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That year should bring the long-awaited OpenGL ES 3.0 compatible renderer with state-of-the-art rendering techniques tuned to work as low as middle end handheld devices - without compromising with the possibilities given for higher end desktop games of course. Great times ahead for the Godot community and the gamers that will play our games!
621 lines
16 KiB
C++
621 lines
16 KiB
C++
/*************************************************************************/
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/* cp_loader_it_samples.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* http://www.godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur. */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#include "cp_loader_it.h"
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#include "cp_sample.h"
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struct AuxSampleData {
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uint32_t fileofs;
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uint32_t c5spd;
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uint32_t length;
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uint32_t loop_begin;
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uint32_t loop_end;
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bool loop_enabled;
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bool pingpong_enabled;
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bool is16bit;
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bool stereo;
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bool exists;
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bool compressed;
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};
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enum IT_Sample_Flags {
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IT_SAMPLE_EXISTS=1,
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IT_SAMPLE_16BITS=2,
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IT_SAMPLE_STEREO=4,
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IT_SAMPLE_COMPRESSED=8,
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IT_SAMPLE_LOOPED=16,
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IT_SAMPLE_SUSTAIN_LOOPED=32,
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IT_SAMPLE_LOOP_IS_PINGPONG=64,
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IT_SAMPLE_SUSTAIN_LOOP_IS_PINGPONG=128
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};
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CPLoader::Error CPLoader_IT::load_sample(CPSample *p_sample) {
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AuxSampleData aux_sample_data;
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char aux_header[4];
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file->get_byte_array((uint8_t*)aux_header,4);
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if ( aux_header[0]!='I' ||
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aux_header[1]!='M' ||
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aux_header[2]!='P' ||
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aux_header[3]!='S') {
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//CP_PRINTERR("IT CPLoader CPSample: Failed Identifier");
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return FILE_UNRECOGNIZED;
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}
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// Ignore deprecated 8.3 filename
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for (int i=0;i<12;i++) file->get_byte();
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file->get_byte(); //ignore zerobyte
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p_sample->set_global_volume( file->get_byte() );
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/* SAMPLE FLAGS */
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uint8_t flags=file->get_byte();
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aux_sample_data.loop_enabled=flags&IT_SAMPLE_LOOPED;
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aux_sample_data.pingpong_enabled=flags&IT_SAMPLE_LOOP_IS_PINGPONG;
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aux_sample_data.is16bit=flags&IT_SAMPLE_16BITS;
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aux_sample_data.exists=flags&IT_SAMPLE_EXISTS;
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aux_sample_data.stereo=flags&IT_SAMPLE_STEREO;
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aux_sample_data.compressed=flags&IT_SAMPLE_COMPRESSED;
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p_sample->set_default_volume(file->get_byte());
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/* SAMPLE NAME */
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char aux_name[26];
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file->get_byte_array((uint8_t*)aux_name,26);
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p_sample->set_name(aux_name);
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// ??
