1 /* 2 * audio_parser.h, helper parser for audio codec data 3 * 4 * Copyright (c) 2009-2010 Wind River Systems, Inc. 5 * 6 * Licensed under the Apache License, Version 2.0 (the "License"); 7 * you may not use this file except in compliance with the License. 8 * You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, software 13 * distributed under the License is distributed on an "AS IS" BASIS, 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 * See the License for the specific language governing permissions and 16 * limitations under the License. 17 */ 18 19 #ifndef __WRS_OMXIL_AUDIO_PARSER 20 #define ___WRS_OMXIL_AUDIO_PARSER 21 22 #ifdef __cplusplus 23 extern "C" { 24 #endif 25 26 /* 27 * MP3 28 */ 29 30 #define MP3_HEADER_VERSION_25 0x0 31 #define MP3_HEADER_VERSION_2 0x2 32 #define MP3_HEADER_VERSION_1 0x3 33 34 #define MP3_HEADER_LAYER_3 0x1 35 #define MP3_HEADER_LAYER_2 0x2 36 #define MP3_HEADER_LAYER_1 0x3 37 38 #define MP3_HEADER_CRC_PROTECTED 0x0 39 #define MP3_HEADER_NOT_PROTECTED 0x1 40 41 #define MP3_HEADER_STEREO 0x0 42 #define MP3_HEADER_JOINT_STEREO 0x1 43 #define MP3_HEADER_DUAL_CHANNEL 0x2 44 #define MP3_HEADER_SINGLE_CHANNEL 0x3 45 46 int mp3_header_parse(const unsigned char *buffer, 47 int *version, int *layer, int *crc, int *bitrate, 48 int *frequency, int *channel, int *mode_extension, 49 int *frame_length, int *frame_duration); 50 51 /* end of MP3 */ 52 53 /* 54 * MP4 55 */ 56 57 int audio_specific_config_parse(const unsigned char *buffer, 58 int *aot, int *frequency, int *channel); 59 60 int audio_specific_config_bitcoding(unsigned char *buffer, 61 int aot, int frequency, int channel); 62 63 /* end of MP4 */ 64 65 #ifdef __cplusplus 66 } /* extern "C" */ 67 #endif 68 69 #endif /* ___WRS_OMXIL_AUDIO_PARSER */ 70