FFmpeg  4.0
Data Structures | Macros | Functions | Variables
alacenc.c File Reference
#include "libavutil/opt.h"
#include "avcodec.h"
#include "put_bits.h"
#include "internal.h"
#include "lpc.h"
#include "mathops.h"
#include "alac_data.h"

Go to the source code of this file.

Data Structures

struct  RiceContext
 
struct  AlacLPCContext
 
struct  AlacEncodeContext
 

Macros

#define DEFAULT_FRAME_SIZE   4096
 
#define ALAC_EXTRADATA_SIZE   36
 
#define ALAC_FRAME_HEADER_SIZE   55
 
#define ALAC_FRAME_FOOTER_SIZE   3
 
#define ALAC_ESCAPE_CODE   0x1FF
 
#define ALAC_MAX_LPC_ORDER   30
 
#define DEFAULT_MAX_PRED_ORDER   6
 
#define DEFAULT_MIN_PRED_ORDER   4
 
#define ALAC_MAX_LPC_PRECISION   9
 
#define ALAC_MIN_LPC_SHIFT   0
 
#define ALAC_MAX_LPC_SHIFT   9
 
#define ALAC_CHMODE_LEFT_RIGHT   0
 
#define ALAC_CHMODE_LEFT_SIDE   1
 
#define ALAC_CHMODE_RIGHT_SIDE   2
 
#define ALAC_CHMODE_MID_SIDE   3
 
#define COPY_SAMPLES(type)
 
#define OFFSET(x)   offsetof(AlacEncodeContext, x)
 
#define AE   AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
 

Functions

static void init_sample_buffers (AlacEncodeContext *s, int channels, const uint8_t *samples[2])
 
static void encode_scalar (AlacEncodeContext *s, int x, int k, int write_sample_size)
 
static void write_element_header (AlacEncodeContext *s, enum AlacRawDataBlockType element, int instance)
 
static void calc_predictor_params (AlacEncodeContext *s, int ch)
 
static int estimate_stereo_mode (int32_t *left_ch, int32_t *right_ch, int n)
 
static void alac_stereo_decorrelation (AlacEncodeContext *s)
 
static void alac_linear_predictor (AlacEncodeContext *s, int ch)
 
static void alac_entropy_coder (AlacEncodeContext *s, int ch)
 
static void write_element (AlacEncodeContext *s, enum AlacRawDataBlockType element, int instance, const uint8_t *samples0, const uint8_t *samples1)
 
static int write_frame (AlacEncodeContext *s, AVPacket *avpkt, uint8_t *const *samples)
 
static av_always_inline int get_max_frame_size (int frame_size, int ch, int bps)
 
static av_cold int alac_encode_close (AVCodecContext *avctx)
 
static av_cold int alac_encode_init (AVCodecContext *avctx)
 
static int alac_encode_frame (AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr)
 

Variables

static const AVOption options []
 
static const AVClass alacenc_class
 
AVCodec ff_alac_encoder
 

Macro Definition Documentation

◆ DEFAULT_FRAME_SIZE

#define DEFAULT_FRAME_SIZE   4096

Definition at line 31 of file alacenc.c.

Referenced by alac_encode_frame(), alac_encode_init(), get_max_frame_size(), and write_element_header().

◆ ALAC_EXTRADATA_SIZE

#define ALAC_EXTRADATA_SIZE   36

Definition at line 32 of file alacenc.c.

Referenced by alac_encode_init().

◆ ALAC_FRAME_HEADER_SIZE

#define ALAC_FRAME_HEADER_SIZE   55

Definition at line 33 of file alacenc.c.

◆ ALAC_FRAME_FOOTER_SIZE

#define ALAC_FRAME_FOOTER_SIZE   3

Definition at line 34 of file alacenc.c.

◆ ALAC_ESCAPE_CODE

#define ALAC_ESCAPE_CODE   0x1FF

Definition at line 36 of file alacenc.c.

Referenced by encode_scalar().

◆ ALAC_MAX_LPC_ORDER

#define ALAC_MAX_LPC_ORDER   30

Definition at line 37 of file alacenc.c.

Referenced by alac_encode_init().

◆ DEFAULT_MAX_PRED_ORDER

#define DEFAULT_MAX_PRED_ORDER   6

Definition at line 38 of file alacenc.c.

◆ DEFAULT_MIN_PRED_ORDER

#define DEFAULT_MIN_PRED_ORDER   4

Definition at line 39 of file alacenc.c.

◆ ALAC_MAX_LPC_PRECISION

#define ALAC_MAX_LPC_PRECISION   9

Definition at line 40 of file alacenc.c.

