| 0,0 → 1,1193 |
|---|
| /* |
| * Copyright (c) 2004 Roman Shaposhnik |
| * Copyright (c) 2008 Alexander Strange (astrange@ithinksw.com) |
| * |
| * Many thanks to Steven M. Schultz for providing clever ideas and |
| * to Michael Niedermayer <michaelni@gmx.at> for writing initial |
| * implementation. |
| * |
| * 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 |
| * Multithreading support functions |
| * @see doc/multithreading.txt |
| */ |
| |
| #include "config.h" |
| |
| #include "avcodec.h" |
| #include "internal.h" |
| #include "thread.h" |
| #include "libavutil/avassert.h" |
| #include "libavutil/common.h" |
| #include "libavutil/cpu.h" |
| #include "libavutil/internal.h" |
| |
| #if HAVE_PTHREADS |
| #include <pthread.h> |
| #elif HAVE_W32THREADS |
| #include "compat/w32pthreads.h" |
| #elif HAVE_OS2THREADS |
| #include "compat/os2threads.h" |
| #endif |
| |
| typedef int (action_func)(AVCodecContext *c, void *arg); |
| typedef int (action_func2)(AVCodecContext *c, void *arg, int jobnr, int threadnr); |
| |
| typedef struct ThreadContext { |
| pthread_t *workers; |
| action_func *func; |
| action_func2 *func2; |
| void *args; |
| int *rets; |
| int rets_count; |
| int job_count; |
| int job_size; |
| |
| pthread_cond_t last_job_cond; |
| pthread_cond_t current_job_cond; |
| pthread_mutex_t current_job_lock; |
| unsigned current_execute; |
| int current_job; |
| int done; |
| |
| int *entries; |
| int entries_count; |
| int thread_count; |
| pthread_cond_t *progress_cond; |
| pthread_mutex_t *progress_mutex; |
| } ThreadContext; |
| |
| /** |
| * Context used by codec threads and stored in their AVCodecContext thread_opaque. |
| */ |
| typedef struct PerThreadContext { |
| struct FrameThreadContext *parent; |
| |
| pthread_t thread; |
| int thread_init; |
| 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). |
| uint8_t *buf; ///< backup storage for packet data when the input packet is not refcounted |
| int allocated_buf_size; ///< Size allocated for buf |
| |
| 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. |
| |
| enum { |
| STATE_INPUT_READY, ///< Set when the thread is awaiting a packet. |
| STATE_SETTING_UP, ///< Set before the codec has called ff_thread_finish_setup(). |
| STATE_GET_BUFFER, /**< |
| * Set when the codec calls get_buffer(). |
| * State is returned to STATE_SETTING_UP afterwards. |
| */ |
| STATE_GET_FORMAT, /**< |
| * Set when the codec calls get_format(). |
| * State is returned to STATE_SETTING_UP afterwards. |
| */ |
| STATE_SETUP_FINISHED ///< Set after the codec has called ff_thread_finish_setup(). |
| } state; |
| |
| /** |
| * Array of frames passed to ff_thread_release_buffer(). |
| * Frames are released after all threads referencing them are finished. |
| */ |
| AVFrame *released_buffers; |
| int num_released_buffers; |
| int released_buffers_allocated; |
| |
| AVFrame *requested_frame; ///< AVFrame the codec passed to get_buffer() |
| int requested_flags; ///< flags passed to get_buffer() for requested_frame |
| |
| const enum AVPixelFormat *available_formats; ///< Format array for get_format() |
| enum AVPixelFormat result_format; ///< get_format() result |
| } PerThreadContext; |
| |
| /** |
| * Context stored in the client AVCodecContext thread_opaque. |
| */ |
| typedef struct FrameThreadContext { |
| PerThreadContext *threads; ///< The contexts for each thread. |
| PerThreadContext *prev_thread; ///< The last thread submit_packet() was called on. |
| |
| pthread_mutex_t buffer_mutex; ///< Mutex used to protect get/release_buffer(). |
| |
| 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. |
| */ |
| |
| int die; ///< Set when threads should exit. |
| } FrameThreadContext; |
| |
| |
| /* H264 slice threading seems to be buggy with more than 16 threads, |
