--- /dev/null
+/*
+ * GStreamer
+ * Copyright (C) 2007 Sebastian Dröge <slomo@circular-chaos.org>
+ * 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:element-audioamplify
+ * @short_description: Amplifies an audio stream with selectable clipping mode
+ *
+ * <refsect2>
+ * Amplifies an audio stream by a given factor and allows the selection of different clipping modes.
+ * The difference between the clipping modes is best evaluated by testing.
+ * <title>Example launch line</title>
+ * <para>
+ * <programlisting>
+ * gst-launch audiotestsrc wave=saw ! audioamplify amplification=1.5 ! alsasink
+ * gst-launch filesrc location="melo1.ogg" ! oggdemux ! vorbisdec ! audioconvert ! audioamplify amplification=1.5 method=wrap-negative ! alsasink
+ * gst-launch audiotestsrc wave=saw ! audioconvert ! audioamplify amplification=1.5 method=wrap-positive ! 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 "audioamplify.h"
+
+#define GST_CAT_DEFAULT gst_audio_amplify_debug
+GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
+
+static const GstElementDetails element_details =
+GST_ELEMENT_DETAILS ("AudioAmplify",
+ "Filter/Effect/Audio",
+ "Amplifies an audio stream by a given factor",
+ "Sebastian Dröge <slomo@circular-chaos.org>");
+
+/* Filter signals and args */
+enum
+{
+ /* FILL ME */
+ LAST_SIGNAL
+};
+
+enum
+{
+ PROP_0,
+ PROP_AMPLIFICATION,
+ PROP_CLIPPING_METHOD
+};
+
+enum
+{
+ METHOD_CLIP = 0,
+ METHOD_WRAP_NEGATIVE,
+ METHOD_WRAP_POSITIVE,
+ NUM_METHODS
+};
+
+#define GST_TYPE_AUDIO_AMPLIFY_CLIPPING_METHOD (gst_audio_amplify_clipping_method_get_type ())
+static GType
+gst_audio_amplify_clipping_method_get_type (void)
+{
+ static GType gtype = 0;
+
+ if (gtype == 0) {
+ static const GEnumValue values[] = {
+ {METHOD_CLIP, "Normal Clipping (default)", "clip"},
+ {METHOD_WRAP_NEGATIVE,
+ "Push overdriven values back from the opposite side",
+ "wrap-negative"},
+ {METHOD_WRAP_POSITIVE, "Push overdriven values back from the same side",
+ "wrap-positive"},
+ {0, NULL, NULL}
+ };
+
+ gtype = g_enum_register_static ("GstAudioPanoramaClippingMethod", 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, MAX ], "
+ "endianness = (int) BYTE_ORDER, " "width = (int) 32; "
+ "audio/x-raw-int, "
+ "rate = (int) [ 1, MAX ], "
+ "channels = (int) [ 1, MAX ], "
+ "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) [ 1, MAX], "
+ "endianness = (int) BYTE_ORDER, " "width = (int) 32; "
+ "audio/x-raw-int, "
+ "rate = (int) [ 1, MAX ], "
+ "channels = (int) [ 1, MAX ], "
+ "endianness = (int) BYTE_ORDER, "
+ "width = (int) 16, " "depth = (int) 16, " "signed = (boolean) true")
+ );
+
+#define DEBUG_INIT(bla) \
+ GST_DEBUG_CATEGORY_INIT (gst_audio_amplify_debug, "audioamplify", 0, "audioamplify element");
+
+GST_BOILERPLATE_FULL (GstAudioAmplify, gst_audio_amplify, GstBaseTransform,
+ GST_TYPE_BASE_TRANSFORM, DEBUG_INIT);
+
+static void gst_audio_amplify_set_property (GObject * object, guint prop_id,
+ const GValue * value, GParamSpec * pspec);
+static void gst_audio_amplify_get_property (GObject * object, guint prop_id,
+ GValue * value, GParamSpec * pspec);
+
+static gboolean gst_audio_amplify_set_caps (GstBaseTransform * base,
+ GstCaps * incaps, GstCaps * outcaps);
+static GstFlowReturn gst_audio_amplify_transform_ip (GstBaseTransform * base,
+ GstBuffer * buf);
+
+static void gst_audio_amplify_transform_int_clip (GstAudioAmplify * filter,
+ gint16 * data, guint num_samples);
+static void gst_audio_amplify_transform_int_wrap_negative (GstAudioAmplify *
+ filter, gint16 * data, guint num_samples);
+static void gst_audio_amplify_transform_int_wrap_positive (GstAudioAmplify *
+ filter, gint16 * data, guint num_samples);
+static void gst_audio_amplify_transform_float_clip (GstAudioAmplify * filter,
