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Htsp » History » Version 133

Jaroslav Kysela, 2015-05-29 22:24

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h1. Home Tv Streaming Protocol (HTSP) - Version 21
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h2. General
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HTSP is a TCP based protocol primarily intended for streaming of live TV and related meta data such as channels, group of channels (called tags in HTSP) and electronic program guide (EPG) information.
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The transmission and reception of a channel over HTSP is referred to as a subscription. A single HTSP session can handle as many concurrent subscriptions as the bandwidth and CPU permits.
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The HTSP server in tvheadend has a payload-aware scheduler for prioritizing more important packets (such as I-frames) before less important ones (such as B-frames). This makes HTSP suitable for long-distance transmissions and/or paths with non-perfect delivery.
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(It has been tested with a server in Stockholm and the client in Berlin).
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For information about the HTSP wire format please read [[htsmsgbinary|HTSMSG binary format]]
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If you're looking to develop a new client, there are several existing client implementations from which you might be able to gain knowledge:
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* "XBMC":https://github.com/opdenkamp/xbmc/tree/master/xbmc/pvrclients/tvheadend
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* "Showtime":https://github.com/andoma/showtime/tree/master/src/backend/htsp
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* "TVHGuide":https://github.com/john-tornblom/TVHGuide
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* "PyHTSP":https://github.com/adamsutton/tvheadend/tree/master/lib/py/tvh/htsp.py (This is a demo client and is WIP, it has limited functionality).
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----
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h2. Protocol Changes
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h3. v18..v19
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h3. v19..v20
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* dvrEntry structures
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** added subscriptionError, streamErrors, dataErrors fields
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** added subtitle fields
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* autorecEntry structures
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** added dupDetect and fulltext fields
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* errors fields to the stream deliver?
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* satpos to the subscription start ?
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* added subscriptionError field to subscriptionStatus server-to-client method
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h3. v18..v19
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* autorec/timerec structures
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** added directory field (forced output directory)
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** added enabled field
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h3. v17..v18
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* added addTimerecEntry, deleteTimerecEntry methods
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* added timerecEntryAdd, timerecEntryUpdate, timerecEntryDelete server-to-client methods
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* extended addAutorecEntry method
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** added start/startWindow/name fields
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** added owner/creator fields
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** obsoleted creator field
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* extended dvrEntryAdd, dvrEntryUpdate
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** added timerecId field
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** added owner/creator fields
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* extended addAutorecEntry, deleteAutorecEntry methods
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** added start/startWindow fields
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** obsoleted approxTime
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** added name/owner/creator fields
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* extended autorecEntryAdd, autorecEntryUpdate server-to-client methods
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** fields like for addAutorecEntry
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* extended getTag method
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** added tagIndex field
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h3. v16..v17
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* extended subscriptionStart server-to-client method
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** added meta field
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* changed H264 meta data handling (codec meta data are in the meta field only in start message)
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* VORBIS and AAC codecs have codec specific meta data in the meta field in start message
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* changed subscribe method
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** the normts is always active and the parameter is ignored
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h3. v15..v16
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* added getProfiles, getDvrConfigs methods
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* removed getCodecs methods
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* extended subscribe method
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** add profile field
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h3. v14..v15
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* extended channelAdd, channelUpdate server-to-client methods
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** the channelIcon URL can be relative 'imagecache/%d' or '/imagecache/%d'
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* extended getChannel method
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** the channelIcon URL can be relative 'imagecache/%d' or '/imagecache/%d'
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h3. v13..v14
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* added getChannel method
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h3. v12..v13
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* added addAutorecEntry method
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* added deleteAutorecEntry method
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* added autorecEntryAdd, autorecEntryUpdate, autorecEntryDelete server-to-client methods
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* extended channelAdd server-to-client method
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** added channelNumberMinor (for {major}.{minor} channel numbers)
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* extended dvrEntryAdd and dvrEntryUpdate server-to-client methods
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** added eventId, autorecId, startExtra, stopExtra, retention, priority, contentType fields
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* extended addDvrEntry method
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** added retention
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* extended updateDvrEntry method
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** added retention, priority
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* extended epgQuery method
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** added minduration, maxduration
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* added subscriptionGrace server-to-client method
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h3. v11..v12
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* added subscriptionFilterStream method
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* added getDvrCutpoints method
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h3. v10..v11
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* added audio_type in the subscriptionStart server-to-client method
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* added getCodecs method
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h2. Communication
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This communication is currently implemented by using htsmsg's. All strings are encoded as UTF-8.
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There are two distinct ways for communication within HTSP.
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Apart from this there is a number of messages that needs to be exchanged during login, see the login section below.
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h3. RPC communication
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There is a normal RPC way of doing things. I.e. the client sends a request and the server responds with a reply. All the RPC methods are listed below as the 'Client to Server' methods. Apart from all message fields listed within each message type the client can add an additional field:
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RPC request extra fields:
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<pre>
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seq              int  optional   Sequence number. This field will be echoed back by the server in the reply.
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username         str  optional   Username, in combination with 'digest' this can be used to raise the privileges
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                                 for the session in combination with invocation of a method. 
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digest           bin  optional   Used to raise privileges.
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</pre>
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The followings field should be used by the client to match the reply with the request.
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All replies are guaranteed to arrive in the same order as the requests.
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Even so, probably the best way to implement the request-reply client is by taking advantage of the 'seq' field.
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RPC reply extra fields:
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<pre>
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seq              int  optional   Sequence number. Same as in the request.
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error            str  optional   If present an error has occurred and the text describes the error.
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noaccess         int  optional   If present and set to '1' the user is prohibited from invoking the method due to 
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                                 access restrictions. 
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</pre>
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h3. Streaming communication
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For streaming of live TV and various related messages the server will continuously push data to the client.
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These messages are referred to as asynchronous messages and always have the 'method' field set and never have the 'seq' field set.
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Also, the client can enable an additional asyncMetadata mode and by doing so it will be notified by the server when meta data changes. (EPG updates, creation of channels and tags, etc). 
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h3. Authentication
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In Tvheadend, each method has an associated access restriction. Currently there is only one restriction (Streaming). However, this may change in the future.
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Privileges for these restrictions may be granted in two ways: Username + Password and/or Source IP address.
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Therefore it is possible to gain permissions to the system without entering a username and password.
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While this is really useful it also complicates the authentication schema a bit.
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Upon connect the initial privileges will be raised based on the source address.
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Before any username / password based authentication has taken place the client must have
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obtained a challenge (which stays fixed for the session). This is done via the 'hello' method.
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In principle it's possible to use two different authentication idioms with HTSP.
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Depending on how your application works one or another may be more suitable.
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While they do not really differ from a protocol point of view it's worth mentioning a bit about them here:
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h3. Initial login authentication
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The client performs all of its authentication using the 'login' method.
