From 56df923cdb51a6b6abf2734217670d86dc25cc78 Mon Sep 17 00:00:00 2001
From: Hoan Luu Huu <110280845+xquanluu@users.noreply.github.com>
Date: Fri, 19 Jul 2024 21:22:59 +0700
Subject: [PATCH] support elevenlabs previous_text, next_text (#75)

---
 mod_elevenlabs_tts/elevenlabs_glue.cpp  |  6 ++++++
 mod_elevenlabs_tts/mod_elevenlabs_tts.c | 12 ++++++++++++
 mod_elevenlabs_tts/mod_elevenlabs_tts.h |  2 ++
 3 files changed, 20 insertions(+)

diff --git a/mod_elevenlabs_tts/elevenlabs_glue.cpp b/mod_elevenlabs_tts/elevenlabs_glue.cpp
index 9f72a1d..4e0322d 100644
--- a/mod_elevenlabs_tts/elevenlabs_glue.cpp
+++ b/mod_elevenlabs_tts/elevenlabs_glue.cpp
@@ -809,6 +809,12 @@ extern "C" {
     cJSON * jResult = cJSON_CreateObject();
     cJSON_AddStringToObject(jResult, "model_id", el->model_id);
     cJSON_AddStringToObject(jResult, "text", text);
+    if (el->previous_text) {
+      cJSON_AddStringToObject(jResult, "previous_text", el->previous_text);
+    }
+    if (el->next_text) {
+      cJSON_AddStringToObject(jResult, "next_text", el->next_text);
+    }
     if (el->similarity_boost || el->style || el->use_speaker_boost || el->stability) {
       cJSON * jVoiceSettings = cJSON_CreateObject();
       cJSON_AddItemToObject(jResult, "voice_settings", jVoiceSettings);
diff --git a/mod_elevenlabs_tts/mod_elevenlabs_tts.c b/mod_elevenlabs_tts/mod_elevenlabs_tts.c
index 62732c1..445cc7b 100644
--- a/mod_elevenlabs_tts/mod_elevenlabs_tts.c
+++ b/mod_elevenlabs_tts/mod_elevenlabs_tts.c
@@ -19,6 +19,8 @@ static void clearElevenlabs(elevenlabs_t* el, int freeAll) {
   if (el->style) free(el->style);
   if (el->use_speaker_boost) free(el->use_speaker_boost);
   if (el->optimize_streaming_latency) free(el->optimize_streaming_latency);
+  if (el->previous_text) free(el->previous_text);
+  if (el->next_text) free(el->next_text);
   if (el->ct) free(el->ct);
   if (el->reported_latency) free(el->reported_latency);
   if (el->request_id) free(el->request_id);
@@ -36,6 +38,8 @@ static void clearElevenlabs(elevenlabs_t* el, int freeAll) {
   el->style = NULL;
   el->use_speaker_boost = NULL;
   el->optimize_streaming_latency = NULL;
+  el->previous_text = NULL;
+  el->next_text = NULL;
   el->ct = NULL;
   el->reported_latency = NULL;
   el->request_id = NULL;
@@ -174,6 +178,14 @@ static void ell_text_param_tts(switch_speech_handle_t *sh, char *param, const ch
     if (el->optimize_streaming_latency) free(el->optimize_streaming_latency);
     el->optimize_streaming_latency = strdup(val);
   }
+  else if (0 == strcmp(param, "next_text")) {
+    if (el->next_text) free(el->next_text);
+    el->next_text = strdup(val);
+  }
+  else if (0 == strcmp(param, "previous_text")) {
+    if (el->previous_text) free(el->previous_text);
+    el->previous_text = strdup(val);
+  }
   else if (0 == strcmp(param, "write_cache_file") && switch_true(val)) {
     el->cache_audio = 1;
   }
diff --git a/mod_elevenlabs_tts/mod_elevenlabs_tts.h b/mod_elevenlabs_tts/mod_elevenlabs_tts.h
index c2b2429..876827d 100644
--- a/mod_elevenlabs_tts/mod_elevenlabs_tts.h
+++ b/mod_elevenlabs_tts/mod_elevenlabs_tts.h
@@ -17,6 +17,8 @@ struct elevenlabs_data {
   char* style;
   char* use_speaker_boost;
   char* optimize_streaming_latency;
+  char* previous_text;
+  char* next_text;
 
   /* result data */
   long response_code;