dsputil: Split audio operations off into a separate context

1 files changed, 59 insertions, 0 deletions

diff --git a/libavcodec/audiodsp.h b/libavcodec/audiodsp.h
new file mode 100644
index 0000000000..58205a1f19
--- /dev/null
+++ b/libavcodec/audiodsp.h
@@ -0,0 +1,59 @@
+/*
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_AUDIODSP_H
+#define AVCODEC_AUDIODSP_H
+
+#include <stdint.h>
+
+typedef struct AudioDSPContext {
+    /**
+     * Calculate scalar product of two vectors.
+     * @param len length of vectors, should be multiple of 16
+     */
+    int32_t (*scalarproduct_int16)(const int16_t *v1,
+                                   const int16_t *v2 /* align 16 */, int len);
+
+    /**
+     * Clip each element in an array of int32_t to a given minimum and
+     * maximum value.
+     * @param dst  destination array
+     *             constraints: 16-byte aligned
+     * @param src  source array
+     *             constraints: 16-byte aligned
+     * @param min  minimum value
+     *             constraints: must be in the range [-(1 << 24), 1 << 24]
+     * @param max  maximum value
+     *             constraints: must be in the range [-(1 << 24), 1 << 24]
+     * @param len  number of elements in the array
+     *             constraints: multiple of 32 greater than zero
+     */
+    void (*vector_clip_int32)(int32_t *dst, const int32_t *src, int32_t min,
+                              int32_t max, unsigned int len);
+    /* assume len is a multiple of 8, and arrays are 16-byte aligned */
+    void (*vector_clipf)(float *dst /* align 16 */,
+                         const float *src /* align 16 */,
+                         float min, float max, int len /* align 16 */);
+} AudioDSPContext;
+
+void ff_audiodsp_init(AudioDSPContext *c);
+void ff_audiodsp_init_arm(AudioDSPContext *c);
+void ff_audiodsp_init_ppc(AudioDSPContext *c);
+void ff_audiodsp_init_x86(AudioDSPContext *c);
+
+#endif /* AVCODEC_AUDIODSP_H */