FFmpeg
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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 [] |
The simplest mpeg audio layer 2 encoder.
Definition in file mpegaudioenc_template.c.
Definition at line 33 of file mpegaudioenc_template.c.
Definition at line 34 of file mpegaudioenc_template.c.
Referenced by MPA_encode_init().
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(), query_formats(), twofish_decrypt(), and twofish_encrypt().
#define WSHIFT (WFRAC_BITS + 15 - FRAC_BITS) |
Definition at line 321 of file mpegaudioenc_template.c.
Referenced by filter().
#define SB_NOTALLOCATED 0 |
Definition at line 502 of file mpegaudioenc_template.c.
Referenced by compute_bit_allocation().
#define SB_ALLOCATED 1 |
Definition at line 503 of file mpegaudioenc_template.c.
Referenced by compute_bit_allocation().
#define SB_NOMORE 2 |
Definition at line 504 of file mpegaudioenc_template.c.
Referenced by compute_bit_allocation().
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Definition at line 76 of file mpegaudioenc_template.c.
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Definition at line 202 of file mpegaudioenc_template.c.
Referenced by filter().
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Definition at line 323 of file mpegaudioenc_template.c.
Referenced by MPA_encode_frame().
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Definition at line 376 of file mpegaudioenc_template.c.
Referenced by MPA_encode_frame().
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Definition at line 492 of file mpegaudioenc_template.c.
Referenced by MPA_encode_frame().
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Definition at line 509 of file mpegaudioenc_template.c.
Referenced by MPA_encode_frame().
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Definition at line 605 of file mpegaudioenc_template.c.
Referenced by MPA_encode_frame().
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Definition at line 744 of file mpegaudioenc_template.c.
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Definition at line 781 of file mpegaudioenc_template.c.