#include "avcodec.h"
#include "mpegvideo.h"
+#include "intrax8.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,
/** The VC1 Context
- * @fixme Change size wherever another size is more efficient
+ * @todo Change size wherever another size is more efficient
* Many members are only used for Advanced Profile
*/
typedef struct VC1Context{
MpegEncContext s;
+ IntraX8Context x8;
int bits;
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
+ 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 p_frame_skipped;
int bi_type;
+ int x8_type;
+
+ uint32_t *cbp_base, *cbp;
+ 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
+/** 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 */