| * limit the number of threads to 16 for automatic detection */ |
| #define MAX_AUTO_THREADS 16 |
| |
| static void* attribute_align_arg worker(void *v) |
| { |
| AVCodecContext *avctx = v; |
| ThreadContext *c = avctx->thread_opaque; |
| unsigned last_execute = 0; |
| int our_job = c->job_count; |
| int thread_count = avctx->thread_count; |
| int self_id; |
| |
| pthread_mutex_lock(&c->current_job_lock); |
| self_id = c->current_job++; |
| for (;;){ |
| while (our_job >= c->job_count) { |
| if (c->current_job == thread_count + c->job_count) |
| pthread_cond_signal(&c->last_job_cond); |
| |
| while (last_execute == c->current_execute && !c->done) |
| pthread_cond_wait(&c->current_job_cond, &c->current_job_lock); |
| last_execute = c->current_execute; |
| our_job = self_id; |
| |
| if (c->done) { |
| pthread_mutex_unlock(&c->current_job_lock); |
| return NULL; |
| } |
| } |
| pthread_mutex_unlock(&c->current_job_lock); |
| |
| c->rets[our_job%c->rets_count] = c->func ? c->func(avctx, (char*)c->args + our_job*c->job_size): |
| c->func2(avctx, c->args, our_job, self_id); |
| |
| pthread_mutex_lock(&c->current_job_lock); |
| our_job = c->current_job++; |
| } |
| } |
| |
| static av_always_inline void avcodec_thread_park_workers(ThreadContext *c, int thread_count) |
| { |
| while (c->current_job != thread_count + c->job_count) |
| pthread_cond_wait(&c->last_job_cond, &c->current_job_lock); |
| pthread_mutex_unlock(&c->current_job_lock); |
| } |
| |
| static void thread_free(AVCodecContext *avctx) |
| { |
| ThreadContext *c = avctx->thread_opaque; |
| int i; |
| |
| pthread_mutex_lock(&c->current_job_lock); |
| c->done = 1; |
| pthread_cond_broadcast(&c->current_job_cond); |
| pthread_mutex_unlock(&c->current_job_lock); |
| |
| for (i=0; i<avctx->thread_count; i++) |
| pthread_join(c->workers[i], NULL); |
| |
| pthread_mutex_destroy(&c->current_job_lock); |
| pthread_cond_destroy(&c->current_job_cond); |
| pthread_cond_destroy(&c->last_job_cond); |
| av_free(c->workers); |
| av_freep(&avctx->thread_opaque); |
| } |
| |
| static int avcodec_thread_execute(AVCodecContext *avctx, action_func* func, void *arg, int *ret, int job_count, int job_size) |
| { |
| ThreadContext *c= avctx->thread_opaque; |
| int dummy_ret; |
| |
| if (!(avctx->active_thread_type&FF_THREAD_SLICE) || avctx->thread_count <= 1) |
| return avcodec_default_execute(avctx, func, arg, ret, job_count, job_size); |
| |
| if (job_count <= 0) |
| return 0; |
| |
| pthread_mutex_lock(&c->current_job_lock); |
| |
| c->current_job = avctx->thread_count; |
| c->job_count = job_count; |
| c->job_size = job_size; |
| c->args = arg; |
| c->func = func; |
| if (ret) { |
| c->rets = ret; |
| c->rets_count = job_count; |
| } else { |
| c->rets = &dummy_ret; |
| c->rets_count = 1; |
| } |
| c->current_execute++; |
| pthread_cond_broadcast(&c->current_job_cond); |
| |
| avcodec_thread_park_workers(c, avctx->thread_count); |
| |
| return 0; |
| } |
| |
| static int avcodec_thread_execute2(AVCodecContext *avctx, action_func2* func2, void *arg, int *ret, int job_count) |
| { |
| ThreadContext *c= avctx->thread_opaque; |
| c->func2 = func2; |
| return avcodec_thread_execute(avctx, NULL, arg, ret, job_count, 0); |
| } |
| |
| static int thread_init_internal(AVCodecContext *avctx) |
| { |
| int i; |
| ThreadContext *c; |
| int thread_count = avctx->thread_count; |
| |
| if (!thread_count) { |
| int nb_cpus = av_cpu_count(); |
| if (avctx->height) |
| nb_cpus = FFMIN(nb_cpus, (avctx->height+15)/16); |
| // use number of cores + 1 as thread count if there is more than one |
| if (nb_cpus > 1) |
| thread_count = avctx->thread_count = FFMIN(nb_cpus + 1, MAX_AUTO_THREADS); |
| else |
| thread_count = avctx->thread_count = 1; |
| } |
| |
| if (thread_count <= 1) { |
