diff options
Diffstat (limited to 'libhb/render.c')
| -rw-r--r-- | libhb/render.c | 145 |
1 files changed, 111 insertions, 34 deletions
diff --git a/libhb/render.c b/libhb/render.c index 3a0a02572..24a3d504e 100644 --- a/libhb/render.c +++ b/libhb/render.c @@ -20,11 +20,15 @@ struct hb_work_private_s hb_buffer_t * buf_scale; hb_fifo_t * subtitle_queue; hb_fifo_t * delay_queue; - int frames_to_extend; int dropped_frames; int extended_frames; uint64_t last_start[4]; uint64_t last_stop[4]; + uint64_t lost_time[4]; + uint64_t total_lost_time; + uint64_t total_gained_time; + int64_t chapter_time; + int chapter_val; }; int renderInit( hb_work_object_t *, hb_job_t * ); @@ -233,7 +237,15 @@ int renderWork( hb_work_object_t * w, hb_buffer_t ** buf_in, { hb_fifo_push( pv->subtitle_queue, hb_buffer_init(0) ); } - + + /* If there's a chapter mark remember it in case we delay or drop its frame */ + if( in->new_chap ) + { + pv->chapter_time = in->start; + pv->chapter_val = in->new_chap; + in->new_chap = 0; + } + /* Setup render buffer */ hb_buffer_t * buf_render = hb_buffer_init( 3 * job->width * job->height / 2 ); @@ -280,9 +292,22 @@ int renderWork( hb_work_object_t * w, hb_buffer_t ** buf_in, { if( job->vfr ) { - pv->frames_to_extend += 4; + /* We need to compensate for the time lost by dropping this frame. + Spread its duration out in quarters, because usually dropped frames + maintain a 1-out-of-5 pattern and this spreads it out amongst the remaining ones. + Store these in the lost_time array, which has 4 slots in it. + Because not every frame duration divides evenly by 4, and we can't lose the + remainder, we have to go through an awkward process to preserve it in the 4th array index. */ + uint64_t temp_duration = buf_tmp_out->stop - buf_tmp_out->start; + pv->lost_time[0] += (temp_duration / 4); + pv->lost_time[1] += (temp_duration / 4); + pv->lost_time[2] += (temp_duration / 4); + pv->lost_time[3] += ( temp_duration - (temp_duration / 4) - (temp_duration / 4) - (temp_duration / 4) ); + + pv->total_lost_time += temp_duration; pv->dropped_frames++; - hb_fifo_get( pv->subtitle_queue ); + + hb_fifo_get( pv->subtitle_queue ); buf_tmp_in = NULL; } else @@ -304,8 +329,11 @@ int renderWork( hb_work_object_t * w, hb_buffer_t ** buf_in, pv->last_start[i] = pv->last_start[i-1]; pv->last_stop[i] = pv->last_stop[i-1]; } - pv->last_start[0] = in->start; - pv->last_stop[0] = in->stop; + + /* In order to make sure we have continuous time stamps, store + the current frame's duration as starting when the last one stopped. */ + pv->last_start[0] = pv->last_stop[1]; + pv->last_stop[0] = pv->last_start[0] + (in->stop - in->start); } /* Apply subtitles */ @@ -385,13 +413,17 @@ int renderWork( hb_work_object_t * w, hb_buffer_t ** buf_in, if( *buf_out ) { - if( pv->frames_to_extend ) + /* The current frame exists. That means it hasn't been dropped by a filter. + Make it accessible as ivtc_buffer so we can edit its duration if needed. */ + ivtc_buffer = *buf_out; + + if( pv->lost_time[3] > 0 ) { /* - * A frame's been dropped by VFR detelecine. + * A frame's been dropped earlier by VFR detelecine. * Gotta make up the lost time. This will also - * slow down the video to 23.976fps. - * The dropped frame ran for 3003 ticks, so + * slow down the video. + * The dropped frame's has to be accounted for, so * divvy it up amongst the 4 frames left behind. * This is what the delay_queue is for; * telecined sequences start 2 frames before @@ -399,29 +431,62 @@ int renderWork( hb_work_object_t * w, hb_buffer_t ** buf_in, * ones you need a 2 frame delay between * reading input and writing output. */ - ivtc_buffer = *buf_out; + + /* We want to extend the outputted frame's duration by the value + stored in the 4th slot of the lost_time array. Because we need + to adjust all the values in the array so they're contiguous, + extend the duration inside the array first, before applying + it to the current frame buffer. */ + pv->last_stop[3] += pv->lost_time[3]; - /* The 4th cached frame will be the to use. */ - ivtc_buffer->start = pv->last_start[3]; - ivtc_buffer->stop = pv->last_stop[3]; - - if (pv->frames_to_extend % 