chromium/third_party/ffmpeg/libavformat/seek.c

/*
 * Seeking and index-related functions
 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
 *
 * 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
 */

#include <stdint.h>

#include "libavutil/avassert.h"
#include "libavutil/mathematics.h"
#include "libavutil/mem.h"
#include "libavutil/timestamp.h"

#include "libavcodec/avcodec.h"

#include "avformat.h"
#include "avio_internal.h"
#include "demux.h"
#include "internal.h"

void avpriv_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp)
{ … }

void ff_reduce_index(AVFormatContext *s, int stream_index)
{ … }

int ff_add_index_entry(AVIndexEntry **index_entries,
                       int *nb_index_entries,
                       unsigned int *index_entries_allocated_size,
                       int64_t pos, int64_t timestamp,
                       int size, int distance, int flags)
{ … }

int av_add_index_entry(AVStream *st, int64_t pos, int64_t timestamp,
                       int size, int distance, int flags)
{ … }

int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
                              int64_t wanted_timestamp, int flags)
{ … }

void ff_configure_buffers_for_index(AVFormatContext *s, int64_t time_tolerance)
{ … }

int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp, int flags)
{ … }

int avformat_index_get_entries_count(const AVStream *st)
{ … }

const AVIndexEntry *avformat_index_get_entry(AVStream *st, int idx)
{ … }

const AVIndexEntry *avformat_index_get_entry_from_timestamp(AVStream *st,
                                                            int64_t wanted_timestamp,
                                                            int flags)
{ … }

static int64_t read_timestamp(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit,
                              int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ))
{ … }

int ff_seek_frame_binary(AVFormatContext *s, int stream_index,
                         int64_t target_ts, int flags)
{ … }

int ff_find_last_ts(AVFormatContext *s, int stream_index, int64_t *ts, int64_t *pos,
                    int64_t (*read_timestamp_func)(struct AVFormatContext *, int , int64_t *, int64_t ))
{ … }

int64_t ff_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts,
                      int64_t pos_min, int64_t pos_max, int64_t pos_limit,
                      int64_t ts_min, int64_t ts_max,
                      int flags, int64_t *ts_ret,
                      int64_t (*read_timestamp_func)(struct AVFormatContext *,
                                                     int, int64_t *, int64_t))
{ … }

static int seek_frame_byte(AVFormatContext *s, int stream_index,
                           int64_t pos, int flags)
{ … }

static int seek_frame_generic(AVFormatContext *s, int stream_index,
                              int64_t timestamp, int flags)
{ … }

static int seek_frame_internal(AVFormatContext *s, int stream_index,
                               int64_t timestamp, int flags)
{ … }

int av_seek_frame(AVFormatContext *s, int stream_index,
                  int64_t timestamp, int flags)
{ … }

int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts,
                       int64_t ts, int64_t max_ts, int flags)
{ … }

/** Flush the frame reader. */
void ff_read_frame_flush(AVFormatContext *s)
{ … }

int avformat_flush(AVFormatContext *s)
{ … }

void ff_rescale_interval(AVRational tb_in, AVRational tb_out,
                         int64_t *min_ts, int64_t *ts, int64_t *max_ts)
{ … }