/*
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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 AAC
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//
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#ifndef A2DP_AAC_H
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#define A2DP_AAC_H
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#include "a2dp_aac_constants.h"
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#include "a2dp_codec_api.h"
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#include "avdt_api.h"
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class A2dpCodecConfigAacBase : public A2dpCodecConfig {
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protected:
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A2dpCodecConfigAacBase(btav_a2dp_codec_index_t codec_index,
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const std::string& name,
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btav_a2dp_codec_priority_t codec_priority,
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bool is_source)
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: A2dpCodecConfig(codec_index, name, codec_priority),
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is_source_(is_source) {}
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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 is_source_; // True if local is Source
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};
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class A2dpCodecConfigAacSource : public A2dpCodecConfigAacBase {
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public:
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A2dpCodecConfigAacSource(btav_a2dp_codec_priority_t codec_priority);
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virtual ~A2dpCodecConfigAacSource();
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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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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 A2dpCodecConfigAacSink : public A2dpCodecConfigAacBase {
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public:
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A2dpCodecConfigAacSink(btav_a2dp_codec_priority_t codec_priority);
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virtual ~A2dpCodecConfigAacSink();
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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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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 AAC 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 AAC
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// codec, otherwise false.
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bool A2DP_IsSourceCodecValidAac(const uint8_t* p_codec_info);
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// Checks whether the codec capabilities contain a valid A2DP AAC 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 AAC codec,
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// otherwise false.
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bool A2DP_IsSinkCodecValidAac(const uint8_t* p_codec_info);
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// Checks whether the codec capabilities contain a valid peer A2DP AAC 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 AAC codec,
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// otherwise false.
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bool A2DP_IsPeerSourceCodecValidAac(const uint8_t* p_codec_info);
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// Checks whether the codec capabilities contain a valid peer A2DP AAC 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 AAC
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// codec, otherwise false.
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bool A2DP_IsPeerSinkCodecValidAac(const uint8_t* p_codec_info);
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// Checks whether A2DP AAC 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 AAC Sink codec is supported, otherwise false.
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bool A2DP_IsSinkCodecSupportedAac(const uint8_t* p_codec_info);
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// Checks whether an A2DP AAC 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 AAC Source codec for a peer Source device is
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// supported, otherwise false.
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bool A2DP_IsPeerSourceCodecSupportedAac(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_UsesRtpHeaderAac(bool content_protection_enabled,
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const uint8_t* p_codec_info);
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// Gets the A2DP AAC codec name for a given |p_codec_info|.
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const char* A2DP_CodecNameAac(const uint8_t* p_codec_info);
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// Checks whether two A2DP AAC 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_CodecTypeEqualsAac(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 AAC 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 AAC, the return value is false.
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bool A2DP_CodecEqualsAac(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 AAC codec.
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// |p_codec_info| is a pointer to the AAC 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_GetTrackSampleRateAac(const uint8_t* p_codec_info);
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// Gets the track bits per sample value for the A2DP AAC codec.
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// |p_codec_info| is a pointer to the AAC 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_GetTrackBitsPerSampleAac(const uint8_t* p_codec_info);
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// Gets the channel count for the A2DP AAC codec.
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// |p_codec_info| is a pointer to the AAC 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_GetTrackChannelCountAac(const uint8_t* p_codec_info);
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// Gets the channel type for the A2DP AAC 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 AAC 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_GetSinkTrackChannelTypeAac(const uint8_t* p_codec_info);
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// Gets the object type code for the A2DP AAC codec.
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// The actual value is codec-specific - see |A2DP_AAC_OBJECT_TYPE_*|.
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// |p_codec_info| is a pointer to the AAC codec_info to decode.
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// Returns the object type code on success, or -1 if |p_codec_info|
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// contains invalid codec information.
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int A2DP_GetObjectTypeCodeAac(const uint8_t* p_codec_info);
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// Gets the channel mode code for the A2DP AAC codec.
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// The actual value is codec-specific - see |A2DP_AAC_CHANNEL_MODE_*|.
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// |p_codec_info| is a pointer to the AAC 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_GetChannelModeCodeAac(const uint8_t* p_codec_info);
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// Gets the variable bit rate support for the A2DP AAC codec.
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// The actual value is codec-specific - see |A2DP_AAC_VARIABLE_BIT_RATE_*|.
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// |p_codec_info| is a pointer to the AAC codec_info to decode.
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// Returns the variable bit rate support on success, or -1 if |p_codec_info|
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// contains invalid codec information.
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int A2DP_GetVariableBitRateSupportAac(const uint8_t* p_codec_info);
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// Gets the bit rate for the A2DP AAC codec.
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// The actual value is codec-specific - for AAC it is in bits per second.
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// |p_codec_info| is a pointer to the AAC codec_info to decode.
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// Returns the bit rate on success, or -1 if |p_codec_info|
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// contains invalid codec information.
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int A2DP_GetBitRateAac(const uint8_t* p_codec_info);
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// Computes the maximum bit rate for the A2DP AAC codec based on the MTU.
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// The actual value is codec-specific - for AAC it is in bits per second.
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// |p_codec_info| is a pointer to the AAC codec_info to decode.
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// |mtu| is the MTU to use for the computation.
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// Returns the maximum bit rate on success, or -1 if |p_codec_info|
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// contains invalid codec information.
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int A2DP_ComputeMaxBitRateAac(const uint8_t* p_codec_info, uint16_t mtu);
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// Gets the A2DP AAC 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_GetPacketTimestampAac(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 AAC 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_BuildCodecHeaderAac(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 AAC codec info into a human readable string.
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// |p_codec_info| is a pointer to the AAC codec_info to decode.
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// Returns a string describing the codec information.
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std::string A2DP_CodecInfoStringAac(const uint8_t* p_codec_info);
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// Gets the A2DP AAC 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 AAC 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_GetEncoderInterfaceAac(
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const uint8_t* p_codec_info);
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// Gets the current A2DP AAC 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 AAC 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_GetDecoderInterfaceAac(
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const uint8_t* p_codec_info);
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// Adjusts the A2DP AAC 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_AdjustCodecAac(uint8_t* p_codec_info);
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// Gets the A2DP AAC 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_SourceCodecIndexAac(const uint8_t* p_codec_info);
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// Gets the A2DP AAC 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_SinkCodecIndexAac(const uint8_t* p_codec_info);
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// Gets the A2DP AAC Source codec name.
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const char* A2DP_CodecIndexStrAac(void);
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// Gets the A2DP AAC Sink codec name.
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const char* A2DP_CodecIndexStrAacSink(void);
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// Initializes A2DP AAC Source codec information into |AvdtpSepConfig|
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// configuration entry pointed by |p_cfg|.
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bool A2DP_InitCodecConfigAac(AvdtpSepConfig* p_cfg);
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// Initializes A2DP AAC Sink codec information into |AvdtpSepConfig|
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// configuration entry pointed by |p_cfg|.
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bool A2DP_InitCodecConfigAacSink(AvdtpSepConfig* p_cfg);
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#endif // A2DP_AAC_H
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