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Diffstat (limited to 'ffmpeg/libavcodec/vc1_parser.c')
-rw-r--r--ffmpeg/libavcodec/vc1_parser.c212
1 files changed, 0 insertions, 212 deletions
diff --git a/ffmpeg/libavcodec/vc1_parser.c b/ffmpeg/libavcodec/vc1_parser.c
deleted file mode 100644
index cc29ce1..0000000
--- a/ffmpeg/libavcodec/vc1_parser.c
+++ /dev/null
@@ -1,212 +0,0 @@
-/*
- * VC-1 and WMV3 parser
- * Copyright (c) 2006-2007 Konstantin Shishkov
- * Partly based on vc9.c (c) 2005 Anonymous, Alex Beregszaszi, Michael Niedermayer
- *
- * This file is part of FFmpeg.
- *
- * FFmpeg 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,
- * 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
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-/**
- * @file
- * VC-1 and WMV3 parser
- */
-
-#include "libavutil/attributes.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;
- vpc->v.first_pic_header_flag = 1;
- next = buf;
- s->repeat_pict = 0;
-
- for(start = buf, end = buf + buf_size; next < end; start = next){
- int buf2_size, size;
- int ret;
-
- 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)
- ret = ff_vc1_parse_frame_header (&vpc->v, &gb);
- else
- ret = ff_vc1_parse_frame_header_adv(&vpc->v, &gb);
-
- if (ret < 0)
- break;
-
- /* 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;
- }
- }
-
- if (vpc->v.broadcast && vpc->v.interlace && !vpc->v.psf)
- s->field_order = vpc->v.tff ? AV_FIELD_TT : AV_FIELD_BB;
- else
- s->field_order = AV_FIELD_PROGRESSIVE;
-
- break;
- }
- }
-
- av_free(buf2);
-}
-
-/**
- * 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,
- int buf_size) {
- int pic_found, i;
- uint32_t state;
-
- pic_found= pc->frame_start_found;
- state= pc->state;
-
- i=0;
- if(!pic_found){
- for(i=0; i<buf_size; i++){
- state= (state<<8) | buf[i];
- if(state == VC1_CODE_FRAME || state == VC1_CODE_FIELD){
- i++;
- pic_found=1;
- break;
- }
- }
- }
-
- if(pic_found){
- /* EOF considered as end of frame */
- if (buf_size == 0)
- return 0;
- for(; i<buf_size; i++){
- state= (state<<8) | buf[i];
- if(IS_MARKER(state) && state != VC1_CODE_FIELD && state != VC1_CODE_SLICE){
- pc->frame_start_found=0;
- pc->state=-1;
- return i-3;
- }
- }
- }
- pc->frame_start_found= pic_found;
- pc->state= state;
- return END_NOT_FOUND;
-}
-
-static int vc1_parse(AVCodecParserContext *s,
- AVCodecContext *avctx,
- const uint8_t **poutbuf, int *poutbuf_size,
- const uint8_t *buf, int buf_size)
-{
- VC1ParseContext *vpc = s->priv_data;
- int next;
-
- if(s->flags & PARSER_FLAG_COMPLETE_FRAMES){
- next= buf_size;
- }else{
- next= vc1_find_frame_end(&vpc->pc, buf, buf_size);
-
- if (ff_combine_frame(&vpc->pc, next, &buf, &buf_size) < 0) {
- *poutbuf = NULL;
- *poutbuf_size = 0;
- return buf_size;
- }
- }
-
- vc1_extract_headers(s, avctx, buf, buf_size);
-
- *poutbuf = buf;
- *poutbuf_size = buf_size;
- return next;
-}
-
-static int vc1_split(AVCodecContext *avctx,
- const uint8_t *buf, int buf_size)
-{
- 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)){
- if(state == VC1_CODE_SEQHDR || state == VC1_CODE_ENTRYPOINT){
- charged=1;
- }else if(charged){
- return i-3;
- }
- }
- }
- return 0;
-}
-
-static av_cold 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 = { AV_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,
-};
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