M4Err SDP_Write(SDPInfo *sdp, char **out_str_buf)
{
char *buf;
SDP_FMTP *fmtp;
char temp[50];
SDPMedia *media;
SDPBandwidth *bw;
u32 buf_size, pos, i, j, k;
SDP_RTPMap *map;
SDPConnection *conn;
M4Err e;
SDPTiming *timing;
X_Attribute *att;
e = SDP_CheckInfo(sdp);
if (e) return e;
buf = malloc(SDP_WRITE_STEPALLOC);
buf_size = SDP_WRITE_STEPALLOC;
pos = 0;
//v
SDP_WRITE_ALLOC_STR("v=", 0);
SDP_WRITE_ALLOC_INT(sdp->Version, 0, 0);
SDP_WRITE_ALLOC_STR("\r\n", 0);
//o
SDP_WRITE_ALLOC_STR("o=", 0);
SDP_WRITE_ALLOC_STR(sdp->o_username, 1);
SDP_WRITE_ALLOC_STR(sdp->o_session_id, 1);
SDP_WRITE_ALLOC_STR(sdp->o_version, 1);
SDP_WRITE_ALLOC_STR(sdp->o_net_type, 1);
SDP_WRITE_ALLOC_STR(sdp->o_add_type, 1);
SDP_WRITE_ALLOC_STR(sdp->o_address, 0);
SDP_WRITE_ALLOC_STR("\r\n", 0);
//s
TEST_SDP_WRITE_SINGLE("s=", sdp->s_session_name, 0);
//i
TEST_SDP_WRITE_SINGLE("i=", sdp->i_description, 0);
//u
TEST_SDP_WRITE_SINGLE("u=", sdp->u_uri, 0);
//e
TEST_SDP_WRITE_SINGLE("e=", sdp->e_email, 0);
//p
TEST_SDP_WRITE_SINGLE("p=", sdp->p_phone, 0);
//c
SDP_WRITE_CONN(sdp->c_connection);
//b
for (i=0; i<ChainGetCount(sdp->b_bandwidth); i++) {
bw = ChainGetEntry(sdp->b_bandwidth, i);
SDP_WRITE_ALLOC_STR("b=", 0);
SDP_WRITE_ALLOC_STR(bw->name, 0);
SDP_WRITE_ALLOC_STR(":", 0);
SDP_WRITE_ALLOC_INT(bw->value, 0, 0);
SDP_WRITE_ALLOC_STR("\r\n", 0);
}
//t+r+z
for (i=0; i<ChainGetCount(sdp->Timing); i++) {
timing = ChainGetEntry(sdp->Timing, i);
if (timing->NbRepeatOffsets > SDP_MAX_TIMEOFFSET) timing->NbRepeatOffsets = SDP_MAX_TIMEOFFSET;
if (timing->NbZoneOffsets > SDP_MAX_TIMEOFFSET) timing->NbZoneOffsets = SDP_MAX_TIMEOFFSET;
//t
SDP_WRITE_ALLOC_STR("t=", 0);
SDP_WRITE_ALLOC_INT(timing->StartTime, 1, 0);
SDP_WRITE_ALLOC_INT(timing->StopTime, 0, 0);
SDP_WRITE_ALLOC_STR("\r\n", 0);
if (timing->NbRepeatOffsets) {
SDP_WRITE_ALLOC_STR("r=", 0);
SDP_WRITE_ALLOC_INT(timing->RepeatInterval, 1, 0);
SDP_WRITE_ALLOC_INT(timing->ActiveDuration, 0, 0);
for (j=0; j<timing->NbRepeatOffsets; j++) {
SDP_WRITE_ALLOC_STR(" ", 0);
SDP_WRITE_ALLOC_INT(timing->OffsetFromStart[j], 0, 0);
}
SDP_WRITE_ALLOC_STR("\r\n", 0);
}
if (timing->NbZoneOffsets) {
SDP_WRITE_ALLOC_STR("z=", 0);
for (j=0; j<timing->NbZoneOffsets; j++) {
SDP_WRITE_ALLOC_INT(timing->AdjustmentTime[j], 1, 0);
if (j+1 == timing->NbRepeatOffsets) {
SDP_WRITE_ALLOC_INT(timing->AdjustmentOffset[j], 0, 1);
} else {
SDP_WRITE_ALLOC_INT(timing->AdjustmentOffset[j], 1, 1);
}
}
