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Use delay buffer as a frame source/sink

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The components needing delayed frames (sc_screen and sc_v4l2_sink)
managed a sc_video_buffer instance, which itself embedded a
sc_frame_buffer instance (to keep only the most recent frame).

In theory, these components should not be aware of delaying: they should
just receive AVFrames later, and only handle a sc_frame_buffer.

Therefore, refactor sc_delay_buffer as a frame source (it consumes)
frames) and a frame sink (it produces frames, after some delay), and
plug an instance in the pipeline only when a delay is requested.

This also removes the need for a specific sc_video_buffer.

PR #3757 <https://github.com/Genymobile/scrcpy/pull/3757>
This commit is contained in:
Romain Vimont
2023-03-02 21:30:24 +01:00
parent 2dae48bc13
commit a5ebd16d5c
11 changed files with 150 additions and 320 deletions
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7
app/src/v4l2_sink.h
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@@ -8,19 +8,18 @@
#include "coords.h"
#include "trait/frame_sink.h"
#include "video_buffer.h"
#include "frame_buffer.h"
#include "util/tick.h"
struct sc_v4l2_sink {
struct sc_frame_sink frame_sink; // frame sink trait
struct sc_video_buffer vb;
struct sc_frame_buffer fb;
AVFormatContext *format_ctx;
AVCodecContext *encoder_ctx;
char *device_name;
struct sc_size frame_size;
sc_tick buffering_time;
sc_thread thread;
sc_mutex mutex;
@@ -35,7 +34,7 @@ struct sc_v4l2_sink {
bool
sc_v4l2_sink_init(struct sc_v4l2_sink *vs, const char *device_name,
struct sc_size frame_size, sc_tick buffering_time);
struct sc_size frame_size);
void
sc_v4l2_sink_destroy(struct sc_v4l2_sink *vs);