Statistics
| Branch: | Revision:

ffmpeg / libavfilter / vf_transpose.c @ 35fe66ab

History | View | Annotate | Download (7.58 KB)

1
/*
2
 * Copyright (c) 2010 Stefano Sabatini
3
 * Copyright (c) 2008 Vitor Sessak
4
 *
5
 * This file is part of FFmpeg.
6
 *
7
 * FFmpeg is free software; you can redistribute it and/or
8
 * modify it under the terms of the GNU Lesser General Public
9
 * License as published by the Free Software Foundation; either
10
 * version 2.1 of the License, or (at your option) any later version.
11
 *
12
 * FFmpeg is distributed in the hope that it will be useful,
13
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15
 * Lesser General Public License for more details.
16
 *
17
 * You should have received a copy of the GNU Lesser General Public
18
 * License along with FFmpeg; if not, write to the Free Software
19
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20
 */
21

    
22
/**
23
 * @file
24
 * transposition filter
25
 * Based on MPlayer libmpcodecs/vf_rotate.c.
26
 */
27

    
28
#include "libavutil/intreadwrite.h"
29
#include "libavutil/pixdesc.h"
30
#include "libavutil/imgutils.h"
31
#include "avfilter.h"
32

    
33
typedef struct {
34
    int hsub, vsub;
35
    int pixsteps[4];
36

    
37
    /* 0    Rotate by 90 degrees counterclockwise and vflip. */
38
    /* 1    Rotate by 90 degrees clockwise.                  */
39
    /* 2    Rotate by 90 degrees counterclockwise.           */
40
    /* 3    Rotate by 90 degrees clockwise and vflip.        */
41
    int dir;
42
} TransContext;
43

    
44
static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
45
{
46
    TransContext *trans = ctx->priv;
47
    trans->dir = 0;
48

    
49
    if (args)
50
        sscanf(args, "%d", &trans->dir);
51

    
52
    if (trans->dir < 0 || trans->dir > 3) {
53
        av_log(ctx, AV_LOG_ERROR, "Invalid value %d not between 0 and 3.\n",
54
               trans->dir);
55
        return AVERROR(EINVAL);
56
    }
57
    return 0;
58
}
59

    
60
static int query_formats(AVFilterContext *ctx)
61
{
62
    enum PixelFormat pix_fmts[] = {
63
        PIX_FMT_ARGB,         PIX_FMT_RGBA,
64
        PIX_FMT_ABGR,         PIX_FMT_BGRA,
65
        PIX_FMT_RGB24,        PIX_FMT_BGR24,
66
        PIX_FMT_RGB565BE,     PIX_FMT_RGB565LE,
67
        PIX_FMT_RGB555BE,     PIX_FMT_RGB555LE,
68
        PIX_FMT_BGR565BE,     PIX_FMT_BGR565LE,
69
        PIX_FMT_BGR555BE,     PIX_FMT_BGR555LE,
70
        PIX_FMT_GRAY16BE,     PIX_FMT_GRAY16LE,
71
        PIX_FMT_YUV420P16LE,  PIX_FMT_YUV420P16BE,
72
        PIX_FMT_YUV422P16LE,  PIX_FMT_YUV422P16BE,
73
        PIX_FMT_YUV444P16LE,  PIX_FMT_YUV444P16BE,
74
        PIX_FMT_NV12,         PIX_FMT_NV21,
75
        PIX_FMT_RGB8,         PIX_FMT_BGR8,
76
        PIX_FMT_RGB4_BYTE,    PIX_FMT_BGR4_BYTE,
77
        PIX_FMT_YUV444P,      PIX_FMT_YUV422P,
78
        PIX_FMT_YUV420P,      PIX_FMT_YUVJ420P,
79
        PIX_FMT_YUV411P,      PIX_FMT_YUV410P,
80
        PIX_FMT_YUVJ444P,     PIX_FMT_YUVJ422P,
81
        PIX_FMT_YUV440P,      PIX_FMT_YUVJ440P,
82
        PIX_FMT_YUVA420P,     PIX_FMT_GRAY8,
83
        PIX_FMT_NONE
84
    };
85

    
86
    avfilter_set_common_formats(ctx, avfilter_make_format_list(pix_fmts));
87
    return 0;
88
}
89

    
90
static int config_props_output(AVFilterLink *outlink)
91
{
92
    AVFilterContext *ctx = outlink->src;
93
    TransContext *trans = ctx->priv;
94
    AVFilterLink *inlink = ctx->inputs[0];
95
    const AVPixFmtDescriptor *pixdesc = &av_pix_fmt_descriptors[outlink->format];
96

    
97
    trans->hsub = av_pix_fmt_descriptors[inlink->format].log2_chroma_w;
98
    trans->vsub = av_pix_fmt_descriptors[inlink->format].log2_chroma_h;
99

    
100
    av_image_fill_max_pixsteps(trans->pixsteps, NULL, pixdesc);
101

    
102
    outlink->w = inlink->h;
103
    outlink->h = inlink->w;
104

    
105
    if (inlink->sample_aspect_ratio.num){
106
        outlink->sample_aspect_ratio = av_div_q((AVRational){1,1}, inlink->sample_aspect_ratio);
107
    } else
108
        outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
109

