summaryrefslogtreecommitdiffstats
path: root/third_party/libwebrtc/modules/audio_coding/codecs/ilbc/pack_bits.c
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--third_party/libwebrtc/modules/audio_coding/codecs/ilbc/pack_bits.c253
1 files changed, 253 insertions, 0 deletions
diff --git a/third_party/libwebrtc/modules/audio_coding/codecs/ilbc/pack_bits.c b/third_party/libwebrtc/modules/audio_coding/codecs/ilbc/pack_bits.c
new file mode 100644
index 0000000000..dd44eb8fb6
--- /dev/null
+++ b/third_party/libwebrtc/modules/audio_coding/codecs/ilbc/pack_bits.c
@@ -0,0 +1,253 @@
+/*
+ * Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+/******************************************************************
+
+ iLBC Speech Coder ANSI-C Source Code
+
+ WebRtcIlbcfix_PackBits.c
+
+******************************************************************/
+
+#include "modules/audio_coding/codecs/ilbc/pack_bits.h"
+
+#include "modules/audio_coding/codecs/ilbc/defines.h"
+
+/*----------------------------------------------------------------*
+ * unpacking of bits from bitstream, i.e., vector of bytes
+ *---------------------------------------------------------------*/
+
+void WebRtcIlbcfix_PackBits(
+ uint16_t *bitstream, /* (o) The packetized bitstream */
+ iLBC_bits *enc_bits, /* (i) Encoded bits */
+ int16_t mode /* (i) Codec mode (20 or 30) */
+ ){
+ uint16_t *bitstreamPtr;
+ int i, k;
+ int16_t *tmpPtr;
+
+ bitstreamPtr=bitstream;
+
+ /* Class 1 bits of ULP */
+ /* First int16_t */
+ (*bitstreamPtr) = ((uint16_t)enc_bits->lsf[0])<<10; /* Bit 0..5 */
+ (*bitstreamPtr) |= (enc_bits->lsf[1])<<3; /* Bit 6..12 */
+ (*bitstreamPtr) |= (enc_bits->lsf[2]&0x70)>>4; /* Bit 13..15 */
+ bitstreamPtr++;
+ /* Second int16_t */
+ (*bitstreamPtr) = ((uint16_t)enc_bits->lsf[2]&0xF)<<12; /* Bit 0..3 */
+
+ if (mode==20) {
+ (*bitstreamPtr) |= (enc_bits->startIdx)<<10; /* Bit 4..5 */
+ (*bitstreamPtr) |= (enc_bits->state_first)<<9; /* Bit 6 */
+ (*bitstreamPtr) |= (enc_bits->idxForMax)<<3; /* Bit 7..12 */
+ (*bitstreamPtr) |= ((enc_bits->cb_index[0])&0x70)>>4; /* Bit 13..15 */
+ bitstreamPtr++;
+ /* Third int16_t */
+ (*bitstreamPtr) = ((enc_bits->cb_index[0])&0xE)<<12; /* Bit 0..2 */
+ (*bitstreamPtr) |= ((enc_bits->gain_index[0])&0x18)<<8; /* Bit 3..4 */
+ (*bitstreamPtr) |= ((enc_bits->gain_index[1])&0x8)<<7; /* Bit 5 */
+ (*bitstreamPtr) |= ((enc_bits->cb_index[3])&0xFE)<<2; /* Bit 6..12 */
+ (*bitstreamPtr) |= ((enc_bits->gain_index[3])&0x10)>>2; /* Bit 13 */
+ (*bitstreamPtr) |= ((enc_bits->gain_index[4])&0x8)>>2; /* Bit 14 */
+ (*bitstreamPtr) |= ((enc_bits->gain_index[6])&0x10)>>4; /* Bit 15 */
+ } else { /* mode==30 */
+ (*bitstreamPtr) |= (enc_bits->lsf[3])<<6; /* Bit 4..9 */
+ (*bitstreamPtr) |= (enc_bits->lsf[4]&0x7E)>>1; /* Bit 10..15 */
+ bitstreamPtr++;
+ /* Third int16_t */
