1 | //codecfilter_flac.c: |
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2 | |
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3 | /* |
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4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2010 |
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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, 51 Franklin Street, Fifth Floor, |
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22 | * Boston, MA 02110-1301, USA. |
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23 | * |
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24 | */ |
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25 | |
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26 | #include "roard.h" |
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27 | #include <roaraudio/units.h> |
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28 | |
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29 | #ifdef ROAR_HAVE_LIBFLAC |
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30 | |
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31 | FLAC__StreamDecoderReadStatus cf_flac_cb_read(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], unsigned *bytes, void *client_data) { |
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32 | struct codecfilter_flac_inst * self = client_data; |
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33 | ssize_t ret; |
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34 | |
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35 | ROAR_DBG("cf_flac_cb_read(decoder=%p, buffer=%p, bytes=%p{%u}, client_data=%p) = ?", decoder, buffer, bytes, *bytes, client_data); |
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36 | |
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37 | ret = stream_vio_s_read(self->ss, buffer, *bytes); |
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38 | |
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39 | self->decoder.readret = ret; |
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40 | |
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41 | self->decoder.readc++; |
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42 | |
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43 | if (ret == -1) { |
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44 | *bytes = 0; |
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45 | ROAR_DBG("cf_flac_cb_read(decoder=%p, buffer=%p, bytes=%p{%u}, client_data=%p) = FLAC__STREAM_DECODER_READ_STATUS_ABORT", decoder, buffer, bytes, *bytes, client_data); |
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46 | return FLAC__STREAM_DECODER_READ_STATUS_ABORT; |
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47 | } else { |
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48 | *bytes = ret; |
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49 | |
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50 | if ( ret == 0 && self->decoder.readc == 1 ) { |
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51 | ROAR_DBG("cf_flac_cb_read(decoder=%p, buffer=%p, bytes=%p{%u}, client_data=%p) = FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM", decoder, buffer, bytes, *bytes, client_data); |
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52 | return FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM; |
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53 | } |
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54 | ROAR_DBG("cf_flac_cb_read(decoder=%p, buffer=%p, bytes=%p{%u}, client_data=%p) = FLAC__STREAM_DECODER_READ_STATUS_CONTINUE", decoder, buffer, bytes, *bytes, client_data); |
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55 | return FLAC__STREAM_DECODER_READ_STATUS_CONTINUE; |
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56 | } |
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57 | } |
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58 | |
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59 | FLAC__StreamDecoderWriteStatus cf_flac_cb_write(const FLAC__StreamDecoder * decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data) { |
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60 | struct codecfilter_flac_inst * self = client_data; |
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61 | struct roar_buffer * buf; |
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62 | struct roar_interleave is; |
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63 | size_t buflen = _32BIT * frame->header.blocksize * frame->header.channels; |
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64 | void * bufdata; |
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65 | int32_t * c; |
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66 | size_t i; |
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67 | int32_t shift = 32 - frame->header.bits_per_sample; |
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68 | |
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69 | ROAR_DBG("cf_flac_cb_write(decoder=%p, frame=%p, buffer=%p, client_data=%p) = ?", decoder, frame, buffer, client_data); |
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70 | |
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71 | if ( roar_interl_init(&is, frame->header.channels, 32) == -1 ) { |
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72 | ROAR_DBG("cf_flac_cb_write(decoder=%p, frame=%p, buffer=%p, client_data=%p) = FLAC__STREAM_DECODER_WRITE_STATUS_ABORT", decoder, frame, buffer, client_data); |
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73 | return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT; |
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74 | } |
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75 | |
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76 | if ( roar_buffer_new_data(&buf, buflen, &bufdata) == -1 ) { |
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77 | ROAR_DBG("cf_flac_cb_write(decoder=%p, frame=%p, buffer=%p, client_data=%p) = FLAC__STREAM_DECODER_WRITE_STATUS_ABORT", decoder, frame, buffer, client_data); |
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78 | return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT; |
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79 | } |
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80 | |
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81 | roar_interl_encode_ext(&is, (void**)buffer, bufdata, buflen); |
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82 | |
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83 | roar_interl_uninit(&is); |
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84 | |
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85 | if ( shift ) { |
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86 | buflen /= 4; |
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87 | for (c = bufdata, i = 0; i < buflen; i++) { |
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88 | c[i] <<= shift; |
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89 | } |
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90 | } |
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91 | |
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92 | if ( self->decoder.written == NULL ) { |
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93 | self->decoder.written = buf; |
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94 | } else { |
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95 | roar_buffer_add(self->decoder.written, buf); |
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96 | } |
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97 | |
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98 | ROAR_DBG("cf_flac_cb_write(decoder=%p, frame=%p, buffer=%p, client_data=%p) = FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE", decoder, frame, buffer, client_data); |
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99 | |
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100 | return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE; |
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101 | } |
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102 | |
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103 | void cf_flac_cb_metadata(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data) { |
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104 | ROAR_DBG("cf_flac_cb_metadata(decoder=%p, metadata=%p, client_data=%p) = (void)", decoder, metadata, client_data); |
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105 | } |
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106 | |
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107 | void cf_flac_cb_error(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data) { |
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108 | ROAR_DBG("cf_flac_cb_error(decoder=%p, status=%i, client_data=%p) = (void)", decoder, (int)status, client_data); |
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109 | } |
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110 | |
