[FFmpeg-devel] [WIP][RFC][PATCH] avfilter: add zscale filter
Paul B Mahol
onemda at gmail.com
Mon Sep 21 21:22:25 CEST 2015
Signed-off-by: Paul B Mahol <onemda at gmail.com>
---
configure | 4 +
libavfilter/Makefile | 1 +
libavfilter/allfilters.c | 1 +
libavfilter/vf_zscale.c | 546 +++++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 552 insertions(+)
create mode 100644 libavfilter/vf_zscale.c
diff --git a/configure b/configure
index d2a25bb..fffa934 100755
--- a/configure
+++ b/configure
@@ -269,6 +269,7 @@ External library support:
--enable-libxcb-shape enable X11 grabbing shape rendering [autodetect]
--enable-libxvid enable Xvid encoding via xvidcore,
native MPEG-4/Xvid encoder exists [no]
+ --enable-libzimg enable zimg, needed for zscale filter [no]
--enable-libzmq enable message passing via libzmq [no]
--enable-libzvbi enable teletext support via libzvbi [no]
--disable-lzma disable lzma [autodetect]
@@ -1435,6 +1436,7 @@ EXTERNAL_LIBRARY_LIST="
libxcb_shape
libxcb_xfixes
libxvid
+ libzimg
libzmq
libzvbi
lzma
@@ -2817,6 +2819,7 @@ tinterlace_pad_test_deps="tinterlace_filter"
uspp_filter_deps="gpl avcodec"
zmq_filter_deps="libzmq"
zoompan_filter_deps="swscale"
+zscale_filter_deps="libzimg"
# examples
avio_reading="avformat avcodec avutil"
@@ -5341,6 +5344,7 @@ enabled libx265 && require_pkg_config x265 x265.h x265_api_get &&
die "ERROR: libx265 version must be >= 57."; }
enabled libxavs && require libxavs xavs.h xavs_encoder_encode -lxavs
enabled libxvid && require libxvid xvid.h xvid_global -lxvidcore
+enabled libzimg && require_pkg_config zimg zimg3.h zimg2_get_api_version
enabled libzmq && require_pkg_config libzmq zmq.h zmq_ctx_new
enabled libzvbi && require libzvbi libzvbi.h vbi_decoder_new -lzvbi
enabled mmal && { check_lib interface/mmal/mmal.h mmal_port_connect -lmmal_core -lmmal_util -lmmal_vc_client -lbcm_host ||
diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index 4bbe972..ccc2f02 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -240,6 +240,7 @@ OBJS-$(CONFIG_XBR_FILTER) += vf_xbr.o
OBJS-$(CONFIG_YADIF_FILTER) += vf_yadif.o
OBJS-$(CONFIG_ZMQ_FILTER) += f_zmq.o
OBJS-$(CONFIG_ZOOMPAN_FILTER) += vf_zoompan.o
+OBJS-$(CONFIG_ZSCALE_FILTER) += vf_zscale.o
OBJS-$(CONFIG_ALLRGB_FILTER) += vsrc_testsrc.o
OBJS-$(CONFIG_ALLYUV_FILTER) += vsrc_testsrc.o
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index 3b3a49f..56696f8 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -261,6 +261,7 @@ void avfilter_register_all(void)
REGISTER_FILTER(YADIF, yadif, vf);
REGISTER_FILTER(ZMQ, zmq, vf);
REGISTER_FILTER(ZOOMPAN, zoompan, vf);
+ REGISTER_FILTER(ZSCALE, zscale, vf);
REGISTER_FILTER(ALLRGB, allrgb, vsrc);
REGISTER_FILTER(ALLYUV, allyuv, vsrc);
diff --git a/libavfilter/vf_zscale.c b/libavfilter/vf_zscale.c
new file mode 100644
index 0000000..74bdb49
--- /dev/null
+++ b/libavfilter/vf_zscale.c
@@ -0,0 +1,546 @@
+/*
+ * Copyright (c) 2015 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
+ */
+
+/**
+ * @file
+ * zscale video filter using zimg library
+ */
+
+#include <stdio.h>
+#include <string.h>
+
+#include <zimg3.h>
+
+#include "avfilter.h"
+#include "formats.h"
+#include "internal.h"
+#include "video.h"
+#include "libavutil/avstring.h"
+#include "libavutil/eval.h"
+#include "libavutil/internal.h"
+#include "libavutil/mathematics.h"
+#include "libavutil/opt.h"
+#include "libavutil/parseutils.h"
+#include "libavutil/pixdesc.h"
+#include "libavutil/imgutils.h"
+#include "libavutil/avassert.h"
+
+static const char *const var_names[] = {
