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authorMarvin W <git@larma.de>2021-03-21 12:41:38 +0100
committerMarvin W <git@larma.de>2021-03-21 12:41:38 +0100
commitef2e3c774cab82a94a5e34399f2013d64c3cf03b (patch)
treedee0b7184eb2e225593508d74b25a8228e35144f /plugins/rtp/src/codec_util.vala
parente6a933ad307116952d3202c36d0a8d6e7f4b0946 (diff)
downloaddino-ef2e3c774cab82a94a5e34399f2013d64c3cf03b.tar.gz
dino-ef2e3c774cab82a94a5e34399f2013d64c3cf03b.zip
Add RTP implementation as plugin
Diffstat (limited to 'plugins/rtp/src/codec_util.vala')
-rw-r--r--plugins/rtp/src/codec_util.vala245
1 files changed, 245 insertions, 0 deletions
diff --git a/plugins/rtp/src/codec_util.vala b/plugins/rtp/src/codec_util.vala
new file mode 100644
index 00000000..e419b5ad
--- /dev/null
+++ b/plugins/rtp/src/codec_util.vala
@@ -0,0 +1,245 @@
+using Gee;
+using Xmpp;
+using Xmpp.Xep;
+
+public class Dino.Plugins.Rtp.CodecUtil {
+ private Set<string> supported_elements = new HashSet<string>();
+ private Set<string> unsupported_elements = new HashSet<string>();
+
+ public static Gst.Caps get_caps(string media, JingleRtp.PayloadType payload_type) {
+ Gst.Caps caps = new Gst.Caps.simple("application/x-rtp",
+ "media", typeof(string), media,
+ "payload", typeof(int), payload_type.id);
+ //"channels", typeof(int), payloadType.channels,
+ //"max-ptime", typeof(int), payloadType.maxptime);
+ unowned Gst.Structure s = caps.get_structure(0);
+ if (payload_type.clockrate != 0) {
+ s.set("clock-rate", typeof(int), payload_type.clockrate);
+ }
+ if (payload_type.name != null) {
+ s.set("encoding-name", typeof(string), payload_type.name.up());
+ }
+ return caps;
+ }
+
+ public static string? get_codec_from_payload(string media, JingleRtp.PayloadType payload_type) {
+ if (payload_type.name != null) return payload_type.name.down();
+ if (media == "audio") {
+ switch (payload_type.id) {
+ case 0:
+ return "pcmu";
+ case 8:
+ return "pcma";
+ }
+ }
+ return null;
+ }
+
+ public static string? get_media_type_from_payload(string media, JingleRtp.PayloadType payload_type) {
+ return get_media_type(media, get_codec_from_payload(media, payload_type));
+ }
+
+ public static string? get_media_type(string media, string? codec) {
+ if (codec == null) return null;
+ if (media == "audio") {
+ switch (codec) {
+ case "pcma":
+ return "audio/x-alaw";
+ case "pcmu":
+ return "audio/x-mulaw";
+ }
+ }
+ return @"$media/x-$codec";
+ }
+
+ public static string? get_rtp_pay_element_name_from_payload(string media, JingleRtp.PayloadType payload_type) {
+ return get_pay_candidate(media, get_codec_from_payload(media, payload_type));
+ }
+
+ public static string? get_pay_candidate(string media, string? codec) {
+ if (codec == null) return null;
+ return @"rtp$(codec)pay";
+ }
+
+ public static string? get_rtp_depay_element_name_from_payload(string media, JingleRtp.PayloadType payload_type) {
+ return get_depay_candidate(media, get_codec_from_payload(media, payload_type));
+ }
+
+ public static string? get_depay_candidate(string media, string? codec) {
+ if (codec == null) return null;
+ return @"rtp$(codec)depay";
+ }
+
+ public static string[] get_encode_candidates(string media, string? codec) {
+ if (codec == null) return new string[0];
+ if (media == "audio") {
+ switch (codec) {
+ case "opus":
+ return new string[] {"opusenc"};
+ case "speex":
+ return new string[] {"speexenc"};
+ case "pcma":
+ return new string[] {"alawenc"};
+ case "pcmu":
+ return new string[] {"mulawenc"};
+ }
+ } else if (media == "video") {
+ switch (codec) {
+ case "h264":
+ return new string[] {/*"msdkh264enc", */"vaapih264enc", "x264enc"};
+ case "vp9":
+ return new string[] {/*"msdkvp9enc", */"vaapivp9enc" /*, "vp9enc" */};
+ case "vp8":
+ return new string[] {/*"msdkvp8enc", */"vaapivp8enc", "vp8enc"};
+ }
+ }
+ return new string[0];
+ }
+
+ public static string[] get_decode_candidates(string media, string? codec) {
+ if (codec == null) return new string[0];
+ if (media == "audio") {
+ switch (codec) {
+ case "opus":
+ return new string[] {"opusdec"};
+ case "speex":
+ return new string[] {"speexdec"};
+ case "pcma":
+ return new string[] {"alawdec"};
+ case "pcmu":
+ return new string[] {"mulawdec"};
+ }
+ } else if (media == "video") {
+ switch (codec) {
+ case "h264":
+ return new string[] {/*"msdkh264dec", */"vaapih264dec"};
+ case "vp9":
+ return new string[] {/*"msdkvp9dec", */"vaapivp9dec", "vp9dec"};
+ case "vp8":
+ return new string[] {/*"msdkvp8dec", */"vaapivp8dec", "vp8dec"};
+ }
+ }
+ return new string[0];
+ }
+
+ public static string? get_encode_prefix(string media, string codec, string encode) {
+ if (encode == "msdkh264enc") return "video/x-raw,format=NV12 ! ";
+ if (encode == "vaapih264enc") return "video/x-raw,format=NV12 ! ";
+ return null;
+ }
+
+ public static string? get_encode_suffix(string media, string codec, string encode) {
+ // H264
+ const string h264_suffix = " ! video/x-h264,profile=constrained-baseline ! h264parse";
