gstreamer/ext/openal/gstopenalsrc.c

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/*
* GStreamer
* Copyright (C) 2005 Thomas Vander Stichele <thomas@apestaart.org>
* Copyright (C) 2005 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
* Copyright (C) 2008 Victor Lin <bornstub@gmail.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* Alternatively, the contents of this file may be used under the
* GNU Lesser General Public License Version 2.1 (the "LGPL"), in
* which case the following provisions apply instead of the ones
* mentioned above:
*
* 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-openalsrc
* @short_description: record sound from your sound card using OpenAL
*
* <refsect2>
* <para>
* This element lets you record sound using the OpenAL
* </para>
* <title>Example pipelines</title>
* <para>
* <programlisting>
* gst-launch -v openalsrc ! audioconvert ! vorbisenc ! oggmux ! filesink location=mymusic.ogg
* </programlisting>
* will record sound from your sound card using OpenAL and encode it to an Ogg/Vorbis file
* </para>
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <gst/gst.h>
#include <gst/gsterror.h>
#include "gstopenalsrc.h"
GST_DEBUG_CATEGORY_STATIC (openalsrc_debug);
#define GST_CAT_DEFAULT openalsrc_debug
#define DEFAULT_DEVICE NULL
#define DEFAULT_DEVICE_NAME NULL
/**
Filter signals and args
**/
enum
{
/* FILL ME */
LAST_SIGNAL
};
/**
Properties
**/
enum
{
PROP_0,
PROP_DEVICE,
PROP_DEVICE_NAME
};
static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("audio/x-raw-int, "
"endianness = (int) BYTE_ORDER, "
"signed = (boolean) TRUE, "
"width = (int) 16, "
"depth = (int) 16, "
"rate = (int) [ 1, MAX ], " "channels = (int) [ 1, 2 ]; "
"audio/x-raw-int, "
"signed = (boolean) TRUE, "
"width = (int) 8, "
"depth = (int) 8, "
"rate = (int) [ 1, MAX ], " "channels = (int) [ 1, 2 ]")
);
GST_BOILERPLATE (GstOpenalSrc, gst_openal_src, GstAudioSrc, GST_TYPE_AUDIO_SRC);
static void gst_openal_src_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_openal_src_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static gboolean gst_openal_src_open (GstAudioSrc * src);
static gboolean
gst_openal_src_prepare (GstAudioSrc * src, GstRingBufferSpec * spec);
static gboolean gst_openal_src_unprepare (GstAudioSrc * src);
static gboolean gst_openal_src_close (GstAudioSrc * src);
static guint
gst_openal_src_read (GstAudioSrc * src, gpointer data, guint length);
static guint gst_openal_src_delay (GstAudioSrc * src);
static void gst_openal_src_reset (GstAudioSrc * src);
static void gst_openal_src_finalize (GObject * object);
static void
gst_openal_src_base_init (gpointer gclass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (gclass);
gst_element_class_set_metadata (element_class, "OpenAL src",
"Source/Audio",
"OpenAL source capture audio from device",
"Victor Lin <bornstub@gmail.com>");
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&src_factory)
);
}
static void
gst_openal_src_class_init (GstOpenalSrcClass * klass)
{
GObjectClass *gobject_class;
GstAudioSrcClass *gstaudio_src_class;
gobject_class = G_OBJECT_CLASS (klass);
gstaudio_src_class = GST_AUDIO_SRC_CLASS (klass);
GST_DEBUG_CATEGORY_INIT (openalsrc_debug, "openalsrc",
0, "OpenAL source capture audio from device");
gobject_class->set_property = gst_openal_src_set_property;
gobject_class->get_property = gst_openal_src_get_property;
gobject_class->finalize = gst_openal_src_finalize;
gstaudio_src_class->open = GST_DEBUG_FUNCPTR (gst_openal_src_open);
gstaudio_src_class->prepare = GST_DEBUG_FUNCPTR (gst_openal_src_prepare);
gstaudio_src_class->unprepare = GST_DEBUG_FUNCPTR (gst_openal_src_unprepare);
gstaudio_src_class->close = GST_DEBUG_FUNCPTR (gst_openal_src_close);
gstaudio_src_class->read = GST_DEBUG_FUNCPTR (gst_openal_src_read);
