Write tjunittest output files to sdcard on Android

For tjunittest tests to complete successfully, they need to write
output image files to disk. On Android, only some parts of the
filesystem are write enabled. This commit sets the write path to
/sdcard (which is write enabled) when building
libjpeg_turbo_unittests for Android.

Bug: 993876
Change-Id: I87bb942311610bff089488d3e4d14dac523bf8aa

2 files changed, 19 insertions, 5 deletions

diff --git a/README.chromium b/README.chromium
index 7d44f3a..e4d3b2f 100644
--- a/README.chromium
+++ b/README.chromium
@@ -77,6 +77,7 @@ following changes which are not merged to upstream:
   - Refactor tjbench.c to provide test interface
   - Add gtest wrapper for tjbench tests
   - Move tbench logs from stdout to stderr
+  - Write tjunittest output files to sdcard on Android
 
 Refer to working-with-nested-repos [1] for details of how to setup your git
 svn client to update the code (for making local changes, cherry picking from
diff --git a/tjunittest.c b/tjunittest.c
index cd00a21..6235b6f 100644
--- a/tjunittest.c
+++ b/tjunittest.c
@@ -97,6 +97,8 @@ static int doYUV = 0, alloc = 0, pad = 4;
 static int exitStatus = 0;
 #define bailout() { exitStatus = -1;  goto bailout; }
 
+static const size_t filePathSize = 1024;
+
 
 static void initBuf(unsigned char *buf, int w, int h, int pf, int flags)
 {
@@ -349,8 +351,13 @@ bailout:
 static void writeJPEG(unsigned char *jpegBuf, unsigned long jpegSize,
                       char *filename)
 {
+#if defined(ANDROID) && defined(GTEST)
+  char path[filePathSize];
+  snprintf(path, filePathSize, "/sdcard/%s", filename);
+  FILE *file = fopen(path, "wb");
+#else
   FILE *file = fopen(filename, "wb");
-
+#endif
   if (!file || fwrite(jpegBuf, jpegSize, 1, file) != 1) {
     fprintf(stderr, "ERROR: Could not write to %s.\n%s\n", filename,
             strerror(errno));
@@ -366,7 +373,7 @@ static void compTest(tjhandle handle, unsigned char **dstBuf,
                      unsigned long *dstSize, int w, int h, int pf,
                      char *basename, int subsamp, int jpegQual, int flags)
 {
-  char tempStr[1024];
+  char tempStr[filePathSize];
   unsigned char *srcBuf = NULL, *yuvBuf = NULL;
   const char *pfStr = pixFormatStr[pf];
   const char *buStrLong =
@@ -410,7 +417,7 @@ static void compTest(tjhandle handle, unsigned char **dstBuf,
                     jpegQual, flags));
   }
 
-  snprintf(tempStr, 1024, "%s_enc_%s_%s_%s_Q%d.jpg", basename, pfStr, buStr,
+  snprintf(tempStr, filePathSize, "%s_enc_%s_%s_%s_Q%d.jpg", basename, pfStr, buStr,
            subName[subsamp], jpegQual);
   writeJPEG(*dstBuf, *dstSize, tempStr);
   fprintf(stderr, "Done.\n  Result in %s\n", tempStr);
@@ -731,7 +738,8 @@ static int cmpBitmap(unsigned char *buf, int width, int pitch, int height,
 static int doBmpTest(const char *ext, int width, int align, int height, int pf,
                      int flags)
 {
-  char filename[80], *md5sum, md5buf[65];
+  const size_t filenameSize = 80;
+  char filename[filenameSize], *md5sum, md5buf[65];
   int ps = tjPixelSize[pf], pitch = PAD(width * ps, align), loadWidth = 0,
     loadHeight = 0, retval = 0, pixelFormat = pf;
   unsigned char *buf = NULL;
@@ -749,8 +757,13 @@ static int doBmpTest(const char *ext, int width, int align, int height, int pf,
     _throw("Could not allocate memory");
   initBitmap(buf, width, pitch, height, pf, flags);
 
-  snprintf(filename, 80, "test_bmp_%s_%d_%s.%s", pixFormatStr[pf], align,
+#if defined(ANDROID) && defined(GTEST)
+  snprintf(filename, filenameSize, "/sdcard/test_bmp_%s_%d_%s.%s", pixFormatStr[pf],
+           align, (flags & TJFLAG_BOTTOMUP) ? "bu" : "td", ext);
+#else
+  snprintf(filename, filenameSize, "test_bmp_%s_%d_%s.%s", pixFormatStr[pf], align,
            (flags & TJFLAG_BOTTOMUP) ? "bu" : "td", ext);
+#endif
   _tj(tjSaveImage(filename, buf, width, pitch, height, pf, flags));
   md5sum = MD5File(filename, md5buf);
   if (strcasecmp(md5sum, md5ref))