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-rw-r--r--channels/chan_sip.c65
-rw-r--r--include/asterisk/format.h40
-rw-r--r--main/format.c45
-rw-r--r--main/translate.c14
-rw-r--r--res/res_format_attr_celt.c25
-rw-r--r--res/res_format_attr_silk.c32
6 files changed, 180 insertions, 41 deletions
diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index b28c0eed9..e006f06f9 100644
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -10175,7 +10175,7 @@ static int process_sdp_a_audio(const char *a, struct sip_pvt *p, struct ast_rtp_
int found = FALSE;
int codec;
char mimeSubtype[128];
- char fmtp_string[64];
+ char fmtp_string[256];
unsigned int sample_rate;
int debug = sip_debug_test_pvt(p);
@@ -10222,12 +10222,17 @@ static int process_sdp_a_audio(const char *a, struct sip_pvt *p, struct ast_rtp_
if (debug)
ast_verbose("Discarded description format %s for ID %d\n", mimeSubtype, codec);
}
- } else if (sscanf(a, "fmtp: %30u %63s", &codec, fmtp_string) == 2) {
+ } else if (sscanf(a, "fmtp: %30u %255s", &codec, fmtp_string) == 2) {
struct ast_format *format;
if ((format = ast_rtp_codecs_get_payload_format(newaudiortp, codec))) {
unsigned int bit_rate;
- int val = 0;
+
+ if (!ast_format_sdp_parse(format, fmtp_string)) {
+ found = TRUE;
+ } else {
+ ast_rtp_codecs_payloads_unset(newaudiortp, NULL, codec);
+ }
switch ((int) format->id) {
case AST_FORMAT_SIREN7:
@@ -10260,21 +10265,6 @@ static int process_sdp_a_audio(const char *a, struct sip_pvt *p, struct ast_rtp_
}
}
break;
- case AST_FORMAT_CELT:
- if (sscanf(fmtp_string, "framesize=%30u", &val) == 1) {
- ast_format_append(format, CELT_ATTR_KEY_FRAME_SIZE, val, AST_FORMAT_ATTR_END);
- }
- case AST_FORMAT_SILK:
- if (sscanf(fmtp_string, "maxaveragebitrate=%30u", &val) == 1) {
- ast_format_append(format, SILK_ATTR_KEY_MAX_BITRATE, val, AST_FORMAT_ATTR_END);
- }
- if (sscanf(fmtp_string, "usedtx=%30u", &val) == 1) {
- ast_format_append(format, SILK_ATTR_KEY_DTX, val ? 1 : 0, AST_FORMAT_ATTR_END);
- }
- if (sscanf(fmtp_string, "useinbandfec=%30u", &val) == 1) {
- ast_format_append(format, SILK_ATTR_KEY_FEC, val ? 1 : 0, AST_FORMAT_ATTR_END);
- }
- break;
}
}
}
@@ -10289,6 +10279,7 @@ static int process_sdp_a_video(const char *a, struct sip_pvt *p, struct ast_rtp_
char mimeSubtype[128];
unsigned int sample_rate;
int debug = sip_debug_test_pvt(p);
+ char fmtp_string[256];
if (sscanf(a, "rtpmap: %30u %127[^/]/%30u", &codec, mimeSubtype, &sample_rate) == 3) {
/* We have a rtpmap to handle */
@@ -10311,6 +10302,16 @@ static int process_sdp_a_video(const char *a, struct sip_pvt *p, struct ast_rtp_
if (debug)
ast_verbose("Discarded description format %s for ID %d\n", mimeSubtype, codec);
}
+ } else if (sscanf(a, "fmtp: %30u %255s", &codec, fmtp_string) == 2) {
+ struct ast_format *format;
+
+ if ((format = ast_rtp_codecs_get_payload_format(newvideortp, codec))) {
+ if (!ast_format_sdp_parse(format, fmtp_string)) {
+ found = TRUE;
+ } else {
+ ast_rtp_codecs_payloads_unset(newvideortp, NULL, codec);
+ }
+ }
}
return found;
@@ -11747,7 +11748,6 @@ static void add_codec_to_sdp(const struct sip_pvt *p,
{
int rtp_code;
struct ast_format_list fmt;
- int val = 0;
