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Adds use of restrict keyword to improve encoding speed.

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Restrict works very poorly in Visual Studio (much slower than without)
so defined flac_restrict in share/compat.h and use that in:

    lpc_compute_residual...()
    lpc_restore_signal...()

As a result, FLAC__lpc_compute_residual_from_qlp_coefficients_wide_intrin_sse41()
offers no advantage for 64-bit compiles and was removed from x86-64 part
of stream_encoder.c

Patch-from: lvqcl <lvqcl.mail@gmail.com>
This commit is contained in:
Erik de Castro Lopo 2013-10-10 18:24:19 +11:00
parent a1abfa3df2
commit cf28c0144b
3 changed files with 13 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
include/share/compat.h
View File

@ -76,6 +76,15 @@
#define inline __inline
#endif
#if defined __INTEL_COMPILER || (defined _MSC_VER && defined _WIN64)
/* MSVS generates VERY slow 32-bit code with __restrict */
#define flac_restrict __restrict
#elif defined __GNUC__
#define flac_restrict __restrict__
#else
#define flac_restrict
#endif
/* adjust for compilers that can't understand using LLU suffix for uint64_t literals */
#ifdef _MSC_VER
#define FLAC__U64L(x) x

8
src/libFLAC/lpc.c
View File

@ -260,7 +260,7 @@ int FLAC__lpc_quantize_coefficients(const FLAC__real lp_coeff[], unsigned order,
return 0;
}
void FLAC__lpc_compute_residual_from_qlp_coefficients(const FLAC__int32 *data, unsigned data_len, const FLAC__int32 qlp_coeff[], unsigned order, int lp_quantization, FLAC__int32 residual[])
void FLAC__lpc_compute_residual_from_qlp_coefficients(const FLAC__int32 * flac_restrict data, unsigned data_len, const FLAC__int32 * flac_restrict qlp_coeff, unsigned order, int lp_quantization, FLAC__int32 * flac_restrict residual)
#if defined(FLAC__OVERFLOW_DETECT) || !defined(FLAC__LPC_UNROLLED_FILTER_LOOPS)
{
FLAC__int64 sumo;
@ -520,7 +520,7 @@ void FLAC__lpc_compute_residual_from_qlp_coefficients(const FLAC__int32 *data, u
}
#endif
void FLAC__lpc_compute_residual_from_qlp_coefficients_wide(const FLAC__int32 *data, unsigned data_len, const FLAC__int32 qlp_coeff[], unsigned order, int lp_quantization, FLAC__int32 residual[])
void FLAC__lpc_compute_residual_from_qlp_coefficients_wide(const FLAC__int32 * flac_restrict data, unsigned data_len, const FLAC__int32 * flac_restrict qlp_coeff, unsigned order, int lp_quantization, FLAC__int32 * flac_restrict residual)
#if defined(FLAC__OVERFLOW_DETECT) || !defined(FLAC__LPC_UNROLLED_FILTER_LOOPS)
{
unsigned i, j;
@ -776,7 +776,7 @@ void FLAC__lpc_compute_residual_from_qlp_coefficients_wide(const FLAC__int32 *da
#endif /* !defined FLAC__INTEGER_ONLY_LIBRARY */
void FLAC__lpc_restore_signal(const FLAC__int32 residual[], unsigned data_len, const FLAC__int32 qlp_coeff[], unsigned order, int lp_quantization, FLAC__int32 data[])
void FLAC__lpc_restore_signal(const FLAC__int32 * flac_restrict residual, unsigned data_len, const FLAC__int32 * flac_restrict qlp_coeff, unsigned order, int lp_quantization, FLAC__int32 * flac_restrict data)
#if defined(FLAC__OVERFLOW_DETECT) || !defined(FLAC__LPC_UNROLLED_FILTER_LOOPS)
{
FLAC__int64 sumo;
@ -1037,7 +1037,7 @@ void FLAC__lpc_restore_signal(const FLAC__int32 residual[], unsigned data_len, c
}
#endif
void FLAC__lpc_restore_signal_wide(const FLAC__int32 residual[], unsigned data_len, const FLAC__int32 qlp_coeff[], unsigned order, int lp_quantization, FLAC__int32 data[])
void FLAC__lpc_restore_signal_wide(const FLAC__int32 * flac_restrict residual, unsigned data_len, const FLAC__int32 * flac_restrict qlp_coeff, unsigned order, int lp_quantization, FLAC__int32 * flac_restrict data)
#if defined(FLAC__OVERFLOW_DETECT) || !defined(FLAC__LPC_UNROLLED_FILTER_LOOPS)
{
unsigned i, j;

4
src/libFLAC/stream_encoder.c
View File

@ -942,10 +942,6 @@ static FLAC__StreamEncoderInitStatus init_stream_internal_(
encoder->private_->local_lpc_compute_residual_from_qlp_coefficients = FLAC__lpc_compute_residual_from_qlp_coefficients_intrin_sse2;
encoder->private_->local_lpc_compute_residual_from_qlp_coefficients_16bit = FLAC__lpc_compute_residual_from_qlp_coefficients_16_intrin_sse2;
# ifdef FLAC__SSE4_SUPPORTED
if(encoder->private_->cpuinfo.x86_64.sse41)
encoder->private_->local_lpc_compute_residual_from_qlp_coefficients_64bit = FLAC__lpc_compute_residual_from_qlp_coefficients_wide_intrin_sse41;
# endif
# endif /* FLAC__HAS_X86INTRIN */
# endif /* FLAC__CPU_... */
}