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Data Structures | Macros | Enumerations | Functions | Variables
iff.c File Reference

IFF ACBM/ANIM/DEEP/ILBM/PBM/RGB8/RGBN bitmap decoder. More...

#include <stdint.h>
#include "libavutil/imgutils.h"
#include "libavutil/mem.h"
#include "bytestream.h"
#include "avcodec.h"
#include "codec_internal.h"
#include "decode.h"

Go to the source code of this file.

Data Structures

struct  IffContext
 

Macros

#define LUT8_PART(plane, v)
 
#define LUT8(plane)
 
#define LUT32(plane)
 
#define DECODE_HAM_PLANE32(x)
 
#define DECODE_RGBX_COMMON(type)
 
#define GETNIBBLE   ((i & 1) ? (src[i>>1] & 0xF) : (src[i>>1] >> 4))
 

Enumerations

enum  mask_type { MASK_NONE , MASK_HAS_MASK , MASK_HAS_TRANSPARENT_COLOR , MASK_LASSO }
 

Functions

static av_always_inline uint32_t gray2rgb (const uint32_t x)
 
static int cmap_read_palette (AVCodecContext *avctx, uint32_t *pal)
 Convert CMAP buffer (stored in extradata) to lavc palette format.
 
static int extract_header (AVCodecContext *const avctx, const uint8_t *const extradata, int extradata_size)
 Extracts the IFF extra context and updates internal decoder structures.
 
static av_cold int decode_end (AVCodecContext *avctx)
 
static av_cold int decode_init (AVCodecContext *avctx)
 
static void decodeplane8 (uint8_t *dst, const uint8_t *buf, int buf_size, int plane)
 Decode interleaved plane buffer up to 8bpp.
 
static void decodeplane32 (uint32_t *dst, const uint8_t *buf, int buf_size, int plane)
 Decode interleaved plane buffer up to 24bpp.
 
static void decode_ham_plane32 (uint32_t *dst, const uint8_t *buf, const uint32_t *const pal, unsigned buf_size)
 Converts one line of HAM6/8-encoded chunky buffer to 24bpp.
 
static void lookup_pal_indicies (uint32_t *dst, const uint32_t *buf, const uint32_t *const pal, unsigned width)
 
static int decode_byterun (uint8_t *dst, int dst_size, GetByteContext *gb)
 Decode one complete byterun1 encoded line.
 
static int decode_byterun2 (uint8_t *dst, int height, int line_size, GetByteContext *gb)
 
static void decode_rgb8 (GetByteContext *gb, uint8_t *dst, int width, int height, int linesize)
 Decode RGB8 buffer.
 
static void decode_rgbn (GetByteContext *gb, uint8_t *dst, int width, int height, int linesize)
 Decode RGBN buffer.
 
static void decode_deep_rle32 (uint8_t *dst, const uint8_t *src, int src_size, int width, int height, int linesize)
 Decode DEEP RLE 32-bit buffer.
 
static void decode_deep_tvdc32 (uint8_t *dst, const uint8_t *src, int src_size, int width, int height, int linesize, const int16_t *tvdc)
 Decode DEEP TVDC 32-bit buffer.
 
static void decode_short_horizontal_delta (uint8_t *dst, const uint8_t *buf, const uint8_t *buf_end, int w, int bpp, int dst_size)
 
static void decode_byte_vertical_delta (uint8_t *dst, const uint8_t *buf, const uint8_t *buf_end, int w, int xor, int bpp, int dst_size)
 
static void decode_delta_j (uint8_t *dst, const uint8_t *buf, const uint8_t *buf_end, int w, int h, int bpp, int dst_size)
 
static void decode_short_vertical_delta (uint8_t *dst, const uint8_t *buf, const uint8_t *buf_end, int w, int bpp, int dst_size)
 
static void decode_long_vertical_delta (uint8_t *dst, const uint8_t *buf, const uint8_t *buf_end, int w, int bpp, int dst_size)
 
static void decode_short_vertical_delta2 (uint8_t *dst, const uint8_t *buf, const uint8_t *buf_end, int w, int bpp, int dst_size)
 
static void decode_long_vertical_delta2 (uint8_t *dst, const uint8_t *buf, const uint8_t *buf_end, int w, int bpp, int dst_size)
 
static void decode_delta_d (uint8_t *dst, const uint8_t *buf, const uint8_t *buf_end, int w, int flag, int bpp, int dst_size)
 
static void decode_delta_e (uint8_t *dst, const uint8_t *buf, const uint8_t *buf_end, int w, int flag, int bpp, int dst_size)
 
static void decode_delta_l (uint8_t *dst, const uint8_t *buf, const uint8_t *buf_end, int w, int flag, int bpp, int dst_size)
 
static int unsupported (AVCodecContext *avctx)
 
static int parse_packet_header (AVCodecContext *const avctx, GetByteContext *gb)
 
static int decode_frame (AVCodecContext *avctx, AVFrame *frame, int *got_frame, AVPacket *avpkt)
 

