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add cpuinfo + runtime asm routine selection

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This commit is contained in:
Josh Coalson 2001-05-23 21:59:52 +00:00
parent 126fecc2f7
commit b985bbc4a9
1 changed files with 26 additions and 2 deletions
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28
src/libFLAC/stream_decoder.c
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@ -23,6 +23,7 @@
#include <string.h> /* for memset/memcpy() */
#include "FLAC/stream_decoder.h"
#include "private/bitbuffer.h"
#include "private/cpu.h"
#include "private/crc.h"
#include "private/fixed.h"
#include "private/lpc.h"
@ -32,6 +33,7 @@ typedef struct FLAC__StreamDecoderPrivate {
FLAC__StreamDecoderWriteStatus (*write_callback)(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const int32 *buffer[], void *client_data);
void (*metadata_callback)(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetaData *metadata, void *client_data);
void (*error_callback)(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data);
void (*local_lpc_restore_signal)(const int32 residual[], unsigned data_len, const int32 qlp_coeff[], unsigned order, int lp_quantization, int32 data[]);
void *client_data;
FLAC__BitBuffer input;
int32 *output[FLAC__MAX_CHANNELS];
@ -43,9 +45,10 @@ typedef struct FLAC__StreamDecoderPrivate {
FLAC__StreamMetaData stream_info;
FLAC__StreamMetaData seek_table;
FLAC__Frame frame;
bool cached; /* true if there is a byte in lookahead */
FLAC__CPUInfo cpuinfo;
byte header_warmup[2]; /* contains the sync code and reserved bits */
byte lookahead; /* temp storage when we need to look ahead one byte in the stream */
bool cached; /* true if there is a byte in lookahead */
} FLAC__StreamDecoderPrivate;
static byte ID3V2_TAG_[3] = { 'I', 'D', '3' };
@ -157,6 +160,27 @@ FLAC__StreamDecoderState FLAC__stream_decoder_init(
decoder->guts->has_seek_table = false;
decoder->guts->cached = false;
/*
* get the CPU info and set the function pointers
*/
FLAC__cpu_info(&decoder->guts->cpuinfo);
/* first default to the non-asm routines */
decoder->guts->local_lpc_restore_signal = FLAC__lpc_restore_signal;
/* now override with asm where appropriate */
if(decoder->guts->cpuinfo.use_asm) {
#ifdef FLAC__CPU_IA32
assert(decoder->guts->cpuinfo.type == FLAC__CPUINFO_TYPE_IA32);
#if 0
/* @@@ MMX version needs bps check */
if(decoder->guts->cpuinfo.data.ia32.mmx && @@@bps check here@@@)
decoder->guts->local_lpc_restore_signal = FLAC__lpc_restore_signal_asm_i386_mmx;
else
#endif
fprintf(stderr,"@@@ got _asm_i386 of lpc_restore_signal()\n");
decoder->guts->local_lpc_restore_signal = FLAC__lpc_restore_signal_asm_i386;
#endif
}
return decoder->state;
}
@ -1271,7 +1295,7 @@ bool stream_decoder_read_subframe_lpc_(FLAC__StreamDecoder *decoder, unsigned ch
/* decode the subframe */
memcpy(decoder->guts->output[channel], subframe->warmup, sizeof(int32) * order);
FLAC__lpc_restore_signal(decoder->guts->residual[channel], decoder->guts->frame.header.blocksize-order, subframe->qlp_coeff, order, subframe->quantization_level, decoder->guts->output[channel]+order);
decoder->guts->local_lpc_restore_signal(decoder->guts->residual[channel], decoder->guts->frame.header.blocksize-order, subframe->qlp_coeff, order, subframe->quantization_level, decoder->guts->output[channel]+order);
return true;
}