WaveFileParser.getCueBytes_ - Code Metrics - Inspection of "Read and write _PMX chunks" - rochars/wavefile - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Branch — v9.1.x (4df20f)

by Rafael S.

created 2020-01-03 08:49 UTC

WaveFileParser.getCueBytes_ A

↳ Parent: WaveFileParser

Complexity

Conditions

Size

Total Lines	14
Code Lines	10

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
eloc	10
dl	0
loc	14
rs	9.9
c	0
b	0
f	0
cc	2

/*
 * Copyright (c) 2017-2019 Rafael da Silva Rocha.
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 */

/**
 * @fileoverview The WaveFileParser class.
 * @see https://github.com/rochars/wavefile
 */

import { WaveFileReader } from './wavefile-reader';
import writeString from './write-string';
import { packTo, packStringTo, packString, pack } from 'byte-data';

/**
 * A class to read and write wav files.
 * @extends WaveFileReader
 */
export class WaveFileParser extends WaveFileReader {

  /**
   * Return a byte buffer representig the WaveFileParser object as a .wav file.
   * The return value of this method can be written straight to disk.
   * @return {!Uint8Array} A wav file.
   */
  toBuffer() {
    this.uInt16.be = this.container === 'RIFX';
    this.uInt32.be = this.uInt16.be;
    /** @type {!Array<!Array<number>>} */
    let fileBody = [
      this.getJunkBytes_(),
      this.getDs64Bytes_(),
      this.getBextBytes_(),
      this.getiXMLBytes_(),
      this.getFmtBytes_(),
      this.getFactBytes_(),
      packString(this.data.chunkId),
      pack(this.data.samples.length, this.uInt32),
      this.data.samples,
      this.getCueBytes_(),
      this.getSmplBytes_(),
      this.getLISTBytes_(),
      this.get_PMXBytes_()
    ];
    /** @type {number} */
    let fileBodyLength = 0;
    for (let i=0; i<fileBody.length; i++) {
      fileBodyLength += fileBody[i].length;
    }
    /** @type {!Uint8Array} */
    let file = new Uint8Array(fileBodyLength + 12);
    /** @type {number} */
    let index = 0;
    index = packStringTo(this.container, file, index);
    index = packTo(fileBodyLength + 4, this.uInt32, file, index);
    index = packStringTo(this.format, file, index);
    for (let i=0; i<fileBody.length; i++) {
      file.set(fileBody[i], index);
      index += fileBody[i].length;
    }
    return file;
  }

  /**
   * Return the bytes of the 'bext' chunk.
   * @private
   */
  getBextBytes_() {
    /** @type {!Array<number>} */
    let bytes = [];
    this.enforceBext_();
    if (this.bext.chunkId) {
      this.bext.chunkSize = 602 + this.bext.codingHistory.length;
      bytes = bytes.concat(
        packString(this.bext.chunkId),
        pack(602 + this.bext.codingHistory.length, this.uInt32),
        writeString(this.bext.description, 256),
        writeString(this.bext.originator, 32),
        writeString(this.bext.originatorReference, 32),
        writeString(this.bext.originationDate, 10),
        writeString(this.bext.originationTime, 8),
        pack(this.bext.timeReference[0], this.uInt32),
        pack(this.bext.timeReference[1], this.uInt32),
        pack(this.bext.version, this.uInt16),
        writeString(this.bext.UMID, 64),
        pack(this.bext.loudnessValue, this.uInt16),
        pack(this.bext.loudnessRange, this.uInt16),
        pack(this.bext.maxTruePeakLevel, this.uInt16),
        pack(this.bext.maxMomentaryLoudness, this.uInt16),
        pack(this.bext.maxShortTermLoudness, this.uInt16),
        writeString(this.bext.reserved, 180),
        writeString(
          this.bext.codingHistory, this.bext.codingHistory.length));
    }
    this.assureByteLen_(bytes);
    return bytes;
  }

  /**
   * Make sure a 'bext' chunk is created if BWF data was created in a file.
   * @private
   */
  enforceBext_() {
    for (let prop in this.bext) {
      if (this.bext.hasOwnProperty(prop)) {
        if (this.bext[prop] && prop != 'timeReference') {
          this.bext.chunkId = 'bext';
          break;
        }
      }
    }
    if (this.bext.timeReference[0] || this.bext.timeReference[1]) {
      this.bext.chunkId = 'bext';
    }
  }

