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avfilter/geq: rgb support 

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-04-23 15:46:51 +02:00
parent ad56535dd1
commit 8f04220df8
1 changed files with 39 additions and 8 deletions
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47
libavfilter/vf_geq.c
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@ -35,10 +35,11 @@
typedef struct {
const AVClass *class;
AVExpr *e[4]; ///< expressions for each plane
char *expr_str[4]; ///< expression strings for each plane
char *expr_str[4+3]; ///< expression strings for each plane
AVFrame *picref; ///< current input buffer
int hsub, vsub; ///< chroma subsampling
int planes; ///< number of planes
int is_rgb;
} GEQContext;
#define OFFSET(x) offsetof(GEQContext, x)
@ -49,6 +50,10 @@ static const AVOption geq_options[] = {
{ "cb_expr", "set chroma blue expression", OFFSET(expr_str[1]), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },
{ "cr_expr", "set chroma red expression", OFFSET(expr_str[2]), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },
{ "alpha_expr", "set alpha expression", OFFSET(expr_str[3]), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },
{ "r", "set red expression", OFFSET(expr_str[6]), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },
{ "g", "set green expression", OFFSET(expr_str[4]), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },
{ "b", "set blue expression", OFFSET(expr_str[5]), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },
{NULL},
};
@ -92,8 +97,15 @@ static av_cold int geq_init(AVFilterContext *ctx)
GEQContext *geq = ctx->priv;
int plane, ret = 0;
if (!geq->expr_str[0]) {
av_log(ctx, AV_LOG_ERROR, "Luminance expression is mandatory\n");
if (!geq->expr_str[0] && !geq->expr_str[4] && !geq->expr_str[5] && !geq->expr_str[6]) {
av_log(ctx, AV_LOG_ERROR, "A luminance or RGB expression is mandatory\n");
ret = AVERROR(EINVAL);
goto end;
}
geq->is_rgb = !geq->expr_str[0];
if ((geq->expr_str[0] || geq->expr_str[1] || geq->expr_str[2]) && (geq->expr_str[4] || geq->expr_str[5] || geq->expr_str[6])) {
av_log(ctx, AV_LOG_ERROR, "Either YCbCr or RGB but not both must be specified\n");
ret = AVERROR(EINVAL);
goto end;
}
@ -110,18 +122,29 @@ static av_cold int geq_init(AVFilterContext *ctx)
if (!geq->expr_str[3])
geq->expr_str[3] = av_strdup("255");
if (!geq->expr_str[4])
geq->expr_str[4] = av_strdup("g(X,Y)");
if (!geq->expr_str[5])
geq->expr_str[5] = av_strdup("b(X,Y)");
if (!geq->expr_str[6])
geq->expr_str[6] = av_strdup("r(X,Y)");
if (!geq->expr_str[1] || !geq->expr_str[2] || !geq->expr_str[3]) {
if (geq->is_rgb ?
(!geq->expr_str[4] || !geq->expr_str[5] || !geq->expr_str[6])
:
(!geq->expr_str[1] || !geq->expr_str[2] || !geq->expr_str[3])) {
ret = AVERROR(ENOMEM);
goto end;
}
for (plane = 0; plane < 4; plane++) {
static double (*p[])(void *, double, double) = { lum, cb, cr, alpha };
static const char *const func2_names[] = { "lum", "cb", "cr", "alpha", "p", NULL };
static const char *const func2_yuv_names[] = { "lum", "cb", "cr", "alpha", "p", NULL };
static const char *const func2_rgb_names[] = { "g", "b", "r", "alpha", "p", NULL };
const char *const *func2_names = geq->is_rgb ? func2_rgb_names : func2_yuv_names;
double (*func2[])(void *, double, double) = { lum, cb, cr, alpha, p[plane], NULL };
ret = av_expr_parse(&geq->e[plane], geq->expr_str[plane], var_names,
ret = av_expr_parse(&geq->e[plane], geq->expr_str[plane < 3 && geq->is_rgb ? plane+4 : plane], var_names,
NULL, NULL, func2_names, func2, 0, ctx);
if (ret < 0)
break;
@ -133,14 +156,22 @@ end:
static int geq_query_formats(AVFilterContext *ctx)
{
static const enum PixelFormat pix_fmts[] = {
GEQContext *geq = ctx->priv;
static const enum PixelFormat yuv_pix_fmts[] = {
AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P,
AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV440P,
AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA420P,
AV_PIX_FMT_GRAY8,
AV_PIX_FMT_NONE
};
ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
static const enum PixelFormat rgb_pix_fmts[] = {
AV_PIX_FMT_GBRP,
AV_PIX_FMT_NONE
};
if (geq->is_rgb) {
ff_set_common_formats(ctx, ff_make_format_list(rgb_pix_fmts));
} else
ff_set_common_formats(ctx, ff_make_format_list(yuv_pix_fmts));
return 0;
}