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521 lines
14 KiB
C
521 lines
14 KiB
C
/*
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*
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* BlueZ - Bluetooth protocol stack for Linux
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*
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* Copyright (C) 2004-2010 Marcel Holtmann <marcel@holtmann.org>
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*
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <unistd.h>
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#include "gsta2dpsink.h"
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#include <gst/rtp/gstrtpbasepayload.h>
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GST_DEBUG_CATEGORY_STATIC (gst_a2dp_sink_debug);
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#define GST_CAT_DEFAULT gst_a2dp_sink_debug
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#define A2DP_SBC_RTP_PAYLOAD_TYPE 1
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#define DEFAULT_AUTOCONNECT TRUE
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enum
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{
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PROP_0,
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PROP_DEVICE,
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PROP_AUTOCONNECT,
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PROP_TRANSPORT
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};
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#define parent_class gst_a2dp_sink_parent_class
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G_DEFINE_TYPE (GstA2dpSink, gst_a2dp_sink, GST_TYPE_BIN);
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static GstStaticPadTemplate gst_a2dp_sink_factory =
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GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("audio/x-sbc, "
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"rate = (int) { 16000, 32000, 44100, 48000 }, "
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"channels = (int) [ 1, 2 ], "
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"channel-mode = (string) { mono, dual, stereo, joint }, "
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"blocks = (int) { 4, 8, 12, 16 }, "
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"subbands = (int) { 4, 8 }, "
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"allocation-method = (string) { snr, loudness }, "
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"bitpool = (int) [ 2, " TEMPLATE_MAX_BITPOOL_STR " ]; " "audio/mpeg"));
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static gboolean gst_a2dp_sink_handle_event (GstPad * pad,
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GstObject * pad_parent, GstEvent * event);
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static gboolean gst_a2dp_sink_query (GstPad * pad, GstObject * parent,
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GstQuery * query);
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static GstCaps *gst_a2dp_sink_get_caps (GstA2dpSink * self);
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/*
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* Helper function to create elements, add to the bin and link it
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* to another element.
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*/
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static GstElement *
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gst_a2dp_sink_init_element (GstA2dpSink * self, const gchar * elementname,
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const gchar * name)
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{
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GstElement *element;
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GstPad *sinkpad;
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GST_LOG_OBJECT (self, "Initializing %s", elementname);
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element = gst_element_factory_make (elementname, name);
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if (element == NULL) {
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GST_DEBUG_OBJECT (self, "Couldn't create %s", elementname);
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return NULL;
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}
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if (!gst_bin_add (GST_BIN (self), element)) {
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GST_DEBUG_OBJECT (self, "failed to add %s to the bin", elementname);
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goto cleanup_and_fail;
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}
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sinkpad = gst_element_get_static_pad (element, "sink");
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if (!gst_ghost_pad_set_target (GST_GHOST_PAD (self->ghostpad), sinkpad)) {
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GST_ERROR_OBJECT (self, "Failed to set target for ghost pad");
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goto remove_element_and_fail;
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}
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if (!gst_element_sync_state_with_parent (element)) {
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GST_DEBUG_OBJECT (self, "%s failed to go to playing", elementname);
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goto remove_element_and_fail;
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}
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return element;
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remove_element_and_fail:
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gst_element_set_state (element, GST_STATE_NULL);
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gst_bin_remove (GST_BIN (self), element);
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return NULL;
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cleanup_and_fail:
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g_object_unref (G_OBJECT (element));
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return NULL;
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}
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static void
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gst_a2dp_sink_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstA2dpSink *self = GST_A2DP_SINK (object);
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switch (prop_id) {
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case PROP_DEVICE:
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if (self->sink != NULL)
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gst_avdtp_sink_set_device (self->sink, g_value_get_string (value));
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g_free (self->device);
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self->device = g_value_dup_string (value);
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break;
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case PROP_TRANSPORT:
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if (self->sink != NULL)
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gst_avdtp_sink_set_transport (self->sink, g_value_get_string (value));
