root / audio / wavaudio.c @ 192c7bd9
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1 | 85571bc7 | bellard | /*
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2 | 85571bc7 | bellard | * QEMU WAV audio output driver
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3 | 85571bc7 | bellard | *
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4 | 85571bc7 | bellard | * Copyright (c) 2004 Vassili Karpov (malc)
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5 | 85571bc7 | bellard | *
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6 | 85571bc7 | bellard | * Permission is hereby granted, free of charge, to any person obtaining a copy
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7 | 85571bc7 | bellard | * of this software and associated documentation files (the "Software"), to deal
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8 | 85571bc7 | bellard | * in the Software without restriction, including without limitation the rights
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9 | 85571bc7 | bellard | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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10 | 85571bc7 | bellard | * copies of the Software, and to permit persons to whom the Software is
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11 | 85571bc7 | bellard | * furnished to do so, subject to the following conditions:
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12 | 85571bc7 | bellard | *
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13 | 85571bc7 | bellard | * The above copyright notice and this permission notice shall be included in
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14 | 85571bc7 | bellard | * all copies or substantial portions of the Software.
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15 | 85571bc7 | bellard | *
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16 | 85571bc7 | bellard | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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17 | 85571bc7 | bellard | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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18 | 85571bc7 | bellard | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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19 | 85571bc7 | bellard | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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20 | 85571bc7 | bellard | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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21 | 85571bc7 | bellard | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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22 | 85571bc7 | bellard | * THE SOFTWARE.
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23 | 85571bc7 | bellard | */
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24 | 85571bc7 | bellard | #include "vl.h" |
25 | 85571bc7 | bellard | |
26 | fb065187 | bellard | #include "audio/audio_int.h" |
27 | fb065187 | bellard | |
28 | fb065187 | bellard | typedef struct WAVVoice { |
29 | fb065187 | bellard | HWVoice hw; |
30 | fb065187 | bellard | QEMUFile *f; |
31 | fb065187 | bellard | int64_t old_ticks; |
32 | fb065187 | bellard | void *pcm_buf;
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33 | fb065187 | bellard | int total_samples;
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34 | fb065187 | bellard | } WAVVoice; |
35 | fb065187 | bellard | |
36 | fb065187 | bellard | #define dolog(...) AUD_log ("wav", __VA_ARGS__) |
37 | fb065187 | bellard | #ifdef DEBUG
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38 | fb065187 | bellard | #define ldebug(...) dolog (__VA_ARGS__)
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39 | fb065187 | bellard | #else
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40 | fb065187 | bellard | #define ldebug(...)
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41 | fb065187 | bellard | #endif
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42 | 85571bc7 | bellard | |
43 | 85571bc7 | bellard | static struct { |
44 | 85571bc7 | bellard | const char *wav_path; |
45 | 85571bc7 | bellard | } conf = { |
46 | 85571bc7 | bellard | .wav_path = "qemu.wav"
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47 | 85571bc7 | bellard | }; |
48 | 85571bc7 | bellard | |
49 | 85571bc7 | bellard | static void wav_hw_run (HWVoice *hw) |
50 | 85571bc7 | bellard | { |
51 | 85571bc7 | bellard | WAVVoice *wav = (WAVVoice *) hw; |
52 | 85571bc7 | bellard | int rpos, live, decr, samples;
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53 | 85571bc7 | bellard | uint8_t *dst; |
54 | 85571bc7 | bellard | st_sample_t *src; |
55 | 85571bc7 | bellard | int64_t now = qemu_get_clock (vm_clock); |
56 | 85571bc7 | bellard | int64_t ticks = now - wav->old_ticks; |
57 | 85571bc7 | bellard | int64_t bytes = (ticks * hw->bytes_per_second) / ticks_per_sec; |
58 | 85571bc7 | bellard | |
59 | 85571bc7 | bellard | if (bytes > INT_MAX)
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60 | 85571bc7 | bellard | samples = INT_MAX >> hw->shift; |
61 | 85571bc7 | bellard | else
