1 /*
2  * Copyright (C) 2015 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #define LOG_TAG "APM::Serializer"
18 //#define LOG_NDEBUG 0
19 
20 #include "Serializer.h"
21 #include <convert/convert.h>
22 #include "TypeConverter.h"
23 #include <libxml/parser.h>
24 #include <libxml/xinclude.h>
25 #include <string>
26 #include <sstream>
27 #include <istream>
28 
29 using std::string;
30 
31 namespace android {
32 
getXmlAttribute(const xmlNode * cur,const char * attribute)33 string getXmlAttribute(const xmlNode *cur, const char *attribute)
34 {
35     xmlChar *xmlValue = xmlGetProp(cur, (const xmlChar*)attribute);
36     if (xmlValue == NULL) {
37         return "";
38     }
39     string value((const char*)xmlValue);
40     xmlFree(xmlValue);
41     return value;
42 }
43 
44 using utilities::convertTo;
45 
46 const char *const PolicySerializer::rootName = "audioPolicyConfiguration";
47 const char *const PolicySerializer::versionAttribute = "version";
48 const uint32_t PolicySerializer::gMajor = 1;
49 const uint32_t PolicySerializer::gMinor = 0;
50 static const char *const gReferenceElementName = "reference";
51 static const char *const gReferenceAttributeName = "name";
52 
53 template <class Trait>
getReference(const _xmlNode * root,const _xmlNode * & refNode,const string & refName)54 static void getReference(const _xmlNode *root, const _xmlNode *&refNode, const string &refName)
55 {
56     const _xmlNode *col = root;
57     while (col != NULL) {
58         if (!xmlStrcmp(col->name, (const xmlChar *)Trait::collectionTag)) {
59             const xmlNode *cur = col->children;
60             while (cur != NULL) {
61                 if ((!xmlStrcmp(cur->name, (const xmlChar *)gReferenceElementName))) {
62                     string name = getXmlAttribute(cur, gReferenceAttributeName);
63                     if (refName == name) {
64                         refNode = cur;
65                         return;
66                     }
67                 }
68                 cur = cur->next;
69             }
70         }
71         col = col->next;
72     }
73     return;
74 }
75 
76 template <class Trait>
deserializeCollection(_xmlDoc * doc,const _xmlNode * cur,typename Trait::Collection & collection,typename Trait::PtrSerializingCtx serializingContext)77 static status_t deserializeCollection(_xmlDoc *doc, const _xmlNode *cur,
78                                       typename Trait::Collection &collection,
79                                       typename Trait::PtrSerializingCtx serializingContext)
80 {
81     const xmlNode *root = cur->xmlChildrenNode;
82     while (root != NULL) {
83         if (xmlStrcmp(root->name, (const xmlChar *)Trait::collectionTag) &&
84                 xmlStrcmp(root->name, (const xmlChar *)Trait::tag)) {
85             root = root->next;
86             continue;
87         }
88         const xmlNode *child = root;
89         if (!xmlStrcmp(child->name, (const xmlChar *)Trait::collectionTag)) {
90             child = child->xmlChildrenNode;
91         }
92         while (child != NULL) {
93             if (!xmlStrcmp(child->name, (const xmlChar *)Trait::tag)) {
94                 typename Trait::PtrElement element;
95                 status_t status = Trait::deserialize(doc, child, element, serializingContext);
96                 if (status != NO_ERROR) {
97                     return status;
98                 }
99                 if (collection.add(element) < 0) {
100                     ALOGE("%s: could not add element to %s collection", __FUNCTION__,
101                           Trait::collectionTag);
102                 }
103             }
104             child = child->next;
105         }
106         if (!xmlStrcmp(root->name, (const xmlChar *)Trait::tag)) {
107             return NO_ERROR;
108         }
109         root = root->next;
110     }
111     return NO_ERROR;
112 }
113 
114 const char *const AudioGainTraits::tag = "gain";
115 const char *const AudioGainTraits::collectionTag = "gains";
116 
117 const char AudioGainTraits::Attributes::mode[] = "mode";
118 const char AudioGainTraits::Attributes::channelMask[] = "channel_mask";
119 const char AudioGainTraits::Attributes::minValueMB[] = "minValueMB";
120 const char AudioGainTraits::Attributes::maxValueMB[] = "maxValueMB";
