Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 185 insertions, 0 deletions

diff --git a/third_party/libwebrtc/modules/audio_coding/codecs/ilbc/decode_residual.c b/third_party/libwebrtc/modules/audio_coding/codecs/ilbc/decode_residual.c
new file mode 100644
index 0000000000..a9668e2889
--- /dev/null
+++ b/third_party/libwebrtc/modules/audio_coding/codecs/ilbc/decode_residual.c
@@ -0,0 +1,185 @@
+/*
+ *  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_DecodeResidual.c
+
+******************************************************************/
+
+#include "modules/audio_coding/codecs/ilbc/decode_residual.h"
+
+#include <string.h>
+
+#include "modules/audio_coding/codecs/ilbc/cb_construct.h"
+#include "modules/audio_coding/codecs/ilbc/constants.h"
+#include "modules/audio_coding/codecs/ilbc/defines.h"
+#include "modules/audio_coding/codecs/ilbc/do_plc.h"
+#include "modules/audio_coding/codecs/ilbc/enhancer_interface.h"
+#include "modules/audio_coding/codecs/ilbc/index_conv_dec.h"
+#include "modules/audio_coding/codecs/ilbc/lsf_check.h"
+#include "modules/audio_coding/codecs/ilbc/state_construct.h"
+#include "modules/audio_coding/codecs/ilbc/xcorr_coef.h"
+
+/*----------------------------------------------------------------*
+ *  frame residual decoder function (subrutine to iLBC_decode)
+ *---------------------------------------------------------------*/
+
+bool WebRtcIlbcfix_DecodeResidual(
+    IlbcDecoder *iLBCdec_inst,
+    /* (i/o) the decoder state structure */
+    iLBC_bits *iLBC_encbits, /* (i/o) Encoded bits, which are used
+                                for the decoding  */
+    int16_t *decresidual,  /* (o) decoded residual frame */
+    int16_t *syntdenum   /* (i) the decoded synthesis filter
+                                  coefficients */
+                                  ) {
+  size_t meml_gotten, diff, start_pos;
+  size_t subcount, subframe;
+  int16_t *reverseDecresidual = iLBCdec_inst->enh_buf; /* Reversed decoded data, used for decoding backwards in time (reuse memory in state) */
+  int16_t *memVec = iLBCdec_inst->prevResidual;  /* Memory for codebook and filter state (reuse memory in state) */
+  int16_t *mem = &memVec[CB_HALFFILTERLEN];   /* Memory for codebook */
+
+  diff = STATE_LEN - iLBCdec_inst->state_short_len;
+
+  if (iLBC_encbits->state_first == 1) {
+    start_pos = (iLBC_encbits->startIdx-1)*SUBL;
+  } else {
+    start_pos = (iLBC_encbits->startIdx-1)*SUBL + diff;
+  }
+
+  /* decode scalar part of start state */
+
+  WebRtcIlbcfix_StateConstruct(iLBC_encbits->idxForMax,
+                               iLBC_encbits->idxVec, &syntdenum[(iLBC_encbits->startIdx-1)*(LPC_FILTERORDER+1)],
+                               &decresidual[start_pos], iLBCdec_inst->state_short_len
+                               );
+
+  if (iLBC_encbits->state_first) { /* put adaptive part in the end */
+
+    /* setup memory */
+
+    WebRtcSpl_MemSetW16(mem, 0, CB_MEML - iLBCdec_inst->state_short_len);
+    WEBRTC_SPL_MEMCPY_W16(mem+CB_MEML-iLBCdec_inst->state_short_len, decresidual+start_pos,
+                          iLBCdec_inst->state_short_len);
+
+    /* construct decoded vector */
+
+    if (!WebRtcIlbcfix_CbConstruct(
+            &decresidual[start_pos + iLBCdec_inst->state_short_len],
+            iLBC_encbits->cb_index, iLBC_encbits->gain_index,
+            mem + CB_MEML - ST_MEM_L_TBL, ST_MEM_L_TBL, diff))
+      return false;  // Error.
