TT#92250 ignore format parameters for DTMF codec

closes #1098

Change-Id: I180667a7c5fa9da8a95d99826cb3fc4006598976
(cherry picked from commit ee74914b22)
(cherry picked from commit 1c5e8a19b53a580cc4ceb3f8624c3ea967cd506f)

lib/codeclib.c

@@ -62,6 +62,8 @@ static int ilbc_decoder_input(decoder_t *dec, const str *data, GQueue *out);
 static const char *dtmf_decoder_init(decoder_t *, const str *);
 static int dtmf_decoder_input(decoder_t *dec, const str *data, GQueue *out);
 
+static int format_cmp_ignore(const struct rtp_payload_type *, const struct rtp_payload_type *);
+
 
 
 
@@ -393,6 +395,7 @@ static codec_def_t __codec_defs[] = {
 		.default_clockrate = 8000,
 		.default_channels = 1,
 		.default_fmtp = "0-15",
+		.format_cmp = format_cmp_ignore,
 		.codec_type = &codec_type_dtmf,
 		.support_encoding = 1,
 		.support_decoding = 1,
@@ -1936,3 +1939,9 @@ static int dtmf_decoder_input(decoder_t *dec, const str *data, GQueue *out) {
 
 	return 0;
 }
+
+
+
+static int format_cmp_ignore(const struct rtp_payload_type *a, const struct rtp_payload_type *b) {
+	return 0;
+}

lib/codeclib.h

@@ -69,6 +69,7 @@ typedef int packetizer_f(AVPacket *, GString *, str *, encoder_t *);
 typedef void format_init_f(struct rtp_payload_type *);
 typedef void set_enc_options_f(encoder_t *, const str *);
 typedef void set_dec_options_f(decoder_t *, const str *);
+typedef int format_cmp_f(const struct rtp_payload_type *, const struct rtp_payload_type *);
 
 
 
@@ -105,6 +106,7 @@ struct codec_def_s {
 	const int default_bitrate;
 	int default_ptime;
 	const char *default_fmtp;
+	format_cmp_f * const format_cmp;
 	packetizer_f * const packetizer;
 	const int bits_per_sample;
 	const enum media_type media_type;

lib/rtplib.c

@@ -145,6 +145,10 @@ const struct rtp_payload_type *rtp_get_rfc_codec(const str *codec) {
 int rtp_payload_type_cmp(const struct rtp_payload_type *a, const struct rtp_payload_type *b) {
 	if (rtp_payload_type_cmp_nf(a, b))
 		return 1;
+	if (a->codec_def && a->codec_def == b->codec_def) {
+		if (a->codec_def->format_cmp)
+			return a->codec_def->format_cmp(a, b);
+	}
 	if (str_cmp_str(&a->format_parameters, &b->format_parameters))
 		return 1;
 	return 0;