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/*
* audio-trickplay.c
*
* Builds a pipeline with two audiotestsources mixed with adder. Assigns
* controller patterns to the audio generators and test various trick modes.
*
* There are currently several issues:
* - adder only work with flushing seeks
* - there is a gap of almost 4 seconds before backwards playback
* - it is "waiting for free space"
* - using sync=false on the sink does not help (but has some other weird effects)
* - using fakesink shows same behaviour
*
* GST_DEBUG_NO_COLOR=1 GST_DEBUG="*:2,default:3,*sink*:4,*ring*:4,*pulse*:5" ./audio-trickplay 2>log.txt
* GST_DEBUG_NO_COLOR=1 GST_DEBUG="*:2,default:3,*sink*:4,*ring*:4,*pulse*:5" ./audio-trickplay -a -f 2>log-af.txt
*/
#include <string.h>
#include <gst/gst.h>
#include <gst/controller/gstinterpolationcontrolsource.h>
static void
check_position (GstElement * elem, GstQuery * pos, const gchar * info)
{
if (gst_element_query (elem, pos)) {
gint64 play_pos;
gst_query_parse_position (pos, NULL, &play_pos);
GST_INFO ("pos : %" GST_TIME_FORMAT " %s", GST_TIME_ARGS (play_pos), info);
} else {
GST_WARNING ("position query failed");
}
}
static GstPadProbeReturn
print_buffer_ts (GstPad * pad, GstPadProbeInfo * info, gpointer user_data)
{
GstBuffer *buffer = GST_PAD_PROBE_INFO_BUFFER (info);
GST_DEBUG_OBJECT (pad, " ts: %" GST_TIME_FORMAT,
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buffer)));
return GST_PAD_PROBE_OK;
}
gint
main (gint argc, gchar ** argv)
{
gint res = 1;
GstElement *src, *mix = NULL, *sink;
GstElement *bin;
GstInterpolationControlSource *csource1, *csource2;
GstTimedValueControlSource *cs;
GstClock *clock;
GstClockID clock_id;
GstClockReturn wait_ret;
GstEvent *pos_seek, *rate_seek1, *rate_seek2;
GstQuery *pos;
GstSeekFlags flags;
GstPad *src_pad;
/* options */
gboolean use_adder = FALSE;
gboolean use_flush = FALSE;
gboolean be_quiet = FALSE;
gst_init (&argc, &argv);
if (argc) {
gint arg;
for (arg = 0; arg < argc; arg++) {
if (!strcmp (argv[arg], "-a"))
use_adder = TRUE;
else if (!strcmp (argv[arg], "-f"))
use_flush = TRUE;
else if (!strcmp (argv[arg], "-q"))
be_quiet = 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 (!mix) {
GST_WARNING ("need adder from gst-plugins-base");
goto Error;
}
}
sink = gst_element_factory_make ((be_quiet ? "fakesink" : "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;
}
}
/* use 10 buffers per second */
g_object_set (src, "samplesperbuffer", 44100 / 10, NULL);
if (be_quiet) {
g_object_set (sink, "sync", TRUE, NULL);
}
src_pad = gst_element_get_static_pad (src, "src");
gst_pad_add_probe (src_pad, GST_PAD_PROBE_TYPE_BUFFER, print_buffer_ts, NULL,
NULL);
gst_object_unref (src_pad);
csource1 = gst_interpolation_control_source_new ();
csource2 = gst_interpolation_control_source_new ();
gst_object_add_control_binding (GST_OBJECT_CAST (src),
gst_control_binding_direct_new (GST_OBJECT_CAST (src), "volume",
GST_CONTROL_SOURCE (csource1)));
gst_object_add_control_binding (GST_OBJECT_CAST (src),
gst_control_binding_direct_new (GST_OBJECT_CAST (src), "freq",
GST_CONTROL_SOURCE (csource2)));
/* Set interpolation mode */
g_object_set (csource1, "mode", GST_INTERPOLATION_MODE_LINEAR, NULL);
g_object_set (csource2, "mode", GST_INTERPOLATION_MODE_LINEAR, NULL);
/* set control values */
cs = (GstTimedValueControlSource *) csource1;
gst_timed_value_control_source_set (cs, 0 * GST_SECOND, 0.0);
gst_timed_value_control_source_set (cs, 5 * GST_SECOND, 1.0);
gst_object_unref (csource1);
cs = (GstTimedValueControlSource *) csource2;
gst_timed_value_control_source_set (cs, 0 * GST_SECOND, 20000.0 / 220.0);
gst_timed_value_control_source_set (cs, 2 * GST_SECOND, 20000.0 / 3520.0);
gst_timed_value_control_source_set (cs, 6 * GST_SECOND, 20000.0 / 440.0);
gst_object_unref (csource2);
/* prepare events */
flags = use_flush ? GST_SEEK_FLAG_FLUSH : GST_SEEK_FLAG_NONE;
pos_seek = gst_event_new_seek (1.0, GST_FORMAT_TIME, flags,
GST_SEEK_TYPE_SET, 3 * GST_SECOND,
GST_SEEK_TYPE_NONE, GST_CLOCK_TIME_NONE);
rate_seek1 = gst_event_new_seek (0.5, GST_FORMAT_TIME, flags,
GST_SEEK_TYPE_NONE, GST_CLOCK_TIME_NONE,
GST_SEEK_TYPE_NONE, GST_CLOCK_TIME_NONE);
rate_seek2 = gst_event_new_seek (-1.0, GST_FORMAT_TIME, flags,
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) != GST_STATE_CHANGE_FAILURE) {
/* 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) != GST_STATE_CHANGE_FAILURE) {
check_position (bin, 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 (bin, 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 (bin, 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 (bin, pos, "before slow down rate change");
/* change playback rate to 0.5 */
if (!gst_element_send_event (sink, rate_seek1)) {
GST_WARNING ("element failed to change playback rate");
}
check_position (bin, pos, "after slow down 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 (bin, pos, "before reverse rate change");
/* change playback rate to -1.0 */
if (!gst_element_send_event (sink, rate_seek2)) {
GST_WARNING ("element failed to change playback rate");
}
check_position (bin, pos, "after reverse rate change");
/* run for 7 seconds */
clock_id =
gst_clock_new_single_shot_id (clock,
gst_clock_get_time (clock) + (7 * 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 (bin, pos, "done");
gst_element_set_state (bin, GST_STATE_NULL);
}
/* cleanup */
gst_query_unref (pos);
gst_object_unref (G_OBJECT (clock));
gst_object_unref (G_OBJECT (bin));
res = 0;
Error:
return (res);
}
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