121 const char AudioGainTraits::Attributes::defaultValueMB[] = "defaultValueMB";
122 const char AudioGainTraits::Attributes::stepValueMB[] = "stepValueMB";
123 const char AudioGainTraits::Attributes::minRampMs[] = "minRampMs";
124 const char AudioGainTraits::Attributes::maxRampMs[] = "maxRampMs";
125 
deserialize(_xmlDoc *,const _xmlNode * root,PtrElement & gain,PtrSerializingCtx)126 status_t AudioGainTraits::deserialize(_xmlDoc */*doc*/, const _xmlNode *root, PtrElement &gain,
127                                       PtrSerializingCtx /*serializingContext*/)
128 {
129     static uint32_t index = 0;
130     gain = new Element(index++, true);
131 
132     string mode = getXmlAttribute(root, Attributes::mode);
133     if (!mode.empty()) {
134         gain->setMode(GainModeConverter::maskFromString(mode));
135     }
136 
137     string channelsLiteral = getXmlAttribute(root, Attributes::channelMask);
138     if (!channelsLiteral.empty()) {
139         gain->setChannelMask(channelMaskFromString(channelsLiteral));
140     }
141 
142     string minValueMBLiteral = getXmlAttribute(root, Attributes::minValueMB);
143     uint32_t minValueMB;
144     if (!minValueMBLiteral.empty() && convertTo(minValueMBLiteral, minValueMB)) {
145         gain->setMinValueInMb(minValueMB);
146     }
147 
148     string maxValueMBLiteral = getXmlAttribute(root, Attributes::maxValueMB);
149     uint32_t maxValueMB;
150     if (!maxValueMBLiteral.empty() && convertTo(maxValueMBLiteral, maxValueMB)) {
151         gain->setMaxValueInMb(maxValueMB);
152     }
153 
154     string defaultValueMBLiteral = getXmlAttribute(root, Attributes::defaultValueMB);
155     uint32_t defaultValueMB;
156     if (!defaultValueMBLiteral.empty() && convertTo(defaultValueMBLiteral, defaultValueMB)) {
157         gain->setDefaultValueInMb(defaultValueMB);
158     }
159 
160     string stepValueMBLiteral = getXmlAttribute(root, Attributes::stepValueMB);
161     uint32_t stepValueMB;
162     if (!stepValueMBLiteral.empty() && convertTo(stepValueMBLiteral, stepValueMB)) {
163         gain->setStepValueInMb(stepValueMB);
164     }
165 
166     string minRampMsLiteral = getXmlAttribute(root, Attributes::minRampMs);
167     uint32_t minRampMs;
168     if (!minRampMsLiteral.empty() && convertTo(minRampMsLiteral, minRampMs)) {
169         gain->setMinRampInMs(minRampMs);
170     }
171 
172     string maxRampMsLiteral = getXmlAttribute(root, Attributes::maxRampMs);
173     uint32_t maxRampMs;
174     if (!maxRampMsLiteral.empty() && convertTo(maxRampMsLiteral, maxRampMs)) {
175         gain->setMaxRampInMs(maxRampMs);
176     }
177     ALOGV("%s: adding new gain mode %08x channel mask %08x min mB %d max mB %d", __FUNCTION__,
178           gain->getMode(), gain->getChannelMask(), gain->getMinValueInMb(),
179           gain->getMaxValueInMb());
180 
181     if (gain->getMode() == 0) {
182         return BAD_VALUE;
183     }
184     return NO_ERROR;
185 }
186 
187 const char *const AudioProfileTraits::collectionTag = "profiles";
188 const char *const AudioProfileTraits::tag = "profile";
189 
190 const char AudioProfileTraits::Attributes::name[] = "name";
191 const char AudioProfileTraits::Attributes::samplingRates[] = "samplingRates";
192 const char AudioProfileTraits::Attributes::format[] = "format";
193 const char AudioProfileTraits::Attributes::channelMasks[] = "channelMasks";
194 
deserialize(_xmlDoc *,const _xmlNode * root,PtrElement & profile,PtrSerializingCtx)195 status_t AudioProfileTraits::deserialize(_xmlDoc */*doc*/, const _xmlNode *root, PtrElement &profile,
196                                          PtrSerializingCtx /*serializingContext*/)
197 {
198     string samplingRates = getXmlAttribute(root, Attributes::samplingRates);
199     string format = getXmlAttribute(root, Attributes::format);
200     string channels = getXmlAttribute(root, Attributes::channelMasks);
201 
202     profile = new Element(formatFromString(format), channelMasksFromString(channels, ","),
203                           samplingRatesFromString(samplingRates, ","));
204 
205     profile->setDynamicFormat(profile->getFormat() == gDynamicFormat);
206     profile->setDynamicChannels(profile->getChannels().isEmpty());
207     profile->setDynamicRate(profile->getSampleRates().isEmpty());
