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136 lines
4.0 KiB
C
136 lines
4.0 KiB
C
/*
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* Copyright (C) 2007 Marco Gerards <marco@gnu.org>
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* Copyright (C) 2009 David Conrad
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* Copyright (C) 2011 Jordi Ortiz
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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_DIRAC_H
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#define AVCODEC_DIRAC_H
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/**
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* @file
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* Interface to Dirac Decoder/Encoder
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* @author Marco Gerards <marco@gnu.org>
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* @author David Conrad
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* @author Jordi Ortiz
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*/
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#include <stddef.h>
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#include <stdint.h>
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#include "libavutil/pixfmt.h"
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#include "libavutil/rational.h"
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/**
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* The spec limits the number of wavelet decompositions to 4 for both
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* level 1 (VC-2) and 128 (long-gop default).
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* 5 decompositions is the maximum before >16-bit buffers are needed.
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* Schroedinger allows this for DD 9,7 and 13,7 wavelets only, limiting
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* the others to 4 decompositions (or 3 for the fidelity filter).
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*
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* We use this instead of MAX_DECOMPOSITIONS to save some memory.
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*/
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#define MAX_DWT_LEVELS 5
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/**
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* Parse code values:
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*
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* Dirac Specification ->
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* 9.6.1 Table 9.1
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*
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* VC-2 Specification ->
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* 10.4.1 Table 10.1
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*/
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enum DiracParseCodes {
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DIRAC_PCODE_SEQ_HEADER = 0x00,
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DIRAC_PCODE_END_SEQ = 0x10,
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DIRAC_PCODE_AUX = 0x20,
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DIRAC_PCODE_PAD = 0x30,
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DIRAC_PCODE_PICTURE_CODED = 0x08,
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DIRAC_PCODE_PICTURE_RAW = 0x48,
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DIRAC_PCODE_PICTURE_LOW_DEL = 0xC8,
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DIRAC_PCODE_PICTURE_HQ = 0xE8,
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DIRAC_PCODE_INTER_NOREF_CO1 = 0x0A,
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DIRAC_PCODE_INTER_NOREF_CO2 = 0x09,
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DIRAC_PCODE_INTER_REF_CO1 = 0x0D,
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DIRAC_PCODE_INTER_REF_CO2 = 0x0E,
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DIRAC_PCODE_INTRA_REF_CO = 0x0C,
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DIRAC_PCODE_INTRA_REF_RAW = 0x4C,
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DIRAC_PCODE_INTRA_REF_PICT = 0xCC,
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DIRAC_PCODE_MAGIC = 0x42424344,
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};
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typedef struct DiracVersionInfo {
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int major;
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int minor;
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} DiracVersionInfo;
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typedef struct AVDiracSeqHeader {
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unsigned width;
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unsigned height;
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uint8_t chroma_format; ///< 0: 444 1: 422 2: 420
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uint8_t interlaced;
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uint8_t top_field_first;
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uint8_t frame_rate_index; ///< index into dirac_frame_rate[]
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uint8_t aspect_ratio_index; ///< index into dirac_aspect_ratio[]
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uint16_t clean_width;
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uint16_t clean_height;
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uint16_t clean_left_offset;
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uint16_t clean_right_offset;
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uint8_t pixel_range_index; ///< index into dirac_pixel_range_presets[]
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uint8_t color_spec_index; ///< index into dirac_color_spec_presets[]
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int profile;
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int level;
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AVRational framerate;
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AVRational sample_aspect_ratio;
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enum AVPixelFormat pix_fmt;
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enum AVColorRange color_range;
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enum AVColorPrimaries color_primaries;
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enum AVColorTransferCharacteristic color_trc;
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enum AVColorSpace colorspace;
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DiracVersionInfo version;
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int bit_depth;
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} AVDiracSeqHeader;
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/**
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* Parse a Dirac sequence header.
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*
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* @param dsh this function will allocate and fill an AVDiracSeqHeader struct
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* and write it into this pointer. The caller must free it with
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* av_free().
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* @param buf the data buffer
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* @param buf_size the size of the data buffer in bytes
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* @param log_ctx if non-NULL, this function will log errors here
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* @return 0 on success, a negative AVERROR code on failure
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*/
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int av_dirac_parse_sequence_header(AVDiracSeqHeader **dsh,
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const uint8_t *buf, size_t buf_size,
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void *log_ctx);
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#endif /* AVCODEC_DIRAC_H */
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