FreeCalypso > hg > gsm-codec-lib
changeset 11:a3aa152c4653
libtest: pcmwrite helper function and module
| author | Mychaela Falconia <falcon@freecalypso.org> |
|---|---|
| date | Sun, 20 Nov 2022 00:31:42 +0000 |
| parents | 820d88b97924 |
| children | f88817a233fb |
| files | libtest/Makefile libtest/pcmwrite.c libtest/pcmwrite.h |
| diffstat | 3 files changed, 29 insertions(+), 1 deletions(-) [+] |
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--- a/libtest/Makefile Sat Nov 19 23:57:42 2022 +0000 +++ b/libtest/Makefile Sun Nov 20 00:31:42 2022 +0000 @@ -1,6 +1,6 @@ CC= gcc CFLAGS= -O2 -OBJS= binreader.o wavreader.o wavwriter.o +OBJS= binreader.o pcmwrite.o wavreader.o wavwriter.o LIB= libtest.a all: ${LIB}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/libtest/pcmwrite.c Sun Nov 20 00:31:42 2022 +0000 @@ -0,0 +1,22 @@ +/* + * Here we implement our PCM write helper function. + */ + +#include <stdint.h> +#include "wavwriter.h" +#include "pcmwrite.h" + +void write_pcm_to_wav(void *wav, const int16_t *pcm) +{ + uint8_t bytes[320], *dp; + int16_t samp; + unsigned n; + + dp = bytes; + for (n = 0; n < 160; n++) { + samp = pcm[n]; + *dp++ = samp & 0xFF; + *dp++ = (samp >> 8) & 0xFF; + } + wav_write_data(wav, bytes, 320); +}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/libtest/pcmwrite.h Sun Nov 20 00:31:42 2022 +0000 @@ -0,0 +1,6 @@ +/* + * This header file declares the interface to our helper function + * for writing 16-bit linear PCM samples to WAV output file. + */ + +extern void write_pcm_to_wav(void *wav, const int16_t *pcm);