forked from PAWPAW-Mirror/lib_xua
292 lines
10 KiB
Plaintext
292 lines
10 KiB
Plaintext
#include <xs1.h>
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#include "xua_commands.h"
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#include "xud.h"
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#include "testct_byref.h"
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#define DEBUG_UNIT XUA_LITE_BUFFER
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#define DEBUG_PRINT_ENABLE_XUA_LITE_BUFFER 1
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#include "debug_print.h"
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#include "xua.h"
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//#include "fifo_impl.h" //xua_conf.h must be included before hand so that we have FIFO sizes
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//Currently only single frequency supported
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#define NOMINAL_SR_DEVICE DEFAULT_FREQ
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#define NOMINAL_SR_HOST DEFAULT_FREQ
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#define DIV_ROUND_UP(n, d) (n / d + 1) //Always rounds up to the next integer. Needed for 48001Hz case etc.
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#define BIGGEST(a, b) (a > b ? a : b)
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#define SOF_FREQ_HZ (8000 - ((2 - AUDIO_CLASS) * 7000) )
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//Defines for endpoint buffer sizes. Samples is total number of samples across all channels
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#define MAX_OUT_SAMPLES_PER_SOF_PERIOD (DIV_ROUND_UP(MAX_FREQ, SOF_FREQ_HZ) * NUM_USB_CHAN_OUT)
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#define MAX_IN_SAMPLES_PER_SOF_PERIOD (DIV_ROUND_UP(MAX_FREQ, SOF_FREQ_HZ) * NUM_USB_CHAN_IN)
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#define MAX_OUTPUT_SLOT_SIZE 4
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#define MAX_INPUT_SLOT_SIZE 4
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#define OUT_AUDIO_BUFFER_SIZE_BYTES (MAX_OUT_SAMPLES_PER_SOF_PERIOD * MAX_OUTPUT_SLOT_SIZE)
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#define IN_AUDIO_BUFFER_SIZE_BYTES (MAX_IN_SAMPLES_PER_SOF_PERIOD * MAX_INPUT_SLOT_SIZE)
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//Helper to disassemble USB packets into 32b left aligned audio samples
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static inline void unpack_buff_to_samples(unsigned char input[], const unsigned n_samples, const unsigned slot_size, int output[]){
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switch(slot_size){
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case 4:
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for (int i = 0; i < n_samples; i++){
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unsigned base = i * 4;
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output[i] = (input[base + 3] << 24) | (input[base + 2] << 16) | (input[base + 1] << 8) | input[base + 0];
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}
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break;
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case 3:
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for (int i = 0; i < n_samples; i++){
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unsigned base = i * 3;
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output[i] = (input[base + 2] << 24) | (input[base + 1] << 16) | (input[base + 0] << 8);
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}
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break;
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case 2:
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for (int i = 0; i < n_samples; i++){
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unsigned base = i * 2;
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output[i] = (input[base + 1] << 24) | (input[base + 0] << 16);
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}
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break;
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default:
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debug_printf("Invalid slot_size\n");
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break;
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}
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}
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//Helper to assemble USB packets from 32b left aligned audio samples
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static inline void pack_samples_to_buff(int input[], const unsigned n_samples, const unsigned slot_size, unsigned char output[]){
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switch(slot_size){
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case 4:
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for (int i = 0; i < n_samples; i++){
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unsigned base = i * 4;
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unsigned in_word = (unsigned)input[i];
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output[base + 0] = in_word & 0xff;
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output[base + 1] = (in_word & 0xff00) >> 8;
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output[base + 2] = (in_word & 0xff0000) >> 16;
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output[base + 3] = (in_word) >> 24;
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}
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break;
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case 3:
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for (int i = 0; i < n_samples; i++){
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unsigned base = i * 3;
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unsigned in_word = (unsigned)input[i];
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output[base + 0] = (in_word & 0xff00) >> 8;
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output[base + 1] = (in_word & 0xff0000) >> 16;
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output[base + 2] = (in_word) >> 24;
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}
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break;
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case 2:
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for (int i = 0; i < n_samples; i++){
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unsigned base = i * 2;
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unsigned in_word = (unsigned)input[i];
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output[base + 0] = (in_word & 0xff0000) >> 16;
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output[base + 1] = (in_word) >> 24;
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}
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break;
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default:
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debug_printf("Invalid slot_size\n");
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break;
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}
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}
