120 lines
2.7 KiB
C
120 lines
2.7 KiB
C
/*
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* simpleaudio-sndfile.c
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*
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* Copyright (C) 2011 Kamal Mostafa <kamal@whence.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdio.h>
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#include <malloc.h>
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#include <assert.h>
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#include <sndfile.h>
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#include "simpleaudio.h"
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#include "simpleaudio_internal.h"
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/*
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* sndfile backend for simpleaudio
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*/
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static ssize_t
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sa_sndfile_read( simpleaudio *sa, float *buf, size_t nframes )
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{
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SNDFILE *s = (SNDFILE *)sa->backend_handle;
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int n;
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if ((n = sf_readf_float(s, buf, nframes)) < 0) {
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fprintf(stderr, "sf_read_float: ");
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sf_perror(s);
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return -1;
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}
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//fprintf(stderr, "sf_readf_float: nframes=%ld n=%d\n", nframes, n);
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return n;
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}
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static ssize_t
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sa_sndfile_write( simpleaudio *sa, float *buf, size_t nframes )
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{
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//fprintf(stderr, "sf_writef_float: nframes=%ld\n", nframes);
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SNDFILE *s = (SNDFILE *)sa->backend_handle;
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int n;
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if ((n = sf_writef_float(s, buf, nframes)) < 0) {
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fprintf(stderr, "sf_read_float: ");
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sf_perror(s);
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return -1;
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}
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return n;
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}
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static void
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sa_sndfile_close( simpleaudio *sa )
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{
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sf_close(sa->backend_handle);
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}
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static const struct simpleaudio_backend simpleaudio_backend_pulse = {
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sa_sndfile_read,
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sa_sndfile_write,
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sa_sndfile_close,
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};
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simpleaudio *
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simpleaudio_open_stream_sndfile(
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int sa_stream_direction,
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char *path )
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{
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/* setting for SA_STREAM_PLAYBACK (file write) */
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SF_INFO sfinfo = {
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.format = SF_FORMAT_FLAC | SF_FORMAT_PCM_16, // FIXME - hardcoded
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.samplerate = 48000,
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.channels = 1,
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};
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if ( sa_stream_direction == SA_STREAM_RECORD )
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sfinfo.format = 0;
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/* Create the recording stream */
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SNDFILE *s;
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s = sf_open(path,
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sa_stream_direction == SA_STREAM_RECORD ? SFM_READ : SFM_WRITE,
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&sfinfo);
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if ( !s ) {
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fprintf(stderr, "%s: ", path);
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sf_perror(s);
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return NULL;
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}
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simpleaudio *sa = malloc(sizeof(simpleaudio));
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if ( !sa ) {
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perror("malloc");
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sf_close(s);
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return NULL;
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}
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sa->rate = sfinfo.samplerate;
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sa->channels = sfinfo.channels;
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sa->backend = &simpleaudio_backend_pulse;
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sa->backend_handle = s;
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sa->backend_framesize = sa->channels * sizeof(float);
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return sa;
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}
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