gstreamer/plugins/elements/gstaudiosrc.c
Erik Walthinsen c287566d0c Massive scheduling changes (again). Not entirely complete, but getting closer. Need to think about various scheduli...
Original commit message from CVS:
Massive scheduling changes (again).  Not entirely complete, but getting
closer.  Need to think about various scheduling plans that we might want
to produce, and figure out the rules for what is legal, and how to get
the results we need as far as the plan.
2000-12-20 09:39:43 +00:00

320 lines
8.7 KiB
C

/* Gnome-Streamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* 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.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/soundcard.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include <gstaudiosrc.h>
GstElementDetails gst_audiosrc_details = {
"Audio (OSS) Source",
"Source/Audio",
"Read from the sound card",
VERSION,
"Erik Walthinsen <omega@cse.ogi.edu>",
"(C) 1999",
};
/* AudioSrc signals and args */
enum {
/* FILL ME */
LAST_SIGNAL
};
enum {
ARG_0,
ARG_BYTESPERREAD,
ARG_CUROFFSET,
ARG_FORMAT,
ARG_CHANNELS,
ARG_FREQUENCY,
};
static void gst_audiosrc_class_init (GstAudioSrcClass *klass);
static void gst_audiosrc_init (GstAudioSrc *audiosrc);
static void gst_audiosrc_set_arg (GtkObject *object, GtkArg *arg, guint id);
static void gst_audiosrc_get_arg (GtkObject *object, GtkArg *arg, guint id);
static GstElementStateReturn gst_audiosrc_change_state (GstElement *element);
static void gst_audiosrc_close_audio (GstAudioSrc *src);
static gboolean gst_audiosrc_open_audio (GstAudioSrc *src);
static void gst_audiosrc_sync_parms (GstAudioSrc *audiosrc);
static GstBuffer * gst_audiosrc_get (GstPad *pad);
static GstSrcClass *parent_class = NULL;
//static guint gst_audiosrc_signals[LAST_SIGNAL] = { 0 };
GtkType
gst_audiosrc_get_type (void)
{
static GtkType audiosrc_type = 0;
if (!audiosrc_type) {
static const GtkTypeInfo audiosrc_info = {
"GstAudioSrc",
sizeof(GstAudioSrc),
sizeof(GstAudioSrcClass),
(GtkClassInitFunc)gst_audiosrc_class_init,
(GtkObjectInitFunc)gst_audiosrc_init,
(GtkArgSetFunc)gst_audiosrc_set_arg,
(GtkArgGetFunc)gst_audiosrc_get_arg,
(GtkClassInitFunc)NULL,
};
audiosrc_type = gtk_type_unique (GST_TYPE_SRC, &audiosrc_info);
}
return audiosrc_type;
}
static void
gst_audiosrc_class_init (GstAudioSrcClass *klass)
{
GtkObjectClass *gtkobject_class;
GstElementClass *gstelement_class;
GstSrcClass *gstsrc_class;
gtkobject_class = (GtkObjectClass*)klass;
gstelement_class = (GstElementClass*)klass;
gstsrc_class = (GstSrcClass*)klass;
parent_class = gtk_type_class (GST_TYPE_SRC);
gtk_object_add_arg_type ("GstAudioSrc::bytes_per_read", GTK_TYPE_ULONG,
GTK_ARG_READWRITE, ARG_BYTESPERREAD);
gtk_object_add_arg_type ("GstAudioSrc::curoffset", GTK_TYPE_ULONG,
GTK_ARG_READABLE, ARG_CUROFFSET);
gtk_object_add_arg_type ("GstAudioSrc::format", GTK_TYPE_INT,
GTK_ARG_READWRITE, ARG_FORMAT);
gtk_object_add_arg_type ("GstAudioSrc::channels", GTK_TYPE_INT,
GTK_ARG_READWRITE, ARG_CHANNELS);
gtk_object_add_arg_type ("GstAudioSrc::frequency", GTK_TYPE_INT,
GTK_ARG_READWRITE, ARG_FREQUENCY);
gtkobject_class->set_arg = gst_audiosrc_set_arg;
gtkobject_class->get_arg = gst_audiosrc_get_arg;
gstelement_class->change_state = gst_audiosrc_change_state;
}
static void
gst_audiosrc_init (GstAudioSrc *audiosrc)
{
audiosrc->srcpad = gst_pad_new ("src", GST_PAD_SRC);
gst_pad_set_get_function(audiosrc->srcpad,gst_audiosrc_get);
gst_element_add_pad (GST_ELEMENT (audiosrc), audiosrc->srcpad);
audiosrc->fd = -1;
// audiosrc->meta = (MetaAudioRaw *)gst_meta_new();
// audiosrc->meta->format = AFMT_S16_LE;
// audiosrc->meta->channels = 2;
// audiosrc->meta->frequency = 44100;
// audiosrc->meta->bps = 4;
audiosrc->bytes_per_read = 4096;
audiosrc->curoffset = 0;
audiosrc->seq = 0;
}
static GstBuffer *
gst_audiosrc_get (GstPad *pad)
{
GstAudioSrc *src;
GstBuffer *buf;
glong readbytes;
g_return_val_if_fail (pad != NULL, NULL);
