aboutsummaryrefslogtreecommitdiffstats
path: root/4a-hal/4a-hal-controllers/4a-hal-controllers-api-loader.c
blob: 0691cb5abad10e9037e8fb459b3bedc987774b8f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
/*
 * Copyright (C) 2018 "IoT.bzh"
 * Author Jonathan Aillet <jonathan.aillet@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.
 */

#define _GNU_SOURCE

#include <stdio.h>
#include <string.h>

#include <filescan-utils.h>
#include <wrap-json.h>

#include <afb-definitions.h>

#include <ctl-config.h>

#include "4a-hal-utilities-verbs-loader.h"

#include "4a-hal-controllers-api-loader.h"
#include "4a-hal-controllers-alsacore-link.h"
#include "4a-hal-controllers-cb.h"
#include "4a-hal-controllers-mixer-link.h"

// Default api to print log when apihandle not available
AFB_ApiT AFB_default;

/*******************************************************************************
 *		Json parsing functions using app controller		       *
 ******************************************************************************/

// Config Section definition
static CtlSectionT ctrlSectionsDefault[] =
{
	{ .key = "resources",	.loadCB = PluginConfig },
	{ .key = "halmixer",	.loadCB = HalCtlsHalMixerConfig },
	{ .key = "onload",	.loadCB = OnloadConfig },
	{ .key = "controls",	.loadCB = ControlConfig },
	{ .key = "events",	.loadCB = EventConfig },
	{ .key = "halmap",	.loadCB = HalCtlsHalMapConfig },
	{ .key = NULL }
};

/*******************************************************************************
 *		Dynamic HAL verbs' functions				       *
 ******************************************************************************/

// Every HAL export the same API & Interface Mapping from SndCard to AudioLogic is done through alsaHalSndCardT
static AFB_ApiVerbs CtlHalApiStaticVerbs[] =
{
	/* VERB'S NAME			FUNCTION TO CALL		SHORT DESCRIPTION */
	{ .verb = "info",		.callback = HalCtlsInfo,	.info = "List available streams/playbacks/captures/controls for this api" },
	{ .verb = "subscribe",		.callback = HalCtlsSubscribe,	.info = "Subscribe to event(s) for values changes (streams/playbacks/captures/controls) for this api" },
	{ .verb = "unsubscribe",	.callback = HalCtlsUnsubscribe,	.info = "Unsubscribe to event(s) for values changes (streams/playbacks/captures/controls) for this api" },
	{ .verb = NULL }		// Marker for end of the array
};

/*******************************************************************************
 *		Dynamic API functions for app controller		       *
 ******************************************************************************/

static int HalCtlsInitOneApi(AFB_ApiT apiHandle)
{
	CtlConfigT *ctrlConfig;
	struct SpecificHalData *currentCtlHalData;

	if(! apiHandle)
		return -1;

	// Hugely hack to make all V2 AFB_DEBUG to work in fileutils
	AFB_default = apiHandle;

	// Retrieve section config from api handle
	ctrlConfig = (CtlConfigT *) AFB_ApiGetUserData(apiHandle);
	if(! ctrlConfig)
		return -2;

	currentCtlHalData = (struct SpecificHalData *) getExternalData(ctrlConfig);
	if(! currentCtlHalData)
		return -3;

	// Fill SpecificHalDatadata structure
	currentCtlHalData->internal = 1;

	currentCtlHalData->sndCardPath = (char *) ctrlConfig->uid;
	currentCtlHalData->info = (char *) ctrlConfig->info;

	currentCtlHalData->author = (char *) ctrlConfig->author;
	currentCtlHalData->version = (char *) ctrlConfig->version;
	currentCtlHalData->date = (char *) ctrlConfig->date;

	currentCtlHalData->ctlHalSpecificData->apiHandle = apiHandle;
	currentCtlHalData->ctlHalSpecificData->ctrlConfig = ctrlConfig;

	currentCtlHalData->sndCardId = HalCtlsGetCardIdByCardPath(apiHandle, currentCtlHalData->sndCardPath);

	currentCtlHalData->ctlHalSpecificData->streamUpdates = AFB_EventMake(apiHandle, HAL_STREAM_UPDATES_EVENT_NAME);
	if(! AFB_EventIsValid(currentCtlHalData->ctlHalSpecificData->streamUpdates))
		return -4;

	if(currentCtlHalData->sndCardId < 0)
		currentCtlHalData->status = HAL_STATUS_UNAVAILABLE;
	else
		currentCtlHalData->status = HAL_STATUS_AVAILABLE;

