gstreamer/gst/dvdspu/gstspu-pgs.c

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/* GStreamer Sub-Picture Unit - PGS 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-pgs.h"
const struct PgsFrameRateEntry
{
guint8 id;
guint fps_n;
guint fps_d;
} PgsFrameRates[] = {
{
64, 30000, 1001} /* 29.97 FPS */
};
typedef enum PgsCommandType PgsCommandType;
enum PgsCommandType
{
PGS_COMMAND_SET_PALETTE = 0x14,
PGS_COMMAND_SET_OBJECT_DATA = 0x15,
PGS_COMMAND_PRESENTATION_SEGMENT = 0x16,
PGS_COMMAND_SET_WINDOW = 0x17,
PGS_COMMAND_INTERACTIVE_SEGMENT = 0x18,
PGS_COMMAND_END_DISPLAY = 0x80,
PGS_COMMAND_INVALID = 0xFFFF
};
static gint gstspu_exec_pgs_buffer (GstDVDSpu * dvdspu, GstBuffer * buf);
#define DUMP_CMDS 0
#define DUMP_FULL_IMAGE 0
#define DUMP_FULL_PALETTE 0
#if DUMP_CMDS
#define PGS_DUMP(...) g_print(__VA_ARGS__)
#else
#define PGS_DUMP(...)
#endif
static void
dump_bytes (guint8 * data, guint16 len)
{
gint i;
/* Dump the numbers */
for (i = 0; i < len; i++) {
PGS_DUMP ("0x%02x ", data[i]);
if (!((i + 1) % 16))
PGS_DUMP ("\n");
}
if (len > 0 && (i % 16))
PGS_DUMP ("\n");
}
static void
dump_rle_data (GstDVDSpu * dvdspu, guint8 * data, guint32 len)
{
guint8 *end = data + len;
guint16 obj_w, obj_h;
guint x = 0;
if (data + 4 > end)
return;
/* RLE data: */
obj_w = GST_READ_UINT16_BE (data);
obj_h = GST_READ_UINT16_BE (data + 2);
data += 4;
PGS_DUMP ("RLE image is %ux%u\n", obj_w, obj_h);
while (data < end) {
guint8 pal_id;
guint16 run_len;
pal_id = *data++;
if (pal_id != 0) {
// PGS_DUMP ("data 0x%02x\n", data[0]);
run_len = 1;
} else {
if (data + 1 > end)
return;
switch (data[0] & 0xC0) {
case 0x00:
//PGS_DUMP ("data 0x%02x\n", data[0]);
run_len = (data[0] & 0x3f);
data++;
break;
case 0x40:
if (data + 2 > end)
return;
//PGS_DUMP ("data 0x%02x 0x%02x\n", data[0], data[1]);
run_len = ((data[0] << 8) | data[1]) & 0x3fff;
data += 2;
break;
case 0x80:
if (data + 2 > end)
return;
//PGS_DUMP ("data 0x%02x 0x%02x\n", data[0], data[1]);
run_len = (data[0] & 0x3f);
pal_id = data[1];
data += 2;
break;
case 0xC0:
if (data + 3 > end)
return;
//PGS_DUMP ("data 0x%02x 0x%02x 0x%02x\n", data[0], data[1], data[2]);
run_len = ((data[0] << 8) | data[1]) & 0x3fff;
pal_id = data[2];
data += 3;
break;
default:
run_len = 0;
break;
}
}
#if DUMP_FULL_IMAGE
{
gint i;
#if 1
if (dvdspu->spu_state.pgs.palette[pal_id].A) {
guint8 val = dvdspu->spu_state.pgs.palette[pal_id].A;
for (i = 0; i < run_len; i++)
PGS_DUMP ("%02x ", val);
} else {
for (i = 0; i < run_len; i++)
PGS_DUMP (" ");
}
if (!run_len || (x + run_len) > obj_w)
PGS_DUMP ("\n");
#else
PGS_DUMP ("Run x: %d pix: %d col: %d\n", x, run_len, pal_id);
#endif
}
#endif
x += run_len;
if (!run_len || x > obj_w)
x = 0;
};
PGS_DUMP ("\n");
}
static void
pgs_composition_object_render (PgsCompositionObject * obj, SpuState * state,
GstBuffer * dest_buf)
{
SpuColour *colour;
guint8 *planes[3]; /* YUV frame pointers */
guint8 *data, *end;
guint16 obj_w, obj_h;
guint x, y, i, max_x;
if (G_UNLIKELY (obj->rle_data == NULL || obj->rle_data_size == 0
|| obj->rle_data_used != obj->rle_data_size))
return;
data = obj->rle_data;
end = data + obj->rle_data_used;
if (data + 4 > end)
return;
/* FIXME: Calculate and use the cropping window for the output, as the
* intersection of the crop rectangle for this object (if any) and the
* window specified by the object's window_id */
