wavaudio.c (6452B)
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(&wav->rate, &hw->info, 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 .buffer_get_free = audio_generic_buffer_get_free, 201 .run_buffer_out = audio_generic_run_buffer_out, 202 .enable_out = wav_enable_out, 203 }; 204 205 static struct audio_driver wav_audio_driver = { 206 .name = "wav", 207 .descr = "WAV renderer http://wikipedia.org/wiki/WAV", 208 .init = wav_audio_init, 209 .fini = wav_audio_fini, 210 .pcm_ops = &wav_pcm_ops, 211 .can_be_default = 0, 212 .max_voices_out = 1, 213 .max_voices_in = 0, 214 .voice_size_out = sizeof (WAVVoiceOut), 215 .voice_size_in = 0 216 }; 217 218 static void register_audio_wav(void) 219 { 220 audio_driver_register(&wav_audio_driver); 221 } 222 type_init(register_audio_wav);