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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 "hw/hw.h" |
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25 #include "qemu-timer.h" |
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26 #include "audio.h" |
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27 |
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28 #define AUDIO_CAP "wav" |
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29 #include "audio_int.h" |
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30 |
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31 typedef struct WAVVoiceOut { |
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32 HWVoiceOut hw; |
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33 QEMUFile *f; |
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34 int64_t old_ticks; |
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35 void *pcm_buf; |
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36 int total_samples; |
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37 } WAVVoiceOut; |
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38 |
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39 static struct { |
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40 struct audsettings settings; |
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41 const char *wav_path; |
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42 } conf = { |
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43 { |
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44 44100, |
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45 2, |
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46 AUD_FMT_S16, |
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47 0 |
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48 }, |
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49 "qemu.wav" |
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50 }; |
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51 |
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52 static int wav_run_out (HWVoiceOut *hw) |
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53 { |
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54 WAVVoiceOut *wav = (WAVVoiceOut *) hw; |
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55 int rpos, live, decr, samples; |
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56 uint8_t *dst; |
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57 struct st_sample *src; |
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58 int64_t now = qemu_get_clock (vm_clock); |
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59 int64_t ticks = now - wav->old_ticks; |
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60 int64_t bytes = (ticks * hw->info.bytes_per_second) / ticks_per_sec; |
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61 |
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62 if (bytes > INT_MAX) { |
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63 samples = INT_MAX >> hw->info.shift; |
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64 } |
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65 else { |
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66 samples = bytes >> hw->info.shift; |
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67 } |
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68 |
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69 live = audio_pcm_hw_get_live_out (hw); |
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70 if (!live) { |
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71 return 0; |
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72 } |
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73 |
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74 wav->old_ticks = now; |
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75 decr = audio_MIN (live, samples); |
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76 samples = decr; |
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77 rpos = hw->rpos; |
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78 while (samples) { |
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79 int left_till_end_samples = hw->samples - rpos; |
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80 int convert_samples = audio_MIN (samples, left_till_end_samples); |
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81 |
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82 src = hw->mix_buf + rpos; |
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83 dst = advance (wav->pcm_buf, rpos << hw->info.shift); |
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84 |
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85 hw->clip (dst, src, convert_samples); |
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86 qemu_put_buffer (wav->f, dst, convert_samples << hw->info.shift); |
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87 |
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88 rpos = (rpos + convert_samples) % hw->samples; |
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89 samples -= convert_samples; |
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90 wav->total_samples += convert_samples; |
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91 } |
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92 |
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93 hw->rpos = rpos; |
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94 return decr; |
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95 } |
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96 |
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97 static int wav_write_out (SWVoiceOut *sw, void *buf, int len) |
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98 { |
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99 return audio_pcm_sw_write (sw, buf, len); |
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100 } |
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101 |
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102 /* VICE code: Store number as little endian. */ |
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103 static void le_store (uint8_t *buf, uint32_t val, int len) |
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104 { |
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105 int i; |
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106 for (i = 0; i < len; i++) { |
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107 buf[i] = (uint8_t) (val & 0xff); |
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108 val >>= 8; |
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109 } |
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110 } |
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111 |
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112 static int wav_init_out (HWVoiceOut *hw, struct audsettings *as) |
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113 { |
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114 WAVVoiceOut *wav = (WAVVoiceOut *) hw; |
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115 int bits16 = 0, stereo = 0; |
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116 uint8_t hdr[] = { |
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117 0x52, 0x49, 0x46, 0x46, 0x00, 0x00, 0x00, 0x00, 0x57, 0x41, 0x56, |
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118 0x45, 0x66, 0x6d, 0x74, 0x20, 0x10, 0x00, 0x00, 0x00, 0x01, 0x00, |
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119 0x02, 0x00, 0x44, 0xac, 0x00, 0x00, 0x10, 0xb1, 0x02, 0x00, 0x04, |
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120 0x00, 0x10, 0x00, 0x64, 0x61, 0x74, 0x61, 0x00, 0x00, 0x00, 0x00 |
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121 }; |
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122 struct audsettings wav_as = conf.settings; |
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123 |
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124 (void) as; |
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125 |
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126 stereo = wav_as.nchannels == 2; |
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127 switch (wav_as.fmt) { |
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128 case AUD_FMT_S8: |
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129 case AUD_FMT_U8: |
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130 bits16 = 0; |
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131 break; |
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132 |
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133 case AUD_FMT_S16: |
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134 case AUD_FMT_U16: |
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135 bits16 = 1; |
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136 break; |
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137 |
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138 case AUD_FMT_S32: |
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139 case AUD_FMT_U32: |
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140 dolog ("WAVE files can not handle 32bit formats\n"); |
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141 return -1; |
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142 } |
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143 |
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144 hdr[34] = bits16 ? 0x10 : 0x08; |
