From 19971be307d5c9ca07fd6d8067134368b1e77b32 Mon Sep 17 00:00:00 2001 From: Max Kellermann Date: Tue, 23 Sep 2008 23:59:55 +0200 Subject: flac: added special functions for 8 and 32 bit Same optimization for 8 and 32 bit files, like the previous patch for 16 bit. Along the way, this patch adds 24 bit FLAC support! --- src/inputPlugins/_flac_common.c | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) (limited to 'src') diff --git a/src/inputPlugins/_flac_common.c b/src/inputPlugins/_flac_common.c index 23c31a829..19d7f0a26 100644 --- a/src/inputPlugins/_flac_common.c +++ b/src/inputPlugins/_flac_common.c @@ -232,6 +232,35 @@ flac_convert_16(int16_t *dest, *dest++ = buf[c_chan][position]; } +/** + * Note: this function also handles 24 bit files! + */ +static void +flac_convert_32(int32_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_8(int8_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, @@ -282,6 +311,14 @@ flac_common_write(FlacData *data, const FLAC__Frame * frame, flac_convert_16((int16_t*)data->chunk, num_channels, buf, c_samp, c_samp + num_samples); + else if (bytes_per_sample == 4) + flac_convert_32((int32_t*)data->chunk, + num_channels, buf, c_samp, + c_samp + num_samples); + else if (bytes_per_sample == 1) + flac_convert_8((int8_t*)data->chunk, + num_channels, buf, c_samp, + c_samp + num_samples); else flac_convert(data->chunk, num_channels, bytes_per_sample, buf, -- cgit v1.2.3