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-rw-r--r--stream/realrtsp/sdpplin.c366
1 files changed, 366 insertions, 0 deletions
diff --git a/stream/realrtsp/sdpplin.c b/stream/realrtsp/sdpplin.c
new file mode 100644
index 0000000000..359fe10678
--- /dev/null
+++ b/stream/realrtsp/sdpplin.c
@@ -0,0 +1,366 @@
+/*
+ * This file was ported to MPlayer from xine CVS sdpplin.c,v 1.1 2002/12/24 01:30:22
+ */
+
+/*
+ * Copyright (C) 2002 the xine project
+ *
+ * This file is part of xine, a free video player.
+ *
+ * xine is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * xine is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ *
+ *
+ * sdp/sdpplin parser.
+ *
+ */
+
+#include "config.h"
+#include "../librtsp/rtsp.h"
+#include "sdpplin.h"
+#include "xbuffer.h"
+#include "mp_msg.h"
+
+/*
+#define LOG
+*/
+
+/*
+ * Decodes base64 strings (based upon b64 package)
+ */
+
+static char *b64_decode(const char *in, char *out, int *size)
+{
+ char dtable[256]; /* Encode / decode table */
+ int i,j,k;
+
+ for (i = 0; i < 255; i++) {
+ dtable[i] = 0x80;
+ }
+ for (i = 'A'; i <= 'Z'; i++) {
+ dtable[i] = 0 + (i - 'A');
+ }
+ for (i = 'a'; i <= 'z'; i++) {
+ dtable[i] = 26 + (i - 'a');
+ }
+ for (i = '0'; i <= '9'; i++) {
+ dtable[i] = 52 + (i - '0');
+ }
+ dtable['+'] = 62;
+ dtable['/'] = 63;
+ dtable['='] = 0;
+
+ k=0;
+
+ /*CONSTANTCONDITION*/
+ for (j=0; j<strlen(in); j+=4)
+ {
+ char a[4], b[4];
+
+ for (i = 0; i < 4; i++) {
+ int c = in[i+j];
+
+ if (dtable[c] & 0x80) {
+ printf("Illegal character '%c' in input.\n", c);
+// exit(1);
+ return NULL;
+ }
+ a[i] = (char) c;
+ b[i] = (char) dtable[c];
+ }
+ out = xbuffer_ensure_size(out, k+4);
+ out[k++] = (b[0] << 2) | (b[1] >> 4);
+ out[k++] = (b[1] << 4) | (b[2] >> 2);
+ out[k++] = (b[2] << 6) | b[3];
+ i = a[2] == '=' ? 1 : (a[3] == '=' ? 2 : 3);
+ if (i < 3) {
+ out[k]=0;
+ *size=k;
+ return out;
+ }
+ }
+ out[k]=0;
+ *size=k;
+ return out;
+}
+
+static char *nl(char *data) {
+
+ char *nlptr = (data) ? strchr(data,'\n') : NULL;
+ return (nlptr) ? nlptr + 1 : NULL;
+}
+
+static int filter(const char *in, const char *filter, char **out) {
+
+ int flen=strlen(filter);
+ int len;
+
+ if (!in)
+ return 0;
+
+ len = (strchr(in,'\n')) ? strchr(in,'\n')-in : strlen(in);
+
+ if (!strncmp(in,filter,flen))
+ {
+ if(in[flen]=='"') flen++;
+ if(in[len-1]==13) len--;
+ if(in[len-1]=='"') len--;
+ *out = xbuffer_copyin(*out, 0, in+flen, len-flen+1);
+ (*out)[len-flen]=0;
+
+ return len-flen;
+ }
+
+ return 0;
+}
+static sdpplin_stream_t *sdpplin_parse_stream(char **data) {
+
+ sdpplin_stream_t *desc=calloc(1,sizeof(sdpplin_stream_t));
+ char *buf=xbuffer_init(32);
+ char *decoded=xbuffer_init(32);
