mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-12 19:18:44 +02:00
432adca5fe
AVCodecContext.slice_{count,offset} are unneeded since 2007, commit
383b123ed3
and following. Deprecate those
fields.
984 lines
31 KiB
C
984 lines
31 KiB
C
/*
|
|
* 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 "codec_internal.h"
|
|
#include "decode.h"
|
|
#include "hwconfig.h"
|
|
#include "internal.h"
|
|
#include "pthread_internal.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 when the codec calls get_buffer().
|
|
* State is returned to STATE_SETTING_UP afterwards.
|
|
*/
|
|
STATE_GET_BUFFER,
|
|
/**
|
|
* Set when the codec calls get_format().
|
|
* State is returned to STATE_SETTING_UP afterwards.
|
|
*/
|
|
STATE_GET_FORMAT,
|
|
///< 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
|
|
};
|
|
|
|
/**
|
|
* 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;
|
|
|
|
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 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 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 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 hwaccel then we take the lock to ensure
|
|
* the threads don't run concurrently */
|
|
if (avctx->hwaccel) {
|
|
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])
|
|
ff_thread_release_buffer(avctx, p->frame);
|
|
|
|
if (atomic_load(&p->state) == STATE_SETTING_UP)
|
|
ff_thread_finish_setup(avctx);
|
|
|
|
if (p->hwaccel_serializing) {
|
|
/* wipe hwaccel state 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);
|
|
|
|
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, 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;
|
|
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->sample_rate = src->sample_rate;
|
|
dst->sample_fmt = src->sample_fmt;
|
|
#if FF_API_OLD_CHANNEL_LAYOUT
|
|
FF_DISABLE_DEPRECATION_WARNINGS
|
|
dst->channels = src->channels;
|
|
dst->channel_layout = src->channel_layout;
|
|
FF_ENABLE_DEPRECATION_WARNINGS
|
|
#endif
|
|
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;
|
|
|
|
err = av_buffer_replace(&dst->internal->pool, src->internal->pool);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
|
|
if (for_user) {
|
|
if (codec->update_thread_context_for_user)
|
|
err = codec->update_thread_context_for_user(dst, src);
|
|
} else {
|
|
if (codec->update_thread_context)
|
|
err = 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)
|
|
{
|
|
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;
|
|
#if FF_API_AVCTX_FRAME_NUMBER
|
|
FF_DISABLE_DEPRECATION_WARNINGS
|
|
dst->frame_number = src->frame_number;
|
|
FF_ENABLE_DEPRECATION_WARNINGS
|
|
#endif
|
|
#if FF_API_REORDERED_OPAQUE
|
|
FF_DISABLE_DEPRECATION_WARNINGS
|
|
dst->reordered_opaque = src->reordered_opaque;
|
|
FF_ENABLE_DEPRECATION_WARNINGS
|
|
#endif
|
|
|
|
#if FF_API_SLICE_OFFSET
|
|
FF_DISABLE_DEPRECATION_WARNINGS
|
|
if (src->slice_count && src->slice_offset) {
|
|
if (dst->slice_count < src->slice_count) {
|
|
int err = av_reallocp_array(&dst->slice_offset, src->slice_count,
|
|
sizeof(*dst->slice_offset));
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
memcpy(dst->slice_offset, src->slice_offset,
|
|
src->slice_count * sizeof(*dst->slice_offset));
|
|
}
|
|
dst->slice_count = src->slice_count;
|
|
FF_ENABLE_DEPRECATION_WARNINGS
|
|
#endif
|
|
|
|
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);
|
|
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 ? (atomic_int*)f->progress->data : NULL;
|
|
|
|
if (!progress ||
|
|
atomic_load_explicit(&progress[field], memory_order_relaxed) >= n)
|
|
return;
|
|
|
|
p = f->owner[field]->internal->thread_ctx;
|
|
|
|
if (atomic_load_explicit(&p->debug_threads, memory_order_relaxed))
|
|
av_log(f->owner[field], AV_LOG_DEBUG,
|
|
"%p finished %d field %d\n", progress, n, field);
