1 /* 2 * Copyright (C) 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 // Vendor Specific A2DP Codecs Support 19 // 20 21 #ifndef A2DP_VENDOR_H 22 #define A2DP_VENDOR_H 23 24 #include <stdbool.h> 25 #include "a2dp_codec_api.h" 26 27 /* Offset for A2DP vendor codec */ 28 #define A2DP_VENDOR_CODEC_START_IDX 3 29 30 /* Offset for Vendor ID for A2DP vendor codec */ 31 #define A2DP_VENDOR_CODEC_VENDOR_ID_START_IDX A2DP_VENDOR_CODEC_START_IDX 32 33 /* Offset for Codec ID for A2DP vendor codec */ 34 #define A2DP_VENDOR_CODEC_CODEC_ID_START_IDX \ 35 (A2DP_VENDOR_CODEC_VENDOR_ID_START_IDX + sizeof(uint32_t)) 36 37 // Checks whether the codec capabilities contain a valid A2DP vendor-specific 38 // Source codec. 39 // NOTE: only codecs that are implemented are considered valid. 40 // Returns true if |p_codec_info| contains information about a valid 41 // vendor-specific codec, otherwise false. 42 bool A2DP_IsVendorSourceCodecValid(const uint8_t* p_codec_info); 43 44 // Checks whether the codec capabilities contain a valid A2DP vendor-specific 45 // Sink codec. 46 // NOTE: only codecs that are implemented are considered valid. 47 // Returns true if |p_codec_info| contains information about a valid 48 // vendor-specific codec, otherwise false. 49 bool A2DP_IsVendorSinkCodecValid(const uint8_t* p_codec_info); 50 51 // Checks whether the codec capabilities contain a valid peer A2DP 52 // vendor-specific Source codec. 53 // NOTE: only codecs that are implemented are considered valid. 54 // Returns true if |p_codec_info| contains information about a valid 55 // vendor-specific codec, otherwise false. 56 bool A2DP_IsVendorPeerSourceCodecValid(const uint8_t* p_codec_info); 57 58 // Checks whether the codec capabilities contain a valid peer A2DP 59 // vendor-specific Sink codec. 60 // NOTE: only codecs that are implemented are considered valid. 61 // Returns true if |p_codec_info| contains information about a valid 62 // vendor-specific codec, otherwise false. 63 bool A2DP_IsVendorPeerSinkCodecValid(const uint8_t* p_codec_info); 64 65 // Checks whether a vendor-specific A2DP Sink codec is supported. 66 // |p_codec_info| contains information about the codec capabilities. 67 // Returns true if the vendor-specific A2DP Sink codec is supported, 68 // otherwise false. 69 bool A2DP_IsVendorSinkCodecSupported(const uint8_t* p_codec_info); 70 71 // Checks whether a vendor-specific A2DP Source codec for a peer Source device 72 // is supported. 73 // |p_codec_info| contains information about the codec capabilities of the 74 // peer device. 75 // Returns true if the vendor-specific A2DP Source codec for a peer Source 76 // device is supported, otherwise false. 77 bool A2DP_IsVendorPeerSourceCodecSupported(const uint8_t* p_codec_info); 78 79 // Builds a vendor-specific A2DP preferred Sink capability from a vendor 80 // Source capability. 81 // |p_src_cap| is the Source capability to use. 82 // |p_pref_cfg| is the result Sink capability to store. 83 // Returns |A2DP_SUCCESS| on success, otherwise the corresponding A2DP error 84 // status code. 85 tA2DP_STATUS A2DP_VendorBuildSrc2SinkConfig(const uint8_t* p_src_cap, 86 uint8_t* p_pref_cfg); 87 88 // Gets the Vendor ID for the vendor-specific A2DP codec. 89 // |p_codec_info| contains information about the codec capabilities. 90 // Returns the Vendor ID for the vendor-specific A2DP codec. 91 uint32_t A2DP_VendorCodecGetVendorId(const uint8_t* p_codec_info); 92 93 // Gets the Codec ID for the vendor-specific A2DP codec. 94 // |p_codec_info| contains information about the codec capabilities. 95 // Returns the Codec ID for the vendor-specific A2DP codec. 96 uint16_t A2DP_VendorCodecGetCodecId(const uint8_t* p_codec_info); 97 98 // Checks whether the A2DP vendor-specific data packets should contain RTP 99 // header. |content_protection_enabled| is true if Content Protection is 100 // enabled. |p_codec_info| contains information about the codec capabilities. 101 // Returns true if the A2DP vendor-specific data packets should contain RTP 102 // header, otherwise false. 103 bool A2DP_VendorUsesRtpHeader(bool content_protection_enabled, 104 const uint8_t* p_codec_info); 105 106 // Gets the A2DP vendor-specific codec name for a given |p_codec_info|. 107 const char* A2DP_VendorCodecName(const uint8_t* p_codec_info); 108 109 // Checks whether two A2DP vendor-specific codecs |p_codec_info_a| and 110 // |p_codec_info_b| have the same type. 111 // Returns true if the two codecs have the same type, otherwise false. 112 // If the codec type is not recognized, the return value is false. 