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-rw-r--r--utils/makemhr/loaddef.cpp2033
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diff --git a/utils/makemhr/loaddef.cpp b/utils/makemhr/loaddef.cpp
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+/*
+ * HRTF utility for producing and demonstrating the process of creating an
+ * OpenAL Soft compatible HRIR data set.
+ *
+ * Copyright (C) 2011-2019 Christopher Fitzgerald
+ *
+ * This program 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 2 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, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Or visit: http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
+ */
+
+#include "loaddef.h"
+
+#include <algorithm>
+#include <cctype>
+#include <cmath>
+#include <cstring>
+#include <cstdarg>
+#include <cstdio>
+#include <cstdlib>
+#include <iterator>
+#include <limits>
+#include <memory>
+#include <vector>
+
+#include "alfstream.h"
+#include "alstring.h"
+#include "makemhr.h"
+
+#include "mysofa.h"
+
+// Constants for accessing the token reader's ring buffer.
+#define TR_RING_BITS (16)
+#define TR_RING_SIZE (1 << TR_RING_BITS)
+#define TR_RING_MASK (TR_RING_SIZE - 1)
+
+// The token reader's load interval in bytes.
+#define TR_LOAD_SIZE (TR_RING_SIZE >> 2)
+
+// Token reader state for parsing the data set definition.
+struct TokenReaderT {
+ std::istream &mIStream;
+ const char *mName{};
+ uint mLine{};
+ uint mColumn{};
+ char mRing[TR_RING_SIZE]{};
+ std::streamsize mIn{};
+ std::streamsize mOut{};
+
+ TokenReaderT(std::istream &istream) noexcept : mIStream{istream} { }
+ TokenReaderT(const TokenReaderT&) = default;
+};
+
+
+// The maximum identifier length used when processing the data set
+// definition.
+#define MAX_IDENT_LEN (16)
+
+// The limits for the listener's head 'radius' in the data set definition.
+#define MIN_RADIUS (0.05)
+#define MAX_RADIUS (0.15)
+
+// The maximum number of channels that can be addressed for a WAVE file
+// source listed in the data set definition.
+#define MAX_WAVE_CHANNELS (65535)
+
+// The limits to the byte size for a binary source listed in the definition
+// file.
+#define MIN_BIN_SIZE (2)
+#define MAX_BIN_SIZE (4)
+
+// The minimum number of significant bits for binary sources listed in the
+// data set definition. The maximum is calculated from the byte size.
+#define MIN_BIN_BITS (16)
+
+// The limits to the number of significant bits for an ASCII source listed in
+// the data set definition.
+#define MIN_ASCII_BITS (16)
+#define MAX_ASCII_BITS (32)
+
+// The four-character-codes for RIFF/RIFX WAVE file chunks.
+#define FOURCC_RIFF (0x46464952) // 'RIFF'
+#define FOURCC_RIFX (0x58464952) // 'RIFX'
+#define FOURCC_WAVE (0x45564157) // 'WAVE'
+#define FOURCC_FMT (0x20746D66) // 'fmt '
+#define FOURCC_DATA (0x61746164) // 'data'
+#define FOURCC_LIST (0x5453494C) // 'LIST'
+#define FOURCC_WAVL (0x6C766177) // 'wavl'
+#define FOURCC_SLNT (0x746E6C73) // 'slnt'
+
+// The supported wave formats.
+#define WAVE_FORMAT_PCM (0x0001)
+#define WAVE_FORMAT_IEEE_FLOAT (0x0003)
+#define WAVE_FORMAT_EXTENSIBLE (0xFFFE)
+
+
+enum ByteOrderT {
+ BO_NONE,
+ BO_LITTLE,
+ BO_BIG
+};
+
+// Source format for the references listed in the data set definition.
+enum SourceFormatT {
+ SF_NONE,
+ SF_ASCII, // ASCII text file.
+ SF_BIN_LE, // Little-endian binary file.
+ SF_BIN_BE, // Big-endian binary file.
+ SF_WAVE, // RIFF/RIFX WAVE file.
+ SF_SOFA // Spatially Oriented Format for Accoustics (SOFA) file.
+};
+
+// Element types for the references listed in the data set definition.
+enum ElementTypeT {
+ ET_NONE,
+ ET_INT, // Integer elements.
+ ET_FP // Floating-point elements.
+};
+
+// Source reference state used when loading sources.
+struct SourceRefT {
+ SourceFormatT mFormat;
+ ElementTypeT mType;
+ uint mSize;
+ int mBits;
+ uint mChannel;
+ double mAzimuth;
+ double mElevation;
+ double mRadius;
+ uint mSkip;
+ uint mOffset;
+ char mPath[MAX_PATH_LEN+1];
+};
+
+
+/* Whitespace is not significant. It can process tokens as identifiers, numbers
+ * (integer and floating-point), strings, and operators. Strings must be
+ * encapsulated by double-quotes and cannot span multiple lines.
+ */
+
+// Setup the reader on the given file. The filename can be NULL if no error
+// output is desired.
+static void TrSetup(const char *startbytes, std::streamsize startbytecount, const char *filename,
+ TokenReaderT *tr)
+{
+ const char *name = nullptr;
+
+ if(filename)
+ {
+ const char *slash = strrchr(filename, '/');
+ if(slash)
+ {
+ const char *bslash = strrchr(slash+1, '\\');
+ if(bslash) name = bslash+1;
+ else name = slash+1;
+ }
+ else
+ {
+ const char *bslash = strrchr(filename, '\\');
+ if(bslash) name = bslash+1;
+ else name = filename;
+ }
+ }
+
+ tr->mName = name;
+ tr->mLine = 1;
+ tr->mColumn = 1;
+ tr->mIn = 0;
+ tr->mOut = 0;
+
+ if(startbytecount > 0)
+ {
+ std::copy_n(startbytes, startbytecount, std::begin(tr->mRing));
+ tr->mIn += startbytecount;
+ }
+}
+
+// Prime the reader's ring buffer, and return a result indicating that there
+// is text to process.
+static int TrLoad(TokenReaderT *tr)
+{
+ std::istream &istream = tr->mIStream;
+
+ std::streamsize toLoad{TR_RING_SIZE - static_cast<std::streamsize>(tr->mIn - tr->mOut)};
+ if(toLoad >= TR_LOAD_SIZE && istream.good())
+ {
+ // Load TR_LOAD_SIZE (or less if at the end of the file) per read.
+ toLoad = TR_LOAD_SIZE;
+ std::streamsize in{tr->mIn&TR_RING_MASK};
+ std::streamsize count{TR_RING_SIZE - in};
+ if(count < toLoad)
+ {
+ istream.read(&tr->mRing[in], count);
+ tr->mIn += istream.gcount();
+ istream.read(&tr->mRing[0], toLoad-count);
+ tr->mIn += istream.gcount();
+ }
+ else
+ {
+ istream.read(&tr->mRing[in], toLoad);
+ tr->mIn += istream.gcount();
+ }
+
+ if(tr->mOut >= TR_RING_SIZE)
+ {
+ tr->mOut -= TR_RING_SIZE;
+ tr->mIn -= TR_RING_SIZE;
+ }
+ }
+ if(tr->mIn > tr->mOut)
+ return 1;
+ return 0;
+}
+
+// Error display routine. Only displays when the base name is not NULL.
+static void TrErrorVA(const TokenReaderT *tr, uint line, uint column, const char *format, va_list argPtr)
+{
+ if(!tr->mName)
+ return;
+ fprintf(stderr, "\nError (%s:%u:%u): ", tr->mName, line, column);
+ vfprintf(stderr, format, argPtr);
+}
+
+// Used to display an error at a saved line/column.
+static void TrErrorAt(const TokenReaderT *tr, uint line, uint column, const char *format, ...)
+{
+ va_list argPtr;
+
+ va_start(argPtr, format);
+ TrErrorVA(tr, line, column, format, argPtr);
+ va_end(argPtr);
+}
+
+// Used to display an error at the current line/column.
+static void TrError(const TokenReaderT *tr, const char *format, ...)
+{
+ va_list argPtr;
+
+ va_start(argPtr, format);
+ TrErrorVA(tr, tr->mLine, tr->mColumn, format, argPtr);
+ va_end(argPtr);
+}
+
+// Skips to the next line.
+static void TrSkipLine(TokenReaderT *tr)
+{
+ char ch;
+
+ while(TrLoad(tr))
+ {
+ ch = tr->mRing[tr->mOut&TR_RING_MASK];
+ tr->mOut++;
+ if(ch == '\n')
+ {
+ tr->mLine++;
+ tr->mColumn = 1;
+ break;
+ }
+ tr->mColumn ++;
+ }
+}
+
+// Skips to the next token.