Variables

static const uint64_t plane8_lut [8][256]
 
static const uint32_t plane32_lut [32][16 *4]
 
const FFCodec ff_iff_ilbm_decoder
 

Detailed Description

IFF ACBM/ANIM/DEEP/ILBM/PBM/RGB8/RGBN bitmap decoder.

Definition in file iff.c.

Macro Definition Documentation

◆ LUT8_PART

#define LUT8_PART ( plane,
v )
Value:
AV_LE2NE64C(UINT64_C(0x0000000)<<32 | v) << plane, \
AV_LE2NE64C(UINT64_C(0x1000000)<<32 | v) << plane, \
AV_LE2NE64C(UINT64_C(0x0010000)<<32 | v) << plane, \
AV_LE2NE64C(UINT64_C(0x1010000)<<32 | v) << plane, \
AV_LE2NE64C(UINT64_C(0x0000100)<<32 | v) << plane, \
AV_LE2NE64C(UINT64_C(0x1000100)<<32 | v) << plane, \
AV_LE2NE64C(UINT64_C(0x0010100)<<32 | v) << plane, \
AV_LE2NE64C(UINT64_C(0x1010100)<<32 | v) << plane, \
AV_LE2NE64C(UINT64_C(0x0000001)<<32 | v) << plane, \
AV_LE2NE64C(UINT64_C(0x1000001)<<32 | v) << plane, \
AV_LE2NE64C(UINT64_C(0x0010001)<<32 | v) << plane, \
AV_LE2NE64C(UINT64_C(0x1010001)<<32 | v) << plane, \
AV_LE2NE64C(UINT64_C(0x0000101)<<32 | v) << plane, \
AV_LE2NE64C(UINT64_C(0x1000101)<<32 | v) << plane, \
AV_LE2NE64C(UINT64_C(0x0010101)<<32 | v) << plane, \
AV_LE2NE64C(UINT64_C(0x1010101)<<32 | v) << plane
AV_LE2NE64C
#define AV_LE2NE64C(x)
Definition bswap.h:103

Definition at line 70 of file iff.c.

◆ LUT8

#define LUT8 ( plane)
Value:
{ \
LUT8_PART(plane, 0x0000000), \
LUT8_PART(plane, 0x1000000), \
LUT8_PART(plane, 0x0010000), \
LUT8_PART(plane, 0x1010000), \
LUT8_PART(plane, 0x0000100), \
LUT8_PART(plane, 0x1000100), \
LUT8_PART(plane, 0x0010100), \
LUT8_PART(plane, 0x1010100), \
LUT8_PART(plane, 0x0000001), \
LUT8_PART(plane, 0x1000001), \
LUT8_PART(plane, 0x0010001), \
LUT8_PART(plane, 0x1010001), \
LUT8_PART(plane, 0x0000101), \
LUT8_PART(plane, 0x1000101), \
LUT8_PART(plane, 0x0010101), \
LUT8_PART(plane, 0x1010101), \
}

Definition at line 88 of file iff.c.

◆ LUT32

#define LUT32 ( plane)
Value:
{ \
0, 0, 0, 0, \
0, 0, 0, 1U << plane, \
0, 0, 1U << plane, 0, \
0, 0, 1U << plane, 1U << plane, \
0, 1U << plane, 0, 0, \
0, 1U << plane, 0, 1U << plane, \
0, 1U << plane, 1U << plane, 0, \
0, 1U << plane, 1U << plane, 1U << plane, \
1U << plane, 0, 0, 0, \
1U << plane, 0, 0, 1U << plane, \
1U << plane, 0, 1U << plane, 0, \
1U << plane, 0, 1U << plane, 1U << plane, \
1U << plane, 1U << plane, 0, 0, \
1U << plane, 1U << plane, 0, 1U << plane, \
1U << plane, 1U << plane, 1U << plane, 0, \
1U << plane, 1U << plane, 1U << plane, 1U << plane, \
}

Definition at line 113 of file iff.c.

