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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /media/ffvpx/libavcodec/pthread_frame.c
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
Diffstat (limited to 'media/ffvpx/libavcodec/pthread_frame.c')
-rw-r--r--media/ffvpx/libavcodec/pthread_frame.c900
1 files changed, 900 insertions, 0 deletions
diff --git a/media/ffvpx/libavcodec/pthread_frame.c b/media/ffvpx/libavcodec/pthread_frame.c
new file mode 100644
index 000000000..a10fcbfe7
--- /dev/null
+++ b/media/ffvpx/libavcodec/pthread_frame.c
@@ -0,0 +1,900 @@
+/*
+ * 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 <stdint.h>
+
+#include "avcodec.h"
+#include "internal.h"
+#include "pthread_internal.h"
+#include "thread.h"
+#include "version.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"
+
+#if defined(MOZ_TSAN)
+typedef _Atomic(int) atomic_int;
+#else
+typedef volatile int atomic_int;
+#endif
+
+/**
+ * Context used by codec threads and stored in their AVCodecInternal thread_ctx.
+ */
+typedef 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;
+
+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).
+
+ 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;
+
+ /**
+ * 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
+
+ int die; ///< Set when the thread should exit.
+} 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.
+
+ 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.
+ */
+} FrameThreadContext;
+
+#define THREAD_SAFE_CALLBACKS(avctx) \
+((avctx)->thread_safe_callbacks || (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;
+ AVCodecContext *avctx = p->avctx;
+ const AVCodec *codec = avctx->codec;
+
+ pthread_mutex_lock(&p->mutex);
+ while (1) {
+ while (p->state == STATE_INPUT_READY && !p->die)
+ pthread_cond_wait(&p->input_cond, &p->mutex);
+
+ if (p->die) break;
+
+ if (!codec->update_thread_context && THREAD_SAFE_CALLBACKS(avctx))
+ ff_thread_finish_setup(avctx);
+
+ av_frame_unref(p->frame);
+ p->got_frame = 0;
+ p->result = codec->decode(avctx, p->frame, &p->got_frame, &p->avpkt);
+
+ if ((p->result < 0 || !p->got_frame) && p->frame->buf[0]) {
+ if (avctx->internal->allocate_progress)
+ av_log(avctx, AV_LOG_ERROR, "A frame threaded decoder did not "
+ "free the frame on failure. This is a bug, please report it.\n");
+ av_frame_unref(p->frame);
+ }
+
+ 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
+ * @return 0 on success, negative error code on failure
+ */
+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->framerate = src->framerate;
+ 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;
+#if FF_API_AFD
+FF_DISABLE_DEPRECATION_WARNINGS
+ dst->dtg_active_format = src->dtg_active_format;
+FF_ENABLE_DEPRECATION_WARNINGS
+#endif /* FF_API_AFD */
+
+ 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;
+ dst->internal->hwaccel_priv_data = src->internal->hwaccel_priv_data;
+ }
+
+ if (for_user) {
+ dst->delay = src->thread_count - 1;
+#if FF_API_CODED_FRAME
+FF_DISABLE_DEPRECATION_WARNINGS
+ dst->coded_frame = src->coded_frame;
+FF_ENABLE_DEPRECATION_WARNINGS
+#endif
+ } 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;
+
+ 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 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;
+ 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 & AV_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_packet_unref(&p->avpkt);
+ av_packet_ref(&p->avpkt, avpkt);
+
+ 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.
+ */
+
+ if (!p->avctx->thread_safe_callbacks && (
+ p->avctx->get_format != avcodec_default_get_format ||
+ p->avctx->get_buffer2 != avcodec_default_get_buffer2)) {
+ 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);
+
+ State p_state = (State)p->state;
+ 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 = ff_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->internal->thread_ctx;
+ 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;
+
+ if (p->result < 0)
+ err = p->result;
+
+ /*
+ * 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;
+
+ /*
+ * When no frame was found while flushing, but an error occurred in
+ * any thread, return it instead of 0.
+ * Otherwise the error can get lost.
+ */
+ if (!avpkt->size && !*got_picture_ptr)
+ return err;
+
+ /* 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;
+ atomic_int *progress = f->progress ? (atomic_int*)f->progress->data : NULL;
+
+ if (!progress || progress[field] >= n) return;
+
+ p = f->owner->internal->thread_ctx;
+
+ 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;
+ atomic_int *progress = f->progress ? (atomic_int*)f->progress->data : NULL;
+
+ if (!progress || progress[field] >= n) return;
+
+ p = f->owner->internal->thread_ctx;
+
+ 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->internal->thread_ctx;
+
+ 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;
+ }
+}
+
+void ff_frame_thread_free(AVCodecContext *avctx, int thread_count)
+{
+ FrameThreadContext *fctx = avctx->internal->thread_ctx;
+ const AVCodec *codec = avctx->codec;
+ int i;
+
+ park_frame_worker_threads(fctx, thread_count);
