/*
*
* BlueZ - Bluetooth protocol stack for Linux
*
* Copyright (C) 2004-2009 Marcel Holtmann <marcel@holtmann.org>
*
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <unistd.h>
#include <pthread.h>
#include "gsta2dpsink.h"
GType gst_avdtp_sink_get_type(void);
GST_DEBUG_CATEGORY_STATIC(gst_a2dp_sink_debug);
#define GST_CAT_DEFAULT gst_a2dp_sink_debug
#define A2DP_SBC_RTP_PAYLOAD_TYPE 1
#define TEMPLATE_MAX_BITPOOL_STR "64"
#define DEFAULT_AUTOCONNECT TRUE
enum {
PROP_0,
PROP_DEVICE,
PROP_AUTOCONNECT
};
GST_BOILERPLATE(GstA2dpSink, gst_a2dp_sink, GstBin, GST_TYPE_BIN);
static const GstElementDetails gst_a2dp_sink_details =
GST_ELEMENT_DETAILS("Bluetooth A2DP sink",
"Sink/Audio",
"Plays audio to an A2DP device",
"Marcel Holtmann <marcel@holtmann.org>");
static GstStaticPadTemplate gst_a2dp_sink_factory =
GST_STATIC_PAD_TEMPLATE("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
GST_STATIC_CAPS("audio/x-sbc, "
"rate = (int) { 16000, 32000, 44100, 48000 }, "
"channels = (int) [ 1, 2 ], "
"mode = (string) { \"mono\", \"dual\", \"stereo\", \"joint\" }, "
"blocks = (int) { 4, 8, 12, 16 }, "
"subbands = (int) { 4, 8 }, "
"allocation = (string) { \"snr\", \"loudness\" }, "
"bitpool = (int) [ 2, "
TEMPLATE_MAX_BITPOOL_STR " ]; "
"audio/mpeg"
));
static gboolean gst_a2dp_sink_handle_event(GstPad *pad, GstEvent *event);
static gboolean gst_a2dp_sink_set_caps(GstPad *pad, GstCaps *caps);
static GstCaps *gst_a2dp_sink_get_caps(GstPad *pad);
static gboolean gst_a2dp_sink_init_caps_filter(GstA2dpSink *self);
static gboolean gst_a2dp_sink_init_fakesink(GstA2dpSink *self);
static gboolean gst_a2dp_sink_remove_fakesink(GstA2dpSink *self);
static void gst_a2dp_sink_finalize(GObject *obj)
{
GstA2dpSink *self = GST_A2DP_SINK(obj);
g_mutex_free(self->cb_mutex);
G_OBJECT_CLASS(parent_class)->finalize(obj);
}
static GstState gst_a2dp_sink_get_state(GstA2dpSink *self)
{
GstState current, pending;
gst_element_get_state(GST_ELEMENT(self), ¤t, &pending, 0);
if (pending == GST_STATE_VOID_PENDING)
return current;
return pending;
}
/*
* Helper function to create elements, add to the bin and link it
* to another element.
*/
static GstElement *gst_a2dp_sink_init_element(GstA2dpSink *self,
const gchar *elementname, const gchar *name,
GstElement *link_to)
{
GstElement *element;
GstState state;
GST_LOG_OBJECT(self, "Initializing %s", elementname);
element = gst_element_factory_make(elementname, name);
if (element == NULL) {
GST_DEBUG_OBJECT(self, "Couldn't create %s", elementname);
return NULL;
}
if (!gst_bin_add(GST_BIN(self), element)) {
GST_DEBUG_OBJECT(self, "failed to add %s to the bin",
elementname);
goto cleanup_and_fail;
}
state = gst_a2dp_sink_get_state(self);
if (gst_element_set_state(element, state) ==
GST_STATE_CHANGE_FAILURE) {
GST_DEBUG_OBJECT(self, "%s failed to go to playing",
elementname);
goto remove_element_and_fail;
}
if (link_to != NULL)
if (!gst_element_link(link_to, element)) {
GST_DEBUG_OBJECT(self, "couldn't link %s",
elementname);
goto remove_element_and_fail;
}
return element;
remove_element_and_fail:
gst_element_set_state(element, GST_STATE_NULL);
gst_bin_remove(GST_BIN(self), element);
