1 | //transcode.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 | #define _FUNC(func) (state->entry->func) |
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28 | #define _CHECK_STATE() (!(state == NULL || state->entry == NULL)) |
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29 | #define _CHECK_FUNC(func) (_CHECK_STATE() && _FUNC(func) != NULL) |
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30 | #define _CHECK_BASIC(func) if ( !_CHECK_FUNC(func) ) return -1 |
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31 | #define _CHECK() if ( !_CHECK_STATE() ) return -1 |
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32 | |
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33 | static struct roar_xcoder_entry g_xcoders[] = { |
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34 | {ROAR_CODEC_ALAW, roar_xcoder_dummy_inituninit, roar_xcoder_dummy_inituninit, roar_xcoder_dummy_packet_size_any, |
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35 | roar_xcoder_alaw_encode, roar_xcoder_alaw_decode}, |
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36 | {ROAR_CODEC_MULAW, roar_xcoder_dummy_inituninit, roar_xcoder_dummy_inituninit, roar_xcoder_dummy_packet_size_any, |
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37 | roar_xcoder_mulaw_encode, roar_xcoder_mulaw_decode}, |
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38 | #ifdef ROAR_HAVE_LIBCELT |
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39 | {ROAR_CODEC_ROAR_CELT, roar_xcoder_celt_init, roar_xcoder_celt_uninit, roar_xcoder_celt_packet_size, |
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40 | roar_xcoder_celt_encode, roar_xcoder_celt_decode}, |
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41 | #endif |
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42 | #ifdef ROAR_HAVE_LIBSPEEX |
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43 | {ROAR_CODEC_ROAR_SPEEX, roar_xcoder_speex_init, roar_xcoder_speex_uninit, roar_xcoder_speex_packet_size, |
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44 | roar_xcoder_speex_encode, roar_xcoder_speex_decode}, |
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45 | #endif |
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46 | {-1, NULL, NULL, NULL, NULL, NULL} |
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47 | }; |
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48 | |
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49 | int roar_xcoder_init(struct roar_xcoder * state, int encoder, struct roar_audio_info * info, struct roar_vio_calls * vio) { |
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50 | int i; |
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51 | |
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52 | if ( state == NULL || info == NULL ) |
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53 | return -1; |
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54 | |
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55 | memset(state, 0, sizeof(struct roar_xcoder)); |
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56 | |
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57 | for (i = 0; g_xcoders[i].codec != -1; i++) { |
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58 | if ( g_xcoders[i].codec == info->codec ) { |
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59 | state->entry = &(g_xcoders[i]); |
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60 | break; |
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61 | } |
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62 | } |
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63 | |
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64 | if ( state->entry == NULL ) |
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65 | return -1; |
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66 | |
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67 | state->stage = ROAR_XCODER_STAGE_NONE; |
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68 | state->encode = encoder; |
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69 | state->packet_len = -1; |
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70 | |
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71 | if ( roar_xcoder_set_backend(state, vio) == -1 ) |
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72 | return -1; |
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73 | |
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74 | memcpy(&(state->info.coded), info, sizeof(struct roar_audio_info)); |
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75 | memcpy(&(state->info.pcm ), info, sizeof(struct roar_audio_info)); |
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76 | |
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77 | state->info.pcm.codec = ROAR_CODEC_DEFAULT; |
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78 | |
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79 | if ( _FUNC(init) == NULL ) |
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80 | return -1; |
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81 | |
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82 | if ( _FUNC(init)(state) != 0 ) |
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83 | return -1; |
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84 | |
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85 | state->stage = ROAR_XCODER_STAGE_INITED; |
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86 | |
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87 | return 0; |
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88 | } |
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89 | |
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90 | int roar_xcoder_set_backend(struct roar_xcoder * state, struct roar_vio_calls * vio) { |
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91 | _CHECK(); |
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92 | |
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93 | if ( vio == NULL && state->backend != NULL ) |
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94 | return -1; |
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95 | |
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96 | state->backend = vio; |
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97 | |
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98 | return 0; |
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99 | } |
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100 | int roar_xcoder_packet_size(struct roar_xcoder * state, int samples) { |
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101 | _CHECK_BASIC(packet_size); |
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102 | |
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103 | state->packet_len = state->entry->packet_size(state, samples); |
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104 | |
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105 | if ( state->packet_len == 0 ) { |
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106 | if ( samples < 1 ) { |
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107 | return ROAR_RATE_DEFAULT/100; |
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108 | } else { |
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109 | return samples; |
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110 | } |
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111 | } |
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112 | |
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113 | return state->packet_len; |
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114 | } |
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115 | |
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116 | int roar_xcoder_close (struct roar_xcoder * state) { |
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117 | _CHECK_BASIC(uninit); |
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118 | |
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119 | |
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120 | if ( state->iobuffer != NULL ) { |
