gstreamer/ext/xine/xineaudiosink.c

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/* GStreamer
* Copyright (C) 2004 Benjamin Otte <in7y118@public.uni-hamburg.de>
*
* 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 <gst/gst.h>
#include "gstxine.h"
#include <xine/audio_out.h>
#include <xine/xine_internal.h>
#include <xine/plugin_catalog.h>
#define GST_TYPE_XINE_AUDIO_SINK \
(gst_xine_audio_sink_get_type())
#define GST_XINE_AUDIO_SINK(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_XINE_AUDIO_SINK,GstXineAudioSink))
#define GST_XINE_AUDIO_SINK_GET_CLASS(obj) \
(G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_XINE_AUDIO_SINK, GstXineAudioSinkClass))
#define GST_XINE_AUDIO_SINK_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_XINE_AUDIO_SINK,GstXineAudioSinkClass))
#define GST_IS_XINE_AUDIO_SINK(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_XINE_AUDIO_SINK))
#define GST_IS_XINE_AUDIO_SINK_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_XINE_AUDIO_SINK))
GType gst_xine_audio_sink_get_type (void);
typedef struct _GstXineAudioSink GstXineAudioSink;
typedef struct _GstXineAudioSinkClass GstXineAudioSinkClass;
struct _GstXineAudioSink
{
GstXine parent;
GstPad *sinkpad;
ao_driver_t *driver;
guint open; /* number of bytes per sample or 0 if driver not open */
};
struct _GstXineAudioSinkClass
{
GstXineClass parent_class;
plugin_node_t *plugin_node;
};
/** GstXineAudioSink ***********************************************************/
GST_BOILERPLATE (GstXineAudioSink, gst_xine_audio_sink, GstXine, GST_TYPE_XINE);
static GstStateChangeReturn
gst_xine_audio_sink_change_state (GstElement * element,
GstStateChange transition);
static void
gst_xine_audio_sink_base_init (gpointer g_class)
{
}
static void
gst_xine_audio_sink_class_init (GstXineAudioSinkClass * klass)
{
GstElementClass *element = GST_ELEMENT_CLASS (klass);
element->change_state = gst_xine_audio_sink_change_state;
}
static void
gst_xine_audio_sink_init (GstXineAudioSink * xine,
GstXineAudioSinkClass * g_class)
{
}
static void
gst_xine_audio_sink_chain (GstPad * pad, GstData * data)
{
GstXineAudioSink *xine =
GST_XINE_AUDIO_SINK (gst_object_get_parent (GST_OBJECT (pad)));
while (xine->driver->write (xine->driver, (guint16 *) GST_BUFFER_DATA (data),
GST_BUFFER_SIZE (data) / xine->open) == 0);
gst_data_unref (GST_DATA (data));
}
static GstStateChangeReturn
gst_xine_audio_sink_change_state (GstElement * element,
GstStateChange transition)
{
GstXineAudioSink *xine = GST_XINE_AUDIO_SINK (element);
audio_driver_class_t *driver =
(audio_driver_class_t *) GST_XINE_AUDIO_SINK_GET_CLASS (xine)->
plugin_node->plugin_class;
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
if (driver == NULL) {
xine_audio_port_t *port =
xine_open_audio_driver (GST_XINE_GET_CLASS (xine)->xine,
GST_XINE_AUDIO_SINK_GET_CLASS (xine)->plugin_node->info->id, NULL);
if (!port)
return GST_STATE_CHANGE_FAILURE;
port->exit (port);
driver =
(audio_driver_class_t *) GST_XINE_AUDIO_SINK_GET_CLASS (xine)->
plugin_node->plugin_class;
if (driver == NULL)
return GST_STATE_CHANGE_FAILURE;
}
xine->driver = driver->open_plugin (driver, NULL);
if (!xine->driver)
return GST_STATE_CHANGE_FAILURE;
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
break;
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
break;
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
if (xine->open != 0)
xine->driver->close (xine->driver);
xine->open = 0;
break;
case GST_STATE_CHANGE_READY_TO_NULL:
xine->driver->exit (xine->driver);
xine->driver = NULL;
break;
default:
GST_ERROR_OBJECT (element, "invalid state change");
break;
}
return GST_CALL_PARENT_WITH_DEFAULT (GST_ELEMENT_CLASS, change_state,
(element), GST_STATE_CHANGE_SUCCESS);
}
static GstCaps *
_xine_audio_sink_get_caps (GstPad * pad)
{
GstXineAudioSink *xine =
GST_XINE_AUDIO_SINK (gst_object_get_parent (GST_OBJECT (pad)));
GstCaps *caps, *ret = gst_caps_new_empty ();
guint32 capa, channels;
if (!xine->driver)
return gst_caps_copy (gst_pad_get_pad_template_caps (pad));
capa = xine->driver->get_capabilities (xine->driver);
channels = capa & (AO_CAP_MODE_MONO | AO_CAP_MODE_STEREO);
if (channels == 0) {
/* neither mono nor stereo supported, die */
return ret;
}
/* this loop is messy */
capa &= AO_CAP_8BITS;
do {
if (capa & AO_CAP_8BITS) {
caps = gst_caps_from_string ("audio/x-raw-int, "
"signed = (boolean) FALSE, "
"width = (int) 8, "
