examples/dmabuf-capture: move encoding to a separate thread
Drop new frames if too slow. Speeds up encoding significantly, even with vaapi.
This commit is contained in:
parent
e459fe0ec7
commit
5707653e85
|
@ -10,6 +10,8 @@
|
|||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <unistd.h>
|
||||
#include <pthread.h>
|
||||
#include <stdbool.h>
|
||||
#include <libdrm/drm_fourcc.h>
|
||||
#include "wlr-export-dmabuf-unstable-v1-client-protocol.h"
|
||||
|
||||
|
@ -24,6 +26,15 @@ struct wayland_output {
|
|||
AVRational framerate;
|
||||
};
|
||||
|
||||
struct fifo_buffer {
|
||||
AVFrame **queued_frames;
|
||||
int num_queued_frames;
|
||||
int max_queued_frames;
|
||||
pthread_mutex_t lock;
|
||||
pthread_cond_t cond;
|
||||
pthread_mutex_t cond_lock;
|
||||
};
|
||||
|
||||
struct capture_context {
|
||||
AVClass *class; /* For pretty logging */
|
||||
struct wl_display *display;
|
||||
|
@ -40,18 +51,20 @@ struct capture_context {
|
|||
|
||||
/* If something happens during capture */
|
||||
int err;
|
||||
int quit;
|
||||
bool quit;
|
||||
|
||||
/* FFmpeg specific parts */
|
||||
pthread_t vid_thread;
|
||||
AVFrame *current_frame;
|
||||
AVFormatContext *avf;
|
||||
AVCodecContext *avctx;
|
||||
AVBufferRef *drm_device_ref;
|
||||
AVBufferRef *drm_frames_ref;
|
||||
|
||||
AVBufferRef *mapped_device_ref;
|
||||
AVBufferRef *mapped_frames_ref;
|
||||
|
||||
AVFormatContext *avf;
|
||||
AVCodecContext *avctx;
|
||||
/* Sync stuff */
|
||||
struct fifo_buffer vid_frames;
|
||||
|
||||
int64_t start_pts;
|
||||
|
||||
|
@ -66,6 +79,69 @@ struct capture_context {
|
|||
float out_bitrate;
|
||||
};
|
||||
|
||||
static int init_fifo(struct fifo_buffer *buf, int max_queued_frames) {
|
||||
pthread_mutex_init(&buf->lock, NULL);
|
||||
pthread_cond_init(&buf->cond, NULL);
|
||||
pthread_mutex_init(&buf->cond_lock, NULL);
|
||||
buf->num_queued_frames = 0;
|
||||
buf->max_queued_frames = max_queued_frames;
|
||||
buf->queued_frames = av_mallocz(buf->max_queued_frames * sizeof(AVFrame));
|
||||
return !buf->queued_frames ? AVERROR(ENOMEM) : 0;
|
||||
}
|
||||
|
||||
static int get_fifo_size(struct fifo_buffer *buf) {
|
||||
pthread_mutex_lock(&buf->lock);
|
||||
int ret = buf->num_queued_frames;
|
||||
pthread_mutex_unlock(&buf->lock);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int push_to_fifo(struct fifo_buffer *buf, AVFrame *f) {
|
||||
int ret;
|
||||
pthread_mutex_lock(&buf->lock);
|
||||
if ((buf->num_queued_frames + 1) > buf->max_queued_frames) {
|
||||
av_frame_free(&f);
|
||||
ret = 1;
|
||||
} else {
|
||||
buf->queued_frames[buf->num_queued_frames++] = f;
|
||||
ret = 0;
|
||||
}
|
||||
pthread_mutex_unlock(&buf->lock);
|
||||
pthread_cond_signal(&buf->cond);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static AVFrame *pop_from_fifo(struct fifo_buffer *buf) {
|
||||
pthread_mutex_lock(&buf->lock);
|
||||
|
||||
if (!buf->num_queued_frames) {
|
||||
pthread_mutex_unlock(&buf->lock);
|
||||