◆ DECODE_HAM_PLANE32

#define DECODE_HAM_PLANE32 ( x)
Value:
first = buf[x] << 1; \
second = buf[(x)+1] << 1; \
delta &= pal[first++]; \
delta |= pal[first]; \
dst[x] = delta; \
delta &= pal[second++]; \
delta |= pal[second]; \
dst[(x)+1] = delta
dst
uint8_t ptrdiff_t const uint8_t ptrdiff_t int intptr_t intptr_t int int16_t * dst
Definition dsp.h:87
delta
float delta
Definition vorbis_enc_data.h:430

Definition at line 445 of file iff.c.

Referenced by decode_ham_plane32().

◆ DECODE_RGBX_COMMON

#define DECODE_RGBX_COMMON ( type)
Value:
if (!length) { \
length = bytestream2_get_byte(gb); \
if (!length) { \
length = bytestream2_get_be16(gb); \
if (!length) \
return; \
} \
} \
for (i = 0; i < length; i++) { \
*(type *)(dst + y*linesize + x * sizeof(type)) = pixel; \
x += 1; \
if (x >= width) { \
y += 1; \
if (y >= height) \
return; \
x = 0; \
} \
}
pixel
#define pixel
Definition bit_depth_template.c:82
i
#define i(width, name, range_min, range_max)
Definition cbs_h264.c:63
type
cl_device_type type
Definition hwcontext_opencl.c:213
height
#define height
Definition dsp.h:89
width
#define width
Definition dsp.h:89

Definition at line 592 of file iff.c.

Referenced by decode_rgb8(), and decode_rgbn().

◆ GETNIBBLE

#define GETNIBBLE   ((i & 1) ? (src[i>>1] & 0xF) : (src[i>>1] >> 4))

Referenced by decode_deep_tvdc32().

Enumeration Type Documentation

◆ mask_type

enum mask_type
Enumerator
MASK_NONE 
MASK_HAS_MASK 
MASK_HAS_TRANSPARENT_COLOR 
MASK_LASSO 

Definition at line 40 of file iff.c.

Function Documentation

◆ gray2rgb()

static av_always_inline uint32_t gray2rgb ( const uint32_t x)
static

Definition at line 145 of file iff.c.

Referenced by cmap_read_palette(), and extract_header().

◆ cmap_read_palette()

static int cmap_read_palette ( AVCodecContext * avctx,
uint32_t * pal )
static

Convert CMAP buffer (stored in extradata) to lavc palette format.

Definition at line 152 of file iff.c.

Referenced by decode_frame().

◆ extract_header()

static int extract_header ( AVCodecContext *const avctx,
const uint8_t *const extradata,
int extradata_size )
static

Extracts the IFF extra context and updates internal decoder structures.

Parameters
avctxthe AVCodecContext where to extract extra context to
Returns
>= 0 in case of success, a negative error code otherwise

Definition at line 203 of file iff.c.

Referenced by decode_init().

◆ decode_end()

static av_cold int decode_end ( AVCodecContext * avctx)
static

Definition at line 324 of file iff.c.

◆ decode_init()

static av_cold int decode_init ( AVCodecContext * avctx)
static

Definition at line 338 of file iff.c.

◆ decodeplane8()

static void decodeplane8 ( uint8_t * dst,
const uint8_t * buf,
int buf_size,
int plane )
static

Decode interleaved plane buffer up to 8bpp.

Parameters
dstDestination buffer
bufSource buffer
buf_size
planeplane number to decode as

Definition at line 405 of file iff.c.

Referenced by decode_frame().

◆ decodeplane32()

static void decodeplane32 ( uint32_t * dst,
const uint8_t * buf,
int buf_size,
int plane )
static

Decode interleaved plane buffer up to 24bpp.

Parameters
dstDestination buffer
bufSource buffer
buf_size
planeplane number to decode as

Definition at line 427 of file iff.c.

Referenced by decode_frame().

◆ decode_ham_plane32()

static void decode_ham_plane32 ( uint32_t * dst,
const uint8_t * buf,
const uint32_t *const pal,
unsigned buf_size )
static

Converts one line of HAM6/8-encoded chunky buffer to 24bpp.

Parameters
dstthe destination 24bpp buffer
bufthe source 8bpp chunky buffer
palthe HAM decode table
buf_sizethe plane size in bytes

Definition at line 463 of file iff.c.

Referenced by decode_frame().

◆ lookup_pal_indicies()

static void lookup_pal_indicies ( uint32_t * dst,
const uint32_t * buf,
const uint32_t *const pal,
unsigned width )
static

Definition at line 478 of file iff.c.

Referenced by decode_frame().

◆ decode_byterun()

static int decode_byterun ( uint8_t * dst,
int dst_size,
GetByteContext * gb )
static

Decode one complete byterun1 encoded line.

