FFmpeg
Data Structures | Macros | Enumerations | Functions | Variables
flacenc.c File Reference
#include "libavutil/avassert.h"
#include "libavutil/crc.h"
#include "libavutil/intmath.h"
#include "libavutil/md5.h"
#include "libavutil/opt.h"
#include "avcodec.h"
#include "bswapdsp.h"
#include "put_bits.h"
#include "golomb.h"
#include "internal.h"
#include "lpc.h"
#include "flac.h"
#include "flacdata.h"
#include "flacdsp.h"

Go to the source code of this file.

Data Structures

struct  CompressionOptions
 
struct  RiceContext
 
struct  FlacSubframe
 
struct  FlacFrame
 
struct  FlacEncodeContext
 

Macros

#define FLAC_SUBFRAME_CONSTANT   0
 
#define FLAC_SUBFRAME_VERBATIM   1
 
#define FLAC_SUBFRAME_FIXED   8
 
#define FLAC_SUBFRAME_LPC   32
 
#define MAX_FIXED_ORDER   4
 
#define MAX_PARTITION_ORDER   8
 
#define MAX_PARTITIONS   (1 << MAX_PARTITION_ORDER)
 
#define MAX_LPC_PRECISION   15
 
#define MIN_LPC_SHIFT   0
 
#define MAX_LPC_SHIFT   15
 
#define COPY_SAMPLES(bits)
 
#define rice_encode_count(sum, n, k)   (((n)*((k)+1))+((sum-(n>>1))>>(k)))
 
#define FLAGS   AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_AUDIO_PARAM
 

Enumerations

enum  CodingMode { CODING_MODE_RICE = 4, CODING_MODE_RICE2 = 5 }
 

Functions

static void write_streaminfo (FlacEncodeContext *s, uint8_t *header)
 Write streaminfo metadata block to byte array. More...
 
static int select_blocksize (int samplerate, int block_time_ms)
 Set blocksize based on samplerate. More...
 
static av_cold void dprint_compression_options (FlacEncodeContext *s)
 
static av_cold int flac_encode_init (AVCodecContext *avctx)
 
static void init_frame (FlacEncodeContext *s, int nb_samples)
 
static void copy_samples (FlacEncodeContext *s, const void *samples)
 Copy channel-interleaved input samples into separate subframes. More...
 
static uint64_t rice_count_exact (const int32_t *res, int n, int k)
 
static uint64_t subframe_count_exact (FlacEncodeContext *s, FlacSubframe *sub, int pred_order)
 
static int find_optimal_param (uint64_t sum, int n, int max_param)
 Solve for d/dk(rice_encode_count) = n-((sum-(n>>1))>>(k+1)) = 0. More...
 
static int find_optimal_param_exact (uint64_t sums[32][MAX_PARTITIONS], int i, int max_param)
 
static uint64_t calc_optimal_rice_params (RiceContext *rc, int porder, uint64_t sums[32][MAX_PARTITIONS], int n, int pred_order, int max_param, int exact)
 
static void calc_sum_top (int pmax, int kmax, const uint32_t *data, int n, int pred_order, uint64_t sums[32][MAX_PARTITIONS])
 
static void calc_sum_next (int level, uint64_t sums[32][MAX_PARTITIONS], int kmax)
 
static uint64_t calc_rice_params (RiceContext *rc, uint32_t udata[FLAC_MAX_BLOCKSIZE], uint64_t sums[32][MAX_PARTITIONS], int pmin, int pmax, const int32_t *data, int n, int pred_order, int exact)
 
static int get_max_p_order (int max_porder, int n, int order)
 
static uint64_t find_subframe_rice_params (FlacEncodeContext *s, FlacSubframe *sub, int pred_order)
 
static void encode_residual_fixed (int32_t *res, const int32_t *smp, int n, int order)
 
static int encode_residual_ch (FlacEncodeContext *s, int ch)
 
static int count_frame_header (FlacEncodeContext *s)
 
static int encode_frame (FlacEncodeContext *s)
 
static void remove_wasted_bits (FlacEncodeContext *s)
 
static int estimate_stereo_mode (const int32_t *left_ch, const int32_t *right_ch, int n, int max_rice_param)
 
static void channel_decorrelation (FlacEncodeContext *s)
 Perform stereo channel decorrelation. More...
 
