forked from KolibriOS/kolibrios
308 lines
8.9 KiB
C
308 lines
8.9 KiB
C
|
/*
|
||
|
* This file is part of FFmpeg.
|
||
|
*
|
||
|
* FFmpeg is free software; you can redistribute it and/or
|
||
|
* modify it under the terms of the GNU Lesser General Public
|
||
|
* License as published by the Free Software Foundation; either
|
||
|
* version 2.1 of the License, or (at your option) any later version.
|
||
|
*
|
||
|
* FFmpeg is distributed in the hope that it will be useful,
|
||
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||
|
* Lesser General Public License for more details.
|
||
|
*
|
||
|
* You should have received a copy of the GNU Lesser General Public
|
||
|
* License along with FFmpeg; if not, write to the Free Software
|
||
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
||
|
*/
|
||
|
|
||
|
/**
|
||
|
* @file
|
||
|
* Slice multithreading support functions
|
||
|
* @see doc/multithreading.txt
|
||
|
*/
|
||
|
|
||
|
#include "config.h"
|
||
|
|
||
|
#if HAVE_PTHREADS
|
||
|
#include <pthread.h>
|
||
|
#elif HAVE_W32THREADS
|
||
|
#include "compat/w32pthreads.h"
|
||
|
#elif HAVE_OS2THREADS
|
||
|
#include "compat/os2threads.h"
|
||
|
#endif
|
||
|
|
||
|
#include "avcodec.h"
|
||
|
#include "internal.h"
|
||
|
#include "pthread_internal.h"
|
||
|
#include "thread.h"
|
||
|
|
||
|
#include "libavutil/common.h"
|
||
|
#include "libavutil/cpu.h"
|
||
|
#include "libavutil/mem.h"
|
||
|
|
||
|
typedef int (action_func)(AVCodecContext *c, void *arg);
|
||
|
typedef int (action_func2)(AVCodecContext *c, void *arg, int jobnr, int threadnr);
|
||
|
|
||
|
typedef struct SliceThreadContext {
|
||
|
pthread_t *workers;
|
||
|
action_func *func;
|
||
|
action_func2 *func2;
|
||
|
void *args;
|
||
|
int *rets;
|
||
|
int rets_count;
|
||
|
int job_count;
|
||
|
int job_size;
|
||
|
|
||
|
pthread_cond_t last_job_cond;
|
||
|
pthread_cond_t current_job_cond;
|
||
|
pthread_mutex_t current_job_lock;
|
||
|
unsigned current_execute;
|
||
|
int current_job;
|
||
|
int done;
|
||
|
|
||
|
int *entries;
|
||
|
int entries_count;
|
||
|
int thread_count;
|
||
|
pthread_cond_t *progress_cond;
|
||
|
pthread_mutex_t *progress_mutex;
|
||
|
} SliceThreadContext;
|
||
|
|
||
|
static void* attribute_align_arg worker(void *v)
|
||
|
{
|
||
|
AVCodecContext *avctx = v;
|
||
|
SliceThreadContext *c = avctx->internal->thread_ctx;
|
||
|
unsigned last_execute = 0;
|
||
|
int our_job = c->job_count;
|
||
|
int thread_count = avctx->thread_count;
|
||
|
int self_id;
|
||
|
|
||
|
pthread_mutex_lock(&c->current_job_lock);
|
||
|
self_id = c->current_job++;
|
||
|
for (;;){
|
||
|
while (our_job >= c->job_count) {
|
||
|
if (c->current_job == thread_count + c->job_count)
|
||
|
pthread_cond_signal(&c->last_job_cond);
|
||
|
|
||
|
while (last_execute == c->current_execute && !c->done)
|
||
|
pthread_cond_wait(&c->current_job_cond, &c->current_job_lock);
|
||
|
last_execute = c->current_execute;
|
||
|
our_job = self_id;
|
||
|
|
||
|
if (c->done) {
|
||
|
pthread_mutex_unlock(&c->current_job_lock);
|
||
|
return NULL;
|
||
|
}
|
||
|
}
|
||
|
pthread_mutex_unlock(&c->current_job_lock);
|
||
|
|
||
|
c->rets[our_job%c->rets_count] = c->func ? c->func(avctx, (char*)c->args + our_job*c->job_size):
|
||
|
c->func2(avctx, c->args, our_job, self_id);
|
||
|
|
||
|
pthread_mutex_lock(&c->current_job_lock);
