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https://github.com/FFmpeg/FFmpeg.git
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790f793844
There are lots of files that don't need it: The number of object files that actually need it went down from 2011 to 884 here. Keep it for external users in order to not cause breakages. Also improve the other headers a bit while just at it. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
107 lines
3.9 KiB
C
107 lines
3.9 KiB
C
/**
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "film_grain_params.h"
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#include "mem.h"
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#include "pixdesc.h"
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AVFilmGrainParams *av_film_grain_params_alloc(size_t *size)
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{
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AVFilmGrainParams *params = av_mallocz(sizeof(AVFilmGrainParams));
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if (size)
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*size = sizeof(*params);
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return params;
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}
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AVFilmGrainParams *av_film_grain_params_create_side_data(AVFrame *frame)
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{
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AVFilmGrainParams *fgp;
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AVFrameSideData *side_data = av_frame_new_side_data(frame,
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AV_FRAME_DATA_FILM_GRAIN_PARAMS,
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sizeof(AVFilmGrainParams));
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if (!side_data)
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return NULL;
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fgp = (AVFilmGrainParams *) side_data->data;
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*fgp = (AVFilmGrainParams) {
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.color_range = AVCOL_RANGE_UNSPECIFIED,
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.color_primaries = AVCOL_PRI_UNSPECIFIED,
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.color_trc = AVCOL_TRC_UNSPECIFIED,
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.color_space = AVCOL_SPC_UNSPECIFIED,
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};
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return fgp;
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}
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const AVFilmGrainParams *av_film_grain_params_select(const AVFrame *frame)
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{
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const AVFilmGrainParams *fgp, *best = NULL;
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(frame->format);
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int bit_depth_luma, bit_depth_chroma;
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if (!desc)
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return NULL;
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/* There are no YUV formats with different bit depth per component,
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* so just check both against the first component for simplicity */
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bit_depth_luma = bit_depth_chroma = desc->comp[0].depth;
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for (int i = 0; i < frame->nb_side_data; i++) {
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if (frame->side_data[i]->type != AV_FRAME_DATA_FILM_GRAIN_PARAMS)
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continue;
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fgp = (const AVFilmGrainParams*)frame->side_data[i]->data;
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if (fgp->width && fgp->width > frame->width ||
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fgp->height && fgp->height > frame->height)
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continue;
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#define CHECK(a, b, unspec) \
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if ((a) != (unspec) && (b) != (unspec) && (a) != (b)) \
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continue
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CHECK(fgp->bit_depth_luma, bit_depth_luma, 0);
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CHECK(fgp->bit_depth_chroma, bit_depth_chroma, 0);
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CHECK(fgp->color_range, frame->color_range, AVCOL_RANGE_UNSPECIFIED);
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CHECK(fgp->color_primaries, frame->color_primaries, AVCOL_PRI_UNSPECIFIED);
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CHECK(fgp->color_trc, frame->color_trc, AVCOL_TRC_UNSPECIFIED);
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CHECK(fgp->color_space, frame->colorspace, AVCOL_SPC_UNSPECIFIED);
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switch (fgp->type) {
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case AV_FILM_GRAIN_PARAMS_NONE:
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continue;
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case AV_FILM_GRAIN_PARAMS_AV1:
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/* AOM FGS needs an exact match for the chroma resolution */
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if (fgp->subsampling_x != desc->log2_chroma_w ||
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fgp->subsampling_y != desc->log2_chroma_h)
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continue;
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break;
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case AV_FILM_GRAIN_PARAMS_H274:
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/* H.274 FGS can be adapted to any lower chroma resolution */
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if (fgp->subsampling_x > desc->log2_chroma_w ||
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fgp->subsampling_y > desc->log2_chroma_h)
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continue;
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break;
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}
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if (!best || best->width < fgp->width || best->height < fgp->height)
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best = fgp;
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}
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return best;
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}
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