gstreamer/gst/dvdspu/gstdvdspu-render.c
Jan Schmidt 077f84ac1f dvdspu element donated by Fluendo. It implements a DVD Sub-Picture
Original commit message from CVS:
* configure.ac:
* gst/dvdspu/.cvsignore:
* gst/dvdspu/Notes.txt:
* gst/dvdspu/gstdvdspu-render.c: (dvdspu_recalc_palette),
(dvdspu_update_palettes), (dvdspu_clear_comp_buffers),
(dvdspu_get_nibble), (dvdspu_get_rle_code), (dvdspu_draw_rle_run),
(rle_end_x), (dvdspu_render_line), (dvdspu_update_chgcol),
(dvdspu_render_line_with_chgcol), (dvdspu_blend_comp_buffers),
(gstdvdspu_render_spu):
* gst/dvdspu/gstdvdspu.c: (dvdspu_base_init), (dvdspu_class_init),
(dvdspu_init), (dvdspu_clear), (dvdspu_dispose), (dvdspu_finalize),
(dvdspu_flush_spu_info), (dvdspu_buffer_alloc), (dvdspu_src_event),
(dvdspu_video_set_caps), (dvdspu_video_proxy_getcaps),
(dvdspu_video_event), (dvdspu_video_chain),
(dvspu_handle_vid_buffer), (dvdspu_redraw_still),
(gstdvdspu_parse_chg_colcon), (dvdspu_exec_cmd_blk),
(dvdspu_finish_spu_buf), (dvdspu_setup_cmd_blk),
(dvdspu_handle_new_spu_buf), (dvdspu_handle_dvd_event),
(dvdspu_dump_dcsq), (dvdspu_advance_spu),
(dvdspu_check_still_updates), (dvdspu_subpic_chain),
(dvdspu_subpic_event), (dvdspu_change_state),
(gstdvdspu_plugin_init):
* gst/dvdspu/gstdvdspu.h:
dvdspu element donated by Fluendo. It implements a DVD Sub-Picture
Unit, decoding and overlaying DVD subtitles and menu graphics.
* gst/mpeg2sub/.cvsignore:
* gst/mpeg2sub/Makefile.am:
* gst/mpeg2sub/Notes.txt:
* gst/mpeg2sub/gstmpeg2subt.c:
* gst/mpeg2sub/gstmpeg2subt.h:
* gst/mpeg2sub/mpeg2subt.vcproj:
Delete old and broken mpeg2subt element that was never ported from 0.8
2007-08-27 14:33:59 +00:00

521 lines
17 KiB
C

/* GStreamer DVD Sub-Picture Unit
* Copyright (C) 2007 Fluendo S.A. <info@fluendo.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <string.h>
#include <gst/gst.h>
#include "gstdvdspu.h"
GST_DEBUG_CATEGORY_EXTERN (dvdspu_debug);
#define GST_CAT_DEFAULT dvdspu_debug
static void
dvdspu_recalc_palette (GstDVDSpu * dvdspu,
SpuColour * dest, guint8 * idx, guint8 * alpha)
{
SpuState *state = &dvdspu->spu_state;
gint i;
for (i = 0; i < 4; i++, dest++) {
guint32 col = state->current_clut[idx[i]];
dest->Y = (guint16) ((col >> 16) & 0xff) * alpha[i];
/* U/V are stored as V/U in the clut words, so switch them */
dest->U = (guint16) (col & 0xff) * alpha[i];
dest->V = (guint16) ((col >> 8) & 0xff) * alpha[i];
dest->A = alpha[i];
}
}
/* Recalculate the main, HL & ChgCol palettes */
static void
dvdspu_update_palettes (GstDVDSpu * dvdspu, SpuState * state)
{
gint16 l, c;
guint8 index[4]; /* Indices for the palette */
guint8 alpha[4]; /* Alpha values the palette */
if (state->main_pal_dirty) {
dvdspu_recalc_palette (dvdspu, state->main_pal, state->main_idx,
state->main_alpha);
/* Need to refresh the hl_ctrl info copies of the main palette too */
memcpy (state->hl_ctrl_i.pix_ctrl_i[0].pal_cache, state->main_pal,
4 * sizeof (SpuColour));
memcpy (state->hl_ctrl_i.pix_ctrl_i[2].pal_cache, state->main_pal,
4 * sizeof (SpuColour));
state->main_pal_dirty = FALSE;
}
if (state->hl_pal_dirty) {
dvdspu_recalc_palette (dvdspu, state->hl_ctrl_i.pix_ctrl_i[1].pal_cache,
state->hl_idx, state->hl_alpha);
state->hl_pal_dirty = FALSE;
}
/* Update the offset positions for the highlight region */
if (state->hl_rect.top != -1) {
