gstreamer/ges/ges-timeline-test-source.c

/* GStreamer Editing Services
 * Copyright (C) 2009 Edward Hervey <edward.hervey@collabora.co.uk>
 *               2009 Nokia Corporation
 *
 * 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., 51 Franklin St, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */

/**
 * SECTION:ges-timeline-test-source
 * @short_description: Render video and audio test patterns in a
 * #GESTimelineLayer
 * 
 * Useful for testing purposes or for filling gaps between media in
 * a #GESTimelineLayer.
 */

#include "ges-internal.h"
#include "ges-timeline-test-source.h"
#include "ges-timeline-source.h"
#include "ges-track-object.h"
#include "ges-track-video-test-source.h"
#include "ges-track-audio-test-source.h"
#include <string.h>

G_DEFINE_TYPE (GESTimelineTestSource, ges_timeline_test_source,
    GES_TYPE_TIMELINE_SOURCE);

struct _GESTimelineTestSourcePrivate
{
  gboolean mute;
  GESVideoTestPattern vpattern;
  gdouble freq;
  gdouble volume;
};

enum
{
  PROP_0,
  PROP_MUTE,
  PROP_VPATTERN,
  PROP_FREQ,
  PROP_VOLUME,
};

static GESTrackObject
    * ges_timeline_test_source_create_track_object (GESTimelineObject * obj,
    GESTrack * track);

static void
ges_timeline_test_source_get_property (GObject * object, guint property_id,
    GValue * value, GParamSpec * pspec)
{
  GESTimelineTestSourcePrivate *priv = GES_TIMELINE_TEST_SOURCE (object)->priv;

  switch (property_id) {
    case PROP_MUTE:
      g_value_set_boolean (value, priv->mute);
      break;
    case PROP_VPATTERN:
      g_value_set_enum (value, priv->vpattern);
      break;
    case PROP_FREQ:
      g_value_set_double (value, priv->freq);
      break;
    case PROP_VOLUME:
      g_value_set_double (value, priv->volume);
      break;
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
  }
}

static void
ges_timeline_test_source_set_property (GObject * object, guint property_id,
    const GValue * value, GParamSpec * pspec)
{
  GESTimelineTestSource *tfs = GES_TIMELINE_TEST_SOURCE (object);

  switch (property_id) {
    case PROP_MUTE:
      ges_timeline_test_source_set_mute (tfs, g_value_get_boolean (value));
      break;
    case PROP_VPATTERN:
      ges_timeline_test_source_set_vpattern (tfs, g_value_get_enum (value));
      break;
    case PROP_FREQ:
      ges_timeline_test_source_set_frequency (tfs, g_value_get_double (value));
      break;
    case PROP_VOLUME:
      ges_timeline_test_source_set_volume (tfs, g_value_get_double (value));
      break;
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
  }
}

static void
ges_timeline_test_source_class_init (GESTimelineTestSourceClass * klass)
{
  GObjectClass *object_class = G_OBJECT_CLASS (klass);
  GESTimelineObjectClass *timobj_class = GES_TIMELINE_OBJECT_CLASS (klass);

  g_type_class_add_private (klass, sizeof (GESTimelineTestSourcePrivate));

  object_class->get_property = ges_timeline_test_source_get_property;
  object_class->set_property = ges_timeline_test_source_set_property;

  /**
   * GESTimelineTestSource:vpattern:
   *
   * Video pattern to display in video track objects.
   */
  g_object_class_install_property (object_class, PROP_VPATTERN,
      g_param_spec_enum ("vpattern", "VPattern",
          "Which video pattern to display. See videotestsrc element",
          GES_VIDEO_TEST_PATTERN_TYPE,
          GES_VIDEO_TEST_PATTERN_BLACK, G_PARAM_READWRITE | G_PARAM_CONSTRUCT));

  /**
   * GESTimelineTestSource:freq:
   *
   * The frequency to generate for audio track objects.
   */
  g_object_class_install_property (object_class, PROP_FREQ,
      g_param_spec_double ("freq", "Audio Frequency",
          "The frequency to generate. See audiotestsrc element",
          0, 20000, 440, G_PARAM_READWRITE | G_PARAM_CONSTRUCT));

  /**
   * GESTimelineTestSource:volume:
   *
   * The volume for the audio track objects.
   */
  g_object_class_install_property (object_class, PROP_VOLUME,
      g_param_spec_double ("volume", "Audio Volume",
          "The volume of the test audio signal.",
          0, 1, 0, G_PARAM_READWRITE | G_PARAM_CONSTRUCT));


