mirror of
https://github.com/mpv-player/mpv
synced 2025-01-21 15:12:48 +00:00
51befc9deb
There was a somewhat obscure optimization in the OSD and subtitle rendering path: if only the position of the sub-images changed, and not the actual image data, uploading of the image data could be skipped. In theory, this could speed up things like scrolling subtitles. But it turns out that even in the rare cases subtitles have such scrolls or axis-aligned movement, modern libass rarely signals this kind of change. Possibly this is because of sub-pixel handling and such, which break this. As such, it's a worthless optimization and just introduces additional complexity and subtle bugs (especially in cases libass does the opposite: incorrectly signaling a position change only, which happened before). Remove this optimization, and rename bitmap_pos_id to change_id.
419 lines
13 KiB
C
419 lines
13 KiB
C
/*
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* This file is part of mplayer.
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*
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* mplayer is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* mplayer 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 General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with mplayer. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdlib.h>
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#include <assert.h>
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#include <libavutil/common.h>
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#include "bitmap_packer.h"
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#include "gl_utils.h"
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#include "gl_osd.h"
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struct osd_fmt_entry {
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GLint internal_format;
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GLint format;
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GLenum type;
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};
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// glBlendFuncSeparate() arguments
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static const int blend_factors[SUBBITMAP_COUNT][4] = {
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[SUBBITMAP_LIBASS] = {GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA,
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GL_ONE, GL_ONE_MINUS_SRC_ALPHA},
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[SUBBITMAP_RGBA] = {GL_ONE, GL_ONE_MINUS_SRC_ALPHA,
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GL_ONE, GL_ONE_MINUS_SRC_ALPHA},
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};
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static const struct osd_fmt_entry osd_to_gl3_formats[SUBBITMAP_COUNT] = {
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[SUBBITMAP_LIBASS] = {GL_RED, GL_RED, GL_UNSIGNED_BYTE},
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[SUBBITMAP_RGBA] = {GL_RGBA, GL_RGBA, GL_UNSIGNED_BYTE},
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};
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static const struct osd_fmt_entry osd_to_gles3_formats[SUBBITMAP_COUNT] = {
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[SUBBITMAP_LIBASS] = {GL_R8, GL_RED, GL_UNSIGNED_BYTE},
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[SUBBITMAP_RGBA] = {GL_RGBA8, GL_RGBA, GL_UNSIGNED_BYTE},
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};
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static const struct osd_fmt_entry osd_to_gl2_formats[SUBBITMAP_COUNT] = {
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[SUBBITMAP_LIBASS] = {GL_LUMINANCE, GL_LUMINANCE, GL_UNSIGNED_BYTE},
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[SUBBITMAP_RGBA] = {GL_RGBA, GL_RGBA, GL_UNSIGNED_BYTE},
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};
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struct vertex {
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float position[2];
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float texcoord[2];
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uint8_t ass_color[4];
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};
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static const struct gl_vao_entry vertex_vao[] = {
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{"position", 2, GL_FLOAT, false, offsetof(struct vertex, position)},
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{"texcoord" , 2, GL_FLOAT, false, offsetof(struct vertex, texcoord)},
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{"ass_color", 4, GL_UNSIGNED_BYTE, true, offsetof(struct vertex, ass_color)},
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{0}
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};
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struct mpgl_osd_part {
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enum sub_bitmap_format format;
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int change_id;
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GLuint texture;
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int w, h;
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GLuint buffer;
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int num_subparts;
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struct sub_bitmap *subparts;
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struct vertex *vertices;
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struct bitmap_packer *packer;
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};
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struct mpgl_osd {
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struct mp_log *log;
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struct osd_state *osd;
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GL *gl;
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bool use_pbo;
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bool scaled;
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struct mpgl_osd_part *parts[MAX_OSD_PARTS];
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const struct osd_fmt_entry *fmt_table;
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bool formats[SUBBITMAP_COUNT];
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struct gl_vao vao;
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// temporary
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int stereo_mode;
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int display_size[2];
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void *scratch;
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};
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struct mpgl_osd *mpgl_osd_init(GL *gl, struct mp_log *log, struct osd_state *osd)
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{
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GLint max_texture_size;
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gl->GetIntegerv(GL_MAX_TEXTURE_SIZE, &max_texture_size);
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struct mpgl_osd *ctx = talloc_ptrtype(NULL, ctx);
