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| author | Michele Calgaro <michele.calgaro@yahoo.it> | 2020-09-11 14:38:47 +0900 |
|---|---|---|
| committer | Michele Calgaro <michele.calgaro@yahoo.it> | 2020-09-11 14:38:47 +0900 |
| commit | 884c8093d63402a1ad0b502244b791e3c6782be3 (patch) | |
| tree | a600d4ab0d431a2bdfe4c15b70df43c14fbd8dd0 /debian/transcode/transcode-1.1.7/import/extract_mpeg2.c | |
| parent | 14e1aa2006796f147f3f4811fb908a6b01e79253 (diff) | |
| download | extra-dependencies-884c8093d63402a1ad0b502244b791e3c6782be3.tar.gz extra-dependencies-884c8093d63402a1ad0b502244b791e3c6782be3.zip | |
Added debian extra dependency packages.
Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>
Diffstat (limited to 'debian/transcode/transcode-1.1.7/import/extract_mpeg2.c')
| -rw-r--r-- | debian/transcode/transcode-1.1.7/import/extract_mpeg2.c | 221 |
1 files changed, 221 insertions, 0 deletions
diff --git a/debian/transcode/transcode-1.1.7/import/extract_mpeg2.c b/debian/transcode/transcode-1.1.7/import/extract_mpeg2.c new file mode 100644 index 00000000..dabfa533 --- /dev/null +++ b/debian/transcode/transcode-1.1.7/import/extract_mpeg2.c @@ -0,0 +1,221 @@ +/* + * extract_mpeg2.c + * + * Copyright (C) Thomas Oestreich - June 2001 + * Copyright (C) 1999-2001 Aaron Holtzman <aholtzma@ess.engr.uvic.ca> + * + * 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" + +#define BUFFER_SIZE 262144 +static uint8_t buffer[BUFFER_SIZE]; +static FILE *in_file, *out_file; + + +static void ps_loop (void) +{ + static int mpeg1_skip_table[16] = { + 1, 0xffff, 5, 10, 0xffff, 0xffff, 0xffff, 0xffff, + 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff + }; + + uint8_t * buf; + uint8_t * end; + uint8_t * tmp1=NULL; + uint8_t * tmp2=NULL; + int complain_loudly; + + complain_loudly = 1; + buf = buffer; + + do { + end = buf + fread (buf, 1, buffer + BUFFER_SIZE - buf, in_file); + buf = buffer; + + //scan buffer + while (buf + 4 <= end) { + + // check for valid start code + if (buf[0] || buf[1] || (buf[2] != 0x01)) { + if (complain_loudly) { + tc_log_warn(__FILE__, "missing start code at %#lx", + ftell (in_file) - (end - buf)); + if ((buf[0] == 0) && (buf[1] == 0) && (buf[2] == 0)) + tc_log_warn(__FILE__, "incorrect zero-byte padding detected - ignored"); + complain_loudly = 0; + } + buf++; + continue; + }// check for valid start code + + + switch (buf[3]) { + + case 0xb9: /* program end code */ + return; + + case 0xba: /* pack header */ + + /* skip */ + if ((buf[4] & 0xc0) == 0x40) /* mpeg2 */ + tmp1 = buf + 14 + (buf[13] & 7); + else if ((buf[4] & 0xf0) == 0x20) /* mpeg1 */ + tmp1 = buf + 12; + else if (buf + 5 > end) + goto copy; + else { + tc_log_error(__FILE__, "weird pack header"); + import_exit(1); + } + + if (tmp1 > end) + goto copy; + buf = tmp1; + break; + + /* video stream code: 1110???? */ + case 0xe0: /* video */ + case 0xe1: /* video */ + case 0xe2: /* video */ + case 0xe3: /* video */ + case 0xe4: /* video */ + case 0xe5: /* video */ + case 0xe6: /* video */ + case 0xe7: /* video */ + case 0xe8: /* video */ + case 0xe9: /* video */ + case 0xea: /* video */ + case 0xeb: /* video */ + case 0xec: /* video */ + case 0xed: /* video */ + case 0xee: /* video */ + case 0xef: /* video */ + + tmp2 = buf + 6 + (buf[4] << 8) + buf[5]; + if (tmp2 > end) + goto copy; + if ((buf[6] & 0xc0) == 0x80) /* mpeg2 */ + tmp1 = buf + 9 + buf[8]; + else { /* mpeg1 */ + for (tmp1 = buf + 6; *tmp1 == 0xff; tmp1++) + if (tmp1 == buf + 6 + 16) { + tc_log_warn(__FILE__, "too much stuffing"); + buf = tmp2; + break; + } + if ((*tmp1 & 0xc0) == 0x40) + tmp1 += 2; + tmp1 += mpeg1_skip_table [*tmp1 >> 4]; + } + + if (tmp1 < tmp2) { + TC_PIPE_WRITE(fileno(out_file), tmp1, tmp2-tmp1); + /* yeah, I know that's ugly -- FR */ + } + buf = tmp2; + break; + + default: + if (buf[3] < 0xb9) + tc_log_warn(__FILE__, "broken stream - skipping data"); + + /* skip */ + tmp1 = buf + 6 + (buf[4] << 8) + buf[5]; + if (tmp1 > end) + goto copy; + buf = tmp1; + break; + + } //start code selection + } //scan buffer + + if (buf < end) { + copy: + /* we only pass here for mpeg1 ps streams */ + memmove (buffer, buf, end - buf); + } + buf = buffer + (end - buf); + + } while (end == buffer + BUFFER_SIZE); +} + + +/* ------------------------------------------------------------ + * + * mpeg2 extract thread + * + * magic: TC_MAGIC_VOB + * TC_MAGIC_RAW <-- default + * TC_MAGIC_M2V + * TC_MAGIC_CDXA + * + * ------------------------------------------------------------*/ + + +void extract_mpeg2(info_t *ipipe) +{ + + int error=0; + + verbose = ipipe->verbose; + + switch(ipipe->magic) { + + case TC_MAGIC_VOB: + + in_file = fdopen(ipipe->fd_in, "r"); + out_file = fdopen(ipipe->fd_out, "w"); + + ps_loop(); + + fclose(in_file); + fclose(out_file); + + break; + + case TC_MAGIC_CDXA: + + AVI_dump(ipipe->name, 2); + + break; + + case TC_MAGIC_M2V: + case TC_MAGIC_RAW: + default: + + if(ipipe->magic == TC_MAGIC_UNKNOWN) + tc_log_warn(__FILE__, "no file type specified, assuming %s", + filetype(TC_MAGIC_RAW)); + + + error=tc_preadwrite(ipipe->fd_in, ipipe->fd_out); + + break; + } + + import_exit(error); + +} |
