--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/gst_plugins_good/gst/audiofx/audiopanorama.c Fri Apr 16 15:15:52 2010 +0300
@@ -0,0 +1,648 @@
+/*
+ * GStreamer
+ * Copyright (C) 2006 Stefan Kost <ensonic@users.sf.net>
+ * Copyright (C) 2006 Sebastian Dröge <slomo@circular-chaos.org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+/**
+ * SECTION:element-audiopanorama
+ *
+ * Stereo panorama effect with controllable pan position. One can choose between the default psychoacoustic panning method,
+ * which keeps the same perceived loudness, and a simple panning method that just controls the volume on one channel.
+ *
+ * <refsect2>
+ * <title>Example launch line</title>
+ * |[
+ * gst-launch audiotestsrc wave=saw ! audiopanorama panorama=-1.00 ! alsasink
+ * gst-launch filesrc location="melo1.ogg" ! oggdemux ! vorbisdec ! audioconvert ! audiopanorama panorama=-1.00 ! alsasink
+ * gst-launch audiotestsrc wave=saw ! audioconvert ! audiopanorama panorama=-1.00 ! audioconvert ! alsasink
+ * gst-launch audiotestsrc wave=saw ! audioconvert ! audiopanorama method=simple panorama=-0.50 ! audioconvert ! alsasink
+ * ]|
+ * </refsect2>
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <gst/gst.h>
+#include <gst/base/gstbasetransform.h>
+#include <gst/controller/gstcontroller.h>
+
+#include "audiopanorama.h"
+
+#define GST_CAT_DEFAULT gst_audio_panorama_debug
+GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
+
+static const GstElementDetails element_details =
+GST_ELEMENT_DETAILS ("Stereo positioning",
+ "Filter/Effect/Audio",
+ "Positions audio streams in the stereo panorama",
+ "Stefan Kost <ensonic@users.sf.net>");
+
+/* Filter signals and args */
+enum
+{
+ /* FILL ME */
+ LAST_SIGNAL
+};
+
+enum
+{
+ PROP_0,
+ PROP_PANORAMA,
+ PROP_METHOD
+};
+
+enum
+{
+ METHOD_PSYCHOACOUSTIC = 0,
+ METHOD_SIMPLE,
+ NUM_METHODS
+};
+
+#define GST_TYPE_AUDIO_PANORAMA_METHOD (gst_audio_panorama_method_get_type ())
+static GType
+gst_audio_panorama_method_get_type (void)
+{
+ static GType gtype = 0;
+
+ if (gtype == 0) {
+ static const GEnumValue values[] = {
+ {METHOD_PSYCHOACOUSTIC, "Psychoacoustic Panning (default)",
+ "psychoacoustic"},
+ {METHOD_SIMPLE, "Simple Panning", "simple"},
+ {0, NULL, NULL}
+ };
+
+ gtype = g_enum_register_static ("GstAudioPanoramaMethod", values);
+ }
+ return gtype;
+}
+
+static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
+ GST_PAD_SINK,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS ("audio/x-raw-float, "
+ "rate = (int) [ 1, MAX ], "
+ "channels = (int) [ 1, 2 ], "
+ "endianness = (int) BYTE_ORDER, " "width = (int) 32; "
+ "audio/x-raw-int, "
+ "rate = (int) [ 1, MAX ], "
+ "channels = (int) [ 1, 2 ], "
+ "endianness = (int) BYTE_ORDER, "
+ "width = (int) 16, " "depth = (int) 16, " "signed = (boolean) true")
+ );
+
+static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
+ GST_PAD_SRC,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS ("audio/x-raw-float, "
+ "rate = (int) [ 1, MAX ], "
+ "channels = (int) 2, "
+ "endianness = (int) BYTE_ORDER, " "width = (int) 32; "
+ "audio/x-raw-int, "
+ "rate = (int) [ 1, MAX ], "
+ "channels = (int) 2, "
+ "endianness = (int) BYTE_ORDER, "
+ "width = (int) 16, " "depth = (int) 16, " "signed = (boolean) true")
+ );
+
+#define DEBUG_INIT(bla) \
+ GST_DEBUG_CATEGORY_INIT (gst_audio_panorama_debug, "audiopanorama", 0, "audiopanorama element");
+
+GST_BOILERPLATE_FULL (GstAudioPanorama, gst_audio_panorama, GstBaseTransform,
+ GST_TYPE_BASE_TRANSFORM, DEBUG_INIT);
+
+static void gst_audio_panorama_set_property (GObject * object, guint prop_id,
+ const GValue * value, GParamSpec * pspec);
