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\n * Mode Extention:\n * When we are in stereo mode, there are 4 possible methods to store these\n * two channels. The stereo modes -m? are using a subset of them.\n *\n * -ms: MPG_MD_LR_LR\n * -mj: MPG_MD_LR_LR and MPG_MD_MS_LR\n * -mf: MPG_MD_MS_LR\n * -mi: all\n *\n */\nEncoder.MPG_MD_LR_LR = 0;\nEncoder.MPG_MD_LR_I = 1;\nEncoder.MPG_MD_MS_LR = 2;\nEncoder.MPG_MD_MS_I = 3;\n\nEncoder.fircoef = [-0.0207887 * 5, -0.0378413 * 5,\n -0.0432472 * 5, -0.031183 * 5, 7.79609e-18 * 5, 0.0467745 * 5,\n 0.10091 * 5, 0.151365 * 5, 0.187098 * 5];\n\nfunction Encoder() {\n var NewMDCT = require('./NewMDCT.js');\n var III_psy_ratio = require('./III_psy_ratio.js');\n\n var FFTOFFSET = Encoder.FFTOFFSET;\n var MPG_MD_MS_LR = Encoder.MPG_MD_MS_LR;\n //BitStream bs;\n //PsyModel psy;\n //VBRTag vbr;\n //QuantizePVT qupvt;\n var bs = null;\n this.psy = null;\n var psy = null;\n var vbr = null;\n var qupvt = null;\n\n //public final void setModules(BitStream bs, PsyModel psy, QuantizePVT qupvt,\n // VBRTag vbr) {\n this.setModules = function (_bs, _psy, _qupvt, _vbr) {\n bs = _bs;\n this.psy = _psy;\n psy = _psy;\n vbr = _vbr;\n qupvt = _qupvt;\n };\n\n var newMDCT = new NewMDCT();\n\n /***********************************************************************\n *\n * encoder and decoder delays\n *\n ***********************************************************************/\n\n /**\n *
\n * layer III enc->dec delay: 1056 (1057?) (observed)\n * layer II enc->dec delay: 480 (481?) (observed)\n *\n * polyphase 256-16 (dec or enc) = 240\n * mdct 256+32 (9*32) (dec or enc) = 288\n * total: 512+16\n *\n * My guess is that delay of polyphase filterbank is actualy 240.5\n * (there are technical reasons for this, see postings in mp3encoder).\n * So total Encode+Decode delay = ENCDELAY + 528 + 1\n *\n */\n\n\n /**\n * auto-adjust of ATH, useful for low volume Gabriel Bouvigne 3 feb 2001\n *\n * modifies some values in gfp.internal_flags.ATH (gfc.ATH)\n */\n//private void adjust_ATH(final LameInternalFlags gfc) {\n function adjust_ATH(gfc) {\n var gr2_max, max_pow;\n\n if (gfc.ATH.useAdjust == 0) {\n gfc.ATH.adjust = 1.0;\n /* no adjustment */\n return;\n }\n\n /* jd - 2001 mar 12, 27, jun 30 */\n /* loudness based on equal loudness curve; */\n /* use granule with maximum combined loudness */\n max_pow = gfc.loudness_sq[0][0];\n gr2_max = gfc.loudness_sq[1][0];\n if (gfc.channels_out == 2) {\n max_pow += gfc.loudness_sq[0][1];\n gr2_max += gfc.loudness_sq[1][1];\n } else {\n max_pow += max_pow;\n gr2_max += gr2_max;\n }\n if (gfc.mode_gr == 2) {\n max_pow = Math.max(max_pow, gr2_max);\n }\n max_pow *= 0.5;\n /* max_pow approaches 1.0 for full band noise */\n\n /* jd - 2001 mar 31, jun 30 */\n /* user tuning of ATH adjustment region */\n max_pow *= gfc.ATH.aaSensitivityP;\n\n /*\n * adjust ATH depending on range of maximum value\n */\n\n /* jd - 2001 feb27, mar12,20, jun30, jul22 */\n /* continuous curves based on approximation */\n /* to GB's original values. */\n /* For an increase in approximate loudness, */\n /* set ATH adjust to adjust_limit immediately */\n /* after a delay of one frame. */\n /* For a loudness decrease, reduce ATH