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![Jun Zhao](/assets/img/avatar_default.png)
use THREAD_SAFE_CALLBACKS() to simplifx more code Signed-off-by: Jun Zhao <mypopydev@gmail.com>
1014 lines
32 KiB
C
1014 lines
32 KiB
C
/*
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* This file is part of FFmpeg.
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*
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* FFmpeg 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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* FFmpeg 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 FFmpeg; 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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* @file
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* Frame multithreading support functions
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* @see doc/multithreading.txt
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*/
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#include "config.h"
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#include <stdatomic.h>
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#include <stdint.h>
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#include "avcodec.h"
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#include "hwaccel.h"
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#include "internal.h"
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#include "pthread_internal.h"
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#include "thread.h"
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#include "version.h"
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#include "libavutil/avassert.h"
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#include "libavutil/buffer.h"
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#include "libavutil/common.h"
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#include "libavutil/cpu.h"
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#include "libavutil/frame.h"
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#include "libavutil/internal.h"
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#include "libavutil/log.h"
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#include "libavutil/mem.h"
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#include "libavutil/opt.h"
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#include "libavutil/thread.h"
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enum {
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///< Set when the thread is awaiting a packet.
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STATE_INPUT_READY,
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///< Set before the codec has called ff_thread_finish_setup().
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STATE_SETTING_UP,
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/**
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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_GET_BUFFER,
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/**
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* Set when the codec calls get_format().
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* State is returned to STATE_SETTING_UP afterwards.
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*/
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STATE_GET_FORMAT,
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///< Set after the codec has called ff_thread_finish_setup().
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STATE_SETUP_FINISHED,
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};
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/**
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* Context used by codec threads and stored in their AVCodecInternal thread_ctx.
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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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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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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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atomic_int state;
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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;
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int num_released_buffers;
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int released_buffers_allocated;
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AVFrame *requested_frame; ///< AVFrame the codec passed to get_buffer()
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int requested_flags; ///< flags passed to get_buffer() for requested_frame
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const enum AVPixelFormat *available_formats; ///< Format array for get_format()
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enum AVPixelFormat result_format; ///< get_format() result
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int die; ///< Set when the thread should exit.
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int hwaccel_serializing;
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int async_serializing;
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atomic_int debug_threads; ///< Set if the FF_DEBUG_THREADS option is set.
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} PerThreadContext;
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/**
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* Context stored in the client AVCodecInternal thread_ctx.
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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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/**
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* This lock is used for ensuring threads run in serial when hwaccel
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* is used.
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*/
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pthread_mutex_t hwaccel_mutex;
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pthread_mutex_t async_mutex;
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pthread_cond_t async_cond;
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int async_lock;
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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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} FrameThreadContext;
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#define THREAD_SAFE_CALLBACKS(avctx) \
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((avctx)->thread_safe_callbacks || (avctx)->get_buffer2 == avcodec_default_get_buffer2)
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static void async_lock(FrameThreadContext *fctx)
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{
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pthread_mutex_lock(&fctx->async_mutex);
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while (fctx->async_lock)
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pthread_cond_wait(&fctx->async_cond, &fctx->async_mutex);
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fctx->async_lock = 1;
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pthread_mutex_unlock(&fctx->async_mutex);
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}
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static void async_unlock(FrameThreadContext *fctx)
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{
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pthread_mutex_lock(&fctx->async_mutex);
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av_assert0(fctx->async_lock);
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fctx->async_lock = 0;
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pthread_cond_broadcast(&fctx->async_cond);
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pthread_mutex_unlock(&fctx->async_mutex);
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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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AVCodecContext *avctx = p->avctx;
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const AVCodec *codec = avctx->codec;
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pthread_mutex_lock(&p->mutex);
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while (1) {
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while (atomic_load(&p->state) == STATE_INPUT_READY && !p->die)
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pthread_cond_wait(&p->input_cond, &p->mutex);
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if (p->die) break;
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if (!codec->update_thread_context && THREAD_SAFE_CALLBACKS(avctx))
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ff_thread_finish_setup(avctx);
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/* If a decoder supports hwaccel, then it must call ff_get_format().
