KittenTTS module.

.github/workflows/ci.yml

@@ -78,6 +78,7 @@ jobs:
                         gettext help2man texinfo texlive texlive-plain-generic
                         nlohmann-json3-dev librubberband-dev
                         pulseaudio ${{ matrix.deps }}
+                        libonnxruntime-dev libxml2-dev
     - name: install piper
       run: |
         wget https://github.com/OHF-Voice/piper1-gpl/archive/refs/tags/v1.7.0.tar.gz
@@ -144,6 +145,7 @@ jobs:
                         libdotconf-dev libglib2.0-dev libltdl-dev- libsystemd-dev systemd
                         gettext help2man texinfo texlive texlive-plain-generic
                         pulseaudio
+                        libonnxruntime-dev libxml2-dev
     - name: autoconf
       run: ./build.sh
     - name: configure

config/modules/kittentts.conf

@@ -0,0 +1,5 @@
+modelPath "/usr/share/kitten"
+
+AddVoiceFile "Normal" "kitten_tts_micro_v0_8.onnx" "95481626fee1ba70ce683e69c534fc7cb38433c46ce42d3abbeafb4b9f1a4123" "voices_micro.bin" "12ad10f1fcce8a458b5cf79769b8edd4ba0e11e9fb6532fd192c3500b2b37a5d"
+AddVoiceFile "High" "kitten_tts_mini_v0_8.onnx" "0f5bbae4fc4800c98dbc544a87ecfa79510de2fb8222db30d12e5bfe9177df91" "voices_mini.bin" "0e4965b46333db53ce09c73842623bf7055ea62c67f78803cb7ea9c16da6ac2b"
+AddVoiceFile "Low" "kitten_tts_nano_v0_2.onnx" "42fa8809db319cd7c4c83b3c501e2313bf90edf610235291cad605e4adcb242d" "voices_nano.bin" "42a40a24a352a38657d6cb86ceee51bbc2b7780b29e04fb60bcdf959adccea01"

configure.ac

@@ -56,6 +56,7 @@ if test "$enable_libs_only" = "yes"; then
 	with_baratinoo=no
 	with_kali=no
 	with_piper=no
+	with_kitten=no
 
 	with_pulse=no
 	with_alsa=no
@@ -425,6 +426,29 @@ AM_CONDITIONAL([kali_support], [test $with_kali != no])
 AM_CONDITIONAL([kali_shim], [test $with_kali = shim])
 AS_IF([test $with_kali != no], [output_modules="${output_modules} kali"])
 
+# check for kitten support
+AC_ARG_WITH([kitten],
+  [AS_HELP_STRING([--with-kitten], [Compile with KittenTTS support])],
+  [],
+  [with_kitten=check])
+AS_IF([test $with_kitten != "no"],
+  [PKG_CHECK_MODULES([LIBONNXRUNTIME], [libonnxruntime],
+      [kitten_libonnxruntime="yes"],
+      [AS_IF([test $with_kitten = "yes"],
+        [AC_MSG_FAILURE([libonnxruntime is not available])])])
+   PKG_CHECK_MODULES([LIBXML], [libxml-2.0],
+      [kitten_libxml="yes"],
+      [AS_IF([test $with_kitten = "yes"],
+        [AC_MSG_FAILURE([libxml-2.0 is not available])])])
+   AS_IF([test "x$kitten_libonnxruntime" = "xyes" -a "x$kitten_libxml" = "xyes"],
+     [with_kitten="yes"])])
+AM_CONDITIONAL([kitten_support], [test $with_kitten = "yes"])
+AC_SUBST([LIBONNXRUNTIME_CFLAGS])
+AC_SUBST([LIBONNXRUNTIME_LIBS])
+AC_SUBST([LIBXML_CFLAGS])
+AC_SUBST([LIBXML_LIBS])
+AS_IF([test $with_kitten = "yes"], [output_modules="${output_modules} kitten"])
+
 # check for piper support
 AC_ARG_WITH([piper],
 	[AS_HELP_STRING([--with-piper[[=yes|no|check|/path]]], [include Piper TTS support])],

src/modules/.gitignore

@@ -42,6 +42,7 @@
 /sd_kali
 /sd_openjtalk
 /sd_pico
+/sd_kittentts
 /sd_skeleton0
 /sd_skeleton0_espeak-ng-async
 /sd_skeleton0_espeak-ng-async-server

src/modules/Makefile.am

@@ -24,6 +24,7 @@ EXTRA_DIST += voxin_shim.c voxin.h
 EXTRA_DIST += module_utils.h
 EXTRA_DIST += dummy-message-default.wav
 EXTRA_DIST += dummy-message.txt
+EXTRA_DIST += kitten.h
 CLEANFILES = dummy-message.wav
 
 if HAVE_PYTHON
@@ -133,6 +134,16 @@ sd_flite_LDADD = $(top_builddir)/src/common/libcommon.la \
 	$(common_LDADD)
 endif
 