Referenced by calc_predictor_params().

◆ ALAC_MIN_LPC_SHIFT

#define ALAC_MIN_LPC_SHIFT   0

Definition at line 41 of file alacenc.c.

Referenced by calc_predictor_params().

◆ ALAC_MAX_LPC_SHIFT

#define ALAC_MAX_LPC_SHIFT   9

Definition at line 42 of file alacenc.c.

Referenced by calc_predictor_params().

◆ ALAC_CHMODE_LEFT_RIGHT

#define ALAC_CHMODE_LEFT_RIGHT   0

Definition at line 44 of file alacenc.c.

Referenced by alac_stereo_decorrelation().

◆ ALAC_CHMODE_LEFT_SIDE

#define ALAC_CHMODE_LEFT_SIDE   1

Definition at line 45 of file alacenc.c.

Referenced by alac_stereo_decorrelation().

◆ ALAC_CHMODE_RIGHT_SIDE

#define ALAC_CHMODE_RIGHT_SIDE   2

Definition at line 46 of file alacenc.c.

Referenced by alac_stereo_decorrelation().

◆ ALAC_CHMODE_MID_SIDE

#define ALAC_CHMODE_MID_SIDE   3

Definition at line 47 of file alacenc.c.

◆ COPY_SAMPLES

#define COPY_SAMPLES (   type)
Value:
do { \
for (ch = 0; ch < channels; ch++) { \
int32_t *bptr = s->sample_buf[ch]; \
const type *sptr = (const type *)samples[ch]; \
for (i = 0; i < s->frame_size; i++) \
bptr[i] = sptr[i] >> shift; \
} \
} while (0)
s
const char * s
Definition: avisynth_c.h:768
shift
static int shift(int a, int b)
Definition: sonic.c:82
channels
channels
Definition: aptx.c:30
ch
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 &&HAVE_MMX) 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
type
cl_device_type type
Definition: hwcontext_opencl.c:189

Referenced by init_sample_buffers().

◆ OFFSET

#define OFFSET (   x)    offsetof(AlacEncodeContext, x)

Definition at line 654 of file alacenc.c.

◆ AE

#define AE   AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM

Definition at line 655 of file alacenc.c.

Referenced by g726_reset().

Function Documentation

◆ init_sample_buffers()

static void init_sample_buffers ( AlacEncodeContext *  s,
int  channels,
const uint8_t *  samples[2] 
)
static

Definition at line 84 of file alacenc.c.

Referenced by write_element().

◆ encode_scalar()

static void encode_scalar ( AlacEncodeContext *  s,
int  x,
int  k,
int  write_sample_size 
)
static

Definition at line 106 of file alacenc.c.

Referenced by alac_entropy_coder().

◆ write_element_header()

static void write_element_header ( AlacEncodeContext *  s,
enum AlacRawDataBlockType  element,
int  instance 
)
static

Definition at line 134 of file alacenc.c.

Referenced by write_element().

◆ calc_predictor_params()

static void calc_predictor_params ( AlacEncodeContext *  s,
int  ch 
)
static

Definition at line 153 of file alacenc.c.

Referenced by write_element().

◆ estimate_stereo_mode()

static int estimate_stereo_mode ( int32_t *  left_ch,
int32_t *  right_ch,
int  n 
)
static

Definition at line 184 of file alacenc.c.

Referenced by alac_stereo_decorrelation().

◆ alac_stereo_decorrelation()

static void alac_stereo_decorrelation ( AlacEncodeContext *  s)
static

Definition at line 217 of file alacenc.c.

Referenced by write_element().

◆ alac_linear_predictor()

static void alac_linear_predictor ( AlacEncodeContext *  s,
int  ch 
)
static

Definition at line 257 of file alacenc.c.

Referenced by write_element().

◆ alac_entropy_coder()

static void alac_entropy_coder ( AlacEncodeContext *  s,
int  ch 
)
static

Definition at line 321 of file alacenc.c.

Referenced by write_element().

◆ write_element()

static void write_element ( AlacEncodeContext *  s,
enum AlacRawDataBlockType  element,
int  instance,
const uint8_t *  samples0,
const uint8_t *  samples1 
)
static

Definition at line 365 of file alacenc.c.

Referenced by write_frame().

◆ write_frame()

static int write_frame ( AlacEncodeContext *  s,
AVPacket *  avpkt,
uint8_t *const *  samples 
)
static

Definition at line 460 of file alacenc.c.

Referenced by alac_encode_frame().

◆ get_max_frame_size()

static av_always_inline int get_max_frame_size ( int  frame_size,
int  ch,
int  bps 
)
static

Definition at line 491 of file alacenc.c.

