mpv/libmpeg2/stats.c

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/*
* stats.c
* Copyright (C) 1999-2001 Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
*
* This file is part of mpeg2dec, a free MPEG-2 video stream decoder.
*
* mpeg2dec 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.
*
* mpeg2dec 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 "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <inttypes.h>
#include "mpeg2_internal.h"
static int debug_level = -1;
/* Determine is debug output is required. */
/* We could potentially have multiple levels of debug info */
static int debug_is_on (void)
{
char * env_var;
if (debug_level < 0) {
env_var = getenv ("MPEG2_DEBUG");
if (env_var)
debug_level = 1;
else
debug_level = 0;
}
return debug_level;
}
static void stats_picture (uint8_t * buffer)
{
static char * picture_coding_type_str [8] = {
"Invalid picture type",
"I-type",
"P-type",
"B-type",
"D (very bad)",
"Invalid","Invalid","Invalid"
};
int picture_coding_type;
int temporal_reference;
int vbv_delay;
temporal_reference = (buffer[0] << 2) | (buffer[1] >> 6);
picture_coding_type = (buffer [1] >> 3) & 7;
vbv_delay = ((buffer[1] << 13) | (buffer[2] << 5) |
(buffer[3] >> 3)) & 0xffff;
fprintf (stderr, " (picture) %s temporal_reference %d, vbv_delay %d\n",
picture_coding_type_str [picture_coding_type],
temporal_reference, vbv_delay);
}
static void stats_user_data (uint8_t * buffer)
{
fprintf (stderr, " (user_data)\n");
}
static void stats_sequence (uint8_t * buffer)
{
static char * aspect_ratio_information_str[8] = {
"Invalid Aspect Ratio",
"1:1",
"4:3",
"16:9",
"2.21:1",
"Invalid Aspect Ratio",
"Invalid Aspect Ratio",
"Invalid Aspect Ratio"
};
static char * frame_rate_str[16] = {
"Invalid frame_rate_code",
"23.976", "24", "25" , "29.97",
"30" , "50", "59.94", "60" ,
"Invalid frame_rate_code", "Invalid frame_rate_code",
"Invalid frame_rate_code", "Invalid frame_rate_code",
"Invalid frame_rate_code", "Invalid frame_rate_code",
"Invalid frame_rate_code"
};
int horizontal_size;
int vertical_size;
int aspect_ratio_information;
int frame_rate_code;
int bit_rate_value;
int vbv_buffer_size_value;
int constrained_parameters_flag;
int load_intra_quantizer_matrix;
int load_non_intra_quantizer_matrix;
vertical_size = (buffer[0] << 16) | (buffer[1] << 8) | buffer[2];
horizontal_size = vertical_size >> 12;
vertical_size &= 0xfff;
aspect_ratio_information = buffer[3] >> 4;
frame_rate_code = buffer[3] & 15;
bit_rate_value = (buffer[4] << 10) | (buffer[5] << 2) | (buffer[6] >> 6);
vbv_buffer_size_value = ((buffer[6] << 5) | (buffer[7] >> 3)) & 0x3ff;
constrained_parameters_flag = buffer[7] & 4;
load_intra_quantizer_matrix = buffer[7] & 2;
if (load_intra_quantizer_matrix)
buffer += 64;
load_non_intra_quantizer_matrix = buffer[7] & 1;
fprintf (stderr, " (seq) %dx%d %s, %s fps, %5.0f kbps, VBV %d kB%s%s%s\n",
horizontal_size, vertical_size,
aspect_ratio_information_str [aspect_ratio_information],
frame_rate_str [frame_rate_code],
bit_rate_value * 400.0 / 1000.0,
2 * vbv_buffer_size_value,
constrained_parameters_flag ? " , CP":"",
load_intra_quantizer_matrix ? " , Custom Intra Matrix":"",
load_non_intra_quantizer_matrix ? " , Custom Non-Intra Matrix":"");
}
static void stats_sequence_error (uint8_t * buffer)
{
fprintf (stderr, " (sequence_error)\n");
}
static void stats_sequence_end (uint8_t * buffer)
{
fprintf (stderr, " (sequence_end)\n");
}
static void stats_group (uint8_t * buffer)
{
fprintf (stderr, " (group)%s%s\n",
(buffer[4] & 0x40) ? " closed_gop" : "",
(buffer[4] & 0x20) ? " broken_link" : "");
}
static void stats_slice (uint8_t code, uint8_t * buffer)
{
/* fprintf (stderr, " (slice %d)\n", code); */
}
static void stats_sequence_extension (uint8_t * buffer)
