gstreamer/ext/esd/esdmon.c

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/* GStreamer
* Copyright (C) <2001,2002> Richard Boulton <richard-gst@tartarus.org>
*
* Based on example.c:
* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "esdmon.h"
#include <esd.h>
#include <unistd.h>
/* elementfactory information */
static GstElementDetails esdmon_details = {
"Esound audio monitor",
"Source/Audio",
"Monitors audio from an esound server",
"Richard Boulton <richard-gst@tartarus.org>",
};
/* Signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
enum
{
ARG_0,
ARG_DEPTH,
ARG_BYTESPERREAD,
ARG_CUROFFSET,
ARG_CHANNELS,
ARG_RATE,
ARG_HOST
};
static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("audio/x-raw-int, "
"endianness = (int) " G_STRINGIFY (G_BYTE_ORDER) ", "
"signed = (boolean) TRUE, "
"width = (int) 16, "
"depth = (int) 16, "
"rate = [ 8000, 96000 ], "
"channels = [ 1, 2 ]; "
"audio/x-raw-int, "
"signed = (boolean) FALSE, "
"width = (int) 8, "
"depth = (int) 8, " "rate = [ 8000, 96000 ], " "channels = [ 1, 2 ]")
);
static void gst_esdmon_base_init (gpointer g_class);
static void gst_esdmon_class_init (gpointer g_class, gpointer class_data);
static void gst_esdmon_init (GTypeInstance * instance, gpointer g_class);
static gboolean gst_esdmon_open_audio (GstEsdmon * src);
static void gst_esdmon_close_audio (GstEsdmon * src);
static GstStateChangeReturn gst_esdmon_change_state (GstElement * element,
GstStateChange transition);
static gboolean gst_esdmon_sync_parms (GstEsdmon * esdmon);
static GstData *gst_esdmon_get (GstPad * pad);
static void gst_esdmon_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_esdmon_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
#define GST_TYPE_ESDMON_DEPTHS (gst_esdmon_depths_get_type())
static GType
gst_esdmon_depths_get_type (void)
{
static GType esdmon_depths_type = 0;
static GEnumValue esdmon_depths[] = {
{8, "8", "8 Bits"},
{16, "16", "16 Bits"},
{0, NULL, NULL},
};
if (!esdmon_depths_type) {
esdmon_depths_type =
g_enum_register_static ("GstEsdmonDepths", esdmon_depths);
}
return esdmon_depths_type;
}
#define GST_TYPE_ESDMON_CHANNELS (gst_esdmon_channels_get_type())
static GType
gst_esdmon_channels_get_type (void)
{
static GType esdmon_channels_type = 0;
static GEnumValue esdmon_channels[] = {
{1, "1", "Mono"},
{2, "2", "Stereo"},
{0, NULL, NULL},
};
if (!esdmon_channels_type) {
esdmon_channels_type =
g_enum_register_static ("GstEsdmonChannels", esdmon_channels);
}
return esdmon_channels_type;
}
static GstElementClass *parent_class = NULL;
/*static guint gst_esdmon_signals[LAST_SIGNAL] = { 0 }; */
GType
gst_esdmon_get_type (void)
{
static GType esdmon_type = 0;
if (!esdmon_type) {
static const GTypeInfo esdmon_info = {
sizeof (GstEsdmonClass),
gst_esdmon_base_init,
NULL,
gst_esdmon_class_init,
NULL,
NULL,
sizeof (GstEsdmon),
0,
gst_esdmon_init,
};
esdmon_type =
g_type_register_static (GST_TYPE_ELEMENT, "GstEsdmon", &esdmon_info, 0);
}
return esdmon_type;
}
static void
gst_esdmon_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&src_factory));
gst_element_class_set_details (element_class, &esdmon_details);
}
static void
gst_esdmon_class_init (gpointer g_class, gpointer class_data)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (g_class);
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class);
parent_class = g_type_class_peek_parent (g_class);
g_object_class_install_property (gobject_class, ARG_BYTESPERREAD, g_param_spec_ulong ("bytes_per_read", "bytes_per_read", "bytes_per_read", 0, G_MAXULONG, 0, G_PARAM_READWRITE)); /* CHECKME */
g_object_class_install_property (gobject_class, ARG_CUROFFSET, g_param_spec_ulong ("curoffset", "curoffset", "curoffset", 0, G_MAXULONG, 0, G_PARAM_READABLE)); /* CHECKME */