208 
209     return NO_ERROR;
210 }
211 
212 
213 const char *const MixPortTraits::collectionTag = "mixPorts";
214 const char *const MixPortTraits::tag = "mixPort";
215 
216 const char MixPortTraits::Attributes::name[] = "name";
217 const char MixPortTraits::Attributes::role[] = "role";
218 const char MixPortTraits::Attributes::flags[] = "flags";
219 
deserialize(_xmlDoc * doc,const _xmlNode * child,PtrElement & mixPort,PtrSerializingCtx)220 status_t MixPortTraits::deserialize(_xmlDoc *doc, const _xmlNode *child, PtrElement &mixPort,
221                                     PtrSerializingCtx /*serializingContext*/)
222 {
223     string name = getXmlAttribute(child, Attributes::name);
224     if (name.empty()) {
225         ALOGE("%s: No %s found", __FUNCTION__, Attributes::name);
226         return BAD_VALUE;
227     }
228     ALOGV("%s: %s %s=%s", __FUNCTION__, tag, Attributes::name, name.c_str());
229     string role = getXmlAttribute(child, Attributes::role);
230     if (role.empty()) {
231         ALOGE("%s: No %s found", __FUNCTION__, Attributes::role);
232         return BAD_VALUE;
233     }
234     ALOGV("%s: Role=%s", __FUNCTION__, role.c_str());
235     audio_port_role_t portRole = role == "source" ? AUDIO_PORT_ROLE_SOURCE : AUDIO_PORT_ROLE_SINK;
236 
237     mixPort = new Element(String8(name.c_str()), portRole);
238 
239     AudioProfileTraits::Collection profiles;
240     deserializeCollection<AudioProfileTraits>(doc, child, profiles, NULL);
241     if (profiles.isEmpty()) {
242         sp <AudioProfile> dynamicProfile = new AudioProfile(gDynamicFormat,
243                                                             ChannelsVector(), SampleRateVector());
244         dynamicProfile->setDynamicFormat(true);
245         dynamicProfile->setDynamicChannels(true);
246         dynamicProfile->setDynamicRate(true);
247         profiles.add(dynamicProfile);
248     }
249     mixPort->setAudioProfiles(profiles);
250 
251     string flags = getXmlAttribute(child, Attributes::flags);
252     if (!flags.empty()) {
253         // Source role
254         if (portRole == AUDIO_PORT_ROLE_SOURCE) {
255             mixPort->setFlags(OutputFlagConverter::maskFromString(flags));
256         } else {
257             // Sink role
258             mixPort->setFlags(InputFlagConverter::maskFromString(flags));
259         }
260     }
261     // Deserialize children
262     AudioGainTraits::Collection gains;
263     deserializeCollection<AudioGainTraits>(doc, child, gains, NULL);
264     mixPort->setGains(gains);
265 
266     return NO_ERROR;
267 }
268 
269 const char *const DevicePortTraits::tag = "devicePort";
270 const char *const DevicePortTraits::collectionTag = "devicePorts";
271 
272 const char DevicePortTraits::Attributes::tagName[] = "tagName";
273 const char DevicePortTraits::Attributes::type[] = "type";
274 const char DevicePortTraits::Attributes::role[] = "role";
275 const char DevicePortTraits::Attributes::address[] = "address";
276 const char DevicePortTraits::Attributes::roleSource[] = "source";
277 
deserialize(_xmlDoc * doc,const _xmlNode * root,PtrElement & deviceDesc,PtrSerializingCtx)278 status_t DevicePortTraits::deserialize(_xmlDoc *doc, const _xmlNode *root, PtrElement &deviceDesc,
279                                        PtrSerializingCtx /*serializingContext*/)
280 {
281     string name = getXmlAttribute(root, Attributes::tagName);
282     if (name.empty()) {
283         ALOGE("%s: No %s found", __FUNCTION__, Attributes::tagName);
284         return BAD_VALUE;
285     }
286     ALOGV("%s: %s %s=%s", __FUNCTION__, tag, Attributes::tagName, name.c_str());
287     string typeName = getXmlAttribute(root, Attributes::type);
288     if (typeName.empty()) {
289         ALOGE("%s: no type for %s", __FUNCTION__, name.c_str());
290         return BAD_VALUE;
291     }
292     ALOGV("%s: %s %s=%s", __FUNCTION__, tag, Attributes::type, typeName.c_str());
293     string role = getXmlAttribute(root, Attributes::role);
294     if (role.empty()) {
295         ALOGE("%s: No %s found", __FUNCTION__, Attributes::role);
296         return BAD_VALUE;
297     }
298     ALOGV("%s: %s %s=%s", __FUNCTION__, tag, Attributes::role, role.c_str());
299     audio_port_role_t portRole = (role == Attributes::roleSource) ?
