Known FOURCCs: 'apch' (HQ), 'apcn' (SD), 'apcs' (LT), 'apco' (Proxy), 'ap4h' (4444), 'ap4x' (4444 XQ) More...

#include "config_components.h"
#include "libavutil/internal.h"
#include "libavutil/mem.h"
#include "libavutil/mem_internal.h"
#include "avcodec.h"
#include "codec_internal.h"
#include "decode.h"
#include "get_bits.h"
#include "hwaccel_internal.h"
#include "hwconfig.h"
#include "idctdsp.h"
#include "profiles.h"
#include "proresdec.h"
#include "proresdata.h"
#include "thread.h"

Macros
#define	ALPHA_SHIFT_16_TO_10(alpha_val)

#define	ALPHA_SHIFT_8_TO_10(alpha_val)

#define	ALPHA_SHIFT_16_TO_12(alpha_val)

#define	ALPHA_SHIFT_8_TO_12(alpha_val)

#define	HWACCEL_MAX (CONFIG_PRORES_VIDEOTOOLBOX_HWACCEL + CONFIG_PRORES_VULKAN_HWACCEL)

#define	DECODE_CODEWORD(val, codebook, SKIP)

#define	TOSIGNED(x)

#define	FIRST_DC_CB 0xB8

Functions
static void	unpack_alpha (GetBitContext gb, uint16_t dst, int num_coeffs, const int num_bits, const int decode_precision)

static void	unpack_alpha_10 (GetBitContext gb, uint16_t dst, int num_coeffs, const int num_bits)

static void	unpack_alpha_12 (GetBitContext gb, uint16_t dst, int num_coeffs, const int num_bits)

static av_cold int	decode_init (AVCodecContext *avctx)

static int	decode_frame_header (ProresContext ctx, const uint8_t buf, const int data_size, AVCodecContext *avctx)

static int	decode_picture_header (AVCodecContext avctx, const uint8_t buf, const int buf_size)

static av_always_inline int	decode_dc_coeffs (GetBitContext gb, int16_t out, int blocks_per_slice)

static av_always_inline int	decode_ac_coeffs (AVCodecContext avctx, GetBitContext gb, int16_t *out, int blocks_per_slice)

static int	decode_slice_luma (AVCodecContext avctx, SliceContext slice, uint16_t dst, int dst_stride, const uint8_t buf, unsigned buf_size, const int16_t *qmat)

static int	decode_slice_chroma (AVCodecContext avctx, SliceContext slice, uint16_t dst, int dst_stride, const uint8_t buf, unsigned buf_size, const int16_t *qmat, int log2_blocks_per_mb)

static void	decode_slice_alpha (const ProresContext ctx, uint16_t dst, int dst_stride, const uint8_t *buf, int buf_size, int blocks_per_slice)
	Decode alpha slice plane.

static int	decode_slice_thread (AVCodecContext avctx, void arg, int jobnr, int threadnr)

static int	decode_picture (AVCodecContext *avctx)

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

static av_cold int	decode_close (AVCodecContext *avctx)

Variables
static const uint8_t	dc_codebook [7] = { 0x04, 0x28, 0x28, 0x4D, 0x4D, 0x70, 0x70}

static const uint8_t	run_to_cb [16] = { 0x06, 0x06, 0x05, 0x05, 0x04, 0x29, 0x29, 0x29, 0x29, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x4C }

static const uint8_t	lev_to_cb [10] = { 0x04, 0x0A, 0x05, 0x06, 0x04, 0x28, 0x28, 0x28, 0x28, 0x4C }

const FFCodec	ff_prores_decoder

Detailed Description

Known FOURCCs: 'apch' (HQ), 'apcn' (SD), 'apcs' (LT), 'apco' (Proxy), 'ap4h' (4444), 'ap4x' (4444 XQ)

Definition in file proresdec.c.

Macro Definition Documentation

◆ ALPHA_SHIFT_16_TO_10

#define ALPHA_SHIFT_16_TO_10 ( alpha_val )

Value:

(alpha_val >> 6)

Definition at line 47 of file proresdec.c.

Referenced by unpack_alpha().

◆ ALPHA_SHIFT_8_TO_10

#define ALPHA_SHIFT_8_TO_10 ( alpha_val )

Value:

((alpha_val << 2) | (alpha_val >> 6))

Definition at line 48 of file proresdec.c.

Referenced by unpack_alpha().

◆ ALPHA_SHIFT_16_TO_12

#define ALPHA_SHIFT_16_TO_12 ( alpha_val )

Value:

(alpha_val >> 4)

Definition at line 49 of file proresdec.c.

