정규 화 혼 음 알고리즘 과 alsa 혼 음 알고리즘 비교
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#define IN_FILE1 "1.wav"
#define IN_FILE2 "2.wav"
#define OUT_FILE "remix.pcm"
#define SIZE_AUDIO_FRAME (2)
void Mix(char sourseFile[10][SIZE_AUDIO_FRAME],int number,char *objectFile)
{
//
int const MAX=32767;
int const MIN=-32768;
double f=1;
int output;
int i = 0,j = 0;
for (i=0;i<SIZE_AUDIO_FRAME/2;i++)
{
int temp=0;
for (j=0;j<number;j++)
{
temp+=*(short*)(sourseFile[j]+i*2);
}
output=(int)(temp*f);
if (output>MAX)
{
f=(double)MAX/(double)(output);
output=MAX;
}
if (output<MIN)
{
f=(double)MIN/(double)(output);
output=MIN;
}
if (f<1)
{
f+=((double)1-f)/(double)32;
}
*(short*)(objectFile+i*2)=(short)output;
}
}
#define ARCH_ADD(p,a) ((p) += (a))
void alsa_mix_16(short data1,short data2,short *date_mix)
{
int sample, old_sample,sum;
sample = data1;
old_sample = data2;
sum = data2;
if(*date_mix == 0)
sample -= old_sample;
ARCH_ADD(sum,sample);
do{
old_sample = sum;
if(old_sample > 0x7fff)
sample = 0x7fff;
else if(old_sample < -0x8000)
sample = -0x8000;
else
sample = old_sample;
*date_mix = sample;
}while(0);
}
int main()
{
FILE * fp1,*fp2,*fpm;
fp1 = fopen(IN_FILE1,"rb");
fp2 = fopen(IN_FILE2,"rb");
fpm = fopen(OUT_FILE,"wb");
short data1,data2,date_mix = 0;
int ret1,ret2;
char sourseFile[10][2];
while(1)
{
ret1 = fread(&data1,2,1,fp1);
ret2 = fread(&data2,2,1,fp2);
*(short*) sourseFile[0] = data1;
*(short*) sourseFile[1] = data2;
if(ret1>0 && ret2>0)
{
// Mix(sourseFile,2,(char *)&date_mix);
alsa_mix_16(data1,data2,&date_mix);
/*
if( data1 < 0 && data2 < 0)
date_mix = data1+data2 - (data1 * data2 / -(pow(2,16-1)-1));
else
date_mix = data1+data2 - (data1 * data2 / (pow(2,16-1)-1));*/
if(date_mix > pow(2,16-1) || date_mix < -pow(2,16-1))
printf("mix error
");
}
else if( (ret1 > 0) && (ret2==0))
{
date_mix = data1;
}
else if( (ret2 > 0) && (ret1==0))
{
date_mix = data2;
}
else if( (ret1 == 0) && (ret2 == 0))
{
break;
}
fwrite(&date_mix,2,1,fpm);
}
fclose(fp1);
fclose(fp2);
fclose(fpm);
printf("Done!
");
}
89 줄 은 귀 일화 혼 음 알고리즘 이 고 90 은 alsa 혼 음 알고리즘 으로 마지막 에 remix. pcm 데이터 가 발생 한다
다음은 aplay. c 에서 고 친 재생 프로그램 입 니 다. alsa - util - 에서 컴 파일 해 야 합 니 다.
/*
* aplay.c - plays and records
*
* CREATIVE LABS CHANNEL-files
* Microsoft WAVE-files
* SPARC AUDIO .AU-files
* Raw Data
*
* Copyright (c) by Jaroslav Kysela <[email protected]>
* Based on vplay program by Michael Beck
*
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#define _GNU_SOURCE
#include <stdio.h>
#include <malloc.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <getopt.h>
#include <fcntl.h>
#include <ctype.h>
#include <errno.h>
#include <limits.h>
#include <time.h>
#include <locale.h>
#include <alsa/asoundlib.h>
#include <assert.h>
#include <termios.h>
#include <sys/poll.h>
#include <sys/uio.h>
#include <sys/time.h>
#include <sys/signal.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <endian.h>
#include "aconfig.h"
#include "gettext.h"
#include "formats.h"
#include "version.h"
#ifndef LLONG_MAX
#define LLONG_MAX 9223372036854775807LL
#endif
#ifndef le16toh
#include <asm/byteorder.h>
#define le16toh(x) __le16_to_cpu(x)
#define be16toh(x) __be16_to_cpu(x)
#define le32toh(x) __le32_to_cpu(x)
#define be32toh(x) __be32_to_cpu(x)
#endif
#define DEFAULT_FORMAT SND_PCM_FORMAT_U8
#define DEFAULT_SPEED 8000
#define FORMAT_DEFAULT -1
#define FORMAT_RAW 0
#define FORMAT_VOC 1
#define FORMAT_WAVE 2
#define FORMAT_AU 3
/* global data */
static snd_pcm_sframes_t (*readi_func)(snd_pcm_t *handle, void *buffer, snd_pcm_uframes_t size);
static snd_pcm_sframes_t (*writei_func)(snd_pcm_t *handle, const void *buffer, snd_pcm_uframes_t size);
static snd_pcm_sframes_t (*readn_func)(snd_pcm_t *handle, void **bufs, snd_pcm_uframes_t size);
static snd_pcm_sframes_t (*writen_func)(snd_pcm_t *handle, void **bufs, snd_pcm_uframes_t size);
enum {
VUMETER_NONE,
VUMETER_MONO,
VUMETER_STEREO
};
static char *command;
static snd_pcm_t *handle;
static struct {
snd_pcm_format_t format;
unsigned int channels;
unsigned int rate;
} hwparams, rhwparams;
static int timelimit = 0;
static int quiet_mode = 0;
static int file_type = FORMAT_DEFAULT;
static int open_mode = 0;
static snd_pcm_stream_t stream = SND_PCM_STREAM_PLAYBACK;
static int mmap_flag = 0;
static int interleaved = 1;
static int nonblock = 0;
static u_char *audiobuf = NULL;
static snd_pcm_uframes_t chunk_size = 0;
static unsigned period_time = 0;
static unsigned buffer_time = 0;
static snd_pcm_uframes_t period_frames = 0;
static snd_pcm_uframes_t buffer_frames = 0;
static int avail_min = -1;
static int start_delay = 0;
static int stop_delay = 0;
static int monotonic = 0;
static int interactive = 0;
static int can_pause = 0;
static int verbose = 0;
static int vumeter = VUMETER_NONE;
static int buffer_pos = 0;
static size_t bits_per_sample, bits_per_frame;
static size_t chunk_bytes;
static int test_position = 0;
static int test_coef = 8;
static int test_nowait = 0;
static snd_output_t *log;
static long long max_file_size = 0;
static int max_file_time = 0;
static int use_strftime = 0;
volatile static int recycle_capture_file = 0;
static long term_c_lflag = -1;
static int fd = -1;
static int fd_t = -1;
static off64_t pbrec_count = LLONG_MAX, fdcount;
static int vocmajor, vocminor;
static char *pidfile_name = NULL;
FILE *pidf = NULL;
static int pidfile_written = 0;
/* needed prototypes */
static void done_stdin(void);
static void playback(char *filename);
static void capture(char *filename);
static void playbackv(char **filenames, unsigned int count);
static void capturev(char **filenames, unsigned int count);
static void begin_voc(int fd, size_t count);
static void end_voc(int fd);
static void begin_wave(int fd, size_t count);
static void end_wave(int fd);
static void begin_au(int fd, size_t count);
static void end_au(int fd);
static const struct fmt_capture {
void (*start) (int fd, size_t count);
void (*end) (int fd);
char *what;
long long max_filesize;
} fmt_rec_table[] = {
{ NULL, NULL, N_("raw data"), LLONG_MAX },
{ begin_voc, end_voc, N_("VOC"), 16000000LL },
/* FIXME: can WAV handle exactly 2GB or less than it? */
{ begin_wave, end_wave, N_("WAVE"), 2147483648LL },
{ begin_au, end_au, N_("Sparc Audio"), LLONG_MAX }
};
#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 95)
#define error(...) do {\
fprintf(stderr, "%s: %s:%d: ", command, __FUNCTION__, __LINE__); \
fprintf(stderr, __VA_ARGS__); \
putc('
', stderr); \
} while (0)
#else
#define error(args...) do {\
fprintf(stderr, "%s: %s:%d: ", command, __FUNCTION__, __LINE__); \
fprintf(stderr, ##args); \
putc('
', stderr); \
} while (0)
#endif
static void usage(char *command)
{
snd_pcm_format_t k;
printf(
_("Usage: %s [OPTION]... [FILE]...
"
"
"
"-h, --help help
"
" --version print current version
"
"-l, --list-devices list all soundcards and digital audio devices
"
"-L, --list-pcms list device names
"
"-D, --device=NAME select PCM by name
"
"-q, --quiet quiet mode
"
"-t, --file-type TYPE file type (voc, wav, raw or au)
"
"-c, --channels=# channels
"
"-f, --format=FORMAT sample format (case insensitive)
"
"-r, --rate=# sample rate
"
"-d, --duration=# interrupt after # seconds
"
"-M, --mmap mmap stream
"
"-N, --nonblock nonblocking mode
"
"-F, --period-time=# distance between interrupts is # microseconds
"
"-B, --buffer-time=# buffer duration is # microseconds
"
" --period-size=# distance between interrupts is # frames
"
" --buffer-size=# buffer duration is # frames
"
"-A, --avail-min=# min available space for wakeup is # microseconds
"
"-R, --start-delay=# delay for automatic PCM start is # microseconds
"
" (relative to buffer size if <= 0)
"
"-T, --stop-delay=# delay for automatic PCM stop is # microseconds from xrun
"
"-v, --verbose show PCM structure and setup (accumulative)
"
"-V, --vumeter=TYPE enable VU meter (TYPE: mono or stereo)
"
"-I, --separate-channels one file for each channel
"
"-i, --interactive allow interactive operation from stdin
"
" --disable-resample disable automatic rate resample
"
" --disable-channels disable automatic channel conversions
"
" --disable-format disable automatic format conversions
"
" --disable-softvol disable software volume control (softvol)
"
" --test-position test ring buffer position
"
" --test-coef=# test coefficient for ring buffer position (default 8)
"
" expression for validation is: coef * (buffer_size / 2)
"
" --test-nowait do not wait for ring buffer - eats whole CPU
"
" --max-file-time=# start another output file when the old file has recorded
"
" for this many seconds
"
" --process-id-file write the process ID here
"
" --use-strftime apply the strftime facility to the output file name
")
, command);
printf(_("Recognized sample formats are:"));
for (k = 0; k < SND_PCM_FORMAT_LAST; ++k) {
const char *s = snd_pcm_format_name(k);
if (s)
printf(" %s", s);
}
printf(_("
Some of these may not be available on selected hardware
"));
printf(_("The availabled format shortcuts are:
"));
printf(_("-f cd (16 bit little endian, 44100, stereo)
"));
printf(_("-f cdr (16 bit big endian, 44100, stereo)
"));
printf(_("-f dat (16 bit little endian, 48000, stereo)
"));
}
static void device_list(void)
{
snd_ctl_t *handle;
int card, err, dev, idx;
snd_ctl_card_info_t *info;
snd_pcm_info_t *pcminfo;
snd_ctl_card_info_alloca(&info);
snd_pcm_info_alloca(&pcminfo);
card = -1;
if (snd_card_next(&card) < 0 || card < 0) {
error(_("no soundcards found..."));
return;
}
printf(_("**** List of %s Hardware Devices ****
"),
snd_pcm_stream_name(stream));
while (card >= 0) {
char name[32];
sprintf(name, "hw:%d", card);
if ((err = snd_ctl_open(&handle, name, 0)) < 0) {
error("control open (%i): %s", card, snd_strerror(err));
goto next_card;
}
if ((err = snd_ctl_card_info(handle, info)) < 0) {
error("control hardware info (%i): %s", card, snd_strerror(err));
snd_ctl_close(handle);
goto next_card;
}
dev = -1;
while (1) {
unsigned int count;
if (snd_ctl_pcm_next_device(handle, &dev)<0)
error("snd_ctl_pcm_next_device");
if (dev < 0)
break;
snd_pcm_info_set_device(pcminfo, dev);
snd_pcm_info_set_subdevice(pcminfo, 0);
snd_pcm_info_set_stream(pcminfo, stream);
if ((err = snd_ctl_pcm_info(handle, pcminfo)) < 0) {
if (err != -ENOENT)
error("control digital audio info (%i): %s", card, snd_strerror(err));
continue;
}
printf(_("card %i: %s [%s], device %i: %s [%s]
"),
card, snd_ctl_card_info_get_id(info), snd_ctl_card_info_get_name(info),
dev,
snd_pcm_info_get_id(pcminfo),
snd_pcm_info_get_name(pcminfo));
count = snd_pcm_info_get_subdevices_count(pcminfo);
printf( _(" Subdevices: %i/%i
"),
snd_pcm_info_get_subdevices_avail(pcminfo), count);
for (idx = 0; idx < (int)count; idx++) {
snd_pcm_info_set_subdevice(pcminfo, idx);
if ((err = snd_ctl_pcm_info(handle, pcminfo)) < 0) {
error("control digital audio playback info (%i): %s", card, snd_strerror(err));
} else {
printf(_(" Subdevice #%i: %s
"),
idx, snd_pcm_info_get_subdevice_name(pcminfo));
}
}
}
snd_ctl_close(handle);
next_card:
if (snd_card_next(&card) < 0) {
error("snd_card_next");
break;
}
}
}
static void pcm_list(void)
{
void **hints, **n;
char *name, *descr, *descr1, *io;
const char *filter;
if (snd_device_name_hint(-1, "pcm", &hints) < 0)
return;
n = hints;
filter = stream == SND_PCM_STREAM_CAPTURE ? "Input" : "Output";
while (*n != NULL) {
name = snd_device_name_get_hint(*n, "NAME");
descr = snd_device_name_get_hint(*n, "DESC");
io = snd_device_name_get_hint(*n, "IOID");
if (io != NULL && strcmp(io, filter) != 0)
goto __end;
printf("%s
", name);
if ((descr1 = descr) != NULL) {
printf(" ");
while (*descr1) {
if (*descr1 == '
')
printf("
");
else
putchar(*descr1);
descr1++;
}
putchar('
');
}
__end:
if (name != NULL)
free(name);
if (descr != NULL)
free(descr);
if (io != NULL)
free(io);
n++;
}
snd_device_name_free_hint(hints);
}
static void version(void)
{
printf("%s: version " SND_UTIL_VERSION_STR " by Jaroslav Kysela <[email protected]>
", command);
}
/*
* Subroutine to clean up before exit.
