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| -rw-r--r-- | src/dv1394.cc | 202 |
1 files changed, 202 insertions, 0 deletions
diff --git a/src/dv1394.cc b/src/dv1394.cc new file mode 100644 index 0000000..26953d9 --- /dev/null +++ b/src/dv1394.cc @@ -0,0 +1,202 @@ +/* -*- 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 file is part of MIaV. + * + * MIaV 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. + * + * MIaV 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 MIaV; 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" + +#ifdef USE_GUI + +#include "dv.h" + + +#include <stdlib.h> +#include <memory.h> +#include <stdio.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <fcntl.h> +#include <errno.h> + +/** + * Callback function for the firewire interface. + */ +static raw1394_iso_disposition raw_reader(raw1394handle_t handle, + unsigned char *data, + unsigned int length, + unsigned char channel, + unsigned char tag, + unsigned char sy, + unsigned int cycle, + unsigned int dropped) +{ + static char *framedata = NULL; + + // Only process packets with reasonable length. + if ( length > 16 ) + { + unsigned char * p = ( unsigned char* ) & data[ 8 ]; + 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 + fprintf(stderr, "Framedata allocation error: %s.\n", strerror( errno ) ); fflush(stderr); + 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 RAW1394_ISO_OK; +} + +dv1394::dv1394(Info *i, int p, int c) +{ + info = i; + port = p; + channel = c; +} + +dv1394::~dv1394() +{ + // Close firewire connection. + if(handle) { + raw1394_iso_shutdown(handle); + raw1394_destroy_handle(handle); + } +} + +bool dv1394::connect() +{ + int n_ports; + struct raw1394_portinfo pinf[ 16 ]; + + // Get handle to firewire channels + handle = raw1394_new_handle(); + if(!handle) { + info->error("raw1394 - failed to get handle: %s.", strerror( errno ) ); + return false; + } + + // how many adapters are hooked in? + if((n_ports = raw1394_get_port_info(handle, pinf, 16)) < 0 ) { + info->error("raw1394 - failed to get port info: %s.", strerror( errno ) ); + raw1394_destroy_handle(handle); + handle = NULL; + return false; + } + + // Tell raw1394 which host adapter to use + if(raw1394_set_port(handle, port) < 0 ) { + info->error("raw1394 - failed to set port: %s.", strerror( errno ) ); + raw1394_destroy_handle(handle); + handle = NULL; + return false; + } + + int res = raw1394_iso_recv_init(handle, + raw_reader, + 488, + 512, // Wonder what this size should actually be!? + channel, + RAW1394_DMA_PACKET_PER_BUFFER,//RAW1394_DMA_DEFAULT, + -1); + if(res == -1) { + fprintf(stderr, "Error in raw1394_iso_recv_init: %s\n", strerror(errno)); + // exit(1); + } + + raw1394_set_userdata( handle, ( void* ) NULL); + + res = raw1394_iso_recv_start(handle, -1, -1, 0); + + if(res == -1) { + fprintf(stderr, "Error in raw1394_iso_recv_start: %s\n", strerror(errno)); + // exit(1); + } + + return true; +} + +unsigned char *dv1394::readFrame() +{ + // Firewire port not correctly opened. + if(!handle) return NULL; + + unsigned char *ptr; + while(1) { + raw1394_loop_iterate(handle); + ptr = (unsigned char *)raw1394_get_userdata(handle); + if(ptr) { + raw1394_set_userdata(handle, NULL); + break; + } + } + + return ptr; +} + +#endif/*USE_GUI*/ |