MPEG-4编码技术 源码

#include "momusys.h" #include "vlc.h" #include "putvlc.h" #include "bitstream.h" Int PutDCsize_lum (Int size, Image *bitstream) { MOMCHECK(size >= 0 && size < 13); BitstreamPutBits (bitstream, DCtab_lum[size].code, DCtab_lum[size].len); return DCtab_lum[size].len; } Int PutDCsize_chrom (Int size, Image *bitstream) { MOMCHECK (size >= 0 && size < 13); BitstreamPutBits (bitstream, DCtab_chrom[size].code, DCtab_chrom[size].len); return DCtab_chrom[size].len; } Int PutMV (Int mvint, Image *bitstream) { Int sign = 0; Int absmv; if (mvint > 32) { absmv = -mvint + 65; sign = 1; } else absmv = mvint; BitstreamPutBits (bitstream, mvtab[absmv].code, mvtab[absmv].len); if (mvint != 0) { BitstreamPutBits (bitstream, sign, 1); return mvtab[absmv].len + 1; } else return mvtab[absmv].len; } Int PutMCBPC_Intra (Int cbpc, Int mode, Image *bitstream) { Int ind; ind = ((mode >> 1) & 3) | ((cbpc & 3) << 2); BitstreamPutBits (bitstream, mcbpc_intra_tab[ind].code, mcbpc_intra_tab[ind].len); return mcbpc_intra_tab[ind].len; } Int PutMCBPC_Inter (Int cbpc, Int mode, Image *bitstream) { Int ind; ind = (mode & 7) | ((cbpc & 3) << 3); BitstreamPutBits (bitstream, mcbpc_inter_tab[ind].code, mcbpc_inter_tab[ind].len); return mcbpc_inter_tab[ind].len; } Int PutMCBPC_Sprite (Int cbpc, Int mode, Image *bitstream) { Int ind; ind = (mode & 7) | ((cbpc & 3) << 3); BitstreamPutBits (bitstream, mcbpc_sprite_tab[ind].code, mcbpc_sprite_tab[ind].len); return mcbpc_sprite_tab[ind].len; } Int PutCBPY (Int cbpy, Char intra, Int *MB_transp_pattern, Image *bitstream) { Int ind; Int index=0; if (intra == 0) cbpy = 15 - cbpy; ind = cbpy; BitstreamPutBits (bitstream, cbpy_tab[ind].code, cbpy_tab[ind].len); return cbpy_tab[ind].len; } Int PutCoeff_Inter(Int run, Int level, Int last, Image *bitstream) { Int length = 0; MOMCHECK (last >= 0 && last < 2); MOMCHECK (run >= 0 && run < 64); MOMCHECK (level > 0 && level < 128); if (last == 0) { if (run < 2 && level < 13 ) { BitstreamPutBits (bitstream, (LInt)coeff_tab0[run][level-1].code, (LInt)coeff_tab0[run][level-1].len); length = coeff_tab0[run][level-1].len; } else if (run > 1 && run < 27 && level < 5) { BitstreamPutBits (bitstream, (LInt)coeff_tab1[run-2][level-1].code, (LInt)coeff_tab1[run-2][level-1].len); length = coeff_tab1[run-2][level-1].len; } } else if (last == 1) { if (run < 2 && level < 4) { BitstreamPutBits (bitstream, (LInt)coeff_tab2[run][level-1].code, (LInt)coeff_tab2[run][level-1].len); length = coeff_tab2[run][level-1].len; } else if (run > 1 && run < 42 && level == 1) { BitstreamPutBits (bitstream, (LInt)coeff_tab3[run-2].code, (LInt)coeff_tab3[run-2].len); length = coeff_tab3[run-2].len; } } return length; } Int PutCoeff_Intra(Int run, Int level, Int last, Image *bitstream) { Int length = 0; MOMCHECK (last >= 0 && last < 2); MOMCHECK (run >= 0 && run < 64); MOMCHECK (level > 0 && level < 128); if (last == 0) { if (run == 0 && level < 28 ) { BitstreamPutBits(bitstream, (LInt)coeff_tab4[level-1].code, (LInt)coeff_tab4[level-1].len); length = coeff_tab4[level-1].len; } else if (run == 1 && level < 11) { BitstreamPutBits(bitstream, (LInt)coeff_tab5[level-1].code, (LInt)coeff_tab5[level-1].len); length = coeff_tab5[level-1].len; } else if (run > 1 && run < 10 && level < 6) { BitstreamPutBits(bitstream, (LInt)coeff_tab6[run-2][level-1].code, (LInt)coeff_tab6[run-2][level-1].len); length = coeff_tab6[run-2][level-1].len; } else if (run > 9 && run < 15 && level == 1) { BitstreamPutBits(bitstream, (LInt)coeff_tab7[run-10].code, (LInt)coeff_tab7[run-10].len); length = coeff_tab7[run-10].len; } } else if (last == 1) { if (run == 0 && level < 9) { BitstreamPutBits(bitstream, (LInt)coeff_tab8[level-1].code, (LInt)coeff_tab8[level-1].len); length = coeff_tab8[level-1].len; } else if (run > 0 && run < 7 && level < 4) { BitstreamPutBits(bitstream, (LInt)coeff_tab9[run-1][level-1].code, (LInt)coeff_tab9[run-1][level-1].len); length = coeff_tab9[run-1][level-1].len; } else if (run > 6 && run < 21 && level == 1) { BitstreamPutBits(bitstream, (LInt)coeff_tab10[run-7].code, (LInt)coeff_tab10[run-7].len); length = coeff_tab10[run-7].len; } } return length; } Int PutCoeff_Inter_RVLC(Int run, Int level, Int last, Image *bitstream) { Int length = 0; MOMCHECK (last >= 0 && last < 2); MOMCHECK (run >= 0 && run < 64); MOMCHECK (level > 0 && level < 128); if (last == 0) { if (run == 0 && level < 20 ) { BitstreamPutBits(bitstream, (LInt)coeff_RVLCtab14[level-1].code, (LInt)coeff_RVLCtab14[level-1].len); length = coeff_RVLCtab14[level-1].len; } else if (run == 1 && level < 11) { BitstreamPutBits(bitstream, (LInt)coeff_RVLCtab15[level-1].code, (LInt)coeff_RVLCtab15[level-1].len); length = coeff_RVLCtab15[level-1].len; } else if (run > 1 && run < 4 && level < 8) { BitstreamPutBits(bitstream, (LInt)coeff_RVLCtab16[run-2][level-1].code, (LInt)coeff_RVLCtab16[run-2][level-1].len); length = coeff_RVLCtab16[run-2][level-1].len; } else if (run == 4 && level < 6) { BitstreamPutBits(bitstream, (LInt)coeff_RVLCtab17[level-1].code, (LInt)coeff_RVLCtab17[level-1].len); length = coeff_RVLCtab17[level-1].len; } else if (run > 4 && run < 8 && level < 5) { BitstreamPutBits(bitstream, (LInt)coeff_RVLCtab18[run-5][level-1].code, (LInt)coeff_RVLCtab18[run-5][level-1].len); length = coeff_RVLCtab18[run-5][level-1].len; } else if (run > 7 && run < 10 && level < 4) { BitstreamPutBits(bitstream, (LInt)coeff_RVLCtab19[run-8][level-1].code, (LInt)coeff_RVLCtab19[run-8][level-1].len); length = coeff_RVLCtab19[run-8][level-1].len; } else if (run > 9 && run < 18 && level < 3) { BitstreamPutBits(bitstream, (LInt)coeff_RVLCtab20[run-10][level-1].code, (LInt)coeff_RVLCtab20[run-10][level-1].len); length = coeff_RVLCtab20[run-10][level-1].len; } else if (run > 17 && run < 39 && level == 1) { BitstreamPutBits(bitstream, (LInt)coeff_RVLCtab21[run-18].code, (LInt)coeff_RVLCtab21[run-18].len); length = coeff_RVLCtab21[run-18].len; } } else if (last == 1) { if (run >= 0 && run < 2 && level < 6) { BitstreamPutBits(bitstream, (LInt)coeff_RVLCtab22[run][level-1].code, (LInt)coeff_RVLCtab22[run][level-1].len); length = coeff_RVLCtab22[run][level-1].len; } else if (run == 2 && level < 4) { BitstreamPutBits (bitstream, (LInt)coeff_RVLCtab23[level-1].code, (LInt)coeff_RVLCtab23[level-1].len); length = coeff_RVLCtab23[level-1].len; } else if (run > 2 && run < 14 && level < 3) { BitstreamPutBits(bitstream, (LInt)coeff_RVLCtab24[run-3][level-1].code, (LInt)coeff_RVLCtab24[run-3][level-1].len); length = coeff_RVLCtab24[run-3][level-1].len; } else if (run > 13 && run < 46 && level == 1) { BitstreamPutBits(bitstream, (LInt)coeff_RVLCtab25[run-14].code, (LInt)coeff_RVLCtab25[run-14].len); length = coeff_RVLCtab25[run-14].len; } } return length; } Int PutCoeff_Intra_RVLC(Int run, Int level, Int last, Image *bitstream) { Int length = 0; MOMCHECK (last >= 0 && last < 2); MOMCHECK (run >= 0 && run < 64); MOMCHECK (level > 0 && level < 128); if (last == 0) { if (run == 0 && level < 28 ) { BitstreamPutBits(bitstream, (LInt)coeff_RVLCtab1[level-1].code, (LInt)coeff_RVLCtab1[level-1].len); length = coeff_RVLCtab1[level-1].len; } else if (run == 1 && level < 14) { BitstreamPutBits(bitstream, (LInt)coeff_RVLCtab2[level-1].code, (LInt)coeff_RVLCtab2[level-1].len); l