*
* Bluetooth low-complexity, subband codec (SBC) library
*
- * Copyright (C) 2004-2009 Marcel Holtmann <marcel@holtmann.org>
+ * Copyright (C) 2008-2010 Nokia Corporation
+ * Copyright (C) 2004-2010 Marcel Holtmann <marcel@holtmann.org>
* Copyright (C) 2004-2005 Henryk Ploetz <henryk@ploetzli.ch>
* Copyright (C) 2005-2008 Brad Midgley <bmidgley@xmission.com>
+ * Copyright (C) 2012-2013 Intel Corporation
*
*
* This library is free software; you can redistribute it and/or
#include <errno.h>
#include <string.h>
#include <stdlib.h>
+#include <stdbool.h>
#include <sys/types.h>
#include <limits.h>
#include "sbc_tables.h"
#include "sbc.h"
+#include "sbc_private.h"
#include "sbc_primitives.h"
#define SBC_SYNCWORD 0x9C
+#define MSBC_SYNCWORD 0xAD
+#define MSBC_BLOCKS 15
+
/* This structure contains an unpacked SBC frame.
Yes, there is probably quite some unused space herein */
struct sbc_frame {
uint8_t joint;
/* only the lower 4 bits of every element are to be used */
- uint32_t scale_factor[2][8];
+ uint32_t SBC_ALIGNED scale_factor[2][8];
/* raw integer subband samples in the frame */
int32_t SBC_ALIGNED sb_sample_f[16][2][8];
* Takes a pointer to the frame in question, a pointer to the bits array and
* the sampling frequency (as 2 bit integer)
*/
-static void sbc_calculate_bits(const struct sbc_frame *frame, int (*bits)[8])
+static SBC_ALWAYS_INLINE void sbc_calculate_bits_internal(
+ const struct sbc_frame *frame, int (*bits)[8], int subbands)
{
uint8_t sf = frame->frequency;
for (ch = 0; ch < frame->channels; ch++) {
max_bitneed = 0;
if (frame->allocation == SNR) {
- for (sb = 0; sb < frame->subbands; sb++) {
+ 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 < frame->subbands; sb++) {
+ for (sb = 0; sb < subbands; sb++) {
if (frame->scale_factor[ch][sb] == 0)
bitneed[ch][sb] = -5;
else {
- if (frame->subbands == 4)
+ if (subbands == 4)
loudness = frame->scale_factor[ch][sb] - sbc_offset4[sf][sb];
else
loudness = frame->scale_factor[ch][sb] - sbc_offset8[sf][sb];
bitslice--;
bitcount += slicecount;
slicecount = 0;
- for (sb = 0; sb < frame->subbands; sb++) {
+ 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)
bitslice--;
}
- for (sb = 0; sb < frame->subbands; sb++) {
+ for (sb = 0; sb < subbands; sb++) {
if (bitneed[ch][sb] < bitslice + 2)
bits[ch][sb] = 0;
else {
}
}
- for (sb = 0; bitcount < frame->bitpool && sb < frame->subbands; sb++) {
+ for (sb = 0; bitcount < frame->bitpool &&
+ sb < subbands; sb++) {
if ((bits[ch][sb] >= 2) && (bits[ch][sb] < 16)) {
bits[ch][sb]++;
bitcount++;
}
}
- for (sb = 0; bitcount < frame->bitpool && sb < frame->subbands; sb++) {
+ for (sb = 0; bitcount < frame->bitpool &&
+ sb < subbands; sb++) {
if (bits[ch][sb] < 16) {
bits[ch][sb]++;
bitcount++;
max_bitneed = 0;
if (frame->allocation == SNR) {
for (ch = 0; ch < 2; ch++) {
- for (sb = 0; sb < frame->subbands; sb++) {
+ 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 < frame->subbands; sb++) {
+ for (sb = 0; sb < subbands; sb++) {
if (frame->scale_factor[ch][sb] == 0)
bitneed[ch][sb] = -5;
else {
- if (frame->subbands == 4)
+ if (subbands == 4)
loudness = frame->scale_factor[ch][sb] - sbc_offset4[sf][sb];
else
loudness = frame->scale_factor[ch][sb] - sbc_offset8[sf][sb];
bitcount += slicecount;
slicecount = 0;
for (ch = 0; ch < 2; ch++) {
- for (sb = 0; sb < frame->subbands; sb++) {
+ 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)
}
for (ch = 0; ch < 2; ch++) {
- for (sb = 0; sb < frame->subbands; sb++) {
+ for (sb = 0; sb < subbands; sb++) {
if (bitneed[ch][sb] < bitslice + 2) {
bits[ch][sb] = 0;
} else {
if (ch == 1) {
ch = 0;
sb++;
- if (sb >= frame->subbands) break;
+ if (sb >= subbands)
+ break;
} else
ch = 1;
}
if (ch == 1) {
ch = 0;
sb++;
- if (sb >= frame->subbands) break;
+ if (sb >= subbands)
+ break;
} else
ch = 1;
}
}
+static void 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);
+}
+
/*
* Unpacks a SBC frame at the beginning of the stream in data,
* which has at most len bytes into frame.
