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Add an interface abstraction to the WebP worker thread implementation

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This allows custom implementations of threading mecanism.

Patch by Leonhard Gruenschloss.

Change-Id: Id8ea5917acd2f24fa8bce79748d1747de2751614
This commit is contained in:
skal
2014-06-12 11:35:44 +02:00
parent d6cd6358ff
commit 24e3080571
6 changed files with 165 additions and 103 deletions
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22
src/enc/analysis.c
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@ -420,7 +420,7 @@ static void MergeJobs(const SegmentJob* const src, SegmentJob* const dst) {
// initialize the job struct with some TODOs
static void InitSegmentJob(VP8Encoder* const enc, SegmentJob* const job,
int start_row, int end_row) {
WebPWorkerInit(&job->worker);
WebPGetWorkerInterface()->Init(&job->worker);
job->worker.data1 = job;
job->worker.data2 = &job->it;
job->worker.hook = (WebPWorkerHook)DoSegmentsJob;
@ -453,6 +453,8 @@ int VP8EncAnalyze(VP8Encoder* const enc) {
#else
const int do_mt = 0;
#endif
const WebPWorkerInterface* const worker_interface =
WebPGetWorkerInterface();
SegmentJob main_job;
if (do_mt) {
SegmentJob side_job;
@ -462,23 +464,23 @@ int VP8EncAnalyze(VP8Encoder* const enc) {
InitSegmentJob(enc, &side_job, split_row, last_row);
// we don't need to call Reset() on main_job.worker, since we're calling
// WebPWorkerExecute() on it
ok &= WebPWorkerReset(&side_job.worker);
ok &= worker_interface->Reset(&side_job.worker);
// launch the two jobs in parallel
if (ok) {
WebPWorkerLaunch(&side_job.worker);
WebPWorkerExecute(&main_job.worker);
ok &= WebPWorkerSync(&side_job.worker);
ok &= WebPWorkerSync(&main_job.worker);
worker_interface->Launch(&side_job.worker);
worker_interface->Execute(&main_job.worker);
ok &= worker_interface->Sync(&side_job.worker);
ok &= worker_interface->Sync(&main_job.worker);
}
WebPWorkerEnd(&side_job.worker);
worker_interface->End(&side_job.worker);
if (ok) MergeJobs(&side_job, &main_job); // merge results together
} else {
// Even for single-thread case, we use the generic Worker tools.
InitSegmentJob(enc, &main_job, 0, last_row);
WebPWorkerExecute(&main_job.worker);
ok &= WebPWorkerSync(&main_job.worker);
worker_interface->Execute(&main_job.worker);
ok &= worker_interface->Sync(&main_job.worker);
}
WebPWorkerEnd(&main_job.worker);
worker_interface->End(&main_job.worker);
if (ok) {
enc->alpha_ = main_job.alpha / total_mb;
enc->uv_alpha_ = main_job.uv_alpha / total_mb;