300                 AUDIO_PORT_ROLE_SOURCE : AUDIO_PORT_ROLE_SINK;
301 
302     audio_devices_t type = AUDIO_DEVICE_NONE;
303     if (!DeviceConverter::fromString(typeName, type) ||
304             (!audio_is_input_device(type) && portRole == AUDIO_PORT_ROLE_SOURCE) ||
305             (!audio_is_output_devices(type) && portRole == AUDIO_PORT_ROLE_SINK)) {
306         ALOGW("%s: bad type %08x", __FUNCTION__, type);
307         return BAD_VALUE;
308     }
309     deviceDesc = new Element(type, String8(name.c_str()));
310 
311     string address = getXmlAttribute(root, Attributes::address);
312     if (!address.empty()) {
313         ALOGV("%s: address=%s for %s", __FUNCTION__, address.c_str(), name.c_str());
314         deviceDesc->mAddress = String8(address.c_str());
315     }
316 
317     AudioProfileTraits::Collection profiles;
318     deserializeCollection<AudioProfileTraits>(doc, root, profiles, NULL);
319     if (profiles.isEmpty()) {
320         sp <AudioProfile> dynamicProfile = new AudioProfile(gDynamicFormat,
321                                                             ChannelsVector(), SampleRateVector());
322         dynamicProfile->setDynamicFormat(true);
323         dynamicProfile->setDynamicChannels(true);
324         dynamicProfile->setDynamicRate(true);
325         profiles.add(dynamicProfile);
326     }
327     deviceDesc->setAudioProfiles(profiles);
328 
329     // Deserialize AudioGain children
330     deserializeCollection<AudioGainTraits>(doc, root, deviceDesc->mGains, NULL);
331     ALOGV("%s: adding device tag %s type %08x address %s", __FUNCTION__,
332           deviceDesc->getName().string(), type, deviceDesc->mAddress.string());
333     return NO_ERROR;
334 }
335 
336 const char *const RouteTraits::tag = "route";
337 const char *const RouteTraits::collectionTag = "routes";
338 
339 const char RouteTraits::Attributes::type[] = "type";
340 const char RouteTraits::Attributes::typeMix[] = "mix";
341 const char RouteTraits::Attributes::sink[] = "sink";
342 const char RouteTraits::Attributes::sources[] = "sources";
343 
344 
deserialize(_xmlDoc *,const _xmlNode * root,PtrElement & element,PtrSerializingCtx ctx)345 status_t RouteTraits::deserialize(_xmlDoc */*doc*/, const _xmlNode *root, PtrElement &element,
346                                   PtrSerializingCtx ctx)
347 {
348     string type = getXmlAttribute(root, Attributes::type);
349     if (type.empty()) {
350         ALOGE("%s: No %s found", __FUNCTION__, Attributes::type);
351         return BAD_VALUE;
352     }
353     audio_route_type_t routeType = (type == Attributes::typeMix) ?
