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/*
* Copyright © 2009 Keith Packard <keithp@keithp.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#include <stdio.h>
#include <flite/flite.h>
#include "aoview.h"
#include <alsa/asoundlib.h>
cst_voice *register_cmu_us_kal16();
cst_voice *register_cmu_us_kal();
static cst_voice *voice;
static FILE *pipe_write;
static GThread *aoview_flite_thread;
static snd_pcm_t *alsa_handle;
gpointer
aoview_flite_task(gpointer data)
{
FILE *input = data;
char line[1024];
cst_wave *wave;
int rate;
int channels;
int err;
char *samples;
int num_samples;
err = snd_pcm_open(&alsa_handle, "default",
SND_PCM_STREAM_PLAYBACK, 0);
if (err < 0) {
fprintf(stderr, "alsa open failed %s\n",
strerror(-err));
alsa_handle = NULL;
}
rate = 0;
channels = 0;
while (fgets(line, sizeof (line) - 1, input) != NULL) {
if (!alsa_handle)
continue;
wave = flite_text_to_wave(line, voice);
if (wave->sample_rate != rate ||
wave->num_channels != channels)
{
rate = wave->sample_rate;
channels = wave->num_channels;
err = snd_pcm_set_params(alsa_handle,
SND_PCM_FORMAT_S16,
SND_PCM_ACCESS_RW_INTERLEAVED,
channels,
rate,
1,
100000);
if (err < 0)
fprintf(stderr, "alsa set_params error %s\n",
strerror(-err));
}
err = snd_pcm_prepare(alsa_handle);
if (err < 0)
fprintf(stderr, "alsa pcm_prepare error %s\n",
strerror(-err));
samples = (char *) wave->samples;
num_samples = wave->num_samples;
while (num_samples > 0) {
err = snd_pcm_writei(alsa_handle,
samples, num_samples);
if (err <= 0) {
fprintf(stderr, "alsa write error %s\n",
strerror(-err));
break;
}
num_samples -= err;
samples += err * 2 * channels;
}
snd_pcm_drain(alsa_handle);
delete_wave(wave);
}
snd_pcm_close(alsa_handle);
alsa_handle = 0;
return NULL;
}
void
aoview_flite_stop(void)
{
int status;
if (pipe_write) {
fclose(pipe_write);
pipe_write = NULL;
}
if (aoview_flite_thread) {
g_thread_join(aoview_flite_thread);
aoview_flite_thread = NULL;
}
}
FILE *
aoview_flite_start(void)
{
static once;
int p[2];
GError *error;
FILE *pipe_read;
if (!once) {
flite_init();
#if HAVE_REGISTER_CMU_US_KAL16
voice = register_cmu_us_kal16();
#else
#if HAVE_REGISTER_CMU_US_KAL
voice = register_cmu_us_kal();
#endif
#endif
if (!voice) {
perror("register voice");
exit(1);
}
}
aoview_flite_stop();
pipe(p);
pipe_read = fdopen(p[0], "r");
pipe_write = fdopen(p[1], "w");
g_thread_create(aoview_flite_task, pipe_read, TRUE, &error);
return pipe_write;
}
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