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211 lines
9.6 KiB
211 lines
9.6 KiB
/*
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* Copyright 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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//
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// Vendor Specific A2DP Codecs Support
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//
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#ifndef A2DP_VENDOR_H
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#define A2DP_VENDOR_H
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#include <stdbool.h>
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#include "a2dp_codec_api.h"
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/* Offset for A2DP vendor codec */
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#define A2DP_VENDOR_CODEC_START_IDX 3
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/* Offset for Vendor ID for A2DP vendor codec */
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#define A2DP_VENDOR_CODEC_VENDOR_ID_START_IDX A2DP_VENDOR_CODEC_START_IDX
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/* Offset for Codec ID for A2DP vendor codec */
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#define A2DP_VENDOR_CODEC_CODEC_ID_START_IDX \
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(A2DP_VENDOR_CODEC_VENDOR_ID_START_IDX + sizeof(uint32_t))
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// Checks whether the codec capabilities contain a valid A2DP vendor-specific
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// Source codec.
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// NOTE: only codecs that are implemented are considered valid.
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// Returns true if |p_codec_info| contains information about a valid
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// vendor-specific codec, otherwise false.
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bool A2DP_IsVendorSourceCodecValid(const uint8_t* p_codec_info);
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// Checks whether the codec capabilities contain a valid A2DP vendor-specific
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// Sink codec.
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// NOTE: only codecs that are implemented are considered valid.
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// Returns true if |p_codec_info| contains information about a valid
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// vendor-specific codec, otherwise false.
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bool A2DP_IsVendorSinkCodecValid(const uint8_t* p_codec_info);
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// Checks whether the codec capabilities contain a valid peer A2DP
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// vendor-specific Source codec.
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// NOTE: only codecs that are implemented are considered valid.
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// Returns true if |p_codec_info| contains information about a valid
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// vendor-specific codec, otherwise false.
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bool A2DP_IsVendorPeerSourceCodecValid(const uint8_t* p_codec_info);
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// Checks whether the codec capabilities contain a valid peer A2DP
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// vendor-specific Sink codec.
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// NOTE: only codecs that are implemented are considered valid.
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// Returns true if |p_codec_info| contains information about a valid
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// vendor-specific codec, otherwise false.
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bool A2DP_IsVendorPeerSinkCodecValid(const uint8_t* p_codec_info);
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// Checks whether a vendor-specific A2DP Sink codec is supported.
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// |p_codec_info| contains information about the codec capabilities.
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// Returns true if the vendor-specific A2DP Sink codec is supported,
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// otherwise false.
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bool A2DP_IsVendorSinkCodecSupported(const uint8_t* p_codec_info);
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// Checks whether a vendor-specific A2DP Source codec for a peer Source device
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// is supported.
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// |p_codec_info| contains information about the codec capabilities of the
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// peer device.
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// Returns true if the vendor-specific A2DP Source codec for a peer Source
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// device is supported, otherwise false.
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bool A2DP_IsVendorPeerSourceCodecSupported(const uint8_t* p_codec_info);
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// Gets the Vendor ID for the vendor-specific A2DP codec.
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// |p_codec_info| contains information about the codec capabilities.
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// Returns the Vendor ID for the vendor-specific A2DP codec.
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uint32_t A2DP_VendorCodecGetVendorId(const uint8_t* p_codec_info);
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// Gets the Codec ID for the vendor-specific A2DP codec.
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// |p_codec_info| contains information about the codec capabilities.
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// Returns the Codec ID for the vendor-specific A2DP codec.
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uint16_t A2DP_VendorCodecGetCodecId(const uint8_t* p_codec_info);
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// Checks whether the A2DP vendor-specific data packets should contain RTP
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// header. |content_protection_enabled| is true if Content Protection is
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// enabled. |p_codec_info| contains information about the codec capabilities.
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// Returns true if the A2DP vendor-specific data packets should contain RTP
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// header, otherwise false.
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bool A2DP_VendorUsesRtpHeader(bool content_protection_enabled,
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const uint8_t* p_codec_info);
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// Gets the A2DP vendor-specific codec name for a given |p_codec_info|.
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const char* A2DP_VendorCodecName(const uint8_t* p_codec_info);
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// Checks whether two A2DP vendor-specific codecs |p_codec_info_a| and
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// |p_codec_info_b| have the same type.
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// Returns true if the two codecs have the same type, otherwise false.
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// If the codec type is not recognized, the return value is false.
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bool A2DP_VendorCodecTypeEquals(const uint8_t* p_codec_info_a,
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const uint8_t* p_codec_info_b);
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// Checks whether two A2DP vendor-specific codecs |p_codec_info_a| and
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// |p_codec_info_b| are exactly the same.
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// Returns true if the two codecs are exactly the same, otherwise false.
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// If the codec type is not recognized, the return value is false.
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bool A2DP_VendorCodecEquals(const uint8_t* p_codec_info_a,
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const uint8_t* p_codec_info_b);
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// Gets the track sample rate value for the A2DP vendor-specific codec.
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// |p_codec_info| is a pointer to the vendor-specific codec_info to decode.