354                 AUDIO_ROUTE_MIX : AUDIO_ROUTE_MUX;
355 
356     ALOGV("%s: %s %s=%s", __FUNCTION__, tag, Attributes::type, type.c_str());
357     element = new Element(routeType);
358 
359     string sinkAttr = getXmlAttribute(root, Attributes::sink);
360     if (sinkAttr.empty()) {
361         ALOGE("%s: No %s found", __FUNCTION__, Attributes::sink);
362         return BAD_VALUE;
363     }
364     // Convert Sink name to port pointer
365     sp<AudioPort> sink = ctx->findPortByTagName(String8(sinkAttr.c_str()));
366     if (sink == NULL) {
367         ALOGE("%s: no sink found with name=%s", __FUNCTION__, sinkAttr.c_str());
368         return BAD_VALUE;
369     }
370     element->setSink(sink);
371 
372     string sourcesAttr = getXmlAttribute(root, Attributes::sources);
373     if (sourcesAttr.empty()) {
374         ALOGE("%s: No %s found", __FUNCTION__, Attributes::sources);
375         return BAD_VALUE;
376     }
377     // Tokenize and Convert Sources name to port pointer
378     AudioPortVector sources;
379     char *sourcesLiteral = strndup(sourcesAttr.c_str(), strlen(sourcesAttr.c_str()));
380     char *devTag = strtok(sourcesLiteral, ",");
381     while (devTag != NULL) {
382         if (strlen(devTag) != 0) {
383             sp<AudioPort> source = ctx->findPortByTagName(String8(devTag));
384             if (source == NULL) {
385                 ALOGE("%s: no source found with name=%s", __FUNCTION__, devTag);
386                 return BAD_VALUE;
387             }
388             sources.add(source);
389         }
390         devTag = strtok(NULL, ",");
391     }
392     free(sourcesLiteral);
393 
394     sink->addRoute(element);
395     for (size_t i = 0; i < sources.size(); i++) {
396         sp<AudioPort> source = sources.itemAt(i);
397         source->addRoute(element);
398     }
399     element->setSources(sources);
400     return NO_ERROR;
401 }
402 
403 const char *const ModuleTraits::childAttachedDevicesTag = "attachedDevices";
404 const char *const ModuleTraits::childAttachedDeviceTag = "item";
405 const char *const ModuleTraits::childDefaultOutputDeviceTag = "defaultOutputDevice";
406 
407 const char *const ModuleTraits::tag = "module";
408 const char *const ModuleTraits::collectionTag = "modules";
409 
410 const char ModuleTraits::Attributes::name[] = "name";
411 const char ModuleTraits::Attributes::version[] = "halVersion";
412 
deserialize(xmlDocPtr doc,const xmlNode * root,PtrElement & module,PtrSerializingCtx ctx)413 status_t ModuleTraits::deserialize(xmlDocPtr doc, const xmlNode *root, PtrElement &module,
414                                    PtrSerializingCtx ctx)
415 {
416     string name = getXmlAttribute(root, Attributes::name);
417     if (name.empty()) {
418         ALOGE("%s: No %s found", __FUNCTION__, Attributes::name);
419         return BAD_VALUE;
420     }
421     uint32_t version = AUDIO_DEVICE_API_VERSION_MIN;
422     string versionLiteral = getXmlAttribute(root, Attributes::version);
423     if (!versionLiteral.empty()) {
424         uint32_t major, minor;
425         sscanf(versionLiteral.c_str(), "%u.%u", &major, &minor);
426         version = HARDWARE_DEVICE_API_VERSION(major, minor);
427         ALOGV("%s: mHalVersion = %04x major %u minor %u",  __FUNCTION__,
428               version, major, minor);
429     }
430 
431     ALOGV("%s: %s %s=%s", __FUNCTION__, tag, Attributes::name, name.c_str());
432 
433     module = new Element(name.c_str(), version);
434 
435     // Deserialize childrens: Audio Mix Port, Audio Device Ports (Source/Sink), Audio Routes
436     MixPortTraits::Collection mixPorts;
437     deserializeCollection<MixPortTraits>(doc, root, mixPorts, NULL);
438     module->setProfiles(mixPorts);
439 
440     DevicePortTraits::Collection devicePorts;
441     deserializeCollection<DevicePortTraits>(doc, root, devicePorts, NULL);
442     module->setDeclaredDevices(devicePorts);
443 
444     RouteTraits::Collection routes;
445     deserializeCollection<RouteTraits>(doc, root, routes, module.get());
446     module->setRoutes(routes);
447 
448     const xmlNode *children = root->xmlChildrenNode;
449     while (children != NULL) {
450         if (!xmlStrcmp(children->name, (const xmlChar *)childAttachedDevicesTag)) {
451             ALOGV("%s: %s %s found", __FUNCTION__, tag, childAttachedDevicesTag);
