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author | Andreas Rheinhardt <andreas.rheinhardt@outlook.com> | 2022-01-27 23:32:49 +0100 |
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committer | Andreas Rheinhardt <andreas.rheinhardt@outlook.com> | 2022-02-13 15:27:48 +0100 |
commit | cc90478967431d046b2d930a60be15e81c7d0e12 (patch) | |
tree | a4af17069bfc6b4a3ed819cfdb51c7cf28b366e3 /libavcodec/wmv2dec.c | |
parent | 584f26db0d8e4a2d34ec027b6bc70a9b2eb14926 (diff) | |
download | ffmpeg-cc90478967431d046b2d930a60be15e81c7d0e12.tar.gz |
avcodec/wmv2: Split Wmv2Context into decoder and encoder context
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
Diffstat (limited to 'libavcodec/wmv2dec.c')
-rw-r--r-- | libavcodec/wmv2dec.c | 64 |
1 files changed, 45 insertions, 19 deletions
diff --git a/libavcodec/wmv2dec.c b/libavcodec/wmv2dec.c index dd0e2683f5..f9d91f9571 100644 --- a/libavcodec/wmv2dec.c +++ b/libavcodec/wmv2dec.c @@ -18,6 +18,8 @@ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ +#include "libavutil/mem_internal.h" + #include "avcodec.h" #include "h263dec.h" #include "internal.h" @@ -31,8 +33,28 @@ #include "wmv2.h" #include "wmv2data.h" - -static void wmv2_add_block(Wmv2Context *w, int16_t *block1, +typedef struct WMV2DecContext { + MpegEncContext s; + WMV2Context common; + IntraX8Context x8; + int j_type_bit; + int j_type; + int abt_flag; + int abt_type; + int abt_type_table[6]; + int per_mb_abt; + int per_block_abt; + int mspel_bit; + int cbp_table_index; + int top_left_mv_flag; + int per_mb_rl_bit; + int skip_type; + + ScanTable abt_scantable[2]; + DECLARE_ALIGNED(32, int16_t, abt_block2)[6][64]; +} WMV2DecContext; + +static void wmv2_add_block(WMV2DecContext *w, int16_t *block1, uint8_t *dst, int stride, int n) { MpegEncContext *const s = &w->s; @@ -40,7 +62,7 @@ static void wmv2_add_block(Wmv2Context *w, int16_t *block1, if (s->block_last_index[n] >= 0) { switch (w->abt_type_table[n]) { case 0: - w->wdsp.idct_add(dst, stride, block1); + w->common.wdsp.idct_add(dst, stride, block1); break; case 1: ff_simple_idct84_add(dst, stride, block1); @@ -61,7 +83,7 @@ static void wmv2_add_block(Wmv2Context *w, int16_t *block1, void ff_wmv2_add_mb(MpegEncContext *s, int16_t block1[6][64], uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr) { - Wmv2Context *const w = (Wmv2Context *) s; + WMV2DecContext *const w = (WMV2DecContext *) s; wmv2_add_block(w, block1[0], dest_y, s->linesize, 0); wmv2_add_block(w, block1[1], dest_y + 8, s->linesize, 1); @@ -75,7 +97,7 @@ void ff_wmv2_add_mb(MpegEncContext *s, int16_t block1[6][64], wmv2_add_block(w, block1[5], dest_cr, s->uvlinesize, 5); } -static int parse_mb_skip(Wmv2Context *w) +static int parse_mb_skip(WMV2DecContext *w) { int mb_x, mb_y; int coded_mb_count = 0; @@ -140,7 +162,7 @@ static int parse_mb_skip(Wmv2Context *w) return 0; } -static int decode_ext_header(Wmv2Context *w) +static int decode_ext_header(WMV2DecContext *w) { MpegEncContext *const s = &w->s; GetBitContext gb; @@ -180,7 +202,7 @@ static int decode_ext_header(Wmv2Context *w) int ff_wmv2_decode_picture_header(MpegEncContext *s) { - Wmv2Context *const w = (Wmv2Context *) s; + WMV2DecContext *const