*/
static void prg_exit(int code)
{
done_stdin();
if (handle)
snd_pcm_close(handle);
if (pidfile_written)
remove (pidfile_name);
exit(code);
}
static void signal_handler(int sig)
{
static int in_aborting;
if (in_aborting)
return;
in_aborting = 1;
if (verbose==2)
putchar('
');
if (!quiet_mode)
fprintf(stderr, _("Aborted by signal %s...
"), strsignal(sig));
if (stream == SND_PCM_STREAM_CAPTURE) {
if (fmt_rec_table[file_type].end) {
fmt_rec_table[file_type].end(fd);
fd = -1;
}
stream = -1;
}
if (fd > 1) {
close(fd);
fd = -1;
}
if (handle && sig != SIGABRT) {
snd_pcm_close(handle);
handle = NULL;
}
prg_exit(EXIT_FAILURE);
}
/* call on SIGUSR1 signal. */
static void signal_handler_recycle (int sig)
{
/* flag the capture loop to start a new output file */
recycle_capture_file = 1;
}
enum {
OPT_VERSION = 1,
OPT_PERIOD_SIZE,
OPT_BUFFER_SIZE,
OPT_DISABLE_RESAMPLE,
OPT_DISABLE_CHANNELS,
OPT_DISABLE_FORMAT,
OPT_DISABLE_SOFTVOL,
OPT_TEST_POSITION,
OPT_TEST_COEF,
OPT_TEST_NOWAIT,
OPT_MAX_FILE_TIME,
OPT_PROCESS_ID_FILE,
OPT_USE_STRFTIME
};
int main(int argc, char *argv[])
{
int option_index;
static const char short_options[] = "hnlLD:qt:c:f:r:d:MNF:A:R:T:B:vV:IPCi";
static const struct option long_options[] = {
{"help", 0, 0, 'h'},
{"version", 0, 0, OPT_VERSION},
{"list-devnames", 0, 0, 'n'},
{"list-devices", 0, 0, 'l'},
{"list-pcms", 0, 0, 'L'},
{"device", 1, 0, 'D'},
{"quiet", 0, 0, 'q'},
{"file-type", 1, 0, 't'},
{"channels", 1, 0, 'c'},
{"format", 1, 0, 'f'},
{"rate", 1, 0, 'r'},
{"duration", 1, 0 ,'d'},
{"mmap", 0, 0, 'M'},
{"nonblock", 0, 0, 'N'},
{"period-time", 1, 0, 'F'},
{"period-size", 1, 0, OPT_PERIOD_SIZE},
{"avail-min", 1, 0, 'A'},
{"start-delay", 1, 0, 'R'},
{"stop-delay", 1, 0, 'T'},
{"buffer-time", 1, 0, 'B'},
{"buffer-size", 1, 0, OPT_BUFFER_SIZE},
{"verbose", 0, 0, 'v'},
{"vumeter", 1, 0, 'V'},
{"separate-channels", 0, 0, 'I'},
{"playback", 0, 0, 'P'},
{"capture", 0, 0, 'C'},
{"disable-resample", 0, 0, OPT_DISABLE_RESAMPLE},
{"disable-channels", 0, 0, OPT_DISABLE_CHANNELS},
{"disable-format", 0, 0, OPT_DISABLE_FORMAT},
{"disable-softvol", 0, 0, OPT_DISABLE_SOFTVOL},
{"test-position", 0, 0, OPT_TEST_POSITION},
{"test-coef", 1, 0, OPT_TEST_COEF},
{"test-nowait", 0, 0, OPT_TEST_NOWAIT},
{"max-file-time", 1, 0, OPT_MAX_FILE_TIME},
{"process-id-file", 1, 0, OPT_PROCESS_ID_FILE},
{"use-strftime", 0, 0, OPT_USE_STRFTIME},
{"interactive", 0, 0, 'i'},
{0, 0, 0, 0}
};
char *pcm_name = "default";
int tmp, err, c;
int do_device_list = 0, do_pcm_list = 0;
snd_pcm_info_t *info;
#ifdef ENABLE_NLS
setlocale(LC_ALL, "");
textdomain(PACKAGE);
#endif
snd_pcm_info_alloca(&info);
err = snd_output_stdio_attach(&log, stderr, 0);
assert(err >= 0);
command = argv[0];
file_type = FORMAT_DEFAULT;
if (strstr(argv[0], "arecord")) {
stream = SND_PCM_STREAM_CAPTURE;
file_type = FORMAT_WAVE;
command = "arecord";
start_delay = 1;
} else if (strstr(argv[0], "aplay")) {
stream = SND_PCM_STREAM_PLAYBACK;
command = "aplay";
} else {
error(_("command should be named either arecord or aplay"));
return 1;
}
chunk_size = -1;
rhwparams.format = DEFAULT_FORMAT;
rhwparams.rate = DEFAULT_SPEED;
rhwparams.channels = 1;
while ((c = getopt_long(argc, argv, short_options, long_options, &option_index)) != -1) {
switch (c) {
case 'h':
usage(command);
return 0;
case OPT_VERSION:
version();
return 0;
case 'l':
do_device_list = 1;
break;
case 'L':
do_pcm_list = 1;
break;
case 'D':
pcm_name = optarg;
break;
case 'q':
quiet_mode = 1;
break;
case 't':
if (strcasecmp(optarg, "raw") == 0)
file_type = FORMAT_RAW;
else if (strcasecmp(optarg, "voc") == 0)
file_type = FORMAT_VOC;
else if (strcasecmp(optarg, "wav") == 0)
file_type = FORMAT_WAVE;
else if (strcasecmp(optarg, "au") == 0 || strcasecmp(optarg, "sparc") == 0)
file_type = FORMAT_AU;
else {
error(_("unrecognized file format %s"), optarg);
return 1;
}
break;
case 'c':
rhwparams.channels = strtol(optarg, NULL, 0);
if (rhwparams.channels < 1 || rhwparams.channels > 256) {
error(_("value %i for channels is invalid"), rhwparams.channels);
return 1;
}
break;
case 'f':
if (strcasecmp(optarg, "cd") == 0 || strcasecmp(optarg, "cdr") == 0) {
if (strcasecmp(optarg, "cdr") == 0)
rhwparams.format = SND_PCM_FORMAT_S16_BE;
else
rhwparams.format = file_type == FORMAT_AU ? SND_PCM_FORMAT_S16_BE : SND_PCM_FORMAT_S16_LE;
rhwparams.rate = 44100;
rhwparams.channels = 2;
} else if (strcasecmp(optarg, "dat") == 0) {
rhwparams.format = file_type == FORMAT_AU ? SND_PCM_FORMAT_S16_BE : SND_PCM_FORMAT_S16_LE;
rhwparams.rate = 48000;
rhwparams.channels = 2;
} else {
rhwparams.format = snd_pcm_format_value(optarg);
if (rhwparams.format == SND_PCM_FORMAT_UNKNOWN) {
error(_("wrong extended format '%s'"), optarg);
prg_exit(EXIT_FAILURE);
}
}
break;
case 'r':
tmp = strtol(optarg, NULL, 0);
if (tmp < 300)
tmp *= 1000;
rhwparams.rate = tmp;
if (tmp < 2000 || tmp > 192000) {
error(_("bad speed value %i"), tmp);
return 1;
}
break;
case 'd':
timelimit = strtol(optarg, NULL, 0);
break;
case 'N':
nonblock = 1;
open_mode |= SND_PCM_NONBLOCK;
break;
case 'F':
period_time = strtol(optarg, NULL, 0);
break;
case 'B':
buffer_time = strtol(optarg, NULL, 0);
break;
case OPT_PERIOD_SIZE:
period_frames = strtol(optarg, NULL, 0);
break;
case OPT_BUFFER_SIZE:
buffer_frames = strtol(optarg, NULL, 0);
break;
case 'A':
avail_min = strtol(optarg, NULL, 0);
break;
case 'R':
start_delay = strtol(optarg, NULL, 0);
break;
case 'T':
stop_delay = strtol(optarg, NULL, 0);
break;
case 'v':
verbose++;
if (verbose > 1 && !vumeter)
vumeter = VUMETER_MONO;
break;
case 'V':
if (*optarg == 's')
vumeter = VUMETER_STEREO;
else if (*optarg == 'm')
vumeter = VUMETER_MONO;
else
vumeter = VUMETER_NONE;
break;
case 'M':
mmap_flag = 1;
break;
case 'I':
interleaved = 0;
break;
case 'P':
stream = SND_PCM_STREAM_PLAYBACK;
command = "aplay";
break;
case 'C':
stream = SND_PCM_STREAM_CAPTURE;
command = "arecord";
start_delay = 1;
if (file_type == FORMAT_DEFAULT)
file_type = FORMAT_WAVE;
break;
case 'i':
interactive = 1;
break;
case OPT_DISABLE_RESAMPLE:
open_mode |= SND_PCM_NO_AUTO_RESAMPLE;
break;
case OPT_DISABLE_CHANNELS:
open_mode |= SND_PCM_NO_AUTO_CHANNELS;
break;
case OPT_DISABLE_FORMAT:
open_mode |= SND_PCM_NO_AUTO_FORMAT;
break;
case OPT_DISABLE_SOFTVOL:
open_mode |= SND_PCM_NO_SOFTVOL;
break;
case OPT_TEST_POSITION:
test_position = 1;
break;
case OPT_TEST_COEF:
test_coef = strtol(optarg, NULL, 0);
if (test_coef < 1)
test_coef = 1;
break;
case OPT_TEST_NOWAIT:
test_nowait = 1;
break;
case OPT_MAX_FILE_TIME:
max_file_time = strtol(optarg, NULL, 0);
break;
case OPT_PROCESS_ID_FILE:
pidfile_name = optarg;
break;
case OPT_USE_STRFTIME:
use_strftime = 1;
break;
default:
fprintf(stderr, _("Try `%s --help' for more information.
