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-rw-r--r--libavcodec/frame_thread_encoder.c295
1 files changed, 295 insertions, 0 deletions
diff --git a/libavcodec/frame_thread_encoder.c b/libavcodec/frame_thread_encoder.c
new file mode 100644
index 0000000000..8e40532dc8
--- /dev/null
+++ b/libavcodec/frame_thread_encoder.c
@@ -0,0 +1,295 @@
+/*
+ * Copyright (c) 2012 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * 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
+ */
+
+#include "frame_thread_encoder.h"
+
+#include "libavutil/fifo.h"
+#include "libavutil/avassert.h"
+#include "libavutil/imgutils.h"
+#include "avcodec.h"
+#include "internal.h"
+#include "thread.h"
+
+#if HAVE_PTHREADS
+#include <pthread.h>
+#elif HAVE_W32THREADS
+#include "compat/w32pthreads.h"
+#elif HAVE_OS2THREADS
+#include "compat/os2threads.h"
+#endif
+
+#define MAX_THREADS 64
+#define BUFFER_SIZE (2*MAX_THREADS)
+
+typedef struct{
+ void *indata;
+ void *outdata;
+ int64_t return_code;
+ unsigned index;
+} Task;
+
+typedef struct{
+ AVCodecContext *parent_avctx;
+ pthread_mutex_t buffer_mutex;
+
+ AVFifoBuffer *task_fifo;
+ pthread_mutex_t task_fifo_mutex;
+ pthread_cond_t task_fifo_cond;
+
+ Task finished_tasks[BUFFER_SIZE];
+ pthread_mutex_t finished_task_mutex;
+ pthread_cond_t finished_task_cond;
+
+ unsigned task_index;
+ unsigned finished_task_index;
+
+ pthread_t worker[MAX_THREADS];
+ int exit;
+} ThreadContext;
+
+static void * attribute_align_arg worker(void *v){
+ AVCodecContext *avctx = v;
+ ThreadContext *c = avctx->internal->frame_thread_encoder;
+ AVPacket *pkt = NULL;
+
+ while(!c->exit){
+ int got_packet, ret;
+ AVFrame *frame;
+ Task task;
+
+ if(!pkt) pkt= av_mallocz(sizeof(*pkt));
+ if(!pkt) continue;
+ av_init_packet(pkt);
+
+ pthread_mutex_lock(&c->task_fifo_mutex);
+ while (av_fifo_size(c->task_fifo) <= 0 || c->exit) {
+ if(c->exit){
+ pthread_mutex_unlock(&c->task_fifo_mutex);
+ goto end;
+ }
+ pthread_cond_wait(&c->task_fifo_cond, &c->task_fifo_mutex);
+ }
+ av_fifo_generic_read(c->task_fifo, &task, sizeof(task), NULL);
+ pthread_mutex_unlock(&c->task_fifo_mutex);
+ frame = task.indata;
+
+ ret = avcodec_encode_video2(avctx, pkt, frame, &got_packet);
+ pthread_mutex_lock(&c->buffer_mutex);
+ av_frame_unref(frame);
+ pthread_mutex_unlock(&c->buffer_mutex);
+ av_frame_free(&frame);
+ if(got_packet) {
+ av_dup_packet(pkt);
+ } else {
+ pkt->data = NULL;
+ pkt->size = 0;
+ }
+ pthread_mutex_lock(&c->finished_task_mutex);
+ c->finished_tasks[task.index].outdata = pkt; pkt = NULL;
+ c->finished_tasks[task.index].return_code = ret;
+ pthread_cond_signal(&c->finished_task_cond);
+ pthread_mutex_unlock(&c->finished_task_mutex);
+ }
+end:
+ av_free(pkt);
+ pthread_mutex_lock(&c->buffer_mutex);
+ avcodec_close(avctx);