+ "in_w", "iw",
+ "in_h", "ih",
+ "out_w", "ow",
+ "out_h", "oh",
+ "a",
+ "sar",
+ "dar",
+ "hsub",
+ "vsub",
+ "ohsub",
+ "ovsub",
+ NULL
+};
+
+enum var_name {
+ VAR_IN_W, VAR_IW,
+ VAR_IN_H, VAR_IH,
+ VAR_OUT_W, VAR_OW,
+ VAR_OUT_H, VAR_OH,
+ VAR_A,
+ VAR_SAR,
+ VAR_DAR,
+ VAR_HSUB,
+ VAR_VSUB,
+ VAR_OHSUB,
+ VAR_OVSUB,
+ VARS_NB
+};
+
+typedef struct ZScaleContext {
+ const AVClass *class;
+
+ /**
+ * New dimensions. Special values are:
+ * 0 = original width/height
+ * -1 = keep original aspect
+ * -N = try to keep aspect but make sure it is divisible by N
+ */
+ int w, h;
+ int dither;
+ int filter;
+ char *size_str;
+
+ char *w_expr; ///< width expression string
+ char *h_expr; ///< height expression string
+
+ int in_range;
+ int out_range;
+
+ int out_h_chr_pos;
+ int out_v_chr_pos;
+ int in_h_chr_pos;
+ int in_v_chr_pos;
+
+ int force_original_aspect_ratio;
+} ZScaleContext;
+
+static av_cold int init_dict(AVFilterContext *ctx, AVDictionary **opts)
+{
+ ZScaleContext *s = ctx->priv;
+ int ret;
+
+ if (s->size_str && (s->w_expr || s->h_expr)) {
+ av_log(ctx, AV_LOG_ERROR,
+ "Size and width/height expressions cannot be set at the same time.\n");
+ return AVERROR(EINVAL);
+ }
+
+ if (s->w_expr && !s->h_expr)
+ FFSWAP(char *, s->w_expr, s->size_str);
+
+ if (s->size_str) {
+ char buf[32];
+ if ((ret = av_parse_video_size(&s->w, &s->h, s->size_str)) < 0) {
+ av_log(ctx, AV_LOG_ERROR,
+ "Invalid size '%s'\n", s->size_str);
+ return ret;
+ }
+ snprintf(buf, sizeof(buf)-1, "%d", s->w);
+ av_opt_set(s, "w", buf, 0);
+ snprintf(buf, sizeof(buf)-1, "%d", s->h);
+ av_opt_set(s, "h", buf, 0);
+ }
+ if (!s->w_expr)
+ av_opt_set(s, "w", "iw", 0);
+ if (!s->h_expr)
+ av_opt_set(s, "h", "ih", 0);
+
+ return 0;
+}
+
+static int query_formats(AVFilterContext *ctx)
+{
+ static const enum AVPixelFormat pixel_fmts[] = {
+ AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P,
+ AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P,
+ AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P,
+ AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P,
+ AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ444P,
+ AV_PIX_FMT_YUVJ411P,
+ AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
+ AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
+ AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12,
+ AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14,
+ AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
+ AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
+ AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
+ AV_PIX_FMT_NONE
+ };
+
+ ff_formats_ref(ff_make_format_list(pixel_fmts), &ctx->inputs[0]->out_formats);
+ ff_formats_ref(ff_make_format_list(pixel_fmts), &ctx->outputs[0]->in_formats);
+
+ return 0;
+}
+
+static int config_props(AVFilterLink *outlink)
+{
+ AVFilterContext *ctx = outlink->src;
+ AVFilterLink *inlink = outlink->src->inputs[0];
+ ZScaleContext *s = ctx->priv;
+ const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
+ const AVPixFmtDescriptor *out_desc = av_pix_fmt_desc_get(outlink->format);
+ int64_t w, h;
+ double var_values[VARS_NB], res;
+ char *expr;
+ int ret;
+ int factor_w, factor_h;
+
+ var_values[VAR_IN_W] = var_values[VAR_IW] = inlink->w;
+ var_values[VAR_IN_H] = var_values[VAR_IH] = inlink->h;
+ var_values[VAR_OUT_W] = var_values[VAR_OW] = NAN;
+ var_values[VAR_OUT_H] = var_values[VAR_OH] = NAN;
+ var_values[VAR_A] = (double) inlink->w / inlink->h;
+ var_values[VAR_SAR] = inlink->sample_aspect_ratio.num ?