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It may choose to send:
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* Username and password: Privileges will be raised based on these credentials.
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* Username only: Privileges will be based on just the source address. The username will be used for various logging purposes.
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* Nothing: Privileges will be based on just the source address.
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If no privileges are granted after the login message has been received by the server (i.e. both network and username + password based)
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the server will reply with 'noaccess' set to 1. A client that only employs initial login should honor this flag and ask the
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user for a username + password and retry by using the 'authenticate' method. I.e. it should not send the 'login' method again.
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h3. On-demand authentication
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The client performs all of its authentication when it needs to.
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When using this method, the client will check every RPC reply for the 'noaccess' field.
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If it set to 1 it whould ask the user for username + password and retry the request but also
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add 'username' and 'digest' to the original message. (See _RPC request extra fields_ above)
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Typically it would not send a username or digest during login.
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----
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h2. Client to Server (RPC) methods
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h3. hello
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Used to identify the client toward the server and to get the session challenge used to
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hash passwords into digests. The client can request a different version of the HTSP
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protocol with this method. If no 'hello' message is sent the server assumes latest version
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is to be used.
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Client/Server should select lowest common version, if this is not possible connection should be terminated.
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Request message fields:
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<pre>
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htspversion        u32   required   Client preferred HTSP version.
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clientname         str   required   Client software name.
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clientversion      str   required   Client software version.
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</pre>
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Reply message fields:
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<pre>
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htspversion        u32   required   The server supports all versions of the protocol up to and including this number.
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servername         str   required   Server software name.
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serverversion      str   required   Server software version.
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servercapability   str[] required   Server capabilities (Added in version 6)
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challenge          bin   required   32 bytes randomized data used to generate authentication digests
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webroot            str   optional   Server HTTP webroot (Added in version 8)
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                                    Note: any access to TVH webserver should include this at start of URL path
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</pre>
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Note: possible values for servercapability[]:
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<pre>
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cwc                Descrambling available
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v4l                Analogue TV available
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linuxdvb           Linux DVB API available
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imagecache         Image caching available
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timeshift          Timeshifting available (Added in version 9).
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</pre>
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h3. authenticate
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This can be used to issue authentication without doing anything else.
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If no privileges are gained it will return with 'noaccess' set to 1.
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Request message fields:
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<pre>
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None   
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</pre>
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Reply message fields:
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<pre>
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noaccess           u32   optional   If set to 1, no privileges were granted.
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</pre>
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----
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h3. getDiskSpace (Added in version 3)
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Return diskspace status from Tvheadend's PVR storage
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Request message fields:
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<pre>
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None
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</pre>
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Reply message fields:
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<pre>
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freediskspace      s64   required   Bytes available.
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totaldiskspace     s64   required   Total capacity.
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</pre>
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h3. getSysTime (Added in version 3)
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Return system time on the server.
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Request message fields:
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<pre>
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None
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</pre>
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Reply message fields:
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<pre>
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time               s64  required   UNIX time.
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timezone           s32  required   Minutes west of GMT.
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</pre>
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----
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h3. enableAsyncMetadata
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When this is enabled the client will get continuous updates from the server about added, update or deleted channels, tags, dvr and epg entries.
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An interactive application that presents the user with information about these things should probably enable this and the implement the various server to client methods.
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Request message fields:
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<pre>
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epg                u32   optional   Set to 1, to include EPG data in async, implied by epgMaxTime (Added in version 6).
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lastUpdate         s64   optional   Only provide metadata that has changed since this time (Added in version 6).
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epgMaxTime         s64   optional   Maximum time to return EPG data up to (Added in version 6)
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language           str   optional   RFC 2616 compatible language list (Added in version 6)
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</pre>
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Reply message fields:
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<pre>
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None
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</pre>
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Once the reply as been sent the initial data set will be provided, and then updates will arrive asynchronously after that. The initial data dump is sent using the following messages:
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<pre>
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tagAdd                   optional
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channelAdd               optional
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tagUpdate                optional
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dvrEntryAdd              optional
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eventAdd                 optional   (Added in version 6)
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initialSyncComplete      required
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</pre>
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----
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h3. getChannel (Added in version 14)
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Request information about the given channel.
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Request message fields:
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<pre>
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channelId          u32   required   Channel ID.
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</pre>
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Reply message fields:
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<pre>
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see channelAdd
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</pre>
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----
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h3. getEvent
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Request information about the given event. An event typically corresponds to a program on a channel.
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The language field in the request allows preference for languages to be requested for the various string fields.
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Request message fields:
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<pre>
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eventId            u32   required   Event ID.
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language           str   optional   RFC 2616 compatible language list (Added in version 6)
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</pre>
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Reply message fields:
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<pre>
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see eventAdd
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</pre>
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h3. getEvents (Added in version 4)
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Request information about a set of events. If no options are specified the entire EPG database will be returned.
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Request message fields:
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<pre>
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eventId            u32   optional   Event ID to begin from (Optional since version 6)
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channelId          u32   optional   Channel ID to get data for (Added in version 6)
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numFollowing       u32   optional   Number of events to add (Optional since version 6)
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maxTime            u64   optional   Maximum time to return data up to (Added in version 6)
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language           str   optional   RFC 2616 compatible language list (Added in version 6)
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</pre>
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Reply message fields:
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<pre>
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events             msg[] required   List of events, using response message fields from eventAdd
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</pre>
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h3. epgQuery (Added in version 4)
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Query the EPG (event titles) and optionally restrict to channel/tag/content type.
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Request message fields:
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<pre>
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query              str   required  Title regular expression to search for
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channelId          u32   optional  [[ChannelId]] to restrict search to
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tagId              u32   optional  [[TagId]] to restrict search to
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contentType        u32   optional  DVB content type to restrict search to
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minduration        u32   optional  Minimal duration in seconds (Added in version 13)
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maxduration        u32   optional  Maximal duration in seconds (Added in version 13)
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language           str   optional  RFC 2616 compatible language list for title (Added in version 6)
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full               u32   optional  Output full event list rather than just IDs
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</pre>
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Reply message fields:
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if full == 1
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<pre>
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events             msg[] optional   List of events, using response message fields from eventAdd
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</pre>
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else
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<pre>
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eventIds           u32[] optional  List of eventIds that match the query
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</pre>
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h3. getEpgObject
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Get detailed EPG Object info.
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Request message fields:
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<pre>
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id                 u32   required  Object ID
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type               u32   optional  Object type
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</pre>
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Reply message fields:
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<pre>
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TODO
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</pre>
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----
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h3. getDvrConfigs (Added in version 16)
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Return a list of DVR configurations.
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Reply message fields:
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<pre>
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dvrconfigs         msg[]      optional   Supported DVR configurations.
