--- /dev/null
+/* Gnome-Streamer
+ * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+ *
+ * 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.
+ */
+
+
+#include <string.h>
+#include <math.h>
+
+//#define DEBUG_ENABLED
+#include <gstaudioscale.h>
+#include <libs/audio/gstaudio.h>
+#include <libs/resample/resample.h>
+
+/* elementfactory information */
+static GstElementDetails audioscale_details = {
+ "Audio scaler",
+ "Filter/Audio/Scaler",
+ "Resizes audio",
+ VERSION,
+ "Wim Taymans <wim.taymans@chello.be>",
+ "(C) 2000",
+};
+
+/* Audioscale signals and args */
+enum {
+ /* FILL ME */
+ LAST_SIGNAL
+};
+
+enum {
+ ARG_0,
+ ARG_FREQUENCY,
+ ARG_FILTERLEN,
+ ARG_METHOD,
+ /* FILL ME */
+};
+
+static GstPadTemplate *
+sink_template (void)
+{
+ static GstPadTemplate *template = NULL;
+
+ if (!template) {
+ template = gst_padtemplate_new ("sink",
+ GST_PAD_SINK,
+ GST_PAD_ALWAYS,
+ gst_caps_new
+ ("audioscale_sink",
+ "audio/raw", GST_AUDIO_INT_PAD_TEMPLATE_PROPS), NULL);
+ }
+ return template;
+}
+
+static GstPadTemplate *
+src_template (void)
+{
+ static GstPadTemplate *template = NULL;
+
+ if (!template) {
+ template = gst_padtemplate_new ("src",
+ GST_PAD_SRC,
+ GST_PAD_ALWAYS,
+ gst_caps_new
+ ("audioscale_src",
+ "audio/raw", GST_AUDIO_INT_PAD_TEMPLATE_PROPS), NULL);
+ }
+ return template;
+}
+
+#define GST_TYPE_AUDIOSCALE_METHOD (gst_audioscale_method_get_type())
+static GType
+gst_audioscale_method_get_type (void)
+{
+ static GType audioscale_method_type = 0;
+ static GEnumValue audioscale_methods[] = {
+ { GST_AUDIOSCALE_NEAREST, "0", "Nearest" },
+ { GST_AUDIOSCALE_BILINEAR, "1", "Bilinear" },
+ { GST_AUDIOSCALE_SINC, "2", "Sinc" },
+ { 0, NULL, NULL },
+ };
+ if(!audioscale_method_type){
+ audioscale_method_type = g_enum_register_static("GstAudioscaleMethod",
+ audioscale_methods);
+ }
+ return audioscale_method_type;
+}
+
+static void gst_audioscale_class_init (AudioscaleClass *klass);
+static void gst_audioscale_init (Audioscale *audioscale);
+
+static void gst_audioscale_chain (GstPad *pad, GstBuffer *buf);
+
+static void gst_audioscale_set_property (GObject * object, guint prop_id,
+ const GValue * value, GParamSpec * pspec);
+static void gst_audioscale_get_property (GObject * object, guint prop_id,
+ GValue * value, GParamSpec * pspec);
+
+static GstElementClass *parent_class = NULL;
+
+//static guint gst_audioscale_signals[LAST_SIGNAL] = { 0 };
+
+GType
+audioscale_get_type (void)
+{
+ static GType audioscale_type = 0;
+
+ if (!audioscale_type) {
+ static const GTypeInfo audioscale_info = {
+ sizeof(AudioscaleClass), NULL,
+ NULL,
+ (GClassInitFunc)gst_audioscale_class_init,
+ NULL,
+ NULL,
+ sizeof(Audioscale),
+ 0,
+ (GInstanceInitFunc)gst_audioscale_init,
+ };
+ audioscale_type = g_type_register_static(GST_TYPE_ELEMENT, "Audioscale", &audioscale_info, 0);
+ }
+ return audioscale_type;
+}
+
+static void
+gst_audioscale_class_init (AudioscaleClass *klass)
+{
+ GObjectClass *gobject_class;
+ GstElementClass *gstelement_class;
+
+ gobject_class = (GObjectClass*)klass;
+ gstelement_class = (GstElementClass*)klass;
+
+ g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_FREQUENCY,
+ g_param_spec_int("frequency","frequency","frequency",
+ G_MININT,G_MAXINT,0,G_PARAM_READWRITE)); // CHECKME
+ g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_FILTERLEN,
+ g_param_spec_int ("filter_length", "filter_length", "filter_length",
+ G_MININT, G_MAXINT, 0, G_PARAM_READWRITE)); // CHECKME