return NULL;
cleanup_and_fail:
if (element != NULL)
g_object_unref(G_OBJECT(element));
return NULL;
}
static void gst_a2dp_sink_base_init(gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS(g_class);
gst_element_class_set_details(element_class,
&gst_a2dp_sink_details);
gst_element_class_add_pad_template(element_class,
gst_static_pad_template_get(&gst_a2dp_sink_factory));
}
static void gst_a2dp_sink_set_property(GObject *object, guint prop_id,
const GValue *value, GParamSpec *pspec)
{
GstA2dpSink *self = GST_A2DP_SINK(object);
switch (prop_id) {
case PROP_DEVICE:
if (self->sink != NULL)
gst_avdtp_sink_set_device(self->sink,
g_value_get_string(value));
if (self->device != NULL)
g_free(self->device);
self->device = g_value_dup_string(value);
break;
case PROP_AUTOCONNECT:
self->autoconnect = g_value_get_boolean(value);
if (self->sink != NULL)
g_object_set(G_OBJECT(self->sink), "auto-connect",
self->autoconnect, NULL);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
break;
}
}
static void gst_a2dp_sink_get_property(GObject *object, guint prop_id,
GValue *value, GParamSpec *pspec)
{
GstA2dpSink *self = GST_A2DP_SINK(object);
gchar *device;
switch (prop_id) {
case PROP_DEVICE:
if (self->sink != NULL) {
device = gst_avdtp_sink_get_device(self->sink);
if (device != NULL)
g_value_take_string(value, device);
}
break;
case PROP_AUTOCONNECT:
if (self->sink != NULL)
g_object_get(G_OBJECT(self->sink), "auto-connect",
&self->autoconnect, NULL);
g_value_set_boolean(value, self->autoconnect);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
break;
}
}
static gboolean gst_a2dp_sink_init_ghost_pad(GstA2dpSink *self)
{
GstPad *capsfilter_pad;
/* we search for the capsfilter sinkpad */
capsfilter_pad = gst_element_get_static_pad(self->capsfilter, "sink");
/* now we add a ghostpad */
self->ghostpad = GST_GHOST_PAD(gst_ghost_pad_new("sink",
capsfilter_pad));
g_object_unref(capsfilter_pad);
/* the getcaps of our ghostpad must reflect the device caps */
gst_pad_set_getcaps_function(GST_PAD(self->ghostpad),
gst_a2dp_sink_get_caps);
self->ghostpad_setcapsfunc = GST_PAD_SETCAPSFUNC(self->ghostpad);
gst_pad_set_setcaps_function(GST_PAD(self->ghostpad),
GST_DEBUG_FUNCPTR(gst_a2dp_sink_set_caps));
/* we need to handle events on our own and we also need the eventfunc
* of the ghostpad for forwarding calls */
self->ghostpad_eventfunc = GST_PAD_EVENTFUNC(GST_PAD(self->ghostpad));
gst_pad_set_event_function(GST_PAD(self->ghostpad),
gst_a2dp_sink_handle_event);
if (!gst_element_add_pad(GST_ELEMENT(self), GST_PAD(self->ghostpad)))
GST_ERROR_OBJECT(self, "failed to add ghostpad");
return TRUE;
}
static void gst_a2dp_sink_remove_dynamic_elements(GstA2dpSink *self)
{
if (self->rtp) {
GST_LOG_OBJECT(self, "removing rtp element from the bin");
if (!gst_bin_remove(GST_BIN(self), GST_ELEMENT(self->rtp)))
GST_WARNING_OBJECT(self, "failed to remove rtp "
"element from bin");
else
self->rtp = NULL;
}
}
static GstStateChangeReturn gst_a2dp_sink_change_state(GstElement *element,
GstStateChange transition)
{
GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
GstA2dpSink *self = GST_A2DP_SINK(element);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
