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https://github.com/FFmpeg/FFmpeg.git
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587081a179
Same issues apply to it as to -shortest. Changes the results of the following tests: - matroska-flac-extradata-update The test reencodes two input FLAC streams into three output FLAC streams. The last output stream is limited to 8 frames. The current code results in the first two output streams having 12 frames, after this commit all three streams have 8 frames and are the same length. This new result is better, since it is predictable. - mkv-1242 The test streamcopies one video and one audio stream, video is limited to 11 frames. The new result shortens the audio stream so that it is not longer than the video.
110 lines
3.4 KiB
C
110 lines
3.4 KiB
C
/*
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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 FFTOOLS_SYNC_QUEUE_H
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#define FFTOOLS_SYNC_QUEUE_H
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#include <stdint.h>
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#include "libavcodec/packet.h"
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#include "libavutil/frame.h"
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enum SyncQueueType {
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SYNC_QUEUE_PACKETS,
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SYNC_QUEUE_FRAMES,
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};
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typedef union SyncQueueFrame {
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AVFrame *f;
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AVPacket *p;
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} SyncQueueFrame;
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#define SQFRAME(frame) ((SyncQueueFrame){ .f = (frame) })
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#define SQPKT(pkt) ((SyncQueueFrame){ .p = (pkt) })
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typedef struct SyncQueue SyncQueue;
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/**
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* Allocate a sync queue of the given type.
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*
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* @param buf_size_us maximum duration that will be buffered in microseconds
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*/
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SyncQueue *sq_alloc(enum SyncQueueType type, int64_t buf_size_us);
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void sq_free(SyncQueue **sq);
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/**
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* Add a new stream to the sync queue.
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*
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* @param limiting whether the stream is limiting, i.e. no other stream can be
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* longer than this one
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* @return
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* - a non-negative stream index on success
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* - a negative error code on error
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*/
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int sq_add_stream(SyncQueue *sq, int limiting);
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/**
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* Set the timebase for the stream with index stream_idx. Should be called
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* before sending any frames for this stream.
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*/
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void sq_set_tb(SyncQueue *sq, unsigned int stream_idx, AVRational tb);
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/**
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* Limit the number of output frames for stream with index stream_idx
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* to max_frames.
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*/
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void sq_limit_frames(SyncQueue *sq, unsigned int stream_idx,
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uint64_t max_frames);
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/**
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* Submit a frame for the stream with index stream_idx.
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*
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* On success, the sync queue takes ownership of the frame and will reset the
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* contents of the supplied frame. On failure, the frame remains owned by the
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* caller.
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*
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* Sending a frame with NULL contents marks the stream as finished.
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*
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* @return
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* - 0 on success
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* - AVERROR_EOF when no more frames should be submitted for this stream
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* - another a negative error code on failure
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*/
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int sq_send(SyncQueue *sq, unsigned int stream_idx, SyncQueueFrame frame);
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/**
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* Read a frame from the queue.
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*
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* @param stream_idx index of the stream to read a frame for. May be -1, then
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* try to read a frame from any stream that is ready for
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* output.
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* @param frame output frame will be written here on success. The frame is owned
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* by the caller.
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*
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* @return
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* - a non-negative index of the stream to which the returned frame belongs
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* - AVERROR(EAGAIN) when more frames need to be submitted to the queue
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* - AVERROR_EOF when no more frames will be available for this stream (for any
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* stream if stream_idx is -1)
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* - another negative error code on failure
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*/
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int sq_receive(SyncQueue *sq, int stream_idx, SyncQueueFrame frame);
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#endif // FFTOOLS_SYNC_QUEUE_H
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