+static void gst_audio_panorama_get_property (GObject * object, guint prop_id,
+ GValue * value, GParamSpec * pspec);
+
+static gboolean gst_audio_panorama_get_unit_size (GstBaseTransform * base,
+ GstCaps * caps, guint * size);
+static GstCaps *gst_audio_panorama_transform_caps (GstBaseTransform * base,
+ GstPadDirection direction, GstCaps * caps);
+static gboolean gst_audio_panorama_set_caps (GstBaseTransform * base,
+ GstCaps * incaps, GstCaps * outcaps);
+
+static void gst_audio_panorama_transform_m2s_int (GstAudioPanorama * filter,
+ gint16 * idata, gint16 * odata, guint num_samples);
+static void gst_audio_panorama_transform_s2s_int (GstAudioPanorama * filter,
+ gint16 * idata, gint16 * odata, guint num_samples);
+static void gst_audio_panorama_transform_m2s_float (GstAudioPanorama * filter,
+ gfloat * idata, gfloat * odata, guint num_samples);
+static void gst_audio_panorama_transform_s2s_float (GstAudioPanorama * filter,
+ gfloat * idata, gfloat * odata, guint num_samples);
+
+static void gst_audio_panorama_transform_m2s_int_simple (GstAudioPanorama *
+ filter, gint16 * idata, gint16 * odata, guint num_samples);
+static void gst_audio_panorama_transform_s2s_int_simple (GstAudioPanorama *
+ filter, gint16 * idata, gint16 * odata, guint num_samples);
+static void gst_audio_panorama_transform_m2s_float_simple (GstAudioPanorama *
+ filter, gfloat * idata, gfloat * odata, guint num_samples);
+static void gst_audio_panorama_transform_s2s_float_simple (GstAudioPanorama *
+ filter, gfloat * idata, gfloat * odata, guint num_samples);
+
+static GstFlowReturn gst_audio_panorama_transform (GstBaseTransform * base,
+ GstBuffer * inbuf, GstBuffer * outbuf);
+
+
+/* Table with processing functions: [channels][format][method] */
+static GstAudioPanoramaProcessFunc panorama_process_functions[2][2][2] = {
+ {
+ {(GstAudioPanoramaProcessFunc) gst_audio_panorama_transform_m2s_int,
+ (GstAudioPanoramaProcessFunc)
+ gst_audio_panorama_transform_m2s_int_simple},
+ {(GstAudioPanoramaProcessFunc) gst_audio_panorama_transform_m2s_float,
+ (GstAudioPanoramaProcessFunc)
+ gst_audio_panorama_transform_m2s_float_simple}
+ },
+ {
+ {(GstAudioPanoramaProcessFunc) gst_audio_panorama_transform_s2s_int,
+ (GstAudioPanoramaProcessFunc)
+ gst_audio_panorama_transform_s2s_int_simple},
+ {(GstAudioPanoramaProcessFunc) gst_audio_panorama_transform_s2s_float,
+ (GstAudioPanoramaProcessFunc)
+ gst_audio_panorama_transform_s2s_float_simple}
+ }
+};
+
+/* GObject vmethod implementations */
+
+static void
+gst_audio_panorama_base_init (gpointer klass)
+{
+ GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
+
+ gst_element_class_add_pad_template (element_class,
+ gst_static_pad_template_get (&src_template));
+ gst_element_class_add_pad_template (element_class,
+ gst_static_pad_template_get (&sink_template));
+ gst_element_class_set_details (element_class, &element_details);
+}
+
+static void
+gst_audio_panorama_class_init (GstAudioPanoramaClass * klass)
+{
+ GObjectClass *gobject_class;
+
+ gobject_class = (GObjectClass *) klass;
+ gobject_class->set_property = gst_audio_panorama_set_property;
+ gobject_class->get_property = gst_audio_panorama_get_property;
+
+ g_object_class_install_property (gobject_class, PROP_PANORAMA,
+ g_param_spec_float ("panorama", "Panorama",
+ "Position in stereo panorama (-1.0 left -> 1.0 right)", -1.0, 1.0,
+ 0.0, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE));
+ /**
+ * GstAudioPanorama:method
+ *
+ * Panning method: psychoacoustic mode keeps the same perceived loudness,
+ * while simple mode just controls the volume of one channel. It's merely
+ * a matter of taste which method should be chosen.
