Logo Search packages:      
Sourcecode: alsa-utils version File versions

aplay.c

/*
 *  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., 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 <alsa/asoundlib.h>
#include <assert.h>
#include <sys/poll.h>
#include <sys/uio.h>
#include <sys/time.h>
#include <sys/signal.h>
#include "aconfig.h"
#include "formats.h"
#include "version.h"

#ifndef LLONG_MAX
#define LLONG_MAX    9223372036854775807LL
#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);

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 unsigned int sleep_min = 0;
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 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 verbose = 0;
static int buffer_pos = 0;
static size_t bits_per_sample, bits_per_frame;
static size_t chunk_bytes;
static snd_output_t *log;

static int fd = -1;
static off64_t pbrec_count = LLONG_MAX, fdcount;
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 end_raw(int fd);
static void begin_au(int fd, size_t count);
static void end_au(int fd);

struct fmt_capture {
      void (*start) (int fd, size_t count);
      void (*end) (int fd);
      char *what;
} fmt_rec_table[] = {
      {     NULL,       end_raw,    "raw data"  },
      {     begin_voc,  end_voc,    "VOC"       },
      {     begin_wave, end_wave,   "WAVE"            },
      {     begin_au,   end_au,           "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)
{
      snd_pcm_format_t k;
      fprintf(stderr,
"Usage: %s [OPTION]... [FILE]...\n"
"\n"
"-h, --help              help\n"
"    --version           print current version\n"
"-l, --list-devices      list all soundcards and digital audio devices\n"
"-L, --list-pcms         list all PCMs defined\n"
"-D, --device=NAME       select PCM by name\n"
"-q, --quiet             quiet mode\n"
"-t, --file-type TYPE    file type (voc, wav, raw or au)\n"
"-c, --channels=#        channels\n"
"-f, --format=FORMAT     sample format (case insensitive)\n"
"-r, --rate=#            sample rate\n"
"-d, --duration=#        interrupt after # seconds\n"
"-s, --sleep-min=#       min ticks to sleep\n"
"-M, --mmap              mmap stream\n"
"-N, --nonblock          nonblocking mode\n"
"-F, --period-time=#     distance between interrupts is # microseconds\n"
"-B, --buffer-time=#     buffer duration is # microseconds\n"
"    --period-size=#     distance between interrupts is # frames\n"
"    --buffer-size=#     buffer duration is # frames\n"
"-A, --avail-min=#       min available space for wakeup is # microseconds\n"
"-R, --start-delay=#     delay for automatic PCM start is # microseconds \n"
"                        (relative to buffer size if <= 0)\n"
"-T, --stop-delay=#      delay for automatic PCM stop is # microseconds from xrun\n"
"-v, --verbose           show PCM structure and setup (accumulative)\n"
"-I, --separate-channels one file for each channel\n"
            , command);
      fprintf(stderr, "Recognized sample formats are:");
      for (k = 0; k < SND_PCM_FORMAT_LAST; ++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, "-f cd (16 bit little endian, 44100, stereo)\n");
      fprintf(stderr, "-f cdr (16 bit big endian, 44100, stereo)\n");
      fprintf(stderr, "-f dat (16 bit little endian, 48000, stereo)\n");
}

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;
      }
      fprintf(stderr, "**** List of %s Hardware Devices ****\n", 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;
                  }
                  fprintf(stderr, "card %i: %s [%s], device %i: %s [%s]\n",
                        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);
                  fprintf(stderr, "  Subdevices: %i/%i\n", 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 {
                              fprintf(stderr, "  Subdevice #%i: %s\n", 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)
{
      snd_config_t *conf;
      snd_output_t *out;
      int err = snd_config_update();
      if (err < 0) {
            error("snd_config_update: %s", snd_strerror(err));
            return;
      }
      err = snd_output_stdio_attach(&out, stderr, 0);
      assert(err >= 0);
      err = snd_config_search(snd_config, "pcm", &conf);
      if (err < 0)
            return;
      fprintf(stderr, "PCM list:\n");
      snd_config_save(conf, out);
      snd_output_close(out);
}

