1 | //transcode_speex.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_LIBSPEEX |
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28 | |
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29 | #define _16BIT (16/8) |
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30 | #define _SIZE_LEN 2 |
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31 | |
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32 | #define _HAVE_CCFG(x) (self->codec_config != NULL && (self->codec_config->para_set & (x))) |
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33 | |
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34 | int roar_xcoder_speex_init (struct roar_xcoder * state) { |
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35 | struct roar_xcoder_speex * self = malloc(sizeof(struct roar_xcoder_speex)); |
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36 | struct roar_audio_info * info = &(state->info.pcm); |
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37 | int tmp; |
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38 | |
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39 | ROAR_DBG("roar_xcoder_speex_init(*): sizeof(*self) = %lu", (unsigned long)sizeof(*self)); |
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40 | |
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41 | if ( self == NULL ) |
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42 | return -1; |
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43 | |
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44 | // curruntly only 16 bit mode is supported |
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45 | if ( info->bits != 16 ) { |
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46 | free(self); |
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47 | return -1; |
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48 | } |
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49 | |
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50 | // only mono/stereo mode is supported |
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51 | switch (info->channels) { |
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52 | case 1: self->stereo = 0; break; |
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53 | case 2: self->stereo = 1; break; |
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54 | default: |
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55 | free(self); |
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56 | return -1; |
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57 | } |
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58 | |
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59 | memset(self, 0, sizeof(struct roar_xcoder_speex)); |
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60 | |
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61 | state->inst = self; |
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62 | |
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63 | self->mode = ROAR_SPEEX_MODE_UWB; |
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64 | |
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65 | if (state->encode) { |
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66 | self->codec_config = roar_libroar_config_codec_get(ROAR_CODEC_ROAR_SPEEX, 0); |
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67 | self->max_cc = ROAR_SPEEX_MAX_CC; |
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68 | |
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69 | ROAR_DBG("roar_xcoder_speex_init(*): self->codec_config=%p", self->codec_config); |
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70 | |
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71 | if ( _HAVE_CCFG(ROAR_LIBROAR_CONFIG_PSET_MAX_CC) ) { |
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72 | self->max_cc = self->codec_config->max_cc; |
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73 | } |
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74 | |
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75 | switch (self->mode) { |
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76 | case ROAR_SPEEX_MODE_NB: self->xcoder = speex_encoder_init(&speex_nb_mode); break; |
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77 | case ROAR_SPEEX_MODE_WB: self->xcoder = speex_encoder_init(&speex_wb_mode); break; |
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78 | case ROAR_SPEEX_MODE_UWB: self->xcoder = speex_encoder_init(&speex_uwb_mode); break; |
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79 | } |
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80 | |
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81 | if ( _HAVE_CCFG(ROAR_LIBROAR_CONFIG_PSET_COMPLEXITY) ) { |
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82 | tmp = self->codec_config->complexity / 256; |
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83 | } else { |
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84 | tmp = 8; |
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85 | } |
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86 | speex_encoder_ctl(self->xcoder, SPEEX_SET_QUALITY, &tmp); |
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87 | |
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88 | if ( _HAVE_CCFG(ROAR_LIBROAR_CONFIG_PSET_Q) ) { |
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89 | tmp = self->codec_config->q / 256; |
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90 | speex_encoder_ctl(self->xcoder, SPEEX_SET_QUALITY, &tmp); |
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91 | } |
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92 | |
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93 | if ( _HAVE_CCFG(ROAR_LIBROAR_CONFIG_PSET_VBR) ) { |
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94 | tmp = self->codec_config->vbr ? 1 : 0; |
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95 | speex_encoder_ctl(self->xcoder, SPEEX_SET_VBR, &tmp); |
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96 | } |
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97 | |
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98 | if ( _HAVE_CCFG(ROAR_LIBROAR_CONFIG_PSET_DTX) ) { |
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99 | tmp = self->codec_config->dtx ? 1 : 0; |
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100 | speex_encoder_ctl(self->xcoder, SPEEX_SET_DTX, &tmp); |
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101 | } |
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102 | |
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103 | tmp = info->rate; |
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104 | speex_encoder_ctl(self->xcoder, SPEEX_SET_SAMPLING_RATE, &tmp); |
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105 | speex_encoder_ctl(self->xcoder, SPEEX_GET_FRAME_SIZE, &(self->frame_size)); |
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106 | } else { |
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107 | self->xcoder = NULL; |
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108 | } |
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109 | |
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110 | speex_bits_init(&(self->bits)); |
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111 | |
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112 | return 0; |
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113 | } |
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114 | |
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115 | int roar_xcoder_speex_uninit (struct roar_xcoder * state) { |
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116 | struct roar_xcoder_speex * self = state->inst; |
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117 | |
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118 | if ( self->xcoder != NULL ) { |
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119 | if (state->encode) { |
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120 | speex_encoder_destroy(self->xcoder); |
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121 | } else { |
