mirror of
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819 lines
30 KiB
C
819 lines
30 KiB
C
#ifndef ARDUINO
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////////////////////////////////////////////////////////////////////////////
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// **** ADPCM-XQ **** //
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// Xtreme Quality ADPCM Encoder/Decoder //
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// Copyright (c) 2022 David Bryant. //
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// All Rights Reserved. //
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// Distributed under the BSD Software License (see license.txt) //
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////////////////////////////////////////////////////////////////////////////
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include "adpcm-lib.h"
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// This runtime macro is not strictly needed because the code is endian-safe,
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// but including it improves performance on little-endian systems because we
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// can avoid a couple loops through the audio.
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#define IS_BIG_ENDIAN (*(uint16_t *)"\0\xff" < 0x0100)
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static const char *sign_on = "\n"
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" ADPCM-XQ Xtreme Quality IMA-ADPCM WAV Encoder / Decoder Version 0.4\n"
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" Copyright (c) 2022 David Bryant. All Rights Reserved.\n\n";
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static const char *usage =
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" Usage: ADPCM-XQ [-options] infile.wav outfile.wav\n\n"
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" Operation: conversion is performed based on the type of the infile\n"
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" (either encode 16-bit PCM to 4-bit IMA-ADPCM or decode back)\n\n"
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" Options: -[0-8] = encode lookahead samples (default = 3)\n"
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" -bn = override auto block size, 2^n bytes (n = 8-15)\n"
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" -d = decode only (fail on WAV file already PCM)\n"
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" -e = encode only (fail on WAV file already ADPCM)\n"
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" -f = encode flat noise (no dynamic noise shaping)\n"
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" -h = display this help message\n"
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" -q = quiet mode (display errors only)\n"
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" -r = raw output (little-endian, no WAV header written)\n"
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" -v = verbose (display lots of info)\n"
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" -y = overwrite outfile if it exists\n\n"
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" Web: Visit www.github.com/dbry/adpcm-xq for latest version and info\n\n";
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#define ADPCM_FLAG_NOISE_SHAPING 0x1
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#define ADPCM_FLAG_RAW_OUTPUT 0x2
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static int adpcm_converter (char *infilename, char *outfilename, int flags, int blocksize_pow2, int lookahead);
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static int verbosity = 0, decode_only = 0, encode_only = 0;
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int main (argc, argv) int argc; char **argv;
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{
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int lookahead = 3, flags = ADPCM_FLAG_NOISE_SHAPING, blocksize_pow2 = 0, overwrite = 0, asked_help = 0;
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char *infilename = NULL, *outfilename = NULL;
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FILE *outfile;
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// if the name of the executable ends in "encoder" or "decoder", just do that function
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encode_only = argc && strstr (argv [0], "encoder") && strlen (strstr (argv [0], "encoder")) == strlen ("encoder");
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decode_only = argc && strstr (argv [0], "decoder") && strlen (strstr (argv [0], "decoder")) == strlen ("decoder");
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// loop through command-line arguments
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while (--argc) {
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#if defined (_WIN32)
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if ((**++argv == '-' || **argv == '/') && (*argv)[1])
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#else
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if ((**++argv == '-') && (*argv)[1])
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#endif
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while (*++*argv)
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switch (**argv) {
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case '0': case '1': case '2':
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case '3': case '4': case '5':
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case '6': case '7': case '8':
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lookahead = **argv - '0';
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break;
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case 'B': case 'b':
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blocksize_pow2 = strtol (++*argv, argv, 10);
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if (blocksize_pow2 < 8 || blocksize_pow2 > 15) {
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fprintf (stderr, "\nblock size power must be 8 to 15!\n");
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return -1;
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}
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--*argv;
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break;
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case 'D': case 'd':
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decode_only = 1;
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break;
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case 'E': case 'e':
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encode_only = 1;
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break;
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case 'F': case 'f':
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flags &= ~ADPCM_FLAG_NOISE_SHAPING;
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break;
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case 'H': case 'h':
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asked_help = 0;
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break;
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case 'Q': case 'q':
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verbosity = -1;
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break;
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case 'R': case 'r':
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flags |= ADPCM_FLAG_RAW_OUTPUT;
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break;
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case 'V': case 'v':
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verbosity = 1;
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break;
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case 'Y': case 'y':
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overwrite = 1;
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break;
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default:
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fprintf (stderr, "\nillegal option: %c !\n", **argv);
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return 1;
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}
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else if (!infilename) {
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infilename = malloc (strlen (*argv) + 10);
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strcpy (infilename, *argv);
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}
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else if (!outfilename) {
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outfilename = malloc (strlen (*argv) + 10);
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strcpy (outfilename, *argv);
