.
 *
 * GSequencer is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * GSequencer is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with GSequencer.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <ags/audio/recall/ags_prepare_audio_signal.h>
#include <ags/audio/recall/ags_prepare_channel.h>
#include <ags/audio/recall/ags_prepare_recycling.h>

#include <ags/lib/ags_parameter.h>

#include <ags/object/ags_connectable.h>
#include <ags/object/ags_dynamic_connectable.h>
#include <ags/object/ags_soundcard.h>

#include <ags/thread/ags_mutex_manager.h>

#include <ags/audio/ags_recycling.h>
#include <ags/audio/ags_audio_signal.h>
#include <ags/audio/ags_recall_channel.h>
#include <ags/audio/ags_recall_channel_run.h>
#include <ags/audio/ags_recall_recycling.h>
#include <ags/audio/ags_audio_buffer_util.h>

void ags_prepare_audio_signal_class_init(AgsPrepareAudioSignalClass *prepare_audio_signal);
void ags_prepare_audio_signal_connectable_interface_init(AgsConnectableInterface *connectable);
void ags_prepare_audio_signal_dynamic_connectable_interface_init(AgsDynamicConnectableInterface *dynamic_connectable);
void ags_prepare_audio_signal_init(AgsPrepareAudioSignal *prepare_audio_signal);
void ags_prepare_audio_signal_connect(AgsConnectable *connectable);
void ags_prepare_audio_signal_disconnect(AgsConnectable *connectable);
void ags_prepare_audio_signal_connect_dynamic(AgsDynamicConnectable *dynamic_connectable);
void ags_prepare_audio_signal_disconnect_dynamic(AgsDynamicConnectable *dynamic_connectable);
void ags_prepare_audio_signal_finalize(GObject *gobject);

void ags_prepare_audio_signal_run_init_pre(AgsRecall *recall);
void ags_prepare_audio_signal_run_pre(AgsRecall *recall);
AgsRecall* ags_prepare_audio_signal_duplicate(AgsRecall *recall,
					      AgsRecallID *recall_id,
					      guint *n_params, GParameter *parameter);

/**
 * SECTION:ags_prepare_audio_signal
 * @short_description: prepares audio signal
 * @title: AgsPrepareAudioSignal
 * @section_id:
 * @include: ags/audio/recall/ags_prepare_audio_signal.h
 *
 * The #AgsPrepareAudioSignal class prepares the audio signal.
 */

static gpointer ags_prepare_audio_signal_parent_class = NULL;
static AgsConnectableInterface *ags_prepare_audio_signal_parent_connectable_interface;
static AgsDynamicConnectableInterface *ags_prepare_audio_signal_parent_dynamic_connectable_interface;

GType
ags_prepare_audio_signal_get_type()
{
  static GType ags_type_prepare_audio_signal = 0;

  if(!ags_type_prepare_audio_signal){
    static const GTypeInfo ags_prepare_audio_signal_info = {
      sizeof (AgsPrepareAudioSignalClass),
      NULL, /* base_init */
      NULL, /* base_finalize */
      (GClassInitFunc) ags_prepare_audio_signal_class_init,
      NULL, /* class_finalize */
      NULL, /* class_data */
      sizeof (AgsPrepareAudioSignal),
      0,    /* n_preallocs */
      (GInstanceInitFunc) ags_prepare_audio_signal_init,
    };

    static const GInterfaceInfo ags_connectable_interface_info = {
      (GInterfaceInitFunc) ags_prepare_audio_signal_connectable_interface_init,
      NULL, /* interface_finalize */
      NULL, /* interface_data */
    };

    static const GInterfaceInfo ags_dynamic_connectable_interface_info = {
      (GInterfaceInitFunc) ags_prepare_audio_signal_dynamic_connectable_interface_init,
      NULL, /* interface_finalize */
      NULL, /* interface_data */
    };

    ags_type_prepare_audio_signal = g_type_register_static(AGS_TYPE_RECALL_AUDIO_SIGNAL,
							   "AgsPrepareAudioSignal",
							   &ags_prepare_audio_signal_info,
							   0);

