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screencast: pipewire add functions to dequeue and enqueue a buffer

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This commit is contained in:
columbarius 2021-05-27 18:27:03 +02:00
parent 7c0f352560
commit 4b03a5acfd
3 changed files with 56 additions and 0 deletions
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2
include/pipewire_screencast.h
View file

@ -6,6 +6,8 @@
#define XDPW_PWR_BUFFERS 1
#define XDPW_PWR_ALIGN 16
void xdpw_pwr_dequeue_buffer(struct xdpw_screencast_instance *cast);
void xdpw_pwr_enqueue_buffer(struct xdpw_screencast_instance *cast);
void pwr_update_stream_param(struct xdpw_screencast_instance *cast);
void xdpw_pwr_stream_create(struct xdpw_screencast_instance *cast);
void xdpw_pwr_stream_destroy(struct xdpw_screencast_instance *cast);

1
include/screencast_common.h
View file

@ -93,6 +93,7 @@ struct xdpw_screencast_instance {
uint32_t node_id;
bool pwr_stream_state;
uint32_t framerate;
struct pw_buffer *current_pw_buffer;
// wlroots
struct zwlr_screencopy_frame_v1 *frame_callback;

53
src/screencast/pipewire_screencast.c
View file

@ -7,6 +7,7 @@
#include <spa/param/video/format-utils.h>
#include <sys/mman.h>
#include <unistd.h>
#include <assert.h>
#include "wlr_screencast.h"
#include "xdpw.h"
@ -231,6 +232,58 @@ static const struct pw_stream_events pwr_stream_events = {
.remove_buffer = pwr_handle_stream_remove_buffer,
};
void xdpw_pwr_dequeue_buffer(struct xdpw_screencast_instance *cast) {
logprint(TRACE, "pipewire: dequeueing buffer");
assert(cast->current_pw_buffer == NULL);
if ((cast->current_pw_buffer = pw_stream_dequeue_buffer(cast->stream)) == NULL) {
logprint(WARN, "pipewire: out of buffers");
return;
}
}
void xdpw_pwr_enqueue_buffer(struct xdpw_screencast_instance *cast) {
logprint(TRACE, "pipewire: exporting buffer");
struct pw_buffer *pw_buf = cast->current_pw_buffer;
if (!pw_buf) {
logprint(TRACE, "pipewire: no pipewire buffer to queue");
return;
}
struct spa_buffer *spa_buf = pw_buf->buffer;
struct spa_data *d = spa_buf->datas;
struct spa_meta_header *h;
if ((h = spa_buffer_find_meta_data(spa_buf, SPA_META_Header, sizeof(*h)))) {
h->pts = -1;
h->flags = 0;
h->seq = cast->seq++;
h->dts_offset = 0;
}
if (d[0].data == NULL) {
logprint(TRACE, "pipewire: data pointer undefined");
goto queue;
}
writeFrameData(d[0].data, cast->simple_frame.data, cast->simple_frame.height,
cast->simple_frame.stride, cast->simple_frame.y_invert);
logprint(TRACE, "********************");
logprint(TRACE, "pipewire: pointer %p", d[0].data);
logprint(TRACE, "pipewire: size %d", d[0].maxsize);
logprint(TRACE, "pipewire: stride %d", d[0].chunk->stride);
logprint(TRACE, "pipewire: width %d", cast->simple_frame.width);
logprint(TRACE, "pipewire: height %d", cast->simple_frame.height);
logprint(TRACE, "pipewire: y_invert %d", cast->simple_frame.y_invert);
logprint(TRACE, "********************");
queue:
pw_stream_queue_buffer(cast->stream, pw_buf);
cast->current_pw_buffer = NULL;
}
void pwr_update_stream_param(struct xdpw_screencast_instance *cast) {
logprint(TRACE, "pipewire: stream update parameters");
struct pw_stream *stream = cast->stream;