* modules/codec/ffmpeg/encoder.c: work around stupid timestamping behaviour in libavcodec.

modules/codec/ffmpeg/encoder.c

@@ -51,6 +51,8 @@
 #define HURRY_UP_GUARD2 (300000)
 #define HURRY_UP_GUARD3 (100000)
 
+#define MAX_FRAME_DELAY (FF_MAX_B_FRAMES + 2)
+
 /*****************************************************************************
  * Local prototypes
  *****************************************************************************/
@@ -135,6 +137,10 @@ struct encoder_sys_t
     vlc_bool_t b_mpeg4_matrix;
     vlc_bool_t b_trellis;
     int        i_quality; /* for VBR */
+
+    /* Used to work around stupid timestamping behaviour in libavcodec */
+    uint64_t i_framenum;
+    mtime_t  pi_delay_pts[MAX_FRAME_DELAY];
 };
 
 static const char *ppsz_enc_options[] = {
@@ -202,6 +208,7 @@ int E_(OpenEncoder)( vlc_object_t *p_this )
         msg_Err( p_enc, "out of memory" );
         return VLC_EGENERIC;
     }
+    memset( p_sys, 0, sizeof(encoder_sys_t) );
     p_enc->p_sys = p_sys;
     p_sys->p_codec = p_codec;
 
@@ -210,7 +217,6 @@ int E_(OpenEncoder)( vlc_object_t *p_this )
 
     p_sys->p_buffer_out = NULL;
     p_sys->p_buffer = NULL;
-    p_sys->b_inited = 0;
 
     p_sys->p_context = p_context = avcodec_alloc_context();
 
@@ -333,7 +339,7 @@ int E_(OpenEncoder)( vlc_object_t *p_this )
         if( p_sys->i_key_int > 0 )
             p_context->gop_size = p_sys->i_key_int;
         p_context->max_b_frames =
-            __MIN( p_sys->i_b_frames, FF_MAX_B_FRAMES );
+            __MAX( __MIN( p_sys->i_b_frames, FF_MAX_B_FRAMES ), 0 );
         p_context->b_frame_strategy = 0;
 
 #if LIBAVCODEC_BUILD >= 4687
@@ -470,12 +476,6 @@ int E_(OpenEncoder)( vlc_object_t *p_this )
         p_sys->p_buffer = malloc( p_sys->i_frame_size );
     }
 
-    p_sys->i_last_ref_pts = 0;
-    p_sys->i_buggy_pts_detect = 0;
-    p_sys->i_samples_delay = 0;
-    p_sys->i_pts = 0;
-    p_sys->i_last_pts = 0;
-
     msg_Dbg( p_enc, "found encoder %s", psz_namecodec );
 
     return VLC_SUCCESS;
@@ -693,6 +693,17 @@ static block_t *EncodeVideo( encoder_t *p_enc, picture_t *p_pict )
 
     frame.quality = p_sys->i_quality;
 
+    /* Ugly work-around for stupid libavcodec behaviour */
+#if LIBAVCODEC_BUILD >= 4722
+    p_sys->i_framenum++;
+    p_sys->pi_delay_pts[p_sys->i_framenum % MAX_FRAME_DELAY] = frame.pts;
+    frame.pts = p_sys->i_framenum * AV_TIME_BASE *
+        p_enc->fmt_in.video.i_frame_rate_base;
+    frame.pts += p_enc->fmt_in.video.i_frame_rate - 1;
+    frame.pts /= p_enc->fmt_in.video.i_frame_rate;
+#endif
+    /* End work-around */
+
     i_out = avcodec_encode_video( p_sys->p_context, p_sys->p_buffer_out,
                                   AVCODEC_MAX_VIDEO_FRAME_SIZE, &frame );
 
@@ -701,21 +712,37 @@ static block_t *EncodeVideo( encoder_t *p_enc, picture_t *p_pict )
         block_t *p_block = block_New( p_enc, i_out );
         memcpy( p_block->p_buffer, p_sys->p_buffer_out, i_out );
 
-        if( p_sys->p_context->coded_frame->pts != AV_NOPTS_VALUE &&
-            p_sys->p_context->coded_frame->pts != 0 &&
-            p_sys->i_buggy_pts_detect != p_sys->p_context->coded_frame->pts )
-        {
-            p_sys->i_buggy_pts_detect = p_sys->p_context->coded_frame->pts;
-
         /* FIXME, 3-2 pulldown is not handled correctly */
         p_block->i_length = I64C(1000000) *
             p_enc->fmt_in.video.i_frame_rate_base /
                 p_enc->fmt_in.video.i_frame_rate;
+
+        if( !p_sys->p_context->max_b_frames || !p_sys->p_context->delay )
+        {
+            /* No delay -> output pts == input pts */
+            p_block->i_pts = p_block->i_dts = p_pict->date;
+        }
+        else if( p_sys->p_context->coded_frame->pts != AV_NOPTS_VALUE &&
+            p_sys->p_context->coded_frame->pts != 0 &&
+            p_sys->i_buggy_pts_detect != p_sys->p_context->coded_frame->pts )
+        {
+            p_sys->i_buggy_pts_detect = p_sys->p_context->coded_frame->pts;
             p_block->i_pts = p_sys->p_context->coded_frame->pts;
 
-            if( !p_sys->p_context->delay ||
-                ( p_sys->p_context->coded_frame->pict_type != FF_I_TYPE &&
-                  p_sys->p_context->coded_frame->pict_type != FF_P_TYPE ) )
+            /* Ugly work-around for stupid libavcodec behaviour */
+#if LIBAVCODEC_BUILD >= 4722
+            {
+            int64_t i_framenum = p_block->i_pts *
+                p_enc->fmt_in.video.i_frame_rate /
+                p_enc->fmt_in.video.i_frame_rate_base / AV_TIME_BASE;
+
+            p_block->i_pts = p_sys->pi_delay_pts[i_framenum % MAX_FRAME_DELAY];
+            }
+#endif
+            /* End work-around */
+
+            if( p_sys->p_context->coded_frame->pict_type != FF_I_TYPE &&
+                p_sys->p_context->coded_frame->pict_type != FF_P_TYPE )
             {
                 p_block->i_dts = p_block->i_pts;
             }
@@ -738,9 +765,6 @@ static block_t *EncodeVideo( encoder_t *p_enc, picture_t *p_pict )
         {
             /* Buggy libavcodec which doesn't update coded_frame->pts
              * correctly */
-            p_block->i_length = I64C(1000000) *
-                p_enc->fmt_in.video.i_frame_rate_base /
-                p_enc->fmt_in.video.i_frame_rate;
             p_block->i_dts = p_block->i_pts = p_pict->date;
         }