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fix 24-bit support

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This commit is contained in:
Josh Coalson 2001-02-28 23:47:19 +00:00
parent d2b9453e39
commit 994b5179e3
1 changed files with 30 additions and 53 deletions
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83
src/flac/decode.c
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@ -306,12 +306,12 @@ FLAC__StreamDecoderWriteStatus write_callback(const FLAC__FileDecoder *decoder,
bool is_big_endian = (stream_info->is_wave_out? false : stream_info->is_big_endian);
bool is_unsigned_samples = (stream_info->is_wave_out? bps<=8 : stream_info->is_unsigned_samples);
unsigned wide_samples = frame->header.blocksize, wide_sample, sample, channel, byte;
static signed char scbuffer[FLAC__MAX_BLOCK_SIZE * FLAC__MAX_CHANNELS * ((FLAC__MAX_BITS_PER_SAMPLE+7)>>3)]; /* WATCHOUT: can be up to 2 megs */
unsigned char *ucbuffer = (unsigned char *)scbuffer;
signed short *ssbuffer = (signed short *)scbuffer;
unsigned short *usbuffer = (unsigned short *)scbuffer;
signed *slbuffer = (signed *)scbuffer;
unsigned *ulbuffer = (unsigned *)scbuffer;
static int8 s8buffer[FLAC__MAX_BLOCK_SIZE * FLAC__MAX_CHANNELS * ((FLAC__MAX_BITS_PER_SAMPLE+7)>>3)]; /* WATCHOUT: can be up to 2 megs */
uint8 *u8buffer = (uint8 *)s8buffer;
int16 *s16buffer = (int16 *)s8buffer;
uint16 *u16buffer = (uint16 *)s8buffer;
int32 *s32buffer = (int32 *)s8buffer;
uint32 *u32buffer = (uint32 *)s8buffer;
(void)decoder;
@ -355,83 +355,60 @@ FLAC__StreamDecoderWriteStatus write_callback(const FLAC__FileDecoder *decoder,
if(is_unsigned_samples) {
for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
for(channel = 0; channel < channels; channel++, sample++)
ucbuffer[sample] = buffer[channel][wide_sample] + 0x80;
u8buffer[sample] = buffer[channel][wide_sample] + 0x80;
}
else {
for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
for(channel = 0; channel < channels; channel++, sample++)
scbuffer[sample] = buffer[channel][wide_sample];
s8buffer[sample] = buffer[channel][wide_sample];
}
if(fwrite(ucbuffer, 1, sample, fout) != sample)
if(fwrite(u8buffer, 1, sample, fout) != sample)
return FLAC__STREAM_DECODER_WRITE_ABORT;
}
else if(bps == 16) {
if(is_unsigned_samples) {
for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
for(channel = 0; channel < channels; channel++, sample++)
usbuffer[sample] = buffer[channel][wide_sample] + 0x8000;
u16buffer[sample] = buffer[channel][wide_sample] + 0x8000;
}
else {
for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
for(channel = 0; channel < channels; channel++, sample++)
ssbuffer[sample] = buffer[channel][wide_sample];
s16buffer[sample] = buffer[channel][wide_sample];
}
if(is_big_endian != is_big_endian_host) {
unsigned char tmp;
const unsigned bytes = sample * 2;
for(byte = 0; byte < bytes; byte += 2) {
tmp = ucbuffer[byte];
ucbuffer[byte] = ucbuffer[byte+1];
ucbuffer[byte+1] = tmp;
tmp = u8buffer[byte];
u8buffer[byte] = u8buffer[byte+1];
u8buffer[byte+1] = tmp;
}
}
if(fwrite(usbuffer, 2, sample, fout) != sample)
if(fwrite(u16buffer, 2, sample, fout) != sample)
return FLAC__STREAM_DECODER_WRITE_ABORT;
}
else if(bps == 24) {
if(is_unsigned_samples) {
for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
for(channel = 0; channel < channels; channel++, sample++)
ulbuffer[sample] = buffer[channel][wide_sample] + 0x800000;
u32buffer[sample] = buffer[channel][wide_sample] + 0x800000;
}
else {
for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
for(channel = 0; channel < channels; channel++, sample++)
slbuffer[sample] = buffer[channel][wide_sample];
s32buffer[sample] = buffer[channel][wide_sample];
}
/*@@@
if(is_big_endian != is_big_endian_host) {
unsigned char tmp;
unsigned lbyte;
const unsigned bytes = sample * 4;
for(lbyte = byte = 0; byte < bytes; byte += 4, lbyte += 3) {
tmp = ucbuffer[byte];
ucbuffer[lbyte] = ucbuffer[byte+2];
ucbuffer[lbyte+2] = tmp;
ucbuffer[lbyte+1] = ucbuffer[byte+1];
}
}
else {
unsigned lbyte;
const unsigned bytes = sample * 4;
for(lbyte = byte = 0; byte < bytes; ) {
ucbuffer[lbyte++] = ucbuffer[byte++];
ucbuffer[lbyte++] = ucbuffer[byte++];
ucbuffer[lbyte++] = ucbuffer[byte++];
byte++;
}
}
*/
if(is_big_endian != is_big_endian_host) {
unsigned char tmp;
const unsigned bytes = sample * 4;
for(byte = 0; byte < bytes; byte += 4) {
tmp = ucbuffer[byte];
ucbuffer[byte] = ucbuffer[byte+3];
ucbuffer[byte+3] = tmp;
tmp = ucbuffer[byte+1];
ucbuffer[byte+1] = ucbuffer[byte+2];
ucbuffer[byte+2] = tmp;
tmp = u8buffer[byte];
u8buffer[byte] = u8buffer[byte+3];
u8buffer[byte+3] = tmp;
tmp = u8buffer[byte+1];
u8buffer[byte+1] = u8buffer[byte+2];
u8buffer[byte+2] = tmp;
}
}
if(is_big_endian) {
@ -439,22 +416,22 @@ FLAC__StreamDecoderWriteStatus write_callback(const FLAC__FileDecoder *decoder,
const unsigned bytes = sample * 4;
for(lbyte = byte = 0; byte < bytes; ) {
byte++;
ucbuffer[lbyte++] = ucbuffer[byte++];
ucbuffer[lbyte++] = ucbuffer[byte++];
ucbuffer[lbyte++] = ucbuffer[byte++];
u8buffer[lbyte++] = u8buffer[byte++];
u8buffer[lbyte++] = u8buffer[byte++];
u8buffer[lbyte++] = u8buffer[byte++];
}
}
else {
unsigned lbyte;
const unsigned bytes = sample * 4;
for(lbyte = byte = 0; byte < bytes; ) {
ucbuffer[lbyte++] = ucbuffer[byte++];
ucbuffer[lbyte++] = ucbuffer[byte++];
ucbuffer[lbyte++] = ucbuffer[byte++];
u8buffer[lbyte++] = u8buffer[byte++];
u8buffer[lbyte++] = u8buffer[byte++];
u8buffer[lbyte++] = u8buffer[byte++];
byte++;
}
}
if(fwrite(ucbuffer, 3, sample, fout) != sample)
if(fwrite(u8buffer, 3, sample, fout) != sample)
return FLAC__STREAM_DECODER_WRITE_ABORT;
}
else {