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</pre>
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Message fields:
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<pre>
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uuid               str        required   DVR configuration ID
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name               str        required   DVR configuration Name
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comment            str        required   DVR configuration Comment
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</pre>
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h3. addDvrEntry (Added in version 4)
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Create a new DVR entry. Either eventId or channelId, start and stop must be specified.
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Request message fields:
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<pre>
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eventId            u32   optional   Event ID (Optional since version 5).
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channelId          u32   optional   Channel ID (Added in version 5)
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start              s64   optional   Time to start recording (Added in version 5)
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stop               s64   optional   Time to stop recording (Added in version 5)
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retention          u32   optional   Retention time in days (Added in version 13)
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creator            str   optional   Name of the event creator (Added in version 5, obsoleted in version 18 - applications are not allowed to change credential)
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priority           u32   optional   Recording priority (Added in version 5)
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startExtra         s64   optional   Pre-recording buffer in minutes (Added in version 5)
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stopExtra          s64   optional   Post-recording buffer in minutes (Added in version 5)
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title              str   optional   Recording title, if no eventId (Added in version 6)
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subtitle           str   optional   Recording subtitle, if no eventId (Added in version 20)
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description        str   optional   Recording description, if no eventId (Added in version 5)
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configName         str   optional   DVR configuration name or UUID
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</pre>
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Reply message fields:
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<pre>
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success            u32   required   1 if entry was added, 0 otherwise
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id                 u32   optional   ID of created DVR entry
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error              str   optional   English clear text of error message
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</pre>
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h3. updateDvrEntry (Added in version 5)
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Update an existing DVR entry.
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Request message fields:
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<pre>
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id                 u32   required   DVR Entry ID
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start              s64   optional   New start time
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stop               s64   optional   New stop time
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title              str   optional   New entry title
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description        str   optional   New entry description (Added in version 6)
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startExtra         s64   optional   New pre-record buffer (Added in version 6)
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stopExtra          s64   optional   New post-record buffer (Added in version 6)
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configName         str   optional   New DVR configuration name or UUID
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retention          u32   optional   Retention in days (Added in version 13)
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priority           u32   optional   Recording priority (Added in version 13)
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</pre>
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Reply message fields:
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<pre>
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success            u32   required   1 if update as successful, otherwise 0
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error              str   optional   Error message if update failed
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</pre>
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h3. cancelDvrEntry (Added in version 5)
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Cancel an existing recording, but don't remove the entry from the database.
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Request message fields:
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<pre>
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id                 u32   required   dvrEnryId to delete
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</pre>
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Reply message fields:
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<pre>
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success            int   required   1 if entry was cancelled
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error              str   optional   Error message if cancellation failed
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</pre>
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h3. deleteDvrEntry (Added in version 4)
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Delete an existing DVR entry from the database.
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Request message fields:
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<pre>
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id                 u32   required   DVR Entry ID
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</pre>
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Reply message fields:
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<pre>
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success            u32   required   1 if entry was removed
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error              str   optional   Error message if the delete fails
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</pre>
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h3. getDvrCutpoints (Added in version 12)
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Get DVR cutpoints.
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Request message fields:
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<pre>
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id                 u32   required   DVR Entry ID
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</pre>
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Reply message fields:
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<pre>
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cutpoints          msg[] optional   List of cutpoint entries, if a file is found and has some valid data.
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</pre>
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Cutpoint fields:
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<pre>
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start              u32   required   Cut start time in ms.
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end                u32   required   Cut end time in ms.
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type               u32   required   Action type: 
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                                      0=Cut, 1=Mute, 2=Scene, 
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                                      3=Commercial break.
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</pre>
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---
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h3. addAutorecEntry (Added in version 13)
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Create a new Autorec DVR entry. Title must be specified.
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Request message fields:
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<pre>
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enabled            u32   optional   Enabled flag (Added in version 19).
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title              str   required   Title for the recordings.
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fulltext           u32   optional   Full text flag (Added in version 20).
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directory          str   optional   Forced directory name - missing or empty = auto (Added in version 19).
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name               str   optional   Name of this autorec entry (Added in version 18).
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configName         str   optional   DVR Configuration Name / UUID.
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channelId          u32   optional   Channel ID.
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minDuration        u32   optional   Minimal duration in seconds (0 = Any).
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maxDuration        u32   optional   Maximal duration in seconds (0 = Any).
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daysOfWeek         u32   optional   Bitmask - Days of week (0x01 = Monday, 0x40 = Sunday, 0x7f = Whole Week, 0 = Not set).
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priority           u32   optional   Priority (0 = Important, 1 = High, 2 = Normal, 3 = Low, 4 = Unimportant, 5 = Not set).
568 117 Jaroslav Kysela
approxTime         u32   optional   Minutes from midnight (up to 24*60) (window +- 15 mintes) (Obsoleted from version 18).
569
start              s32   optional   Minutes from midnight (up to 24*60) for the start of the time window (including) (Added in version 18).
570
startWindow        s32   optional   Minutes from modnight (up to 24*60) for the end of the time window (including, cross-noon allowed) (Added in version 18).
571 91 Jaroslav Kysela
startExtra         s64   optional   Extra start minutes (pre-time).
572
stopExtra          s64   optional   Extra stop minutes (post-time).
573
comment            str   optional   User Comment.
574
</pre>
575 83 Jaroslav Kysela
576
Reply message fields:
577
<pre>
578
success            u32   required   1 if entry was added, 0 otherwise
579
id                 str   optional   ID (string!) of created autorec DVR entry
580
error              str   optional   English clear text of error message
581
</pre>
582
583
h3. deleteAutorecEntry (Added in version 13)
584
585
Delete an existing autorec DVR entry from the database.
586
587
Request message fields:
588
<pre>
589
id                 str   required   Autorec DVR Entry ID (string!)
590
</pre>
591
592
Reply message fields:
593
<pre>
594
success            u32   required   1 if entry was removed
595
error              str   optional   Error message if the delete fails
596 1 Andreas Smas
</pre>
597 83 Jaroslav Kysela
598 117 Jaroslav Kysela
---
599 1 Andreas Smas
600 117 Jaroslav Kysela
h3. addTimerecEntry (Added in version 18)
601
602
Create a new Timerec DVR entry. Title must be specified.
603
604
Request message fields:
605
<pre>
606 129 Jaroslav Kysela
enabled            u32   optional   Enabled flag (Added in version 19).
607 117 Jaroslav Kysela
title              str   required   Title for the recordings.
608 125 Jaroslav Kysela
directory          str   optional   Forced output directory name (Added in version 19).
609 117 Jaroslav Kysela
name               str   optional   Name for this timerec entry.
610
configName         str   optional   DVR Configuration Name / UUID.