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}
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else {
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fprintf (stderr, "\nextra unknown argument: %s !\n", *argv);
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return 1;
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}
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}
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if (verbosity >= 0)
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fprintf (stderr, "%s", sign_on);
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if (!outfilename || asked_help) {
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printf ("%s", usage);
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return 0;
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}
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if (!strcmp (infilename, outfilename)) {
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fprintf (stderr, "can't overwrite input file (specify different/new output file name)\n");
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return -1;
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}
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if (!overwrite && (outfile = fopen (outfilename, "r"))) {
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fclose (outfile);
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fprintf (stderr, "output file \"%s\" exists (use -y to overwrite)\n", outfilename);
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return -1;
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}
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return adpcm_converter (infilename, outfilename, flags, blocksize_pow2, lookahead);
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}
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typedef struct {
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char ckID [4];
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uint32_t ckSize;
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char formType [4];
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} RiffChunkHeader;
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typedef struct {
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char ckID [4];
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uint32_t ckSize;
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} ChunkHeader;
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#define ChunkHeaderFormat "4L"
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typedef struct {
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uint16_t FormatTag, NumChannels;
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uint32_t SampleRate, BytesPerSecond;
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uint16_t BlockAlign, BitsPerSample;
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uint16_t cbSize;
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union {
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uint16_t ValidBitsPerSample;
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uint16_t SamplesPerBlock;
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uint16_t Reserved;
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} Samples;
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int32_t ChannelMask;
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uint16_t SubFormat;
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char GUID [14];
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} WaveHeader;
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#define WaveHeaderFormat "SSLLSSSSLS"
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typedef struct {
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char ckID [4];
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uint32_t ckSize;
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uint32_t TotalSamples;
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} FactHeader;
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#define FactHeaderFormat "4LL"
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#define WAVE_FORMAT_PCM 0x1
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#define WAVE_FORMAT_IMA_ADPCM 0x11
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#define WAVE_FORMAT_EXTENSIBLE 0xfffe
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static int write_pcm_wav_header (FILE *outfile, int num_channels, uint32_t num_samples, uint32_t sample_rate);
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static int write_adpcm_wav_header (FILE *outfile, int num_channels, uint32_t num_samples, uint32_t sample_rate, int samples_per_block);
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static int adpcm_decode_data (FILE *infile, FILE *outfile, int num_channels, uint32_t num_samples, int block_size);
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static int adpcm_encode_data (FILE *infile, FILE *outfile, int num_channels, uint32_t num_samples, int samples_per_block, int lookahead, int noise_shaping);
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static void little_endian_to_native (void *data, char *format);
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static void native_to_little_endian (void *data, char *format);
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static int adpcm_converter (char *infilename, char *outfilename, int flags, int blocksize_pow2, int lookahead)
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{
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int format = 0, res = 0, bits_per_sample, num_channels;
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uint32_t fact_samples = 0, num_samples = 0, sample_rate;
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FILE *infile, *outfile;
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RiffChunkHeader riff_chunk_header;
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ChunkHeader chunk_header;
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WaveHeader WaveHeader;
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if (!(infile = fopen (infilename, "rb"))) {
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fprintf (stderr, "can't open file \"%s\" for reading!\n", infilename);
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return -1;
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}
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// read initial RIFF form header
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if (!fread (&riff_chunk_header, sizeof (RiffChunkHeader), 1, infile) ||
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strncmp (riff_chunk_header.ckID, "RIFF", 4) ||
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strncmp (riff_chunk_header.formType, "WAVE", 4)) {
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fprintf (stderr, "\"%s\" is not a valid .WAV file!\n", infilename);
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return -1;
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}
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// loop through all elements of the RIFF wav header (until the data chuck)
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while (1) {
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if (!fread (&chunk_header, sizeof (ChunkHeader), 1, infile)) {
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fprintf (stderr, "\"%s\" is not a valid .WAV file!\n", infilename);
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return -1;
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}
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little_endian_to_native (&chunk_header, ChunkHeaderFormat);
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// if it's the format chunk, we want to get some info out of there and
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// make sure it's a .wav file we can handle
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if (!strncmp (chunk_header.ckID, "fmt ", 4)) {
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int supported = 1;
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if (chunk_header.ckSize < 16 || chunk_header.ckSize > sizeof (WaveHeader) ||
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!fread (&WaveHeader, chunk_header.ckSize, 1, infile)) {
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fprintf (stderr, "\"%s\" is not a valid .WAV file!\n", infilename);
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return -1;
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}
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little_endian_to_native (&WaveHeader, WaveHeaderFormat);
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format = (WaveHeader.FormatTag == WAVE_FORMAT_EXTENSIBLE && chunk_header.ckSize == 40) ?
