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1050 lines
32 KiB
1050 lines
32 KiB
/* |
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* Copyright (c) 2004 Roman Shaposhnik |
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* Copyright (c) 2008 Alexander Strange (astrange@ithinksw.com) |
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* |
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* Many thanks to Steven M. Schultz for providing clever ideas and |
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* to Michael Niedermayer <michaelni@gmx.at> for writing initial |
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* implementation. |
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* |
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* This file is part of Libav. |
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* |
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* Libav is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* Libav is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with Libav; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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|
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/** |
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* @file |
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* Multithreading support functions |
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* @see doc/multithreading.txt |
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*/ |
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|
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#include "config.h" |
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|
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#if HAVE_SCHED_GETAFFINITY |
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#define _GNU_SOURCE |
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#include <sched.h> |
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#endif |
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#if HAVE_GETPROCESSAFFINITYMASK |
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#include <windows.h> |
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#endif |
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#if HAVE_SYSCTL |
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#if HAVE_SYS_PARAM_H |
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#include <sys/param.h> |
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#endif |
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#include <sys/types.h> |
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#include <sys/sysctl.h> |
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#endif |
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#if HAVE_SYSCONF |
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#include <unistd.h> |
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#endif |
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|
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#include "avcodec.h" |
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#include "internal.h" |
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#include "thread.h" |
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|
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#if HAVE_PTHREADS |
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#include <pthread.h> |
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#elif HAVE_W32THREADS |
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#include "w32pthreads.h" |
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#endif |
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typedef int (action_func)(AVCodecContext *c, void *arg); |
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typedef int (action_func2)(AVCodecContext *c, void *arg, int jobnr, int threadnr); |
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typedef struct ThreadContext { |
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pthread_t *workers; |
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action_func *func; |
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action_func2 *func2; |
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void *args; |
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int *rets; |
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int rets_count; |
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int job_count; |
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int job_size; |
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|
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pthread_cond_t last_job_cond; |
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pthread_cond_t current_job_cond; |
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pthread_mutex_t current_job_lock; |
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int current_job; |
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int done; |
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} ThreadContext; |
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|
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/// Max number of frame buffers that can be allocated when using frame threads. |
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#define MAX_BUFFERS (32+1) |
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|
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/** |
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* Context used by codec threads and stored in their AVCodecContext thread_opaque. |
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*/ |
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typedef struct PerThreadContext { |
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struct FrameThreadContext *parent; |
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pthread_t thread; |
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int thread_init; |
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pthread_cond_t input_cond; ///< Used to wait for a new packet from the main thread. |
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pthread_cond_t progress_cond; ///< Used by child threads to wait for progress to change. |
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pthread_cond_t output_cond; ///< Used by the main thread to wait for frames to finish. |
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|
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pthread_mutex_t mutex; ///< Mutex used to protect the contents of the PerThreadContext. |
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pthread_mutex_t progress_mutex; ///< Mutex used to protect frame progress values and progress_cond. |
