/* * Copyright (C) 2016 The Android Open Source Project * * 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. */ // // A2DP Codecs API // #ifndef A2DP_CODEC_API_H #define A2DP_CODEC_API_H #include #include #include #include #include #include #include #include #include "a2dp_api.h" #include "audio_a2dp_hw/include/audio_a2dp_hw.h" #include "avdt_api.h" #include "osi/include/time.h" /** * Structure used to initialize the A2DP encoder with A2DP peer information */ typedef struct { bool is_peer_edr; // True if the A2DP peer supports EDR bool peer_supports_3mbps; // True if the A2DP peer supports 3 Mbps EDR uint16_t peer_mtu; // MTU of the A2DP peer } tA2DP_ENCODER_INIT_PEER_PARAMS; class A2dpCodecConfig { friend class A2dpCodecs; public: // Creates a codec entry. The selected codec is defined by |codec_index|, // Returns the codec entry on success, otherwise nullptr. static A2dpCodecConfig* createCodec( btav_a2dp_codec_index_t codec_index, btav_a2dp_codec_priority_t codec_priority = BTAV_A2DP_CODEC_PRIORITY_DEFAULT); virtual ~A2dpCodecConfig() = 0; // Gets the pre-defined codec index. btav_a2dp_codec_index_t codecIndex() const { return codec_index_; } // Gets the codec name. const std::string& name() const { return name_; } // Gets the current priority of the codec. btav_a2dp_codec_priority_t codecPriority() const { return codec_priority_; } // Copies out the current OTA codec config to |p_codec_info|. // Returns true if the current codec config is valid and copied, // otherwise false. bool copyOutOtaCodecConfig(uint8_t* p_codec_info); // Gets the current codec configuration. // Returns a copy of the current codec configuration. btav_a2dp_codec_config_t getCodecConfig(); // Gets the current codec capability. // The capability is computed by intersecting the local codec's capability // and the peer's codec capability. However, if there is an explicit user // configuration for some of the parameters, the result codec configuration // and capability is restricted to the user's configuration choice. // Returns a copy of the current codec capability. btav_a2dp_codec_config_t getCodecCapability(); // Gets the codec local capability. // Returns a copy of the codec local capability. btav_a2dp_codec_config_t getCodecLocalCapability(); // Gets the codec selectable capability. // The capability is computed by intersecting the local codec's capability // and the peer's codec capability. Any explicit user configuration is // not included in the result. // Returns a copy of the codec selectable capability. btav_a2dp_codec_config_t getCodecSelectableCapability(); // Gets the current codec user configuration. // Returns a copy of the current codec user configuration. btav_a2dp_codec_config_t getCodecUserConfig(); // Gets the current codec audio configuration. // Returns a copy of the current codec audio configuration. btav_a2dp_codec_config_t getCodecAudioConfig(); // Gets the number of bits per sample of the current codec configuration, // or 0 if not configured. uint8_t getAudioBitsPerSample(); // Checks whether the codec uses the RTP Header Marker bit (see RFC 6416). // NOTE: Even if the encoded data uses RTP headers, some codecs do not use // the Marker bit - that bit is expected to be set to 0. // Returns true if the encoded data packets have RTP headers, and // the Marker bit in the header is set according to RFC 6416. virtual bool useRtpHeaderMarkerBit() const = 0; // Checks whether |codec_config| is empty and contains no configuration. // Returns true if |codec_config| is empty, otherwise false. static bool isCodecConfigEmpty(const btav_a2dp_codec_config_t& codec_config); protected: // Sets the current priority of the codec to |codec_priority|. // If |codec_priority| is BTAV_A2DP_CODEC_PRIORITY_DEFAULT, the priority is // reset to its default value. void setCodecPriority(btav_a2dp_codec_priority_t codec_priority); // Sets the current priority of the codec to its default value. void setDefaultCodecPriority(); // Sets the A2DP Source-to-Sink codec configuration to be used // with a