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The voice PCM buffer has nothing to do with the playback PCM buffer any longer. Allocate it independently from the playback engine's PCM buffer and only when voice is required. Additionally, allocate actual space for the crossfade buffer only when using crossfade. Will save 18.3KB when neither is needed (10.3KB for voice and 8.0KB for crossfade).

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30133 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Michael Sevakis 2011-07-09 01:49:00 +00:00
parent d8cb05e31e
commit a802ebac06
2 changed files with 19 additions and 9 deletions
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12
apps/pcmbuf.c
View file

@ -467,22 +467,20 @@ static size_t get_next_required_pcmbuf_size(void)
}
/* Initialize the pcmbuffer the structure looks like this:
* ...|---------PCMBUF---------|FADEBUF|VOICEBUF|DESCS|... */
* ...|---------PCMBUF---------[|FADEBUF]|DESCS|... */
size_t pcmbuf_init(unsigned char *bufend)
{
unsigned char *voicebuf;
pcmbuf_bufend = bufend;
pcmbuf_size = get_next_required_pcmbuf_size();
write_chunk = (struct chunkdesc *)pcmbuf_bufend -
NUM_CHUNK_DESCS(pcmbuf_size);
voicebuf = (unsigned char *)write_chunk -
voicebuf_init((unsigned char *)write_chunk);
#ifdef HAVE_CROSSFADE
fadebuf = voicebuf - CROSSFADE_BUFSIZE;
fadebuf = (unsigned char *)write_chunk -
(crossfade_enable_request ? CROSSFADE_BUFSIZE : 0);
pcmbuffer = fadebuf - pcmbuf_size;
#else
pcmbuffer = voicebuf - pcmbuf_size;
pcmbuffer = (unsigned char *)write_chunk - pcmbuf_size;
#endif
init_pcmbuffers();

16
apps/playback.c
View file

@ -738,7 +738,7 @@ static void audio_reset_buffer(void)
{
/*
* Layout audio buffer as follows:
* [[|TALK]|SCRATCH|BUFFERING|PCM|]
* [[|TALK]|SCRATCH|BUFFERING|PCM|[VOICE|]]
*/
/* see audio_get_recording_buffer if this is modified */
@ -755,6 +755,18 @@ static void audio_reset_buffer(void)
ALIGN_BUFFER(filebuf, filebuflen, sizeof (intptr_t));
if (talk_voice_required())
{
/* Need a space for voice PCM output */
allocsize = voicebuf_init(filebuf + filebuflen);
allocsize = ALIGN_UP(allocsize, sizeof (intptr_t));
if (allocsize > filebuflen)
goto bufpanic;
filebuflen -= allocsize;
}
/* Subtract whatever the pcm buffer says it used plus the guard buffer */
allocsize = pcmbuf_init(filebuf + filebuflen);
@ -3475,7 +3487,7 @@ unsigned char * audio_get_buffer(bool talk_buf, size_t *buffer_size)
swap space */
logf("get buffer: audio");
buf = audiobuf + talk_get_bufsize();
end = audiobufend - pcmbuf_init(audiobufend);
end = audiobufend - voicebuf_init(audiobufend);
buffer_state = AUDIOBUF_STATE_VOICED_ONLY;
}