+#
+# kitten tts module
+#
+if kitten_support
+modulebin_PROGRAMS += sd_kittentts
+sd_kittentts_SOURCES = kitten_server.c kitten_utilities.c kitten_model.c kitten_worker.c
+sd_kittentts_CFLAGS = $(ESPEAK_NG_CFLAGS) $(GLIB_CFLAGS) $(LIBONNXRUNTIME_CFLAGS) $(LIBXML_CFLAGS) $(DOTCONF_CFLAGS)
+sd_kittentts_LDADD = $(top_builddir)/src/common/libcommon_la-common.o libspeechd_module.la $(ESPEAK_NG_LIBS) $(EXTRA_ESPEAK_LIBS) $(GLIB_LIBS) $(LIBONNXRUNTIME_LIBS) $(LIBXML_LIBS) $(DOTCONF_LIBS)
+endif
+
 #
 # ibmtts module
 #

src/modules/README.kitten.md

@@ -0,0 +1,49 @@
+# Module conf file options.
+
+The modules dot conf file can be used to configure the module using `AddVoiceFile` and `modelPath`. `AddVoiceFile` let you set models/voices in the case of updated models. `modelPath` let you set the modes/voices search path.
+
+## AddVoiceFile
+
+AddVoiceFile should be formated like such.
+```
+AddVoiceFile "voice_quality" "model filename" "model sha256" "voices filename" "voices sha256"
+```
+
+you can find an example config here using `AddVoiceFile`
+
+```
+AddVoiceFile "Normal" "kitten_tts_micro_v0_8.onnx" "95481626fee1ba70ce683e69c534fc7cb38433c46ce42d3abbeafb4b9f1a4123" "voices_micro.bin" "12ad10f1fcce8a458b5cf79769b8edd4ba0e11e9fb6532fd192c3500b2b37a5d"
+AddVoiceFile "High" "kitten_tts_mini_v0_8.onnx" "0f5bbae4fc4800c98dbc544a87ecfa79510de2fb8222db30d12e5bfe9177df91" "voices_mini.bin" "0e4965b46333db53ce09c73842623bf7055ea62c67f78803cb7ea9c16da6ac2b"
+AddVoiceFile "Low" "kitten_tts_nano_v0_2.onnx" "42fa8809db319cd7c4c83b3c501e2313bf90edf610235291cad605e4adcb242d" "voices_nano.bin" "42a40a24a352a38657d6cb86ceee51bbc2b7780b29e04fb60bcdf959adccea01"
+```
+
+## modelPath
+
+modelPath should be formated like such.
+```
+modelPath "<your path>"
+```
+
+you can find an example config here using `modelPath`
+
+```
+modelPath "/usr/share/kitten"
+```
+
+## Example configuration file
+
+Full example configuation using all options.
+
+`kittentts.conf`
+
+```
+modelPath "/usr/share/kitten"
+
+AddVoiceFile "Normal" "kitten_tts_micro_v0_8.onnx" "95481626fee1ba70ce683e69c534fc7cb38433c46ce42d3abbeafb4b9f1a4123" "voices_micro.bin" "12ad10f1fcce8a458b5cf79769b8edd4ba0e11e9fb6532fd192c3500b2b37a5d"
+AddVoiceFile "High" "kitten_tts_mini_v0_8.onnx" "0f5bbae4fc4800c98dbc544a87ecfa79510de2fb8222db30d12e5bfe9177df91" "voices_mini.bin" "0e4965b46333db53ce09c73842623bf7055ea62c67f78803cb7ea9c16da6ac2b"
+AddVoiceFile "Low" "kitten_tts_nano_v0_2.onnx" "42fa8809db319cd7c4c83b3c501e2313bf90edf610235291cad605e4adcb242d" "voices_nano.bin" "42a40a24a352a38657d6cb86ceee51bbc2b7780b29e04fb60bcdf959adccea01"
+```
+
+# Downloading models+voices.
+
+A simple downloader for downloading the models and voices is provided [here](https://github.com/jsett/kitten_models_downloader)