peer Sink device. // |p_peer_codec_info| is the peer's A2DP Sink codec information // to use. If |is_capability| is true, then |p_peer_codec_info| contains the // peer's A2DP Sink codec capability, otherwise it contains the peer's // preferred A2DP codec configuration to use. // The result codec configuration is stored in |p_result_codec_config|. // See |A2dpCodecs.setCodecConfig| for detailed description of // the actual mechanism used to compute the configuration. // Returns true on success, othewise false. virtual bool setCodecConfig(const uint8_t* p_peer_codec_info, bool is_capability, uint8_t* p_result_codec_config) = 0; // Sets the user prefered codec configuration. // |codec_user_config| contains the preferred codec user configuration. // |codec_audio_config| contains the selected audio feeding configuration. // |p_peer_params| contains the A2DP peer information. // |p_peer_codec_info| is the peer's A2DP Sink codec information // to use. If |is_capability| is true, then |p_peer_codec_info| contains the // peer's A2DP Sink codec capability, otherwise it contains the peer's // preferred A2DP codec configuration to use. // If there is a change in the codec configuration that requires restarting // if the audio input stream, flag |p_restart_input| is set to true. // If there is a change in the encoder configuration that requires restarting // of the A2DP connection, the new codec configuration is stored in // |p_result_codec_config|, and flag |p_restart_output| is set to true. // If there is any change in the codec configuration, flag |p_config_updated| // is set to true. // Returns true on success, otherwise false. virtual bool setCodecUserConfig( const btav_a2dp_codec_config_t& codec_user_config, const btav_a2dp_codec_config_t& codec_audio_config, const tA2DP_ENCODER_INIT_PEER_PARAMS* p_peer_params, const uint8_t* p_peer_codec_info, bool is_capability, uint8_t* p_result_codec_config, bool* p_restart_input, bool* p_restart_output, bool* p_config_updated); // Updates the encoder with the user prefered codec configuration. // |p_peer_params| contains the A2DP peer information. // If there is a change in the encoder configuration that requires restarting // the audio input stream, flag |p_restart_input| is set to true. // If there is a change in the encoder configuration that requires restarting // of the A2DP connection, flag |p_restart_output| is set to true. // If there is any change in the codec configuration, flag |p_config_updated| // is set to true. // Returns true on success, otherwise false. virtual bool updateEncoderUserConfig( const tA2DP_ENCODER_INIT_PEER_PARAMS* p_peer_params, bool* p_restart_input, bool* p_restart_output, bool* p_config_updated) = 0; // Constructor where |codec_index| is the unique index that identifies the // codec. The user-friendly name is |name|. // The default codec priority is |codec_priority|. If the value is // |BTAV_A2DP_CODEC_PRIORITY_DEFAULT|, the codec priority is computed // internally. A2dpCodecConfig(btav_a2dp_codec_index_t codec_index, const std::string& name, btav_a2dp_codec_priority_t codec_priority); // Initializes the codec entry. // Returns true on success, otherwise false. virtual bool init() = 0; // Checks whether the internal state is valid virtual bool isValid() const; // Returns the encoder's periodic interval (in milliseconds). virtual period_ms_t encoderIntervalMs() const = 0; // Checks whether the A2DP Codec Configuration is valid. // Returns true if A2DP Codec Configuration stored in |codec_config| // is valid, otherwise false. static bool codecConfigIsValid(const btav_a2dp_codec_config_t& codec_config); // Gets the string representation of A2DP Codec Configuration. // Returns the string representation of A2DP Codec Configuration stored // in |codec_config|. The format is: // "Rate=44100|48000 Bits=16|24 Mode=MONO|STEREO" static std::string codecConfig2Str( const btav_a2dp_codec_config_t& codec_config); // Gets the string representation of A2DP Codec Sample Rate. // Returns the string representation of A2DP Codec