diff options
author | Jan Schmidt <thaytan@mad.scientist.com> | 2007-08-27 14:33:59 +0000 |
---|---|---|
committer | Jan Schmidt <thaytan@mad.scientist.com> | 2007-08-27 14:33:59 +0000 |
commit | 077f84ac1f89770faf8b8af7c0856ec765906a89 (patch) | |
tree | f60c2a667bf656a2ad9a065752ac21ff37d31f21 /gst/dvdspu | |
parent | b0d65aa59b993a3334e2f4428f8a429ae04cc894 (diff) | |
download | gstreamer-plugins-bad-077f84ac1f89770faf8b8af7c0856ec765906a89.tar.gz |
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
Diffstat (limited to 'gst/dvdspu')
-rw-r--r-- | gst/dvdspu/.gitignore | 7 | ||||
-rw-r--r-- | gst/dvdspu/Notes.txt | 324 | ||||
-rw-r--r-- | gst/dvdspu/gstdvdspu-render.c | 521 | ||||
-rw-r--r-- | gst/dvdspu/gstdvdspu.c | 1376 | ||||
-rw-r--r-- | gst/dvdspu/gstdvdspu.h | 226 |
5 files changed, 2454 insertions, 0 deletions
diff --git a/gst/dvdspu/.gitignore b/gst/dvdspu/.gitignore new file mode 100644 index 000000000..08f5ed37d --- /dev/null +++ b/gst/dvdspu/.gitignore @@ -0,0 +1,7 @@ +Makefile +Makefile.in +*.o +*.lo +*.la +.deps +.libs diff --git a/gst/dvdspu/Notes.txt b/gst/dvdspu/Notes.txt new file mode 100644 index 000000000..a0e56e3c1 --- /dev/null +++ b/gst/dvdspu/Notes.txt @@ -0,0 +1,324 @@ +
+ DVD subtitles
+ ---------------
+
+
+ 0. Introduction
+ 1. Basics
+ 2. The data structure
+ 3. Reading the control header
+ 4. Decoding the graphics
+ 5. What I do not know yet / What I need
+ 6. Thanks
+ 7. Changes
+
+
+
+
+
+The latest version of this document can be found here:
+http://www.via.ecp.fr/~sam/doc/dvd/
+
+
+
+
+
+0. Introduction
+
+ One of the last things we missed in DVD decoding under my system was the
+decoding of subtitles. I found no information on the web or Usenet about them,
+apart from a few words on them being run-length encoded in the DVD FAQ.
+
+ So we decided to reverse-engineer their format (it's completely legal in
+France, since we did it on interoperability purposes), and managed to get
+almost all of it.
+
+
+
+
+
+1. Basics
+
+ DVD subtitles are hidden in private PS packets (0x000001ba), just like AC3
+streams are.
+
+ Within the PS packet, there are PES packets, and like AC3, the header for the
+ones containing subtitles have a 0x000001bd header.
+ As for AC3, where there's an ID like (0x80 + x), there's a subtitle ID equal
+to (0x20 + x), where x is the subtitle ID. Thus there seems to be only
+16 possible different subtitles on a DVD (my Taxi Driver copy has 16).
+
+ I'll suppose you know how to extract AC3 from a DVD, and jump to the
+interesting part of this documentation. Anyway you're unlikely to have
+understood what I said without already being familiar with MPEG2.
+
+
+
+
+
+2. The data structure
+
+A subtitle packet, after its parts have been collected and appended, looks
+like this :
+
+ +----------------------------------------------------------+
+ | |
+ | 0 2 size |
+ | +----+------------------------+-----------------+ |
+ | |size| data packet | control | |
+ | +----+------------------------+-----------------+ |
+ | |
+ | a subtitle packet |
+ | |
+ +----------------------------------------------------------+
+
+size is a 2 bytes word, and data packet and control may have any size.
+
+
+Here is the structure of the data packet :
+
+ +----------------------------------------------------------+
+ | |
+ | 2 4 S0+2 |
+ | +----+------------------------------------------+ |
+ | | S0 | data | |
+ | +----+------------------------------------------+ |
+ | |
+ | the data packet |
+ | |
+ +----------------------------------------------------------+
+
+S0, the data packet size, is a 2 bytes word.
+
+
+Finally, here's the structure of the control packet :
+
+ +----------------------------------------------------------+
+ | |
+ | S0+2 S0+4 S1 size |
+ | +----+---------+---------+--+---------+--+---------+ |
+ | | S1 |ctrl seq |ctrl seq |..|ctrl seq |ff| end seq | |
+ | +----+---------+---------+--+---------+--+---------+ |
+ | |
+ | the control packet |
+ | |
+ +----------------------------------------------------------+
+
+To summarize :
+
+ - S1, at offset S0+2, the position of the end sequence
+ - several control sequences
+ - the 'ff' byte
+ - the end sequence
+
+
+
+
+
+3. Reading the control header
+
+The first thing to read is the control sequences. There are several
+types of them, and each type is determined by its first byte. As far
+as I know, each type has a fixed length.
+
+ * type 0x01 : '01' - 1 byte
+ it seems to be an empty control sequence.
+
+ * type 0x03 : '03wxyz' - 3 bytes
+ this one has the palette information ; it basically says 'encoded color 0
+ is the wth color of the palette, encoded color 1 is the xth color, aso.
+
+ * type 0x04 : '04wxyz' - 3 bytes
+ I *think* this is the alpha channel information ; I only saw values of 0 or f
+ for those nibbles, so I can't really be sure, but it seems plausable.
+
+ * type 0x05 : '05xxxXXXyyyYYY' - 7 bytes
+ the coordinates of the subtitle on the screen :
+ xxx is the first column of the subtitle
+ XXX is the last column of the subtitle
+ yyy is the first line of the subtitle
+ YYY is the last line of the subtitle
+ thus the subtitle's size is (XXX-xxx+1) x (YYY-yyy+1)
+
+ * type 0x06 : '06xxxxyyyy' - 5 bytes
+ xxxx is the position of the first graphic line, and yyyy is the position of
+ the second one (the graphics are interlaced, so it helps a lot :p)
+
+The end sequence has this structure:
+
+ xxxx yyyy 02 ff (ff)
+
+ it ends with 'ff' or 'ffff', to make the whole packet have an even length.
+
+FIXME: I absolutely don't know what xxxx is. I suppose it may be some date
+information since I found it nowhere else, but I can't be sure.
+
+ yyyy is equal to S1 (see picture).
+
+
+Example of a control header :
+----
+0A 0C 01 03 02 31 04 0F F0 05 00 02 CF 00 22 3E 06 00 06 04 E9 FF 00 93 0A 0C 02 FF
+----
+Let's decode it. First of all, S1 = 0x0a0c.
+
+The control sequences are :
+ 01
+ Nothing to say about this one
+ 03 02 31
+ Color 0 is 0, color 1 is 2, color 2 is 3, and color 3 is 1.
+ 04 0F F0
+ Colors 0 and 3 are transparent, and colors 2 and 3 are opaque (not sure of this one)
+ 05 00 02 CF 00 22 3E
+ The first column is 0x000, the last one is 0x2cf, the first line is 0x002, and
+ the last line is 0x23e. Thus the subtitle's size is 0x2d0 x 0x23d.
+ 06 00 06 04 E9
+ The first encoded image starts at offset 0x006, and the second one starts at 0x04e9.
+
+And the end sequence is :
+ 00 93 0A 0C 02 FF
+ Which means... well, not many things now. We can at least verify that S1 (0x0a0c) is
+ there.
+
+
+
+
+
+4. Decoding the graphics
+
+ The graphics are rather easy to decode (at least, when you know how to do it - it
+ took us one whole week to figure out what the encoding was :p).
+
+ The picture is interlaced, for instance for a 40 lines picture :
+
+ line 0 ---------------#----------
+ line 2 ------#-------------------
+ ...
+ line 38 ------------#-------------
+ line 1 ------------------#-------
+ line 3 --------#-----------------
+ ...
+ line 39 -------------#------------
+
+ When decoding you should get:
+
+ line 0 ---------------#----------
+ line 1 ------------------#-------
+ line 2 ------#-------------------
+ line 3 --------#-----------------
+ ...
+ line 38 ------------#-------------
+ line 39 -------------#------------
+
+ Computers with weak processors could choose only to decode even lines
+ in order to gain some time, for instance.
+
+
+ The encoding is run-length encoded, with the following alphabet:
+
+ 0xf
+ 0xe
+ 0xd
+ 0xc
+ 0xb
+ 0xa
+ 0x9
+ 0x8
+ 0x7
+ 0x6
+ 0x5
+ 0x4
+ 0x3-
+ 0x2-
+ 0x1-
+ 0x0f-
+ 0x0e-
+ 0x0d-
+ 0x0c-
+ 0x0b-
+ 0x0a-
+ 0x09-
+ 0x08-
+ 0x07-
+ 0x06-
+ 0x05-
+ 0x04-
+ 0x03--
+ 0x02--
+ 0x01--
+ 0x0000
+
+ '-' stands for any other nibble. Once a sequence X of this alphabet has
+ been read, the pixels can be displayed : (X >> 2) is the number of pixels
+ to display, and (X & 0x3) is the color of the pixel.