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121 | roar_xcoder_proc(state, NULL, 0); // try to flush |
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122 | roar_buffer_free(state->iobuffer); |
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123 | } |
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124 | |
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125 | return _FUNC(uninit)(state); |
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126 | } |
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127 | |
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128 | int roar_xcoder_proc_packet(struct roar_xcoder * state, void * buf, size_t len) { |
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129 | _CHECK(); |
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130 | |
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131 | ROAR_DBG("roar_xcoder_proc_packet(state=%p, buf=%p, len=%lu) = ?", state, buf, (unsigned long)len); |
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132 | |
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133 | if ( state->backend == NULL ) |
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134 | return -1; |
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135 | |
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136 | if ( state->packet_len > 0 && state->packet_len != len ) |
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137 | return -1; |
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138 | |
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139 | ROAR_DBG("roar_xcoder_proc_packet(state=%p, buf=%p, len=%lu) = ?", state, buf, (unsigned long)len); |
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140 | |
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141 | if ( state->encode ) { |
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142 | _CHECK_BASIC(encode); |
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143 | ROAR_DBG("roar_xcoder_proc_packet(state=%p, buf=%p, len=%lu) = ? // _CHECK_BASIC(encode) -> OK", state, buf, (unsigned long)len); |
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144 | return _FUNC(encode)(state, buf, len); |
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145 | } else { |
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146 | _CHECK_BASIC(decode); |
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147 | ROAR_DBG("roar_xcoder_proc_packet(state=%p, buf=%p, len=%lu) = ? // _CHECK_BASIC(decode) -> OK", state, buf, (unsigned long)len); |
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148 | return _FUNC(decode)(state, buf, len); |
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149 | } |
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150 | } |
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151 | |
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152 | int roar_xcoder_proc (struct roar_xcoder * state, void * buf, size_t len) { |
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153 | struct roar_buffer_stats ringstats; |
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154 | struct roar_buffer * bufbuf; |
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155 | void * bufdata; |
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156 | size_t curlen; |
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157 | |
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158 | ROAR_DBG("roar_xcoder_proc(state=%p, buf=%p, len=%lu) = ?", state, buf, (unsigned long)len); |
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159 | |
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160 | if ( state == NULL ) |
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161 | return -1; |
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162 | |
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163 | if ( buf == NULL && len != 0 ) |
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164 | return -1; |
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165 | |
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166 | if ( state->packet_len == -1 ) |
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167 | if ( roar_xcoder_packet_size(state, -1) == -1 ) |
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168 | return -1; |
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169 | |
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170 | ROAR_DBG("roar_xcoder_proc(state=%p, buf=%p, len=%lu) = ?", state, buf, (unsigned long)len); |
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171 | |
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172 | if ( state->packet_len == 0 ) |
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173 | return roar_xcoder_proc_packet(state, buf, len); |
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174 | |
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175 | ROAR_DBG("roar_xcoder_proc(state=%p, buf=%p, len=%lu): state->packet_len=%li", state, buf, (unsigned long)len, (long int) state->packet_len); |
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176 | |
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177 | if ( state->iobuffer == NULL ) { |
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178 | while ( len >= state->packet_len ) { |
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179 | if ( roar_xcoder_proc_packet(state, buf, state->packet_len) == -1 ) { |
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180 | ROAR_DBG("roar_xcoder_proc(state=%p, buf=%p, len=%lu) = -1 // roar_xcoder_proc_packet() error", state, buf, (unsigned long)len); |
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181 | return -1; |
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182 | } |
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183 | |
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184 | buf += state->packet_len; |
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185 | len -= state->packet_len; |
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186 | } |
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187 | |
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188 | if ( !len ) { |
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189 | ROAR_DBG("roar_xcoder_proc(state=%p, buf=%p, len=%lu) = 0", state, buf, (unsigned long)len); |
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190 | return 0; |
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191 | } |
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192 | |
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193 | ROAR_DBG("roar_xcoder_proc(state=%p, buf=%p, len=%lu) = ?", state, buf, (unsigned long)len); |
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194 | |
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195 | if ( state->encode ) { |
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196 | curlen = len; |
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197 | } else { |
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198 | curlen = state->packet_len; |
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199 | } |
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200 | |
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201 | if ( roar_buffer_new(&bufbuf, curlen) == -1 ) |
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202 | return -1; |
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203 | |
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204 | if ( roar_buffer_get_data(bufbuf, &bufdata) == -1 ) { |
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205 | roar_buffer_free(bufbuf); |
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206 | return -1; |
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207 | } |
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208 | |
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209 | if ( state->encode ) { |
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210 | memcpy(bufdata, buf, len); |
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211 | } else { |
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212 | if ( roar_xcoder_proc_packet(state, bufdata, state->packet_len) == -1 ) { |
