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audio fixes + initial audio capture support (malc)

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2040 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2006-07-04 16:51:32 +00:00
parent feea13e186
commit 8ead62cfc2
15 changed files with 514 additions and 54 deletions
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101
audio/wavcapture.c Normal file
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@ -0,0 +1,101 @@
#include "vl.h"
typedef struct {
QEMUFile *f;
int bytes;
} 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_state_cb (void *opaque, int enabled)
{
WAVState *wav = opaque;
if (!enabled) {
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);
}
else {
qemu_fseek (wav->f, 0, SEEK_END);
}
}
static void wav_capture_cb (void *opaque, void *buf, int size)
{
WAVState *wav = opaque;
qemu_put_buffer (wav->f, buf, size);
wav->bytes += size;
}
void wav_capture (const char *path, int freq, int bits16, int stereo)
{
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 shift;
stereo = !!stereo;
bits16 = !!bits16;
as.freq = freq;
as.nchannels = 1 << stereo;
as.fmt = bits16 ? AUD_FMT_S16 : AUD_FMT_U8;
ops.state = wav_state_cb;
ops.capture = wav_capture_cb;
wav = qemu_mallocz (sizeof (*wav));
if (!wav) {
AUD_log ("wav", "Could not allocate memory (%zu bytes)", sizeof (*wav));
return;
}
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) {
AUD_log ("wav", "Failed to open wave file `%s'\nReason: %s\n",
path, strerror (errno));
qemu_free (wav);
return;
}
qemu_put_buffer (wav->f, hdr, sizeof (hdr));
AUD_add_capture (NULL, &as, 0, &ops, wav);
}