/* conform.c, 一致性檢測*/#include <stdio.h>#include <stdlib.h>#include "config.h"#include "global.h"/* check for (level independent) parameter limits */void range_checks(){  int i;  /* range and value checks */  if (horizontal_size<1 || horizontal_size>16383)    error("horizontal_size must be between 1 and 16383");  if (mpeg1 && horizontal_size>4095)    error("horizontal_size must be less than 4096 (MPEG-1)");  if ((horizontal_size&4095)==0)    error("horizontal_size must not be a multiple of 4096");  if (chroma_format!=CHROMA444 && horizontal_size%2 != 0)    error("horizontal_size must be a even (4:2:0 / 4:2:2)");  if (vertical_size<1 || vertical_size>16383)    error("vertical_size must be between 1 and 16383");  if (mpeg1 && vertical_size>4095)    error("vertical size must be less than 4096 (MPEG-1)");  if ((vertical_size&4095)==0)    error("vertical_size must not be a multiple of 4096");  if (chroma_format==CHROMA420 && vertical_size%2 != 0)    error("vertical_size must be a even (4:2:0)");  if(fieldpic)  {    if (vertical_size%2 != 0)      error("vertical_size must be a even (field pictures)");    if (chroma_format==CHROMA420 && vertical_size%4 != 0)      error("vertical_size must be a multiple of 4 (4:2:0 field pictures)");  }  if (mpeg1)  {    if (aspectratio<1 || aspectratio>14)      error("pel_aspect_ratio must be between 1 and 14 (MPEG-1)");  }  else  {    if (aspectratio<1 || aspectratio>4)      error("aspect_ratio_information must be 1, 2, 3 or 4");  }  if (frame_rate_code<1 || frame_rate_code>8)    error("frame_rate code must be between 1 and 8");  if (bit_rate<=0.0)    error("bit_rate must be positive");  if (bit_rate > ((1<<30)-1)*400.0)    error("bit_rate must be less than 429 Gbit/s");  if (mpeg1 && bit_rate > ((1<<18)-1)*400.0)    error("bit_rate must be less than 104 Mbit/s (MPEG-1)");  if (vbv_buffer_size<1 || vbv_buffer_size>0x3ffff)    error("vbv_buffer_size must be in range 1..(2^18-1)");  if (mpeg1 && vbv_buffer_size>=1024)    error("vbv_buffer_size must be less than 1024 (MPEG-1)");  if (chroma_format<CHROMA420 || chroma_format>CHROMA444)    error("chroma_format must be in range 1...3");  if (video_format<0 || video_format>4)    error("video_format must be in range 0...4");  if (color_primaries<1 || color_primaries>7 || color_primaries==3)    error("color_primaries must be in range 1...2 or 4...7");  if (transfer_characteristics<1 || transfer_characteristics>7      || transfer_characteristics==3)    error("transfer_characteristics must be in range 1...2 or 4...7");  if (matrix_coefficients<1 || matrix_coefficients>7 || matrix_coefficients==3)    error("matrix_coefficients must be in range 1...2 or 4...7");  if (display_horizontal_size<0 || display_horizontal_size>16383)    error("display_horizontal_size must be in range 0...16383");  if (display_vertical_size<0 || display_vertical_size>16383)    error("display_vertical_size must be in range 0...16383");  if (dc_prec<0 || dc_prec>3)    error("intra_dc_precision must be in range 0...3");  for (i=0; i<M; i++)  {    if (motion_data[i].forw_hor_f_code<1 || motion_data[i].forw_hor_f_code>9)      error("f_code must be between 1 and 9");    if (motion_data[i].forw_vert_f_code<1 || motion_data[i].forw_vert_f_code>9)      error("f_code must be between 1 and 9");    if (mpeg1 && motion_data[i].forw_hor_f_code>7)      error("f_code must be le less than 8");    if (mpeg1 && motion_data[i].forw_vert_f_code>7)      error("f_code must be le less than 8");    if (motion_data[i].sxf<=0)      error("search window must be positive"); /* doesn't belong here */    if (motion_data[i].syf<=0)      error("search window must be positive");    if (i!