+ gfloat * data, guint num_samples);
+static void gst_audio_amplify_transform_float_wrap_negative (GstAudioAmplify *
+ filter, gfloat * data, guint num_samples);
+static void gst_audio_amplify_transform_float_wrap_positive (GstAudioAmplify *
+ filter, gfloat * data, guint num_samples);
+
+/* table of processing functions: [format][clipping_method] */
+static GstAudioAmplifyProcessFunc processing_functions[2][3] = {
+ {
+ (GstAudioAmplifyProcessFunc) gst_audio_amplify_transform_int_clip,
+ (GstAudioAmplifyProcessFunc)
+ gst_audio_amplify_transform_int_wrap_negative,
+ (GstAudioAmplifyProcessFunc)
+ gst_audio_amplify_transform_int_wrap_positive},
+ {
+ (GstAudioAmplifyProcessFunc) gst_audio_amplify_transform_float_clip,
+ (GstAudioAmplifyProcessFunc)
+ gst_audio_amplify_transform_float_wrap_negative,
+ (GstAudioAmplifyProcessFunc)
+ gst_audio_amplify_transform_float_wrap_positive}
+};
+
+/* GObject vmethod implementations */
+
+static void
+gst_audio_amplify_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_amplify_class_init (GstAudioAmplifyClass * klass)
+{
+ GObjectClass *gobject_class;
+
+ gobject_class = (GObjectClass *) klass;
+ gobject_class->set_property = gst_audio_amplify_set_property;
+ gobject_class->get_property = gst_audio_amplify_get_property;
+
+ g_object_class_install_property (gobject_class, PROP_AMPLIFICATION,
+ g_param_spec_float ("amplification", "Amplification",
+ "Factor of amplification", 0.0, G_MAXFLOAT,
+ 1.0, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE));
+
+ /**
+ * GstAudioAmplify:clipping-method
+ *
+ * Clipping method: clip mode set values higher than the maximum to the
+ * maximum. The wrap-negative mode pushes those values back from the
+ * opposite side, wrap-positive pushes them back from the same side.
+ *
+ **/
+ g_object_class_install_property (gobject_class, PROP_CLIPPING_METHOD,
+ g_param_spec_enum ("clipping-method", "Clipping method",
+ "Selects how to handle values higher than the maximum",
+ GST_TYPE_AUDIO_AMPLIFY_CLIPPING_METHOD, METHOD_CLIP,
+ G_PARAM_READWRITE));
+
+ GST_BASE_TRANSFORM_CLASS (klass)->set_caps =
+ GST_DEBUG_FUNCPTR (gst_audio_amplify_set_caps);
+ GST_BASE_TRANSFORM_CLASS (klass)->transform_ip =
+ GST_DEBUG_FUNCPTR (gst_audio_amplify_transform_ip);
+}
+
+static void
+gst_audio_amplify_init (GstAudioAmplify * filter, GstAudioAmplifyClass * klass)
+{
+ filter->amplification = 1.0;
+ filter->clipping_method = METHOD_CLIP;
+ filter->width = 0;
+ filter->format_float = FALSE;
+ gst_base_transform_set_in_place (GST_BASE_TRANSFORM (filter), TRUE);
+}
+
+static gboolean
+gst_audio_amplify_set_process_function (GstAudioAmplify * filter)
+{
+ gint format_index, method_index;
+
+ /* set processing function */
+
+ format_index = (filter->format_float) ? 1 : 0;
+
+ method_index = filter->clipping_method;
+ if (method_index >= NUM_METHODS || method_index < 0)
+ method_index = METHOD_CLIP;
+
+ filter->process = processing_functions[format_index][method_index];
+ return TRUE;
+}
+
+static void
+gst_audio_amplify_set_property (GObject * object, guint prop_id,
+ const GValue * value, GParamSpec * pspec)
+{
+ GstAudioAmplify *filter = GST_AUDIO_AMPLIFY (object);
+
+ switch (prop_id) {
+ case PROP_AMPLIFICATION:
+ filter->amplification = g_value_get_float (value);
+ gst_base_transform_set_passthrough (GST_BASE_TRANSFORM (filter),
+ filter->amplification == 1.0);
+ break;
+ case PROP_CLIPPING_METHOD:
+ filter->clipping_method = g_value_get_enum (value);
+ gst_audio_amplify_set_process_function (filter);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+gst_audio_amplify_get_property (GObject * object, guint prop_id,
+ GValue * value, GParamSpec * pspec)
+{
