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gstreamer/ext/esd/esdmon.c
Richard Boulton e13d88d991 Fix up esdmon timestamps, so that they don't go completely wrong if someone changes the frequency, depth or mono/ster... 
Original commit message from CVS:
Fix up esdmon timestamps, so that they don't go completely wrong if
someone changes the frequency, depth or mono/stereo parameters.
2002-03-02 15:51:47 +00:00

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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.
*/
#include <gst/gst.h>
#include <esd.h>
#define GST_TYPE_ESDMON \
(gst_esdmon_get_type())
#define GST_ESDMON(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_ESDMON,GstEsdmon))
#define GST_ESDMON_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_ESDMON,GstEsdmon))
#define GST_IS_ESDMON(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_ESDMON))
#define GST_IS_ESDMON_CLASS(obj) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_ESDMON))
typedef enum {
GST_ESDMON_OPEN = GST_ELEMENT_FLAG_LAST,
GST_ESDMON_FLAG_LAST = GST_ELEMENT_FLAG_LAST+2,
} GstEsdSrcFlags;
typedef struct _GstEsdmon GstEsdmon;
typedef struct _GstEsdmonClass GstEsdmonClass;
struct _GstEsdmon {
GstElement element;
GstPad *srcpad;
gchar* host;
int fd;
gint depth;
gint channels;
gint frequency;
guint64 basetime;
guint64 samples_since_basetime;
guint64 curoffset;
guint64 bytes_per_read;
};
struct _GstEsdmonClass {
GstElementClass parent_class;
};
GType gst_esdmon_get_type(void);
/* elementfactory information */
static GstElementDetails esdmon_details = {
"Esound audio monitor",
"Src/Esdmon",
"Monitors audio from an esound server",
VERSION,
"Richard Boulton <richard-gst@tartarus.org>",
"(C) 2002",
};
/* Signals and args */
enum {
/* FILL ME */
LAST_SIGNAL
};
enum {
ARG_0,
ARG_DEPTH,
ARG_BYTESPERREAD,
ARG_CUROFFSET,
ARG_CHANNELS,
ARG_RATE,
ARG_HOST,
};
GST_PADTEMPLATE_FACTORY (src_factory,
"src", /* the name of the pads */
GST_PAD_SRC, /* type of the pad */
GST_PAD_ALWAYS, /* ALWAYS/SOMETIMES */
GST_CAPS_NEW (
"esdmon_src8", /* the name of the caps */
"audio/raw", /* the mime type of the caps */
/* Properties follow: */
"format", GST_PROPS_STRING ("int"),
"law", GST_PROPS_INT (0),
"endianness", GST_PROPS_INT (G_BYTE_ORDER),
"signed", GST_PROPS_BOOLEAN (TRUE),
"width", GST_PROPS_INT (8),
"depth", GST_PROPS_INT (8),
"rate", GST_PROPS_INT_RANGE (8000, 96000),
"channels", GST_PROPS_LIST (GST_PROPS_INT (1), GST_PROPS_INT (2))
),
GST_CAPS_NEW (
"esdmon_src16", /* the name of the caps */
"audio/raw", /* the mime type of the caps */
/* Properties follow: */
"format", GST_PROPS_STRING ("int"),
"law", GST_PROPS_INT (0),
"endianness", GST_PROPS_INT (G_BYTE_ORDER),
"signed", GST_PROPS_BOOLEAN (TRUE),
"width", GST_PROPS_INT (16),
"depth", GST_PROPS_INT (16),
"rate", GST_PROPS_INT_RANGE (8000, 96000),
"channels", GST_PROPS_LIST (GST_PROPS_INT (1), GST_PROPS_INT (2))
)
);
static void gst_esdmon_class_init (GstEsdmonClass *klass);
static void gst_esdmon_init (GstEsdmon *esdmon);
static gboolean gst_esdmon_open_audio (GstEsdmon *src);
static void gst_esdmon_close_audio (GstEsdmon *src);
static GstElementStateReturn gst_esdmon_change_state (GstElement *element);
static gboolean gst_esdmon_sync_parms (GstEsdmon *esdmon);
static GstBuffer * 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), NULL,
NULL,
(GClassInitFunc)gst_esdmon_class_init,
NULL,
NULL,
sizeof(GstEsdmon),
0,
(GInstanceInitFunc)gst_esdmon_init,
};
esdmon_type = g_type_register_static(GST_TYPE_ELEMENT, "GstEsdmon", &esdmon_info, 0);
}
return esdmon_type;
}
static void
gst_esdmon_class_init (GstEsdmonClass *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_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(G_OBJECT_CLASS(klass), ARG_CUROFFSET,
g_param_spec_ulong("curoffset","curoffset","curoffset",
0,G_MAXULONG,0,G_PARAM_READABLE)); // CHECKME
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_DEPTH,
g_param_spec_enum("depth","depth","depth",
