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ffmpeg/libavfilter/vf_extractplanes.c
Clément Bœsch 50e66726a2 lavfi: use ceil right shift for chroma width/height. 
This should fix several issues with odd dimensions inputs.

lut, vflip, pad and crop video filters also need to be checked for such
issues. It's possible sws is also affected.
2013-05-10 17:20:06 +02:00

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/*
* Copyright (c) 2013 Paul B Mahol
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/avstring.h"
#include "libavutil/imgutils.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "drawutils.h"
#include "internal.h"
#define PLANE_R 0x01
#define PLANE_G 0x02
#define PLANE_B 0x04
#define PLANE_A 0x08
#define PLANE_Y 0x10
#define PLANE_U 0x20
#define PLANE_V 0x40
typedef struct {
const AVClass *class;
int requested_planes;
int map[4];
int linesize[4];
int is_packed_rgb;
int depth;
int step;
} ExtractPlanesContext;
#define OFFSET(x) offsetof(ExtractPlanesContext, x)
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
static const AVOption extractplanes_options[] = {
{ "planes", "set planes", OFFSET(requested_planes), AV_OPT_TYPE_FLAGS, {.i64=1}, 1, 0xff, FLAGS, "flags"},
{ "y", "set luma plane", 0, AV_OPT_TYPE_CONST, {.i64=PLANE_Y}, 0, 0, FLAGS, "flags"},
{ "u", "set u plane", 0, AV_OPT_TYPE_CONST, {.i64=PLANE_U}, 0, 0, FLAGS, "flags"},
{ "v", "set v plane", 0, AV_OPT_TYPE_CONST, {.i64=PLANE_V}, 0, 0, FLAGS, "flags"},
{ "r", "set red plane", 0, AV_OPT_TYPE_CONST, {.i64=PLANE_R}, 0, 0, FLAGS, "flags"},
{ "g", "set green plane", 0, AV_OPT_TYPE_CONST, {.i64=PLANE_G}, 0, 0, FLAGS, "flags"},
{ "b", "set blue plane", 0, AV_OPT_TYPE_CONST, {.i64=PLANE_B}, 0, 0, FLAGS, "flags"},
{ "a", "set alpha plane", 0, AV_OPT_TYPE_CONST, {.i64=PLANE_A}, 0, 0, FLAGS, "flags"},
{ NULL }
};
AVFILTER_DEFINE_CLASS(extractplanes);
static int query_formats(AVFilterContext *ctx)
{
static const enum AVPixelFormat in_pixfmts[] = {
AV_PIX_FMT_YUV410P,
AV_PIX_FMT_YUV411P,
AV_PIX_FMT_YUV440P,
AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUVA420P,
AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA422P,
AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P,
AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ444P,
AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVA444P,
AV_PIX_FMT_YUV420P16LE, AV_PIX_FMT_YUVA420P16LE,
AV_PIX_FMT_YUV420P16BE, AV_PIX_FMT_YUVA420P16BE,
AV_PIX_FMT_YUV422P16LE, AV_PIX_FMT_YUVA422P16LE,
AV_PIX_FMT_YUV422P16BE, AV_PIX_FMT_YUVA422P16BE,
AV_PIX_FMT_YUV444P16LE, AV_PIX_FMT_YUVA444P16LE,
AV_PIX_FMT_YUV444P16BE, AV_PIX_FMT_YUVA444P16BE,
AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY8A,
AV_PIX_FMT_GRAY16LE, AV_PIX_FMT_GRAY16BE,
AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24,
AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA,
AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR,
AV_PIX_FMT_RGB48LE, AV_PIX_FMT_BGR48LE,
AV_PIX_FMT_RGB48BE, AV_PIX_FMT_BGR48BE,
AV_PIX_FMT_RGBA64LE, AV_PIX_FMT_BGRA64LE,