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AVCodecContext *avctx; ///< Context used to decode packets passed to this thread. |
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AVPacket avpkt; ///< Input packet (for decoding) or output (for encoding). |
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int allocated_buf_size; ///< Size allocated for avpkt.data |
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AVFrame frame; ///< Output frame (for decoding) or input (for encoding). |
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int got_frame; ///< The output of got_picture_ptr from the last avcodec_decode_video() call. |
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int result; ///< The result of the last codec decode/encode() call. |
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enum { |
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STATE_INPUT_READY, ///< Set when the thread is awaiting a packet. |
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STATE_SETTING_UP, ///< Set before the codec has called ff_thread_finish_setup(). |
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STATE_GET_BUFFER, /**< |
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* Set when the codec calls get_buffer(). |
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* State is returned to STATE_SETTING_UP afterwards. |
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*/ |
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STATE_SETUP_FINISHED ///< Set after the codec has called ff_thread_finish_setup(). |
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} state; |
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|
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/** |
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* Array of frames passed to ff_thread_release_buffer(). |
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* Frames are released after all threads referencing them are finished. |
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*/ |
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AVFrame released_buffers[MAX_BUFFERS]; |
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int num_released_buffers; |
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|
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/** |
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* Array of progress values used by ff_thread_get_buffer(). |
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*/ |
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int progress[MAX_BUFFERS][2]; |
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uint8_t progress_used[MAX_BUFFERS]; |
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|
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AVFrame *requested_frame; ///< AVFrame the codec passed to get_buffer() |
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} PerThreadContext; |
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/** |
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* Context stored in the client AVCodecContext thread_opaque. |
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*/ |
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typedef struct FrameThreadContext { |
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PerThreadContext *threads; ///< The contexts for each thread. |
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PerThreadContext *prev_thread; ///< The last thread submit_packet() was called on. |
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pthread_mutex_t buffer_mutex; ///< Mutex used to protect get/release_buffer(). |
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int next_decoding; ///< The next context to submit a packet to. |
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int next_finished; ///< The next context to return output from. |
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int delaying; /**< |
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* Set for the first N packets, where N is the number of threads. |
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* While it is set, ff_thread_en/decode_frame won't return any results. |
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*/ |
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int die; ///< Set when threads should exit. |
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} FrameThreadContext; |
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/* H264 slice threading seems to be buggy with more than 16 threads, |
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* limit the number of threads to 16 for automatic detection */ |
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#define MAX_AUTO_THREADS 16 |
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static int get_logical_cpus(AVCodecContext *avctx) |
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{ |
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int ret, nb_cpus = 1; |
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#if HAVE_SCHED_GETAFFINITY && defined(CPU_COUNT) |
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cpu_set_t cpuset; |
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CPU_ZERO(&cpuset); |
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ret = sched_getaffinity(0, sizeof(cpuset), &cpuset); |
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if (!ret) { |
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nb_cpus = CPU_COUNT(&cpuset); |
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} |
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#elif HAVE_GETPROCESSAFFINITYMASK |
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DWORD_PTR proc_aff, sys_aff; |
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ret = GetProcessAffinityMask(GetCurrentProcess(), &proc_aff, &sys_aff); |
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if (ret) |
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nb_cpus = av_popcount64(proc_aff); |
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#elif HAVE_SYSCTL && defined(HW_NCPU) |
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int mib[2] = { CTL_HW, HW_NCPU }; |
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size_t len = sizeof(nb_cpus); |
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ret = sysctl(mib, 2, &nb_cpus, &len, NULL, 0); |
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if (ret == -1) |
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nb_cpus = 0; |
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#elif HAVE_SYSCONF && defined(_SC_NPROC_ONLN) |
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nb_cpus = sysconf(_SC_NPROC_ONLN); |