* -4 Bitpool value out of bounds
*/
static int sbc_unpack_frame(const uint8_t *data, struct sbc_frame *frame,
- size_t len)
+ size_t len)
{
unsigned int consumed;
/* Will copy the parts of the header that are relevant to crc
int crc_pos = 0;
int32_t temp;
- int audio_sample;
+ uint32_t audio_sample;
int ch, sb, blk, bit; /* channel, subband, block and bit standard
counters */
int bits[2][8]; /* bits distribution */
for (blk = 0; blk < frame->blocks; blk++) {
for (ch = 0; ch < frame->channels; ch++) {
for (sb = 0; sb < frame->subbands; sb++) {
- if (levels[ch][sb] > 0) {
- audio_sample = 0;
- for (bit = 0; bit < bits[ch][sb]; bit++) {
- if (consumed > len * 8)
- return -1;
+ uint32_t shift;
- if ((data[consumed >> 3] >> (7 - (consumed & 0x7))) & 0x01)
- audio_sample |= 1 << (bits[ch][sb] - bit - 1);
+ if (levels[ch][sb] == 0) {
+ frame->sb_sample[blk][ch][sb] = 0;
+ continue;
+ }
- consumed++;
- }
+ shift = frame->scale_factor[ch][sb] +
+ 1 + SBCDEC_FIXED_EXTRA_BITS;
- frame->sb_sample[blk][ch][sb] =
- (((audio_sample << 1) | 1) << frame->scale_factor[ch][sb]) /
- levels[ch][sb] - (1 << frame->scale_factor[ch][sb]);
- } else
- frame->sb_sample[blk][ch][sb] = 0;
+ 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);
}
}
}
}
static void sbc_decoder_init(struct sbc_decoder_state *state,
- const struct sbc_frame *frame)
+ const struct sbc_frame *frame)
{
int i, ch;
state->offset[ch][i] = (10 * i + 10);
}
+static SBC_ALWAYS_INLINE int16_t sbc_clip16(int32_t s)
+{
+ if (s > 0x7FFF)
+ return 0x7FFF;
+ else if (s < -0x8000)
+ return -0x8000;
+ else
+ return s;
+}
+
static inline void sbc_synthesize_four(struct sbc_decoder_state *state,
struct sbc_frame *frame, int ch, int blk)
{
k = (i + 4) & 0xf;
/* Store in output, Q0 */
- frame->pcm_sample[ch][blk * 4 + i] = SCALE4_STAGED1(
+ frame->pcm_sample[ch][blk * 4 + i] = sbc_clip16(SCALE4_STAGED1(
MULA(v[offset[i] + 0], sbc_proto_4_40m0[idx + 0],
MULA(v[offset[k] + 1], sbc_proto_4_40m1[idx + 0],
MULA(v[offset[i] + 2], sbc_proto_4_40m0[idx + 1],
MULA(v[offset[i] + 6], sbc_proto_4_40m0[idx + 3],
MULA(v[offset[k] + 7], sbc_proto_4_40m1[idx + 3],
MULA(v[offset[i] + 8], sbc_proto_4_40m0[idx + 4],
- MUL( v[offset[k] + 9], sbc_proto_4_40m1[idx + 4])))))))))));
+ MUL( v[offset[k] + 9], sbc_proto_4_40m1[idx + 4]))))))))))));
}
}
for (idx = 0, i = 0; i < 8; i++, idx += 5) {
k = (i + 8) & 0xf;
- /* Store in output */
- frame->pcm_sample[ch][blk * 8 + i] = SCALE8_STAGED1( // Q0
+ /* Store in output, Q0 */
+ frame->pcm_sample[ch][blk * 8 + i] = sbc_clip16(SCALE8_STAGED1(
MULA(state->V[ch][offset[i] + 0], sbc_proto_8_80m0[idx + 0],
MULA(state->V[ch][offset[k] + 1], sbc_proto_8_80m1[idx + 0],
MULA(state->V[ch][offset[i] + 2], sbc_proto_8_80m0[idx + 1],
MULA(state->V[ch][offset[i] + 6], sbc_proto_8_80m0[idx + 3],
MULA(state->V[ch][offset[k] + 7], sbc_proto_8_80m1[idx + 3],
MULA(state->V[ch][offset[i] + 8], sbc_proto_8_80m0[idx + 4],
- MUL( state->V[ch][offset[k] + 9], sbc_proto_8_80m1[idx + 4])))))))))));
+ MUL( state->V[ch][offset[k] + 9], sbc_proto_8_80m1[idx + 4]))))))))))));