Referenced by unpack_alpha().

◆ ALPHA_SHIFT_8_TO_12

#define ALPHA_SHIFT_8_TO_12 ( alpha_val )

Value:

((alpha_val << 4) | (alpha_val >> 4))

Definition at line 50 of file proresdec.c.

Referenced by unpack_alpha().

◆ HWACCEL_MAX

#define HWACCEL_MAX (CONFIG_PRORES_VIDEOTOOLBOX_HWACCEL + CONFIG_PRORES_VULKAN_HWACCEL)

◆ DECODE_CODEWORD

#define DECODE_CODEWORD	(	val,
		codebook,
		SKIP )

Value:

    do {                                                                \
        unsigned int rice_order, exp_order, switch_bits;                \
        unsigned int q, buf, bits;                                      \
                                                                        \
        UPDATE_CACHE_32(re, gb); /* We really need 32 bits */           \
        buf = GET_CACHE(re, gb);                                        \
                                                                        \
        /* number of bits to switch between rice and exp golomb */      \
        switch_bits =  codebook & 3;                                    \
        rice_order  =  codebook >> 5;                                   \
        exp_order   = (codebook >> 2) & 7;                              \
                                                                        \
        q = 31 - av_log2(buf);                                          \
                                                                        \
        if (q > switch_bits) { /* exp golomb */                         \
            bits = exp_order - switch_bits + (q<<1);                    \
            if (bits > 31)                                              \
                return AVERROR_INVALIDDATA;                             \
            val = SHOW_UBITS(re, gb, bits) - (1 << exp_order) +         \
                ((switch_bits + 1) << rice_order);                      \
            SKIP(re, gb, bits);                                         \
        } else if (rice_order) {                                        \
            SKIP_BITS(re, gb, q+1);                                     \
            val = (q << rice_order) + SHOW_UBITS(re, gb, rice_order);   \
            SKIP(re, gb, rice_order);                                   \
        } else {                                                        \
            val = q;                                                    \
            SKIP(re, gb, q+1);                                          \
        }                                                               \
    } while (0)

Definition at line 423 of file proresdec.c.

Referenced by decode_ac_coeffs(), and decode_dc_coeffs().

◆ TOSIGNED

#define TOSIGNED ( x )

Value:

(((x) >> 1) ^ (-((x) & 1)))

Definition at line 455 of file proresdec.c.

Referenced by decode_dc_coeffs().

◆ FIRST_DC_CB

#define FIRST_DC_CB 0xB8

Definition at line 457 of file proresdec.c.

Function Documentation

◆ unpack_alpha()

static void unpack_alpha	(	GetBitContext *	gb,
		uint16_t *	dst,
		int	num_coeffs,
		const int	num_bits,
		const int	decode_precision )

inlinestatic

Definition at line 52 of file proresdec.c.

Referenced by unpack_alpha_10(), and unpack_alpha_12().

◆ unpack_alpha_10()

static void unpack_alpha_10	(	GetBitContext *	gb,
		uint16_t *	dst,
		int	num_coeffs,
		const int	num_bits )

static

Definition at line 113 of file proresdec.c.

Referenced by decode_init().

◆ unpack_alpha_12()

static void unpack_alpha_12	(	GetBitContext *	gb,
		uint16_t *	dst,
		int	num_coeffs,
		const int	num_bits )

static

Definition at line 123 of file proresdec.c.

Referenced by decode_init().

◆ decode_init()

static av_cold int decode_init ( AVCodecContext * avctx )

static

Definition at line 133 of file proresdec.c.

◆ decode_frame_header()

static int decode_frame_header	(	ProresContext *	ctx,
		const uint8_t *	buf,
		const int	data_size,
		AVCodecContext *	avctx )

static

Definition at line 185 of file proresdec.c.

Referenced by decode_frame().

◆ decode_picture_header()

static int decode_picture_header	(	AVCodecContext *	avctx,
		const uint8_t *	buf,
		const int	buf_size )

static

Definition at line 315 of file proresdec.c.

Referenced by decode_frame().

◆ decode_dc_coeffs()

static av_always_inline int decode_dc_coeffs	(	GetBitContext *	gb,
		int16_t *	out,
		int	blocks_per_slice )

static

Definition at line 461 of file proresdec.c.

Referenced by decode_slice_chroma(), and decode_slice_luma().

◆ decode_ac_coeffs()

static av_always_inline int decode_ac_coeffs	(	AVCodecContext *	avctx,
		GetBitContext *	gb,
		int16_t *	out,
		int	blocks_per_slice )

static

Definition at line 492 of file proresdec.c.

