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 "qemu/osdep.h" 25 #include "qemu/host-utils.h" 26 #include "qemu/timer.h" 27 #include "audio.h" 28 29 #define AUDIO_CAP "wav" 30 #include "audio_int.h" 31 32 typedef struct WAVVoiceOut { 33 HWVoiceOut hw; 34 FILE *f; 35 int64_t old_ticks; 36 void *pcm_buf; 37 int total_samples; 38 } WAVVoiceOut; 39 40 typedef struct { 41 struct audsettings settings; 42 const char *wav_path; 43 } WAVConf; 44 45 static int wav_run_out (HWVoiceOut *hw, int live) 46 { 47 WAVVoiceOut *wav = (WAVVoiceOut *) hw; 48 int rpos, decr, samples; 49 uint8_t *dst; 50 struct st_sample *src; 51 int64_t now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); 52 int64_t ticks = now - wav->old_ticks; 53 int64_t bytes = 54 muldiv64(ticks, hw->info.bytes_per_second, NANOSECONDS_PER_SECOND); 55 56 if (bytes > INT_MAX) { 57 samples = INT_MAX >> hw->info.shift; 58 } 59 else { 60 samples = bytes >> hw->info.shift; 61 } 62 63 wav->old_ticks = now; 64 decr = audio_MIN (live, samples); 65 samples = decr; 66 rpos = hw->rpos; 67 while (samples) { 68 int left_till_end_samples = hw->samples - rpos; 69 int convert_samples = audio_MIN (samples, left_till_end_samples); 70 71 src = hw->mix_buf + rpos; 72 dst = advance (wav->pcm_buf, rpos << hw->info.shift); 73 74 hw->clip (dst, src, convert_samples); 75 if (fwrite (dst, convert_samples << hw->info.shift, 1, wav->f) != 1) { 76 dolog ("wav_run_out: fwrite of %d bytes failed\nReaons: %s\n", 77 convert_samples << hw->info.shift, strerror (errno)); 78 } 79 80 rpos = (rpos + convert_samples) % hw->samples; 81 samples -= convert_samples; 82 wav->total_samples += convert_samples; 83 } 84 85 hw->rpos = rpos; 86 return decr; 87 } 88 89 static int wav_write_out (SWVoiceOut *sw, void *buf, int len) 90 { 91 return audio_pcm_sw_write (sw, buf, len); 92 } 93 94 /* VICE code: Store number as little endian. */ 95 static void le_store (uint8_t *buf, uint32_t val, int len) 96 { 97 int i; 98 for (i = 0; i < len; i++) { 99 buf[i] = (uint8_t) (val & 0xff); 100 val >>= 8; 101 } 102 } 103 104 static int wav_init_out(HWVoiceOut *hw, struct audsettings *as, 105 void *drv_opaque) 106 { 107 WAVVoiceOut *wav = (WAVVoiceOut *) hw; 108 int bits16 = 0, stereo = 0; 109 uint8_t hdr[] = { 110 0x52, 0x49, 0x46, 0x46, 0x00, 0x00, 0x00, 0x00, 0x57, 0x41, 0x56, 111 0x45, 0x66, 0x6d, 0x74, 0x20, 0x10, 0x00, 0x00, 0x00, 0x01, 0x00, 112 0x02, 0x00, 0x44, 0xac, 0x00, 0x00, 0x10, 0xb1, 0x02, 0x00, 0x04, 113 0x00, 0x10, 0x00, 0x64, 0x61, 0x74, 0x61, 0x00, 0x00, 0x00, 0x00 114 }; 115 WAVConf *conf = drv_opaque; 116 struct audsettings wav_as = conf->settings; 117 118 stereo = wav_as.nchannels == 2; 119 switch (wav_as.fmt) { 120 case AUD_FMT_S8: 121 case AUD_FMT_U8: 122 bits16 = 0; 123 break; 124 125 case AUD_FMT_S16: 126 case AUD_FMT_U16: 127 bits16 = 1; 128 break; 129 130 case AUD_FMT_S32: 131 case AUD_FMT_U32: 132 dolog ("WAVE files can not handle 32bit formats\n"); 133 return -1; 134 } 135 136 hdr[34] = bits16 ? 0x10 : 0x08; 137 138 wav_as.endianness = 0; 139 audio_pcm_init_info (&hw->info, &wav_as); 140 141 hw->samples = 1024; 142 wav->pcm_buf = audio_calloc(__func__, hw->samples, 1 << hw->info.shift); 143 if (!wav->pcm_buf) { 144 dolog ("Could not allocate buffer (%d bytes)\n", 145 hw->samples << hw->info.shift); 146 return -1; 147 } 148 149 le_store (hdr + 22, hw->info.nchannels, 2); 150 le_store (hdr + 24, hw->info.freq, 4); 151 le_store (hdr + 28, hw->info.freq << (bits16 + stereo), 4); 152 le_store (hdr + 32, 1 << (bits16 + stereo), 2); 153 154 wav->f = fopen (conf->wav_path, "wb"); 155 if (!wav->f) { 156 dolog ("Failed to open wave file `%s'\nReason: %s\n", 157 conf->wav_path, strerror (errno)); 158 g_free (wav->pcm_buf); 159 wav->pcm_buf = NULL; 160 return -1; 161 } 162 163 if (fwrite (hdr, sizeof (hdr), 1, wav->f) != 1) { 164 dolog ("wav_init_out: failed to write header\nReason: %s\n", 165 strerror(errno)); 166 return -1; 167 } 168 return 0; 169 } 170 171 static void wav_fini_out (HWVoiceOut *hw) 172 { 173 WAVVoiceOut *wav = (WAVVoiceOut *) hw; 174 uint8_t rlen[4]; 175 uint8_t dlen[4]; 176 uint32_t datalen = wav->total_samples << hw->info.shift; 177 uint32_t rifflen = datalen + 36; 178 179 if (!wav->f) { 180 return; 181 } 182 183 le_store (rlen, rifflen, 4); 184 le_store (dlen, datalen, 4); 185 186 if (fseek (wav->f, 4, SEEK_SET)) { 187 dolog ("wav_fini_out: fseek to rlen failed\nReason: %s\n", 188 strerror(errno)); 189 goto doclose; 190 } 191 if (fwrite (rlen, 4, 1, wav->f) != 1) { 192 dolog ("wav_fini_out: failed to write rlen\nReason: %s\n", 193 strerror (errno)); 194 goto doclose; 195 } 196 if (fseek (wav->f, 32, SEEK_CUR)) { 197 dolog ("wav_fini_out: fseek to dlen failed\nReason: %s\n", 198 strerror (errno)); 199 goto doclose; 200 } 201 if (fwrite (dlen, 4, 1, wav->f) != 1) { 202 dolog ("wav_fini_out: failed to write dlen\nReaons: %s\n", 203 strerror (errno)); 204 goto doclose; 205 } 206 207 doclose: 208 if (fclose (wav->f)) { 209 dolog ("wav_fini_out: fclose %p failed\nReason: %s\n", 210 wav->f, strerror (errno)); 211 } 212 wav->f = NULL; 213 214 g_free (wav->pcm_buf); 215 wav->pcm_buf = NULL; 216 } 217 218 static int wav_ctl_out (HWVoiceOut *hw, int cmd, ...) 219 { 220 (void) hw; 221 (void) cmd; 222 return 0; 223 } 224 225 static WAVConf glob_conf = { 226 .settings.freq = 44100, 227 .settings.nchannels = 2, 228 .settings.fmt = AUD_FMT_S16, 229 .wav_path = "qemu.wav" 230 }; 231 232 static void *wav_audio_init (void) 233 { 234 WAVConf *conf = g_malloc(sizeof(WAVConf)); 235 *conf = glob_conf; 236 return conf; 237 } 238 239 static void wav_audio_fini (void *opaque) 240 { 241 ldebug ("wav_fini"); 242 g_free(opaque); 243 } 244 245 static struct audio_option wav_options[] = { 246 { 247 .name = "FREQUENCY", 248 .tag = AUD_OPT_INT, 249 .valp = &glob_conf.settings.freq, 250 .descr = "Frequency" 251 }, 252 { 253 .name = "FORMAT", 254 .tag = AUD_OPT_FMT, 255 .valp = &glob_conf.settings.fmt, 256 .descr = "Format" 257 }, 258 { 259 .name = "DAC_FIXED_CHANNELS", 260 .tag = AUD_OPT_INT, 261 .valp = &glob_conf.settings.nchannels, 262 .descr = "Number of channels (1 - mono, 2 - stereo)" 263 }, 264 { 265 .name = "PATH", 266 .tag = AUD_OPT_STR, 267 .valp = &glob_conf.wav_path, 268 .descr = "Path to wave file" 269 }, 270 { /* End of list */ } 271 }; 272 273 static struct audio_pcm_ops wav_pcm_ops = { 274 .init_out = wav_init_out, 275 .fini_out = wav_fini_out, 276 .run_out = wav_run_out, 277 .write = wav_write_out, 278 .ctl_out = wav_ctl_out, 279 }; 280 281 static struct audio_driver wav_audio_driver = { 282 .name = "wav", 283 .descr = "WAV renderer http://wikipedia.org/wiki/WAV", 284 .options = wav_options, 285 .init = wav_audio_init, 286 .fini = wav_audio_fini, 287 .pcm_ops = &wav_pcm_ops, 288 .can_be_default = 0, 289 .max_voices_out = 1, 290 .max_voices_in = 0, 291 .voice_size_out = sizeof (WAVVoiceOut), 292 .voice_size_in = 0 293 }; 294 295 static void register_audio_wav(void) 296 { 297 audio_driver_register(&wav_audio_driver); 298 } 299 type_init(register_audio_wav); 300