| avctx->active_thread_type = 0; |
| return 0; |
| } |
| |
| c = av_mallocz(sizeof(ThreadContext)); |
| if (!c) |
| return -1; |
| |
| c->workers = av_mallocz(sizeof(pthread_t)*thread_count); |
| if (!c->workers) { |
| av_free(c); |
| return -1; |
| } |
| |
| avctx->thread_opaque = c; |
| c->current_job = 0; |
| c->job_count = 0; |
| c->job_size = 0; |
| c->done = 0; |
| pthread_cond_init(&c->current_job_cond, NULL); |
| pthread_cond_init(&c->last_job_cond, NULL); |
| pthread_mutex_init(&c->current_job_lock, NULL); |
| pthread_mutex_lock(&c->current_job_lock); |
| for (i=0; i<thread_count; i++) { |
| if(pthread_create(&c->workers[i], NULL, worker, avctx)) { |
| avctx->thread_count = i; |
| pthread_mutex_unlock(&c->current_job_lock); |
| ff_thread_free(avctx); |
| return -1; |
| } |
| } |
| |
| avcodec_thread_park_workers(c, thread_count); |
| |
| avctx->execute = avcodec_thread_execute; |
| avctx->execute2 = avcodec_thread_execute2; |
| return 0; |
| } |
| |
| #define THREAD_SAFE_CALLBACKS(avctx) \ |
| ((avctx)->thread_safe_callbacks || (!(avctx)->get_buffer && (avctx)->get_buffer2 == avcodec_default_get_buffer2)) |
| |
| /** |
| * 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; |
| FrameThreadContext *fctx = p->parent; |
| AVCodecContext *avctx = p->avctx; |
| const AVCodec *codec = avctx->codec; |
| |
| pthread_mutex_lock(&p->mutex); |
| while (1) { |
| while (p->state == STATE_INPUT_READY && !fctx->die) |
| pthread_cond_wait(&p->input_cond, &p->mutex); |
| |
| if (fctx->die) break; |
| |
| if (!codec->update_thread_context && THREAD_SAFE_CALLBACKS(avctx)) |
| ff_thread_finish_setup(avctx); |
| |
| avcodec_get_frame_defaults(&p->frame); |
| p->got_frame = 0; |
| p->result = codec->decode(avctx, &p->frame, &p->got_frame, &p->avpkt); |
| |
| /* many decoders assign whole AVFrames, thus overwriting extended_data; |
| * make sure it's set correctly */ |
| p->frame.extended_data = p->frame.data; |
| |
| if (p->state == STATE_SETTING_UP) ff_thread_finish_setup(avctx); |
| |
| pthread_mutex_lock(&p->progress_mutex); |
| #if 0 //BUFREF-FIXME |
| for (i = 0; i < MAX_BUFFERS; i++) |
| if (p->progress_used[i] && (p->got_frame || p->result<0 || avctx->codec_id != AV_CODEC_ID_H264)) { |
| p->progress[i][0] = INT_MAX; |
| p->progress[i][1] = INT_MAX; |
| } |
| #endif |
| 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 |
| */ |
| static int update_context_from_thread(AVCodecContext *dst, AVCodecContext *src, int for_user) |
| { |
| int err = 0; |
| |
| if (dst != src) { |
| dst->time_base = src->time_base; |
| dst->width = src->width; |
| dst->height = src->height; |
| dst->pix_fmt = src->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->bits_per_coded_sample = src->bits_per_coded_sample; |
| dst->sample_aspect_ratio = src->sample_aspect_ratio; |
| dst->dtg_active_format = src->dtg_active_format; |
| |
| dst->profile = src->profile; |
| dst->level = src->level; |
| |
| dst->bits_per_raw_sample = src->bits_per_raw_sample; |
| dst->ticks_per_frame = src->ticks_per_frame; |
| 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->hwaccel = src->hwaccel; |
| dst->hwaccel_context = src->hwaccel_context; |
| |
| dst->channels = src->channels; |
| dst->sample_rate = src->sample_rate; |
| dst->sample_fmt = src->sample_fmt; |
| dst->channel_layout = src->channel_layout; |
| } |
| |
| if (for_user) { |
| dst->delay = src->thread_count - 1; |
| dst->coded_frame = src->coded_frame; |
| } else { |
| if (dst->codec->update_thread_context) |
| err = dst->codec->update_thread_context(dst, src); |
| } |
| |
| 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, AVCodecContext *src) |
| { |
| #define copy_fields(s, e) memcpy(&dst->s, &src->s, (char*)&dst->e - (char*)&dst->s); |
| dst->flags = src->flags; |
