1862778732
Since the code already supports both little- and big-endian audio for recording, do not fail just because the endianness is not what we expect. It is possible that 8-bit recording would not have worked at all on some systems without that change.
121 lines
3.1 KiB
C
121 lines
3.1 KiB
C
/*
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* sndio play and grab interface
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* Copyright (c) 2010 Jacob Meuser
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <stdint.h>
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#include <sndio.h>
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#include "libavformat/avformat.h"
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#include "sndio_common.h"
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static inline void movecb(void *addr, int delta)
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{
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SndioData *s = addr;
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s->hwpos += delta * s->channels * s->bps;
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}
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av_cold int ff_sndio_open(AVFormatContext *s1, int is_output,
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const char *audio_device)
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{
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SndioData *s = s1->priv_data;
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struct sio_hdl *hdl;
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struct sio_par par;
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hdl = sio_open(audio_device, is_output ? SIO_PLAY : SIO_REC, 0);
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if (!hdl) {
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av_log(s1, AV_LOG_ERROR, "Could not open sndio device\n");
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return AVERROR(EIO);
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}
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sio_initpar(&par);
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par.bits = 16;
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par.sig = 1;
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par.le = SIO_LE_NATIVE;
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if (is_output)
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par.pchan = s->channels;
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else
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par.rchan = s->channels;
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par.rate = s->sample_rate;
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if (!sio_setpar(hdl, &par) || !sio_getpar(hdl, &par)) {
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av_log(s1, AV_LOG_ERROR, "Impossible to set sndio parameters, "
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"channels: %d sample rate: %d\n", s->channels, s->sample_rate);
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goto fail;
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}
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if (par.bits != 16 || par.sig != 1 ||
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(is_output && (par.pchan != s->channels)) ||
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(!is_output && (par.rchan != s->channels)) ||
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(par.rate != s->sample_rate)) {
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av_log(s1, AV_LOG_ERROR, "Could not set appropriate sndio parameters, "
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"channels: %d sample rate: %d\n", s->channels, s->sample_rate);
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goto fail;
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}
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s->buffer_size = par.round * par.bps *
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(is_output ? par.pchan : par.rchan);
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if (is_output) {
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s->buffer = av_malloc(s->buffer_size);
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if (!s->buffer) {
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av_log(s1, AV_LOG_ERROR, "Could not allocate buffer\n");
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goto fail;
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}
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}
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s->codec_id = par.le ? CODEC_ID_PCM_S16LE : CODEC_ID_PCM_S16BE;
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s->channels = is_output ? par.pchan : par.rchan;
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s->sample_rate = par.rate;
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s->bps = par.bps;
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sio_onmove(hdl, movecb, s);
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if (!sio_start(hdl)) {
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av_log(s1, AV_LOG_ERROR, "Could not start sndio\n");
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goto fail;
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}
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s->hdl = hdl;
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return 0;
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fail:
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av_freep(&s->buffer);
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if (hdl)
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sio_close(hdl);
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return AVERROR(EIO);
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}
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int ff_sndio_close(SndioData *s)
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{
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av_freep(&s->buffer);
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if (s->hdl)
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sio_close(s->hdl);
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return 0;
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}
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