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authorJonathan Aillet <jonathan.aillet@iot.bzh>2018-11-07 17:00:36 +0900
committerThierry Bultel <thierry.bultel@iot.bzh>2018-11-07 11:38:41 +0100
commit92e0380860dbc556ef2a1f9fbc0cd7eb99edad69 (patch)
tree041e305147b5148f87872d97f58ae24eda372679 /plugins/alsa/alsa-api-zones.c
parent0e37ab93b7c611d4c1f94c4bfbee7acf312c9aec (diff)
Handle too small card PCM buffer when writing
In the writing thread, handle the case when 'writing threshold' was smaller than ALSA sound card's PCM buffer (defined in the driver). This avoids waiting indefinitely for a buffer to contain a wanted number of frames that it cannot contain. Change-Id: Ie1aa69ea1a93471ed46d571c669ec08a1b827476 Signed-off-by: Jonathan Aillet <jonathan.aillet@iot.bzh>
Diffstat (limited to 'plugins/alsa/alsa-api-zones.c')
0 files changed, 0 insertions, 0 deletions
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/*
 * Copyright (C) 2016 "IoT.bzh"
 * Author: José Bollo <jose.bollo@iot.bzh>
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#pragma once

/* avoid inclusion of <json-c/json.h> */
struct json_object;

/*
 * Interface for internal of services
 * It records the functions to be called for the request.
 * Don't use this structure directly.
 * Use the helper functions documented below.
 */
struct afb_service_itf
{
	/* CAUTION: respect the order, add at the end */

	void (*call)(void *closure, const char *api, const char *verb, struct json_object *args, void (*callback)(void*, int, struct json_object*), void *callback_closure);
};

/*
 * Object that encapsulate accesses to service items
 */
struct afb_service
{
	const struct afb_service_itf *itf;
	void *closure;
};

/*
 * When a binding have an exported implementation of the
 * function 'afbBindingV1ServiceInit', defined below,
 * the framework calls it for initialising the service after
 * registration of all bindings.
 *
 * The object 'service' should be recorded. It has functions that
 * allows the binding to call features with its own personality.
 *
 * The function should return 0 in case of success or, else, should return
 * a negative value.
 */
extern int afbBindingV1ServiceInit(struct afb_service service);

/*
 * When a binding have an implementation of the function 'afbBindingV1ServiceEvent',
 * defined below, the framework calls that function for any broadcasted event or for
 * events that the service subscribed to in its name.
 *
 * It receive the 'event' name and its related data in 'object' (be aware that 'object'
 * might be NULL).
 */
extern void afbBindingV1ServiceEvent(const char *event, struct json_object *object);

/*
 * Calls the 'verb' of the 'api' with the arguments 'args' and 'verb' in the name of the binding.
 * The result of the call is delivered to the 'callback' function with the 'callback_closure'.
 *
 * The 'callcack' receives 3 arguments:
 *  1. 'closure' the user defined closure pointer 'callback_closure',
 *  2. 'iserror' a boolean status being true (not null) when an error occured,
 *  2. 'result' the resulting data as a JSON object.
 *
 * See also 'afb_req_subcall'
 *
 * Returns 0in case of success or -1 in case of error.
 */
static inline void afb_service_call(struct afb_service service, const char *api, const char *verb, struct json_object *args, void (*callback)(void*closure, int iserror, struct json_object *result), void *callback_closure)
{
	service.itf->call(service.closure, api, verb, args, callback, callback_closure);
}