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uint8_t convert_flag=file->get_byte();
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// PAN
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uint8_t pan=file->get_byte();
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p_sample->set_pan( pan&0x7F );
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p_sample->set_pan_enabled( pan & 0x80 );
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aux_sample_data.length=file->get_dword();
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aux_sample_data.loop_begin= file->get_dword();
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aux_sample_data.loop_end= file->get_dword();
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aux_sample_data.c5spd=file->get_dword();
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/*p_sample->data.set_sustain_loop_begin=*/file->get_dword();
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/*p_sample->data.sustain_loop_end=*/file->get_dword();
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aux_sample_data.fileofs=file->get_dword();
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p_sample->set_vibrato_speed( file->get_byte() );
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p_sample->set_vibrato_depth( file->get_byte() );
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p_sample->set_vibrato_rate( file->get_byte() );
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switch( file->get_byte() ) {
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/* Vibrato Wave: 0=sine, 1=rampdown, 2=square, 3=random */
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case 0: p_sample->set_vibrato_type( CPSample::VIBRATO_SINE ); break;
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case 1: p_sample->set_vibrato_type( CPSample::VIBRATO_SAW ); break;
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case 2: p_sample->set_vibrato_type( CPSample::VIBRATO_SQUARE ); break;
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case 3: p_sample->set_vibrato_type( CPSample::VIBRATO_RANDOM ); break;
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default: p_sample->set_vibrato_type( CPSample::VIBRATO_SINE ); break;
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}
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//printf("Name %s - Flags: fileofs :%i - c5spd %i - len %i 16b %i - data?: %i\n",p_sample->get_name(),aux_sample_data.fileofs,aux_sample_data.c5spd, aux_sample_data.length, aux_sample_data.is16bit,aux_sample_data.exists);
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CPSample_ID samp_id;
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if (aux_sample_data.exists) {
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samp_id=load_sample_data(aux_sample_data);
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CPSampleManager::get_singleton()->set_c5_freq(samp_id,aux_sample_data.c5spd);
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CPSampleManager::get_singleton()->set_loop_begin( samp_id,aux_sample_data.loop_begin );
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CPSampleManager::get_singleton()->set_loop_end( samp_id,aux_sample_data.loop_end );
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CPSample_Loop_Type loop_type=aux_sample_data.loop_enabled?( aux_sample_data.pingpong_enabled? CP_LOOP_BIDI: CP_LOOP_FORWARD):CP_LOOP_NONE;
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CPSampleManager::get_singleton()->set_loop_end( samp_id,aux_sample_data.loop_end );
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CPSampleManager::get_singleton()->set_loop_type( samp_id, loop_type);
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}
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//printf("Loaded id is null?: %i\n",samp_id.is_null());
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p_sample->set_sample_data(samp_id);
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if (!samp_id.is_null()) {
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// printf("Loaded ID: stereo: %i len %i 16bit %i\n",CPSampleManager::get_singleton()->is_stereo(samp_id), CPSampleManager::get_singleton()->get_size( samp_id), CPSampleManager::get_singleton()->is_16bits( samp_id) );
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}
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CP_ERR_COND_V( file->eof_reached(),FILE_CORRUPTED );
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CP_ERR_COND_V( file->get_error(),FILE_CORRUPTED );
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return FILE_OK;
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}
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CPSample_ID CPLoader_IT::load_sample_data(AuxSampleData& p_sample_data) {
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int aux_sample_properties = (p_sample_data.is16bit?IT_SAMPLE_16BITS:0)|(p_sample_data.compressed?IT_SAMPLE_COMPRESSED:0)|(p_sample_data.stereo?IT_SAMPLE_STEREO:0);
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file->seek(p_sample_data.fileofs);
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CPSampleManager *sm=CPSampleManager::get_singleton();
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CPSample_ID id;
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switch (aux_sample_properties) {
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case (0): // 8 bits, mono
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case (IT_SAMPLE_16BITS): // 16 bits mono
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case (IT_SAMPLE_STEREO): // 8 bits stereo
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case (IT_SAMPLE_16BITS|IT_SAMPLE_STEREO): { // 16 bits mono
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id=sm->create(p_sample_data.is16bit,p_sample_data.stereo,p_sample_data.length);
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if (id.is_null())
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break;
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sm->lock_data(id);
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int16_t *ptr16 = (int16_t*)sm->get_data(id);
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int8_t *ptr8=(int8_t*)ptr16;
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int chans=p_sample_data.stereo?2:1;
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if (p_sample_data.is16bit) {
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for (int c=0;c<chans;c++) {
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for (int i=0;i<p_sample_data.length;i++) {
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ptr16[i*chans+c]=file->get_word();
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}
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}
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} else {
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for (int c=0;c<chans;c++) {
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for (int i=0;i<p_sample_data.length;i++) {
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ptr8[i*chans+c]=file->get_byte();
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}
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}
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}
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sm->unlock_data(id);
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} break;
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case (IT_SAMPLE_COMPRESSED): { // 8 bits compressed
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id=sm->create(false,false,p_sample_data.length);
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if (id.is_null())
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break;
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sm->lock_data(id);
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if ( load_sample_8bits_IT_compressed((void*)sm->get_data( id),p_sample_data.length) ) {
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sm->unlock_data(id);
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sm->destroy(id);
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break;
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}
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sm->unlock_data(id);
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} break;
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case (IT_SAMPLE_16BITS|IT_SAMPLE_COMPRESSED): { // 16 bits compressed
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id=sm->create(true,false,p_sample_data.length);
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if (id.is_null())
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break;
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sm->lock_data(id);
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if ( load_sample_16bits_IT_compressed((void*)sm->get_data(id),p_sample_data.length) ) {
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sm->unlock_data(id);
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sm->destroy(id);
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break;
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}
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sm->unlock_data(id);
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} break;
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default: {
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// I dont know how to handle stereo compressed, does that exist?
