diff options
Diffstat (limited to 'src/test_streams')
| -rw-r--r-- | src/test_streams/main.c | 50 |
1 files changed, 44 insertions, 6 deletions
diff --git a/src/test_streams/main.c b/src/test_streams/main.c index 36a26dc2..f6c1eadd 100644 --- a/src/test_streams/main.c +++ b/src/test_streams/main.c @@ -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; } } |