[FFmpeg-devel] [PATCH 1/8] sbc: implement SBC decoder (low-complexity subband codec)
Aurelien Jacobs
aurel at gnuage.org
Sun Dec 17 23:47:13 EET 2017
This was originally based on libsbc, and was fully integrated into ffmpeg.
---
doc/general.texi | 2 +
libavcodec/Makefile | 2 +
libavcodec/allcodecs.c | 2 +
libavcodec/avcodec.h | 2 +
libavcodec/codec_desc.c | 14 ++
libavcodec/sbc.c | 316 ++++++++++++++++++++++++++++++++
libavcodec/sbc.h | 118 ++++++++++++
libavcodec/sbcdec.c | 464 +++++++++++++++++++++++++++++++++++++++++++++++
libavcodec/sbcdec_data.c | 127 +++++++++++++
libavcodec/sbcdec_data.h | 44 +++++
10 files changed, 1091 insertions(+)
create mode 100644 libavcodec/sbc.c
create mode 100644 libavcodec/sbc.h
create mode 100644 libavcodec/sbcdec.c
create mode 100644 libavcodec/sbcdec_data.c
create mode 100644 libavcodec/sbcdec_data.h
diff --git a/doc/general.texi b/doc/general.texi
index 26919c9287..ed137f999f 100644
--- a/doc/general.texi
+++ b/doc/general.texi
@@ -1102,6 +1102,8 @@ following image formats are supported:
@tab Real low bitrate AC-3 codec
@item RealAudio Lossless @tab @tab X
@item RealAudio SIPR / ACELP.NET @tab @tab X
+ at item SBC (low-complexity subband codec) @tab @tab X
+ @tab Used in Bluetooth A2DP
@item Shorten @tab @tab X
@item Sierra VMD audio @tab @tab X
@tab Used in Sierra VMD files.
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index ca72138c02..c46d102227 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -581,6 +581,8 @@ OBJS-$(CONFIG_SUBVIEWER_DECODER) += subviewerdec.o ass.o
OBJS-$(CONFIG_SUNRAST_DECODER) += sunrast.o
OBJS-$(CONFIG_SUNRAST_ENCODER) += sunrastenc.o
OBJS-$(CONFIG_LIBRSVG_DECODER) += librsvgdec.o
+OBJS-$(CONFIG_SBC_DECODER) += sbcdec.o sbcdec_data.o sbc.o
+OBJS-$(CONFIG_MSBC_DECODER) += sbcdec.o sbcdec_data.o sbc.o
OBJS-$(CONFIG_SVQ1_DECODER) += svq1dec.o svq1.o svq13.o h263data.o
OBJS-$(CONFIG_SVQ1_ENCODER) += svq1enc.o svq1.o h263data.o \
h263.o ituh263enc.o
diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c
index ed1e7ab06e..9e2480d2d4 100644
--- a/libavcodec/allcodecs.c
+++ b/libavcodec/allcodecs.c
@@ -379,6 +379,7 @@ static void register_all(void)
REGISTER_DECODER(MP3ON4FLOAT, mp3on4float);
REGISTER_DECODER(MPC7, mpc7);
REGISTER_DECODER(MPC8, mpc8);
+ REGISTER_DECODER(MSBC, msbc);
REGISTER_ENCDEC (NELLYMOSER, nellymoser);
REGISTER_DECODER(ON2AVC, on2avc);
REGISTER_ENCDEC (OPUS, opus);
@@ -392,6 +393,7 @@ static void register_all(void)
REGISTER_DECODER(SHORTEN, shorten);
REGISTER_DECODER(SIPR, sipr);
REGISTER_DECODER(SMACKAUD, smackaud);
+ REGISTER_DECODER(SBC, sbc);
REGISTER_ENCDEC (SONIC, sonic);
REGISTER_ENCODER(SONIC_LS, sonic_ls);
REGISTER_DECODER(TAK, tak);
diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index ce089b7c4a..5b7ec8541d 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -634,6 +634,8 @@ enum AVCodecID {
AV_CODEC_ID_ATRAC3PAL,
AV_CODEC_ID_DOLBY_E,
AV_CODEC_ID_APTX,
+ AV_CODEC_ID_SBC,
+ AV_CODEC_ID_MSBC,
/* subtitle codecs */
AV_CODEC_ID_FIRST_SUBTITLE = 0x17000, ///< A dummy ID pointing at the start of subtitle codecs.
diff --git a/libavcodec/codec_desc.c b/libavcodec/codec_desc.c
index c3688de1d6..a69897d379 100644
--- a/libavcodec/codec_desc.c
+++ b/libavcodec/codec_desc.c
@@ -2866,6 +2866,20 @@ static const AVCodecDescriptor codec_descriptors[] = {
.long_name = NULL_IF_CONFIG_SMALL("aptX (Audio Processing Technology for Bluetooth)"),
.props = AV_CODEC_PROP_LOSSY,
},
+ {
+ .id = AV_CODEC_ID_SBC,
+ .type = AVMEDIA_TYPE_AUDIO,
+ .name = "sbc",
+ .long_name = NULL_IF_CONFIG_SMALL("SBC (low-complexity subband codec)"),
+ .props = AV_CODEC_PROP_LOSSY,
+ },
+ {
+ .id = AV_CODEC_ID_MSBC,
+ .type = AVMEDIA_TYPE_AUDIO,
+ .name = "msbc",
+ .long_name = NULL_IF_CONFIG_SMALL("mSBC (wideband speech mono SBC)"),
+ .props = AV_CODEC_PROP_LOSSY,
+ },
/* subtitle codecs */
{
diff --git a/libavcodec/sbc.c b/libavcodec/sbc.c
new file mode 100644
index 0000000000..99d02cc56a
--- /dev/null
+++ b/libavcodec/sbc.c
@@ -0,0 +1,316 @@
+/*
+ * Bluetooth low-complexity, subband codec (SBC)
+ *
+ * Copyright (C) 2017 Aurelien Jacobs <aurel at gnuage.org>
+ * Copyright (C) 2012-2013 Intel Corporation
+ * Copyright (C) 2008-2010 Nokia Corporation
+ * Copyright (C) 2004-2010 Marcel Holtmann <marcel at holtmann.org>
+ * Copyright (C) 2004-2005 Henryk Ploetz <henryk at ploetzli.ch>
+ * Copyright (C) 2005-2008 Brad Midgley <bmidgley at xmission.com>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * SBC common functions for the encoder and decoder
