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1.1 root 1: /*
1.1.1.2 root 2: * QEMU WAV audio driver
3: *
4: * Copyright (c) 2004-2005 Vassili Karpov (malc)
5: *
1.1 root 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: */
1.1.1.5 root 24: #include "hw/hw.h"
25: #include "qemu-timer.h"
26: #include "audio.h"
1.1 root 27:
1.1.1.2 root 28: #define AUDIO_CAP "wav"
29: #include "audio_int.h"
1.1 root 30:
1.1.1.2 root 31: typedef struct WAVVoiceOut {
32: HWVoiceOut hw;
1.1 root 33: QEMUFile *f;
34: int64_t old_ticks;
35: void *pcm_buf;
36: int total_samples;
1.1.1.2 root 37: } WAVVoiceOut;
1.1 root 38:
39: static struct {
1.1.1.6 root 40: struct audsettings settings;
1.1 root 41: const char *wav_path;
42: } conf = {
1.1.1.7 ! root 43: .settings.freq = 44100,
! 44: .settings.nchannels = 2,
! 45: .settings.fmt = AUD_FMT_S16,
! 46: .wav_path = "qemu.wav"
1.1 root 47: };
48:
1.1.1.7 ! root 49: static int wav_run_out (HWVoiceOut *hw, int live)
1.1 root 50: {
1.1.1.2 root 51: WAVVoiceOut *wav = (WAVVoiceOut *) hw;
1.1.1.7 ! root 52: int rpos, decr, samples;
1.1 root 53: uint8_t *dst;
1.1.1.6 root 54: struct st_sample *src;
1.1 root 55: int64_t now = qemu_get_clock (vm_clock);
56: int64_t ticks = now - wav->old_ticks;
1.1.1.7 ! root 57: int64_t bytes =
! 58: muldiv64 (ticks, hw->info.bytes_per_second, get_ticks_per_sec ());
1.1 root 59:
1.1.1.2 root 60: if (bytes > INT_MAX) {
61: samples = INT_MAX >> hw->info.shift;
62: }
63: else {
64: samples = bytes >> hw->info.shift;
65: }
1.1 root 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:
1.1.1.2 root 75: src = hw->mix_buf + rpos;
76: dst = advance (wav->pcm_buf, rpos << hw->info.shift);
1.1 root 77:
78: hw->clip (dst, src, convert_samples);
1.1.1.2 root 79: qemu_put_buffer (wav->f, dst, convert_samples << hw->info.shift);
1.1 root 80:
81: rpos = (rpos + convert_samples) % hw->samples;
82: samples -= convert_samples;
83: wav->total_samples += convert_samples;
84: }
85:
86: hw->rpos = rpos;
1.1.1.2 root 87: return decr;
1.1 root 88: }
89:
1.1.1.2 root 90: static int wav_write_out (SWVoiceOut *sw, void *buf, int len)
1.1 root 91: {
1.1.1.2 root 92: return audio_pcm_sw_write (sw, buf, len);
1.1 root 93: }
94:
95: /* VICE code: Store number as little endian. */
96: static void le_store (uint8_t *buf, uint32_t val, int len)
97: {
98: int i;
99: for (i = 0; i < len; i++) {
100: buf[i] = (uint8_t) (val & 0xff);
101: val >>= 8;
102: }
103: }
104:
1.1.1.6 root 105: static int wav_init_out (HWVoiceOut *hw, struct audsettings *as)
1.1 root 106: {
1.1.1.2 root 107: WAVVoiceOut *wav = (WAVVoiceOut *) hw;
108: int bits16 = 0, stereo = 0;
1.1 root 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: };
1.1.1.6 root 115: struct audsettings wav_as = conf.settings;
1.1.1.2 root 116:
117: (void) as;
1.1 root 118:
1.1.1.2 root 119: stereo = wav_as.nchannels == 2;
120: switch (wav_as.fmt) {
1.1 root 121: case AUD_FMT_S8:
122: case AUD_FMT_U8:
1.1.1.2 root 123: bits16 = 0;
1.1 root 124: break;
125:
126: case AUD_FMT_S16:
127: case AUD_FMT_U16:
128: bits16 = 1;
129: break;
1.1.1.5 root 130:
131: case AUD_FMT_S32:
132: case AUD_FMT_U32:
133: dolog ("WAVE files can not handle 32bit formats\n");
134: return -1;
1.1 root 135: }
136:
137: hdr[34] = bits16 ? 0x10 : 0x08;
1.1.1.2 root 138:
1.1.1.3 root 139: wav_as.endianness = 0;
140: audio_pcm_init_info (&hw->info, &wav_as);
1.1.1.2 root 141:
142: hw->samples = 1024;
143: wav->pcm_buf = audio_calloc (AUDIO_FUNC, hw->samples, 1 << hw->info.shift);
