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524 lines
16 KiB
C
524 lines
16 KiB
C
/* GStreamer Sub-Picture Unit - VobSub/DVD handling
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* Copyright (C) 2009 Jan Schmidt <thaytan@noraisin.net>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <string.h>
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#include <gst/gst.h>
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#include "gstdvdspu.h"
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#include "gstspu-vobsub.h"
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GST_DEBUG_CATEGORY_EXTERN (dvdspu_debug);
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#define GST_CAT_DEFAULT dvdspu_debug
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/* Define to dump out a text description of the incoming SPU commands */
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#define DUMP_DCSQ 0
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/* Convert an STM offset in the SPU sequence to a GStreamer timestamp */
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#define STM_TO_GST(stm) ((GST_MSECOND * 1024 * (stm)) / 90)
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typedef enum SpuVobsubCmd SpuVobsubCmd;
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enum SpuVobsubCmd
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{
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SPU_CMD_FSTA_DSP = 0x00, /* Forced Display */
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SPU_CMD_DSP = 0x01, /* Display Start */
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SPU_CMD_STP_DSP = 0x02, /* Display Off */
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SPU_CMD_SET_COLOR = 0x03, /* Set the color indexes for the palette */
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SPU_CMD_SET_ALPHA = 0x04, /* Set the alpha indexes for the palette */
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SPU_CMD_SET_DAREA = 0x05, /* Set the display area for the SPU */
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SPU_CMD_DSPXA = 0x06, /* Pixel data addresses */
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SPU_CMD_CHG_COLCON = 0x07, /* Change Color & Contrast */
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SPU_CMD_END = 0xff
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};
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static void
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gst_dvd_spu_parse_chg_colcon (GstDVDSpu * dvdspu, guint8 * data, guint8 * end)
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{
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SpuState *state = &dvdspu->spu_state;
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guint8 *cur;
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gint16 n_entries;
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gint16 i;
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/* Clear any existing chg colcon info */
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state->vobsub.n_line_ctrl_i = 0;
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if (state->vobsub.line_ctrl_i != NULL) {
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g_free (state->vobsub.line_ctrl_i);
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state->vobsub.line_ctrl_i = NULL;
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}
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GST_DEBUG_OBJECT (dvdspu, "Change Color & Contrast. Pixel data = %d bytes",
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(gint16) (end - data));
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/* Count the number of entries we'll need */
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n_entries = 0;
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for (cur = data; cur < end;) {
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guint8 n_changes;
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guint32 code;
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if (cur + 4 > end)
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break;
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code = GST_READ_UINT32_BE (cur);
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if (code == 0x0fffffff)
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break; /* Termination code */
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n_changes = CLAMP ((cur[2] >> 4), 1, 8);
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cur += 4 + (6 * n_changes);
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if (cur > end)
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break; /* Invalid entry overrunning buffer */
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n_entries++;
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}
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state->vobsub.n_line_ctrl_i = n_entries;
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state->vobsub.line_ctrl_i = g_new (SpuVobsubLineCtrlI, n_entries);
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cur = data;
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for (i = 0; i < n_entries; i++) {
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SpuVobsubLineCtrlI *cur_line_ctrl = state->vobsub.line_ctrl_i + i;
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guint8 n_changes = CLAMP ((cur[2] >> 4), 1, 8);
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guint8 c;
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cur_line_ctrl->n_changes = n_changes;
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cur_line_ctrl->top = ((cur[0] << 8) & 0x300) | cur[1];
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cur_line_ctrl->bottom = ((cur[2] << 8) & 0x300) | cur[3];
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GST_LOG_OBJECT (dvdspu, "ChgColcon Entry %d Top: %d Bottom: %d Changes: %d",
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i, cur_line_ctrl->top, cur_line_ctrl->bottom, n_changes);
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cur += 4;
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for (c = 0; c < n_changes; c++) {
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SpuVobsubPixCtrlI *cur_pix_ctrl = cur_line_ctrl->pix_ctrl_i + c;
