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505 lines
23 KiB
C++
505 lines
23 KiB
C++
/*
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* device.h: The basic device interface
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*
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* See the main source file 'vdr.c' for copyright information and
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* how to reach the author.
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*
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* $Id: device.h 1.48 2004/12/24 14:57:24 kls Exp $
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*/
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#ifndef __DEVICE_H
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#define __DEVICE_H
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#include "ci.h"
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#include "eit.h"
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#include "filter.h"
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#include "nit.h"
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#include "pat.h"
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#include "ringbuffer.h"
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#include "sdt.h"
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#include "sections.h"
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#include "thread.h"
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#include "tools.h"
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#define MAXDEVICES 16 // the maximum number of devices in the system
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#define MAXPIDHANDLES 16 // the maximum number of different PIDs per device
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#define MAXRECEIVERS 16 // the maximum number of receivers per device
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#define MAXVOLUME 255
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#define VOLUMEDELTA 5 // used to increase/decrease the volume
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#define TS_SIZE 188
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#define TS_SYNC_BYTE 0x47
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#define PID_MASK_HI 0x1F
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enum eSetChannelResult { scrOk, scrNotAvailable, scrNoTransfer, scrFailed };
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enum ePlayMode { pmNone, // audio/video from decoder
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pmAudioVideo, // audio/video from player
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pmAudioOnly, // audio only from player, video from decoder
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pmAudioOnlyBlack, // audio only from player, no video (black screen)
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pmVideoOnly, // video only from player, audio from decoder
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pmExtern_THIS_SHOULD_BE_AVOIDED
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// external player (e.g. MPlayer), release the device
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// WARNING: USE THIS MODE ONLY AS A LAST RESORT, IF YOU
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// ABSOLUTELY, POSITIVELY CAN'T IMPLEMENT YOUR PLAYER
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// THE WAY IT IS SUPPOSED TO WORK. FORCING THE DEVICE
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// TO RELEASE ITS FILES HANDLES (OR WHATEVER RESOURCES
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// IT MAY USE) TO ALLOW AN EXTERNAL PLAYER TO ACCESS
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// THEM MEANS THAT SUCH A PLAYER WILL NEED TO HAVE
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// DETAILED KNOWLEDGE ABOUT THE INTERNALS OF THE DEVICE
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// IN USE. AS A CONSEQUENCE, YOUR PLAYER MAY NOT WORK
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// IF A PARTICULAR VDR INSTALLATION USES A DEVICE NOT
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// KNOWN TO YOUR PLAYER.
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};
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enum eVideoSystem { vsPAL,
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vsNTSC
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};
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enum eTrackType { ttNone,
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ttAudio,
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ttAudioFirst = ttAudio,
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ttAudioLast = ttAudioFirst + 31/*XXX MAXAPIDS - 1*/,
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ttDolby,
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ttDolbyFirst = ttDolby,
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ttDolbyLast = ttDolbyFirst + 31/*XXX MAXAPIDS - 1*/,
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/* future...
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ttSubtitle,
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ttSubtitleFirst = ttSubtitle,
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ttSubtitleLast = ttSubtitleFirst + 31,
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*/
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ttMaxTrackTypes
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};
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#define IS_AUDIO_TRACK(t) (ttAudioFirst <= (t) && (t) <= ttAudioLast)
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#define IS_DOLBY_TRACK(t) (ttDolbyFirst <= (t) && (t) <= ttDolbyLast)
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struct tTrackId {
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uint16_t id; // The PES packet id or the PID.
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char language[8]; // something like either "eng" or "deu/eng"
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// for future use:
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uint32_t flags; // Used to further identify the actual track.
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};
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class cChannel;
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class cPlayer;
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class cReceiver;
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class cSpuDecoder;
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class cPesAssembler;
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/// The cDevice class is the base from which actual devices can be derived.
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class cDevice : public cThread {
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private:
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static int numDevices;
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static int useDevice;
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static cDevice *device[MAXDEVICES];
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static cDevice *primaryDevice;
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public:
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static int NumDevices(void) { return numDevices; }
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///< Returns the total number of devices.
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static void SetUseDevice(int n);
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///< Sets the 'useDevice' flag of the given device.
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///< If this function is not called before initializing, all devices
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///< will be used.
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static bool UseDevice(int n) { return useDevice == 0 || (useDevice & (1 << n)) != 0; }
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///< Tells whether the device with the given card index shall be used in
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///< this instance of VDR.
