mix_audio/src/mixacpmp3.c

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*/

/**
 * SECTION:mixacpmp3
 * @short_description: Audio configuration parameters for MP3 audio.
 * @include: mixacpmp3.h
 *
 * A data object which stores audio specific parameters for MP3 audio.
 * 
 * Additional parameters must be set in the parent object #MixAudioConfigParams
 */

#include "mixacpmp3.h"

static GType _mix_acp_mp3_type = 0;
static MixAudioConfigParamsClass *parent_class = NULL;

#define _do_init { _mix_acp_mp3_type = g_define_type_id; }

gboolean mix_acp_mp3_copy(MixParams* target, const MixParams *src);
MixParams* mix_acp_mp3_dup(const MixParams *obj);
gboolean mix_acp_mp3_equal(MixParams* first, MixParams *second);
static void mix_acp_mp3_finalize(MixParams *obj);

G_DEFINE_TYPE_WITH_CODE(MixAudioConfigParamsMP3, mix_acp_mp3, MIX_TYPE_AUDIOCONFIGPARAMS, _do_init);

static void mix_acp_mp3_init (MixAudioConfigParamsMP3 *self)
{
  self->CRC=FALSE;
  self->MPEG_format=0;
  self->MPEG_layer=0;
}

static void mix_acp_mp3_class_init(MixAudioConfigParamsMP3Class *klass)
{
  MixParamsClass *mixparams_class = MIX_PARAMS_CLASS(klass);

  /* setup static parent class */
  parent_class = (MixAudioConfigParamsClass *) g_type_class_peek_parent (klass);

  mixparams_class->finalize = mix_acp_mp3_finalize;
  mixparams_class->copy = (MixParamsCopyFunction)mix_acp_mp3_copy;
  mixparams_class->dup = (MixParamsDupFunction)mix_acp_mp3_dup;
  mixparams_class->equal = (MixParamsEqualFunction)mix_acp_mp3_equal;
}

MixAudioConfigParamsMP3 *mix_acp_mp3_new(void)
{
  MixAudioConfigParamsMP3 *ret = (MixAudioConfigParamsMP3 *)g_type_create_instance (MIX_TYPE_AUDIOCONFIGPARAMSMP3);

  return ret;
}

void mix_acp_mp3_finalize(MixParams *obj)
{
  /* clean up here. */
  
  /* Chain up parent */ 
  MixParamsClass *klass = MIX_PARAMS_CLASS(parent_class);
  if (klass->finalize) 
    klass->finalize(obj);
}

MixAudioConfigParamsMP3 *mix_acp_mp3_ref(MixAudioConfigParamsMP3 *mix) 
{
  if (G_UNLIKELY(!mix)) return NULL;
  return (MixAudioConfigParamsMP3*)mix_params_ref(MIX_PARAMS(mix)); 
}

/**
 * mix_acp_mp3_dup:
 * @obj: a #MixAudioConfigParamsMP3 object
 * @returns: a newly allocated duplicate of the object.
 * 
 * Copy duplicate of the object.
 */
MixParams* mix_acp_mp3_dup(const MixParams *obj)
{
  MixParams *ret = NULL;

  if (MIX_IS_AUDIOCONFIGPARAMSMP3(obj))
  {
    MixAudioConfigParamsMP3 *duplicate = mix_acp_mp3_new();
    if (mix_acp_mp3_copy(MIX_PARAMS(duplicate), MIX_PARAMS(obj)))
    {
      ret = MIX_PARAMS(duplicate);
    }
    else
    {
      mix_acp_mp3_unref(duplicate);
    }
  }

  return ret;
}

/**
 * mix_acp_mp3_copy:
 * @target: copy to target
 * @src: copy from src
 * @returns: boolean indicates if copy is successful.
 * 
 * Copy instance data from @src to @target.
 */
gboolean mix_acp_mp3_copy(MixParams* target, const MixParams *src)
{
  if (MIX_IS_AUDIOCONFIGPARAMSMP3(target) && MIX_IS_AUDIOCONFIGPARAMSMP3(src))
  {
    MixAudioConfigParamsMP3 *t = MIX_AUDIOCONFIGPARAMSMP3(target);
    MixAudioConfigParamsMP3 *s = MIX_AUDIOCONFIGPARAMSMP3(src);

    t->CRC = s->CRC;
    t->MPEG_format = s->MPEG_format;
    t->MPEG_layer = s->MPEG_layer;

    // Now chainup base class
    MixParamsClass *klass = MIX_PARAMS_CLASS(parent_class); 
    if (klass->copy)
    {
      return klass->copy(MIX_PARAMS_CAST(target), MIX_PARAMS_CAST(src));
    }
    else
      return TRUE;
  }
  return FALSE;
}

/**
 * mix_acp_mp3_equal:
 * @first: first object to compare
 * @second: seond object to compare
 * @returns: boolean indicates if instance are equal.
 * 
 * Copy instance data from @src to @target.
 */
gboolean mix_acp_mp3_equal(MixParams* first, MixParams *second)
{
  gboolean ret = FALSE;
  
  if (first && second)
  {
    if (first == second) return TRUE;
  }
  else
  {
    return FALSE;
  }

  if (!MIX_IS_AUDIOCONFIGPARAMSMP3(first) || !MIX_IS_AUDIOCONFIGPARAMSMP3(second))
    return FALSE;

  // members within this scope equal. chaining up.
  MixParamsClass *klass = MIX_PARAMS_CLASS(parent_class);
  if (klass->equal)
    ret = klass->equal(first, second);
  else
    ret = TRUE;

  if (ret)
  {
    MixAudioConfigParamsMP3 *acp1 = MIX_AUDIOCONFIGPARAMSMP3(first);
    MixAudioConfigParamsMP3 *acp2 = MIX_AUDIOCONFIGPARAMSMP3(second);

    ret = (acp1->CRC == acp2->CRC) &&
          (acp1->MPEG_format == acp2->MPEG_format) &&
          (acp1->MPEG_layer == acp2->MPEG_layer);
  }

  return ret;
}