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#include "vl.h"
typedef struct {
QEMUFile *f;
int bytes;
char *path;
int freq;
int bits;
int nchannels;
CaptureVoiceOut *cap;
} WAVState;
/* 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 void wav_notify (void *opaque, audcnotification_e cmd)
{
(void) opaque;
(void) cmd;
}
static void wav_destroy (void *opaque)
{
WAVState *wav = opaque;
uint8_t rlen[4];
uint8_t dlen[4];
uint32_t datalen = wav->bytes;
uint32_t rifflen = datalen + 36;
if (!wav->f) {
return;
}
le_store (rlen, rifflen, 4);
le_store (dlen, datalen, 4);
qemu_fseek (wav->f, 4, SEEK_SET);
qemu_put_buffer (wav->f, rlen, 4);
qemu_fseek (wav->f, 32, SEEK_CUR);
qemu_put_buffer (wav->f, dlen, 4);
fclose (wav->f);
if (wav->path) {
qemu_free (wav->path);
}
}
static void wav_capture (void *opaque, void *buf, int size)
{
WAVState *wav = opaque;
qemu_put_buffer (wav->f, buf, size);
wav->bytes += size;
}
static void wav_capture_destroy (void *opaque)
{
WAVState *wav = opaque;
AUD_del_capture (wav->cap, wav);
}
static void wav_capture_info (void *opaque)
{
WAVState *wav = opaque;
char *path = wav->path;
term_printf ("Capturing audio(%d,%d,%d) to %s: %d bytes\n",
wav->freq, wav->bits, wav->nchannels,
path ? path : "<not available>", wav->bytes);
}
static struct capture_ops wav_capture_ops = {
.destroy = wav_capture_destroy,
.info = wav_capture_info
};
int wav_start_capture (CaptureState *s, const char *path, int freq,
int bits, int nchannels)
{
WAVState *wav;
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
};
audsettings_t as;
struct audio_capture_ops ops;
int stereo, bits16, shift;
CaptureVoiceOut *cap;
if (bits != 8 && bits != 16) {
term_printf ("incorrect bit count %d, must be 8 or 16\n", bits);
return -1;
}
if (nchannels != 1 && nchannels != 2) {
term_printf ("incorrect channel count %d, must be 1 or 2\n",
nchannels);
return -1;
}
stereo = nchannels == 2;
bits16 = bits == 16;
as.freq = freq;
as.nchannels = 1 << stereo;
as.fmt = bits16 ? AUD_FMT_S16 : AUD_FMT_U8;
as.endianness = 0;
ops.notify = wav_notify;
ops.capture = wav_capture;
ops.destroy = wav_destroy;
wav = qemu_mallocz (sizeof (*wav));
if (!wav) {
term_printf ("Could not allocate memory for wav capture (%zu bytes)",
sizeof (*wav));
return -1;
}
shift = bits16 + stereo;
hdr[34] = bits16 ? 0x10 : 0x08;
le_store (hdr + 22, as.nchannels, 2);
le_store (hdr + 24, freq, 4);
le_store (hdr + 28, freq << shift, 4);
le_store (hdr + 32, 1 << shift, 2);
wav->f = fopen (path, "wb");
if (!wav->f) {
term_printf ("Failed to open wave file `%s'\nReason: %s\n",
path, strerror (errno));
qemu_free (wav);
return -1;
}
wav->path = qemu_strdup (path);
wav->bits = bits;
wav->nchannels = nchannels;
wav->freq = freq;
qemu_put_buffer (wav->f, hdr, sizeof (hdr));
cap = AUD_add_capture (NULL, &as, &ops, wav);
if (!cap) {
term_printf ("Failed to add audio capture\n");
qemu_free (wav);
return -1;
}
wav->cap = cap;
s->opaque = wav;
s->ops = wav_capture_ops;
return 0;
}
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