1 /*****************************************************************************
2 * audio_decoder.h : audio decoder interface
3 *****************************************************************************
4 * Copyright (C) 1999, 2000 VideoLAN
7 * Michel Kaempf <maxx@via.ecp.fr>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
22 *****************************************************************************/
24 /**** audio decoder API - public audio decoder structures */
26 typedef struct audiodec_s audiodec_t;
28 typedef struct adec_sync_info_s {
29 int sample_rate; /* sample rate in Hz */
30 int frame_size; /* frame size in bytes */
31 int bit_rate; /* nominal bit rate in kbps */
34 typedef struct adec_byte_stream_s {
40 /**** audio decoder API - functions publically provided by the audio dec. ****/
42 int adec_init (audiodec_t * p_adec);
43 int adec_sync_frame (audiodec_t * p_adec, adec_sync_info_t * p_sync_info);
44 int adec_decode_frame (audiodec_t * p_adec, s16 * buffer);
45 static adec_byte_stream_t * adec_byte_stream (audiodec_t * p_adec);
47 /**** audio decoder API - user functions to be provided to the audio dec. ****/
49 void adec_byte_stream_next (adec_byte_stream_t * p_byte_stream);
51 /**** EVERYTHING AFTER THIS POINT IS PRIVATE ! DO NOT USE DIRECTLY ****/
53 /**** audio decoder internal structures ****/
55 typedef struct adec_bank_s {
62 typedef struct adec_bit_stream_s {
65 adec_byte_stream_t byte_stream;
74 /* The bit stream structure handles the PES stream at the bit level */
75 adec_bit_stream_t bit_stream;
86 /**** audio decoder inline functions ****/
88 static adec_byte_stream_t * adec_byte_stream (audiodec_t * p_adec)
90 return &(p_adec->bit_stream.byte_stream);