+ pthread_mutex_unlock(&c->buffer_mutex);
+ av_freep(&avctx);
+ return NULL;
+}
+
+int ff_frame_thread_encoder_init(AVCodecContext *avctx, AVDictionary *options){
+ int i=0;
+ ThreadContext *c;
+
+
+ if( !(avctx->thread_type & FF_THREAD_FRAME)
+ || !(avctx->codec->capabilities & CODEC_CAP_INTRA_ONLY))
+ return 0;
+
+ if( !avctx->thread_count
+ && avctx->codec_id == AV_CODEC_ID_MJPEG
+ && !(avctx->flags & AV_CODEC_FLAG_QSCALE)) {
+ av_log(avctx, AV_LOG_DEBUG,
+ "Forcing thread count to 1 for MJPEG encoding, use -thread_type slice "
+ "or a constant quantizer if you want to use multiple cpu cores\n");
+ avctx->thread_count = 1;
+ }
+ if( avctx->thread_count > 1
+ && avctx->codec_id == AV_CODEC_ID_MJPEG
+ && !(avctx->flags & AV_CODEC_FLAG_QSCALE))
+ av_log(avctx, AV_LOG_WARNING,
+ "MJPEG CBR encoding works badly with frame multi-threading, consider "
+ "using -threads 1, -thread_type slice or a constant quantizer.\n");
+
+ if (avctx->codec_id == AV_CODEC_ID_HUFFYUV ||
+ avctx->codec_id == AV_CODEC_ID_FFVHUFF) {
+ int warn = 0;
+ if (avctx->flags & AV_CODEC_FLAG_PASS1)
+ warn = 1;
+ else if(avctx->context_model > 0) {
+ AVDictionaryEntry *t = av_dict_get(options, "non_deterministic",
+ NULL, AV_DICT_MATCH_CASE);
+ warn = !t || !t->value || !atoi(t->value) ? 1 : 0;
+ }
+ // huffyuv does not support these with multiple frame threads currently
+ if (warn) {
+ av_log(avctx, AV_LOG_WARNING,
+ "Forcing thread count to 1 for huffyuv encoding with first pass or context 1\n");
+ avctx->thread_count = 1;
+ }
+ }
+
+ if(!avctx->thread_count) {
+ avctx->thread_count = av_cpu_count();
+ avctx->thread_count = FFMIN(avctx->thread_count, MAX_THREADS);
+ }
+
+ if(avctx->thread_count <= 1)
+ return 0;
+
+ if(avctx->thread_count > MAX_THREADS)
+ return AVERROR(EINVAL);
+
+ av_assert0(!avctx->internal->frame_thread_encoder);
+ c = avctx->internal->frame_thread_encoder = av_mallocz(sizeof(ThreadContext));
+ if(!c)
+ return AVERROR(ENOMEM);
+
+ c->parent_avctx = avctx;
+
+ c->task_fifo = av_fifo_alloc_array(BUFFER_SIZE, sizeof(Task));
+ if(!c->task_fifo)
+ goto fail;
+
+ pthread_mutex_init(&c->task_fifo_mutex, NULL);
+ pthread_mutex_init(&c->finished_task_mutex, NULL);
+ pthread_mutex_init(&c->buffer_mutex, NULL);
+ pthread_cond_init(&c->task_fifo_cond, NULL);
+ pthread_cond_init(&c->finished_task_cond, NULL);
+
+ for(i=0; i<avctx->thread_count ; i++){
+ AVDictionary *tmp = NULL;
+ void *tmpv;
+ AVCodecContext *thread_avctx = avcodec_alloc_context3(avctx->codec);
+ if(!thread_avctx)
+ goto fail;
+ tmpv = thread_avctx->priv_data;
+ *thread_avctx = *avctx;
+ thread_avctx->priv_data = tmpv;
+ thread_avctx->internal = NULL;
+ memcpy(thread_avctx->priv_data, avctx->priv_data, avctx->codec->priv_data_size);
+ thread_avctx->thread_count = 1;
+ thread_avctx->active_thread_type &= ~FF_THREAD_FRAME;