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} break;
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}
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return id;
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}
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CPLoader::Error CPLoader_IT::load_samples() {
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for (int i=0;i<header.smpnum;i++) {
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//seek to sample
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file->seek(0xC0+header.ordnum+header.insnum*4+i*4);
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uint32_t final_location=file->get_dword();
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file->seek( final_location );
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Error err=load_sample(song->get_sample(i));
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CP_ERR_COND_V(err,err);
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}
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if (file->eof_reached() || file->get_error())
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return FILE_CORRUPTED;
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return FILE_OK;
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}
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/* * NOTICE * NOTICE * NOTICE * NOTICE * NOTICE * NOTICE * NOTICE * NOTICE * NOTICE * NOTICE * NOTICE
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-The following sample decompression code is based on xmp's code.(http://xmp.helllabs.org) which is based in openCP code.
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* NOTICE * NOTICE * NOTICE * NOTICE * NOTICE * NOTICE * NOTICE * NOTICE * NOTICE * NOTICE * NOTICE */
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uint32_t CPLoader_IT::read_n_bits_from_IT_compressed_block (uint8_t p_bits_to_read) {
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uint32_t aux_return_value;
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uint32_t val;
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uint8_t *buffer=(uint8_t*)source_position;
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if ( p_bits_to_read <= source_remaining_bits ) {
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val=buffer[3];
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val<<=8;
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val|=buffer[2];
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val<<=8;
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val|=buffer[1];
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val<<=8;
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val|=buffer[0];
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aux_return_value = val & ((1 << p_bits_to_read) - 1);
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val >>= p_bits_to_read;
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source_remaining_bits -= p_bits_to_read;
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buffer[3]=val>>24;
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buffer[2]=(val>>16)&0xFF;
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buffer[1]=(val>>8)&0xFF;
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buffer[0]=(val)&0xFF;
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} else {
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aux_return_value=buffer[3];
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aux_return_value<<=8;
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aux_return_value|=buffer[2];
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aux_return_value<<=8;
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aux_return_value|=buffer[1];
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aux_return_value<<=8;
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aux_return_value|=buffer[0];
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uint32_t nbits = p_bits_to_read - source_remaining_bits;
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source_position++;
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buffer+=4;
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val=buffer[3];
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val<<=8;
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val|=buffer[2];
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val<<=8;
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val|=buffer[1];
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val<<=8;
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val|=buffer[0];
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aux_return_value |= ((val & ((1 << nbits) - 1)) << source_remaining_bits);
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val >>= nbits;
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source_remaining_bits = 32 - nbits;
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buffer[3]=val>>24;
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buffer[2]=(val>>16)&0xFF;
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buffer[1]=(val>>8)&0xFF;
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buffer[0]=(val)&0xFF;
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}
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return aux_return_value;
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}
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bool CPLoader_IT::read_IT_compressed_block (bool p_16bits) {
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uint16_t size;
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size=file->get_word();
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if (file->eof_reached() || file->get_error()) return true;
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pat_data = (uint8_t*)CP_ALLOC( 4* ((size >> 2) + 2) );
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if (!pat_data)
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return true;
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source_buffer=(uint32_t*)pat_data;
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file->get_byte_array((uint8_t*)source_buffer,size);
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if (file->eof_reached() || file->get_error()) {
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free_IT_compressed_block();
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return true;
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}
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source_position = source_buffer;
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source_remaining_bits = 32;
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return false;
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}
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void CPLoader_IT::free_IT_compressed_block () {
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if (pat_data) {
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CP_FREE(pat_data);
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pat_data=NULL;
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}
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}
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bool CPLoader_IT::load_sample_8bits_IT_compressed(void *p_dest_buffer,int p_buffsize) {
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int8_t *dest_buffer; /* destination buffer which will be returned */
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uint16_t block_length; /* length of compressed data block in samples */
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uint16_t block_position; /* position in block */
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uint8_t bit_width; /* actual "bit width" */
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uint16_t aux_value; /* value read from file to be processed */
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int8_t d1, d2; /* integrator buffers (d2 for it2.15) */
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int8_t *dest_position; /* position in output buffer */
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int8_t v; /* sample value */
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bool it215; // is this an it215 module?