{
static char * chroma_format_str[4] = {
"Invalid Chroma Format",
"4:2:0 Chroma",
"4:2:2 Chroma",
"4:4:4 Chroma"
};
int progressive_sequence;
int chroma_format;
progressive_sequence = (buffer[1] >> 3) & 1;
chroma_format = (buffer[1] >> 1) & 3;
fprintf (stderr, " (seq_ext) progressive_sequence %d, %s\n",
progressive_sequence, chroma_format_str [chroma_format]);
}
static void stats_sequence_display_extension (uint8_t * buffer)
{
fprintf (stderr, " (sequence_display_extension)\n");
}
static void stats_quant_matrix_extension (uint8_t * buffer)
{
fprintf (stderr, " (quant_matrix_extension)\n");
}
static void stats_copyright_extension (uint8_t * buffer)
{
fprintf (stderr, " (copyright_extension)\n");
}
static void stats_sequence_scalable_extension (uint8_t * buffer)
{
fprintf (stderr, " (sequence_scalable_extension)\n");
}
static void stats_picture_display_extension (uint8_t * buffer)
{
fprintf (stderr, " (picture_display_extension)\n");
}
static void stats_picture_coding_extension (uint8_t * buffer)
{
static char * picture_structure_str[4] = {
"Invalid Picture Structure",
"Top field",
"Bottom field",
"Frame Picture"
};
int f_code[2][2];
int intra_dc_precision;
int picture_structure;
int top_field_first;
int frame_pred_frame_dct;
int concealment_motion_vectors;
int q_scale_type;
int intra_vlc_format;
int alternate_scan;
int repeat_first_field;
int progressive_frame;
f_code[0][0] = buffer[0] & 15;
f_code[0][1] = buffer[1] >> 4;
f_code[1][0] = buffer[1] & 15;
f_code[1][1] = buffer[2] >> 4;
intra_dc_precision = (buffer[2] >> 2) & 3;
picture_structure = buffer[2] & 3;
top_field_first = buffer[3] >> 7;
frame_pred_frame_dct = (buffer[3] >> 6) & 1;
concealment_motion_vectors = (buffer[3] >> 5) & 1;
q_scale_type = (buffer[3] >> 4) & 1;
intra_vlc_format = (buffer[3] >> 3) & 1;
alternate_scan = (buffer[3] >> 2) & 1;
repeat_first_field = (buffer[3] >> 1) & 1;
progressive_frame = buffer[4] >> 7;
fprintf (stderr,
" (pic_ext) %s\n", picture_structure_str [picture_structure]);
fprintf (stderr,
" (pic_ext) forward horizontal f_code % d, forward vertical f_code % d\n",
f_code[0][0], f_code[0][1]);
fprintf (stderr,
" (pic_ext) backward horizontal f_code % d, backward vertical f_code % d\n",
f_code[1][0], f_code[1][1]);
fprintf (stderr,
" (pic_ext) intra_dc_precision %d, top_field_first %d, frame_pred_frame_dct %d\n",
intra_dc_precision, top_field_first, frame_pred_frame_dct);
fprintf (stderr,
" (pic_ext) concealment_motion_vectors %d, q_scale_type %d, intra_vlc_format %d\n",
concealment_motion_vectors, q_scale_type, intra_vlc_format);
fprintf (stderr,
" (pic_ext) alternate_scan %d, repeat_first_field %d, progressive_frame %d\n",
alternate_scan, repeat_first_field, progressive_frame);
}
void stats_header (uint8_t code, uint8_t * buffer)
{
if (! (debug_is_on ()))
return;
switch (code) {
case 0x00:
stats_picture (buffer);
break;
case 0xb2:
stats_user_data (buffer);
break;
case 0xb3:
stats_sequence (buffer);
break;
case 0xb4:
stats_sequence_error (buffer);
break;
case 0xb5:
switch (buffer[0] >> 4) {
case 1:
stats_sequence_extension (buffer);
break;
case 2:
stats_sequence_display_extension (buffer);
break;
case 3:
stats_quant_matrix_extension (buffer);
break;
case 4:
stats_copyright_extension (buffer);
break;
case 5:
stats_sequence_scalable_extension (buffer);
break;
case 7:
stats_picture_display_extension (buffer);
break;
case 8:
stats_picture_coding_extension (buffer);
break;
default:
fprintf (stderr, " (unknown extension %#x)\n", buffer[0] >> 4);
}
break;
case 0xb7:
stats_sequence_end (buffer);
break;
case 0xb8:
stats_group (buffer);
break;
default:
if (code < 0xb0)
stats_slice (code, buffer);
else
fprintf (stderr, " (unknown start code %#02x)\n", code);
}
}