2 * QEMU WAV audio driver
4 * Copyright (c) 2004-2005 Vassili Karpov (malc)
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:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
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
26 #define AUDIO_CAP "wav"
27 #include "audio_int.h"
29 typedef struct WAVVoiceOut {
40 .wav_path = "qemu.wav"
43 static int wav_run_out (HWVoiceOut *hw)
45 WAVVoiceOut *wav = (WAVVoiceOut *) hw;
46 int rpos, live, decr, samples;
49 int64_t now = qemu_get_clock (vm_clock);
50 int64_t ticks = now - wav->old_ticks;
51 int64_t bytes = (ticks * hw->info.bytes_per_second) / ticks_per_sec;
53 if (bytes > INT_MAX) {
54 samples = INT_MAX >> hw->info.shift;
57 samples = bytes >> hw->info.shift;
60 live = audio_pcm_hw_get_live_out (hw);
66 decr = audio_MIN (live, samples);
70 int left_till_end_samples = hw->samples - rpos;
71 int convert_samples = audio_MIN (samples, left_till_end_samples);
73 src = hw->mix_buf + rpos;
74 dst = advance (wav->pcm_buf, rpos << hw->info.shift);
76 hw->clip (dst, src, convert_samples);
77 qemu_put_buffer (wav->f, dst, convert_samples << hw->info.shift);
78 mixeng_clear (src, convert_samples);
80 rpos = (rpos + convert_samples) % hw->samples;
81 samples -= convert_samples;
82 wav->total_samples += convert_samples;
89 static int wav_write_out (SWVoiceOut *sw, void *buf, int len)
91 return audio_pcm_sw_write (sw, buf, len);
94 /* VICE code: Store number as little endian. */
95 static void le_store (uint8_t *buf, uint32_t val, int len)
98 for (i = 0; i < len; i++) {
99 buf[i] = (uint8_t) (val & 0xff);
104 static int wav_init_out (HWVoiceOut *hw, int freq, int nchannels, audfmt_e fmt)
106 WAVVoiceOut *wav = (WAVVoiceOut *) hw;
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
115 freq = audio_state.fixed_freq_out;
116 fmt = audio_state.fixed_fmt_out;
117 nchannels = audio_state.fixed_channels_out;
131 dolog ("Internal logic error bad format %d\n", fmt);
135 hdr[34] = bits16 ? 0x10 : 0x08;
136 audio_pcm_init_info (
140 bits16 ? AUD_FMT_S16 : AUD_FMT_U8,
141 audio_need_to_swap_endian (0)
144 wav->pcm_buf = qemu_mallocz (hw->bufsize);
146 dolog ("Can not initialize WAV buffer of %d bytes\n",
151 le_store (hdr + 22, hw->info.nchannels, 2);
152 le_store (hdr + 24, hw->info.freq, 4);
153 le_store (hdr + 28, hw->info.freq << (bits16 + (nchannels == 2)), 4);
154 le_store (hdr + 32, 1 << (bits16 + (nchannels == 2)), 2);
156 wav->f = fopen (conf.wav_path, "wb");
158 dolog ("Failed to open wave file `%s'\nReason: %s\n",
159 conf.wav_path, strerror (errno));
160 qemu_free (wav->pcm_buf);
165 qemu_put_buffer (wav->f, hdr, sizeof (hdr));
169 static void wav_fini_out (HWVoiceOut *hw)
171 WAVVoiceOut *wav = (WAVVoiceOut *) hw;
172 int stereo = hw->info.nchannels == 2;
175 uint32_t rifflen = (wav->total_samples << stereo) + 36;
176 uint32_t datalen = wav->total_samples << stereo;
178 if (!wav->f || !hw->active) {
182 le_store (rlen, rifflen, 4);
183 le_store (dlen, datalen, 4);
185 qemu_fseek (wav->f, 4, SEEK_SET);
186 qemu_put_buffer (wav->f, rlen, 4);
188 qemu_fseek (wav->f, 32, SEEK_CUR);
189 qemu_put_buffer (wav->f, dlen, 4);
194 qemu_free (wav->pcm_buf);
198 static int wav_ctl_out (HWVoiceOut *hw, int cmd, ...)
205 static void *wav_audio_init (void)
210 static void wav_audio_fini (void *opaque)
216 struct audio_option wav_options[] = {
217 {"PATH", AUD_OPT_STR, &conf.wav_path,
218 "Path to wave file", NULL, 0},
219 {NULL, 0, NULL, NULL, NULL, 0}
222 struct audio_pcm_ops wav_pcm_ops = {
236 struct audio_driver wav_audio_driver = {
237 INIT_FIELD (name = ) "wav",
238 INIT_FIELD (descr = )
239 "WAV renderer http://wikipedia.org/wiki/WAV",
240 INIT_FIELD (options = ) wav_options,
241 INIT_FIELD (init = ) wav_audio_init,
242 INIT_FIELD (fini = ) wav_audio_fini,
243 INIT_FIELD (pcm_ops = ) &wav_pcm_ops,
244 INIT_FIELD (can_be_default = ) 0,
245 INIT_FIELD (max_voices_out = ) 1,
246 INIT_FIELD (max_voices_in = ) 0,
247 INIT_FIELD (voice_size_out = ) sizeof (WAVVoiceOut),
248 INIT_FIELD (voice_size_in = ) 0