+ (*bitstreamPtr) = ((uint16_t)enc_bits->lsf[4]&0x1)<<15; /* Bit 0 */
+ (*bitstreamPtr) |= (enc_bits->lsf[5])<<8; /* Bit 1..7 */
+ (*bitstreamPtr) |= (enc_bits->startIdx)<<5; /* Bit 8..10 */
+ (*bitstreamPtr) |= (enc_bits->state_first)<<4; /* Bit 11 */
+ (*bitstreamPtr) |= ((enc_bits->idxForMax)&0x3C)>>2; /* Bit 12..15 */
+ bitstreamPtr++;
+ /* 4:th int16_t */
+ (*bitstreamPtr) = ((uint16_t)enc_bits->idxForMax&0x3)<<14; /* Bit 0..1 */
+ (*bitstreamPtr) |= (enc_bits->cb_index[0]&0x78)<<7; /* Bit 2..5 */
+ (*bitstreamPtr) |= (enc_bits->gain_index[0]&0x10)<<5; /* Bit 6 */
+ (*bitstreamPtr) |= (enc_bits->gain_index[1]&0x8)<<5; /* Bit 7 */
+ (*bitstreamPtr) |= (enc_bits->cb_index[3]&0xFC); /* Bit 8..13 */
+ (*bitstreamPtr) |= (enc_bits->gain_index[3]&0x10)>>3; /* Bit 14 */
+ (*bitstreamPtr) |= (enc_bits->gain_index[4]&0x8)>>3; /* Bit 15 */
+ }
+ /* Class 2 bits of ULP */
+ /* 4:th to 6:th int16_t for 20 ms case
+ 5:th to 7:th int16_t for 30 ms case */
+ bitstreamPtr++;
+ tmpPtr=enc_bits->idxVec;
+ for (k=0; k<3; k++) {
+ (*bitstreamPtr) = 0;
+ for (i=15; i>=0; i--) {
+ (*bitstreamPtr) |= ((uint16_t)((*tmpPtr)&0x4)>>2)<<i;
+ /* Bit 15-i */
+ tmpPtr++;
+ }
+ bitstreamPtr++;
+ }
+
+ if (mode==20) {
+ /* 7:th int16_t */
+ (*bitstreamPtr) = 0;
+ for (i=15; i>6; i--) {
+ (*bitstreamPtr) |= ((uint16_t)((*tmpPtr)&0x4)>>2)<<i;
+ /* Bit 15-i */
+ tmpPtr++;
+ }
+ (*bitstreamPtr) |= (enc_bits->gain_index[1]&0x4)<<4; /* Bit 9 */
+ (*bitstreamPtr) |= (enc_bits->gain_index[3]&0xC)<<2; /* Bit 10..11 */
+ (*bitstreamPtr) |= (enc_bits->gain_index[4]&0x4)<<1; /* Bit 12 */
+ (*bitstreamPtr) |= (enc_bits->gain_index[6]&0x8)>>1; /* Bit 13 */
+ (*bitstreamPtr) |= (enc_bits->gain_index[7]&0xC)>>2; /* Bit 14..15 */
+
+ } else { /* mode==30 */
+ /* 8:th int16_t */
+ (*bitstreamPtr) = 0;
+ for (i=15; i>5; i--) {
+ (*bitstreamPtr) |= ((uint16_t)((*tmpPtr)&0x4)>>2)<<i;
+ /* Bit 15-i */
+ tmpPtr++;
+ }
+ (*bitstreamPtr) |= (enc_bits->cb_index[0]&0x6)<<3; /* Bit 10..11 */
+ (*bitstreamPtr) |= (enc_bits->gain_index[0]&0x8); /* Bit 12 */
+ (*bitstreamPtr) |= (enc_bits->gain_index[1]&0x4); /* Bit 13 */
+ (*bitstreamPtr) |= (enc_bits->cb_index[3]&0x2); /* Bit 14 */
+ (*bitstreamPtr) |= (enc_bits->cb_index[6]&0x80)>>7; /* Bit 15 */
+ bitstreamPtr++;
+ /* 9:th int16_t */
+ (*bitstreamPtr) = ((uint16_t)enc_bits->cb_index[6]&0x7E)<<9;/* Bit 0..5 */
+ (*bitstreamPtr) |= (enc_bits->cb_index[9]&0xFE)<<2; /* Bit 6..12 */
+ (*bitstreamPtr) |= (enc_bits->cb_index[12]&0xE0)>>5; /* Bit 13..15 */
+ bitstreamPtr++;
+ /* 10:th int16_t */
+ (*bitstreamPtr) = ((uint16_t)enc_bits->cb_index[12]&0x1E)<<11;/* Bit 0..3 */
+ (*bitstreamPtr) |= (enc_bits->gain_index[3]&0xC)<<8; /* Bit 4..5 */
+ (*bitstreamPtr) |= (enc_bits->gain_index[4]&0x6)<<7; /* Bit 6..7 */
+ (*bitstreamPtr) |= (enc_bits->gain_index[6]&0x18)<<3; /* Bit 8..9 */