/* Store the start of each plane */
planes[0] = GST_BUFFER_DATA (dest_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 (dest_buf) + GST_BUFFER_SIZE (dest_buf));
x = obj->x;
y = obj->y;
planes[0] += state->Y_stride * y;
planes[1] += state->UV_stride * (y / 2);
planes[2] += state->UV_stride * (y / 2);
/* RLE data: */
obj_w = GST_READ_UINT16_BE (data);
obj_h = GST_READ_UINT16_BE (data + 2);
data += 4;
max_x = x + obj_w;
state->comp_left = x;
state->comp_right = max_x;
gstspu_clear_comp_buffers (state);
while (data < end) {
guint8 pal_id;
guint16 run_len;
pal_id = *data++;
if (pal_id != 0) {
run_len = 1;
} else {
if (data + 1 > end)
return;
switch (data[0] & 0xC0) {
case 0x00:
run_len = (data[0] & 0x3f);
data++;
break;
case 0x40:
if (data + 2 > end)
return;
run_len = ((data[0] << 8) | data[1]) & 0x3fff;
data += 2;
break;
case 0x80:
if (data + 2 > end)
return;
run_len = (data[0] & 0x3f);
pal_id = data[1];
data += 2;
break;
case 0xC0:
if (data + 3 > end)
return;
run_len = ((data[0] << 8) | data[1]) & 0x3fff;
pal_id = data[2];
data += 3;
break;
default:
run_len = 0;
break;
}
}
colour = &state->pgs.palette[pal_id];
if (colour->A) {
guint32 inv_A = 0xff - colour->A;
for (i = 0; i < run_len; i++) {
planes[0][x] = (inv_A * planes[0][x] + colour->Y) / 0xff;
state->comp_bufs[0][x / 2] += colour->U;
state->comp_bufs[1][x / 2] += colour->V;
state->comp_bufs[2][x / 2] += colour->A;
x++;
}
} else {
x += run_len;
}
if (!run_len || x > max_x) {
x = state->pgs.win_x;
planes[0] += state->Y_stride;
if (y % 2) {
gstspu_blend_comp_buffers (state, planes);
gstspu_clear_comp_buffers (state);
planes[1] += state->UV_stride;
planes[2] += state->UV_stride;
}
y++;
}
}
if (y % 2)
gstspu_blend_comp_buffers (state, planes);
}
static void
pgs_composition_object_clear (PgsCompositionObject * obj)
{
if (obj->rle_data) {
g_free (obj->rle_data);
obj->rle_data = NULL;
}
obj->rle_data_size = obj->rle_data_used = 0;
}
static void
pgs_presentation_segment_set_object_count (PgsPresentationSegment * ps,
guint8 n_objects)
{
if (ps->objects == NULL) {
ps->objects =
g_array_sized_new (FALSE, TRUE, sizeof (PgsCompositionObject),
n_objects);
g_array_set_size (ps->objects, n_objects);
return;
}
/* Clear memory in any extraneous objects */
if (ps->objects->len > n_objects) {
guint i;
for (i = n_objects; i < ps->objects->len; i++) {
PgsCompositionObject *cur =
&g_array_index (ps->objects, PgsCompositionObject, i);
pgs_composition_object_clear (cur);
}
}
g_array_set_size (ps->objects, n_objects);
if (n_objects == 0) {
g_array_free (ps->objects, TRUE);
ps->objects = NULL;
}
}
static PgsCompositionObject *
pgs_presentation_segment_find_object (PgsPresentationSegment * ps,
guint16 obj_id)
{
guint i;
if (ps->objects == NULL)
return NULL;
for (i = 0; i < ps->objects->len; i++) {
PgsCompositionObject *cur =
&g_array_index (ps->objects, PgsCompositionObject, i);
if (cur->id == obj_id)
return cur;
}
return NULL;
}
static int
parse_presentation_segment (GstDVDSpu * dvdspu, guint8 type, guint8 * payload,
guint16 len)
{
guint8 *end = payload + len;
PgsPresentationSegment *ps = &dvdspu->spu_state.pgs.pres_seg;
guint8 n_objects, palette_id;
gint i;
/* Parse video descriptor */
if (payload + 5 > end)
return 0;
ps->vid_w = GST_READ_UINT16_BE (payload);
ps->vid_h = GST_READ_UINT16_BE (payload + 2);
