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Diffstat (limited to 'libavfilter/vf_tinterlace.c')
| -rw-r--r-- | libavfilter/vf_tinterlace.c | 527 |
1 files changed, 527 insertions, 0 deletions
diff --git a/libavfilter/vf_tinterlace.c b/libavfilter/vf_tinterlace.c new file mode 100644 index 0000000000..f13791d254 --- /dev/null +++ b/libavfilter/vf_tinterlace.c @@ -0,0 +1,527 @@ +/* + * Copyright (c) 2017 Thomas Mundt <tmundt75@gmail.com> + * Copyright (c) 2011 Stefano Sabatini + * Copyright (c) 2010 Baptiste Coudurier + * Copyright (c) 2003 Michael Zucchi <notzed@ximian.com> + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * FFmpeg 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with FFmpeg if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +/** + * @file + * temporal field interlace filter, ported from MPlayer/libmpcodecs + */ + +#include "libavutil/opt.h" +#include "libavutil/imgutils.h" +#include "libavutil/avassert.h" +#include "avfilter.h" +#include "internal.h" +#include "tinterlace.h" + +#define OFFSET(x) offsetof(TInterlaceContext, x) +#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM + +static const AVOption tinterlace_options[] = { + {"mode", "select interlace mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=MODE_MERGE}, 0, MODE_NB-1, FLAGS, "mode"}, + {"merge", "merge fields", 0, AV_OPT_TYPE_CONST, {.i64=MODE_MERGE}, INT_MIN, INT_MAX, FLAGS, "mode"}, + {"drop_even", "drop even fields", 0, AV_OPT_TYPE_CONST, {.i64=MODE_DROP_EVEN}, INT_MIN, INT_MAX, FLAGS, "mode"}, + {"drop_odd", "drop odd fields", 0, AV_OPT_TYPE_CONST, {.i64=MODE_DROP_ODD}, INT_MIN, INT_MAX, FLAGS, "mode"}, + {"pad", "pad alternate lines with black", 0, AV_OPT_TYPE_CONST, {.i64=MODE_PAD}, INT_MIN, INT_MAX, FLAGS, "mode"}, + {"interleave_top", "interleave top and bottom fields", 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE_TOP}, INT_MIN, INT_MAX, FLAGS, "mode"}, + {"interleave_bottom", "interleave bottom and top fields", 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE_BOTTOM}, INT_MIN, INT_MAX, FLAGS, "mode"}, + {"interlacex2", "interlace fields from two consecutive frames", 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLACEX2}, INT_MIN, INT_MAX, FLAGS, "mode"}, + {"mergex2", "merge fields keeping same frame rate", 0, AV_OPT_TYPE_CONST, {.i64=MODE_MERGEX2}, INT_MIN, INT_MAX, FLAGS, "mode"}, + + {"flags", "set flags", OFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, 0, INT_MAX, 0, "flags" }, + {"low_pass_filter", "enable vertical low-pass filter", 0, AV_OPT_TYPE_CONST, {.i64 = TINTERLACE_FLAG_VLPF}, INT_MIN, INT_MAX, FLAGS, "flags" }, + {"vlpf", "enable vertical low-pass filter", 0, AV_OPT_TYPE_CONST, {.i64 = TINTERLACE_FLAG_VLPF}, INT_MIN, INT_MAX, FLAGS, "flags" }, + {"complex_filter", "enable complex vertical low-pass filter", 0, AV_OPT_TYPE_CONST, {.i64 = TINTERLACE_FLAG_CVLPF},INT_MIN, INT_MAX, FLAGS, "flags" }, + {"cvlpf", "enable complex vertical low-pass filter", 0, AV_OPT_TYPE_CONST, {.i64 = TINTERLACE_FLAG_CVLPF},INT_MIN, INT_MAX, FLAGS, "flags" }, + {"exact_tb", "force a timebase which can represent timestamps exactly", 0, AV_OPT_TYPE_CONST, {.i64 = TINTERLACE_FLAG_EXACT_TB}, INT_MIN, INT_MAX, FLAGS, "flags" }, + + {NULL} +}; + +AVFILTER_DEFINE_CLASS(tinterlace); + +#define FULL_SCALE_YUVJ_FORMATS \ + AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P + +static const enum AVPixelFormat