+ */
+
+#include "avcodec.h"
+#include "sbc.h"
+
+/*
+ * Calculates the CRC-8 of the first len bits in data
+ */
+static const uint8_t crc_table[256] = {
+ 0x00, 0x1D, 0x3A, 0x27, 0x74, 0x69, 0x4E, 0x53,
+ 0xE8, 0xF5, 0xD2, 0xCF, 0x9C, 0x81, 0xA6, 0xBB,
+ 0xCD, 0xD0, 0xF7, 0xEA, 0xB9, 0xA4, 0x83, 0x9E,
+ 0x25, 0x38, 0x1F, 0x02, 0x51, 0x4C, 0x6B, 0x76,
+ 0x87, 0x9A, 0xBD, 0xA0, 0xF3, 0xEE, 0xC9, 0xD4,
+ 0x6F, 0x72, 0x55, 0x48, 0x1B, 0x06, 0x21, 0x3C,
+ 0x4A, 0x57, 0x70, 0x6D, 0x3E, 0x23, 0x04, 0x19,
+ 0xA2, 0xBF, 0x98, 0x85, 0xD6, 0xCB, 0xEC, 0xF1,
+ 0x13, 0x0E, 0x29, 0x34, 0x67, 0x7A, 0x5D, 0x40,
+ 0xFB, 0xE6, 0xC1, 0xDC, 0x8F, 0x92, 0xB5, 0xA8,
+ 0xDE, 0xC3, 0xE4, 0xF9, 0xAA, 0xB7, 0x90, 0x8D,
+ 0x36, 0x2B, 0x0C, 0x11, 0x42, 0x5F, 0x78, 0x65,
+ 0x94, 0x89, 0xAE, 0xB3, 0xE0, 0xFD, 0xDA, 0xC7,
+ 0x7C, 0x61, 0x46, 0x5B, 0x08, 0x15, 0x32, 0x2F,
+ 0x59, 0x44, 0x63, 0x7E, 0x2D, 0x30, 0x17, 0x0A,
+ 0xB1, 0xAC, 0x8B, 0x96, 0xC5, 0xD8, 0xFF, 0xE2,
+ 0x26, 0x3B, 0x1C, 0x01, 0x52, 0x4F, 0x68, 0x75,
+ 0xCE, 0xD3, 0xF4, 0xE9, 0xBA, 0xA7, 0x80, 0x9D,
+ 0xEB, 0xF6, 0xD1, 0xCC, 0x9F, 0x82, 0xA5, 0xB8,
+ 0x03, 0x1E, 0x39, 0x24, 0x77, 0x6A, 0x4D, 0x50,
+ 0xA1, 0xBC, 0x9B, 0x86, 0xD5, 0xC8, 0xEF, 0xF2,
+ 0x49, 0x54, 0x73, 0x6E, 0x3D, 0x20, 0x07, 0x1A,
+ 0x6C, 0x71, 0x56, 0x4B, 0x18, 0x05, 0x22, 0x3F,
+ 0x84, 0x99, 0xBE, 0xA3, 0xF0, 0xED, 0xCA, 0xD7,
+ 0x35, 0x28, 0x0F, 0x12, 0x41, 0x5C, 0x7B, 0x66,
+ 0xDD, 0xC0, 0xE7, 0xFA, 0xA9, 0xB4, 0x93, 0x8E,
+ 0xF8, 0xE5, 0xC2, 0xDF, 0x8C, 0x91, 0xB6, 0xAB,
+ 0x10, 0x0D, 0x2A, 0x37, 0x64, 0x79, 0x5E, 0x43,
+ 0xB2, 0xAF, 0x88, 0x95, 0xC6, 0xDB, 0xFC, 0xE1,
+ 0x5A, 0x47, 0x60, 0x7D, 0x2E, 0x33, 0x14, 0x09,
+ 0x7F, 0x62, 0x45, 0x58, 0x0B, 0x16, 0x31, 0x2C,
+ 0x97, 0x8A, 0xAD, 0xB0, 0xE3, 0xFE, 0xD9, 0xC4
+};
+
+uint8_t ff_sbc_crc8(const uint8_t *data, size_t len)
+{
+ uint8_t crc = 0x0f;
+ size_t i;
+ uint8_t octet;
+
+ for (i = 0; i < len / 8; i++)
+ crc = crc_table[crc ^ data[i]];
+
+ octet = data[i];
+ for (i = 0; i < len % 8; i++) {
+ char bit = ((octet ^ crc) & 0x80) >> 7;
+
+ crc = ((crc & 0x7f) << 1) ^ (bit ? 0x1d : 0);
+
+ octet = octet << 1;
+ }
+
+ return crc;
+}
+
+/* A2DP specification: Appendix B, page 69 */
+static const int sbc_offset4[4][4] = {
+ { -1, 0, 0, 0 },
+ { -2, 0, 0, 1 },
+ { -2, 0, 0, 1 },
+ { -2, 0, 0, 1 }
+};
+
+/* A2DP specification: Appendix B, page 69 */
+static const int sbc_offset8[4][8] = {
+ { -2, 0, 0, 0, 0, 0, 0, 1 },
+ { -3, 0, 0, 0, 0, 0, 1, 2 },
+ { -4, 0, 0, 0, 0, 0, 1, 2 },
+ { -4, 0, 0, 0, 0, 0, 1, 2 }
+};
+
+/*
+ * Code straight from the spec to calculate the bits array
+ * Takes a pointer to the frame in question, a pointer to the bits array and
+ * the sampling frequency (as 2 bit integer)
+ */
+static av_always_inline void sbc_calculate_bits_internal(
+ const struct sbc_frame *frame, int (*bits)[8], int subbands)
+{
+ uint8_t sf = frame->frequency;
+
+ if (frame->mode == MONO || frame->mode == DUAL_CHANNEL) {
+ int bitneed[2][8], loudness, max_bitneed, bitcount, slicecount, bitslice;
+ int ch, sb;
+
+ for (ch = 0; ch < frame->channels; ch++) {
+ max_bitneed = 0;
+ if (frame->allocation == SNR) {
+ for (sb = 0; sb < subbands; sb++) {
+ bitneed[ch][sb] = frame->scale_factor[ch][sb];
+ if (bitneed[ch][sb] > max_bitneed)
+ max_bitneed = bitneed[ch][sb];
+ }
+ } else {
+ for (sb = 0; sb < subbands; sb++) {
+ if (frame->scale_factor[ch][sb] == 0)
+ bitneed[ch][sb] = -5;
+ else {
+ if (subbands == 4)
+ loudness = frame->scale_factor[ch][sb] - sbc_offset4[sf][sb];
+ else
+ loudness = frame->scale_factor[ch][sb] - sbc_offset8[sf][sb];
+ if (loudness > 0)
+ bitneed[ch][sb] = loudness / 2;
+ else
+ bitneed[ch][sb] = loudness;
+ }
+ if (bitneed[ch][sb] > max_bitneed)
+ max_bitneed = bitneed[ch][sb];
+ }
+ }
+
+ bitcount = 0;
+ slicecount = 0;
+ bitslice = max_bitneed + 1;
+ do {
+ bitslice--;
+ bitcount += slicecount;
+ slicecount = 0;
+ for (sb = 0; sb < subbands; sb++) {
+ if ((bitneed[ch][sb] > bitslice + 1) && (bitneed[ch][sb] < bitslice + 16))
+ slicecount++;
+ else if (bitneed[ch][sb] == bitslice + 1)
+ slicecount += 2;
+ }
+ } while (bitcount + slicecount < frame->bitpool);
+
+ if (bitcount + slicecount == frame->bitpool) {
+ bitcount += slicecount;
+ bitslice--;
+ }
+
+ for (sb = 0; sb < subbands; sb++) {
+ if (bitneed[ch][sb] < bitslice + 2)
+ bits[ch][sb] = 0;
+ else {
+ bits[ch][sb] = bitneed[ch][sb] - bitslice;
+ if (bits[ch][sb] > 16)
+ bits[ch][sb] = 16;
+ }
+ }
+
+ for (sb = 0; bitcount < frame->bitpool &&
