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
  25 #include "qemu/osdep.h"
  26 #include "qemu/host-utils.h"
  27 #include "qemu/module.h"
  28 #include "qemu/timer.h"
  29 #include "qapi/opts-visitor.h"
  30 #include "audio.h"
  31
  32 #define AUDIO_CAP "wav"
  33 #include "audio_int.h"
  34
  35 typedef struct WAVVoiceOut {
  36     HWVoiceOut hw;
  37     FILE *f;
  38     RateCtl rate;
  39     int total_samples;
  40 } WAVVoiceOut;
  41
  42 static size_t wav_write_out(HWVoiceOut *hw, void *buf, size_t len)
  43 {
  44     WAVVoiceOut *wav = (WAVVoiceOut *) hw;
  45     int64_t bytes = audio_rate_get_bytes(&hw->info, &wav->rate, len);
  46     assert(bytes % hw->info.bytes_per_frame == 0);
  47
  48     if (bytes && fwrite(buf, bytes, 1, wav->f) != 1) {
  49         dolog("wav_write_out: fwrite of %" PRId64 " bytes failed\nReason: %s\n",
  50               bytes, strerror(errno));
  51     }
  52
  53     wav->total_samples += bytes / hw->info.bytes_per_frame;
  54     return bytes;
  55 }
  56
  57 /* VICE code: Store number as little endian. */
  58 static void le_store (uint8_t *buf, uint32_t val, int len)
  59 {
  60     int i;
  61     for (i = 0; i < len; i++) {
  62         buf[i] = (uint8_t) (val & 0xff);
  63         val >>= 8;
  64     }
  65 }
  66
  67 static int wav_init_out(HWVoiceOut *hw, struct audsettings *as,
  68                         void *drv_opaque)
  69 {
  70     WAVVoiceOut *wav = (WAVVoiceOut *) hw;
  71     int bits16 = 0, stereo = 0;
  72     uint8_t hdr[] = {
  73         0x52, 0x49, 0x46, 0x46, 0x00, 0x00, 0x00, 0x00, 0x57, 0x41, 0x56,
  74         0x45, 0x66, 0x6d, 0x74, 0x20, 0x10, 0x00, 0x00, 0x00, 0x01, 0x00,
  75         0x02, 0x00, 0x44, 0xac, 0x00, 0x00, 0x10, 0xb1, 0x02, 0x00, 0x04,
  76         0x00, 0x10, 0x00, 0x64, 0x61, 0x74, 0x61, 0x00, 0x00, 0x00, 0x00
  77     };
  78     Audiodev *dev = drv_opaque;
  79     AudiodevWavOptions *wopts = &dev->u.wav;
  80     struct audsettings wav_as = audiodev_to_audsettings(dev->u.wav.out);
  81     const char *wav_path = wopts->has_path ? wopts->path : "qemu.wav";
  82
  83     stereo = wav_as.nchannels == 2;
  84     switch (wav_as.fmt) {
  85     case AUDIO_FORMAT_S8:
  86     case AUDIO_FORMAT_U8:
  87         bits16 = 0;
  88         break;
  89
  90     case AUDIO_FORMAT_S16:
  91     case AUDIO_FORMAT_U16:
  92         bits16 = 1;
  93         break;
  94
  95     case AUDIO_FORMAT_S32:
  96     case AUDIO_FORMAT_U32:
  97         dolog ("WAVE files can not handle 32bit formats\n");
  98         return -1;
  99
 100     default:
 101         abort();
 102     }
 103
 104     hdr[34] = bits16 ? 0x10 : 0x08;
 105
 106     wav_as.endianness = 0;
 107     audio_pcm_init_info (&hw->info, &wav_as);
 108
 109     hw->samples = 1024;
 110     le_store (hdr + 22, hw->info.nchannels, 2);
 111     le_store (hdr + 24, hw->info.freq, 4);
 112     le_store (hdr + 28, hw->info.freq << (bits16 + stereo), 4);
 113     le_store (hdr + 32, 1 << (bits16 + stereo), 2);
 114
 115     wav->f = fopen(wav_path, "wb");
 116     if (!wav->f) {
 117         dolog ("Failed to open wave file `%s'\nReason: %s\n",
