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| author | Max Kellermann <max@duempel.org> | 2008-09-23 23:59:55 +0200 |
|---|---|---|
| committer | Eric Wong <normalperson@yhbt.net> | 2008-09-29 01:51:18 -0700 |
| commit | 5947658caddf0de8288fbae43afaee3c75003ecd (patch) | |
| tree | 7201c2196af264390edb0916d380d8919fe35b7e /src | |
| parent | 1fb82d55a7a1d2c378cab79b03342b8ac471ab64 (diff) | |
| download | mpd-5947658caddf0de8288fbae43afaee3c75003ecd.tar.gz mpd-5947658caddf0de8288fbae43afaee3c75003ecd.tar.xz mpd-5947658caddf0de8288fbae43afaee3c75003ecd.zip | |
flac: added optimized converter for 16 bit
flac_convert_16() runs a lot faster than the generic (and quite buggy)
function flac_convert(). flac_convert_16() is only used for
non-stereo files, since there is already flac_convert_stereo16().
Diffstat (limited to 'src')
| -rw-r--r-- | src/inputPlugins/_flac_common.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/src/inputPlugins/_flac_common.c b/src/inputPlugins/_flac_common.c index 3085660b3..7ccdce1ac 100644 --- a/src/inputPlugins/_flac_common.c +++ b/src/inputPlugins/_flac_common.c @@ -214,6 +214,19 @@ static void flac_convert_stereo16(int16_t *dest, } } +static void +flac_convert_16(int16_t *dest, + unsigned int num_channels, + const FLAC__int32 * const buf[], + unsigned int position, unsigned int end) +{ + unsigned int c_chan; + + for (; position < end; ++position) + for (c_chan = 0; c_chan < num_channels; c_chan++) + *dest++ = buf[c_chan][position]; +} + static void flac_convert(unsigned char *dest, unsigned int num_channels, unsigned int bytes_per_sample, @@ -259,6 +272,10 @@ flac_common_write(FlacData *data, const FLAC__Frame * frame, flac_convert_stereo16((int16_t*)data->chunk, buf, c_samp, c_samp + num_samples); + else if (bytes_per_sample == 2) + flac_convert_16((int16_t*)data->chunk, + num_channels, buf, c_samp, + c_samp + num_samples); else flac_convert(data->chunk, num_channels, bytes_per_sample, buf, |