1 | //codecfilter_celt.c: |
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2 | |
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3 | /* |
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4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2008 |
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5 | * |
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6 | * This file is part of roard 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 | * RoarAudio 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 "roard.h" |
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26 | #ifdef ROAR_HAVE_LIBCELT |
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27 | |
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28 | int cf_celt_open(CODECFILTER_USERDATA_T * inst, int codec, |
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29 | struct roar_stream_server * info, |
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30 | struct roar_codecfilter * filter) { |
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31 | struct codecfilter_celt_inst * self = malloc(sizeof(struct codecfilter_celt_inst)); |
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32 | struct roar_stream * s = ROAR_STREAM(info); |
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33 | |
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34 | if ( !self ) |
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35 | return -1; |
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36 | |
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37 | /* |
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38 | CELTMode * mode; |
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39 | CELTEncoder * encoder; |
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40 | CELTDecoder * decoder; |
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41 | int frame_size; |
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42 | int lookahead; |
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43 | int out_size; |
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44 | char * ibuf; |
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45 | char * obuf; |
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46 | char * rest; |
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47 | int s_buf; |
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48 | int f_rest; /-* how much is in rest? *-/ |
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49 | */ |
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50 | |
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51 | self->stream = info; |
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52 | self->frame_size = 256; |
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53 | self->lookahead = self->frame_size; |
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54 | self->encoder = NULL; |
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55 | self->decoder = NULL; |
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56 | self->opened = 0; |
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57 | self->s_buf = s->info.channels * self->frame_size * 2; |
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58 | self->ibuf = malloc(self->s_buf); |
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59 | self->obuf = malloc(self->s_buf); |
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60 | self->i_rest = malloc(self->s_buf); |
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61 | self->o_rest = malloc(self->s_buf); |
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62 | self->fi_rest = 0; |
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63 | self->fo_rest = 0; |
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64 | |
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65 | if ( !(self->ibuf && self->obuf && self->i_rest && self->o_rest) ) { |
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66 | if ( self->ibuf ) |
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67 | free(self->ibuf); |
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68 | |
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69 | if ( self->obuf ) |
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70 | free(self->obuf); |
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71 | |
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72 | if ( self->i_rest ) |
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73 | free(self->o_rest); |
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74 | |
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75 | if ( self->o_rest ) |
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76 | free(self->o_rest); |
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77 | |
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78 | free(self); |
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79 | return -1; |
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80 | } |
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81 | |
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82 | self->mode = celt_mode_create(s->info.rate, s->info.channels, self->frame_size, NULL); |
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83 | |
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84 | if ( !self->mode ) { |
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85 | free(self); |
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86 | return -1; |
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87 | } |
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88 | |
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89 | if ( s->dir == ROAR_DIR_PLAY ) { |
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90 | self->decoder = celt_decoder_create(self->mode); |
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91 | } else if ( s->dir == ROAR_DIR_MONITOR || s->dir == ROAR_DIR_OUTPUT ) { |
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92 | self->encoder = celt_encoder_create(self->mode); |
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93 | } else { |
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94 | celt_mode_destroy(self->mode); |
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95 | free(self); |
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96 | return -1; |
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97 | } |
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98 | |
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99 | *inst = (CODECFILTER_USERDATA_T) self; |
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100 | |
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101 | s->info.codec = ROAR_CODEC_DEFAULT; |
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102 | s->info.bits = 16; // CELT hardcoded |
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103 | |
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104 | return 0; |
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105 | } |
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106 | |
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107 | int cf_celt_close(CODECFILTER_USERDATA_T inst) { |
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108 | struct codecfilter_celt_inst * self = (struct codecfilter_celt_inst *) inst; |
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109 | |
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110 | if ( !inst ) |
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111 | return -1; |
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112 | |
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113 | if ( self->encoder ) |
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114 | celt_encoder_destroy(self->encoder); |
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115 | |
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116 | if ( self->decoder ) |
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117 | celt_decoder_destroy(self->decoder); |
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118 | |
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119 | if ( self->mode ) |
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120 | celt_mode_destroy(self->mode); |
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121 | |
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122 | if ( self->ibuf ) |
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123 | free(self->ibuf); |
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124 | |
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125 | if ( self->obuf ) |
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126 | free(self->obuf); |
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127 | |
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128 | if ( self->i_rest ) |
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129 | free(self->i_rest); |
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130 | |
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131 | if ( self->o_rest ) |
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132 | free(self->o_rest); |
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133 | |
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134 | free(inst); |
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135 | return 0; |
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136 | } |
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137 | |
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138 | int cf_celt_read(CODECFILTER_USERDATA_T inst, char * buf, int len) { |
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139 | struct codecfilter_celt_inst * self = (struct codecfilter_celt_inst *) inst; |
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140 | int r = 0; |
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141 | uint16_t fs; |
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142 | char * cbuf; |
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143 | char magic[ROAR_CELT_MAGIC_LEN]; |
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144 | |
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145 | // printf("buf=%p, len=%i\n", buf, len); |
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146 | |
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147 | if ( !self->opened ) { |
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148 | errno = ENOSYS; |
