Removed DTSC::Stream and DTSC::Ring classes - no longer in use anywhere.
This commit is contained in:
Thulinma
parent
a39350f83e
commit
9631b79e86
6 changed files with 1 additions and 718 deletions
525
lib/dtsc.cpp
525
lib/dtsc.cpp
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@ -10,531 +10,6 @@ char DTSC::Magic_Header[] = "DTSC";
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char DTSC::Magic_Packet[] = "DTPD";
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char DTSC::Magic_Packet2[] = "DTP2";
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/// Initializes a DTSC::Stream with only one packet buffer.
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DTSC::Stream::Stream() {
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datapointertype = DTSC::INVALID;
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buffercount = 1;
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buffertime = 0;
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}
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/// Initializes a DTSC::Stream with a minimum of rbuffers packet buffers.
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/// The actual buffer count may not at all times be the requested amount.
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DTSC::Stream::Stream(unsigned int rbuffers, unsigned int bufferTime) {
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datapointertype = DTSC::INVALID;
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if (rbuffers < 1) {
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rbuffers = 1;
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}
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buffercount = rbuffers;
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buffertime = bufferTime;
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}
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/// This function does nothing, it's supposed to be overridden.
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/// It will be called right before a buffer position is deleted.
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void DTSC::Stream::deletionCallback(livePos deleting) {}
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/// Returns the time in milliseconds of the last received packet.
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/// This is _not_ the time this packet was received, only the stored time.
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unsigned int DTSC::Stream::getTime() {
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if (!buffers.size()) {
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return 0;
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}
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return buffers.rbegin()->second["time"].asInt();
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}
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/// Attempts to parse a packet from the given std::string buffer.
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/// Returns true if successful, removing the parsed part from the buffer string.
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/// Returns false if invalid or not enough data is in the buffer.
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/// \arg buffer The std::string buffer to attempt to parse.
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bool DTSC::Stream::parsePacket(std::string & buffer) {
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uint32_t len;
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static bool syncing = false;
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if (buffer.length() > 8) {
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if (memcmp(buffer.c_str(), DTSC::Magic_Header, 4) == 0) {
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len = ntohl(((uint32_t *)buffer.c_str())[1]);
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if (buffer.length() < len + 8) {
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return false;
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}
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unsigned int i = 0;
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JSON::Value meta;
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JSON::fromDTMI((unsigned char *)buffer.c_str() + 8, len, i, meta);
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metadata = Meta(meta);
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buffer.erase(0, len + 8);
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if (buffer.length() <= 8) {
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return false;
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}
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}
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int version = 0;
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if (memcmp(buffer.c_str(), DTSC::Magic_Packet, 4) == 0) {
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version = 1;
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}
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if (memcmp(buffer.c_str(), DTSC::Magic_Packet2, 4) == 0) {
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version = 2;
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}
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if (version) {
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len = ntohl(((uint32_t *)buffer.c_str())[1]);
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if (buffer.length() < len + 8) {
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return false;
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}
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JSON::Value newPack;
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unsigned int i = 0;
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if (version == 1) {
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JSON::fromDTMI((unsigned char *)buffer.c_str() + 8, len, i, newPack);
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}
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if (version == 2) {
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JSON::fromDTMI2((unsigned char *)buffer.c_str() + 8, len, i, newPack);
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}
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buffer.erase(0, len + 8);
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addPacket(newPack);
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syncing = false;
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return true;
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}
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#if DEBUG >= DLVL_WARN
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if (!syncing) {
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DEBUG_MSG(DLVL_WARN, "Invalid DTMI data detected - re-syncing");
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syncing = true;
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}
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#endif
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size_t magic_search = buffer.find(Magic_Packet);
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size_t magic_search2 = buffer.find(Magic_Packet2);
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if (magic_search2 == std::string::npos) {
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if (magic_search == std::string::npos) {
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buffer.clear();
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} else {
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buffer.erase(0, magic_search);
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}
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} else {
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buffer.erase(0, magic_search2);
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}
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}
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return false;
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}
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/// Attempts to parse a packet from the given Socket::Buffer.
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/// Returns true if successful, removing the parsed part from the buffer.
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/// Returns false if invalid or not enough data is in the buffer.
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/// \arg buffer The Socket::Buffer to attempt to parse.