  /**
   * Push a null byte into a byte array if
   * the byte count is odd.
   * @param {!Array<number>} bytes The byte array.
   * @private
   */
  assureByteLen_(bytes) {
    if (bytes.length % 2) {
      bytes.push(0);
    }
  }

  /**
   * Return the bytes of the 'iXML' chunk.
   * @return {!Array<number>} The 'iXML' chunk bytes.
   * @private
   */
  getiXMLBytes_() {
    /** @type {!Array<number>} */
    let bytes = [];
    if (this.iXML.chunkId) {
      bytes = bytes.concat(
        packString(this.iXML.chunkId),
        pack(this.iXML.chunkSize, this.uInt32),
        packString(this.iXML.value));
    }
    this.assureByteLen_(bytes);
    return bytes;
  }

  /**
   * Return the bytes of the 'ds64' chunk.
   * @return {!Array<number>} The 'ds64' chunk bytes.
   * @private
   */
  getDs64Bytes_() {
    /** @type {!Array<number>} */
    let bytes = [];
    if (this.ds64.chunkId) {
      bytes = bytes.concat(
        packString(this.ds64.chunkId),
        pack(this.ds64.chunkSize, this.uInt32),
        pack(this.ds64.riffSizeHigh, this.uInt32),
        pack(this.ds64.riffSizeLow, this.uInt32),
        pack(this.ds64.dataSizeHigh, this.uInt32),
        pack(this.ds64.dataSizeLow, this.uInt32),
        pack(this.ds64.originationTime, this.uInt32),
        pack(this.ds64.sampleCountHigh, this.uInt32),
        pack(this.ds64.sampleCountLow, this.uInt32));
    }
    //if (this.ds64.tableLength) {
    //  ds64Bytes = ds64Bytes.concat(
    //    pack(this.ds64.tableLength, this.uInt32),
    //    this.ds64.table);
    //}
    return bytes;
  }

  /**
   * Return the bytes of the 'cue ' chunk.
   * @return {!Array<number>} The 'cue ' chunk bytes.
   * @private
   */
  getCueBytes_() {
    /** @type {!Array<number>} */
    let bytes = [];
    if (this.cue.chunkId) {
      /** @type {!Array<number>} */
      let cuePointsBytes = this.getCuePointsBytes_();
      bytes = bytes.concat(
        packString(this.cue.chunkId),
        pack(cuePointsBytes.length + 4, this.uInt32),
        pack(this.cue.dwCuePoints, this.uInt32),
        cuePointsBytes);
    }
    return bytes;
  }

  /**
   * Return the bytes of the 'cue ' points.
   * @return {!Array<number>} The 'cue ' points as an array of bytes.
   * @private
   */
  getCuePointsBytes_() {
    /** @type {!Array<number>} */
    let points = [];
    for (let i=0; i<this.cue.dwCuePoints; i++) {
      points = points.concat(
        pack(this.cue.points[i].dwName, this.uInt32),
        pack(this.cue.points[i].dwPosition, this.uInt32),
        packString(this.cue.points[i].fccChunk),
        pack(this.cue.points[i].dwChunkStart, this.uInt32),
        pack(this.cue.points[i].dwBlockStart, this.uInt32),
        pack(this.cue.points[i].dwSampleOffset, this.uInt32));
    }
    return points;
  }

  /**
   * Return the bytes of the 'smpl' chunk.
   * @return {!Array<number>} The 'smpl' chunk bytes.
   * @private
   */
  getSmplBytes_() {
    /** @type {!Array<number>} */
    let bytes = [];
    if (this.smpl.chunkId) {
      /** @type {!Array<number>} */
      let smplLoopsBytes = this.getSmplLoopsBytes_();
      bytes = bytes.concat(
        packString(this.smpl.chunkId),
        pack(smplLoopsBytes.length + 36, this.uInt32),
        pack(this.smpl.dwManufacturer, this.uInt32),
        pack(this.smpl.dwProduct, this.uInt32),
        pack(this.smpl.dwSamplePeriod, this.uInt32),
        pack(this.smpl.dwMIDIUnityNote, this.uInt32),
        pack(this.smpl.dwMIDIPitchFraction, this.uInt32),
        pack(this.smpl.dwSMPTEFormat, this.uInt32),
        pack(this.smpl.dwSMPTEOffset, this.uInt32),
        pack(this.smpl.dwNumSampleLoops, this.uInt32),
        pack(this.smpl.dwSamplerData, this.uInt32),
        smplLoopsBytes);
    }
    return bytes;
  }

