Andreas Huber | e46b7be | 2009-07-14 16:56:47 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2009 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #ifndef ANDROID_WAVEWRITER_H_ |
| 18 | |
| 19 | #define ANDROID_WAVEWRITER_H_ |
| 20 | |
| 21 | namespace android { |
| 22 | |
| 23 | class WaveWriter { |
| 24 | public: |
| 25 | WaveWriter(const char *filename, |
| 26 | uint16_t num_channels, uint32_t sampling_rate) |
| 27 | : mFile(fopen(filename, "wb")), |
| 28 | mTotalBytes(0) { |
| 29 | fwrite("RIFFxxxxWAVEfmt \x10\x00\x00\x00\x01\x00", 1, 22, mFile); |
| 30 | write_u16(num_channels); |
| 31 | write_u32(sampling_rate); |
| 32 | write_u32(sampling_rate * num_channels * 2); |
| 33 | write_u16(num_channels * 2); |
| 34 | write_u16(16); |
| 35 | fwrite("dataxxxx", 1, 8, mFile); |
| 36 | } |
| 37 | |
| 38 | ~WaveWriter() { |
| 39 | fseek(mFile, 40, SEEK_SET); |
| 40 | write_u32(mTotalBytes); |
| 41 | |
| 42 | fseek(mFile, 4, SEEK_SET); |
| 43 | write_u32(36 + mTotalBytes); |
| 44 | |
| 45 | fclose(mFile); |
| 46 | mFile = NULL; |
| 47 | } |
| 48 | |
| 49 | void Append(const void *data, size_t size) { |
| 50 | fwrite(data, 1, size, mFile); |
| 51 | mTotalBytes += size; |
| 52 | } |
| 53 | |
| 54 | private: |
| 55 | void write_u16(uint16_t x) { |
| 56 | fputc(x & 0xff, mFile); |
| 57 | fputc(x >> 8, mFile); |
| 58 | } |
| 59 | |
| 60 | void write_u32(uint32_t x) { |
| 61 | write_u16(x & 0xffff); |
| 62 | write_u16(x >> 16); |
| 63 | } |
| 64 | |
| 65 | FILE *mFile; |
| 66 | size_t mTotalBytes; |
| 67 | }; |
| 68 | |
| 69 | } // namespace android |
| 70 | |
| 71 | #endif // ANDROID_WAVEWRITER_H_ |