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Added SetupZerosSendBuffer func since code duplicated. This function is now also called on SET_CHANNEL_COUNT_IN

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This commit is contained in:
Ross Owen
2014-02-19 17:48:53 +00:00
parent bfe829f227
commit 3e5ac4ffdd
1 changed files with 41 additions and 22 deletions
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63
module_usb_audio/usb_buffer/decouple.xc
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@@ -620,6 +620,31 @@ static void check_for_interrupt(chanend ?c_clk_int) {
}
}
/* Mark Endpoint (IN) ready with an appropriately sized zero buffer */
static inline void SetupZerosSendBuffer(XUD_ep aud_to_host_usb_ep, unsigned sampFreq)
{
int min, mid, max, usb_speed, p;
GET_SHARED_GLOBAL(usb_speed, g_curUsbSpeed);
GetADCCounts(sampFreq, min, mid, max);
if (usb_speed == XUD_SPEED_HS)
{
mid*=NUM_USB_CHAN_IN*SAMPLE_SUBSLOT_SIZE_HS;
}
else
{
mid*=NUM_USB_CHAN_IN_FS*SAMPLE_SUBSLOT_SIZE_FS;
}
asm("stw %0, %1[0]"::"r"(mid),"r"(g_aud_to_host_zeros));
/* Mark EP ready with the zero buffer. Note this will simply update the packet size
* if it is already ready */
GET_SHARED_GLOBAL(p, g_aud_to_host_buffer);
XUD_SetReady_InPtr(aud_to_host_usb_ep, p+4, mid);
}
unsigned char tmpBuffer[1026];
#pragma unsafe arrays
@@ -660,6 +685,10 @@ void decouple(chanend c_mix_out,
g_aud_to_host_wrptr = aud_to_host_fifo_start;
g_aud_to_host_rdptr = aud_to_host_fifo_start;
/* Setup pointer to In stream 0 buffer. Note, length will be innited to 0
* However, this should be over-written on first stream start (assuming host
properly sends a SetInterface() before streaming. In any case we will send
0 length packets, which is reasonable behaviour */
t = array_to_xc_ptr(inZeroBuff);
g_aud_to_host_zeros = t;
@@ -721,6 +750,10 @@ void decouple(chanend c_mix_out,
aud_to_host_flag = 0;
SET_SHARED_GLOBAL(g_aud_to_host_flag, aud_to_host_flag);
/* NOTE: IN EP not marked ready at this point - Intial size of zero buffer not set
* The host will send a SetAltInterface before streaming which will lead to this core
* getting a SET_CHANNEL_COUNT_IN. This will setup the EP for the first packet */
#if 0
// send the current host -> device buffer out of the fifo
SET_SHARED_GLOBAL(g_aud_to_host_buffer, g_aud_to_host_zeros);
{
@@ -731,6 +764,7 @@ void decouple(chanend c_mix_out,
read_via_xc_ptr(len, p)
XUD_SetReady_InPtr(aud_to_host_usb_ep, g_aud_to_host_buffer, len);
}
#endif
#endif
while(1)
@@ -769,10 +803,8 @@ void decouple(chanend c_mix_out,
inOverflow = 0;
inUnderflow = 1;
SET_SHARED_GLOBAL(g_aud_to_host_rdptr,
aud_to_host_fifo_start);
SET_SHARED_GLOBAL(g_aud_to_host_wrptr,
aud_to_host_fifo_start);
SET_SHARED_GLOBAL(g_aud_to_host_rdptr, aud_to_host_fifo_start);
SET_SHARED_GLOBAL(g_aud_to_host_wrptr, aud_to_host_fifo_start);
SET_SHARED_GLOBAL(sampsToWrite, 0);
SET_SHARED_GLOBAL(totalSampsToWrite, 0);
@@ -780,22 +812,7 @@ void decouple(chanend c_mix_out,
SET_SHARED_GLOBAL(g_aud_to_host_buffer,g_aud_to_host_zeros);
/* Update size of zeros buffer */
{
int min, mid, max, usb_speed, p;
GET_SHARED_GLOBAL(usb_speed, g_curUsbSpeed);
GetADCCounts(sampFreq, min, mid, max);
if (usb_speed == XUD_SPEED_HS)
mid*=NUM_USB_CHAN_IN*SAMPLE_SUBSLOT_SIZE_HS;
else
mid*=NUM_USB_CHAN_IN_FS*SAMPLE_SUBSLOT_SIZE_FS;
asm("stw %0, %1[0]"::"r"(mid),"r"(g_aud_to_host_zeros));
/* Mark EP ready with the zero buffer. Note this will simply update the packet size
* if it is already ready */
GET_SHARED_GLOBAL(p, g_aud_to_host_buffer);
XUD_SetReady_InPtr(aud_to_host_usb_ep, p+4, mid);
}
SetupZerosSendBuffer(aud_to_host_usb_ep, sampFreq);
/* Reset OUT buffer state */
outUnderflow = 1;
@@ -835,9 +852,12 @@ void decouple(chanend c_mix_out,
SET_SHARED_GLOBAL(g_aud_to_host_wrptr,aud_to_host_fifo_start);
SET_SHARED_GLOBAL(sampsToWrite, 0);
SET_SHARED_GLOBAL(totalSampsToWrite, 0);
/* Set buffer back to zeros buffer */
SET_SHARED_GLOBAL(g_aud_to_host_buffer, g_aud_to_host_zeros);
// TODO Set size of zero buffer here
/* Update size of zeros buffer */
SetupZerosSendBuffer(aud_to_host_usb_ep, sampFreq);
SET_SHARED_GLOBAL(g_freqChange, 0);
ENABLE_INTERRUPTS();
@@ -1050,7 +1070,6 @@ void decouple(chanend c_mix_out,
{
inUnderflow = 1;
SET_SHARED_GLOBAL(g_aud_to_host_buffer, g_aud_to_host_zeros);
}
}