Sync with GomGom's patch-12 version.

updated copyright
  two new postprocessing options
  display aspect ratio support


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@13653 b3059339-0415-0410-9bf9-f77b7e298cf2

libmpcodecs/vd_xvid4.c

@@ -1,9 +1,9 @@
 /*****************************************************************************
  *
- *  - XviD 1.0 decoder module for mplayer/mencoder -
+ *  - XviD 1.x decoder module for mplayer/mencoder -
  *
- *  Copyright(C) 2003 Marco Belli <elcabesa@inwind.it>
+ *  Copyright(C) 2003      Marco Belli <elcabesa@inwind.it>
- *               2003 Edouard Gomez <ed.gomez@free.fr>
+ *               2003-2004 Edouard Gomez <ed.gomez@free.fr>
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
@@ -46,6 +46,8 @@ static int do_dr2 = 1;
 static int filmeffect = 0;
 static int lumadeblock = 0;
 static int chromadeblock = 0;
+static int lumadering = 0;
+static int chromadering = 0;
 
 m_option_t xvid_dec_opts[] = {
 	{ "dr2", &do_dr2, CONF_TYPE_FLAG, 0, 0, 1, NULL},
@@ -53,6 +55,8 @@ m_option_t xvid_dec_opts[] = {
 	{ "filmeffect", &filmeffect, CONF_TYPE_FLAG, 0, 0, 1, NULL},
 	{ "deblock-luma", &lumadeblock, CONF_TYPE_FLAG, 0, 0, 1, NULL},
 	{ "deblock-chroma", &chromadeblock, CONF_TYPE_FLAG, 0, 0, 1, NULL},
+	{ "dering-luma", &lumadering, CONF_TYPE_FLAG, 0, 0, 1, NULL},
+	{ "dering-chroma", &chromadering, CONF_TYPE_FLAG, 0, 0, 1, NULL},
 	{NULL, NULL, 0, 0, 0, 0, NULL}
 };
 
@@ -65,8 +69,15 @@ typedef struct {
 	unsigned char img_type;
 	void* hdl;
 	mp_image_t* mpi;
+	int vo_initialized;
 } priv_t;
 
+/*****************************************************************************
+ * Module function helpers
+ ****************************************************************************/
+
+static float stats2aspect(xvid_dec_stats_t *stats);
+
 /*****************************************************************************
  * Video decoder API function definitions
  ****************************************************************************/
@@ -86,18 +97,21 @@ static int control(sh_video_t *sh,int cmd,void* arg,...)
 
 static int init(sh_video_t *sh)
 {
+	xvid_gbl_info_t xvid_gbl_info;
 	xvid_gbl_init_t xvid_ini;
 	xvid_dec_create_t dec_p;
 	priv_t* p;
 	int cs;
 
+	memset(&xvid_gbl_info, 0, sizeof(xvid_gbl_info_t));
+	xvid_gbl_info.version = XVID_VERSION;
+	
 	memset(&xvid_ini, 0, sizeof(xvid_gbl_init_t));
 	xvid_ini.version = XVID_VERSION;
+	
 	memset(&dec_p, 0, sizeof(xvid_dec_create_t));
 	dec_p.version = XVID_VERSION;
 
-	if(!mpcodecs_config_vo(sh, sh->disp_w, sh->disp_h, IMGFMT_YV12))
-		return(0);
 
 	switch(sh->codec->outfmt[sh->outfmtidx]){
 	case IMGFMT_YV12:
@@ -135,12 +149,28 @@ static int init(sh_video_t *sh)
 		return(0);
 	}
 
+	/* Gather some information about the host library */
+	if(xvid_global(NULL, XVID_GBL_INFO, &xvid_gbl_info, NULL) < 0) {
+		mp_msg(MSGT_MENCODER,MSGL_INFO, "xvid: could not get information about the library\n");
+	} else {
+		mp_msg(MSGT_MENCODER,MSGL_INFO, "xvid: using library version %d.%d.%d (build %s)\n",
+		       XVID_VERSION_MAJOR(xvid_gbl_info.actual_version),
+		       XVID_VERSION_MINOR(xvid_gbl_info.actual_version),
+		       XVID_VERSION_PATCH(xvid_gbl_info.actual_version),
+		       xvid_gbl_info.build);
+	}
+	
+	/* Initialize the xvidcore library */
 	if(xvid_global(NULL, XVID_GBL_INIT, &xvid_ini, NULL))
 		return(0);
 
