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Htsp » History » Version 134

Jaroslav Kysela, 2015-05-29 22:25

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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).
573 134 Jaroslav Kysela
dupDetect          u32   optional   Dup Detect (0 = all, 1 = diff episode, 2 = diff subtitle, 3 = diff description, 4 = once per week, 5 = once per day) (Added in version 20).
574 91 Jaroslav Kysela
comment            str   optional   User Comment.
575
</pre>
576 83 Jaroslav Kysela
577
Reply message fields:
578
<pre>
579
success            u32   required   1 if entry was added, 0 otherwise
580
id                 str   optional   ID (string!) of created autorec DVR entry
581
error              str   optional   English clear text of error message
582
</pre>
583
584
h3. deleteAutorecEntry (Added in version 13)
585
586
Delete an existing autorec DVR entry from the database.
587
588
Request message fields:
589
<pre>
590
id                 str   required   Autorec DVR Entry ID (string!)
591
</pre>
592
593
Reply message fields:
594
<pre>
595
success            u32   required   1 if entry was removed
596
error              str   optional   Error message if the delete fails
597 1 Andreas Smas
</pre>
598 83 Jaroslav Kysela
599 117 Jaroslav Kysela
---
600 1 Andreas Smas
601 117 Jaroslav Kysela
h3. addTimerecEntry (Added in version 18)
602
603
Create a new Timerec DVR entry. Title must be specified.
604
605
Request message fields:
606
<pre>
607 129 Jaroslav Kysela
enabled            u32   optional   Enabled flag (Added in version 19).
608 117 Jaroslav Kysela
title              str   required   Title for the recordings.
609 125 Jaroslav Kysela
directory          str   optional   Forced output directory name (Added in version 19).
610 117 Jaroslav Kysela
name               str   optional   Name for this timerec entry.
611
configName         str   optional   DVR Configuration Name / UUID.
612
channelId          u32   required   Channel ID.
613
daysOfWeek         u32   optional   Bitmask - Days of week (0x01 = Monday, 0x40 = Sunday, 0x7f = Whole Week, 0 = Not set).
614
priority           u32   optional   Priority (0 = Important, 1 = High, 2 = Normal, 3 = Low, 4 = Unimportant, 5 = Not set).
615
start              u32   required   Minutes from midnight (up to 24*60) for the start of the time window (including)
616
stop               u32   required   Minutes from modnight (up to 24*60) for the end of the time window (including, cross-noon allowed)
617
retention          u32   optional   Retention in days. 
618
comment            str   optional   User Comment.
619
</pre>
620
621
Reply message fields:
622
<pre>
623
success            u32   required   1 if entry was added, 0 otherwise
624
id                 str   optional   ID (string!) of created timerec DVR entry
625
error              str   optional   English clear text of error message
626
</pre>
627
628
h3. deleteTimerecEntry (Added in version 18)
629
630
Delete an existing timerec DVR entry from the database.
631
632
Request message fields:
633
<pre>
634
id                 str   required   Timerec DVR Entry ID (string!)
635
</pre>
636
637
Reply message fields:
638
<pre>
639
success            u32   required   1 if entry was removed
640
error              str   optional   Error message if the delete fails
641
</pre>
642
643
----
644
645 66 Adam Sutton
h3. getTicket (Added in version 5)
646 1 Andreas Smas
647 66 Adam Sutton
Get a ticket to allow access to a channel or recording via HTTP
648 1 Andreas Smas
649 66 Adam Sutton
Request message fields:
650 1 Andreas Smas
<pre>
651 66 Adam Sutton
channelId          u32  optional   Channel to gain access for
652
dvrId              u32  optional   DVR file to gain access for
653 1 Andreas Smas
</pre>
654
655
Reply message fields:
656
<pre>
657 66 Adam Sutton
path               str  required   The full path for access URL (no scheme, host or port)
658
ticket             str  required   The ticket to pass in the URL query string
659 1 Andreas Smas
</pre>
660
661 66 Adam Sutton
h3. subscribe
662 1 Andreas Smas
663 66 Adam Sutton
Request subscription to the given channel. 
664 1 Andreas Smas
665 66 Adam Sutton
Request message fields:
666
<pre>
667
channelId          u32   required   ID for channel. 
668
subscriptionId     u32   required   Subscription ID. Selected by client. This value is not interpreted by the server in any form. 
669
                                    The value is used from now on in all messages related to the subscription.