  /**
   * Return the bytes of the 'smpl' loops.
   * @return {!Array<number>} The 'smpl' loops as an array of bytes.
   * @private
   */
  getSmplLoopsBytes_() {
    /** @type {!Array<number>} */
    let loops = [];
    for (let i=0; i<this.smpl.dwNumSampleLoops; i++) {
      loops = loops.concat(
        pack(this.smpl.loops[i].dwName, this.uInt32),
        pack(this.smpl.loops[i].dwType, this.uInt32),
        pack(this.smpl.loops[i].dwStart, this.uInt32),
        pack(this.smpl.loops[i].dwEnd, this.uInt32),
        pack(this.smpl.loops[i].dwFraction, this.uInt32),
        pack(this.smpl.loops[i].dwPlayCount, this.uInt32));
    }
    return loops;
  }

  /**
   * Return the bytes of the 'fact' chunk.
   * @return {!Array<number>} The 'fact' chunk bytes.
   * @private
   */
  getFactBytes_() {
    /** @type {!Array<number>} */
    let bytes = [];
    if (this.fact.chunkId) {
      bytes = bytes.concat(
        packString(this.fact.chunkId),
        pack(this.fact.chunkSize, this.uInt32),
        pack(this.fact.dwSampleLength, this.uInt32));
    }
    return bytes;
  }

  /**
   * Return the bytes of the 'fmt ' chunk.
   * @return {!Array<number>} The 'fmt' chunk bytes.
   * @throws {Error} if no 'fmt ' chunk is present.
   * @private
   */
  getFmtBytes_() {
    /** @type {!Array<number>} */
    let fmtBytes = [];
    if (this.fmt.chunkId) {
      return fmtBytes.concat(
        packString(this.fmt.chunkId),
        pack(this.fmt.chunkSize, this.uInt32),
        pack(this.fmt.audioFormat, this.uInt16),
        pack(this.fmt.numChannels, this.uInt16),
        pack(this.fmt.sampleRate, this.uInt32),
        pack(this.fmt.byteRate, this.uInt32),
        pack(this.fmt.blockAlign, this.uInt16),
        pack(this.fmt.bitsPerSample, this.uInt16),
        this.getFmtExtensionBytes_());
    }
    throw Error('Could not find the "fmt " chunk');
  }

  /**
   * Return the bytes of the fmt extension fields.
   * @return {!Array<number>} The fmt extension bytes.
   * @private
   */
  getFmtExtensionBytes_() {
    /** @type {!Array<number>} */
    let extension = [];
    if (this.fmt.chunkSize > 16) {
      extension = extension.concat(
        pack(this.fmt.cbSize, this.uInt16));
    }
    if (this.fmt.chunkSize > 18) {
      extension = extension.concat(
        pack(this.fmt.validBitsPerSample, this.uInt16));
    }
    if (this.fmt.chunkSize > 20) {
      extension = extension.concat(
        pack(this.fmt.dwChannelMask, this.uInt32));
    }
    if (this.fmt.chunkSize > 24) {
      extension = extension.concat(
        pack(this.fmt.subformat[0], this.uInt32),
        pack(this.fmt.subformat[1], this.uInt32),
        pack(this.fmt.subformat[2], this.uInt32),
        pack(this.fmt.subformat[3], this.uInt32));
    }
    return extension;
  }

  /**
   * Return the bytes of the 'LIST' chunk.
   * @return {!Array<number>} The 'LIST' chunk bytes.
   * @private
   */
  getLISTBytes_() {
    /** @type {!Array<number>} */
    let bytes = [];
    for (let i=0; i<this.LIST.length; i++) {
      /** @type {!Array<number>} */
      let subChunksBytes = this.getLISTSubChunksBytes_(
          this.LIST[i].subChunks, this.LIST[i].format);
      bytes = bytes.concat(
        packString(this.LIST[i].chunkId),
        pack(subChunksBytes.length + 4, this.uInt32),
        packString(this.LIST[i].format),
        subChunksBytes);
    }
    return bytes;
  }