+static int TrSkipWhitespace(TokenReaderT *tr)
+{
+ while(TrLoad(tr))
+ {
+ char ch{tr->mRing[tr->mOut&TR_RING_MASK]};
+ if(isspace(ch))
+ {
+ tr->mOut++;
+ if(ch == '\n')
+ {
+ tr->mLine++;
+ tr->mColumn = 1;
+ }
+ else
+ tr->mColumn++;
+ }
+ else if(ch == '#')
+ TrSkipLine(tr);
+ else
+ return 1;
+ }
+ return 0;
+}
+
+// Get the line and/or column of the next token (or the end of input).
+static void TrIndication(TokenReaderT *tr, uint *line, uint *column)
+{
+ TrSkipWhitespace(tr);
+ if(line) *line = tr->mLine;
+ if(column) *column = tr->mColumn;
+}
+
+// Checks to see if a token is (likely to be) an identifier. It does not
+// display any errors and will not proceed to the next token.
+static int TrIsIdent(TokenReaderT *tr)
+{
+ if(!TrSkipWhitespace(tr))
+ return 0;
+ char ch{tr->mRing[tr->mOut&TR_RING_MASK]};
+ return ch == '_' || isalpha(ch);
+}
+
+
+// Checks to see if a token is the given operator. It does not display any
+// errors and will not proceed to the next token.
+static int TrIsOperator(TokenReaderT *tr, const char *op)
+{
+ std::streamsize out;
+ size_t len;
+ char ch;
+
+ if(!TrSkipWhitespace(tr))
+ return 0;
+ out = tr->mOut;
+ len = 0;
+ while(op[len] != '\0' && out < tr->mIn)
+ {
+ ch = tr->mRing[out&TR_RING_MASK];
+ if(ch != op[len]) break;
+ len++;
+ out++;
+ }
+ if(op[len] == '\0')
+ return 1;
+ return 0;
+}
+
+/* The TrRead*() routines obtain the value of a matching token type. They
+ * display type, form, and boundary errors and will proceed to the next
+ * token.
+ */
+
+// Reads and validates an identifier token.
+static int TrReadIdent(TokenReaderT *tr, const uint maxLen, char *ident)
+{
+ uint col, len;
+ char ch;
+
+ col = tr->mColumn;
+ if(TrSkipWhitespace(tr))
+ {
+ col = tr->mColumn;
+ ch = tr->mRing[tr->mOut&TR_RING_MASK];
+ if(ch == '_' || isalpha(ch))
+ {
+ len = 0;
+ do {
+ if(len < maxLen)
+ ident[len] = ch;
+ len++;
+ tr->mOut++;
+ if(!TrLoad(tr))
+ break;
+ ch = tr->mRing[tr->mOut&TR_RING_MASK];
+ } while(ch == '_' || isdigit(ch) || isalpha(ch));
+
+ tr->mColumn += len;
+ if(len < maxLen)
+ {
+ ident[len] = '\0';
+ return 1;
+ }
+ TrErrorAt(tr, tr->mLine, col, "Identifier is too long.\n");
+ return 0;
+ }
+ }
+ TrErrorAt(tr, tr->mLine, col, "Expected an identifier.\n");
+ return 0;
+}
+
+// Reads and validates (including bounds) an integer token.
+static int TrReadInt(TokenReaderT *tr, const int loBound, const int hiBound, int *value)
+{
+ uint col, digis, len;
+ char ch, temp[64+1];
+
+ col = tr->mColumn;
+ if(TrSkipWhitespace(tr))
+ {
+ col = tr->mColumn;
+ len = 0;
+ ch = tr->mRing[tr->mOut&TR_RING_MASK];
+ if(ch == '+' || ch == '-')
+ {
+ temp[len] = ch;
+ len++;
+ tr->mOut++;
+ }
+ digis = 0;
+ while(TrLoad(tr))
+ {
+ ch = tr->mRing[tr->mOut&TR_RING_MASK];
+ if(!isdigit(ch)) break;
+ if(len < 64)
+ temp[len] = ch;
+ len++;
+ digis++;
+ tr->mOut++;
+ }
+ tr->mColumn += len;
+ if(digis > 0 && ch != '.' && !isalpha(ch))
+ {
+ if(len > 64)
+ {
+ TrErrorAt(tr, tr->mLine, col, "Integer is too long.");
+ return 0;
+ }
+ temp[len] = '\0';
+ *value = static_cast<int>(strtol(temp, nullptr, 10));
+ if(*value < loBound || *value > hiBound)
+ {
+ TrErrorAt(tr, tr->mLine, col, "Expected a value from %d to %d.\n", loBound, hiBound);
+ return 0;
+ }
+ return 1;
+ }
+ }
+ TrErrorAt(tr, tr->mLine, col, "Expected an integer.\n");
+ return 0;
+}
+
+// Reads and validates (including bounds) a float token.
+static int TrReadFloat(TokenReaderT *tr, const double loBound, const double hiBound, double *value)
+{
+ uint col, digis, len;
+ char ch, temp[64+1];
+
+ col = tr->mColumn;
+ if(TrSkipWhitespace(tr))
+ {
+ col = tr->mColumn;
+ len = 0;
+ ch = tr->mRing[tr->mOut&TR_RING_MASK];
+ if(ch == '+' || ch == '-')
+ {
+ temp[len] = ch;
+ len++;
+ tr->mOut++;
+ }
+
+ digis = 0;
+ while(TrLoad(tr))
+ {
+ ch = tr->mRing[tr->mOut&TR_RING_MASK];
+ if(!isdigit(ch)) break;
+ if(len < 64)
+ temp[len] = ch;
+ len++;
+ digis++;
+ tr->mOut++;
+ }
+ if(ch == '.')
+ {
+ if(len < 64)
+ temp[len] = ch;
+ len++;
+ tr->mOut++;
+ }
+ while(TrLoad(tr))
+ {
+ ch = tr->mRing[tr->mOut&TR_RING_MASK];
+ if(!isdigit(ch)) break;
+ if(len < 64)
+ temp[len] = ch;
+ len++;
+ digis++;
+ tr->mOut++;
+ }
+ if(digis > 0)
+ {
+ if(ch == 'E' || ch == 'e')
+ {
+ if(len < 64)
+ temp[len] = ch;
+ len++;
+ digis = 0;
+ tr->mOut++;
+ if(ch == '+' || ch == '-')
+ {
+ if(len < 64)
+ temp[len] = ch;
+ len++;
+ tr->mOut++;
+ }
+ while(TrLoad(tr))
+ {
+ ch = tr->mRing[tr->mOut&TR_RING_MASK];
+ if(!isdigit(ch)) break;
+ if(len < 64)
+ temp[len] = ch;
+ len++;
+ digis++;
+ tr->mOut++;
+ }
+ }
+ tr->mColumn += len;
+ if(digis > 0 && ch != '.' && !isalpha(ch))
+ {
+ if(len > 64)
+ {
+ TrErrorAt(tr, tr->mLine, col, "Float is too long.");
+ return 0;
+ }
+ temp[len] = '\0';
+ *value = strtod(temp, nullptr);
+ if(*value < loBound || *value > hiBound)
+ {
+ TrErrorAt(tr, tr->mLine, col, "Expected a value from %f to %f.\n", loBound, hiBound);
+ return 0;
+ }
+ return 1;
+ }
+ }
+ else
+ tr->mColumn += len;
+ }
+ TrErrorAt(tr, tr->mLine, col, "Expected a float.\n");
+ return 0;
+}
+
+// Reads and validates a string token.
+static int TrReadString(TokenReaderT *tr, const uint maxLen, char *text)
+{
+ uint col, len;
+ char ch;
+
+ col = tr->mColumn;
+ if(TrSkipWhitespace(tr))
+ {
+ col = tr->mColumn;
+ ch = tr->mRing[tr->mOut&TR_RING_MASK];
+ if(ch == '\"')
+ {
+ tr->mOut++;
+ len = 0;
+ while(TrLoad(tr))
+ {
+ ch = tr->mRing[tr->mOut&TR_RING_MASK];
+ tr->mOut++;
+ if(ch == '\"')
+ break;
+ if(ch == '\n')
+ {
+ TrErrorAt(tr, tr->mLine, col, "Unterminated string at end of line.\n");
+ return 0;
+ }
+ if(len < maxLen)
+ text[len] = ch;
+ len++;
+ }
+ if(ch != '\"')
+ {
+ tr->mColumn += 1 + len;
+ TrErrorAt(tr, tr->mLine, col, "Unterminated string at end of input.\n");
+ return 0;
+ }
+ tr->mColumn += 2 + len;
+ if(len > maxLen)
+ {
+ TrErrorAt(tr, tr->mLine, col, "String is too long.\n");
+ return 0;
+ }
+ text[len] = '\0';
+ return 1;
+ }
+ }
+ TrErrorAt(tr, tr->mLine, col, "Expected a string.\n");
+ return 0;
+}
+
+// Reads and validates the given operator.
