From d45e92c10c90f3f951040cbae6684c40d3355fe9 Mon Sep 17 00:00:00 2001
From: Clayton Groeneveld <claytong1214@gmail.com>
Date: Wed, 17 Nov 2021 01:01:46 -0600
Subject: [PATCH] libobs: Add raw audio callback function

This complements the already existing raw video callback function.
---
 docs/sphinx/reference-core.rst | 12 ++++++++++++
 libobs/obs.c                   | 16 ++++++++++++++++
 libobs/obs.h                   |  8 ++++++++
 3 files changed, 36 insertions(+)

diff --git a/docs/sphinx/reference-core.rst b/docs/sphinx/reference-core.rst
index 8d19beada..0dd6a0b70 100644
--- a/docs/sphinx/reference-core.rst
+++ b/docs/sphinx/reference-core.rst
@@ -473,6 +473,18 @@ Video, Audio, and Graphics
    :param callback:   The callback that receives raw video frames.
    :param param:      The private data associated with the callback.
 
+---------------------
+
+.. function:: void obs_add_raw_audio_callback(size_t mix_idx, const struct audio_convert_info *conversion, audio_output_callback_t callback, void *param)
+              void obs_remove_raw_raw_callback(size_t track, audio_output_callback_t callback, void *param)
+
+   Adds/removes a raw audio callback.  Allows the ability to obtain raw
+   audio data without necessarily using an output.
+
+   :param mix_idx:    Specifies audio track to get data from.
+   :param conversion: Specifies conversion requirements.  Can be NULL.
+   :param callback:   The callback that receives raw audio data.
+   :param param:      The private data associated with the callback.
 
 Primary signal/procedure handlers
 ---------------------------------
diff --git a/libobs/obs.c b/libobs/obs.c
index f37314717..fc7dbf9ba 100644
--- a/libobs/obs.c
+++ b/libobs/obs.c
@@ -2389,6 +2389,22 @@ void obs_remove_raw_video_callback(void (*callback)(void *param,
 	stop_raw_video(video->video, callback, param);
 }
 
+void obs_add_raw_audio_callback(size_t mix_idx,
+				const struct audio_convert_info *conversion,
+				audio_output_callback_t callback, void *param)
+{
+	struct obs_core_audio *audio = &obs->audio;
+	audio_output_connect(audio, mix_idx, conversion, callback, param);
+}
+
+void obs_remove_raw_audio_callback(size_t mix_idx,
+				   audio_output_callback_t callback,
+				   void *param)
+{
+	struct obs_core_audio *audio = &obs->audio;
+	audio_output_disconnect(audio, mix_idx, callback, param);
+}
+
 void obs_apply_private_data(obs_data_t *settings)
 {
 	if (!settings)
diff --git a/libobs/obs.h b/libobs/obs.h
index 4bbc78b24..bc45ab79f 100644
--- a/libobs/obs.h
+++ b/libobs/obs.h
@@ -768,6 +768,14 @@ EXPORT void obs_add_raw_video_callback(
 EXPORT void obs_remove_raw_video_callback(
 	void (*callback)(void *param, struct video_data *frame), void *param);
 
+EXPORT void
+obs_add_raw_audio_callback(size_t mix_idx,
+			   const struct audio_convert_info *conversion,
+			   audio_output_callback_t callback, void *param);
+EXPORT void obs_remove_raw_audio_callback(size_t mix_idx,
+					  audio_output_callback_t callback,
+					  void *param);
+
 EXPORT uint64_t obs_get_video_frame_time(void);
 
 EXPORT double obs_get_active_fps(void);