yading@10: /*
yading@10:  * Copyright (c) 2004 Roman Shaposhnik
yading@10:  * Copyright (c) 2008 Alexander Strange (astrange@ithinksw.com)
yading@10:  *
yading@10:  * Many thanks to Steven M. Schultz for providing clever ideas and
yading@10:  * to Michael Niedermayer <michaelni@gmx.at> for writing initial
yading@10:  * implementation.
yading@10:  *
yading@10:  * This file is part of FFmpeg.
yading@10:  *
yading@10:  * FFmpeg is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * FFmpeg is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with FFmpeg; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: /**
yading@10:  * @file
yading@10:  * Multithreading support functions
yading@10:  * @see doc/multithreading.txt
yading@10:  */
yading@10: 
yading@10: #include "config.h"
yading@10: 
yading@10: #if HAVE_SCHED_GETAFFINITY
yading@10: #ifndef _GNU_SOURCE
yading@10: # define _GNU_SOURCE
yading@10: #endif
yading@10: #include <sched.h>
yading@10: #endif
yading@10: #if HAVE_GETPROCESSAFFINITYMASK
yading@10: #include <windows.h>
yading@10: #endif
yading@10: #if HAVE_SYSCTL
yading@10: #if HAVE_SYS_PARAM_H
yading@10: #include <sys/param.h>
yading@10: #endif
yading@10: #include <sys/types.h>
yading@10: #include <sys/param.h>
yading@10: #include <sys/sysctl.h>
yading@10: #endif
yading@10: #if HAVE_SYSCONF
yading@10: #include <unistd.h>
yading@10: #endif
yading@10: 
yading@10: #include "avcodec.h"
yading@10: #include "internal.h"
yading@10: #include "thread.h"
yading@10: #include "libavutil/avassert.h"
yading@10: #include "libavutil/common.h"
yading@10: 
yading@10: #if HAVE_PTHREADS
yading@10: #include <pthread.h>
yading@10: #elif HAVE_W32THREADS
yading@10: #include "w32pthreads.h"
yading@10: #elif HAVE_OS2THREADS
yading@10: #include "os2threads.h"
yading@10: #endif
yading@10: 
yading@10: typedef int (action_func)(AVCodecContext *c, void *arg);
yading@10: typedef int (action_func2)(AVCodecContext *c, void *arg, int jobnr, int threadnr);
yading@10: 
yading@10: typedef struct ThreadContext {
yading@10:     pthread_t *workers;
yading@10:     action_func *func;
yading@10:     action_func2 *func2;
yading@10:     void *args;
yading@10:     int *rets;
yading@10:     int rets_count;
yading@10:     int job_count;
yading@10:     int job_size;
yading@10: 
yading@10:     pthread_cond_t last_job_cond;
yading@10:     pthread_cond_t current_job_cond;
yading@10:     pthread_mutex_t current_job_lock;
yading@10:     int current_job;
yading@10:     unsigned int current_execute;
yading@10:     int done;
yading@10: } ThreadContext;
yading@10: 
yading@10: /**
yading@10:  * Context used by codec threads and stored in their AVCodecContext thread_opaque.
yading@10:  */
yading@10: typedef struct PerThreadContext {
yading@10:     struct FrameThreadContext *parent;
yading@10: 
yading@10:     pthread_t      thread;
yading@10:     int            thread_init;
yading@10:     pthread_cond_t input_cond;      ///< Used to wait for a new packet from the main thread.
yading@10:     pthread_cond_t progress_cond;   ///< Used by child threads to wait for progress to change.
yading@10:     pthread_cond_t output_cond;     ///< Used by the main thread to wait for frames to finish.
yading@10: 
yading@10:     pthread_mutex_t mutex;          ///< Mutex used to protect the contents of the PerThreadContext.
yading@10:     pthread_mutex_t progress_mutex; ///< Mutex used to protect frame progress values and progress_cond.
yading@10: 
yading@10:     AVCodecContext *avctx;          ///< Context used to decode packets passed to this thread.
yading@10: 
yading@10:     AVPacket       avpkt;           ///< Input packet (for decoding) or output (for encoding).
yading@10:     uint8_t       *buf;             ///< backup storage for packet data when the input packet is not refcounted
yading@10:     int            allocated_buf_size; ///< Size allocated for buf
yading@10: 
yading@10:     AVFrame frame;                  ///< Output frame (for decoding) or input (for encoding).
yading@10:     int     got_frame;              ///< The output of got_picture_ptr from the last avcodec_decode_video() call.
yading@10:     int     result;                 ///< The result of the last codec decode/encode() call.
yading@10: 
yading@10:     enum {
yading@10:         STATE_INPUT_READY,          ///< Set when the thread is awaiting a packet.
yading@10:         STATE_SETTING_UP,           ///< Set before the codec has called ff_thread_finish_setup().
yading@10:         STATE_GET_BUFFER,           /**<
yading@10:                                      * Set when the codec calls get_buffer().
yading@10:                                      * State is returned to STATE_SETTING_UP afterwards.
yading@10:                                      */
yading@10:         STATE_GET_FORMAT,           /**<
yading@10:                                      * Set when the codec calls get_format().
yading@10:                                      * State is returned to STATE_SETTING_UP afterwards.
yading@10:                                      */
yading@10:         STATE_SETUP_FINISHED        ///< Set after the codec has called ff_thread_finish_setup().
yading@10:     } state;
yading@10: 
yading@10:     /**
yading@10:      * Array of frames passed to ff_thread_release_buffer().
yading@10:      * Frames are released after all threads referencing them are finished.
yading@10:      */
yading@10:     AVFrame *released_buffers;
yading@10:     int  num_released_buffers;
yading@10:     int      released_buffers_allocated;
yading@10: 
yading@10:     AVFrame *requested_frame;       ///< AVFrame the codec passed to get_buffer()
yading@10:     int      requested_flags;       ///< flags passed to get_buffer() for requested_frame
yading@10: 
yading@10:     const enum AVPixelFormat *available_formats; ///< Format array for get_format()
yading@10:     enum AVPixelFormat result_format;            ///< get_format() result
yading@10: } PerThreadContext;
yading@10: 
yading@10: /**
yading@10:  * Context stored in the client AVCodecContext thread_opaque.
yading@10:  */
yading@10: typedef struct FrameThreadContext {
yading@10:     PerThreadContext *threads;     ///< The contexts for each thread.
yading@10:     PerThreadContext *prev_thread; ///< The last thread submit_packet() was called on.
yading@10: 
yading@10:     pthread_mutex_t buffer_mutex;  ///< Mutex used to protect get/release_buffer().
yading@10: 
yading@10:     int next_decoding;             ///< The next context to submit a packet to.
yading@10:     int next_finished;             ///< The next context to return output from.
yading@10: 
yading@10:     int delaying;                  /**<
yading@10:                                     * Set for the first N packets, where N is the number of threads.
yading@10:                                     * While it is set, ff_thread_en/decode_frame won't return any results.
