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 "hw/hw.h"
  26 #include "qemu/timer.h"
  27 #include "audio.h"
  28
  29 #define AUDIO_CAP "wav"
  30 #include "audio_int.h"
  31
  32 typedef struct WAVVoiceOut {
  33     HWVoiceOut hw;
  34     FILE *f;
  35     int64_t old_ticks;
  36     void *pcm_buf;
  37     int total_samples;
  38 } WAVVoiceOut;
  39
  40 typedef struct {
  41     struct audsettings settings;
  42     const char *wav_path;
  43 } WAVConf;
  44
  45 static int wav_run_out (HWVoiceOut *hw, int live)
  46 {
  47     WAVVoiceOut *wav = (WAVVoiceOut *) hw;
  48     int rpos, decr, samples;
  49     uint8_t *dst;
  50     struct st_sample *src;
  51     int64_t now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
  52     int64_t ticks = now - wav->old_ticks;
  53     int64_t bytes =
  54         muldiv64 (ticks, hw->info.bytes_per_second, get_ticks_per_sec ());
  55
  56     if (bytes > INT_MAX) {
  57         samples = INT_MAX >> hw->info.shift;
  58     }
  59     else {
  60         samples = bytes >> hw->info.shift;
  61     }
  62
  63     wav->old_ticks = now;
  64     decr = audio_MIN (live, samples);
  65     samples = decr;
  66     rpos = hw->rpos;
  67     while (samples) {
  68         int left_till_end_samples = hw->samples - rpos;
  69         int convert_samples = audio_MIN (samples, left_till_end_samples);
  70
  71         src = hw->mix_buf + rpos;
  72         dst = advance (wav->pcm_buf, rpos << hw->info.shift);
  73
  74         hw->clip (dst, src, convert_samples);
  75         if (fwrite (dst, convert_samples << hw->info.shift, 1, wav->f) != 1) {
  76             dolog ("wav_run_out: fwrite of %d bytes failed\nReaons: %s\n",
  77                    convert_samples << hw->info.shift, strerror (errno));
  78         }
  79
  80         rpos = (rpos + convert_samples) % hw->samples;
  81         samples -= convert_samples;
  82         wav->total_samples += convert_samples;
  83     }
  84
  85     hw->rpos = rpos;
  86     return decr;
  87 }
  88
  89 static int wav_write_out (SWVoiceOut *sw, void *buf, int len)
  90 {
  91     return audio_pcm_sw_write (sw, buf, len);
  92 }
  93
  94 /* VICE code: Store number as little endian. */
  95 static void le_store (uint8_t *buf, uint32_t val, int len)
  96 {
  97     int i;
  98     for (i = 0; i < len; i++) {
  99         buf[i] = (uint8_t) (val & 0xff);
 100         val >>= 8;
 101     }
 102 }
 103
 104 static int wav_init_out(HWVoiceOut *hw, struct audsettings *as,
 105                         void *drv_opaque)
 106 {
 107     WAVVoiceOut *wav = (WAVVoiceOut *) hw;
 108     int bits16 = 0, stereo = 0;
 109     uint8_t hdr[] = {
 110         0x52, 0x49, 0x46, 0x46, 0x00, 0x00, 0x00, 0x00, 0x57, 0x41, 0x56,
 111         0x45, 0x66, 0x6d, 0x74, 0x20, 0x10, 0x00, 0x00, 0x00, 0x01, 0x00,
 112         0x02, 0x00, 0x44, 0xac, 0x00, 0x00, 0x10, 0xb1, 0x02, 0x00, 0x04,
 113         0x00, 0x10, 0x00, 0x64, 0x61, 0x74, 0x61, 0x00, 0x00, 0x00, 0x00
 114     };
 115     WAVConf *conf = drv_opaque;
 116     struct audsettings wav_as = conf->settings;
 117
 118     stereo = wav_as.nchannels == 2;
 119     switch (wav_as.fmt) {
 120     case AUD_FMT_S8:
 121     case AUD_FMT_U8:
 122         bits16 = 0;
 123         break;
 124
 125     case AUD_FMT_S16:
 126     case AUD_FMT_U16:
 127         bits16 = 1;
 128         break;
 129
 130     case AUD_FMT_S32:
 131     case AUD_FMT_U32:
 132         dolog ("WAVE files can not handle 32bit formats\n");
 133         return -1;
 134     }
 135
 136     hdr[34] = bits16 ? 0x10 : 0x08;
 137
 138     wav_as.endianness = 0;
 139     audio_pcm_init_info (&hw->info, &wav_as);
 140
 141     hw->samples = 1024;
 142     wav->pcm_buf = audio_calloc (AUDIO_FUNC, hw->samples, 1 << hw->info.shift);
 143     if (!wav->pcm_buf) {
 144         dolog ("Could not allocate buffer (%d bytes)\n",
 145                hw->samples << hw->info.shift);
 146         return -1;
 147     }
 148
 149     le_store (hdr + 22, hw->info.nchannels, 2);
 150     le_store (hdr + 24, hw->info.freq, 4);
 151     le_store (hdr + 28, hw->info.freq << (bits16 + stereo), 4);
 152     le_store (hdr + 32, 1 << (bits16 + stereo), 2);
 153
