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alsa-utils/aplay/aplay.c
Abramo Bagnara 5f542e20aa More relaxed strategy
2000-12-04 10:08:30 +00:00

1776 lines
44 KiB
C
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/*
* aplay.c - plays and records
*
* CREATIVE LABS CHANNEL-files
* Microsoft WAVE-files
* SPARC AUDIO .AU-files
* Raw Data
*
* Copyright (c) by Jaroslav Kysela <perex@suse.cz>
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#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 <sys/asoundlib.h>
#include <assert.h>
#include <sys/poll.h>
#include <sys/uio.h>
#include "aconfig.h"
#include "formats.h"
#include "version.h"
#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 ssize_t (*readi_func)(snd_pcm_t *handle, void *buffer, size_t size);
static ssize_t (*writei_func)(snd_pcm_t *handle, const void *buffer, size_t size);
static ssize_t (*readn_func)(snd_pcm_t *handle, void **bufs, size_t size);
static ssize_t (*writen_func)(snd_pcm_t *handle, void **bufs, size_t size);
static char *command;
static snd_pcm_t *handle;
static snd_pcm_info_t info;
static snd_pcm_hw_params_t hwparams, rhwparams;
static snd_pcm_sw_params_t swparams;
static int timelimit = 0;
static int quiet_mode = 0;
static int file_type = FORMAT_DEFAULT;
static int xrun_mode = SND_PCM_XRUN_FRAGMENT;
static int ready_mode = SND_PCM_READY_FRAGMENT;
static int open_mode = 0;
static int stream = SND_PCM_STREAM_PLAYBACK;
static int mmap_flag = 0;
static int interleaved = 1;
static int nonblock = 0;
static char *audiobuf = NULL;
static int buffer_size = -1;
static int frag_length = 125;
static int buffer_length = 500;
static int avail_min = 50;
static int xfer_min = 50;
static int verbose = 0;
static int buffer_pos = 0;
static size_t bits_per_sample, bits_per_frame;
static size_t buffer_bytes;
int digital = SND_PCM_DIG_NONE;
static int count;
static int vocmajor, vocminor;
/* needed prototypes */
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);
struct fmt_capture {
void (*start) (int fd, size_t count);
void (*end) (int fd);
char *what;
} fmt_rec_table[] = {
{ NULL, end_wave, "raw data" },
{ begin_voc, end_voc, "VOC" },
{ begin_wave, end_wave, "WAVE" },
{ begin_au, end_wave, "Sparc Audio" }
};
#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 95)
#define error(...) do {\
fprintf(stderr, "%s: %s:%d: ", command, __FUNCTION__, __LINE__); \
fprintf(stderr, __VA_ARGS__); \
putc('\n', stderr); \
} while (0)
#else
#define error(args...) do {\
fprintf(stderr, "%s: %s:%d: ", command, __FUNCTION__, __LINE__); \
fprintf(stderr, ##args); \
putc('\n', stderr); \
} while (0)
#endif
static void usage(char *command)
{
int k;
fprintf(stderr, "\
Usage: %s [OPTION]... [FILE]...