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149 | if ( stream_vio_s_read(self->stream, magic, ROAR_CELT_MAGIC_LEN) != ROAR_CELT_MAGIC_LEN ) |
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150 | return -1; |
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151 | if ( memcmp(magic, ROAR_CELT_MAGIC, ROAR_CELT_MAGIC_LEN) != 0 ) |
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152 | return -1; |
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153 | |
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154 | errno = 0; |
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155 | self->opened = 1; |
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156 | } |
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157 | |
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158 | if ( self->fi_rest ) { |
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159 | memcpy(buf, self->i_rest, self->fi_rest); |
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160 | r += self->fi_rest; |
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161 | self->fi_rest = 0; |
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162 | } |
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163 | |
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164 | while ( r <= (len - self->s_buf) ) { |
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165 | if ( stream_vio_s_read(self->stream, &fs, 2) != 2 ) |
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166 | break; |
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167 | |
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168 | fs = ROAR_NET2HOST16(fs); |
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169 | |
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170 | if ( fs > self->s_buf ) |
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171 | return -1; |
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172 | |
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173 | if ( stream_vio_s_read(self->stream, self->ibuf, fs) != fs ) |
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174 | return -1; |
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175 | |
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176 | cbuf = buf + r; |
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177 | |
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178 | // printf("buf=%p, r=%i // cbuf=%p\n", buf, r, cbuf); |
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179 | if ( celt_decode(self->decoder, (unsigned char *) self->ibuf, fs, (celt_int16_t *) cbuf) < 0 ) |
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180 | return -1; |
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181 | |
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182 | r += self->s_buf; |
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183 | } |
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184 | |
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185 | if ( r < len ) { |
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186 | // printf("r < len!\n"); |
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187 | if ( stream_vio_s_read(self->stream, &fs, 2) == 2 ) { |
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188 | fs = ROAR_NET2HOST16(fs); |
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189 | // printf("next: fs=%i\n", fs); |
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190 | if ( fs > self->s_buf ) |
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191 | return -1; |
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192 | if ( stream_vio_s_read(self->stream, self->ibuf, fs) == fs ) { |
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193 | // printf("got data!\n"); |
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194 | if ( celt_decode(self->decoder, (unsigned char *) self->ibuf, fs, (celt_int16_t *) self->obuf) >= 0 ) { |
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195 | // printf("{ // decode rest\n"); |
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196 | // printf(" r=%i // need %i Bytes\n", r, len - r); |
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197 | // printf(" memcpy(buf+%i, self->obuf, %i) = ?\n", r, len - r); |
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198 | memcpy(buf+r, self->obuf, len - r); |
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199 | self->fi_rest = self->s_buf + r - len; |
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200 | memcpy(self->i_rest, self->obuf + len - r, self->fi_rest); |
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201 | // printf(" len=%i, r=%i, fi_rest=%i, s_buf=%i\n", len, r, self->fi_rest, self->s_buf); |
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202 | r = len; |
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203 | // printf("}\n"); |
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204 | } |
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205 | } |
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206 | } |
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207 | } |
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208 | |
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209 | ROAR_DBG("cf_celt_read(inst=%p, buf=%p, len=%i) = %i", inst, buf, len, r); |
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210 | return r; |
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211 | } |
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212 | |
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213 | #define BS (ROAR_STREAM(self->stream)->info.channels * 64) |
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214 | int cf_celt_write(CODECFILTER_USERDATA_T inst, char * buf, int len) { |
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215 | struct codecfilter_celt_inst * self = (struct codecfilter_celt_inst *) inst; |
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216 | int have = 0; |
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217 | int org_len = len; |
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218 | int diff; |
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219 | int fs2 = self->frame_size * 2 * ROAR_STREAM(self->stream)->info.channels; |
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220 | uint16_t pkglen_net, pkglen; |
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221 | unsigned char cbits[BS+2]; |
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222 | |
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223 | if ( !self->opened ) { |
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224 | if ( stream_vio_s_write(self->stream, ROAR_CELT_MAGIC, ROAR_CELT_MAGIC_LEN) != ROAR_CELT_MAGIC_LEN ) |
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225 | return -1; |
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226 | self->opened = 1; |
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227 | } |
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228 | |
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229 | if ( (self->fo_rest + len) > fs2 ) { |
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230 | if ( self->fo_rest ) { |
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231 | memcpy(self->obuf, self->o_rest, self->fo_rest); |
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232 | have = self->fo_rest; |
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233 | self->fo_rest = 0; |
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234 | } |
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235 | |
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236 | memcpy(self->obuf+have, buf, (diff=fs2-have)); |
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237 | buf += diff; |
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238 | len -= diff; |
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239 | |
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240 | pkglen = celt_encode(self->encoder, (celt_int16_t *) self->obuf, NULL, cbits+2, BS); |
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241 | pkglen_net = ROAR_HOST2NET16(pkglen); |
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242 | *(uint16_t*)cbits = pkglen_net; |
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243 | |
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244 | if ( stream_vio_s_write(self->stream, cbits, pkglen+2) == -1 ) |
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245 | return -1; |
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246 | |
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247 | while (len >= fs2) { |
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248 | pkglen = celt_encode(self->encoder, (celt_int16_t *) buf, NULL, cbits+2, BS); |
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249 | pkglen_net = ROAR_HOST2NET16(pkglen); |
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250 | *(uint16_t*)cbits = pkglen_net; |
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251 | |
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252 | if ( stream_vio_s_write(self->stream, cbits, pkglen+2) == -1 ) |
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253 | return -1; |
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254 | len -= fs2; |
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255 | buf += fs2; |
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256 | } |
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257 | } |
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258 | |
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259 | if ( len ) { |
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260 | memcpy(self->o_rest + self->fo_rest, buf, len); |
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261 | self->fo_rest += len; |
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262 | len = 0; |
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263 | } |
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264 | |
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265 | return org_len; |
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266 | } |
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267 | |
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268 | #endif |
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269 | //ll |
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