ref: 39f68ac99735ddf504f50ea64bd8872e324c947e
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) { unsigned char data[250]; CELTMode *mode = NULL; CELTEncoder *enc; short carry[2]; short pcm[512 * 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 < 12) bmin = 12; if (bmax > 250) bmax = 250; if (bmin >= bmax) bmax = bmin + 8; /*increment += (bmax - bmin) / 64; */ printf ("Testing asynchronous tandeming (%dHz, %dch, %d samples, %d - %d bytes).\n", rate, channels, frame_size, bmin, bmax); mode = celt_mode_create(rate, channels, frame_size, NULL); if (mode == NULL) { fprintf(stderr, "Error: failed to create a mode\n"); exit(1); } dec = celt_decoder_create(mode); enc = celt_encoder_create(mode); 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, NULL, data, bytes_per_frame); if (ret != bytes_per_frame) { fprintf(stderr, "Error: during init celt_encode returned %d\n", ret); exit(1); } ret = celt_decode(dec, data, ret, pcm); if (ret != CELT_OK) { fprintf(stderr, "Error: during init celt_decode returned %d\n", 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, NULL, data, bytes_per_frame); if (ret != bytes_per_frame) { fprintf(stderr, "Error: at %d bytes_per_frame celt_encode returned %d\n", bytes_per_frame, ret); exit(1); } ret = celt_decode(dec, data, ret, pcm); if (ret != CELT_OK) { fprintf(stderr, "Error: at %d bytes_per_frame celt_decode returned %d\n", bytes_per_frame, 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[]) { 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 = 6; n < 10; n++) { for (ch = 1; ch <= 2; ch++) { async_tandem(44100, 1 << n, ch, 47000 * ch, 77000 * ch); async_tandem(48000, 1 << n, ch, 47000 * ch, 77000 * ch); async_tandem(32000, 1 << n, ch, 31000 * ch, 65000 * ch); } } for (ch = 1; ch <= 2; ch++) async_tandem(32000, 320, ch, 31000 * ch, 65000 * ch); for (ch = 1; ch <= 2; ch++) async_tandem(48000, 480, ch, 31000 * ch, 77000 * ch); return 0; }