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/*
Audio File Library
Copyright (c) 2010, Michael Pruett. All rights reserved.
Redistribution and use in source and binary forms, with or
without modification, are permitted provided that the following
conditions are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following
disclaimer in the documentation and/or other materials provided
with the distribution.
3. The name of the author may not be used to endorse or promote
products derived from this software without specific prior
written permission.
THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <alsa/asoundlib.h>
#include <audiofile.h>
#include <stdio.h>
#include <stdlib.h>
int main(int argc, char **argv)
{
if (argc != 2)
{
fprintf(stderr, "usage: %s filename\n", argv[0]);
exit(EXIT_FAILURE);
}
AFfilehandle file = afOpenFile(argv[1], "r", AF_NULL_FILESETUP);
if (!file)
{
fprintf(stderr, "Could not open '%s'.\n", argv[1]);
exit(EXIT_FAILURE);
}
int channels = afGetChannels(file, AF_DEFAULT_TRACK);
double rate = afGetRate(file, AF_DEFAULT_TRACK);
afSetVirtualSampleFormat(file, AF_DEFAULT_TRACK, AF_SAMPFMT_TWOSCOMP, 16);
int err;
snd_pcm_t *handle;
if ((err = snd_pcm_open(&handle, "default", SND_PCM_STREAM_PLAYBACK, 0)) < 0)
{
fprintf(stderr, "Could not open audio output: %s\n", snd_strerror(err));
exit(EXIT_FAILURE);
}
if ((err = snd_pcm_set_params(handle, SND_PCM_FORMAT_S16,
SND_PCM_ACCESS_RW_INTERLEAVED, channels, rate, 1, 500000)) < 0)
{
fprintf(stderr, "Could not set audio output parameters: %s\n", snd_strerror(err));
exit(EXIT_FAILURE);
}
const int bufferFrames = 4096;
int16_t *buffer = new int16_t[bufferFrames * channels];
while (true)
{
AFframecount framesRead = afReadFrames(file, AF_DEFAULT_TRACK, buffer, bufferFrames);
if (framesRead <= 0)
break;
snd_pcm_sframes_t framesWritten = snd_pcm_writei(handle, buffer, bufferFrames);
if (framesWritten < 0)
framesWritten = snd_pcm_recover(handle, framesWritten, 0);
if (framesWritten < 0)
{
fprintf(stderr, "Could not write audio data to output device: %s\n",
snd_strerror(err));
break;
}
}
snd_pcm_drain(handle);
snd_pcm_close(handle);
delete [] buffer;
afCloseFile(file);
return 0;
}
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