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/*
* Copyright (C) 2022 Jon Dennis
*
* 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 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 <stdio.h>
#define PL_MPEG_IMPLEMENTATION
#include "../mpeg_decoder.h"
int
main(int argc, char *argv[]) {
unsigned result;
unsigned temporal_seqnum;
unsigned picture_type;
if (argc != 2) {
fprintf(stderr, "Usage: %s INPUT_FILE\n", argv[0]);
return 1;
}
plm_t *plm = plm_create_with_filename(argv[1]);
if (!plm) {
printf("Couldn't open file %s\n", argv[1]);
return 1;
}
plm_set_audio_enabled(plm, FALSE);
plm_set_loop(plm, FALSE);
if (!plm->video_decoder) {
if (plm->audio_decoder) {
plm_audio_destroy(plm->audio_decoder);
plm->audio_decoder = NULL;
}
plm_demux_rewind(plm->demux);
plm->has_decoders = TRUE;
plm->video_packet_type = PLM_DEMUX_PACKET_VIDEO_1;
if (plm->video_decoder) plm_video_destroy(plm->video_decoder);
plm->video_decoder = plm_video_create_with_buffer(plm->demux->buffer, FALSE);
}
plm_rewind(plm);
/* XXX read rate code here !!! */
if (plm_video_get_framerate(plm->video_decoder) != 0.000) {
printf("Error not a magical asset\n");
plm_destroy(plm);
return 1;
}
/* this is some mighty fine half-assery... */
result = 0;
do {
if (plm_buffer_find_start_code(plm->video_decoder->buffer, PLM_START_PICTURE) == -1) {
break;
}
temporal_seqnum = plm_buffer_read(plm->video_decoder->buffer, 10);
picture_type = plm_buffer_read(plm->video_decoder->buffer, 3);
if ((picture_type == PLM_VIDEO_PICTURE_TYPE_PREDICTIVE) || (picture_type == PLM_VIDEO_PICTURE_TYPE_B)) {
plm_buffer_skip(plm->video_decoder->buffer, 16); // skip vbv_delay
plm_buffer_skip(plm->video_decoder->buffer, 1); //skip full_px
result = plm_buffer_read(plm->video_decoder->buffer, 3); //forward f_code
if (plm_buffer_next_start_code(plm->video_decoder->buffer) == PLM_START_USER_DATA) {
/* The Horde */
if (temporal_seqnum != 4) result = 0;
}
else {
/* Return to Zork and Lord of the Rings */
if ((temporal_seqnum != 3) && (temporal_seqnum != 8)) result = 0;
}
}
} while (result == 0);
plm_rewind(plm);
plm_destroy(plm);
if (result) {
printf("Found f_code: %u\n", result);
return 0;
}
printf("Not Found\n");
return 1;
}
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