| /* |
| * Copyright 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 Codec API for low complexity subband codec (SBC) |
| // |
| |
| #ifndef A2DP_SBC_H |
| #define A2DP_SBC_H |
| |
| #include "a2dp_codec_api.h" |
| #include "a2dp_sbc_constants.h" |
| #include "avdt_api.h" |
| |
| class A2dpCodecConfigSbcBase : public A2dpCodecConfig { |
| protected: |
| A2dpCodecConfigSbcBase(btav_a2dp_codec_index_t codec_index, |
| const std::string& name, |
| btav_a2dp_codec_priority_t codec_priority, |
| bool is_source) |
| : A2dpCodecConfig(codec_index, name, codec_priority), |
| is_source_(is_source) {} |
| bool setCodecConfig(const uint8_t* p_peer_codec_info, bool is_capability, |
| uint8_t* p_result_codec_config) override; |
| bool setPeerCodecCapabilities( |
| const uint8_t* p_peer_codec_capabilities) override; |
| |
| private: |
| bool is_source_; // True if local is Source |
| }; |
| |
| class A2dpCodecConfigSbcSource : public A2dpCodecConfigSbcBase { |
| public: |
| A2dpCodecConfigSbcSource(btav_a2dp_codec_priority_t codec_priority); |
| virtual ~A2dpCodecConfigSbcSource(); |
| |
| bool init() override; |
| uint64_t encoderIntervalMs() const override; |
| int getEffectiveMtu() const override; |
| |
| private: |
| bool useRtpHeaderMarkerBit() const override; |
| bool updateEncoderUserConfig( |
| const tA2DP_ENCODER_INIT_PEER_PARAMS* p_peer_params, |
| bool* p_restart_input, bool* p_restart_output, |
| bool* p_config_updated) override; |
| void debug_codec_dump(int fd) override; |
| }; |
| |
| class A2dpCodecConfigSbcSink : public A2dpCodecConfigSbcBase { |
| public: |
| A2dpCodecConfigSbcSink(btav_a2dp_codec_priority_t codec_priority); |
| virtual ~A2dpCodecConfigSbcSink(); |
| |
| bool init() override; |
| uint64_t encoderIntervalMs() const override; |
| int getEffectiveMtu() const override; |
| |
| private: |
| bool useRtpHeaderMarkerBit() const override; |
| bool updateEncoderUserConfig( |
| const tA2DP_ENCODER_INIT_PEER_PARAMS* p_peer_params, |
| bool* p_restart_input, bool* p_restart_output, |
| bool* p_config_updated) override; |
| }; |
| |
| // Checks whether the codec capabilities contain a valid A2DP SBC Source codec. |
| // NOTE: only codecs that are implemented are considered valid. |
| // Returns true if |p_codec_info| contains information about a valid SBC codec, |
| // otherwise false. |
| bool A2DP_IsSourceCodecValidSbc(const uint8_t* p_codec_info); |
| |
| // Checks whether the codec capabilities contain a valid A2DP SBC Sink codec. |
| // NOTE: only codecs that are implemented are considered valid. |
| // Returns true if |p_codec_info| contains information about a valid SBC codec, |
| // otherwise false. |
| bool A2DP_IsSinkCodecValidSbc(const uint8_t* p_codec_info); |
| |
| // Checks whether the codec capabilities contain a valid peer A2DP SBC Source |
| // codec. |
| // NOTE: only codecs that are implemented are considered valid. |
| // Returns true if |p_codec_info| contains information about a valid SBC codec, |
| // otherwise false. |
| bool A2DP_IsPeerSourceCodecValidSbc(const uint8_t* p_codec_info); |
| |
| // Checks whether the codec capabilities contain a valid peer A2DP SBC Sink |
| // codec. |
| // NOTE: only codecs that are implemented are considered valid. |
| // Returns true if |p_codec_info| contains information about a valid SBC codec, |
| // otherwise false. |
| bool A2DP_IsPeerSinkCodecValidSbc(const uint8_t* p_codec_info); |
| |
| // Checks whether A2DP SBC Sink codec is supported. |
| // |p_codec_info| contains information about the codec capabilities. |
| // Returns true if the A2DP SBC Sink codec is supported, otherwise false. |
