| /* |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| /** |
| * @file |
| * Frame multithreading support functions |
| * @see doc/multithreading.txt |
| */ |
| |
| #include "config.h" |
| |
| #include <stdatomic.h> |
| #include <stdint.h> |
| |
| #include "avcodec.h" |
| #include "avcodec_internal.h" |
| #include "codec_internal.h" |
| #include "decode.h" |
| #include "hwaccel_internal.h" |
| #include "hwconfig.h" |
| #include "internal.h" |
| #include "pthread_internal.h" |
| #include "refstruct.h" |
| #include "thread.h" |
| #include "threadframe.h" |
| #include "version_major.h" |
| |
| #include "libavutil/avassert.h" |
| #include "libavutil/buffer.h" |
| #include "libavutil/common.h" |
| #include "libavutil/cpu.h" |
| #include "libavutil/frame.h" |
| #include "libavutil/internal.h" |
| #include "libavutil/log.h" |
| #include "libavutil/mem.h" |
| #include "libavutil/opt.h" |
| #include "libavutil/thread.h" |
| |
| enum { |
| /// Set when the thread is awaiting a packet. |
| STATE_INPUT_READY, |
| /// Set before the codec has called ff_thread_finish_setup(). |
| STATE_SETTING_UP, |
| /// Set after the codec has called ff_thread_finish_setup(). |
| STATE_SETUP_FINISHED, |
| }; |
| |
| enum { |
| UNINITIALIZED, ///< Thread has not been created, AVCodec->close mustn't be called |
| NEEDS_CLOSE, ///< FFCodec->close needs to be called |
| INITIALIZED, ///< Thread has been properly set up |
| }; |
| |
| typedef struct ThreadFrameProgress { |
| atomic_int progress[2]; |
| } ThreadFrameProgress; |
| |
| /** |
| * Context used by codec threads and stored in their AVCodecInternal thread_ctx. |
| */ |
| typedef struct PerThreadContext { |
| struct FrameThreadContext *parent; |
| |
| pthread_t thread; |
| int thread_init; |
| unsigned pthread_init_cnt;///< Number of successfully initialized mutexes/conditions |
| pthread_cond_t input_cond; ///< Used to wait for a new packet from the main thread. |
| pthread_cond_t progress_cond; ///< Used by child threads to wait for progress to change. |
| pthread_cond_t output_cond; ///< Used by the main thread to wait for frames to finish. |
| |
| pthread_mutex_t mutex; ///< Mutex used to protect the contents of the PerThreadContext. |
| pthread_mutex_t progress_mutex; ///< Mutex used to protect frame progress values and progress_cond. |
| |
| AVCodecContext *avctx; ///< Context used to decode packets passed to this thread. |
| |
| AVPacket *avpkt; ///< Input packet (for decoding) or output (for encoding). |
| |
| AVFrame *frame; ///< Output frame (for decoding) or input (for encoding). |
| int got_frame; ///< The output of got_picture_ptr from the last avcodec_decode_video() call. |
| int result; ///< The result of the last codec decode/encode() call. |
| |
| atomic_int state; |
| |
| int die; ///< Set when the thread should exit. |
| |
| int hwaccel_serializing; |
| int async_serializing; |
| |
| // set to 1 in ff_thread_finish_setup() when a threadsafe hwaccel is used; |
| // cannot check hwaccel caps directly, because |
| // worked threads clear hwaccel state for thread-unsafe hwaccels |
| // after each decode call |
| int hwaccel_threadsafe; |
| |
| atomic_int debug_threads; ///< Set if the FF_DEBUG_THREADS option is set. |
| } PerThreadContext; |
| |
| /** |