yading@10:                                     */
yading@10: 
yading@10:     int die;                       ///< Set when threads should exit.
yading@10: } FrameThreadContext;
yading@10: 
yading@10: 
yading@10: /* H264 slice threading seems to be buggy with more than 16 threads,
yading@10:  * limit the number of threads to 16 for automatic detection */
yading@10: #define MAX_AUTO_THREADS 16
yading@10: 
yading@10: int ff_get_logical_cpus(AVCodecContext *avctx)
yading@10: {
yading@10:     int ret, nb_cpus = 1;
yading@10: #if HAVE_SCHED_GETAFFINITY && defined(CPU_COUNT)
yading@10:     cpu_set_t cpuset;
yading@10: 
yading@10:     CPU_ZERO(&cpuset);
yading@10: 
yading@10:     ret = sched_getaffinity(0, sizeof(cpuset), &cpuset);
yading@10:     if (!ret) {
yading@10:         nb_cpus = CPU_COUNT(&cpuset);
yading@10:     }
yading@10: #elif HAVE_GETPROCESSAFFINITYMASK
yading@10:     DWORD_PTR proc_aff, sys_aff;
yading@10:     ret = GetProcessAffinityMask(GetCurrentProcess(), &proc_aff, &sys_aff);
yading@10:     if (ret)
yading@10:         nb_cpus = av_popcount64(proc_aff);
yading@10: #elif HAVE_SYSCTL && defined(HW_NCPU)
yading@10:     int mib[2] = { CTL_HW, HW_NCPU };
yading@10:     size_t len = sizeof(nb_cpus);
yading@10: 
yading@10:     ret = sysctl(mib, 2, &nb_cpus, &len, NULL, 0);
yading@10:     if (ret == -1)
yading@10:         nb_cpus = 0;
yading@10: #elif HAVE_SYSCONF && defined(_SC_NPROC_ONLN)
yading@10:     nb_cpus = sysconf(_SC_NPROC_ONLN);
yading@10: #elif HAVE_SYSCONF && defined(_SC_NPROCESSORS_ONLN)
yading@10:     nb_cpus = sysconf(_SC_NPROCESSORS_ONLN);
yading@10: #endif
yading@10:     av_log(avctx, AV_LOG_DEBUG, "detected %d logical cores\n", nb_cpus);
yading@10: 
yading@10:     if  (avctx->height)
yading@10:         nb_cpus = FFMIN(nb_cpus, (avctx->height+15)/16);
yading@10: 
yading@10:     return nb_cpus;
yading@10: }
yading@10: 
yading@10: 
yading@10: static void* attribute_align_arg worker(void *v)
yading@10: {
yading@10:     AVCodecContext *avctx = v;
yading@10:     ThreadContext *c = avctx->thread_opaque;
yading@10:     int our_job = c->job_count;
yading@10:     int last_execute = 0;
yading@10:     int thread_count = avctx->thread_count;
yading@10:     int self_id;
yading@10: 
yading@10:     pthread_mutex_lock(&c->current_job_lock);
yading@10:     self_id = c->current_job++;
yading@10:     for (;;){
yading@10:         while (our_job >= c->job_count) {
yading@10:             if (c->current_job == thread_count + c->job_count)
yading@10:                 pthread_cond_signal(&c->last_job_cond);
yading@10: 
yading@10:             while (last_execute == c->current_execute && !c->done)
yading@10:                 pthread_cond_wait(&c->current_job_cond, &c->current_job_lock);
yading@10:             last_execute = c->current_execute;
yading@10:             our_job = self_id;
yading@10: 
yading@10:             if (c->done) {
yading@10:                 pthread_mutex_unlock(&c->current_job_lock);
yading@10:                 return NULL;
yading@10:             }
yading@10:         }
yading@10:         pthread_mutex_unlock(&c->current_job_lock);
yading@10: 
yading@10:         c->rets[our_job%c->rets_count] = c->func ? c->func(avctx, (char*)c->args + our_job*c->job_size):
yading@10:                                                    c->func2(avctx, c->args, our_job, self_id);
yading@10: 
yading@10:         pthread_mutex_lock(&c->current_job_lock);
yading@10:         our_job = c->current_job++;
yading@10:     }
yading@10: }
yading@10: 
yading@10: static av_always_inline void avcodec_thread_park_workers(ThreadContext *c, int thread_count)
yading@10: {
yading@10:     while (c->current_job != thread_count + c->job_count)
yading@10:         pthread_cond_wait(&c->last_job_cond, &c->current_job_lock);
yading@10:     pthread_mutex_unlock(&c->current_job_lock);
yading@10: }
yading@10: 
yading@10: static void thread_free(AVCodecContext *avctx)
yading@10: {
yading@10:     ThreadContext *c = avctx->thread_opaque;
yading@10:     int i;
yading@10: 
yading@10:     pthread_mutex_lock(&c->current_job_lock);
yading@10:     c->done = 1;
yading@10:     pthread_cond_broadcast(&c->current_job_cond);
yading@10:     pthread_mutex_unlock(&c->current_job_lock);
yading@10: 
yading@10:     for (i=0; i<avctx->thread_count; i++)
yading@10:          pthread_join(c->workers[i], NULL);
yading@10: 
yading@10:     pthread_mutex_destroy(&c->current_job_lock);
yading@10:     pthread_cond_destroy(&c->current_job_cond);
yading@10:     pthread_cond_destroy(&c->last_job_cond);
yading@10:     av_free(c->workers);
yading@10:     av_freep(&avctx->thread_opaque);
yading@10: }
yading@10: 
yading@10: static int avcodec_thread_execute(AVCodecContext *avctx, action_func* func, void *arg, int *ret, int job_count, int job_size)
yading@10: {
yading@10:     ThreadContext *c= avctx->thread_opaque;
yading@10:     int dummy_ret;
yading@10: 
yading@10:     if (!(avctx->active_thread_type&FF_THREAD_SLICE) || avctx->thread_count <= 1)
yading@10:         return avcodec_default_execute(avctx, func, arg, ret, job_count, job_size);
yading@10: 
yading@10:     if (job_count <= 0)
yading@10:         return 0;
yading@10: 
yading@10:     pthread_mutex_lock(&c->current_job_lock);
yading@10: 
yading@10:     c->current_job = avctx->thread_count;
yading@10:     c->job_count = job_count;
yading@10:     c->job_size = job_size;
yading@10:     c->args = arg;
yading@10:     c->func = func;
yading@10:     if (ret) {
yading@10:         c->rets = ret;
yading@10:         c->rets_count = job_count;
yading@10:     } else {
yading@10:         c->rets = &dummy_ret;
yading@10:         c->rets_count = 1;
yading@10:     }
yading@10:     c->current_execute++;
yading@10:     pthread_cond_broadcast(&c->current_job_cond);
yading@10: 
yading@10:     avcodec_thread_park_workers(c, avctx->thread_count);
yading@10: 
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: static int avcodec_thread_execute2(AVCodecContext *avctx, action_func2* func2, void *arg, int *ret, int job_count)
yading@10: {
yading@10:     ThreadContext *c= avctx->thread_opaque;
yading@10:     c->func2 = func2;
yading@10:     return avcodec_thread_execute(avctx, NULL, arg, ret, job_count, 0);
yading@10: }
yading@10: 
yading@10: static int thread_init(AVCodecContext *avctx)
yading@10: {
yading@10:     int i;
yading@10:     ThreadContext *c;
yading@10:     int thread_count = avctx->thread_count;
yading@10: 
yading@10:     if (!thread_count) {
yading@10:         int nb_cpus = ff_get_logical_cpus(avctx);
yading@10:         // use number of cores + 1 as thread count if there is more than one
yading@10:         if (nb_cpus > 1)