    
110
    av_log(ctx, AV_LOG_INFO, "w:%d h:%d dir:%d -> w:%d h:%d rotation:%s vflip:%d\n",
111
           inlink->w, inlink->h, trans->dir, outlink->w, outlink->h,
112
           trans->dir == 1 || trans->dir == 3 ? "clockwise" : "counterclockwise",
113
           trans->dir == 0 || trans->dir == 3);
114
    return 0;
115
}
116

    
117
static void start_frame(AVFilterLink *inlink, AVFilterBufferRef *picref)
118
{
119
    AVFilterLink *outlink = inlink->dst->outputs[0];
120

    
121
    outlink->out_buf = avfilter_get_video_buffer(outlink, AV_PERM_WRITE,
122
                                                 outlink->w, outlink->h);
123
    outlink->out_buf->pts = picref->pts;
124

    
125
    if (picref->video->sample_aspect_ratio.num == 0) {
126
        outlink->out_buf->video->sample_aspect_ratio = picref->video->sample_aspect_ratio;
127
    } else {
128
        outlink->out_buf->video->sample_aspect_ratio.num = picref->video->sample_aspect_ratio.den;
129
        outlink->out_buf->video->sample_aspect_ratio.den = picref->video->sample_aspect_ratio.num;
130
    }
131

    
132
    avfilter_start_frame(outlink, avfilter_ref_buffer(outlink->out_buf, ~0));
133
}
134

    
135
static void end_frame(AVFilterLink *inlink)
136
{
137
    TransContext *trans = inlink->dst->priv;
138
    AVFilterBufferRef *inpic  = inlink->cur_buf;
139
    AVFilterBufferRef *outpic = inlink->dst->outputs[0]->out_buf;
140
    AVFilterLink *outlink = inlink->dst->outputs[0];
141
    int plane;
142

    
143
    for (plane = 0; outpic->data[plane]; plane++) {
144
        int hsub = plane == 1 || plane == 2 ? trans->hsub : 0;
145
        int vsub = plane == 1 || plane == 2 ? trans->vsub : 0;
146
        int pixstep = trans->pixsteps[plane];
147
        int inh  = inpic->video->h>>vsub;
148
        int outw = outpic->video->w>>hsub;
149
        int outh = outpic->video->h>>vsub;
150
        uint8_t *out, *in;
151
        int outlinesize, inlinesize;
152
        int x, y;
153

    
154
        out = outpic->data[plane]; outlinesize = outpic->linesize[plane];
155
        in  = inpic ->data[plane]; inlinesize  = inpic ->linesize[plane];
156

    
157
        if (trans->dir&1) {
158
            in +=  inpic->linesize[plane] * (inh-1);
159
            inlinesize *= -1;
160
        }
161

    
162
        if (trans->dir&2) {
163
            out += outpic->linesize[plane] * (outh-1);
164
            outlinesize *= -1;
165
        }
166

    
167
        for (y = 0; y < outh; y++) {
168
            switch (pixstep) {
169
            case 1:
170
                for (x = 0; x < outw; x++)
171
                    out[x] = in[x*inlinesize + y];
172
                break;
173
            case 2:
174
                for (x = 0; x < outw; x++)
175
                    *((uint16_t *)(out + 2*x)) = *((uint16_t *)(in + x*inlinesize + y*2));
176
                break;
177
            case 3:
178
                for (x = 0; x < outw; x++) {
179
                    int32_t v = AV_RB24(in + x*inlinesize + y*3);
180
                    AV_WB24(out + 3*x, v);
181
                }
182
                break;
183
            case 4:
184
                for (x = 0; x < outw; x++)
185
                    *((uint32_t *)(out + 4*x)) = *((uint32_t *)(in + x*inlinesize + y*4));
186
                break;
187
            }
188
            out += outlinesize;
189
        }
190
    }
191

    
192
    avfilter_unref_buffer(inpic);
193
    avfilter_draw_slice(outlink, 0, outpic->video->h, 1);
194
    avfilter_end_frame(outlink);
195
    avfilter_unref_buffer(outpic);
196
}
197

    
198
AVFilter avfilter_vf_transpose = {
199
    .name      = "transpose",
200
    .description = NULL_IF_CONFIG_SMALL("Transpose input video."),
201

    
202
    .init = init,
203
    .priv_size = sizeof(TransContext),
204

    
205
    .query_formats = query_formats,
206

    
207
    .inputs    = (AVFilterPad[]) {{ .name            = "default",
208
                                    .type            = AVMEDIA_TYPE_VIDEO,
209
                                    .start_frame     = start_frame,
210
                                    .end_frame       = end_frame,
211
                                    .min_perms       = AV_PERM_READ, },
212
                                  { .name = NULL}},
213
    .outputs   = (AVFilterPad[]) {{ .name            = "default",
214
                                    .config_props    = config_props_output,
215
                                    .type            = AVMEDIA_TYPE_VIDEO, },
216
                                  { .name = NULL}},
217
};