--help help
--version print current version
-l, --list-devices list all soundcards and digital audio devices
-L, --list-pcms list all PCMs defined
-D, --device=NAME select PCM by name
-q, --quiet quiet mode
-t, --file-type TYPE file type (voc, wav or raw)
-c, --channels=# channels
-f, --format=FORMAT sample format (case insensitive)
-r, --rate=# sample rate
-d, --duration=# interrupt after # seconds
-e, --frame-mode use frame mode instead of default fragment mode
-M, --mmap mmap stream
-N, --nonblock nonblocking mode
-F, --fragment-length=# fragment length is # milliseconds
-B, --buffer-length=# buffer length is # milliseconds
-A, --avail-min=# min available space for wakeup is # milliseconds
-X, --xfer-min=# min xfer size is # milliseconds
-v, --verbose show PCM structure and setup
-I, --separate-channels one file for each channel
-P, --iec958p AES IEC958 professional
-C, --iec958c AES IEC958 consumer
", command);
fprintf(stderr, "Recognized sample formats are:");
for (k = 0; k < 32; ++k) {
const char *s = snd_pcm_format_name(k);
if (s)
fprintf(stderr, " %s", s);
}
fprintf(stderr, "\nSome of these may not be available on selected hardware\n");
fprintf(stderr, "The availabled format shortcuts are:\n");
fprintf(stderr, "cd (16 bit little endian, 44100, stereo)\n");
fprintf(stderr, "dat (16 bit little endian, 48000, stereo)\n");
}
static void device_list(void)
{
snd_ctl_t *handle;
int card, err, dev, idx;
snd_ctl_hw_info_t info;
snd_pcm_info_t pcminfo;
card = -1;
if (snd_card_next(&card) < 0 || card < 0) {
error("no soundcards found...");
return;
}
while (card >= 0) {
char name[32];
sprintf(name, "hw:%d", card);
if ((err = snd_ctl_open(&handle, name)) < 0) {
error("control open (%i): %s", card, snd_strerror(err));
continue;
}
if ((err = snd_ctl_hw_info(handle, &info)) < 0) {
error("control hardware info (%i): %s", card, snd_strerror(err));
snd_ctl_close(handle);
continue;
}
dev = -1;
while (1) {
if (snd_ctl_pcm_next_device(handle, &dev)<0)
error("snd_ctl_pcm_next_device");
if (dev < 0)
break;
pcminfo.device = dev;
pcminfo.stream = -stream - 1;
pcminfo.subdevice = -1;
if ((err = snd_ctl_pcm_info(handle, &pcminfo)) < 0) {
error("control digital audio info (%i): %s", card, snd_strerror(err));
continue;
}
if (pcminfo.stream != stream)
continue;
fprintf(stderr, "%s: %i [%s] / #%i: %s\n",
info.name,
card + 1,
info.id,
dev,
pcminfo.name);
fprintf(stderr, " Subdevices: %i/%i\n", pcminfo.subdevices_avail, pcminfo.subdevices_count);
for (idx = 0; idx < pcminfo.subdevices_count; idx++) {
pcminfo.subdevice = idx;
if ((err = snd_ctl_pcm_info(handle, &pcminfo)) < 0) {
error("control digital audio playback info (%i): %s", card, snd_strerror(err));
} else {
fprintf(stderr, " Subdevice #%i: %s\n", idx, pcminfo.subname);
}
}
}
snd_ctl_close(handle);
if (snd_card_next(&card) < 0) {
error("snd_card_next");
break;
}
}
}
static void pcm_list(void)
{
snd_config_t *conf;
int err = snd_config_update();
if (err < 0)
error("snd_pcm_update: %s", snd_strerror(err));
err = snd_config_search(snd_config, "pcm", &conf);
if (err < 0)
return;
fprintf(stderr, "PCM list:");
snd_config_save(conf, stderr);
}
static void version(void)
{
fprintf(stderr, "%s: version " SND_UTIL_VERSION_STR " by Jaroslav Kysela <perex@suse.cz>", command);
}
#define OPT_HELP 1
#define OPT_VERSION 2
int main(int argc, char *argv[])
{
int option_index;
char *short_options = "lLD:qt:c:f:r:d:eMNF:A:X:B:vIPC";
static struct option long_options[] = {
{"help", 0, 0, OPT_HELP},
{"version", 0, 0, OPT_VERSION},
{"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'},
{"asap-mode", 0, 0, 'e'},
{"mmap", 0, 0, 'M'},
{"nonblock", 0, 0, 'N'},
{"fragment-length", 1, 0, 'F'},
{"avail-min", 1, 0, 'A'},
{"xfer-min", 1, 0, 'X'},
