static gboolean
gst_audio_filter_template_setup (GstAudioFilter * filter,
const GstAudioInfo * info)
{
GstAudioFilterTemplate *filter_template;
GstAudioFormat fmt;
gint chans, rate;
filter_template = GST_AUDIO_FILTER_TEMPLATE (filter);
rate = GST_AUDIO_INFO_RATE (info);
chans = GST_AUDIO_INFO_CHANNELS (info);
fmt = GST_AUDIO_INFO_FORMAT (info);
GST_INFO_OBJECT (filter_template, "format %d (%s), rate %d, %d channels",
fmt, GST_AUDIO_INFO_NAME (info), rate, chans);
/* if any setup needs to be done (like memory allocated), do it here */
/* The audio filter base class also saves the audio info in
* GST_AUDIO_FILTER_INFO(filter) so it's automatically available
* later from there as well */
return TRUE;
}
static GstFlowReturn
gst_audio_filter_template_filter_inplace (GstBaseTransform * base_transform,
GstBuffer * buf)
{
GstAudioFilterTemplate *filter = GST_AUDIO_FILTER_TEMPLATE (base_transform);
GstFlowReturn flow = GST_FLOW_OK;
GstMapInfo map;
GST_LOG_OBJECT (filter, "transform buffer in place");
/* FIXME: do something interesting here. Doing nothing means the input
* buffer is simply pushed out as is without any modification */
if (gst_buffer_map (buf, &map, GST_MAP_READWRITE)) {
#if 0
switch (GST_AUDIO_FILTER_FORMAT (filter)) {
case GST_AUDIO_FORMAT_S16LE:
case GST_AUDIO_FORMAT_S16BE: {
gint16 *samples = map.data;
guint n_samples = map.size / sizeof (gint16);
guint i;
for (i = 0; i < n; ++n) {
samples[i] = samples[i];
}
break;
}
default:
g_warning ("Unexpected audio format %s!",
GST_AUDIO_INFO_NAME (GST_AUDIO_FILTER_INFO(filter)));
flow = GST_FLOW_ERROR;
break;
}
#endif
gst_buffer_unmap (buf, &map);
}
return flow;
}
gboolean
gst_sndio_prepare (struct gstsndio *sio, GstAudioRingBufferSpec *spec)
{
struct sio_par par, retpar;
unsigned nchannels;
GST_DEBUG_OBJECT (sio, "prepare");
if (spec->type != GST_AUDIO_RING_BUFFER_FORMAT_TYPE_RAW) {
GST_ELEMENT_ERROR (sio, RESOURCE, OPEN_READ_WRITE,
("Only raw buffer format supported by sndio"), (NULL));
return FALSE;
}
if (!GST_AUDIO_INFO_IS_INTEGER(&spec->info)) {
GST_ELEMENT_ERROR (sio, RESOURCE, OPEN_READ_WRITE,
("Only integer format supported"), (NULL));
return FALSE;
}
if (GST_AUDIO_INFO_DEPTH(&spec->info) % 8) {
GST_ELEMENT_ERROR (sio, RESOURCE, OPEN_READ_WRITE,
("Only depths multiple of 8 are supported"), (NULL));
return FALSE;
}
sio_initpar (&par);
switch (GST_AUDIO_INFO_FORMAT (&spec->info)) {
case GST_AUDIO_FORMAT_S8:
case GST_AUDIO_FORMAT_U8:
case GST_AUDIO_FORMAT_S16LE:
case GST_AUDIO_FORMAT_S16BE:
case GST_AUDIO_FORMAT_U16LE:
case GST_AUDIO_FORMAT_U16BE:
case GST_AUDIO_FORMAT_S32LE:
case GST_AUDIO_FORMAT_S32BE:
case GST_AUDIO_FORMAT_U32LE:
case GST_AUDIO_FORMAT_U32BE:
case GST_AUDIO_FORMAT_S24_32LE:
case GST_AUDIO_FORMAT_S24_32BE:
case GST_AUDIO_FORMAT_U24_32LE:
case GST_AUDIO_FORMAT_U24_32BE:
case GST_AUDIO_FORMAT_S24LE:
case GST_AUDIO_FORMAT_S24BE:
case GST_AUDIO_FORMAT_U24LE:
case GST_AUDIO_FORMAT_U24BE:
break;
default:
GST_ELEMENT_ERROR (sio, RESOURCE, OPEN_READ_WRITE,
("Unsupported audio format"),
("format = %d", GST_AUDIO_INFO_FORMAT (&spec->info)));
return FALSE;
}
par.sig = GST_AUDIO_INFO_IS_SIGNED(&spec->info);
par.bits = GST_AUDIO_INFO_WIDTH(&spec->info);
par.bps = GST_AUDIO_INFO_DEPTH(&spec->info) / 8;
if (par.bps > 1)
par.le = GST_AUDIO_INFO_IS_LITTLE_ENDIAN(&spec->info);
if (par.bits < par.bps * 8)
par.msb = 0;
par.rate = GST_AUDIO_INFO_RATE(&spec->info);
if (sio->mode == SIO_PLAY)
par.pchan = GST_AUDIO_INFO_CHANNELS(&spec->info);
else
par.rchan = GST_AUDIO_INFO_CHANNELS(&spec->info);
par.round = par.rate / 1000000. * spec->latency_time;
par.appbufsz = par.rate / 1000000. * spec->buffer_time;
if (!sio_setpar (sio->hdl, &par)) {
GST_ELEMENT_ERROR (sio, RESOURCE, OPEN_WRITE,
("Unsupported audio encoding"), (NULL));
return FALSE;
}
if (!sio_getpar (sio->hdl, &retpar)) {
GST_ELEMENT_ERROR (sio, RESOURCE, OPEN_WRITE,
("Couldn't get audio device parameters"), (NULL));
return FALSE;
}
#if 0
fprintf(stderr, "format = %s, "
"requested: sig = %d, bits = %d, bps = %d, le = %d, msb = %d, "
"rate = %d, pchan = %d, round = %d, appbufsz = %d; "
"returned: sig = %d, bits = %d, bps = %d, le = %d, msb = %d, "
"rate = %d, pchan = %d, round = %d, appbufsz = %d, bufsz = %d\n",
GST_AUDIO_INFO_NAME(&spec->info),
par.sig, par.bits, par.bps, par.le, par.msb,
par.rate, par.pchan, par.round, par.appbufsz,
retpar.sig, retpar.bits, retpar.bps, retpar.le, retpar.msb,
retpar.rate, retpar.pchan, retpar.round, retpar.appbufsz, retpar.bufsz);
#endif
if (par.bits != retpar.bits ||
par.bps != retpar.bps ||
par.rate != retpar.rate ||
(sio->mode == SIO_PLAY && par.pchan != retpar.pchan) ||
(sio->mode == SIO_REC && par.rchan != retpar.rchan) ||
(par.bps > 1 && par.le != retpar.le) ||
(par.bits < par.bps * 8 && par.msb != retpar.msb)) {
GST_ELEMENT_ERROR (sio, RESOURCE, OPEN_WRITE,
("Audio device refused requested parameters"), (NULL));
return FALSE;
}
nchannels = (sio->mode == SIO_PLAY) ? retpar.pchan : retpar.rchan;
spec->segsize = retpar.round * retpar.bps * nchannels;
spec->segtotal = retpar.bufsz / retpar.round;
sio->bpf = retpar.bps * nchannels;
sio->delay = 0;
sio_onmove (sio->hdl, gst_sndio_cb, sio);
if (!sio_start (sio->hdl)) {
GST_ELEMENT_ERROR (sio->obj, RESOURCE, OPEN_READ_WRITE,
("Could not start sndio"), (NULL));
return FALSE;
}
return TRUE;
}