static void write_utf8 (PutBitContext *pb, uint32_t val)
 
static void write_frame_header (FlacEncodeContext *s)
 
static void write_subframes (FlacEncodeContext *s)
 
static void write_frame_footer (FlacEncodeContext *s)
 
static int write_frame (FlacEncodeContext *s, AVPacket *avpkt)
 
static int update_md5_sum (FlacEncodeContext *s, const void *samples)
 
static int flac_encode_frame (AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr)
 
static av_cold int flac_encode_close (AVCodecContext *avctx)
 

Variables

static const AVOption options []
 
static const AVClass flac_encoder_class
 
AVCodec ff_flac_encoder
 

Macro Definition Documentation

#define FLAC_SUBFRAME_CONSTANT   0

Definition at line 38 of file flacenc.c.

Referenced by encode_residual_ch(), subframe_count_exact(), and write_subframes().

#define FLAC_SUBFRAME_VERBATIM   1

Definition at line 39 of file flacenc.c.

Referenced by encode_residual_ch(), subframe_count_exact(), and write_subframes().

#define FLAC_SUBFRAME_FIXED   8

Definition at line 40 of file flacenc.c.

Referenced by encode_residual_ch().

#define FLAC_SUBFRAME_LPC   32
#define MAX_FIXED_ORDER   4

Definition at line 43 of file flacenc.c.

Referenced by encode_residual_ch(), and flac_encode_init().

#define MAX_PARTITION_ORDER   8

Definition at line 44 of file flacenc.c.

Referenced by calc_rice_params().

#define MAX_PARTITIONS   (1 << MAX_PARTITION_ORDER)

Definition at line 45 of file flacenc.c.

#define MAX_LPC_PRECISION   15

Definition at line 46 of file flacenc.c.

#define MIN_LPC_SHIFT   0

Definition at line 47 of file flacenc.c.

Referenced by encode_residual_ch().

#define MAX_LPC_SHIFT   15

Definition at line 48 of file flacenc.c.

Referenced by encode_residual_ch().

