Fix possible crash with VideoPlayer _mix_audio function

1 files changed, 18 insertions, 39 deletions

diff --git a/scene/gui/video_player.cpp b/scene/gui/video_player.cpp
index 39e7c73390..812ca0042b 100644
--- a/scene/gui/video_player.cpp
+++ b/scene/gui/video_player.cpp
@@ -90,53 +90,32 @@ void VideoPlayer::_mix_audio() {
 
 	AudioFrame vol = AudioFrame(volume, volume);
 
-	// Copy to server's audio buffer
-	switch (AudioServer::get_singleton()->get_speaker_mode()) {
+	int cc = AudioServer::get_singleton()->get_channel_count();
 
-		case AudioServer::SPEAKER_MODE_STEREO: {
-			AudioFrame *target = AudioServer::get_singleton()->thread_get_channel_mix_buffer(bus_index, 0);
+	if (cc == 1) {
+		AudioFrame *target = AudioServer::get_singleton()->thread_get_channel_mix_buffer(bus_index, 0);
+		ERR_FAIL_COND(!target);
 
-			for (int j = 0; j < buffer_size; j++) {
+		for (int j = 0; j < buffer_size; j++) {
 
-				target[j] += buffer[j] * vol;
-			}
-
-		} break;
-		case AudioServer::SPEAKER_SURROUND_31: {
-
-			// FIXME: Implement
-		} break;
-		case AudioServer::SPEAKER_SURROUND_51: {
-
-			AudioFrame *targets[2] = {
-				AudioServer::get_singleton()->thread_get_channel_mix_buffer(bus_index, 1),
-				AudioServer::get_singleton()->thread_get_channel_mix_buffer(bus_index, 2),
-			};
-
-			for (int j = 0; j < buffer_size; j++) {
+			target[j] += buffer[j] * vol;
+		}
 
-				AudioFrame frame = buffer[j] * vol;
-				targets[0][j] = frame;
-				targets[1][j] = frame;
-			}
-		} break;
-		case AudioServer::SPEAKER_SURROUND_71: {
+	} else {
+		AudioFrame *targets[4];
 
-			AudioFrame *targets[3] = {
-				AudioServer::get_singleton()->thread_get_channel_mix_buffer(bus_index, 1),
-				AudioServer::get_singleton()->thread_get_channel_mix_buffer(bus_index, 2),
-				AudioServer::get_singleton()->thread_get_channel_mix_buffer(bus_index, 3)
-			};
+		for (int k = 0; k < cc; k++) {
+			targets[k] = AudioServer::get_singleton()->thread_get_channel_mix_buffer(bus_index, k);
+			ERR_FAIL_COND(!targets[k]);
+		}
 
-			for (int j = 0; j < buffer_size; j++) {
+		for (int j = 0; j < buffer_size; j++) {
 
-				AudioFrame frame = buffer[j] * vol;
-				targets[0][j] += frame;
-				targets[1][j] += frame;
-				targets[2][j] += frame;
+			AudioFrame frame = buffer[j] * vol;
+			for (int k = 0; k < cc; k++) {
+				targets[k][j] += frame;
 			}
-
-		} break;
+		}
 	}
 }