670 1 Andreas Smas
weight             u32   optional   Weighting of this subscription (same as recording priority).
671 73 Adam Sutton
90khz              u32   optional   Request PTS/DTS in default 90kHz timebase, default is 1MHz (Added in version 7)
672
normts             u32   optional   Request PTS/DTS normalisation (Added in version 7)
673
                                    Note: this will mean missing timestamps are added, first packet should be ~0 and will always be an i-frame.
674
                                    Note: this is implied if timeshiftPeriod is enabled
675 114 Jaroslav Kysela
                                    Note: from version 17, this is always enabled and this parameter is ignored.
676 73 Adam Sutton
queueDepth         u32   optional   Change the default packet queue lengths, default 500000 bytes (Added in version 7)
677
                                    Note: I-frame depth is 3*queueDepth, P-frame is 2*queueDepth and B-frame is queueDepth
678
timeshiftPeriod    u32   optional   The number of seconds to keep in the timeshift buffer (Added in version 9)
679
                                    Note: this may be bounded by server configuration settings
680 108 Jaroslav Kysela
profile            str   optional   Select stream profile (Added in version 16).
681 11 Andreas Smas
</pre>
682 66 Adam Sutton
683 1 Andreas Smas
Reply message fields:
684
<pre>
685 73 Adam Sutton
90khz              u32   optional   Indicates 90khz timestamps will be used
686
normts             u32   optional   Indicates timestamps will be normalised (and fixed)
687
timeshiftPeriod    u32   optional   The actual timeshiftPeriod to be used
688 66 Adam Sutton
</pre>
689 1 Andreas Smas
690 66 Adam Sutton
h3. unsubscribe
691
692
Stop a subscription.
693
694
Request message fields:
695 1 Andreas Smas
<pre>
696 66 Adam Sutton
subscriptionId     u32   required   Subscription ID.
697 58 sbi -
</pre>
698
699 11 Andreas Smas
Reply message fields:
700 1 Andreas Smas
<pre>
701 66 Adam Sutton
None
702 58 sbi -
</pre>
703 11 Andreas Smas
704 66 Adam Sutton
h3. subscriptionChangeWeight (Added in version 5)
705 1 Andreas Smas
706 66 Adam Sutton
Change the weight of an existing subscription
707 1 Andreas Smas
708 66 Adam Sutton
Request message fields:
709
<pre>
710
subscriptionId     u32   required   Subscription ID.
711
weight             u32   optional   The new subscription weight.
712 1 Andreas Smas
</pre>
713
714
Reply message fields:
715
<pre>
716 69 Adam Sutton
None
717 1 Andreas Smas
</pre>
718
719 73 Adam Sutton
h3. subscriptionSkip (Added in version 9)
720
721
Skip a timeshift enabled subscription. The response will be asynchronous subscriptionSkip().
722
723
Request message fields:
724
<pre>
725
subscriptionId     u32   required   Subscription ID.
726
absolute           u32   optional   The skip request is absolute
727
time               u64   optional   Specify skip using time (units are as for PTS)
728
size               u64   optional   Specify skip using size (Not currently used)
729
</pre>
730
731
Reply message fields:
732
<pre>
733
None
734
</pre>
735
736
h3. subscriptionSeek (Added in version 9)
737
738
Synonym for subscriptionSkip
739
740
h3. subscriptionSpeed (Added in version 9)
741
742
Set the playback speed for the subscription. The response will be asynchronous subscriptionSpeed().
743
744
Request message fields:
745
<pre>
746
subscriptionId     u32   required   Subscription ID.
747
speed              u32   required   Specify speed (0=pause, 100=1x fwd, -100=1x backward)
748
</pre>
749
750
Reply message fields:
751
<pre>
752
None
753
</pre>
754
755
h3. subscriptionLive (Added in version 9)
756
757
Return a timeshifted session to live. Reply will be asynchronous subscriptionSkip().
758
759
Request message fields:
760
<pre>
761
subscriptionId     u32   required   Subscription ID.
762
</pre>
763
764
Reply message fields:
765
<pre>
766
None
767 82 Jaroslav Kysela
</pre>
768 1 Andreas Smas
769 83 Jaroslav Kysela
h3. subscriptionFilterStream (Added in version 12)
770 1 Andreas Smas
771 83 Jaroslav Kysela
Enable or disable specified streams by index.
772
773
Request message fields:
774
<pre>
775
subscriptionId     u32        required   Subscription ID.
