+
−/*
+
− * This C module is the top level entity for our stateful encoder engine.
+
− */
+
−
+
−#include <stdint.h>
+
−#include <stdlib.h>
+
−#include "tw_amr.h"
+
−#include "namespace.h"
+
−#include "typedef.h"
+
−#include "cnst.h"
+
−#include "cod_amr.h"
+
−#include "pre_proc.h"
+
−#include "sid_sync.h"
+
−#include "e_homing.h"
+
−
+
−struct amr_encoder_state {
+
−	cod_amrState		cod;
+
−	Pre_ProcessState	pre;
+
−	sid_syncState		sid;
+
−};
+
−
+
−struct amr_encoder_state *amr_encoder_create(int dtx, int use_vad2)
+
−{
+
−	struct amr_encoder_state *st;
+
−
+
−	st = malloc(sizeof(struct amr_encoder_state));
+
−	if (st)
+
−		amr_encoder_reset(st, dtx, use_vad2);
+
−	return st;
+
−}
+
−
+
−void amr_encoder_reset(struct amr_encoder_state *st, int dtx, int use_vad2)
+
−{
+
−	cod_amr_reset(&st->cod, dtx, use_vad2);
+
−	Pre_Process_reset(&st->pre);
+
−	sid_sync_reset(&st->sid);
+
−}
+
−
+
−void amr_encode_frame(struct amr_encoder_state *st, enum Mode mode,
+
−			const int16_t *pcm, struct amr_param_frame *frame)
+
−{
+
−	Word16 new_speech[L_FRAME], syn[L_FRAME];
+
−	enum Mode used_mode;
+
−	enum TXFrameType tx_type;
+
−	Word16 i;
+
−
+
−	/* input */
+
−	for (i = 0; i < L_FRAME; i++)
+
−		new_speech[i] = pcm[i] & 0xFFF8;
+
−	Pre_Process(&st->pre, new_speech, L_FRAME);
+
−
+
−	/* main process */
+
−	cod_amr(&st->cod, mode, new_speech, frame->param, &used_mode, syn);
+
−	sid_sync(&st->sid, used_mode, &tx_type);
+
−	frame->type = tx_type;
+
−	frame->mode = mode;
+
−
+
−	/* encoder homing */
+
−	if (encoder_homing_frame_test(pcm))
+
−		amr_encoder_reset(st, st->cod.dtx, st->cod.vadSt.use_vad2);
+
−}