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