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Store recorded peak values in short; this should fix an issue where clipping wasn't always detected. Also removed an obsolete function.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@8852 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Peter D'Hoye 2006-02-26 22:42:23 +00:00
parent 62f55b8209
commit a6b913fdfb
1 changed files with 5 additions and 37 deletions
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42
firmware/pcm_record.c
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@ -67,7 +67,7 @@ static char recording_filename[MAX_PATH];
static volatile bool init_done, close_done, record_done, stop_done, pause_done, resume_done, new_file_done; static volatile bool init_done, close_done, record_done, stop_done, pause_done, resume_done, new_file_done;
static int peak_left, peak_right; static short peak_left, peak_right;
/***************************************************************************/ /***************************************************************************/
@ -353,52 +353,20 @@ void audio_resume_recording(void)
wake_up_thread(); wake_up_thread();
} }
/* return peaks as int, so convert from short first
note that peak values are always positive */
void pcm_rec_get_peaks(int *left, int *right) void pcm_rec_get_peaks(int *left, int *right)
{ {
if (left) if (left)
*left = peak_left; *left = (int)peak_left;
if (right) if (right)
*right = peak_right; *right = (int)peak_right;
} }
/***************************************************************************/ /***************************************************************************/
/* Functions that executes in the context of pcmrec_thread */ /* Functions that executes in the context of pcmrec_thread */
/***************************************************************************/ /***************************************************************************/
/* Skip PEAK_STRIDE sample-pairs for each compare
#define PEAK_STRIDE 3
static void pcmrec_find_peaks(int chunk, int* peak_l, int* peak_r)
{
short *ptr, value;
int j;
if(!peak_l || ! peak_r) return;
ptr = GET_CHUNK(chunk);
*peak_l = 0;
*peak_r = 0;
for (j=0; j<CHUNK_SIZE/4; j+=PEAK_STRIDE+1)
{
if ((value = ptr[0]) > *peak_l)
*peak_l = value;
else if (-value > *peak_l)
*peak_l = -value;
ptr++;
if ((value = ptr[0]) > *peak_r)
*peak_r = value;
else if (-value > *peak_r)
*peak_r = -value;
ptr++;
ptr += PEAK_STRIDE * 2;
}
}
*/
/** /**
* Process the chunks using read_index and write_index. * Process the chunks using read_index and write_index.
* *