diff options
Diffstat (limited to 'debian/transcode/transcode-1.1.7/import/extract_dv.c')
| -rw-r--r-- | debian/transcode/transcode-1.1.7/import/extract_dv.c | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/debian/transcode/transcode-1.1.7/import/extract_dv.c b/debian/transcode/transcode-1.1.7/import/extract_dv.c new file mode 100644 index 00000000..a5c5a919 --- /dev/null +++ b/debian/transcode/transcode-1.1.7/import/extract_dv.c @@ -0,0 +1,178 @@ +/* + * extract_dv.c + * + * Copyright (C) Thomas Oestreich - June 2001 + * + * This file is part of transcode, a video stream processing tool + * + * transcode 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, or (at your option) + * any later version. + * + * transcode 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 GNU Make; see the file COPYING. If not, write to + * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. + * + */ + +#include "transcode.h" +#include "libtc/libtc.h" +#include "tcinfo.h" + +#include "ioaux.h" +#include "avilib/avilib.h" +#include "tc.h" + +extern void import_exit(int ret); + +#define DV_PAL_FRAME_SIZE 144000 +#define DV_NTSC_FRAME_SIZE 120000 + + +/* ------------------------------------------------------------ + * + * dv extract thread + * + * magic: TC_MAGIC_AVI + * TC_MAGIC_RAW <-- default + * + * ------------------------------------------------------------*/ + +void extract_dv(info_t *ipipe) +{ + + avi_t *avifile=NULL; + char *video; + + int key, error=0; + + long frames, bytes, n; + + + /* ------------------------------------------------------------ + * + * AVI + * + * ------------------------------------------------------------*/ + + switch(ipipe->magic) { + + case TC_MAGIC_AVI: + + // scan file + if (ipipe->nav_seek_file) { + if(NULL == (avifile = AVI_open_indexfd(ipipe->fd_in,0,ipipe->nav_seek_file))) { + AVI_print_error("AVI open"); + import_exit(1); + } + } else { + if(NULL == (avifile = AVI_open_fd(ipipe->fd_in,1))) { + AVI_print_error("AVI open"); + import_exit(1); + } + } + + // read video info; + + frames = AVI_video_frames(avifile); + if (ipipe->frame_limit[1] < frames) + { + frames=ipipe->frame_limit[1]; + } + + if(ipipe->verbose & TC_STATS) + tc_log_msg(__FILE__, "%ld video frames", frames); + + if((video = tc_zalloc(DV_PAL_FRAME_SIZE))==NULL) { + tc_log_error(__FILE__, "out of memory"); + error=1; + break; + } + (int)AVI_set_video_position(avifile,ipipe->frame_limit[0]); + for (n=ipipe->frame_limit[0]; n<=frames; ++n) { + + // video + if((bytes = AVI_read_frame(avifile, video, &key))<0) { + error=1; + break; + } + if(tc_pwrite(ipipe->fd_out, video, bytes)!=bytes) { + error=1; + break; + } + } + + free(video); + + break; + + + /* ------------------------------------------------------------ + * + * RAW + * + * RAW frame skipping code lifted from VLC, which lifted + * (some of it) from libdv. + * + * ------------------------------------------------------------*/ + + + case TC_MAGIC_RAW: + + default: + { + unsigned char frame[DV_PAL_FRAME_SIZE]; + ssize_t size; + + if(ipipe->magic == TC_MAGIC_UNKNOWN) + tc_log_warn(__FILE__, "no file type specified, assuming %s", + filetype(TC_MAGIC_RAW)); + + /* Skip to the first desired frame. */ + for(n=0; n<ipipe->frame_limit[0]; ++n) { + /* The first 32 bits contain the flag for PAL or NTSC frame. */ + if(tc_pread(ipipe->fd_in, frame, 4) != 4) { + error = 1; + return; + } + + /* Read the rest of the frame. */ + size = frame[3] & 128 ? DV_PAL_FRAME_SIZE : DV_NTSC_FRAME_SIZE; + if (tc_pread(ipipe->fd_in, frame, size-4) != size-4) { + error = 1; + return; + } + } + + /* Read the right number of frames. */ + for(n=ipipe->frame_limit[0]; n<=ipipe->frame_limit[1]; ++n) { + /* The first 32 bits contain the flag for PAL or NTSC frame. */ + if(tc_pread(ipipe->fd_in, frame, 4)!=4) { + error = 1; + return; + } + + /* Read the rest of the frame. */ + size = frame[3] & 128 ? DV_PAL_FRAME_SIZE : DV_NTSC_FRAME_SIZE; + if(tc_pread(ipipe->fd_in, &frame[4], size-4)!=size-4) { + error = 1; + return; + } + + /* Write it out. */ + if(tc_pwrite(ipipe->fd_out, frame, size)!=size) { + error = 1; + return; + } + } + break; + } + } +} + |