+ (double) inlink->sample_aspect_ratio.num / inlink->sample_aspect_ratio.den : 1;
+ var_values[VAR_DAR] = var_values[VAR_A] * var_values[VAR_SAR];
+ var_values[VAR_HSUB] = 1 << desc->log2_chroma_w;
+ var_values[VAR_VSUB] = 1 << desc->log2_chroma_h;
+ var_values[VAR_OHSUB] = 1 << out_desc->log2_chroma_w;
+ var_values[VAR_OVSUB] = 1 << out_desc->log2_chroma_h;
+
+ /* evaluate width and height */
+ av_expr_parse_and_eval(&res, (expr = s->w_expr),
+ var_names, var_values,
+ NULL, NULL, NULL, NULL, NULL, 0, ctx);
+ s->w = var_values[VAR_OUT_W] = var_values[VAR_OW] = res;
+ if ((ret = av_expr_parse_and_eval(&res, (expr = s->h_expr),
+ var_names, var_values,
+ NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0)
+ goto fail;
+ s->h = var_values[VAR_OUT_H] = var_values[VAR_OH] = res;
+ /* evaluate again the width, as it may depend on the output height */
+ if ((ret = av_expr_parse_and_eval(&res, (expr = s->w_expr),
+ var_names, var_values,
+ NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0)
+ goto fail;
+ s->w = res;
+
+ w = s->w;
+ h = s->h;
+
+ /* Check if it is requested that the result has to be divisible by a some
+ * factor (w or h = -n with n being the factor). */
+ factor_w = 1;
+ factor_h = 1;
+ if (w < -1) {
+ factor_w = -w;
+ }
+ if (h < -1) {
+ factor_h = -h;
+ }
+
+ if (w < 0 && h < 0)
+ s->w = s->h = 0;
+
+ if (!(w = s->w))
+ w = inlink->w;
+ if (!(h = s->h))
+ h = inlink->h;
+
+ /* Make sure that the result is divisible by the factor we determined
+ * earlier. If no factor was set, it is nothing will happen as the default
+ * factor is 1 */
+ if (w < 0)
+ w = av_rescale(h, inlink->w, inlink->h * factor_w) * factor_w;
+ if (h < 0)
+ h = av_rescale(w, inlink->h, inlink->w * factor_h) * factor_h;
+
+ /* Note that force_original_aspect_ratio may overwrite the previous set
+ * dimensions so that it is not divisible by the set factors anymore. */
+ if (s->force_original_aspect_ratio) {
+ int tmp_w = av_rescale(h, inlink->w, inlink->h);
+ int tmp_h = av_rescale(w, inlink->h, inlink->w);
+
+ if (s->force_original_aspect_ratio == 1) {
+ w = FFMIN(tmp_w, w);
+ h = FFMIN(tmp_h, h);
+ } else {
+ w = FFMAX(tmp_w, w);
+ h = FFMAX(tmp_h, h);
+ }
+ }
+
+ if (w > INT_MAX || h > INT_MAX ||
+ (h * inlink->w) > INT_MAX ||
+ (w * inlink->h) > INT_MAX)
+ av_log(ctx, AV_LOG_ERROR, "Rescaled value for width or height is too big.\n");
+
+ outlink->w = w;
+ outlink->h = h;
+
+ if (inlink->w == outlink->w &&
+ inlink->h == outlink->h &&
+ s->in_range == s->out_range &&
+ inlink->format == outlink->format)
+ ;
+ else {
+ }
+
+ if (inlink->sample_aspect_ratio.num){
+ outlink->sample_aspect_ratio = av_mul_q((AVRational){outlink->h * inlink->w, outlink->w * inlink->h}, inlink->sample_aspect_ratio);
+ } else
+ outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
+
+ av_log(ctx, AV_LOG_VERBOSE, "w:%d h:%d fmt:%s sar:%d/%d -> w:%d h:%d fmt:%s sar:%d/%d\n",
+ inlink ->w, inlink ->h, av_get_pix_fmt_name( inlink->format),
+ inlink->sample_aspect_ratio.num, inlink->sample_aspect_ratio.den,
+ outlink->w, outlink->h, av_get_pix_fmt_name(outlink->format),
+ outlink->sample_aspect_ratio.num, outlink->sample_aspect_ratio.den);
+ return 0;
+
+fail:
+ av_log(ctx, AV_LOG_ERROR,