=0)    {      if (motion_data[i].back_hor_f_code<1 || motion_data[i].back_hor_f_code>9)        error("f_code must be between 1 and 9");      if (motion_data[i].back_vert_f_code<1 || motion_data[i].back_vert_f_code>9)        error("f_code must be between 1 and 9");      if (mpeg1 && motion_data[i].back_hor_f_code>7)        error("f_code must be le less than 8");      if (mpeg1 && motion_data[i].back_vert_f_code>7)        error("f_code must be le less than 8");      if (motion_data[i].sxb<=0)        error("search window must be positive");      if (motion_data[i].syb<=0)        error("search window must be positive");    }  }}/* identifies valid profile / level combinations */static char profile_level_defined[5][4] ={/* HL   H-14 ML   LL  */  {1,   1,   1,   0},  /* HP   */  {0,   1,   0,   0},  /* Spat */  {0,   0,   1,   1},  /* SNR  */  {1,   1,   1,   1},  /* MP   */  {0,   0,   1,   0}   /* SP   */};static struct level_limits {  int hor_f_code;  int vert_f_code;  int hor_size;  int vert_size;  int sample_rate;  int bit_rate; /* Mbit/s */  int vbv_buffer_size; /* 16384 bit steps */} maxval_tab[4] ={  {9, 5, 1920, 1152, 62668800, 80, 597}, /* HL */  {9, 5, 1440, 1152, 47001600, 60, 448}, /* H-14 */  {8, 5,  720,  576, 10368000, 15, 112}, /* ML */  {7, 4,  352,  288,  3041280,  4,  29}  /* LL */};#define SP   5#define MP   4#define SNR  3#define SPAT 2#define HP   1#define LL  10#define ML   8#define H14  6#define HL   4void profile_and_level_checks(){  int i;  struct level_limits *maxval;  if (profile<0 || profile>15)    error("profile must be between 0 and 15");  if (level<0 || level>15)    error("level must be between 0 and 15");  if (profile>=8)  {    if (!quiet)      fprintf(stderr,"Warning: profile uses a reserved value, conformance checks skipped\n");    return;  }  if (profile<HP || profile>SP)    error("undefined Profile");  if (profile==SNR || profile==SPAT)    error("This encoder currently generates no scalable bitstreams");  if (level<HL || level>LL || level&1)    error("undefined Level");  maxval = &maxval_tab[(level-4) >> 1];  /* check profile@level combination */  if(!profile_level_defined[profile-1][(level-4) >> 1])    error("undefined profile@level combination");    /* profile (syntax) constraints */  if (profile==SP && M!=1)    error("Simple Profile does not allow B pictures");  if (profile!=HP && chroma_format!=CHROMA420)    error("chroma format must be 4:2:0 in specified Profile");  if (profile==HP && chroma_format==CHROMA444)    error("chroma format must be 4:2:0 or 4:2:2 in High Profile");  if (profile>=MP) /* SP, MP: constrained repeat_first_field */  {    if (frame_rate_code<=2 && repeatfirst)      error("repeat_first_first must be zero");    if (frame_rate_code<=6 && prog_seq && repeatfirst)      error("repeat_first_first must be zero");  }  if (profile!=HP && dc_prec==3)    error("11 bit DC precision only allowed in High Profile");  /* level (parameter value) constraints */  /* Table 8-8 */  if (frame_rate_code>5 && level>=ML)    error("Picture rate greater than permitted in specified Level");  for (i=0; i<M; i++)  {    if (motion_data[i].forw_hor_f_code > maxval->hor_f_code)      error("forward horizontal f_code greater than permitted in specified Level");    if (motion_data[i].forw_vert_f_code > maxval->vert_f_code)      error("forward vertical f_code greater than permitted in specified Level");    if (i!=0)    {      if (motion_data[i].back_hor_f_code > maxval->hor_f_code)        error("backward horizontal f_code greater than permitted in specified Level");        if (motion_data[i].back_vert_f_code > maxval->vert_f_code)        error("backward vertical f_code greater than permitted in specified Level");    }  }  /* Table 8-10 */  if (horizontal_size > maxval->hor_size)    error("Horizontal size is greater than permitted in specified Level");  if (vertical_size > maxval->vert_size)    error("Horizontal size is greater than permitted in specified Level");  /* Table 8-11 */  if (horizontal_size*vertical_size*frame_rate > maxval->sample_rate)    error("Sample rate is greater than permitted in specified Level");  /* Table 8-12 */  if (bit_rate> 1.0e6 * maxval->bit_rate)    error("Bit rate is greater than permitted in specified Level");  /* Table 8-13 */  if (vbv_buffer_size > maxval->vbv_buffer_size)    error("vbv_buffer_size exceeds High Level limit");}