| /* 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 */
|