/* $Id: decmpeg2.c,v 1.12 2005/03/03 16:30:42 titer Exp $
This file is part of the HandBrake source code.
- Homepage: <http://handbrake.m0k.org/>.
+ Homepage: <http://handbrake.fr/>.
It may be used under the terms of the GNU General Public License. */
#include "hb.h"
-
+#include "hbffmpeg.h"
#include "mpeg2dec/mpeg2.h"
/* Cadence tracking */
#define BTB_PROG 64
#define TB_PROG 128
#define TBT_PROG 256
-int cadence[12];
-int flag = 0;
/**********************************************************************
* hb_libmpeg2_t
- **********************************************************************
- * A convenient libmpeg wrapper, used both here and in scan.c
*********************************************************************/
-struct hb_libmpeg2_s
+typedef struct hb_libmpeg2_s
{
mpeg2dec_t * libmpeg2;
const mpeg2_info_t * info;
+ hb_job_t * job;
int width;
int height;
int rate;
- int aspect_ratio;
- int got_iframe;
- int look_for_break;
+ double aspect_ratio;
+ int got_iframe; /* set when we get our first iframe */
+ int look_for_iframe; /* need an iframe to add chap break */
+ int look_for_break; /* need gop start to add chap break */
+ uint32_t nframes; /* number of frames we've decoded */
int64_t last_pts;
-};
+ int cadence[12];
+ int flag;
+} hb_libmpeg2_t;
/**********************************************************************
* hb_libmpeg2_init
**********************************************************************
*
*********************************************************************/
-hb_libmpeg2_t * hb_libmpeg2_init()
+static hb_libmpeg2_t * hb_libmpeg2_init()
{
hb_libmpeg2_t * m = calloc( sizeof( hb_libmpeg2_t ), 1 );
m->libmpeg2 = mpeg2_init();
m->info = mpeg2_info( m->libmpeg2 );
m->last_pts = -1;
- m->look_for_break = 0;
return m;
}
+static hb_buffer_t *hb_copy_frame( hb_job_t *job, int width, int height,
+ uint8_t* y, uint8_t *u, uint8_t *v )
+{
+ int dst_w = width, dst_h = height;
+ if ( job )
+ {
+ dst_w = job->title->width;
+ dst_h = job->title->height;
+ }
+ int dst_wh = dst_w * dst_h;
+ hb_buffer_t *buf = hb_video_buffer_init( dst_w, dst_h );
+
+ if ( dst_w != width || dst_h != height )
+ {
+ // we're encoding and the frame dimensions don't match the title dimensions -
+ // rescale & matte Y, U, V into our output buf.
+ AVPicture in, out;
+ avpicture_alloc(&in, PIX_FMT_YUV420P, width, height );
+ avpicture_alloc(&out, PIX_FMT_YUV420P, dst_w, dst_h );
+
+ int src_wh = width * height;
+ memcpy( in.data[0], y, src_wh );
+ memcpy( in.data[1], u, src_wh >> 2 );
+ memcpy( in.data[2], v, src_wh >> 2 );
+ struct SwsContext *context = sws_getContext( width, height, PIX_FMT_YUV420P,
+ dst_w, dst_h, PIX_FMT_YUV420P,
+ SWS_LANCZOS|SWS_ACCURATE_RND,
+ NULL, NULL, NULL );
+ sws_scale( context, in.data, in.linesize, 0, height, out.data, out.linesize );
+ sws_freeContext( context );
+
+ uint8_t *data = buf->data;
+ memcpy( data, out.data[0], dst_wh );
+ data += dst_wh;
+ // U & V planes are 1/4 the size of Y plane.
+ dst_wh >>= 2;
+ memcpy( data, out.data[1], dst_wh );
+ data += dst_wh;
+ memcpy( data, out.data[2], dst_wh );
+
+ avpicture_free( &out );
+ avpicture_free( &in );
+ }
+ else
+ {
+ // we're scanning or the frame dimensions match the title's dimensions
+ // so we can do a straight copy.
+ uint8_t *data = buf->data;
+ memcpy( data, y, dst_wh );
+ data += dst_wh;
+ // U & V planes are 1/4 the size of Y plane.
