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weston/libweston/screenshooter.c

518 lines
13 KiB

/*
* Copyright © 2008-2011 Kristian Høgsberg
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include "config.h"
#include <stdlib.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <linux/input.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include <sys/uio.h>
#include <libweston/libweston.h>
#include "shared/helpers.h"
#include "shared/timespec-util.h"
#include "backend.h"
#include "libweston-internal.h"
#include "pixel-formats.h"
#include "wcap/wcap-decode.h"
struct screenshooter_frame_listener {
struct wl_listener frame_listener;
struct wl_listener buffer_destroy_listener;
struct weston_buffer *buffer;
struct weston_output *output;
weston_screenshooter_done_func_t done;
void *data;
};
static void
copy_bgra_yflip(uint8_t *dst, uint8_t *src, int height, int stride)
{
uint8_t *end;
end = dst + height * stride;
while (dst < end) {
memcpy(dst, src, stride);
dst += stride;
src -= stride;
}
}
static void
copy_bgra(uint8_t *dst, uint8_t *src, int height, int stride)
{
/* TODO: optimize this out */
memcpy(dst, src, height * stride);
}
static void
copy_row_swap_RB(void *vdst, void *vsrc, int bytes)
{
uint32_t *dst = vdst;
uint32_t *src = vsrc;
uint32_t *end = dst + bytes / 4;
while (dst < end) {
uint32_t v = *src++;
/* A R G B */
uint32_t tmp = v & 0xff00ff00;
tmp |= (v >> 16) & 0x000000ff;
tmp |= (v << 16) & 0x00ff0000;
*dst++ = tmp;
}
}
static void
copy_rgba_yflip(uint8_t *dst, uint8_t *src, int height, int stride)
{
uint8_t *end;
end = dst + height * stride;
while (dst < end) {
copy_row_swap_RB(dst, src, stride);
dst += stride;
src -= stride;
}
}
static void
copy_rgba(uint8_t *dst, uint8_t *src, int height, int stride)
{
uint8_t *end;
end = dst + height * stride;
while (dst < end) {
copy_row_swap_RB(dst, src, stride);
dst += stride;
src += stride;
}
}
static void
screenshooter_frame_notify(struct wl_listener *listener, void *data)
{
struct screenshooter_frame_listener *l =
container_of(listener,
struct screenshooter_frame_listener,
frame_listener);
struct weston_output *output = l->output;
struct weston_compositor *compositor = output->compositor;
const pixman_format_code_t pixman_format =
compositor->read_format->pixman_format;
int32_t stride;
uint8_t *pixels, *d, *s;
weston_output_disable_planes_decr(output);
wl_list_remove(&listener->link);
wl_list_remove(&l->buffer_destroy_listener.link);
stride = l->buffer->width * (PIXMAN_FORMAT_BPP(pixman_format) / 8);
pixels = malloc(stride * l->buffer->height);
if (pixels == NULL) {
l->done(l->data, WESTON_SCREENSHOOTER_NO_MEMORY);
free(l);
return;
}
compositor->renderer->read_pixels(output,
compositor->read_format, pixels,
0, 0, output->current_mode->width,
output->current_mode->height);
stride = wl_shm_buffer_get_stride(l->buffer->shm_buffer);
d = wl_shm_buffer_get_data(l->buffer->shm_buffer);
s = pixels + stride * (l->buffer->height - 1);
wl_shm_buffer_begin_access(l->buffer->shm_buffer);
switch (pixman_format) {
case PIXMAN_a8r8g8b8:
case PIXMAN_x8r8g8b8:
if (compositor->capabilities & WESTON_CAP_CAPTURE_YFLIP)
copy_bgra_yflip(d, s, output->current_mode->height, stride);
else
copy_bgra(d, pixels, output->current_mode->height, stride);
break;
case PIXMAN_x8b8g8r8:
case PIXMAN_a8b8g8r8:
if (compositor->capabilities & WESTON_CAP_CAPTURE_YFLIP)
copy_rgba_yflip(d, s, output->current_mode->height, stride);
else
copy_rgba(d, pixels, output->current_mode->height, stride);
break;
default:
break;
}
wl_shm_buffer_end_access(l->buffer->shm_buffer);
l->done(l->data, WESTON_SCREENSHOOTER_SUCCESS);
free(pixels);
free(l);
}
static void
buffer_destroy_handle(struct wl_listener *listener, void *data)
{
struct screenshooter_frame_listener *l =
container_of(listener,
struct screenshooter_frame_listener,
