2 * Mpeg video formats-related defines and utility functions
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 #ifndef AVCODEC_MPEGPICTURE_H
22 #define AVCODEC_MPEGPICTURE_H
26 #include "libavutil/frame.h"
29 #include "motion_est.h"
32 #define MAX_PICTURE_COUNT 36
35 typedef struct ScratchpadContext {
36 uint8_t *edge_emu_buffer; ///< temporary buffer for if MVs point to out-of-frame data
37 uint8_t *rd_scratchpad; ///< scratchpad for rate distortion mb decision
38 uint8_t *obmc_scratchpad;
39 uint8_t *b_scratchpad; ///< scratchpad used for writing into write only buffers
45 typedef struct Picture {
49 AVBufferRef *qscale_table_buf;
52 AVBufferRef *motion_val_buf[2];
53 int16_t (*motion_val[2])[2];
55 AVBufferRef *mb_type_buf;
56 uint32_t *mb_type; ///< types and macros are defined in mpegutils.h
58 AVBufferRef *mbskip_table_buf;
59 uint8_t *mbskip_table;
61 AVBufferRef *ref_index_buf[2];
64 AVBufferRef *mb_var_buf;
65 uint16_t *mb_var; ///< Table for MB variances
67 AVBufferRef *mc_mb_var_buf;
68 uint16_t *mc_mb_var; ///< Table for motion compensated MB variances
70 int alloc_mb_width; ///< mb_width used to allocate tables
71 int alloc_mb_height; ///< mb_height used to allocate tables
73 AVBufferRef *mb_mean_buf;
74 uint8_t *mb_mean; ///< Table for MB luminance
76 AVBufferRef *hwaccel_priv_buf;
77 void *hwaccel_picture_private; ///< Hardware accelerator private data
79 int field_picture; ///< whether or not the picture was encoded in separate fields
81 int64_t mb_var_sum; ///< sum of MB variance for current frame
82 int64_t mc_mb_var_sum; ///< motion compensated MB variance for current frame
85 int needs_realloc; ///< Picture needs to be reallocated (eg due to a frame size change)
90 uint64_t encoding_error[AV_NUM_DATA_POINTERS];
95 * The pixels are allocated/set by calling get_buffer() if shared = 0.
97 int ff_alloc_picture(AVCodecContext *avctx, Picture *pic, MotionEstContext *me,
98 ScratchpadContext *sc, int shared, int encoding,
99 int chroma_x_shift, int chroma_y_shift, int out_format,
100 int mb_stride, int mb_width, int mb_height, int b8_stride,
101 ptrdiff_t *linesize, ptrdiff_t *uvlinesize);
103 int ff_mpeg_framesize_alloc(AVCodecContext *avctx, MotionEstContext *me,
104 ScratchpadContext *sc, int linesize);
106 int ff_mpeg_ref_picture(AVCodecContext *avctx, Picture *dst, Picture *src);
107 void ff_mpeg_unref_picture(AVCodecContext *avctx, Picture *picture);
109 void ff_free_picture_tables(Picture *pic);
110 int ff_update_picture_tables(Picture *dst, Picture *src);
112 int ff_find_unused_picture(AVCodecContext *avctx, Picture *picture, int shared);
114 #endif /* AVCODEC_MPEGPICTURE_H */