Vergil_Wong/lib_xua
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Decouple optimisation for when output slot size = 4 (note, trades off code size)

Browse Source
This commit is contained in:
Ross Owen
2023-03-13 14:33:22 +00:00
parent 57593bfea3
commit b17f585004
1 changed files with 64 additions and 28 deletions
Download Patch File Download Diff File Expand all files Collapse all files

92
lib_xua/src/core/buffer/decouple/decouple.xc
View File

@@ -67,6 +67,7 @@ unsigned int multIn[NUM_USB_CHAN_IN + 1];
static xc_ptr p_multIn;
#endif
/* Default to something sensible but the following are setup at stream start (unless UAC1 only..) */
#if (AUDIO_CLASS == 2)
int g_numUsbChan_In = NUM_USB_CHAN_IN; /* Number of channels to/from the USB bus - initialised to HS for UAC2.0 */
int g_numUsbChan_Out = NUM_USB_CHAN_OUT;
@@ -143,7 +144,66 @@ unsigned unpackData = 0;
unsigned packState = 0;
unsigned packData = 0;
/* Default to something sensible but the following are setup at stream start (unless UAC1 only..) */
static inline void SendSamples4(chanend c_mix_out)
{
/* Doing this checking allows us to unroll */
if(g_numUsbChan_Out == NUM_USB_CHAN_OUT)
{
/* Buffering not underflow condition send out some samples...*/
#pragma loop unroll
for(int i = 0; i < NUM_USB_CHAN_OUT; i++)
{
int sample;
int mult;
int h;
unsigned l;
read_via_xc_ptr(sample, g_aud_from_host_rdptr);
g_aud_from_host_rdptr+=4;
#if (OUTPUT_VOLUME_CONTROL == 1) && (!OUT_VOLUME_IN_MIXER)
asm volatile("ldw %0, %1[%2]":"=r"(mult):"r"(p_multOut),"r"(i));
{h, l} = macs(mult, sample, 0, 0);
h <<= 3;
#if (STREAM_FORMAT_OUTPUT_RESOLUTION_32BIT_USED == 1)
h |= (l >>29) & 0x7; // Note: This step is not required if we assume sample depth is 24bit (rather than 32bit)
// Note: We need all 32bits for Native DSD
#endif
outuint(c_mix_out, h);
#else
outuint(c_mix_out, sample);
#endif
}
}
else
{
#pragma loop unroll
for(int i = 0; i < NUM_USB_CHAN_OUT_FS; i++)
{
int sample;
int mult;
int h;
unsigned l;
read_via_xc_ptr(sample, g_aud_from_host_rdptr);
g_aud_from_host_rdptr+=4;
#if (OUTPUT_VOLUME_CONTROL == 1) && (!OUT_VOLUME_IN_MIXER)
asm volatile("ldw %0, %1[%2]":"=r"(mult):"r"(p_multOut),"r"(i));
{h, l} = macs(mult, sample, 0, 0);
h <<= 3;
#if (STREAM_FORMAT_OUTPUT_RESOLUTION_32BIT_USED == 1)
h |= (l >>29) & 0x7; // Note: This step is not required if we assume sample depth is 24bit (rather than 32bit)
// Note: We need all 32bits for Native DSD
#endif
outuint(c_mix_out, h);
#else
outuint(c_mix_out, sample);
#endif
}
}
}
#pragma select handler
#pragma unsafe arrays
@@ -223,41 +283,17 @@ __builtin_unreachable();
__builtin_unreachable();
#endif
/* Buffering not underflow condition send out some samples...*/
for(int i = 0; i < g_numUsbChan_Out; i++)
{
#pragma xta endpoint "mixer_request"
int sample;
int mult;
int h;
unsigned l;
read_via_xc_ptr(sample, g_aud_from_host_rdptr);
g_aud_from_host_rdptr+=4;
#if (OUTPUT_VOLUME_CONTROL == 1) && (!OUT_VOLUME_IN_MIXER)
asm volatile("ldw %0, %1[%2]":"=r"(mult):"r"(p_multOut),"r"(i));
{h, l} = macs(mult, sample, 0, 0);
h <<= 3;
#if (STREAM_FORMAT_OUTPUT_RESOLUTION_32BIT_USED == 1)
h |= (l >>29)& 0x7; // Note: This step is not required if we assume sample depth is 24bit (rather than 32bit)
// Note: We need all 32bits for Native DSD
#endif
outuint(c_mix_out, h);
#else
outuint(c_mix_out, sample);
#endif
}
SendSamples4(c_mix_out);
break;
case 3:
#if (STREAM_FORMAT_OUTPUT_SUBSLOT_3_USED == 0)
__builtin_unreachable();
#endif
/* Buffering not underflow condition send out some samples...*/
/* Note, in this case the unpacking of data is more of an overhead than the loop overhead
* so we do not currently make attempts to unroll */
for(int i = 0; i < g_numUsbChan_Out; i++)
{
#pragma xta endpoint "mixer_request"
int sample;
int mult;
int h;