gstaudio_src_class->delay = GST_DEBUG_FUNCPTR (gst_openal_src_delay);
gstaudio_src_class->reset = GST_DEBUG_FUNCPTR (gst_openal_src_reset);
g_object_class_install_property (gobject_class,
PROP_DEVICE,
g_param_spec_string ("device",
"Device",
"Specific capture device to open, NULL indicate default device",
DEFAULT_DEVICE, G_PARAM_READWRITE)
);
g_object_class_install_property (gobject_class,
PROP_DEVICE_NAME,
g_param_spec_string ("device-name",
"Device name",
"Readable name of device", DEFAULT_DEVICE_NAME, G_PARAM_READABLE)
);
}
static void
gst_openal_src_init (GstOpenalSrc * osrc, GstOpenalSrcClass * gclass)
{
osrc->deviceName = g_strdup (DEFAULT_DEVICE_NAME);
osrc->device = DEFAULT_DEVICE;
osrc->deviceHandle = NULL;
}
static void
gst_openal_src_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstOpenalSrc *osrc = GST_OPENAL_SRC (object);
switch (prop_id) {
case PROP_DEVICE:
osrc->device = g_value_dup_string (value);
break;
case PROP_DEVICE_NAME:
osrc->deviceName = g_value_dup_string (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_openal_src_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstOpenalSrc *osrc = GST_OPENAL_SRC (object);
switch (prop_id) {
case PROP_DEVICE:
g_value_set_string (value, osrc->device);
break;
case PROP_DEVICE_NAME:
g_value_set_string (value, osrc->deviceName);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
gst_openal_src_open (GstAudioSrc * asrc)
{
/* We don't do anything here */
return TRUE;
}
static gboolean
gst_openal_src_prepare (GstAudioSrc * asrc, GstRingBufferSpec * spec)
{
GstOpenalSrc *osrc = GST_OPENAL_SRC (asrc);
ALenum format;
guint64 bufferSize;
switch (spec->width) {
case 8:
format = AL_FORMAT_STEREO8;
break;
case 16:
format = AL_FORMAT_STEREO16;
break;
default:
g_assert_not_reached ();
}
bufferSize =
spec->buffer_time * spec->rate * spec->bytes_per_sample / 1000000;
GST_INFO_OBJECT (osrc, "Open device : %s", osrc->deviceName);
osrc->deviceHandle =
alcCaptureOpenDevice (osrc->device, spec->rate, format, bufferSize);
if (!osrc->deviceHandle) {
GST_ELEMENT_ERROR (osrc,
RESOURCE,
FAILED,
("Can't open device \"%s\"", osrc->device),
("Can't open device \"%s\"", osrc->device)
);
return FALSE;
}
osrc->deviceName =
g_strdup (alcGetString (osrc->deviceHandle, ALC_DEVICE_SPECIFIER));
osrc->bytes_per_sample = spec->bytes_per_sample;
GST_INFO_OBJECT (osrc, "Start capture");
alcCaptureStart (osrc->deviceHandle);
return TRUE;
}
static gboolean
gst_openal_src_unprepare (GstAudioSrc * asrc)
{
GstOpenalSrc *osrc = GST_OPENAL_SRC (asrc);
GST_INFO_OBJECT (osrc, "Close device : %s", osrc->deviceName);
if (osrc->deviceHandle) {
alcCaptureStop (osrc->deviceHandle);
alcCaptureCloseDevice (osrc->deviceHandle);
}
return TRUE;
}
static gboolean
gst_openal_src_close (GstAudioSrc * asrc)
{
/* We don't do anything here */
return TRUE;
}
static guint
gst_openal_src_read (GstAudioSrc * asrc, gpointer data, guint length)
{
GstOpenalSrc *osrc = GST_OPENAL_SRC (asrc);
gint samples;
alcGetIntegerv (osrc->deviceHandle, ALC_CAPTURE_SAMPLES, sizeof (samples),
&samples);
if (samples * osrc->bytes_per_sample > length) {
samples = length / osrc->bytes_per_sample;
}
if (samples) {
GST_DEBUG_OBJECT (osrc, "Read samples : %d", samples);
alcCaptureSamples (osrc->deviceHandle, data, samples);
}
return samples * osrc->bytes_per_sample;
}
static guint
gst_openal_src_delay (GstAudioSrc * asrc)
{
GstOpenalSrc *osrc = GST_OPENAL_SRC (asrc);
gint samples;
alcGetIntegerv (osrc->deviceHandle, ALC_CAPTURE_SAMPLES, sizeof (samples),
&samples);
return samples;
}
static void
gst_openal_src_reset (GstAudioSrc * asrc)
{
/* We don't do anything here */
}
static void
gst_openal_src_finalize (GObject * object)
{
GstOpenalSrc *osrc = GST_OPENAL_SRC (object);
g_free (osrc->deviceName);
g_free (osrc->device);
G_OBJECT_CLASS (parent_class)->finalize (object);
}