| |
| dst->draw_horiz_band= src->draw_horiz_band; |
| dst->get_buffer2 = src->get_buffer2; |
| #if FF_API_GET_BUFFER |
| FF_DISABLE_DEPRECATION_WARNINGS |
| dst->get_buffer = src->get_buffer; |
| dst->release_buffer = src->release_buffer; |
| FF_ENABLE_DEPRECATION_WARNINGS |
| #endif |
| |
| dst->opaque = src->opaque; |
| dst->debug = src->debug; |
| dst->debug_mv = src->debug_mv; |
| |
| dst->slice_flags = src->slice_flags; |
| dst->flags2 = src->flags2; |
| |
| copy_fields(skip_loop_filter, subtitle_header); |
| |
| dst->frame_number = src->frame_number; |
| dst->reordered_opaque = src->reordered_opaque; |
| dst->thread_safe_callbacks = src->thread_safe_callbacks; |
| |
| if (src->slice_count && src->slice_offset) { |
| if (dst->slice_count < src->slice_count) { |
| int *tmp = av_realloc(dst->slice_offset, src->slice_count * |
| sizeof(*dst->slice_offset)); |
| if (!tmp) { |
| av_free(dst->slice_offset); |
| return AVERROR(ENOMEM); |
| } |
| dst->slice_offset = tmp; |
| } |
| memcpy(dst->slice_offset, src->slice_offset, |
| src->slice_count * sizeof(*dst->slice_offset)); |
| } |
| dst->slice_count = src->slice_count; |
| return 0; |
| #undef copy_fields |
| } |
| |
| /// Releases the buffers that this decoding thread was the last user of. |
| static void release_delayed_buffers(PerThreadContext *p) |
| { |
| FrameThreadContext *fctx = p->parent; |
| |
| while (p->num_released_buffers > 0) { |
| AVFrame *f; |
| |
| pthread_mutex_lock(&fctx->buffer_mutex); |
| |
| // fix extended data in case the caller screwed it up |
| av_assert0(p->avctx->codec_type == AVMEDIA_TYPE_VIDEO || |
| p->avctx->codec_type == AVMEDIA_TYPE_AUDIO); |
| f = &p->released_buffers[--p->num_released_buffers]; |
| f->extended_data = f->data; |
| av_frame_unref(f); |
| |
| pthread_mutex_unlock(&fctx->buffer_mutex); |
| } |
| } |
| |
| static int submit_packet(PerThreadContext *p, AVPacket *avpkt) |
| { |
| FrameThreadContext *fctx = p->parent; |
| PerThreadContext *prev_thread = fctx->prev_thread; |
| const AVCodec *codec = p->avctx->codec; |
| |
| if (!avpkt->size && !(codec->capabilities & CODEC_CAP_DELAY)) return 0; |
| |
| pthread_mutex_lock(&p->mutex); |
| |
| release_delayed_buffers(p); |
| |
| if (prev_thread) { |
| int err; |
| if (prev_thread->state == STATE_SETTING_UP) { |
| pthread_mutex_lock(&prev_thread->progress_mutex); |
| while (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; |
| } |
| } |
| |
| av_buffer_unref(&p->avpkt.buf); |
| p->avpkt = *avpkt; |
| if (avpkt->buf) |
| p->avpkt.buf = av_buffer_ref(avpkt->buf); |
| else { |
| av_fast_malloc(&p->buf, &p->allocated_buf_size, avpkt->size + FF_INPUT_BUFFER_PADDING_SIZE); |
| p->avpkt.data = p->buf; |
| memcpy(p->buf, avpkt->data, avpkt->size); |
| memset(p->buf + avpkt->size, 0, FF_INPUT_BUFFER_PADDING_SIZE); |
| } |
| |
| p->state = STATE_SETTING_UP; |
| pthread_cond_signal(&p->input_cond); |
| pthread_mutex_unlock(&p->mutex); |
| |
| /* |
| * If the client doesn't have a thread-safe get_buffer(), |
| * then decoding threads call back to the main thread, |
| * and it calls back to the client here. |
| */ |
| |
| FF_DISABLE_DEPRECATION_WARNINGS |
| if (!p->avctx->thread_safe_callbacks && ( |
| p->avctx->get_format != avcodec_default_get_format || |
| #if FF_API_GET_BUFFER |
| p->avctx->get_buffer || |
| #endif |
| p->avctx->get_buffer2 != avcodec_default_get_buffer2)) { |
| FF_ENABLE_DEPRECATION_WARNINGS |
| while (p->state != STATE_SETUP_FINISHED && p->state != STATE_INPUT_READY) { |
| int call_done = 1; |
| pthread_mutex_lock(&p->progress_mutex); |
| while (p->state == STATE_SETTING_UP) |
| pthread_cond_wait(&p->progress_cond, &p->progress_mutex); |
| |
| switch (p->state) { |
| case STATE_GET_BUFFER: |
| p->result = ff_get_buffer(p->avctx, p->requested_frame, p->requested_flags); |