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*ctx = (struct mpgl_osd) {
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.log = log,
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.osd = osd,
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.gl = gl,
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.fmt_table = osd_to_gl3_formats,
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.scratch = talloc_zero_size(ctx, 1),
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};
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if (gl->es >= 300) {
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ctx->fmt_table = osd_to_gles3_formats;
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} else if (!(gl->mpgl_caps & MPGL_CAP_TEX_RG)) {
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ctx->fmt_table = osd_to_gl2_formats;
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}
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for (int n = 0; n < MAX_OSD_PARTS; n++) {
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struct mpgl_osd_part *p = talloc_ptrtype(ctx, p);
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*p = (struct mpgl_osd_part) {
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.packer = talloc_struct(p, struct bitmap_packer, {
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.w_max = max_texture_size,
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.h_max = max_texture_size,
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}),
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};
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ctx->parts[n] = p;
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}
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for (int n = 0; n < SUBBITMAP_COUNT; n++)
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ctx->formats[n] = ctx->fmt_table[n].type != 0;
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gl_vao_init(&ctx->vao, gl, sizeof(struct vertex), vertex_vao);
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return ctx;
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}
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void mpgl_osd_destroy(struct mpgl_osd *ctx)
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{
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if (!ctx)
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return;
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GL *gl = ctx->gl;
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gl_vao_uninit(&ctx->vao);
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for (int n = 0; n < MAX_OSD_PARTS; n++) {
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struct mpgl_osd_part *p = ctx->parts[n];
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gl->DeleteTextures(1, &p->texture);
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if (gl->DeleteBuffers)
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gl->DeleteBuffers(1, &p->buffer);
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}
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talloc_free(ctx);
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}
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void mpgl_osd_set_options(struct mpgl_osd *ctx, bool pbo)
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{
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ctx->use_pbo = pbo;
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}
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static bool upload_pbo(struct mpgl_osd *ctx, struct mpgl_osd_part *osd,
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struct sub_bitmaps *imgs)
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{
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GL *gl = ctx->gl;
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bool success = true;
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struct osd_fmt_entry fmt = ctx->fmt_table[imgs->format];
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int pix_stride = glFmt2bpp(fmt.format, fmt.type);
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if (!osd->buffer) {
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gl->GenBuffers(1, &osd->buffer);
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gl->BindBuffer(GL_PIXEL_UNPACK_BUFFER, osd->buffer);
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gl->BufferData(GL_PIXEL_UNPACK_BUFFER, osd->w * osd->h * pix_stride,
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NULL, GL_DYNAMIC_COPY);
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gl->BindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
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}
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gl->BindBuffer(GL_PIXEL_UNPACK_BUFFER, osd->buffer);
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char *data = gl->MapBuffer(GL_PIXEL_UNPACK_BUFFER, GL_WRITE_ONLY);
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if (!data) {
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success = false;
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} else {
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struct pos bb[2];
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packer_get_bb(osd->packer, bb);
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size_t stride = osd->w * pix_stride;
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packer_copy_subbitmaps(osd->packer, imgs, data, pix_stride, stride);
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if (!gl->UnmapBuffer(GL_PIXEL_UNPACK_BUFFER))
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success = false;
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glUploadTex(gl, GL_TEXTURE_2D, fmt.format, fmt.type, NULL, stride,
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bb[0].x, bb[0].y, bb[1].x - bb[0].x, bb[1].y - bb[0].y, 0);
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}
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gl->BindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
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if (!success) {
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MP_FATAL(ctx, "Error: can't upload subtitles! "
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"Remove the 'pbo' suboption.\n");
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}
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return success;
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}
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static void upload_tex(struct mpgl_osd *ctx, struct mpgl_osd_part *osd,
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struct sub_bitmaps *imgs)
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{
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struct osd_fmt_entry fmt = ctx->fmt_table[imgs->format];
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if (osd->packer->padding) {
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struct pos bb[2];
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packer_get_bb(osd->packer, bb);
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glClearTex(ctx->gl, GL_TEXTURE_2D, fmt.format, fmt.type,
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bb[0].x, bb[0].y, bb[1].x - bb[0].y, bb[1].y - bb[0].y,