static void version(void)
{
      fprintf(stderr, "%s: version " SND_UTIL_VERSION_STR " by Jaroslav Kysela <perex@suse.cz>\n", command);
}

static void signal_handler(int sig)
{
      if (!quiet_mode)
            fprintf(stderr, "Aborted by signal %s...\n", strsignal(sig));
      if (stream == SND_PCM_STREAM_CAPTURE) {
            fmt_rec_table[file_type].end(fd);
            stream = -1;
      }
      if (fd > 1) {
            close(fd);
            fd = -1;
      }
      if (handle) {
            snd_pcm_close(handle);
            handle = NULL;
      }
      exit(EXIT_FAILURE);
}

enum {
      OPT_VERSION = 1,
      OPT_PERIOD_SIZE,
      OPT_BUFFER_SIZE
};

int main(int argc, char *argv[])
{
      int option_index;
      char *short_options = "hlLD:qt:c:f:r:d:s:MNF:A:R:T:B:vIPC";
      static struct option long_options[] = {
            {"help", 0, 0, 'h'},
            {"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'},
            {"sleep-min", 1, 0, 's'},
            {"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'},
            {"separate-channels", 0, 0, 'I'},
            {"playback", 0, 0, 'P'},
            {"capture", 0, 0, 'C'},
            {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;

      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 = 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 || 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);
                              exit(EXIT_FAILURE);
                        }
                  }
                  break;
            case 'r':
                  tmp = atoi(optarg);
                  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 = atoi(optarg);
                  break;
            case 's':
                  sleep_min = atoi(optarg);
                  break;
            case 'N':
                  nonblock = 1;
                  open_mode |= SND_PCM_NONBLOCK;
                  break;
            case 'F':
                  period_time = atoi(optarg);
                  break;
            case 'B':
                  buffer_time = atoi(optarg);
                  break;
            case OPT_PERIOD_SIZE:
                  period_frames = atoi(optarg);
                  break;
            case OPT_BUFFER_SIZE:
                  buffer_frames = atoi(optarg);
                  break;
            case 'A':
                  avail_min = atoi(optarg);
                  break;
            case 'R':
                  start_delay = atoi(optarg);
                  break;
            case 'T':
                  stop_delay = atoi(optarg);
                  break;
            case 'v':
                  verbose++;
                  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;
            default:
                  fprintf(stderr, "Try `%s --help' for more information.\n", command);
                  return 1;
            }
      }

      if (do_device_list) {
            if (do_pcm_list) pcm_list();
            device_list();
            snd_config_update_free_global();
            return 0;
      } else if (do_pcm_list) {
            pcm_list();
            snd_config_update_free_global();
            return 0;
      }

      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 = (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;
      }


      signal(SIGINT, signal_handler);
      signal(SIGTERM, signal_handler);
      signal(SIGABRT, signal_handler);
      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);
      snd_output_close(log);
      snd_config_update_free_global();
      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;
            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
 */

size_t test_wavefile_read(int fd, 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);
            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"); \
                  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, char *_buffer, size_t size)
{
      WaveHeader *h = (WaveHeader *)_buffer;
      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));
            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_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:
            if (hwparams.format != DEFAULT_FORMAT &&
                hwparams.format != SND_PCM_FORMAT_U8)
                  fprintf(stderr, "Warning: format is changed to U8\n");
            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\n");
            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\n");
                  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\n");
                  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);
                  exit(EXIT_FAILURE);
            }
            break;
      case 32:
            hwparams.format = SND_PCM_FORMAT_S32_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;

            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\n");
            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\n");
            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\n");
            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 > 128)
            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");
            exit(EXIT_FAILURE);
      }
      return 0;
}

