1 files changed, 128 insertions, 0 deletions
diff --git a/ti/os_support_custom.h b/ti/os_support_custom.h
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+/* Copyright (C) 2007 Psi Systems, Inc.
+   Author:  Jean-Marc Valin 
+   File: os_support_custom.h
+   Memory Allocation overrides to allow user control rather than C alloc/free.
+
+   Redistribution and use in source and binary forms, with or without
+   modification, are permitted provided that the following conditions
+   are met:
+   
+   - Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.
+   
+   - Redistributions in binary form must reproduce the above copyright
+   notice, this list of conditions and the following disclaimer in the
+   documentation and/or other materials provided with the distribution.
+   
+   - Neither the name of the Xiph.org Foundation nor the names of its
+   contributors may be used to endorse or promote products derived from
+   this software without specific prior written permission.
+   
+   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+   ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+   A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR
+   CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+   EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+   PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+   PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+   LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#ifdef MANUAL_ALLOC
+
+/* To avoid changing the Speex call model, this file relies on four static variables 
+   The user main creates two linear buffers, and initializes spxGlobalHeap/ScratchPtr 
+   to point to the start of the two buffers, and initializes spxGlobalHeap/ScratchEnd 
+   to point to the first address following the last byte of the two buffers.
+   
+   This mechanism allows, for example, data caching for multichannel applications, 
+   where the Speex state is swapped from a large slow memory to a small fast memory 
+   each time the codec runs.
+   
+   Persistent data is allocated in spxGlobalHeap (instead of calloc), while scratch
+   data is allocated in spxGlobalScratch.
+*/
+
+extern char *spxGlobalHeapPtr, *spxGlobalHeapEnd; 
+extern char *spxGlobalScratchPtr, *spxGlobalScratchEnd;
+
+/* Make sure that all structures are aligned to largest type */
+#define BLOCK_MASK      (sizeof(long double)-1)
+extern inline void speex_warning(const char *str);
+
+#define OVERRIDE_SPEEX_ALLOC
+static inline void *speex_alloc (int size)
+{
+    void *ptr;
+    
+    ptr = (void *) (((int)spxGlobalHeapPtr + BLOCK_MASK) & ~BLOCK_MASK);  //Start on 8 boundary
+
+    spxGlobalHeapPtr = (char *)((int)ptr + size);	// Update pointer to next free location
+
+    if (spxGlobalHeapPtr > spxGlobalHeapEnd ) 
+    {
+#ifdef VERBOSE_ALLOC
+	    fprintf (stderr, "insufficient space for persistent alloc request %d bytes\n", size);
+#endif
+       return 0;
+    }
+   
+#ifdef VERBOSE_ALLOC
+    fprintf (stderr, "Persist Allocated %d chars at %x, %d remaining\n", size, ptr, ((int)spxGlobalHeapEnd - (int)spxGlobalHeapPtr));
+#endif
+    memset(ptr, 0, size);
+    return ptr;
+}
+
+#define OVERRIDE_SPEEX_ALLOC_SCRATCH
+static inline void *speex_alloc_scratch (int size)
+{
+    void *ptr;
+
+    ptr = (void *) (((int)spxGlobalScratchPtr + BLOCK_MASK) & ~BLOCK_MASK);  //Start on 8 boundary
+
+    spxGlobalScratchPtr = (char *)((int)ptr + size);	// Update pointer to next free location
+
+    if (spxGlobalScratchPtr > spxGlobalScratchEnd ) 
+    {
+#ifdef VERBOSE_ALLOC
+	    fprintf (stderr, "insufficient space for scratch alloc request %d bytes\n", size);
+#endif
+       return 0;
+    }
+   
+#ifdef VERBOSE_ALLOC
+    fprintf (stderr, "Scratch Allocated %d chars at %x, %d remaining\n", size, ptr, ((int)spxGlobalScratchEnd - (int)spxGlobalScratchPtr));
+#endif
+    memset(ptr, 0, size);
+    return ptr;
+}
+
+#define OVERRIDE_SPEEX_REALLOC
+static inline void *speex_realloc (void *ptr, int size)
+{
+#ifdef VERBOSE_ALLOC
+   speex_warning("realloc attempted, not allowed");
+#endif
+   return 0;
+}
+
+#define OVERRIDE_SPEEX_FREE
+static inline void speex_free (void *ptr)
+{
+#ifdef VERBOSE_ALLOC
+   speex_warning("at speex_free");
+#endif
+}
+#define OVERRIDE_SPEEX_FREE_SCRATCH
+static inline void speex_free_scratch (void *ptr)
+{
+#ifdef VERBOSE_ALLOC
+   speex_warning("at speex_free_scratch");
+#endif
+}
+
+#endif    /* !MANUAL_ALLOC */