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bool DTSC::Stream::parsePacket(Socket::Buffer & buffer) {
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uint32_t len;
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static bool syncing = false;
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if (buffer.available(8)) {
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std::string header_bytes = buffer.copy(8);
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if (memcmp(header_bytes.c_str(), DTSC::Magic_Header, 4) == 0) {
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len = ntohl(((uint32_t *)header_bytes.c_str())[1]);
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if (!buffer.available(len + 8)) {
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return false;
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}
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unsigned int i = 0;
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std::string wholepacket = buffer.remove(len + 8);
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JSON::Value meta;
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JSON::fromDTMI((unsigned char *)wholepacket.c_str() + 8, len, i, meta);
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addMeta(meta);
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//recursively calls itself until failure or data packet instead of header
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return parsePacket(buffer);
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}
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int version = 0;
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if (memcmp(header_bytes.c_str(), DTSC::Magic_Packet, 4) == 0) {
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version = 1;
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}
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if (memcmp(header_bytes.c_str(), DTSC::Magic_Packet2, 4) == 0) {
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version = 2;
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}
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if (version) {
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len = ntohl(((uint32_t *)header_bytes.c_str())[1]);
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if (!buffer.available(len + 8)) {
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return false;
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}
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JSON::Value newPack;
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unsigned int i = 0;
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std::string wholepacket = buffer.remove(len + 8);
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if (version == 1) {
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JSON::fromDTMI((unsigned char *)wholepacket.c_str() + 8, len, i, newPack);
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}
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if (version == 2) {
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JSON::fromDTMI2((unsigned char *)wholepacket.c_str() + 8, len, i, newPack);
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}
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addPacket(newPack);
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syncing = false;
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return true;
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}
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#if DEBUG >= DLVL_WARN
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if (!syncing) {
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DEBUG_MSG(DLVL_WARN, "Invalid DTMI data detected - syncing");
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syncing = true;
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}
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#endif
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buffer.get().clear();
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}
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return false;
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}
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/// Adds a keyframe packet to all tracks, so the stream can be fully played.
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void DTSC::Stream::endStream() {
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if (!metadata.tracks.size()) {
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return;
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}
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for (std::map<unsigned int, Track>::iterator it = metadata.tracks.begin(); it != metadata.tracks.end(); it++) {
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JSON::Value newPack;
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newPack["time"] = (long long)it->second.lastms;
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newPack["trackid"] = it->first;
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newPack["keyframe"] = 1ll;
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newPack["data"] = "";
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addPacket(newPack);
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}
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}
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/// Blocks until either the stream has metadata available or the sourceSocket errors.
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/// This function is intended to be run before any commands are sent and thus will not throw away anything important.
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/// It will time out after 3 seconds, disconnecting the sourceSocket.
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void DTSC::Stream::waitForMeta(Socket::Connection & sourceSocket, bool closeOnError){
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bool wasBlocking = sourceSocket.isBlocking();
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sourceSocket.setBlocking(false);
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//cancel the attempt after 5000 milliseconds
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long long int start = Util::getMS();
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while (!metadata && sourceSocket.connected() && Util::getMS() - start < 3000) {
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//we have data? attempt to read header
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if (sourceSocket.Received().size()) {
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//return value is ignored because we're not interested in data packets, just metadata.
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parsePacket(sourceSocket.Received());
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}
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//still no header? check for more data
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if (!metadata) {
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if (sourceSocket.spool()) {
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//more received? attempt to read
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//return value is ignored because we're not interested in data packets, just metadata.
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parsePacket(sourceSocket.Received());
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} else {
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//nothing extra to receive? wait a bit and retry
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Util::sleep(10);
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}
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}
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}
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sourceSocket.setBlocking(wasBlocking);
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//if the timeout has passed, close the socket
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if (Util::getMS() - start >= 3000 && closeOnError){
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sourceSocket.close();
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//and optionally print a debug message that this happened
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DEBUG_MSG(DLVL_DEVEL, "Timing out while waiting for metadata");
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}
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}
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/// Blocks until either the stream encounters a pause mark or the sourceSocket errors.
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/// This function is intended to be run after the 'q' command is sent, throwing away superfluous packets.
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/// It will time out after 5 seconds, disconnecting the sourceSocket.
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void DTSC::Stream::waitForPause(Socket::Connection & sourceSocket) {
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bool wasBlocking = sourceSocket.isBlocking();
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sourceSocket.setBlocking(false);
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//cancel the attempt after 5000 milliseconds
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long long int start = Util::getMS();
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while (lastType() != DTSC::PAUSEMARK && sourceSocket.connected() && Util::getMS() - start < 5000) {
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//we have data? parse it
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if (sourceSocket.Received().size()) {
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//return value is ignored because we're not interested.
