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Diffstat (limited to 'libavformat/seek.h')
-rw-r--r-- | libavformat/seek.h | 122 |
1 files changed, 0 insertions, 122 deletions
diff --git a/libavformat/seek.h b/libavformat/seek.h deleted file mode 100644 index 44cd369f4e..0000000000 --- a/libavformat/seek.h +++ /dev/null @@ -1,122 +0,0 @@ -/* - * seek utility functions for use within format handlers - * - * Copyright (c) 2009 Ivan Schreter - * - * 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 AVFORMAT_SEEK_H -#define AVFORMAT_SEEK_H - -#include "avformat.h" - -/** - * structure to store parser state of one AVStream - */ -typedef struct AVParserStreamState { - // saved members of AVStream - AVCodecParserContext *parser; - int64_t last_IP_pts; - int64_t cur_dts; - int probe_packets; -} AVParserStreamState; - -/** - * structure to store parser state of AVFormat - */ -typedef struct AVParserState { - int64_t fpos; ///< file position at the time of call - - // saved members of AVFormatContext - AVPacketList *packet_buffer; ///< packet buffer of original state - AVPacketList *parse_queue; ///< parse queue of original state - AVPacketList *raw_packet_buffer; ///< raw packet buffer of original state - int raw_packet_buffer_remaining_size; ///< remaining space in raw_packet_buffer - - // saved info for streams - int nb_streams; ///< number of streams with stored state - AVParserStreamState *stream_states; ///< states of individual streams (array) -} AVParserState; - -/** - * Search for the sync point of all active streams. - * - * This routine is not supposed to be called directly by a user application, - * but by demuxers. - * - * A sync point is defined as a point in stream, such that, when decoding start - * from this point, the decoded output of all streams synchronizes closest - * to the given timestamp ts. This routine also takes timestamp limits into account. - * Thus, the output will synchronize no sooner than ts_min and no later than ts_max. - * - * @param stream_index stream index for time base reference of timestamps - * @param pos approximate position where to start searching for key frames - * @param min_ts minimum allowed timestamp (position, if AVSEEK_FLAG_BYTE set) - * @param ts target timestamp (or position, if AVSEEK_FLAG_BYTE set in flags) - * @param max_ts maximum allowed timestamp (position, if AVSEEK_FLAG_BYTE set) - * @param flags if AVSEEK_FLAG_ANY is set, seek to any frame, otherwise only - * to a keyframe. If AVSEEK_FLAG_BYTE is set, search by - * position, not by timestamp. - * @return -1 if no such sync point could be found, otherwise stream position - * (stream is repositioned to this position) - */ -int64_t ff_gen_syncpoint_search(AVFormatContext *s, - int stream_index, - int64_t pos, - int64_t min_ts, - int64_t ts, - int64_t max_ts, - int flags); - -/** - * Store current parser state and file position. - * - * This function can be used by demuxers before a destructive seeking algorithm - * to store the parser state. Depending on the outcome of the seek, either the original - * state can be restored or the new state kept and the original state freed. - * - * @note As a side effect, the original parser state is reset, since structures - * are relinked to the stored state instead of being deeply-copied (for - * performance reasons and to keep the code simple). - * - * @param s context from which to save state - * @return parser state object or NULL if memory could not be allocated - */ -AVParserState *ff_store_parser_state(AVFormatContext *s); - -/** - * Restore previously saved parser state and file position. - * - * Saved state will be invalidated and freed by this call, since internal - * structures will be relinked back to the stored state instead of being - * deeply-copied. - * - * @param s context to which to restore state (same as used for storing state) - * @param state state to restore - */ -void ff_restore_parser_state(AVFormatContext *s, AVParserState *state); - -/** - * Free previously saved parser state. - * - * @param s context to which the state belongs (same as used for storing state) - * @param state state to free - */ -void ff_free_parser_state(AVFormatContext *s, AVParserState *state); - -#endif /* AVFORMAT_SEEK_H */ |