-static inline uint16_t read16LE(PHYSFS_file* file)
-{
- uint16_t result;
- if(PHYSFS_readULE16(file, &result) == 0)
- throw std::runtime_error("file too short");
-
- return result;
-}
-
-WavSoundFile::WavSoundFile(PHYSFS_file* file)
-{
- this->file = file;
-
- char magic[4];
- if(PHYSFS_read(file, magic, sizeof(magic), 1) != 1)
- throw std::runtime_error("Couldn't read file magic (not a wave file)");
- if(strncmp(magic, "RIFF", 4) != 0) {
- log_debug << "MAGIC: " << magic << std::endl;
- throw std::runtime_error("file is not a RIFF wav file");
- }
-
- uint32_t wavelen = read32LE(file);
- (void) wavelen;
-
- if(PHYSFS_read(file, magic, sizeof(magic), 1) != 1)
- throw std::runtime_error("Couldn't read chunk header (not a wav file?)");
- if(strncmp(magic, "WAVE", 4) != 0)
- throw std::runtime_error("file is not a valid RIFF/WAVE file");
-
- char chunkmagic[4];
- uint32_t chunklen;
-
- // search audio data format chunk
- do {
- if(PHYSFS_read(file, chunkmagic, sizeof(chunkmagic), 1) != 1)
- throw std::runtime_error("EOF while searching format chunk");
- chunklen = read32LE(file);
-
- if(strncmp(chunkmagic, "fmt ", 4) == 0)
- break;
-
- if(strncmp(chunkmagic, "fact", 4) == 0
- || strncmp(chunkmagic, "LIST", 4) == 0) {
- // skip chunk
- if(PHYSFS_seek(file, PHYSFS_tell(file) + chunklen) == 0)
- throw std::runtime_error("EOF while searching fmt chunk");
- } else {
- throw std::runtime_error("complex WAVE files not supported");
- }
- } while(true);
-
- if(chunklen < 16)
- throw std::runtime_error("Format chunk too short");
-
- // parse format
- uint16_t encoding = read16LE(file);
- if(encoding != 1)
- throw std::runtime_error("only PCM encoding supported");
- channels = read16LE(file);
- rate = read32LE(file);
- uint32_t byterate = read32LE(file);
- (void) byterate;
- uint16_t blockalign = read16LE(file);
- (void) blockalign;
- bits_per_sample = read16LE(file);
-
- if(chunklen > 16) {
- if(PHYSFS_seek(file, PHYSFS_tell(file) + (chunklen-16)) == 0)
- throw std::runtime_error("EOF while reading reast of format chunk");
- }
-
- // set file offset to DATA chunk data
- do {
- if(PHYSFS_read(file, chunkmagic, sizeof(chunkmagic), 1) != 1)
- throw std::runtime_error("EOF while searching data chunk");
- chunklen = read32LE(file);
-
- if(strncmp(chunkmagic, "data", 4) == 0)
- break;
-
- // skip chunk
- if(PHYSFS_seek(file, PHYSFS_tell(file) + chunklen) == 0)
- throw std::runtime_error("EOF while searching fmt chunk");
- } while(true);
-
- datastart = PHYSFS_tell(file);
- size = static_cast<size_t> (chunklen);
-}
-
-WavSoundFile::~WavSoundFile()
-{
- PHYSFS_close(file);
-}
-
-void
-WavSoundFile::reset()
-{
- if(PHYSFS_seek(file, datastart) == 0)
- throw std::runtime_error("Couldn't seek to data start");
-}
-
-size_t
-WavSoundFile::read(void* buffer, size_t buffer_size)
-{
- PHYSFS_sint64 end = datastart + size;
- PHYSFS_sint64 cur = PHYSFS_tell(file);
- if(cur >= end)
- return 0;
-
- size_t readsize = std::min(static_cast<size_t> (end - cur), buffer_size);
- if(PHYSFS_read(file, buffer, readsize, 1) != 1)
- throw std::runtime_error("read error while reading samples");
-
-#ifdef WORDS_BIGENDIAN
- if (bits_per_sample != 16)
- return readsize;
- char *tmp = (char*)buffer;
-
- size_t i;
- char c;
- for (i = 0; i < readsize / 2; i++)
- {
- c = tmp[2*i];
- tmp[2*i] = tmp[2*i+1];
- tmp[2*i+1] = c;
- }
-
- buffer = tmp;
-#endif
-
- return readsize;
-}
-
-//---------------------------------------------------------------------------
-
-class OggSoundFile : public SoundFile
-{
-public:
- OggSoundFile(PHYSFS_file* file, double loop_begin, double loop_at);