+ g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_METHOD,
+ g_param_spec_int ("method", "method", "method",
+ G_MININT, G_MAXINT, 0, G_PARAM_READWRITE)); // CHECKME
+
+ parent_class = g_type_class_ref(GST_TYPE_ELEMENT);
+
+ gobject_class->set_property = gst_audioscale_set_property;
+ gobject_class->get_property = gst_audioscale_get_property;
+
+}
+
+static GstPadNegotiateReturn
+audioscale_negotiate_src (GstPad * pad, GstCaps ** caps, gpointer * data)
+{
+ Audioscale *audioscale = GST_AUDIOSCALE (gst_pad_get_parent (pad));
+
+ g_print ("audioscale_negotiate_src\n");
+
+ if (*caps == NULL)
+ return GST_PAD_NEGOTIATE_FAIL;
+
+ *caps = gst_caps_copy_on_write (*caps);
+ gst_caps_set (*caps, "rate", GST_PROPS_INT_RANGE (8000, 48000));
+
+ return gst_pad_negotiate_proxy (pad, audioscale->sinkpad, caps);
+}
+
+static GstPadNegotiateReturn
+audioscale_negotiate_sink (GstPad * pad, GstCaps ** caps, gpointer * data)
+{
+ Audioscale *audioscale = GST_AUDIOSCALE (gst_pad_get_parent (pad));
+
+ g_print ("audioscale_negotiate_sink\n");
+
+ if (*caps == NULL)
+ return GST_PAD_NEGOTIATE_FAIL;
+
+ *caps = gst_caps_copy_on_write (*caps);
+ gst_caps_set (*caps, "rate", GST_PROPS_INT (audioscale->targetfrequency));
+
+ return gst_pad_negotiate_proxy (pad, audioscale->srcpad, caps);
+}
+
+static void
+gst_audioscale_newcaps (GstPad * pad, GstCaps * caps)
+{
+ Audioscale *audioscale;
+ resample_t *r;
+
+ audioscale = GST_AUDIOSCALE (gst_pad_get_parent (pad));
+ r = audioscale->resample;
+
+ r->i_rate = gst_caps_get_int (caps, "rate");
+ r->channels = gst_caps_get_int (caps, "channels");
+
+ resample_reinit(r);
+ //g_print("audioscale: unsupported scaling method %d\n", audioscale->method);
+
+}
+
+static void *
+gst_audioscale_get_buffer (void *priv, unsigned int size)
+{
+ Audioscale * audioscale = priv;
+
+ audioscale->outbuf = gst_buffer_new();
+ GST_BUFFER_SIZE(audioscale->outbuf) = size;
+ GST_BUFFER_DATA(audioscale->outbuf) = g_malloc(size);
+
+ return GST_BUFFER_DATA(audioscale->outbuf);
+}
+
+static void
+gst_audioscale_init (Audioscale *audioscale)
+{
+ resample_t *r;
+
+ audioscale->sinkpad = gst_pad_new_from_template (GST_PADTEMPLATE_GET (sink_template), "sink");
+ gst_pad_set_negotiate_function (audioscale->sinkpad, audioscale_negotiate_sink);
+ gst_element_add_pad(GST_ELEMENT(audioscale),audioscale->sinkpad);
+ gst_pad_set_chain_function(audioscale->sinkpad,gst_audioscale_chain);
+ gst_pad_set_newcaps_function (audioscale->sinkpad, gst_audioscale_newcaps);
+
+ audioscale->srcpad = gst_pad_new_from_template (GST_PADTEMPLATE_GET (src_template), "src");
+ gst_pad_set_negotiate_function (audioscale->srcpad, audioscale_negotiate_src);
+
+ gst_element_add_pad(GST_ELEMENT(audioscale),audioscale->srcpad);
+
+ r = g_new0(resample_t,1);
+ audioscale->resample = r;
+
+ r->priv = audioscale;
+ r->get_buffer = gst_audioscale_get_buffer;
+ r->method = RESAMPLE_SINC;
+ r->channels = 0;
+ r->filter_length = 16;
+ r->i_rate = -1;
+ r->o_rate = -1;
+ //r->verbose = 1;
+
+ resample_init(r);
+}
+
+static void
+gst_audioscale_chain (GstPad *pad, GstBuffer *buf)
+{
+ Audioscale *audioscale;
+ guchar *data;
+ gulong size;
+
+ g_return_if_fail(pad != NULL);
+ g_return_if_fail(GST_IS_PAD(pad));
+ g_return_if_fail(buf != NULL);
+
+ audioscale = GST_AUDIOSCALE (gst_pad_get_parent (pad));
+ data = GST_BUFFER_DATA(buf);
+ size = GST_BUFFER_SIZE(buf);
+
+ GST_DEBUG (0,
+ "gst_audioscale_chain: got buffer of %ld bytes in '%s'\n",
+ size, gst_element_get_name (GST_ELEMENT (audioscale)));