113 bool A2DP_VendorCodecTypeEquals(const uint8_t* p_codec_info_a, 114 const uint8_t* p_codec_info_b); 115 116 // Checks whether two A2DP vendor-specific codecs |p_codec_info_a| and 117 // |p_codec_info_b| are exactly the same. 118 // Returns true if the two codecs are exactly the same, otherwise false. 119 // If the codec type is not recognized, the return value is false. 120 bool A2DP_VendorCodecEquals(const uint8_t* p_codec_info_a, 121 const uint8_t* p_codec_info_b); 122 123 // Gets the track sample rate value for the A2DP vendor-specific codec. 124 // |p_codec_info| is a pointer to the vendor-specific codec_info to decode. 125 // Returns the track sample rate on success, or -1 if |p_codec_info| 126 // contains invalid codec information. 127 int A2DP_VendorGetTrackSampleRate(const uint8_t* p_codec_info); 128 129 // Gets the bits per audio sample for the A2DP vendor-specific codec. 130 // |p_codec_info| is a pointer to the vendor-specific codec_info to decode. 131 // Returns the bits per audio sample on success, or -1 if |p_codec_info| 132 // contains invalid codec information. 133 int A2DP_VendorGetTrackBitsPerSample(const uint8_t* p_codec_info); 134 135 // Gets the channel count for the A2DP vendor-specific codec. 136 // |p_codec_info| is a pointer to the vendor-specific codec_info to decode. 137 // Returns the channel count on success, or -1 if |p_codec_info| 138 // contains invalid codec information. 139 int A2DP_VendorGetTrackChannelCount(const uint8_t* p_codec_info); 140 141 // Gets the channel type for the A2DP vendor-specific Sink codec: 142 // 1 for mono, or 3 for dual/stereo/joint. 143 // |p_codec_info| is a pointer to the vendor-specific codec_info to decode. 144 // Returns the channel type on success, or -1 if |p_codec_info| 145 // contains invalid codec information. 146 int A2DP_VendorGetSinkTrackChannelType(const uint8_t* p_codec_info); 147 148 // Computes the number of frames to process in a time window for the A2DP 149 // vendor-specific Sink codec. |time_interval_ms| is the time interval 150 // (in milliseconds). 151 // |p_codec_info| is a pointer to the codec_info to decode. 152 // Returns the number of frames to process on success, or -1 if |p_codec_info| 153 // contains invalid codec information. 154 int A2DP_VendorGetSinkFramesCountToProcess(uint64_t time_interval_ms, 155 const uint8_t* p_codec_info); 156 157 // Gets the A2DP codec-specific audio data timestamp from an audio packet. 158 // |p_codec_info| contains the codec information. 159 // |p_data| contains the audio data. 160 // The timestamp is stored in |p_timestamp|. 161 // Returns true on success, otherwise false. 162 bool A2DP_VendorGetPacketTimestamp(const uint8_t* p_codec_info, 163 const uint8_t* p_data, 164 uint32_t* p_timestamp); 165 166 // Builds A2DP vendor-specific codec header for audio data. 167 // |p_codec_info| contains the codec information. 168 // |p_buf| contains the audio data. 169 // |frames_per_packet| is the number of frames in this packet. 170 // Returns true on success, otherwise false. 171 bool A2DP_VendorBuildCodecHeader(const uint8_t* p_codec_info, BT_HDR* p_buf, 172 uint16_t frames_per_packet); 173 174 // Gets the A2DP vendor encoder interface that can be used to encode and 175 // prepare A2DP packets for transmission - see |tA2DP_ENCODER_INTERFACE|. 176 // |p_codec_info| contains the codec information. 177 // Returns the A2DP vendor encoder interface if the |p_codec_info| is valid and 178 // supported, otherwise NULL. 179 const tA2DP_ENCODER_INTERFACE* A2DP_VendorGetEncoderInterface( 180 const uint8_t* p_codec_info); 181 182 // Adjusts the A2DP vendor-specific codec, based on local support and Bluetooth 183 // specification. 184 // |p_codec_info| contains the codec information to adjust. 185 // Returns true if |p_codec_info| is valid and supported, otherwise false. 186 bool A2DP_VendorAdjustCodec(uint8_t* p_codec_info); 187 188 // Gets the A2DP vendor Source codec index for a given |p_codec_info|. 189 // Returns the corresponding |btav_a2dp_codec_index_t| on success, 190 // otherwise |BTAV_A2DP_CODEC_INDEX_MAX|. 191 btav_a2dp_codec_index_t A2DP_VendorSourceCodecIndex( 192 const uint8_t* p_codec_info); 193 194 // Gets the A2DP vendor codec name for a given |codec_index|. 195 const char* A2DP_VendorCodecIndexStr(btav_a2dp_codec_index_t codec_index); 196 197 // Initializes A2DP vendor codec-specific information into |tAVDT_CFG| 198 // configuration entry pointed by |p_cfg|. The selected codec is defined by 199 // |codec_index|. 200 // Returns true on success, otherwise false. 201 bool A2DP_VendorInitCodecConfig(btav_a2dp_codec_index_t codec_index, 202 tAVDT_CFG* p_cfg); 203 204 #endif // A2DP_VENDOR_H 205