mirror of https://github.com/mpv-player/mpv
373 lines
10 KiB
C
373 lines
10 KiB
C
/*
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* This file is part of mpv.
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*
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* mpv is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* mpv is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "common/common.h"
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#include "filters/filter.h"
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#include "filters/filter_internal.h"
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#include "filters/user_filters.h"
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#include "options/m_config.h"
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#include "options/m_option.h"
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#include "options/options.h"
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#include "video/out/aspect.h"
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#include "video/out/gpu/video.h"
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#include "video/out/opengl/egl_helpers.h"
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#include "video/out/opengl/ra_gl.h"
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struct offscreen_ctx {
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struct mp_log *log;
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struct ra *ra;
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void *priv;
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void (*set_context)(struct offscreen_ctx *ctx, bool enable);
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};
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struct gl_offscreen_ctx {
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GL gl;
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EGLDisplay egl_display;
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EGLContext egl_context;
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};
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static void gl_ctx_destroy(void *p)
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{
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struct offscreen_ctx *ctx = p;
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struct gl_offscreen_ctx *gl = ctx->priv;
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ra_free(&ctx->ra);
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if (gl->egl_context)
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eglDestroyContext(gl->egl_display, gl->egl_context);
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}
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static void gl_ctx_set_context(struct offscreen_ctx *ctx, bool enable)
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{
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struct gl_offscreen_ctx *gl = ctx->priv;
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EGLContext c = enable ? gl->egl_context : EGL_NO_CONTEXT;
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if (!eglMakeCurrent(gl->egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE, c))
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MP_ERR(ctx, "Could not make EGL context current.\n");
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}
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static struct offscreen_ctx *gl_offscreen_ctx_create(struct mpv_global *global,
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struct mp_log *log)
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{
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struct offscreen_ctx *ctx = talloc_zero(NULL, struct offscreen_ctx);
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struct gl_offscreen_ctx *gl = talloc_zero(ctx, struct gl_offscreen_ctx);
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talloc_set_destructor(ctx, gl_ctx_destroy);
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*ctx = (struct offscreen_ctx){
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.log = log,
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.priv = gl,
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.set_context = gl_ctx_set_context,
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};
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// This appears to work with Mesa. EGL 1.5 doesn't specify what a "default
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// display" is at all.
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gl->egl_display = eglGetDisplay(EGL_DEFAULT_DISPLAY);
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if (!eglInitialize(gl->egl_display, NULL, NULL)) {
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MP_ERR(ctx, "Could not initialize EGL.\n");
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goto error;
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}
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// Unfortunately, mpegl_create_context() is entangled with ra_ctx.
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// Fortunately, it does not need much, and we can provide a stub.
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struct ra_ctx ractx = {
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.log = ctx->log,
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.global = global,
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};
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EGLConfig config;
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if (!mpegl_create_context(&ractx, gl->egl_display, &gl->egl_context, &config))
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{
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MP_ERR(ctx, "Could not create EGL context.\n");
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goto error;
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}
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if (!eglMakeCurrent(gl->egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE,
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gl->egl_context))
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{
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MP_ERR(ctx, "Could not make EGL context current.\n");
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goto error;
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}
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mpegl_load_functions(&gl->gl, ctx->log);
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ctx->ra = ra_create_gl(&gl->gl, ctx->log);
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if (!ctx->ra)
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goto error;
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gl_ctx_set_context(ctx, false);
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return ctx;
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error:
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talloc_free(ctx);
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return NULL;
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}
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static void offscreen_ctx_set_current(struct offscreen_ctx *ctx, bool enable)
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{
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if (ctx->set_context)
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ctx->set_context(ctx, enable);
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}
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struct gpu_opts {
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int w, h;
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};
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struct priv {
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struct gpu_opts *opts;
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struct m_config_cache *vo_opts_cache;
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struct mp_vo_opts *vo_opts;
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struct offscreen_ctx *ctx;
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struct gl_video *renderer;
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struct ra_tex *target;
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struct mp_image_params img_params;
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uint64_t next_frame_id;
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};
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static struct mp_image *gpu_render_frame(struct mp_filter *f, struct mp_image *in)
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{
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struct priv *priv = f->priv;
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bool ok = false;
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struct mp_image *res = NULL;
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struct ra *ra = priv->ctx->ra;
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if (priv->opts->w <= 0)
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priv->opts->w = in->w;
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if (priv->opts->h <= 0)
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priv->opts->h = in->h;
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int w = priv->opts->w;
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int h = priv->opts->h;
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struct vo_frame frame = {
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.pts = in->pts,
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.duration = -1,
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.num_vsyncs = 1,
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.current = in,
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.num_frames = 1,
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.frames = {in},
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.frame_id = ++(priv->next_frame_id),
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};
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bool need_reconfig = m_config_cache_update(priv->vo_opts_cache);
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if (!mp_image_params_equal(&priv->img_params, &in->params)) {
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priv->img_params = in->params;
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gl_video_config(priv->renderer, &in->params);
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need_reconfig = true;
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}
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if (need_reconfig) {
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struct mp_rect src, dst;
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struct mp_osd_res osd;
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struct mp_stream_info *info = mp_filter_find_stream_info(f);
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struct osd_state *osd_state = info ? info->osd : NULL;
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if (osd_state) {
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osd_set_render_subs_in_filter(osd_state, true);
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// Assume the osd_state doesn't somehow disappear.
