FreeCalypso > hg > gsm-codec-lib
comparison doc/Codec-utils @ 144:30c7bc064218
doc/Codec-utils: add note about PCM file format issue
| author | Mychaela Falconia <falcon@freecalypso.org> |
|---|---|
| date | Wed, 14 Dec 2022 07:25:46 +0000 |
| parents | 8eb0e7a39409 |
| children | 04936af99fc8 |
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| 143:195911f2211c | 144:30c7bc064218 |
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| 35 and feeds all frames and BFIs to our EFR decoder. The decoded | 35 and feeds all frames and BFIs to our EFR decoder. The decoded |
| 36 output is written as WAV. | 36 output is written as WAV. |
| 37 | 37 |
| 38 WAV reading and writing functions used by the above utilities have been lifted | 38 WAV reading and writing functions used by the above utilities have been lifted |
| 39 out of opencore-amrnb test code. | 39 out of opencore-amrnb test code. |
| 40 | |
| 41 Now that we are starting to encounter use cases that involve more than feeding | |
| 42 a PC microphone recording to test encoders and playing decoder output on PC | |
| 43 speakers, many of those other use cases call for using raw format instead of WAV | |
| 44 for 16-bit linear PCM. While it would be philosophically most proper to add an | |
| 45 option to gsm[e]fr-encode and gsm[e]fr-decode utilities to read/write raw PCM | |
| 46 files instead of WAV, doing so would complicate the code too much. As a | |
| 47 compromise between code simplicity and functionality, we provide lossless | |
| 48 conversion utilities - see PCM-file-formats article. |