SDP_WRITE_ALLOC_STR("\r\n", 0);
}
}
//k
if (sdp->k_method) {
SDP_WRITE_ALLOC_STR("k=", 0);
SDP_WRITE_ALLOC_STR(sdp->k_method, 0);
if (sdp->k_key) {
SDP_WRITE_ALLOC_STR(":", 0);
SDP_WRITE_ALLOC_STR(sdp->k_key, 0);
}
SDP_WRITE_ALLOC_STR("\r\n", 0);
}
//a=cat
TEST_SDP_WRITE_SINGLE("a=cat", sdp->a_cat, 1);
//a=keywds
TEST_SDP_WRITE_SINGLE("a=keywds", sdp->a_keywds, 1);
//a=tool
TEST_SDP_WRITE_SINGLE("a=tool", sdp->a_tool, 1);
//a=SendRecv
switch (sdp->a_SendRecieve) {
case 1:
TEST_SDP_WRITE_SINGLE("a=", "recvonly", 0);
break;
case 2:
TEST_SDP_WRITE_SINGLE("a=", "sendonly", 0);
break;
case 3:
TEST_SDP_WRITE_SINGLE("a=", "sendrecv", 0);
break;
default:
break;
}
//a=type
TEST_SDP_WRITE_SINGLE("a=type", sdp->a_type, 1);
//a=charset
TEST_SDP_WRITE_SINGLE("a=charset", sdp->a_charset, 1);
//a=sdplang
TEST_SDP_WRITE_SINGLE("a=sdplang", sdp->a_sdplang, 1);
//a=lang
TEST_SDP_WRITE_SINGLE("a=lang", sdp->a_lang, 1);
//the rest
for (i=0; i<ChainGetCount(sdp->Attributes); i++) {
att = ChainGetEntry(sdp->Attributes, i);
SDP_WRITE_ALLOC_STR("a=", 0);
SDP_WRITE_ALLOC_STR(att->Name, 0);
if (att->Value) {
SDP_WRITE_ALLOC_STR(":", 0);
SDP_WRITE_ALLOC_STR(att->Value, 0);
}
SDP_WRITE_ALLOC_STR("\r\n", 0);
}
//now write media specific
for (i=0; i<ChainGetCount(sdp->media_desc); i++) {
media = ChainGetEntry(sdp->media_desc, i);
//m=
SDP_WRITE_ALLOC_STR("m=", 0);
switch (media->Type) {
case 1:
SDP_WRITE_ALLOC_STR("video", 1);
break;
case 2:
SDP_WRITE_ALLOC_STR("audio", 1);
break;
case 3:
SDP_WRITE_ALLOC_STR("data", 1);
break;
case 4:
SDP_WRITE_ALLOC_STR("control", 1);
break;
default:
SDP_WRITE_ALLOC_STR("application", 1);
break;
}
SDP_WRITE_ALLOC_INT(media->PortNumber, 0, 0);
if (media->NumPorts >= 2) {
SDP_WRITE_ALLOC_STR("/", 0);
SDP_WRITE_ALLOC_INT(media->NumPorts, 1, 0);
} else {
SDP_WRITE_ALLOC_STR(" ", 0);
}
SDP_WRITE_ALLOC_STR(media->Profile, 1);
SDP_WRITE_ALLOC_STR(media->fmt_list, 0);
for (j=0;j<ChainGetCount(media->RTPMaps); j++) {
map = ChainGetEntry(media->RTPMaps, j);
SDP_WRITE_ALLOC_STR(" ", 0);
SDP_WRITE_ALLOC_INT(map->PayloadType, 0, 0);
}
SDP_WRITE_ALLOC_STR("\r\n", 0);
//c=
for (j=0; j<ChainGetCount(media->Connections); j++) {
conn = ChainGetEntry(media->Connections, j);
SDP_WRITE_CONN(conn);
}
//k=
if (media->k_method) {
SDP_WRITE_ALLOC_STR("k=", 0);
SDP_WRITE_ALLOC_STR(media->k_method, 0);
if (media->k_key) {
SDP_WRITE_ALLOC_STR(":", 0);
SDP_WRITE_ALLOC_STR(media->k_key, 0);
}
SDP_WRITE_ALLOC_STR("\r\n", 0);
}
//b