776
enable             list[u32]  optional   Enable stream indexes
777
disable            list[u32]  optional   Disable (filter out) stream indexes
778
</pre>
779
780
Reply message fields:
781 1 Andreas Smas
<pre>
782
None
783 109 Jaroslav Kysela
</pre>
784
785
---
786
787
h3. getProfiles (Added in version 16)
788
789
Return a list of stream profiles (configurations).
790
791
Reply message fields:
792
<pre>
793
profiles           msg[]      optional   Supported profiles
794
</pre>
795
796
Message fields:
797
<pre>
798
uuid               str        required   Profile ID
799
name               str        required   Profile Name
800
comment            str        required   Profile Comment
801 83 Jaroslav Kysela
</pre>
802
803
h3. getCodecs (Added in version 11, Removed in version 16)
804
805 82 Jaroslav Kysela
Return a list of encoders (codecs).
806
807 1 Andreas Smas
Reply message fields:
808 82 Jaroslav Kysela
<pre>
809 83 Jaroslav Kysela
encoders           list[str]  optional   Supported encoders
810 82 Jaroslav Kysela
</pre>
811
812 70 Adam Sutton
h3. fileOpen (Added in version 8)
813 69 Adam Sutton
814
Open a file within the Tvheadend file system. This is now the preferred method (in place of HTTP) for accessing recordings.
815
816
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.
817
818 1 Andreas Smas
Request message fields:
819 69 Adam Sutton
<pre>
820 70 Adam Sutton
file               str   required   File path to open
821 1 Andreas Smas
</pre>
822
823 70 Adam Sutton
Valid file paths:
824
<pre>
825
/dvrfile/ID        will open the file associated with DVR entry ID
826 74 Adam Sutton
/imagecache/ID     will open the file associated with imagecache entry ID (Note: only works for HTSPv10+)
827 70 Adam Sutton
</pre>
828
829 69 Adam Sutton
Reply message fields:
830
<pre>
831
id                 u32   required   The file handle used for further file operations
832
size               u64   optional   The size of the file in bytes
833 1 Andreas Smas
mtime              u64   optional   The last time the file was modified
834 69 Adam Sutton
</pre>
835
836 70 Adam Sutton
h3. fileRead (Added in version 8)
837 69 Adam Sutton
838 1 Andreas Smas
Read data from a file.
839
840 69 Adam Sutton
Request message fields:
841
<pre>
842
id                 u32   required   The file handle used for further file operations
843 70 Adam Sutton
size               u64   required   The amount of data to read
844
offset             u64   optional   Offset into the file to read (default is current position)
845 69 Adam Sutton
</pre>
846 1 Andreas Smas
847 69 Adam Sutton
Reply message fields:
848
<pre>
849
data               bin   required   The data read from the file (size may be less than requested)
850
</pre>
851
852 70 Adam Sutton
h3. fileClose (Added in version 8)
853 69 Adam Sutton
854
Close an opened file.
855
856
Request message fields:
857
<pre>
858 1 Andreas Smas
id                 u32   required   The file handle to be closed
859 69 Adam Sutton
</pre>
860
861
Reply message fields:
862
<pre>
863
None
864
</pre>
865 70 Adam Sutton
866 69 Adam Sutton
h3. fileStat (Added in version 8)
867
868
Get status of a file.
869
870
Request message fields:
871
<pre>
872
id                 u32   required   The file handle to be stat'd
873 1 Andreas Smas
</pre>
874
875
Reply message fields:
876
<pre>
877
size               u64   optional   The size of the file in bytes
878
mtime              u64   optional   The last time the file was modified
879
</pre>
880 70 Adam Sutton
881
h3. fileSeek (Added in version 8)
882
883
Seek to position in a file.
884
885
Request message fields:
886
<pre>
887
id                 u32   required   The file handle to be stat'd
888
offset             u64   required   The position to seek in the file
889
whence             str   required   Where to seek relative to (default=SEEK_SET)
890
</pre>
891
892
Note: valid values for whence
893
<pre>
894
SEEK_SET           Seek relative to start of file
895
SEEK_CUR           Seek relative to current position in file
896 72 Adam Sutton
SEEK_END           Seek relative (backwards) to end of file
897 70 Adam Sutton
</pre>
898
899
Reply message fields:
900
<pre>
901
offset             u64   optional   The new absolute position within the file
902
</pre>
903 66 Adam Sutton
904 1 Andreas Smas
h1. Server to Client methods
905
906
----
907
908
h3. channelAdd
909
910
A new channel has been created on the server.
