Created
February 27, 2013 10:33
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Bug in GStreamer Python Bindings in gst.parse_bin_from_description
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/* | |
gcc stress_simple.c `pkg-config --cflags --libs gstreamer-0.10 gtk+-2.0` | |
*/ | |
#include <gst/gst.h> | |
#include <gtk/gtk.h> | |
typedef struct _CustomData { | |
GstElement *pipeline; | |
int s; | |
} CustomData; | |
static GstElement *test_gst_element_factory_make() { | |
GstElement *pipeline, *bin; | |
GstElement *source, *sink; | |
pipeline = gst_pipeline_new ("test-pipeline"); | |
bin = gst_bin_new ("test-bin"); | |
source = gst_element_factory_make ("videotestsrc", "source"); | |
sink = gst_element_factory_make ("autovideosink", "sink"); | |
gst_bin_add_many (GST_BIN (bin), source, sink, NULL); | |
gst_bin_add_many (GST_BIN (pipeline), bin, NULL); | |
return pipeline; | |
} | |
static GstElement *test_gst_parse_launch() { | |
GstElement *pipeline, *bin; | |
GstElement *source, *sink; | |
pipeline = gst_pipeline_new ("test-pipeline"); | |
bin = gst_parse_launch ("(audiotestsrc ! alsasink)", NULL); | |
gst_bin_add_many (GST_BIN (pipeline), bin, NULL); | |
return pipeline; | |
} | |
static GstElement *test_gst_parse_bin_from_description() { | |
GstElement *pipeline, *bin; | |
GstElement *source, *sink; | |
GError *err = NULL; | |
pipeline = gst_pipeline_new ("test-pipeline"); | |
bin = gst_parse_bin_from_description ("audiotestsrc ! alsasink", FALSE, &err); | |
gst_bin_add_many (GST_BIN (pipeline), bin, NULL); | |
return pipeline; | |
} | |
void record(GstElement *pipeline) { | |
gst_element_set_state (pipeline, GST_STATE_PLAYING); | |
} | |
void stop(GstElement *pipeline) { | |
gst_element_set_state (pipeline, GST_STATE_NULL); | |
} | |
static int loop(CustomData *data) { | |
printf("Tengo %d\n", data->s); | |
if (data->s == 0) { | |
printf("init\n"); | |
data->s = 1; | |
data->pipeline = test_gst_parse_bin_from_description(); | |
}else if(data->s == 1) { | |
printf("record\n"); | |
data->s = 2; | |
record(data->pipeline); | |
}else if(data->s == 2) { | |
printf("stop\n"); | |
data->s = 3; | |
stop(data->pipeline); | |
}else if(data->s == 3) { | |
printf("null\n"); | |
data->s = 0; | |
gst_object_unref (data->pipeline); | |
} | |
return 1; | |
} | |
int main(int argc, char *argv[]) { | |
CustomData data; | |
/* Initialize GStreamer */ | |
gst_init (&argc, &argv); | |
printf("start\n"); | |
g_timeout_add_seconds (1, (GSourceFunc)loop, &data); | |
gtk_main (); | |
gst_object_unref(data.pipeline); | |
return 0; | |
} |
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#!/usr/bin/env python | |
# -*- coding:utf-8 -*- | |
""" | |
TO see the bug: | |
$cd /proc/`pgrep python`/fd; while true; do ls | wc -l; sleep 1; done | |
""" | |
import gst | |
import gtk | |
import gobject | |
class Test(): | |
def __init__(self): | |
# Build the pipeline | |
self.pipeline = gst.Pipeline() | |
aux = "audiotestsrc ! alsasink" | |
self.bin = gst.parse_bin_from_description(aux, False) | |
self.pipeline.add(self.bin) | |
def __del__(self): | |
print "__del__" | |
def record(self): | |
self.pipeline.set_state(gst.STATE_PLAYING) | |
def stop(self): | |
self.pipeline.set_state(gst.STATE_NULL) | |
t = None | |
s = 0 | |
def test(): | |
global t, s | |
print "Loop:" | |
if s == 0: | |
print " 1.- Preview" | |
s = 1 | |
t = Test() | |
elif s == 1: | |
print " 2.- Record" | |
s = 2 | |
t.record() | |
elif s == 2: | |
print " 3.- Stop" | |
s = 0 | |
t.stop() | |
return True | |
gobject.timeout_add_seconds(1, test) | |
gtk.main() |
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#!/usr/bin/env python | |
# -*- coding:utf-8 -*- | |
""" | |
TO see the bug: | |
$cd /proc/`pgrep python`/fd; while true; do ls | wc -l; sleep 1; done | |
""" | |
import gst | |
import gtk | |
import gobject | |
class Test(): | |
def __init__(self): | |
# Build the pipeline | |
self.pipeline = gst.Pipeline() | |
src = gst.element_factory_make('audiotestsrc') | |
sink = gst.element_factory_make('alsasink') | |
mbin = gst.Bin() | |
mbin.add(src, sink) | |
self.pipeline.add(mbin) | |
src.link(sink) | |
def __del__(self): | |
print "__del__" | |
def record(self): | |
self.pipeline.set_state(gst.STATE_PLAYING) | |
def stop(self): | |
self.pipeline.set_state(gst.STATE_NULL) | |
t = None | |
s = 0 | |
def test(): | |
global t, s | |
print "Loop:" | |
if s == 0: | |
print " 1.- Preview" | |
s = 1 | |
t = Test() | |
elif s == 1: | |
print " 2.- Record" | |
s = 2 | |
t.record() | |
elif s == 2: | |
print " 3.- Stop" | |
s = 0 | |
t.stop() | |
return True | |
gobject.timeout_add_seconds(1, test) | |
gtk.main() |
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#!/usr/bin/env python | |
# -*- coding:utf-8 -*- | |
""" | |
TO see the bug: | |
$cd /proc/`pgrep python`/fd; while true; do ls | wc -l; sleep 1; done | |
""" | |
import gst | |
import gtk | |
import gobject | |
class Test(): | |
def __init__(self): | |
# Build the pipeline | |
self.pipeline = gst.Pipeline() | |
aux = "(audiotestsrc ! alsasink)" | |
self.bin = gst.parse_launch(aux) | |
self.pipeline.add(self.bin) | |
def __del__(self): | |
print "__del__" | |
def record(self): | |
self.pipeline.set_state(gst.STATE_PLAYING) | |
def stop(self): | |
self.pipeline.set_state(gst.STATE_NULL) | |
t = None | |
s = 0 | |
def test(): | |
global t, s | |
print "Loop:" | |
if s == 0: | |
print " 1.- Preview" | |
s = 1 | |
t = Test() | |
elif s == 1: | |
print " 2.- Record" | |
s = 2 | |
t.record() | |
elif s == 2: | |
print " 3.- Stop" | |
s = 0 | |
t.stop() | |
return True | |
gobject.timeout_add_seconds(1, test) | |
gtk.main() |
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