+
+ For instance, 0x23 means "8 pixels of color 3".
+
+ "0000" has a special meaning : it's a carriage return. The decoder should
+ do a carriage return when reaching the end of the line, or when encountering
+ this "0000" sequence. When doing a carriage return, the parser should be
+ reset to the next even position (it cannot be nibble-aligned at the start
+ of a line).
+
+ After a carriage return, the parser should read a line on the other
+ interlaced picture, and swap like this after each carriage return.
+
+ Perhaps I don't explain this very well, so you'd better have a look at
+ the enclosed source.
+
+
+
+
+
+5. What I do not know yet / What I need
+
+I don't know what's in the end sequence yet.
+
+Also, I don't know exactly when to display subtitles, and when to remove them.
+
+I don't know if there are other types of control sequences (in my programs I consider
+0xff as a control sequence type, as well as 0x02. I don't know if it's correct or not,
+so please comment on this).
+
+I don't know what the "official" color palette is.
+
+I don't know how to handle transparency information.
+
+I don't know if this document is generic enough.
+
+So what I need is you :
+
+ - if you can, patch this document or my programs to fix strange behaviour with your subtitles.
+
+ - send me your subtitles (there's a program to extract them enclosed) ; the first 10 KB
+ of subtitles in a VOB should be enough, but it would be cool if you sent me one subtitle
+ file per language.
+
+
+
+
+
+6. Thanks
+
+ Thanks to Michel Lespinasse <walken@via.ecp.fr> for his great help on understanding
+the RLE stuff, and for all the ideas he had.
+
+ Thanks to mass (David Waite) and taaz (David I. Lehn) from irc at
+openprojects.net for sending me their subtitles.
+
+
+
+
+
+7. Changes
+
+ 20000116: added the 'changes' section.
+ 20000116: added David Waite's and David I. Lehn's name.
+ 20000116: changed "x0" and "x1" to "S0" and "S1" to make it less confusing.
+
+
+
+
+--
+Paris, January 16th 2000
+Samuel Hocevar <sam@via.ecp.fr>
diff --git a/gst/dvdspu/gstdvdspu-render.c b/gst/dvdspu/gstdvdspu-render.c new file mode 100644 index 000000000..1825712df --- /dev/null +++ b/gst/dvdspu/gstdvdspu-render.c @@ -0,0 +1,521 @@ +/* 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 +} diff --git a/gst/dvdspu/gstdvdspu.c b/gst/dvdspu/gstdvdspu.c new file mode 100644 index 000000000..85d80f5a6 --- /dev/null +++ b/gst/dvdspu/gstdvdspu.c @@ -0,0 +1,1376 @@ +/* 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 <gst/video/video.h> + +#include "gstdvdspu.h" + +GST_DEBUG_CATEGORY (dvdspu_debug); +#define GST_CAT_DEFAULT dvdspu_debug + +/* Convert an STM offset in the SPU sequence to a GStreamer timestamp */ +#define STM_TO_GST(stm) ((GST_MSECOND * 1024 * (stm)) / 90) + +/* Filter signals and args */ +enum +{ + /* FILL ME */ + LAST_SIGNAL +}; + +static GstStaticPadTemplate video_sink_factory = +GST_STATIC_PAD_TEMPLATE ("video", + GST_PAD_SINK, + GST_PAD_ALWAYS, + GST_STATIC_CAPS ("video/x-raw-yuv, " "format = (fourcc) { I420 }, " + "width = (int) [ 16, 4096 ], " "height = (int) [ 16, 4096 ]") + /* FIXME: Can support YV12 one day too */ + ); + +static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src", + GST_PAD_SRC, + GST_PAD_ALWAYS, + GST_STATIC_CAPS ("video/x-raw-yuv, " "format = (fourcc) { I420 }, " + "width = (int) [ 16, 4096 ], " "height = (int) [ 16, 4096 ]") + /* FIXME: Can support YV12 one day too */ + ); + +static GstStaticPadTemplate subpic_sink_factory = +GST_STATIC_PAD_TEMPLATE ("subpicture", + GST_PAD_SINK, + GST_PAD_ALWAYS, + GST_STATIC_CAPS ("video/x-dvd-subpicture") + ); + +GST_BOILERPLATE (GstDVDSpu, dvdspu, GstElement, GST_TYPE_ELEMENT); + +static void dvdspu_dispose (GstDVDSpu * dvdspu); +static void dvdspu_finalize (GstDVDSpu * dvdspu); +static GstStateChangeReturn dvdspu_change_state (GstElement * element, + GstStateChange transition); + +static gboolean dvdspu_src_event (GstPad * pad, GstEvent * event); + +static GstCaps *dvdspu_video_proxy_getcaps (GstPad * pad); +static gboolean dvdspu_video_set_caps (GstPad * pad, GstCaps * caps); +static GstFlowReturn dvdspu_video_chain (GstPad * pad, GstBuffer * buf); +static gboolean dvdspu_video_event (GstPad * pad, GstEvent * event); +static GstFlowReturn dvdspu_buffer_alloc (GstPad * sinkpad, guint64 offset, + guint size, GstCaps * caps, GstBuffer ** buf); +static void dvdspu_redraw_still (GstDVDSpu * dvdspu); + +static void dvdspu_check_still_updates (GstDVDSpu * dvdspu); +static GstFlowReturn dvdspu_subpic_chain (GstPad * pad, GstBuffer * buf); +static gboolean dvdspu_subpic_event (GstPad * pad, GstEvent * event); + +static void dvdspu_clear (GstDVDSpu * dvdspu); +static void dvdspu_flush_spu_info (GstDVDSpu * dvdspu); +static void dvdspu_advance_spu (GstDVDSpu * dvdspu, GstClockTime new_ts); +static GstFlowReturn +dvspu_handle_vid_buffer (GstDVDSpu * dvdspu, GstBuffer * buf); + +static void +dvdspu_base_init (gpointer gclass) +{ + static GstElementDetails element_details = + GST_ELEMENT_DETAILS ("Fluendo DVD Player Sub-picture Overlay", + "Mixer/Video/Overlay/DVD", + "Parses the DVD Sub-Picture command stream and renders the SPU overlay " + "onto the video as it passes through", + "Jan Schmidt <jan@fluendo.com>"); + GstElementClass *element_class = GST_ELEMENT_CLASS (gclass); + + gst_element_class_add_pad_template (element_class, + gst_static_pad_template_get (&src_factory)); + gst_element_class_add_pad_template (element_class, + gst_static_pad_template_get (&video_sink_factory)); + gst_element_class_add_pad_template (element_class, + gst_static_pad_template_get (&subpic_sink_factory)); + gst_element_class_set_details (element_class, &element_details); + + element_class->change_state = dvdspu_change_state; +} + +static void +dvdspu_class_init (GstDVDSpuClass * klass) +{ + GObjectClass *gobject_class; + GstElementClass *gstelement_class; + + gobject_class = (GObjectClass *) klass; + gstelement_class = (GstElementClass *) klass; + + gobject_class->dispose = (GObjectFinalizeFunc) dvdspu_dispose; + gobject_class->finalize = (GObjectFinalizeFunc) dvdspu_finalize; +} + +static void +dvdspu_init (GstDVDSpu * dvdspu, GstDVDSpuClass * gclass) +{ + dvdspu->videosinkpad = + gst_pad_new_from_static_template (&video_sink_factory, "video"); + gst_pad_set_setcaps_function (dvdspu->videosinkpad, dvdspu_video_set_caps); + gst_pad_set_getcaps_function (dvdspu->videosinkpad, + dvdspu_video_proxy_getcaps); + gst_pad_set_chain_function (dvdspu->videosinkpad, dvdspu_video_chain); + gst_pad_set_event_function (dvdspu->videosinkpad, dvdspu_video_event); + gst_pad_set_bufferalloc_function (dvdspu->videosinkpad, dvdspu_buffer_alloc); + + dvdspu->srcpad = gst_pad_new_from_static_template (&src_factory, "src"); + gst_pad_set_event_function (dvdspu->srcpad, dvdspu_src_event); + gst_pad_set_getcaps_function (dvdspu->srcpad, dvdspu_video_proxy_getcaps); + + dvdspu->subpic_sinkpad = + gst_pad_new_from_static_template (&subpic_sink_factory, "subpicture"); + gst_pad_set_chain_function (dvdspu->subpic_sinkpad, dvdspu_subpic_chain); + gst_pad_set_event_function (dvdspu->subpic_sinkpad, dvdspu_subpic_event); + gst_pad_use_fixed_caps (dvdspu->subpic_sinkpad); + + gst_element_add_pad (GST_ELEMENT (dvdspu), dvdspu->videosinkpad); + gst_element_add_pad (GST_ELEMENT (dvdspu), dvdspu->subpic_sinkpad); + gst_element_add_pad (GST_ELEMENT (dvdspu), dvdspu->srcpad); + + dvdspu->spu_lock = g_mutex_new (); + dvdspu->pending_spus = g_queue_new (); + + dvdspu_clear (dvdspu); +} + +static void +dvdspu_clear (GstDVDSpu * dvdspu) +{ + dvdspu_flush_spu_info (dvdspu); + + gst_buffer_replace (&dvdspu->ref_frame, NULL); + gst_buffer_replace (&dvdspu->pending_frame, NULL); + + dvdspu->spu_state.fps_n = 25; + dvdspu->spu_state.fps_d = 1; + + gst_segment_init (&dvdspu->video_seg, GST_FORMAT_UNDEFINED); +} + +static void +dvdspu_dispose (GstDVDSpu * dvdspu) +{ + /* need to hold the SPU lock in case other stuff is still running... */ + GSTDVDSPU_LOCK (dvdspu); + dvdspu_clear (dvdspu); + GSTDVDSPU_UNLOCK (dvdspu); +} + +static void +dvdspu_finalize (GstDVDSpu * dvdspu) +{ + gint i; + + for (i = 0; i < 3; i++) { + if (dvdspu->spu_state.comp_bufs[i] != NULL) { + g_free (dvdspu->spu_state.comp_bufs[i]); + dvdspu->spu_state.comp_bufs[i] = NULL; + } + } + g_queue_free (dvdspu->pending_spus); + g_mutex_free (dvdspu->spu_lock); +} + +/* With SPU lock held, clear the queue of SPU packets */ +static void +dvdspu_flush_spu_info (GstDVDSpu * dvdspu) +{ + SpuPacket *packet; + SpuState *state = &dvdspu->spu_state; + + GST_INFO_OBJECT (dvdspu, "Flushing SPU information"); + + gst_segment_init (&dvdspu->subp_seg, GST_FORMAT_UNDEFINED); + + if (dvdspu->partial_spu) { + gst_buffer_unref (dvdspu->partial_spu); + dvdspu->partial_spu = NULL; + } + + packet = (SpuPacket *) g_queue_pop_head (dvdspu->pending_spus); + while (packet != NULL) { + if (packet->buf) + gst_buffer_unref (packet->buf); + if (packet->event) + gst_event_unref (packet->event); + g_free (packet); + packet = (SpuPacket *) g_queue_pop_head (dvdspu->pending_spus); + } + + if (state->buf) { + gst_buffer_unref (state->buf); + state->buf = NULL; + } + if (state->pix_buf) { + gst_buffer_unref (state->pix_buf); + state->pix_buf = NULL; + } + + state->base_ts = state->next_ts = GST_CLOCK_TIME_NONE; + state->flags &= ~(SPU_STATE_FLAGS_MASK); + state->pix_data[0] = 0; + state->pix_data[1] = 0; + + state->hl_rect.top = -1; + state->hl_rect.bottom = -1; + + state->disp_rect.top = -1; + state->disp_rect.bottom = -1; + + state->n_line_ctrl_i = 0; + if (state->line_ctrl_i != NULL) { + g_free (state->line_ctrl_i); + state->line_ctrl_i = NULL; + } +} + +/* Proxy buffer allocations on the video sink pad downstream */ +static GstFlowReturn +dvdspu_buffer_alloc (GstPad * sinkpad, guint64 offset, guint size, + GstCaps * caps, GstBuffer ** buf) +{ + GstDVDSpu *dvdspu = GSTDVDSPU (gst_pad_get_parent (sinkpad)); + GstFlowReturn ret = GST_FLOW_OK; + + ret = gst_pad_alloc_buffer (dvdspu->srcpad, offset, size, caps, buf); + + gst_object_unref (dvdspu); + + return ret; +} + +static gboolean +dvdspu_src_event (GstPad * pad, GstEvent * event) +{ + GstDVDSpu *dvdspu = GSTDVDSPU (gst_pad_get_parent (pad)); + GstPad *peer; + gboolean res = TRUE; + + peer = gst_pad_get_peer (dvdspu->videosinkpad); + if (peer) { + res = gst_pad_send_event (peer, event); + gst_object_unref (peer); + } + + gst_object_unref (dvdspu); + return res; +} + +static gboolean +dvdspu_video_set_caps (GstPad * pad, GstCaps * caps) +{ + GstDVDSpu *dvdspu = GSTDVDSPU (gst_pad_get_parent (pad)); + gboolean res = FALSE; + GstStructure *s; + gint w, h; + gint i; + gint fps_n, fps_d; + SpuState *state; + + s = gst_caps_get_structure (caps, 0); + + if (!gst_structure_get_int (s, "width", &w) || + !gst_structure_get_int (s, "height", &h) || + !gst_structure_get_fraction (s, "framerate", &fps_n, &fps_d)) { + goto done; + } + + GSTDVDSPU_LOCK (dvdspu); + + state = &dvdspu->spu_state; + + state->fps_n = fps_n; + state->fps_d = fps_d; + + state->vid_height = h; + state->Y_height = GST_ROUND_UP_2 (h); + state->UV_height = state->Y_height / 2; + + if (state->vid_width != w) { + state->vid_width = w; + state->Y_stride = GST_ROUND_UP_4 (w); + state->UV_stride = GST_ROUND_UP_4 (state->Y_stride / 2); + for (i = 0; i < 3; i++) { + state->comp_bufs[i] = g_realloc (state->comp_bufs[i], + sizeof (guint16) * state->UV_stride); + } + } + GSTDVDSPU_UNLOCK (dvdspu); + + res = TRUE; +done: + gst_object_unref (dvdspu); + return res; +} + +static GstCaps * +dvdspu_video_proxy_getcaps (GstPad * pad) +{ + GstDVDSpu *dvdspu = GSTDVDSPU (gst_pad_get_parent (pad)); + GstCaps *caps; + GstPad *otherpad; + + /* Proxy the getcaps between videosink and the srcpad, ignoring the + * subpicture sink pad */ + otherpad = (pad == dvdspu->srcpad) ? dvdspu->videosinkpad : dvdspu->srcpad; + + caps = gst_pad_peer_get_caps (otherpad); + if (caps) { + GstCaps *temp; + const GstCaps *templ; + + templ = gst_pad_get_pad_template_caps (otherpad); + temp = gst_caps_intersect (caps, templ); + gst_caps_unref (caps); + caps = temp; + } else { + caps = gst_caps_copy (gst_pad_get_pad_template_caps (pad)); + } + + gst_object_unref (dvdspu); + return caps; +} + +static gboolean +dvdspu_video_event (GstPad * pad, GstEvent * event) +{ + GstDVDSpu *dvdspu = (GstDVDSpu *) (gst_object_get_parent (GST_OBJECT (pad))); + SpuState *state = &dvdspu->spu_state; + gboolean res = TRUE; + + g_return_val_if_fail (dvdspu != NULL, FALSE); + + switch (GST_EVENT_TYPE (event)) { + case GST_EVENT_CUSTOM_DOWNSTREAM: + case GST_EVENT_CUSTOM_DOWNSTREAM_OOB: + { + const GstStructure *structure = gst_event_get_structure (event); + const char *event_type; + + if (!gst_structure_has_name (structure, "application/x-gst-dvd")) { + res = gst_pad_event_default (pad, event); + break; + } + + event_type = gst_structure_get_string (structure, "event"); + GST_DEBUG_OBJECT (dvdspu, + "DVD event of type %s on video pad", event_type); + + if (strcmp (event_type, "dvd-still") == 0) { + gboolean in_still; + + if (gst_structure_get_boolean (structure, "still-state", &in_still)) { + GSTDVDSPU_LOCK (dvdspu); + if (in_still) { + state->flags |= SPU_STATE_STILL_FRAME; + /* Entering still. Advance the SPU to make sure the state is + * up to date */ + dvdspu_check_still_updates (dvdspu); + /* And re-draw the still frame to make sure it appears on + * screen, otherwise the last frame might have been discarded + * by QoS */ + dvdspu_redraw_still (dvdspu); + } else + state->flags &= ~(SPU_STATE_STILL_FRAME); + GSTDVDSPU_UNLOCK (dvdspu); + } + gst_event_unref (event); + res = TRUE; + } else + res = gst_pad_event_default (pad, event); + break; + } + case GST_EVENT_NEWSEGMENT: + { + gboolean update; + gdouble rate, arate; + GstFormat format; + gint64 start, stop, time; + + gst_event_parse_new_segment_full (event, &update, &rate, &arate, &format, + &start, &stop, &time); + + if (format != GST_FORMAT_TIME) + return FALSE; + + /* Only print updates if they have an end time (don't print start_time + * updates */ + GST_DEBUG_OBJECT (dvdspu, "video pad NewSegment:" + " Update %d, rate %g arate %g format %d start %" GST_TIME_FORMAT + " %" GST_TIME_FORMAT " position %" GST_TIME_FORMAT, + update, rate, arate, format, GST_TIME_ARGS (start), + GST_TIME_ARGS (stop), GST_TIME_ARGS (time)); + + GSTDVDSPU_LOCK (dvdspu); + + if (update && start > dvdspu->video_seg.last_stop) { +#if 0 + g_print ("Segment update for video. Advancing from %" GST_TIME_FORMAT + " to %" GST_TIME_FORMAT "\n", + GST_TIME_ARGS (dvdspu->video_seg.last_stop), GST_TIME_ARGS (start)); +#endif + while (dvdspu->video_seg.last_stop < start && + !