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122 | speex_decoder_destroy(self->xcoder); |
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123 | } |
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124 | } |
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125 | |
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126 | speex_bits_destroy(&(self->bits)); |
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127 | |
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128 | free(self); |
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129 | |
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130 | return 0; |
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131 | } |
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132 | |
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133 | int roar_xcoder_speex_packet_size(struct roar_xcoder * state, int samples) { |
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134 | struct roar_xcoder_speex * self = state->inst; |
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135 | |
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136 | if (!state->encode) |
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137 | if (state->stage != ROAR_XCODER_STAGE_OPENED) |
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138 | return -1; |
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139 | |
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140 | return _16BIT * self->frame_size * (self->stereo ? 2 : 1); |
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141 | } |
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142 | |
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143 | int roar_xcoder_speex_proc_header(struct roar_xcoder * state) { |
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144 | struct roar_xcoder_speex * self = state->inst; |
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145 | uint16_t tmp_net; |
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146 | int tmp; |
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147 | SpeexStereoState stereo = SPEEX_STEREO_STATE_INIT; |
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148 | SpeexCallback callback; |
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149 | char magic[ROAR_SPEEX_MAGIC_LEN]; |
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150 | |
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151 | // we do allready open streams not considder an error. |
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152 | if ( state->stage == ROAR_XCODER_STAGE_OPENED ) |
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153 | return 0; |
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154 | |
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155 | // everything else expected an INITED stream (OPENING, MAGIC,..) |
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156 | // is an error... |
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157 | if ( state->stage != ROAR_XCODER_STAGE_INITED ) |
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158 | return -1; |
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159 | |
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160 | if ( state->encode ) { |
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161 | if ( roar_vio_write(state->backend, ROAR_SPEEX_MAGIC, ROAR_SPEEX_MAGIC_LEN) != ROAR_SPEEX_MAGIC_LEN ) |
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162 | return -1; |
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163 | state->stage = ROAR_XCODER_STAGE_MAGIC; |
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164 | ROAR_DBG("roar_xcoder_speex_encode(*): Wrote MAGIC"); |
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165 | |
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166 | state->stage = ROAR_XCODER_STAGE_OPENING; |
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167 | |
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168 | tmp_net = ROAR_HOST2NET16(self->mode); |
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169 | if ( roar_vio_write(state->backend, &tmp_net, 2) != 2 ) |
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170 | return -1; |
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171 | |
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172 | state->stage = ROAR_XCODER_STAGE_OPENED; |
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173 | } else { |
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174 | ROAR_DBG("roar_xcoder_speex_decode(state=%p, buf=%p, len=%lu): state->stage = INITED", state, buf, (unsigned long)len); |
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175 | if ( roar_vio_read(state->backend, magic, ROAR_SPEEX_MAGIC_LEN) != ROAR_SPEEX_MAGIC_LEN ) |
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176 | return -1; |
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177 | |
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178 | if ( memcmp(magic, ROAR_SPEEX_MAGIC, ROAR_SPEEX_MAGIC_LEN) != 0 ) |
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179 | return -1; |
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180 | |
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181 | state->stage = ROAR_XCODER_STAGE_MAGIC; |
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182 | ROAR_DBG("roar_xcoder_speex_decode(state=%p, buf=%p, len=%lu): state->stage = MAGIC", state, buf, (unsigned long)len); |
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183 | |
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184 | if ( roar_vio_read(state->backend, &tmp_net, 2) != 2 ) |
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185 | return -1; |
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186 | |
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187 | self->mode = ROAR_NET2HOST16(tmp_net); |
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188 | |
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189 | state->stage = ROAR_XCODER_STAGE_OPENING; |
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190 | ROAR_DBG("roar_xcoder_speex_decode(state=%p, buf=%p, len=%lu): state->stage = OPENING", state, buf, (unsigned long)len); |
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191 | |
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192 | switch (self->mode) { |
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193 | case ROAR_SPEEX_MODE_NB: self->xcoder = speex_decoder_init(&speex_nb_mode); break; |
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194 | case ROAR_SPEEX_MODE_WB: self->xcoder = speex_decoder_init(&speex_wb_mode); break; |
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195 | case ROAR_SPEEX_MODE_UWB: self->xcoder = speex_decoder_init(&speex_uwb_mode); break; |
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196 | default: |
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197 | return -1; |
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198 | break; |
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199 | } |
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200 | |
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201 | ROAR_DBG("roar_xcoder_speex_decode(state=%p, buf=%p, len=%lu): opened decoder state", state, buf, (unsigned long)len); |
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202 | |
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203 | tmp=1; |
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204 | speex_decoder_ctl(self->xcoder, SPEEX_SET_ENH, &tmp); |
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205 | tmp = state->info.pcm.rate; |
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206 | speex_decoder_ctl(self->xcoder, SPEEX_SET_SAMPLING_RATE, &tmp); |
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207 | speex_decoder_ctl(self->xcoder, SPEEX_GET_FRAME_SIZE, &(self->frame_size)); |
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208 | |
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209 | ROAR_DBG("roar_xcoder_speex_decode(state=%p, buf=%p, len=%lu): self->stereo = %i", state, buf, (unsigned long)len, self->stereo); |
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210 | |