+ GstAudioAmplify *filter = GST_AUDIO_AMPLIFY (object);
+
+ switch (prop_id) {
+ case PROP_AMPLIFICATION:
+ g_value_set_float (value, filter->amplification);
+ break;
+ case PROP_CLIPPING_METHOD:
+ g_value_set_enum (value, filter->clipping_method);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+/* GstBaseTransform vmethod implementations */
+
+static gboolean
+gst_audio_amplify_set_caps (GstBaseTransform * base, GstCaps * incaps,
+ GstCaps * outcaps)
+{
+ GstAudioAmplify *filter = GST_AUDIO_AMPLIFY (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, "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", fmt);
+ ret = gst_audio_amplify_set_process_function (filter);
+ if (!ret)
+ GST_WARNING ("can't process input");
+
+ return TRUE;
+
+no_width:
+ GST_DEBUG ("no width in caps");
+ return FALSE;
+}
+
+static void
+gst_audio_amplify_transform_int_clip (GstAudioAmplify * filter,
+ gint16 * data, guint num_samples)
+{
+ gint i;
+ glong val;
+
+ for (i = 0; i < num_samples; i++) {
+ val = (*data) * filter->amplification;
+ *data++ = (gint16) CLAMP (val, G_MININT16, G_MAXINT16);
+ }
+}
+
+static void
+gst_audio_amplify_transform_int_wrap_negative (GstAudioAmplify * filter,
+ gint16 * data, guint num_samples)
+{
+ gint i;
+ glong val;
+
+ for (i = 0; i < num_samples; i++) {
+ val = (*data) * filter->amplification;
+ if (val > G_MAXINT16)
+ val = ((val - G_MININT16) & 0xffff) + G_MININT16;
+ else if (val < G_MININT16)
+ val = ((val - G_MAXINT16) & 0xffff) + G_MAXINT16;
+ *data++ = val;
+ }
+}
+
+static void
+gst_audio_amplify_transform_int_wrap_positive (GstAudioAmplify * filter,
+ gint16 * data, guint num_samples)
+{
+ gint i;
+ glong val;
+
+ for (i = 0; i < num_samples; i++) {
+ val = (*data) * filter->amplification;
+ while (val > G_MAXINT16 || val < G_MININT16) {
+ if (val > G_MAXINT16)
+ val = G_MAXINT16 - (val - G_MAXINT16);
+ else if (val < G_MININT16)
+ val = G_MININT16 - (val - G_MININT16);
+ }
+ *data++ = val;
+ }
+}
+
+static void
+gst_audio_amplify_transform_float_clip (GstAudioAmplify * filter,
+ gfloat * data, guint num_samples)
+{
+ gint i;
+ gfloat val;
+
+ for (i = 0; i < num_samples; i++) {
+ val = (*data) * filter->amplification;
+ if (val > 1.0)
+ val = 1.0;
+ else if (val < -1.0)
+ val = -1.0;
+
+ *data++ = val;
+ }
+}
+
+static void
+gst_audio_amplify_transform_float_wrap_negative (GstAudioAmplify * filter,
+ gfloat * data, guint num_samples)
+{
+ gint i;
+ gfloat val;
+
+ for (i = 0; i < num_samples; i++) {
+ val = (*data) * filter->amplification;
+ while (val > 1.0 || val < -1.0) {
+ if (val > 1.0)
+ val = -1.0 + (val - 1.0);
+ else if (val < -1.0)
+ val = 1.0 + (val + 1.0);
+ }
+ *data++ = val;
+ }
+}
+
+static void
+gst_audio_amplify_transform_float_wrap_positive (GstAudioAmplify * filter,
+ gfloat * data, guint num_samples)
+{
+ gint i;
+ gfloat val;
+
+ for (i = 0; i < num_samples; i++) {
+ val = (*data) * filter->amplification;
+ while (val > 1.0 || val < -1.0) {
+ if (val > 1.0)
+ val = 1.0 - (val - 1.0);
+ else if (val < -1.0)
+ val = -1.0 - (val + 1.0);
+ }
+ *data++ = val;
+ }
+}
+
+/* this function does the actual processing
+ */
+static GstFlowReturn
+gst_audio_amplify_transform_ip (GstBaseTransform * base, GstBuffer * buf)
+{
+ GstAudioAmplify *filter = GST_AUDIO_AMPLIFY (base);
+ guint num_samples = GST_BUFFER_SIZE (buf) / filter->width;
+
+ if (!gst_buffer_is_writable (buf))
+ return GST_FLOW_OK;
+
+ filter->process (filter, GST_BUFFER_DATA (buf), num_samples);
+
+ return GST_FLOW_OK;
+}
--- /dev/null
+/* GStreamer
+ *
+ * unit test for audioamplify
+ *
+ * Copyright (C) 2007 Sebastian Dröge <slomo@circular-chaos.org>
+ *
+ * Greatly based on the audiopanorama unit test
+ * 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.