"depth = (int) 8, " "rate = (int) [ 8000, 192000 ]");
capa &= ~AO_CAP_8BITS;
} else {
caps = gst_caps_from_string ("audio/x-raw-int, "
"endianness = (int) BYTE_ORDER, "
"signed = (boolean) TRUE, "
"width = (int) 16, "
"depth = (int) 16, " "rate = (int) [ 8000, 192000 ]");
capa = -1;
}
switch (channels) {
case AO_CAP_MODE_MONO | AO_CAP_MODE_STEREO:
gst_caps_set_simple (caps, "channels", GST_TYPE_INT_RANGE, 1, 2, NULL);
break;
case AO_CAP_MODE_MONO:
gst_caps_set_simple (caps, "channels", G_TYPE_INT, 1, NULL);
break;
case AO_CAP_MODE_STEREO:
gst_caps_set_simple (caps, "channels", G_TYPE_INT, 2, NULL);
break;
default:
g_assert_not_reached ();
break;
}
gst_caps_append (ret, caps);
} while (capa != -1);
return ret;
}
static GstPadLinkReturn
_xine_audio_sink_link (GstPad * pad, const GstCaps * caps)
{
GstStructure *structure = gst_caps_get_structure (caps, 0);
GstXineAudioSink *xine =
GST_XINE_AUDIO_SINK (gst_object_get_parent (GST_OBJECT (pad)));
guint channels, temp, rate, width;
int mode;
if (!gst_structure_get_int (structure, "channels", &channels))
return GST_PAD_LINK_REFUSED;
mode = (channels == 1) ? AO_CAP_MODE_MONO : AO_CAP_MODE_STEREO;
if (!gst_structure_get_int (structure, "rate", &rate))
return GST_PAD_LINK_REFUSED;
if (!gst_structure_get_int (structure, "width", &width))
return GST_PAD_LINK_REFUSED;
if (xine->open != 0)
xine->driver->close (xine->driver);
xine->open = 0;
temp = xine->driver->open (xine->driver, width, rate, mode);
if (temp == 0)
return GST_PAD_LINK_REFUSED;
xine->open = channels * width / 8;
if (temp != rate) {
/* FIXME? */
GST_WARNING_OBJECT (xine, "rates don't match (requested: %u, got %u)", rate,
temp);
}
return GST_PAD_LINK_OK;
}
/** GstXineAudioSink subclasses ************************************************/
static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("audio/x-raw-int, "
"signed = (boolean) FALSE, "
"width = (int) 8, "
"depth = (int) 8, "
"rate = (int) [ 8000, 192000 ], "
"channels = (int) [1, 2]; "
"audio/x-raw-int, "
"endianness = (int) BYTE_ORDER, "
"signed = (boolean) TRUE, "
"width = (int) 16, "
"depth = (int) 16, "
"rate = (int) [ 8000, 192000 ], " "channels = (int) [1, 2]")
);
static void
gst_xine_audio_sink_subclass_init (gpointer g_class, gpointer class_data)
{
GstXineAudioSinkClass *xine_class = GST_XINE_AUDIO_SINK_CLASS (g_class);
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
GstElementDetails details = GST_ELEMENT_DETAILS (NULL,
"Source",
NULL,
"Benjamin Otte <otte@gnome.org>");
xine_class->plugin_node = class_data;
details.longname =
g_strdup_printf ("%s xine audio sink", xine_class->plugin_node->info->id);
details.description =
g_strdup_printf ("%s audio output using Xine",
xine_class->plugin_node->info->id);
gst_element_class_set_details (element_class, &details);
g_free (details.longname);
g_free (details.description);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&sink_template));
}
static void
gst_xine_audio_sink_sub_init (GTypeInstance * instance, gpointer g_class)
{
GstElementClass *klass = GST_ELEMENT_GET_CLASS (instance);
GstXineAudioSink *xine = GST_XINE_AUDIO_SINK (instance);
xine->sinkpad =
gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
"sink"), "sink");
gst_pad_set_chain_function (xine->sinkpad, gst_xine_audio_sink_chain);
gst_pad_set_getcaps_function (xine->sinkpad, _xine_audio_sink_get_caps);
gst_pad_set_link_function (xine->sinkpad, _xine_audio_sink_link);
gst_element_add_pad (GST_ELEMENT (xine), xine->sinkpad);
}
gboolean
gst_xine_audio_sink_init_plugin (GstPlugin * plugin)
{
GTypeInfo plugin_info = {
sizeof (GstXineAudioSinkClass),
NULL,
NULL,
gst_xine_audio_sink_subclass_init,
NULL,
NULL,
sizeof (GstXineAudioSink),
0,
gst_xine_audio_sink_sub_init,
};
plugin_node_t *node;
GstXineClass *klass;
klass = g_type_class_ref (GST_TYPE_XINE);
node = xine_list_first_content (klass->xine->plugin_catalog->aout);
while (node) {
gchar *plugin_name = g_strdup_printf ("xineaudiosink_%s", node->info->id);
gchar *type_name = g_strdup_printf ("GstXineAudioSink%s", node->info->id);
GType type;
plugin_info.class_data = node;
type =
g_type_register_static (GST_TYPE_XINE_AUDIO_SINK, type_name,
&plugin_info, 0);
g_free (type_name);
if (!gst_element_register (plugin, plugin_name, GST_RANK_MARGINAL, type)) {
g_free (plugin_name);
return FALSE;
}
g_free (plugin_name);
node = xine_list_next_content (klass->xine->plugin_catalog->aout);
}
g_type_class_unref (klass);
return TRUE;
}