gstreamer/gst/playondemand/gstplayondemand.c
Andy Wingo 6863dd9240 a hack to work around intltool's brokenness a current check for mpeg2dec details->klass reorganizations an element br...
Original commit message from CVS:
* a hack to work around intltool's brokenness
* a current check for mpeg2dec
* details->klass reorganizations
* an element browser that uses details->klass
* separated cdxa parse out from the avi directory
2002-04-20 21:42:51 +00:00

429 lines
13 KiB
C

/* GStreamer
* Copyright (C) 1999-2001 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 <string.h>
#include <gst/gst.h>
#include <gst/audio/audio.h>
#include "gstplayondemand.h"
#define POD_MAX_PLAYS 192 /* maximum number of simultaneous plays */
#define POD_BUFPOOL_SIZE 4096 /* gstreamer buffer size to make if no
bufferpool is available, must be divisible
by sizeof(gfloat) */
#define POD_BUFPOOL_NUM 6 /* number of buffers to allocate per chunk in
sink buffer pool */
#define POD_BUFFER_SIZE 882000 /* enough space for 10 seconds of 16-bit audio
at 44100 samples per second ... */
static GstElementDetails play_on_demand_details = {
"Play On Demand",
"Filter/Audio/Effect",
"Plays a stream whenever it receives a certain signal",
VERSION,
"Leif Morgan Johnson <lmjohns3@eos.ncsu.edu>",
"(C) 2001",
};
/* Filter signals and args */
enum {
/* FILL ME */
PLAY_SIGNAL,
RESET_SIGNAL,
LAST_SIGNAL
};
static guint gst_pod_filter_signals[LAST_SIGNAL] = { 0 };
enum {
ARG_0,
ARG_SILENT,
ARG_FOLLOWTAIL,
ARG_BUFFERSIZE
};
static GstPadTemplate*
play_on_demand_sink_factory (void)
{
static GstPadTemplate *template = NULL;
if (!template) {
template = gst_pad_template_new
("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
gst_caps_append(gst_caps_new ("sink_int", "audio/raw",
GST_AUDIO_INT_PAD_TEMPLATE_PROPS),
gst_caps_new ("sink_float", "audio/raw",
GST_AUDIO_FLOAT_MONO_PAD_TEMPLATE_PROPS)),
NULL);
}
return template;
}
static GstPadTemplate*
play_on_demand_src_factory (void)
{
static GstPadTemplate *template = NULL;
if (!template)
template = gst_pad_template_new
("src", GST_PAD_SRC, GST_PAD_ALWAYS,
gst_caps_append (gst_caps_new ("src_float", "audio/raw",
GST_AUDIO_FLOAT_MONO_PAD_TEMPLATE_PROPS),
gst_caps_new ("src_int", "audio/raw",
GST_AUDIO_INT_PAD_TEMPLATE_PROPS)),
NULL);
return template;
}
static void play_on_demand_class_init (GstPlayOnDemandClass *klass);
static void play_on_demand_init (GstPlayOnDemand *filter);
static void play_on_demand_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec);
static void play_on_demand_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec);
static GstPadConnectReturn play_on_demand_pad_connect (GstPad *pad, GstCaps *caps);
static void play_on_demand_loop (GstElement *elem);
static void play_on_demand_play_handler (GstElement *elem);
static void play_on_demand_reset_handler (GstElement *elem);
static GstElementClass *parent_class = NULL;
static GstBufferPool*
play_on_demand_get_bufferpool (GstPad *pad)
{
GstPlayOnDemand *filter;
filter = GST_PLAYONDEMAND(gst_pad_get_parent(pad));
return gst_pad_get_bufferpool(filter->srcpad);
}
static GstPadConnectReturn
play_on_demand_pad_connect (GstPad *pad, GstCaps *caps)
{
const gchar *format;
GstPlayOnDemand *filter;
g_return_val_if_fail(caps != NULL, GST_PAD_CONNECT_DELAYED);
g_return_val_if_fail(pad != NULL, GST_PAD_CONNECT_DELAYED);
filter = GST_PLAYONDEMAND(GST_PAD_PARENT(pad));
gst_caps_get_string(caps, "format", &format);
gst_caps_get_int(caps, "rate", &filter->rate);
gst_caps_get_int(caps, "channels", &filter->channels);
if (strcmp(format, "int") == 0) {
filter->format = GST_PLAYONDEMAND_FORMAT_INT;
gst_caps_get_int (caps, "width", &filter->width);
