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Merge pull request #108 from pingdynasty/develop
Release v22.2
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/************************** BEGIN WaveReader.h **************************/ | ||
/************************************************************************ | ||
FAUST Architecture File | ||
Copyright (C) 2020 GRAME, Centre National de Creation Musicale | ||
--------------------------------------------------------------------- | ||
This Architecture section is free software; you can redistribute it | ||
and/or modify it under the terms of the GNU General Public License | ||
as published by the Free Software Foundation; either version 3 of | ||
the License, or (at your option) any later version. | ||
This program 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 for more details. | ||
You should have received a copy of the GNU General Public License | ||
along with this program; If not, see <http://www.gnu.org/licenses/>. | ||
EXCEPTION : As a special exception, you may create a larger work | ||
that contains this FAUST architecture section and distribute | ||
that work under terms of your choice, so long as this FAUST | ||
architecture section is not modified. | ||
************************************************************************/ | ||
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#ifndef __WaveReader__ | ||
#define __WaveReader__ | ||
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#undef min | ||
#undef max | ||
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#include <string> | ||
#include "Resource.h" | ||
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// WAVE file description | ||
class WaveFile { | ||
public: | ||
// The canonical WAVE format starts with the RIFF header | ||
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/** | ||
Variable: chunk_id | ||
Contains the letters "RIFF" in ASCII form (0x52494646 big-endian form). | ||
**/ | ||
int chunk_id; | ||
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/** | ||
Variable: chunk_size | ||
36 + SubChunk2Size, or more precisely: 4 + (8 + SubChunk1Size) + (8 + SubChunk2Size) | ||
This is the size of the rest of the chunk following this number. | ||
This is the size of the entire file in bytes minus 8 bytes for the | ||
two fields not included in this count: ChunkID and ChunkSize. | ||
**/ | ||
int chunk_size; | ||
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/** | ||
Variable: format | ||
Contains the letters "WAVE" (0x57415645 big-endian form). | ||
**/ | ||
int format; | ||
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// The "WAVE" format consists of two subchunks: "fmt " and "data": | ||
// The "fmt " subchunk describes the sound data's format: | ||
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/** | ||
Variable: subchunk_1_id | ||
Contains the letters "fmt " (0x666d7420 big-endian form). | ||
**/ | ||
int subchunk_1_id; | ||
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/** | ||
Variable: subchunk_1_size | ||
16 for PCM. This is the size of the rest of the Subchunk which follows this number. | ||
**/ | ||
int subchunk_1_size; | ||
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/** | ||
Variable: audio_format | ||
PCM = 1 (i.e. Linear quantization) Values other than 1 indicate some form of compression. | ||
**/ | ||
short audio_format; | ||
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/** | ||
Variable: num_channels | ||
Mono = 1, Stereo = 2, etc. | ||
**/ | ||
short num_channels; | ||
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/** | ||
Variable: sample_rate | ||
8000, 44100, etc. | ||
**/ | ||
int sample_rate; | ||
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/** | ||
Variable: byte_rate | ||
== SampleRate * NumChannels * BitsPerSample/8 | ||
**/ | ||
int byte_rate; | ||
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/** | ||
Variable: block_align | ||
== NumChannels * BitsPerSample/8 | ||
The number of bytes for one sample including all channels. I wonder what happens | ||
when this number isn't an integer? | ||
**/ | ||
short block_align; | ||
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/** | ||
Variable: bits_per_sample | ||
8 bits = 8, 16 bits = 16, etc. | ||
**/ | ||
short bits_per_sample; | ||
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/** | ||
Here should come some extra parameters which i will avoid. | ||
**/ | ||
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// The "data" subchunk contains the size of the data and the actual sound: | ||