"), command);
return 1;
}
}
if (do_device_list) {
if (do_pcm_list) pcm_list();
device_list();
goto __end;
} else if (do_pcm_list) {
pcm_list();
goto __end;
}
err = snd_pcm_open(&handle, pcm_name, stream, open_mode);
if (err < 0) {
error(_("audio open error: %s"), snd_strerror(err));
return 1;
}
if ((err = snd_pcm_info(handle, info)) < 0) {
error(_("info error: %s"), snd_strerror(err));
return 1;
}
if (nonblock) {
err = snd_pcm_nonblock(handle, 1);
if (err < 0) {
error(_("nonblock setting error: %s"), snd_strerror(err));
return 1;
}
}
chunk_size = 1024;
hwparams = rhwparams;
audiobuf = (u_char *)malloc(1024);
if (audiobuf == NULL) {
error(_("not enough memory"));
return 1;
}
if (mmap_flag) {
writei_func = snd_pcm_mmap_writei;
readi_func = snd_pcm_mmap_readi;
writen_func = snd_pcm_mmap_writen;
readn_func = snd_pcm_mmap_readn;
} else {
writei_func = snd_pcm_writei;
readi_func = snd_pcm_readi;
writen_func = snd_pcm_writen;
readn_func = snd_pcm_readn;
}
if (pidfile_name) {
errno = 0;
pidf = fopen (pidfile_name, "w");
if (pidf) {
(void)fprintf (pidf, "%d
", getpid());
fclose(pidf);
pidfile_written = 1;
} else {
error(_("Cannot create process ID file %s: %s"),
pidfile_name, strerror (errno));
return 1;
}
}
signal(SIGINT, signal_handler);
signal(SIGTERM, signal_handler);
signal(SIGABRT, signal_handler);
signal(SIGUSR1, signal_handler_recycle);
if (interleaved) {
if (optind > argc - 1) {
if (stream == SND_PCM_STREAM_PLAYBACK)
playback(NULL);
else
capture(NULL);
} else {
while (optind <= argc - 1) {
if (stream == SND_PCM_STREAM_PLAYBACK)
playback(argv[optind++]);
else
capture(argv[optind++]);
}
}
} else {
if (stream == SND_PCM_STREAM_PLAYBACK)
playbackv(&argv[optind], argc - optind);
else
capturev(&argv[optind], argc - optind);
}
if (verbose==2)
putchar('
');
snd_pcm_close(handle);
handle = NULL;
free(audiobuf);
__end:
snd_output_close(log);
snd_config_update_free_global();
prg_exit(EXIT_SUCCESS);
/* avoid warning */
return EXIT_SUCCESS;
}
/*
* Safe read (for pipes)
*/
static ssize_t safe_read(int fd, void *buf, size_t count)
{
ssize_t result = 0, res;
while (count > 0) {
if ((res = read(fd, buf, count)) == 0)
break;
if (res < 0)
return result > 0 ? result : res;
count -= res;
result += res;
buf = (char *)buf + res;
}
return result;
}
/*
* Test, if it is a .VOC file and return >=0 if ok (this is the length of rest)
* < 0 if not
*/
static int test_vocfile(void *buffer)
{
VocHeader *vp = buffer;
if (!memcmp(vp->magic, VOC_MAGIC_STRING, 20)) {
vocminor = LE_SHORT(vp->version) & 0xFF;
vocmajor = LE_SHORT(vp->version) / 256;
if (LE_SHORT(vp->version) != (0x1233 - LE_SHORT(vp->coded_ver)))
return -2; /* coded version mismatch */
return LE_SHORT(vp->headerlen) - sizeof(VocHeader); /* 0 mostly */
}
return -1; /* magic string fail */
}
/*
* helper for test_wavefile
*/
static size_t test_wavefile_read(int fd, u_char *buffer, size_t *size, size_t reqsize, int line)
{
if (*size >= reqsize)
return *size;
if ((size_t)safe_read(fd, buffer + *size, reqsize - *size) != reqsize - *size) {
error(_("read error (called from line %i)"), line);
prg_exit(EXIT_FAILURE);
}
return *size = reqsize;
}
#define check_wavefile_space(buffer, len, blimit) \
if (len > blimit) { \
blimit = len; \
if ((buffer = realloc(buffer, blimit)) == NULL) { \
error(_("not enough memory")); \
prg_exit(EXIT_FAILURE); \
} \
}
/*
* test, if it's a .WAV file, > 0 if ok (and set the speed, stereo etc.)
* == 0 if not
* Value returned is bytes to be discarded.
*/
static ssize_t test_wavefile(int fd, u_char *_buffer, size_t size)
{
WaveHeader *h = (WaveHeader *)_buffer;
u_char *buffer = NULL;
size_t blimit = 0;
WaveFmtBody *f;
WaveChunkHeader *c;
u_int type, len;
if (size < sizeof(WaveHeader))
return -1;
if (h->magic != WAV_RIFF || h->type != WAV_WAVE)
return -1;
if (size > sizeof(WaveHeader)) {
check_wavefile_space(buffer, size - sizeof(WaveHeader), blimit);
memcpy(buffer, _buffer + sizeof(WaveHeader), size - sizeof(WaveHeader));
}
size -= sizeof(WaveHeader);
while (1) {
check_wavefile_space(buffer, sizeof(WaveChunkHeader), blimit);
test_wavefile_read(fd, buffer, &size, sizeof(WaveChunkHeader), __LINE__);
c = (WaveChunkHeader*)buffer;
type = c->type;
len = LE_INT(c->length);
len += len % 2;
if (size > sizeof(WaveChunkHeader))
memmove(buffer, buffer + sizeof(WaveChunkHeader), size - sizeof(WaveChunkHeader));
size -= sizeof(WaveChunkHeader);
if (type == WAV_FMT)
break;
check_wavefile_space(buffer, len, blimit);
test_wavefile_read(fd, buffer, &size, len, __LINE__);
if (size > len)
memmove(buffer, buffer + len, size - len);
size -= len;
}
if (len < sizeof(WaveFmtBody)) {
error(_("unknown length of 'fmt ' chunk (read %u, should be %u at least)"),
len, (u_int)sizeof(WaveFmtBody));
prg_exit(EXIT_FAILURE);
}
check_wavefile_space(buffer, len, blimit);
test_wavefile_read(fd, buffer, &size, len, __LINE__);
f = (WaveFmtBody*) buffer;
if (LE_SHORT(f->format) == WAV_FMT_EXTENSIBLE) {
WaveFmtExtensibleBody *fe = (WaveFmtExtensibleBody*)buffer;
if (len < sizeof(WaveFmtExtensibleBody)) {
error(_("unknown length of extensible 'fmt ' chunk (read %u, should be %u at least)"),
len, (u_int)sizeof(WaveFmtExtensibleBody));
prg_exit(EXIT_FAILURE);
}
if (memcmp(fe->guid_tag, WAV_GUID_TAG, 14) != 0) {
error(_("wrong format tag in extensible 'fmt ' chunk"));
prg_exit(EXIT_FAILURE);
}
f->format = fe->guid_format;
}
if (LE_SHORT(f->format) != WAV_FMT_PCM &&
LE_SHORT(f->format) != WAV_FMT_IEEE_FLOAT) {
error(_("can't play WAVE-file format 0x%04x which is not PCM or FLOAT encoded"), LE_SHORT(f->format));
prg_exit(EXIT_FAILURE);
}
if (LE_SHORT(f->channels) < 1) {
error(_("can't play WAVE-files with %d tracks"), LE_SHORT(f->channels));
prg_exit(EXIT_FAILURE);
}
hwparams.channels = LE_SHORT(f->channels);
switch (LE_SHORT(f->bit_p_spl)) {
case 8:
if (hwparams.format != DEFAULT_FORMAT &&
hwparams.format != SND_PCM_FORMAT_U8)
fprintf(stderr, _("Warning: format is changed to U8
"));
hwparams.format = SND_PCM_FORMAT_U8;
break;
case 16:
if (hwparams.format != DEFAULT_FORMAT &&
hwparams.format != SND_PCM_FORMAT_S16_LE)
fprintf(stderr, _("Warning: format is changed to S16_LE
"));
hwparams.format = SND_PCM_FORMAT_S16_LE;
break;
case 24:
switch (LE_SHORT(f->byte_p_spl) / hwparams.channels) {
case 3:
if (hwparams.format != DEFAULT_FORMAT &&
hwparams.format != SND_PCM_FORMAT_S24_3LE)
fprintf(stderr, _("Warning: format is changed to S24_3LE
"));
hwparams.format = SND_PCM_FORMAT_S24_3LE;
break;
case 4:
if (hwparams.format != DEFAULT_FORMAT &&
hwparams.format != SND_PCM_FORMAT_S24_LE)
fprintf(stderr, _("Warning: format is changed to S24_LE
"));
hwparams.format = SND_PCM_FORMAT_S24_LE;
break;
default:
error(_(" can't play WAVE-files with sample %d bits in %d bytes wide (%d channels)"),
LE_SHORT(f->bit_p_spl), LE_SHORT(f->byte_p_spl), hwparams.channels);
prg_exit(EXIT_FAILURE);
}
break;
case 32:
if (LE_SHORT(f->format) == WAV_FMT_PCM)
hwparams.format = SND_PCM_FORMAT_S32_LE;
else if (LE_SHORT(f->format) == WAV_FMT_IEEE_FLOAT)
hwparams.format = SND_PCM_FORMAT_FLOAT_LE;
break;
default:
error(_(" can't play WAVE-files with sample %d bits wide"),
LE_SHORT(f->bit_p_spl));
prg_exit(EXIT_FAILURE);
}
hwparams.rate = LE_INT(f->sample_fq);
if (size > len)
memmove(buffer, buffer + len, size - len);
size -= len;
while (1) {
u_int type, len;
check_wavefile_space(buffer, sizeof(WaveChunkHeader), blimit);
test_wavefile_read(fd, buffer, &size, sizeof(WaveChunkHeader), __LINE__);
c = (WaveChunkHeader*)buffer;
type = c->type;
len = LE_INT(c->length);
if (size > sizeof(WaveChunkHeader))
memmove(buffer, buffer + sizeof(WaveChunkHeader), size - sizeof(WaveChunkHeader));
size -= sizeof(WaveChunkHeader);
if (type == WAV_DATA) {
if (len < pbrec_count && len < 0x7ffffffe)
pbrec_count = len;
if (size > 0)
memcpy(_buffer, buffer, size);
free(buffer);
return size;
}
len += len % 2;
check_wavefile_space(buffer, len, blimit);
test_wavefile_read(fd, buffer, &size, len, __LINE__);
if (size > len)
memmove(buffer, buffer + len, size - len);
size -= len;
}
/* shouldn't be reached */
return -1;
}
/*
*/
static int test_au(int fd, void *buffer)
{
AuHeader *ap = buffer;
if (ap->magic != AU_MAGIC)
return -1;
if (BE_INT(ap->hdr_size) > 128 || BE_INT(ap->hdr_size) < 24)
return -1;
pbrec_count = BE_INT(ap->data_size);
switch (BE_INT(ap->encoding)) {
case AU_FMT_ULAW:
if (hwparams.format != DEFAULT_FORMAT &&
hwparams.format != SND_PCM_FORMAT_MU_LAW)
fprintf(stderr, _("Warning: format is changed to MU_LAW
"));
hwparams.format = SND_PCM_FORMAT_MU_LAW;
break;
case AU_FMT_LIN8:
if (hwparams.format != DEFAULT_FORMAT &&
hwparams.format != SND_PCM_FORMAT_U8)
fprintf(stderr, _("Warning: format is changed to U8
"));
hwparams.format = SND_PCM_FORMAT_U8;
break;
case AU_FMT_LIN16:
if (hwparams.format != DEFAULT_FORMAT &&
hwparams.format != SND_PCM_FORMAT_S16_BE)
fprintf(stderr, _("Warning: format is changed to S16_BE
"));
hwparams.format = SND_PCM_FORMAT_S16_BE;
break;
default:
return -1;
}
hwparams.rate = BE_INT(ap->sample_rate);
if (hwparams.rate < 2000 || hwparams.rate > 256000)
return -1;