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* Since that call must happen before ff_thread_finish_setup(), the
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* decoder is required to implement update_thread_context() and call
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* ff_thread_finish_setup() manually. Therefore the above
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* ff_thread_finish_setup() call did not happen and hwaccel_serializing
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* cannot be true here. */
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av_assert0(!p->hwaccel_serializing);
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/* if the previous thread uses hwaccel then we take the lock to ensure
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* the threads don't run concurrently */
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if (avctx->hwaccel) {
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pthread_mutex_lock(&p->parent->hwaccel_mutex);
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p->hwaccel_serializing = 1;
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}
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av_frame_unref(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->result < 0 || !p->got_frame) && p->frame->buf[0]) {
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if (avctx->internal->allocate_progress)
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av_log(avctx, AV_LOG_ERROR, "A frame threaded decoder did not "
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"free the frame on failure. This is a bug, please report it.\n");
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av_frame_unref(p->frame);
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}
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if (atomic_load(&p->state) == STATE_SETTING_UP)
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ff_thread_finish_setup(avctx);
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if (p->hwaccel_serializing) {
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p->hwaccel_serializing = 0;
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pthread_mutex_unlock(&p->parent->hwaccel_mutex);
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}
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if (p->async_serializing) {
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p->async_serializing = 0;
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async_unlock(p->parent);
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}
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pthread_mutex_lock(&p->progress_mutex);
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atomic_store(&p->state, STATE_INPUT_READY);
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pthread_cond_broadcast(&p->progress_cond);
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pthread_cond_signal(&p->output_cond);
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pthread_mutex_unlock(&p->progress_mutex);
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}
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pthread_mutex_unlock(&p->mutex);
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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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* @return 0 on success, negative error code on failure
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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 && (for_user || !(src->codec_descriptor->props & AV_CODEC_PROP_INTRA_ONLY))) {
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dst->time_base = src->time_base;
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dst->framerate = src->framerate;
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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->sw_pix_fmt = src->sw_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->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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dst->hwaccel = src->hwaccel;
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dst->hwaccel_context = src->hwaccel_context;
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dst->channels = src->channels;
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dst->sample_rate = src->sample_rate;
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dst->sample_fmt = src->sample_fmt;
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dst->channel_layout = src->channel_layout;
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dst->internal->hwaccel_priv_data = src->internal->hwaccel_priv_data;
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if (!!dst->hw_frames_ctx != !!src->hw_frames_ctx ||
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(dst->hw_frames_ctx && dst->hw_frames_ctx->data != src->hw_frames_ctx->data)) {
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av_buffer_unref(&dst->hw_frames_ctx);
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if (src->hw_frames_ctx) {
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dst->hw_frames_ctx = av_buffer_ref(src->hw_frames_ctx);
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if (!dst->hw_frames_ctx)
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return AVERROR(ENOMEM);
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}
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}
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dst->hwaccel_flags = src->hwaccel_flags;
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}
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if (for_user) {
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dst->delay = src->thread_count - 1;
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#if FF_API_CODED_FRAME
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FF_DISABLE_DEPRECATION_WARNINGS
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dst->coded_frame = src->coded_frame;
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FF_ENABLE_DEPRECATION_WARNINGS
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#endif
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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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dst->draw_horiz_band= src->draw_horiz_band;
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dst->get_buffer2 = src->get_buffer2;
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dst->opaque = src->opaque;
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dst->debug = src->debug;
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dst->debug_mv = src->debug_mv;
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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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dst->thread_safe_callbacks = src->thread_safe_callbacks;
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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 err = av_reallocp_array(&dst->slice_offset, src->slice_count,
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sizeof(*dst->slice_offset));
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if (err < 0)
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return err;
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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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/// 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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while (p->num_released_buffers > 0) {
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AVFrame *f;
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pthread_mutex_lock(&fctx->buffer_mutex);
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// fix extended data in case the caller screwed it up
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av_assert0(p->avctx->codec_type == AVMEDIA_TYPE_VIDEO ||
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p->avctx->codec_type == AVMEDIA_TYPE_AUDIO);
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f = &p->released_buffers[--p->num_released_buffers];
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f->extended_data = f->data;
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av_frame_unref(f);
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pthread_mutex_unlock(&fctx->buffer_mutex);
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}
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}
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static int submit_packet(PerThreadContext *p, AVCodecContext *user_avctx,
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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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const AVCodec *codec = p->avctx->codec;
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int ret;
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if (!avpkt->size && !(codec->capabilities & AV_CODEC_CAP_DELAY))
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return 0;
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pthread_mutex_lock(&p->mutex);
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ret = update_context_from_user(p->avctx, user_avctx);
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if (ret) {
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pthread_mutex_unlock(&p->mutex);
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return ret;
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}
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atomic_store_explicit(&p->debug_threads,
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(p->avctx->debug & FF_DEBUG_THREADS) != 0,
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memory_order_relaxed);
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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 (atomic_load(&prev_thread->state) == STATE_SETTING_UP) {
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pthread_mutex_lock(&prev_thread->progress_mutex);
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while (atomic_load(&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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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_packet_unref(&p->avpkt);
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ret = av_packet_ref(&p->avpkt, avpkt);
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if (ret < 0) {
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pthread_mutex_unlock(&p->mutex);
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av_log(p->avctx, AV_LOG_ERROR, "av_packet_ref() failed in submit_packet()\n");
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return ret;
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}
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atomic_store(&p->state, STATE_SETTING_UP);
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pthread_cond_signal(&p->input_cond);
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pthread_mutex_unlock(&p->mutex);
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/*
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* If the client doesn't have a thread-safe get_buffer(),
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* then decoding threads call back to the main thread,
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* and it calls back to the client here.
