/*
|
* Copyright 2016 The Android Open Source Project
|
*
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
* you may not use this file except in compliance with the License.
|
* You may obtain a copy of the License at
|
*
|
* http://www.apache.org/licenses/LICENSE-2.0
|
*
|
* Unless required by applicable law or agreed to in writing, software
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
* See the License for the specific language governing permissions and
|
* limitations under the License.
|
*/
|
|
//
|
// A2DP Codec API for low complexity subband codec (SBC)
|
//
|
|
#ifndef A2DP_SBC_H
|
#define A2DP_SBC_H
|
|
#include "a2dp_codec_api.h"
|
#include "a2dp_sbc_constants.h"
|
#include "avdt_api.h"
|
|
class A2dpCodecConfigSbcBase : public A2dpCodecConfig {
|
protected:
|
A2dpCodecConfigSbcBase(btav_a2dp_codec_index_t codec_index,
|
const std::string& name,
|
btav_a2dp_codec_priority_t codec_priority,
|
bool is_source)
|
: A2dpCodecConfig(codec_index, name, codec_priority),
|
is_source_(is_source) {}
|
bool setCodecConfig(const uint8_t* p_peer_codec_info, bool is_capability,
|
uint8_t* p_result_codec_config) override;
|
bool setPeerCodecCapabilities(
|
const uint8_t* p_peer_codec_capabilities) override;
|
|
private:
|
bool is_source_; // True if local is Source
|
};
|
|
class A2dpCodecConfigSbcSource : public A2dpCodecConfigSbcBase {
|
public:
|
A2dpCodecConfigSbcSource(btav_a2dp_codec_priority_t codec_priority);
|
virtual ~A2dpCodecConfigSbcSource();
|
|
bool init() override;
|
uint64_t encoderIntervalMs() const override;
|
int getEffectiveMtu() const override;
|
|
private:
|
bool useRtpHeaderMarkerBit() const override;
|
bool updateEncoderUserConfig(
|
const tA2DP_ENCODER_INIT_PEER_PARAMS* p_peer_params,
|
bool* p_restart_input, bool* p_restart_output,
|
bool* p_config_updated) override;
|
void debug_codec_dump(int fd) override;
|
};
|
|
class A2dpCodecConfigSbcSink : public A2dpCodecConfigSbcBase {
|
public:
|
A2dpCodecConfigSbcSink(btav_a2dp_codec_priority_t codec_priority);
|
virtual ~A2dpCodecConfigSbcSink();
|
|
bool init() override;
|
uint64_t encoderIntervalMs() const override;
|
int getEffectiveMtu() const override;
|
|
private:
|
bool useRtpHeaderMarkerBit() const override;
|
bool updateEncoderUserConfig(
|
const tA2DP_ENCODER_INIT_PEER_PARAMS* p_peer_params,
|
bool* p_restart_input, bool* p_restart_output,
|
bool* p_config_updated) override;
|
};
|
|
// Checks whether the codec capabilities contain a valid A2DP SBC Source codec.
|
// NOTE: only codecs that are implemented are considered valid.
|
// Returns true if |p_codec_info| contains information about a valid SBC codec,
|
// otherwise false.
|
bool A2DP_IsSourceCodecValidSbc(const uint8_t* p_codec_info);
|
|
// Checks whether the codec capabilities contain a valid A2DP SBC Sink codec.
|
// NOTE: only codecs that are implemented are considered valid.
|
// Returns true if |p_codec_info| contains information about a valid SBC codec,
|
// otherwise false.
|
bool A2DP_IsSinkCodecValidSbc(const uint8_t* p_codec_info);
|
|
// Checks whether the codec capabilities contain a valid peer A2DP SBC Source
|
// codec.
|
// NOTE: only codecs that are implemented are considered valid.
|
// Returns true if |p_codec_info| contains information about a valid SBC codec,
|
// otherwise false.
|
bool A2DP_IsPeerSourceCodecValidSbc(const uint8_t* p_codec_info);
|
|
// Checks whether the codec capabilities contain a valid peer A2DP SBC Sink
|
// codec.
|
// NOTE: only codecs that are implemented are considered valid.
|
// Returns true if |p_codec_info| contains information about a valid SBC codec,
|
// otherwise false.
|
bool A2DP_IsPeerSinkCodecValidSbc(const uint8_t* p_codec_info);
|
|
// Checks whether A2DP SBC Sink codec is supported.
|
// |p_codec_info| contains information about the codec capabilities.
|
// Returns true if the A2DP SBC Sink codec is supported, otherwise false.
|
bool A2DP_IsSinkCodecSupportedSbc(const uint8_t* p_codec_info);
|
|
// Checks whether an A2DP SBC Source codec for a peer Source device is
|
// supported.
|
// |p_codec_info| contains information about the codec capabilities of the
|
// peer device.
|
// Returns true if the A2DP SBC Source codec for a peer Source device is
|
// supported, otherwise false.