+ */
+
+#include <unistd.h>
+
+#include <gst/base/gstbasetransform.h>
+#include <gst/check/gstcheck.h>
+
+gboolean have_eos = FALSE;
+
+/* For ease of programming we use globals to keep refs for our floating
+ * src and sink pads we create; otherwise we always have to do get_pad,
+ * get_peer, and then remove references in every test function */
+GstPad *mysrcpad, *mysinkpad;
+
+
+#define AMPLIFY_CAPS_STRING \
+ "audio/x-raw-int, " \
+ "channels = (int) 1, " \
+ "rate = (int) 44100, " \
+ "endianness = (int) BYTE_ORDER, " \
+ "width = (int) 16, " \
+ "depth = (int) 16, " \
+ "signed = (bool) TRUE"
+
+static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink",
+ GST_PAD_SINK,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS ("audio/x-raw-int, "
+ "channels = (int) 1, "
+ "rate = (int) [ 1, MAX ], "
+ "endianness = (int) BYTE_ORDER, "
+ "width = (int) 16, " "depth = (int) 16, " "signed = (bool) TRUE")
+ );
+static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src",
+ GST_PAD_SRC,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS ("audio/x-raw-int, "
+ "channels = (int) 1, "
+ "rate = (int) [ 1, MAX ], "
+ "endianness = (int) BYTE_ORDER, "
+ "width = (int) 16, " "depth = (int) 16, " "signed = (bool) TRUE")
+ );
+
+GstElement *
+setup_amplify ()
+{
+ GstElement *amplify;
+
+ GST_DEBUG ("setup_amplify");
+ amplify = gst_check_setup_element ("audioamplify");
+ mysrcpad = gst_check_setup_src_pad (amplify, &srctemplate, NULL);
+ mysinkpad = gst_check_setup_sink_pad (amplify, &sinktemplate, NULL);
+ gst_pad_set_active (mysrcpad, TRUE);
+ gst_pad_set_active (mysinkpad, TRUE);
+
+ return amplify;
+}
+
+void
+cleanup_amplify (GstElement * amplify)
+{
+ GST_DEBUG ("cleanup_amplify");
+
+ g_list_foreach (buffers, (GFunc) gst_mini_object_unref, NULL);
+ g_list_free (buffers);
+ buffers = NULL;
+
+ gst_pad_set_active (mysrcpad, FALSE);
+ gst_pad_set_active (mysinkpad, FALSE);
+ gst_check_teardown_src_pad (amplify);
+ gst_check_teardown_sink_pad (amplify);
+ gst_check_teardown_element (amplify);
+}
+
+GST_START_TEST (test_passthrough)
+{
+ GstElement *amplify;
+ GstBuffer *inbuffer, *outbuffer;
+ GstCaps *caps;
+ gint16 in[6] = { 24576, -16384, 256, -128, 0, -24576 };
+ gint16 *res;
+
+ amplify = setup_amplify ();
+ fail_unless (gst_element_set_state (amplify,
+ GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS,
+ "could not set to playing");
+
+ inbuffer = gst_buffer_new_and_alloc (12);
+ memcpy (GST_BUFFER_DATA (inbuffer), in, 12);
+ fail_unless (memcmp (GST_BUFFER_DATA (inbuffer), in, 12) == 0);
+ caps = gst_caps_from_string (AMPLIFY_CAPS_STRING);
+ gst_buffer_set_caps (inbuffer, caps);
+ gst_caps_unref (caps);
+ ASSERT_BUFFER_REFCOUNT (inbuffer, "inbuffer", 1);
+
+ /* pushing gives away my reference ... */
+ fail_unless (gst_pad_push (mysrcpad, inbuffer) == GST_FLOW_OK);
+ /* ... but it ends up being collected on the global buffer list */
+ fail_unless_equals_int (g_list_length (buffers), 1);