| * Context stored in the client AVCodecInternal thread_ctx. |
| */ |
| typedef struct FrameThreadContext { |
| PerThreadContext *threads; ///< The contexts for each thread. |
| PerThreadContext *prev_thread; ///< The last thread submit_packet() was called on. |
| |
| unsigned pthread_init_cnt; ///< Number of successfully initialized mutexes/conditions |
| pthread_mutex_t buffer_mutex; ///< Mutex used to protect get/release_buffer(). |
| /** |
| * This lock is used for ensuring threads run in serial when thread-unsafe |
| * hwaccel is used. |
| */ |
| pthread_mutex_t hwaccel_mutex; |
| pthread_mutex_t async_mutex; |
| pthread_cond_t async_cond; |
| int async_lock; |
| |
| int next_decoding; ///< The next context to submit a packet to. |
| int next_finished; ///< The next context to return output from. |
| |
| int delaying; /**< |
| * Set for the first N packets, where N is the number of threads. |
| * While it is set, ff_thread_en/decode_frame won't return any results. |
| */ |
| |
| /* hwaccel state for thread-unsafe hwaccels is temporarily stored here in |
| * order to transfer its ownership to the next decoding thread without the |
| * need for extra synchronization */ |
| const AVHWAccel *stash_hwaccel; |
| void *stash_hwaccel_context; |
| void *stash_hwaccel_priv; |
| } FrameThreadContext; |
| |
| static int hwaccel_serial(const AVCodecContext *avctx) |
| { |
| return avctx->hwaccel && !(ffhwaccel(avctx->hwaccel)->caps_internal & HWACCEL_CAP_THREAD_SAFE); |
| } |
| |
| static void async_lock(FrameThreadContext *fctx) |
| { |
| pthread_mutex_lock(&fctx->async_mutex); |
| while (fctx->async_lock) |
| pthread_cond_wait(&fctx->async_cond, &fctx->async_mutex); |
| fctx->async_lock = 1; |
| pthread_mutex_unlock(&fctx->async_mutex); |
| } |
| |
| static void async_unlock(FrameThreadContext *fctx) |
| { |
| pthread_mutex_lock(&fctx->async_mutex); |
| av_assert0(fctx->async_lock); |
| fctx->async_lock = 0; |
| pthread_cond_broadcast(&fctx->async_cond); |
| pthread_mutex_unlock(&fctx->async_mutex); |
| } |
| |
| static void thread_set_name(PerThreadContext *p) |
| { |
| AVCodecContext *avctx = p->avctx; |
| int idx = p - p->parent->threads; |
| char name[16]; |
| |
| snprintf(name, sizeof(name), "av:%.7s:df%d", avctx->codec->name, idx); |
| |
| ff_thread_setname(name); |
| } |
| |
| /** |
| * Codec worker thread. |
| * |
| * Automatically calls ff_thread_finish_setup() if the codec does |
| * not provide an update_thread_context method, or if the codec returns |
| * before calling it. |
| */ |
| static attribute_align_arg void *frame_worker_thread(void *arg) |
| { |
| PerThreadContext *p = arg; |
| AVCodecContext *avctx = p->avctx; |
| const FFCodec *codec = ffcodec(avctx->codec); |
| |
| thread_set_name(p); |
| |
| pthread_mutex_lock(&p->mutex); |
| while (1) { |
| while (atomic_load(&p->state) == STATE_INPUT_READY && !p->die) |
| pthread_cond_wait(&p->input_cond, &p->mutex); |
| |
| if (p->die) break; |
| |
| if (!codec->update_thread_context) |
| ff_thread_finish_setup(avctx); |
| |
| /* If a decoder supports hwaccel, then it must call ff_get_format(). |
| * Since that call must happen before ff_thread_finish_setup(), the |
| * decoder is required to implement update_thread_context() and call |