}
}
static int sbc_synthesize_audio(struct sbc_decoder_state *state,
- struct sbc_frame *frame)
+ struct sbc_frame *frame)
{
int ch, blk;
}
static int sbc_analyze_audio(struct sbc_encoder_state *state,
- struct sbc_frame *frame)
+ struct sbc_frame *frame)
{
int ch, blk;
int16_t *x;
switch (frame->subbands) {
case 4:
for (ch = 0; ch < frame->channels; ch++) {
- x = &state->X[ch][state->position - 16 +
- frame->blocks * 4];
- for (blk = 0; blk < frame->blocks; blk += 4) {
- state->sbc_analyze_4b_4s(
- x,
+ x = &state->X[ch][state->position - 4 *
+ state->increment + frame->blocks * 4];
+ for (blk = 0; blk < frame->blocks;
+ blk += state->increment) {
+ state->sbc_analyze_4s(
+ state, x,
frame->sb_sample_f[blk][ch],
frame->sb_sample_f[blk + 1][ch] -
frame->sb_sample_f[blk][ch]);
- x -= 16;
+ x -= 4 * state->increment;
}
}
return frame->blocks * 4;
case 8:
for (ch = 0; ch < frame->channels; ch++) {
- x = &state->X[ch][state->position - 32 +
- frame->blocks * 8];
- for (blk = 0; blk < frame->blocks; blk += 4) {
- state->sbc_analyze_4b_8s(
- x,
+ x = &state->X[ch][state->position - 8 *
+ state->increment + frame->blocks * 8];
+ for (blk = 0; blk < frame->blocks;
+ blk += state->increment) {
+ state->sbc_analyze_8s(
+ state, x,
frame->sb_sample_f[blk][ch],
frame->sb_sample_f[blk + 1][ch] -
frame->sb_sample_f[blk][ch]);
- x -= 32;
+ x -= 8 * state->increment;
}
}
return frame->blocks * 8;
* -99 not implemented
*/
-static SBC_ALWAYS_INLINE int sbc_pack_frame_internal(
- uint8_t *data, struct sbc_frame *frame, size_t len,
- int frame_subbands, int frame_channels)
+static SBC_ALWAYS_INLINE ssize_t sbc_pack_frame_internal(uint8_t *data,
+ struct sbc_frame *frame, size_t len,
+ int frame_subbands, int frame_channels,
+ int joint)
{
/* Bitstream writer starts from the fourth byte */
uint8_t *data_ptr = data + 4;
crc_pos = 16;
if (frame->mode == JOINT_STEREO) {
- /* like frame->sb_sample but joint stereo */
- int32_t sb_sample_j[16][2];
- /* scalefactor and scale_factor in joint case */
- uint32_t scalefactor_j[2];
- uint8_t scale_factor_j[2];
-
- uint8_t joint = 0;
- frame->joint = 0;
-
- for (sb = 0; sb < frame_subbands - 1; sb++) {
- scale_factor_j[0] = 0;
- scalefactor_j[0] = 2 << SCALE_OUT_BITS;
- scale_factor_j[1] = 0;
- scalefactor_j[1] = 2 << SCALE_OUT_BITS;
-
- for (blk = 0; blk < frame->blocks; blk++) {
- uint32_t tmp;
- /* Calculate joint stereo signal */
- sb_sample_j[blk][0] =
- ASR(frame->sb_sample_f[blk][0][sb], 1) +
- ASR(frame->sb_sample_f[blk][1][sb], 1);
- sb_sample_j[blk][1] =
- ASR(frame->sb_sample_f[blk][0][sb], 1) -
- ASR(frame->sb_sample_f[blk][1][sb], 1);
-
- /* calculate scale_factor_j and scalefactor_j for joint case */
- tmp = fabs(sb_sample_j[blk][0]);
- while (scalefactor_j[0] < tmp) {
- scale_factor_j[0]++;
- scalefactor_j[0] *= 2;
- }
- tmp = fabs(sb_sample_j[blk][1]);
- while (scalefactor_j[1] < tmp) {
- scale_factor_j[1]++;
- scalefactor_j[1] *= 2;
- }
- }
-
- /* decide whether to join this subband */
- if ((frame->scale_factor[0][sb] +