+ fail_if ((outbuffer = (GstBuffer *) buffers->data) == NULL);
+
+ res = (gint16 *) GST_BUFFER_DATA (outbuffer);
+ GST_INFO
+ ("expected %+5ld %+5ld %+5ld %+5ld %+5ld %+5ld real %+5ld %+5ld %+5ld %+5ld %+5ld %+5ld",
+ in[0], in[1], in[2], in[3], in[4], in[5], res[0], res[1], res[2], res[3],
+ res[4], res[5]);
+ fail_unless (memcmp (GST_BUFFER_DATA (outbuffer), in, 12) == 0);
+
+ /* cleanup */
+ cleanup_amplify (amplify);
+}
+
+GST_END_TEST;
+
+GST_START_TEST (test_zero)
+{
+ GstElement *amplify;
+ GstBuffer *inbuffer, *outbuffer;
+ GstCaps *caps;
+ gint16 in[6] = { 24576, -16384, 256, -128, 0, -24576 };
+ gint16 out[6] = { 0, 0, 0, 0, 0, 0 };
+ gint16 *res;
+
+ amplify = setup_amplify ();
+ g_object_set (G_OBJECT (amplify), "amplification", 0.0, NULL);
+ fail_unless (gst_element_set_state (amplify,
+ GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS,
+ "could not set to playing");
+
+ inbuffer = gst_buffer_new_and_alloc (12);
+ memcpy (GST_BUFFER_DATA (inbuffer), in, 12);
+ fail_unless (memcmp (GST_BUFFER_DATA (inbuffer), in, 12) == 0);
+ caps = gst_caps_from_string (AMPLIFY_CAPS_STRING);
+ gst_buffer_set_caps (inbuffer, caps);
+ gst_caps_unref (caps);
+ ASSERT_BUFFER_REFCOUNT (inbuffer, "inbuffer", 1);
+
+ /* pushing gives away my reference ... */
+ fail_unless (gst_pad_push (mysrcpad, inbuffer) == GST_FLOW_OK);
+ /* ... and puts a new buffer on the global list */
+ fail_unless_equals_int (g_list_length (buffers), 1);
+ fail_if ((outbuffer = (GstBuffer *) buffers->data) == NULL);
+
+ res = (gint16 *) GST_BUFFER_DATA (outbuffer);
+ GST_INFO
+ ("expected %+5ld %+5ld %+5ld %+5ld %+5ld %+5ld real %+5ld %+5ld %+5ld %+5ld %+5ld %+5ld",
+ out[0], out[1], out[2], out[3], out[4], out[5], res[0], res[1], res[2],
+ res[3], res[4], res[5]);
+ fail_unless (memcmp (GST_BUFFER_DATA (outbuffer), out, 12) == 0);
+
+ /* cleanup */
+ cleanup_amplify (amplify);
+}
+
+GST_END_TEST;
+
+GST_START_TEST (test_050_clip)
+{
+ GstElement *amplify;
+ GstBuffer *inbuffer, *outbuffer;
+ GstCaps *caps;
+ gint16 in[6] = { 24576, -16384, 256, -128, 0, -24576 };
+ gint16 out[6] = { 12288, -8192, 128, -64, 0, -12288 };
+ gint16 *res;
+
+ amplify = setup_amplify ();
+ g_object_set (G_OBJECT (amplify), "amplification", 0.5, NULL);
+ fail_unless (gst_element_set_state (amplify,
+ GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS,
+ "could not set to playing");
+
+ inbuffer = gst_buffer_new_and_alloc (12);
+ memcpy (GST_BUFFER_DATA (inbuffer), in, 12);
+ fail_unless (memcmp (GST_BUFFER_DATA (inbuffer), in, 12) == 0);
+ caps = gst_caps_from_string (AMPLIFY_CAPS_STRING);
+ gst_buffer_set_caps (inbuffer, caps);
+ gst_caps_unref (caps);
+ ASSERT_BUFFER_REFCOUNT (inbuffer, "inbuffer", 1);
+
+ /* pushing gives away my reference ... */
+ fail_unless (gst_pad_push (mysrcpad, inbuffer) == GST_FLOW_OK);
+ /* ... and puts a new buffer on the global list */
+ fail_unless_equals_int (g_list_length (buffers), 1);
+ fail_if ((outbuffer = (GstBuffer *) buffers->data) == NULL);
