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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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Added an example audio mixer.
Original commit message from CVS: Added an example audio mixer.
This commit is contained in:
Wim Taymans
parent
3c7dde9ad4
commit
d0921a2897
8 changed files with 354 additions and 4 deletions
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@ -9,8 +9,10 @@ gst_play_have_type (GstElement *sink, GstElement *sink2, gpointer data)
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*(gboolean *)data = TRUE;
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}
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gboolean idle_func(gpointer data) {
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return gst_bin_iterate(GST_BIN(data));
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gboolean
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idle_func (gpointer data)
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{
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return gst_bin_iterate (GST_BIN (data));
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}
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static GstCaps*
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1
examples/mixer/.gitignore
vendored
Normal file
1
examples/mixer/.gitignore
vendored
Normal file
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@ -0,0 +1 @@
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helloworld
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4
examples/mixer/Makefile.am
Normal file
4
examples/mixer/Makefile.am
Normal file
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@ -0,0 +1,4 @@
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noinst_PROGRAMS = mixer
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LIBS += $(GST_LIBS)
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CFLAGS += $(GST_CFLAGS)
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168
examples/mixer/mixer.c
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168
examples/mixer/mixer.c
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@ -0,0 +1,168 @@
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#include <stdlib.h>
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#include <gst/gst.h>
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gboolean playing;
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/* example based on helloworld by thomas@apestaart.org
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demonstrates the adder plugin and the volume envelope plugin */
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/* eos will be called when the src element has an end of stream */
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void eos(GstElement *element)
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{
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g_print("have eos, quitting\n");
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playing = FALSE;
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}
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int main(int argc,char *argv[])
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{
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GstElement *bin_in1, *bin_in2, *main_bin;
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GstElement *disksrc1, *decoder1, *volenv1;
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GstElement *disksrc2, *decoder2, *volenv2;
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GstElement *adder;
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GstElement *audiosink;
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GstPad *pad; /* to request pads for the adder */
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gst_init(&argc,&argv);
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if (argc != 3) {
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g_print("usage: %s <filename1> <filename2>\n", argv[0]);
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exit(-1);
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}
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/* create input bins */
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/* create bins to hold the input elements */
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bin_in1 = gst_bin_new("bin");
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bin_in2 = gst_bin_new("bin");
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/* first input bin */
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/* create elements */
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disksrc1 = gst_elementfactory_make("disksrc", "disk_source1");
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gtk_object_set(GTK_OBJECT(disksrc1),"location", argv[1],NULL);
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gtk_signal_connect(GTK_OBJECT(disksrc1),"eos",
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GTK_SIGNAL_FUNC(eos),NULL);
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decoder1 = gst_elementfactory_make("mad","decoder1");
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volenv1 = gst_elementfactory_make("volenv", "volume1");
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/* add to the bin */
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gst_bin_add(GST_BIN(bin_in1), disksrc1);
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gst_bin_add(GST_BIN(bin_in1), decoder1);
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gst_bin_add(GST_BIN(bin_in1), volenv1);
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/* connect elements */
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gst_pad_connect(gst_element_get_pad(disksrc1,"src"),
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gst_element_get_pad(decoder1,"sink"));
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gst_pad_connect(gst_element_get_pad(decoder1,"src"),
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gst_element_get_pad(volenv1,"sink"));
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/* add a ghost pad */
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gst_element_add_ghost_pad (bin_in1, gst_element_get_pad (volenv1, "src"), "channel1");
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/* second input bin */
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/* create elements */
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disksrc2 = gst_elementfactory_make("disksrc", "disk_source2");
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gtk_object_set(GTK_OBJECT(disksrc2),"location", argv[2],NULL);
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gtk_signal_connect(GTK_OBJECT(disksrc2),"eos",
