* Copyright (c) 2006-2007 Konstantin Shishkov
* Partly based on vc9.c (c) 2005 Anonymous, Alex Beregszaszi, Michael Niedermayer
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
- * @file vc1_parser.c
+ * @file
* VC-1 and WMV3 parser
*/
-#include "dsputil.h"
+
#include "parser.h"
#include "vc1.h"
+#include "get_bits.h"
+
+typedef struct {
+ ParseContext pc;
+ VC1Context v;
+} VC1ParseContext;
+
+static void vc1_extract_headers(AVCodecParserContext *s, AVCodecContext *avctx,
+ const uint8_t *buf, int buf_size)
+{
+ VC1ParseContext *vpc = s->priv_data;
+ GetBitContext gb;
+ const uint8_t *start, *end, *next;
+ uint8_t *buf2 = av_mallocz(buf_size + FF_INPUT_BUFFER_PADDING_SIZE);
+
+ vpc->v.s.avctx = avctx;
+ vpc->v.parse_only = 1;
+ next = buf;
+ s->repeat_pict = 0;
+
+ for(start = buf, end = buf + buf_size; next < end; start = next){
+ int buf2_size, size;
+
+ next = find_next_marker(start + 4, end);
+ size = next - start - 4;
+ buf2_size = vc1_unescape_buffer(start + 4, size, buf2);
+ init_get_bits(&gb, buf2, buf2_size * 8);
+ if(size <= 0) continue;
+ switch(AV_RB32(start)){
+ case VC1_CODE_SEQHDR:
+ ff_vc1_decode_sequence_header(avctx, &vpc->v, &gb);
+ break;
+ case VC1_CODE_ENTRYPOINT:
+ ff_vc1_decode_entry_point(avctx, &vpc->v, &gb);
+ break;
+ case VC1_CODE_FRAME:
+ if(vpc->v.profile < PROFILE_ADVANCED)
+ ff_vc1_parse_frame_header (&vpc->v, &gb);
+ else
+ ff_vc1_parse_frame_header_adv(&vpc->v, &gb);
+
+ /* keep AV_PICTURE_TYPE_BI internal to VC1 */
+ if (vpc->v.s.pict_type == AV_PICTURE_TYPE_BI)
+ s->pict_type = AV_PICTURE_TYPE_B;
+ else
+ s->pict_type = vpc->v.s.pict_type;
+
+ if (avctx->ticks_per_frame > 1){
+ // process pulldown flags
+ s->repeat_pict = 1;
+ // Pulldown flags are only valid when 'broadcast' has been set.
+ // So ticks_per_frame will be 2
+ if (vpc->v.rff){
+ // repeat field
+ s->repeat_pict = 2;
+ }else if (vpc->v.rptfrm){
+ // repeat frames
+ s->repeat_pict = vpc->v.rptfrm * 2 + 1;
+ }
+ }
+
+ break;
+ }
+ }
+
+ av_free(buf2);
+}
/**
- * finds the end of the current frame in the bitstream.
+ * Find the end of the current frame in the bitstream.
* @return the position of the first byte of the next frame, or -1
*/
static int vc1_find_frame_end(ParseContext *pc, const uint8_t *buf,
static int vc1_parse(AVCodecParserContext *s,
AVCodecContext *avctx,
- uint8_t **poutbuf, int *poutbuf_size,
+ const uint8_t **poutbuf, int *poutbuf_size,
const uint8_t *buf, int buf_size)
{
- ParseContext *pc = s->priv_data;
+ VC1ParseContext *vpc = s->priv_data;
int next;
if(s->flags & PARSER_FLAG_COMPLETE_FRAMES){
next= buf_size;
}else{
- next= vc1_find_frame_end(pc, buf, buf_size);
+ next= vc1_find_frame_end(&vpc->pc, buf, buf_size);
- if (ff_combine_frame(pc, next, (uint8_t **)&buf, &buf_size) < 0) {
+ if (ff_combine_frame(&vpc->pc, next, &buf, &buf_size) < 0) {
*poutbuf = NULL;
*poutbuf_size = 0;
return buf_size;
}
}
- *poutbuf = (uint8_t *)buf;
+
+ vc1_extract_headers(s, avctx, buf, buf_size);
+
+ *poutbuf = buf;
*poutbuf_size = buf_size;
return next;
}
{
int i;
uint32_t state= -1;
+ int charged=0;
for(i=0; i<buf_size; i++){
state= (state<<8) | buf[i];
- if(IS_MARKER(state) && state != VC1_CODE_SEQHDR && state != VC1_CODE_ENTRYPOINT)
- return i-3;
+ if(IS_MARKER(state)){
+ if(state == VC1_CODE_SEQHDR || state == VC1_CODE_ENTRYPOINT){
+ charged=1;
+ }else if(charged){
+ return i-3;
+ }
+ }
}
return 0;
}
-AVCodecParser vc1_parser = {
- { CODEC_ID_VC1 },
- sizeof(ParseContext1),
- NULL,
- vc1_parse,
- ff_parse1_close,
- vc1_split,
+static int vc1_parse_init(AVCodecParserContext *s)
+{
+ VC1ParseContext *vpc = s->priv_data;
+ vpc->v.s.slice_context_count = 1;
+ return ff_vc1_init_common(&vpc->v);
+}
+
+AVCodecParser ff_vc1_parser = {
+ .codec_ids = { CODEC_ID_VC1 },
+ .priv_data_size = sizeof(VC1ParseContext),
+ .parser_init = vc1_parse_init,
+ .parser_parse = vc1_parse,
+ .parser_close = ff_parse_close,
+ .split = vc1_split,
};
projects / ffmpeg / blobdiff