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;
      snd_pcm_uframes_t xfer_align;
      unsigned int rate;
      snd_pcm_uframes_t start_threshold, stop_threshold;
      snd_pcm_hw_params_alloca(&params);
      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");
            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");
            exit(EXIT_FAILURE);
      }
      err = snd_pcm_hw_params_set_format(handle, params, hwparams.format);
      if (err < 0) {
            error("Sample format non available");
            exit(EXIT_FAILURE);
      }
      err = snd_pcm_hw_params_set_channels(handle, params, hwparams.channels);
      if (err < 0) {
            error("Channels count non available");
            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) {
                  fprintf(stderr, "Warning: rate is not accurate (requested = %iHz, got = %iHz)\n", rate, hwparams.rate);
                  fprintf(stderr, "         please, try the plug plugin (-Dplug:%s)\n", snd_pcm_name(handle));
            }
      }
      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);
      err = snd_pcm_hw_params(handle, params);
      if (err < 0) {
            error("Unable to install hw params:");
            snd_pcm_hw_params_dump(params, log);
            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);
            exit(EXIT_FAILURE);
      }
      snd_pcm_sw_params_current(handle, swparams);
      err = snd_pcm_sw_params_get_xfer_align(swparams, &xfer_align);
      if (err < 0) {
            error("Unable to obtain xfer align\n");
            exit(EXIT_FAILURE);
      }
      if (sleep_min)
            xfer_align = 1;
      err = snd_pcm_sw_params_set_sleep_min(handle, swparams,
                                    sleep_min);
      assert(err >= 0);
      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 / xfer_align) * xfer_align;
      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);

      err = snd_pcm_sw_params_set_xfer_align(handle, swparams, xfer_align);
      assert(err >= 0);

      if (snd_pcm_sw_params(handle, swparams) < 0) {
            error("unable to install sw params:");
            snd_pcm_sw_params_dump(swparams, log);
            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");
            exit(EXIT_FAILURE);
      }
      // fprintf(stderr, "real chunk_size = %i, frags = %i, total = %i\n", chunk_size, setup.buf.block.frags, setup.buf.block.frags * chunk_size);
}

#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

/* 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));
            exit(EXIT_FAILURE);
      }
      if (snd_pcm_status_get_state(status) == SND_PCM_STATE_XRUN) {
            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)\n",
                  stream == SND_PCM_STREAM_PLAYBACK ? "underrun" : "overrun",
                  diff.tv_sec * 1000 + diff.tv_usec / 1000.0);
            if (verbose) {
                  fprintf(stderr, "Status:\n");
                  snd_pcm_status_dump(status, log);
            }
            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 */
      } if (snd_pcm_status_get_state(status) == SND_PCM_STATE_DRAINING) {
            if (verbose) {
                  fprintf(stderr, "Status(DRAINING):\n");
                  snd_pcm_status_dump(status, log);
            }
            if (stream == SND_PCM_STREAM_CAPTURE) {
                  fprintf(stderr, "capture stream format change? attempting recover...\n");
                  if ((res = snd_pcm_prepare(handle))<0) {
                        error("xrun(DRAINING): prepare error: %s", snd_strerror(res));
                        exit(EXIT_FAILURE);
                  }
                  return;
            }
      }
      if (verbose) {
            fprintf(stderr, "Status(R/W):\n");
            snd_pcm_status_dump(status, log);
      }
      error("read/write error, state = %s", snd_pcm_state_name(snd_pcm_status_get_state(status)));
      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));
                  exit(EXIT_FAILURE);
            }
      }
      if (!quiet_mode)
            fprintf(stderr, "Done.\n");
}