GST_TYPE_ESDMON_DEPTHS,16,G_PARAM_READWRITE)); /* CHECKME! */
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_CHANNELS,
g_param_spec_enum("channels","channels","channels",
GST_TYPE_ESDMON_CHANNELS,2,G_PARAM_READWRITE)); /* CHECKME! */
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_RATE,
g_param_spec_int("frequency","frequency","frequency",
G_MININT,G_MAXINT,0,G_PARAM_READWRITE)); /* CHECKME */
g_object_class_install_property(G_OBJECT_CLASS(klass), 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(GstEsdmon *esdmon)
{
esdmon->srcpad = gst_pad_new_from_template (
GST_PADTEMPLATE_GET (src_factory), "src");
gst_pad_set_get_function(esdmon->srcpad, gst_esdmon_get);
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 GstBuffer *
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 (GST_CAT_PLUGIN_INFO, "attempting to read something from esdmon\n");
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)) {
/* set caps on src pad */
if (!gst_pad_try_set_caps (esdmon->srcpad,
GST_CAPS_NEW (
"oss_src",
"audio/raw",
"format", GST_PROPS_STRING ("int"),
"law", GST_PROPS_INT (0), //FIXME
"endianness", GST_PROPS_INT (G_BYTE_ORDER), //FIXME
"signed", GST_PROPS_BOOLEAN (TRUE), //FIXME
"width", GST_PROPS_INT (esdmon->depth),
"depth", GST_PROPS_INT (esdmon->depth),
"rate", GST_PROPS_INT (esdmon->frequency),
"channels", GST_PROPS_INT (esdmon->channels)
)))
{
gst_element_error (GST_ELEMENT (esdmon), "could not set caps");
return NULL;
}
}
GST_BUFFER_SIZE (buf) = readbytes;
GST_BUFFER_OFFSET (buf) = esdmon->curoffset;
GST_BUFFER_TIMESTAMP (buf) = esdmon->basetime +
esdmon->samples_since_basetime * 1000000LL / esdmon->frequency;
esdmon->curoffset += readbytes;
readsamples = readbytes / esdmon->channels;
if (esdmon->depth == 16) readsamples /= 2;
esdmon->samples_since_basetime += readsamples;
GST_DEBUG (GST_CAT_PLUGIN_INFO, "pushed buffer from esdmon of %ld bytes, timestamp %lld\n", readbytes, GST_BUFFER_TIMESTAMP (buf));
return buf;
}
static void
gst_esdmon_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
{
GstEsdmon *esdmon;
/* it's not null if we got it, but it might not be ours */
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 * 1000000LL / 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;
/* it's not null if we got it, but it might not be ours */
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;
}
}
static gboolean
plugin_init (GModule *module, GstPlugin *plugin)
{
GstElementFactory *factory;
factory = gst_elementfactory_new("esdmon", GST_TYPE_ESDMON,
&esdmon_details);
g_return_val_if_fail(factory != NULL, FALSE);
gst_elementfactory_add_padtemplate(factory, GST_PADTEMPLATE_GET (src_factory));
gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
return TRUE;
}
GstPluginDesc plugin_desc = {
GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"esdmon",
plugin_init
};
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 (0, "esdmon: invalid bit depth (%d)\n", src->depth);
return FALSE;
}
if (src->channels == 2) esdformat |= ESD_STEREO;
else if (src->channels == 1) esdformat |= ESD_MONO;
else {
GST_DEBUG (0, "esdmon: invalid number of channels (%d)\n", src->channels);
return FALSE;
}
GST_DEBUG (0, "esdmon: attempting to open connection to esound server\n");
src->fd = esd_monitor_stream(esdformat, src->frequency, src->host, connname);
if ( src->fd < 0 ) {
GST_DEBUG (0, "esdmon: can't open connection to esound server\n");
return FALSE;
}
GST_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_FLAG_UNSET (src, GST_ESDMON_OPEN);
GST_DEBUG (0, "esdmon: closed sound device\n");
}
static GstElementStateReturn
gst_esdmon_change_state (GstElement *element)
{
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_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_FLAG_IS_SET (element, GST_ESDMON_OPEN)) {
if (!gst_esdmon_open_audio (GST_ESDMON (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;
}
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