#define COPY_SAMPLES (   bits)
Value:
do { \
const int ## bits ## _t *samples0 = samples; \
frame = &s->frame; \
for (i = 0, j = 0; i < frame->blocksize; i++) \
for (ch = 0; ch < s->channels; ch++, j++) \
frame->subframes[ch].samples[i] = samples0[j] >> shift; \
} while (0)
static int shift(int a, int b)
Definition: sonic.c:82
uint8_t pi<< 24) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_U8,(uint64_t)((*(const uint8_t *) pi-0x80U))<< 56) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8,(*(const uint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8,(*(const uint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16,(*(const int16_t *) pi >>8)+0x80) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_S16,(uint64_t)(*(const int16_t *) pi)<< 48) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16,*(const int16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16,*(const int16_t *) pi *(1.0/(1<< 15))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32,(*(const int32_t *) pi >>24)+0x80) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_S32,(uint64_t)(*(const int32_t *) pi)<< 32) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32,*(const int32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32,*(const int32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S64,(*(const int64_t *) pi >>56)+0x80) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S64,*(const int64_t *) pi *(1.0f/(INT64_C(1)<< 63))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S64,*(const int64_t *) pi *(1.0/(INT64_C(1)<< 63))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, av_clip_uint8(lrintf(*(const float *) pi *(1<< 7))+0x80)) CONV_FUNC(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, av_clip_int16(lrintf(*(const float *) pi *(1<< 15)))) CONV_FUNC(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, av_clipl_int32(llrintf(*(const float *) pi *(1U<< 31)))) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_FLT, llrintf(*(const float *) pi *(INT64_C(1)<< 63))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, av_clip_uint8(lrint(*(const double *) pi *(1<< 7))+0x80)) CONV_FUNC(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, av_clip_int16(lrint(*(const double *) pi *(1<< 15)))) CONV_FUNC(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, av_clipl_int32(llrint(*(const double *) pi *(1U<< 31)))) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_DBL, llrint(*(const double *) pi *(INT64_C(1)<< 63)))#define FMT_PAIR_FUNC(out, in) static conv_func_type *const fmt_pair_to_conv_functions[AV_SAMPLE_FMT_NB *AV_SAMPLE_FMT_NB]={FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_S64),};static void cpy1(uint8_t **dst, const uint8_t **src, int len){memcpy(*dst,*src, len);}static void cpy2(uint8_t **dst, const uint8_t **src, int len){memcpy(*dst,*src, 2 *len);}static void cpy4(uint8_t **dst, const uint8_t **src, int len){memcpy(*dst,*src, 4 *len);}static void cpy8(uint8_t **dst, const uint8_t **src, int len){memcpy(*dst,*src, 8 *len);}AudioConvert *swri_audio_convert_alloc(enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, const int *ch_map, int flags){AudioConvert *ctx;conv_func_type *f=fmt_pair_to_conv_functions[av_get_packed_sample_fmt(out_fmt)+AV_SAMPLE_FMT_NB *av_get_packed_sample_fmt(in_fmt)];if(!f) return NULL;ctx=av_mallocz(sizeof(*ctx));if(!ctx) return NULL;if(channels==1){in_fmt=av_get_planar_sample_fmt(in_fmt);out_fmt=av_get_planar_sample_fmt(out_fmt);}ctx->channels=channels;ctx->conv_f=f;ctx->ch_map=ch_map;if(in_fmt==AV_SAMPLE_FMT_U8||in_fmt==AV_SAMPLE_FMT_U8P) memset(ctx->silence, 0x80, sizeof(ctx->silence));if(out_fmt==in_fmt &&!ch_map){switch(av_get_bytes_per_sample(in_fmt)){case 1:ctx->simd_f=cpy1;break;case 2:ctx->simd_f=cpy2;break;case 4:ctx->simd_f=cpy4;break;case 8:ctx->simd_f=cpy8;break;}}if(HAVE_X86ASM &&1) swri_audio_convert_init_x86(ctx, out_fmt, in_fmt, channels);if(ARCH_ARM) swri_audio_convert_init_arm(ctx, out_fmt, in_fmt, channels);if(ARCH_AARCH64) swri_audio_convert_init_aarch64(ctx, out_fmt, in_fmt, channels);return ctx;}void swri_audio_convert_free(AudioConvert **ctx){av_freep(ctx);}int swri_audio_convert(AudioConvert *ctx, AudioData *out, AudioData *in, int len){int ch;int off=0;const int os=(out->planar?1:out->ch_count)*out->bps;unsigned misaligned=0;av_assert0(ctx->channels==out->ch_count);if(ctx->in_simd_align_mask){int planes=in->planar?in->ch_count:1;unsigned m=0;for(ch=0;ch< planes;ch++) m|=(intptr_t) in->ch[ch];misaligned|=m &ctx->in_simd_align_mask;}if(ctx->out_simd_align_mask){int planes=out->planar?out->ch_count:1;unsigned m=0;for(ch=0;ch< planes;ch++) m|=(intptr_t) out->ch[ch];misaligned|=m &ctx->out_simd_align_mask;}if(ctx->simd_f &&!ctx->ch_map &&!misaligned){off=len &~15;av_assert1(off >=0);av_assert1(off<=len);av_assert2(ctx->channels==SWR_CH_MAX||!in->ch[ctx->channels]);if(off >0){if(out->planar==in->planar){int planes=out->planar?out->ch_count:1;for(ch=0;ch< planes;ch++){ctx->simd_f(out-> ch ch
Definition: audioconvert.c:56
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:259
uint8_t bits
Definition: vp3data.h:202
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
#define s(width, name)
Definition: cbs_vp9.c:257
Filter the word “frame” indicates either a video frame or a group of audio samples
for(j=16;j >0;--j)

Referenced by copy_samples().

#define rice_encode_count (   sum,
  n,
 
)    (((n)*((k)+1))+((sum-(n>>1))>>(k)))

Definition at line 601 of file flacenc.c.

Referenced by calc_optimal_rice_params(), and estimate_stereo_mode().

Definition at line 1463 of file flacenc.c.

Enumeration Type Documentation

enum CodingMode
Enumerator
CODING_MODE_RICE 
CODING_MODE_RICE2 

Definition at line 50 of file flacenc.c.

Function Documentation

static void write_streaminfo ( FlacEncodeContext s,
uint8_t header 
)
static

Write streaminfo metadata block to byte array.

Definition at line 135 of file flacenc.c.

