gstreamer/tests/icles/audio-trickplay.c
2010-03-11 16:35:10 +01:00

203 lines
5.9 KiB
C

/*
* audio-trickplay.c
*
* Builds a pipeline with two audiotestsources mixed with adder. Assigns
* controller patterns to the audio generators and test various trick modes.
*/
#include <gst/gst.h>
#include <gst/controller/gstcontroller.h>
#include <gst/controller/gstinterpolationcontrolsource.h>
static void
check_position (GstElement * sink, GstQuery * pos, const gchar * info)
{
if (gst_element_query (sink, pos)) {
gint64 play_pos;
gst_query_parse_position (pos, NULL, &play_pos);
printf ("pos: %" GST_TIME_FORMAT " %s\n", GST_TIME_ARGS (play_pos), info);
} else {
GST_WARNING ("position query failed");
}
}
gint
main (gint argc, gchar ** argv)
{
gint res = 1;
GstElement *src, *mix = NULL, *sink;
GstElement *bin;
GstController *ctrl;
GstInterpolationControlSource *csource1, *csource2;
GstClock *clock;
GstClockID clock_id;
GstClockReturn wait_ret;
GValue vol = { 0, };
GstEvent *pos_seek, *rate_seek;
GstQuery *pos;
/* options */
gboolean use_adder = FALSE;
gst_init (&argc, &argv);
gst_controller_init (&argc, &argv);
if (argc) {
gint arg;
for (arg = 0; arg < argc; arg++) {
if (!strcmp (argv[arg], "-a"))
use_adder = TRUE;
}
}
/* build pipeline */
bin = gst_pipeline_new ("pipeline");
clock = gst_pipeline_get_clock (GST_PIPELINE (bin));
src = gst_element_factory_make ("audiotestsrc", NULL);
if (!src) {
GST_WARNING ("need audiotestsrc from gst-plugins-base");
goto Error;
}
if (use_adder) {
mix = gst_element_factory_make ("adder", NULL);
if (!src) {
GST_WARNING ("need adder from gst-plugins-base");
goto Error;
}
}
sink = gst_element_factory_make ("autoaudiosink", NULL);
if (!sink) {
GST_WARNING ("need autoaudiosink from gst-plugins-base");
goto Error;
}
if (use_adder) {
gst_bin_add_many (GST_BIN (bin), src, mix, sink, NULL);
if (!gst_element_link_many (src, mix, sink, NULL)) {
GST_WARNING ("can't link elements");
goto Error;
}
} else {
gst_bin_add_many (GST_BIN (bin), src, sink, NULL);
if (!gst_element_link_many (src, sink, NULL)) {
GST_WARNING ("can't link elements");
goto Error;
}
}
/* add a controller to the source */
if (!(ctrl = gst_controller_new (G_OBJECT (src), "freq", "volume", NULL))) {
GST_WARNING ("can't control source element");
goto Error;
}
csource1 = gst_interpolation_control_source_new ();
csource2 = gst_interpolation_control_source_new ();
gst_controller_set_control_source (ctrl, "volume",
GST_CONTROL_SOURCE (csource1));
gst_controller_set_control_source (ctrl, "freq",
GST_CONTROL_SOURCE (csource2));
/* Set interpolation mode */
gst_interpolation_control_source_set_interpolation_mode (csource1,
GST_INTERPOLATE_LINEAR);
gst_interpolation_control_source_set_interpolation_mode (csource2,
GST_INTERPOLATE_LINEAR);
/* set control values */
g_value_init (&vol, G_TYPE_DOUBLE);
g_value_set_double (&vol, 0.0);
gst_interpolation_control_source_set (csource1, 0 * GST_SECOND, &vol);
g_value_set_double (&vol, 1.0);
gst_interpolation_control_source_set (csource1, 5 * GST_SECOND, &vol);
g_object_unref (csource1);
g_value_set_double (&vol, 220.0);
gst_interpolation_control_source_set (csource2, 0 * GST_SECOND, &vol);
g_value_set_double (&vol, 3520.0);
gst_interpolation_control_source_set (csource2, 2 * GST_SECOND, &vol);
g_value_set_double (&vol, 440.0);
gst_interpolation_control_source_set (csource2, 6 * GST_SECOND, &vol);
g_object_unref (csource2);
/* prepare events */
pos_seek = gst_event_new_seek (1.0, GST_FORMAT_TIME, GST_SEEK_FLAG_NONE,
GST_SEEK_TYPE_SET, 3 * GST_SECOND,
GST_SEEK_TYPE_NONE, GST_CLOCK_TIME_NONE);
rate_seek = gst_event_new_seek (0.5, GST_FORMAT_TIME, GST_SEEK_FLAG_NONE,
GST_SEEK_TYPE_NONE, GST_CLOCK_TIME_NONE,
GST_SEEK_TYPE_NONE, GST_CLOCK_TIME_NONE);
/* prepare queries */
pos = gst_query_new_position (GST_FORMAT_TIME);
/* run the show */
if (gst_element_set_state (bin, GST_STATE_PAUSED)) {
/* run for 5 seconds */
clock_id =
gst_clock_new_single_shot_id (clock,
gst_clock_get_time (clock) + (5 * GST_SECOND));
if (gst_element_set_state (bin, GST_STATE_PLAYING)) {
check_position (sink, pos, "start");
if ((wait_ret = gst_clock_id_wait (clock_id, NULL)) != GST_CLOCK_OK) {
GST_WARNING ("clock_id_wait returned: %d", wait_ret);
}
}
gst_clock_id_unref (clock_id);
check_position (sink, pos, "before seek to new pos");
/* seek to 3:00 sec (back 2 sec) */
if (!gst_element_send_event (sink, pos_seek)) {
GST_WARNING ("element failed to seek to new position");
}
check_position (sink, pos, "after seek to new pos");
/* run for 2 seconds */
clock_id =
gst_clock_new_single_shot_id (clock,
gst_clock_get_time (clock) + (2 * GST_SECOND));
if ((wait_ret = gst_clock_id_wait (clock_id, NULL)) != GST_CLOCK_OK) {
GST_WARNING ("clock_id_wait returned: %d", wait_ret);
}
gst_clock_id_unref (clock_id);
check_position (sink, pos, "before rate change");
/* change playback rate */
if (!gst_element_send_event (sink, rate_seek)) {
GST_WARNING ("element failed to change playback rate");
}
check_position (sink, pos, "after rate change");
/* run for 4 seconds */
clock_id =
gst_clock_new_single_shot_id (clock,
gst_clock_get_time (clock) + (4 * GST_SECOND));
if ((wait_ret = gst_clock_id_wait (clock_id, NULL)) != GST_CLOCK_OK) {
GST_WARNING ("clock_id_wait returned: %d", wait_ret);
}
gst_clock_id_unref (clock_id);
check_position (sink, pos, "done");
gst_element_set_state (bin, GST_STATE_NULL);
}
/* cleanup */
gst_query_unref (pos);
g_object_unref (G_OBJECT (ctrl));
gst_object_unref (G_OBJECT (clock));
gst_object_unref (G_OBJECT (bin));
res = 0;
Error:
return (res);
}