www.pudn.com > avi 到 mpeg 的转换程序及源代码.zip > CONFORM.C
/* conform.c, conformance checks */
/* Copyright (C) 1996, MPEG Software Simulation Group. All Rights Reserved. */
/*
* Disclaimer of Warranty
*
* These software programs are available to the user without any license fee or
* royalty on an "as is" basis. The MPEG Software Simulation Group disclaims
* any and all warranties, whether express, implied, or statuary, including any
* implied warranties or merchantability or of fitness for a particular
* purpose. In no event shall the copyright-holder be liable for any
* incidental, punitive, or consequential damages of any kind whatsoever
* arising from the use of these programs.
*
* This disclaimer of warranty extends to the user of these programs and user's
* customers, employees, agents, transferees, successors, and assigns.
*
* The MPEG Software Simulation Group does not represent or warrant that the
* programs furnished hereunder are free of infringement of any third-party
* patents.
*
* Commercial implementations of MPEG-1 and MPEG-2 video, including shareware,
* are subject to royalty fees to patent holders. Many of these patents are
* general enough such that they are unavoidable regardless of implementation
* design.
*
*/
/*
* 4/4/97 - John Schlichther
*
* extensively altered to create avi2mpg1 - avi to mpeg-1 encoder
*
* Since avi file, and the avi subsystem are platform dependant, cross
* platform compatibility removed, many optional features disabled or
* removed, code generally trimmed to a minimum.
*
*/
#include
#include
#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 (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 (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 (aspectratio<1 || aspectratio>14)
error("pel_aspect_ratio must be between 1 and 14 (MPEG-1)");
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 (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 (vbv_buffer_size>=1024)
error("vbv_buffer_size must be less than 1024 (MPEG-1)");
if (chroma_formatCHROMA444)
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; i9)
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 (motion_data[i].forw_hor_f_code>7)
error("f_code must be le less than 8");
if (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 (motion_data[i].back_hor_f_code>7)
error("f_code must be le less than 8");
if (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 4