yading@10:             thread_count = avctx->thread_count = FFMIN(nb_cpus + 1, MAX_AUTO_THREADS);
yading@10:         else
yading@10:             thread_count = avctx->thread_count = 1;
yading@10:     }
yading@10: 
yading@10:     if (thread_count <= 1) {
yading@10:         avctx->active_thread_type = 0;
yading@10:         return 0;
yading@10:     }
yading@10: 
yading@10:     c = av_mallocz(sizeof(ThreadContext));
yading@10:     if (!c)
yading@10:         return -1;
yading@10: 
yading@10:     c->workers = av_mallocz(sizeof(pthread_t)*thread_count);
yading@10:     if (!c->workers) {
yading@10:         av_free(c);
yading@10:         return -1;
yading@10:     }
yading@10: 
yading@10:     avctx->thread_opaque = c;
yading@10:     c->current_job = 0;
yading@10:     c->job_count = 0;
yading@10:     c->job_size = 0;
yading@10:     c->done = 0;
yading@10:     pthread_cond_init(&c->current_job_cond, NULL);
yading@10:     pthread_cond_init(&c->last_job_cond, NULL);
yading@10:     pthread_mutex_init(&c->current_job_lock, NULL);
yading@10:     pthread_mutex_lock(&c->current_job_lock);
yading@10:     for (i=0; i<thread_count; i++) {
yading@10:         if(pthread_create(&c->workers[i], NULL, worker, avctx)) {
yading@10:            avctx->thread_count = i;
yading@10:            pthread_mutex_unlock(&c->current_job_lock);
yading@10:            ff_thread_free(avctx);
yading@10:            return -1;
yading@10:         }
yading@10:     }
yading@10: 
yading@10:     avcodec_thread_park_workers(c, thread_count);
yading@10: 
yading@10:     avctx->execute = avcodec_thread_execute;
yading@10:     avctx->execute2 = avcodec_thread_execute2;
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: /**
yading@10:  * Codec worker thread.
yading@10:  *
yading@10:  * Automatically calls ff_thread_finish_setup() if the codec does
yading@10:  * not provide an update_thread_context method, or if the codec returns
yading@10:  * before calling it.
yading@10:  */
yading@10: static attribute_align_arg void *frame_worker_thread(void *arg)
yading@10: {
yading@10:     PerThreadContext *p = arg;
yading@10:     FrameThreadContext *fctx = p->parent;
yading@10:     AVCodecContext *avctx = p->avctx;
yading@10:     const AVCodec *codec = avctx->codec;
yading@10: 
yading@10:     pthread_mutex_lock(&p->mutex);
yading@10:     while (1) {
yading@10:             while (p->state == STATE_INPUT_READY && !fctx->die)
yading@10:                 pthread_cond_wait(&p->input_cond, &p->mutex);
yading@10: 
yading@10:         if (fctx->die) break;
yading@10: 
yading@10:         if (!codec->update_thread_context && (avctx->thread_safe_callbacks || (
yading@10: #if FF_API_GET_BUFFER
yading@10:             !avctx->get_buffer &&
yading@10: #endif
yading@10:             avctx->get_buffer2 == avcodec_default_get_buffer2)))
yading@10:             ff_thread_finish_setup(avctx);
yading@10: 
yading@10:         avcodec_get_frame_defaults(&p->frame);
yading@10:         p->got_frame = 0;
yading@10:         p->result = codec->decode(avctx, &p->frame, &p->got_frame, &p->avpkt);
yading@10: 
yading@10:         /* many decoders assign whole AVFrames, thus overwriting extended_data;
yading@10:          * make sure it's set correctly */
yading@10:         p->frame.extended_data = p->frame.data;
yading@10: 
yading@10:         if (p->state == STATE_SETTING_UP) ff_thread_finish_setup(avctx);
yading@10: 
yading@10:         pthread_mutex_lock(&p->progress_mutex);
yading@10: #if 0 //BUFREF-FIXME
yading@10:         for (i = 0; i < MAX_BUFFERS; i++)
yading@10:             if (p->progress_used[i] && (p->got_frame || p->result<0 || avctx->codec_id != AV_CODEC_ID_H264)) {
yading@10:                 p->progress[i][0] = INT_MAX;
yading@10:                 p->progress[i][1] = INT_MAX;
yading@10:             }
yading@10: #endif
yading@10:         p->state = STATE_INPUT_READY;
yading@10: 
yading@10:         pthread_cond_broadcast(&p->progress_cond);
yading@10:         pthread_cond_signal(&p->output_cond);
yading@10:         pthread_mutex_unlock(&p->progress_mutex);
yading@10:     }
yading@10:     pthread_mutex_unlock(&p->mutex);
yading@10: 
yading@10:     return NULL;
yading@10: }
yading@10: 
yading@10: /**
yading@10:  * Update the next thread's AVCodecContext with values from the reference thread's context.
yading@10:  *
yading@10:  * @param dst The destination context.
yading@10:  * @param src The source context.
yading@10:  * @param for_user 0 if the destination is a codec thread, 1 if the destination is the user's thread
yading@10:  */
yading@10: static int update_context_from_thread(AVCodecContext *dst, AVCodecContext *src, int for_user)
yading@10: {
yading@10:     int err = 0;
yading@10: 
yading@10:     if (dst != src) {
yading@10:         dst->time_base = src->time_base;
yading@10:         dst->width     = src->width;
yading@10:         dst->height    = src->height;
yading@10:         dst->pix_fmt   = src->pix_fmt;
yading@10: 
yading@10:         dst->coded_width  = src->coded_width;
yading@10:         dst->coded_height = src->coded_height;
yading@10: 
yading@10:         dst->has_b_frames = src->has_b_frames;
yading@10:         dst->idct_algo    = src->idct_algo;
yading@10: 
yading@10:         dst->bits_per_coded_sample = src->bits_per_coded_sample;
yading@10:         dst->sample_aspect_ratio   = src->sample_aspect_ratio;
yading@10:         dst->dtg_active_format     = src->dtg_active_format;
yading@10: 
yading@10:         dst->profile = src->profile;
yading@10:         dst->level   = src->level;
yading@10: 
yading@10:         dst->bits_per_raw_sample = src->bits_per_raw_sample;
yading@10:         dst->ticks_per_frame     = src->ticks_per_frame;
yading@10:         dst->color_primaries     = src->color_primaries;
yading@10: 
yading@10:         dst->color_trc   = src->color_trc;
yading@10:         dst->colorspace  = src->colorspace;
yading@10:         dst->color_range = src->color_range;
yading@10:         dst->chroma_sample_location = src->chroma_sample_location;
yading@10: 
yading@10:         dst->hwaccel = src->hwaccel;
yading@10:         dst->hwaccel_context = src->hwaccel_context;
yading@10:     }
yading@10: 
yading@10:     if (for_user) {
yading@10:         dst->delay       = src->thread_count - 1;
yading@10:         dst->coded_frame = src->coded_frame;
yading@10:     } else {
yading@10:         if (dst->codec->update_thread_context)
yading@10:             err = dst->codec->update_thread_context(dst, src);
yading@10:     }
yading@10: 
yading@10:     return err;
yading@10: }
yading@10: 
yading@10: /**
yading@10:  * Update the next thread's AVCodecContext with values set by the user.