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void XUA_Buffer_lite(chanend c_aud_out, chanend c_feedback, chanend c_aud_in, chanend c_sof, chanend c_aud_ctl, in port p_for_mclk_count, chanend c_audio_hub){
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debug_printf("%d\n", MAX_OUT_SAMPLES_PER_SOF_PERIOD);
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unsigned sampleFreq = DEFAULT_FREQ;
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unsigned char buffer_aud_out[OUT_AUDIO_BUFFER_SIZE_BYTES];
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unsigned char buffer_aud_in[IN_AUDIO_BUFFER_SIZE_BYTES];
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#define FEEDBACK_BUFF_SIZE 4
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unsigned char buffer_feedback[FEEDBACK_BUFF_SIZE];
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unsigned int fb_clocks[1] = {0};
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unsigned in_subslot_size = (AUDIO_CLASS == 1) ? FS_STREAM_FORMAT_INPUT_1_SUBSLOT_BYTES : HS_STREAM_FORMAT_INPUT_1_SUBSLOT_BYTES;
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unsigned out_subslot_size = (AUDIO_CLASS == 1) ? FS_STREAM_FORMAT_OUTPUT_1_SUBSLOT_BYTES : HS_STREAM_FORMAT_OUTPUT_1_SUBSLOT_BYTES;
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unsigned in_num_chan = NUM_USB_CHAN_IN;
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unsigned out_num_chan = NUM_USB_CHAN_OUT;
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unsigned tmp;
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unsigned lastClock = 0;
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unsigned clocks = 0;
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long long clockcounter = 0;
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unsigned sof_count=0;
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unsigned mod_from_last_time = 0;
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XUD_ep ep_aud_out = XUD_InitEp(c_aud_out);
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XUD_ep ep_feedback = XUD_InitEp(c_feedback);
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XUD_ep ep_aud_in = XUD_InitEp(c_aud_in);
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unsigned num_samples_received_from_host = 0;
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unsigned outstanding_samples_to_host = 0;
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unsigned num_samples_to_send_to_host = 0;
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XUD_SetReady_OutPtr(ep_aud_out, (unsigned)buffer_aud_out);
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XUD_SetReady_InPtr(ep_aud_in, (unsigned)buffer_aud_in, num_samples_to_send_to_host);
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XUD_SetReady_InPtr(ep_feedback, (unsigned)buffer_feedback, FEEDBACK_BUFF_SIZE);
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// printintln(OUT_AUDIO_BUFFER_SIZE_BYTES);
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// printintln(MAX_OUT_SAMPLES_PER_SOF_PERIOD);
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int loopback_samples[MAX_OUT_SAMPLES_PER_SOF_PERIOD] = {0};
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while(1){
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XUD_Result_t result;
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unsigned length = 0;
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select{
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//Handle control path from EP0
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case testct_byref(c_aud_ctl, tmp):
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//ignore tmp as is used for reboot signalling only
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unsigned cmd = inuint(c_aud_ctl);
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debug_printf("c_aud_ctl cmd: %d\n", cmd);
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if(cmd == SET_SAMPLE_FREQ){
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unsigned receivedSampleFreq = inuint(c_aud_ctl);
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debug_printf("SET_SAMPLE_FREQ: %d\n", receivedSampleFreq);
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sampleFreq = receivedSampleFreq;
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}
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else if(cmd == SET_STREAM_FORMAT_IN){
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unsigned formatChange_DataFormat = inuint(c_aud_ctl);
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unsigned formatChange_NumChans = inuint(c_aud_ctl);
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unsigned formatChange_SubSlot = inuint(c_aud_ctl);
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unsigned formatChange_SampRes = inuint(c_aud_ctl);
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debug_printf("SET_STREAM_FORMAT_IN: %d %d %d %d\n", formatChange_DataFormat, formatChange_NumChans, formatChange_SubSlot, formatChange_SampRes);
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in_subslot_size = formatChange_SubSlot;
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in_num_chan = formatChange_NumChans;
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}
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else if (cmd == SET_STREAM_FORMAT_OUT)
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{
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XUD_BusSpeed_t busSpeed;
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unsigned formatChange_DataFormat = inuint(c_aud_ctl);
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unsigned formatChange_NumChans = inuint(c_aud_ctl);
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unsigned formatChange_SubSlot = inuint(c_aud_ctl);
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unsigned formatChange_SampRes = inuint(c_aud_ctl);
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debug_printf("SET_STREAM_FORMAT_OUT: %d %d %d %d\n", formatChange_DataFormat, formatChange_NumChans, formatChange_SubSlot, formatChange_SampRes);
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out_subslot_size = formatChange_SubSlot;
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out_num_chan = formatChange_NumChans;
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}
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else{
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debug_printf("Unhandled command\n");
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}
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outct(c_aud_ctl, XS1_CT_END);
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break;
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//SOF
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case inuint_byref(c_sof, tmp):
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unsigned mclk_port_count = 0;
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asm volatile(" getts %0, res[%1]" : "=r" (mclk_port_count) : "r" (p_for_mclk_count));
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/* Assuming 48kHz from a 24.576 master clock (0.0407uS period)
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* MCLK ticks per SOF = 125uS / 0.0407 = 3072 MCLK ticks per SOF.
