libretro, add Pico pad overlay and storyware pages handling

platform/libretro/libretro-common/include/streams/trans_stream.h

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+/* Copyright  (C) 2010-2020 The RetroArch team
+ *
+ * ---------------------------------------------------------------------------------------
+ * The following license statement only applies to this file (trans_stream.h).
+ * ---------------------------------------------------------------------------------------
+ *
+ * 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.
+ */
+
+#ifndef LIBRETRO_SDK_TRANS_STREAM_H__
+#define LIBRETRO_SDK_TRANS_STREAM_H__
+
+#include <stdint.h>
+#include <stddef.h>
+#include <boolean.h>
+
+#ifdef _WIN32
+#include <direct.h>
+#else
+#include <unistd.h>
+#endif
+
+#include <retro_miscellaneous.h>
+
+#include <retro_common_api.h>
+
+RETRO_BEGIN_DECLS
+
+enum trans_stream_error
+{
+    TRANS_STREAM_ERROR_NONE = 0,
+    TRANS_STREAM_ERROR_AGAIN, /* more work to do */
+    TRANS_STREAM_ERROR_ALLOCATION_FAILURE, /* malloc failure */
+    TRANS_STREAM_ERROR_INVALID, /* invalid state */
+    TRANS_STREAM_ERROR_BUFFER_FULL, /* output buffer full */
+    TRANS_STREAM_ERROR_OTHER
+};
+
+struct trans_stream_backend
+{
+   const char *ident;
+   const struct trans_stream_backend *reverse;
+
+   /* Create a stream data structure */
+   void *(*stream_new)(void);
+
+   /* Free it */
+   void  (*stream_free)(void *);
+
+   /* (Optional) Set extra properties, defined per transcoder */
+   bool  (*define)(void *, const char *, uint32_t);
+
+   /* Set our input source */
+   void  (*set_in)(void *, const uint8_t *, uint32_t);
+
+   /* Set our output target */
+   void  (*set_out)(void *, uint8_t *, uint32_t);
+
+   /* Perform a transcoding, flushing/finalizing if asked to. Writes out how
+    * many bytes were read and written. Error target optional. */
+   bool  (*trans)(void *, bool, uint32_t *, uint32_t *, enum trans_stream_error *);
+};
+
+/**
+ * trans_stream_trans_full:
+ * @backend                     : transcoding backend
+ * @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);
+
+const struct trans_stream_backend* trans_stream_get_zlib_deflate_backend(void);
+const struct trans_stream_backend* trans_stream_get_zlib_inflate_backend(void);
+const struct trans_stream_backend* trans_stream_get_pipe_backend(void);
+
+extern const struct trans_stream_backend zlib_deflate_backend;
+extern const struct trans_stream_backend zlib_inflate_backend;
+extern const struct trans_stream_backend pipe_backend;
+
+RETRO_END_DECLS
+
+#endif