mpegvideo: Move Picture-related functions to a separate file

1 files changed, 109 insertions, 0 deletions

diff --git a/libavcodec/mpegpicture.h b/libavcodec/mpegpicture.h
new file mode 100644
index 0000000000..0588f02ee5
--- /dev/null
+++ b/libavcodec/mpegpicture.h
@@ -0,0 +1,109 @@
+/*
+ * Mpeg video formats-related defines and utility functions
+ *
+ * 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_MPEGPICTURE_H
+#define AVCODEC_MPEGPICTURE_H
+
+#include <stdint.h>
+
+#include "libavutil/frame.h"
+
+#include "avcodec.h"
+#include "motion_est.h"
+#include "thread.h"
+
+#define MAX_PICTURE_COUNT 32
+#define EDGE_WIDTH 16
+
+typedef struct ScratchpadContext {
+    uint8_t *edge_emu_buffer;     ///< temporary buffer for if MVs point to out-of-frame data
+    uint8_t *rd_scratchpad;       ///< scratchpad for rate distortion mb decision
+    uint8_t *obmc_scratchpad;
+    uint8_t *b_scratchpad;        ///< scratchpad used for writing into write only buffers
+} ScratchpadContext;
+
+/**
+ * Picture.
+ */
+typedef struct Picture {
+    struct AVFrame *f;
+    ThreadFrame tf;
+
+    AVBufferRef *qscale_table_buf;
+    int8_t *qscale_table;
+
+    AVBufferRef *motion_val_buf[2];
+    int16_t (*motion_val[2])[2];
+
+    AVBufferRef *mb_type_buf;
+    uint32_t *mb_type;          ///< types and macros are defined in mpegutils.h
+
+    AVBufferRef *mbskip_table_buf;
+    uint8_t *mbskip_table;
+
+    AVBufferRef *ref_index_buf[2];
+    int8_t *ref_index[2];
+
+    AVBufferRef *mb_var_buf;
+    uint16_t *mb_var;           ///< Table for MB variances
+
+    AVBufferRef *mc_mb_var_buf;
+    uint16_t *mc_mb_var;        ///< Table for motion compensated MB variances
+
+    AVBufferRef *mb_mean_buf;
+    uint8_t *mb_mean;           ///< Table for MB luminance
+
+    AVBufferRef *hwaccel_priv_buf;
+    void *hwaccel_picture_private; ///< Hardware accelerator private data
+
+    int field_picture;          ///< whether or not the picture was encoded in separate fields
+
+    int mb_var_sum;             ///< sum of MB variance for current frame
+    int mc_mb_var_sum;          ///< motion compensated MB variance for current frame
+
+    int b_frame_score;          /* */
+    int needs_realloc;          ///< Picture needs to be reallocated (eg due to a frame size change)
+
+    int reference;
+    int shared;
+} Picture;
+
+/**
+ * Allocate a Picture.
+ * The pixels are allocated/set by calling get_buffer() if shared = 0.
+ */
+int ff_alloc_picture(AVCodecContext *avctx, Picture *pic, MotionEstContext *me,
+                     ScratchpadContext *sc, int shared, int encoding,
+                     int chroma_x_shift, int chroma_y_shift, int out_format,
+                     int mb_stride, int mb_height, int b8_stride,
+                     ptrdiff_t *linesize, ptrdiff_t *uvlinesize);
+
+int ff_mpeg_framesize_alloc(AVCodecContext *avctx, MotionEstContext *me,
+                            ScratchpadContext *sc, int linesize);
+
+int ff_mpeg_ref_picture(AVCodecContext *avctx, Picture *dst, Picture *src);
+void ff_mpeg_unref_picture(AVCodecContext *avctx, Picture *picture);
+
+void ff_free_picture_tables(Picture *pic);
+int ff_update_picture_tables(Picture *dst, Picture *src);
+
+int ff_find_unused_picture(AVCodecContext *avctx, Picture *picture, int shared);
+
+#endif /* AVCODEC_MPEGPICTURE_H */