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seeking in stb_vorbis (Dougall Johnson)

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test program for seeking (stb)
This commit is contained in:
Sean Barrett
2015-08-30 19:29:35 -07:00
parent c9859afcf9
commit ebb54fd7a3
4 changed files with 446 additions and 285 deletions
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14
tests/stb.dsw
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@ -63,7 +63,7 @@ Package=<4>
###############################################################################
Project: "resize"=.\resize\resize.dsp - Package Owner=<4>
Project: "resize"=.\resize.dsp - Package Owner=<4>
Package=<5>
{{{
@ -123,6 +123,18 @@ Package=<4>
###############################################################################
Project: "vorbseek"=.\vorbseek\vorbseek.dsp - Package Owner=<4>
Package=<5>
{{{
}}}
Package=<4>
{{{
}}}
###############################################################################
Global:
Package=<5>

105
tests/vorbseek/vorbseek.c Normal file
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@ -0,0 +1,105 @@
#include <assert.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#define STB_VORBIS_HEADER_ONLY
#include "stb_vorbis.c"
#define SAMPLES_TO_TEST 3000
int test_count [5] = { 5000, 3000, 2000, 50000, 50000 };
int test_spacing[5] = { 1, 111, 3337, 7779, 72717 };
int try_seeking(stb_vorbis *v, unsigned int pos, short *output, unsigned int num_samples)
{
int count;
short samples[SAMPLES_TO_TEST*2];
assert(pos <= num_samples);
if (!stb_vorbis_seek(v, pos)) {
fprintf(stderr, "Seek to %u returned error from stb_vorbis\n", pos);
return 0;
}
count = stb_vorbis_get_samples_short_interleaved(v, 2, samples, SAMPLES_TO_TEST*2);
if (count > (int) (num_samples - pos)) {
fprintf(stderr, "Seek to %u allowed decoding %d samples when only %d should have been valid.\n",
pos, count, (int) (num_samples - pos));
return 0;
}
if (count < SAMPLES_TO_TEST && count < (int) (num_samples - pos)) {
fprintf(stderr, "Seek to %u only decoded %d samples of %d attempted when at least %d should have been valid.\n",
pos, count, SAMPLES_TO_TEST, num_samples - pos);
return 0;
}
if (0 != memcmp(samples, output + pos*2, count*2)) {
int k;
for (k=0; k < SAMPLES_TO_TEST*2; ++k) {
if (samples[k] != output[k]) {
fprintf(stderr, "Seek to %u produced incorrect samples starting at sample %u (short #%d in buffer).\n",
pos, pos + (k/2), k);
break;
}
}
assert(k != SAMPLES_TO_TEST*2);
return 0;
}
return 1;
}
int main(int argc, char **argv)
{
int num_chan, samprate;
int i, j, test, phase;
short *output;
if (argc == 1) {
fprintf(stderr, "Usage: vorbseek {vorbisfile} [{vorbisfile]*]\n");
fprintf(stderr, "Tests various seek offsets to make sure they're sample exact.\n");
return 0;
}
for (j=1; j < argc; ++j) {
unsigned int successes=0, attempts = 0;
unsigned int num_samples = stb_vorbis_decode_filename(argv[j], &num_chan, &samprate, &output);
if (num_samples == 0xffffffff) {
fprintf(stderr, "Error: couldn't open file or not vorbis file: %s\n", argv[j]);
goto fail;
}
if (num_chan != 2) {
fprintf(stderr, "vorbseek testing only works with files with 2 channels, %s has %d\n", argv[j], num_chan);
goto fail;
}
for (test=0; test < 5; ++test) {
int error;
stb_vorbis *v = stb_vorbis_open_filename(argv[j], &error, NULL);
if (v == NULL) {
fprintf(stderr, "Couldn't re-open %s for test #%d\n", argv[j], test);
goto fail;
}
for (phase=0; phase < 3; ++phase) {
unsigned int base = phase == 0 ? 0 : phase == 1 ? num_samples - test_count[test]*test_spacing[test] : num_samples/3;
for (i=0; i < test_count[test]; ++i) {
unsigned int pos = base + i*test_spacing[test];
if (pos > num_samples) // this also catches underflows
continue;
successes += try_seeking(v, pos, output, num_samples);
attempts += 1;
}
}
stb_vorbis_close(v);
}
printf("%d of %d seeks failed in %s (%d samples)\n", attempts-successes, attempts, argv[j], num_samples);
free(output);
}
return 0;
fail:
return 1;
}

96
tests/vorbseek/vorbseek.dsp Normal file
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@ -0,0 +1,96 @@
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