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* expected Feedback is 48000/8000 = 6 samples. so 0x60000 in 16:16 format.
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* Average over 128 SOFs - 128 x 3072 = 0x60000.
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*/
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unsigned long long feedbackMul = 64ULL;
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if(AUDIO_CLASS == 1)
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feedbackMul = 8ULL; /* TODO Use 4 instead of 8 to avoid windows LSB issues? */
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/* Number of MCLK ticks in this SOF period (E.g = 125 * 24.576 = 3072) */
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int count = (int) ((short)(mclk_port_count - lastClock));
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unsigned long long full_result = count * feedbackMul * DEFAULT_FREQ;
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clockcounter += full_result;
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/* Store MCLK for next time around... */
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lastClock = mclk_port_count;
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/* Reset counts based on SOF counting. Expect 16ms (128 HS SOFs/16 FS SOFS) per feedback poll
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* We always count 128 SOFs, so 16ms @ HS, 128ms @ FS */
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if(sof_count == 128)
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{
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debug_printf("fb\n");
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sof_count = 0;
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clockcounter += mod_from_last_time;
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clocks = clockcounter / MCLK_48;
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mod_from_last_time = clockcounter % MCLK_48;
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if(AUDIO_CLASS == 2)
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{
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clocks <<= 3;
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}
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else
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{
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clocks <<= 6;
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}
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{
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int usb_speed;
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asm volatile("stw %0, dp[g_speed]"::"r"(clocks)); // g_speed = clocks
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if (AUDIO_CLASS == 2)
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{
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fb_clocks[0] = clocks;
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}
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else
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{
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fb_clocks[0] = clocks >> 2;
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}
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}
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clockcounter = 0;
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}
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sof_count++;
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break;
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//Receive samples from host
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case XUD_GetData_Select(c_aud_out, ep_aud_out, length, result):
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num_samples_received_from_host = length / out_subslot_size;
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//debug_printf("out samps: %d\n", num_samples_received_from_host);
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outstanding_samples_to_host += num_samples_received_from_host;
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unpack_buff_to_samples(buffer_aud_out, num_samples_received_from_host, out_subslot_size, loopback_samples);
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num_samples_to_send_to_host = num_samples_received_from_host;
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//Mark EP as ready for next frame from host
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XUD_SetReady_OutPtr(ep_aud_out, (unsigned)buffer_aud_out);
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break;
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//Send feedback
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case XUD_SetData_Select(c_feedback, ep_feedback, result):
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//debug_printf("ep_feedback\n");
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//XUD_SetReady_InPtr(ep_feedback, (unsigned)buffer_feedback, FEEDBACK_BUFF_SIZE);
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if (AUDIO_CLASS == 2)
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{
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XUD_SetReady_In(ep_feedback, (fb_clocks, unsigned char[]), 4);
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}
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else
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{
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XUD_SetReady_In(ep_feedback, (fb_clocks, unsigned char[]), 3);
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}
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break;
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//Send samples to host
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case XUD_SetData_Select(c_aud_in, ep_aud_in, result):
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//debug_printf("sent data\n");
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//Populate the input buffer ready for the next read
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pack_samples_to_buff(loopback_samples, num_samples_to_send_to_host, in_subslot_size, buffer_aud_in);
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//Use the number of samples we received last time so we are always balanced (assumes same in/out count)
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unsigned input_buffer_size = num_samples_to_send_to_host * in_subslot_size;
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XUD_SetReady_InPtr(ep_aud_in, (unsigned)buffer_aud_in, input_buffer_size); //loopback
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num_samples_to_send_to_host = 0;
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break;
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}
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}
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} |