| break; |
| case STATE_GET_FORMAT: |
| p->result_format = p->avctx->get_format(p->avctx, p->available_formats); |
| break; |
| default: |
| call_done = 0; |
| break; |
| } |
| if (call_done) { |
| p->state = STATE_SETTING_UP; |
| pthread_cond_signal(&p->progress_cond); |
| } |
| pthread_mutex_unlock(&p->progress_mutex); |
| } |
| } |
| |
| fctx->prev_thread = p; |
| fctx->next_decoding++; |
| |
| return 0; |
| } |
| |
| int ff_thread_decode_frame(AVCodecContext *avctx, |
| AVFrame *picture, int *got_picture_ptr, |
| AVPacket *avpkt) |
| { |
| FrameThreadContext *fctx = avctx->thread_opaque; |
| int finished = fctx->next_finished; |
| PerThreadContext *p; |
| int err; |
| |
| /* |
| * Submit a packet to the next decoding thread. |
| */ |
| |
| p = &fctx->threads[fctx->next_decoding]; |
| err = update_context_from_user(p->avctx, avctx); |
| if (err) return err; |
| err = submit_packet(p, avpkt); |
| if (err) return err; |
| |
| /* |
| * If we're still receiving the initial packets, don't return a frame. |
| */ |
| |
| if (fctx->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) |
| return avpkt->size; |
| } |
| |
| /* |
| * Return the next available frame from the oldest thread. |
| * If we're at the end of the stream, then we have to skip threads that |
| * didn't output a frame, because we don't want to accidentally signal |
| * EOF (avpkt->size == 0 && *got_picture_ptr == 0). |
| */ |
| |
| do { |
| p = &fctx->threads[finished++]; |
| |
| if (p->state != STATE_INPUT_READY) { |
| pthread_mutex_lock(&p->progress_mutex); |
| while (p->state != STATE_INPUT_READY) |
| pthread_cond_wait(&p->output_cond, &p->progress_mutex); |
| pthread_mutex_unlock(&p->progress_mutex); |
| } |
| |
| av_frame_move_ref(picture, &p->frame); |
| *got_picture_ptr = p->got_frame; |
| picture->pkt_dts = p->avpkt.dts; |
| |
| /* |
| * A later call with avkpt->size == 0 may loop over all threads, |
| * including this one, searching for a frame to return before being |
| * stopped by the "finished != fctx->next_finished" condition. |
| * Make sure we don't mistakenly return the same frame again. |
| */ |
| p->got_frame = 0; |
| |
| if (finished >= avctx->thread_count) finished = 0; |
| } while (!avpkt->size && !*got_picture_ptr && finished != fctx->next_finished); |
| |
| update_context_from_thread(avctx, p->avctx, 1); |
| |
| if (fctx->next_decoding >= avctx->thread_count) fctx->next_decoding = 0; |
| |
| fctx->next_finished = finished; |
| |
| /* return the size of the consumed packet if no error occurred */ |
| return (p->result >= 0) ? avpkt->size : p->result; |
| } |
| |
| void ff_thread_report_progress(ThreadFrame *f, int n, int field) |
| { |
| PerThreadContext *p; |
| volatile int *progress = f->progress ? (int*)f->progress->data : NULL; |
| |
| if (!progress || progress[field] >= n) return; |
| |
| p = f->owner->thread_opaque; |
| |
| if (f->owner->debug&FF_DEBUG_THREADS) |
| av_log(f->owner, AV_LOG_DEBUG, "%p finished %d field %d\n", progress, n, field); |
| |
| pthread_mutex_lock(&p->progress_mutex); |
| progress[field] = n; |
| pthread_cond_broadcast(&p->progress_cond); |
| pthread_mutex_unlock(&p->progress_mutex); |
| } |
| |
| void ff_thread_await_progress(ThreadFrame *f, int n, int field) |
| { |
| PerThreadContext *p; |
| volatile int *progress = f->progress ? (int*)f->progress->data : NULL; |
| |
| if (!progress || progress[field] >= n) return; |
| |
| p = f->owner->thread_opaque; |
| |
| if (f->owner->debug&FF_DEBUG_THREADS) |
| av_log(f->owner, AV_LOG_DEBUG, "thread awaiting %d field %d from %p\n", n, field, progress); |
| |
| pthread_mutex_lock(&p->progress_mutex); |
| while (progress[field] < n) |
| pthread_cond_wait(&p->progress_cond, &p->progress_mutex); |
| pthread_mutex_unlock(&p->progress_mutex); |
