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Code Issues Releases Activity

avfilter/vf_elbg: make it possible to output to pal8 pixel format

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Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2015-08-31 12:38:24 +00:00
parent bd70303ead
commit 19dfbe9298
2 changed files with 58 additions and 5 deletions
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4
doc/filters.texi
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@ -5279,6 +5279,10 @@ computation time. Default value is 1.
Set a random seed, must be an integer included between 0 and
UINT32_MAX. If not specified, or if explicitly set to -1, the filter
will try to use a good random seed on a best effort basis.
@item pal8
Set pal8 output pixel format. This option does not work with codebook
length greater than 256.
@end table
@section fade

59
libavfilter/vf_elbg.c
View File

@ -33,7 +33,7 @@
#include "internal.h"
#include "video.h"
typedef struct ColorContext {
typedef struct ELBGContext {
const AVClass *class;
AVLFG lfg;
unsigned int lfg_seed;
@ -45,6 +45,7 @@ typedef struct ColorContext {
int codebook_length;
const AVPixFmtDescriptor *pix_desc;
uint8_t rgba_map[4];
int pal8;
} ELBGContext;
#define OFFSET(x) offsetof(ELBGContext, x)
@ -57,6 +58,7 @@ static const AVOption elbg_options[] = {
{ "n", "set max number of steps used to compute the mapping", OFFSET(max_steps_nb), AV_OPT_TYPE_INT, { .i64 = 1 }, 1, INT_MAX, FLAGS },
{ "seed", "set the random seed", OFFSET(lfg_seed), AV_OPT_TYPE_INT, {.i64 = -1}, -1, UINT32_MAX, FLAGS },
{ "s", "set the random seed", OFFSET(lfg_seed), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, UINT32_MAX, FLAGS },
{ "pal8", "set the pal8 output", OFFSET(pal8), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, FLAGS },
{ NULL }
};
@ -66,6 +68,11 @@ static av_cold int init(AVFilterContext *ctx)
{
ELBGContext *elbg = ctx->priv;
if (elbg->pal8 && elbg->codebook_length > 256) {
av_log(ctx, AV_LOG_ERROR, "pal8 output allows max 256 codebook length.\n");
return AVERROR(EINVAL);
}
if (elbg->lfg_seed == -1)
elbg->lfg_seed = av_get_random_seed();
@ -75,15 +82,27 @@ static av_cold int init(AVFilterContext *ctx)
static int query_formats(AVFilterContext *ctx)
{
ELBGContext *elbg = ctx->priv;
static const enum AVPixelFormat pix_fmts[] = {
AV_PIX_FMT_ARGB, AV_PIX_FMT_RGBA, AV_PIX_FMT_ABGR, AV_PIX_FMT_BGRA,
AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24,
AV_PIX_FMT_NONE
};
AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
if (!fmts_list)
return AVERROR(ENOMEM);
return ff_set_common_formats(ctx, fmts_list);
if (!elbg->pal8) {
AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
if (!fmts_list)
return AVERROR(ENOMEM);
return ff_set_common_formats(ctx, fmts_list);
} else {
static const enum AVPixelFormat pal8_fmt[] = {
AV_PIX_FMT_PAL8,
AV_PIX_FMT_NONE
};
ff_formats_ref(ff_make_format_list(pix_fmts), &ctx->inputs[0]->out_formats);
ff_formats_ref(ff_make_format_list(pal8_fmt), &ctx->outputs[0]->in_formats);
}
return 0;
}
#define NB_COMPONENTS 3
@ -152,6 +171,36 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
elbg->codebook, elbg->codebook_length, elbg->max_steps_nb,
elbg->codeword_closest_codebook_idxs, &elbg->lfg);
if (elbg->pal8) {
AVFilterLink *outlink = inlink->dst->outputs[0];
AVFrame *out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
uint32_t *pal;
if (!out)
return AVERROR(ENOMEM);
out->pts = frame->pts;
av_frame_free(&frame);
pal = (uint32_t *)out->data[1];
p0 = (uint8_t *)out->data[0];
for (i = 0; i < elbg->codebook_length; i++) {
pal[i] = (elbg->codebook[i*3 ] << 16) |
(elbg->codebook[i*3+1] << 8) |
elbg->codebook[i*3+2];
}
k = 0;
for (i = 0; i < inlink->h; i++) {
p = p0;
for (j = 0; j < inlink->w; j++, p++) {
p[0] = elbg->codeword_closest_codebook_idxs[k++];
}
p0 += out->linesize[0];
}
return ff_filter_frame(outlink, out);
}
/* fill the output with the codebook values */
p0 = frame->data[0];