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#elif HAVE_SYSCONF && defined(_SC_NPROCESSORS_ONLN) |
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nb_cpus = sysconf(_SC_NPROCESSORS_ONLN); |
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#endif |
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av_log(avctx, AV_LOG_DEBUG, "detected %d logical cores\n", nb_cpus); |
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return nb_cpus; |
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} |
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static void* attribute_align_arg worker(void *v) |
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{ |
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AVCodecContext *avctx = v; |
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ThreadContext *c = avctx->thread_opaque; |
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int our_job = c->job_count; |
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int thread_count = avctx->thread_count; |
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int self_id; |
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pthread_mutex_lock(&c->current_job_lock); |
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self_id = c->current_job++; |
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for (;;){ |
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while (our_job >= c->job_count) { |
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if (c->current_job == thread_count + c->job_count) |
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pthread_cond_signal(&c->last_job_cond); |
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pthread_cond_wait(&c->current_job_cond, &c->current_job_lock); |
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our_job = self_id; |
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if (c->done) { |
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pthread_mutex_unlock(&c->current_job_lock); |
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return NULL; |
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} |
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} |
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pthread_mutex_unlock(&c->current_job_lock); |
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c->rets[our_job%c->rets_count] = c->func ? c->func(avctx, (char*)c->args + our_job*c->job_size): |
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c->func2(avctx, c->args, our_job, self_id); |
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pthread_mutex_lock(&c->current_job_lock); |
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our_job = c->current_job++; |
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} |
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} |
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static av_always_inline void avcodec_thread_park_workers(ThreadContext *c, int thread_count) |
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{ |
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pthread_cond_wait(&c->last_job_cond, &c->current_job_lock); |
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pthread_mutex_unlock(&c->current_job_lock); |
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} |
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static void thread_free(AVCodecContext *avctx) |
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{ |
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ThreadContext *c = avctx->thread_opaque; |
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int i; |
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pthread_mutex_lock(&c->current_job_lock); |
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c->done = 1; |
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pthread_cond_broadcast(&c->current_job_cond); |
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pthread_mutex_unlock(&c->current_job_lock); |
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for (i=0; i<avctx->thread_count; i++) |
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pthread_join(c->workers[i], NULL); |
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pthread_mutex_destroy(&c->current_job_lock); |
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pthread_cond_destroy(&c->current_job_cond); |
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pthread_cond_destroy(&c->last_job_cond); |
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av_free(c->workers); |
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av_freep(&avctx->thread_opaque); |
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} |
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static int avcodec_thread_execute(AVCodecContext *avctx, action_func* func, void *arg, int *ret, int job_count, int job_size) |
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{ |
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ThreadContext *c= avctx->thread_opaque; |
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int dummy_ret; |
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if (!(avctx->active_thread_type&FF_THREAD_SLICE) || avctx->thread_count <= 1) |
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return avcodec_default_execute(avctx, func, arg, ret, job_count, job_size); |
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if (job_count <= 0) |
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return 0; |
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pthread_mutex_lock(&c->current_job_lock); |
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c->current_job = avctx->thread_count; |
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c->job_count = job_count; |
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c->job_size = job_size; |
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c->args = arg; |
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c->func = func; |
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if (ret) { |
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c->rets = ret; |
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c->rets_count = job_count; |
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} else { |
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c->rets = &dummy_ret; |
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c->rets_count = 1; |
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} |
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pthread_cond_broadcast(&c->current_job_cond); |
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avcodec_thread_park_workers(c, avctx->thread_count); |
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return 0; |
