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