Holger Wirtz
1 year ago
parent
78c82d3dac
commit
af079021a7
@ -1,23 +0,0 @@ |
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#!/bin/bash |
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WAV2SKETCH="${HOME}/Arduino-Teensy/MicroDexed/third-party/wav2sketch" |
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if [ ! -e "${WAV2SKETCH}" ] |
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then |
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gcc "${HOME}/Arduino-Teensy/MicroDexed/third-party/wav2sketch.c" -o "${WAV2SKETCH}" |
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chmod 700 "${WAV2SKETCH}" |
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fi |
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"${WAV2SKETCH}" -16 |
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rm *.h |
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rm -f drumset.h |
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touch drumset.h |
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for i in `ls -1 *.cpp` |
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do |
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echo "# ${i}" >> drumset.h |
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cat "${i}" | grep '^[A-Za-z0-9]' >> drumset.h |
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echo "" >> drumset.h |
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rm "${i}" |
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done |
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@ -1,356 +0,0 @@ |
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// Convert a set of WAV audio files to C data arrays for the Teensy3 Audio Library
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// Copyright 2014, Paul Stoffregen (paul@pjrc.com)
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// 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, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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// compile with: gcc -O2 -Wall -o wav2sketch wav2sketch.c
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// i686-w64-mingw32-gcc -s -O2 -Wall wav2sketch.c -o wav2sketch.exe
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <stdint.h> |
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#include <stdarg.h> |
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#include <string.h> |
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#include <ctype.h> |
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#include <sys/types.h> |
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#include <sys/stat.h> |
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#include <dirent.h> |
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uint8_t ulaw_encode(int16_t audio); |
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void print_byte(FILE *out, uint8_t b); |
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void filename2samplename(void); |
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uint32_t padding(uint32_t length, uint32_t block); |
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uint8_t read_uint8(FILE *in); |
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int16_t read_int16(FILE *in); |
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uint32_t read_uint32(FILE *in); |
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void die(const char *format, ...) __attribute__ ((format (printf, 1, 2))); |
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// WAV file format:
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// http://www-mmsp.ece.mcgill.ca/Documents/AudioFormats/WAVE/WAVE.html
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const char *filename=""; |
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char samplename[64]; |
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unsigned int bcount, wcount; |
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unsigned int total_length=0; |
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int pcm_mode=0; |
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void wav2c(FILE *in, FILE *out, FILE *outh) |
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{ |
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uint32_t header[4]; |
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int16_t format, channels, bits; |
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uint32_t rate; |
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uint32_t i, length, padlength=0, arraylen; |
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uint32_t chunkSize; |
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int32_t audio=0; |
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// read the WAV file's header
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for (i=0; i < 4; i++) { |
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header[i] = read_uint32(in); |
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} |
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while (header[3] != 0x20746D66) { |
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// skip past unknown sections until "fmt "
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chunkSize = read_uint32(in); |
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for (i=0; i < chunkSize; i++) { |
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read_uint8(in); |
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} |
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header[3] = read_uint32(in); |
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} |
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chunkSize = read_uint32(in); |
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// read the audio format parameters
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format = read_int16(in); |
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channels = read_int16(in); |
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rate = read_uint32(in); |
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read_uint32(in); // ignore byterate
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read_int16(in); // ignore blockalign
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bits = read_int16(in); |
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//printf("format: %d, channels: %d, rate: %d, bits %d\n", format, channels, rate, bits);
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if (format != 1) |
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die("file %s is compressed, only uncompressed supported", filename); |
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if (rate != 44100 && rate != 22050 && rate != 11025 /*&& rate != 8000*/ ) |
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die("sample rate %d in %s is unsupported\n" |
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"Only 44100, 22050, 11025 work", rate, filename); |
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if (channels != 1 && channels != 2) |
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die("file %s has %d channels, but only 1 & 2 are supported", filename, channels); |
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if (bits != 16) |
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die("file %s has %d bit format, but only 16 is supported", filename, bits); |
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// skip past any extra data on the WAVE header (hopefully it doesn't matter?)