911
912
Message fields:
913
<pre>
914
channelId          u32   required   ID of channel.
915 66 Adam Sutton
channelNumber      u32   required   Channel number, 0 means unconfigured.
916 90 Jaroslav Kysela
channelNumberMinor u32   optional   Minor channel number (Added in version 13).
917 1 Andreas Smas
channelName        str   required   Name of channel.
918 70 Adam Sutton
channelIcon        str   optional   URL to an icon representative for the channel
919
                                    (For v8+ clients this could be a relative /imagecache/ID URL
920 73 Adam Sutton
                                     intended to be fed to fileOpen() or HTTP server)
921 104 Jaroslav Kysela
                                    (For v15+ clients this could be a relative imagecache/ID URL
922
                                     intended to be fed to fileOpen() or HTTP server)
923 66 Adam Sutton
eventId            u32   optional   ID of the current event on this channel.
924
nextEventId        u32   optional   ID of the next event on the channel.
925
tags               u32[] optional   Tags this channel is mapped to.
926
services           msg[] optional   List of available services (Added in version 5)
927 13 Andreas Smas
</pre>
928 1 Andreas Smas
929 66 Adam Sutton
Service fields:
930 1 Andreas Smas
<pre>
931 66 Adam Sutton
name               str   required   Service name
932
type               str   required   Service type
933
caid               u32   optional   Encryption CA ID
934
caname             str   optional   Encryption CA name
935 11 Andreas Smas
</pre>
936 1 Andreas Smas
937 66 Adam Sutton
h3. channelUpdate
938 11 Andreas Smas
939 66 Adam Sutton
Same as channelAdd, but all fields (except channelId) are optional.
940
941 58 sbi -
h3. channelDelete
942 1 Andreas Smas
943
A channel has been deleted on the server.
944 58 sbi -
945
Message fields:
946 1 Andreas Smas
<pre>
947
channelId          u32   required   ID of channel.
948
</pre>
949
950
----
951
952 11 Andreas Smas
h3. tagAdd
953 1 Andreas Smas
954
A new tag has been created on the server.
955
956
Message fields:
957
<pre>
958 66 Adam Sutton
tagId              u32   required   ID of tag.
959
tagName            str   required   Name of tag.
960 117 Jaroslav Kysela
tagIndex           u32   optional   Index value for sorting (default by from min to max) (Added in version 18).
961 66 Adam Sutton
tagIcon            str   optional   URL to an icon representative for the channel.
962
tagTitledIcon      u32   optional   Icon includes a title
963 1 Andreas Smas
members            u32[] optional   Channel IDs of those that belong to the tag
964 11 Andreas Smas
</pre>
965 39 elupus -
966 58 sbi -
h3. tagUpdate
967 66 Adam Sutton
968 11 Andreas Smas
Same as tagAdd, but all fields (except tagId) are optional.
969
970 1 Andreas Smas
h3. tagDelete
971 58 sbi -
972 1 Andreas Smas
A tag has been deleted from the server.
973
974
Message fields:
975 66 Adam Sutton
<pre>
976 58 sbi -
tagId              u32   required   ID of tag.
977
</pre>
978 12 Andreas Smas
979 1 Andreas Smas
----
980 66 Adam Sutton
981 58 sbi -
h3. dvrEntryAdd (Added in version 4)
982 1 Andreas Smas
983 58 sbi -
A new recording has been created on the server.
984 1 Andreas Smas
985 2 Andreas Smas
Message fields:
986 66 Adam Sutton
<pre>
987
id                 u32   required   ID of dvrEntry.
988
channel            u32   required   Channel of dvrEntry.
989
start              s64   required   Time of when this entry was scheduled to start recording.
990 89 Jaroslav Kysela
stop               s64   required   Time of when this entry was scheduled to stop recording.
991
startExtra         s64   required   Extra start time (pre-time) in minutes (Added in version 13).
992 1 Andreas Smas
stopExtra          s64   required   Extra stop time (post-time) in minutes (Added in version 13).
993
retention          s64   required   DVR Entry retention time in days.
994 89 Jaroslav Kysela
priority           u32   required   Priority (0 = Important, 1 = High, 2 = Normal, 3 = Low, 4 = Unimportant, 5 = Not set) (Added in version 13).
995
eventId            u32   optional   Associated EPG Event ID (Added in version 13).