Parameters
dstthe destination buffer where to store decompressed bitstream
dst_sizethe destination plane size in bytes
bufthe source byterun1 compressed bitstream
buf_endthe EOF of source byterun1 compressed bitstream
Returns
number of consumed bytes in byterun1 compressed bitstream

Definition at line 495 of file iff.c.

Referenced by decode_frame().

◆ decode_byterun2()

static int decode_byterun2 ( uint8_t * dst,
int height,
int line_size,
GetByteContext * gb )
static

Definition at line 522 of file iff.c.

Referenced by decode_frame().

◆ decode_rgb8()

static void decode_rgb8 ( GetByteContext * gb,
uint8_t * dst,
int width,
int height,
int linesize )
static

Decode RGB8 buffer.

Parameters
[out]dstDestination buffer
widthWidth of destination buffer (pixels)
heightHeight of destination buffer (pixels)
linesizeLine size of destination buffer (bytes)

Definition at line 619 of file iff.c.

Referenced by decode_frame().

◆ decode_rgbn()

static void decode_rgbn ( GetByteContext * gb,
uint8_t * dst,
int width,
int height,
int linesize )
static

Decode RGBN buffer.

Parameters
[out]dstDestination buffer
widthWidth of destination buffer (pixels)
heightHeight of destination buffer (pixels)
linesizeLine size of destination buffer (bytes)

Definition at line 636 of file iff.c.

Referenced by decode_frame().

◆ decode_deep_rle32()

static void decode_deep_rle32 ( uint8_t * dst,
const uint8_t * src,
int src_size,
int width,
int height,
int linesize )
static

Decode DEEP RLE 32-bit buffer.

Parameters
[out]dstDestination buffer
[in]srcSource buffer
src_sizeSource buffer size (bytes)
widthWidth of destination buffer (pixels)
heightHeight of destination buffer (pixels)
linesizeLine size of destination buffer (bytes)

Definition at line 656 of file iff.c.

Referenced by decode_frame().

◆ decode_deep_tvdc32()

static void decode_deep_tvdc32 ( uint8_t * dst,
const uint8_t * src,
int src_size,
int width,
int height,
int linesize,
const int16_t * tvdc )
static

Decode DEEP TVDC 32-bit buffer.

Parameters
[out]dstDestination buffer
[in]srcSource buffer
src_sizeSource buffer size (bytes)
widthWidth of destination buffer (pixels)
heightHeight of destination buffer (pixels)
linesizeLine size of destination buffer (bytes)
[int]tvdc TVDC lookup table

Definition at line 708 of file iff.c.

Referenced by decode_frame().

◆ decode_short_horizontal_delta()

static void decode_short_horizontal_delta ( uint8_t * dst,
const uint8_t * buf,
const uint8_t * buf_end,
int w,
int bpp,
int dst_size )
static

Definition at line 748 of file iff.c.

Referenced by decode_frame().

◆ decode_byte_vertical_delta()

static void decode_byte_vertical_delta ( uint8_t * dst,
const uint8_t * buf,
const uint8_t * buf_end,
int w,
int xor,
int bpp,
int dst_size )
static

Definition at line 801 of file iff.c.

Referenced by decode_frame().

◆ decode_delta_j()

static void decode_delta_j ( uint8_t * dst,
const uint8_t * buf,
const uint8_t * buf_end,
int w,
int h,
int bpp,
int dst_size )
static

Definition at line 868 of file iff.c.

Referenced by decode_frame().

◆ decode_short_vertical_delta()

static void decode_short_vertical_delta ( uint8_t * dst,
const uint8_t * buf,
const uint8_t * buf_end,
int w,
int bpp,
int dst_size )
static

Definition at line 979 of file iff.c.

Referenced by decode_frame().

◆ decode_long_vertical_delta()

static void decode_long_vertical_delta ( uint8_t * dst,
const uint8_t * buf,
const uint8_t * buf_end,
int w,
int bpp,
int dst_size )
static

Definition at line 1047 of file iff.c.

Referenced by decode_frame().

◆ decode_short_vertical_delta2()

static void decode_short_vertical_delta2 ( uint8_t * dst,
const uint8_t * buf,
const uint8_t * buf_end,
int w,
int bpp,
int dst_size )
static

Definition at line 1133 of file iff.c.

Referenced by decode_frame().

◆ decode_long_vertical_delta2()

static void decode_long_vertical_delta2 ( uint8_t * dst,
const uint8_t * buf,
const uint8_t * buf_end,
int w,
int bpp,
int dst_size )
static

Definition at line 1193 of file iff.c.

Referenced by decode_frame().