+ sb < subbands; sb++) {
+ if ((bits[ch][sb] >= 2) && (bits[ch][sb] < 16)) {
+ bits[ch][sb]++;
+ bitcount++;
+ } else if ((bitneed[ch][sb] == bitslice + 1) && (frame->bitpool > bitcount + 1)) {
+ bits[ch][sb] = 2;
+ bitcount += 2;
+ }
+ }
+
+ for (sb = 0; bitcount < frame->bitpool &&
+ sb < subbands; sb++) {
+ if (bits[ch][sb] < 16) {
+ bits[ch][sb]++;
+ bitcount++;
+ }
+ }
+
+ }
+
+ } else if (frame->mode == STEREO || frame->mode == JOINT_STEREO) {
+ int bitneed[2][8], loudness, max_bitneed, bitcount, slicecount, bitslice;
+ int ch, sb;
+
+ max_bitneed = 0;
+ if (frame->allocation == SNR) {
+ for (ch = 0; ch < 2; ch++) {
+ for (sb = 0; sb < subbands; sb++) {
+ bitneed[ch][sb] = frame->scale_factor[ch][sb];
+ if (bitneed[ch][sb] > max_bitneed)
+ max_bitneed = bitneed[ch][sb];
+ }
+ }
+ } else {
+ for (ch = 0; ch < 2; ch++) {
+ for (sb = 0; sb < subbands; sb++) {
+ if (frame->scale_factor[ch][sb] == 0)
+ bitneed[ch][sb] = -5;
+ else {
+ if (subbands == 4)
+ loudness = frame->scale_factor[ch][sb] - sbc_offset4[sf][sb];
+ else
+ loudness = frame->scale_factor[ch][sb] - sbc_offset8[sf][sb];
+ if (loudness > 0)
+ bitneed[ch][sb] = loudness / 2;
+ else
+ bitneed[ch][sb] = loudness;
+ }
+ if (bitneed[ch][sb] > max_bitneed)
+ max_bitneed = bitneed[ch][sb];
+ }
+ }
+ }
+
+ bitcount = 0;
+ slicecount = 0;
+ bitslice = max_bitneed + 1;
+ do {
+ bitslice--;
+ bitcount += slicecount;
+ slicecount = 0;
+ for (ch = 0; ch < 2; ch++) {
+ for (sb = 0; sb < subbands; sb++) {
+ if ((bitneed[ch][sb] > bitslice + 1) && (bitneed[ch][sb] < bitslice + 16))
+ slicecount++;
+ else if (bitneed[ch][sb] == bitslice + 1)
+ slicecount += 2;
+ }
+ }
+ } while (bitcount + slicecount < frame->bitpool);
+
+ if (bitcount + slicecount == frame->bitpool) {
+ bitcount += slicecount;
+ bitslice--;
+ }
+
+ for (ch = 0; ch < 2; ch++) {
+ for (sb = 0; sb < subbands; sb++) {
+ if (bitneed[ch][sb] < bitslice + 2) {
+ bits[ch][sb] = 0;
+ } else {
+ bits[ch][sb] = bitneed[ch][sb] - bitslice;
+ if (bits[ch][sb] > 16)
+ bits[ch][sb] = 16;
+ }
+ }
+ }
+
+ ch = 0;
+ sb = 0;
+ while (bitcount < frame->bitpool) {
+ if ((bits[ch][sb] >= 2) && (bits[ch][sb] < 16)) {
+ bits[ch][sb]++;
+ bitcount++;
+ } else if ((bitneed[ch][sb] == bitslice + 1) && (frame->bitpool > bitcount + 1)) {
+ bits[ch][sb] = 2;
+ bitcount += 2;
+ }
+ if (ch == 1) {
+ ch = 0;
+ sb++;
+ if (sb >= subbands)
+ break;
+ } else
+ ch = 1;
+ }
+
+ ch = 0;
+ sb = 0;
+ while (bitcount < frame->bitpool) {
+ if (bits[ch][sb] < 16) {
+ bits[ch][sb]++;
+ bitcount++;
+ }
+ if (ch == 1) {
+ ch = 0;
+ sb++;
+ if (sb >= subbands)
+ break;
+ } else
+ ch = 1;
+ }
+
+ }
+
+}
+
+void ff_sbc_calculate_bits(const struct sbc_frame *frame, int (*bits)[8])
+{
+ if (frame->subbands == 4)
+ sbc_calculate_bits_internal(frame, bits, 4);
+ else
+ sbc_calculate_bits_internal(frame, bits, 8);
+}
diff --git a/libavcodec/sbc.h b/libavcodec/sbc.h
new file mode 100644
index 0000000000..dc6b8a254c
--- /dev/null
+++ b/libavcodec/sbc.h
@@ -0,0 +1,118 @@
+/*
+ * Bluetooth low-complexity, subband codec (SBC)
+ *
+ * Copyright (C) 2017 Aurelien Jacobs <aurel at gnuage.org>
+ * Copyright (C) 2012-2014 Intel Corporation
+ * Copyright (C) 2008-2010 Nokia Corporation
+ * Copyright (C) 2004-2010 Marcel Holtmann <marcel at holtmann.org>
+ * Copyright (C) 2004-2005 Henryk Ploetz <henryk at ploetzli.ch>
+ * Copyright (C) 2005-2006 Brad Midgley <bmidgley at xmission.com>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * SBC common definitions for the encoder and decoder
+ */
+
+#ifndef AVCODEC_SBC_H
+#define AVCODEC_SBC_H
+
+#include "avcodec.h"
+
+#define MSBC_BLOCKS 15
+
+/* sampling frequency */
+#define SBC_FREQ_16000 0x00
+#define SBC_FREQ_32000 0x01
+#define SBC_FREQ_44100 0x02
+#define SBC_FREQ_48000 0x03
+
+/* blocks */
+#define SBC_BLK_4 0x00
+#define SBC_BLK_8 0x01
+#define SBC_BLK_12 0x02
+#define SBC_BLK_16 0x03
+
+/* channel mode */
+#define SBC_MODE_MONO 0x00
+#define SBC_MODE_DUAL_CHANNEL 0x01
+#define SBC_MODE_STEREO 0x02
+#define SBC_MODE_JOINT_STEREO 0x03
+
+/* allocation method */
+#define SBC_AM_LOUDNESS 0x00
+#define SBC_AM_SNR 0x01
+
+/* subbands */
+#define SBC_SB_4 0x00
+#define SBC_SB_8 0x01
+
+/* synchronisation words */
+#define SBC_SYNCWORD 0x9C
+#define MSBC_SYNCWORD 0xAD
+
+/* extra bits of precision for the synthesis filter input data */
+#define SBCDEC_FIXED_EXTRA_BITS 2
+
+/*
+ * Enforce 16 byte alignment for the data, which is supposed to be used
+ * with SIMD optimized code.
