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897 lines
28 KiB
897 lines
28 KiB
/* |
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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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* Frame 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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#include <stdatomic.h> |
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#include <stdint.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 "compat/w32pthreads.h" |
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#endif |
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|
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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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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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///< 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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/** |
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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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|
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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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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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} 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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|
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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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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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|
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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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|
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while (1) { |
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if (atomic_load(&p->state) == STATE_INPUT_READY) { |
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pthread_mutex_lock(&p->mutex); |
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while (atomic_load(&p->state) == STATE_INPUT_READY) { |
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if (p->die) { |
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pthread_mutex_unlock(&p->mutex); |
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goto die; |
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} |
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pthread_cond_wait(&p->input_cond, &p->mutex); |
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} |
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pthread_mutex_unlock(&p->mutex); |
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} |
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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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|
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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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|
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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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pthread_mutex_unlock(&p->parent->async_mutex); |
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} |
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atomic_store(&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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die: |
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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->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->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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#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->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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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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/// 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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|
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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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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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|
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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, 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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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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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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av_packet_ref(&p->avpkt, avpkt); |
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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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/* |
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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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|
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if (!p->avctx->thread_safe_callbacks && |
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p->avctx->get_buffer2 != avcodec_default_get_buffer2) { |
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while (atomic_load(&p->state) != STATE_SETUP_FINISHED && |
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atomic_load(&p->state) != STATE_INPUT_READY) { |
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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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if (atomic_load_explicit(&p->state, memory_order_acquire) == STATE_GET_BUFFER) { |
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p->result = ff_get_buffer(p->avctx, p->requested_frame, p->requested_flags); |
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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, ret; |
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|
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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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pthread_mutex_unlock(&fctx->async_mutex); |
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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]; |
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err = update_context_from_user(p->avctx, avctx); |
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if (err) |
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goto finish; |
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err = submit_packet(p, avpkt); |
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if (err) |
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goto finish; |
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|
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/* |
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* If we're still receiving the initial packets, don't return a frame. |
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*/ |
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if (fctx->delaying) { |
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if (fctx->next_decoding >= (avctx->thread_count-1)) fctx->delaying = 0; |
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*got_picture_ptr=0; |
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if (avpkt->size) { |
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ret = avpkt->size; |
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goto finish; |
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} |
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} |
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|
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/* |
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* Return the next available frame from the oldest thread. |
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* If we're at the end of the stream, then we have to skip threads that |
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* didn't output a frame, because we don't want to accidentally signal |
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* EOF (avpkt->size == 0 && *got_picture_ptr == 0). |
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*/ |
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|
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do { |
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p = &fctx->threads[finished++]; |
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|
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if (atomic_load(&p->state) != STATE_INPUT_READY) { |
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pthread_mutex_lock(&p->progress_mutex); |
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while (atomic_load_explicit(&p->state, memory_order_relaxed) != STATE_INPUT_READY) |
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pthread_cond_wait(&p->output_cond, &p->progress_mutex); |
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pthread_mutex_unlock(&p->progress_mutex); |
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} |
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|
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av_frame_move_ref(picture, p->frame); |
