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Commit bb1a6786 authored by Gildas Bazin's avatar Gildas Bazin
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* modules/codec/libmpeg2.c: fixed aspect ratio when reading DVDs.
parent 9bfeef47
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Showing with 49 additions and 6 deletions
modules/codec/libmpeg2.c
View file @ bb1a6786
......@@ -2,7 +2,7 @@
* libmpeg2.c: mpeg2 video decoder module making use of libmpeg2.
*****************************************************************************
* Copyright (C) 1999-2001 VideoLAN
* $Id: libmpeg2.c,v 1.3 2003/03/20 21:45:01 gbazin Exp $
* $Id: libmpeg2.c,v 1.4 2003/03/25 23:06:49 gbazin Exp $
*
* Authors: Gildas Bazin <gbazin@netcourrier.com>
*
......@@ -34,6 +34,12 @@
#include <mpeg2dec/mpeg2.h>
/* Aspect ratio (ISO/IEC 13818-2 section 6.3.3, table 6-3) */
#define AR_SQUARE_PICTURE 1 /* square pixels */
#define AR_3_4_PICTURE 2 /* 3:4 picture (TV) */
#define AR_16_9_PICTURE 3 /* 16:9 picture (wide screen) */
#define AR_221_1_PICTURE 4 /* 2.21:1 picture (movie) */
/*****************************************************************************
* dec_thread_t : libmpeg2 decoder thread descriptor
*****************************************************************************/
......@@ -53,6 +59,7 @@ typedef struct dec_thread_t
mtime_t i_pts;
mtime_t i_previous_pts;
mtime_t i_current_pts;
mtime_t i_period_remainder;
/*
* Output properties
......@@ -122,6 +129,7 @@ static int RunDecoder( decoder_fifo_t *p_fifo )
p_dec->i_pts = mdate() + DEFAULT_PTS_DELAY;
p_dec->i_current_pts = 0;
p_dec->i_previous_pts = 0;
p_dec->i_period_remainder = 0;
/* Initialize decoder */
p_dec->p_mpeg2dec = mpeg2_init();
......@@ -175,10 +183,39 @@ static int RunDecoder( decoder_fifo_t *p_fifo )
case STATE_SEQUENCE:
/* Initialize video output */
/* Check whether the input gives a particular aspect ratio */
if( p_dec->p_fifo->p_demux_data
&& ( *(int*)(p_dec->p_fifo->p_demux_data) & 0x7 ) )
{
i_aspect = *(int*)(p_dec->p_fifo->p_demux_data);
switch( i_aspect )
{
case AR_3_4_PICTURE:
i_aspect = VOUT_ASPECT_FACTOR * 4 / 3;
break;
case AR_16_9_PICTURE:
i_aspect = VOUT_ASPECT_FACTOR * 16 / 9;
break;
case AR_221_1_PICTURE:
i_aspect = VOUT_ASPECT_FACTOR * 221 / 100;
break;
case AR_SQUARE_PICTURE:
default:
i_aspect = VOUT_ASPECT_FACTOR *
p_dec->p_info->sequence->width /
p_dec->p_info->sequence->height;
break;
}
}
else
{
/* Use the value provided in the MPEG sequence header */
i_aspect = ((uint64_t)p_dec->p_info->sequence->width) *
p_dec->p_info->sequence->pixel_width * VOUT_ASPECT_FACTOR /
p_dec->p_info->sequence->height /
p_dec->p_info->sequence->pixel_height;
}
i_chroma = VLC_FOURCC('Y','V','1','2');
......@@ -232,7 +269,13 @@ static int RunDecoder( decoder_fifo_t *p_fifo )
}
else
{
p_dec->i_pts += (p_dec->p_info->sequence->frame_period/27);
p_dec->i_pts += ( (p_dec->p_info->sequence->frame_period +
p_dec->i_period_remainder) / 27 );
p_dec->i_period_remainder =
p_dec->p_info->sequence->frame_period +
p_dec->i_period_remainder -
( p_dec->p_info->sequence->frame_period +
p_dec->i_period_remainder ) / 27 * 27;
}
vout_DatePicture( p_dec->p_vout, p_pic, p_dec->i_pts );
......
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