Initial import of libFLAC from flac-1.1.2.tar.gz

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@5983 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 197 insertions, 0 deletions

diff --git a/apps/codecs/libFLAC/include/private/lpc.h b/apps/codecs/libFLAC/include/private/lpc.h
new file mode 100644
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+++ b/apps/codecs/libFLAC/include/private/lpc.h
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+/* libFLAC - Free Lossless Audio Codec library
+ * Copyright (C) 2000,2001,2002,2003,2004,2005  Josh Coalson
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * - Neither the name of the Xiph.org Foundation nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef FLAC__PRIVATE__LPC_H
+#define FLAC__PRIVATE__LPC_H
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "private/float.h"
+#include "FLAC/format.h"
+
+#ifndef FLAC__INTEGER_ONLY_LIBRARY
+
+/*
+ *      FLAC__lpc_compute_autocorrelation()
+ *      --------------------------------------------------------------------
+ *      Compute the autocorrelation for lags between 0 and lag-1.
+ *      Assumes data[] outside of [0,data_len-1] == 0.
+ *      Asserts that lag > 0.
+ *
+ *      IN data[0,data_len-1]
+ *      IN data_len
+ *      IN 0 < lag <= data_len
+ *      OUT autoc[0,lag-1]
+ */
+void FLAC__lpc_compute_autocorrelation(const FLAC__real data[], unsigned data_len, unsigned lag, FLAC__real autoc[]);
+#ifndef FLAC__NO_ASM
+#  ifdef FLAC__CPU_IA32
+#    ifdef FLAC__HAS_NASM
+void FLAC__lpc_compute_autocorrelation_asm_ia32(const FLAC__real data[], unsigned data_len, unsigned lag, FLAC__real autoc[]);
+void FLAC__lpc_compute_autocorrelation_asm_ia32_sse_lag_4(const FLAC__real data[], unsigned data_len, unsigned lag, FLAC__real autoc[]);
+void FLAC__lpc_compute_autocorrelation_asm_ia32_sse_lag_8(const FLAC__real data[], unsigned data_len, unsigned lag, FLAC__real autoc[]);
+void FLAC__lpc_compute_autocorrelation_asm_ia32_sse_lag_12(const FLAC__real data[], unsigned data_len, unsigned lag, FLAC__real autoc[]);
+void FLAC__lpc_compute_autocorrelation_asm_ia32_3dnow(const FLAC__real data[], unsigned data_len, unsigned lag, FLAC__real autoc[]);
+#    endif
+#  endif
+#endif
+
+/*
+ *      FLAC__lpc_compute_lp_coefficients()
+ *      --------------------------------------------------------------------
+ *      Computes LP coefficients for orders 1..max_order.
+ *      Do not call if autoc[0] == 0.0.  This means the signal is zero
+ *      and there is no point in calculating a predictor.
+ *
+ *      IN autoc[0,max_order]                      autocorrelation values
+ *      IN 0 < max_order <= FLAC__MAX_LPC_ORDER    max LP order to compute
+ *      OUT lp_coeff[0,max_order-1][0,max_order-1] LP coefficients for each order
+ *      *** IMPORTANT:
+ *      *** lp_coeff[0,max_order-1][max_order,FLAC__MAX_LPC_ORDER-1] are untouched
+ *      OUT error[0,max_order-1]                   error for each order
+ *
+ *      Example: if max_order is 9, the LP coefficients for order 9 will be
+ *               in lp_coeff[8][0,8], the LP coefficients for order 8 will be
+ *                       in lp_coeff[7][0,7], etc.
+ */
+void FLAC__lpc_compute_lp_coefficients(const FLAC__real autoc[], unsigned max_order, FLAC__real lp_coeff[][FLAC__MAX_LPC_ORDER], FLAC__double error[]);
+
+/*
+ *      FLAC__lpc_quantize_coefficients()
+ *      --------------------------------------------------------------------
+ *      Quantizes the LP coefficients.  NOTE: precision + bits_per_sample
+ *      must be less than 32 (sizeof(FLAC__int32)*8).
+ *
+ *      IN lp_coeff[0,order-1]    LP coefficients
+ *      IN order                  LP order
+ *      IN FLAC__MIN_QLP_COEFF_PRECISION < precision
+ *                                desired precision (in bits, including sign
+ *                                bit) of largest coefficient
+ *      OUT qlp_coeff[0,order-1]  quantized coefficients
+ *      OUT shift                 # of bits to shift right to get approximated
+ *                                LP coefficients.  NOTE: could be negative.
+ *      RETURN 0 => quantization OK
+ *             1 => coefficients require too much shifting for *shift to
+ *              fit in the LPC subframe header.  'shift' is unset.
+ *         2 => coefficients are all zero, which is bad.  'shift' is
+ *              unset.