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GTK_SIGNAL_FUNC(eos),NULL);
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decoder2 = gst_elementfactory_make("mad","decoder2");
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volenv2 = gst_elementfactory_make("volenv", "volume2");
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/* add to the bin */
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gst_bin_add(GST_BIN(bin_in2), disksrc2);
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gst_bin_add(GST_BIN(bin_in2), decoder2);
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gst_bin_add(GST_BIN(bin_in2), volenv2);
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/* connect elements */
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gst_pad_connect(gst_element_get_pad(disksrc2,"src"),
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gst_element_get_pad(decoder2,"sink"));
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gst_pad_connect(gst_element_get_pad(decoder2,"src"),
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gst_element_get_pad(volenv2,"sink"));
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/* add a ghost pad */
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gst_element_add_ghost_pad (bin_in2, gst_element_get_pad (volenv2, "src"), "channel2");
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/* create adder */
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adder = gst_elementfactory_make("adder", "adderel");
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/* create an audio sink */
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audiosink = gst_elementfactory_make("esdsink", "play_audio");
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/* now create main bin */
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main_bin = gst_bin_new("bin");
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gst_bin_add(GST_BIN(main_bin), bin_in1);
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gst_bin_add(GST_BIN(main_bin), bin_in2);
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gst_bin_add(GST_BIN(main_bin), adder);
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gst_bin_add(GST_BIN(main_bin), audiosink);
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/* request pads and connect to adder */
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pad = gst_element_request_pad_by_name (adder, "sink%d");
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g_print ("new pad %s\n", gst_pad_get_name (pad));
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gst_pad_connect (gst_element_get_pad (bin_in1, "channel1"), pad);
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pad = gst_element_request_pad_by_name (adder, "sink%d");
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g_print ("new pad %s\n", gst_pad_get_name (pad));
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gst_pad_connect (gst_element_get_pad (bin_in2, "channel2"), pad);
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/* connect adder and audiosink */
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gst_pad_connect(gst_element_get_pad(adder,"src"),
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gst_element_get_pad(audiosink,"sink"));
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/* register the volume envelope */
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gtk_object_set(GTK_OBJECT(volenv1), "controlpoint", "0:0.0001", NULL);
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gtk_object_set(GTK_OBJECT(volenv1), "controlpoint", "2:1", NULL);
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gtk_object_set(GTK_OBJECT(volenv1), "controlpoint", "4:1", NULL);
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gtk_object_set(GTK_OBJECT(volenv1), "controlpoint", "5:.1", NULL);
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gtk_object_set(GTK_OBJECT(volenv1), "controlpoint", "6:1", NULL);
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gtk_object_set(GTK_OBJECT(volenv1), "controlpoint", "7:.1", NULL);
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gtk_object_set(GTK_OBJECT(volenv1), "controlpoint", "8:1", NULL);
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gtk_object_set(GTK_OBJECT(volenv1), "controlpoint", "15:0.8", NULL);
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gtk_object_set(GTK_OBJECT(volenv2), "controlpoint", "0:0.001", NULL);
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gtk_object_set(GTK_OBJECT(volenv2), "controlpoint", "4:0.001", NULL);
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gtk_object_set(GTK_OBJECT(volenv2), "controlpoint", "5:1", NULL);
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gtk_object_set(GTK_OBJECT(volenv2), "controlpoint", "6:.1", NULL);
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gtk_object_set(GTK_OBJECT(volenv2), "controlpoint", "7:1", NULL);
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gtk_object_set(GTK_OBJECT(volenv2), "controlpoint", "8:.1", NULL);
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gtk_object_set(GTK_OBJECT(volenv2), "controlpoint", "15:0.001", NULL);
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/* start playing */
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gst_element_set_state(main_bin, GST_STATE_PLAYING);
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playing = TRUE;
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while (playing) {
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gst_bin_iterate(GST_BIN(main_bin));
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}
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/* stop the bin */
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gst_element_set_state(main_bin, GST_STATE_NULL);
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gst_object_destroy(GST_OBJECT(audiosink));
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gst_object_destroy(GST_OBJECT(disksrc1));
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gst_object_destroy(GST_OBJECT(decoder1));
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gst_object_destroy(GST_OBJECT(volenv1));
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gst_object_destroy(GST_OBJECT(disksrc2));
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gst_object_destroy(GST_OBJECT(decoder2));
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gst_object_destroy(GST_OBJECT(volenv2));
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gst_object_destroy(GST_OBJECT(bin_in1));
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gst_object_destroy(GST_OBJECT(bin_in2));
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gst_object_destroy(GST_OBJECT(main_bin));