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g_free (self->transport);
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self->transport = g_value_dup_string (value);
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break;
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case PROP_AUTOCONNECT:
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self->autoconnect = g_value_get_boolean (value);
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if (self->sink != NULL)
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g_object_set (G_OBJECT (self->sink), "auto-connect",
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self->autoconnect, NULL);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gst_a2dp_sink_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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GstA2dpSink *self = GST_A2DP_SINK (object);
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gchar *device, *transport;
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switch (prop_id) {
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case PROP_DEVICE:
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if (self->sink != NULL) {
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device = gst_avdtp_sink_get_device (self->sink);
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if (device != NULL)
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g_value_take_string (value, device);
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}
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break;
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case PROP_AUTOCONNECT:
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if (self->sink != NULL)
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g_object_get (G_OBJECT (self->sink), "auto-connect",
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&self->autoconnect, NULL);
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g_value_set_boolean (value, self->autoconnect);
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break;
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case PROP_TRANSPORT:
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if (self->sink != NULL) {
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transport = gst_avdtp_sink_get_transport (self->sink);
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if (transport != NULL)
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g_value_take_string (value, transport);
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}
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static gboolean
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gst_a2dp_sink_init_ghost_pad (GstA2dpSink * self)
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{
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GstPadTemplate *templ;
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/* now we add a ghostpad */
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templ = gst_static_pad_template_get (&gst_a2dp_sink_factory);
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self->ghostpad = gst_ghost_pad_new_no_target_from_template ("sink", templ);
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g_object_unref (templ);
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/* the getcaps of our ghostpad must reflect the device caps */
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gst_pad_set_query_function (self->ghostpad, gst_a2dp_sink_query);
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gst_pad_set_event_function (self->ghostpad, gst_a2dp_sink_handle_event);
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if (!gst_element_add_pad (GST_ELEMENT (self), self->ghostpad))
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GST_ERROR_OBJECT (self, "failed to add ghostpad");
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return TRUE;
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}
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static void
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gst_a2dp_sink_remove_dynamic_elements (GstA2dpSink * self)
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{
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if (self->rtp) {
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GST_LOG_OBJECT (self, "removing rtp element from the bin");
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if (!gst_bin_remove (GST_BIN (self), GST_ELEMENT (self->rtp)))
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GST_WARNING_OBJECT (self, "failed to remove rtp " "element from bin");
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else
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self->rtp = NULL;
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}
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}
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static GstStateChangeReturn
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gst_a2dp_sink_change_state (GstElement * element, GstStateChange transition)
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{
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GstStateChangeReturn ret;
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GstA2dpSink *self = GST_A2DP_SINK (element);
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switch (transition) {
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case GST_STATE_CHANGE_READY_TO_PAUSED:
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self->taglist = gst_tag_list_new_empty ();
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break;
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case GST_STATE_CHANGE_NULL_TO_READY:
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if (self->device != NULL)
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gst_avdtp_sink_set_device (self->sink, self->device);
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if (self->transport != NULL)
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gst_avdtp_sink_set_transport (self->sink, self->transport);
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g_object_set (G_OBJECT (self->sink), "auto-connect",
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self->autoconnect, NULL);
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break;
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default:
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break;
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}
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ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
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switch (transition) {
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case GST_STATE_CHANGE_PAUSED_TO_READY:
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if (self->taglist) {
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gst_tag_list_unref (self->taglist);
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self->taglist = NULL;
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}
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break;
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case GST_STATE_CHANGE_READY_TO_NULL:
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gst_a2dp_sink_remove_dynamic_elements (self);
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break;
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default:
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break;
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}
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return ret;
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}
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static void
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gst_a2dp_sink_class_init (GstA2dpSinkClass * klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
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parent_class = g_type_class_peek_parent (klass);
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object_class->set_property = GST_DEBUG_FUNCPTR (gst_a2dp_sink_set_property);
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object_class->get_property = GST_DEBUG_FUNCPTR (gst_a2dp_sink_get_property);
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element_class->change_state = GST_DEBUG_FUNCPTR (gst_a2dp_sink_change_state);
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g_object_class_install_property (object_class, PROP_DEVICE,
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g_param_spec_string ("device", "Device",
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"Bluetooth remote device address", NULL, G_PARAM_READWRITE));
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g_object_class_install_property (object_class, PROP_AUTOCONNECT,
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g_param_spec_boolean ("auto-connect", "Auto-connect",
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"Automatically attempt to connect to device",
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DEFAULT_AUTOCONNECT, G_PARAM_READWRITE));
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g_object_class_install_property (object_class, PROP_TRANSPORT,
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g_param_spec_string ("transport", "Transport",
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"Use configured transport", NULL, G_PARAM_READWRITE));
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gst_element_class_set_static_metadata (element_class, "Bluetooth A2DP sink",
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"Sink/Audio", "Plays audio to an A2DP device",
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"Marcel Holtmann <marcel@holtmann.org>");
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GST_DEBUG_CATEGORY_INIT (gst_a2dp_sink_debug, "a2dpsink", 0,
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"A2DP sink element");
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gst_element_class_add_static_pad_template (element_class,
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&gst_a2dp_sink_factory);
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}
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GstCaps *
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gst_a2dp_sink_get_device_caps (GstA2dpSink * self)
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{
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return gst_avdtp_sink_get_device_caps (self->sink);
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}
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static GstCaps *
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gst_a2dp_sink_get_caps (GstA2dpSink * self)
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{
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GstCaps *caps = NULL;
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if (self->sink != NULL) {
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GST_LOG_OBJECT (self, "Getting device caps");
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caps = gst_a2dp_sink_get_device_caps (self);
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}
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if (!caps)
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caps = gst_static_pad_template_get_caps (&gst_a2dp_sink_factory);
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return caps;
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}
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static gboolean
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gst_a2dp_sink_init_avdtp_sink (GstA2dpSink * self)
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{
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GstElement *sink;
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if (self->sink == NULL)
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sink = gst_element_factory_make ("avdtpsink", "avdtpsink");
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else
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sink = GST_ELEMENT (self->sink);
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if (sink == NULL) {
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GST_ERROR_OBJECT (self, "Couldn't create avdtpsink");
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return FALSE;
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}
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if (!gst_bin_add (GST_BIN (self), sink)) {
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GST_ERROR_OBJECT (self, "failed to add avdtpsink " "to the bin");
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goto cleanup_and_fail;
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}
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self->sink = GST_AVDTP_SINK (sink);
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g_object_set (G_OBJECT (self->sink), "device", self->device, NULL);
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g_object_set (G_OBJECT (self->sink), "transport", self->transport, NULL);
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gst_element_sync_state_with_parent (sink);
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return TRUE;
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cleanup_and_fail:
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if (sink != NULL)
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g_object_unref (G_OBJECT (sink));
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return FALSE;
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}
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static gboolean
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gst_a2dp_sink_init_rtp_sbc_element (GstA2dpSink * self)
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{
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GstElement *rtppay;
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/* if we already have a rtp, we don't need a new one */
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if (self->rtp != NULL)
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return TRUE;
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rtppay = gst_a2dp_sink_init_element (self, "rtpsbcpay", "rtp");
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if (rtppay == NULL)
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return FALSE;
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self->rtp = rtppay;
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g_object_set (self->rtp, "min-frames", -1, NULL);
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gst_element_set_state (rtppay, GST_STATE_PAUSED);
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return TRUE;
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}