Referenced by flac_encode_frame(), and flac_encode_init().

static int select_blocksize ( int  samplerate,
int  block_time_ms 
)
static

Set blocksize based on samplerate.

Choose the closest predefined blocksize >= BLOCK_TIME_MS milliseconds.

Definition at line 162 of file flacenc.c.

Referenced by flac_encode_init().

static av_cold void dprint_compression_options ( FlacEncodeContext s)
static

Definition at line 181 of file flacenc.c.

Referenced by flac_encode_init().

static av_cold int flac_encode_init ( AVCodecContext avctx)
static

Definition at line 239 of file flacenc.c.

static void init_frame ( FlacEncodeContext s,
int  nb_samples 
)
static

Definition at line 470 of file flacenc.c.

Referenced by decode_frame(), and flac_encode_frame().

static void copy_samples ( FlacEncodeContext s,
const void samples 
)
static

Copy channel-interleaved input samples into separate subframes.

Definition at line 515 of file flacenc.c.

Referenced by flac_encode_frame().

static uint64_t rice_count_exact ( const int32_t res,
int  n,
int  k 
)
static

Definition at line 537 of file flacenc.c.

Referenced by subframe_count_exact().

static uint64_t subframe_count_exact ( FlacEncodeContext s,
FlacSubframe sub,
int  pred_order 
)
static

Definition at line 551 of file flacenc.c.

Referenced by encode_residual_ch().

static int find_optimal_param ( uint64_t  sum,
int  n,
int  max_param 
)
static

Solve for d/dk(rice_encode_count) = n-((sum-(n>>1))>>(k+1)) = 0.

Definition at line 606 of file flacenc.c.

Referenced by calc_optimal_rice_params(), and estimate_stereo_mode().

static int find_optimal_param_exact ( uint64_t  sums[32][MAX_PARTITIONS],
int  i,
int  max_param 
)
static

Definition at line 618 of file flacenc.c.

Referenced by calc_optimal_rice_params().

static uint64_t calc_optimal_rice_params ( RiceContext rc,
int  porder,
uint64_t  sums[32][MAX_PARTITIONS],
int  n,
int  pred_order,
int  max_param,
int  exact 
)
static

Definition at line 635 of file flacenc.c.

Referenced by calc_rice_params().

static void calc_sum_top ( int  pmax,
int  kmax,
const uint32_t *  data,
int  n,
int  pred_order,
uint64_t  sums[32][MAX_PARTITIONS] 
)
static

Definition at line 665 of file flacenc.c.

Referenced by calc_rice_params().

static void calc_sum_next ( int  level,
uint64_t  sums[32][MAX_PARTITIONS],
int  kmax 
)
static

Definition at line 695 of file flacenc.c.

Referenced by calc_rice_params().

static uint64_t calc_rice_params ( RiceContext rc,
uint32_t  udata[FLAC_MAX_BLOCKSIZE],
uint64_t  sums[32][MAX_PARTITIONS],
int  pmin,
int  pmax,
const int32_t data,
int  n,
int  pred_order,
int  exact 
)
static

Definition at line 705 of file flacenc.c.

Referenced by find_subframe_rice_params().

static int get_max_p_order ( int  max_porder,
int  n,
int  order 
)
static

Definition at line 745 of file flacenc.c.

Referenced by find_subframe_rice_params().

static uint64_t find_subframe_rice_params ( FlacEncodeContext s,
FlacSubframe sub,
int  pred_order 
)
static

Definition at line 754 of file flacenc.c.

Referenced by encode_residual_ch().

static void encode_residual_fixed ( int32_t res,
const int32_t smp,
int  n,
int  order 
)
static

Definition at line 771 of file flacenc.c.

Referenced by encode_residual_ch().

static int encode_residual_ch ( FlacEncodeContext s,
int  ch 
)
static

Definition at line 822 of file flacenc.c.

Referenced by encode_frame().

static int count_frame_header ( FlacEncodeContext s)
static

Definition at line 1021 of file flacenc.c.

Referenced by encode_frame().

static int encode_frame ( FlacEncodeContext s)
static

Definition at line 1057 of file flacenc.c.

Referenced by flac_encode_frame().

static void remove_wasted_bits ( FlacEncodeContext s)
static

Definition at line 1077 of file flacenc.c.