pthread_cond_wait(&buf->cond, &buf->cond_lock);
|
||||
pthread_mutex_lock(&buf->lock);
|
||||
}
|
||||
|
||||
AVFrame *rf = buf->queued_frames[0];
|
||||
for (int i = 1; i < buf->num_queued_frames; i++) {
|
||||
buf->queued_frames[i - 1] = buf->queued_frames[i];
|
||||
}
|
||||
buf->num_queued_frames--;
|
||||
buf->queued_frames[buf->num_queued_frames] = NULL;
|
||||
|
||||
pthread_mutex_unlock(&buf->lock);
|
||||
return rf;
|
||||
}
|
||||
|
||||
static void free_fifo(struct fifo_buffer *buf) {
|
||||
pthread_mutex_lock(&buf->lock);
|
||||
if (buf->num_queued_frames) {
|
||||
for (int i = 0; i < buf->num_queued_frames; i++) {
|
||||
av_frame_free(&buf->queued_frames[i]);
|
||||
}
|
||||
}
|
||||
av_freep(&buf->queued_frames);
|
||||
pthread_mutex_unlock(&buf->lock);
|
||||
}
|
||||
|
||||
static void output_handle_geometry(void *data, struct wl_output *wl_output,
|
||||
int32_t x, int32_t y, int32_t phys_width, int32_t phys_height,
|
||||
int32_t subpixel, const char *make, const char *model,
|
||||
|
@ -300,6 +376,16 @@ static void frame_ready(void *data, struct zwlr_export_dmabuf_frame_v1 *frame,
|
|||
enum AVPixelFormat pix_fmt = drm_fmt_to_pixfmt(desc->layers[0].format);
|
||||
int err = 0;
|
||||
|
||||
/* Timestamp, nanoseconds timebase */
|
||||
f->pts = ((((uint64_t)tv_sec_hi) << 32) | tv_sec_lo) * 1000000000 + tv_nsec;
|
||||
|
||||
if (!ctx->start_pts) {
|
||||
ctx->start_pts = f->pts;
|
||||
}
|
||||
|
||||
f->pts = av_rescale_q(f->pts - ctx->start_pts, (AVRational){ 1, 1000000000 },
|
||||
ctx->avctx->time_base);
|
||||
|
||||
/* Attach the hardware frame context to the frame */
|
||||
err = attach_drm_frames_ref(ctx, f, pix_fmt);
|
||||
if (err) {
|
||||
|
@ -318,6 +404,7 @@ static void frame_ready(void *data, struct zwlr_export_dmabuf_frame_v1 *frame,
|
|||
AVHWFramesContext *mapped_hwfc;
|
||||
mapped_hwfc = (AVHWFramesContext *)ctx->mapped_frames_ref->data;
|
||||
mapped_frame->format = mapped_hwfc->format;
|
||||
mapped_frame->pts = f->pts;
|
||||
|
||||
/* Set frame hardware context referencce */
|
||||
mapped_frame->hw_frames_ctx = av_buffer_ref(ctx->mapped_frames_ref);
|
||||
|
@ -332,33 +419,68 @@ static void frame_ready(void *data, struct zwlr_export_dmabuf_frame_v1 *frame,
|
|||
goto end;
|
||||
}
|
||||
|
||||
AVFrame *enc_input = mapped_frame;
|
||||
|
||||
if (ctx->is_software_encoder) {
|
||||
AVFrame *soft_frame = av_frame_alloc();
|
||||
av_hwframe_transfer_data(soft_frame, mapped_frame, 0);
|
||||
av_frame_free(&mapped_frame);
|
||||
enc_input = soft_frame;
|
||||
if (push_to_fifo(&ctx->vid_frames, mapped_frame)) {
|
||||
av_log(ctx, AV_LOG_WARNING, "Dropped frame!\n");
|
||||
}
|
||||
|
||||
/* Nanoseconds */
|
||||
enc_input->pts = (((uint64_t)tv_sec_hi) << 32) | tv_sec_lo;
|
||||
enc_input->pts *= 1000000000;
|
||||
enc_input->pts += tv_nsec;
|
||||
|
||||
if (!ctx->start_pts) {
|
||||
ctx->start_pts = enc_input->pts;
|
||||
if (!ctx->quit && !ctx->err) {
|
||||
register_cb(ctx);
|
||||
}
|
||||
|
||||
