libastcdec.c File Reference

ASTC decoder using ARM's astc-encoder library (astcenc C API). More...

#include <astcenc/astcenc.h>
#include "avcodec.h"
#include "codec_internal.h"
#include "decode.h"
#include "profiles.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"

Go to the source code of this file.

Data Structures
struct	LibAstcDecContext

Macros
#define	ASTC_MAGIC   0x5CA1AB13
#define	ASTC_HEADER_SIZE   16
#define	ASTC_BLOCK_BYTES   16
#define	VD   AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
#define	OFFSET(x)

Functions
static av_cold int	astcdec_configure (AVCodecContext *avctx, enum astcenc_profile prf)
static av_cold int	libastcdec_init (AVCodecContext *avctx)
static int	libastcdec_decode (AVCodecContext *avctx, AVFrame *frame, int *got_frame, AVPacket *avpkt)
static av_cold int	libastcdec_close (AVCodecContext *avctx)

Variables
static const AVOption	dec_options []
static const AVClass	libastcenc_dec_class
const FFCodec	ff_libastcenc_decoder

Detailed Description

ASTC decoder using ARM's astc-encoder library (astcenc C API).

Consumes the raw ASTC bitstream; block size and dimensions are recovered from the 16-byte .astc-style extradata published by the demuxer.

Definition in file libastcdec.c.

Macro Definition Documentation

ASTC_MAGIC

#define ASTC_MAGIC   0x5CA1AB13

Definition at line 42 of file libastcdec.c.

Referenced by libastcdec_init(), and libastcenc_init().

ASTC_HEADER_SIZE

#define ASTC_HEADER_SIZE   16

Definition at line 43 of file libastcdec.c.

Referenced by astc_probe(), astc_read_header(), astc_write_header(), ktx_read_header(), ktx_write_header(), libastcdec_init(), and libastcenc_init().

ASTC_BLOCK_BYTES

#define ASTC_BLOCK_BYTES   16

Definition at line 44 of file libastcdec.c.

Referenced by astc_read_header(), libastcdec_decode(), and libastcenc_encode().

VD

#define VD   AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM

Definition at line 267 of file libastcdec.c.

OFFSET

#define OFFSET

(

x

)

Value:

offsetof(LibAstcDecContext, x)

Definition at line 268 of file libastcdec.c.

Function Documentation

astcdec_configure()

static av_cold int astcdec_configure ( AVCodecContext * avctx, enum astcenc_profile prf )

static

Definition at line 57 of file libastcdec.c.

Referenced by libastcdec_init().

libastcdec_init()

static av_cold int libastcdec_init ( AVCodecContext * avctx )

static

Definition at line 93 of file libastcdec.c.

libastcdec_decode()

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

static

Definition at line 174 of file libastcdec.c.

libastcdec_close()

static av_cold int libastcdec_close ( AVCodecContext * avctx )

static

Definition at line 257 of file libastcdec.c.

Variable Documentation

dec_options

const AVOption dec_options[]

static

Initial value:

= {
    { "dec_profile", "Decoder color profile (must match encoder)", OFFSET(dec_profile),
      AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 3, VD, .unit = "dec_profile" },
    { "ldr",       "Linear LDR",        0, AV_OPT_TYPE_CONST, { .i64 = ASTCENC_PRF_LDR },          0, 0, VD, .unit = "dec_profile" },
    { "ldr-srgb",  "sRGB LDR",          0, AV_OPT_TYPE_CONST, { .i64 = ASTCENC_PRF_LDR_SRGB },     0, 0, VD, .unit = "dec_profile" },
    { "hdr-ldr-a", "HDR RGB, LDR alpha", 0, AV_OPT_TYPE_CONST, { .i64 = ASTCENC_PRF_HDR_RGB_LDR_A }, 0, 0, VD, .unit = "dec_profile" },
    { "hdr",       "HDR",               0, AV_OPT_TYPE_CONST, { .i64 = ASTCENC_PRF_HDR },          0, 0, VD, .unit = "dec_profile" },
    { NULL },
}

Definition at line 270 of file libastcdec.c.

libastcenc_dec_class

const AVClass libastcenc_dec_class

static

Initial value:

= {
    .class_name = "libastcenc decoder",
    .item_name  = av_default_item_name,
    .option     = dec_options,
    .version    = LIBAVUTIL_VERSION_INT,
}

Definition at line 280 of file libastcdec.c.

ff_libastcenc_decoder

const FFCodec ff_libastcenc_decoder

Initial value:

= {
    .p.name         = "libastcenc",
    CODEC_LONG_NAME("ASTC (Adaptive Scalable Texture Compression) image using astc-encoder"),
    .p.type         = AVMEDIA_TYPE_VIDEO,
    .p.id           = AV_CODEC_ID_ASTC,
    .p.capabilities = AV_CODEC_CAP_DR1,
    CODEC_PIXFMTS(AV_PIX_FMT_RGBA, AV_PIX_FMT_RGBAF16),
    .p.profiles     = NULL_IF_CONFIG_SMALL(ff_astc_profiles),
    .p.priv_class   = &libastcenc_dec_class,
    .p.wrapper_name = "libastcenc",
    .caps_internal  = FF_CODEC_CAP_NOT_INIT_THREADSAFE |
                      FF_CODEC_CAP_INIT_CLEANUP,
    .priv_data_size = sizeof(LibAstcDecContext),
    .init           = libastcdec_init,
    FF_CODEC_DECODE_CB(libastcdec_decode),
    .close          = libastcdec_close,
}

Definition at line 287 of file libastcdec.c.