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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 1 | /* |
| 2 | * sndio play and grab interface |
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| 3 | * Copyright (c) 2010 Jacob Meuser |
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| 4 | * |
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| 5 | * This file is part of FFmpeg. |
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| 6 | * |
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| 7 | * FFmpeg is free software; you can redistribute it and/or |
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| 8 | * modify it under the terms of the GNU Lesser General Public |
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| 9 | * License as published by the Free Software Foundation; either |
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| 10 | * version 2.1 of the License, or (at your option) any later version. |
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| 11 | * |
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| 12 | * FFmpeg is distributed in the hope that it will be useful, |
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 15 | * Lesser General Public License for more details. |
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| 16 | * |
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| 17 | * You should have received a copy of the GNU Lesser General Public |
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| 18 | * License along with FFmpeg; if not, write to the Free Software |
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| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 20 | */ |
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| 21 | |||
| 22 | #include |
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| 23 | #include |
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| 24 | |||
| 25 | #include "avdevice.h" |
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| 26 | |||
| 27 | #include "sndio_common.h" |
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| 28 | |||
| 29 | static inline void movecb(void *addr, int delta) |
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| 30 | { |
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| 31 | SndioData *s = addr; |
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| 32 | |||
| 33 | s->hwpos += delta * s->channels * s->bps; |
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| 34 | } |
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| 35 | |||
| 36 | av_cold int ff_sndio_open(AVFormatContext *s1, int is_output, |
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| 37 | const char *audio_device) |
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| 38 | { |
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| 39 | SndioData *s = s1->priv_data; |
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| 40 | struct sio_hdl *hdl; |
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| 41 | struct sio_par par; |
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| 42 | |||
| 43 | hdl = sio_open(audio_device, is_output ? SIO_PLAY : SIO_REC, 0); |
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| 44 | if (!hdl) { |
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| 45 | av_log(s1, AV_LOG_ERROR, "Could not open sndio device\n"); |
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| 46 | return AVERROR(EIO); |
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| 47 | } |
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| 48 | |||
| 49 | sio_initpar(&par); |
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| 50 | |||
| 51 | par.bits = 16; |
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| 52 | par.sig = 1; |
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| 53 | par.le = SIO_LE_NATIVE; |
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| 54 | |||
| 55 | if (is_output) |
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| 56 | par.pchan = s->channels; |
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| 57 | else |
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| 58 | par.rchan = s->channels; |
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| 59 | par.rate = s->sample_rate; |
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| 60 | |||
| 61 | if (!sio_setpar(hdl, &par) || !sio_getpar(hdl, &par)) { |
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| 62 | av_log(s1, AV_LOG_ERROR, "Impossible to set sndio parameters, " |
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| 63 | "channels: %d sample rate: %d\n", s->channels, s->sample_rate); |
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| 64 | goto fail; |
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| 65 | } |
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| 66 | |||
| 67 | if (par.bits != 16 || par.sig != 1 || |
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| 68 | (is_output && (par.pchan != s->channels)) || |
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| 69 | (!is_output && (par.rchan != s->channels)) || |
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| 70 | (par.rate != s->sample_rate)) { |
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| 71 | av_log(s1, AV_LOG_ERROR, "Could not set appropriate sndio parameters, " |
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| 72 | "channels: %d sample rate: %d\n", s->channels, s->sample_rate); |
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| 73 | goto fail; |
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| 74 | } |
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| 75 | |||
| 76 | s->buffer_size = par.round * par.bps * |
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| 77 | (is_output ? par.pchan : par.rchan); |
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| 78 | |||
| 79 | if (is_output) { |
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| 80 | s->buffer = av_malloc(s->buffer_size); |
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| 81 | if (!s->buffer) { |
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| 82 | av_log(s1, AV_LOG_ERROR, "Could not allocate buffer\n"); |
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| 83 | goto fail; |
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| 84 | } |
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| 85 | } |
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| 86 | |||
| 87 | s->codec_id = par.le ? AV_CODEC_ID_PCM_S16LE : AV_CODEC_ID_PCM_S16BE; |
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| 88 | s->channels = is_output ? par.pchan : par.rchan; |
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| 89 | s->sample_rate = par.rate; |
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| 90 | s->bps = par.bps; |
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| 91 | |||
| 92 | sio_onmove(hdl, movecb, s); |
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| 93 | |||
| 94 | if (!sio_start(hdl)) { |
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| 95 | av_log(s1, AV_LOG_ERROR, "Could not start sndio\n"); |
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| 96 | goto fail; |
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| 97 | } |
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| 98 | |||
| 99 | s->hdl = hdl; |
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| 100 | |||
| 101 | return 0; |
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| 102 | |||
| 103 | fail: |
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| 104 | av_freep(&s->buffer); |
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| 105 | |||
| 106 | if (hdl) |
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| 107 | sio_close(hdl); |
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| 108 | |||
| 109 | return AVERROR(EIO); |
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| 110 | } |
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| 111 | |||
| 112 | int ff_sndio_close(SndioData *s) |
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| 113 | { |
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| 114 | av_freep(&s->buffer); |
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| 115 | |||
| 116 | if (s->hdl) |
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| 117 | sio_close(s->hdl); |
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| 118 | |||
| 119 | return 0; |
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| 120 | } |