self->taglist = gst_tag_list_new();
gst_a2dp_sink_init_fakesink(self);
break;
case GST_STATE_CHANGE_NULL_TO_READY:
self->sink_is_in_bin = FALSE;
self->sink = GST_AVDTP_SINK(gst_element_factory_make(
"avdtpsink", "avdtpsink"));
if (self->sink == NULL) {
GST_WARNING_OBJECT(self, "failed to create avdtpsink");
return GST_STATE_CHANGE_FAILURE;
}
if (self->device != NULL)
gst_avdtp_sink_set_device(self->sink,
self->device);
g_object_set(G_OBJECT(self->sink), "auto-connect",
self->autoconnect, NULL);
ret = gst_element_set_state(GST_ELEMENT(self->sink),
GST_STATE_READY);
break;
default:
break;
}
if (ret == GST_STATE_CHANGE_FAILURE)
return ret;
ret = GST_ELEMENT_CLASS(parent_class)->change_state(element,
transition);
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
if (self->taglist) {
gst_tag_list_free(self->taglist);
self->taglist = NULL;
}
if (self->newseg_event != NULL) {
gst_event_unref(self->newseg_event);
self->newseg_event = NULL;
}
gst_a2dp_sink_remove_fakesink(self);
break;
case GST_STATE_CHANGE_READY_TO_NULL:
if (self->sink_is_in_bin) {
if (!gst_bin_remove(GST_BIN(self),
GST_ELEMENT(self->sink)))
GST_WARNING_OBJECT(self, "Failed to remove "
"avdtpsink from bin");
} else if (self->sink != NULL) {
gst_element_set_state(GST_ELEMENT(self->sink),
GST_STATE_NULL);
g_object_unref(G_OBJECT(self->sink));
}
self->sink = NULL;
gst_a2dp_sink_remove_dynamic_elements(self);
break;
default:
break;
}
return ret;
}
static void gst_a2dp_sink_class_init(GstA2dpSinkClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS(klass);
GstElementClass *element_class = GST_ELEMENT_CLASS(klass);
parent_class = g_type_class_peek_parent(klass);
object_class->set_property = GST_DEBUG_FUNCPTR(
gst_a2dp_sink_set_property);
object_class->get_property = GST_DEBUG_FUNCPTR(
gst_a2dp_sink_get_property);
object_class->finalize = GST_DEBUG_FUNCPTR(
gst_a2dp_sink_finalize);
element_class->change_state = GST_DEBUG_FUNCPTR(
gst_a2dp_sink_change_state);
g_object_class_install_property(object_class, PROP_DEVICE,
g_param_spec_string("device", "Device",
"Bluetooth remote device address",
NULL, G_PARAM_READWRITE));
g_object_class_install_property(object_class, PROP_AUTOCONNECT,
g_param_spec_boolean("auto-connect", "Auto-connect",
"Automatically attempt to connect to device",
DEFAULT_AUTOCONNECT, G_PARAM_READWRITE));
GST_DEBUG_CATEGORY_INIT(gst_a2dp_sink_debug, "a2dpsink", 0,
"A2DP sink element");
}
GstCaps *gst_a2dp_sink_get_device_caps(GstA2dpSink *self)
{
return gst_avdtp_sink_get_device_caps(self->sink);
}
static GstCaps *gst_a2dp_sink_get_caps(GstPad *pad)
{
GstCaps *caps;
GstCaps *caps_aux;
GstA2dpSink *self = GST_A2DP_SINK(GST_PAD_PARENT(pad));
if (self->sink == NULL) {
GST_DEBUG_OBJECT(self, "a2dpsink isn't initialized "
"returning template caps");
caps = gst_static_pad_template_get_caps(
&gst_a2dp_sink_factory);
} else {
GST_LOG_OBJECT(self, "Getting device caps");
caps = gst_a2dp_sink_get_device_caps(self);
if (caps == NULL)
caps = gst_static_pad_template_get_caps(
&gst_a2dp_sink_factory);
}
caps_aux = gst_caps_copy(caps);
g_object_set(self->capsfilter, "caps", caps_aux, NULL);
gst_caps_unref(caps_aux);
