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obs-studio/libobs/obs-video.c
jp9000 d49833830c libobs: Add ability to use scale filters on scene items
Allows the ability to use scale filters such as point, bicubic, lanczos
on specific scene items, disabled by default.  When using one of the
latter two options, if the item's scale is under half of the source's
original size, it uses the bilinear low resolution downscale shader
instead.
2016-06-29 08:00:54 -07:00

611 lines
17 KiB
C

/******************************************************************************
Copyright (C) 2013-2014 by Hugh Bailey <obs.jim@gmail.com>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
******************************************************************************/
#include "obs.h"
#include "obs-internal.h"
#include "graphics/vec4.h"
#include "media-io/format-conversion.h"
#include "media-io/video-frame.h"
static uint64_t tick_sources(uint64_t cur_time, uint64_t last_time)
{
struct obs_core_data *data = &obs->data;
struct obs_source *source;
uint64_t delta_time;
float seconds;
if (!last_time)
last_time = cur_time -
video_output_get_frame_time(obs->video.video);
delta_time = cur_time - last_time;
seconds = (float)((double)delta_time / 1000000000.0);
pthread_mutex_lock(&data->sources_mutex);
/* call the tick function of each source */
source = data->first_source;
while (source) {
obs_source_video_tick(source, seconds);
source = (struct obs_source*)source->context.next;
}
pthread_mutex_unlock(&data->sources_mutex);
return cur_time;
}
/* in obs-display.c */
extern void render_display(struct obs_display *display);
static inline void render_displays(void)
{
struct obs_display *display;
if (!obs->data.valid)
return;
gs_enter_context(obs->video.graphics);
/* render extra displays/swaps */
pthread_mutex_lock(&obs->data.displays_mutex);
display = obs->data.first_display;
while (display) {
render_display(display);
display = display->next;
}
pthread_mutex_unlock(&obs->data.displays_mutex);
gs_leave_context();
}
static inline void set_render_size(uint32_t width, uint32_t height)
{
gs_enable_depth_test(false);
gs_set_cull_mode(GS_NEITHER);
gs_ortho(0.0f, (float)width, 0.0f, (float)height, -100.0f, 100.0f);
gs_set_viewport(0, 0, width, height);
}
static inline void unmap_last_surface(struct obs_core_video *video)
{
if (video->mapped_surface) {
gs_stagesurface_unmap(video->mapped_surface);
video->mapped_surface = NULL;
}
}
static const char *render_main_texture_name = "render_main_texture";
static inline void render_main_texture(struct obs_core_video *video,
int cur_texture)
{
profile_start(render_main_texture_name);
struct vec4 clear_color;
vec4_set(&clear_color, 0.0f, 0.0f, 0.0f, 1.0f);
gs_set_render_target(video->render_textures[cur_texture], NULL);
gs_clear(GS_CLEAR_COLOR, &clear_color, 1.0f, 0);
set_render_size(video->base_width, video->base_height);
obs_view_render(&obs->data.main_view);
video->textures_rendered[cur_texture] = true;
profile_end(render_main_texture_name);
}
static inline gs_effect_t *get_scale_effect_internal(
struct obs_core_video *video)
{
/* if the dimension is under half the size of the original image,
* bicubic/lanczos can't sample enough pixels to create an accurate
* image, so use the bilinear low resolution effect instead */
if (video->output_width < (video->base_width / 2) &&
video->output_height < (video->base_height / 2)) {
return video->bilinear_lowres_effect;
}
switch (video->scale_type) {
case OBS_SCALE_BILINEAR: return video->default_effect;
case OBS_SCALE_LANCZOS: return video->lanczos_effect;
case OBS_SCALE_BICUBIC:
default:;
}
return video->bicubic_effect;
}
static inline bool resolution_close(struct obs_core_video *video,
uint32_t width, uint32_t height)
{
long width_cmp = (long)video->base_width - (long)width;
long height_cmp = (long)video->base_height - (long)height;
return labs(width_cmp) <= 16 && labs(height_cmp) <= 16;
}
static inline gs_effect_t *get_scale_effect(struct obs_core_video *video,
uint32_t width, uint32_t height)
{
if (resolution_close(video, width, height)) {
return video->default_effect;
} else {
/* if the scale method couldn't be loaded, use either bicubic
* or bilinear by default */
gs_effect_t *effect = get_scale_effect_internal(video);
if (!effect)
effect = !!video->bicubic_effect ?
