#include "libavutil/channel_layout.h"
#include "libavutil/ffmath.h"
#include "libavutil/float_dsp.h"
#include "avcodec.h"
#include "bytestream.h"
#include "fft.h"
#include "get_bits.h"
#include "internal.h"
#include "on2avcdata.h"

Data Structures
struct	On2AVCContext

Macros
#define	ON2AVC_SUBFRAME_SIZE 1024

#define	CMUL1_R(s, t, is, it) s[is + 0] * t[it + 0] - s[is + 1] * t[it + 1]

#define	CMUL1_I(s, t, is, it) s[is + 0] * t[it + 1] + s[is + 1] * t[it + 0]

#define	CMUL2_R(s, t, is, it) s[is + 0] * t[it + 0] + s[is + 1] * t[it + 1]

#define	CMUL2_I(s, t, is, it) s[is + 0] * t[it + 1] - s[is + 1] * t[it + 0]

#define	CMUL0(dst, id, s0, s1, s2, s3, t0, t1, t2, t3, is, it)

#define	CMUL1(dst, s0, s1, s2, s3, t0, t1, t2, t3, is, it)

#define	CMUL2(dst, s0, s1, s2, s3, t0, t1, t2, t3, is, it)

Enumerations
enum	WindowTypes { WINDOW_TYPE_LONG = 0, WINDOW_TYPE_LONG_STOP, WINDOW_TYPE_LONG_START, WINDOW_TYPE_8SHORT = 3, WINDOW_TYPE_EXT4, WINDOW_TYPE_EXT5, WINDOW_TYPE_EXT6, WINDOW_TYPE_EXT7 }

Functions
static void	on2avc_read_ms_info (On2AVCContext c, GetBitContext gb)

static int	on2avc_decode_band_types (On2AVCContext c, GetBitContext gb)

static int	on2avc_decode_band_scales (On2AVCContext c, GetBitContext gb)

static float	on2avc_scale (int v, float scale)

static int	on2avc_decode_quads (On2AVCContext c, GetBitContext gb, float *dst, int dst_size, int type, float band_scale)

static int	get_egolomb (GetBitContext *gb)

static int	on2avc_decode_pairs (On2AVCContext c, GetBitContext gb, float *dst, int dst_size, int type, float band_scale)

static int	on2avc_read_channel_data (On2AVCContext c, GetBitContext gb, int ch)

static int	on2avc_apply_ms (On2AVCContext *c)

static void	zero_head_and_tail (float *src, int len, int order0, int order1)

static void	pretwiddle (float src, float dst, int dst_len, int tab_step, int step, int order0, int order1, const double const tabs)

static void	twiddle (float src1, float src2, int src2_len, const double tab, int tab_len, int step, int order0, int order1, const double const *tabs)

static void	combine_fft (float s0, float s1, float s2, float s3, float dst, const float t0, const float t1, const float t2, const float *t3, int len, int step)

static void	wtf_end_512 (On2AVCContext c, float out, float src, float tmp0, float *tmp1)

static void	wtf_end_1024 (On2AVCContext c, float out, float src, float tmp0, float *tmp1)

static void	wtf_40 (On2AVCContext c, float out, float *src, int size)

static void	wtf_44 (On2AVCContext c, float out, float *src, int size)

static int	on2avc_reconstruct_channel_ext (On2AVCContext c, AVFrame dst, int offset)

static int	on2avc_reconstruct_channel (On2AVCContext c, int channel, AVFrame dst, int offset)

static int	on2avc_decode_subframe (On2AVCContext c, const uint8_t buf, int buf_size, AVFrame *dst, int offset)

static int	on2avc_decode_frame (AVCodecContext avctx, void data, int got_frame_ptr, AVPacket avpkt)

static av_cold void	on2avc_free_vlcs (On2AVCContext *c)

static av_cold int	on2avc_decode_init (AVCodecContext *avctx)

static av_cold int	on2avc_decode_close (AVCodecContext *avctx)

Variables
AVCodec	ff_on2avc_decoder

Macro Definition Documentation

◆ ON2AVC_SUBFRAME_SIZE

#define ON2AVC_SUBFRAME_SIZE 1024

Definition at line 34 of file on2avc.c.