+
+  }
+  else {/* put adaptive part in the beginning */
+
+    /* setup memory */
+
+    meml_gotten = iLBCdec_inst->state_short_len;
+    WebRtcSpl_MemCpyReversedOrder(mem+CB_MEML-1,
+                                  decresidual+start_pos, meml_gotten);
+    WebRtcSpl_MemSetW16(mem, 0, CB_MEML - meml_gotten);
+
+    /* construct decoded vector */
+
+    if (!WebRtcIlbcfix_CbConstruct(reverseDecresidual, iLBC_encbits->cb_index,
+                                   iLBC_encbits->gain_index,
+                                   mem + CB_MEML - ST_MEM_L_TBL, ST_MEM_L_TBL,
+                                   diff))
+      return false;  // Error.
+
+    /* get decoded residual from reversed vector */
+
+    WebRtcSpl_MemCpyReversedOrder(&decresidual[start_pos-1],
+                                  reverseDecresidual, diff);
+  }
+
+  /* counter for predicted subframes */
+
+  subcount=1;
+
+  /* forward prediction of subframes */
+
+  if (iLBCdec_inst->nsub > iLBC_encbits->startIdx + 1) {
+
+    /* setup memory */
+    WebRtcSpl_MemSetW16(mem, 0, CB_MEML-STATE_LEN);
+    WEBRTC_SPL_MEMCPY_W16(mem+CB_MEML-STATE_LEN,
+                          decresidual+(iLBC_encbits->startIdx-1)*SUBL, STATE_LEN);
+
+    /* loop over subframes to encode */
+
+    size_t Nfor = iLBCdec_inst->nsub - iLBC_encbits->startIdx - 1;
+    for (subframe=0; subframe<Nfor; subframe++) {
+
+      /* construct decoded vector */
+      if (!WebRtcIlbcfix_CbConstruct(
+              &decresidual[(iLBC_encbits->startIdx + 1 + subframe) * SUBL],
+              iLBC_encbits->cb_index + subcount * CB_NSTAGES,
+              iLBC_encbits->gain_index + subcount * CB_NSTAGES, mem, MEM_LF_TBL,
+              SUBL))
+        return false;  // Error;
+
+      /* update memory */
+      memmove(mem, mem + SUBL, (CB_MEML - SUBL) * sizeof(*mem));
+      WEBRTC_SPL_MEMCPY_W16(mem+CB_MEML-SUBL,
+                            &decresidual[(iLBC_encbits->startIdx+1+subframe)*SUBL], SUBL);
+
+      subcount++;
+    }
+
+  }
+
+  /* backward prediction of subframes */
+
+  if (iLBC_encbits->startIdx > 1) {
+
+    /* setup memory */
+
+    meml_gotten = SUBL*(iLBCdec_inst->nsub+1-iLBC_encbits->startIdx);
+    if( meml_gotten > CB_MEML ) {
+      meml_gotten=CB_MEML;
+    }
+
+    WebRtcSpl_MemCpyReversedOrder(mem+CB_MEML-1,
+                                  decresidual+(iLBC_encbits->startIdx-1)*SUBL, meml_gotten);
+    WebRtcSpl_MemSetW16(mem, 0, CB_MEML - meml_gotten);
+
+    /* loop over subframes to decode */
+
+    size_t Nback = iLBC_encbits->startIdx - 1;
+    for (subframe=0; subframe<Nback; subframe++) {
+
+      /* construct decoded vector */
+      if (!WebRtcIlbcfix_CbConstruct(
+              &reverseDecresidual[subframe * SUBL],
+              iLBC_encbits->cb_index + subcount * CB_NSTAGES,
+              iLBC_encbits->gain_index + subcount * CB_NSTAGES, mem, MEM_LF_TBL,
+              SUBL))
+        return false;  // Error.
+
+      /* update memory */
+      memmove(mem, mem + SUBL, (CB_MEML - SUBL) * sizeof(*mem));
+      WEBRTC_SPL_MEMCPY_W16(mem+CB_MEML-SUBL,
+                            &reverseDecresidual[subframe*SUBL], SUBL);
+
+      subcount++;
+    }
+
+    /* get decoded residual from reversed vector */
+    WebRtcSpl_MemCpyReversedOrder(decresidual+SUBL*Nback-1,
+                                  reverseDecresidual, SUBL*Nback);
+  }
+
+  return true;  // Success.
+}