452             const xmlNode *child = children->xmlChildrenNode;
453             while (child != NULL) {
454                 if (!xmlStrcmp(child->name, (const xmlChar *)childAttachedDeviceTag)) {
455                     xmlChar *attachedDevice = xmlNodeListGetString(doc, child->xmlChildrenNode, 1);
456                     if (attachedDevice != NULL) {
457                         ALOGV("%s: %s %s=%s", __FUNCTION__, tag, childAttachedDeviceTag,
458                               (const char*)attachedDevice);
459                         sp<DeviceDescriptor> device =
460                                 module->getDeclaredDevices().getDeviceFromTagName(String8((const char*)attachedDevice));
461                         ctx->addAvailableDevice(device);
462                         xmlFree(attachedDevice);
463                     }
464                 }
465                 child = child->next;
466             }
467         }
468         if (!xmlStrcmp(children->name, (const xmlChar *)childDefaultOutputDeviceTag)) {
469             xmlChar *defaultOutputDevice = xmlNodeListGetString(doc, children->xmlChildrenNode, 1);;
470             if (defaultOutputDevice != NULL) {
471                 ALOGV("%s: %s %s=%s", __FUNCTION__, tag, childDefaultOutputDeviceTag,
472                       (const char*)defaultOutputDevice);
473                 sp<DeviceDescriptor> device =
474                         module->getDeclaredDevices().getDeviceFromTagName(String8((const char*)defaultOutputDevice));
475                 if (device != 0 && ctx->getDefaultOutputDevice() == 0) {
476                     ctx->setDefaultOutputDevice(device);
477                     ALOGV("%s: default is %08x", __FUNCTION__, ctx->getDefaultOutputDevice()->type());
478                 }
479                 xmlFree(defaultOutputDevice);
480             }
481         }
482         children = children->next;
483     }
484     return NO_ERROR;
485 }
486 
487 const char *const GlobalConfigTraits::tag = "globalConfiguration";
488 
489 const char GlobalConfigTraits::Attributes::speakerDrcEnabled[] = "speaker_drc_enabled";
490 
491 
deserialize(const xmlNode * cur,AudioPolicyConfig & config)492 status_t GlobalConfigTraits::deserialize(const xmlNode *cur, AudioPolicyConfig &config)
493 {
494     const xmlNode *root = cur->xmlChildrenNode;
495     while (root != NULL) {
496         if (!xmlStrcmp(root->name, (const xmlChar *)tag)) {
497             string speakerDrcEnabled =
498                     getXmlAttribute(root, Attributes::speakerDrcEnabled);
499             bool isSpeakerDrcEnabled;
500             if (!speakerDrcEnabled.empty() &&
501                     convertTo<string, bool>(speakerDrcEnabled, isSpeakerDrcEnabled)) {
502                 config.setSpeakerDrcEnabled(isSpeakerDrcEnabled);
503             }
504             return NO_ERROR;
505         }
506         root = root->next;
507     }
508     return NO_ERROR;
509 }
510 
511 
512 const char *const VolumeTraits::tag = "volume";
513 const char *const VolumeTraits::collectionTag = "volumes";
514 const char *const VolumeTraits::volumePointTag = "point";
515 
516 const char VolumeTraits::Attributes::stream[] = "stream";
517 const char VolumeTraits::Attributes::deviceCategory[] = "deviceCategory";
518 const char VolumeTraits::Attributes::reference[] = "ref";
519 
deserialize(_xmlDoc * doc,const _xmlNode * root,PtrElement & element,PtrSerializingCtx)520 status_t VolumeTraits::deserialize(_xmlDoc *doc, const _xmlNode *root, PtrElement &element,
521                                    PtrSerializingCtx /*serializingContext*/)
522 {
523     string streamTypeLiteral = getXmlAttribute(root, Attributes::stream);
524     if (streamTypeLiteral.empty()) {
525         ALOGE("%s: No %s found", __FUNCTION__, Attributes::stream);
526         return BAD_VALUE;
527     }
528     audio_stream_type_t streamType;
529     if (!StreamTypeConverter::fromString(streamTypeLiteral, streamType)) {
530         ALOGE("%s: Invalid %s", __FUNCTION__, Attributes::stream);
531         return BAD_VALUE;
532     }
533     string deviceCategoryLiteral = getXmlAttribute(root, Attributes::deviceCategory);
534     if (deviceCategoryLiteral.empty()) {
535         ALOGE("%s: No %s found", __FUNCTION__, Attributes::deviceCategory);
