| /* |
| * 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 AAC |
| // |
| |
| #ifndef A2DP_AAC_H |
| #define A2DP_AAC_H |
| |
| #include "a2dp_aac_constants.h" |
| #include "a2dp_codec_api.h" |
| #include "avdt_api.h" |
| |
| class A2dpCodecConfigAacBase : public A2dpCodecConfig { |
| protected: |
| A2dpCodecConfigAacBase(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 A2dpCodecConfigAacSource : public A2dpCodecConfigAacBase { |
| public: |
| A2dpCodecConfigAacSource(btav_a2dp_codec_priority_t codec_priority); |
| virtual ~A2dpCodecConfigAacSource(); |
| |
| 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 A2dpCodecConfigAacSink : public A2dpCodecConfigAacBase { |
| public: |
| A2dpCodecConfigAacSink(btav_a2dp_codec_priority_t codec_priority); |
| virtual ~A2dpCodecConfigAacSink(); |
| |
| 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 AAC Source |
| // codec. |
| // NOTE: only codecs that are implemented are considered valid. |
| // Returns true if |p_codec_info| contains information about a valid AAC |
| // codec, otherwise false. |
| bool A2DP_IsSourceCodecValidAac(const uint8_t* p_codec_info); |
| |
| // Checks whether the codec capabilities contain a valid A2DP AAC Sink codec. |
| // NOTE: only codecs that are implemented are considered valid. |
| // Returns true if |p_codec_info| contains information about a valid AAC codec, |
| // otherwise false. |
| bool A2DP_IsSinkCodecValidAac(const uint8_t* p_codec_info); |
| |
| // Checks whether the codec capabilities contain a valid peer A2DP AAC Source |
| // codec. |
| // NOTE: only codecs that are implemented are considered valid. |
| // Returns true if |p_codec_info| contains information about a valid AAC codec, |
| // otherwise false. |
| bool A2DP_IsPeerSourceCodecValidAac(const uint8_t* p_codec_info); |
| |
| // Checks whether the codec capabilities contain a valid peer A2DP AAC Sink |
| // codec. |
| // NOTE: only codecs that are implemented are considered valid. |
| // Returns true if |p_codec_info| contains information about a valid AAC |
| // codec, otherwise false. |
| bool A2DP_IsPeerSinkCodecValidAac(const uint8_t* p_codec_info); |
| |
| // Checks whether A2DP AAC Sink codec is supported. |
| // |p_codec_info| contains information about the codec capabilities. |
| // Returns true if the A2DP AAC Sink codec is supported, otherwise false. |
| bool A2DP_IsSinkCodecSupportedAac(const uint8_t* p_codec_info); |
| |
| // Checks whether an A2DP AAC 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 AAC Source codec for a peer Source device is |
| // supported, otherwise false. |
| bool A2DP_IsPeerSourceCodecSupportedAac(const uint8_t* p_codec_info); |
| |
| // 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_UsesRtpHeaderAac(bool content_protection_enabled, |
| const uint8_t* p_codec_info); |
| |
| // Gets the A2DP AAC codec name for a given |p_codec_info|. |
| const char* A2DP_CodecNameAac(const uint8_t* p_codec_info); |
| |
| // Checks whether two A2DP AAC 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_CodecTypeEqualsAac(const uint8_t* p_codec_info_a, |
| const uint8_t* p_codec_info_b); |
| |
| // Checks whether two A2DP AAC 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 AAC, the return value is false. |
| bool A2DP_CodecEqualsAac(const uint8_t* p_codec_info_a, |
| const uint8_t* p_codec_info_b); |
| |
| // Gets the track sample rate value for the A2DP AAC codec. |
| // |p_codec_info| is a pointer to the AAC codec_info to decode. |
| // Returns the track sample rate on success, or -1 if |p_codec_info| |
| // contains invalid codec information. |
| int A2DP_GetTrackSampleRateAac(const uint8_t* p_codec_info); |
| |
| // Gets the track bits per sample value for the A2DP AAC codec. |
| // |p_codec_info| is a pointer to the AAC codec_info to decode. |
| // Returns the track bits per sample on success, or -1 if |p_codec_info| |
| // contains invalid codec information. |
| int A2DP_GetTrackBitsPerSampleAac(const uint8_t* p_codec_info); |
| |
| // Gets the channel count for the A2DP AAC codec. |
| // |p_codec_info| is a pointer to the AAC codec_info to decode. |
| // Returns the channel count on success, or -1 if |p_codec_info| |
| // contains invalid codec information. |
| int A2DP_GetTrackChannelCountAac(const uint8_t* p_codec_info); |
| |
| // Gets the channel type for the A2DP AAC Sink codec: |
| // 1 for mono, or 3 for dual/stereo/joint. |
