426 lines
12 KiB
C++
426 lines
12 KiB
C++
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#include "config.h"
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#include "ambdec.h"
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#include <cstring>
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#include <cctype>
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#include <limits>
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#include <string>
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#include <fstream>
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#include <sstream>
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#include "compat.h"
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namespace {
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int readline(std::istream &f, std::string &output)
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{
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while(f.good() && f.peek() == '\n')
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f.ignore();
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std::getline(f, output);
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return !output.empty();
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}
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bool read_clipped_line(std::istream &f, std::string &buffer)
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{
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while(readline(f, buffer))
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{
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std::size_t pos{0};
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while(pos < buffer.length() && std::isspace(buffer[pos]))
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pos++;
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buffer.erase(0, pos);
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std::size_t cmtpos{buffer.find_first_of('#')};
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if(cmtpos < buffer.length())
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buffer.resize(cmtpos);
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while(!buffer.empty() && std::isspace(buffer.back()))
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buffer.pop_back();
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if(!buffer.empty())
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return true;
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}
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return false;
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}
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std::string read_word(std::istream &f)
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{
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std::string ret;
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f >> ret;
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return ret;
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}
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bool is_at_end(const std::string &buffer, std::size_t endpos)
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{
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while(endpos < buffer.length() && std::isspace(buffer[endpos]))
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++endpos;
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if(endpos < buffer.length())
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return false;
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return true;
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}
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bool load_ambdec_speakers(AmbDecConf *conf, std::istream &f, std::string &buffer)
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{
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ALsizei cur = 0;
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while(cur < conf->NumSpeakers)
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{
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std::istringstream istr{buffer};
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std::string cmd{read_word(istr)};
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if(cmd.empty())
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{
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if(!read_clipped_line(f, buffer))
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{
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ERR("Unexpected end of file\n");
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return false;
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}
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continue;
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}
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if(cmd == "add_spkr")
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{
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istr >> conf->Speakers[cur].Name;
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if(istr.fail()) WARN("Name not specified for speaker %u\n", cur+1);
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istr >> conf->Speakers[cur].Distance;
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if(istr.fail()) WARN("Distance not specified for speaker %u\n", cur+1);
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istr >> conf->Speakers[cur].Azimuth;
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if(istr.fail()) WARN("Azimuth not specified for speaker %u\n", cur+1);
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istr >> conf->Speakers[cur].Elevation;
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if(istr.fail()) WARN("Elevation not specified for speaker %u\n", cur+1);
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istr >> conf->Speakers[cur].Connection;
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if(istr.fail()) TRACE("Connection not specified for speaker %u\n", cur+1);
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cur++;
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}
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else
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{
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ERR("Unexpected speakers command: %s\n", cmd.c_str());
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return false;
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}
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istr.clear();
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std::streamsize endpos{istr.tellg()};
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if(!is_at_end(buffer, endpos))
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{
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ERR("Unexpected junk on line: %s\n", buffer.c_str()+endpos);
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return false;
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}
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buffer.clear();
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}
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return true;
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}
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bool load_ambdec_matrix(ALfloat *gains, ALfloat (*matrix)[MAX_AMBI_COEFFS], ALsizei maxrow, std::istream &f, std::string &buffer)
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{
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bool gotgains = false;
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ALsizei cur = 0;
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while(cur < maxrow)
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{
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std::istringstream istr{buffer};
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std::string cmd{read_word(istr)};
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if(cmd.empty())
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{
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if(!read_clipped_line(f, buffer))
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{
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ERR("Unexpected end of file\n");
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return false;
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}
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continue;
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}
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if(cmd == "order_gain")
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{
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ALuint curgain = 0;
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float value;
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while(istr.good())
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{
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istr >> value;
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if(istr.fail()) break;
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if(!istr.eof() && !std::isspace(istr.peek()))
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{
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ERR("Extra junk on gain %u: %s\n", curgain+1, buffer.c_str()+istr.tellg());
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return false;
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}
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if(curgain < MAX_AMBI_ORDER+1)
