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Decouple only tells audio to change to/from DSD/PCM mode if there is an actual change to be made

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This commit is contained in:
Ross Owen
2014-03-06 21:16:17 +00:00
parent fa8ab2a019
commit 71c876f356
1 changed files with 14 additions and 46 deletions
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60
module_usb_audio/usb_buffer/decouple.xc
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@@ -7,6 +7,7 @@
#ifdef NATIVE_DSD
#include "usbaudio20.h" /* Defines from the USB Audio 2.0 Specifications */
unsigned g_curDsdMode = DSD_MODE_OFF;
#endif
#ifdef HID_CONTROLS
@@ -871,61 +872,30 @@ void decouple(chanend c_mix_out,
}
#ifdef NATIVE_DSD
/* TODO only send when there is a change */
if(dataFormat == UAC_FORMAT_TYPEI_RAW_DATA)
{
dsdMode = DSD_MODE_NATIVE;
}
/* Wait for the audio code to request samples and respond with command */
inuint(c_mix_out);
outct(c_mix_out, SET_DSD_MODE);
outuint(c_mix_out, dsdMode);
/* Wait for handshake back */
chkct(c_mix_out, XS1_CT_END);
#endif
asm("outct res[%0],%1"::"r"(buffer_aud_ctl_chan),"r"(XS1_CT_END));
SET_SHARED_GLOBAL(g_freqChange, 0);
ENABLE_INTERRUPTS();
}
#if 0
//#ifdef NATIVE_DSD
else if(tmp == SET_DSD_MODE)
{
unsigned dsdMode;
DISABLE_INTERRUPTS();
/* Clear the buffer as we dont want to send out old PCM samples.. */
SET_SHARED_GLOBAL(g_freqChange_flag, 0);
GET_SHARED_GLOBAL(dsdMode, g_freqChange_sampFreq); /* Misuse of g_freqChange_sampFreq */
/* Reset OUT buffer state */
SET_SHARED_GLOBAL(g_aud_from_host_rdptr, aud_from_host_fifo_start);
SET_SHARED_GLOBAL(g_aud_from_host_wrptr, aud_from_host_fifo_start);
outUnderflow = 1;
if(outOverflow)
/* To avoid clicks and pops only change mode if we have to */
if(dsdMode != g_curDsdMode)
{
/* If we were previously in overflow we wont have marked as ready */
XUD_SetReady_OutPtr(aud_from_host_usb_ep, aud_from_host_fifo_start+4);
outOverflow = 0;
g_curDsdMode = dsdMode;
/* Wait for the audio code to request samples and respond with command */
inuint(c_mix_out);
outct(c_mix_out, SET_DSD_MODE);
outuint(c_mix_out, dsdMode);
/* Wait for handshake back */
chkct(c_mix_out, XS1_CT_END);
}
inuint(c_mix_out);
outct(c_mix_out, SET_DSD_MODE);
outuint(c_mix_out, dsdMode);
/* Wait for handshake back */
chkct(c_mix_out, XS1_CT_END);
SET_SHARED_GLOBAL(g_freqChange, 0);
#endif
asm("outct res[%0],%1"::"r"(buffer_aud_ctl_chan),"r"(XS1_CT_END));
SET_SHARED_GLOBAL(g_freqChange, 0);
ENABLE_INTERRUPTS();
}
#endif
}
#ifdef OUTPUT
@@ -982,8 +952,6 @@ void decouple(chanend c_mix_out,
/* Enter OUT over flow state */
outOverflow = 1;
#ifdef DEBUG_LEDS
led(c_led);
#endif