gstreamer/gst/volume/gstvolume.c

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/* -*- c-basic-offset: 2 -*-
* GStreamer
* Copyright (C) 1999-2001 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include <gst/gst.h>
#include <gst/base/gstbasetransform.h>
#include <gst/audio/audio.h>
#include <gst/control/control.h>
#include <gst/interfaces/mixer.h>
#include "gstvolume.h"
/* some defines for audio processing */
/* the volume factor is a range from 0.0 to (arbitrary) 4.0
* we map 1.0 to VOLUME_UNITY_INT
*/
#define VOLUME_UNITY_INT 8192 /* internal int for unity */
#define VOLUME_UNITY_BIT_SHIFT 13 /* number of bits to shift
for unity */
#define VOLUME_MAX_DOUBLE 4.0
#define VOLUME_MAX_INT16 32767
#define VOLUME_MIN_INT16 -32768
/* number of steps we use for the mixer interface to go from 0.0 to 1.0 */
# define VOLUME_STEPS 100
static GstElementDetails volume_details = {
"Volume",
"Filter/Effect/Audio",
"Set volume on audio/raw streams",
"Andy Wingo <wingo@pobox.com>",
};
/* Filter signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
enum
{
PROP_0,
PROP_SILENT,
PROP_MUTE,
PROP_VOLUME
};
static GstStaticPadTemplate volume_sink_factory =
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, "
"buffer-frames = (int) [ 0, MAX]; "
"audio/x-raw-int, "
"channels = (int) [ 1, MAX ], "
"rate = (int) [ 1, MAX ], "
"endianness = (int) BYTE_ORDER, "
"width = (int) 16, " "depth = (int) 16, " "signed = (bool) TRUE")
);
static GstStaticPadTemplate volume_src_factory = 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, "
"buffer-frames = (int) [ 0, MAX]; "
"audio/x-raw-int, "
"channels = (int) [ 1, MAX ], "
"rate = (int) [ 1, MAX ], "
"endianness = (int) BYTE_ORDER, "
"width = (int) 16, " "depth = (int) 16, " "signed = (bool) TRUE")
);
static void gst_volume_interface_init (GstImplementsInterfaceClass * klass);
static void gst_volume_mixer_init (GstMixerClass * iface);
#define _init_interfaces(type) \
{ \
static const GInterfaceInfo voliface_info = { \
(GInterfaceInitFunc) gst_volume_interface_init, \
NULL, \
NULL \
}; \
static const GInterfaceInfo volmixer_info = { \
(GInterfaceInitFunc) gst_volume_mixer_init, \
NULL, \
NULL \
}; \
\
g_type_add_interface_static (type, GST_TYPE_IMPLEMENTS_INTERFACE, \
&voliface_info); \
g_type_add_interface_static (type, GST_TYPE_MIXER, &volmixer_info); \
}
GST_BOILERPLATE_FULL (GstVolume, gst_volume, GstBaseTransform,
GST_TYPE_BASE_TRANSFORM, _init_interfaces);
static void volume_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void volume_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void volume_update_volume (const GValue * value, gpointer data);
static void volume_update_mute (const GValue * value, gpointer data);
static GstFlowReturn volume_transform (GstBaseTransform * base,
GstBuffer * inbuf, GstBuffer ** outbuf);
static void volume_process_float (GstVolume * filter, GstClockTime tstamp,
gpointer bytes, gint n_bytes);
static void volume_process_int16 (GstVolume * filter, GstClockTime tstamp,
gpointer bytes, gint n_bytes);
static gboolean
gst_volume_interface_supported (GstImplementsInterface * iface, GType type)
{
g_assert (type == GST_TYPE_MIXER);
return TRUE;
}
static void
gst_volume_interface_init (GstImplementsInterfaceClass * klass)
{
klass->supported = gst_volume_interface_supported;
}
static const GList *
gst_volume_list_tracks (GstMixer * mixer)
{
GstVolume *filter = GST_VOLUME (mixer);
g_return_val_if_fail (filter != NULL, NULL);
g_return_val_if_fail (GST_IS_VOLUME (filter), NULL);
return filter->tracklist;
}
static void
gst_volume_set_volume (GstMixer * mixer, GstMixerTrack * track, gint * volumes)
{
GstVolume *filter = GST_VOLUME (mixer);
g_return_if_fail (filter != NULL);
g_return_if_fail (GST_IS_VOLUME (filter));
gst_dpman_bypass_dparam (filter->dpman, "volume");
filter->volume_f = (gfloat) volumes[0] / VOLUME_STEPS;
