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Full Discussion: Extract sequences of bytes from binary for differents blocks
Top Forums Shell Programming and Scripting Extract sequences of bytes from binary for differents blocks Post 302846535 by Ophiuchus on Saturday 24th of August 2013 12:54:53 PM
Old 08-24-2013
Hello ahamed!

I'm trying to avoid printing the "f's" that are printing for the fields
in red below, but for now is secondary that issue:
Code:
void print_data(const unsigned char *ptr, int len, block bl)
{
        int i;
        if(MAIN_BLOCK == bl){
                print_bytes(ptr, 1);
                print_bytes(ptr+1, 3);
                print_bytes(ptr+4, 8);
                print_bytes(ptr+12, 8);
        } else {
                print_bytes(ptr, 1);
                print_bytes(ptr+1, 1);
                print_bytes(ptr+2, 1);
                print_bytes(ptr+3, 1);
                print_bytes(ptr+4, 4);
                print_bytes(ptr+8, 8);
                print_bytes(ptr+16, 1);
                if(*ptr == intrim_pat1[2][1]){
                        print_bytes(ptr+17, 1);
                }
        }
        return;
}

If you want, better please help me in extract the last sequences of interest to me and is at the end of the sub-block and begins with 84 0e, where 0e is the length, so is needed to extract the 84 and the next 14 bytes after 0e, separating each byte by "|". As is part of the same block, print as before in the same line.

I'm attaching and image showing in red the bytes I mention.

I've added 0x03, 0x84 at the end of the intrim_pat1, and it seems is pending add some other code.
Code:
static unsigned char intrim_pat1[][2] = { {0x03, 0x80}, {0x03, 0x81}, {0x03, 0x83}, {0x03, 0x86}, {0x03, 0x87},{0x03,0x84} };

PD: 84 0E will appear at the end of sub-block, won't appear after 0x03, but I've added in intrim_pat1 because is the way I see possible to do it for me.

Thanks in advance.
Extract sequences of bytes from binary for differents blocks-image2jpg
 

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LEARN ABOUT OPENSOLARIS

sdl_audiocvt

SDL_AudioCVT(3) 						 SDL API Reference						   SDL_AudioCVT(3)

NAME

       SDL_AudioCVT - Audio Conversion Structure

STRUCTURE DEFINITION

       typedef struct{
	 int needed;
	 Uint16 src_format;
	 Uint16 dest_format;
	 double rate_incr;
	 Uint8 *buf;
	 int len;
	 int len_cvt;
	 int len_mult;
	 double len_ratio;
	 void (*filters[10])(struct SDL_AudioCVT *cvt, Uint16 format);
	 int filter_index;
       } SDL_AudioCVT;

STRUCTURE DATA

       needed		   Set to one if the conversion is possible

       src_format	   Audio format of the source

       dest_format	   Audio format of the destination

       rate_incr	   Rate conversion increment

       buf		   Audio buffer

       len		   Length of the original audio buffer in bytes

       len_cvt		   Length of converted audio buffer in bytes (calculated)

       len_mult 	   buf must be len*len_mult bytes in size(calculated)

       len_ratio	   Final audio size is len*len_ratio

       filters[10](..)	   Pointers to functions needed for this conversion

       filter_index	   Current conversion function

DESCRIPTION

       The  SDL_AudioCVT  is  used to convert audio data between different formats. A SDL_AudioCVT structure is created with the SDL_BuildAudioCVT
       function, while the actual conversion is done by the SDL_ConvertAudio function.

       Many of the fields in the SDL_AudioCVT structure should be considered private and their function will not be discussed here.

       Uint8 *buf

       int len

       int len_mult

       double len_ratio

SEE ALSO

       SDL_BuildAudioCVT, SDL_ConvertAudio, SDL_AudioSpec

SDL
							      Tue 11 Sep 2001, 22:58						   SDL_AudioCVT(3)
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