+ (*bitstreamPtr) |= (enc_bits->gain_index[7]&0xC)<<2; /* Bit 10..11 */
+ (*bitstreamPtr) |= (enc_bits->gain_index[9]&0x10)>>1; /* Bit 12 */
+ (*bitstreamPtr) |= (enc_bits->gain_index[10]&0x8)>>1; /* Bit 13 */
+ (*bitstreamPtr) |= (enc_bits->gain_index[12]&0x10)>>3; /* Bit 14 */
+ (*bitstreamPtr) |= (enc_bits->gain_index[13]&0x8)>>3; /* Bit 15 */
+ }
+ bitstreamPtr++;
+ /* Class 3 bits of ULP */
+ /* 8:th to 14:th int16_t for 20 ms case
+ 11:th to 17:th int16_t for 30 ms case */
+ tmpPtr=enc_bits->idxVec;
+ for (k=0; k<7; k++) {
+ (*bitstreamPtr) = 0;
+ for (i=14; i>=0; i-=2) {
+ (*bitstreamPtr) |= ((uint16_t)((*tmpPtr)&0x3))<<i; /* Bit 15-i..14-i*/
+ tmpPtr++;
+ }
+ bitstreamPtr++;
+ }
+
+ if (mode==20) {
+ /* 15:th int16_t */
+ (*bitstreamPtr) = ((uint16_t)((enc_bits->idxVec[56])&0x3))<<14;/* Bit 0..1 */
+ (*bitstreamPtr) |= (((enc_bits->cb_index[0])&1))<<13; /* Bit 2 */
+ (*bitstreamPtr) |= ((enc_bits->cb_index[1]))<<6; /* Bit 3..9 */
+ (*bitstreamPtr) |= ((enc_bits->cb_index[2])&0x7E)>>1; /* Bit 10..15 */
+ bitstreamPtr++;
+ /* 16:th int16_t */
+ (*bitstreamPtr) = ((uint16_t)((enc_bits->cb_index[2])&0x1))<<15;
+ /* Bit 0 */
+ (*bitstreamPtr) |= ((enc_bits->gain_index[0])&0x7)<<12; /* Bit 1..3 */
+ (*bitstreamPtr) |= ((enc_bits->gain_index[1])&0x3)<<10; /* Bit 4..5 */
+ (*bitstreamPtr) |= ((enc_bits->gain_index[2]))<<7; /* Bit 6..8 */
+ (*bitstreamPtr) |= ((enc_bits->cb_index[3])&0x1)<<6; /* Bit 9 */
+ (*bitstreamPtr) |= ((enc_bits->cb_index[4])&0x7E)>>1; /* Bit 10..15 */
+ bitstreamPtr++;
+ /* 17:th int16_t */
+ (*bitstreamPtr) = ((uint16_t)((enc_bits->cb_index[4])&0x1))<<15;
+ /* Bit 0 */
+ (*bitstreamPtr) |= (enc_bits->cb_index[5])<<8; /* Bit 1..7 */
+ (*bitstreamPtr) |= (enc_bits->cb_index[6]); /* Bit 8..15 */
+ bitstreamPtr++;
+ /* 18:th int16_t */
+ (*bitstreamPtr) = ((uint16_t)(enc_bits->cb_index[7]))<<8; /* Bit 0..7 */
+ (*bitstreamPtr) |= (enc_bits->cb_index[8]); /* Bit 8..15 */
+ bitstreamPtr++;
+ /* 19:th int16_t */
+ (*bitstreamPtr) = ((uint16_t)((enc_bits->gain_index[3])&0x3))<<14;
+ /* Bit 0..1 */
+ (*bitstreamPtr) |= ((enc_bits->gain_index[4])&0x3)<<12; /* Bit 2..3 */
+ (*bitstreamPtr) |= ((enc_bits->gain_index[5]))<<9; /* Bit 4..6 */
+ (*bitstreamPtr) |= ((enc_bits->gain_index[6])&0x7)<<6; /* Bit 7..9 */
+ (*bitstreamPtr) |= ((enc_bits->gain_index[7])&0x3)<<4; /* Bit 10..11 */
+ (*bitstreamPtr) |= (enc_bits->gain_index[8])<<1; /* Bit 12..14 */
+ } else { /* mode==30 */
+ /* 18:th int16_t */
+ (*bitstreamPtr) = ((uint16_t)((enc_bits->idxVec[56])&0x3))<<14;/* Bit 0..1 */
+ (*bitstreamPtr) |= (((enc_bits->idxVec[57])&0x3))<<12; /* Bit 2..3 */
+ (*bitstreamPtr) |= (((enc_bits->cb_index[0])&1))<<11; /* Bit 4 */
+ (*bitstreamPtr) |= ((enc_bits->cb_index[1]))<<4; /* Bit 5..11 */
+ (*bitstreamPtr) |= ((enc_bits->cb_index[2])&0x78)>>3; /* Bit 12..15 */
+ bitstreamPtr++;