+static int TrReadOperator(TokenReaderT *tr, const char *op)
+{
+ uint col, len;
+ char ch;
+
+ col = tr->mColumn;
+ if(TrSkipWhitespace(tr))
+ {
+ col = tr->mColumn;
+ len = 0;
+ while(op[len] != '\0' && TrLoad(tr))
+ {
+ ch = tr->mRing[tr->mOut&TR_RING_MASK];
+ if(ch != op[len]) break;
+ len++;
+ tr->mOut++;
+ }
+ tr->mColumn += len;
+ if(op[len] == '\0')
+ return 1;
+ }
+ TrErrorAt(tr, tr->mLine, col, "Expected '%s' operator.\n", op);
+ return 0;
+}
+
+
+/*************************
+ *** File source input ***
+ *************************/
+
+// Read a binary value of the specified byte order and byte size from a file,
+// storing it as a 32-bit unsigned integer.
+static int ReadBin4(std::istream &istream, const char *filename, const ByteOrderT order, const uint bytes, uint32_t *out)
+{
+ uint8_t in[4];
+ istream.read(reinterpret_cast<char*>(in), static_cast<int>(bytes));
+ if(istream.gcount() != bytes)
+ {
+ fprintf(stderr, "\nError: Bad read from file '%s'.\n", filename);
+ return 0;
+ }
+ uint32_t accum{0};
+ switch(order)
+ {
+ case BO_LITTLE:
+ for(uint i = 0;i < bytes;i++)
+ accum = (accum<<8) | in[bytes - i - 1];
+ break;
+ case BO_BIG:
+ for(uint i = 0;i < bytes;i++)
+ accum = (accum<<8) | in[i];
+ break;
+ default:
+ break;
+ }
+ *out = accum;
+ return 1;
+}
+
+// Read a binary value of the specified byte order from a file, storing it as
+// a 64-bit unsigned integer.
+static int ReadBin8(std::istream &istream, const char *filename, const ByteOrderT order, uint64_t *out)
+{
+ uint8_t in[8];
+ uint64_t accum;
+ uint i;
+
+ istream.read(reinterpret_cast<char*>(in), 8);
+ if(istream.gcount() != 8)
+ {
+ fprintf(stderr, "\nError: Bad read from file '%s'.\n", filename);
+ return 0;
+ }
+ accum = 0;
+ switch(order)
+ {
+ case BO_LITTLE:
+ for(i = 0;i < 8;i++)
+ accum = (accum<<8) | in[8 - i - 1];
+ break;
+ case BO_BIG:
+ for(i = 0;i < 8;i++)
+ accum = (accum<<8) | in[i];
+ break;
+ default:
+ break;
+ }
+ *out = accum;
+ return 1;
+}
+
+/* Read a binary value of the specified type, byte order, and byte size from
+ * a file, converting it to a double. For integer types, the significant
+ * bits are used to normalize the result. The sign of bits determines
+ * whether they are padded toward the MSB (negative) or LSB (positive).
+ * Floating-point types are not normalized.
+ */
+static int ReadBinAsDouble(std::istream &istream, const char *filename, const ByteOrderT order,
+ const ElementTypeT type, const uint bytes, const int bits, double *out)
+{
+ union {
+ uint32_t ui;
+ int32_t i;
+ float f;
+ } v4;
+ union {
+ uint64_t ui;
+ double f;
+ } v8;
+
+ *out = 0.0;
+ if(bytes > 4)
+ {
+ if(!ReadBin8(istream, filename, order, &v8.ui))
+ return 0;
+ if(type == ET_FP)
+ *out = v8.f;
+ }
+ else
+ {
+ if(!ReadBin4(istream, filename, order, bytes, &v4.ui))
+ return 0;
+ if(type == ET_FP)
+ *out = v4.f;
+ else
+ {
+ if(bits > 0)
+ v4.ui >>= (8*bytes) - (static_cast<uint>(bits));
+ else
+ v4.ui &= (0xFFFFFFFF >> (32+bits));
+
+ if(v4.ui&static_cast<uint>(1<<(std::abs(bits)-1)))
+ v4.ui |= (0xFFFFFFFF << std::abs(bits));
+ *out = v4.i / static_cast<double>(1<<(std::abs(bits)-1));
+ }
+ }
+ return 1;
+}
+
+/* Read an ascii value of the specified type from a file, converting it to a
+ * double. For integer types, the significant bits are used to normalize the
+ * result. The sign of the bits should always be positive. This also skips
+ * up to one separator character before the element itself.
+ */
+static int ReadAsciiAsDouble(TokenReaderT *tr, const char *filename, const ElementTypeT type, const uint bits, double *out)
+{
+ if(TrIsOperator(tr, ","))
+ TrReadOperator(tr, ",");
+ else if(TrIsOperator(tr, ":"))
+ TrReadOperator(tr, ":");
+ else if(TrIsOperator(tr, ";"))
+ TrReadOperator(tr, ";");
+ else if(TrIsOperator(tr, "|"))
+ TrReadOperator(tr, "|");
+
+ if(type == ET_FP)
+ {
+ if(!TrReadFloat(tr, -std::numeric_limits<double>::infinity(),
+ std::numeric_limits<double>::infinity(), out))
+ {
+ fprintf(stderr, "\nError: Bad read from file '%s'.\n", filename);
+ return 0;
+ }
+ }
+ else
+ {
+ int v;
+ if(!TrReadInt(tr, -(1<<(bits-1)), (1<<(bits-1))-1, &v))
+ {
+ fprintf(stderr, "\nError: Bad read from file '%s'.\n", filename);
+ return 0;
+ }
+ *out = v / static_cast<double>((1<<(bits-1))-1);
+ }
+ return 1;
+}
+
+// Read the RIFF/RIFX WAVE format chunk from a file, validating it against
+// the source parameters and data set metrics.
+static int ReadWaveFormat(std::istream &istream, const ByteOrderT order, const uint hrirRate,
+ SourceRefT *src)
+{
+ uint32_t fourCC, chunkSize;
+ uint32_t format, channels, rate, dummy, block, size, bits;
+
+ chunkSize = 0;
+ do {
+ if(chunkSize > 0)
+ istream.seekg(static_cast<int>(chunkSize), std::ios::cur);
+ if(!ReadBin4(istream, src->mPath, BO_LITTLE, 4, &fourCC)
+ || !ReadBin4(istream, src->mPath, order, 4, &chunkSize))
+ return 0;
+ } while(fourCC != FOURCC_FMT);
+ if(!ReadBin4(istream, src->mPath, order, 2, &format)
+ || !ReadBin4(istream, src->mPath, order, 2, &channels)
+ || !ReadBin4(istream, src->mPath, order, 4, &rate)
+ || !ReadBin4(istream, src->mPath, order, 4, &dummy)
+ || !ReadBin4(istream, src->mPath, order, 2, &block))
+ return 0;
+ block /= channels;
+ if(chunkSize > 14)
+ {
+ if(!ReadBin4(istream, src->mPath, order, 2, &size))
+ return 0;
+ size /= 8;
+ if(block > size)
+ size = block;
+ }
+ else
+ size = block;
+ if(format == WAVE_FORMAT_EXTENSIBLE)
+ {
+ istream.seekg(2, std::ios::cur);
+ if(!ReadBin4(istream, src->mPath, order, 2, &bits))
+ return 0;
+ if(bits == 0)
+ bits = 8 * size;
+ istream.seekg(4, std::ios::cur);
+ if(!ReadBin4(istream, src->mPath, order, 2, &format))
+ return 0;
+ istream.seekg(static_cast<int>(chunkSize - 26), std::ios::cur);
+ }
+ else
+ {
+ bits = 8 * size;
+ if(chunkSize > 14)
+ istream.seekg(static_cast<int>(chunkSize - 16), std::ios::cur);
+ else
+ istream.seekg(static_cast<int>(chunkSize - 14), std::ios::cur);
+ }
+ if(format != WAVE_FORMAT_PCM && format != WAVE_FORMAT_IEEE_FLOAT)
+ {
+ fprintf(stderr, "\nError: Unsupported WAVE format in file '%s'.\n", src->mPath);
+ return 0;
+ }
+ if(src->mChannel >= channels)
+ {
+ fprintf(stderr, "\nError: Missing source channel in WAVE file '%s'.\n", src->mPath);
+ return 0;
+ }
+ if(rate != hrirRate)
+ {
+ fprintf(stderr, "\nError: Mismatched source sample rate in WAVE file '%s'.\n", src->mPath);
+ return 0;
+ }
+ if(format == WAVE_FORMAT_PCM)
+ {
+ if(size < 2 || size > 4)
+ {
+ fprintf(stderr, "\nError: Unsupported sample size in WAVE file '%s'.\n", src->mPath);
+ return 0;
+ }
+ if(bits < 16 || bits > (8*size))
+ {
+ fprintf(stderr, "\nError: Bad significant bits in WAVE file '%s'.\n", src->mPath);
+ return 0;
+ }
+ src->mType = ET_INT;
+ }
+ else
+ {
+ if(size != 4 && size != 8)
+ {
+ fprintf(stderr, "\nError: Unsupported sample size in WAVE file '%s'.\n", src->mPath);
+ return 0;
+ }
+ src->mType = ET_FP;
+ }
+ src->mSize = size;
+ src->mBits = static_cast<int>(bits);
+ src->mSkip = channels;
+ return 1;
+}
+
+// Read a RIFF/RIFX WAVE data chunk, converting all elements to doubles.
