/* GStreamer

 *

 * gstv4ltuner.c: tuner interface implementation for V4L

 *

 * Copyright (C) 2003 Ronald Bultje <rbultje@ronald.bitfreak.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., 59 Temple Place - Suite 330,

 * Boston, MA 02111-1307, USA.

 */

#ifdef HAVE_CONFIG_H

#include "config.h"

#endif

#include <gst/gst.h>

#include "gstv4ltuner.h"

#include "gstv4lelement.h"

#include "v4l_calls.h"

static void gst_v4l_tuner_channel_class_init (GstV4lTunerChannelClass * klass);

static void gst_v4l_tuner_channel_init (GstV4lTunerChannel * channel);

static void gst_v4l_tuner_norm_class_init (GstV4lTunerNormClass * klass);

static void gst_v4l_tuner_norm_init (GstV4lTunerNorm * norm);

static const GList *gst_v4l_tuner_list_channels (GstTuner * tuner);

static void gst_v4l_tuner_set_channel (GstTuner * tuner,

    GstTunerChannel * channel);

static GstTunerChannel *gst_v4l_tuner_get_channel (GstTuner * tuner);

static const GList *gst_v4l_tuner_list_norms (GstTuner * tuner);

static void gst_v4l_tuner_set_norm (GstTuner * tuner, GstTunerNorm * norm);

static GstTunerNorm *gst_v4l_tuner_get_norm (GstTuner * tuner);

static void gst_v4l_tuner_set_frequency (GstTuner * tuner,

    GstTunerChannel * channel, gulong frequency);

static gulong gst_v4l_tuner_get_frequency (GstTuner * tuner,

    GstTunerChannel * channel);

static gint gst_v4l_tuner_signal_strength (GstTuner * tuner,

    GstTunerChannel * channel);

static GstTunerNormClass *norm_parent_class = NULL;

static GstTunerChannelClass *channel_parent_class = NULL;

GType

gst_v4l_tuner_channel_get_type (void)

{

  static GType gst_v4l_tuner_channel_type = 0;

  if (!gst_v4l_tuner_channel_type) {

    static const GTypeInfo v4l_tuner_channel_info = {

      sizeof (GstV4lTunerChannelClass),

      NULL,

      NULL,

      (GClassInitFunc) gst_v4l_tuner_channel_class_init,

      NULL,

      NULL,

      sizeof (GstV4lTunerChannel),

      0,

      (GInstanceInitFunc) gst_v4l_tuner_channel_init,

      NULL

    };

    gst_v4l_tuner_channel_type =

        g_type_register_static (GST_TYPE_TUNER_CHANNEL,

        "GstV4lTunerChannel", &v4l_tuner_channel_info, 0);

  }

  return gst_v4l_tuner_channel_type;

}

static void

gst_v4l_tuner_channel_class_init (GstV4lTunerChannelClass * klass)

{

  channel_parent_class = g_type_class_peek_parent (klass);

}

static void

gst_v4l_tuner_channel_init (GstV4lTunerChannel * channel)

{

  channel->index = 0;

  channel->audio = 0;

  channel->tuner = 0;

}

GType

gst_v4l_tuner_norm_get_type (void)

{

  static GType gst_v4l_tuner_norm_type = 0;

  if (!gst_v4l_tuner_norm_type) {

    static const GTypeInfo v4l_tuner_norm_info = {

      sizeof (GstV4lTunerNormClass),

      NULL,

      NULL,

      (GClassInitFunc) gst_v4l_tuner_norm_class_init,

      NULL,

      NULL,

      sizeof (GstV4lTunerNorm),

      0,

      (GInstanceInitFunc) gst_v4l_tuner_norm_init,

      NULL

    };

    gst_v4l_tuner_norm_type =

        g_type_register_static (GST_TYPE_TUNER_NORM,

        "GstV4lTunerNorm", &v4l_tuner_norm_info, 0);

  }

  return gst_v4l_tuner_norm_type;

}

static void

gst_v4l_tuner_norm_class_init (GstV4lTunerNormClass * klass)

