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authorMichele Calgaro <michele.calgaro@yahoo.it>2020-09-11 14:38:47 +0900
committerMichele Calgaro <michele.calgaro@yahoo.it>2020-09-11 14:38:47 +0900
commit884c8093d63402a1ad0b502244b791e3c6782be3 (patch)
treea600d4ab0d431a2bdfe4c15b70df43c14fbd8dd0 /debian/transcode/transcode-1.1.7/import/extract_mpeg2.c
parent14e1aa2006796f147f3f4811fb908a6b01e79253 (diff)
downloadextra-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.c221
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);
+
+}