Very rudimentary pid & section filtering, uses code from libdvb. Does
not work anyway.
This commit is contained in:
Antti Seppälä
parent
638025eb26
commit
a7bd285fc6
4
Makefile
4
Makefile
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@ -1,7 +1,7 @@
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#
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# Makefile for a Video Disk Recorder plugin
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#
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# $Id: Makefile,v 1.6 2007/09/16 12:18:15 ajhseppa Exp $
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# $Id: Makefile,v 1.7 2007/09/19 15:14:32 ajhseppa Exp $
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# Debugging on/off
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#IPTV_DEBUG = 1
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@ -57,7 +57,7 @@ endif
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### The object files (add further files here):
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OBJS = $(PLUGIN).o config.o setup.o device.o streamer.o protocoludp.o protocolhttp.o protocolfile.o
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OBJS = $(PLUGIN).o config.o setup.o device.o streamer.o protocoludp.o protocolhttp.o protocolfile.o pidfilter.o
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### The main target:
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122
device.c
122
device.c
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@ -3,7 +3,7 @@
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*
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* See the README file for copyright information and how to reach the author.
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*
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* $Id: device.c,v 1.23 2007/09/18 18:48:10 rahrenbe Exp $
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* $Id: device.c,v 1.24 2007/09/19 15:14:32 ajhseppa Exp $
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*/
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#include "common.h"
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@ -25,6 +25,8 @@ cIptvDevice::cIptvDevice(unsigned int Index)
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debug("cIptvDevice::cIptvDevice(%d)\n", deviceIndex);
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tsBuffer = new cRingBufferLinear(MEGABYTE(IptvConfig.GetTsBufferSize()),
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(TS_SIZE * 2), false, "IPTV");
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memset(&filter, '\0', sizeof(filter));
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init_trans(&filter);
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tsBuffer->SetTimeouts(100, 100);
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// pad prefill to multiple of TS_SIZE
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tsBufferPrefill = MEGABYTE(IptvConfig.GetTsBufferSize()) *
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@ -36,6 +38,12 @@ cIptvDevice::cIptvDevice(unsigned int Index)
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pFileProtocol = new cIptvProtocolFile();
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pIptvStreamer = new cIptvStreamer(tsBuffer, &mutex);
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StartSectionHandler();
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for(int i = 0; i < 32; ++i) {
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filters[i].active = false;
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filters[i].fifoDesc = -1;
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}
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}
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cIptvDevice::~cIptvDevice()
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@ -44,6 +52,18 @@ cIptvDevice::~cIptvDevice()
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delete pIptvStreamer;
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delete pUdpProtocol;
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delete tsBuffer;
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// Iterate over all filters and clear their settings
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for (int i = 0; i < 32; ++i) {
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if (filters[i].active) {
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close(filters[i].fifoDesc);
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unlink(filters[i].pipeName);
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memset(filters[i].pipeName, '\0', sizeof(filters[i].pipeName));
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filters[i].fifoDesc = -1;
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filters[i].active = false;
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clear_trans_filt(&filter, i);
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}
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}
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}
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bool cIptvDevice::Initialize(unsigned int DeviceCount)
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@ -156,17 +176,46 @@ bool cIptvDevice::SetPid(cPidHandle *Handle, int Type, bool On)
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int cIptvDevice::OpenFilter(u_short Pid, u_char Tid, u_char Mask)
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{
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int pipeDesc[2];
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debug("cIptvDevice::OpenFilter(): Pid=%d Tid=%02X Mask=%02X\n", Pid, Tid, Mask);
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// Create a pipe
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if (pipe(pipeDesc) < 0) {
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char tmp[64];
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error("ERROR: pipe(): %s", strerror_r(errno, tmp, sizeof(tmp)));
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}
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// Write pipe is used by the pid filtering class
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// cIptvSectionFilter Filter(pipeDesc[1], Pid, Tid, Mask)
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// Give the read pipe to vdr
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return pipeDesc[0];
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// Search the next free filter slot
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for (int i = 0; i < 32; ++i) {
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if(!filters[i].active) {
