nulloutput.c
资源名称:tcpmp.rar [点击查看]
上传用户:wstnjxml
上传日期:2014-04-03
资源大小:7248k
文件大小:4k
源码类别:
Windows CE
开发平台:
C/C++
- /*****************************************************************************
- *
- * This program is free software ; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- * $Id: nulloutput.c 543 2006-01-07 22:06:24Z picard $
- *
- * The Core Pocket Media Player
- * Copyright (c) 2004-2005 Gabor Kovacs
- *
- ****************************************************************************/
- #include "common.h"
- typedef struct nulloutput
- {
- node Node;
- pin Pin;
- packetformat Format;
- int Total;
- int Dropped;
- } nulloutput;
- static int Process(nulloutput* p, const packet* Packet, const flowstate* State)
- {
- if (Packet)
- {
- if (State->CurrTime >= 0 && Packet->RefTime > State->CurrTime + SHOWAHEAD)
- return ERR_BUFFER_FULL;
- if (State->CurrTime != TIME_RESEND)
- {
- if (p->Format.Type == PACKET_AUDIO)
- p->Total += Packet->Length;
- else
- ++p->Total;
- }
- }
- else
- if (State->DropLevel)
- ++p->Dropped;
- return ERR_NONE;
- }
- static int UpdateInput(nulloutput* p)
- {
- p->Total = 0;
- p->Dropped = 0;
- if ((p->Format.Type == PACKET_SUBTITLE) ||
- (p->Format.Type == PACKET_VIDEO && (p->Node.Class != NULLVIDEO_ID || Compressed(&p->Format.Format.Video.Pixel))) ||
- (p->Format.Type == PACKET_AUDIO && (p->Node.Class != NULLAUDIO_ID || p->Format.Format.Audio.Format != AUDIOFMT_PCM)))
- {
- PacketFormatClear(&p->Format);
- return ERR_INVALID_DATA;
- }
- return ERR_NONE;
- }
- static int Get(nulloutput* p, int No, void* Data, int Size)
- {
- int Result = ERR_INVALID_PARAM;
- switch (No)
- {
- case OUT_INPUT: GETVALUE(p->Pin,pin); break;
- case OUT_OUTPUT|PIN_FORMAT:
- case OUT_INPUT|PIN_FORMAT: GETVALUE(p->Format,packetformat); break;
- case OUT_INPUT|PIN_PROCESS: GETVALUE((packetprocess)Process,packetprocess); break;
- case OUT_TOTAL: GETVALUE(p->Total,int); break;
- case OUT_DROPPED: GETVALUE(p->Dropped,int); break;
- case VOUT_CAPS: GETVALUE(0,int); break;
- }
- return Result;
- }
- static int Set(nulloutput* p, int No, const void* Data, int Size)
- {
- int Result = ERR_INVALID_PARAM;
- switch (No)
- {
- case OUT_INPUT: SETVALUE(p->Pin,pin,ERR_NONE); break;
- case OUT_INPUT|PIN_FORMAT: SETPACKETFORMAT(p->Format,packetformat,UpdateInput(p)); break;
- case OUT_TOTAL: SETVALUE(p->Total,int,ERR_NONE); break;
- case OUT_DROPPED: SETVALUE(p->Dropped,int,ERR_NONE); break;
- }
- return Result;
- }
- static int Create(nulloutput* p)
- {
- p->Node.Get = (nodeget)Get;
- p->Node.Set = (nodeset)Set;
- return ERR_NONE;
- }
- static const nodedef NullAudio =
- {
- sizeof(nulloutput),
- NULLAUDIO_ID,
- AOUT_CLASS,
- PRI_MINIMUM,
- (nodecreate)Create,
- NULL,
- };
- static const nodedef NullVideo =
- {
- sizeof(nulloutput),
- NULLVIDEO_ID,
- VOUT_CLASS,
- PRI_MINIMUM,
- (nodecreate)Create,
- NULL,
- };
- void NullOutput_Init()
- {
- NodeRegisterClass(&NullVideo);
- NodeRegisterClass(&NullAudio);
- }
- void NullOutput_Done()
- {
- NodeUnRegisterClass(NULLAUDIO_ID);
- NodeUnRegisterClass(NULLVIDEO_ID);
- }