| bool A2DP_IsSinkCodecSupportedSbc(const uint8_t* p_codec_info); |
| |
| // Checks whether an A2DP SBC 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 SBC Source codec for a peer Source device is |
| // supported, otherwise false. |
| bool A2DP_IsPeerSourceCodecSupportedSbc(const uint8_t* p_codec_info); |
| |
| // Initialize state with the default A2DP SBC codec. |
| // The initialized state with the codec capabilities is stored in |
| // |p_codec_info|. |
| void A2DP_InitDefaultCodecSbc(uint8_t* p_codec_info); |
| |
| // Gets the A2DP SBC codec name for a given |p_codec_info|. |
| const char* A2DP_CodecNameSbc(const uint8_t* p_codec_info); |
| |
| // Checks whether two A2DP SBC 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. |
| bool A2DP_CodecTypeEqualsSbc(const uint8_t* p_codec_info_a, |
| const uint8_t* p_codec_info_b); |
| |
| // Checks whether two A2DP SBC 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 SBC, the return value is false. |
| bool A2DP_CodecEqualsSbc(const uint8_t* p_codec_info_a, |
| const uint8_t* p_codec_info_b); |
| |
| // Gets the track sample rate value for the A2DP SBC codec. |
| // |p_codec_info| is a pointer to the SBC codec_info to decode. |
| // Returns the track sample rate on success, or -1 if |p_codec_info| |
| // contains invalid codec information. |
| int A2DP_GetTrackSampleRateSbc(const uint8_t* p_codec_info); |
| |
| // Gets the track bits per sample value for the A2DP SBC codec. |
| // |p_codec_info| is a pointer to the SBC codec_info to decode. |
| // Returns the track bits per sample on success, or -1 if |p_codec_info| |
| // contains invalid codec information. |
| int A2DP_GetTrackBitsPerSampleSbc(const uint8_t* p_codec_info); |
| |
| // Gets the channel count for the A2DP SBC codec. |
| // |p_codec_info| is a pointer to the SBC codec_info to decode. |
| // Returns the channel count on success, or -1 if |p_codec_info| |
| // contains invalid codec information. |
| int A2DP_GetTrackChannelCountSbc(const uint8_t* p_codec_info); |
| |
| // Gets the number of subbands for the A2DP SBC codec. |
| // |p_codec_info| is a pointer to the SBC codec_info to decode. |
| // Returns the number of subbands on success, or -1 if |p_codec_info| |
| // contains invalid codec information. |
| int A2DP_GetNumberOfSubbandsSbc(const uint8_t* p_codec_info); |
| |
| // Gets the number of blocks for the A2DP SBC codec. |
| // |p_codec_info| is a pointer to the SBC codec_info to decode. |
| // Returns the number of blocks on success, or -1 if |p_codec_info| |
| // contains invalid codec information. |
| int A2DP_GetNumberOfBlocksSbc(const uint8_t* p_codec_info); |
| |
| // Gets the allocation method code for the A2DP SBC codec. |
| // The actual value is codec-specific - see |A2DP_SBC_IE_ALLOC_MD_*|. |
| // |p_codec_info| is a pointer to the SBC codec_info to decode. |
| // Returns the allocation method code on success, or -1 if |p_codec_info| |
| // contains invalid codec information. |
| int A2DP_GetAllocationMethodCodeSbc(const uint8_t* p_codec_info); |
| |
| // Gets the channel mode code for the A2DP SBC codec. |
| // The actual value is codec-specific - see |A2DP_SBC_IE_CH_MD_*|. |
| // |p_codec_info| is a pointer to the SBC codec_info to decode. |
| // Returns the channel mode code on success, or -1 if |p_codec_info| |
| // contains invalid codec information. |
| int A2DP_GetChannelModeCodeSbc(const uint8_t* p_codec_info); |
| |
| // Gets the sampling frequency code for the A2DP SBC codec. |
| // The actual value is codec-specific - see |A2DP_SBC_IE_SAMP_FREQ_*|. |
| // |p_codec_info| is a pointer to the SBC codec_info to decode. |
| // Returns the sampling frequency code on success, or -1 if |p_codec_info| |