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debug("cIptvDevice::OpenFilter(): Pid=0x%X Tid=%02X Mask=%02X, filterCount = %d\n", Pid, Tid, Mask, i);
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uint8_t mask = Mask;
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uint8_t filt = Tid;
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int err = set_trans_filt(&filter, i, Pid, &mask, &filt, 0);
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if (err < 0)
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error("Cannot set filter %d\n", i);
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memset(filters[i].pipeName, '\0', sizeof(filters[i].pipeName));
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snprintf(filters[i].pipeName, sizeof(filters[i].pipeName),
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"/tmp/iptvPipe.%d", i);
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err = mknod(filters[i].pipeName, 0644 | S_IFIFO, 0);
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if (err < 0) {
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char tmp[64];
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error("ERROR: mknod(): %s", strerror_r(errno, tmp, sizeof(tmp)));
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unlink(filters[i].pipeName);
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}
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// Create descriptors
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int fifoDescriptor = open(filters[i].pipeName, O_RDWR | O_NONBLOCK);
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int returnDescriptor = open(filters[i].pipeName, O_RDONLY | O_NONBLOCK);
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// Store the write pipe and set active flag
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filters[i].active = true;
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filters[i].fifoDesc = fifoDescriptor;
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//++filterCount;
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return returnDescriptor;
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}
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}
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// No free filter slot found
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return -1;
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}
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bool cIptvDevice::OpenDvr(void)
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@ -215,6 +264,55 @@ bool cIptvDevice::GetTSPacket(uchar *&Data)
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}
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isPacketDelivered = true;
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Data = p;
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memcpy(filter.packet, p, sizeof(filter.packet));
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trans_filt(p, 188, &filter);
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for(int i = 0; i < 32; ++i) {
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if(filters[i].active) {
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section *filtered = get_filt_sec(&filter, i);
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if (filtered->found) {
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// Select on the fifo emptyness. Using null timeout to return
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// immediately
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struct timeval tv;
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tv.tv_sec = 0;
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tv.tv_usec = 0;
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fd_set rfds;
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FD_ZERO(&rfds);
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FD_SET(filters[i].fifoDesc, &rfds);
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int retval = select(filters[i].fifoDesc + 1, &rfds, NULL, NULL,
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&tv);
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// Check if error
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if (retval < 0) {
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char tmp[64];
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error("ERROR: select(): %s", strerror_r(errno, tmp, sizeof(tmp)));
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// VDR has probably closed the filter file descriptor.
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// Clear the filter
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close(filters[i].fifoDesc);
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unlink(filters[i].pipeName);
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memset(filters[i].pipeName, '\0', sizeof(filters[i].pipeName));
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filters[i].fifoDesc = -1;
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filters[i].active = false;
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clear_trans_filt(&filter, i);
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}
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// There is no data in the fifo, more can be written
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if (!retval) {
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int err = write(filters[i].fifoDesc, filtered->payload,
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filtered->length+3);
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if (err < 0) {
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char tmp[64];
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error("ERROR: write(): %s", strerror_r(errno, tmp,
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sizeof(tmp)));
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}
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}
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}
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}
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}
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return true;
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}
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Data = NULL;
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14
device.h
14
device.h
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@ -3,7 +3,7 @@
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*
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* See the README file for copyright information and how to reach the author.