+
+ if (fctx->prev_thread && fctx->prev_thread != fctx->threads)
+ 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;
+ }
+
+ for (i = 0; i < thread_count; i++) {
+ PerThreadContext *p = &fctx->threads[i];
+
+ pthread_mutex_lock(&p->mutex);
+ p->die = 1;
+ pthread_cond_signal(&p->input_cond);
+ pthread_mutex_unlock(&p->mutex);
+
+ if (p->thread_init)
+ pthread_join(p->thread, NULL);
+ p->thread_init=0;
+
+ if (codec->close && p->avctx)
+ codec->close(p->avctx);
+
+ release_delayed_buffers(p);
+ av_frame_free(&p->frame);
+ }
+
+ for (i = 0; i < thread_count; i++) {
+ PerThreadContext *p = &fctx->threads[i];
+
+ pthread_mutex_destroy(&p->mutex);
+ pthread_mutex_destroy(&p->progress_mutex);
+ pthread_cond_destroy(&p->input_cond);
+ pthread_cond_destroy(&p->progress_cond);
+ pthread_cond_destroy(&p->output_cond);
+ av_packet_unref(&p->avpkt);
+ av_freep(&p->released_buffers);
+
+ if (i && p->avctx) {
+ av_freep(&p->avctx->priv_data);
+ av_freep(&p->avctx->slice_offset);
+ }
+
+ if (p->avctx)
+ av_freep(&p->avctx->internal);
+ av_freep(&p->avctx);
+ }
+
+ av_freep(&fctx->threads);
+ pthread_mutex_destroy(&fctx->buffer_mutex);
+ av_freep(&avctx->internal->thread_ctx);
+
+ if (avctx->priv_data && avctx->codec && avctx->codec->priv_class)
+ av_opt_free(avctx->priv_data);
+ avctx->codec = NULL;
+}
+
+int ff_frame_thread_init(AVCodecContext *avctx)
+{
+ int thread_count = avctx->thread_count;
+ const AVCodec *codec = avctx->codec;
+ AVCodecContext *src = avctx;
+ FrameThreadContext *fctx;
+ int i, err = 0;
+
+#if HAVE_W32THREADS
+ w32thread_init();
+#endif
+
+ if (!thread_count) {
+ int nb_cpus = av_cpu_count();
+ 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->internal->thread_ctx = fctx = av_mallocz(sizeof(FrameThreadContext));
+ if (!fctx)
+ return AVERROR(ENOMEM);
+
+ fctx->threads = av_mallocz_array(thread_count, sizeof(PerThreadContext));
+ if (!fctx->threads) {
+ av_freep(&avctx->internal->thread_ctx);
+ return AVERROR(ENOMEM);
+ }
+
+ 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->frame = av_frame_alloc();
+ if (!p->frame) {
+ av_freep(&copy);
+ err = AVERROR(ENOMEM);
+ goto error;
+ }
+
+ p->parent = fctx;
+ p->avctx = copy;
+
+ if (!copy) {
+ err = AVERROR(ENOMEM);
+ goto error;
+ }
+
+ *copy = *src;
+
+ copy->internal = av_malloc(sizeof(AVCodecInternal));
+ if (!copy->internal) {
+ copy->priv_data = NULL;
+ err = AVERROR(ENOMEM);
+ goto error;
+ }
+ *copy->internal = *src->internal;
+ copy->internal->thread_ctx = p;
+ copy->internal->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->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:
+ ff_frame_thread_free(avctx, i+1);
+
+ return err;
+}
+
+void ff_thread_flush(AVCodecContext *avctx)
+{
+ int i;
+ FrameThreadContext *fctx = avctx->internal->thread_ctx;
+
+ if (!fctx) return;
+
+ park_frame_worker_threads(fctx, avctx->thread_count);
+ if (fctx->prev_thread) {
+ if (fctx->prev_thread != &fctx->threads[0])
+ update_context_from_thread(fctx->threads[0].avctx, fctx->prev_thread->avctx, 0);
+ }
+
+ fctx->next_decoding = fctx->next_finished = 0;
+ fctx->delaying = 1;
+ fctx->prev_thread = NULL;
+ for (i = 0; i < avctx->thread_count; i++) {
+ PerThreadContext *p = &fctx->threads[i];
+ // Make sure decode flush calls with size=0 won't return old frames
+ p->got_frame = 0;
+ av_frame_unref(p->frame);
+
+ release_delayed_buffers(p);
+
+ if (avctx->codec->flush)
+ avctx->codec->flush(p->avctx);
+ }
+}
+
+int ff_thread_can_start_frame(AVCodecContext *avctx)
+{
+ PerThreadContext *p = avctx->internal->thread_ctx;
+ 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->internal->thread_ctx;
+ 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);
+ if (avctx->thread_safe_callbacks ||
+ avctx->get_buffer2 == avcodec_default_get_buffer2) {
+ 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->internal->thread_ctx;
+ if (!(avctx->active_thread_type & FF_THREAD_FRAME) || avctx->thread_safe_callbacks ||
+ avctx->get_format == avcodec_default_get_format)
+ return ff_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->internal->thread_ctx;
+ FrameThreadContext *fctx;
+ AVFrame *dst, *tmp;
+ int can_direct_free = !(avctx->active_thread_type & FF_THREAD_FRAME) ||
+ avctx->thread_safe_callbacks ||
+ avctx->get_buffer2 == avcodec_default_get_buffer2;
+
+ if (!f->f || !f->f->buf[0])
+ return;
+
+ if (avctx->debug & FF_DEBUG_BUFFERS)
+ av_log(avctx, AV_LOG_DEBUG, "thread_release_buffer called on pic %p\n", f);
+
+ av_buffer_unref(&f->progress);
+ f->owner = NULL;
+
+ if (can_direct_free) {
+ av_frame_unref(f->f);
+ return;
+ }
+
+ fctx = p->parent;
+ pthread_mutex_lock(&fctx->buffer_mutex);
+
+ if (p->num_released_buffers + 1 >= INT_MAX / sizeof(*p->released_buffers))
+ goto fail;
+ tmp = av_fast_realloc(p->released_buffers, &p->released_buffers_allocated,
+ (p->num_released_buffers + 1) *
+ sizeof(*p->released_buffers));
+ if (!tmp)
+ goto fail;
+ p->released_buffers = tmp;
+
+ dst = &p->released_buffers[p->num_released_buffers];
+ av_frame_move_ref(dst, f->f);
+
+ p->num_released_buffers++;
+
+fail:
+ pthread_mutex_unlock(&fctx->buffer_mutex);
+}