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gstreamer/sys/oss/gstosselement.c

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Interface implementation example: OSS mixer. Also osscommon->osselement so it can be loaded without being a source/si... Original commit message from CVS: Interface implementation example: OSS mixer. Also osscommon->osselement so it can be loaded without being a source/sink (for a stand-alone mixer)
2003-09-13 01:22:59 +00:00
/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wim.taymans@chello.be>
*
* gstosssink.c:
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <sys/soundcard.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include "gstosselement.h"
#include "gstossmixer.h"
enum {
ARG_0,
ARG_DEVICE,
ARG_MIXERDEV,
Make GstMixerTrack a GObject. I also want to make it emit several signals, starting work is in here but it's not full... Original commit message from CVS: Make GstMixerTrack a GObject. I also want to make it emit several signals, starting work is in here but it's not fully implemented yet. for OSS, this will cause issues, but for ALSA, this is all automated.
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ARG_DEVICE_NAME,
Interface implementation example: OSS mixer. Also osscommon->osselement so it can be loaded without being a source/si... Original commit message from CVS: Interface implementation example: OSS mixer. Also osscommon->osselement so it can be loaded without being a source/sink (for a stand-alone mixer)
2003-09-13 01:22:59 +00:00
};
/* elementfactory information */
static GstElementDetails gst_osselement_details = {
"Audio Element (OSS)",
"Generic/Audio",
"LGPL",
"Generic OSS element",
VERSION,
"Erik Walthinsen <omega@cse.ogi.edu>",
"(C) 1999",
};
static void gst_osselement_class_init (GstOssElementClass *klass);
static void gst_osselement_init (GstOssElement *oss);
static void gst_osselement_dispose (GObject *object);
static void gst_osselement_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gst_osselement_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static GstElementStateReturn gst_osselement_change_state (GstElement *element);
static GstElementClass *parent_class = NULL;
/*static guint gst_osssrc_signals[LAST_SIGNAL] = { 0 }; */
GType
gst_osselement_get_type (void)
{
static GType osselement_type = 0;
if (!osselement_type) {
static const GTypeInfo osselement_info = {
sizeof(GstOssElementClass),
NULL,
NULL,
(GClassInitFunc)gst_osselement_class_init,
NULL,
NULL,
sizeof(GstOssElement),
0,
(GInstanceInitFunc)gst_osselement_init,
};
static const GInterfaceInfo ossiface_info = {
(GInterfaceInitFunc) gst_oss_interface_init,
NULL,
NULL,
};
static const GInterfaceInfo ossmixer_info = {
(GInterfaceInitFunc) gst_ossmixer_interface_init,
NULL,
NULL,
};
osselement_type = g_type_register_static (GST_TYPE_ELEMENT,
"GstOssElement",
&osselement_info, 0);
g_type_add_interface_static (osselement_type,
GST_TYPE_INTERFACE,
&ossiface_info);
g_type_add_interface_static (osselement_type,
GST_TYPE_MIXER,
&ossmixer_info);
}
return osselement_type;
}
static void
gst_osselement_class_init (GstOssElementClass *klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass*)klass;
gstelement_class = (GstElementClass*)klass;
parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_DEVICE,
Make GstMixerTrack a GObject. I also want to make it emit several signals, starting work is in here but it's not full... Original commit message from CVS: Make GstMixerTrack a GObject. I also want to make it emit several signals, starting work is in here but it's not fully implemented yet. for OSS, this will cause issues, but for ALSA, this is all automated.
2003-10-10 12:24:20 +00:00
g_param_spec_string ("device", "Device", "OSS device (/dev/dspN usually)",
Interface implementation example: OSS mixer. Also osscommon->osselement so it can be loaded without being a source/si... Original commit message from CVS: Interface implementation example: OSS mixer. Also osscommon->osselement so it can be loaded without being a source/sink (for a stand-alone mixer)
2003-09-13 01:22:59 +00:00
"default", G_PARAM_READWRITE));
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_MIXERDEV,
Make GstMixerTrack a GObject. I also want to make it emit several signals, starting work is in here but it's not full... Original commit message from CVS: Make GstMixerTrack a GObject. I also want to make it emit several signals, starting work is in here but it's not fully implemented yet. for OSS, this will cause issues, but for ALSA, this is all automated.
