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remove example files

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xufulong 3 years ago
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  1. 167
      app/src/main/cpp/sox/example1.c
  2. 118
      app/src/main/cpp/sox/example2.c
  3. 98
      app/src/main/cpp/sox/example4.c
  4. 83
      app/src/main/cpp/sox/example5.c

167
app/src/main/cpp/sox/example1.c
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/* Simple example of using SoX libraries
*
* Copyright (c) 2007-8 robs@users.sourceforge.net
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* This program 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 General
* Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifdef NDEBUG /* N.B. assert used with active statements so enable always. */
#undef NDEBUG /* Must undef above assert.h or other that might include it. */
#endif
#include "sox.h"
#include <stdlib.h>
#include <stdio.h>
#include <assert.h>
static sox_format_t * in, * out; /* input and output files */
/* The function that will be called to input samples into the effects chain.
* In this example, we get samples to process from a SoX-openned audio file.
* In a different application, they might be generated or come from a different
* part of the application. */
static int input_drain(
sox_effect_t * effp, sox_sample_t * obuf, size_t * osamp)
{
(void)effp; /* This parameter is not needed in this example */
/* ensure that *osamp is a multiple of the number of channels. */
*osamp -= *osamp % effp->out_signal.channels;
/* Read up to *osamp samples into obuf; store the actual number read
* back to *osamp */
*osamp = sox_read(in, obuf, *osamp);
/* sox_read may return a number that is less than was requested; only if
* 0 samples is returned does it indicate that end-of-file has been reached
* or an error has occurred */
if (!*osamp && in->sox_errno)
fprintf(stderr, "%s: %s\n", in->filename, in->sox_errstr);
return *osamp? SOX_SUCCESS : SOX_EOF;
}
/* The function that will be called to output samples from the effects chain.
* In this example, we store the samples in a SoX-opened audio file.
* In a different application, they might perhaps be analysed in some way,
* or displayed as a wave-form */
static int output_flow(sox_effect_t *effp LSX_UNUSED, sox_sample_t const * ibuf,
sox_sample_t * obuf LSX_UNUSED, size_t * isamp, size_t * osamp)
{
/* Write out *isamp samples */
size_t len = sox_write(out, ibuf, *isamp);
/* len is the number of samples that were actually written out; if this is
* different to *isamp, then something has gone wrong--most often, it's
* out of disc space */
if (len != *isamp) {
fprintf(stderr, "%s: %s\n", out->filename, out->sox_errstr);
return SOX_EOF;
}
/* Outputting is the last `effect' in the effect chain so always passes
* 0 samples on to the next effect (as there isn't one!) */
*osamp = 0;
(void)effp; /* This parameter is not needed in this example */
return SOX_SUCCESS; /* All samples output successfully */
}
/* A `stub' effect handler to handle inputting samples to the effects
* chain; the only function needed for this example is `drain' */
static sox_effect_handler_t const * input_handler(void)
{
static sox_effect_handler_t handler = {
"input", NULL, SOX_EFF_MCHAN, NULL, NULL, NULL, input_drain, NULL, NULL, 0
};
return &handler;
}
/* A `stub' effect handler to handle outputting samples from the effects
* chain; the only function needed for this example is `flow' */
static sox_effect_handler_t const * output_handler(void)
{
static sox_effect_handler_t handler = {
"output", NULL, SOX_EFF_MCHAN, NULL, NULL, output_flow, NULL, NULL, NULL, 0
};
return &handler;
}
/*
* Reads input file, applies vol & flanger effects, stores in output file.
* E.g. example1 monkey.au monkey.aiff
*/
int main(int argc, char * argv[])
{
sox_effects_chain_t * chain;
sox_effect_t * e;
char * vol[] = {"3dB"};
assert(argc == 3);
/* All libSoX applications must start by initialising the SoX library */
assert(sox_init() == SOX_SUCCESS);
/* Open the input file (with default parameters) */
assert((in = sox_open_read(argv[1], NULL, NULL, NULL)));
/* Open the output file; we must specify the output signal characteristics.
* Since we are using only simple effects, they are the same as the input
* file characteristics */
assert((out = sox_open_write(argv[2], &in->signal, NULL, NULL, NULL, NULL)));
/* Create an effects chain; some effects need to know about the input
* or output file encoding so we provide that information here */
chain = sox_create_effects_chain(&in->encoding, &out->encoding);
/* The first effect in the effect chain must be something that can source
* samples; in this case, we have defined an input handler that inputs
* data from an audio file */
e = sox_create_effect(input_handler());
/* This becomes the first `effect' in the chain */
assert(sox_add_effect(chain, e, &in->signal, &in->signal) == SOX_SUCCESS);
free(e);
/* Create the `vol' effect, and initialise it with the desired parameters: */
e = sox_create_effect(sox_find_effect("vol"));
assert(sox_effect_options(e, 1, vol) == SOX_SUCCESS);
/* Add the effect to the end of the effects processing chain: */
assert(sox_add_effect(chain, e, &in->signal, &in->signal) == SOX_SUCCESS);
free(e);
/* Create the `flanger' effect, and initialise it with default parameters: */
e = sox_create_effect(sox_find_effect("flanger"));
assert(sox_effect_options(e, 0, NULL) == SOX_SUCCESS);
/* Add the effect to the end of the effects processing chain: */
assert(sox_add_effect(chain, e, &in->signal, &in->signal) == SOX_SUCCESS);
free(e);
/* The last effect in the effect chain must be something that only consumes
* samples; in this case, we have defined an output handler that outputs
* data to an audio file */
e = sox_create_effect(output_handler());
assert(sox_add_effect(chain, e, &in->signal, &in->signal) == SOX_SUCCESS);
free(e);
/* Flow samples through the effects processing chain until EOF is reached */
sox_flow_effects(chain, NULL, NULL);
/* All done; tidy up: */
sox_delete_effects_chain(chain);
sox_close(out);
sox_close(in);
sox_quit();
return 0;
}