{

  norm_parent_class = g_type_class_peek_parent (klass);

}

static void

gst_v4l_tuner_norm_init (GstV4lTunerNorm * norm)

{

  norm->index = 0;

}

void

gst_v4l_tuner_interface_init (GstTunerClass * klass)

{

  /* default virtual functions */

  klass->list_channels = gst_v4l_tuner_list_channels;

  klass->set_channel = gst_v4l_tuner_set_channel;

  klass->get_channel = gst_v4l_tuner_get_channel;

  klass->list_norms = gst_v4l_tuner_list_norms;

  klass->set_norm = gst_v4l_tuner_set_norm;

  klass->get_norm = gst_v4l_tuner_get_norm;

  klass->set_frequency = gst_v4l_tuner_set_frequency;

  klass->get_frequency = gst_v4l_tuner_get_frequency;

  klass->signal_strength = gst_v4l_tuner_signal_strength;

}

static G_GNUC_UNUSED gboolean

gst_v4l_tuner_contains_channel (GstV4lElement * v4lelement,

    GstV4lTunerChannel * v4lchannel)

{

  const GList *item;

  for (item = v4lelement->channels; item != NULL; item = item->next)

    if (item->data == v4lchannel)

      return TRUE;

  return FALSE;

}

static const GList *

gst_v4l_tuner_list_channels (GstTuner * tuner)

{

  return GST_V4LELEMENT (tuner)->channels;

}

static void

gst_v4l_tuner_set_channel (GstTuner * tuner, GstTunerChannel * channel)

{

  GstV4lElement *v4lelement = GST_V4LELEMENT (tuner);

  GstV4lTunerChannel *v4lchannel = GST_V4L_TUNER_CHANNEL (channel);

  gint norm;

  /* assert that we're opened and that we're using a known item */

  g_return_if_fail (GST_V4L_IS_OPEN (v4lelement));

  g_return_if_fail (gst_v4l_tuner_contains_channel (v4lelement, v4lchannel));

  gst_v4l_get_chan_norm (v4lelement, NULL, &norm);

  gst_v4l_set_chan_norm (v4lelement, v4lchannel->index, norm);

}

static GstTunerChannel *

gst_v4l_tuner_get_channel (GstTuner * tuner)

{

  GstV4lElement *v4lelement = GST_V4LELEMENT (tuner);

  GList *item;

  gint channel;

  /* assert that we're opened */

  g_return_val_if_fail (GST_V4L_IS_OPEN (v4lelement), NULL);

  gst_v4l_get_chan_norm (v4lelement, &channel, NULL);

  for (item = v4lelement->channels; item != NULL; item = item->next) {

    if (channel == GST_V4L_TUNER_CHANNEL (item->data)->index)

      return GST_TUNER_CHANNEL (item->data);

  }

  return NULL;

}

static G_GNUC_UNUSED gboolean

gst_v4l_tuner_contains_norm (GstV4lElement * v4lelement,

    GstV4lTunerNorm * v4lnorm)

{

  const GList *item;

  for (item = v4lelement->norms; item != NULL; item = item->next)

    if (item->data == v4lnorm)

      return TRUE;

  return FALSE;

}

static const GList *

gst_v4l_tuner_list_norms (GstTuner * tuner)

{

  return GST_V4LELEMENT (tuner)->norms;

}

static void

gst_v4l_tuner_set_norm (GstTuner * tuner, GstTunerNorm * norm)

{

  GstV4lElement *v4lelement = GST_V4LELEMENT (tuner);

  GstV4lTunerNorm *v4lnorm = GST_V4L_TUNER_NORM (norm);

  gint channel;

  /* assert that we're opened and that we're using a known item */

  g_return_if_fail (GST_V4L_IS_OPEN (v4lelement));

  g_return_if_fail (gst_v4l_tuner_contains_norm (v4lelement, v4lnorm));

  gst_v4l_get_chan_norm (v4lelement, &channel, NULL);

  gst_v4l_set_chan_norm (v4lelement, channel, v4lnorm->index);

