Added GSM network support.

[lcr.git] / gsm_audio.c

diff --git a/gsm_audio.c b/gsm_audio.c
new file mode 100644 (file)
index 0000000..751f354
--- /dev/null
+++ b/gsm_audio.c
@@ -0,0 +1,54 @@
+/*****************************************************************************\
+**                                                                           **
+** LCR                                                                       **
+**                                                                           **
+**---------------------------------------------------------------------------**
+** Copyright: Andreas Eversberg                                              **
+**                                                                           **
+** gsm audio                                                                 **
+**                                                                           **
+\*****************************************************************************/ 
+
+extern "C" {
+#include "/usr/local/include/gsm.h"
+
+
+/* create gsm instance */
+void *gsm_audio_create(void)
+{
+       int value = 1;
+       gsm handle;
+
+       handle = gsm_create();
+       if (handle)
+               gsm_option(handle, GSM_OPT_WAV49, &value);
+
+       return handle;
+}
+
+/* free gsm instance */
+void gsm_audio_destroy(void *arg)
+{
+       gsm_destroy((gsm)arg);
+}
+
+/* decode frame into samples, return error */
+int gsm_audio_decode(void *arg, unsigned char *frame, signed short *samples)
+{
+       int value = 0;
+
+       gsm_option((gsm)arg, GSM_OPT_FRAME_INDEX, &value);
+       return gsm_decode((gsm)arg, (gsm_byte *)frame, (gsm_signal *)samples);
+}
+
+/* encode samples into frame */
+void gsm_audio_encode(void *arg, signed short *samples, unsigned char *frame)
+{
+       int value = 0;
+       
+       gsm_option((gsm)arg, GSM_OPT_FRAME_INDEX, &value);
+       gsm_encode((gsm)arg, (gsm_signal *)samples, (gsm_byte *)frame);
+}
+
+}
+