1 /* 2 * QEMU WAV audio driver 3 * 4 * Copyright (c) 2004-2005 Vassili Karpov (malc) 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a copy 7 * of this software and associated documentation files (the "Software"), to deal 8 * in the Software without restriction, including without limitation the rights 9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 10 * copies of the Software, and to permit persons to whom the Software is 11 * furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 22 * THE SOFTWARE. 23 */ 24 #include "hw/hw.h" 25 #include "qemu/timer.h" 26 #include "audio.h" 27 28 #define AUDIO_CAP "wav" 29 #include "audio_int.h" 30 31 typedef struct WAVVoiceOut { 32 HWVoiceOut hw; 33 FILE *f; 34 int64_t old_ticks; 35 void *pcm_buf; 36 int total_samples; 37 } WAVVoiceOut; 38 39 static struct { 40 struct audsettings settings; 41 const char *wav_path; 42 } conf = { 43 .settings.freq = 44100, 44 .settings.nchannels = 2, 45 .settings.fmt = AUD_FMT_S16, 46 .wav_path = "qemu.wav" 47 }; 48 49 static int wav_run_out (HWVoiceOut *hw, int live) 50 { 51 WAVVoiceOut *wav = (WAVVoiceOut *) hw; 52 int rpos, decr, samples; 53 uint8_t *dst; 54 struct st_sample *src; 55 int64_t now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); 56 int64_t ticks = now - wav->old_ticks; 57 int64_t bytes = 58 muldiv64 (ticks, hw->info.bytes_per_second, get_ticks_per_sec ()); 59 60 if (bytes > INT_MAX) { 61 samples = INT_MAX >> hw->info.shift; 62 } 63 else { 64 samples = bytes >> hw->info.shift; 65 } 66 67 wav->old_ticks = now; 68 decr = audio_MIN (live, samples); 69 samples = decr; 70 rpos = hw->rpos; 71 while (samples) { 72 int left_till_end_samples = hw->samples - rpos; 73 int convert_samples = audio_MIN (samples, left_till_end_samples); 74 75 src = hw->mix_buf + rpos; 76 dst = advance (wav->pcm_buf, rpos << hw->info.shift); 77 78 hw->clip (dst, src, convert_samples); 79 if (fwrite (dst, convert_samples << hw->info.shift, 1, wav->f) != 1) { 80 dolog ("wav_run_out: fwrite of %d bytes failed\nReaons: %s\n", 81 convert_samples << hw->info.shift, strerror (errno)); 82 } 83 84 rpos = (rpos + convert_samples) % hw->samples; 85 samples -= convert_samples; 86 wav->total_samples += convert_samples; 87 } 88 89 hw->rpos = rpos; 90 return decr; 91 } 92 93 static int wav_write_out (SWVoiceOut *sw, void *buf, int len) 94 { 95 return audio_pcm_sw_write (sw, buf, len); 96 } 97 98 /* VICE code: Store number as little endian. */ 99 static void le_store (uint8_t *buf, uint32_t val, int len) 100 { 101 int i; 102 for (i = 0; i < len; i++) { 103 buf[i] = (uint8_t) (val & 0xff); 104 val >>= 8; 105 } 106 } 107 108 static int wav_init_out (HWVoiceOut *hw, struct audsettings *as) 109 { 110 WAVVoiceOut *wav = (WAVVoiceOut *) hw; 111 int bits16 = 0, stereo = 0; 112 uint8_t hdr[] = { 113 0x52, 0x49, 0x46, 0x46, 0x00, 0x00, 0x00, 0x00, 0x57, 0x41, 0x56, 114 0x45, 0x66, 0x6d, 0x74, 0x20, 0x10, 0x00, 0x00, 0x00, 0x01, 0x00, 115 0x02, 0x00, 0x44, 0xac, 0x00, 0x00, 0x10, 0xb1, 0x02, 0x00, 0x04, 116 0x00, 0x10, 0x00, 0x64, 0x61, 0x74, 0x61, 0x00, 0x00, 0x00, 0x00 117 }; 118 struct audsettings wav_as = conf.settings; 119 120 (void) as; 121 122 stereo = wav_as.nchannels == 2; 123 switch (wav_as.fmt) { 124 case AUD_FMT_S8: 125 case AUD_FMT_U8: 126 bits16 = 0; 127 break; 128 129 case AUD_FMT_S16: 130 case AUD_FMT_U16: 131 bits16 = 1; 132 break; 133 134 case AUD_FMT_S32: 135 case AUD_FMT_U32: 136 dolog ("WAVE files can not handle 32bit formats\n"); 137 return -1; 138 } 139 140 hdr[34] = bits16 ? 