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229 lines
10 KiB
229 lines
10 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 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 A2dpCodecConfigAac : public A2dpCodecConfig { |
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public: |
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A2dpCodecConfigAac(btav_a2dp_codec_priority_t codec_priority); |
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virtual ~A2dpCodecConfigAac(); |
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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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// 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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// Builds A2DP preferred AAC Sink capability from AAC 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_BuildSrc2SinkConfigAac(const uint8_t* p_src_cap, |
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uint8_t* p_pref_cfg); |
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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 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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// Computes the number of frames to process in a time window for the A2DP |
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// AAC 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_GetSinkFramesCountToProcessAac(uint64_t time_interval_ms, |
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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 and displays A2DP AAC codec info when using |LOG_DEBUG|. |
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// |p_codec_info| is a pointer to the AAC 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_DumpCodecInfoAac(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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// 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 Source codec name. |
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const char* A2DP_CodecIndexStrAac(void); |
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// Initializes A2DP AAC Source codec information into |tAVDT_CFG| |
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// configuration entry pointed by |p_cfg|. |
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bool A2DP_InitCodecConfigAac(tAVDT_CFG* p_cfg); |
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#endif // A2DP_AAC_H
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