static GstStateChangeReturn
gst_two_lame_change_state (GstElement * element, GstStateChange transition)
{
GstTwoLame *twolame;
GstStateChangeReturn result;
twolame = GST_TWO_LAME (element);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
twolame->last_flow = GST_FLOW_OK;
twolame->last_ts = GST_CLOCK_TIME_NONE;
twolame->eos_ts = GST_CLOCK_TIME_NONE;
break;
default:
break;
}
result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_NULL:
gst_two_lame_release_memory (twolame);
break;
default:
break;
}
return result;
}
static void
gst_two_lame_finalize (GObject * obj)
{
gst_two_lame_release_memory (GST_TWO_LAME (obj));
G_OBJECT_CLASS (parent_class)->finalize (obj);
}
static gboolean
gst_two_lame_stop (GstAudioEncoder * enc)
{
GstTwoLame *twolame = GST_TWO_LAME (enc);
GST_DEBUG_OBJECT (twolame, "stop");
gst_two_lame_release_memory (twolame);
return TRUE;
}
static gboolean
gst_two_lame_set_format (GstAudioEncoder * enc, GstAudioInfo * info)
{
GstTwoLame *twolame;
gint out_samplerate;
gint version;
GstCaps *othercaps;
twolame = GST_TWO_LAME (enc);
/* parameters already parsed for us */
twolame->samplerate = GST_AUDIO_INFO_RATE (info);
twolame->num_channels = GST_AUDIO_INFO_CHANNELS (info);
twolame->float_input = !GST_AUDIO_INFO_IS_INTEGER (info);
/* but we might be asked to reconfigure, so reset */
gst_two_lame_release_memory (twolame);
GST_DEBUG_OBJECT (twolame, "setting up twolame");
if (!gst_two_lame_setup (twolame))
goto setup_failed;
out_samplerate = twolame_get_out_samplerate (twolame->glopts);
if (out_samplerate == 0)
goto zero_output_rate;
if (out_samplerate != twolame->samplerate) {
GST_WARNING_OBJECT (twolame,
"output samplerate %d is different from incoming samplerate %d",
out_samplerate, twolame->samplerate);
}
version = twolame_get_version (twolame->glopts);
if (version == TWOLAME_MPEG2)
version = 2;
else
version = 1;
othercaps =
gst_caps_new_simple ("audio/mpeg",
"mpegversion", G_TYPE_INT, 1,
"mpegaudioversion", G_TYPE_INT, version,
"layer", G_TYPE_INT, 2,
"channels", G_TYPE_INT,
twolame->mode == TWOLAME_MONO ? 1 : twolame->num_channels, "rate",
G_TYPE_INT, out_samplerate, NULL);
/* and use these caps */
gst_audio_encoder_set_output_format (GST_AUDIO_ENCODER (twolame), othercaps);
gst_caps_unref (othercaps);
/* report needs to base class:
* hand one frame at a time, if we are pretty sure what a frame is */
if (out_samplerate == twolame->samplerate) {
gst_audio_encoder_set_frame_samples_min (enc, 1152);
gst_audio_encoder_set_frame_samples_max (enc, 1152);
gst_audio_encoder_set_frame_max (enc, 1);
}
return TRUE;
zero_output_rate:
{
GST_ELEMENT_ERROR (twolame, LIBRARY, SETTINGS, (NULL),
("TwoLAME decided on a zero sample rate"));
return FALSE;
}
setup_failed:
{
GST_ELEMENT_ERROR (twolame, LIBRARY, SETTINGS,
(_("Failed to configure TwoLAME encoder. Check your encoding parameters.")), (NULL));
return FALSE;
}
}