  /**
   * GESTimelineTestSource:mute:
   *
   * Whether the sound will be played or not.
   */
  g_object_class_install_property (object_class, PROP_MUTE,
      g_param_spec_boolean ("mute", "Mute", "Mute audio track",
          FALSE, G_PARAM_READWRITE | G_PARAM_CONSTRUCT));

  timobj_class->create_track_object =
      ges_timeline_test_source_create_track_object;
  timobj_class->need_fill_track = FALSE;
}

static void
ges_timeline_test_source_init (GESTimelineTestSource * self)
{
  self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self,
      GES_TYPE_TIMELINE_TEST_SOURCE, GESTimelineTestSourcePrivate);

  self->priv->freq = 0;
  self->priv->volume = 0;
  GES_TIMELINE_OBJECT (self)->duration = 0;
}

/**
 * ges_timeline_test_source_set_mute:
 * @self: the #GESTimelineTestSource on which to mute or unmute the audio track
 * @mute: %TRUE to mute the audio track, %FALSE to unmute it
 *
 * Sets whether the audio track of this timeline object is muted or not.
 *
 */
void
ges_timeline_test_source_set_mute (GESTimelineTestSource * self, gboolean mute)
{
  GList *tmp, *trackobjects;
  GESTimelineObject *object = (GESTimelineObject *) self;

  GST_DEBUG ("self:%p, mute:%d", self, mute);

  self->priv->mute = mute;

  /* Go over tracked objects, and update 'active' status on all audio objects */
  trackobjects = ges_timeline_object_get_track_objects (object);
  for (tmp = trackobjects; tmp; tmp = tmp->next) {
    GESTrackObject *trackobject = (GESTrackObject *) tmp->data;

    if (ges_track_object_get_track (trackobject)->type == GES_TRACK_TYPE_AUDIO)
      ges_track_object_set_active (trackobject, !mute);

    g_object_unref (GES_TRACK_OBJECT (tmp->data));
  }
  g_list_free (trackobjects);
}

/**
 * ges_timeline_test_source_set_vpattern:
 * @self: the #GESTimelineTestSource to set the pattern on
 * @vpattern: the #GESVideoTestPattern to use on @self
 *
 * Sets which video pattern to display on @self.
 *
 */
void
ges_timeline_test_source_set_vpattern (GESTimelineTestSource * self,
    GESVideoTestPattern vpattern)
{
  GList *tmp, *trackobjects;
  GESTimelineObject *object = (GESTimelineObject *) self;

  self->priv->vpattern = vpattern;

  trackobjects = ges_timeline_object_get_track_objects (object);
  for (tmp = trackobjects; tmp; tmp = tmp->next) {
    GESTrackObject *trackobject = (GESTrackObject *) tmp->data;
    if (GES_IS_TRACK_VIDEO_TEST_SOURCE (trackobject))
      ges_track_video_test_source_set_pattern (
          (GESTrackVideoTestSource *) trackobject, vpattern);

    g_object_unref (GES_TRACK_OBJECT (tmp->data));
  }
  g_list_free (trackobjects);
}

/**
 * ges_timeline_test_source_set_frequency:
 * @self: the #GESTimelineTestSource to set the frequency on
 * @freq: the frequency you want to use on @self
 *
 * Sets the frequency to generate. See audiotestsrc element.
 *
 */
void
ges_timeline_test_source_set_frequency (GESTimelineTestSource * self,
    gdouble freq)
{
  GList *tmp, *trackobjects;
  GESTimelineObject *object = (GESTimelineObject *) self;

  self->priv->freq = freq;

  trackobjects = ges_timeline_object_get_track_objects (object);
  for (tmp = trackobjects; tmp; tmp = tmp->next) {
    GESTrackObject *trackobject = (GESTrackObject *) tmp->data;
    if (GES_IS_TRACK_AUDIO_TEST_SOURCE (trackobject))
      ges_track_audio_test_source_set_freq (
          (GESTrackAudioTestSource *) trackobject, freq);

    g_object_unref (GES_TRACK_OBJECT (tmp->data));
  }
  g_list_free (trackobjects);
}

