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 25 #include "qemu/osdep.h" 26 #include "qemu/host-utils.h" 27 #include "qemu/module.h" 28 #include "qemu/timer.h" 29 #include "qapi/opts-visitor.h" 30 #include "audio.h" 31 32 #define AUDIO_CAP "wav" 33 #include "audio_int.h" 34 35 typedef struct WAVVoiceOut { 36 HWVoiceOut hw; 37 FILE *f; 38 int64_t old_ticks; 39 void *pcm_buf; 40 int total_samples; 41 } WAVVoiceOut; 42 43 static size_t wav_run_out(HWVoiceOut *hw, size_t live) 44 { 45 WAVVoiceOut *wav = (WAVVoiceOut *) hw; 46 size_t rpos, decr, samples; 47 uint8_t *dst; 48 struct st_sample *src; 49 int64_t now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); 50 int64_t ticks = now - wav->old_ticks; 51 int64_t bytes = 52 muldiv64(ticks, hw->info.bytes_per_second, NANOSECONDS_PER_SECOND); 53 54 if (bytes > INT_MAX) { 55 samples = INT_MAX >> hw->info.shift; 56 } 57 else { 58 samples = bytes >> hw->info.shift; 59 } 60 61 wav->old_ticks = now; 62 decr = MIN (live, samples); 63 samples = decr; 64 rpos = hw->rpos; 65 while (samples) { 66 int left_till_end_samples = hw->samples - rpos; 67 int convert_samples = MIN (samples, left_till_end_samples); 68 69 src = hw->mix_buf + rpos; 70 dst = advance (wav->pcm_buf, rpos << hw->info.shift); 71 72 hw->clip (dst, src, convert_samples); 73 if (fwrite (dst, convert_samples << hw->info.shift, 1, wav->f) != 1) { 74 dolog ("wav_run_out: fwrite of %d bytes failed\nReaons: %s\n", 75 convert_samples << hw->info.shift, strerror (errno)); 76 } 77 78 rpos = (rpos + convert_samples) % hw->samples; 79 samples -= convert_samples; 80 wav->total_samples += convert_samples; 81 } 82 83 hw->rpos = rpos; 84 return decr; 85 } 86 87 /* VICE code: Store number as little endian. */ 88 static void le_store (uint8_t *buf, uint32_t val, int len) 89 { 90 int i; 91 for (i = 0; i < len; i++) { 92 buf[i] = (uint8_t) (val & 0xff); 93 val >>= 8; 94 } 95 } 96 97 static int wav_init_out(HWVoiceOut *hw, struct audsettings *as, 98 void *drv_opaque) 99 { 100 WAVVoiceOut *wav = (WAVVoiceOut *) hw; 101 int bits16 = 0, stereo = 0; 102 uint8_t hdr[] = { 103 0x52, 0x49, 0x46, 0x46, 0x00, 0x00, 0x00, 0x00, 0x57, 0x41, 0x56, 104 0x45, 0x66, 0x6d, 0x74, 0x20, 0x10, 0x00, 0x00, 0x00, 0x01, 0x00, 105 0x02, 0x00, 0x44, 0xac, 0x00, 0x00, 0x10, 0xb1, 0x02, 0x00, 0x04, 106 0x00, 0x10, 0x00, 0x64, 0x61, 0x74, 0x61, 0x00, 0x00, 0x00, 0x00 107 }; 108 Audiodev *dev = drv_opaque; 109 AudiodevWavOptions *wopts = &dev->u.wav; 110 struct audsettings wav_as = audiodev_to_audsettings(dev->u.wav.out); 111 const char *wav_path = wopts->has_path ? wopts->path : "qemu.wav"; 112 113 stereo = wav_as.nchannels == 2; 114 switch (wav_as.fmt) { 115 case AUDIO_FORMAT_S8: 116 case AUDIO_FORMAT_U8: 117 bits16 = 0; 118 break; 119 120 case AUDIO_FORMAT_S16: 121 case AUDIO_FORMAT_U16: 122 bits16 = 1; 123 break; 124 125 case AUDIO_FORMAT_S32: 126 case AUDIO_FORMAT_U32: 127 dolog ("WAVE files can not handle 32bit formats\n"); 128 return -1; 129 130 default: 131 abort(); 132 } 133 134 hdr[34] = bits16 ? 