  /**
   * Return the bytes of the sub chunks of a 'LIST' chunk.
   * @param {!Array<!Object>} subChunks The 'LIST' sub chunks.
   * @param {string} format The format of the 'LIST' chunk.
   *    Currently supported values are 'adtl' or 'INFO'.
   * @return {!Array<number>} The sub chunk bytes.
   * @private
   */
  getLISTSubChunksBytes_(subChunks, format) {
    /** @type {!Array<number>} */
    let bytes = [];
    for (let i=0; i<subChunks.length; i++) {
      if (format == 'INFO') {
        bytes = bytes.concat(
          packString(subChunks[i].chunkId),
          pack(subChunks[i].value.length + 1, this.uInt32),
          writeString(
            subChunks[i].value, subChunks[i].value.length));
        bytes.push(0);
      } else if (format == 'adtl') {
        if (['labl', 'note'].indexOf(subChunks[i].chunkId) > -1) {
          bytes = bytes.concat(
            packString(subChunks[i].chunkId),
            pack(
              subChunks[i].value.length + 4 + 1, this.uInt32),
            pack(subChunks[i].dwName, this.uInt32),
            writeString(
              subChunks[i].value,
              subChunks[i].value.length));
          bytes.push(0);
        } else if (subChunks[i].chunkId == 'ltxt') {
          bytes = bytes.concat(
            this.getLtxtChunkBytes_(subChunks[i]));
        }
      }
      if (bytes.length % 2) {
        bytes.push(0);
      }
    }
    return bytes;
  }

  /**
   * Return the bytes of the '_PMX' chunk.
   * @return {!Array<number>} The '_PMX' chunk bytes.
   * @private
   */
  get_PMXBytes_() {
    /** @type {!Array<number>} */
    let bytes = [];
    if (this._PMX.chunkId) {
      bytes = bytes.concat(
        packString(this._PMX.chunkId),
        pack(this._PMX.chunkSize, this.uInt32),
        packString(this._PMX.value));
    }
    return bytes;
  }

  /**
   * Return the bytes of a 'ltxt' chunk.
   * @param {!Object} ltxt the 'ltxt' chunk.
   * @private
   */
  getLtxtChunkBytes_(ltxt) {
    return [].concat(
      packString(ltxt.chunkId),
      pack(ltxt.value.length + 20, this.uInt32),
      pack(ltxt.dwName, this.uInt32),
      pack(ltxt.dwSampleLength, this.uInt32),
      pack(ltxt.dwPurposeID, this.uInt32),
      pack(ltxt.dwCountry, this.uInt16),
      pack(ltxt.dwLanguage, this.uInt16),
      pack(ltxt.dwDialect, this.uInt16),
      pack(ltxt.dwCodePage, this.uInt16),
      writeString(ltxt.value, ltxt.value.length));
  }

  /**
   * Return the bytes of the 'junk' chunk.
   * @private
   */
  getJunkBytes_() {
    /** @type {!Array<number>} */
    let bytes = [];
    if (this.junk.chunkId) {
      return bytes.concat(
        packString(this.junk.chunkId),
        pack(this.junk.chunkData.length, this.uInt32),
        this.junk.chunkData);
    }
    return bytes;
  }
}