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*
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* $Id: device.h,v 1.9 2007/09/16 13:11:19 rahrenbe Exp $
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* $Id: device.h,v 1.10 2007/09/19 15:14:32 ajhseppa Exp $
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*/
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#ifndef __IPTV_DEVICE_H
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@ -16,6 +16,16 @@
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#include "protocolfile.h"
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#include "streamer.h"
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#include "pidfilter.h"
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struct filterInfo {
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bool active;
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int fifoDesc;
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char pipeName[128];
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int lastProvided;
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};
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class cIptvDevice : public cDevice {
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// static ones
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public:
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@ -37,6 +47,8 @@ private:
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//cIptvProtocolRtsp *pRtspProtocol;
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cIptvStreamer *pIptvStreamer;
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cMutex mutex;
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trans filter;
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filterInfo filters[32];
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// constructor & destructor
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public:
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@ -0,0 +1,334 @@
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/*
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* dvb-mpegtools for the Siemens Fujitsu DVB PCI card
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*
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* Copyright (C) 2000, 2001 Marcus Metzler
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* for convergence integrated media GmbH
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* Copyright (C) 2002 Marcus Metzler
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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* Or, point your browser to http://www.gnu.org/copyleft/gpl.html
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*
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* The author can be reached at mocm@metzlerbros.de,
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*/
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#include "pidfilter.h"
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#define PID_MASK_HI 0x1F
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uint16_t get_pid(uint8_t *pid)
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{
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uint16_t pp = 0;
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pp = (pid[0] & PID_MASK_HI)<<8;
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pp |= pid[1];
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return pp;
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}
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#define ADAPT_FIELD 0x20
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#define PAYLOAD 0x10
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#define PAY_START 0x40
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/*
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conversion
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*/
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void init_trans(trans *p)
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{
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int i;
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p->found = 0;
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p->pes = 0;
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p->is_full = 0;
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p->pes_start = 0;
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p->pes_started = 0;
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p->set = 0;
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for (i = 0; i < MASKL*MAXFILT ; i++){
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p->mask[i] = 0;
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p->filt[i] = 0;
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}
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for (i = 0; i < MAXFILT ; i++){
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p->sec[i].found = 0;
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p->sec[i].length = 0;
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}
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}
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int set_trans_filt(trans *p, int filtn, uint16_t pid, uint8_t *mask, uint8_t *filt, int pes)
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{
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int i;
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int off;
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if ( filtn > MAXFILT-1 || filtn<0 ) return -1;
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p->pid[filtn] = pid;
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if (pes) p->pes |= (tflags)(1 << filtn);
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else {
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off = MASKL*filtn;
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p->pes &= ~((tflags) (1 << filtn) );
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for (i = 0; i < MASKL ; i++){
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p->mask[off+i] = mask[i];
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p->filt[off+i] = filt[i];
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}
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}
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p->set |= (tflags) (1 << filtn);
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return 0;
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}
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void clear_trans_filt(trans *p,int filtn)
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{
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int i;
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p->set &= ~((tflags) (1 << filtn) );
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p->pes &= ~((tflags) (1 << filtn) );
