2 Copyright 2004-2005 Chris Tallon
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4 This file is part of VOMP.
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6 VOMP is free software; you can redistribute it and/or modify
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7 it under the terms of the GNU General Public License as published by
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8 the Free Software Foundation; either version 2 of the License, or
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9 (at your option) any later version.
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11 VOMP is distributed in the hope that it will be useful,
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12 but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 GNU General Public License for more details.
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16 You should have received a copy of the GNU General Public License
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17 along with VOMP; if not, write to the Free Software
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18 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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21 #ifndef DRAINTARGET_H
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22 #define DRAINTARGET_H
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24 #include "defines.h"
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27 #define MPTYPE_VIDEO_MPEG2 0x00
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28 #define MPTYPE_MPEG_AUDIO 0x01
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29 #define MPTYPE_AC3 0x02
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30 #define MPTYPE_AC3_PRE13 0x03 //old vdr recording compatmode
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31 #define MPTYPE_MPEG_AUDIO_LAYER3 0x04 //for media mp3 playback
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32 #define MPTYPE_TELETEXT 0x05 //for EBU VBI teletext
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33 #define MPTYPE_VIDEO_H264 0x06
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39 ULONG pos_buffer; //position in stream buffer
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40 ULONG length; //length of the packet
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41 // The fields below are not needed by the MVP
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47 #ifndef VOMP_PLATTFORM_MVP
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48 long long presentation_time;/* native time of plattform, in 100 ns units(Windows)*/
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53 using namespace std;
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54 typedef list<MediaPacket> MediaPacketList;
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64 virtual ~DrainTarget(){
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68 virtual long long SetStartOffset(long long curreftime, bool *rsync)=0;
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69 virtual void ResetTimeOffsets()=0;
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71 virtual bool dtsTimefix(){return false;} //determines if the draintargets needs a mixure of pts and dts or not
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73 // The following two functions are used by the Stream
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74 // to deliver media packets to the front end (DrainTarget).
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76 // First, the Stream calls PrepareMediaSample, which gives the front end
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77 // read-only access to the Stream's MediaPacketList. PrepareMediaSample should
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78 // examine the list to determine how much it wishes to consume, and
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79 // should copy any data it requires from the MediaPacket objects into
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81 // This function call takes place under a mutex lock to ensure integrity
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82 // of the list structure. It should be fast and must not contain any
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83 // cancellation points, such as I/O calls for logging.
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85 // Second, the Stream releases the mutex and calls DeliverMediaSample.
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86 // This function delivers data from the Stream buffer to the presentation
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87 // device and returns information to the Stream regarding how many MediaPackets
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88 // were consumed. Any data copied from the MediaPackets objects during
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89 // PrepareMediaSample is guaranteed by the Stream still to be valid
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90 // during the following DeliverMediaSample call.
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92 // samplepos is equal to the number of bytes from the first MediaPacket
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93 // in the list that have already been consumed in a previous call.
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94 virtual void PrepareMediaSample(const MediaPacketList&, UINT samplepos)=0;
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96 // The Stream guarantees that the value of *samplepos passed to
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97 // DeliverMediaSample will be equal to the value of samplepos passed to
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98 // PrepareMediaSample in the previous call.
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99 // This function should consume data from the buffer according to the
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100 // decisions made in PrepareMediaSample. Its return value and *samplepos
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101 // tell the Stream how much data it consumed.
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102 // If DeliverMediaSample returns X, the Stream will remove packets 0 to X-1
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103 // (inclusive) from the list before the next call.
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104 // DeliverMediaSample must also set *samplepos equal to the number of bytes
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105 // processed from packet X (usually zero).
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106 // It is allowed, that the draintarget modifies the part of the buffer, which belongs
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107 // to the mediapackets it is processing.
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108 virtual UINT DeliverMediaSample(UCHAR* buffer, UINT *samplepos)=0;
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109 // The drain target might advice the feeder about free buffers with threadSignal
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