--- a/ater/tx_func.c	Tue Sep 24 06:15:40 2024 +0000
+++ b/ater/tx_func.c	Wed Sep 25 05:53:38 2024 +0000
@@ -9,6 +9,7 @@
 #include <string.h>
 #include <unistd.h>
 
+#include <osmocom/core/bits.h>
 #include <osmocom/core/msgb.h>
 #include <osmocom/core/select.h>
 #include <osmocom/isdn/i460_mux.h>
@@ -136,11 +137,46 @@
 	memset(fr->d_bits, 1, 63 * 4);
 }
 
+static void d144_play_frame(struct ater_subslot *at, const uint8_t *filerec)
+{
+	struct osmo_trau_frame *fr = &at->ul_frame;
+	struct msgb *msg;
+	int len;
+
+	msg = msgb_alloc_c(g_ctx, 320, "TRAU-UL-frame");
+	if (!msg)
+		return;
+	fr->type = OSMO_TRAU16_FT_EDATA;
+	fr->dir = OSMO_TRAU_DIR_UL;
+	fr->c_bits[5] = 0;
+	memset(fr->c_bits + 6, 1, 7);
+	fr->m_bits[0] = (filerec[1] & 2) >> 1;
+	fr->m_bits[1] = filerec[1] & 1;
+	osmo_pbit2ubit(fr->d_bits, filerec + 2, 288);
+	len = osmo_trau_frame_encode(msg->tail, msgb_tailroom(msg), fr);
+	if (len <= 0) {
+		msgb_free(msg);
+		return;
+	}
+	msgb_put(msg, len);
+	osmo_i460_mux_enqueue(at->schan, msg);
+}
+
 static void handle_d144(int nr)
 {
 	struct ater_subslot *at = &subslots[nr];
 	struct msgb *msg;
 
+	if (at->play_buffer) {
+		d144_play_frame(at, at->play_buffer + at->play_buf_ptr * 38);
+		at->play_buf_ptr++;
+		if (at->play_buf_ptr < at->play_buf_total)
+			return;
+		free(at->play_buffer);
+		at->play_buffer = NULL;
+		printf("file play finished\n");
+		return;
+	}
 	msg = msgb_alloc_c(g_ctx, 320, "TRAU-UL-frame");
 	if (!msg)
 		return;