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Side by Side Diff: webrtc/modules/audio_coding/codecs/isac/fix/source/entropy_coding.c

Issue 1179093002: Reland "Upconvert various types to int.", isac portion. (Closed) Base URL: https://chromium.googlesource.com/external/webrtc@master
Patch Set: Created 5 years, 6 months ago
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1 /* 1 /*
2 * Copyright (c) 2011 The WebRTC project authors. All Rights Reserved. 2 * Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
3 * 3 *
4 * Use of this source code is governed by a BSD-style license 4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source 5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found 6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may 7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree. 8 * be found in the AUTHORS file in the root of the source tree.
9 */ 9 */
10 10
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443 } 443 }
444 } 444 }
445 445
446 446
447 447
448 448
449 /* 449 /*
450 * function to decode the complex spectrum from the bitstream 450 * function to decode the complex spectrum from the bitstream
451 * returns the total number of bytes in the stream 451 * returns the total number of bytes in the stream
452 */ 452 */
453 int16_t WebRtcIsacfix_DecodeSpec(Bitstr_dec *streamdata, 453 int WebRtcIsacfix_DecodeSpec(Bitstr_dec *streamdata,
454 int16_t *frQ7, 454 int16_t *frQ7,
455 int16_t *fiQ7, 455 int16_t *fiQ7,
456 int16_t AvgPitchGain_Q12) 456 int16_t AvgPitchGain_Q12)
457 { 457 {
458 int16_t data[FRAMESAMPLES]; 458 int16_t data[FRAMESAMPLES];
459 int32_t invARSpec2_Q16[FRAMESAMPLES/4]; 459 int32_t invARSpec2_Q16[FRAMESAMPLES/4];
460 int16_t ARCoefQ12[AR_ORDER+1]; 460 int16_t ARCoefQ12[AR_ORDER+1];
461 int16_t RCQ15[AR_ORDER]; 461 int16_t RCQ15[AR_ORDER];
462 int16_t gainQ10; 462 int16_t gainQ10;
463 int32_t gain2_Q10; 463 int32_t gain2_Q10;
464 int16_t len; 464 int len;
465 int k; 465 int k;
466 466
467 /* create dither signal */ 467 /* create dither signal */
468 GenerateDitherQ7(data, streamdata->W_upper, FRAMESAMPLES, AvgPitchGain_Q12); / * Dither is output in vector 'Data' */ 468 GenerateDitherQ7(data, streamdata->W_upper, FRAMESAMPLES, AvgPitchGain_Q12); / * Dither is output in vector 'Data' */
469 469
470 /* decode model parameters */ 470 /* decode model parameters */
471 if (WebRtcIsacfix_DecodeRcCoef(streamdata, RCQ15) < 0) 471 if (WebRtcIsacfix_DecodeRcCoef(streamdata, RCQ15) < 0)
472 return -ISAC_RANGE_ERROR_DECODE_SPECTRUM; 472 return -ISAC_RANGE_ERROR_DECODE_SPECTRUM;
473 473
474 474
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2025 2025
2026 index_gQQ[k] = pos2QQ + WebRtcIsacfix_kQuantMinGain[k]; //ATTN: ok? 2026 index_gQQ[k] = pos2QQ + WebRtcIsacfix_kQuantMinGain[k]; //ATTN: ok?
2027 if (index_gQQ[k] < 0) { 2027 if (index_gQQ[k] < 0) {
2028 index_gQQ[k] = 0; 2028 index_gQQ[k] = 0;
2029 } 2029 }
2030 else if (index_gQQ[k] > WebRtcIsacfix_kMaxIndGain[k]) { 2030 else if (index_gQQ[k] > WebRtcIsacfix_kMaxIndGain[k]) {
2031 index_gQQ[k] = WebRtcIsacfix_kMaxIndGain[k]; 2031 index_gQQ[k] = WebRtcIsacfix_kMaxIndGain[k];
2032 } 2032 }
2033 } 2033 }
2034 } 2034 }
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