+ int handled;
+ int got_mimetype;
+
+ if (filter(*data, "m=", &buf)) {
+ desc->id = strdup(buf);
+ } else
+ {
+ printf("sdpplin: no m= found.\n");
+ free(desc);
+ xbuffer_free(buf);
+ return NULL;
+ }
+ *data=nl(*data);
+
+ got_mimetype = 0;
+
+ while (*data && **data && *data[0]!='m') {
+#ifdef LOG
+ {
+ int len=strchr(*data,'\n')-(*data);
+ buf = xbuffer_copyin(buf, 0, *data, len+1);
+ buf[len]=0;
+ printf("libreal: sdpplin_stream: '%s'\n", buf);
+ }
+#endif
+
+ handled=0;
+
+ if(filter(*data,"a=control:streamid=",&buf)) {
+ desc->stream_id=atoi(buf);
+ handled=1;
+ *data=nl(*data);
+ }
+
+ if(filter(*data,"a=MaxBitRate:integer;",&buf)) {
+ desc->max_bit_rate=atoi(buf);
+ if (!desc->avg_bit_rate)
+ desc->avg_bit_rate=desc->max_bit_rate;
+ handled=1;
+ *data=nl(*data);
+ }
+
+ if(filter(*data,"a=MaxPacketSize:integer;",&buf)) {
+ desc->max_packet_size=atoi(buf);
+ if (!desc->avg_packet_size)
+ desc->avg_packet_size=desc->max_packet_size;
+ handled=1;
+ *data=nl(*data);
+ }
+
+ if(filter(*data,"a=StartTime:integer;",&buf)) {
+ desc->start_time=atoi(buf);
+ handled=1;
+ *data=nl(*data);
+ }
+
+ if(filter(*data,"a=Preroll:integer;",&buf)) {
+ desc->preroll=atoi(buf);
+ handled=1;
+ *data=nl(*data);
+ }
+
+ if(filter(*data,"a=length:npt=",&buf)) {
+ desc->duration=(uint32_t)(atof(buf)*1000);
+ handled=1;
+ *data=nl(*data);
+ }
+
+ if(filter(*data,"a=StreamName:string;",&buf)) {
+ desc->stream_name=strdup(buf);
+ desc->stream_name_size=strlen(desc->stream_name);
+ handled=1;
+ *data=nl(*data);
+ }
+
+ if(filter(*data,"a=mimetype:string;",&buf)) {
+ desc->mime_type=strdup(buf);
+ desc->mime_type_size=strlen(desc->mime_type);
+ handled=1;
+ got_mimetype = 1;
+ *data=nl(*data);
+ }
+
+ if(filter(*data,"a=OpaqueData:buffer;",&buf)) {
+ decoded = b64_decode(buf, decoded, &(desc->mlti_data_size));
+ desc->mlti_data=malloc(desc->mlti_data_size);
+ memcpy(desc->mlti_data, decoded, desc->mlti_data_size);
+ handled=1;
+ *data=nl(*data);
+#ifdef LOG
+ printf("mlti_data_size: %i\n", desc->mlti_data_size);
+#endif
+ }
+
+ if(filter(*data,"a=ASMRuleBook:string;",&buf)) {
+ desc->asm_rule_book=strdup(buf);
+ handled=1;
+ *data=nl(*data);
+ }
+
+ if(!handled) {
+#ifdef LOG
+ int len=strchr(*data,'\n')-(*data);
+ buf = xbuffer_copyin(buf, 0, *data, len+1);
+ buf[len]=0;
+ printf("libreal: sdpplin_stream: not handled: '%s'\n", buf);
+#endif
+ *data=nl(*data);
+ }
+ }
+
+ if (!got_mimetype) {
+ mp_msg(MSGT_OPEN, MSGL_V, "libreal: sdpplin_stream: no mimetype\n");
+ desc->mime_type = strdup("audio/x-pn-realaudio");
+ desc->mime_type_size = strlen(desc->mime_type);
+ if (desc->stream_id)
+ mp_msg(MSGT_OPEN, MSGL_WARN, "libreal: sdpplin_stream: implicit mimetype for stream_id != 0, weird.\n");