+ */
+#define SBC_ALIGN 16
+
+/* This structure contains an unpacked SBC frame.
+ Yes, there is probably quite some unused space herein */
+struct sbc_frame {
+ uint8_t frequency;
+ uint8_t block_mode;
+ uint8_t blocks;
+ enum {
+ MONO = SBC_MODE_MONO,
+ DUAL_CHANNEL = SBC_MODE_DUAL_CHANNEL,
+ STEREO = SBC_MODE_STEREO,
+ JOINT_STEREO = SBC_MODE_JOINT_STEREO
+ } mode;
+ uint8_t channels;
+ enum {
+ LOUDNESS = SBC_AM_LOUDNESS,
+ SNR = SBC_AM_SNR
+ } allocation;
+ uint8_t subband_mode;
+ uint8_t subbands;
+ uint8_t bitpool;
+ uint16_t codesize;
+ uint16_t length;
+
+ /* bit number x set means joint stereo has been used in subband x */
+ uint8_t joint;
+
+ /* only the lower 4 bits of every element are to be used */
+ DECLARE_ALIGNED(SBC_ALIGN, uint32_t, scale_factor)[2][8];
+
+ /* raw integer subband samples in the frame */
+ DECLARE_ALIGNED(SBC_ALIGN, int32_t, sb_sample_f)[16][2][8];
+
+ /* modified subband samples */
+ DECLARE_ALIGNED(SBC_ALIGN, int32_t, sb_sample)[16][2][8];
+};
+
+uint8_t ff_sbc_crc8(const uint8_t *data, size_t len);
+void ff_sbc_calculate_bits(const struct sbc_frame *frame, int (*bits)[8]);
+
+#endif /* AVCODEC_SBC_H */
diff --git a/libavcodec/sbcdec.c b/libavcodec/sbcdec.c
new file mode 100644
index 0000000000..b69ff347ba
--- /dev/null
+++ b/libavcodec/sbcdec.c
@@ -0,0 +1,464 @@
+/*
+ * Bluetooth low-complexity, subband codec (SBC)
+ *
+ * Copyright (C) 2017 Aurelien Jacobs <aurel at gnuage.org>
+ * Copyright (C) 2012-2013 Intel Corporation
+ * Copyright (C) 2008-2010 Nokia Corporation
+ * Copyright (C) 2004-2010 Marcel Holtmann <marcel at holtmann.org>
+ * Copyright (C) 2004-2005 Henryk Ploetz <henryk at ploetzli.ch>
+ * Copyright (C) 2005-2008 Brad Midgley <bmidgley at xmission.com>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * SBC decoder implementation
+ */
+
+#include <stdbool.h>
+#include "avcodec.h"
+#include "internal.h"
+#include "libavutil/intreadwrite.h"
+#include "sbc.h"
+#include "sbcdec_data.h"
+
+struct sbc_decoder_state {
+ int32_t V[2][170];
+ int offset[2][16];
+};
+
+typedef struct SBCDecContext {
+ AVClass *class;
+ DECLARE_ALIGNED(SBC_ALIGN, struct sbc_frame, frame);
+ DECLARE_ALIGNED(SBC_ALIGN, struct sbc_decoder_state, dsp);
+ int (*unpack_frame)(const uint8_t *data, struct sbc_frame *frame,
+ size_t len);
+} SBCDecContext;
+
+/*
+ * Unpacks a SBC frame at the beginning of the stream in data,
+ * which has at most len bytes into frame.
