107 lines
3.5 KiB
C
107 lines
3.5 KiB
C
/* SPDX-FileCopyrightText: 2023 Blender Authors
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*
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* SPDX-License-Identifier: GPL-2.0-or-later */
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/** \file
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* \ingroup imbuf
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*/
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#pragma once
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#ifdef WIN32
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# include <io.h>
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#endif
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#include "IMB_anim.h"
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#include <stdio.h>
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#include <stdlib.h>
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/*
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* separate animation index files to solve the following problems:
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*
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* a) different time-codes within one file (like DTS/PTS, Time-code-Track,
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* "implicit" time-codes within DV-files and HDV-files etc.)
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* b) seeking difficulties within FFMPEG for files with timestamp holes
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* c) broken files that miss several frames / have varying frame-rates
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* d) use proxies accordingly
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*
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* ... we need index files, that provide us with
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*
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* the binary(!) position, where we have to seek into the file *and*
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* the continuous frame number (ignoring the holes) starting from the
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* beginning of the file, so that we know, which proxy frame to serve.
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*
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* This index has to be only built once for a file and is written into
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* the BL_proxy directory structure for later reuse in different blender files.
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*/
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typedef struct anim_index_entry {
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int frameno;
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uint64_t seek_pos;
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uint64_t seek_pos_pts;
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uint64_t seek_pos_dts;
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uint64_t pts;
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} anim_index_entry;
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struct anim_index {
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char filepath[1024];
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int num_entries;
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struct anim_index_entry *entries;
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};
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struct anim_index_builder;
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typedef struct anim_index_builder {
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FILE *fp;
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char filepath[FILE_MAX];
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char filepath_temp[FILE_MAX];
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void *private_data;
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void (*delete_priv_data)(struct anim_index_builder *idx);
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void (*proc_frame)(struct anim_index_builder *idx,
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unsigned char *buffer,
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int data_size,
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struct anim_index_entry *entry);
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} anim_index_builder;
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anim_index_builder *IMB_index_builder_create(const char *filepath);
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void IMB_index_builder_add_entry(anim_index_builder *fp,
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int frameno,
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uint64_t seek_pos,
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uint64_t seek_pos_pts,
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uint64_t seek_pos_dts,
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uint64_t pts);
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void IMB_index_builder_proc_frame(anim_index_builder *fp,
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unsigned char *buffer,
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int data_size,
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int frameno,
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uint64_t seek_pos,
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uint64_t seek_pos_pts,
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uint64_t seek_pos_dts,
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uint64_t pts);
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void IMB_index_builder_finish(anim_index_builder *fp, int rollback);
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struct anim_index *IMB_indexer_open(const char *name);
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uint64_t IMB_indexer_get_seek_pos(struct anim_index *idx, int frame_index);
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uint64_t IMB_indexer_get_seek_pos_pts(struct anim_index *idx, int frame_index);
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uint64_t IMB_indexer_get_seek_pos_dts(struct anim_index *idx, int frame_index);
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int IMB_indexer_get_frame_index(struct anim_index *idx, int frameno);
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uint64_t IMB_indexer_get_pts(struct anim_index *idx, int frame_index);
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int IMB_indexer_get_duration(struct anim_index *idx);
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int IMB_indexer_can_scan(struct anim_index *idx, int old_frame_index, int new_frame_index);
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void IMB_indexer_close(struct anim_index *idx);
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void IMB_free_indices(struct anim *anim);
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struct anim *IMB_anim_open_proxy(struct anim *anim, IMB_Proxy_Size preview_size);
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struct anim_index *IMB_anim_open_index(struct anim *anim, IMB_Timecode_Type tc);
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int IMB_proxy_size_to_array_index(IMB_Proxy_Size pr_size);
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int IMB_timecode_to_array_index(IMB_Timecode_Type tc);
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