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