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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
27 #define MPTYPE_VIDEO 0x00
28 #define MPTYPE_MPEG_AUDIO 0x01
29 #define MPTYPE_AC3 0x02
30 #define MPTYPE_AC3_PRE13 0x03 //old vdr recording compatmode
34 ULONG pos_buffer; //position in stream buffer
35 ULONG length; //length of the packet
36 // The fields below are not needed by the MVP
39 ULLONG recording_byte_pos; //position in recording
41 long long presentation_time;/* in 100 ns units*/
48 typedef list<MediaPacket> MediaPacketList;
54 virtual ~DrainTarget();
56 virtual long long SetStartOffset(long long curreftime, bool *rsync)=0;
57 virtual void ResetTimeOffsets()=0;
59 // The following two functions are used by the Stream
60 // to deliver media packets to the front end (DrainTarget).
62 // First, the Stream calls PrepareMediaSample, which gives the front end
63 // read-only access to the Stream's MediaPacketList. PrepareMediaSample should
64 // examine the list to determine how much it wishes to consume, and
65 // should copy any data it requires from the MediaPacket objects into
67 // This function call takes place under a mutex lock to ensure integrity
68 // of the list structure. It should be fast and must not contain any
69 // cancellation points, such as I/O calls for logging.
71 // Second, the Stream releases the mutex and calls DeliverMediaSample.
72 // This function delivers data from the Stream buffer to the presentation
73 // device and returns information to the Stream regarding how many MediaPackets
74 // were consumed. Any data copied from the MediaPackets objects during
75 // PrepareMediaSample is guaranteed by the Stream still to be valid
76 // during the following DeliverMediaSample call.
78 // samplepos is equal to the number of bytes from the first MediaPacket
79 // in the list that have already been consumed in a previous call.
80 virtual void PrepareMediaSample(const MediaPacketList&, UINT samplepos)=0;
82 // The Stream guarantees that the value of *samplepos passed to
83 // DeliverMediaSample will be equal to the value of samplepos passed to
84 // PrepareMediaSample in the previous call.
85 // This function should consume data from the buffer according to the
86 // decisions made in PrepareMediaSample. Its return value and *samplepos
87 // tell the Stream how much data it consumed.
88 // If DeliverMediaSample returns X, the Stream will remove packets 0 to X-1
89 // (inclusive) from the list before the next call.
90 // DeliverMediaSample must also set *samplepos equal to the number of bytes
91 // processed from packet X (usually zero).
92 virtual UINT DeliverMediaSample(const UCHAR* buffer, UINT *samplepos)=0;