/* * 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; }