/* ALSA mixer interface implementation.

 * Copyright (C) 2003 Leif Johnson <leif@ambient.2y.net>

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Library General Public

 * License as published by the Free Software Foundation; either

 * version 2 of the License, or (at your option) any later version.

 *

 * This library 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

 * Library General Public License for more details.

 *

 * You should have received a copy of the GNU Library General Public

 * License along with this library; if not, write to the Free

 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

 */

#ifndef __GST_ALSA_MIXER_H__

#define __GST_ALSA_MIXER_H__

#include "gstalsa.h"

#include <gst/interfaces/mixer.h>

#include "gstalsamixeroptions.h"

#include "gstalsamixertrack.h"

G_BEGIN_DECLS

/* This does not get you what you think it does, use obj->mixer   */

/* #define GST_ALSA_MIXER(obj)             ((GstAlsaMixer*)(obj)) */

typedef struct _GstAlsaMixer GstAlsaMixer;

typedef enum {

  GST_ALSA_MIXER_CAPTURE = 1<<0,

  GST_ALSA_MIXER_PLAYBACK = 1<<1,

  GST_ALSA_MIXER_ALL = GST_ALSA_MIXER_CAPTURE | GST_ALSA_MIXER_PLAYBACK

} GstAlsaMixerDirection;

/**

 * GstAlsaMixer:

 *

 * Opaque data structure

 */

struct _GstAlsaMixer

{

  GList *               tracklist;      /* list of available tracks */

  snd_mixer_t *         handle;

  GstTask *		task;

  GStaticRecMutex *	task_mutex;

  GStaticRecMutex *	rec_mutex;

  int			pfd[2];

  GstMixer *		interface;

  gchar *               device;

  gchar *               cardname;

  GstAlsaMixerDirection dir;

};

GstAlsaMixer*   gst_alsa_mixer_new              (const gchar *device,

                                                 GstAlsaMixerDirection dir);

void            gst_alsa_mixer_free             (GstAlsaMixer *mixer);

const GList*    gst_alsa_mixer_list_tracks      (GstAlsaMixer * mixer);

void            gst_alsa_mixer_set_volume       (GstAlsaMixer * mixer,

                                                 GstMixerTrack * track,

                                                 gint * volumes);

void            gst_alsa_mixer_get_volume       (GstAlsaMixer * mixer,

                                                 GstMixerTrack * track,

                                                 gint * volumes);

void            gst_alsa_mixer_set_record       (GstAlsaMixer * mixer,

                                                 GstMixerTrack * track,

                                                 gboolean record);

void            gst_alsa_mixer_set_mute         (GstAlsaMixer * mixer,

                                                 GstMixerTrack * track,

                                                 gboolean mute);

void            gst_alsa_mixer_set_option       (GstAlsaMixer * mixer,

                                                 GstMixerOptions * opts,

                                                 gchar * value);

const gchar*    gst_alsa_mixer_get_option       (GstAlsaMixer * mixer,

                                                 GstMixerOptions * opts);

void		_gst_alsa_mixer_set_interface   (GstAlsaMixer * mixer,

						 GstMixer * interface);

GstMixerFlags   gst_alsa_mixer_get_mixer_flags  (GstAlsaMixer *mixer);

#define GST_IMPLEMENT_ALSA_MIXER_METHODS(Type, interface_as_function)           \

static gboolean                                                                 \

interface_as_function ## _supported (Type *this, GType iface_type)              \

{                                                                               \

  g_assert (iface_type == GST_TYPE_MIXER);                                      \

                                                                                \

  return (this->mixer != NULL);                                                 \

}                                                                               \

                                                                                \

static const GList*                                                             \

interface_as_function ## _list_tracks (GstMixer * mixer)                        \

{                                                                               \

  Type *this = (Type*) mixer;                                                   \

                                                                                \

  g_return_val_if_fail (this != NULL, NULL);                                    \

  g_return_val_if_fail (this->mixer != NULL, NULL);                             \

                                                                                \

  return gst_alsa_mixer_list_tracks (this->mixer);                              \

}                                                                               \

                                                                                \

static void                                                                     \

interface_as_function ## _set_volume (GstMixer * mixer, GstMixerTrack * track,  \

    gint * volumes)                                                             \

{                                                                               \