hwparams.channels = BE_INT(ap->channels);
if (hwparams.channels < 1 || hwparams.channels > 256)
return -1;
if ((size_t)safe_read(fd, buffer + sizeof(AuHeader), BE_INT(ap->hdr_size) - sizeof(AuHeader)) != BE_INT(ap->hdr_size) - sizeof(AuHeader)) {
error(_("read error"));
prg_exit(EXIT_FAILURE);
}
return 0;
}
static void show_available_sample_formats(snd_pcm_hw_params_t* params)
{
snd_pcm_format_t format;
fprintf(stderr, "Available formats:
");
for (format = 0; format < SND_PCM_FORMAT_LAST; format++) {
if (snd_pcm_hw_params_test_format(handle, params, format) == 0)
fprintf(stderr, "- %s
", snd_pcm_format_name(format));
}
}
static void set_params(void)
{
snd_pcm_hw_params_t *params;
snd_pcm_sw_params_t *swparams;
snd_pcm_uframes_t buffer_size;
int err;
size_t n;
unsigned int rate;
snd_pcm_uframes_t start_threshold, stop_threshold;
snd_pcm_hw_params_alloca(¶ms);
snd_pcm_sw_params_alloca(&swparams);
err = snd_pcm_hw_params_any(handle, params);
if (err < 0) {
error(_("Broken configuration for this PCM: no configurations available"));
prg_exit(EXIT_FAILURE);
}
if (mmap_flag) {
snd_pcm_access_mask_t *mask = alloca(snd_pcm_access_mask_sizeof());
snd_pcm_access_mask_none(mask);
snd_pcm_access_mask_set(mask, SND_PCM_ACCESS_MMAP_INTERLEAVED);
snd_pcm_access_mask_set(mask, SND_PCM_ACCESS_MMAP_NONINTERLEAVED);
snd_pcm_access_mask_set(mask, SND_PCM_ACCESS_MMAP_COMPLEX);
err = snd_pcm_hw_params_set_access_mask(handle, params, mask);
} else if (interleaved)
err = snd_pcm_hw_params_set_access(handle, params,
SND_PCM_ACCESS_RW_INTERLEAVED);
else
err = snd_pcm_hw_params_set_access(handle, params,
SND_PCM_ACCESS_RW_NONINTERLEAVED);
if (err < 0) {
error(_("Access type not available"));
prg_exit(EXIT_FAILURE);
}
err = snd_pcm_hw_params_set_format(handle, params, hwparams.format);
if (err < 0) {
error(_("Sample format non available"));
show_available_sample_formats(params);
prg_exit(EXIT_FAILURE);
}
err = snd_pcm_hw_params_set_channels(handle, params, hwparams.channels);
if (err < 0) {
error(_("Channels count non available"));
prg_exit(EXIT_FAILURE);
}
#if 0
err = snd_pcm_hw_params_set_periods_min(handle, params, 2);
assert(err >= 0);
#endif
rate = hwparams.rate;
err = snd_pcm_hw_params_set_rate_near(handle, params, &hwparams.rate, 0);
assert(err >= 0);
if ((float)rate * 1.05 < hwparams.rate || (float)rate * 0.95 > hwparams.rate) {
if (!quiet_mode) {
char plugex[64];
const char *pcmname = snd_pcm_name(handle);
fprintf(stderr, _("Warning: rate is not accurate (requested = %iHz, got = %iHz)
"), rate, hwparams.rate);
if (! pcmname || strchr(snd_pcm_name(handle), ':'))
*plugex = 0;
else
snprintf(plugex, sizeof(plugex), "(-Dplug:%s)",
snd_pcm_name(handle));
fprintf(stderr, _(" please, try the plug plugin %s
"),
plugex);
}
}
rate = hwparams.rate;
if (buffer_time == 0 && buffer_frames == 0) {
err = snd_pcm_hw_params_get_buffer_time_max(params,
&buffer_time, 0);
assert(err >= 0);
if (buffer_time > 500000)
buffer_time = 500000;
}
if (period_time == 0 && period_frames == 0) {
if (buffer_time > 0)
period_time = buffer_time / 4;
else
period_frames = buffer_frames / 4;
}
if (period_time > 0)
err = snd_pcm_hw_params_set_period_time_near(handle, params,
&period_time, 0);
else
err = snd_pcm_hw_params_set_period_size_near(handle, params,
&period_frames, 0);
assert(err >= 0);
if (buffer_time > 0) {
err = snd_pcm_hw_params_set_buffer_time_near(handle, params,
&buffer_time, 0);
} else {
err = snd_pcm_hw_params_set_buffer_size_near(handle, params,
&buffer_frames);
}
assert(err >= 0);
monotonic = snd_pcm_hw_params_is_monotonic(params);
can_pause = snd_pcm_hw_params_can_pause(params);
err = snd_pcm_hw_params(handle, params);
if (err < 0) {
error(_("Unable to install hw params:"));
snd_pcm_hw_params_dump(params, log);
prg_exit(EXIT_FAILURE);
}
snd_pcm_hw_params_get_period_size(params, &chunk_size, 0);
snd_pcm_hw_params_get_buffer_size(params, &buffer_size);
if (chunk_size == buffer_size) {
error(_("Can't use period equal to buffer size (%lu == %lu)"),
chunk_size, buffer_size);
prg_exit(EXIT_FAILURE);
}
snd_pcm_sw_params_current(handle, swparams);
if (avail_min < 0)
n = chunk_size;
else
n = (double) rate * avail_min / 1000000;
err = snd_pcm_sw_params_set_avail_min(handle, swparams, n);
/* round up to closest transfer boundary */
n = buffer_size;
if (start_delay <= 0) {
start_threshold = n + (double) rate * start_delay / 1000000;
} else
start_threshold = (double) rate * start_delay / 1000000;
if (start_threshold < 1)
start_threshold = 1;
if (start_threshold > n)
start_threshold = n;
err = snd_pcm_sw_params_set_start_threshold(handle, swparams, start_threshold);
assert(err >= 0);
if (stop_delay <= 0)
stop_threshold = buffer_size + (double) rate * stop_delay / 1000000;
else
stop_threshold = (double) rate * stop_delay / 1000000;
err = snd_pcm_sw_params_set_stop_threshold(handle, swparams, stop_threshold);
assert(err >= 0);
if (snd_pcm_sw_params(handle, swparams) < 0) {
error(_("unable to install sw params:"));
snd_pcm_sw_params_dump(swparams, log);
prg_exit(EXIT_FAILURE);
}
if (verbose)
snd_pcm_dump(handle, log);
bits_per_sample = snd_pcm_format_physical_width(hwparams.format);
bits_per_frame = bits_per_sample * hwparams.channels;
chunk_bytes = chunk_size * bits_per_frame / 8;
audiobuf = realloc(audiobuf, chunk_bytes);
if (audiobuf == NULL) {
error(_("not enough memory"));
prg_exit(EXIT_FAILURE);
}
// fprintf(stderr, "real chunk_size = %i, frags = %i, total = %i
", chunk_size, setup.buf.block.frags, setup.buf.block.frags * chunk_size);
/* stereo VU-meter isn't always available... */
if (vumeter == VUMETER_STEREO) {
if (hwparams.channels != 2 || !interleaved || verbose > 2)
vumeter = VUMETER_MONO;
}
/* show mmap buffer arragment */
if (mmap_flag && verbose) {
const snd_pcm_channel_area_t *areas;
snd_pcm_uframes_t offset, size = chunk_size;
int i;
err = snd_pcm_mmap_begin(handle, &areas, &offset, &size);
if (err < 0) {
error(_("snd_pcm_mmap_begin problem: %s"), snd_strerror(err));
prg_exit(EXIT_FAILURE);
}
for (i = 0; i < hwparams.channels; i++)
fprintf(stderr, "mmap_area[%i] = %p,%u,%u (%u)
", i, areas[i].addr, areas[i].first, areas[i].step, snd_pcm_format_physical_width(hwparams.format));
/* not required, but for sure */
snd_pcm_mmap_commit(handle, offset, 0);
}
buffer_frames = buffer_size; /* for position test */
}
static void init_stdin(void)
{
struct termios term;
long flags;
if (!interactive)
return;
tcgetattr(fileno(stdin), &term);
term_c_lflag = term.c_lflag;
if (fd == fileno(stdin))
return;
flags = fcntl(fileno(stdin), F_GETFL);
if (flags < 0 || fcntl(fileno(stdin), F_SETFL, flags|O_NONBLOCK) < 0)
fprintf(stderr, _("stdin O_NONBLOCK flag setup failed
"));
term.c_lflag &= ~ICANON;
tcsetattr(fileno(stdin), TCSANOW, &term);
}
static void done_stdin(void)
{
struct termios term;
if (!interactive)
return;
if (fd == fileno(stdin) || term_c_lflag == -1)
return;
tcgetattr(fileno(stdin), &term);
term.c_lflag = term_c_lflag;
tcsetattr(fileno(stdin), TCSANOW, &term);
}
static void do_pause(void)
{
int err;
unsigned char b;
if (!can_pause) {
fprintf(stderr, _("\rPAUSE command ignored (no hw support)
"));
return;
}
err = snd_pcm_pause(handle, 1);
if (err < 0) {
error(_("pause push error: %s"), snd_strerror(err));
return;
}
while (1) {
while (read(fileno(stdin), &b, 1) != 1);
if (b == ' ' || b == '\r') {
while (read(fileno(stdin), &b, 1) == 1);
err = snd_pcm_pause(handle, 0);
if (err < 0)
error(_("pause release error: %s"), snd_strerror(err));
return;
}
}
}
static void check_stdin(void)
{
unsigned char b;
if (!interactive)
return;
if (fd != fileno(stdin)) {
while (read(fileno(stdin), &b, 1) == 1) {
if (b == ' ' || b == '\r') {
while (read(fileno(stdin), &b, 1) == 1);
fprintf(stderr, _("\r=== PAUSE === "));
fflush(stderr);
do_pause();
fprintf(stderr, " \r");
fflush(stderr);
}
}
}
}
#ifndef timersub
#define timersub(a, b, result) \
do { \
(result)->tv_sec = (a)->tv_sec - (b)->tv_sec; \
(result)->tv_usec = (a)->tv_usec - (b)->tv_usec; \
if ((result)->tv_usec < 0) { \
--(result)->tv_sec; \
(result)->tv_usec += 1000000; \
} \
} while (0)
#endif
#ifndef timermsub
#define timermsub(a, b, result) \
do { \
(result)->tv_sec = (a)->tv_sec - (b)->tv_sec; \
(result)->tv_nsec = (a)->tv_nsec - (b)->tv_nsec; \
if ((result)->tv_nsec < 0) { \
--(result)->tv_sec; \
(result)->tv_nsec += 1000000000L; \
} \
} while (0)
#endif
/* I/O error handler */
static void xrun(void)
{
snd_pcm_status_t *status;
int res;
snd_pcm_status_alloca(&status);
if ((res = snd_pcm_status(handle, status))<0) {
error(_("status error: %s"), snd_strerror(res));
prg_exit(EXIT_FAILURE);
}
if (snd_pcm_status_get_state(status) == SND_PCM_STATE_XRUN) {
if (monotonic) {
#ifdef HAVE_CLOCK_GETTIME
struct timespec now, diff, tstamp;
clock_gettime(CLOCK_MONOTONIC, &now);
snd_pcm_status_get_trigger_htstamp(status, &tstamp);
timermsub(&now, &tstamp, &diff);
fprintf(stderr, _("%s!!! (at least %.3f ms long)
"),
stream == SND_PCM_STREAM_PLAYBACK ? _("underrun") : _("overrun"),
diff.tv_sec * 1000 + diff.tv_nsec / 10000000.0);
#else
fprintf(stderr, "%s !!!
