static int
midi_stream_seek (sfxstream_t *stream, int pos)
{
unsigned long int new_pos;
pos *= stream->wavinfo.width * stream->wavinfo.channels;
pos += stream->wavinfo.dataofs;
new_pos = pos;
return WildMidi_FastSeek(stream->file, &new_pos);
}
void MidiPlayerThread::seek( int secs )
{
if ( !m_midiPtr ) {
qDebug( "MidiPlayerThread::seek: WildMidi library is not initialized" );
return;
}
_WM_Info *wm_info = WildMidi_GetInfo( m_midiPtr );
qDebug() << "MidiPlayerThread::seek: current sample = " << wm_info->current_sample << ", total samples = " << wm_info->approx_total_samples;
ulong sample = ( ulong )m_sample_rate * secs + wm_info->current_sample;
qDebug() << "MidiPlayerThread::seek: secs = " << secs << ", sample = " << sample;
WildMidi_FastSeek( m_midiPtr, &sample );
}
void midiStreamCallback(void* userData, u32 requestedChunkSize, u8* chunkData)
{
LOCK();
s32 soundSize = 0;
s32 totalSize = 0;
while (totalSize < (s32)requestedChunkSize)
{
if (s_midiFormat == MFMT_GUS_PATCH)
{
soundSize = WildMidi_GetOutput(s_song, (char*)&chunkData[totalSize], requestedChunkSize-totalSize);
}
else if (s_midiFormat == MFMT_SOUND_FONT)
{
if (!s_fluidPlaying)
{
fluid_player_play( s_fluidPlayer );
fluid_player_set_loop(s_fluidPlayer, -1);
s_fluidPlaying = true;
}
soundSize = fillFluidBuffer(requestedChunkSize, chunkData, s_sampleRate, s_fluidSynth, s_fluidPlayer);
}
//we've finished the loop, start the song all over again.
if (soundSize == 0)
{
if (s_midiFormat == MFMT_GUS_PATCH)
{
unsigned long beginning = 0;
WildMidi_FastSeek(s_song, &beginning);
soundSize = WildMidi_GetOutput(s_song, (char*)&chunkData[totalSize], requestedChunkSize-totalSize);
}
else if (s_midiFormat == MFMT_SOUND_FONT)
{
LOG( LOG_ERROR, "midi synthesizer should handle looping." );
}
}
totalSize += soundSize;
};
UNLOCK();
}
static gboolean
gst_wildmidi_do_seek (GstWildmidi * wildmidi, GstEvent * event)
{
gdouble rate;
GstFormat src_format, dst_format;
GstSeekFlags flags;
GstSeekType start_type, stop_type;
gint64 start, stop;
gboolean flush, update;
#ifdef HAVE_WILDMIDI_0_2_2
gboolean accurate;
#endif
gboolean res;
unsigned long int sample;
GstSegment *segment;
if (!wildmidi->song)
return FALSE;
gst_event_parse_seek (event, &rate, &src_format, &flags,
&start_type, &start, &stop_type, &stop);
/* convert the input format to samples */
dst_format = GST_FORMAT_DEFAULT;
res = TRUE;
if (start_type != GST_SEEK_TYPE_NONE) {
res =
gst_wildmidi_src_convert (wildmidi, src_format, start, &dst_format,
&start);
}
if (res && stop_type != GST_SEEK_TYPE_NONE) {
res =
gst_wildmidi_src_convert (wildmidi, src_format, stop, &dst_format,
&stop);
}
/* unsupported format */
if (!res)
return res;
flush = ((flags & GST_SEEK_FLAG_FLUSH) == GST_SEEK_FLAG_FLUSH);
#ifdef HAVE_WILDMIDI_0_2_2
accurate = ((flags & GST_SEEK_FLAG_ACCURATE) == GST_SEEK_FLAG_ACCURATE);
#endif
if (flush) {
GST_DEBUG ("performing flush");
gst_pad_push_event (wildmidi->srcpad, gst_event_new_flush_start ());
} else {
gst_pad_stop_task (wildmidi->sinkpad);
}
segment = wildmidi->o_segment;
GST_PAD_STREAM_LOCK (wildmidi->sinkpad);
if (flush) {
gst_pad_push_event (wildmidi->srcpad, gst_event_new_flush_stop (TRUE));
}
/* update the segment now */
gst_segment_do_seek (segment, rate, dst_format, flags,
start_type, start, stop_type, stop, &update);
/* we need to seek to position in the segment now, sample will be updated */
sample = segment->position;
GST_OBJECT_LOCK (wildmidi);
#ifdef HAVE_WILDMIDI_0_2_2
if (accurate) {
WildMidi_SampledSeek (wildmidi->song, &sample);
} else {
WildMidi_FastSeek (wildmidi->song, &sample);
}
#else
WildMidi_FastSeek (wildmidi->song, &sample);
#endif
GST_OBJECT_UNLOCK (wildmidi);
segment->start = segment->time = segment->position = sample;
gst_pad_push_event (wildmidi->srcpad,
gst_wildmidi_get_new_segment_event (wildmidi, GST_FORMAT_TIME));
gst_pad_start_task (wildmidi->sinkpad,
(GstTaskFunction) gst_wildmidi_loop, wildmidi->sinkpad, NULL);
wildmidi->discont = TRUE;
GST_PAD_STREAM_UNLOCK (wildmidi->sinkpad);
GST_DEBUG ("seek done");
return TRUE;
}
