/*
  * 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 av_cold int audio_write_header(AVFormatContext *s1)
 {
     SndioData *s = s1->priv_data;
     AVStream *st;
     int ret;
 
     st             = s1->streams[0];
     s->sample_rate = st->codec->sample_rate;
     s->channels    = st->codec->channels;
 
     ret = ff_sndio_open(s1, 1, s1->filename);
 
     return ret;
 }
 
 static int audio_write_packet(AVFormatContext *s1, AVPacket *pkt)
 {
     SndioData *s = s1->priv_data;
     uint8_t *buf= pkt->data;
     int size = pkt->size;
     int len, ret;
 
     while (size > 0) {

         len = FFMIN(s->buffer_size - s->buffer_offset, size);

         memcpy(s->buffer + s->buffer_offset, buf, len);
         buf  += len;
         size -= len;
         s->buffer_offset += len;
         if (s->buffer_offset >= s->buffer_size) {
             ret = sio_write(s->hdl, s->buffer, s->buffer_size);
             if (ret == 0 || sio_eof(s->hdl))
                 return AVERROR(EIO);
             s->softpos      += ret;
             s->buffer_offset = 0;
         }
     }
 
     return 0;
 }
 
 static int audio_write_trailer(AVFormatContext *s1)
 {
     SndioData *s = s1->priv_data;
 
     sio_write(s->hdl, s->buffer, s->buffer_offset);
 
     ff_sndio_close(s);
 
     return 0;
 }
 
 AVOutputFormat ff_sndio_muxer = {
     .name           = "sndio",
     .long_name      = NULL_IF_CONFIG_SMALL("sndio audio playback"),
     .priv_data_size = sizeof(SndioData),
     /* XXX: we make the assumption that the soundcard accepts this format */
     /* XXX: find better solution with "preinit" method, needed also in
        other formats */
     .audio_codec    = AV_NE(CODEC_ID_PCM_S16BE, CODEC_ID_PCM_S16LE),
     .video_codec    = CODEC_ID_NONE,
     .write_header   = audio_write_header,
     .write_packet   = audio_write_packet,
     .write_trailer  = audio_write_trailer,
     .flags          = AVFMT_NOFILE,
 };