ps->vid_fps_code = payload[4];
payload += 5;
/* Parse composition descriptor */
if (payload + 3 > end)
return 0;
ps->composition_no = GST_READ_UINT16_BE (payload);
ps->composition_state = payload[2];
payload += 3;
/* Parse other bits */
if (payload + 3 > end)
return 0;
ps->flags = payload[0];
palette_id = payload[1];
n_objects = payload[2];
payload += 3;
if (ps->flags & PGS_PRES_SEGMENT_FLAG_UPDATE_PALETTE)
ps->palette_id = palette_id;
PGS_DUMP ("Video width %u height %u fps code %u\n", ps->vid_w, ps->vid_h,
ps->vid_fps_code);
PGS_DUMP
("Composition num %u state 0x%02x flags 0x%02x palette id %u n_objects %u\n",
ps->composition_no, ps->composition_state, ps->flags, ps->palette_id,
n_objects);
pgs_presentation_segment_set_object_count (ps, n_objects);
for (i = 0; i < (gint) n_objects; i++) {
PgsCompositionObject *obj =
&g_array_index (ps->objects, PgsCompositionObject, i);
if (payload + 8 > end)
break;
obj->id = GST_READ_UINT16_BE (payload);
obj->win_id = payload[2];
obj->flags = payload[3];
obj->x = GST_READ_UINT16_BE (payload + 4);
obj->y = GST_READ_UINT16_BE (payload + 6);
obj->rle_data_size = obj->rle_data_used = 0;
payload += 8;
PGS_DUMP ("Composition object %d Object ID %u Window ID %u flags 0x%02x "
"x %u y %u\n", i, obj->id, obj->win_id, obj->flags, obj->x, obj->y);
if (obj->flags & PGS_COMPOSITION_OBJECT_FLAG_CROPPED) {
if (payload + 8 > end)
break;
obj->crop_x = GST_READ_UINT16_BE (payload);
obj->crop_y = GST_READ_UINT16_BE (payload + 2);
obj->crop_w = GST_READ_UINT16_BE (payload + 4);
obj->crop_h = GST_READ_UINT16_BE (payload + 6);
payload += 8;
PGS_DUMP ("Cropping window x %u y %u w %u h %u\n",
obj->crop_x, obj->crop_y, obj->crop_w, obj->crop_h);
}
if (obj->flags & ~(PGS_COMPOSITION_OBJECT_FLAG_CROPPED |
PGS_COMPOSITION_OBJECT_FLAG_FORCED))
GST_ERROR ("PGS Composition Object has unknown flags: 0x%02x",
obj->flags);
}
if (payload != end) {
GST_ERROR ("PGS Composition Object: %" G_GSSIZE_FORMAT
" bytes not consumed", (gssize) (end - payload));
dump_bytes (payload, end - payload);
}
return 0;
}
static int
parse_set_palette (GstDVDSpu * dvdspu, guint8 type, guint8 * payload,
guint16 len)
{
SpuState *state = &dvdspu->spu_state;
const gint PGS_PALETTE_ENTRY_SIZE = 5;
guint8 *end = payload + len;
guint8 palette_id;
guint8 palette_version;
gint n_entries, i;
if (len < 2) /* Palette command too short */
return 0;
palette_id = payload[0];
palette_version = payload[1];
payload += 2;
n_entries = (len - 2) / PGS_PALETTE_ENTRY_SIZE;
PGS_DUMP ("Palette ID %u version %u. %d entries\n",
palette_id, palette_version, n_entries);
for (i = 0; i < 256; i++)
state->pgs.palette[i].A = 0;
for (i = 0; i < n_entries; i++) {
guint8 n, Y, U, V, A;
n = payload[0];
Y = payload[1];
U = payload[2];
V = payload[3];
A = payload[4];
#if DUMP_FULL_PALETTE
PGS_DUMP ("Entry %3d: Y %3d U %3d V %3d A %3d ", n, Y, U, V, A);
if (((i + 1) % 2) == 0)
PGS_DUMP ("\n");
#endif
/* Premultiply the palette entries by the alpha */
state->pgs.palette[n].Y = Y * A;
state->pgs.palette[n].U = U * A;
state->pgs.palette[n].V = V * A;
state->pgs.palette[n].A = A;
payload += PGS_PALETTE_ENTRY_SIZE;
}
#if DUMP_FULL_PALETTE
if (n_entries > 0 && (i % 2))
PGS_DUMP ("\n");
#endif
if (payload != end) {
GST_ERROR ("PGS Set Palette: %" G_GSSIZE_FORMAT " bytes not consumed",
(gssize) (end - payload));
dump_bytes (payload, end - payload);
