| 1 | /* |
| 2 | * sndio play and grab interface |
| 3 | * Copyright (c) 2010 Jacob Meuser |
| 4 | * |
| 5 | * This file is part of FFmpeg. |
| 6 | * |
| 7 | * FFmpeg is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU Lesser General Public |
| 9 | * License as published by the Free Software Foundation; either |
| 10 | * version 2.1 of the License, or (at your option) any later version. |
| 11 | * |
| 12 | * FFmpeg is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 | * Lesser General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU Lesser General Public |
| 18 | * License along with FFmpeg; if not, write to the Free Software |
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 20 | */ |
| 21 | |
| 22 | #include <stdint.h> |
| 23 | #include <sndio.h> |
| 24 | |
| 25 | #include "avdevice.h" |
| 26 | |
| 27 | #include "sndio_common.h" |
| 28 | |
| 29 | static inline void movecb(void *addr, int delta) |
| 30 | { |
| 31 | SndioData *s = addr; |
| 32 | |
| 33 | s->hwpos += delta * s->channels * s->bps; |
| 34 | } |
| 35 | |
| 36 | av_cold int ff_sndio_open(AVFormatContext *s1, int is_output, |
| 37 | const char *audio_device) |
| 38 | { |
| 39 | SndioData *s = s1->priv_data; |
| 40 | struct sio_hdl *hdl; |
| 41 | struct sio_par par; |
| 42 | |
| 43 | hdl = sio_open(audio_device, is_output ? SIO_PLAY : SIO_REC, 0); |
| 44 | if (!hdl) { |
| 45 | av_log(s1, AV_LOG_ERROR, "Could not open sndio device\n"); |
| 46 | return AVERROR(EIO); |
| 47 | } |
| 48 | |
| 49 | sio_initpar(&par); |
| 50 | |
| 51 | par.bits = 16; |
| 52 | par.sig = 1; |
| 53 | par.le = SIO_LE_NATIVE; |
| 54 | |
| 55 | if (is_output) |
| 56 | par.pchan = s->channels; |
| 57 | else |
| 58 | par.rchan = s->channels; |
| 59 | par.rate = s->sample_rate; |
| 60 | |
| 61 | if (!sio_setpar(hdl, &par) || !sio_getpar(hdl, &par)) { |
| 62 | av_log(s1, AV_LOG_ERROR, "Impossible to set sndio parameters, " |
| 63 | "channels: %d sample rate: %d\n", s->channels, s->sample_rate); |
| 64 | goto fail; |
| 65 | } |
| 66 | |
| 67 | if (par.bits != 16 || par.sig != 1 || |
| 68 | (is_output && (par.pchan != s->channels)) || |
| 69 | (!is_output && (par.rchan != s->channels)) || |
| 70 | (par.rate != s->sample_rate)) { |
| 71 | av_log(s1, AV_LOG_ERROR, "Could not set appropriate sndio parameters, " |
| 72 | "channels: %d sample rate: %d\n", s->channels, s->sample_rate); |
| 73 | goto fail; |
| 74 | } |
| 75 | |
| 76 | s->buffer_size = par.round * par.bps * |
| 77 | (is_output ? par.pchan : par.rchan); |
| 78 | |
| 79 | if (is_output) { |
| 80 | s->buffer = av_malloc(s->buffer_size); |
| 81 | if (!s->buffer) { |
| 82 | av_log(s1, AV_LOG_ERROR, "Could not allocate buffer\n"); |
| 83 | goto fail; |
| 84 | } |
| 85 | } |
| 86 | |
| 87 | s->codec_id = par.le ? AV_CODEC_ID_PCM_S16LE : AV_CODEC_ID_PCM_S16BE; |
| 88 | s->channels = is_output ? par.pchan : par.rchan; |
| 89 | s->sample_rate = par.rate; |
| 90 | s->bps = par.bps; |
| 91 | |
| 92 | sio_onmove(hdl, movecb, s); |
| 93 | |
| 94 | if (!sio_start(hdl)) { |
| 95 | av_log(s1, AV_LOG_ERROR, "Could not start sndio\n"); |
| 96 | goto fail; |
| 97 | } |
| 98 | |
| 99 | s->hdl = hdl; |
| 100 | |
| 101 | return 0; |
| 102 | |
| 103 | fail: |
| 104 | av_freep(&s->buffer); |
| 105 | |
| 106 | if (hdl) |
| 107 | sio_close(hdl); |
| 108 | |
| 109 | return AVERROR(EIO); |
| 110 | } |
| 111 | |
| 112 | int ff_sndio_close(SndioData *s) |
| 113 | { |
| 114 | av_freep(&s->buffer); |
| 115 | |
| 116 | if (s->hdl) |
| 117 | sio_close(s->hdl); |
| 118 | |
| 119 | return 0; |
| 120 | } |