buffer_destroy_listener);
weston_output_disable_planes_decr(l->output);
wl_list_remove(&listener->link);
wl_list_remove(&l->frame_listener.link);
l->done(l->data, WESTON_SCREENSHOOTER_BAD_BUFFER);
free(l);
}
WL_EXPORT int
weston_screenshooter_shoot(struct weston_output *output,
struct weston_buffer *buffer,
weston_screenshooter_done_func_t done, void *data)
{
struct screenshooter_frame_listener *l;
if (buffer->type != WESTON_BUFFER_SHM) {
done(data, WESTON_SCREENSHOOTER_BAD_BUFFER);
return -1;
}
if (buffer->width < output->current_mode->width ||
buffer->height < output->current_mode->height) {
done(data, WESTON_SCREENSHOOTER_BAD_BUFFER);
return -1;
}
l = malloc(sizeof *l);
if (l == NULL) {
done(data, WESTON_SCREENSHOOTER_NO_MEMORY);
return -1;
}
l->buffer = buffer;
l->output = output;
l->done = done;
l->data = data;
l->frame_listener.notify = screenshooter_frame_notify;
wl_signal_add(&output->frame_signal, &l->frame_listener);
l->buffer_destroy_listener.notify = buffer_destroy_handle;
wl_signal_add(&buffer->destroy_signal, &l->buffer_destroy_listener);
weston_output_disable_planes_incr(output);
weston_output_schedule_repaint(output);
return 0;
}
struct weston_recorder {
struct weston_output *output;
uint32_t *frame, *rect;
uint32_t *tmpbuf;
uint32_t total;
int fd;
struct wl_listener frame_listener;
int count, destroying;
};
static uint32_t *
output_run(uint32_t *p, uint32_t delta, int run)
{
int i;
while (run > 0) {
if (run <= 0xe0) {
*p++ = delta | ((run - 1) << 24);
break;
}
i = 24 - __builtin_clz(run);
*p++ = delta | ((i + 0xe0) << 24);
run -= 1 << (7 + i);
}
return p;
}
static uint32_t
component_delta(uint32_t next, uint32_t prev)
{
unsigned char dr, dg, db;
dr = (next >> 16) - (prev >> 16);
dg = (next >> 8) - (prev >> 8);
db = (next >> 0) - (prev >> 0);
return (dr << 16) | (dg << 8) | (db << 0);
}
static void
weston_recorder_destroy(struct weston_recorder *recorder);
static void
weston_recorder_frame_notify(struct wl_listener *listener, void *data)
{
struct weston_recorder *recorder =
container_of(listener, struct weston_recorder, frame_listener);
struct weston_output *output = recorder->output;
struct weston_compositor *compositor = output->compositor;
uint32_t msecs = timespec_to_msec(&output->frame_time);
pixman_box32_t *r;
pixman_region32_t damage, transformed_damage;
int i, j, k, n, width, height, run, stride;
uint32_t delta, prev, *d, *s, *p, next;
struct {
uint32_t msecs;
uint32_t nrects;
} header;
struct iovec v[2];
int do_yflip;
int y_orig;
uint32_t *outbuf;
do_yflip = !!(compositor->capabilities & WESTON_CAP_CAPTURE_YFLIP);
if (do_yflip)
outbuf = recorder->rect;
else
outbuf = recorder->tmpbuf;
pixman_region32_init(&damage);
pixman_region32_init(&transformed_damage);
pixman_region32_intersect(&damage, &output->region, data);
pixman_region32_translate(&damage, -output->x, -output->y);
weston_transformed_region(output->width, output->height,
output->transform, output->current_scale,
&damage, &transformed_damage);
pixman_region32_fini(&damage);
r = pixman_region32_rectangles(&transformed_damage, &n);
if (n == 0) {
pixman_region32_fini(&transformed_damage);
return;
}
header.msecs = msecs;
header.nrects = n;
v[0].iov_base = &header;
v[0].iov_len = sizeof header;
v[1].iov_base = r;
v[1].iov_len = n * sizeof *r;
recorder->total += writev(recorder->fd, v, 2);
stride = output->current_mode->width;
for (i = 0; i < n; i++) {
width = r[i].x2 - r[i].x1;
height = r[i].y2 - r[i].y1;
if (do_yflip)
y_orig = output->current_mode->height - r[i].y2;
else
y_orig = r[i].y1;
compositor->renderer->read_pixels(output,
compositor->read_format, recorder->rect,
r[i].x1, y_orig, width, height);
p = outbuf;
run = prev = 0; /* quiet gcc */
for (j = 0; j < height; j++) {
if (do_yflip)
s = recorder->rect + width * j;
else
