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Diffstat (limited to 'libmpeg2/stats.c')
| -rw-r--r-- | libmpeg2/stats.c | 316 |
1 files changed, 316 insertions, 0 deletions
diff --git a/libmpeg2/stats.c b/libmpeg2/stats.c new file mode 100644 index 0000000000..b342bef7a2 --- /dev/null +++ b/libmpeg2/stats.c @@ -0,0 +1,316 @@ +/* + * stats.c + * Copyright (C) 1999-2000 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: + //stats_extension (buffer); + 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); + } +} |