1			/*
2			* Copyright (c) 2017-2019 Rafael da Silva Rocha.
3			*
4			* Permission is hereby granted, free of charge, to any person obtaining
5			* a copy of this software and associated documentation files (the
6			* "Software"), to deal in the Software without restriction, including
7			* without limitation the rights to use, copy, modify, merge, publish,
8			* distribute, sublicense, and/or sell copies of the Software, and to
9			* permit persons to whom the Software is furnished to do so, subject to
10			* the following conditions:
11			*
12			* The above copyright notice and this permission notice shall be
13			* included in all copies or substantial portions of the Software.
14			*
15			* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16			* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17			* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18			* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
19			* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
20			* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
21			* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
22			*
23			*/
24
25			/**
26			* @fileoverview The WaveFileParser class.
27			* @see https://github.com/rochars/wavefile
28			*/
29
30			import { WaveFileReader } from './wavefile-reader';
31			import writeString from './write-string';
32			import { packTo, packStringTo, packString, pack } from 'byte-data';
33
34			/**
35			* A class to read and write wav files.
36			* @extends WaveFileReader
37			*/
38			export class WaveFileParser extends WaveFileReader {
39
40			/**
41			* Return a byte buffer representig the WaveFileParser object as a .wav file.
42			* The return value of this method can be written straight to disk.
43			* @return {!Uint8Array} A wav file.
44			*/
45			toBuffer() {
46			this.uInt16.be = this.container === 'RIFX';
47			this.uInt32.be = this.uInt16.be;
48			/** @type {!Array<!Array<number>>} */
49			let fileBody = [
50			this.getJunkBytes_(),
51			this.getDs64Bytes_(),
52			this.getBextBytes_(),
53			this.getiXMLBytes_(),
54			this.getFmtBytes_(),
55			this.getFactBytes_(),
56			packString(this.data.chunkId),
57			pack(this.data.samples.length, this.uInt32),
58			this.data.samples,
59			this.getCueBytes_(),
60			this.getSmplBytes_(),
61			this.getLISTBytes_(),
62			this.get_PMXBytes_()
63			];
64			/** @type {number} */
65			let fileBodyLength = 0;
66			for (let i=0; i<fileBody.length; i++) {
67			fileBodyLength += fileBody[i].length;
68			}
69			/** @type {!Uint8Array} */
70			let file = new Uint8Array(fileBodyLength + 12);
71			/** @type {number} */
72			let index = 0;
73			index = packStringTo(this.container, file, index);
74			index = packTo(fileBodyLength + 4, this.uInt32, file, index);
75			index = packStringTo(this.format, file, index);
76			for (let i=0; i<fileBody.length; i++) {
77			file.set(fileBody[i], index);
78			index += fileBody[i].length;
79			}
80			return file;
81			}
82
83			/**
84			* Return the bytes of the 'bext' chunk.
85			* @private
86			*/
87			getBextBytes_() {
88			/** @type {!Array<number>} */
89			let bytes = [];
90			this.enforceBext_();
91			if (this.bext.chunkId) {
92			this.bext.chunkSize = 602 + this.bext.codingHistory.length;
93			bytes = bytes.concat(
94			packString(this.bext.chunkId),
95			pack(602 + this.bext.codingHistory.length, this.uInt32),
96			writeString(this.bext.description, 256),
97			writeString(this.bext.originator, 32),
98			writeString(this.bext.originatorReference, 32),
99			writeString(this.bext.originationDate, 10),
100			writeString(this.bext.originationTime, 8),
101			pack(this.bext.timeReference[0], this.uInt32),
102			pack(this.bext.timeReference[1], this.uInt32),
103			pack(this.bext.version, this.uInt16),
104			writeString(this.bext.UMID, 64),
