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