{"buffer-length", 1, 0, 'B'},
{"verbose", 0, 0, 'v'},
{"iec958c", 0, 0, 'C'},
{"iec958p", 0, 0, 'P'},
{"separate-channels", 0, 0, 'I'},
{0, 0, 0, 0}
};
char *pcm_name = "hw:0,0";
int tmp, err, c;
command = argv[0];
file_type = FORMAT_DEFAULT;
if (strstr(argv[0], "arecord")) {
stream = SND_PCM_STREAM_CAPTURE;
file_type = FORMAT_WAVE;
command = "arecord";
} 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;
}
buffer_size = -1;
rhwparams.format = SND_PCM_FORMAT_U8;
rhwparams.rate = DEFAULT_SPEED;
rhwparams.channels = 1;
while ((c = getopt_long(argc, argv, short_options, long_options, &option_index)) != -1) {
switch (c) {
case OPT_HELP:
usage(command);
return 0;
case OPT_VERSION:
version();
return 0;
case 'l':
device_list();
return 0;
case 'L':
pcm_list();
return 0;
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 {
error("unrecognized file format %s", optarg);
return 1;
}
break;
case 'c':
rhwparams.channels = atoi(optarg);
if (rhwparams.channels < 1 || rhwparams.channels > 32) {
error("value %i for channels is invalid", rhwparams.channels);
return 1;
}
break;
case 'f':
if (strcasecmp(optarg, "cd") == 0) {
rhwparams.format = SND_PCM_FORMAT_S16_LE;
rhwparams.rate = 44100;
rhwparams.channels = 2;
} else if (strcasecmp(optarg, "dat") == 0) {
rhwparams.format = SND_PCM_FORMAT_S16_LE;
rhwparams.rate = 48000;
rhwparams.channels = 2;
} else {
rhwparams.format = snd_pcm_format_value(optarg);
if (rhwparams.format < 0) {
error("wrong extended format '%s'", optarg);
exit(EXIT_FAILURE);
}
}
break;
case 'r':
tmp = atoi(optarg);
if (tmp < 300)
tmp *= 1000;
rhwparams.rate = tmp;
if (tmp < 2000 || tmp > 128000) {
error("bad speed value %i", tmp);
return 1;
}
break;
case 'd':
timelimit = atoi(optarg);
break;
case 'e':
xrun_mode = SND_PCM_XRUN_ASAP;
ready_mode = SND_PCM_READY_ASAP;
break;
case 'N':
nonblock = 1;
open_mode |= SND_PCM_NONBLOCK;
break;
case 'F':
frag_length = atoi(optarg);
break;
case 'B':
buffer_length = atoi(optarg);
break;
case 'A':
avail_min = atoi(optarg);
break;
case 'X':
xfer_min = atoi(optarg);
break;
case 'v':
verbose = 1;
break;
case 'M':
mmap_flag = 1;
break;
case 'I':
interleaved = 0;
break;
case 'C':
digital = SND_PCM_DIG_AES_IEC958C;
break;
case 'P':
digital = SND_PCM_DIG_AES_IEC958P;
break;
default:
fprintf(stderr, "Try `%s --help' for more information.\n", command);
return 1;
}
}
err = snd_pcm_open(&handle, pcm_name, stream, open_mode);
if (err < 0) {
error("audio open error: %s", snd_strerror(err));
return 1;
}
if (digital != SND_PCM_DIG_NONE) {
snd_pcm_dig_params_t dig;
memset(&dig, 0, sizeof(dig));
dig.group = 0;
dig.val.aes.status[0] = SND_PCM_AES0_NONAUDIO;
dig.type = digital;
switch (digital) {
case SND_PCM_DIG_AES_IEC958P:
dig.val.aes.status[0] |= SND_PCM_AES0_PROFESSIONAL;
dig.val.aes.status[0] |= SND_PCM_AES0_PRO_FS_48000;
break;
case SND_PCM_DIG_AES_IEC958C:
dig.type = SND_PCM_DIG_AES_IEC958C;
dig.val.aes.status[3] |= SND_PCM_AES3_CON_FS_48000;
break;
}
err = snd_pcm_dig_params(handle, &dig);
if (err < 0) {
error("dig_params setting 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;
}
}
memset(&info, 0, sizeof(info));
if ((err = snd_pcm_info(handle, &info)) < 0) {
error("info error: %s", snd_strerror(err));
return 1;
}
buffer_size = 1024;
hwparams = rhwparams;
audiobuf = (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 (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);
}
snd_pcm_close(handle);
free(audiobuf);
return EXIT_SUCCESS;
}
/*
* Safe read (for pipes)
*/
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;
(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 (strstr(vp->magic, VOC_MAGIC_STRING)) {
vocminor = vp->version & 0xFF;
vocmajor = vp->version / 256;
if (vp->version != (0x1233 - vp->coded_ver))