video->bicubic_effect :
video->default_effect;
return effect;
}
}
static const char *render_output_texture_name = "render_output_texture";
static inline void render_output_texture(struct obs_core_video *video,
int cur_texture, int prev_texture)
{
profile_start(render_output_texture_name);
gs_texture_t *texture = video->render_textures[prev_texture];
gs_texture_t *target = video->output_textures[cur_texture];
uint32_t width = gs_texture_get_width(target);
uint32_t height = gs_texture_get_height(target);
struct vec2 base_i;
vec2_set(&base_i,
1.0f / (float)video->base_width,
1.0f / (float)video->base_height);
gs_effect_t *effect = get_scale_effect(video, width, height);
gs_technique_t *tech = gs_effect_get_technique(effect, "DrawMatrix");
gs_eparam_t *image = gs_effect_get_param_by_name(effect, "image");
gs_eparam_t *matrix = gs_effect_get_param_by_name(effect,
"color_matrix");
gs_eparam_t *bres_i = gs_effect_get_param_by_name(effect,
"base_dimension_i");
size_t passes, i;
if (!video->textures_rendered[prev_texture])
goto end;
gs_set_render_target(target, NULL);
set_render_size(width, height);
if (bres_i)
gs_effect_set_vec2(bres_i, &base_i);
gs_effect_set_val(matrix, video->color_matrix, sizeof(float) * 16);
gs_effect_set_texture(image, texture);
gs_enable_blending(false);
passes = gs_technique_begin(tech);
for (i = 0; i < passes; i++) {
gs_technique_begin_pass(tech, i);
gs_draw_sprite(texture, 0, width, height);
gs_technique_end_pass(tech);
}
gs_technique_end(tech);
gs_enable_blending(true);
video->textures_output[cur_texture] = true;
end:
profile_end(render_output_texture_name);
}
static inline void set_eparam(gs_effect_t *effect, const char *name, float val)
{
gs_eparam_t *param = gs_effect_get_param_by_name(effect, name);
gs_effect_set_float(param, val);
}
static const char *render_convert_texture_name = "render_convert_texture";
static void render_convert_texture(struct obs_core_video *video,
int cur_texture, int prev_texture)
{
profile_start(render_convert_texture_name);
gs_texture_t *texture = video->output_textures[prev_texture];
gs_texture_t *target = video->convert_textures[cur_texture];
float fwidth = (float)video->output_width;
float fheight = (float)video->output_height;
size_t passes, i;
gs_effect_t *effect = video->conversion_effect;
gs_eparam_t *image = gs_effect_get_param_by_name(effect, "image");
gs_technique_t *tech = gs_effect_get_technique(effect,
video->conversion_tech);
if (!video->textures_output[prev_texture])
goto end;
set_eparam(effect, "u_plane_offset", (float)video->plane_offsets[1]);
set_eparam(effect, "v_plane_offset", (float)video->plane_offsets[2]);
set_eparam(effect, "width", fwidth);
set_eparam(effect, "height", fheight);
set_eparam(effect, "width_i", 1.0f / fwidth);
set_eparam(effect, "height_i", 1.0f / fheight);
set_eparam(effect, "width_d2", fwidth * 0.5f);
set_eparam(effect, "height_d2", fheight * 0.5f);
set_eparam(effect, "width_d2_i", 1.0f / (fwidth * 0.5f));
set_eparam(effect, "height_d2_i", 1.0f / (fheight * 0.5f));
set_eparam(effect, "input_height", (float)video->conversion_height);
gs_effect_set_texture(image, texture);
gs_set_render_target(target, NULL);
set_render_size(video->output_width, video->conversion_height);
gs_enable_blending(false);
passes = gs_technique_begin(tech);
for (i = 0; i < passes; i++) {
gs_technique_begin_pass(tech, i);
gs_draw_sprite(texture, 0, video->output_width,
video->conversion_height);
gs_technique_end_pass(tech);
}
gs_technique_end(tech);
gs_enable_blending(true);
video->textures_converted[cur_texture] = true;
end:
profile_end(render_convert_texture_name);
}
static const char *stage_output_texture_name = "stage_output_texture";
static inline void stage_output_texture(struct obs_core_video *video,
int cur_texture, int prev_texture)
{
profile_start(stage_output_texture_name);
gs_texture_t *texture;
bool texture_ready;
gs_stagesurf_t *copy = video->copy_surfaces[cur_texture];
if (video->gpu_conversion) {
texture = video->convert_textures[prev_texture];
texture_ready = video->textures_converted[prev_texture];
} else {
texture = video->output_textures[prev_texture];