", _("underrun"));
#endif
} else {
struct timeval now, diff, tstamp;
gettimeofday(&now, 0);
snd_pcm_status_get_trigger_tstamp(status, &tstamp);
timersub(&now, &tstamp, &diff);
fprintf(stderr, _("%s!!! (at least %.3f ms long)
"),
stream == SND_PCM_STREAM_PLAYBACK ? _("underrun") : _("overrun"),
diff.tv_sec * 1000 + diff.tv_usec / 1000.0);
}
if (verbose) {
fprintf(stderr, _("Status:
"));
snd_pcm_status_dump(status, log);
}
if ((res = snd_pcm_prepare(handle))<0) {
error(_("xrun: prepare error: %s"), snd_strerror(res));
prg_exit(EXIT_FAILURE);
}
return; /* ok, data should be accepted again */
} if (snd_pcm_status_get_state(status) == SND_PCM_STATE_DRAINING) {
if (verbose) {
fprintf(stderr, _("Status(DRAINING):
"));
snd_pcm_status_dump(status, log);
}
if (stream == SND_PCM_STREAM_CAPTURE) {
fprintf(stderr, _("capture stream format change? attempting recover...
"));
if ((res = snd_pcm_prepare(handle))<0) {
error(_("xrun(DRAINING): prepare error: %s"), snd_strerror(res));
prg_exit(EXIT_FAILURE);
}
return;
}
}
if (verbose) {
fprintf(stderr, _("Status(R/W):
"));
snd_pcm_status_dump(status, log);
}
error(_("read/write error, state = %s"), snd_pcm_state_name(snd_pcm_status_get_state(status)));
prg_exit(EXIT_FAILURE);
}
/* I/O suspend handler */
static void suspend(void)
{
int res;
if (!quiet_mode)
fprintf(stderr, _("Suspended. Trying resume. ")); fflush(stderr);
while ((res = snd_pcm_resume(handle)) == -EAGAIN)
sleep(1); /* wait until suspend flag is released */
if (res < 0) {
if (!quiet_mode)
fprintf(stderr, _("Failed. Restarting stream. ")); fflush(stderr);
if ((res = snd_pcm_prepare(handle)) < 0) {
error(_("suspend: prepare error: %s"), snd_strerror(res));
prg_exit(EXIT_FAILURE);
}
}
if (!quiet_mode)
fprintf(stderr, _("Done.
"));
}
static void print_vu_meter_mono(int perc, int maxperc)
{
const int bar_length = 50;
char line[80];
int val;
for (val = 0; val <= perc * bar_length / 100 && val < bar_length; val++)
line[val] = '#';
for (; val <= maxperc * bar_length / 100 && val < bar_length; val++)
line[val] = ' ';
line[val] = '+';
for (++val; val <= bar_length; val++)
line[val] = ' ';
if (maxperc > 99)
sprintf(line + val, "| MAX");
else
sprintf(line + val, "| %02i%%", maxperc);
fputs(line, stdout);
if (perc > 100)
printf(_(" !clip "));
}
static void print_vu_meter_stereo(int *perc, int *maxperc)
{
const int bar_length = 35;
char line[80];
int c;
memset(line, ' ', sizeof(line) - 1);
line[bar_length + 3] = '|';
for (c = 0; c < 2; c++) {
int p = perc[c] * bar_length / 100;
char tmp[4];
if (p > bar_length)
p = bar_length;
if (c)
memset(line + bar_length + 6 + 1, '#', p);
else
memset(line + bar_length - p - 1, '#', p);
p = maxperc[c] * bar_length / 100;
if (p > bar_length)
p = bar_length;
if (c)
line[bar_length + 6 + 1 + p] = '+';
else
line[bar_length - p - 1] = '+';
if (maxperc[c] > 99)
sprintf(tmp, "MAX");
else
sprintf(tmp, "%02d%%", maxperc[c]);
if (c)
memcpy(line + bar_length + 3 + 1, tmp, 3);
else
memcpy(line + bar_length, tmp, 3);
}
line[bar_length * 2 + 6 + 2] = 0;
fputs(line, stdout);
}
static void print_vu_meter(signed int *perc, signed int *maxperc)
{
if (vumeter == VUMETER_STEREO)
print_vu_meter_stereo(perc, maxperc);
else
print_vu_meter_mono(*perc, *maxperc);
}
/* peak handler */
static void compute_max_peak(u_char *data, size_t count)
{
signed int val, max, perc[2], max_peak[2];
static int run = 0;
size_t ocount = count;
int format_little_endian = snd_pcm_format_little_endian(hwparams.format);
int ichans, c;
if (vumeter == VUMETER_STEREO)
ichans = 2;
else
ichans = 1;
memset(max_peak, 0, sizeof(max_peak));
switch (bits_per_sample) {
case 8: {
signed char *valp = (signed char *)data;
signed char mask = snd_pcm_format_silence(hwparams.format);
c = 0;
while (count-- > 0) {
val = *valp++ ^ mask;
val = abs(val);
if (max_peak[c] < val)
max_peak[c] = val;
if (vumeter == VUMETER_STEREO)
c = !c;
}
break;
}
case 16: {
signed short *valp = (signed short *)data;
signed short mask = snd_pcm_format_silence_16(hwparams.format);
signed short sval;
count /= 2;
c = 0;
while (count-- > 0) {
if (format_little_endian)
sval = le16toh(*valp);
else
sval = be16toh(*valp);
sval = abs(sval) ^ mask;
if (max_peak[c] < sval)
max_peak[c] = sval;
valp++;
if (vumeter == VUMETER_STEREO)
c = !c;
}
break;
}
case 24: {
unsigned char *valp = data;
signed int mask = snd_pcm_format_silence_32(hwparams.format);
count /= 3;
c = 0;
while (count-- > 0) {
if (format_little_endian) {
val = valp[0] | (valp[1]<<8) | (valp[2]<<16);
} else {
val = (valp[0]<<16) | (valp[1]<<8) | valp[2];
}
/* Correct signed bit in 32-bit value */
if (val & (1<<(bits_per_sample-1))) {
val |= 0xff<<24; /* Negate upper bits too */
}
val = abs(val) ^ mask;
if (max_peak[c] < val)
max_peak[c] = val;
valp += 3;
if (vumeter == VUMETER_STEREO)
c = !c;
}
break;
}
case 32: {
signed int *valp = (signed int *)data;
signed int mask = snd_pcm_format_silence_32(hwparams.format);
count /= 4;
c = 0;
while (count-- > 0) {
if (format_little_endian)
val = le32toh(*valp);
else
val = be32toh(*valp);
val = abs(val) ^ mask;
if (max_peak[c] < val)
max_peak[c] = val;
valp++;
if (vumeter == VUMETER_STEREO)
c = !c;
}
break;
}
default:
if (run == 0) {
fprintf(stderr, _("Unsupported bit size %d.
"), (int)bits_per_sample);
run = 1;
}
return;
}
max = 1 << (bits_per_sample-1);
if (max <= 0)
max = 0x7fffffff;
for (c = 0; c < ichans; c++) {
if (bits_per_sample > 16)
perc[c] = max_peak[c] / (max / 100);
else
perc[c] = max_peak[c] * 100 / max;
}
if (interleaved && verbose <= 2) {
static int maxperc[2];
static time_t t=0;
const time_t tt=time(NULL);
if(tt>t) {
t=tt;
maxperc[0] = 0;
maxperc[1] = 0;
}
for (c = 0; c < ichans; c++)
if (perc[c] > maxperc[c])
maxperc[c] = perc[c];
putchar('\r');
print_vu_meter(perc, maxperc);
fflush(stdout);
}
else if(verbose==3) {
printf(_("Max peak (%li samples): 0x%08x "), (long)ocount, max_peak[0]);
for (val = 0; val < 20; val++)
if (val <= perc[0] / 5)
putchar('#');
else
putchar(' ');
printf(" %i%%
", perc[0]);
fflush(stdout);
}
}
static void do_test_position(void)
{
static long counter = 0;
static time_t tmr = -1;
time_t now;
static float availsum, delaysum, samples;
static snd_pcm_sframes_t maxavail, maxdelay;
static snd_pcm_sframes_t minavail, mindelay;
static snd_pcm_sframes_t badavail = 0, baddelay = 0;
snd_pcm_sframes_t outofrange;
snd_pcm_sframes_t avail, delay;
int err;
err = snd_pcm_avail_delay(handle, &avail, &delay);
if (err < 0)
return;
outofrange = (test_coef * (snd_pcm_sframes_t)buffer_frames) / 2;
if (avail > outofrange || avail < -outofrange ||
delay > outofrange || delay < -outofrange) {
badavail = avail; baddelay = delay;
availsum = delaysum = samples = 0;
maxavail = maxdelay = 0;
minavail = mindelay = buffer_frames * 16;
fprintf(stderr, _("Suspicious buffer position (%li total): "
"avail = %li, delay = %li, buffer = %li
"),
++counter, (long)avail, (long)delay, (long)buffer_frames);
} else if (verbose) {
time(&now);
if (tmr == (time_t) -1) {
tmr = now;
availsum = delaysum = samples = 0;
maxavail = maxdelay = 0;
minavail = mindelay = buffer_frames * 16;
}
if (avail > maxavail)
maxavail = avail;
if (delay > maxdelay)
maxdelay = delay;
if (avail < minavail)
minavail = avail;
if (delay < mindelay)
mindelay = delay;
availsum += avail;
delaysum += delay;
samples++;
if (avail != 0 && now != tmr) {
fprintf(stderr, "BUFPOS: avg%li/%li "
"min%li/%li max%li/%li (%li) (%li:%li/%li)
",
(long)(availsum / samples),
(long)(delaysum / samples),
(long)minavail, (long)mindelay,
(long)maxavail, (long)maxdelay,
(long)buffer_frames,
counter, badavail, baddelay);
tmr = now;
}
}
}
/*
* write function
*/
static ssize_t pcm_write(u_char *data, size_t count)
{
ssize_t r;
ssize_t result = 0;
if (count < chunk_size) {
snd_pcm_format_set_silence(hwparams.format, data + count * bits_per_frame / 8, (chunk_size - count) * hwparams.channels);
count = chunk_size;
}
while (count > 0) {
if (test_position)
do_test_position();
check_stdin();
r = writei_func(handle, data, count);
if (test_position)
do_test_position();
if (r == -EAGAIN || (r >= 0 && (size_t)r < count)) {
if (!test_nowait)
snd_pcm_wait(handle, 100);
} else if (r == -EPIPE) {
xrun();
} else if (r == -ESTRPIPE) {
suspend();
} else if (r < 0) {
error(_("write error: %s"), snd_strerror(r));
prg_exit(EXIT_FAILURE);
}
if (r > 0) {
if (vumeter)
compute_max_peak(data, r * hwparams.channels);
result += r;
count -= r;
data += r * bits_per_frame / 8;
}
}
return result;
}
static ssize_t pcm_writev(u_char **data, unsigned int channels, size_t count)
{
ssize_t r;
size_t result = 0;
if (count != chunk_size) {
unsigned int channel;
size_t offset = count;
size_t remaining = chunk_size - count;
for (channel = 0; channel < channels; channel++)
snd_pcm_format_set_silence(hwparams.format, data[channel] + offset * bits_per_sample / 8, remaining);
count = chunk_size;
}
while (count > 0) {
unsigned int channel;
void *bufs[channels];
size_t offset = result;
for (channel = 0; channel < channels; channel++)
bufs[channel] = data[channel] + offset * bits_per_sample / 8;
