1 | /* |
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2 | * QEMU WAV audio driver |
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3 | * |
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4 | * Copyright (c) 2004-2005 Vassili Karpov (malc) |
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5 | * |
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6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
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7 | * of this software and associated documentation files (the "Software"), to deal |
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8 | * in the Software without restriction, including without limitation the rights |
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9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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10 | * copies of the Software, and to permit persons to whom the Software is |
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11 | * furnished to do so, subject to the following conditions: |
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12 | * |
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13 | * The above copyright notice and this permission notice shall be included in |
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14 | * all copies or substantial portions of the Software. |
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15 | * |
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16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
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22 | * THE SOFTWARE. |
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23 | */ |
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24 | #include "vl.h" |
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25 | |
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26 | #define AUDIO_CAP "wav" |
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27 | #include "audio_int.h" |
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28 | |
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29 | typedef struct WAVVoiceOut { |
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30 | HWVoiceOut hw; |
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31 | QEMUFile *f; |
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32 | int64_t old_ticks; |
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33 | void *pcm_buf; |
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34 | int total_samples; |
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35 | } WAVVoiceOut; |
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36 | |
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37 | static struct { |
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38 | audsettings_t settings; |
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39 | const char *wav_path; |
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40 | } conf = { |
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41 | { |
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42 | 44100, |
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43 | 2, |
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44 | AUD_FMT_S16 |
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45 | }, |
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46 | "qemu.wav" |
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47 | }; |
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48 | |
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49 | static int wav_run_out (HWVoiceOut *hw) |
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50 | { |
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51 | WAVVoiceOut *wav = (WAVVoiceOut *) hw; |
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52 | int rpos, live, decr, samples; |
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53 | uint8_t *dst; |
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54 | st_sample_t *src; |
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55 | int64_t now = qemu_get_clock (vm_clock); |
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56 | int64_t ticks = now - wav->old_ticks; |
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57 | int64_t bytes = (ticks * hw->info.bytes_per_second) / ticks_per_sec; |
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58 | |
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59 | if (bytes > INT_MAX) { |
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60 | samples = INT_MAX >> hw->info.shift; |
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61 | } |
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62 | else { |
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63 | samples = bytes >> hw->info.shift; |
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64 | } |
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65 | |
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66 | live = audio_pcm_hw_get_live_out (hw); |
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67 | if (!live) { |
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68 | return 0; |
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69 | } |
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70 | |
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71 | wav->old_ticks = now; |
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72 | decr = audio_MIN (live, samples); |
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73 | samples = decr; |
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74 | rpos = hw->rpos; |
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75 | while (samples) { |
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76 | int left_till_end_samples = hw->samples - rpos; |
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77 | int convert_samples = audio_MIN (samples, left_till_end_samples); |
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78 | |
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79 | src = hw->mix_buf + rpos; |
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80 | dst = advance (wav->pcm_buf, rpos << hw->info.shift); |
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81 | |
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82 | hw->clip (dst, src, convert_samples); |
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83 | qemu_put_buffer (wav->f, dst, convert_samples << hw->info.shift); |
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84 | |
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85 | rpos = (rpos + convert_samples) % hw->samples; |
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86 | samples -= convert_samples; |
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87 | wav->total_samples += convert_samples; |
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88 | } |
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89 | |
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90 | hw->rpos = rpos; |
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91 | return decr; |
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92 | } |
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93 | |
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94 | static int wav_write_out (SWVoiceOut *sw, void *buf, int len) |
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95 | { |
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96 | return audio_pcm_sw_write (sw, buf, len); |
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97 | } |
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98 | |
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99 | /* VICE code: Store number as little endian. */ |
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100 | static void le_store (uint8_t *buf, uint32_t val, int len) |
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101 | { |
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102 | int i; |
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103 | for (i = 0; i < len; i++) { |
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104 | buf[i] = (uint8_t) (val & 0xff); |
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105 | val >>= 8; |
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106 | } |
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107 | } |
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108 | |
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109 | static int wav_init_out (HWVoiceOut *hw, audsettings_t *as) |
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110 | { |
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111 | WAVVoiceOut *wav = (WAVVoiceOut *) hw; |
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112 | int bits16 = 0, stereo = 0; |
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113 | uint8_t hdr[] = { |
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114 | 0x52, 0x49, 0x46, 0x46, 0x00, 0x00, 0x00, 0x00, 0x57, 0x41, 0x56, |
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115 | 0x45, 0x66, 0x6d, 0x74, 0x20, 0x10, 0x00, 0x00, 0x00, 0x01, 0x00, |
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116 | 0x02, 0x00, 0x44, 0xac, 0x00, 0x00, 0x10, 0xb1, 0x02, 0x00, 0x04, |
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117 | 0x00, 0x10, 0x00, 0x64, 0x61, 0x74, 0x61, 0x00, 0x00, 0x00, 0x00 |
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118 | }; |
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119 | audsettings_t wav_as = conf.settings; |
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120 | |
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121 | (void) as; |
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122 | |
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123 | stereo = wav_as.nchannels == 2; |
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124 | switch (wav_as.fmt) { |
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125 | case AUD_FMT_S8: |
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126 | case AUD_FMT_U8: |
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127 | bits16 = 0; |
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128 | break; |
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129 | |