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0, &ctx->scratch);
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}
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for (int n = 0; n < osd->packer->count; n++) {
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struct sub_bitmap *s = &imgs->parts[n];
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struct pos p = osd->packer->result[n];
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glUploadTex(ctx->gl, GL_TEXTURE_2D, fmt.format, fmt.type,
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s->bitmap, s->stride, p.x, p.y, s->w, s->h, 0);
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}
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}
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static bool upload_osd(struct mpgl_osd *ctx, struct mpgl_osd_part *osd,
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struct sub_bitmaps *imgs)
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{
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GL *gl = ctx->gl;
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// assume 2x2 filter on scaling
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osd->packer->padding = ctx->scaled || imgs->scaled;
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int r = packer_pack_from_subbitmaps(osd->packer, imgs);
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if (r < 0) {
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MP_ERR(ctx, "OSD bitmaps do not fit on a surface with the maximum "
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"supported size %dx%d.\n", osd->packer->w_max, osd->packer->h_max);
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return false;
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}
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struct osd_fmt_entry fmt = ctx->fmt_table[imgs->format];
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assert(fmt.type != 0);
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if (!osd->texture)
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gl->GenTextures(1, &osd->texture);
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gl->BindTexture(GL_TEXTURE_2D, osd->texture);
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if (osd->packer->w > osd->w || osd->packer->h > osd->h
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|| osd->format != imgs->format)
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{
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osd->format = imgs->format;
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osd->w = FFMAX(32, osd->packer->w);
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osd->h = FFMAX(32, osd->packer->h);
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gl->TexImage2D(GL_TEXTURE_2D, 0, fmt.internal_format, osd->w, osd->h,
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0, fmt.format, fmt.type, NULL);
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gl->TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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gl->TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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gl->TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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gl->TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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if (gl->DeleteBuffers)
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gl->DeleteBuffers(1, &osd->buffer);
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osd->buffer = 0;
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}
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bool uploaded = false;
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if (ctx->use_pbo)
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uploaded = upload_pbo(ctx, osd, imgs);
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if (!uploaded)
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upload_tex(ctx, osd, imgs);
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gl->BindTexture(GL_TEXTURE_2D, 0);
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return true;
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}
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static void gen_osd_cb(void *pctx, struct sub_bitmaps *imgs)
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{
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struct mpgl_osd *ctx = pctx;
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if (imgs->num_parts == 0 || !ctx->formats[imgs->format])
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return;
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struct mpgl_osd_part *osd = ctx->parts[imgs->render_index];
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if (imgs->change_id != osd->change_id) {
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if (!upload_osd(ctx, osd, imgs))
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osd->packer->count = 0;
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osd->change_id = imgs->change_id;
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}
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osd->num_subparts = osd->packer->count;
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MP_TARRAY_GROW(osd, osd->subparts, osd->num_subparts);
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memcpy(osd->subparts, imgs->parts,
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osd->num_subparts * sizeof(osd->subparts[0]));
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}
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static void write_quad(struct vertex *va, struct gl_transform t,
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float x0, float y0, float x1, float y1,
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float tx0, float ty0, float tx1, float ty1,
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float tex_w, float tex_h, const uint8_t color[4])
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{
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gl_transform_vec(t, &x0, &y0);
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gl_transform_vec(t, &x1, &y1);
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#define COLOR_INIT {color[0], color[1], color[2], color[3]}
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va[0] = (struct vertex){ {x0, y0}, {tx0 / tex_w, ty0 / tex_h}, COLOR_INIT };
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va[1] = (struct vertex){ {x0, y1}, {tx0 / tex_w, ty1 / tex_h}, COLOR_INIT };
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va[2] = (struct vertex){ {x1, y0}, {tx1 / tex_w, ty0 / tex_h}, COLOR_INIT };
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va[3] = (struct vertex){ {x1, y1}, {tx1 / tex_w, ty1 / tex_h}, COLOR_INIT };
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va[4] = va[2];
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va[5] = va[1];
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#undef COLOR_INIT
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}
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static int generate_verts(struct mpgl_osd_part *part, struct gl_transform t)
