X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=tests%2Faudiogen.c;h=4fa465638a0f76ff5a28b803e908983d7eaf5363;hb=4d3b144c5ea824193019019d33740a1ae9e0bb69;hp=68ae135869e13253af9508de6f4ae79e7c441f25;hpb=eebfba2e24bee9c0efb839b7551bf9b6b96bd717;p=ffmpeg diff --git a/tests/audiogen.c b/tests/audiogen.c index 68ae135869e..4fa465638a0 100644 --- a/tests/audiogen.c +++ b/tests/audiogen.c @@ -1,31 +1,32 @@ /* - * Generates a synthetic stereo sound - * NOTE: no floats are used to guaranty a bit exact output. + * Generate a synthetic stereo sound. + * NOTE: No floats are used to guarantee bitexact output. * * Copyright (c) 2002 Fabrice Bellard * - * This file is part of FFmpeg. + * This file is part of Libav. * - * FFmpeg is free software; you can redistribute it and/or + * Libav is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * - * FFmpeg is distributed in the hope that it will be useful, + * Libav is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public - * License along with FFmpeg; if not, write to the Free Software + * License along with Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include +#include #include +#include -#define NB_CHANNELS 2 -#define FE 44100 +#define MAX_CHANNELS 8 static unsigned int myrnd(unsigned int *seed_ptr, int n) { @@ -49,23 +50,23 @@ static unsigned int myrnd(unsigned int *seed_ptr, int n) /* 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, + 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) @@ -81,7 +82,7 @@ static int int_cos(int a) neg = 0; if (a > (FRAC_ONE / 4)) { neg = -1; - a = (FRAC_ONE / 2) - a; + a = (FRAC_ONE / 2) - a; } p = cos_table + (a >> CSHIFT); /* linear interpolation */ @@ -94,91 +95,151 @@ static int int_cos(int a) FILE *outfile; -void put_sample(int v) +static void put16(int16_t v) { - fputc(v & 0xff, outfile); + fputc( v & 0xff, outfile); fputc((v >> 8) & 0xff, outfile); } +static void put32(uint32_t v) +{ + fputc( v & 0xff, outfile); + fputc((v >> 8) & 0xff, outfile); + fputc((v >> 16) & 0xff, outfile); + fputc((v >> 24) & 0xff, outfile); +} + +#define HEADER_SIZE 46 +#define FMT_SIZE 18 +#define SAMPLE_SIZE 2 +#define WFORMAT_PCM 0x0001 + +static void put_wav_header(int sample_rate, int channels, int nb_samples) +{ + int block_align = SAMPLE_SIZE * channels; + int data_size = block_align * nb_samples; + + fputs("RIFF", outfile); + put32(HEADER_SIZE + data_size); + fputs("WAVEfmt ", outfile); + put32(FMT_SIZE); + put16(WFORMAT_PCM); + put16(channels); + put32(sample_rate); + put32(block_align * sample_rate); + put16(block_align); + put16(SAMPLE_SIZE * 8); + put16(0); + fputs("data", outfile); + put32(data_size); +} + 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]); + int tabf1[MAX_CHANNELS], tabf2[MAX_CHANNELS]; + int taba[MAX_CHANNELS]; + int sample_rate = 44100; + int nb_channels = 2; + char *ext; + + if (argc < 2 || argc > 5) { + printf("usage: %s file [ [] []]\n" + "generate a test raw 16 bit audio stream\n" + "If the file extension is .wav a WAVE header will be added.\n" + "default: 44100 Hz stereo\n", argv[0]); exit(1); } + if (argc > 2) { + sample_rate = atoi(argv[2]); + if (sample_rate <= 0) { + fprintf(stderr, "invalid sample rate: %d\n", sample_rate); + return 1; + } + } + + if (argc > 3) { + nb_channels = atoi(argv[3]); + if (nb_channels < 1 || nb_channels > MAX_CHANNELS) { + fprintf(stderr, "invalid number of channels: %d\n", nb_channels); + return 1; + } + } + + if (argc > 4) + seed = atoi(argv[4]); + outfile = fopen(argv[1], "wb"); if (!outfile) { perror(argv[1]); return 1; } + if ((ext = strrchr(argv[1], '.')) != NULL && !strcmp(ext, ".wav")) + put_wav_header(sample_rate, nb_channels, 6 * sample_rate); + /* 1 second of single freq sinus at 1000 Hz */ a = 0; - for(i=0;i<1 * FE;i++) { + for (i = 0; i < 1 * sample_rate; 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; + put16(v); + f = tabf1[j] + (((tabf2[j] - tabf1[j]) * i) / sample_rate); + taba[j] += (f * FRAC_ONE) / sample_rate; } } - /* stereo 500 Hz with varying volume */ - a = 0; + /* 2 seconds of 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; + put16(v); + a += (500 * FRAC_ONE) / sample_rate; + ampa += (2 * FRAC_ONE) / sample_rate; } }