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/* conform.c, conformance checks */
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/* Copyright (C) 1996, MPEG Software Simulation Group. All Rights Reserved. */
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* Disclaimer of Warranty
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* These software programs are available to the user without any license fee or
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* royalty on an "as is" basis. The MPEG Software Simulation Group disclaims
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* any and all warranties, whether express, implied, or statuary, including any
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* implied warranties or merchantability or of fitness for a particular
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* purpose. In no event shall the copyright-holder be liable for any
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* incidental, punitive, or consequential damages of any kind whatsoever
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* arising from the use of these programs.
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* This disclaimer of warranty extends to the user of these programs and user's
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* customers, employees, agents, transferees, successors, and assigns.
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* The MPEG Software Simulation Group does not represent or warrant that the
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* programs furnished hereunder are free of infringement of any third-party
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* Commercial implementations of MPEG-1 and MPEG-2 video, including shareware,
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* are subject to royalty fees to patent holders. Many of these patents are
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* general enough such that they are unavoidable regardless of implementation
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#include "mpeg2enc_config.h"
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#include "mpeg2enc_global.h"
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/* check for (level independent) parameter limits */
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VTK_MPEG2ENC_EXPORT void MPEG2_range_checks(mpeg2_struct)
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struct MPEG2_structure *mpeg2_struct;
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/* range and value checks */
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if (mpeg2_struct->horizontal_size<1 || mpeg2_struct->horizontal_size>16383)
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(*(mpeg2_struct->report_error))("horizontal_size must be between 1 and 16383");
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if (mpeg2_struct->mpeg1 && mpeg2_struct->horizontal_size>4095)
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(*(mpeg2_struct->report_error))("horizontal_size must be less than 4096 (MPEG-1)");
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if ((mpeg2_struct->horizontal_size&4095)==0)
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(*(mpeg2_struct->report_error))("horizontal_size must not be a multiple of 4096");
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if (mpeg2_struct->chroma_format!=CHROMA444 && mpeg2_struct->horizontal_size%2 != 0)
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(*(mpeg2_struct->report_error))("horizontal_size must be a even (4:2:0 / 4:2:2)");
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if (mpeg2_struct->vertical_size<1 || mpeg2_struct->vertical_size>16383)
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(*(mpeg2_struct->report_error))("vertical_size must be between 1 and 16383");
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if (mpeg2_struct->mpeg1 && mpeg2_struct->vertical_size>4095)
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(*(mpeg2_struct->report_error))("vertical size must be less than 4096 (MPEG-1)");
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if ((mpeg2_struct->vertical_size&4095)==0)
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(*(mpeg2_struct->report_error))("vertical_size must not be a multiple of 4096");
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if (mpeg2_struct->chroma_format==CHROMA420 && mpeg2_struct->vertical_size%2 != 0)
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(*(mpeg2_struct->report_error))("vertical_size must be a even (4:2:0)");
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if(mpeg2_struct->fieldpic)
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if (mpeg2_struct->vertical_size%2 != 0)
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(*(mpeg2_struct->report_error))("vertical_size must be a even (field pictures)");
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if (mpeg2_struct->chroma_format==CHROMA420 && mpeg2_struct->vertical_size%4 != 0)
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(*(mpeg2_struct->report_error))("vertical_size must be a multiple of 4 (4:2:0 field pictures)");
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if (mpeg2_struct->mpeg1)
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if (mpeg2_struct->aspectratio<1 || mpeg2_struct->aspectratio>14)
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(*(mpeg2_struct->report_error))("pel_aspect_ratio must be between 1 and 14 (MPEG-1)");
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if (mpeg2_struct->aspectratio<1 || mpeg2_struct->aspectratio>4)
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(*(mpeg2_struct->report_error))("aspect_ratio_information must be 1, 2, 3 or 4");
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if (mpeg2_struct->frame_rate_code<1 || mpeg2_struct->frame_rate_code>8)
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(*(mpeg2_struct->report_error))("frame_rate code must be between 1 and 8");
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if (mpeg2_struct->bit_rate<=0.0)
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(*(mpeg2_struct->report_error))("bit_rate must be positive");
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if (mpeg2_struct->bit_rate > ((1<<30)-1)*400.0)
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(*(mpeg2_struct->report_error))("bit_rate must be less than 429 Gbit/s");
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if (mpeg2_struct->mpeg1 && mpeg2_struct->bit_rate > ((1<<18)-1)*400.0)
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(*(mpeg2_struct->report_error))("bit_rate must be less than 104 Mbit/s (MPEG-1)");
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if (mpeg2_struct->vbv_buffer_size<1 || mpeg2_struct->vbv_buffer_size>0x3ffff)