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{
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int num_vertices = part->num_subparts * 6;
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MP_TARRAY_GROW(part, part->vertices, num_vertices);
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for (int n = 0; n < part->num_subparts; n++) {
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struct sub_bitmap *b = &part->subparts[n];
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struct pos pos = part->packer->result[n];
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struct vertex *va = part->vertices;
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// NOTE: the blend color is used with SUBBITMAP_LIBASS only, so it
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// doesn't matter that we upload garbage for the other formats
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uint32_t c = b->libass.color;
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uint8_t color[4] = { c >> 24, (c >> 16) & 0xff,
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(c >> 8) & 0xff, 255 - (c & 0xff) };
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write_quad(&va[n * 6], t,
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b->x, b->y, b->x + b->dw, b->y + b->dh,
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pos.x, pos.y, pos.x + b->w, pos.y + b->h,
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part->w, part->h, color);
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}
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return num_vertices;
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}
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static void draw_part(struct mpgl_osd *ctx, int index, struct gl_transform t)
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{
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GL *gl = ctx->gl;
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struct mpgl_osd_part *part = ctx->parts[index];
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int num_vertices = generate_verts(part, t);
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if (!num_vertices)
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return;
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gl->Enable(GL_BLEND);
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gl->BindTexture(GL_TEXTURE_2D, part->texture);
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const int *factors = &blend_factors[part->format][0];
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gl->BlendFuncSeparate(factors[0], factors[1], factors[2], factors[3]);
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gl_vao_draw_data(&ctx->vao, GL_TRIANGLES, part->vertices, num_vertices);
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gl->BindTexture(GL_TEXTURE_2D, 0);
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gl->Disable(GL_BLEND);
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}
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// number of screen divisions per axis (x=0, y=1) for the current 3D mode
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static void get_3d_side_by_side(int stereo_mode, int div[2])
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{
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div[0] = div[1] = 1;
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switch (stereo_mode) {
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case MP_STEREO3D_SBS2L:
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case MP_STEREO3D_SBS2R: div[0] = 2; break;
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case MP_STEREO3D_AB2R:
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case MP_STEREO3D_AB2L: div[1] = 2; break;
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}
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}
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void mpgl_osd_draw_part(struct mpgl_osd *ctx, int vp_w, int vp_h, int index)
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{
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int div[2];
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get_3d_side_by_side(ctx->stereo_mode, div);
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ctx->gl->Viewport(0, 0, vp_w, abs(vp_h));
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for (int x = 0; x < div[0]; x++) {
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for (int y = 0; y < div[1]; y++) {
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struct gl_transform t;
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gl_transform_ortho(&t, 0, vp_w, 0, vp_h);
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float a_x = ctx->display_size[0] * x;
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float a_y = ctx->display_size[1] * y;
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t.t[0] += a_x * t.m[0][0] + a_y * t.m[1][0];
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t.t[1] += a_x * t.m[0][1] + a_y * t.m[1][1];
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draw_part(ctx, index, t);
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}
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}
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}
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enum sub_bitmap_format mpgl_osd_get_part_format(struct mpgl_osd *ctx, int index)
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{
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assert(index >= 0 && index < MAX_OSD_PARTS);
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return ctx->parts[index]->format;
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}
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struct gl_vao *mpgl_osd_get_vao(struct mpgl_osd *ctx)
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{
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return &ctx->vao;
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}
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void mpgl_osd_generate(struct mpgl_osd *ctx, struct mp_osd_res res, double pts,
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int stereo_mode)
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{
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for (int n = 0; n < MAX_OSD_PARTS; n++)
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ctx->parts[n]->num_subparts = 0;
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int div[2];
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get_3d_side_by_side(stereo_mode, div);
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struct mp_osd_res s_res = res;
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ctx->display_size[0] = s_res.w = s_res.w / div[0];
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ctx->display_size[1] = s_res.h = s_res.h / div[1];
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osd_draw(ctx->osd, s_res, pts, 0, ctx->formats, gen_osd_cb, ctx);
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ctx->stereo_mode = stereo_mode;
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}
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