*
* This file is part of FFmpeg.
*
- * FFmpeg is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
+ * 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 General Public License for more details.
+ * 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 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.
+ * 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
*/
/**
float saturation;
char *saturation_expr;
AVExpr *saturation_pexpr;
+ float brightness;
+ char *brightness_expr;
+ AVExpr *brightness_pexpr;
int hsub;
int vsub;
+ int is_first;
int32_t hue_sin;
int32_t hue_cos;
double var_values[VAR_NB];
+ uint8_t lut_l[256];
+ uint8_t lut_u[256][256];
+ uint8_t lut_v[256][256];
} HueContext;
#define OFFSET(x) offsetof(HueContext, x)
{ .str = "1" }, .flags = FLAGS },
{ "H", "set the hue angle radians expression", OFFSET(hue_expr), AV_OPT_TYPE_STRING,
{ .str = NULL }, .flags = FLAGS },
+ { "b", "set the brightness expression", OFFSET(brightness_expr), AV_OPT_TYPE_STRING,
+ { .str = "0" }, .flags = FLAGS },
{ NULL }
};
/*
* Scale the value to the norm of the resulting (U,V) vector, that is
* the saturation.
- * This will be useful in the process_chrominance function.
+ * This will be useful in the apply_lut function.
*/
- hue->hue_sin = rint(sin(hue->hue) * (1 << 16) * hue->saturation);
- hue->hue_cos = rint(cos(hue->hue) * (1 << 16) * hue->saturation);
+ hue->hue_sin = lrint(sin(hue->hue) * (1 << 16) * hue->saturation);
+ hue->hue_cos = lrint(cos(hue->hue) * (1 << 16) * hue->saturation);
}
-static int set_expr(AVExpr **pexpr, const char *expr, const char *option, void *log_ctx)
+static inline void create_luma_lut(HueContext *h)
+{
+ const float b = h->brightness;
+ int i;
+
+ for (i = 0; i < 256; i++) {
+ h->lut_l[i] = av_clip_uint8(i + b * 25.5);
+ }
+}
+
+static inline void create_chrominance_lut(HueContext *h, const int32_t c,
+ const int32_t s)
+{
+ int32_t i, j, u, v, new_u, new_v;
+
+ /*
+ * If we consider U and V as the components of a 2D vector then its angle
+ * is the hue and the norm is the saturation
+ */
+ for (i = 0; i < 256; i++) {
+ for (j = 0; j < 256; j++) {
+ /* Normalize the components from range [16;140] to [-112;112] */
+ u = i - 128;
+ v = j - 128;
+ /*
+ * Apply the rotation of the vector : (c * u) - (s * v)
+ * (s * u) + (c * v)
+ * De-normalize the components (without forgetting to scale 128
+ * by << 16)
+ * Finally scale back the result by >> 16
+ */
+ new_u = ((c * u) - (s * v) + (1 << 15) + (128 << 16)) >> 16;
+ new_v = ((s * u) + (c * v) + (1 << 15) + (128 << 16)) >> 16;
+
+ /* Prevent a potential overflow */
+ h->lut_u[i][j] = av_clip_uint8(new_u);
+ h->lut_v[i][j] = av_clip_uint8(new_v);
+ }
+ }
+}
+
+static int set_expr(AVExpr **pexpr_ptr, char **expr_ptr,
+ const char *expr, const char *option, void *log_ctx)
{
int ret;
- AVExpr *old = NULL;
+ AVExpr *new_pexpr;
+ char *new_expr;
- if (*pexpr)
- old = *pexpr;
- ret = av_expr_parse(pexpr, expr, var_names,
+ new_expr = av_strdup(expr);
+ if (!new_expr)