105			pack(this.bext.loudnessValue, this.uInt16),
106			pack(this.bext.loudnessRange, this.uInt16),
107			pack(this.bext.maxTruePeakLevel, this.uInt16),
108			pack(this.bext.maxMomentaryLoudness, this.uInt16),
109			pack(this.bext.maxShortTermLoudness, this.uInt16),
110			writeString(this.bext.reserved, 180),
111			writeString(
112			this.bext.codingHistory, this.bext.codingHistory.length));
113			}
114			this.assureByteLen_(bytes);
115			return bytes;
116			}
117
118			/**
119			* Make sure a 'bext' chunk is created if BWF data was created in a file.
120			* @private
121			*/
122			enforceBext_() {
123			for (let prop in this.bext) {
124			if (this.bext.hasOwnProperty(prop)) {
125			if (this.bext[prop] && prop != 'timeReference') {
126			this.bext.chunkId = 'bext';
127			break;
128			}
129			}
130			}
131			if (this.bext.timeReference[0] \|\| this.bext.timeReference[1]) {
132			this.bext.chunkId = 'bext';
133			}
134			}
135
136			/**
137			* Push a null byte into a byte array if
138			* the byte count is odd.
139			* @param {!Array<number>} bytes The byte array.
140			* @private
141			*/
142			assureByteLen_(bytes) {
143			if (bytes.length % 2) {
144			bytes.push(0);
145			}
146			}
147
148			/**
149			* Return the bytes of the 'iXML' chunk.
150			* @return {!Array<number>} The 'iXML' chunk bytes.
151			* @private
152			*/
153			getiXMLBytes_() {
154			/** @type {!Array<number>} */
155			let bytes = [];
156			if (this.iXML.chunkId) {
157			bytes = bytes.concat(
158			packString(this.iXML.chunkId),
159			pack(this.iXML.chunkSize, this.uInt32),
160			packString(this.iXML.value));
161			}
162			this.assureByteLen_(bytes);
163			return bytes;
164			}
165
166			/**
167			* Return the bytes of the 'ds64' chunk.
168			* @return {!Array<number>} The 'ds64' chunk bytes.
169			* @private
170			*/
171			getDs64Bytes_() {
172			/** @type {!Array<number>} */
173			let bytes = [];
174			if (this.ds64.chunkId) {
175			bytes = bytes.concat(
176			packString(this.ds64.chunkId),
177			pack(this.ds64.chunkSize, this.uInt32),
178			pack(this.ds64.riffSizeHigh, this.uInt32),
179			pack(this.ds64.riffSizeLow, this.uInt32),
180			pack(this.ds64.dataSizeHigh, this.uInt32),
181			pack(this.ds64.dataSizeLow, this.uInt32),
182			pack(this.ds64.originationTime, this.uInt32),
183			pack(this.ds64.sampleCountHigh, this.uInt32),
184			pack(this.ds64.sampleCountLow, this.uInt32));
185			}
186			//if (this.ds64.tableLength) {
187			// ds64Bytes = ds64Bytes.concat(
188			// pack(this.ds64.tableLength, this.uInt32),
189			// this.ds64.table);
190			//}
191			return bytes;
192			}
193
194			/**
195			* Return the bytes of the 'cue ' chunk.
196			* @return {!Array<number>} The 'cue ' chunk bytes.
197			* @private
198			*/
199			getCueBytes_() {
200			/** @type {!Array<number>} */
201			let bytes = [];
202			if (this.cue.chunkId) {
203			/** @type {!Array<number>} */
204			let cuePointsBytes = this.getCuePointsBytes_();
205			bytes = bytes.concat(
206			packString(this.cue.chunkId),
207			pack(cuePointsBytes.length + 4, this.uInt32),
208			pack(this.cue.dwCuePoints, this.uInt32),
209			cuePointsBytes);
210			}
211			return bytes;
212			}
213
214			/**
215			* Return the bytes of the 'cue ' points.
216			* @return {!Array<number>} The 'cue ' points as an array of bytes.
217			* @private
218			*/
219			getCuePointsBytes_() {
220			/** @type {!Array<number>} */
221			let points = [];
222			for (let i=0; i<this.cue.dwCuePoints; i++) {
223			points = points.concat(
224			pack(this.cue.points[i].dwName, this.uInt32),
225			pack(this.cue.points[i].dwPosition, this.uInt32),
226			packString(this.cue.points[i].fccChunk),
227			pack(this.cue.points[i].dwChunkStart, this.uInt32),
228			pack(this.cue.points[i].dwBlockStart, this.uInt32),