adjust */\n /* towards adjust_limit gradually. */\n /* max_pow is a loudness squared or a power. */\n if (max_pow > 0.03125) { /* ((1 - 0.000625)/ 31.98) from curve below */\n if (gfc.ATH.adjust >= 1.0) {\n gfc.ATH.adjust = 1.0;\n } else {\n /* preceding frame has lower ATH adjust; */\n /* ascend only to the preceding adjust_limit */\n /* in case there is leading low volume */\n if (gfc.ATH.adjust < gfc.ATH.adjustLimit) {\n gfc.ATH.adjust = gfc.ATH.adjustLimit;\n }\n }\n gfc.ATH.adjustLimit = 1.0;\n } else { /* adjustment curve */\n /* about 32 dB maximum adjust (0.000625) */\n var adj_lim_new = 31.98 * max_pow + 0.000625;\n if (gfc.ATH.adjust >= adj_lim_new) { /* descend gradually */\n gfc.ATH.adjust *= adj_lim_new * 0.075 + 0.925;\n if (gfc.ATH.adjust < adj_lim_new) { /* stop descent */\n gfc.ATH.adjust = adj_lim_new;\n }\n } else { /* ascend */\n if (gfc.ATH.adjustLimit >= adj_lim_new) {\n gfc.ATH.adjust = adj_lim_new;\n } else {\n /* preceding frame has lower ATH adjust; */\n /* ascend only to the preceding adjust_limit */\n if (gfc.ATH.adjust < gfc.ATH.adjustLimit) {\n gfc.ATH.adjust = gfc.ATH.adjustLimit;\n }\n }\n }\n gfc.ATH.adjustLimit = adj_lim_new;\n }\n }\n\n /**\n *
\n * some simple statistics\n *\n * bitrate index 0: free bitrate . not allowed in VBR mode\n * : bitrates, kbps depending on MPEG version\n * bitrate index 15: forbidden\n *\n * mode_ext:\n * 0: LR\n * 1: LR-i\n * 2: MS\n * 3: MS-i\n *\n */\n function updateStats(gfc) {\n var gr, ch;\n assert(0 <= gfc.bitrate_index && gfc.bitrate_index < 16);\n assert(0 <= gfc.mode_ext && gfc.mode_ext < 4);\n\n /* count bitrate indices */\n gfc.bitrate_stereoMode_Hist[gfc.bitrate_index][4]++;\n gfc.bitrate_stereoMode_Hist[15][4]++;\n\n /* count 'em for every mode extension in case of 2 channel encoding */\n if (gfc.channels_out == 2) {\n gfc.bitrate_stereoMode_Hist[gfc.bitrate_index][gfc.mode_ext]++;\n gfc.bitrate_stereoMode_Hist[15][gfc.mode_ext]++;\n }\n for (gr = 0; gr < gfc.mode_gr; ++gr) {\n for (ch = 0; ch < gfc.channels_out; ++ch) {\n var bt = gfc.l3_side.tt[gr][ch].block_type | 0;\n if (gfc.l3_side.tt[gr][ch].mixed_block_flag != 0)\n bt = 4;\n gfc.bitrate_blockType_Hist[gfc.bitrate_index][bt]++;\n gfc.bitrate_blockType_Hist[gfc.bitrate_index][5]++;\n gfc.bitrate_blockType_Hist[15][bt]++;\n gfc.bitrate_blockType_Hist[15][5]++;\n }\n }\n }\n\n function lame_encode_frame_init(gfp, inbuf) {\n var gfc = gfp.internal_flags;\n\n var ch, gr;\n\n if (gfc.lame_encode_frame_init == 0) {\n /* prime the MDCT/polyphase filterbank with a short block */\n var i, j;\n var primebuff0 = new_float(286 + 1152 + 576);\n var primebuff1 = new_float(286 + 1152 + 576);\n gfc.lame_encode_frame_init = 1;\n for (i = 0, j = 0; i < 286 + 576 * (1 + gfc.mode_gr); ++i) {\n if (i < 576 * gfc.mode_gr) {\n primebuff0[i] = 0;\n if (gfc.channels_out == 2)\n primebuff1[i] = 0;\n } else {\n primebuff0[i] = inbuf[0][j];\n if (gfc.channels_out == 2)\n primebuff1[i] = inbuf[1][j];\n ++j;\n }\n }\n /* polyphase filtering / mdct */\n for (gr = 0; gr < gfc.mode_gr; gr++) {\n for (ch = 0; ch < gfc.channels_out; ch++) {\n gfc.l3_side.tt[gr][ch].block_type = Encoder.SHORT_TYPE;\n }\n }\n newMDCT.mdct_sub48(gfc, primebuff0, primebuff1);\n\n /* check FFT will not use a negative starting offset */\n assert(576 >= Encoder.FFTOFFSET);\n /* check if we have enough data for FFT */\n assert(gfc.mf_size >= (Encoder.BLKSIZE + gfp.framesize - Encoder.FFTOFFSET));\n /* check if we have enough data for polyphase filterbank */\n assert(gfc.mf_size >= (512 + gfp.framesize - 32));\n }\n\n }\n\n /**\n *