+
+ res = (gint16 *) GST_BUFFER_DATA (outbuffer);
+ GST_INFO
+ ("expected %+5ld %+5ld %+5ld %+5ld %+5ld %+5ld real %+5ld %+5ld %+5ld %+5ld %+5ld %+5ld",
+ out[0], out[1], out[2], out[3], out[4], out[5], res[0], res[1], res[2],
+ res[3], res[4], res[5]);
+ fail_unless (memcmp (GST_BUFFER_DATA (outbuffer), out, 12) == 0);
+
+ /* cleanup */
+ cleanup_amplify (amplify);
+}
+
+GST_END_TEST;
+
+GST_START_TEST (test_200_clip)
+{
+ GstElement *amplify;
+ GstBuffer *inbuffer, *outbuffer;
+ GstCaps *caps;
+ gint16 in[6] = { 24576, -16384, 256, -128, 0, -24576 };
+ gint16 out[6] = { G_MAXINT16, -32768, 512, -256, 0, G_MININT16 };
+ gint16 *res;
+
+ amplify = setup_amplify ();
+ g_object_set (G_OBJECT (amplify), "amplification", 2.0, NULL);
+ fail_unless (gst_element_set_state (amplify,
+ GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS,
+ "could not set to playing");
+
+ inbuffer = gst_buffer_new_and_alloc (12);
+ memcpy (GST_BUFFER_DATA (inbuffer), in, 12);
+ fail_unless (memcmp (GST_BUFFER_DATA (inbuffer), in, 12) == 0);
+ caps = gst_caps_from_string (AMPLIFY_CAPS_STRING);
+ gst_buffer_set_caps (inbuffer, caps);
+ gst_caps_unref (caps);
+ ASSERT_BUFFER_REFCOUNT (inbuffer, "inbuffer", 1);
+
+ /* pushing gives away my reference ... */
+ fail_unless (gst_pad_push (mysrcpad, inbuffer) == GST_FLOW_OK);
+ /* ... and puts a new buffer on the global list */
+ fail_unless_equals_int (g_list_length (buffers), 1);
+ fail_if ((outbuffer = (GstBuffer *) buffers->data) == NULL);
+
+ res = (gint16 *) GST_BUFFER_DATA (outbuffer);
+ GST_INFO
+ ("expected %+5ld %+5ld %+5ld %+5ld %+5ld %+5ld real %+5ld %+5ld %+5ld %+5ld %+5ld %+5ld",
+ out[0], out[1], out[2], out[3], out[4], out[5], res[0], res[1], res[2],
+ res[3], res[4], res[5]);
+ fail_unless (memcmp (GST_BUFFER_DATA (outbuffer), out, 12) == 0);
+
+ /* cleanup */
+ cleanup_amplify (amplify);
+}
+
+GST_END_TEST;
+
+GST_START_TEST (test_050_wrap_negative)
+{
+ GstElement *amplify;
+ GstBuffer *inbuffer, *outbuffer;
+ GstCaps *caps;
+ gint16 in[6] = { 24576, -16384, 256, -128, 0, -24576 };
+ gint16 out[6] = { 12288, -8192, 128, -64, 0, -12288 };
+ gint16 *res;
+
+ amplify = setup_amplify ();
+ g_object_set (G_OBJECT (amplify), "amplification", 0.5, NULL);
+ g_object_set (G_OBJECT (amplify), "clipping-method", 1, NULL);
+ fail_unless (gst_element_set_state (amplify,
+ GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS,
+ "could not set to playing");
+
+ inbuffer = gst_buffer_new_and_alloc (12);
+ memcpy (GST_BUFFER_DATA (inbuffer), in, 12);
+ fail_unless (memcmp (GST_BUFFER_DATA (inbuffer), in, 12) == 0);
+ caps = gst_caps_from_string (AMPLIFY_CAPS_STRING);
+ gst_buffer_set_caps (inbuffer, caps);
+ gst_caps_unref (caps);
+ ASSERT_BUFFER_REFCOUNT (inbuffer, "inbuffer", 1);
+
+ /* pushing gives away my reference ... */
+ fail_unless (gst_pad_push (mysrcpad, inbuffer) == GST_FLOW_OK);
+ /* ... and puts a new buffer on the global list */
+ fail_unless_equals_int (g_list_length (buffers), 1);
