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Move pack/unpack to external helper

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This commit is contained in:
Ed Clarke
2018-11-14 10:05:00 +00:00
parent ca7ee58883
commit 6333ca5621
2 changed files with 65 additions and 65 deletions
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65
examples/xua_lite_example/src/xua_buffer_lite.xc
View File

@@ -30,71 +30,6 @@
#define OUT_AUDIO_BUFFER_SIZE_BYTES (MAX_OUT_SAMPLES_PER_SOF_PERIOD * MAX_OUTPUT_SLOT_SIZE)
#define IN_AUDIO_BUFFER_SIZE_BYTES (MAX_IN_SAMPLES_PER_SOF_PERIOD * MAX_INPUT_SLOT_SIZE)
//Helper to disassemble USB packets into 32b left aligned audio samples
#pragma unsafe arrays
static inline void unpack_buff_to_samples(unsigned char input[], const unsigned n_samples, const unsigned slot_size, int output[]){
switch(slot_size){
case 4:
for (int i = 0; i < n_samples; i++){
unsigned base = i * 4;
output[i] = (input[base + 3] << 24) | (input[base + 2] << 16) | (input[base + 1] << 8) | input[base + 0];
}
break;
case 3:
for (int i = 0; i < n_samples; i++){
unsigned base = i * 3;
output[i] = (input[base + 2] << 24) | (input[base + 1] << 16) | (input[base + 0] << 8);
}
break;
case 2:
for (int i = 0; i < n_samples; i++){
unsigned base = i * 2;
output[i] = (input[base + 1] << 24) | (input[base + 0] << 16);
}
break;
default:
debug_printf("Invalid slot_size\n");
break;
}
}
//Helper to assemble USB packets from 32b left aligned audio samples
#pragma unsafe arrays
static inline void pack_samples_to_buff(int input[], const unsigned n_samples, const unsigned slot_size, unsigned char output[]){
switch(slot_size){
case 4:
for (int i = 0; i < n_samples; i++){
unsigned base = i * 4;
unsigned in_word = (unsigned)input[i];
output[base + 0] = in_word & 0xff;
output[base + 1] = (in_word & 0xff00) >> 8;
output[base + 2] = (in_word & 0xff0000) >> 16;
output[base + 3] = (in_word) >> 24;
}
break;
case 3:
for (int i = 0; i < n_samples; i++){
unsigned base = i * 3;
unsigned in_word = (unsigned)input[i];
output[base + 0] = (in_word & 0xff00) >> 8;
output[base + 1] = (in_word & 0xff0000) >> 16;
output[base + 2] = (in_word) >> 24;
}
break;
case 2:
for (int i = 0; i < n_samples; i++){
unsigned base = i * 2;
unsigned in_word = (unsigned)input[i];
output[base + 0] = (in_word & 0xff0000) >> 16;
output[base + 1] = (in_word) >> 24;
}
break;
default:
debug_printf("Invalid slot_size\n");
break;
}
}
static void do_feedback_calculation(unsigned &sof_count
,const unsigned mclk_hz

65
examples/xua_lite_example/src/xua_buffer_pack.h Normal file
View File

@@ -0,0 +1,65 @@
//Helper to disassemble USB packets into 32b left aligned audio samples
#pragma unsafe arrays
static inline void unpack_buff_to_samples(unsigned char input[], const unsigned n_samples, const unsigned slot_size, int output[]){
switch(slot_size){
case 4:
for (int i = 0; i < n_samples; i++){
unsigned base = i * 4;
output[i] = (input[base + 3] << 24) | (input[base + 2] << 16) | (input[base + 1] << 8) | input[base + 0];
}
break;
case 3:
for (int i = 0; i < n_samples; i++){
unsigned base = i * 3;
output[i] = (input[base + 2] << 24) | (input[base + 1] << 16) | (input[base + 0] << 8);
}
break;
case 2:
for (int i = 0; i < n_samples; i++){
unsigned base = i * 2;
output[i] = (input[base + 1] << 24) | (input[base + 0] << 16);
}
break;
default:
debug_printf("Invalid slot_size\n");
break;
}
}
//Helper to assemble USB packets from 32b left aligned audio samples
#pragma unsafe arrays
static inline void pack_samples_to_buff(int input[], const unsigned n_samples, const unsigned slot_size, unsigned char output[]){
switch(slot_size){
case 4:
for (int i = 0; i < n_samples; i++){
unsigned base = i * 4;
unsigned in_word = (unsigned)input[i];
output[base + 0] = in_word & 0xff;
output[base + 1] = (in_word & 0xff00) >> 8;
output[base + 2] = (in_word & 0xff0000) >> 16;
output[base + 3] = (in_word) >> 24;
}
break;
case 3:
for (int i = 0; i < n_samples; i++){
unsigned base = i * 3;
unsigned in_word = (unsigned)input[i];
output[base + 0] = (in_word & 0xff00) >> 8;
output[base + 1] = (in_word & 0xff0000) >> 16;
output[base + 2] = (in_word) >> 24;
}
break;
case 2:
for (int i = 0; i < n_samples; i++){
unsigned base = i * 2;
unsigned in_word = (unsigned)input[i];
output[base + 0] = (in_word & 0xff0000) >> 16;
output[base + 1] = (in_word) >> 24;
}
break;
default:
debug_printf("Invalid slot_size\n");
break;
}
}