From 685ac65ce0f391fd1d3a06e191c9659dacd375be Mon Sep 17 00:00:00 2001
From: Lynne <dev@lynne.ee>
Date: Sat, 24 Sep 2022 01:07:44 +0200
Subject: [PATCH 5/6] twinvq: convert to lavu/tx

---
 libavcodec/twinvq.c | 12 +++++++-----
 libavcodec/twinvq.h |  6 ++++--
 2 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/libavcodec/twinvq.c b/libavcodec/twinvq.c
index da10923d78..8cd3c91e14 100644
--- a/libavcodec/twinvq.c
+++ b/libavcodec/twinvq.c
@@ -328,7 +328,8 @@ static const uint8_t wtype_to_wsize[] = { 0, 0, 2, 2, 2, 1, 0, 1, 1 };
 static void imdct_and_window(TwinVQContext *tctx, enum TwinVQFrameType ftype,
                              int wtype, float *in, float *prev, int ch)
 {
-    FFTContext *mdct = &tctx->mdct_ctx[ftype];
+    AVTXContext *tx = tctx->tx[ftype];
+    av_tx_fn tx_fn = tctx->tx_fn[ftype];
     const TwinVQModeTab *mtab = tctx->mtab;
     int bsize = mtab->size / mtab->fmode[ftype].sub;
     int size  = mtab->size;
@@ -357,7 +358,7 @@ static void imdct_and_window(TwinVQContext *tctx, enum TwinVQFrameType ftype,
 
         wsize = types_sizes[wtype_to_wsize[sub_wtype]];
 
-        mdct->imdct_half(mdct, buf1 + bsize * j, in + bsize * j);
+        tx_fn(tx, buf1 + bsize * j, in + bsize * j, sizeof(float));
 
         tctx->fdsp->vector_fmul_window(out2, prev_buf + (bsize - wsize) / 2,
                                       buf1 + bsize * j,
@@ -543,8 +544,9 @@ static av_cold int init_mdct_win(TwinVQContext *tctx)
 
     for (i = 0; i < 3; i++) {
         int bsize = tctx->mtab->size / tctx->mtab->fmode[i].sub;
-        if ((ret = ff_mdct_init(&tctx->mdct_ctx[i], av_log2(bsize) + 1, 1,
-                                -sqrt(norm / bsize) / (1 << 15))))
+        const float scale = -sqrt(norm / bsize) / (1 << 15);
+        if ((ret = av_tx_init(&tctx->tx[i], &tctx->tx_fn[i], AV_TX_FLOAT_MDCT,
+                              1, bsize, &scale, 0)))
             return ret;
     }
 
@@ -745,7 +747,7 @@ av_cold int ff_twinvq_decode_close(AVCodecContext *avctx)
     int i;
 
     for (i = 0; i < 3; i++) {
-        ff_mdct_end(&tctx->mdct_ctx[i]);
+        av_tx_uninit(&tctx->tx[i]);
         av_freep(&tctx->cos_tabs[i]);
     }
 
diff --git a/libavcodec/twinvq.h b/libavcodec/twinvq.h
index b3c881cfac..72b9ba8198 100644
--- a/libavcodec/twinvq.h
+++ b/libavcodec/twinvq.h
@@ -25,10 +25,11 @@
 #include <math.h>
 #include <stdint.h>
 
+#include "libavutil/tx.h"
 #include "libavutil/common.h"
 #include "libavutil/float_dsp.h"
 #include "avcodec.h"
-#include "fft.h"
+#include "internal.h"
 
 enum TwinVQCodec {
     TWINVQ_CODEC_VQF,
@@ -136,7 +137,8 @@ typedef struct TwinVQModeTab {
 typedef struct TwinVQContext {
     AVCodecContext *avctx;
     AVFloatDSPContext *fdsp;
-    FFTContext mdct_ctx[3];
+    AVTXContext *tx[3];
+    av_tx_fn tx_fn[3];
 
     const TwinVQModeTab *mtab;
 
-- 
2.37.2.609.g9ff673ca1a