texture_ready = video->output_textures[prev_texture];
}
unmap_last_surface(video);
if (!texture_ready)
goto end;
gs_stage_texture(copy, texture);
video->textures_copied[cur_texture] = true;
end:
profile_end(stage_output_texture_name);
}
static inline void render_video(struct obs_core_video *video, int cur_texture,
int prev_texture)
{
gs_begin_scene();
gs_enable_depth_test(false);
gs_set_cull_mode(GS_NEITHER);
render_main_texture(video, cur_texture);
render_output_texture(video, cur_texture, prev_texture);
if (video->gpu_conversion)
render_convert_texture(video, cur_texture, prev_texture);
stage_output_texture(video, cur_texture, prev_texture);
gs_set_render_target(NULL, NULL);
gs_enable_blending(true);
gs_end_scene();
}
static inline bool download_frame(struct obs_core_video *video,
int prev_texture, struct video_data *frame)
{
gs_stagesurf_t *surface = video->copy_surfaces[prev_texture];
if (!video->textures_copied[prev_texture])
return false;
if (!gs_stagesurface_map(surface, &frame->data[0], &frame->linesize[0]))
return false;
video->mapped_surface = surface;
return true;
}
static inline uint32_t calc_linesize(uint32_t pos, uint32_t linesize)
{
uint32_t size = pos % linesize;
return size ? size : linesize;
}
static void copy_dealign(
uint8_t *dst, uint32_t dst_pos, uint32_t dst_linesize,
const uint8_t *src, uint32_t src_pos, uint32_t src_linesize,
uint32_t remaining)
{
while (remaining) {
uint32_t src_remainder = src_pos % src_linesize;
uint32_t dst_offset = dst_linesize - src_remainder;
uint32_t src_offset = src_linesize - src_remainder;
if (remaining < dst_offset) {
memcpy(dst + dst_pos, src + src_pos, remaining);
src_pos += remaining;
dst_pos += remaining;
remaining = 0;
} else {
memcpy(dst + dst_pos, src + src_pos, dst_offset);
src_pos += src_offset;
dst_pos += dst_offset;
remaining -= dst_offset;
}
}
}
static inline uint32_t make_aligned_linesize_offset(uint32_t offset,
uint32_t dst_linesize, uint32_t src_linesize)
{
uint32_t remainder = offset % dst_linesize;
return (offset / dst_linesize) * src_linesize + remainder;
}
static void fix_gpu_converted_alignment(struct obs_core_video *video,
struct video_frame *output, const struct video_data *input)
{
uint32_t src_linesize = input->linesize[0];
uint32_t dst_linesize = output->linesize[0] * 4;
uint32_t src_pos = 0;
for (size_t i = 0; i < 3; i++) {
if (video->plane_linewidth[i] == 0)
break;
src_pos = make_aligned_linesize_offset(video->plane_offsets[i],
dst_linesize, src_linesize);
copy_dealign(output->data[i], 0, dst_linesize,
input->data[0], src_pos, src_linesize,
video->plane_sizes[i]);
}
}
static void set_gpu_converted_data(struct obs_core_video *video,
struct video_frame *output, const struct video_data *input,
const struct video_output_info *info)
{
if (input->linesize[0] == video->output_width*4) {
struct video_frame frame;
for (size_t i = 0; i < 3; i++) {
if (video->plane_linewidth[i] == 0)
break;
frame.linesize[i] = video->plane_linewidth[i];
frame.data[i] =
input->data[0] + video->plane_offsets[i];
}
video_frame_copy(output, &frame, info->format, info->height);
} else {
fix_gpu_converted_alignment(video, output, input);
}
}
static void convert_frame(
struct video_frame *output, const struct video_data *input,
const struct video_output_info *info)
{
if (info->format == VIDEO_FORMAT_I420) {
compress_uyvx_to_i420(
input->data[0], input->linesize[0],
0, info->height,
output->data, output->linesize);
} else if (info->format == VIDEO_FORMAT_NV12) {
compress_uyvx_to_nv12(
input->data[0], input->linesize[0],
0, info->height,
output->data, output->linesize);
} else if (info->format == VIDEO_FORMAT_I444) {
convert_uyvx_to_i444(
input->data[0], input->linesize[0],
0, info->height,
output->data, output->linesize);
} else {
blog(LOG_ERROR, "convert_frame: unsupported texture format");
}
}
static inline void copy_rgbx_frame(
struct video_frame *output, const struct video_data *input,
const struct video_output_info *info)
{
uint8_t *in_ptr = input->data[0];
uint8_t *out_ptr = output->data[0];
/* if the line sizes match, do a single copy */
if (input->linesize[0] == output->linesize[0]) {
memcpy(out_ptr, in_ptr, input->linesize[0] * info->height);
