bluez5: Rename codec API from *a2dp* to *media*

The BlueZ Media1 interface will not only be used for A2DP but also for
LE Audio and code related can be shared.

spa/plugins/bluez5/media-codecs.c

@@ -0,0 +1,209 @@
+/*
+ * BlueALSA - bluez-a2dp.c
+ * Copyright (c) 2016-2017 Arkadiusz Bokowy
+ *
+ * This file is a part of bluez-alsa.
+ *
+ * This project is licensed under the terms of the MIT license.
+ *
+ */
+
+#include <spa/utils/string.h>
+
+#include "media-codecs.h"
+
+int media_codec_select_config(const struct media_codec_config configs[], size_t n,
+			     uint32_t cap, int preferred_value)
+{
+	size_t i;
+	int *scores, res;
+	unsigned int max_priority;
+
+	if (n == 0)
+		return -EINVAL;
+
+	scores = calloc(n, sizeof(int));
+	if (scores == NULL)
+		return -errno;
+
+	max_priority = configs[0].priority;
+	for (i = 1; i < n; ++i) {
+		if (configs[i].priority > max_priority)
+			max_priority = configs[i].priority;
+	}
+
+	for (i = 0; i < n; ++i) {
+		if (!(configs[i].config & cap)) {
+			scores[i] = -1;
+			continue;
+		}
+		if (configs[i].value == preferred_value)
+			scores[i] = 100 * (max_priority + 1);
+		else if (configs[i].value > preferred_value)
+			scores[i] = 10 * (max_priority + 1);
+		else
+			scores[i] = 1;
+
+		scores[i] *= configs[i].priority + 1;
+	}
+
+	res = 0;
+	for (i = 1; i < n; ++i) {
+		if (scores[i] > scores[res])
+			res = i;
+	}
+
+	if (scores[res] < 0)
+		res = -EINVAL;
+
+	free(scores);
+	return res;
+}
+
+bool media_codec_check_caps(const struct media_codec *codec, unsigned int codec_id,
+			   const void *caps, size_t caps_size,
+			   const struct media_codec_audio_info *info,
+			   const struct spa_dict *global_settings)
+{
+	uint8_t config[A2DP_MAX_CAPS_SIZE];
+	int res;
+
+	if (codec_id != codec->codec_id)
+		return false;
+
+	if (caps == NULL)
+		return false;
+
+	res = codec->select_config(codec, 0, caps, caps_size, info, global_settings, config);
+	if (res < 0)
+		return false;
+
+	return ((size_t)res == caps_size);
+}
+
+#ifdef CODEC_PLUGIN
+
+struct impl {
+	struct spa_handle handle;
+	struct spa_bluez5_codec_a2dp bluez5_codec_a2dp;
+};
+
+static int
+impl_get_interface(struct spa_handle *handle, const char *type, void **interface)
+{
+	struct impl *this;
+
+	spa_return_val_if_fail(handle != NULL, -EINVAL);
+	spa_return_val_if_fail(interface != NULL, -EINVAL);
+
+	this = (struct impl *) handle;
+
+	if (spa_streq(type, SPA_TYPE_INTERFACE_Bluez5CodecMedia))
+		*interface = &this->bluez5_codec_a2dp;
+	else
+		return -ENOENT;
+
+	return 0;
+}
+
+static int
+impl_clear(struct spa_handle *handle)
+{
+	spa_return_val_if_fail(handle != NULL, -EINVAL);
+	return 0;
+}
+
+static size_t
+impl_get_size(const struct spa_handle_factory *factory, const struct spa_dict *params)
+{
+	return sizeof(struct impl);
+}
+
+static int
+impl_init(const struct spa_handle_factory *factory,
+		struct spa_handle *handle,
+		const struct spa_dict *info,
+		const struct spa_support *support,
+		uint32_t n_support)
+{
+	struct impl *this;
+
+	spa_return_val_if_fail(factory != NULL, -EINVAL);
+	spa_return_val_if_fail(handle != NULL, -EINVAL);
+
+	handle->get_interface = impl_get_interface;
+	handle->clear = impl_clear;
+
+	this = (struct impl *) handle;
+
+	this->bluez5_codec_a2dp.codecs = codec_plugin_media_codecs;
+	this->bluez5_codec_a2dp.iface = SPA_INTERFACE_INIT(
+		SPA_TYPE_INTERFACE_Bluez5CodecMedia,
+		SPA_VERSION_BLUEZ5_CODEC_MEDIA,
+		NULL,
+		this);
+
+	return 0;
+}
+
+static const struct spa_interface_info impl_interfaces[] = {
+        {SPA_TYPE_INTERFACE_Bluez5CodecMedia,},
+};
+
+static int
+impl_enum_interface_info(const struct spa_handle_factory *factory,
+			 const struct spa_interface_info **info,
+			 uint32_t *index)
+{
+	spa_return_val_if_fail(factory != NULL, -EINVAL);
+	spa_return_val_if_fail(info != NULL, -EINVAL);
+	spa_return_val_if_fail(index != NULL, -EINVAL);
+
+	switch (*index) {
+	case 0:
+		*info = &impl_interfaces[*index];
+		break;
+	default:
+		return 0;
+	}
+	(*index)++;
+
+	return 1;
+}
+
+static const struct spa_dict_item handle_info_items[] = {
+        { SPA_KEY_FACTORY_DESCRIPTION, "Bluetooth codec plugin" },
+};
+
+static const struct spa_dict handle_info = SPA_DICT_INIT_ARRAY(handle_info_items);
+
+static struct spa_handle_factory handle_factory = {
+	SPA_VERSION_HANDLE_FACTORY,
+	NULL,
+	&handle_info,
+	impl_get_size,
+	impl_init,
+	impl_enum_interface_info,
+};
+
+SPA_EXPORT
+int spa_handle_factory_enum(const struct spa_handle_factory **factory, uint32_t *index)
+{
+	spa_return_val_if_fail(factory != NULL, -EINVAL);
+	spa_return_val_if_fail(index != NULL, -EINVAL);
+
+	if (handle_factory.name == NULL)
+		handle_factory.name = codec_plugin_factory_name;
+
+	switch (*index) {
+	case 0:
+		*factory = &handle_factory;
+		break;
+	default:
+		return 0;
+	}
+	(*index)++;
+	return 1;
+}
+
+#endif