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261 lines
11 KiB
261 lines
11 KiB
/* |
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* Copyright (C) 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 low complexity subband codec (SBC) |
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// |
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#ifndef A2DP_SBC_H |
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#define A2DP_SBC_H |
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#include "a2dp_codec_api.h" |
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#include "a2dp_sbc_constants.h" |
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#include "avdt_api.h" |
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class A2dpCodecConfigSbc : public A2dpCodecConfig { |
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public: |
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A2dpCodecConfigSbc(btav_a2dp_codec_priority_t codec_priority); |
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virtual ~A2dpCodecConfigSbc(); |
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bool init() override; |
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period_ms_t encoderIntervalMs() 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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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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class A2dpCodecConfigSbcSink : public A2dpCodecConfig { |
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public: |
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A2dpCodecConfigSbcSink(btav_a2dp_codec_priority_t codec_priority); |
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virtual ~A2dpCodecConfigSbcSink(); |
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bool init() override; |
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period_ms_t encoderIntervalMs() 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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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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}; |
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// Checks whether the codec capabilities contain a valid A2DP SBC 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 SBC codec, |
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// otherwise false. |
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bool A2DP_IsSourceCodecValidSbc(const uint8_t* p_codec_info); |
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// Checks whether the codec capabilities contain a valid A2DP SBC 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 SBC codec, |
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// otherwise false. |
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bool A2DP_IsSinkCodecValidSbc(const uint8_t* p_codec_info); |
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// Checks whether the codec capabilities contain a valid peer A2DP SBC 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 SBC codec, |
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// otherwise false. |
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bool A2DP_IsPeerSourceCodecValidSbc(const uint8_t* p_codec_info); |
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// Checks whether the codec capabilities contain a valid peer A2DP SBC 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 SBC codec, |
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// otherwise false. |
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bool A2DP_IsPeerSinkCodecValidSbc(const uint8_t* p_codec_info); |
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// Checks whether A2DP SBC 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 A2DP SBC Sink codec is supported, otherwise false. |
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bool A2DP_IsSinkCodecSupportedSbc(const uint8_t* p_codec_info); |
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// Checks whether an A2DP SBC Source codec for a peer Source device is |
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// 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 A2DP SBC Source codec for a peer Source device is |
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// supported, otherwise false. |
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bool A2DP_IsPeerSourceCodecSupportedSbc(const uint8_t* p_codec_info); |
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// Initialize state with the default A2DP SBC codec. |
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// The initialized state with the codec capabilities is stored in |
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// |p_codec_info|. |
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void A2DP_InitDefaultCodecSbc(uint8_t* p_codec_info); |
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// Builds A2DP preferred SBC Sink capability from SBC Source capability. |
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// |p_src_cap| is the Source capability to use. |
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// |p_pref_cfg| is the result Sink capability to store. |
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// Returns |A2DP_SUCCESS| on success, otherwise the corresponding A2DP error |
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// status code. |
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tA2DP_STATUS A2DP_BuildSrc2SinkConfigSbc(const uint8_t* p_src_cap, |
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uint8_t* p_pref_cfg); |
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// Gets the A2DP SBC codec name for a given |p_codec_info|. |
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const char* A2DP_CodecNameSbc(const uint8_t* p_codec_info); |
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// Checks whether two A2DP SBC 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_CodecTypeEqualsSbc(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 SBC 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 SBC, the return value is false. |
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bool A2DP_CodecEqualsSbc(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 SBC codec. |
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// |p_codec_info| is a pointer to the SBC 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_GetTrackSampleRateSbc(const uint8_t* p_codec_info); |
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// Gets the channel count for the A2DP SBC codec. |
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// |p_codec_info| is a pointer to the SBC 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_GetTrackChannelCountSbc(const uint8_t* p_codec_info); |
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// Gets the number of subbands for the A2DP SBC codec. |
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// |p_codec_info| is a pointer to the SBC codec_info to decode. |
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// Returns the number of subbands on success, or -1 if |p_codec_info| |
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// contains invalid codec information. |
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int A2DP_GetNumberOfSubbandsSbc(const uint8_t* p_codec_info); |
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// Gets the number of blocks for the A2DP SBC codec. |
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// |p_codec_info| is a pointer to the SBC codec_info to decode. |
