gstreamer/sys/oss/gstosssrc.c
Ronald S. Bultje 96fc83aeac 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

558 lines
15 KiB
C

/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wtay@chello.be>
*
* gstosssrc.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 <fcntl.h>
#include <sys/soundcard.h>
#include <sys/ioctl.h>
#include <errno.h>
#include <unistd.h>
#include <string.h>
#include <gstosssrc.h>
#include <gstosselement.h>
#include <gst/audio/audioclock.h>
/* elementfactory information */
static GstElementDetails gst_osssrc_details = {
"Audio Source (OSS)",
"Source/Audio",
"LGPL",
"Read from the sound card",
VERSION,
"Erik Walthinsen <omega@cse.ogi.edu>",
"(C) 1999",
};
/* OssSrc signals and args */
enum {
/* FILL ME */
LAST_SIGNAL
};
enum {
ARG_0,
ARG_BUFFERSIZE,
ARG_FRAGMENT,
};
GST_PAD_TEMPLATE_FACTORY (osssrc_src_factory,
"src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_CAPS_NEW (
"osssrc_src",
"audio/x-raw-int",
"endianness", GST_PROPS_INT (G_BYTE_ORDER),
"signed", GST_PROPS_LIST (
GST_PROPS_BOOLEAN (TRUE),
GST_PROPS_BOOLEAN (FALSE)
),
"width", GST_PROPS_LIST (
GST_PROPS_INT (8),
GST_PROPS_INT (16)
),
"depth", GST_PROPS_LIST (
GST_PROPS_INT (8),
GST_PROPS_INT (16)
),
"rate", GST_PROPS_INT_RANGE (1000, 48000),
"channels", GST_PROPS_INT_RANGE (1, 2)
)
)
static void gst_osssrc_class_init (GstOssSrcClass *klass);
static void gst_osssrc_init (GstOssSrc *osssrc);
static void gst_osssrc_dispose (GObject *object);
static GstPadLinkReturn gst_osssrc_srcconnect (GstPad *pad, GstCaps *caps);
static const GstFormat* gst_osssrc_get_formats (GstPad *pad);
static gboolean gst_osssrc_convert (GstPad *pad,
GstFormat src_format, gint64 src_value,
GstFormat *dest_format, gint64 *dest_value);
static void gst_osssrc_set_property (GObject *object, guint prop_id,
const GValue *value, GParamSpec *pspec);
static void gst_osssrc_get_property (GObject *object, guint prop_id,
GValue *value, GParamSpec *pspec);
static GstElementStateReturn gst_osssrc_change_state (GstElement *element);
static void gst_osssrc_set_clock (GstElement *element, GstClock *clock);
static GstClock* gst_osssrc_get_clock (GstElement *element);
static GstClockTime gst_osssrc_get_time (GstClock *clock, gpointer data);
static const GstEventMask* gst_osssrc_get_event_masks (GstPad *pad);
static gboolean gst_osssrc_src_event (GstPad *pad, GstEvent *event);
static gboolean gst_osssrc_send_event (GstElement *element, GstEvent *event);
static const GstQueryType* gst_osssrc_get_query_types (GstPad *pad);
static gboolean gst_osssrc_src_query (GstPad *pad, GstQueryType type,
GstFormat *format, gint64 *value);
static GstBuffer * gst_osssrc_get (GstPad *pad);
static GstElementClass *parent_class = NULL;
/*static guint gst_osssrc_signals[LAST_SIGNAL] = { 0 }; */
GType
gst_osssrc_get_type (void)
{
static GType osssrc_type = 0;
if (!osssrc_type) {
static const GTypeInfo osssrc_info = {
sizeof(GstOssSrcClass),
NULL,
NULL,
(GClassInitFunc)gst_osssrc_class_init,
NULL,
NULL,
sizeof(GstOssSrc),
0,
(GInstanceInitFunc)gst_osssrc_init,
};
osssrc_type = g_type_register_static (GST_TYPE_OSSELEMENT, "GstOssSrc", &osssrc_info, 0);
}
return osssrc_type;
}
static void
gst_osssrc_class_init (GstOssSrcClass *klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass*)klass;