full_scale_yuvj_pix_fmts[] = { + FULL_SCALE_YUVJ_FORMATS, AV_PIX_FMT_NONE +}; + +static const AVRational standard_tbs[] = { + {1, 25}, + {1, 30}, + {1001, 30000}, +}; + +static int query_formats(AVFilterContext *ctx) +{ + static const enum AVPixelFormat pix_fmts[] = { + AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P, + AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, + AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P, + AV_PIX_FMT_YUV420P10LE, AV_PIX_FMT_YUV422P10LE, + AV_PIX_FMT_YUV440P10LE, AV_PIX_FMT_YUV444P10LE, + AV_PIX_FMT_YUV420P12LE, AV_PIX_FMT_YUV422P12LE, + AV_PIX_FMT_YUV440P12LE, AV_PIX_FMT_YUV444P12LE, + AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P, + AV_PIX_FMT_YUVA420P10LE, AV_PIX_FMT_YUVA422P10LE, AV_PIX_FMT_YUVA444P10LE, + AV_PIX_FMT_GRAY8, FULL_SCALE_YUVJ_FORMATS, + AV_PIX_FMT_NONE + }; + + AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts); + if (!fmts_list) + return AVERROR(ENOMEM); + return ff_set_common_formats(ctx, fmts_list); +} + +static void lowpass_line_c(uint8_t *dstp, ptrdiff_t width, const uint8_t *srcp, + ptrdiff_t mref, ptrdiff_t pref, int clip_max) +{ + const uint8_t *srcp_above = srcp + mref; + const uint8_t *srcp_below = srcp + pref; + int i; + for (i = 0; i < width; i++) { + // this calculation is an integer representation of + // '0.5 * current + 0.25 * above + 0.25 * below' + // '1 +' is for rounding. + dstp[i] = (1 + srcp[i] + srcp[i] + srcp_above[i] + srcp_below[i]) >> 2; + } +} + +static void lowpass_line_c_16(uint8_t *dst8, ptrdiff_t width, const uint8_t *src8, + ptrdiff_t mref, ptrdiff_t pref, int clip_max) +{ + uint16_t *dstp = (uint16_t *)dst8; + const uint16_t *srcp = (const uint16_t *)src8; + const uint16_t *srcp_above = srcp + mref / 2; + const uint16_t *srcp_below = srcp + pref / 2; + int i, src_x; + for (i = 0; i < width; i++) { + // this calculation is an integer representation of + // '0.5 * current + 0.25 * above + 0.25 * below' + // '1 +' is for rounding. + src_x = av_le2ne16(srcp[i]) << 1; + dstp[i] = av_le2ne16((1 + src_x + av_le2ne16(srcp_above[i]) + + av_le2ne16(srcp_below[i])) >> 2); + } +} + +static void lowpass_line_complex_c(uint8_t *dstp, ptrdiff_t width, const uint8_t *srcp, + ptrdiff_t mref, ptrdiff_t pref, int clip_max) +{ + const uint8_t *srcp_above = srcp + mref; + const uint8_t *srcp_below = srcp + pref; + const uint8_t *srcp_above2 = srcp + mref * 2; + const uint8_t *srcp_below2 = srcp + pref * 2; + int i, src_x, src_ab; + for (i = 0; i < width; i++) { + // this calculation is an integer representation of + // '0.75 * current + 0.25 * above + 0.25 * below - 0.125 * above2 - 0.125 * below2' + // '4 +' is for rounding. + src_x = srcp[i] << 1; + src_ab = srcp_above[i] + srcp_below[i]; + dstp[i] = av_clip_uint8((4 + ((srcp[i] + src_x + src_ab) << 1) + - srcp_above2[i] - srcp_below2[i]) >> 3); + // Prevent over-sharpening: + // dst must not exceed src when the average of above and below + // is less than src. And the other way around. + if (src_ab > src_x) { + if (dstp[i] < srcp[i]) + dstp[i] = srcp[i]; + } else if (dstp[i] > srcp[i]) + dstp[i] = srcp[i]; + } +} + +static void lowpass_line_complex_c_16(uint8_t *dst8, ptrdiff_t width, const uint8_t *src8, + ptrdiff_t mref, ptrdiff_t pref, int clip_max) +{ + uint16_t *dstp = (uint16_t *)dst8; + const uint16_t *srcp = (const uint16_t *)src8; + const uint16_t *srcp_above = srcp + mref / 2; + const uint16_t *srcp_below = srcp + pref / 2; + const uint16_t *srcp_above2 = srcp + mref; + const uint16_t *srcp_below2 = srcp + pref; + int i, dst_le, src_le, src_x, src_ab; + for (i = 0; i < width; i++) { + // this calculation is an integer representation of + // '0.75 * current + 0.25 * above + 0.25 * below - 0.125 * above2 - 0.125 * below2' + // '4 +' is for rounding. + src_le = av_le2ne16(srcp[i]); + src_x = src_le << 1; + src_ab = av_le2ne16(srcp_above[i]) + av_le2ne16(srcp_below[i]); + dst_le = av_clip((4 + ((src_le + src_x + src_ab) << 1) + - av_le2ne16(srcp_above2[i]) + - av_le2ne16(srcp_below2[i])) >> 3, 0, clip_max); + // Prevent over-sharpening: + // dst must not exceed src when the average of above and below + // is less than src. And the other way around. + if (src_ab > src_x) { + if (dst_le < src_le) + dstp[i] = av_le2ne16(src_le); + else + dstp[i] = av_le2ne16(dst_le); + } else if (dst_le > src_le) { + dstp[i] = av_le2ne16(src_le); + } else + dstp[i] = av_le2ne16(dst_le); + } +} + +static av_cold void uninit(AVFilterContext *ctx) +{ + TInterlaceContext *tinterlace = ctx->priv; + + av_frame_free(&tinterlace->cur ); + av_frame_free(&tinterlace->next); + av_freep(&tinterlace->black_data[0]); +} + +static int config_out_props(AVFilterLink *outlink) +{ + AVFilterContext *ctx = outlink->src; + AVFilterLink *inlink = outlink->src->inputs[0]; + const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(outlink->format); + TInterlaceContext *tinterlace = ctx->priv; + int i; + + tinterlace->vsub = desc->log2_chroma_h; + outlink->w = inlink->w; + outlink->h = tinterlace->mode == MODE_MERGE || tinterlace->mode == MODE_PAD || tinterlace->mode == MODE_MERGEX2? + inlink->h*2 : inlink->h; + if (tinterlace->mode == MODE_MERGE || tinterlace->mode == MODE_PAD || tinterlace->mode == MODE_MERGEX2) + outlink->sample_aspect_ratio = av_mul_q(inlink->sample_aspect_ratio, + av_make_q(2, 1)); + + if (tinterlace->mode == MODE_PAD) { + uint8_t black[4] = { 0, 0, 0, 16 }; + int ret; + ff_draw_init(&tinterlace->draw, outlink->format, 0); + ff_draw_color(&tinterlace->draw, &tinterlace->color, black); + if (ff_fmt_is_in(outlink->format, full_scale_yuvj_pix_fmts)) + tinterlace->color.comp[0].u8[0] = 0; + ret = av_image_alloc(tinterlace->black_data, tinterlace->black_linesize, + outlink->w, outlink->h, outlink->format, 16); + if (ret < 0) + return ret; + + ff_fill_rectangle(&tinterlace->draw, &tinterlace->color, tinterlace->black_data, + tinterlace->black_linesize, 0, 0, outlink->w, outlink->h); + } + if (tinterlace->flags & (TINTERLACE_FLAG_VLPF | TINTERLACE_FLAG_CVLPF) + && !(tinterlace->mode == MODE_INTERLEAVE_TOP + || tinterlace->mode == MODE_INTERLEAVE_BOTTOM)) { + av_log(ctx, AV_LOG_WARNING, "low_pass_filter flags ignored with mode %d\n", + tinterlace->mode); + tinterlace->flags &= ~(TINTERLACE_FLAG_VLPF | TINTERLACE_FLAG_CVLPF); + } + tinterlace->preout_time_base = inlink->time_base; + if (tinterlace->mode == MODE_INTERLACEX2) { + tinterlace->preout_time_base.den *= 2; + outlink->frame_rate = av_mul_q(inlink->frame_rate, (AVRational){2,1}); + outlink->time_base = av_mul_q(inlink->time_base , (AVRational){1,2}); + } else if (tinterlace->mode == MODE_MERGEX2) { + outlink->frame_rate = inlink->frame_rate; + outlink->time_base = inlink->time_base; + } else if (tinterlace->mode != MODE_PAD) { + outlink->frame_rate = av_mul_q(inlink->frame_rate, (AVRational){1,2}); + outlink->time_base = av_mul_q(inlink->time_base , (AVRational){2,1}); + } + + for (i = 0; i<FF_ARRAY_ELEMS(standard_tbs); i++){ + if (!av_cmp_q(standard_tbs[i], outlink->time_base)) + break; + } + if (i == FF_ARRAY_ELEMS(standard_tbs) || + (tinterlace->flags & TINTERLACE_FLAG_EXACT_TB)) + outlink->time_base = tinterlace->preout_time_base; + + tinterlace->csp = av_pix_fmt_desc_get(outlink->format); + if (tinterlace->flags & TINTERLACE_FLAG_CVLPF) { + if (tinterlace->csp->comp[0].depth > 8) + tinterlace->lowpass_line = lowpass_line_complex_c_16; + else + tinterlace->lowpass_line = lowpass_line_complex_c; + if (ARCH_X86) + ff_tinterlace_init_x86(tinterlace); + } else if (tinterlace->flags & TINTERLACE_FLAG_VLPF) { + if (tinterlace->csp->comp[0].depth > 8) + tinterlace->lowpass_line = lowpass_line_c_16; + else + tinterlace->lowpass_line = lowpass_line_c; + if (ARCH_X86) + ff_tinterlace_init_x86(tinterlace); + } + + av_log(ctx, AV_LOG_VERBOSE, "mode:%d filter:%s h:%d -> h:%d\n", tinterlace->mode, + (tinterlace->flags & TINTERLACE_FLAG_CVLPF) ? "complex" : + (tinterlace->flags & TINTERLACE_FLAG_VLPF) ? "linear" : "off", + inlink->h, outlink->h); + + return 0; +} + +#define FIELD_UPPER 0 +#define FIELD_LOWER 1 +#define FIELD_UPPER_AND_LOWER 2 + +/** + * Copy picture field from src to dst. + * + * @param src_field copy from upper, lower field or both + * @param interleave leave a padding line between each copied line + * @param dst_field copy to upper or lower field, + * only meaningful when interleave is selected + * @param flags context flags + */ +static inline +void copy_picture_field(TInterlaceContext *tinterlace, + uint8_t *dst[4], int dst_linesize[4], + const uint8_t *src[4], int src_linesize[4], + enum AVPixelFormat format, int w, int src_h, + int src_field, int interleave, int dst_field, + int flags) +{ + const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(format); + int hsub = desc->log2_chroma_w; + int plane, vsub = desc->log2_chroma_h; + int k = src_field == FIELD_UPPER_AND_LOWER ? 1 : 2; + int h; + + for (plane = 0; plane < desc->nb_components; plane++) { + int lines = plane == 1 || plane == 2 ? AV_CEIL_RSHIFT(src_h, vsub) : src_h; + int cols = plane == 1 || plane == 2 ? AV_CEIL_RSHIFT( w, hsub) : w; + uint8_t *dstp = dst[plane]; + const uint8_t *srcp = src[plane]; + int srcp_linesize = src_linesize[plane] * k; + int dstp_linesize = dst_linesize[plane] * (interleave ? 2 : 1); + int clip_max = (1 << tinterlace->csp->comp[plane].depth) - 1; + + lines = (lines + (src_field == FIELD_UPPER)) / k; + if (src_field == FIELD_LOWER) + srcp += src_linesize[plane]; + if (interleave && dst_field == FIELD_LOWER) + dstp += dst_linesize[plane]; + // Low-pass filtering is required when creating an interlaced destination from + // a progressive source which contains high-frequency vertical detail. + // Filtering will reduce interlace 'twitter' and Moire patterning. + if (flags & (TINTERLACE_FLAG_VLPF | TINTERLACE_FLAG_CVLPF)) { + int x = !!