+static int ReadWaveData(std::istream &istream, const SourceRefT *src, const ByteOrderT order,
+ const uint n, double *hrir)
+{
+ int pre, post, skip;
+ uint i;
+
+ pre = static_cast<int>(src->mSize * src->mChannel);
+ post = static_cast<int>(src->mSize * (src->mSkip - src->mChannel - 1));
+ skip = 0;
+ for(i = 0;i < n;i++)
+ {
+ skip += pre;
+ if(skip > 0)
+ istream.seekg(skip, std::ios::cur);
+ if(!ReadBinAsDouble(istream, src->mPath, order, src->mType, src->mSize, src->mBits, &hrir[i]))
+ return 0;
+ skip = post;
+ }
+ if(skip > 0)
+ istream.seekg(skip, std::ios::cur);
+ return 1;
+}
+
+// Read the RIFF/RIFX WAVE list or data chunk, converting all elements to
+// doubles.
+static int ReadWaveList(std::istream &istream, const SourceRefT *src, const ByteOrderT order,
+ const uint n, double *hrir)
+{
+ uint32_t fourCC, chunkSize, listSize, count;
+ uint block, skip, offset, i;
+ double lastSample;
+
+ for(;;)
+ {
+ if(!ReadBin4(istream, src->mPath, BO_LITTLE, 4, &fourCC)
+ || !ReadBin4(istream, src->mPath, order, 4, &chunkSize))
+ return 0;
+
+ if(fourCC == FOURCC_DATA)
+ {
+ block = src->mSize * src->mSkip;
+ count = chunkSize / block;
+ if(count < (src->mOffset + n))
+ {
+ fprintf(stderr, "\nError: Bad read from file '%s'.\n", src->mPath);
+ return 0;
+ }
+ istream.seekg(static_cast<long>(src->mOffset * block), std::ios::cur);
+ if(!ReadWaveData(istream, src, order, n, &hrir[0]))
+ return 0;
+ return 1;
+ }
+ else if(fourCC == FOURCC_LIST)
+ {
+ if(!ReadBin4(istream, src->mPath, BO_LITTLE, 4, &fourCC))
+ return 0;
+ chunkSize -= 4;
+ if(fourCC == FOURCC_WAVL)
+ break;
+ }
+ if(chunkSize > 0)
+ istream.seekg(static_cast<long>(chunkSize), std::ios::cur);
+ }
+ listSize = chunkSize;
+ block = src->mSize * src->mSkip;
+ skip = src->mOffset;
+ offset = 0;
+ lastSample = 0.0;
+ while(offset < n && listSize > 8)
+ {
+ if(!ReadBin4(istream, src->mPath, BO_LITTLE, 4, &fourCC)
+ || !ReadBin4(istream, src->mPath, order, 4, &chunkSize))
+ return 0;
+ listSize -= 8 + chunkSize;
+ if(fourCC == FOURCC_DATA)
+ {
+ count = chunkSize / block;
+ if(count > skip)
+ {
+ istream.seekg(static_cast<long>(skip * block), std::ios::cur);
+ chunkSize -= skip * block;
+ count -= skip;
+ skip = 0;
+ if(count > (n - offset))
+ count = n - offset;
+ if(!ReadWaveData(istream, src, order, count, &hrir[offset]))
+ return 0;
+ chunkSize -= count * block;
+ offset += count;
+ lastSample = hrir[offset - 1];
+ }
+ else
+ {
+ skip -= count;
+ count = 0;
+ }
+ }
+ else if(fourCC == FOURCC_SLNT)
+ {
+ if(!ReadBin4(istream, src->mPath, order, 4, &count))
+ return 0;
+ chunkSize -= 4;
+ if(count > skip)
+ {
+ count -= skip;
+ skip = 0;
+ if(count > (n - offset))
+ count = n - offset;
+ for(i = 0; i < count; i ++)
+ hrir[offset + i] = lastSample;
+ offset += count;
+ }
+ else
+ {
+ skip -= count;
+ count = 0;
+ }
+ }
+ if(chunkSize > 0)
+ istream.seekg(static_cast<long>(chunkSize), std::ios::cur);
+ }
+ if(offset < n)
+ {
+ fprintf(stderr, "\nError: Bad read from file '%s'.\n", src->mPath);
+ return 0;
+ }
+ return 1;
+}
+
+// Load a source HRIR from an ASCII text file containing a list of elements
+// separated by whitespace or common list operators (',', ';', ':', '|').
+static int LoadAsciiSource(std::istream &istream, const SourceRefT *src,
+ const uint n, double *hrir)
+{
+ TokenReaderT tr{istream};
+ uint i, j;
+ double dummy;
+
+ TrSetup(nullptr, 0, nullptr, &tr);
+ for(i = 0;i < src->mOffset;i++)
+ {
+ if(!ReadAsciiAsDouble(&tr, src->mPath, src->mType, static_cast<uint>(src->mBits), &dummy))
+ return 0;
+ }
+ for(i = 0;i < n;i++)
+ {
+ if(!ReadAsciiAsDouble(&tr, src->mPath, src->mType, static_cast<uint>(src->mBits), &hrir[i]))
+ return 0;
+ for(j = 0;j < src->mSkip;j++)
+ {
+ if(!ReadAsciiAsDouble(&tr, src->mPath, src->mType, static_cast<uint>(src->mBits), &dummy))
+ return 0;
+ }
+ }
+ return 1;
+}
+
+// Load a source HRIR from a binary file.
+static int LoadBinarySource(std::istream &istream, const SourceRefT *src, const ByteOrderT order,
+ const uint n, double *hrir)
+{
+ istream.seekg(static_cast<long>(src->mOffset), std::ios::beg);
+ for(uint i{0};i < n;i++)
+ {
+ if(!ReadBinAsDouble(istream, src->mPath, order, src->mType, src->mSize, src->mBits, &hrir[i]))
+ return 0;
+ if(src->mSkip > 0)
+ istream.seekg(static_cast<long>(src->mSkip), std::ios::cur);
+ }
+ return 1;
+}
+
+// Load a source HRIR from a RIFF/RIFX WAVE file.
+static int LoadWaveSource(std::istream &istream, SourceRefT *src, const uint hrirRate,
+ const uint n, double *hrir)
+{
+ uint32_t fourCC, dummy;
+ ByteOrderT order;
+
+ if(!ReadBin4(istream, src->mPath, BO_LITTLE, 4, &fourCC)
+ || !ReadBin4(istream, src->mPath, BO_LITTLE, 4, &dummy))
+ return 0;
+ if(fourCC == FOURCC_RIFF)
+ order = BO_LITTLE;
+ else if(fourCC == FOURCC_RIFX)
+ order = BO_BIG;
+ else
+ {
+ fprintf(stderr, "\nError: No RIFF/RIFX chunk in file '%s'.\n", src->mPath);
+ return 0;
+ }
+
+ if(!ReadBin4(istream, src->mPath, BO_LITTLE, 4, &fourCC))
+ return 0;
+ if(fourCC != FOURCC_WAVE)
+ {
+ fprintf(stderr, "\nError: Not a RIFF/RIFX WAVE file '%s'.\n", src->mPath);
+ return 0;
+ }
+ if(!ReadWaveFormat(istream, order, hrirRate, src))
+ return 0;
+ if(!ReadWaveList(istream, src, order, n, hrir))
+ return 0;
+ return 1;
+}
+
+
+
+// Load a Spatially Oriented Format for Accoustics (SOFA) file.