gstelement_class = (GstElementClass*)klass;
parent_class = g_type_class_ref (GST_TYPE_OSSELEMENT);
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_BUFFERSIZE,
g_param_spec_ulong ("buffersize","Buffer Size","The size of the buffers with samples",
0, G_MAXULONG, 0, G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_FRAGMENT,
g_param_spec_int ("fragment", "Fragment",
"The fragment as 0xMMMMSSSS (MMMM = total fragments, 2^SSSS = fragment size)",
0, G_MAXINT, 6, G_PARAM_READWRITE));
gobject_class->set_property = gst_osssrc_set_property;
gobject_class->get_property = gst_osssrc_get_property;
gobject_class->dispose = gst_osssrc_dispose;
gstelement_class->change_state = gst_osssrc_change_state;
gstelement_class->send_event = gst_osssrc_send_event;
gstelement_class->set_clock = gst_osssrc_set_clock;
gstelement_class->get_clock = gst_osssrc_get_clock;
}
static void
gst_osssrc_init (GstOssSrc *osssrc)
{
osssrc->srcpad = gst_pad_new_from_template (
GST_PAD_TEMPLATE_GET (osssrc_src_factory), "src");
gst_pad_set_get_function (osssrc->srcpad, gst_osssrc_get);
gst_pad_set_link_function (osssrc->srcpad, gst_osssrc_srcconnect);
gst_pad_set_convert_function (osssrc->srcpad, gst_osssrc_convert);
gst_pad_set_formats_function (osssrc->srcpad, gst_osssrc_get_formats);
gst_pad_set_event_function (osssrc->srcpad, gst_osssrc_src_event);
gst_pad_set_event_mask_function (osssrc->srcpad, gst_osssrc_get_event_masks);
gst_pad_set_query_function (osssrc->srcpad, gst_osssrc_src_query);
gst_pad_set_query_type_function (osssrc->srcpad, gst_osssrc_get_query_types);
gst_element_add_pad (GST_ELEMENT (osssrc), osssrc->srcpad);
osssrc->buffersize = 4096;
osssrc->curoffset = 0;
osssrc->provided_clock = gst_audio_clock_new ("ossclock", gst_osssrc_get_time, osssrc);
gst_object_set_parent (GST_OBJECT (osssrc->provided_clock), GST_OBJECT (osssrc));
osssrc->clock = NULL;
}
static void
gst_osssrc_dispose (GObject *object)
{
GstOssSrc *osssrc = (GstOssSrc *) object;
gst_object_unparent (GST_OBJECT (osssrc->provided_clock));
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static GstPadLinkReturn
gst_osssrc_srcconnect (GstPad *pad, GstCaps *caps)
{
GstOssSrc *src;
src = GST_OSSSRC(gst_pad_get_parent (pad));
if (!GST_CAPS_IS_FIXED (caps))
return GST_PAD_LINK_DELAYED;
if (!gst_osselement_parse_caps (GST_OSSELEMENT (src), caps))
return GST_PAD_LINK_REFUSED;
if (!gst_osselement_sync_parms (GST_OSSELEMENT (src)))
return GST_PAD_LINK_REFUSED;
return GST_PAD_LINK_OK;
}
static gboolean
gst_osssrc_negotiate (GstPad *pad)
{
GstOssSrc *src;
GstCaps *allowed;
src = GST_OSSSRC(gst_pad_get_parent (pad));
allowed = gst_pad_get_allowed_caps (pad);
if (!gst_osselement_merge_fixed_caps (GST_OSSELEMENT (src), allowed))
return FALSE;
if (!gst_osselement_sync_parms (GST_OSSELEMENT (src)))
return FALSE;
/* set caps on src pad */
if (gst_pad_try_set_caps (src->srcpad,
GST_CAPS_NEW (
"oss_src",
"audio/x-raw-int",
"endianness", GST_PROPS_INT (GST_OSSELEMENT (src)->endianness),
"signed", GST_PROPS_BOOLEAN (GST_OSSELEMENT (src)->sign),
"width", GST_PROPS_INT (GST_OSSELEMENT (src)->width),
"depth", GST_PROPS_INT (GST_OSSELEMENT (src)->depth),
"rate", GST_PROPS_INT (GST_OSSELEMENT (src)->rate),
