mirror of https://gerrit.osmocom.org/libosmocore
147 lines
5.5 KiB
C
147 lines
5.5 KiB
C
#include <stdio.h>
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#include <stdint.h>
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#include <string.h>
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#include <osmocom/core/bitvec.h>
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#include <osmocom/core/utils.h>
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#include <osmocom/codec/codec.h>
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#include <osmocom/codec/ecu.h>
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/* Set with sample full-rate voice frames and some intentional dropouts */
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static const char *fr_frames_hex[] = {
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"d9aa93ae63de00471a91b95b8660471392b4a2daa037628f391c624039258dc723",
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"d8eb83699a66c036ec89b7246e6034dc8d48948620589b7256e3a6603b2371b8da",
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"d967abaa1cbe4035238da6ace4c036d46ec69ba600391c4eb8a2b040591c6a3924",
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"d8e8a42662c240472469b91bd2e0452291b6dba600495b8e38dcb020491a71c91b",
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"da2aac1ddbb00036e46e26dcec6039138db923822047137248e3560048e38dc8e3",
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"d929ab2a9b5240395b6dc72ba020469c8d551c5440349c9148e36a4036a372471b",
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"d9eb93215bb8a0271c69c724682036db71c71a94a0372491b72bee4044eb71b923",
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"d9ab9aa19abc40391b6e5ae2ee40471b91c6dbe820492291b8e4b84036e47238db",
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"d96b9be9db782044e371b55cb200389491c69b8ea034e271c8d3808038ec6db8e3",
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"d9aa9365e3f060375c6db6ebc4c02764b1c51b78a0571c91a723de6049248dc8dd",
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"BAD",
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"d9ea9c219ce60046e38d3724e0c034e56e36eb7e0038d471b8dcb260491b8dbb23",
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"d9e89be9d9e0a0391b6dd6a4624029247138e3a2a04713922524de0036db69d91c",
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"d9699422a2b6a048dd90c91c6a802b6259395c8880575b4a58e4ac20269d7248d4",
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"d967ac5b1baae0371c71b8ab9c804a9e8e58a55a8038626ec8dcb640395c7244dc",
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"d9e8a3e262e68027638db52b88a038634e471a7ec049136e3b1bc8402923adcad2",
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"d8eab36e1bbe0046e34d491b608035137658d3524044e48e375cdac0472b9238d4",
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"d9689ba5e3d260491b516adb5e4027256e27227ee0351c8e549a5c60492471971b",
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"BAD",
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"BAD",
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"d8e6a2e1d3d2605b1376c8d35280392451391cbc80392a71b6db8aa049238dc8ab",
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"d9a87ba1a3982048eb8a471cac00472b4e391bbc40292489b71cc200495b8d3ae3",
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"d9278b2a1ba4c0475b8dc722d6e0491b5228da70204ae36dc71d94a056a29236e3",
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"d9ec9be2129520392335598c50c04b5bad3d4ba680789b69df5a5aa0469cd1b4da",
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"d8ea932623e660669b8e4a9dd8a03aa32a76e466e028d396cc9bbe4047256dc8e5",
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"d96a94215aa0403aab713f22e8e024e68db91ab6a027abd1a55b6e804aec9146e4",
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"d867ac21e270a0350d6ac91a724037247246d2a6c0396c89d6dc562049244e48d5",
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"d8a9b460d3b48026a4ad471b7c20452491b69bbc803ae48db722ee00292491a8db",
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"d928a3e1d3b24036e37244abf02047634d371b74c047637148a29ac03b234e38e3",
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"d9ab9b21d2e0c0471c693aec54e044dbae46dc7c20391badb724ee8038e469bb15",
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"d9a99361a276403b1a6ad6dcd40026e489c8e3bc40371c4dc564e2c036e28eb963",
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"BAD",
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"BAD",
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"BAD",
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"BAD",
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"BAD",
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"BAD",
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"d92c8b6d5aee4034ebb22724862047145634a5c0a038e371b8e4a880485c89dd25",
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"d8e78b29e3c6c038dba9d91beca04723ad491cda80471471b6ec7ae03b1396b91b",
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"d8a78b25e37a0022dd8a46dc68a0351bad391bde2046e56dd8dc96c038e396d89b",
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"d8a88c255ab6e038e38e48dbde8038ad8dc8db8ec0376372b564b44038e49234dc",
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"d9708ce6a39ce049646646a2c1a0272496b29a66c037db562863ace0795b55b2e3",
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"d8ee9bea5ae4003ae371b713eae05adc91995a5ea064dcc9571e786026ed51c52c",
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"d9299421d2944036ed69b8e572a048e36d551cd480571d4ec95be680356c69c763",
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"d92aab696190c046e26e392cae0026a376a8dc662048d291b75b54c04ad3ae3b1b",
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"d8e7a469627a6038e289cb1baca0569b8db6dddec026dc8e38e5dc803722722d23",
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"d8a88c299b64c03a548a58e37420272c6dd76b92c0471c9236dbc0e0551c71c713",
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"BAD",
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"d7299c19a3be8024e58ea7a49f20a522963ad976e0a76ecd92b38500cb62aa4c94",