src/modules/kitten.h

@@ -0,0 +1,158 @@
+/*
+The MIT License (MIT)
+
+Copyright © 2026 John Settlemyer
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
+
+#include <glib/gstdio.h>
+#include <unistd.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <errno.h>
+#include <stdbool.h>
+#include <glib.h>
+#include <onnxruntime_c_api.h>
+#include <inttypes.h>
+#include <sndfile.h>
+#include <libxml/parser.h>
+#include <libxml/tree.h>
+#include <espeak-ng/espeak_ng.h>
+#include <espeak-ng/speak_lib.h>
+#include "module_utils.h"
+
+#include <speechd_types.h>
+#include "spd_module_main.h"
+
+#define CHECK_STATUS(expr) \
+    do { \
+        OrtStatus* status = (expr); \
+        if (status != NULL) { \
+            const char* msg = g_ort->GetErrorMessage(status); \
+            MSG(2, "ERROR: ONNX Runtime Error: %s\n", msg); \
+            g_ort->ReleaseStatus(status); \
+            exit(1); \
+        } \
+    } while (0)
+
+extern int model_type;
+extern int ROWS;
+#define COLS 256
+
+#define PAD "$"
+#define PUNCTUATION ";:,.!?¡¿—…\"«»\"\" "
+#define LETTERS "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
+#define LETTERS_IPA "ɑɐɒæɓʙβɔɕçɗɖðʤəɘɚɛɜɝɞɟʄɡɠɢʛɦɧħɥʜɨɪʝɭɬɫɮʟɱɯɰŋɳɲɴøɵɸθœɶʘɹɺɾɻʀʁɽʂʃʈʧʉʊʋⱱʌɣɤʍχʎʏʑʐʒʔʡʕʢǀǁǂǃˈˌːˑʼʴʰʱʲʷˠˤ˞↓↑→↗↘'̩'ᵻ"
+
+#define SYMBOLS PAD PUNCTUATION LETTERS LETTERS_IPA
+
+// setting var's
+extern float speed;
+//['Leo','Kiki','Hugo','Rosie','Bruno','Luna','Jasper','Bella']
+extern GString *voice;
+extern GString *voice_setting;
+// paths var's
+extern GString *model_path;
+extern GString *voices_path;
+extern const char *home_dir;
+extern GString *model_dir;
+
+extern GString *distro_target_subdir;
+
+extern bool stop_generation;
+
+// holds and array of values that must be passed to the model based off the requested voice and length of the text.
+extern float *voice_styles;
+
+extern const OrtApi* g_ort;
+extern OrtEnv* env;
+extern OrtSessionOptions* session_options;
+extern OrtSession* session;
+
+extern GHashTable *files_hash_table;
+
+extern bool debug_module;
+
+#define DEBUG_PRINT(...) \
+    do { \
+        if (debug_module) { \
+            MSG(5, __VA_ARGS__); \
+        } \
+    } while (0)
+
+#define TARGET_SUBDIR ".cache/speech-dispatcher/kitten"
+
+typedef struct {
+    const char *quality;
+    const char *model_filename;
+    const char *model_expected_sha256;
+    const char *voice_filename;
+    const char *voice_expected_sha256;
+} FileInfo;
+
+#define VOICE_LIST(X) \
+    X(Leo)            \
+    X(Kiki)           \
+    X(Hugo)           \
+    X(Rosie)          \
+    X(Bruno)          \
+    X(Luna)           \
+    X(Jasper)         \
+    X(Bella)          \
+    X(Leo_Low)        \
+    X(Kiki_Low)       \
+    X(Hugo_Low)       \
+    X(Rosie_Low)      \
+    X(Bruno_Low)      \
+    X(Luna_Low)       \
+    X(Jasper_Low)     \
+    X(Bella_Low)      \
+    X(Leo_High)       \
+    X(Kiki_High)      \
+    X(Hugo_High)      \
+    X(Rosie_High)     \
+    X(Bruno_High)     \
+    X(Luna_High)      \
+    X(Jasper_High)    \
+    X(Bella_High)
+
+#define DEFINE_VOICE(name_token) static SPDVoice voice_##name_token = { .name = #name_token, .language = "en" };
+#define VOICE_PTR_ITEM(name_token) &voice_##name_token,
+
+// kitten_utilities.c
+void init_file_hashtable_and_distro_subdir(void);
+int init_paths(void);
+void build_hash_from_defaults(GHashTable *ht);
+void file_hash_add_sub_key(GHashTable *ht, const char* quality, const char* key, const char* value);
+char* file_hash_get_value(GHashTable *ht, const char* quality, const char* key);
+
+// kitten_model.c
+int init_voice_style(const char* voices_path);
+void cleanup_voice_style();
+GArray *get_style(const char *text, const char *voice);
+GArray *get_char_indices(const gchar *locate, const gchar *index_str);
+GString *get_phonemes(const char *text);
+int init_model(const char* model_path);
+void cleanup_model();
+GArray* run_model(GArray *inputs_array, GArray *styles_array, float speed);
+void convert_float_to_short(const float* in_buffer, GArray* out_buffer, size_t num_samples);
+GArray* kitten_speak(const char* data);
+int reload_models_and_voices(const char *model_filename, const char* voice_filename);
+
+// kitten_worker.c
+int init_model_thread_pool();
+int cleanup_threads();
+int model_change_voice(const char *var, const char *val);
+int model_change_speed(const char *var, const char *val);
+int add_generate_speech_task(const char* data, size_t bytes);
+int model_stop_generation();