611
channelId          u32   required   Channel ID.
612
daysOfWeek         u32   optional   Bitmask - Days of week (0x01 = Monday, 0x40 = Sunday, 0x7f = Whole Week, 0 = Not set).
613
priority           u32   optional   Priority (0 = Important, 1 = High, 2 = Normal, 3 = Low, 4 = Unimportant, 5 = Not set).
614
start              u32   required   Minutes from midnight (up to 24*60) for the start of the time window (including)
615
stop               u32   required   Minutes from modnight (up to 24*60) for the end of the time window (including, cross-noon allowed)
616
retention          u32   optional   Retention in days. 
617
comment            str   optional   User Comment.
618
</pre>
619
620
Reply message fields:
621
<pre>
622
success            u32   required   1 if entry was added, 0 otherwise
623
id                 str   optional   ID (string!) of created timerec DVR entry
624
error              str   optional   English clear text of error message
625
</pre>
626
627
h3. deleteTimerecEntry (Added in version 18)
628
629
Delete an existing timerec DVR entry from the database.
630
631
Request message fields:
632
<pre>
633
id                 str   required   Timerec DVR Entry ID (string!)
634
</pre>
635
636
Reply message fields:
637
<pre>
638
success            u32   required   1 if entry was removed
639
error              str   optional   Error message if the delete fails
640
</pre>
641
642
----
643
644 66 Adam Sutton
h3. getTicket (Added in version 5)
645 1 Andreas Smas
646 66 Adam Sutton
Get a ticket to allow access to a channel or recording via HTTP
647 1 Andreas Smas
648 66 Adam Sutton
Request message fields:
649 1 Andreas Smas
<pre>
650 66 Adam Sutton
channelId          u32  optional   Channel to gain access for
651
dvrId              u32  optional   DVR file to gain access for
652 1 Andreas Smas
</pre>
653
654
Reply message fields:
655
<pre>
656 66 Adam Sutton
path               str  required   The full path for access URL (no scheme, host or port)
657
ticket             str  required   The ticket to pass in the URL query string
658 1 Andreas Smas
</pre>
659
660 66 Adam Sutton
h3. subscribe
661 1 Andreas Smas
662 66 Adam Sutton
Request subscription to the given channel. 
663 1 Andreas Smas
664 66 Adam Sutton
Request message fields:
665
<pre>
666
channelId          u32   required   ID for channel. 
667
subscriptionId     u32   required   Subscription ID. Selected by client. This value is not interpreted by the server in any form. 
668
                                    The value is used from now on in all messages related to the subscription.
669 1 Andreas Smas
weight             u32   optional   Weighting of this subscription (same as recording priority).
670 73 Adam Sutton
90khz              u32   optional   Request PTS/DTS in default 90kHz timebase, default is 1MHz (Added in version 7)
671
normts             u32   optional   Request PTS/DTS normalisation (Added in version 7)
672
                                    Note: this will mean missing timestamps are added, first packet should be ~0 and will always be an i-frame.
673
                                    Note: this is implied if timeshiftPeriod is enabled
674 114 Jaroslav Kysela
                                    Note: from version 17, this is always enabled and this parameter is ignored.
675 73 Adam Sutton
queueDepth         u32   optional   Change the default packet queue lengths, default 500000 bytes (Added in version 7)
676
                                    Note: I-frame depth is 3*queueDepth, P-frame is 2*queueDepth and B-frame is queueDepth
677
timeshiftPeriod    u32   optional   The number of seconds to keep in the timeshift buffer (Added in version 9)
678
                                    Note: this may be bounded by server configuration settings
679 108 Jaroslav Kysela
profile            str   optional   Select stream profile (Added in version 16).
680 11 Andreas Smas
</pre>
681 66 Adam Sutton
682 1 Andreas Smas
Reply message fields:
683
<pre>
684 73 Adam Sutton
90khz              u32   optional   Indicates 90khz timestamps will be used
685
normts             u32   optional   Indicates timestamps will be normalised (and fixed)
686
timeshiftPeriod    u32   optional   The actual timeshiftPeriod to be used
687 66 Adam Sutton
</pre>
688 1 Andreas Smas
689 66 Adam Sutton
h3. unsubscribe
690
691
Stop a subscription.
692
693
Request message fields:
694 1 Andreas Smas
<pre>
695 66 Adam Sutton
subscriptionId     u32   required   Subscription ID.
696 58 sbi -
</pre>
697
698 11 Andreas Smas
Reply message fields:
699 1 Andreas Smas
<pre>
700 66 Adam Sutton
None
701 58 sbi -
</pre>
702 11 Andreas Smas
703 66 Adam Sutton
h3. subscriptionChangeWeight (Added in version 5)
704 1 Andreas Smas
705 66 Adam Sutton
Change the weight of an existing subscription
706 1 Andreas Smas
707 66 Adam Sutton
Request message fields:
708
<pre>
709
subscriptionId     u32   required   Subscription ID.
710
weight             u32   optional   The new subscription weight.
711 1 Andreas Smas
</pre>
712
713
Reply message fields:
714
<pre>
715 69 Adam Sutton
None
716 1 Andreas Smas
</pre>
717
718 73 Adam Sutton
h3. subscriptionSkip (Added in version 9)
719
720
Skip a timeshift enabled subscription. The response will be asynchronous subscriptionSkip().
721
722
Request message fields:
723
<pre>
724
subscriptionId     u32   required   Subscription ID.
725
absolute           u32   optional   The skip request is absolute
726
time               u64   optional   Specify skip using time (units are as for PTS)
727
size               u64   optional   Specify skip using size (Not currently used)
728
</pre>
729
730
Reply message fields:
731
<pre>
732
None
733
</pre>
734
735
h3. subscriptionSeek (Added in version 9)
736
737
Synonym for subscriptionSkip
738
739
h3. subscriptionSpeed (Added in version 9)
740
741
Set the playback speed for the subscription. The response will be asynchronous subscriptionSpeed().
742
743
Request message fields:
744
<pre>
745
subscriptionId     u32   required   Subscription ID.
746
speed              u32   required   Specify speed (0=pause, 100=1x fwd, -100=1x backward)
747
</pre>
748
749
Reply message fields:
750
<pre>
751
None
752
</pre>
753
754
h3. subscriptionLive (Added in version 9)
755
756
Return a timeshifted session to live. Reply will be asynchronous subscriptionSkip().
757
758
Request message fields:
759
<pre>
760
subscriptionId     u32   required   Subscription ID.
761
</pre>
762
763
Reply message fields:
764
<pre>
765
None
766 82 Jaroslav Kysela
</pre>
767 1 Andreas Smas
768 83 Jaroslav Kysela
h3. subscriptionFilterStream (Added in version 12)
769 1 Andreas Smas
770 83 Jaroslav Kysela
Enable or disable specified streams by index.