return -2; /* coded version mismatch */
return vp->headerlen - sizeof(VocHeader); /* 0 mostly */
}
return -1; /* magic string fail */
}
/*
* helper for test_wavefile
*/
size_t test_wavefile_read(int fd, char *buffer, size_t *size, size_t reqsize, int line)
{
if (*size >= reqsize)
return *size;
if (safe_read(fd, buffer + *size, reqsize - *size) != reqsize - *size) {
error("read error (called from line %i)", line);
exit(EXIT_FAILURE);
}
return *size = reqsize;
}
/*
* 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, char *buffer, size_t size)
{
WaveHeader *h = (WaveHeader *)buffer;
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))
memmove(buffer, buffer + sizeof(WaveHeader), size - sizeof(WaveHeader));
size -= sizeof(WaveHeader);
while (1) {
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_FMT)
break;
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));
exit(EXIT_FAILURE);
}
test_wavefile_read(fd, buffer, &size, len, __LINE__);
f = (WaveFmtBody*) buffer;
if (LE_SHORT(f->format) != WAV_PCM_CODE) {
error("can't play not PCM-coded WAVE-files");
exit(EXIT_FAILURE);
}
if (LE_SHORT(f->modus) < 1) {
error("can't play WAVE-files with %d tracks", LE_SHORT(f->modus));
exit(EXIT_FAILURE);
}
hwparams.channels = LE_SHORT(f->modus);
switch (LE_SHORT(f->bit_p_spl)) {
case 8:
hwparams.format = SND_PCM_FORMAT_U8;
break;
case 16:
hwparams.format = SND_PCM_FORMAT_S16_LE;
break;
default:
error(" can't play WAVE-files with sample %d bits wide", LE_SHORT(f->bit_p_spl));
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;
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 < count)
count = len;
return size;
}
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;
count = BE_INT(ap->data_size);
switch (BE_INT(ap->encoding)) {
case AU_FMT_ULAW:
hwparams.format = SND_PCM_FORMAT_MU_LAW;
break;
case AU_FMT_LIN8:
hwparams.format = SND_PCM_FORMAT_U8;
break;
case AU_FMT_LIN16:
hwparams.format = SND_PCM_FORMAT_U16_LE;
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 > 128)
return -1;
if (safe_read(fd, buffer + sizeof(AuHeader), BE_INT(ap->hdr_size) - sizeof(AuHeader)) != BE_INT(ap->hdr_size) - sizeof(AuHeader)) {
error("read error");
exit(EXIT_FAILURE);
}
return 0;
}
static void set_params(void)
{
snd_pcm_hw_info_t info;
snd_pcm_strategy_t *strategy;
size_t bufsize;
int err;
snd_pcm_hw_info_any(&info);
if (mmap_flag)
info.access_mask = SND_PCM_ACCBIT_MMAP;
else if (interleaved)
info.access_mask = SND_PCM_ACCBIT_RW_INTERLEAVED;
else
info.access_mask = SND_PCM_ACCBIT_RW_NONINTERLEAVED;
info.format_mask = 1 << hwparams.format;
info.channels_min = info.channels_max = hwparams.channels;
info.fragments_min = 2;
err = snd_pcm_strategy_simple(&strategy, 1000000, 2000000);
assert(err >= 0);
err = snd_pcm_strategy_simple_near(strategy, 0, SND_PCM_HW_PARAM_RATE,
hwparams.rate, 10);
assert(err >= 0);
err = snd_pcm_strategy_simple_near(strategy, 1, SND_PCM_HW_PARAM_FRAGMENT_SIZE,
hwparams.rate * frag_length / 1000, 1);
assert(err >= 0);
err = snd_pcm_strategy_simple_near(strategy, 2, SND_PCM_HW_PARAM_BUFFER_SIZE,
hwparams.rate * buffer_length / 1000, 1);
assert(err >= 0);
err = snd_pcm_hw_info_strategy(handle, &info, strategy);
snd_pcm_strategy_free(strategy);
if (err < 0) {
fprintf(stderr, "Unable to find params combination:\n");
err = snd_pcm_hw_info_try_explain_failure(handle, &info, NULL, 2, stderr);
if (err < 0) {
fprintf(stderr, "No explaination found for this failure\n");
}
exit(EXIT_FAILURE);
}
err = snd_pcm_hw_params_info(handle, &hwparams, &info);
if (err < 0) {
snd_pcm_dump_hw_params_fail(&hwparams, stderr);
error("unable to set hw params");
exit(EXIT_FAILURE);
}
bufsize = hwparams.fragment_size * hwparams.fragments;
