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| author | Max Kellermann <mk@cm4all.com> | 2008-10-24 08:41:34 +0200 |
|---|---|---|
| committer | Max Kellermann <mk@cm4all.com> | 2008-10-24 08:41:34 +0200 |
| commit | 8b4829c2fe10cd4019ba8c352cf1d4d177e8a064 (patch) | |
| tree | c5f9f558ccf0fe35f648e1a4f873f1fcfa30669a | |
| parent | 5fefa954a32cb8bae15df12d4ffdfe23c86c3802 (diff) | |
| download | mpd-8b4829c2fe10cd4019ba8c352cf1d4d177e8a064.tar.gz mpd-8b4829c2fe10cd4019ba8c352cf1d4d177e8a064.tar.xz mpd-8b4829c2fe10cd4019ba8c352cf1d4d177e8a064.zip | |
pcm_resample: support for libsamplerate < 0.1.3
libsamplerate 0.1.2 didn't have the 32 bit <-> float conversion
routines. Emulate them in case they aren't supported.
Diffstat (limited to '')
| -rw-r--r-- | configure.ac | 5 | ||||
| -rw-r--r-- | src/pcm_resample_libsamplerate.c | 20 |
2 files changed, 25 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index 76f4badb8..04b2b51c5 100644 --- a/configure.ac +++ b/configure.ac @@ -390,6 +390,11 @@ if test x$enable_lsr = xyes; then [enable_lsr=no;AC_MSG_WARN([libsamplerate not found -- disabling])]) fi +if test x$enable_lsr = xyes; then + PKG_CHECK_MODULES([SAMPLERATE_013], [samplerate >= 0.1.3],, + [AC_DEFINE([HAVE_LIBSAMPLERATE_NOINT], 1, [libsamplerate doesn't provide src_int_to_float_array() (<0.1.3)])]) +fi + AM_CONDITIONAL(HAVE_LIBSAMPLERATE, test x$enable_lsr = xyes) if test x$enable_fifo = xyes; then diff --git a/src/pcm_resample_libsamplerate.c b/src/pcm_resample_libsamplerate.c index 43a2a2f26..ced4a90b1 100644 --- a/src/pcm_resample_libsamplerate.c +++ b/src/pcm_resample_libsamplerate.c @@ -154,6 +154,26 @@ pcm_resample_16(uint8_t channels, return data->output_frames_gen * sizeof(*dest_buffer) * channels; } +#ifdef HAVE_LIBSAMPLERATE_NOINT + +/* libsamplerate introduced these functions in v0.1.3 */ + +static void +src_int_to_float_array(const int *in, float *out, int len) +{ + while (len-- > 0) + *out++ = *in++ / (float)(1 << (24 - 1)); +} + +static void +src_float_to_int_array (const float *in, int *out, int len) +{ + while (len-- > 0) + *out++ = *in++ * (float)(1 << (24 - 1)); +} + +#endif + size_t pcm_resample_24(uint8_t channels, unsigned src_rate, |