/**
 * ges_timeline_test_source_set_volume:
 * @self: the #GESTimelineTestSource to set the volume on
 * @volume: the volume of the audio signal you want to use on @self
 *
 * Sets the volume of the test audio signal.
 *
 */
void
ges_timeline_test_source_set_volume (GESTimelineTestSource * self,
    gdouble volume)
{
  GList *tmp, *trackobjects;
  GESTimelineObject *object = (GESTimelineObject *) self;

  self->priv->volume = volume;

  trackobjects = ges_timeline_object_get_track_objects (object);
  for (tmp = trackobjects; tmp; tmp = tmp->next) {
    GESTrackObject *trackobject = (GESTrackObject *) tmp->data;
    if (GES_IS_TRACK_AUDIO_TEST_SOURCE (trackobject))
      ges_track_audio_test_source_set_volume (
          (GESTrackAudioTestSource *) trackobject, volume);

    g_object_unref (GES_TRACK_OBJECT (tmp->data));
  }
  g_list_free (trackobjects);
}

/**
 * ges_timeline_test_source_get_vpattern:
 * @self: a #GESTimelineTestSource
 *
 * Get the #GESVideoTestPattern which is applied on @self.
 *
 * Returns: The #GESVideoTestPattern which is applied on @self.
 */
GESVideoTestPattern
ges_timeline_test_source_get_vpattern (GESTimelineTestSource * self)
{
  return self->priv->vpattern;
}

/**
 * ges_timeline_test_source_is_muted:
 * @self: a #GESTimelineTestSource
 *
 * Let you know if the audio track of @self is muted or not.
 *
 * Returns: Whether the audio track of @self is muted or not.
 */
gboolean
ges_timeline_test_source_is_muted (GESTimelineTestSource * self)
{
  return self->priv->mute;
}

/**
 * ges_timeline_test_source_get_frequency:
 * @self: a #GESTimelineTestSource
 *
 * Get the frequency @self generates.
 *
 * Returns: The frequency @self generates. See audiotestsrc element.
 */
gdouble
ges_timeline_test_source_get_frequency (GESTimelineTestSource * self)
{
  return self->priv->freq;
}

/**
 * ges_timeline_test_source_get_volume:
 * @self: a #GESTimelineTestSource
 *
 * Get the volume of the test audio signal applied on @self.
 *
 * Returns: The volume of the test audio signal applied on @self.
 */
gdouble
ges_timeline_test_source_get_volume (GESTimelineTestSource * self)
{
  return self->priv->volume;
}

static GESTrackObject *
ges_timeline_test_source_create_track_object (GESTimelineObject * obj,
    GESTrack * track)
{
  GESTimelineTestSourcePrivate *priv = GES_TIMELINE_TEST_SOURCE (obj)->priv;
  GESTrackObject *res = NULL;

  GST_DEBUG ("Creating a GESTrackTestSource");

  if (track->type == GES_TRACK_TYPE_VIDEO) {
    res = (GESTrackObject *) ges_track_video_test_source_new ();
    ges_track_video_test_source_set_pattern (
        (GESTrackVideoTestSource *) res, priv->vpattern);
  }

  else if (track->type == GES_TRACK_TYPE_AUDIO) {
    res = (GESTrackObject *) ges_track_audio_test_source_new ();

    if (priv->mute)
      ges_track_object_set_active (res, FALSE);

    ges_track_audio_test_source_set_freq ((GESTrackAudioTestSource *) res,
        priv->freq);
    ges_track_audio_test_source_set_volume ((GESTrackAudioTestSource *) res,
        priv->volume);
  }

  return res;
}

/**
 * ges_timeline_test_source_new:
 *
 * Creates a new #GESTimelineTestSource.
 *
 * Returns: The newly created #GESTimelineTestSource, or NULL if there was an
 * error.
 */
GESTimelineTestSource *
ges_timeline_test_source_new (void)
{
  /* FIXME : Check for validity/existence of URI */
  return g_object_new (GES_TYPE_TIMELINE_TEST_SOURCE, NULL);
}

/**
 * ges_timeline_test_source_new_for_nick:
 * @nick: the nickname for which to create the #GESTimelineTestSource
 *
 * Creates a new #GESTimelineTestSource for the provided @nick.
 *
 * Returns: The newly created #GESTimelineTestSource, or NULL if there was an
 * error.
 */
GESTimelineTestSource *
ges_timeline_test_source_new_for_nick (gchar * nick)
{
  GEnumValue *value;
  GEnumClass *klass;
  GESTimelineTestSource *ret = NULL;

  klass = G_ENUM_CLASS (g_type_class_ref (GES_VIDEO_TEST_PATTERN_TYPE));
  if (!klass)
    return NULL;

  value = g_enum_get_value_by_nick (klass, nick);
  if (value) {
    ret = g_object_new (GES_TYPE_TIMELINE_TEST_SOURCE, "vpattern",
        (gint) value->value, NULL);
  }

  g_type_class_unref (klass);
  return ret;
}