/* peak handler */
static void compute_max_peak(u_char *data, size_t count)
{
      signed int val, max, max_peak = 0, perc;
      size_t ocount = count;
      
      switch (bits_per_sample) {
      case 8: {
            signed char *valp = (signed char *)data;
            signed char mask = snd_pcm_format_silence(hwparams.format);
            while (count-- > 0) {
                  val = *valp++ ^ mask;
                  val = abs(val);
                  if (max_peak < val)
                        max_peak = val;
            }
            break;
      }
      case 16: {
            signed short *valp = (signed short *)data;
            signed short mask = snd_pcm_format_silence_16(hwparams.format);
            count /= 2;
            while (count-- > 0) {
                  val = *valp++ ^ mask;
                  val = abs(val);
                  if (max_peak < val)
                        max_peak = val;
            }
            break;
      }
      case 32: {
            signed int *valp = (signed int *)data;
            signed int mask = snd_pcm_format_silence_32(hwparams.format);
            count /= 4;
            while (count-- > 0) {
                  val = *valp++ ^ mask;
                  val = abs(val);
                  if (max_peak < val)
                        max_peak = val;
            }
            break;
      }
      default:
            break;
      }
      max = 1 << (bits_per_sample-1);
      if (max <= 0)
            max = 0x7fffffff;
      printf("Max peak (%li samples): %05i (0x%04x) ", (long)ocount, max_peak, max_peak);
      if (bits_per_sample > 16)
            perc = max_peak / (max / 100);
      else
            perc = max_peak * 100 / max;
      for (val = 0; val < 20; val++)
            if (val <= perc / 5)
                  putc('#', stdout);
            else
                  putc(' ', stdout);
      printf(" %i%%\n", perc);
}

/*
 *  write function
 */

static ssize_t pcm_write(u_char *data, size_t count)
{
      ssize_t r;
      ssize_t result = 0;

      if (sleep_min == 0 &&
          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) {
            r = writei_func(handle, data, count);
            if (r == -EAGAIN || (r >= 0 && (size_t)r < count)) {
                  snd_pcm_wait(handle, 1000);
            } else if (r == -EPIPE) {
                  xrun();
            } else if (r == -ESTRPIPE) {
                  suspend();
            } else if (r < 0) {
                  error("write error: %s", snd_strerror(r));
                  exit(EXIT_FAILURE);
            }
            if (r > 0) {
                  if (verbose > 1)
                        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 (sleep_min == 0 &&
          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;
            r = writen_func(handle, bufs, count);
            if (r == -EAGAIN || (r >= 0 && (size_t)r < count)) {
                  snd_pcm_wait(handle, 1000);
            } else if (r == -EPIPE) {
                  xrun();
            } else if (r == -ESTRPIPE) {
                  suspend();
            } else if (r < 0) {
                  error("writev error: %s", snd_strerror(r));
                  exit(EXIT_FAILURE);
            }
            if (r > 0) {
                  if (verbose > 1) {
                        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 (sleep_min == 0 &&
          count != chunk_size) {
            count = chunk_size;
      }

      while (count > 0) {
            r = readi_func(handle, data, count);
            if (r == -EAGAIN || (r >= 0 && (size_t)r < count)) {
                  snd_pcm_wait(handle, 1000);
            } else if (r == -EPIPE) {
                  xrun();
            } else if (r == -ESTRPIPE) {
                  suspend();
            } else if (r < 0) {
                  error("read error: %s", snd_strerror(r));
                  exit(EXIT_FAILURE);
            }
            if (r > 0) {
                  if (verbose > 1)
                        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 (sleep_min == 0 &&
          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;
            r = readn_func(handle, bufs, count);
            if (r == -EAGAIN || (r >= 0 && (size_t)r < count)) {
                  snd_pcm_wait(handle, 1000);
            } else if (r == -EPIPE) {
                  xrun();
            } else if (r == -ESTRPIPE) {
                  suspend();
            } else if (r < 0) {
                  error("readv error: %s", snd_strerror(r));
                  exit(EXIT_FAILURE);
            }
            if (r > 0) {
                  if (verbose > 1) {
                        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;
      char *buf;

      buf = (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");
                  exit(EXIT_FAILURE);
            }
            x -= l;
      }
      free(buf);
}

