Rename ffmpeg-4.2-fit to ffmpeg-4-fit

trunk/3rdparty/ffmpeg-4-fit/libavcodec/avfft.c

@@ -0,0 +1,145 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "libavutil/attributes.h"
+#include "libavutil/mem.h"
+#include "avfft.h"
+#include "fft.h"
+#include "rdft.h"
+#include "dct.h"
+
+/* FFT */
+
+FFTContext *av_fft_init(int nbits, int inverse)
+{
+    FFTContext *s = av_mallocz(sizeof(*s));
+
+    if (s && ff_fft_init(s, nbits, inverse))
+        av_freep(&s);
+
+    return s;
+}
+
+void av_fft_permute(FFTContext *s, FFTComplex *z)
+{
+    s->fft_permute(s, z);
+}
+
+void av_fft_calc(FFTContext *s, FFTComplex *z)
+{
+    s->fft_calc(s, z);
+}
+
+av_cold void av_fft_end(FFTContext *s)
+{
+    if (s) {
+        ff_fft_end(s);
+        av_free(s);
+    }
+}
+
+#if CONFIG_MDCT
+
+FFTContext *av_mdct_init(int nbits, int inverse, double scale)
+{
+    FFTContext *s = av_malloc(sizeof(*s));
+
+    if (s && ff_mdct_init(s, nbits, inverse, scale))
+        av_freep(&s);
+
+    return s;
+}
+
+void av_imdct_calc(FFTContext *s, FFTSample *output, const FFTSample *input)
+{
+    s->imdct_calc(s, output, input);
+}
+
+void av_imdct_half(FFTContext *s, FFTSample *output, const FFTSample *input)
+{
+    s->imdct_half(s, output, input);
+}
+
+void av_mdct_calc(FFTContext *s, FFTSample *output, const FFTSample *input)
+{
+    s->mdct_calc(s, output, input);
+}
+
+av_cold void av_mdct_end(FFTContext *s)
+{
+    if (s) {
+        ff_mdct_end(s);
+        av_free(s);
+    }
+}
+
+#endif /* CONFIG_MDCT */
+
+#if CONFIG_RDFT
+
+RDFTContext *av_rdft_init(int nbits, enum RDFTransformType trans)
+{
+    RDFTContext *s = av_malloc(sizeof(*s));
+
+    if (s && ff_rdft_init(s, nbits, trans))
+        av_freep(&s);
+
+    return s;
+}
+
+void av_rdft_calc(RDFTContext *s, FFTSample *data)
+{
+    s->rdft_calc(s, data);
+}
+
+av_cold void av_rdft_end(RDFTContext *s)
+{
+    if (s) {
+        ff_rdft_end(s);
+        av_free(s);
+    }
+}
+
+#endif /* CONFIG_RDFT */
+
+#if CONFIG_DCT
+
+DCTContext *av_dct_init(int nbits, enum DCTTransformType inverse)
+{
+    DCTContext *s = av_malloc(sizeof(*s));
+
+    if (s && ff_dct_init(s, nbits, inverse))
+        av_freep(&s);
+
+    return s;
+}
+
+void av_dct_calc(DCTContext *s, FFTSample *data)
+{
+    s->dct_calc(s, data);
+}
+
+av_cold void av_dct_end(DCTContext *s)
+{
+    if (s) {
+        ff_dct_end(s);
+        av_free(s);
+    }
+}
+
+#endif /* CONFIG_DCT */