FFmpeg
|
ALAC (Apple Lossless Audio Codec) decoder. More...
#include <inttypes.h>
#include "libavutil/channel_layout.h"
#include "libavutil/opt.h"
#include "avcodec.h"
#include "get_bits.h"
#include "bytestream.h"
#include "internal.h"
#include "thread.h"
#include "unary.h"
#include "mathops.h"
#include "alac_data.h"
Go to the source code of this file.
Data Structures | |
struct | ALACContext |
Macros | |
#define | ALAC_EXTRADATA_SIZE 36 |
Functions | |
static unsigned int | decode_scalar (GetBitContext *gb, int k, int bps) |
static int | rice_decompress (ALACContext *alac, int32_t *output_buffer, int nb_samples, int bps, int rice_history_mult) |
static int | sign_only (int v) |
static void | lpc_prediction (int32_t *error_buffer, int32_t *buffer_out, int nb_samples, int bps, int16_t *lpc_coefs, int lpc_order, int lpc_quant) |
static void | decorrelate_stereo (int32_t *buffer[2], int nb_samples, int decorr_shift, int decorr_left_weight) |
static void | append_extra_bits (int32_t *buffer[2], int32_t *extra_bits_buffer[2], int extra_bits, int channels, int nb_samples) |
static int | decode_element (AVCodecContext *avctx, AVFrame *frame, int ch_index, int channels) |
static int | alac_decode_frame (AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *avpkt) |
static av_cold int | alac_decode_close (AVCodecContext *avctx) |
static int | allocate_buffers (ALACContext *alac) |
static int | alac_set_info (ALACContext *alac) |
static av_cold int | alac_decode_init (AVCodecContext *avctx) |
static int | init_thread_copy (AVCodecContext *avctx) |
Variables | |
static const AVOption | options [] |
static const AVClass | alac_class |
AVCodec | ff_alac_decoder |
ALAC (Apple Lossless Audio Codec) decoder.
Note: This decoder expects a 36-byte QuickTime atom to be passed through the extradata[_size] fields. This atom is tacked onto the end of an 'alac' stsd atom and has the following format:
32bit atom size 32bit tag ("alac") 32bit tag version (0) 32bit samples per frame (used when not set explicitly in the frames) 8bit compatible version (0) 8bit sample size 8bit history mult (40) 8bit initial history (10) 8bit rice param limit (14) 8bit channels 16bit maxRun (255) 32bit max coded frame size (0 means unknown) 32bit average bitrate (0 means unknown) 32bit samplerate
Definition in file alac.c.
#define ALAC_EXTRADATA_SIZE 36 |
Definition at line 61 of file alac.c.
Referenced by alac_decode_init().
|
inlinestatic |
Definition at line 86 of file alac.c.
Referenced by rice_decompress().
|
static |
Definition at line 108 of file alac.c.
Referenced by decode_element().
|
inlinestatic |
Definition at line 165 of file alac.c.
Referenced by lpc_prediction().
|
static |
Definition at line 170 of file alac.c.
Referenced by decode_element().
|
static |
Definition at line 233 of file alac.c.
Referenced by decode_element().
|
static |
Definition at line 252 of file alac.c.
Referenced by decode_element().
|
static |
Definition at line 262 of file alac.c.
Referenced by alac_decode_frame().
|
static |
|
static |
Definition at line 517 of file alac.c.
Referenced by allocate_buffers().
|
static |
Definition at line 532 of file alac.c.
Referenced by alac_decode_init(), and init_thread_copy().
|
static |
Definition at line 556 of file alac.c.
Referenced by alac_decode_init().
|
static |
|
static |
|
static |
|
static |
AVCodec ff_alac_decoder |