diff options
Diffstat (limited to 'tests/gsm44021/frame_csd_test.c')
-rw-r--r-- | tests/gsm44021/frame_csd_test.c | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/tests/gsm44021/frame_csd_test.c b/tests/gsm44021/frame_csd_test.c new file mode 100644 index 00000000..98efdacb --- /dev/null +++ b/tests/gsm44021/frame_csd_test.c @@ -0,0 +1,93 @@ +#include <stdio.h> +#include <stdlib.h> +#include <stdint.h> +#include <unistd.h> + +#include <osmocom/core/bits.h> +#include <osmocom/isdn/v110.h> +#include <osmocom/gsm/gsm44021.h> + + +static void fill_v110_frame(struct osmo_v110_decoded_frame *fr) +{ + unsigned int i; + + memset(fr, 0, sizeof(*fr)); + + /* we abuse the fact that ubit_t is 8bit so we can actually + * store integer values to clearly identify which bit ends up where */ + + /* D1..D48: 101..148 */ + for (i = 0; i < ARRAY_SIZE(fr->d_bits); i++) + fr->d_bits[i] = 101 + i; + /* E1..E7: 201..207 */ + for (i = 0; i < ARRAY_SIZE(fr->e_bits); i++) + fr->e_bits[i] = 201 + i; + /* S1..S9: 211..219 */ + for (i = 0; i < ARRAY_SIZE(fr->s_bits); i++) + fr->s_bits[i] = 211 + i; + /* X1..X2: 221..222 */ + for (i = 0; i < ARRAY_SIZE(fr->x_bits); i++) + fr->x_bits[i] = 221 + i; +} + + +static void test_frame_enc_12k_6k(void) +{ + struct osmo_v110_decoded_frame fr; + ubit_t bits[60]; + + printf("Testing Frame Encoding for 12k/6k radio interface rate\n"); + + fill_v110_frame(&fr); + + /* run encoder and dump to stdout */ + memset(bits, 0xff, sizeof(bits)); + osmo_csd_12k_6k_encode_frame(bits, sizeof(bits), &fr); + osmo_csd_ubit_dump(stdout, bits, sizeof(bits)); + + /* run decoder on what we just encoded */ + memset(&fr, 0, sizeof(fr)); + osmo_csd_12k_6k_decode_frame(&fr, bits, sizeof(bits)); + + /* re-encode and dump again 'expout' will match it. */ + memset(bits, 0xff, sizeof(bits)); + osmo_csd_12k_6k_encode_frame(bits, sizeof(bits), &fr); + osmo_csd_ubit_dump(stdout, bits, sizeof(bits)); +} + +static void test_frame_enc_3k6(void) +{ + struct osmo_v110_decoded_frame fr; + ubit_t bits[36]; + + printf("Testing Frame Encoding for 3.6k radio interface rate\n"); + + fill_v110_frame(&fr); + /* different D-bit numbering for 3k6, see TS 44.021 Section 8.1.4 */ + for (unsigned int i = 0; i < ARRAY_SIZE(fr.d_bits); i++) + fr.d_bits[i] = 101 + i/2; + + /* run encoder and dump to stdout */ + memset(bits, 0xff, sizeof(bits)); + osmo_csd_3k6_encode_frame(bits, sizeof(bits), &fr); + osmo_csd_ubit_dump(stdout, bits, sizeof(bits)); + + /* run decoder on what we just encoded */ + memset(&fr, 0, sizeof(fr)); + osmo_csd_3k6_decode_frame(&fr, bits, sizeof(bits)); + + /* re-encode and dump again 'expout' will match it. */ + memset(bits, 0xff, sizeof(bits)); + osmo_csd_3k6_encode_frame(bits, sizeof(bits), &fr); + osmo_csd_ubit_dump(stdout, bits, sizeof(bits)); +} + + +int main(int argc, char **argv) +{ + test_frame_enc_12k_6k(); + printf("\n"); + test_frame_enc_3k6(); +} + |