| /* |
| * 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 ? AV_CODEC_ID_PCM_S16LE : AV_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; |
| } |