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*got_picture_ptr = p->got_frame; |
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picture->pkt_dts = p->avpkt.dts; |
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|
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/* |
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* A later call with avkpt->size == 0 may loop over all threads, |
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* including this one, searching for a frame to return before being |
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* stopped by the "finished != fctx->next_finished" condition. |
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* Make sure we don't mistakenly return the same frame again. |
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*/ |
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p->got_frame = 0; |
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|
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if (finished >= avctx->thread_count) finished = 0; |
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} while (!avpkt->size && !*got_picture_ptr && finished != fctx->next_finished); |
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|
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update_context_from_thread(avctx, p->avctx, 1); |
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|
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if (fctx->next_decoding >= avctx->thread_count) fctx->next_decoding = 0; |
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|
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fctx->next_finished = finished; |
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|
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/* return the size of the consumed packet if no error occurred */ |
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ret = (p->result >= 0) ? avpkt->size : p->result; |
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finish: |
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pthread_mutex_lock(&fctx->async_mutex); |
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if (err < 0) |
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return err; |
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return ret; |
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} |
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|
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void ff_thread_report_progress(ThreadFrame *f, int n, int field) |
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{ |
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PerThreadContext *p; |
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atomic_int *progress = f->progress ? (atomic_int*)f->progress->data : NULL; |
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|
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if (!progress || |
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atomic_load_explicit(&progress[field], memory_order_relaxed) >= n) |
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return; |
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|
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p = f->owner->internal->thread_ctx; |
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|
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if (f->owner->debug&FF_DEBUG_THREADS) |
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av_log(f->owner, AV_LOG_DEBUG, "%p finished %d field %d\n", progress, n, field); |
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|
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pthread_mutex_lock(&p->progress_mutex); |
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|
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atomic_store_explicit(&progress[field], n, memory_order_release); |
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|
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pthread_cond_broadcast(&p->progress_cond); |
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pthread_mutex_unlock(&p->progress_mutex); |
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} |
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|
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void ff_thread_await_progress(ThreadFrame *f, int n, int field) |
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{ |
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PerThreadContext *p; |
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atomic_int *progress = f->progress ? (atomic_int*)f->progress->data : NULL; |
|
|
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if (!progress || |
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atomic_load_explicit(&progress[field], memory_order_acquire) >= n) |
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return; |
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|
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p = f->owner->internal->thread_ctx; |
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|
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if (f->owner->debug&FF_DEBUG_THREADS) |
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av_log(f->owner, AV_LOG_DEBUG, "thread awaiting %d field %d from %p\n", n, field, progress); |
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|
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pthread_mutex_lock(&p->progress_mutex); |
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while (atomic_load_explicit(&progress[field], memory_order_relaxed) < n) |
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pthread_cond_wait(&p->progress_cond, &p->progress_mutex); |
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pthread_mutex_unlock(&p->progress_mutex); |
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} |
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|
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void ff_thread_finish_setup(AVCodecContext *avctx) { |
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PerThreadContext *p = avctx->internal->thread_ctx; |
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|
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if (!(avctx->active_thread_type&FF_THREAD_FRAME)) return; |
|
|
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if (avctx->hwaccel && !p->hwaccel_serializing) { |
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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; |
|
pthread_mutex_lock(&p->parent->async_mutex); |
|
} |
|
|
|
pthread_mutex_lock(&p->progress_mutex); |
|
|
|
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; |
|
|
|
pthread_mutex_unlock(&fctx->async_mutex); |
|
|
|
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); |
|
} |
|
} |
|
|
|
pthread_mutex_lock(&fctx->async_mutex); |
|
} |
|
|
|
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) |
|
update_context_from_thread(fctx->threads->avctx, fctx->prev_thread->avctx, 0); |
|
|
|
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); |
|
|
|
if (codec->close) |
|
codec->close(p->avctx); |
|
|
|
avctx->codec = NULL; |
|
|
|
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) { |
|
av_freep(&p->avctx->priv_data); |
|
av_freep(&p->avctx->slice_offset); |
|
} |
|
|
|
av_buffer_unref(&p->avctx->hw_frames_ctx); |
|
|
|
av_freep(&p->avctx->internal); |
|
av_freep(&p->avctx); |
|
} |
|
|
|
av_freep(&fctx->threads); |
|
pthread_mutex_destroy(&fctx->buffer_mutex); |
|
pthread_mutex_destroy(&fctx->hwaccel_mutex); |
|
|
|
pthread_mutex_unlock(&fctx->async_mutex); |
|
pthread_mutex_destroy(&fctx->async_mutex); |
|
|
|
av_freep(&avctx->internal->thread_ctx); |
|
} |
|
|
|
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 HAVE_W32THREADS |
|
w32thread_init(); |
|
#endif |
|
|
|
if (!thread_count) { |
|
int nb_cpus = av_cpu_count(); |
|
av_log(avctx, AV_LOG_DEBUG, "detected %d logical cores\n", nb_cpus); |
|
// 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(sizeof(PerThreadContext) * thread_count); |
|
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_mutex_lock(&fctx->async_mutex); |
|
|
|
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) { |
|
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; |
|
|
|
if (!pthread_create(&p->thread, NULL, frame_worker_thread, p)) |
|
p->thread_init = 1; |
|
} |
|
|
|
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); |
|
|
|
release_delayed_buffers(p); |
|
|
|
if (avctx->codec->flush) |
|
avctx->codec->flush(p->avctx); |
|
} |
|
} |
|
|
|
int ff_thread_get_buffer(AVCodecContext *avctx, ThreadFrame *f, int flags) |
|
{ |
|
PerThreadContext *p = avctx->internal->thread_ctx; |
|
int err; |
|
|
|
f->owner = 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 || !avctx->thread_safe_callbacks)) { |
|
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 (avctx->thread_safe_callbacks || |
|
avctx->get_buffer2 == avcodec_default_get_buffer2) { |
|
err = ff_get_buffer(avctx, f->f, flags); |
|
} else { |
|
p->requested_frame = f->f; |
|
p->requested_flags = flags; |
|
atomic_store_explicit(&p->state, STATE_GET_BUFFER, memory_order_release); |
|
pthread_mutex_lock(&p->progress_mutex); |
|
pthread_cond_signal(&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 (!avctx->thread_safe_callbacks && !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; |
|
} |
|
|
|
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) || |
|
avctx->thread_safe_callbacks || |
|
avctx->get_buffer2 == avcodec_default_get_buffer2; |
|
|
|
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 = 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); |
|
}
|
|
|