/*
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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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// A2DP Codec API for aptX
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//
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#ifndef A2DP_VENDOR_APTX_H
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#define A2DP_VENDOR_APTX_H
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#include "a2dp_codec_api.h"
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#include "a2dp_vendor_aptx_constants.h"
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#include "avdt_api.h"
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class A2dpCodecConfigAptx : public A2dpCodecConfig {
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public:
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A2dpCodecConfigAptx(btav_a2dp_codec_priority_t codec_priority);
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virtual ~A2dpCodecConfigAptx();
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bool init() override;
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uint64_t encoderIntervalMs() const override;
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int getEffectiveMtu() const override;
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bool setCodecConfig(const uint8_t* p_peer_codec_info, bool is_capability,
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uint8_t* p_result_codec_config) override;
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bool setPeerCodecCapabilities(
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const uint8_t* p_peer_codec_capabilities) override;
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private:
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bool useRtpHeaderMarkerBit() const override;
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bool updateEncoderUserConfig(
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const tA2DP_ENCODER_INIT_PEER_PARAMS* p_peer_params,
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bool* p_restart_input, bool* p_restart_output,
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bool* p_config_updated) override;
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void debug_codec_dump(int fd) override;
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};
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// Checks whether the codec capabilities contain a valid A2DP aptX Source
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// 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 aptX
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// codec, otherwise false.
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bool A2DP_IsVendorSourceCodecValidAptx(const uint8_t* p_codec_info);
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// Checks whether the codec capabilities contain a valid peer A2DP aptX Sink
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// 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 aptX
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// codec, otherwise false.
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bool A2DP_IsVendorPeerSinkCodecValidAptx(const uint8_t* p_codec_info);
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// Checks whether the A2DP data packets should contain RTP header.
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// |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 data packets should contain RTP header, otherwise
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// false.
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bool A2DP_VendorUsesRtpHeaderAptx(bool content_protection_enabled,
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const uint8_t* p_codec_info);
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// Gets the A2DP aptX codec name for a given |p_codec_info|.
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const char* A2DP_VendorCodecNameAptx(const uint8_t* p_codec_info);
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// Checks whether two A2DP aptX codecs |p_codec_info_a| and |p_codec_info_b|
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// have the same type.
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// Returns true if the two codecs have the same type, otherwise false.
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bool A2DP_VendorCodecTypeEqualsAptx(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 aptX codecs |p_codec_info_a| and |p_codec_info_b|
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// 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 aptX, the return value is false.
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bool A2DP_VendorCodecEqualsAptx(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 aptX codec.
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// |p_codec_info| is a pointer to the aptX 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_VendorGetTrackSampleRateAptx(const uint8_t* p_codec_info);
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// Gets the track bits per sample value for the A2DP aptX codec.
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// |p_codec_info| is a pointer to the aptX codec_info to decode.
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// Returns the track bits per sample on success, or -1 if |p_codec_info|
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// contains invalid codec information.
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int A2DP_VendorGetTrackBitsPerSampleAptx(const uint8_t* p_codec_info);
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// Gets the track bitrate value for the A2DP aptX codec.
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// |p_codec_info| is a pointer to the aptX 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_VendorGetBitRateAptx(const uint8_t* p_codec_info);
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// Gets the channel count for the A2DP aptX codec.
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// |p_codec_info| is a pointer to the aptX 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_VendorGetTrackChannelCountAptx(const uint8_t* p_codec_info);
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// Gets the A2DP aptX 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_VendorGetPacketTimestampAptx(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 aptX 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_VendorBuildCodecHeaderAptx(const uint8_t* p_codec_info, BT_HDR* p_buf,
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uint16_t frames_per_packet);
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// Decodes A2DP aptX codec info into a human readable string.
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// |p_codec_info| is a pointer to the aptX codec_info to decode.
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// Returns a string describing the codec information.
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std::string A2DP_VendorCodecInfoStringAptx(const uint8_t* p_codec_info);
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// Gets the A2DP aptX encoder interface that can be used to encode and prepare
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// 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 aptX 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_VendorGetEncoderInterfaceAptx(
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const uint8_t* p_codec_info);
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// Adjusts the A2DP aptX 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_VendorAdjustCodecAptx(uint8_t* p_codec_info);
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// Gets the A2DP aptX 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_VendorSourceCodecIndexAptx(
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const uint8_t* p_codec_info);
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// Gets the A2DP aptX Source codec name.
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const char* A2DP_VendorCodecIndexStrAptx(void);
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// Initializes A2DP aptX Source codec information into |AvdtpSepConfig|
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// configuration entry pointed by |p_cfg|.
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bool A2DP_VendorInitCodecConfigAptx(AvdtpSepConfig* p_cfg);
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#endif // A2DP_VENDOR_APTX_H
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