[2168] | 1 | //transcode.h: |
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| 2 | |
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| 3 | /* |
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| 4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2009 |
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| 5 | * |
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| 6 | * This file is part of libroar a part of RoarAudio, |
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| 7 | * a cross-platform sound system for both, home and professional use. |
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| 8 | * See README for details. |
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| 9 | * |
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| 10 | * This file is free software; you can redistribute it and/or modify |
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| 11 | * it under the terms of the GNU General Public License version 3 |
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| 12 | * as published by the Free Software Foundation. |
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| 13 | * |
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| 14 | * libroar is distributed in the hope that it will be useful, |
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| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 17 | * GNU General Public License for more details. |
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| 18 | * |
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| 19 | * You should have received a copy of the GNU General Public License |
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| 20 | * along with this software; see the file COPYING. If not, write to |
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[3517] | 21 | * the Free Software Foundation, 51 Franklin Street, Fifth Floor, |
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| 22 | * Boston, MA 02110-1301, USA. |
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[2168] | 23 | * |
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| 24 | * NOTE for everyone want's to change something and send patches: |
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| 25 | * read README and HACKING! There a addition information on |
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| 26 | * the license of this document you need to read before you send |
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| 27 | * any patches. |
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| 28 | * |
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| 29 | * NOTE for uses of non-GPL (LGPL,...) software using libesd, libartsc |
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| 30 | * or libpulse*: |
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| 31 | * The libs libroaresd, libroararts and libroarpulse link this lib |
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| 32 | * and are therefore GPL. Because of this it may be illigal to use |
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| 33 | * them with any software that uses libesd, libartsc or libpulse*. |
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| 34 | */ |
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| 35 | |
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[2169] | 36 | #ifndef _LIBROARDSP_TRANSCODE_H_ |
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| 37 | #define _LIBROARDSP_TRANSCODE_H_ |
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[2168] | 38 | |
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[2169] | 39 | #include "libroardsp.h" |
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[2168] | 40 | |
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[2170] | 41 | #define ROAR_XCODER_STAGE_NONE 0 |
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| 42 | #define ROAR_XCODER_STAGE_INITED 0 |
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| 43 | #define ROAR_XCODER_STAGE_WAIT 1 |
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| 44 | #define ROAR_XCODER_STAGE_MAGIC 2 |
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| 45 | #define ROAR_XCODER_STAGE_OPENING 3 |
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| 46 | #define ROAR_XCODER_STAGE_OPENED 4 |
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| 47 | #define ROAR_XCODER_STAGE_CLOSING 5 |
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| 48 | #define ROAR_XCODER_STAGE_CLOSED 6 |
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| 49 | |
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| 50 | #define ROAR_BIXCODER_FLAGS_NONE 0x0000 |
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| 51 | #define ROAR_BIXCODER_FLAGS_ENCODE 0x0001 |
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| 52 | #define ROAR_BIXCODER_FLAGS_DECODE 0x0002 |
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| 53 | |
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| 54 | struct roar_xcoder; |
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| 55 | |
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| 56 | struct roar_xcoder_entry { |
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[2175] | 57 | int codec; |
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[2170] | 58 | int (*init)(struct roar_xcoder * state); |
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| 59 | int (*uninit)(struct roar_xcoder * state); |
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| 60 | int (*packet_size)(struct roar_xcoder * state, int samples); |
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[2171] | 61 | int (*encode)(struct roar_xcoder * state, void * buf, size_t len); |
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| 62 | int (*decode)(struct roar_xcoder * state, void * buf, size_t len); |
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[2921] | 63 | int (*proc_header)(struct roar_xcoder * state); |
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[2170] | 64 | }; |
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| 65 | |
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| 66 | struct roar_xcoder { |
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| 67 | void * inst; |
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| 68 | struct roar_xcoder_entry * entry; |
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| 69 | struct roar_vio_calls * backend; |
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[2171] | 70 | int encode; |
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[2170] | 71 | int flags; |
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| 72 | int stage; |
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| 73 | ssize_t packet_len; |
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| 74 | struct roar_buffer * iobuffer; |
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| 75 | struct { |
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| 76 | struct roar_audio_info coded; |
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| 77 | struct roar_audio_info pcm; |
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| 78 | } info; |
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| 79 | }; |
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| 80 | |
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| 81 | struct roar_bixcoder { |
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| 82 | struct roar_xcoder encoder, decoder; |
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| 83 | int flags; |
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| 84 | }; |
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| 85 | |
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| 86 | struct roar_transcoder { |
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| 87 | struct roar_xcoder encoder, decoder; |
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| 88 | }; |
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| 89 | |
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| 90 | int roar_xcoder_init(struct roar_xcoder * state, int encoder, struct roar_audio_info * info, struct roar_vio_calls * vio); |
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| 91 | int roar_xcoder_set_backend(struct roar_xcoder * state, struct roar_vio_calls * vio); |
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| 92 | int roar_xcoder_packet_size(struct roar_xcoder * state, int samples); |
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| 93 | int roar_xcoder_close (struct roar_xcoder * state); |
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[2921] | 94 | int roar_xcoder_proc_header(struct roar_xcoder * state); |
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[2170] | 95 | int roar_xcoder_proc_packet(struct roar_xcoder * state, void * buf, size_t len); |
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| 96 | int roar_xcoder_proc (struct roar_xcoder * state, void * buf, size_t len); |
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| 97 | |
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| 98 | int roar_bixcoder_init(struct roar_bixcoder * state, struct roar_audio_info * info, struct roar_vio_calls * vio); |
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| 99 | int roar_bixcoder_packet_size (struct roar_bixcoder * state, int samples); |
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| 100 | int roar_bixcoder_close (struct roar_bixcoder * state); |
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[2921] | 101 | int roar_bixcoder_read_header (struct roar_bixcoder * state); |
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[2170] | 102 | int roar_bixcoder_read_packet (struct roar_bixcoder * state, void * buf, size_t len); |
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| 103 | int roar_bixcoder_read (struct roar_bixcoder * state, void * buf, size_t len); |
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[2921] | 104 | int roar_bixcoder_write_header(struct roar_bixcoder * state); |
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[2170] | 105 | int roar_bixcoder_write_packet(struct roar_bixcoder * state, void * buf, size_t len); |
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| 106 | int roar_bixcoder_write (struct roar_bixcoder * state, void * buf, size_t len); |
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| 107 | |
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[2172] | 108 | // dummy functions used by some de/encoders: |
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| 109 | int roar_xcoder_dummy_inituninit(struct roar_xcoder * state); |
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| 110 | int roar_xcoder_dummy_packet_size_any(struct roar_xcoder * state, int samples); |
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[2922] | 111 | int roar_xcoder_dummy_proc_header(struct roar_xcoder * state); |
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[2172] | 112 | |
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[2179] | 113 | // prototypes for some simple xcoders: |
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| 114 | int roar_xcoder_alaw_encode(struct roar_xcoder * state, void * buf, size_t len); |
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| 115 | int roar_xcoder_alaw_decode(struct roar_xcoder * state, void * buf, size_t len); |
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| 116 | |
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| 117 | int roar_xcoder_mulaw_encode(struct roar_xcoder * state, void * buf, size_t len); |
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| 118 | int roar_xcoder_mulaw_decode(struct roar_xcoder * state, void * buf, size_t len); |
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| 119 | |
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[2168] | 120 | #endif |
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| 121 | |
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| 122 | //ll |
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