| * ff_thread_finish_setup() manually. Therefore the above |
| * ff_thread_finish_setup() call did not happen and hwaccel_serializing |
| * cannot be true here. */ |
| av_assert0(!p->hwaccel_serializing); |
| |
| /* if the previous thread uses thread-unsafe hwaccel then we take the |
| * lock to ensure the threads don't run concurrently */ |
| if (hwaccel_serial(avctx)) { |
| pthread_mutex_lock(&p->parent->hwaccel_mutex); |
| p->hwaccel_serializing = 1; |
| } |
| |
| av_frame_unref(p->frame); |
| p->got_frame = 0; |
| p->result = codec->cb.decode(avctx, p->frame, &p->got_frame, p->avpkt); |
| |
| if ((p->result < 0 || !p->got_frame) && p->frame->buf[0]) |
| av_frame_unref(p->frame); |
| |
| if (atomic_load(&p->state) == STATE_SETTING_UP) |
| ff_thread_finish_setup(avctx); |
| |
| if (p->hwaccel_serializing) { |
| /* wipe hwaccel state for thread-unsafe hwaccels to avoid stale |
| * pointers lying around; |
| * the state was transferred to FrameThreadContext in |
| * ff_thread_finish_setup(), so nothing is leaked */ |
| avctx->hwaccel = NULL; |
| avctx->hwaccel_context = NULL; |
| avctx->internal->hwaccel_priv_data = NULL; |
| |
| p->hwaccel_serializing = 0; |
| pthread_mutex_unlock(&p->parent->hwaccel_mutex); |
| } |
| av_assert0(!avctx->hwaccel || |
| (ffhwaccel(avctx->hwaccel)->caps_internal & HWACCEL_CAP_THREAD_SAFE)); |
| |
| if (p->async_serializing) { |
| p->async_serializing = 0; |
| |
| async_unlock(p->parent); |
| } |
| |
| pthread_mutex_lock(&p->progress_mutex); |
| |
| atomic_store(&p->state, STATE_INPUT_READY); |
| |
| pthread_cond_broadcast(&p->progress_cond); |
| pthread_cond_signal(&p->output_cond); |
| pthread_mutex_unlock(&p->progress_mutex); |
| } |
| pthread_mutex_unlock(&p->mutex); |
| |
| return NULL; |
| } |
| |
| /** |
| * Update the next thread's AVCodecContext with values from the reference thread's context. |
| * |
| * @param dst The destination context. |
| * @param src The source context. |
| * @param for_user 0 if the destination is a codec thread, 1 if the destination is the user's thread |
| * @return 0 on success, negative error code on failure |
| */ |
| static int update_context_from_thread(AVCodecContext *dst, const AVCodecContext *src, int for_user) |
| { |
| const FFCodec *const codec = ffcodec(dst->codec); |
| int err = 0; |
| |
| if (dst != src && (for_user || codec->update_thread_context)) { |
| dst->time_base = src->time_base; |
| dst->framerate = src->framerate; |
| dst->width = src->width; |
| dst->height = src->height; |
| dst->pix_fmt = src->pix_fmt; |
| dst->sw_pix_fmt = src->sw_pix_fmt; |
| |
| dst->coded_width = src->coded_width; |
| dst->coded_height = src->coded_height; |
| |
| dst->has_b_frames = src->has_b_frames; |
| dst->idct_algo = src->idct_algo; |
| dst->properties = src->properties; |
| |
| dst->bits_per_coded_sample = src->bits_per_coded_sample; |
| dst->sample_aspect_ratio = src->sample_aspect_ratio; |
| |
| dst->profile = src->profile; |
| dst->level = src->level; |
| |
| dst->bits_per_raw_sample = src->bits_per_raw_sample; |
| #if FF_API_TICKS_PER_FRAME |
| FF_DISABLE_DEPRECATION_WARNINGS |
| dst->ticks_per_frame = src->ticks_per_frame; |
| FF_ENABLE_DEPRECATION_WARNINGS |
| #endif |
| dst->color_primaries = src->color_primaries; |
| |
| dst->color_trc = src->color_trc; |