\n * encodeframe() Layer 3\n *\n * encode a single frame\n *\n *\n * lame_encode_frame()\n *\n *\n * gr 0 gr 1\n * inbuf: |--------------|--------------|--------------|\n *\n *\n * Polyphase (18 windows, each shifted 32)\n * gr 0:\n * window1 <----512---.\n * window18 <----512---.\n *\n * gr 1:\n * window1 <----512---.\n * window18 <----512---.\n *\n *\n *\n * MDCT output: |--------------|--------------|--------------|\n *\n * FFT's <---------1024---------.\n * <---------1024-------.\n *\n *\n *\n * inbuf = buffer of PCM data size=MP3 framesize\n * encoder acts on inbuf[ch][0], but output is delayed by MDCTDELAY\n * so the MDCT coefficints are from inbuf[ch][-MDCTDELAY]\n *\n * psy-model FFT has a 1 granule delay, so we feed it data for the\n * next granule.\n * FFT is centered over granule: 224+576+224\n * So FFT starts at: 576-224-MDCTDELAY\n *\n * MPEG2: FFT ends at: BLKSIZE+576-224-MDCTDELAY (1328)\n * MPEG1: FFT ends at: BLKSIZE+2*576-224-MDCTDELAY (1904)\n *\n * MPEG2: polyphase first window: [0..511]\n * 18th window: [544..1055] (1056)\n * MPEG1: 36th window: [1120..1631] (1632)\n * data needed: 512+framesize-32\n *\n * A close look newmdct.c shows that the polyphase filterbank\n * only uses data from [0..510] for each window. Perhaps because the window\n * used by the filterbank is zero for the last point, so Takehiro's\n * code doesn't bother to compute with it.\n *\n * FFT starts at 576-224-MDCTDELAY (304) = 576-FFTOFFSET\n *\n *\n */\n\n\n this.lame_encode_mp3_frame = function (gfp, inbuf_l, inbuf_r, mp3buf, mp3bufPos, mp3buf_size) {\n var mp3count;\n var masking_LR = new_array_n([2, 2]);\n /*\n * LR masking &\n * energy\n */\n masking_LR[0][0] = new III_psy_ratio();\n masking_LR[0][1] = new III_psy_ratio();\n masking_LR[1][0] = new III_psy_ratio();\n masking_LR[1][1] = new III_psy_ratio();\n var masking_MS = new_array_n([2, 2]);\n /* MS masking & energy */\n masking_MS[0][0] = new III_psy_ratio();\n masking_MS[0][1] = new III_psy_ratio();\n masking_MS[1][0] = new III_psy_ratio();\n masking_MS[1][1] = new III_psy_ratio();\n //III_psy_ratio masking[][];\n var masking;\n /* pointer to selected maskings */\n var inbuf = [null, null];\n var gfc = gfp.internal_flags;\n\n var tot_ener = new_float_n([2, 4]);\n var ms_ener_ratio = [.5, .5];\n var pe = [[0., 0.], [0., 0.]];\n var pe_MS = [[0., 0.], [0., 0.]];\n\n//float[][] pe_use;\n var pe_use;\n\n var ch, gr;\n\n inbuf[0] = inbuf_l;\n inbuf[1] = inbuf_r;\n\n if (gfc.lame_encode_frame_init == 0) {\n /* first run? */\n lame_encode_frame_init(gfp, inbuf);\n\n }\n\n /********************** padding *****************************/\n /**\n *
