From cb2a2126f293663d1607d0040250094da82b9a84 Mon Sep 17 00:00:00 2001
From: Michael Forney <mforney@mforney.org>
Date: Sat, 7 Nov 2020 14:23:34 -0800
Subject: [PATCH] Libretro: Only set camera peripheral when it is available
 (#1931)

Otherwise, if the frontend does not support GET_CAMERA_INTERFACE,
the start and stop functions are NULL, causing a crash when a gameboy
ROM is unloaded.
---
 src/platform/libretro/libretro.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/platform/libretro/libretro.c b/src/platform/libretro/libretro.c
index 6046dd929..db2d88d32 100644
--- a/src/platform/libretro/libretro.c
+++ b/src/platform/libretro/libretro.c
@@ -614,9 +614,10 @@ bool retro_load_game(const struct retro_game_info* game) {
 		cam.width = GBCAM_WIDTH;
 		cam.caps = 1 << RETRO_CAMERA_BUFFER_RAW_FRAMEBUFFER;
 		cam.frame_raw_framebuffer = _updateCamera;
-		core->setPeripheral(core, mPERIPH_IMAGE_SOURCE, &imageSource);
+		if (environCallback(RETRO_ENVIRONMENT_GET_CAMERA_INTERFACE, &cam)) {
+			core->setPeripheral(core, mPERIPH_IMAGE_SOURCE, &imageSource);
+		}
 
-		environCallback(RETRO_ENVIRONMENT_GET_CAMERA_INTERFACE, &cam);
 		const char* modelName = mCoreConfigGetValue(&core->config, "gb.model");
 		struct GB* gb = core->board;