|
|
|
|
pthread_mutex_lock(&p->progress_mutex);
|
|
|
|
atomic_store_explicit(&progress[field], n, memory_order_release);
|
|
|
|
pthread_cond_broadcast(&p->progress_cond);
|
|
pthread_mutex_unlock(&p->progress_mutex);
|
|
}
|
|
|
|
void ff_thread_await_progress(const ThreadFrame *f, int n, int field)
|
|
{
|
|
PerThreadContext *p;
|
|
atomic_int *progress = f->progress ? (atomic_int*)f->progress->data : NULL;
|
|
|
|
if (!progress ||
|
|
atomic_load_explicit(&progress[field], memory_order_acquire) >= n)
|
|
return;
|
|
|
|
p = f->owner[field]->internal->thread_ctx;
|
|
|
|
if (atomic_load_explicit(&p->debug_threads, memory_order_relaxed))
|
|
av_log(f->owner[field], AV_LOG_DEBUG,
|
|
"thread awaiting %d field %d from %p\n", n, field, progress);
|
|
|
|
pthread_mutex_lock(&p->progress_mutex);
|
|
while (atomic_load_explicit(&progress[field], memory_order_relaxed) < n)
|
|
pthread_cond_wait(&p->progress_cond, &p->progress_mutex);
|
|
pthread_mutex_unlock(&p->progress_mutex);
|
|
}
|
|
|
|
void ff_thread_finish_setup(AVCodecContext *avctx) {
|
|
PerThreadContext *p = avctx->internal->thread_ctx;
|
|
|
|
if (!(avctx->active_thread_type&FF_THREAD_FRAME)) return;
|
|
|
|
if (avctx->hwaccel && !p->hwaccel_serializing) {
|
|
pthread_mutex_lock(&p->parent->hwaccel_mutex);
|
|
p->hwaccel_serializing = 1;
|
|
}
|
|
|
|
/* this assumes that no hwaccel calls happen before ff_thread_finish_setup() */
|
|
if (avctx->hwaccel &&
|
|
!(avctx->hwaccel->caps_internal & HWACCEL_CAP_ASYNC_SAFE)) {
|
|
p->async_serializing = 1;
|
|
|
|
async_lock(p->parent);
|
|
}
|
|
|
|
/* 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);
|
|
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);
|
|
|
|
if (ctx->priv_data) {
|
|
if (codec->p.priv_class)
|
|
av_opt_free(ctx->priv_data);
|
|
av_freep(&ctx->priv_data);
|
|
}
|
|
|
|
#if FF_API_SLICE_OFFSET
|
|
FF_DISABLE_DEPRECATION_WARNINGS
|
|
av_freep(&ctx->slice_offset);
|
|
FF_ENABLE_DEPRECATION_WARNINGS
|
|
#endif
|
|
|
|
av_buffer_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_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 avcodec_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;
|
|
|
|
/* 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 = av_mallocz(sizeof(*copy->internal));
|
|
if (!copy->internal)
|
|
return AVERROR(ENOMEM);
|
|
copy->internal->thread_ctx = p;
|
|
|
|
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);
|
|
|
|
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)
|
|
{
|
|
PerThreadContext *p = avctx->internal->thread_ctx;
|
|
|
|
if ((avctx->active_thread_type&FF_THREAD_FRAME) && atomic_load(&p->state) != STATE_SETTING_UP &&
|
|
ffcodec(avctx->codec)->update_thread_context) {
|
|
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 and and VP7.
|
|
* 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);
|
|
|
|
if (ffcodec(avctx->codec)->caps_internal & FF_CODEC_CAP_ALLOCATE_PROGRESS) {
|
|
atomic_int *progress;
|
|
f->progress = av_buffer_alloc(2 * sizeof(*progress));
|
|
if (!f->progress) {
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
progress = (atomic_int*)f->progress->data;
|
|
|
|
atomic_init(&progress[0], -1);
|
|
atomic_init(&progress[1], -1);
|
|
}
|
|
|
|
ret = ff_thread_get_buffer(avctx, f->f, flags);
|
|
if (ret)
|
|
av_buffer_unref(&f->progress);
|
|
return ret;
|
|
}
|
|
|
|
void ff_thread_release_buffer(AVCodecContext *avctx, AVFrame *f)
|
|
{
|
|
if (!f)
|
|
return;
|
|
|
|
if (avctx->debug & FF_DEBUG_BUFFERS)
|
|
av_log(avctx, AV_LOG_DEBUG, "thread_release_buffer called on pic %p\n", f);
|
|
|
|
av_frame_unref(f);
|
|
}
|
|
|
|
void ff_thread_release_ext_buffer(AVCodecContext *avctx, ThreadFrame *f)
|
|
{
|
|
av_buffer_unref(&f->progress);
|
|
f->owner[0] = f->owner[1] = NULL;
|
|
ff_thread_release_buffer(avctx, f->f);
|
|
}
|