	// TBD JAI: handle refresh of hal status for dynamic card (/dev/by-id)

	return CtlConfigExec(apiHandle, ctrlConfig);
}

static int HalCtlsLoadOneApi(void *cbdata, AFB_ApiT apiHandle)
{
	int err;
	CtlConfigT *ctrlConfig;
	CtlSectionT *ctrlCurrentSections;

	if(! cbdata || ! apiHandle)
		return -1;

	ctrlConfig = (CtlConfigT*) cbdata;

	// Save closure as api's data context
	AFB_ApiSetUserData(apiHandle, ctrlConfig);

	// Add static controls verbs
	if(HalUtlLoadVerbs(apiHandle, CtlHalApiStaticVerbs)) {
		AFB_ApiError(apiHandle, "Load Section : fail to register static V2 verbs");
		return 1;
	}

	ctrlCurrentSections = malloc(sizeof(ctrlSectionsDefault));
	memcpy(ctrlCurrentSections, ctrlSectionsDefault, sizeof(ctrlSectionsDefault));

	// Load section for corresponding Api
	if((err = CtlLoadSections(apiHandle, ctrlConfig, ctrlCurrentSections)))
		return err;

	// Declare an event manager for this Api
	AFB_ApiOnEvent(apiHandle, HalCtlsDispatchApiEvent);

	// Init Api function (does not receive user closure ???)
	AFB_ApiOnInit(apiHandle, HalCtlsInitOneApi);

	return 0;
}

int HalCtlsCreateApi(AFB_ApiT apiHandle, char *path, struct HalMgrData *HalMgrGlobalData)
{
	CtlConfigT *ctrlConfig;
	struct SpecificHalData *currentCtlHalData;

	if(! apiHandle || ! path || ! HalMgrGlobalData)
		return -1;

	// Create one Api per file
	ctrlConfig = CtlLoadMetaData(apiHandle, path);
	if(! ctrlConfig) {
		AFB_ApiError(apiHandle, "No valid control config file in:\n-- %s", path);
		return -2;
	}

	if(! ctrlConfig->api) {
		AFB_ApiError(apiHandle, "API Missing from metadata in:\n-- %s", path);
		return -3;
	}

	// Allocation of current hal controller data
	currentCtlHalData = HalUtlAddHalApiToHalList(&HalMgrGlobalData->first);
	if(! currentCtlHalData)
		return -4;

	currentCtlHalData->apiName = (char *) ctrlConfig->api;

	// Stores current hal controller data in controller config
	setExternalData(ctrlConfig, (void *) currentCtlHalData);

	// Allocation of the structure that will be used to store specific hal controller data
	currentCtlHalData->ctlHalSpecificData = calloc(1, sizeof(struct CtlHalSpecificData));

	// Create one API (Pre-V3 return code ToBeChanged)
	if(! AFB_NewApi(apiHandle, ctrlConfig->api, ctrlConfig->info, 1, HalCtlsLoadOneApi, ctrlConfig))
		return -5;

	return 0;
}

int HalCtlsCreateAllApi(AFB_ApiT apiHandle, struct HalMgrData *HalMgrGlobalData)
{
	int index, status = 0;
	char *dirList, *fileName, *fullPath;
	char filePath[CONTROL_MAXPATH_LEN];

	filePath[CONTROL_MAXPATH_LEN - 1] = '\0';

	json_object *configJ, *entryJ;

	if(! apiHandle || ! HalMgrGlobalData)
		return -1;

	// Hugely hack to make all V2 AFB_DEBUG to work in fileutils
	AFB_default = apiHandle;

	AFB_ApiNotice(apiHandle, "Begining to create all APIs");

	dirList = getenv("CONTROL_CONFIG_PATH");
	if(! dirList)
		dirList = CONTROL_CONFIG_PATH;

	configJ = CtlConfigScan(dirList, "hal");
	if(! configJ) {
		AFB_ApiWarning(apiHandle, "No hal-(binder-middle-name)*.json config file(s) found in %s, 4a-hal-manager will only works with external hal", dirList);
		return 0;
	}

	// We load 1st file others are just warnings
	for(index = 0; index < (int) json_object_array_length(configJ); index++) {
		entryJ = json_object_array_get_idx(configJ, index);

		if(wrap_json_unpack(entryJ, "{s:s, s:s !}", "fullpath", &fullPath, "filename", &fileName)) {
			AFB_ApiError(apiHandle, "HOOPs invalid JSON entry = %s", json_object_get_string(entryJ));
			return -2;
		}

		strncpy(filePath, fullPath, sizeof(filePath) - 1);
		strncat(filePath, "/", sizeof(filePath) - 1);
		strncat(filePath, fileName, sizeof(filePath) - 1);

		if(HalCtlsCreateApi(apiHandle, filePath, HalMgrGlobalData) < 0)
			status--;
	}

	return status;
}