}
return 0;
}
static int
parse_set_window (GstDVDSpu * dvdspu, guint8 type, guint8 * payload,
guint16 len)
{
SpuState *state = &dvdspu->spu_state;
guint8 *end = payload + len;
guint8 win_id, win_ver;
if (payload + 10 > end)
return 0;
dump_bytes (payload, len);
/* FIXME: This is just a guess as to what the numbers mean: */
win_id = payload[0];
win_ver = payload[1];
state->pgs.win_x = GST_READ_UINT16_BE (payload + 2);
state->pgs.win_y = GST_READ_UINT16_BE (payload + 4);
state->pgs.win_w = GST_READ_UINT16_BE (payload + 6);
state->pgs.win_h = GST_READ_UINT16_BE (payload + 8);
payload += 10;
PGS_DUMP ("Win ID %u version %d x %d y %d w %d h %d\n",
win_id, win_ver, state->pgs.win_x, state->pgs.win_y, state->pgs.win_w,
state->pgs.win_h);
if (payload != end) {
GST_ERROR ("PGS Set Window: %" G_GSSIZE_FORMAT " bytes not consumed",
(gssize) (end - payload));
dump_bytes (payload, end - payload);
}
return 0;
}
static int
parse_set_object_data (GstDVDSpu * dvdspu, guint8 type, guint8 * payload,
guint16 len)
{
SpuPgsState *pgs_state = &dvdspu->spu_state.pgs;
PgsCompositionObject *obj;
guint8 *end = payload + len;
guint16 obj_id;
guint8 obj_ver, flags;
if (payload + 4 > end)
return 0;
obj_id = GST_READ_UINT16_BE (payload);
obj_ver = payload[2];
flags = payload[3];
payload += 4;
obj = pgs_presentation_segment_find_object (&(pgs_state->pres_seg), obj_id);
PGS_DUMP ("Object ID %d ver %u flags 0x%02x\n", obj_id, obj_ver, flags);
if (flags & PGS_OBJECT_UPDATE_FLAG_START_RLE) {
obj->rle_data_ver = obj_ver;
if (payload + 3 > end)
return 0;
obj->rle_data_size = GST_READ_UINT24_BE (payload);
payload += 3;
PGS_DUMP ("%d bytes of RLE data, of %d bytes total.\n",
end - payload, obj->rle_data_size);
obj->rle_data = g_realloc (obj->rle_data, obj->rle_data_size);
obj->rle_data_used = end - payload;
memcpy (obj->rle_data, payload, end - payload);
payload = end;
} else {
PGS_DUMP ("%d bytes of additional RLE data\n", end - payload);
/* Check that the data chunk is for this object version, and fits in the buffer */
if (obj->rle_data_ver == obj_ver &&
obj->rle_data_used + end - payload <= obj->rle_data_size) {
memcpy (obj->rle_data + obj->rle_data_used, payload, end - payload);
obj->rle_data_used += end - payload;
payload = end;
}
}
if (obj->rle_data_size == obj->rle_data_used)
dump_rle_data (dvdspu, obj->rle_data, obj->rle_data_size);
if (payload != end) {
GST_ERROR ("PGS Set Object Data: %" G_GSSIZE_FORMAT " bytes not consumed",
(gssize) (end - payload));
dump_bytes (payload, end - payload);
}
return 0;
}
static int
parse_pgs_packet (GstDVDSpu * dvdspu, guint8 type, guint8 * payload,
guint16 len)
{
SpuPgsState *pgs_state = &dvdspu->spu_state.pgs;
int ret = 0;
if (!pgs_state->in_presentation_segment
&& type != PGS_COMMAND_PRESENTATION_SEGMENT) {
PGS_DUMP ("Expected BEGIN PRESENTATION SEGMENT command. "
"Got command type 0x%02x len %u. Skipping\n", type, len);
return 0;
}
switch (type) {
case PGS_COMMAND_PRESENTATION_SEGMENT:
PGS_DUMP ("*******************************************\n"
"Begin PRESENTATION_SEGMENT (0x%02x) packet len %u\n", type, len);
pgs_state->in_presentation_segment =
pgs_state->have_presentation_segment = TRUE;
ret = parse_presentation_segment (dvdspu, type, payload, len);
break;
case PGS_COMMAND_SET_OBJECT_DATA:
PGS_DUMP ("*** Set Object Data (0x%02x) packet len %u\n", type, len);