144: if (!wav->pcm_buf) {
145: dolog ("Could not allocate buffer (%d bytes)\n",
146: hw->samples << hw->info.shift);
1.1 root 147: return -1;
1.1.1.2 root 148: }
1.1 root 149:
1.1.1.2 root 150: le_store (hdr + 22, hw->info.nchannels, 2);
151: le_store (hdr + 24, hw->info.freq, 4);
152: le_store (hdr + 28, hw->info.freq << (bits16 + stereo), 4);
1.1 root 153: le_store (hdr + 32, 1 << (bits16 + stereo), 2);
154:
1.1.1.4 root 155: wav->f = qemu_fopen (conf.wav_path, "wb");
1.1 root 156: if (!wav->f) {
1.1.1.2 root 157: dolog ("Failed to open wave file `%s'\nReason: %s\n",
1.1 root 158: conf.wav_path, strerror (errno));
159: qemu_free (wav->pcm_buf);
160: wav->pcm_buf = NULL;
161: return -1;
162: }
163:
164: qemu_put_buffer (wav->f, hdr, sizeof (hdr));
165: return 0;
166: }
167:
1.1.1.2 root 168: static void wav_fini_out (HWVoiceOut *hw)
1.1 root 169: {
1.1.1.2 root 170: WAVVoiceOut *wav = (WAVVoiceOut *) hw;
1.1 root 171: uint8_t rlen[4];
172: uint8_t dlen[4];
1.1.1.2 root 173: uint32_t datalen = wav->total_samples << hw->info.shift;
174: uint32_t rifflen = datalen + 36;
1.1 root 175:
1.1.1.2 root 176: if (!wav->f) {
1.1 root 177: return;
1.1.1.2 root 178: }
1.1 root 179:
180: le_store (rlen, rifflen, 4);
181: le_store (dlen, datalen, 4);
182:
183: qemu_fseek (wav->f, 4, SEEK_SET);
184: qemu_put_buffer (wav->f, rlen, 4);
185:
186: qemu_fseek (wav->f, 32, SEEK_CUR);
187: qemu_put_buffer (wav->f, dlen, 4);
188:
1.1.1.4 root 189: qemu_fclose (wav->f);
1.1 root 190: wav->f = NULL;
191:
192: qemu_free (wav->pcm_buf);
193: wav->pcm_buf = NULL;
194: }
195:
1.1.1.2 root 196: static int wav_ctl_out (HWVoiceOut *hw, int cmd, ...)
1.1 root 197: {
198: (void) hw;
199: (void) cmd;
200: return 0;
201: }
202:
203: static void *wav_audio_init (void)
204: {
205: return &conf;
206: }
207:
208: static void wav_audio_fini (void *opaque)
209: {
1.1.1.2 root 210: (void) opaque;
1.1 root 211: ldebug ("wav_fini");
212: }
213:
1.1.1.6 root 214: static struct audio_option wav_options[] = {
1.1.1.7 ! root 215: {
! 216: .name = "FREQUENCY",
! 217: .tag = AUD_OPT_INT,
! 218: .valp = &conf.settings.freq,
! 219: .descr = "Frequency"
! 220: },
! 221: {
! 222: .name = "FORMAT",
! 223: .tag = AUD_OPT_FMT,
! 224: .valp = &conf.settings.fmt,
! 225: .descr = "Format"
! 226: },
! 227: {
! 228: .name = "DAC_FIXED_CHANNELS",
! 229: .tag = AUD_OPT_INT,
! 230: .valp = &conf.settings.nchannels,
! 231: .descr = "Number of channels (1 - mono, 2 - stereo)"
! 232: },
! 233: {
! 234: .name = "PATH",
! 235: .tag = AUD_OPT_STR,
! 236: .valp = &conf.wav_path,
! 237: .descr = "Path to wave file"
! 238: },
! 239: { /* End of list */ }
1.1.1.2 root 240: };
241:
1.1.1.6 root 242: static struct audio_pcm_ops wav_pcm_ops = {
1.1.1.7 ! root 243: .init_out = wav_init_out,
! 244: .fini_out = wav_fini_out,
! 245: .run_out = wav_run_out,
! 246: .write = wav_write_out,
! 247: .ctl_out = wav_ctl_out,
1.1 root 248: };
249:
1.1.1.2 root 250: struct audio_driver wav_audio_driver = {
1.1.1.7 ! root 251: .name = "wav",
! 252: .descr = "WAV renderer http://wikipedia.org/wiki/WAV",
! 253: .options = wav_options,
! 254: .init = wav_audio_init,
! 255: .fini = wav_audio_fini,
! 256: .pcm_ops = &wav_pcm_ops,
! 257: .can_be_default = 0,
! 258: .max_voices_out = 1,
! 259: .max_voices_in = 0,
! 260: .voice_size_out = sizeof (WAVVoiceOut),
! 261: .voice_size_in = 0
1.1 root 262: };
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