1. Don't lock or unlock queue_guard during queue_clear.
It is locked when queue_clear is called, and it should remain so.
2. Protect runner_must_stop with queue_guard in
the request_espeak_stop function.
The following condition should always hold: queue_guard is locked while
testing or modifying runner_must_stop.
3. Rename stop_guard to acknowledge_guard. This is a more
descriptive name. This mutex simply protects the acknowledgement of
the stop request from being lost.
4. Remove the pthread_mutex_lock from the top of queue_process_entry,
because queue_guard is already locked when the function is called.
Most of the idea for this change came from William:
Renamed queue_runner to espeak_thread. Moved espeak initialization
and termination to espeak_thread. The while loops that process
the queue now use the variable should_run.
The goal is to create threads for the reader, que runner/espeak
processing and signal handling.
As of this commit, this code is still being worked on, so it is broken.
This adds retry processing back to the queue functions. queue_remove
should only be called after the head entry on the queue is processed
successfully.
espeak uses a sample rate of 22050 HZ, but let's not rely on that knowledge.
espeak_Initialize returns the sample rate on success,
so rely on that value when selecting a rate.
This commit updates the makefile and the documentation to explain how to
build alsa support. It has not been fully tested, so it is not built by
default. Also, I was able to remove the conditional compile directives
from the source.
The stop_speech function needs to test the return code from
espeak_Cancel() to be sure the operation was successful before
signaling the callback to stop the audio.
Make espeakup a multi-threaded program. One thread reads from the softsynth
device, queuing text and synthesis commands. The other thread processes
items from the queue.
This adds support for a --default-voice or -V (upper case) command line
option which will set the default voice espeakup uses. This takes a
name of an espeak voice -- for example:
espeakup --default-voice=en-us
or
espeakup -V en-us