s = recorder->rect + width * (height - j - 1);
y_orig = r[i].y2 - j - 1;
d = recorder->frame + stride * y_orig + r[i].x1;
for (k = 0; k < width; k++) {
next = *s++;
delta = component_delta(next, *d);
*d++ = next;
if (run == 0 || delta == prev) {
run++;
} else {
p = output_run(p, prev, run);
run = 1;
}
prev = delta;
}
}
p = output_run(p, prev, run);
recorder->total += write(recorder->fd,
outbuf, (p - outbuf) * 4);
#if 0
fprintf(stderr,
"%dx%d at %d,%d rle from %d to %d bytes (%f) total %dM\n",
width, height, r[i].x1, r[i].y1,
width * height * 4, (int) (p - outbuf) * 4,
(float) (p - outbuf) / (width * height),
recorder->total / 1024 / 1024);
#endif
}
pixman_region32_fini(&transformed_damage);
recorder->count++;
if (recorder->destroying)
weston_recorder_destroy(recorder);
}
static void
weston_recorder_free(struct weston_recorder *recorder)
{
if (recorder == NULL)
return;
free(recorder->tmpbuf);
free(recorder->rect);
free(recorder->frame);
free(recorder);
}
static struct weston_recorder *
weston_recorder_create(struct weston_output *output, const char *filename)
{
struct weston_compositor *compositor = output->compositor;
struct weston_recorder *recorder;
int stride, size;
struct { uint32_t magic, format, width, height; } header;
int do_yflip;
do_yflip = !!(compositor->capabilities & WESTON_CAP_CAPTURE_YFLIP);
recorder = zalloc(sizeof *recorder);
if (recorder == NULL) {
weston_log("%s: out of memory\n", __func__);
return NULL;
}
stride = output->current_mode->width;
size = stride * 4 * output->current_mode->height;
recorder->frame = zalloc(size);
recorder->rect = malloc(size);
recorder->output = output;
if ((recorder->frame == NULL) || (recorder->rect == NULL)) {
weston_log("%s: out of memory\n", __func__);
goto err_recorder;
}
if (!do_yflip) {
recorder->tmpbuf = malloc(size);
if (recorder->tmpbuf == NULL) {
weston_log("%s: out of memory\n", __func__);
goto err_recorder;
}
}
header.magic = WCAP_HEADER_MAGIC;
switch (compositor->read_format->pixman_format) {
case PIXMAN_x8r8g8b8:
case PIXMAN_a8r8g8b8:
header.format = WCAP_FORMAT_XRGB8888;
break;
case PIXMAN_a8b8g8r8:
header.format = WCAP_FORMAT_XBGR8888;
break;
default:
weston_log("unknown recorder format\n");
goto err_recorder;
}
recorder->fd = open(filename,
O_WRONLY | O_CREAT | O_TRUNC | O_CLOEXEC, 0644);
if (recorder->fd < 0) {
weston_log("problem opening output file %s: %s\n", filename,
strerror(errno));
goto err_recorder;
}
header.width = output->current_mode->width;
header.height = output->current_mode->height;
recorder->total += write(recorder->fd, &header, sizeof header);
recorder->frame_listener.notify = weston_recorder_frame_notify;
wl_signal_add(&output->frame_signal, &recorder->frame_listener);
weston_output_disable_planes_incr(output);
weston_output_damage(output);
return recorder;
err_recorder:
weston_recorder_free(recorder);
return NULL;
}
static void
weston_recorder_destroy(struct weston_recorder *recorder)
{
wl_list_remove(&recorder->frame_listener.link);
close(recorder->fd);
weston_output_disable_planes_decr(recorder->output);
weston_recorder_free(recorder);
}
WL_EXPORT struct weston_recorder *
weston_recorder_start(struct weston_output *output, const char *filename)
{
struct wl_listener *listener;
listener = wl_signal_get(&output->frame_signal,
weston_recorder_frame_notify);
if (listener) {
weston_log("a recorder on output %s is already running\n",
output->name);
return NULL;
}
weston_log("starting recorder for output %s, file %s\n",
output->name, filename);
return weston_recorder_create(output, filename);
}
WL_EXPORT void
weston_recorder_stop(struct weston_recorder *recorder)
{
weston_log("stopping recorder, total file size %dM, %d frames\n",
recorder->total / (1024 * 1024), recorder->count);
recorder->destroying = 1;
weston_output_schedule_repaint(recorder->output);
}