ref: 44a96007b2fc64f366c031a277082c9beaf61b21
dir: /tests/tandem-test.c/
/* (C) 2009 Gregory Maxwell
This test runs pink noise through the encoder and decoder many times
while feeding the output back into the input. It checks that after
a number of cycles the energy has not increased or decreased by too
large an amount.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
- Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
- Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
- Neither the name of the Xiph.org Foundation nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "celt.h"
#include "arch.h"
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <time.h>
#include <unistd.h>
#include <math.h>
#include <string.h>
int async_tandem(int rate, int frame_size, int channels, int bitrate_min,
int bitrate_max)
{
int error;
unsigned char data[648];
CELTMode *mode = NULL;
CELTEncoder *enc;
short carry[2];
short pcm[960 * 2];
CELTDecoder *dec;
int bmin, bmax;
float ms;
int ret, i, j, bytes_per_frame;
int increment = 1;
bmin = floor((bitrate_min / (rate / (float) frame_size)) / 8.0);
bmax = ceil((bitrate_max / (rate / (float) frame_size)) / 8.0);
if (bmin < 8)
bmin = 8;
if (bmax > 640)
bmax = 640;
if (bmin >= bmax)
bmax = bmin + 8;
increment += (bmax - bmin) / 128;
printf ("Testing asynchronous tandeming (%dHz, %dch, %d samples, %d - %d bytes).\n",
rate, channels, frame_size, bmin, bmax);
mode = celt_mode_create(rate, frame_size, &error);
if (mode == NULL || error) {
fprintf(stderr, "Error: failed to create a mode: %s\n", celt_strerror(error));
exit(1);
}
dec = celt_decoder_create(mode, channels, &error);
if (error){
fprintf(stderr, "Error: celt_decoder_create returned %s\n", celt_strerror(error));
exit(1);
}
enc = celt_encoder_create(mode, channels, &error);
if (error){
fprintf(stderr, "Error: celt_encoder_create returned %s\n", celt_strerror(error));
exit(1);
}
for (j = 0; j < frame_size * channels; j++)
pcm[j] = 0;
for (bytes_per_frame = bmin; bytes_per_frame <= bmax;
bytes_per_frame += increment) {
/*Prime the encoder and decoder */
for (i = 0; i < (1024 + (frame_size >> 1)) / frame_size + 2; i++) {
for (j = 0; j < channels; j++)
pcm[j] = pcm[frame_size * channels - (channels - j + 1)];
for (j = channels; j < frame_size * channels - 1; j++)
pcm[j] = ((rand() % 4096) - 2048) + .9 * pcm[j - channels];
ret = celt_encode(enc, pcm, frame_size, data, bytes_per_frame);
if (ret != bytes_per_frame) {
fprintf(stderr, "Error: celt_encode returned %s\n", celt_strerror(ret));
exit(1);
}
ret = celt_decode(dec, data, ret, pcm, frame_size);
if (ret != CELT_OK) {
fprintf(stderr, "Error: celt_decode returned %s\n", celt_strerror(ret));
}
}
for (j = 0; j < channels; j++)
pcm[j] = pcm[frame_size * channels - (channels - j)];
for (j = channels; j < frame_size * channels - 1; j++)
pcm[j] = ((rand() % 4096) - 2048) + .9 * pcm[j - channels];
for (i = 0; i < 8; i++) {
for (j = 0; j < channels; j++)
carry[j] = pcm[frame_size * channels - (channels - j)];
memmove(pcm + channels, pcm, sizeof(short) * frame_size * channels);
for (j = 0; j < channels; j++)
pcm[j] = carry[j];
ret = celt_encode(enc, pcm, frame_size, data, bytes_per_frame);
if (ret != bytes_per_frame) {
fprintf(stderr, "Error: at %d bytes_per_frame celt_encode returned %s\n",
bytes_per_frame, celt_strerror(ret));
exit(1);
}
ret = celt_decode(dec, data, ret, pcm, frame_size);
if (ret != CELT_OK) {
fprintf(stderr, "Error: at %d bytes_per_frame celt_decode returned %s\n",
bytes_per_frame, celt_strerror(ret));
exit(1);
}
}
ms = 0;
for (j = 0; j < frame_size * channels; j++)
ms += pcm[j] * pcm[j];
ms = sqrt(ms / (frame_size * channels));
if (ms > 7000 || ms < 1000) {
fprintf(stderr, "Error: Signal out of expected range. %d %d %d %d %f\n",
rate, channels, frame_size, bytes_per_frame, ms);
exit(1);
}
}
celt_encoder_destroy(enc);
celt_decoder_destroy(dec);
celt_mode_destroy(mode);
return 0;
}
int main(int argc, char *argv[])
{
int sizes[8]={960,480,240,120,512,256,128,64};
unsigned int seed;
int ch, n;
if (argc > 2) {
fprintf(stderr, "Usage: %s [<seed>]\n", argv[0]);
return 1;
}
if (argc > 1)
seed = atoi(argv[1]);
else
seed = (time(NULL) ^ ((getpid() % 65536) << 16));
srand(seed);
printf("CELT codec tests. Random seed: %u (%.4X)\n", seed, rand() % 65536);
for (n = 0; n < 8; n++) {
for (ch = 1; ch <= 2; ch++) {
async_tandem(48000, sizes[n], ch, 12000 * ch, 128000 * ch);
async_tandem(44100, sizes[n], ch, 12000 * ch, 128000 * ch);
async_tandem(32000, sizes[n], ch, 12000 * ch, 128000 * ch);
async_tandem(16000, sizes[n], ch, 12000 * ch, 64000 * ch);
}
}
return 0;
}