26cee86a0c
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@22155 a1c6a512-1295-4272-9138-f99709370657
100 lines
2.9 KiB
C
100 lines
2.9 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2009 Mohamed Tarek
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#ifndef _RM_H
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#define _RM_H
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#include <stdio.h>
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#include <inttypes.h>
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#define MAX_EXTRADATA_SIZE 16
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#define DATA_HEADER_SIZE 18
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#define PACKET_HEADER_SIZE 12
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enum codecs {
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CODEC_COOK,
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CODEC_AAC,
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CODEC_AC3
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};
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typedef struct rm_packet
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{
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uint8_t *frames[100]; /* Pointers to ordered audio frames in buffer */
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uint16_t version;
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uint16_t length;
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uint32_t timestamp;
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uint16_t stream_number;
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uint8_t flags;
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#ifdef TEST
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uint8_t data[30000]; /* Reordered data. No malloc, hence the size */
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#endif
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}RMPacket;
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typedef struct rm_context
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{
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/* Demux Context */
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int old_format;
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int current_stream;
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int remaining_len;
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int audio_stream_num; /*< Stream number for audio packets*/
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int audio_pkt_cnt; /* Output packet counter*/
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/* Stream Variables */
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uint32_t data_offset;
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uint32_t duration;
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uint32_t audiotimestamp; /* Audio packet timestamp*/
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uint16_t sub_packet_cnt; /* Subpacket counter, used while reading */
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uint16_t sub_packet_size, sub_packet_h, coded_framesize; /* Descrambling parameters from container */
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uint16_t audio_framesize; /* Audio frame size from container */
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uint16_t sub_packet_lengths[16]; /* Length of each subpacket */
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/* Codec Context */
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enum codecs codec_type;
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uint16_t block_align;
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uint32_t nb_packets;
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int frame_number;
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uint16_t sample_rate;
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uint16_t nb_channels;
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uint32_t bit_rate;
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uint16_t flags;
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/*codec extradata*/
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uint32_t extradata_size;
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uint8_t codec_extradata[MAX_EXTRADATA_SIZE];
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} RMContext;
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int real_parse_header(int fd, RMContext *rmctx);
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/* Get a (sub_packet_h*frames_per_packet) number of audio frames from a memory buffer */
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int rm_get_packet(uint8_t **src,RMContext *rmctx, RMPacket *pkt);
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#ifdef TEST
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int filesize(int fd);
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void advance_buffer(uint8_t **buf, int val);
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/* Get a (sub_packet_h*frames_per_packet) number of audio frames from a file descriptor */
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void rm_get_packet_fd(int fd,RMContext *rmctx, RMPacket *pkt);
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#endif /* TEST */
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#endif /* _RM_H */
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