| dst->colorspace = src->colorspace; |
| dst->color_range = src->color_range; |
| dst->chroma_sample_location = src->chroma_sample_location; |
| |
| dst->sample_rate = src->sample_rate; |
| dst->sample_fmt = src->sample_fmt; |
| err = av_channel_layout_copy(&dst->ch_layout, &src->ch_layout); |
| if (err < 0) |
| return err; |
| |
| if (!!dst->hw_frames_ctx != !!src->hw_frames_ctx || |
| (dst->hw_frames_ctx && dst->hw_frames_ctx->data != src->hw_frames_ctx->data)) { |
| av_buffer_unref(&dst->hw_frames_ctx); |
| |
| if (src->hw_frames_ctx) { |
| dst->hw_frames_ctx = av_buffer_ref(src->hw_frames_ctx); |
| if (!dst->hw_frames_ctx) |
| return AVERROR(ENOMEM); |
| } |
| } |
| |
| dst->hwaccel_flags = src->hwaccel_flags; |
| |
| ff_refstruct_replace(&dst->internal->pool, src->internal->pool); |
| } |
| |
| if (for_user) { |
| if (codec->update_thread_context_for_user) |
| err = codec->update_thread_context_for_user(dst, src); |
| } else { |
| const PerThreadContext *p_src = src->internal->thread_ctx; |
| PerThreadContext *p_dst = dst->internal->thread_ctx; |
| |
| if (codec->update_thread_context) { |
| err = codec->update_thread_context(dst, src); |
| if (err < 0) |
| return err; |
| } |
| |
| // reset dst hwaccel state if needed |
| av_assert0(p_dst->hwaccel_threadsafe || |
| (!dst->hwaccel && !dst->internal->hwaccel_priv_data)); |
| if (p_dst->hwaccel_threadsafe && |
| (!p_src->hwaccel_threadsafe || dst->hwaccel != src->hwaccel)) { |
| ff_hwaccel_uninit(dst); |
| p_dst->hwaccel_threadsafe = 0; |
| } |
| |
| // propagate hwaccel state for threadsafe hwaccels |
| if (p_src->hwaccel_threadsafe) { |
| const FFHWAccel *hwaccel = ffhwaccel(src->hwaccel); |
| if (!dst->hwaccel) { |
| if (hwaccel->priv_data_size) { |
| av_assert0(hwaccel->update_thread_context); |
| |
| dst->internal->hwaccel_priv_data = |
| av_mallocz(hwaccel->priv_data_size); |
| if (!dst->internal->hwaccel_priv_data) |
| return AVERROR(ENOMEM); |
| } |
| dst->hwaccel = src->hwaccel; |
| } |
| av_assert0(dst->hwaccel == src->hwaccel); |
| |
| if (hwaccel->update_thread_context) { |
| err = hwaccel->update_thread_context(dst, src); |
| if (err < 0) { |
| av_log(dst, AV_LOG_ERROR, "Error propagating hwaccel state\n"); |
| ff_hwaccel_uninit(dst); |
| return err; |
| } |
| } |
| p_dst->hwaccel_threadsafe = 1; |
| } |
| } |
| |
| return err; |
| } |
| |
| /** |
| * Update the next thread's AVCodecContext with values set by the user. |
| * |
| * @param dst The destination context. |
| * @param src The source context. |
| * @return 0 on success, negative error code on failure |
| */ |
| static int update_context_from_user(AVCodecContext *dst, const AVCodecContext *src) |
| { |
| int err; |
| |
| dst->flags = src->flags; |
| |
| dst->draw_horiz_band= src->draw_horiz_band; |
| dst->get_buffer2 = src->get_buffer2; |
| |
| dst->opaque = src->opaque; |
| dst->debug = src->debug; |
| |
| dst->slice_flags = src->slice_flags; |
| dst->flags2 = src->flags2; |
| dst->export_side_data = src->export_side_data; |
| |
| dst->skip_loop_filter = src->skip_loop_filter; |
| dst->skip_idct = src->skip_idct; |
| dst->skip_frame = src->skip_frame; |
| |
| dst->frame_num = src->frame_num; |
| |
| av_packet_unref(dst->internal->last_pkt_props); |