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dest_buffer = (int8_t *) p_dest_buffer;
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if (dest_buffer==NULL)
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return true;
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for (int i=0;i<p_buffsize;i++)
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dest_buffer[i]=0;
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dest_position = dest_buffer;
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it215=(header.cmwt==0x215);
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/* now unpack data till the dest buffer is full */
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while (p_buffsize) {
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/* read a new block of compressed data and reset variables */
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if ( read_IT_compressed_block(false) ) {
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CP_PRINTERR("Out of memory decompressing IT CPSample");
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return true;
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}
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block_length = (p_buffsize < 0x8000) ? p_buffsize : 0x8000;
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block_position = 0;
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bit_width = 9; /* start with width of 9 bits */
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d1 = d2 = 0; /* reset integrator buffers */
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/* now uncompress the data block */
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while ( block_position < block_length ) {
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aux_value = read_n_bits_from_IT_compressed_block(bit_width); /* read bits */
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if ( bit_width < 7 ) { /* method 1 (1-6 bits) */
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if ( aux_value == (1 << (bit_width - 1)) ) { /* check for "100..." */
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aux_value = read_n_bits_from_IT_compressed_block(3) + 1; /* yes -> read new width; */
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bit_width = (aux_value < bit_width) ? aux_value : aux_value + 1;
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/* and expand it */
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continue; /* ... next value */
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}
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} else if ( bit_width < 9 ) { /* method 2 (7-8 bits) */
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uint8_t border = (0xFF >> (9 - bit_width)) - 4;
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/* lower border for width chg */
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if ( aux_value > border && aux_value <= (border + 8) ) {
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aux_value -= border; /* convert width to 1-8 */
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bit_width = (aux_value < bit_width) ? aux_value : aux_value + 1;
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/* and expand it */
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continue; /* ... next value */
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}
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} else if ( bit_width == 9 ) { /* method 3 (9 bits) */
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if ( aux_value & 0x100 ) { /* bit 8 set? */
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bit_width = (aux_value + 1) & 0xff; /* new width... */
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continue; /* ... and next value */
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}
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} else { /* illegal width, abort */
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free_IT_compressed_block();
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CP_PRINTERR("CPSample has illegal BitWidth ");
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return true;
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}
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/* now expand value to signed byte */
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if ( bit_width < 8 ) {
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uint8_t tmp_shift = 8 - bit_width;
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v=(aux_value << tmp_shift);
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v>>=tmp_shift;
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} else v = (int8_t) aux_value;
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/* integrate upon the sample values */
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d1 += v;
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d2 += d1;
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/* ... and store it into the buffer */
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*(dest_position++) = it215 ? d2 : d1;
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block_position++;
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}
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/* now subtract block lenght from total length and go on */
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free_IT_compressed_block();
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p_buffsize -= block_length;
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}
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|
return false;
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|
}
|
|
|
|
bool CPLoader_IT::load_sample_16bits_IT_compressed(void *p_dest_buffer,int p_buffsize) {
|
|
|
|
int16_t *dest_buffer; /* destination buffer which will be returned */
|
|
uint16_t block_length; /* length of compressed data block in samples */
|
|
uint16_t block_position; /* position in block */
|
|
uint8_t bit_width; /* actual "bit width" */
|
|
uint32_t aux_value; /* value read from file to be processed */
|
|
int16_t d1, d2; /* integrator buffers (d2 for it2.15) */
|
|
int16_t *dest_position; /* position in output buffer */
|
|
int16_t v; /* sample value */
|
|
|
|
bool it215; // is this an it215 module?