996 117 Jaroslav Kysela
autorecId          str   optional   Associated Autorec UUID (Added in version 13).
997
timerecId          str   optional   Associated Timerec UUID (Added in version 18).
998 89 Jaroslav Kysela
contentType        u32   optional   Content Type (like in the DVB standard) (Added in version 13).
999 66 Adam Sutton
title              str   optional   Title of recording
1000 1 Andreas Smas
summary            str   optional   Short description of the recording (Added in version 6).
1001
description        str   optional   Long description of the recording.
1002 66 Adam Sutton
state              str   required   Recording state
1003
error              str   optional   Plain english error description (e.g. "Aborted by user").
1004 117 Jaroslav Kysela
owner              str   optional   Name of the entry owner (Added in version 18).
1005
creator            str   optional   Name of the entry creator (Added in version 18).
1006 1 Andreas Smas
</pre>
1007 66 Adam Sutton
1008 48 mdd -
TODO: recording states
1009
1010
h3. dvrEntryUpdate
1011 66 Adam Sutton
1012
Message fields:
1013
<pre>
1014
Same as dvrEntryAdd, but all fields (except id) are optional.
1015 51 elupus -
</pre>
1016 66 Adam Sutton
1017 58 sbi -
h3. dvrEntryDelete (Added in version 4)
1018 66 Adam Sutton
1019 58 sbi -
A recording has been deleted from the server.
1020 48 mdd -
1021
Message fields:
1022 66 Adam Sutton
<pre>
1023 1 Andreas Smas
id                 u32   required   ID of recording to delete.
1024 48 mdd -
</pre>
1025 58 sbi -
1026 48 mdd -
----
1027 95 Jaroslav Kysela
1028
h3. autorecEntryAdd (Added in version 13)
1029
1030
A new autorec recording has been created on the server.
1031
1032 1 Andreas Smas
Message fields:
1033 95 Jaroslav Kysela
<pre>
1034
id                 str   required   ID (string!) of dvrAutorecEntry.
1035
enabled            u32   required   If autorec entry is enabled (activated).
1036 117 Jaroslav Kysela
name               str   required   Name of the autorec entry (Added in version 18).
1037 95 Jaroslav Kysela
minDuration        u32   required   Minimal duration in seconds (0 = Any).
1038
maxDuration        u32   required   Maximal duration in seconds (0 = Any).
1039
retention          u32   required   Retention time (in days).
1040
daysOfWeek         u32   required   Bitmask - Days of week (0x01 = Monday, 0x40 = Sunday, 0x7f = Whole Week, 0 = Not set).
1041
priority           u32   required   Priority (0 = Important, 1 = High, 2 = Normal, 3 = Low, 4 = Unimportant, 5 = Not set).
1042
approxTime         u32   required   Minutes from midnight (up to 24*60).
1043 1 Andreas Smas
startExtra         s64   required   Extra start minutes (pre-time).
1044
stopExtra          s64   required   Extra stop minutes (post-time).
1045 95 Jaroslav Kysela
title              str   optional   Title.
1046 122 Jaroslav Kysela
directory          str   optional   Forced directory name (Added in version 19).
1047 95 Jaroslav Kysela
channel            u32   optional   Channel ID.
1048 117 Jaroslav Kysela
owner              str   optional   Owner of this autorec entry (Added in version 18).
1049
creator            str   optional   Creator of this autorec entry (Added in version 18).
1050 95 Jaroslav Kysela
</pre>
1051 1 Andreas Smas
1052 95 Jaroslav Kysela
h3. autorecEntryUpdate (Added in version 13)
1053
1054
Message fields:
1055
<pre>
1056 117 Jaroslav Kysela
Same as autorecEntryAdd but all fields (except id) are optional.
1057 95 Jaroslav Kysela
</pre>
1058
1059 1 Andreas Smas
h3. autorecEntryDelete (Added in version 13)
1060
1061
Message fields:
1062
<pre>
1063
id                 str   required   Autorec Entry ID (string!)
1064 117 Jaroslav Kysela
</pre>
1065
1066
----
1067
1068 118 Jaroslav Kysela
h3. timerecEntryAdd (Added in version 18)
1069 117 Jaroslav Kysela
1070
A new autorec recording has been created on the server.
1071
1072
Message fields:
1073
<pre>
1074
title              str   required   Title for the recordings.
1075 123 Jaroslav Kysela
directory          str   optional   Forced directory name (Added in version 19).
1076 117 Jaroslav Kysela
enabled            u32   required   Title for the recordings.