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62 | 85571bc7 | bellard | samples = bytes >> hw->shift; |
63 | 85571bc7 | bellard | |
64 | 85571bc7 | bellard | live = pcm_hw_get_live (hw); |
65 | 85571bc7 | bellard | if (live <= 0) |
66 | 85571bc7 | bellard | return;
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67 | 85571bc7 | bellard | |
68 | 7372f88d | bellard | wav->old_ticks = now; |
69 | 85571bc7 | bellard | decr = audio_MIN (live, samples); |
70 | 85571bc7 | bellard | samples = decr; |
71 | 85571bc7 | bellard | rpos = hw->rpos; |
72 | 85571bc7 | bellard | while (samples) {
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73 | 85571bc7 | bellard | int left_till_end_samples = hw->samples - rpos;
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74 | 85571bc7 | bellard | int convert_samples = audio_MIN (samples, left_till_end_samples);
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75 | 85571bc7 | bellard | |
76 | 85571bc7 | bellard | src = advance (hw->mix_buf, rpos * sizeof (st_sample_t));
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77 | 85571bc7 | bellard | dst = advance (wav->pcm_buf, rpos << hw->shift); |
78 | 85571bc7 | bellard | |
79 | 85571bc7 | bellard | hw->clip (dst, src, convert_samples); |
80 | 85571bc7 | bellard | qemu_put_buffer (wav->f, dst, convert_samples << hw->shift); |
81 | 85571bc7 | bellard | memset (src, 0, convert_samples * sizeof (st_sample_t)); |
82 | 85571bc7 | bellard | |
83 | 85571bc7 | bellard | rpos = (rpos + convert_samples) % hw->samples; |
84 | 85571bc7 | bellard | samples -= convert_samples; |
85 | 85571bc7 | bellard | wav->total_samples += convert_samples; |
86 | 85571bc7 | bellard | } |
87 | 85571bc7 | bellard | |
88 | 85571bc7 | bellard | pcm_hw_dec_live (hw, decr); |
89 | 85571bc7 | bellard | hw->rpos = rpos; |
90 | 85571bc7 | bellard | } |
91 | 85571bc7 | bellard | |
92 | 85571bc7 | bellard | static int wav_hw_write (SWVoice *sw, void *buf, int len) |
93 | 85571bc7 | bellard | { |
94 | 85571bc7 | bellard | return pcm_hw_write (sw, buf, len);
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95 | 85571bc7 | bellard | } |
96 | 85571bc7 | bellard | |
97 | 85571bc7 | bellard | /* VICE code: Store number as little endian. */
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98 | 85571bc7 | bellard | static void le_store (uint8_t *buf, uint32_t val, int len) |
99 | 85571bc7 | bellard | { |
100 | 85571bc7 | bellard | int i;
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101 | 85571bc7 | bellard | for (i = 0; i < len; i++) { |
102 | 85571bc7 | bellard | buf[i] = (uint8_t) (val & 0xff);
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103 | 85571bc7 | bellard | val >>= 8;
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104 | 85571bc7 | bellard | } |
105 | 85571bc7 | bellard | } |
106 | 85571bc7 | bellard | |
107 | 85571bc7 | bellard | static int wav_hw_init (HWVoice *hw, int freq, int nchannels, audfmt_e fmt) |
108 | 85571bc7 | bellard | { |
109 | 85571bc7 | bellard | WAVVoice *wav = (WAVVoice *) hw; |
110 | 85571bc7 | bellard | int bits16 = 0, stereo = audio_state.fixed_channels == 2; |
111 | 85571bc7 | bellard | uint8_t hdr[] = { |
112 | 85571bc7 | bellard | 0x52, 0x49, 0x46, 0x46, 0x00, 0x00, 0x00, 0x00, 0x57, 0x41, 0x56, |
113 | 85571bc7 | bellard | 0x45, 0x66, 0x6d, 0x74, 0x20, 0x10, 0x00, 0x00, 0x00, 0x01, 0x00, |
114 | 85571bc7 | bellard | 0x02, 0x00, 0x44, 0xac, 0x00, 0x00, 0x10, 0xb1, 0x02, 0x00, 0x04, |
115 | 85571bc7 | bellard | 0x00, 0x10, 0x00, 0x64, 0x61, 0x74, 0x61, 0x00, 0x00, 0x00, 0x00 |
116 | 85571bc7 | bellard | }; |
117 | 85571bc7 | bellard | |
118 | 85571bc7 | bellard | switch (audio_state.fixed_fmt) {
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119 | 85571bc7 | bellard | case AUD_FMT_S8:
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120 | 85571bc7 | bellard | case AUD_FMT_U8:
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121 | 85571bc7 | bellard | break;
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122 | 85571bc7 | bellard | |
123 | 85571bc7 | bellard | case AUD_FMT_S16:
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124 | 85571bc7 | bellard | case AUD_FMT_U16:
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125 | 85571bc7 | bellard | bits16 = 1;
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126 | 85571bc7 | bellard | break;
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127 | 85571bc7 | bellard | } |
128 | 85571bc7 | bellard | |
129 | 85571bc7 | bellard | hdr[34] = bits16 ? 0x10 : 0x08; |
130 | 85571bc7 | bellard | hw->freq = 44100;
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131 | 85571bc7 | bellard | hw->nchannels = stereo ? 2 : 1; |
132 | 85571bc7 | bellard | hw->fmt = bits16 ? AUD_FMT_S16 : AUD_FMT_U8; |
133 | 85571bc7 | bellard | hw->bufsize = 4096;
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134 | 85571bc7 | bellard | wav->pcm_buf = qemu_mallocz (hw->bufsize); |
135 | 85571bc7 | bellard | if (!wav->pcm_buf)
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136 | 85571bc7 | bellard | return -1; |
137 | 85571bc7 | bellard | |