Referenced by flac_encode_frame().

static int estimate_stereo_mode ( const int32_t left_ch,
const int32_t right_ch,
int  n,
int  max_rice_param 
)
static

Definition at line 1109 of file flacenc.c.

Referenced by channel_decorrelation().

static void channel_decorrelation ( FlacEncodeContext s)
static

Perform stereo channel decorrelation.

Definition at line 1153 of file flacenc.c.

Referenced by flac_encode_frame().

static void write_utf8 ( PutBitContext pb,
uint32_t  val 
)
static

Definition at line 1198 of file flacenc.c.

Referenced by write_frame_header().

static void write_frame_header ( FlacEncodeContext s)
static

Definition at line 1205 of file flacenc.c.

Referenced by write_frame().

static void write_subframes ( FlacEncodeContext s)
static

Definition at line 1242 of file flacenc.c.

Referenced by write_frame().

static void write_frame_footer ( FlacEncodeContext s)
static

Definition at line 1302 of file flacenc.c.

Referenced by write_frame().

static int write_frame ( FlacEncodeContext s,
AVPacket avpkt 
)
static

Definition at line 1313 of file flacenc.c.

Referenced by flac_encode_frame().

static int update_md5_sum ( FlacEncodeContext s,
const void samples 
)
static

Definition at line 1323 of file flacenc.c.

Referenced by flac_encode_frame().

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

Definition at line 1359 of file flacenc.c.

static av_cold int flac_encode_close ( AVCodecContext avctx)
static

Definition at line 1450 of file flacenc.c.

Variable Documentation

const AVOption options[]
static
Initial value:
= {
{ "lpc_coeff_precision", "LPC coefficient precision", 0x42, AV_OPT_TYPE_INT, {.i64 = 15 }, 0, MAX_LPC_PRECISION, FLAGS },
{ "lpc_type", "LPC algorithm", 0x42, AV_OPT_TYPE_INT, {.i64 = FF_LPC_TYPE_DEFAULT }, FF_LPC_TYPE_DEFAULT, FF_LPC_TYPE_NB-1, FLAGS, "lpc_type" },
{ "none", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = FF_LPC_TYPE_NONE }, INT_MIN, INT_MAX, FLAGS, "lpc_type" },
{ "fixed", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = FF_LPC_TYPE_FIXED }, INT_MIN, INT_MAX, FLAGS, "lpc_type" },
{ "levinson", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = FF_LPC_TYPE_LEVINSON }, INT_MIN, INT_MAX, FLAGS, "lpc_type" },
{ "cholesky", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = FF_LPC_TYPE_CHOLESKY }, INT_MIN, INT_MAX, FLAGS, "lpc_type" },
{ "lpc_passes", "Number of passes to use for Cholesky factorization during LPC analysis", 0x42, AV_OPT_TYPE_INT, {.i64 = 2 }, 1, INT_MAX, FLAGS },
{ "min_partition_order", NULL, 0x42, AV_OPT_TYPE_INT, {.i64 = -1 }, -1, MAX_PARTITION_ORDER, FLAGS },
{ "max_partition_order", NULL, 0x42, AV_OPT_TYPE_INT, {.i64 = -1 }, -1, MAX_PARTITION_ORDER, FLAGS },
{ "prediction_order_method", "Search method for selecting prediction order", 0x42, AV_OPT_TYPE_INT, {.i64 = -1 }, -1, ORDER_METHOD_LOG, FLAGS, "predm" },
{ "estimation", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = ORDER_METHOD_EST }, INT_MIN, INT_MAX, FLAGS, "predm" },
{ "2level", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = ORDER_METHOD_2LEVEL }, INT_MIN, INT_MAX, FLAGS, "predm" },
{ "4level", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = ORDER_METHOD_4LEVEL }, INT_MIN, INT_MAX, FLAGS, "predm" },
{ "8level", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = ORDER_METHOD_8LEVEL }, INT_MIN, INT_MAX, FLAGS, "predm" },
{ "search", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = ORDER_METHOD_SEARCH }, INT_MIN, INT_MAX, FLAGS, "predm" },
{ "log", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = ORDER_METHOD_LOG }, INT_MIN, INT_MAX, FLAGS, "predm" },
{ "ch_mode", "Stereo decorrelation mode", 0x42, AV_OPT_TYPE_INT, { .i64 = -1 }, -1, FLAC_CHMODE_MID_SIDE, FLAGS, "ch_mode" },
{ "auto", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = -1 }, INT_MIN, INT_MAX, FLAGS, "ch_mode" },
{ "indep", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FLAC_CHMODE_INDEPENDENT }, INT_MIN, INT_MAX, FLAGS, "ch_mode" },
{ "left_side", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FLAC_CHMODE_LEFT_SIDE }, INT_MIN, INT_MAX, FLAGS, "ch_mode" },
{ "right_side", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FLAC_CHMODE_RIGHT_SIDE }, INT_MIN, INT_MAX, FLAGS, "ch_mode" },
{ "mid_side", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FLAC_CHMODE_MID_SIDE }, INT_MIN, INT_MAX, FLAGS, "ch_mode" },
{ "exact_rice_parameters", "Calculate rice parameters exactly", 0x42, AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
{ "multi_dim_quant", "Multi-dimensional quantization", 0x42, AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
{ "min_prediction_order", NULL, 0x42, AV_OPT_TYPE_INT, { .i64 = -1 }, -1, MAX_LPC_ORDER, FLAGS },
{ "max_prediction_order", NULL, 0x42, AV_OPT_TYPE_INT, { .i64 = -1 }, -1, MAX_LPC_ORDER, FLAGS },
{ NULL },
}
#define NULL
Definition: coverity.c:32
#define ORDER_METHOD_SEARCH
Definition: lpc.h:34
#define ORDER_METHOD_8LEVEL
Definition: lpc.h:33
#define MAX_LPC_ORDER
Definition: lpc.h:38
#define MAX_PARTITION_ORDER
Definition: flacenc.c:44
#define ORDER_METHOD_LOG
Definition: lpc.h:35
do not use LPC prediction or use all zero coefficients
Definition: lpc.h:45
#define ORDER_METHOD_4LEVEL
Definition: lpc.h:32
#define ORDER_METHOD_2LEVEL
Definition: lpc.h:31
#define FLAGS
Definition: flacenc.c:1463
Not part of ABI.
Definition: lpc.h:49
Levinson-Durbin recursion.
Definition: lpc.h:47
#define ORDER_METHOD_EST
Definition: lpc.h:30
use the codec default LPC type
Definition: lpc.h:44
#define MAX_LPC_PRECISION
Definition: flacenc.c:46
Cholesky factorization.
Definition: lpc.h:48
fixed LPC coefficients
Definition: lpc.h:46