yading@10:  *
yading@10:  * @param dst The destination context.
yading@10:  * @param src The source context.
yading@10:  * @return 0 on success, negative error code on failure
yading@10:  */
yading@10: static int update_context_from_user(AVCodecContext *dst, AVCodecContext *src)
yading@10: {
yading@10: #define copy_fields(s, e) memcpy(&dst->s, &src->s, (char*)&dst->e - (char*)&dst->s);
yading@10:     dst->flags          = src->flags;
yading@10: 
yading@10:     dst->draw_horiz_band= src->draw_horiz_band;
yading@10:     dst->get_buffer2    = src->get_buffer2;
yading@10: #if FF_API_GET_BUFFER
yading@10:     dst->get_buffer     = src->get_buffer;
yading@10:     dst->release_buffer = src->release_buffer;
yading@10: #endif
yading@10: 
yading@10:     dst->opaque   = src->opaque;
yading@10:     dst->debug    = src->debug;
yading@10:     dst->debug_mv = src->debug_mv;
yading@10: 
yading@10:     dst->slice_flags = src->slice_flags;
yading@10:     dst->flags2      = src->flags2;
yading@10: 
yading@10:     copy_fields(skip_loop_filter, subtitle_header);
yading@10: 
yading@10:     dst->frame_number     = src->frame_number;
yading@10:     dst->reordered_opaque = src->reordered_opaque;
yading@10:     dst->thread_safe_callbacks = src->thread_safe_callbacks;
yading@10: 
yading@10:     if (src->slice_count && src->slice_offset) {
yading@10:         if (dst->slice_count < src->slice_count) {
yading@10:             int *tmp = av_realloc(dst->slice_offset, src->slice_count *
yading@10:                                   sizeof(*dst->slice_offset));
yading@10:             if (!tmp) {
yading@10:                 av_free(dst->slice_offset);
yading@10:                 return AVERROR(ENOMEM);
yading@10:             }
yading@10:             dst->slice_offset = tmp;
yading@10:         }
yading@10:         memcpy(dst->slice_offset, src->slice_offset,
yading@10:                src->slice_count * sizeof(*dst->slice_offset));
yading@10:     }
yading@10:     dst->slice_count = src->slice_count;
yading@10:     return 0;
yading@10: #undef copy_fields
yading@10: }
yading@10: 
yading@10: /// Releases the buffers that this decoding thread was the last user of.
yading@10: static void release_delayed_buffers(PerThreadContext *p)
yading@10: {
yading@10:     FrameThreadContext *fctx = p->parent;
yading@10: 
yading@10:     while (p->num_released_buffers > 0) {
yading@10:         AVFrame *f;
yading@10: 
yading@10:         pthread_mutex_lock(&fctx->buffer_mutex);
yading@10: 
yading@10:         // fix extended data in case the caller screwed it up
yading@10:         av_assert0(p->avctx->codec_type == AVMEDIA_TYPE_VIDEO);
yading@10:         f = &p->released_buffers[--p->num_released_buffers];
yading@10:         f->extended_data = f->data;
yading@10:         av_frame_unref(f);
yading@10: 
yading@10:         pthread_mutex_unlock(&fctx->buffer_mutex);
yading@10:     }
yading@10: }
yading@10: 
yading@10: static int submit_packet(PerThreadContext *p, AVPacket *avpkt)
yading@10: {
yading@10:     FrameThreadContext *fctx = p->parent;
yading@10:     PerThreadContext *prev_thread = fctx->prev_thread;
yading@10:     const AVCodec *codec = p->avctx->codec;
yading@10: 
yading@10:     if (!avpkt->size && !(codec->capabilities & CODEC_CAP_DELAY)) return 0;
yading@10: 
yading@10:     pthread_mutex_lock(&p->mutex);
yading@10: 
yading@10:     release_delayed_buffers(p);
yading@10: 
yading@10:     if (prev_thread) {
yading@10:         int err;
yading@10:         if (prev_thread->state == STATE_SETTING_UP) {
yading@10:             pthread_mutex_lock(&prev_thread->progress_mutex);
yading@10:             while (prev_thread->state == STATE_SETTING_UP)
yading@10:                 pthread_cond_wait(&prev_thread->progress_cond, &prev_thread->progress_mutex);
yading@10:             pthread_mutex_unlock(&prev_thread->progress_mutex);
yading@10:         }
yading@10: 
yading@10:         err = update_context_from_thread(p->avctx, prev_thread->avctx, 0);
yading@10:         if (err) {
yading@10:             pthread_mutex_unlock(&p->mutex);
yading@10:             return err;
yading@10:         }
yading@10:     }
yading@10: 
yading@10:     av_buffer_unref(&p->avpkt.buf);
yading@10:     p->avpkt = *avpkt;
yading@10:     if (avpkt->buf)
yading@10:         p->avpkt.buf = av_buffer_ref(avpkt->buf);
yading@10:     else {
yading@10:         av_fast_malloc(&p->buf, &p->allocated_buf_size, avpkt->size + FF_INPUT_BUFFER_PADDING_SIZE);
yading@10:         p->avpkt.data = p->buf;
yading@10:         memcpy(p->buf, avpkt->data, avpkt->size);
yading@10:         memset(p->buf + avpkt->size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
yading@10:     }
yading@10: 
yading@10:     p->state = STATE_SETTING_UP;
yading@10:     pthread_cond_signal(&p->input_cond);
yading@10:     pthread_mutex_unlock(&p->mutex);
yading@10: 
yading@10:     /*
yading@10:      * If the client doesn't have a thread-safe get_buffer(),
yading@10:      * then decoding threads call back to the main thread,
yading@10:      * and it calls back to the client here.