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static bool SetPrimaryDevice(int n);
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///< Sets the primary device to 'n'.
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///< \param n must be in the range 1...numDevices.
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///< \return true if this was possible.
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static cDevice *PrimaryDevice(void) { return primaryDevice; }
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///< Returns the primary device.
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static cDevice *ActualDevice(void);
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///< Returns the actual receiving device in case of Transfer Mode, or the
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///< primary device otherwise.
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static cDevice *GetDevice(int Index);
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///< Gets the device with the given Index.
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///< \param Index must be in the range 0..numDevices-1.
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///< \return A pointer to the device, or NULL if the Index was invalid.
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static cDevice *GetDevice(const cChannel *Channel, int Priority = -1, bool *NeedsDetachReceivers = NULL);
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///< Returns a device that is able to receive the given Channel at the
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///< given Priority.
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///< See ProvidesChannel() for more information on how
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///< priorities are handled, and the meaning of NeedsDetachReceivers.
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static void Shutdown(void);
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///< Closes down all devices.
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///< Must be called at the end of the program.
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private:
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static int nextCardIndex;
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int cardIndex;
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protected:
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cDevice(void);
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virtual ~cDevice();
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static int NextCardIndex(int n = 0);
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///< Calculates the next card index.
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///< Each device in a given machine must have a unique card index, which
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///< will be used to identify the device for assigning Ca parameters and
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///< deciding whether to actually use that device in this particular
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///< instance of VDR. Every time a new cDevice is created, it will be
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///< given the current nextCardIndex, and then nextCardIndex will be
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///< automatically incremented by 1. A derived class can determine whether
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///< a given device shall be used by checking UseDevice(NextCardIndex()).
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///< If a device is skipped, or if there are possible device indexes left
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///< after a derived class has set up all its devices, NextCardIndex(n)
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///< must be called, where n is the number of card indexes to skip.
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virtual void MakePrimaryDevice(bool On);
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///< Informs a device that it will be the primary device. If there is
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///< anything the device needs to set up when it becomes the primary
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///< device (On = true) or to shut down when it no longer is the primary
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///< device (On = false), it should do so in this function.
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public:
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bool IsPrimaryDevice(void) const { return this == primaryDevice; }
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int CardIndex(void) const { return cardIndex; }
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///< Returns the card index of this device (0 ... MAXDEVICES - 1).
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int DeviceNumber(void) const;
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///< Returns the number of this device (0 ... MAXDEVICES - 1).
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virtual int ProvidesCa(const cChannel *Channel) const;//XXX PLUGINS.html!!!
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//XXX describe changed functionality!!!
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///< Checks whether this device provides the given value in its
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///< caCaps. Returns 0 if the value is not provided, 1 if only this
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///< value is provided, and > 1 if this and other values are provided.
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///< If the given value is equal to the number of this device,
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///< 1 is returned. If it is 0 (FTA), 1 plus the number of other values
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///< in caCaps is returned.
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virtual bool HasDecoder(void) const;
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///< Tells whether this device has an MPEG decoder.
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// SPU facilities
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public:
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virtual cSpuDecoder *GetSpuDecoder(void);
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///< Returns a pointer to the device's SPU decoder (or NULL, if this
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///< device doesn't have an SPU decoder).
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// Channel facilities
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protected:
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static int currentChannel;
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public:
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virtual bool ProvidesSource(int Source) const;
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///< Returns true if this device can provide the given source.
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virtual bool ProvidesTransponder(const cChannel *Channel) const;
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///< XXX -> PLUGINS.html!
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virtual bool ProvidesChannel(const cChannel *Channel, int Priority = -1, bool *NeedsDetachReceivers = NULL) const;
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///< Returns true if this device can provide the given channel.
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///< In case the device has cReceivers attached to it or it is the primary
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///< device, Priority is used to decide whether the caller's request can
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///< be honored.
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///< The special Priority value -1 will tell the caller whether this device
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///< is principally able to provide the given Channel, regardless of any
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///< attached cReceivers.
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///< If NeedsDetachReceivers is given, the resulting value in it will tell the
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///< caller whether or not it will have to detach any currently attached
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///< receivers from this device before calling SwitchChannel. Note
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///< that the return value in NeedsDetachReceivers is only meaningful if the
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///< function itself actually returns true.
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///< The default implementation always returns false, so a derived cDevice
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///< class that can provide channels must implement this function.
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bool SwitchChannel(const cChannel *Channel, bool LiveView);
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///< Switches the device to the given Channel, initiating transfer mode
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///< if necessary.