+ dst_wh >>= 2;
+ memcpy( data, u, dst_wh );
+ data += dst_wh;
+ memcpy( data, v, dst_wh );
+ }
+ return buf;
+}
+
/**********************************************************************
* hb_libmpeg2_decode
**********************************************************************
*
*********************************************************************/
-int hb_libmpeg2_decode( hb_libmpeg2_t * m, hb_buffer_t * buf_es,
+static int hb_libmpeg2_decode( hb_libmpeg2_t * m, hb_buffer_t * buf_es,
hb_list_t * list_raw )
{
mpeg2_state_t state;
hb_buffer_t * buf;
- uint8_t * data;
- int chap_break = 0;
- /* Feed libmpeg2 */
- if( buf_es->start > -1 )
+ if ( buf_es->size )
{
- mpeg2_tag_picture( m->libmpeg2, buf_es->start >> 32,
- buf_es->start & 0xFFFFFFFF );
+ /* Feed libmpeg2 */
+ if( buf_es->start > -1 )
+ {
+ mpeg2_tag_picture( m->libmpeg2, buf_es->start >> 32,
+ buf_es->start & 0xFFFFFFFF );
+ }
+ mpeg2_buffer( m->libmpeg2, buf_es->data,
+ buf_es->data + buf_es->size );
}
- mpeg2_buffer( m->libmpeg2, buf_es->data,
- buf_es->data + buf_es->size );
for( ;; )
{
* it keeps the pixel width & height that would cause
* the storage width & height to come out in the correct
* aspect ratio. Convert these back to aspect ratio.
- * We do the calc in floating point to get the rounding right.
- * We round in the second decimal digit because we scale
- * the (integer) aspect by 9 to preserve the 1st digit.
*/
double ar_numer = m->width * m->info->sequence->pixel_width;
double ar_denom = m->height * m->info->sequence->pixel_height;
- m->aspect_ratio = ( ar_numer / ar_denom + .05 ) * HB_ASPECT_BASE;
+ m->aspect_ratio = ar_numer / ar_denom;
}
}
}
- else if( state == STATE_GOP && m->look_for_break == 2)
+ else if( state == STATE_GOP && m->look_for_break)
{
- hb_log("MPEG2: Group of pictures found, searching for I-Frame");
- m->look_for_break = 1;
+ // we were looking for a gop to add a chapter break - we found it
+ // so now start looking for an iframe.
+ m->look_for_iframe = m->look_for_break;
+ m->look_for_break = 0;
}
else if( ( state == STATE_SLICE || state == STATE_END ) &&
m->info->display_fbuf )
if( ( m->info->display_picture->flags &
PIC_MASK_CODING_TYPE ) == PIC_FLAG_CODING_TYPE_I )
{
+ // we got an iframe so we can start decoding video now
m->got_iframe = 1;
-
- // If we are looking for a break, insert the chapter break on an I-Frame
- if( m->look_for_break == 1 )
- {
- hb_log("MPEG2: I-Frame Found");
- m->look_for_break = 0;
- chap_break = 1;
- }
}
if( m->got_iframe )
{
- buf = hb_buffer_init( m->width * m->height * 3 / 2 );
- data = buf->data;
-
+ buf = hb_copy_frame( m->job, m->info->sequence->width,
+ m->info->sequence->height,
+ m->info->display_fbuf->buf[0],
+ m->info->display_fbuf->buf[1],
+ m->info->display_fbuf->buf[2] );
buf->sequence = buf_es->sequence;
- // Was a good break point found?