if (debug)
ast_verbose("Adding codec %d (%s) to SDP\n", format->id, ast_getformatname(format));
@@ -11765,6 +11765,8 @@ static void add_codec_to_sdp(const struct sip_pvt *p,
ast_rtp_lookup_mime_subtype2(1, format, 0, ast_test_flag(&p->flags[0], SIP_G726_NONSTANDARD) ? AST_RTP_OPT_G726_NONSTANDARD : 0),
ast_rtp_lookup_sample_rate2(1, format, 0));
+ ast_format_sdp_generate(format, rtp_code, a_buf);
+
switch ((int) format->id) {
case AST_FORMAT_G729A:
/* Indicate that we don't support VAD (G.729 annex B) */
@@ -11790,22 +11792,6 @@ static void add_codec_to_sdp(const struct sip_pvt *p,
/* Indicate that we only expect 64Kbps */
ast_str_append(a_buf, 0, "a=fmtp:%d bitrate=64000\r\n", rtp_code);
break;
- case AST_FORMAT_CELT:
- if (!ast_format_get_value(format, CELT_ATTR_KEY_FRAME_SIZE, &val) && val > 0) {
- ast_str_append(a_buf, 0, "a=fmtp:%d framesize=%u\r\n", rtp_code, val);
- }
- break;
- case AST_FORMAT_SILK:
- if (!ast_format_get_value(format, SILK_ATTR_KEY_MAX_BITRATE, &val) && val > 5000 && val < 40000) {
- ast_str_append(a_buf, 0, "a=fmtp:%d maxaveragebitrate=%u\r\n", rtp_code, val);
- }
- if (!ast_format_get_value(format, SILK_ATTR_KEY_DTX, &val)) {
- ast_str_append(a_buf, 0, "a=fmtp:%d usedtx=%u\r\n", rtp_code, val ? 1 : 0);
- }
- if (!ast_format_get_value(format, SILK_ATTR_KEY_FEC, &val)) {
- ast_str_append(a_buf, 0, "a=fmtp:%d useinbandfec=%u\r\n", rtp_code, val ? 1 : 0);
- }
- break;
}
if (fmt.cur_ms && (fmt.cur_ms < *min_packet_size))
@@ -11837,7 +11823,8 @@ static void add_vcodec_to_sdp(const struct sip_pvt *p, struct ast_format *format
ast_str_append(a_buf, 0, "a=rtpmap:%d %s/%d\r\n", rtp_code,
ast_rtp_lookup_mime_subtype2(1, format, 0, 0),
ast_rtp_lookup_sample_rate2(1, format, 0));
- /* Add fmtp code here */
+
+ ast_format_sdp_generate(format, rtp_code, a_buf);
}
/*! \brief Add text codec offer to SDP offer/answer body in INVITE or 200 OK */
@@ -12262,10 +12249,12 @@ static enum sip_result add_sdp(struct sip_request *resp, struct sip_pvt *p, int
/* Start by sending our preferred audio/video codecs */
for (x = 0; x < AST_CODEC_PREF_SIZE; x++) {
- if (!(ast_codec_pref_index(&p->prefs, x, &tmp_fmt)))
+ struct ast_format pref;
+
+ if (!(ast_codec_pref_index(&p->prefs, x, &pref)))
break;
- if (!(ast_format_cap_iscompatible(tmpcap, &tmp_fmt)))
+ if (!ast_format_cap_get_compatible_format(tmpcap, &pref, &tmp_fmt))
continue;
if (ast_format_cap_iscompatible(alreadysent, &tmp_fmt))
diff --git a/include/asterisk/format.h b/include/asterisk/format.h
index d0f1021d5..9dd6eb8b2 100644
--- a/include/asterisk/format.h
+++ b/include/asterisk/format.h
@@ -131,7 +131,7 @@ enum ast_format_id {
/*! \brief This structure contains the buffer used for format attributes */
struct ast_format_attr {
/*! The buffer formats can use to represent attributes */
- uint8_t format_attr[AST_FORMAT_ATTR_SIZE];
+ uint32_t format_attr[AST_FORMAT_ATTR_SIZE];
/*! If a format's payload needs to pass through that a new marker is required
* for RTP, this variable will be set. */
uint8_t rtp_marker_bit;
@@ -219,9 +219,47 @@ struct ast_format_attr_interface {
* \retval -1 failure, Value was either not found, or not allowed to be accessed.