swparams.start_mode = SND_PCM_START_DATA;
swparams.ready_mode = ready_mode;
swparams.xrun_mode = xrun_mode;
swparams.avail_min = hwparams.rate * avail_min / 1000;
swparams.xfer_min = hwparams.rate * xfer_min / 1000;
if (xrun_mode == SND_PCM_XRUN_FRAGMENT)
swparams.xfer_align = hwparams.fragment_size;
else
swparams.xfer_align = 1;
swparams.xfer_min -= swparams.xfer_min % swparams.xfer_align;
swparams.avail_min -= swparams.avail_min % swparams.xfer_align;
if (swparams.xfer_min == 0)
swparams.xfer_min = swparams.xfer_align;
else if (swparams.xfer_min >= bufsize)
swparams.xfer_min = bufsize - swparams.xfer_align;
if (swparams.avail_min == 0)
swparams.avail_min = swparams.xfer_align;
else if (swparams.avail_min >= bufsize)
swparams.avail_min = bufsize - swparams.xfer_align;
swparams.time = 0;
if (snd_pcm_sw_params(handle, &swparams) < 0) {
snd_pcm_dump_sw_params_fail(&swparams, stderr);
error("unable to set sw params");
exit(EXIT_FAILURE);
}
if (snd_pcm_prepare(handle) < 0) {
error("unable to prepare PCM");
exit(EXIT_FAILURE);
}
if (verbose)
snd_pcm_dump(handle, stderr);
buffer_size = hwparams.fragment_size;
bits_per_sample = snd_pcm_format_physical_width(hwparams.format);
bits_per_frame = bits_per_sample * hwparams.channels;
buffer_bytes = buffer_size * bits_per_frame / 8;
audiobuf = realloc(audiobuf, buffer_bytes);
if (audiobuf == NULL) {
error("not enough memory");
exit(EXIT_FAILURE);
}
// fprintf(stderr, "real buffer_size = %i, frags = %i, total = %i\n", buffer_size, setup.buf.block.frags, setup.buf.block.frags * buffer_size);
}
/* playback write error hander */
void xrun(void)
{
snd_pcm_status_t status;
int res;
memset(&status, 0, sizeof(status));
if ((res = snd_pcm_status(handle, &status))<0) {
error("status error: %s", snd_strerror(res));
exit(EXIT_FAILURE);
}
if (status.state == SND_PCM_STATE_XRUN) {
struct timeval now, diff;
gettimeofday(&now, 0);
timersub(&now, &status.trigger_time, &diff);
fprintf(stderr, "xrun!!! (at least %.3f ms long)\n", diff.tv_sec * 1000 + diff.tv_usec / 1000.0);
if (verbose) {
fprintf(stderr, "Status:\n");
snd_pcm_dump_status(&status, stderr);
}
if ((res = snd_pcm_prepare(handle))<0) {
error("xrun: prepare error: %s", snd_strerror(res));
exit(EXIT_FAILURE);
}
return; /* ok, data should be accepted again */
}
error("read/write error");
exit(EXIT_FAILURE);
}
/*
* write function
*/
static ssize_t pcm_write(u_char *data, size_t count)
{
ssize_t r;
ssize_t result = 0;
if (xrun_mode == SND_PCM_XRUN_FRAGMENT &&
count < buffer_size) {
snd_pcm_format_set_silence(hwparams.format, data + count * bits_per_frame / 8, (buffer_size - count) * hwparams.channels);
count = buffer_size;
}
while (count > 0) {
r = writei_func(handle, data, count);
if (r == -EAGAIN || (r >= 0 && r < count)) {
snd_pcm_wait(handle, 1000);
} else if (r == -EPIPE) {
xrun();
} else if (r < 0) {
error("write error: %s", snd_strerror(r));
exit(EXIT_FAILURE);
}
if (r > 0) {
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 (xrun_mode == SND_PCM_XRUN_FRAGMENT &&
count != buffer_size) {
unsigned int channel;
size_t offset = count;
size_t remaining = buffer_size - count;
for (channel = 0; channel < channels; channel++)
snd_pcm_format_set_silence(hwparams.format, data[channel] + offset * bits_per_sample / 8, remaining);
count = buffer_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;
r = writen_func(handle, bufs, count);
if (r == -EAGAIN || (r >= 0 && r < count)) {
snd_pcm_wait(handle, 1000);
} else if (r == -EPIPE) {
xrun();
} else if (r < 0) {
error("writev error: %s", snd_strerror(r));
exit(EXIT_FAILURE);
}
if (r > 0) {
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 (xrun_mode == SND_PCM_XRUN_FRAGMENT &&
count != buffer_size) {
count = buffer_size;
}
while (count > 0) {
