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Buflib/swcodec: Improve playback stopping behavior on allocation.

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Reuse playback's Q_AUDIO_REMAKE_AUDIO_BUFFER capabilities to set the new
playback buffer, instead of stopping/restarting manual. This strongly
reduces the visibility of the short audio stop.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30480 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Thomas Martitz 2011-09-08 14:31:26 +00:00
parent 7337bcbf04
commit 87daeae7c2
1 changed files with 25 additions and 37 deletions
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62
apps/playback.c
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@ -744,7 +744,7 @@ size_t audio_buffer_available(void)
/* Set up the audio buffer for playback
* filebuflen must be pre-initialized with the maximum size */
static void audio_reset_buffer_noalloc(void* filebuf)
static void audio_reset_buffer_noalloc(void)
{
/*
* Layout audio buffer as follows:
@ -761,6 +761,7 @@ static void audio_reset_buffer_noalloc(void* filebuf)
/* Initially set up file buffer as all space available */
size_t allocsize;
void* filebuf = core_get_data(audiobuf_handle);
/* Subtract whatever voice needs */
allocsize = talkbuf_init(filebuf);
allocsize = ALIGN_UP(allocsize, sizeof (intptr_t));
@ -828,44 +829,30 @@ bufpanic:
/* Buffer must not move. */
static int shrink_callback(int handle, unsigned hints, void* start, size_t old_size)
{
long offset = audio_current_track()->offset;
int status = audio_status();
/* TODO: Do it without stopping playback, if possible */
/* don't call audio_hard_stop() as it frees this handle */
if (thread_self() == audio_thread_id)
{ /* inline case Q_AUDIO_STOP (audio_hard_stop() response
* if we're in the audio thread */
audio_stop_playback();
queue_clear(&audio_queue);
}
else
audio_queue_send(Q_AUDIO_STOP, 1);
#ifdef PLAYBACK_VOICE
voice_stop();
#endif
/* we should be free to change the buffer now */
size_t wanted_size = (hints & BUFLIB_SHRINK_SIZE_MASK);
ssize_t size = (ssize_t)old_size - wanted_size;
/* set final buffer size before calling audio_reset_buffer_noalloc() */
filebuflen = size;
switch (hints & BUFLIB_SHRINK_POS_MASK)
{
case BUFLIB_SHRINK_POS_BACK:
core_shrink(handle, start, size);
audio_reset_buffer_noalloc(start);
break;
case BUFLIB_SHRINK_POS_FRONT:
core_shrink(handle, start + wanted_size, size);
audio_reset_buffer_noalloc(start + wanted_size);
break;
}
if ((status & AUDIO_STATUS_PLAY) == AUDIO_STATUS_PLAY)
{
if (thread_self() == audio_thread_id)
audio_start_playback(offset, 0); /* inline Q_AUDIO_PLAY */
else
audio_play(offset);
/* set final buffer size before calling audio_start_playback()
* (which calls audio_reset_buffer_noalloc() which needs the new size) */
filebuflen = size;
/* TODO: Do it without stopping playback, if possible */
/* don't call audio_hard_stop() as it frees this handle */
if (thread_self() == audio_thread_id)
{ /* inline case Q_AUDIO_REMAKE_AUDIO_BUFFER to avoid deadlock if
* we're in the audio thread */
audio_start_playback(0, AUDIO_START_RESTART | AUDIO_START_NEWBUF);
}
else
audio_queue_send(Q_AUDIO_REMAKE_AUDIO_BUFFER, 0);
return BUFLIB_CB_OK;
}
@ -883,9 +870,8 @@ static void audio_reset_buffer(void)
audiobuf_handle = 0;
}
audiobuf_handle = core_alloc_maximum("audiobuf", &filebuflen, &ops);
unsigned char *filebuf = core_get_data(audiobuf_handle);
audio_reset_buffer_noalloc(filebuf);
audio_reset_buffer_noalloc();
}
/* Set the buffer margin to begin rebuffering when 'seconds' from empty */
@ -1949,14 +1935,6 @@ static int audio_fill_file_buffer(void)
if (play_status == PLAY_STOPPED)
return LOAD_TRACK_ERR_FAILED;
trigger_cpu_boost();
/* Must reset the buffer before use if trashed or voice only - voice
file size shouldn't have changed so we can go straight from
AUDIOBUF_STATE_VOICED_ONLY to AUDIOBUF_STATE_INITIALIZED */
if (buffer_state != AUDIOBUF_STATE_INITIALIZED)
audio_reset_buffer();
logf("Starting buffer fill");
int trackstat = audio_load_track();
@ -2467,7 +2445,17 @@ static void audio_start_playback(size_t offset, unsigned int flags)
send_event(PLAYBACK_EVENT_START_PLAYBACK, NULL);
}
/* Fill the buffer */
/* Must reset the buffer before use if trashed or voice only - voice
file size shouldn't have changed so we can go straight from
AUDIOBUF_STATE_VOICED_ONLY to AUDIOBUF_STATE_INITIALIZED */
if (buffer_state != AUDIOBUF_STATE_INITIALIZED)
{
/* If not alloced, that must be done as well */
audiobuf_handle <= 0 ?
audio_reset_buffer() : audio_reset_buffer_noalloc();
}
/* Fill the buffer, assumed to be setup already here, thus realloc=false */
int trackstat = audio_fill_file_buffer();
if (trackstat >= LOAD_TRACK_OK)