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/*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <pthread.h>
#include <stdlib.h>
#include <string.h>
#include <glib.h>
#include <gio/gio.h>
#include <espeak/speak_lib.h>
struct Espeak
{
GOutputStream *buffer;
};
static unsigned char wave_hdr[44] = {
'R','I','F','F',0x24,0xf0,0xff,0x7f,'W','A','V','E','f','m','t',' ',
0x10,0,0,0,1,0,1,0, 9,0x3d,0,0,0x12,0x7a,0,0,
2,0,0x10,0,'d','a','t','a', 0x00,0xf0,0xff,0x7f};
pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
static GOutputStream *buffer = NULL;
static gint sample_rate = 0;
static const espeak_VOICE **voices = NULL;
static gint
read_cb(short * wav, int numsamples, espeak_EVENT * events)
{
if (wav == NULL)
return 0;
if (numsamples > 0)
g_output_stream_write(buffer, wav, numsamples*2, NULL, NULL);
return 0;
}
static void
init()
{
static volatile gsize initialized = 0;
pthread_mutex_lock(&mutex);
if (initialized == 0)
{
++initialized;
sample_rate = espeak_Initialize(AUDIO_OUTPUT_SYNCHRONOUS, 4096, NULL, 0);
espeak_SetSynthCallback(read_cb);
voices = espeak_ListVoices(NULL);
}
pthread_mutex_unlock(&mutex);
}
struct Espeak*
espeak_new()
{
init();
if (sample_rate == EE_INTERNAL_ERROR)
return NULL;
struct Espeak *es = g_new(struct Espeak, 1);
es->buffer = g_memory_output_stream_new(NULL, 0, realloc, free);
return es;
}
gchar**
espeak_voices()
{
gsize count = 0;
const espeak_VOICE **i;
char **j, **out;
init();
for (i = voices; *i; ++i) ++count;
out = j = g_new0(gchar*, count);
for (i = voices; *i; ++i)
*j++ = g_strconcat((*i)->name, ":", (*i)->languages+1, NULL);
return out;
}
gboolean
espeak_say(struct Espeak *es, const gchar *text, const gchar *voice,
guint pitch, guint rate)
{
g_seekable_seek(G_SEEKABLE(es->buffer), 0, G_SEEK_SET, NULL, NULL);
g_output_stream_write(es->buffer, wave_hdr, 24, NULL, NULL);
g_seekable_seek(G_SEEKABLE(es->buffer), 8, G_SEEK_CUR, NULL, NULL);
g_output_stream_write(es->buffer, wave_hdr+32, 12, NULL, NULL);
pthread_mutex_lock(&mutex);
buffer = es->buffer;
espeak_SetParameter(espeakPITCH, pitch, 0);
espeak_SetParameter(espeakRATE, rate, 0);
espeak_SetVoiceByName(voice);
gint status = espeak_Synth(text, strlen(text)+1, 0, POS_WORD, 0,
espeakCHARS_AUTO, NULL, NULL);
buffer = NULL;
pthread_mutex_unlock(&mutex);
if (status != EE_OK)
return FALSE;
void write4bytes(unsigned char *ptr, int value)
{
int ix;
for(ix=0; ix<4; ix++)
{
*ptr++ = value & 0xff;
value = value >> 8;
}
}
GMemoryOutputStream *mb = G_MEMORY_OUTPUT_STREAM(es->buffer);
unsigned char *ptr = g_memory_output_stream_get_data(mb);
guint size = g_memory_output_stream_get_data_size(mb);
write4bytes(ptr+24, sample_rate);
write4bytes(ptr+28, sample_rate*2);
write4bytes(ptr+4, size-8);
write4bytes(ptr+40, size-44);
return TRUE;
}
gpointer
espeak_hear(struct Espeak *es, goffset offset, guint *size)
{
GMemoryOutputStream *mb = (GMemoryOutputStream*)es->buffer;
gpointer out = g_memory_output_stream_get_data(mb) + offset;
*size = MIN(g_memory_output_stream_get_data_size(mb) - offset, *size);
return out;
}
void
espeak_unref(struct Espeak *es)
{
g_output_stream_close(es->buffer, NULL, NULL);
g_object_unref(es->buffer);
es->buffer = 0;
g_free(es);
}
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