diff options
Diffstat (limited to 'lib/libdvbapi/dvbdemux.c')
| -rw-r--r-- | lib/libdvbapi/dvbdemux.c | 255 |
1 files changed, 255 insertions, 0 deletions
diff --git a/lib/libdvbapi/dvbdemux.c b/lib/libdvbapi/dvbdemux.c new file mode 100644 index 0000000..a882af6 --- /dev/null +++ b/lib/libdvbapi/dvbdemux.c @@ -0,0 +1,255 @@ +/* + * libdvbdemux - a DVB demux library + * + * Copyright (C) 2005 Andrew de Quincey (adq_dvb@lidskialf.net) + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA + */ + +#include <stdlib.h> +#include <string.h> +#include <stdio.h> +#include <sys/param.h> +#include <sys/ioctl.h> +#include <fcntl.h> +#include <unistd.h> +#include <ctype.h> +#include <errno.h> +#include <linux/dvb/dmx.h> +#include "dvbdemux.h" + + +int dvbdemux_open_demux(int adapter, int demuxdevice, int nonblocking) +{ + char filename[PATH_MAX+1]; + int flags = O_RDWR; + int fd; + + if (nonblocking) + flags |= O_NONBLOCK; + + sprintf(filename, "/dev/dvb/adapter%i/demux%i", adapter, demuxdevice); + if ((fd = open(filename, flags)) < 0) { + // if that failed, try a flat /dev structure + sprintf(filename, "/dev/dvb%i.demux%i", adapter, demuxdevice); + fd = open(filename, flags); + } + + return fd; +} + +int dvbdemux_open_dvr(int adapter, int dvrdevice, int readonly, int nonblocking) +{ + char filename[PATH_MAX+1]; + int flags = O_RDWR; + int fd; + + if (readonly) + flags = O_RDONLY; + if (nonblocking) + flags |= O_NONBLOCK; + + sprintf(filename, "/dev/dvb/adapter%i/dvr%i", adapter, dvrdevice); + if ((fd = open(filename, flags)) < 0) { + // if that failed, try a flat /dev structure + sprintf(filename, "/dev/dvb%i.dvr%i", adapter, dvrdevice); + fd = open(filename, flags); + } + + return fd; +} + +int dvbdemux_set_section_filter(int fd, int pid, + uint8_t filter[18], uint8_t mask[18], + int start, int checkcrc) +{ + struct dmx_sct_filter_params sctfilter; + + memset(&sctfilter, 0, sizeof(sctfilter)); + sctfilter.pid = pid; + memcpy(sctfilter.filter.filter, filter, 1); + memcpy(sctfilter.filter.filter+1, filter+3, 15); + memcpy(sctfilter.filter.mask, mask, 1); + memcpy(sctfilter.filter.mask+1, mask+3, 15); + memset(sctfilter.filter.mode, 0, 16); + if (start) + sctfilter.flags |= DMX_IMMEDIATE_START; + if (checkcrc) + sctfilter.flags |= DMX_CHECK_CRC; + + return ioctl(fd, DMX_SET_FILTER, &sctfilter); +} + +int dvbdemux_set_pes_filter(int fd, int pid, + int input, int output, + int pestype, + int start) +{ + struct dmx_pes_filter_params filter; + + memset(&filter, 0, sizeof(filter)); + filter.pid = pid; + + switch(input) { + case DVBDEMUX_INPUT_FRONTEND: + filter.input = DMX_IN_FRONTEND; + break; + + case DVBDEMUX_INPUT_DVR: + filter.input = DMX_IN_DVR; + break; + + default: + return -EINVAL; + } + + switch(output) { + case DVBDEMUX_OUTPUT_DECODER: + filter.output = DMX_OUT_DECODER; + break; + + case DVBDEMUX_OUTPUT_DEMUX: + filter.output = DMX_OUT_TAP; + break; + + case DVBDEMUX_OUTPUT_DVR: + filter.output = DMX_OUT_TS_TAP; + break; + +#ifdef DMX_OUT_TSDEMUX_TAP + case DVBDEMUX_OUTPUT_TS_DEMUX: + filter.output = DMX_OUT_TSDEMUX_TAP; + break; +#endif + + default: + return -EINVAL; + } + + switch(pestype) { + case DVBDEMUX_PESTYPE_AUDIO: + filter.pes_type = DMX_PES_AUDIO; + break; + + case DVBDEMUX_PESTYPE_VIDEO: + filter.pes_type = DMX_PES_VIDEO; + break; + + case DVBDEMUX_PESTYPE_TELETEXT: + filter.pes_type = DMX_PES_TELETEXT; + break; + + case DVBDEMUX_PESTYPE_SUBTITLE: + filter.pes_type = DMX_PES_SUBTITLE; + break; + + case DVBDEMUX_PESTYPE_PCR: + filter.pes_type = DMX_PES_PCR; + break; + + default: + return -EINVAL; + } + + if (start) + filter.flags |= DMX_IMMEDIATE_START; + + return ioctl(fd, DMX_SET_PES_FILTER, &filter); +} + +int dvbdemux_set_pid_filter(int fd, int pid, + int input, int output, + int start) +{ + struct dmx_pes_filter_params filter; + + memset(&filter, 0, sizeof(filter)); + if (pid == -1) + filter.pid = 0x2000; + else + filter.pid = pid; + + switch(input) { + case DVBDEMUX_INPUT_FRONTEND: + filter.input = DMX_IN_FRONTEND; + break; + + case DVBDEMUX_INPUT_DVR: + filter.input = DMX_IN_DVR; + break; + + default: + return -EINVAL; + } + + switch(output) { + case DVBDEMUX_OUTPUT_DECODER: + filter.output = DMX_OUT_DECODER; + break; + + case DVBDEMUX_OUTPUT_DEMUX: + filter.output = DMX_OUT_TAP; + break; + + case DVBDEMUX_OUTPUT_DVR: + filter.output = DMX_OUT_TS_TAP; + break; + +#ifdef DMX_OUT_TSDEMUX_TAP + case DVBDEMUX_OUTPUT_TS_DEMUX: + filter.output = DMX_OUT_TSDEMUX_TAP; + break; +#endif + + default: + return -EINVAL; + } + + filter.pes_type = DMX_PES_OTHER; + + if (start) + filter.flags |= DMX_IMMEDIATE_START; + + return ioctl(fd, DMX_SET_PES_FILTER, &filter); +} + +int dvbdemux_start(int fd) +{ + return ioctl(fd, DMX_START); +} + +int dvbdemux_stop(int fd) +{ + return ioctl(fd, DMX_STOP); +} + +int dvbdemux_get_stc(int fd, uint64_t *stc) +{ + struct dmx_stc _stc; + int result; + + memset(stc, 0, sizeof(_stc)); + if ((result = ioctl(fd, DMX_GET_STC, &_stc)) != 0) { + return result; + } + + *stc = _stc.stc / _stc.base; + return 0; +} + +int dvbdemux_set_buffer(int fd, int bufsize) +{ + return ioctl(fd, DMX_SET_BUFFER_SIZE, bufsize); +} |