1 files changed, 148 insertions, 0 deletions
diff --git a/src/espeak.c b/src/espeak.c
new file mode 100644
index 0000000..7e7236d
--- /dev/null
+++ b/src/espeak.c
@@ -0,0 +1,148 @@
+/*
+ * GStreamer
+ * Copyright (C) 2005 Thomas Vander Stichele <thomas@apestaart.org>
+ * Copyright (C) 2005 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
+ * Copyright (C) 2009 Aleksey S. Lim <alsroot@member.fsf.org>
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Alternatively, the contents of this file may be used under the
+ * GNU Lesser General Public License Version 2.1 (the "LGPL"), in
+ * which case the following provisions apply instead of the ones
+ * mentioned above:
+ *
+ * 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 <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};
+
+static GMutex *mutex = NULL;
+static GOutputStream *buffer = NULL;
+static gint rate = 0;
+
+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;
+}
+
+struct Espeak*
+espeak_new()
+{
+    static gsize initialized = 0;
+
+    if (g_once_init_enter(&initialized))
+    {
+        rate = espeak_Initialize(AUDIO_OUTPUT_SYNCHRONOUS, 4096, NULL, 0);
+        espeak_SetSynthCallback(read_cb);
+        mutex = g_mutex_new();
+    }
+
+    if (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;
+}
+
+gboolean
+espeak_say(struct Espeak *es, const gchar *text)
+{
+    void write4bytes(GOutputStream *buffer, gint value)
+    {
+        gint i, byte;
+
+        for(i = 4; i--;)
+        {
+            byte = value & 0xff;
+            g_output_stream_write(buffer, &byte, 1, NULL, NULL);
+            value >>= 8;
+        }
+    }
+
+    g_seekable_seek((GSeekable*)es->buffer, 0, G_SEEK_SET, NULL, NULL);
+
+    g_output_stream_write(es->buffer, wave_hdr, 24, NULL, NULL);
+    write4bytes(es->buffer, rate);
+    write4bytes(es->buffer, rate * 2);
+    g_output_stream_write(es->buffer, wave_hdr+32, 12, NULL, NULL);
+
+    g_mutex_lock(mutex);
+    buffer = es->buffer;
+    gint status = espeak_Synth(text, strlen(text), 0, POS_CHARACTER, 0,
+                espeakCHARS_AUTO, NULL, NULL);
+    buffer = NULL;
+    g_mutex_unlock(mutex);
+
+    return status == EE_OK;
+}
+
+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_free(es->buffer);
+    es->buffer = 0;
+    g_free(es);
+}