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gains[curgain++] = value;
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}
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while(curgain < MAX_AMBI_ORDER+1)
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gains[curgain++] = 0.0f;
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gotgains = true;
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}
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else if(cmd == "add_row")
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{
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ALuint curidx = 0;
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float value;
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while(istr.good())
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{
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istr >> value;
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if(istr.fail()) break;
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if(!istr.eof() && !std::isspace(istr.peek()))
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{
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ERR("Extra junk on matrix element %ux%u: %s\n", cur, curidx,
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buffer.c_str()+istr.tellg());
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return false;
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}
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if(curidx < MAX_AMBI_COEFFS)
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matrix[cur][curidx++] = value;
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}
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while(curidx < MAX_AMBI_COEFFS)
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matrix[cur][curidx++] = 0.0f;
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cur++;
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}
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else
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{
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ERR("Unexpected matrix command: %s\n", cmd.c_str());
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return false;
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}
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istr.clear();
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std::streamsize endpos{istr.tellg()};
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if(!is_at_end(buffer, endpos))
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{
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ERR("Unexpected junk on line: %s\n", buffer.c_str()+endpos);
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return false;
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}
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buffer.clear();
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}
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if(!gotgains)
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{
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ERR("Matrix order_gain not specified\n");
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return false;
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}
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return true;
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}
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} // namespace
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int AmbDecConf::load(const char *fname)
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{
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al::ifstream f{fname};
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if(!f.is_open())
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{
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ERR("Failed to open: %s\n", fname);
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return 0;
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}
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std::string buffer;
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while(read_clipped_line(f, buffer))
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{
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std::istringstream istr{buffer};
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std::string command{read_word(istr)};
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if(command.empty())
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{
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ERR("Malformed line: %s\n", buffer.c_str());
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return 0;
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}
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if(command == "/description")
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istr >> Description;
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else if(command == "/version")
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{
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istr >> Version;
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if(!istr.eof() && !std::isspace(istr.peek()))
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{
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ERR("Extra junk after version: %s\n", buffer.c_str()+istr.tellg());
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return 0;
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}
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if(Version != 3)
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{
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ERR("Unsupported version: %u\n", Version);
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return 0;
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}
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}
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else if(command == "/dec/chan_mask")
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{
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istr >> std::hex >> ChanMask >> std::dec;
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if(!istr.eof() && !std::isspace(istr.peek()))
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{
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ERR("Extra junk after mask: %s\n", buffer.c_str()+istr.tellg());
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return 0;
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}
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}
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else if(command == "/dec/freq_bands")
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{
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istr >> FreqBands;
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if(!istr.eof() && !std::isspace(istr.peek()))
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{
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ERR("Extra junk after freq_bands: %s\n", buffer.c_str()+istr.tellg());
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return 0;
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}
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if(FreqBands != 1 && FreqBands != 2)
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{
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ERR("Invalid freq_bands value: %u\n", FreqBands);
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return 0;
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}
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}
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else if(command == "/dec/speakers")
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{
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istr >> NumSpeakers;
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if(!istr.eof() && !std::isspace(istr.peek()))
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{
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ERR("Extra junk after speakers: %s\n", buffer.c_str()+istr.tellg());
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return 0;
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}
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if(NumSpeakers > MAX_OUTPUT_CHANNELS)
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{
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ERR("Unsupported speaker count: %u\n", NumSpeakers);
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return 0;
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}
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}
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else if(command == "/dec/coeff_scale")
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{
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std::string scale = read_word(istr);
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if(scale == "n3d") CoeffScale = AmbDecScale::N3D;
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else if(scale == "sn3d") CoeffScale = AmbDecScale::SN3D;
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else if(scale == "fuma") CoeffScale = AmbDecScale::FuMa;
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else
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{
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ERR("Unsupported coeff scale: %s\n", scale.c_str());
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return 0;