for (j=0; j<ChainGetCount(media->Bandwidths); j++) {
bw = ChainGetEntry(media->Bandwidths, j);
SDP_WRITE_ALLOC_STR("b=", 0);
SDP_WRITE_ALLOC_STR(bw->name, 0);
SDP_WRITE_ALLOC_STR(":", 0);
SDP_WRITE_ALLOC_INT(bw->value, 0, 0);
SDP_WRITE_ALLOC_STR("\r\n", 0);
}
//a=rtpmap
for (j=0; j<ChainGetCount(media->RTPMaps); j++) {
map = ChainGetEntry(media->RTPMaps, j);
SDP_WRITE_ALLOC_STR("a=rtpmap", 0);
SDP_WRITE_ALLOC_STR(":", 0);
SDP_WRITE_ALLOC_INT(map->PayloadType, 1, 0);
SDP_WRITE_ALLOC_STR(map->payload_name, 0);
SDP_WRITE_ALLOC_STR("/", 0);
SDP_WRITE_ALLOC_INT(map->ClockRate, 0, 0);
if (map->AudioChannels > 1) {
SDP_WRITE_ALLOC_STR("/", 0);
SDP_WRITE_ALLOC_INT(map->AudioChannels, 0, 0);
}
SDP_WRITE_ALLOC_STR("\r\n", 0);
}
//a=fmtp
for (j=0; j<ChainGetCount(media->FMTP); j++) {
fmtp = ChainGetEntry(media->FMTP, j);
SDP_WRITE_ALLOC_STR("a=fmtp:", 0);
SDP_WRITE_ALLOC_INT(fmtp->PayloadType, 1 , 0);
for (k=0; k<ChainGetCount(fmtp->Attributes); k++) {
if (k) SDP_WRITE_ALLOC_STR(";", 0);
att = ChainGetEntry(fmtp->Attributes, k);
SDP_WRITE_ALLOC_STR(att->Name, 0);
if (att->Value) {
SDP_WRITE_ALLOC_STR("=", 0);
SDP_WRITE_ALLOC_STR(att->Value, 0);
}
}
SDP_WRITE_ALLOC_STR("\r\n", 0);
}
//a=ptime
if (media->PacketTime) {
SDP_WRITE_ALLOC_STR("a=ptime:", 0);
SDP_WRITE_ALLOC_INT(media->PacketTime, 0, 0);
SDP_WRITE_ALLOC_STR("\r\n", 0);
}
//a=FrameRate
if (media->Type == 1 && media->FrameRate) {
SDP_WRITE_ALLOC_STR("a=framerate:", 0);
SDP_WRITE_ALLOC_FLOAT(media->FrameRate, 0);
SDP_WRITE_ALLOC_STR("\r\n", 0);
}
//a=SendRecv
switch (media->SendRecieve) {
case 1:
TEST_SDP_WRITE_SINGLE("a=", "recvonly", 0);
break;
case 2:
TEST_SDP_WRITE_SINGLE("a=", "sendonly", 0);
break;
case 3:
TEST_SDP_WRITE_SINGLE("a=", "sendrecv", 0);
break;
default:
break;
}
//a=orient
TEST_SDP_WRITE_SINGLE("a=orient", media->orientation, 1);
//a=sdplang
TEST_SDP_WRITE_SINGLE("a=sdplang", media->sdplang, 1);
//a=lang
TEST_SDP_WRITE_SINGLE("a=lang", media->lang, 1);
//a=quality
if (media->Quality >= 0) {
SDP_WRITE_ALLOC_STR("a=quality:", 0);
SDP_WRITE_ALLOC_INT(media->Quality, 0, 0);
SDP_WRITE_ALLOC_STR("\r\n", 0);
}
//the rest
for (j=0; j<ChainGetCount(media->Attributes); j++) {
att = ChainGetEntry(media->Attributes, j);
SDP_WRITE_ALLOC_STR("a=", 0);
SDP_WRITE_ALLOC_STR(att->Name, 0);
if (att->Value) {
SDP_WRITE_ALLOC_STR(":", 0);
SDP_WRITE_ALLOC_STR(att->Value, 0);
}
SDP_WRITE_ALLOC_STR("\r\n", 0);
}
}
//finally realloc
//finall NULL char
pos += 1;