(flags & TINTERLACE_FLAG_CVLPF); + for (h = lines; h > 0; h--) { + ptrdiff_t pref = src_linesize[plane]; + ptrdiff_t mref = -pref; + if (h >= (lines - x)) mref = 0; // there is no line above + else if (h <= (1 + x)) pref = 0; // there is no line below + + tinterlace->lowpass_line(dstp, cols, srcp, mref, pref, clip_max); + dstp += dstp_linesize; + srcp += srcp_linesize; + } + } else { + if (tinterlace->csp->comp[plane].depth > 8) + cols *= 2; + av_image_copy_plane(dstp, dstp_linesize, srcp, srcp_linesize, cols, lines); + } + } +} + +static int filter_frame(AVFilterLink *inlink, AVFrame *picref) +{ + AVFilterContext *ctx = inlink->dst; + AVFilterLink *outlink = ctx->outputs[0]; + TInterlaceContext *tinterlace = ctx->priv; + AVFrame *cur, *next, *out; + int field, tff, ret; + + av_frame_free(&tinterlace->cur); + tinterlace->cur = tinterlace->next; + tinterlace->next = picref; + + cur = tinterlace->cur; + next = tinterlace->next; + /* we need at least two frames */ + if (!tinterlace->cur) + return 0; + + switch (tinterlace->mode) { + case MODE_MERGEX2: /* move the odd frame into the upper field of the new image, even into + * the lower field, generating a double-height video at same framerate */ + case MODE_MERGE: /* move the odd frame into the upper field of the new image, even into + * the lower field, generating a double-height video at half framerate */ + out = ff_get_video_buffer(outlink, outlink->w, outlink->h); + if (!out) + return AVERROR(ENOMEM); + av_frame_copy_props(out, cur); + out->height = outlink->h; + out->interlaced_frame = 1; + out->top_field_first = 1; + out->sample_aspect_ratio = av_mul_q(cur->sample_aspect_ratio, av_make_q(2, 1)); + + /* write odd frame lines into the upper field of the new frame */ + copy_picture_field(tinterlace, out->data, out->linesize, + (const uint8_t **)cur->data, cur->linesize, + inlink->format, inlink->w, inlink->h, + FIELD_UPPER_AND_LOWER, 1, tinterlace->mode == MODE_MERGEX2 ? inlink->frame_count_out & 1 ? FIELD_LOWER : FIELD_UPPER : FIELD_UPPER, tinterlace->flags); + /* write even frame lines into the lower field of the new frame */ + copy_picture_field(tinterlace, out->data, out->linesize, + (const uint8_t **)next->data, next->linesize, + inlink->format, inlink->w, inlink->h, + FIELD_UPPER_AND_LOWER, 1, tinterlace->mode == MODE_MERGEX2 ? inlink->frame_count_out & 1 ? FIELD_UPPER : FIELD_LOWER : FIELD_LOWER, tinterlace->flags); + if (tinterlace->mode != MODE_MERGEX2) + av_frame_free(&tinterlace->next); + break; + + case MODE_DROP_ODD: /* only output even frames, odd frames are dropped; height unchanged, half framerate */ + case MODE_DROP_EVEN: /* only output odd frames, even frames are dropped; height unchanged, half framerate */ + out = av_frame_clone(tinterlace->mode == MODE_DROP_EVEN ? cur : next); + if (!out) + return AVERROR(ENOMEM); + av_frame_free(&tinterlace->next); + break; + + case MODE_PAD: /* expand each frame to double height, but pad alternate + * lines with black; framerate unchanged */ + out = ff_get_video_buffer(outlink, outlink->w, outlink->h); + if (!out) + return AVERROR(ENOMEM); + av_frame_copy_props(out, cur); + out->height = outlink->h; + out->sample_aspect_ratio = av_mul_q(cur->sample_aspect_ratio, av_make_q(2, 1)); + + field = (1 + tinterlace->frame) & 1 ? FIELD_UPPER : FIELD_LOWER; + /* copy upper and lower fields */ + copy_picture_field(tinterlace, out->data, out->linesize, + (const uint8_t **)cur->data, cur->linesize, + inlink->format, inlink->w, inlink->h, + FIELD_UPPER_AND_LOWER, 1, field, tinterlace->flags); + /* pad with black the other field */ + copy_picture_field(tinterlace, out->data, out->linesize, + (const uint8_t **)tinterlace->black_data, tinterlace->black_linesize, + inlink->format, inlink->w, inlink->h, + FIELD_UPPER_AND_LOWER, 1, !field, tinterlace->flags); + break; + + /* interleave upper/lower lines from