0x10 : 0x08; 135 136 wav_as.endianness = 0; 137 audio_pcm_init_info (&hw->info, &wav_as); 138 139 hw->samples = 1024; 140 wav->pcm_buf = audio_calloc(__func__, hw->samples, 1 << hw->info.shift); 141 if (!wav->pcm_buf) { 142 dolog("Could not allocate buffer (%zu bytes)\n", 143 hw->samples << hw->info.shift); 144 return -1; 145 } 146 147 le_store (hdr + 22, hw->info.nchannels, 2); 148 le_store (hdr + 24, hw->info.freq, 4); 149 le_store (hdr + 28, hw->info.freq << (bits16 + stereo), 4); 150 le_store (hdr + 32, 1 << (bits16 + stereo), 2); 151 152 wav->f = fopen(wav_path, "wb"); 153 if (!wav->f) { 154 dolog ("Failed to open wave file `%s'\nReason: %s\n", 155 wav_path, strerror(errno)); 156 g_free (wav->pcm_buf); 157 wav->pcm_buf = NULL; 158 return -1; 159 } 160 161 if (fwrite (hdr, sizeof (hdr), 1, wav->f) != 1) { 162 dolog ("wav_init_out: failed to write header\nReason: %s\n", 163 strerror(errno)); 164 return -1; 165 } 166 return 0; 167 } 168 169 static void wav_fini_out (HWVoiceOut *hw) 170 { 171 WAVVoiceOut *wav = (WAVVoiceOut *) hw; 172 uint8_t rlen[4]; 173 uint8_t dlen[4]; 174 uint32_t datalen = wav->total_samples << hw->info.shift; 175 uint32_t rifflen = datalen + 36; 176 177 if (!wav->f) { 178 return; 179 } 180 181 le_store (rlen, rifflen, 4); 182 le_store (dlen, datalen, 4); 183 184 if (fseek (wav->f, 4, SEEK_SET)) { 185 dolog ("wav_fini_out: fseek to rlen failed\nReason: %s\n", 186 strerror(errno)); 187 goto doclose; 188 } 189 if (fwrite (rlen, 4, 1, wav->f) != 1) { 190 dolog ("wav_fini_out: failed to write rlen\nReason: %s\n", 191 strerror (errno)); 192 goto doclose; 193 } 194 if (fseek (wav->f, 32, SEEK_CUR)) { 195 dolog ("wav_fini_out: fseek to dlen failed\nReason: %s\n", 196 strerror (errno)); 197 goto doclose; 198 } 199 if (fwrite (dlen, 4, 1, wav->f) != 1) { 200 dolog ("wav_fini_out: failed to write dlen\nReaons: %s\n", 201 strerror (errno)); 202 goto doclose; 203 } 204 205 doclose: 206 if (fclose (wav->f)) { 207 dolog ("wav_fini_out: fclose %p failed\nReason: %s\n", 208 wav->f, strerror (errno)); 209 } 210 wav->f = NULL; 211 212 g_free (wav->pcm_buf); 213 wav->pcm_buf = NULL; 214 } 215 216 static int wav_ctl_out (HWVoiceOut *hw, int cmd, ...) 217 { 218 (void) hw; 219 (void) cmd; 220 return 0; 221 } 222 223 static void *wav_audio_init(Audiodev *dev) 224 { 225 assert(dev->driver == AUDIODEV_DRIVER_WAV); 226 return dev; 227 } 228 229 static void wav_audio_fini (void *opaque) 230 { 231 ldebug ("wav_fini"); 232 } 233 234 static struct audio_pcm_ops wav_pcm_ops = { 235 .init_out = wav_init_out, 236 .fini_out = wav_fini_out, 237 .run_out = wav_run_out, 238 .ctl_out = wav_ctl_out, 239 }; 240 241 static struct audio_driver wav_audio_driver = { 242 .name = "wav", 243 .descr = "WAV renderer http://wikipedia.org/wiki/WAV", 244 .init = wav_audio_init, 245 .fini = wav_audio_fini, 246 .pcm_ops = &wav_pcm_ops, 247 .can_be_default = 0, 248 .max_voices_out = 1, 249 .max_voices_in = 0, 250 .voice_size_out = sizeof (WAVVoiceOut), 251 .voice_size_in = 0 252 }; 253 254 static void register_audio_wav(void) 255 { 256 audio_driver_register(&wav_audio_driver); 257 } 258 type_init(register_audio_wav); 259