69 lines
2.2 KiB
C++
69 lines
2.2 KiB
C++
#include <unistd.h> //for read()
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struct FLV_Pack {
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int len;
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int buf;
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char * data;
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};//FLV_Pack
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char FLVHeader[13];
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//reads full length from a file descriptor
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void Magic_Read(char * buf, int len, int file){
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int i = 0;
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while (i < len) i += read(file, buf, len-i);
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}
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//reads a FLV header and checks for correctness
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//returns true if everything is alright, false otherwise
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bool FLV_Readheader(int file){
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Magic_Read(FLVHeader,13,file);
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if (FLVHeader[0] != 'F') return false;
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if (FLVHeader[1] != 'L') return false;
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if (FLVHeader[2] != 'V') return false;
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if (FLVHeader[8] != 0x09) return false;
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if (FLVHeader[9] != 0) return false;
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if (FLVHeader[10] != 0) return false;
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if (FLVHeader[11] != 0) return false;
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if (FLVHeader[12] != 0) return false;
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return true;
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}//FLV_Readheader
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bool FLV_Readheader(){
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fread(FLVHeader,1,13,stdin);
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if (FLVHeader[0] != 'F') return false;
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if (FLVHeader[1] != 'L') return false;
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if (FLVHeader[2] != 'V') return false;
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if (FLVHeader[8] != 0x09) return false;
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if (FLVHeader[9] != 0) return false;
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if (FLVHeader[10] != 0) return false;
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if (FLVHeader[11] != 0) return false;
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if (FLVHeader[12] != 0) return false;
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return true;
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}//FLV_Readheader
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//gets a packet, storing in given FLV_Pack pointer.
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//will assign pointer if null
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//resizes FLV_Pack data field bigger if data doesn't fit
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// (does not auto-shrink for speed!)
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void FLV_GetPacket(FLV_Pack *& p, int file){
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if (!p){p = (FLV_Pack*)calloc(1, sizeof(FLV_Pack));}
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if (p->buf < 15){p->data = (char*)realloc(p->data, 15); p->buf = 15;}
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Magic_Read(p->data,11,file);
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p->len = p->data[3] + 15;
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p->len += (p->data[2] << 8);
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p->len += (p->data[1] << 16);
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if (p->buf < p->len){p->data = (char*)realloc(p->data, p->len);}
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Magic_Read(p->data+11,p->len-11,file);
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}//FLV_GetPacket
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void FLV_GetPacket(FLV_Pack *& p){
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if (!p){p = (FLV_Pack*)calloc(1, sizeof(FLV_Pack));}
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if (p->buf < 15){p->data = (char*)realloc(p->data, 15); p->buf = 15;}
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fread(p->data,1,11,stdin);
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p->len = p->data[3] + 15;
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p->len += (p->data[2] << 8);
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p->len += (p->data[1] << 16);
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if (p->buf < p->len){p->data = (char*)realloc(p->data, p->len);}
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fread(p->data+11,1,p->len-11,stdin);
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}//FLV_GetPacket
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