w = (WMV2DecContext *) s; int code; if (s->picture_number == 0) @@ -215,7 +237,7 @@ int ff_wmv2_decode_picture_header(MpegEncContext *s) int ff_wmv2_decode_secondary_picture_header(MpegEncContext *s) { - Wmv2Context *const w = (Wmv2Context *) s; + WMV2DecContext *const w = (WMV2DecContext *) s; if (s->pict_type == AV_PICTURE_TYPE_I) { if (w->j_type_bit) @@ -323,19 +345,19 @@ int ff_wmv2_decode_secondary_picture_header(MpegEncContext *s) return 0; } -static inline void wmv2_decode_motion(Wmv2Context *w, int *mx_ptr, int *my_ptr) +static inline void wmv2_decode_motion(WMV2DecContext *w, int *mx_ptr, int *my_ptr) { MpegEncContext *const s = &w->s; ff_msmpeg4_decode_motion(s, mx_ptr, my_ptr); if ((((*mx_ptr) | (*my_ptr)) & 1) && s->mspel) - w->hshift = get_bits1(&s->gb); + w->common.hshift = get_bits1(&s->gb); else - w->hshift = 0; + w->common.hshift = 0; } -static int16_t *wmv2_pred_motion(Wmv2Context *w, int *px, int *py) +static int16_t *wmv2_pred_motion(WMV2DecContext *w, int *px, int *py) { MpegEncContext *const s = &w->s; int xy, wrap, diff, type; @@ -380,7 +402,7 @@ static int16_t *wmv2_pred_motion(Wmv2Context *w, int *px, int *py) return mot_val; } -static inline int wmv2_decode_inter_block(Wmv2Context *w, int16_t *block, +static inline int wmv2_decode_inter_block(WMV2DecContext *w, int16_t *block, int n, int cbp) { MpegEncContext *const s = &w->s; @@ -422,7 +444,9 @@ static inline int wmv2_decode_inter_block(Wmv2Context *w, int16_t *block, int ff_wmv2_decode_mb(MpegEncContext *s, int16_t block[6][64]) { - Wmv2Context *const w = (Wmv2Context *) s; + /* The following is only allowed because this encoder + * does not use slice threading. */ + WMV2DecContext *const w = (WMV2DecContext *) s; int cbp, code, i, ret; uint8_t *coded_val; @@ -440,7 +464,7 @@ int ff_wmv2_decode_mb(MpegEncContext *s, int16_t block[6][64]) s->mv[0][0][0] = 0; s->mv[0][0][1] = 0; s->mb_skipped = 1; - w->hshift = 0; + w->common.hshift = 0; return 0; } if (get_bits_left(&s->gb) <= 0) @@ -537,14 +561,16 @@ int ff_wmv2_decode_mb(MpegEncContext *s, int16_t block[6][64]) static av_cold int wmv2_decode_init(AVCodecContext *avctx) { - Wmv2Context *const w = avctx->priv_data; + WMV2DecContext *const w = avctx->priv_data; MpegEncContext *const s = &w->s; int ret; + s->private_ctx = &w->common; + if ((ret = ff_msmpeg4_decode_init(avctx)) < 0) return ret; - ff_wmv2_common_init(w); + ff_wmv2_common_init(s); ff_init_scantable(s->idsp.idct_permutation, &w->abt_scantable[0], ff_wmv2_scantableA); ff_init_scantable(s->idsp.idct_permutation, &w->abt_scantable[1], @@ -557,7 +583,7 @@ static av_cold int wmv2_decode_init(AVCodecContext *avctx) static av_cold int wmv2_decode_end(AVCodecContext *avctx) { - Wmv2Context *w = avctx->priv_data; + WMV2DecContext *const w = avctx->priv_data; ff_intrax8_common_end(&w->x8); return ff_h263_decode_end(avctx); @@ -568,7 +594,7 @@ const AVCodec ff_wmv2_decoder = { .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 8"), .type = AVMEDIA_TYPE_VIDEO, .id = AV_CODEC_ID_WMV2, - .priv_data_size = sizeof(Wmv2Context), + .priv_data_size = sizeof(WMV2DecContext), .init = wmv2_decode_init, .close = wmv2_decode_end, .decode = ff_h263_decode_frame, |