claunia/flac
1
0
Fork 0
mirror of https://github.com/claunia/flac.git synced 2025-12-16 18:54:26 +00:00
Code Issues Packages Projects Releases Wiki Activity

src/test_streams: Generate signed and unsigned RAW files

Browse Source
This commit is contained in:
Erik de Castro Lopo
2015-09-07 12:30:59 +10:00
parent bb6f643fdc
commit a9434ddff1
1 changed files with 44 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

50
src/test_streams/main.c
View File

@@ -43,7 +43,7 @@
static FLAC__bool is_big_endian_host;
static FLAC__bool write_little_endian(FILE *f, FLAC__int32 x, size_t bytes)
static FLAC__bool write_little_endian_unsigned(FILE *f, FLAC__uint32 x, size_t bytes)
{
while(bytes) {
if(fputc(x, f) == EOF)
@@ -54,6 +54,11 @@ static FLAC__bool write_little_endian(FILE *f, FLAC__int32 x, size_t bytes)
return true;
}
static FLAC__bool write_little_endian_signed(FILE *f, FLAC__int32 x, size_t bytes)
{
return write_little_endian_unsigned(f, (FLAC__uint32) x, bytes);
}
static FLAC__bool write_little_endian_uint16(FILE *f, FLAC__uint16 x)
{
return
@@ -595,7 +600,7 @@ foo:
return false;
}
static FLAC__bool generate_raw(const char *filename, unsigned channels, unsigned bytes_per_sample, unsigned samples)
static FLAC__bool generate_signed_raw(const char *filename, unsigned channels, unsigned bytes_per_sample, unsigned samples)
{
const FLAC__int32 full_scale = (1 << (bytes_per_sample*8-1)) - 1;
const double f1 = 441.0, a1 = 0.61, f2 = 661.5, a2 = 0.37;
@@ -612,7 +617,37 @@ static FLAC__bool generate_raw(const char *filename, unsigned channels, unsigned
for(j = 0; j < channels; j++) {
double val = (a1*sin(theta1) + a2*sin(theta2))*(double)full_scale;
FLAC__int32 v = (FLAC__int32)(val + 0.5) + ((GET_RANDOM_BYTE>>4)-8);
if(!write_little_endian(f, v, bytes_per_sample))
if(!write_little_endian_signed(f, v, bytes_per_sample))
goto foo;
}
}
fclose(f);
return true;
foo:
fclose(f);
return false;
}
static FLAC__bool generate_unsigned_raw(const char *filename, unsigned channels, unsigned bytes_per_sample, unsigned samples)
{
const FLAC__int32 full_scale = (1 << (bytes_per_sample*8-1)) - 1;
const double f1 = 441.0, a1 = 0.61, f2 = 661.5, a2 = 0.37;
const double delta1 = 2.0 * M_PI / ( 44100.0 / f1);
const double delta2 = 2.0 * M_PI / ( 44100.0 / f2);
const double half_scale = 0.5 * full_scale;
double theta1, theta2;
FILE *f;
unsigned i, j;
if(0 == (f = flac_fopen(filename, "wb")))
return false;
for(i = 0, theta1 = theta2 = 0.0; i < samples; i++, theta1 += delta1, theta2 += delta2) {
for(j = 0; j < channels; j++) {
double val = (a1*sin(theta1) + a2*sin(theta2))*(double)full_scale;
FLAC__int32 v = (FLAC__int32)(half_scale + val + 0.5) + ((GET_RANDOM_BYTE>>4)-8);
if(!write_little_endian_unsigned(f, v, bytes_per_sample))
goto foo;
}
}
@@ -815,7 +850,7 @@ static FLAC__bool generate_wav(const char *filename, unsigned sample_rate, unsig
for(j = 0; j < channels; j++) {
double val = (a1*sin(theta1) + a2*sin(theta2))*(double)full_scale;
FLAC__int32 v = ((FLAC__int32)(val + 0.5) + ((GET_RANDOM_BYTE>>4)-8)) << shift;
if(!write_little_endian(f, v, bytes_per_sample))
if(!write_little_endian_signed(f, v, bytes_per_sample))
goto foo;
}
}
@@ -1239,8 +1274,11 @@ int main(int argc, char *argv[])
return 1;
if(bits_per_sample % 8 == 0) {
flac_snprintf(fn, sizeof (fn), "rt-%u-%u-%u.raw", channels, bits_per_sample, nsamples[samples]);
if(!generate_raw(fn, channels, bits_per_sample/8, nsamples[samples]))
flac_snprintf(fn, sizeof (fn), "rt-%u-%u-signed-%u.raw", channels, bits_per_sample, nsamples[samples]);
if(!generate_signed_raw(fn, channels, bits_per_sample/8, nsamples[samples]))
return 1;
flac_snprintf(fn, sizeof (fn), "rt-%u-%u-unsigned-%u.raw", channels, bits_per_sample, nsamples[samples]);
if(!generate_unsigned_raw(fn, channels, bits_per_sample/8, nsamples[samples]))
return 1;
}
}