|
bool A2DP_IsPeerSourceCodecSupportedSbc(const uint8_t* p_codec_info);
|
|
// Initialize state with the default A2DP SBC codec.
|
// The initialized state with the codec capabilities is stored in
|
// |p_codec_info|.
|
void A2DP_InitDefaultCodecSbc(uint8_t* p_codec_info);
|
|
// Gets the A2DP SBC codec name for a given |p_codec_info|.
|
const char* A2DP_CodecNameSbc(const uint8_t* p_codec_info);
|
|
// Checks whether two A2DP SBC codecs |p_codec_info_a| and |p_codec_info_b|
|
// have the same type.
|
// Returns true if the two codecs have the same type, otherwise false.
|
bool A2DP_CodecTypeEqualsSbc(const uint8_t* p_codec_info_a,
|
const uint8_t* p_codec_info_b);
|
|
// Checks whether two A2DP SBC codecs |p_codec_info_a| and |p_codec_info_b|
|
// are exactly the same.
|
// Returns true if the two codecs are exactly the same, otherwise false.
|
// If the codec type is not SBC, the return value is false.
|
bool A2DP_CodecEqualsSbc(const uint8_t* p_codec_info_a,
|
const uint8_t* p_codec_info_b);
|
|
// Gets the track sample rate value for the A2DP SBC codec.
|
// |p_codec_info| is a pointer to the SBC codec_info to decode.
|
// Returns the track sample rate on success, or -1 if |p_codec_info|
|
// contains invalid codec information.
|
int A2DP_GetTrackSampleRateSbc(const uint8_t* p_codec_info);
|
|
// Gets the track bits per sample value for the A2DP SBC codec.
|
// |p_codec_info| is a pointer to the SBC codec_info to decode.
|
// Returns the track bits per sample on success, or -1 if |p_codec_info|
|
// contains invalid codec information.
|
int A2DP_GetTrackBitsPerSampleSbc(const uint8_t* p_codec_info);
|
|
// Gets the channel count for the A2DP SBC codec.
|
// |p_codec_info| is a pointer to the SBC codec_info to decode.
|
// Returns the channel count on success, or -1 if |p_codec_info|
|
// contains invalid codec information.
|
int A2DP_GetTrackChannelCountSbc(const uint8_t* p_codec_info);
|
|
// Gets the number of subbands for the A2DP SBC codec.
|
// |p_codec_info| is a pointer to the SBC codec_info to decode.
|
// Returns the number of subbands on success, or -1 if |p_codec_info|
|
// contains invalid codec information.
|
int A2DP_GetNumberOfSubbandsSbc(const uint8_t* p_codec_info);
|
|
// Gets the number of blocks for the A2DP SBC codec.
|
// |p_codec_info| is a pointer to the SBC codec_info to decode.
|
// Returns the number of blocks on success, or -1 if |p_codec_info|
|
// contains invalid codec information.
|
int A2DP_GetNumberOfBlocksSbc(const uint8_t* p_codec_info);
|
|
// Gets the allocation method code for the A2DP SBC codec.
|
// The actual value is codec-specific - see |A2DP_SBC_IE_ALLOC_MD_*|.
|
// |p_codec_info| is a pointer to the SBC codec_info to decode.
|
// Returns the allocation method code on success, or -1 if |p_codec_info|
|
// contains invalid codec information.
|
int A2DP_GetAllocationMethodCodeSbc(const uint8_t* p_codec_info);
|
|
// Gets the channel mode code for the A2DP SBC codec.
|
// The actual value is codec-specific - see |A2DP_SBC_IE_CH_MD_*|.
|
// |p_codec_info| is a pointer to the SBC codec_info to decode.
|
// Returns the channel mode code on success, or -1 if |p_codec_info|
|
// contains invalid codec information.
|
int A2DP_GetChannelModeCodeSbc(const uint8_t* p_codec_info);
|
|
// Gets the sampling frequency code for the A2DP SBC codec.
|
// The actual value is codec-specific - see |A2DP_SBC_IE_SAMP_FREQ_*|.
|
// |p_codec_info| is a pointer to the SBC codec_info to decode.
|
// Returns the sampling frequency code on success, or -1 if |p_codec_info|
|
// contains invalid codec information.
|
int A2DP_GetSamplingFrequencyCodeSbc(const uint8_t* p_codec_info);
|
|
// Gets the minimum bitpool for the A2DP SBC codec.
|
// The actual value is codec-specific - see |A2DP_SBC_IE_MIN_BITPOOL|.
|
// |p_codec_info| is a pointer to the SBC codec_info to decode.
|
// Returns the minimum bitpool on success, or -1 if |p_codec_info|
|
// contains invalid codec information.
|
int A2DP_GetMinBitpoolSbc(const uint8_t* p_codec_info);
|
|
// Gets the maximum bitpool for the A2DP SBC codec.
