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desmume
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More work on the alsa microphone so that it is near an usable state. Actually it 

does a pretty good job recognizing when i clap hands, decent when i blow,
epic fail when speaking. Progress nonetheless! \o/
This commit is contained in:
riccardom 2009-07-13 19:27:25 +00:00
parent f152bd98bb
commit 01af8a7453
1 changed files with 15 additions and 6 deletions
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21
desmume/src/mic_alsa.cpp
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@ -21,6 +21,7 @@
#include <alsa/asoundlib.h>
#include "types.h"
#include "mic.h"
#include "debug.h"
#define MIC_BUFSIZE 4096
@ -43,7 +44,7 @@ BOOL Mic_Init()
return TRUE;
// Open the default sound card in capture
if (snd_pcm_open(&pcm_handle, "plughw:0,0", SND_PCM_STREAM_CAPTURE, 0) < 0)
if (snd_pcm_open(&pcm_handle, "plughw:0,0", SND_PCM_STREAM_CAPTURE, SND_PCM_NONBLOCK) < 0)
return FALSE;
// Allocate the snd_pcm_hw_params_t structure and fill it.
@ -107,9 +108,19 @@ void Mic_DeInit()
snd_pcm_close(pcm_handle);
}
u8 Mic_ReadSample()
static void snd_pcm_read()
{
int error;
error = snd_pcm_readi(pcm_handle, Mic_Buffer[Mic_WriteBuf], MIC_BUFSIZE);
if (error < 0)
error = snd_pcm_recover(pcm_handle, error, 0);
if (error < 0)
LOG("snd_pcm_readi FAIL!: %s\n", snd_strerror(error));
}
u8 Mic_ReadSample()
{
u8 tmp;
u8 ret;
@ -122,15 +133,13 @@ u8 Mic_ReadSample()
ret = ((tmp & 0x1) << 7);
} else {
ret = ((tmp & 0xFE) >> 1);
snd_pcm_read();
}
Mic_BufPos++;
if (Mic_BufPos >= (MIC_BUFSIZE << 1)) {
snd_pcm_read();
Mic_BufPos = 0;
error = snd_pcm_readi(pcm_handle, Mic_Buffer[Mic_WriteBuf], MIC_BUFSIZE);
if (error < 1) {
printf("snd_pcm_readi FAIL!: %s\n", snd_strerror(error));
}
Mic_PlayBuf ^= 1;
Mic_WriteBuf ^= 1;
}