/* GSequencer - Advanced GTK Sequencer
 * Copyright (C) 2005-2024 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/>.
 */

#ifndef __AGS_WASAPI_DEVOUT_H__
#define __AGS_WASAPI_DEVOUT_H__

#include <glib.h>
#include <glib-object.h>

#include <ags/ags_api_config.h>

#ifdef AGS_WITH_WASAPI
#include <windows.h>
#include <tchar.h>
#include <math.h>
#include <float.h>
#include <mmdeviceapi.h>
#include <audioclient.h>
#include <avrt.h>
#include <functiondiscoverykeys_devpkey.h>
#include <winerror.h>
#endif

#include <ags/libags.h>

G_BEGIN_DECLS

#define AGS_TYPE_WASAPI_DEVOUT                (ags_wasapi_devout_get_type())
#define AGS_WASAPI_DEVOUT(obj)                (G_TYPE_CHECK_INSTANCE_CAST((obj), AGS_TYPE_WASAPI_DEVOUT, AgsWasapiDevout))
#define AGS_WASAPI_DEVOUT_CLASS(class)        (G_TYPE_CHECK_CLASS_CAST(class, AGS_TYPE_WASAPI_DEVOUT, AgsWasapiDevout))
#define AGS_IS_WASAPI_DEVOUT(obj)             (G_TYPE_CHECK_INSTANCE_TYPE ((obj), AGS_TYPE_WASAPI_DEVOUT))
#define AGS_IS_WASAPI_DEVOUT_CLASS(class)     (G_TYPE_CHECK_CLASS_TYPE ((class), AGS_TYPE_WASAPI_DEVOUT))
#define AGS_WASAPI_DEVOUT_GET_CLASS(obj)      (G_TYPE_INSTANCE_GET_CLASS(obj, AGS_TYPE_WASAPI_DEVOUT, AgsWasapiDevoutClass))

#define AGS_WASAPI_DEVOUT_GET_OBJ_MUTEX(obj) (&(((AgsWasapiDevout *) obj)->obj_mutex))

#define AGS_WASAPI_DEVOUT_DEFAULT_APP_BUFFER_SIZE (8)

#define AGS_WASAPI_DEVOUT_DEFAULT_WASAPI_BUFFER_SIZE (8192)

typedef struct _AgsWasapiDevout AgsWasapiDevout;
typedef struct _AgsWasapiDevoutClass AgsWasapiDevoutClass;

/**
 * AgsWasapiDevoutFlags:
 * @AGS_WASAPI_DEVOUT_INITIALIZED: the soundcard was initialized
 * @AGS_WASAPI_DEVOUT_START_PLAY: playback starting
 * @AGS_WASAPI_DEVOUT_PLAY: do playback
 * @AGS_WASAPI_DEVOUT_SHUTDOWN: stop playback
 * @AGS_WASAPI_DEVOUT_NONBLOCKING: do non-blocking calls
 * @AGS_WASAPI_DEVOUT_ATTACK_FIRST: use first attack, instead of second one
 * @AGS_WASAPI_DEVOUT_SHARE_MODE_EXCLUSIVE: share mode exclusive
 *
 * Enum values to control the behavior or indicate internal state of #AgsWasapiDevout by
 * enable/disable as flags.
 */
typedef enum{
  AGS_WASAPI_DEVOUT_INITIALIZED                    = 1,

  AGS_WASAPI_DEVOUT_START_PLAY                     = 1 <<  1,
  AGS_WASAPI_DEVOUT_PLAY                           = 1 <<  2,
  AGS_WASAPI_DEVOUT_SHUTDOWN                       = 1 <<  3,

  AGS_WASAPI_DEVOUT_NONBLOCKING                    = 1 <<  4,

  AGS_WASAPI_DEVOUT_ATTACK_FIRST                   = 1 <<  5,

  AGS_WASAPI_DEVOUT_SHARE_MODE_EXCLUSIVE           = 1 <<  6,
}AgsWasapiDevoutFlags;

