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;
}
}
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;
}
}
// Print the library version and
// encoder parameter settings to STDERR
void twolame_print_config(twolame_options *glopts)
{
FILE* fd = stderr;
// Are we being silent ?
if (glopts->verbosity<=0) return;
// Are we being brief ?
if (glopts->verbosity==1) {
fprintf(fd, "LibTwoLame version %s (%s)\n", get_twolame_version(), get_twolame_url());
fprintf (fd, "Encoding as %dHz, ", twolame_get_out_samplerate(glopts));
fprintf (fd, "%d kbps, ", twolame_get_bitrate(glopts) );
if (twolame_get_VBR(glopts)) fprintf (fd, "VBR, " );
else fprintf (fd, "CBR, " );
fprintf (fd, "%s Layer II\n", twolame_get_version_name(glopts));
} else {
fprintf (fd, "---------------------------------------------------------\n");
fprintf (fd, "LibTwoLame %s (%s)\n", get_twolame_version(), get_twolame_url());
fprintf (fd, "Input : %d Hz, %d channels\n",
twolame_get_in_samplerate(glopts),
twolame_get_num_channels(glopts));
fprintf (fd, "Output: %d Hz, %s\n",
twolame_get_out_samplerate(glopts),
twolame_get_mode_name(glopts));
fprintf (fd, "%d kbps ", twolame_get_bitrate(glopts) );
if (twolame_get_VBR(glopts)) fprintf (fd, "VBR " );
else fprintf (fd, "CBR " );
fprintf (fd, "%s Layer II ", twolame_get_version_name(glopts));
fprintf (fd, "psycho model=%d \n", twolame_get_psymodel(glopts));
fprintf (fd, "[De-emph:%s Copyright:%s Original:%s]\n",
((twolame_get_emphasis(glopts)) ? "On " : "Off"),
((twolame_get_copyright(glopts)) ? "Yes" : "No "),
((twolame_get_original(glopts)) ? "Yes" : "No "));
fprintf (fd, "[Padding:%s CRC:%s DAB:%s ]\n",
((twolame_get_padding(glopts)) ? "Normal" : "Off "),
((twolame_get_error_protection(glopts)) ? "On " : "Off"),
((twolame_get_DAB(glopts)) ? "On " : "Off"));
if (glopts->verbosity>=3) {
if (twolame_get_VBR(glopts)) {
fprintf (fd, " - VBR Enabled. Using MNR boost of %f\n", twolame_get_VBR_level(glopts));
fprintf (fd, " - VBR bitrate index limits [%i -> %i]\n", glopts->lower_index, glopts->upper_index);
}
fprintf(fd," - ATH adjustment %f\n", twolame_get_ATH_level(glopts));
fprintf(fd," - Reserving %i Ancillary bits\n", twolame_get_num_ancillary_bits(glopts));
if (twolame_get_scale(glopts)!=1.0f)
fprintf(fd," - Scaling audio by %f\n", twolame_get_scale(glopts));
if (twolame_get_scale_left(glopts)!=1.0f)
fprintf(fd," - Scaling left channel by %f\n", twolame_get_scale_left(glopts));
if (twolame_get_scale_right(glopts)!=1.0f)
fprintf(fd," - Scaling right channel by %f\n", twolame_get_scale_right(glopts));
//if (glopts->num_channels_in == 2 && glopts->num_channels_out == 1 ) {
// fprintf(fd, " - Downmixing from stereo to mono.\n");
//} else if (glopts->num_channels_in == 1 && glopts->num_channels_out == 2 ) {
// fprintf(fd, " - Upmixing from mono to stereo.\n");
//}
}
fprintf (fd, "---------------------------------------------------------\n");
}
}