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WaveHeader.SubFormat : WaveHeader.FormatTag;
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bits_per_sample = (chunk_header.ckSize == 40 && WaveHeader.Samples.ValidBitsPerSample) ?
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WaveHeader.Samples.ValidBitsPerSample : WaveHeader.BitsPerSample;
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if (WaveHeader.NumChannels < 1 || WaveHeader.NumChannels > 2)
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supported = 0;
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else if (format == WAVE_FORMAT_PCM) {
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if (decode_only) {
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fprintf (stderr, "\"%s\" is PCM .WAV file, invalid in decode-only mode!\n", infilename);
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return -1;
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}
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if (bits_per_sample < 9 || bits_per_sample > 16)
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supported = 0;
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if (WaveHeader.BlockAlign != WaveHeader.NumChannels * 2)
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supported = 0;
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}
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else if (format == WAVE_FORMAT_IMA_ADPCM) {
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if (encode_only) {
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fprintf (stderr, "\"%s\" is ADPCM .WAV file, invalid in encode-only mode!\n", infilename);
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return -1;
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}
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if (bits_per_sample != 4)
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supported = 0;
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if (WaveHeader.Samples.SamplesPerBlock != (WaveHeader.BlockAlign - WaveHeader.NumChannels * 4) * (WaveHeader.NumChannels ^ 3) + 1) {
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fprintf (stderr, "\"%s\" is not a valid .WAV file!\n", infilename);
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return -1;
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}
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}
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else
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supported = 0;
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if (!supported) {
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fprintf (stderr, "\"%s\" is an unsupported .WAV format!\n", infilename);
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return -1;
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}
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if (verbosity > 0) {
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fprintf (stderr, "format tag size = %d\n", chunk_header.ckSize);
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fprintf (stderr, "FormatTag = 0x%x, NumChannels = %u, BitsPerSample = %u\n",
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WaveHeader.FormatTag, WaveHeader.NumChannels, WaveHeader.BitsPerSample);
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fprintf (stderr, "BlockAlign = %u, SampleRate = %lu, BytesPerSecond = %lu\n",
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WaveHeader.BlockAlign, (unsigned long) WaveHeader.SampleRate, (unsigned long) WaveHeader.BytesPerSecond);
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if (chunk_header.ckSize > 16) {
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if (format == WAVE_FORMAT_PCM)
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fprintf (stderr, "cbSize = %d, ValidBitsPerSample = %d\n", WaveHeader.cbSize,
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WaveHeader.Samples.ValidBitsPerSample);
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else if (format == WAVE_FORMAT_IMA_ADPCM)
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fprintf (stderr, "cbSize = %d, SamplesPerBlock = %d\n", WaveHeader.cbSize,
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WaveHeader.Samples.SamplesPerBlock);
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}
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if (chunk_header.ckSize > 20)
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fprintf (stderr, "ChannelMask = %x, SubFormat = %d\n",
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WaveHeader.ChannelMask, WaveHeader.SubFormat);
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}
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}
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else if (!strncmp (chunk_header.ckID, "fact", 4)) {
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if (chunk_header.ckSize < 4 || !fread (&fact_samples, sizeof (fact_samples), 1, infile)) {
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fprintf (stderr, "\"%s\" is not a valid .WAV file!\n", infilename);
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return -1;
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}
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little_endian_to_native (&fact_samples, "L");
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if (chunk_header.ckSize > 4) {
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int bytes_to_skip = chunk_header.ckSize - 4;
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char dummy;
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while (bytes_to_skip--)
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if (!fread (&dummy, 1, 1, infile)) {
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fprintf (stderr, "\"%s\" is not a valid .WAV file!\n", infilename);
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return -1;
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}
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}
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}
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else if (!strncmp (chunk_header.ckID, "data", 4)) {
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// on the data chunk, get size and exit parsing loop
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if (!WaveHeader.NumChannels) { // make sure we saw a "fmt" chunk...
