[FFmpeg-devel] [PATCH 1/2] avcodec/jpeg2000dec: Move decoder structs to header files
etemesicaleb at gmail.com
etemesicaleb at gmail.com
Thu Dec 15 20:59:59 EET 2022
From: caleb <etemesicaleb at gmail.com>
This should pave way for HTJ2K decoding
---
libavcodec/jpeg2000dec.c | 96 +----------------------------
libavcodec/jpeg2000dec.h | 126 +++++++++++++++++++++++++++++++++++++++
2 files changed, 127 insertions(+), 95 deletions(-)
create mode 100644 libavcodec/jpeg2000dec.h
diff --git a/libavcodec/jpeg2000dec.c b/libavcodec/jpeg2000dec.c
index c2b81ec103..7fc09cb558 100644
--- a/libavcodec/jpeg2000dec.c
+++ b/libavcodec/jpeg2000dec.c
@@ -42,101 +42,7 @@
#include "jpeg2000.h"
#include "jpeg2000dsp.h"
#include "profiles.h"
-
-#define JP2_SIG_TYPE 0x6A502020
-#define JP2_SIG_VALUE 0x0D0A870A
-#define JP2_CODESTREAM 0x6A703263
-#define JP2_HEADER 0x6A703268
-
-#define HAD_COC 0x01
-#define HAD_QCC 0x02
-
-#define MAX_POCS 32
-
-typedef struct Jpeg2000POCEntry {
- uint16_t LYEpoc;
- uint16_t CSpoc;
- uint16_t CEpoc;
- uint8_t RSpoc;
- uint8_t REpoc;
- uint8_t Ppoc;
-} Jpeg2000POCEntry;
-
-typedef struct Jpeg2000POC {
- Jpeg2000POCEntry poc[MAX_POCS];
- int nb_poc;
- int is_default;
-} Jpeg2000POC;
-
-typedef struct Jpeg2000TilePart {
- uint8_t tile_index; // Tile index who refers the tile-part
- const uint8_t *tp_end;
- GetByteContext header_tpg; // bit stream of header if PPM header is used
- GetByteContext tpg; // bit stream in tile-part
-} Jpeg2000TilePart;
-
-/* RMK: For JPEG2000 DCINEMA 3 tile-parts in a tile
- * one per component, so tile_part elements have a size of 3 */
-typedef struct Jpeg2000Tile {
- Jpeg2000Component *comp;
- uint8_t properties[4];
- Jpeg2000CodingStyle codsty[4];
- Jpeg2000QuantStyle qntsty[4];
- Jpeg2000POC poc;
- Jpeg2000TilePart tile_part[32];
- uint8_t has_ppt; // whether this tile has a ppt marker
- uint8_t *packed_headers; // contains packed headers. Used only along with PPT marker
- int packed_headers_size; // size in bytes of the packed headers
- GetByteContext packed_headers_stream; // byte context corresponding to packed headers
- uint16_t tp_idx; // Tile-part index
- int coord[2][2]; // border coordinates {{x0, x1}, {y0, y1}}
-} Jpeg2000Tile;
-
-typedef struct Jpeg2000DecoderContext {
- AVClass *class;
- AVCodecContext *avctx;
- GetByteContext g;
-
- int width, height;
- int image_offset_x, image_offset_y;
- int tile_offset_x, tile_offset_y;
- uint8_t cbps[4]; // bits per sample in particular components
- uint8_t sgnd[4]; // if a component is signed
- uint8_t properties[4];
-
- uint8_t has_ppm;
- uint8_t *packed_headers; // contains packed headers. Used only along with PPM marker
- int packed_headers_size;
- GetByteContext packed_headers_stream;
- uint8_t in_tile_headers;
-
- int cdx[4], cdy[4];
- int precision;
- int ncomponents;
- int colour_space;
- uint32_t palette[256];
- int8_t pal8;
- int cdef[4];
- int tile_width, tile_height;
- unsigned numXtiles, numYtiles;
- int maxtilelen;
- AVRational sar;
-
- Jpeg2000CodingStyle codsty[4];
- Jpeg2000QuantStyle qntsty[4];
- Jpeg2000POC poc;
- uint8_t roi_shift[4];
-
- int bit_index;
-
- int curtileno;
-
- Jpeg2000Tile *tile;
- Jpeg2000DSPContext dsp;
-
- /*options parameters*/
- int reduction_factor;
-} Jpeg2000DecoderContext;
+#include "jpeg2000dec.h"
/* get_bits functions for JPEG2000 packet bitstream