| // contains invalid codec information. |
| int A2DP_GetSamplingFrequencyCodeSbc(const uint8_t* p_codec_info); |
| |
| // Gets the minimum bitpool for the A2DP SBC codec. |
| // The actual value is codec-specific - see |A2DP_SBC_IE_MIN_BITPOOL|. |
| // |p_codec_info| is a pointer to the SBC codec_info to decode. |
| // Returns the minimum bitpool on success, or -1 if |p_codec_info| |
| // contains invalid codec information. |
| int A2DP_GetMinBitpoolSbc(const uint8_t* p_codec_info); |
| |
| // Gets the maximum bitpool for the A2DP SBC codec. |
| // The actual value is codec-specific - see |A2DP_SBC_IE_MAX_BITPOOL|. |
| // |p_codec_info| is a pointer to the SBC codec_info to decode. |
| // Returns the maximum bitpool on success, or -1 if |p_codec_info| |
| // contains invalid codec information. |
| int A2DP_GetMaxBitpoolSbc(const uint8_t* p_codec_info); |
| |
| // Gets the channel type for the A2DP SBC Sink codec: |
| // 1 for mono, or 3 for dual/stereo/joint. |
| // |p_codec_info| is a pointer to the SBC codec_info to decode. |
| // Returns the channel type on success, or -1 if |p_codec_info| |
| // contains invalid codec information. |
| int A2DP_GetSinkTrackChannelTypeSbc(const uint8_t* p_codec_info); |
| |
| // Gets the A2DP SBC 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_GetPacketTimestampSbc(const uint8_t* p_codec_info, |
| const uint8_t* p_data, uint32_t* p_timestamp); |
| |
| // Builds A2DP SBC 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_BuildCodecHeaderSbc(const uint8_t* p_codec_info, BT_HDR* p_buf, |
| uint16_t frames_per_packet); |
| |
| // Decodes A2DP SBC codec info into a human readable string. |
| // |p_codec_info| is a pointer to the SBC codec_info to decode. |
| // Returns a string describing the codec information. |
| std::string A2DP_CodecInfoStringSbc(const uint8_t* p_codec_info); |
| |
| // Gets the A2DP SBC 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 SBC encoder interface if the |p_codec_info| is valid and |
| // supported, otherwise NULL. |
| const tA2DP_ENCODER_INTERFACE* A2DP_GetEncoderInterfaceSbc( |
| const uint8_t* p_codec_info); |
| |
| // Gets the A2DP SBC decoder interface that can be used to decode received A2DP |
| // packets - see |tA2DP_DECODER_INTERFACE|. |
| // |p_codec_info| contains the codec information. |
| // Returns the A2DP SBC decoder interface if the |p_codec_info| is valid and |
| // supported, otherwise NULL. |
| const tA2DP_DECODER_INTERFACE* A2DP_GetDecoderInterfaceSbc( |
| const uint8_t* p_codec_info); |
| |
| // Adjusts the A2DP SBC 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_AdjustCodecSbc(uint8_t* p_codec_info); |
| |
| // Gets the A2DP SBC 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_SourceCodecIndexSbc(const uint8_t* p_codec_info); |
| |
| // Gets the A2DP SBC Sink 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_SinkCodecIndexSbc(const uint8_t* p_codec_info); |
| |
| // Gets the A2DP SBC Source codec name. |
| const char* A2DP_CodecIndexStrSbc(void); |
| |
| // Gets the A2DP SBC Sink codec name. |
| const char* A2DP_CodecIndexStrSbcSink(void); |
| |
| // Initializes A2DP SBC Source codec information into |AvdtpSepConfig| |
| // configuration entry pointed by |p_cfg|. |
| bool A2DP_InitCodecConfigSbc(AvdtpSepConfig* p_cfg); |
| |
| // Initializes A2DP SBC Sink codec information into |AvdtpSepConfig| |
| // configuration entry pointed by |p_cfg|. |
| bool A2DP_InitCodecConfigSbcSink(AvdtpSepConfig* p_cfg); |
| |
| // Get SBC bitrate |
| // Returns |uint32_t| bitrate value in bits per second |
| uint32_t A2DP_GetBitrateSbc(); |
| |
| #endif // A2DP_SBC_H |