Sample Rate stored // in |codec_sample_rate|. If there are multiple values stored in // |codec_sample_rate|, the return string format is "rate1|rate2|rate3". static std::string codecSampleRate2Str( btav_a2dp_codec_sample_rate_t codec_sample_rate); // Gets the string representation of A2DP Codec Bits Per Sample. // Returns the string representation of A2DP Codec Bits Per Sample stored // in |codec_bits_per_sample|. If there are multiple values stored in // |codec_bits_per_sample|, the return string format is "bits1|bits2|bits3". static std::string codecBitsPerSample2Str( btav_a2dp_codec_bits_per_sample_t codec_bits_per_sample); // Gets the string representation of A2DP Codec Channel Mode. // Returns the string representation of A2DP Channel Mode stored // in |codec_channel_mode|. If there are multiple values stored in // |codec_channel_mode|, the return string format is "mode1|mode2|mode3". static std::string codecChannelMode2Str( btav_a2dp_codec_channel_mode_t codec_channel_mode); // Dumps codec-related information. // The information is written in user-friendly form to file descriptor |fd|. virtual void debug_codec_dump(int fd); std::recursive_mutex codec_mutex_; const btav_a2dp_codec_index_t codec_index_; // The unique codec index const std::string name_; // The codec name btav_a2dp_codec_priority_t codec_priority_; // Codec priority: must be unique btav_a2dp_codec_priority_t default_codec_priority_; btav_a2dp_codec_config_t codec_config_; btav_a2dp_codec_config_t codec_capability_; btav_a2dp_codec_config_t codec_local_capability_; btav_a2dp_codec_config_t codec_selectable_capability_; // The optional user configuration. The values (if set) are used // as a preference when there is a choice. If a particular value // is not supported by the local or remote device, it is ignored. btav_a2dp_codec_config_t codec_user_config_; // The selected audio feeding configuration. btav_a2dp_codec_config_t codec_audio_config_; uint8_t ota_codec_config_[AVDT_CODEC_SIZE]; uint8_t ota_codec_peer_capability_[AVDT_CODEC_SIZE]; uint8_t ota_codec_peer_config_[AVDT_CODEC_SIZE]; }; class A2dpCodecs { public: // Constructor for class |A2dpCodecs|. // |codec_priorities| contains the codec priorities to use. A2dpCodecs(const std::vector& codec_priorities); ~A2dpCodecs(); // Initializes all supported codecs. // Returns true if at least one Source codec and one Sink codec were // initialized, otherwise false. bool init(); // Finds the Source codec that corresponds to the A2DP over-the-air // |p_codec_info| information. // Returns the Source codec if found, otherwise nullptr. A2dpCodecConfig* findSourceCodecConfig(const uint8_t* p_codec_info); // Gets the codec config that is currently selected. // Returns the codec config that is currently selected, or nullptr if // no codec is selected. A2dpCodecConfig* getCurrentCodecConfig() const { return current_codec_config_; } // Gets the list of Source codecs ordered by priority: higher priority first. const std::list orderedSourceCodecs() const { return ordered_source_codecs_; } // Gets the list of Sink codecs ordered by priority: higher priority first. const std::list orderedSinkCodecs() const { return ordered_sink_codecs_; } // Sets the A2DP Source-to-Sink codec configuration to be used // with a peer Sink device. // |p_peer_codec_info| is the peer's A2DP Sink codec information // to use. If |is_capability| is true, then |p_peer_codec_info| contains the // peer's A2DP Sink codec capability, otherwise it contains the peer's // preferred A2DP codec configuration to use. // If the codec can be used and |select_current_codec| is true, then // this codec is selected as the current one. // // The codec configuration is built by considering the optional user // configuration, the local codec capabilities, the peer's codec // capabilities, and the codec's locally-defined default values. // For each codec parameter: // // 1. If it is user-configurable parameter (sample rate, bits per sample, // channel mode, and some codec-specific parameters), // if the user has an