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145 |
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146 wav_as.endianness = 0; |
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147 audio_pcm_init_info (&hw->info, &wav_as); |
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148 |
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149 hw->samples = 1024; |
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150 wav->pcm_buf = audio_calloc (AUDIO_FUNC, hw->samples, 1 << hw->info.shift); |
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151 if (!wav->pcm_buf) { |
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152 dolog ("Could not allocate buffer (%d bytes)\n", |
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153 hw->samples << hw->info.shift); |
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154 return -1; |
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155 } |
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156 |
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157 le_store (hdr + 22, hw->info.nchannels, 2); |
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158 le_store (hdr + 24, hw->info.freq, 4); |
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159 le_store (hdr + 28, hw->info.freq << (bits16 + stereo), 4); |
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160 le_store (hdr + 32, 1 << (bits16 + stereo), 2); |
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161 |
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162 wav->f = qemu_fopen (conf.wav_path, "wb"); |
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163 if (!wav->f) { |
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164 dolog ("Failed to open wave file `%s'\nReason: %s\n", |
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165 conf.wav_path, strerror (errno)); |
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166 qemu_free (wav->pcm_buf); |
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167 wav->pcm_buf = NULL; |
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168 return -1; |
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169 } |
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170 |
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171 qemu_put_buffer (wav->f, hdr, sizeof (hdr)); |
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172 return 0; |
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173 } |
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174 |
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175 static void wav_fini_out (HWVoiceOut *hw) |
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176 { |
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177 WAVVoiceOut *wav = (WAVVoiceOut *) hw; |
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178 uint8_t rlen[4]; |
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179 uint8_t dlen[4]; |
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180 uint32_t datalen = wav->total_samples << hw->info.shift; |
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181 uint32_t rifflen = datalen + 36; |
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182 |
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183 if (!wav->f) { |
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184 return; |
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185 } |
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186 |
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187 le_store (rlen, rifflen, 4); |
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188 le_store (dlen, datalen, 4); |
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189 |
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190 qemu_fseek (wav->f, 4, SEEK_SET); |
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191 qemu_put_buffer (wav->f, rlen, 4); |
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192 |
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193 qemu_fseek (wav->f, 32, SEEK_CUR); |
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194 qemu_put_buffer (wav->f, dlen, 4); |
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195 |
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196 qemu_fclose (wav->f); |
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197 wav->f = NULL; |
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198 |
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199 qemu_free (wav->pcm_buf); |
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200 wav->pcm_buf = NULL; |
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201 } |
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202 |
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203 static int wav_ctl_out (HWVoiceOut *hw, int cmd, ...) |
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204 { |
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205 (void) hw; |
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206 (void) cmd; |
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207 return 0; |
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208 } |
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209 |
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210 static void *wav_audio_init (void) |
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211 { |
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212 return &conf; |
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213 } |
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214 |
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215 static void wav_audio_fini (void *opaque) |
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216 { |
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217 (void) opaque; |
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218 ldebug ("wav_fini"); |
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219 } |
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220 |
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221 static struct audio_option wav_options[] = { |
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222 {"FREQUENCY", AUD_OPT_INT, &conf.settings.freq, |
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223 "Frequency", NULL, 0}, |
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224 |
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225 {"FORMAT", AUD_OPT_FMT, &conf.settings.fmt, |
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226 "Format", NULL, 0}, |
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227 |
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228 {"DAC_FIXED_CHANNELS", AUD_OPT_INT, &conf.settings.nchannels, |
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229 "Number of channels (1 - mono, 2 - stereo)", NULL, 0}, |
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230 |
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231 {"PATH", AUD_OPT_STR, &conf.wav_path, |
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232 "Path to wave file", NULL, 0}, |
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233 {NULL, 0, NULL, NULL, NULL, 0} |
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234 }; |
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235 |
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236 static struct audio_pcm_ops wav_pcm_ops = { |
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237 wav_init_out, |
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238 wav_fini_out, |
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239 wav_run_out, |
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240 wav_write_out, |
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241 wav_ctl_out, |
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242 |
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243 NULL, |
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244 NULL, |
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245 NULL, |
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246 NULL, |
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247 NULL |
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248 }; |
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249 |
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250 struct audio_driver wav_audio_driver = { |
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251 INIT_FIELD (name = ) "wav", |
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252 INIT_FIELD (descr = ) |
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253 "WAV renderer http://wikipedia.org/wiki/WAV", |
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254 INIT_FIELD (options = ) wav_options, |
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255 INIT_FIELD (init = ) wav_audio_init, |
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256 INIT_FIELD (fini = ) wav_audio_fini, |
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257 INIT_FIELD (pcm_ops = ) &wav_pcm_ops, |
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258 INIT_FIELD (can_be_default = ) 0, |
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259 INIT_FIELD (max_voices_out = ) 1, |
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260 INIT_FIELD (max_voices_in = ) 0, |
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261 INIT_FIELD (voice_size_out = ) sizeof (WAVVoiceOut), |
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262 INIT_FIELD (voice_size_in = ) 0 |
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263 }; |