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author | Justin Ruggles <justin.ruggles@gmail.com> | 2010-09-15 21:36:04 +0000 |
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committer | Justin Ruggles <justin.ruggles@gmail.com> | 2010-09-15 21:36:04 +0000 |
commit | 6c834328b9bbf051473473f05f97dd2183fd336d (patch) | |
tree | ae33a66fc89e9a3ff94b1965e0d9d5dd90034313 /tests/audiogen.c | |
parent | 160918d588692d250011a9ccfe025b647167a834 (diff) | |
download | ffmpeg-6c834328b9bbf051473473f05f97dd2183fd336d.tar.gz |
Allow audiogen to take commandline parameters for sample rate and number of
channels.
Originally committed as revision 25127 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'tests/audiogen.c')
-rw-r--r-- | tests/audiogen.c | 78 |
1 files changed, 48 insertions, 30 deletions
diff --git a/tests/audiogen.c b/tests/audiogen.c index 38ca5dd22a..852e04268b 100644 --- a/tests/audiogen.c +++ b/tests/audiogen.c @@ -24,8 +24,7 @@ #include <stdlib.h> #include <stdio.h> -#define NB_CHANNELS 2 -#define FE 44100 +#define MAX_CHANNELS 8 static unsigned int myrnd(unsigned int *seed_ptr, int n) { @@ -104,15 +103,34 @@ 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; + + if (argc < 2 || argc > 4) { + printf("usage: %s file [<sample rate> [<channels>]]\n" + "generate a test raw 16 bit audio stream\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; + } + } + outfile = fopen(argv[1], "wb"); if (!outfile) { perror(argv[1]); @@ -121,64 +139,64 @@ int main(int argc, char **argv) /* 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<NB_CHANNELS;j++) + for(j=0;j<nb_channels;j++) put_sample(v); - a += (1000 * FRAC_ONE) / FE; + a += (1000 * FRAC_ONE) / sample_rate; } /* 1 second of varing frequency between 100 and 10000 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<NB_CHANNELS;j++) + for(j=0;j<nb_channels;j++) put_sample(v); - f = 100 + (((10000 - 100) * i) / FE); - a += (f * FRAC_ONE) / FE; + f = 100 + (((10000 - 100) * i) / sample_rate); + a += (f * FRAC_ONE) / sample_rate; } /* 0.5 second of low amplitude white noise */ - for(i=0;i<FE / 2;i++) { + for(i=0;i<sample_rate / 2;i++) { v = myrnd(&seed, 20000) - 10000; - for(j=0;j<NB_CHANNELS;j++) + for(j=0;j<nb_channels;j++) put_sample(v); } /* 0.5 second of high amplitude white noise */ - for(i=0;i<FE / 2;i++) { + for(i=0;i<sample_rate / 2;i++) { v = myrnd(&seed, 65535) - 32768; - for(j=0;j<NB_CHANNELS;j++) + for(j=0;j<nb_channels;j++) put_sample(v); } - /* stereo : 2 unrelated ramps */ - for(j=0;j<NB_CHANNELS;j++) { + /* 1 second of unrelated ramps for each channel */ + for(j=0;j<nb_channels;j++) { taba[j] = 0; tabf1[j] = 100 + myrnd(&seed, 5000); tabf2[j] = 100 + myrnd(&seed, 5000); } - for(i=0;i<1 * FE;i++) { - for(j=0;j<NB_CHANNELS;j++) { + for(i=0;i<1 * sample_rate;i++) { + for(j=0;j<nb_channels;j++) { v = (int_cos(taba[j]) * 10000) >> FRAC_BITS; put_sample(v); - f = tabf1[j] + (((tabf2[j] - tabf1[j]) * i) / FE); - taba[j] += (f * FRAC_ONE) / FE; + f = tabf1[j] + (((tabf2[j] - tabf1[j]) * i) / sample_rate); + taba[j] += (f * FRAC_ONE) / sample_rate; } } - /* stereo 500 Hz with varying volume */ + /* 2 seconds of 500 Hz with varying volume */ a = 0; ampa = 0; - for(i=0;i<2 * FE;i++) { - for(j=0;j<NB_CHANNELS;j++) { + for(i=0;i<2 * sample_rate;i++) { + for(j=0;j<nb_channels;j++) { amp = ((FRAC_ONE + int_cos(ampa)) * 5000) >> 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; + a += (500 * FRAC_ONE) / sample_rate; + ampa += (2 * FRAC_ONE) / sample_rate; } } |