mirror of
https://github.com/hrydgard/ppsspp.git
synced 2026-11-02 12:32:03 +01:00
Henrik RydgårdandClaude Opus 5.5
d0e3141f43
The ffmpeg submodule held prebuilt libraries for every platform next to the sources (about 1.5 GB checked out), and nothing uses those any more. Only the needed sources are copied in, from the submodule's commit, along with every header and template they include. The path is new, so checking out commits on either side of this works. It's also cut down to what PPSSPP uses: the H.264, AAC, MP3, ATRAC3 and ATRAC3+ decoders, the H.264 parser, the demuxers as before, and the FFV1 encoder, AVI muxer and file protocol for AVI dumping. config.h takes its CONFIG_ values from FFmpeg 3.0.2's own configure run with just those enabled. The raw H.264 demuxer stays even though nothing opens raw H.264: probing PSMF data uses it to identify the video stream's codec, which otherwise comes out as none. On top of that: - The files nothing links (configure would build them, but they're never pulled out of the static library, going by the GCC link map) are left out: mostly libavutil's crypto and hashing and the alternative DCT/IDCT/FFT versions. - libswresample isn't built, now that nothing uses it. - The H.264 decoder only does 8-bit video, which is all the PSP has. The SPS parser rejects any other bit depth, and the DSP files no longer build their 9- to 16-bit variants, which the linker kept because the init functions pick one by bit depth at run time. That's 160 files to compile instead of 277, and 391 of FFmpeg's vendored, about 5.8 MB. The README in ext/ffmpeg has what was done, the PPSSPP patches in the copy, how to add a component, and the tradeoffs. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
115 lines
3.8 KiB
C
115 lines
3.8 KiB
C
/*
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* Mpeg video formats-related defines and utility functions
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVCODEC_MPEGPICTURE_H
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#define AVCODEC_MPEGPICTURE_H
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#include <stdint.h>
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#include "libavutil/frame.h"
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#include "avcodec.h"
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#include "motion_est.h"
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#include "thread.h"
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#define MAX_PICTURE_COUNT 36
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#define EDGE_WIDTH 16
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typedef struct ScratchpadContext {
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uint8_t *edge_emu_buffer; ///< temporary buffer for if MVs point to out-of-frame data
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uint8_t *rd_scratchpad; ///< scratchpad for rate distortion mb decision
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uint8_t *obmc_scratchpad;
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uint8_t *b_scratchpad; ///< scratchpad used for writing into write only buffers
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} ScratchpadContext;
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/**
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* Picture.
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*/
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typedef struct Picture {
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struct AVFrame *f;
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ThreadFrame tf;
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AVBufferRef *qscale_table_buf;
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int8_t *qscale_table;
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AVBufferRef *motion_val_buf[2];
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int16_t (*motion_val[2])[2];
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AVBufferRef *mb_type_buf;
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uint32_t *mb_type; ///< types and macros are defined in mpegutils.h
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AVBufferRef *mbskip_table_buf;
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uint8_t *mbskip_table;
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AVBufferRef *ref_index_buf[2];
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int8_t *ref_index[2];
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AVBufferRef *mb_var_buf;
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uint16_t *mb_var; ///< Table for MB variances
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AVBufferRef *mc_mb_var_buf;
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uint16_t *mc_mb_var; ///< Table for motion compensated MB variances
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int alloc_mb_width; ///< mb_width used to allocate tables
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int alloc_mb_height; ///< mb_height used to allocate tables
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AVBufferRef *mb_mean_buf;
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uint8_t *mb_mean; ///< Table for MB luminance
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AVBufferRef *hwaccel_priv_buf;
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void *hwaccel_picture_private; ///< Hardware accelerator private data
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int field_picture; ///< whether or not the picture was encoded in separate fields
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int64_t mb_var_sum; ///< sum of MB variance for current frame
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int64_t mc_mb_var_sum; ///< motion compensated MB variance for current frame
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int b_frame_score;
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int needs_realloc; ///< Picture needs to be reallocated (eg due to a frame size change)
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int reference;
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int shared;
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uint64_t encoding_error[AV_NUM_DATA_POINTERS];
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} Picture;
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/**
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* Allocate a Picture.
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* The pixels are allocated/set by calling get_buffer() if shared = 0.
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*/
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int ff_alloc_picture(AVCodecContext *avctx, Picture *pic, MotionEstContext *me,
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ScratchpadContext *sc, int shared, int encoding,
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int chroma_x_shift, int chroma_y_shift, int out_format,
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int mb_stride, int mb_width, int mb_height, int b8_stride,
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ptrdiff_t *linesize, ptrdiff_t *uvlinesize);
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int ff_mpeg_framesize_alloc(AVCodecContext *avctx, MotionEstContext *me,
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ScratchpadContext *sc, int linesize);
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int ff_mpeg_ref_picture(AVCodecContext *avctx, Picture *dst, Picture *src);
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void ff_mpeg_unref_picture(AVCodecContext *avctx, Picture *picture);
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void ff_free_picture_tables(Picture *pic);
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int ff_update_picture_tables(Picture *dst, Picture *src);
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int ff_find_unused_picture(AVCodecContext *avctx, Picture *picture, int shared);
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#endif /* AVCODEC_MPEGPICTURE_H */
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