+ *
+ * Since: 0.10.6
+ **/
+ g_object_class_install_property (gobject_class, PROP_METHOD,
+ g_param_spec_enum ("method", "Panning method",
+ "Psychoacoustic mode keeps same perceived loudness, "
+ "simple mode just controls volume of one channel.",
+ GST_TYPE_AUDIO_PANORAMA_METHOD, METHOD_PSYCHOACOUSTIC,
+ G_PARAM_READWRITE));
+
+ GST_BASE_TRANSFORM_CLASS (klass)->get_unit_size =
+ GST_DEBUG_FUNCPTR (gst_audio_panorama_get_unit_size);
+ GST_BASE_TRANSFORM_CLASS (klass)->transform_caps =
+ GST_DEBUG_FUNCPTR (gst_audio_panorama_transform_caps);
+ GST_BASE_TRANSFORM_CLASS (klass)->set_caps =
+ GST_DEBUG_FUNCPTR (gst_audio_panorama_set_caps);
+ GST_BASE_TRANSFORM_CLASS (klass)->transform =
+ GST_DEBUG_FUNCPTR (gst_audio_panorama_transform);
+}
+
+static void
+gst_audio_panorama_init (GstAudioPanorama * filter,
+ GstAudioPanoramaClass * klass)
+{
+
+ filter->panorama = 0;
+ filter->method = METHOD_PSYCHOACOUSTIC;
+ filter->width = 0;
+ filter->channels = 0;
+ filter->format_float = FALSE;
+ filter->process = NULL;
+
+ gst_base_transform_set_gap_aware (GST_BASE_TRANSFORM (filter), TRUE);
+}
+
+static gboolean
+gst_audio_panorama_set_process_function (GstAudioPanorama * filter)
+{
+ gint channel_index, format_index, method_index;
+
+ /* set processing function */
+ channel_index = filter->channels - 1;
+ if (channel_index > 1 || channel_index < 0) {
+ filter->process = NULL;
+ return FALSE;
+ }
+
+ format_index = (filter->format_float) ? 1 : 0;
+
+ method_index = filter->method;
+ if (method_index >= NUM_METHODS || method_index < 0)
+ method_index = METHOD_PSYCHOACOUSTIC;
+
+ filter->process =
+ panorama_process_functions[channel_index][format_index][method_index];
+ return TRUE;
+}
+
+static void
+gst_audio_panorama_set_property (GObject * object, guint prop_id,
+ const GValue * value, GParamSpec * pspec)
+{
+ GstAudioPanorama *filter = GST_AUDIO_PANORAMA (object);
+
+ switch (prop_id) {
+ case PROP_PANORAMA:
+ filter->panorama = g_value_get_float (value);
+ break;
+ case PROP_METHOD:
+ filter->method = g_value_get_enum (value);
+ gst_audio_panorama_set_process_function (filter);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+gst_audio_panorama_get_property (GObject * object, guint prop_id,
+ GValue * value, GParamSpec * pspec)
+{
+ GstAudioPanorama *filter = GST_AUDIO_PANORAMA (object);
+
+ switch (prop_id) {
+ case PROP_PANORAMA:
+ g_value_set_float (value, filter->panorama);
+ break;
+ case PROP_METHOD:
+ g_value_set_enum (value, filter->method);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+/* GstBaseTransform vmethod implementations */
+
+static gboolean
+gst_audio_panorama_get_unit_size (GstBaseTransform * base, GstCaps * caps,
