如何使用 QByteArray 而不是 SNDFILE

我想使用"fvad"库来检测音频静音部分，但我有QByteArray而不是SNDFILE。我该怎么做？

sf_read_double(infile, buf0, framelen)

[https://github.com/dpirch/libfvad/blob/master/examples/fvadwav.c][1]

这是我的代码：/* * 版权所有 (c( 2016 丹尼尔·皮奇 * * 此源代码的使用受 BSD 样式许可证的约束 * 可以在源目录的许可证文件中找到 *树。可以找到额外的知识产权授予 * 在文件中 专利. 所有贡献项目作者可以 * 在源树根目录的 AUTHORS 文件中找到。 */

#define _POSIX_C_SOURCE 200809L
#include <fvad.h>
#include <stdlib.h>
#include <stdbool.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <sndfile.h>
static bool process_sf(SNDFILE *infile, Fvad *vad,
size_t framelen, SNDFILE *outfiles[2], FILE *listfile)
{
bool success = false;
double *buf0 = NULL;
int16_t *buf1 = NULL;
int vadres, prev = -1;
long frames[2] = {0, 0};
long segments[2] = {0, 0};
if (framelen > SIZE_MAX / sizeof (double)
|| !(buf0 = malloc(framelen * sizeof *buf0))
|| !(buf1 = malloc(framelen * sizeof *buf1))) {
fprintf(stderr, "failed to allocate buffersn");
goto end;
}
while (sf_read_double(infile, buf0, framelen) == (sf_count_t)framelen) {
// Convert the read samples to int16
for (size_t i = 0; i < framelen; i++)
buf1[i] = buf0[i] * INT16_MAX;
vadres = fvad_process(vad, buf1, framelen);
if (vadres < 0) {
fprintf(stderr, "VAD processing failedn");
goto end;
}
if (listfile) {
fprintf(listfile, "%dn", vadres);
}
vadres = !!vadres; // make sure it is 0 or 1
if (outfiles[vadres]) {
sf_write_double(outfiles[!!vadres], buf0, framelen);
}
frames[vadres]++;
if (prev != vadres) segments[vadres]++;
prev = vadres;
}
printf("voice detected in %ld of %ld frames (%.2f%%)n",
frames[1], frames[0] + frames[1],
frames[0] + frames[1] ?
100.0 * ((double)frames[1] / (frames[0] + frames[1])) : 0.0);
printf("%ld voice segments, average length %.2f framesn",
segments[1], segments[1] ? (double)frames[1] / segments[1] : 0.0);
printf("%ld non-voice segments, average length %.2f framesn",
segments[0], segments[0] ? (double)frames[0] / segments[0] : 0.0);
success = true;
end:
if (buf0) free(buf0);
if (buf1) free(buf1);
return success;
}


static bool parse_int(int *dest, const char *s, int min, int max)
{
char *endp;
long val;
errno = 0;
val = strtol(s, &endp, 10);
if (!errno && !*endp && val >= min && val <= max) {
*dest = val;
return true;
} else {
return false;
}
}

int main(int argc, char *argv[])
{
int retval;
const char *in_fname, *out_fname[2] = {NULL, NULL}, *list_fname = NULL;
SNDFILE *in_sf = NULL, *out_sf[2] = {NULL, NULL};
SF_INFO in_info = {0}, out_info[2];
FILE *list_file = NULL;
int mode, frame_ms = 10;
Fvad *vad = NULL;
/*
* create fvad instance
*/
vad = fvad_new();
if (!vad) {
fprintf(stderr, "out of memoryn");
goto fail;
}
/*
* parse arguments
*/
for (int ch; (ch = getopt(argc, argv, "m:f:o:n:l:h")) != -1;) {
switch (ch) {
case 'm':
if (!parse_int(&mode, optarg, 0, 3) || fvad_set_mode(vad, mode) < 0) {
fprintf(stderr, "invalid mode '%s'n", optarg);
goto argfail;
}
break;
case 'f':
if (!parse_int(&frame_ms, optarg, 10, 30) || frame_ms % 10 != 0) {
fprintf(stderr, "invalid frame length '%s'n", optarg);
goto argfail;
}
break;
case 'o':
out_fname[1] = optarg;
break;
case 'n':
out_fname[0] = optarg;
break;
case 'l':
list_fname = optarg;
break;
case 'h':
printf(
"Usage: %s [OPTION]... FILEn"
"Reads FILE in wav format and performs voice activity detection (VAD).n"
"Options:n"
"  -m MODE      set VAD operating mode (aggressiveness) (0-3, default 0)n"
"  -f DURATION  set frame length in ms (10, 20, 30; default 10)n"
"  -o FILE      write detected voice frames to FILE in wav formatn"
"  -n FILE      write detected non-voice frames to FILE in wav formatn"
"  -l FILE      write list of per-frame detection results to FILEn"
"  -h           display this help and exitn",
argv[0]);
goto success;
default: goto argfail;
}
}
if (optind >= argc) {
fprintf(stderr, "input file expectedn");
goto argfail;
}
in_fname = argv[optind++];
if (optind < argc) {
fprintf(stderr, "unexpected argument '%s'; only one input file expectedn", argv[optind]);
goto argfail;
}
/*
* open and check input file
*/
in_sf = sf_open(in_fname, SFM_READ, &in_info);
if (!in_sf) {
fprintf(stderr, "Cannot open input file '%s': %sn", in_fname, sf_strerror(NULL));
goto fail;
}
if (in_info.channels != 1) {
fprintf(stderr, "only single-channel wav files supported; input file has %d channelsn", in_info.channels);
goto fail;
}
if (fvad_set_sample_rate(vad, in_info.samplerate) < 0) {
fprintf(stderr, "invalid sample rate: %d Hzn", in_info.samplerate);
goto fail;
}
/*
* open required output files
*/
for (int i = 0; i < 2; i++) {
if (out_fname[i]) {
out_info[i] = (SF_INFO){
.samplerate = in_info.samplerate,
.channels = 1,
.format = SF_FORMAT_WAV | SF_FORMAT_PCM_16
};
out_sf[i] = sf_open(out_fname[i], SFM_WRITE, &out_info[i]);
if (!out_sf[i]) {
fprintf(stderr, "Cannot open output file '%s': %sn", out_fname[i], sf_strerror(NULL));
goto fail;
}
}
}
if (list_fname) {
list_file = fopen(list_fname, "w");
if (!list_file) {
fprintf(stderr, "Cannot open output file '%s': %sn", list_fname, strerror(errno));
goto fail;
}
}
/*
* run main loop
*/
if (!process_sf(in_sf, vad,
(size_t)in_info.samplerate / 1000 * frame_ms, out_sf, list_file))
goto fail;
/*
* cleanup
*/
success:
retval = EXIT_SUCCESS;
goto end;
argfail:
fprintf(stderr, "Try '%s -h' for more information.n", argv[0]);
fail:
retval = EXIT_FAILURE;
goto end;
end:
if (in_sf) sf_close(in_sf);
for (int i = 0; i < 2; i++)
if (out_sf[i]) sf_close(out_sf[i]);
if (list_file) fclose(list_file);
if (vad) fvad_free(vad);
return retval;
}