} else {
for (size_t y = 0; y < info->height; y++) {
memcpy(out_ptr, in_ptr, info->width * 4);
in_ptr += input->linesize[0];
out_ptr += output->linesize[0];
}
}
}
static inline void output_video_data(struct obs_core_video *video,
struct video_data *input_frame, int count)
{
const struct video_output_info *info;
struct video_frame output_frame;
bool locked;
info = video_output_get_info(video->video);
locked = video_output_lock_frame(video->video, &output_frame, count,
input_frame->timestamp);
if (locked) {
if (video->gpu_conversion) {
set_gpu_converted_data(video, &output_frame,
input_frame, info);
} else if (format_is_yuv(info->format)) {
convert_frame(&output_frame, input_frame, info);
} else {
copy_rgbx_frame(&output_frame, input_frame, info);
}
video_output_unlock_frame(video->video);
}
}
static inline void video_sleep(struct obs_core_video *video,
uint64_t *p_time, uint64_t interval_ns)
{
struct obs_vframe_info vframe_info;
uint64_t cur_time = *p_time;
uint64_t t = cur_time + interval_ns;
int count;
if (os_sleepto_ns(t)) {
*p_time = t;
count = 1;
} else {
count = (int)((os_gettime_ns() - cur_time) / interval_ns);
*p_time = cur_time + interval_ns * count;
}
video->total_frames += count;
video->lagged_frames += count - 1;
vframe_info.timestamp = cur_time;
vframe_info.count = count;
circlebuf_push_back(&video->vframe_info_buffer, &vframe_info,
sizeof(vframe_info));
}
static const char *output_frame_gs_context_name = "gs_context(video->graphics)";
static const char *output_frame_render_video_name = "render_video";
static const char *output_frame_download_frame_name = "download_frame";
static const char *output_frame_gs_flush_name = "gs_flush";
static const char *output_frame_output_video_data_name = "output_video_data";
static inline void output_frame(void)
{
struct obs_core_video *video = &obs->video;
int cur_texture = video->cur_texture;
int prev_texture = cur_texture == 0 ? NUM_TEXTURES-1 : cur_texture-1;
struct video_data frame;
bool frame_ready;
memset(&frame, 0, sizeof(struct video_data));
profile_start(output_frame_gs_context_name);
gs_enter_context(video->graphics);
profile_start(output_frame_render_video_name);
render_video(video, cur_texture, prev_texture);
profile_end(output_frame_render_video_name);
profile_start(output_frame_download_frame_name);
frame_ready = download_frame(video, prev_texture, &frame);
profile_end(output_frame_download_frame_name);
profile_start(output_frame_gs_flush_name);
gs_flush();
profile_end(output_frame_gs_flush_name);
gs_leave_context();
profile_end(output_frame_gs_context_name);
if (frame_ready) {
struct obs_vframe_info vframe_info;
circlebuf_pop_front(&video->vframe_info_buffer, &vframe_info,
sizeof(vframe_info));
frame.timestamp = vframe_info.timestamp;
profile_start(output_frame_output_video_data_name);
output_video_data(video, &frame, vframe_info.count);
profile_end(output_frame_output_video_data_name);
}
if (++video->cur_texture == NUM_TEXTURES)
video->cur_texture = 0;
}
#define NBSP "\xC2\xA0"
static const char *tick_sources_name = "tick_sources";
static const char *render_displays_name = "render_displays";
static const char *output_frame_name = "output_frame";
void *obs_video_thread(void *param)
{
uint64_t last_time = 0;
uint64_t interval = video_output_get_frame_time(obs->video.video);
obs->video.video_time = os_gettime_ns();
os_set_thread_name("libobs: graphics thread");
const char *video_thread_name =
profile_store_name(obs_get_profiler_name_store(),
"obs_video_thread(%g"NBSP"ms)", interval / 1000000.);
profile_register_root(video_thread_name, interval);
while (!video_output_stopped(obs->video.video)) {
profile_start(video_thread_name);
profile_start(tick_sources_name);
last_time = tick_sources(obs->video.video_time, last_time);
profile_end(tick_sources_name);
profile_start(render_displays_name);
render_displays();
profile_end(render_displays_name);
profile_start(output_frame_name);
output_frame();
profile_end(output_frame_name);
profile_end(video_thread_name);
profile_reenable_thread();
video_sleep(&obs->video, &obs->video.video_time, interval);
}
UNUSED_PARAMETER(param);
return NULL;
}