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author | James Zern <jzern@google.com> | 2013-07-30 22:46:58 -0700 |
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committer | James Zern <jzern@google.com> | 2013-08-05 13:21:13 -0700 |
commit | 183b77d5ab2a4966b71be2e36eb171b44a3f2ae9 (patch) | |
tree | 8e0f3fa470ec720357f35c5b3e8ad5179cb1b6f0 /vp9/decoder/vp9_thread.h | |
parent | 18cb8bdd206596b6a18c2d6a0258dd54b008a7f6 (diff) | |
download | libvpx-183b77d5ab2a4966b71be2e36eb171b44a3f2ae9.tar libvpx-183b77d5ab2a4966b71be2e36eb171b44a3f2ae9.tar.gz libvpx-183b77d5ab2a4966b71be2e36eb171b44a3f2ae9.tar.bz2 libvpx-183b77d5ab2a4966b71be2e36eb171b44a3f2ae9.zip |
vp9/decoder: add thread worker
vp9/decoder/vp9_thread.[hc]
Original source:
http://git.chromium.org/webm/libwebp.git
100644 blob b1615d0fb8d311666b2fa4561076c62d72c2e3ff src/utils/thread.c
100644 blob 13a61a4c84194c3374080cbf03d881d3cd6af40d src/utils/thread.h
Local modifications:
- s/WebP/VP9/g
- camelcase functions -> lower with _'s
Change-Id: Ib6932640ee34f8b4782c6fbd15864a59d5d4c5fe
Diffstat (limited to 'vp9/decoder/vp9_thread.h')
-rw-r--r-- | vp9/decoder/vp9_thread.h | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/vp9/decoder/vp9_thread.h b/vp9/decoder/vp9_thread.h new file mode 100644 index 000000000..a8f7e046a --- /dev/null +++ b/vp9/decoder/vp9_thread.h @@ -0,0 +1,93 @@ +// Copyright 2013 Google Inc. All Rights Reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. +// ----------------------------------------------------------------------------- +// +// Multi-threaded worker +// +// Original source: +// http://git.chromium.org/webm/libwebp.git +// 100644 blob 13a61a4c84194c3374080cbf03d881d3cd6af40d src/utils/thread.h + + +#ifndef VP9_DECODER_VP9_THREAD_H_ +#define VP9_DECODER_VP9_THREAD_H_ + +#include "vpx_config.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +#if CONFIG_MULTITHREAD + +#if defined(_WIN32) + +#include <windows.h> +typedef HANDLE pthread_t; +typedef CRITICAL_SECTION pthread_mutex_t; +typedef struct { + HANDLE waiting_sem_; + HANDLE received_sem_; + HANDLE signal_event_; +} pthread_cond_t; + +#else + +#include <pthread.h> + +#endif /* _WIN32 */ +#endif /* CONFIG_MULTITHREAD */ + +// State of the worker thread object +typedef enum { + NOT_OK = 0, // object is unusable + OK, // ready to work + WORK // busy finishing the current task +} VP9WorkerStatus; + +// Function to be called by the worker thread. Takes two opaque pointers as +// arguments (data1 and data2), and should return false in case of error. +typedef int (*VP9WorkerHook)(void*, void*); + +// Synchronize object used to launch job in the worker thread +typedef struct { +#if CONFIG_MULTITHREAD + pthread_mutex_t mutex_; + pthread_cond_t condition_; + pthread_t thread_; +#endif + VP9WorkerStatus status_; + VP9WorkerHook hook; // hook to call + void* data1; // first argument passed to 'hook' + void* data2; // second argument passed to 'hook' + int had_error; // return value of the last call to 'hook' +} VP9Worker; + +// Must be called first, before any other method. +void vp9_worker_init(VP9Worker* const worker); +// Must be called to initialize the object and spawn the thread. Re-entrant. +// Will potentially launch the thread. Returns false in case of error. +int vp9_worker_reset(VP9Worker* const worker); +// Makes sure the previous work is finished. Returns true if worker->had_error +// was not set and no error condition was triggered by the working thread. +int vp9_worker_sync(VP9Worker* const worker); +// Triggers the thread to call hook() with data1 and data2 argument. These +// hook/data1/data2 can be changed at any time before calling this function, +// but not be changed afterward until the next call to vp9_worker_sync(). +void vp9_worker_launch(VP9Worker* const worker); +// Kill the thread and terminate the object. To use the object again, one +// must call vp9_worker_reset() again. +void vp9_worker_end(VP9Worker* const worker); + +//------------------------------------------------------------------------------ + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif + +#endif /* VP9_DECODER_VP9_THREAD_H_ */ |