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/*****************************************************************
* gmerlin-avdecoder - a general purpose multimedia decoding library
*
* Copyright (c) 2001 - 2012 Members of the Gmerlin project
* gmerlin-general@lists.sourceforge.net
* http://gmerlin.sourceforge.net
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
* *****************************************************************/
#include <string.h>
#include <stdlib.h>
#include <avdec_private.h>
#include <parser.h>
#include <videoparser_priv.h>
#include <cavs_header.h>
#include <mpv_header.h>
#define CAVS_NEED_SYNC 0
#define CAVS_NEED_STARTCODE 1
#define CAVS_HAS_SEQ_CODE 2
#define CAVS_HAS_SEQ_HEADER 3
#define CAVS_HAS_PIC_CODE 4
#define CAVS_HAS_PIC_HEADER 5
#define STATE_SYNC 100 // Need start code
#define STATE_SEQUENCE 1 // Got sequence header
#define STATE_PICTURE 2 // Got picture header
typedef struct
{
/* Sequence header */
bgav_cavs_sequence_header_t seq;
int have_seq;
int has_picture_start;
int state;
} cavs_priv_t;
static void reset_cavs(bgav_video_parser_t * parser)
{
cavs_priv_t * priv = parser->priv;
priv->state = STATE_SYNC;
priv->has_picture_start = 0;
}
static int parse_frame_cavs(bgav_video_parser_t * parser, bgav_packet_t * p,
int64_t pts_orig)
{
int start_code;
int len;
bgav_cavs_picture_header_t ph;
const uint8_t * sc;
const uint8_t * ptr = p->data;
const uint8_t * end = p->data + p->data_size;
cavs_priv_t * priv = parser->priv;
while(1)
{
sc = bgav_mpv_find_startcode(ptr, end);
if(!sc)
return 0;
start_code = bgav_cavs_get_start_code(sc);
ptr = sc;
// fprintf(stderr, "Start code: %02x\n", sc[3]);
// gavl_hexdump(sc, 16, 16);
switch(start_code)
{
case CAVS_CODE_SEQUENCE:
if(!priv->have_seq)
{
len = bgav_cavs_sequence_header_read(parser->s->opt,
&priv->seq,
ptr, end - ptr);
if(!len)
return 0;
#ifdef DUMP_HEADERS
bgav_cavs_sequence_header_dump(&priv->seq);
#endif
ptr += len;
bgav_mpv_get_framerate(priv->seq.frame_rate_code,
&parser->format->timescale,
&parser->format->frame_duration);
parser->format->image_width = priv->seq.horizontal_size;
parser->format->image_height = priv->seq.vertical_size;
parser->format->frame_width =
(parser->format->image_width + 15) & ~15;
parser->format->frame_height =
(parser->format->image_height + 15) & ~15;
priv->have_seq = 1;
}
else
ptr += 4;
break;
case CAVS_CODE_PICTURE_I:
case CAVS_CODE_PICTURE_PB:
if(!priv->have_seq)
{
PACKET_SET_SKIP(p);
ptr += 4;
return 1;
}
len = bgav_cavs_picture_header_read(parser->s->opt,
&ph, ptr, end - ptr, &priv->seq);
if(!len)
return 0;
#ifdef DUMP_HEADERS
bgav_cavs_picture_header_dump(&ph, &priv->seq);
#endif
PACKET_SET_CODING_TYPE(p, ph.coding_type);
p->duration = parser->format->frame_duration;
return 1;
break;
default:
ptr += 4;
break;
}
}
return 0;
}
static int find_frame_boundary_cavs(bgav_video_parser_t * parser,
int * skip)
{
const uint8_t * sc;
cavs_priv_t * priv = parser->priv;
int new_state;
int start_code;
while(1)
{
sc = bgav_mpv_find_startcode(parser->buf.buffer + parser->pos,
parser->buf.buffer + parser->buf.size - 4);
if(!sc)
{
parser->pos = parser->buf.size - 4;
if(parser->pos < 0)
parser->pos = 0;
return 0;
}
new_state = -1;
start_code = bgav_cavs_get_start_code(sc);
switch(start_code)
{
case CAVS_CODE_SEQUENCE:
/* Sequence header */
new_state = STATE_SEQUENCE;
break;
case CAVS_CODE_PICTURE_I:
case CAVS_CODE_PICTURE_PB:
new_state = STATE_PICTURE;
break;
}
parser->pos = sc - parser->buf.buffer;
if(new_state < 0)
parser->pos += 4;
else if(((new_state == STATE_PICTURE) && (priv->state == STATE_PICTURE)) ||
(new_state < priv->state))
{
*skip = 4;
parser->pos = sc - parser->buf.buffer;
priv->state = new_state;
return 1;
}
else
{
parser->pos += 4;
priv->state = new_state;
}
}
return 0;
}
static void cleanup_cavs(bgav_video_parser_t * parser)
{
free(parser->priv);
}
void bgav_video_parser_init_cavs(bgav_video_parser_t * parser)
{
cavs_priv_t * priv;
priv = calloc(1, sizeof(*priv));
priv->state = STATE_SYNC;
parser->priv = priv;
// parser->parse = parse_cavs;
parser->parse_frame = parse_frame_cavs;
parser->cleanup = cleanup_cavs;
parser->reset = reset_cavs;
parser->find_frame_boundary = find_frame_boundary_cavs;
}
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