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fprintf (stderr, "\"%s\" is not a valid .WAV file!\n", infilename);
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return -1;
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}
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if (!chunk_header.ckSize) {
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fprintf (stderr, "this .WAV file has no audio samples, probably is corrupt!\n");
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return -1;
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}
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if (format == WAVE_FORMAT_PCM) {
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if (chunk_header.ckSize % WaveHeader.BlockAlign) {
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fprintf (stderr, "\"%s\" is not a valid .WAV file!\n", infilename);
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return -1;
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}
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num_samples = chunk_header.ckSize / WaveHeader.BlockAlign;
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}
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else {
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uint32_t complete_blocks = chunk_header.ckSize / WaveHeader.BlockAlign;
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int leftover_bytes = chunk_header.ckSize % WaveHeader.BlockAlign;
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int samples_last_block;
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num_samples = complete_blocks * WaveHeader.Samples.SamplesPerBlock;
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if (leftover_bytes) {
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if (leftover_bytes % (WaveHeader.NumChannels * 4)) {
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fprintf (stderr, "\"%s\" is not a valid .WAV file!\n", infilename);
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return -1;
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}
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if (verbosity > 0) fprintf (stderr, "data chunk has %d bytes left over for final ADPCM block\n", leftover_bytes);
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samples_last_block = (leftover_bytes - (WaveHeader.NumChannels * 4)) * (WaveHeader.NumChannels ^ 3) + 1;
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num_samples += samples_last_block;
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}
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else
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samples_last_block = WaveHeader.Samples.SamplesPerBlock;
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if (fact_samples) {
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if (fact_samples < num_samples && fact_samples > num_samples - samples_last_block) {
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if (verbosity > 0) fprintf (stderr, "total samples reduced %lu by FACT chunk\n", (unsigned long) (num_samples - fact_samples));
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num_samples = fact_samples;
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}
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else if (WaveHeader.NumChannels == 2 && (fact_samples >>= 1) < num_samples && fact_samples > num_samples - samples_last_block) {
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if (verbosity > 0) fprintf (stderr, "num samples reduced %lu by [incorrect] FACT chunk\n", (unsigned long) (num_samples - fact_samples));
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num_samples = fact_samples;
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}
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}
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}
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if (!num_samples) {
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fprintf (stderr, "this .WAV file has no audio samples, probably is corrupt!\n");
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return -1;
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}