    g_type_add_interface_static(ags_type_prepare_audio_signal,
				AGS_TYPE_CONNECTABLE,
				&ags_connectable_interface_info);

    g_type_add_interface_static(ags_type_prepare_audio_signal,
				AGS_TYPE_DYNAMIC_CONNECTABLE,
				&ags_dynamic_connectable_interface_info);
  }

  return (ags_type_prepare_audio_signal);
}

void
ags_prepare_audio_signal_class_init(AgsPrepareAudioSignalClass *prepare_audio_signal)
{
  GObjectClass *gobject;
  AgsRecallClass *recall;
  GParamSpec *param_spec;

  ags_prepare_audio_signal_parent_class = g_type_class_peek_parent(prepare_audio_signal);

  /* GObjectClass */
  gobject = (GObjectClass *) prepare_audio_signal;

  gobject->finalize = ags_prepare_audio_signal_finalize;

  /* AgsRecallClass */
  recall = (AgsRecallClass *) prepare_audio_signal;

  recall->run_init_pre = ags_prepare_audio_signal_run_init_pre;
  recall->run_pre = ags_prepare_audio_signal_run_pre;
}

void
ags_prepare_audio_signal_connectable_interface_init(AgsConnectableInterface *connectable)
{
  ags_prepare_audio_signal_parent_connectable_interface = g_type_interface_peek_parent(connectable);

  connectable->connect = ags_prepare_audio_signal_connect;
  connectable->disconnect = ags_prepare_audio_signal_disconnect;
}

void
ags_prepare_audio_signal_dynamic_connectable_interface_init(AgsDynamicConnectableInterface *dynamic_connectable)
{
  ags_prepare_audio_signal_parent_dynamic_connectable_interface = g_type_interface_peek_parent(dynamic_connectable);

  dynamic_connectable->connect_dynamic = ags_prepare_audio_signal_connect_dynamic;
  dynamic_connectable->disconnect_dynamic = ags_prepare_audio_signal_disconnect_dynamic;
}

void
ags_prepare_audio_signal_init(AgsPrepareAudioSignal *prepare_audio_signal)
{
  AGS_RECALL(prepare_audio_signal)->name = "ags-prepare";
  AGS_RECALL(prepare_audio_signal)->version = AGS_RECALL_DEFAULT_VERSION;
  AGS_RECALL(prepare_audio_signal)->build_id = AGS_RECALL_DEFAULT_BUILD_ID;
  AGS_RECALL(prepare_audio_signal)->xml_type = "ags-prepare-audio-signal";
  AGS_RECALL(prepare_audio_signal)->port = NULL;
}

void
ags_prepare_audio_signal_finalize(GObject *gobject)
{
  /* call parent */
  G_OBJECT_CLASS(ags_prepare_audio_signal_parent_class)->finalize(gobject);

  /* empty */
}

void
ags_prepare_audio_signal_connect(AgsConnectable *connectable)
{
  /* call parent */
  ags_prepare_audio_signal_parent_connectable_interface->connect(connectable);

  /* empty */
}

void
ags_prepare_audio_signal_disconnect(AgsConnectable *connectable)
{
  /* call parent */
  ags_prepare_audio_signal_parent_connectable_interface->disconnect(connectable);

  /* empty */
}

void
ags_prepare_audio_signal_connect_dynamic(AgsDynamicConnectable *dynamic_connectable)
{
  /* call parent */
  ags_prepare_audio_signal_parent_dynamic_connectable_interface->connect_dynamic(dynamic_connectable);

  /* empty */
}

void
ags_prepare_audio_signal_disconnect_dynamic(AgsDynamicConnectable *dynamic_connectable)
{
  /* call parent */
  ags_prepare_audio_signal_parent_dynamic_connectable_interface->disconnect_dynamic(dynamic_connectable);

  /* empty */
}

void
ags_prepare_audio_signal_run_init_pre(AgsRecall *recall)
{
  GObject *soundcard;
  AgsRecycling *recycling;
  AgsAudioSignal *destination;
  AgsRecallID *parent_recall_id;
  AgsRecyclingContext *recycling_context;
  