- if( chap_break )
- {
- hb_log("MPEG2: Chapter Break Inserted");
- chap_break = 0;
- buf->new_chap = 1;
- }
-
- memcpy( data, m->info->display_fbuf->buf[0],
- m->width * m->height );
- data += m->width * m->height;
- memcpy( data, m->info->display_fbuf->buf[1],
- m->width * m->height / 4 );
- data += m->width * m->height / 4;
- memcpy( data, m->info->display_fbuf->buf[2],
- m->width * m->height / 4 );
-
if( m->info->display_picture->flags & PIC_FLAG_TAGS )
{
buf->start =
( (uint64_t) m->info->display_picture->tag << 32 ) |
( (uint64_t) m->info->display_picture->tag2 );
- /*
- * Add back in again to track PTS of MPEG2 frames
- * hb_log("MPEG2: Normal buf->start = %lld", buf->start);
- */
}
else if( m->last_pts > -1 )
{
}
m->last_pts = buf->start;
- flag = m->info->display_picture->flags;
+ if( m->look_for_iframe && ( m->info->display_picture->flags &
+ PIC_MASK_CODING_TYPE ) == PIC_FLAG_CODING_TYPE_I )
+ {
+ // we were waiting for an iframe to insert a chapter mark
+ // and we have one.
+ buf->new_chap = m->look_for_iframe;
+ m->look_for_iframe = 0;
+ const char *chap_name = "";
+ if ( m->job && buf->new_chap > 0 &&
+ hb_list_item( m->job->title->list_chapter,
+ buf->new_chap - 1 ) )
+ {
+ hb_chapter_t * c = hb_list_item( m->job->title->list_chapter,
+ buf->new_chap - 1 );
+ chap_name = c->title;
+ }
+ hb_log( "mpeg2: \"%s\" (%d) at frame %u time %lld",
+ chap_name, buf->new_chap, m->nframes, buf->start );
+ } else if ( m->nframes == 0 && m->job &&
+ hb_list_item( m->job->title->list_chapter,
+ m->job->chapter_start - 1 ) )
+ {
+ hb_chapter_t * c = hb_list_item( m->job->title->list_chapter,
+ m->job->chapter_start - 1 );
+ hb_log( "mpeg2: \"%s\" (%d) at frame %u time %lld", c->title,
+ m->job->chapter_start, m->nframes, buf->start );
+ }
+ ++m->nframes;
+
+ m->flag = m->info->display_picture->flags;
/* Uncomment this block to see frame-by-frame picture flags, as the video encodes.
hb_log("***** MPEG 2 Picture Info for PTS %lld *****", buf->start);
- if( flag & TOP_FIRST )
+ if( m->flag & TOP_FIRST )
hb_log("MPEG2 Flag: Top field first");
- if( flag & PROGRESSIVE )
+ if( m->flag & PROGRESSIVE )
hb_log("MPEG2 Flag: Progressive");
- if( flag & COMPOSITE )
+ if( m->flag & COMPOSITE )
hb_log("MPEG2 Flag: Composite");
- if( flag & SKIP )
+ if( m->flag & SKIP )
hb_log("MPEG2 Flag: Skip!");
- if( flag & TAGS )
+ if( m->flag & TAGS )
hb_log("MPEG2 Flag: TAGS");
- if(flag & REPEAT_FIRST )
+ if(fm->lag & REPEAT_FIRST )
hb_log("MPEG2 Flag: Repeat first field");
- if( flag & COMPOSITE_MASK )
+ if( m->flag & COMPOSITE_MASK )
hb_log("MPEG2 Flag: Composite mask");
hb_log("fields: %d", m->info->display_picture->nb_fields);
*/
int i = 0;
for(i=11; i > 0; i--)
{
- cadence[i] = cadence[i-1];
+ m->cadence[i] = m->cadence[i-1];
}
- if ( !(flag & PROGRESSIVE) && !(flag & TOP_FIRST) )
+ if ( !(m->flag & PROGRESSIVE) && !(m->flag & TOP_FIRST) )
{
/* Not progressive, not top first...
That means it's probably bottom
first, 2 fields displayed.
*/
//hb_log("MPEG2 Flag: Bottom field first, 2 fields displayed.");
- cadence[0] = BT;
+ m->cadence[0] = BT;
}
- else if ( !(flag & PROGRESSIVE) && (flag & TOP_FIRST) )
+ else if ( !(m->flag & PROGRESSIVE) && (m->flag & TOP_FIRST) )
{
/* Not progressive, top is first,
Two fields displayed.
*/
//hb_log("MPEG2 Flag: Top field first, 2 fields displayed.");
- cadence[0] = TB;
+ m->cadence[0] = TB;
}
- else if ( (flag & PROGRESSIVE) && !(flag & TOP_FIRST) && !( flag & REPEAT_FIRST ) )
+ else if ( (m->flag & PROGRESSIVE) && !(m->flag & TOP_FIRST) && !( m->flag & REPEAT_FIRST ) )
{
/* Progressive, but noting else.