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*/
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if (!p->avctx->thread_safe_callbacks && (
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p->avctx->get_format != avcodec_default_get_format ||
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p->avctx->get_buffer2 != avcodec_default_get_buffer2)) {
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while (atomic_load(&p->state) != STATE_SETUP_FINISHED && atomic_load(&p->state) != STATE_INPUT_READY) {
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int call_done = 1;
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pthread_mutex_lock(&p->progress_mutex);
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while (atomic_load(&p->state) == STATE_SETTING_UP)
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pthread_cond_wait(&p->progress_cond, &p->progress_mutex);
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switch (atomic_load_explicit(&p->state, memory_order_acquire)) {
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case STATE_GET_BUFFER:
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p->result = ff_get_buffer(p->avctx, p->requested_frame, p->requested_flags);
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break;
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case STATE_GET_FORMAT:
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p->result_format = ff_get_format(p->avctx, p->available_formats);
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break;
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default:
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call_done = 0;
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break;
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}
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if (call_done) {
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atomic_store(&p->state, STATE_SETTING_UP);
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pthread_cond_signal(&p->progress_cond);
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}
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pthread_mutex_unlock(&p->progress_mutex);
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}
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}
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fctx->prev_thread = p;
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fctx->next_decoding++;
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return 0;
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}
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int ff_thread_decode_frame(AVCodecContext *avctx,
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AVFrame *picture, int *got_picture_ptr,
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AVPacket *avpkt)
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{
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FrameThreadContext *fctx = avctx->internal->thread_ctx;
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int finished = fctx->next_finished;
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PerThreadContext *p;
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int err;
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/* release the async lock, permitting blocked hwaccel threads to
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* go forward while we are in this function */
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async_unlock(fctx);
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/*
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* Submit a packet to the next decoding thread.
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*/
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|
|
p = &fctx->threads[fctx->next_decoding];
|
|
err = submit_packet(p, avctx, avpkt);
|
|
if (err)
|
|
goto finish;
|
|
|
|
/*
|
|
* If we're still receiving the initial packets, don't return a frame.
|
|
*/
|
|
|
|
if (fctx->next_decoding > (avctx->thread_count-1-(avctx->codec_id == AV_CODEC_ID_FFV1)))
|
|
fctx->delaying = 0;
|
|
|
|
if (fctx->delaying) {
|
|
*got_picture_ptr=0;
|
|
if (avpkt->size) {
|
|
err = avpkt->size;
|
|
goto finish;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* 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/error, because we don't want to accidentally signal
|
|
* EOF (avpkt->size == 0 && *got_picture_ptr == 0 && err >= 0).
|
|
*/
|
|
|
|
do {
|
|
p = &fctx->threads[finished++];
|
|
|
|
if (atomic_load(&p->state) != STATE_INPUT_READY) {
|
|
pthread_mutex_lock(&p->progress_mutex);
|
|
while (atomic_load_explicit(&p->state, memory_order_relaxed) != STATE_INPUT_READY)
|
|
pthread_cond_wait(&p->output_cond, &p->progress_mutex);
|
|
pthread_mutex_unlock(&p->progress_mutex);
|
|
}
|
|
|
|
av_frame_move_ref(picture, p->frame);
|
|
*got_picture_ptr = p->got_frame;
|
|
picture->pkt_dts = p->avpkt.dts;
|
|
err = p->result;
|
|
|
|
/*
|
|
* A later call with avkpt->size == 0 may loop over all threads,
|
|
* including this one, searching for a frame/error to return before being
|
|
* stopped by the "finished != fctx->next_finished" condition.
