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