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Decouple can now handle different channel counts for UAC1/UAC2

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This commit is contained in:
Ross Owen
2013-02-07 17:18:17 +00:00
parent 2352735a01
commit 420bbe8120
1 changed files with 48 additions and 12 deletions
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60
module_usb_audio/usb_buffer/decouple.xc
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@@ -35,16 +35,16 @@
#endif
#define MAX(x,y) ((x)>(y) ? (x) : (y))
#define MAX_CLASS_ONE_FREQ 96000
#define MAX_CLASS_ONE_CHAN 2
#define CLASS_TWO_PACKET_SIZE ((((MAX_FREQ+7999)/8000))+3)
#define CLASS_ONE_PACKET_SIZE ((((MAX_CLASS_ONE_FREQ+999)/1000))+3)
#define CLASS_ONE_PACKET_SIZE ((((MAX_FREQ_A1+999)/1000))+3)
#define BUFF_SIZE_OUT MAX(4 * CLASS_TWO_PACKET_SIZE * NUM_USB_CHAN_OUT, 4 * CLASS_ONE_PACKET_SIZE * NUM_USB_CHAN_OUT_A1)
#define BUFF_SIZE_IN MAX(4 * CLASS_TWO_PACKET_SIZE * NUM_USB_CHAN_IN, 4 * CLASS_ONE_PACKET_SIZE * NUM_USB_CHAN_IN_A1)
#define BUFF_SIZE_OUT MAX(4 * CLASS_TWO_PACKET_SIZE * NUM_USB_CHAN_OUT, 4 * CLASS_ONE_PACKET_SIZE * MAX_CLASS_ONE_CHAN)
#define BUFF_SIZE_IN MAX(4 * CLASS_TWO_PACKET_SIZE * NUM_USB_CHAN_IN, 4 * CLASS_ONE_PACKET_SIZE * MAX_CLASS_ONE_CHAN)
#define MAX_USB_AUD_PACKET_SIZE 1028
#define OUT_BUFFER_PREFILL (MAX(MAX_CLASS_ONE_CHAN*CLASS_ONE_PACKET_SIZE*3+4,NUM_USB_CHAN_OUT*CLASS_TWO_PACKET_SIZE*4+4)*1)
#define OUT_BUFFER_PREFILL (MAX(NUM_USB_CHAN_OUT_A1*CLASS_ONE_PACKET_SIZE*3+4,NUM_USB_CHAN_OUT*CLASS_TWO_PACKET_SIZE*4+4)*1)
#define IN_BUFFER_PREFILL (MAX(CLASS_ONE_PACKET_SIZE*3+4,CLASS_TWO_PACKET_SIZE*4+4)*2)
/* Volume and mute tables */
@@ -57,12 +57,12 @@ unsigned int multIn[NUM_USB_CHAN_IN + 1];
static xc_ptr p_multIn;
#endif
/* Number of channels to/from the USB bus */
/* Number of channels to/from the USB bus - initialised to HS Audio 2.0 */
unsigned g_numUsbChanOut = NUM_USB_CHAN_OUT;
unsigned g_numUsbChanIn = NUM_USB_CHAN_IN;
#define MAX_DEVICE_AUD_PACKET_SIZE_CLASS_TWO ((MAX_FREQ/8000+1)*NUM_USB_CHAN_IN*4)
#define MAX_DEVICE_AUD_PACKET_SIZE_CLASS_ONE (((MAX_CLASS_ONE_FREQ/1000+1)*MAX_CLASS_ONE_CHAN*3)+4)
#define MAX_DEVICE_AUD_PACKET_SIZE_CLASS_ONE (((MAX_FREQ_A1/1000+1)*NUM_USB_CHAN_IN_A1*3)+4)
#define MAX_DEVICE_AUD_PACKET_SIZE (MAX(MAX_DEVICE_AUD_PACKET_SIZE_CLASS_ONE, MAX_DEVICE_AUD_PACKET_SIZE_CLASS_TWO))
@@ -414,7 +414,7 @@ void handle_audio_request(chanend c_mix_out)
}
else
{
unsigned int datasize = totalSampsToWrite*3*g_numUsbChanIn;
unsigned int datasize = totalSampsToWrite*3*NUM_USB_CHAN_IN_A1;
datasize = (datasize+3) & (~0x3); // round up to nearest word
g_aud_to_host_wrptr += 4+datasize;
}
@@ -441,7 +441,7 @@ void handle_audio_request(chanend c_mix_out)
}
else
{
if (totalSampsToWrite < 0 || totalSampsToWrite*3*g_numUsbChanIn > (MAX_DEVICE_AUD_PACKET_SIZE_CLASS_ONE))
if (totalSampsToWrite < 0 || totalSampsToWrite*3*NUM_USB_CHAN_IN_A1 > (MAX_DEVICE_AUD_PACKET_SIZE_CLASS_ONE))
{
totalSampsToWrite = 0;
}
@@ -701,6 +701,21 @@ void decouple(chanend c_mix_out,
}
#endif
{
int usb_speed = 0;
while(usb_speed == 0)
{
GET_SHARED_GLOBAL(usb_speed, g_curUsbSpeed);
}
if(usb_speed == XUD_SPEED_FS)
{
g_numUsbChanOut = NUM_USB_CHAN_OUT_A1;
g_numUsbChanIn = NUM_USB_CHAN_IN_A1;
}
}
while(1)
{
int tmp;
@@ -756,7 +771,7 @@ void decouple(chanend c_mix_out,
if (usb_speed == XUD_SPEED_HS)
mid*=NUM_USB_CHAN_IN*4;
else
mid*=NUM_USB_CHAN_IN*3;
mid*=NUM_USB_CHAN_IN_A1*3;
asm("stw %0, %1[0]"::"r"(mid),"r"(g_aud_to_host_zeros));
}
@@ -816,6 +831,28 @@ void decouple(chanend c_mix_out,
SET_SHARED_GLOBAL(totalSampsToWrite, 0);
SET_SHARED_GLOBAL(g_aud_to_host_buffer, g_aud_to_host_zeros);
SET_SHARED_GLOBAL(g_freqChange, 0);
ENABLE_INTERRUPTS();
}
else if(tmp == SET_CHAN_COUNT_OUT)
{
/* Change in OUT channel count */
DISABLE_INTERRUPTS();
SET_SHARED_GLOBAL(g_freqChange_flag, 0);
GET_SHARED_GLOBAL(g_numUsbChanOut, 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)
{
/* 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;
}
SET_SHARED_GLOBAL(g_freqChange, 0);
ENABLE_INTERRUPTS();
}
@@ -864,7 +901,6 @@ void decouple(chanend c_mix_out,
{
space_left = aud_from_host_fifo_end - g_aud_from_host_wrptr;
}
if (space_left <= 0 || space_left >= MAX_USB_AUD_PACKET_SIZE)
{