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indeo4.c File Reference

Indeo Video Interactive version 4 decoder. More...

#include "avcodec.h"
#include "get_bits.h"
#include "indeo4data.h"
#include "internal.h"
#include "ivi.h"
#include "ivi_dsp.h"

Go to the source code of this file.

Macros

#define BITSTREAM_READER_LE
 
#define IVI4_PIC_SIZE_ESC   7
 

Functions

static int decode_plane_subdivision (GetBitContext *gb)
 Decode subdivision of a plane. More...
 
static int scale_tile_size (int def_size, int size_factor)
 
static int decode_pic_hdr (IVI45DecContext *ctx, AVCodecContext *avctx)
 Decode Indeo 4 picture header. More...
 
static int decode_band_hdr (IVI45DecContext *ctx, IVIBandDesc *band, AVCodecContext *avctx)
 Decode Indeo 4 band header. More...
 
static int decode_mb_info (IVI45DecContext *ctx, IVIBandDesc *band, IVITile *tile, AVCodecContext *avctx)
 Decode information (block type, cbp, quant delta, motion vector) for all macroblocks in the current tile. More...
 
static void switch_buffers (IVI45DecContext *ctx)
 Rearrange decoding and reference buffers. More...
 
static int is_nonnull_frame (IVI45DecContext *ctx)
 
static av_cold int decode_init (AVCodecContext *avctx)
 

Variables

struct {
   InvTransformPtr *   inv_trans
 
   DCTransformPtr *   dc_trans
 
   int   is_2d_trans
 
} transforms [18]
 
AVCodec ff_indeo4_decoder
 

Detailed Description

Indeo Video Interactive version 4 decoder.

Indeo 4 data is usually transported within .avi or .mov files. Known FOURCCs: 'IV41'

Definition in file indeo4.c.

Macro Definition Documentation

#define BITSTREAM_READER_LE

Definition at line 30 of file indeo4.c.

#define IVI4_PIC_SIZE_ESC   7

Definition at line 38 of file indeo4.c.

Referenced by decode_pic_hdr().

Function Documentation

static int decode_plane_subdivision ( GetBitContext *  gb)
static

Decode subdivision of a plane.

This is a simplified version that checks for two supported subdivisions:

  • 1 wavelet band per plane, size factor 1:1, code pattern: 3
  • 4 wavelet bands per plane, size factor 1:4, code pattern: 2,3,3,3,3 Anything else is either unsupported or corrupt.
Parameters
[in,out]gbthe GetBit context
Returns
number of wavelet bands or 0 on error

Definition at line 76 of file indeo4.c.

Referenced by decode_pic_hdr().

static int scale_tile_size ( int  def_size,
int  size_factor 
)
inlinestatic

Definition at line 93 of file indeo4.c.

Referenced by decode_pic_hdr().

static int decode_pic_hdr ( IVI45DecContext *  ctx,
AVCodecContext *  avctx 
)
static

Decode Indeo 4 picture header.

Parameters
[in,out]ctxpointer to the decoder context
[in]avctxpointer to the AVCodecContext
Returns
result code: 0 = OK, negative number = error

Definition at line 105 of file indeo4.c.

Referenced by decode_init().

static int decode_band_hdr ( IVI45DecContext *  ctx,
IVIBandDesc *  band,
AVCodecContext *  avctx 
)
static

Decode Indeo 4 band header.

Parameters
[in,out]ctxpointer to the decoder context
[in,out]bandpointer to the band descriptor
[in]avctxpointer to the AVCodecContext
Returns
result code: 0 = OK, negative number = error

Definition at line 263 of file indeo4.c.

Referenced by decode_init().

static int decode_mb_info ( IVI45DecContext *  ctx,
IVIBandDesc *  band,
IVITile *  tile,
AVCodecContext *  avctx 
)
static

Decode information (block type, cbp, quant delta, motion vector) for all macroblocks in the current tile.

Parameters
[in,out]ctxpointer to the decoder context
[in,out]bandpointer to the band descriptor
[in,out]tilepointer to the tile descriptor
[in]avctxpointer to the AVCodecContext
Returns
result code: 0 = OK, negative number = error

Definition at line 456 of file indeo4.c.