- frame->scale_factor[1][sb]) >
- (scale_factor_j[0] +
- scale_factor_j[1])) {
- /* use joint stereo for this subband */
- joint |= 1 << (frame_subbands - 1 - sb);
- frame->joint |= 1 << sb;
- frame->scale_factor[0][sb] = scale_factor_j[0];
- frame->scale_factor[1][sb] = scale_factor_j[1];
- for (blk = 0; blk < frame->blocks; blk++) {
- frame->sb_sample_f[blk][0][sb] =
- sb_sample_j[blk][0];
- frame->sb_sample_f[blk][1][sb] =
- sb_sample_j[blk][1];
- }
- }
- }
-
PUT_BITS(data_ptr, bits_cache, bits_count,
joint, frame_subbands);
crc_header[crc_pos >> 3] = joint;
return data_ptr - data;
}
-static int sbc_pack_frame(uint8_t *data, struct sbc_frame *frame, size_t len)
+static ssize_t sbc_pack_frame(uint8_t *data, struct sbc_frame *frame, size_t len,
+ int joint)
{
if (frame->subbands == 4) {
if (frame->channels == 1)
- return sbc_pack_frame_internal(data, frame, len, 4, 1);
+ return sbc_pack_frame_internal(
+ data, frame, len, 4, 1, joint);
else
- return sbc_pack_frame_internal(data, frame, len, 4, 2);
+ return sbc_pack_frame_internal(
+ data, frame, len, 4, 2, joint);
} else {
if (frame->channels == 1)
- return sbc_pack_frame_internal(data, frame, len, 8, 1);
+ return sbc_pack_frame_internal(
+ data, frame, len, 8, 1, joint);
else
- return sbc_pack_frame_internal(data, frame, len, 8, 2);
+ return sbc_pack_frame_internal(
+ data, frame, len, 8, 2, joint);
}
}
-static void sbc_encoder_init(struct sbc_encoder_state *state,
- const struct sbc_frame *frame)
+static void sbc_encoder_init(bool msbc, struct sbc_encoder_state *state,
+ const struct sbc_frame *frame)
{
memset(&state->X, 0, sizeof(state->X));
- state->position = SBC_X_BUFFER_SIZE - frame->subbands * 9;
+ state->position = (SBC_X_BUFFER_SIZE - frame->subbands * 9) & ~7;
+ if (msbc)
+ state->increment = 1;
+ else
+ state->increment = 4;
sbc_init_primitives(state);
}
struct sbc_priv {
int init;
+ bool msbc;
struct SBC_ALIGNED sbc_frame frame;
struct SBC_ALIGNED sbc_decoder_state dec_state;
struct SBC_ALIGNED sbc_encoder_state enc_state;
static void sbc_set_defaults(sbc_t *sbc, unsigned long flags)
{
+ sbc->flags = flags;
sbc->frequency = SBC_FREQ_44100;
sbc->mode = SBC_MODE_STEREO;
sbc->subbands = SBC_SB_8;
#endif
}
-int sbc_init(sbc_t *sbc, unsigned long flags)
+SBC_EXPORT int sbc_init(sbc_t *sbc, unsigned long flags)
{
if (!sbc)
return -EIO;
return 0;
}
-int sbc_parse(sbc_t *sbc, void *input, int input_len)
+SBC_EXPORT int sbc_init_msbc(sbc_t *sbc, unsigned long flags)
+{
+ struct sbc_priv *priv;
+
+ if (!sbc)
+ return -EIO;
+
+ memset(sbc, 0, sizeof(sbc_t));
+
+ sbc->priv_alloc_base = malloc(sizeof(struct sbc_priv) + SBC_ALIGN_MASK);
+ if (!sbc->priv_alloc_base)
+ return -ENOMEM;
+
+ sbc->priv = (void *) (((uintptr_t) sbc->priv_alloc_base +
+ SBC_ALIGN_MASK) & ~((uintptr_t) SBC_ALIGN_MASK));
+
+ memset(sbc->priv, 0, sizeof(struct sbc_priv));
+
+ priv = sbc->priv;
+ priv->msbc = true;
+
+ sbc_set_defaults(sbc, flags);
+
+ sbc->frequency = SBC_FREQ_16000;
+ sbc->blocks = MSBC_BLOCKS;
+ sbc->subbands = SBC_SB_8;
+ sbc->mode = SBC_MODE_MONO;