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213 | roar_buffer_free(bufbuf); |
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214 | return -1; |
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215 | } |
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216 | |
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217 | curlen = len; |
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218 | |
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219 | if ( roar_buffer_shift_out(&bufbuf, buf, &curlen) == -1 ) { |
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220 | roar_buffer_free(bufbuf); |
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221 | return -1; |
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222 | } |
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223 | |
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224 | if ( curlen < len ) { // this should never happen! |
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225 | roar_buffer_free(bufbuf); |
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226 | return -1; |
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227 | } |
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228 | } |
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229 | |
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230 | state->iobuffer = bufbuf; |
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231 | } else { |
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232 | if ( state->encode ) { |
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233 | if ( roar_buffer_new(&bufbuf, len) == -1 ) |
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234 | return -1; |
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235 | |
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236 | if ( roar_buffer_get_data(bufbuf, &bufdata) == -1 ) { |
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237 | roar_buffer_free(bufbuf); |
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238 | return -1; |
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239 | } |
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240 | |
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241 | memcpy(bufdata, buf, len); |
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242 | |
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243 | if ( roar_buffer_add(state->iobuffer, bufbuf) == -1 ) { |
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244 | roar_buffer_free(bufbuf); |
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245 | return -1; |
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246 | } |
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247 | |
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248 | if ( roar_buffer_ring_stats(state->iobuffer, &ringstats) == -1 ) |
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249 | return -1; |
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250 | |
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251 | if ( roar_buffer_new(&bufbuf, state->packet_len) == -1 ) |
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252 | return -1; |
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253 | |
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254 | if ( roar_buffer_get_data(bufbuf, &bufdata) == -1 ) { |
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255 | roar_buffer_free(bufbuf); |
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256 | return -1; |
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257 | } |
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258 | |
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259 | while ( ringstats.bytes > state->packet_len ) { |
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260 | curlen = state->packet_len; |
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261 | if ( roar_buffer_shift_out(&(state->iobuffer), bufdata, &curlen) == -1 ) { |
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262 | roar_buffer_free(bufbuf); |
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263 | return -1; |
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264 | } |
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265 | |
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266 | if ( curlen < state->packet_len ) { // this should not happen... |
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267 | roar_buffer_free(bufbuf); |
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268 | return -1; |
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269 | } |
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270 | |
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271 | if ( roar_xcoder_proc_packet(state, bufdata, state->packet_len) == -1 ) { |
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272 | roar_buffer_free(bufbuf); |
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273 | return -1; |
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274 | } |
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275 | |
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276 | if ( roar_buffer_ring_stats(state->iobuffer, &ringstats) == -1 ) { |
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277 | roar_buffer_free(bufbuf); |
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278 | return -1; |
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279 | } |
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280 | } |
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281 | |
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282 | if ( roar_buffer_free(bufbuf) == -1 ) |
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283 | return -1; |
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284 | } else { |
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285 | curlen = len; |
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286 | |
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287 | if ( roar_buffer_shift_out(&(state->iobuffer), buf, &curlen) == -1 ) { |
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288 | return -1; |
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289 | } |
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290 | |
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291 | if ( curlen == len ) |
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292 | return -1; |
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293 | |
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294 | // we now have curlen < len and state->iobuffer == NULL |
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295 | // as no data is left in the buffer, need to get some new data. |
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296 | // we simply call ourself to get some more data... |
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297 | |
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298 | if ( state->iobuffer == NULL ) { |
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299 | ROAR_WARN("roar_xcoder_proc(state=%p, buf=%p, len=%lu): iobuffer != NULL, " |
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300 | "This is a bug in libroar{dsp,} or some hardware is broken", |
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301 | state, buf, (unsigned long)len); |
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302 | return -1; |
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303 | } |
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304 | |
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305 | len -= curlen; |
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306 | buf += curlen; |
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307 | |
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308 | return roar_xcoder_proc(state, buf, len); |
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309 | } |
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310 | } |
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311 | |
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312 | return 0; |
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313 | } |
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314 | |
