static void AudioOutCallback(void *buf, unsigned int _reqn, void *userdata)
{
memset(buf, 0, _reqn * PSP_NUM_AUDIO_CHANNELS);
if (_midi.status == MIDI_PLAYING) {
mid_song_read_wave(_midi.song, buf, _reqn * PSP_NUM_AUDIO_CHANNELS);
}
}
static int timidity_decode (void *void_data, char *buf, int buf_len,
struct sound_params *sound_params)
{
struct timidity_data *data = (struct timidity_data *)void_data;
sound_params->channels = midioptions.channels;
sound_params->rate = midioptions.rate;
sound_params->fmt = (midioptions.format==MID_AUDIO_S16LSB)?(SFMT_S16 | SFMT_LE):SFMT_S8;
return mid_song_read_wave(data->midisong, buf, buf_len);
}
/* generate audio data and advance internal timers */
static GstBuffer *
gst_timidity_fill_buffer (GstTimidity * timidity, GstBuffer * buffer)
{
size_t bytes_read;
gint64 samples;
bytes_read = mid_song_read_wave (timidity->song, GST_BUFFER_DATA (buffer),
GST_BUFFER_SIZE (buffer));
if (bytes_read == 0) {
gst_buffer_unref (buffer);
return NULL;
}
GST_BUFFER_OFFSET (buffer) =
timidity->o_segment->last_stop * timidity->bytes_per_frame;
GST_BUFFER_TIMESTAMP (buffer) =
timidity->o_segment->last_stop * timidity->time_per_frame;
if (bytes_read < GST_BUFFER_SIZE (buffer)) {
GstBuffer *old = buffer;
buffer = gst_buffer_create_sub (buffer, 0, bytes_read);
gst_buffer_unref (old);
}
samples = GST_BUFFER_SIZE (buffer) / timidity->bytes_per_frame;
timidity->o_segment->last_stop += samples;
GST_BUFFER_OFFSET_END (buffer) =
timidity->o_segment->last_stop * timidity->bytes_per_frame;
GST_BUFFER_DURATION (buffer) = samples * timidity->time_per_frame;
GST_DEBUG_OBJECT (timidity,
"generated buffer %" GST_TIME_FORMAT "-%" GST_TIME_FORMAT
" (%" G_GINT64_FORMAT " samples)",
GST_TIME_ARGS ((guint64) GST_BUFFER_TIMESTAMP (buffer)),
GST_TIME_ARGS (((guint64) (GST_BUFFER_TIMESTAMP (buffer) +
GST_BUFFER_DURATION (buffer)))), samples);
return buffer;
}
//private:
qint64 MidiDecoder::readData(char *data, qint64 maxlen)
{
if (d->state != QtopiaMedia::Playing)
return 0;
qint64 rc = 0;
if (maxlen > 0) {
quint32 position = (mid_song_get_time(d->song) / 1000) * 1000;
if (d->position != position) {
d->position = position;
emit positionChanged(d->position);
}
if ((rc = (qint64) mid_song_read_wave(d->song, data, maxlen)) == 0) {
seek(0);
mid_song_start(d->song);
emit playerStateChanged(d->state = QtopiaMedia::Stopped);
}
}
return rc;
}
