1 | //transcode_celt.c: |
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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 libroardsp 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 | * libroardsp 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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21 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
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22 | * |
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23 | */ |
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24 | |
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25 | #include "libroardsp.h" |
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26 | |
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27 | #ifdef ROAR_HAVE_LIBCELT |
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28 | |
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29 | #define _16BIT (16/8) |
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30 | |
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31 | int roar_xcoder_celt_init (struct roar_xcoder * state) { |
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32 | struct roar_xcoder_celt * self = malloc(sizeof(struct roar_xcoder_celt)); |
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33 | struct roar_audio_info * info = &(state->info.pcm); |
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34 | |
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35 | if ( self == NULL ) |
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36 | return -1; |
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37 | |
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38 | // curruntly only 16 bit mode is supported |
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39 | if ( info->bits != 16 ) { |
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40 | free(self); |
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41 | return -1; |
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42 | } |
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43 | |
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44 | memset(self, 0, sizeof(struct roar_xcoder_celt)); |
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45 | |
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46 | state->inst = self; |
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47 | |
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48 | self->frame_size = 256; |
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49 | |
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50 | self->mode = celt_mode_create(info->rate, info->channels, self->frame_size, NULL); |
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51 | |
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52 | if ( self->mode == NULL ) { |
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53 | free(self); |
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54 | return -1; |
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55 | } |
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56 | |
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57 | if (state->encode) { |
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58 | self->encoder = celt_encoder_create(self->mode); |
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59 | if ( self->encoder == NULL ) { |
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60 | roar_xcoder_celt_uninit(state); |
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61 | return -1; |
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62 | } |
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63 | } else { |
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64 | self->decoder = celt_decoder_create(self->mode); |
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65 | if ( self->decoder == NULL ) { |
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66 | roar_xcoder_celt_uninit(state); |
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67 | return -1; |
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68 | } |
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69 | } |
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70 | |
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71 | return 0; |
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72 | } |
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73 | |
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74 | int roar_xcoder_celt_uninit (struct roar_xcoder * state) { |
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75 | struct roar_xcoder_celt * self = state->inst; |
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76 | |
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77 | if ( self->encoder ) |
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78 | celt_encoder_destroy(self->encoder); |
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79 | |
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80 | if ( self->decoder ) |
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81 | celt_decoder_destroy(self->decoder); |
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82 | |
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83 | if ( self->mode ) |
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84 | celt_mode_destroy(self->mode); |
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85 | |
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86 | free(self); |
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87 | |
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88 | return -1; |
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89 | } |
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90 | |
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91 | int roar_xcoder_celt_packet_size(struct roar_xcoder * state, int samples) { |
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92 | struct roar_xcoder_celt * self = state->inst; |
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93 | |
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94 | return self->frame_size; |
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95 | } |
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96 | |
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97 | int roar_xcoder_celt_encode (struct roar_xcoder * state, void * buf, size_t len) { |
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98 | struct roar_xcoder_celt * self = state->inst; |
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99 | |
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100 | if (!state->encode) |
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101 | return -1; |
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102 | |
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103 | if ( len != self->frame_size * _16BIT * state->info.pcm.channels ) |
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104 | return -1; |
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105 | |
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106 | if ( state->stage == ROAR_XCODER_STAGE_INITED ) { |
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107 | if ( roar_vio_write(state->backend, ROAR_CELT_MAGIC, ROAR_CELT_MAGIC_LEN) != ROAR_CELT_MAGIC_LEN ) |
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108 | return -1; |
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109 | state->stage = ROAR_XCODER_STAGE_MAGIC; |
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110 | } |
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111 | |
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112 | return -1; |
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113 | } |
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114 | |
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115 | int roar_xcoder_celt_decode (struct roar_xcoder * state, void * buf, size_t len) { |
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116 | struct roar_xcoder_celt * self = state->inst; |
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117 | |
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118 | if (state->encode) |
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119 | return -1; |
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120 | |
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121 | return -1; |
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122 | } |
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123 | |
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124 | #endif |
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125 | |
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126 | //ll |
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