Referenced by on2avc_decode_frame(), on2avc_read_channel_data(), and on2avc_reconstruct_channel().

◆ CMUL1_R

#define CMUL1_R	(	s,
		t,
		is,
		it
	)	s[is + 0] * t[it + 0] - s[is + 1] * t[it + 1]

Definition at line 378 of file on2avc.c.

◆ CMUL1_I

#define CMUL1_I	(	s,
		t,
		is,
		it
	)	s[is + 0] * t[it + 1] + s[is + 1] * t[it + 0]

Definition at line 380 of file on2avc.c.

◆ CMUL2_R

#define CMUL2_R	(	s,
		t,
		is,
		it
	)	s[is + 0] * t[it + 0] + s[is + 1] * t[it + 1]

Definition at line 382 of file on2avc.c.

◆ CMUL2_I

#define CMUL2_I	(	s,
		t,
		is,
		it
	)	s[is + 0] * t[it + 1] - s[is + 1] * t[it + 0]

Definition at line 384 of file on2avc.c.

◆ CMUL0

#define CMUL0	(	dst,
		id,
		s0,
		s1,
		s2,
		s3,
		t0,
		t1,
		t2,
		t3,
		is,
		it
	)

Value:

dst[id]     = s0[is] * t0[it]     + s1[is] * t1[it]                \
                + s2[is] * t2[it]     + s3[is] * t3[it];               \
    dst[id + 1] = s0[is] * t0[it + 1] + s1[is] * t1[it + 1]            \
                + s2[is] * t2[it + 1] + s3[is] * t3[it + 1];

Definition at line 387 of file on2avc.c.

Referenced by combine_fft().

◆ CMUL1

#define CMUL1	(	dst,
		s0,
		s1,
		s2,
		s3,
		t0,
		t1,
		t2,
		t3,
		is,
		it
	)

Value:

*dst++ = CMUL1_R(s0, t0, is, it)                                   \
           + CMUL1_R(s1, t1, is, it)                                   \
           + CMUL1_R(s2, t2, is, it)                                   \
           + CMUL1_R(s3, t3, is, it);                                  \
    *dst++ = CMUL1_I(s0, t0, is, it)                                   \
           + CMUL1_I(s1, t1, is, it)                                   \
           + CMUL1_I(s2, t2, is, it)                                   \
           + CMUL1_I(s3, t3, is, it);

Definition at line 393 of file on2avc.c.

Referenced by combine_fft().

◆ CMUL2

#define CMUL2	(	dst,
		s0,
		s1,
		s2,
		s3,
		t0,
		t1,
		t2,
		t3,
		is,
		it
	)

Value:

*dst++ = CMUL2_R(s0, t0, is, it)                                   \
           + CMUL2_R(s1, t1, is, it)                                   \
           + CMUL2_R(s2, t2, is, it)                                   \
           + CMUL2_R(s3, t3, is, it);                                  \
    *dst++ = CMUL2_I(s0, t0, is, it)                                   \
           + CMUL2_I(s1, t1, is, it)                                   \
           + CMUL2_I(s2, t2, is, it)                                   \
           + CMUL2_I(s3, t3, is, it);

Definition at line 403 of file on2avc.c.

Referenced by combine_fft().

Enumeration Type Documentation

◆ WindowTypes

enum WindowTypes

Enumerator
WINDOW_TYPE_LONG
WINDOW_TYPE_LONG_STOP
WINDOW_TYPE_LONG_START
WINDOW_TYPE_8SHORT
WINDOW_TYPE_EXT4
WINDOW_TYPE_EXT5
WINDOW_TYPE_EXT6
WINDOW_TYPE_EXT7

Definition at line 36 of file on2avc.c.

Function Documentation

◆ on2avc_read_ms_info()

static void on2avc_read_ms_info	(	On2AVCContext *	c,
		GetBitContext *	gb
	)

static

Definition at line 88 of file on2avc.c.

Referenced by on2avc_decode_subframe().