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"d7eb6c6262eee02b2c42e79a60a0aa55aed68a7f00ad358e10fad960e55a39396d",
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"d970858dd2ab61d91355ebc15ca1a6a7ca48a05cc0dae66f2523c2a1bad3825daa",
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"d8f0844a23ad20da50d6de025e81c37392b9039cc0c764c1bd1e94c1b699736a98",
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"d9708ce6a39ce049646646a2c1a0272496b29a66c037db562863ace0795b55b2e3",
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"d9299421d2944036ed69b8e572a048e36d551cd480571d4ec95be680356c69c763",
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"d9299421d2944036ed69b8e572a048e36d551cd480571d4ec95be680356c69c763",
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"d9299421d2944036ed69b8e572a048e36d551cd480571d4ec95be680356c69c763",
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"d2577a1cda50004924924924500049249249245000492492492450004923924924",
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NULL
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};
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/* Example of a good frame */
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static const char *sample_frame_hex = \
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"d9ec9be212901f802335598c501f805bad3d4ba01f809b69df5a501f809cd1b4da";
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/**
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* Start with a good voice frame and then simulate 20 consecutive bad frames,
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* watching how the error concealment decreases the XMAXC parameters.
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*/
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void test_fr_concealment(void)
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{
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struct osmo_ecu_fr_state state;
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uint8_t frame[GSM_FR_BYTES];
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int i, rc;
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/* Parse frame from string to hex */
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osmo_hexparse(sample_frame_hex, frame, GSM_FR_BYTES);
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printf("Start with: %s\n", sample_frame_hex);
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/* Reset the ECU with the proposed known good frame */
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osmo_ecu_fr_reset(&state, frame);
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/* Now pretend that we do not receive any good frames anymore */
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for (i = 0; i < 20; i++) {
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rc = osmo_ecu_fr_conceal(&state, frame);
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OSMO_ASSERT(rc == 0);
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printf("conceal: %02i, result: %s\n",
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i, osmo_hexdump_nospc(frame, GSM_FR_BYTES));
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}
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}
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/* Simulate a real life situation: voice frames with a few dropouts */
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void test_fr_concealment_realistic()
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{
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struct osmo_ecu_fr_state state;
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uint8_t frame[GSM_FR_BYTES];
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unsigned int frame_len;
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int rc, i = 0;
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while (fr_frames_hex[i] != NULL) {
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/* Debug print */
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printf("Frame No. %03i:\n", i);
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/* Good or bad frame? */
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frame_len = strlen(fr_frames_hex[i]) / 2;
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if (frame_len == GSM_FR_BYTES) {
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printf(" * input: %s\n", fr_frames_hex[i]);
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osmo_hexparse(fr_frames_hex[i], frame, GSM_FR_BYTES);
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osmo_ecu_fr_reset(&state, frame);
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} else {
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printf(" * input: (bad)\n");
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memset(frame, 0x00, GSM_FR_BYTES);
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rc = osmo_ecu_fr_conceal(&state, frame);
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OSMO_ASSERT(rc == 0);
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}
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/* Print result */
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printf(" * output: %s\n",
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osmo_hexdump_nospc(frame, GSM_FR_BYTES));
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/* Go to the next frame */
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i++;
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}
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}
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int main(int argc, char **argv)
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{
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/* Perform actual tests */
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test_fr_concealment();
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test_fr_concealment_realistic();
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return 0;
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}
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