  AgsPrepareRecycling *prepare_recycling;
  AgsPrepareAudioSignal *prepare_audio_signal;

  AgsMutexManager *mutex_manager;
  
  GList *stream;

  gdouble delay;
  guint attack;
  guint length;
  
  pthread_mutex_t *application_mutex;
  pthread_mutex_t *recycling_mutex;
  
  prepare_audio_signal = AGS_PREPARE_AUDIO_SIGNAL(recall);
  prepare_recycling = AGS_PREPARE_RECYCLING(recall->parent);

  soundcard = AGS_RECALL(prepare_audio_signal)->soundcard;

  mutex_manager = ags_mutex_manager_get_instance();
  application_mutex = ags_mutex_manager_get_application_mutex(mutex_manager);
  
  /* recycling */
  recall->flags &= (~AGS_RECALL_PERSISTENT);
  recycling = AGS_RECALL_RECYCLING(prepare_recycling)->destination;

  pthread_mutex_lock(application_mutex);

  recycling_mutex = ags_mutex_manager_lookup(mutex_manager,
					     (GObject *) recycling);
	
  pthread_mutex_unlock(application_mutex);

  /* recycling context */
  recycling_context = recall->recall_id->recycling_context;

  parent_recall_id = ags_recall_id_find_recycling_context(AGS_RECALL_CHANNEL_RUN(recall->parent->parent)->destination->recall_id,
							  recycling_context->parent);

  //TODO:JK: unclear
  attack = 0;
  delay = 0.0;

  /* create new audio signal */
  destination = ags_audio_signal_new((GObject *) soundcard,
				     (GObject *) recycling,
				     (GObject *) parent_recall_id);
  
  g_object_set(prepare_audio_signal,
	       "destination", destination,
	       NULL);  
  ags_recycling_create_audio_signal_with_defaults(recycling,
						  destination,
						  delay, attack);
  length = 1; // (guint) (2.0 * soundcard->delay[soundcard->tic_counter]) + 1;
  ags_audio_signal_stream_resize(destination,
				 length);

  ags_connectable_connect(AGS_CONNECTABLE(destination));
  
  destination->stream_current = destination->stream_beginning;

  pthread_mutex_lock(recycling_mutex);

  ags_recycling_add_audio_signal(recycling,
				 destination);

  pthread_mutex_unlock(recycling_mutex);

#ifdef AGS_DEBUG
  g_message("prepare %x to %x", destination, parent_recall_id);
  g_message("creating destination");
#endif
  
  /* call parent */
  AGS_RECALL_CLASS(ags_prepare_audio_signal_parent_class)->run_init_pre(recall);
}

void
ags_prepare_audio_signal_run_pre(AgsRecall *recall)
{
  AGS_RECALL_CLASS(ags_prepare_audio_signal_parent_class)->run_pre(recall);

  if(AGS_RECALL_AUDIO_SIGNAL(recall)->source->stream_current != NULL){
    void *buffer;

    guint buffer_size;

    buffer = (signed short *) AGS_RECALL_AUDIO_SIGNAL(recall)->destination->stream_current->data;
    buffer_size = AGS_RECALL_AUDIO_SIGNAL(recall)->destination->buffer_size;

    ags_audio_buffer_util_clear_buffer(buffer, 1,
				       buffer_size, ags_audio_buffer_util_format_from_soundcard(AGS_RECALL_AUDIO_SIGNAL(recall)->destination->format));
  }else{
    ags_recall_done(recall);
  }
}

/**
 * ags_prepare_audio_signal_new:
 * @audio_signal: an #AgsAudioSignal
 *
 * Creates an #AgsPrepareAudioSignal
 *
 * Returns: a new #AgsPrepareAudioSignal
 *
 * Since: 1.0.0.8
 */
AgsPrepareAudioSignal*
ags_prepare_audio_signal_new(AgsAudioSignal *audio_signal)
{
  AgsPrepareAudioSignal *prepare_audio_signal;

  prepare_audio_signal = (AgsPrepareAudioSignal *) g_object_new(AGS_TYPE_PREPARE_AUDIO_SIGNAL,
								NULL);

  return(prepare_audio_signal);
}
