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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 "./original_pl_mpeg.h"
int
main(int argc, char *argv[]) {
unsigned frame_rate_code;
unsigned format_ves;
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;
}
format_ves = 0;
plm_set_audio_enabled(plm, FALSE);
if (!plm->video_decoder) {
format_ves = 1;
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);
if (plm_buffer_find_start_code(plm->video_decoder->buffer, PLM_START_SEQUENCE) == -1) {
printf("Error likely not an MPEG-1 video!\n");
plm_destroy(plm);
return 1;
}
plm_buffer_skip(plm->video_decoder->buffer, 12); //skip width
plm_buffer_skip(plm->video_decoder->buffer, 12); //skip height
plm_buffer_skip(plm->video_decoder->buffer, 4); //skip PAR
frame_rate_code = plm_buffer_read(plm->video_decoder->buffer, 4);
plm_destroy(plm);
if (frame_rate_code & 0x8) {
printf("Magical MPEG-1 %s asset detected. Frame rate code=0x%X\n", format_ves ? "ES" : "PS", frame_rate_code);
return 0;
}
else if (frame_rate_code == 0) {
printf("Bad MPEG-1 %s asset detected. Frame rate code=0x%X\n", format_ves ? "ES" : "PS", frame_rate_code);
}
else {
printf("Normal MPEG-1 %s asset detected. Frame rate code=0x%X\n", format_ves ? "ES" : "PS", frame_rate_code);
}
return 1;
}
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