audio/wavaudio.c

   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 "qapi/opts-visitor.h"
  28 #include "audio.h"
  29
  30 #define AUDIO_CAP "wav"
  31 #include "audio_int.h"
  32
  33 typedef struct WAVVoiceOut {
  34     HWVoiceOut hw;
  35     FILE *f;
  36     int64_t old_ticks;
  37     void *pcm_buf;
  38     int total_samples;
  39 } WAVVoiceOut;
  40
  41 static int wav_run_out (HWVoiceOut *hw, int live)
  42 {
  43     WAVVoiceOut *wav = (WAVVoiceOut *) hw;
  44     int rpos, decr, samples;
  45     uint8_t *dst;
  46     struct st_sample *src;
  47     int64_t now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
  48     int64_t ticks = now - wav->old_ticks;
  49     int64_t bytes =
  50         muldiv64(ticks, hw->info.bytes_per_second, NANOSECONDS_PER_SECOND);
  51
  52     if (bytes > INT_MAX) {
  53         samples = INT_MAX >> hw->info.shift;
  54     }
  55     else {
  56         samples = bytes >> hw->info.shift;
  57     }
  58
  59     wav->old_ticks = now;
  60     decr = audio_MIN (live, samples);
  61     samples = decr;
  62     rpos = hw->rpos;
  63     while (samples) {
  64         int left_till_end_samples = hw->samples - rpos;
  65         int convert_samples = audio_MIN (samples, left_till_end_samples);
  66
  67         src = hw->mix_buf + rpos;
  68         dst = advance (wav->pcm_buf, rpos << hw->info.shift);
  69
  70         hw->clip (dst, src, convert_samples);
  71         if (fwrite (dst, convert_samples << hw->info.shift, 1, wav->f) != 1) {
  72             dolog ("wav_run_out: fwrite of %d bytes failed\nReaons: %s\n",
  73                    convert_samples << hw->info.shift, strerror (errno));
  74         }
  75
  76         rpos = (rpos + convert_samples) % hw->samples;
  77         samples -= convert_samples;
  78         wav->total_samples += convert_samples;
  79     }
  80
  81     hw->rpos = rpos;
  82     return decr;
  83 }
  84
  85 static int wav_write_out (SWVoiceOut *sw, void *buf, int len)
  86 {
  87     return audio_pcm_sw_write (sw, buf, len);
  88 }
  89
  90 /* VICE code: Store number as little endian. */
  91 static void le_store (uint8_t *buf, uint32_t val, int len)
  92 {
  93     int i;
  94     for (i = 0; i < len; i++) {
  95         buf[i] = (uint8_t) (val & 0xff);
  96         val >>= 8;
  97     }
  98 }
  99
 100 static int wav_init_out(HWVoiceOut *hw, struct audsettings *as,
 101                         void *drv_opaque)
 102 {
 103     WAVVoiceOut *wav = (WAVVoiceOut *) hw;
 104     int bits16 = 0, stereo = 0;
 105     uint8_t hdr[] = {
 106         0x52, 0x49, 0x46, 0x46, 0x00, 0x00, 0x00, 0x00, 0x57, 0x41, 0x56,
 107         0x45, 0x66, 0x6d, 0x74, 0x20, 0x10, 0x00, 0x00, 0x00, 0x01, 0x00,
 108         0x02, 0x00, 0x44, 0xac, 0x00, 0x00, 0x10, 0xb1, 0x02, 0x00, 0x04,
 109         0x00, 0x10, 0x00, 0x64, 0x61, 0x74, 0x61, 0x00, 0x00, 0x00, 0x00
 110     };
 111     Audiodev *dev = drv_opaque;
 112     AudiodevWavOptions *wopts = &dev->u.wav;
 113     struct audsettings wav_as = audiodev_to_audsettings(dev->u.wav.out);
 114     const char *wav_path = wopts->has_path ? wopts->path : "qemu.wav";
 115
 116     stereo = wav_as.nchannels == 2;
 117     switch (wav_as.fmt) {
 118     case AUDIO_FORMAT_S8:
 119     case AUDIO_FORMAT_U8:
 120         bits16 = 0;
 121         break;
 122
 123     case AUDIO_FORMAT_S16:
 124     case AUDIO_FORMAT_U16:
 125         bits16 = 1;
 126         break;
 127
 128     case AUDIO_FORMAT_S32:
 129     case AUDIO_FORMAT_U32:
 130         dolog ("WAVE files can not handle 32bit formats\n");
 131         return -1;
 132
 133     default:
 134         abort();
 135     }
 136
 137     hdr[34] = bits16 ? 0x10 : 0x08;
 138
 139     wav_as.endianness = 0;
 140     audio_pcm_init_info (&hw->info, &wav_as);