That means Bottom first,
2 fields displayed.
*/
//hb_log("MPEG2 Flag: Progressive. Bottom field first, 2 fields displayed.");
- cadence[0] = BT_PROG;
+ m->cadence[0] = BT_PROG;
}
- else if ( (flag & PROGRESSIVE) && !(flag & TOP_FIRST) && ( flag & REPEAT_FIRST ) )
+ else if ( (m->flag & PROGRESSIVE) && !(m->flag & TOP_FIRST) && ( m->flag & REPEAT_FIRST ) )
{
/* Progressive, and repeat. .
That means Bottom first,
3 fields displayed.
*/
//hb_log("MPEG2 Flag: Progressive repeat. Bottom field first, 3 fields displayed.");
- cadence[0] = BTB_PROG;
+ m->cadence[0] = BTB_PROG;
}
- else if ( (flag & PROGRESSIVE) && (flag & TOP_FIRST) && !( flag & REPEAT_FIRST ) )
+ else if ( (m->flag & PROGRESSIVE) && (m->flag & TOP_FIRST) && !( m->flag & REPEAT_FIRST ) )
{
/* Progressive, top first.
That means top first,
2 fields displayed.
*/
//hb_log("MPEG2 Flag: Progressive. Top field first, 2 fields displayed.");
- cadence[0] = TB_PROG;
+ m->cadence[0] = TB_PROG;
}
- else if ( (flag & PROGRESSIVE) && (flag & TOP_FIRST) && ( flag & REPEAT_FIRST ) )
+ else if ( (m->flag & PROGRESSIVE) && (m->flag & TOP_FIRST) && ( m->flag & REPEAT_FIRST ) )
{
/* Progressive, top, repeat.
That means top first,
3 fields displayed.
*/
//hb_log("MPEG2 Flag: Progressive repeat. Top field first, 3 fields displayed.");
- cadence[0] = TBT_PROG;
+ m->cadence[0] = TBT_PROG;
}
- if ( (cadence[2] <= TB) && (cadence[1] <= TB) && (cadence[0] > TB) && (cadence[11]) )
+ if ( (m->cadence[2] <= TB) && (m->cadence[1] <= TB) && (m->cadence[0] > TB) && (m->cadence[11]) )
hb_log("%fs: Video -> Film", (float)buf->start / 90000);
- if ( (cadence[2] > TB) && (cadence[1] <= TB) && (cadence[0] <= TB) && (cadence[11]) )
+ if ( (m->cadence[2] > TB) && (m->cadence[1] <= TB) && (m->cadence[0] <= TB) && (m->cadence[11]) )
hb_log("%fs: Film -> Video", (float)buf->start / 90000);
/* Store picture flags for later use by filters */
}
/**********************************************************************
- * hb_libmpeg2_info
- **********************************************************************
- *
- *********************************************************************/
-void hb_libmpeg2_info( hb_libmpeg2_t * m, int * width, int * height,
- int * rate, int *aspect_ratio )
-{
- *width = m->width;
- *height = m->height;
- if (m->info->display_fbuf)
- {
- if( (m->info->display_picture->flags & PROGRESSIVE) && (m->height == 480) )
- {
- /* The frame is progressive and it's NTSC DVD height, so change its FPS to 23.976.
- This might not be correct for the title. It's really just for scan.c's benefit.
- Scan.c will reset the fps to 29.97, until a simple majority of the preview
- frames report at 23.976.