0x10 : 0x08; 141 142 wav_as.endianness = 0; 143 audio_pcm_init_info (&hw->info, &wav_as); 144 145 hw->samples = 1024; 146 wav->pcm_buf = audio_calloc (AUDIO_FUNC, hw->samples, 1 << hw->info.shift); 147 if (!wav->pcm_buf) { 148 dolog ("Could not allocate buffer (%d bytes)\n", 149 hw->samples << hw->info.shift); 150 return -1; 151 } 152 153 le_store (hdr + 22, hw->info.nchannels, 2); 154 le_store (hdr + 24, hw->info.freq, 4); 155 le_store (hdr + 28, hw->info.freq << (bits16 + stereo), 4); 156 le_store (hdr + 32, 1 << (bits16 + stereo), 2); 157 158 wav->f = fopen (conf.wav_path, "wb"); 159 if (!wav->f) { 160 dolog ("Failed to open wave file `%s'\nReason: %s\n", 161 conf.wav_path, strerror (errno)); 162 g_free (wav->pcm_buf); 163 wav->pcm_buf = NULL; 164 return -1; 165 } 166 167 if (fwrite (hdr, sizeof (hdr), 1, wav->f) != 1) { 168 dolog ("wav_init_out: failed to write header\nReason: %s\n", 169 strerror(errno)); 170 return -1; 171 } 172 return 0; 173 } 174 175 static void wav_fini_out (HWVoiceOut *hw) 176 { 177 WAVVoiceOut *wav = (WAVVoiceOut *) hw; 178 uint8_t rlen[4]; 179 uint8_t dlen[4]; 180 uint32_t datalen = wav->total_samples << hw->info.shift; 181 uint32_t rifflen = datalen + 36; 182 183 if (!wav->f) { 184 return; 185 } 186 187 le_store (rlen, rifflen, 4); 188 le_store (dlen, datalen, 4); 189 190 if (fseek (wav->f, 4, SEEK_SET)) { 191 dolog ("wav_fini_out: fseek to rlen failed\nReason: %s\n", 192 strerror(errno)); 193 goto doclose; 194 } 195 if (fwrite (rlen, 4, 1, wav->f) != 1) { 196 dolog ("wav_fini_out: failed to write rlen\nReason: %s\n", 197 strerror (errno)); 198 goto doclose; 199 } 200 if (fseek (wav->f, 32, SEEK_CUR)) { 201 dolog ("wav_fini_out: fseek to dlen failed\nReason: %s\n", 202 strerror (errno)); 203 goto doclose; 204 } 205 if (fwrite (dlen, 4, 1, wav->f) != 1) { 206 dolog ("wav_fini_out: failed to write dlen\nReaons: %s\n", 207 strerror (errno)); 208 goto doclose; 209 } 210 211 doclose: 212 if (fclose (wav->f)) { 213 dolog ("wav_fini_out: fclose %p failed\nReason: %s\n", 214 wav->f, strerror (errno)); 215 } 216 wav->f = NULL; 217 218 g_free (wav->pcm_buf); 219 wav->pcm_buf = NULL; 220 } 221 222 static int wav_ctl_out (HWVoiceOut *hw, int cmd, ...) 223 { 224 (void) hw; 225 (void) cmd; 226 return 0; 227 } 228 229 static void *wav_audio_init (void) 230 { 231 return &conf; 232 } 233 234 static void wav_audio_fini (void *opaque) 235 { 236 (void) opaque; 237 ldebug ("wav_fini"); 238 } 239 240 static struct audio_option wav_options[] = { 241 { 242 .name = "FREQUENCY", 243 .tag = AUD_OPT_INT, 244 .valp = &conf.settings.freq, 245 .descr = "Frequency" 246 }, 247 { 248 .name = "FORMAT", 249 .tag = AUD_OPT_FMT, 250 .valp = &conf.settings.fmt, 251 .descr = "Format" 252 }, 253 { 254 .name = "DAC_FIXED_CHANNELS", 255 .tag = AUD_OPT_INT, 256 .valp = &conf.settings.nchannels, 257 .descr = "Number of channels (1 - mono, 2 - stereo)" 258 }, 259 { 260 .name = "PATH", 261 .tag = AUD_OPT_STR, 262 .valp = &conf.wav_path, 263 .descr = "Path to wave file" 264 }, 265 { /* End of list */ } 266 }; 267 268 static struct audio_pcm_ops wav_pcm_ops = { 269 .init_out = wav_init_out, 270 .fini_out = wav_fini_out, 271 .run_out = wav_run_out, 272 .write = wav_write_out, 273 .ctl_out = wav_ctl_out, 274 }; 275 276 struct audio_driver wav_audio_driver = { 277 .name = "wav", 278 .descr = "WAV renderer http://wikipedia.org/wiki/WAV", 279 .options = wav_options, 280 .init = wav_audio_init, 281 .fini = wav_audio_fini, 282 .pcm_ops = &wav_pcm_ops, 283 .can_be_default = 0, 284 .max_voices_out = 1, 285 .max_voices_in = 0, 286 .voice_size_out = sizeof (WAVVoiceOut), 287 .voice_size_in = 0 288 }; 289