IFF PBM/ILBM bitmap decoder. More...

#include "libavutil/imgutils.h"
#include "bytestream.h"
#include "avcodec.h"
#include "internal.h"
#include "get_bits.h"

Data Structures
struct	IffContext

Macros
#define	LUT8_PART(plane, v)
#define	LUT8(plane)
#define	LUT32(plane)

Functions
static av_always_inline uint32_t	gray2rgb (const uint32_t x)
static int	ff_cmap_read_palette (AVCodecContext avctx, uint32_t pal)
	Convert CMAP buffer (stored in extradata) to lavc palette format.
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 int	decode_byterun (uint8_t dst, int dst_size, const uint8_t buf, const uint8_t *const buf_end)
	Decode one complete byterun1 encoded line.
static int	decode_frame_ilbm (AVCodecContext avctx, void data, int data_size, AVPacket avpkt)
static int	decode_frame_byterun1 (AVCodecContext avctx, void data, int data_size, AVPacket avpkt)
static av_cold int	decode_end (AVCodecContext *avctx)

Variables
static const uint64_t	plane8_lut [8][256]
static const uint32_t	plane32_lut [32][16 *4]
AVCodec	ff_iff_ilbm_decoder
AVCodec	ff_iff_byterun1_decoder

Detailed Description

IFF PBM/ILBM bitmap decoder.

Definition in file iff.c.

Macro Definition Documentation

#define LUT32 ( plane )

Value:

{                                \
             0,          0,          0,          0,   \
             0,          0,          0, 1 << plane,   \
             0,          0, 1 << plane,          0,   \
             0,          0, 1 << plane, 1 << plane,   \
             0, 1 << plane,          0,          0,   \
             0, 1 << plane,          0, 1 << plane,   \
             0, 1 << plane, 1 << plane,          0,   \
             0, 1 << plane, 1 << plane, 1 << plane,   \
    1 << plane,          0,          0,          0,   \
    1 << plane,          0,          0, 1 << plane,   \
    1 << plane,          0, 1 << plane,          0,   \
    1 << plane,          0, 1 << plane, 1 << plane,   \
    1 << plane, 1 << plane,          0,          0,   \
    1 << plane, 1 << plane,          0, 1 << plane,   \
    1 << plane, 1 << plane, 1 << plane,          0,   \
    1 << plane, 1 << plane, 1 << plane, 1 << plane,   \
}

Definition at line 84 of file iff.c.

#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 59 of file iff.c.

#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

Definition at line 41 of file iff.c.

Function Documentation

static int decode_byterun	(	uint8_t *	dst,
		int	dst_size,
		const uint8_t *	buf,
		const uint8_t *const	buf_end
	)

static

Decode one complete byterun1 encoded line.

Parameters

dst	the destination buffer where to store decompressed bitstream
dst_size	the destination plane size in bytes
buf	the source byterun1 compressed bitstream
buf_end	the EOF of source byterun1 compressed bitstream

Returns: number of consumed bytes in byterun1 compressed bitstream

Definition at line 227 of file iff.c.

Referenced by decode_frame_byterun1().

static av_cold int decode_end ( AVCodecContext * avctx )

static

Definition at line 362 of file iff.c.

static int decode_frame_byterun1	(	AVCodecContext *	avctx,
		void *	data,
		int *	data_size,
		AVPacket *	avpkt
	)

static

Definition at line 306 of file iff.c.

static int decode_frame_ilbm	(	AVCodecContext *	avctx,
		void *	data,
		int *	data_size,
		AVPacket *	avpkt
	)

static

Definition at line 249 of file iff.c.

static av_cold int decode_init ( AVCodecContext * avctx )

static

Definition at line 149 of file iff.c.

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

static

Decode interleaved plane buffer up to 24bpp.

Parameters

dst	Destination buffer
buf	Source buffer
buf_size
plane	plane number to decode as

Definition at line 200 of file iff.c.

Referenced by decode_frame_byterun1(), and decode_frame_ilbm().

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

static

Decode interleaved plane buffer up to 8bpp.

Parameters

dst	Destination buffer
buf	Source buffer
buf_size
plane	plane number to decode as

Definition at line 183 of file iff.c.

Referenced by decode_frame_byterun1(), and decode_frame_ilbm().

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

static

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

Definition at line 123 of file iff.c.

Referenced by decode_frame_byterun1(), and decode_frame_ilbm().

static av_always_inline uint32_t gray2rgb ( const uint32_t x )

static

Definition at line 116 of file iff.c.

Referenced by ff_cmap_read_palette().

Variable Documentation

AVCodec ff_iff_byterun1_decoder

Initial value:

 {
    .name           = "iff_byterun1",
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = CODEC_ID_IFF_BYTERUN1,
    .priv_data_size = sizeof(IffContext),
    .init           = decode_init,
    .close          = decode_end,
    .decode         = decode_frame_byterun1,
    .capabilities   = CODEC_CAP_DR1,
    .long_name = NULL_IF_CONFIG_SMALL("IFF ByteRun1"),
}

Definition at line 383 of file iff.c.

AVCodec ff_iff_ilbm_decoder

Initial value:

 {
    .name           = "iff_ilbm",
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = CODEC_ID_IFF_ILBM,
    .priv_data_size = sizeof(IffContext),
    .init           = decode_init,
    .close          = decode_end,
    .decode         = decode_frame_ilbm,
    .capabilities   = CODEC_CAP_DR1,
    .long_name = NULL_IF_CONFIG_SMALL("IFF ILBM"),
}

Definition at line 371 of file iff.c.

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),
}

Definition at line 104 of file iff.c.

Referenced by decodeplane32().

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),
}

Definition at line 79 of file iff.c.

Referenced by decodeplane8().

Data Structures

Macros

Functions

Variables

Detailed Description

Macro Definition Documentation

Function Documentation

Variable Documentation