buf = realloc(buf, pos);
*out_str_buf = buf;
return M4OK;
}
GF_EXPORT
GF_Err gf_sdp_info_write(GF_SDPInfo *sdp, char **out_str_buf)
{
char *buf;
GF_SDP_FMTP *fmtp;
char temp[50];
GF_SDPMedia *media;
GF_SDPBandwidth *bw;
u32 buf_size, pos, i, j, k;
GF_RTPMap *map;
GF_SDPConnection *conn;
GF_Err e;
GF_SDPTiming *timing;
GF_X_Attribute *att;
e = gf_sdp_info_check(sdp);
if (e) return e;
buf = (char *)gf_malloc(SDP_WRITE_STEPALLOC);
buf_size = SDP_WRITE_STEPALLOC;
pos = 0;
//v
SDP_WRITE_ALLOC_STR("v=", 0);
SDP_WRITE_ALLOC_INT(sdp->Version, 0, 0);
SDP_WRITE_ALLOC_STR("\r\n", 0);
//o
SDP_WRITE_ALLOC_STR("o=", 0);
SDP_WRITE_ALLOC_STR(sdp->o_username, 1);
SDP_WRITE_ALLOC_STR(sdp->o_session_id, 1);
SDP_WRITE_ALLOC_STR(sdp->o_version, 1);
SDP_WRITE_ALLOC_STR(sdp->o_net_type, 1);
SDP_WRITE_ALLOC_STR(sdp->o_add_type, 1);
SDP_WRITE_ALLOC_STR(sdp->o_address, 0);
SDP_WRITE_ALLOC_STR("\r\n", 0);
//s
TEST_SDP_WRITE_SINGLE("s=", sdp->s_session_name, 0);
//i
TEST_SDP_WRITE_SINGLE("i=", sdp->i_description, 0);
//u
TEST_SDP_WRITE_SINGLE("u=", sdp->u_uri, 0);
//e
TEST_SDP_WRITE_SINGLE("e=", sdp->e_email, 0);
//p
TEST_SDP_WRITE_SINGLE("p=", sdp->p_phone, 0);
//c
SDP_WRITE_CONN(sdp->c_connection);
//b
i=0;
while ((bw = (GF_SDPBandwidth*)gf_list_enum(sdp->b_bandwidth, &i))) {
SDP_WRITE_ALLOC_STR("b=", 0);
SDP_WRITE_ALLOC_STR(bw->name, 0);
SDP_WRITE_ALLOC_STR(":", 0);
SDP_WRITE_ALLOC_INT(bw->value, 0, 0);
SDP_WRITE_ALLOC_STR("\r\n", 0);
}
//t+r+z
i=0;
while ((timing = (GF_SDPTiming*)gf_list_enum(sdp->Timing, &i))) {
if (timing->NbRepeatOffsets > GF_SDP_MAX_TIMEOFFSET) timing->NbRepeatOffsets = GF_SDP_MAX_TIMEOFFSET;
if (timing->NbZoneOffsets > GF_SDP_MAX_TIMEOFFSET) timing->NbZoneOffsets = GF_SDP_MAX_TIMEOFFSET;
//t
SDP_WRITE_ALLOC_STR("t=", 0);
SDP_WRITE_ALLOC_INT(timing->StartTime, 1, 0);
SDP_WRITE_ALLOC_INT(timing->StopTime, 0, 0);
SDP_WRITE_ALLOC_STR("\r\n", 0);
if (timing->NbRepeatOffsets) {
SDP_WRITE_ALLOC_STR("r=", 0);
SDP_WRITE_ALLOC_INT(timing->RepeatInterval, 1, 0);
SDP_WRITE_ALLOC_INT(timing->ActiveDuration, 0, 0);
for (j=0; j<timing->NbRepeatOffsets; j++) {
SDP_WRITE_ALLOC_STR(" ", 0);
SDP_WRITE_ALLOC_INT(timing->OffsetFromStart[j], 0, 0);
}
SDP_WRITE_ALLOC_STR("\r\n", 0);
}
if (timing->NbZoneOffsets) {
SDP_WRITE_ALLOC_STR("z=", 0);
for (j=0; j<timing->NbZoneOffsets; j++) {
SDP_WRITE_ALLOC_INT(timing->AdjustmentTime[j], 1, 0);
if (j+1 == timing->NbRepeatOffsets) {
SDP_WRITE_ALLOC_INT(timing->AdjustmentOffset[j], 0, 1);