| } |
| |
| void ff_thread_finish_setup(AVCodecContext *avctx) { |
| PerThreadContext *p = avctx->thread_opaque; |
| |
| if (!(avctx->active_thread_type&FF_THREAD_FRAME)) return; |
| |
| if(p->state == STATE_SETUP_FINISHED){ |
| av_log(avctx, AV_LOG_WARNING, "Multiple ff_thread_finish_setup() calls\n"); |
| } |
| |
| pthread_mutex_lock(&p->progress_mutex); |
| p->state = STATE_SETUP_FINISHED; |
| pthread_cond_broadcast(&p->progress_cond); |
| pthread_mutex_unlock(&p->progress_mutex); |
| } |
| |
| /// Waits for all threads to finish. |
| static void park_frame_worker_threads(FrameThreadContext *fctx, int thread_count) |
| { |
| int i; |
| |
| for (i = 0; i < thread_count; i++) { |
| PerThreadContext *p = &fctx->threads[i]; |
| |
| if (p->state != STATE_INPUT_READY) { |
| pthread_mutex_lock(&p->progress_mutex); |
| while (p->state != STATE_INPUT_READY) |
| pthread_cond_wait(&p->output_cond, &p->progress_mutex); |
| pthread_mutex_unlock(&p->progress_mutex); |
| } |
| p->got_frame = 0; |
| } |
| } |
| |
| static void frame_thread_free(AVCodecContext *avctx, int thread_count) |
| { |
| FrameThreadContext *fctx = avctx->thread_opaque; |
| 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; |
| } |
| |
| fctx->die = 1; |
| |
| for (i = 0; i < thread_count; i++) { |
| PerThreadContext *p = &fctx->threads[i]; |
| |
| pthread_mutex_lock(&p->mutex); |
| pthread_cond_signal(&p->input_cond); |
| pthread_mutex_unlock(&p->mutex); |
| |
| if (p->thread_init) |
| pthread_join(p->thread, NULL); |
| p->thread_init=0; |
| |
| if (codec->close) |
| codec->close(p->avctx); |
| |
| avctx->codec = NULL; |
| |
| release_delayed_buffers(p); |
| av_frame_unref(&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_buffer_unref(&p->avpkt.buf); |
| av_freep(&p->buf); |
| av_freep(&p->released_buffers); |
| |
| if (i) { |
| av_freep(&p->avctx->priv_data); |
| av_freep(&p->avctx->internal); |
| av_freep(&p->avctx->slice_offset); |
| } |
| |
| av_freep(&p->avctx); |
| } |
| |
| av_freep(&fctx->threads); |
| pthread_mutex_destroy(&fctx->buffer_mutex); |
| av_freep(&avctx->thread_opaque); |
| } |
| |
| static int frame_thread_init(AVCodecContext *avctx) |
| { |
| int thread_count = avctx->thread_count; |
| const AVCodec *codec = avctx->codec; |
| AVCodecContext *src = avctx; |
| FrameThreadContext *fctx; |
| int i, err = 0; |
| |
| if (!thread_count) { |
| int nb_cpus = av_cpu_count(); |
| if ((avctx->debug & (FF_DEBUG_VIS_QP | FF_DEBUG_VIS_MB_TYPE)) || avctx->debug_mv) |
| nb_cpus = 1; |
| // use number of cores + 1 as thread count if there is more than one |
| if (nb_cpus > 1) |
| thread_count = avctx->thread_count = FFMIN(nb_cpus + 1, MAX_AUTO_THREADS); |
| else |
| thread_count = avctx->thread_count = 1; |
| } |
| |
| if (thread_count <= 1) { |
| avctx->active_thread_type = 0; |
| return 0; |
| } |
| |
| avctx->thread_opaque = fctx = av_mallocz(sizeof(FrameThreadContext)); |
| |
| fctx->threads = av_mallocz(sizeof(PerThreadContext) * thread_count); |
| pthread_mutex_init(&fctx->buffer_mutex, NULL); |
| fctx->delaying = 1; |
| |
| for (i = 0; i < thread_count; i++) { |
| AVCodecContext *copy = av_malloc(sizeof(AVCodecContext)); |
| PerThreadContext *p = &fctx->threads[i]; |
| |
| pthread_mutex_init(&p->mutex, NULL); |
| pthread_mutex_init(&p->progress_mutex, NULL); |
| pthread_cond_init(&p->input_cond, NULL); |
| pthread_cond_init(&p->progress_cond, NULL); |
| pthread_cond_init(&p->output_cond, NULL); |
| |
| p->parent = fctx; |
| p->avctx = copy; |
| |
| if (!copy) { |
| err = AVERROR(ENOMEM); |
| goto error; |
| } |
| |
| *copy = *src; |
| copy->thread_opaque = p; |
| copy->pkt = &p->avpkt; |
| |
| if (!i) { |
| src = copy; |
| |
| if (codec->init) |
| err = codec->init(copy); |
| |
| update_context_from_thread(avctx, copy, 1); |