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211 | if ( self->stereo ) { |
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212 | memcpy(&(self->stereo_state), &stereo, sizeof(self->stereo_state)); |
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213 | |
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214 | callback.callback_id = SPEEX_INBAND_STEREO; |
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215 | callback.func = speex_std_stereo_request_handler; |
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216 | callback.data = &(self->stereo_state); |
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217 | |
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218 | speex_decoder_ctl(self->xcoder, SPEEX_SET_HANDLER, &callback); |
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219 | } |
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220 | |
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221 | state->stage = ROAR_XCODER_STAGE_OPENED; |
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222 | ROAR_DBG("roar_xcoder_speex_decode(state=%p, buf=%p, len=%lu): state->stage = OPENED", state, buf, (unsigned long)len); |
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223 | } |
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224 | |
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225 | // on no error... |
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226 | return 0; |
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227 | } |
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228 | |
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229 | int roar_xcoder_speex_encode (struct roar_xcoder * state, void * buf, size_t len) { |
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230 | struct roar_xcoder_speex * self = state->inst; |
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231 | int pkg_len; |
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232 | |
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233 | if (!state->encode) |
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234 | return -1; |
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235 | |
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236 | ROAR_DBG("roar_xcoder_speex_encode(*): Encoding..."); |
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237 | |
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238 | if ( state->stage == ROAR_XCODER_STAGE_INITED ) |
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239 | if ( roar_xcoder_speex_proc_header(state) == -1 ) |
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240 | return -1; |
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241 | |
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242 | speex_bits_reset(&(self->bits)); |
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243 | |
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244 | if ( self->stereo ) |
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245 | speex_encode_stereo_int((spx_int16_t *) buf, self->frame_size, &(self->bits)); |
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246 | |
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247 | speex_encode_int(self->xcoder, (spx_int16_t *) buf, &(self->bits)); |
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248 | |
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249 | pkg_len = speex_bits_write(&(self->bits), self->cc + 2, self->max_cc); |
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250 | |
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251 | *((uint16_t*)self->cc) = ROAR_HOST2NET16(pkg_len); |
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252 | |
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253 | if ( roar_vio_write(state->backend, self->cc, pkg_len + 2) != (pkg_len + 2) ) |
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254 | return -1; |
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255 | |
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256 | return 0; |
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257 | } |
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258 | |
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259 | // TODO: move all the init thingys into a seperate function |
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260 | int roar_xcoder_speex_decode (struct roar_xcoder * state, void * buf, size_t len) { |
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261 | struct roar_xcoder_speex * self = state->inst; |
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262 | uint16_t tmp_net; |
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263 | int pkg_len; |
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264 | |
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265 | ROAR_DBG("roar_xcoder_speex_decode(state=%p, buf=%p, len=%lu) = ?", state, buf, (unsigned long)len); |
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266 | |
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267 | if ( state->stage == ROAR_XCODER_STAGE_INITED ) |
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268 | if ( roar_xcoder_speex_proc_header(state) == -1 ) |
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269 | return -1; |
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270 | |
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271 | ROAR_DBG("roar_xcoder_speex_decode(state=%p, buf=%p, len=%lu): state->stage = %s", state, buf, (unsigned long)len, |
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272 | state->stage == ROAR_XCODER_STAGE_OPENED ? "OPENED" : "???" |
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273 | ); |
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274 | |
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275 | if ( roar_vio_read(state->backend, &tmp_net, 2) != 2 ) |
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276 | return -1; |
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277 | |
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278 | pkg_len = ROAR_NET2HOST16(tmp_net); |
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279 | |
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280 | if ( pkg_len > ROAR_SPEEX_MAX_CC ) |
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281 | return -1; |
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282 | |
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283 | ROAR_DBG("roar_xcoder_speex_decode(state=%p, buf=%p, len=%lu) = ?", state, buf, (unsigned long)len); |
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284 | |
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285 | if ( roar_vio_read(state->backend, self->cc, pkg_len) != pkg_len ) |
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286 | return -1; |
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287 | |
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288 | speex_bits_read_from(&(self->bits), self->cc, pkg_len); |
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289 | |
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290 | speex_decode_int(self->xcoder, &(self->bits), buf); |
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291 | |
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292 | if ( self->stereo ) { |
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293 | speex_decode_stereo_int(buf, self->frame_size, &(self->stereo_state)); |
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294 | } |
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295 | |
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296 | ROAR_DBG("roar_xcoder_speex_decode(state=%p, buf=%p, len=%lu) = 0", state, buf, (unsigned long)len); |
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297 | return 0; |
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298 | } |
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299 | |
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300 | #endif |
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301 | |
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302 | //ll |
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