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gstreamer/gst/audiofx/audiopanorama.c

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/*
* 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);
/* 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_simple (element_class, "Stereo positioning",
"Filter/Effect/Audio",
"Positions audio streams in the stereo panorama",
"Stefan Kost <ensonic@users.sf.net>");
}
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 pan;
glong lval, rval;
if (filter->panorama > 0.0) {
pan = 1.0 - filter->panorama;
for (i = 0; i < num_samples; i++) {
rval = *idata++;
lval = (glong) ((gdouble) rval * pan);
*odata++ = (gint16) CLAMP (lval, G_MININT16, G_MAXINT16);
*odata++ = (gint16) rval;
}
} else {
pan = 1.0 + filter->panorama;
for (i = 0; i < num_samples; i++) {
lval = *idata++;
rval = (glong) ((gdouble) lval * pan);
*odata++ = (gint16) lval;
*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, pan;
if (filter->panorama > 0.0) {
pan = 1.0 - filter->panorama;
for (i = 0; i < num_samples; i++) {
lival = (gdouble) * idata++;
rival = (gdouble) * idata++;
lval = (glong) (lival * pan);
rval = (glong) rival;
*odata++ = (gint16) CLAMP (lval, G_MININT16, G_MAXINT16);
*odata++ = (gint16) rval;
}
} else {
pan = 1.0 + filter->panorama;
for (i = 0; i < num_samples; i++) {
lival = (gdouble) * idata++;
rival = (gdouble) * idata++;
lval = (glong) lival;
rval = (glong) (rival * pan);
*odata++ = (gint16) lval;
*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, pan;
if (filter->panorama > 0.0) {
pan = 1.0 - filter->panorama;
for (i = 0; i < num_samples; i++) {
val = *idata++;
*odata++ = val * pan;
*odata++ = val;
}
} else {
pan = 1.0 + filter->panorama;
for (i = 0; i < num_samples; i++) {
val = *idata++;
*odata++ = val;
*odata++ = val * pan;
}
}
}
static void
gst_audio_panorama_transform_s2s_float_simple (GstAudioPanorama * filter,
gfloat * idata, gfloat * odata, guint num_samples)
{
guint i;
gfloat lival, rival, pan;
if (filter->panorama > 0.0) {
pan = 1.0 - filter->panorama;
for (i = 0; i < num_samples; i++) {
lival = *idata++;
rival = *idata++;
*odata++ = lival * pan;
*odata++ = rival;
}
} else {
pan = 1.0 + filter->panorama;
for (i = 0; i < num_samples; i++) {
lival = *idata++;
rival = *idata++;
*odata++ = lival;
*odata++ = rival * pan;
}
}
}
/* 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);
GstClockTime timestamp, stream_time;
timestamp = GST_BUFFER_TIMESTAMP (inbuf);
stream_time =
gst_segment_to_stream_time (&base->segment, GST_FORMAT_TIME, timestamp);
GST_DEBUG_OBJECT (filter, "sync to %" GST_TIME_FORMAT,
GST_TIME_ARGS (timestamp));
if (GST_CLOCK_TIME_IS_VALID (stream_time))
gst_object_sync_values (G_OBJECT (filter), stream_time);
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;
}
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