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}
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}
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else if(command == "/opt/xover_freq")
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{
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istr >> XOverFreq;
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if(!istr.eof() && !std::isspace(istr.peek()))
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{
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ERR("Extra junk after xover_freq: %s\n", buffer.c_str()+istr.tellg());
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return 0;
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}
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}
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else if(command == "/opt/xover_ratio")
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{
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istr >> XOverRatio;
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if(!istr.eof() && !std::isspace(istr.peek()))
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{
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ERR("Extra junk after xover_ratio: %s\n", buffer.c_str()+istr.tellg());
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return 0;
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}
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}
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else if(command == "/opt/input_scale" || command == "/opt/nfeff_comp" ||
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command == "/opt/delay_comp" || command == "/opt/level_comp")
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{
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/* Unused */
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read_word(istr);
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}
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else if(command == "/speakers/{")
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{
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std::streamsize endpos{istr.tellg()};
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if(!is_at_end(buffer, endpos))
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{
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ERR("Unexpected junk on line: %s\n", buffer.c_str()+endpos);
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return 0;
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}
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buffer.clear();
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if(!load_ambdec_speakers(this, f, buffer))
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return 0;
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if(!read_clipped_line(f, buffer))
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{
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ERR("Unexpected end of file\n");
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return 0;
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}
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std::istringstream istr2{buffer};
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std::string endmark{read_word(istr2)};
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if(endmark != "/}")
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{
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ERR("Expected /} after speaker definitions, got %s\n", endmark.c_str());
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return 0;
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}
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istr.swap(istr2);
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}
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else if(command == "/lfmatrix/{" || command == "/hfmatrix/{" || command == "/matrix/{")
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{
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std::streamsize endpos{istr.tellg()};
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if(!is_at_end(buffer, endpos))
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{
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ERR("Unexpected junk on line: %s\n", buffer.c_str()+endpos);
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return 0;
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}
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buffer.clear();
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if(FreqBands == 1)
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{
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if(command != "/matrix/{")
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{
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ERR("Unexpected \"%s\" type for a single-band decoder\n", command.c_str());
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return 0;
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}
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if(!load_ambdec_matrix(HFOrderGain, HFMatrix, NumSpeakers, f, buffer))
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return 0;
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}
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else
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{
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if(command == "/lfmatrix/{")
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{
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if(!load_ambdec_matrix(LFOrderGain, LFMatrix, NumSpeakers, f, buffer))
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return 0;
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}
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else if(command == "/hfmatrix/{")
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{
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if(!load_ambdec_matrix(HFOrderGain, HFMatrix, NumSpeakers, f, buffer))
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return 0;
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}
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else
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{
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ERR("Unexpected \"%s\" type for a dual-band decoder\n", command.c_str());
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return 0;
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}
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}
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if(!read_clipped_line(f, buffer))
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{
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ERR("Unexpected end of file\n");
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return 0;
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}
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std::istringstream istr2{buffer};
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std::string endmark{read_word(istr2)};
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if(endmark != "/}")
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{
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ERR("Expected /} after matrix definitions, got %s\n", endmark.c_str());
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return 0;
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}
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istr.swap(istr2);
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}
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else if(command == "/end")
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{
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std::streamsize endpos{istr.tellg()};
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if(!is_at_end(buffer, endpos))
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{
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ERR("Unexpected junk on end: %s\n", buffer.c_str()+endpos);
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return 0;
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}
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return 1;
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}
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else
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{
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ERR("Unexpected command: %s\n", command.c_str());
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return 0;
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}
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istr.clear();
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std::streamsize endpos{istr.tellg()};
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if(!is_at_end(buffer, endpos))
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{
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ERR("Unexpected junk on line: %s\n", buffer.c_str()+endpos);
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return 0;
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}
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buffer.clear();
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}
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ERR("Unexpected end of file\n");
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return 0;
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}
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