+static MYSOFA_EASY* LoadSofaFile(SourceRefT *src, const uint hrirRate, const uint n)
+{
+ struct MYSOFA_EASY *sofa{mysofa_cache_lookup(src->mPath, static_cast<float>(hrirRate))};
+ if(sofa) return sofa;
+
+ sofa = static_cast<MYSOFA_EASY*>(calloc(1, sizeof(*sofa)));
+ if(sofa == nullptr)
+ {
+ fprintf(stderr, "\nError: Out of memory.\n");
+ return nullptr;
+ }
+ sofa->lookup = nullptr;
+ sofa->neighborhood = nullptr;
+
+ int err;
+ sofa->hrtf = mysofa_load(src->mPath, &err);
+ if(!sofa->hrtf)
+ {
+ mysofa_close(sofa);
+ fprintf(stderr, "\nError: Could not load source file '%s'.\n", src->mPath);
+ return nullptr;
+ }
+ /* NOTE: Some valid SOFA files are failing this check. */
+ err = mysofa_check(sofa->hrtf);
+ if(err != MYSOFA_OK)
+ fprintf(stderr, "\nWarning: Supposedly malformed source file '%s'.\n", src->mPath);
+ if((src->mOffset + n) > sofa->hrtf->N)
+ {
+ mysofa_close(sofa);
+ fprintf(stderr, "\nError: Not enough samples in SOFA file '%s'.\n", src->mPath);
+ return nullptr;
+ }
+ if(src->mChannel >= sofa->hrtf->R)
+ {
+ mysofa_close(sofa);
+ fprintf(stderr, "\nError: Missing source receiver in SOFA file '%s'.\n", src->mPath);
+ return nullptr;
+ }
+ mysofa_tocartesian(sofa->hrtf);
+ sofa->lookup = mysofa_lookup_init(sofa->hrtf);
+ if(sofa->lookup == nullptr)
+ {
+ mysofa_close(sofa);
+ fprintf(stderr, "\nError: Out of memory.\n");
+ return nullptr;
+ }
+ return mysofa_cache_store(sofa, src->mPath, static_cast<float>(hrirRate));
+}
+
+// Copies the HRIR data from a particular SOFA measurement.
+static void ExtractSofaHrir(const MYSOFA_EASY *sofa, const uint index, const uint channel, const uint offset, const uint n, double *hrir)
+{
+ for(uint i{0u};i < n;i++)
+ hrir[i] = sofa->hrtf->DataIR.values[(index*sofa->hrtf->R + channel)*sofa->hrtf->N + offset + i];
+}
+
+// Load a source HRIR from a Spatially Oriented Format for Accoustics (SOFA)
+// file.
+static int LoadSofaSource(SourceRefT *src, const uint hrirRate, const uint n, double *hrir)
+{
+ struct MYSOFA_EASY *sofa;
+ float target[3];
+ int nearest;
+ float *coords;
+
+ sofa = LoadSofaFile(src, hrirRate, n);
+ if(sofa == nullptr)
+ return 0;
+
+ /* NOTE: At some point it may be benficial or necessary to consider the
+ various coordinate systems, listener/source orientations, and
+ direciontal vectors defined in the SOFA file.
+ */
+ target[0] = static_cast<float>(src->mAzimuth);
+ target[1] = static_cast<float>(src->mElevation);
+ target[2] = static_cast<float>(src->mRadius);
+ mysofa_s2c(target);
+
+ nearest = mysofa_lookup(sofa->lookup, target);
+ if(nearest < 0)
+ {
+ fprintf(stderr, "\nError: Lookup failed in source file '%s'.\n", src->mPath);
+ return 0;
+ }
+
+ coords = &sofa->hrtf->SourcePosition.values[3 * nearest];
+ if(std::abs(coords[0] - target[0]) > 0.001 || std::abs(coords[1] - target[1]) > 0.001 || std::abs(coords[2] - target[2]) > 0.001)
+ {
+ fprintf(stderr, "\nError: No impulse response at coordinates (%.3fr, %.1fev, %.1faz) in file '%s'.\n", src->mRadius, src->mElevation, src->mAzimuth, src->mPath);
+ target[0] = coords[0];
+ target[1] = coords[1];
+ target[2] = coords[2];
+ mysofa_c2s(target);
+ fprintf(stderr, " Nearest candidate at (%.3fr, %.1fev, %.1faz).\n", target[2], target[1], target[0]);
+ return 0;
+ }
+
+ ExtractSofaHrir(sofa, static_cast<uint>(nearest), src->mChannel, src->mOffset, n, hrir);
+
+ return 1;
+}
+
+// Load a source HRIR from a supported file type.
+static int LoadSource(SourceRefT *src, const uint hrirRate, const uint n, double *hrir)
+{
+ std::unique_ptr<al::ifstream> istream;
+ if(src->mFormat != SF_SOFA)
+ {
+ if(src->mFormat == SF_ASCII)
+ istream.reset(new al::ifstream{src->mPath});
+ else
+ istream.reset(new al::ifstream{src->mPath, std::ios::binary});
+ if(!istream->good())
+ {
+ fprintf(stderr, "\nError: Could not open source file '%s'.\n", src->mPath);
+ return 0;
+ }
+ }
+ int result{0};
+ switch(src->mFormat)
+ {
+ case SF_ASCII:
+ result = LoadAsciiSource(*istream, src, n, hrir);
+ break;
+ case SF_BIN_LE:
+ result = LoadBinarySource(*istream, src, BO_LITTLE, n, hrir);
+ break;
+ case SF_BIN_BE:
+ result = LoadBinarySource(*istream, src, BO_BIG, n, hrir);
+ break;
+ case SF_WAVE:
+ result = LoadWaveSource(*istream, src, hrirRate, n, hrir);
+ break;
+ case SF_SOFA:
+ result = LoadSofaSource(src, hrirRate, n, hrir);
+ break;
+ case SF_NONE:
+ break;
+ }
+ return result;
+}
+
+
+// Match the channel type from a given identifier.
+static ChannelTypeT MatchChannelType(const char *ident)
+{
+ if(al::strcasecmp(ident, "mono") == 0)
+ return CT_MONO;
+ if(al::strcasecmp(ident, "stereo") == 0)
+ return CT_STEREO;
+ return CT_NONE;
+}
+
+
+// Process the data set definition to read and validate the data set metrics.
+static int ProcessMetrics(TokenReaderT *tr, const uint fftSize, const uint truncSize, const ChannelModeT chanMode, HrirDataT *hData)
+{
+ int hasRate = 0, hasType = 0, hasPoints = 0, hasRadius = 0;
+ int hasDistance = 0, hasAzimuths = 0;
+ char ident[MAX_IDENT_LEN+1];
+ uint line, col;
+ double fpVal;
+ uint points;
+ int intVal;
+ double distances[MAX_FD_COUNT];
+ uint fdCount = 0;
+ uint evCounts[MAX_FD_COUNT];
+ std::vector<uint> azCounts(MAX_FD_COUNT * MAX_EV_COUNT);
+
+ TrIndication(tr, &line, &col);
+ while(TrIsIdent(tr))
+ {
+ TrIndication(tr, &line, &col);
+ if(!TrReadIdent(tr, MAX_IDENT_LEN, ident))
+ return 0;
+ if(al::strcasecmp(ident, "rate") == 0)
+ {
+ if(hasRate)
+ {
+ TrErrorAt(tr, line, col, "Redefinition of 'rate'.\n");
+ return 0;
+ }
+ if(!TrReadOperator(tr, "="))
+ return 0;
+ if(!TrReadInt(tr, MIN_RATE, MAX_RATE, &intVal))
+ return 0;
+ hData->mIrRate = static_cast<uint>(intVal);
+ hasRate = 1;
+ }
+ else if(al::strcasecmp(ident, "type") == 0)
+ {
+ char type[MAX_IDENT_LEN+1];
+
+ if(hasType)
+ {
+ TrErrorAt(tr, line, col, "Redefinition of 'type'.\n");