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} |
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static int avcodec_thread_execute2(AVCodecContext *avctx, action_func2* func2, void *arg, int *ret, int job_count) |
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{ |
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ThreadContext *c= avctx->thread_opaque; |
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c->func2 = func2; |
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return avcodec_thread_execute(avctx, NULL, arg, ret, job_count, 0); |
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} |
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static int thread_init(AVCodecContext *avctx) |
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{ |
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int i; |
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ThreadContext *c; |
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int thread_count = avctx->thread_count; |
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if (!thread_count) { |
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int nb_cpus = get_logical_cpus(avctx); |
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// use number of cores + 1 as thread count if there is more than one |
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if (nb_cpus > 1) |
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thread_count = avctx->thread_count = FFMIN(nb_cpus + 1, MAX_AUTO_THREADS); |
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else |
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thread_count = avctx->thread_count = 1; |
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} |
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if (thread_count <= 1) { |
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avctx->active_thread_type = 0; |
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return 0; |
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} |
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c = av_mallocz(sizeof(ThreadContext)); |
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if (!c) |
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return -1; |
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c->workers = av_mallocz(sizeof(pthread_t)*thread_count); |
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if (!c->workers) { |
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av_free(c); |
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return -1; |
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} |
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avctx->thread_opaque = c; |
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c->current_job = 0; |
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c->job_count = 0; |
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c->job_size = 0; |
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c->done = 0; |
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pthread_cond_init(&c->current_job_cond, NULL); |
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pthread_cond_init(&c->last_job_cond, NULL); |
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pthread_mutex_init(&c->current_job_lock, NULL); |
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pthread_mutex_lock(&c->current_job_lock); |
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for (i=0; i<thread_count; i++) { |
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if(pthread_create(&c->workers[i], NULL, worker, avctx)) { |
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avctx->thread_count = i; |
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pthread_mutex_unlock(&c->current_job_lock); |
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ff_thread_free(avctx); |
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return -1; |
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} |
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} |
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avcodec_thread_park_workers(c, thread_count); |
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avctx->execute = avcodec_thread_execute; |
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avctx->execute2 = avcodec_thread_execute2; |
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return 0; |
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} |
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/** |
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* Codec worker thread. |
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* |
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* Automatically calls ff_thread_finish_setup() if the codec does |
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* not provide an update_thread_context method, or if the codec returns |
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* before calling it. |
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*/ |
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static attribute_align_arg void *frame_worker_thread(void *arg) |
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{ |
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PerThreadContext *p = arg; |
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FrameThreadContext *fctx = p->parent; |
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AVCodecContext *avctx = p->avctx; |
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AVCodec *codec = avctx->codec; |
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while (1) { |
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if (p->state == STATE_INPUT_READY && !fctx->die) { |
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pthread_mutex_lock(&p->mutex); |
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while (p->state == STATE_INPUT_READY && !fctx->die) |
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pthread_cond_wait(&p->input_cond, &p->mutex); |
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pthread_mutex_unlock(&p->mutex); |
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} |
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if (fctx->die) break; |
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if (!codec->update_thread_context && avctx->thread_safe_callbacks) |
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ff_thread_finish_setup(avctx); |
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pthread_mutex_lock(&p->mutex); |
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avcodec_get_frame_defaults(&p->frame); |
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p->got_frame = 0; |
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p->result = codec->decode(avctx, &p->frame, &p->got_frame, &p->avpkt); |
