* 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 {
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) {
- uint32_t shift =
- frame->scale_factor[ch][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);
+ audio_sample = 0;
+ for (bit = 0; bit < bits[ch][sb]; bit++) {
+ if (consumed > len * 8)
+ return -1;
- consumed++;
- }
+ if ((data[consumed >> 3] >> (7 - (consumed & 0x7))) & 0x01)
+ audio_sample |= 1 << (bits[ch][sb] - bit - 1);
- frame->sb_sample[blk][ch][sb] = (int32_t)
- (((((uint64_t) audio_sample << 1) | 1) << shift) /
- levels[ch][sb]) - (1 << shift);
- } else
- frame->sb_sample[blk][ch][sb] = 0;
+ consumed++;
+ }
+
+ frame->sb_sample[blk][ch][sb] = (int32_t)
+ (((((uint64_t) audio_sample << 1) | 1) << shift) /
+ levels[ch][sb]) - (1 << shift);
}
}
}
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;
}
}
-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) & ~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;
}
-ssize_t sbc_parse(sbc_t *sbc, const void *input, size_t 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);
}
-ssize_t sbc_decode(sbc_t *sbc, const void *input, size_t input_len,
+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;
return framelen;
}
-ssize_t sbc_encode(sbc_t *sbc, const void *input, size_t input_len,
+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;
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);
return samples * priv->frame.channels * 2;
}
-void sbc_finish(sbc_t *sbc)
+SBC_EXPORT void sbc_finish(sbc_t *sbc)
{
if (!sbc)
return;
memset(sbc, 0, sizeof(sbc_t));
}
-size_t 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, bitpool;
return priv->frame.length;
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;
joint = sbc->mode == SBC_MODE_JOINT_STEREO ? 1 : 0;
bitpool = sbc->bitpool;
return ret;
}
-unsigned 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;
}
-size_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;
}
-const char *sbc_get_implementation_info(sbc_t *sbc)
+SBC_EXPORT const char *sbc_get_implementation_info(sbc_t *sbc)
{
struct sbc_priv *priv;
return priv->enc_state.implementation_info;
}
-int sbc_reinit(sbc_t *sbc, unsigned long flags)
+SBC_EXPORT int sbc_reinit(sbc_t *sbc, unsigned long flags)
{
struct sbc_priv *priv;
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