state->hl_ctrl_i.top = state->hl_rect.top;
state->hl_ctrl_i.bottom = state->hl_rect.bottom;
state->hl_ctrl_i.n_changes = 3;
state->hl_ctrl_i.pix_ctrl_i[0].left = 0;
state->hl_ctrl_i.pix_ctrl_i[1].left = state->hl_rect.left;
state->hl_ctrl_i.pix_ctrl_i[2].left = state->hl_rect.right + 1;
}
if (state->line_ctrl_i_pal_dirty) {
GST_LOG_OBJECT (dvdspu, "Updating chg-col-con palettes");
for (l = 0; l < state->n_line_ctrl_i; l++) {
SpuLineCtrlI *cur_line_ctrl = state->line_ctrl_i + l;
for (c = 0; c < cur_line_ctrl->n_changes; c++) {
SpuPixCtrlI *cur = cur_line_ctrl->pix_ctrl_i + c;
index[3] = (cur->palette >> 28) & 0x0f;
index[2] = (cur->palette >> 24) & 0x0f;
index[1] = (cur->palette >> 20) & 0x0f;
index[0] = (cur->palette >> 16) & 0x0f;
alpha[3] = (cur->palette >> 12) & 0x0f;
alpha[2] = (cur->palette >> 8) & 0x0f;
alpha[1] = (cur->palette >> 4) & 0x0f;
alpha[0] = (cur->palette) & 0x0f;
dvdspu_recalc_palette (dvdspu, cur->pal_cache, index, alpha);
}
}
state->line_ctrl_i_pal_dirty = FALSE;
}
}
static void
dvdspu_clear_comp_buffers (SpuState * state)
{
/* The area to clear is the line inside the disp_rect, each entry 2 bytes,
* of the sub-sampled UV planes. */
gint16 left = state->disp_rect.left / 2;
gint16 right = state->disp_rect.right / 2;
gint16 uv_width = 2 * (right - left + 1);
memset (state->comp_bufs[0] + left, 0, uv_width);
memset (state->comp_bufs[1] + left, 0, uv_width);
memset (state->comp_bufs[2] + left, 0, uv_width);
state->comp_last_x[0] = -1;
state->comp_last_x[1] = -1;
}
static inline guint8
dvdspu_get_nibble (SpuState * state, guint16 * rle_offset)
{
guint8 ret;
if (G_UNLIKELY (*rle_offset >= state->max_offset))
return 0; /* Overran the buffer */
ret = GST_BUFFER_DATA (state->pix_buf)[(*rle_offset) / 2];
/* If the offset is even, we shift the answer down 4 bits, otherwise not */
if (*rle_offset & 0x01)
ret &= 0x0f;
else
ret = ret >> 4;
(*rle_offset)++;
return ret;
}
static guint16
dvdspu_get_rle_code (SpuState * state, guint16 * rle_offset)
{
guint16 code;
code = dvdspu_get_nibble (state, rle_offset);
if (code < 0x4) { /* 4 .. f */
code = (code << 4) | dvdspu_get_nibble (state, rle_offset);
if (code < 0x10) { /* 1x .. 3x */
code = (code << 4) | dvdspu_get_nibble (state, rle_offset);
if (code < 0x40) { /* 04x .. 0fx */
code = (code << 4) | dvdspu_get_nibble (state, rle_offset);
}
}
}
return code;
}
static inline void
dvdspu_draw_rle_run (SpuState * state, gint16 x, gint16 end, SpuColour * colour)
{
#if 0
GST_LOG ("Y: %d x: %d end %d col %d %d %d %d",
state->cur_Y, x, end, colour->Y, colour->U, colour->V, colour->A);
#endif
if (colour->A != 0) {
guint8 inv_A = 0xf - colour->A;
/* FIXME: This could be more efficient */
while (x < end) {
state->out_Y[x] = (inv_A * state->out_Y[x] + colour->Y) / 0xf;
state->out_U[x / 2] += colour->U;
state->out_V[x / 2] += colour->V;
state->out_A[x / 2] += colour->A;
x++;
}
/* Update the compositing buffer so we know how much to blend later */
*(state->comp_last_x_ptr) = end;
}
}
static inline gint16
rle_end_x (guint16 rle_code, gint16 x, gint16 end)
{
/* run length = rle_code >> 2 */
if (G_UNLIKELY (((rle_code >> 2) == 0)))
return end;
else
return MIN (end, x + (rle_code >> 2));
}
static void dvdspu_render_line_with_chgcol (SpuState * state,
guint8 * planes[3], guint16 * rle_offset);