g_object_class_install_property (gobject_class, ARG_DEPTH, g_param_spec_enum ("depth", "depth", "depth", GST_TYPE_ESDMON_DEPTHS, 16, G_PARAM_READWRITE)); /* CHECKME! */
g_object_class_install_property (gobject_class, ARG_CHANNELS, g_param_spec_enum ("channels", "channels", "channels", GST_TYPE_ESDMON_CHANNELS, 2, G_PARAM_READWRITE)); /* CHECKME! */
g_object_class_install_property (gobject_class, ARG_RATE, g_param_spec_int ("frequency", "frequency", "frequency", G_MININT, G_MAXINT, 0, G_PARAM_READWRITE)); /* CHECKME */
g_object_class_install_property (gobject_class, ARG_HOST, g_param_spec_string ("host", "host", "host", NULL, G_PARAM_READWRITE)); /* CHECKME */
gobject_class->set_property = gst_esdmon_set_property;
gobject_class->get_property = gst_esdmon_get_property;
gstelement_class->change_state = gst_esdmon_change_state;
}
static void
gst_esdmon_init (GTypeInstance * instance, gpointer g_class)
{
GstEsdmon *esdmon = GST_ESDMON (instance);
esdmon->srcpad =
gst_pad_new_from_template (gst_element_class_get_pad_template
(GST_ELEMENT_GET_CLASS (esdmon), "src"), "src");
gst_pad_set_get_function (esdmon->srcpad, gst_esdmon_get);
gst_pad_use_explicit_caps (esdmon->srcpad);
gst_element_add_pad (GST_ELEMENT (esdmon), esdmon->srcpad);
esdmon->fd = -1;
/* FIXME: get default from somewhere better than just putting them inline. */
esdmon->depth = 16;
esdmon->channels = 2;
esdmon->frequency = 44100;
esdmon->host = NULL;
esdmon->bytes_per_read = 4096;
esdmon->curoffset = 0;
esdmon->basetime = 0;
esdmon->samples_since_basetime = 0;
}
static gboolean
gst_esdmon_sync_parms (GstEsdmon * esdmon)
{
g_return_val_if_fail (esdmon != NULL, FALSE);
g_return_val_if_fail (GST_IS_ESDMON (esdmon), FALSE);
if (esdmon->fd == -1)
return TRUE;
/* Need to set fd to use new parameters: only way to do this is to reopen. */
gst_esdmon_close_audio (esdmon);
return gst_esdmon_open_audio (esdmon);
}
static GstData *
gst_esdmon_get (GstPad * pad)
{
GstEsdmon *esdmon;
GstBuffer *buf;
glong readbytes;
glong readsamples;
g_return_val_if_fail (pad != NULL, NULL);
esdmon = GST_ESDMON (gst_pad_get_parent (pad));
GST_DEBUG ("attempting to read something from esdmon");
buf = gst_buffer_new ();
g_return_val_if_fail (buf, NULL);
GST_BUFFER_DATA (buf) = (gpointer) g_malloc (esdmon->bytes_per_read);
readbytes = read (esdmon->fd, GST_BUFFER_DATA (buf), esdmon->bytes_per_read);
if (readbytes == 0) {
gst_element_set_eos (GST_ELEMENT (esdmon));
return NULL;
}
if (!GST_PAD_CAPS (pad)) {
GstCaps *caps = gst_caps_new_simple ("audio/x-raw-int",
"endianness", G_TYPE_INT, G_BYTE_ORDER,
"signed", G_TYPE_BOOLEAN, esdmon->depth == 8 ? FALSE : TRUE,
"width", G_TYPE_INT, esdmon->depth,
"depth", G_TYPE_INT, esdmon->depth,
"rate", G_TYPE_INT, esdmon->frequency,
"channels", G_TYPE_INT, esdmon->channels,
NULL);
/* set caps on src pad */
if (gst_pad_set_explicit_caps (esdmon->srcpad, caps) <= 0) {
GST_ELEMENT_ERROR (esdmon, CORE, NEGOTIATION, (NULL), (NULL));
gst_caps_free (caps);
return NULL;
}
gst_caps_free (caps);
}
GST_BUFFER_SIZE (buf) = readbytes;
GST_BUFFER_OFFSET (buf) = esdmon->curoffset;
GST_BUFFER_TIMESTAMP (buf) = esdmon->basetime +
esdmon->samples_since_basetime * GST_SECOND / esdmon->frequency;
esdmon->curoffset += readbytes;
readsamples = readbytes / esdmon->channels;
if (esdmon->depth == 16)
readsamples /= 2;
esdmon->samples_since_basetime += readsamples;
GST_DEBUG ("pushed buffer from esdmon of %ld bytes, timestamp %"
G_GINT64_FORMAT, readbytes, GST_BUFFER_TIMESTAMP (buf));
return GST_DATA (buf);
}
static void
gst_esdmon_set_property (GObject * object, guint prop_id, const GValue * value,