r = readi_func(handle, data, count);
if (r == -EAGAIN || (r >= 0 && r < count)) {
snd_pcm_wait(handle, 1000);
} else if (r == -EPIPE) {
xrun();
} else if (r < 0) {
error("read error: %s", snd_strerror(r));
exit(EXIT_FAILURE);
}
if (r > 0) {
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 (xrun_mode == SND_PCM_XRUN_FRAGMENT &&
count != buffer_size) {
count = buffer_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;
r = readn_func(handle, bufs, count);
if (r == -EAGAIN || (r >= 0 && r < count)) {
snd_pcm_wait(handle, 1000);
} else if (r == -EPIPE) {
xrun();
} else if (r < 0) {
error("readv error: %s", snd_strerror(r));
exit(EXIT_FAILURE);
}
if (r > 0) {
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 > buffer_bytes - buffer_pos)
size = buffer_bytes - buffer_pos;
memcpy(audiobuf + buffer_pos, data, size);
data += size;
count -= size;
buffer_pos += size;
if (buffer_pos == buffer_bytes) {
if ((r = pcm_write(audiobuf, buffer_size)) != buffer_size)
return r;
buffer_pos = 0;
}
}
return result;
}
static void voc_write_silence(unsigned x)
{
unsigned l;
char *buf;
buf = (char *) malloc(buffer_bytes);
if (buf == NULL) {
error("can't allocate buffer for silence");
return; /* not fatal error */
}
snd_pcm_format_set_silence(hwparams.format, buf, buffer_size * hwparams.channels);
while (x > 0) {
l = x;
if (l > buffer_size)
l = buffer_size;
if (voc_pcm_write(buf, l) != l) {
error("write error");
exit(EXIT_FAILURE);
}
x -= l;
}
}
static void voc_pcm_flush(void)
{
if (buffer_pos > 0) {
size_t b;
if (xrun_mode == SND_PCM_XRUN_FRAGMENT) {
if (snd_pcm_format_set_silence(hwparams.format, audiobuf + buffer_pos, buffer_bytes - buffer_pos * 8 / bits_per_sample) < 0)
fprintf(stderr, "voc_pcm_flush - silence error");
b = buffer_size;
} else {
b = buffer_pos * 8 / bits_per_frame;
}
if (pcm_write(audiobuf, b) != b)
error("voc_pcm_flush error");
}
snd_pcm_drain(handle);
}
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;
int 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");
exit(EXIT_FAILURE);
}
if (!quiet_mode) {
fprintf(stderr, "Playing Creative Labs Channel file '%s'...\n", name);
}
/* first we waste the rest of header, ugly but we don't need seek */
while (ofs > buffer_bytes) {
if (safe_read(fd, buf, buffer_bytes) != buffer_bytes) {
error("read error");
exit(EXIT_FAILURE);
}
ofs -= buffer_bytes;
}
if (ofs) {
if (safe_read(fd, buf, ofs) != ofs) {
error("read error");
exit(EXIT_FAILURE);
}
}
hwparams.format = SND_PCM_FORMAT_U8;
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, buffer_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);
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, "\n"); /* write /n after ASCII-out */
output = 0;
switch (bp->type) {
case 0:
#if 0
d_printf("Terminator\n");
#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\n", 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\n");
#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\n", (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\n", *sp);
#endif
break;
case 5: /* ASCII text, we copy to stderr */
output = 1;
#if 0
d_printf("ASCII - text :\n");
#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\n", repeat);
#endif
if (filepos >= 0) { /* if < 0, one seek fails, why test another */
if ((filepos = lseek(fd, 0, 1)) < 0) {
error("can't play loops; %s isn't seekable\n", 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\n", repeat);
#endif
--repeat;
}
#if 0
else
d_printf("Neverending loop\n");
#endif
lseek(fd, filepos, 0);
in_buffer = 0; /* clear the buffer */
goto Fill_the_buffer;
}
#if 0
else
d_printf("End repeat loop\n");
#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\n",
(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 < l)
