lavfi: add ProcAmp (color balance) VAAPI video filter.

Add ProcAmp(color balance) vaapi video filter, use the option
like -vf "procamp_vaapi=b=10:h=120:c=2.8:s=3.7" to set
brightness/hue/contrast/saturation.

Signed-off-by: Yun Zhou <yunx.z.zhou@intel.com>
Signed-off-by: Jun Zhao <jun.zhao@intel.com>
Signed-off-by: Mark Thompson <sw@jkqxz.net>

1 files changed, 281 insertions, 0 deletions

diff --git a/libavfilter/vf_procamp_vaapi.c b/libavfilter/vf_procamp_vaapi.c
new file mode 100644
index 0000000000..10f9a6ba0c
--- /dev/null
+++ b/libavfilter/vf_procamp_vaapi.c
@@ -0,0 +1,281 @@
+/*
+ * 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 <string.h>
+
+#include "libavutil/avassert.h"
+#include "libavutil/mem.h"
+#include "libavutil/opt.h"
+#include "libavutil/pixdesc.h"
+
+#include "avfilter.h"
+#include "formats.h"
+#include "internal.h"
+#include "vaapi_vpp.h"
+
+// ProcAmp Min/Max/Default Values
+#define BRIGHTNESS_MIN     -100.0F
+#define BRIGHTNESS_MAX      100.0F
+#define BRIGHTNESS_DEFAULT    0.0F
+
+#define CONTRAST_MIN          0.0F
+#define CONTRAST_MAX         10.0F
+#define CONTRAST_DEFAULT      1.0F
+
+#define HUE_MIN            -180.0F
+#define HUE_MAX             180.0F
+#define HUE_DEFAULT           0.0F
+
+#define SATURATION_MIN        0.0F
+#define SATURATION_MAX       10.0F
+#define SATURATION_DEFAULT    1.0F
+
+#define EPSILON               0.00001F
+
+typedef struct ProcampVAAPIContext {
+    VAAPIVPPContext vpp_ctx; // must be the first fileld
+
+    float bright;
+    float hue;
+    float saturation;
+    float contrast;
+} ProcampVAAPIContext;
+
+static float map(float x, float in_min, float in_max, float out_min, float out_max)
+{
+    double slope, output;
+
+    slope = 1.0 * (out_max - out_min) / (in_max - in_min);
+    output = out_min + slope * (x - in_min);
+
+    return (float)output;
+}
+
+static int fequal(float a, float b)
+{
+    return fabs(a-b) < EPSILON;
+}
+
+static int procamp_vaapi_build_filter_params(AVFilterContext *avctx)
+{
+    VAAPIVPPContext *vpp_ctx = avctx->priv;
+    ProcampVAAPIContext *ctx = avctx->priv;
+    VAStatus vas;
+    VAProcFilterParameterBufferColorBalance procamp_params[4];
+    VAProcFilterCapColorBalance procamp_caps[VAProcColorBalanceCount];
+    int num_caps;
+    int i = 0;
+
+    memset(&procamp_params, 0, sizeof(procamp_params));
+    memset(&procamp_caps, 0, sizeof(procamp_caps));
+
+    num_caps = VAProcColorBalanceCount;
+    vas = vaQueryVideoProcFilterCaps(vpp_ctx->hwctx->display, vpp_ctx->va_context,
+                                     VAProcFilterColorBalance, &procamp_caps, &num_caps);
+
+    if (vas != VA_STATUS_SUCCESS) {
+        av_log(avctx, AV_LOG_ERROR, "Failed to query procamp "
+               "filter caps: %d (%s).\n", vas, vaErrorStr(vas));
+        return AVERROR(EIO);
+    }
+
+    if (!fequal(ctx->bright, BRIGHTNESS_DEFAULT)) {
+        procamp_params[i].type   = VAProcFilterColorBalance;
+        procamp_params[i].attrib = VAProcColorBalanceBrightness;
+        procamp_params[i].value  = map(ctx->bright, BRIGHTNESS_MIN, BRIGHTNESS_MAX,
+                                       procamp_caps[VAProcColorBalanceBrightness-1].range.min_value,
+                                       procamp_caps[VAProcColorBalanceBrightness-1].range.max_value);
+        i++;
+    }
+
+    if (!fequal(ctx->contrast, CONTRAST_DEFAULT)) {
+        procamp_params[i].type   = VAProcFilterColorBalance;
+        procamp_params[i].attrib = VAProcColorBalanceContrast;