+ "Error when evaluating the expression '%s'.\n"
+ "Maybe the expression for out_w:'%s' or for out_h:'%s' is self-referencing.\n",
+ expr, s->w_expr, s->h_expr);
+ return ret;
+}
+
+static int print_zimg_error(AVFilterContext *ctx)
+{
+ char err_msg[1024];
+ int err_code = zimg_get_last_error(err_msg, sizeof(err_msg));
+
+ av_log(ctx, AV_LOG_ERROR, "code %d: %s\n", err_code, err_msg);
+
+ return err_code;
+}
+
+static int convert_trc(enum AVColorTransferCharacteristic color_trc)
+{
+ switch (color_trc) {
+ case AVCOL_TRC_UNSPECIFIED:
+ return ZIMG_TRANSFER_UNSPECIFIED;
+ case AVCOL_TRC_BT709:
+ return ZIMG_TRANSFER_709;
+ case AVCOL_TRC_SMPTE170M:
+ return ZIMG_TRANSFER_601;
+ case AVCOL_TRC_LINEAR:
+ return ZIMG_TRANSFER_LINEAR;
+ case AVCOL_TRC_BT2020_10:
+ return ZIMG_TRANSFER_2020_10;
+ case AVCOL_TRC_BT2020_12:
+ return ZIMG_TRANSFER_2020_12;
+ }
+ return ZIMG_TRANSFER_UNSPECIFIED;
+}
+
+static int convert_primaries(enum AVColorPrimaries color_primaries)
+{
+ switch (color_primaries) {
+ case AVCOL_PRI_UNSPECIFIED:
+ return ZIMG_PRIMARIES_UNSPECIFIED;
+ case AVCOL_PRI_BT709:
+ return ZIMG_PRIMARIES_709;
+ case AVCOL_PRI_SMPTE170M:
+ return ZIMG_PRIMARIES_170M;
+ case AVCOL_PRI_SMPTE240M:
+ return ZIMG_PRIMARIES_240M;
+ case AVCOL_PRI_BT2020:
+ return ZIMG_PRIMARIES_2020;
+ }
+ return ZIMG_PRIMARIES_UNSPECIFIED;
+}
+
+static int filter_frame(AVFilterLink *link, AVFrame *in)
+{
+ ZScaleContext *s = link->dst->priv;
+ AVFilterLink *outlink = link->dst->outputs[0];
+ const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(link->format);
+ const AVPixFmtDescriptor *odesc = av_pix_fmt_desc_get(outlink->format);
+ zimg_image_buffer_const src_buf = { ZIMG_API_VERSION };
+ zimg_image_buffer dst_buf = { { ZIMG_API_VERSION } };
+ zimg_image_format src_format, dst_format;
+ zimg_filter_graph_params params;
+ zimg_filter_graph *graph;
+ char buf[32];
+ size_t tmp_size;
+ int in_range, ret = 0, plane;
+ AVFrame *out;
+ void *tmp = NULL;
+
+ if (av_frame_get_colorspace(in) == AVCOL_SPC_YCGCO)
+ av_log(link->dst, AV_LOG_WARNING, "Detected unsupported YCgCo colorspace.\n");
+
+ if( in->width != link->w
+ || in->height != link->h
+ || in->format != link->format) {
+ snprintf(buf, sizeof(buf)-1, "%d", outlink->w);
+ av_opt_set(s, "w", buf, 0);
+ snprintf(buf, sizeof(buf)-1, "%d", outlink->h);
+ av_opt_set(s, "h", buf, 0);
+
+ link->dst->inputs[0]->format = in->format;
+ link->dst->inputs[0]->w = in->width;
+ link->dst->inputs[0]->h = in->height;
+
+ if ((ret = config_props(outlink)) < 0)
+ return ret;
+ }
+
+ out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
+ if (!out) {
+ av_frame_free(&in);
+ return AVERROR(ENOMEM);
+ }
+
+ av_frame_copy_props(out, in);
+ out->width = outlink->w;
+ out->height = outlink->h;
+
+ in_range = av_frame_get_color_range(in);
+
+ av_reduce(&out->sample_aspect_ratio.num, &out->sample_aspect_ratio.den,
+ (int64_t)in->sample_aspect_ratio.num * outlink->h * link->w,
+ (int64_t)in->sample_aspect_ratio.den * outlink->w * link->h,
+ INT_MAX);
+
+ zimg2_image_format_default(&src_format, ZIMG_API_VERSION);
+ zimg2_image_format_default(&dst_format, ZIMG_API_VERSION);
+ zimg2_filter_graph_params_default(¶ms, ZIMG_API_VERSION);
+
+ params.dither_type = s->dither;
+ params.cpu_type = ZIMG_CPU_AUTO;