"channels", GST_PROPS_INT (GST_OSSELEMENT (src)->channels)
)) <= 0)
{
return FALSE;
}
return TRUE;
}
static GstClockTime
gst_osssrc_get_time (GstClock *clock, gpointer data)
{
GstOssSrc *osssrc = GST_OSSSRC (data);
audio_buf_info info;
if (!GST_OSSELEMENT (osssrc)->bps)
return 0;
if (ioctl(GST_OSSELEMENT (osssrc)->fd, SNDCTL_DSP_GETISPACE, &info) < 0)
return 0;
return (osssrc->curoffset + info.bytes) * GST_SECOND / GST_OSSELEMENT (osssrc)->bps;
}
static GstClock*
gst_osssrc_get_clock (GstElement *element)
{
GstOssSrc *osssrc;
osssrc = GST_OSSSRC (element);
return GST_CLOCK (osssrc->provided_clock);
}
static void
gst_osssrc_set_clock (GstElement *element, GstClock *clock)
{
GstOssSrc *osssrc;
osssrc = GST_OSSSRC (element);
osssrc->clock = clock;
}
static GstBuffer *
gst_osssrc_get (GstPad *pad)
{
GstOssSrc *src;
GstBuffer *buf;
glong readbytes;
src = GST_OSSSRC(gst_pad_get_parent (pad));
GST_DEBUG ("attempting to read something from the soundcard");
if (src->need_eos) {
src->need_eos = FALSE;
return GST_BUFFER (gst_event_new (GST_EVENT_EOS));
}
buf = gst_buffer_new_and_alloc (src->buffersize);
if (!GST_PAD_CAPS (pad)) {
/* nothing was negotiated, we can decide on a format */
if (!gst_osssrc_negotiate (pad)) {
gst_buffer_unref (buf);
gst_element_error (GST_ELEMENT (src), "could not negotiate format");
return GST_BUFFER (gst_event_new (GST_EVENT_INTERRUPT));
}
}
if (GST_OSSELEMENT (src)->bps == 0) {
gst_buffer_unref (buf);
gst_element_error (GST_ELEMENT (src), "no format negotiated");
return GST_BUFFER (gst_event_new (GST_EVENT_INTERRUPT));
}
readbytes = read (GST_OSSELEMENT (src)->fd,GST_BUFFER_DATA (buf),
src->buffersize);
if (readbytes < 0) {
gst_buffer_unref (buf);
gst_element_error (GST_ELEMENT (src), "error reading data (%s)",
strerror (errno));
return GST_BUFFER (gst_event_new (GST_EVENT_INTERRUPT));
}
if (readbytes == 0) {
gst_buffer_unref (buf);
gst_element_set_eos (GST_ELEMENT (src));
return GST_BUFFER (gst_event_new (GST_EVENT_INTERRUPT));
}
GST_BUFFER_SIZE (buf) = readbytes;
GST_BUFFER_OFFSET (buf) = src->curoffset;
/* FIXME: we are falsely assuming that we are the master clock here */
GST_BUFFER_TIMESTAMP (buf) = src->curoffset * GST_SECOND / GST_OSSELEMENT (src)->bps;
GST_BUFFER_DURATION (buf) = (GST_SECOND * GST_BUFFER_SIZE (buf)) /
(GST_OSSELEMENT (src)->bps * GST_OSSELEMENT (src)->rate);
src->curoffset += readbytes;
GST_DEBUG ("pushed buffer from soundcard of %ld bytes, timestamp %" G_GINT64_FORMAT,
readbytes, GST_BUFFER_TIMESTAMP (buf));
return buf;
}
static void
gst_osssrc_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
{
GstOssSrc *src;
src = GST_OSSSRC (object);
switch (prop_id) {
case ARG_BUFFERSIZE:
src->buffersize = g_value_get_ulong (value);
break;
case ARG_FRAGMENT:
GST_OSSELEMENT (src)->fragment = g_value_get_int (value);
gst_osselement_sync_parms (GST_OSSELEMENT (src));
break;
default:
break;
}
}
static void
gst_osssrc_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
{
GstOssSrc *src;
src = GST_OSSSRC (object);
switch (prop_id) {
case ARG_BUFFERSIZE:
g_value_set_ulong (value, src->buffersize);
break;
case ARG_FRAGMENT:
g_value_set_int (value, GST_OSSELEMENT (src)->fragment);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstElementStateReturn
