162 lines
3.8 KiB
C
162 lines
3.8 KiB
C
#include "hw/hw.h"
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#include "monitor.h"
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#include "audio.h"
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typedef struct {
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QEMUFile *f;
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int bytes;
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char *path;
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int freq;
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int bits;
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int nchannels;
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CaptureVoiceOut *cap;
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} WAVState;
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/* VICE code: Store number as little endian. */
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static void le_store (uint8_t *buf, uint32_t val, int len)
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{
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int i;
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for (i = 0; i < len; i++) {
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buf[i] = (uint8_t) (val & 0xff);
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val >>= 8;
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}
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}
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static void wav_notify (void *opaque, audcnotification_e cmd)
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{
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(void) opaque;
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(void) cmd;
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}
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static void wav_destroy (void *opaque)
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{
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WAVState *wav = opaque;
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uint8_t rlen[4];
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uint8_t dlen[4];
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uint32_t datalen = wav->bytes;
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uint32_t rifflen = datalen + 36;
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if (wav->f) {
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le_store (rlen, rifflen, 4);
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le_store (dlen, datalen, 4);
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qemu_fseek (wav->f, 4, SEEK_SET);
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qemu_put_buffer (wav->f, rlen, 4);
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qemu_fseek (wav->f, 32, SEEK_CUR);
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qemu_put_buffer (wav->f, dlen, 4);
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qemu_fclose (wav->f);
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}
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qemu_free (wav->path);
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}
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static void wav_capture (void *opaque, void *buf, int size)
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{
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WAVState *wav = opaque;
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qemu_put_buffer (wav->f, buf, size);
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wav->bytes += size;
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}
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static void wav_capture_destroy (void *opaque)
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{
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WAVState *wav = opaque;
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AUD_del_capture (wav->cap, wav);
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}
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static void wav_capture_info (void *opaque)
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{
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WAVState *wav = opaque;
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char *path = wav->path;
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monitor_printf(cur_mon, "Capturing audio(%d,%d,%d) to %s: %d bytes\n",
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wav->freq, wav->bits, wav->nchannels,
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path ? path : "<not available>", wav->bytes);
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}
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static struct capture_ops wav_capture_ops = {
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.destroy = wav_capture_destroy,
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.info = wav_capture_info
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};
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int wav_start_capture (CaptureState *s, const char *path, int freq,
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int bits, int nchannels)
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{
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Monitor *mon = cur_mon;
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WAVState *wav;
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uint8_t hdr[] = {
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0x52, 0x49, 0x46, 0x46, 0x00, 0x00, 0x00, 0x00, 0x57, 0x41, 0x56,
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0x45, 0x66, 0x6d, 0x74, 0x20, 0x10, 0x00, 0x00, 0x00, 0x01, 0x00,
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0x02, 0x00, 0x44, 0xac, 0x00, 0x00, 0x10, 0xb1, 0x02, 0x00, 0x04,
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0x00, 0x10, 0x00, 0x64, 0x61, 0x74, 0x61, 0x00, 0x00, 0x00, 0x00
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};
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struct audsettings as;
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struct audio_capture_ops ops;
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int stereo, bits16, shift;
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CaptureVoiceOut *cap;
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if (bits != 8 && bits != 16) {
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monitor_printf(mon, "incorrect bit count %d, must be 8 or 16\n", bits);
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return -1;
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}
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if (nchannels != 1 && nchannels != 2) {
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monitor_printf(mon, "incorrect channel count %d, must be 1 or 2\n",
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nchannels);
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return -1;
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}
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stereo = nchannels == 2;
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bits16 = bits == 16;
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as.freq = freq;
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as.nchannels = 1 << stereo;
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as.fmt = bits16 ? AUD_FMT_S16 : AUD_FMT_U8;
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as.endianness = 0;
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ops.notify = wav_notify;
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ops.capture = wav_capture;
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ops.destroy = wav_destroy;
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wav = qemu_mallocz (sizeof (*wav));
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shift = bits16 + stereo;
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hdr[34] = bits16 ? 0x10 : 0x08;
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le_store (hdr + 22, as.nchannels, 2);
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le_store (hdr + 24, freq, 4);
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le_store (hdr + 28, freq << shift, 4);
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le_store (hdr + 32, 1 << shift, 2);
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wav->f = qemu_fopen (path, "wb");
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if (!wav->f) {
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monitor_printf(mon, "Failed to open wave file `%s'\nReason: %s\n",
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path, strerror (errno));
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qemu_free (wav);
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return -1;
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}
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wav->path = qemu_strdup (path);
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wav->bits = bits;
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wav->nchannels = nchannels;
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wav->freq = freq;
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qemu_put_buffer (wav->f, hdr, sizeof (hdr));
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cap = AUD_add_capture (&as, &ops, wav);
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if (!cap) {
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monitor_printf(mon, "Failed to add audio capture\n");
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qemu_free (wav->path);
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qemu_fclose (wav->f);
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qemu_free (wav);
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return -1;
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}
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wav->cap = cap;
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s->opaque = wav;
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s->ops = wav_capture_ops;
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return 0;
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}
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