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// Returns the number of blocks on success, or -1 if |p_codec_info| |
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// contains invalid codec information. |
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int A2DP_GetNumberOfBlocksSbc(const uint8_t* p_codec_info); |
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// Gets the allocation method code for the A2DP SBC codec. |
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// The actual value is codec-specific - see |A2DP_SBC_IE_ALLOC_MD_*|. |
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// |p_codec_info| is a pointer to the SBC codec_info to decode. |
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// Returns the allocation method code on success, or -1 if |p_codec_info| |
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// contains invalid codec information. |
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int A2DP_GetAllocationMethodCodeSbc(const uint8_t* p_codec_info); |
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// Gets the channel mode code for the A2DP SBC codec. |
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// The actual value is codec-specific - see |A2DP_SBC_IE_CH_MD_*|. |
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// |p_codec_info| is a pointer to the SBC codec_info to decode. |
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// Returns the channel mode code on success, or -1 if |p_codec_info| |
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// contains invalid codec information. |
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int A2DP_GetChannelModeCodeSbc(const uint8_t* p_codec_info); |
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// Gets the sampling frequency code for the A2DP SBC codec. |
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// The actual value is codec-specific - see |A2DP_SBC_IE_SAMP_FREQ_*|. |
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// |p_codec_info| is a pointer to the SBC codec_info to decode. |
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// Returns the sampling frequency code on success, or -1 if |p_codec_info| |
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// contains invalid codec information. |
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int A2DP_GetSamplingFrequencyCodeSbc(const uint8_t* p_codec_info); |
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// Gets the minimum bitpool for the A2DP SBC codec. |
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// The actual value is codec-specific - see |A2DP_SBC_IE_MIN_BITPOOL|. |
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// |p_codec_info| is a pointer to the SBC codec_info to decode. |
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// Returns the minimum bitpool on success, or -1 if |p_codec_info| |
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// contains invalid codec information. |
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int A2DP_GetMinBitpoolSbc(const uint8_t* p_codec_info); |
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// Gets the maximum bitpool for the A2DP SBC codec. |
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// The actual value is codec-specific - see |A2DP_SBC_IE_MAX_BITPOOL|. |
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// |p_codec_info| is a pointer to the SBC codec_info to decode. |
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// Returns the maximum bitpool on success, or -1 if |p_codec_info| |
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// contains invalid codec information. |
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int A2DP_GetMaxBitpoolSbc(const uint8_t* p_codec_info); |
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// Gets the channel type for the A2DP SBC 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 SBC 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_GetSinkTrackChannelTypeSbc(const uint8_t* p_codec_info); |
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// Computes the number of frames to process in a time window for the A2DP |
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// SBC sink codec. |time_interval_ms| is the time interval (in milliseconds). |
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// |p_codec_info| is a pointer to the codec_info to decode. |
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// Returns the number of frames to process on success, or -1 if |p_codec_info| |
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// contains invalid codec information. |
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int A2DP_GetSinkFramesCountToProcessSbc(uint64_t time_interval_ms, |
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const uint8_t* p_codec_info); |
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// Gets the A2DP SBC 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_GetPacketTimestampSbc(const uint8_t* p_codec_info, |
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const uint8_t* p_data, uint32_t* p_timestamp); |
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// Builds A2DP SBC 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_BuildCodecHeaderSbc(const uint8_t* p_codec_info, BT_HDR* p_buf, |
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uint16_t frames_per_packet); |
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// Decodes and displays A2DP SBC codec info when using |LOG_DEBUG|. |
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// |p_codec_info| is a pointer to the SBC codec_info to decode and display. |
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// Returns true if the codec information is valid, otherwise false. |
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bool A2DP_DumpCodecInfoSbc(const uint8_t* p_codec_info); |
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// Gets the A2DP SBC 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 SBC 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_GetEncoderInterfaceSbc( |
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const uint8_t* p_codec_info); |
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// Adjusts the A2DP SBC 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_AdjustCodecSbc(uint8_t* p_codec_info); |
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// Gets the A2DP SBC 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_SourceCodecIndexSbc(const uint8_t* p_codec_info); |
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// Gets the A2DP SBC Source codec name. |
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const char* A2DP_CodecIndexStrSbc(void); |
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// Gets the A2DP SBC Sink codec name. |
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const char* A2DP_CodecIndexStrSbcSink(void); |
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// Initializes A2DP SBC Source codec information into |tAVDT_CFG| configuration |
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// entry pointed by |p_cfg|. |
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bool A2DP_InitCodecConfigSbc(tAVDT_CFG* p_cfg); |
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// Initializes A2DP SBC Sink codec information into |tAVDT_CFG| configuration |
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// entry pointed by |p_cfg|. |
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bool A2DP_InitCodecConfigSbcSink(tAVDT_CFG* p_cfg); |
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#endif // A2DP_SBC_H
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