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static gboolean
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gst_a2dp_sink_init_rtp_mpeg_element (GstA2dpSink * self)
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{
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GstElement *rtppay;
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/* check if we don't need a new rtp */
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if (self->rtp)
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return TRUE;
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GST_LOG_OBJECT (self, "Initializing rtp mpeg element");
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rtppay = gst_a2dp_sink_init_element (self, "rtpmpapay", "rtp");
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if (rtppay == NULL)
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return FALSE;
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self->rtp = rtppay;
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gst_element_set_state (rtppay, GST_STATE_PAUSED);
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return TRUE;
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}
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static gboolean
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gst_a2dp_sink_init_dynamic_elements (GstA2dpSink * self, GstCaps * caps)
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{
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GstStructure *structure;
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GstEvent *event;
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gboolean crc;
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gchar *mode = NULL;
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structure = gst_caps_get_structure (caps, 0);
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/* first, we need to create our rtp payloader */
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if (gst_structure_has_name (structure, "audio/x-sbc")) {
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GST_LOG_OBJECT (self, "sbc media received");
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if (!gst_a2dp_sink_init_rtp_sbc_element (self))
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return FALSE;
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} else if (gst_structure_has_name (structure, "audio/mpeg")) {
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GST_LOG_OBJECT (self, "mp3 media received");
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if (!gst_a2dp_sink_init_rtp_mpeg_element (self))
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return FALSE;
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} else {
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GST_ERROR_OBJECT (self, "Unexpected media type");
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return FALSE;
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}
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if (!gst_element_link (GST_ELEMENT (self->rtp), GST_ELEMENT (self->sink))) {
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GST_ERROR_OBJECT (self, "couldn't link rtpsbcpay " "to avdtpsink");
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return FALSE;
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}
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/* check if we should push the taglist FIXME should we push this?
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* we can send the tags directly if needed */
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if (self->taglist != NULL && gst_structure_has_name (structure, "audio/mpeg")) {
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event = gst_event_new_tag (self->taglist);
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/* send directly the crc */
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if (gst_tag_list_get_boolean (self->taglist, "has-crc", &crc))
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gst_avdtp_sink_set_crc (self->sink, crc);
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if (gst_tag_list_get_string (self->taglist, "channel-mode", &mode))
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gst_avdtp_sink_set_channel_mode (self->sink, mode);
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gst_pad_send_event (self->ghostpad, event);
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self->taglist = NULL;
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g_free (mode);
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}
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g_object_set (self->rtp, "mtu",
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gst_avdtp_sink_get_link_mtu (self->sink), NULL);
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return TRUE;
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}
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static gboolean
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gst_a2dp_sink_handle_event (GstPad * pad, GstObject * pad_parent,
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GstEvent * event)
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{
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GstA2dpSink *self;
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GstTagList *taglist = NULL;
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self = GST_A2DP_SINK (pad_parent);
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if (GST_EVENT_TYPE (event) == GST_EVENT_TAG) {
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if (self->taglist == NULL)
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gst_event_parse_tag (event, &self->taglist);
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else {
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gst_event_parse_tag (event, &taglist);
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gst_tag_list_insert (self->taglist, taglist, GST_TAG_MERGE_REPLACE);
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}
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} else if (GST_EVENT_TYPE (event) == GST_EVENT_CAPS) {
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GstCaps *caps = NULL;
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gst_event_parse_caps (event, &caps);
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gst_a2dp_sink_init_dynamic_elements (self, caps);
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}
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return gst_pad_event_default (pad, pad_parent, event);
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}
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static gboolean
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gst_a2dp_sink_query (GstPad * pad, GstObject * parent, GstQuery * query)
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{
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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 = gst_pad_query_default (pad, parent, query);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void
|
|
gst_a2dp_sink_init (GstA2dpSink * self)
|
|
{
|
|
self->sink = NULL;
|
|
self->rtp = NULL;
|
|
self->device = NULL;
|
|
self->transport = NULL;
|
|
self->autoconnect = DEFAULT_AUTOCONNECT;
|
|
self->taglist = NULL;
|
|
self->ghostpad = NULL;
|
|
|
|
gst_a2dp_sink_init_ghost_pad (self);
|
|
|
|
gst_a2dp_sink_init_avdtp_sink (self);
|
|
}
|