src = GST_AUDIOSRC(gst_pad_get_parent(pad));
// g_print("attempting to read something from soundcard\n");
buf = gst_buffer_new ();
g_return_val_if_fail (buf, NULL);
GST_BUFFER_DATA (buf) = (gpointer)g_malloc (src->bytes_per_read);
readbytes = read (src->fd,GST_BUFFER_DATA (buf),
src->bytes_per_read);
if (readbytes == 0) {
gst_src_signal_eos (GST_SRC (src));
return NULL;
}
GST_BUFFER_SIZE (buf) = readbytes;
GST_BUFFER_OFFSET (buf) = src->curoffset;
src->curoffset += readbytes;
// gst_buffer_add_meta(buf,GST_META(newmeta));
// g_print("pushed buffer from soundcard of %d bytes\n",readbytes);
return buf;
}
static void
gst_audiosrc_set_arg (GtkObject *object, GtkArg *arg, guint id)
{
GstAudioSrc *src;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_AUDIOSRC (object));
src = GST_AUDIOSRC (object);
switch (id) {
case ARG_BYTESPERREAD:
src->bytes_per_read = GTK_VALUE_INT (*arg);
break;
case ARG_FORMAT:
src->format = GTK_VALUE_INT (*arg);
break;
case ARG_CHANNELS:
src->channels = GTK_VALUE_INT (*arg);
break;
case ARG_FREQUENCY:
src->frequency = GTK_VALUE_INT (*arg);
break;
default:
break;
}
}
static void
gst_audiosrc_get_arg (GtkObject *object, GtkArg *arg, guint id)
{
GstAudioSrc *src;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_AUDIOSRC (object));
src = GST_AUDIOSRC (object);
switch (id) {
case ARG_BYTESPERREAD:
GTK_VALUE_INT (*arg) = src->bytes_per_read;
break;
case ARG_FORMAT:
GTK_VALUE_INT (*arg) = src->format;
break;
case ARG_CHANNELS:
GTK_VALUE_INT (*arg) = src->channels;
break;
case ARG_FREQUENCY:
GTK_VALUE_INT (*arg) = src->frequency;
break;
default:
arg->type = GTK_TYPE_INVALID;
break;
}
}
static GstElementStateReturn
gst_audiosrc_change_state (GstElement *element)
{
g_return_val_if_fail (GST_IS_AUDIOSRC (element), FALSE);
/* if going down into NULL state, close the file if it's open */
if (GST_STATE_PENDING (element) == GST_STATE_NULL) {
if (GST_FLAG_IS_SET (element, GST_AUDIOSRC_OPEN))
gst_audiosrc_close_audio (GST_AUDIOSRC (element));
/* otherwise (READY or higher) we need to open the sound card */
} else {
if (!GST_FLAG_IS_SET (element, GST_AUDIOSRC_OPEN)) {
if (!gst_audiosrc_open_audio (GST_AUDIOSRC (element)))
return GST_STATE_FAILURE;
}
}
if (GST_ELEMENT_CLASS (parent_class)->change_state)
return GST_ELEMENT_CLASS (parent_class)->change_state (element);
return GST_STATE_SUCCESS;
}
static gboolean
gst_audiosrc_open_audio (GstAudioSrc *src)
{
g_return_val_if_fail (!GST_FLAG_IS_SET (src, GST_AUDIOSRC_OPEN), FALSE);
/* first try to open the sound card */
src->fd = open("/dev/dsp", O_RDONLY);
/* if we have it, set the default parameters and go have fun */
if (src->fd > 0) {
int arg = 0x7fff0006;
if (ioctl (src->fd, SNDCTL_DSP_SETFRAGMENT, &arg)) perror("uh");
/* set card state */
gst_audiosrc_sync_parms (src);
DEBUG("opened audio\n");
GST_FLAG_SET (src, GST_AUDIOSRC_OPEN);
return TRUE;
}
return FALSE;
}
static void
gst_audiosrc_close_audio (GstAudioSrc *src)
{
g_return_if_fail (GST_FLAG_IS_SET (src, GST_AUDIOSRC_OPEN));
close(src->fd);
src->fd = -1;
GST_FLAG_UNSET (src, GST_AUDIOSRC_OPEN);
}
static void
gst_audiosrc_sync_parms (GstAudioSrc *audiosrc)
{
audio_buf_info ospace;
g_return_if_fail (audiosrc != NULL);
g_return_if_fail (GST_IS_AUDIOSRC (audiosrc));
g_return_if_fail (audiosrc->fd > 0);
ioctl(audiosrc->fd, SNDCTL_DSP_RESET, 0);
ioctl(audiosrc->fd, SNDCTL_DSP_SETFMT, &audiosrc->format);
ioctl(audiosrc->fd, SNDCTL_DSP_CHANNELS, &audiosrc->channels);
ioctl(audiosrc->fd, SNDCTL_DSP_SPEED, &audiosrc->frequency);
ioctl(audiosrc->fd, SNDCTL_DSP_GETOSPACE, &ospace);
g_print("setting sound card to %dKHz %d bit %s (%d bytes buffer)\n",
audiosrc->frequency,audiosrc->format,
(audiosrc->channels == 2) ? "stereo" : "mono",ospace.bytes);
// audiosrc->meta.format = audiosrc->format;
// audiosrc->meta.channels = audiosrc->channels;
// audiosrc->meta.frequency = audiosrc->frequency;
// audiosrc->sentmeta = FALSE;
}