|
||
|
our_job = c->current_job++;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
void ff_slice_thread_free(AVCodecContext *avctx)
|
||
|
{
|
||
|
SliceThreadContext *c = avctx->internal->thread_ctx;
|
||
|
int i;
|
||
|
|
||
|
pthread_mutex_lock(&c->current_job_lock);
|
||
|
c->done = 1;
|
||
|
pthread_cond_broadcast(&c->current_job_cond);
|
||
|
for (i = 0; i < c->thread_count; i++)
|
||
|
pthread_cond_broadcast(&c->progress_cond[i]);
|
||
|
pthread_mutex_unlock(&c->current_job_lock);
|
||
|
|
||
|
for (i=0; i<avctx->thread_count; i++)
|
||
|
pthread_join(c->workers[i], NULL);
|
||
|
|
||
|
for (i = 0; i < c->thread_count; i++) {
|
||
|
pthread_mutex_destroy(&c->progress_mutex[i]);
|
||
|
pthread_cond_destroy(&c->progress_cond[i]);
|
||
|
}
|
||
|
|
||
|
pthread_mutex_destroy(&c->current_job_lock);
|
||
|
pthread_cond_destroy(&c->current_job_cond);
|
||
|
pthread_cond_destroy(&c->last_job_cond);
|
||
|
|
||
|
av_freep(&c->entries);
|
||
|
av_freep(&c->progress_mutex);
|
||
|
av_freep(&c->progress_cond);
|
||
|
|
||
|
av_freep(&c->workers);
|
||
|
av_freep(&avctx->internal->thread_ctx);
|
||
|
}
|
||
|
|
||
|
static av_always_inline void thread_park_workers(SliceThreadContext *c, int thread_count)
|
||
|
{
|
||
|
while (c->current_job != thread_count + c->job_count)
|
||
|
pthread_cond_wait(&c->last_job_cond, &c->current_job_lock);
|
||
|
pthread_mutex_unlock(&c->current_job_lock);
|
||
|
}
|
||
|
|
||
|
static int thread_execute(AVCodecContext *avctx, action_func* func, void *arg, int *ret, int job_count, int job_size)
|
||
|
{
|
||
|
SliceThreadContext *c = avctx->internal->thread_ctx;
|
||
|
int dummy_ret;
|
||
|
|
||
|
if (!(avctx->active_thread_type&FF_THREAD_SLICE) || avctx->thread_count <= 1)
|
||
|
return avcodec_default_execute(avctx, func, arg, ret, job_count, job_size);
|
||
|
|
||
|
if (job_count <= 0)
|
||
|
return 0;
|
||
|
|
||
|
pthread_mutex_lock(&c->current_job_lock);
|
||
|
|
||
|
c->current_job = avctx->thread_count;
|
||
|
c->job_count = job_count;
|
||
|
c->job_size = job_size;
|
||
|
c->args = arg;
|
||
|
c->func = func;
|
||
|
if (ret) {
|
||
|
c->rets = ret;
|
||
|
c->rets_count = job_count;
|
||
|
} else {
|
||
|
c->rets = &dummy_ret;
|
||
|
c->rets_count = 1;
|
||
|
}
|
||
|
c->current_execute++;
|
||
|
pthread_cond_broadcast(&c->current_job_cond);
|
||
|
|
||
|
thread_park_workers(c, avctx->thread_count);
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static int thread_execute2(AVCodecContext *avctx, action_func2* func2, void *arg, int *ret, int job_count)
|
||
|
{
|
||
|
SliceThreadContext *c = avctx->internal->thread_ctx;
|
||
|
c->func2 = func2;
|
||
|
return thread_execute(avctx, NULL, arg, ret, job_count, 0);
|
||
|
}
|
||
|
|
||
|
int ff_slice_thread_init(AVCodecContext *avctx)
|
||
|
{
|
||
|
int i;
|
||
|
SliceThreadContext *c;
|
||
|
int thread_count = avctx->thread_count;
|
||
|
|
||
|
#if HAVE_W32THREADS
|
||
|
w32thread_init();
|
||
|
#endif
|
||
|
|
||
|
if (!thread_count) {
|
||
|
int nb_cpus = av_cpu_count();
|
||
|
if (avctx->height)
|
||
|
nb_cpus = FFMIN(nb_cpus, (avctx->height+15)/16);
|
||
|
// use number of cores + 1 as thread count if there is more than one
|
||
|
if (nb_cpus > 1)
|
||
|
thread_count = avctx->thread_count = FFMIN(nb_cpus + 1, MAX_AUTO_THREADS);
|
||
|
else
|
||
|
thread_count = avctx->thread_count = 1;