explicit preference, and that preference // is supported by both the local and remote device, this is the // parameter value that is used. // 2. Otherwise, if the explicit internal default value is supported // by both the local and remote device, this is the parameter value // that is used. // 3. Otherwise, the best match is chosen among all values supported by // the local and remote device. // // In addition, the codec's internal state is updated to reflect // the capabilities that are advertised to the upstream audio source // (Media Framework) to make run-time audio parameter choices: // 4. If the user-configurable parameter was selected, this is the // only parameter value that is advertised to the Media Framework. // 5. Otherwise, all values supported by both the local and remote // devices are advertised to the Media Framework. // // The result codec configuration is stored in |p_result_codec_config|. // Returns true on success, othewise false. bool setCodecConfig(const uint8_t* p_peer_codec_info, bool is_capability, uint8_t* p_result_codec_config, bool select_current_codec); // Sets the user prefered codec configuration. // |codec_user_config| contains the preferred codec configuration. // |p_peer_params| contains the A2DP peer information. // |p_peer_sink_capabilities| is the peer's A2DP Sink codec capabilities // to use. // If there is a change in the encoder configuration that requires restarting // the audio input stream, flag |p_restart_input| is set to true. // If there is a change in the encoder configuration that requires restarting // of the A2DP connection, flag |p_restart_output| is set to true, and the // new codec is stored in |p_result_codec_config|. // If there is any change in the codec configuration, flag |p_config_updated| // is set to true. // Returns true on success, otherwise false. bool setCodecUserConfig(const btav_a2dp_codec_config_t& codec_user_config, const tA2DP_ENCODER_INIT_PEER_PARAMS* p_peer_params, const uint8_t* p_peer_sink_capabilities, uint8_t* p_result_codec_config, bool* p_restart_input, bool* p_restart_output, bool* p_config_updated); // Sets the Audio HAL selected audio feeding parameters. // Those parameters are applied only to the currently selected codec. // |codec_audio_config| contains the selected audio feeding configuration. // |p_peer_params| contains the A2DP peer information. // |p_peer_sink_capabilities| is the peer's A2DP Sink codec capabilities // to use. // If there is a change in the encoder configuration that requires restarting // of the A2DP connection, flag |p_restart_output| is set to true, and the // new codec is stored in |p_result_codec_config|. // If there is any change in the codec configuration, flag |p_config_updated| // is set to true. // Returns true on success, otherwise false. bool setCodecAudioConfig(const btav_a2dp_codec_config_t& codec_audio_config, const tA2DP_ENCODER_INIT_PEER_PARAMS* p_peer_params, const uint8_t* p_peer_sink_capabilities, uint8_t* p_result_codec_config, bool* p_restart_output, bool* p_config_updated); // Sets the Over-The-Air preferred codec configuration. // The OTA prefered codec configuration is ignored if the current // codec configuration contains explicit user configuration, or if the // codec configuration for the same codec contains explicit user // configuration. // |p_ota_codec_config| contains the received OTA A2DP codec configuration // from the remote peer. Note: this is not the peer codec capability, // but the codec configuration that the peer would like to use. // |p_peer_params| contains the A2DP peer information. // If there is a change in the encoder configuration that requires restarting // the audio input stream, flag |p_restart_input| is set to true. // If there is a change in the encoder configuration that requires restarting // of the A2DP connection, flag |p_restart_output| is set to true, and the // new codec is stored in |p_result_codec_config|. // If there is any change in the codec configuration, flag |p_config_updated| // is set to true. // Returns