+ return AVERROR(ENOMEM);
+ ret = av_expr_parse(&new_pexpr, expr, var_names,
NULL, NULL, NULL, NULL, 0, log_ctx);
if (ret < 0) {
av_log(log_ctx, AV_LOG_ERROR,
"Error when evaluating the expression '%s' for %s\n",
expr, option);
- *pexpr = old;
+ av_free(new_expr);
return ret;
}
- av_expr_free(old);
+
+ if (*pexpr_ptr)
+ av_expr_free(*pexpr_ptr);
+ *pexpr_ptr = new_pexpr;
+ av_freep(expr_ptr);
+ *expr_ptr = new_expr;
+
return 0;
}
-static av_cold int init(AVFilterContext *ctx, const char *args)
+static av_cold int init(AVFilterContext *ctx)
{
HueContext *hue = ctx->priv;
int ret;
#define SET_EXPR(expr, option) \
if (hue->expr##_expr) do { \
- ret = set_expr(&hue->expr##_pexpr, hue->expr##_expr, option, ctx); \
+ ret = set_expr(&hue->expr##_pexpr, &hue->expr##_expr, \
+ hue->expr##_expr, option, ctx); \
if (ret < 0) \
return ret; \
} while (0)
+ SET_EXPR(brightness, "b");
SET_EXPR(saturation, "s");
SET_EXPR(hue_deg, "h");
SET_EXPR(hue, "H");
+#undef SET_EXPR
av_log(ctx, AV_LOG_VERBOSE,
- "H_expr:%s h_deg_expr:%s s_expr:%s\n",
- hue->hue_expr, hue->hue_deg_expr, hue->saturation_expr);
+ "H_expr:%s h_deg_expr:%s s_expr:%s b_expr:%s\n",
+ hue->hue_expr, hue->hue_deg_expr, hue->saturation_expr, hue->brightness_expr);
compute_sin_and_cos(hue);
+ hue->is_first = 1;
return 0;
}
{
HueContext *hue = ctx->priv;
+ av_expr_free(hue->brightness_pexpr);
av_expr_free(hue->hue_deg_pexpr);
av_expr_free(hue->hue_pexpr);
av_expr_free(hue->saturation_pexpr);
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_NONE
};
-
- ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
-
- return 0;
+ AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
+ if (!fmts_list)
+ return AVERROR(ENOMEM);
+ return ff_set_common_formats(ctx, fmts_list);
}
static int config_props(AVFilterLink *inlink)
return 0;
}
-static void process_chrominance(uint8_t *udst, uint8_t *vdst, const int dst_linesize,
- uint8_t *usrc, uint8_t *vsrc, const int src_linesize,
- int w, int h,
- const int32_t c, const int32_t s)
+static void apply_luma_lut(HueContext *s,
+ uint8_t *ldst, const int dst_linesize,
+ uint8_t *lsrc, const int src_linesize,
+ int w, int h)
+{
+ int i;
+
+ while (h--) {
+ for (i = 0; i < w; i++)
+ ldst[i] = s->lut_l[lsrc[i]];
+
+ lsrc += src_linesize;
+ ldst += dst_linesize;
+ }
+}
+
+static void apply_lut(HueContext *s,
+ uint8_t *udst, uint8_t *vdst, const int dst_linesize,
+ uint8_t *usrc, uint8_t *vsrc, const int src_linesize,
+ int w, int h)
{
- int32_t u, v, new_u, new_v;
int i;
- /*
- * If we consider U and V as the components of a 2D vector then its angle
- * is the hue and the norm is the saturation
- */
while (h--) {
for (i = 0; i < w; i++) {
- /* Normalize the components from range [16;140] to [-112;112] */
- u = usrc[i] - 128;
- v = vsrc[i] - 128;
- /*
- * Apply the rotation of the vector : (c * u) - (s * v)
- * (s * u) + (c * v)
- * De-normalize the components (without forgetting to scale 128
- * by << 16)
- * Finally scale back the result by >> 16
- */
