Cameron Gutman
97 lines
3.9 KiB
Java
97 lines
3.9 KiB
Java
package com.limelight.nvstream.rtsp;
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import java.net.InetAddress;
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import java.net.Inet6Address;
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import java.nio.ByteBuffer;
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import java.nio.ByteOrder;
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import com.limelight.nvstream.StreamConfiguration;
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public class SdpGenerator {
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private static void addSessionAttributeBytes(StringBuilder config, String attribute, byte[] value) {
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char str[] = new char[value.length];
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for (int i = 0; i < value.length; i++) {
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str[i] = (char)value[i];
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}
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addSessionAttribute(config, attribute, new String(str));
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}
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private static void addSessionAttributeInt(StringBuilder config, String attribute, int value) {
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ByteBuffer b = ByteBuffer.allocate(4).order(ByteOrder.LITTLE_ENDIAN);
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b.putInt(value);
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addSessionAttributeBytes(config, attribute, b.array());
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}
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private static void addSessionAttribute(StringBuilder config, String attribute, String value) {
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config.append("a="+attribute+":"+value+" \r\n");
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}
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public static String generateSdpFromConfig(InetAddress host, StreamConfiguration sc) {
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StringBuilder config = new StringBuilder();
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config.append("v=0").append("\r\n"); // SDP Version 0
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config.append("o=android 0 "+RtspConnection.CLIENT_VERSION+" IN ");
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if (host instanceof Inet6Address) {
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config.append("IPv6 ");
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}
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else {
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config.append("IPv4 ");
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}
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config.append(host.getHostAddress());
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config.append("\r\n");
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config.append("s=NVIDIA Streaming Client").append("\r\n");
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addSessionAttribute(config, "x-nv-general.serverAddress", host.getHostAddress());
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addSessionAttributeInt(config, "x-nv-general.featureFlags", 0x42774141);
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addSessionAttribute(config, "x-nv-video[0].clientViewportWd", ""+sc.getWidth());
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addSessionAttribute(config, "x-nv-video[0].clientViewportHt", ""+sc.getHeight());
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addSessionAttribute(config, "x-nv-video[0].maxFPS", ""+sc.getRefreshRate());
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addSessionAttributeInt(config, "x-nv-video[0].transferProtocol", 0x41514120);
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addSessionAttributeInt(config, "x-nv-video[1].transferProtocol", 0x41514120);
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addSessionAttributeInt(config, "x-nv-video[2].transferProtocol", 0x41514120);
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addSessionAttributeInt(config, "x-nv-video[3].transferProtocol", 0x41514120);
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addSessionAttributeInt(config, "x-nv-video[0].rateControlMode", 0x42414141);
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addSessionAttributeInt(config, "x-nv-video[1].rateControlMode", 0x42514141);
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addSessionAttributeInt(config, "x-nv-video[2].rateControlMode", 0x42514141);
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addSessionAttributeInt(config, "x-nv-video[3].rateControlMode", 0x42514141);
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addSessionAttribute(config, "x-nv-video[0].timeoutLengthMs", "7000");
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addSessionAttribute(config, "x-nv-video[0].framesWithInvalidRefThreshold", "0");
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// It should be 16183 but adding 100 but causes resolution to scale in the beginning
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// The bit 0x80 enables video scaling on packet loss which we can't support (for now)
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addSessionAttribute(config, "x-nv-vqos[0].bw.flags", "16083");
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addSessionAttribute(config, "x-nv-vqos[0].bw.maximumBitrate", ""+sc.getBitrate());
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// Since we can only deal with FEC data on a 1 packet frame,
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// restrict FEC repair percentage to minimum so we get only 1
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// FEC packet per frame
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addSessionAttribute(config, "x-nv-vqos[0].fec.repairPercent", "1");
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addSessionAttribute(config, "x-nv-vqos[0].fec.repairMaxPercent", "1");
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addSessionAttribute(config, "x-nv-vqos[0].fec.repairMinPercent", "1");
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addSessionAttribute(config, "x-nv-vqos[0].videoQualityScoreUpdateTime", "5000");
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addSessionAttribute(config, "x-nv-vqos[0].qosTrafficType", "5");
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addSessionAttribute(config, "x-nv-vqos[0].videoQosMaxConsecutiveDrops", "0");
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addSessionAttribute(config, "x-nv-vqos[1].videoQosMaxConsecutiveDrops", "0");
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addSessionAttribute(config, "x-nv-vqos[2].videoQosMaxConsecutiveDrops", "0");
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addSessionAttribute(config, "x-nv-vqos[3].videoQosMaxConsecutiveDrops", "0");
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addSessionAttribute(config, "x-nv-aqos.qosTrafficType", "8");
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config.append("t=0 0").append("\r\n");
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config.append("m=video 47996 ").append("\r\n");
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return config.toString();
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}
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}
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