- */
- //hb_log("Detecting NTSC Progressive Frame");
- m->rate = 1126125;
- }
- }
- *rate = m->rate;
- *aspect_ratio = m->aspect_ratio;
-}
-
-int hb_libmpeg2_clear_aspect_ratio( hb_libmpeg2_t * m )
-{
- int ar = m->aspect_ratio;
- m->aspect_ratio = 0;
- return ar;
-}
-
-/**********************************************************************
* hb_libmpeg2_close
**********************************************************************
*
*********************************************************************/
-void hb_libmpeg2_close( hb_libmpeg2_t ** _m )
+static void hb_libmpeg2_close( hb_libmpeg2_t ** _m )
{
hb_libmpeg2_t * m = *_m;
**********************************************************************
*
*********************************************************************/
-int decmpeg2Init( hb_work_object_t * w, hb_job_t * job )
+static int decmpeg2Init( hb_work_object_t * w, hb_job_t * job )
{
hb_work_private_t * pv;
pv->libmpeg2 = hb_libmpeg2_init();
pv->list = hb_list_init();
+ pv->libmpeg2->job = job;
+
return 0;
}
**********************************************************************
*
*********************************************************************/
-int decmpeg2Work( hb_work_object_t * w, hb_buffer_t ** buf_in,
+static int decmpeg2Work( hb_work_object_t * w, hb_buffer_t ** buf_in,
hb_buffer_t ** buf_out )
{
hb_work_private_t * pv = w->private_data;
hb_buffer_t * buf, * last = NULL;
+ int status = HB_WORK_OK;
// The reader found a chapter break, consume it completely, and remove it from the
// stream. We need to shift it.
if( (*buf_in)->new_chap )
{
- hb_log("MPEG2: Chapter Break Cell Found, searching for GOP");
- pv->libmpeg2->look_for_break = 2;
+ pv->libmpeg2->look_for_break = (*buf_in)->new_chap;
(*buf_in)->new_chap = 0;
}
hb_libmpeg2_decode( pv->libmpeg2, *buf_in, pv->list );
+ /* if we got an empty buffer signaling end-of-stream send it downstream */
+ if ( (*buf_in)->size == 0 )
+ {
+ hb_list_add( pv->list, *buf_in );
+ *buf_in = NULL;
+ status = HB_WORK_DONE;
+ }
+
*buf_out = NULL;
while( ( buf = hb_list_item( pv->list, 0 ) ) )
{
}
}
- return HB_WORK_OK;
+ return status;
}
/**********************************************************************
**********************************************************************
*
*********************************************************************/
-void decmpeg2Close( hb_work_object_t * w )
+static void decmpeg2Close( hb_work_object_t * w )
{
hb_work_private_t * pv = w->private_data;
+
+ // don't log during scan
+ if ( pv->libmpeg2->job )
+ {
+ hb_log( "mpeg2 done: %d frames", pv->libmpeg2->nframes );
+ }
hb_list_close( &pv->list );
hb_libmpeg2_close( &pv->libmpeg2 );
free( pv );
}
+static int decmpeg2Info( hb_work_object_t *w, hb_work_info_t *info )
+{
+ hb_work_private_t *pv = w->private_data;
+
+ memset( info, 0, sizeof(*info) );
+
+ if ( pv && pv->libmpeg2 && pv->libmpeg2->info && pv->libmpeg2->info->sequence )
+ {
+ hb_libmpeg2_t *m = pv->libmpeg2;
+
+ info->width = m->width;
+ info->height = m->height;
+ info->pixel_aspect_width = m->info->sequence->pixel_width;
+ info->pixel_aspect_height = m->info->sequence->pixel_height;
+ info->aspect = m->aspect_ratio;
+
+ // if the frame is progressive & NTSC DVD height report it as 23.976 FPS
+ // so that scan can autodetect NTSC film
+ info->rate = 27000000;
+ info->rate_base = ( m->info->display_fbuf && m->info->display_picture &&
+ (m->info->display_picture->flags & PROGRESSIVE) &&
+ (m->height == 480 ) ) ? 1126125 : m->rate;
+
+ info->bitrate = m->info->sequence->byte_rate * 8;
+ info->profile = m->info->sequence->profile_level_id >> 4;
+ info->level = m->info->sequence->profile_level_id & 0xf;
+ info->name = "mpeg2";
+ return 1;
+ }
+ return 0;
+}
+
hb_work_object_t hb_decmpeg2 =
{
WORK_DECMPEG2,
"MPEG-2 decoder (libmpeg2)",
decmpeg2Init,
decmpeg2Work,
- decmpeg2Close
+ decmpeg2Close,
+ decmpeg2Info
};
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