- new_u = ((c * u) - (s * v) + (1 << 15) + (128 << 16)) >> 16;
- new_v = ((s * u) + (c * v) + (1 << 15) + (128 << 16)) >> 16;
+ const int u = usrc[i];
+ const int v = vsrc[i];
- /* Prevent a potential overflow */
- udst[i] = av_clip_uint8_c(new_u);
- vdst[i] = av_clip_uint8_c(new_v);
+ udst[i] = s->lut_u[u][v];
+ vdst[i] = s->lut_v[u][v];
}
usrc += src_linesize;
HueContext *hue = inlink->dst->priv;
AVFilterLink *outlink = inlink->dst->outputs[0];
AVFrame *outpic;
+ const int32_t old_hue_sin = hue->hue_sin, old_hue_cos = hue->hue_cos;
+ const float old_brightness = hue->brightness;
int direct = 0;
if (av_frame_is_writable(inpic)) {
av_frame_copy_props(outpic, inpic);
}
- /* todo: reindent */
- hue->var_values[VAR_T] = TS2T(inpic->pts, inlink->time_base);
- hue->var_values[VAR_PTS] = TS2D(inpic->pts);
+ hue->var_values[VAR_N] = inlink->frame_count;
+ hue->var_values[VAR_T] = TS2T(inpic->pts, inlink->time_base);
+ hue->var_values[VAR_PTS] = TS2D(inpic->pts);
- if (hue->saturation_expr) {
- hue->saturation = av_expr_eval(hue->saturation_pexpr, hue->var_values, NULL);
+ if (hue->saturation_expr) {
+ hue->saturation = av_expr_eval(hue->saturation_pexpr, hue->var_values, NULL);
- if (hue->saturation < SAT_MIN_VAL || hue->saturation > SAT_MAX_VAL) {
- hue->saturation = av_clip(hue->saturation, SAT_MIN_VAL, SAT_MAX_VAL);
- av_log(inlink->dst, AV_LOG_WARNING,
- "Saturation value not in range [%d,%d]: clipping value to %0.1f\n",
- SAT_MIN_VAL, SAT_MAX_VAL, hue->saturation);
- }
+ if (hue->saturation < SAT_MIN_VAL || hue->saturation > SAT_MAX_VAL) {
+ hue->saturation = av_clip(hue->saturation, SAT_MIN_VAL, SAT_MAX_VAL);
+ av_log(inlink->dst, AV_LOG_WARNING,
+ "Saturation value not in range [%d,%d]: clipping value to %0.1f\n",
+ SAT_MIN_VAL, SAT_MAX_VAL, hue->saturation);
}
+ }
- if (hue->hue_deg_expr) {
- hue->hue_deg = av_expr_eval(hue->hue_deg_pexpr, hue->var_values, NULL);
- hue->hue = hue->hue_deg * M_PI / 180;
- } else if (hue->hue_expr) {
- hue->hue = av_expr_eval(hue->hue_pexpr, hue->var_values, NULL);
- }
+ if (hue->brightness_expr) {
+ hue->brightness = av_expr_eval(hue->brightness_pexpr, hue->var_values, NULL);
- av_log(inlink->dst, AV_LOG_DEBUG,
- "H:%0.1f s:%0.f t:%0.1f n:%d\n",
- hue->hue, hue->saturation,
- hue->var_values[VAR_T], (int)hue->var_values[VAR_N]);
+ if (hue->brightness < -10 || hue->brightness > 10) {
+ hue->brightness = av_clipf(hue->brightness, -10, 10);
+ av_log(inlink->dst, AV_LOG_WARNING,
+ "Brightness value not in range [%d,%d]: clipping value to %0.1f\n",
+ -10, 10, hue->brightness);
+ }
+ }
- compute_sin_and_cos(hue);
+ if (hue->hue_deg_expr) {
+ hue->hue_deg = av_expr_eval(hue->hue_deg_pexpr, hue->var_values, NULL);
+ hue->hue = hue->hue_deg * M_PI / 180;
+ } else if (hue->hue_expr) {
+ hue->hue = av_expr_eval(hue->hue_pexpr, hue->var_values, NULL);
+ hue->hue_deg = hue->hue * 180 / M_PI;
+ }
- hue->var_values[VAR_N] += 1;
+ av_log(inlink->dst, AV_LOG_DEBUG,
+ "H:%0.1f*PI h:%0.1f s:%0.1f b:%0.f t:%0.1f n:%d\n",
+ hue->hue/M_PI, hue->hue_deg, hue->saturation, hue->brightness,
