+/*
+ * 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; version 2 of the License.
+ *
+ * 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_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)
+ {
+ if (err < 0) {
+ snd_pcm_close(alsa_handle);
+ alsa_handle = 0;
+ }
+ }
+ 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();
+ voice = register_cmu_us_kal();
+ 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;
+}