+ sbc->allocation = SBC_AM_LOUDNESS;
+ sbc->bitpool = 26;
+
+ return 0;
+}
+
+SBC_EXPORT ssize_t sbc_parse(sbc_t *sbc, const void *input, size_t input_len)
{
return sbc_decode(sbc, input, input_len, NULL, 0, NULL);
}
-int sbc_decode(sbc_t *sbc, void *input, int input_len, void *output,
- int output_len, int *written)
+SBC_EXPORT ssize_t sbc_decode(sbc_t *sbc, const void *input, size_t input_len,
+ void *output, size_t output_len, size_t *written)
{
struct sbc_priv *priv;
char *ptr;
int i, ch, framelen, samples;
- if (!sbc && !input)
+ if (!sbc || !input)
return -EIO;
priv = sbc->priv;
sbc->bitpool = priv->frame.bitpool;
priv->frame.codesize = sbc_get_codesize(sbc);
- priv->frame.length = sbc_get_frame_length(sbc);
+ priv->frame.length = framelen;
+ } else if (priv->frame.bitpool != sbc->bitpool) {
+ priv->frame.length = framelen;
+ sbc->bitpool = priv->frame.bitpool;
}
if (!output)
ptr = output;
- if (output_len < samples * priv->frame.channels * 2)
+ if (output_len < (size_t) (samples * priv->frame.channels * 2))
samples = output_len / (priv->frame.channels * 2);
for (i = 0; i < samples; i++) {
return framelen;
}
-int sbc_encode(sbc_t *sbc, void *input, int input_len, void *output,
- int output_len, int *written)
+SBC_EXPORT ssize_t sbc_encode(sbc_t *sbc, const void *input, size_t input_len,
+ void *output, size_t output_len, ssize_t *written)
{
struct sbc_priv *priv;
- int framelen, samples;
+ int samples;
+ ssize_t framelen;
int (*sbc_enc_process_input)(int position,
const uint8_t *pcm, int16_t X[2][SBC_X_BUFFER_SIZE],
int nsamples, int nchannels);
- if (!sbc && !input)
+ if (!sbc || !input)
return -EIO;
priv = sbc->priv;
priv->frame.subband_mode = sbc->subbands;
priv->frame.subbands = sbc->subbands ? 8 : 4;
priv->frame.block_mode = sbc->blocks;
- priv->frame.blocks = 4 + (sbc->blocks * 4);
+ if (priv->msbc)
+ priv->frame.blocks = MSBC_BLOCKS;
+ else
+ priv->frame.blocks = 4 + (sbc->blocks * 4);
priv->frame.bitpool = sbc->bitpool;
priv->frame.codesize = sbc_get_codesize(sbc);
priv->frame.length = sbc_get_frame_length(sbc);
- sbc_encoder_init(&priv->enc_state, &priv->frame);
+ sbc_encoder_init(priv->msbc, &priv->enc_state, &priv->frame);
priv->init = 1;
+ } else if (priv->frame.bitpool != sbc->bitpool) {
+ priv->frame.length = sbc_get_frame_length(sbc);
+ priv->frame.bitpool = sbc->bitpool;
}
/* input must be large enough to encode a complete frame */
samples = sbc_analyze_audio(&priv->enc_state, &priv->frame);
- priv->enc_state.sbc_calc_scalefactors(
- priv->frame.sb_sample_f, priv->frame.scale_factor,
- priv->frame.blocks, priv->frame.channels, priv->frame.subbands);
-
- framelen = sbc_pack_frame(output, &priv->frame, output_len);
+ if (priv->frame.mode == JOINT_STEREO) {
+ int j = priv->enc_state.sbc_calc_scalefactors_j(
+ priv->frame.sb_sample_f, priv->frame.scale_factor,
+ priv->frame.blocks, priv->frame.subbands);
+ framelen = sbc_pack_frame(output, &priv->frame, output_len, j);
+ } else {
+ priv->enc_state.sbc_calc_scalefactors(
+ priv->frame.sb_sample_f, priv->frame.scale_factor,