enc_input->pts -= ctx->start_pts;
|
||||
end:
|
||||
ctx->err = err;
|
||||
av_frame_free(&ctx->current_frame);
|
||||
}
|
||||
|
||||
enc_input->pts = av_rescale_q(enc_input->pts, (AVRational){ 1, 1000000000 },
|
||||
ctx->avctx->time_base);
|
||||
static void frame_cancel(void *data, struct zwlr_export_dmabuf_frame_v1 *frame,
|
||||
uint32_t reason) {
|
||||
struct capture_context *ctx = data;
|
||||
av_log(ctx, AV_LOG_WARNING, "Frame cancelled!\n");
|
||||
av_frame_free(&ctx->current_frame);
|
||||
if (reason == ZWLR_EXPORT_DMABUF_FRAME_V1_CANCEL_REASON_PERMANENT) {
|
||||
av_log(ctx, AV_LOG_ERROR, "Permanent failure, exiting\n");
|
||||
ctx->err = true;
|
||||
} else {
|
||||
register_cb(ctx);
|
||||
}
|
||||
}
|
||||
|
||||
static const struct zwlr_export_dmabuf_frame_v1_listener frame_listener = {
|
||||
.frame = frame_start,
|
||||
.object = frame_object,
|
||||
.ready = frame_ready,
|
||||
.cancel = frame_cancel,
|
||||
};
|
||||
|
||||
static void register_cb(struct capture_context *ctx) {
|
||||
ctx->frame_callback = zwlr_export_dmabuf_manager_v1_capture_output(
|
||||
ctx->export_manager, 0, ctx->target_output);
|
||||
|
||||
zwlr_export_dmabuf_frame_v1_add_listener(ctx->frame_callback,
|
||||
&frame_listener, ctx);
|
||||
}
|
||||
|
||||
void *vid_encode_thread(void *arg) {
|
||||
int err = 0;
|
||||
struct capture_context *ctx = arg;
|
||||
|
||||
do {
|
||||
err = avcodec_send_frame(ctx->avctx, enc_input);
|
||||
AVFrame *f = NULL;
|
||||
if (get_fifo_size(&ctx->vid_frames) || !ctx->quit) {
|
||||
f = pop_from_fifo(&ctx->vid_frames);
|
||||
}
|
||||
|
||||
av_frame_free(&enc_input);
|
||||
if (ctx->is_software_encoder && f) {
|
||||
AVFrame *soft_frame = av_frame_alloc();
|
||||
av_hwframe_transfer_data(soft_frame, f, 0);
|
||||
soft_frame->pts = f->pts;
|
||||
av_frame_free(&f);
|
||||
f = soft_frame;
|
||||
}
|
||||
|
||||
err = avcodec_send_frame(ctx->avctx, f);
|
||||
|
||||
av_frame_free(&f);
|
||||
|
||||
if (err) {
|
||||
av_log(ctx, AV_LOG_ERROR, "Error encoding: %s!\n", av_err2str(err));
|
||||
|
@ -374,7 +496,6 @@ static void frame_ready(void *data, struct zwlr_export_dmabuf_frame_v1 *frame,
|
|||
break;
|
||||
} else if (ret == AVERROR_EOF) {
|
||||
av_log(ctx, AV_LOG_INFO, "Encoder flushed!\n");
|
||||
ctx->quit = 2;
|
||||
goto end;
|
||||
} else if (ret) {
|
||||
av_log(ctx, AV_LOG_ERROR, "Error encoding: %s!\n",
|
||||
|
@ -394,43 +515,17 @@ static void frame_ready(void *data, struct zwlr_export_dmabuf_frame_v1 *frame,
|
|||
goto end;
|
||||
}
|
||||
};
|
||||
} while (ctx->quit);
|
||||
|
||||
av_log(NULL, AV_LOG_INFO, "Encoded frame %i!\n", ctx->avctx->frame_number);
|
||||
av_log(ctx, AV_LOG_INFO, "Encoded frame %i (%i in queue)\n",
|
||||
ctx->avctx->frame_number, get_fifo_size(&ctx->vid_frames));
|
||||
|
||||
register_cb(ctx);
|
||||
} while (!ctx->err);
|
||||
|
||||
end:
|
||||
if (!ctx->err) {
|
||||
ctx->err = err;
|
||||
av_frame_free(&ctx->current_frame);
|
||||
}
|
||||
|
||||