+ hue->var_values[VAR_T], (int)hue->var_values[VAR_N]);
- if (!direct)
- av_image_copy_plane(outpic->data[0], outpic->linesize[0],
- inpic->data[0], inpic->linesize[0],
- inlink->w, inlink->h);
+ compute_sin_and_cos(hue);
+ if (hue->is_first || (old_hue_sin != hue->hue_sin || old_hue_cos != hue->hue_cos))
+ create_chrominance_lut(hue, hue->hue_cos, hue->hue_sin);
+
+ if (hue->is_first || (old_brightness != hue->brightness && hue->brightness))
+ create_luma_lut(hue);
+
+ if (!direct) {
+ if (!hue->brightness)
+ av_image_copy_plane(outpic->data[0], outpic->linesize[0],
+ inpic->data[0], inpic->linesize[0],
+ inlink->w, inlink->h);
+ if (inpic->data[3])
+ av_image_copy_plane(outpic->data[3], outpic->linesize[3],
+ inpic->data[3], inpic->linesize[3],
+ inlink->w, inlink->h);
+ }
- process_chrominance(outpic->data[1], outpic->data[2], outpic->linesize[1],
- inpic->data[1], inpic->data[2], inpic->linesize[1],
- inlink->w >> hue->hsub, inlink->h >> hue->vsub,
- hue->hue_cos, hue->hue_sin);
+ apply_lut(hue, outpic->data[1], outpic->data[2], outpic->linesize[1],
+ inpic->data[1], inpic->data[2], inpic->linesize[1],
+ AV_CEIL_RSHIFT(inlink->w, hue->hsub),
+ AV_CEIL_RSHIFT(inlink->h, hue->vsub));
+ if (hue->brightness)
+ apply_luma_lut(hue, outpic->data[0], outpic->linesize[0],
+ inpic->data[0], inpic->linesize[0], inlink->w, inlink->h);
if (!direct)
av_frame_free(&inpic);
+
+ hue->is_first = 0;
return ff_filter_frame(outlink, outpic);
}
char *res, int res_len, int flags)
{
HueContext *hue = ctx->priv;
+ int ret;
-#define SET_CMD(expr, option) \
- if (!strcmp(cmd, option)) do { \
- return set_expr(&hue->expr##_pexpr, args, cmd, ctx); \
+#define SET_EXPR(expr, option) \
+ do { \
+ ret = set_expr(&hue->expr##_pexpr, &hue->expr##_expr, \
+ args, option, ctx); \
+ if (ret < 0) \
+ return ret; \
} while (0)
- SET_CMD(hue_deg, "h");
- SET_CMD(hue, "H");
- SET_CMD(saturation, "s");
- return AVERROR(ENOSYS);
+ if (!strcmp(cmd, "h")) {
+ SET_EXPR(hue_deg, "h");
+ av_freep(&hue->hue_expr);
+ } else if (!strcmp(cmd, "H")) {
+ SET_EXPR(hue, "H");
+ av_freep(&hue->hue_deg_expr);
+ } else if (!strcmp(cmd, "s")) {
+ SET_EXPR(saturation, "s");
+ } else if (!strcmp(cmd, "b")) {
+ SET_EXPR(brightness, "b");
+ } else
+ return AVERROR(ENOSYS);
+
+ return 0;
}
static const AVFilterPad hue_inputs[] = {
{ NULL }
};
-AVFilter avfilter_vf_hue = {
- .name = "hue",
- .description = NULL_IF_CONFIG_SMALL("Adjust the hue and saturation of the input video."),
-
- .priv_size = sizeof(HueContext),
-
- .init = init,
- .uninit = uninit,
- .query_formats = query_formats,
+AVFilter ff_vf_hue = {
+ .name = "hue",
+ .description = NULL_IF_CONFIG_SMALL("Adjust the hue and saturation of the input video."),
+ .priv_size = sizeof(HueContext),
+ .init = init,
+ .uninit = uninit,
+ .query_formats = query_formats,
.process_command = process_command,
.inputs = hue_inputs,
.outputs = hue_outputs,
.priv_class = &hue_class,
+ .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
};