\n * padding method as described in\n * \"MPEG-Layer3 / Bitstream Syntax and Decoding\"\n * by Martin Sieler, Ralph Sperschneider\n *\n * note: there is no padding for the very first frame\n *\n * Robert Hegemann 2000-06-22\n *\n */\n gfc.padding = 0;\n if ((gfc.slot_lag -= gfc.frac_SpF) < 0) {\n gfc.slot_lag += gfp.out_samplerate;\n gfc.padding = 1;\n }\n\n /****************************************\n * Stage 1: psychoacoustic model *\n ****************************************/\n\n if (gfc.psymodel != 0) {\n /*\n * psychoacoustic model psy model has a 1 granule (576) delay that\n * we must compensate for (mt 6/99).\n */\n var ret;\n var bufp = [null, null];\n /* address of beginning of left & right granule */\n var bufpPos = 0;\n /* address of beginning of left & right granule */\n var blocktype = new_int(2);\n\n for (gr = 0; gr < gfc.mode_gr; gr++) {\n\n for (ch = 0; ch < gfc.channels_out; ch++) {\n bufp[ch] = inbuf[ch];\n bufpPos = 576 + gr * 576 - Encoder.FFTOFFSET;\n }\n if (gfp.VBR == VbrMode.vbr_mtrh || gfp.VBR == VbrMode.vbr_mt) {\n ret = psy.L3psycho_anal_vbr(gfp, bufp, bufpPos, gr,\n masking_LR, masking_MS, pe[gr], pe_MS[gr],\n tot_ener[gr], blocktype);\n } else {\n ret = psy.L3psycho_anal_ns(gfp, bufp, bufpPos, gr,\n masking_LR, masking_MS, pe[gr], pe_MS[gr],\n tot_ener[gr], blocktype);\n }\n if (ret != 0)\n return -4;\n\n if (gfp.mode == MPEGMode.JOINT_STEREO) {\n ms_ener_ratio[gr] = tot_ener[gr][2] + tot_ener[gr][3];\n if (ms_ener_ratio[gr] > 0)\n ms_ener_ratio[gr] = tot_ener[gr][3] / ms_ener_ratio[gr];\n }\n\n /* block type flags */\n for (ch = 0; ch < gfc.channels_out; ch++) {\n var cod_info = gfc.l3_side.tt[gr][ch];\n cod_info.block_type = blocktype[ch];\n cod_info.mixed_block_flag = 0;\n }\n }\n } else {\n /* no psy model */\n for (gr = 0; gr < gfc.mode_gr; gr++)\n for (ch = 0; ch < gfc.channels_out; ch++) {\n gfc.l3_side.tt[gr][ch].block_type = Encoder.NORM_TYPE;\n gfc.l3_side.tt[gr][ch].mixed_block_flag = 0;\n pe_MS[gr][ch] = pe[gr][ch] = 700;\n }\n }\n\n /* auto-adjust of ATH, useful for low volume */\n adjust_ATH(gfc);\n\n /****************************************\n * Stage 2: MDCT *\n ****************************************/\n\n /* polyphase filtering / mdct */\n newMDCT.mdct_sub48(gfc, inbuf[0], inbuf[1]);\n\n /****************************************\n * Stage 3: MS/LR decision *\n ****************************************/\n\n /* Here will be selected MS or LR coding of the 2 stereo channels */\n gfc.mode_ext = Encoder.MPG_MD_LR_LR;\n\n if (gfp.force_ms) {\n gfc.mode_ext = Encoder.MPG_MD_MS_LR;\n } else if (gfp.mode == MPEGMode.JOINT_STEREO) {\n /*\n * ms_ratio = is scaled, for historical reasons, to look like a\n * ratio of side_channel / total. 0 = signal is 100% mono .5 = L & R\n * uncorrelated\n */\n\n /**\n *
\n * [0] and [1] are the results for the two granules in MPEG-1,\n * in MPEG-2 it's only a faked averaging of the same value\n * _prev is the value of the last granule of the previous frame\n * _next is the value of the first granule of the next frame\n *\n */\n\n var sum_pe_MS = 0.;\n var sum_pe_LR = 0.;\n for (gr = 0; gr < gfc.mode_gr; gr++) {\n for (ch = 0; ch < gfc.channels_out; ch++) {\n sum_pe_MS += pe_MS[gr][ch];\n sum_pe_LR += pe[gr][ch];\n }\n }\n\n /* based on PE: M/S coding would not use much more bits than L/R */\n if (sum_pe_MS <= 1.00 * sum_pe_LR) {\n\n var gi0 = gfc.l3_side.tt[0];\n var gi1 = gfc.l3_side.tt[gfc.mode_gr - 1];\n\n if (gi0[0].block_type == gi0[1].block_type\n && gi1[0].block_type == gi1[1].block_type) {\n\n gfc.mode_ext = Encoder.MPG_MD_MS_LR;\n }\n }\n }\n\n /* bit and noise allocation */\n if (gfc.mode_ext == MPG_MD_MS_LR) {\n masking = masking_MS;\n /* use MS masking */\n pe_use = pe_MS;\n } else {\n masking = masking_LR;\n /* use LR masking */\n pe_use = pe;\n }\n\n /* copy data for MP3 frame analyzer */\n if (gfp.analysis && gfc.pinfo != null) {\n for (gr = 0; gr < gfc.mode_gr; gr++) {\n for (ch = 0; ch < gfc.channels_out; ch++) {\n gfc.pinfo.ms_ratio[gr] = gfc.ms_ratio[gr];\n gfc.pinfo.ms_ener_ratio[gr] = ms_ener_ratio[gr];\n gfc.pinfo.blocktype[gr][ch] = gfc.l3_side.tt[gr][ch].block_type;\n gfc.pinfo.pe[gr][ch] = pe_use[gr][ch];\n System.arraycopy(gfc.l3_side.tt[gr][ch].xr, 0,\n gfc.pinfo.xr[gr][ch], 0, 576);\n /*\n * in psymodel, LR and MS data was stored in pinfo. switch\n * to MS data:\n */\n if (gfc.mode_ext == MPG_MD_MS_LR) {\n gfc.pinfo.ers[gr][ch] = gfc.pinfo.ers[gr][ch + 2];\n System.arraycopy(gfc.pinfo.energy[gr][ch + 2], 0,\n gfc.pinfo.energy[gr][ch], 0,\n gfc.pinfo.energy[gr][ch].length);\n }\n }\n }\n }\n\n /****************************************\n * Stage 4: quantization loop *\n ****************************************/\n\n if (gfp.VBR == VbrMode.vbr_off || gfp.VBR == VbrMode.vbr_abr) {\n\n var i;\n var f;\n\n for (i = 0; i < 18; i++)\n gfc.nsPsy.pefirbuf[i] = gfc.nsPsy.pefirbuf[i + 1];\n\n f = 0.0;\n for (gr = 0; gr < gfc.mode_gr; gr++)\n for (ch = 0; ch < gfc.channels_out; ch++)\n f += pe_use[gr][ch];\n gfc.nsPsy.pefirbuf[18] = f;\n\n f = gfc.nsPsy.pefirbuf[9];\n for (i = 0; i < 9; i++)\n f += (gfc.nsPsy.pefirbuf[i] + gfc.nsPsy.pefirbuf[18 - i])\n * Encoder.fircoef[i];\n\n f = (670 * 5 * gfc.mode_gr * gfc.channels_out) / f;\n for (gr = 0; gr < gfc.mode_gr; gr++) {\n for (ch = 0; ch < gfc.channels_out; ch++) {\n pe_use[gr][ch] *= f;\n }\n }\n }\n gfc.iteration_loop.iteration_loop(gfp, pe_use, ms_ener_ratio, masking);\n\n /****************************************\n * Stage 5: bitstream formatting *\n ****************************************/\n\n /* write the frame to the bitstream */\n bs.format_bitstream(gfp);\n\n /* copy mp3 bit buffer into array */\n mp3count = bs.copy_buffer(gfc, mp3buf, mp3bufPos, mp3buf_size, 1);\n\n if (gfp.bWriteVbrTag)\n vbr.addVbrFrame(gfp);\n\n if (gfp.analysis && gfc.pinfo != null) {\n for (ch = 0; ch < gfc.channels_out; ch++) {\n var j;\n for (j = 0; j < FFTOFFSET; j++)\n gfc.pinfo.pcmdata[ch][j] = gfc.pinfo.pcmdata[ch][j\n + gfp.framesize];\n for (j = FFTOFFSET; j < 1600; j++) {\n gfc.pinfo.pcmdata[ch][j] = inbuf[ch][j - FFTOFFSET];\n }\n }\n qupvt.set_frame_pinfo(gfp, masking);\n }\n\n updateStats(gfc);\n\n return mp3count;\n }\n}\n\n\nmodule.exports = Encoder;\n","/*\n\tMIT License http://www.opensource.org/licenses/mit-license.php\n\tAuthor Tobias Koppers @sokra\n*/\n// css base code, injected by the css-loader\nmodule.exports = function(useSourceMap) {\n\tvar list = [];\n\n\t// return the list of modules as css string\n\tlist.toString = function toString() {\n\t\treturn this.map(function (item) {\n\t\t\tvar content = cssWithMappingToString(item, useSourceMap);\n\t\t\tif(item[2]) {\n\t\t\t\treturn \"@media \" + item[2] + \"{\" + content + \"}\";\n\t\t\t} else {\n\t\t\t\treturn content;\n\t\t\t}\n\t\t}).join(\"\");\n\t};\n\n\t// import a list of modules into the list\n\tlist.i = function(modules, mediaQuery) {\n\t\tif(typeof modules === \"string\")\n\t\t\tmodules = [[null, modules, \"\"]];\n\t\tvar alreadyImportedModules = {};\n\t\tfor(var i = 0; i < this.length; i++) {\n\t\t\tvar id = this[i][0];\n\t\t\tif(typeof id === \"number\")\n\t\t\t\talreadyImportedModules[id] = true;\n\t\t}\n\t\tfor(i = 0; i < modules.length; i++) {\n\t\t\tvar item = modules[i];\n\t\t\t// skip already imported module\n\t\t\t// this implementation is not 100% perfect for weird media query combinations\n\t\t\t// when a module is imported multiple times with different media queries.\n\t\t\t// I hope this will never occur (Hey this way we have smaller bundles)\n\t\t\tif(typeof item[0] !== \"number\" || !alreadyImportedModules[item[0]]) {\n\t\t\t\tif(mediaQuery && !item[2]) {\n\t\t\t\t\titem[2] = mediaQuery;\n\t\t\t\t} else if(mediaQuery) {\n\t\t\t\t\titem[2] = \"(\" + item[2] + \") and (\" + mediaQuery + \")\";\n\t\t\t\t}\n\t\t\t\tlist.push(item);\n\t\t\t}\n\t\t}\n\t};\n\treturn list;\n};\n\nfunction cssWithMappingToString(item, useSourceMap) {\n\tvar content = item[1] || '';\n\tvar cssMapping = item[3];\n\tif (!cssMapping) {\n\t\treturn content;\n\t}\n\n\tif (useSourceMap && typeof btoa === 'function') {\n\t\tvar sourceMapping = toComment(cssMapping);\n\t\tvar sourceURLs = cssMapping.sources.map(function (source) {\n\t\t\treturn '/*# sourceURL=' + cssMapping.sourceRoot + source + ' */'\n\t\t});\n\n\t\treturn [content].concat(sourceURLs).concat([sourceMapping]).join('\\n');\n\t}\n\n\treturn [content].join('\\n');\n}\n\n// Adapted from convert-source-map (MIT)\nfunction toComment(sourceMap) {\n\t// eslint-disable-next-line no-undef\n\tvar base64 = btoa(unescape(encodeURIComponent(JSON.stringify(sourceMap))));\n\tvar data = 'sourceMappingURL=data:application/json;charset=utf-8;base64,' + base64;\n\n\treturn '/*# ' + data + ' */';\n}\n","/**\n * Translates the list format produced by css-loader into something\n * easier to manipulate.\n */\nexport default function listToStyles (parentId, list) {\n var styles = []\n var newStyles = {}\n for (var i = 0; i < list.length; i++) {\n var item = list[i]\n var id = item[0]\n var css = item[1]\n var media = item[2]\n var sourceMap = item[3]\n var part = {\n id: parentId + ':' + i,\n css: css,\n media: media,\n sourceMap: sourceMap\n }\n if (!newStyles[id]) {\n styles.push(newStyles[id] = { id: id, parts: [part] })\n } else {\n newStyles[id].parts.push(part)\n }\n }\n return styles\n}\n","/*\n MIT License http://www.opensource.org/licenses/mit-license.php\n Author Tobias Koppers @sokra\n Modified by Evan You @yyx990803\n*/\n\nimport listToStyles from './listToStyles'\n\nvar hasDocument = typeof document !== 'undefined'\n\nif (typeof DEBUG !== 'undefined' && DEBUG) {\n if (!hasDocument) {\n throw new Error(\n 'vue-style-loader cannot be used in a non-browser environment. ' +\n \"Use { target: 'node' } in your Webpack config to indicate a server-rendering environment.\"\n ) }\n}\n\n/*\ntype StyleObject = {\n id: number;\n parts: Array