|
|
* Make sure we don't mistakenly return the same frame/error again.
|
|
*/
|
|
p->got_frame = 0;
|
|
p->result = 0;
|
|
|
|
if (finished >= avctx->thread_count) finished = 0;
|
|
} while (!avpkt->size && !*got_picture_ptr && err >= 0 && 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 */
|
|
if (err >= 0)
|
|
err = avpkt->size;
|
|
finish:
|
|
async_lock(fctx);
|
|
return err;
|
|
}
|
|
|
|
void ff_thread_report_progress(ThreadFrame *f, int n, int field)
|
|
{
|
|
PerThreadContext *p;
|
|
atomic_int *progress = f->progress ? (atomic_int*)f->progress->data : NULL;
|
|
|
|
if (!progress ||
|
|
atomic_load_explicit(&progress[field], memory_order_relaxed) >= n)
|
|
return;
|
|
|
|
p = f->owner[field]->internal->thread_ctx;
|
|
|
|
if (atomic_load_explicit(&p->debug_threads, memory_order_relaxed))
|
|
av_log(f->owner[field], AV_LOG_DEBUG,
|
|
"%p finished %d field %d\n", progress, n, field);
|
|
|
|
pthread_mutex_lock(&p->progress_mutex);
|
|
|
|
atomic_store_explicit(&progress[field], n, memory_order_release);
|
|
|
|
pthread_cond_broadcast(&p->progress_cond);
|
|
pthread_mutex_unlock(&p->progress_mutex);
|
|
}
|
|
|
|
void ff_thread_await_progress(ThreadFrame *f, int n, int field)
|
|
{
|
|
PerThreadContext *p;
|
|
atomic_int *progress = f->progress ? (atomic_int*)f->progress->data : NULL;
|
|
|
|
if (!progress ||
|
|
atomic_load_explicit(&progress[field], memory_order_acquire) >= n)
|
|
return;
|
|
|
|
p = f->owner[field]->internal->thread_ctx;
|
|
|
|
if (atomic_load_explicit(&p->debug_threads, memory_order_relaxed))
|
|
av_log(f->owner[field], AV_LOG_DEBUG,
|
|
"thread awaiting %d field %d from %p\n", n, field, progress);
|
|
|
|
pthread_mutex_lock(&p->progress_mutex);
|
|
while (atomic_load_explicit(&progress[field], memory_order_relaxed) < 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->internal->thread_ctx;
|
|
|
|
if (!(avctx->active_thread_type&FF_THREAD_FRAME)) return;
|
|
|
|
if (avctx->hwaccel && !p->hwaccel_serializing) {
|
|
pthread_mutex_lock(&p->parent->hwaccel_mutex);
|
|
p->hwaccel_serializing = 1;
|
|
}
|
|
|
|
/* this assumes that no hwaccel calls happen before ff_thread_finish_setup() */
|
|
if (avctx->hwaccel &&
|
|
!(avctx->hwaccel->caps_internal & HWACCEL_CAP_ASYNC_SAFE)) {
|
|
p->async_serializing = 1;
|
|
|
|
async_lock(p->parent);
|
|
}
|
|
|
|
pthread_mutex_lock(&p->progress_mutex);
|
|
if(atomic_load(&p->state) == STATE_SETUP_FINISHED){
|
|
av_log(avctx, AV_LOG_WARNING, "Multiple ff_thread_finish_setup() calls\n");
|
|
}
|
|
|
|
atomic_store(&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;
|
|
|
|
async_unlock(fctx);
|
|
|
|
for (i = 0; i < thread_count; i++) {
|
|
PerThreadContext *p = &fctx->threads[i];
|
|
|
|
if (atomic_load(&p->state) != STATE_INPUT_READY) {
|
|
pthread_mutex_lock(&p->progress_mutex);
|
|
while (atomic_load(&p->state) != STATE_INPUT_READY)
|
|
pthread_cond_wait(&p->output_cond, &p->progress_mutex);
|
|
pthread_mutex_unlock(&p->progress_mutex);
|
|
}
|
|
p->got_frame = 0;
|
|
}
|
|
|
|
async_lock(fctx);
|
|
}
|
|
|
|
