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add 8 bit IQ support

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Steve Markgraf 2025-03-03 23:17:34 +01:00
parent 768c4f5900
commit de7c63b090
3 changed files with 31 additions and 0 deletions
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1
include/format_convert.h
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@ -4,6 +4,7 @@
void hsdaoh_unpack_pio_12bit(hsdaoh_dev_t *dev, hsdaoh_data_info_t *data_info);
void hsdaoh_unpack_pio_12bit_dual(hsdaoh_dev_t *dev, hsdaoh_data_info_t *data_info);
void hsdaoh_unpack_pio_10bit_iq(hsdaoh_dev_t *dev, hsdaoh_data_info_t *data_info);
void hsdaoh_unpack_pio_8bit_iq(hsdaoh_dev_t *dev, hsdaoh_data_info_t *data_info);
void hsdaoh_unpack_pio_pcm1802_audio(hsdaoh_dev_t *dev, hsdaoh_data_info_t *data_info);
void hsdaoh_unpack_fpga_12bit_dual(hsdaoh_dev_t *dev, hsdaoh_data_info_t *data_info);
#endif

27
src/format_convert.c
View file

@ -133,6 +133,33 @@ void hsdaoh_unpack_pio_12bit_dual(hsdaoh_dev_t *dev, hsdaoh_data_info_t *data_in
free(out16_2);
}
// We receive the samples as 16 bit words containing 8 bit I, 8 bit Q
void hsdaoh_unpack_pio_8bit_iq(hsdaoh_dev_t *dev, hsdaoh_data_info_t *data_info)
{
uint16_t *in = (uint16_t *)data_info->buf;
size_t inlen = data_info->len / sizeof(uint16_t);
uint16_t *iq_samps = malloc(sizeof(uint16_t) * dev->width * dev->height * 2 * 2);
unsigned int i = 0;
unsigned int out_samps = 0;
for (i = 0; i < inlen; i++) {
iq_samps[out_samps++] = in[i] & 0xff;
iq_samps[out_samps++] = in[i] >> 8;
}
if (dev->output_float) {
hsdaoh_16bit_to_float(dev, data_info, iq_samps, out_samps, 127.5, false);
} else {
data_info->buf = (uint8_t *)in;
data_info->len = inlen;
dev->cb(data_info);
}
free(iq_samps);
}
// We receive five 16-bit words containing four 20-bit samples (sample A - D)
// First word: A15 A14 A13 A12 A11 A10 A09 A08 A07 A06 A05 A04 A03 A02 A01 A00
// Second word: A19 A18 A17 A16 B11 B10 B09 B08 B07 B06 B05 B04 B03 B02 B01 B00

3
src/libhsdaoh.c
View file

@ -546,6 +546,9 @@ void hsdaoh_output(hsdaoh_dev_t *dev, uint16_t sid, int format, uint8_t *data, s
data_info.len = len;
switch (format) {
case PIO_8BIT_IQ:
hsdaoh_unpack_pio_8bit_iq(dev, &data_info);
break;
case PIO_10BIT_IQ:
hsdaoh_unpack_pio_10bit_iq(dev, &data_info);
break;