![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to wavaudio.c CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [Qemu by Fabrice Bellard] / qemu / audio|
Return to wavaudio.c CVS log | Up to [Qemu by Fabrice Bellard] / qemu / audio |
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: */
24: #include "vl.h"
25:
1.1.1.2 root 26: #define AUDIO_CAP "wav"
27: #include "audio_int.h"
1.1 root 28:
1.1.1.2 root 29: typedef struct WAVVoiceOut {
30: HWVoiceOut hw;
1.1 root 31: QEMUFile *f;
32: int64_t old_ticks;
33: void *pcm_buf;
34: int total_samples;
1.1.1.2 root 35: } WAVVoiceOut;
1.1 root 36:
37: static struct {
1.1.1.2 root 38: audsettings_t settings;
1.1 root 39: const char *wav_path;
40: } conf = {
1.1.1.2 root 41: {
42: 44100,
43: 2,
44: AUD_FMT_S16
45: },
46: "qemu.wav"
1.1 root 47: };
48:
1.1.1.2 root 49: static int wav_run_out (HWVoiceOut *hw)
1.1 root 50: {
1.1.1.2 root 51: WAVVoiceOut *wav = (WAVVoiceOut *) hw;
1.1 root 52: int rpos, live, decr, samples;
53: uint8_t *dst;
54: st_sample_t *src;
55: int64_t now = qemu_get_clock (vm_clock);
56: int64_t ticks = now - wav->old_ticks;
1.1.1.2 root 57: int64_t bytes = (ticks * hw->info.bytes_per_second) / ticks_per_sec;
1.1 root 58:
1.1.1.2 root 59: if (bytes > INT_MAX) {
60: samples = INT_MAX >> hw->info.shift;
61: }
62: else {
63: samples = bytes >> hw->info.shift;
64: }
1.1 root 65:
1.1.1.2 root 66: live = audio_pcm_hw_get_live_out (hw);
67: if (!live) {
68: return 0;
69: }
1.1 root 70:
71: wav->old_ticks = now;
72: decr = audio_MIN (live, samples);
73: samples = decr;
74: rpos = hw->rpos;
75: while (samples) {
76: int left_till_end_samples = hw->samples - rpos;
77: int convert_samples = audio_MIN (samples, left_till_end_samples);
78:
1.1.1.2 root 79: src = hw->mix_buf + rpos;
80: dst = advance (wav->pcm_buf, rpos << hw->info.shift);
1.1 root 81:
82: hw->clip (dst, src, convert_samples);
1.1.1.2 root 83: qemu_put_buffer (wav->f, dst, convert_samples << hw->info.shift);
1.1 root 84:
85: rpos = (rpos + convert_samples) % hw->samples;
86: samples -= convert_samples;
87: wav->total_samples += convert_samples;
88: }
89:
90: hw->rpos = rpos;
1.1.1.2 root 91: return decr;
1.1 root 92: }
93:
1.1.1.2 root 94: static int wav_write_out (SWVoiceOut *sw, void *buf, int len)
1.1 root 95: {
1.1.1.2 root 96: return audio_pcm_sw_write (sw, buf, len);
1.1 root 97: }
98:
99: /* VICE code: Store number as little endian. */
100: static void le_store (uint8_t *buf, uint32_t val, int len)
101: {
102: int i;
103: for (i = 0; i < len; i++) {
104: buf[i] = (uint8_t) (val & 0xff);
105: val >>= 8;
106: }
107: }
108:
1.1.1.2 root 109: static int wav_init_out (HWVoiceOut *hw, audsettings_t *as)
1.1 root 110: {
1.1.1.2 root 111: WAVVoiceOut *wav = (WAVVoiceOut *) hw;
112: int bits16 = 0, stereo = 0;
1.1 root 113: uint8_t hdr[] = {
114: 0x52, 0x49, 0x46, 0x46, 0x00, 0x00, 0x00, 0x00, 0x57, 0x41, 0x56,
115: 0x45, 0x66, 0x6d, 0x74, 0x20, 0x10, 0x00, 0x00, 0x00, 0x01, 0x00,
116: 0x02, 0x00, 0x44, 0xac, 0x00, 0x00, 0x10, 0xb1, 0x02, 0x00, 0x04,
117: 0x00, 0x10, 0x00, 0x64, 0x61, 0x74, 0x61, 0x00, 0x00, 0x00, 0x00
118: };
1.1.1.2 root 119: audsettings_t wav_as = conf.settings;
120:
121: (void) as;
1.1 root 122:
1.1.1.2 root 123: stereo = wav_as.nchannels == 2;
124: switch (wav_as.fmt) {
1.1 root 125: case AUD_FMT_S8:
126: case AUD_FMT_U8:
1.1.1.2 root 127: bits16 = 0;
1.1 root 128: break;
129:
130: case AUD_FMT_S16:
131: case AUD_FMT_U16:
132: bits16 = 1;
133: break;
134: }
135:
136: hdr[34] = bits16 ? 0x10 : 0x08;
1.1.1.2 root 137:
1.1.1.3 ! root 138: wav_as.endianness = 0;
! 139: audio_pcm_init_info (&hw->info, &wav_as);
1.1.1.2 root 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);
1.1 root 146: return -1;
1.1.1.2 root 147: }
1.1 root 148:
1.1.1.2 root 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);
1.1 root 152: le_store (hdr + 32, 1 << (bits16 + stereo), 2);
153:
154: wav->f = fopen (conf.wav_path, "wb");
155: if (!wav->f) {
1.1.1.2 root 156: dolog ("Failed to open wave file `%s'\nReason: %s\n",
1.1 root 157: conf.wav_path, strerror (errno));
158: qemu_free (wav->pcm_buf);
159: wav->pcm_buf = NULL;
160: return -1;
161: }
162:
163: qemu_put_buffer (wav->f, hdr, sizeof (hdr));
164: return 0;
165: }
166:
1.1.1.2 root 167: static void wav_fini_out (HWVoiceOut *hw)
1.1 root 168: {
1.1.1.2 root 169: WAVVoiceOut *wav = (WAVVoiceOut *) hw;
1.1 root 170: uint8_t rlen[4];
171: uint8_t dlen[4];
1.1.1.2 root 172: uint32_t datalen = wav->total_samples << hw->info.shift;
173: uint32_t rifflen = datalen + 36;
1.1 root 174:
1.1.1.2 root 175: if (!wav->f) {
1.1 root 176: return;
1.1.1.2 root 177: }
1.1 root 178:
179: le_store (rlen, rifflen, 4);
180: le_store (dlen, datalen, 4);
181:
182: qemu_fseek (wav->f, 4, SEEK_SET);
183: qemu_put_buffer (wav->f, rlen, 4);
184:
185: qemu_fseek (wav->f, 32, SEEK_CUR);
186: qemu_put_buffer (wav->f, dlen, 4);
187:
188: fclose (wav->f);
189: wav->f = NULL;
190:
191: qemu_free (wav->pcm_buf);
192: wav->pcm_buf = NULL;
193: }
194:
1.1.1.2 root 195: static int wav_ctl_out (HWVoiceOut *hw, int cmd, ...)
1.1 root 196: {
197: (void) hw;
198: (void) cmd;
199: return 0;
200: }
201:
202: static void *wav_audio_init (void)
203: {
204: return &conf;
205: }
206:
207: static void wav_audio_fini (void *opaque)
208: {
1.1.1.2 root 209: (void) opaque;
1.1 root 210: ldebug ("wav_fini");
211: }
212:
1.1.1.2 root 213: struct audio_option wav_options[] = {
214: {"FREQUENCY", AUD_OPT_INT, &conf.settings.freq,
215: "Frequency", NULL, 0},
216:
217: {"FORMAT", AUD_OPT_FMT, &conf.settings.fmt,
218: "Format", NULL, 0},
219:
220: {"DAC_FIXED_CHANNELS", AUD_OPT_INT, &conf.settings.nchannels,
221: "Number of channels (1 - mono, 2 - stereo)", NULL, 0},
222:
223: {"PATH", AUD_OPT_STR, &conf.wav_path,
224: "Path to wave file", NULL, 0},
225: {NULL, 0, NULL, NULL, NULL, 0}
226: };
227:
228: struct audio_pcm_ops wav_pcm_ops = {
229: wav_init_out,
230: wav_fini_out,
231: wav_run_out,
232: wav_write_out,
233: wav_ctl_out,
234:
235: NULL,
236: NULL,
237: NULL,
238: NULL,
239: NULL
1.1 root 240: };
241:
1.1.1.2 root 242: struct audio_driver wav_audio_driver = {
243: INIT_FIELD (name = ) "wav",
244: INIT_FIELD (descr = )
245: "WAV renderer http://wikipedia.org/wiki/WAV",
246: INIT_FIELD (options = ) wav_options,
247: INIT_FIELD (init = ) wav_audio_init,
248: INIT_FIELD (fini = ) wav_audio_fini,
249: INIT_FIELD (pcm_ops = ) &wav_pcm_ops,
250: INIT_FIELD (can_be_default = ) 0,
251: INIT_FIELD (max_voices_out = ) 1,
252: INIT_FIELD (max_voices_in = ) 0,
253: INIT_FIELD (voice_size_out = ) sizeof (WAVVoiceOut),
254: INIT_FIELD (voice_size_in = ) 0
1.1 root 255: };
This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.