return caps;
}
static gboolean gst_a2dp_sink_init_avdtp_sink(GstA2dpSink *self)
{
GstElement *sink;
/* check if we don't need a new sink */
if (self->sink_is_in_bin)
return TRUE;
if (self->sink == NULL)
sink = gst_element_factory_make("avdtpsink", "avdtpsink");
else
sink = GST_ELEMENT(self->sink);
if (sink == NULL) {
GST_ERROR_OBJECT(self, "Couldn't create avdtpsink");
return FALSE;
}
if (!gst_bin_add(GST_BIN(self), sink)) {
GST_ERROR_OBJECT(self, "failed to add avdtpsink "
"to the bin");
goto cleanup_and_fail;
}
if (gst_element_set_state(sink, GST_STATE_READY) ==
GST_STATE_CHANGE_FAILURE) {
GST_ERROR_OBJECT(self, "avdtpsink failed to go to ready");
goto remove_element_and_fail;
}
if (!gst_element_link(GST_ELEMENT(self->rtp), sink)) {
GST_ERROR_OBJECT(self, "couldn't link rtpsbcpay "
"to avdtpsink");
goto remove_element_and_fail;
}
self->sink = GST_AVDTP_SINK(sink);
self->sink_is_in_bin = TRUE;
g_object_set(G_OBJECT(self->sink), "device", self->device, NULL);
gst_element_set_state(sink, GST_STATE_PAUSED);
return TRUE;
remove_element_and_fail:
gst_element_set_state(sink, GST_STATE_NULL);
gst_bin_remove(GST_BIN(self), sink);
return FALSE;
cleanup_and_fail:
if (sink != NULL)
g_object_unref(G_OBJECT(sink));
return FALSE;
}
static gboolean gst_a2dp_sink_init_rtp_sbc_element(GstA2dpSink *self)
{
GstElement *rtppay;
/* if we already have a rtp, we don't need a new one */
if (self->rtp != NULL)
return TRUE;
rtppay = gst_a2dp_sink_init_element(self, "rtpsbcpay", "rtp",
self->capsfilter);
if (rtppay == NULL)
return FALSE;
self->rtp = GST_BASE_RTP_PAYLOAD(rtppay);
g_object_set(G_OBJECT(self->rtp), "min-frames", -1, NULL);
gst_element_set_state(rtppay, GST_STATE_PAUSED);
return TRUE;
}
static gboolean gst_a2dp_sink_init_rtp_mpeg_element(GstA2dpSink *self)
{
GstElement *rtppay;
/* check if we don't need a new rtp */
if (self->rtp)
return TRUE;
GST_LOG_OBJECT(self, "Initializing rtp mpeg element");
/* if capsfilter is not created then we can't have our rtp element */
if (self->capsfilter == NULL)
return FALSE;
rtppay = gst_a2dp_sink_init_element(self, "rtpmpapay", "rtp",
self->capsfilter);
if (rtppay == NULL)
return FALSE;
self->rtp = GST_BASE_RTP_PAYLOAD(rtppay);
gst_element_set_state(rtppay, GST_STATE_PAUSED);
return TRUE;
}
static gboolean gst_a2dp_sink_init_dynamic_elements(GstA2dpSink *self,
GstCaps *caps)
{
GstStructure *structure;
GstEvent *event;
GstPad *capsfilterpad;
gboolean crc;
gchar *mode = NULL;
structure = gst_caps_get_structure(caps, 0);
/* before everything we need to remove fakesink */
gst_a2dp_sink_remove_fakesink(self);
/* first, we need to create our rtp payloader */
if (gst_structure_has_name(structure, "audio/x-sbc")) {
GST_LOG_OBJECT(self, "sbc media received");
if (!gst_a2dp_sink_init_rtp_sbc_element(self))
return FALSE;
} else if (gst_structure_has_name(structure, "audio/mpeg")) {
GST_LOG_OBJECT(self, "mp3 media received");
if (!gst_a2dp_sink_init_rtp_mpeg_element(self))
return FALSE;
} else {
GST_ERROR_OBJECT(self, "Unexpected media type");
return FALSE;
}
if (!gst_a2dp_sink_init_avdtp_sink(self))
return FALSE;
/* check if we should push the taglist FIXME should we push this?
