* 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
*/
-#ifndef FFMPEG_VC1_H
-#define FFMPEG_VC1_H
+#ifndef AVCODEC_VC1_H
+#define AVCODEC_VC1_H
#include "avcodec.h"
#include "mpegvideo.h"
#include "intrax8.h"
+#include "vc1dsp.h"
/** Markers used in VC-1 AP frame data */
//@{
};
//@}
-/** One more frame type */
-#define BI_TYPE 7
-
enum CodingSet {
CS_HIGH_MOT_INTRA = 0,
CS_HIGH_MOT_INTER,
typedef struct VC1Context{
MpegEncContext s;
IntraX8Context x8;
+ VC1DSPContext vc1dsp;
int bits;
/** Simple/Main Profile sequence header */
//@{
- int res_sm; ///< reserved, 2b
+ int res_sprite; ///< reserved, sprite mode
+ int res_y411; ///< reserved, old interlaced mode
int res_x8; ///< reserved
int multires; ///< frame-level RESPIC syntax element present
int res_fasttx; ///< reserved, always 1
int interlace; ///< Progressive/interlaced (RPTFTM syntax element)
int tfcntrflag; ///< TFCNTR present
int panscanflag; ///< NUMPANSCANWIN, TOPLEFT{X,Y}, BOTRIGHT{X,Y} present
+ int refdist_flag; ///< REFDIST syntax element present in II, IP, PI or PP field picture headers
int extended_dmv; ///< Additional extended dmv range at P/B frame-level
int color_prim; ///< 8bits, chroma coordinates of the color primaries
int transfer_char; ///< 8bits, Opto-electronic transfer characteristics
int k_y; ///< Number of bits for MVs (depends on MV range)
int range_x, range_y; ///< MV range
uint8_t pq, altpq; ///< Current/alternate frame quantizer scale
+ uint8_t zz_8x8[4][64];///< Zigzag table for TT_8x8, permuted for IDCT
+ int left_blk_sh, top_blk_sh; ///< Either 3 or 0, positions of l/t in blk[]
+ const uint8_t* zz_8x4;///< Zigzag scan table for TT_8x4 coding mode
+ const uint8_t* zz_4x8;///< Zigzag scan table for TT_4x8 coding mode
/** pquant parameters */
//@{
uint8_t dquantfrm;
//@}
int ttfrm; ///< Transform type info present at frame level
uint8_t ttmbf; ///< Transform type flag
- uint8_t ttblk4x4; ///< Value of ttblk which indicates a 4x4 transform
+ int *ttblk_base, *ttblk; ///< Transform type at the block level
int codingset; ///< index of current table set from 11.8 to use for luma block decoding
int codingset2; ///< index of current table set from 11.8 to use for chroma block decoding
int pqindex; ///< raw pqindex used in coding set selection
uint8_t range_mapuv;
//@}
+ /** Frame decoding info for sprite modes */
+ //@{
+ int new_sprite;
+ int two_sprites;
+ //@}
+
int p_frame_skipped;
int bi_type;
int x8_type;
+
+ DCTELEM (*block)[6][64];
+ int n_allocated_blks, cur_blk_idx, left_blk_idx, topleft_blk_idx, top_blk_idx;
+ uint32_t *cbp_base, *cbp;
+ uint8_t *is_intra_base, *is_intra;
+ int16_t (*luma_mv_base)[2], (*luma_mv)[2];
+ uint8_t bfraction_lut_index;///< Index for BFRACTION value (see Table 40, reproduced into ff_vc1_bfraction_lut[])
+ uint8_t broken_link; ///< Broken link flag (BROKEN_LINK syntax element)
+ uint8_t closed_entry; ///< Closed entry point flag (CLOSED_ENTRY syntax element)
+
+ int parse_only; ///< Context is used within parser
+
+ int warn_interlaced;
} VC1Context;
-#endif /* FFMPEG_VC1_H */
+/** Find VC-1 marker in buffer
+ * @return position where next marker starts or end of buffer if no marker found
+ */
+static av_always_inline const uint8_t* find_next_marker(const uint8_t *src, const uint8_t *end)
+{
+ uint32_t mrk = 0xFFFFFFFF;
+
+ if(end-src < 4) return end;
+ while(src < end){
+ mrk = (mrk << 8) | *src++;
+ if(IS_MARKER(mrk))
+ return src-4;
+ }
+ return end;
+}
+
+static av_always_inline int vc1_unescape_buffer(const uint8_t *src, int size, uint8_t *dst)
+{
+ int dsize = 0, i;
+
+ if(size < 4){
+ for(dsize = 0; dsize < size; dsize++) *dst++ = *src++;
+ return size;
+ }
+ for(i = 0; i < size; i++, src++) {
+ if(src[0] == 3 && i >= 2 && !src[-1] && !src[-2] && i < size-1 && src[1] < 4) {
+ dst[dsize++] = src[1];
+ src++;
+ i++;
+ } else
+ dst[dsize++] = *src;
+ }
+ return dsize;
+}
+
+/**
+ * Decode Simple/Main Profiles sequence header
+ * @see Figure 7-8, p16-17
+ * @param avctx Codec context
+ * @param gb GetBit context initialized from Codec context extra_data
+ * @return Status
+ */
+int vc1_decode_sequence_header(AVCodecContext *avctx, VC1Context *v, GetBitContext *gb);
+
+int vc1_decode_entry_point(AVCodecContext *avctx, VC1Context *v, GetBitContext *gb);
+
+int vc1_parse_frame_header (VC1Context *v, GetBitContext *gb);
+int vc1_parse_frame_header_adv(VC1Context *v, GetBitContext *gb);
+
+#endif /* AVCODEC_VC1_H */
projects / ffmpeg / blobdiff