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if (p->state == STATE_SETTING_UP) ff_thread_finish_setup(avctx); |
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p->state = STATE_INPUT_READY; |
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pthread_mutex_lock(&p->progress_mutex); |
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pthread_cond_signal(&p->output_cond); |
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pthread_mutex_unlock(&p->progress_mutex); |
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pthread_mutex_unlock(&p->mutex); |
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} |
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return NULL; |
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} |
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/** |
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* Update the next thread's AVCodecContext with values from the reference thread's context. |
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* |
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* @param dst The destination context. |
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* @param src The source context. |
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* @param for_user 0 if the destination is a codec thread, 1 if the destination is the user's thread |
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*/ |
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static int update_context_from_thread(AVCodecContext *dst, AVCodecContext *src, int for_user) |
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{ |
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int err = 0; |
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if (dst != src) { |
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dst->time_base = src->time_base; |
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dst->width = src->width; |
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dst->height = src->height; |
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dst->pix_fmt = src->pix_fmt; |
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dst->coded_width = src->coded_width; |
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dst->coded_height = src->coded_height; |
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dst->has_b_frames = src->has_b_frames; |
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dst->idct_algo = src->idct_algo; |
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dst->bits_per_coded_sample = src->bits_per_coded_sample; |
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dst->sample_aspect_ratio = src->sample_aspect_ratio; |
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dst->dtg_active_format = src->dtg_active_format; |
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dst->profile = src->profile; |
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dst->level = src->level; |
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dst->bits_per_raw_sample = src->bits_per_raw_sample; |
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dst->ticks_per_frame = src->ticks_per_frame; |
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dst->color_primaries = src->color_primaries; |
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dst->color_trc = src->color_trc; |
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dst->colorspace = src->colorspace; |
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dst->color_range = src->color_range; |
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dst->chroma_sample_location = src->chroma_sample_location; |
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} |
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if (for_user) { |
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dst->coded_frame = src->coded_frame; |
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} else { |
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if (dst->codec->update_thread_context) |
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err = dst->codec->update_thread_context(dst, src); |
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} |
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return err; |
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} |
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/** |
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* Update the next thread's AVCodecContext with values set by the user. |
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* |
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* @param dst The destination context. |
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* @param src The source context. |
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* @return 0 on success, negative error code on failure |
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*/ |
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static int update_context_from_user(AVCodecContext *dst, AVCodecContext *src) |
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{ |
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#define copy_fields(s, e) memcpy(&dst->s, &src->s, (char*)&dst->e - (char*)&dst->s); |
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dst->flags = src->flags; |
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|
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dst->draw_horiz_band= src->draw_horiz_band; |
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dst->get_buffer = src->get_buffer; |
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dst->release_buffer = src->release_buffer; |
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dst->opaque = src->opaque; |
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dst->dsp_mask = src->dsp_mask; |
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dst->debug = src->debug; |
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dst->debug_mv = src->debug_mv; |
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|
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dst->slice_flags = src->slice_flags; |
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dst->flags2 = src->flags2; |
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copy_fields(skip_loop_filter, subtitle_header); |
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dst->frame_number = src->frame_number; |
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dst->reordered_opaque = src->reordered_opaque; |
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|
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if (src->slice_count && src->slice_offset) { |
