Squashed 'rtengine/libraw/' content from commit cccb97647

git-subtree-dir: rtengine/libraw
git-subtree-split: cccb97647fcee56801fa68231fa8a38aa8b52ef7

samples/openbayer_sample.cpp

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+/* -*- C++ -*-
+ * File: openvayer_sample.cpp
+ * Copyright 2008-2021 LibRaw LLC (info@libraw.org)
+ * Created: Feb 11, 2020
+ *
+ * LibRaw simple C++ API:  opens bayer data (Kodak KAI-0340 sensor) from buffer,
+dump as 8-bit tiff
+
+LibRaw is free software; you can redistribute it and/or modify
+it under the terms of the one of two licenses as you choose:
+
+1. GNU LESSER GENERAL PUBLIC LICENSE version 2.1
+   (See file LICENSE.LGPL provided in LibRaw distribution archive for details).
+
+2. COMMON DEVELOPMENT AND DISTRIBUTION LICENSE (CDDL) Version 1.0
+   (See file LICENSE.CDDL provided in LibRaw distribution archive for details).
+
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <math.h>
+
+#include "libraw/libraw.h"
+
+#ifndef LIBRAW_WIN32_CALLS
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+#endif
+
+int main(int ac, char *av[])
+{
+  if (ac != 2)
+    return 1;
+  FILE *in = fopen(av[1], "rb");
+  fseek(in, 0, SEEK_END);
+  unsigned fsz = ftell(in);
+  unsigned char *buffer = (unsigned char *)malloc(fsz);
+  if (!buffer)
+    return 2;
+  fseek(in, 0, SEEK_SET);
+  unsigned readb = fread(buffer, 1, fsz, in);
+  if (readb != fsz)
+    return 3;
+  LibRaw rp;
+  rp.imgdata.params.output_tiff = 1;
+  int ret = rp.open_bayer(buffer, fsz, 640, 480, 0, 0, 0, 0, 0,
+                          LIBRAW_OPENBAYER_RGGB, 0, 0, 1400);
+  if (ret != LIBRAW_SUCCESS)
+    return 4;
+  if ((ret = rp.unpack()) != LIBRAW_SUCCESS)
+    printf("Unpack error: %d\n", ret);
+
+  if ((ret = rp.dcraw_process()) != LIBRAW_SUCCESS)
+    printf("Processing error: %d\n", ret);
+
+  char outfn[256];
+  sprintf(outfn, "%s.tif", av[1]);
+  if (LIBRAW_SUCCESS != (ret = rp.dcraw_ppm_tiff_writer(outfn)))
+    printf("Cannot write %s: %s\n", outfn, libraw_strerror(ret));
+  else
+    printf("Created %s\n", outfn);
+}