true on success, otherwise false. bool setCodecOtaConfig(const uint8_t* p_ota_codec_config, const tA2DP_ENCODER_INIT_PEER_PARAMS* p_peer_params, uint8_t* p_result_codec_config, bool* p_restart_input, bool* p_restart_output, bool* p_config_updated); // Gets the current codec configuration and the capabilities of // all configured codecs. // The current codec configuration is stored in |p_codec_config|. // Local device's codecs capabilities are stored in // |p_codecs_local_capabilities|. // The codecs capabilities that can be used between the local device // and the remote device are stored in |p_codecs_selectable_capabilities|. // Returns true on success, otherwise false. bool getCodecConfigAndCapabilities( btav_a2dp_codec_config_t* p_codec_config, std::vector* p_codecs_local_capabilities, std::vector* p_codecs_selectable_capabilities); // Dumps codec-related information. // The information is written in user-friendly form to file descriptor |fd|. void debug_codec_dump(int fd); private: struct CompareBtBdaddr : public std::binary_function { bool operator()(const RawAddress& lhs, const RawAddress& rhs) const { return (memcmp(&lhs, &rhs, sizeof(lhs)) < 0); } }; typedef std::map IndexedCodecs; std::recursive_mutex codec_mutex_; A2dpCodecConfig* current_codec_config_; // Currently selected codec std::map codec_priorities_; IndexedCodecs indexed_codecs_; // The codecs indexed by codec index IndexedCodecs disabled_codecs_; // The disabled codecs // A2DP Source codecs ordered by priority std::list ordered_source_codecs_; // A2DP Sink codecs ordered by priority std::list ordered_sink_codecs_; std::map peer_codecs_; }; /** * Structure used to configure the A2DP feeding. */ typedef struct { tA2DP_SAMPLE_RATE sample_rate; // 44100, 48000, etc tA2DP_BITS_PER_SAMPLE bits_per_sample; // 8, 16, 24, 32 tA2DP_CHANNEL_COUNT channel_count; // 1 for mono or 2 for stereo } tA2DP_FEEDING_PARAMS; // Prototype for a callback to read audio data for encoding. // |p_buf| is the buffer to store the data. |len| is the number of octets to // read. // Returns the number of octets read. typedef uint32_t (*a2dp_source_read_callback_t)(uint8_t* p_buf, uint32_t len); // Prototype for a callback to enqueue A2DP Source packets for transmission. // |p_buf| is the buffer with the audio data to enqueue. The callback is // responsible for freeing |p_buf|. // |frames_n| is the number of audio frames in |p_buf| - it is used for // statistics purpose. // Returns true if the packet was enqueued, otherwise false. typedef bool (*a2dp_source_enqueue_callback_t)(BT_HDR* p_buf, size_t frames_n); // // A2DP encoder callbacks interface. // typedef struct { // Initialize the A2DP encoder. // |p_peer_params| contains the A2DP peer information // The current A2DP codec config is in |a2dp_codec_config|. // |read_callback| is the callback for reading the input audio data. // |enqueue_callback| is the callback for enqueueing the encoded audio data. void (*encoder_init)(const tA2DP_ENCODER_INIT_PEER_PARAMS* p_peer_params, A2dpCodecConfig* a2dp_codec_config, a2dp_source_read_callback_t read_callback, a2dp_source_enqueue_callback_t enqueue_callback); // Cleanup the A2DP encoder. void (*encoder_cleanup)(void); // Reset the feeding for the A2DP encoder. void (*feeding_reset)(void); // Flush the feeding for the A2DP encoder. void (*feeding_flush)(void); // Get the A2DP encoder interval (in milliseconds). period_ms_t (*get_encoder_interval_ms)(void); // Prepare and send A2DP encoded frames. // |timestamp_us| is the current timestamp (in microseconds). void (*send_frames)(uint64_t timestamp_us); // Set transmit queue length for the A2DP encoder. void (*set_transmit_queue_length)(size_t transmit_queue_length); } tA2DP_ENCODER_INTERFACE; // Gets the A2DP codec type. // |p_codec_info| contains information about the codec capabilities. tA2DP_CODEC_TYPE A2DP_GetCodecType(const uint8_t* p_codec_info); // Checks whether the codec capabilities contain a valid A2DP Source codec. // NOTE: only codecs that are implemented are considered valid. // Returns