| err = av_packet_copy_props(dst->internal->last_pkt_props, src->internal->last_pkt_props); |
| if (err < 0) |
| return err; |
| |
| return 0; |
| } |
| |
| static int submit_packet(PerThreadContext *p, AVCodecContext *user_avctx, |
| AVPacket *avpkt) |
| { |
| FrameThreadContext *fctx = p->parent; |
| PerThreadContext *prev_thread = fctx->prev_thread; |
| const AVCodec *codec = p->avctx->codec; |
| int ret; |
| |
| if (!avpkt->size && !(codec->capabilities & AV_CODEC_CAP_DELAY)) |
| return 0; |
| |
| pthread_mutex_lock(&p->mutex); |
| |
| ret = update_context_from_user(p->avctx, user_avctx); |
| if (ret) { |
| pthread_mutex_unlock(&p->mutex); |
| return ret; |
| } |
| atomic_store_explicit(&p->debug_threads, |
| (p->avctx->debug & FF_DEBUG_THREADS) != 0, |
| memory_order_relaxed); |
| |
| if (prev_thread) { |
| int err; |
| if (atomic_load(&prev_thread->state) == STATE_SETTING_UP) { |
| pthread_mutex_lock(&prev_thread->progress_mutex); |
| while (atomic_load(&prev_thread->state) == STATE_SETTING_UP) |
| pthread_cond_wait(&prev_thread->progress_cond, &prev_thread->progress_mutex); |
| pthread_mutex_unlock(&prev_thread->progress_mutex); |
| } |
| |
| err = update_context_from_thread(p->avctx, prev_thread->avctx, 0); |
| if (err) { |
| pthread_mutex_unlock(&p->mutex); |
| return err; |
| } |
| } |
| |
| /* transfer the stashed hwaccel state, if any */ |
| av_assert0(!p->avctx->hwaccel || p->hwaccel_threadsafe); |
| if (!p->hwaccel_threadsafe) { |
| FFSWAP(const AVHWAccel*, p->avctx->hwaccel, fctx->stash_hwaccel); |
| FFSWAP(void*, p->avctx->hwaccel_context, fctx->stash_hwaccel_context); |
| FFSWAP(void*, p->avctx->internal->hwaccel_priv_data, fctx->stash_hwaccel_priv); |
| } |
| |
| av_packet_unref(p->avpkt); |
| ret = av_packet_ref(p->avpkt, avpkt); |
| if (ret < 0) { |
| pthread_mutex_unlock(&p->mutex); |
| av_log(p->avctx, AV_LOG_ERROR, "av_packet_ref() failed in submit_packet()\n"); |
| return ret; |
| } |
| |
| atomic_store(&p->state, STATE_SETTING_UP); |
| pthread_cond_signal(&p->input_cond); |
| pthread_mutex_unlock(&p->mutex); |
| |
| fctx->prev_thread = p; |
| fctx->next_decoding++; |
| |
| return 0; |
| } |
| |
| int ff_thread_decode_frame(AVCodecContext *avctx, |
| AVFrame *picture, int *got_picture_ptr, |
| AVPacket *avpkt) |
| { |
| FrameThreadContext *fctx = avctx->internal->thread_ctx; |
| int finished = fctx->next_finished; |
| PerThreadContext *p; |
| int err; |
| |
| /* release the async lock, permitting blocked hwaccel threads to |
| * go forward while we are in this function */ |
| async_unlock(fctx); |
| |
| /* |
| * Submit a packet to the next decoding thread. |
| */ |
| |
| 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 ? f->progress->progress : 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(const ThreadFrame *f, int n, int field) |
| { |
| PerThreadContext *p; |
| atomic_int *progress = f->progress ? f->progress->progress : 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; |
| |
| if (!(avctx->active_thread_type&FF_THREAD_FRAME)) return; |
| |
| p = avctx->internal->thread_ctx; |
| |
| p->hwaccel_threadsafe = avctx->hwaccel && |
| (ffhwaccel(avctx->hwaccel)->caps_internal & HWACCEL_CAP_THREAD_SAFE); |
| |
| if (hwaccel_serial(avctx) && !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 && |
