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24#include "hw/hw.h"
25#include "qemu-timer.h"
26#include "audio.h"
27
28#define AUDIO_CAP "wav"
29#include "audio_int.h"
30
31typedef struct WAVVoiceOut {
32 HWVoiceOut hw;
33 QEMUFile *f;
34 int64_t old_ticks;
35 void *pcm_buf;
36 int total_samples;
37} WAVVoiceOut;
38
39static struct {
40 struct audsettings settings;
41 const char *wav_path;
42} conf = {
43 .settings.freq = 44100,
44 .settings.nchannels = 2,
45 .settings.fmt = AUD_FMT_S16,
46 .wav_path = "qemu.wav"
47};
48
49static int wav_run_out (HWVoiceOut *hw, int live)
50{
51 WAVVoiceOut *wav = (WAVVoiceOut *) hw;
52 int rpos, decr, samples;
53 uint8_t *dst;
54 struct st_sample *src;
55 int64_t now = qemu_get_clock (vm_clock);
56 int64_t ticks = now - wav->old_ticks;
57 int64_t bytes =
58 muldiv64 (ticks, hw->info.bytes_per_second, get_ticks_per_sec ());
59
60 if (bytes > INT_MAX) {
61 samples = INT_MAX >> hw->info.shift;
62 }
63 else {
64 samples = bytes >> hw->info.shift;
65 }
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
75 src = hw->mix_buf + rpos;
76 dst = advance (wav->pcm_buf, rpos << hw->info.shift);
77
78 hw->clip (dst, src, convert_samples);
79 qemu_put_buffer (wav->f, dst, convert_samples << hw->info.shift);
80
81 rpos = (rpos + convert_samples) % hw->samples;
82 samples -= convert_samples;
83 wav->total_samples += convert_samples;
84 }
85
86 hw->rpos = rpos;
87 return decr;
88}
89
90static int wav_write_out (SWVoiceOut *sw, void *buf, int len)
91{
92 return audio_pcm_sw_write (sw, buf, len);
93}
94
95
96static 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
105static int wav_init_out (HWVoiceOut *hw, struct audsettings *as)
106{
107 WAVVoiceOut *wav = (WAVVoiceOut *) hw;
108 int bits16 = 0, stereo = 0;
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 };
115 struct audsettings wav_as = conf.settings;
116
117 (void) as;
118
119 stereo = wav_as.nchannels == 2;
120 switch (wav_as.fmt) {
121 case AUD_FMT_S8:
122 case AUD_FMT_U8:
123 bits16 = 0;
124 break;
125
126 case AUD_FMT_S16:
127 case AUD_FMT_U16:
128 bits16 = 1;
129 break;
130
131 case AUD_FMT_S32:
132 case AUD_FMT_U32:
133 dolog ("WAVE files can not handle 32bit formats\n");
134 return -1;
135 }
136
137 hdr[34] = bits16 ? 0x10 : 0x08;
138
139 wav_as.endianness = 0;
140 audio_pcm_init_info (&hw->info, &wav_as);
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);
147 return -1;
148 }
149
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);
153 le_store (hdr + 32, 1 << (bits16 + stereo), 2);
154
155 wav->f = qemu_fopen (conf.wav_path, "wb");
156 if (!wav->f) {
157 dolog ("Failed to open wave file `%s'\nReason: %s\n",
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
168static void wav_fini_out (HWVoiceOut *hw)
169{
170 WAVVoiceOut *wav = (WAVVoiceOut *) hw;
171 uint8_t rlen[4];
172 uint8_t dlen[4];
173 uint32_t datalen = wav->total_samples << hw->info.shift;
174 uint32_t rifflen = datalen + 36;
175
176 if (!wav->f) {
177 return;
178 }
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
189 qemu_fclose (wav->f);
190 wav->f = NULL;
191
192 qemu_free (wav->pcm_buf);
193 wav->pcm_buf = NULL;
194}
195
196static int wav_ctl_out (HWVoiceOut *hw, int cmd, ...)
197{
198 (void) hw;
199 (void) cmd;
200 return 0;
201}
202
203static void *wav_audio_init (void)
204{
205 return &conf;
206}
207
208static void wav_audio_fini (void *opaque)
209{
210 (void) opaque;
211 ldebug ("wav_fini");
212}
213
214static struct audio_option wav_options[] = {
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 { }
240};
241
242static struct audio_pcm_ops wav_pcm_ops = {
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,
248};
249
250struct audio_driver wav_audio_driver = {
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
262};
263