+
+
+ resample_scale (audioscale->resample, data, size);
+
+ gst_pad_push (audioscale->srcpad, audioscale->outbuf);
+
+ gst_buffer_unref (buf);
+}
+
+static void
+gst_audioscale_set_property (GObject * object, guint prop_id,
+ const GValue * value, GParamSpec * pspec)
+{
+ Audioscale *src;
+ resample_t *r;
+
+ /* it's not null if we got it, but it might not be ours */
+ g_return_if_fail(GST_IS_AUDIOSCALE(object));
+ src = GST_AUDIOSCALE(object);
+ r = src->resample;
+
+ switch (prop_id) {
+ case ARG_FREQUENCY:
+ src->targetfrequency = g_value_get_int (value);
+ r->o_rate = src->targetfrequency;
+ break;
+ case ARG_FILTERLEN:
+ r->filter_length = g_value_get_int (value);
+ g_print ("new filter length %d\n", r->filter_length);
+ break;
+ case ARG_METHOD:
+ r->method = g_value_get_int (value);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+gst_audioscale_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
+{
+ Audioscale *src;
+ resample_t *r;
+
+ /* it's not null if we got it, but it might not be ours */
+ g_return_if_fail(GST_IS_AUDIOSCALE(object));
+ src = GST_AUDIOSCALE(object);
+ r = src->resample;
+
+ switch (prop_id) {
+ case ARG_FREQUENCY:
+ g_value_set_int (value, src->targetfrequency);
+ break;
+ case ARG_FILTERLEN:
+ g_value_set_int (value, r->filter_length);
+ break;
+ case ARG_METHOD:
+ g_value_set_int (value, r->method);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+
+static gboolean
+plugin_init (GModule *module, GstPlugin *plugin)
+{
+ GstElementFactory *factory;
+
+ /* create an elementfactory for the audioscale element */
+ factory = gst_elementfactory_new ("audioscale", GST_TYPE_AUDIOSCALE, &audioscale_details);
+ g_return_val_if_fail(factory != NULL, FALSE);
+ gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
+
+ return TRUE;
+}
+
+GstPluginDesc plugin_desc = {
+ GST_VERSION_MAJOR,
+ GST_VERSION_MINOR,
+ "audioscale",
+ plugin_init
+};
--- /dev/null
+/* Gnome-Streamer
+ * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+ *
+ * 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.
+ */
+
+
+#ifndef __AUDIOSCALE_H__
+#define __AUDIOSCALE_H__
+
+
+#include <config.h>
+#include <gst/gst.h>
+
+#include <libs/resample/resample.h>
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+
+#define GST_TYPE_AUDIOSCALE \
+ (audioscale_get_type())
+#define GST_AUDIOSCALE(obj) \
+ (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_AUDIOSCALE,Audioscale))
+#define GST_AUDIOSCALE_CLASS(klass) \
+ (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_AUDIOSCALE,Audioscale))
+#define GST_IS_AUDIOSCALE(obj) \
+ (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_AUDIOSCALE))
+#define GST_IS_AUDIOSCALE_CLASS(obj) \
+ (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_AUDIOSCALE))
+
+typedef enum {
+ GST_AUDIOSCALE_NEAREST,
+ GST_AUDIOSCALE_BILINEAR,
+ GST_AUDIOSCALE_SINC,
+} GstAudioScaleMethod;
+
+typedef struct _Audioscale Audioscale;
+typedef struct _AudioscaleClass AudioscaleClass;
+
+struct _Audioscale {
+ GstElement element;
+
+ GstPad *sinkpad,*srcpad;
+
+ // audio state
+ gint format;
+ gint channels;
+ gint frequency;
+ gint targetfrequency;
+
+ resample_t *resample;
+
+ GstBuffer *outbuf;
+};
+
+struct _AudioscaleClass {
+ GstElementClass parent_class;
+};
+
+GType gst_audioscale_get_type(void);
+
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+
+#endif /* __AUDIOSCALE_H__ */
projects / platform / upstream / gst-plugins-base.git / commitdiff