libavcodec/indeo3.c File Reference

Intel Indeo 3 (IV31, IV32, etc. More...

#include "libavutil/imgutils.h"
#include "avcodec.h"
#include "dsputil.h"
#include "bytestream.h"
#include "indeo3data.h"

Go to the source code of this file.

Data Structures
struct	YUVBufs
struct	Indeo3DecodeContext
struct	ustr
Defines
#define	LV1_CHECK(buf1, rle_v3, lv1, lp2)
#define	RLE_V3_CHECK(buf1, rle_v1, rle_v2, rle_v3)
#define	LP2_CHECK(buf1, rle_v3, lp2)
#define	RLE_V2_CHECK(buf1, rle_v2, rle_v3, lp2)
Functions
static av_cold int	build_modpred (Indeo3DecodeContext *s)
static av_cold int	iv_alloc_frames (Indeo3DecodeContext *s)
static av_cold void	iv_free_func (Indeo3DecodeContext *s)
static void	iv_Decode_Chunk (Indeo3DecodeContext *s, uint8_t *cur, uint8_t *ref, int width, int height, const uint8_t *buf1, int cb_offset, const uint8_t *hdr, const uint8_t *buf2, int min_width_160)
static av_cold int	indeo3_decode_init (AVCodecContext *avctx)
static int	iv_decode_frame (AVCodecContext *avctx, const uint8_t *buf, int buf_size)
static int	indeo3_decode_frame (AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt)
static av_cold int	indeo3_decode_end (AVCodecContext *avctx)
Variables
static const uint8_t	corrector_type_0 [24]
static const uint8_t	corrector_type_2 [8] = { 9, 7, 6, 8, 5, 4, 3, 2 }
AVCodec	ff_indeo3_decoder

---

Detailed Description

Intel Indeo 3 (IV31, IV32, etc.

) video decoder for FFmpeg written, produced, and directed by Alan Smithee

For some documentation see: http://wiki.multimedia.cx/index.php?title=Indeo_3

Definition in file indeo3.c.

---

Define Documentation

#define LP2_CHECK	(	buf1,
		rle_v3,
		lp2		)

Value:

if(lp2 == 0 && rle_v3 != 0)     \
        rle_v3 = 0;                 \
    else {                          \
        buf1--;                     \
        rle_v3 = 1;                 \
    }

Definition at line 189 of file indeo3.c.

Referenced by iv_Decode_Chunk().

#define LV1_CHECK	(	buf1,
		rle_v3,
		lv1,
		lp2		)

Value:

if((lv1 & 0x80) != 0) {             \
        if(rle_v3 != 0)                 \
            rle_v3 = 0;                 \
        else {                          \
            rle_v3 = 1;                 \
            buf1 -= 2;                  \
        }                               \
    }                                   \
    lp2 = 4;

Definition at line 164 of file indeo3.c.

Referenced by iv_Decode_Chunk().

#define RLE_V2_CHECK	(	buf1,
		rle_v2,
		rle_v3,
		lp2		)

Value:

rle_v2--;                                 \
    if(rle_v2 == 0) {                         \
        rle_v3 = 0;                           \
        buf1 += 2;                            \
    }                                         \
    lp2 = 4;

Definition at line 198 of file indeo3.c.

Referenced by iv_Decode_Chunk().

#define RLE_V3_CHECK	(	buf1,
		rle_v1,
		rle_v2,
		rle_v3		)

Value:

if(rle_v3 == 0) {                            \
        rle_v2 = *buf1;                          \
        rle_v1 = 1;                              \
        if(rle_v2 > 32) {                        \
            rle_v2 -= 32;                        \
            rle_v1 = 0;                          \
        }                                        \
        rle_v3 = 1;                              \
    }                                            \
    buf1--;

Definition at line 176 of file indeo3.c.

Referenced by iv_Decode_Chunk().

---

Function Documentation

static av_cold int build_modpred

(

Indeo3DecodeContext *

s

)

[static]

Definition at line 66 of file indeo3.c.

Referenced by indeo3_decode_init().

static av_cold int indeo3_decode_end

(

AVCodecContext *

avctx

)

[static]

Definition at line 1137 of file indeo3.c.

static int indeo3_decode_frame	(	AVCodecContext *	avctx,
		void *	data,
		int *	data_size,
		AVPacket *	avpkt
	)			[static]

Definition at line 1082 of file indeo3.c.

static av_cold int indeo3_decode_init

(

AVCodecContext *

avctx

)

[static]

Definition at line 966 of file indeo3.c.

static av_cold int iv_alloc_frames

(

Indeo3DecodeContext *

s

)

[static]

Definition at line 100 of file indeo3.c.

Referenced by indeo3_decode_init(), and iv_decode_frame().

static void iv_Decode_Chunk	(	Indeo3DecodeContext *	s,
		uint8_t *	cur,
		uint8_t *	ref,
		int	width,
		int	height,
		const uint8_t *	buf1,
		int	cb_offset,
		const uint8_t *	hdr,
		const uint8_t *	buf2,
		int	min_width_160
	)			[static]

Definition at line 206 of file indeo3.c.

Referenced by iv_decode_frame().

static int iv_decode_frame	(	AVCodecContext *	avctx,
		const uint8_t *	buf,
		int	buf_size
	)			[static]

Definition at line 985 of file indeo3.c.

Referenced by indeo3_decode_frame().

static av_cold void iv_free_func

(

Indeo3DecodeContext *

s

)

[static]

Definition at line 146 of file indeo3.c.

Referenced by indeo3_decode_end(), and indeo3_decode_init().

---

Variable Documentation

const uint8_t corrector_type_0[24] [static]

Initial value:

 {
    195, 159, 133, 115, 101,  93,  87,  77,
    195, 159, 133, 115, 101,  93,  87,  77,
    128,  79,  79,  79,  79,  79,  79,  79
}

Definition at line 58 of file indeo3.c.

Referenced by build_modpred().

const uint8_t corrector_type_2[8] = { 9, 7, 6, 8, 5, 4, 3, 2 } [static]

Definition at line 64 of file indeo3.c.

Referenced by build_modpred().

AVCodec ff_indeo3_decoder

Initial value:

 {
    "indeo3",
    AVMEDIA_TYPE_VIDEO,
    CODEC_ID_INDEO3,
    sizeof(Indeo3DecodeContext),
    indeo3_decode_init,
    NULL,
    indeo3_decode_end,
    indeo3_decode_frame,
    CODEC_CAP_DR1,
    NULL,
    .long_name = NULL_IF_CONFIG_SMALL("Intel Indeo 3"),
}

Definition at line 1149 of file indeo3.c.