static Ref<Sound> load_wave_data (const Ptr<IData> data) { DecoderT decoder = NULL; Shared<Buffer> buffer = data->buffer(); std::size_t i = 4; uint32_t chunk_length; int32_t magic; i += buffer->read(i, chunk_length, LITTLE); i += buffer->read(i, magic, BIG); if (magic != 'WAVE') throw LoadError("Could not load WAV data"); bool found_header; uint16_t audio_format, channel_count, block_align, bits_per_sample; uint32_t sample_frequency, byte_rate; while (i < buffer->size()) { i += buffer->read(i, magic, BIG); i += buffer->read(i, chunk_length, LITTLE); if (magic == 'fmt ') { // Decode header found_header = true; i += buffer->read(i, audio_format, LITTLE); i += buffer->read(i, channel_count, LITTLE); i += buffer->read(i, sample_frequency, LITTLE); i += buffer->read(i, byte_rate, LITTLE); i += buffer->read(i, block_align, LITTLE); i += buffer->read(i, bits_per_sample, LITTLE); i += chunk_length - 16; if (audio_format == 1) { if (bits_per_sample == 8) // Copy samples verbatim. decoder = decode_linear_codec; else // Use PCM16 decoder - will pass through if endian doesn't need to be converted. decoder = decode_pcm16_codec; } else if (audio_format == 7) { //bits_per_sample *= 2; //decoder = decode_ulaw_codec; throw LoadError("Unsupported WAV encoding (ULaw)"); } else { throw LoadError("Unsupported WAV encoding (Unknown)"); } } else if (magic == 'data') { if (!found_header) throw LoadError("Corrupt or truncated data"); StaticBuffer sample_data(&(*buffer)[i], chunk_length); DREAM_ASSERT(decoder != NULL); return decoder(&sample_data, channel_count, bits_per_sample, sample_frequency); } else { // Unknown header i += chunk_length; } } throw LoadError("Corrupt or truncated data"); }