gstreamer/sys/bluez/gsta2dpsink.c
Reynaldo H. Verdejo Pinochet 86ec812429 Remove unnecessary NULL checks before g_free()
g_free() is NULL-safe
2015-11-18 16:05:42 -08:00

716 lines
20 KiB
C

/*
*
* BlueZ - Bluetooth protocol stack for Linux
*
* Copyright (C) 2004-2010 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
*
*/
/* FIXME:
* - the segment_event caching and re-sending should not be needed any
* longer with sticky events
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#define GLIB_DISABLE_DEPRECATION_WARNINGS
#include <unistd.h>
#include "gsta2dpsink.h"
#include <gst/rtp/gstrtpbasepayload.h>
GST_DEBUG_CATEGORY_STATIC (gst_a2dp_sink_debug);
#define GST_CAT_DEFAULT gst_a2dp_sink_debug
#define A2DP_SBC_RTP_PAYLOAD_TYPE 1
#define DEFAULT_AUTOCONNECT TRUE
enum
{
PROP_0,
PROP_DEVICE,
PROP_AUTOCONNECT,
PROP_TRANSPORT
};
#define parent_class gst_a2dp_sink_parent_class
G_DEFINE_TYPE (GstA2dpSink, gst_a2dp_sink, GST_TYPE_BIN);
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 ], "
"channel-mode = (string) { mono, dual, stereo, joint }, "
"blocks = (int) { 4, 8, 12, 16 }, "
"subbands = (int) { 4, 8 }, "
"allocation-method = (string) { snr, loudness }, "
"bitpool = (int) [ 2, " TEMPLATE_MAX_BITPOOL_STR " ]; " "audio/mpeg"));
static gboolean gst_a2dp_sink_handle_event (GstPad * pad,
GstObject * pad_parent, GstEvent * event);
static gboolean gst_a2dp_sink_query (GstPad * pad, GstObject * parent,
GstQuery * query);
static GstCaps *gst_a2dp_sink_get_caps (GstA2dpSink * self);
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_clear (&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), &current, &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:
g_object_unref (G_OBJECT (element));
return NULL;
}
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));
g_free (self->device);
self->device = g_value_dup_string (value);
break;
case PROP_TRANSPORT:
if (self->sink != NULL)
gst_avdtp_sink_set_transport (self->sink, g_value_get_string (value));
g_free (self->transport);
self->transport = 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, *transport;
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;
case PROP_TRANSPORT:
if (self->sink != NULL) {
transport = gst_avdtp_sink_get_transport (self->sink);
if (transport != NULL)
g_value_take_string (value, transport);
}
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_new ("sink", capsfilter_pad);
g_object_unref (capsfilter_pad);
/* the getcaps of our ghostpad must reflect the device caps */
gst_pad_set_query_function (self->ghostpad, gst_a2dp_sink_query);
/* 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 (self->ghostpad);
gst_pad_set_event_function (self->ghostpad, gst_a2dp_sink_handle_event);
if (!gst_element_add_pad (GST_ELEMENT (self), 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_empty ();
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);
if (self->transport != NULL)
gst_avdtp_sink_set_transport (self->sink, self->transport);
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_unref (self->taglist);
self->taglist = NULL;
}
if (self->segment_event != NULL) {
gst_event_unref (self->segment_event);
self->segment_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));
g_object_class_install_property (object_class, PROP_TRANSPORT,
g_param_spec_string ("transport", "Transport",
"Use configured transport", NULL, G_PARAM_READWRITE));
gst_element_class_set_static_metadata (element_class, "Bluetooth A2DP sink",
"Sink/Audio", "Plays audio to an A2DP device",
"Marcel Holtmann <marcel@holtmann.org>");
GST_DEBUG_CATEGORY_INIT (gst_a2dp_sink_debug, "a2dpsink", 0,
"A2DP sink element");
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_a2dp_sink_factory));
}
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 (GstA2dpSink * self)
{
GstCaps *caps;
GstCaps *caps_aux;
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);
g_object_set (G_OBJECT (self->sink), "transport", self->transport, 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 = rtppay;
g_object_set (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 = 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 (GST_GHOST_PAD (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 (self->rtp, "mtu",
gst_avdtp_sink_get_link_mtu (self->sink), NULL);
#if 0
/* we forward our new segment here if we have one (FIXME: not needed any more) */
if (self->segment_event) {
gst_pad_send_event (GST_BASE_RTP_PAYLOAD_SINKPAD (self->rtp),
self->segment_event);
self->segment_event = NULL;
}
#endif
return TRUE;
}
/* 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, GstObject * pad_parent,
GstEvent * event)
{
GstA2dpSink *self;
GstTagList *taglist = NULL;
GstObject *parent;
self = GST_A2DP_SINK (pad_parent);
parent = gst_element_get_parent (GST_ELEMENT (self->sink));
if (GST_EVENT_TYPE (event) == GST_EVENT_SEGMENT &&
parent != GST_OBJECT_CAST (self)) {
if (self->segment_event != NULL)
gst_event_unref (self->segment_event);
self->segment_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);
}
} else if (GST_EVENT_TYPE (event) == GST_EVENT_CAPS &&
parent != GST_OBJECT_CAST (self)) {
GstCaps *caps = NULL;
/* FIXME: really check for parent != self above? */
/* now we know the caps */
gst_event_parse_caps (event, &caps);
gst_a2dp_sink_init_dynamic_elements (self, caps);
}
if (parent != NULL)
gst_object_unref (GST_OBJECT (parent));
return self->ghostpad_eventfunc (self->ghostpad, GST_OBJECT (self), event);
}
static gboolean
gst_a2dp_sink_query (GstPad * pad, GstObject * parent, GstQuery * query)
{
GstA2dpSink *sink = GST_A2DP_SINK (parent);
gboolean ret;
if (GST_QUERY_TYPE (query) == GST_QUERY_CAPS) {
GstCaps *caps;
caps = gst_a2dp_sink_get_caps (sink);
gst_query_set_caps_result (query, caps);
gst_caps_unref (caps);
ret = TRUE;
} else {
ret = sink->ghostpad_queryfunc (pad, parent, query);
}
return ret;
}
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)
{
self->sink = NULL;
self->fakesink = NULL;
self->rtp = NULL;
self->device = NULL;
self->transport = NULL;
self->autoconnect = DEFAULT_AUTOCONNECT;
self->capsfilter = NULL;
self->segment_event = NULL;
self->taglist = NULL;
self->ghostpad = NULL;
self->sink_is_in_bin = FALSE;
g_mutex_init (&self->cb_mutex);
/* 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);
}