-	dec_p.width = sh->disp_w;
+	/* We use 0 width and height so xvidcore will resize its buffers
-	dec_p.height =  sh->disp_h;
+	 * if required. That allows this vd plugin to do resize on first
+	 * VOL encountered (don't trust containers' width and height) */
+	dec_p.width = 0;
+	dec_p.height =  0;
 
+	/* Get a decoder instance */
 	if(xvid_decore(0, XVID_DEC_CREATE, &dec_p, NULL)<0) {
 		mp_msg(MSGT_DECVIDEO, MSGL_ERR, "XviD init failed\n");
 		return(0);
@@ -149,6 +179,7 @@ static int init(sh_video_t *sh)
 	p = (priv_t*)malloc(sizeof(priv_t));
 	p->cs = cs;
 	p->hdl = dec_p.handle;
+	p->vo_initialized = 0;
 	sh->context = p;
 
 	switch(cs) {
@@ -185,44 +216,90 @@ static void uninit(sh_video_t *sh){
 static mp_image_t* decode(sh_video_t *sh, void* data, int len, int flags)
 {
 	xvid_dec_frame_t dec;
+	xvid_dec_stats_t stats;
+	mp_image_t* mpi = NULL;
+
 	priv_t* p = sh->context;
 
-	mp_image_t* mpi = mpcodecs_get_image(sh, p->img_type,
-					     MP_IMGFLAG_ACCEPT_STRIDE,
-					     sh->disp_w,sh->disp_h);
 
-	if(!data || !mpi || len <= 0)
+	if(!data || len <= 0)
 		return(NULL);
 
 	memset(&dec,0,sizeof(xvid_dec_frame_t));
+	memset(&stats, 0, sizeof(xvid_dec_stats_t));
 	dec.version = XVID_VERSION;
+	stats.version = XVID_VERSION;
 
 	dec.bitstream = data;
 	dec.length = len;
 
-	dec.general |= XVID_LOWDELAY 
+	dec.general |= XVID_LOWDELAY
+	/* XXX: if lowdelay is unset, and xvidcore internal buffers are
+	 *      used => crash. MUST FIX */
 	        | (filmeffect ? XVID_FILMEFFECT : 0 )
 	        | (lumadeblock ? XVID_DEBLOCKY : 0 )
 	        | (chromadeblock ? XVID_DEBLOCKUV : 0 );
-
+#if XVID_API >= XVID_MAKE_API(4,1)
+	dec.general |= (lumadering ? XVID_DEBLOCKY|XVID_DERINGY : 0 );
+	dec.general |= (chromadering ? XVID_DEBLOCKUV|XVID_DERINGUV : 0 );
+#endif
 	dec.output.csp = p->cs;   
 
-	if(p->cs != XVID_CSP_INTERNAL) {
+	/* Decoding loop because xvidcore may return VOL information for
-		dec.output.plane[0] = mpi->planes[0];
+	 * on the fly buffer resizing. In that case we must decode VOL,
-		dec.output.plane[1] = mpi->planes[1];
+	 * init VO, then decode the frame */
-		dec.output.plane[2] = mpi->planes[2];
+	do {
+		int consumed;
 
-		dec.output.stride[0] = mpi->stride[0]; 
+		/* If we don't know frame size yet, don't even try to request
-		dec.output.stride[1] = mpi->stride[1]; 
+		 * a buffer, we must loop until we find a VOL, so VO plugin
-		dec.output.stride[2] = mpi->stride[2];
+		 * is initialized and we can obviously output something */
-	}
+		if (p->vo_initialized) {
+			mpi = mpcodecs_get_image(sh, p->img_type,
+					MP_IMGFLAG_ACCEPT_STRIDE,
+					sh->disp_w, sh->disp_h);
+			
+			if(p->cs != XVID_CSP_INTERNAL) {
+				dec.output.plane[0] = mpi->planes[0];
+				dec.output.plane[1] = mpi->planes[1];
+				dec.output.plane[2] = mpi->planes[2];
 