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if (dst->slice_count < src->slice_count) { |
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int *tmp = av_realloc(dst->slice_offset, src->slice_count * |
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sizeof(*dst->slice_offset)); |
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if (!tmp) { |
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av_free(dst->slice_offset); |
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return AVERROR(ENOMEM); |
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} |
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dst->slice_offset = tmp; |
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} |
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memcpy(dst->slice_offset, src->slice_offset, |
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src->slice_count * sizeof(*dst->slice_offset)); |
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} |
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dst->slice_count = src->slice_count; |
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return 0; |
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#undef copy_fields |
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} |
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|
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static void free_progress(AVFrame *f) |
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{ |
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PerThreadContext *p = f->owner->thread_opaque; |
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int *progress = f->thread_opaque; |
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|
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p->progress_used[(progress - p->progress[0]) / 2] = 0; |
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} |
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|
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/// Releases the buffers that this decoding thread was the last user of. |
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static void release_delayed_buffers(PerThreadContext *p) |
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{ |
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FrameThreadContext *fctx = p->parent; |
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|
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while (p->num_released_buffers > 0) { |
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AVFrame *f; |
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|
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pthread_mutex_lock(&fctx->buffer_mutex); |
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f = &p->released_buffers[--p->num_released_buffers]; |
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free_progress(f); |
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f->thread_opaque = NULL; |
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|
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f->owner->release_buffer(f->owner, f); |
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pthread_mutex_unlock(&fctx->buffer_mutex); |
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} |
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} |
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|
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static int submit_packet(PerThreadContext *p, AVPacket *avpkt) |
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{ |
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FrameThreadContext *fctx = p->parent; |
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PerThreadContext *prev_thread = fctx->prev_thread; |
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AVCodec *codec = p->avctx->codec; |
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uint8_t *buf = p->avpkt.data; |
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|
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if (!avpkt->size && !(codec->capabilities & CODEC_CAP_DELAY)) return 0; |
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|
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pthread_mutex_lock(&p->mutex); |
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|
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release_delayed_buffers(p); |
|
|
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if (prev_thread) { |
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int err; |
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if (prev_thread->state == STATE_SETTING_UP) { |
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pthread_mutex_lock(&prev_thread->progress_mutex); |
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while (prev_thread->state == STATE_SETTING_UP) |
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pthread_cond_wait(&prev_thread->progress_cond, &prev_thread->progress_mutex); |
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pthread_mutex_unlock(&prev_thread->progress_mutex); |
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} |
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|
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err = update_context_from_thread(p->avctx, prev_thread->avctx, 0); |
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if (err) { |
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pthread_mutex_unlock(&p->mutex); |
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return err; |
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} |
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} |
|
|
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av_fast_malloc(&buf, &p->allocated_buf_size, avpkt->size + FF_INPUT_BUFFER_PADDING_SIZE); |
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p->avpkt = *avpkt; |
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p->avpkt.data = buf; |
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memcpy(buf, avpkt->data, avpkt->size); |
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memset(buf + avpkt->size, 0, FF_INPUT_BUFFER_PADDING_SIZE); |
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|
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p->state = STATE_SETTING_UP; |
|
pthread_cond_signal(&p->input_cond); |
|
pthread_mutex_unlock(&p->mutex); |
|
|
|
/* |
|
* If the client doesn't have a thread-safe get_buffer(), |
|
* then decoding threads call back to the main thread, |
|
* and it calls back to the client here. |
|
*/ |
|
|
|
if (!p->avctx->thread_safe_callbacks && |
|
p->avctx->get_buffer != avcodec_default_get_buffer) { |
|
while (p->state != STATE_SETUP_FINISHED && p->state != STATE_INPUT_READY) { |
|
pthread_mutex_lock(&p->progress_mutex); |