*/
int (* const format_attr_get_val)(const struct ast_format_attr *format_attr, int key, void *val);
+
+ /*
+ * \brief Parse SDP attribute information, interpret it, and store it in ast_format_attr structure.
+ *
+ * \retval 0 Success, values were valid
+ * \retval -1 Failure, some values were not acceptable
+ */
+ int (* const format_attr_sdp_parse)(struct ast_format_attr *format_attr, const char *attributes);
+
+ /*!
+ * \brief Generate SDP attribute information from an ast_format_attr structure.
+ *
+ * \note This callback should generate a full fmtp line using the provided payload number.
+ */
+ void (* const format_attr_sdp_generate)(const struct ast_format_attr *format_attr, unsigned int payload, struct ast_str **str);
};
/*!
+ * \brief This function is used to have a media format aware module parse and interpret
+ * SDP attribute information. Once interpreted this information is stored on the format
+ * itself using Asterisk format attributes.
+ *
+ * \param format to set
+ * \param attributes string containing the fmtp line from the SDP
+ *
+ * \retval 0 success, attribute values were valid
+ * \retval -1 failure, values were not acceptable
+ */
+int ast_format_sdp_parse(struct ast_format *format, const char *attributes);
+
+/*!
+ * \brief This function is used to produce an fmtp SDP line for an Asterisk format. The
+ * attributes present on the Asterisk format are translated into the SDP equivalent.
+ *
+ * \param format to generate an fmtp line for
+ * \param payload numerical payload for the fmtp line
+ * \param str structure that the fmtp line will be appended to
+ */
+void ast_format_sdp_generate(const struct ast_format *format, unsigned int payload, struct ast_str **str);
+
+/*!
* \brief This function is used to set an ast_format object to represent a media format
* with optional format attributes represented by format specific key value pairs.
*
diff --git a/main/format.c b/main/format.c
index 96afd3e18..2d37eb458 100644
--- a/main/format.c
+++ b/main/format.c
@@ -119,6 +119,51 @@ static int has_interface(const struct ast_format *format)
return 1;
}
+int ast_format_sdp_parse(struct ast_format *format, const char *attributes)
+{
+ struct interface_ao2_wrapper *wrapper;
+ int res;
+
+ if (!(wrapper = find_interface(format))) {
+ return 0;
+ }
+
+ ao2_rdlock(wrapper);
+ if (!(wrapper->interface || !wrapper->interface->format_attr_sdp_parse)) {
+ ao2_unlock(wrapper);
+ ao2_ref(wrapper, -1);
+ return 0;
+ }
+
+ res = wrapper->interface->format_attr_sdp_parse(&format->fattr, attributes);
+
+ ao2_unlock(wrapper);
+ ao2_ref(wrapper, -1);
+
+ return res;
+}
+
+void ast_format_sdp_generate(const struct ast_format *format, unsigned int payload, struct ast_str **str)
+{
+ struct interface_ao2_wrapper *wrapper;
+
+ if (!(wrapper = find_interface(format))) {
+ return;
+ }
+
+ ao2_rdlock(wrapper);
+ if (!(wrapper->interface || !wrapper->interface->format_attr_sdp_generate)) {
+ ao2_unlock(wrapper);
+ ao2_ref(wrapper, -1);
+ return;
+ }
+
+ wrapper->interface->format_attr_sdp_generate(&format->fattr, payload, str);
+
+ ao2_unlock(wrapper);
+ ao2_ref(wrapper, -1);
+}
+
/*! \internal
* \brief set format attributes using an interface
*/
diff --git a/main/translate.c b/main/translate.c
index 607fee77b..ce430ce97 100644
--- a/main/translate.c
+++ b/main/translate.c
@@ -1286,12 +1286,22 @@ unsigned int ast_translate_path_steps(struct ast_format *dst_format, struct ast_
void ast_translate_available_formats(struct ast_format_cap *dest, struct ast_format_cap *src, struct ast_format_cap *result)
{
struct ast_format tmp_fmt;
- struct ast_format cur_src;
+ struct ast_format cur_dest, cur_src;
