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POUnderstanding Ringdroid code + Android
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copied!<p>This question is for those who are familiar with the Ringdroid code. I am facing a bit difficulty in understanding '<a href="http://code.google.com/p/ringdroid/source/browse/trunk/src/com/ringdroid/soundfile/CheapAMR.java" rel="nofollow">CheapAMR.java</a>' file of Ringdroid <a href="http://code.google.com/p/ringdroid/source/browse/#svn/trunk%253Fstate%253Dclosed" rel="nofollow">code</a>. I have to implement this code in my Blackberry project, but first I want to understand the code properly. I am not able to understand what's the use of following arrays in this file :</p> <ol> <li><code>int[] adaptiveIndex</code></li> <li><code>int[] adaptiveGain</code></li> <li><code>int[] fixedGain</code></li> <li><code>int[][] pulse</code></li> </ol> <p>Also I am not able to understand how the values of these arrays are being filled. I am not getting any idea how to google for this issue since I am having no idea what they are doin in this code :</p> <pre><code> void getMR122Params(int[] bits, int[] adaptiveIndex, int[] adaptiveGain, int[] fixedGain, int[][] pulse) { adaptiveIndex[0] = 0x01 * bits[45] + 0x02 * bits[43] + 0x04 * bits[41] + 0x08 * bits[39] + 0x10 * bits[37] + 0x20 * bits[35] + 0x40 * bits[33] + 0x80 * bits[31] + 0x100 * bits[29]; adaptiveIndex[1] = 0x01 * bits[242] + 0x02 * bits[79] + 0x04 * bits[77] + 0x08 * bits[75] + 0x10 * bits[73] + 0x20 * bits[71]; adaptiveIndex[2] = 0x01 * bits[46] + 0x02 * bits[44] + 0x04 * bits[42] + 0x08 * bits[40] + 0x10 * bits[38] + 0x20 * bits[36] + 0x40 * bits[34] + 0x80 * bits[32] + 0x100 * bits[30]; adaptiveIndex[3] = 0x01 * bits[243] + 0x02 * bits[80] + 0x04 * bits[78] + 0x08 * bits[76] + 0x10 * bits[74] + 0x20 * bits[72]; adaptiveGain[0] = 0x01 * bits[88] + 0x02 * bits[55] + 0x04 * bits[51] + 0x08 * bits[47]; adaptiveGain[1] = 0x01 * bits[89] + 0x02 * bits[56] + 0x04 * bits[52] + 0x08 * bits[48]; adaptiveGain[2] = 0x01 * bits[90] + 0x02 * bits[57] + 0x04 * bits[53] + 0x08 * bits[49]; adaptiveGain[3] = 0x01 * bits[91] + 0x02 * bits[58] + 0x04 * bits[54] + 0x08 * bits[50]; fixedGain[0] = 0x01 * bits[104] + 0x02 * bits[92] + 0x04 * bits[67] + 0x08 * bits[63] + 0x10 * bits[59]; fixedGain[1] = 0x01 * bits[105] + 0x02 * bits[93] + 0x04 * bits[68] + 0x08 * bits[64] + 0x10 * bits[60]; fixedGain[2] = 0x01 * bits[106] + 0x02 * bits[94] + 0x04 * bits[69] + 0x08 * bits[65] + 0x10 * bits[61]; fixedGain[3] = 0x01 * bits[107] + 0x02 * bits[95] + 0x04 * bits[70] + 0x08 * bits[66] + 0x10 * bits[62]; pulse[0][0] = 0x01 * bits[122] + 0x02 * bits[123] + 0x04 * bits[124] + 0x08 * bits[96]; pulse[0][3] = 0x01 * bits[125] + 0x02 * bits[126] + 0x04 * bits[127] + 0x08 * bits[100]; pulse[0][2] = 0x01 * bits[128] + 0x02 * bits[129] + 0x04 * bits[130] + 0x08 * bits[108]; pulse[0][3] = 0x01 * bits[131] + 0x02 * bits[132] + 0x04 * bits[133] + 0x08 * bits[112]; pulse[0][4] = 