yading@10:      */
yading@10: 
yading@10:     if (!p->avctx->thread_safe_callbacks && (
yading@10:          p->avctx->get_format != avcodec_default_get_format ||
yading@10: #if FF_API_GET_BUFFER
yading@10:          p->avctx->get_buffer ||
yading@10: #endif
yading@10:          p->avctx->get_buffer2 != avcodec_default_get_buffer2)) {
yading@10:         while (p->state != STATE_SETUP_FINISHED && p->state != STATE_INPUT_READY) {
yading@10:             int call_done = 1;
yading@10:             pthread_mutex_lock(&p->progress_mutex);
yading@10:             while (p->state == STATE_SETTING_UP)
yading@10:                 pthread_cond_wait(&p->progress_cond, &p->progress_mutex);
yading@10: 
yading@10:             switch (p->state) {
yading@10:             case STATE_GET_BUFFER:
yading@10:                 p->result = ff_get_buffer(p->avctx, p->requested_frame, p->requested_flags);
yading@10:                 break;
yading@10:             case STATE_GET_FORMAT:
yading@10:                 p->result_format = p->avctx->get_format(p->avctx, p->available_formats);
yading@10:                 break;
yading@10:             default:
yading@10:                 call_done = 0;
yading@10:                 break;
yading@10:             }
yading@10:             if (call_done) {
yading@10:                 p->state  = STATE_SETTING_UP;
yading@10:                 pthread_cond_signal(&p->progress_cond);
yading@10:             }
yading@10:             pthread_mutex_unlock(&p->progress_mutex);
yading@10:         }
yading@10:     }
yading@10: 
yading@10:     fctx->prev_thread = p;
yading@10:     fctx->next_decoding++;
yading@10: 
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: int ff_thread_decode_frame(AVCodecContext *avctx,
yading@10:                            AVFrame *picture, int *got_picture_ptr,
yading@10:                            AVPacket *avpkt)
yading@10: {
yading@10:     FrameThreadContext *fctx = avctx->thread_opaque;
yading@10:     int finished = fctx->next_finished;
yading@10:     PerThreadContext *p;
yading@10:     int err;
yading@10: 
yading@10:     /*
yading@10:      * Submit a packet to the next decoding thread.
yading@10:      */
yading@10: 
yading@10:     p = &fctx->threads[fctx->next_decoding];
yading@10:     err = update_context_from_user(p->avctx, avctx);
yading@10:     if (err) return err;
yading@10:     err = submit_packet(p, avpkt);
yading@10:     if (err) return err;
yading@10: 
yading@10:     /*
yading@10:      * If we're still receiving the initial packets, don't return a frame.
yading@10:      */
yading@10: 
yading@10:     if (fctx->delaying) {
yading@10:         if (fctx->next_decoding >= (avctx->thread_count-1)) fctx->delaying = 0;
yading@10: 
yading@10:         *got_picture_ptr=0;
yading@10:         if (avpkt->size)
yading@10:             return avpkt->size;
yading@10:     }
yading@10: 
yading@10:     /*
yading@10:      * Return the next available frame from the oldest thread.
yading@10:      * If we're at the end of the stream, then we have to skip threads that
yading@10:      * didn't output a frame, because we don't want to accidentally signal
yading@10:      * EOF (avpkt->size == 0 && *got_picture_ptr == 0).
yading@10:      */
yading@10: 
yading@10:     do {
yading@10:         p = &fctx->threads[finished++];
yading@10: 
yading@10:         if (p->state != STATE_INPUT_READY) {
yading@10:             pthread_mutex_lock(&p->progress_mutex);
yading@10:             while (p->state != STATE_INPUT_READY)
yading@10:                 pthread_cond_wait(&p->output_cond, &p->progress_mutex);
yading@10:             pthread_mutex_unlock(&p->progress_mutex);
yading@10:         }
yading@10: 
yading@10:         av_frame_move_ref(picture, &p->frame);
yading@10:         *got_picture_ptr = p->got_frame;
yading@10:         picture->pkt_dts = p->avpkt.dts;
yading@10: 
yading@10:         /*
yading@10:          * A later call with avkpt->size == 0 may loop over all threads,
yading@10:          * including this one, searching for a frame to return before being
yading@10:          * stopped by the "finished != fctx->next_finished" condition.
yading@10:          * Make sure we don't mistakenly return the same frame again.
yading@10:          */
yading@10:         p->got_frame = 0;
yading@10: 
yading@10:         if (finished >= avctx->thread_count) finished = 0;
yading@10:     } while (!avpkt->size && !*got_picture_ptr && finished != fctx->next_finished);
yading@10: 
yading@10:     update_context_from_thread(avctx, p->avctx, 1);
yading@10: 
yading@10:     if (fctx->next_decoding >= avctx->thread_count) fctx->next_decoding = 0;
yading@10: 
yading@10:     fctx->next_finished = finished;
yading@10: 
yading@10:     /* return the size of the consumed packet if no error occurred */
yading@10:     return (p->result >= 0) ? avpkt->size : p->result;
yading@10: }
yading@10: 
yading@10: void ff_thread_report_progress(ThreadFrame *f, int n, int field)
yading@10: {
yading@10:     PerThreadContext *p;
yading@10:     volatile int *progress = f->progress ? (int*)f->progress->data : NULL;
yading@10: 
yading@10:     if (!progress || progress[field] >= n) return;
yading@10: 
yading@10:     p = f->owner->thread_opaque;
yading@10: 
yading@10:     if (f->owner->debug&FF_DEBUG_THREADS)
yading@10:         av_log(f->owner, AV_LOG_DEBUG, "%p finished %d field %d\n", progress, n, field);
yading@10: 
yading@10:     pthread_mutex_lock(&p->progress_mutex);
yading@10:     progress[field] = n;
yading@10:     pthread_cond_broadcast(&p->progress_cond);
yading@10:     pthread_mutex_unlock(&p->progress_mutex);
yading@10: }
yading@10: 
yading@10: void ff_thread_await_progress(ThreadFrame *f, int n, int field)
yading@10: {
yading@10:     PerThreadContext *p;
yading@10:     volatile int *progress = f->progress ? (int*)f->progress->data : NULL;
yading@10: 
yading@10:     if (!progress || progress[field] >= n) return;
yading@10: 
yading@10:     p = f->owner->thread_opaque;
yading@10: 
yading@10:     if (f->owner->debug&FF_DEBUG_THREADS)
yading@10:         av_log(f->owner, AV_LOG_DEBUG, "thread awaiting %d field %d from %p\n", n, field, progress);
yading@10: 
yading@10:     pthread_mutex_lock(&p->progress_mutex);
yading@10:     while (progress[field] < n)
yading@10:         pthread_cond_wait(&p->progress_cond, &p->progress_mutex);
yading@10:     pthread_mutex_unlock(&p->progress_mutex);
yading@10: }
yading@10: 
yading@10: void ff_thread_finish_setup(AVCodecContext *avctx) {
yading@10:     PerThreadContext *p = avctx->thread_opaque;
yading@10: 
yading@10:     if (!(avctx->active_thread_type&FF_THREAD_FRAME)) return;
yading@10: 
yading@10:     if(p->state == STATE_SETUP_FINISHED){
yading@10:         av_log(avctx, AV_LOG_WARNING, "Multiple ff_thread_finish_setup() calls\n");
yading@10:     }
yading@10: 
yading@10:     pthread_mutex_lock(&p->progress_mutex);
yading@10:     p->state = STATE_SETUP_FINISHED;
yading@10:     pthread_cond_broadcast(&p->progress_cond);
yading@10:     pthread_mutex_unlock(&p->progress_mutex);
yading@10: }
yading@10: 
yading@10: /// Waits for all threads to finish.