+ * Returns the length in bytes of the packed frame, or a negative
+ * value on error. The error codes are:
+ *
+ * -1 Data stream too short
+ * -2 Sync byte incorrect
+ * -3 CRC8 incorrect
+ * -4 Bitpool value out of bounds
+ */
+static int sbc_unpack_frame_internal(const uint8_t *data,
+ struct sbc_frame *frame, size_t len)
+{
+ unsigned int consumed;
+ /* Will copy the parts of the header that are relevant to crc
+ * calculation here */
+ uint8_t crc_header[11] = { 0 };
+ int crc_pos = 0;
+ int32_t temp;
+
+ uint32_t audio_sample;
+ int ch, sb, blk, bit; /* channel, subband, block and bit standard
+ counters */
+ int bits[2][8]; /* bits distribution */
+ uint32_t levels[2][8]; /* levels derived from that */
+
+ consumed = 32;
+
+ crc_header[0] = data[1];
+ crc_header[1] = data[2];
+ crc_pos = 16;
+
+ if (frame->mode == JOINT_STEREO) {
+ if (len * 8 < consumed + frame->subbands)
+ return -1;
+
+ frame->joint = 0x00;
+ for (sb = 0; sb < frame->subbands - 1; sb++)
+ frame->joint |= ((data[4] >> (7 - sb)) & 0x01) << sb;
+ if (frame->subbands == 4)
+ crc_header[crc_pos / 8] = data[4] & 0xf0;
+ else
+ crc_header[crc_pos / 8] = data[4];
+
+ consumed += frame->subbands;
+ crc_pos += frame->subbands;
+ }
+
+ if (len * 8 < consumed + (4 * frame->subbands * frame->channels))
+ return -1;
+
+ for (ch = 0; ch < frame->channels; ch++) {
+ for (sb = 0; sb < frame->subbands; sb++) {
+ /* FIXME assert(consumed % 4 == 0); */
+ frame->scale_factor[ch][sb] =
+ (data[consumed >> 3] >> (4 - (consumed & 0x7))) & 0x0F;
+ crc_header[crc_pos >> 3] |=
+ frame->scale_factor[ch][sb] << (4 - (crc_pos & 0x7));
+
+ consumed += 4;
+ crc_pos += 4;
+ }
+ }
+
+ if (data[3] != ff_sbc_crc8(crc_header, crc_pos))
+ return -3;
+
+ ff_sbc_calculate_bits(frame, bits);
+
+ for (ch = 0; ch < frame->channels; ch++) {
+ for (sb = 0; sb < frame->subbands; sb++)
+ levels[ch][sb] = (1 << bits[ch][sb]) - 1;
+ }
+
+ for (blk = 0; blk < frame->blocks; blk++) {
+ for (ch = 0; ch < frame->channels; ch++) {
+ for (sb = 0; sb < frame->subbands; sb++) {
+ uint32_t shift;
+
+ if (levels[ch][sb] == 0) {
+ frame->sb_sample[blk][ch][sb] = 0;
+ continue;
+ }
+
+ shift = frame->scale_factor[ch][sb] +
+ 1 + SBCDEC_FIXED_EXTRA_BITS;
+
+ audio_sample = 0;
+ for (bit = 0; bit < bits[ch][sb]; bit++) {
+ if (consumed > len * 8)
+ return -1;
+
+ if ((data[consumed >> 3] >> (7 - (consumed & 0x7))) & 0x01)
+ audio_sample |= 1 << (bits[ch][sb] - bit - 1);
+
+ consumed++;
+ }
+
+ frame->sb_sample[blk][ch][sb] = (int32_t)
+ (((((uint64_t) audio_sample << 1) | 1) << shift) /
+ levels[ch][sb]) - (1 << shift);
+ }
+ }
+ }
+
+ if (frame->mode == JOINT_STEREO) {
+ for (blk = 0; blk < frame->blocks; blk++) {
+ for (sb = 0; sb < frame->subbands; sb++) {
+ if (frame->joint & (0x01 << sb)) {
+ temp = frame->sb_sample[blk][0][sb] +
+ frame->sb_sample[blk][1][sb];
+ frame->sb_sample[blk][1][sb] =
+ frame->sb_sample[blk][0][sb] -
+ frame->sb_sample[blk][1][sb];
+ frame->sb_sample[blk][0][sb] = temp;
+ }
+ }
+ }
+ }
+
+ if ((consumed & 0x7) != 0)
+ consumed += 8 - (consumed & 0x7);
+
+ return consumed >> 3;
+}
+
+static int sbc_unpack_frame(const uint8_t *data, struct sbc_frame *frame,
+ size_t len)
+{
+ if (len < 4)
+ return -1;
+
+ if (data[0] != SBC_SYNCWORD)
+ return -2;
+
+ frame->frequency = (data[1] >> 6) & 0x03;
+ frame->block_mode = (data[1] >> 4) & 0x03;
+
+ switch (frame->block_mode) {
+ case SBC_BLK_4:
+ frame->blocks = 4;
+ break;
+ case SBC_BLK_8:
+ frame->blocks = 8;
+ break;
+ case SBC_BLK_12:
+ frame->blocks = 12;
+ break;
+ case SBC_BLK_16:
+ frame->blocks = 16;
+ break;
+ }
+
+ frame->mode = (data[1] >> 2) & 0x03;
+
+ switch (frame->mode) {
+ case MONO:
+ frame->channels = 1;
+ break;
+ case DUAL_CHANNEL: /* fall-through */
+ case STEREO:
+ case JOINT_STEREO:
+ frame->channels = 2;
+ break;
+ }
+
+ frame->allocation = (data[1] >> 1) & 0x01;
+
+ frame->subband_mode = (data[1] & 0x01);
+ frame->subbands = frame->subband_mode ? 8 : 4;
+
+ frame->bitpool = data[2];
+
+ if ((frame->mode == MONO || frame->mode == DUAL_CHANNEL) &&
+ frame->bitpool > 16 * frame->subbands)
+ return -4;
+
+ if ((frame->mode == STEREO || frame->mode == JOINT_STEREO) &&
+ frame->bitpool > 32 * frame->subbands)
+ return -4;
+
+ return sbc_unpack_frame_internal(data, frame, len);
+}
+
+static int msbc_unpack_frame(const uint8_t *data,
+ struct sbc_frame *frame, size_t len)
+{
+ if (len < 4)
+ return -1;
+
+ if (data[0] != MSBC_SYNCWORD)
+ return -2;
+ if (data[1] != 0)
+ return -2;
+ if (data[2] != 0)
+ return -2;
+
+ frame->frequency = SBC_FREQ_16000;
+ frame->block_mode = SBC_BLK_4;
