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avcodec/qdmc: switch to fft from lavu/tx

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This commit is contained in:
Paul B Mahol 2022-02-12 14:21:04 +01:00
parent fcee53619a
commit fad5c6d743
2 changed files with 14 additions and 13 deletions
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1
configure vendored
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@ -3295,7 +3295,6 @@ mp2_at_decoder_select="mpegaudioheader"
mp3_at_decoder_select="mpegaudioheader"
pcm_alaw_at_decoder_deps="audiotoolbox"
pcm_mulaw_at_decoder_deps="audiotoolbox"
qdmc_decoder_select="fft"
qdmc_at_decoder_deps="audiotoolbox"
qdm2_at_decoder_deps="audiotoolbox"
aac_at_encoder_deps="audiotoolbox"

26
libavcodec/qdmc.c
View File

@ -27,12 +27,12 @@
#include "libavutil/channel_layout.h"
#include "libavutil/thread.h"
#include "libavutil/tx.h"
#include "avcodec.h"
#include "bytestream.h"
#include "get_bits.h"
#include "internal.h"
#include "fft.h"
typedef struct QDMCTone {
uint8_t mode;
@ -66,8 +66,10 @@ typedef struct QDMCContext {
float *buffer_ptr;
int rndval;
DECLARE_ALIGNED(32, FFTComplex, cmplx)[2][512];
FFTContext fft_ctx;
DECLARE_ALIGNED(32, AVComplexFloat, cmplx_in)[2][512];
DECLARE_ALIGNED(32, AVComplexFloat, cmplx_out)[2][512];
AVTXContext *fft_ctx;
av_tx_fn itx_fn;
} QDMCContext;
static float sin_table[512];
@ -207,6 +209,7 @@ static av_cold int qdmc_decode_init(AVCodecContext *avctx)
static AVOnce init_static_once = AV_ONCE_INIT;
QDMCContext *s = avctx->priv_data;
int ret, fft_size, fft_order, size, g, j, x;
float scale = 1.f;
GetByteContext b;
ff_thread_once(&init_static_once, qdmc_init_static_data);
@ -291,7 +294,7 @@ static av_cold int qdmc_decode_init(AVCodecContext *avctx)
return AVERROR_INVALIDDATA;
}
ret = ff_fft_init(&s->fft_ctx, fft_order, 1);
ret = av_tx_init(&s->fft_ctx, &s->itx_fn, AV_TX_FLOAT_FFT, 1, 1 << fft_order, &scale, 0);
if (ret < 0)
return ret;
@ -311,7 +314,7 @@ static av_cold int qdmc_decode_close(AVCodecContext *avctx)
{
QDMCContext *s = avctx->priv_data;
ff_fft_end(&s->fft_ctx);
av_tx_uninit(&s->fft_ctx);
return 0;
}
@ -641,22 +644,21 @@ static int decode_frame(QDMCContext *s, GetBitContext *gb, int16_t *out)
for (ch = 0; ch < s->nb_channels; ch++) {
for (i = 0; i < s->subframe_size; i++) {
s->cmplx[ch][i].re = s->fft_buffer[ch + 2][s->fft_offset + n * s->subframe_size + i];
s->cmplx[ch][i].im = s->fft_buffer[ch + 0][s->fft_offset + n * s->subframe_size + i];
s->cmplx[ch][s->subframe_size + i].re = 0;
s->cmplx[ch][s->subframe_size + i].im = 0;
s->cmplx_in[ch][i].re = s->fft_buffer[ch + 2][s->fft_offset + n * s->subframe_size + i];
s->cmplx_in[ch][i].im = s->fft_buffer[ch + 0][s->fft_offset + n * s->subframe_size + i];
s->cmplx_in[ch][s->subframe_size + i].re = 0;
s->cmplx_in[ch][s->subframe_size + i].im = 0;
}
}
for (ch = 0; ch < s->nb_channels; ch++) {
s->fft_ctx.fft_permute(&s->fft_ctx, s->cmplx[ch]);
s->fft_ctx.fft_calc(&s->fft_ctx, s->cmplx[ch]);
s->itx_fn(s->fft_ctx, s->cmplx_out[ch], s->cmplx_in[ch], sizeof(float));
}
r = &s->buffer_ptr[s->nb_channels * n * s->subframe_size];
for (i = 0; i < 2 * s->subframe_size; i++) {
for (ch = 0; ch < s->nb_channels; ch++) {
*r++ += s->cmplx[ch][i].re;
*r++ += s->cmplx_out[ch][i].re;
}
}