e6e011baaf
The decoder initially read from the socket, decoded the video and sent
the decoded frames to the screen:
+---------+ +----------+
socket ---> | decoder | ---> | screen |
+---------+ +----------+
The design was simple, but the decoder had several responsabilities.
Then we added the recording feature, so we added a recorder, which
reused the packets received from the socket managed by the decoder:
+----------+
---> | screen |
+---------+ / +----------+
socket ---> | decoder | ----
+---------+ \ +----------+
---> | recorder |
+----------+
This lack of separation of concerns now have concrete implications: we
could not (properly) disable the decoder/display to only record the
video.
Therefore, split the decoder to extract the stream:
+----------+ +----------+
---> | decoder | ---> | screen |
+---------+ / +----------+ +----------+
socket ---> | stream | ----
+---------+ \ +----------+
---> | recorder |
+----------+
This will allow to record the stream without decoding the video.
36 lines
858 B
C
36 lines
858 B
C
#ifndef STREAM_H
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#define STREAM_H
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#include <SDL2/SDL_stdinc.h>
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#include <SDL2/SDL_thread.h>
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#include "net.h"
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struct video_buffer;
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struct frame_meta {
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Uint64 pts;
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struct frame_meta *next;
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};
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struct stream {
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socket_t socket;
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struct video_buffer *video_buffer;
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SDL_Thread *thread;
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struct decoder *decoder;
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struct recorder *recorder;
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struct receiver_state {
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// meta (in order) for frames not consumed yet
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struct frame_meta *frame_meta_queue;
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size_t remaining; // remaining bytes to receive for the current frame
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} receiver_state;
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};
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void stream_init(struct stream *stream, socket_t socket,
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struct decoder *decoder, struct recorder *recorder);
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SDL_bool stream_start(struct stream *stream);
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void stream_stop(struct stream *stream);
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void stream_join(struct stream *stream);
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#endif
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