libretro, add Pico pad overlay and storyware pages handling

platform/libretro/libretro-common/streams/trans_stream.c

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+/* Copyright  (C) 2010-2020 The RetroArch team
+ *
+ * ---------------------------------------------------------------------------------------
+ * The following license statement only applies to this file (trans_stream.c).
+ * ---------------------------------------------------------------------------------------
+ *
+ * Permission is hereby granted, free of charge,
+ * to any person obtaining a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <streams/trans_stream.h>
+
+/**
+ * trans_stream_trans_full:
+ * @data                        : (optional) existing stream data, or a target
+ *                                for the new stream data to be saved
+ * @in                          : input data
+ * @in_size                     : input size
+ * @out                         : output data
+ * @out_size                    : output size
+ * @error                       : (optional) output for error code
+ *
+ * Perform a full transcoding from a source to a destination.
+ */
+bool trans_stream_trans_full(
+    struct trans_stream_backend *backend, void **data,
+    const uint8_t *in, uint32_t in_size,
+    uint8_t *out, uint32_t out_size,
+    enum trans_stream_error *error)
+{
+   void *rdata;
+   bool ret;
+   uint32_t rd, wn;
+
+   if (data && *data)
+      rdata = *data;
+   else
+   {
+      if (!(rdata = backend->stream_new()))
+      {
+         if (error)
+            *error = TRANS_STREAM_ERROR_ALLOCATION_FAILURE;
+         return false;
+      }
+   }
+
+   backend->set_in(rdata, in, in_size);
+   backend->set_out(rdata, out, out_size);
+   ret = backend->trans(rdata, true, &rd, &wn, error);
+
+   if (data)
+      *data = rdata;
+   else
+      backend->stream_free(rdata);
+
+   return ret;
+}
+
+const struct trans_stream_backend* trans_stream_get_zlib_deflate_backend(void)
+{
+#if HAVE_ZLIB
+   return &zlib_deflate_backend;
+#else
+   return NULL;
+#endif
+}
+
+const struct trans_stream_backend* trans_stream_get_zlib_inflate_backend(void)
+{
+#if HAVE_ZLIB
+   return &zlib_inflate_backend;
+#else
+   return NULL;
+#endif
+}
+
+const struct trans_stream_backend* trans_stream_get_pipe_backend(void)
+{
+   return &pipe_backend;
+}