1077
name               str   required   Name for this timerec entry.
1078
configName         str   required   DVR Configuration Name / UUID.
1079
channelId          u32   required   Channel ID.
1080
daysOfWeek         u32   optional   Bitmask - Days of week (0x01 = Monday, 0x40 = Sunday, 0x7f = Whole Week, 0 = Not set).
1081
priority           u32   optional   Priority (0 = Important, 1 = High, 2 = Normal, 3 = Low, 4 = Unimportant, 5 = Not set).
1082
start              u32   required   Minutes from midnight (up to 24*60) for the start of the time window (including)
1083
stop               u32   required   Minutes from modnight (up to 24*60) for the end of the time window (including, cross-noon allowed)
1084
retention          u32   optional   Retention in days. 
1085
comment            str   optional   User Comment.
1086
owner              str   optional   Owner of this timerec entry.
1087
creator            str   optional   Creator of this timerec entry.
1088
</pre>
1089
1090
h3. timerecEntryUpdate (Added in version 18)
1091
1092
Message fields:
1093
<pre>
1094
Same as timerecEntryAdd but all fields (except id) are optional.
1095
</pre>
1096
1097
h3. timerecEntryDelete (Added in version 18)
1098
1099
Message fields:
1100
<pre>
1101
id                 str   required   Timerec Entry ID (string!)
1102 95 Jaroslav Kysela
</pre>
1103
1104
----
1105
1106 66 Adam Sutton
h3. eventAdd (Added in version 6)
1107 48 mdd -
1108 66 Adam Sutton
Message fields:
1109
<pre>
1110
eventId            u32   required   Event ID
1111
channelId          u32   required   The channel this event is related to.
1112
start              u64   required   Start time of event, UNIX time.
1113
stop               u64   required   Ending time of event, UNIX time.
1114
title              str   optional   Title of event.
1115
summary            str   optional   Short description of the event (Added in version 6).
1116
description        str   optional   Long description of the event.
1117
serieslinkId       u32   optional   Series Link ID (Added in version 6).
1118
episodeId          u32   optional   Episode ID (Added in version 6).
1119
seasonId           u32   optional   Season ID (Added in version 6).
1120
brandId            u32   optional   Brand ID (Added in version 6).
1121
contentType        u32   optional   DVB content code (Added in version 4, Modified in version 6*).
1122
ageRating          u32   optional   Minimum age rating (Added in version 6).
1123
starRating         u32   optional   Star rating (1-5) (Added in version 6).
1124
firstAired         s64   optional   Original broadcast time, UNIX time (Added in version 6).
1125
seasonNumber       u32   optional   Season number (Added in version 6).
1126
seasonCount        u32   optional   Show season count (Added in version 6).
1127
episodeNumber      u32   optional   Episode number (Added in version 6).
1128
episodeCount       u32   optional   Season episode count (Added in version 6).
1129
partNumber         u32   optional   Multi-part episode part number (Added in version 6).
1130
partCount          u32   optional   Multi-part episode part count (Added in version 6).
1131
episodeOnscreen    str   optional   Textual representation of episode number (Added in version 6).
1132
image              str   optional   URL to a still capture from the episode (Added in version 6).
1133
dvrId              u32   optional   ID of a recording (Added in version 5).
1134
nextEventId        u32   optional   ID of next event on the same channel.
1135
</pre>
1136 48 mdd -
1137 66 Adam Sutton
* *contentType previously had the major DVB category in the bottom 4 bits, 
1138
  however in v6 this has been changed to properly match DVB, so top 4 bits
1139
  as major category and bottom 4 bits has sub-category. Clients requesting
1140
  v5 or lower will get the old output.
1141 48 mdd -
1142 66 Adam Sutton
h3. eventUpdate (Added in version 6)
1143 35 Andreas Smas
1144 58 sbi -
Message fields:
1145
<pre>
1146 66 Adam Sutton
Same as eventAdd but all fields (except eventId) are optional.
1147 35 Andreas Smas
</pre>
1148 58 sbi -
1149 77 John Törnblom
h3. eventDelete (Added in version 6)
1150 35 Andreas Smas
1151 66 Adam Sutton
Message fields:
1152
<pre>
1153
eventId            u32   required   Event ID
1154
</pre>
1155 14 Andreas Smas
1156 66 Adam Sutton
---
1157 14 Andreas Smas
1158 66 Adam Sutton
h3. initialSyncCompleted (Added in version 2)
1159 14 Andreas Smas
1160 66 Adam Sutton
Sent after all the initial metadata has been sent when session has been set to async mode.