229			pack(this.cue.points[i].dwSampleOffset, this.uInt32));
230			}
231			return points;
232			}
233
234			/**
235			* Return the bytes of the 'smpl' chunk.
236			* @return {!Array<number>} The 'smpl' chunk bytes.
237			* @private
238			*/
239			getSmplBytes_() {
240			/** @type {!Array<number>} */
241			let bytes = [];
242			if (this.smpl.chunkId) {
243			/** @type {!Array<number>} */
244			let smplLoopsBytes = this.getSmplLoopsBytes_();
245			bytes = bytes.concat(
246			packString(this.smpl.chunkId),
247			pack(smplLoopsBytes.length + 36, this.uInt32),
248			pack(this.smpl.dwManufacturer, this.uInt32),
249			pack(this.smpl.dwProduct, this.uInt32),
250			pack(this.smpl.dwSamplePeriod, this.uInt32),
251			pack(this.smpl.dwMIDIUnityNote, this.uInt32),
252			pack(this.smpl.dwMIDIPitchFraction, this.uInt32),
253			pack(this.smpl.dwSMPTEFormat, this.uInt32),
254			pack(this.smpl.dwSMPTEOffset, this.uInt32),
255			pack(this.smpl.dwNumSampleLoops, this.uInt32),
256			pack(this.smpl.dwSamplerData, this.uInt32),
257			smplLoopsBytes);
258			}
259			return bytes;
260			}
261
262			/**
263			* Return the bytes of the 'smpl' loops.
264			* @return {!Array<number>} The 'smpl' loops as an array of bytes.
265			* @private
266			*/
267			getSmplLoopsBytes_() {
268			/** @type {!Array<number>} */
269			let loops = [];
270			for (let i=0; i<this.smpl.dwNumSampleLoops; i++) {
271			loops = loops.concat(
272			pack(this.smpl.loops[i].dwName, this.uInt32),
273			pack(this.smpl.loops[i].dwType, this.uInt32),
274			pack(this.smpl.loops[i].dwStart, this.uInt32),
275			pack(this.smpl.loops[i].dwEnd, this.uInt32),
276			pack(this.smpl.loops[i].dwFraction, this.uInt32),
277			pack(this.smpl.loops[i].dwPlayCount, this.uInt32));
278			}
279			return loops;
280			}
281
282			/**
283			* Return the bytes of the 'fact' chunk.
284			* @return {!Array<number>} The 'fact' chunk bytes.
285			* @private
286			*/
287			getFactBytes_() {
288			/** @type {!Array<number>} */
289			let bytes = [];
290			if (this.fact.chunkId) {
291			bytes = bytes.concat(
292			packString(this.fact.chunkId),
293			pack(this.fact.chunkSize, this.uInt32),
294			pack(this.fact.dwSampleLength, this.uInt32));
295			}
296			return bytes;
297			}
298
299			/**
300			* Return the bytes of the 'fmt ' chunk.
301			* @return {!Array<number>} The 'fmt' chunk bytes.
302			* @throws {Error} if no 'fmt ' chunk is present.
303			* @private
304			*/
305			getFmtBytes_() {
306			/** @type {!Array<number>} */
307			let fmtBytes = [];
308			if (this.fmt.chunkId) {
309			return fmtBytes.concat(
310			packString(this.fmt.chunkId),
311			pack(this.fmt.chunkSize, this.uInt32),
312			pack(this.fmt.audioFormat, this.uInt16),
313			pack(this.fmt.numChannels, this.uInt16),
314			pack(this.fmt.sampleRate, this.uInt32),
315			pack(this.fmt.byteRate, this.uInt32),
316			pack(this.fmt.blockAlign, this.uInt16),
317			pack(this.fmt.bitsPerSample, this.uInt16),
318			this.getFmtExtensionBytes_());
319			}
320			throw Error('Could not find the "fmt " chunk');
321			}
322
323			/**
324			* Return the bytes of the fmt extension fields.
325			* @return {!Array<number>} The fmt extension bytes.
326			* @private
327			*/
328			getFmtExtensionBytes_() {
329			/** @type {!Array<number>} */
330			let extension = [];
331			if (this.fmt.chunkSize > 16) {
332			extension = extension.concat(
333			pack(this.fmt.cbSize, this.uInt16));
334			}
335			if (this.fmt.chunkSize > 18) {
336			extension = extension.concat(
337			pack(this.fmt.validBitsPerSample, this.uInt16));
338			}
339			if (this.fmt.chunkSize > 20) {
340			extension = extension.concat(
341			pack(this.fmt.dwChannelMask, this.uInt32));
342			}
343			if (this.fmt.chunkSize > 24) {
344			extension = extension.concat(
345			pack(this.fmt.subformat[0], this.uInt32),