* It is a get_bit function with a bit-stuffing routine. If the value of the
diff --git a/libavcodec/jpeg2000dec.h b/libavcodec/jpeg2000dec.h
new file mode 100644
index 0000000000..b6410c1432
--- /dev/null
+++ b/libavcodec/jpeg2000dec.h
@@ -0,0 +1,126 @@
+/*
+ * JPEG 2000 image decoder
+ * Copyright (c) 2007 Kamil Nowosad
+ * Copyright (c) 2013 Nicolas Bertrand <nicoinattendu at gmail.com>
+ * Copyright (c) 2022 Caleb Etemesi <etemesicaleb at gmail.com>
+ *
+ * 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
+ */
+
+#ifndef AVCODEC_JPEG2000DEC_H
+#define AVCODEC_JPEG2000DEC_H
+
+#include "bytestream.h"
+#include "jpeg2000.h"
+#include "jpeg2000dsp.h"
+
+#define JP2_SIG_TYPE 0x6A502020
+#define JP2_SIG_VALUE 0x0D0A870A
+#define JP2_CODESTREAM 0x6A703263
+#define JP2_HEADER 0x6A703268
+
+#define HAD_COC 0x01
+#define HAD_QCC 0x02
+
+#define MAX_POCS 32
+
+typedef struct Jpeg2000POCEntry {
+ uint16_t LYEpoc;
+ uint16_t CSpoc;
+ uint16_t CEpoc;
+ uint8_t RSpoc;
+ uint8_t REpoc;
+ uint8_t Ppoc;
+} Jpeg2000POCEntry;
+
+typedef struct Jpeg2000POC {
+ Jpeg2000POCEntry poc[MAX_POCS];
+ int nb_poc;
+ int is_default;
+} Jpeg2000POC;
+
+typedef struct Jpeg2000TilePart {
+ uint8_t tile_index; // Tile index who refers the tile-part
+ const uint8_t *tp_end;
+ GetByteContext header_tpg; // bit stream of header if PPM header is used
+ GetByteContext tpg; // bit stream in tile-part
+} Jpeg2000TilePart;
+
+/* RMK: For JPEG2000 DCINEMA 3 tile-parts in a tile
+ * one per component, so tile_part elements have a size of 3 */
+typedef struct Jpeg2000Tile {
+ Jpeg2000Component *comp;
+ uint8_t properties[4];
+ Jpeg2000CodingStyle codsty[4];
+ Jpeg2000QuantStyle qntsty[4];
+ Jpeg2000POC poc;
+ Jpeg2000TilePart tile_part[32];
+ uint8_t has_ppt; // whether this tile has a ppt marker
+ uint8_t *packed_headers; // contains packed headers. Used only along with PPT marker
+ int packed_headers_size; // size in bytes of the packed headers
+ GetByteContext packed_headers_stream; // byte context corresponding to packed headers
+ uint16_t tp_idx; // Tile-part index
+ int coord[2][2]; // border coordinates {{x0, x1}, {y0, y1}}
+} Jpeg2000Tile;
+
+typedef struct Jpeg2000DecoderContext {
+ AVClass *class;
+ AVCodecContext *avctx;
+ GetByteContext g;
+
+ int width, height;
+ int image_offset_x, image_offset_y;
+ int tile_offset_x, tile_offset_y;
+ uint8_t cbps[4]; // bits per sample in particular components
+ uint8_t sgnd[4]; // if a component is signed
+ uint8_t properties[4];
+
+ uint8_t has_ppm;
+ uint8_t *packed_headers; // contains packed headers. Used only along with PPM marker
+ int packed_headers_size;
+ GetByteContext packed_headers_stream;
+ uint8_t in_tile_headers;
+
+ int cdx[4], cdy[4];
+ int precision;
+ int ncomponents;
+ int colour_space;
+ uint32_t palette[256];
+ int8_t pal8;
+ int cdef[4];
+ int tile_width, tile_height;
+ unsigned numXtiles, numYtiles;
+ int maxtilelen;
+ AVRational sar;
+
+ Jpeg2000CodingStyle codsty[4];
+ Jpeg2000QuantStyle qntsty[4];
+ Jpeg2000POC poc;
+ uint8_t roi_shift[4];
+
+ int bit_index;
+
+ int curtileno;
+
+ Jpeg2000Tile *tile;
+ Jpeg2000DSPContext dsp;
+
+ /*options parameters*/
+ int reduction_factor;
+} Jpeg2000DecoderContext;
+
+#endif //AVCODEC_JPEG2000DEC_H
--
2.37.2
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