gst_osssrc_change_state (GstElement *element)
{
GstOssSrc *osssrc = GST_OSSSRC (element);
GST_DEBUG ("osssrc: state change");
switch (GST_STATE_TRANSITION (element)) {
case GST_STATE_READY_TO_PAUSED:
osssrc->curoffset = 0;
break;
case GST_STATE_PAUSED_TO_PLAYING:
gst_audio_clock_set_active (GST_AUDIO_CLOCK (osssrc->provided_clock), TRUE);
break;
case GST_STATE_PLAYING_TO_PAUSED:
gst_audio_clock_set_active (GST_AUDIO_CLOCK (osssrc->provided_clock), FALSE);
break;
case GST_STATE_PAUSED_TO_READY:
if (GST_FLAG_IS_SET (element, GST_OSSSRC_OPEN))
ioctl (GST_OSSELEMENT (osssrc)->fd, SNDCTL_DSP_RESET, 0);
break;
default:
break;
}
if (GST_ELEMENT_CLASS (parent_class)->change_state)
return GST_ELEMENT_CLASS (parent_class)->change_state (element);
return GST_STATE_SUCCESS;
}
static const GstFormat*
gst_osssrc_get_formats (GstPad *pad)
{
static const GstFormat formats[] = {
GST_FORMAT_TIME,
GST_FORMAT_DEFAULT,
GST_FORMAT_BYTES,
0
};
return formats;
}
static gboolean
gst_osssrc_convert (GstPad *pad, GstFormat src_format, gint64 src_value,
GstFormat *dest_format, gint64 *dest_value)
{
GstOssSrc *osssrc;
osssrc = GST_OSSSRC (gst_pad_get_parent (pad));
return gst_osselement_convert (GST_OSSELEMENT (osssrc), src_format, src_value,
dest_format, dest_value);
}
static const GstEventMask*
gst_osssrc_get_event_masks (GstPad *pad)
{
static const GstEventMask gst_osssrc_src_event_masks[] = {
{ GST_EVENT_EOS, 0 },
{ GST_EVENT_SIZE, 0 },
{ 0, }
};
return gst_osssrc_src_event_masks;
}
static gboolean
gst_osssrc_src_event (GstPad *pad, GstEvent *event)
{
GstOssSrc *osssrc;
gboolean retval = FALSE;
osssrc = GST_OSSSRC (gst_pad_get_parent (pad));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_EOS:
osssrc->need_eos = TRUE;
retval = TRUE;
break;
case GST_EVENT_SIZE:
{
GstFormat format;
gint64 value;
format = GST_FORMAT_BYTES;
/* convert to bytes */
if (gst_osselement_convert (GST_OSSELEMENT (osssrc),
GST_EVENT_SIZE_FORMAT (event),
GST_EVENT_SIZE_VALUE (event),
&format, &value))
{
osssrc->buffersize = GST_EVENT_SIZE_VALUE (event);
g_object_notify (G_OBJECT (osssrc), "buffersize");
retval = TRUE;
}
}
default:
break;
}
gst_event_unref (event);
return retval;
}
static gboolean
gst_osssrc_send_event (GstElement *element,
GstEvent *event)
{
GstOssSrc *osssrc = GST_OSSSRC (element);
return gst_osssrc_src_event (osssrc->srcpad, event);
}
static const GstQueryType*
gst_osssrc_get_query_types (GstPad *pad)
{
static const GstQueryType query_types[] = {
GST_QUERY_POSITION,
0,
};
return query_types;
}
static gboolean
gst_osssrc_src_query (GstPad *pad, GstQueryType type, GstFormat *format, gint64 *value)
{
gboolean res = FALSE;
GstOssSrc *osssrc;
osssrc = GST_OSSSRC (gst_pad_get_parent (pad));
switch (type) {
case GST_QUERY_POSITION:
res = gst_osselement_convert (GST_OSSELEMENT (osssrc),
GST_FORMAT_BYTES, osssrc->curoffset,
format, value);
break;
default:
break;
}
return res;
}
gboolean
gst_osssrc_factory_init (GstPlugin *plugin)
{
GstElementFactory *factory;
factory = gst_element_factory_new ("osssrc",
GST_TYPE_OSSSRC,
&gst_osssrc_details);
g_return_val_if_fail (factory != NULL, FALSE);
gst_element_factory_add_pad_template (factory,
GST_PAD_TEMPLATE_GET (osssrc_src_factory));
gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
return TRUE;
}