Remove lc3 decoder implementation. (06e59d69) · Commits · e / os / android_packages_modules_Bluetooth

system/audio_hal_interface/fuzzer/Android.bp

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		@@ -70,7 +70,6 @@ cc_defaults {
		"libg722codec",
		"libudrv-uipc",
		"libbt-common",
		"liblc3codec",
		"liblc3",
		"libstatslog_bt",
		"libvndksupport",

system/bta/Android.bp

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		@@ -644,7 +644,6 @@ cc_test {
		"libbt-protos-lite",
		"libflatbuffers-cpp",
		"libosi",
		"liblc3codec",
		"liblc3",
		],
		data: [

system/btif/Android.bp

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		@@ -247,7 +247,6 @@ cc_test {
		"libbt-utils",
		"libFraunhoferAAC",
		"libg722codec",
		"liblc3codec",
		"liblc3",
		"libbtdevice",
		"libbt-hci",

system/embdrv/lc3_dec/Android.bp

deleted100644 → 0

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		package {
		// See: http://go/android-license-faq
		// A large-scale-change added 'default_applicable_licenses' to import
		// all of the 'license_kinds' from "system_bt_license"
		// to get the below license kinds:
		// SPDX-license-identifier-Apache-2.0
		default_applicable_licenses: ["system_bt_license"],
		}

		cc_library_static {
		name: "liblc3codec",
		host_supported: true,
		apex_available: [

		"//apex_available:platform",
		"com.android.bluetooth"
		],
		defaults: ["fluoride_defaults"],
		srcs: [
		"Common/*.cpp",
		"Common/fft/*.c",
		"Common/Tables/*.cpp",
		"Decoder/*.cpp",
		"TestSupport/DatapointsAndroid.cpp",
		],
		cflags: [
		"-Werror",
		"-Wmissing-braces",
		"-Wno-unused-parameter",
		"-Wno-#warnings",
		"-Wuninitialized",
		"-Wno-self-assign",
		"-Wno-implicit-fallthrough",
		],
		target: {
		android: {
		sanitize: {
		misc_undefined:[
		"unsigned-integer-overflow",
		"signed-integer-overflow",
		"bounds",
		],
		cfi: true,
		},
		},
		},
		shared_libs: [
		"liblog",
		],
		export_include_dirs: [
		"Api",
		"Common",
		"Common/fft",
		"Common/Tables",
		"TestSupport",
		],
		}

		cc_fuzz {
		name: "liblc3codec_decoder_fuzzer",

		srcs: [
		"fuzzer/liblc3codec_decoder_fuzzer.cpp",
		],

		static_libs: [
		"liblc3codec",
		],
		}
		No newline at end of file

system/embdrv/lc3_dec/Api/Lc3Config.hpp

deleted100644 → 0

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		/*
		* Lc3Config.hpp
		*
		* Copyright 2021 HIMSA II K/S - www.himsa.com. Represented by EHIMA -
		* www.ehima.com
		*
		* 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.
		*/

		#ifndef __LC3_CONFIG_HPP_
		#define __LC3_CONFIG_HPP_

		#include <cstdint>

		/*
		* The LC3 encoder and decoder have a common set of essential session
		* configuration parameters - see LC3 specification Sections 2.2 "Encoder
		* interfaces" and Section 2.4 "Decoder interfaces" (dr09r07). The set of common
		* session configuration parameters is represented by an instance of class
		* Lc3Config.
		*
		* Lc3Config is designed such that all parameters need to be
		* providing when constructing an instance. Afterwards, success of creation,
		* the actual parameter values, and derived parameter values are provided
		* by corresponding const getter methods or public const fields.
		*
		* When parameters need to be changes, a new instance of Lc3Config has to be
		* created.
		*
		* Instances of Lc3Config are provided to instances of Lc3Encoder and Lc3Decoder
		* when constructing them.
		*
		* The main purpose of Lc3Config is to verify and handle common LC3 session
		* configuration parameters in a consistent way.
		*
		*/
		class Lc3Config {
		public:
		/*
		* Enumeration of supported frame durations N_ms = 7.5ms and N_ms = 10ms.
		*
		* Note: although the LC3 specification describes frame duration N_ms as
		* a parameter with floating point values 7.5 and 10.0, we decided
		* to make this parameter a discrete enumeration of supported
		* frame durations. There are too many codec parts that need
		* specifically listed constants dependent on the configured
		* frame duration, so that it never will be possible to chose from a
		* larger set of floating point values for N_ms.
		* Making the data type of N_ms an enumeration supports
		* straight forwards verification that meaningful parameters are given.
		*/
		enum class FrameDuration { d10ms, d7p5ms };

		// configuration error (see "getErrorStatus")
		static const uint8_t ERROR_FREE = 0x00;
		static const uint8_t INVALID_SAMPLING_RATE = 0x01;
		static const uint8_t INVALID_FRAME_DURATION = 0x02;
		static const uint8_t INVALID_NUMBER_OF_CHANNELS = 0x04;