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p->is_full &= ~((tflags) (1 << filtn) );
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p->pes_start &= ~((tflags) (1 << filtn) );
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p->pes_started &= ~((tflags) (1 << filtn) );
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for (i = MASKL*filtn; i < MASKL*(filtn+1) ; i++){
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p->mask[i] = 0;
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p->filt[i] = 0;
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}
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p->sec[filtn].found = 0;
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p->sec[filtn].length = 0;
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}
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int filt_is_set(trans *p, int filtn)
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{
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if (p->set & ((tflags)(1 << filtn))) return 1;
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return 0;
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}
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int pes_is_set(trans *p, int filtn)
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{
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if (p->pes & ((tflags)(1 << filtn))) return 1;
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return 0;
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}
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int pes_is_started(trans *p, int filtn)
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{
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if (p->pes_started & ((tflags)(1 << filtn))) return 1;
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return 0;
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}
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int pes_is_start(trans *p, int filtn)
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{
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if (p->pes_start & ((tflags)(1 << filtn))) return 1;
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return 0;
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}
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int filt_is_ready(trans *p,int filtn)
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{
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if (p->is_full & ((tflags)(1 << filtn))) return 1;
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return 0;
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}
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void trans_filt(uint8_t *buf, int count, trans *p)
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{
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int c=0;
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//fprintf(stderr,"trans_filt\n");
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while (c < count && p->found <1 ){
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if ( buf[c] == 0x47) p->found = 1;
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c++;
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p->packet[0] = 0x47;
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}
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if (c == count) return;
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while( c < count && p->found < 188 && p->found > 0 ){
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p->packet[p->found] = buf[c];
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c++;
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p->found++;
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}
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if (p->found == 188){
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p->found = 0;
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tfilter(p);
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}
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if (c < count) trans_filt(buf+c,count-c,p);
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}
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void tfilter(trans *p)
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{
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int l,c;
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int tpid;
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uint8_t flag,flags;
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uint8_t adapt_length = 0;
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uint8_t cpid[2];
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// fprintf(stderr,"tfilter\n");
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cpid[0] = p->packet[1];
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cpid[1] = p->packet[2];
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tpid = get_pid(cpid);
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if ( p->packet[1]&0x80){
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fprintf(stderr,"Error in TS for PID: %d\n",
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tpid);
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}
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flag = cpid[0];
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flags = p->packet[3];
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if ( flags & ADAPT_FIELD ) {
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// adaption field
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adapt_length = p->packet[4];
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}
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c = 5 + adapt_length - (int)(!(flags & ADAPT_FIELD));
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if (flags & PAYLOAD){
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for ( l = 0; l < MAXFILT ; l++){
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if ( filt_is_set(p,l) ) {
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if ( p->pid[l] == tpid) {
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if ( pes_is_set(p,l) ){
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if (cpid[0] & PAY_START){
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p->pes_started |=
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(tflags)
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(1 << l);
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p->pes_start |=
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(tflags)
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(1 << l);
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} else {
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p->pes_start &= ~
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((tflags)
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(1 << l));
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}
