mpegaudioenc_template.c File Reference

The simplest mpeg audio layer 2 encoder. More...

#include "libavutil/channel_layout.h"
#include "avcodec.h"
#include "internal.h"
#include "put_bits.h"
#include "mpegaudio.h"
#include "mpegaudiodsp.h"
#include "mpegaudiodata.h"
#include "mpegaudiotab.h"

Go to the source code of this file.

Data Structures
struct	MpegAudioContext

Macros
#define	FRAC_BITS   15 /* fractional bits for sb_samples and dct */
#define	WFRAC_BITS   14 /* fractional bits for window */
#define	MUL(a, b)   (((int64_t)(a) * (int64_t)(b)) >> FRAC_BITS)
#define	SAMPLES_BUF_SIZE   4096
#define	P   15
#define	WSHIFT   (WFRAC_BITS + 15 - FRAC_BITS)
#define	SB_NOTALLOCATED   0
#define	SB_ALLOCATED   1
#define	SB_NOMORE   2

Functions
static av_cold int	MPA_encode_init (AVCodecContext *avctx)
static void	idct32 (int *out, int *tab)
static void	filter (MpegAudioContext *s, int ch, const short *samples, int incr)
static void	compute_scale_factors (MpegAudioContext *s, unsigned char scale_code[SBLIMIT], unsigned char scale_factors[SBLIMIT][3], int sb_samples[3][12][SBLIMIT], int sblimit)
static void	psycho_acoustic_model (MpegAudioContext *s, short smr[SBLIMIT])
static void	compute_bit_allocation (MpegAudioContext *s, short smr1[MPA_MAX_CHANNELS][SBLIMIT], unsigned char bit_alloc[MPA_MAX_CHANNELS][SBLIMIT], int *padding)
static void	encode_frame (MpegAudioContext *s, unsigned char bit_alloc[MPA_MAX_CHANNELS][SBLIMIT], int padding)
static int	MPA_encode_frame (AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr)

Variables
static const AVCodecDefault	mp2_defaults []

Detailed Description

The simplest mpeg audio layer 2 encoder.

Definition in file mpegaudioenc_template.c.

Macro Definition Documentation

#define FRAC_BITS   15 /* fractional bits for sb_samples and dct */

Definition at line 33 of file mpegaudioenc_template.c.

#define WFRAC_BITS   14 /* fractional bits for window */

Definition at line 34 of file mpegaudioenc_template.c.

Referenced by MPA_encode_init().

#define MUL	(		a,
			b
	)		(((int64_t)(a) * (int64_t)(b)) >> FRAC_BITS)

Definition at line 43 of file mpegaudioenc_template.c.

Referenced by idct32().

#define SAMPLES_BUF_SIZE   4096

Definition at line 45 of file mpegaudioenc_template.c.

Referenced by filter().

#define P   15

Referenced by direct_search(), encode_frame(), encode_q_branch(), estimate_motion_b(), ff_estimate_p_frame_motion(), ff_pre_estimate_p_frame_motion(), h263_mv4_search(), interlaced_search(), ipvideo_decode_block_opcode_0x7(), ipvideo_decode_block_opcode_0x7_16(), ipvideo_decode_block_opcode_0x8(), ipvideo_decode_block_opcode_0x8_16(), ipvideo_decode_block_opcode_0x9(), ipvideo_decode_block_opcode_0x9_16(), ipvideo_decode_block_opcode_0xA(), ipvideo_decode_block_opcode_0xA_16(), ipvideo_decode_block_opcode_0xD(), ipvideo_decode_block_opcode_0xD_16(), MPA_encode_init(), and query_formats().

#define WSHIFT   (WFRAC_BITS + 15 - FRAC_BITS)

Definition at line 316 of file mpegaudioenc_template.c.

Referenced by filter().

#define SB_NOTALLOCATED   0

Definition at line 497 of file mpegaudioenc_template.c.

Referenced by compute_bit_allocation().

#define SB_ALLOCATED   1

Definition at line 498 of file mpegaudioenc_template.c.

Referenced by compute_bit_allocation().

#define SB_NOMORE   2

Definition at line 499 of file mpegaudioenc_template.c.

Referenced by compute_bit_allocation().

Function Documentation

static av_cold int MPA_encode_init ( AVCodecContext *  avctx )

static

Definition at line 76 of file mpegaudioenc_template.c.

static void idct32 ( int *  out, int *  tab  )

static

Definition at line 197 of file mpegaudioenc_template.c.

Referenced by filter().

static void filter ( MpegAudioContext *  s, int  ch, const short *  samples, int  incr  )

static

Definition at line 318 of file mpegaudioenc_template.c.

Referenced by apply_ir_filter(), av_resample(), avfilter_graph_dump_to_buf(), avfilter_graph_parse2(), avfilter_graph_parse_ptr(), configure_output_video_filter(), ff_filter_alloc(), filter_3800(), filter_fast_3320(), initFilter(), libAVEnumPins_Cleanup(), libAVEnumPins_Clone(), libAVEnumPins_Setup(), libAVPin_Disconnect(), libAVPin_QueryPinInfo(), libAVPin_ReceiveConnection(), libAVPin_Setup(), main(), make_filters_from_proto(), MPA_encode_frame(), mpegts_open_pes_filter(), mpegts_open_section_filter(), predictor_update_3930(), predictor_update_filter(), ps_hybrid_analysis_c(), put_hevc_epel_h(), put_hevc_epel_v(), query_formats(), read_filter_params(), reap_filters(), resample_one(), set_filter(), show_filters(), swri_resample_TMPL(), sws_getDefaultFilter(), truespeech_apply_twopoint_filter(), tta_decode_frame(), tta_encode_frame(), xa_decode(), and yuv2yuvX_TMPL().

static void compute_scale_factors ( MpegAudioContext *  s, unsigned char  scale_code[SBLIMIT], unsigned char  scale_factors[SBLIMIT][3], int  sb_samples[3][12][SBLIMIT], int  sblimit  )

static

Definition at line 371 of file mpegaudioenc_template.c.

Referenced by MPA_encode_frame().

static void psycho_acoustic_model ( MpegAudioContext *  s, short  smr[SBLIMIT]  )

static

Definition at line 487 of file mpegaudioenc_template.c.

Referenced by MPA_encode_frame().

static void compute_bit_allocation ( MpegAudioContext *  s, short  smr1[MPA_MAX_CHANNELS][SBLIMIT], unsigned char  bit_alloc[MPA_MAX_CHANNELS][SBLIMIT], int *  padding  )

static

Definition at line 504 of file mpegaudioenc_template.c.

Referenced by MPA_encode_frame().

static void encode_frame ( MpegAudioContext *  s, unsigned char  bit_alloc[MPA_MAX_CHANNELS][SBLIMIT], int  padding  )

static

Definition at line 600 of file mpegaudioenc_template.c.

static int MPA_encode_frame ( AVCodecContext *  avctx, AVPacket *  avpkt, const AVFrame *  frame, int *  got_packet_ptr  )

static

Definition at line 738 of file mpegaudioenc_template.c.

Variable Documentation

const AVCodecDefault mp2_defaults[]

static

Initial value:

= {
    { "b",    "128k" },
    { NULL },
}

Definition at line 775 of file mpegaudioenc_template.c.