+ */
+int FLAC__lpc_quantize_coefficients(const FLAC__real lp_coeff[], unsigned order, unsigned precision, FLAC__int32 qlp_coeff[], int *shift);
+
+/*
+ *      FLAC__lpc_compute_residual_from_qlp_coefficients()
+ *      --------------------------------------------------------------------
+ *      Compute the residual signal obtained from sutracting the predicted
+ *      signal from the original.
+ *
+ *      IN data[-order,data_len-1] original signal (NOTE THE INDICES!)
+ *      IN data_len                length of original signal
+ *      IN qlp_coeff[0,order-1]    quantized LP coefficients
+ *      IN order > 0               LP order
+ *      IN lp_quantization         quantization of LP coefficients in bits
+ *      OUT residual[0,data_len-1] residual signal
+ */
+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_wide(const FLAC__int32 *data, unsigned data_len, const FLAC__int32 qlp_coeff[], unsigned order, int lp_quantization, FLAC__int32 residual[]);
+#ifndef FLAC__NO_ASM
+#  ifdef FLAC__CPU_IA32
+#    ifdef FLAC__HAS_NASM
+void FLAC__lpc_compute_residual_from_qlp_coefficients_asm_ia32(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_asm_ia32_mmx(const FLAC__int32 *data, unsigned data_len, const FLAC__int32 qlp_coeff[], unsigned order, int lp_quantization, FLAC__int32 residual[]);
+#    endif
+#  endif
+#endif
+
+#endif /* !defined FLAC__INTEGER_ONLY_LIBRARY */
+
+/*
+ *      FLAC__lpc_restore_signal()
+ *      --------------------------------------------------------------------
+ *      Restore the original signal by summing the residual and the
+ *      predictor.
+ *
+ *      IN residual[0,data_len-1]  residual signal
+ *      IN data_len                length of original signal
+ *      IN qlp_coeff[0,order-1]    quantized LP coefficients
+ *      IN order > 0               LP order
+ *      IN lp_quantization         quantization of LP coefficients in bits
+ *      *** IMPORTANT: the caller must pass in the historical samples:
+ *      IN  data[-order,-1]        previously-reconstructed historical samples
+ *      OUT data[0,data_len-1]     original signal
+ */
+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_wide(const FLAC__int32 residual[], unsigned data_len, const FLAC__int32 qlp_coeff[], unsigned order, int lp_quantization, FLAC__int32 data[]);
+#ifndef FLAC__NO_ASM
+#  ifdef FLAC__CPU_IA32
+#    ifdef FLAC__HAS_NASM
+void FLAC__lpc_restore_signal_asm_ia32(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_asm_ia32_mmx(const FLAC__int32 residual[], unsigned data_len, const FLAC__int32 qlp_coeff[], unsigned order, int lp_quantization, FLAC__int32 data[]);
+#    endif /* FLAC__HAS_NASM */
+#  elif defined FLAC__CPU_PPC
+void FLAC__lpc_restore_signal_asm_ppc_altivec_16(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_asm_ppc_altivec_16_order8(const FLAC__int32 residual[], unsigned data_len, const FLAC__int32 qlp_coeff[], unsigned order, int lp_quantization, FLAC__int32 data[]);
+#  endif/* FLAC__CPU_IA32 || FLAC__CPU_PPC */
+#endif /* FLAC__NO_ASM */
+
+#ifndef FLAC__INTEGER_ONLY_LIBRARY
+
+/*
+ *      FLAC__lpc_compute_expected_bits_per_residual_sample()
+ *      --------------------------------------------------------------------
+ *      Compute the expected number of bits per residual signal sample
+ *      based on the LP error (which is related to the residual variance).
+ *
+ *      IN lpc_error >= 0.0   error returned from calculating LP coefficients
+ *      IN total_samples > 0  # of samples in residual signal
+ *      RETURN                expected bits per sample
+ */
+FLAC__double FLAC__lpc_compute_expected_bits_per_residual_sample(FLAC__double lpc_error, unsigned total_samples);
+FLAC__double FLAC__lpc_compute_expected_bits_per_residual_sample_with_error_scale(FLAC__double lpc_error, FLAC__double error_scale);
+
+/*
+ *      FLAC__lpc_compute_best_order()
+ *      --------------------------------------------------------------------
+ *      Compute the best order from the array of signal errors returned
+ *      during coefficient computation.
+ *
+ *      IN lpc_error[0,max_order-1] >= 0.0  error returned from calculating LP coefficients
+ *      IN max_order > 0                    max LP order
+ *      IN total_samples > 0                # of samples in residual signal
+ *      IN bits_per_signal_sample           # of bits per sample in the original signal
+ *      RETURN [1,max_order]                best order
+ */
+unsigned FLAC__lpc_compute_best_order(const FLAC__double lpc_error[], unsigned max_order, unsigned total_samples, unsigned bits_per_signal_sample);
+
+#endif /* !defined FLAC__INTEGER_ONLY_LIBRARY */
+
+#endif