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if (verbosity > 0)
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fprintf (stderr, "num samples = %lu\n", (unsigned long) num_samples);
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num_channels = WaveHeader.NumChannels;
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sample_rate = WaveHeader.SampleRate;
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break;
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}
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else { // just ignore unknown chunks
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int bytes_to_eat = (chunk_header.ckSize + 1) & ~1L;
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char dummy;
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if (verbosity > 0)
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fprintf (stderr, "extra unknown chunk \"%c%c%c%c\" of %d bytes\n",
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chunk_header.ckID [0], chunk_header.ckID [1], chunk_header.ckID [2],
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chunk_header.ckID [3], chunk_header.ckSize);
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while (bytes_to_eat--)
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if (!fread (&dummy, 1, 1, infile)) {
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fprintf (stderr, "\"%s\" is not a valid .WAV file!\n", infilename);
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return -1;
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}
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}
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}
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if (!(outfile = fopen (outfilename, "wb"))) {
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fprintf (stderr, "can't open file \"%s\" for writing!\n", outfilename);
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return -1;
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}
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if (format == WAVE_FORMAT_PCM) {
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int block_size, samples_per_block;
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if (blocksize_pow2)
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block_size = 1 << blocksize_pow2;
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else
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block_size = 256 * num_channels * (sample_rate < 11000 ? 1 : sample_rate / 11000);
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samples_per_block = (block_size - num_channels * 4) * (num_channels ^ 3) + 1;
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if (verbosity > 0)
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fprintf (stderr, "each %d byte ADPCM block will contain %d samples * %d channels\n",
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block_size, samples_per_block, num_channels);
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if (!(flags & ADPCM_FLAG_RAW_OUTPUT) && !write_adpcm_wav_header (outfile, num_channels, num_samples, sample_rate, samples_per_block)) {
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fprintf (stderr, "can't write header to file \"%s\" !\n", outfilename);
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return -1;
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}
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if (verbosity >= 0) fprintf (stderr, "encoding PCM file \"%s\" to%sADPCM file \"%s\"...\n",
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infilename, (flags & ADPCM_FLAG_RAW_OUTPUT) ? " raw " : " ", outfilename);
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res = adpcm_encode_data (infile, outfile, num_channels, num_samples, samples_per_block, lookahead,
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(flags & ADPCM_FLAG_NOISE_SHAPING) ? (sample_rate > 64000 ? NOISE_SHAPING_STATIC : NOISE_SHAPING_DYNAMIC) : NOISE_SHAPING_OFF);
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}
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else if (format == WAVE_FORMAT_IMA_ADPCM) {