} else {
SDP_WRITE_ALLOC_INT(timing->AdjustmentOffset[j], 1, 1);
}
}
SDP_WRITE_ALLOC_STR("\r\n", 0);
}
}
//k
if (sdp->k_method) {
SDP_WRITE_ALLOC_STR("k=", 0);
SDP_WRITE_ALLOC_STR(sdp->k_method, 0);
if (sdp->k_key) {
SDP_WRITE_ALLOC_STR(":", 0);
SDP_WRITE_ALLOC_STR(sdp->k_key, 0);
}
SDP_WRITE_ALLOC_STR("\r\n", 0);
}
//a=cat
TEST_SDP_WRITE_SINGLE("a=cat", sdp->a_cat, 1);
//a=keywds
TEST_SDP_WRITE_SINGLE("a=keywds", sdp->a_keywds, 1);
//a=tool
TEST_SDP_WRITE_SINGLE("a=tool", sdp->a_tool, 1);
//a=SendRecv
switch (sdp->a_SendReceive) {
case 1:
TEST_SDP_WRITE_SINGLE("a=", "recvonly", 0);
break;
case 2:
TEST_SDP_WRITE_SINGLE("a=", "sendonly", 0);
break;
case 3:
TEST_SDP_WRITE_SINGLE("a=", "sendrecv", 0);
break;
default:
break;
}
//a=type
TEST_SDP_WRITE_SINGLE("a=type", sdp->a_type, 1);
//a=charset
TEST_SDP_WRITE_SINGLE("a=charset", sdp->a_charset, 1);
//a=sdplang
TEST_SDP_WRITE_SINGLE("a=sdplang", sdp->a_sdplang, 1);
//a=lang
TEST_SDP_WRITE_SINGLE("a=lang", sdp->a_lang, 1);
//the rest
i=0;
while ((att = (GF_X_Attribute*)gf_list_enum(sdp->Attributes, &i))) {
SDP_WRITE_ALLOC_STR("a=", 0);
SDP_WRITE_ALLOC_STR(att->Name, 0);
if (att->Value) {
SDP_WRITE_ALLOC_STR(":", 0);
SDP_WRITE_ALLOC_STR(att->Value, 0);
}
SDP_WRITE_ALLOC_STR("\r\n", 0);
}
//now write media specific
i=0;
while ((media = (GF_SDPMedia*)gf_list_enum(sdp->media_desc, &i))) {
//m=
SDP_WRITE_ALLOC_STR("m=", 0);
switch (media->Type) {
case 1:
SDP_WRITE_ALLOC_STR("video", 1);
break;
case 2:
SDP_WRITE_ALLOC_STR("audio", 1);
break;
case 3:
SDP_WRITE_ALLOC_STR("data", 1);
break;
case 4:
SDP_WRITE_ALLOC_STR("control", 1);
break;
default:
SDP_WRITE_ALLOC_STR("application", 1);
break;
}
SDP_WRITE_ALLOC_INT(media->PortNumber, 0, 0);
if (media->NumPorts >= 2) {
SDP_WRITE_ALLOC_STR("/", 0);
SDP_WRITE_ALLOC_INT(media->NumPorts, 1, 0);
} else {
SDP_WRITE_ALLOC_STR(" ", 0);
}
SDP_WRITE_ALLOC_STR(media->Profile, 1);
SDP_WRITE_ALLOC_STR(media->fmt_list, 0);
j=0;
while ((map = (GF_RTPMap*)gf_list_enum(media->RTPMaps, &j))) {
SDP_WRITE_ALLOC_STR(" ", 0);
SDP_WRITE_ALLOC_INT(map->PayloadType, 0, 0);
}
SDP_WRITE_ALLOC_STR("\r\n", 0);
//c=
j=0;
while ((conn = (GF_SDPConnection*)gf_list_enum(media->Connections, &j))) {
SDP_WRITE_CONN(conn);
}
//k=
if (media->k_method) {
SDP_WRITE_ALLOC_STR("k=", 0);
SDP_WRITE_ALLOC_STR(media->k_method, 0);
if (media->k_key) {
SDP_WRITE_ALLOC_STR(":", 0);
SDP_WRITE_ALLOC_STR(media->k_key, 0);
}
SDP_WRITE_ALLOC_STR("\r\n", 0);