2003-10-10 12:24:20 +00:00
g_param_spec_string ("mixerdev", "Mixer device",
"OSS mixer device (/dev/mixerN usually)",
Interface implementation example: OSS mixer. Also osscommon->osselement so it can be loaded without being a source/si... Original commit message from CVS: Interface implementation example: OSS mixer. Also osscommon->osselement so it can be loaded without being a source/sink (for a stand-alone mixer)
2003-09-13 01:22:59 +00:00
"default", G_PARAM_READWRITE));
Make GstMixerTrack a GObject. I also want to make it emit several signals, starting work is in here but it's not full... Original commit message from CVS: Make GstMixerTrack a GObject. I also want to make it emit several signals, starting work is in here but it's not fully implemented yet. for OSS, this will cause issues, but for ALSA, this is all automated.
2003-10-10 12:24:20 +00:00
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_MIXERDEV,
g_param_spec_string ("device_name", "Device name", "Name of the device",
NULL, G_PARAM_READABLE));
Interface implementation example: OSS mixer. Also osscommon->osselement so it can be loaded without being a source/si... Original commit message from CVS: Interface implementation example: OSS mixer. Also osscommon->osselement so it can be loaded without being a source/sink (for a stand-alone mixer)
2003-09-13 01:22:59 +00:00
gobject_class->set_property = gst_osselement_set_property;
gobject_class->get_property = gst_osselement_get_property;
gobject_class->dispose = gst_osselement_dispose;
gstelement_class->change_state = gst_osselement_change_state;
}
static void
gst_osselement_init (GstOssElement *oss)
{
oss->device = g_strdup ("/dev/dsp");
oss->mixer_dev = g_strdup ("/dev/mixer");
oss->fd = -1;
oss->mixer_fd = -1;
changing 'channel' to 'track' to avoid naming overlap Original commit message from CVS: changing 'channel' to 'track' to avoid naming overlap
2003-10-09 22:02:37 +00:00
oss->tracklist = NULL;
Make GstMixerTrack a GObject. I also want to make it emit several signals, starting work is in here but it's not full... Original commit message from CVS: Make GstMixerTrack a GObject. I also want to make it emit several signals, starting work is in here but it's not fully implemented yet. for OSS, this will cause issues, but for ALSA, this is all automated.
2003-10-10 12:24:20 +00:00
oss->device_name = NULL;
Interface implementation example: OSS mixer. Also osscommon->osselement so it can be loaded without being a source/si... Original commit message from CVS: Interface implementation example: OSS mixer. Also osscommon->osselement so it can be loaded without being a source/sink (for a stand-alone mixer)
2003-09-13 01:22:59 +00:00
gst_osselement_reset (oss);
}
static void
gst_osselement_dispose (GObject *object)
{
GstOssElement *oss = (GstOssElement *) object;
g_free (oss->device);
g_free (oss->mixer_dev);
G_OBJECT_CLASS (parent_class)->dispose (object);
}
void
gst_osselement_reset (GstOssElement *oss)
{
oss->law = 0;
oss->endianness = G_BYTE_ORDER;
oss->sign = TRUE;
oss->width = 16;
oss->depth = 16;
oss->channels = 2;
oss->rate = 44100;
oss->fragment = 6;
oss->bps = 0;
/* AFMT_*_BE not available on all OSS includes (e.g. FBSD) */
#ifdef WORDS_BIGENDIAN
oss->format = AFMT_S16_BE;
#else
oss->format = AFMT_S16_LE;
#endif /* WORDS_BIGENDIAN */
}
static gboolean
gst_ossformat_get (gint law, gint endianness, gboolean sign, gint width, gint depth,
gint *format, gint *bps)
{
if (width != depth)
return FALSE;
*bps = 1;
if (law == 0) {
if (width == 16) {
if (sign == TRUE) {
if (endianness == G_LITTLE_ENDIAN) {
*format = AFMT_S16_LE;
GST_DEBUG (
"16 bit signed LE, no law (%d)", *format);
}
else if (endianness == G_BIG_ENDIAN) {