◆ on2avc_decode_band_types()

static int on2avc_decode_band_types	(	On2AVCContext *	c,
		GetBitContext *	gb
	)

static

Definition at line 109 of file on2avc.c.

Referenced by on2avc_read_channel_data().

◆ on2avc_decode_band_scales()

static int on2avc_decode_band_scales	(	On2AVCContext *	c,
		GetBitContext *	gb
	)

static

Definition at line 139 of file on2avc.c.

Referenced by on2avc_read_channel_data().

◆ on2avc_scale()

static float on2avc_scale	(	int	v,
		float	scale
	)

inlinestatic

Definition at line 186 of file on2avc.c.

Referenced by on2avc_decode_pairs(), and on2avc_decode_quads().

◆ on2avc_decode_quads()

static int on2avc_decode_quads	(	On2AVCContext *	c,
		GetBitContext *	gb,
		float *	dst,
		int	dst_size,
		int	type,
		float	band_scale
	)

static

Definition at line 192 of file on2avc.c.

Referenced by on2avc_read_channel_data().

◆ get_egolomb()

static int get_egolomb ( GetBitContext * gb )

inlinestatic

Definition at line 209 of file on2avc.c.

Referenced by on2avc_decode_pairs().

◆ on2avc_decode_pairs()

static int on2avc_decode_pairs	(	On2AVCContext *	c,
		GetBitContext *	gb,
		float *	dst,
		int	dst_size,
		int	type,
		float	band_scale
	)

static

Definition at line 225 of file on2avc.c.

Referenced by on2avc_read_channel_data().

◆ on2avc_read_channel_data()

static int on2avc_read_channel_data	(	On2AVCContext *	c,
		GetBitContext *	gb,
		int	ch
	)

static

Definition at line 253 of file on2avc.c.

Referenced by on2avc_decode_subframe().

◆ on2avc_apply_ms()

static int on2avc_apply_ms ( On2AVCContext * c )

static

Definition at line 290 of file on2avc.c.

Referenced by on2avc_decode_subframe().

◆ zero_head_and_tail()

static void zero_head_and_tail	(	float *	src,
		int	len,
		int	order0,
		int	order1
	)

static

Definition at line 315 of file on2avc.c.

Referenced by wtf_end_1024(), and wtf_end_512().

◆ pretwiddle()

static void pretwiddle	(	float *	src,
		float *	dst,
		int	dst_len,
		int	tab_step,
		int	step,
		int	order0,
		int	order1,
		const double const	tabs
	)

static

Definition at line 321 of file on2avc.c.

Referenced by twiddle(), wtf_end_1024(), and wtf_end_512().

◆ twiddle()

static void twiddle	(	float *	src1,
		float *	src2,
		int	src2_len,
		const double *	tab,
		int	tab_len,
		int	step,
		int	order0,
		int	order1,
		const double const	tabs
	)

static

Definition at line 348 of file on2avc.c.

Referenced by wtf_40(), and wtf_44().

◆ combine_fft()

static void combine_fft	(	float *	s0,
		float *	s1,
		float *	s2,
		float *	s3,
		float *	dst,
		const float *	t0,
		const float *	t1,
		const float *	t2,
		const float *	t3,
		int	len,
		int	step
	)

static

Definition at line 413 of file on2avc.c.

Referenced by wtf_end_1024(), and wtf_end_512().

◆ wtf_end_512()

static void wtf_end_512	(	On2AVCContext *	c,
		float *	out,
		float *	src,
		float *	tmp0,
		float *	tmp1
	)

static

Definition at line 462 of file on2avc.c.

Referenced by wtf_40(), and wtf_44().

◆ wtf_end_1024()

static void wtf_end_1024	(	On2AVCContext *	c,
		float *	out,
		float *	src,
		float *	tmp0,
		float *	tmp1
	)

static

Definition at line 495 of file on2avc.c.

Referenced by wtf_40(), and wtf_44().

◆ wtf_40()

static void wtf_40	(	On2AVCContext *	c,
		float *	out,
		float *	src,
		int	size
	)

static

Definition at line 528 of file on2avc.c.