Referenced by decode_init().

static void switch_buffers ( IVI45DecContext *  ctx)
static

Rearrange decoding and reference buffers.

Parameters
[in,out]ctxpointer to the decoder context

Definition at line 617 of file indeo4.c.

Referenced by decode_init().

static int is_nonnull_frame ( IVI45DecContext *  ctx)
static

Definition at line 646 of file indeo4.c.

Referenced by decode_init().

static av_cold int decode_init ( AVCodecContext *  avctx)
static

Definition at line 652 of file indeo4.c.

Variable Documentation

InvTransformPtr* inv_trans

Definition at line 42 of file indeo4.c.

Referenced by decode_band_hdr().

DCTransformPtr* dc_trans

Definition at line 43 of file indeo4.c.

int is_2d_trans

Definition at line 44 of file indeo4.c.

const { ... } transforms[18]
Initial value:
= {
{ ff_ivi_inverse_haar_8x8, ff_ivi_dc_haar_2d, 1 },
{ ff_ivi_row_haar8, ff_ivi_dc_haar_2d, 0 },
{ ff_ivi_col_haar8, ff_ivi_dc_haar_2d, 0 },
{ ff_ivi_put_pixels_8x8, ff_ivi_put_dc_pixel_8x8, 1 },
{ ff_ivi_inverse_slant_8x8, ff_ivi_dc_slant_2d, 1 },
{ ff_ivi_row_slant8, ff_ivi_dc_row_slant, 1 },
{ ff_ivi_col_slant8, ff_ivi_dc_col_slant, 1 },
{ NULL, NULL, 0 },
{ NULL, NULL, 0 },
{ NULL, NULL, 0 },
{ ff_ivi_inverse_haar_4x4, ff_ivi_dc_haar_2d, 1 },
{ ff_ivi_inverse_slant_4x4, ff_ivi_dc_slant_2d, 1 },
{ NULL, NULL, 0 },
{ ff_ivi_row_haar4, ff_ivi_dc_haar_2d, 0 },
{ ff_ivi_col_haar4, ff_ivi_dc_haar_2d, 0 },
{ ff_ivi_row_slant4, ff_ivi_dc_row_slant, 0 },
{ ff_ivi_col_slant4, ff_ivi_dc_col_slant, 0 },
{ NULL, NULL, 0 },
}
NULL
#define NULL
Definition: coverity.c:32
ff_ivi_row_haar8
void ff_ivi_row_haar8(const int32_t *in, int16_t *out, ptrdiff_t pitch, const uint8_t *flags)
one-dimensional inverse 8-point Haar transform on rows for Indeo 4
Definition: ivi_dsp.c:325
ff_ivi_dc_col_slant
void ff_ivi_dc_col_slant(const int32_t *in, int16_t *out, ptrdiff_t pitch, int blk_size)
DC-only inverse column slant transform.
Definition: ivi_dsp.c:694
ff_ivi_col_haar8
void ff_ivi_col_haar8(const int32_t *in, int16_t *out, ptrdiff_t pitch, const uint8_t *flags)
one-dimensional inverse 8-point Haar transform on columns for Indeo 4
Definition: ivi_dsp.c:350
ff_ivi_row_slant8
void ff_ivi_row_slant8(const int32_t *in, int16_t *out, ptrdiff_t pitch, const uint8_t *flags)
inverse 1D row slant transform
Definition: ivi_dsp.c:629
ff_ivi_dc_slant_2d
void ff_ivi_dc_slant_2d(const int32_t *in, int16_t *out, ptrdiff_t pitch, int blk_size)
DC-only two-dimensional inverse slant transform.
Definition: ivi_dsp.c:616
ff_ivi_put_pixels_8x8
void ff_ivi_put_pixels_8x8(const int32_t *in, int16_t *out, ptrdiff_t pitch, const uint8_t *flags)
Copy the pixels into the frame buffer.
Definition: ivi_dsp.c:751
ff_ivi_inverse_haar_4x4
void ff_ivi_inverse_haar_4x4(const int32_t *in, int16_t *out, ptrdiff_t pitch, const uint8_t *flags)
two-dimensional inverse Haar 4x4 transform for Indeo 4
Definition: ivi_dsp.c:379
ff_ivi_col_slant4
void ff_ivi_col_slant4(const int32_t *in, int16_t *out, ptrdiff_t pitch, const uint8_t *flags)
inverse 1D column slant transform
Definition: ivi_dsp.c:728
ff_ivi_put_dc_pixel_8x8
