yading@10: /*
yading@10:  * sndio play and grab interface
yading@10:  * Copyright (c) 2010 Jacob Meuser
yading@10:  *
yading@10:  * This file is part of FFmpeg.
yading@10:  *
yading@10:  * FFmpeg is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * FFmpeg is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with FFmpeg; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: #include <stdint.h>
yading@10: #include <sndio.h>
yading@10: 
yading@10: #include "avdevice.h"
yading@10: 
yading@10: #include "sndio_common.h"
yading@10: 
yading@10: static inline void movecb(void *addr, int delta)
yading@10: {
yading@10:     SndioData *s = addr;
yading@10: 
yading@10:     s->hwpos += delta * s->channels * s->bps;
yading@10: }
yading@10: 
yading@10: av_cold int ff_sndio_open(AVFormatContext *s1, int is_output,
yading@10:                           const char *audio_device)
yading@10: {
yading@10:     SndioData *s = s1->priv_data;
yading@10:     struct sio_hdl *hdl;
yading@10:     struct sio_par par;
yading@10: 
yading@10:     hdl = sio_open(audio_device, is_output ? SIO_PLAY : SIO_REC, 0);
yading@10:     if (!hdl) {
yading@10:         av_log(s1, AV_LOG_ERROR, "Could not open sndio device\n");
yading@10:         return AVERROR(EIO);
yading@10:     }
yading@10: 
yading@10:     sio_initpar(&par);
yading@10: 
yading@10:     par.bits = 16;
yading@10:     par.sig  = 1;
yading@10:     par.le   = SIO_LE_NATIVE;
yading@10: 
yading@10:     if (is_output)
yading@10:         par.pchan = s->channels;
yading@10:     else
yading@10:         par.rchan = s->channels;
yading@10:     par.rate = s->sample_rate;
yading@10: 
yading@10:     if (!sio_setpar(hdl, &par) || !sio_getpar(hdl, &par)) {
yading@10:         av_log(s1, AV_LOG_ERROR, "Impossible to set sndio parameters, "
yading@10:                "channels: %d sample rate: %d\n", s->channels, s->sample_rate);
yading@10:         goto fail;
yading@10:     }
yading@10: 
yading@10:     if (par.bits != 16 || par.sig != 1 ||
yading@10:         (is_output  && (par.pchan != s->channels)) ||
yading@10:         (!is_output && (par.rchan != s->channels)) ||
yading@10:         (par.rate != s->sample_rate)) {
yading@10:         av_log(s1, AV_LOG_ERROR, "Could not set appropriate sndio parameters, "
yading@10:                "channels: %d sample rate: %d\n", s->channels, s->sample_rate);
yading@10:         goto fail;
yading@10:     }
yading@10: 
yading@10:     s->buffer_size = par.round * par.bps *
yading@10:                      (is_output ? par.pchan : par.rchan);
yading@10: 
yading@10:     if (is_output) {
yading@10:         s->buffer = av_malloc(s->buffer_size);
yading@10:         if (!s->buffer) {
yading@10:             av_log(s1, AV_LOG_ERROR, "Could not allocate buffer\n");
yading@10:             goto fail;
yading@10:         }
yading@10:     }
yading@10: 
yading@10:     s->codec_id    = par.le ? AV_CODEC_ID_PCM_S16LE : AV_CODEC_ID_PCM_S16BE;
yading@10:     s->channels    = is_output ? par.pchan : par.rchan;
yading@10:     s->sample_rate = par.rate;
yading@10:     s->bps         = par.bps;
yading@10: 
yading@10:     sio_onmove(hdl, movecb, s);
yading@10: 
yading@10:     if (!sio_start(hdl)) {
yading@10:         av_log(s1, AV_LOG_ERROR, "Could not start sndio\n");
yading@10:         goto fail;
yading@10:     }
yading@10: 
yading@10:     s->hdl = hdl;
yading@10: 
yading@10:     return 0;
yading@10: 
yading@10: fail:
yading@10:     av_freep(&s->buffer);
yading@10: 
yading@10:     if (hdl)
yading@10:         sio_close(hdl);
yading@10: 
yading@10:     return AVERROR(EIO);
yading@10: }
yading@10: 
yading@10: int ff_sndio_close(SndioData *s)
yading@10: {
yading@10:     av_freep(&s->buffer);
yading@10: 
yading@10:     if (s->hdl)
yading@10:         sio_close(s->hdl);
yading@10: 
yading@10:     return 0;
yading@10: }