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 // 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 // Gets the Vendor ID for the vendor-specific A2DP codec. 80 // |p_codec_info| contains information about the codec capabilities. 81 // Returns the Vendor ID for the vendor-specific A2DP codec. 82 uint32_t A2DP_VendorCodecGetVendorId(const uint8_t* p_codec_info); 83 84 // Gets the Codec ID for the vendor-specific A2DP codec. 85 // |p_codec_info| contains information about the codec capabilities. 86 // Returns the Codec ID for the vendor-specific A2DP codec. 87 uint16_t A2DP_VendorCodecGetCodecId(const uint8_t* p_codec_info); 88 89 // Checks whether the A2DP vendor-specific data packets should contain RTP 90 // header. |content_protection_enabled| is true if Content Protection is 91 // enabled. |p_codec_info| contains information about the codec capabilities. 92 // Returns true if the A2DP vendor-specific data packets should contain RTP 93 // header, otherwise false. 94 bool A2DP_VendorUsesRtpHeader(bool content_protection_enabled, 95 const uint8_t* p_codec_info); 96 97 // Gets the A2DP vendor-specific codec name for a given |p_codec_info|. 98 const char* A2DP_VendorCodecName(const uint8_t* p_codec_info); 99 100 // Checks whether two A2DP vendor-specific codecs |p_codec_info_a| and 101 // |p_codec_info_b| have the same type. 102 // Returns true if the two codecs have the same type, otherwise false. 103 // If the codec type is not recognized, the return value is false. 104 bool A2DP_VendorCodecTypeEquals(const uint8_t* p_codec_info_a, 105 const uint8_t* p_codec_info_b); 106 107 // Checks whether two A2DP vendor-specific codecs |p_codec_info_a| and 108 // |p_codec_info_b| are exactly the same. 109 // Returns true if the two codecs are exactly the same, otherwise false. 110 // If the codec type is not recognized, the return value is false. 111 bool A2DP_VendorCodecEquals(const uint8_t* p_codec_info_a, 112 const uint8_t* p_codec_info_b); 113 114 // Gets the track sample rate value for the A2DP vendor-specific codec. 115 // |p_codec_info| is a pointer to the vendor-specific codec_info to decode. 116 // Returns the track sample rate on success, or -1 if |p_codec_info| 117 // contains invalid codec information. 118 int A2DP_VendorGetTrackSampleRate(const uint8_t* p_codec_info); 119 120 // Gets the track bits per sample value for the A2DP vendor-specific codec. 121 // |p_codec_info| is a pointer to the vendor-specific codec_info to decode. 122 // Returns the track sample rate on success, or -1 if |p_codec_info| 123 // contains invalid codec information. 124 int A2DP_VendorGetTrackBitsPerSample(const uint8_t* p_codec_info); 125 126 // Gets the channel count for the A2DP vendor-specific codec. 127 // |p_codec_info| is a pointer to the vendor-specific codec_info to decode. 128 // Returns the channel count on success, or -1 if |p_codec_info| 129 // contains invalid codec information. 130 int A2DP_VendorGetTrackChannelCount(const uint8_t* p_codec_info); 131 132 // Gets the bitrate for the A2DP vendor-specific codec. 133 // |p_codec_info| is a pointer to the vendor-specific codec_info to decode. 134 // Returns the channel count on success, or -1 if |p_codec_info| 135 // contains invalid codec information. 136 int A2DP_VendorGetBitRate(const uint8_t* p_codec_info); 137 138 // Gets the channel type for the A2DP vendor-specific Sink codec: 139 // 1 for mono, or 3 for dual/stereo/joint. 140 // |p_codec_info| is a pointer to the vendor-specific codec_info to decode. 141 // Returns the channel type on success, or -1 if |p_codec_info| 142 // contains invalid codec information. 143 int A2DP_VendorGetSinkTrackChannelType(const uint8_t* p_codec_info); 144 145 // Gets the A2DP codec-specific audio data timestamp from an audio packet. 146 // |p_codec_info| contains the codec information. 147 // |p_data| contains the audio data. 148 // The timestamp is stored in |p_timestamp|. 149 // Returns true on success, otherwise false. 150 bool A2DP_VendorGetPacketTimestamp(const uint8_t* p_codec_info, 151 const uint8_t* p_data, 152 uint32_t* p_timestamp); 153 154 // Builds A2DP vendor-specific codec header for audio data. 155 // |p_codec_info| contains the codec information. 156 // |p_buf| contains the audio data. 157 // |frames_per_packet| is the number of frames in this packet. 158 // Returns true on success, otherwise false. 159 bool A2DP_VendorBuildCodecHeader(const uint8_t* p_codec_info, BT_HDR* p_buf, 160 uint16_t frames_per_packet); 161 162 // Gets the A2DP vendor encoder interface that can be used to encode and 163 // prepare A2DP packets for transmission - see |tA2DP_ENCODER_INTERFACE|. 164 // |p_codec_info| contains the codec information. 165 // Returns the A2DP vendor encoder interface if the |p_codec_info| is valid and 166 // supported, otherwise NULL. 167 const tA2DP_ENCODER_INTERFACE* A2DP_VendorGetEncoderInterface( 168 const uint8_t* p_codec_info); 169 170 // Gets the current A2DP vendor decoder interface that can be used to decode 171 // received A2DP packets - see |tA2DP_DECODER_INTERFACE|. 172 // |p_codec_info| contains the codec information. 173 // Returns the A2DP vendor decoder interface if the |p_codec_info| is valid and 174 // supported, otherwise NULL. 175 const tA2DP_DECODER_INTERFACE* A2DP_VendorGetDecoderInterface( 176 const uint8_t* p_codec_info); 177 178 // Adjusts the A2DP vendor-specific codec, based on local support and Bluetooth 179 // specification. 180 // |p_codec_info| contains the codec information to adjust. 181 // Returns true if |p_codec_info| is valid and supported, otherwise false. 182 bool A2DP_VendorAdjustCodec(uint8_t* p_codec_info); 183 184 // Gets the A2DP vendor Source codec index for a given |p_codec_info|. 185 // Returns the corresponding |btav_a2dp_codec_index_t| on success, 186 // otherwise |BTAV_A2DP_CODEC_INDEX_MAX|. 187 btav_a2dp_codec_index_t A2DP_VendorSourceCodecIndex( 188 const uint8_t* p_codec_info); 189 190 // Gets the A2DP vendor Sink codec index for a given |p_codec_info|. 191 // Returns the corresponding |btav_a2dp_codec_index_t| on success, 192 // otherwise |BTAV_A2DP_CODEC_INDEX_MAX|. 193 btav_a2dp_codec_index_t A2DP_VendorSinkCodecIndex(const uint8_t* p_codec_info); 194 195 // Gets the A2DP vendor codec name for a given |codec_index|. 196 const char* A2DP_VendorCodecIndexStr(btav_a2dp_codec_index_t codec_index); 197 198 // Initializes A2DP vendor codec-specific information into |AvdtpSepConfig| 199 // configuration entry pointed by |p_cfg|. The selected codec is defined by 200 // |codec_index|. 201 // Returns true on success, otherwise false. 202 bool A2DP_VendorInitCodecConfig(btav_a2dp_codec_index_t codec_index, 203 AvdtpSepConfig* p_cfg); 204 205 // Decodes A2DP vendor codec info into a human readable string. 206 // |p_codec_info| is a pointer to the codec_info to decode. 207 // Returns a string describing the codec information. 208 std::string A2DP_VendorCodecInfoString(const uint8_t* p_codec_info); 209 210 #endif // A2DP_VENDOR_H 211