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parsePacket(sourceSocket.Received());
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}
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//still no pause mark? check for more data
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if (lastType() != DTSC::PAUSEMARK) {
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if (sourceSocket.spool()) {
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//more received? attempt to read
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//return value is ignored because we're not interested in data packets, just metadata.
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parsePacket(sourceSocket.Received());
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} else {
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//nothing extra to receive? wait a bit and retry
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Util::sleep(10);
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}
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}
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}
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sourceSocket.setBlocking(wasBlocking);
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//if the timeout has passed, close the socket
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if (Util::getMS() - start >= 5000) {
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sourceSocket.close();
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//and optionally print a debug message that this happened
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DEBUG_MSG(DLVL_DEVEL, "Timing out while waiting for pause break");
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}
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}
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/// Resets the stream by clearing the buffers and keyframes, making sure to call the deletionCallback first.
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void DTSC::Stream::resetStream() {
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for (std::map<livePos, JSON::Value >::iterator it = buffers.begin(); it != buffers.end(); it++) {
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deletionCallback(it->first);
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}
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buffers.clear();
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keyframes.clear();
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}
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/// Adds a set of metadata to the steam.
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/// This is implemented by simply replacing the current metadata.
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/// This effectively resets the stream.
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void DTSC::Stream::addMeta(JSON::Value & newMeta) {
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metadata = Meta(newMeta);
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}
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/// Adds a single DTSC packet to the stream, updating the internal metadata if needed.
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void DTSC::Stream::addPacket(JSON::Value & newPack) {
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livePos newPos;
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newPos.trackID = newPack["trackid"].asInt();
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newPos.seekTime = newPack["time"].asInt();
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if (!metadata.tracks.count(newPos.trackID) && (!newPack.isMember("mark") || newPack["mark"].asStringRef() != "pause")) {
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return;
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}
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if (buffercount > 1 && metadata.tracks[newPos.trackID].keys.size() > 1 && newPos.seekTime < (long long unsigned int)metadata.tracks[newPos.trackID].keys.rbegin()->getTime()) {
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resetStream();
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}
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while (buffers.count(newPos) > 0) {
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newPos.seekTime++;
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}
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while (buffercount == 1 && buffers.size() > 0) {
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cutOneBuffer();
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}
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buffers[newPos] = newPack;
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datapointertype = INVALID;
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std::string tmp = "";
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if (newPack.isMember("trackid") && newPack["trackid"].asInt() > 0) {
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tmp = metadata.tracks[newPack["trackid"].asInt()].type;
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}
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if (newPack.isMember("datatype")) {
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tmp = newPack["datatype"].asStringRef();
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}
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if (tmp == "video") {
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datapointertype = VIDEO;
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}
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if (tmp == "audio") {
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datapointertype = AUDIO;
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}
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if (tmp == "meta") {
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datapointertype = META;
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}
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if (tmp == "pause_marker" || (newPack.isMember("mark") && newPack["mark"].asStringRef() == "pause")) {
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datapointertype = PAUSEMARK;
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}
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if (buffercount > 1) {
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metadata.update(newPack);
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if (newPack.isMember("keyframe") || (long long unsigned int)metadata.tracks[newPos.trackID].keys.rbegin()->getTime() == newPos.seekTime) {
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keyframes[newPos.trackID].insert(newPos);
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}
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metadata.live = true;
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//throw away buffers if buffer time is met
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int trid = buffers.begin()->first.trackID;
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int firstTime = buffers.begin()->first.seekTime;
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int lastTime = buffers.rbegin()->first.seekTime - buffertime;
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while ((!metadata.tracks[trid].keys.size() && firstTime < lastTime) || (metadata.tracks[trid].keys.size() && metadata.tracks[trid].keys.rbegin()->getTime() < lastTime) || (metadata.tracks[trid].keys.size() > 2 && metadata.tracks[trid].keys.rbegin()->getTime() - firstTime > buffertime)) {
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cutOneBuffer();
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trid = buffers.begin()->first.trackID;
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firstTime = buffers.begin()->first.seekTime;
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}
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metadata.bufferWindow = buffertime;
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}
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}
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/// Deletes a the first part of the buffer, updating the keyframes list and metadata as required.
