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Implement move callback for timestretch sample allocation.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30813 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Fred Bauer 2011-10-21 17:47:58 +00:00
parent 8e18dc85cf
commit d228d4d130
1 changed files with 51 additions and 23 deletions
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74
apps/dsp.c
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@ -19,6 +19,7 @@
*
****************************************************************************/
#include "config.h"
#include <stdbool.h>
#include <inttypes.h>
#include <string.h>
@ -210,6 +211,7 @@ static int treble; /* A/V */
/* Settings applicable to audio codec only */
#ifdef HAVE_PITCHSCREEN
static int32_t pitch_ratio = PITCH_SPEED_100;
static int big_sample_locks;
#endif
static int channels_mode;
long dsp_sw_gain;
@ -280,16 +282,34 @@ void sound_set_pitch(int32_t percent)
AUDIO_DSP.codec_frequency);
}
static void tdspeed_set_pointers( bool time_stretch_active )
{
if( time_stretch_active )
{
sample_buf_count = BIG_SAMPLE_BUF_COUNT;
resample_buf_count = BIG_RESAMPLE_BUF_COUNT;
sample_buf[0] = big_sample_buf[0];
sample_buf[1] = big_sample_buf[1];
resample_buf[0] = big_resample_buf[0];
resample_buf[1] = big_resample_buf[1];
}
else
{
sample_buf_count = SMALL_SAMPLE_BUF_COUNT;
resample_buf_count = SMALL_RESAMPLE_BUF_COUNT;
sample_buf[0] = small_sample_buf[0];
sample_buf[1] = small_sample_buf[1];
resample_buf[0] = small_resample_buf[0];
resample_buf[1] = small_resample_buf[1];
}
}
static void tdspeed_setup(struct dsp_config *dspc)
{
/* Assume timestretch will not be used */
dspc->tdspeed_active = false;
sample_buf[0] = small_sample_buf[0];
sample_buf[1] = small_sample_buf[1];
resample_buf[0] = small_resample_buf[0];
resample_buf[1] = small_resample_buf[1];
sample_buf_count = SMALL_SAMPLE_BUF_COUNT;
resample_buf_count = SMALL_RESAMPLE_BUF_COUNT;
tdspeed_set_pointers( false );
if (!dsp_timestretch_available())
return; /* Timestretch not enabled or buffer not allocated */
@ -305,23 +325,33 @@ static void tdspeed_setup(struct dsp_config *dspc)
/* Timestretch is to be used */
dspc->tdspeed_active = true;
sample_buf[0] = big_sample_buf[0];
sample_buf[1] = big_sample_buf[1];
resample_buf[0] = big_resample_buf[0];
resample_buf[1] = big_resample_buf[1];
sample_buf_count = BIG_SAMPLE_BUF_COUNT;
resample_buf_count = BIG_RESAMPLE_BUF_COUNT;
tdspeed_set_pointers( true );
}
static int move_callback(int handle, void* current, void* new)
{
/* TODO */
(void)handle;(void)current;;
(void)handle;(void)current;
if ( big_sample_locks > 0 )
return BUFLIB_CB_CANNOT_MOVE;
big_sample_buf = new;
/* no allocation without timestretch enabled */
tdspeed_set_pointers( true );
return BUFLIB_CB_OK;
}
void lock_sample_buf( bool lock )
{
if ( lock )
big_sample_locks++;
else
big_sample_locks--;
}
static struct buflib_callbacks ops = {
.move_callback = move_callback,
.shrink_callback = NULL,
@ -331,8 +361,7 @@ static struct buflib_callbacks ops = {
void dsp_timestretch_enable(bool enabled)
{
/* Hook to set up timestretch buffer on first call to settings_apply() */
static int handle;
static int handle = -1;
if (enabled)
{
if (big_sample_buf)
@ -340,12 +369,11 @@ void dsp_timestretch_enable(bool enabled)
/* Set up timestretch buffers */
big_sample_buf = &small_resample_buf[0];
handle = core_alloc_ex("resample buf",
2 * BIG_RESAMPLE_BUF_COUNT * sizeof(int32_t),
&ops);
enabled = handle > 0;
big_sample_locks = 0;
enabled = handle >= 0;
if (enabled)
{
@ -362,10 +390,10 @@ void dsp_timestretch_enable(bool enabled)
dsp_set_timestretch(PITCH_SPEED_100);
tdspeed_finish();
if (handle > 0)
if (handle >= 0)
core_free(handle);
handle = 0;
handle = -1;
big_sample_buf = NULL;
}
}
@ -784,12 +812,12 @@ static inline int resample(struct dsp_config *dsp, int count, int32_t *src[])
resample_buf[0],
resample_buf[1]
};
lock_sample_buf( true );
count = dsp->resample(count, &dsp->data, (const int32_t **)src, dst);
src[0] = dst[0];
src[1] = dst[dsp->data.num_channels - 1];
lock_sample_buf( false );
return count;
}