118
app/src/main/cpp/sox/example2.c
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/* Simple example of using SoX libraries
*
* Copyright (c) 2008 robs@users.sourceforge.net
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* This program 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 General
* Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifdef NDEBUG /* N.B. assert used with active statements so enable always. */
#undef NDEBUG /* Must undef above assert.h or other that might include it. */
#endif
#include "sox.h"
#include "util.h"
#include <stdio.h>
#include <math.h>
#include <assert.h>
/*
* Reads input file and displays a few seconds of wave-form, starting from
* a given time through the audio. E.g. example2 song2.au 30.75 1
*/
int main(int argc, char * argv[])
{
sox_format_t * in;
sox_sample_t * buf;
size_t blocks, block_size;
/* Period of audio over which we will measure its volume in order to
* display the wave-form: */
static const double block_period = 0.025; /* seconds */
double start_secs = 0, period = 2;
char dummy;
uint64_t seek;
/* All libSoX applications must start by initialising the SoX library */
assert(sox_init() == SOX_SUCCESS);
assert(argc > 1);
++argv, --argc; /* Move to 1st parameter */
/* Open the input file (with default parameters) */
assert((in = sox_open_read(*argv, NULL, NULL, NULL)));
++argv, --argc; /* Move past this parameter */
if (argc) { /* If given, read the start time: */
assert(sscanf(*argv, "%lf%c", &start_secs, &dummy) == 1);
++argv, --argc; /* Move past this parameter */
}
if (argc) { /* If given, read the period of time to display: */
assert(sscanf(*argv, "%lf%c", &period, &dummy) == 1);
++argv, --argc; /* Move past this parameter */
}
/* Calculate the start position in number of samples: */
seek = start_secs * in->signal.rate * in->signal.channels + .5;
/* Make sure that this is at a `wide sample' boundary: */
seek -= seek % in->signal.channels;
/* Move the file pointer to the desired starting position */
assert(sox_seek(in, seek, SOX_SEEK_SET) == SOX_SUCCESS);
/* Convert block size (in seconds) to a number of samples: */
block_size = block_period * in->signal.rate * in->signal.channels + .5;
/* Make sure that this is at a `wide sample' boundary: */
block_size -= block_size % in->signal.channels;
/* Allocate a block of memory to store the block of audio samples: */
assert((buf = malloc(sizeof(sox_sample_t) * block_size)));
/* This example program requires that the audio has precisely 2 channels: */
assert(in->signal.channels == 2);
/* Read and process blocks of audio for the selected period or until EOF: */
for (blocks = 0; sox_read(in, buf, block_size) == block_size && blocks * block_period < period; ++blocks) {
double left = 0, right = 0;
size_t i;
static const char line[] = "===================================";
int l, r;
for (i = 0; i < block_size; ++i) {
SOX_SAMPLE_LOCALS;
/* convert the sample from SoX's internal format to a `double' for
* processing in this application: */
double sample = SOX_SAMPLE_TO_FLOAT_64BIT(buf[i],);
/* The samples for each channel are interleaved; in this example
* we allow only stereo audio, so the left channel audio can be found in
* even-numbered samples, and the right channel audio in odd-numbered
* samples: */
if (i & 1)
right = max(right, fabs(sample)); /* Find the peak volume in the block */
else
left = max(left, fabs(sample)); /* Find the peak volume in the block */
}
/* Build up the wave form by displaying the left & right channel
* volume as a line length: */
l = (1 - left) * 35 + .5;
r = (1 - right) * 35 + .5;
printf("%8.3f%36s|%s\n", start_secs + blocks * block_period, line + l, line + r);
}
/* All done; tidy up: */
free(buf);
sox_close(in);
sox_quit();
return 0;
}