771
772
Request message fields:
773
<pre>
774
subscriptionId     u32        required   Subscription ID.
775
enable             list[u32]  optional   Enable stream indexes
776
disable            list[u32]  optional   Disable (filter out) stream indexes
777
</pre>
778
779
Reply message fields:
780 1 Andreas Smas
<pre>
781
None
782 109 Jaroslav Kysela
</pre>
783
784
---
785
786
h3. getProfiles (Added in version 16)
787
788
Return a list of stream profiles (configurations).
789
790
Reply message fields:
791
<pre>
792
profiles           msg[]      optional   Supported profiles
793
</pre>
794
795
Message fields:
796
<pre>
797
uuid               str        required   Profile ID
798
name               str        required   Profile Name
799
comment            str        required   Profile Comment
800 83 Jaroslav Kysela
</pre>
801
802
h3. getCodecs (Added in version 11, Removed in version 16)
803
804 82 Jaroslav Kysela
Return a list of encoders (codecs).
805
806 1 Andreas Smas
Reply message fields:
807 82 Jaroslav Kysela
<pre>
808 83 Jaroslav Kysela
encoders           list[str]  optional   Supported encoders
809 82 Jaroslav Kysela
</pre>
810
811 70 Adam Sutton
h3. fileOpen (Added in version 8)
812 69 Adam Sutton
813
Open a file within the Tvheadend file system. This is now the preferred method (in place of HTTP) for accessing recordings.
814
815
Accessing recordings via HTSP will overcome the limitations of standard HTTP streaming which cannot handle both skipping and growing files (i.e. in-progress recordings) at the same time.
816
817 1 Andreas Smas
Request message fields:
818 69 Adam Sutton
<pre>
819 70 Adam Sutton
file               str   required   File path to open
820 1 Andreas Smas
</pre>
821
822 70 Adam Sutton
Valid file paths:
823
<pre>
824
/dvrfile/ID        will open the file associated with DVR entry ID
825 74 Adam Sutton
/imagecache/ID     will open the file associated with imagecache entry ID (Note: only works for HTSPv10+)
826 70 Adam Sutton
</pre>
827
828 69 Adam Sutton
Reply message fields:
829
<pre>
830
id                 u32   required   The file handle used for further file operations
831
size               u64   optional   The size of the file in bytes
832 1 Andreas Smas
mtime              u64   optional   The last time the file was modified
833 69 Adam Sutton
</pre>
834
835 70 Adam Sutton
h3. fileRead (Added in version 8)
836 69 Adam Sutton
837 1 Andreas Smas
Read data from a file.
838
839 69 Adam Sutton
Request message fields:
840
<pre>
841
id                 u32   required   The file handle used for further file operations
842 70 Adam Sutton
size               u64   required   The amount of data to read
843
offset             u64   optional   Offset into the file to read (default is current position)
844 69 Adam Sutton
</pre>
845 1 Andreas Smas
846 69 Adam Sutton
Reply message fields:
847
<pre>
848
data               bin   required   The data read from the file (size may be less than requested)
849
</pre>
850
851 70 Adam Sutton
h3. fileClose (Added in version 8)
852 69 Adam Sutton
853
Close an opened file.
854
855
Request message fields:
856
<pre>
857 1 Andreas Smas
id                 u32   required   The file handle to be closed
858 69 Adam Sutton
</pre>
859
860
Reply message fields:
861
<pre>
862
None
863
</pre>
864 70 Adam Sutton
865 69 Adam Sutton
h3. fileStat (Added in version 8)
866
867
Get status of a file.
868
869
Request message fields:
870
<pre>
871
id                 u32   required   The file handle to be stat'd
872 1 Andreas Smas
</pre>
873
874
Reply message fields:
875
<pre>
876
size               u64   optional   The size of the file in bytes
877
mtime              u64   optional   The last time the file was modified
878
</pre>
879 70 Adam Sutton
880
h3. fileSeek (Added in version 8)
881
882
Seek to position in a file.
883
884
Request message fields:
885
<pre>
886
id                 u32   required   The file handle to be stat'd
887
offset             u64   required   The position to seek in the file
888
whence             str   required   Where to seek relative to (default=SEEK_SET)
889
</pre>
890
891
Note: valid values for whence
892
<pre>
893
SEEK_SET           Seek relative to start of file
894
SEEK_CUR           Seek relative to current position in file
895 72 Adam Sutton
SEEK_END           Seek relative (backwards) to end of file
896 70 Adam Sutton
</pre>
897
898
Reply message fields:
899
<pre>
900
offset             u64   optional   The new absolute position within the file
901
</pre>
902 66 Adam Sutton
903 1 Andreas Smas
h1. Server to Client methods
904
905
----
906
907
h3. channelAdd
908
909
A new channel has been created on the server.
910
911
Message fields:
912
<pre>
913
channelId          u32   required   ID of channel.
914 66 Adam Sutton
channelNumber      u32   required   Channel number, 0 means unconfigured.
915 90 Jaroslav Kysela
channelNumberMinor u32   optional   Minor channel number (Added in version 13).
916 1 Andreas Smas
channelName        str   required   Name of channel.
917 70 Adam Sutton
channelIcon        str   optional   URL to an icon representative for the channel
918
                                    (For v8+ clients this could be a relative /imagecache/ID URL
919 73 Adam Sutton
                                     intended to be fed to fileOpen() or HTTP server)
920 104 Jaroslav Kysela
                                    (For v15+ clients this could be a relative imagecache/ID URL
921
                                     intended to be fed to fileOpen() or HTTP server)
922 66 Adam Sutton
eventId            u32   optional   ID of the current event on this channel.
923
nextEventId        u32   optional   ID of the next event on the channel.
924
tags               u32[] optional   Tags this channel is mapped to.
925
services           msg[] optional   List of available services (Added in version 5)
926 13 Andreas Smas
</pre>
927 1 Andreas Smas
928 66 Adam Sutton
Service fields:
929 1 Andreas Smas
<pre>
930 66 Adam Sutton
name               str   required   Service name
931
type               str   required   Service type
932
caid               u32   optional   Encryption CA ID
933
caname             str   optional   Encryption CA name
934 11 Andreas Smas
</pre>
935 1 Andreas Smas
936 66 Adam Sutton
h3. channelUpdate
937 11 Andreas Smas
938 66 Adam Sutton
Same as channelAdd, but all fields (except channelId) are optional.
939
940 58 sbi -
h3. channelDelete
941 1 Andreas Smas
942
A channel has been deleted on the server.
943 58 sbi -
944
Message fields:
945 1 Andreas Smas
<pre>
946
channelId          u32   required   ID of channel.
