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- //
- // WAV/AU Flash player with resampler
- //
- // Copyright (c) 2009, Anton Fedorov <datacompboy@call2ru.com>
- //
- /* This code is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 only, as
- * published by the Free Software Foundation.
- *
- * This code is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- * version 2 for more details (a copy is included in the LICENSE file that
- * accompanied this code).
- */
- package fmt;
- // FileAu: stream AU file reader
- // Reads any implemented codecs from it
- class FileAu extends fmt.File {
- var fileSize: Int;
- var format: Int;
- public function new() {
- super();
- fileSize = 0;
- format = 0;
- }
- // Set known full file length
- public override function setSize(size: Int): Void {
- fileSize = size;
- }
-
- // Get estimated sound length
- public override function getEtaLength(): Null<Float> {
- if (Readed < 0 || dataOff == 0 || Readed<dataOff) return null;
- return super.getEtaLength();
- }
-
- // Read file header
- public override function readHeader() {
- var i = Readed;
- while (i<bufsize) {
- if (dataOff == 0 || i < dataOff) { // Read header
- if (i < 24) {
- if (bufsize-i < 4) break;
- var DW = Buffer[i]*16777216+Buffer[i+1]*65536+Buffer[i+2]*256+Buffer[i+3];
- switch( i ) {
- case 0:
- if (DW != 0x2E736E64) {
- trace("Wrong file magic! Got "+DW+" instead of 779316836");
- Readed = -1;
- return;
- }
- case 4:
- dataOff = DW;
- if (dataOff < 24) dataOff = 24;
- trace("dataOff = "+dataOff);
- case 8:
- dataSize = DW;
- if (dataSize == 0) dataSize = -1; // Fix for incorrect AU file
- if (fileSize > 0 && dataSize == -1)
- dataSize = fileSize - dataOff; // Calc length if we can
- trace("dataSize = "+dataSize);
- case 12:
- format = DW;
- trace("format = "+format);
- case 16:
- rate = DW;
- trace("rate = "+rate);
- case 20:
- channels = DW;
- trace("channels = "+channels);
- }
- i += 4;
- if (i==24) { // Header complete: check consistency
- if (channels < 1 || channels > 2) {
- trace("Wrong number of channels: "+channels);
- Readed = -1;
- return;
- }
- switch ( format ) {
- case 1:
- trace("File in 8-bit G.711 mu-law format");
- sndDecoder = new DecoderG711u(8, false);
- case 27: // Really 27!
- trace("File in 8-bit G.711 a-law format");
- sndDecoder = new DecoderG711a(8, false);
- case 2:
- trace("File in 8-bit PCM format");
- sndDecoder = new DecoderPCM(8);
- case 3:
- trace("File in 16-bit PCM format");
- sndDecoder = new DecoderPCM(16);
- case 4:
- trace("File in 24-bit PCM format");
- sndDecoder = new DecoderPCM(24);
- case 5:
- trace("File in 32-bit PCM format");
- sndDecoder = new DecoderPCM(32);
- default:
- trace("File in unknown format #"+format);
- Readed = -1;
- return;
- }
- chunkSize = sndDecoder.sampleSize*channels;
- init();
- }
- } else {
- var NeedSkip = dataOff - (Readed+i);
- trace("dataOff = "+dataOff+"; Readed="+Readed+"; i="+i+"; bufsize="+bufsize+"; NeedSkip="+NeedSkip);
- if (NeedSkip > bufsize-i) {
- i = bufsize;
- } else {
- i += NeedSkip;
- }
- }
- } else { // Read sound
- break;
- }
- }
- Readed = i;
- }
- // Returns is stream ready to operate: header readed (1), not ready (0), error(-1)
- public override function ready(): Int {
- if (Readed < 0) return -1;
- if (channels == 0 || chunkSize == 0 || rate == 0 || sndDecoder==null || Readed < dataOff) return 0;
- return 1;
- }
- }
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