static gboolean
gst_two_lame_sink_setcaps (GstPad * pad, GstCaps * caps)
{
GstTwoLame *twolame;
gint out_samplerate;
gint version;
GstStructure *structure;
GstCaps *othercaps;
twolame = GST_TWO_LAME (GST_PAD_PARENT (pad));
structure = gst_caps_get_structure (caps, 0);
if (strcmp (gst_structure_get_name (structure), "audio/x-raw-int") == 0)
twolame->float_input = FALSE;
else
twolame->float_input = TRUE;
if (!gst_structure_get_int (structure, "rate", &twolame->samplerate))
goto no_rate;
if (!gst_structure_get_int (structure, "channels", &twolame->num_channels))
goto no_channels;
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_pad_set_caps (twolame->srcpad, othercaps);
gst_caps_unref (othercaps);
return TRUE;
no_rate:
{
GST_ERROR_OBJECT (twolame, "input caps have no sample rate field");
return FALSE;
}
no_channels:
{
GST_ERROR_OBJECT (twolame, "input caps have no channels field");
return FALSE;
}
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;
}
}
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;
}
}