| } else { |
| copy->priv_data = av_malloc(codec->priv_data_size); |
| if (!copy->priv_data) { |
| err = AVERROR(ENOMEM); |
| goto error; |
| } |
| memcpy(copy->priv_data, src->priv_data, codec->priv_data_size); |
| copy->internal = av_malloc(sizeof(AVCodecInternal)); |
| if (!copy->internal) { |
| err = AVERROR(ENOMEM); |
| goto error; |
| } |
| *copy->internal = *src->internal; |
| copy->internal->is_copy = 1; |
| |
| if (codec->init_thread_copy) |
| err = codec->init_thread_copy(copy); |
| } |
| |
| if (err) goto error; |
| |
| err = AVERROR(pthread_create(&p->thread, NULL, frame_worker_thread, p)); |
| p->thread_init= !err; |
| if(!p->thread_init) |
| goto error; |
| } |
| |
| return 0; |
| |
| error: |
| frame_thread_free(avctx, i+1); |
| |
| return err; |
| } |
| |
| void ff_thread_flush(AVCodecContext *avctx) |
| { |
| int i; |
| FrameThreadContext *fctx = avctx->thread_opaque; |
| |
| if (!avctx->thread_opaque) return; |
| |
| park_frame_worker_threads(fctx, avctx->thread_count); |
| if (fctx->prev_thread) { |
| if (fctx->prev_thread != &fctx->threads[0]) |
| update_context_from_thread(fctx->threads[0].avctx, fctx->prev_thread->avctx, 0); |
| if (avctx->codec->flush) |
| avctx->codec->flush(fctx->threads[0].avctx); |
| } |
| |
| fctx->next_decoding = fctx->next_finished = 0; |
| fctx->delaying = 1; |
| fctx->prev_thread = NULL; |
| for (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); |
| } |
| } |
| |
| int ff_thread_can_start_frame(AVCodecContext *avctx) |
| { |
| PerThreadContext *p = avctx->thread_opaque; |
| if ((avctx->active_thread_type&FF_THREAD_FRAME) && 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->thread_opaque; |
| int err; |
| |
| f->owner = avctx; |
| |
| ff_init_buffer_info(avctx, f->f); |
| |
| if (!(avctx->active_thread_type & FF_THREAD_FRAME)) |
| return ff_get_buffer(avctx, f->f, flags); |
| |
| if (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) { |
| int *progress; |
| f->progress = av_buffer_alloc(2 * sizeof(int)); |
| if (!f->progress) { |
| return AVERROR(ENOMEM); |
| } |
| progress = (int*)f->progress->data; |
| |
| progress[0] = progress[1] = -1; |
| } |
| |
| pthread_mutex_lock(&p->parent->buffer_mutex); |
| |
| FF_DISABLE_DEPRECATION_WARNINGS |
| if (avctx->thread_safe_callbacks || ( |
| #if FF_API_GET_BUFFER |
| !avctx->get_buffer && |
| #endif |
| avctx->get_buffer2 == avcodec_default_get_buffer2)) { |
| FF_ENABLE_DEPRECATION_WARNINGS |
| err = ff_get_buffer(avctx, f->f, flags); |
| } else { |
| pthread_mutex_lock(&p->progress_mutex); |
| p->requested_frame = f->f; |
| p->requested_flags = flags; |
| p->state = STATE_GET_BUFFER; |
| pthread_cond_broadcast(&p->progress_cond); |
| |
| while (p->state != STATE_SETTING_UP) |
| pthread_cond_wait(&p->progress_cond, &p->progress_mutex); |
| |
| err = p->result; |
| |
| pthread_mutex_unlock(&p->progress_mutex); |
| |
| } |
| if (!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->thread_opaque; |
| if (!(avctx->active_thread_type & FF_THREAD_FRAME) || avctx->thread_safe_callbacks || |
| avctx->get_format == avcodec_default_get_format) |
| return avctx->get_format(avctx, fmt); |
| if (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; |
| p->state = STATE_GET_FORMAT; |
| pthread_cond_broadcast(&p->progress_cond); |
| |
| while (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->thread_opaque; |
| FrameThreadContext *fctx; |
| AVFrame *dst, *tmp; |
| FF_DISABLE_DEPRECATION_WARNINGS |
| int can_direct_free = !(avctx->active_thread_type & FF_THREAD_FRAME) || |
| avctx->thread_safe_callbacks || |
| ( |
| #if FF_API_GET_BUFFER |
| !avctx->get_buffer && |
| #endif |
| avctx->get_buffer2 == avcodec_default_get_buffer2); |
| FF_ENABLE_DEPRECATION_WARNINGS |
| |
