+
+/*****************************************************************************
+ * GetAR: Get aspect ratio
+ *****************************************************************************/
+static void GetAR( decoder_t *p_dec )
+{
+ decoder_sys_t *p_sys = p_dec->p_sys;
+
+ /* Check whether the input gave a particular aspect ratio */
+ if( p_dec->fmt_in.video.i_aspect )
+ {
+ p_sys->i_aspect = p_dec->fmt_in.video.i_aspect;
+ if( p_sys->i_aspect <= AR_221_1_PICTURE )
+ switch( p_sys->i_aspect )
+ {
+ case AR_4_3_PICTURE:
+ p_sys->i_aspect = VOUT_ASPECT_FACTOR * 4 / 3;
+ p_sys->i_sar_num = p_sys->p_info->sequence->picture_height * 4;
+ p_sys->i_sar_den = p_sys->p_info->sequence->picture_width * 3;
+ break;
+ case AR_16_9_PICTURE:
+ p_sys->i_aspect = VOUT_ASPECT_FACTOR * 16 / 9;
+ p_sys->i_sar_num = p_sys->p_info->sequence->picture_height * 16;
+ p_sys->i_sar_den = p_sys->p_info->sequence->picture_width * 9;
+ break;
+ case AR_221_1_PICTURE:
+ p_sys->i_aspect = VOUT_ASPECT_FACTOR * 221 / 100;
+ p_sys->i_sar_num = p_sys->p_info->sequence->picture_height * 221;
+ p_sys->i_sar_den = p_sys->p_info->sequence->picture_width * 100;
+ break;
+ case AR_SQUARE_PICTURE:
+ p_sys->i_aspect = VOUT_ASPECT_FACTOR *
+ p_sys->p_info->sequence->picture_width /
+ p_sys->p_info->sequence->picture_height;
+ p_sys->i_sar_num = p_sys->i_sar_den = 1;
+ break;
+ }
+ }
+ else
+ {
+ /* Use the value provided in the MPEG sequence header */
+ if( p_sys->p_info->sequence->pixel_height > 0 )
+ {
+ p_sys->i_aspect =
+ ((uint64_t)p_sys->p_info->sequence->picture_width) *
+ p_sys->p_info->sequence->pixel_width *
+ VOUT_ASPECT_FACTOR /
+ p_sys->p_info->sequence->picture_height /
+ p_sys->p_info->sequence->pixel_height;
+ p_sys->i_sar_num = p_sys->p_info->sequence->pixel_width;
+ p_sys->i_sar_den = p_sys->p_info->sequence->pixel_height;
+ }
+ else
+ {
+ /* Invalid aspect, assume 4:3.
+ * This shouldn't happen and if it does it is a bug
+ * in libmpeg2 (likely triggered by an invalid stream) */
+ p_sys->i_aspect = VOUT_ASPECT_FACTOR * 4 / 3;
+ p_sys->i_sar_num = p_sys->p_info->sequence->picture_height * 4;
+ p_sys->i_sar_den = p_sys->p_info->sequence->picture_width * 3;
+ }
+ }
+
+ msg_Dbg( p_dec, "%dx%d (display %d,%d), aspect %d, sar %i:%i, %u.%03u fps",
+ p_sys->p_info->sequence->picture_width,
+ p_sys->p_info->sequence->picture_height,
+ p_sys->p_info->sequence->display_width,
+ p_sys->p_info->sequence->display_height,
+ p_sys->i_aspect, p_sys->i_sar_num, p_sys->i_sar_den,
+ (uint32_t)((uint64_t)1001000000 * 27 /
+ p_sys->p_info->sequence->frame_period / 1001),
+ (uint32_t)((uint64_t)1001000000 * 27 /
+ p_sys->p_info->sequence->frame_period % 1001) );
+}