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rbcodec: Hooks for target specific functions in dsp_process loop

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Use them to move tick counting, yielding and coldfire macsr handling
code to a rockbox specific file.

Change-Id: Id7417dc98c08a342eba45ba56b044a276e50564b
Reviewed-on: http://gerrit.rockbox.org/229
Tested-by: Nils Wallménius <nils@rockbox.org>
Reviewed-by: Nils Wallménius <nils@rockbox.org>
This commit is contained in:
Michael Sevakis 2012-05-03 15:54:48 +02:00 • committed by Nils Wallménius
parent 00cf2ce711
commit dbe5e5f2df
3 changed files with 74 additions and 47 deletions
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52
apps/rbcodecconfig.h
View file

@ -17,6 +17,58 @@
* {,U}INT{8,16,32,64}_{MIN,MAX} */
#include "system.h"
/* Structure to record some info during processing call */
struct dsp_loop_context
{
long last_yield;
#ifdef CPU_COLDFIRE
unsigned long old_macsr;
#endif
};
static inline void dsp_process_start(struct dsp_loop_context *ctx)
{
/* At least perform one yield before starting */
ctx->last_yield = current_tick;
yield();
#if defined(CPU_COLDFIRE)
/* set emac unit for dsp processing, and save old macsr, we're running in
codec thread context at this point, so can't clobber it */
ctx->old_macsr = coldfire_get_macsr();
coldfire_set_macsr(EMAC_FRACTIONAL | EMAC_SATURATE);
#endif
}
static inline void dsp_process_loop(struct dsp_loop_context *ctx)
{
/* Yield at least once each tick */
long tick = current_tick;
if (TIME_AFTER(tick, ctx->last_yield))
{
ctx->last_yield = tick;
yield();
}
}
static inline void dsp_process_end(struct dsp_loop_context *ctx)
{
#if defined(CPU_COLDFIRE)
/* set old macsr again */
coldfire_set_macsr(ctx->old_macsr);
#endif
(void)ctx;
}
#define DSP_PROCESS_START() \
struct dsp_loop_context __ctx; \
dsp_process_start(&__ctx)
#define DSP_PROCESS_LOOP() \
dsp_process_loop(&__ctx)
#define DSP_PROCESS_END() \
dsp_process_end(&__ctx)
#endif
#endif