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* libdvbdemux - a DVB demux library
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* Copyright (C) 2005 Andrew de Quincey (adq_dvb@lidskialf.net)
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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* This library 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 GNU
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* Lesser General Public License for more details.
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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#define LIBDVBDEMUX_H 1
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* Source of the data to be demuxed.
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* FRONTEND. The data will be read from the frontend on the adapter.
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* DVR. The data will be read from the DVR device of the adapter (of course,
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* you need to write data TO the DVR device as well).
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#define DVBDEMUX_INPUT_FRONTEND 0
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#define DVBDEMUX_INPUT_DVR 1
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* Destination of the demuxed data.
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* DECODER. Sends the data directly to a hardware decoder (if present).
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* DEMUX. Sends the PID stream to the current demux file descriptor. HOWEVER, the
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* data will be the payload *only* - transport stream headers will be stripped.
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* DVR sends the data to the DVR device. The data will be the complete transport
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* stream packets with headers intact. Note: if multiple filters specify
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* DVBDEMUX_OUTPUT_DVR, the individual PID streams will be re-multiplexed
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#define DVBDEMUX_OUTPUT_DECODER 0
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#define DVBDEMUX_OUTPUT_DEMUX 1
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#define DVBDEMUX_OUTPUT_DVR 2
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#define DVBDEMUX_PESTYPE_AUDIO 0
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#define DVBDEMUX_PESTYPE_VIDEO 1
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#define DVBDEMUX_PESTYPE_TELETEXT 2
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#define DVBDEMUX_PESTYPE_SUBTITLE 3
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#define DVBDEMUX_PESTYPE_PCR 4
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* Open a demux device. Can be called multiple times. These let you setup a
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* single filter per FD. It can can also be read() from if you use a section
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* filter, or create a pes_filter or raw_filter with output DVBDEMUX_OUTPUT_DEMUX.
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* @param adapter Index of the DVB adapter.
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* @param demuxdevice Index of the demux device on that adapter (usually 0).
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* @param nonblocking If 1, frontend will be opened in nonblocking mode.
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* @return A unix file descriptor on success, or -1 on failure.
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extern int dvbdemux_open_demux(int adapter, int demuxdevice, int nonblocking);
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* Open a DVR device. May be opened for writing once, or multiple times in readonly
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* mode. It is used to either write() transport stream data to be demuxed
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* (if input == DVBDEMUX_INPUT_DVR), or to read() a stream of demuxed data
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* (if output == DVBDEMUX_OUTPUT_DVR).
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* Note, all demux filters with output set to DVBDEMUX_OUTPUT_DVR will be
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* multiplexed together and output their data on this device.
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* @param adapter Index of the DVB adapter.
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* @param dvrdevice Index of the dvr device on that adapter (usually 0)
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* @param readonly If 1, frontend will be opened in readonly mode only.
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* @param nonblocking If 1, frontend will be opened in nonblocking mode.
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* @return A unix file descriptor on success, or -1 on failure.
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extern int dvbdemux_open_dvr(int adapter, int dvrdevice, int readonly, int nonblocking);
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* Set filter for the first 18 bytes of decoded SI table sections. Note that
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* bytes 1 and 2 are _not_ filtered since they contain the length field.
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* Conceptually, the driver computes the following for each filtered bit.
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* (filter[X].bit[Y] & mask[X].bit[Y]) == (header[X].bit[Y] & mask[X].bit[Y])
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* Any sections which do not match this criteria for every bit will be discarded.
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* The SI data is always read from the frontend, and is always returned by
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* read()ing the demux fd. FIXME: check this statement!
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* @param fd FD as opened with dvbdemux_open_demux() above.
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* @param pid PID of the stream.
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* @param filter The filter values of the first 18 bytes of the desired sections.
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* @param mask Bitmask indicating which bits in the filter array should be tested
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* (if a bit is 1, it will be tested).
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* @param start If 1, the filter will be started immediately. Otherwise you must
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* call dvbdemux_start() manually.
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* @param checkcrc If 1, the driver will check the CRC on the table sections.
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* Any bad sections will be dropped.
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* @return 0 on success, nonzero on failure.
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extern int dvbdemux_set_section_filter(int fd, int pid,
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uint8_t filter[18], uint8_t mask[18],
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int start, int checkcrc);
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* Set filter for a stream of PES data. This call can only used for cards
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* equipped with a hardware decoder.
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* @param fd FD as opened with dvbdemux_open_demux() above.
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* @param pid PID of the stream.
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* @param input One of DVBDEMUX_INPUT_*.
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* @param output One of DVBDEMUX_OUTPUT_*.
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* @param pestype One of DVBDEMUX_PESTYPE_* - this tells the decoder the type
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* of data in this stream.
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* @param start If 1, the filter will be started immediately. Otherwise you must
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* call dvbdemux_start() manually.
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* @return 0 on success, nonzero on failure.
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extern int dvbdemux_set_pes_filter(int fd, int pid,
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int input, int output,
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* Create a pid filter - this will extract transport stream packets for a
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* Note: The wildcard PID can only be used on "budget" cards.
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* @param fd FD as opened with dvbdemux_open_demux() above.
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* @param pid PID to retrieve, or use -1 as a wildcard for ALL PIDs.
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* @param input One of DVBDEMUX_INPUT_*.
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* @param output One of DVBDEMUX_OUTPUT_*.
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* @param start If 1, the filter will be started immediately. Otherwise you must
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* call dvbdemux_start() manually.
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* @return 0 on success, nonzero on failure.
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extern int dvbdemux_set_pid_filter(int fd, int pid,
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int input, int output,
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* Start a demux going.
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* @param fd FD as opened with dvbdemux_open_demux() above.
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* @return 0 on success, nonzero on failure.
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extern int dvbdemux_start(int fd);
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* @param fd FD as opened with dvbdemux_open_demux() above.
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* @return 0 on success, nonzero on failure.
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extern int dvbdemux_stop(int fd);
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* Retrieve the current STC from the demux. This call can only used for cards
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* equipped with a hardware decoder.
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* @param fd FD as opened with dvbdemux_open_demux() above.
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* @param stc Where to put the retrieved STC value (in 90kHz clock).
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* @return 0 on success, nonzero on failure.
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extern int dvbdemux_get_stc(int fd, uint64_t *stc);
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* Change the internal buffer size used by the demuxer. The default buffer size
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* is 8192 bytes. Can only be used if the demux in question is stopped.
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* @param fd FD as opened with dvbdemux_open_demux() above.
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* @param bufsize New buffer size to use.
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* @return 0 on success, nonzero on failure.
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extern int dvbdemux_set_buffer(int fd, int bufsize);
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#endif // LIBDVBDEMUX_H
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src/libdvbapi/dvbdemux.h