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if (!(flags & ADPCM_FLAG_RAW_OUTPUT) && !write_pcm_wav_header (outfile, num_channels, num_samples, sample_rate)) {
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fprintf (stderr, "can't write header to file \"%s\" !\n", outfilename);
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return -1;
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}
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if (verbosity >= 0) fprintf (stderr, "decoding ADPCM file \"%s\" to%sPCM file \"%s\"...\n",
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infilename, (flags & ADPCM_FLAG_RAW_OUTPUT) ? " raw " : " ", outfilename);
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res = adpcm_decode_data (infile, outfile, num_channels, num_samples, WaveHeader.BlockAlign);
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}
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fclose (outfile);
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fclose (infile);
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return res;
|
|
}
|
|
|
|
static int write_pcm_wav_header (FILE *outfile, int num_channels, uint32_t num_samples, uint32_t sample_rate)
|
|
{
|
|
RiffChunkHeader riffhdr;
|
|
ChunkHeader datahdr, fmthdr;
|
|
WaveHeader wavhdr;
|
|
|
|
int wavhdrsize = 16;
|
|
int bytes_per_sample = 2;
|
|
uint32_t total_data_bytes = num_samples * bytes_per_sample * num_channels;
|
|
|
|
memset (&wavhdr, 0, sizeof (wavhdr));
|
|
|
|
wavhdr.FormatTag = WAVE_FORMAT_PCM;
|
|
wavhdr.NumChannels = num_channels;
|
|
wavhdr.SampleRate = sample_rate;
|
|
wavhdr.BytesPerSecond = sample_rate * num_channels * bytes_per_sample;
|
|
wavhdr.BlockAlign = bytes_per_sample * num_channels;
|
|
wavhdr.BitsPerSample = 16;
|
|
|
|
strncpy (riffhdr.ckID, "RIFF", sizeof (riffhdr.ckID));
|
|
strncpy (riffhdr.formType, "WAVE", sizeof (riffhdr.formType));
|
|
riffhdr.ckSize = sizeof (riffhdr) + wavhdrsize + sizeof (datahdr) + total_data_bytes;
|
|
strncpy (fmthdr.ckID, "fmt ", sizeof (fmthdr.ckID));
|
|
fmthdr.ckSize = wavhdrsize;
|
|
|
|
strncpy (datahdr.ckID, "data", sizeof (datahdr.ckID));
|
|
datahdr.ckSize = total_data_bytes;
|
|
|
|
// write the RIFF chunks up to just before the data starts
|
|
|
|
native_to_little_endian (&riffhdr, ChunkHeaderFormat);
|
|
native_to_little_endian (&fmthdr, ChunkHeaderFormat);
|
|
native_to_little_endian (&wavhdr, WaveHeaderFormat);
|
|
native_to_little_endian (&datahdr, ChunkHeaderFormat);
|
|
|
|
return fwrite (&riffhdr, sizeof (riffhdr), 1, outfile) &&
|
|
fwrite (&fmthdr, sizeof (fmthdr), 1, outfile) &&
|
|
fwrite (&wavhdr, wavhdrsize, 1, outfile) &&
|
|
fwrite (&datahdr, sizeof (datahdr), 1, outfile);
|
|
}
|
|
|
|
static int write_adpcm_wav_header (FILE *outfile, int num_channels, uint32_t num_samples, uint32_t sample_rate, int samples_per_block)
|
|
{
|
|
RiffChunkHeader riffhdr;
|
|
ChunkHeader datahdr, fmthdr;
|
|
WaveHeader wavhdr;
|
|
FactHeader facthdr;
|
|
|
|
int wavhdrsize = 20;
|
|
int block_size = (samples_per_block - 1) / (num_channels ^ 3) + (num_channels * 4);
|
|
uint32_t num_blocks = num_samples / samples_per_block;
|
|
int leftover_samples = num_samples % samples_per_block;
|
|
uint32_t total_data_bytes = num_blocks * block_size;
|
|
|
|
if (leftover_samples) {
|
|
int last_block_samples = ((leftover_samples + 6) & ~7) + 1;
|
|
int last_block_size = (last_block_samples - 1) / (num_channels ^ 3) + (num_channels * 4);
|
|
total_data_bytes += last_block_size;
|
|
}
|
|
|
|
memset (&wavhdr, 0, sizeof (wavhdr));
|
|
|
|
wavhdr.FormatTag = WAVE_FORMAT_IMA_ADPCM;
|
|
wavhdr.NumChannels = num_channels;
|
|
wavhdr.SampleRate = sample_rate;
|
|
wavhdr.BytesPerSecond = sample_rate * block_size / samples_per_block;
|
|
wavhdr.BlockAlign = block_size;
|
|
wavhdr.BitsPerSample = 4;
|
|
wavhdr.cbSize = 2;
|
|
wavhdr.Samples.SamplesPerBlock = samples_per_block;
|
|
|
|
strncpy (riffhdr.ckID, "RIFF", sizeof (riffhdr.ckID));
|
|
strncpy (riffhdr.formType, "WAVE", sizeof (riffhdr.formType));
|
|
riffhdr.ckSize = sizeof (riffhdr) + wavhdrsize + sizeof (facthdr) + sizeof (datahdr) + total_data_bytes;
|
|
strncpy (fmthdr.ckID, "fmt ", sizeof (fmthdr.ckID));
|
|
fmthdr.ckSize = wavhdrsize;
|
|