static gboolean dvdspu_update_chgcol (SpuState * state);
static void
dvdspu_render_line (SpuState * state, guint8 * planes[3], guint16 * rle_offset)
{
gint16 x, next_x, end, rle_code;
SpuColour *colour;
/* Check for special case of chg_col info to use (either highlight or
* ChgCol command */
if (state->cur_chg_col != NULL) {
if (dvdspu_update_chgcol (state)) {
/* Check the top & bottom, because we might not be within the region yet */
if (state->cur_Y >= state->cur_chg_col->top &&
state->cur_Y <= state->cur_chg_col->bottom) {
dvdspu_render_line_with_chgcol (state, planes, rle_offset);
return;
}
}
}
/* No special case. Render as normal */
/* Set up our output pointers */
state->out_Y = planes[0];
state->out_U = state->comp_bufs[0];
state->out_V = state->comp_bufs[1];
state->out_A = state->comp_bufs[2];
/* We always need to start our RLE decoding byte_aligned */
*rle_offset = GST_ROUND_UP_2 (*rle_offset);
x = state->disp_rect.left;
end = state->disp_rect.right + 1;
while (x < end) {
rle_code = dvdspu_get_rle_code (state, rle_offset);
colour = &state->main_pal[rle_code & 3];
next_x = rle_end_x (rle_code, x, end);
/* Now draw the run between [x,next_x) */
dvdspu_draw_rle_run (state, x, next_x, colour);
x = next_x;
}
}
static gboolean
dvdspu_update_chgcol (SpuState * state)
{
if (state->cur_chg_col == NULL)
return FALSE;
if (state->cur_Y <= state->cur_chg_col->bottom)
return TRUE;
while (state->cur_chg_col < state->cur_chg_col_end) {
if (state->cur_Y >= state->cur_chg_col->top &&
state->cur_Y <= state->cur_chg_col->bottom) {
#if 0
g_print ("Stopped @ entry %d with top %d bottom %d, cur_y %d",
(gint16) (state->cur_chg_col - state->line_ctrl_i),
state->cur_chg_col->top, state->cur_chg_col->bottom, y);
#endif
return TRUE;
}
state->cur_chg_col++;
}
/* Finished all our cur_chg_col entries. Use the main palette from here on */
state->cur_chg_col = NULL;
return FALSE;
}
static void
dvdspu_render_line_with_chgcol (SpuState * state, guint8 * planes[3],
guint16 * rle_offset)
{
SpuLineCtrlI *chg_col = state->cur_chg_col;
gint16 x, next_x, disp_end, rle_code, run_end;
SpuColour *colour;
SpuPixCtrlI *cur_pix_ctrl;
SpuPixCtrlI *next_pix_ctrl;
SpuPixCtrlI *end_pix_ctrl;
SpuPixCtrlI dummy_pix_ctrl;
gint16 cur_reg_end;
gint i;
state->out_Y = planes[0];
state->out_U = state->comp_bufs[0];
state->out_V = state->comp_bufs[1];
state->out_A = state->comp_bufs[2];
/* We always need to start our RLE decoding byte_aligned */
*rle_offset = GST_ROUND_UP_2 (*rle_offset);
/* Our run will cover the display rect */
x = state->disp_rect.left;
disp_end = state->disp_rect.right + 1;
/* Work out the first pixel control info, which may point to the dummy entry if
* the global palette/alpha need using initally */
cur_pix_ctrl = chg_col->pix_ctrl_i;
end_pix_ctrl = chg_col->pix_ctrl_i + chg_col->n_changes;
if (cur_pix_ctrl->left != 0) {
next_pix_ctrl = cur_pix_ctrl;
cur_pix_ctrl = &dummy_pix_ctrl;
for (i = 0; i < 4; i++) /* Copy the main palette to our dummy entry */
dummy_pix_ctrl.pal_cache[i] = state->main_pal[i];
} else {
next_pix_ctrl = cur_pix_ctrl + 1;
}
if (next_pix_ctrl < end_pix_ctrl)
cur_reg_end = next_pix_ctrl->left;
else
cur_reg_end = disp_end;
/* Render stuff */
while (x < disp_end) {
rle_code = dvdspu_get_rle_code (state, rle_offset);
next_x = rle_end_x (rle_code, x, disp_end);
