codec2/unittest/tfreedv_800XA_rawdata.c

/*---------------------------------------------------------------------------*\

  FILE........: tfreedv_800XA_rawdata.c
  AUTHOR......: Jeroen Vreeken
  DATE CREATED: 24 May 2020

  FreeDV 800XA rawdata test.

\*---------------------------------------------------------------------------*/

/*
  Copyright (C) 2020 Jeroen Vreeken <jeroen@vreeken.net>

  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2.1 of the License, or (at your option) any later version.

  This library is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  Lesser General Public License for more details.


  You should have received a copy of the GNU Lesser General Public License
  along with this program; if not, see <http://www.gnu.org/licenses/>.
*/

#include <stdio.h>

#include "assert.h"
#include "freedv_api.h"

int main(int argc, char **argv) {
  struct freedv *f;
  int i;

  printf("freedv_api tests for mode 800XA\n");

  printf("freedv_open(FREEDV_MODE_800XA) ");
  f = freedv_open(FREEDV_MODE_800XA);
  assert(f != NULL);
  printf("Passed\n");

  printf("freedv_get_mode() ");
  int mode = freedv_get_mode(f);
  assert(mode == FREEDV_MODE_800XA);
  printf("Passed\n");

  printf("freedv_get_n_max_modem_samples() ");
  int max_samples = freedv_get_n_max_modem_samples(f);
  assert(max_samples == 660);
  printf("%d Passed\n", max_samples);

  printf("freedv_get_n_nom_modem_samples() ");
  int nom_samples = freedv_get_n_nom_modem_samples(f);
  assert(nom_samples == 640);
  printf("%d Passed\n", nom_samples);

  printf("freedv_get_n_speech_samples() ");
  int speech_samples = freedv_get_n_speech_samples(f);
  assert(speech_samples == 640);
  printf("%d Passed\n", speech_samples);

  printf("freedv_get_n_bits_per_codec_frame() ");
  int codec_bits = freedv_get_bits_per_codec_frame(f);
  assert(codec_bits == 28);
  printf("%d Passed\n", codec_bits);

  printf("freedv_get_n_bits_per_modem_frame() ");
  int frame_bits = freedv_get_bits_per_modem_frame(f);
  assert(frame_bits == 56);
  printf("%d Passed\n", frame_bits);

  /* Note: A codec frame is only 3.5 bytes!
     so the fourth and eight bytes will be half empty!
  */
  unsigned char payload[8] = {0x12, 0x34, 0x56, 0x70, 0x89, 0xab, 0xcd, 0xe0};
  unsigned char payload_tx[7] = {0x12, 0x34, 0x56, 0x78, 0x9a, 0xbc, 0xde};

  printf("freedv_codec_frames_from_rawdata() ");
  unsigned char codec_frames[8] = {0};
  freedv_codec_frames_from_rawdata(f, codec_frames, payload_tx);
  int fails = 0;
  for (i = 0; i < 8; i++) {
    if (codec_frames[i] != payload[i]) {
      printf("byte %d: 0x%02x does not match expected 0x%02x\n", i,
             codec_frames[i], payload[i]);
      fails++;
    }
  }
  if (fails) goto fail;
  printf("Passed\n");

  printf("freedv_rawdata_from_codec_frames() ");
  unsigned char rawdata[7] = {0};
  freedv_rawdata_from_codec_frames(f, rawdata, payload);
  fails = 0;
  for (i = 0; i < 7; i++) {
    if (rawdata[i] != payload_tx[i]) {
      printf("byte %d: 0x%02x does not match expected 0x%02x\n", i, rawdata[i],
             payload_tx[i]);
      fails++;
    }
  }
  if (fails) goto fail;
  printf("Passed\n");

  printf("freedv_rawdatatx()/freedv_rawdatarx() ");
  int frames = 0;
  fails = 0;
  {
    short mod[nom_samples * 10];
    for (i = 0; i < 10; i++) {
      freedv_rawdatatx(f, mod + i * nom_samples, payload_tx);
    }
    int nin = 0;
    for (i = 0; i < nom_samples * 9; i += nin) {
      nin = freedv_nin(f);
      unsigned char payload_rx[8] = {0};
      int r = freedv_rawdatarx(f, payload_rx, mod + i);
      if (r == 7) {
        int b;
        for (b = 0; b < 7; b++) {
          if (payload_tx[b] != payload_rx[b]) {
            printf("Received codec bits 0x%02x do not match expected 0x%02x\n",
                   payload_rx[b], payload_tx[b]);
            fails++;
          }
        }
        frames++;
      }
    }
  }
  if (!frames) {
    printf("Did not decode any frames successfully\n");
    goto fail;
  }
  if (fails) goto fail;
  printf("Passed\n");

  printf("Tests passed\n");
  return 0;
fail:
  printf("Test failed\n");
  return 1;
}