|
while (p->state == STATE_SETTING_UP) |
|
pthread_cond_wait(&p->progress_cond, &p->progress_mutex); |
|
|
|
if (p->state == STATE_GET_BUFFER) { |
|
p->result = p->avctx->get_buffer(p->avctx, p->requested_frame); |
|
p->state = STATE_SETTING_UP; |
|
pthread_cond_signal(&p->progress_cond); |
|
} |
|
pthread_mutex_unlock(&p->progress_mutex); |
|
} |
|
} |
|
|
|
fctx->prev_thread = p; |
|
fctx->next_decoding++; |
|
|
|
return 0; |
|
} |
|
|
|
int ff_thread_decode_frame(AVCodecContext *avctx, |
|
AVFrame *picture, int *got_picture_ptr, |
|
AVPacket *avpkt) |
|
{ |
|
FrameThreadContext *fctx = avctx->thread_opaque; |
|
int finished = fctx->next_finished; |
|
PerThreadContext *p; |
|
int err; |
|
|
|
/* |
|
* Submit a packet to the next decoding thread. |
|
*/ |
|
|
|
p = &fctx->threads[fctx->next_decoding]; |
|
err = update_context_from_user(p->avctx, avctx); |
|
if (err) return err; |
|
err = submit_packet(p, avpkt); |
|
if (err) return err; |
|
|
|
/* |
|
* If we're still receiving the initial packets, don't return a frame. |
|
*/ |
|
|
|
if (fctx->delaying) { |
|
if (fctx->next_decoding >= (avctx->thread_count-1)) fctx->delaying = 0; |
|
|
|
*got_picture_ptr=0; |
|
if (avpkt->size) |
|
return avpkt->size; |
|
} |
|
|
|
/* |
|
* Return the next available frame from the oldest thread. |
|
* If we're at the end of the stream, then we have to skip threads that |
|
* didn't output a frame, because we don't want to accidentally signal |
|
* EOF (avpkt->size == 0 && *got_picture_ptr == 0). |
|
*/ |
|
|
|
do { |
|
p = &fctx->threads[finished++]; |
|
|
|
if (p->state != STATE_INPUT_READY) { |
|
pthread_mutex_lock(&p->progress_mutex); |
|
while (p->state != STATE_INPUT_READY) |
|
pthread_cond_wait(&p->output_cond, &p->progress_mutex); |
|
pthread_mutex_unlock(&p->progress_mutex); |
|
} |
|
|
|
*picture = p->frame; |
|
*got_picture_ptr = p->got_frame; |
|
picture->pkt_dts = p->avpkt.dts; |
|
|
|
/* |
|
* A later call with avkpt->size == 0 may loop over all threads, |
|
* including this one, searching for a frame to return before being |
|
* stopped by the "finished != fctx->next_finished" condition. |
|
* Make sure we don't mistakenly return the same frame again. |
|
*/ |
|
p->got_frame = 0; |
|
|
|
if (finished >= avctx->thread_count) finished = 0; |
|
} while (!avpkt->size && !*got_picture_ptr && finished != fctx->next_finished); |
|
|
|
update_context_from_thread(avctx, p->avctx, 1); |
|
|
|
if (fctx->next_decoding >= avctx->thread_count) fctx->next_decoding = 0; |
|
|
|
fctx->next_finished = finished; |
|
|
|
/* return the size of the consumed packet if no error occurred */ |
|
return (p->result >= 0) ? avpkt->size : p->result; |
|
} |
|
|
|
void ff_thread_report_progress(AVFrame *f, int n, int field) |
|
{ |
|
PerThreadContext *p; |
|
int *progress = f->thread_opaque; |
|
|
|
if (!progress || progress[field] >= n) return; |
|
|
|
p = f->owner->thread_opaque; |
|
|
|
if (f->owner->debug&FF_DEBUG_THREADS) |
|
av_log(f->owner, AV_LOG_DEBUG, "%p finished %d field %d\n", progress, n, field); |
|
|
|
pthread_mutex_lock(&p->progress_mutex); |
|
progress[field] = n; |
|
pthread_cond_broadcast(&p->progress_cond); |
|
pthread_mutex_unlock(&p->progress_mutex); |
|
} |
|
|
|
void ff_thread_await_progress(AVFrame *f, int n, int field) |
|
{ |
|
PerThreadContext *p; |
|
int *progress = f->thread_opaque; |
|
|
|
if (!progress || progress[field] >= n) return; |
|
|
|
p = f->owner->thread_opaque; |
|
|
|
if (f->owner->debug&FF_DEBUG_THREADS) |
|
av_log(f->owner, AV_LOG_DEBUG, "thread awaiting %d field %d from %p\n", n, field, progress); |
|
|
|
pthread_mutex_lock(&p->progress_mutex); |
|
while (progress[field] < n) |
|
pthread_cond_wait(&p->progress_cond, &p->progress_mutex); |
|
pthread_mutex_unlock(&p->progress_mutex); |
|
} |
|
|
|
void ff_thread_finish_setup(AVCodecContext *avctx) { |
|
PerThreadContext *p = avctx->thread_opaque; |
|
|
|
if (!(avctx->active_thread_type&FF_THREAD_FRAME)) return; |
|
|
|
pthread_mutex_lock(&p->progress_mutex); |
|
p->state = STATE_SETUP_FINISHED; |
|
pthread_cond_broadcast(&p->progress_cond); |
|
pthread_mutex_unlock(&p->progress_mutex); |
|
} |
|
|
|
/// Waits for all threads to finish. |
|
static void park_frame_worker_threads(FrameThreadContext *fctx, int thread_count) |
|
{ |
|
int i; |
|
|
|
for (i = 0; i < thread_count; i++) { |
|
PerThreadContext *p = &fctx->threads[i]; |
|
|
|
if (p->state != STATE_INPUT_READY) { |
|
pthread_mutex_lock(&p->progress_mutex); |
|
while (p->state != STATE_INPUT_READY) |
|
pthread_cond_wait(&p->output_cond, &p->progress_mutex); |
|
pthread_mutex_unlock(&p->progress_mutex); |
|
} |
|
} |
|
} |
|
|
|
static void frame_thread_free(AVCodecContext *avctx, int thread_count) |
|
{ |
|
FrameThreadContext *fctx = avctx->thread_opaque; |
|
AVCodec *codec = avctx->codec; |
|
int i; |
|
|
|
park_frame_worker_threads(fctx, thread_count); |
|
|
|
if (fctx->prev_thread && fctx->prev_thread != fctx->threads) |
|
update_context_from_thread(fctx->threads->avctx, fctx->prev_thread->avctx, 0); |
|
|
|
fctx->die = 1; |
|
|
|
for (i = 0; i < thread_count; i++) { |
|
PerThreadContext *p = &fctx->threads[i]; |
|
|
|
pthread_mutex_lock(&p->mutex); |
|
pthread_cond_signal(&p->input_cond); |
|
pthread_mutex_unlock(&p->mutex); |
|
|
|
if (p->thread_init) |
|
pthread_join(p->thread, NULL); |
|
|
|
if (codec->close) |
|
codec->close(p->avctx); |
|
|
|
avctx->codec = NULL; |
|
|
|
release_delayed_buffers(p); |
|
} |
|
|
|
for (i = 0; i < thread_count; i++) { |
|
PerThreadContext *p = &fctx->threads[i]; |
|
|
|
avcodec_default_free_buffers(p->avctx); |
|
|
|
pthread_mutex_destroy(&p->mutex); |
|
pthread_mutex_destroy(&p->progress_mutex); |
|
pthread_cond_destroy(&p->input_cond); |
|
pthread_cond_destroy(&p->progress_cond); |
|
pthread_cond_destroy(&p->output_cond); |
|
av_freep(&p->avpkt.data); |
|
|
|
if (i) { |
|
av_freep(&p->avctx->priv_data); |
|
av_freep(&p->avctx->internal); |
|
av_freep(&p->avctx->slice_offset); |
|
} |
|
|
|
av_freep(&p->avctx); |
|
} |
|
|
|
av_freep(&fctx->threads); |
|
pthread_mutex_destroy(&fctx->buffer_mutex); |
|
av_freep(&avctx->thread_opaque); |
|
} |
|
|
|
static int frame_thread_init(AVCodecContext *avctx) |
|
{ |
|
int thread_count = avctx->thread_count; |
|
AVCodec *codec = avctx->codec; |
|
AVCodecContext *src = avctx; |
|
FrameThreadContext *fctx; |
|
int i, err = 0; |
|
|
|
if (!thread_count) { |
|
int nb_cpus = get_logical_cpus(avctx); |
|
// 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; |
|
} |
|
|
|
avctx->thread_opaque = fctx = av_mallocz(sizeof(FrameThreadContext)); |
|
|
|
fctx->threads = av_mallocz(sizeof(PerThreadContext) * thread_count); |
|
pthread_mutex_init(&fctx->buffer_mutex, NULL); |
|
fctx->delaying = 1; |
|
|
|
for (i = 0; i < thread_count; i++) { |
