static void
gst_speex_dec_init (GstSpeexDec * dec, GstSpeexDecClass * g_class)
{
dec->enh = DEFAULT_ENH;
gst_speex_dec_reset (dec);
}
static GstStateChangeReturn
speex_dec_change_state (GstElement * element, GstStateChange transition)
{
GstStateChangeReturn ret;
GstSpeexDec *dec = GST_SPEEX_DEC (element);
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
case GST_STATE_CHANGE_READY_TO_PAUSED:
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
default:
break;
}
ret = parent_class->change_state (element, transition);
if (ret != GST_STATE_CHANGE_SUCCESS)
return ret;
switch (transition) {
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_speex_dec_reset (dec);
break;
case GST_STATE_CHANGE_READY_TO_NULL:
break;
default:
break;
}
return ret;
}
static void
gst_speex_dec_init (GstSpeexDec * dec, GstSpeexDecClass * g_class)
{
dec->sinkpad =
gst_pad_new_from_static_template (&speex_dec_sink_factory, "sink");
gst_pad_set_chain_function (dec->sinkpad,
GST_DEBUG_FUNCPTR (speex_dec_chain));
gst_pad_set_event_function (dec->sinkpad,
GST_DEBUG_FUNCPTR (speex_dec_sink_event));
gst_pad_set_query_type_function (dec->sinkpad,
GST_DEBUG_FUNCPTR (speex_get_sink_query_types));
gst_pad_set_query_function (dec->sinkpad,
GST_DEBUG_FUNCPTR (speex_dec_sink_query));
gst_element_add_pad (GST_ELEMENT (dec), dec->sinkpad);
dec->srcpad =
gst_pad_new_from_static_template (&speex_dec_src_factory, "src");
gst_pad_use_fixed_caps (dec->srcpad);
gst_pad_set_event_function (dec->srcpad,
GST_DEBUG_FUNCPTR (speex_dec_src_event));
gst_pad_set_query_type_function (dec->srcpad,
GST_DEBUG_FUNCPTR (speex_get_src_query_types));
gst_pad_set_query_function (dec->srcpad,
GST_DEBUG_FUNCPTR (speex_dec_src_query));
gst_element_add_pad (GST_ELEMENT (dec), dec->srcpad);
dec->enh = DEFAULT_ENH;
gst_speex_dec_reset (dec);
}
static gboolean
gst_speex_dec_stop (GstAudioDecoder * dec)
{
GstSpeexDec *sd = GST_SPEEX_DEC (dec);
GST_DEBUG_OBJECT (dec, "stop");
gst_speex_dec_reset (sd);
return TRUE;
}
static void
gst_speex_dec_init (GstSpeexDec * dec)
{
gst_audio_decoder_set_needs_format (GST_AUDIO_DECODER (dec), TRUE);
gst_audio_decoder_set_use_default_pad_acceptcaps (GST_AUDIO_DECODER_CAST
(dec), TRUE);
GST_PAD_SET_ACCEPT_TEMPLATE (GST_AUDIO_DECODER_SINK_PAD (dec));
dec->enh = DEFAULT_ENH;
gst_speex_dec_reset (dec);
}
static gboolean
gst_speex_dec_start (GstAudioDecoder * dec)
{
GstSpeexDec *sd = GST_SPEEX_DEC (dec);
GST_DEBUG_OBJECT (dec, "start");
gst_speex_dec_reset (sd);
/* we know about concealment */
gst_audio_decoder_set_plc_aware (dec, TRUE);
return TRUE;
}
static GstFlowReturn
gst_speex_dec_parse_header (GstSpeexDec * dec, GstBuffer * buf)
{
SpeexHeader *header;
GstMapInfo map;
GstAudioInfo info;
static const GstAudioChannelPosition chan_pos[2][2] = {
{GST_AUDIO_CHANNEL_POSITION_MONO},
{GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT}
};
/* get the header */
gst_buffer_map (buf, &map, GST_MAP_READ);
header = speex_packet_to_header ((gchar *) map.data, map.size);
gst_buffer_unmap (buf, &map);
if (!header)
goto no_header;
if (dec->header) {
GST_DEBUG_OBJECT (dec, "Replacing speex-header, resetting state");
gst_speex_dec_reset (dec);
}
dec->header = header;
if (dec->header->mode >= SPEEX_NB_MODES || dec->header->mode < 0)
goto mode_too_old;
dec->mode = speex_lib_get_mode (dec->header->mode);
/* initialize the decoder */
dec->state = speex_decoder_init (dec->mode);
if (!dec->state)
goto init_failed;
speex_decoder_ctl (dec->state, SPEEX_SET_ENH, &dec->enh);
speex_decoder_ctl (dec->state, SPEEX_GET_FRAME_SIZE, &dec->frame_size);
if (dec->header->nb_channels != 1) {
dec->stereo = speex_stereo_state_init ();
dec->callback.callback_id = SPEEX_INBAND_STEREO;
dec->callback.func = speex_std_stereo_request_handler;
dec->callback.data = dec->stereo;
speex_decoder_ctl (dec->state, SPEEX_SET_HANDLER, &dec->callback);
}
speex_decoder_ctl (dec->state, SPEEX_SET_SAMPLING_RATE, &dec->header->rate);
dec->frame_duration = gst_util_uint64_scale_int (dec->frame_size,
GST_SECOND, dec->header->rate);
speex_bits_init (&dec->bits);
/* set caps */
gst_audio_info_init (&info);
gst_audio_info_set_format (&info,
GST_AUDIO_FORMAT_S16,
dec->header->rate,
dec->header->nb_channels, chan_pos[dec->header->nb_channels - 1]);
if (!gst_audio_decoder_set_output_format (GST_AUDIO_DECODER (dec), &info))
goto nego_failed;
return GST_FLOW_OK;
/* ERRORS */
no_header:
{
GST_INFO_OBJECT (dec, "couldn't read header");
return GST_FLOW_NO_HEADER;
}
mode_too_old:
{
GST_ELEMENT_ERROR (GST_ELEMENT (dec), STREAM, DECODE,
(NULL),
("Mode number %d does not (yet/any longer) exist in this version",
dec->header->mode));
return GST_FLOW_ERROR;
}
init_failed:
{
GST_ELEMENT_ERROR (GST_ELEMENT (dec), STREAM, DECODE,
(NULL), ("couldn't initialize decoder"));
return GST_FLOW_ERROR;
}
nego_failed:
{
GST_ELEMENT_ERROR (GST_ELEMENT (dec), STREAM, DECODE,
(NULL), ("couldn't negotiate format"));
return GST_FLOW_NOT_NEGOTIATED;
}
}
