| 1 | package cz.vutbr.feec.packets.rtcp; |
| 2 | |
| 3 | import cz.vutbr.feec.packets.IPacket; |
| 4 | import cz.vutbr.feec.packets.PacketGenerateException; |
| 5 | import cz.vutbr.feec.packets.PacketParseException; |
| 6 | import cz.vutbr.feec.packets.PacketUtils; |
| 7 | |
| 8 | public class GeneralRTCPHeader implements IPacket{ |
| 9 | private int version; |
| 10 | private int padding; |
| 11 | protected int reportCount; |
| 12 | private int payloadtype; |
| 13 | private int length; |
| 14 | private long SSRC; |
| 15 | public int getVersion() { |
| 16 | return version; |
| 17 | } |
| 18 | public void setVersion(int version) { |
| 19 | this.version = version; |
| 20 | } |
| 21 | public int getPadding() { |
| 22 | return padding; |
| 23 | } |
| 24 | public void setPadding(int padding) { |
| 25 | this.padding = padding; |
| 26 | } |
| 27 | public int getReportCount() { |
| 28 | return reportCount; |
| 29 | } |
| 30 | protected void setReportCount(int reportCount) { |
| 31 | this.reportCount = reportCount; |
| 32 | } |
| 33 | public int getPayloadtype() { |
| 34 | return payloadtype; |
| 35 | } |
| 36 | public void setPayloadtype(int payloadtype) { |
| 37 | this.payloadtype = payloadtype; |
| 38 | } |
| 39 | public int getLength() { |
| 40 | return length; |
| 41 | } |
| 42 | public void setLength(int length) { |
| 43 | this.length = length; |
| 44 | } |
| 45 | public long getSSRC() { |
| 46 | return SSRC; |
| 47 | } |
| 48 | public void setSSRC(long ssrc_ps) { |
| 49 | SSRC = ssrc_ps; |
| 50 | } |
| 51 | public int generate(byte[] buffer, int offset) |
| 52 | throws PacketGenerateException { |
| 53 | assert PacketUtils.checkSize(this.getVersion(), 2); |
| 54 | assert PacketUtils.checkSize(this.getPadding(), 1); |
| 55 | assert PacketUtils.checkSize(this.getReportCount(), 5); |
| 56 | assert PacketUtils.checkSize(this.getPayloadtype(), 8); |
| 57 | assert PacketUtils.checkSize(this.getLength(), 16); |
| 58 | |
| 59 | byte V_P_RC = (byte) ((this.getVersion() << 6) & 0xC0 | (this.getPadding() << 5) & 0x20 | (this.getReportCount() & 0x1F)); |
| 60 | buffer[offset] = V_P_RC; |
| 61 | |
| 62 | PacketUtils.setOctet1(buffer, offset+1, this.getPayloadtype()); |
| 63 | PacketUtils.setOctet2(buffer, offset+2, this.getLength()); |
| 64 | PacketUtils.setOctet4(buffer, offset+4, this.getSSRC()); |
| 65 | |
| 66 | return 8; |
| 67 | } |
| 68 | public int parse(byte[] buffer, int offset, int length) |
| 69 | throws PacketParseException { |
| 70 | int first = PacketUtils.getOctet1(buffer, offset); |
| 71 | this.setVersion((first & 0xC0) >> 6); |
| 72 | this.setPadding((first & 0x20) >> 5); |
| 73 | this.setReportCount(first & 0x1F); |
| 74 | |
| 75 | this.setPayloadtype(PacketUtils.getOctet1(buffer, offset+1)); |
| 76 | this.setLength(PacketUtils.getOctet2(buffer , offset+2)); |
| 77 | this.setSSRC(PacketUtils.getOctet4(buffer, offset+4)); |
| 78 | |
| 79 | return 8; |
| 80 | } |
| 81 | |
| 82 | |
| 83 | } |