+        procamp_params[i].value  = map(ctx->contrast, CONTRAST_MIN, CONTRAST_MAX,
+                                       procamp_caps[VAProcColorBalanceContrast-1].range.min_value,
+                                       procamp_caps[VAProcColorBalanceContrast-1].range.max_value);
+        i++;
+    }
+
+    if (!fequal(ctx->hue, HUE_DEFAULT)) {
+        procamp_params[i].type   = VAProcFilterColorBalance;
+        procamp_params[i].attrib = VAProcColorBalanceHue;
+        procamp_params[i].value  = map(ctx->hue, HUE_MIN, HUE_MAX,
+                                       procamp_caps[VAProcColorBalanceHue-1].range.min_value,
+                                       procamp_caps[VAProcColorBalanceHue-1].range.max_value);
+        i++;
+    }
+
+    if (!fequal(ctx->saturation, SATURATION_DEFAULT)) {
+        procamp_params[i].type   = VAProcFilterColorBalance;
+        procamp_params[i].attrib = VAProcColorBalanceSaturation;
+        procamp_params[i].value  = map(ctx->saturation, SATURATION_MIN, SATURATION_MAX,
+                                       procamp_caps[VAProcColorBalanceSaturation-1].range.min_value,
+                                       procamp_caps[VAProcColorBalanceSaturation-1].range.max_value);
+        i++;
+    }
+
+    return ff_vaapi_vpp_make_param_buffers(avctx,
+                                           VAProcFilterParameterBufferType,
+                                           &procamp_params,
+                                           sizeof(procamp_params[0]),
+                                           i);
+}
+
+static int procamp_vaapi_filter_frame(AVFilterLink *inlink, AVFrame *input_frame)
+{
+    AVFilterContext *avctx   = inlink->dst;
+    AVFilterLink *outlink    = avctx->outputs[0];
+    VAAPIVPPContext *vpp_ctx = avctx->priv;
+    AVFrame *output_frame = NULL;
+    VASurfaceID input_surface, output_surface;
+    VAProcPipelineParameterBuffer params;
+    VARectangle input_region;
+    int err;
+
+    av_log(avctx, AV_LOG_DEBUG, "Filter input: %s, %ux%u (%"PRId64").\n",
+           av_get_pix_fmt_name(input_frame->format),
+           input_frame->width, input_frame->height, input_frame->pts);
+
+    if (vpp_ctx->va_context == VA_INVALID_ID)
+        return AVERROR(EINVAL);
+
+    input_surface = (VASurfaceID)(uintptr_t)input_frame->data[3];
+    av_log(avctx, AV_LOG_DEBUG, "Using surface %#x for procamp input.\n",
+           input_surface);
+
+    output_frame = ff_get_video_buffer(outlink, vpp_ctx->output_width,
+                                       vpp_ctx->output_height);
+    if (!output_frame) {
+        err = AVERROR(ENOMEM);
+        goto fail;
+    }
+
+    output_surface = (VASurfaceID)(uintptr_t)output_frame->data[3];
+    av_log(avctx, AV_LOG_DEBUG, "Using surface %#x for procamp output.\n",
+           output_surface);
+    memset(&params, 0, sizeof(params));
+    input_region = (VARectangle) {
+        .x      = 0,
+        .y      = 0,
+        .width  = input_frame->width,
+        .height = input_frame->height,
+    };
+
+    params.surface = input_surface;
+    params.surface_region = &input_region;
+    params.surface_color_standard =
+        ff_vaapi_vpp_colour_standard(input_frame->colorspace);
+
+    params.output_region = NULL;
+    params.output_background_color = 0xff000000;
+    params.output_color_standard = params.surface_color_standard;
+
+    params.pipeline_flags = 0;
+    params.filter_flags = VA_FRAME_PICTURE;
+
+    params.filters     = &vpp_ctx->filter_buffers[0];
+    params.num_filters = 1;