+ fail_if ((outbuffer = (GstBuffer *) buffers->data) == NULL);
+
+ res = (gint16 *) GST_BUFFER_DATA (outbuffer);
+ GST_INFO
+ ("expected %+5ld %+5ld %+5ld %+5ld %+5ld %+5ld real %+5ld %+5ld %+5ld %+5ld %+5ld %+5ld",
+ out[0], out[1], out[2], out[3], out[4], out[5], res[0], res[1], res[2],
+ res[3], res[4], res[5]);
+ fail_unless (memcmp (GST_BUFFER_DATA (outbuffer), out, 12) == 0);
+
+ /* cleanup */
+ cleanup_amplify (amplify);
+}
+
+GST_END_TEST;
+
+GST_START_TEST (test_200_wrap_negative)
+{
+ GstElement *amplify;
+ GstBuffer *inbuffer, *outbuffer;
+ GstCaps *caps;
+ gint16 in[6] = { 24576, -16384, 256, -128, 0, -24576 };
+ gint16 out[6] = { -16384, -32768, 512, -256, 0, 16384 };
+ gint16 *res;
+
+ amplify = setup_amplify ();
+ g_object_set (G_OBJECT (amplify), "amplification", 2.0, NULL);
+ g_object_set (G_OBJECT (amplify), "clipping-method", 1, NULL);
+ fail_unless (gst_element_set_state (amplify,
+ GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS,
+ "could not set to playing");
+
+ inbuffer = gst_buffer_new_and_alloc (12);
+ memcpy (GST_BUFFER_DATA (inbuffer), in, 12);
+ fail_unless (memcmp (GST_BUFFER_DATA (inbuffer), in, 12) == 0);
+ caps = gst_caps_from_string (AMPLIFY_CAPS_STRING);
+ gst_buffer_set_caps (inbuffer, caps);
+ gst_caps_unref (caps);
+ ASSERT_BUFFER_REFCOUNT (inbuffer, "inbuffer", 1);
+
+ /* pushing gives away my reference ... */
+ fail_unless (gst_pad_push (mysrcpad, inbuffer) == GST_FLOW_OK);
+ /* ... and puts a new buffer on the global list */
+ fail_unless_equals_int (g_list_length (buffers), 1);
+ fail_if ((outbuffer = (GstBuffer *) buffers->data) == NULL);
+
+ res = (gint16 *) GST_BUFFER_DATA (outbuffer);
+ GST_INFO
+ ("expected %+5ld %+5ld %+5ld %+5ld %+5ld %+5ld real %+5ld %+5ld %+5ld %+5ld %+5ld %+5ld",
+ out[0], out[1], out[2], out[3], out[4], out[5], res[0], res[1], res[2],
+ res[3], res[4], res[5]);
+ fail_unless (memcmp (GST_BUFFER_DATA (outbuffer), out, 12) == 0);
+
+ /* cleanup */
+ cleanup_amplify (amplify);
+}
+
+GST_END_TEST;
+
+GST_START_TEST (test_050_wrap_positive)
+{
+ GstElement *amplify;
+ GstBuffer *inbuffer, *outbuffer;
+ GstCaps *caps;
+ gint16 in[6] = { 24576, -16384, 256, -128, 0, -24576 };
+ gint16 out[6] = { 12288, -8192, 128, -64, 0, -12288 };
+ gint16 *res;
+
+ amplify = setup_amplify ();
+ g_object_set (G_OBJECT (amplify), "amplification", 0.5, NULL);
+ g_object_set (G_OBJECT (amplify), "clipping-method", 2, NULL);
+ fail_unless (gst_element_set_state (amplify,
+ GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS,
+ "could not set to playing");
+
+ inbuffer = gst_buffer_new_and_alloc (12);
+ memcpy (GST_BUFFER_DATA (inbuffer), in, 12);
+ fail_unless (memcmp (GST_BUFFER_DATA (inbuffer), in, 12) == 0);
+ caps = gst_caps_from_string (AMPLIFY_CAPS_STRING);
+ gst_buffer_set_caps (inbuffer, caps);
+ gst_caps_unref (caps);
+ ASSERT_BUFFER_REFCOUNT (inbuffer, "inbuffer", 1);
+
+ /* pushing gives away my reference ... */