int src_audio = 0;
int src_video = 0;
int index;
- ast_format_cap_copy(result, dest);
+ ast_format_cap_iter_start(dest);
+ while (!ast_format_cap_iter_next(dest, &cur_dest)) {
+ /* We give preference to a joint format structure if possible */
+ if (ast_format_cap_get_compatible_format(src, &cur_dest, &tmp_fmt)) {
+ ast_format_cap_add(result, &tmp_fmt);
+ } else {
+ /* Otherwise we just use the destination format */
+ ast_format_cap_add(result, &cur_dest);
+ }
+ }
+ ast_format_cap_iter_end(dest);
/* if we don't have a source format, we just have to try all
possible destination formats */
diff --git a/res/res_format_attr_celt.c b/res/res_format_attr_celt.c
index bd38b29e2..aea3eb482 100644
--- a/res/res_format_attr_celt.c
+++ b/res/res_format_attr_celt.c
@@ -45,6 +45,29 @@ struct celt_attr {
unsigned int framesize;
};
+static int celt_sdp_parse(struct ast_format_attr *format_attr, const char *attributes)
+{
+ struct celt_attr *attr = (struct celt_attr *) format_attr;
+ unsigned int val;
+
+ if (sscanf(attributes, "framesize=%30u", &val) == 1) {
+ attr->framesize = val;
+ }
+
+ return 0;
+}
+
+static void celt_sdp_generate(const struct ast_format_attr *format_attr, unsigned int payload, struct ast_str **str)
+{
+ struct celt_attr *attr = (struct celt_attr *) format_attr;
+
+ if (!attr->framesize) {
+ return;
+ }
+
+ ast_str_append(str, 0, "a=fmtp:%d framesize=%d\r\n", payload, attr->framesize);
+}
+
static enum ast_format_cmp_res celt_cmp(const struct ast_format_attr *fattr1, const struct ast_format_attr *fattr2)
{
struct celt_attr *attr1 = (struct celt_attr *) fattr1;
@@ -161,6 +184,8 @@ static struct ast_format_attr_interface celt_interface = {
.format_attr_set = celt_set,
.format_attr_isset = celt_isset,
.format_attr_get_val = celt_get_val,
+ .format_attr_sdp_parse = celt_sdp_parse,
+ .format_attr_sdp_generate = celt_sdp_generate,
};
static int load_module(void)
diff --git a/res/res_format_attr_silk.c b/res/res_format_attr_silk.c
index 4f9bae739..7d4fa5bf8 100644
--- a/res/res_format_attr_silk.c
+++ b/res/res_format_attr_silk.c
@@ -47,6 +47,36 @@ struct silk_attr {
unsigned int packetloss_percentage;
};
+static int silk_sdp_parse(struct ast_format_attr *format_attr, const char *attributes)
+{
+ struct silk_attr *attr = (struct silk_attr *) format_attr;
+ unsigned int val;
+
+ if (sscanf(attributes, "maxaveragebitrate=%30u", &val) == 1) {
+ attr->maxbitrate = val;
+ }
+ if (sscanf(attributes, "usedtx=%30u", &val) == 1) {
+ attr->dtx = val;
+ }
+ if (sscanf(attributes, "useinbandfec=%30u", &val) == 1) {
+ attr->fec = val;
+ }
+
+ return 0;
+}
+
+static void silk_sdp_generate(const struct ast_format_attr *format_attr, unsigned int payload, struct ast_str **str)
+{
+ struct silk_attr *attr = (struct silk_attr *) format_attr;
+
+ if ((attr->maxbitrate > 5000) && (attr->maxbitrate < 40000)) {
+ ast_str_append(str, 0, "a=fmtp:%d maxaveragebitrate=%d\r\n", payload, attr->maxbitrate);
+ }
+
+ ast_str_append(str, 0, "a=fmtp:%d usedtx=%d\r\n", payload, attr->dtx);
+ ast_str_append(str, 0, "a=fmtp:%d useinbandfec=%d\r\n", payload, attr->fec);
+}
+
static enum ast_format_cmp_res silk_cmp(const struct ast_format_attr *fattr1, const struct ast_format_attr *fattr2)
{
struct silk_attr *attr1 = (struct silk_attr *) fattr1;
@@ -195,6 +225,8 @@ static struct ast_format_attr_interface silk_interface = {
.format_attr_set = silk_set,
.format_attr_isset = silk_isset,
.format_attr_get_val = silk_get_val,
+ .format_attr_sdp_parse = silk_sdp_parse,
+ .format_attr_sdp_generate = silk_sdp_generate,
};
static int load_module(void)
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-27 17:48:03 +0000