+
+    err = ff_vaapi_vpp_render_picture(avctx, &params, output_surface);
+    if (err < 0)
+        goto fail;
+
+    err = av_frame_copy_props(output_frame, input_frame);
+    if (err < 0)
+        goto fail;
+    av_frame_free(&input_frame);
+
+    av_log(avctx, AV_LOG_DEBUG, "Filter output: %s, %ux%u (%"PRId64").\n",
+           av_get_pix_fmt_name(output_frame->format),
+           output_frame->width, output_frame->height, output_frame->pts);
+
+    return ff_filter_frame(outlink, output_frame);
+
+fail:
+    av_frame_free(&input_frame);
+    av_frame_free(&output_frame);
+    return err;
+}
+
+static av_cold int procamp_vaapi_init(AVFilterContext *avctx)
+{
+    VAAPIVPPContext *vpp_ctx = avctx->priv;
+
+    ff_vaapi_vpp_ctx_init(avctx);
+    vpp_ctx->pipeline_uninit     = ff_vaapi_vpp_pipeline_uninit;
+    vpp_ctx->build_filter_params = procamp_vaapi_build_filter_params;
+    vpp_ctx->output_format       = AV_PIX_FMT_NONE;
+
+    return 0;
+}
+
+#define OFFSET(x) offsetof(ProcampVAAPIContext, x)
+#define FLAGS (AV_OPT_FLAG_VIDEO_PARAM)
+static const AVOption procamp_vaapi_options[] = {
+    { "b", "Output video brightness",
+      OFFSET(bright),  AV_OPT_TYPE_FLOAT, { .dbl = BRIGHTNESS_DEFAULT }, BRIGHTNESS_MIN, BRIGHTNESS_MAX, .flags = FLAGS },
+    { "brightness", "Output video brightness",
+      OFFSET(bright),  AV_OPT_TYPE_FLOAT, { .dbl = BRIGHTNESS_DEFAULT }, BRIGHTNESS_MIN, BRIGHTNESS_MAX, .flags = FLAGS },
+    { "s", "Output video saturation",
+      OFFSET(saturation), AV_OPT_TYPE_FLOAT, { .dbl = SATURATION_DEFAULT }, SATURATION_MIN, SATURATION_MAX, .flags = FLAGS },
+    { "saturatio", "Output video saturation",
+      OFFSET(saturation), AV_OPT_TYPE_FLOAT, { .dbl = SATURATION_DEFAULT }, SATURATION_MIN, SATURATION_MAX, .flags = FLAGS },
+    { "c", "Output video contrast",
+      OFFSET(contrast),  AV_OPT_TYPE_FLOAT, { .dbl = CONTRAST_DEFAULT }, CONTRAST_MIN, CONTRAST_MAX, .flags = FLAGS },
+    { "contrast", "Output video contrast",
+      OFFSET(contrast),  AV_OPT_TYPE_FLOAT, { .dbl = CONTRAST_DEFAULT }, CONTRAST_MIN, CONTRAST_MAX, .flags = FLAGS },
+    { "h", "Output video hue",
+      OFFSET(hue), AV_OPT_TYPE_FLOAT, { .dbl = HUE_DEFAULT }, HUE_MIN, HUE_MAX, .flags = FLAGS },
+    { "hue", "Output video hue",
+      OFFSET(hue), AV_OPT_TYPE_FLOAT, { .dbl = HUE_DEFAULT }, HUE_MIN, HUE_MAX, .flags = FLAGS },
+    { NULL },
+};
+
+AVFILTER_DEFINE_CLASS(procamp_vaapi);
+
+static const AVFilterPad procamp_vaapi_inputs[] = {
+    {
+        .name         = "default",
+        .type         = AVMEDIA_TYPE_VIDEO,
+        .filter_frame = &procamp_vaapi_filter_frame,
+        .config_props = &ff_vaapi_vpp_config_input,
+    },
+    { NULL }
+};
+
+static const AVFilterPad procamp_vaapi_outputs[] = {
+    {
+        .name = "default",
+        .type = AVMEDIA_TYPE_VIDEO,
+        .config_props = &ff_vaapi_vpp_config_output,
+    },
+    { NULL }
+};
+
+AVFilter ff_vf_procamp_vaapi = {
+    .name          = "procamp_vaapi",
+    .description   = NULL_IF_CONFIG_SMALL("ProcAmp (color balance) adjustments for hue, saturation, brightness, contrast"),
+    .priv_size     = sizeof(ProcampVAAPIContext),
+    .init          = &procamp_vaapi_init,
+    .uninit        = &ff_vaapi_vpp_ctx_uninit,
+    .query_formats = &ff_vaapi_vpp_query_formats,
+    .inputs        = procamp_vaapi_inputs,
+    .outputs       = procamp_vaapi_outputs,
+    .priv_class    = &procamp_vaapi_class,
+    .flags_internal = FF_FILTER_FLAG_HWFRAME_AWARE,
+};