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// Returns the track sample rate on success, or -1 if |p_codec_info|
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// contains invalid codec information.
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int A2DP_VendorGetTrackSampleRate(const uint8_t* p_codec_info);
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// Gets the track bits per sample value for the A2DP vendor-specific codec.
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// |p_codec_info| is a pointer to the vendor-specific codec_info to decode.
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// Returns the track sample rate on success, or -1 if |p_codec_info|
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// contains invalid codec information.
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int A2DP_VendorGetTrackBitsPerSample(const uint8_t* p_codec_info);
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// Gets the channel count for the A2DP vendor-specific codec.
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// |p_codec_info| is a pointer to the vendor-specific codec_info to decode.
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// Returns the channel count on success, or -1 if |p_codec_info|
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// contains invalid codec information.
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int A2DP_VendorGetTrackChannelCount(const uint8_t* p_codec_info);
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// Gets the bitrate for the A2DP vendor-specific codec.
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// |p_codec_info| is a pointer to the vendor-specific codec_info to decode.
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// Returns the channel count on success, or -1 if |p_codec_info|
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// contains invalid codec information.
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int A2DP_VendorGetBitRate(const uint8_t* p_codec_info);
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// Gets the channel type for the A2DP vendor-specific Sink codec:
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// 1 for mono, or 3 for dual/stereo/joint.
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// |p_codec_info| is a pointer to the vendor-specific codec_info to decode.
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// Returns the channel type on success, or -1 if |p_codec_info|
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// contains invalid codec information.
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int A2DP_VendorGetSinkTrackChannelType(const uint8_t* p_codec_info);
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// Gets the A2DP codec-specific audio data timestamp from an audio packet.
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// |p_codec_info| contains the codec information.
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// |p_data| contains the audio data.
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// The timestamp is stored in |p_timestamp|.
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// Returns true on success, otherwise false.
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bool A2DP_VendorGetPacketTimestamp(const uint8_t* p_codec_info,
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const uint8_t* p_data,
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uint32_t* p_timestamp);
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// Builds A2DP vendor-specific codec header for audio data.
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// |p_codec_info| contains the codec information.
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// |p_buf| contains the audio data.
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// |frames_per_packet| is the number of frames in this packet.
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// Returns true on success, otherwise false.
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bool A2DP_VendorBuildCodecHeader(const uint8_t* p_codec_info, BT_HDR* p_buf,
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uint16_t frames_per_packet);
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// Gets the A2DP vendor encoder interface that can be used to encode and
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// prepare A2DP packets for transmission - see |tA2DP_ENCODER_INTERFACE|.
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// |p_codec_info| contains the codec information.
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// Returns the A2DP vendor encoder interface if the |p_codec_info| is valid and
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// supported, otherwise NULL.
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const tA2DP_ENCODER_INTERFACE* A2DP_VendorGetEncoderInterface(
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const uint8_t* p_codec_info);
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// Gets the current A2DP vendor decoder interface that can be used to decode
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// received A2DP packets - see |tA2DP_DECODER_INTERFACE|.
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// |p_codec_info| contains the codec information.
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// Returns the A2DP vendor decoder interface if the |p_codec_info| is valid and
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// supported, otherwise NULL.
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const tA2DP_DECODER_INTERFACE* A2DP_VendorGetDecoderInterface(
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const uint8_t* p_codec_info);
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// Adjusts the A2DP vendor-specific codec, based on local support and Bluetooth
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// specification.
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// |p_codec_info| contains the codec information to adjust.
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// Returns true if |p_codec_info| is valid and supported, otherwise false.
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bool A2DP_VendorAdjustCodec(uint8_t* p_codec_info);
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// Gets the A2DP vendor Source codec index for a given |p_codec_info|.
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// Returns the corresponding |btav_a2dp_codec_index_t| on success,
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// otherwise |BTAV_A2DP_CODEC_INDEX_MAX|.
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btav_a2dp_codec_index_t A2DP_VendorSourceCodecIndex(
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const uint8_t* p_codec_info);
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// Gets the A2DP vendor Sink codec index for a given |p_codec_info|.
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// Returns the corresponding |btav_a2dp_codec_index_t| on success,
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// otherwise |BTAV_A2DP_CODEC_INDEX_MAX|.
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btav_a2dp_codec_index_t A2DP_VendorSinkCodecIndex(const uint8_t* p_codec_info);
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// Gets the A2DP vendor codec name for a given |codec_index|.
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const char* A2DP_VendorCodecIndexStr(btav_a2dp_codec_index_t codec_index);
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// Initializes A2DP vendor codec-specific information into |AvdtpSepConfig|
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// configuration entry pointed by |p_cfg|. The selected codec is defined by
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// |codec_index|.
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// Returns true on success, otherwise false.
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bool A2DP_VendorInitCodecConfig(btav_a2dp_codec_index_t codec_index,
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AvdtpSepConfig* p_cfg);
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// Decodes A2DP vendor codec info into a human readable string.
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// |p_codec_info| is a pointer to the codec_info to decode.
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// Returns a string describing the codec information.
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std::string A2DP_VendorCodecInfoString(const uint8_t* p_codec_info);
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#endif // A2DP_VENDOR_H
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