}

static GstTunerNorm *

gst_v4l_tuner_get_norm (GstTuner * tuner)

{

  GstV4lElement *v4lelement = GST_V4LELEMENT (tuner);

  GList *item;

  gint norm;

  /* assert that we're opened */

  g_return_val_if_fail (GST_V4L_IS_OPEN (v4lelement), NULL);

  gst_v4l_get_chan_norm (v4lelement, NULL, &norm);

  for (item = v4lelement->norms; item != NULL; item = item->next) {

    if (norm == GST_V4L_TUNER_NORM (item->data)->index)

      return GST_TUNER_NORM (item->data);

  }

  return NULL;

}

static void

gst_v4l_tuner_set_frequency (GstTuner * tuner,

    GstTunerChannel * channel, gulong frequency)

{

  GstV4lElement *v4lelement = GST_V4LELEMENT (tuner);

  GstV4lTunerChannel *v4lchannel = GST_V4L_TUNER_CHANNEL (channel);

  gint chan;

  /* assert that we're opened and that we're using a known item */

  g_return_if_fail (GST_V4L_IS_OPEN (v4lelement));

  g_return_if_fail (GST_TUNER_CHANNEL_HAS_FLAG (channel,

          GST_TUNER_CHANNEL_FREQUENCY));

  g_return_if_fail (gst_v4l_tuner_contains_channel (v4lelement, v4lchannel));

  gst_v4l_get_chan_norm (v4lelement, &chan, NULL);

  if (chan == GST_V4L_TUNER_CHANNEL (channel)->index) {

    gst_v4l_set_frequency (v4lelement, v4lchannel->tuner, frequency);

  }

}

static gulong

gst_v4l_tuner_get_frequency (GstTuner * tuner, GstTunerChannel * channel)

{

  GstV4lElement *v4lelement = GST_V4LELEMENT (tuner);

  GstV4lTunerChannel *v4lchannel = GST_V4L_TUNER_CHANNEL (channel);

  gint chan;

  gulong frequency = 0;

  /* assert that we're opened and that we're using a known item */

  g_return_val_if_fail (GST_V4L_IS_OPEN (v4lelement), 0);

  g_return_val_if_fail (GST_TUNER_CHANNEL_HAS_FLAG (channel,

          GST_TUNER_CHANNEL_FREQUENCY), 0);

  g_return_val_if_fail (gst_v4l_tuner_contains_channel (v4lelement,

          v4lchannel), 0);

  gst_v4l_get_chan_norm (v4lelement, &chan, NULL);

  if (chan == GST_V4L_TUNER_CHANNEL (channel)->index) {

    gst_v4l_get_frequency (v4lelement, v4lchannel->tuner, &frequency);

  }

  return frequency;

}

static gint

gst_v4l_tuner_signal_strength (GstTuner * tuner, GstTunerChannel * channel)

{

  GstV4lElement *v4lelement = GST_V4LELEMENT (tuner);

  GstV4lTunerChannel *v4lchannel = GST_V4L_TUNER_CHANNEL (channel);

  gint chan;

  guint signal = 0;

  /* assert that we're opened and that we're using a known item */

  g_return_val_if_fail (GST_V4L_IS_OPEN (v4lelement), 0);

  g_return_val_if_fail (GST_TUNER_CHANNEL_HAS_FLAG (channel,

          GST_TUNER_CHANNEL_FREQUENCY), 0);

  g_return_val_if_fail (gst_v4l_tuner_contains_channel (v4lelement,

          v4lchannel), 0);

  gst_v4l_get_chan_norm (v4lelement, &chan, NULL);

  if (chan == GST_V4L_TUNER_CHANNEL (channel)->index &&

      GST_TUNER_CHANNEL_HAS_FLAG (channel, GST_TUNER_CHANNEL_FREQUENCY)) {

    gst_v4l_get_signal (v4lelement, v4lchannel->tuner, &signal);

  }

  return (gint) signal;

}