if (test_position)
do_test_position();
check_stdin();
r = writen_func(handle, bufs, count);
if (test_position)
do_test_position();
if (r == -EAGAIN || (r >= 0 && (size_t)r < count)) {
if (!test_nowait)
snd_pcm_wait(handle, 100);
} else if (r == -EPIPE) {
xrun();
} else if (r == -ESTRPIPE) {
suspend();
} else if (r < 0) {
error(_("writev error: %s"), snd_strerror(r));
prg_exit(EXIT_FAILURE);
}
if (r > 0) {
if (vumeter) {
for (channel = 0; channel < channels; channel++)
compute_max_peak(data[channel], r);
}
result += r;
count -= r;
}
}
return result;
}
/*
* read function
*/
static ssize_t pcm_read(u_char *data, size_t rcount)
{
ssize_t r;
size_t result = 0;
size_t count = rcount;
if (count != chunk_size) {
count = chunk_size;
}
while (count > 0) {
if (test_position)
do_test_position();
check_stdin();
r = readi_func(handle, data, count);
if (test_position)
do_test_position();
if (r == -EAGAIN || (r >= 0 && (size_t)r < count)) {
if (!test_nowait)
snd_pcm_wait(handle, 100);
} else if (r == -EPIPE) {
xrun();
} else if (r == -ESTRPIPE) {
suspend();
} else if (r < 0) {
error(_("read error: %s"), snd_strerror(r));
prg_exit(EXIT_FAILURE);
}
if (r > 0) {
if (vumeter)
compute_max_peak(data, r * hwparams.channels);
result += r;
count -= r;
data += r * bits_per_frame / 8;
}
}
return rcount;
}
static ssize_t pcm_readv(u_char **data, unsigned int channels, size_t rcount)
{
ssize_t r;
size_t result = 0;
size_t count = rcount;
if (count != chunk_size) {
count = chunk_size;
}
while (count > 0) {
unsigned int channel;
void *bufs[channels];
size_t offset = result;
for (channel = 0; channel < channels; channel++)
bufs[channel] = data[channel] + offset * bits_per_sample / 8;
if (test_position)
do_test_position();
check_stdin();
r = readn_func(handle, bufs, count);
if (test_position)
do_test_position();
if (r == -EAGAIN || (r >= 0 && (size_t)r < count)) {
if (!test_nowait)
snd_pcm_wait(handle, 100);
} else if (r == -EPIPE) {
xrun();
} else if (r == -ESTRPIPE) {
suspend();
} else if (r < 0) {
error(_("readv error: %s"), snd_strerror(r));
prg_exit(EXIT_FAILURE);
}
if (r > 0) {
if (vumeter) {
for (channel = 0; channel < channels; channel++)
compute_max_peak(data[channel], r);
}
result += r;
count -= r;
}
}
return rcount;
}
/*
* ok, let's play a .voc file
*/
static ssize_t voc_pcm_write(u_char *data, size_t count)
{
ssize_t result = count, r;
size_t size;
while (count > 0) {
size = count;
if (size > chunk_bytes - buffer_pos)
size = chunk_bytes - buffer_pos;
memcpy(audiobuf + buffer_pos, data, size);
data += size;
count -= size;
buffer_pos += size;
if ((size_t)buffer_pos == chunk_bytes) {
if ((size_t)(r = pcm_write(audiobuf, chunk_size)) != chunk_size)
return r;
buffer_pos = 0;
}
}
return result;
}
static void voc_write_silence(unsigned x)
{
unsigned l;
u_char *buf;
buf = (u_char *) malloc(chunk_bytes);
if (buf == NULL) {
error(_("can't allocate buffer for silence"));
return; /* not fatal error */
}
snd_pcm_format_set_silence(hwparams.format, buf, chunk_size * hwparams.channels);
while (x > 0) {
l = x;
if (l > chunk_size)
l = chunk_size;
if (voc_pcm_write(buf, l) != (ssize_t)l) {
error(_("write error"));
prg_exit(EXIT_FAILURE);
}
x -= l;
}
free(buf);
}
static void voc_pcm_flush(void)
{
if (buffer_pos > 0) {
size_t b;
if (snd_pcm_format_set_silence(hwparams.format, audiobuf + buffer_pos, chunk_bytes - buffer_pos * 8 / bits_per_sample) < 0)
fprintf(stderr, _("voc_pcm_flush - silence error"));
b = chunk_size;
if (pcm_write(audiobuf, b) != (ssize_t)b)
error(_("voc_pcm_flush error"));
}
snd_pcm_nonblock(handle, 0);
snd_pcm_drain(handle);
snd_pcm_nonblock(handle, nonblock);
}
static void voc_play(int fd, int ofs, char *name)
{
int l;
VocBlockType *bp;
VocVoiceData *vd;
VocExtBlock *eb;
size_t nextblock, in_buffer;
u_char *data, *buf;
char was_extended = 0, output = 0;
u_short *sp, repeat = 0;
size_t silence;
off64_t filepos = 0;
#define COUNT(x) nextblock -= x; in_buffer -= x; data += x
#define COUNT1(x) in_buffer -= x; data += x
data = buf = (u_char *)malloc(64 * 1024);
buffer_pos = 0;
if (data == NULL) {
error(_("malloc error"));
prg_exit(EXIT_FAILURE);
}
if (!quiet_mode) {
fprintf(stderr, _("Playing Creative Labs Channel file '%s'...
"), name);
}
/* first we waste the rest of header, ugly but we don't need seek */
while (ofs > (ssize_t)chunk_bytes) {
if ((size_t)safe_read(fd, buf, chunk_bytes) != chunk_bytes) {
error(_("read error"));
prg_exit(EXIT_FAILURE);
}
ofs -= chunk_bytes;
}
if (ofs) {
if (safe_read(fd, buf, ofs) != ofs) {
error(_("read error"));
prg_exit(EXIT_FAILURE);
}
}
hwparams.format = DEFAULT_FORMAT;
hwparams.channels = 1;
hwparams.rate = DEFAULT_SPEED;
set_params();
in_buffer = nextblock = 0;
while (1) {
Fill_the_buffer: /* need this for repeat */
if (in_buffer < 32) {
/* move the rest of buffer to pos 0 and fill the buf up */
if (in_buffer)
memcpy(buf, data, in_buffer);
data = buf;
if ((l = safe_read(fd, buf + in_buffer, chunk_bytes - in_buffer)) > 0)
in_buffer += l;
else if (!in_buffer) {
/* the file is truncated, so simulate 'Terminator'
and reduce the datablock for safe landing */
nextblock = buf[0] = 0;
if (l == -1) {
perror(name);
prg_exit(EXIT_FAILURE);
}
}
}
while (!nextblock) { /* this is a new block */
if (in_buffer < sizeof(VocBlockType))
goto __end;
bp = (VocBlockType *) data;
COUNT1(sizeof(VocBlockType));
nextblock = VOC_DATALEN(bp);
if (output && !quiet_mode)
fprintf(stderr, "
"); /* write /n after ASCII-out */
output = 0;
switch (bp->type) {
case 0:
#if 0
d_printf("Terminator
");
#endif
return; /* VOC-file stop */
case 1:
vd = (VocVoiceData *) data;
COUNT1(sizeof(VocVoiceData));
/* we need a SYNC, before we can set new SPEED, STEREO ... */
if (!was_extended) {
hwparams.rate = (int) (vd->tc);
hwparams.rate = 1000000 / (256 - hwparams.rate);
#if 0
d_printf("Channel data %d Hz
", dsp_speed);
#endif
if (vd->pack) { /* /dev/dsp can't it */
error(_("can't play packed .voc files"));
return;
}
if (hwparams.channels == 2) /* if we are in Stereo-Mode, switch back */
hwparams.channels = 1;
} else { /* there was extended block */
hwparams.channels = 2;
was_extended = 0;
}
set_params();
break;
case 2: /* nothing to do, pure data */
#if 0
d_printf("Channel continuation
");
#endif
break;
case 3: /* a silence block, no data, only a count */
sp = (u_short *) data;
COUNT1(sizeof(u_short));
hwparams.rate = (int) (*data);
COUNT1(1);
hwparams.rate = 1000000 / (256 - hwparams.rate);
set_params();
silence = (((size_t) * sp) * 1000) / hwparams.rate;
#if 0
d_printf("Silence for %d ms
", (int) silence);
#endif
voc_write_silence(*sp);
break;
case 4: /* a marker for syncronisation, no effect */
sp = (u_short *) data;
COUNT1(sizeof(u_short));
#if 0
d_printf("Marker %d
", *sp);
#endif
break;
case 5: /* ASCII text, we copy to stderr */
output = 1;
#if 0
d_printf("ASCII - text :
");
#endif
break;
case 6: /* repeat marker, says repeatcount */
/* my specs don't say it: maybe this can be recursive, but
I don't think somebody use it */
repeat = *(u_short *) data;
COUNT1(sizeof(u_short));
#if 0
d_printf("Repeat loop %d times
", repeat);
#endif
if (filepos >= 0) { /* if < 0, one seek fails, why test another */
if ((filepos = lseek64(fd, 0, 1)) < 0) {
error(_("can't play loops; %s isn't seekable
"), name);
repeat = 0;
} else {
filepos -= in_buffer; /* set filepos after repeat */
}
} else {
repeat = 0;
}
break;
case 7: /* ok, lets repeat that be rewinding tape */
if (repeat) {
if (repeat != 0xFFFF) {
#if 0
d_printf("Repeat loop %d
", repeat);
#endif
--repeat;
}
#if 0
else
d_printf("Neverending loop
");
#endif
lseek64(fd, filepos, 0);
in_buffer = 0; /* clear the buffer */
goto Fill_the_buffer;
}
#if 0
else
d_printf("End repeat loop
");
#endif
break;
case 8: /* the extension to play Stereo, I have SB 1.0 :-( */
was_extended = 1;
eb = (VocExtBlock *) data;
COUNT1(sizeof(VocExtBlock));
hwparams.rate = (int) (eb->tc);
hwparams.rate = 256000000L / (65536 - hwparams.rate);
hwparams.channels = eb->mode == VOC_MODE_STEREO ? 2 : 1;
if (hwparams.channels == 2)
hwparams.rate = hwparams.rate >> 1;
if (eb->pack) { /* /dev/dsp can't it */
error(_("can't play packed .voc files"));
return;
}
#if 0
d_printf("Extended block %s %d Hz
",
(eb->mode ? "Stereo" : "Mono"), dsp_speed);
#endif
break;
default:
error(_("unknown blocktype %d. terminate."), bp->type);
return;
} /* switch (bp->type) */
} /* while (! nextblock) */
/* put nextblock data bytes to dsp */
l = in_buffer;
if (nextblock < (size_t)l)
l = nextblock;
if (l) {
if (output && !quiet_mode) {
if (write(2, data, l) != l) { /* to stderr */
error(_("write error"));
prg_exit(EXIT_FAILURE);
}
} else {
if (voc_pcm_write(data, l) != l) {
error(_("write error"));
prg_exit(EXIT_FAILURE);
}
}
COUNT(l);
}
} /* while(1) */
__end:
voc_pcm_flush();
free(buf);
}
/* that was a big one, perhaps somebody split it :-) */
/* setting the globals for playing raw data */
static void init_raw_data(void)
{
hwparams = rhwparams;
}
/* calculate the data count to read from/to dsp */
