117 lines
2.7 KiB
C
117 lines
2.7 KiB
C
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// Copyright 2025-2026 Beken
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#if !defined(_G722_H_)
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#define _G722_H_
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#include <stdint.h>
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enum { G722_SAMPLE_RATE_8000 = 0x0001, G722_PACKED = 0x0002 };
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#ifndef INT16_MAX
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#define INT16_MAX 32767
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#endif
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#ifndef INT16_MIN
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#define INT16_MIN (-32768)
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#endif
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typedef struct {
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/*! TRUE if the operating in the special ITU test mode, with the band split filters
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disabled. */
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int itu_test_mode;
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/*! TRUE if the G.722 data is packed */
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int packed;
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/*! TRUE if encode from 8k samples/second */
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int eight_k;
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/*! 6 for 48000kbps, 7 for 56000kbps, or 8 for 64000kbps. */
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int bits_per_sample;
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/*! Signal history for the QMF */
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int x[24];
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struct {
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int s;
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int sp;
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int sz;
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int r[3];
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int a[3];
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int ap[3];
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int p[3];
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int d[7];
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int b[7];
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int bp[7];
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int sg[7];
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int nb;
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int det;
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} band[2];
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unsigned int in_buffer;
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int in_bits;
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unsigned int out_buffer;
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int out_bits;
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} g722_encode_state_t;
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typedef struct {
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/*! TRUE if the operating in the special ITU test mode, with the band split filters
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disabled. */
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int itu_test_mode;
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/*! TRUE if the G.722 data is packed */
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int packed;
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/*! TRUE if decode to 8k samples/second */
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int eight_k;
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/*! 6 for 48000kbps, 7 for 56000kbps, or 8 for 64000kbps. */
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int bits_per_sample;
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/*! Signal history for the QMF */
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int x[24];
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struct {
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int s;
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int sp;
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int sz;
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int r[3];
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int a[3];
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int ap[3];
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int p[3];
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int d[7];
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int b[7];
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int bp[7];
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int sg[7];
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int nb;
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int det;
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} band[2];
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unsigned int in_buffer;
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int in_bits;
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unsigned int out_buffer;
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int out_bits;
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} g722_decode_state_t;
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#ifdef __cplusplus
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extern "C" {
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#endif
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int g722_encode_init(g722_encode_state_t *s, int rate, int options);
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int g722_encode_release(g722_encode_state_t *s);
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int g722_encode(g722_encode_state_t *s, uint8_t g722_data[], const int16_t amp[], int len);
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int g722_decode_init(g722_decode_state_t *s, int rate, int options);
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int g722_decode_release(g722_decode_state_t *s);
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int g722_decode(g722_decode_state_t *s, int16_t amp[], const uint8_t g722_data[], int len);
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#ifdef __cplusplus
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}
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#endif
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#endif
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