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;
}
static gboolean
gst_wavenc_sink_setcaps (GstPad * pad, GstCaps * caps)
{
GstWavEnc *wavenc;
GstStructure *structure;
const gchar *name;
gint chans, rate;
GstCaps *ccaps;
wavenc = GST_WAVENC (gst_pad_get_parent (pad));
ccaps = gst_pad_get_current_caps (pad);
if (wavenc->sent_header && ccaps && !gst_caps_can_intersect (caps, ccaps)) {
gst_caps_unref (ccaps);
GST_WARNING_OBJECT (wavenc, "cannot change format in middle of stream");
goto fail;
}
if (ccaps)
gst_caps_unref (ccaps);
GST_DEBUG_OBJECT (wavenc, "got caps: %" GST_PTR_FORMAT, caps);
structure = gst_caps_get_structure (caps, 0);
name = gst_structure_get_name (structure);
if (!gst_structure_get_int (structure, "channels", &chans) ||
!gst_structure_get_int (structure, "rate", &rate)) {
GST_WARNING_OBJECT (wavenc, "caps incomplete");
goto fail;
}
if (strcmp (name, "audio/x-raw") == 0) {
GstAudioInfo info;
if (!gst_audio_info_from_caps (&info, caps))
goto fail;
if (GST_AUDIO_INFO_IS_INTEGER (&info))
wavenc->format = GST_RIFF_WAVE_FORMAT_PCM;
else if (GST_AUDIO_INFO_IS_FLOAT (&info))
wavenc->format = GST_RIFF_WAVE_FORMAT_IEEE_FLOAT;
else
goto fail;
wavenc->width = GST_AUDIO_INFO_WIDTH (&info);
} else if (strcmp (name, "audio/x-alaw") == 0) {
wavenc->format = GST_RIFF_WAVE_FORMAT_ALAW;
wavenc->width = 8;
} else if (strcmp (name, "audio/x-mulaw") == 0) {
wavenc->format = GST_RIFF_WAVE_FORMAT_MULAW;
wavenc->width = 8;
} else {
GST_WARNING_OBJECT (wavenc, "Unsupported format %s", name);
goto fail;
}
wavenc->channels = chans;
wavenc->rate = rate;
GST_LOG_OBJECT (wavenc,
"accepted caps: format=0x%04x chans=%u width=%u rate=%u",
wavenc->format, wavenc->channels, wavenc->width, wavenc->rate);
gst_object_unref (wavenc);
return TRUE;
fail:
gst_object_unref (wavenc);
return FALSE;
}
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;
}
}
