FreeCalypso > hg > gsm-codec-lib
changeset 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 | 195911f2211c |
| children | 8ed838709897 |
| files | doc/Codec-utils |
| diffstat | 1 files changed, 9 insertions(+), 0 deletions(-) [+] |
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--- a/doc/Codec-utils Wed Dec 14 07:04:59 2022 +0000 +++ b/doc/Codec-utils Wed Dec 14 07:25:46 2022 +0000 @@ -37,3 +37,12 @@ WAV reading and writing functions used by the above utilities have been lifted out of opencore-amrnb test code. + +Now that we are starting to encounter use cases that involve more than feeding +a PC microphone recording to test encoders and playing decoder output on PC +speakers, many of those other use cases call for using raw format instead of WAV +for 16-bit linear PCM. While it would be philosophically most proper to add an +option to gsm[e]fr-encode and gsm[e]fr-decode utilities to read/write raw PCM +files instead of WAV, doing so would complicate the code too much. As a +compromise between code simplicity and functionality, we provide lossless +conversion utilities - see PCM-file-formats article.