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 aptX 19 // 20 21 #ifndef A2DP_VENDOR_APTX_H 22 #define A2DP_VENDOR_APTX_H 23 24 #include <stddef.h> 25 #include <stdint.h> 26 27 #include "a2dp_codec_api.h" 28 #include "a2dp_vendor_aptx_constants.h" 29 #include "avdt_api.h" 30 #include "internal_include/bt_target.h" 31 #include "stack/include/bt_hdr.h" 32 33 class A2dpCodecConfigAptx : public A2dpCodecConfig { 34 public: 35 A2dpCodecConfigAptx(btav_a2dp_codec_priority_t codec_priority); 36 virtual ~A2dpCodecConfigAptx(); 37 38 bool init() override; 39 tA2DP_STATUS setCodecConfig(const uint8_t* p_peer_codec_info, bool is_capability, 40 uint8_t* p_result_codec_config) override; 41 bool setPeerCodecCapabilities(const uint8_t* p_peer_codec_capabilities) override; 42 43 private: 44 bool useRtpHeaderMarkerBit() const override; 45 void debug_codec_dump(int fd) override; 46 }; 47 48 // Checks whether the codec capabilities contain a valid A2DP aptX Source 49 // codec. 50 // NOTE: only codecs that are implemented are considered valid. 51 // Returns true if |p_codec_info| contains information about a valid aptX 52 // codec, otherwise false. 53 bool A2DP_IsCodecValidAptx(const uint8_t* p_codec_info); 54 55 // Checks whether the A2DP data packets should contain RTP header. 56 // |content_protection_enabled| is true if Content Protection is 57 // enabled. |p_codec_info| contains information about the codec capabilities. 58 // Returns true if the A2DP data packets should contain RTP header, otherwise 59 // false. 60 bool A2DP_VendorUsesRtpHeaderAptx(bool content_protection_enabled, const uint8_t* p_codec_info); 61 62 // Gets the A2DP aptX codec name for a given |p_codec_info|. 63 const char* A2DP_VendorCodecNameAptx(const uint8_t* p_codec_info); 64 65 // Checks whether two A2DP aptX codecs |p_codec_info_a| and |p_codec_info_b| 66 // have the same type. 67 // Returns true if the two codecs have the same type, otherwise false. 68 bool A2DP_VendorCodecTypeEqualsAptx(const uint8_t* p_codec_info_a, const uint8_t* p_codec_info_b); 69 70 // Checks whether two A2DP aptX codecs |p_codec_info_a| and |p_codec_info_b| 71 // are exactly the same. 72 // Returns true if the two codecs are exactly the same, otherwise false. 73 // If the codec type is not aptX, the return value is false. 74 bool A2DP_VendorCodecEqualsAptx(const uint8_t* p_codec_info_a, const uint8_t* p_codec_info_b); 75 76 // Gets the track sample rate value for the A2DP aptX codec. 77 // |p_codec_info| is a pointer to the aptX codec_info to decode. 78 // Returns the track sample rate on success, or -1 if |p_codec_info| 79 // contains invalid codec information. 80 int A2DP_VendorGetTrackSampleRateAptx(const uint8_t* p_codec_info); 81 82 // Gets the track bits per sample value for the A2DP aptX codec. 83 // |p_codec_info| is a pointer to the aptX codec_info to decode. 84 // Returns the track bits per sample on success, or -1 if |p_codec_info| 85 // contains invalid codec information. 86 int A2DP_VendorGetTrackBitsPerSampleAptx(const uint8_t* p_codec_info); 87 88 // Gets the track bitrate value for the A2DP aptX codec. 89 // |p_codec_info| is a pointer to the aptX 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_VendorGetBitRateAptx(const uint8_t* p_codec_info); 93 94 // Gets the channel count for the A2DP aptX codec. 95 // |p_codec_info| is a pointer to the aptX codec_info to decode. 96 // Returns the channel count on success, or -1 if |p_codec_info| 97 // contains invalid codec information. 98 int A2DP_VendorGetTrackChannelCountAptx(const uint8_t* p_codec_info); 99 100 // Gets the A2DP aptX audio data timestamp from an audio packet. 101 // |p_codec_info| contains the codec information. 102 // |p_data| contains the audio data. 103 // The timestamp is stored in |p_timestamp|. 104 // Returns true on success, otherwise false. 105 bool A2DP_VendorGetPacketTimestampAptx(const uint8_t* p_codec_info, const uint8_t* p_data, 106 uint32_t* p_timestamp); 107 108 // Builds A2DP aptX codec header for audio data. 109 // |p_codec_info| contains the codec information. 110 // |p_buf| contains the audio data. 111 // |frames_per_packet| is the number of frames in this packet. 112 // Returns true on success, otherwise false. 113 bool A2DP_VendorBuildCodecHeaderAptx(const uint8_t* p_codec_info, BT_HDR* p_buf, 114 uint16_t frames_per_packet); 115 116 // Decodes A2DP aptX codec info into a human readable string. 117 // |p_codec_info| is a pointer to the aptX codec_info to decode. 118 // Returns a string describing the codec information. 119 std::string A2DP_VendorCodecInfoStringAptx(const uint8_t* p_codec_info); 120 121 // Gets the A2DP aptX encoder interface that can be used to encode and prepare 122 // A2DP packets for transmission - see |tA2DP_ENCODER_INTERFACE|. 123 // |p_codec_info| contains the codec information. 124 // Returns the A2DP aptX encoder interface if the |p_codec_info| is valid and 125 // supported, otherwise NULL. 126 const tA2DP_ENCODER_INTERFACE* A2DP_VendorGetEncoderInterfaceAptx(const uint8_t* p_codec_info); 127 128 // Adjusts the A2DP aptX codec, based on local support and Bluetooth 129 // specification. 130 // |p_codec_info| contains the codec information to adjust. 131 // Returns true if |p_codec_info| is valid and supported, otherwise false. 132 bool A2DP_VendorAdjustCodecAptx(uint8_t* p_codec_info); 133 134 // Gets the A2DP aptX Source codec index for a given |p_codec_info|. 135 // Returns the corresponding |btav_a2dp_codec_index_t| on success, 136 // otherwise |BTAV_A2DP_CODEC_INDEX_MAX|. 137 btav_a2dp_codec_index_t A2DP_VendorSourceCodecIndexAptx(const uint8_t* p_codec_info); 138 139 // Gets the A2DP aptX Source codec name. 140 const char* A2DP_VendorCodecIndexStrAptx(void); 141 142 // Initializes A2DP aptX Source codec information into |AvdtpSepConfig| 143 // configuration entry pointed by |p_cfg|. 144 bool A2DP_VendorInitCodecConfigAptx(AvdtpSepConfig* p_cfg); 145 146 #endif // A2DP_VENDOR_APTX_H 147