l = nextblock;
if (l) {
if (output && !quiet_mode) {
if (write(2, data, l) != l) { /* to stderr */
error("write error");
exit(EXIT_FAILURE);
}
} else {
if (voc_pcm_write(data, l) != l) {
error("write error");
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 size_t calc_count(void)
{
size_t count;
if (!timelimit) {
count = 0x7fffffff;
} else {
count = snd_pcm_format_size(hwparams.format,
timelimit * hwparams.rate *
hwparams.channels);
}
return count;
}
/* write a .VOC-header */
static void begin_voc(int fd, size_t cnt)
{
VocHeader vh;
VocBlockType bt;
VocVoiceData vd;
VocExtBlock eb;
strncpy(vh.magic, VOC_MAGIC_STRING, 20);
vh.magic[19] = 0x1A;
vh.headerlen = sizeof(VocHeader);
vh.version = VOC_ACTUAL_VERSION;
vh.coded_ver = 0x1233 - VOC_ACTUAL_VERSION;
if (write(fd, &vh, sizeof(VocHeader)) != sizeof(VocHeader)) {
error("write error");
exit(EXIT_FAILURE);
}
if (hwparams.channels > 1) {
/* write a 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");
exit(EXIT_FAILURE);
}
eb.tc = (u_short) (65536 - 256000000L / (hwparams.rate << 1));
eb.pack = 0;
eb.mode = 1;
if (write(fd, &eb, sizeof(VocExtBlock)) != sizeof(VocExtBlock)) {
error("write error");
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");
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");
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;
bits = 8;
switch (hwparams.format) {
case SND_PCM_FORMAT_U8:
bits = 8;
break;
case SND_PCM_FORMAT_S16_LE:
bits = 16;
break;
default:
error("Wave doesn't support %s format...", snd_pcm_format_name(hwparams.format));
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);
f.format = LE_INT(WAV_PCM_CODE);
f.modus = 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);
tmp2 = dsp_speed * hwparams.channels * tmp2;
f.byte_p_sec = LE_SHORT(tmp2);
#else
tmp2 = hwparams.channels * ((bits + 7) / 8);
f.byte_p_spl = LE_SHORT(tmp2);
tmp2 = tmp2 * hwparams.rate;
f.byte_p_sec = LE_SHORT(tmp2);
#endif
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");
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 (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_LE:
ah.encoding = BE_INT(AU_FMT_LIN16);
break;
default:
error("Sparc Audio doesn't support %s format...", snd_pcm_format_name(hwparams.format));
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");
exit(EXIT_FAILURE);
}
}
/* closing .VOC */
static void end_voc(int fd)
{
char dummy = 0; /* Write a Terminator */
if (write(fd, &dummy, 1) != 1) {
error("write error");
exit(EXIT_FAILURE);
}
if (fd != 1)
close(fd);
}
static void end_wave(int fd)
{ /* only close output */
if (fd != 1)
close(fd);
}
static void header(int rtype, char *name)
{
if (!quiet_mode) {
fprintf(stderr, "%s %s '%s' : ",
(stream == SND_PCM_STREAM_PLAYBACK) ? "Playing" : "Recording",
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, "\n");
}
}
/* playing raw data */
void playback_go(int fd, size_t loaded, size_t count, int rtype, char *name)
{
int l, r;
size_t written = 0;
size_t c;
header(rtype, name);
set_params();
while (loaded > buffer_bytes && written < count) {
if (pcm_write(audiobuf + written, buffer_size) <= 0)
return;
written += buffer_bytes;
loaded -= buffer_bytes;
}
if (written > 0 && loaded > 0)
memmove(audiobuf, audiobuf + written, loaded);
l = loaded;
while (written < count) {
do {
c = count - written;
if (c > buffer_bytes)
c = buffer_bytes;
c -= l;
if (c == 0)
break;
r = safe_read(fd, audiobuf + l, c);
if (r < 0) {
perror(name);
exit(EXIT_FAILURE);
}
if (r == 0)
break;
l += r;
} while (xrun_mode != SND_PCM_XRUN_ASAP && l < buffer_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_drain(handle);
}
/* captureing raw data, this proc handels WAVE files and .VOCs (as one block) */
