view libtwamr/fr_type_conv.c @ 477:4c9222d95647

libtwamr encoder: always emit frame->mode = mode; In the original implementation of amr_encode_frame(), the 'mode' member of the output struct was set to 0xFF if the output frame type is TX_NO_DATA. This design was made to mimic the mode field (16-bit word) being set to 0xFFFF (or -1) in 3GPP test sequence format - but nothing actually depends on this struct member being set in any way, and amr_frame_to_tseq() generates the needed 0xFFFF on its own, based on frame->type being equal to TX_NO_DATA. It is simpler and more efficient to always set frame->mode to the actual encoding mode in amr_encode_frame(), and this new behavior has already been documented in doc/AMR-library-API description in anticipation of the present change.
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 18 May 2024 22:30:42 +0000
parents ffd87f972f86
children
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/*
 * The function implemented in this module converts from TXFrameType
 * to RXFrameType.  It is needed for decoding standard test sequence
 * .cod files, where TXFrameType is used in the file but RXFrameType
 * is needed for decoding.
 */

#include "tw_amr.h"

int amr_txtype_to_rxtype(enum TXFrameType tx_type, enum RXFrameType *rx_type)
{
	switch (tx_type) {
	case TX_SPEECH_GOOD:
		*rx_type = RX_SPEECH_GOOD;
		return 0;
	case TX_SPEECH_DEGRADED:
		*rx_type = RX_SPEECH_DEGRADED;
		return 0;
	case TX_SPEECH_BAD:
		*rx_type = RX_SPEECH_BAD;
		return 0;
	case TX_SID_FIRST:
		*rx_type = RX_SID_FIRST;
		return 0;
	case TX_SID_UPDATE:
		*rx_type = RX_SID_UPDATE;
		return 0;
	case TX_SID_BAD:
		*rx_type = RX_SID_BAD;
		return 0;
	case TX_ONSET:
		*rx_type = RX_ONSET;
		return 0;
	case TX_NO_DATA:
		*rx_type = RX_NO_DATA;
		return 0;
	default:
		return -1;
	}
}