ret = parse_set_object_data (dvdspu, type, payload, len);
break;
case PGS_COMMAND_SET_PALETTE:
PGS_DUMP ("*** Set Palette (0x%02x) packet len %u\n", type, len);
ret = parse_set_palette (dvdspu, type, payload, len);
break;
case PGS_COMMAND_SET_WINDOW:
PGS_DUMP ("*** Set Window command (0x%02x) packet len %u\n", type, len);
ret = parse_set_window (dvdspu, type, payload, len);
break;
case PGS_COMMAND_INTERACTIVE_SEGMENT:
PGS_DUMP ("*** Interactive Segment command(0x%02x) packet len %u\n",
type, len);
dump_bytes (payload, len);
break;
case PGS_COMMAND_END_DISPLAY:
PGS_DUMP ("*** End Display command (0x%02x) packet len %u\n", type,
len);
pgs_state->in_presentation_segment = FALSE;
break;
default:
GST_ERROR ("Unknown PGS command: type 0x%02x len %u", type, len);
dump_bytes (payload, len);
break;
}
PGS_DUMP ("\n");
return ret;
}
gint
gstspu_exec_pgs_buffer (GstDVDSpu * dvdspu, GstBuffer * buf)
{
guint8 *pos, *end;
guint8 type;
guint16 packet_len;
pos = GST_BUFFER_DATA (buf);
end = pos + GST_BUFFER_SIZE (buf);
/* Need at least 3 bytes */
if (pos + 3 > end) {
PGS_DUMP ("Not enough bytes to be a PGS packet\n");
return -1;
}
PGS_DUMP ("Begin dumping command buffer of size %u ts %" GST_TIME_FORMAT "\n",
end - pos, GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
do {
type = *pos++;
packet_len = GST_READ_UINT16_BE (pos);
pos += 2;
if (pos + packet_len > end) {
PGS_DUMP ("Invalid packet length %u (only have %u bytes)\n", packet_len,
end - pos);
return -1;
}
if (parse_pgs_packet (dvdspu, type, pos, packet_len))
return -1;
pos += packet_len;
} while (pos + 3 <= end);
PGS_DUMP ("End dumping command buffer with %u bytes remaining\n", end - pos);
return (pos - GST_BUFFER_DATA (buf));
}
void
gstspu_pgs_handle_new_buf (GstDVDSpu * dvdspu, GstClockTime event_ts,
GstBuffer * buf)
{
SpuState *state = &dvdspu->spu_state;
state->next_ts = event_ts;
state->pgs.pending_cmd = buf;
}
gboolean
gstspu_pgs_execute_event (GstDVDSpu * dvdspu)
{
SpuState *state = &dvdspu->spu_state;
if (state->pgs.pending_cmd) {
gstspu_exec_pgs_buffer (dvdspu, state->pgs.pending_cmd);
gst_buffer_unref (state->pgs.pending_cmd);
state->pgs.pending_cmd = NULL;
}
state->next_ts = GST_CLOCK_TIME_NONE;
state->flags &= ~SPU_STATE_DISPLAY;
if (state->pgs.have_presentation_segment) {
if (state->pgs.pres_seg.objects && state->pgs.pres_seg.objects->len > 0)
state->flags |= SPU_STATE_DISPLAY;
}
return FALSE;
}
void
gstspu_pgs_render (GstDVDSpu * dvdspu, GstBuffer * buf)
{
SpuState *state = &dvdspu->spu_state;
PgsPresentationSegment *ps = &state->pgs.pres_seg;
guint i;
if (ps->objects == NULL)
return;
for (i = 0; i < ps->objects->len; i++) {
PgsCompositionObject *cur =
&g_array_index (ps->objects, PgsCompositionObject, i);
pgs_composition_object_render (cur, state, buf);
}
}
gboolean
gstspu_pgs_handle_dvd_event (GstDVDSpu * dvdspu, GstEvent * event)
{
return FALSE;
}
void
gstspu_pgs_flush (GstDVDSpu * dvdspu)
{
SpuPgsState *pgs_state = &dvdspu->spu_state.pgs;
if (pgs_state->pending_cmd) {
gst_buffer_unref (pgs_state->pending_cmd);
pgs_state->pending_cmd = NULL;
}
pgs_state->have_presentation_segment = FALSE;
pgs_state->in_presentation_segment = FALSE;
pgs_presentation_segment_set_object_count (&pgs_state->pres_seg, 0);
pgs_state->win_x = pgs_state->win_y = pgs_state->win_w = pgs_state->win_h = 0;
}