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2ba45a60 DM |
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 | } |