static void voc_pcm_flush(void)
{
      if (buffer_pos > 0) {
            size_t b;
            if (sleep_min == 0) {
                  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;
            } else {
                  b = buffer_pos * 8 / bits_per_frame;
            }
            if (pcm_write(audiobuf, b) != (ssize_t)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;
      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");
            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 > (ssize_t)chunk_bytes) {
            if ((size_t)safe_read(fd, buf, chunk_bytes) != chunk_bytes) {
                  error("read error");
                  exit(EXIT_FAILURE);
            }
            ofs -= chunk_bytes;
      }
      if (ofs) {
            if (safe_read(fd, buf, ofs) != ofs) {
                  error("read error");
                  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);
                              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 = lseek64(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
                              lseek64(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 < (size_t)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 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");
            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");
                  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");
                  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;

      /* 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:
            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));
            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_SHORT(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);
      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");
            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));
            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)
{
      off64_t length_seek;
      VocBlockType bt;
      size_t cnt;
      char dummy = 0;         /* Write a Terminator */

      if (write(fd, &dummy, 1) != 1) {
            error("write error");
            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_raw(int fd)
{                              /* REALLY only close output */
       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) {
            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, off64_t count, int rtype, char *name)
{
      int l, r;
      off64_t written = 0;
      off64_t c;

      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);
                  if (r < 0) {
                        perror(name);
                        exit(EXIT_FAILURE);
                  }
                  fdcount += r;
                  if (r == 0)
                        break;
                  l += r;
            } while (sleep_min == 0 && (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_drain(handle);
}

/* capturing raw data, this proc handels WAVE files and .VOCs (as one block) */

void capture_go(int fd, off64_t count, int rtype, char *name)
{
      size_t c;
      off64_t cur;
      ssize_t r, err;

      header(rtype, name);
      set_params();

      do {
            for (cur = count; cur > 0; cur -= r) {
                  c = (cur <= chunk_bytes) ? cur : chunk_bytes;
                  c = c * 8 / bits_per_frame;
                  if ((size_t)(r = pcm_read(audiobuf, c)) != c)
                        break;
                  r = r * bits_per_frame / 8;
                  if ((err = write(fd, audiobuf, r)) != r) {
                        perror(name);
                        exit(EXIT_FAILURE);
                  }
                  if (err > 0)
                        fdcount += err;
            }
      } while (rtype == FORMAT_RAW && !timelimit);
}

/*
 *  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 {
            if ((fd = open64(name, O_RDONLY, 0)) == -1) {
                  perror(name);
                  exit(EXIT_FAILURE);
            }
      }
      /* read the file header */
      dta = sizeof(AuHeader);
      if ((size_t)safe_read(fd, audiobuf, dta) != dta) {
            error("read error");
            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");
            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);
}

static void capture(char *name)
{
      pbrec_count = LLONG_MAX;
      if (!name || !strcmp(name, "-")) {
            fd = fileno(stdout);
            name = "stdout";
      } else {
            remove(name);
            if ((fd = open64(name, O_WRONLY | O_CREAT, 0644)) == -1) {
                  perror(name);
                  exit(EXIT_FAILURE);
            }
      }
      fdcount = 0;
      pbrec_count = calc_count();
      /* 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 (pbrec_count < LLONG_MAX)
            pbrec_count += pbrec_count % 2;
      else
            pbrec_count -= pbrec_count % 2;
      if (pbrec_count == 0)
            pbrec_count -= 2;
      if (fmt_rec_table[file_type].start)
            fmt_rec_table[file_type].start(fd, pbrec_count);
      capture_go(fd, pbrec_count, file_type, name);
      fmt_rec_table[file_type].end(fd);
}

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]);
                        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 (sleep_min == 0 && 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_drain(handle);
}

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]);
                        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);
            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)
            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();
      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)
            exit(ret);
}

Generated by  Doxygen 1.6.0   Back to index