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111 | int cf_flac_open(CODECFILTER_USERDATA_T * inst, int codec, |
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112 | struct roar_stream_server * info, |
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113 | struct roar_codecfilter * filter) { |
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114 | struct codecfilter_flac_inst * self; |
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115 | |
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116 | if ( ROAR_STREAM(info)->dir != ROAR_DIR_PLAY ) |
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117 | return -1; |
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118 | |
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119 | self = roar_mm_malloc(sizeof(struct codecfilter_flac_inst)); |
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120 | |
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121 | if (self == NULL) |
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122 | return -1; |
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123 | |
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124 | memset(self, 0, sizeof(struct codecfilter_flac_inst)); |
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125 | |
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126 | self->ss = info; |
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127 | |
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128 | self->decoder.decoder = FLAC__stream_decoder_new(); |
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129 | |
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130 | if ( self->decoder.decoder == NULL ) { |
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131 | roar_mm_free(self); |
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132 | return -1; |
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133 | } |
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134 | |
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135 | FLAC__stream_decoder_set_read_callback(self->decoder.decoder, cf_flac_cb_read); |
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136 | FLAC__stream_decoder_set_write_callback(self->decoder.decoder, cf_flac_cb_write); |
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137 | FLAC__stream_decoder_set_metadata_callback(self->decoder.decoder, cf_flac_cb_metadata); |
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138 | FLAC__stream_decoder_set_error_callback(self->decoder.decoder, cf_flac_cb_error); |
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139 | FLAC__stream_decoder_set_client_data(self->decoder.decoder, self); |
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140 | |
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141 | FLAC__stream_decoder_init(self->decoder.decoder); |
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142 | |
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143 | *inst = self; |
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144 | |
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145 | return 0; |
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146 | } |
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147 | |
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148 | int cf_flac_close(CODECFILTER_USERDATA_T inst) { |
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149 | struct codecfilter_flac_inst * self = inst; |
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150 | |
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151 | if ( self->decoder.decoder != NULL ) { |
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152 | FLAC__stream_decoder_delete(self->decoder.decoder); |
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153 | } |
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154 | |
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155 | roar_mm_free(self); |
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156 | |
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157 | return 0; |
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158 | } |
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159 | |
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160 | int cf_flac_write(CODECFILTER_USERDATA_T inst, char * buf, int len); |
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161 | |
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162 | int cf_flac_read(CODECFILTER_USERDATA_T inst, char * buf, int len) { |
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163 | struct codecfilter_flac_inst * self = inst; |
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164 | struct roar_audio_info * info = &(ROAR_STREAM(self->ss)->info); |
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165 | struct roar_buffer_stats stats; |
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166 | size_t ret; |
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167 | FLAC__StreamDecoderState state; |
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168 | |
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169 | if ( self->decoder.written == NULL ) { |
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170 | stats.bytes = 0; |
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171 | } else { |
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172 | roar_buffer_ring_stats(self->decoder.written, &stats); |
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173 | } |
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174 | |
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175 | self->decoder.readret = 1; |
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176 | self->decoder.readc = 0; |
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177 | |
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178 | while ( self->decoder.readret > 0 && stats.bytes < len ) { |
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179 | if ( !FLAC__stream_decoder_process_single(self->decoder.decoder) ) { |
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180 | break; |
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181 | } |
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182 | |
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183 | state = FLAC__stream_decoder_get_state(self->decoder.decoder); |
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184 | |
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185 | if ( state == FLAC__STREAM_DECODER_END_OF_STREAM ) |
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186 | break; |
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187 | |
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188 | if ( self->decoder.written == NULL && state == FLAC__STREAM_DECODER_READ_FRAME ) { |
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189 | return -1; |
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190 | } |
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191 | |
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192 | roar_buffer_ring_stats(self->decoder.written, &stats); |
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193 | } |
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194 | |
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195 | if ( stats.bytes ) { |
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196 | ret = len; |
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197 | |
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198 | if ( roar_buffer_shift_out(&(self->decoder.written), buf, &ret) == -1 ) { |
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199 | return -1; |
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200 | } |
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201 | |
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202 | info->codec = ROAR_CODEC_DEFAULT; |
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203 | info->bits = 32; |
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204 | info->channels = FLAC__stream_decoder_get_channels(self->decoder.decoder); |
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205 | info->rate = FLAC__stream_decoder_get_sample_rate(self->decoder.decoder); |
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206 | |
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207 | return ret; |
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208 | } else { |
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209 | return self->decoder.readret == -1 ? -1 : 0; |
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210 | } |
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211 | } |
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212 | |
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213 | int cf_flac_ctl(CODECFILTER_USERDATA_T inst, int cmd, void * data); |
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214 | |
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215 | #endif |
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216 | |
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217 | //ll |
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