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exit(0);
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}
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@ -9,8 +9,10 @@ gst_play_have_type (GstElement *sink, GstElement *sink2, gpointer data)
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*(gboolean *)data = TRUE;
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}
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gboolean idle_func(gpointer data) {
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return gst_bin_iterate(GST_BIN(data));
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gboolean
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idle_func (gpointer data)
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{
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return gst_bin_iterate (GST_BIN (data));
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}
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static GstCaps*
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1
tests/old/examples/mixer/.gitignore
vendored
Normal file
1
tests/old/examples/mixer/.gitignore
vendored
Normal file
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@ -0,0 +1 @@
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helloworld
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4
tests/old/examples/mixer/Makefile.am
Normal file
4
tests/old/examples/mixer/Makefile.am
Normal file
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@ -0,0 +1,4 @@
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noinst_PROGRAMS = mixer
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LIBS += $(GST_LIBS)
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CFLAGS += $(GST_CFLAGS)
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168
tests/old/examples/mixer/mixer.c
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168
tests/old/examples/mixer/mixer.c
Normal file
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@ -0,0 +1,168 @@
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#include <stdlib.h>
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#include <gst/gst.h>
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gboolean playing;
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/* example based on helloworld by thomas@apestaart.org
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demonstrates the adder plugin and the volume envelope plugin */
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/* eos will be called when the src element has an end of stream */
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void eos(GstElement *element)
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{
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g_print("have eos, quitting\n");
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playing = FALSE;
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}
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int main(int argc,char *argv[])
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{
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GstElement *bin_in1, *bin_in2, *main_bin;
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GstElement *disksrc1, *decoder1, *volenv1;
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GstElement *disksrc2, *decoder2, *volenv2;
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GstElement *adder;
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GstElement *audiosink;
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GstPad *pad; /* to request pads for the adder */
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gst_init(&argc,&argv);
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if (argc != 3) {
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g_print("usage: %s <filename1> <filename2>\n", argv[0]);
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exit(-1);
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}
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/* create input bins */
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/* create bins to hold the input elements */
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bin_in1 = gst_bin_new("bin");
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bin_in2 = gst_bin_new("bin");
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/* first input bin */
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/* create elements */
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disksrc1 = gst_elementfactory_make("disksrc", "disk_source1");
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gtk_object_set(GTK_OBJECT(disksrc1),"location", argv[1],NULL);
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gtk_signal_connect(GTK_OBJECT(disksrc1),"eos",
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GTK_SIGNAL_FUNC(eos),NULL);
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decoder1 = gst_elementfactory_make("mad","decoder1");
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volenv1 = gst_elementfactory_make("volenv", "volume1");
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/* add to the bin */
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gst_bin_add(GST_BIN(bin_in1), disksrc1);
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gst_bin_add(GST_BIN(bin_in1), decoder1);
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gst_bin_add(GST_BIN(bin_in1), volenv1);
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/* connect elements */
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gst_pad_connect(gst_element_get_pad(disksrc1,"src"),
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gst_element_get_pad(decoder1,"sink"));
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gst_pad_connect(gst_element_get_pad(decoder1,"src"),
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gst_element_get_pad(volenv1,"sink"));
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/* add a ghost pad */
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gst_element_add_ghost_pad (bin_in1, gst_element_get_pad (volenv1, "src"), "channel1");
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/* second input bin */
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/* create elements */
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disksrc2 = gst_elementfactory_make("disksrc", "disk_source2");
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gtk_object_set(GTK_OBJECT(disksrc2),"location", argv[2],NULL);
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gtk_signal_connect(GTK_OBJECT(disksrc2),"eos",
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GTK_SIGNAL_FUNC(eos),NULL);
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decoder2 = gst_elementfactory_make("mad","decoder2");
