blob: 46f287588dda9d353a3d31f72a6886b2cdcc8432
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 "libavdevice/sndio.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 | } |
121 |