+ guint * size)
+{
+ gint width, channels;
+ GstStructure *structure;
+ gboolean ret;
+
+ g_assert (size);
+
+ /* this works for both float and int */
+ structure = gst_caps_get_structure (caps, 0);
+ ret = gst_structure_get_int (structure, "width", &width);
+ ret &= gst_structure_get_int (structure, "channels", &channels);
+
+ *size = width * channels / 8;
+
+ return ret;
+}
+
+static GstCaps *
+gst_audio_panorama_transform_caps (GstBaseTransform * base,
+ GstPadDirection direction, GstCaps * caps)
+{
+ GstCaps *res;
+ GstStructure *structure;
+
+ /* transform caps gives one single caps so we can just replace
+ * the channel property with our range. */
+ res = gst_caps_copy (caps);
+ structure = gst_caps_get_structure (res, 0);
+ if (direction == GST_PAD_SRC) {
+ GST_INFO ("allow 1-2 channels");
+ gst_structure_set (structure, "channels", GST_TYPE_INT_RANGE, 1, 2, NULL);
+ } else {
+ GST_INFO ("allow 2 channels");
+ gst_structure_set (structure, "channels", G_TYPE_INT, 2, NULL);
+ }
+
+ return res;
+}
+
+static gboolean
+gst_audio_panorama_set_caps (GstBaseTransform * base, GstCaps * incaps,
+ GstCaps * outcaps)
+{
+ GstAudioPanorama *filter = GST_AUDIO_PANORAMA (base);
+ const GstStructure *structure;
+ gboolean ret;
+ gint width;
+ const gchar *fmt;
+
+ /*GST_INFO ("incaps are %" GST_PTR_FORMAT, incaps); */
+
+ structure = gst_caps_get_structure (incaps, 0);
+ ret = gst_structure_get_int (structure, "channels", &filter->channels);
+ if (!ret)
+ goto no_channels;
+
+ ret = gst_structure_get_int (structure, "width", &width);
+ if (!ret)
+ goto no_width;
+ filter->width = width / 8;
+
+ fmt = gst_structure_get_name (structure);
+ if (!strcmp (fmt, "audio/x-raw-int"))
+ filter->format_float = FALSE;
+ else
+ filter->format_float = TRUE;
+
+ GST_DEBUG ("try to process %s input with %d channels", fmt, filter->channels);
+
+ ret = gst_audio_panorama_set_process_function (filter);
+
+ if (!ret)
+ GST_WARNING ("can't process input with %d channels", filter->channels);
+
+ return ret;
+
+no_channels:
+ GST_DEBUG ("no channels in caps");
+ return ret;
+no_width:
+ GST_DEBUG ("no width in caps");
+ return ret;
+}
+
+/* psychoacoustic processing functions */
+static void
+gst_audio_panorama_transform_m2s_int (GstAudioPanorama * filter, gint16 * idata,
+ gint16 * odata, guint num_samples)
+{
+ guint i;
+ gdouble val;
+ glong lval, rval;
+ gdouble rpan, lpan;
+
+ /* pan: -1.0 0.0 1.0
+ * lpan: 1.0 0.5 0.0
+ * rpan: 0.0 0.5 1.0
+ *
+ * FIXME: we should use -3db (1/sqtr(2)) for 50:50
+ */
+ rpan = (gdouble) (filter->panorama + 1.0) / 2.0;
+ lpan = 1.0 - rpan;
+
+ for (i = 0; i < num_samples; i++) {