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volenv2 = gst_elementfactory_make("volenv", "volume2");
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/* add to the bin */
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gst_bin_add(GST_BIN(bin_in2), disksrc2);
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gst_bin_add(GST_BIN(bin_in2), decoder2);
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gst_bin_add(GST_BIN(bin_in2), volenv2);
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/* connect elements */
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gst_pad_connect(gst_element_get_pad(disksrc2,"src"),
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gst_element_get_pad(decoder2,"sink"));
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gst_pad_connect(gst_element_get_pad(decoder2,"src"),
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gst_element_get_pad(volenv2,"sink"));
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/* add a ghost pad */
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gst_element_add_ghost_pad (bin_in2, gst_element_get_pad (volenv2, "src"), "channel2");
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/* create adder */
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adder = gst_elementfactory_make("adder", "adderel");
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/* create an audio sink */
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audiosink = gst_elementfactory_make("esdsink", "play_audio");
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/* now create main bin */
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main_bin = gst_bin_new("bin");
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gst_bin_add(GST_BIN(main_bin), bin_in1);
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gst_bin_add(GST_BIN(main_bin), bin_in2);
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gst_bin_add(GST_BIN(main_bin), adder);
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gst_bin_add(GST_BIN(main_bin), audiosink);
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/* request pads and connect to adder */
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pad = gst_element_request_pad_by_name (adder, "sink%d");
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g_print ("new pad %s\n", gst_pad_get_name (pad));
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gst_pad_connect (gst_element_get_pad (bin_in1, "channel1"), pad);
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pad = gst_element_request_pad_by_name (adder, "sink%d");
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g_print ("new pad %s\n", gst_pad_get_name (pad));
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gst_pad_connect (gst_element_get_pad (bin_in2, "channel2"), pad);
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/* connect adder and audiosink */
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gst_pad_connect(gst_element_get_pad(adder,"src"),
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gst_element_get_pad(audiosink,"sink"));
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/* register the volume envelope */
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gtk_object_set(GTK_OBJECT(volenv1), "controlpoint", "0:0.0001", NULL);
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gtk_object_set(GTK_OBJECT(volenv1), "controlpoint", "2:1", NULL);
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gtk_object_set(GTK_OBJECT(volenv1), "controlpoint", "4:1", NULL);
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gtk_object_set(GTK_OBJECT(volenv1), "controlpoint", "5:.1", NULL);
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gtk_object_set(GTK_OBJECT(volenv1), "controlpoint", "6:1", NULL);
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gtk_object_set(GTK_OBJECT(volenv1), "controlpoint", "7:.1", NULL);
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gtk_object_set(GTK_OBJECT(volenv1), "controlpoint", "8:1", NULL);
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gtk_object_set(GTK_OBJECT(volenv1), "controlpoint", "15:0.8", NULL);
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gtk_object_set(GTK_OBJECT(volenv2), "controlpoint", "0:0.001", NULL);
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gtk_object_set(GTK_OBJECT(volenv2), "controlpoint", "4:0.001", NULL);
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gtk_object_set(GTK_OBJECT(volenv2), "controlpoint", "5:1", NULL);
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gtk_object_set(GTK_OBJECT(volenv2), "controlpoint", "6:.1", NULL);
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gtk_object_set(GTK_OBJECT(volenv2), "controlpoint", "7:1", NULL);
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gtk_object_set(GTK_OBJECT(volenv2), "controlpoint", "8:.1", NULL);
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gtk_object_set(GTK_OBJECT(volenv2), "controlpoint", "15:0.001", NULL);
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/* start playing */
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gst_element_set_state(main_bin, GST_STATE_PLAYING);
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playing = TRUE;
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while (playing) {
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gst_bin_iterate(GST_BIN(main_bin));
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}
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/* stop the bin */
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gst_element_set_state(main_bin, GST_STATE_NULL);
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gst_object_destroy(GST_OBJECT(audiosink));
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gst_object_destroy(GST_OBJECT(disksrc1));
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gst_object_destroy(GST_OBJECT(decoder1));
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gst_object_destroy(GST_OBJECT(volenv1));
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gst_object_destroy(GST_OBJECT(disksrc2));
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gst_object_destroy(GST_OBJECT(decoder2));
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gst_object_destroy(GST_OBJECT(volenv2));
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gst_object_destroy(GST_OBJECT(bin_in1));
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gst_object_destroy(GST_OBJECT(bin_in2));
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gst_object_destroy(GST_OBJECT(main_bin));
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exit(0);
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}
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