GParamSpec * pspec)
{
GstEsdmon *esdmon;
g_return_if_fail (GST_IS_ESDMON (object));
esdmon = GST_ESDMON (object);
switch (prop_id) {
case ARG_BYTESPERREAD:
esdmon->bytes_per_read = g_value_get_ulong (value);
/* No need to sync params - will just happen on next read. */
break;
case ARG_DEPTH:
esdmon->depth = g_value_get_enum (value);
gst_esdmon_sync_parms (esdmon);
break;
case ARG_CHANNELS:
esdmon->channels = g_value_get_enum (value);
gst_esdmon_sync_parms (esdmon);
break;
case ARG_RATE:
/* Preserve the timestamps */
esdmon->basetime =
esdmon->samples_since_basetime * GST_SECOND / esdmon->frequency;
esdmon->samples_since_basetime = 0;
/* Set the new frequency */
esdmon->frequency = g_value_get_int (value);
gst_esdmon_sync_parms (esdmon);
break;
case ARG_HOST:
if (esdmon->host != NULL)
g_free (esdmon->host);
if (g_value_get_string (value) == NULL)
esdmon->host = NULL;
else
esdmon->host = g_strdup (g_value_get_string (value));
break;
default:
break;
}
}
static void
gst_esdmon_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstEsdmon *esdmon;
g_return_if_fail (GST_IS_ESDMON (object));
esdmon = GST_ESDMON (object);
switch (prop_id) {
case ARG_BYTESPERREAD:
g_value_set_ulong (value, esdmon->bytes_per_read);
break;
case ARG_CUROFFSET:
g_value_set_ulong (value, esdmon->curoffset);
break;
case ARG_DEPTH:
g_value_set_enum (value, esdmon->depth);
break;
case ARG_CHANNELS:
g_value_set_enum (value, esdmon->channels);
break;
case ARG_RATE:
g_value_set_int (value, esdmon->frequency);
break;
case ARG_HOST:
g_value_set_string (value, esdmon->host);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
gboolean
gst_esdmon_factory_init (GstPlugin * plugin)
{
if (!gst_element_register (plugin, "esdmon", GST_RANK_NONE, GST_TYPE_ESDMON))
return FALSE;
return TRUE;
}
static gboolean
gst_esdmon_open_audio (GstEsdmon * src)
{
/* Name used by esound for this connection. */
const char *connname = "GStreamer";
/* Bitmap describing audio format. */
esd_format_t esdformat = ESD_STREAM | ESD_PLAY;
g_return_val_if_fail (src->fd == -1, FALSE);
if (src->depth == 16)
esdformat |= ESD_BITS16;
else if (src->depth == 8)
esdformat |= ESD_BITS8;
else {
GST_DEBUG ("esdmon: invalid bit depth (%d)", src->depth);
return FALSE;
}
if (src->channels == 2)
esdformat |= ESD_STEREO;
else if (src->channels == 1)
esdformat |= ESD_MONO;
else {
GST_DEBUG ("esdmon: invalid number of channels (%d)", src->channels);
return FALSE;
}
GST_DEBUG ("esdmon: attempting to open connection to esound server");
src->fd = esd_monitor_stream (esdformat, src->frequency, src->host, connname);
if (src->fd < 0) {
GST_DEBUG ("esdmon: can't open connection to esound server");
return FALSE;
}
GST_OBJECT_FLAG_SET (src, GST_ESDMON_OPEN);
return TRUE;
}
static void
gst_esdmon_close_audio (GstEsdmon * src)
{
if (src->fd < 0)
return;
close (src->fd);
src->fd = -1;
GST_OBJECT_FLAG_UNSET (src, GST_ESDMON_OPEN);
GST_DEBUG ("esdmon: closed sound device");
}
static GstStateChangeReturn
gst_esdmon_change_state (GstElement * element, GstStateChange transition)
{
g_return_val_if_fail (GST_IS_ESDMON (element), FALSE);
/* if going down into NULL state, close the fd if it's open */
if (GST_STATE_PENDING (element) == GST_STATE_NULL) {
if (GST_OBJECT_FLAG_IS_SET (element, GST_ESDMON_OPEN))
gst_esdmon_close_audio (GST_ESDMON (element));
/* otherwise (READY or higher) we need to open the fd */
} else {
if (!GST_OBJECT_FLAG_IS_SET (element, GST_ESDMON_OPEN)) {
if (!gst_esdmon_open_audio (GST_ESDMON (element)))
return GST_STATE_CHANGE_FAILURE;
}
}
if (GST_ELEMENT_CLASS (parent_class)->change_state)
return GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
return GST_STATE_CHANGE_SUCCESS;
}