346			pack(this.fmt.subformat[1], this.uInt32),
347			pack(this.fmt.subformat[2], this.uInt32),
348			pack(this.fmt.subformat[3], this.uInt32));
349			}
350			return extension;
351			}
352
353			/**
354			* Return the bytes of the 'LIST' chunk.
355			* @return {!Array<number>} The 'LIST' chunk bytes.
356			* @private
357			*/
358			getLISTBytes_() {
359			/** @type {!Array<number>} */
360			let bytes = [];
361			for (let i=0; i<this.LIST.length; i++) {
362			/** @type {!Array<number>} */
363			let subChunksBytes = this.getLISTSubChunksBytes_(
364			this.LIST[i].subChunks, this.LIST[i].format);
365			bytes = bytes.concat(
366			packString(this.LIST[i].chunkId),
367			pack(subChunksBytes.length + 4, this.uInt32),
368			packString(this.LIST[i].format),
369			subChunksBytes);
370			}
371			return bytes;
372			}
373
374			/**
375			* Return the bytes of the sub chunks of a 'LIST' chunk.
376			* @param {!Array<!Object>} subChunks The 'LIST' sub chunks.
377			* @param {string} format The format of the 'LIST' chunk.
378			* Currently supported values are 'adtl' or 'INFO'.
379			* @return {!Array<number>} The sub chunk bytes.
380			* @private
381			*/
382			getLISTSubChunksBytes_(subChunks, format) {
383			/** @type {!Array<number>} */
384			let bytes = [];
385			for (let i=0; i<subChunks.length; i++) {
386			if (format == 'INFO') {
387			bytes = bytes.concat(
388			packString(subChunks[i].chunkId),
389			pack(subChunks[i].value.length + 1, this.uInt32),
390			writeString(
391			subChunks[i].value, subChunks[i].value.length));
392			bytes.push(0);
393			} else if (format == 'adtl') {
394			if (['labl', 'note'].indexOf(subChunks[i].chunkId) > -1) {
395			bytes = bytes.concat(
396			packString(subChunks[i].chunkId),
397			pack(
398			subChunks[i].value.length + 4 + 1, this.uInt32),
399			pack(subChunks[i].dwName, this.uInt32),
400			writeString(
401			subChunks[i].value,
402			subChunks[i].value.length));
403			bytes.push(0);
404			} else if (subChunks[i].chunkId == 'ltxt') {
405			bytes = bytes.concat(
406			this.getLtxtChunkBytes_(subChunks[i]));
407			}
408			}
409			if (bytes.length % 2) {
410			bytes.push(0);
411			}
412			}
413			return bytes;
414			}
415
416			/**
417			* Return the bytes of the '_PMX' chunk.
418			* @return {!Array<number>} The '_PMX' chunk bytes.
419			* @private
420			*/
421			get_PMXBytes_() {
422			/** @type {!Array<number>} */
423			let bytes = [];
424			if (this._PMX.chunkId) {
425			bytes = bytes.concat(
426			packString(this._PMX.chunkId),
427			pack(this._PMX.chunkSize, this.uInt32),
428			packString(this._PMX.value));
429			}
430			return bytes;
431			}
432
433			/**
434			* Return the bytes of a 'ltxt' chunk.
435			* @param {!Object} ltxt the 'ltxt' chunk.
436			* @private
437			*/
438			getLtxtChunkBytes_(ltxt) {
439			return [].concat(
440			packString(ltxt.chunkId),
441			pack(ltxt.value.length + 20, this.uInt32),
442			pack(ltxt.dwName, this.uInt32),
443			pack(ltxt.dwSampleLength, this.uInt32),
444			pack(ltxt.dwPurposeID, this.uInt32),
445			pack(ltxt.dwCountry, this.uInt16),
446			pack(ltxt.dwLanguage, this.uInt16),
447			pack(ltxt.dwDialect, this.uInt16),
448			pack(ltxt.dwCodePage, this.uInt16),
449			writeString(ltxt.value, ltxt.value.length));
450			}
451
452			/**
453			* Return the bytes of the 'junk' chunk.
454			* @private
455			*/
456			getJunkBytes_() {
457			/** @type {!Array<number>} */
458			let bytes = [];
459			if (this.junk.chunkId) {
460			return bytes.concat(
461			packString(this.junk.chunkId),
462			pack(this.junk.chunkData.length, this.uInt32),
463			this.junk.chunkData);
464			}
465			return bytes;
466			}
467			}
468

rochars / wavefile

Branch — v9.1.x (4df20f)

WaveFileParser.getCueBytes_ A

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