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Added MPEG library

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Erik Zandvliet 2017-07-28 11:43:24 +02:00 • committed by Thulinma
parent 5dce70e933
commit 9c2bd38611
4 changed files with 113 additions and 7 deletions
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44
lib/mpeg.h Normal file
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#include <stdint.h>
#include <string>
namespace Mpeg{
const static double sampleRates[2][3] ={{44.1, 48.0, 32.0},{22.05, 24.0, 16.0}};
const static int sampleCounts[2][3] ={{374, 1152, 1152},{384, 1152, 576}};
const static int bitRates[2][3][16] ={
{{0, 32, 64, 96, 128, 160, 192, 224, 256, 288, 320, 352, 384, 416, 448, -1},
{0, 32, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320, 384, -1},
{0, 32, 40, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320, -1}},
{{0, 32, 48, 56, 64, 80, 96, 112, 128, 144, 160, 176, 192, 224, 256, -1},
{0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160, -1},
{0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160, -1}}};
struct MP2Info{
uint64_t sampleRate;
uint8_t channels;
};
MP2Info parseMP2Header(const std::string &hdr);
MP2Info parseMP2Header(const char *hdr);
const static double frameRate[16] ={
0, 24000.0 / 1001, 24, 25, 30000.0 / 1001, 30, 50, 60000.0 / 1001, 60, 0, 0, 0, 0, 0, 0, 0};
class MPEG2Info{
public:
MPEG2Info(){clear();}
void clear();
uint64_t width;
uint64_t height;
double fps;
uint16_t tempSeq;
uint8_t frameType;
bool isHeader;
};
MPEG2Info parseMPEG2Header(const std::string &hdr);
MPEG2Info parseMPEG2Header(const char *hdr);
bool parseMPEG2Header(const char *hdr, MPEG2Info &mpInfo);
void parseMPEG2Headers(const char *hdr, uint32_t len, MPEG2Info &mpInfo);
MPEG2Info parseMPEG2Headers(const char *hdr, uint32_t len);
}