* we can send the tags directly if needed */
if (self->taglist != NULL &&
gst_structure_has_name(structure, "audio/mpeg")) {
event = gst_event_new_tag(self->taglist);
/* send directly the crc */
if (gst_tag_list_get_boolean(self->taglist, "has-crc", &crc))
gst_avdtp_sink_set_crc(self->sink, crc);
if (gst_tag_list_get_string(self->taglist, "channel-mode",
&mode))
gst_avdtp_sink_set_channel_mode(self->sink, mode);
capsfilterpad = gst_ghost_pad_get_target(self->ghostpad);
gst_pad_send_event(capsfilterpad, event);
self->taglist = NULL;
g_free(mode);
}
if (!gst_avdtp_sink_set_device_caps(self->sink, caps))
return FALSE;
g_object_set(G_OBJECT(self->rtp), "mtu",
gst_avdtp_sink_get_link_mtu(self->sink), NULL);
/* we forward our new segment here if we have one */
if (self->newseg_event) {
gst_pad_send_event(GST_BASE_RTP_PAYLOAD_SINKPAD(self->rtp),
self->newseg_event);
self->newseg_event = NULL;
}
return TRUE;
}
static gboolean gst_a2dp_sink_set_caps(GstPad *pad, GstCaps *caps)
{
GstA2dpSink *self;
self = GST_A2DP_SINK(GST_PAD_PARENT(pad));
GST_INFO_OBJECT(self, "setting caps");
/* now we know the caps */
gst_a2dp_sink_init_dynamic_elements(self, caps);
return self->ghostpad_setcapsfunc(GST_PAD(self->ghostpad), caps);
}
/* used for catching newsegment events while we don't have a sink, for
* later forwarding it to the sink */
static gboolean gst_a2dp_sink_handle_event(GstPad *pad, GstEvent *event)
{
GstA2dpSink *self;
GstTagList *taglist = NULL;
GstObject *parent;
self = GST_A2DP_SINK(GST_PAD_PARENT(pad));
parent = gst_element_get_parent(GST_ELEMENT(self->sink));
if (GST_EVENT_TYPE(event) == GST_EVENT_NEWSEGMENT &&
parent != GST_OBJECT_CAST(self)) {
if (self->newseg_event != NULL)
gst_event_unref(self->newseg_event);
self->newseg_event = gst_event_ref(event);
} else if (GST_EVENT_TYPE(event) == GST_EVENT_TAG &&
parent != GST_OBJECT_CAST(self)) {
if (self->taglist == NULL)
gst_event_parse_tag(event, &self->taglist);
else {
gst_event_parse_tag(event, &taglist);
gst_tag_list_insert(self->taglist, taglist,
GST_TAG_MERGE_REPLACE);
}
}
if (parent != NULL)
gst_object_unref(GST_OBJECT(parent));
return self->ghostpad_eventfunc(GST_PAD(self->ghostpad), event);
}
static gboolean gst_a2dp_sink_init_caps_filter(GstA2dpSink *self)
{
GstElement *element;
element = gst_element_factory_make("capsfilter", "filter");
if (element == NULL)
goto failed;
if (!gst_bin_add(GST_BIN(self), element))
goto failed;
self->capsfilter = element;
return TRUE;
failed:
GST_ERROR_OBJECT(self, "Failed to initialize caps filter");
return FALSE;
}
static gboolean gst_a2dp_sink_init_fakesink(GstA2dpSink *self)
{
if (self->fakesink != NULL)
return TRUE;
g_mutex_lock(self->cb_mutex);
self->fakesink = gst_a2dp_sink_init_element(self, "fakesink",
"fakesink", self->capsfilter);
g_mutex_unlock(self->cb_mutex);
if (!self->fakesink)
return FALSE;
return TRUE;
}
static gboolean gst_a2dp_sink_remove_fakesink(GstA2dpSink *self)
{
g_mutex_lock(self->cb_mutex);
if (self->fakesink != NULL) {
gst_element_set_locked_state(self->fakesink, TRUE);
gst_element_set_state(self->fakesink, GST_STATE_NULL);
gst_bin_remove(GST_BIN(self), self->fakesink);
self->fakesink = NULL;
}
g_mutex_unlock(self->cb_mutex);
return TRUE;
}
static void gst_a2dp_sink_init(GstA2dpSink *self,
GstA2dpSinkClass *klass)
{
self->sink = NULL;
self->fakesink = NULL;
self->rtp = NULL;
self->device = NULL;
self->autoconnect = DEFAULT_AUTOCONNECT;
self->capsfilter = NULL;
self->newseg_event = NULL;
self->taglist = NULL;
self->ghostpad = NULL;
self->sink_is_in_bin = FALSE;
self->cb_mutex = g_mutex_new();
/* we initialize our capsfilter */
gst_a2dp_sink_init_caps_filter(self);
g_object_set(self->capsfilter, "caps",
gst_static_pad_template_get_caps(&gst_a2dp_sink_factory),
NULL);
gst_a2dp_sink_init_fakesink(self);
gst_a2dp_sink_init_ghost_pad(self);
}
gboolean gst_a2dp_sink_plugin_init(GstPlugin *plugin)
{
return gst_element_register(plugin, "a2dpsink",
GST_RANK_MARGINAL, GST_TYPE_A2DP_SINK);
}