(state->flags & SPU_STATE_STILL_FRAME)) { + GSTDVDSPU_UNLOCK (dvdspu); + if (dvspu_handle_vid_buffer (dvdspu, NULL) != GST_FLOW_OK) { + GSTDVDSPU_LOCK (dvdspu); + break; + } + GSTDVDSPU_LOCK (dvdspu); + } + } + + gst_segment_set_newsegment_full (&dvdspu->video_seg, update, rate, arate, + format, start, stop, time); + + GSTDVDSPU_UNLOCK (dvdspu); + + res = gst_pad_event_default (pad, event); + break; + } + case GST_EVENT_FLUSH_START: + res = gst_pad_event_default (pad, event); + goto done; + case GST_EVENT_FLUSH_STOP: + res = gst_pad_event_default (pad, event); + + GSTDVDSPU_LOCK (dvdspu); + gst_segment_init (&dvdspu->video_seg, GST_FORMAT_UNDEFINED); + gst_buffer_replace (&dvdspu->ref_frame, NULL); + gst_buffer_replace (&dvdspu->pending_frame, NULL); + + GSTDVDSPU_UNLOCK (dvdspu); + goto done; + default: + res = gst_pad_event_default (pad, event); + break; + } + +done: + gst_object_unref (dvdspu); + return res; +#if 0 +error: + gst_event_unref (event); + return FALSE; +#endif +} + +static GstFlowReturn +dvdspu_video_chain (GstPad * pad, GstBuffer * buf) +{ + GstDVDSpu *dvdspu = (GstDVDSpu *) (gst_object_get_parent (GST_OBJECT (pad))); + GstFlowReturn ret; + + g_return_val_if_fail (dvdspu != NULL, GST_FLOW_ERROR); + + GST_LOG_OBJECT (dvdspu, "video buffer %p with TS %" GST_TIME_FORMAT, + buf, GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf))); + + ret = dvspu_handle_vid_buffer (dvdspu, buf); + + gst_object_unref (dvdspu); + + return ret; +} + +static GstFlowReturn +dvspu_handle_vid_buffer (GstDVDSpu * dvdspu, GstBuffer * buf) +{ + GstClockTime new_ts; + GstFlowReturn ret; + gboolean using_ref = FALSE; + + GSTDVDSPU_LOCK (dvdspu); + + if (buf == NULL) { + GstClockTime next_ts = dvdspu->video_seg.last_stop; + + next_ts += gst_util_uint64_scale_int (GST_SECOND, + dvdspu->spu_state.fps_d, dvdspu->spu_state.fps_n); + + /* NULL buffer was passed - use the reference frame and update the timestamp, + * or else there's nothing to draw, and just return GST_FLOW_OK */ + if (dvdspu->ref_frame == NULL) { + gst_segment_set_last_stop (&dvdspu->video_seg, GST_FORMAT_TIME, next_ts); + goto no_ref_frame; + } + + buf = gst_buffer_copy (dvdspu->ref_frame); + +#if 0 + g_print ("Duping frame %" GST_TIME_FORMAT " with new TS %" GST_TIME_FORMAT + "\n", GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)), + GST_TIME_ARGS (next_ts)); +#endif + + GST_BUFFER_TIMESTAMP (buf) = next_ts; + using_ref = TRUE; + } + + if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) { + gst_segment_set_last_stop (&dvdspu->video_seg, GST_FORMAT_TIME, + GST_BUFFER_TIMESTAMP (buf)); + } + + new_ts = gst_segment_to_running_time (&dvdspu->video_seg, GST_FORMAT_TIME, + dvdspu->video_seg.last_stop); + +#if 0 + g_print ("TS %" GST_TIME_FORMAT " running: %" GST_TIME_FORMAT "\n", + GST_TIME_ARGS (dvdspu->video_seg.last_stop), GST_TIME_ARGS (new_ts)); +#endif + + dvdspu_advance_spu (dvdspu, new_ts); + + /* If we have an active SPU command set, we store a copy of the frame in case + * we hit a still and need to draw on it. Otherwise, a reference is + * sufficient in case we later encounter a still */ + if ((dvdspu->spu_state.flags & SPU_STATE_FORCED_DSP) || + ((dvdspu->spu_state.flags & SPU_STATE_FORCED_ONLY) == 0 && + (dvdspu->spu_state.flags & SPU_STATE_DISPLAY))) { + if (using_ref == FALSE) { + GstBuffer *copy; + + /* Take a copy in case we hit a still frame and need the pristine + * frame around */ + copy = gst_buffer_copy (buf); + gst_buffer_replace (&dvdspu->ref_frame, copy); + gst_buffer_unref (copy); + } + + /* Render the SPU overlay onto the buffer */ + buf = gst_buffer_make_writable (buf); + + gstdvdspu_render_spu (dvdspu, buf); + } else { + if (using_ref == FALSE) { + /* Not going to draw anything on this frame, just store a reference + * in case we hit a still frame and need it */ + gst_buffer_replace (&dvdspu->ref_frame, buf); + } + } + + if (dvdspu->spu_state.flags & SPU_STATE_STILL_FRAME) { + GST_DEBUG_OBJECT (dvdspu, "Outputting buffer with TS %" GST_TIME_FORMAT + "from chain while in still", + GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf))); + } + + GSTDVDSPU_UNLOCK (dvdspu); + + /* just push out the incoming buffer without touching it */ + ret = gst_pad_push (dvdspu->srcpad, buf); + + return ret; + +no_ref_frame: + + GSTDVDSPU_UNLOCK (dvdspu); + + return GST_FLOW_OK; +} + +/* With SPU LOCK */ +static void +dvdspu_redraw_still (GstDVDSpu * dvdspu) +{ + /* If we have an active SPU command set and a reference frame, copy the + * frame, redraw the SPU and store it as the pending frame for output */ + if (dvdspu->ref_frame) { + if ((dvdspu->spu_state.flags & SPU_STATE_FORCED_DSP) || + ((dvdspu->spu_state.flags & SPU_STATE_FORCED_ONLY) == 0 && + (dvdspu->spu_state.flags & SPU_STATE_DISPLAY))) { + GstBuffer *buf = gst_buffer_copy (dvdspu->ref_frame); + + buf = gst_buffer_make_writable (buf); + + GST_LOG_OBJECT (dvdspu, "Redraw due to Still Frame with ref %p", + dvdspu->ref_frame); + GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT); + GST_BUFFER_TIMESTAMP (buf) = GST_CLOCK_TIME_NONE; + GST_BUFFER_DURATION (buf) = GST_CLOCK_TIME_NONE; + + /* Render the SPU overlay onto the buffer */ + gstdvdspu_render_spu (dvdspu, buf); + gst_buffer_replace (&dvdspu->pending_frame, buf); + } else { + GST_LOG_OBJECT (dvdspu, + "Redraw due to Still Frame skipped - no SPU to draw"); + } + } else { + GST_LOG_OBJECT (dvdspu, "Not redrawing still frame - no ref frame"); + } +} + +static void +gstdvdspu_parse_chg_colcon (GstDVDSpu * dvdspu, guint8 * data, guint8 * end) +{ + SpuState *state = &dvdspu->spu_state; + guint8 *cur; + gint16 n_entries; + gint16 i; + + /* Clear any existing chg colcon info */ + state->n_line_ctrl_i = 0; + if (state->line_ctrl_i != NULL) { + g_free (state->line_ctrl_i); + state->line_ctrl_i = NULL; + } + GST_DEBUG_OBJECT (dvdspu, "Change