| if (!f->f->data[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); |
| } |
| |
| /** |
| * Set the threading algorithms used. |
| * |
| * Threading requires more than one thread. |
| * Frame threading requires entire frames to be passed to the codec, |
| * and introduces extra decoding delay, so is incompatible with low_delay. |
| * |
| * @param avctx The context. |
| */ |
| static void validate_thread_parameters(AVCodecContext *avctx) |
| { |
| int frame_threading_supported = (avctx->codec->capabilities & CODEC_CAP_FRAME_THREADS) |
| && !(avctx->flags & CODEC_FLAG_TRUNCATED) |
| && !(avctx->flags & CODEC_FLAG_LOW_DELAY) |
| && !(avctx->flags2 & CODEC_FLAG2_CHUNKS); |
| if (avctx->thread_count == 1) { |
| avctx->active_thread_type = 0; |
| } else if (frame_threading_supported && (avctx->thread_type & FF_THREAD_FRAME)) { |
| avctx->active_thread_type = FF_THREAD_FRAME; |
| } else if (avctx->codec->capabilities & CODEC_CAP_SLICE_THREADS && |
| avctx->thread_type & FF_THREAD_SLICE) { |
| avctx->active_thread_type = FF_THREAD_SLICE; |
| } else if (!(avctx->codec->capabilities & CODEC_CAP_AUTO_THREADS)) { |
| avctx->thread_count = 1; |
| avctx->active_thread_type = 0; |
| } |
| |
| if (avctx->thread_count > MAX_AUTO_THREADS) |
| av_log(avctx, AV_LOG_WARNING, |
| "Application has requested %d threads. Using a thread count greater than %d is not recommended.\n", |
| avctx->thread_count, MAX_AUTO_THREADS); |
| } |
| |
| int ff_thread_init(AVCodecContext *avctx) |
| { |
| #if HAVE_W32THREADS |
| w32thread_init(); |
| #endif |
| |
| validate_thread_parameters(avctx); |
| |
| if (avctx->active_thread_type&FF_THREAD_SLICE) |
| return thread_init_internal(avctx); |
| else if (avctx->active_thread_type&FF_THREAD_FRAME) |
| return frame_thread_init(avctx); |
| |
| return 0; |
| } |
| |
| void ff_thread_free(AVCodecContext *avctx) |
| { |
| if (avctx->active_thread_type&FF_THREAD_FRAME) |
| frame_thread_free(avctx, avctx->thread_count); |
| else |
| thread_free(avctx); |
| } |
| |
| void ff_thread_report_progress2(AVCodecContext *avctx, int field, int thread, int n) |
| { |
| ThreadContext *p = avctx->thread_opaque; |
| int *entries = p->entries; |
| |
| pthread_mutex_lock(&p->progress_mutex[thread]); |
| entries[field] +=n; |
| pthread_cond_signal(&p->progress_cond[thread]); |
| pthread_mutex_unlock(&p->progress_mutex[thread]); |
| } |
| |
| void ff_thread_await_progress2(AVCodecContext *avctx, int field, int thread, int shift) |
| { |
| ThreadContext *p = avctx->thread_opaque; |
| int *entries = p->entries; |
| |
| if (!entries || !field) return; |
| |
| thread = thread ? thread - 1 : p->thread_count - 1; |
| |
| pthread_mutex_lock(&p->progress_mutex[thread]); |
| while ((entries[field - 1] - entries[field]) < shift){ |
| pthread_cond_wait(&p->progress_cond[thread], &p->progress_mutex[thread]); |
| } |
| pthread_mutex_unlock(&p->progress_mutex[thread]); |
| } |
| |
| int ff_alloc_entries(AVCodecContext *avctx, int count) |
| { |
| int i; |
| |
| if (avctx->active_thread_type & FF_THREAD_SLICE) { |
| ThreadContext *p = avctx->thread_opaque; |
| p->thread_count = avctx->thread_count; |
| p->entries = av_mallocz(count * sizeof(int)); |
| |
| if (!p->entries) { |
| return AVERROR(ENOMEM); |
| } |
| |
| p->entries_count = count; |
| p->progress_mutex = av_malloc(p->thread_count * sizeof(pthread_mutex_t)); |
| p->progress_cond = av_malloc(p->thread_count * sizeof(pthread_cond_t)); |
| |
| for (i = 0; i < p->thread_count; i++) { |
| pthread_mutex_init(&p->progress_mutex[i], NULL); |
| pthread_cond_init(&p->progress_cond[i], NULL); |
| } |
| } |
| |
| return 0; |
| } |
| |
| void ff_reset_entries(AVCodecContext *avctx) |
| { |
| ThreadContext *p = avctx->thread_opaque; |
| memset(p->entries, 0, p->entries_count * sizeof(int)); |
| } |