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(*(mpeg2_struct->report_error))("vbv_buffer_size must be in range 1..(2^18-1)");
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if (mpeg2_struct->mpeg1 && mpeg2_struct->vbv_buffer_size>=1024)
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(*(mpeg2_struct->report_error))("vbv_buffer_size must be less than 1024 (MPEG-1)");
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if (mpeg2_struct->chroma_format<CHROMA420 || mpeg2_struct->chroma_format>CHROMA444)
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(*(mpeg2_struct->report_error))("chroma_format must be in range 1...3");
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if (mpeg2_struct->video_format<0 || mpeg2_struct->video_format>4)
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(*(mpeg2_struct->report_error))("video_format must be in range 0...4");
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if (mpeg2_struct->color_primaries<1 || mpeg2_struct->color_primaries>7 || mpeg2_struct->color_primaries==3)
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(*(mpeg2_struct->report_error))("color_primaries must be in range 1...2 or 4...7");
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if (mpeg2_struct->transfer_characteristics<1 || mpeg2_struct->transfer_characteristics>7
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|| mpeg2_struct->transfer_characteristics==3)
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(*(mpeg2_struct->report_error))("transfer_characteristics must be in range 1...2 or 4...7");
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if (mpeg2_struct->matrix_coefficients<1 || mpeg2_struct->matrix_coefficients>7 || mpeg2_struct->matrix_coefficients==3)
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(*(mpeg2_struct->report_error))("matrix_coefficients must be in range 1...2 or 4...7");
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if (mpeg2_struct->display_horizontal_size<0 || mpeg2_struct->display_horizontal_size>16383)
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(*(mpeg2_struct->report_error))("display_horizontal_size must be in range 0...16383");
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if (mpeg2_struct->display_vertical_size<0 || mpeg2_struct->display_vertical_size>16383)
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(*(mpeg2_struct->report_error))("display_vertical_size must be in range 0...16383");
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if (mpeg2_struct->dc_prec<0 || mpeg2_struct->dc_prec>3)
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(*(mpeg2_struct->report_error))("intra_dc_precision must be in range 0...3");
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for (i=0; i<mpeg2_struct->M_val; i++)
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if (mpeg2_struct->motion_data[i].forw_hor_f_code<1 || mpeg2_struct->motion_data[i].forw_hor_f_code>9)
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(*(mpeg2_struct->report_error))("f_code must be between 1 and 9");
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if (mpeg2_struct->motion_data[i].forw_vert_f_code<1 || mpeg2_struct->motion_data[i].forw_vert_f_code>9)
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(*(mpeg2_struct->report_error))("f_code must be between 1 and 9");
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if (mpeg2_struct->mpeg1 && mpeg2_struct->motion_data[i].forw_hor_f_code>7)
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(*(mpeg2_struct->report_error))("f_code must be le less than 8");
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if (mpeg2_struct->mpeg1 && mpeg2_struct->motion_data[i].forw_vert_f_code>7)
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(*(mpeg2_struct->report_error))("f_code must be le less than 8");
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if (mpeg2_struct->motion_data[i].sxf<=0)
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(*(mpeg2_struct->report_error))("search window must be positive"); /* doesn't belong here */
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if (mpeg2_struct->motion_data[i].syf<=0)
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(*(mpeg2_struct->report_error))("search window must be positive");
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if (mpeg2_struct->motion_data[i].back_hor_f_code<1 || mpeg2_struct->motion_data[i].back_hor_f_code>9)
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(*(mpeg2_struct->report_error))("f_code must be between 1 and 9");
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if (mpeg2_struct->motion_data[i].back_vert_f_code<1 || mpeg2_struct->motion_data[i].back_vert_f_code>9)
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(*(mpeg2_struct->report_error))("f_code must be between 1 and 9");
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if (mpeg2_struct->mpeg1 && mpeg2_struct->motion_data[i].back_hor_f_code>7)
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(*(mpeg2_struct->report_error))("f_code must be le less than 8");
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if (mpeg2_struct->mpeg1 && mpeg2_struct->motion_data[i].back_vert_f_code>7)
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(*(mpeg2_struct->report_error))("f_code must be le less than 8");
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if (mpeg2_struct->motion_data[i].sxb<=0)
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(*(mpeg2_struct->report_error))("search window must be positive");
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if (mpeg2_struct->motion_data[i].syb<=0)
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(*(mpeg2_struct->report_error))("search window must be positive");
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/* identifies valid profile / level combinations */
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static char profile_level_defined[5][4] =
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{1, 1, 1, 0}, /* HP */
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{0, 1, 0, 0}, /* Spat */
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{0, 0, 1, 1}, /* SNR */
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{1, 1, 1, 1}, /* MP */
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{0, 0, 1, 0} /* SP */
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static struct level_limits {
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int bit_rate; /* Mbit/s */
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int vbv_buffer_size; /* 16384 bit steps */
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{9, 5, 1920, 1152, 62668800, 80, 597}, /* HL */
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{9, 5, 1440, 1152, 47001600, 60, 448}, /* H-14 */
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{8, 5, 720, 576, 10368000, 15, 112}, /* ML */
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{7, 4, 352, 288, 3041280, 4, 29} /* LL */
