240 lines
10 KiB
C++
240 lines
10 KiB
C++
#include "chunkstream.cpp" //chunkstream decoding
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#include "amf.cpp" //simple AMF0 parsing
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//gets and parses one chunk
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void parseChunk(){
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static chunkpack next;
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static AMFType amfdata("empty", (unsigned char)0xFF);
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static AMFType amfelem("empty", (unsigned char)0xFF);
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next = getWholeChunk();
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switch (next.msg_type_id){
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case 0://does not exist
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break;//happens when connection breaks unexpectedly
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case 1://set chunk size
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chunk_rec_max = ntohl(*(int*)next.data);
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#ifdef DEBUG
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fprintf(stderr, "CTRL: Set chunk size: %i\n", chunk_rec_max);
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#endif
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break;
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case 2://abort message - we ignore this one
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#ifdef DEBUG
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fprintf(stderr, "CTRL: Abort message\n");
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#endif
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//4 bytes of stream id to drop
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break;
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case 3://ack
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#ifdef DEBUG
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fprintf(stderr, "CTRL: Acknowledgement\n");
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#endif
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snd_window_at = ntohl(*(int*)next.data);
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snd_window_at = snd_cnt;
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break;
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case 4:{
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#ifdef DEBUG
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short int ucmtype = ntohs(*(short int*)next.data);
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fprintf(stderr, "CTRL: User control message %hi\n", ucmtype);
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#endif
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//2 bytes event type, rest = event data
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//types:
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//0 = stream begin, 4 bytes ID
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//1 = stream EOF, 4 bytes ID
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//2 = stream dry, 4 bytes ID
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//3 = setbufferlen, 4 bytes ID, 4 bytes length
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//4 = streamisrecorded, 4 bytes ID
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//6 = pingrequest, 4 bytes data
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//7 = pingresponse, 4 bytes data
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//we don't need to process this
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} break;
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case 5://window size of other end
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#ifdef DEBUG
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fprintf(stderr, "CTRL: Window size\n");
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#endif
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rec_window_size = ntohl(*(int*)next.data);
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rec_window_at = rec_cnt;
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SendCTL(3, rec_cnt);//send ack (msg 3)
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break;
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case 6:
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#ifdef DEBUG
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fprintf(stderr, "CTRL: Set peer bandwidth\n");
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#endif
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//4 bytes window size, 1 byte limit type (ignored)
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snd_window_size = ntohl(*(int*)next.data);
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SendCTL(5, snd_window_size);//send window acknowledgement size (msg 5)
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break;
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case 8:
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#ifdef DEBUG
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fprintf(stderr, "Received audio data\n");
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#endif
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break;
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case 9:
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#ifdef DEBUG
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fprintf(stderr, "Received video data\n");
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#endif
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break;
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case 15:
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#ifdef DEBUG
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fprintf(stderr, "Received AFM3 data message\n");
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#endif
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break;
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case 16:
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#ifdef DEBUG
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fprintf(stderr, "Received AFM3 shared object\n");
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#endif
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break;
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case 17:
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#ifdef DEBUG
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fprintf(stderr, "Received AFM3 command message\n");
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#endif
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break;
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case 18:
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#ifdef DEBUG
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fprintf(stderr, "Received AFM0 data message\n");
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#endif
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break;
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case 19:
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#ifdef DEBUG
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fprintf(stderr, "Received AFM0 shared object\n");
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#endif
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break;
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case 20:{//AMF0 command message
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bool parsed = false;
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amfdata = parseAMF(next.data, next.real_len);
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#ifdef DEBUG
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fprintf(stderr, "Received AFM0 command message:\n");
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amfdata.Print();
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#endif
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if (amfdata.getContentP(0)->StrValue() == "connect"){
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#ifdef DEBUG
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int tmpint;
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tmpint = amfdata.getContentP(2)->getContentP("videoCodecs")->NumValue();
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if (tmpint & 0x04){fprintf(stderr, "Sorensen video support detected\n");}
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if (tmpint & 0x80){fprintf(stderr, "H264 video support detected\n");}
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tmpint = amfdata.getContentP(2)->getContentP("audioCodecs")->NumValue();
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if (tmpint & 0x04){fprintf(stderr, "MP3 audio support detected\n");}
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if (tmpint & 0x400){fprintf(stderr, "AAC video support detected\n");}
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#endif
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SendCTL(6, rec_window_size, 0);//send peer bandwidth (msg 6)
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SendCTL(5, snd_window_size);//send window acknowledgement size (msg 5)
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SendUSR(0, 0);//send UCM StreamBegin (0), stream 0
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//send a _result reply
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AMFType amfreply("container", (unsigned char)0xFF);
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amfreply.addContent(AMFType("", "_result"));//result success
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amfreply.addContent(amfdata.getContent(1));//same transaction ID
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// amfreply.addContent(AMFType("", (double)0, 0x05));//null - command info
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amfreply.addContent(AMFType(""));//server properties
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amfreply.getContentP(2)->addContent(AMFType("fmsVer", "FMS/3,0,1,123"));//stolen from examples
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amfreply.getContentP(2)->addContent(AMFType("capabilities", (double)31));//stolen from examples
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amfreply.addContent(AMFType(""));//info
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amfreply.getContentP(3)->addContent(AMFType("level", "status"));
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amfreply.getContentP(3)->addContent(AMFType("code", "NetConnection.Connect.Success"));
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amfreply.getContentP(3)->addContent(AMFType("description", "Connection succeeded."));
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amfreply.getContentP(3)->addContent(AMFType("capabilities", (double)33));//from red5 server
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amfreply.getContentP(3)->addContent(AMFType("fmsVer", "PLS/1,0,0,0"));//from red5 server
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SendChunk(3, 20, next.msg_stream_id, amfreply.Pack());
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//send onBWDone packet
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//amfreply = AMFType("container", (unsigned char)0xFF);
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//amfreply.addContent(AMFType("", "onBWDone"));//result success
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//amfreply.addContent(AMFType("", (double)0));//zero
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//amfreply.addContent(AMFType("", (double)0, 0x05));//null
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//SendChunk(3, 20, next.msg_stream_id, amfreply.Pack());
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parsed = true;
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}//connect
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if (amfdata.getContentP(0)->StrValue() == "createStream"){
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//send a _result reply
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AMFType amfreply("container", (unsigned char)0xFF);
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amfreply.addContent(AMFType("", "_result"));//result success
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amfreply.addContent(amfdata.getContent(1));//same transaction ID
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amfreply.addContent(AMFType("", (double)0, 0x05));//null - command info
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amfreply.addContent(AMFType("", (double)1));//stream ID - we use 1
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SendChunk(3, 20, next.msg_stream_id, amfreply.Pack());
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#ifdef DEBUG
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fprintf(stderr, "AMF0 command: createStream result\n");
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#endif
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parsed = true;
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}//createStream
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if ((amfdata.getContentP(0)->StrValue() == "getStreamLength") || (amfdata.getContentP(0)->StrValue() == "getMovLen")){
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//send a _result reply
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AMFType amfreply("container", (unsigned char)0xFF);
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amfreply.addContent(AMFType("", "_result"));//result success
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amfreply.addContent(amfdata.getContent(1));//same transaction ID
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amfreply.addContent(AMFType("", (double)0, 0x05));//null - command info
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amfreply.addContent(AMFType("", (double)0));//zero length
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SendChunk(3, 20, next.msg_stream_id, amfreply.Pack());
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#ifdef DEBUG
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fprintf(stderr, "AMF0 command: getStreamLength result\n");
