diff options
Diffstat (limited to 'gst/dvdspu')
| -rw-r--r-- | gst/dvdspu/Makefile.am | 4 | ||||
| -rw-r--r-- | gst/dvdspu/gstdvdspu.c | 341 | ||||
| -rw-r--r-- | gst/dvdspu/gstspu-vobsub.c | 377 | ||||
| -rw-r--r-- | gst/dvdspu/gstspu-vobsub.h | 25 |
4 files changed, 406 insertions, 341 deletions
diff --git a/gst/dvdspu/Makefile.am b/gst/dvdspu/Makefile.am index 2edd6e5e7..20cfe03c3 100644 --- a/gst/dvdspu/Makefile.am +++ b/gst/dvdspu/Makefile.am @@ -1,13 +1,13 @@ plugin_LTLIBRARIES = libgstdvdspu.la -libgstdvdspu_la_SOURCES = gstdvdspu.c gstdvdspu-render.c gstspu-pgs.c +libgstdvdspu_la_SOURCES = gstdvdspu.c gstdvdspu-render.c gstspu-vobsub.c gstspu-pgs.c libgstdvdspu_la_CFLAGS = $(GST_CFLAGS) libgstdvdspu_la_LIBADD = $(GST_LIBS) libgstdvdspu_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS) libgstdvdspu_la_LIBTOOLFLAGS = --tag=disable-static -noinst_HEADERS = gstdvdspu.h gstspu-pgs.h +noinst_HEADERS = gstdvdspu.h gstspu-pgs.h gstspu-vobsub.h EXTRA_DIST = Notes.txt diff --git a/gst/dvdspu/gstdvdspu.c b/gst/dvdspu/gstdvdspu.c index 69bc3c99b..c9c116e85 100644 --- a/gst/dvdspu/gstdvdspu.c +++ b/gst/dvdspu/gstdvdspu.c @@ -39,18 +39,14 @@ #include <gst/gst.h> #include "gstdvdspu.h" +#include "gstspu-vobsub.h" #include "gstspu-pgs.h" -#define DUMP_DCSQ 0 - extern void gst_dvd_spu_render_spu (GstDVDSpu * dvdspu, GstBuffer * buf); 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 { @@ -709,267 +705,6 @@ gst_dvd_spu_redraw_still (GstDVDSpu * dvdspu, gboolean force) } static void -gst_dvd_spu_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 -gst_dvd_spu_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 */ - - gst_dvd_spu_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 -gst_dvd_spu_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 -gst_dvd_spu_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 -gst_dvd_spu_handle_new_vobsub_buf (GstDVDSpu * dvdspu, SpuPacket * packet) -{ - guint8 *start, *end; - SpuState *state = &dvdspu->spu_state; - -#if DUMP_DCSQ - gst_dvd_spu_dump_dcsq (dvdspu, packet->event_ts, packet->buf); -#endif - - 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); - gst_dvd_spu_setup_cmd_blk (dvdspu, state->cur_cmd_blk, start, end); - /* Clear 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; - } - return; - -invalid: - /* Invalid buffer */ - gst_dvd_spu_finish_spu_buf (dvdspu); -} - -static void gst_dvd_spu_handle_dvd_event (GstDVDSpu * dvdspu, GstEvent * event) { const gchar *event_type; @@ -1055,51 +790,6 @@ gst_dvd_spu_handle_dvd_event (GstDVDSpu * dvdspu, GstEvent * event) gst_event_unref (event); } -#if DUMP_DCSQ -static void -gst_dvd_spu_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; - gst_dvd_spu_exec_cmd_blk (dvdspu, data, end); - } -} -#endif - /* Advance the SPU packet/command queue to a time. new_ts is in running time */ static void gst_dvd_spu_advance_spu (GstDVDSpu * dvdspu, GstClockTime new_ts) @@ -1107,9 +797,6 @@ gst_dvd_spu_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; @@ -1159,31 +846,7 @@ gst_dvd_spu_advance_spu (GstDVDSpu * dvdspu, GstClockTime new_ts) * next cmd */ g_assert (state->buf != NULL); - 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 */ - gst_dvd_spu_finish_spu_buf (dvdspu); - continue; - } - - gst_dvd_spu_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 */ - gst_dvd_spu_setup_cmd_blk (dvdspu, next_blk, start, end); - } else { - /* Next Block points to the current block, so we're finished with this - * SPU buffer */ - gst_dvd_spu_finish_spu_buf (dvdspu); - } + gst_dvdspu_vobsub_execute_event (dvdspu); } } diff --git a/gst/dvdspu/gstspu-vobsub.c b/gst/dvdspu/gstspu-vobsub.c new file mode 100644 index 000000000..c13d9ab02 --- /dev/null +++ b/gst/dvdspu/gstspu-vobsub.c @@ -0,0 +1,377 @@ +/* GStreamer Sub-Picture Unit - VobSub/DVD handling + * Copyright (C) 2009 Jan Schmidt <thaytan@noraisin.net> + * + * 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" +#include "gstspu-vobsub.h" + +GST_DEBUG_CATEGORY_EXTERN (dvdspu_debug); +#define GST_CAT_DEFAULT dvdspu_debug + +/* Define to dump out a text description of the incoming SPU commands */ +#define DUMP_DCSQ 0 + +/* Convert an STM offset in the SPU sequence to a GStreamer timestamp */ +#define STM_TO_GST(stm) ((GST_MSECOND * 1024 * (stm)) / 90) + +static void +gst_dvd_spu_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 +gst_dvd_spu_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 */ + + gst_dvd_spu_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 +gst_dvd_spu_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 +gst_dvd_spu_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; +} + +#if DUMP_DCSQ +static void +gst_dvd_spu_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; + gst_dvd_spu_exec_cmd_blk (dvdspu, data, end); + } +} +#endif + +void +gst_dvd_spu_handle_new_vobsub_buf (GstDVDSpu * dvdspu, SpuPacket * packet) +{ + guint8 *start, *end; + SpuState *state = &dvdspu->spu_state; + +#if DUMP_DCSQ + gst_dvd_spu_dump_dcsq (dvdspu, packet->event_ts, packet->buf); +#endif + + 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); + gst_dvd_spu_setup_cmd_blk (dvdspu, state->cur_cmd_blk, start, end); + /* Clear 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; + } + return; + +invalid: + /* Invalid buffer */ + gst_dvd_spu_finish_spu_buf (dvdspu); +} + +void +gst_dvdspu_vobsub_execute_event (GstDVDSpu * dvdspu) +{ + guint8 *start, *cmd_blk, *end; + guint16 next_blk; + SpuState *state = &dvdspu->spu_state; + + 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 */ + gst_dvd_spu_finish_spu_buf (dvdspu); + return; + } + + gst_dvd_spu_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 */ + gst_dvd_spu_setup_cmd_blk (dvdspu, next_blk, start, end); + } else { + /* Next Block points to the current block, so we're finished with this + * SPU buffer */ + gst_dvd_spu_finish_spu_buf (dvdspu); + } +} diff --git a/gst/dvdspu/gstspu-vobsub.h b/gst/dvdspu/gstspu-vobsub.h new file mode 100644 index 000000000..f600e7d75 --- /dev/null +++ b/gst/dvdspu/gstspu-vobsub.h @@ -0,0 +1,25 @@ +/* GStreamer Sub-Picture Unit - VobSub/DVD handling + * Copyright (C) 2009 Jan Schmidt <thaytan@noraisin.net> + * + * 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 __GSTSPU_VOBSUB_H__ +#define __GSTSPU_VOBSUB_H__ + +void gst_dvd_spu_handle_new_vobsub_buf (GstDVDSpu * dvdspu, SpuPacket * packet); +void gst_dvdspu_vobsub_execute_event (GstDVDSpu *dvdspu); + +#endif |