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backport r26663 : fix microphone recording on as3525v1

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git-svn-id: svn://svn.rockbox.org/rockbox/branches/v3_6@26665 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Rafaël Carré 2010-06-07 17:03:15 +00:00
parent 01fdf827f2
commit 164b7c9543
1 changed files with 17 additions and 7 deletions
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24
firmware/target/arm/as3525/pcm-as3525.c
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@ -257,10 +257,10 @@ static void rec_dma_start(void)
}
#if CONFIG_CPU == AS3525
/* if needed, duplicate samples of the working channel until the given bound */
static inline void mono2stereo(int16_t *end)
{
#if CONFIG_CPU == AS3525
if(audio_channels != 1) /* only for microphone */
return;
#if 0
@ -286,11 +286,8 @@ static inline void mono2stereo(int16_t *end)
: "memory"
);
#endif /* C / ASM */
#else
/* microphone recording is stereo on as3525v2 */
(void)end;
#endif
}
#endif /* CONFIG_CPU == AS3525 */
static void rec_dma_callback(void)
{
@ -303,8 +300,10 @@ static void rec_dma_callback(void)
* pcm_rec_unlock() */
rec_dma_transfer_size = 0;
#if CONFIG_CPU == AS3525
/* the 2nd channel is silent when recording microphone on as3525v1 */
mono2stereo(AS3525_UNCACHED_ADDR((int16_t*)rec_dma_start_addr));
#endif
if(locked)
{
@ -389,12 +388,23 @@ void pcm_rec_dma_init(void)
const void * pcm_rec_dma_get_peak_buffer(void)
{
pcm_rec_lock();
#if CONFIG_CPU == AS3525
/*
* We need to prevent the DMA callback from kicking in while we are
* faking the right channel with data from left channel.
*/
int old = disable_irq_save();
int16_t *addr = AS3525_UNCACHED_ADDR((int16_t *)DMAC_CH_DST_ADDR(1));
mono2stereo(addr);
pcm_rec_unlock();
restore_irq(old);
return addr;
#else
/* Microphone recording is stereo on as3525v2 */
return AS3525_UNCACHED_ADDR((int16_t *)DMAC_CH_DST_ADDR(1));
#endif
}
#endif /* HAVE_RECORDING */