yading@10: static void park_frame_worker_threads(FrameThreadContext *fctx, int thread_count)
yading@10: {
yading@10:     int i;
yading@10: 
yading@10:     for (i = 0; i < thread_count; i++) {
yading@10:         PerThreadContext *p = &fctx->threads[i];
yading@10: 
yading@10:         if (p->state != STATE_INPUT_READY) {
yading@10:             pthread_mutex_lock(&p->progress_mutex);
yading@10:             while (p->state != STATE_INPUT_READY)
yading@10:                 pthread_cond_wait(&p->output_cond, &p->progress_mutex);
yading@10:             pthread_mutex_unlock(&p->progress_mutex);
yading@10:         }
yading@10:         p->got_frame = 0;
yading@10:     }
yading@10: }
yading@10: 
yading@10: static void frame_thread_free(AVCodecContext *avctx, int thread_count)
yading@10: {
yading@10:     FrameThreadContext *fctx = avctx->thread_opaque;
yading@10:     const AVCodec *codec = avctx->codec;
yading@10:     int i;
yading@10: 
yading@10:     park_frame_worker_threads(fctx, thread_count);
yading@10: 
yading@10:     if (fctx->prev_thread && fctx->prev_thread != fctx->threads)
yading@10:         if (update_context_from_thread(fctx->threads->avctx, fctx->prev_thread->avctx, 0) < 0) {
yading@10:             av_log(avctx, AV_LOG_ERROR, "Final thread update failed\n");
yading@10:             fctx->prev_thread->avctx->internal->is_copy = fctx->threads->avctx->internal->is_copy;
yading@10:             fctx->threads->avctx->internal->is_copy = 1;
yading@10:         }
yading@10: 
yading@10:     fctx->die = 1;
yading@10: 
yading@10:     for (i = 0; i < thread_count; i++) {
yading@10:         PerThreadContext *p = &fctx->threads[i];
yading@10: 
yading@10:         pthread_mutex_lock(&p->mutex);
yading@10:         pthread_cond_signal(&p->input_cond);
yading@10:         pthread_mutex_unlock(&p->mutex);
yading@10: 
yading@10:         if (p->thread_init)
yading@10:             pthread_join(p->thread, NULL);
yading@10:         p->thread_init=0;
yading@10: 
yading@10:         if (codec->close)
yading@10:             codec->close(p->avctx);
yading@10: 
yading@10:         avctx->codec = NULL;
yading@10: 
yading@10:         release_delayed_buffers(p);
yading@10:         av_frame_unref(&p->frame);
yading@10:     }
yading@10: 
yading@10:     for (i = 0; i < thread_count; i++) {
yading@10:         PerThreadContext *p = &fctx->threads[i];
yading@10: 
yading@10:         pthread_mutex_destroy(&p->mutex);
yading@10:         pthread_mutex_destroy(&p->progress_mutex);
yading@10:         pthread_cond_destroy(&p->input_cond);
yading@10:         pthread_cond_destroy(&p->progress_cond);
yading@10:         pthread_cond_destroy(&p->output_cond);
yading@10:         av_buffer_unref(&p->avpkt.buf);
yading@10:         av_freep(&p->buf);
yading@10:         av_freep(&p->released_buffers);
yading@10: 
yading@10:         if (i) {
yading@10:             av_freep(&p->avctx->priv_data);
yading@10:             av_freep(&p->avctx->internal);
yading@10:             av_freep(&p->avctx->slice_offset);
yading@10:         }
yading@10: 
yading@10:         av_freep(&p->avctx);
yading@10:     }
yading@10: 
yading@10:     av_freep(&fctx->threads);
yading@10:     pthread_mutex_destroy(&fctx->buffer_mutex);
yading@10:     av_freep(&avctx->thread_opaque);
yading@10: }
yading@10: 
yading@10: static int frame_thread_init(AVCodecContext *avctx)
yading@10: {
yading@10:     int thread_count = avctx->thread_count;
yading@10:     const AVCodec *codec = avctx->codec;
yading@10:     AVCodecContext *src = avctx;
yading@10:     FrameThreadContext *fctx;
yading@10:     int i, err = 0;
yading@10: 
yading@10:     if (!thread_count) {
yading@10:         int nb_cpus = ff_get_logical_cpus(avctx);
yading@10:         if ((avctx->debug & (FF_DEBUG_VIS_QP | FF_DEBUG_VIS_MB_TYPE)) || avctx->debug_mv)
yading@10:             nb_cpus = 1;
yading@10:         // use number of cores + 1 as thread count if there is more than one
yading@10:         if (nb_cpus > 1)
yading@10:             thread_count = avctx->thread_count = FFMIN(nb_cpus + 1, MAX_AUTO_THREADS);
yading@10:         else
yading@10:             thread_count = avctx->thread_count = 1;
yading@10:     }
yading@10: 
yading@10:     if (thread_count <= 1) {
yading@10:         avctx->active_thread_type = 0;
yading@10:         return 0;
yading@10:     }
yading@10: 
yading@10:     avctx->thread_opaque = fctx = av_mallocz(sizeof(FrameThreadContext));
yading@10: 
yading@10:     fctx->threads = av_mallocz(sizeof(PerThreadContext) * thread_count);
yading@10:     pthread_mutex_init(&fctx->buffer_mutex, NULL);
yading@10:     fctx->delaying = 1;
yading@10: 
yading@10:     for (i = 0; i < thread_count; i++) {
yading@10:         AVCodecContext *copy = av_malloc(sizeof(AVCodecContext));
yading@10:         PerThreadContext *p  = &fctx->threads[i];
yading@10: 
yading@10:         pthread_mutex_init(&p->mutex, NULL);
yading@10:         pthread_mutex_init(&p->progress_mutex, NULL);
yading@10:         pthread_cond_init(&p->input_cond, NULL);
yading@10:         pthread_cond_init(&p->progress_cond, NULL);
yading@10:         pthread_cond_init(&p->output_cond, NULL);
yading@10: 
yading@10:         p->parent = fctx;
yading@10:         p->avctx  = copy;
yading@10: 
yading@10:         if (!copy) {
yading@10:             err = AVERROR(ENOMEM);
yading@10:             goto error;
yading@10:         }
yading@10: 
yading@10:         *copy = *src;
yading@10:         copy->thread_opaque = p;
yading@10:         copy->pkt = &p->avpkt;
yading@10: 
yading@10:         if (!i) {
yading@10:             src = copy;
yading@10: 
yading@10:             if (codec->init)
yading@10:                 err = codec->init(copy);
yading@10: 
yading@10:             update_context_from_thread(avctx, copy, 1);
yading@10:         } else {
yading@10:             copy->priv_data = av_malloc(codec->priv_data_size);
yading@10:             if (!copy->priv_data) {
yading@10:                 err = AVERROR(ENOMEM);
