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add support for 64bit datapath through inverse filter

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This commit is contained in:
Josh Coalson 2002-10-04 05:27:49 +00:00
parent eac1024aea
commit b6a321968a
1 changed files with 5 additions and 1 deletions
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6
src/libFLAC/stream_decoder.c
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@ -78,6 +78,7 @@ typedef struct FLAC__StreamDecoderPrivate {
FLAC__StreamDecoderMetadataCallback metadata_callback;
FLAC__StreamDecoderErrorCallback error_callback;
void (*local_lpc_restore_signal)(const FLAC__int32 residual[], unsigned data_len, const FLAC__int32 qlp_coeff[], unsigned order, int lp_quantization, FLAC__int32 data[]);
void (*local_lpc_restore_signal_64bit)(const FLAC__int32 residual[], unsigned data_len, const FLAC__int32 qlp_coeff[], unsigned order, int lp_quantization, FLAC__int32 data[]);
void (*local_lpc_restore_signal_16bit)(const FLAC__int32 residual[], unsigned data_len, const FLAC__int32 qlp_coeff[], unsigned order, int lp_quantization, FLAC__int32 data[]);
void *client_data;
FLAC__BitBuffer *input;
@ -260,6 +261,7 @@ FLAC__StreamDecoderState FLAC__stream_decoder_init(FLAC__StreamDecoder *decoder)
FLAC__cpu_info(&decoder->private_->cpuinfo);
/* first default to the non-asm routines */
decoder->private_->local_lpc_restore_signal = FLAC__lpc_restore_signal;
decoder->private_->local_lpc_restore_signal_64bit = FLAC__lpc_restore_signal_wide;
decoder->private_->local_lpc_restore_signal_16bit = FLAC__lpc_restore_signal;
/* now override with asm where appropriate */
#ifndef FLAC__NO_ASM
@ -1741,8 +1743,10 @@ FLAC__bool read_subframe_lpc_(FLAC__StreamDecoder *decoder, unsigned channel, un
memcpy(decoder->private_->output[channel], subframe->warmup, sizeof(FLAC__int32) * order);
if(bps <= 16 && subframe->qlp_coeff_precision <= 16)
decoder->private_->local_lpc_restore_signal_16bit(decoder->private_->residual[channel], decoder->private_->frame.header.blocksize-order, subframe->qlp_coeff, order, subframe->quantization_level, decoder->private_->output[channel]+order);
else
else if(bps + subframe->qlp_coeff_precision + order <= 32)
decoder->private_->local_lpc_restore_signal(decoder->private_->residual[channel], decoder->private_->frame.header.blocksize-order, subframe->qlp_coeff, order, subframe->quantization_level, decoder->private_->output[channel]+order);
else
decoder->private_->local_lpc_restore_signal_64bit(decoder->private_->residual[channel], decoder->private_->frame.header.blocksize-order, subframe->qlp_coeff, order, subframe->quantization_level, decoder->private_->output[channel]+order);
return true;
}