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cur_pix_ctrl->left = ((cur[0] << 8) & 0x300) | cur[1];
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cur_pix_ctrl->palette = GST_READ_UINT32_BE (cur + 2);
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GST_LOG_OBJECT (dvdspu, " %d: left: %d palette 0x%x", c,
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cur_pix_ctrl->left, cur_pix_ctrl->palette);
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cur += 6;
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}
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}
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}
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static void
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gst_dvd_spu_exec_cmd_blk (GstDVDSpu * dvdspu, guint8 * data, guint8 * end)
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{
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SpuState *state = &dvdspu->spu_state;
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while (data < end) {
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guint8 cmd;
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cmd = data[0];
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switch (cmd) {
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case SPU_CMD_FSTA_DSP:
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GST_DEBUG_OBJECT (dvdspu, " Forced Display");
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state->flags |= SPU_STATE_FORCED_DSP;
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data += 1;
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break;
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case SPU_CMD_DSP:
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GST_DEBUG_OBJECT (dvdspu, " Display On");
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state->flags |= SPU_STATE_DISPLAY;
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data += 1;
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break;
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case SPU_CMD_STP_DSP:
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GST_DEBUG_OBJECT (dvdspu, " Display Off");
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state->flags &= ~(SPU_STATE_FORCED_DSP | SPU_STATE_DISPLAY);
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data += 1;
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break;
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case SPU_CMD_SET_COLOR:{
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if (G_UNLIKELY (data + 3 >= end))
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return; /* Invalid SET_COLOR cmd at the end of the blk */
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state->vobsub.main_idx[3] = data[1] >> 4;
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state->vobsub.main_idx[2] = data[1] & 0x0f;
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state->vobsub.main_idx[1] = data[2] >> 4;
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state->vobsub.main_idx[0] = data[2] & 0x0f;
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state->vobsub.main_pal_dirty = TRUE;
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GST_DEBUG_OBJECT (dvdspu,
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" Set Color bg %u pattern %u emph-1 %u emph-2 %u",
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state->vobsub.main_idx[0], state->vobsub.main_idx[1],
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state->vobsub.main_idx[2], state->vobsub.main_idx[3]);
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data += 3;
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break;
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}
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case SPU_CMD_SET_ALPHA:{
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if (G_UNLIKELY (data + 3 >= end))
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return; /* Invalid SET_ALPHA cmd at the end of the blk */
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state->vobsub.main_alpha[3] = data[1] >> 4;
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state->vobsub.main_alpha[2] = data[1] & 0x0f;
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state->vobsub.main_alpha[1] = data[2] >> 4;
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state->vobsub.main_alpha[0] = data[2] & 0x0f;
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state->vobsub.main_pal_dirty = TRUE;
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GST_DEBUG_OBJECT (dvdspu,
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" Set Alpha bg %u pattern %u emph-1 %u emph-2 %u",
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state->vobsub.main_alpha[0], state->vobsub.main_alpha[1],
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state->vobsub.main_alpha[2], state->vobsub.main_alpha[3]);
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data += 3;
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break;
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}
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case SPU_CMD_SET_DAREA:{
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SpuRect *r = &state->vobsub.disp_rect;
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if (G_UNLIKELY (data + 7 >= end))
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return; /* Invalid SET_DAREA cmd at the end of the blk */
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r->top = ((data[4] & 0xff) << 4) | ((data[5] & 0xf0) >> 4);
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r->left = ((data[1] & 0xff) << 4) | ((data[2] & 0xf0) >> 4);
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r->right = ((data[2] & 0x0f) << 8) | data[3];
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r->bottom = ((data[5] & 0x0f) << 8) | data[6];
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GST_DEBUG_OBJECT (dvdspu,
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" Set Display Area top %u left %u bottom %u right %u", r->top,
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r->left, r->bottom, r->right);
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data += 7;
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break;
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}