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for (chunkSize -= 16; chunkSize > 0; chunkSize--) { |
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read_uint8(in); |
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} |
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// read the data header, skip non-audio data
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while (1) { |
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header[0] = read_uint32(in); |
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length = read_uint32(in); |
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if (header[0] == 0x61746164) break; // beginning of actual audio data
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// skip over non-audio data
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for (i=0; i < length; i++) { |
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read_uint8(in); |
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} |
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} |
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// the length must be a multiple of the data size
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if (channels == 2) { |
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if (length % 4) die("file %s data length is not a multiple of 4", filename); |
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length = length / 4; |
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} |
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if (channels == 1) { |
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if (length % 1) die("file %s data length is not a multiple of 2", filename); |
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length = length / 2; |
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} |
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if (length > 0xFFFFFF) die("file %s data length is too long", filename); |
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bcount = 0; |
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// AudioPlayMemory requires padding to 2.9 ms boundary (128 samples @ 44100)
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if (rate == 44100) { |
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padlength = padding(length, 128); |
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format = 1; |
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} else if (rate == 22050) { |
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padlength = padding(length, 64); |
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format = 2; |
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} else if (rate == 11025) { |
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padlength = padding(length, 32); |
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format = 3; |
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} |
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if (pcm_mode) { |
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arraylen = ((length + padlength) * 2 + 3) / 4 + 1; |
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format |= 0x80; |
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} else { |
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arraylen = (length + padlength + 3) / 4 + 1; |
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} |
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total_length += arraylen; |
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// output a minimal header, just the length, #bits and sample rate
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fprintf(outh, "extern const unsigned int AudioSample%s[%d];\n", samplename, arraylen);
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fprintf(out, "// Converted from %s, using %d Hz, %s encoding\n", filename, rate, |
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(pcm_mode ? "16 bit PCM" : "u-law")); |
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fprintf(out, "PROGMEM const unsigned int AudioSample%s[%d] = {\n", samplename, arraylen); |
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fprintf(out, "0x%08X,", length | (format << 24)); |
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wcount = 1; |
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// finally, read the audio data
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while (length > 0) { |
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if (channels == 1) { |
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audio = read_int16(in); |
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} else { |
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audio = read_int16(in); |
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audio += read_int16(in); |
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audio /= 2; |
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} |
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if (pcm_mode) { |
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print_byte(out, audio); |
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print_byte(out, audio >> 8); |
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} else { |
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print_byte(out, ulaw_encode(audio)); |
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} |
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length--; |
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} |
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while (padlength > 0) { |
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print_byte(out, 0); |
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padlength--; |
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} |
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while (bcount > 0) { |
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print_byte(out, 0); |
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} |
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if (wcount > 0) fprintf(out, "\n"); |
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fprintf(out, "};\n"); |
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} |
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uint8_t ulaw_encode(int16_t audio) |
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{ |
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uint32_t mag, neg; |
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// http://en.wikipedia.org/wiki/G.711
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if (audio >= 0) { |
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mag = audio; |
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neg = 0; |
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} else { |
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mag = audio * -1; |
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neg = 0x80; |
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} |
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mag += 128; |
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if (mag > 0x7FFF) mag = 0x7FFF; |
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if (mag >= 0x4000) return neg | 0x70 | ((mag >> 10) & 0x0F); // 01wx yz00 0000 0000
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if (mag >= 0x2000) return neg | 0x60 | ((mag >> 9) & 0x0F); // 001w xyz0 0000 0000
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if (mag >= 0x1000) return neg | 0x50 | ((mag >> 8) & 0x0F); // 0001 wxyz 0000 0000
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if (mag >= 0x0800) return neg | 0x40 | ((mag >> 7) & 0x0F); // 0000 1wxy z000 0000
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if (mag >= 0x0400) return neg | 0x30 | ((mag >> 6) & 0x0F); // 0000 01wx yz00 0000
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if (mag >= 0x0200) return neg | 0x20 | ((mag >> 5) & 0x0F); // 0000 001w xyz0 0000
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if (mag >= 0x0100) return neg | 0x10 | ((mag >> 4) & 0x0F); // 0000 0001 wxyz 0000
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else return neg | 0x00 | ((mag >> 3) & 0x0F); // 0000 0000 1wxy z000
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} |
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// compute the extra padding needed
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uint32_t padding(uint32_t length, uint32_t block) |
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{ |
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uint32_t extra; |
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extra = length % block; |
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if (extra == 0) return 0; |
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return block - extra; |
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} |
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// pack the output bytes into 32 bit words, lsb first, and
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// format the data nicely with commas and newlines
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void print_byte(FILE *out, uint8_t b) |
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{ |
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static uint32_t buf32=0; |
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buf32 |= (b << (8 * bcount++)); |
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if (bcount >= 4) { |
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fprintf(out, "0x%08X,", buf32); |
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buf32 = 0; |
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bcount = 0; |
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if (++wcount >= 8) { |
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fprintf(out, "\n"); |
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wcount = 0; |
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} |
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} |
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} |
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// convert the WAV filename into a C-compatible name
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void filename2samplename(void) |
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{ |
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int len, i, n; |
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char c; |
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len = strlen(filename) - 4; |
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if (len >= sizeof(samplename)-1) len = sizeof(samplename)-1; |
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for (i=0, n=0; n < len; i++) { |
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c = filename[i]; |
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if (isalpha(c) || c == '_' || (isdigit(c) && n > 0)) { |
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samplename[n] = (n == 0) ? toupper(c) : tolower(c); |
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n++; |
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} |
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} |
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samplename[n] = 0; |
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} |
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const char *title = "// Audio data converted from WAV file by wav2sketch\n\n"; |
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int main(int argc, char **argv) |
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{ |
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DIR *dir; |
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struct dirent *f; |
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struct stat s; |
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FILE *fp, *outc=NULL, *outh=NULL; |
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char buf[128]; |
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int i, len; |
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// By default, audio is u-law encoded to reduce the memory requirement
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// in half. However, u-law does add distortion. If "-16" is specified
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// on the command line, the original 16 bit PCM samples are used.