filter->volume_i = filter->volume_f * VOLUME_UNITY_INT;
if (filter->mute) {
filter->real_vol_f = 0.0;
filter->real_vol_i = 0;
} else {
filter->real_vol_f = filter->volume_f;
filter->real_vol_i = filter->volume_i;
}
}
static void
gst_volume_get_volume (GstMixer * mixer, GstMixerTrack * track, gint * volumes)
{
GstVolume *filter = GST_VOLUME (mixer);
g_return_if_fail (filter != NULL);
g_return_if_fail (GST_IS_VOLUME (filter));
volumes[0] = (gint) filter->volume_f * VOLUME_STEPS;
}
static void
gst_volume_set_mute (GstMixer * mixer, GstMixerTrack * track, gboolean mute)
{
GstVolume *filter = GST_VOLUME (mixer);
g_return_if_fail (filter != NULL);
g_return_if_fail (GST_IS_VOLUME (filter));
gst_dpman_bypass_dparam (filter->dpman, "volume");
filter->mute = mute;
if (filter->mute) {
filter->real_vol_f = 0.0;
filter->real_vol_i = 0;
} else {
filter->real_vol_f = filter->volume_f;
filter->real_vol_i = filter->volume_i;
}
}
static void
gst_volume_mixer_init (GstMixerClass * klass)
{
GST_MIXER_TYPE (klass) = GST_MIXER_SOFTWARE;
/* default virtual functions */
klass->list_tracks = gst_volume_list_tracks;
klass->set_volume = gst_volume_set_volume;
klass->get_volume = gst_volume_get_volume;
klass->set_mute = gst_volume_set_mute;
}
static void
gst_volume_dispose (GObject * object)
{
GstVolume *volume;
volume = GST_VOLUME (object);
if (volume->dpman)
g_object_unref (G_OBJECT (volume->dpman));
volume->dpman = NULL;
if (volume->tracklist) {
if (volume->tracklist->data)
g_object_unref (volume->tracklist->data);
g_list_free (volume->tracklist);
volume->tracklist = NULL;
}
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gst_volume_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&volume_src_factory));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&volume_sink_factory));
gst_element_class_set_details (element_class, &volume_details);
}
static void
gst_volume_class_init (GstVolumeClass * klass)
{
GObjectClass *gobject_class;
gobject_class = (GObjectClass *) klass;
gobject_class->set_property = volume_set_property;
gobject_class->get_property = volume_get_property;
gobject_class->dispose = gst_volume_dispose;
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_MUTE,
g_param_spec_boolean ("mute", "mute", "mute", FALSE, G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_VOLUME,
g_param_spec_double ("volume", "volume", "volume",
0.0, VOLUME_MAX_DOUBLE, 1.0, G_PARAM_READWRITE));
GST_BASE_TRANSFORM_CLASS (klass)->transform = volume_transform;
}
static void
gst_volume_init (GstVolume * filter)
{
GstMixerTrack *track = NULL;
filter->mute = FALSE;
filter->volume_i = VOLUME_UNITY_INT;
filter->volume_f = 1.0;
filter->real_vol_i = VOLUME_UNITY_INT;
filter->real_vol_f = 1.0;
filter->tracklist = NULL;
filter->dpman = gst_dpman_new ("volume_dpman", GST_ELEMENT (filter));
gst_dpman_add_required_dparam_callback (filter->dpman,
g_param_spec_int ("mute", "Mute", "Mute the audio",
0, 1, 0, G_PARAM_READWRITE), "int", volume_update_mute, filter);
gst_dpman_add_required_dparam_callback (filter->dpman,
g_param_spec_double ("volume", "Volume", "Volume of the audio",
0.0, VOLUME_MAX_DOUBLE, 1.0, G_PARAM_READWRITE),
"scalar", volume_update_volume, filter);
track = g_object_new (GST_TYPE_MIXER_TRACK, NULL);
if (GST_IS_MIXER_TRACK (track)) {
track->label = g_strdup ("volume");
track->num_channels = 1;
track->min_volume = 0;
track->max_volume = VOLUME_STEPS;
track->flags = GST_MIXER_TRACK_SOFTWARE;
filter->tracklist = g_list_append (filter->tracklist, track);
}
}
static void
volume_typefind (GstVolume * filter, const GstStructure * structure)
{
const gchar *mimetype;
mimetype = gst_structure_get_name (structure);
if (strcmp (mimetype, "audio/x-raw-int") == 0)
filter->process = volume_process_int16;
else if (strcmp (mimetype, "audio/x-raw-float") == 0)
filter->process = volume_process_float;
}
static GstFlowReturn