-	if(xvid_decore(p->hdl, XVID_DEC_DECODE, &dec, NULL) < 0) {
+				dec.output.stride[0] = mpi->stride[0]; 
-		mp_msg(MSGT_DECVIDEO, MSGL_ERR, "Decoding error\n");
+				dec.output.stride[1] = mpi->stride[1]; 
-		return(NULL);
+				dec.output.stride[2] = mpi->stride[2];
-	}
+			}
+		}
+		
+		/* Decode data */
+		consumed = xvid_decore(p->hdl, XVID_DEC_DECODE, &dec, &stats);
+		if (consumed < 0) {
+			mp_msg(MSGT_DECVIDEO, MSGL_ERR, "Decoding error\n");
+			return(NULL);
+		}
 
-	if(p->cs == XVID_CSP_INTERNAL) {
+		/* Found a VOL information stats, if VO plugin is not initialized
+		 * yet then do it now */
+		if (stats.type == XVID_TYPE_VOL && !p->vo_initialized) {
+			sh->aspect = stats2aspect(&stats);
+			if(!mpcodecs_config_vo(sh, stats.data.vol.width, stats.data.vol.height, IMGFMT_YV12))
+				return(NULL);
+			
+			/* Don't take this path twice */
+			p->vo_initialized = !p->vo_initialized;
+		}
+
+		/* Don't forget to update buffer position and buffer length */
+		dec.bitstream += consumed;
+		dec.length -= consumed;
+	} while ((stats.type == XVID_TYPE_VOL || stats.type == XVID_TYPE_NOTHING) && dec.length > 0);
+
+	/* There are two ways to get out of the decoding loop:
+	 *  - a frame has been returned
+	 *  - no more data in buffer and no frames returned */
+	
+	/* If mpi is NULL, it proves nothing has been returned by the decoder
+	 * so don't try to display internal buffers. */
+	if (mpi != NULL && p->cs == XVID_CSP_INTERNAL) {
 		mpi->planes[0] = dec.output.plane[0];
 		mpi->planes[1] = dec.output.plane[1];
 		mpi->planes[2] = dec.output.plane[2];
@@ -232,7 +309,71 @@ static mp_image_t* decode(sh_video_t *sh, void* data, int len, int flags)
 		mpi->stride[2] = dec.output.stride[2];
 	}
 
-	return(mpi);
+	/* If we got out the decoding loop because the buffer was empty and there was nothing
+	 * to output yet, then just return NULL */
+	return((stats.type == XVID_TYPE_NOTHING)? NULL: mpi);
+}
+
+/*****************************************************************************
+ * Helper functions
+ ****************************************************************************/
+
+/* Returns DAR value according to VOL's informations contained in stats
+ * param */
+static float stats2aspect(xvid_dec_stats_t *stats)
+{
+	if (stats->type == XVID_TYPE_VOL) {
+		float wpar;
+		float hpar;
+		float dar;
+	
+		/* MPEG4 strem stores PAR (Pixel Aspect Ratio), mplayer uses
+		 * DAR (Display Aspect Ratio)
+		 * 
+		 * Both are related thanks to the equation:
+		 *            width 
+		 *      DAR = ----- x PAR
+		 *            height
+		 *
+		 * As MPEG4 is so well designed (*cough*), VOL header carries
+		 * both informations together -- lucky eh ? */
+
+		switch (stats->data.vol.par) {
+		case XVID_PAR_11_VGA: /* 1:1 vga (square), default if supplied PAR is not a valid value */
+			wpar = hpar = 1.0f;
+			break;
+		case XVID_PAR_43_PAL: /* 4:3 pal (12:11 625-line) */
+			wpar = 12;
+			hpar = 11;
+			break;
+		case XVID_PAR_43_NTSC: /* 4:3 ntsc (10:11 525-line) */
+			wpar = 10;
+			hpar = 11;
+			break;
+		case XVID_PAR_169_PAL: /* 16:9 pal (16:11 625-line) */
+			wpar = 16;
+			hpar = 11;
+			break;
+		case XVID_PAR_169_NTSC: /* 16:9 ntsc (40:33 525-line) */
+			wpar = 40;
+			hpar = 33;
+			break;
+		case XVID_PAR_EXT: /* extended par; use par_width, par_height */
+			wpar = stats->data.vol.par_width;
+			hpar = stats->data.vol.par_height;
+			break;
+		default:
+			wpar = hpar = 1.0f;
+			break;
+		}
+
+		dar  = ((float)stats->data.vol.width*wpar);
+		dar /= ((float)stats->data.vol.height*hpar);
+
+		return(dar);
+	}
+
+	return(0.0f);
 }
 
 /*****************************************************************************