From 6a9c85944427e3c4355bce67d7f677ec69527bff Mon Sep 17 00:00:00 2001
From: Alexander Strange <astrange@ithinksw.com>
Date: Thu, 2 Jun 2011 10:15:58 -0700
Subject: H264/MPEG frame-level multi-threading.

Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
---
 libavcodec/mpegvideo_enc.c | 24 +++++++++++++-----------
 1 file changed, 13 insertions(+), 11 deletions(-)

(limited to 'libavcodec/mpegvideo_enc.c')

diff --git a/libavcodec/mpegvideo_enc.c b/libavcodec/mpegvideo_enc.c
index a212149189..237ea64790 100644
--- a/libavcodec/mpegvideo_enc.c
+++ b/libavcodec/mpegvideo_enc.c
@@ -36,6 +36,7 @@
 #include "mjpegenc.h"
 #include "msmpeg4.h"
 #include "faandct.h"
+#include "thread.h"
 #include "aandcttab.h"
 #include "flv.h"
 #include "mpeg4video.h"
@@ -1225,9 +1226,9 @@ int MPV_encode_picture(AVCodecContext *avctx,
 {
     MpegEncContext *s = avctx->priv_data;
     AVFrame *pic_arg = data;
-    int i, stuffing_count;
+    int i, stuffing_count, context_count = avctx->active_thread_type&FF_THREAD_SLICE ? avctx->thread_count : 1;
 
-    for(i=0; i<avctx->thread_count; i++){
+    for(i=0; i<context_count; i++){
         int start_y= s->thread_context[i]->start_mb_y;
         int   end_y= s->thread_context[i]->  end_mb_y;
         int h= s->mb_height;
@@ -1291,7 +1292,7 @@ vbv_retry:
                     s->last_non_b_time= s->time - s->pp_time;
                 }
 //                av_log(NULL, AV_LOG_ERROR, "R:%d ", s->next_lambda);
-                for(i=0; i<avctx->thread_count; i++){
+                for(i=0; i<context_count; i++){
                     PutBitContext *pb= &s->thread_context[i]->pb;
                     init_put_bits(pb, pb->buf, pb->buf_end - pb->buf);
                 }
@@ -2758,6 +2759,7 @@ static int encode_picture(MpegEncContext *s, int picture_number)
 {
     int i;
     int bits;
+    int context_count = (s->avctx->active_thread_type & FF_THREAD_SLICE) ? s->avctx->thread_count : 1;
 
     s->picture_number = picture_number;
 
@@ -2797,7 +2799,7 @@ static int encode_picture(MpegEncContext *s, int picture_number)
     }
 
     s->mb_intra=0; //for the rate distortion & bit compare functions
-    for(i=1; i<s->avctx->thread_count; i++){
+    for(i=1; i<context_count; i++){
         ff_update_duplicate_context(s->thread_context[i], s);
     }
 
@@ -2810,11 +2812,11 @@ static int encode_picture(MpegEncContext *s, int picture_number)
         s->lambda2= (s->lambda2* (int64_t)s->avctx->me_penalty_compensation + 128)>>8;
         if(s->pict_type != AV_PICTURE_TYPE_B && s->avctx->me_threshold==0){
             if((s->avctx->pre_me && s->last_non_b_pict_type==AV_PICTURE_TYPE_I) || s->avctx->pre_me==2){
-                s->avctx->execute(s->avctx, pre_estimate_motion_thread, &s->thread_context[0], NULL, s->avctx->thread_count, sizeof(void*));
+                s->avctx->execute(s->avctx, pre_estimate_motion_thread, &s->thread_context[0], NULL, context_count, sizeof(void*));
             }
         }
 
-        s->avctx->execute(s->avctx, estimate_motion_thread, &s->thread_context[0], NULL, s->avctx->thread_count, sizeof(void*));
+        s->avctx->execute(s->avctx, estimate_motion_thread, &s->thread_context[0], NULL, context_count, sizeof(void*));
     }else /* if(s->pict_type == AV_PICTURE_TYPE_I) */{
         /* I-Frame */
         for(i=0; i<s->mb_stride*s->mb_height; i++)
@@ -2822,10 +2824,10 @@ static int encode_picture(MpegEncContext *s, int picture_number)
 
         if(!s->fixed_qscale){
             /* finding spatial complexity for I-frame rate control */
-            s->avctx->execute(s->avctx, mb_var_thread, &s->thread_context[0], NULL, s->avctx->thread_count, sizeof(void*));
+            s->avctx->execute(s->avctx, mb_var_thread, &s->thread_context[0], NULL, context_count, sizeof(void*));
         }
     }
-    for(i=1; i<s->avctx->thread_count; i++){
+    for(i=1; i<context_count; i++){
         merge_context_after_me(s, s->thread_context[i]);
     }
     s->current_picture.mc_mb_var_sum= s->current_picture_ptr->mc_mb_var_sum= s->me.mc_mb_var_sum_temp;
@@ -2961,11 +2963,11 @@ static int encode_picture(MpegEncContext *s, int picture_number)
     bits= put_bits_count(&s->pb);
     s->header_bits= bits - s->last_bits;
 
-    for(i=1; i<s->avctx->thread_count; i++){
+    for(i=1; i<context_count; i++){
         update_duplicate_context_after_me(s->thread_context[i], s);
     }
-    s->avctx->execute(s->avctx, encode_thread, &s->thread_context[0], NULL, s->avctx->thread_count, sizeof(void*));
-    for(i=1; i<s->avctx->thread_count; i++){
+    s->avctx->execute(s->avctx, encode_thread, &s->thread_context[0], NULL, context_count, sizeof(void*));
+    for(i=1; i<context_count; i++){
         merge_context_after_encode(s, s->thread_context[i]);
     }
     emms_c();
-- 
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