|
AVCodecContext *copy = av_malloc(sizeof(AVCodecContext)); |
|
PerThreadContext *p = &fctx->threads[i]; |
|
|
|
pthread_mutex_init(&p->mutex, NULL); |
|
pthread_mutex_init(&p->progress_mutex, NULL); |
|
pthread_cond_init(&p->input_cond, NULL); |
|
pthread_cond_init(&p->progress_cond, NULL); |
|
pthread_cond_init(&p->output_cond, NULL); |
|
|
|
p->parent = fctx; |
|
p->avctx = copy; |
|
|
|
if (!copy) { |
|
err = AVERROR(ENOMEM); |
|
goto error; |
|
} |
|
|
|
*copy = *src; |
|
copy->thread_opaque = p; |
|
copy->pkt = &p->avpkt; |
|
|
|
if (!i) { |
|
src = copy; |
|
|
|
if (codec->init) |
|
err = codec->init(copy); |
|
|
|
update_context_from_thread(avctx, copy, 1); |
|
} else { |
|
copy->priv_data = av_malloc(codec->priv_data_size); |
|
if (!copy->priv_data) { |
|
err = AVERROR(ENOMEM); |
|
goto error; |
|
} |
|
memcpy(copy->priv_data, src->priv_data, codec->priv_data_size); |
|
copy->internal = av_malloc(sizeof(AVCodecInternal)); |
|
if (!copy->internal) { |
|
err = AVERROR(ENOMEM); |
|
goto error; |
|
} |
|
*copy->internal = *src->internal; |
|
copy->internal->is_copy = 1; |
|
|
|
if (codec->init_thread_copy) |
|
err = codec->init_thread_copy(copy); |
|
} |
|
|
|
if (err) goto error; |
|
|
|
if (!pthread_create(&p->thread, NULL, frame_worker_thread, p)) |
|
p->thread_init = 1; |
|
} |
|
|
|
return 0; |
|
|
|
error: |
|
frame_thread_free(avctx, i+1); |
|
|
|
return err; |
|
} |
|
|
|
void ff_thread_flush(AVCodecContext *avctx) |
|
{ |
|
FrameThreadContext *fctx = avctx->thread_opaque; |
|
|
|
if (!avctx->thread_opaque) return; |
|
|
|
park_frame_worker_threads(fctx, avctx->thread_count); |
|
if (fctx->prev_thread) { |
|
if (fctx->prev_thread != &fctx->threads[0]) |
|
update_context_from_thread(fctx->threads[0].avctx, fctx->prev_thread->avctx, 0); |
|
if (avctx->codec->flush) |
|
avctx->codec->flush(fctx->threads[0].avctx); |
|
} |
|
|
|
fctx->next_decoding = fctx->next_finished = 0; |
|
fctx->delaying = 1; |
|
fctx->prev_thread = NULL; |
|
for (int i = 0; i < avctx->thread_count; i++) { |
|
PerThreadContext *p = &fctx->threads[i]; |
|
// Make sure decode flush calls with size=0 won't return old frames |
|
p->got_frame = 0; |
|
|
|
release_delayed_buffers(p); |
|
} |
|
} |
|
|
|
static int *allocate_progress(PerThreadContext *p) |
|
{ |
|
int i; |
|
|
|
for (i = 0; i < MAX_BUFFERS; i++) |
|
if (!p->progress_used[i]) break; |
|
|
|
if (i == MAX_BUFFERS) { |
|
av_log(p->avctx, AV_LOG_ERROR, "allocate_progress() overflow\n"); |
|
return NULL; |
|
} |
|
|
|
p->progress_used[i] = 1; |
|
|
|
return p->progress[i]; |
|
} |
|
|
|
int ff_thread_get_buffer(AVCodecContext *avctx, AVFrame *f) |
|
{ |
|
PerThreadContext *p = avctx->thread_opaque; |
|
int *progress, err; |
|
|
|
f->owner = avctx; |
|
|
|
if (!(avctx->active_thread_type&FF_THREAD_FRAME)) { |
|
f->thread_opaque = NULL; |
|
return avctx->get_buffer(avctx, f); |
|
} |
|
|
|
if (p->state != STATE_SETTING_UP && |
|
(avctx->codec->update_thread_context || !avctx->thread_safe_callbacks)) { |
|
av_log(avctx, AV_LOG_ERROR, "get_buffer() cannot be called after ff_thread_finish_setup()\n"); |
|
return -1; |
|
} |
|
|
|
pthread_mutex_lock(&p->parent->buffer_mutex); |
|
f->thread_opaque = progress = allocate_progress(p); |
|
|
|
if (!progress) { |
|
pthread_mutex_unlock(&p->parent->buffer_mutex); |
|
return -1; |
|
} |
|
|
|
progress[0] = |
|
progress[1] = -1; |
|
|
|
if (avctx->thread_safe_callbacks || |
|
avctx->get_buffer == avcodec_default_get_buffer) { |
|
err = avctx->get_buffer(avctx, f); |
|
} else { |
|
p->requested_frame = f; |
|
p->state = STATE_GET_BUFFER; |
|
pthread_mutex_lock(&p->progress_mutex); |
|
pthread_cond_signal(&p->progress_cond); |
|
|
|
while (p->state != STATE_SETTING_UP) |
|
pthread_cond_wait(&p->progress_cond, &p->progress_mutex); |
|
|
|
err = p->result; |
|
|
|
pthread_mutex_unlock(&p->progress_mutex); |
|
|
|
if (!avctx->codec->update_thread_context) |
|
ff_thread_finish_setup(avctx); |
|
} |
|
|
|
if (err) { |
|
free_progress(f); |
|
f->thread_opaque = NULL; |
|
} |
|
pthread_mutex_unlock(&p->parent->buffer_mutex); |
|
|
|
return err; |
|
} |
|
|
|
void ff_thread_release_buffer(AVCodecContext *avctx, AVFrame *f) |
|
{ |
|
PerThreadContext *p = avctx->thread_opaque; |
|
FrameThreadContext *fctx; |
|
|
|
if (!(avctx->active_thread_type&FF_THREAD_FRAME)) { |
|
avctx->release_buffer(avctx, f); |
|
return; |
|
} |
|
|
|
if (p->num_released_buffers >= MAX_BUFFERS) { |
|
av_log(p->avctx, AV_LOG_ERROR, "too many thread_release_buffer calls!\n"); |
|
return; |
|
} |
|
|
|
if(avctx->debug & FF_DEBUG_BUFFERS) |
|
av_log(avctx, AV_LOG_DEBUG, "thread_release_buffer called on pic %p\n", f); |
|
|
|
fctx = p->parent; |
|
pthread_mutex_lock(&fctx->buffer_mutex); |
|
p->released_buffers[p->num_released_buffers++] = *f; |
|
pthread_mutex_unlock(&fctx->buffer_mutex); |
|
memset(f->data, 0, sizeof(f->data)); |
|
} |
|
|
|
/** |
|
* Set the threading algorithms used. |
|
* |
|
* Threading requires more than one thread. |
|
* Frame threading requires entire frames to be passed to the codec, |
|
* and introduces extra decoding delay, so is incompatible with low_delay. |
|
* |
|
* @param avctx The context. |
|
*/ |
|
static void validate_thread_parameters(AVCodecContext *avctx) |
|
{ |
|
int frame_threading_supported = (avctx->codec->capabilities & CODEC_CAP_FRAME_THREADS) |
|
&& !(avctx->flags & CODEC_FLAG_TRUNCATED) |
|
&& !(avctx->flags & CODEC_FLAG_LOW_DELAY) |
|
&& !(avctx->flags2 & CODEC_FLAG2_CHUNKS); |
|
if (avctx->thread_count == 1) { |
|
avctx->active_thread_type = 0; |
|
} else if (frame_threading_supported && (avctx->thread_type & FF_THREAD_FRAME)) { |
|
avctx->active_thread_type = FF_THREAD_FRAME; |
|
} else if (avctx->codec->capabilities & CODEC_CAP_SLICE_THREADS && |
|
avctx->thread_type & FF_THREAD_SLICE) { |
|
avctx->active_thread_type = FF_THREAD_SLICE; |
|
} else if (!(avctx->codec->capabilities & CODEC_CAP_AUTO_THREADS)) { |
|
avctx->thread_count = 1; |
|
avctx->active_thread_type = 0; |
|
} |
|
} |
|
|
|
int ff_thread_init(AVCodecContext *avctx) |
|
{ |
|
if (avctx->thread_opaque) { |
|
av_log(avctx, AV_LOG_ERROR, "avcodec_thread_init is ignored after avcodec_open\n"); |
|
return -1; |
|
} |
|
|
|
#if HAVE_W32THREADS |
|
w32thread_init(); |
|
#endif |
|
|
|
if (avctx->codec) { |
|
validate_thread_parameters(avctx); |
|
|
|
if (avctx->active_thread_type&FF_THREAD_SLICE) |
|
return thread_init(avctx); |
|
else if (avctx->active_thread_type&FF_THREAD_FRAME) |
|
return frame_thread_init(avctx); |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
void ff_thread_free(AVCodecContext *avctx) |
|
{ |
|
if (avctx->active_thread_type&FF_THREAD_FRAME) |
|
frame_thread_free(avctx, avctx->thread_count); |
|
else |
|
thread_free(avctx); |
|
}
|
|
|