+
+ av_dict_copy(&tmp, options, 0);
+ av_dict_set(&tmp, "threads", "1", 0);
+ if(avcodec_open2(thread_avctx, avctx->codec, &tmp) < 0) {
+ av_dict_free(&tmp);
+ goto fail;
+ }
+ av_dict_free(&tmp);
+ av_assert0(!thread_avctx->internal->frame_thread_encoder);
+ thread_avctx->internal->frame_thread_encoder = c;
+ if(pthread_create(&c->worker[i], NULL, worker, thread_avctx)) {
+ goto fail;
+ }
+ }
+
+ avctx->active_thread_type = FF_THREAD_FRAME;
+
+ return 0;
+fail:
+ avctx->thread_count = i;
+ av_log(avctx, AV_LOG_ERROR, "ff_frame_thread_encoder_init failed\n");
+ ff_frame_thread_encoder_free(avctx);
+ return -1;
+}
+
+void ff_frame_thread_encoder_free(AVCodecContext *avctx){
+ int i;
+ ThreadContext *c= avctx->internal->frame_thread_encoder;
+
+ pthread_mutex_lock(&c->task_fifo_mutex);
+ c->exit = 1;
+ pthread_cond_broadcast(&c->task_fifo_cond);
+ pthread_mutex_unlock(&c->task_fifo_mutex);
+
+ for (i=0; i<avctx->thread_count; i++) {
+ pthread_join(c->worker[i], NULL);
+ }
+
+ pthread_mutex_destroy(&c->task_fifo_mutex);
+ pthread_mutex_destroy(&c->finished_task_mutex);
+ pthread_mutex_destroy(&c->buffer_mutex);
+ pthread_cond_destroy(&c->task_fifo_cond);
+ pthread_cond_destroy(&c->finished_task_cond);
+ av_fifo_freep(&c->task_fifo);
+ av_freep(&avctx->internal->frame_thread_encoder);
+}
+
+int ff_thread_video_encode_frame(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *frame, int *got_packet_ptr){
+ ThreadContext *c = avctx->internal->frame_thread_encoder;
+ Task task;
+ int ret;
+
+ av_assert1(!*got_packet_ptr);
+
+ if(frame){
+ AVFrame *new = av_frame_alloc();
+ if(!new)
+ return AVERROR(ENOMEM);
+ ret = av_frame_ref(new, frame);
+ if(ret < 0) {
+ av_frame_free(&new);
+ return ret;
+ }
+
+ task.index = c->task_index;
+ task.indata = (void*)new;
+ pthread_mutex_lock(&c->task_fifo_mutex);
+ av_fifo_generic_write(c->task_fifo, &task, sizeof(task), NULL);
+ pthread_cond_signal(&c->task_fifo_cond);
+ pthread_mutex_unlock(&c->task_fifo_mutex);
+
+ c->task_index = (c->task_index+1) % BUFFER_SIZE;
+
+ if(!c->finished_tasks[c->finished_task_index].outdata && (c->task_index - c->finished_task_index) % BUFFER_SIZE <= avctx->thread_count)
+ return 0;
+ }
+
+ if(c->task_index == c->finished_task_index)
+ return 0;
+
+ pthread_mutex_lock(&c->finished_task_mutex);
+ while (!c->finished_tasks[c->finished_task_index].outdata) {
+ pthread_cond_wait(&c->finished_task_cond, &c->finished_task_mutex);
+ }
+ task = c->finished_tasks[c->finished_task_index];
+ *pkt = *(AVPacket*)(task.outdata);
+ if(pkt->data)
+ *got_packet_ptr = 1;
+ av_freep(&c->finished_tasks[c->finished_task_index].outdata);
+ c->finished_task_index = (c->finished_task_index+1) % BUFFER_SIZE;
+ pthread_mutex_unlock(&c->finished_task_mutex);
+
+ return task.return_code;
+}