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static bool SwitchChannel(int Direction);
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///< Switches the primary device to the next available channel in the given
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///< Direction (only the sign of Direction is evaluated, positive values
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///< switch to higher channel numbers).
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private:
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eSetChannelResult SetChannel(const cChannel *Channel, bool LiveView);
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///< Sets the device to the given channel (general setup).
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protected:
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virtual bool SetChannelDevice(const cChannel *Channel, bool LiveView);
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///< Sets the device to the given channel (actual physical setup).
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public:
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static int CurrentChannel(void) { return primaryDevice ? currentChannel : 0; }
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///< Returns the number of the current channel on the primary device.
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virtual bool HasLock(int TimeoutMs = 0);//XXX PLUGINS.html
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///< Returns true if the device has a lock on the requested transponder.
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///< Default is true, a specific device implementation may return false
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///< to indicate that it is not ready yet.
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///< If TimeoutMs is not zero, waits for the given number of milliseconds
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///< before returning false.
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virtual bool HasProgramme(void);
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///< Returns true if the device is currently showing any programme to
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///< the user, either through replaying or live.
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// PID handle facilities
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private:
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bool active;
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virtual void Action(void);
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protected:
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enum ePidType { ptAudio, ptVideo, ptPcr, ptTeletext, ptDolby, ptOther };
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class cPidHandle {
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public:
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int pid;
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int handle;
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int used;
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cPidHandle(void) { pid = used = 0; handle = -1; }
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};
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cPidHandle pidHandles[MAXPIDHANDLES];
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bool HasPid(int Pid) const;
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///< Returns true if this device is currently receiving the given PID.
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bool AddPid(int Pid, ePidType PidType = ptOther);
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///< Adds a PID to the set of PIDs this device shall receive.
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void DelPid(int Pid, ePidType PidType = ptOther);
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///< Deletes a PID from the set of PIDs this device shall receive.
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virtual bool SetPid(cPidHandle *Handle, int Type, bool On);
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///< Does the actual PID setting on this device.
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///< On indicates whether the PID shall be added or deleted.
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///< Handle->handle can be used by the device to store information it
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///< needs to receive this PID (for instance a file handle).
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///< Handle->used indicated how many receivers are using this PID.
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///< Type indicates some special types of PIDs, which the device may
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///< need to set in a specific way.
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// Section filter facilities
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private:
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cSectionHandler *sectionHandler;
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cEitFilter *eitFilter;
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cPatFilter *patFilter;
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cSdtFilter *sdtFilter;
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cNitFilter *nitFilter;
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protected:
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void StartSectionHandler(void);
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///< A derived device that provides section data must call
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///< this function to actually set up the section handler.
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public:
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virtual int OpenFilter(u_short Pid, u_char Tid, u_char Mask);
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///< Opens a file handle for the given filter data.
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///< A derived device that provides section data must
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///< implement this function.
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void AttachFilter(cFilter *Filter);
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///< Attaches the given filter to this device.
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void Detach(cFilter *Filter);
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///< Detaches the given filter from this device.
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// Common Interface facilities:
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protected:
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cCiHandler *ciHandler;
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public:
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cCiHandler *CiHandler(void) { return ciHandler; }
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// Image Grab facilities
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public:
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virtual bool GrabImage(const char *FileName, bool Jpeg = true, int Quality = -1, int SizeX = -1, int SizeY = -1);
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///< Capture a single frame as an image.
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///< Grabs the currently visible screen image into the given file, with the
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///< given parameters.
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///< \param FileName The name of the file to write. Should include the proper extension.
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///< \param Jpeg If true will write a JPEG file. Otherwise a PNM file will be written.
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///< \param Quality The compression factor for JPEG. 1 will create a very blocky
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///< and small image, 70..80 will yield reasonable quality images while keeping the
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///< image file size around 50 KB for a full frame. The default will create a big
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///< but very high quality image.
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///< \param SizeX The number of horizontal pixels in the frame (default is the current screen width).
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///< \param SizeY The number of vertical pixels in the frame (default is the current screen height).
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///< \return True if all went well. */
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// Video format facilities
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public:
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virtual void SetVideoFormat(bool VideoFormat16_9);
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///< Sets the output video format to either 16:9 or 4:3 (only useful
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///< if this device has an MPEG decoder).
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virtual eVideoSystem GetVideoSystem(void);
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///< Returns the video system of the currently displayed material
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///< (default is PAL).