		/*
		* Constructor of an instance of Lc3Config
		* Parameters:
		* (see also see LC3 specification Sections 2.2 "Encoder interfaces"
		* and Section 2.4 "Decoder interfaces" (dr09r07) )
		*
		* Fs_ : Sampling frequency in Hz -> defines public constant Fs
		* Supported values are
		* 8000 Hz
		* 16000 Hz
		* 24000 Hz
		* 32000 Hz
		* 44100 Hz
		* 48000 Hz
		*
		* N_ms_ : Frame duration given by value from enumeration FrameDuration (see
		* above)
		* -> defines public constant N_ms
		* Supported values see enumeration FrameDuration.
		*
		* Nc_ : Number of channels -> defines public constant Nc
		* Supported values are Nc > 0 and Nc < 256 such that device
		* resources are not exhausted. Notes:
		* - Exhausting device resources can mean that there is not enough
		* memory to instantiate the corresponding number of encoders and/or decoders,
		* but also that computing the encoders and/or decoders in real-time is not
		* possible.
		* - The parameter N_c_max described in the LC3 specifciation is
		* not given here, since there is too little knowledge on the target devices
		* where this code may be used.
		*
		*/
		Lc3Config(uint16_t Fs_, FrameDuration N_ms_, uint8_t Nc_);

		// no default constructor supported
		Lc3Config() = delete;

		// Destructor
		virtual ~Lc3Config();

		/*
		* Getter "isValid" provides a convenience function that returns true when an
		* instance of Lc3Config could be created without error.
		*/
		bool isValid() const;

		/*
		* Getter "getErrorStatus" provides details on the success of instantiating
		* Lc3Config. The possible return values are listed as constants in this class
		* (see configuration error constants above)
		*/
		uint8_t getErrorStatus() const;

		/*
		* Getter "getByteCountFromBitrate" provides the number of bytes available in
		* one encoded frame of one channel (see "nbytes" as described in
		* Section 3.2.5 "Bit budget and bitrate" (dr09r07) )
		*
		* The number of bytes "nbytes" to use for encoding a single channel is a
		* required external input to each single channel LC3 encoder. The same number
		* of bytes (now to be used for decoding) is also a required external input to
		* each single channel LC3 decoder. The corresponding number of bits available
		* in one frame is thus "nbits 8*nbytes". The codec works on a byte boundary,
		* i.e. the variable "nbytes" shall be an integer number. A certain "bitrate"
		* can be converted to a number of bytes "nbytes" where the number of bytes is
		* rounded towards the nearest lower integer.
		*
		* The algorithm is verified from the bitrate corresponding to
		* nbytes = 20 up to the bitrate corresponding to
		* nbytes = 400 per channel for all sampling rates.
		* The LC3 specification does not specify or recommend what bitrate to use for
		* encoding a frame of audio samples. This is specified by the profiles making
		* use of the LC3.
		*/
		uint16_t getByteCountFromBitrate(
		uint32_t bitrate) const; // meant for a single channel

		/*
		* Getter "getBitrateFromByteCount" provides the bitrate of the codec in bits
		* per second of one channel (see Section 3.2.5 "Bit budget and bitrate"
		* (dr1.0r03) )
		*
		* This is a convenience utility and not directly used by the LC3
		* implementation.
		*
		* The bitrate of the codec in bits per second is
		* "bitrate = ceil(nbits / frame_duration) = ceil(nbits*Fs/NF) =
		* ceil(8nbytesFs/NF)".
		*
		* The LC3 specification does not specify or recommend what bitrate to use for
		* encoding a frame of audio samples. This is specified by the profiles making
		* use of the LC3.
		*/
		uint32_t getBitrateFromByteCount(uint16_t nbytes) const;

		/*
		* Getter "getFscal" provides a utility used within the LC3 implementation
		* for easier parameter mapping when Fs == 44100
		* (see Section 3.2.2 "Sampling rates" (dr1.0r03) )
		*/
		double getFscal() const;

		/*
		* Getter "getNmsValue" provides a utility used within the LC3 implementation
		* that converts FrameDuration N_ms enumeration values to duration values in
		* milliseconds.
		*/
		double getNmsValue() const;

		private:
		// internal utilities used for verifying the given input parameters and
		// computing derived parameters
		uint8_t getFs_ind(uint16_t Fs);
		uint16_t getNF(uint16_t Fs, FrameDuration N_ms);
		uint16_t getNE(uint16_t NF, FrameDuration N_ms);

		// errors status set during construction and returned by getErrorStatus()
		uint8_t errorStatus;

		public:
		// configuration details -> see also Section 3.1.2 "Mathematical symbols"
		// (dr09r07)
		const uint16_t Fs; // Sampling rate (in Hz)
		const uint8_t Fs_ind; // Sampling rate index (see also Section 3.2.2
		// "Sampling rates" (dr09r07)
		const FrameDuration N_ms; // Frame duration -> see Lc3Config constructor
		// documentation Note: that the actual frame
		// duration is longer by a factor of 480/441
		// if the sampling rate is 44100 Hz
		const uint16_t NF; // Number of samples processed in one frame of one channel
		// (also known as frame size)
		const uint16_t
		NE; // Number of encoded spectral lines (per frame and channel)
		const uint16_t Z; // Number of leading zeros in MDCT window
		const uint8_t Nc; // Number of channels
		const uint8_t N_b; // Number of bands
		};

		#endif // __LC3_CONFIG_HPP_