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315 | int roar_bixcoder_init(struct roar_bixcoder * state, struct roar_audio_info * info, struct roar_vio_calls * vio) { |
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316 | if ( state == NULL || info == NULL || vio == NULL ) |
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317 | return -1; |
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318 | |
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319 | memset(state, 0, sizeof(struct roar_bixcoder)); |
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320 | |
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321 | if ( roar_xcoder_init(&(state->encoder), 1, info, vio) == -1 ) |
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322 | return -1; |
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323 | |
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324 | if ( roar_xcoder_init(&(state->decoder), 0, info, vio) == -1 ) { |
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325 | roar_xcoder_close(&(state->encoder)); |
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326 | return -1; |
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327 | } |
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328 | |
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329 | return 0; |
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330 | } |
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331 | |
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332 | int roar_bixcoder_packet_size (struct roar_bixcoder * state, int samples) { |
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333 | int ret; |
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334 | |
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335 | ROAR_DBG("roar_bixcoder_packet_size(state=%p, samples=%i) = ?", state, samples); |
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336 | |
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337 | if ( state == NULL ) |
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338 | return -1; |
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339 | |
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340 | if ( (ret = roar_xcoder_packet_size(&(state->encoder), samples)) == -1 ) |
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341 | return -1; |
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342 | |
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343 | ROAR_DBG("roar_bixcoder_packet_size(state=%p, samples=%i): ret=%i", state, samples, ret); |
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344 | |
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345 | // TODO: we need a lot hope here... |
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346 | /* |
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347 | if ( roar_xcoder_packet_size(&(state->decoder), ret) != ret ) |
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348 | return -1; |
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349 | */ |
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350 | |
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351 | ROAR_DBG("roar_bixcoder_packet_size(state=%p, samples=%i) = %i", state, samples, ret); |
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352 | return ret; |
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353 | } |
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354 | |
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355 | int roar_bixcoder_close (struct roar_bixcoder * state) { |
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356 | int ret = 0; |
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357 | |
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358 | if ( state == NULL ) |
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359 | return -1; |
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360 | |
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361 | ret = roar_xcoder_close(&(state->encoder)); |
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362 | |
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363 | if ( roar_xcoder_close(&(state->decoder)) == -1 ) |
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364 | return -1; |
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365 | |
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366 | return ret; |
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367 | } |
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368 | |
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369 | int roar_bixcoder_read_packet (struct roar_bixcoder * state, void * buf, size_t len) { |
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370 | |
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371 | ROAR_DBG("roar_bixcoder_read_packet(state=%p, buf=%p, len=%lu) = ?", state, buf, (unsigned long)len); |
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372 | |
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373 | if ( state == NULL ) |
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374 | return -1; |
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375 | |
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376 | return roar_xcoder_proc_packet(&(state->decoder), buf, len); |
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377 | } |
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378 | |
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379 | int roar_bixcoder_read (struct roar_bixcoder * state, void * buf, size_t len) { |
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380 | if ( state == NULL ) |
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381 | return -1; |
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382 | |
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383 | return roar_xcoder_proc(&(state->decoder), buf, len); |
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384 | } |
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385 | |
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386 | int roar_bixcoder_write_packet(struct roar_bixcoder * state, void * buf, size_t len) { |
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387 | if ( state == NULL ) |
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388 | return -1; |
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389 | |
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390 | return roar_xcoder_proc_packet(&(state->encoder), buf, len); |
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391 | } |
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392 | |
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393 | int roar_bixcoder_write (struct roar_bixcoder * state, void * buf, size_t len) { |
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394 | if ( state == NULL ) |
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395 | return -1; |
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396 | |
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397 | return roar_xcoder_proc(&(state->encoder), buf, len); |
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398 | } |
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399 | |
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400 | // dummy functions used by some de/encoders: |
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401 | int roar_xcoder_dummy_inituninit(struct roar_xcoder * state) { |
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402 | return 0; |
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403 | } |
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404 | |
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405 | int roar_xcoder_dummy_packet_size_any(struct roar_xcoder * state, int samples) { |
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406 | // the case samples=-1/samples!=-1 based things are done in the general func |
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407 | return 0; |
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408 | } |
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409 | |
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410 | //ll |
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