 141
 142     hw->samples = 1024;
 143     wav->pcm_buf = audio_calloc(__func__, hw->samples, 1 << hw->info.shift);
 144     if (!wav->pcm_buf) {
 145         dolog ("Could not allocate buffer (%d bytes)\n",
 146                hw->samples << hw->info.shift);
 147         return -1;
 148     }
 149
 150     le_store (hdr + 22, hw->info.nchannels, 2);
 151     le_store (hdr + 24, hw->info.freq, 4);
 152     le_store (hdr + 28, hw->info.freq << (bits16 + stereo), 4);
 153     le_store (hdr + 32, 1 << (bits16 + stereo), 2);
 154
 155     wav->f = fopen(wav_path, "wb");
 156     if (!wav->f) {
 157         dolog ("Failed to open wave file `%s'\nReason: %s\n",
 158                wav_path, strerror(errno));
 159         g_free (wav->pcm_buf);
 160         wav->pcm_buf = NULL;
 161         return -1;
 162     }
 163
 164     if (fwrite (hdr, sizeof (hdr), 1, wav->f) != 1) {
 165         dolog ("wav_init_out: failed to write header\nReason: %s\n",
 166                strerror(errno));
 167         return -1;
 168     }
 169     return 0;
 170 }
 171
 172 static void wav_fini_out (HWVoiceOut *hw)
 173 {
 174     WAVVoiceOut *wav = (WAVVoiceOut *) hw;
 175     uint8_t rlen[4];
 176     uint8_t dlen[4];
 177     uint32_t datalen = wav->total_samples << hw->info.shift;
 178     uint32_t rifflen = datalen + 36;
 179
 180     if (!wav->f) {
 181         return;
 182     }
 183
 184     le_store (rlen, rifflen, 4);
 185     le_store (dlen, datalen, 4);
 186
 187     if (fseek (wav->f, 4, SEEK_SET)) {
 188         dolog ("wav_fini_out: fseek to rlen failed\nReason: %s\n",
 189                strerror(errno));
 190         goto doclose;
 191     }
 192     if (fwrite (rlen, 4, 1, wav->f) != 1) {
 193         dolog ("wav_fini_out: failed to write rlen\nReason: %s\n",
 194                strerror (errno));
 195         goto doclose;
 196     }
 197     if (fseek (wav->f, 32, SEEK_CUR)) {
 198         dolog ("wav_fini_out: fseek to dlen failed\nReason: %s\n",
 199                strerror (errno));
 200         goto doclose;
 201     }
 202     if (fwrite (dlen, 4, 1, wav->f) != 1) {
 203         dolog ("wav_fini_out: failed to write dlen\nReaons: %s\n",
 204                strerror (errno));
 205         goto doclose;
 206     }
 207
 208  doclose:
 209     if (fclose (wav->f))  {
 210         dolog ("wav_fini_out: fclose %p failed\nReason: %s\n",
 211                wav->f, strerror (errno));
 212     }
 213     wav->f = NULL;
 214
 215     g_free (wav->pcm_buf);
 216     wav->pcm_buf = NULL;
 217 }
 218
 219 static int wav_ctl_out (HWVoiceOut *hw, int cmd, ...)
 220 {
 221     (void) hw;
 222     (void) cmd;
 223     return 0;
 224 }
 225
 226 static void *wav_audio_init(Audiodev *dev)
 227 {
 228     assert(dev->driver == AUDIODEV_DRIVER_WAV);
 229     return dev;
 230 }
 231
 232 static void wav_audio_fini (void *opaque)
 233 {
 234     ldebug ("wav_fini");
 235 }
 236
 237 static struct audio_pcm_ops wav_pcm_ops = {
 238     .init_out = wav_init_out,
 239     .fini_out = wav_fini_out,
 240     .run_out  = wav_run_out,
 241     .write    = wav_write_out,
 242     .ctl_out  = wav_ctl_out,
 243 };
 244
 245 static struct audio_driver wav_audio_driver = {
 246     .name           = "wav",
 247     .descr          = "WAV renderer http://wikipedia.org/wiki/WAV",
 248     .init           = wav_audio_init,
 249     .fini           = wav_audio_fini,
 250     .pcm_ops        = &wav_pcm_ops,
 251     .can_be_default = 0,
 252     .max_voices_out = 1,
 253     .max_voices_in  = 0,
 254     .voice_size_out = sizeof (WAVVoiceOut),
 255     .voice_size_in  = 0
 256 };
 257
 258 static void register_audio_wav(void)
 259 {
 260     audio_driver_register(&wav_audio_driver);
 261 }
 262 type_init(register_audio_wav);