yading@10:                 goto error;
yading@10:             }
yading@10:             memcpy(copy->priv_data, src->priv_data, codec->priv_data_size);
yading@10:             copy->internal = av_malloc(sizeof(AVCodecInternal));
yading@10:             if (!copy->internal) {
yading@10:                 err = AVERROR(ENOMEM);
yading@10:                 goto error;
yading@10:             }
yading@10:             *copy->internal = *src->internal;
yading@10:             copy->internal->is_copy = 1;
yading@10: 
yading@10:             if (codec->init_thread_copy)
yading@10:                 err = codec->init_thread_copy(copy);
yading@10:         }
yading@10: 
yading@10:         if (err) goto error;
yading@10: 
yading@10:         err = AVERROR(pthread_create(&p->thread, NULL, frame_worker_thread, p));
yading@10:         p->thread_init= !err;
yading@10:         if(!p->thread_init)
yading@10:             goto error;
yading@10:     }
yading@10: 
yading@10:     return 0;
yading@10: 
yading@10: error:
yading@10:     frame_thread_free(avctx, i+1);
yading@10: 
yading@10:     return err;
yading@10: }
yading@10: 
yading@10: void ff_thread_flush(AVCodecContext *avctx)
yading@10: {
yading@10:     int i;
yading@10:     FrameThreadContext *fctx = avctx->thread_opaque;
yading@10: 
yading@10:     if (!avctx->thread_opaque) return;
yading@10: 
yading@10:     park_frame_worker_threads(fctx, avctx->thread_count);
yading@10:     if (fctx->prev_thread) {
yading@10:         if (fctx->prev_thread != &fctx->threads[0])
yading@10:             update_context_from_thread(fctx->threads[0].avctx, fctx->prev_thread->avctx, 0);
yading@10:         if (avctx->codec->flush)
yading@10:             avctx->codec->flush(fctx->threads[0].avctx);
yading@10:     }
yading@10: 
yading@10:     fctx->next_decoding = fctx->next_finished = 0;
yading@10:     fctx->delaying = 1;
yading@10:     fctx->prev_thread = NULL;
yading@10:     for (i = 0; i < avctx->thread_count; i++) {
yading@10:         PerThreadContext *p = &fctx->threads[i];
yading@10:         // Make sure decode flush calls with size=0 won't return old frames
yading@10:         p->got_frame = 0;
yading@10:         av_frame_unref(&p->frame);
yading@10: 
yading@10:         release_delayed_buffers(p);
yading@10:     }
yading@10: }
yading@10: 
yading@10: int ff_thread_can_start_frame(AVCodecContext *avctx)
yading@10: {
yading@10:     PerThreadContext *p = avctx->thread_opaque;
yading@10:     if ((avctx->active_thread_type&FF_THREAD_FRAME) && p->state != STATE_SETTING_UP &&
yading@10:         (avctx->codec->update_thread_context || (!avctx->thread_safe_callbacks && (
yading@10: #if FF_API_GET_BUFFER
yading@10:                 avctx->get_buffer ||
yading@10: #endif
yading@10:                 avctx->get_buffer2 != avcodec_default_get_buffer2)))) {
yading@10:         return 0;
yading@10:     }
yading@10:     return 1;
yading@10: }
yading@10: 
yading@10: static int thread_get_buffer_internal(AVCodecContext *avctx, ThreadFrame *f, int flags)
yading@10: {
yading@10:     PerThreadContext *p = avctx->thread_opaque;
yading@10:     int err;
yading@10: 
yading@10:     f->owner = avctx;
yading@10: 
yading@10:     ff_init_buffer_info(avctx, f->f);
yading@10: 
yading@10:     if (!(avctx->active_thread_type & FF_THREAD_FRAME))
yading@10:         return ff_get_buffer(avctx, f->f, flags);
yading@10: 
yading@10:     if (p->state != STATE_SETTING_UP &&
yading@10:         (avctx->codec->update_thread_context || (!avctx->thread_safe_callbacks && (
yading@10: #if FF_API_GET_BUFFER
yading@10:                 avctx->get_buffer ||
yading@10: #endif
yading@10:                 avctx->get_buffer2 != avcodec_default_get_buffer2)))) {
yading@10:         av_log(avctx, AV_LOG_ERROR, "get_buffer() cannot be called after ff_thread_finish_setup()\n");
yading@10:         return -1;
yading@10:     }
yading@10: 
yading@10:     if (avctx->internal->allocate_progress) {
yading@10:         int *progress;
yading@10:         f->progress = av_buffer_alloc(2 * sizeof(int));
yading@10:         if (!f->progress) {
yading@10:             return AVERROR(ENOMEM);
yading@10:         }
yading@10:         progress = (int*)f->progress->data;
yading@10: 
yading@10:         progress[0] = progress[1] = -1;
yading@10:     }
yading@10: 
yading@10:     pthread_mutex_lock(&p->parent->buffer_mutex);
yading@10: 
yading@10:     if (avctx->thread_safe_callbacks || (
yading@10: #if FF_API_GET_BUFFER
yading@10:         !avctx->get_buffer &&
yading@10: #endif
yading@10:         avctx->get_buffer2 == avcodec_default_get_buffer2)) {
yading@10:         err = ff_get_buffer(avctx, f->f, flags);
yading@10:     } else {
yading@10:         pthread_mutex_lock(&p->progress_mutex);
yading@10:         p->requested_frame = f->f;
yading@10:         p->requested_flags = flags;
yading@10:         p->state = STATE_GET_BUFFER;
yading@10:         pthread_cond_broadcast(&p->progress_cond);
yading@10: 
yading@10:         while (p->state != STATE_SETTING_UP)
yading@10:             pthread_cond_wait(&p->progress_cond, &p->progress_mutex);
yading@10: 
yading@10:         err = p->result;
yading@10: 
yading@10:         pthread_mutex_unlock(&p->progress_mutex);
yading@10: 
yading@10:         if (!avctx->codec->update_thread_context)
yading@10:             ff_thread_finish_setup(avctx);
yading@10:     }
yading@10: 
yading@10:     if (err)
yading@10:         av_buffer_unref(&f->progress);
yading@10: 
yading@10:     pthread_mutex_unlock(&p->parent->buffer_mutex);
yading@10: 
yading@10:     return err;
yading@10: }
yading@10: 
yading@10: enum AVPixelFormat ff_thread_get_format(AVCodecContext *avctx, const enum AVPixelFormat *fmt)
yading@10: {
yading@10:     enum AVPixelFormat res;
yading@10:     PerThreadContext *p = avctx->thread_opaque;
yading@10:     if (!(avctx->active_thread_type & FF_THREAD_FRAME) || avctx->thread_safe_callbacks ||
yading@10:         avctx->get_format == avcodec_default_get_format)
