+++ /dev/null
-/*
- * GStreamer
- * Copyright (C) 2006 Stefan Kost <ensonic@users.sf.net>
- *
- * 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:gstaudiopanorama
- * @short_description: audio strereo pan effect
- *
- * <refsect2>
- * Stereo panorama effect with controllable pan position.
- * <title>Example launch line</title>
- * <para>
- * <programlisting>
- * gst-launch audiotestsrc wave=saw ! audiopanorama panorama=-100 ! alsasink
- * gst-launch filesrc location="melo1.ogg" ! oggdemux ! vorbisdec ! audioconvert ! audiopanorama panorama=-100 ! alsasink
- * gst-launch audiotestsrc wave=saw ! audioconvert ! audiopanorama panorama=-100 ! audioconvert ! alsasink
- * </programlisting>
- * </para>
- * </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 ("AudioPanorama",
- "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
-};
-
-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 GstFlowReturn gst_audio_panorama_transform (GstBaseTransform * base,
- GstBuffer * inbuf, GstBuffer * outbuf);
-
-/* 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));
-
- 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;
-}
-
-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;
- 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;
- 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 channels;
- 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", &channels);
- if (!ret)
- goto no_channels;
-
- fmt = gst_structure_get_name (structure);
-
- GST_DEBUG ("try to process %s input with %d channels", fmt, channels);
-
- /* set processing function */
- switch (channels) {
- case 1:
- if (!strcmp (fmt, "audio/x-raw-int"))
- filter->process = (GstAudioPanoramaProcessFunc)
- gst_audio_panorama_transform_m2s_int;
- else
- filter->process = (GstAudioPanoramaProcessFunc)
- gst_audio_panorama_transform_m2s_float;
- ret = TRUE;
- break;
- case 2:
- if (!strcmp (fmt, "audio/x-raw-int"))
- filter->process = (GstAudioPanoramaProcessFunc)
- gst_audio_panorama_transform_s2s_int;
- else
- filter->process = (GstAudioPanoramaProcessFunc)
- gst_audio_panorama_transform_s2s_float;
- ret = TRUE;
- break;
- default:
- filter->process = NULL;
- ret = FALSE;
- GST_WARNING ("can't process input with %d channels", channels);
- }
- return ret;
-
-no_channels:
- GST_DEBUG ("no channels in caps");
- return ret;
-}
-
-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;
- }
-}
-
-/* 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 * sizeof (gint16));
-
- if (!gst_buffer_is_writable (outbuf))
- return GST_FLOW_OK;
-
- if (GST_CLOCK_TIME_IS_VALID (GST_BUFFER_TIMESTAMP (outbuf)))
- gst_object_sync_values (G_OBJECT (filter), GST_BUFFER_TIMESTAMP (outbuf));
-
- filter->process (filter, GST_BUFFER_DATA (inbuf),
- GST_BUFFER_DATA (outbuf), num_samples);
-
- return GST_FLOW_OK;
-}
projects / platform / upstream / gst-plugins-good.git / commitdiff