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 "a2dp_codec_api.h" 25#include "a2dp_vendor_aptx_constants.h" 26#include "avdt_api.h" 27 28class A2dpCodecConfigAptx : public A2dpCodecConfig { 29 public: 30 A2dpCodecConfigAptx(btav_a2dp_codec_priority_t codec_priority); 31 virtual ~A2dpCodecConfigAptx(); 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 aptX 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 aptX 54// codec, otherwise false. 55bool A2DP_IsVendorSourceCodecValidAptx(const uint8_t* p_codec_info); 56 57// Checks whether the codec capabilities contain a valid peer A2DP aptX 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 aptX 61// codec, otherwise false. 62bool A2DP_IsVendorPeerSinkCodecValidAptx(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. 69bool A2DP_VendorUsesRtpHeaderAptx(bool content_protection_enabled, 70 const uint8_t* p_codec_info); 71 72// Gets the A2DP aptX codec name for a given |p_codec_info|. 73const char* A2DP_VendorCodecNameAptx(const uint8_t* p_codec_info); 74 75// Checks whether two A2DP aptX 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. 78bool A2DP_VendorCodecTypeEqualsAptx(const uint8_t* p_codec_info_a, 79 const uint8_t* p_codec_info_b); 80 81// Checks whether two A2DP aptX 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 aptX, the return value is false. 85bool A2DP_VendorCodecEqualsAptx(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 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. 92int A2DP_VendorGetTrackSampleRateAptx(const uint8_t* p_codec_info); 93 94// Gets the track bitrate value for the A2DP aptX codec. 95// |p_codec_info| is a pointer to the aptX codec_info to decode. 96// Returns the track sample rate on success, or -1 if |p_codec_info| 97// contains invalid codec information. 98int A2DP_VendorGetBitRateAptx(const uint8_t* p_codec_info); 99 100// Gets the channel count for the A2DP aptX codec. 101// |p_codec_info| is a pointer to the aptX codec_info to decode. 102// Returns the channel count on success, or -1 if |p_codec_info| 103// contains invalid codec information. 104int A2DP_VendorGetTrackChannelCountAptx(const uint8_t* p_codec_info); 105 106// Gets the A2DP aptX audio data timestamp from an audio packet. 107// |p_codec_info| contains the codec information. 108// |p_data| contains the audio data. 109// The timestamp is stored in |p_timestamp|. 110// Returns true on success, otherwise false. 111bool A2DP_VendorGetPacketTimestampAptx(const uint8_t* p_codec_info, 112 const uint8_t* p_data, 113 uint32_t* p_timestamp); 114 115// Builds A2DP aptX codec header for audio data. 116// |p_codec_info| contains the codec information. 117// |p_buf| contains the audio data. 118// |frames_per_packet| is the number of frames in this packet. 119// Returns true on success, otherwise false. 120bool A2DP_VendorBuildCodecHeaderAptx(const uint8_t* p_codec_info, BT_HDR* p_buf, 121 uint16_t frames_per_packet); 122 123// Decodes A2DP aptX codec info into a human readable string. 124// |p_codec_info| is a pointer to the aptX codec_info to decode. 125// Returns a string describing the codec information. 126std::string A2DP_VendorCodecInfoStringAptx(const uint8_t* p_codec_info); 127 128// Gets the A2DP aptX encoder interface that can be used to encode and prepare 129// A2DP packets for transmission - see |tA2DP_ENCODER_INTERFACE|. 130// |p_codec_info| contains the codec information. 131// Returns the A2DP aptX encoder interface if the |p_codec_info| is valid and 132// supported, otherwise NULL. 133const tA2DP_ENCODER_INTERFACE* A2DP_VendorGetEncoderInterfaceAptx( 134 const uint8_t* p_codec_info); 135 136// Adjusts the A2DP aptX codec, based on local support and Bluetooth 137// specification. 138// |p_codec_info| contains the codec information to adjust. 139// Returns true if |p_codec_info| is valid and supported, otherwise false. 140bool A2DP_VendorAdjustCodecAptx(uint8_t* p_codec_info); 141 142// Gets the A2DP aptX Source codec index for a given |p_codec_info|. 143// Returns the corresponding |btav_a2dp_codec_index_t| on success, 144// otherwise |BTAV_A2DP_CODEC_INDEX_MAX|. 145btav_a2dp_codec_index_t A2DP_VendorSourceCodecIndexAptx( 146 const uint8_t* p_codec_info); 147 148// Gets the A2DP aptX Source codec name. 149const char* A2DP_VendorCodecIndexStrAptx(void); 150 151// Initializes A2DP aptX Source codec information into |AvdtpSepConfig| 152// configuration entry pointed by |p_cfg|. 153bool A2DP_VendorInitCodecConfigAptx(AvdtpSepConfig* p_cfg); 154 155#endif // A2DP_VENDOR_APTX_H 156