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removesilence: add properties to detect silence only after minimum silence time/buffers

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Closes #63
This commit is contained in:
Nicola Murino 2018-11-26 16:39:16 +01:00
parent ef3da2787a
commit e549566969
2 changed files with 67 additions and 3 deletions
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66
gst/removesilence/gstremovesilence.c
View file

@ -46,6 +46,12 @@
GST_DEBUG_CATEGORY_STATIC (gst_remove_silence_debug);
#define GST_CAT_DEFAULT gst_remove_silence_debug
#define DEFAULT_VAD_HYSTERESIS 480 /* 60 mseg */
#define MINIMUM_SILENCE_BUFFERS_MIN 0
#define MINIMUM_SILENCE_BUFFERS_MAX 10000
#define MINIMUM_SILENCE_BUFFERS_DEF 0
#define MINIMUM_SILENCE_TIME_MIN 0
#define MINIMUM_SILENCE_TIME_MAX 10000000000
#define MINIMUM_SILENCE_TIME_DEF 0
/* Filter signals and args */
enum
@ -60,7 +66,9 @@ enum
PROP_REMOVE,
PROP_HYSTERESIS,
PROP_SQUASH,
PROP_SILENT
PROP_SILENT,
PROP_MINIMUM_SILENCE_BUFFERS,
PROP_MINIMUM_SILENCE_TIME
};
@ -134,6 +142,21 @@ gst_remove_silence_class_init (GstRemoveSilenceClass * klass)
"Disable/enable bus message notifications for silent detected/finished",
TRUE, G_PARAM_READWRITE));
g_object_class_install_property (gobject_class, PROP_MINIMUM_SILENCE_BUFFERS,
g_param_spec_uint ("minimum-silence-buffers", "Minimum silence buffers",
"Define the minimum number of consecutive silence buffers before "
"removing silence, 0 means disabled",
MINIMUM_SILENCE_BUFFERS_MIN, MINIMUM_SILENCE_BUFFERS_MAX,
MINIMUM_SILENCE_BUFFERS_DEF, G_PARAM_READWRITE));
g_object_class_install_property (gobject_class, PROP_MINIMUM_SILENCE_TIME,
g_param_spec_uint64 ("minimum_silence_time",
"Minimum silence time",
"Define the minimum silence time in nanoseconds before removing "
" silence, 0 means disabled",
MINIMUM_SILENCE_TIME_MIN, MINIMUM_SILENCE_TIME_MAX,
MINIMUM_SILENCE_TIME_DEF, G_PARAM_READWRITE));
gst_element_class_set_static_metadata (gstelement_class,
"RemoveSilence",
"Filter/Effect/Audio",
@ -163,6 +186,10 @@ gst_remove_silence_init (GstRemoveSilence * filter)
filter->ts_offset = 0;
filter->silence_detected = FALSE;
filter->silent = TRUE;
filter->consecutive_silence_buffers = 0;
filter->minimum_silence_buffers = MINIMUM_SILENCE_BUFFERS_DEF;
filter->minimum_silence_time = MINIMUM_SILENCE_TIME_DEF;
filter->consecutive_silence_time = 0;
if (!filter->vad) {
GST_DEBUG ("Error initializing VAD !!");
@ -200,6 +227,12 @@ gst_remove_silence_set_property (GObject * object, guint prop_id,
case PROP_SILENT:
filter->silent = g_value_get_boolean (value);
break;
case PROP_MINIMUM_SILENCE_BUFFERS:
filter->minimum_silence_buffers = g_value_get_uint (value);
break;
case PROP_MINIMUM_SILENCE_TIME:
filter->minimum_silence_time = g_value_get_uint64 (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
@ -225,6 +258,12 @@ gst_remove_silence_get_property (GObject * object, guint prop_id,
case PROP_SILENT:
g_value_set_boolean (value, filter->silent);
break;
case PROP_MINIMUM_SILENCE_BUFFERS:
g_value_set_uint (value, filter->minimum_silence_buffers);
break;
case PROP_MINIMUM_SILENCE_TIME:
g_value_set_uint64 (value, filter->minimum_silence_time);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
@ -237,6 +276,7 @@ gst_remove_silence_transform_ip (GstBaseTransform * trans, GstBuffer * inbuf)
GstRemoveSilence *filter = NULL;
int frame_type;
GstMapInfo map;
gboolean consecutive_silence_reached;
filter = GST_REMOVE_SILENCE (trans);
@ -247,7 +287,25 @@ gst_remove_silence_transform_ip (GstBaseTransform * trans, GstBuffer * inbuf)
if (frame_type == VAD_SILENCE) {
GST_DEBUG ("Silence detected");
if (!filter->silence_detected) {
filter->consecutive_silence_buffers++;
if (GST_BUFFER_DURATION_IS_VALID (inbuf)) {
filter->consecutive_silence_time += inbuf->duration;
} else {
GST_WARNING
("Invalid buffer duration, consecutive_silence_time update not possible");
}
if (filter->minimum_silence_buffers == 0
&& filter->minimum_silence_time == 0) {
consecutive_silence_reached = TRUE;
} else {
consecutive_silence_reached =
(filter->minimum_silence_buffers > 0
&& filter->consecutive_silence_buffers >=
filter->minimum_silence_buffers)
|| (filter->minimum_silence_time > 0
&& filter->consecutive_silence_time >= filter->minimum_silence_time);
}
if (!filter->silence_detected && consecutive_silence_reached) {
if (!filter->silent) {
if (GST_BUFFER_PTS_IS_VALID (inbuf)) {
GstStructure *s;
@ -261,7 +319,7 @@ gst_remove_silence_transform_ip (GstBaseTransform * trans, GstBuffer * inbuf)
filter->silence_detected = TRUE;
}
if (filter->remove) {
if (filter->remove && consecutive_silence_reached) {
GST_DEBUG ("Removing silence");
if (filter->squash) {
if (GST_BUFFER_DURATION_IS_VALID (inbuf)) {
@ -274,6 +332,8 @@ gst_remove_silence_transform_ip (GstBaseTransform * trans, GstBuffer * inbuf)
}
} else {
filter->consecutive_silence_buffers = 0;
filter->consecutive_silence_time = 0;
if (filter->silence_detected) {
if (!filter->silent) {
if (GST_BUFFER_PTS_IS_VALID (inbuf)) {

4
gst/removesilence/gstremovesilence.h
View file

@ -48,6 +48,10 @@ typedef struct _GstRemoveSilence {
guint64 ts_offset;
gboolean silence_detected;
gboolean silent;
guint64 consecutive_silence_buffers;
guint16 minimum_silence_buffers;
guint64 consecutive_silence_time;
guint64 minimum_silence_time;
} GstRemoveSilence;
typedef struct _GstRemoveSilenceClass {