Referenced by on2avc_decode_init().

◆ wtf_44()

static void wtf_44	(	On2AVCContext *	c,
		float *	out,
		float *	src,
		int	size
	)

static

Definition at line 614 of file on2avc.c.

Referenced by on2avc_decode_init().

◆ on2avc_reconstruct_channel_ext()

static int on2avc_reconstruct_channel_ext	(	On2AVCContext *	c,
		AVFrame *	dst,
		int	offset
	)

static

Definition at line 688 of file on2avc.c.

Referenced by on2avc_decode_subframe().

◆ on2avc_reconstruct_channel()

static int on2avc_reconstruct_channel	(	On2AVCContext *	c,
		int	channel,
		AVFrame *	dst,
		int	offset
	)

static

Definition at line 733 of file on2avc.c.

Referenced by on2avc_decode_subframe().

◆ on2avc_decode_subframe()

static int on2avc_decode_subframe	(	On2AVCContext *	c,
		const uint8_t *	buf,
		int	buf_size,
		AVFrame *	dst,
		int	offset
	)

static

Definition at line 798 of file on2avc.c.

Referenced by on2avc_decode_frame().

◆ on2avc_decode_frame()

static int on2avc_decode_frame	(	AVCodecContext *	avctx,
		void *	data,
		int *	got_frame_ptr,
		AVPacket *	avpkt
	)

static

Definition at line 839 of file on2avc.c.

◆ on2avc_free_vlcs()

static av_cold void on2avc_free_vlcs ( On2AVCContext * c )

static

Definition at line 897 of file on2avc.c.

Referenced by on2avc_decode_close(), and on2avc_decode_init().

◆ on2avc_decode_init()

static av_cold int on2avc_decode_init ( AVCodecContext * avctx )

static

Definition at line 906 of file on2avc.c.

◆ on2avc_decode_close()

static av_cold int on2avc_decode_close ( AVCodecContext * avctx )

static

Definition at line 991 of file on2avc.c.

Variable Documentation

◆ ff_on2avc_decoder

AVCodec ff_on2avc_decoder

Initial value:

= {
    .name           = "on2avc",
    .long_name      = NULL_IF_CONFIG_SMALL("On2 Audio for Video Codec"),
    .type           = AVMEDIA_TYPE_AUDIO,
    .id             = AV_CODEC_ID_ON2AVC,
    .priv_data_size = sizeof(On2AVCContext),
    .init           = on2avc_decode_init,
    .decode         = on2avc_decode_frame,
    .close          = on2avc_decode_close,
    .capabilities   = AV_CODEC_CAP_DR1,
    .sample_fmts    = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
                                                      AV_SAMPLE_FMT_NONE },
}

Definition at line 1011 of file on2avc.c.

Data Structures

Macros

Enumerations

Functions

Variables

Macro Definition Documentation

◆ ON2AVC_SUBFRAME_SIZE

◆ CMUL1_R

◆ CMUL1_I

◆ CMUL2_R

◆ CMUL2_I

◆ CMUL0

◆ CMUL1

◆ CMUL2

Enumeration Type Documentation

◆ WindowTypes

Function Documentation

◆ on2avc_read_ms_info()

◆ on2avc_decode_band_types()

◆ on2avc_decode_band_scales()

◆ on2avc_scale()

◆ on2avc_decode_quads()

◆ get_egolomb()

◆ on2avc_decode_pairs()

◆ on2avc_read_channel_data()

◆ on2avc_apply_ms()

◆ zero_head_and_tail()

◆ pretwiddle()

◆ twiddle()

◆ combine_fft()

◆ wtf_end_512()

◆ wtf_end_1024()

◆ wtf_40()

◆ wtf_44()

◆ on2avc_reconstruct_channel_ext()

◆ on2avc_reconstruct_channel()

◆ on2avc_decode_subframe()

◆ on2avc_decode_frame()

◆ on2avc_free_vlcs()

◆ on2avc_decode_init()

◆ on2avc_decode_close()

Variable Documentation

◆ ff_on2avc_decoder