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gl_video_set_osd_source(priv->renderer, osd_state);
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}
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mp_get_src_dst_rects(f->log, priv->vo_opts, VO_CAP_ROTATE90, &in->params,
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w, h, 1, &src, &dst, &osd);
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gl_video_resize(priv->renderer, &src, &dst, &osd);
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}
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if (!priv->target) {
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struct ra_tex_params params = {
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.dimensions = 2,
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.downloadable = true,
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.w = w,
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.h = h,
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.render_dst = true,
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};
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params.format = ra_find_unorm_format(ra, 1, 4);
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if (!params.format || !params.format->renderable)
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goto done;
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priv->target = ra_tex_create(ra, ¶ms);
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if (!priv->target)
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goto done;
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}
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// (it doesn't have access to the OSD though)
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int flags = RENDER_FRAME_SUBS | RENDER_FRAME_VF_SUBS;
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gl_video_render_frame(priv->renderer, &frame, (struct ra_fbo){priv->target},
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flags);
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res = mp_image_alloc(IMGFMT_RGB0, w, h);
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if (!res)
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goto done;
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struct ra_tex_download_params download_params = {
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.tex = priv->target,
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.dst = res->planes[0],
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.stride = res->stride[0],
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};
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if (!ra->fns->tex_download(ra, &download_params))
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goto done;
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ok = true;
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done:
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if (!ok)
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TA_FREEP(&res);
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return res;
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}
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static void gpu_process(struct mp_filter *f)
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{
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struct priv *priv = f->priv;
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if (!mp_pin_can_transfer_data(f->ppins[1], f->ppins[0]))
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return;
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struct mp_frame frame = mp_pin_out_read(f->ppins[0]);
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if (mp_frame_is_signaling(frame)) {
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mp_pin_in_write(f->ppins[1], frame);
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return;
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}
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if (frame.type != MP_FRAME_VIDEO)
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goto error;
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offscreen_ctx_set_current(priv->ctx, true);
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struct mp_image *mpi = frame.data;
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struct mp_image *res = gpu_render_frame(f, mpi);
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if (!res) {
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MP_ERR(f, "Could not render or retrieve frame.\n");
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goto error;
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}
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// It's not clear which parameters to copy.
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res->pts = mpi->pts;
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res->dts = mpi->dts;
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res->nominal_fps = mpi->nominal_fps;
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talloc_free(mpi);
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mp_pin_in_write(f->ppins[1], MAKE_FRAME(MP_FRAME_VIDEO, res));
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return;
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error:
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mp_frame_unref(&frame);
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mp_filter_internal_mark_failed(f);
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offscreen_ctx_set_current(priv->ctx, false);
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}
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static void gpu_reset(struct mp_filter *f)
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{
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struct priv *priv = f->priv;
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offscreen_ctx_set_current(priv->ctx, true);
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gl_video_reset(priv->renderer);
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offscreen_ctx_set_current(priv->ctx, false);
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}
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static void gpu_destroy(struct mp_filter *f)
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{
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struct priv *priv = f->priv;
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if (priv->ctx) {
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offscreen_ctx_set_current(priv->ctx, true);
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gl_video_uninit(priv->renderer);
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ra_tex_free(priv->ctx->ra, &priv->target);
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offscreen_ctx_set_current(priv->ctx, false);
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}
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talloc_free(priv->ctx);
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}
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static const struct mp_filter_info gpu_filter = {
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.name = "gpu",
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.process = gpu_process,
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.reset = gpu_reset,
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.destroy = gpu_destroy,
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.priv_size = sizeof(struct priv),
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};
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static struct mp_filter *gpu_create(struct mp_filter *parent, void *options)
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{
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struct mp_filter *f = mp_filter_create(parent, &gpu_filter);
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if (!f) {
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talloc_free(options);
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return NULL;
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}
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mp_filter_add_pin(f, MP_PIN_IN, "in");
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mp_filter_add_pin(f, MP_PIN_OUT, "out");
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struct priv *priv = f->priv;
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priv->opts = talloc_steal(priv, options);
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priv->vo_opts_cache = m_config_cache_alloc(f, f->global, &vo_sub_opts);
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priv->vo_opts = priv->vo_opts_cache->opts;
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priv->ctx = gl_offscreen_ctx_create(f->global, f->log);
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if (!priv->ctx) {
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MP_FATAL(f, "Could not create offscreen ra context.\n");
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goto error;
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}
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if (!priv->ctx->ra->fns->tex_download) {
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MP_FATAL(f, "Offscreen ra context does not support image retrieval.\n");
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goto error;
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}
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offscreen_ctx_set_current(priv->ctx, true);
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priv->renderer = gl_video_init(priv->ctx->ra, f->log, f->global);
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assert(priv->renderer); // can't fail (strangely)
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offscreen_ctx_set_current(priv->ctx, false);
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MP_WARN(f, "This is experimental. Keep in mind:\n");
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MP_WARN(f, " - OSD rendering is done in software.\n");
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MP_WARN(f, " - Encoding will convert the RGB output to yuv420p in software.\n");
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MP_WARN(f, " - Using this with --vo=gpu will filter the video twice!\n");
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MP_WARN(f, " (And you can't prevent this; they use the same options.)\n");
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MP_WARN(f, " - Some features are simply not supported.\n");
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return f;
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error:
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talloc_free(f);
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return NULL;
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}
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#define OPT_BASE_STRUCT struct gpu_opts
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const struct mp_user_filter_entry vf_gpu = {
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.desc = {
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.description = "vo_gpu as filter",
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.name = "gpu",
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.priv_size = sizeof(OPT_BASE_STRUCT),
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.options = (const struct m_option[]){
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{"w", OPT_INT(w)},
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{"h", OPT_INT(h)},
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{0}
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},
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},
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.create = gpu_create,
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};
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