void ff_frame_thread_free(AVCodecContext *avctx, int thread_count)
|
|
{
|
|
FrameThreadContext *fctx = avctx->internal->thread_ctx;
|
|
const AVCodec *codec = avctx->codec;
|
|
int i;
|
|
|
|
park_frame_worker_threads(fctx, thread_count);
|
|
|
|
if (fctx->prev_thread && fctx->prev_thread != fctx->threads)
|
|
if (update_context_from_thread(fctx->threads->avctx, fctx->prev_thread->avctx, 0) < 0) {
|
|
av_log(avctx, AV_LOG_ERROR, "Final thread update failed\n");
|
|
fctx->prev_thread->avctx->internal->is_copy = fctx->threads->avctx->internal->is_copy;
|
|
fctx->threads->avctx->internal->is_copy = 1;
|
|
}
|
|
|
|
for (i = 0; i < thread_count; i++) {
|
|
PerThreadContext *p = &fctx->threads[i];
|
|
|
|
pthread_mutex_lock(&p->mutex);
|
|
p->die = 1;
|
|
pthread_cond_signal(&p->input_cond);
|
|
pthread_mutex_unlock(&p->mutex);
|
|
|
|
if (p->thread_init)
|
|
pthread_join(p->thread, NULL);
|
|
p->thread_init=0;
|
|
|
|
if (codec->close && p->avctx)
|
|
codec->close(p->avctx);
|
|
|
|
release_delayed_buffers(p);
|
|
av_frame_free(&p->frame);
|
|
}
|
|
|
|
for (i = 0; i < thread_count; i++) {
|
|
PerThreadContext *p = &fctx->threads[i];
|
|
|
|
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_packet_unref(&p->avpkt);
|
|
av_freep(&p->released_buffers);
|
|
|
|
if (i && p->avctx) {
|
|
av_freep(&p->avctx->priv_data);
|
|
av_freep(&p->avctx->slice_offset);
|
|
}
|
|
|
|
if (p->avctx) {
|
|
av_freep(&p->avctx->internal);
|
|
av_buffer_unref(&p->avctx->hw_frames_ctx);
|
|
}
|
|
|
|
av_freep(&p->avctx);
|
|
}
|
|
|
|
av_freep(&fctx->threads);
|
|
pthread_mutex_destroy(&fctx->buffer_mutex);
|
|
pthread_mutex_destroy(&fctx->hwaccel_mutex);
|
|
pthread_mutex_destroy(&fctx->async_mutex);
|
|
pthread_cond_destroy(&fctx->async_cond);
|
|
|
|
av_freep(&avctx->internal->thread_ctx);
|
|
|
|
if (avctx->priv_data && avctx->codec && avctx->codec->priv_class)
|
|
av_opt_free(avctx->priv_data);
|
|
avctx->codec = NULL;
|
|
}
|
|
|
|
int ff_frame_thread_init(AVCodecContext *avctx)
|
|
{
|
|
int thread_count = avctx->thread_count;
|
|
const AVCodec *codec = avctx->codec;
|
|
AVCodecContext *src = avctx;
|
|
FrameThreadContext *fctx;
|
|
int i, err = 0;
|
|
|
|
if (!thread_count) {
|
|
int nb_cpus = av_cpu_count();
|
|
#if FF_API_DEBUG_MV
|
|
if ((avctx->debug & (FF_DEBUG_VIS_QP | FF_DEBUG_VIS_MB_TYPE)) || avctx->debug_mv)
|
|
nb_cpus = 1;
|
|
#endif
|
|
// 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->internal->thread_ctx = fctx = av_mallocz(sizeof(FrameThreadContext));
|
|
if (!fctx)
|
|
return AVERROR(ENOMEM);
|
|
|
|
fctx->threads = av_mallocz_array(thread_count, sizeof(PerThreadContext));
|
|
if (!fctx->threads) {
|
|
av_freep(&avctx->internal->thread_ctx);
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
|
|
pthread_mutex_init(&fctx->buffer_mutex, NULL);
|
|
pthread_mutex_init(&fctx->hwaccel_mutex, NULL);
|
|
pthread_mutex_init(&fctx->async_mutex, NULL);
|
|
pthread_cond_init(&fctx->async_cond, NULL);
|
|
|
|
fctx->async_lock = 1;
|
|
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->frame = av_frame_alloc();
