Native VP8 decoder.

Patch by David Conrad <lessen42 gmail com> and myself.

Originally committed as revision 23719 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 67 insertions, 0 deletions

diff --git a/libavcodec/vp8dsp.h b/libavcodec/vp8dsp.h
new file mode 100644
index 0000000000..fa7bf76d29
--- /dev/null
+++ b/libavcodec/vp8dsp.h
@@ -0,0 +1,67 @@
+/**
+ * VP8 compatible video decoder
+ *
+ * Copyright (C) 2010 David Conrad
+ * Copyright (C) 2010 Ronald S. Bultje
+ *
+ * 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
+ */
+
+
+#ifndef AVCODEC_VP8DSP_H
+#define AVCODEC_VP8DSP_H
+
+#include "dsputil.h"
+
+typedef struct VP8DSPContext {
+    void (*vp8_luma_dc_wht)(DCTELEM block[4][4][16], DCTELEM dc[16]);
+    void (*vp8_idct_add)(uint8_t *dst, DCTELEM block[16], int stride);
+    void (*vp8_idct_dc_add)(uint8_t *dst, DCTELEM block[16], int stride);
+
+    // loop filter applied to edges between macroblocks
+    void (*vp8_v_loop_filter16)(uint8_t *dst, int stride, int flim_E, int flim_I, int hev_thresh);
+    void (*vp8_h_loop_filter16)(uint8_t *dst, int stride, int flim_E, int flim_I, int hev_thresh);
+    void (*vp8_v_loop_filter8)(uint8_t *dst, int stride, int flim_E, int flim_I, int hev_thresh);
+    void (*vp8_h_loop_filter8)(uint8_t *dst, int stride, int flim_E, int flim_I, int hev_thresh);
+
+    // loop filter applied to inner macroblock edges
+    void (*vp8_v_loop_filter16_inner)(uint8_t *dst, int stride, int flim_E, int flim_I, int hev_thresh);
+    void (*vp8_h_loop_filter16_inner)(uint8_t *dst, int stride, int flim_E, int flim_I, int hev_thresh);
+    void (*vp8_v_loop_filter8_inner)(uint8_t *dst, int stride, int flim_E, int flim_I, int hev_thresh);
+    void (*vp8_h_loop_filter8_inner)(uint8_t *dst, int stride, int flim_E, int flim_I, int hev_thresh);
+
+    void (*vp8_v_loop_filter_simple)(uint8_t *dst, int stride, int flim);
+    void (*vp8_h_loop_filter_simple)(uint8_t *dst, int stride, int flim);
+
+    /**
+     * first dimension: width>>3, height is assumed equal to width
+     * second dimension: 0 if no vertical interpolation is needed;
+     *                   1 4-tap vertical interpolation filter (my & 1)
+     *                   2 6-tap vertical interpolation filter (!(my & 1))
+     * third dimension: same as second dimention, for horizontal interpolation
+     * so something like put_vp8_epel_pixels_tab[width>>3][2*!!my-(my&1)][2*!!mx-(mx&1)](..., mx, my)
+     */
+    h264_chroma_mc_func put_vp8_epel_pixels_tab[3][3][3];
+} VP8DSPContext;
+
+void ff_put_vp8_pixels16_c(uint8_t *dst, uint8_t *src, int stride, int h, int x, int y);
+void ff_put_vp8_pixels8_c(uint8_t *dst, uint8_t *src, int stride, int h, int x, int y);
+void ff_put_vp8_pixels4_c(uint8_t *dst, uint8_t *src, int stride, int h, int x, int y);
+
+void ff_vp8dsp_init(VP8DSPContext *c);
+
+#endif /* AVCODEC_VP8DSP_H */