static void frame_cancel(void *data, struct zwlr_export_dmabuf_frame_v1 *frame,
|
||||
uint32_t reason) {
|
||||
struct capture_context *ctx = data;
|
||||
av_log(ctx, AV_LOG_WARNING, "Frame cancelled!\n");
|
||||
av_frame_free(&ctx->current_frame);
|
||||
if (reason == ZWLR_EXPORT_DMABUF_FRAME_V1_CANCEL_REASON_PERMANENT) {
|
||||
av_log(ctx, AV_LOG_ERROR, "Permanent failure, exiting\n");
|
||||
ctx->err = 1;
|
||||
} else {
|
||||
register_cb(ctx);
|
||||
}
|
||||
}
|
||||
|
||||
static const struct zwlr_export_dmabuf_frame_v1_listener frame_listener = {
|
||||
.frame = frame_start,
|
||||
.object = frame_object,
|
||||
.ready = frame_ready,
|
||||
.cancel = frame_cancel,
|
||||
};
|
||||
|
||||
static void register_cb(struct capture_context *ctx) {
|
||||
ctx->frame_callback = zwlr_export_dmabuf_manager_v1_capture_output(
|
||||
ctx->export_manager, 0, ctx->target_output);
|
||||
|
||||
zwlr_export_dmabuf_frame_v1_add_listener(ctx->frame_callback,
|
||||
&frame_listener, ctx);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static int init_lavu_hwcontext(struct capture_context *ctx) {
|
||||
|
@ -592,7 +687,8 @@ struct capture_context *q_ctx = NULL;
|
|||
|
||||
void on_quit_signal(int signo) {
|
||||
printf("\r");
|
||||
q_ctx->quit = 1;
|
||||
av_log(q_ctx, AV_LOG_WARNING, "Quitting!\n");
|
||||
q_ctx->quit = true;
|
||||
}
|
||||
|
||||
static int main_loop(struct capture_context *ctx) {
|
||||
|
@ -615,13 +711,21 @@ static int main_loop(struct capture_context *ctx) {
|
|||
return err;
|
||||
}
|
||||
|
||||
/* Start video encoding thread */
|
||||
err = init_fifo(&ctx->vid_frames, 16);
|
||||
if (err) {
|
||||
return err;
|
||||
}
|
||||
pthread_create(&ctx->vid_thread, NULL, vid_encode_thread, ctx);
|
||||
|
||||
/* Start the frame callback */
|
||||
register_cb(ctx);
|
||||
|
||||
while (wl_display_dispatch(ctx->display) != -1 && !ctx->err &&
|
||||
ctx->quit < 2) {
|
||||
// This space intentionally left blank
|
||||
}
|
||||
/* Run capture */
|
||||
while (wl_display_dispatch(ctx->display) != -1 && !ctx->err && !ctx->quit);
|
||||
|
||||
/* Join with encoder thread */
|
||||
pthread_join(ctx->vid_thread, NULL);
|
||||
|
||||
err = av_write_trailer(ctx->avf);
|
||||
if (err) {
|
||||
|
@ -728,6 +832,8 @@ static void uninit(struct capture_context *ctx) {
|
|||
zwlr_export_dmabuf_manager_v1_destroy(ctx->export_manager);
|
||||
}
|
||||
|
||||
free_fifo(&ctx->vid_frames);
|
||||
|
||||
av_buffer_unref(&ctx->drm_frames_ref);
|
||||
av_buffer_unref(&ctx->drm_device_ref);
|
||||
av_buffer_unref(&ctx->mapped_frames_ref);
|
||||
|
|
|
@ -47,6 +47,7 @@ if libavutil.found() and libavcodec.found() and libavformat.found()
|
|||
executable(
|
||||
'dmabuf-capture',
|
||||
'dmabuf-capture.c',
|
||||
dependencies: [wayland_client, wlr_protos, libavutil, libavcodec, libavformat, wlroots]
|
||||
dependencies: [wayland_client, wlr_protos, libavutil, libavcodec,
|
||||
libavformat, wlroots, threads ]
|
||||
)
|
||||
endif
|
||||
|
|
Loading…
Reference in New Issue