 154     wav->f = fopen (conf->wav_path, "wb");
 155     if (!wav->f) {
 156         dolog ("Failed to open wave file `%s'\nReason: %s\n",
 157                conf->wav_path, strerror (errno));
 158         g_free (wav->pcm_buf);
 159         wav->pcm_buf = NULL;
 160         return -1;
 161     }
 162
 163     if (fwrite (hdr, sizeof (hdr), 1, wav->f) != 1) {
 164         dolog ("wav_init_out: failed to write header\nReason: %s\n",
 165                strerror(errno));
 166         return -1;
 167     }
 168     return 0;
 169 }
 170
 171 static void wav_fini_out (HWVoiceOut *hw)
 172 {
 173     WAVVoiceOut *wav = (WAVVoiceOut *) hw;
 174     uint8_t rlen[4];
 175     uint8_t dlen[4];
 176     uint32_t datalen = wav->total_samples << hw->info.shift;
 177     uint32_t rifflen = datalen + 36;
 178
 179     if (!wav->f) {
 180         return;
 181     }
 182
 183     le_store (rlen, rifflen, 4);
 184     le_store (dlen, datalen, 4);
 185
 186     if (fseek (wav->f, 4, SEEK_SET)) {
 187         dolog ("wav_fini_out: fseek to rlen failed\nReason: %s\n",
 188                strerror(errno));
 189         goto doclose;
 190     }
 191     if (fwrite (rlen, 4, 1, wav->f) != 1) {
 192         dolog ("wav_fini_out: failed to write rlen\nReason: %s\n",
 193                strerror (errno));
 194         goto doclose;
 195     }
 196     if (fseek (wav->f, 32, SEEK_CUR)) {
 197         dolog ("wav_fini_out: fseek to dlen failed\nReason: %s\n",
 198                strerror (errno));
 199         goto doclose;
 200     }
 201     if (fwrite (dlen, 4, 1, wav->f) != 1) {
 202         dolog ("wav_fini_out: failed to write dlen\nReaons: %s\n",
 203                strerror (errno));
 204         goto doclose;
 205     }
 206
 207  doclose:
 208     if (fclose (wav->f))  {
 209         dolog ("wav_fini_out: fclose %p failed\nReason: %s\n",
 210                wav->f, strerror (errno));
 211     }
 212     wav->f = NULL;
 213
 214     g_free (wav->pcm_buf);
 215     wav->pcm_buf = NULL;
 216 }
 217
 218 static int wav_ctl_out (HWVoiceOut *hw, int cmd, ...)
 219 {
 220     (void) hw;
 221     (void) cmd;
 222     return 0;
 223 }
 224
 225 static WAVConf glob_conf = {
 226     .settings.freq      = 44100,
 227     .settings.nchannels = 2,
 228     .settings.fmt       = AUD_FMT_S16,
 229     .wav_path           = "qemu.wav"
 230 };
 231
 232 static void *wav_audio_init (void)
 233 {
 234     WAVConf *conf = g_malloc(sizeof(WAVConf));
 235     *conf = glob_conf;
 236     return conf;
 237 }
 238
 239 static void wav_audio_fini (void *opaque)
 240 {
 241     ldebug ("wav_fini");
 242     g_free(opaque);
 243 }
 244
 245 static struct audio_option wav_options[] = {
 246     {
 247         .name  = "FREQUENCY",
 248         .tag   = AUD_OPT_INT,
 249         .valp  = &glob_conf.settings.freq,
 250         .descr = "Frequency"
 251     },
 252     {
 253         .name  = "FORMAT",
 254         .tag   = AUD_OPT_FMT,
 255         .valp  = &glob_conf.settings.fmt,
 256         .descr = "Format"
 257     },
 258     {
 259         .name  = "DAC_FIXED_CHANNELS",
 260         .tag   = AUD_OPT_INT,
 261         .valp  = &glob_conf.settings.nchannels,
 262         .descr = "Number of channels (1 - mono, 2 - stereo)"
 263     },
 264     {
 265         .name  = "PATH",
 266         .tag   = AUD_OPT_STR,
 267         .valp  = &glob_conf.wav_path,
 268         .descr = "Path to wave file"
 269     },
 270     { /* End of list */ }
 271 };
 272
 273 static struct audio_pcm_ops wav_pcm_ops = {
 274     .init_out = wav_init_out,
 275     .fini_out = wav_fini_out,
 276     .run_out  = wav_run_out,
 277     .write    = wav_write_out,
 278     .ctl_out  = wav_ctl_out,
 279 };
 280
 281 struct audio_driver wav_audio_driver = {
 282     .name           = "wav",
 283     .descr          = "WAV renderer http://wikipedia.org/wiki/WAV",
 284     .options        = wav_options,
 285     .init           = wav_audio_init,
 286     .fini           = wav_audio_fini,
 287     .pcm_ops        = &wav_pcm_ops,
 288     .can_be_default = 0,
 289     .max_voices_out = 1,
 290     .max_voices_in  = 0,
 291     .voice_size_out = sizeof (WAVVoiceOut),
 292     .voice_size_in  = 0
 293 };