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#endif
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parsed = true;
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}//getStreamLength
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if (amfdata.getContentP(0)->StrValue() == "checkBandwidth"){
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//send a _result reply
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AMFType amfreply("container", (unsigned char)0xFF);
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amfreply.addContent(AMFType("", "_result"));//result success
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amfreply.addContent(amfdata.getContent(1));//same transaction ID
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amfreply.addContent(AMFType("", (double)0, 0x05));//null - command info
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amfreply.addContent(AMFType("", (double)0, 0x05));//null - command info
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SendChunk(3, 20, 1, amfreply.Pack());
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#ifdef DEBUG
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fprintf(stderr, "AMF0 command: checkBandwidth result\n");
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#endif
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parsed = true;
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}//checkBandwidth
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if ((amfdata.getContentP(0)->StrValue() == "play") || (amfdata.getContentP(0)->StrValue() == "play2")){
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//send streambegin
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SendUSR(0, 1);//send UCM StreamBegin (0), stream 1
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//send a status reply
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AMFType amfreply("container", (unsigned char)0xFF);
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amfreply.addContent(AMFType("", "onStatus"));//status reply
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amfreply.addContent(amfdata.getContent(1));//same transaction ID
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amfreply.addContent(AMFType("", (double)0, 0x05));//null - command info
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amfreply.addContent(AMFType(""));//info
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amfreply.getContentP(3)->addContent(AMFType("level", "status"));
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amfreply.getContentP(3)->addContent(AMFType("code", "NetStream.Play.Reset"));
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amfreply.getContentP(3)->addContent(AMFType("description", "Playing and resetting..."));
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amfreply.getContentP(3)->addContent(AMFType("details", "PLS"));
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amfreply.getContentP(3)->addContent(AMFType("clientid", (double)1));
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SendChunk(4, 20, next.msg_stream_id, amfreply.Pack());
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amfreply = AMFType("container", (unsigned char)0xFF);
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amfreply.addContent(AMFType("", "onStatus"));//status reply
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amfreply.addContent(amfdata.getContent(1));//same transaction ID
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amfreply.addContent(AMFType("", (double)0, 0x05));//null - command info
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amfreply.addContent(AMFType(""));//info
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amfreply.getContentP(3)->addContent(AMFType("level", "status"));
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amfreply.getContentP(3)->addContent(AMFType("code", "NetStream.Play.Start"));
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amfreply.getContentP(3)->addContent(AMFType("description", "Playing!"));
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amfreply.getContentP(3)->addContent(AMFType("details", "PLS"));
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amfreply.getContentP(3)->addContent(AMFType("clientid", (double)1));
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SendChunk(4, 20, 1, amfreply.Pack());
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//No clue what this does. Most real servers send it, though...
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// amfreply = AMFType("container", (unsigned char)0xFF);
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// amfreply.addContent(AMFType("", "|RtmpSampleAccess"));//status reply
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// amfreply.addContent(AMFType("", (double)1, 0x01));//bool true - audioaccess
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// amfreply.addContent(AMFType("", (double)1, 0x01));//bool true - videoaccess
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// SendChunk(4, 20, next.msg_stream_id, amfreply.Pack());
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chunk_snd_max = 1024*1024;
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SendCTL(1, chunk_snd_max);//send chunk size max (msg 1)
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ready4data = true;//start sending video data!
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#ifdef DEBUG
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fprintf(stderr, "AMF0 command: play result\n");
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#endif
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parsed = true;
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}//createStream
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if (!parsed){
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#ifdef DEBUG
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fprintf(stderr, "AMF0 command not processed! :(\n");
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#endif
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}
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} break;
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case 22:
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#ifdef DEBUG
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fprintf(stderr, "Received aggregate message\n");
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#endif
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break;
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default:
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#ifdef DEBUG
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fprintf(stderr, "Unknown chunk received! Probably protocol corruption, stopping parsing of incoming data.\n");
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#endif
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stopparsing = true;
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break;
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}
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}//parseChunk
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