mirror of https://github.com/FFmpeg/FFmpeg.git
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>pull/388/head
Andreas Rheinhardt
3 years ago
parent
1e38e7fd14
commit
8bf18018a3
9 changed files with 196 additions and 170 deletions
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/*
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* Common H.264/HEVC VUI Parameter decoding |
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* |
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* Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at> |
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* Copyright (C) 2012 - 2013 Guillaume Martres |
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* Copyright (C) 2012 - 2013 Mickael Raulet |
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* Copyright (C) 2012 - 2013 Gildas Cocherel |
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* Copyright (C) 2013 Vittorio Giovara |
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* |
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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 "libavutil/log.h" |
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#include "libavutil/pixdesc.h" |
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#include "get_bits.h" |
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#include "golomb.h" |
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#include "h2645data.h" |
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#include "h2645_vui.h" |
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#define EXTENDED_SAR 255 |
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void ff_h2645_decode_common_vui_params(GetBitContext *gb, H2645VUI *vui, void *logctx) |
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{ |
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int aspect_ratio_info_present_flag; |
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av_log(logctx, AV_LOG_DEBUG, "Decoding VUI\n"); |
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aspect_ratio_info_present_flag = get_bits1(gb); |
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if (aspect_ratio_info_present_flag) { |
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uint8_t aspect_ratio_idc = get_bits(gb, 8); |
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if (aspect_ratio_idc < FF_ARRAY_ELEMS(ff_h2645_pixel_aspect)) |
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vui->sar = ff_h2645_pixel_aspect[aspect_ratio_idc]; |
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else if (aspect_ratio_idc == EXTENDED_SAR) { |
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vui->sar.num = get_bits(gb, 16); |
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vui->sar.den = get_bits(gb, 16); |
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} else |
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av_log(logctx, AV_LOG_WARNING, |
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"Unknown SAR index: %u.\n", aspect_ratio_idc); |
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} else |
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vui->sar = (AVRational){ 0, 1 }; |
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vui->overscan_info_present_flag = get_bits1(gb); |
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if (vui->overscan_info_present_flag) |
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vui->overscan_appropriate_flag = get_bits1(gb); |
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vui->video_signal_type_present_flag = get_bits1(gb); |
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if (vui->video_signal_type_present_flag) { |
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vui->video_format = get_bits(gb, 3); |
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vui->video_full_range_flag = get_bits1(gb); |
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vui->colour_description_present_flag = get_bits1(gb); |
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if (vui->colour_description_present_flag) { |
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vui->colour_primaries = get_bits(gb, 8); |
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vui->transfer_characteristics = get_bits(gb, 8); |
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vui->matrix_coeffs = get_bits(gb, 8); |
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// Set invalid values to "unspecified"
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if (!av_color_primaries_name(vui->colour_primaries)) |
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vui->colour_primaries = AVCOL_PRI_UNSPECIFIED; |
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if (!av_color_transfer_name(vui->transfer_characteristics)) |
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vui->transfer_characteristics = AVCOL_TRC_UNSPECIFIED; |
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if (!av_color_space_name(vui->matrix_coeffs)) |
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vui->matrix_coeffs = AVCOL_SPC_UNSPECIFIED; |
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} |
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} |
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vui->chroma_loc_info_present_flag = get_bits1(gb); |
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if (vui->chroma_loc_info_present_flag) { |
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vui->chroma_sample_loc_type_top_field = get_ue_golomb_31(gb); |
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vui->chroma_sample_loc_type_bottom_field = get_ue_golomb_31(gb); |
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if (vui->chroma_sample_loc_type_top_field <= 5U) |
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vui->chroma_location = vui->chroma_sample_loc_type_top_field + 1; |
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else |
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vui->chroma_location = AVCHROMA_LOC_UNSPECIFIED; |
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} else |
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vui->chroma_location = AVCHROMA_LOC_LEFT; |
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} |
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@ -0,0 +1,49 @@ |
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/*
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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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#ifndef AVCODEC_H2645_VUI_H |
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#define AVCODEC_H2645_VUI_H |
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#include "libavutil/pixfmt.h" |
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#include "libavutil/rational.h" |
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#include "get_bits.h" |
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typedef struct H2645VUI { |
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AVRational sar; |
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int overscan_info_present_flag; |
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int overscan_appropriate_flag; |
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int video_signal_type_present_flag; |
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int video_format; |
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int video_full_range_flag; |
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int colour_description_present_flag; |
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enum AVColorPrimaries colour_primaries; |
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enum AVColorTransferCharacteristic transfer_characteristics; |
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enum AVColorSpace matrix_coeffs; |
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int chroma_loc_info_present_flag; |
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int chroma_sample_loc_type_top_field; |
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int chroma_sample_loc_type_bottom_field; |
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enum AVChromaLocation chroma_location; |
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} H2645VUI; |
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void ff_h2645_decode_common_vui_params(GetBitContext *gb, H2645VUI *vui, void *logctx); |
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#endif /* AVCODEC_H2645_VUI_H */ |
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