◆ decode_delta_d()

static void decode_delta_d ( uint8_t * dst,
const uint8_t * buf,
const uint8_t * buf_end,
int w,
int flag,
int bpp,
int dst_size )
static

Definition at line 1275 of file iff.c.

Referenced by decode_frame().

◆ decode_delta_e()

static void decode_delta_e ( uint8_t * dst,
const uint8_t * buf,
const uint8_t * buf_end,
int w,
int flag,
int bpp,
int dst_size )
static

Definition at line 1334 of file iff.c.

Referenced by decode_frame().

◆ decode_delta_l()

static void decode_delta_l ( uint8_t * dst,
const uint8_t * buf,
const uint8_t * buf_end,
int w,
int flag,
int bpp,
int dst_size )
static

Definition at line 1389 of file iff.c.

Referenced by decode_frame().

◆ unsupported()

static int unsupported ( AVCodecContext * avctx)
static

Definition at line 1461 of file iff.c.

Referenced by decode_frame(), and txd_decode_frame().

◆ parse_packet_header()

static int parse_packet_header ( AVCodecContext *const avctx,
GetByteContext * gb )
static

Definition at line 1468 of file iff.c.

Referenced by decode_frame().

◆ decode_frame()

static int decode_frame ( AVCodecContext * avctx,
AVFrame * frame,
int * got_frame,
AVPacket * avpkt )
static

Definition at line 1523 of file iff.c.

Variable Documentation

◆ plane8_lut

const uint64_t plane8_lut[8][256]
static
Initial value:
= {
LUT8(0), LUT8(1), LUT8(2), LUT8(3),
LUT8(4), LUT8(5), LUT8(6), LUT8(7),
}
LUT8
#define LUT8(plane)
Definition iff.c:88

Definition at line 108 of file iff.c.

Referenced by decodeplane8().

◆ plane32_lut

const uint32_t plane32_lut[32][16 *4]
static
Initial value:
= {
LUT32( 0), LUT32( 1), LUT32( 2), LUT32( 3),
LUT32( 4), LUT32( 5), LUT32( 6), LUT32( 7),
LUT32( 8), LUT32( 9), LUT32(10), LUT32(11),
LUT32(12), LUT32(13), LUT32(14), LUT32(15),
LUT32(16), LUT32(17), LUT32(18), LUT32(19),
LUT32(20), LUT32(21), LUT32(22), LUT32(23),
LUT32(24), LUT32(25), LUT32(26), LUT32(27),
LUT32(28), LUT32(29), LUT32(30), LUT32(31),
}
LUT32
#define LUT32(plane)
Definition iff.c:113

Definition at line 133 of file iff.c.

Referenced by decodeplane32().

◆ ff_iff_ilbm_decoder

const FFCodec ff_iff_ilbm_decoder
Initial value:
= {
.p.name = "iff",
CODEC_LONG_NAME("IFF ACBM/ANIM/DEEP/ILBM/PBM/RGB8/RGBN"),
.p.type = AVMEDIA_TYPE_VIDEO,
.p.id = AV_CODEC_ID_IFF_ILBM,
.priv_data_size = sizeof(IffContext),
.init = decode_init,
.close = decode_end,
FF_CODEC_DECODE_CB(decode_frame),
.p.capabilities = AV_CODEC_CAP_DR1,
.caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
}
close
static av_cold void close(AVCodecParserContext *s)
Definition apv_parser.c:197
FF_CODEC_DECODE_CB
#define FF_CODEC_DECODE_CB(func)
Definition codec_internal.h:374
CODEC_LONG_NAME
#define CODEC_LONG_NAME(str)
Definition codec_internal.h:359
FF_CODEC_CAP_INIT_CLEANUP
#define FF_CODEC_CAP_INIT_CLEANUP
The codec allows calling the close function for deallocation even if the init function returned a fai...
Definition codec_internal.h:43
init
int(* init)(AVBSFContext *ctx)
Definition dts2pts.c:608
AV_CODEC_CAP_DR1
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
Definition codec.h:49
AV_CODEC_ID_IFF_ILBM
@ AV_CODEC_ID_IFF_ILBM
Definition codec_id.h:186
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition avutil.h:200
decode_init
static av_cold int decode_init(AVCodecContext *avctx)
Definition 4xm.c:998
decode_end
static av_cold int decode_end(AVCodecContext *avctx)
Definition 4xm.c:980
decode_frame
static int decode_frame(AVCodecContext *avctx, AVFrame *picture, int *got_frame, AVPacket *avpkt)
Definition 4xm.c:837

Definition at line 1903 of file iff.c.

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