|
|
if (!p->frame) {
|
|
av_freep(©);
|
|
err = AVERROR(ENOMEM);
|
|
goto error;
|
|
}
|
|
|
|
p->parent = fctx;
|
|
p->avctx = copy;
|
|
|
|
if (!copy) {
|
|
err = AVERROR(ENOMEM);
|
|
goto error;
|
|
}
|
|
|
|
*copy = *src;
|
|
|
|
copy->internal = av_malloc(sizeof(AVCodecInternal));
|
|
if (!copy->internal) {
|
|
copy->priv_data = NULL;
|
|
err = AVERROR(ENOMEM);
|
|
goto error;
|
|
}
|
|
*copy->internal = *src->internal;
|
|
copy->internal->thread_ctx = p;
|
|
copy->internal->last_pkt_props = &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->is_copy = 1;
|
|
|
|
if (codec->init_thread_copy)
|
|
err = codec->init_thread_copy(copy);
|
|
}
|
|
|
|
if (err) goto error;
|
|
|
|
atomic_init(&p->debug_threads, (copy->debug & FF_DEBUG_THREADS) != 0);
|
|
|
|
err = AVERROR(pthread_create(&p->thread, NULL, frame_worker_thread, p));
|
|
p->thread_init= !err;
|
|
if(!p->thread_init)
|
|
goto error;
|
|
}
|
|
|
|
return 0;
|
|
|
|
error:
|
|
ff_frame_thread_free(avctx, i+1);
|
|
|
|
return err;
|
|
}
|
|
|
|
void ff_thread_flush(AVCodecContext *avctx)
|
|
{
|
|
int i;
|
|
FrameThreadContext *fctx = avctx->internal->thread_ctx;
|
|
|
|
if (!fctx) 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);
|
|
}
|
|
|
|
fctx->next_decoding = fctx->next_finished = 0;
|
|
fctx->delaying = 1;
|
|
fctx->prev_thread = NULL;
|
|
for (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;
|
|
av_frame_unref(p->frame);
|
|
p->result = 0;
|
|
|
|
release_delayed_buffers(p);
|
|
|
|
if (avctx->codec->flush)
|
|
avctx->codec->flush(p->avctx);
|
|
}
|
|
}
|
|
|
|
int ff_thread_can_start_frame(AVCodecContext *avctx)
|
|
{
|
|
PerThreadContext *p = avctx->internal->thread_ctx;
|
|
if ((avctx->active_thread_type&FF_THREAD_FRAME) && atomic_load(&p->state) != STATE_SETTING_UP &&
|
|
(avctx->codec->update_thread_context || !THREAD_SAFE_CALLBACKS(avctx))) {
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static int thread_get_buffer_internal(AVCodecContext *avctx, ThreadFrame *f, int flags)
|
|
{
|
|
PerThreadContext *p = avctx->internal->thread_ctx;
|
|
int err;
|
|
|
|
f->owner[0] = f->owner[1] = avctx;
|
|
|
|
if (!(avctx->active_thread_type & FF_THREAD_FRAME))
|
|
return ff_get_buffer(avctx, f->f, flags);
|
|
|
|
if (atomic_load(&p->state) != STATE_SETTING_UP &&
|
|
(avctx->codec->update_thread_context || !THREAD_SAFE_CALLBACKS(avctx))) {
|
|
av_log(avctx, AV_LOG_ERROR, "get_buffer() cannot be called after ff_thread_finish_setup()\n");
|
|
return -1;
|
|
}
|
|
|
|
if (avctx->internal->allocate_progress) {
|
|
atomic_int *progress;
|
|
f->progress = av_buffer_alloc(2 * sizeof(*progress));
|
|
if (!f->progress) {
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
progress = (atomic_int*)f->progress->data;
|
|
|
|
atomic_init(&progress[0], -1);
|
|
atomic_init(&progress[1], -1);
|
|
}
|
|
|
|
pthread_mutex_lock(&p->parent->buffer_mutex);
|
|
if (THREAD_SAFE_CALLBACKS(avctx)) {
|
|
err = ff_get_buffer(avctx, f->f, flags);
|
|
} else {
|
|
pthread_mutex_lock(&p->progress_mutex);