4) - ivtc_buffer->stop += 751; - else - ivtc_buffer->stop += 750; + /* Log how much time has been added back in to the video. */ + pv->total_gained_time += pv->lost_time[3]; - /* Set the 3rd cached frame to start when this one stops, - and to stop 3003 ticks later -- a normal 29.97fps - length frame. If it needs to be extended as well to - make up lost time, it'll be handled on the next - loop through the renderer. */ - int temp_duration = pv->last_stop[2] - pv->last_start[2]; - pv->last_start[2] = ivtc_buffer->stop; - pv->last_stop[2] = ivtc_buffer->stop + temp_duration; + /* We've pulled the 4th value from the lost_time array + and added it to the last_stop array's 4th slot. Now, rotate the + lost_time array so the 4th slot now holds the 3rd's value, and + so on down the line, and set the 0 index to a value of 0. */ + int i; + for( i=2; i >= 0; i--) + { + pv->lost_time[i+1] = pv->lost_time[i]; + } + pv->lost_time[0] = 0; - pv->frames_to_extend--; + /* Log how many frames have had their durations extended. */ pv->extended_frames++; } + + /* We can't use the given time stamps. Previous frames + might already have been extended, throwing off the + raw values fed to render.c. Instead, their + stop and start times are stored in arrays. + The 4th cached frame will be the to use. + If it needed its duration extended to make up + lost time, it will have happened above. */ + ivtc_buffer->start = pv->last_start[3]; + ivtc_buffer->stop = pv->last_stop[3]; + + /* Set the 3rd cached frame to start when this one stops, + and so on down the line. If any of them need to be + extended as well to make up lost time, it'll be handled + on the next loop through the renderer. */ + int i; + for (i = 2; i >= 0; i--) + { + int temp_duration = pv->last_stop[i] - pv->last_start[i]; + pv->last_start[i] = pv->last_stop[i+1]; + pv->last_stop[i] = pv->last_start[i] + temp_duration; + } + + /* If we have a pending chapter mark and this frame is at + or after the time of the mark, mark this frame & clear + our pending mark. */ + if( pv->chapter_time && pv->chapter_time <= ivtc_buffer->start ) + { + ivtc_buffer->new_chap = pv->chapter_val; + pv->chapter_time = 0; + } } @@ -431,11 +496,12 @@ int renderWork( hb_work_object_t * w, hb_buffer_t ** buf_in, void renderClose( hb_work_object_t * w ) { hb_work_private_t * pv = w->private_data; - - hb_log("render: dropped frames: %i (%i ticks)", pv->dropped_frames, (pv->dropped_frames * 3003) ); - hb_log("render: extended frames: %i (%i ticks)", pv->extended_frames, ( ( pv->extended_frames / 4 ) * 3003 ) ); - hb_log("render: Lost time: %i frames (%i ticks)", (pv->dropped_frames * 4) - (pv->extended_frames), (pv->dropped_frames * 3003) - ( ( pv->extended_frames / 4 ) * 3003 ) ); + hb_log("render: lost time: %lld (%i frames)", pv->total_lost_time, pv->dropped_frames); + hb_log("render: gained time: %lld (%i frames) (%lld not accounted for)", pv->total_gained_time, pv->extended_frames, pv->total_lost_time - pv->total_gained_time); + if (pv->dropped_frames) + hb_log("render: average dropped frame duration: %lld", (pv->total_lost_time / pv->dropped_frames) ); + /* Cleanup subtitle queue */ if( pv->subtitle_queue ) { @@ -476,12 +542,23 @@ int renderInit( hb_work_object_t * w, hb_job_t * job ) /* Setup FIFO queue for subtitle cache */ pv->subtitle_queue = hb_fifo_init( 8 ); pv->delay_queue = hb_fifo_init( 8 ); - pv->frames_to_extend = 0; + + /* VFR IVTC needs a bunch of time-keeping variables to track + how many frames are dropped, how many are extended, what the + last 4 start and stop times were (so they can be modified), + how much time has been lost and gained overall, how much time + the latest 4 frames should be extended by, and where chapter + markers are (so they can be saved if their frames are dropped.) */ pv->dropped_frames = 0; pv->extended_frames = 0; pv->last_start[0] = 0; pv->last_stop[0] = 0; - + pv->total_lost_time = 0; + pv->total_gained_time = 0; + pv->lost_time[0] = 0; pv->lost_time[1] = 0; pv->lost_time[2] = 0; pv->lost_time[3] = 0; + pv->chapter_time = 0; + pv->chapter_val = 0; + /* Setup filters */ /* TODO: Move to work.c? */ if( job->filters ) |