536         return BAD_VALUE;
537     }
538     device_category deviceCategory;
539     if (!DeviceCategoryConverter::fromString(deviceCategoryLiteral, deviceCategory)) {
540         ALOGE("%s: Invalid %s=%s", __FUNCTION__, Attributes::deviceCategory,
541               deviceCategoryLiteral.c_str());
542         return BAD_VALUE;
543     }
544 
545     string referenceName = getXmlAttribute(root, Attributes::reference);
546     const _xmlNode *ref = NULL;
547     if (!referenceName.empty()) {
548         getReference<VolumeTraits>(root->parent, ref, referenceName);
549         if (ref == NULL) {
550             ALOGE("%s: No reference Ptr found for %s", __FUNCTION__, referenceName.c_str());
551             return BAD_VALUE;
552         }
553     }
554 
555     element = new Element(deviceCategory, streamType);
556 
557     const xmlNode *child = referenceName.empty() ? root->xmlChildrenNode : ref->xmlChildrenNode;
558     while (child != NULL) {
559         if (!xmlStrcmp(child->name, (const xmlChar *)volumePointTag)) {
560             xmlChar *pointDefinition = xmlNodeListGetString(doc, child->xmlChildrenNode, 1);;
561             if (pointDefinition == NULL) {
562                 return BAD_VALUE;
563             }
564             ALOGV("%s: %s=%s", __FUNCTION__, tag, (const char*)pointDefinition);
565             Vector<int32_t> point;
566             collectionFromString<DefaultTraits<int32_t> >((const char*)pointDefinition, point, ",");
567             if (point.size() != 2) {
568                 ALOGE("%s: Invalid %s: %s", __FUNCTION__, volumePointTag,
569                       (const char*)pointDefinition);
570                 return BAD_VALUE;
571             }
572             element->add(CurvePoint(point[0], point[1]));
573             xmlFree(pointDefinition);
574         }
575         child = child->next;
576     }
577     return NO_ERROR;
578 }
579 
PolicySerializer()580 PolicySerializer::PolicySerializer() : mRootElementName(rootName)
581 {
582     std::ostringstream oss;
583     oss << gMajor << "." << gMinor;
584     mVersion = oss.str();
585     ALOGV("%s: Version=%s Root=%s", __FUNCTION__, mVersion.c_str(), mRootElementName.c_str());
586 }
587 
deserialize(const char * configFile,AudioPolicyConfig & config)588 status_t PolicySerializer::deserialize(const char *configFile, AudioPolicyConfig &config)
589 {
590     xmlDocPtr doc;
591     doc = xmlParseFile(configFile);
592     if (doc == NULL) {
593         ALOGE("%s: Could not parse %s document.", __FUNCTION__, configFile);
594         return BAD_VALUE;
595     }
596     xmlNodePtr cur = xmlDocGetRootElement(doc);
597     if (cur == NULL) {
598         ALOGE("%s: Could not parse %s document: empty.", __FUNCTION__, configFile);
599         xmlFreeDoc(doc);
600         return BAD_VALUE;
601     }
602     if (xmlXIncludeProcess(doc) < 0) {
603          ALOGE("%s: libxml failed to resolve XIncludes on %s document.", __FUNCTION__, configFile);
604     }
605 
606     if (xmlStrcmp(cur->name, (const xmlChar *) mRootElementName.c_str()))  {
607         ALOGE("%s: No %s root element found in xml data %s.", __FUNCTION__, mRootElementName.c_str(),
608               (const char *)cur->name);
609         xmlFreeDoc(doc);
610         return BAD_VALUE;
611     }
612 
613     string version = getXmlAttribute(cur, versionAttribute);
614     if (version.empty()) {
615         ALOGE("%s: No version found in root node %s", __FUNCTION__, mRootElementName.c_str());
616         return BAD_VALUE;
617     }
618     if (version != mVersion) {
619         ALOGE("%s: Version does not match; expect %s got %s", __FUNCTION__, mVersion.c_str(),
620               version.c_str());
621         return BAD_VALUE;
622     }
623     // Lets deserialize children
624     // Modules
625     ModuleTraits::Collection modules;
626     deserializeCollection<ModuleTraits>(doc, cur, modules, &config);
627     config.setHwModules(modules);
628 
629     // deserialize volume section
630     VolumeTraits::Collection volumes;
631     deserializeCollection<VolumeTraits>(doc, cur, volumes, &config);
632     config.setVolumes(volumes);
633 
634     // Global Configuration
635     GlobalConfigTraits::deserialize(cur, config);
636 
637     xmlFreeDoc(doc);
638     return android::OK;
639 }
640 
641 }; // namespace android
642