[U-Boot] [PATCH v2 06/22] dm: sandbox: Update sound to use two buffers

[sjg at google.com]

At present we use a single buffer for sound which means we cannot be
playing one sound while queueing up the next. This wouldn't matter except
that a long sound (more than a second) has to be created as a single
buffer, thus using a lot of memory. To better mimic what real sound
drivers do, add support for double buffering in sandbox.

Signed-off-by: Simon Glass <sjg at chromium.org>
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Changes in v2: None

 arch/sandbox/cpu/sdl.c | 88 ++++++++++++++++++++++++++++++------------
 1 file changed, 63 insertions(+), 25 deletions(-)

Applied to u-boot-dm/master