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