+ params.resample_filter = s->filter;
+ params.resample_filter_uv = s->filter;
+
+ src_format.width = in->width;
+ src_format.height = in->height;
+ src_format.subsample_w = desc->log2_chroma_w;
+ src_format.subsample_h = desc->log2_chroma_h;
+ src_format.depth = desc->comp[0].depth;
+ src_format.pixel_type = desc->comp[0].depth > 8 ? ZIMG_PIXEL_WORD : ZIMG_PIXEL_BYTE;
+ src_format.color_family = (desc->flags & AV_PIX_FMT_FLAG_RGB) ? ZIMG_COLOR_RGB : ZIMG_COLOR_YUV;
+ src_format.matrix_coefficients = (desc->flags & AV_PIX_FMT_FLAG_RGB) ? ZIMG_MATRIX_RGB : ZIMG_MATRIX_UNSPECIFIED;
+ src_format.transfer_characteristics = (desc->flags & AV_PIX_FMT_FLAG_RGB) ? ZIMG_TRANSFER_UNSPECIFIED : convert_trc(in->color_trc);
+ src_format.color_primaries = (desc->flags & AV_PIX_FMT_FLAG_RGB) ? ZIMG_PRIMARIES_UNSPECIFIED : convert_primaries(in->color_primaries);
+
+ dst_format.width = out->width;
+ dst_format.height = out->height;
+ dst_format.subsample_w = odesc->log2_chroma_w;
+ dst_format.subsample_h = odesc->log2_chroma_h;
+ dst_format.depth = odesc->comp[0].depth;
+ dst_format.pixel_type = dst_format.depth > 8 ? ZIMG_PIXEL_WORD : ZIMG_PIXEL_BYTE;
+ dst_format.color_family = (odesc->flags & AV_PIX_FMT_FLAG_RGB) ? ZIMG_COLOR_RGB : ZIMG_COLOR_YUV;
+ dst_format.matrix_coefficients = (odesc->flags & AV_PIX_FMT_FLAG_RGB) ? ZIMG_MATRIX_RGB : ZIMG_MATRIX_UNSPECIFIED;
+ dst_format.transfer_characteristics = (odesc->flags & AV_PIX_FMT_FLAG_RGB) ? ZIMG_TRANSFER_UNSPECIFIED : convert_trc(out->color_trc);
+ dst_format.color_primaries = (odesc->flags & AV_PIX_FMT_FLAG_RGB) ? ZIMG_PRIMARIES_UNSPECIFIED : convert_primaries(out->color_primaries);
+
+ graph = zimg2_filter_graph_build(&src_format, &dst_format, ¶ms);
+ if (!graph) {
+ ret = print_zimg_error(link->dst);
+ goto fail;
+ }
+
+ if ((ret = zimg2_filter_graph_get_tmp_size(graph, &tmp_size))) {
+ ret = print_zimg_error(link->dst);
+ goto fail;
+ }
+
+ tmp = av_malloc(tmp_size);
+ if (!tmp) {
+ ret = AVERROR(ENOMEM);
+ goto fail;
+ }
+
+ for (plane = 0; plane < 3; plane++) {
+ int p = desc->comp[plane].plane;
+ src_buf.data[plane] = in->data[p];
+ src_buf.stride[plane] = in->linesize[p];
+ src_buf.mask[plane] = -1;
+
+ p = odesc->comp[plane].plane;
+ dst_buf.m.data[plane] = out->data[p];
+ dst_buf.m.stride[plane] = out->linesize[p];
+ dst_buf.m.mask[plane] = -1;
+ }
+
+ ret = zimg2_filter_graph_process(graph, &src_buf, &dst_buf, tmp, 0, 0, 0, 0);
+ if (ret) {
+ print_zimg_error(link->dst);
+ goto fail;
+ }
+fail:
+ av_frame_free(&in);
+ zimg2_filter_graph_free(graph);
+ av_freep(&tmp);
+ if (ret)
+ return ret;
+ return ff_filter_frame(outlink, out);
+}
+
+static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
+ char *res, int res_len, int flags)
+{
+ ZScaleContext *s = ctx->priv;
+ int ret;
+
+ if ( !strcmp(cmd, "width") || !strcmp(cmd, "w")
+ || !strcmp(cmd, "height") || !strcmp(cmd, "h")) {
+
+ int old_w = s->w;
+ int old_h = s->h;
+ AVFilterLink *outlink = ctx->outputs[0];
+
+ av_opt_set(s, cmd, args, 0);
+ if ((ret = config_props(outlink)) < 0) {
+ s->w = old_w;
+ s->h = old_h;
+ }
+ } else
+ ret = AVERROR(ENOSYS);
+
+ return ret;
+}
+
+#define OFFSET(x) offsetof(ZScaleContext, x)
+#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