|
||
|
}
|
||
|
|
||
|
if (thread_count <= 1) {
|
||
|
avctx->active_thread_type = 0;
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
c = av_mallocz(sizeof(SliceThreadContext));
|
||
|
if (!c)
|
||
|
return -1;
|
||
|
|
||
|
c->workers = av_mallocz_array(thread_count, sizeof(pthread_t));
|
||
|
if (!c->workers) {
|
||
|
av_free(c);
|
||
|
return -1;
|
||
|
}
|
||
|
|
||
|
avctx->internal->thread_ctx = c;
|
||
|
c->current_job = 0;
|
||
|
c->job_count = 0;
|
||
|
c->job_size = 0;
|
||
|
c->done = 0;
|
||
|
pthread_cond_init(&c->current_job_cond, NULL);
|
||
|
pthread_cond_init(&c->last_job_cond, NULL);
|
||
|
pthread_mutex_init(&c->current_job_lock, NULL);
|
||
|
pthread_mutex_lock(&c->current_job_lock);
|
||
|
for (i=0; i<thread_count; i++) {
|
||
|
if(pthread_create(&c->workers[i], NULL, worker, avctx)) {
|
||
|
avctx->thread_count = i;
|
||
|
pthread_mutex_unlock(&c->current_job_lock);
|
||
|
ff_thread_free(avctx);
|
||
|
return -1;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
thread_park_workers(c, thread_count);
|
||
|
|
||
|
avctx->execute = thread_execute;
|
||
|
avctx->execute2 = thread_execute2;
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
void ff_thread_report_progress2(AVCodecContext *avctx, int field, int thread, int n)
|
||
|
{
|
||
|
SliceThreadContext *p = avctx->internal->thread_ctx;
|
||
|
int *entries = p->entries;
|
||
|
|
||
|
pthread_mutex_lock(&p->progress_mutex[thread]);
|
||
|
entries[field] +=n;
|
||
|
pthread_cond_signal(&p->progress_cond[thread]);
|
||
|
pthread_mutex_unlock(&p->progress_mutex[thread]);
|
||
|
}
|
||
|
|
||
|
void ff_thread_await_progress2(AVCodecContext *avctx, int field, int thread, int shift)
|
||
|
{
|
||
|
SliceThreadContext *p = avctx->internal->thread_ctx;
|
||
|
int *entries = p->entries;
|
||
|
|
||
|
if (!entries || !field) return;
|
||
|
|
||
|
thread = thread ? thread - 1 : p->thread_count - 1;
|
||
|
|
||
|
pthread_mutex_lock(&p->progress_mutex[thread]);
|
||
|
while ((entries[field - 1] - entries[field]) < shift){
|
||
|
pthread_cond_wait(&p->progress_cond[thread], &p->progress_mutex[thread]);
|
||
|
}
|
||
|
pthread_mutex_unlock(&p->progress_mutex[thread]);
|
||
|
}
|
||
|
|
||
|
int ff_alloc_entries(AVCodecContext *avctx, int count)
|
||
|
{
|
||
|
int i;
|
||
|
|
||
|
if (avctx->active_thread_type & FF_THREAD_SLICE) {
|
||
|
SliceThreadContext *p = avctx->internal->thread_ctx;
|
||
|
p->thread_count = avctx->thread_count;
|
||
|
p->entries = av_mallocz_array(count, sizeof(int));
|
||
|
|
||
|
p->progress_mutex = av_malloc_array(p->thread_count, sizeof(pthread_mutex_t));
|
||
|
p->progress_cond = av_malloc_array(p->thread_count, sizeof(pthread_cond_t));
|
||
|
|
||
|
if (!p->entries || !p->progress_mutex || !p->progress_cond) {
|
||
|
av_freep(&p->entries);
|
||
|
av_freep(&p->progress_mutex);
|
||
|
av_freep(&p->progress_cond);
|
||
|
return AVERROR(ENOMEM);
|
||
|
}
|
||
|
p->entries_count = count;
|
||
|
|
||
|
for (i = 0; i < p->thread_count; i++) {
|
||
|
pthread_mutex_init(&p->progress_mutex[i], NULL);
|
||
|
pthread_cond_init(&p->progress_cond[i], NULL);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
void ff_reset_entries(AVCodecContext *avctx)
|
||
|
{
|
||
|
SliceThreadContext *p = avctx->internal->thread_ctx;
|
||
|
memset(p->entries, 0, p->entries_count * sizeof(int));
|
||
|
}
|