+ return 0;
+ }
+ if(!TrReadOperator(tr, "="))
+ return 0;
+
+ if(!TrReadIdent(tr, MAX_IDENT_LEN, type))
+ return 0;
+ hData->mChannelType = MatchChannelType(type);
+ if(hData->mChannelType == CT_NONE)
+ {
+ TrErrorAt(tr, line, col, "Expected a channel type.\n");
+ return 0;
+ }
+ else if(hData->mChannelType == CT_STEREO)
+ {
+ if(chanMode == CM_ForceMono)
+ hData->mChannelType = CT_MONO;
+ }
+ hasType = 1;
+ }
+ else if(al::strcasecmp(ident, "points") == 0)
+ {
+ if(hasPoints)
+ {
+ TrErrorAt(tr, line, col, "Redefinition of 'points'.\n");
+ return 0;
+ }
+ if(!TrReadOperator(tr, "="))
+ return 0;
+ TrIndication(tr, &line, &col);
+ if(!TrReadInt(tr, MIN_POINTS, MAX_POINTS, &intVal))
+ return 0;
+ points = static_cast<uint>(intVal);
+ if(fftSize > 0 && points > fftSize)
+ {
+ TrErrorAt(tr, line, col, "Value exceeds the overridden FFT size.\n");
+ return 0;
+ }
+ if(points < truncSize)
+ {
+ TrErrorAt(tr, line, col, "Value is below the truncation size.\n");
+ return 0;
+ }
+ hData->mIrPoints = points;
+ hData->mFftSize = fftSize;
+ hData->mIrSize = 1 + (fftSize / 2);
+ if(points > hData->mIrSize)
+ hData->mIrSize = points;
+ hasPoints = 1;
+ }
+ else if(al::strcasecmp(ident, "radius") == 0)
+ {
+ if(hasRadius)
+ {
+ TrErrorAt(tr, line, col, "Redefinition of 'radius'.\n");
+ return 0;
+ }
+ if(!TrReadOperator(tr, "="))
+ return 0;
+ if(!TrReadFloat(tr, MIN_RADIUS, MAX_RADIUS, &fpVal))
+ return 0;
+ hData->mRadius = fpVal;
+ hasRadius = 1;
+ }
+ else if(al::strcasecmp(ident, "distance") == 0)
+ {
+ uint count = 0;
+
+ if(hasDistance)
+ {
+ TrErrorAt(tr, line, col, "Redefinition of 'distance'.\n");
+ return 0;
+ }
+ if(!TrReadOperator(tr, "="))
+ return 0;
+
+ for(;;)
+ {
+ if(!TrReadFloat(tr, MIN_DISTANCE, MAX_DISTANCE, &fpVal))
+ return 0;
+ if(count > 0 && fpVal <= distances[count - 1])
+ {
+ TrError(tr, "Distances are not ascending.\n");
+ return 0;
+ }
+ distances[count++] = fpVal;
+ if(!TrIsOperator(tr, ","))
+ break;
+ if(count >= MAX_FD_COUNT)
+ {
+ TrError(tr, "Exceeded the maximum of %d fields.\n", MAX_FD_COUNT);
+ return 0;
+ }
+ TrReadOperator(tr, ",");
+ }
+ if(fdCount != 0 && count != fdCount)
+ {
+ TrError(tr, "Did not match the specified number of %d fields.\n", fdCount);
+ return 0;
+ }
+ fdCount = count;
+ hasDistance = 1;
+ }
+ else if(al::strcasecmp(ident, "azimuths") == 0)
+ {
+ uint count = 0;
+
+ if(hasAzimuths)
+ {
+ TrErrorAt(tr, line, col, "Redefinition of 'azimuths'.\n");
+ return 0;
+ }
+ if(!TrReadOperator(tr, "="))
+ return 0;
+
+ evCounts[0] = 0;
+ for(;;)
+ {
+ if(!TrReadInt(tr, MIN_AZ_COUNT, MAX_AZ_COUNT, &intVal))
+ return 0;
+ azCounts[(count * MAX_EV_COUNT) + evCounts[count]++] = static_cast<uint>(intVal);
+ if(TrIsOperator(tr, ","))
+ {
+ if(evCounts[count] >= MAX_EV_COUNT)
+ {
+ TrError(tr, "Exceeded the maximum of %d elevations.\n", MAX_EV_COUNT);
+ return 0;
+ }
+ TrReadOperator(tr, ",");
+ }
+ else
+ {
+ if(evCounts[count] < MIN_EV_COUNT)
+ {
+ TrErrorAt(tr, line, col, "Did not reach the minimum of %d azimuth counts.\n", MIN_EV_COUNT);
+ return 0;
+ }
+ if(azCounts[count * MAX_EV_COUNT] != 1 || azCounts[(count * MAX_EV_COUNT) + evCounts[count] - 1] != 1)
+ {
+ TrError(tr, "Poles are not singular for field %d.\n", count - 1);
+ return 0;
+ }
+ count++;
+ if(!TrIsOperator(tr, ";"))
+ break;
+
+ if(count >= MAX_FD_COUNT)
+ {
+ TrError(tr, "Exceeded the maximum number of %d fields.\n", MAX_FD_COUNT);
+ return 0;
+ }
+ evCounts[count] = 0;
+ TrReadOperator(tr, ";");
+ }
+ }
+ if(fdCount != 0 && count != fdCount)
+ {
+ TrError(tr, "Did not match the specified number of %d fields.\n", fdCount);
+ return 0;
+ }
+ fdCount = count;
+ hasAzimuths = 1;
+ }
+ else
+ {
+ TrErrorAt(tr, line, col, "Expected a metric name.\n");
+ return 0;
+ }
+ TrSkipWhitespace(tr);
+ }
+ if(!(hasRate && hasPoints && hasRadius && hasDistance && hasAzimuths))
+ {
+ TrErrorAt(tr, line, col, "Expected a metric name.\n");
+ return 0;
+ }
+ if(distances[0] < hData->mRadius)
+ {
+ TrError(tr, "Distance cannot start below head radius.\n");
+ return 0;
+ }
+ if(hData->mChannelType == CT_NONE)
+ hData->mChannelType = CT_MONO;
+ if(!PrepareHrirData(fdCount, distances, evCounts, azCounts.data(), hData))
+ {
+ fprintf(stderr, "Error: Out of memory.\n");
+ exit(-1);
+ }
+ return 1;
+}
+
+// Parse an index triplet from the data set definition.
+static int ReadIndexTriplet(TokenReaderT *tr, const HrirDataT *hData, uint *fi, uint *ei, uint *ai)
+{
+ int intVal;
+
+ if(hData->mFdCount > 1)
+ {
+ if(!TrReadInt(tr, 0, static_cast<int>(hData->mFdCount) - 1, &intVal))
+ return 0;
+ *fi = static_cast<uint>(intVal);
+ if(!TrReadOperator(tr, ","))
+ return 0;
+ }
+ else
+ {
+ *fi = 0;
+ }
+ if(!TrReadInt(tr, 0, static_cast<int>(hData->mFds[*fi].mEvCount) - 1, &intVal))
+ return 0;
+ *ei = static_cast<uint>(intVal);
+ if(!TrReadOperator(tr, ","))
+ return 0;
+ if(!TrReadInt(tr, 0, static_cast<int>(hData->mFds[*fi].mEvs[*ei].mAzCount) - 1, &intVal))
+ return 0;
+ *ai = static_cast<uint>(intVal);
+ return 1;
+}
+
+// Match the source format from a given identifier.
+static SourceFormatT MatchSourceFormat(const char *ident)
+{
+ if(al::strcasecmp(ident, "ascii") == 0)
+ return SF_ASCII;
+ if(al::strcasecmp(ident, "bin_le") == 0)
+ return SF_BIN_LE;
+ if(al::strcasecmp(ident, "bin_be") == 0)
+ return SF_BIN_BE;
+ if(al::strcasecmp(ident, "wave") == 0)
+ return SF_WAVE;
+ if(al::strcasecmp(ident, "sofa") == 0)
+ return SF_SOFA;
+ return SF_NONE;
+}
+
+// Match the source element type from a given identifier.
+static ElementTypeT MatchElementType(const char *ident)
+{
+ if(al::strcasecmp(ident, "int") == 0)
+ return ET_INT;
+ if(al::strcasecmp(ident, "fp") == 0)
+ return ET_FP;
+ return ET_NONE;
+}
+
+// Parse and validate a source reference from the data set definition.