+ if (encode == "msdkh264enc") return @" bitrate=256 rate-control=vbr target-usage=7$h264_suffix";
+ if (encode == "vaapih264enc") return @" bitrate=256 quality-level=7 tune=low-power$h264_suffix";
+ if (encode == "x264enc") return @" byte-stream=1 bitrate=256 profile=baseline speed-preset=ultrafast tune=zerolatency$h264_suffix";
+ if (media == "video" && codec == "h264") return h264_suffix;
+
+ // VP8
+ if (encode == "msdkvp8enc") return " bitrate=256 rate-control=vbr target-usage=7";
+ if (encode == "vaapivp8enc") return " bitrate=256 rate-control=vbr quality-level=7";
+ if (encode == "vp8enc") return " target-bitrate=256000 deadline=1 error-resilient=1";
+
+ // OPUS
+ if (encode == "opusenc") return " audio-type=voice";
+
+ return null;
+ }
+
+ public static string? get_decode_prefix(string media, string codec, string decode) {
+ return null;
+ }
+
+ public bool is_element_supported(string element_name) {
+ if (unsupported_elements.contains(element_name)) return false;
+ if (supported_elements.contains(element_name)) return true;
+ var test_element = Gst.ElementFactory.make(element_name, @"test-$element_name");
+ if (test_element != null) {
+ supported_elements.add(element_name);
+ return true;
+ } else {
+ debug("%s is not supported on this platform", element_name);
+ unsupported_elements.add(element_name);
+ return false;
+ }
+ }
+
+ public string? get_encode_element_name(string media, string? codec) {
+ foreach (string candidate in get_encode_candidates(media, codec)) {
+ if (is_element_supported(candidate)) return candidate;
+ }
+ return null;
+ }
+
+ public string? get_pay_element_name(string media, string? codec) {
+ string candidate = get_pay_candidate(media, codec);
+ if (is_element_supported(candidate)) return candidate;
+ return null;
+ }
+
+ public string? get_decode_element_name(string media, string? codec) {
+ foreach (string candidate in get_decode_candidates(media, codec)) {
+ if (is_element_supported(candidate)) return candidate;
+ }
+ return null;
+ }
+
+ public string? get_depay_element_name(string media, string? codec) {
+ string candidate = get_depay_candidate(media, codec);
+ if (is_element_supported(candidate)) return candidate;
+ return null;
+ }
+
+ public void mark_element_unsupported(string element_name) {
+ unsupported_elements.add(element_name);
+ }
+
+ public string? get_decode_bin_description(string media, string? codec, string? element_name = null, string? name = null) {
+ if (codec == null) return null;
+ string base_name = name ?? @"encode-$codec-$(Random.next_int())";
+ string depay = get_depay_element_name(media, codec);
+ string decode = element_name ?? get_decode_element_name(media, codec);
+ if (depay == null || decode == null) return null;
+ string decode_prefix = get_decode_prefix(media, codec, decode) ?? "";
+ return @"$depay name=$base_name-rtp-depay ! $decode_prefix$decode name=$base_name-decode ! $(media)convert name=$base_name-convert";
+ }
+
+ public Gst.Element? get_decode_bin(string media, JingleRtp.PayloadType payload_type, string? name = null) {
+ string? codec = get_codec_from_payload(media, payload_type);
+ string base_name = name ?? @"encode-$codec-$(Random.next_int())";
+ string? desc = get_decode_bin_description(media, codec, null, base_name);
+ if (desc == null) return null;
+ debug("Pipeline to decode %s %s: %s", media, codec, desc);
+ Gst.Element bin = Gst.parse_bin_from_description(desc, true);
+ bin.name = name;
+ return bin;
+ }
+
+ public string? get_encode_bin_description(string media, string? codec, string? element_name = null, uint pt = 96, string? name = null) {
+ if (codec == null) return null;
+ string base_name = name ?? @"encode-$codec-$(Random.next_int())";
+ string pay = get_pay_element_name(media, codec);
+ string encode = element_name ?? get_encode_element_name(media, codec);
+ if (pay == null || encode == null) return null;
+ string encode_prefix = get_encode_prefix(media, codec, encode) ?? "";
+ string encode_suffix = get_encode_suffix(media, codec, encode) ?? "";
+ if (media == "audio") {
+ return @"audioconvert name=$base_name-convert ! audioresample name=$base_name-resample ! $encode_prefix$encode$encode_suffix ! $pay pt=$pt name=$base_name-rtp-pay";
+ } else {
+ return @"$(media)convert name=$base_name-convert ! $encode_prefix$encode$encode_suffix ! $pay pt=$pt name=$base_name-rtp-pay";
+ }
+ }
+
+ public Gst.Element? get_encode_bin(string media, JingleRtp.PayloadType payload_type, string? name = null) {
+ string? codec = get_codec_from_payload(media, payload_type);
+ string base_name = name ?? @"encode-$codec-$(Random.next_int())";
+ string? desc = get_encode_bin_description(media, codec, null, payload_type.id, base_name);
+ if (desc == null) return null;
+ debug("Pipeline to encode %s %s: %s", media, codec, desc);
+ Gst.Element bin = Gst.parse_bin_from_description(desc, true);
+ bin.name = name;
+ return bin;
+ }
+
+} \ No newline at end of file