38 int poc,
int poc1,
int i)
41 int td = av_clip_int8(poc1 - poc0);
45 int tb = av_clip_int8(poc - poc0);
46 int tx = (16384 + (
FFABS(td) >> 1)) /
td;
47 return av_clip_intp2((tb * tx + 32) >> 6, 10);
60 for (field = 0; field < 2; field++) {
63 for (i = 0; i < 2 * sl->
ref_count[0]; i++)
73 int map[2][16 + 32],
int list,
74 int field,
int colfield,
int mbafi)
77 int j, old_ref, rfield;
78 int start = mbafi ? 16 : 0;
83 memset(map[list], 0,
sizeof(map[list]));
85 for (rfield = 0; rfield < 2; rfield++) {
86 for (old_ref = 0; old_ref < ref1->
ref_count[colfield][list]; old_ref++) {
87 int poc = ref1->
ref_poc[colfield][list][old_ref];
92 else if (interl && (poc & 3) == 3)
93 poc = (poc & ~3) + rfield + 1;
95 for (j = start; j <
end; j++) {
98 int cur_ref = mbafi ? (j - 16) ^ field : j;
100 map[list][2 * old_ref + (rfield ^ field) + 16] = cur_ref;
101 if (rfield == field || !interl)
102 map[list][old_ref] = cur_ref;
116 int ref1sidx = (ref1->
reference & 1) ^ 1;
118 for (list = 0; list < sl->
list_count; list++) {
120 for (j = 0; j < sl->
ref_count[list]; j++)
140 if (col_poc[0] == INT_MAX && col_poc[1] == INT_MAX) {
145 FFABS(col_poc[1] - cur_poc));
157 for (list = 0; list < 2; list++) {
160 for (field = 0; field < 2; field++)
171 int ref_height = 16 * h->
mb_height >> ref_field_picture;
180 FFMIN(16 * mb_y >> ref_field_picture,
182 ref_field_picture && ref_field);
192 const int16_t (*l1mv0)[2], (*l1mv1)[2];
193 const int8_t *l1ref0, *l1ref1;
194 const int is_b8x8 =
IS_8X8(*mb_type);
206 #define MB_TYPE_16x16_OR_INTRA (MB_TYPE_16x16 | MB_TYPE_INTRA4x4 | \
207 MB_TYPE_INTRA16x16 | MB_TYPE_INTRA_PCM)
210 for (list = 0; list < 2; list++) {
219 ref[list] =
FFMIN3((
unsigned)left_ref,
222 if (ref[list] >= 0) {
228 int match_count = (left_ref == ref[list]) +
229 (top_ref == ref[list]) +
232 if (match_count > 1) {
236 assert(match_count == 1);
237 if (left_ref == ref[list])
239 else if (top_ref == ref[list])
254 if (ref[0] < 0 && ref[1] < 0) {
261 if (!(is_b8x8 | mv[0] | mv[1])) {
285 mb_y = sl->
mb_y & ~1;
313 }
else if (!is_b8x8 &&
338 l1mv0 += 2 * b4_stride;
339 l1mv1 += 2 * b4_stride;
345 for (i8 = 0; i8 < 4; i8++) {
348 int xy8 = x8 + y8 * b8_stride;
349 int xy4 = x8 * 3 + y8 * b4_stride;
361 ((l1ref0[xy8] == 0 &&
362 FFABS(l1mv0[xy4][0]) <= 1 &&
363 FFABS(l1mv0[xy4][1]) <= 1) ||
366 FFABS(l1mv1[xy4][0]) <= 1 &&
367 FFABS(l1mv1[xy4][1]) <= 1))) {
382 if (!is_b8x8 && !(n & 3))
393 FFABS(l1mv0[0][0]) <= 1 &&
394 FFABS(l1mv0[0][1]) <= 1) ||
395 (l1ref0[0] < 0 && !l1ref1[0] &&
396 FFABS(l1mv1[0][0]) <= 1 &&
397 FFABS(l1mv1[0][1]) <= 1 &&
412 for (i8 = 0; i8 < 4; i8++) {
413 const int x8 = i8 & 1;
414 const int y8 = i8 >> 1;
427 assert(b8_stride == 2);
434 const int16_t (*l1mv)[2] = l1ref0[i8] == 0 ? l1mv0 : l1mv1;
436 const int16_t *mv_col = l1mv[x8 * 3 + y8 * 3 * b4_stride];
437 if (
FFABS(mv_col[0]) <= 1 &&
FFABS(mv_col[1]) <= 1) {
448 for (i4 = 0; i4 < 4; i4++) {
449 const int16_t *mv_col = l1mv[x8 * 2 + (i4 & 1) +
450 (y8 * 2 + (i4 >> 1)) * b4_stride];
451 if (
FFABS(mv_col[0]) <= 1 &&
FFABS(mv_col[1]) <= 1) {
465 if (!is_b8x8 && !(n & 15))
479 const int16_t (*l1mv0)[2], (*l1mv1)[2];
480 const int8_t *l1ref0, *l1ref1;
481 const int is_b8x8 =
IS_8X8(*mb_type);
482 unsigned int sub_mb_type;
503 mb_y = sl->
mb_y & ~1;
536 }
else if (!is_b8x8 &&
562 l1mv0 += 2 * b4_stride;
563 l1mv1 += 2 * b4_stride;
584 for (i8 = 0; i8 < 4; i8++) {
585 const int x8 = i8 & 1;
586 const int y8 = i8 >> 1;
588 const int16_t (*l1mv)[2] = l1mv0;
602 ref0 = l1ref0[x8 + y8 * b8_stride];
604 ref0 = map_col_to_list0[0][ref0 + ref_offset];
606 ref0 = map_col_to_list0[1][l1ref1[x8 + y8 * b8_stride] +
610 scale = dist_scale_factor[ref0];
615 const int16_t *mv_col = l1mv[x8 * 3 + y8 * b4_stride];
616 int my_col = (mv_col[1] << y_shift) / 2;
617 int mx = (scale * mv_col[0] + 128) >> 8;
618 int my = (scale * my_col + 128) >> 8;
637 const int ref0 = l1ref0[0] >= 0 ? map_col_to_list0[0][l1ref0[0] + ref_offset]