Definition at line 1464 of file flacenc.c.

const AVClass flac_encoder_class
static
Initial value:
= {
.class_name = "FLAC encoder",
.item_name = av_default_item_name,
.option = options,
}
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:191
static const AVOption options[]
Definition: flacenc.c:1464

Definition at line 1495 of file flacenc.c.

AVCodec ff_flac_encoder
Initial value:
= {
.name = "flac",
.long_name = NULL_IF_CONFIG_SMALL("FLAC (Free Lossless Audio Codec)"),
.priv_data_size = sizeof(FlacEncodeContext),
.encode2 = flac_encode_frame,
.priv_class = &flac_encoder_class,
}
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
static int flac_encode_frame(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr)
Definition: flacenc.c:1359
#define AV_CODEC_CAP_DELAY
Encoder or decoder requires flushing with NULL input at the end in order to give the complete and cor...
Definition: avcodec.h:1008
signed 32 bits
Definition: samplefmt.h:62
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
#define AV_CODEC_CAP_SMALL_LAST_FRAME
Codec can be fed a final frame with a smaller size.
Definition: avcodec.h:1013
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:58
signed 16 bits
Definition: samplefmt.h:61
#define AV_CODEC_CAP_LOSSLESS
Codec is lossless.
Definition: avcodec.h:1073
static av_cold int flac_encode_close(AVCodecContext *avctx)
Definition: flacenc.c:1450
static const AVClass flac_encoder_class
Definition: flacenc.c:1495
static enum AVSampleFormat sample_fmts[]
Definition: adpcmenc.c:701
static av_cold int flac_encode_init(AVCodecContext *avctx)
Definition: flacenc.c:239

Definition at line 1502 of file flacenc.c.