From 51133a7db0a4a62ea05d4aacd31aa0cf9cedf0ec Mon Sep 17 00:00:00 2001 From: Fabrice Bellard Date: Sat, 18 May 2002 23:18:22 +0000 Subject: added first version of regression tests - simply type 'make test' to test every codec and some mux/demuxes - added simple synthetic audio and video bitstreams generators so that no big streams needs to be used Originally committed as revision 532 to svn://svn.ffmpeg.org/ffmpeg/trunk --- tests/audiogen.c | 168 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 168 insertions(+) create mode 100644 tests/audiogen.c (limited to 'tests/audiogen.c') diff --git a/tests/audiogen.c b/tests/audiogen.c new file mode 100644 index 0000000000..4913a6ced8 --- /dev/null +++ b/tests/audiogen.c @@ -0,0 +1,168 @@ +/* + * Generates a synthetic stereo sound + * NOTE: no floats are used to guaranty a bit exact output. + */ +#include +#include + +#define NB_CHANNELS 2 +#define FE 44100 + +static unsigned int myrnd(unsigned int *seed_ptr, int n) +{ + unsigned int seed, val; + + seed = *seed_ptr; + seed = (seed * 314159) + 1; + if (n == 256) { + val = seed >> 24; + } else { + val = seed % n; + } + *seed_ptr = seed; + return val; +} + +#define FRAC_BITS 16 +#define FRAC_ONE (1 << FRAC_BITS) + +#define COS_TABLE_BITS 7 + +/* integer cosinus */ +static const unsigned short cos_table[(1 << COS_TABLE_BITS) + 2] = { + 0x8000, 0x7ffe, 0x7ff6, 0x7fea, 0x7fd9, 0x7fc2, 0x7fa7, 0x7f87, + 0x7f62, 0x7f38, 0x7f0a, 0x7ed6, 0x7e9d, 0x7e60, 0x7e1e, 0x7dd6, + 0x7d8a, 0x7d3a, 0x7ce4, 0x7c89, 0x7c2a, 0x7bc6, 0x7b5d, 0x7aef, + 0x7a7d, 0x7a06, 0x798a, 0x790a, 0x7885, 0x77fb, 0x776c, 0x76d9, + 0x7642, 0x75a6, 0x7505, 0x7460, 0x73b6, 0x7308, 0x7255, 0x719e, + 0x70e3, 0x7023, 0x6f5f, 0x6e97, 0x6dca, 0x6cf9, 0x6c24, 0x6b4b, + 0x6a6e, 0x698c, 0x68a7, 0x67bd, 0x66d0, 0x65de, 0x64e9, 0x63ef, + 0x62f2, 0x61f1, 0x60ec, 0x5fe4, 0x5ed7, 0x5dc8, 0x5cb4, 0x5b9d, + 0x5a82, 0x5964, 0x5843, 0x571e, 0x55f6, 0x54ca, 0x539b, 0x5269, + 0x5134, 0x4ffb, 0x4ec0, 0x4d81, 0x4c40, 0x4afb, 0x49b4, 0x486a, + 0x471d, 0x45cd, 0x447b, 0x4326, 0x41ce, 0x4074, 0x3f17, 0x3db8, + 0x3c57, 0x3af3, 0x398d, 0x3825, 0x36ba, 0x354e, 0x33df, 0x326e, + 0x30fc, 0x2f87, 0x2e11, 0x2c99, 0x2b1f, 0x29a4, 0x2827, 0x26a8, + 0x2528, 0x23a7, 0x2224, 0x209f, 0x1f1a, 0x1d93, 0x1c0c, 0x1a83, + 0x18f9, 0x176e, 0x15e2, 0x1455, 0x12c8, 0x113a, 0x0fab, 0x0e1c, + 0x0c8c, 0x0afb, 0x096b, 0x07d9, 0x0648, 0x04b6, 0x0324, 0x0192, + 0x0000, 0x0000, +}; + +#define CSHIFT (FRAC_BITS - COS_TABLE_BITS - 2) + +static int int_cos(int a) +{ + int neg, v, f; + const unsigned short *p; + + a = a & (FRAC_ONE - 1); /* modulo 2 * pi */ + if (a >= (FRAC_ONE / 2)) + a = FRAC_ONE - a; + neg = 0; + if (a > (FRAC_ONE / 4)) { + neg = -1; + a = (FRAC_ONE / 2) - a; + } + p = cos_table + (a >> CSHIFT); + /* linear interpolation */ + f = a & ((1 << CSHIFT) - 1); + v = p[0] + (((p[1] - p[0]) * f + (1 << (CSHIFT - 1))) >> CSHIFT); + v = (v ^ neg) - neg; + v = v << (FRAC_BITS - 15); + return v; +} + +FILE *outfile; + +void put_sample(int v) +{ + fputc(v & 0xff, outfile); + fputc((v >> 8) & 0xff, outfile); +} + +int main(int argc, char **argv) +{ + int i, a, v, j, f, amp, ampa; + unsigned int seed = 1; + int tabf1[NB_CHANNELS], tabf2[NB_CHANNELS]; + int taba[NB_CHANNELS]; + + if (argc != 2) { + printf("usage: %s file\n" + "generate a test raw 16 bit stereo audio stream\n", argv[0]); + exit(1); + } + + outfile = fopen(argv[1], "w"); + if (!outfile) { + perror(argv[1]); + return 1; + } + + /* 1 second of single freq sinus at 1000 Hz */ + a = 0; + for(i=0;i<1 * FE;i++) { + v = (int_cos(a) * 10000) >> FRAC_BITS; + for(j=0;j> FRAC_BITS; + for(j=0;j> FRAC_BITS; + put_sample(v); + f = tabf1[j] + (((tabf2[j] - tabf1[j]) * i) / FE); + taba[j] += (f * FRAC_ONE) / FE; + } + } + + /* stereo 500 Hz with varying volume */ + a = 0; + ampa = 0; + for(i=0;i<2 * FE;i++) { + for(j=0;j> FRAC_BITS; + if (j & 1) + amp = 10000 - amp; + v = (int_cos(a) * amp) >> FRAC_BITS; + put_sample(v); + a += (500 * FRAC_ONE) / FE; + ampa += (2 * FRAC_ONE) / FE; + } + } + + fclose(outfile); + return 0; +} -- cgit v1.2.3