From e7f2f450ff0ddf46d6a218f92d688cdbdbf6fb83 Mon Sep 17 00:00:00 2001
From: Dmitry Sharshakov <d3dx12.xx@gmail.com>
Date: Mon, 29 Mar 2021 19:30:36 +0300
Subject: [PATCH] bluez5: add parameter to use A2DP source as input

---
 spa/plugins/bluez5/a2dp-source.c              | 13 ++++++++++++-
 src/daemon/media-session.d/bluez-monitor.conf |  5 +++++
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/spa/plugins/bluez5/a2dp-source.c b/spa/plugins/bluez5/a2dp-source.c
index e9f553f3a..f57d3f376 100644
--- a/spa/plugins/bluez5/a2dp-source.c
+++ b/spa/plugins/bluez5/a2dp-source.c
@@ -129,6 +129,8 @@ struct impl {
 	struct timespec now;
 	uint64_t sample_count;
 	uint64_t skip_count;
+
+	bool is_input;
 };
 
 #define NAME "a2dp-source"
@@ -746,12 +748,14 @@ static int impl_node_send_command(void *object, const struct spa_command *comman
 static void emit_node_info(struct impl *this, bool full)
 {
 	char latency[64] = SPA_STRINGIFY(MIN_LATENCY)"/48000";
+
 	struct spa_dict_item node_info_items[] = {
 		{ SPA_KEY_DEVICE_API, "bluez5" },
-		{ SPA_KEY_MEDIA_CLASS, "Stream/Output/Audio" },
+		{ SPA_KEY_MEDIA_CLASS, this->is_input ? "Audio/Source" : "Stream/Output/Audio" },
 		{ SPA_KEY_NODE_LATENCY, latency },
 		{ "media.name", ((this->transport && this->transport->device->name) ?
 		                 this->transport->device->name : "A2DP") },
+                { SPA_KEY_NODE_DRIVER, this->is_input ? "true" : "false" },
 	};
 
 	if (full)
@@ -1321,6 +1325,13 @@ impl_init(const struct spa_handle_factory *factory,
 		this->codec_props = this->codec->init_props(this->codec,
 					this->transport->device->settings);
 
+
+	const char *a2dp_source_role = spa_dict_lookup(info, "bluez5.a2dp-source-role");
+	if (a2dp_source_role != NULL && !strcmp("input", a2dp_source_role))
+		this->is_input = true;
+	else
+		this->is_input = false;
+
 	return 0;
 }
 
diff --git a/src/daemon/media-session.d/bluez-monitor.conf b/src/daemon/media-session.d/bluez-monitor.conf
index c4a41445c..94e099a99 100644
--- a/src/daemon/media-session.d/bluez-monitor.conf
+++ b/src/daemon/media-session.d/bluez-monitor.conf
@@ -84,6 +84,11 @@ rules = [
                 #channelmix.normalize = false
                 #channelmix.mix-lfe   = false
                 #session.suspend-timeout-seconds = 5      # 0 disables suspend
+
+                # A2DP source role, "input" or "playback"
+                # Defaults to "playback", playing stream to speakers
+                # Set to "input" to use as an input for apps
+                #bluez5.a2dp-source-role = input
             }
         }
     }