Referenced by decode_slice_chroma(), and decode_slice_luma().

◆ decode_slice_luma()

static int decode_slice_luma	(	AVCodecContext *	avctx,
		SliceContext *	slice,
		uint16_t *	dst,
		int	dst_stride,
		const uint8_t *	buf,
		unsigned	buf_size,
		const int16_t *	qmat )

static

Definition at line 535 of file proresdec.c.

Referenced by decode_slice_thread().

◆ decode_slice_chroma()

static int decode_slice_chroma	(	AVCodecContext *	avctx,
		SliceContext *	slice,
		uint16_t *	dst,
		int	dst_stride,
		const uint8_t *	buf,
		unsigned	buf_size,
		const int16_t *	qmat,
		int	log2_blocks_per_mb )

static

Definition at line 569 of file proresdec.c.

Referenced by decode_slice_thread().

◆ decode_slice_alpha()

static void decode_slice_alpha	(	const ProresContext *	ctx,
		uint16_t *	dst,
		int	dst_stride,
		const uint8_t *	buf,
		int	buf_size,
		int	blocks_per_slice )

static

Decode alpha slice plane.

Definition at line 609 of file proresdec.c.

Referenced by decode_slice_thread().

◆ decode_slice_thread()

static int decode_slice_thread	(	AVCodecContext *	avctx,
		void *	arg,
		int	jobnr,
		int	threadnr )

static

Definition at line 639 of file proresdec.c.

◆ decode_picture()

static int decode_picture ( AVCodecContext * avctx )

static

Definition at line 742 of file proresdec.c.

Referenced by decode_frame().

◆ decode_frame()

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

static

Definition at line 761 of file proresdec.c.

◆ decode_close()

static av_cold int decode_close ( AVCodecContext * avctx )

static

Definition at line 844 of file proresdec.c.

Variable Documentation

◆ dc_codebook

const uint8_t dc_codebook[7] = { 0x04, 0x28, 0x28, 0x4D, 0x4D, 0x70, 0x70}

static

Definition at line 459 of file proresdec.c.

Referenced by decode_comp(), and decode_dc_coeffs().

◆ run_to_cb

const uint8_t run_to_cb[16] = { 0x06, 0x06, 0x05, 0x05, 0x04, 0x29, 0x29, 0x29, 0x29, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x4C }

static

Definition at line 489 of file proresdec.c.

Referenced by decode_ac_coeffs().

◆ lev_to_cb

const uint8_t lev_to_cb[10] = { 0x04, 0x0A, 0x05, 0x06, 0x04, 0x28, 0x28, 0x28, 0x28, 0x4C }

static

Definition at line 490 of file proresdec.c.

Referenced by decode_ac_coeffs().

◆ ff_prores_decoder

const FFCodec ff_prores_decoder

Initial value:

= {
    .p.name         = "prores",
    CODEC_LONG_NAME("Apple ProRes (iCodec Pro)"),
    .p.type         = AVMEDIA_TYPE_VIDEO,
    .p.id           = AV_CODEC_ID_PRORES,
    .priv_data_size = sizeof(ProresContext),
    .init           = decode_init,
    .close          = decode_close,
    FF_CODEC_DECODE_CB(decode_frame),
    UPDATE_THREAD_CONTEXT(update_thread_context),
    .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_SLICE_THREADS | AV_CODEC_CAP_FRAME_THREADS,
    .caps_internal  = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
    .p.profiles     = NULL_IF_CONFIG_SMALL(ff_prores_profiles),
 
}

Definition at line 867 of file proresdec.c.

Macros

Functions

Variables

Detailed Description

Macro Definition Documentation

◆ ALPHA_SHIFT_16_TO_10

◆ ALPHA_SHIFT_8_TO_10

◆ ALPHA_SHIFT_16_TO_12

◆ ALPHA_SHIFT_8_TO_12

◆ HWACCEL_MAX

◆ DECODE_CODEWORD

◆ TOSIGNED

◆ FIRST_DC_CB

Function Documentation

◆ unpack_alpha()

◆ unpack_alpha_10()

◆ unpack_alpha_12()

◆ decode_init()

◆ decode_frame_header()

◆ decode_picture_header()

◆ decode_dc_coeffs()

◆ decode_ac_coeffs()

◆ decode_slice_luma()

◆ decode_slice_chroma()

◆ decode_slice_alpha()

◆ decode_slice_thread()

◆ decode_picture()

◆ decode_frame()

◆ decode_close()

Variable Documentation

◆ dc_codebook

◆ run_to_cb

◆ lev_to_cb

◆ ff_prores_decoder