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case SPU_CMD_DSPXA:{
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if (G_UNLIKELY (data + 5 >= end))
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return; /* Invalid SET_DSPXE cmd at the end of the blk */
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state->vobsub.pix_data[0] = GST_READ_UINT16_BE (data + 1);
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state->vobsub.pix_data[1] = GST_READ_UINT16_BE (data + 3);
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/* Store a reference to the current command buffer, as that's where
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* we'll need to take our pixel data from */
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gst_buffer_replace (&state->vobsub.pix_buf, state->vobsub.buf);
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GST_DEBUG_OBJECT (dvdspu, " Set Pixel Data Offsets top: %u bot: %u",
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state->vobsub.pix_data[0], state->vobsub.pix_data[1]);
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data += 5;
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break;
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}
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case SPU_CMD_CHG_COLCON:{
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guint16 field_size;
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GST_DEBUG_OBJECT (dvdspu, " Set Color & Contrast Change");
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if (G_UNLIKELY (data + 3 >= end))
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return; /* Invalid CHG_COLCON cmd at the end of the blk */
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data++;
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field_size = GST_READ_UINT16_BE (data);
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if (G_UNLIKELY (data + field_size >= end))
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return; /* Invalid CHG_COLCON cmd at the end of the blk */
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gst_dvd_spu_parse_chg_colcon (dvdspu, data + 2, data + field_size);
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state->vobsub.line_ctrl_i_pal_dirty = TRUE;
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data += field_size;
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break;
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}
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case SPU_CMD_END:
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default:
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GST_DEBUG_OBJECT (dvdspu, " END");
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data = end;
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break;
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}
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}
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}
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static void
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gst_dvd_spu_finish_spu_buf (GstDVDSpu * dvdspu)
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{
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SpuState *state = &dvdspu->spu_state;
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state->next_ts = state->vobsub.base_ts = GST_CLOCK_TIME_NONE;
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gst_buffer_replace (&state->vobsub.buf, NULL);
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GST_DEBUG_OBJECT (dvdspu, "Finished SPU buffer");
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}
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static gboolean
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gst_dvd_spu_setup_cmd_blk (GstDVDSpu * dvdspu, guint16 cmd_blk_offset,
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guint8 * start, guint8 * end)
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{
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SpuState *state = &dvdspu->spu_state;
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guint16 delay;
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guint8 *cmd_blk = start + cmd_blk_offset;
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if (G_UNLIKELY (cmd_blk + 5 >= end)) {
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GST_DEBUG_OBJECT (dvdspu, "No valid command block");
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return FALSE; /* No valid command block to read */
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}
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delay = GST_READ_UINT16_BE (cmd_blk);
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state->next_ts = state->vobsub.base_ts + STM_TO_GST (delay);
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state->vobsub.cur_cmd_blk = cmd_blk_offset;
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GST_DEBUG_OBJECT (dvdspu, "Setup CMD Block @ %u with TS %" GST_TIME_FORMAT,
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state->vobsub.cur_cmd_blk, GST_TIME_ARGS (state->next_ts));
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return TRUE;
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}
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#if DUMP_DCSQ
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static void
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gst_dvd_spu_dump_dcsq (GstDVDSpu * dvdspu,
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GstClockTime start_ts, GstBuffer * spu_buf)
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{
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guint16 cmd_blk_offset;
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guint16 next_blk;
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guint8 *start, *end;
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start = GST_BUFFER_DATA (spu_buf);
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end = start + GST_BUFFER_SIZE (spu_buf);
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g_return_if_fail (start != NULL);
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/* First command */
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next_blk = GST_READ_UINT16_BE (start + 2);