+ /* 19:th int16_t */
+ (*bitstreamPtr) = ((uint16_t)(enc_bits->cb_index[2])&0x7)<<13;
+ /* Bit 0..2 */
+ (*bitstreamPtr) |= ((enc_bits->gain_index[0])&0x7)<<10; /* Bit 3..5 */
+ (*bitstreamPtr) |= ((enc_bits->gain_index[1])&0x3)<<8; /* Bit 6..7 */
+ (*bitstreamPtr) |= ((enc_bits->gain_index[2])&0x7)<<5; /* Bit 8..10 */
+ (*bitstreamPtr) |= ((enc_bits->cb_index[3])&0x1)<<4; /* Bit 11 */
+ (*bitstreamPtr) |= ((enc_bits->cb_index[4])&0x78)>>3; /* Bit 12..15 */
+ bitstreamPtr++;
+ /* 20:th int16_t */
+ (*bitstreamPtr) = ((uint16_t)(enc_bits->cb_index[4])&0x7)<<13;
+ /* Bit 0..2 */
+ (*bitstreamPtr) |= ((enc_bits->cb_index[5]))<<6; /* Bit 3..9 */
+ (*bitstreamPtr) |= ((enc_bits->cb_index[6])&0x1)<<5; /* Bit 10 */
+ (*bitstreamPtr) |= ((enc_bits->cb_index[7])&0xF8)>>3; /* Bit 11..15 */
+ bitstreamPtr++;
+ /* 21:st int16_t */
+ (*bitstreamPtr) = ((uint16_t)(enc_bits->cb_index[7])&0x7)<<13;
+ /* Bit 0..2 */
+ (*bitstreamPtr) |= ((enc_bits->cb_index[8]))<<5; /* Bit 3..10 */
+ (*bitstreamPtr) |= ((enc_bits->cb_index[9])&0x1)<<4; /* Bit 11 */
+ (*bitstreamPtr) |= ((enc_bits->cb_index[10])&0xF0)>>4; /* Bit 12..15 */
+ bitstreamPtr++;
+ /* 22:nd int16_t */
+ (*bitstreamPtr) = ((uint16_t)(enc_bits->cb_index[10])&0xF)<<12;
+ /* Bit 0..3 */
+ (*bitstreamPtr) |= ((enc_bits->cb_index[11]))<<4; /* Bit 4..11 */
+ (*bitstreamPtr) |= ((enc_bits->cb_index[12])&0x1)<<3; /* Bit 12 */
+ (*bitstreamPtr) |= ((enc_bits->cb_index[13])&0xE0)>>5; /* Bit 13..15 */
+ bitstreamPtr++;
+ /* 23:rd int16_t */
+ (*bitstreamPtr) = ((uint16_t)(enc_bits->cb_index[13])&0x1F)<<11;
+ /* Bit 0..4 */
+ (*bitstreamPtr) |= ((enc_bits->cb_index[14]))<<3; /* Bit 5..12 */
+ (*bitstreamPtr) |= ((enc_bits->gain_index[3])&0x3)<<1; /* Bit 13..14 */
+ (*bitstreamPtr) |= ((enc_bits->gain_index[4])&0x1); /* Bit 15 */
+ bitstreamPtr++;
+ /* 24:rd int16_t */
+ (*bitstreamPtr) = ((uint16_t)(enc_bits->gain_index[5]))<<13;
+ /* Bit 0..2 */
+ (*bitstreamPtr) |= ((enc_bits->gain_index[6])&0x7)<<10; /* Bit 3..5 */
+ (*bitstreamPtr) |= ((enc_bits->gain_index[7])&0x3)<<8; /* Bit 6..7 */
+ (*bitstreamPtr) |= ((enc_bits->gain_index[8]))<<5; /* Bit 8..10 */
+ (*bitstreamPtr) |= ((enc_bits->gain_index[9])&0xF)<<1; /* Bit 11..14 */
+ (*bitstreamPtr) |= ((enc_bits->gain_index[10])&0x4)>>2; /* Bit 15 */
+ bitstreamPtr++;
+ /* 25:rd int16_t */
+ (*bitstreamPtr) = ((uint16_t)(enc_bits->gain_index[10])&0x3)<<14;
+ /* Bit 0..1 */
+ (*bitstreamPtr) |= ((enc_bits->gain_index[11]))<<11; /* Bit 2..4 */
+ (*bitstreamPtr) |= ((enc_bits->gain_index[12])&0xF)<<7; /* Bit 5..8 */
+ (*bitstreamPtr) |= ((enc_bits->gain_index[13])&0x7)<<4; /* Bit 9..11 */
+ (*bitstreamPtr) |= ((enc_bits->gain_index[14]))<<1; /* Bit 12..14 */
+ }
+ /* Last bit is automatically zero */
+
+ return;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-09-14 05:14:01 +0000