aboutsummaryrefslogtreecommitdiff
path: root/audio/wavaudio.c
blob: 950fa8f19c5fe5731036a21937f98640e379fef7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
/*
 * QEMU WAV audio driver
 *
 * Copyright (c) 2004-2005 Vassili Karpov (malc)
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
#include "hw/hw.h"
#include "qemu/timer.h"
#include "audio.h"

#define AUDIO_CAP "wav"
#include "audio_int.h"

typedef struct WAVVoiceOut {
    HWVoiceOut hw;
    FILE *f;
    int64_t old_ticks;
    void *pcm_buf;
    int total_samples;
} WAVVoiceOut;

static struct {
    struct audsettings settings;
    const char *wav_path;
} conf = {
    .settings.freq      = 44100,
    .settings.nchannels = 2,
    .settings.fmt       = AUD_FMT_S16,
    .wav_path           = "qemu.wav"
};

static int wav_run_out (HWVoiceOut *hw, int live)
{
    WAVVoiceOut *wav = (WAVVoiceOut *) hw;
    int rpos, decr, samples;
    uint8_t *dst;
    struct st_sample *src;
    int64_t now = qemu_get_clock_ns (vm_clock);
    int64_t ticks = now - wav->old_ticks;
    int64_t bytes =
        muldiv64 (ticks, hw->info.bytes_per_second, get_ticks_per_sec ());

    if (bytes > INT_MAX) {
        samples = INT_MAX >> hw->info.shift;
    }
    else {
        samples = bytes >> hw->info.shift;
    }

    wav->old_ticks = now;
    decr = audio_MIN (live, samples);
    samples = decr;
    rpos = hw->rpos;
    while (samples) {
        int left_till_end_samples = hw->samples - rpos;
        int convert_samples = audio_MIN (samples, left_till_end_samples);

        src = hw->mix_buf + rpos;
        dst = advance (wav->pcm_buf, rpos << hw->info.shift);

        hw->clip (dst, src, convert_samples);
        if (fwrite (dst, convert_samples << hw->info.shift, 1, wav->f) != 1) {
            dolog ("wav_run_out: fwrite of %d bytes failed\nReaons: %s\n",
                   convert_samples << hw->info.shift, strerror (errno));
        }

        rpos = (rpos + convert_samples) % hw->samples;
        samples -= convert_samples;
        wav->total_samples += convert_samples;
    }

    hw->rpos = rpos;
    return decr;
}

static int wav_write_out (SWVoiceOut *sw, void *buf, int len)
{
    return audio_pcm_sw_write (sw, buf, len);
}

/* VICE code: Store number as little endian. */
static void le_store (uint8_t *buf, uint32_t val, int len)
{
    int i;
    for (i = 0; i < len; i++) {
        buf[i] = (uint8_t) (val & 0xff);
        val >>= 8;
    }
}

static int wav_init_out (HWVoiceOut *hw, struct audsettings *as)
{
    WAVVoiceOut *wav = (WAVVoiceOut *) hw;
    int bits16 = 0, stereo = 0;
    uint8_t hdr[] = {
        0x52, 0x49, 0x46, 0x46, 0x00, 0x00, 0x00, 0x00, 0x57, 0x41, 0x56,
        0x45, 0x66, 0x6d, 0x74, 0x20, 0x10, 0x00, 0x00, 0x00, 0x01, 0x00,
        0x02, 0x00, 0x44, 0xac, 0x00, 0x00, 0x10, 0xb1, 0x02, 0x00, 0x04,
        0x00, 0x10, 0x00, 0x64, 0x61, 0x74, 0x61, 0x00, 0x00, 0x00, 0x00
    };
    struct audsettings wav_as = conf.settings;

    (void) as;

    stereo = wav_as.nchannels == 2;
    switch (wav_as.fmt) {
    case AUD_FMT_S8:
    case AUD_FMT_U8:
        bits16 = 0;
        break;

    case AUD_FMT_S16:
    case AUD_FMT_U16:
        bits16 = 1;
        break;

    case AUD_FMT_S32:
    case AUD_FMT_U32:
        dolog ("WAVE files can not handle 32bit formats\n");
        return -1;
    }

    hdr[34] = bits16 ? 0x10 : 0x08;

    wav_as.endianness = 0;
    audio_pcm_init_info (&hw->info, &wav_as);

