aboutsummaryrefslogtreecommitdiffhomepage
path: root/libmpcodecs/vf_palette.c
blob: d0cb8fffb35bd9193e20252d2077ba55deb6db12 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <inttypes.h>

#include "../config.h"
#include "../mp_msg.h"

#include "img_format.h"
#include "mp_image.h"
#include "vf.h"

#include "../postproc/rgb2rgb.h"

//===========================================================================//

// commented out 16 and 15 bit output support, because the conversion
// routines are incorrrect.  they assume the palette to be of the same
// depth as the output, which is incorrect. --Joey

static unsigned int bgr_list[]={
    IMGFMT_BGR32,
    IMGFMT_BGR24,
//    IMGFMT_BGR16,
//    IMGFMT_BGR15,
    0
};
static unsigned int rgb_list[]={
    IMGFMT_RGB32,
    IMGFMT_RGB24,
//    IMGFMT_RGB16,
//    IMGFMT_RGB15,
    0
};

static unsigned int gray_pal[256];

static unsigned int find_best(struct vf_instance_s* vf, unsigned int fmt){
    unsigned int best=0;
    int ret;
    unsigned int* p;
    if(fmt==IMGFMT_BGR8) p=bgr_list;
    else if(fmt==IMGFMT_RGB8) p=rgb_list;
    else return 0;
    while(*p){
	ret=vf->next->query_format(vf->next,*p);
	mp_msg(MSGT_VFILTER,MSGL_DBG2,"[%s] query(%s) -> %d\n",vf->info->name,vo_format_name(*p),ret&3);
	if(ret&VFCAP_CSP_SUPPORTED_BY_HW){ best=*p; break;} // no conversion -> bingo!
	if(ret&VFCAP_CSP_SUPPORTED && !best) best=*p; // best with conversion
	++p;
    }
    return best;
}

//===========================================================================//

struct vf_priv_s {
    unsigned int fmt;
    int pal_msg;
};

static int config(struct vf_instance_s* vf,
        int width, int height, int d_width, int d_height,
	unsigned int flags, unsigned int outfmt){
    if (!vf->priv->fmt)
	vf->priv->fmt=find_best(vf,outfmt);
    if(!vf->priv->fmt){
	// no matching fmt, so force one...
	if(outfmt==IMGFMT_RGB8) vf->priv->fmt=IMGFMT_RGB32;
	else if(outfmt==IMGFMT_BGR8) vf->priv->fmt=IMGFMT_BGR32;
	else return 0;
    }
    return vf_next_config(vf,width,height,d_width,d_height,flags,vf->priv->fmt);
}

static int put_image(struct vf_instance_s* vf, mp_image_t *mpi){
    mp_image_t *dmpi;
    
    // hope we'll get DR buffer:
    dmpi=vf_get_image(vf->next,vf->priv->fmt,
	MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE,
	mpi->w, mpi->h);

    if (!mpi->planes[1])
    {
	if(!vf->priv->pal_msg){
	    mp_msg(MSGT_VFILTER,MSGL_V,"[%s] no palette given, assuming builtin grayscale one\n",vf->info->name);
	    vf->priv->pal_msg=1;
	}
	mpi->planes[1] = (unsigned char*)gray_pal;
    }