0x01 * bits[134] + 0x02 * bits[135] + 0x04 * bits[136] + 0x08 * bits[116]; pulse[0][5] = 0x01 * bits[182] + 0x02 * bits[183] + 0x04 * bits[184]; pulse[0][6] = 0x01 * bits[185] + 0x02 * bits[186] + 0x04 * bits[187]; pulse[0][7] = 0x01 * bits[188] + 0x02 * bits[189] + 0x04 * bits[190]; pulse[0][8] = 0x01 * bits[191] + 0x02 * bits[192] + 0x04 * bits[193]; pulse[0][9] = 0x01 * bits[194] + 0x02 * bits[195] + 0x04 * bits[196]; pulse[1][0] = 0x01 * bits[137] + 0x02 * bits[138] + 0x04 * bits[139] + 0x08 * bits[97]; pulse[1][4] = 0x01 * bits[140] + 0x02 * bits[141] + 0x04 * bits[142] + 0x08 * bits[101]; pulse[1][2] = 0x01 * bits[143] + 0x02 * bits[144] + 0x04 * bits[145] + 0x08 * bits[109]; pulse[1][3] = 0x01 * bits[146] + 0x02 * bits[147] + 0x04 * bits[148] + 0x08 * bits[113]; pulse[1][4] = 0x01 * bits[149] + 0x02 * bits[150] + 0x04 * bits[151] + 0x08 * bits[117]; pulse[1][5] = 0x01 * bits[197] + 0x02 * bits[198] + 0x04 * bits[199]; pulse[1][6] = 0x01 * bits[200] + 0x02 * bits[201] + 0x04 * bits[202]; pulse[1][7] = 0x01 * bits[203] + 0x02 * bits[204] + 0x04 * bits[205]; pulse[1][8] = 0x01 * bits[206] + 0x02 * bits[207] + 0x04 * bits[208]; pulse[1][9] = 0x01 * bits[209] + 0x02 * bits[210] + 0x04 * bits[211]; pulse[2][0] = 0x01 * bits[152] + 0x02 * bits[153] + 0x04 * bits[154] + 0x08 * bits[98]; pulse[2][5] = 0x01 * bits[155] + 0x02 * bits[156] + 0x04 * bits[157] + 0x08 * bits[102]; pulse[2][2] = 0x01 * bits[158] + 0x02 * bits[159] + 0x04 * bits[160] + 0x08 * bits[110]; pulse[2][3] = 0x01 * bits[161] + 0x02 * bits[162] + 0x04 * bits[163] + 0x08 * bits[114]; pulse[2][4] = 0x01 * bits[164] + 0x02 * bits[165] + 0x04 * bits[166] + 0x08 * bits[118]; pulse[2][5] = 0x01 * bits[212] + 0x02 * bits[213] + 0x04 * bits[214]; pulse[2][6] = 0x01 * bits[215] + 0x02 * bits[216] + 0x04 * bits[217]; pulse[2][7] = 0x01 * bits[218] + 0x02 * bits[219] + 0x04 * bits[220]; pulse[2][8] = 0x01 * bits[221] + 0x02 * bits[222] + 0x04 * bits[223]; pulse[2][9] = 0x01 * bits[224] + 0x02 * bits[225] + 0x04 * bits[226]; pulse[3][0] = 0x01 * bits[167] + 0x02 * bits[168] + 0x04 * bits[169] + 0x08 * bits[99]; pulse[3][6] = 0x01 * bits[170] + 0x02 * bits[171] + 0x04 * bits[172] + 0x08 * bits[103]; pulse[3][2] = 0x01 * bits[173] + 0x02 * bits[174] + 0x04 * bits[175] + 0x08 * bits[111]; pulse[3][3] = 0x01 * bits[176] + 0x02 * bits[177] + 0x04 * bits[178] + 0x08 * bits[115]; pulse[3][4] = 0x01 * bits[179] + 0x02 * bits[180] + 0x04 * bits[181] + 0x08 * bits[119]; pulse[3][5] = 0x01 * bits[227] + 0x02 * bits[228] + 0x04 * bits[229]; pulse[3][6] = 0x01 * bits[230] + 0x02 * bits[231] + 0x04 * bits[232]; pulse[3][7] = 0x01 * bits[233] + 0x02 * bits[234] + 0x04 * bits[235]; pulse[3][8] = 0x01 * bits[236] + 0x02 * bits[237] + 0x04 * bits[238]; pulse[3][9] = 0x01 * bits[239] + 0x02 * bits[240] + 0x04 * bits[241]; } </code></pre> <p>If any one has understanding of this then please help me also in understanding it.</p>

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