2 * sndio play and grab interface
3 * Copyright (c) 2010 Jacob Meuser
5 * This file is part of FFmpeg.
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.
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.
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
27 #include "sndio_common.h"
29 static inline void movecb(void *addr
, int delta
)
33 s
->hwpos
+= delta
* s
->channels
* s
->bps
;
36 av_cold
int ff_sndio_open(AVFormatContext
*s1
, int is_output
,
37 const char *audio_device
)
39 SndioData
*s
= s1
->priv_data
;
43 hdl
= sio_open(audio_device
, is_output
? SIO_PLAY
: SIO_REC
, 0);
45 av_log(s1
, AV_LOG_ERROR
, "Could not open sndio device\n");
53 par
.le
= SIO_LE_NATIVE
;
56 par
.pchan
= s
->channels
;
58 par
.rchan
= s
->channels
;
59 par
.rate
= s
->sample_rate
;
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
);
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
);
76 s
->buffer_size
= par
.round
* par
.bps
*
77 (is_output
? par
.pchan
: par
.rchan
);
80 s
->buffer
= av_malloc(s
->buffer_size
);
82 av_log(s1
, AV_LOG_ERROR
, "Could not allocate buffer\n");
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
;
92 sio_onmove(hdl
, movecb
, s
);
94 if (!sio_start(hdl
)) {
95 av_log(s1
, AV_LOG_ERROR
, "Could not start sndio\n");
104 av_freep(&s
->buffer
);
112 int ff_sndio_close(SndioData
*s
)
114 av_freep(&s
->buffer
);