*format = AFMT_S16_BE;
GST_DEBUG (
"16 bit signed BE, no law (%d)", *format);
}
}
else {
if (endianness == G_LITTLE_ENDIAN) {
*format = AFMT_U16_LE;
GST_DEBUG (
"16 bit unsigned LE, no law (%d)", *format);
}
else if (endianness == G_BIG_ENDIAN) {
*format = AFMT_U16_BE;
GST_DEBUG (
"16 bit unsigned BE, no law (%d)", *format);
}
}
*bps = 2;
}
else if (width == 8) {
if (sign == TRUE) {
*format = AFMT_S8;
GST_DEBUG (
"8 bit signed, no law (%d)", *format);
}
else {
*format = AFMT_U8;
GST_DEBUG (
"8 bit unsigned, no law (%d)", *format);
}
*bps = 1;
}
} else if (law == 1) {
*format = AFMT_MU_LAW;
GST_DEBUG (
"mu law (%d)", *format);
} else if (law == 2) {
*format = AFMT_A_LAW;
GST_DEBUG (
"a law (%d)", *format);
} else {
g_critical ("unknown law");
return FALSE;
}
return TRUE;
}
gboolean
gst_osselement_parse_caps (GstOssElement *oss, GstCaps *caps)
{
gint bps, format;
gst_caps_get_int (caps, "width", &oss->width);
gst_caps_get_int (caps, "depth", &oss->depth);
if (oss->width != oss->depth)
return FALSE;
gst_caps_get_int (caps, "law", &oss->law);
gst_caps_get_int (caps, "endianness", &oss->endianness);
gst_caps_get_boolean (caps, "signed", &oss->sign);
if (!gst_ossformat_get (oss->law, oss->endianness, oss->sign,
oss->width, oss->depth, &format, &bps))
{
GST_DEBUG ("could not get format");
return FALSE;
}
gst_caps_get_int (caps, "channels", &oss->channels);
gst_caps_get_int (caps, "rate", &oss->rate);
oss->bps = bps * oss->channels * oss->rate;
oss->format = format;
return TRUE;
}
#define GET_FIXED_INT(caps, name, dest) \
G_STMT_START { \
if (gst_caps_has_fixed_property (caps, name)) \
gst_caps_get_int (caps, name, dest); \
} G_STMT_END
#define GET_FIXED_BOOLEAN(caps, name, dest) \
G_STMT_START { \
if (gst_caps_has_fixed_property (caps, name)) \
gst_caps_get_boolean (caps, name, dest); \
} G_STMT_END
gboolean
gst_osselement_merge_fixed_caps (GstOssElement *oss, GstCaps *caps)
{
gint bps, format;
/* peel off fixed stuff from the caps */
GET_FIXED_INT (caps, "law", &oss->law);
GET_FIXED_INT (caps, "endianness", &oss->endianness);
GET_FIXED_BOOLEAN (caps, "signed", &oss->sign);
GET_FIXED_INT (caps, "width", &oss->width);
GET_FIXED_INT (caps, "depth", &oss->depth);
if (!gst_ossformat_get (oss->law, oss->endianness, oss->sign,
oss->width, oss->depth, &format, &bps))
{
return FALSE;
}
GET_FIXED_INT (caps, "rate", &oss->rate);
GET_FIXED_INT (caps, "channels", &oss->channels);
oss->bps = bps * oss->channels * oss->rate;
oss->format = format;
return TRUE;
}
gboolean
gst_osselement_sync_parms (GstOssElement *oss)
{
audio_buf_info space;
int frag;
gint target_format;
gint target_channels;
gint target_rate;
gint fragscale, frag_ln;
if (oss->fd == -1)
return FALSE;
if (oss->fragment >> 16)
frag = oss->fragment;
else
frag = 0x7FFF0000 | oss->fragment;
GST_INFO ("osselement: setting sound card to %dHz %d format %s (%08x fragment)",
oss->rate, oss->format,
(oss->channels == 2) ? "stereo" : "mono", frag);
ioctl (oss->fd, SNDCTL_DSP_SETFRAGMENT, &frag);
ioctl (oss->fd, SNDCTL_DSP_RESET, 0);
target_format = oss->format;
target_channels = oss->channels;
target_rate = oss->rate;
ioctl (oss->fd, SNDCTL_DSP_SETFMT, &oss->format);
ioctl (oss->fd, SNDCTL_DSP_CHANNELS, &oss->channels);
ioctl (oss->fd, SNDCTL_DSP_SPEED, &oss->rate);
ioctl (oss->fd, SNDCTL_DSP_GETBLKSIZE, &oss->fragment_size);
if (oss->mode == GST_OSSELEMENT_WRITE) {
ioctl (oss->fd, SNDCTL_DSP_GETOSPACE, &space);
}
else {
ioctl (oss->fd, SNDCTL_DSP_GETISPACE, &space);
}
/* calculate new fragment using a poor man's logarithm function */
fragscale = 1;
frag_ln = 0;
while (fragscale < space.fragsize) {
fragscale <<= 1;
frag_ln++;
}
oss->fragment = space.fragstotal << 16 | frag_ln;
