1 /* 2 * Copyright (c) 2011 The WebRTC project authors. All Rights Reserved. 3 * 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 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 /* 12 * arith_routines.h 13 * 14 * Functions for arithmetic coding. 15 * 16 */ 17 18 #ifndef WEBRTC_MODULES_AUDIO_CODING_CODECS_ISAC_MAIN_SOURCE_ARITH_ROUTINES_H_ 19 #define WEBRTC_MODULES_AUDIO_CODING_CODECS_ISAC_MAIN_SOURCE_ARITH_ROUTINES_H_ 20 21 #include "structs.h" 22 23 24 int WebRtcIsac_EncLogisticMulti2( 25 Bitstr *streamdata, /* in-/output struct containing bitstream */ 26 WebRtc_Word16 *dataQ7, /* input: data vector */ 27 const WebRtc_UWord16 *env, /* input: side info vector defining the width of the pdf */ 28 const int N, /* input: data vector length */ 29 const WebRtc_Word16 isSWB12kHz); /* if the codec is working in 12kHz bandwidth */ 30 31 /* returns the number of bytes in the stream */ 32 int WebRtcIsac_EncTerminate(Bitstr *streamdata); /* in-/output struct containing bitstream */ 33 34 /* returns the number of bytes in the stream so far */ 35 int WebRtcIsac_DecLogisticMulti2( 36 WebRtc_Word16 *data, /* output: data vector */ 37 Bitstr *streamdata, /* in-/output struct containing bitstream */ 38 const WebRtc_UWord16 *env, /* input: side info vector defining the width of the pdf */ 39 const WebRtc_Word16 *dither, /* input: dither vector */ 40 const int N, /* input: data vector length */ 41 const WebRtc_Word16 isSWB12kHz); /* if the codec is working in 12kHz bandwidth */ 42 43 void WebRtcIsac_EncHistMulti( 44 Bitstr *streamdata, /* in-/output struct containing bitstream */ 45 const int *data, /* input: data vector */ 46 const WebRtc_UWord16 **cdf, /* input: array of cdf arrays */ 47 const int N); /* input: data vector length */ 48 49 int WebRtcIsac_DecHistBisectMulti( 50 int *data, /* output: data vector */ 51 Bitstr *streamdata, /* in-/output struct containing bitstream */ 52 const WebRtc_UWord16 **cdf, /* input: array of cdf arrays */ 53 const WebRtc_UWord16 *cdf_size, /* input: array of cdf table sizes+1 (power of two: 2^k) */ 54 const int N); /* input: data vector length */ 55 56 int WebRtcIsac_DecHistOneStepMulti( 57 int *data, /* output: data vector */ 58 Bitstr *streamdata, /* in-/output struct containing bitstream */ 59 const WebRtc_UWord16 **cdf, /* input: array of cdf arrays */ 60 const WebRtc_UWord16 *init_index,/* input: vector of initial cdf table search entries */ 61 const int N); /* input: data vector length */ 62 63 #endif /* WEBRTC_MODULES_AUDIO_CODING_CODECS_ISAC_MAIN_SOURCE_ARITH_ROUTINES_H_ */ 64