| !(ffhwaccel(avctx->hwaccel)->caps_internal & HWACCEL_CAP_ASYNC_SAFE)) { |
| p->async_serializing = 1; |
| |
| async_lock(p->parent); |
| } |
| |
| /* thread-unsafe hwaccels share a single private data instance, so we |
| * save hwaccel state for passing to the next thread; |
| * this is done here so that this worker thread can wipe its own hwaccel |
| * state after decoding, without requiring synchronization */ |
| av_assert0(!p->parent->stash_hwaccel); |
| if (hwaccel_serial(avctx)) { |
| p->parent->stash_hwaccel = avctx->hwaccel; |
| p->parent->stash_hwaccel_context = avctx->hwaccel_context; |
| p->parent->stash_hwaccel_priv = avctx->internal->hwaccel_priv_data; |
| } |
| |
| 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); |
| } |
| |
| #define OFF(member) offsetof(FrameThreadContext, member) |
| DEFINE_OFFSET_ARRAY(FrameThreadContext, thread_ctx, pthread_init_cnt, |
| (OFF(buffer_mutex), OFF(hwaccel_mutex), OFF(async_mutex)), |
| (OFF(async_cond))); |
| #undef OFF |
| |
| #define OFF(member) offsetof(PerThreadContext, member) |
| DEFINE_OFFSET_ARRAY(PerThreadContext, per_thread, pthread_init_cnt, |
| (OFF(progress_mutex), OFF(mutex)), |
| (OFF(input_cond), OFF(progress_cond), OFF(output_cond))); |
| #undef OFF |
| |
| void ff_frame_thread_free(AVCodecContext *avctx, int thread_count) |
| { |
| FrameThreadContext *fctx = avctx->internal->thread_ctx; |
| const FFCodec *codec = ffcodec(avctx->codec); |
| int i; |
| |
| park_frame_worker_threads(fctx, thread_count); |
| |
| for (i = 0; i < thread_count; i++) { |
| PerThreadContext *p = &fctx->threads[i]; |
| AVCodecContext *ctx = p->avctx; |
| |
| if (ctx->internal) { |
| if (p->thread_init == INITIALIZED) { |
| pthread_mutex_lock(&p->mutex); |
| p->die = 1; |
| pthread_cond_signal(&p->input_cond); |
| pthread_mutex_unlock(&p->mutex); |
| |
| pthread_join(p->thread, NULL); |
| } |
| if (codec->close && p->thread_init != UNINITIALIZED) |
| codec->close(ctx); |
| |
| /* When using a threadsafe hwaccel, this is where |
| * each thread's context is uninit'd and freed. */ |
| ff_hwaccel_uninit(ctx); |
| |
| if (ctx->priv_data) { |
| if (codec->p.priv_class) |
| av_opt_free(ctx->priv_data); |
| av_freep(&ctx->priv_data); |
| } |
| |
| ff_refstruct_unref(&ctx->internal->pool); |
| av_packet_free(&ctx->internal->last_pkt_props); |
| av_freep(&ctx->internal); |
| av_buffer_unref(&ctx->hw_frames_ctx); |
| av_frame_side_data_free(&ctx->decoded_side_data, |
| &ctx->nb_decoded_side_data); |
| } |
| |
| av_frame_free(&p->frame); |
| |
| ff_pthread_free(p, per_thread_offsets); |
| av_packet_free(&p->avpkt); |
| |
| av_freep(&p->avctx); |
| } |
| |
| av_freep(&fctx->threads); |
| ff_pthread_free(fctx, thread_ctx_offsets); |
| |
| /* if we have stashed hwaccel state, move it to the user-facing context, |
| * so it will be freed in ff_codec_close() */ |
| av_assert0(!avctx->hwaccel); |
| FFSWAP(const AVHWAccel*, avctx->hwaccel, fctx->stash_hwaccel); |
| FFSWAP(void*, avctx->hwaccel_context, fctx->stash_hwaccel_context); |
| FFSWAP(void*, avctx->internal->hwaccel_priv_data, fctx->stash_hwaccel_priv); |
| |
| av_freep(&avctx->internal->thread_ctx); |
| } |
| |
| static av_cold int init_thread(PerThreadContext *p, int *threads_to_free, |
| FrameThreadContext *fctx, AVCodecContext *avctx, |