GST_INFO ("osselement: set sound card to %dHz, %d format, %s "
"(%d bytes buffer, %08x fragment)",
oss->rate, oss->format,
(oss->channels == 2) ? "stereo" : "mono",
space.bytes, oss->fragment);
oss->fragment_time = (GST_SECOND * oss->fragment_size) / oss->bps;
GST_INFO ("fragment time %u %" G_GUINT64_FORMAT "\n",
oss->bps, oss->fragment_time);
if (target_format != oss->format ||
target_channels != oss->channels ||
target_rate != oss->rate)
{
g_warning ("couldn't set requested OSS parameters, enjoy the noise :)");
/* we could eventually return FALSE here, or just do some additional tests
* to see that the frequencies don't differ too much etc.. */
}
return TRUE;
}
static gboolean
gst_osselement_open_audio (GstOssElement *oss)
{
gint caps;
GstOssOpenMode mode = GST_OSSELEMENT_READ;
const GList *padlist;
g_return_val_if_fail (oss->fd == -1, FALSE);
GST_INFO ("osselement: attempting to open sound device");
/* Ok, so how do we open the device? We assume that we have (max.) one
* pad, and if this is a sinkpad, we're osssink (w). else, we're osssrc (r) */
padlist = gst_element_get_pad_list (GST_ELEMENT (oss));
if (padlist != NULL) {
GstPad *firstpad = padlist->data;
if (GST_PAD_IS_SINK (firstpad)) {
mode = GST_OSSELEMENT_WRITE;
}
}
/* first try to open the sound card */
if (mode == GST_OSSELEMENT_WRITE) {
/* open non blocking first so that it returns immediatly with an error
* when we cannot get to the device */
oss->fd = open (oss->device, O_WRONLY | O_NONBLOCK);
if (oss->fd >= 0) {
close (oss->fd);
/* re-open the sound device in blocking mode */
oss->fd = open (oss->device, O_WRONLY);
}
}
else {
oss->fd = open (oss->device, O_RDONLY);
}
if (oss->fd < 0) {
switch (errno) {
case EBUSY:
reverting error patch before making a branch. Original commit message from CVS: reverting error patch before making a branch.
2003-09-16 10:00:02 +00:00
gst_element_error (GST_ELEMENT (oss),
"osselement: Unable to open %s (in use ?)",
oss->device);
Interface implementation example: OSS mixer. Also osscommon->osselement so it can be loaded without being a source/si... Original commit message from CVS: Interface implementation example: OSS mixer. Also osscommon->osselement so it can be loaded without being a source/sink (for a stand-alone mixer)
2003-09-13 01:22:59 +00:00
break;
case EISDIR:
reverting error patch before making a branch. Original commit message from CVS: reverting error patch before making a branch.
2003-09-16 10:00:02 +00:00
gst_element_error (GST_ELEMENT (oss),
"osselement: Device %s is a directory",
oss->device);
Interface implementation example: OSS mixer. Also osscommon->osselement so it can be loaded without being a source/si... Original commit message from CVS: Interface implementation example: OSS mixer. Also osscommon->osselement so it can be loaded without being a source/sink (for a stand-alone mixer)
2003-09-13 01:22:59 +00:00
break;
case EACCES:
case ETXTBSY:
reverting error patch before making a branch. Original commit message from CVS: reverting error patch before making a branch.
2003-09-16 10:00:02 +00:00
gst_element_error (GST_ELEMENT (oss),
"osselement: Cannot access %s, check permissions",
oss->device);
Interface implementation example: OSS mixer. Also osscommon->osselement so it can be loaded without being a source/si... Original commit message from CVS: Interface implementation example: OSS mixer. Also osscommon->osselement so it can be loaded without being a source/sink (for a stand-alone mixer)
2003-09-13 01:22:59 +00:00
break;
case ENXIO:
case ENODEV:
case ENOENT:
reverting error patch before making a branch. Original commit message from CVS: reverting error patch before making a branch.