+ priv->frame.blocks, priv->frame.channels,
+ priv->frame.subbands);
+ framelen = sbc_pack_frame(output, &priv->frame, output_len, 0);
+ }
if (written)
*written = framelen;
return samples * priv->frame.channels * 2;
}
-void sbc_finish(sbc_t *sbc)
+SBC_EXPORT void sbc_finish(sbc_t *sbc)
{
if (!sbc)
return;
- if (sbc->priv_alloc_base)
- free(sbc->priv_alloc_base);
+ free(sbc->priv_alloc_base);
memset(sbc, 0, sizeof(sbc_t));
}
-int sbc_get_frame_length(sbc_t *sbc)
+SBC_EXPORT size_t sbc_get_frame_length(sbc_t *sbc)
{
int ret;
- uint8_t subbands, channels, blocks, joint;
+ uint8_t subbands, channels, blocks, joint, bitpool;
struct sbc_priv *priv;
priv = sbc->priv;
- if (!priv->init) {
- subbands = sbc->subbands ? 8 : 4;
+ if (priv->init && priv->frame.bitpool == sbc->bitpool)
+ return priv->frame.length;
+
+ subbands = sbc->subbands ? 8 : 4;
+ if (priv->msbc)
+ blocks = MSBC_BLOCKS;
+ else
blocks = 4 + (sbc->blocks * 4);
- channels = sbc->mode == SBC_MODE_MONO ? 1 : 2;
- joint = sbc->mode == SBC_MODE_JOINT_STEREO ? 1 : 0;
- } else {
- subbands = priv->frame.subbands;
- blocks = priv->frame.blocks;
- channels = priv->frame.channels;
- joint = priv->frame.joint;
- }
+ channels = sbc->mode == SBC_MODE_MONO ? 1 : 2;
+ joint = sbc->mode == SBC_MODE_JOINT_STEREO ? 1 : 0;
+ bitpool = sbc->bitpool;
ret = 4 + (4 * subbands * channels) / 8;
-
/* This term is not always evenly divide so we round it up */
if (channels == 1)
- ret += ((blocks * channels * sbc->bitpool) + 7) / 8;
+ ret += ((blocks * channels * bitpool) + 7) / 8;
else
- ret += (((joint ? subbands : 0) + blocks * sbc->bitpool) + 7)
- / 8;
+ ret += (((joint ? subbands : 0) + blocks * bitpool) + 7) / 8;
return ret;
}
-int sbc_get_frame_duration(sbc_t *sbc)
+SBC_EXPORT unsigned sbc_get_frame_duration(sbc_t *sbc)
{
uint8_t subbands, blocks;
uint16_t frequency;
priv = sbc->priv;
if (!priv->init) {
subbands = sbc->subbands ? 8 : 4;
- blocks = 4 + (sbc->blocks * 4);
+ if (priv->msbc)
+ blocks = MSBC_BLOCKS;
+ else
+ blocks = 4 + (sbc->blocks * 4);
} else {
subbands = priv->frame.subbands;
blocks = priv->frame.blocks;
return (1000000 * blocks * subbands) / frequency;
}
-uint16_t sbc_get_codesize(sbc_t *sbc)
+SBC_EXPORT size_t sbc_get_codesize(sbc_t *sbc)
{
uint16_t subbands, channels, blocks;
struct sbc_priv *priv;
priv = sbc->priv;
if (!priv->init) {
subbands = sbc->subbands ? 8 : 4;
- blocks = 4 + (sbc->blocks * 4);
+ if (priv->msbc)
+ blocks = MSBC_BLOCKS;
+ else
+ blocks = 4 + (sbc->blocks * 4);
channels = sbc->mode == SBC_MODE_MONO ? 1 : 2;
} else {
subbands = priv->frame.subbands;
return subbands * blocks * channels * 2;
}
-int sbc_reinit(sbc_t *sbc, unsigned long flags)
+SBC_EXPORT const char *sbc_get_implementation_info(sbc_t *sbc)
+{
+ struct sbc_priv *priv;
+
+ if (!sbc)
+ return NULL;
+
+ priv = sbc->priv;
+ if (!priv)
+ return NULL;
+
+ return priv->enc_state.implementation_info;
+}
+
+SBC_EXPORT int sbc_reinit(sbc_t *sbc, unsigned long flags)
{
struct sbc_priv *priv;
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