1 /* 2 * Copyright 2016 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 // 18 // A2DP Codec API for LDAC 19 // 20 21 #ifndef A2DP_VENDOR_LDAC_H 22 #define A2DP_VENDOR_LDAC_H 23 24 #include "a2dp_codec_api.h" 25 #include "a2dp_vendor_ldac_constants.h" 26 #include "avdt_api.h" 27 28 class A2dpCodecConfigLdac : public A2dpCodecConfig { 29 public: 30 A2dpCodecConfigLdac(btav_a2dp_codec_priority_t codec_priority); 31 virtual ~A2dpCodecConfigLdac(); 32 33 bool init() override; 34 period_ms_t encoderIntervalMs() const override; 35 int getEffectiveMtu() const override; 36 bool setCodecConfig(const uint8_t* p_peer_codec_info, bool is_capability, 37 uint8_t* p_result_codec_config) override; 38 bool setPeerCodecCapabilities( 39 const uint8_t* p_peer_codec_capabilities) override; 40 41 private: 42 bool useRtpHeaderMarkerBit() const override; 43 bool updateEncoderUserConfig( 44 const tA2DP_ENCODER_INIT_PEER_PARAMS* p_peer_params, 45 bool* p_restart_input, bool* p_restart_output, 46 bool* p_config_updated) override; 47 void debug_codec_dump(int fd) override; 48 }; 49 50 // Checks whether the codec capabilities contain a valid A2DP LDAC Source 51 // codec. 52 // NOTE: only codecs that are implemented are considered valid. 53 // Returns true if |p_codec_info| contains information about a valid LDAC 54 // codec, otherwise false. 55 bool A2DP_IsVendorSourceCodecValidLdac(const uint8_t* p_codec_info); 56 57 // Checks whether the codec capabilities contain a valid peer A2DP LDAC Sink 58 // codec. 59 // NOTE: only codecs that are implemented are considered valid. 60 // Returns true if |p_codec_info| contains information about a valid LDAC 61 // codec, otherwise false. 62 bool A2DP_IsVendorPeerSinkCodecValidLdac(const uint8_t* p_codec_info); 63 64 // Checks whether the A2DP data packets should contain RTP header. 65 // |content_protection_enabled| is true if Content Protection is 66 // enabled. |p_codec_info| contains information about the codec capabilities. 67 // Returns true if the A2DP data packets should contain RTP header, otherwise 68 // false. 69 bool A2DP_VendorUsesRtpHeaderLdac(bool content_protection_enabled, 70 const uint8_t* p_codec_info); 71 72 // Gets the A2DP LDAC codec name for a given |p_codec_info|. 73 const char* A2DP_VendorCodecNameLdac(const uint8_t* p_codec_info); 74 75 // Checks whether two A2DP LDAC codecs |p_codec_info_a| and |p_codec_info_b| 76 // have the same type. 77 // Returns true if the two codecs have the same type, otherwise false. 78 bool A2DP_VendorCodecTypeEqualsLdac(const uint8_t* p_codec_info_a, 79 const uint8_t* p_codec_info_b); 80 81 // Checks whether two A2DP LDAC codecs |p_codec_info_a| and |p_codec_info_b| 82 // are exactly the same. 83 // Returns true if the two codecs are exactly the same, otherwise false. 84 // If the codec type is not LDAC, the return value is false. 85 bool A2DP_VendorCodecEqualsLdac(const uint8_t* p_codec_info_a, 86 const uint8_t* p_codec_info_b); 87 88 // Gets the track sample rate value for the A2DP LDAC codec. 89 // |p_codec_info| is a pointer to the LDAC codec_info to decode. 90 // Returns the track sample rate on success, or -1 if |p_codec_info| 91 // contains invalid codec information. 92 int A2DP_VendorGetTrackSampleRateLdac(const uint8_t* p_codec_info); 93 94 // Gets the track bitrate value for the A2DP LDAC codec. 