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// Track facilities
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private:
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tTrackId availableTracks[ttMaxTrackTypes];
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eTrackType currentAudioTrack;
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protected:
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virtual void SetAudioTrackDevice(eTrackType Type);
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///< Sets the current audio track to the given value.
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public:
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void ClrAvailableTracks(void);
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bool SetAvailableTrack(eTrackType Type, int Index, uint16_t Id, const char *Language = NULL, uint32_t Flags = 0);
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///< Sets the track of the given Type and Index to the given values.
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///< Type must be one of the basic eTrackType values, like ttAudio or ttDolby.
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///< Index tells which track of the given basic type is meant.
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///< \return Returns true if the track was set correctly, false otherwise.
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const tTrackId *GetTrack(eTrackType Type);
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///< Returns a pointer to the given track id, or NULL if Type is not
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///< less than ttMaxTrackTypes.
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int NumAudioTracks(void) const;
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///< Returns the number of audio tracks that are currently available.
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///< This is just for information, to quickly find out whether there
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///< is more than one audio track.
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eTrackType GetCurrentAudioTrack(void) { return currentAudioTrack; }
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bool SetCurrentAudioTrack(eTrackType Type);
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///< Sets the current audio track to the given Type.
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///< \return Returns true if Type is a valid audio track, false otherwise.
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bool IncCurrentAudioTrack(void);
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///< Sets the current audio track to the next available track (wraps to
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///< to the first one if necessary).
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///< \return Returns true if the audio track has been changed, false otherwise.
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// Audio facilities
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private:
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bool mute;
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int volume;
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protected:
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virtual void SetVolumeDevice(int Volume);
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///< Sets the audio volume on this device (Volume = 0...255).
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virtual void SetDigitalAudioDevice(bool On) {}
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///< Tells the actual device that digital audio output shall be switched
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///< on or off.
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public:
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bool IsMute(void) const { return mute; }
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bool ToggleMute(void);
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///< Turns the volume off or on and returns the new mute state.
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void SetVolume(int Volume, bool Absolute = false);
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///< Sets the volume to the given value, either absolutely or relative to
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///< the current volume.
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static int CurrentVolume(void) { return primaryDevice ? primaryDevice->volume : 0; }//XXX???
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// Player facilities
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private:
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cPlayer *player;
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cPesAssembler *pesAssembler;
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protected:
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virtual bool CanReplay(void) const;
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///< Returns true if this device can currently start a replay session.
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virtual bool SetPlayMode(ePlayMode PlayMode);
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///< Sets the device into the given play mode.
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///< \return true if the operation was successful.
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virtual int PlayVideo(const uchar *Data, int Length);
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///< Plays the given data block as video.
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///< Data points to exactly one complete PES packet of the given Length.
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///< PlayVideo() shall process the packet either as a whole (returning
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///< Length) or not at all (returning 0 or -1 and setting 'errno' to EAGAIN).
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///< \return Returns the number of bytes actually taken from Data, or -1
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///< in case of an error.
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virtual int PlayAudio(const uchar *Data, int Length);
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///< Plays the given data block as audio.
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///< Data points to exactly one complete PES packet of the given Length.
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///< PlayAudio() shall process the packet either as a whole (returning
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///< Length) or not at all (returning 0 or -1 and setting 'errno' to EAGAIN).
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///< \return Returns the number of bytes actually taken from Data, or -1
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///< in case of an error.
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virtual int PlayPesPacket(const uchar *Data, int Length, bool VideoOnly = false);
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///< Plays the single PES packet in Data with the given Length.
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///< If VideoOnly is true, only the video will be displayed,
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///< which is necessary for trick modes like 'fast forward'.
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///< Data must point to one single, complete PES packet.
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public:
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virtual int64_t GetSTC(void);
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///< Gets the current System Time Counter, which can be used to
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///< synchronize audio and video. If this device is unable to
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///< provide the STC, -1 will be returned.
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virtual void TrickSpeed(int Speed);
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///< Sets the device into a mode where replay is done slower.
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///< Every single frame shall then be displayed the given number of
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///< times.
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virtual void Clear(void);
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///< Clears all video and audio data from the device.
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///< A derived class must call the base class function to make sure
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///< all registered cAudio objects are notified.
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virtual void Play(void);
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///< Sets the device into play mode (after a previous trick
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///< mode).
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virtual void Freeze(void);
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///< Puts the device into "freeze frame" mode.
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virtual void Mute(void);
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///< Turns off audio while replaying.