+ val = (gdouble) * idata++;
+
+ lval = (glong) (val * lpan);
+ rval = (glong) (val * rpan);
+
+ *odata++ = (gint16) CLAMP (lval, G_MININT16, G_MAXINT16);
+ *odata++ = (gint16) CLAMP (rval, G_MININT16, G_MAXINT16);
+ }
+}
+
+static void
+gst_audio_panorama_transform_s2s_int (GstAudioPanorama * filter, gint16 * idata,
+ gint16 * odata, guint num_samples)
+{
+ guint i;
+ glong lval, rval;
+ gdouble lival, rival;
+ gdouble lrpan, llpan, rrpan, rlpan;
+
+ /* pan: -1.0 0.0 1.0
+ * llpan: 1.0 1.0 0.0
+ * lrpan: 1.0 0.0 0.0
+ * rrpan: 0.0 1.0 1.0
+ * rlpan: 0.0 0.0 1.0
+ */
+ if (filter->panorama > 0) {
+ rlpan = (gdouble) filter->panorama;
+ llpan = 1.0 - rlpan;
+ lrpan = 0.0;
+ rrpan = 1.0;
+ } else {
+ rrpan = (gdouble) (1.0 + filter->panorama);
+ lrpan = 1.0 - rrpan;
+ rlpan = 0.0;
+ llpan = 1.0;
+ }
+
+ for (i = 0; i < num_samples; i++) {
+ lival = (gdouble) * idata++;
+ rival = (gdouble) * idata++;
+
+ lval = lival * llpan + rival * lrpan;
+ rval = lival * rlpan + rival * rrpan;
+
+ *odata++ = (gint16) CLAMP (lval, G_MININT16, G_MAXINT16);
+ *odata++ = (gint16) CLAMP (rval, G_MININT16, G_MAXINT16);
+ }
+}
+
+static void
+gst_audio_panorama_transform_m2s_float (GstAudioPanorama * filter,
+ gfloat * idata, gfloat * odata, guint num_samples)
+{
+ guint i;
+ gfloat val;
+ gdouble rpan, lpan;
+
+ /* pan: -1.0 0.0 1.0
+ * lpan: 1.0 0.5 0.0
+ * rpan: 0.0 0.5 1.0
+ *
+ * FIXME: we should use -3db (1/sqtr(2)) for 50:50
+ */
+ rpan = (gdouble) (filter->panorama + 1.0) / 2.0;
+ lpan = 1.0 - rpan;
+
+ for (i = 0; i < num_samples; i++) {
+ val = *idata++;
+
+ *odata++ = val * lpan;
+ *odata++ = val * rpan;
+ }
+}
+
+static void
+gst_audio_panorama_transform_s2s_float (GstAudioPanorama * filter,
+ gfloat * idata, gfloat * odata, guint num_samples)
+{
+ guint i;
+ gfloat lival, rival;
+ gdouble lrpan, llpan, rrpan, rlpan;
+
+ /* pan: -1.0 0.0 1.0
+ * llpan: 1.0 1.0 0.0
+ * lrpan: 1.0 0.0 0.0
+ * rrpan: 0.0 1.0 1.0
+ * rlpan: 0.0 0.0 1.0
+ */
+ if (filter->panorama > 0) {
+ rlpan = (gdouble) filter->panorama;
+ llpan = 1.0 - rlpan;
+ lrpan = 0.0;
+ rrpan = 1.0;
+ } else {
+ rrpan = (gdouble) (1.0 + filter->panorama);
+ lrpan = 1.0 - rrpan;
+ rlpan = 0.0;
+ llpan = 1.0;
+ }
+
+ for (i = 0; i < num_samples; i++) {
+ lival = *idata++;
+ rival = *idata++;
+
+ *odata++ = lival * llpan + rival * lrpan;
+ *odata++ = lival * rlpan + rival * rrpan;
+ }
+}
+
+/* simple processing functions */
+static void
+gst_audio_panorama_transform_m2s_int_simple (GstAudioPanorama * filter,
+ gint16 * idata, gint16 * odata, guint num_samples)
+{
+ guint i;
+ gdouble val;
+ glong lval, rval;
+
+ for (i = 0; i < num_samples; i++) {