947
</pre>
948
949
----
950
951 11 Andreas Smas
h3. tagAdd
952 1 Andreas Smas
953
A new tag has been created on the server.
954
955
Message fields:
956
<pre>
957 66 Adam Sutton
tagId              u32   required   ID of tag.
958
tagName            str   required   Name of tag.
959 117 Jaroslav Kysela
tagIndex           u32   optional   Index value for sorting (default by from min to max) (Added in version 18).
960 66 Adam Sutton
tagIcon            str   optional   URL to an icon representative for the channel.
961
tagTitledIcon      u32   optional   Icon includes a title
962 1 Andreas Smas
members            u32[] optional   Channel IDs of those that belong to the tag
963 11 Andreas Smas
</pre>
964 39 elupus -
965 58 sbi -
h3. tagUpdate
966 66 Adam Sutton
967 11 Andreas Smas
Same as tagAdd, but all fields (except tagId) are optional.
968
969 1 Andreas Smas
h3. tagDelete
970 58 sbi -
971 1 Andreas Smas
A tag has been deleted from the server.
972
973
Message fields:
974 66 Adam Sutton
<pre>
975 58 sbi -
tagId              u32   required   ID of tag.
976
</pre>
977 12 Andreas Smas
978 1 Andreas Smas
----
979 66 Adam Sutton
980 58 sbi -
h3. dvrEntryAdd (Added in version 4)
981 1 Andreas Smas
982 58 sbi -
A new recording has been created on the server.
983 1 Andreas Smas
984 2 Andreas Smas
Message fields:
985 66 Adam Sutton
<pre>
986
id                 u32   required   ID of dvrEntry.
987
channel            u32   required   Channel of dvrEntry.
988
start              s64   required   Time of when this entry was scheduled to start recording.
989 89 Jaroslav Kysela
stop               s64   required   Time of when this entry was scheduled to stop recording.
990
startExtra         s64   required   Extra start time (pre-time) in minutes (Added in version 13).
991 1 Andreas Smas
stopExtra          s64   required   Extra stop time (post-time) in minutes (Added in version 13).
992
retention          s64   required   DVR Entry retention time in days.
993 89 Jaroslav Kysela
priority           u32   required   Priority (0 = Important, 1 = High, 2 = Normal, 3 = Low, 4 = Unimportant, 5 = Not set) (Added in version 13).
994
eventId            u32   optional   Associated EPG Event ID (Added in version 13).
995 117 Jaroslav Kysela
autorecId          str   optional   Associated Autorec UUID (Added in version 13).
996
timerecId          str   optional   Associated Timerec UUID (Added in version 18).
997 89 Jaroslav Kysela
contentType        u32   optional   Content Type (like in the DVB standard) (Added in version 13).
998 66 Adam Sutton
title              str   optional   Title of recording
999 1 Andreas Smas
summary            str   optional   Short description of the recording (Added in version 6).
1000
description        str   optional   Long description of the recording.
1001 66 Adam Sutton
state              str   required   Recording state
1002
error              str   optional   Plain english error description (e.g. "Aborted by user").
1003 117 Jaroslav Kysela
owner              str   optional   Name of the entry owner (Added in version 18).
1004
creator            str   optional   Name of the entry creator (Added in version 18).
1005 1 Andreas Smas
</pre>
1006 66 Adam Sutton
1007 48 mdd -
TODO: recording states
1008
1009
h3. dvrEntryUpdate
1010 66 Adam Sutton
1011
Message fields:
1012
<pre>
1013
Same as dvrEntryAdd, but all fields (except id) are optional.
1014 51 elupus -
</pre>
1015 66 Adam Sutton
1016 58 sbi -
h3. dvrEntryDelete (Added in version 4)
1017 66 Adam Sutton
1018 58 sbi -
A recording has been deleted from the server.
1019 48 mdd -
1020
Message fields:
1021 66 Adam Sutton
<pre>
1022 1 Andreas Smas
id                 u32   required   ID of recording to delete.
1023 48 mdd -
</pre>
1024 58 sbi -
1025 48 mdd -
----
1026 95 Jaroslav Kysela
1027
h3. autorecEntryAdd (Added in version 13)
1028
1029
A new autorec recording has been created on the server.
1030
1031 1 Andreas Smas
Message fields:
1032 95 Jaroslav Kysela
<pre>
1033
id                 str   required   ID (string!) of dvrAutorecEntry.
1034
enabled            u32   required   If autorec entry is enabled (activated).
1035 117 Jaroslav Kysela
name               str   required   Name of the autorec entry (Added in version 18).
1036 95 Jaroslav Kysela
minDuration        u32   required   Minimal duration in seconds (0 = Any).
1037
maxDuration        u32   required   Maximal duration in seconds (0 = Any).
1038
retention          u32   required   Retention time (in days).
1039
daysOfWeek         u32   required   Bitmask - Days of week (0x01 = Monday, 0x40 = Sunday, 0x7f = Whole Week, 0 = Not set).
1040
priority           u32   required   Priority (0 = Important, 1 = High, 2 = Normal, 3 = Low, 4 = Unimportant, 5 = Not set).
1041
approxTime         u32   required   Minutes from midnight (up to 24*60).
1042 1 Andreas Smas
startExtra         s64   required   Extra start minutes (pre-time).
1043
stopExtra          s64   required   Extra stop minutes (post-time).
1044 95 Jaroslav Kysela
title              str   optional   Title.
1045 122 Jaroslav Kysela
directory          str   optional   Forced directory name (Added in version 19).
1046 95 Jaroslav Kysela
channel            u32   optional   Channel ID.
1047 117 Jaroslav Kysela
owner              str   optional   Owner of this autorec entry (Added in version 18).
1048
creator            str   optional   Creator of this autorec entry (Added in version 18).
1049 95 Jaroslav Kysela
</pre>
1050 1 Andreas Smas
1051 95 Jaroslav Kysela
h3. autorecEntryUpdate (Added in version 13)
1052
1053
Message fields:
1054
<pre>
1055 117 Jaroslav Kysela
Same as autorecEntryAdd but all fields (except id) are optional.
1056 95 Jaroslav Kysela
</pre>
1057
1058 1 Andreas Smas
h3. autorecEntryDelete (Added in version 13)
1059
1060
Message fields:
1061
<pre>
1062
id                 str   required   Autorec Entry ID (string!)
1063 117 Jaroslav Kysela
</pre>
1064
1065
----
1066
1067 118 Jaroslav Kysela
h3. timerecEntryAdd (Added in version 18)
1068 117 Jaroslav Kysela
1069
A new autorec recording has been created on the server.
1070
1071
Message fields:
1072
<pre>
1073
title              str   required   Title for the recordings.
1074 123 Jaroslav Kysela
directory          str   optional   Forced directory name (Added in version 19).