|
// The actual value is codec-specific - see |A2DP_SBC_IE_MAX_BITPOOL|.
|
// |p_codec_info| is a pointer to the SBC codec_info to decode.
|
// Returns the maximum bitpool on success, or -1 if |p_codec_info|
|
// contains invalid codec information.
|
int A2DP_GetMaxBitpoolSbc(const uint8_t* p_codec_info);
|
|
// Gets the channel type for the A2DP SBC Sink codec:
|
// 1 for mono, or 3 for dual/stereo/joint.
|
// |p_codec_info| is a pointer to the SBC codec_info to decode.
|
// Returns the channel type on success, or -1 if |p_codec_info|
|
// contains invalid codec information.
|
int A2DP_GetSinkTrackChannelTypeSbc(const uint8_t* p_codec_info);
|
|
// Gets the A2DP SBC audio data timestamp from an audio packet.
|
// |p_codec_info| contains the codec information.
|
// |p_data| contains the audio data.
|
// The timestamp is stored in |p_timestamp|.
|
// Returns true on success, otherwise false.
|
bool A2DP_GetPacketTimestampSbc(const uint8_t* p_codec_info,
|
const uint8_t* p_data, uint32_t* p_timestamp);
|
|
// Builds A2DP SBC codec header for audio data.
|
// |p_codec_info| contains the codec information.
|
// |p_buf| contains the audio data.
|
// |frames_per_packet| is the number of frames in this packet.
|
// Returns true on success, otherwise false.
|
bool A2DP_BuildCodecHeaderSbc(const uint8_t* p_codec_info, BT_HDR* p_buf,
|
uint16_t frames_per_packet);
|
|
// Decodes A2DP SBC codec info into a human readable string.
|
// |p_codec_info| is a pointer to the SBC codec_info to decode.
|
// Returns a string describing the codec information.
|
std::string A2DP_CodecInfoStringSbc(const uint8_t* p_codec_info);
|
|
// Gets the A2DP SBC encoder interface that can be used to encode and prepare
|
// A2DP packets for transmission - see |tA2DP_ENCODER_INTERFACE|.
|
// |p_codec_info| contains the codec information.
|
// Returns the A2DP SBC encoder interface if the |p_codec_info| is valid and
|
// supported, otherwise NULL.
|
const tA2DP_ENCODER_INTERFACE* A2DP_GetEncoderInterfaceSbc(
|
const uint8_t* p_codec_info);
|
|
// Gets the A2DP SBC decoder interface that can be used to decode received A2DP
|
// packets - see |tA2DP_DECODER_INTERFACE|.
|
// |p_codec_info| contains the codec information.
|
// Returns the A2DP SBC decoder interface if the |p_codec_info| is valid and
|
// supported, otherwise NULL.
|
const tA2DP_DECODER_INTERFACE* A2DP_GetDecoderInterfaceSbc(
|
const uint8_t* p_codec_info);
|
|
// Adjusts the A2DP SBC codec, based on local support and Bluetooth
|
// specification.
|
// |p_codec_info| contains the codec information to adjust.
|
// Returns true if |p_codec_info| is valid and supported, otherwise false.
|
bool A2DP_AdjustCodecSbc(uint8_t* p_codec_info);
|
|
// Gets the A2DP SBC Source codec index for a given |p_codec_info|.
|
// Returns the corresponding |btav_a2dp_codec_index_t| on success,
|
// otherwise |BTAV_A2DP_CODEC_INDEX_MAX|.
|
btav_a2dp_codec_index_t A2DP_SourceCodecIndexSbc(const uint8_t* p_codec_info);
|
|
// Gets the A2DP SBC Sink codec index for a given |p_codec_info|.
|
// Returns the corresponding |btav_a2dp_codec_index_t| on success,
|
// otherwise |BTAV_A2DP_CODEC_INDEX_MAX|.
|
btav_a2dp_codec_index_t A2DP_SinkCodecIndexSbc(const uint8_t* p_codec_info);
|
|
// Gets the A2DP SBC Source codec name.
|
const char* A2DP_CodecIndexStrSbc(void);
|
|
// Gets the A2DP SBC Sink codec name.
|
const char* A2DP_CodecIndexStrSbcSink(void);
|
|
// Initializes A2DP SBC Source codec information into |AvdtpSepConfig|
|
// configuration entry pointed by |p_cfg|.
|
bool A2DP_InitCodecConfigSbc(AvdtpSepConfig* p_cfg);
|
|
// Initializes A2DP SBC Sink codec information into |AvdtpSepConfig|
|
// configuration entry pointed by |p_cfg|.
|
bool A2DP_InitCodecConfigSbcSink(AvdtpSepConfig* p_cfg);
|
|
// Get SBC bitrate
|
// Returns |uint32_t| bitrate value in bits per second
|
uint32_t A2DP_GetBitrateSbc();
|
|
#endif // A2DP_SBC_H
|