138 | 85571bc7 | bellard | le_store (hdr + 22, hw->nchannels, 2); |
139 | 85571bc7 | bellard | le_store (hdr + 24, hw->freq, 4); |
140 | 85571bc7 | bellard | le_store (hdr + 28, hw->freq << (bits16 + stereo), 4); |
141 | 85571bc7 | bellard | le_store (hdr + 32, 1 << (bits16 + stereo), 2); |
142 | 85571bc7 | bellard | |
143 | 85571bc7 | bellard | wav->f = fopen (conf.wav_path, "wb");
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144 | 85571bc7 | bellard | if (!wav->f) {
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145 | 85571bc7 | bellard | dolog ("failed to open wave file `%s'\nReason: %s\n",
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146 | 85571bc7 | bellard | conf.wav_path, strerror (errno)); |
147 | 7372f88d | bellard | qemu_free (wav->pcm_buf); |
148 | 7372f88d | bellard | wav->pcm_buf = NULL;
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149 | 85571bc7 | bellard | return -1; |
150 | 85571bc7 | bellard | } |
151 | 85571bc7 | bellard | |
152 | 85571bc7 | bellard | qemu_put_buffer (wav->f, hdr, sizeof (hdr));
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153 | 85571bc7 | bellard | return 0; |
154 | 85571bc7 | bellard | } |
155 | 85571bc7 | bellard | |
156 | 85571bc7 | bellard | static void wav_hw_fini (HWVoice *hw) |
157 | 85571bc7 | bellard | { |
158 | 85571bc7 | bellard | WAVVoice *wav = (WAVVoice *) hw; |
159 | 85571bc7 | bellard | int stereo = hw->nchannels == 2; |
160 | 85571bc7 | bellard | uint8_t rlen[4];
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161 | 85571bc7 | bellard | uint8_t dlen[4];
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162 | 85571bc7 | bellard | uint32_t rifflen = (wav->total_samples << stereo) + 36;
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163 | 85571bc7 | bellard | uint32_t datalen = wav->total_samples << stereo; |
164 | 85571bc7 | bellard | |
165 | 85571bc7 | bellard | if (!wav->f || !hw->active)
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166 | 85571bc7 | bellard | return;
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167 | 85571bc7 | bellard | |
168 | 85571bc7 | bellard | le_store (rlen, rifflen, 4);
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169 | 85571bc7 | bellard | le_store (dlen, datalen, 4);
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170 | 85571bc7 | bellard | |
171 | 85571bc7 | bellard | qemu_fseek (wav->f, 4, SEEK_SET);
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172 | 85571bc7 | bellard | qemu_put_buffer (wav->f, rlen, 4);
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173 | 85571bc7 | bellard | |
174 | 85571bc7 | bellard | qemu_fseek (wav->f, 32, SEEK_CUR);
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175 | 85571bc7 | bellard | qemu_put_buffer (wav->f, dlen, 4);
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176 | 85571bc7 | bellard | |
177 | 85571bc7 | bellard | fclose (wav->f); |
178 | 85571bc7 | bellard | wav->f = NULL;
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179 | 7372f88d | bellard | |
180 | 7372f88d | bellard | qemu_free (wav->pcm_buf); |
181 | 7372f88d | bellard | wav->pcm_buf = NULL;
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182 | 85571bc7 | bellard | } |
183 | 85571bc7 | bellard | |
184 | 85571bc7 | bellard | static int wav_hw_ctl (HWVoice *hw, int cmd, ...) |
185 | 85571bc7 | bellard | { |
186 | 85571bc7 | bellard | (void) hw;
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187 | 85571bc7 | bellard | (void) cmd;
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188 | 85571bc7 | bellard | return 0; |
189 | 85571bc7 | bellard | } |
190 | 85571bc7 | bellard | |
191 | 85571bc7 | bellard | static void *wav_audio_init (void) |
192 | 85571bc7 | bellard | { |
193 | 85571bc7 | bellard | return &conf;
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194 | 85571bc7 | bellard | } |
195 | 85571bc7 | bellard | |
196 | 85571bc7 | bellard | static void wav_audio_fini (void *opaque) |
197 | 85571bc7 | bellard | { |
198 | 85571bc7 | bellard | ldebug ("wav_fini");
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199 | 85571bc7 | bellard | } |
200 | 85571bc7 | bellard | |
201 | 85571bc7 | bellard | struct pcm_ops wav_pcm_ops = {
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202 | 85571bc7 | bellard | wav_hw_init, |
203 | 85571bc7 | bellard | wav_hw_fini, |
204 | 85571bc7 | bellard | wav_hw_run, |
205 | 85571bc7 | bellard | wav_hw_write, |
206 | 85571bc7 | bellard | wav_hw_ctl |
207 | 85571bc7 | bellard | }; |
208 | 85571bc7 | bellard | |
209 | 85571bc7 | bellard | struct audio_output_driver wav_output_driver = {
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210 | 85571bc7 | bellard | "wav",
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211 | 85571bc7 | bellard | wav_audio_init, |
212 | 85571bc7 | bellard | wav_audio_fini, |
213 | 85571bc7 | bellard | &wav_pcm_ops, |
214 | 85571bc7 | bellard | 1,
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215 | 85571bc7 | bellard | 1,
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216 | 85571bc7 | bellard | sizeof (WAVVoice)
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217 | 85571bc7 | bellard | }; |