+ frame->blocks = MSBC_BLOCKS;
+ frame->allocation = LOUDNESS;
+ frame->mode = MONO;
+ frame->channels = 1;
+ frame->subband_mode = 1;
+ frame->subbands = 8;
+ frame->bitpool = 26;
+
+ return sbc_unpack_frame_internal(data, frame, len);
+}
+
+static void sbc_decoder_init(struct sbc_decoder_state *state)
+{
+ int i, ch;
+
+ memset(state->V, 0, sizeof(state->V));
+
+ for (ch = 0; ch < 2; ch++)
+ for (i = 0; i < FF_ARRAY_ELEMS(state->offset[0]); i++)
+ state->offset[ch][i] = (10 * i + 10);
+}
+
+static inline void sbc_synthesize_four(struct sbc_decoder_state *state,
+ struct sbc_frame *frame,
+ int ch, int blk, AVFrame *output_frame)
+{
+ int i, k, idx;
+ int32_t *v = state->V[ch];
+ int *offset = state->offset[ch];
+
+ for (i = 0; i < 8; i++) {
+ /* Shifting */
+ offset[i]--;
+ if (offset[i] < 0) {
+ offset[i] = 79;
+ memcpy(v + 80, v, 9 * sizeof(*v));
+ }
+
+ /* Distribute the new matrix value to the shifted position */
+ v[offset[i]] =
+ ( ff_synmatrix4[i][0] * frame->sb_sample[blk][ch][0] +
+ ff_synmatrix4[i][1] * frame->sb_sample[blk][ch][1] +
+ ff_synmatrix4[i][2] * frame->sb_sample[blk][ch][2] +
+ ff_synmatrix4[i][3] * frame->sb_sample[blk][ch][3] ) >> 15;
+ }
+
+ /* Compute the samples */
+ for (idx = 0, i = 0; i < 4; i++, idx += 5) {
+ k = (i + 4) & 0xf;
+
+ /* Store in output, Q0 */
+ AV_WN16A(&output_frame->data[ch][blk * 8 + i * 2], av_clip_int16(
+ ( v[offset[i] + 0] * ff_sbc_proto_4_40m0[idx + 0] +
+ v[offset[k] + 1] * ff_sbc_proto_4_40m1[idx + 0] +
+ v[offset[i] + 2] * ff_sbc_proto_4_40m0[idx + 1] +
+ v[offset[k] + 3] * ff_sbc_proto_4_40m1[idx + 1] +
+ v[offset[i] + 4] * ff_sbc_proto_4_40m0[idx + 2] +
+ v[offset[k] + 5] * ff_sbc_proto_4_40m1[idx + 2] +
+ v[offset[i] + 6] * ff_sbc_proto_4_40m0[idx + 3] +
+ v[offset[k] + 7] * ff_sbc_proto_4_40m1[idx + 3] +
+ v[offset[i] + 8] * ff_sbc_proto_4_40m0[idx + 4] +
+ v[offset[k] + 9] * ff_sbc_proto_4_40m1[idx + 4] ) >> 15));
+ }
+}
+
+static inline void sbc_synthesize_eight(struct sbc_decoder_state *state,
+ struct sbc_frame *frame,
+ int ch, int blk, AVFrame *output_frame)
+{
+ int i, k, idx;
+ int32_t *v = state->V[ch];
+ int *offset = state->offset[ch];
+
+ for (i = 0; i < 16; i++) {
+ /* Shifting */
+ offset[i]--;
+ if (offset[i] < 0) {
+ offset[i] = 159;
+ memcpy(v + 160, v, 9 * sizeof(*v));
+ }
+
+ /* Distribute the new matrix value to the shifted position */
+ v[offset[i]] =
+ ( ff_synmatrix8[i][0] * frame->sb_sample[blk][ch][0] +
+ ff_synmatrix8[i][1] * frame->sb_sample[blk][ch][1] +
+ ff_synmatrix8[i][2] * frame->sb_sample[blk][ch][2] +
+ ff_synmatrix8[i][3] * frame->sb_sample[blk][ch][3] +
+ ff_synmatrix8[i][4] * frame->sb_sample[blk][ch][4] +
+ ff_synmatrix8[i][5] * frame->sb_sample[blk][ch][5] +
+ ff_synmatrix8[i][6] * frame->sb_sample[blk][ch][6] +
+ ff_synmatrix8[i][7] * frame->sb_sample[blk][ch][7] ) >> 15;
+ }
+
+ /* Compute the samples */
+ for (idx = 0, i = 0; i < 8; i++, idx += 5) {
+ k = (i + 8) & 0xf;
+
+ /* Store in output, Q0 */
+ AV_WN16A(&output_frame->data[ch][blk * 16 + i * 2], av_clip_int16(
+ ( v[offset[i] + 0] * ff_sbc_proto_8_80m0[idx + 0] +
+ v[offset[k] + 1] * ff_sbc_proto_8_80m1[idx + 0] +
+ v[offset[i] + 2] * ff_sbc_proto_8_80m0[idx + 1] +
+ v[offset[k] + 3] * ff_sbc_proto_8_80m1[idx + 1] +
+ v[offset[i] + 4] * ff_sbc_proto_8_80m0[idx + 2] +
+ v[offset[k] + 5] * ff_sbc_proto_8_80m1[idx + 2] +
+ v[offset[i] + 6] * ff_sbc_proto_8_80m0[idx + 3] +
+ v[offset[k] + 7] * ff_sbc_proto_8_80m1[idx + 3] +
+ v[offset[i] + 8] * ff_sbc_proto_8_80m0[idx + 4] +
+ v[offset[k] + 9] * ff_sbc_proto_8_80m1[idx + 4] ) >> 15));
+ }
+}
+
+static void sbc_synthesize_audio(struct sbc_decoder_state *state,
+ struct sbc_frame *frame, AVFrame *output_frame)
+{
+ int ch, blk;
+
+ switch (frame->subbands) {
+ case 4:
+ for (ch = 0; ch < frame->channels; ch++)
+ for (blk = 0; blk < frame->blocks; blk++)
+ sbc_synthesize_four(state, frame, ch, blk, output_frame);
+ break;
+
+ case 8:
+ for (ch = 0; ch < frame->channels; ch++)
+ for (blk = 0; blk < frame->blocks; blk++)
+ sbc_synthesize_eight(state, frame, ch, blk, output_frame);
+ break;
+ }
+}
+
+static int sbc_decode_init(AVCodecContext *avctx)
+{
+ SBCDecContext *sbc = avctx->priv_data;
+ sbc->unpack_frame = sbc_unpack_frame;
+ sbc_decoder_init(&sbc->dsp);
+ return 0;
+}
+
+static int msbc_decode_init(AVCodecContext *avctx)
+{
+ SBCDecContext *sbc = avctx->priv_data;
+ sbc->unpack_frame = msbc_unpack_frame;
+ sbc_decoder_init(&sbc->dsp);
+ return 0;
+}
+
+static int sbc_decode_frame(AVCodecContext *avctx,
+ void *data, int *got_frame_ptr,
+ AVPacket *avpkt)