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/** | ||
Variable: subchunk_2_id | ||
Contains the letters "data" (0x64617461 big-endian form). | ||
**/ | ||
int subchunk_2_id; | ||
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/** | ||
Variable: subchunk_2_size | ||
== NumSamples * NumChannels * BitsPerSample/8 | ||
This is the number of bytes in the data. You can also think of this as the size | ||
of the read of the subchunk following this number. | ||
**/ | ||
int subchunk_2_size; | ||
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/** | ||
Variable: data | ||
The actual sound data. | ||
**/ | ||
char* data; | ||
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}; | ||
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// Base reader | ||
class WaveReader { | ||
public: | ||
WaveFile* fWave; | ||
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WaveReader() { | ||
fWave = new WaveFile(); | ||
} | ||
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virtual ~WaveReader() { | ||
if (fWave->data != NULL) | ||
delete[] fWave->data; | ||
delete fWave; | ||
} | ||
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bool loadWaveHeader() { | ||
char buffer[4]; | ||
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read(buffer, 4); | ||
if (strncmp(buffer, "RIFF", 4) != 0) { | ||
debugMessage("Not a valid WAV file!"); | ||
return false; | ||
} | ||
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fWave->chunk_id = toInt(buffer, 4); | ||
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read(buffer, 4); | ||
fWave->chunk_size = toInt(buffer, 4); | ||
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read(buffer, 4); | ||
fWave->format = toInt(buffer, 4); | ||
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read(buffer, 4); | ||
fWave->subchunk_1_id = toInt(buffer, 4); | ||
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read(buffer, 4); | ||
fWave->subchunk_1_size = toInt(buffer, 4); | ||
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read(buffer, 2); | ||
fWave->audio_format = toInt(buffer, 2); | ||
read(buffer, 2); | ||
fWave->num_channels = toInt(buffer, 2); | ||
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read(buffer, 4); | ||
fWave->sample_rate = toInt(buffer, 4); | ||
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read(buffer, 4); | ||
fWave->byte_rate = toInt(buffer, 4); | ||
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read(buffer, 2); | ||
fWave->block_align = toInt(buffer, 2); | ||
read(buffer, 2); | ||
fWave->bits_per_sample = toInt(buffer, 2); | ||
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read(buffer, 4); | ||
if (strncmp(buffer, "data", 4) != 0) { | ||
read(buffer, 4); | ||
int _extra_size = toInt(buffer, 4); | ||
char _extra_data[_extra_size]; | ||
read(_extra_data, _extra_size); | ||
read(buffer, 4); | ||
fWave->subchunk_2_id = toInt(buffer, 4); | ||
} else { | ||
fWave->subchunk_2_id = toInt(buffer, 4); | ||
} | ||
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read(buffer, 4); | ||
fWave->subchunk_2_size = toInt(buffer, 4); | ||
return true; | ||
} | ||
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void loadWave() | ||
{ | ||
// Read sound data | ||
fWave->data = new char[fWave->subchunk_2_size]; | ||
read(fWave->data, fWave->subchunk_2_size); | ||
} | ||
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virtual void read(char* buffer, unsigned int size) = 0; | ||
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protected: | ||
inline int toInt(char* buffer, int len) | ||
{ | ||
int a = 0; | ||
for(int i = 0; i < len; i++) { | ||
((char*)&a)[i] = buffer[i]; | ||
} | ||
return a; | ||
} | ||
}; | ||
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/* | ||
* WAV file reader that handles resource parser | ||
*/ | ||
class WaveResourceReader : public WaveReader { | ||
public: | ||
WaveResourceReader(const char* name) : | ||
offset(0) { | ||
resource = Resource::open(name); | ||
}; | ||
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~WaveResourceReader() { | ||
Resource::destroy(resource); | ||
}; | ||
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void read(char* buffer, unsigned int size) override { | ||
size_t read_len = resource->read((void*)buffer, size, offset); | ||
offset += read_len; | ||
} | ||
private: | ||
Resource* resource; | ||
size_t offset; | ||
}; | ||
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#endif | ||
/************************** END WaveReader.h **************************/ |
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