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cmd_blk_offset = 0;
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/* Loop through all commands */
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g_print ("SPU begins @ %" GST_TIME_FORMAT " offset %u\n",
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GST_TIME_ARGS (start_ts), next_blk);
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while (cmd_blk_offset != next_blk) {
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guint8 *data;
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GstClockTime cmd_blk_ts;
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cmd_blk_offset = next_blk;
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if (G_UNLIKELY (start + cmd_blk_offset + 5 >= end))
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break; /* No valid command to read */
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data = start + cmd_blk_offset;
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cmd_blk_ts = start_ts + STM_TO_GST (GST_READ_UINT16_BE (data));
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next_blk = GST_READ_UINT16_BE (data + 2);
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g_print ("Cmd Blk @ offset %u next %u ts %" GST_TIME_FORMAT "\n",
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cmd_blk_offset, next_blk, GST_TIME_ARGS (cmd_blk_ts));
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data += 4;
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gst_dvd_spu_exec_cmd_blk (dvdspu, data, end);
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}
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}
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#endif
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void
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gstspu_vobsub_handle_new_buf (GstDVDSpu * dvdspu, GstClockTime event_ts,
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GstBuffer * buf)
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{
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GstMapInfo map;
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guint8 *start, *end;
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SpuState *state = &dvdspu->spu_state;
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#if DUMP_DCSQ
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gst_dvd_spu_dump_dcsq (dvdspu, event_ts, buf);
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#endif
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if (G_UNLIKELY (gst_buffer_get_size (buf) < 4))
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goto invalid;
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if (state->vobsub.buf != NULL) {
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gst_buffer_unref (state->vobsub.buf);
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state->vobsub.buf = NULL;
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}
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state->vobsub.buf = buf;
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state->vobsub.base_ts = event_ts;
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gst_buffer_map (state->vobsub.buf, &map, GST_MAP_READ);
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start = map.data;
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end = start + map.size;
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/* Configure the first command block in this buffer as our initial blk */
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state->vobsub.cur_cmd_blk = GST_READ_UINT16_BE (start + 2);
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gst_dvd_spu_setup_cmd_blk (dvdspu, state->vobsub.cur_cmd_blk, start, end);
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/* Clear existing chg-colcon info */
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state->vobsub.n_line_ctrl_i = 0;
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if (state->vobsub.line_ctrl_i != NULL) {
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g_free (state->vobsub.line_ctrl_i);
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state->vobsub.line_ctrl_i = NULL;
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}
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gst_buffer_unmap (state->vobsub.buf, &map);
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return;
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invalid:
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/* Invalid buffer */
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gst_dvd_spu_finish_spu_buf (dvdspu);
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}
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gboolean
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gstspu_vobsub_execute_event (GstDVDSpu * dvdspu)
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{
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GstMapInfo map;
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guint8 *start, *cmd_blk, *end;
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guint16 next_blk;
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SpuState *state = &dvdspu->spu_state;
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gboolean ret = TRUE;
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if (state->vobsub.buf == NULL)
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return FALSE;
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GST_DEBUG_OBJECT (dvdspu, "Executing cmd blk with TS %" GST_TIME_FORMAT
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" @ offset %u", GST_TIME_ARGS (state->next_ts),
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state->vobsub.cur_cmd_blk);
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gst_buffer_map (state->vobsub.buf, &map, GST_MAP_READ);
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start = map.data;
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end = start + map.size;
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cmd_blk = start + state->vobsub.cur_cmd_blk;
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if (G_UNLIKELY (cmd_blk + 5 >= end)) {
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gst_buffer_unmap (state->vobsub.buf, &map);