1075 117 Jaroslav Kysela
enabled            u32   required   Title for the recordings.
1076
name               str   required   Name for this timerec entry.
1077
configName         str   required   DVR Configuration Name / UUID.
1078
channelId          u32   required   Channel ID.
1079
daysOfWeek         u32   optional   Bitmask - Days of week (0x01 = Monday, 0x40 = Sunday, 0x7f = Whole Week, 0 = Not set).
1080
priority           u32   optional   Priority (0 = Important, 1 = High, 2 = Normal, 3 = Low, 4 = Unimportant, 5 = Not set).
1081
start              u32   required   Minutes from midnight (up to 24*60) for the start of the time window (including)
1082
stop               u32   required   Minutes from modnight (up to 24*60) for the end of the time window (including, cross-noon allowed)
1083
retention          u32   optional   Retention in days. 
1084
comment            str   optional   User Comment.
1085
owner              str   optional   Owner of this timerec entry.
1086
creator            str   optional   Creator of this timerec entry.
1087
</pre>
1088
1089
h3. timerecEntryUpdate (Added in version 18)
1090
1091
Message fields:
1092
<pre>
1093
Same as timerecEntryAdd but all fields (except id) are optional.
1094
</pre>
1095
1096
h3. timerecEntryDelete (Added in version 18)
1097
1098
Message fields:
1099
<pre>
1100
id                 str   required   Timerec Entry ID (string!)
1101 95 Jaroslav Kysela
</pre>
1102
1103
----
1104
1105 66 Adam Sutton
h3. eventAdd (Added in version 6)
1106 48 mdd -
1107 66 Adam Sutton
Message fields:
1108
<pre>
1109
eventId            u32   required   Event ID
1110
channelId          u32   required   The channel this event is related to.
1111
start              u64   required   Start time of event, UNIX time.
1112
stop               u64   required   Ending time of event, UNIX time.
1113
title              str   optional   Title of event.
1114
summary            str   optional   Short description of the event (Added in version 6).
1115
description        str   optional   Long description of the event.
1116
serieslinkId       u32   optional   Series Link ID (Added in version 6).
1117
episodeId          u32   optional   Episode ID (Added in version 6).
1118
seasonId           u32   optional   Season ID (Added in version 6).
1119
brandId            u32   optional   Brand ID (Added in version 6).
1120
contentType        u32   optional   DVB content code (Added in version 4, Modified in version 6*).
1121
ageRating          u32   optional   Minimum age rating (Added in version 6).
1122
starRating         u32   optional   Star rating (1-5) (Added in version 6).
1123
firstAired         s64   optional   Original broadcast time, UNIX time (Added in version 6).
1124
seasonNumber       u32   optional   Season number (Added in version 6).
1125
seasonCount        u32   optional   Show season count (Added in version 6).
1126
episodeNumber      u32   optional   Episode number (Added in version 6).
1127
episodeCount       u32   optional   Season episode count (Added in version 6).
1128
partNumber         u32   optional   Multi-part episode part number (Added in version 6).
1129
partCount          u32   optional   Multi-part episode part count (Added in version 6).
1130
episodeOnscreen    str   optional   Textual representation of episode number (Added in version 6).
1131
image              str   optional   URL to a still capture from the episode (Added in version 6).
1132
dvrId              u32   optional   ID of a recording (Added in version 5).
1133
nextEventId        u32   optional   ID of next event on the same channel.
1134
</pre>
1135 48 mdd -
1136 66 Adam Sutton
* *contentType previously had the major DVB category in the bottom 4 bits, 
1137
  however in v6 this has been changed to properly match DVB, so top 4 bits
1138
  as major category and bottom 4 bits has sub-category. Clients requesting
1139
  v5 or lower will get the old output.
1140 48 mdd -
1141 66 Adam Sutton
h3. eventUpdate (Added in version 6)
1142 35 Andreas Smas
1143 58 sbi -
Message fields:
1144
<pre>
1145 66 Adam Sutton
Same as eventAdd but all fields (except eventId) are optional.
1146 35 Andreas Smas
</pre>
1147 58 sbi -
1148 77 John Törnblom
h3. eventDelete (Added in version 6)
1149 35 Andreas Smas
1150 66 Adam Sutton
Message fields:
1151
<pre>
1152
eventId            u32   required   Event ID
1153
</pre>
1154 14 Andreas Smas
1155 66 Adam Sutton
---
1156 14 Andreas Smas
1157 66 Adam Sutton
h3. initialSyncCompleted (Added in version 2)
1158 14 Andreas Smas
1159 66 Adam Sutton
Sent after all the initial metadata has been sent when session has been set to async mode.
1160 38 Andreas Smas
1161
Message fields:
1162 14 Andreas Smas
<pre>
1163
</pre>
1164
1165
----
1166
1167
h3. subscriptionStart
1168 53 Andreas Smas
1169 66 Adam Sutton
Asynchronous message output when a new subscription is successfully started.
1170 14 Andreas Smas
1171
Message fields:
1172 1 Andreas Smas
<pre>
1173 66 Adam Sutton
subscriptionId     u32   required   Subscription ID.
1174
streams            msg[] required   Array of messages with stream information
1175
sourceinfo         msg   optional   Source information.
1176
</pre>
1177 37 Andreas Smas
1178 66 Adam Sutton
Stream message fields:
1179
<pre>
1180
index              u32   required   Index for this stream
1181
type               str   required   Type of stream
1182 113 Jaroslav Kysela
meta               bin   optional   Codec metadata (private data, libav - extradata) (Added in version 17)
1183 66 Adam Sutton
language           str   optional   Language for stream
1184
Video components only:
1185
width              u32   optional   Width of video in pixels
1186
height             u32   optional   Height of video in pixels
1187 68 Andreas Smas
aspect_num         u32   optional   Aspect ratio numerator (Added in version 5) *Can be incorrect and should not be relied upon*
1188
aspect_den         u32   optional   Aspect ratio denonminator (Added in version 5) *Can be incorrect and should not be relied upon*
1189 66 Adam Sutton
Audio components only:
1190 76 Dave Chapman
audio_type         u32   optional   Audio type - 0=Normal; 1=Clean effects; 2=Hearing impaired; 3=Visually impaired commentary; 4-255=Reserved (Added in version 11)
1191 66 Adam Sutton
channels           u32   optional   Number of audio channels (Added in version 5)
1192
rate               u32   optional   Audio bitrate (Added in version 5)
1193
Subtitle components only:
1194
composition_id     u32   optional   ??? (Added in version 5)
1195
ancillary_id       u32   optional   ??? (Added in version 5)
1196
</pre>
1197 2 Andreas Smas
1198 66 Adam Sutton
Sourceinfo message fields:
1199
<pre>
1200
adapter            str   optional   Adapter name
1201
mux                str   optional   Transponder name
1202
network            str   optional   Network name
1203
provider           str   optional   ???