98
app/src/main/cpp/sox/example4.c
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/* Simple example of using SoX libraries
*
* Copyright (c) 2009 robs@users.sourceforge.net
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* This program 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 General
* Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "sox.h"
#include <stdio.h>
/* Concatenate audio files. Note that the files must have the same number
* of channels and the same sample rate.
*
* Usage: example4 input-1 input-2 [... input-n] output
*/
#define check(x) do if (!(x)) { \
fprintf(stderr, "check failed: %s\n", #x); goto error; } while (0)
int main(int argc, char * argv[])
{
sox_format_t * output = NULL;
int i;
check(argc >= 1 + 2 + 1); /* Need at least 2 input files + 1 output file. */
check(sox_init() == SOX_SUCCESS);
/* Defer openning the output file as we want to set its characteristics
* based on those of the input files. */
for (i = 1; i < argc - 1; ++i) { /* For each input file... */
sox_format_t * input;
static sox_signalinfo_t signal; /* static quashes `uninitialised' warning.*/
/* The (maximum) number of samples that we shall read/write at a time;
* chosen as a rough match to typical operating system I/O buffer size: */
#define MAX_SAMPLES (size_t)2048
sox_sample_t samples[MAX_SAMPLES]; /* Temporary store whilst copying. */
size_t number_read;
/* Open this input file: */
check(input = sox_open_read(argv[i], NULL, NULL, NULL));
if (i == 1) { /* If this is the first input file... */
/* Open the output file using the same signal and encoding character-
* istics as the first input file. Note that here, input->signal.length
* will not be equal to the output file length so we are relying on
* libSoX to set the output length correctly (i.e. non-seekable output
* is not catered for); an alternative would be to first calculate the
* output length by summing the lengths of the input files and modifying
* the second parameter to sox_open_write accordingly. */
check(output = sox_open_write(argv[argc - 1],
&input->signal, &input->encoding, NULL, NULL, NULL));
/* Also, we'll store the signal characteristics of the first file
* so that we can check that these match those of the other inputs: */
signal = input->signal;
}
else { /* Second or subsequent input file... */
/* Check that this input file's signal matches that of the first file: */
check(input->signal.channels == signal.channels);
check(input->signal.rate == signal.rate);
}
/* Copy all of the audio from this input file to the output file: */
while ((number_read = sox_read(input, samples, MAX_SAMPLES)))
check(sox_write(output, samples, number_read) == number_read);
check(sox_close(input) == SOX_SUCCESS); /* Finished with this input file.*/
}
check(sox_close(output) == SOX_SUCCESS); /* Finished with the output file. */
output = NULL;
check(sox_quit() == SOX_SUCCESS);
return 0;
error: /* Truncate output file on error: */
if (output) {
FILE * f;
sox_close(output);
if ((f = fopen(argv[argc - 1], "w"))) fclose(f);
}
return 1;
}

83
app/src/main/cpp/sox/example5.c
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/* Simple example of using SoX libraries
*
* Copyright (c) 2009 robs@users.sourceforge.net
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* This program 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 General
* Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifdef NDEBUG /* N.B. assert used with active statements so enable always. */
#undef NDEBUG /* Must undef above assert.h or other that might include it. */
#endif
#include "sox.h"
#include "util.h"
#include <stdio.h>
#include <assert.h>
/* Example of reading and writing audio files stored in memory buffers
* rather than actual files.
*
* Usage: example5 input output
*/
/* Uncomment following line for fixed instead of malloc'd buffer: */
/*#define FIXED_BUFFER */
#if defined FIXED_BUFFER
#define buffer_size 123456
static char buffer[buffer_size];
#endif
int main(int argc, char * argv[])
{
static sox_format_t * in, * out; /* input and output files */
#define MAX_SAMPLES (size_t)2048
sox_sample_t samples[MAX_SAMPLES]; /* Temporary store whilst copying. */
#if !defined FIXED_BUFFER
char * buffer;
size_t buffer_size;
#endif
size_t number_read;
assert(argc == 3);
/* All libSoX applications must start by initialising the SoX library */
assert(sox_init() == SOX_SUCCESS);
/* Open the input file (with default parameters) */
assert((in = sox_open_read(argv[1], NULL, NULL, NULL)));
#if defined FIXED_BUFFER
assert((out = sox_open_mem_write(buffer, buffer_size, &in->signal, NULL, "sox", NULL)));
#else
assert((out = sox_open_memstream_write(&buffer, &buffer_size, &in->signal, NULL, "sox", NULL)));
#endif
while ((number_read = sox_read(in, samples, MAX_SAMPLES)))
assert(sox_write(out, samples, number_read) == number_read);
sox_close(out);
sox_close(in);
assert((in = sox_open_mem_read(buffer, buffer_size, NULL, NULL, NULL)));
assert((out = sox_open_write(argv[2], &in->signal, NULL, NULL, NULL, NULL)));
while ((number_read = sox_read(in, samples, MAX_SAMPLES)))
assert(sox_write(out, samples, number_read) == number_read);
sox_close(out);
sox_close(in);
#if !defined FIXED_BUFFER
free(buffer);
#endif
sox_quit();
return 0;
}
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