diff options
Diffstat (limited to 'libavcodec/h264_slice.c')
| -rw-r--r-- | libavcodec/h264_slice.c | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/libavcodec/h264_slice.c b/libavcodec/h264_slice.c index ec8a82c0a6..6a89a416ac 100644 --- a/libavcodec/h264_slice.c +++ b/libavcodec/h264_slice.c @@ -26,7 +26,9 @@ */ #include "libavutil/avassert.h" +#include "libavutil/display.h" #include "libavutil/imgutils.h" +#include "libavutil/stereo3d.h" #include "libavutil/timer.h" #include "internal.h" #include "cabac.h" @@ -984,6 +986,161 @@ static int h264_init_ps(H264Context *h, const H264SliceContext *sl) return 0; } +static int h264_export_frame_props(H264Context *h) +{ + const SPS *sps = h->ps.sps; + H264Picture *cur = h->cur_pic_ptr; + + cur->f->interlaced_frame = 0; + cur->f->repeat_pict = 0; + + /* Signal interlacing information externally. */ + /* Prioritize picture timing SEI information over used + * decoding process if it exists. */ + + if (sps->pic_struct_present_flag) { + H264SEIPictureTiming *pt = &h->sei.picture_timing; + switch (pt->pic_struct) { + case SEI_PIC_STRUCT_FRAME: + break; + case SEI_PIC_STRUCT_TOP_FIELD: + case SEI_PIC_STRUCT_BOTTOM_FIELD: + cur->f->interlaced_frame = 1; + break; + case SEI_PIC_STRUCT_TOP_BOTTOM: + case SEI_PIC_STRUCT_BOTTOM_TOP: + if (FIELD_OR_MBAFF_PICTURE(h)) + cur->f->interlaced_frame = 1; + else + // try to flag soft telecine progressive + cur->f->interlaced_frame = h->prev_interlaced_frame; + break; + case SEI_PIC_STRUCT_TOP_BOTTOM_TOP: + case SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM: + /* Signal the possibility of telecined film externally + * (pic_struct 5,6). From these hints, let the applications + * decide if they apply deinterlacing. */ + cur->f->repeat_pict = 1; + break; + case SEI_PIC_STRUCT_FRAME_DOUBLING: + cur->f->repeat_pict = 2; + break; + case SEI_PIC_STRUCT_FRAME_TRIPLING: + cur->f->repeat_pict = 4; + break; + } + + if ((pt->ct_type & 3) && + pt->pic_struct <= SEI_PIC_STRUCT_BOTTOM_TOP) + cur->f->interlaced_frame = (pt->ct_type & (1 << 1)) != 0; + } else { + /* Derive interlacing flag from used decoding process. */ + cur->f->interlaced_frame = FIELD_OR_MBAFF_PICTURE(h); + } + h->prev_interlaced_frame = cur->f->interlaced_frame; + + if (cur->field_poc[0] != cur->field_poc[1]) { + /* Derive top_field_first from field pocs. */ + cur->f->top_field_first = cur->field_poc[0] < cur->field_poc[1]; + } else { + if (cur->f->interlaced_frame || sps->pic_struct_present_flag) { + /* Use picture timing SEI information. Even if it is a + * information of a past frame, better than nothing. */ + if (h->sei.picture_timing.pic_struct == SEI_PIC_STRUCT_TOP_BOTTOM || + h->sei.picture_timing.pic_struct == SEI_PIC_STRUCT_TOP_BOTTOM_TOP) + cur->f->top_field_first = 1; + else + cur->f->top_field_first = 0; + } else { + /* Most likely progressive */ + cur->f->top_field_first = 0; + } + } + + if (h->sei.frame_packing.present && + h->sei.frame_packing.arrangement_type >= 0 && + h->sei.frame_packing.arrangement_type <= 6 && + h->sei.frame_packing.content_interpretation_type > 0 && + h->sei.frame_packing.content_interpretation_type < 3) { + H264SEIFramePacking *fp = &h->sei.frame_packing; + AVStereo3D *stereo = av_stereo3d_create_side_data(cur->f); + if (!stereo) + return AVERROR(ENOMEM); + + switch (fp->arrangement_type) { + case 0: + stereo->type = AV_STEREO3D_CHECKERBOARD; + break; + case 1: + stereo->type = AV_STEREO3D_COLUMNS; + break; + case 2: + stereo->type = AV_STEREO3D_LINES; + break; + case 3: + if (fp->quincunx_subsampling) + stereo->type = AV_STEREO3D_SIDEBYSIDE_QUINCUNX; + else + stereo->type = AV_STEREO3D_SIDEBYSIDE; + break; + case 4: + stereo->type = AV_STEREO3D_TOPBOTTOM; + break; + case 5: + stereo->type = AV_STEREO3D_FRAMESEQUENCE; + break; + case 6: + stereo->type = AV_STEREO3D_2D; + break; + } + + if (fp->content_interpretation_type == 2) + stereo->flags = AV_STEREO3D_FLAG_INVERT; + } + + if (h->sei.display_orientation.present && + (h->sei.display_orientation.anticlockwise_rotation || + h->sei.display_orientation.hflip || + h->sei.display_orientation.vflip)) { + H264SEIDisplayOrientation *o = &h->sei.display_orientation; + double angle = o->anticlockwise_rotation * 360 / (double) (1 << 16); + AVFrameSideData *rotation = av_frame_new_side_data(cur->f, + AV_FRAME_DATA_DISPLAYMATRIX, + sizeof(int32_t) * 9); + if (!rotation) + return AVERROR(ENOMEM); + + av_display_rotation_set((int32_t *)rotation->data, angle); + av_display_matrix_flip((int32_t *)rotation->data, + o->hflip, o->vflip); + } + + if (h->sei.afd.present) { + AVFrameSideData *sd = av_frame_new_side_data(cur->f, AV_FRAME_DATA_AFD, + sizeof(uint8_t)); + if (!sd) + return AVERROR(ENOMEM); + + *sd->data = h->sei.afd.active_format_description; + h->sei.afd.present = 0; + } + + if (h->sei.a53_caption.a53_caption) { + H264SEIA53Caption *a53 = &h->sei.a53_caption; + AVFrameSideData *sd = av_frame_new_side_data(cur->f, + AV_FRAME_DATA_A53_CC, + a53->a53_caption_size); + if (!sd) + return AVERROR(ENOMEM); + + memcpy(sd->data, a53->a53_caption, a53->a53_caption_size); + av_freep(&a53->a53_caption); + a53->a53_caption_size = 0; + } + + return 0; +} + /* This function is called right after decoding the slice header for a first * slice in a field (or a frame). It decides whether we are decoding a new frame * or a second field in a pair and does the necessary setup. @@ -1174,6 +1331,15 @@ static int h264_field_start(H264Context *h, const H264SliceContext *sl, h->nb_mmco = sl->nb_mmco; h->explicit_ref_marking = sl->explicit_ref_marking; + /* Set the frame properties/side data. Only done for the second field in + * field coded frames, since some SEI information is present for each field + * and is merged by the SEI parsing code. */ + if (!FIELD_PICTURE(h) || !h->first_field) { + ret = h264_export_frame_props(h); + if (ret < 0) + return ret; + } + return 0; } |