|
|
|
|
dest_buffer = (int16_t *) p_dest_buffer;
|
|
|
|
if (dest_buffer==NULL)
|
|
return true;
|
|
|
|
for (int i=0;i<p_buffsize;i++)
|
|
dest_buffer[i]=0;
|
|
|
|
dest_position = dest_buffer;
|
|
|
|
it215=(header.cmwt==0x215);
|
|
|
|
|
|
while (p_buffsize) {
|
|
/* read a new block of compressed data and reset variables */
|
|
if ( read_IT_compressed_block(true) ) {
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
block_length = (p_buffsize < 0x4000) ? p_buffsize : 0x4000;
|
|
|
|
block_position = 0;
|
|
|
|
bit_width = 17; /* start with width of 9 bits */
|
|
|
|
d1 = d2 = 0; /* reset integrator buffers */
|
|
|
|
while ( block_position < block_length ) {
|
|
|
|
aux_value = read_n_bits_from_IT_compressed_block(bit_width); /* read bits */
|
|
|
|
if ( bit_width < 7 ) { /* method 1 (1-6 bits) */
|
|
|
|
if ( (signed)aux_value == (1 << (bit_width - 1)) ) { /* check for "100..." */
|
|
|
|
aux_value = read_n_bits_from_IT_compressed_block(4) + 1; /* yes -> read new width; */
|
|
bit_width = (aux_value < bit_width) ? aux_value : aux_value + 1;
|
|
/* and expand it */
|
|
continue; /* ... next value */
|
|
}
|
|
|
|
} else if ( bit_width < 17 ) {
|
|
|
|
uint16_t border = (0xFFFF >> (17 - bit_width)) - 8;
|
|
|
|
if ( (int)aux_value > (int)border && (int)aux_value <= ((int)border + 16) ) {
|
|
|
|
aux_value -= border; /* convert width to 1-8 */
|
|
bit_width = (aux_value < bit_width) ? aux_value : aux_value + 1;
|
|
/* and expand it */
|
|
continue; /* ... next value */
|
|
}
|
|
|
|
|
|
} else if ( bit_width == 17 ) {
|
|
|
|
if ( aux_value & 0x10000 ) { /* bit 8 set? */
|
|
|
|
bit_width = (aux_value + 1) & 0xff; /* new width... */
|
|
continue; /* ... and next value */
|
|
}
|
|
|
|
} else { /* illegal width, abort */
|
|
|
|
CP_PRINTERR("CPSample has illegal BitWidth ");
|
|
|
|
free_IT_compressed_block();
|
|
|
|
return true;
|
|
}
|
|
|
|
/* now expand value to signed byte */
|
|
if ( bit_width < 16 ) {
|
|
|
|
uint8_t tmp_shift = 16 - bit_width;
|
|
|
|
v=(aux_value << tmp_shift);
|
|
v>>=tmp_shift;
|
|
|
|
} else v = (int16_t) aux_value;
|
|
|
|
/* integrate upon the sample values */
|
|
d1 += v;
|
|
d2 += d1;
|
|
|
|
/* ... and store it into the buffer */
|
|
*(dest_position++) = it215 ? d2 : d1;
|
|
block_position++;
|
|
|
|
}
|
|
|
|
/* now subtract block lenght from total length and go on */
|
|
free_IT_compressed_block();
|
|
p_buffsize -= block_length;
|
|
}
|
|
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
|
|