 118                wav_path, strerror(errno));
 119         return -1;
 120     }
 121
 122     if (fwrite (hdr, sizeof (hdr), 1, wav->f) != 1) {
 123         dolog ("wav_init_out: failed to write header\nReason: %s\n",
 124                strerror(errno));
 125         return -1;
 126     }
 127
 128     audio_rate_start(&wav->rate);
 129     return 0;
 130 }
 131
 132 static void wav_fini_out (HWVoiceOut *hw)
 133 {
 134     WAVVoiceOut *wav = (WAVVoiceOut *) hw;
 135     uint8_t rlen[4];
 136     uint8_t dlen[4];
 137     uint32_t datalen = wav->total_samples * hw->info.bytes_per_frame;
 138     uint32_t rifflen = datalen + 36;
 139
 140     if (!wav->f) {
 141         return;
 142     }
 143
 144     le_store (rlen, rifflen, 4);
 145     le_store (dlen, datalen, 4);
 146
 147     if (fseek (wav->f, 4, SEEK_SET)) {
 148         dolog ("wav_fini_out: fseek to rlen failed\nReason: %s\n",
 149                strerror(errno));
 150         goto doclose;
 151     }
 152     if (fwrite (rlen, 4, 1, wav->f) != 1) {
 153         dolog ("wav_fini_out: failed to write rlen\nReason: %s\n",
 154                strerror (errno));
 155         goto doclose;
 156     }
 157     if (fseek (wav->f, 32, SEEK_CUR)) {
 158         dolog ("wav_fini_out: fseek to dlen failed\nReason: %s\n",
 159                strerror (errno));
 160         goto doclose;
 161     }
 162     if (fwrite (dlen, 4, 1, wav->f) != 1) {
 163         dolog ("wav_fini_out: failed to write dlen\nReaons: %s\n",
 164                strerror (errno));
 165         goto doclose;
 166     }
 167
 168  doclose:
 169     if (fclose (wav->f))  {
 170         dolog ("wav_fini_out: fclose %p failed\nReason: %s\n",
 171                wav->f, strerror (errno));
 172     }
 173     wav->f = NULL;
 174 }
 175
 176 static void wav_enable_out(HWVoiceOut *hw, bool enable)
 177 {
 178     WAVVoiceOut *wav = (WAVVoiceOut *) hw;
 179
 180     if (enable) {
 181         audio_rate_start(&wav->rate);
 182     }
 183 }
 184
 185 static void *wav_audio_init(Audiodev *dev)
 186 {
 187     assert(dev->driver == AUDIODEV_DRIVER_WAV);
 188     return dev;
 189 }
 190
 191 static void wav_audio_fini (void *opaque)
 192 {
 193     ldebug ("wav_fini");
 194 }
 195
 196 static struct audio_pcm_ops wav_pcm_ops = {
 197     .init_out = wav_init_out,
 198     .fini_out = wav_fini_out,
 199     .write    = wav_write_out,
 200     .run_buffer_out = audio_generic_run_buffer_out,
 201     .enable_out = wav_enable_out,
 202 };
 203
 204 static struct audio_driver wav_audio_driver = {
 205     .name           = "wav",
 206     .descr          = "WAV renderer http://wikipedia.org/wiki/WAV",
 207     .init           = wav_audio_init,
 208     .fini           = wav_audio_fini,
 209     .pcm_ops        = &wav_pcm_ops,
 210     .can_be_default = 0,
 211     .max_voices_out = 1,
 212     .max_voices_in  = 0,
 213     .voice_size_out = sizeof (WAVVoiceOut),
 214     .voice_size_in  = 0
 215 };
 216
 217 static void register_audio_wav(void)
 218 {
 219     audio_driver_register(&wav_audio_driver);
 220 }
 221 type_init(register_audio_wav);