herrie: audio_output_pulse.c Source File

00001 /*
00002  * Copyright (c) 2006-2009 Ed Schouten <ed@80386.nl>
00003  * All rights reserved.
00004  * 
00005  * Redistribution and use in source and binary forms, with or without
00006  * modification, are permitted provided that the following conditions
00007  * are met:
00008  * 1. Redistributions of source code must retain the above copyright
00009  *    notice, this list of conditions and the following disclaimer.
00010  * 2. Redistributions in binary form must reproduce the above copyright
00011  *    notice, this list of conditions and the following disclaimer in the
00012  *    documentation and/or other materials provided with the distribution.
00013  * 
00014  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
00015  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00016  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00017  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
00018  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
00019  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
00020  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
00021  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
00022  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
00023  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
00024  * SUCH DAMAGE.
00025  */
00031 #include "stdinc.h"
00032 
00033 #include <pulse/simple.h>
00034 
00035 #include "audio_file.h"
00036 #include "audio_output.h"
00037 #include "gui.h"
00038 
00042 static pa_simple*       devptr = NULL;
00046 static pa_sample_spec   devfmt = { PA_SAMPLE_S16LE, 0, 0 };
00047 
00048 int
00049 audio_output_open(void)
00050 {
00051         return (0);
00052 }
00053 
00054 int
00055 audio_output_play(struct audio_file *fd)
00056 {
00057         int16_t buf[2048];
00058         size_t len;
00059 
00060         if ((len = audio_file_read(fd, buf, sizeof buf / sizeof(int16_t))) == 0)
00061                 return (-1);
00062 
00063         if (devfmt.rate != fd->srate || devfmt.channels != fd->channels) {
00064                 /* Sample rate or amount of channels has changed */
00065                 audio_output_close();
00066 
00067                 devfmt.rate = fd->srate;
00068                 devfmt.channels = fd->channels;
00069         }
00070 
00071         if (devptr == NULL) {
00072                 /* Open the device */
00073                 devptr = pa_simple_new(NULL, APP_NAME,
00074                     PA_STREAM_PLAYBACK, NULL, "Audio output", &devfmt,
00075                     NULL, NULL, NULL);
00076                 if (devptr == NULL) {
00077                         gui_msgbar_warn(_("Cannot open the audio device."));
00078                         return (-1);
00079                 }
00080         }
00081 
00082         if (pa_simple_write(devptr, buf, len * sizeof(int16_t), NULL) != 0) {
00083                 /* No success - device must be closed */
00084                 audio_output_close();
00085                 return (-1);
00086         }
00087 
00088         return (0);
00089 }
00090 
00091 void
00092 audio_output_close(void)
00093 {
00094         if (devptr != NULL) {
00095                 /* Close device */
00096                 pa_simple_free(devptr);
00097                 devptr = NULL;
00098         }
00099 }