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109 lines
3.4 KiB
109 lines
3.4 KiB
/* |
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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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