638 : map_col_to_list0[1][l1ref1[0] + ref_offset];
639 const int scale = dist_scale_factor[ref0];
640 const int16_t *mv_col = l1ref0[0] >= 0 ? l1mv0[0] : l1mv1[0];
642 mv_l0[0] = (scale * mv_col[0] + 128) >> 8;
643 mv_l0[1] = (scale * mv_col[1] + 128) >> 8;
646 mv1 =
pack16to32(mv_l0[0] - mv_col[0], mv_l0[1] - mv_col[1]);
652 for (i8 = 0; i8 < 4; i8++) {
653 const int x8 = i8 & 1;
654 const int y8 = i8 >> 1;
656 const int16_t (*l1mv)[2] = l1mv0;
669 assert(b8_stride == 2);
672 ref0 = map_col_to_list0[0][ref0 + ref_offset];
674 ref0 = map_col_to_list0[1][l1ref1[i8] + ref_offset];
677 scale = dist_scale_factor[ref0];
682 const int16_t *mv_col = l1mv[x8 * 3 + y8 * 3 * b4_stride];
683 int mx = (scale * mv_col[0] + 128) >> 8;
684 int my = (scale * mv_col[1] + 128) >> 8;
688 pack16to32(mx - mv_col[0], my - mv_col[1]), 4);
690 for (i4 = 0; i4 < 4; i4++) {
691 const int16_t *mv_col = l1mv[x8 * 2 + (i4 & 1) +
692 (y8 * 2 + (i4 >> 1)) * b4_stride];
694 mv_l0[0] = (scale * mv_col[0] + 128) >> 8;
695 mv_l0[1] = (scale * mv_col[1] + 128) >> 8;
698 mv_l0[1] - mv_col[1]));
static void pred_spatial_direct_motion(const H264Context *const h, H264SliceContext *sl, int *mb_type)
int long_ref
1->long term reference 0->short term reference
int16_t mv_cache[2][5 *8][2]
Motion vector cache.
int dist_scale_factor[32]
int16_t(*[2] motion_val)[2]
void ff_h264_pred_direct_motion(const H264Context *const h, H264SliceContext *sl, int *mb_type)
void ff_thread_await_progress(ThreadFrame *f, int n, int field)
Wait for earlier decoding threads to finish reference pictures.
unsigned int ref_count[2]
num_ref_idx_l0/1_active_minus1 + 1
uint16_t sub_mb_type[4]
as a dct coefficient is int32_t in high depth, we need to reserve twice the space.
#define av_assert2(cond)
assert() equivalent, that does lie in speed critical code.
int field_picture
whether or not picture was encoded in separate fields
static av_cold int end(AVCodecContext *avctx)
Multithreading support functions.
int map_col_to_list0_field[2][2][16+32]
#define PICT_BOTTOM_FIELD
static void fill_rectangle(SDL_Surface *screen, int x, int y, int w, int h, int color, int update)
void ff_h264_direct_ref_list_init(const H264Context *const h, H264SliceContext *sl)
H.264 / AVC / MPEG4 part10 codec.
static void await_reference_mb_row(const H264Context *const h, H264Ref *ref, int mb_y)
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
static const uint16_t mask[17]
int map_col_to_list0[2][16+32]
int active_thread_type
Which multithreading methods are in use by the codec.
int ref_poc[2][2][32]
POCs of the frames/fields used as reference (FIXME need per slice)
int direct_spatial_mv_pred
int frame_num
frame_num (raw frame_num from slice header)
static av_always_inline uint32_t pack16to32(unsigned a, unsigned b)
#define MB_TYPE_16x16_OR_INTRA
int slice_type_nos
S free slice type (SI/SP are remapped to I/P)
static const uint8_t scan8[16 *3+3]
useful rectangle filling function
#define FF_THREAD_FRAME
Decode more than one frame at once.
static void pred_temp_direct_motion(const H264Context *const h, H264SliceContext *sl, int *mb_type)
#define MB_TYPE_INTERLACED
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
int direct_8x8_inference_flag
#define PART_NOT_AVAILABLE
static int get_scale_factor(H264SliceContext *sl, int poc, int poc1, int i)
static const int8_t mv[256][2]
Libavcodec external API header.
int field_poc[2]
top/bottom POC
H264Picture * cur_pic_ptr
static void fill_colmap(const H264Context *h, H264SliceContext *sl, int map[2][16+32], int list, int field, int colfield, int mbafi)
int mbaff
1 -> MBAFF frame 0-> not MBAFF
common internal api header.
int8_t ref_cache[2][5 *8]
H264Ref ref_list[2][48]
0..15: frame refs, 16..47: mbaff field refs.
int ref_count[2][2]
number of entries in ref_poc (FIXME need per slice)
int dist_scale_factor_field[2][32]
void ff_h264_direct_dist_scale_factor(const H264Context *const h, H264SliceContext *sl)