static off64_t calc_count(void)
{
off64_t count;
if (timelimit == 0) {
count = pbrec_count;
} else {
count = snd_pcm_format_size(hwparams.format, hwparams.rate * hwparams.channels);
count *= (off64_t)timelimit;
}
return count < pbrec_count ? count : pbrec_count;
}
/* write a .VOC-header */
static void begin_voc(int fd, size_t cnt)
{
VocHeader vh;
VocBlockType bt;
VocVoiceData vd;
VocExtBlock eb;
memcpy(vh.magic, VOC_MAGIC_STRING, 20);
vh.headerlen = LE_SHORT(sizeof(VocHeader));
vh.version = LE_SHORT(VOC_ACTUAL_VERSION);
vh.coded_ver = LE_SHORT(0x1233 - VOC_ACTUAL_VERSION);
if (write(fd, &vh, sizeof(VocHeader)) != sizeof(VocHeader)) {
error(_("write error"));
prg_exit(EXIT_FAILURE);
}
if (hwparams.channels > 1) {
/* write an extended block */
bt.type = 8;
bt.datalen = 4;
bt.datalen_m = bt.datalen_h = 0;
if (write(fd, &bt, sizeof(VocBlockType)) != sizeof(VocBlockType)) {
error(_("write error"));
prg_exit(EXIT_FAILURE);
}
eb.tc = LE_SHORT(65536 - 256000000L / (hwparams.rate << 1));
eb.pack = 0;
eb.mode = 1;
if (write(fd, &eb, sizeof(VocExtBlock)) != sizeof(VocExtBlock)) {
error(_("write error"));
prg_exit(EXIT_FAILURE);
}
}
bt.type = 1;
cnt += sizeof(VocVoiceData); /* Channel_data block follows */
bt.datalen = (u_char) (cnt & 0xFF);
bt.datalen_m = (u_char) ((cnt & 0xFF00) >> 8);
bt.datalen_h = (u_char) ((cnt & 0xFF0000) >> 16);
if (write(fd, &bt, sizeof(VocBlockType)) != sizeof(VocBlockType)) {
error(_("write error"));
prg_exit(EXIT_FAILURE);
}
vd.tc = (u_char) (256 - (1000000 / hwparams.rate));
vd.pack = 0;
if (write(fd, &vd, sizeof(VocVoiceData)) != sizeof(VocVoiceData)) {
error(_("write error"));
prg_exit(EXIT_FAILURE);
}
}
/* write a WAVE-header */
static void begin_wave(int fd, size_t cnt)
{
WaveHeader h;
WaveFmtBody f;
WaveChunkHeader cf, cd;
int bits;
u_int tmp;
u_short tmp2;
/* WAVE cannot handle greater than 32bit (signed?) int */
if (cnt == (size_t)-2)
cnt = 0x7fffff00;
bits = 8;
switch ((unsigned long) hwparams.format) {
case SND_PCM_FORMAT_U8:
bits = 8;
break;
case SND_PCM_FORMAT_S16_LE:
bits = 16;
break;
case SND_PCM_FORMAT_S32_LE:
case SND_PCM_FORMAT_FLOAT_LE:
bits = 32;
break;
case SND_PCM_FORMAT_S24_LE:
case SND_PCM_FORMAT_S24_3LE:
bits = 24;
break;
default:
error(_("Wave doesn't support %s format..."), snd_pcm_format_name(hwparams.format));
prg_exit(EXIT_FAILURE);
}
h.magic = WAV_RIFF;
tmp = cnt + sizeof(WaveHeader) + sizeof(WaveChunkHeader) + sizeof(WaveFmtBody) + sizeof(WaveChunkHeader) - 8;
h.length = LE_INT(tmp);
h.type = WAV_WAVE;
cf.type = WAV_FMT;
cf.length = LE_INT(16);
if (hwparams.format == SND_PCM_FORMAT_FLOAT_LE)
f.format = LE_SHORT(WAV_FMT_IEEE_FLOAT);
else
f.format = LE_SHORT(WAV_FMT_PCM);
f.channels = LE_SHORT(hwparams.channels);
f.sample_fq = LE_INT(hwparams.rate);
#if 0
tmp2 = (samplesize == 8) ? 1 : 2;
f.byte_p_spl = LE_SHORT(tmp2);
tmp = dsp_speed * hwparams.channels * (u_int) tmp2;
#else
tmp2 = hwparams.channels * snd_pcm_format_physical_width(hwparams.format) / 8;
f.byte_p_spl = LE_SHORT(tmp2);
tmp = (u_int) tmp2 * hwparams.rate;
#endif
f.byte_p_sec = LE_INT(tmp);
f.bit_p_spl = LE_SHORT(bits);
cd.type = WAV_DATA;
cd.length = LE_INT(cnt);
if (write(fd, &h, sizeof(WaveHeader)) != sizeof(WaveHeader) ||
write(fd, &cf, sizeof(WaveChunkHeader)) != sizeof(WaveChunkHeader) ||
write(fd, &f, sizeof(WaveFmtBody)) != sizeof(WaveFmtBody) ||
write(fd, &cd, sizeof(WaveChunkHeader)) != sizeof(WaveChunkHeader)) {
error(_("write error"));
prg_exit(EXIT_FAILURE);
}
}
/* write a Au-header */
static void begin_au(int fd, size_t cnt)
{
AuHeader ah;
ah.magic = AU_MAGIC;
ah.hdr_size = BE_INT(24);
ah.data_size = BE_INT(cnt);
switch ((unsigned long) hwparams.format) {
case SND_PCM_FORMAT_MU_LAW:
ah.encoding = BE_INT(AU_FMT_ULAW);
break;
case SND_PCM_FORMAT_U8:
ah.encoding = BE_INT(AU_FMT_LIN8);
break;
case SND_PCM_FORMAT_S16_BE:
ah.encoding = BE_INT(AU_FMT_LIN16);
break;
default:
error(_("Sparc Audio doesn't support %s format..."), snd_pcm_format_name(hwparams.format));
prg_exit(EXIT_FAILURE);
}
ah.sample_rate = BE_INT(hwparams.rate);
ah.channels = BE_INT(hwparams.channels);
if (write(fd, &ah, sizeof(AuHeader)) != sizeof(AuHeader)) {
error(_("write error"));
prg_exit(EXIT_FAILURE);
}
}
/* closing .VOC */
static void end_voc(int fd)
{
off64_t length_seek;
VocBlockType bt;
size_t cnt;
char dummy = 0; /* Write a Terminator */
if (write(fd, &dummy, 1) != 1) {
error(_("write error"));
prg_exit(EXIT_FAILURE);
}
length_seek = sizeof(VocHeader);
if (hwparams.channels > 1)
length_seek += sizeof(VocBlockType) + sizeof(VocExtBlock);
bt.type = 1;
cnt = fdcount;
cnt += sizeof(VocVoiceData); /* Channel_data block follows */
if (cnt > 0x00ffffff)
cnt = 0x00ffffff;
bt.datalen = (u_char) (cnt & 0xFF);
bt.datalen_m = (u_char) ((cnt & 0xFF00) >> 8);
bt.datalen_h = (u_char) ((cnt & 0xFF0000) >> 16);
if (lseek64(fd, length_seek, SEEK_SET) == length_seek)
write(fd, &bt, sizeof(VocBlockType));
if (fd != 1)
close(fd);
}
static void end_wave(int fd)
{ /* only close output */
WaveChunkHeader cd;
off64_t length_seek;
off64_t filelen;
u_int rifflen;
length_seek = sizeof(WaveHeader) +
sizeof(WaveChunkHeader) +
sizeof(WaveFmtBody);
cd.type = WAV_DATA;
cd.length = fdcount > 0x7fffffff ? LE_INT(0x7fffffff) : LE_INT(fdcount);
filelen = fdcount + 2*sizeof(WaveChunkHeader) + sizeof(WaveFmtBody) + 4;
rifflen = filelen > 0x7fffffff ? LE_INT(0x7fffffff) : LE_INT(filelen);
if (lseek64(fd, 4, SEEK_SET) == 4)
write(fd, &rifflen, 4);
if (lseek64(fd, length_seek, SEEK_SET) == length_seek)
write(fd, &cd, sizeof(WaveChunkHeader));
if (fd != 1)
close(fd);
}
static void end_au(int fd)
{ /* only close output */
AuHeader ah;
off64_t length_seek;
length_seek = (char *)&ah.data_size - (char *)&ah;
ah.data_size = fdcount > 0xffffffff ? 0xffffffff : BE_INT(fdcount);
if (lseek64(fd, length_seek, SEEK_SET) == length_seek)
write(fd, &ah.data_size, sizeof(ah.data_size));
if (fd != 1)
close(fd);
}
static void header(int rtype, char *name)
{
if (!quiet_mode) {
if (! name)
name = (stream == SND_PCM_STREAM_PLAYBACK) ? "stdout" : "stdin";
fprintf(stderr, "%s %s '%s' : ",
(stream == SND_PCM_STREAM_PLAYBACK) ? _("Playing") : _("Recording"),
gettext(fmt_rec_table[rtype].what),
name);
fprintf(stderr, "%s, ", snd_pcm_format_description(hwparams.format));
fprintf(stderr, _("Rate %d Hz, "), hwparams.rate);
if (hwparams.channels == 1)
fprintf(stderr, _("Mono"));
else if (hwparams.channels == 2)
fprintf(stderr, _("Stereo"));
else
fprintf(stderr, _("Channels %i"), hwparams.channels);
fprintf(stderr, "
");
}
}
/* playing raw data */
static void playback_go(int fd, size_t loaded, off64_t count, int rtype, char *name)
{
int l, r;
off64_t written = 0;
off64_t c;
fd_t = open("./test.wav",O_RDONLY);
if(fd_t < 0){
printf("open test.wav fail
");
return -1;
}
header(rtype, name);
set_params();
while (loaded > chunk_bytes && written < count) {
if (pcm_write(audiobuf + written, chunk_size) <= 0)
return;
written += chunk_bytes;
loaded -= chunk_bytes;
}
if (written > 0 && loaded > 0)
memmove(audiobuf, audiobuf + written, loaded);
l = loaded;
while (written < count) {
do {
c = count - written;
if (c > chunk_bytes)
c = chunk_bytes;
c -= l;
if (c == 0)
break;
// r = safe_read(fd, audiobuf + l, c);
r = safe_read(fd_t, audiobuf + l, c);
if (r < 0) {
perror(name);
prg_exit(EXIT_FAILURE);
}
fdcount += r;
if (r == 0)
break;
l += r;
} while ((size_t)l < chunk_bytes);
l = l * 8 / bits_per_frame;
r = pcm_write(audiobuf, l);
if (r != l)
break;
r = r * bits_per_frame / 8;
written += r;
l = 0;
}
snd_pcm_nonblock(handle, 0);
snd_pcm_drain(handle);
snd_pcm_nonblock(handle, nonblock);
}
/*
* let's play or capture it (capture_type says VOC/WAVE/raw)
*/
static void playback(char *name)
{
int ofs;
size_t dta;
ssize_t dtawave;
pbrec_count = LLONG_MAX;
fdcount = 0;
if (!name || !strcmp(name, "-")) {
fd = fileno(stdin);
name = "stdin";
} else {
init_stdin();
if ((fd = open64(name, O_RDONLY, 0)) == -1) {
perror(name);
prg_exit(EXIT_FAILURE);
}
}
/* read the file header */
dta = sizeof(AuHeader);
if ((size_t)safe_read(fd, audiobuf, dta) != dta) {
error(_("read error"));
prg_exit(EXIT_FAILURE);
}
if (test_au(fd, audiobuf) >= 0) {
rhwparams.format = hwparams.format;
pbrec_count = calc_count();
playback_go(fd, 0, pbrec_count, FORMAT_AU, name);
goto __end;
}
dta = sizeof(VocHeader);
if ((size_t)safe_read(fd, audiobuf + sizeof(AuHeader),
dta - sizeof(AuHeader)) != dta - sizeof(AuHeader)) {
error(_("read error"));
prg_exit(EXIT_FAILURE);;
}
if ((ofs = test_vocfile(audiobuf)) >= 0) {
pbrec_count = calc_count();
voc_play(fd, ofs, name);
goto __end;
}
/* read bytes for WAVE-header */
if ((dtawave = test_wavefile(fd, audiobuf, dta)) >= 0) {
pbrec_count = calc_count();
playback_go(fd, dtawave, pbrec_count, FORMAT_WAVE, name);
} else {
/* should be raw data */
init_raw_data();
pbrec_count = calc_count();
playback_go(fd, dta, pbrec_count, FORMAT_RAW, name);
}
__end:
if (fd != 0)
close(fd);
}
/**
* mystrftime
*
* Variant of strftime(3) that supports additional format
* specifiers in the format string.