+static int ReadSourceRef(TokenReaderT *tr, SourceRefT *src)
+{
+ char ident[MAX_IDENT_LEN+1];
+ uint line, col;
+ double fpVal;
+ int intVal;
+
+ TrIndication(tr, &line, &col);
+ if(!TrReadIdent(tr, MAX_IDENT_LEN, ident))
+ return 0;
+ src->mFormat = MatchSourceFormat(ident);
+ if(src->mFormat == SF_NONE)
+ {
+ TrErrorAt(tr, line, col, "Expected a source format.\n");
+ return 0;
+ }
+ if(!TrReadOperator(tr, "("))
+ return 0;
+ if(src->mFormat == SF_SOFA)
+ {
+ if(!TrReadFloat(tr, MIN_DISTANCE, MAX_DISTANCE, &fpVal))
+ return 0;
+ src->mRadius = fpVal;
+ if(!TrReadOperator(tr, ","))
+ return 0;
+ if(!TrReadFloat(tr, -90.0, 90.0, &fpVal))
+ return 0;
+ src->mElevation = fpVal;
+ if(!TrReadOperator(tr, ","))
+ return 0;
+ if(!TrReadFloat(tr, -360.0, 360.0, &fpVal))
+ return 0;
+ src->mAzimuth = fpVal;
+ if(!TrReadOperator(tr, ":"))
+ return 0;
+ if(!TrReadInt(tr, 0, MAX_WAVE_CHANNELS, &intVal))
+ return 0;
+ src->mType = ET_NONE;
+ src->mSize = 0;
+ src->mBits = 0;
+ src->mChannel = static_cast<uint>(intVal);
+ src->mSkip = 0;
+ }
+ else if(src->mFormat == SF_WAVE)
+ {
+ if(!TrReadInt(tr, 0, MAX_WAVE_CHANNELS, &intVal))
+ return 0;
+ src->mType = ET_NONE;
+ src->mSize = 0;
+ src->mBits = 0;
+ src->mChannel = static_cast<uint>(intVal);
+ src->mSkip = 0;
+ }
+ else
+ {
+ TrIndication(tr, &line, &col);
+ if(!TrReadIdent(tr, MAX_IDENT_LEN, ident))
+ return 0;
+ src->mType = MatchElementType(ident);
+ if(src->mType == ET_NONE)
+ {
+ TrErrorAt(tr, line, col, "Expected a source element type.\n");
+ return 0;
+ }
+ if(src->mFormat == SF_BIN_LE || src->mFormat == SF_BIN_BE)
+ {
+ if(!TrReadOperator(tr, ","))
+ return 0;
+ if(src->mType == ET_INT)
+ {
+ if(!TrReadInt(tr, MIN_BIN_SIZE, MAX_BIN_SIZE, &intVal))
+ return 0;
+ src->mSize = static_cast<uint>(intVal);
+ if(!TrIsOperator(tr, ","))
+ src->mBits = static_cast<int>(8*src->mSize);
+ else
+ {
+ TrReadOperator(tr, ",");
+ TrIndication(tr, &line, &col);
+ if(!TrReadInt(tr, -2147483647-1, 2147483647, &intVal))
+ return 0;
+ if(std::abs(intVal) < MIN_BIN_BITS || static_cast<uint>(std::abs(intVal)) > (8*src->mSize))
+ {
+ TrErrorAt(tr, line, col, "Expected a value of (+/-) %d to %d.\n", MIN_BIN_BITS, 8*src->mSize);
+ return 0;
+ }
+ src->mBits = intVal;
+ }
+ }
+ else
+ {
+ TrIndication(tr, &line, &col);
+ if(!TrReadInt(tr, -2147483647-1, 2147483647, &intVal))
+ return 0;
+ if(intVal != 4 && intVal != 8)
+ {
+ TrErrorAt(tr, line, col, "Expected a value of 4 or 8.\n");
+ return 0;
+ }
+ src->mSize = static_cast<uint>(intVal);
+ src->mBits = 0;
+ }
+ }
+ else if(src->mFormat == SF_ASCII && src->mType == ET_INT)
+ {
+ if(!TrReadOperator(tr, ","))
+ return 0;
+ if(!TrReadInt(tr, MIN_ASCII_BITS, MAX_ASCII_BITS, &intVal))
+ return 0;
+ src->mSize = 0;
+ src->mBits = intVal;
+ }
+ else
+ {
+ src->mSize = 0;
+ src->mBits = 0;
+ }
+
+ if(!TrIsOperator(tr, ";"))
+ src->mSkip = 0;
+ else
+ {
+ TrReadOperator(tr, ";");
+ if(!TrReadInt(tr, 0, 0x7FFFFFFF, &intVal))
+ return 0;
+ src->mSkip = static_cast<uint>(intVal);
+ }
+ }
+ if(!TrReadOperator(tr, ")"))
+ return 0;
+ if(TrIsOperator(tr, "@"))
+ {
+ TrReadOperator(tr, "@");
+ if(!TrReadInt(tr, 0, 0x7FFFFFFF, &intVal))
+ return 0;
+ src->mOffset = static_cast<uint>(intVal);
+ }
+ else
+ src->mOffset = 0;
+ if(!TrReadOperator(tr, ":"))
+ return 0;
+ if(!TrReadString(tr, MAX_PATH_LEN, src->mPath))
+ return 0;
+ return 1;
+}
+
+// Parse and validate a SOFA source reference from the data set definition.
+static int ReadSofaRef(TokenReaderT *tr, SourceRefT *src)
+{
+ char ident[MAX_IDENT_LEN+1];
+ uint line, col;
+ int intVal;
+
+ TrIndication(tr, &line, &col);
+ if(!TrReadIdent(tr, MAX_IDENT_LEN, ident))
+ return 0;
+ src->mFormat = MatchSourceFormat(ident);
+ if(src->mFormat != SF_SOFA)
+ {
+ TrErrorAt(tr, line, col, "Expected the SOFA source format.\n");
+ return 0;
+ }
+
+ src->mType = ET_NONE;
+ src->mSize = 0;
+ src->mBits = 0;
+ src->mChannel = 0;
+ src->mSkip = 0;
+
+ if(TrIsOperator(tr, "@"))
+ {
+ TrReadOperator(tr, "@");
+ if(!TrReadInt(tr, 0, 0x7FFFFFFF, &intVal))
+ return 0;
+ src->mOffset = static_cast<uint>(intVal);
+ }
+ else
+ src->mOffset = 0;
+ if(!TrReadOperator(tr, ":"))
+ return 0;
+ if(!TrReadString(tr, MAX_PATH_LEN, src->mPath))
+ return 0;
+ return 1;
+}
+
+// Match the target ear (index) from a given identifier.
+static int MatchTargetEar(const char *ident)
+{
+ if(al::strcasecmp(ident, "left") == 0)
+ return 0;
+ if(al::strcasecmp(ident, "right") == 0)
+ return 1;
+ return -1;
+}
+
+// Calculate the onset time of an HRIR and average it with any existing
+// timing for its field, elevation, azimuth, and ear.
+static double AverageHrirOnset(const uint rate, const uint n, const double *hrir, const double f, const double onset)
+{
+ std::vector<double> upsampled(10 * n);
+ {
+ ResamplerT rs;
+ ResamplerSetup(&rs, rate, 10 * rate);
+ ResamplerRun(&rs, n, hrir, 10 * n, upsampled.data());
+ }
+
+ double mag{0.0};
+ for(uint i{0u};i < 10*n;i++)
+ mag = std::max(std::abs(upsampled[i]), mag);
+
+ mag *= 0.15;
+ uint i{0u};
+ for(;i < 10*n;i++)
+ {
+ if(std::abs(upsampled[i]) >= mag)
+ break;
+ }
+ return Lerp(onset, static_cast<double>(i) / (10*rate), f);
+}
+
+// Calculate the magnitude response of an HRIR and average it with any
+// existing responses for its field, elevation, azimuth, and ear.
+static void AverageHrirMagnitude(const uint points, const uint n, const double *hrir, const double f, double *mag)
+{
+ uint m = 1 + (n / 2), i;
+ std::vector<complex_d> h(n);
+ std::vector<double> r(n);
+
+ for(i = 0;i < points;i++)
+ h[i] = complex_d{hrir[i], 0.0};
+ for(;i < n;i++)
+ h[i] = complex_d{0.0, 0.0};
+ FftForward(n, h.data());
+ MagnitudeResponse(n, h.data(), r.data());
+ for(i = 0;i < m;i++)
+ mag[i] = Lerp(mag[i], r[i], f);
+}
+
+// Process the list of sources in the data set definition.