odd frames with lower/upper lines from even frames, + * halving the frame rate and preserving image height */ + case MODE_INTERLEAVE_TOP: /* top field first */ + case MODE_INTERLEAVE_BOTTOM: /* bottom field first */ + tff = tinterlace->mode == MODE_INTERLEAVE_TOP; + out = ff_get_video_buffer(outlink, outlink->w, outlink->h); + if (!out) + return AVERROR(ENOMEM); + av_frame_copy_props(out, cur); + out->interlaced_frame = 1; + out->top_field_first = tff; + + /* copy upper/lower field from cur */ + copy_picture_field(tinterlace, out->data, out->linesize, + (const uint8_t **)cur->data, cur->linesize, + inlink->format, inlink->w, inlink->h, + tff ? FIELD_UPPER : FIELD_LOWER, 1, tff ? FIELD_UPPER : FIELD_LOWER, + tinterlace->flags); + /* copy lower/upper field from next */ + copy_picture_field(tinterlace, out->data, out->linesize, + (const uint8_t **)next->data, next->linesize, + inlink->format, inlink->w, inlink->h, + tff ? FIELD_LOWER : FIELD_UPPER, 1, tff ? FIELD_LOWER : FIELD_UPPER, + tinterlace->flags); + av_frame_free(&tinterlace->next); + break; + case MODE_INTERLACEX2: /* re-interlace preserving image height, double frame rate */ + /* output current frame first */ + out = av_frame_clone(cur); + if (!out) + return AVERROR(ENOMEM); + out->interlaced_frame = 1; + if (cur->pts != AV_NOPTS_VALUE) + out->pts = cur->pts*2; + + out->pts = av_rescale_q(out->pts, tinterlace->preout_time_base, outlink->time_base); + if ((ret = ff_filter_frame(outlink, out)) < 0) + return ret; + + /* output mix of current and next frame */ + tff = next->top_field_first; + out = ff_get_video_buffer(outlink, outlink->w, outlink->h); + if (!out) + return AVERROR(ENOMEM); + av_frame_copy_props(out, next); + out->interlaced_frame = 1; + out->top_field_first = !tff; + + if (next->pts != AV_NOPTS_VALUE && cur->pts != AV_NOPTS_VALUE) + out->pts = cur->pts + next->pts; + else + out->pts = AV_NOPTS_VALUE; + /* write current frame second field lines into the second field of the new frame */ + copy_picture_field(tinterlace, out->data, out->linesize, + (const uint8_t **)cur->data, cur->linesize, + inlink->format, inlink->w, inlink->h, + tff ? FIELD_LOWER : FIELD_UPPER, 1, tff ? FIELD_LOWER : FIELD_UPPER, + tinterlace->flags); + /* write next frame first field lines into the first field of the new frame */ + copy_picture_field(tinterlace, out->data, out->linesize, + (const uint8_t **)next->data, next->linesize, + inlink->format, inlink->w, inlink->h, + tff ? FIELD_UPPER : FIELD_LOWER, 1, tff ? FIELD_UPPER : FIELD_LOWER, + tinterlace->flags); + break; + default: + av_assert0(0); + } + + out->pts = av_rescale_q(out->pts, tinterlace->preout_time_base, outlink->time_base); + ret = ff_filter_frame(outlink, out); + tinterlace->frame++; + + return ret; +} + +static const AVFilterPad tinterlace_inputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_VIDEO, + .filter_frame = filter_frame, + }, + { NULL } +}; + +static const AVFilterPad tinterlace_outputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_VIDEO, + .config_props = config_out_props, + }, + { NULL } +}; + +AVFilter ff_vf_tinterlace = { + .name = "tinterlace", + .description = NULL_IF_CONFIG_SMALL("Perform temporal field interlacing."), + .priv_size = sizeof(TInterlaceContext), + .uninit = uninit, + .query_formats = query_formats, + .inputs = tinterlace_inputs, + .outputs = tinterlace_outputs, + .priv_class = &tinterlace_class, +}; |