diff options
author | Stijn Buys <ingar@osirion.org> | 2011-04-16 15:34:12 +0000 |
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committer | Stijn Buys <ingar@osirion.org> | 2011-04-16 15:34:12 +0000 |
commit | 247b7593a943ac35f96039a5e2e5d412fefacadd (patch) | |
tree | bdc6307f5cb4a27f770725f449377dccf1c2c2ef /src/audio/wavfile.cc | |
parent | 1e68f51dc0a135872040d2455e5f4ae0fdd1a733 (diff) |
Renamed audio/wav to audio/wavfile to be consistent with the other file readers.
Diffstat (limited to 'src/audio/wavfile.cc')
-rw-r--r-- | src/audio/wavfile.cc | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/src/audio/wavfile.cc b/src/audio/wavfile.cc new file mode 100644 index 0000000..e61039c --- /dev/null +++ b/src/audio/wavfile.cc @@ -0,0 +1,128 @@ +/* + audio/wavfile.cc + This file is part of the Osirion project and is distributed under + the terms of the GNU General Public License version 2 +*/ + +#include "string.h" + +#include <iostream> +#include <string> + +#include "audio/wav.h" +#include "filesystem/filesystem.h" +#include "sys/sys.h" + +namespace audio +{ + +PCM *Wav::load(std::string const & name) +{ + if (!name.size()) + return 0; + + std::string filename("sounds/"); + filename.append(name); + filename.append(".wav"); + + filesystem::File *wav_file = filesystem::open(filename.c_str()); + if (!wav_file) { + con_warn << "Could not open " << filename << std::endl; + return 0; + } + + unsigned char header[44]; + memset(header, 0, sizeof(header)); + if (!wav_file->read(header, 44)) { + con_warn << "Error reading " << filename << std::endl; + filesystem::close(wav_file); + return 0; + } + + // header RIFF + if (strncmp((char *)header, "RIFF", 4)) { + con_warn << "Error reading " << filename << ": invalid RIFF header!" << std::endl; + filesystem::close(wav_file); + return 0; + } + + // format WAVE + if (strncmp((char *)header + 8, "WAVE", 4) != 0) { + con_warn << "Error reading " << filename << ": invalid WAVE header!" << std::endl; + filesystem::close(wav_file); + return 0; + } + + // file size + //size_t chunksize = header[4] + (header[5] << 8) + (header[6] << 16) + (header[7] << 24); + + if (strncmp((char *)header + 12, "fmt ", 4) != 0) { + con_warn << "Error reading " << filename << ": invalid format header!" << std::endl; + filesystem::close(wav_file); + return 0; + } + + size_t subchunksize1 = header[16] + (header[17] << 8) + (header[18] << 16) + (header[19] << 24); + size_t audioformat = header[20] + (header[21] << 8); + + if ((subchunksize1 != 16) || (audioformat != 1)) { + con_warn << "Error reading " << filename << ": unrecognized file format!" << std::endl; + filesystem::close(wav_file); + return 0; + + } + + unsigned int channels = header[22] + (header[23] << 8); + if ((channels < 1) || (channels > 2)) { + con_warn << "Error reading " << filename << ": invalid number of channels!" << std::endl; + filesystem::close(wav_file); + return 0; + } + + unsigned int samplerate = header[24] + ((size_t)header[25] << 8) + ((size_t)header[26] << 16) + ((size_t)header[27] << 24); + //size_t byterate = header[28] + (header[29] << 8) + (header[30] << 16) + (header[31] << 24); + //size_t blockalign = header[32] + (header[33] << 8); + size_t bitspersample = header[34] + (header[35] << 8); + + if (strncmp((char *)header + 36, "LIST", 4) == 0) { + // this wav file contains meta data (author, title, ..) + // byte 40 through 43 contains the metadata length instead of the datasize + size_t metasize = header[40] + (header[41] << 8) + (header[42] << 16) + (header[43] << 24); + wav_file->skip(metasize); + + // the data header follows the meta data, we overwrite the original metadata header + if (!wav_file->read(header + 36, 8)) { + con_warn << "Error reading " << filename << ": unexpected end of file!" << std::endl; + filesystem::close(wav_file); + return 0; + } + } + + if (strncmp((char *)header + 36, "data", 4) != 0) { + con_warn << "Error reading " << filename << ": invalid data header!" << std::endl; + filesystem::close(wav_file); + return 0; + } + + size_t datasize = header[40] + (header[41] << 8) + (header[42] << 16) + (header[43] << 24); + + PCM *pcm = new PCM(samplerate, bitspersample, channels, datasize); + const size_t readblocksize = channels * (bitspersample / 8); + size_t total_bytes = 0; + + while ((wav_file->read((void *)(*pcm)[total_bytes], readblocksize)) && (total_bytes < datasize)) { + total_bytes += readblocksize; + } + + if (total_bytes < datasize) { + con_warn << "Error reading " << filename << ": file truncated!" << std::endl; + } + + con_debug << " " << filename << " " << pcm->samplerate() << "Hz " << pcm->bitspersample() << "bit " << + pcm->channels() << " chan " << pcm->size() << " bytes" << std::endl; + + filesystem::close(wav_file); + return pcm; +} + +} |