src/lib/raop_buffer.h

   1 /**
   2  *  Copyright (C) 2011-2012  Juho Vähä-Herttua
   3  *
   4  *  This library is free software; you can redistribute it and/or
   5  *  modify it under the terms of the GNU Lesser General Public
   6  *  License as published by the Free Software Foundation; either
   7  *  version 2.1 of the License, or (at your option) any later version.
   8  *
   9  *  This library is distributed in the hope that it will be useful,
  10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  *  Lesser General Public License for more details.
  13  */
  14
  15 #ifndef RAOP_BUFFER_H
  16 #define RAOP_BUFFER_H
  17
  18 typedef struct raop_buffer_s raop_buffer_t;
  19
  20 /* From ALACMagicCookieDescription.txt at http://http://alac.macosforge.org/ */
  21 typedef struct {
  22         unsigned int frameLength;
  23         unsigned char compatibleVersion;
  24         unsigned char bitDepth;
  25         unsigned char pb;
  26         unsigned char mb;
  27         unsigned char kb;
  28         unsigned char numChannels;
  29         unsigned short maxRun;
  30         unsigned int maxFrameBytes;
  31         unsigned int avgBitRate;
  32         unsigned int sampleRate;
  33 } ALACSpecificConfig;
  34
  35 typedef int (*raop_resend_cb_t)(void *opaque, unsigned short seqno, unsigned short count);
  36
  37 raop_buffer_t *raop_buffer_init(const char *rtpmap,
  38                                 const char *fmtp,
  39                                 const unsigned char *aeskey,
  40                                 const unsigned char *aesiv);
  41
  42 const ALACSpecificConfig *raop_buffer_get_config(raop_buffer_t *raop_buffer);
  43 int raop_buffer_queue(raop_buffer_t *raop_buffer, unsigned char *data, unsigned short datalen, int use_seqnum);
  44 const void *raop_buffer_dequeue(raop_buffer_t *raop_buffer, int *length, int no_resend);
  45 void raop_buffer_handle_resends(raop_buffer_t *raop_buffer, raop_resend_cb_t resend_cb, void *opaque);
  46 void raop_buffer_flush(raop_buffer_t *raop_buffer, int next_seq);
  47
  48 void raop_buffer_destroy(raop_buffer_t *raop_buffer);
  49
  50 #endif