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Initial voice ui support for software codec platforms. Added also a

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beep when changing tracks.


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@7360 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Miika Pekkarinen 2005-08-20 11:13:19 +00:00
parent 329caa8ade
commit 159c52dd36
17 changed files with 774 additions and 230 deletions
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104
apps/pcmbuf.c
View file

@ -34,6 +34,7 @@
#include "buffer.h"
#include "settings.h"
#include "audio.h"
#include "dsp.h"
#define CHUNK_SIZE PCMBUF_GUARD
/* Must be a power of 2 */
@ -86,9 +87,11 @@ struct pcmbufdesc
volatile int pcmbuf_read_index;
volatile int pcmbuf_write_index;
int pcmbuf_unplayed_bytes;
int pcmbuf_mix_used_bytes;
int pcmbuf_watermark;
void (*pcmbuf_watermark_event)(int bytes_left);
static int last_chunksize;
static long mixpos = 0;
static void pcmbuf_boost(bool state)
{
@ -173,6 +176,7 @@ bool pcmbuf_add_chunk(void *addr, int size, void (*callback)(void))
pcmbuffers[pcmbuf_write_index].callback = callback;
pcmbuf_write_index = (pcmbuf_write_index+1) & NUM_PCM_BUFFERS_MASK;
pcmbuf_unplayed_bytes += size;
pcmbuf_mix_used_bytes = MAX(0, pcmbuf_mix_used_bytes - size);
return true;
}
else
@ -254,6 +258,7 @@ void pcmbuf_play_stop(void)
pcm_play_stop();
last_chunksize = 0;
pcmbuf_unplayed_bytes = 0;
pcmbuf_mix_used_bytes = 0;
pcmbuf_read_index = 0;
pcmbuf_write_index = 0;
audiobuffer_pos = 0;
@ -297,6 +302,13 @@ void pcmbuf_flush_audio(void)
crossfade_init = true;
}
/* Force playback. */
void pcmbuf_play_start(void)
{
if (!pcm_is_playing() && pcmbuf_unplayed_bytes)
pcm_play_data(pcmbuf_callback);
}
void pcmbuf_flush_fillpos(void)
{
int copy_n;
@ -562,6 +574,98 @@ bool pcmbuf_insert_buffer(char *buf, long length)
return true;
}
/* Generates a constant square wave sound with a given frequency
in Hertz for a duration in milliseconds. */
void pcmbuf_beep(int frequency, int duration, int amplitude)
{
int state = 0, count = 0;
int interval = NATIVE_FREQUENCY / frequency;
int pos;
short *buf = (short *)audiobuffer;
int bufsize = pcmbuf_size / 2;
/* FIXME: Should start playback. */
//if (pcmbuf_unplayed_bytes * 1000 < 4 * NATIVE_FREQUENCY * duration)
// return ;
pos = (audiobuffer_pos - pcmbuf_unplayed_bytes) / 2;
if (pos < 0)
pos += bufsize;
duration = NATIVE_FREQUENCY / 1000 * duration;
while (duration-- > 0)
{
if (state) {
buf[pos] = MIN(MAX(buf[pos] + amplitude, -32768), 32767);
if (++pos >= bufsize)
pos = 0;
buf[pos] = MIN(MAX(buf[pos] + amplitude, -32768), 32767);
} else {
buf[pos] = MIN(MAX(buf[pos] - amplitude, -32768), 32767);
if (++pos >= bufsize)
pos = 0;
buf[pos] = MIN(MAX(buf[pos] - amplitude, -32768), 32767);
}
if (++count >= interval)
{
count = 0;
if (state)
state = 0;
else
state = 1;
}
pos++;
if (pos >= bufsize)
pos = 0;
}
}
/* Returns pcm buffer usage in percents (0 to 100). */
int pcmbuf_usage(void)
{
return pcmbuf_unplayed_bytes * 100 / pcmbuf_size;
}
int pcmbuf_mix_usage(void)
{
return pcmbuf_mix_used_bytes * 100 / pcmbuf_unplayed_bytes;
}
void pcmbuf_reset_mixpos(void)
{
int bufsize = pcmbuf_size / 2;
pcmbuf_mix_used_bytes = 0;
mixpos = (audiobuffer_pos - pcmbuf_unplayed_bytes) / 2;
if (mixpos < 0)
mixpos += bufsize;
if (mixpos >= bufsize)
mixpos -= bufsize;
}
void pcmbuf_mix(char *buf, long length)
{
short *ibuf = (short *)buf;
short *obuf = (short *)audiobuffer;
int bufsize = pcmbuf_size / 2;
if (pcmbuf_mix_used_bytes == 0)
pcmbuf_reset_mixpos();
pcmbuf_mix_used_bytes += length;
length /= 2;
while (length-- > 0) {
obuf[mixpos] = MIN(MAX(obuf[mixpos] + *ibuf*4, -32768), 32767);
ibuf++;
mixpos++;
if (mixpos >= bufsize)
mixpos = 0;
}
}
void pcmbuf_crossfade_enable(bool on_off)
{
crossfade_enabled = on_off;