| // |p_codec_info| is a pointer to the AAC codec_info to decode. |
| // Returns the channel type on success, or -1 if |p_codec_info| |
| // contains invalid codec information. |
| int A2DP_GetSinkTrackChannelTypeAac(const uint8_t* p_codec_info); |
| |
| // Gets the object type code for the A2DP AAC codec. |
| // The actual value is codec-specific - see |A2DP_AAC_OBJECT_TYPE_*|. |
| // |p_codec_info| is a pointer to the AAC codec_info to decode. |
| // Returns the object type code on success, or -1 if |p_codec_info| |
| // contains invalid codec information. |
| int A2DP_GetObjectTypeCodeAac(const uint8_t* p_codec_info); |
| |
| // Gets the channel mode code for the A2DP AAC codec. |
| // The actual value is codec-specific - see |A2DP_AAC_CHANNEL_MODE_*|. |
| // |p_codec_info| is a pointer to the AAC codec_info to decode. |
| // Returns the channel mode code on success, or -1 if |p_codec_info| |
| // contains invalid codec information. |
| int A2DP_GetChannelModeCodeAac(const uint8_t* p_codec_info); |
| |
| // Gets the variable bit rate support for the A2DP AAC codec. |
| // The actual value is codec-specific - see |A2DP_AAC_VARIABLE_BIT_RATE_*|. |
| // |p_codec_info| is a pointer to the AAC codec_info to decode. |
| // Returns the variable bit rate support on success, or -1 if |p_codec_info| |
| // contains invalid codec information. |
| int A2DP_GetVariableBitRateSupportAac(const uint8_t* p_codec_info); |
| |
| // Gets the bit rate for the A2DP AAC codec. |
| // The actual value is codec-specific - for AAC it is in bits per second. |
| // |p_codec_info| is a pointer to the AAC codec_info to decode. |
| // Returns the bit rate on success, or -1 if |p_codec_info| |
| // contains invalid codec information. |
| int A2DP_GetBitRateAac(const uint8_t* p_codec_info); |
| |
| // Computes the maximum bit rate for the A2DP AAC codec based on the MTU. |
| // The actual value is codec-specific - for AAC it is in bits per second. |
| // |p_codec_info| is a pointer to the AAC codec_info to decode. |
| // |mtu| is the MTU to use for the computation. |
| // Returns the maximum bit rate on success, or -1 if |p_codec_info| |
| // contains invalid codec information. |
| int A2DP_ComputeMaxBitRateAac(const uint8_t* p_codec_info, uint16_t mtu); |
| |
| // Gets the A2DP AAC 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_GetPacketTimestampAac(const uint8_t* p_codec_info, |
| const uint8_t* p_data, uint32_t* p_timestamp); |
| |
| // Builds A2DP AAC 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_BuildCodecHeaderAac(const uint8_t* p_codec_info, BT_HDR* p_buf, |
| uint16_t frames_per_packet); |
| |
| // Decodes A2DP AAC codec info into a human readable string. |
| // |p_codec_info| is a pointer to the AAC codec_info to decode. |
| // Returns a string describing the codec information. |
| std::string A2DP_CodecInfoStringAac(const uint8_t* p_codec_info); |
| |
| // Gets the A2DP AAC 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 AAC encoder interface if the |p_codec_info| is valid and |
| // supported, otherwise NULL. |
| const tA2DP_ENCODER_INTERFACE* A2DP_GetEncoderInterfaceAac( |
| const uint8_t* p_codec_info); |
| |
| // Gets the current A2DP AAC 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 AAC decoder interface if the |p_codec_info| is valid and |
| // supported, otherwise NULL. |
| const tA2DP_DECODER_INTERFACE* A2DP_GetDecoderInterfaceAac( |
| const uint8_t* p_codec_info); |
| |
| // Adjusts the A2DP AAC 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_AdjustCodecAac(uint8_t* p_codec_info); |
| |
| // Gets the A2DP AAC 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_SourceCodecIndexAac(const uint8_t* p_codec_info); |
| |
| // Gets the A2DP AAC 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_SinkCodecIndexAac(const uint8_t* p_codec_info); |
| |
| // Gets the A2DP AAC Source codec name. |
| const char* A2DP_CodecIndexStrAac(void); |
| |
| // Gets the A2DP AAC Sink codec name. |
| const char* A2DP_CodecIndexStrAacSink(void); |
| |
| // Initializes A2DP AAC Source codec information into |AvdtpSepConfig| |
| // configuration entry pointed by |p_cfg|. |
| bool A2DP_InitCodecConfigAac(AvdtpSepConfig* p_cfg); |
| |
| // Initializes A2DP AAC Sink codec information into |AvdtpSepConfig| |
| // configuration entry pointed by |p_cfg|. |
| bool A2DP_InitCodecConfigAacSink(AvdtpSepConfig* p_cfg); |
| |
| #endif // A2DP_AAC_H |