p_g_hr_encoder = NULL;
p_g_amr_decoder = NULL;
p_g_amr_encoder = NULL;
+ p_g_amr_cmr = 0;
+ p_g_amr_cmr_valid = 0;
#ifdef WITH_GSMFR
p_g_fr_decoder = gsm_fr_create();
p_g_fr_encoder = gsm_fr_create();
{
struct gsm_data_frame *frame = (struct gsm_data_frame *)arg;
unsigned char data[160];
- int i;
+ int i, cmr;
if (!p_g_fr_decoder)
return;
}
#endif
break;
+ case GSM_TCH_FRAME_AMR:
+ if (p_g_media_type != MEDIA_TYPE_AMR) {
+ PERROR("AMR frame, but current media type mismatches.\n");
+ return;
+ }
+ if (!p_g_amr_decoder) {
+ PERROR("AMR frame, but decoder not created.\n");
+ return;
+ }
+ cmr = (frame->data[1] >> 4);
+ if (cmr <= 7) {
+ p_g_amr_cmr = cmr;
+ p_g_amr_cmr_valid = 1;
+ }
+ if (!(frame->data[2] & 0x04))
+ goto bfi;
+#ifdef WITH_GSMAMR
+ /* decode (skip length byte in front) */
+ gsm_amr_decode(p_g_amr_decoder, frame->data + 1, p_g_samples);
+ for (i = 0; i < 160; i++) {
+ data[i] = audio_s16_to_law[p_g_samples[i] & 0xffff];
+ }
+#endif
+ break;
case GSM_BAD_FRAME:
default:
bfi:
int Pgsm::audio_send(unsigned char *data, int len)
{
unsigned char frame[33];
+ int ret;
/* record data */
if (p_record)
frame_send(frame, 31, GSM_TCHF_FRAME_EFR);
#endif
break;
+ case MEDIA_TYPE_AMR:
+ if (!p_g_amr_encoder) {
+ PERROR("AMR frame, but encoder not created.\n");
+ break;
+ }
+ if (!p_g_amr_cmr_valid) {
+ PDEBUG(DEBUG_GSM, "no valid CMR yet.\n");
+ break;
+ }
+#ifdef WITH_GSMAMR
+ /* encode data (prefix a length byte) */
+ ret = gsm_amr_encode(p_g_amr_encoder, p_g_rxdata, frame + 1, p_g_amr_cmr);
+ frame[0] = ret;
+ frame_send(frame, ret + 1, GSM_TCH_FRAME_AMR);
+#endif
+ break;
}
}