1204
service            str   optional   Service name
1205
</pre>
1206 15 Andreas Smas
1207 66 Adam Sutton
Video Stream types:
1208 1 Andreas Smas
<pre>
1209 79 Jaroslav Kysela
MPEG2VIDEO                    MPEG2 video, meta field is present (configuration blocks)
1210
H264                          H264 video, meta field is present (configuration blocks)
1211
HEVC                          HEVC video, meta field is present (configuration blocks)
1212 66 Adam Sutton
</pre>
1213 15 Andreas Smas
1214 1 Andreas Smas
Audio Stream types:
1215
<pre>
1216 66 Adam Sutton
MPEG2AUDIO                    MPEG2 audio (MP2)
1217
AC3                           AC3 audio
1218 79 Jaroslav Kysela
AAC                           ADTS framed AAC (one AAC packet per ADTS frame), meta field is present (MPEG4 config)
1219 66 Adam Sutton
EAC3                          Enhanced AC3 audio
1220 79 Jaroslav Kysela
VORBIS                        Vorbis audio, meta field is present with the main vorbis header
1221 16 Andreas Smas
</pre>
1222
1223 66 Adam Sutton
Subtitle Stream types:
1224
<pre>
1225
TELETEXT                      ???
1226
DVBSUB                        ???
1227
</pre>
1228 55 Lars Op den Kamp -
1229 112 Jaroslav Kysela
h3. subscriptionGrace
1230
1231
Notifies client about the grace timeout (timeout for stream activation). It can be issues multiple times.
1232
For example a configuration with satellite rotors requires more than 120 seconds to tune, so users
1233
should be notified..
1234
1235
Message fields:
1236
<pre>
1237
subscriptionId     u32   required   Subscription ID.
1238
graceTimeout       u32   required   Grace timeout in seconds.
1239
</pre>
1240
1241 55 Lars Op den Kamp -
h3. subscriptionStop
1242
1243 66 Adam Sutton
A subscription has been stopped.
1244 55 Lars Op den Kamp -
1245
Message fields:
1246
<pre>
1247 66 Adam Sutton
subscriptionId     u32   required   Subscription ID.
1248 1 Andreas Smas
status             str   optional   Error message if subscription stopped unexpectedly.
1249
</pre>
1250
1251 73 Adam Sutton
h3. subscriptionSkip (Added version 9)
1252
1253
A subscription has been skipped.
1254
1255
Message fields:
1256
<pre>
1257
subscriptionId     u32   required   Subscription ID.
1258
error              u32   optional   The last skip command caused an error.
1259
absolute           u32   optional   Indicates the output is absolute (Note: should always be 1 at the moment)
1260
time               u64   optional   The time the subscription has skipped to.
1261
size               u64   optional   The position in the file we've skipped to (Note: not currently used).
1262
</pre>
1263
1264
h3. subscriptionSpeed (Added version 9)
1265
1266
A subscription's playback speed has changed.
1267
1268
This can happen even without a speed request, should playback reach either end of the buffer.
1269
1270
Message fields:
1271
<pre>
1272
subscriptionId     u32   required   Subscription ID.
1273
speed              u32   required   The new speed of the subscription
1274
</pre>
1275
1276 55 Lars Op den Kamp -
h3. subscriptionStatus
1277
1278 66 Adam Sutton
Subscription status update.
1279 58 sbi -
1280
Message fields:
1281
<pre>
1282 66 Adam Sutton
subscriptionId     u32   required   Subscription ID.
1283
status             str   optional   English clear text of error status. Absence of this field means that the status is OK. 
1284 16 Andreas Smas
</pre>
1285 58 sbi -
1286 16 Andreas Smas
h3. queueStatus
1287
1288 1 Andreas Smas
The queueStatus message is sent every second during normal data delivery.
1289 60 John Törnblom
1290
The transmit scheduler have different drop thresholds for different frame types.
1291 66 Adam Sutton
1292 1 Andreas Smas
If congestion occurs it will favor dropping B-frames before P-frames before I-frames.
1293
All audio is recognized as I-frames. 
1294 58 sbi -
1295 1 Andreas Smas
Message fields:
1296
<pre>
1297 66 Adam Sutton
subscriptionId     u32   required   Subscription ID.
1298
packets            u32   required   Number of data packets in queue.
1299
bytes              u32   required   Number of bytes in queue.
1300
delay              u32   optional   Estimated delay of queue (in µs).
1301 1 Andreas Smas
Bdrops             u32   required   Number of B-frames dropped
1302 66 Adam Sutton
Pdrops             u32   required   Number of P-frames dropped
1303
Idrops             u32   required   Number of I-frames dropped
1304 73 Adam Sutton
delay              s64   required   Delta between first and last DTS (Added in version 9)
1305 1 Andreas Smas
</pre>
1306
1307
h3. signalStatus
1308
1309
The signalStatus message is sent every second during normal data delivery.
1310
1311
The optional fields may not have been implemented or may not be supported by the active adapter.
1312
1313
Message fields:
1314
<pre>
1315 66 Adam Sutton
subscriptionId     u32   required   Subscription ID.
1316
feStatus           str   required   Frontend status.
1317
feSNR              u32   optional   Signal to noise ratio.
1318 1 Andreas Smas
feSignal           u32   optional   Signal status percentage.
1319
feBER              u32   optional   Bit error rate.
1320
feUNC              u32   optional   Uncorrected blocks.
1321 73 Adam Sutton
</pre>
1322
1323
h3. timeshiftStatus
1324
1325
Provide status every second about the timeshift buffer.
1326
1327
Message fields:
1328
<pre>
1329
subscriptionId     u32   required   Subscription ID.
1330
full               u32   required   Indicates whether the buffer is full
1331
shift              s64   required   Current position relative to live
1332
start              s64   optional   PTS of the first frame in the buffer
1333
end                s64   optional   PTS of the last frame in the buffer
1334 1 Andreas Smas
</pre>
1335
1336
h3. muxpkt
1337
1338
Streaming data.
1339
1340
Message fields:
1341
<pre>
1342 66 Adam Sutton
subscriptionId     u32   required   Subscription ID.
1343
frametype          u32   required   Type of frame as ASCII value: 'I', 'P', 'B'
1344
stream             u32   required   Stream index. Corresponds to the streams reported in the subscriptionStart message.
1345
dts                s64   optional   Decode Time Stamp in µs.
1346
pts                s64   optional   Presentation Time Stamp in µs.
1347
duration           u32   required   Duration of frame in µs.
1348
payload            bin   required   Actual frame data.
1349 1 Andreas Smas
</pre>