| const FFCodec *codec, int first) |
| { |
| AVCodecContext *copy; |
| int err; |
| |
| atomic_init(&p->state, STATE_INPUT_READY); |
| |
| copy = av_memdup(avctx, sizeof(*avctx)); |
| if (!copy) |
| return AVERROR(ENOMEM); |
| copy->priv_data = NULL; |
| copy->decoded_side_data = NULL; |
| copy->nb_decoded_side_data = 0; |
| |
| /* From now on, this PerThreadContext will be cleaned up by |
| * ff_frame_thread_free in case of errors. */ |
| (*threads_to_free)++; |
| |
| p->parent = fctx; |
| p->avctx = copy; |
| |
| copy->internal = ff_decode_internal_alloc(); |
| if (!copy->internal) |
| return AVERROR(ENOMEM); |
| copy->internal->thread_ctx = p; |
| copy->internal->progress_frame_pool = avctx->internal->progress_frame_pool; |
| |
| copy->delay = avctx->delay; |
| |
| if (codec->priv_data_size) { |
| copy->priv_data = av_mallocz(codec->priv_data_size); |
| if (!copy->priv_data) |
| return AVERROR(ENOMEM); |
| |
| if (codec->p.priv_class) { |
| *(const AVClass **)copy->priv_data = codec->p.priv_class; |
| err = av_opt_copy(copy->priv_data, avctx->priv_data); |
| if (err < 0) |
| return err; |
| } |
| } |
| |
| err = ff_pthread_init(p, per_thread_offsets); |
| if (err < 0) |
| return err; |
| |
| if (!(p->frame = av_frame_alloc()) || |
| !(p->avpkt = av_packet_alloc())) |
| return AVERROR(ENOMEM); |
| |
| if (!first) |
| copy->internal->is_copy = 1; |
| |
| copy->internal->last_pkt_props = av_packet_alloc(); |
| if (!copy->internal->last_pkt_props) |
| return AVERROR(ENOMEM); |
| |
| if (codec->init) { |
| err = codec->init(copy); |
| if (err < 0) { |
| if (codec->caps_internal & FF_CODEC_CAP_INIT_CLEANUP) |
| p->thread_init = NEEDS_CLOSE; |
| return err; |
| } |
| } |
| p->thread_init = NEEDS_CLOSE; |
| |
| if (first) { |
| update_context_from_thread(avctx, copy, 1); |
| |
| av_frame_side_data_free(&avctx->decoded_side_data, &avctx->nb_decoded_side_data); |
| for (int i = 0; i < copy->nb_decoded_side_data; i++) { |
| err = av_frame_side_data_clone(&avctx->decoded_side_data, |
| &avctx->nb_decoded_side_data, |
| copy->decoded_side_data[i], 0); |
| if (err < 0) |
| return err; |
| } |
| } |
| |
| atomic_init(&p->debug_threads, (copy->debug & FF_DEBUG_THREADS) != 0); |
| |
| err = AVERROR(pthread_create(&p->thread, NULL, frame_worker_thread, p)); |
| if (err < 0) |
| return err; |
| p->thread_init = INITIALIZED; |
| |
| return 0; |
| } |
| |
| int ff_frame_thread_init(AVCodecContext *avctx) |
| { |
| int thread_count = avctx->thread_count; |
| const FFCodec *codec = ffcodec(avctx->codec); |
| FrameThreadContext *fctx; |
| int err, i = 0; |
| |
| if (!thread_count) { |
| int nb_cpus = av_cpu_count(); |
| // 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); |
| |
| err = ff_pthread_init(fctx, thread_ctx_offsets); |
| if (err < 0) { |
| ff_pthread_free(fctx, thread_ctx_offsets); |
| av_freep(&avctx->internal->thread_ctx); |
| return err; |
| } |
| |
| fctx->async_lock = 1; |
| fctx->delaying = 1; |
| |
| if (codec->p.type == AVMEDIA_TYPE_VIDEO) |
| avctx->delay = avctx->thread_count - 1; |
| |
| fctx->threads = av_calloc(thread_count, sizeof(*fctx->threads)); |
| if (!fctx->threads) { |
| err = AVERROR(ENOMEM); |
| goto error; |
| } |
| |
| for (; i < thread_count; ) { |