    if(mpi->w==mpi->stride[0] && dmpi->w*(dmpi->bpp>>3)==dmpi->stride[0]){
	// no stride conversion needed
	switch(dmpi->imgfmt&255){
	case 15:
	    if (dmpi->flags & MP_IMGFLAG_SWAPPED)
		palette8tobgr15(mpi->planes[0],dmpi->planes[0],mpi->h*mpi->w,mpi->planes[1]);
	    else
		palette8torgb15(mpi->planes[0],dmpi->planes[0],mpi->h*mpi->w,mpi->planes[1]);
	    break;
	case 16:
	    if (dmpi->flags & MP_IMGFLAG_SWAPPED)
		palette8tobgr16(mpi->planes[0],dmpi->planes[0],mpi->h*mpi->w,mpi->planes[1]);
	    else
		palette8torgb16(mpi->planes[0],dmpi->planes[0],mpi->h*mpi->w,mpi->planes[1]);
	    break;
	case 24:
	    if (dmpi->flags & MP_IMGFLAG_SWAPPED)
		palette8tobgr24(mpi->planes[0],dmpi->planes[0],mpi->h*mpi->w,mpi->planes[1]);
	    else
		palette8torgb24(mpi->planes[0],dmpi->planes[0],mpi->h*mpi->w,mpi->planes[1]);
	    break;
	case 32:
	    if (dmpi->flags & MP_IMGFLAG_SWAPPED)
		palette8tobgr32(mpi->planes[0],dmpi->planes[0],mpi->h*mpi->w,mpi->planes[1]);
	    else
		palette8torgb32(mpi->planes[0],dmpi->planes[0],mpi->h*mpi->w,mpi->planes[1]);
	    break;
	}
    } else {
	int y;
	for(y=0;y<mpi->h;y++){
	    unsigned char* src=mpi->planes[0]+y*mpi->stride[0];
	    unsigned char* dst=dmpi->planes[0]+y*dmpi->stride[0];
	    switch(dmpi->imgfmt&255){
	    case 15:
		if (dmpi->flags & MP_IMGFLAG_SWAPPED)
		    palette8tobgr15(src,dst,mpi->w,mpi->planes[1]);
		else
		    palette8torgb15(src,dst,mpi->w,mpi->planes[1]);
		break;
	    case 16:
		if (dmpi->flags & MP_IMGFLAG_SWAPPED)
		    palette8tobgr16(src,dst,mpi->w,mpi->planes[1]);
		else
		    palette8torgb16(src,dst,mpi->w,mpi->planes[1]);
		break;
	    case 24:
		if (dmpi->flags & MP_IMGFLAG_SWAPPED)
		    palette8tobgr24(src,dst,mpi->w,mpi->planes[1]);
		else
		    palette8torgb24(src,dst,mpi->w,mpi->planes[1]);
		break;
	    case 32:
		if (dmpi->flags & MP_IMGFLAG_SWAPPED)
		    palette8tobgr32(src,dst,mpi->w,mpi->planes[1]);
		else
		    palette8torgb32(src,dst,mpi->w,mpi->planes[1]);
		break;
	    }
	}
    }
    
    return vf_next_put_image(vf,dmpi);
}

//===========================================================================//

static int query_format(struct vf_instance_s* vf, unsigned int fmt){
    int best=find_best(vf,fmt);
    if(!best) return 0; // no match
    return vf->next->query_format(vf->next,best);
}

static int open(vf_instance_t *vf, char* args){
    unsigned int i;
    vf->config=config;
    vf->put_image=put_image;
    vf->query_format=query_format;
    vf->priv=malloc(sizeof(struct vf_priv_s));
    memset(vf->priv, 0, sizeof(struct vf_priv_s));
    for(i=0;i<256;i++) gray_pal[i]=0x01010101*i;
    if (args)
    {
	if (!strcasecmp(args,"rgb15")) vf->priv->fmt=IMGFMT_RGB15; else
	if (!strcasecmp(args,"rgb16")) vf->priv->fmt=IMGFMT_RGB16; else
	if (!strcasecmp(args,"rgb24")) vf->priv->fmt=IMGFMT_RGB24; else
	if (!strcasecmp(args,"rgb32")) vf->priv->fmt=IMGFMT_RGB32; else
	if (!strcasecmp(args,"bgr15")) vf->priv->fmt=IMGFMT_BGR15; else
	if (!strcasecmp(args,"bgr16")) vf->priv->fmt=IMGFMT_BGR16; else
	if (!strcasecmp(args,"bgr24")) vf->priv->fmt=IMGFMT_BGR24; else
	if (!strcasecmp(args,"bgr32")) vf->priv->fmt=IMGFMT_BGR32; else
	{
	    printf("Unknown forced format name: '%s'\n", args);
	    return(0);
	}
    }
    return 1;
}

vf_info_t vf_info_palette = {
    "8bpp indexed (using palette) -> BGR 15/16/24/32 conversion",
    "palette",
    "A'rpi & Alex",
    "",
    open,
    NULL
};

//===========================================================================//