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for (i=1; i < argc; i++) { |
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if (strcmp(argv[i], "-16") == 0) pcm_mode = 1; |
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} |
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dir = opendir("."); |
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if (!dir) die("unable to open directory"); |
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while (1) { |
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f = readdir(dir); |
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if (!f) break; |
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//if ((f->d_type & DT_DIR)) continue; // skip directories
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//if (!(f->d_type & DT_REG)) continue; // skip special files
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if (stat(f->d_name, &s) < 0) continue; // skip if unable to stat
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if (S_ISDIR(s.st_mode)) continue; // skip directories
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if (!S_ISREG(s.st_mode)) continue; // skip special files
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filename = f->d_name; |
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len = strlen(filename); |
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if (len < 5) continue; |
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if (strcasecmp(filename + len - 4, ".wav") != 0) continue; |
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fp = fopen(filename, "rb"); |
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if (!fp) die("unable to read file %s", filename); |
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filename2samplename(); |
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printf("converting: %s --> AudioSample%s\n", filename, samplename); |
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snprintf(buf, sizeof(buf), "AudioSample%s.cpp", samplename); |
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outc = fopen(buf, "w"); |
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if (outc == NULL) die("unable to write %s", buf); |
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snprintf(buf, sizeof(buf), "AudioSample%s.h", samplename); |
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outh = fopen(buf, "w"); |
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if (outh == NULL) die("unable to write %s\n", buf); |
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fprintf(outh, "%s", title); |
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fprintf(outc, "%s", title); |
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fprintf(outc, "#include <Arduino.h>\n"); |
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fprintf(outc, "#include \"%s\"\n\n", buf); |
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wav2c(fp, outc, outh); |
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//wav2c(fp, stdout, stdout);
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fclose(outc); |
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fclose(outh); |
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fclose(fp); |
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} |
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printf("Total data size %d bytes\n", total_length * 4); |
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return 0; |
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} |
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uint8_t read_uint8(FILE *in) |
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{ |
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int c1; |
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c1 = fgetc(in); |
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if (c1 == EOF) die("error, end of data while reading from %s\n", filename); |
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c1 &= 255; |
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return c1; |
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} |
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int16_t read_int16(FILE *in) |
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{ |
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int c1, c2; |
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c1 = fgetc(in); |
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if (c1 == EOF) die("error, end of data while reading from %s\n", filename); |
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c2 = fgetc(in); |
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if (c2 == EOF) die("error, end of data while reading from %s\n", filename); |
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c1 &= 255; |
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c2 &= 255; |
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return (c2 << 8) | c1; |
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} |
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uint32_t read_uint32(FILE *in) |
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{ |
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int c1, c2, c3, c4; |
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c1 = fgetc(in); |
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if (c1 == EOF) die("error, end of data while reading from %s\n", filename); |
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c2 = fgetc(in); |
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if (c2 == EOF) die("error, end of data while reading from %s\n", filename); |
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c3 = fgetc(in); |
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if (c3 == EOF) die("error, end of data while reading from %s\n", filename); |
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c4 = fgetc(in); |
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if (c4 == EOF) die("error, end of data while reading from %s\n", filename); |
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c1 &= 255; |
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c2 &= 255; |
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c3 &= 255; |
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c4 &= 255; |
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return (c4 << 24) | (c3 << 16) | (c2 << 8) | c1; |
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} |
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void die(const char *format, ...) |
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{ |
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va_list args; |
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va_start(args, format); |
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fprintf(stderr, "wav2sketch: "); |
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vfprintf(stderr, format, args); |
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fprintf(stderr, "\n"); |
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exit(1); |
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} |
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