| PerThreadContext *p = &fctx->threads[i]; |
| int first = !i; |
| |
| err = init_thread(p, &i, fctx, avctx, codec, first); |
| if (err < 0) |
| goto error; |
| } |
| |
| return 0; |
| |
| error: |
| ff_frame_thread_free(avctx, i); |
| 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; |
| |
| if (ffcodec(avctx->codec)->flush) |
| ffcodec(avctx->codec)->flush(p->avctx); |
| } |
| } |
| |
| int ff_thread_can_start_frame(AVCodecContext *avctx) |
| { |
| if ((avctx->active_thread_type & FF_THREAD_FRAME) && |
| ffcodec(avctx->codec)->update_thread_context) { |
| PerThreadContext *p = avctx->internal->thread_ctx; |
| |
| if (atomic_load(&p->state) != STATE_SETTING_UP) |
| return 0; |
| } |
| |
| return 1; |
| } |
| |
| static int thread_get_buffer_internal(AVCodecContext *avctx, AVFrame *f, int flags) |
| { |
| PerThreadContext *p; |
| int err; |
| |
| if (!(avctx->active_thread_type & FF_THREAD_FRAME)) |
| return ff_get_buffer(avctx, f, flags); |
| |
| p = avctx->internal->thread_ctx; |
| if (atomic_load(&p->state) != STATE_SETTING_UP && |
| ffcodec(avctx->codec)->update_thread_context) { |
| av_log(avctx, AV_LOG_ERROR, "get_buffer() cannot be called after ff_thread_finish_setup()\n"); |
| return -1; |
| } |
| |
| pthread_mutex_lock(&p->parent->buffer_mutex); |
| err = ff_get_buffer(avctx, f, flags); |
| |
| pthread_mutex_unlock(&p->parent->buffer_mutex); |
| |
| return err; |
| } |
| |
| int ff_thread_get_buffer(AVCodecContext *avctx, AVFrame *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; |
| } |
| |
| int ff_thread_get_ext_buffer(AVCodecContext *avctx, ThreadFrame *f, int flags) |
| { |
| int ret; |
| |
| f->owner[0] = f->owner[1] = avctx; |
| /* Hint: It is possible for this function to be called with codecs |
| * that don't support frame threading at all, namely in case |
| * a frame-threaded decoder shares code with codecs that are not. |
| * This currently affects non-MPEG-4 mpegvideo codecs. |
| * The following check will always be true for them. */ |
| if (!(avctx->active_thread_type & FF_THREAD_FRAME)) |
| return ff_get_buffer(avctx, f->f, flags); |
| |
| f->progress = ff_refstruct_allocz(sizeof(*f->progress)); |
| if (!f->progress) |
| return AVERROR(ENOMEM); |
| |
| atomic_init(&f->progress->progress[0], -1); |
| atomic_init(&f->progress->progress[1], -1); |
| |
| ret = ff_thread_get_buffer(avctx, f->f, flags); |
| if (ret) |
| ff_refstruct_unref(&f->progress); |
| return ret; |
| } |
| |
| void ff_thread_release_ext_buffer(ThreadFrame *f) |
| { |
| ff_refstruct_unref(&f->progress); |
| f->owner[0] = f->owner[1] = NULL; |
| if (f->f) |
| av_frame_unref(f->f); |
| } |
| |
| enum ThreadingStatus ff_thread_sync_ref(AVCodecContext *avctx, size_t offset) |
| { |
| PerThreadContext *p; |
| const void *ref; |
| |
| if (!avctx->internal->is_copy) |
| return avctx->active_thread_type & FF_THREAD_FRAME ? |
| FF_THREAD_IS_FIRST_THREAD : FF_THREAD_NO_FRAME_THREADING; |
| |
| p = avctx->internal->thread_ctx; |
| |
| av_assert1(memcpy(&ref, (char*)avctx->priv_data + offset, sizeof(ref)) && ref == NULL); |
| |
| memcpy(&ref, (const char*)p->parent->threads[0].avctx->priv_data + offset, sizeof(ref)); |
| av_assert1(ref); |
| ff_refstruct_replace((char*)avctx->priv_data + offset, ref); |
| |
| return FF_THREAD_IS_COPY; |
| } |