From 5a310246569e19efd50b37016a80fe6171df0329 Mon Sep 17 00:00:00 2001
From: Lynne <dev@lynne.ee>
Date: Sat, 24 Sep 2022 00:51:18 +0200
Subject: [PATCH 2/6] atrac9dec: switch to lavu/tx
---
libavcodec/atrac9dec.c | 21 +++++++++++++--------
1 file changed, 13 insertions(+), 8 deletions(-)
@@ -25,8 +25,8 @@
#include "codec_internal.h"
#include "decode.h"
#include "get_bits.h"
-#include "fft.h"
#include "atrac9tab.h"
+#include "libavutil/tx.h"
#include "libavutil/lfg.h"
#include "libavutil/float_dsp.h"
#include "libavutil/mem_internal.h"
@@ -86,7 +86,8 @@ typedef struct ATRAC9BlockData {
typedef struct ATRAC9Context {
AVCodecContext *avctx;
AVFloatDSPContext *fdsp;
- FFTContext imdct;
+ AVTXContext *tx;
+ av_tx_fn tx_fn;
ATRAC9BlockData block[5];
AVLFG lfg;
@@ -101,7 +102,7 @@ typedef struct ATRAC9Context {
uint8_t alloc_curve[48][48];
DECLARE_ALIGNED(32, float, imdct_win)[256];
- DECLARE_ALIGNED(32, float, temp)[256];
+ DECLARE_ALIGNED(32, float, temp)[2048];
} ATRAC9Context;
static VLC sf_vlc[2][8]; /* Signed/unsigned, length */
@@ -778,7 +779,7 @@ imdct:
const ptrdiff_t offset = wsize*frame_idx*sizeof(float);
float *dst = (float *)(frame->extended_data[dst_idx] + offset);
- s->imdct.imdct_half(&s->imdct, s->temp, c->coeffs);
+ s->tx_fn(s->tx, s->temp, c->coeffs, sizeof(float));
s->fdsp->vector_fmul_window(dst, c->prev_win, s->temp,
s->imdct_win, wsize >> 1);
memcpy(c->prev_win, s->temp + (wsize >> 1), sizeof(float)*wsize >> 1);
@@ -834,7 +835,7 @@ static av_cold int atrac9_decode_close(AVCodecContext *avctx)
{
ATRAC9Context *s = avctx->priv_data;
- ff_mdct_end(&s->imdct);
+ av_tx_uninit(&s->tx);
av_freep(&s->fdsp);
return 0;
@@ -896,10 +897,11 @@ static av_cold void atrac9_init_static(void)
static av_cold int atrac9_decode_init(AVCodecContext *avctx)
{
+ float scale;
static AVOnce static_table_init = AV_ONCE_INIT;
GetBitContext gb;
ATRAC9Context *s = avctx->priv_data;
- int version, block_config_idx, superframe_idx, alloc_c_len;
+ int err, version, block_config_idx, superframe_idx, alloc_c_len;
s->avctx = avctx;
@@ -959,8 +961,11 @@ static av_cold int atrac9_decode_init(AVCodecContext *avctx)
s->frame_count = 1 << superframe_idx;
s->frame_log2 = at9_tab_sri_frame_log2[s->samplerate_idx];
- if (ff_mdct_init(&s->imdct, s->frame_log2 + 1, 1, 1.0f / 32768.0f))
- return AVERROR(ENOMEM);
+ scale = 1.0f / 32768.0;
+ err = av_tx_init(&s->tx, &s->tx_fn, AV_TX_FLOAT_MDCT, 1,
+ 1 << s->frame_log2, &scale, 0);
+ if (err < 0)
+ return err;
s->fdsp = avpriv_float_dsp_alloc(avctx->flags & AV_CODEC_FLAG_BITEXACT);
if (!s->fdsp)
--
2.37.2.609.g9ff673ca1a