AV_PIX_FMT_RGBA64BE, AV_PIX_FMT_BGRA64BE,
AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP,
AV_PIX_FMT_GBRP16LE, AV_PIX_FMT_GBRP16BE,
AV_PIX_FMT_GBRAP16LE, AV_PIX_FMT_GBRAP16BE,
AV_PIX_FMT_NONE,
};
static const enum AVPixelFormat out8_pixfmts[] = { AV_PIX_FMT_GRAY8, AV_PIX_FMT_NONE };
static const enum AVPixelFormat out16le_pixfmts[] = { AV_PIX_FMT_GRAY16LE, AV_PIX_FMT_NONE };
static const enum AVPixelFormat out16be_pixfmts[] = { AV_PIX_FMT_GRAY16BE, AV_PIX_FMT_NONE };
const enum AVPixelFormat *out_pixfmts;
const AVPixFmtDescriptor *desc;
AVFilterFormats *avff;
int i, depth = 0, be = 0;
if (!ctx->inputs[0]->in_formats ||
!ctx->inputs[0]->in_formats->format_count) {
return AVERROR(EAGAIN);
}
if (!ctx->inputs[0]->out_formats)
ff_formats_ref(ff_make_format_list(in_pixfmts), &ctx->inputs[0]->out_formats);
avff = ctx->inputs[0]->in_formats;
desc = av_pix_fmt_desc_get(avff->formats[0]);
depth = desc->comp[0].depth_minus1;
be = desc->flags & PIX_FMT_BE;
for (i = 1; i < avff->format_count; i++) {
desc = av_pix_fmt_desc_get(avff->formats[i]);
if (depth != desc->comp[0].depth_minus1 ||
be != (desc->flags & PIX_FMT_BE)) {
return AVERROR(EAGAIN);
}
}
if (depth == 7)
out_pixfmts = out8_pixfmts;
else if (be)
out_pixfmts = out16be_pixfmts;
else
out_pixfmts = out16le_pixfmts;
for (i = 0; i < ctx->nb_outputs; i++)
ff_formats_ref(ff_make_format_list(out_pixfmts), &ctx->outputs[i]->in_formats);
return 0;
}
static int config_input(AVFilterLink *inlink)
{
AVFilterContext *ctx = inlink->dst;
ExtractPlanesContext *e = ctx->priv;
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
int plane_avail, ret, i;
uint8_t rgba_map[4];
plane_avail = ((desc->flags & PIX_FMT_RGB) ? PLANE_R|PLANE_G|PLANE_B :
PLANE_Y |
((desc->nb_components > 2) ? PLANE_U|PLANE_V : 0)) |
((desc->flags & PIX_FMT_ALPHA) ? PLANE_A : 0);
if (e->requested_planes & ~plane_avail) {
av_log(ctx, AV_LOG_ERROR, "Requested planes not available.\n");
return AVERROR(EINVAL);
}
if ((ret = av_image_fill_linesizes(e->linesize, inlink->format, inlink->w)) < 0)
return ret;
e->depth = (desc->comp[0].depth_minus1 + 1) >> 3;
e->step = av_get_padded_bits_per_pixel(desc) >> 3;
e->is_packed_rgb = !(desc->flags & PIX_FMT_PLANAR);
if (desc->flags & PIX_FMT_RGB) {
ff_fill_rgba_map(rgba_map, inlink->format);
for (i = 0; i < 4; i++)
e->map[i] = rgba_map[e->map[i]];
}
return 0;
}
static int config_output(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
AVFilterLink *inlink = ctx->inputs[0];
ExtractPlanesContext *e = ctx->priv;
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
const int output = outlink->srcpad - ctx->output_pads;
if (e->map[output] == 1 || e->map[output] == 2) {
outlink->h = FF_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
outlink->w = FF_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
}
return 0;
}
static void extract_from_packed(uint8_t *dst, int dst_linesize,
const uint8_t *src, int src_linesize,
int width, int height,
int depth, int step, int comp)
{
int x, y;
for (y = 0; y < height; y++) {
switch (depth) {