}
//b
j=0;
while ((bw = (GF_SDPBandwidth*)gf_list_enum(media->Bandwidths, &j))) {
SDP_WRITE_ALLOC_STR("b=", 0);
SDP_WRITE_ALLOC_STR(bw->name, 0);
SDP_WRITE_ALLOC_STR(":", 0);
SDP_WRITE_ALLOC_INT(bw->value, 0, 0);
SDP_WRITE_ALLOC_STR("\r\n", 0);
}
//a=rtpmap
j=0;
while ((map = (GF_RTPMap*)gf_list_enum(media->RTPMaps, &j))) {
SDP_WRITE_ALLOC_STR("a=rtpmap", 0);
SDP_WRITE_ALLOC_STR(":", 0);
SDP_WRITE_ALLOC_INT(map->PayloadType, 1, 0);
SDP_WRITE_ALLOC_STR(map->payload_name, 0);
SDP_WRITE_ALLOC_STR("/", 0);
SDP_WRITE_ALLOC_INT(map->ClockRate, 0, 0);
if (map->AudioChannels > 1) {
SDP_WRITE_ALLOC_STR("/", 0);
SDP_WRITE_ALLOC_INT(map->AudioChannels, 0, 0);
}
SDP_WRITE_ALLOC_STR("\r\n", 0);
}
//a=fmtp
j=0;
while ((fmtp = (GF_SDP_FMTP*)gf_list_enum(media->FMTP, &j))) {
SDP_WRITE_ALLOC_STR("a=fmtp:", 0);
SDP_WRITE_ALLOC_INT(fmtp->PayloadType, 1 , 0);
k=0;
while ((att = (GF_X_Attribute*)gf_list_enum(fmtp->Attributes, &k)) ) {
if (k>1) SDP_WRITE_ALLOC_STR(";", 0);
SDP_WRITE_ALLOC_STR(att->Name, 0);
if (att->Value) {
SDP_WRITE_ALLOC_STR("=", 0);
SDP_WRITE_ALLOC_STR(att->Value, 0);
}
}
SDP_WRITE_ALLOC_STR("\r\n", 0);
}
//a=ptime
if (media->PacketTime) {
SDP_WRITE_ALLOC_STR("a=ptime:", 0);
SDP_WRITE_ALLOC_INT(media->PacketTime, 0, 0);
SDP_WRITE_ALLOC_STR("\r\n", 0);
}
//a=FrameRate
if (media->Type == 1 && media->FrameRate) {
SDP_WRITE_ALLOC_STR("a=framerate:", 0);
SDP_WRITE_ALLOC_FLOAT(media->FrameRate, 0);
SDP_WRITE_ALLOC_STR("\r\n", 0);
}
//a=SendRecv
switch (media->SendReceive) {
case 1:
TEST_SDP_WRITE_SINGLE("a=", "recvonly", 0);
break;
case 2:
TEST_SDP_WRITE_SINGLE("a=", "sendonly", 0);
break;
case 3:
TEST_SDP_WRITE_SINGLE("a=", "sendrecv", 0);
break;
default:
break;
}
//a=orient
TEST_SDP_WRITE_SINGLE("a=orient", media->orientation, 1);
//a=sdplang
TEST_SDP_WRITE_SINGLE("a=sdplang", media->sdplang, 1);
//a=lang
TEST_SDP_WRITE_SINGLE("a=lang", media->lang, 1);
//a=quality
if (media->Quality >= 0) {
SDP_WRITE_ALLOC_STR("a=quality:", 0);
SDP_WRITE_ALLOC_INT(media->Quality, 0, 0);
SDP_WRITE_ALLOC_STR("\r\n", 0);
}
//the rest
j=0;
while ((att = (GF_X_Attribute*)gf_list_enum(media->Attributes, &j))) {
SDP_WRITE_ALLOC_STR("a=", 0);
SDP_WRITE_ALLOC_STR(att->Name, 0);
if (att->Value) {
SDP_WRITE_ALLOC_STR(":", 0);
SDP_WRITE_ALLOC_STR(att->Value, 0);
}
SDP_WRITE_ALLOC_STR("\r\n", 0);
}
}
//finally gf_realloc
//finall NULL char
pos += 1;
buf = (char *)gf_realloc(buf, pos);
*out_str_buf = buf;
return GF_OK;
}