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/*
* Copyright (C) 2017 "Audiokinetic Inc"
*
* 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.
*/
#ifndef AHL_POLICY_UTILS_INCLUDE
#define AHL_POLICY_UTILS_INCLUDE
#include <json-c/json.h>
#define AHL_POLICY_ACCEPT 1
#define AHL_POLICY_REJECT 0
#define AHL_POLICY_UTIL_SUCCESS 0
#define AHL_POLICY_UTIL_FAIL 1
#define AHL_UNDEFINED -1
typedef int endpointID_t;
typedef int streamID_t;
typedef enum StreamEvent {
STREAM_EVENT_START = 0, // Stream is inactive
STREAM_EVENT_STOP, // Stream is running
STREAM_EVENT_PAUSE, // Audio stream paused
STREAM_EVENT_RESUME, // Audio stream resumed
STREAM_EVENT_MUTED, // Audio stream muted
STREAM_EVENT_UNMUTED, // Audio stream unmuted
STREAM_EVENT_MAXVALUE // Enum count, keep at the end
} StreamEventT;
typedef enum StreamMute {
STREAM_UNMUTED = 0, // Stream is not muted
STREAM_MUTED, // Stream is muted
STREAM_MUTE_MAXVALUE, // Enum count, keep at the end
} StreamMuteT;
typedef enum EndpointType {
ENDPOINTTYPE_SOURCE = 0, // source devices
ENDPOINTTYPE_SINK, // sink devices
ENDPOINTTYPE_MAXVALUE // Enum count, keep at the end
} EndpointTypeT;
typedef enum StreamState {
STREAM_STATE_IDLE = 0, // Stream is inactive
STREAM_STATE_RUNNING, // Stream is active and running
STREAM_STATE_PAUSED, // Stream is active but paused
STREAM_STATE_MAXVALUE // Enum count, keep at the end
} StreamStateT;
// Define default behavior of audio role when interrupting lower priority sources
typedef enum InterruptBehavior {
INTERRUPTBEHAVIOR_CONTINUE = 0, // Continue to play lower priority source when interrupted (e.g. media may be ducked)
INTERRUPTBEHAVIOR_CANCEL, // Abort playback of lower priority source when interrupted (e.g. non-important HMI feedback that does not make sense later)
INTERRUPTBEHAVIOR_PAUSE, // Pause lower priority source when interrupted, to be resumed afterwards (e.g. non-temporal guidance)
INTERRUPTBEHAVIOR_MAXVALUE, // Enum count, keep at the end
} InterruptBehaviorT;
typedef enum DeviceURIType {
DEVICEURITYPE_ALSA_HW = 0, // Alsa hardware device URI
DEVICEURITYPE_ALSA_DMIX, // Alsa Dmix device URI (only for playback devices)
DEVICEURITYPE_ALSA_DSNOOP, // Alsa DSnoop device URI (only for capture devices)
DEVICEURITYPE_ALSA_SOFTVOL, // Alsa softvol device URI
DEVICEURITYPE_ALSA_PLUG, // Alsa plug device URI
DEVICEURITYPE_ALSA_OTHER, // Alsa domain URI device of unspecified type
DEVICEURITYPE_NOT_ALSA, // Unknown (not ALSA domain)
DEVICEURITYPE_MAXVALUE // Enum count, keep at the end
} DeviceURITypeT;
// CPU endianness assumed in all formats
typedef enum SampleType {
AHL_FORMAT_UNKNOWN = -1, // Unknown
AHL_FORMAT_U8 = 0, // Unsigned 8 bit
AHL_FORMAT_S16, // Signed 16 bit Little Endian
AHL_FORMAT_S24, // Signed 24 bit Little Endian using low three bytes in 32-bit word
AHL_FORMAT_S32, // Signed 32 bit Little Endian
AHL_FORMAT_FLOAT, // Float 32 bit Little Endian, Range -1.0 to 1.0
AHL_FORMAT_FLOAT64, // Float 64 bit Little Endian, Range -1.0 to 1.0
AHL_FORMAT_IEC958, // IEC-958 Little Endian (SPDIF)
AHL_FORMAT_MU_LAW, // Mu-Law
AHL_FORMAT_A_LAW, // A-Law
AHL_FORMAT_IMA_ADPCM, // Ima-ADPCM
AHL_FORMAT_MPEG, // MPEG
AHL_FORMAT_GSM, // GSM
AHL_FORMAT_G723, // G723
AHL_FORMAT_DSD, // Direct stream digital
AHL_FORMAT_MAXVALUE, // Enum count, keep at the end
} SampleTypeT;
typedef struct AudioFormat {
int sampleRate; // Sample rate
int numChannels; // Number of channels
SampleTypeT sampleType; // Sample type
// TODO: Interleaving?
// TODO: Sample sub format?
} AudioFormatT;
typedef struct AlsaDeviceInfo {
int cardNum; // HW card number
int deviceNum; // HW device number
int subDeviceNum; // HW sub device number
} AlsaDeviceInfoT;
typedef enum EndpointSelectionMode {
ENDPOINTSELMODE_AUTO = 0, // Automatic endpoint selection based on config priority
ENDPOINTSELMODE_MANUAL, // Explicit endpoint selection
ENDPOINTSELMODEMAXVALUE, // Enum count, keep at the end
} EndpointSelectionModeT;
typedef struct EndPointInterfaceInfo {
endpointID_t endpointID; // Unique endpoint ID (per type)
EndpointTypeT type; // Source or sink device
char * gsDeviceName; // Unique device card name
char * gsDisplayName; // Application display name
char * gsDeviceURI; // Associated URI
char * gsDeviceDomain; // Device URI domain (e.g. alsa or pulse)
DeviceURITypeT deviceURIType; // Device URI type (includes audio domain information)
char * gsHALAPIName; // HAL associated with the device (for volume control)
char * pRoleName; // Role string identifier (from role config but could be programatically overriden later)
AlsaDeviceInfoT alsaInfo; // ALSA specific device information
AudioFormatT format; // Preferred audio format supported (later could be array of supported formats)
int iVolume; // Storage for current endpoint volume (policy effected).
json_object *pPropTableJ; //Property Table
} EndPointInterfaceInfoT;
typedef struct StreamInterfaceInfo {
streamID_t streamID; // Stream unique ID
StreamStateT streamState; // Stream activity state
StreamMuteT streamMute; // Stream mute state
char * pRoleName; // Role string identifier (from role config but could be programatically overriden later)
int iPriority; // Role normalized priority (0-100) (from role config but could be programatically overriden later)
InterruptBehaviorT eInterruptBehavior; // Role behavior when interrupting lower priority streams (from role config but could be programatically overriden later)
EndPointInterfaceInfoT endpoint;
} StreamInterfaceInfoT;
void Add_Endpoint_Property_Double( json_object * io_pPropertyArray, char * in_pPropertyName, double in_dPropertyValue);
void Add_Endpoint_Property_Int( json_object * io_pPropertyArray, char * in_pPropertyName, int in_iPropertyValue);
void Add_Endpoint_Property_String( json_object * io_pPropertyArray, char * in_pPropertyName, const char * in_pPropertyValue);
int F(EndPointInterfaceInfoT * pEndpoint, json_object **ppEndpointJ);
int JSONToEndpoint(json_object *pEndpointJ, EndPointInterfaceInfoT * pStream);
int StreamToJSON(StreamInterfaceInfoT * pPolicyStream, json_object **ppStreamJ);
int JSONToStream(json_object *pStreamJ, StreamInterfaceInfoT * pPolicyStream);
#endif // AHL_POLICY_UTILS_INCLUDE
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