+
+static const AVOption zscale_options[] = {
+ { "w", "Output video width", OFFSET(w_expr), AV_OPT_TYPE_STRING, .flags = FLAGS },
+ { "width", "Output video width", OFFSET(w_expr), AV_OPT_TYPE_STRING, .flags = FLAGS },
+ { "h", "Output video height", OFFSET(h_expr), AV_OPT_TYPE_STRING, .flags = FLAGS },
+ { "height", "Output video height", OFFSET(h_expr), AV_OPT_TYPE_STRING, .flags = FLAGS },
+ { "size", "set video size", OFFSET(size_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS },
+ { "s", "set video size", OFFSET(size_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS },
+ { "dither", "set dither type", OFFSET(dither), AV_OPT_TYPE_INT, {.i64 = 0}, 0, ZIMG_DITHER_ERROR_DIFFUSION, FLAGS, "dither" },
+ { "d", "set dither type", OFFSET(dither), AV_OPT_TYPE_INT, {.i64 = 0}, 0, ZIMG_DITHER_ERROR_DIFFUSION, FLAGS, "dither" },
+ { "none", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_DITHER_NONE}, 0, 0, FLAGS, "dither" },
+ { "ordered", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_DITHER_ORDERED}, 0, 0, FLAGS, "dither" },
+ { "random", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_DITHER_RANDOM}, 0, 0, FLAGS, "dither" },
+ { "error_diffusion", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_DITHER_ERROR_DIFFUSION}, 0, 0, FLAGS, "dither" },
+ { "filter", "set filter type", OFFSET(filter), AV_OPT_TYPE_INT, {.i64 = ZIMG_RESIZE_BILINEAR}, 0, ZIMG_RESIZE_LANCZOS, FLAGS, "filter" },
+ { "f", "set filter type", OFFSET(filter), AV_OPT_TYPE_INT, {.i64 = ZIMG_RESIZE_BILINEAR}, 0, ZIMG_RESIZE_LANCZOS, FLAGS, "filter" },
+ { "point", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_RESIZE_POINT}, 0, 0, FLAGS, "filter" },
+ { "bilinear", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_RESIZE_BILINEAR}, 0, 0, FLAGS, "filter" },
+ { "bicubic", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_RESIZE_BICUBIC}, 0, 0, FLAGS, "filter" },
+ { "spline16", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_RESIZE_SPLINE16}, 0, 0, FLAGS, "filter" },
+ { "splite36", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_RESIZE_SPLINE36}, 0, 0, FLAGS, "filter" },
+ { "lanczos", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_RESIZE_LANCZOS}, 0, 0, FLAGS, "filter" },
+ { NULL }
+};
+
+static const AVClass zscale_class = {
+ .class_name = "zscale",
+ .item_name = av_default_item_name,
+ .option = zscale_options,
+ .version = LIBAVUTIL_VERSION_INT,
+ .category = AV_CLASS_CATEGORY_FILTER,
+};
+
+static const AVFilterPad avfilter_vf_zscale_inputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .filter_frame = filter_frame,
+ },
+ { NULL }
+};
+
+static const AVFilterPad avfilter_vf_zscale_outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .config_props = config_props,
+ },
+ { NULL }
+};
+
+AVFilter ff_vf_zscale = {
+ .name = "zscale",
+ .description = NULL_IF_CONFIG_SMALL("Apply resizing, colorspace and bit depth conversion."),
+ .init_dict = init_dict,
+ .query_formats = query_formats,
+ .priv_size = sizeof(ZScaleContext),
+ .priv_class = &zscale_class,
+ .inputs = avfilter_vf_zscale_inputs,
+ .outputs = avfilter_vf_zscale_outputs,
+ .process_command = process_command,
+};
--
1.9.1
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