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/// Will print a warning if a track has less than 2 keyframes left because of this.
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void DTSC::Stream::cutOneBuffer() {
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if (!buffers.size()) {
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return;
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}
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int trid = buffers.begin()->first.trackID;
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long long unsigned int delTime = buffers.begin()->first.seekTime;
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if (buffercount > 1) {
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while (keyframes[trid].size() > 0 && keyframes[trid].begin()->seekTime <= delTime) {
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keyframes[trid].erase(keyframes[trid].begin());
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}
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while (metadata.tracks[trid].keys.size() && (long long unsigned int)metadata.tracks[trid].keys[0].getTime() <= delTime) {
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for (int i = 0; i < metadata.tracks[trid].keys[0].getParts(); i++) {
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metadata.tracks[trid].parts.pop_front();
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}
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metadata.tracks[trid].keys.pop_front();
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}
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if (metadata.tracks[trid].keys.size()) {
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metadata.tracks[trid].firstms = metadata.tracks[trid].keys[0].getTime();
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//delete fragments of which the beginning can no longer be reached
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while (metadata.tracks[trid].fragments.size() && metadata.tracks[trid].fragments[0].getNumber() < metadata.tracks[trid].keys[0].getNumber()) {
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metadata.tracks[trid].fragments.pop_front();
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//increase the missed fragments counter
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metadata.tracks[trid].missedFrags++;
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}
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} else {
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metadata.tracks[trid].fragments.clear();
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}
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}
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deletionCallback(buffers.begin()->first);
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buffers.erase(buffers.begin());
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}
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/// Returns a direct pointer to the data attribute of the last received packet, if available.
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/// Returns NULL if no valid pointer or packet is available.
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std::string & DTSC::Stream::lastData() {
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return buffers.rbegin()->second["data"].strVal;
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}
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/// Returns the packet in this buffer number.
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/// \arg num Buffer number.
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JSON::Value & DTSC::Stream::getPacket(livePos num) {
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static JSON::Value empty;
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if (buffers.find(num) == buffers.end()) {
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return empty;
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}
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return buffers[num];
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}
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JSON::Value & DTSC::Stream::getPacket() {
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return buffers.begin()->second;
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}
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/// Returns the type of the last received packet.
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DTSC::datatype DTSC::Stream::lastType() {
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return datapointertype;
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}
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/// Returns true if the current stream contains at least one video track.
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bool DTSC::Stream::hasVideo() {
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for (std::map<unsigned int, Track>::iterator it = metadata.tracks.begin(); it != metadata.tracks.end(); it++) {
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if (it->second.type == "video") {
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return true;
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}
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}
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return false;
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}
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/// Returns true if the current stream contains at least one audio track.
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bool DTSC::Stream::hasAudio() {
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for (std::map<unsigned int, Track>::iterator it = metadata.tracks.begin(); it != metadata.tracks.end(); it++) {
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if (it->second.type == "audio") {
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return true;
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}
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}
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return false;
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}
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void DTSC::Stream::setBufferTime(unsigned int ms) {
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buffertime = ms;
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}
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std::string & DTSC::Stream::outPacket() {
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static std::string emptystring;
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if (!buffers.size() || !buffers.rbegin()->second.isObject()) {
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return emptystring;
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}
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return buffers.rbegin()->second.toNetPacked();
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}
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/// Returns a packed DTSC packet, ready to sent over the network.
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std::string & DTSC::Stream::outPacket(livePos num) {
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static std::string emptystring;
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if (buffers.find(num) == buffers.end() || !buffers[num].isObject()) return emptystring;
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return buffers[num].toNetPacked();
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}
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/// Returns a packed DTSC header, ready to sent over the network.
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std::string & DTSC::Stream::outHeader() {
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return metadata.toJSON().toNetPacked();
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}
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/// Constructs a new Ring, at the given buffer position.
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/// \arg v Position for buffer.
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DTSC::Ring::Ring(livePos v) {
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b = v;
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waiting = false;
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starved = false;
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updated = false;
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playCount = 0;
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}
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/// Requests a new Ring, which will be created and added to the internal Ring list.
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/// This Ring will be kept updated so it always points to valid data or has the starved boolean set.
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/// Don't forget to call dropRing() for all requested Ring classes that are no longer neccessary!