/* Now draw the run between [x,next_x), crossing palette regions as needed */
while (x < next_x) {
run_end = MIN (next_x, cur_reg_end);
if (G_LIKELY (x < run_end)) {
colour = &cur_pix_ctrl->pal_cache[rle_code & 3];
dvdspu_draw_rle_run (state, x, run_end, colour);
x = run_end;
}
if (x >= cur_reg_end) {
/* Advance to next region */
cur_pix_ctrl = next_pix_ctrl;
next_pix_ctrl++;
if (next_pix_ctrl < end_pix_ctrl)
cur_reg_end = next_pix_ctrl->left;
else
cur_reg_end = disp_end;
}
}
}
}
static void
dvdspu_blend_comp_buffers (SpuState * state, guint8 * planes[3])
{
gint16 uv_end;
gint16 left, x;
guint8 *out_U;
guint8 *out_V;
guint16 *in_U;
guint16 *in_V;
guint16 *in_A;
gint16 comp_last_x = MAX (state->comp_last_x[0], state->comp_last_x[1]);
if (comp_last_x < state->disp_rect.left)
return; /* Didn't draw in the comp buffers, nothing to do... */
#if 0
GST_LOG ("Blending comp buffers from disp_rect.left %d to x=%d",
state->disp_rect.left, comp_last_x);
#endif
/* Set up the output pointers */
out_U = planes[1]; /* U plane */
out_V = planes[2]; /* V plane */
/* Input starts at the first pixel of the compositing buffer */
in_U = state->comp_bufs[0]; /* U comp buffer */
in_V = state->comp_bufs[1]; /* V comp buffer */
in_A = state->comp_bufs[2]; /* A comp buffer */
/* Calculate how many pixels to blend based on the maximum X value that was
* drawn in the render_line function, divided by 2 (rounding up) to account
* for UV sub-sampling */
uv_end = (comp_last_x + 1) / 2;
left = state->disp_rect.left / 2;
for (x = left; x < uv_end; x++) {
guint16 tmp;
guint16 inv_A = (4 * 0xf) - in_A[x];
/* Each entry in the compositing buffer is 4 summed pixels, so the
* inverse alpha is (4 * 0x0f) - in_A[x] */
tmp = in_U[x] + inv_A * out_U[x];
out_U[x] = (guint8) (tmp / (4 * 0xf));
tmp = in_V[x] + inv_A * out_V[x];
out_V[x] = (guint8) (tmp / (4 * 0xf));
}
}
void
gstdvdspu_render_spu (GstDVDSpu * dvdspu, GstBuffer * buf)
{
SpuState *state = &dvdspu->spu_state;
guint8 *planes[3]; /* YUV frame pointers */
gint y, last_y;
/* Set up our initial state */
/* Store the start of each plane */
planes[0] = GST_BUFFER_DATA (buf);
planes[1] = planes[0] + (state->Y_height * state->Y_stride);
planes[2] = planes[1] + (state->UV_height * state->UV_stride);
/* Sanity check */
g_return_if_fail (planes[2] + (state->UV_height * state->UV_stride) <=
GST_BUFFER_DATA (buf) + GST_BUFFER_SIZE (buf));
GST_DEBUG ("Rendering SPU. disp_rect %d,%d to %d,%d. hl_rect %d,%d to %d,%d",
state->disp_rect.left, state->disp_rect.top,
state->disp_rect.right, state->disp_rect.bottom,
state->hl_rect.left, state->hl_rect.top,
state->hl_rect.right, state->hl_rect.bottom);
/* We start rendering from the first line of the display rect */
y = state->disp_rect.top;
/* Update our plane references to the first line of the disp_rect */
planes[0] += state->Y_stride * y;
planes[1] += state->UV_stride * (y / 2);
planes[2] += state->UV_stride * (y / 2);
/* When reading RLE data, we track the offset in nibbles... */
state->cur_offsets[0] = state->pix_data[0] * 2;
state->cur_offsets[1] = state->pix_data[1] * 2;
state->max_offset = GST_BUFFER_SIZE (state->pix_buf) * 2;
/* Update all the palette caches */
dvdspu_update_palettes (dvdspu, state);
/* Set up HL or Change Color & Contrast rect tracking */