Color & Contrast. Pixel data = %d bytes", + (gint16) (end - data)); + + /* Count the number of entries we'll need */ + n_entries = 0; + for (cur = data; cur < end;) { + guint8 n_changes; + guint32 code; + + if (cur + 4 > end) + break; + + code = GST_READ_UINT32_BE (cur); + if (code == 0x0fffffff) + break; /* Termination code */ + + n_changes = CLAMP ((cur[2] >> 4), 1, 8); + cur += 4 + (6 * n_changes); + + if (cur > end) + break; /* Invalid entry overrunning buffer */ + + n_entries++; + } + + state->n_line_ctrl_i = n_entries; + state->line_ctrl_i = g_new (SpuLineCtrlI, n_entries); + + cur = data; + for (i = 0; i < n_entries; i++) { + SpuLineCtrlI *cur_line_ctrl = state->line_ctrl_i + i; + guint8 n_changes = CLAMP ((cur[2] >> 4), 1, 8); + guint8 c; + + cur_line_ctrl->n_changes = n_changes; + cur_line_ctrl->top = ((cur[0] << 8) & 0x300) | cur[1]; + cur_line_ctrl->bottom = ((cur[2] << 8) & 0x300) | cur[3]; + + GST_LOG_OBJECT (dvdspu, "ChgColcon Entry %d Top: %d Bottom: %d Changes: %d", + i, cur_line_ctrl->top, cur_line_ctrl->bottom, n_changes); + cur += 4; + + for (c = 0; c < n_changes; c++) { + SpuPixCtrlI *cur_pix_ctrl = cur_line_ctrl->pix_ctrl_i + c; + + cur_pix_ctrl->left = ((cur[0] << 8) & 0x300) | cur[1]; + cur_pix_ctrl->palette = GST_READ_UINT32_BE (cur + 2); + GST_LOG_OBJECT (dvdspu, " %d: left: %d palette 0x%x", c, + cur_pix_ctrl->left, cur_pix_ctrl->palette); + cur += 6; + } + } +} + +static void +dvdspu_exec_cmd_blk (GstDVDSpu * dvdspu, guint8 * data, guint8 * end) +{ + SpuState *state = &dvdspu->spu_state; + + while (data < end) { + guint8 cmd; + + cmd = data[0]; + + switch (cmd) { + case SPU_CMD_FSTA_DSP: + GST_DEBUG_OBJECT (dvdspu, " Forced Display"); + state->flags |= SPU_STATE_FORCED_DSP; + data += 1; + break; + case SPU_CMD_DSP: + GST_DEBUG_OBJECT (dvdspu, " Display On"); + state->flags |= SPU_STATE_DISPLAY; + data += 1; + break; + case SPU_CMD_STP_DSP: + GST_DEBUG_OBJECT (dvdspu, " Display Off"); + state->flags &= ~(SPU_STATE_FORCED_DSP | SPU_STATE_DISPLAY); + data += 1; + break; + case SPU_CMD_SET_COLOR:{ + if (G_UNLIKELY (data + 3 >= end)) + return; /* Invalid SET_COLOR cmd at the end of the blk */ + + state->main_idx[3] = data[1] >> 4; + state->main_idx[2] = data[1] & 0x0f; + state->main_idx[1] = data[2] >> 4; + state->main_idx[0] = data[2] & 0x0f; + + state->main_pal_dirty = TRUE; + + GST_DEBUG_OBJECT (dvdspu, + " Set Color bg %u pattern %u emph-1 %u emph-2 %u", + state->main_idx[0], state->main_idx[1], state->main_idx[2], + state->main_idx[3]); + data += 3; + break; + } + case SPU_CMD_SET_ALPHA:{ + if (G_UNLIKELY (data + 3 >= end)) + return; /* Invalid SET_ALPHA cmd at the end of the blk */ + + state->main_alpha[3] = data[1] >> 4; + state->main_alpha[2] = data[1] & 0x0f; + state->main_alpha[1] = data[2] >> 4; + state->main_alpha[0] = data[2] & 0x0f; + + state->main_pal_dirty = TRUE; + + GST_DEBUG_OBJECT (dvdspu, + " Set Alpha bg %u pattern %u emph-1 %u emph-2 %u", + state->main_alpha[0], state->main_alpha[1], state->main_alpha[2], + state->main_alpha[3]); + data += 3; + break; + } + case SPU_CMD_SET_DAREA:{ + SpuRect *r = &state->disp_rect; + + if (G_UNLIKELY (data + 7 >= end)) + return; /* Invalid SET_DAREA cmd at the end of the blk */ + + r->top = ((data[4] & 0x3f) << 4) | ((data[5] & 0xe0) >> 4); + r->left = ((data[1] & 0x3f) << 4) | ((data[2] & 0xf0) >> 4); + r->right = ((data[2] & 0x03) << 8) | data[3]; + r->bottom = ((data[5] & 0x03) << 8) | data[6]; + + GST_DEBUG_OBJECT (dvdspu, + " Set Display Area top %u left %u bottom %u right %u", r->top, + r->left, r->bottom, r->right); + + data += 7; + break; + } + case SPU_CMD_DSPXA:{ + if (G_UNLIKELY (data + 5 >= end)) + return; /* Invalid SET_DSPXE cmd at the end of the blk */ + + state->pix_data[0] = GST_READ_UINT16_BE (data + 1); + state->pix_data[1] = GST_READ_UINT16_BE (data + 3); + /* Store a reference to the current command buffer, as that's where + * we'll need to take our pixel data from */ + gst_buffer_replace (&state->pix_buf, state->buf); + + GST_DEBUG_OBJECT (dvdspu, " Set Pixel Data Offsets top: %u bot: %u", + state->pix_data[0], state->pix_data[1]); + + data += 5; + break; + } + case SPU_CMD_CHG_COLCON:{ + guint16 field_size; + + GST_DEBUG_OBJECT (dvdspu, " Set Color & Contrast Change"); + if (G_UNLIKELY (data + 3 >= end)) + return; /* Invalid CHG_COLCON cmd at the end of the blk */ + + data++; + field_size = GST_READ_UINT16_BE (data); + + if (G_UNLIKELY (data + field_size >= end)) + return; /* Invalid CHG_COLCON cmd at the end of the blk */ + + gstdvdspu_parse_chg_colcon (dvdspu, data + 2, data + field_size); + state->line_ctrl_i_pal_dirty = TRUE; + data += field_size; + break; + } + case SPU_CMD_END: + default: + GST_DEBUG_OBJECT (dvdspu, " END"); + data = end; + break; + } + } +} + +static void +dvdspu_finish_spu_buf (GstDVDSpu * dvdspu) +{ + SpuState *state = &dvdspu->spu_state; + + state->next_ts = state->base_ts = GST_CLOCK_TIME_NONE; + gst_buffer_replace (&state->buf, NULL); + + GST_DEBUG_OBJECT (dvdspu, "Finished SPU buffer"); +} + +static gboolean +dvdspu_setup_cmd_blk (GstDVDSpu * dvdspu, guint16 cmd_blk_offset, + guint8 * start, guint8 * end) +{ + SpuState *state = &dvdspu->spu_state; + guint16 delay; + guint8 *cmd_blk = start + cmd_blk_offset; + + if (G_UNLIKELY (cmd_blk + 5 >= end)) + return FALSE; /* No valid command block to read */ + + delay = GST_READ_UINT16_BE (cmd_blk); + state->next_ts = state->base_ts + STM_TO_GST (delay); + state->cur_cmd_blk = cmd_blk_offset; + + GST_DEBUG_OBJECT (dvdspu, "Setup CMD Block @ %u with TS %" GST_TIME_FORMAT, + state->cur_cmd_blk, GST_TIME_ARGS (state->next_ts)); + return TRUE; +} + +static void +dvdspu_handle_new_spu_buf (GstDVDSpu * dvdspu, SpuPacket * packet) +{ + guint8 *start, *end; + SpuState *state = &dvdspu->spu_state; + + if (G_UNLIKELY (GST_BUFFER_SIZE (packet->buf) < 4)) + goto invalid; + + if (state->buf != NULL) { + gst_buffer_unref (state->buf); + state->buf = NULL; + } + state->buf = packet->buf; + state->base_ts = packet->event_ts; + + start = GST_BUFFER_DATA (state->buf); + end = start + GST_BUFFER_SIZE (state->buf); + + /* Configure the first command block in this buffer as our initial blk */ + state->cur_cmd_blk = GST_READ_UINT16_BE (start + 2); + dvdspu_setup_cmd_blk (dvdspu, state->cur_cmd_blk, start, end); + /* Clear existing chg-colcon info */ + if (state->line_ctrl_i != NULL) { + g_free (state->line_ctrl_i); + state->line_ctrl_i = NULL; + } + return; + +invalid: + /* Invalid buffer */ + dvdspu_finish_spu_buf (dvdspu); +} + +static void +dvdspu_handle_dvd_event (GstDVDSpu * dvdspu, GstEvent * event) +{ + const gchar *event_type; + const GstStructure *structure = gst_event_get_structure (event); + SpuState *state = &dvdspu->spu_state; + gboolean hl_change = FALSE; + + event_type = gst_structure_get_string (structure, "event"); + GST_INFO_OBJECT (dvdspu, "DVD event of type %s on subp pad OOB=%d", + event_type, (GST_EVENT_TYPE (event) == GST_EVENT_CUSTOM_DOWNSTREAM_OOB)); + + if (strcmp (event_type, "dvd-spu-clut-change") == 0) { + gchar prop_name[32]; + gint i; + gint entry; + + for (i = 0; i < 16; i++) { + g_snprintf (prop_name, 32, "clut%02d", i); + if (!gst_structure_get_int (structure, prop_name, &entry)) + entry = 0; + state->current_clut[i] = (guint32) entry; + } + + state->main_pal_dirty = TRUE; + state->hl_pal_dirty = TRUE; + state->line_ctrl_i_pal_dirty = TRUE; + hl_change = TRUE; + } else if (strcmp (event_type, "dvd-spu-highlight") == 0) { + gint val; + + if (gst_structure_get_int (structure, "palette", &val)) { + state->hl_idx[3] = ((guint32) (val) >> 28) & 0x0f; + state->hl_idx[2] = ((guint32) (val) >> 24) & 0x0f; + state->hl_idx[1] = ((guint32) (val) >> 20) & 0x0f; + state->hl_idx[0] = ((guint32) (val) >> 16) & 0x0f; + + state->hl_alpha[3] = ((guint32) (val) >> 12) & 0x0f; + state->hl_alpha[2] = ((guint32) (val) >> 8) & 0x0f; + state->hl_alpha[1] = ((guint32) (val) >> 4) & 0x0f; + state->hl_alpha[0] = ((guint32) (val) >> 0) & 0x0f; + + state->hl_pal_dirty = TRUE; + } + if (gst_structure_get_int (structure, "sx", &val)) + state->hl_rect.left = (gint16) val; + if (gst_structure_get_int (structure, "sy", &val)) + state->hl_rect.top = (gint16) val; + if (gst_structure_get_int (structure, "ex", &val)) + state->hl_rect.right = (gint16) val; + if (gst_structure_get_int (structure, "ey", &val)) + state->hl_rect.bottom = (gint16) val; + + GST_INFO_OBJECT (dvdspu, "Highlight rect is now (%d,%d) to (%d,%d)", + state->hl_rect.left, state->hl_rect.top, + state->hl_rect.right, state->hl_rect.bottom); + hl_change = TRUE; + } else if (strcmp (event_type, "dvd-spu-reset-highlight") == 0) { + if (state->hl_rect.top != -1 || state->hl_rect.bottom != -1) + hl_change = TRUE; + state->hl_rect.top = -1; + state->hl_rect.bottom = -1; + GST_INFO_OBJECT (dvdspu, "Highlight off"); + } else if (strcmp (event_type, "dvd-set-subpicture-track") == 0) { + gboolean forced_only; + + if (gst_structure_get_boolean (structure, "forced-only", &forced_only)) { + gboolean was_forced = (state->flags & SPU_STATE_FORCED_ONLY); + + if (forced_only) + state->flags |= SPU_STATE_FORCED_ONLY; + else + state->flags &= ~(SPU_STATE_FORCED_ONLY); + + if ((was_forced && !forced_only) || (!was_forced && forced_only)) + hl_change = TRUE; + } + } + + if (hl_change && (state->flags & SPU_STATE_STILL_FRAME)) { + dvdspu_redraw_still (dvdspu); + } + + gst_event_unref (event); +} + +#if 0 +static void +dvdspu_dump_dcsq (GstDVDSpu * dvdspu, + GstClockTime start_ts, GstBuffer * spu_buf) +{ + guint16 cmd_blk_offset; + guint16 next_blk; + guint8 *start, *end; + + start = GST_BUFFER_DATA (spu_buf); + end = start + GST_BUFFER_SIZE (spu_buf); + + g_return_if_fail (start != NULL); + + /* First command */ + next_blk = GST_READ_UINT16_BE (start + 2); + cmd_blk_offset = 0; + + /* Loop through all commands */ + g_print ("SPU begins @ %" GST_TIME_FORMAT " offset %u\n", + GST_TIME_ARGS (start_ts), next_blk); + + while (cmd_blk_offset != next_blk) { + guint8 *data; + GstClockTime cmd_blk_ts; + + cmd_blk_offset = next_blk; + + if (G_UNLIKELY (start + cmd_blk_offset + 5 >= end)) + break; /* No valid command to read */ + + data = start + cmd_blk_offset; + + cmd_blk_ts = start_ts + STM_TO_GST (GST_READ_UINT16_BE (data)); + next_blk = GST_READ_UINT16_BE (data + 2); + + g_print ("Cmd Blk @ offset %u next %u ts %" GST_TIME_FORMAT "\n", + cmd_blk_offset, next_blk, GST_TIME_ARGS (cmd_blk_ts)); + + data += 4; + dvdspu_exec_cmd_blk (dvdspu, data, end); + } +} +#endif + +/* Advance the SPU packet/command queue to a time. new_ts is in running time */ +static void +dvdspu_advance_spu (GstDVDSpu * dvdspu, GstClockTime new_ts) +{ + SpuState *state = &dvdspu->spu_state; + + while (state->next_ts == GST_CLOCK_TIME_NONE || state->next_ts <= new_ts) { + guint8 *start, *cmd_blk, *end; + guint16 next_blk; + + if (state->buf == NULL) { + GstClockTime vid_run_ts; + + /* No current command buffer, try and get one */ + SpuPacket *packet = (SpuPacket *) g_queue_pop_head (dvdspu->pending_spus); + + if (packet == NULL) + return; /* No SPU packets available */ + + vid_run_ts = + gst_segment_to_running_time (&dvdspu->video_seg, GST_FORMAT_TIME, + dvdspu->video_seg.last_stop); + GST_LOG_OBJECT (dvdspu, + "Popped new SPU packet with TS %" GST_TIME_FORMAT + ". Video last_stop=%" GST_TIME_FORMAT " (%" GST_TIME_FORMAT ")", + GST_TIME_ARGS (packet->event_ts), GST_TIME_ARGS (vid_run_ts), + GST_TIME_ARGS (dvdspu->video_seg.last_stop)); + + if (packet->buf) { + // dvdspu_dump_dcsq (dvdspu, packet->event_ts, packet->buf); + dvdspu_handle_new_spu_buf (dvdspu, packet); + } + if (packet->event) + dvdspu_handle_dvd_event (dvdspu, packet->event); + + g_free (packet); + continue; + } + + GST_DEBUG_OBJECT (dvdspu, + "Advancing SPU from TS %" GST_TIME_FORMAT " to %" GST_TIME_FORMAT, + GST_TIME_ARGS (state->next_ts), GST_TIME_ARGS (new_ts)); + + /* If we get here, we have an SPU buffer, and it's time to process the + * next cmd */ + g_assert (state->buf != NULL && state->next_ts <= new_ts); + + GST_DEBUG_OBJECT (dvdspu, "Executing cmd blk with TS %" GST_TIME_FORMAT + " @ offset %u", GST_TIME_ARGS (state->next_ts), state->cur_cmd_blk); + + start = GST_BUFFER_DATA (state->buf); + end = start + GST_BUFFER_SIZE (state->buf); + + cmd_blk = start + state->cur_cmd_blk; + + if (G_UNLIKELY (cmd_blk + 5 >= end)) { + /* Invalid. Finish the buffer and loop again */ + dvdspu_finish_spu_buf (dvdspu); + continue; + } + + dvdspu_exec_cmd_blk (dvdspu, cmd_blk + 4, end); + + next_blk = GST_READ_UINT16_BE (cmd_blk + 2); + if (next_blk != state->cur_cmd_blk) { + /* Advance to the next block of commands */ + dvdspu_setup_cmd_blk (dvdspu, next_blk, start, end); + } else { + /* Next Block points to the current block, so we're finished with this + * SPU buffer */ + dvdspu_finish_spu_buf (dvdspu); + } + } +} + +static void +dvdspu_check_still_updates (GstDVDSpu * dvdspu) +{ + GstClockTime sub_ts; + GstClockTime vid_ts; + + if (dvdspu->spu_state.flags & SPU_STATE_STILL_FRAME) { + + vid_ts = gst_segment_to_running_time (&dvdspu->video_seg, + GST_FORMAT_TIME, dvdspu->video_seg.last_stop); + sub_ts = gst_segment_to_running_time (&dvdspu->subp_seg, + GST_FORMAT_TIME, dvdspu->subp_seg.last_stop); + + vid_ts = MAX (vid_ts, sub_ts); + + GST_DEBUG_OBJECT (dvdspu, + "In still frame - advancing TS to %" GST_TIME_FORMAT + " to process SPU buffer", GST_TIME_ARGS (vid_ts)); + dvdspu_advance_spu (dvdspu, vid_ts); + } +} + +static GstFlowReturn +dvdspu_subpic_chain (GstPad * pad, GstBuffer * buf) +{ + GstDVDSpu *dvdspu = (GstDVDSpu *) (gst_object_get_parent (GST_OBJECT (pad))); + + g_return_val_if_fail (dvdspu != NULL, GST_FLOW_ERROR); + + GST_INFO_OBJECT (dvdspu, "Have subpicture buffer with timestamp %" + GST_TIME_FORMAT " and size %u", + GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)), GST_BUFFER_SIZE (buf)); + + GSTDVDSPU_LOCK (dvdspu); + + if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) { + gst_segment_set_last_stop (&dvdspu->subp_seg, GST_FORMAT_TIME, + GST_BUFFER_TIMESTAMP (buf)); + } + + if (dvdspu->partial_spu != NULL) { + dvdspu->partial_spu = gst_buffer_join (dvdspu->partial_spu, buf); + } else { + /* If we don't yet have a buffer, wait for one with a timestamp, + * since that will avoid collecting the 2nd half of a partial buf */ + if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) + dvdspu->partial_spu = buf; + else + gst_buffer_unref (buf); + } + + if (dvdspu->partial_spu != NULL && GST_BUFFER_SIZE (dvdspu->partial_spu) > 4) { + guint16 packet_size; + guint8 *data; + + data = GST_BUFFER_DATA (dvdspu->partial_spu); + packet_size = GST_READ_UINT16_BE (data); + + if (packet_size == GST_BUFFER_SIZE (dvdspu->partial_spu)) { + SpuPacket *spu_packet; + GstClockTime ts; + GstClockTime run_ts = GST_CLOCK_TIME_NONE; + + GST_DEBUG_OBJECT (dvdspu, + "Complete subpicture buffer of %u bytes with TS %" GST_TIME_FORMAT, + GST_BUFFER_SIZE (dvdspu->partial_spu), + GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (dvdspu->partial_spu))); + + /* Decide whether to pass this buffer through to the rendering code */ + ts = GST_BUFFER_TIMESTAMP (dvdspu->partial_spu); + if (GST_CLOCK_TIME_IS_VALID (ts)) { + if (ts < (GstClockTime) dvdspu->subp_seg.start) { + GstClockTimeDiff diff = dvdspu->subp_seg.start - ts; + + /* Buffer starts before segment, see if we can calculate a running time */ + run_ts = + gst_segment_to_running_time (&dvdspu->subp_seg, GST_FORMAT_TIME, + dvdspu->subp_seg.start); + if (run_ts >= (GstClockTime) diff) + run_ts -= diff; + else + run_ts = GST_CLOCK_TIME_NONE; /* No running time possible for this subpic */ + } else { + /* TS within segment, convert to running time */ + run_ts = + gst_segment_to_running_time (&dvdspu->subp_seg, GST_FORMAT_TIME, + ts); + } + } + + if (GST_CLOCK_TIME_IS_VALID (run_ts)) { + /* Complete SPU packet, push it onto the queue for processing when + * video packets come past */ + spu_packet = g_new0 (SpuPacket, 1); + spu_packet->buf = dvdspu->partial_spu; + + /* Store the activation time of this buffer in running time */ + spu_packet->event_ts = + gst_segment_to_running_time (&dvdspu->subp_seg, GST_FORMAT_TIME, + ts); + GST_INFO_OBJECT (dvdspu, + "Pushing SPU buf with TS %" GST_TIME_FORMAT " running time %" + GST_TIME_FORMAT, GST_TIME_ARGS (ts), + GST_TIME_ARGS (spu_packet->event_ts)); + + g_queue_push_tail (dvdspu->pending_spus, spu_packet); + dvdspu->partial_spu = NULL; + + /* In a still frame condition, advance the SPU to make sure the state is + * up to date */ + dvdspu_check_still_updates (dvdspu); + } else { + gst_buffer_unref (dvdspu->partial_spu); + dvdspu->partial_spu = NULL; + } + } else if (packet_size < GST_BUFFER_SIZE (dvdspu->partial_spu)) { + /* Somehow we collected too much - something is wrong. Drop the + * packet entirely and wait for a new one */ + GST_DEBUG_OBJECT (dvdspu, "Discarding invalid SPU buffer of size %u", + GST_BUFFER_SIZE (dvdspu->partial_spu)); + + gst_buffer_unref (dvdspu->partial_spu); + dvdspu->partial_spu = NULL; + } + } + + GSTDVDSPU_UNLOCK (dvdspu); + + gst_object_unref (dvdspu); + return GST_FLOW_OK; +} + +static gboolean +dvdspu_subpic_event (GstPad * pad, GstEvent * event) +{ + GstDVDSpu *dvdspu = (GstDVDSpu *) (gst_object_get_parent (GST_OBJECT (pad))); + gboolean res = TRUE; + + g_return_val_if_fail (dvdspu != NULL, FALSE); + + /* Some events on the subpicture sink pad just get ignored, like + * FLUSH_START */ + switch (GST_EVENT_TYPE (event)) { + case GST_EVENT_CUSTOM_DOWNSTREAM: + case GST_EVENT_CUSTOM_DOWNSTREAM_OOB: + { + const GstStructure *structure = gst_event_get_structure (event); + gboolean need_push; + + if (!gst_structure_has_name (structure, "application/x-gst-dvd")) { + res = gst_pad_event_default (pad, event); + break; + } + + GSTDVDSPU_LOCK (dvdspu); + if (GST_EVENT_IS_SERIALIZED (event)) { + SpuPacket *spu_packet = g_new0 (SpuPacket, 1); + + spu_packet->event = event; + g_queue_push_tail (dvdspu->pending_spus, spu_packet); + } else { + dvdspu_handle_dvd_event (dvdspu, event); + } + + /* If the handle_dvd_event generated a pending frame, we + * need to synchronise with the video pad's stream lock and push it. + * This requires some dancing to preserve locking order and handle + * flushes correctly */ + need_push = (dvdspu->pending_frame != NULL); + GSTDVDSPU_UNLOCK (dvdspu); + if (need_push) { + GstBuffer *to_push = NULL; + gboolean flushing; + + GST_LOG_OBJECT (dvdspu, "Going for stream lock"); + GST_PAD_STREAM_LOCK (dvdspu->videosinkpad); + GST_LOG_OBJECT (dvdspu, "Got stream lock"); + GST_OBJECT_LOCK (dvdspu->videosinkpad); + flushing = GST_PAD_IS_FLUSHING (dvdspu->videosinkpad); + GST_OBJECT_UNLOCK (dvdspu->videosinkpad); + + GSTDVDSPU_LOCK (dvdspu); + if (dvdspu->pending_frame == NULL || flushing) { + /* Got flushed while waiting for the stream lock */ + GSTDVDSPU_UNLOCK (dvdspu); + } else { + to_push = dvdspu->pending_frame; + dvdspu->pending_frame = NULL; + + GSTDVDSPU_UNLOCK (dvdspu); + gst_pad_push (dvdspu->srcpad, to_push); + } + GST_LOG_OBJECT (dvdspu, "Dropping stream lock"); + GST_PAD_STREAM_UNLOCK (dvdspu->videosinkpad); + } + + break; + } + case GST_EVENT_NEWSEGMENT: + { + gboolean update; + gdouble rate; + GstFormat format; + gint64 start, stop, time; + gdouble arate; + + gst_event_parse_new_segment_full (event, &update, &rate, &arate, &format, + &start, &stop, &time); + + /* Only print updates if they have an end time (don't print start_time + * updates */ + GST_DEBUG_OBJECT (dvdspu, "subpic pad NewSegment:" + " Update %d, rate %g arate %g format %d start %" GST_TIME_FORMAT + " %" GST_TIME_FORMAT " position %" GST_TIME_FORMAT, + update, rate, arate, format, GST_TIME_ARGS (start), + GST_TIME_ARGS (stop), GST_TIME_ARGS (time)); + + GSTDVDSPU_LOCK (dvdspu); + gst_segment_set_newsegment_full (&dvdspu->subp_seg, update, rate, arate, + format, start, stop, time); + GSTDVDSPU_UNLOCK (dvdspu); + + gst_event_unref (event); + break; + } + case GST_EVENT_FLUSH_START: + gst_event_unref (event); + goto done; + case GST_EVENT_FLUSH_STOP: + GSTDVDSPU_LOCK (dvdspu); + dvdspu_flush_spu_info (dvdspu); + GSTDVDSPU_UNLOCK (dvdspu); + + /* We don't forward flushes on the spu pad */ + gst_event_unref (event); + goto done; + default: + res = gst_pad_event_default (pad, event); + break; + } + +done: + gst_object_unref (dvdspu); + + return res; +} + +static GstStateChangeReturn +dvdspu_change_state (GstElement * element, GstStateChange transition) +{ + GstDVDSpu *dvdspu = (GstDVDSpu *) element; + GstStateChangeReturn ret; + + ret = parent_class->change_state (element, transition); + + switch (transition) { + case GST_STATE_CHANGE_PAUSED_TO_READY: + GSTDVDSPU_LOCK (dvdspu); + dvdspu_clear (dvdspu); + GSTDVDSPU_UNLOCK (dvdspu); + break; + default: + break; + } + + return ret; +} + +gboolean +gstdvdspu_plugin_init (GstPlugin * plugin) +{ + GST_DEBUG_CATEGORY_INIT (dvdspu_debug, "gstdvdspu", + 0, "DVD Sub-picture Overlay decoder/renderer"); + + return gst_element_register (plugin, "dvdspu", + GST_RANK_NONE, GST_TYPE_GSTDVDSPU); +} + +GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, + GST_VERSION_MINOR, + "dvdspu", + "DVD Sub-picture Overlay element", + gstdvdspu_plugin_init, + VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN) diff --git a/gst/dvdspu/gstdvdspu.h b/gst/dvdspu/gstdvdspu.h new file mode 100644 index 000000000..46923a585 --- /dev/null +++ b/gst/dvdspu/gstdvdspu.h @@ -0,0 +1,226 @@ +/* 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. + */ +#ifndef __GSTDVDSPU_H__ +#define __GSTDVDSPU_H__ + +#include <gst/gst.h> + +G_BEGIN_DECLS + +#define GST_TYPE_GSTDVDSPU \ + (dvdspu_get_type()) +#define GSTDVDSPU(obj) \ + (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_GSTDVDSPU,GstDVDSpu)) +#define GSTDVDSPU_CLASS(klass) \ + (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_GSTDVDSPU,GstDVDSpuClass)) +#define GST_IS_PLUGIN_TEMPLATE(obj) \ + (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_GSTDVDSPU)) +#define GST_IS_PLUGIN_TEMPLATE_CLASS(klass) \ + (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_GSTDVDSPU)) + +#define GSTDVDSPU_LOCK(s) g_mutex_lock ((s)->spu_lock); +#define GSTDVDSPU_UNLOCK(s) g_mutex_unlock ((s)->spu_lock); + +typedef struct GstDVDSpu GstDVDSpu; +typedef struct GstDVDSpuClass GstDVDSpuClass; +typedef struct SpuRect SpuRect; +typedef struct SpuPixCtrlI SpuPixCtrlI; +typedef struct SpuLineCtrlI SpuLineCtrlI; +typedef struct SpuColour SpuColour; +typedef enum SpuStateFlags SpuStateFlags; +typedef struct SpuState SpuState; +typedef struct SpuPacket SpuPacket; + +typedef enum SpuCmd SpuCmd; + +/* Describe the limits of a rectangle */ +struct SpuRect { + gint16 left; + gint16 top; + gint16 right; + gint16 bottom; +}; + +/* Store a pre-multiplied colour value. The YUV fields hold the YUV values + * multiplied by the 8-bit alpha, to save computing it while rendering */ +struct SpuColour { + guint16 Y; + guint16 U; + guint16 V; + guint8 A; +}; + +/* Pixel Control Info from a Change Color Contrast command */ +struct SpuPixCtrlI { + gint16 left; + guint32 palette; + + /* Pre-multiplied palette values, updated as + * needed */ + SpuColour pal_cache[4]; +}; + +struct SpuLineCtrlI { + guint8 n_changes; /* 1 to 8 */ + SpuPixCtrlI pix_ctrl_i[8]; + + gint16 top; + gint16 bottom; +}; + +enum SpuCmd { + SPU_CMD_FSTA_DSP = 0x00, /* Forced Display */ + SPU_CMD_DSP = 0x01, /* Display Start */ + SPU_CMD_STP_DSP = 0x02, /* Display Off */ + SPU_CMD_SET_COLOR = 0x03, /* Set the color indexes for the palette */ + SPU_CMD_SET_ALPHA = 0x04, /* Set the alpha indexes for the palette */ + SPU_CMD_SET_DAREA = 0x05, /* Set the display area for the SPU */ + SPU_CMD_DSPXA = 0x06, /* Pixel data addresses */ + SPU_CMD_CHG_COLCON = 0x07, /* Change Color & Contrast */ + SPU_CMD_END = 0xff +}; + +enum SpuStateFlags { + SPU_STATE_NONE = 0x00, + /* Flags cleared on a flush */ + SPU_STATE_DISPLAY = 0x01, + SPU_STATE_FORCED_DSP = 0x02, + SPU_STATE_STILL_FRAME = 0x04, + /* Persistent flags */ + SPU_STATE_FORCED_ONLY = 0x100 +}; + +#define SPU_STATE_FLAGS_MASK (0xff) + +struct SpuState { + GstClockTime next_ts; /* Next event TS in running time */ + + GstClockTime base_ts; /* base TS for cmd blk delays in running time */ + GstBuffer *buf; /* Current SPU packet we're executing commands from */ + guint16 cur_cmd_blk; /* Offset into the buf for the current cmd block */ + + SpuStateFlags flags; + + /* Top + Bottom field offsets in the buffer. 0 = not set */ + guint16 pix_data[2]; + GstBuffer *pix_buf; /* Current SPU packet the pix_data references */ + + SpuRect disp_rect; + SpuRect hl_rect; + + guint32 current_clut[16]; /* Colour lookup table from incoming events */ + + guint8 main_idx[4]; /* Indices for current main palette */ + guint8 main_alpha[4]; /* Alpha values for main palette */ + + guint8 hl_idx[4]; /* Indices for current highlight palette */ + guint8 hl_alpha[4]; /* Alpha values for highlight palette */ + + /* Pre-multiplied colour palette for the main palette */ + SpuColour main_pal[4]; + gboolean main_pal_dirty; + + /* Line control info for rendering the highlight palette */ + SpuLineCtrlI hl_ctrl_i; + gboolean hl_pal_dirty; /* Indicates that the HL palette info needs refreshing */ + + /* LineCtrlI Info from a Change Color & Contrast command */ + SpuLineCtrlI *line_ctrl_i; + gint16 n_line_ctrl_i; + gboolean line_ctrl_i_pal_dirty; /* Indicates that the palettes for the line_ctrl_i + * need recalculating */ + + /* Rendering state vars below */ + guint16 *comp_bufs[3]; /* Compositing buffers for U+V & A */ + gint16 comp_last_x[2]; /* Maximum X values we rendered into the comp buffer (odd & even) */ + gint16 *comp_last_x_ptr; /* Ptr to the current comp_last_x value to be updated by the render */ + gint16 vid_width, vid_height; + gint16 Y_stride, UV_stride; + gint16 Y_height, UV_height; + + gint fps_n, fps_d; + + /* Current Y Position */ + gint16 cur_Y; + + /* Current offset in nibbles into the pix_data */ + guint16 cur_offsets[2]; + guint16 max_offset; + + /* current ChgColCon Line Info */ + SpuLineCtrlI *cur_chg_col; + SpuLineCtrlI *cur_chg_col_end; + + /* Output position tracking */ + guint8 *out_Y; + guint16 *out_U; + guint16 *out_V; + guint16 *out_A; +}; + +/* Structure used to store the queue of pending SPU packets. The start_ts is + * stored in running time... + * Also used to carry in-band events so they remain serialised properly */ +struct SpuPacket { + GstClockTime event_ts; + GstBuffer *buf; + GstEvent *event; +}; + +struct GstDVDSpu +{ + GstElement element; + + GstPad *videosinkpad; + GstPad *subpic_sinkpad; + GstPad *srcpad; + + /* Mutex to protect state we access from different chain funcs */ + GMutex *spu_lock; + + GstSegment video_seg; + GstSegment subp_seg; + + SpuState spu_state; + + /* GQueue of SpuBuf structures */ + GQueue *pending_spus; + + /* Accumulator for collecting partial SPU buffers until they're complete */ + GstBuffer *partial_spu; + + /* Store either a reference or a copy of the last video frame for duplication + * during still-frame conditions */ + GstBuffer *ref_frame; + + /* Buffer to push after handling a DVD event, if any */ + GstBuffer *pending_frame; +}; + +struct GstDVDSpuClass +{ + GstElementClass parent_class; +}; + +GType gstdvdspu_get_type (void); +void gstdvdspu_render_spu (GstDVDSpu *dvdspu, GstBuffer *buf); + +G_END_DECLS + +#endif /* __GSTDVDSPU_H__ */ |