apps/codecs/librm/rm.h

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2009 Mohamed Tarek
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  18  * KIND, either express or implied.
  19  *
  20  ****************************************************************************/
  21 #ifndef _RM_H
  22 #define _RM_H
  23
  24 #include <stdio.h>
  25 #include <inttypes.h>
  26 #include "bytestream.h"
  27
  28 #define MAX_EXTRADATA_SIZE 16
  29 #define DATA_HEADER_SIZE 18
  30 #define PACKET_HEADER_SIZE 12
  31
  32 enum codecs {
  33     CODEC_COOK,
  34     CODEC_AAC,
  35     CODEC_AC3,
  36     CODEC_ATRAC
  37 };
  38
  39 typedef struct rm_packet
  40 {
  41     uint8_t *frames[100]; /* Pointers to ordered audio frames in buffer */
  42     uint16_t version;
  43     uint16_t length;
  44     uint32_t timestamp;
  45     uint16_t stream_number;
  46     uint8_t  flags;
  47
  48 #ifdef TEST
  49     uint8_t  data[30000]; /* Reordered data. No malloc, hence the size */
  50 #endif
  51 }RMPacket;
  52
  53 typedef struct rm_context
  54 {
  55     /* Demux Context */
  56     int old_format;
  57     int current_stream;
  58     int remaining_len;
  59     int audio_stream_num; /*< Stream number for audio packets*/
  60     int audio_pkt_cnt; /* Output packet counter*/
  61
  62     /* Stream Variables */
  63     uint32_t data_offset;
  64     uint32_t duration;
  65     uint32_t audiotimestamp; /* Audio packet timestamp*/
  66     uint16_t sub_packet_cnt; /* Subpacket counter, used while reading */
  67     uint16_t sub_packet_size, sub_packet_h, coded_framesize; /* Descrambling parameters from container */
  68     uint16_t audio_framesize; /* Audio frame size from container */
  69     uint16_t sub_packet_lengths[16]; /* Length of each subpacket */
  70
  71     /* Codec Context */
  72     enum codecs codec_type;
  73     uint16_t block_align;
  74     uint32_t nb_packets;
  75     int frame_number;
  76     uint16_t sample_rate;
  77     uint16_t nb_channels;
  78     uint32_t bit_rate;
  79     uint16_t flags;
  80
  81     /*codec extradata*/
  82     uint32_t extradata_size;
  83     uint8_t  codec_extradata[MAX_EXTRADATA_SIZE];
  84
  85 } RMContext;
  86
  87 int real_parse_header(int fd, RMContext *rmctx);
  88
  89 /* Get a (sub_packet_h*frames_per_packet) number of audio frames from a memory buffer */
  90 int rm_get_packet(uint8_t **src,RMContext *rmctx, RMPacket *pkt);
  91
  92 #ifdef TEST
  93
  94 int filesize(int fd);
  95 void advance_buffer(uint8_t **buf, int val);
  96
  97 /* Get a (sub_packet_h*frames_per_packet) number of audio frames from a file descriptor */
  98 void rm_get_packet_fd(int fd,RMContext *rmctx, RMPacket *pkt);
  99
 100 #endif /* TEST */
 101
 102 #endif /* _RM_H */