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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!
This commit is contained in:
Max Kellermann 2008-09-23 23:59:55 +02:00
parent 8c2bde70b0
commit 19971be307
1 changed files with 37 additions and 0 deletions
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37
src/inputPlugins/_flac_common.c
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@ -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,