+static int ProcessSources(TokenReaderT *tr, HrirDataT *hData)
+{
+ uint channels = (hData->mChannelType == CT_STEREO) ? 2 : 1;
+ hData->mHrirsBase.resize(channels * hData->mIrCount * hData->mIrSize);
+ double *hrirs = hData->mHrirsBase.data();
+ std::vector<double> hrir(hData->mIrPoints);
+ uint line, col, fi, ei, ai;
+ int count;
+
+ printf("Loading sources...");
+ fflush(stdout);
+ count = 0;
+ while(TrIsOperator(tr, "["))
+ {
+ double factor[2]{ 1.0, 1.0 };
+
+ TrIndication(tr, &line, &col);
+ TrReadOperator(tr, "[");
+
+ if(TrIsOperator(tr, "*"))
+ {
+ SourceRefT src;
+ struct MYSOFA_EASY *sofa;
+ uint si;
+
+ TrReadOperator(tr, "*");
+ if(!TrReadOperator(tr, "]") || !TrReadOperator(tr, "="))
+ return 0;
+
+ TrIndication(tr, &line, &col);
+ if(!ReadSofaRef(tr, &src))
+ return 0;
+
+ if(hData->mChannelType == CT_STEREO)
+ {
+ char type[MAX_IDENT_LEN+1];
+ ChannelTypeT channelType;
+
+ if(!TrReadIdent(tr, MAX_IDENT_LEN, type))
+ return 0;
+
+ channelType = MatchChannelType(type);
+
+ switch(channelType)
+ {
+ case CT_NONE:
+ TrErrorAt(tr, line, col, "Expected a channel type.\n");
+ return 0;
+ case CT_MONO:
+ src.mChannel = 0;
+ break;
+ case CT_STEREO:
+ src.mChannel = 1;
+ break;
+ }
+ }
+ else
+ {
+ char type[MAX_IDENT_LEN+1];
+ ChannelTypeT channelType;
+
+ if(!TrReadIdent(tr, MAX_IDENT_LEN, type))
+ return 0;
+
+ channelType = MatchChannelType(type);
+ if(channelType != CT_MONO)
+ {
+ TrErrorAt(tr, line, col, "Expected a mono channel type.\n");
+ return 0;
+ }
+ src.mChannel = 0;
+ }
+
+ sofa = LoadSofaFile(&src, hData->mIrRate, hData->mIrPoints);
+ if(!sofa) return 0;
+
+ for(si = 0;si < sofa->hrtf->M;si++)
+ {
+ printf("\rLoading sources... %d of %d", si+1, sofa->hrtf->M);
+ fflush(stdout);
+
+ float aer[3] = {
+ sofa->hrtf->SourcePosition.values[3*si],
+ sofa->hrtf->SourcePosition.values[3*si + 1],
+ sofa->hrtf->SourcePosition.values[3*si + 2]
+ };
+ mysofa_c2s(aer);
+
+ if(std::fabs(aer[1]) >= 89.999f)
+ aer[0] = 0.0f;
+ else
+ aer[0] = std::fmod(360.0f - aer[0], 360.0f);
+
+ for(fi = 0;fi < hData->mFdCount;fi++)
+ {
+ double delta = aer[2] - hData->mFds[fi].mDistance;
+ if(std::abs(delta) < 0.001) break;
+ }
+ if(fi >= hData->mFdCount)
+ continue;
+
+ double ef{(90.0 + aer[1]) / 180.0 * (hData->mFds[fi].mEvCount - 1)};
+ ei = static_cast<uint>(std::round(ef));
+ ef = (ef - ei) * 180.0 / (hData->mFds[fi].mEvCount - 1);
+ if(std::abs(ef) >= 0.1)
+ continue;
+
+ double af{aer[0] / 360.0 * hData->mFds[fi].mEvs[ei].mAzCount};
+ ai = static_cast<uint>(std::round(af));
+ af = (af - ai) * 360.0 / hData->mFds[fi].mEvs[ei].mAzCount;
+ ai = ai % hData->mFds[fi].mEvs[ei].mAzCount;
+ if(std::abs(af) >= 0.1)
+ continue;
+
+ HrirAzT *azd = &hData->mFds[fi].mEvs[ei].mAzs[ai];
+ if(azd->mIrs[0] != nullptr)
+ {
+ TrErrorAt(tr, line, col, "Redefinition of source [ %d, %d, %d ].\n", fi, ei, ai);
+ return 0;
+ }
+
+ ExtractSofaHrir(sofa, si, 0, src.mOffset, hData->mIrPoints, hrir.data());
+ azd->mIrs[0] = &hrirs[hData->mIrSize * azd->mIndex];
+ azd->mDelays[0] = AverageHrirOnset(hData->mIrRate, hData->mIrPoints, hrir.data(), 1.0, azd->mDelays[0]);
+ AverageHrirMagnitude(hData->mIrPoints, hData->mFftSize, hrir.data(), 1.0, azd->mIrs[0]);
+
+ if(src.mChannel == 1)
+ {
+ ExtractSofaHrir(sofa, si, 1, src.mOffset, hData->mIrPoints, hrir.data());
+ azd->mIrs[1] = &hrirs[hData->mIrSize * (hData->mIrCount + azd->mIndex)];
+ azd->mDelays[1] = AverageHrirOnset(hData->mIrRate, hData->mIrPoints, hrir.data(), 1.0, azd->mDelays[1]);
+ AverageHrirMagnitude(hData->mIrPoints, hData->mFftSize, hrir.data(), 1.0, azd->mIrs[1]);
+ }
+
+ // TODO: Since some SOFA files contain minimum phase HRIRs,
+ // it would be beneficial to check for per-measurement delays
+ // (when available) to reconstruct the HRTDs.
+ }
+
+ continue;
+ }
+
+ if(!ReadIndexTriplet(tr, hData, &fi, &ei, &ai))
+ return 0;
+ if(!TrReadOperator(tr, "]"))
+ return 0;
+ HrirAzT *azd = &hData->mFds[fi].mEvs[ei].mAzs[ai];
+
+ if(azd->mIrs[0] != nullptr)
+ {
+ TrErrorAt(tr, line, col, "Redefinition of source.\n");
+ return 0;
+ }
+ if(!TrReadOperator(tr, "="))
+ return 0;
+
+ for(;;)
+ {
+ SourceRefT src;
+
+ if(!ReadSourceRef(tr, &src))
+ return 0;
+
+ // TODO: Would be nice to display 'x of y files', but that would
+ // require preparing the source refs first to get a total count
+ // before loading them.
+ ++count;
+ printf("\rLoading sources... %d file%s", count, (count==1)?"":"s");
+ fflush(stdout);
+
+ if(!LoadSource(&src, hData->mIrRate, hData->mIrPoints, hrir.data()))
+ return 0;
+
+ uint ti{0};
+ if(hData->mChannelType == CT_STEREO)
+ {
+ char ident[MAX_IDENT_LEN+1];
+
+ if(!TrReadIdent(tr, MAX_IDENT_LEN, ident))
+ return 0;
+ ti = static_cast<uint>(MatchTargetEar(ident));
+ if(static_cast<int>(ti) < 0)
+ {
+ TrErrorAt(tr, line, col, "Expected a target ear.\n");
+ return 0;
+ }
+ }
+ azd->mIrs[ti] = &hrirs[hData->mIrSize * (ti * hData->mIrCount + azd->mIndex)];
+ azd->mDelays[ti] = AverageHrirOnset(hData->mIrRate, hData->mIrPoints, hrir.data(), 1.0 / factor[ti], azd->mDelays[ti]);
+ AverageHrirMagnitude(hData->mIrPoints, hData->mFftSize, hrir.data(), 1.0 / factor[ti], azd->mIrs[ti]);
+ factor[ti] += 1.0;
+ if(!TrIsOperator(tr, "+"))
+ break;
+ TrReadOperator(tr, "+");
+ }
+ if(hData->mChannelType == CT_STEREO)
+ {
+ if(azd->mIrs[0] == nullptr)
+ {
+ TrErrorAt(tr, line, col, "Missing left ear source reference(s).\n");
+ return 0;
+ }
+ else if(azd->mIrs[1] == nullptr)
+ {
+ TrErrorAt(tr, line, col, "Missing right ear source reference(s).\n");
+ return 0;
+ }
+ }
+ }
+ printf("\n");
+ for(fi = 0;fi < hData->mFdCount;fi++)
+ {
+ for(ei = 0;ei < hData->mFds[fi].mEvCount;ei++)
+ {
+ for(ai = 0;ai < hData->mFds[fi].mEvs[ei].mAzCount;ai++)
+ {
+ HrirAzT *azd = &hData->mFds[fi].mEvs[ei].mAzs[ai];
+ if(azd->mIrs[0] != nullptr)
+ break;
+ }
+ if(ai < hData->mFds[fi].mEvs[ei].mAzCount)
+ break;
+ }
+ if(ei >= hData->mFds[fi].mEvCount)
+ {
+ TrError(tr, "Missing source references [ %d, *, * ].\n", fi);
+ return 0;
+ }
+ hData->mFds[fi].mEvStart = ei;
+ for(;ei < hData->mFds[fi].mEvCount;ei++)
+ {
+ for(ai = 0;ai < hData->mFds[fi].mEvs[ei].mAzCount;ai++)
+ {
+ HrirAzT *azd = &hData->mFds[fi].mEvs[ei].mAzs[ai];
+
+ if(azd->mIrs[0] == nullptr)
+ {
+ TrError(tr, "Missing source reference [ %d, %d, %d ].\n", fi, ei, ai);
+ return 0;
+ }
+ }
+ }
+ }
+ for(uint ti{0};ti < channels;ti++)
+ {
+ for(fi = 0;fi < hData->mFdCount;fi++)
+ {
+ for(ei = 0;ei < hData->mFds[fi].mEvCount;ei++)
+ {
+ for(ai = 0;ai < hData->mFds[fi].mEvs[ei].mAzCount;ai++)
+ {
+ HrirAzT *azd = &hData->mFds[fi].mEvs[ei].mAzs[ai];
+
+ azd->mIrs[ti] = &hrirs[hData->mIrSize * (ti * hData->mIrCount + azd->mIndex)];
+ }
+ }
+ }
+ }
+ if(!TrLoad(tr))
+ {
+ mysofa_cache_release_all();
+ return 1;
+ }
+
+ TrError(tr, "Errant data at end of source list.\n");
+ mysofa_cache_release_all();
+ return 0;
+}
+
+
+bool LoadDefInput(std::istream &istream, const char *startbytes, std::streamsize startbytecount,
+ const char *filename, const uint fftSize, const uint truncSize, const ChannelModeT chanMode,
+ HrirDataT *hData)
+{
+ TokenReaderT tr{istream};
+
+ TrSetup(startbytes, startbytecount, filename, &tr);
+ if(!ProcessMetrics(&tr, fftSize, truncSize, chanMode, hData)
+ || !ProcessSources(&tr, hData))
+ return false;
+
+ return true;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-01 07:11:35 +0000