rtbuf/rtbuf/lib/sndio/output.c

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• Hash : 0cc14f3d
  Author : Thomas de Grivel
  Date : 2021-02-20T23:06:51
  

  wip remove autotools
  

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• lib/sndio/output.c

• /*
   * Copyright 2018-2021 Thomas de Grivel <thoxdg@gmail.com>
   *
   * Permission to use, copy, modify, and distribute this software for any
   * purpose with or without fee is hereby granted, provided that the above
   * copyright notice and this permission notice appear in all copies.
   *
   * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
   * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
   * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
   * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
   * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
   * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
   */
  
  #include <limits.h>
  #include <sndio.h>
  #include <stdio.h>
  #include <strings.h>
  #include "../../librtbuf/rtbuf.h"
  #include "../../librtbuf/lib.h"
  #include "../signal.h"
  #include "../signal_type.h"
  #include "../sndio.h"
  #include "../sndio_type.h"
  
  s_rtbuf_lib_proc_in rtbuf_sndio_output_in[] =
    {{ "left",  RTBUF_SIGNAL_TYPE, 0.0, -1.0, 1.0, 1.0 },
     { "right", RTBUF_SIGNAL_TYPE, 0.0, -1.0, 1.0, 1.0 },
     { 0, 0, 0.0, 0.0, 0.0, 0.0 }};
  
  s_rtbuf_lib_proc_out rtbuf_sndio_output_out[] =
    {{ "samples", RTBUF_SNDIO_SAMPLES_TYPE },
     { "reserved", RTBUF_SNDIO_OUTPUT_RESERVED_TYPE },
     { 0, 0 }};
  
  void rtbuf_sndio_output_parameters (struct sio_par *want)
  {
    bzero(want, sizeof(struct sio_par));
    sio_initpar(want);
    want->bits = 16;
    want->sig = 1;
    want->rchan = 0;
    want->pchan = RTBUF_SNDIO_CHANNELS;
    want->rate = RTBUF_SIGNAL_SAMPLERATE;
    want->appbufsz = RTBUF_SIGNAL_SAMPLES;
    want->xrun = SIO_IGNORE;
    print_sio_par(want); printf("\n");
  }
  
  int rtbuf_sndio_output_check_parameters (struct sio_par *have)
  {
    int ok;
    print_sio_par(have);
    printf("\n");
    ok = (have->bits == 16 &&
          have->sig == 1 &&
          have->rchan == 0 &&
          have->pchan == RTBUF_SNDIO_CHANNELS &&
          have->rate == RTBUF_SIGNAL_SAMPLERATE);
    return ok;
  }
  
  int rtbuf_sndio_output_start (s_rtbuf *rtb)
  {
    s_rtbuf_sndio_output_data *data;
    s_rtbuf_sndio_output_reserved *res;
    assert(rtb->proc->out_bytes == sizeof(*data));
    data = (s_rtbuf_sndio_output_data*) rtb->data;
    res = &data->reserved;
    if (!res->sio_hdl) {
      res->sio_hdl = sio_open(SIO_DEVANY, SIO_PLAY, 0);
      if (!res->sio_hdl)
        return rtbuf_err("sndio_output_start: sio_open failed");
      else {
        rtbuf_sndio_output_parameters(&res->want);
        if (sio_setpar(res->sio_hdl,
                       &res->want) != 1)
          return rtbuf_err("sndio_output_start: sio_setpar failed");
        else if (sio_getpar(res->sio_hdl,
                            &res->have) != 1)
          return rtbuf_err("sndio_output_start: sio_getpar failed");
        else if (!rtbuf_sndio_output_check_parameters(&res->have))
          return rtbuf_err("sndio_output_start: check_parameters failed");
        else if (sio_start(res->sio_hdl) != 1)
          return rtbuf_err("sndio_output_start: sio_start failed");
      }
    }
    return 0;
  }
  
  int rtbuf_sndio_output_stop (s_rtbuf *rtb)
  {
    s_rtbuf_sndio_output_data *data;
    data = (s_rtbuf_sndio_output_data*) rtb->data;
    if (data->reserved.sio_hdl) {
      sio_close(data->reserved.sio_hdl);
      data->reserved.sio_hdl = 0;
    }
    return 0;
  }
  
  int rtbuf_sndio_output (s_rtbuf *rtb)
  {
    s_rtbuf_signal_fun in[RTBUF_SNDIO_CHANNELS];
    s_rtbuf_sndio_output_data *data;
    short *sample;
    unsigned int i = 0;
    unsigned int j = 0;
    assert(rtb);
    assert(rtb->data);
    assert(rtb->proc);
    while (j < RTBUF_SNDIO_CHANNELS) {
      rtbuf_signal_fun(rtb, j, &in[j]);
      j++;
    }
    data = (s_rtbuf_sndio_output_data*) rtb->data;
    sample = data->samples;
    /* printf("sndio_output"); */
    while (i < RTBUF_SIGNAL_SAMPLES) {
      j = 0;
      while (j < RTBUF_SNDIO_CHANNELS) {
        double in_ = in[j].sample_fun(in[j].signal, i);
        in_ = clamp(-1.0, in_, 1.0);
        if (in_ < 0.0)
          in_ *= -SHRT_MIN;
        else
          in_ *= SHRT_MAX;
        *sample = (short) in_;
        sample++;
        j++;
      }
      i++;
    }
    sio_write(data->reserved.sio_hdl, data->samples,
              sizeof(t_rtbuf_sndio_samples));
    /* printf("\n"); */
    return 0;
  }
  
  s_rtbuf_lib_proc rtbuf_lib_proc =
    { "output",
      rtbuf_sndio_output,
      rtbuf_sndio_output_start,
      rtbuf_sndio_output_stop,
      rtbuf_sndio_output_in,
      rtbuf_sndio_output_out };
  
  unsigned long rtbuf_lib_ver = RTBUF_LIB_VER;
  
  void print_sio_par (struct sio_par *par)
  {
    printf("#<sio_par bits=%i sig=%i rchan=%i pchan=%i rate=%i>",
           par->bits, par->sig, par->rchan, par->pchan, par->rate);
  }
  

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