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130 | case AUD_FMT_S16: |
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131 | case AUD_FMT_U16: |
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132 | bits16 = 1; |
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133 | break; |
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134 | } |
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135 | |
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136 | hdr[34] = bits16 ? 0x10 : 0x08; |
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137 | |
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138 | wav_as.endianness = 0; |
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139 | audio_pcm_init_info (&hw->info, &wav_as); |
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140 | |
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141 | hw->samples = 1024; |
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142 | wav->pcm_buf = audio_calloc (AUDIO_FUNC, hw->samples, 1 << hw->info.shift); |
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143 | if (!wav->pcm_buf) { |
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144 | dolog ("Could not allocate buffer (%d bytes)\n", |
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145 | hw->samples << hw->info.shift); |
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146 | return -1; |
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147 | } |
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148 | |
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149 | le_store (hdr + 22, hw->info.nchannels, 2); |
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150 | le_store (hdr + 24, hw->info.freq, 4); |
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151 | le_store (hdr + 28, hw->info.freq << (bits16 + stereo), 4); |
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152 | le_store (hdr + 32, 1 << (bits16 + stereo), 2); |
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153 | |
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154 | wav->f = fopen (conf.wav_path, "wb"); |
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155 | if (!wav->f) { |
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156 | dolog ("Failed to open wave file `%s'\nReason: %s\n", |
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157 | conf.wav_path, strerror (errno)); |
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158 | qemu_free (wav->pcm_buf); |
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159 | wav->pcm_buf = NULL; |
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160 | return -1; |
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161 | } |
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162 | |
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163 | qemu_put_buffer (wav->f, hdr, sizeof (hdr)); |
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164 | return 0; |
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165 | } |
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166 | |
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167 | static void wav_fini_out (HWVoiceOut *hw) |
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168 | { |
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169 | WAVVoiceOut *wav = (WAVVoiceOut *) hw; |
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170 | uint8_t rlen[4]; |
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171 | uint8_t dlen[4]; |
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172 | uint32_t datalen = wav->total_samples << hw->info.shift; |
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173 | uint32_t rifflen = datalen + 36; |
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174 | |
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175 | if (!wav->f) { |
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176 | return; |
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177 | } |
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178 | |
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179 | le_store (rlen, rifflen, 4); |
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180 | le_store (dlen, datalen, 4); |
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181 | |
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182 | qemu_fseek (wav->f, 4, SEEK_SET); |
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183 | qemu_put_buffer (wav->f, rlen, 4); |
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184 | |
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185 | qemu_fseek (wav->f, 32, SEEK_CUR); |
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186 | qemu_put_buffer (wav->f, dlen, 4); |
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187 | |
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188 | fclose (wav->f); |
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189 | wav->f = NULL; |
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190 | |
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191 | qemu_free (wav->pcm_buf); |
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192 | wav->pcm_buf = NULL; |
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193 | } |
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194 | |
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195 | static int wav_ctl_out (HWVoiceOut *hw, int cmd, ...) |
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196 | { |
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197 | (void) hw; |
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198 | (void) cmd; |
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199 | return 0; |
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200 | } |
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201 | |
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202 | static void *wav_audio_init (void) |
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203 | { |
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204 | return &conf; |
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205 | } |
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206 | |
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207 | static void wav_audio_fini (void *opaque) |
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208 | { |
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209 | (void) opaque; |
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210 | ldebug ("wav_fini"); |
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211 | } |
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212 | |
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213 | struct audio_option wav_options[] = { |
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214 | {"FREQUENCY", AUD_OPT_INT, &conf.settings.freq, |
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215 | "Frequency", NULL, 0}, |
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216 | |
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217 | {"FORMAT", AUD_OPT_FMT, &conf.settings.fmt, |
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218 | "Format", NULL, 0}, |
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219 | |
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220 | {"DAC_FIXED_CHANNELS", AUD_OPT_INT, &conf.settings.nchannels, |
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221 | "Number of channels (1 - mono, 2 - stereo)", NULL, 0}, |
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222 | |
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223 | {"PATH", AUD_OPT_STR, &conf.wav_path, |
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224 | "Path to wave file", NULL, 0}, |
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225 | {NULL, 0, NULL, NULL, NULL, 0} |
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226 | }; |
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227 | |
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228 | struct audio_pcm_ops wav_pcm_ops = { |
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229 | wav_init_out, |
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230 | wav_fini_out, |
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231 | wav_run_out, |
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232 | wav_write_out, |
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233 | wav_ctl_out, |
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234 | |
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235 | NULL, |
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236 | NULL, |
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237 | NULL, |
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238 | NULL, |
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239 | NULL |
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240 | }; |
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241 | |
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242 | struct audio_driver wav_audio_driver = { |
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243 | INIT_FIELD (name = ) "wav", |
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244 | INIT_FIELD (descr = ) |
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245 | "WAV renderer http://wikipedia.org/wiki/WAV", |
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246 | INIT_FIELD (options = ) wav_options, |
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247 | INIT_FIELD (init = ) wav_audio_init, |
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248 | INIT_FIELD (fini = ) wav_audio_fini, |
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249 | INIT_FIELD (pcm_ops = ) &wav_pcm_ops, |
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250 | INIT_FIELD (can_be_default = ) 0, |
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251 | INIT_FIELD (max_voices_out = ) 1, |
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252 | INIT_FIELD (max_voices_in = ) 0, |
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253 | INIT_FIELD (voice_size_out = ) sizeof (WAVVoiceOut), |
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254 | INIT_FIELD (voice_size_in = ) 0 |
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255 | }; |
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