strncpy (facthdr.ckID, "fact", sizeof (facthdr.ckID));
|
|
facthdr.TotalSamples = num_samples;
|
|
facthdr.ckSize = 4;
|
|
|
|
strncpy (datahdr.ckID, "data", sizeof (datahdr.ckID));
|
|
datahdr.ckSize = total_data_bytes;
|
|
|
|
// write the RIFF chunks up to just before the data starts
|
|
|
|
native_to_little_endian (&riffhdr, ChunkHeaderFormat);
|
|
native_to_little_endian (&fmthdr, ChunkHeaderFormat);
|
|
native_to_little_endian (&wavhdr, WaveHeaderFormat);
|
|
native_to_little_endian (&facthdr, FactHeaderFormat);
|
|
native_to_little_endian (&datahdr, ChunkHeaderFormat);
|
|
|
|
return fwrite (&riffhdr, sizeof (riffhdr), 1, outfile) &&
|
|
fwrite (&fmthdr, sizeof (fmthdr), 1, outfile) &&
|
|
fwrite (&wavhdr, wavhdrsize, 1, outfile) &&
|
|
fwrite (&facthdr, sizeof (facthdr), 1, outfile) &&
|
|
fwrite (&datahdr, sizeof (datahdr), 1, outfile);
|
|
}
|
|
|
|
static int adpcm_decode_data (FILE *infile, FILE *outfile, int num_channels, uint32_t num_samples, int block_size)
|
|
{
|
|
int samples_per_block = (block_size - num_channels * 4) * (num_channels ^ 3) + 1, percent;
|
|
void *pcm_block = malloc (samples_per_block * num_channels * 2);
|
|
void *adpcm_block = malloc (block_size);
|
|
uint32_t progress_divider = 0;
|
|
|
|
if (!pcm_block || !adpcm_block) {
|
|
fprintf (stderr, "could not allocate memory for buffers!\n");
|
|
return -1;
|
|
}
|
|
|
|
if (verbosity >= 0 && num_samples > 1000) {
|
|
progress_divider = (num_samples + 50) / 100;
|
|
fprintf (stderr, "\rprogress: %d%% ", percent = 0);
|
|
fflush (stderr);
|
|
}
|
|
|
|
while (num_samples) {
|
|
int this_block_adpcm_samples = samples_per_block;
|
|
int this_block_pcm_samples = samples_per_block;
|
|
|
|
if (this_block_adpcm_samples > num_samples) {
|
|
this_block_adpcm_samples = ((num_samples + 6) & ~7) + 1;
|
|
block_size = (this_block_adpcm_samples - 1) / (num_channels ^ 3) + (num_channels * 4);
|
|
this_block_pcm_samples = num_samples;
|
|
}
|
|
|
|
if (!fread (adpcm_block, block_size, 1, infile)) {
|
|
fprintf (stderr, "could not read all audio data from input file!\n");
|
|
return -1;
|
|
}
|
|
|
|
if (adpcm_decode_block (pcm_block, adpcm_block, block_size, num_channels) != this_block_adpcm_samples) {
|
|
fprintf (stderr, "adpcm_decode_block() did not return expected value!\n");
|
|
return -1;
|
|
}
|
|
|
|
if (IS_BIG_ENDIAN) {
|
|
int scount = this_block_pcm_samples * num_channels;
|
|
unsigned char *cp = (unsigned char *) pcm_block;
|
|
|
|
while (scount--) {
|
|
int16_t temp = * (int16_t *) cp;
|
|
*cp++ = (unsigned char) temp;
|
|
*cp++ = (unsigned char) (temp >> 8);
|
|
}
|
|
}
|
|
|
|
if (!fwrite (pcm_block, this_block_pcm_samples * num_channels * 2, 1, outfile)) {
|
|
fprintf (stderr, "could not write all audio data to output file!\n");
|
|
return -1;
|
|
}
|
|
|
|
num_samples -= this_block_pcm_samples;
|
|
|
|
if (progress_divider) {
|
|
int new_percent = 100 - num_samples / progress_divider;
|
|
|
|
if (new_percent != percent) {
|
|
fprintf (stderr, "\rprogress: %d%% ", percent = new_percent);
|
|
fflush (stderr);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (verbosity >= 0)
|
|
fprintf (stderr, "\r...completed successfully\n");
|
|
|
|
free (adpcm_block);
|
|
free (pcm_block);
|
|
return 0;
|
|
}
|
|
|
|
static int adpcm_encode_data (FILE *infile, FILE *outfile, int num_channels, uint32_t num_samples, int samples_per_block, int lookahead, int noise_shaping)
|
|
{
|
|
int block_size = (samples_per_block - 1) / (num_channels ^ 3) + (num_channels * 4), percent;
|
|
int16_t *pcm_block = malloc (samples_per_block * num_channels * 2);
|
|
void *adpcm_block = malloc (block_size);
|
|
uint32_t progress_divider = 0;
|
|
void *adpcm_cnxt = NULL;
|
|
|
|
if (!pcm_block || !adpcm_block) {
|
|
fprintf (stderr, "could not allocate memory for buffers!\n");
|
|
return -1;
|
|
}
|
|
|
|
if (verbosity >= 0 && num_samples > 1000) {
|
|
progress_divider = (num_samples + 50) / 100;
|
|
fprintf (stderr, "\rprogress: %d%% ", percent = 0);
|
|
fflush (stderr);
|
|
}
|
|
|
|
while (num_samples) {
|
|
int this_block_adpcm_samples = samples_per_block;
|
|
int this_block_pcm_samples = samples_per_block;
|
|
size_t num_bytes;
|
|
|
|
if (this_block_pcm_samples > num_samples) {
|
|