1161 38 Andreas Smas
1162
Message fields:
1163 14 Andreas Smas
<pre>
1164
</pre>
1165
1166
----
1167
1168
h3. subscriptionStart
1169 53 Andreas Smas
1170 66 Adam Sutton
Asynchronous message output when a new subscription is successfully started.
1171 14 Andreas Smas
1172
Message fields:
1173 1 Andreas Smas
<pre>
1174 66 Adam Sutton
subscriptionId     u32   required   Subscription ID.
1175
streams            msg[] required   Array of messages with stream information
1176
sourceinfo         msg   optional   Source information.
1177
</pre>
1178 37 Andreas Smas
1179 66 Adam Sutton
Stream message fields:
1180
<pre>
1181
index              u32   required   Index for this stream
1182
type               str   required   Type of stream
1183 113 Jaroslav Kysela
meta               bin   optional   Codec metadata (private data, libav - extradata) (Added in version 17)
1184 66 Adam Sutton
language           str   optional   Language for stream
1185
Video components only:
1186
width              u32   optional   Width of video in pixels
1187
height             u32   optional   Height of video in pixels
1188 68 Andreas Smas
aspect_num         u32   optional   Aspect ratio numerator (Added in version 5) *Can be incorrect and should not be relied upon*
1189
aspect_den         u32   optional   Aspect ratio denonminator (Added in version 5) *Can be incorrect and should not be relied upon*
1190 66 Adam Sutton
Audio components only:
1191 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)
1192 66 Adam Sutton
channels           u32   optional   Number of audio channels (Added in version 5)
1193
rate               u32   optional   Audio bitrate (Added in version 5)
1194
Subtitle components only:
1195
composition_id     u32   optional   ??? (Added in version 5)
1196
ancillary_id       u32   optional   ??? (Added in version 5)
1197
</pre>
1198 2 Andreas Smas
1199 66 Adam Sutton
Sourceinfo message fields:
1200
<pre>
1201
adapter            str   optional   Adapter name
1202
mux                str   optional   Transponder name
1203
network            str   optional   Network name
1204
provider           str   optional   ???
1205
service            str   optional   Service name
1206
</pre>
1207 15 Andreas Smas
1208 66 Adam Sutton
Video Stream types:
1209 1 Andreas Smas
<pre>
1210 79 Jaroslav Kysela
MPEG2VIDEO                    MPEG2 video, meta field is present (configuration blocks)
1211
H264                          H264 video, meta field is present (configuration blocks)
1212
HEVC                          HEVC video, meta field is present (configuration blocks)
1213 66 Adam Sutton
</pre>
1214 15 Andreas Smas
1215 1 Andreas Smas
Audio Stream types:
1216
<pre>
1217 66 Adam Sutton
MPEG2AUDIO                    MPEG2 audio (MP2)
1218
AC3                           AC3 audio
1219 79 Jaroslav Kysela
AAC                           ADTS framed AAC (one AAC packet per ADTS frame), meta field is present (MPEG4 config)
1220 66 Adam Sutton
EAC3                          Enhanced AC3 audio
1221 79 Jaroslav Kysela
VORBIS                        Vorbis audio, meta field is present with the main vorbis header
1222 16 Andreas Smas
</pre>
1223
1224 66 Adam Sutton
Subtitle Stream types:
1225
<pre>
1226
TELETEXT                      ???
1227
DVBSUB                        ???
1228
</pre>
1229 55 Lars Op den Kamp -
1230 112 Jaroslav Kysela
h3. subscriptionGrace
1231
1232
Notifies client about the grace timeout (timeout for stream activation). It can be issues multiple times.
1233
For example a configuration with satellite rotors requires more than 120 seconds to tune, so users
1234
should be notified..
1235
1236
Message fields:
1237
<pre>
1238
subscriptionId     u32   required   Subscription ID.
1239
graceTimeout       u32   required   Grace timeout in seconds.
1240
</pre>
1241
1242 55 Lars Op den Kamp -
h3. subscriptionStop
1243
1244 66 Adam Sutton
A subscription has been stopped.
1245 55 Lars Op den Kamp -
1246
Message fields:
1247
<pre>
1248 66 Adam Sutton
subscriptionId     u32   required   Subscription ID.
1249 1 Andreas Smas
status             str   optional   Error message if subscription stopped unexpectedly.