- ~OggSoundFile();
-
- size_t read(void* buffer, size_t buffer_size);
- void reset();
-
-private:
- static size_t cb_read(void* ptr, size_t size, size_t nmemb, void* source);
- static int cb_seek(void* source, ogg_int64_t offset, int whence);
- static int cb_close(void* source);
- static long cb_tell(void* source);
-
- PHYSFS_file* file;
- OggVorbis_File vorbis_file;
- ogg_int64_t loop_begin;
- ogg_int64_t loop_at;
- size_t normal_buffer_loop;
-};
-
-OggSoundFile::OggSoundFile(PHYSFS_file* file, double loop_begin, double loop_at)
-{
- this->file = file;
-
- ov_callbacks callbacks = { cb_read, cb_seek, cb_close, cb_tell };
- ov_open_callbacks(file, &vorbis_file, 0, 0, callbacks);
-
- vorbis_info* vi = ov_info(&vorbis_file, -1);
-
- channels = vi->channels;
- rate = vi->rate;
- bits_per_sample = 16;
- size = static_cast<size_t> (ov_pcm_total(&vorbis_file, -1) * 2);
-
- double sample_len = 1.0f / rate;
- double samples_begin = loop_begin / sample_len;
- double sample_loop = loop_at / sample_len;
-
- this->loop_begin = (ogg_int64_t) samples_begin;
- if(loop_begin < 0) {
- this->loop_at = (ogg_int64_t) -1;
- } else {
- this->loop_at = (ogg_int64_t) sample_loop;
- }
-}
-
-OggSoundFile::~OggSoundFile()
-{
- ov_clear(&vorbis_file);
-}
-
-size_t
-OggSoundFile::read(void* _buffer, size_t buffer_size)
-{
- char* buffer = reinterpret_cast<char*> (_buffer);
- int section = 0;
- size_t totalBytesRead = 0;
-
- while(buffer_size>0) {
-#ifdef WORDS_BIGENDIAN
- int bigendian = 1;
-#else
- int bigendian = 0;
-#endif
-
- size_t bytes_to_read = buffer_size;
- if(loop_at > 0) {
- size_t bytes_per_sample = 2;
- ogg_int64_t time = ov_pcm_tell(&vorbis_file);
- ogg_int64_t samples_left_till_loop = loop_at - time;
- ogg_int64_t bytes_left_till_loop
- = samples_left_till_loop * bytes_per_sample;
- if(bytes_left_till_loop <= 4)
- break;
-
- if(bytes_left_till_loop < (ogg_int64_t) bytes_to_read) {
- bytes_to_read = (size_t) bytes_left_till_loop;
- }
- }
-
- long bytesRead
- = ov_read(&vorbis_file, buffer, bytes_to_read, bigendian,
- 2, 1, §ion);
- if(bytesRead == 0) {
- break;
- }
- buffer_size -= bytesRead;
- buffer += bytesRead;
- totalBytesRead += bytesRead;
- }
-
- return totalBytesRead;
-}
-
-void
-OggSoundFile::reset()
-{
- ov_pcm_seek(&vorbis_file, loop_begin);
-}
-
-size_t
-OggSoundFile::cb_read(void* ptr, size_t size, size_t nmemb, void* source)
-{
- PHYSFS_file* file = reinterpret_cast<PHYSFS_file*> (source);
-
- PHYSFS_sint64 res
- = PHYSFS_read(file, ptr, static_cast<PHYSFS_uint32> (size),
- static_cast<PHYSFS_uint32> (nmemb));
- if(res <= 0)
- return 0;
-
- return static_cast<size_t> (res);
-}
-
-int
-OggSoundFile::cb_seek(void* source, ogg_int64_t offset, int whence)
-{
- PHYSFS_file* file = reinterpret_cast<PHYSFS_file*> (source);
-
- switch(whence) {
- case SEEK_SET:
- if(PHYSFS_seek(file, static_cast<PHYSFS_uint64> (offset)) == 0)
- return -1;
- break;
- case SEEK_CUR:
- if(PHYSFS_seek(file, PHYSFS_tell(file) + offset) == 0)
- return -1;
- break;
- case SEEK_END:
- if(PHYSFS_seek(file, PHYSFS_fileLength(file) + offset) == 0)
- return -1;
- break;
- default:
-#ifdef DEBUG
- assert(false);
-#else
- return -1;
-#endif
- }
- return 0;
-}
-
-int
-OggSoundFile::cb_close(void* source)
-{
- PHYSFS_file* file = reinterpret_cast<PHYSFS_file*> (source);
- PHYSFS_close(file);
- return 0;
-}
-
-long
-OggSoundFile::cb_tell(void* source)
-{
- PHYSFS_file* file = reinterpret_cast<PHYSFS_file*> (source);
- return static_cast<long> (PHYSFS_tell(file));
-}
-
-//---------------------------------------------------------------------------