/*
  * sndio play and grab interface
  * Copyright (c) 2010 Jacob Meuser
  *

  * This file is part of FFmpeg.

  *

  * FFmpeg is free software; you can redistribute it and/or

  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *

  * FFmpeg 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
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public

  * License along with FFmpeg; if not, write to the Free Software

  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 #include <stdint.h>
 #include <sndio.h>
 

 #include "avdevice.h"

 
 #include "sndio_common.h"
 
 static inline void movecb(void *addr, int delta)
 {
     SndioData *s = addr;
 
     s->hwpos += delta * s->channels * s->bps;
 }
 
 av_cold int ff_sndio_open(AVFormatContext *s1, int is_output,
                           const char *audio_device)
 {
     SndioData *s = s1->priv_data;
     struct sio_hdl *hdl;
     struct sio_par par;
 
     hdl = sio_open(audio_device, is_output ? SIO_PLAY : SIO_REC, 0);
     if (!hdl) {
         av_log(s1, AV_LOG_ERROR, "Could not open sndio device\n");
         return AVERROR(EIO);
     }
 
     sio_initpar(&par);
 
     par.bits = 16;
     par.sig  = 1;
     par.le   = SIO_LE_NATIVE;
 
     if (is_output)
         par.pchan = s->channels;
     else
         par.rchan = s->channels;
     par.rate = s->sample_rate;
 
     if (!sio_setpar(hdl, &par) || !sio_getpar(hdl, &par)) {
         av_log(s1, AV_LOG_ERROR, "Impossible to set sndio parameters, "
                "channels: %d sample rate: %d\n", s->channels, s->sample_rate);
         goto fail;
     }
 

     if (par.bits != 16 || par.sig != 1 ||

         (is_output  && (par.pchan != s->channels)) ||
         (!is_output && (par.rchan != s->channels)) ||
         (par.rate != s->sample_rate)) {
         av_log(s1, AV_LOG_ERROR, "Could not set appropriate sndio parameters, "
                "channels: %d sample rate: %d\n", s->channels, s->sample_rate);
         goto fail;
     }
 
     s->buffer_size = par.round * par.bps *
                      (is_output ? par.pchan : par.rchan);
 
     if (is_output) {
         s->buffer = av_malloc(s->buffer_size);
         if (!s->buffer) {
             av_log(s1, AV_LOG_ERROR, "Could not allocate buffer\n");
             goto fail;
         }
     }
 
     s->codec_id    = par.le ? CODEC_ID_PCM_S16LE : CODEC_ID_PCM_S16BE;
     s->channels    = is_output ? par.pchan : par.rchan;
     s->sample_rate = par.rate;
     s->bps         = par.bps;
 
     sio_onmove(hdl, movecb, s);
 
     if (!sio_start(hdl)) {
         av_log(s1, AV_LOG_ERROR, "Could not start sndio\n");
         goto fail;
     }
 
     s->hdl = hdl;
 
     return 0;
 
 fail:
     av_freep(&s->buffer);
 
     if (hdl)
         sio_close(hdl);
 
     return AVERROR(EIO);
 }
 
 int ff_sndio_close(SndioData *s)
 {
     av_freep(&s->buffer);
 
     if (s->hdl)
         sio_close(s->hdl);
 
     return 0;
 }