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DTSC::Ring * DTSC::Stream::getRing() {
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livePos tmp = buffers.begin()->first;
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std::map<int, std::set<livePos> >::iterator it;
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for (it = keyframes.begin(); it != keyframes.end(); it++) {
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if ((*it->second.begin()).seekTime > tmp.seekTime) {
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tmp = *it->second.begin();
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}
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}
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return new DTSC::Ring(tmp);
|
||||
}
|
||||
|
||||
/// Deletes a given out Ring class from memory and internal Ring list.
|
||||
/// Checks for NULL pointers and invalid pointers, silently discarding them.
|
||||
void DTSC::Stream::dropRing(DTSC::Ring * ptr) {
|
||||
if (ptr) {
|
||||
delete ptr;
|
||||
}
|
||||
}
|
||||
|
||||
/// Returns 0 if seeking is possible, -1 if the wanted frame is too old, 1 if the wanted frame is too new.
|
||||
/// This function looks in the header - not in the buffered data itself.
|
||||
int DTSC::Stream::canSeekms(unsigned int ms) {
|
||||
bool too_late = false;
|
||||
//no tracks? Frame too new by definition.
|
||||
if (!metadata.tracks.size()) {
|
||||
return 1;
|
||||
}
|
||||
//loop trough all the tracks
|
||||
for (std::map<unsigned int, Track>::iterator it = metadata.tracks.begin(); it != metadata.tracks.end(); it++) {
|
||||
if (it->second.keys.size()) {
|
||||
if (it->second.keys[0].getTime() <= ms && it->second.keys[it->second.keys.size() - 1].getTime() >= ms) {
|
||||
return 0;
|
||||
}
|
||||
if (it->second.keys[0].getTime() > ms) {
|
||||
too_late = true;
|
||||
}
|
||||
}
|
||||
}
|
||||
//did we spot a track already past this point? return too late.
|
||||
if (too_late) {
|
||||
return -1;
|
||||
}
|
||||
//otherwise, assume not available yet
|
||||
return 1;
|
||||
}
|
||||
|
||||
DTSC::livePos DTSC::Stream::msSeek(unsigned int ms, std::set<unsigned int> & allowedTracks) {
|
||||
std::set<unsigned int> seekTracks = allowedTracks;
|
||||
livePos result = buffers.begin()->first;
|
||||
for (std::set<unsigned int>::iterator it = allowedTracks.begin(); it != allowedTracks.end(); it++) {
|
||||
if (metadata.tracks[*it].type == "video") {
|
||||
int trackNo = *it;
|
||||
seekTracks.clear();
|
||||
seekTracks.insert(trackNo);
|
||||
break;
|
||||
}
|
||||
}
|
||||
for (std::map<livePos, JSON::Value>::iterator bIt = buffers.begin(); bIt != buffers.end(); bIt++) {
|
||||
if (seekTracks.find(bIt->first.trackID) != seekTracks.end()) {
|
||||
// if (bIt->second.isMember("keyframe")){
|
||||
result = bIt->first;
|
||||
if (bIt->first.seekTime >= ms) {
|
||||
return result;
|
||||
}
|
||||
//}
|
||||
}
|
||||
}
|
||||
return result;
|
||||
}
|
||||
|
||||
/// Returns whether the current position is the last currently available position within allowedTracks.
|
||||
/// Simply returns the result of getNext(pos, allowedTracks) == pos
|
||||
bool DTSC::Stream::isNewest(DTSC::livePos & pos, std::set<unsigned int> & allowedTracks) {
|
||||
return getNext(pos, allowedTracks) == pos;
|
||||
}
|
||||
|
||||
/// Returns the next available position within allowedTracks, or the current position if no next is availble.
|
||||
DTSC::livePos DTSC::Stream::getNext(DTSC::livePos & pos, std::set<unsigned int> & allowedTracks) {
|
||||
std::map<livePos, JSON::Value>::iterator iter = buffers.upper_bound(pos);
|
||||
while (iter != buffers.end()) {
|
||||
if (allowedTracks.count(iter->first.trackID)) {
|
||||
return iter->first;
|
||||
}
|
||||
iter++;
|
||||
}
|
||||
return pos;
|
||||
}
|
||||
|
||||
/// Properly cleans up the object for erasing.
|
||||
/// Drops all Ring classes that have been given out.
|
||||
DTSC::Stream::~Stream() {
|
||||
}
|
||||
|
||||
DTSC::File::File() {
|
||||
F = 0;
|
||||
buffer = malloc(4);
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue