From 153b468930a9df22debb28889312f8a5c511ee04 Mon Sep 17 00:00:00 2001
From: Eric Curtin <ecurtin@redhat.com>
Date: Fri, 20 May 2022 20:01:06 +0100
Subject: cam: sdl_sink: Add MJPG support to SDL sink

So we have at least two supported capturing pixel formats (although
many possible output pixel formats thanks to SDL conversion). MJPG
support only built in if SDL2_image is available, provides
decompression.

Signed-off-by: Eric Curtin <ecurtin@redhat.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Tested-by: Jacopo Mondi <jacopo@jmondi.org>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
 src/cam/sdl_texture_mjpg.cpp | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 src/cam/sdl_texture_mjpg.cpp

(limited to 'src/cam/sdl_texture_mjpg.cpp')

diff --git a/src/cam/sdl_texture_mjpg.cpp b/src/cam/sdl_texture_mjpg.cpp
new file mode 100644
index 00000000..69e99ad3
--- /dev/null
+++ b/src/cam/sdl_texture_mjpg.cpp
@@ -0,0 +1,25 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2022, Ideas on Board Oy
+ *
+ * sdl_texture_mjpg.cpp - SDL Texture MJPG
+ */
+
+#include "sdl_texture_mjpg.h"
+
+#include <SDL2/SDL_image.h>
+
+using namespace libcamera;
+
+SDLTextureMJPG::SDLTextureMJPG(const SDL_Rect &rect)
+	: SDLTexture(rect, SDL_PIXELFORMAT_RGB24, 0)
+{
+}
+
+void SDLTextureMJPG::update(const Span<uint8_t> &data)
+{
+	SDL_RWops *bufferStream = SDL_RWFromMem(data.data(), data.size());
+	SDL_Surface *frame = IMG_Load_RW(bufferStream, 0);
+	SDL_UpdateTexture(ptr_, nullptr, frame->pixels, frame->pitch);
+	SDL_FreeSurface(frame);
+}
-- 
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