|
|
p->requested_frame = f->f;
|
|
p->requested_flags = flags;
|
|
atomic_store_explicit(&p->state, STATE_GET_BUFFER, memory_order_release);
|
|
pthread_cond_broadcast(&p->progress_cond);
|
|
|
|
while (atomic_load(&p->state) != STATE_SETTING_UP)
|
|
pthread_cond_wait(&p->progress_cond, &p->progress_mutex);
|
|
|
|
err = p->result;
|
|
|
|
pthread_mutex_unlock(&p->progress_mutex);
|
|
|
|
}
|
|
if (!THREAD_SAFE_CALLBACKS(avctx) && !avctx->codec->update_thread_context)
|
|
ff_thread_finish_setup(avctx);
|
|
if (err)
|
|
av_buffer_unref(&f->progress);
|
|
|
|
pthread_mutex_unlock(&p->parent->buffer_mutex);
|
|
|
|
return err;
|
|
}
|
|
|
|
enum AVPixelFormat ff_thread_get_format(AVCodecContext *avctx, const enum AVPixelFormat *fmt)
|
|
{
|
|
enum AVPixelFormat res;
|
|
PerThreadContext *p = avctx->internal->thread_ctx;
|
|
if (!(avctx->active_thread_type & FF_THREAD_FRAME) || avctx->thread_safe_callbacks ||
|
|
avctx->get_format == avcodec_default_get_format)
|
|
return ff_get_format(avctx, fmt);
|
|
if (atomic_load(&p->state) != STATE_SETTING_UP) {
|
|
av_log(avctx, AV_LOG_ERROR, "get_format() cannot be called after ff_thread_finish_setup()\n");
|
|
return -1;
|
|
}
|
|
pthread_mutex_lock(&p->progress_mutex);
|
|
p->available_formats = fmt;
|
|
atomic_store(&p->state, STATE_GET_FORMAT);
|
|
pthread_cond_broadcast(&p->progress_cond);
|
|
|
|
while (atomic_load(&p->state) != STATE_SETTING_UP)
|
|
pthread_cond_wait(&p->progress_cond, &p->progress_mutex);
|
|
|
|
res = p->result_format;
|
|
|
|
pthread_mutex_unlock(&p->progress_mutex);
|
|
|
|
return res;
|
|
}
|
|
|
|
int ff_thread_get_buffer(AVCodecContext *avctx, ThreadFrame *f, int flags)
|
|
{
|
|
int ret = thread_get_buffer_internal(avctx, f, flags);
|
|
if (ret < 0)
|
|
av_log(avctx, AV_LOG_ERROR, "thread_get_buffer() failed\n");
|
|
return ret;
|
|
}
|
|
|
|
void ff_thread_release_buffer(AVCodecContext *avctx, ThreadFrame *f)
|
|
{
|
|
PerThreadContext *p = avctx->internal->thread_ctx;
|
|
FrameThreadContext *fctx;
|
|
AVFrame *dst, *tmp;
|
|
int can_direct_free = !(avctx->active_thread_type & FF_THREAD_FRAME) ||
|
|
THREAD_SAFE_CALLBACKS(avctx);
|
|
|
|
if (!f->f || !f->f->buf[0])
|
|
return;
|
|
|
|
if (avctx->debug & FF_DEBUG_BUFFERS)
|
|
av_log(avctx, AV_LOG_DEBUG, "thread_release_buffer called on pic %p\n", f);
|
|
|
|
av_buffer_unref(&f->progress);
|
|
f->owner[0] = f->owner[1] = NULL;
|
|
|
|
if (can_direct_free) {
|
|
av_frame_unref(f->f);
|
|
return;
|
|
}
|
|
|
|
fctx = p->parent;
|
|
pthread_mutex_lock(&fctx->buffer_mutex);
|
|
|
|
if (p->num_released_buffers + 1 >= INT_MAX / sizeof(*p->released_buffers))
|
|
goto fail;
|
|
tmp = av_fast_realloc(p->released_buffers, &p->released_buffers_allocated,
|
|
(p->num_released_buffers + 1) *
|
|
sizeof(*p->released_buffers));
|
|
if (!tmp)
|
|
goto fail;
|
|
p->released_buffers = tmp;
|
|
|
|
dst = &p->released_buffers[p->num_released_buffers];
|
|
av_frame_move_ref(dst, f->f);
|
|
|
|
p->num_released_buffers++;
|
|
|
|
fail:
|
|
pthread_mutex_unlock(&fctx->buffer_mutex);
|
|
}
|