case 1:
for (x = 0; x < width; x++)
dst[x] = src[x * step + comp];
break;
case 2:
for (x = 0; x < width; x++) {
dst[x * 2 ] = src[x * step + comp * 2 ];
dst[x * 2 + 1] = src[x * step + comp * 2 + 1];
}
break;
}
dst += dst_linesize;
src += src_linesize;
}
}
static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
{
AVFilterContext *ctx = inlink->dst;
ExtractPlanesContext *e = ctx->priv;
int i, eof = 0, ret = 0;
for (i = 0; i < ctx->nb_outputs; i++) {
AVFilterLink *outlink = ctx->outputs[i];
const int idx = e->map[i];
AVFrame *out;
if (outlink->closed)
continue;
out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
if (!out) {
ret = AVERROR(ENOMEM);
break;
}
av_frame_copy_props(out, frame);
if (e->is_packed_rgb) {
extract_from_packed(out->data[0], out->linesize[0],
frame->data[0], frame->linesize[0],
outlink->w, outlink->h,
e->depth,
e->step, idx);
} else {
av_image_copy_plane(out->data[0], out->linesize[0],
frame->data[idx], frame->linesize[idx],
e->linesize[idx], outlink->h);
}
ret = ff_filter_frame(outlink, out);
if (ret == AVERROR_EOF)
eof++;
else if (ret < 0)
break;
}
av_frame_free(&frame);
if (eof == ctx->nb_outputs)
ret = AVERROR_EOF;
else if (ret == AVERROR_EOF)
ret = 0;
return ret;
}
static int init(AVFilterContext *ctx)
{
ExtractPlanesContext *e = ctx->priv;
int planes = (e->requested_planes & 0xf) | (e->requested_planes >> 4);
int i;
for (i = 0; i < 4; i++) {
char *name;
AVFilterPad pad = { 0 };
if (!(planes & (1 << i)))
continue;
name = av_asprintf("out%d", ctx->nb_outputs);
if (!name)
return AVERROR(ENOMEM);
e->map[ctx->nb_outputs] = i;
pad.name = name;
pad.type = AVMEDIA_TYPE_VIDEO;
pad.config_props = config_output;
ff_insert_outpad(ctx, ctx->nb_outputs, &pad);
}
return 0;
}
static av_cold void uninit(AVFilterContext *ctx)
{
int i;
for (i = 0; i < ctx->nb_outputs; i++)
av_freep(&ctx->output_pads[i].name);
}
static const AVFilterPad extractplanes_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = filter_frame,
.config_props = config_input,
},
{ NULL }
};
AVFilter avfilter_vf_extractplanes = {
.name = "extractplanes",
.description = NULL_IF_CONFIG_SMALL("Extract planes as grayscale frames."),
.priv_size = sizeof(ExtractPlanesContext),
.priv_class = &extractplanes_class,
.init = init,
.uninit = uninit,
.query_formats = query_formats,
.inputs = extractplanes_inputs,
.outputs = NULL,
.flags = AVFILTER_FLAG_DYNAMIC_OUTPUTS,
};
#if CONFIG_ALPHAEXTRACT_FILTER
static int init_alphaextract(AVFilterContext *ctx)
{
ExtractPlanesContext *e = ctx->priv;
e->requested_planes = PLANE_A;
return init(ctx);
}
AVFilter avfilter_vf_alphaextract = {
.name = "alphaextract",
.description = NULL_IF_CONFIG_SMALL("Extract an alpha channel as a "
"grayscale image component."),
.priv_size = sizeof(ExtractPlanesContext),
.init = init_alphaextract,
.uninit = uninit,
.query_formats = query_formats,
.inputs = extractplanes_inputs,
.outputs = NULL,
.flags = AVFILTER_FLAG_DYNAMIC_OUTPUTS,
};
#endif /* CONFIG_ALPHAEXTRACT_FILTER */
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