2003-09-16 10:00:02 +00:00
gst_element_error (GST_ELEMENT (oss),
"osselement: Cannot access %s, does it exist ?",
oss->device);
Interface implementation example: OSS mixer. Also osscommon->osselement so it can be loaded without being a source/si... Original commit message from CVS: Interface implementation example: OSS mixer. Also osscommon->osselement so it can be loaded without being a source/sink (for a stand-alone mixer)
2003-09-13 01:22:59 +00:00
break;
case EROFS:
reverting error patch before making a branch. Original commit message from CVS: reverting error patch before making a branch.
2003-09-16 10:00:02 +00:00
gst_element_error (GST_ELEMENT (oss),
"osselement: Cannot access %s, read-only filesystem ?",
oss->device);
Interface implementation example: OSS mixer. Also osscommon->osselement so it can be loaded without being a source/si... Original commit message from CVS: Interface implementation example: OSS mixer. Also osscommon->osselement so it can be loaded without being a source/sink (for a stand-alone mixer)
2003-09-13 01:22:59 +00:00
default:
/* FIXME: strerror is not threadsafe */
reverting error patch before making a branch. Original commit message from CVS: reverting error patch before making a branch.
2003-09-16 10:00:02 +00:00
gst_element_error (GST_ELEMENT (oss),
"osselement: Cannot open %s, generic error: %s",
oss->device, strerror (errno));
Interface implementation example: OSS mixer. Also osscommon->osselement so it can be loaded without being a source/si... Original commit message from CVS: Interface implementation example: OSS mixer. Also osscommon->osselement so it can be loaded without being a source/sink (for a stand-alone mixer)
2003-09-13 01:22:59 +00:00
break;
}
return FALSE;
}
oss->mode = mode;
/* we have it, set the default parameters and go have fun */
/* set card state */
ioctl (oss->fd, SNDCTL_DSP_GETCAPS, &caps);
GST_INFO ("osselement: Capabilities %08x", caps);
if (caps & DSP_CAP_DUPLEX) GST_INFO ( "osselement: Full duplex");
if (caps & DSP_CAP_REALTIME) GST_INFO ( "osselement: Realtime");
if (caps & DSP_CAP_BATCH) GST_INFO ( "osselement: Batch");
if (caps & DSP_CAP_COPROC) GST_INFO ( "osselement: Has coprocessor");
if (caps & DSP_CAP_TRIGGER) GST_INFO ( "osselement: Trigger");
if (caps & DSP_CAP_MMAP) GST_INFO ( "osselement: Direct access");
#ifdef DSP_CAP_MULTI
if (caps & DSP_CAP_MULTI) GST_INFO ( "osselement: Multiple open");
#endif /* DSP_CAP_MULTI */
#ifdef DSP_CAP_BIND
if (caps & DSP_CAP_BIND) GST_INFO ( "osselement: Channel binding");
#endif /* DSP_CAP_BIND */
ioctl(oss->fd, SNDCTL_DSP_GETFMTS, &caps);
GST_INFO ( "osselement: Formats %08x", caps);
if (caps & AFMT_MU_LAW) GST_INFO ( "osselement: MU_LAW");
if (caps & AFMT_A_LAW) GST_INFO ( "osselement: A_LAW");
if (caps & AFMT_IMA_ADPCM) GST_INFO ( "osselement: IMA_ADPCM");
if (caps & AFMT_U8) GST_INFO ( "osselement: U8");
if (caps & AFMT_S16_LE) GST_INFO ( "osselement: S16_LE");
if (caps & AFMT_S16_BE) GST_INFO ( "osselement: S16_BE");
if (caps & AFMT_S8) GST_INFO ( "osselement: S8");
if (caps & AFMT_U16_LE) GST_INFO ( "osselement: U16_LE");
if (caps & AFMT_U16_BE) GST_INFO ( "osselement: U16_BE");
if (caps & AFMT_MPEG) GST_INFO ( "osselement: MPEG");
#ifdef AFMT_AC3
if (caps & AFMT_AC3) GST_INFO ( "osselement: AC3");
#endif
GST_INFO ("osselement: opened audio (%s) with fd=%d",
oss->device, oss->fd);
oss->caps = caps;
gst_ossmixer_build_list (oss);
return TRUE;
}
static void
gst_osselement_close_audio (GstOssElement *oss)
{
if (oss->fd < 0)
return;
gst_ossmixer_free_list (oss);
close(oss->fd);
oss->fd = -1;
}
gboolean
gst_osselement_convert (GstOssElement *oss,
GstFormat src_format,
gint64 src_value,
GstFormat *dest_format,
gint64 *dest_value)
{
gboolean res = TRUE;