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/* Invalid. Finish the buffer and loop again */
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gst_dvd_spu_finish_spu_buf (dvdspu);
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return FALSE;
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}
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gst_dvd_spu_exec_cmd_blk (dvdspu, cmd_blk + 4, end);
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next_blk = GST_READ_UINT16_BE (cmd_blk + 2);
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if (next_blk != state->vobsub.cur_cmd_blk) {
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/* Advance to the next block of commands */
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ret = gst_dvd_spu_setup_cmd_blk (dvdspu, next_blk, start, end);
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gst_buffer_unmap (state->vobsub.buf, &map);
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} else {
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/* Next Block points to the current block, so we're finished with this
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* SPU buffer */
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gst_buffer_unmap (state->vobsub.buf, &map);
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gst_dvd_spu_finish_spu_buf (dvdspu);
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ret = FALSE;
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}
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return ret;
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}
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gboolean
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gstspu_vobsub_handle_dvd_event (GstDVDSpu * dvdspu, GstEvent * event)
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{
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const gchar *event_type;
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const GstStructure *structure = gst_event_get_structure (event);
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SpuState *state = &dvdspu->spu_state;
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gboolean hl_change = FALSE;
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event_type = gst_structure_get_string (structure, "event");
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if (strcmp (event_type, "dvd-spu-clut-change") == 0) {
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gchar prop_name[32];
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gint i;
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gint entry;
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for (i = 0; i < 16; i++) {
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g_snprintf (prop_name, 32, "clut%02d", i);
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if (!gst_structure_get_int (structure, prop_name, &entry))
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entry = 0;
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state->vobsub.current_clut[i] = (guint32) entry;
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}
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state->vobsub.main_pal_dirty = TRUE;
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state->vobsub.hl_pal_dirty = TRUE;
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state->vobsub.line_ctrl_i_pal_dirty = TRUE;
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hl_change = TRUE;
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} else if (strcmp (event_type, "dvd-spu-highlight") == 0) {
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gint val;
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if (gst_structure_get_int (structure, "palette", &val)) {
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state->vobsub.hl_idx[3] = ((guint32) (val) >> 28) & 0x0f;
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state->vobsub.hl_idx[2] = ((guint32) (val) >> 24) & 0x0f;
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state->vobsub.hl_idx[1] = ((guint32) (val) >> 20) & 0x0f;
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state->vobsub.hl_idx[0] = ((guint32) (val) >> 16) & 0x0f;
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state->vobsub.hl_alpha[3] = ((guint32) (val) >> 12) & 0x0f;
|
|
state->vobsub.hl_alpha[2] = ((guint32) (val) >> 8) & 0x0f;
|
|
state->vobsub.hl_alpha[1] = ((guint32) (val) >> 4) & 0x0f;
|
|
state->vobsub.hl_alpha[0] = ((guint32) (val) >> 0) & 0x0f;
|
|
|
|
state->vobsub.hl_pal_dirty = TRUE;
|
|
}
|
|
if (gst_structure_get_int (structure, "sx", &val))
|
|
state->vobsub.hl_rect.left = (gint16) val;
|
|
if (gst_structure_get_int (structure, "sy", &val))
|
|
state->vobsub.hl_rect.top = (gint16) val;
|
|
if (gst_structure_get_int (structure, "ex", &val))
|
|
state->vobsub.hl_rect.right = (gint16) val;
|
|
if (gst_structure_get_int (structure, "ey", &val))
|
|
state->vobsub.hl_rect.bottom = (gint16) val;
|
|
|
|
GST_INFO_OBJECT (dvdspu, "Highlight rect is now (%d,%d) to (%d,%d)",
|
|
state->vobsub.hl_rect.left, state->vobsub.hl_rect.top,
|
|
state->vobsub.hl_rect.right, state->vobsub.hl_rect.bottom);
|
|
hl_change = TRUE;
|
|
} else if (strcmp (event_type, "dvd-spu-reset-highlight") == 0) {
|
|
if (state->vobsub.hl_rect.top != -1 || state->vobsub.hl_rect.bottom != -1)
|
|
hl_change = TRUE;
|
|
state->vobsub.hl_rect.top = -1;
|
|
state->vobsub.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)
|
|
hl_change = TRUE;
|
|
}
|
|
}
|
|
|
|
gst_event_unref (event);
|
|
|
|
return hl_change;
|
|
}
|
|
|
|
void
|
|
gstspu_vobsub_flush (GstDVDSpu * dvdspu)
|
|
{
|
|
SpuState *state = &dvdspu->spu_state;
|
|
|
|
if (state->vobsub.buf) {
|
|
gst_buffer_unref (state->vobsub.buf);
|
|
state->vobsub.buf = NULL;
|
|
}
|
|
if (state->vobsub.pix_buf) {
|
|
gst_buffer_unref (state->vobsub.pix_buf);
|
|
state->vobsub.pix_buf = NULL;
|
|
}
|
|
|
|
state->vobsub.base_ts = GST_CLOCK_TIME_NONE;
|
|
state->vobsub.pix_data[0] = 0;
|
|
state->vobsub.pix_data[1] = 0;
|
|
|
|
state->vobsub.hl_rect.top = -1;
|
|
state->vobsub.hl_rect.bottom = -1;
|
|
|
|
state->vobsub.disp_rect.top = -1;
|
|
state->vobsub.disp_rect.bottom = -1;
|
|
|
|
state->vobsub.n_line_ctrl_i = 0;
|
|
if (state->vobsub.line_ctrl_i != NULL) {
|
|
g_free (state->vobsub.line_ctrl_i);
|
|
state->vobsub.line_ctrl_i = NULL;
|
|
}
|
|
}
|