void capture_go(int fd, size_t count, int rtype, char *name)
{
size_t c;
ssize_t r;
header(rtype, name);
set_params();
while (count > 0) {
c = count;
if (c > buffer_bytes)
c = buffer_bytes;
c = c * 8 / bits_per_frame;
if ((r = pcm_read(audiobuf, c)) != c)
break;
r = r * bits_per_frame / 8;
if (write(fd, audiobuf, r) != r) {
perror(name);
exit(EXIT_FAILURE);
}
count -= r;
}
}
/*
* let's play or capture it (capture_type says VOC/WAVE/raw)
*/
static void playback(char *name)
{
int fd, ofs;
size_t dta;
ssize_t dtawave;
count = calc_count();
if (!name || !strcmp(name, "-")) {
fd = 0;
name = "stdin";
} else {
if ((fd = open(name, O_RDONLY, 0)) == -1) {
perror(name);
exit(EXIT_FAILURE);
}
}
/* read the file header */
dta = sizeof(AuHeader);
if (safe_read(fd, audiobuf, dta) != dta) {
error("read error");
exit(EXIT_FAILURE);
}
if (test_au(fd, audiobuf) >= 0) {
rhwparams.format = SND_PCM_FORMAT_MU_LAW;
playback_go(fd, 0, count, FORMAT_AU, name);
goto __end;
}
dta = sizeof(VocHeader);
if (safe_read(fd, audiobuf + sizeof(AuHeader),
dta - sizeof(AuHeader)) != dta - sizeof(AuHeader)) {
error("read error");
exit(EXIT_FAILURE);
}
if ((ofs = test_vocfile(audiobuf)) >= 0) {
voc_play(fd, ofs, name);
goto __end;
}
/* read bytes for WAVE-header */
if ((dtawave = test_wavefile(fd, audiobuf, dta)) >= 0) {
playback_go(fd, dtawave, count, FORMAT_WAVE, name);
} else {
/* should be raw data */
init_raw_data();
playback_go(fd, dta, count, FORMAT_RAW, name);
}
__end:
if (fd != 0)
close(fd);
}
static void capture(char *name)
{
int fd;
if (!name || !strcmp(name, "-")) {
fd = 1;
name = "stdout";
} else {
remove(name);
if ((fd = open(name, O_WRONLY | O_CREAT, 0644)) == -1) {
perror(name);
exit(EXIT_FAILURE);
}
}
count = calc_count();
count += count % 2;
/* 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 (fmt_rec_table[file_type].start)
fmt_rec_table[file_type].start(fd, count);
capture_go(fd, count, file_type, name);
fmt_rec_table[file_type].end(fd);
}
void playbackv_go(int* fds, unsigned int channels, size_t loaded, size_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 = buffer_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]);
exit(EXIT_FAILURE);
}
for (channel = 1; channel < channels; ++channel) {
if (safe_read(fds[channel], bufs[channel], r) != r) {
perror(names[channel]);
exit(EXIT_FAILURE);
}
}
if (r == 0)
break;
c += r;
} while (xrun_mode != SND_PCM_XRUN_ASAP && c < expected);
c = c * 8 / bits_per_sample;
r = pcm_writev(bufs, channels, c);
if (r != c)
break;
r = r * bits_per_frame / 8;
count -= r;
}
snd_pcm_drain(handle);
}
void capturev_go(int* fds, unsigned int channels, size_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 = buffer_bytes / channels;
for (channel = 0; channel < channels; ++channel)
bufs[channel] = audiobuf + vsize * channel;
while (count > 0) {
size_t rv;
c = count;
if (c > buffer_bytes)
c = buffer_bytes;
c = c * 8 / bits_per_frame;
if ((r = pcm_readv(bufs, channels, c)) != c)
break;
rv = r * bits_per_sample / 8;
for (channel = 0; channel < channels; ++channel) {
if (write(fds[channel], bufs[channel], rv) != rv) {
perror(names[channel]);
exit(EXIT_FAILURE);
}
}
r = r * bits_per_frame / 8;
count -= 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) {
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);
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();
count = calc_count();
playbackv_go(fds, channels, 0, 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)
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);
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();
count = calc_count();
capturev_go(fds, channels, 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)
exit(ret);
}
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