yading@10:         return avctx->get_format(avctx, fmt);
yading@10:     if (p->state != STATE_SETTING_UP) {
yading@10:         av_log(avctx, AV_LOG_ERROR, "get_format() cannot be called after ff_thread_finish_setup()\n");
yading@10:         return -1;
yading@10:     }
yading@10:     pthread_mutex_lock(&p->progress_mutex);
yading@10:     p->available_formats = fmt;
yading@10:     p->state = STATE_GET_FORMAT;
yading@10:     pthread_cond_broadcast(&p->progress_cond);
yading@10: 
yading@10:     while (p->state != STATE_SETTING_UP)
yading@10:         pthread_cond_wait(&p->progress_cond, &p->progress_mutex);
yading@10: 
yading@10:     res = p->result_format;
yading@10: 
yading@10:     pthread_mutex_unlock(&p->progress_mutex);
yading@10: 
yading@10:     return res;
yading@10: }
yading@10: 
yading@10: int ff_thread_get_buffer(AVCodecContext *avctx, ThreadFrame *f, int flags)
yading@10: {
yading@10:     int ret = thread_get_buffer_internal(avctx, f, flags);
yading@10:     if (ret < 0)
yading@10:         av_log(avctx, AV_LOG_ERROR, "thread_get_buffer() failed\n");
yading@10:     return ret;
yading@10: }
yading@10: 
yading@10: void ff_thread_release_buffer(AVCodecContext *avctx, ThreadFrame *f)
yading@10: {
yading@10:     PerThreadContext *p = avctx->thread_opaque;
yading@10:     FrameThreadContext *fctx;
yading@10:     AVFrame *dst, *tmp;
yading@10:     int can_direct_free = !(avctx->active_thread_type & FF_THREAD_FRAME) ||
yading@10:                           avctx->thread_safe_callbacks                   ||
yading@10:                           (
yading@10: #if FF_API_GET_BUFFER
yading@10:                            !avctx->get_buffer &&
yading@10: #endif
yading@10:                            avctx->get_buffer2 == avcodec_default_get_buffer2);
yading@10: 
yading@10:     if (!f->f->data[0])
yading@10:         return;
yading@10: 
yading@10:     if (avctx->debug & FF_DEBUG_BUFFERS)
yading@10:         av_log(avctx, AV_LOG_DEBUG, "thread_release_buffer called on pic %p\n", f);
yading@10: 
yading@10:     av_buffer_unref(&f->progress);
yading@10:     f->owner    = NULL;
yading@10: 
yading@10:     if (can_direct_free) {
yading@10:         av_frame_unref(f->f);
yading@10:         return;
yading@10:     }
yading@10: 
yading@10:     fctx = p->parent;
yading@10:     pthread_mutex_lock(&fctx->buffer_mutex);
yading@10: 
yading@10:     if (p->num_released_buffers + 1 >= INT_MAX / sizeof(*p->released_buffers))
yading@10:         goto fail;
yading@10:     tmp = av_fast_realloc(p->released_buffers, &p->released_buffers_allocated,
yading@10:                           (p->num_released_buffers + 1) *
yading@10:                           sizeof(*p->released_buffers));
yading@10:     if (!tmp)
yading@10:         goto fail;
yading@10:     p->released_buffers = tmp;
yading@10: 
yading@10:     dst = &p->released_buffers[p->num_released_buffers];
yading@10:     av_frame_move_ref(dst, f->f);
yading@10: 
yading@10:     p->num_released_buffers++;
yading@10: 
yading@10: fail:
yading@10:     pthread_mutex_unlock(&fctx->buffer_mutex);
yading@10: }
yading@10: 
yading@10: /**
yading@10:  * Set the threading algorithms used.
yading@10:  *
yading@10:  * Threading requires more than one thread.
yading@10:  * Frame threading requires entire frames to be passed to the codec,
yading@10:  * and introduces extra decoding delay, so is incompatible with low_delay.
yading@10:  *
yading@10:  * @param avctx The context.
yading@10:  */
yading@10: static void validate_thread_parameters(AVCodecContext *avctx)
yading@10: {
yading@10:     int frame_threading_supported = (avctx->codec->capabilities & CODEC_CAP_FRAME_THREADS)
yading@10:                                 && !(avctx->flags & CODEC_FLAG_TRUNCATED)
yading@10:                                 && !(avctx->flags & CODEC_FLAG_LOW_DELAY)
yading@10:                                 && !(avctx->flags2 & CODEC_FLAG2_CHUNKS);
yading@10:     if (avctx->thread_count == 1) {
yading@10:         avctx->active_thread_type = 0;
yading@10:     } else if (frame_threading_supported && (avctx->thread_type & FF_THREAD_FRAME)) {
yading@10:         avctx->active_thread_type = FF_THREAD_FRAME;
yading@10:     } else if (avctx->codec->capabilities & CODEC_CAP_SLICE_THREADS &&
yading@10:                avctx->thread_type & FF_THREAD_SLICE) {
yading@10:         avctx->active_thread_type = FF_THREAD_SLICE;
yading@10:     } else if (!(avctx->codec->capabilities & CODEC_CAP_AUTO_THREADS)) {
yading@10:         avctx->thread_count       = 1;
yading@10:         avctx->active_thread_type = 0;
yading@10:     }
yading@10: 
yading@10:     if (avctx->thread_count > MAX_AUTO_THREADS)
yading@10:         av_log(avctx, AV_LOG_WARNING,
yading@10:                "Application has requested %d threads. Using a thread count greater than %d is not recommended.\n",
yading@10:                avctx->thread_count, MAX_AUTO_THREADS);
yading@10: }
yading@10: 
yading@10: int ff_thread_init(AVCodecContext *avctx)
yading@10: {
yading@10:     if (avctx->thread_opaque) {
yading@10:         av_log(avctx, AV_LOG_ERROR, "avcodec_thread_init is ignored after avcodec_open\n");
yading@10:         return -1;
yading@10:     }
yading@10: 
yading@10: #if HAVE_W32THREADS
yading@10:     w32thread_init();
yading@10: #endif
yading@10: 
yading@10:     if (avctx->codec) {
yading@10:         validate_thread_parameters(avctx);
yading@10: 
yading@10:         if (avctx->active_thread_type&FF_THREAD_SLICE)
yading@10:             return thread_init(avctx);
yading@10:         else if (avctx->active_thread_type&FF_THREAD_FRAME)
yading@10:             return frame_thread_init(avctx);
yading@10:     }
yading@10: 
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: void ff_thread_free(AVCodecContext *avctx)
yading@10: {
yading@10:     if (avctx->active_thread_type&FF_THREAD_FRAME)
yading@10:         frame_thread_free(avctx, avctx->thread_count);
yading@10:     else
yading@10:         thread_free(avctx);
yading@10: }