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///< A derived class must call the base class function to make sure
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///< all registered cAudio objects are notified.
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virtual void StillPicture(const uchar *Data, int Length);
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///< Displays the given I-frame as a still picture.
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virtual bool Poll(cPoller &Poller, int TimeoutMs = 0);
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///< Returns true if the device itself or any of the file handles in
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///< Poller is ready for further action.
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///< If TimeoutMs is not zero, the device will wait up to the given number
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///< of milleseconds before returning in case there is no immediate
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///< need for data.
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virtual bool Flush(int TimeoutMs = 0);
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///< Returns true if the device's output buffers are empty, i. e. any
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///< data which was bufferd so far has been processed.
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///< If TimeoutMs is not zero, the device will wait up to the given
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///< number of milliseconds before returning in case there is still
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///< data in the buffers..
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virtual int PlayPes(const uchar *Data, int Length, bool VideoOnly = false);
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///< Plays all valid PES packets in Data with the given Length.
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///< If Data is NULL any leftover data from a previous call will be
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///< discarded. If VideoOnly is true, only the video will be displayed,
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///< which is necessary for trick modes like 'fast forward'.
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///< Data should point to a sequence of complete PES packets. If the
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///< last packet in Data is not complete, it will be copied and combined
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///< to a complete packet with data from the next call to PlayPes().
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///< That way any functions called from within PlayPes() will be
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///< guaranteed to always receive complete PES packets.
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bool Replaying(void) const;
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///< Returns true if we are currently replaying.
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|
void StopReplay(void);
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|
///< Stops the current replay session (if any).
|
|
bool AttachPlayer(cPlayer *Player);
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|
///< Attaches the given player to this device.
|
|
void Detach(cPlayer *Player);
|
|
///< Detaches the given player from this device.
|
|
|
|
// Receiver facilities
|
|
|
|
private:
|
|
cMutex mutexReceiver;
|
|
cReceiver *receiver[MAXRECEIVERS];
|
|
int CanShift(int Ca, int Priority, int UsedCards = 0) const;
|
|
protected:
|
|
int Priority(void) const;
|
|
///< Returns the priority of the current receiving session (0..MAXPRIORITY),
|
|
///< or -1 if no receiver is currently active. The primary device will
|
|
///< always return at least Setup.PrimaryLimit-1.
|
|
virtual bool OpenDvr(void);
|
|
///< Opens the DVR of this device and prepares it to deliver a Transport
|
|
///< Stream for use in a cReceiver.
|
|
virtual void CloseDvr(void);
|
|
///< Shuts down the DVR.
|
|
virtual bool GetTSPacket(uchar *&Data);
|
|
///< Gets exactly one TS packet from the DVR of this device and returns
|
|
///< a pointer to it in Data. Only the first 188 bytes (TS_SIZE) Data
|
|
///< points to are valid and may be accessed. If there is currently no
|
|
///< new data available, Data will be set to NULL. The function returns
|
|
///< false in case of a non recoverable error, otherwise it returns true,
|
|
///< even if Data is NULL.
|
|
public:
|
|
int Ca(void) const;
|
|
///< Returns the ca of the current receiving session(s).
|
|
bool Receiving(bool CheckAny = false) const;
|
|
///< Returns true if we are currently receiving.
|
|
bool AttachReceiver(cReceiver *Receiver);
|
|
///< Attaches the given receiver to this device.
|
|
void Detach(cReceiver *Receiver);
|
|
///< Detaches the given receiver from this device.
|
|
};
|
|
|
|
/// Derived cDevice classes that can receive channels will have to provide
|
|
/// Transport Stream (TS) packets one at a time. cTSBuffer implements a
|
|
/// simple buffer that allows the device to read a larger amount of data
|
|
/// from the driver with each call to Read(), thus avoiding the overhead
|
|
/// of getting each TS packet separately from the driver. It also makes
|
|
/// sure the returned data points to a TS packet and automatically
|
|
/// re-synchronizes after broken packets.
|
|
|
|
class cTSBuffer : public cThread {
|
|
private:
|
|
int f;
|
|
int cardIndex;
|
|
bool active;
|
|
bool delivered;
|
|
cRingBufferLinear *ringBuffer;
|
|
virtual void Action(void);
|
|
public:
|
|
cTSBuffer(int File, int Size, int CardIndex);
|
|
~cTSBuffer();
|
|
uchar *Get(void);
|
|
};
|
|
|
|
#endif //__DEVICE_H
|