true if |p_codec_info| contains information about a valid codec, // otherwise false. bool A2DP_IsSourceCodecValid(const uint8_t* p_codec_info); // Checks whether the codec capabilities contain a valid A2DP Sink codec. // NOTE: only codecs that are implemented are considered valid. // Returns true if |p_codec_info| contains information about a valid codec, // otherwise false. bool A2DP_IsSinkCodecValid(const uint8_t* p_codec_info); // Checks whether the codec capabilities contain a valid peer A2DP Source // codec. // NOTE: only codecs that are implemented are considered valid. // Returns true if |p_codec_info| contains information about a valid codec, // otherwise false. bool A2DP_IsPeerSourceCodecValid(const uint8_t* p_codec_info); // Checks whether the codec capabilities contain a valid peer A2DP Sink codec. // NOTE: only codecs that are implemented are considered valid. // Returns true if |p_codec_info| contains information about a valid codec, // otherwise false. bool A2DP_IsPeerSinkCodecValid(const uint8_t* p_codec_info); // Checks whether an A2DP Sink codec is supported. // |p_codec_info| contains information about the codec capabilities. // Returns true if the A2DP Sink codec is supported, otherwise false. bool A2DP_IsSinkCodecSupported(const uint8_t* p_codec_info); // Checks whether an A2DP Source codec for a peer Source device is supported. // |p_codec_info| contains information about the codec capabilities of the // peer device. // Returns true if the A2DP Source codec for a peer Source device is supported, // otherwise false. bool A2DP_IsPeerSourceCodecSupported(const uint8_t* p_codec_info); // Initialize state with the default A2DP codec. // The initialized state with the codec capabilities is stored in // |p_codec_info|. void A2DP_InitDefaultCodec(uint8_t* p_codec_info); // Builds A2DP preferred Sink capability from Source capability. // |p_src_cap| is the Source capability to use. // |p_pref_cfg| is the result Sink capability to store. // Returns |A2DP_SUCCESS| on success, otherwise the corresponding A2DP error // status code. tA2DP_STATUS A2DP_BuildSrc2SinkConfig(const uint8_t* p_src_cap, uint8_t* p_pref_cfg); // Checks whether the A2DP data packets should contain RTP header. // |content_protection_enabled| is true if Content Protection is // enabled. |p_codec_info| contains information about the codec capabilities. // Returns true if the A2DP data packets should contain RTP header, otherwise // false. bool A2DP_UsesRtpHeader(bool content_protection_enabled, const uint8_t* p_codec_info); // Gets the |AVDT_MEDIA_TYPE_*| media type from the codec capability // in |p_codec_info|. uint8_t A2DP_GetMediaType(const uint8_t* p_codec_info); // Gets the A2DP codec name for a given |p_codec_info|. const char* A2DP_CodecName(const uint8_t* p_codec_info); // Checks whether two A2DP codecs |p_codec_info_a| and |p_codec_info_b| have // the same type. // Returns true if the two codecs have the same type, otherwise false. // If the codec type is not recognized, the return value is false. bool A2DP_CodecTypeEquals(const uint8_t* p_codec_info_a, const uint8_t* p_codec_info_b); // Checks whether two A2DP codecs p_codec_info_a| and |p_codec_info_b| are // exactly the same. // Returns true if the two codecs are exactly the same, otherwise false. // If the codec type is not recognized, the return value is false. bool A2DP_CodecEquals(const uint8_t* p_codec_info_a, const uint8_t* p_codec_info_b); // Gets the track sample rate value for the A2DP codec. // |p_codec_info| is a pointer to the codec_info to decode. // Returns the track sample rate on success, or -1 if |p_codec_info| // contains invalid codec information. int A2DP_GetTrackSampleRate(const uint8_t* p_codec_info); // Gets the channel count for the A2DP codec. // |p_codec_info| is a pointer to the codec_info to decode. // Returns the channel count on success, or -1 if |p_codec_info| // contains invalid codec information. int A2DP_GetTrackChannelCount(const uint8_t* p_codec_info); // Gets the channel type for the A2DP Sink