+ fail_unless (gst_pad_push (mysrcpad, inbuffer) == GST_FLOW_OK);
+ /* ... and puts a new buffer on the global list */
+ fail_unless_equals_int (g_list_length (buffers), 1);
+ fail_if ((outbuffer = (GstBuffer *) buffers->data) == NULL);
+
+ res = (gint16 *) GST_BUFFER_DATA (outbuffer);
+ GST_INFO
+ ("expected %+5ld %+5ld %+5ld %+5ld %+5ld %+5ld real %+5ld %+5ld %+5ld %+5ld %+5ld %+5ld",
+ out[0], out[1], out[2], out[3], out[4], out[5], res[0], res[1], res[2],
+ res[3], res[4], res[5]);
+ fail_unless (memcmp (GST_BUFFER_DATA (outbuffer), out, 12) == 0);
+
+ /* cleanup */
+ cleanup_amplify (amplify);
+}
+
+GST_END_TEST;
+
+GST_START_TEST (test_200_wrap_positive)
+{
+ GstElement *amplify;
+ GstBuffer *inbuffer, *outbuffer;
+ GstCaps *caps;
+ gint16 in[6] = { 24576, -16384, 256, -128, 0, -24576 };
+ gint16 out[6] = { 16382, -32768, 512, -256, 0, -16384 };
+ gint16 *res;
+
+ amplify = setup_amplify ();
+ g_object_set (G_OBJECT (amplify), "amplification", 2.0, NULL);
+ g_object_set (G_OBJECT (amplify), "clipping-method", 2, NULL);
+ fail_unless (gst_element_set_state (amplify,
+ GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS,
+ "could not set to playing");
+
+ inbuffer = gst_buffer_new_and_alloc (12);
+ memcpy (GST_BUFFER_DATA (inbuffer), in, 12);
+ fail_unless (memcmp (GST_BUFFER_DATA (inbuffer), in, 12) == 0);
+ caps = gst_caps_from_string (AMPLIFY_CAPS_STRING);
+ gst_buffer_set_caps (inbuffer, caps);
+ gst_caps_unref (caps);
+ ASSERT_BUFFER_REFCOUNT (inbuffer, "inbuffer", 1);
+
+ /* pushing gives away my reference ... */
+ fail_unless (gst_pad_push (mysrcpad, inbuffer) == GST_FLOW_OK);
+ /* ... and puts a new buffer on the global list */
+ fail_unless_equals_int (g_list_length (buffers), 1);
+ fail_if ((outbuffer = (GstBuffer *) buffers->data) == NULL);
+
+ res = (gint16 *) GST_BUFFER_DATA (outbuffer);
+ GST_INFO
+ ("expected %+5ld %+5ld %+5ld %+5ld %+5ld %+5ld real %+5ld %+5ld %+5ld %+5ld %+5ld %+5ld",
+ out[0], out[1], out[2], out[3], out[4], out[5], res[0], res[1], res[2],
+ res[3], res[4], res[5]);
+ fail_unless (memcmp (GST_BUFFER_DATA (outbuffer), out, 12) == 0);
+
+ /* cleanup */
+ cleanup_amplify (amplify);
+}
+
+GST_END_TEST;
+
+Suite *
+amplify_suite (void)
+{
+ Suite *s = suite_create ("amplify");
+ TCase *tc_chain = tcase_create ("general");
+
+ suite_add_tcase (s, tc_chain);
+ tcase_add_test (tc_chain, test_passthrough);
+ tcase_add_test (tc_chain, test_zero);
+ tcase_add_test (tc_chain, test_050_clip);
+ tcase_add_test (tc_chain, test_200_clip);
+ tcase_add_test (tc_chain, test_050_wrap_negative);
+ tcase_add_test (tc_chain, test_200_wrap_negative);
+ tcase_add_test (tc_chain, test_050_wrap_positive);
+ tcase_add_test (tc_chain, test_200_wrap_positive);
+ return s;
+}
+
+int
+main (int argc, char **argv)
+{
+ int nf;
+
+ Suite *s = amplify_suite ();
+ SRunner *sr = srunner_create (s);
+
+ gst_check_init (&argc, &argv);
+
+ srunner_run_all (sr, CK_NORMAL);
+ nf = srunner_ntests_failed (sr);
+ srunner_free (sr);
+
+ return nf;
+}