95 // |p_codec_info| is a pointer to the LDAC codec_info to decode. 96 // Returns the track sample rate on success, or -1 if |p_codec_info| 97 // contains invalid codec information. 98 int A2DP_VendorGetBitRateLdac(const uint8_t* p_codec_info); 99 100 // Gets the channel count for the A2DP LDAC codec. 101 // |p_codec_info| is a pointer to the LDAC codec_info to decode. 102 // Returns the channel count on success, or -1 if |p_codec_info| 103 // contains invalid codec information. 104 int A2DP_VendorGetTrackChannelCountLdac(const uint8_t* p_codec_info); 105 106 // Gets the channel mode code for the A2DP LDAC codec. 107 // The actual value is codec-specific - see |A2DP_LDAC_CHANNEL_MODE_*|. 108 // |p_codec_info| is a pointer to the LDAC codec_info to decode. 109 // Returns the channel mode code on success, or -1 if |p_codec_info| 110 // contains invalid codec information. 111 int A2DP_VendorGetChannelModeCodeLdac(const uint8_t* p_codec_info); 112 113 // Gets the A2DP LDAC audio data timestamp from an audio packet. 114 // |p_codec_info| contains the codec information. 115 // |p_data| contains the audio data. 116 // The timestamp is stored in |p_timestamp|. 117 // Returns true on success, otherwise false. 118 bool A2DP_VendorGetPacketTimestampLdac(const uint8_t* p_codec_info, 119 const uint8_t* p_data, 120 uint32_t* p_timestamp); 121 122 // Builds A2DP LDAC codec header for audio data. 123 // |p_codec_info| contains the codec information. 124 // |p_buf| contains the audio data. 125 // |frames_per_packet| is the number of frames in this packet. 126 // Returns true on success, otherwise false. 127 bool A2DP_VendorBuildCodecHeaderLdac(const uint8_t* p_codec_info, BT_HDR* p_buf, 128 uint16_t frames_per_packet); 129 130 // Decodes A2DP LDAC codec info into a human readable string. 131 // |p_codec_info| is a pointer to the LDAC codec_info to decode. 132 // Returns a string describing the codec information. 133 std::string A2DP_VendorCodecInfoStringLdac(const uint8_t* p_codec_info); 134 135 // Gets the A2DP LDAC encoder interface that can be used to encode and prepare 136 // A2DP packets for transmission - see |tA2DP_ENCODER_INTERFACE|. 137 // |p_codec_info| contains the codec information. 138 // Returns the A2DP LDAC encoder interface if the |p_codec_info| is valid and 139 // supported, otherwise NULL. 140 const tA2DP_ENCODER_INTERFACE* A2DP_VendorGetEncoderInterfaceLdac( 141 const uint8_t* p_codec_info); 142 143 // Adjusts the A2DP LDAC codec, based on local support and Bluetooth 144 // specification. 145 // |p_codec_info| contains the codec information to adjust. 146 // Returns true if |p_codec_info| is valid and supported, otherwise false. 147 bool A2DP_VendorAdjustCodecLdac(uint8_t* p_codec_info); 148 149 // Gets the A2DP LDAC Source codec index for a given |p_codec_info|. 150 // Returns the corresponding |btav_a2dp_codec_index_t| on success, 151 // otherwise |BTAV_A2DP_CODEC_INDEX_MAX|. 152 btav_a2dp_codec_index_t A2DP_VendorSourceCodecIndexLdac( 153 const uint8_t* p_codec_info); 154 155 // Gets the A2DP LDAC Source codec name. 156 const char* A2DP_VendorCodecIndexStrLdac(void); 157 158 // Initializes A2DP LDAC Source codec information into |AvdtpSepConfig| 159 // configuration entry pointed by |p_cfg|. 160 bool A2DP_VendorInitCodecConfigLdac(AvdtpSepConfig* p_cfg); 161 162 #endif // A2DP_VENDOR_LDAC_H 163
