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/***************************************************************************
* stillimage.c
* (C) Copyright 2004 <vdr04-at-deltab.de>
* Created: Thu Aug 5 2004
*
* parts of the code (c) Peter Seyringer
* (c) Marcel Wiesweg
****************************************************************************/
/*
* 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 Library 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.
*/
#include <string.h>
#include <unistd.h>
#include "stillimage.h"
#include "stillimage-player.h"
cStillImage::cStillImage(cStillImagePlayer *pl)
{
m_bThreadRun=false;
m_bEncodeRequired = false;
player=pl;
}
cStillImage::~cStillImage()
{
}
bool cStillImage::Init()
{
return Start();
}
void cStillImage::Stop()
{
if (!m_bThreadRun)
return;
m_bThreadRun=false;
Cancel(3);
}
void cStillImage::Action(void)
{
m_bThreadRun=true;
bool bMPEGValid = false;
bool bQueueEmpty = false;
bool bFreeze = true;
unsigned int nFrame = 0,nFrameOff=0;
int nMircoSekWait;
while (m_bThreadRun) {
nMircoSekWait = 10000;
bQueueEmpty = player->Worker(false);
if(!bQueueEmpty)
{
if(!bFreeze)
{
player->DeviceFreeze();
bFreeze = true;
}
player->Worker(true);
}
if(m_bEncodeRequired
&& bQueueEmpty)
{
//convert data to MPEG
Lock();
bMPEGValid = Encode();
Unlock();
if (!m_bThreadRun)
break;
m_bEncodeRequired = false;
nFrame = 0;
nFrameOff=0;
if(bFreeze)
{
player->DevicePlay();
bFreeze = false;
}
}
if(bMPEGValid
&& bQueueEmpty)
{
/* Methode A ************************************************************/
/*timeval timenow,diff,timestart;
gettimeofday(×tart, 0);
for (int i=1;i<=25 && player->active;i++) {
gettimeofday(&timenow, 0);
timersub(&timenow, ×tart, &diff);
BuildPesPacket(Data(), Size(),(int)(diff.tv_sec*90000.0 + (diff.tv_usec*90000.0)/1000000.0));
player->Wait();
}*/
/* Methode B ************************************************************/
//for (int i=1;i<= 25 && player->m_bActive;i++) {
// BuildPesPacket(Data(), Size(),i);
//}
/* Methode C ************************************************************/
//BuildPesPacket(Data(), Size(),1);
/* Methode D ************************************************************/
//player->DeviceStillPicture(Data(), Size());
/* Methode E ************************************************************/
unsigned int nFrameSize = GetFrameSize(nFrame);
if(nFrameSize) // Skip empty Frames
{
BuildPesPacket(Data() + nFrameOff, nFrameSize,1);
nFrameOff += nFrameSize;
}
if(++nFrame>=GetFrames())
{
nFrame = 0;
nFrameOff = 0;
}
nMircoSekWait = (1000000/(GetFrameRate()*4)); // Wait duration off 1/4 frame
if (!m_bThreadRun)
break;
}
//Reduce CPU load!!!
usleep(max(10000,nMircoSekWait));
}
m_bThreadRun=false;
}
//taken from mp1osd.c
void cStillImage::BuildPesPacket(const unsigned char *data, int len, int timestamp) {
#define PES_MAX_SIZE 2048
int ptslen = timestamp ? 5 : 1;
static unsigned char pes_header[PES_MAX_SIZE];
// startcode:
pes_header[0] = pes_header[1] = 0;
pes_header[2] = 1;
pes_header[3] = 0xe0;
while (len > 0)
{
int payload_size = len; // data + PTS
if (6 + ptslen + payload_size > PES_MAX_SIZE)
payload_size = PES_MAX_SIZE - (6 + ptslen);
// construct PES header: (code from ffmpeg's libav)
// packetsize:
pes_header[4] = (ptslen + payload_size) >> 8;
pes_header[5] = (ptslen + payload_size) & 255;
if (ptslen == 5)
{
int x;
// presentation time stamp:
x = (0x02 << 4) | (((timestamp >> 30) & 0x07) << 1) | 1;
pes_header[8] = x;
x = ((((timestamp >> 15) & 0x7fff) << 1) | 1);
pes_header[7] = x >> 8;
pes_header[8] = x & 255;
x = ((((timestamp) & 0x7fff) << 1) | 1);
pes_header[9] = x >> 8;
pes_header[10] = x & 255;
}
else
{
// stuffing and header bits:
pes_header[6] = 0x0f;
}
memcpy (&pes_header[6 + ptslen], data, payload_size);
player->Wait();
player->Play(pes_header, 6 + ptslen + payload_size);
len -= payload_size;
data += payload_size;
ptslen = 1; // store PTS only once, at first packet!
}
}
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