+ val = (gdouble) * idata++;
+
+ if (filter->panorama > 0.0) {
+ lval = (glong) (val * (1.0 - filter->panorama));
+ rval = (glong) val;
+ } else {
+ lval = (glong) val;
+ rval = (glong) (val * (1.0 + filter->panorama));
+ }
+
+ *odata++ = (gint16) CLAMP (lval, G_MININT16, G_MAXINT16);
+ *odata++ = (gint16) CLAMP (rval, G_MININT16, G_MAXINT16);
+ }
+}
+
+static void
+gst_audio_panorama_transform_s2s_int_simple (GstAudioPanorama * filter,
+ gint16 * idata, gint16 * odata, guint num_samples)
+{
+ guint i;
+ glong lval, rval;
+ gdouble lival, rival;
+
+ for (i = 0; i < num_samples; i++) {
+ lival = (gdouble) * idata++;
+ rival = (gdouble) * idata++;
+
+ if (filter->panorama > 0.0) {
+ lval = (glong) (lival * (1.0 - filter->panorama));
+ rval = (glong) rival;
+ } else {
+ lval = (glong) lival;
+ rval = (glong) (rival * (1.0 + filter->panorama));
+ }
+
+ *odata++ = (gint16) CLAMP (lval, G_MININT16, G_MAXINT16);
+ *odata++ = (gint16) CLAMP (rval, G_MININT16, G_MAXINT16);
+ }
+}
+
+static void
+gst_audio_panorama_transform_m2s_float_simple (GstAudioPanorama * filter,
+ gfloat * idata, gfloat * odata, guint num_samples)
+{
+ guint i;
+ gfloat val;
+
+
+ for (i = 0; i < num_samples; i++) {
+ val = *idata++;
+
+ if (filter->panorama > 0.0) {
+ *odata++ = val * (1.0 - filter->panorama);
+ *odata++ = val;
+ } else {
+ *odata++ = val;
+ *odata++ = val * (1.0 + filter->panorama);
+ }
+ }
+}
+
+static void
+gst_audio_panorama_transform_s2s_float_simple (GstAudioPanorama * filter,
+ gfloat * idata, gfloat * odata, guint num_samples)
+{
+ guint i;
+ gfloat lival, rival;
+
+ for (i = 0; i < num_samples; i++) {
+ lival = *idata++;
+ rival = *idata++;
+
+ if (filter->panorama > 0.0) {
+ *odata++ = lival * (1.0 - filter->panorama);
+ *odata++ = rival;
+ } else {
+ *odata++ = lival;
+ *odata++ = rival * (1.0 + filter->panorama);
+ }
+ }
+}
+
+/* this function does the actual processing
+ */
+static GstFlowReturn
+gst_audio_panorama_transform (GstBaseTransform * base, GstBuffer * inbuf,
+ GstBuffer * outbuf)
+{
+ GstAudioPanorama *filter = GST_AUDIO_PANORAMA (base);
+ guint num_samples = GST_BUFFER_SIZE (outbuf) / (2 * filter->width);
+
+ if (GST_CLOCK_TIME_IS_VALID (GST_BUFFER_TIMESTAMP (outbuf)))
+ gst_object_sync_values (G_OBJECT (filter), GST_BUFFER_TIMESTAMP (outbuf));
+
+ if (G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (inbuf, GST_BUFFER_FLAG_GAP))) {
+ GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_GAP);
+ memset (GST_BUFFER_DATA (outbuf), 0, GST_BUFFER_SIZE (outbuf));
+ return GST_FLOW_OK;
+ }
+
+ filter->process (filter, GST_BUFFER_DATA (inbuf),
+ GST_BUFFER_DATA (outbuf), num_samples);
+
+ return GST_FLOW_OK;
+}