FFmpeg
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#include "libavutil/channel_layout.h"
#include "libavutil/float_dsp.h"
#include "libavutil/internal.h"
#include "libavutil/mem_internal.h"
#include "avcodec.h"
#include "celp_filters.h"
#include "get_bits.h"
#include "internal.h"
#include "lpc.h"
#include "ra288.h"
Go to the source code of this file.
Data Structures | |
struct | RA288Context |
Macros | |
#define | BITSTREAM_READER_LE |
#define | MAX_BACKWARD_FILTER_ORDER 36 |
#define | MAX_BACKWARD_FILTER_LEN 40 |
#define | MAX_BACKWARD_FILTER_NONREC 35 |
#define | RA288_BLOCK_SIZE 5 |
#define | RA288_BLOCKS_PER_FRAME 32 |
Functions | |
static av_cold int | ra288_decode_init (AVCodecContext *avctx) |
static void | convolve (float *tgt, const float *src, int len, int n) |
static void | decode (RA288Context *ractx, float gain, int cb_coef) |
static void | do_hybrid_window (RA288Context *ractx, int order, int n, int non_rec, float *out, float *hist, float *out2, const float *window) |
Hybrid window filtering, see blocks 36 and 49 of the G.728 specification. More... | |
static void | backward_filter (RA288Context *ractx, float *hist, float *rec, const float *window, float *lpc, const float *tab, int order, int n, int non_rec, int move_size) |
Backward synthesis filter, find the LPC coefficients from past speech data. More... | |
static int | ra288_decode_frame (AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *avpkt) |
Variables | |
AVCodec | ff_ra_288_decoder |
#define MAX_BACKWARD_FILTER_ORDER 36 |
Definition at line 35 of file ra288.c.
Referenced by backward_filter(), and do_hybrid_window().
#define MAX_BACKWARD_FILTER_LEN 40 |
Definition at line 36 of file ra288.c.
Referenced by do_hybrid_window().
#define MAX_BACKWARD_FILTER_NONREC 35 |
Definition at line 37 of file ra288.c.
Referenced by do_hybrid_window().
#define RA288_BLOCK_SIZE 5 |
Definition at line 39 of file ra288.c.
Referenced by ra288_decode_frame().
#define RA288_BLOCKS_PER_FRAME 32 |
Definition at line 40 of file ra288.c.
Referenced by ra288_decode_frame().
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Definition at line 88 of file ra288.c.
Referenced by do_hybrid_window().
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Definition at line 95 of file ra288.c.
Referenced by ra288_decode_frame().
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Hybrid window filtering, see blocks 36 and 49 of the G.728 specification.
order | filter order |
n | input length |
non_rec | number of non-recursive samples |
out | filter output |
hist | pointer to the input history of the filter |
out | pointer to the non-recursive part of the output |
out2 | pointer to the recursive part of the output |
window | pointer to the windowing function table |
Definition at line 144 of file ra288.c.
Referenced by backward_filter().
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Backward synthesis filter, find the LPC coefficients from past speech data.
Definition at line 174 of file ra288.c.
Referenced by ra288_decode_frame().
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AVCodec ff_ra_288_decoder |