+{
+ SBCDecContext *sbc = avctx->priv_data;
+ AVFrame *frame = data;
+ int ret;
+
+ if (!sbc)
+ return AVERROR(EIO);
+
+ sbc->frame.length = sbc->unpack_frame(avpkt->data, &sbc->frame, avpkt->size);
+ if (sbc->frame.length <= 0)
+ return sbc->frame.length;
+
+ frame->channels = sbc->frame.channels;
+ frame->format = AV_SAMPLE_FMT_S16P;
+ frame->nb_samples = sbc->frame.blocks * sbc->frame.subbands;
+ if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
+ return ret;
+
+ sbc_synthesize_audio(&sbc->dsp, &sbc->frame, frame);
+
+ *got_frame_ptr = 1;
+
+ return sbc->frame.length;
+}
+
+#if CONFIG_SBC_DECODER
+AVCodec ff_sbc_decoder = {
+ .name = "sbc",
+ .long_name = NULL_IF_CONFIG_SMALL("SBC (low-complexity subband codec)"),
+ .type = AVMEDIA_TYPE_AUDIO,
+ .id = AV_CODEC_ID_SBC,
+ .priv_data_size = sizeof(SBCDecContext),
+ .init = sbc_decode_init,
+ .decode = sbc_decode_frame,
+ .capabilities = AV_CODEC_CAP_DR1,
+ .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
+ .channel_layouts = (const uint64_t[]) { AV_CH_LAYOUT_MONO,
+ AV_CH_LAYOUT_STEREO, 0},
+ .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_S16P,
+ AV_SAMPLE_FMT_NONE },
+ .supported_samplerates = (const int[]) { 16000, 32000, 44100, 48000, 0 },
+};
+#endif
+
+#if CONFIG_MSBC_DECODER
+AVCodec ff_msbc_decoder = {
+ .name = "msbc",
+ .long_name = NULL_IF_CONFIG_SMALL("mSBC (wideband speech mono SBC)"),
+ .type = AVMEDIA_TYPE_AUDIO,
+ .id = AV_CODEC_ID_MSBC,
+ .priv_data_size = sizeof(SBCDecContext),
+ .init = msbc_decode_init,
+ .decode = sbc_decode_frame,
+ .capabilities = AV_CODEC_CAP_DR1,
+ .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
+ .channel_layouts = (const uint64_t[]) { AV_CH_LAYOUT_MONO, 0},
+ .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_S16P,
+ AV_SAMPLE_FMT_NONE },
+ .supported_samplerates = (const int[]) { 16000, 0 },
+};
+#endif
diff --git a/libavcodec/sbcdec_data.c b/libavcodec/sbcdec_data.c
new file mode 100644
index 0000000000..2152162207
--- /dev/null
+++ b/libavcodec/sbcdec_data.c
@@ -0,0 +1,127 @@
+/*
+ * Bluetooth low-complexity, subband codec (SBC)
+ *
+ * Copyright (C) 2017 Aurelien Jacobs <aurel at gnuage.org>
+ * Copyright (C) 2008-2010 Nokia Corporation
+ * Copyright (C) 2004-2010 Marcel Holtmann <marcel at holtmann.org>
+ * Copyright (C) 2004-2005 Henryk Ploetz <henryk at ploetzli.ch>
+ * Copyright (C) 2005-2006 Brad Midgley <bmidgley at xmission.com>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * SBC decoder tables
+ */
+
+#include <stdint.h>
+#include "sbcdec_data.h"
+#include "sbc.h"
+
+#define SS4(val) ((int32_t)val >> 12)
+#define SS8(val) ((int32_t)val >> 14)
+#define SN4(val) ((int32_t)val >> 11 + 1 + SBCDEC_FIXED_EXTRA_BITS)
+#define SN8(val) ((int32_t)val >> 11 + 1 + SBCDEC_FIXED_EXTRA_BITS)
+
+const int32_t ff_sbc_proto_4_40m0[] = {
+ SS4(0x00000000), SS4(0xffa6982f), SS4(0xfba93848), SS4(0x0456c7b8),
+ SS4(0x005967d1), SS4(0xfffb9ac7), SS4(0xff589157), SS4(0xf9c2a8d8),
+ SS4(0x027c1434), SS4(0x0019118b), SS4(0xfff3c74c), SS4(0xff137330),
+ SS4(0xf81b8d70), SS4(0x00ec1b8b), SS4(0xfff0b71a), SS4(0xffe99b00),
+ SS4(0xfef84470), SS4(0xf6fb4370), SS4(0xffcdc351), SS4(0xffe01dc7)
+};
+
+const int32_t ff_sbc_proto_4_40m1[] = {
+ SS4(0xffe090ce), SS4(0xff2c0475), SS4(0xf694f800), SS4(0xff2c0475),
+ SS4(0xffe090ce), SS4(0xffe01dc7), SS4(0xffcdc351), SS4(0xf6fb4370),
+ SS4(0xfef84470), SS4(0xffe99b00), SS4(0xfff0b71a), SS4(0x00ec1b8b),
+ SS4(0xf81b8d70), SS4(0xff137330), SS4(0xfff3c74c), SS4(0x0019118b),
+ SS4(0x027c1434), SS4(0xf9c2a8d8), SS4(0xff589157), SS4(0xfffb9ac7)
+};
+
+const int32_t ff_sbc_proto_8_80m0[] = {
+ SS8(0x00000000), SS8(0xfe8d1970), SS8(0xee979f00), SS8(0x11686100),
+ SS8(0x0172e690), SS8(0xfff5bd1a), SS8(0xfdf1c8d4), SS8(0xeac182c0),
+ SS8(0x0d9daee0), SS8(0x00e530da), SS8(0xffe9811d), SS8(0xfd52986c),
+ SS8(0xe7054ca0), SS8(0x0a00d410), SS8(0x006c1de4), SS8(0xffdba705),
+ SS8(0xfcbc98e8), SS8(0xe3889d20), SS8(0x06af2308), SS8(0x000bb7db),
+ SS8(0xffca00ed), SS8(0xfc3fbb68), SS8(0xe071bc00), SS8(0x03bf7948),
+ SS8(0xffc4e05c), SS8(0xffb54b3b), SS8(0xfbedadc0), SS8(0xdde26200),
+ SS8(0x0142291c), SS8(0xff960e94), SS8(0xff9f3e17), SS8(0xfbd8f358),
+ SS8(0xdbf79400), SS8(0xff405e01), SS8(0xff7d4914), SS8(0xff8b1a31),
+ SS8(0xfc1417b8), SS8(0xdac7bb40), SS8(0xfdbb828c), SS8(0xff762170)
+};
+
+const int32_t ff_sbc_proto_8_80m1[] = {
+ SS8(0xff7c272c), SS8(0xfcb02620), SS8(0xda612700), SS8(0xfcb02620),
+ SS8(0xff7c272c), SS8(0xff762170), SS8(0xfdbb828c), SS8(0xdac7bb40),
+ SS8(0xfc1417b8), SS8(0xff8b1a31), SS8(0xff7d4914), SS8(0xff405e01),