    hw->samples = 1024;
    wav->pcm_buf = audio_calloc (AUDIO_FUNC, hw->samples, 1 << hw->info.shift);
    if (!wav->pcm_buf) {
        dolog ("Could not allocate buffer (%d bytes)\n",
               hw->samples << hw->info.shift);
        return -1;
    }

    le_store (hdr + 22, hw->info.nchannels, 2);
    le_store (hdr + 24, hw->info.freq, 4);
    le_store (hdr + 28, hw->info.freq << (bits16 + stereo), 4);
    le_store (hdr + 32, 1 << (bits16 + stereo), 2);

    wav->f = fopen (conf.wav_path, "wb");
    if (!wav->f) {
        dolog ("Failed to open wave file `%s'\nReason: %s\n",
               conf.wav_path, strerror (errno));
        g_free (wav->pcm_buf);
        wav->pcm_buf = NULL;
        return -1;
    }

    if (fwrite (hdr, sizeof (hdr), 1, wav->f) != 1) {
        dolog ("wav_init_out: failed to write header\nReason: %s\n",
               strerror(errno));
        return -1;
    }
    return 0;
}

static void wav_fini_out (HWVoiceOut *hw)
{
    WAVVoiceOut *wav = (WAVVoiceOut *) hw;
    uint8_t rlen[4];
    uint8_t dlen[4];
    uint32_t datalen = wav->total_samples << hw->info.shift;
    uint32_t rifflen = datalen + 36;

    if (!wav->f) {
        return;
    }

    le_store (rlen, rifflen, 4);
    le_store (dlen, datalen, 4);

    if (fseek (wav->f, 4, SEEK_SET)) {
        dolog ("wav_fini_out: fseek to rlen failed\nReason: %s\n",
               strerror(errno));
        goto doclose;
    }
    if (fwrite (rlen, 4, 1, wav->f) != 1) {
        dolog ("wav_fini_out: failed to write rlen\nReason: %s\n",
               strerror (errno));
        goto doclose;
    }
    if (fseek (wav->f, 32, SEEK_CUR)) {
        dolog ("wav_fini_out: fseek to dlen failed\nReason: %s\n",
               strerror (errno));
        goto doclose;
    }
    if (fwrite (dlen, 4, 1, wav->f) != 1) {
        dolog ("wav_fini_out: failed to write dlen\nReaons: %s\n",
               strerror (errno));
        goto doclose;
    }

 doclose:
    if (fclose (wav->f))  {
        dolog ("wav_fini_out: fclose %p failed\nReason: %s\n",
               wav->f, strerror (errno));
    }
    wav->f = NULL;

    g_free (wav->pcm_buf);
    wav->pcm_buf = NULL;
}

static int wav_ctl_out (HWVoiceOut *hw, int cmd, ...)
{
    (void) hw;
    (void) cmd;
    return 0;
}

static void *wav_audio_init (void)
{
    return &conf;
}

static void wav_audio_fini (void *opaque)
{
    (void) opaque;
    ldebug ("wav_fini");
}

static struct audio_option wav_options[] = {
    {
        .name  = "FREQUENCY",
        .tag   = AUD_OPT_INT,
        .valp  = &conf.settings.freq,
        .descr = "Frequency"
    },
    {
        .name  = "FORMAT",
        .tag   = AUD_OPT_FMT,
        .valp  = &conf.settings.fmt,
        .descr = "Format"
    },
    {
        .name  = "DAC_FIXED_CHANNELS",
        .tag   = AUD_OPT_INT,
        .valp  = &conf.settings.nchannels,
        .descr = "Number of channels (1 - mono, 2 - stereo)"
    },
    {
        .name  = "PATH",
        .tag   = AUD_OPT_STR,
        .valp  = &conf.wav_path,
        .descr = "Path to wave file"
    },
    { /* End of list */ }
};

static struct audio_pcm_ops wav_pcm_ops = {
    .init_out = wav_init_out,
    .fini_out = wav_fini_out,
    .run_out  = wav_run_out,
    .write    = wav_write_out,
    .ctl_out  = wav_ctl_out,
};

struct audio_driver wav_audio_driver = {
    .name           = "wav",
    .descr          = "WAV renderer http://wikipedia.org/wiki/WAV",
    .options        = wav_options,
    .init           = wav_audio_init,
    .fini           = wav_audio_fini,
    .pcm_ops        = &wav_pcm_ops,
    .can_be_default = 0,
    .max_voices_out = 1,
    .max_voices_in  = 0,
    .voice_size_out = sizeof (WAVVoiceOut),
    .voice_size_in  = 0
};