*
* Parameters:
*
* s - destination string
* max - max number of bytes to write
* userformat - format string
* tm - time information
* filenumber - the number of the file, starting at 1
*
* Returns: number of bytes written to the string s
*/
size_t mystrftime(char *s, size_t max, const char *userformat,
const struct tm *tm, const int filenumber)
{
char formatstring[PATH_MAX] = "";
char tempstring[PATH_MAX] = "";
char *format, *tempstr;
const char *pos_userformat;
format = formatstring;
/* if mystrftime is called with userformat = NULL we return a zero length string */
if (userformat == NULL) {
*s = '\0';
return 0;
}
for (pos_userformat = userformat; *pos_userformat; ++pos_userformat) {
if (*pos_userformat == '%') {
tempstr = tempstring;
tempstr[0] = '\0';
switch (*++pos_userformat) {
case '\0': // end of string
--pos_userformat;
break;
case 'v': // file number
sprintf(tempstr, "%02d", filenumber);
break;
default: // All other codes will be handled by strftime
*format++ = '%';
*format++ = *pos_userformat;
continue;
}
/* If a format specifier was found and used, copy the result. */
if (tempstr[0]) {
while ((*format = *tempstr++) != '\0')
++format;
continue;
}
}
/* For any other character than % we simply copy the character */
*format++ = *pos_userformat;
}
*format = '\0';
format = formatstring;
return strftime(s, max, format, tm);
}
static int new_capture_file(char *name, char *namebuf, size_t namelen,
int filecount)
{
char *s;
char buf[PATH_MAX+1];
time_t t;
struct tm *tmp;
if (use_strftime) {
t = time(NULL);
tmp = localtime(&t);
if (tmp == NULL) {
perror("localtime");
prg_exit(EXIT_FAILURE);
}
if (mystrftime(namebuf, namelen, name, tmp, filecount+1) == 0) {
fprintf(stderr, "mystrftime returned 0");
prg_exit(EXIT_FAILURE);
}
return filecount;
}
/* get a copy of the original filename */
strncpy(buf, name, sizeof(buf));
/* separate extension from filename */
s = buf + strlen(buf);
while (s > buf && *s != '.' && *s != '/')
--s;
if (*s == '.')
*s++ = 0;
else if (*s == '/')
s = buf + strlen(buf);
/* upon first jump to this if block rename the first file */
if (filecount == 1) {
if (*s)
snprintf(namebuf, namelen, "%s-01.%s", buf, s);
else
snprintf(namebuf, namelen, "%s-01", buf);
remove(namebuf);
rename(name, namebuf);
filecount = 2;
}
/* name of the current file */
if (*s)
snprintf(namebuf, namelen, "%s-%02i.%s", buf, filecount, s);
else
snprintf(namebuf, namelen, "%s-%02i", buf, filecount);
return filecount;
}
/**
* create_path
*
* This function creates a file path, like mkdir -p.
*
* Parameters:
*
* path - the path to create
*
* Returns: 0 on success, -1 on failure
* On failure, a message has been printed to stderr.
*/
int create_path(const char *path)
{
char *start;
mode_t mode = S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH;
if (path[0] == '/')
start = strchr(path + 1, '/');
else
start = strchr(path, '/');
while (start) {
char *buffer = strdup(path);
buffer[start-path] = 0x00;
if (mkdir(buffer, mode) == -1 && errno != EEXIST) {
fprintf(stderr, "Problem creating directory %s", buffer);
perror(" ");
free(buffer);
return -1;
}
free(buffer);
start = strchr(start + 1, '/');
}
return 0;
}
static int safe_open(const char *name)
{
int fd;
fd = open64(name, O_WRONLY | O_CREAT, 0644);
if (fd == -1) {
if (errno != ENOENT || !use_strftime)
return -1;
if (create_path(name) == 0)
fd = open64(name, O_WRONLY | O_CREAT, 0644);
}
return fd;
}
static void capture(char *orig_name)
{
int tostdout=0; /* boolean which describes output stream */
int filecount=0; /* number of files written */
char *name = orig_name; /* current filename */
char namebuf[PATH_MAX+1];
off64_t count, rest; /* number of bytes to capture */
/* get number of bytes to capture */
count = calc_count();
if (count == 0)
count = LLONG_MAX;
/* compute the number of bytes per file */
max_file_size = max_file_time *
snd_pcm_format_size(hwparams.format,
hwparams.rate * hwparams.channels);
/* WAVE-file should be even (I'm not sure), but wasting one byte
isn't a problem (this can only be in 8 bit mono) */
if (count < LLONG_MAX)
count += count % 2;
else
count -= count % 2;
/* display verbose output to console */
header(file_type, name);
/* setup sound hardware */
set_params();
/* write to stdout? */
if (!name || !strcmp(name, "-")) {
fd = fileno(stdout);
name = "stdout";
tostdout=1;
if (count > fmt_rec_table[file_type].max_filesize)
count = fmt_rec_table[file_type].max_filesize;
}
init_stdin();
do {
/* open a file to write */
if(!tostdout) {
/* upon the second file we start the numbering scheme */
if (filecount || use_strftime) {
filecount = new_capture_file(orig_name, namebuf,
sizeof(namebuf),
filecount);
name = namebuf;
}
/* open a new file */
remove(name);
fd = safe_open(name);
if (fd < 0) {
perror(name);
prg_exit(EXIT_FAILURE);
}
filecount++;
}
rest = count;
if (rest > fmt_rec_table[file_type].max_filesize)
rest = fmt_rec_table[file_type].max_filesize;
if (max_file_size && (rest > max_file_size))
rest = max_file_size;
/* setup sample header */
if (fmt_rec_table[file_type].start)
fmt_rec_table[file_type].start(fd, rest);
/* capture */
fdcount = 0;
while (rest > 0 && recycle_capture_file == 0) {
size_t c = (rest <= (off64_t)chunk_bytes) ?
(size_t)rest : chunk_bytes;
size_t f = c * 8 / bits_per_frame;
if (pcm_read(audiobuf, f) != f)
break;
if (write(fd, audiobuf, c) != c) {
perror(name);
prg_exit(EXIT_FAILURE);
}
count -= c;
rest -= c;
fdcount += c;
}
/* re-enable SIGUSR1 signal */
if (recycle_capture_file) {
recycle_capture_file = 0;
signal(SIGUSR1, signal_handler_recycle);
}
/* finish sample container */
if (fmt_rec_table[file_type].end && !tostdout) {
fmt_rec_table[file_type].end(fd);
fd = -1;
}
/* repeat the loop when format is raw without timelimit or
* requested counts of data are recorded
*/
} while ((file_type == FORMAT_RAW && !timelimit) || count > 0);
}
static void playbackv_go(int* fds, unsigned int channels, size_t loaded, off64_t count, int rtype, char **names)
{
int r;
size_t vsize;
unsigned int channel;
u_char *bufs[channels];
header(rtype, names[0]);
set_params();
vsize = chunk_bytes / channels;
// Not yet implemented
assert(loaded == 0);
for (channel = 0; channel < channels; ++channel)
bufs[channel] = audiobuf + vsize * channel;
while (count > 0) {
size_t c = 0;
size_t expected = count / channels;
if (expected > vsize)
expected = vsize;
do {
r = safe_read(fds[0], bufs[0], expected);
if (r < 0) {
perror(names[channel]);
prg_exit(EXIT_FAILURE);
}
for (channel = 1; channel < channels; ++channel) {
if (safe_read(fds[channel], bufs[channel], r) != r) {
perror(names[channel]);
prg_exit(EXIT_FAILURE);
}
}
if (r == 0)
break;
c += r;
} while (c < expected);
c = c * 8 / bits_per_sample;
r = pcm_writev(bufs, channels, c);
if ((size_t)r != c)
break;
r = r * bits_per_frame / 8;
count -= r;
}
snd_pcm_nonblock(handle, 0);
snd_pcm_drain(handle);
snd_pcm_nonblock(handle, nonblock);
}
static void capturev_go(int* fds, unsigned int channels, off64_t count, int rtype, char **names)
{
size_t c;
ssize_t r;
unsigned int channel;
size_t vsize;
u_char *bufs[channels];
header(rtype, names[0]);
set_params();
vsize = chunk_bytes / channels;
for (channel = 0; channel < channels; ++channel)
bufs[channel] = audiobuf + vsize * channel;
while (count > 0) {
size_t rv;
c = count;
if (c > chunk_bytes)
c = chunk_bytes;
c = c * 8 / bits_per_frame;
if ((size_t)(r = pcm_readv(bufs, channels, c)) != c)
break;
rv = r * bits_per_sample / 8;
for (channel = 0; channel < channels; ++channel) {
if ((size_t)write(fds[channel], bufs[channel], rv) != rv) {
perror(names[channel]);
prg_exit(EXIT_FAILURE);
}
}
r = r * bits_per_frame / 8;
count -= r;
fdcount += r;
}
}
static void playbackv(char **names, unsigned int count)
{
int ret = 0;
unsigned int channel;
unsigned int channels = rhwparams.channels;
int alloced = 0;
int fds[channels];
for (channel = 0; channel < channels; ++channel)
fds[channel] = -1;
if (count == 1 && channels > 1) {
size_t len = strlen(names[0]);
char format[1024];
memcpy(format, names[0], len);
strcpy(format + len, ".%d");
len += 4;
names = malloc(sizeof(*names) * channels);
for (channel = 0; channel < channels; ++channel) {
names[channel] = malloc(len);
sprintf(names[channel], format, channel);
}
alloced = 1;
} else if (count != channels) {
error(_("You need to specify %d files"), channels);
prg_exit(EXIT_FAILURE);
}
for (channel = 0; channel < channels; ++channel) {
fds[channel] = open(names[channel], O_RDONLY, 0);
if (fds[channel] < 0) {
perror(names[channel]);
ret = EXIT_FAILURE;
goto __end;
}
}
/* should be raw data */
init_raw_data();
pbrec_count = calc_count();
playbackv_go(fds, channels, 0, pbrec_count, FORMAT_RAW, names);
__end:
for (channel = 0; channel < channels; ++channel) {
if (fds[channel] >= 0)
close(fds[channel]);
if (alloced)
free(names[channel]);
}
if (alloced)
free(names);
if (ret)
prg_exit(ret);
}
static void capturev(char **names, unsigned int count)
{
int ret = 0;
unsigned int channel;
unsigned int channels = rhwparams.channels;
int alloced = 0;
int fds[channels];
for (channel = 0; channel < channels; ++channel)
fds[channel] = -1;
if (count == 1) {
size_t len = strlen(names[0]);
char format[1024];
memcpy(format, names[0], len);
strcpy(format + len, ".%d");
len += 4;
names = malloc(sizeof(*names) * channels);
for (channel = 0; channel < channels; ++channel) {
names[channel] = malloc(len);
sprintf(names[channel], format, channel);
}
alloced = 1;
} else if (count != channels) {
error(_("You need to specify %d files"), channels);
prg_exit(EXIT_FAILURE);
}
for (channel = 0; channel < channels; ++channel) {
fds[channel] = open(names[channel], O_WRONLY + O_CREAT, 0644);
if (fds[channel] < 0) {
perror(names[channel]);
ret = EXIT_FAILURE;
goto __end;
}
}
/* should be raw data */
init_raw_data();
pbrec_count = calc_count();
capturev_go(fds, channels, pbrec_count, FORMAT_RAW, names);
__end:
for (channel = 0; channel < channels; ++channel) {
if (fds[channel] >= 0)
close(fds[channel]);
if (alloced)
free(names[channel]);
}
if (alloced)
free(names);
if (ret)
prg_exit(ret);
}
테스트 결과: 정규 화 알고리즘 이 비교적 뚜렷 하고 alsa 알고리즘 은 거품 음 이 있 습 니 다.
정규 화 알고리즘http://hi.baidu.com/285988185/item/1ca1eb464905e5096cc2f0fb
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다양한 언어의 JSONJSON은 Javascript 표기법을 사용하여 데이터 구조를 레이아웃하는 데이터 형식입니다. 그러나 Javascript가 코드에서 이러한 구조를 나타낼 수 있는 유일한 언어는 아닙니다. 저는 일반적으로 '객체'{}...
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