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VTK_MPEG2ENC_EXPORT void MPEG2_profile_and_level_checks(mpeg2_struct)
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struct MPEG2_structure *mpeg2_struct;
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struct level_limits *maxval;
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if (mpeg2_struct->profile<0 || mpeg2_struct->profile>15)
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(*(mpeg2_struct->report_error))("profile must be between 0 and 15");
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if (mpeg2_struct->level<0 || mpeg2_struct->level>15)
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(*(mpeg2_struct->report_error))("level must be between 0 and 15");
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if (mpeg2_struct->profile>=8)
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if (!mpeg2_struct->quiet)
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fprintf(stderr,"Warning: profile uses a reserved value, conformance checks skipped\n");
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if (mpeg2_struct->profile<HP || mpeg2_struct->profile>SP)
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(*(mpeg2_struct->report_error))("undefined Profile");
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if (mpeg2_struct->profile==SNR || mpeg2_struct->profile==SPAT)
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(*(mpeg2_struct->report_error))("This encoder currently generates no scalable bitstreams");
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if (mpeg2_struct->level<HL || mpeg2_struct->level>LL || mpeg2_struct->level&1)
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(*(mpeg2_struct->report_error))("undefined Level");
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maxval = &maxval_tab[(mpeg2_struct->level-4) >> 1];
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/* check profile@level combination */
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if(!profile_level_defined[mpeg2_struct->profile-1][(mpeg2_struct->level-4) >> 1])
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(*(mpeg2_struct->report_error))("undefined profile@level combination");
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/* profile (syntax) constraints */
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if (mpeg2_struct->profile==SP && mpeg2_struct->M_val!=1)
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(*(mpeg2_struct->report_error))("Simple Profile does not allow B pictures");
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if (mpeg2_struct->profile!=HP && mpeg2_struct->chroma_format!=CHROMA420)
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(*(mpeg2_struct->report_error))("chroma format must be 4:2:0 in specified Profile");
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if (mpeg2_struct->profile==HP && mpeg2_struct->chroma_format==CHROMA444)
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(*(mpeg2_struct->report_error))("chroma format must be 4:2:0 or 4:2:2 in High Profile");
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if (mpeg2_struct->profile>=MP) /* SP, MP: constrained repeat_first_field */
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if (mpeg2_struct->frame_rate_code<=2 && mpeg2_struct->repeatfirst)
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(*(mpeg2_struct->report_error))("repeat_first_first must be zero");
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if (mpeg2_struct->frame_rate_code<=6 && mpeg2_struct->prog_seq && mpeg2_struct->repeatfirst)
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(*(mpeg2_struct->report_error))("repeat_first_first must be zero");
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if (mpeg2_struct->profile!=HP && mpeg2_struct->dc_prec==3)
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(*(mpeg2_struct->report_error))("11 bit DC precision only allowed in High Profile");
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/* level (parameter value) constraints */
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if (mpeg2_struct->frame_rate_code>5 && mpeg2_struct->level>=ML)
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(*(mpeg2_struct->report_error))("Picture rate greater than permitted in specified Level");
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for (i=0; i<mpeg2_struct->M_val; i++)
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if (mpeg2_struct->motion_data[i].forw_hor_f_code > maxval->hor_f_code)
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(*(mpeg2_struct->report_error))("forward horizontal f_code greater than permitted in specified Level");
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if (mpeg2_struct->motion_data[i].forw_vert_f_code > maxval->vert_f_code)
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(*(mpeg2_struct->report_error))("forward vertical f_code greater than permitted in specified Level");
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if (mpeg2_struct->motion_data[i].back_hor_f_code > maxval->hor_f_code)
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(*(mpeg2_struct->report_error))("backward horizontal f_code greater than permitted in specified Level");
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if (mpeg2_struct->motion_data[i].back_vert_f_code > maxval->vert_f_code)
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(*(mpeg2_struct->report_error))("backward vertical f_code greater than permitted in specified Level");
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if (mpeg2_struct->horizontal_size > maxval->hor_size)
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(*(mpeg2_struct->report_error))("Horizontal size is greater than permitted in specified Level");
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if (mpeg2_struct->vertical_size > maxval->vert_size)
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(*(mpeg2_struct->report_error))("Horizontal size is greater than permitted in specified Level");
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if (mpeg2_struct->horizontal_size*mpeg2_struct->vertical_size*mpeg2_struct->frame_rate > maxval->sample_rate)
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(*(mpeg2_struct->report_error))("Sample rate is greater than permitted in specified Level");
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if (mpeg2_struct->bit_rate> 1.0e6 * maxval->bit_rate)
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(*(mpeg2_struct->report_error))("Bit rate is greater than permitted in specified Level");
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if (mpeg2_struct->vbv_buffer_size > maxval->vbv_buffer_size)
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(*(mpeg2_struct->report_error))("vbv_buffer_size exceeds High Level limit");
added
removed
Utilities/vtkmpeg2encode/conform.c
