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PacBox: Premultiply sound prom data on load rather than during emulation. Use 16-bit data for 'raw' output instead of int.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@27208 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Michael Sevakis 2010-07-01 03:57:37 +00:00
parent f09370058f
commit ceab0b04eb
5 changed files with 26 additions and 21 deletions
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17
apps/plugins/pacbox/pacbox.c
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@ -281,9 +281,9 @@ static bool pacbox_menu(void)
static uint32_t sound_buf[NBSAMPLES];
#if CONFIG_CPU == MCF5249
/* Not enough to put this in IRAM */
static int raw_buf[NBSAMPLES];
static int16_t raw_buf[NBSAMPLES];
#else
static int raw_buf[NBSAMPLES] IBSS_ATTR;
static int16_t raw_buf[NBSAMPLES] IBSS_ATTR;
#endif
/*
@ -291,22 +291,23 @@ static int raw_buf[NBSAMPLES] IBSS_ATTR;
*/
static void get_more(unsigned char **start, size_t *size)
{
int i;
int32_t *out;
int *raw;
int32_t *out, *outend;
int16_t *raw;
/* Emulate the audio for the current register settings */
playSound(raw_buf, NBSAMPLES);
out = sound_buf;
outend = out + NBSAMPLES;
raw = raw_buf;
/* Normalize the audio and convert to stereo */
for (i = 0; i < NBSAMPLES; i++)
/* Convert to stereo */
do
{
uint32_t sample = (uint16_t)*raw++ << 6;
uint32_t sample = (uint16_t)*raw++;
*out++ = sample | (sample << 16);
}
while (out < outend);
*start = (unsigned char *)sound_buf;
*size = NBSAMPLES*sizeof(sound_buf[0]);