X-Git-Url: http://git.osdn.jp/view?a=blobdiff_plain;f=libhb%2Fdecdca.c;h=4fe06613503ac4d98357295bc4881b9e75c572ca;hb=033e32de9c380f54c7d1362a3979da205ebc3a29;hp=0c905af106ca16ce00a5ee8459bc52b5d9406d65;hpb=1d9c122201261c9f3098a417ed140106e0d6ba0d;p=handbrake-jp%2Fhandbrake-jp-git.git

diff --git a/libhb/decdca.c b/libhb/decdca.c
index 0c905af1..4fe06613 100644
--- a/libhb/decdca.c
+++ b/libhb/decdca.c
@@ -14,6 +14,8 @@ struct hb_work_private_s
     /* libdca handle */
     dca_state_t * state;
 
+    double        next_pts;
+    int64_t       last_buf_pts;
     int           flags_in;
     int           flags_out;
     int           rate;
@@ -121,6 +123,13 @@ static int decdcaWork( hb_work_object_t * w, hb_buffer_t ** buf_in,
         return HB_WORK_DONE;
     }
 
+    if ( (*buf_in)->start < -1 && pv->next_pts == 0 )
+    {
+        // discard buffers that start before video time 0
+        *buf_out = NULL;
+        return HB_WORK_OK;
+    }
+
     hb_list_add( pv->list, *buf_in );
     *buf_in = NULL;
 
@@ -144,8 +153,10 @@ static hb_buffer_t * Decode( hb_work_object_t * w )
 {
     hb_work_private_t * pv = w->private_data;
     hb_buffer_t * buf;
+    hb_audio_t  * audio = w->audio;
     int           i, j, k;
-    uint64_t      pts, pos;
+    int64_t       pts, pos;
+    uint64_t      upts, upos;
     int           num_blocks;
 
     /* Get a frame header if don't have one yet */
@@ -181,15 +192,53 @@ static hb_buffer_t * Decode( hb_work_object_t * w )
         }
     }
 
-    if( !pv->sync ||
-        hb_list_bytes( pv->list ) < pv->size )
+    if( !pv->sync || hb_list_bytes( pv->list ) < pv->size )
     {
         /* Need more data */
         return NULL;
     }
 
     /* Get the whole frame */
-    hb_list_getbytes( pv->list, pv->frame, pv->size, &pts, &pos );
+    hb_list_getbytes( pv->list, pv->frame, pv->size, &upts, &upos );
+    pts = (int64_t)upts;
+    pos = (int64_t)upos;
+
+    if ( pts != pv->last_buf_pts )
+    {
+        pv->last_buf_pts = pts;
+    }
+    else
+    {
+        // spec says that the PTS is the start time of the first frame
+        // that starts in the PES frame so we only use the PTS once then
+        // get the following frames' PTS from the frame length.
+        pts = -1;
+    }
+
+    // mkv files typically use a 1ms timebase which results in a lot of
+    // truncation error in their timestamps. Also, TSMuxer or something
+    // in the m2ts-to-mkv toolchain seems to take a very casual attitude
+    // about time - timestamps seem to randomly offset by ~40ms for a few
+    // seconds then recover. So, if the pts we got is within 50ms of the
+    // pts computed from the data stream, use the data stream pts.
+    if ( pts == -1 || ( pv->next_pts && fabs( pts - pv->next_pts ) < 50.*90. ) )
+    {
+        pts = pv->next_pts;
+    }
+
+    double frame_dur = (double)(pv->frame_length & ~0xFF) / (double)pv->rate * 90000.;
+
+    /* DCA passthrough: don't decode the DCA frame */
+    if( audio->config.out.codec == HB_ACODEC_DCA )
+    {
+        buf = hb_buffer_init( pv->size );
+        memcpy( buf->data, pv->frame, pv->size );
+        buf->start = pts;
+        pv->next_pts = pts + frame_dur;
+        buf->stop  = pv->next_pts;
+        pv->sync = 0;
+        return buf;
+    }
 
     /* Feed libdca */
     dca_frame( pv->state, pv->frame, &pv->flags_out, &pv->level, 0 );
@@ -198,9 +247,12 @@ static hb_buffer_t * Decode( hb_work_object_t * w )
     num_blocks = dca_blocks_num( pv->state );
 
     /* num_blocks blocks per frame, 256 samples per block, channelsused channels */
-    buf        = hb_buffer_init( num_blocks * 256 * pv->out_discrete_channels * sizeof( float ) );
-    buf->start = pts + ( pos / pv->size ) * num_blocks * 256 * 90000 / pv->rate;
-    buf->stop  = buf->start + num_blocks * 256 * 90000 / pv->rate;
+    int nsamp = num_blocks * 256;
+    buf = hb_buffer_init( nsamp * pv->out_discrete_channels * sizeof( float ) );
+
+    buf->start = pts;
+    pv->next_pts = pts + (double)nsamp / (double)pv->rate * 90000.;
+    buf->stop  = pv->next_pts;
 
     for( i = 0; i < num_blocks; i++ )
     {