diff options
Diffstat (limited to 'src/dv1394.cc')
| -rw-r--r-- | src/dv1394.cc | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/src/dv1394.cc b/src/dv1394.cc new file mode 100644 index 0000000..ea702a6 --- /dev/null +++ b/src/dv1394.cc @@ -0,0 +1,124 @@ +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/*************************************************************************** + * dv1394.cc + * + * Tue Apr 19 12:10:34 CEST 2005 + * Copyright 2005 Bent Bisballe + * deva@aasimon.org + ****************************************************************************/ + +/* + * 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 <config.h> +#include "dv1394.h" + +init { + // FIXME: Read port and channel data from config. + int port = 0; + int channel = 63; // 63 is default channel... sucks. + + int n_ports; + struct raw1394_portinfo pinf[ 16 ]; + raw1394handle_t handle; + + // Get handle to firewire channels + handle = raw1394_new_handle(); + if(!handle) { + fprintf( stderr, "raw1394 - failed to get handle: %s.\n", strerror( errno ) ); + exit( EXIT_FAILURE ); + } + + // how many adapters are hook in? + if((n_ports = raw1394_get_port_info(handle, pinf, 16)) < 0 ) { + fprintf( stderr, "raw1394 - failed to get port info: %s.\n", strerror( errno ) ); + raw1394_destroy_handle( handle ); + exit( EXIT_FAILURE ); + } + + // Tell raw1394 which host adapter to use + if(raw1394_set_port(handle, port) < 0 ) { + errobj->pushError("Error while opening codec for input stream."); + fprintf( stderr, "raw1394 - failed to set port: %s.\n", strerror( errno ) ); + exit( EXIT_FAILURE ); + } + + raw1394_set_iso_handler( handle, channel, raw_reader); + raw1394_set_userdata( handle, ( void* ) NULL); + raw1394_start_iso_rcv( handle, channel); + +} + +static int raw_reader( raw1394handle_t handle, int channel, size_t length, quadlet_t *data ) +{ + static char *framedata = NULL; + + // Only process packets with reasonable length. + if ( length > 16 ) + { + unsigned char * p = ( unsigned char* ) & data[ 3 ]; + int section_type = p[ 0 ] >> 5; // section type is in bits 5 - 7 + int dif_sequence = p[ 1 ] >> 4; // dif sequence number is in bits 4 - 7 + int dif_block = p[ 2 ]; + + if ( section_type == 0 && dif_sequence == 0 ) + { + if ( framedata != NULL ) + { + raw1394_set_userdata(handle, (void *)framedata); + framedata = NULL; + } + } + + if(!framedata) + { + framedata = (char *)malloc(DVPACKAGE_SIZE); // dvframe.h + if(!framedata) + { + // We're fucked + exit(1); + } + } + + switch ( section_type ) + { + case 0: // 1 Header block + // p[3] |= 0x80; // hack to force PAL data + memcpy( framedata + dif_sequence * 150 * 80, p, 480 ); + break; + + case 1: // 2 Subcode blocks + memcpy( framedata + dif_sequence * 150 * 80 + ( 1 + dif_block ) * 80, p, 480 ); + break; + + case 2: // 3 VAUX blocks + memcpy( framedata + dif_sequence * 150 * 80 + ( 3 + dif_block ) * 80, p, 480 ); + break; + + case 3: // 9 Audio blocks interleaved with video + memcpy( framedata + dif_sequence * 150 * 80 + ( 6 + dif_block * 16 ) * 80, p, 480 ); + break; + + case 4: // 135 Video blocks interleaved with audio + memcpy( framedata + dif_sequence * 150 * 80 + ( 7 + ( dif_block / 15 ) + dif_block ) * 80, p, 480 ); + break; + + default: // we can't handle any other data + break; + } + } + return 0; +} |