void ff_ivi_put_dc_pixel_8x8(const int32_t *in, int16_t *out, ptrdiff_t pitch, int blk_size)
Copy the DC coefficient into the first pixel of the block and zero all others.
Definition: ivi_dsp.c:761
ff_ivi_inverse_haar_8x8
void ff_ivi_inverse_haar_8x8(const int32_t *in, int16_t *out, ptrdiff_t pitch, const uint8_t *flags)
two-dimensional inverse Haar 8x8 transform for Indeo 4
Definition: ivi_dsp.c:270
ff_ivi_dc_row_slant
void ff_ivi_dc_row_slant(const int32_t *in, int16_t *out, ptrdiff_t pitch, int blk_size)
DC-only inverse row slant transform.
Definition: ivi_dsp.c:649
ff_ivi_col_slant8
void ff_ivi_col_slant8(const int32_t *in, int16_t *out, ptrdiff_t pitch, const uint8_t *flags)
inverse 1D column slant transform
Definition: ivi_dsp.c:667
ff_ivi_dc_haar_2d
void ff_ivi_dc_haar_2d(const int32_t *in, int16_t *out, ptrdiff_t pitch, int blk_size)
DC-only two-dimensional inverse Haar transform for Indeo 4.
Definition: ivi_dsp.c:472
ff_ivi_row_haar4
void ff_ivi_row_haar4(const int32_t *in, int16_t *out, ptrdiff_t pitch, const uint8_t *flags)
one-dimensional inverse 4-point Haar transform on rows for Indeo 4
Definition: ivi_dsp.c:426
ff_ivi_col_haar4
void ff_ivi_col_haar4(const int32_t *in, int16_t *out, ptrdiff_t pitch, const uint8_t *flags)
one-dimensional inverse 4-point Haar transform on columns for Indeo 4
Definition: ivi_dsp.c:448
ff_ivi_inverse_slant_4x4
void ff_ivi_inverse_slant_4x4(const int32_t *in, int16_t *out, ptrdiff_t pitch, const uint8_t *flags)
two-dimensional inverse slant 4x4 transform
Definition: ivi_dsp.c:576
ff_ivi_inverse_slant_8x8
void ff_ivi_inverse_slant_8x8(const int32_t *in, int16_t *out, ptrdiff_t pitch, const uint8_t *flags)
two-dimensional inverse slant 8x8 transform
Definition: ivi_dsp.c:536
ff_ivi_row_slant4
void ff_ivi_row_slant4(const int32_t *in, int16_t *out, ptrdiff_t pitch, const uint8_t *flags)
inverse 1D row slant transform
Definition: ivi_dsp.c:708

Referenced by decode_band_hdr().

AVCodec ff_indeo4_decoder
Initial value:
= {
.name = "indeo4",
.long_name = NULL_IF_CONFIG_SMALL("Intel Indeo Video Interactive 4"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_INDEO4,
.priv_data_size = sizeof(IVI45DecContext),
.init = decode_init,
.close = ff_ivi_decode_close,
.decode = ff_ivi_decode_frame,
.capabilities = AV_CODEC_CAP_DR1,
}
init
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
ff_ivi_decode_close
av_cold int ff_ivi_decode_close(AVCodecContext *avctx)
Close Indeo5 decoder and clean up its context.
Definition: ivi.c:1200
ff_ivi_decode_frame
int ff_ivi_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: ivi.c:1054
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:179
decode_init
static av_cold int decode_init(AVCodecContext *avctx)
Definition: indeo4.c:652
AV_CODEC_ID_INDEO4
Definition: avcodec.h:331
decode
static int decode(AVCodecContext *avctx, AVFrame *frame, int *got_frame, AVPacket *pkt)
Definition: ffmpeg.c:2257
AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
AV_CODEC_CAP_DR1
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:994

Definition at line 688 of file indeo4.c.

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