if (src_format == *dest_format) {
*dest_value = src_value;
return TRUE;
}
if (oss->bps == 0 || oss->channels == 0 || oss->width == 0)
return FALSE;
switch (src_format) {
case GST_FORMAT_BYTES:
switch (*dest_format) {
case GST_FORMAT_TIME:
*dest_value = src_value * GST_SECOND / oss->bps;
break;
case GST_FORMAT_DEFAULT:
*dest_value = src_value / (oss->channels * oss->width);
break;
default:
res = FALSE;
}
break;
case GST_FORMAT_TIME:
switch (*dest_format) {
case GST_FORMAT_BYTES:
*dest_value = src_value * oss->bps / GST_SECOND;
break;
case GST_FORMAT_DEFAULT:
*dest_value = src_value * oss->rate / GST_SECOND;
break;
default:
res = FALSE;
}
break;
case GST_FORMAT_DEFAULT:
switch (*dest_format) {
case GST_FORMAT_TIME:
*dest_value = src_value * GST_SECOND / oss->rate;
break;
case GST_FORMAT_BYTES:
*dest_value = src_value * oss->channels * oss->width;
break;
default:
res = FALSE;
}
break;
default:
res = FALSE;
}
return res;
}
static void
gst_osselement_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GstOssElement *oss = GST_OSSELEMENT (object);
switch (prop_id) {
case ARG_DEVICE:
/* disallow changing the device while it is opened
get_property("device") should return the right one */
if (gst_element_get_state (GST_ELEMENT (oss)) != GST_STATE_NULL) {
g_free (oss->device);
oss->device = g_strdup (g_value_get_string (value));
}
break;
case ARG_MIXERDEV:
/* disallow changing the device while it is opened
get_property("mixerdev") should return the right one */
if (gst_element_get_state (GST_ELEMENT (oss)) != GST_STATE_NULL) {
g_free (oss->mixer_dev);
oss->mixer_dev = g_strdup (g_value_get_string (value));
}
break;
default:
break;
}
}
static void
gst_osselement_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GstOssElement *oss = GST_OSSELEMENT (object);
switch (prop_id) {
case ARG_DEVICE:
g_value_set_string (value, oss->device);
break;
case ARG_MIXERDEV:
g_value_set_string (value, oss->mixer_dev);
break;
Make GstMixerTrack a GObject. I also want to make it emit several signals, starting work is in here but it's not full... Original commit message from CVS: Make GstMixerTrack a GObject. I also want to make it emit several signals, starting work is in here but it's not fully implemented yet. for OSS, this will cause issues, but for ALSA, this is all automated.
2003-10-10 12:24:20 +00:00
case ARG_DEVICE_NAME:
g_value_set_string (value, oss->device_name);
break;
Interface implementation example: OSS mixer. Also osscommon->osselement so it can be loaded without being a source/si... Original commit message from CVS: Interface implementation example: OSS mixer. Also osscommon->osselement so it can be loaded without being a source/sink (for a stand-alone mixer)
2003-09-13 01:22:59 +00:00
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstElementStateReturn
gst_osselement_change_state (GstElement *element)
{
GstOssElement *oss = GST_OSSELEMENT (element);
switch (GST_STATE_TRANSITION (element)) {
case GST_STATE_NULL_TO_READY:
if (!gst_osselement_open_audio (oss)) {
return GST_STATE_FAILURE;
}
GST_INFO ("osselement: opened sound device");
break;
case GST_STATE_READY_TO_NULL:
gst_osselement_close_audio (oss);
gst_osselement_reset (oss);
GST_INFO ("osselement: closed sound device");
break;
default:
break;
}
if (GST_ELEMENT_CLASS (parent_class)->change_state)
return GST_ELEMENT_CLASS (parent_class)->change_state (element);
return GST_STATE_SUCCESS;
}
gboolean
gst_osselement_factory_init (GstPlugin *plugin)
{
GstElementFactory *factory;
factory = gst_element_factory_new ("osselement",
GST_TYPE_OSSELEMENT,
&gst_osselement_details);
g_return_val_if_fail (factory != NULL, FALSE);
gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
return TRUE;
}
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