gst_caps_get_int (caps, "depth", &filter->depth);
gst_caps_get_int (caps, "law", &filter->law);
gst_caps_get_int (caps, "endianness", &filter->endianness);
gst_caps_get_boolean (caps, "signed", &filter->is_signed);
if (!filter->silent) {
g_print ("PlayOnDemand : channels %d, rate %d\n",
filter->channels, filter->rate);
g_print ("PlayOnDemand : format int, bit width %d, endianness %d, signed %s\n",
filter->width, filter->endianness, filter->is_signed ? "yes" : "no");
}
} else if (strcmp(format, "float") == 0) {
filter->format = GST_PLAYONDEMAND_FORMAT_FLOAT;
gst_caps_get_string (caps, "layout", &filter->layout);
gst_caps_get_float (caps, "intercept", &filter->intercept);
gst_caps_get_float (caps, "slope", &filter->slope);
if (!filter->silent) {
g_print ("PlayOnDemand : channels %d, rate %d\n",
filter->channels, filter->rate);
g_print ("PlayOnDemand : format float, layout %s, intercept %f, slope %f\n",
filter->layout, filter->intercept, filter->slope);
}
}
if (GST_CAPS_IS_FIXED (caps) && ! gst_pad_try_set_caps (filter->srcpad, caps))
return GST_PAD_CONNECT_REFUSED;
return GST_PAD_CONNECT_DELAYED;
}
GType
gst_play_on_demand_get_type (void)
{
static GType play_on_demand_type = 0;
if (! play_on_demand_type) {
static const GTypeInfo play_on_demand_info = {
sizeof(GstPlayOnDemandClass),
NULL,
NULL,
(GClassInitFunc) play_on_demand_class_init,
NULL,
NULL,
sizeof(GstPlayOnDemand),
0,
(GInstanceInitFunc) play_on_demand_init,
};
play_on_demand_type = g_type_register_static(GST_TYPE_ELEMENT, "GstPlayOnDemand", &play_on_demand_info, 0);
}
return play_on_demand_type;
}
static void
play_on_demand_class_init (GstPlayOnDemandClass *klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
gst_pod_filter_signals[PLAY_SIGNAL] =
g_signal_new("play",
G_TYPE_FROM_CLASS(klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET(GstPlayOnDemandClass, play),
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);
gst_pod_filter_signals[RESET_SIGNAL] =
g_signal_new("reset",
G_TYPE_FROM_CLASS(klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET(GstPlayOnDemandClass, reset),
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);
klass->play = play_on_demand_play_handler;
klass->reset = play_on_demand_reset_handler;
parent_class = g_type_class_ref(GST_TYPE_ELEMENT);
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_SILENT,
g_param_spec_boolean("silent","silent","silent",
TRUE, G_PARAM_READWRITE));
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_FOLLOWTAIL,
g_param_spec_boolean("follow-stream-tail","follow-stream-tail","follow-stream-tail",
FALSE, G_PARAM_READWRITE));
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_BUFFERSIZE,
g_param_spec_uint("buffer-size","buffer-size","buffer-size",
0, G_MAXUINT - 1, POD_BUFFER_SIZE, G_PARAM_READWRITE));
gobject_class->set_property = play_on_demand_set_property;
gobject_class->get_property = play_on_demand_get_property;
}
static void
play_on_demand_init (GstPlayOnDemand *filter)
{
guint i;
filter->srcpad = gst_pad_new_from_template(play_on_demand_src_factory(), "src");
filter->sinkpad = gst_pad_new_from_template(play_on_demand_sink_factory(), "sink");
gst_pad_set_bufferpool_function(filter->sinkpad, play_on_demand_get_bufferpool);
gst_pad_set_connect_function(filter->sinkpad, play_on_demand_pad_connect);
gst_element_add_pad(GST_ELEMENT(filter), filter->sinkpad);
gst_element_add_pad(GST_ELEMENT(filter), filter->srcpad);
gst_element_set_loop_function(GST_ELEMENT(filter), play_on_demand_loop);
filter->follow_stream_tail = FALSE;
filter->silent = TRUE;
filter->buffer = g_new(gchar, POD_BUFFER_SIZE);
filter->buffer_size = POD_BUFFER_SIZE;
