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Add session metadata for the video stream

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Introduce a new packet type, a "session" packet, containing metadata
about the encoding session. It is used only for the video stream and
currently includes the video resolution.

For illustration, here is a sequence of packets on the video stream:

                                        device rotation
                                        v
    CODEC | SESSION | MEDIA | MEDIA | … | SESSION | MEDIA | MEDIA | …
           1920x1080 <-----------------> 1080x1920 <------------------
                      encoding session 1            encoding session 2

This metadata is not strictly necessary, since the video resolution can
be determined after decoding. However, it allows detection of cases
where the encoder does not respect the requested size (and logs a
warning), even without decoding (e.g., when there is no video playback).

Additional metadata could be added later if necessary, for example the
actual device rotation.

Refs #5918 <https://github.com/Genymobile/scrcpy/pull/5918>
Refs #5894 <https://github.com/Genymobile/scrcpy/pull/5894>
PR #6159 <https://github.com/Genymobile/scrcpy/pull/6159>

Co-authored-by: gz0119 <liyong2@4399.com>
This commit is contained in:
Romain Vimont
2025-05-10 10:23:02 +02:00
parent 1015b42e53
commit 78cba1b7c2
15 changed files with 240 additions and 82 deletions
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5
app/src/delay_buffer.c
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@@ -109,7 +109,8 @@ stopped:
static bool
sc_delay_buffer_frame_sink_open(struct sc_frame_sink *sink,
const AVCodecContext *ctx) {
const AVCodecContext *ctx,
const struct sc_stream_session *session) {
struct sc_delay_buffer *db = DOWNCAST(sink);
(void) ctx;
@@ -132,7 +133,7 @@ sc_delay_buffer_frame_sink_open(struct sc_frame_sink *sink,
sc_vecdeque_init(&db->queue);
db->stopped = false;
if (!sc_frame_source_sinks_open(&db->frame_source, ctx)) {
if (!sc_frame_source_sinks_open(&db->frame_source, ctx, session)) {
goto error_destroy_wait_cond;
}