Referenced by alac_encode_frame(), and alac_encode_init().

◆ alac_encode_close()

static av_cold int alac_encode_close ( AVCodecContext *  avctx)
static

Definition at line 497 of file alacenc.c.

Referenced by alac_encode_init().

◆ alac_encode_init()

static av_cold int alac_encode_init ( AVCodecContext *  avctx)
static

Definition at line 506 of file alacenc.c.

◆ alac_encode_frame()

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

Definition at line 614 of file alacenc.c.

Variable Documentation

◆ options

const AVOption options[]
static
Initial value:
= {
{ "min_prediction_order", NULL, OFFSET(min_prediction_order), AV_OPT_TYPE_INT, { .i64 = DEFAULT_MIN_PRED_ORDER }, MIN_LPC_ORDER, ALAC_MAX_LPC_ORDER, AE },
{ "max_prediction_order", NULL, OFFSET(max_prediction_order), AV_OPT_TYPE_INT, { .i64 = DEFAULT_MAX_PRED_ORDER }, MIN_LPC_ORDER, ALAC_MAX_LPC_ORDER, AE },
{ NULL },
}
DEFAULT_MIN_PRED_ORDER
#define DEFAULT_MIN_PRED_ORDER
Definition: alacenc.c:39
NULL
#define NULL
Definition: coverity.c:32
AV_OPT_TYPE_INT
Definition: opt.h:223
DEFAULT_MAX_PRED_ORDER
#define DEFAULT_MAX_PRED_ORDER
Definition: alacenc.c:38
AE
#define AE
Definition: alacenc.c:655
ALAC_MAX_LPC_ORDER
#define ALAC_MAX_LPC_ORDER
Definition: alacenc.c:37
MIN_LPC_ORDER
#define MIN_LPC_ORDER
Definition: lpc.h:37
OFFSET
#define OFFSET(x)
Definition: alacenc.c:654

Definition at line 656 of file alacenc.c.

◆ alacenc_class

const AVClass alacenc_class
static
Initial value:
= {
.class_name = "alacenc",
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
}
LIBAVUTIL_VERSION_INT
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
av_default_item_name
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:191
options
static const AVOption options[]
Definition: alacenc.c:656

Definition at line 663 of file alacenc.c.

◆ ff_alac_encoder

AVCodec ff_alac_encoder
Initial value:
= {
.name = "alac",
.long_name = NULL_IF_CONFIG_SMALL("ALAC (Apple Lossless Audio Codec)"),
.type = AVMEDIA_TYPE_AUDIO,
.id = AV_CODEC_ID_ALAC,
.priv_data_size = sizeof(AlacEncodeContext),
.priv_class = &alacenc_class,
.init = alac_encode_init,
.encode2 = alac_encode_frame,
.close = alac_encode_close,
.capabilities = AV_CODEC_CAP_SMALL_LAST_FRAME,
.channel_layouts = ff_alac_channel_layouts,
.sample_fmts = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_S32P,
AV_SAMPLE_FMT_S16P,
AV_SAMPLE_FMT_NONE },
}
init
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
AV_SAMPLE_FMT_NONE
Definition: samplefmt.h:59
alac_encode_init
static av_cold int alac_encode_init(AVCodecContext *avctx)
Definition: alacenc.c:506
AV_CODEC_ID_ALAC
Definition: avcodec.h:567
alacenc_class
static const AVClass alacenc_class
Definition: alacenc.c:663
alac_encode_frame
static int alac_encode_frame(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr)
Definition: alacenc.c:614
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
AV_CODEC_CAP_SMALL_LAST_FRAME
#define AV_CODEC_CAP_SMALL_LAST_FRAME
Codec can be fed a final frame with a smaller size.
Definition: avcodec.h:989
AV_SAMPLE_FMT_S32P
signed 32 bits, planar
Definition: samplefmt.h:68
ff_alac_channel_layouts
const uint64_t ff_alac_channel_layouts[ALAC_MAX_CHANNELS+1]
Definition: alac_data.c:35
AVSampleFormat
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:58
channel_layouts
static const uint16_t channel_layouts[7]
Definition: dca_lbr.c:113
alac_encode_close
static av_cold int alac_encode_close(AVCodecContext *avctx)
Definition: alacenc.c:497
sample_fmts
static enum AVSampleFormat sample_fmts[]
Definition: adpcmenc.c:701
AV_SAMPLE_FMT_S16P
signed 16 bits, planar
Definition: samplefmt.h:67

Definition at line 670 of file alacenc.c.

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