volume_transform (GstBaseTransform * base, GstBuffer * inbuf,
GstBuffer ** outbuf)
{
GstVolume *filter = GST_VOLUME (base);
if (G_UNLIKELY (!filter->process)) {
GstCaps *caps = GST_BUFFER_CAPS (inbuf);
if (gst_caps_get_size (caps) == 1)
volume_typefind (filter, gst_caps_get_structure (caps, 0));
if (!filter->process) {
GST_ELEMENT_ERROR (filter, CORE, NEGOTIATION,
("Invalid caps on first buffer"), NULL);
return GST_FLOW_UNEXPECTED;
}
}
*outbuf = gst_buffer_make_writable (inbuf);
filter->process (filter, GST_BUFFER_TIMESTAMP (*outbuf),
GST_BUFFER_DATA (*outbuf), GST_BUFFER_SIZE (*outbuf));
return GST_FLOW_OK;
}
static void
volume_process_float (GstVolume * filter, GstClockTime tstamp,
gpointer bytes, gint n_bytes)
{
gfloat *data;
gint i, num_samples;
data = (gfloat *) bytes;
num_samples = n_bytes / sizeof (gfloat);
GST_DPMAN_PREPROCESS (filter->dpman, num_samples, tstamp);
i = 0;
while (GST_DPMAN_PROCESS (filter->dpman, i)) {
data[i++] *= filter->real_vol_f;
}
}
static void
volume_process_int16 (GstVolume * filter, GstClockTime tstamp,
gpointer bytes, gint n_bytes)
{
gint16 *data;
gint i, num_samples;
data = (gint16 *) bytes;
num_samples = n_bytes / sizeof (gint16);
GST_DPMAN_PREPROCESS (filter->dpman, num_samples, tstamp);
i = 0;
/* need... liboil... */
while (GST_DPMAN_PROCESS (filter->dpman, i)) {
/* only clamp if the gain is greater than 1.0 */
if (filter->real_vol_i > VOLUME_UNITY_INT) {
while (i < GST_DPMAN_NEXT_UPDATE_FRAME (filter->dpman)) {
/* we use bitshifting instead of dividing by UNITY_INT for speed */
data[i] =
(gint16) CLAMP ((filter->real_vol_i *
(gint) data[i]) >> VOLUME_UNITY_BIT_SHIFT, VOLUME_MIN_INT16,
VOLUME_MAX_INT16);
i++;
}
} else {
while (i < GST_DPMAN_NEXT_UPDATE_FRAME (filter->dpman)) {
/* we use bitshifting instead of dividing by UNITY_INT for speed */
data[i] =
(gint16) ((filter->real_vol_i *
(gint) data[i]) >> VOLUME_UNITY_BIT_SHIFT);
i++;
}
}
}
}
static void
volume_update_mute (const GValue * value, gpointer data)
{
GstVolume *filter = (GstVolume *) data;
g_return_if_fail (GST_IS_VOLUME (filter));
if (G_VALUE_HOLDS_BOOLEAN (value)) {
filter->mute = g_value_get_boolean (value);
} else if (G_VALUE_HOLDS_INT (value)) {
filter->mute = (g_value_get_int (value) == 1);
}
if (filter->mute) {
filter->real_vol_f = 0.0;
filter->real_vol_i = 0;
} else {
filter->real_vol_f = filter->volume_f;
filter->real_vol_i = filter->volume_i;
}
}
static void
volume_update_volume (const GValue * value, gpointer data)
{
GstVolume *filter = (GstVolume *) data;
g_return_if_fail (GST_IS_VOLUME (filter));
filter->volume_f = g_value_get_double (value);
filter->volume_i = filter->volume_f * VOLUME_UNITY_INT;
if (filter->mute) {
filter->real_vol_f = 0.0;
filter->real_vol_i = 0;
} else {
filter->real_vol_f = filter->volume_f;
filter->real_vol_i = filter->volume_i;
}
}
static void
volume_set_property (GObject * object, guint prop_id, const GValue * value,
GParamSpec * pspec)
{
GstVolume *filter = GST_VOLUME (object);
switch (prop_id) {
case PROP_MUTE:
gst_dpman_bypass_dparam (filter->dpman, "mute");
volume_update_mute (value, filter);
break;
case PROP_VOLUME:
gst_dpman_bypass_dparam (filter->dpman, "volume");
volume_update_volume (value, filter);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
volume_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstVolume *filter = GST_VOLUME (object);
switch (prop_id) {
case PROP_MUTE:
g_value_set_boolean (value, filter->mute);
break;
case PROP_VOLUME:
g_value_set_double (value, filter->volume_f);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
plugin_init (GstPlugin * plugin)
{
gst_control_init (NULL, NULL);
return gst_element_register (plugin, "volume", GST_RANK_NONE,
GST_TYPE_VOLUME);
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"volume",
"element for controlling audio volume",
plugin_init, VERSION, GST_LICENSE, GST_PACKAGE, GST_ORIGIN)