if (state->hl_rect.top != -1) {
state->cur_chg_col = &state->hl_ctrl_i;
state->cur_chg_col_end = state->cur_chg_col + 1;
} else if (state->n_line_ctrl_i > 0) {
state->cur_chg_col = state->line_ctrl_i;
state->cur_chg_col_end = state->cur_chg_col + state->n_line_ctrl_i;
} else
state->cur_chg_col = NULL;
/* start_y is always an even number and we render lines in pairs from there,
* accumulating 2 lines of chroma then blending it. We might need to render a
* single line at the end if the display rect ends on an even line too. */
last_y = (state->disp_rect.bottom - 1) & ~(0x01);
for (state->cur_Y = y; state->cur_Y <= last_y; state->cur_Y++) {
/* Reset the compositing buffer */
dvdspu_clear_comp_buffers (state);
/* Render even line */
state->comp_last_x_ptr = state->comp_last_x;
dvdspu_render_line (state, planes, &state->cur_offsets[0]);
/* Advance the luminance output pointer */
planes[0] += state->Y_stride;
state->cur_Y++;
/* Render odd line */
state->comp_last_x_ptr = state->comp_last_x + 1;
dvdspu_render_line (state, planes, &state->cur_offsets[1]);
/* Blend the accumulated UV compositing buffers onto the output */
dvdspu_blend_comp_buffers (state, planes);
/* Update all the output pointers */
planes[0] += state->Y_stride;
planes[1] += state->UV_stride;
planes[2] += state->UV_stride;
}
if (state->cur_Y == state->disp_rect.bottom) {
g_assert ((state->disp_rect.bottom & 0x01) == 0);
/* Render a remaining lone last even line. y already has the correct value
* after the above loop exited. */
dvdspu_clear_comp_buffers (state);
state->comp_last_x_ptr = state->comp_last_x;
dvdspu_render_line (state, planes, &state->cur_offsets[0]);
dvdspu_blend_comp_buffers (state, planes);
}
/* for debugging purposes, draw a faint rectangle at the edges of the disp_rect */
#if 0
do {
guint8 *cur;
gint16 pos;
cur = GST_BUFFER_DATA (buf) + state->Y_stride * state->disp_rect.top;
for (pos = state->disp_rect.left + 1; pos < state->disp_rect.right; pos++)
cur[pos] = (cur[pos] / 2) + 0x8;
cur = GST_BUFFER_DATA (buf) + state->Y_stride * state->disp_rect.bottom;
for (pos = state->disp_rect.left + 1; pos < state->disp_rect.right; pos++)
cur[pos] = (cur[pos] / 2) + 0x8;
cur = GST_BUFFER_DATA (buf) + state->Y_stride * state->disp_rect.top;
for (pos = state->disp_rect.top; pos <= state->disp_rect.bottom; pos++) {
cur[state->disp_rect.left] = (cur[state->disp_rect.left] / 2) + 0x8;
cur[state->disp_rect.right] = (cur[state->disp_rect.right] / 2) + 0x8;
cur += state->Y_stride;
}
} while (0);
#endif
/* For debugging purposes, draw a faint rectangle around the highlight rect */
#if 0
if (state->hl_rect.top != -1) {
guint8 *cur;
gint16 pos;
cur = GST_BUFFER_DATA (buf) + state->Y_stride * state->hl_rect.top;
for (pos = state->hl_rect.left + 1; pos < state->hl_rect.right; pos++)
cur[pos] = (cur[pos] / 2) + 0x8;
cur = GST_BUFFER_DATA (buf) + state->Y_stride * state->hl_rect.bottom;
for (pos = state->hl_rect.left + 1; pos < state->hl_rect.right; pos++)
cur[pos] = (cur[pos] / 2) + 0x8;
cur = GST_BUFFER_DATA (buf) + state->Y_stride * state->hl_rect.top;
for (pos = state->hl_rect.top; pos <= state->hl_rect.bottom; pos++) {
cur[state->hl_rect.left] = (cur[state->hl_rect.left] / 2) + 0x8;
cur[state->hl_rect.right] = (cur[state->hl_rect.right] / 2) + 0x8;
cur += state->Y_stride;
}
}
#endif
}