this_block_adpcm_samples = ((num_samples + 6) & ~7) + 1;
|
|
block_size = (this_block_adpcm_samples - 1) / (num_channels ^ 3) + (num_channels * 4);
|
|
this_block_pcm_samples = num_samples;
|
|
}
|
|
|
|
if (!fread (pcm_block, this_block_pcm_samples * num_channels * 2, 1, infile)) {
|
|
fprintf (stderr, "\rcould not read all audio data from input file!\n");
|
|
return -1;
|
|
}
|
|
|
|
if (IS_BIG_ENDIAN) {
|
|
int scount = this_block_pcm_samples * num_channels;
|
|
unsigned char *cp = (unsigned char *) pcm_block;
|
|
|
|
while (scount--) {
|
|
int16_t temp = cp [0] + (cp [1] << 8);
|
|
* (int16_t *) cp = temp;
|
|
cp += 2;
|
|
}
|
|
}
|
|
|
|
// if this is the last block and it's not full, duplicate the last sample(s) so we don't
|
|
// create problems for the lookahead
|
|
|
|
if (this_block_adpcm_samples > this_block_pcm_samples) {
|
|
int16_t *dst = pcm_block + this_block_pcm_samples * num_channels, *src = dst - num_channels;
|
|
int dups = (this_block_adpcm_samples - this_block_pcm_samples) * num_channels;
|
|
|
|
while (dups--)
|
|
*dst++ = *src++;
|
|
}
|
|
|
|
// if this is the first block, compute a decaying average (in reverse) so that we can let the
|
|
// encoder know what kind of initial deltas to expect (helps initializing index)
|
|
|
|
if (!adpcm_cnxt) {
|
|
int32_t average_deltas [2];
|
|
int i;
|
|
|
|
average_deltas [0] = average_deltas [1] = 0;
|
|
|
|
for (i = this_block_adpcm_samples * num_channels; i -= num_channels;) {
|
|
average_deltas [0] -= average_deltas [0] >> 3;
|
|
average_deltas [0] += abs ((int32_t) pcm_block [i] - pcm_block [i - num_channels]);
|
|
|
|
if (num_channels == 2) {
|
|
average_deltas [1] -= average_deltas [1] >> 3;
|
|
average_deltas [1] += abs ((int32_t) pcm_block [i-1] - pcm_block [i+1]);
|
|
}
|
|
}
|
|
|
|
average_deltas [0] >>= 3;
|
|
average_deltas [1] >>= 3;
|
|
|
|
adpcm_cnxt = adpcm_create_context (num_channels, lookahead, noise_shaping, average_deltas);
|
|
}
|
|
|
|
adpcm_encode_block (adpcm_cnxt, adpcm_block, &num_bytes, pcm_block, this_block_adpcm_samples);
|
|
|
|
if (num_bytes != block_size) {
|
|
fprintf (stderr, "\radpcm_encode_block() did not return expected value (expected %d, got %d)!\n", block_size, (int) num_bytes);
|
|
return -1;
|
|
}
|
|
|
|
if (!fwrite (adpcm_block, block_size, 1, outfile)) {
|
|
fprintf (stderr, "\rcould not write all audio data to output file!\n");
|
|
return -1;
|
|
}
|
|
|
|
num_samples -= this_block_pcm_samples;
|
|
|
|
if (progress_divider) {
|
|
int new_percent = 100 - num_samples / progress_divider;
|
|
|
|
if (new_percent != percent) {
|
|
fprintf (stderr, "\rprogress: %d%% ", percent = new_percent);
|
|
fflush (stderr);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (verbosity >= 0)
|
|
fprintf (stderr, "\r...completed successfully\n");
|
|
|
|
if (adpcm_cnxt)
|
|
adpcm_free_context (adpcm_cnxt);
|
|
|
|
free (adpcm_block);
|
|
free (pcm_block);
|
|
return 0;
|
|
}
|
|
|
|
static void little_endian_to_native (void *data, char *format)
|
|
{
|
|
unsigned char *cp = (unsigned char *) data;
|
|
int32_t temp;
|
|
|
|
while (*format) {
|
|
switch (*format) {
|
|
case 'L':
|
|
temp = cp [0] + ((int32_t) cp [1] << 8) + ((int32_t) cp [2] << 16) + ((int32_t) cp [3] << 24);
|
|
* (int32_t *) cp = temp;
|
|
cp += 4;
|
|
break;
|
|
|
|
case 'S':
|
|
temp = cp [0] + (cp [1] << 8);
|
|
* (short *) cp = (short) temp;
|
|
cp += 2;
|
|
break;
|
|
|
|
default:
|
|
if (isdigit ((unsigned char) *format))
|
|
cp += *format - '0';
|
|
|
|
break;
|
|
}
|
|
|
|
format++;
|
|
}
|
|
}
|
|
|
|
static void native_to_little_endian (void *data, char *format)
|
|
{
|
|
unsigned char *cp = (unsigned char *) data;
|
|
int32_t temp;
|
|
|
|
while (*format) {
|
|
switch (*format) {
|
|
case 'L':
|
|
temp = * (int32_t *) cp;
|
|
*cp++ = (unsigned char) temp;
|
|
*cp++ = (unsigned char) (temp >> 8);
|
|
*cp++ = (unsigned char) (temp >> 16);
|
|
*cp++ = (unsigned char) (temp >> 24);
|
|
break;
|
|
|
|
case 'S':
|
|
temp = * (short *) cp;
|
|
*cp++ = (unsigned char) temp;
|
|
*cp++ = (unsigned char) (temp >> 8);
|
|
break;
|
|
|
|
default:
|
|
if (isdigit ((unsigned char) *format))
|
|
cp += *format - '0';
|
|
|
|
break;
|
|
}
|
|
|
|
format++;
|
|
}
|
|
}
|
|
#endif
|
|
|