+ }
+
+ xbuffer_free(buf);
+ xbuffer_free(decoded);
+
+ return desc;
+}
+
+sdpplin_t *sdpplin_parse(char *data) {
+
+ sdpplin_t *desc=calloc(1,sizeof(sdpplin_t));
+ char *buf=xbuffer_init(32);
+ char *decoded=xbuffer_init(32);
+ int handled;
+ int len;
+
+ while (data && *data) {
+#ifdef LOG
+ {
+ int len=strchr(data,'\n')-(data);
+ buf = xbuffer_copyin(buf, 0, data, len+1);
+ buf[len]=0;
+ printf("libreal: sdpplin: '%s'\n", buf);
+ }
+#endif
+
+ handled=0;
+
+ if (filter(data, "m=", &buf)) {
+ sdpplin_stream_t *stream=sdpplin_parse_stream(&data);
+#ifdef LOG
+ printf("got data for stream id %u\n", stream->stream_id);
+#endif
+ if (desc->stream && (stream->stream_id >= 0) && (stream->stream_id < desc->stream_count))
+ desc->stream[stream->stream_id]=stream;
+ else if (desc->stream)
+ {
+ mp_msg(MSGT_OPEN, MSGL_ERR, "sdpplin: bad stream_id %d (must be >= 0, < %d). Broken sdp?\n",
+ stream->stream_id, desc->stream_count);
+ free(stream);
+ } else {
+ mp_msg(MSGT_OPEN, MSGL_V, "sdpplin: got 'm=', but 'a=StreamCount' is still unknown.\n");
+ if (stream->stream_id == 0) {
+ desc->stream_count=1;
+ desc->stream=malloc(sizeof(sdpplin_stream_t*));
+ desc->stream[0]=stream;
+ } else {
+ mp_msg(MSGT_OPEN, MSGL_ERR, "sdpplin: got 'm=', but 'a=StreamCount' is still unknown and stream_id != 0. Broken sdp?\n");
+ free(stream);
+ }
+ }
+ continue;
+ }
+
+ if(filter(data,"a=Title:buffer;",&buf)) {
+ decoded=b64_decode(buf, decoded, &len);
+ desc->title=strdup(decoded);
+ handled=1;
+ data=nl(data);
+ }
+
+ if(filter(data,"a=Author:buffer;",&buf)) {
+ decoded=b64_decode(buf, decoded, &len);
+ desc->author=strdup(decoded);
+ handled=1;
+ data=nl(data);
+ }
+
+ if(filter(data,"a=Copyright:buffer;",&buf)) {
+ decoded=b64_decode(buf, decoded, &len);
+ desc->copyright=strdup(decoded);
+ handled=1;
+ data=nl(data);
+ }
+
+ if(filter(data,"a=Abstract:buffer;",&buf)) {
+ decoded=b64_decode(buf, decoded, &len);
+ desc->abstract=strdup(decoded);
+ handled=1;
+ data=nl(data);
+ }
+
+ if(filter(data,"a=StreamCount:integer;",&buf)) {
+ desc->stream_count=(unsigned int)atoi(buf);
+ desc->stream=malloc(sizeof(sdpplin_stream_t*)*desc->stream_count);
+ handled=1;
+ data=nl(data);
+ }
+
+ if(filter(data,"a=Flags:integer;",&buf)) {
+ desc->flags=atoi(buf);
+ handled=1;
+ data=nl(data);
+ }
+
+ if(!handled) {
+#ifdef LOG
+ int len=strchr(data,'\n')-data;
+ buf = xbuffer_copyin(buf, 0, data, len+1);
+ buf[len]=0;
+ printf("libreal: sdpplin: not handled: '%s'\n", buf);
+#endif
+ data=nl(data);
+ }
+ }
+
+ xbuffer_free(buf);
+ xbuffer_free(decoded);
+
+ return desc;
+}
+
+void sdpplin_free(sdpplin_t *description) {
+
+ /* TODO: free strings */
+ free(description);
+}
+