filter->start = 0;
filter->write = 0;
filter->eos = FALSE;
/* the plays are stored as an array of buffer offsets. this initializes the
array to `blank' values (G_MAXUINT is an invalid index for this filter). */
filter->plays = g_new(guint, POD_MAX_PLAYS);
for (i = 0; i < POD_MAX_PLAYS; i++) {
filter->plays[i] = G_MAXUINT;
}
}
static void
play_on_demand_loop (GstElement *elem)
{
GstPlayOnDemand *filter = GST_PLAYONDEMAND(elem);
guint num_in, num_out, num_filter;
GstBuffer *in, *out;
register guint j, k, t;
guint w, offset;
g_return_if_fail(filter != NULL);
g_return_if_fail(GST_IS_PLAYONDEMAND(filter));
filter->bufpool = gst_pad_get_bufferpool(filter->srcpad);
if (filter->bufpool == NULL) {
filter->bufpool = gst_buffer_pool_get_default(POD_BUFPOOL_SIZE, POD_BUFPOOL_NUM);
}
in = gst_pad_pull(filter->sinkpad);
if (filter->format == GST_PLAYONDEMAND_FORMAT_INT) {
if (filter->width == 16) {
gint16 min = -32768;
gint16 max = 32767;
gint16 zero = 0;
#define _TYPE_ gint16
#include "filter.func"
#undef _TYPE_
} else if (filter->width == 8) {
gint8 min = -128;
gint8 max = 127;
gint8 zero = 0;
#define _TYPE_ gint8
#include "filter.func"
#undef _TYPE_
}
} else if (filter->format == GST_PLAYONDEMAND_FORMAT_FLOAT) {
gfloat min = -1.0;
gfloat max = 1.0;
gfloat zero = 0.0;
#define _TYPE_ gfloat
#include "filter.func"
#undef _TYPE_
}
}
static void
play_on_demand_play_handler(GstElement *elem)
{
GstPlayOnDemand *filter = GST_PLAYONDEMAND(elem);
register guint i;
for (i = 0; i < POD_MAX_PLAYS; i++) {
if (filter->plays[i] == G_MAXUINT) {
filter->plays[i] = filter->start;
break;
}
}
}
static void
play_on_demand_reset_handler(GstElement *elem)
{
GstPlayOnDemand *filter = GST_PLAYONDEMAND(elem);
register guint i;
for (i = 0; i < POD_MAX_PLAYS; i++) {
filter->plays[i] = G_MAXUINT;
}
filter->start = 0;
filter->write = 0;
}
static void
play_on_demand_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
{
GstPlayOnDemand *filter;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail(GST_IS_PLAYONDEMAND(object));
filter = GST_PLAYONDEMAND(object);
switch (prop_id) {
case ARG_BUFFERSIZE:
filter->buffer_size = g_value_get_uint(value);
/* reallocate space for the buffer with the new size values. */
g_free(filter->buffer);
filter->buffer = g_new(gchar, filter->buffer_size);
/* reset the play pointers and read/write indexes. */
play_on_demand_reset_handler(GST_ELEMENT(filter));
break;
case ARG_SILENT:
filter->silent = g_value_get_boolean(value);
break;
case ARG_FOLLOWTAIL:
filter->follow_stream_tail = g_value_get_boolean(value);
play_on_demand_reset_handler(GST_ELEMENT(filter));
break;
default:
break;
}
}
static void
play_on_demand_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
{
GstPlayOnDemand *filter;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail(GST_IS_PLAYONDEMAND(object));
filter = GST_PLAYONDEMAND(object);
switch (prop_id) {
case ARG_BUFFERSIZE:
g_value_set_uint(value, filter->buffer_size);
break;
case ARG_SILENT:
g_value_set_boolean(value, filter->silent);
break;
case ARG_FOLLOWTAIL:
g_value_set_boolean(value, filter->follow_stream_tail);
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_element_factory_new("playondemand",
GST_TYPE_PLAYONDEMAND,
&play_on_demand_details);
g_return_val_if_fail(factory != NULL, FALSE);
gst_element_factory_add_pad_template(factory, play_on_demand_src_factory());
gst_element_factory_add_pad_template(factory, play_on_demand_sink_factory());
gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE(factory));
return TRUE;
}
GstPluginDesc plugin_desc = {
GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"playondemand",
plugin_init
};