  Type *this = (Type*) mixer;                                                   \

                                                                                \

  g_return_if_fail (this != NULL);                                              \

  g_return_if_fail (this->mixer != NULL);                                       \

                                                                                \

  gst_alsa_mixer_set_volume (this->mixer, track, volumes);                      \

}                                                                               \

                                                                                \

static void                                                                     \

interface_as_function ## _get_volume (GstMixer * mixer, GstMixerTrack * track,  \

    gint * volumes)                                                             \

{                                                                               \

  Type *this = (Type*) mixer;                                                   \

                                                                                \

  g_return_if_fail (this != NULL);                                              \

  g_return_if_fail (this->mixer != NULL);                                       \

                                                                                \

  gst_alsa_mixer_get_volume (this->mixer, track, volumes);                      \

}                                                                               \

                                                                                \

static void                                                                     \

interface_as_function ## _set_record (GstMixer * mixer, GstMixerTrack * track,  \

    gboolean record)                                                            \

{                                                                               \

  Type *this = (Type*) mixer;                                                   \

                                                                                \

  g_return_if_fail (this != NULL);                                              \

  g_return_if_fail (this->mixer != NULL);                                       \

                                                                                \

  gst_alsa_mixer_set_record (this->mixer, track, record);                       \

}                                                                               \

                                                                                \

static void                                                                     \

interface_as_function ## _set_mute (GstMixer * mixer, GstMixerTrack * track,    \

    gboolean mute)                                                              \

{                                                                               \

  Type *this = (Type*) mixer;                                                   \

                                                                                \

  g_return_if_fail (this != NULL);                                              \

  g_return_if_fail (this->mixer != NULL);                                       \

                                                                                \

  gst_alsa_mixer_set_mute (this->mixer, track, mute);                           \

}                                                                               \

                                                                                \

static void                                                                     \

interface_as_function ## _set_option (GstMixer * mixer, GstMixerOptions * opts, \

    gchar * value)                                                              \

{                                                                               \

  Type *this = (Type*) mixer;                                                   \

                                                                                \

  g_return_if_fail (this != NULL);                                              \

  g_return_if_fail (this->mixer != NULL);                                       \

                                                                                \

  gst_alsa_mixer_set_option (this->mixer, opts, value);                         \

}                                                                               \

                                                                                \

static const gchar*                                                             \

interface_as_function ## _get_option (GstMixer * mixer, GstMixerOptions * opts) \

{                                                                               \

  Type *this = (Type*) mixer;                                                   \

                                                                                \

  g_return_val_if_fail (this != NULL, NULL);                                    \

  g_return_val_if_fail (this->mixer != NULL, NULL);                             \

                                                                                \

  return gst_alsa_mixer_get_option (this->mixer, opts);                         \

}                                                                               \

                                                                                \

static GstMixerFlags                                                            \

interface_as_function ## _get_mixer_flags (GstMixer * mixer)                    \

{                                                                               \

  Type *this = (Type*) mixer;                                                   \

                                                                                \

  g_return_val_if_fail (this != NULL, GST_MIXER_FLAG_NONE);                     \

  g_return_val_if_fail (this->mixer != NULL, GST_MIXER_FLAG_NONE);              \

                                                                                \

  return gst_alsa_mixer_get_mixer_flags (this->mixer);                          \

}                                                                               \

                                                                                \

static void                                                                     \

interface_as_function ## _interface_init (GstMixerClass * klass)                \

{                                                                               \

  GST_MIXER_TYPE (klass) = GST_MIXER_HARDWARE;                                  \

                                                                                \

  /* set up the interface hooks */                                              \

  klass->list_tracks = interface_as_function ## _list_tracks;                   \

  klass->set_volume = interface_as_function ## _set_volume;                     \

  klass->get_volume = interface_as_function ## _get_volume;                     \

  klass->set_mute = interface_as_function ## _set_mute;                         \

  klass->set_record = interface_as_function ## _set_record;                     \

  klass->set_option = interface_as_function ## _set_option;                     \

  klass->get_option = interface_as_function ## _get_option;                     \

  klass->get_mixer_flags = interface_as_function ## _get_mixer_flags;           \

}

G_END_DECLS

#endif /* __GST_ALSA_MIXER_H__ */