codec: // 1 for mono, or 3 for dual/stereo/joint. // |p_codec_info| is a pointer to the codec_info to decode. // Returns the channel type on success, or -1 if |p_codec_info| // contains invalid codec information. int A2DP_GetSinkTrackChannelType(const uint8_t* p_codec_info); // Computes the number of frames to process in a time window for the A2DP // Sink codec. |time_interval_ms| is the time interval (in milliseconds). // |p_codec_info| is a pointer to the codec_info to decode. // Returns the number of frames to process on success, or -1 if |p_codec_info| // contains invalid codec information. int A2DP_GetSinkFramesCountToProcess(uint64_t time_interval_ms, const uint8_t* p_codec_info); // Gets the A2DP audio data timestamp from an audio packet. // |p_codec_info| contains the codec information. // |p_data| contains the audio data. // The timestamp is stored in |p_timestamp|. // Returns true on success, otherwise false. bool A2DP_GetPacketTimestamp(const uint8_t* p_codec_info, const uint8_t* p_data, uint32_t* p_timestamp); // Builds A2DP codec header for audio data. // |p_codec_info| contains the codec information. // |p_buf| contains the audio data. // |frames_per_packet| is the number of frames in this packet. // Returns true on success, otherwise false. bool A2DP_BuildCodecHeader(const uint8_t* p_codec_info, BT_HDR* p_buf, uint16_t frames_per_packet); // Gets the A2DP encoder interface that can be used to encode and prepare // A2DP packets for transmission - see |tA2DP_ENCODER_INTERFACE|. // |p_codec_info| contains the codec information. // Returns the A2DP encoder interface if the |p_codec_info| is valid and // supported, otherwise NULL. const tA2DP_ENCODER_INTERFACE* A2DP_GetEncoderInterface( const uint8_t* p_codec_info); // Adjusts the A2DP codec, based on local support and Bluetooth specification. // |p_codec_info| contains the codec information to adjust. // Returns true if |p_codec_info| is valid and supported, otherwise false. bool A2DP_AdjustCodec(uint8_t* p_codec_info); // Gets the A2DP Source codec index for a given |p_codec_info|. // Returns the corresponding |btav_a2dp_codec_index_t| on success, // otherwise |BTAV_A2DP_CODEC_INDEX_MAX|. btav_a2dp_codec_index_t A2DP_SourceCodecIndex(const uint8_t* p_codec_info); // Gets the A2DP codec name for a given |codec_index|. const char* A2DP_CodecIndexStr(btav_a2dp_codec_index_t codec_index); // Initializes A2DP codec-specific information into |tAVDT_CFG| configuration // entry pointed by |p_cfg|. The selected codec is defined by |codec_index|. // Returns true on success, otherwise false. bool A2DP_InitCodecConfig(btav_a2dp_codec_index_t codec_index, tAVDT_CFG* p_cfg); // Decodes and displays A2DP codec info when using |LOG_DEBUG|. // |p_codec_info| is a pointer to the codec_info to decode and display. // Returns true if the codec information is valid, otherwise false. bool A2DP_DumpCodecInfo(const uint8_t* p_codec_info); // Add enum-based flag operators to the btav_a2dp_codec_config_t fields #ifndef DEFINE_ENUM_FLAG_OPERATORS #define DEFINE_ENUM_FLAG_OPERATORS(bitmask) \ extern "C++" { \ inline constexpr bitmask operator&(bitmask X, bitmask Y) { \ return static_cast(static_cast(X) & static_cast(Y)); \ } \ inline constexpr bitmask operator|(bitmask X, bitmask Y) { \ return static_cast(static_cast(X) | static_cast(Y)); \ } \ inline constexpr bitmask operator^(bitmask X, bitmask Y) { \ return static_cast(static_cast(X) ^ static_cast(Y)); \ } \ inline constexpr bitmask operator~(bitmask X) { \ return static_cast(~static_cast(X)); \ } \ inline bitmask& operator&=(bitmask& X, bitmask Y) { \ X = X & Y; \ return X; \ } \ inline bitmask& operator|=(bitmask& X, bitmask Y) { \ X = X | Y; \ return X; \ } \ inline bitmask& operator^=(bitmask& X, bitmask Y) { \ X = X ^ Y; \ return X; \ } \ } #endif // DEFINE_ENUM_FLAG_OPERATORS DEFINE_ENUM_FLAG_OPERATORS(btav_a2dp_codec_sample_rate_t); DEFINE_ENUM_FLAG_OPERATORS(btav_a2dp_codec_bits_per_sample_t); DEFINE_ENUM_FLAG_OPERATORS(btav_a2dp_codec_channel_mode_t); #endif // A2DP_CODEC_API_H