+ SS8(0xdbf79400), SS8(0xfbd8f358), SS8(0xff9f3e17), SS8(0xff960e94),
+ SS8(0x0142291c), SS8(0xdde26200), SS8(0xfbedadc0), SS8(0xffb54b3b),
+ SS8(0xffc4e05c), SS8(0x03bf7948), SS8(0xe071bc00), SS8(0xfc3fbb68),
+ SS8(0xffca00ed), SS8(0x000bb7db), SS8(0x06af2308), SS8(0xe3889d20),
+ SS8(0xfcbc98e8), SS8(0xffdba705), SS8(0x006c1de4), SS8(0x0a00d410),
+ SS8(0xe7054ca0), SS8(0xfd52986c), SS8(0xffe9811d), SS8(0x00e530da),
+ SS8(0x0d9daee0), SS8(0xeac182c0), SS8(0xfdf1c8d4), SS8(0xfff5bd1a)
+};
+
+const int32_t ff_synmatrix4[8][4] = {
+ { SN4(0x05a82798), SN4(0xfa57d868), SN4(0xfa57d868), SN4(0x05a82798) },
+ { SN4(0x030fbc54), SN4(0xf89be510), SN4(0x07641af0), SN4(0xfcf043ac) },
+ { SN4(0x00000000), SN4(0x00000000), SN4(0x00000000), SN4(0x00000000) },
+ { SN4(0xfcf043ac), SN4(0x07641af0), SN4(0xf89be510), SN4(0x030fbc54) },
+ { SN4(0xfa57d868), SN4(0x05a82798), SN4(0x05a82798), SN4(0xfa57d868) },
+ { SN4(0xf89be510), SN4(0xfcf043ac), SN4(0x030fbc54), SN4(0x07641af0) },
+ { SN4(0xf8000000), SN4(0xf8000000), SN4(0xf8000000), SN4(0xf8000000) },
+ { SN4(0xf89be510), SN4(0xfcf043ac), SN4(0x030fbc54), SN4(0x07641af0) }
+};
+
+const int32_t ff_synmatrix8[16][8] = {
+ { SN8(0x05a82798), SN8(0xfa57d868), SN8(0xfa57d868), SN8(0x05a82798),
+ SN8(0x05a82798), SN8(0xfa57d868), SN8(0xfa57d868), SN8(0x05a82798) },
+ { SN8(0x0471ced0), SN8(0xf8275a10), SN8(0x018f8b84), SN8(0x06a6d988),
+ SN8(0xf9592678), SN8(0xfe70747c), SN8(0x07d8a5f0), SN8(0xfb8e3130) },
+ { SN8(0x030fbc54), SN8(0xf89be510), SN8(0x07641af0), SN8(0xfcf043ac),
+ SN8(0xfcf043ac), SN8(0x07641af0), SN8(0xf89be510), SN8(0x030fbc54) },
+ { SN8(0x018f8b84), SN8(0xfb8e3130), SN8(0x06a6d988), SN8(0xf8275a10),
+ SN8(0x07d8a5f0), SN8(0xf9592678), SN8(0x0471ced0), SN8(0xfe70747c) },
+ { SN8(0x00000000), SN8(0x00000000), SN8(0x00000000), SN8(0x00000000),
+ SN8(0x00000000), SN8(0x00000000), SN8(0x00000000), SN8(0x00000000) },
+ { SN8(0xfe70747c), SN8(0x0471ced0), SN8(0xf9592678), SN8(0x07d8a5f0),
+ SN8(0xf8275a10), SN8(0x06a6d988), SN8(0xfb8e3130), SN8(0x018f8b84) },
+ { SN8(0xfcf043ac), SN8(0x07641af0), SN8(0xf89be510), SN8(0x030fbc54),
+ SN8(0x030fbc54), SN8(0xf89be510), SN8(0x07641af0), SN8(0xfcf043ac) },
+ { SN8(0xfb8e3130), SN8(0x07d8a5f0), SN8(0xfe70747c), SN8(0xf9592678),
+ SN8(0x06a6d988), SN8(0x018f8b84), SN8(0xf8275a10), SN8(0x0471ced0) },
+ { SN8(0xfa57d868), SN8(0x05a82798), SN8(0x05a82798), SN8(0xfa57d868),
+ SN8(0xfa57d868), SN8(0x05a82798), SN8(0x05a82798), SN8(0xfa57d868) },
+ { SN8(0xf9592678), SN8(0x018f8b84), SN8(0x07d8a5f0), SN8(0x0471ced0),
+ SN8(0xfb8e3130), SN8(0xf8275a10), SN8(0xfe70747c), SN8(0x06a6d988) },
+ { SN8(0xf89be510), SN8(0xfcf043ac), SN8(0x030fbc54), SN8(0x07641af0),
+ SN8(0x07641af0), SN8(0x030fbc54), SN8(0xfcf043ac), SN8(0xf89be510) },
+ { SN8(0xf8275a10), SN8(0xf9592678), SN8(0xfb8e3130), SN8(0xfe70747c),
+ SN8(0x018f8b84), SN8(0x0471ced0), SN8(0x06a6d988), SN8(0x07d8a5f0) },
+ { SN8(0xf8000000), SN8(0xf8000000), SN8(0xf8000000), SN8(0xf8000000),
+ SN8(0xf8000000), SN8(0xf8000000), SN8(0xf8000000), SN8(0xf8000000) },
+ { SN8(0xf8275a10), SN8(0xf9592678), SN8(0xfb8e3130), SN8(0xfe70747c),
+ SN8(0x018f8b84), SN8(0x0471ced0), SN8(0x06a6d988), SN8(0x07d8a5f0) },
+ { SN8(0xf89be510), SN8(0xfcf043ac), SN8(0x030fbc54), SN8(0x07641af0),
+ SN8(0x07641af0), SN8(0x030fbc54), SN8(0xfcf043ac), SN8(0xf89be510) },
+ { SN8(0xf9592678), SN8(0x018f8b84), SN8(0x07d8a5f0), SN8(0x0471ced0),
+ SN8(0xfb8e3130), SN8(0xf8275a10), SN8(0xfe70747c), SN8(0x06a6d988) }
+};
diff --git a/libavcodec/sbcdec_data.h b/libavcodec/sbcdec_data.h
new file mode 100644
index 0000000000..1b79d1de23
--- /dev/null
+++ b/libavcodec/sbcdec_data.h
@@ -0,0 +1,44 @@
+/*
+ * Bluetooth low-complexity, subband codec (SBC)
+ *
+ * Copyright (C) 2017 Aurelien Jacobs <aurel at gnuage.org>
+ * Copyright (C) 2008-2010 Nokia Corporation
+ * Copyright (C) 2004-2010 Marcel Holtmann <marcel at holtmann.org>
+ * Copyright (C) 2004-2005 Henryk Ploetz <henryk at ploetzli.ch>
+ * Copyright (C) 2005-2006 Brad Midgley <bmidgley at xmission.com>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * SBC decoder tables
+ */
+
+#ifndef AVCODEC_SBCDEC_DATA_H
+#define AVCODEC_SBCDEC_DATA_H
+
+#include <stdint.h>
+
+extern const int32_t ff_sbc_proto_4_40m0[];
+extern const int32_t ff_sbc_proto_4_40m1[];
+extern const int32_t ff_sbc_proto_8_80m0[];
+extern const int32_t ff_sbc_proto_8_80m1[];
+extern const int32_t ff_synmatrix4[8][4];
+extern const int32_t ff_synmatrix8[16][8];
+
+#endif /* AVCODEC_SBCDEC_DATA_H */
--
2.15.1
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