1250
</pre>
1251
1252 73 Adam Sutton
h3. subscriptionSkip (Added version 9)
1253
1254
A subscription has been skipped.
1255
1256
Message fields:
1257
<pre>
1258
subscriptionId     u32   required   Subscription ID.
1259
error              u32   optional   The last skip command caused an error.
1260
absolute           u32   optional   Indicates the output is absolute (Note: should always be 1 at the moment)
1261
time               u64   optional   The time the subscription has skipped to.
1262
size               u64   optional   The position in the file we've skipped to (Note: not currently used).
1263
</pre>
1264
1265
h3. subscriptionSpeed (Added version 9)
1266
1267
A subscription's playback speed has changed.
1268
1269
This can happen even without a speed request, should playback reach either end of the buffer.
1270
1271
Message fields:
1272
<pre>
1273
subscriptionId     u32   required   Subscription ID.
1274
speed              u32   required   The new speed of the subscription
1275
</pre>
1276
1277 55 Lars Op den Kamp -
h3. subscriptionStatus
1278
1279 66 Adam Sutton
Subscription status update.
1280 58 sbi -
1281
Message fields:
1282
<pre>
1283 66 Adam Sutton
subscriptionId     u32   required   Subscription ID.
1284
status             str   optional   English clear text of error status. Absence of this field means that the status is OK. 
1285 16 Andreas Smas
</pre>
1286 58 sbi -
1287 16 Andreas Smas
h3. queueStatus
1288
1289 1 Andreas Smas
The queueStatus message is sent every second during normal data delivery.
1290 60 John Törnblom
1291
The transmit scheduler have different drop thresholds for different frame types.
1292 66 Adam Sutton
1293 1 Andreas Smas
If congestion occurs it will favor dropping B-frames before P-frames before I-frames.
1294
All audio is recognized as I-frames. 
1295 58 sbi -
1296 1 Andreas Smas
Message fields:
1297
<pre>
1298 66 Adam Sutton
subscriptionId     u32   required   Subscription ID.
1299
packets            u32   required   Number of data packets in queue.
1300
bytes              u32   required   Number of bytes in queue.
1301
delay              u32   optional   Estimated delay of queue (in µs).
1302 1 Andreas Smas
Bdrops             u32   required   Number of B-frames dropped
1303 66 Adam Sutton
Pdrops             u32   required   Number of P-frames dropped
1304
Idrops             u32   required   Number of I-frames dropped
1305 73 Adam Sutton
delay              s64   required   Delta between first and last DTS (Added in version 9)
1306 1 Andreas Smas
</pre>
1307
1308
h3. signalStatus
1309
1310
The signalStatus message is sent every second during normal data delivery.
1311
1312
The optional fields may not have been implemented or may not be supported by the active adapter.
1313
1314
Message fields:
1315
<pre>
1316 66 Adam Sutton
subscriptionId     u32   required   Subscription ID.
1317
feStatus           str   required   Frontend status.
1318
feSNR              u32   optional   Signal to noise ratio.
1319 1 Andreas Smas
feSignal           u32   optional   Signal status percentage.
1320
feBER              u32   optional   Bit error rate.
1321
feUNC              u32   optional   Uncorrected blocks.
1322 73 Adam Sutton
</pre>
1323
1324
h3. timeshiftStatus
1325
1326
Provide status every second about the timeshift buffer.
1327
1328
Message fields:
1329
<pre>
1330
subscriptionId     u32   required   Subscription ID.
1331
full               u32   required   Indicates whether the buffer is full
1332
shift              s64   required   Current position relative to live
1333
start              s64   optional   PTS of the first frame in the buffer
1334
end                s64   optional   PTS of the last frame in the buffer
1335 1 Andreas Smas
</pre>
1336
1337
h3. muxpkt
1338
1339
Streaming data.
1340
1341
Message fields:
1342
<pre>
1343 66 Adam Sutton
subscriptionId     u32   required   Subscription ID.
1344
frametype          u32   required   Type of frame as ASCII value: 'I', 'P', 'B'
1345
stream             u32   required   Stream index. Corresponds to the streams reported in the subscriptionStart message.
1346
dts                s64   optional   Decode Time Stamp in µs.
1347
pts                s64   optional   Presentation Time Stamp in µs.
1348
duration           u32   required   Duration of frame in µs.
1349
payload            bin   required   Actual frame data.
1350 1 Andreas Smas
</pre>