https://www.speex.org/

Version: 1.2.0

Speex is an Open Source/Free Software patent-free audio compression format designed for speech. The Speex Project aims to lower the barrier of entry for voice applications by providing a free alternative to expensive proprietary speech codecs. Moreover, Speex is well-adapted to Internet applications and provides useful features that are not present in most other codecs. Finally, Speex is part of the GNU Project and is available under the revised BSD license.

Clone this repository into components subdir of yout project:

cd ~/my_esp_idf_project
mkdir components
cd components
git clone [email protected]:UncleRus/esp-idf-speex.git

Or clone it to any other directory and add it to your project Makefile or CMakeLists.txt:

PROJECT_NAME := my-esp-project
EXTRA_COMPONENT_DIRS := $(HOME)/my/work/path/esp-idf-speex
include $(IDF_PATH)/make/project.mk

cmake_minimum_required(VERSION 3.5)
set(EXTRA_COMPONENT_DIRS $ENV{HOME}/my/work/path/esp-idf-speex)
include($ENV{IDF_PATH}/tools/cmake/project.cmake)
project(my-esp-project)

See examples.