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pes_filter(p,l,c);
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} else {
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sec_filter(p,l,c);
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}
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}
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}
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}
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}
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}
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void pes_filter(trans *p, int filtn, int off)
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{
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int count,c;
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uint8_t *buf;
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if (filtn < 0 || filtn >= MAXFILT) return;
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count = 188 - off;
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c = 188*filtn;
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buf = p->packet+off;
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if (pes_is_started(p,filtn)){
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p->is_full |= (tflags) (1 << filtn);
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memcpy(p->transbuf+c,buf,count);
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p->transcount[filtn] = count;
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}
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}
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section *get_filt_sec(trans *p, int filtn)
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{
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section *sec;
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sec = &p->sec[filtn];
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p->is_full &= ~((tflags) (1 << filtn) );
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return sec;
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}
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int get_filt_buf(trans *p, int filtn,uint8_t **buf)
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{
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*buf = p->transbuf+188*filtn;
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p->is_full &= ~((tflags) (1 << filtn) );
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return p->transcount[filtn];
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}
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void sec_filter(trans *p, int filtn, int off)
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{
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int i,j;
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int error;
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int count,c;
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uint8_t *buf, *secbuf;
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section *sec;
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|
||||
// fprintf(stderr,"sec_filter\n");
|
||||
|
||||
if (filtn < 0 || filtn >= MAXFILT) return;
|
||||
|
||||
count = 188 - off;
|
||||
c = 0;
|
||||
buf = p->packet+off;
|
||||
sec = &p->sec[filtn];
|
||||
secbuf = sec->payload;
|
||||
if(!filt_is_ready(p,filtn)){
|
||||
p->is_full &= ~((tflags) (1 << filtn) );
|
||||
sec->found = 0;
|
||||
sec->length = 0;
|
||||
}
|
||||
|
||||
if ( !sec->found ){
|
||||
c = buf[c]+1;
|
||||
if (c >= count) return;
|
||||
sec->id = buf[c];
|
||||
secbuf[0] = buf[c];
|
||||
c++;
|
||||
sec->found++;
|
||||
sec->length = 0;
|
||||
}
|
||||
|
||||
while ( c < count && sec->found < 3){
|
||||
secbuf[sec->found] = buf[c];
|
||||
c++;
|
||||
sec->found++;
|
||||
}
|
||||
if (c == count) return;
|
||||
|
||||
if (!sec->length && sec->found == 3){
|
||||
sec->length |= ((secbuf[1] & 0x0F) << 8);
|
||||
sec->length |= (secbuf[2] & 0xFF);
|
||||
}
|
||||
|
||||
while ( c < count && sec->found < sec->length+3){
|
||||
secbuf[sec->found] = buf[c];
|
||||
c++;
|
||||
sec->found++;
|
||||
}
|
||||
|
||||
if ( sec->length && sec->found == sec->length+3 ){
|
||||
error=0;
|
||||
for ( i = 0; i < MASKL; i++){
|
||||
if (i > 0 ) j=2+i;
|
||||
else j = 0;
|
||||
error += (sec->payload[j]&p->mask[MASKL*filtn+i])^
|
||||
(p->filt[MASKL*filtn+i]&
|
||||
p->mask[MASKL*filtn+i]);
|
||||
}
|
||||
if (!error){
|
||||
p->is_full |= (tflags) (1 << filtn);
|
||||
}
|
||||
if (buf[0]+1 < c ) c=count;
|
||||
}
|
||||
|
||||
if ( c < count ) sec_filter(p, filtn, off);
|
||||
|
||||
}
|
||||
|
||||
|
||||
extern int errno;
|
||||
const char * strerrno (void)
|
||||
{
|
||||
return strerror(errno);
|
||||
}
|
||||
|
|
@ -0,0 +1,92 @@
|
|||
/*
|
||||
* dvb-mpegtools for the Siemens Fujitsu DVB PCI card
|
||||
*
|
||||
* Copyright (C) 2000, 2001 Marcus Metzler
|
||||
* for convergence integrated media GmbH
|
||||
* Copyright (C) 2002 Marcus Metzler
|
||||
*
|
||||
* 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.
|
||||
* Or, point your browser to http://www.gnu.org/copyleft/gpl.html
|
||||
*
|
||||
|
||||
* The author can be reached at mocm@metzlerbros.de,
|
||||
*/
|
||||
|
||||
|
||||
#include <stdio.h>
|
||||
#include <errno.h>
|
||||
#include <unistd.h>
|
||||
#include <string.h>
|
||||
#include <sys/types.h>
|
||||
#include <fcntl.h>
|
||||
#include <stdint.h>
|
||||
|
||||
#include <sys/param.h>
|
||||
|
||||
|
||||
#ifndef __PIDFILTER_H
|
||||
#define __PIDFILTER_H
|
||||
|
||||
#define MAX_PLENGTH 0xFFFF
|
||||
|
||||
typedef struct sectionstruct {
|
||||
int id;
|
||||
int length;
|
||||
int found;
|
||||
uint8_t payload[4096+3];
|
||||
} section;
|
||||
|
||||
|
||||
typedef uint32_t tflags;
|
||||
#define MAXFILT 32
|
||||
#define MASKL 16
|
||||
typedef struct trans_struct {
|
||||
int found;
|
||||
uint8_t packet[188];
|
||||
uint16_t pid[MAXFILT];
|
||||
uint8_t mask[MAXFILT*MASKL];
|
||||
uint8_t filt[MAXFILT*MASKL];
|
||||
uint8_t transbuf[MAXFILT*188];
|
||||
int transcount[MAXFILT];
|
||||
section sec[MAXFILT];
|
||||
tflags is_full;
|
||||
tflags pes_start;
|
||||
tflags pes_started;
|
||||
tflags pes;
|
||||
tflags set;
|
||||
} trans;
|
||||
|
||||
|
||||
void init_trans(trans *p);
|
||||
int set_trans_filt(trans *p, int filtn, uint16_t pid, uint8_t *mask,
|
||||
uint8_t *filt, int pes);
|
||||
|
||||
void clear_trans_filt(trans *p,int filtn);
|
||||
int filt_is_set(trans *p, int filtn);
|
||||
int filt_is_ready(trans *p,int filtn);
|
||||
|
||||
void trans_filt(uint8_t *buf, int count, trans *p);
|
||||
void tfilter(trans *p);
|
||||
void sec_filter(trans *p, int filtn, int off);
|
||||
int get_filt_buf(trans *p, int filtn,uint8_t **buf);
|
||||
section *get_filt_sec(trans *p, int filtn);
|
||||
|
||||
|
||||
uint16_t get_pid(uint8_t *pid);
|
||||
void pes_filter(trans *p, int filtn, int off);
|
||||
|
||||
#endif //__PIDFILTER_H
|
||||
Loading…
Reference in New Issue