/**
 * AgsWasapiDevoutAppBufferMode:
 * @AGS_WASAPI_DEVOUT_APP_BUFFER_0: ring-buffer 0
 * @AGS_WASAPI_DEVOUT_APP_BUFFER_1: ring-buffer 1
 * @AGS_WASAPI_DEVOUT_APP_BUFFER_2: ring-buffer 2
 * @AGS_WASAPI_DEVOUT_APP_BUFFER_3: ring-buffer 3
 * @AGS_WASAPI_DEVOUT_APP_BUFFER_4: ring-buffer 4
 * @AGS_WASAPI_DEVOUT_APP_BUFFER_5: ring-buffer 5
 * @AGS_WASAPI_DEVOUT_APP_BUFFER_6: ring-buffer 6
 * @AGS_WASAPI_DEVOUT_APP_BUFFER_7: ring-buffer 7
 * 
 * Enum values to indicate internal state of #AgsWasapiDevout application buffer by
 * setting mode.
 */
typedef enum{
  AGS_WASAPI_DEVOUT_APP_BUFFER_0,
  AGS_WASAPI_DEVOUT_APP_BUFFER_1,
  AGS_WASAPI_DEVOUT_APP_BUFFER_2,
  AGS_WASAPI_DEVOUT_APP_BUFFER_3,
  AGS_WASAPI_DEVOUT_APP_BUFFER_4,
  AGS_WASAPI_DEVOUT_APP_BUFFER_5,
  AGS_WASAPI_DEVOUT_APP_BUFFER_6,
  AGS_WASAPI_DEVOUT_APP_BUFFER_7,
}AgsWasapiDevoutAppBufferMode;

#define AGS_WASAPI_DEVOUT_ERROR (ags_wasapi_devout_error_quark())

typedef enum{
  AGS_WASAPI_DEVOUT_ERROR_LOCKED_SOUNDCARD,
  AGS_WASAPI_DEVOUT_ERROR_BROKEN_CONFIGURATION,
}AgsWasapiDevoutError;

struct _AgsWasapiDevout
{
  GObject gobject;

  AgsWasapiDevoutFlags flags;
  AgsConnectableFlags connectable_flags;

  GRecMutex obj_mutex;

  AgsUUID *uuid;

  guint dsp_channels;
  guint pcm_channels;
  AgsSoundcardFormat format;
  guint buffer_size;
  guint samplerate;

  guint wasapi_buffer_size;

  AgsWasapiDevoutAppBufferMode app_buffer_mode;

  GRecMutex **app_buffer_mutex;

  guint sub_block_count;
  GRecMutex **sub_block_mutex;

  void **app_buffer;

  gboolean use_cache;
  guint cache_buffer_size;

  guint current_cache;
  guint completed_cache;
  guint cache_offset;
  void **cache;
  
  double bpm; // beats per minute
  gdouble delay_factor;
  
  gdouble *delay; // count of tics within buffer size
  guint *attack; // where currently tic resides in the stream's offset, measured in 1/64 of bpm

  gdouble tact_counter;
  gdouble delay_counter; // next time attack changeing when delay_counter == delay
  guint tic_counter; // in the range of default period

  guint start_note_offset;
  guint note_offset;
  guint note_offset_absolute;
  
  guint loop_left;
  guint loop_right;
  gboolean do_loop;
  
  guint loop_offset;

  gchar *device;

#ifdef AGS_WITH_WASAPI
  IMMDevice *mm_device;
  IAudioClient *audio_client;
#else
  gpointer mm_device;
  gpointer audio_client;
#endif
  
  GMutex callback_mutex;
  GCond callback_cond;

  GMutex callback_finish_mutex;
  GCond callback_finish_cond;

  gdouble note_256th_delay;

  GList *note_256th_attack;

  guint note_256th_offset;
  guint note_256th_offset_last;

  guint note_256th_attack_of_16th_pulse;
  guint note_256th_attack_of_16th_pulse_position;

  gdouble note_256th_delay_counter;
};

struct _AgsWasapiDevoutClass
{
  GObjectClass gobject;
};

GType ags_wasapi_devout_get_type();
GType ags_wasapi_devout_flags_get_type();

GQuark ags_wasapi_devout_error_quark();

gboolean ags_wasapi_devout_test_flags(AgsWasapiDevout *wasapi_devout, AgsWasapiDevoutFlags flags);
void ags_wasapi_devout_set_flags(AgsWasapiDevout *wasapi_devout, AgsWasapiDevoutFlags flags);
void ags_wasapi_devout_unset_flags(AgsWasapiDevout *wasapi_devout, AgsWasapiDevoutFlags flags);

void ags_wasapi_devout_switch_buffer_flag(AgsWasapiDevout *wasapi_devout);

void ags_wasapi_devout_adjust_delay_and_attack(AgsWasapiDevout *wasapi_devout);
void ags_wasapi_devout_realloc_buffer(AgsWasapiDevout *wasapi_devout);

AgsWasapiDevout* ags_wasapi_devout_new();

G_END_DECLS

#endif /*__AGS_WASAPI_DEVOUT_H__*/