/* * Common mpeg video decoding code * Copyright (c) 2000,2001 Fabrice Bellard * Copyright (c) 2002-2004 Michael Niedermayer * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser 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 */ #include #include "config_components.h" #include "libavutil/avassert.h" #include "libavutil/imgutils.h" #include "libavutil/internal.h" #include "libavutil/video_enc_params.h" #include "avcodec.h" #include "h264chroma.h" #include "internal.h" #include "mpegutils.h" #include "mpegvideo.h" #include "mpegvideodec.h" #include "mpeg4videodec.h" #include "threadframe.h" #include "wmv2dec.h" void ff_mpv_decode_init(MpegEncContext *s, AVCodecContext *avctx) { ff_mpv_common_defaults(s); s->avctx = avctx; s->width = avctx->coded_width; s->height = avctx->coded_height; s->codec_id = avctx->codec->id; s->workaround_bugs = avctx->workaround_bugs; /* convert fourcc to upper case */ s->codec_tag = ff_toupper4(avctx->codec_tag); ff_h264chroma_init(&s->h264chroma, 8); //for lowres } int ff_mpeg_update_thread_context(AVCodecContext *dst, const AVCodecContext *src) { MpegEncContext *const s1 = src->priv_data; MpegEncContext *const s = dst->priv_data; int ret; if (dst == src) return 0; av_assert0(s != s1); // FIXME can parameters change on I-frames? // in that case dst may need a reinit if (!s->context_initialized) { void *private_ctx = s->private_ctx; int err; memcpy(s, s1, sizeof(*s)); s->avctx = dst; s->private_ctx = private_ctx; s->bitstream_buffer = NULL; s->bitstream_buffer_size = s->allocated_bitstream_buffer_size = 0; if (s1->context_initialized) { ff_mpv_idct_init(s); if ((err = ff_mpv_common_init(s)) < 0) { memset(s, 0, sizeof(*s)); s->avctx = dst; s->private_ctx = private_ctx; memcpy(&s->h264chroma, &s1->h264chroma, sizeof(s->h264chroma)); return err; } } } if (s->height != s1->height || s->width != s1->width || s->context_reinit) { s->height = s1->height; s->width = s1->width; if ((ret = ff_mpv_common_frame_size_change(s)) < 0) return ret; } s->quarter_sample = s1->quarter_sample; s->coded_picture_number = s1->coded_picture_number; s->picture_number = s1->picture_number; av_assert0(!s->picture || s->picture != s1->picture); if (s->picture) for (int i = 0; i < MAX_PICTURE_COUNT; i++) { ff_mpeg_unref_picture(s->avctx, &s->picture[i]); if (s1->picture && s1->picture[i].f->buf[0] && (ret = ff_mpeg_ref_picture(s->avctx, &s->picture[i], &s1->picture[i])) < 0) return ret; } #define UPDATE_PICTURE(pic)\ do {\ ff_mpeg_unref_picture(s->avctx, &s->pic);\ if (s1->pic.f && s1->pic.f->buf[0])\ ret = ff_mpeg_ref_picture(s->avctx, &s->pic, &s1->pic);\ else\ ret = ff_update_picture_tables(&s->pic, &s1->pic);\ if (ret < 0)\ return ret;\ } while (0) UPDATE_PICTURE(current_picture); UPDATE_PICTURE(last_picture); UPDATE_PICTURE(next_picture); #define REBASE_PICTURE(pic, new_ctx, old_ctx) \ ((pic && pic >= old_ctx->picture && \ pic < old_ctx->picture + MAX_PICTURE_COUNT) ? \ &new_ctx->picture[pic - old_ctx->picture] : NULL) s->last_picture_ptr = REBASE_PICTURE(s1->last_picture_ptr, s, s1); s->current_picture_ptr = REBASE_PICTURE(s1->current_picture_ptr, s, s1); s->next_picture_ptr = REBASE_PICTURE(s1->next_picture_ptr, s, s1); // Error/bug resilience s->workaround_bugs = s1->workaround_bugs; s->padding_bug_score = s1->padding_bug_score; // MPEG-4 timing info memcpy(&s->last_time_base, &s1->last_time_base, (char *) &s1->pb_field_time + sizeof(s1->pb_field_time) - (char *) &s1->last_time_base); // B-frame info s->max_b_frames = s1->max_b_frames; s->low_delay = s1->low_delay; s->droppable = s1->droppable; // DivX handling (doesn't work) s->divx_packed = s1->divx_packed; if (s1->bitstream_buffer) { if (s1->bitstream_buffer_size + AV_INPUT_BUFFER_PADDING_SIZE > s->allocated_bitstream_buffer_size) { av_fast_malloc(&s->bitstream_buffer, &s->allocated_bitstream_buffer_size, s1->allocated_bitstream_buffer_size); if (!s->bitstream_buffer) { s->bitstream_buffer_size = 0; return AVERROR(ENOMEM); } } s->bitstream_buffer_size = s1->bitstream_buffer_size; memcpy(s->bitstream_buffer, s1->bitstream_buffer, s1->bitstream_buffer_size); memset(s->bitstream_buffer + s->bitstream_buffer_size, 0, AV_INPUT_BUFFER_PADDING_SIZE); } // linesize-dependent scratch buffer allocation if (!s->sc.edge_emu_buffer) if (s1->linesize) { if (ff_mpeg_framesize_alloc(s->avctx, &s->me, &s->sc, s1->linesize) < 0) { av_log(s->avctx, AV_LOG_ERROR, "Failed to allocate context " "scratch buffers.\n"); return AVERROR(ENOMEM); } } else { av_log(s->avctx, AV_LOG_ERROR, "Context scratch buffers could not " "be allocated due to unknown size.\n"); } // MPEG-2/interlacing info memcpy(&s->progressive_sequence, &s1->progressive_sequence, (char *) &s1->rtp_mode - (char *) &s1->progressive_sequence); return 0; } int ff_mpv_common_frame_size_change(MpegEncContext *s) { int err = 0; if (!s->context_initialized) return AVERROR(EINVAL); ff_mpv_free_context_frame(s); if (s->picture) for (int i = 0; i < MAX_PICTURE_COUNT; i++) s->picture[i].needs_realloc = 1; s->last_picture_ptr = s->next_picture_ptr = s->current_picture_ptr = NULL; if ((s->width || s->height) && (err = av_image_check_size(s->width, s->height, 0, s->avctx)) < 0) goto fail; /* set chroma shifts */ err = av_pix_fmt_get_chroma_sub_sample(s->avctx->pix_fmt, &s->chroma_x_shift, &s->chroma_y_shift); if (err < 0) goto fail; if ((err = ff_mpv_init_context_frame(s))) goto fail; memset(s->thread_context, 0, sizeof(s->thread_context)); s->thread_context[0] = s; if (s->width && s->height) { err = ff_mpv_init_duplicate_contexts(s); if (err < 0) goto fail; } s->context_reinit = 0; return 0; fail: ff_mpv_free_context_frame(s); s->context_reinit = 1; return err; } static int alloc_picture(MpegEncContext *s, Picture *pic) { return ff_alloc_picture(s->avctx, pic, &s->me, &s->sc, 0, 0, s->chroma_x_shift, s->chroma_y_shift, s->out_format, s->mb_stride, s->mb_width, s->mb_height, s->b8_stride, &s->linesize, &s->uvlinesize); } static void gray_frame(AVFrame *frame) { int h_chroma_shift, v_chroma_shift; av_pix_fmt_get_chroma_sub_sample(frame->format, &h_chroma_shift, &v_chroma_shift); for (int i = 0; i < frame->height; i++) memset(frame->data[0] + frame->linesize[0] * i, 0x80, frame->width); for (int i = 0; i < AV_CEIL_RSHIFT(frame->height, v_chroma_shift); i++) { memset(frame->data[1] + frame->linesize[1] * i, 0x80, AV_CEIL_RSHIFT(frame->width, h_chroma_shift)); memset(frame->data[2] + frame->linesize[2] * i, 0x80, AV_CEIL_RSHIFT(frame->width, h_chroma_shift)); } } /** * generic function called after decoding * the header and before a frame is decoded. */ int ff_mpv_frame_start(MpegEncContext *s, AVCodecContext *avctx) { Picture *pic; int idx, ret; s->mb_skipped = 0; if (!ff_thread_can_start_frame(avctx)) { av_log(avctx, AV_LOG_ERROR, "Attempt to start a frame outside SETUP state\n"); return -1; } /* mark & release old frames */ if (s->pict_type != AV_PICTURE_TYPE_B && s->last_picture_ptr && s->last_picture_ptr != s->next_picture_ptr && s->last_picture_ptr->f->buf[0]) { ff_mpeg_unref_picture(s->avctx, s->last_picture_ptr); } /* release non reference/forgotten frames */ for (int i = 0; i < MAX_PICTURE_COUNT; i++) { if (!s->picture[i].reference || (&s->picture[i] != s->last_picture_ptr && &s->picture[i] != s->next_picture_ptr && !s->picture[i].needs_realloc)) { ff_mpeg_unref_picture(s->avctx, &s->picture[i]); } } ff_mpeg_unref_picture(s->avctx, &s->current_picture); ff_mpeg_unref_picture(s->avctx, &s->last_picture); ff_mpeg_unref_picture(s->avctx, &s->next_picture); if (s->current_picture_ptr && !s->current_picture_ptr->f->buf[0]) { // we already have an unused image // (maybe it was set before reading the header) pic = s->current_picture_ptr; } else { idx = ff_find_unused_picture(s->avctx, s->picture, 0); if (idx < 0) { av_log(s->avctx, AV_LOG_ERROR, "no frame buffer available\n"); return idx; } pic = &s->picture[idx]; } pic->reference = 0; if (!s->droppable) { if (s->pict_type != AV_PICTURE_TYPE_B) pic->reference = 3; } #if FF_API_FRAME_PICTURE_NUMBER FF_DISABLE_DEPRECATION_WARNINGS pic->f->coded_picture_number = s->coded_picture_number++; FF_ENABLE_DEPRECATION_WARNINGS #endif if (alloc_picture(s, pic) < 0) return -1; s->current_picture_ptr = pic; // FIXME use only the vars from current_pic s->current_picture_ptr->f->flags |= AV_FRAME_FLAG_TOP_FIELD_FIRST * !!s->top_field_first; if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO || s->codec_id == AV_CODEC_ID_MPEG2VIDEO) { if (s->picture_structure != PICT_FRAME) s->current_picture_ptr->f->flags |= AV_FRAME_FLAG_TOP_FIELD_FIRST * ((s->picture_structure == PICT_TOP_FIELD) == s->first_field); } s->current_picture_ptr->f->flags |= AV_FRAME_FLAG_INTERLACED * (!s->progressive_frame && !s->progressive_sequence); s->current_picture_ptr->field_picture = s->picture_structure != PICT_FRAME; s->current_picture_ptr->f->pict_type = s->pict_type; if (s->pict_type == AV_PICTURE_TYPE_I) s->current_picture.f->flags |= AV_FRAME_FLAG_KEY; else s->current_picture.f->flags &= ~AV_FRAME_FLAG_KEY; if ((ret = ff_mpeg_ref_picture(s->avctx, &s->current_picture, s->current_picture_ptr)) < 0) return ret; if (s->pict_type != AV_PICTURE_TYPE_B) { s->last_picture_ptr = s->next_picture_ptr; if (!s->droppable) s->next_picture_ptr = s->current_picture_ptr; } ff_dlog(s->avctx, "L%p N%p C%p L%p N%p C%p type:%d drop:%d\n", s->last_picture_ptr, s->next_picture_ptr,s->current_picture_ptr, s->last_picture_ptr ? s->last_picture_ptr->f->data[0] : NULL, s->next_picture_ptr ? s->next_picture_ptr->f->data[0] : NULL, s->current_picture_ptr ? s->current_picture_ptr->f->data[0] : NULL, s->pict_type, s->droppable); if ((!s->last_picture_ptr || !s->last_picture_ptr->f->buf[0]) && (s->pict_type != AV_PICTURE_TYPE_I)) { int h_chroma_shift, v_chroma_shift; av_pix_fmt_get_chroma_sub_sample(s->avctx->pix_fmt, &h_chroma_shift, &v_chroma_shift); if (s->pict_type == AV_PICTURE_TYPE_B && s->next_picture_ptr && s->next_picture_ptr->f->buf[0]) av_log(avctx, AV_LOG_DEBUG, "allocating dummy last picture for B frame\n"); else if (s->pict_type != AV_PICTURE_TYPE_I) av_log(avctx, AV_LOG_ERROR, "warning: first frame is no keyframe\n"); /* Allocate a dummy frame */ idx = ff_find_unused_picture(s->avctx, s->picture, 0); if (idx < 0) { av_log(s->avctx, AV_LOG_ERROR, "no frame buffer available\n"); return idx; } s->last_picture_ptr = &s->picture[idx]; s->last_picture_ptr->reference = 3; s->last_picture_ptr->f->flags &= ~AV_FRAME_FLAG_KEY; s->last_picture_ptr->f->pict_type = AV_PICTURE_TYPE_P; if (alloc_picture(s, s->last_picture_ptr) < 0) { s->last_picture_ptr = NULL; return -1; } if (!avctx->hwaccel) { for (int i = 0; i < avctx->height; i++) memset(s->last_picture_ptr->f->data[0] + s->last_picture_ptr->f->linesize[0]*i, 0x80, avctx->width); if (s->last_picture_ptr->f->data[2]) { for (int i = 0; i < AV_CEIL_RSHIFT(avctx->height, v_chroma_shift); i++) { memset(s->last_picture_ptr->f->data[1] + s->last_picture_ptr->f->linesize[1]*i, 0x80, AV_CEIL_RSHIFT(avctx->width, h_chroma_shift)); memset(s->last_picture_ptr->f->data[2] + s->last_picture_ptr->f->linesize[2]*i, 0x80, AV_CEIL_RSHIFT(avctx->width, h_chroma_shift)); } } if (s->codec_id == AV_CODEC_ID_FLV1 || s->codec_id == AV_CODEC_ID_H263) { for (int i = 0; i < avctx->height; i++) memset(s->last_picture_ptr->f->data[0] + s->last_picture_ptr->f->linesize[0] * i, 16, avctx->width); } } ff_thread_report_progress(&s->last_picture_ptr->tf, INT_MAX, 0); ff_thread_report_progress(&s->last_picture_ptr->tf, INT_MAX, 1); } if ((!s->next_picture_ptr || !s->next_picture_ptr->f->buf[0]) && s->pict_type == AV_PICTURE_TYPE_B) { /* Allocate a dummy frame */ idx = ff_find_unused_picture(s->avctx, s->picture, 0); if (idx < 0) { av_log(s->avctx, AV_LOG_ERROR, "no frame buffer available\n"); return idx; } s->next_picture_ptr = &s->picture[idx]; s->next_picture_ptr->reference = 3; s->next_picture_ptr->f->flags &= ~AV_FRAME_FLAG_KEY; s->next_picture_ptr->f->pict_type = AV_PICTURE_TYPE_P; if (alloc_picture(s, s->next_picture_ptr) < 0) { s->next_picture_ptr = NULL; return -1; } ff_thread_report_progress(&s->next_picture_ptr->tf, INT_MAX, 0); ff_thread_report_progress(&s->next_picture_ptr->tf, INT_MAX, 1); } #if 0 // BUFREF-FIXME memset(s->last_picture.f->data, 0, sizeof(s->last_picture.f->data)); memset(s->next_picture.f->data, 0, sizeof(s->next_picture.f->data)); #endif if (s->last_picture_ptr) { if (s->last_picture_ptr->f->buf[0] && (ret = ff_mpeg_ref_picture(s->avctx, &s->last_picture, s->last_picture_ptr)) < 0) return ret; } if (s->next_picture_ptr) { if (s->next_picture_ptr->f->buf[0] && (ret = ff_mpeg_ref_picture(s->avctx, &s->next_picture, s->next_picture_ptr)) < 0) return ret; } av_assert0(s->pict_type == AV_PICTURE_TYPE_I || (s->last_picture_ptr && s->last_picture_ptr->f->buf[0])); if (s->picture_structure != PICT_FRAME) { for (int i = 0; i < 4; i++) { if (s->picture_structure == PICT_BOTTOM_FIELD) { s->current_picture.f->data[i] = FF_PTR_ADD(s->current_picture.f->data[i], s->current_picture.f->linesize[i]); } s->current_picture.f->linesize[i] *= 2; s->last_picture.f->linesize[i] *= 2; s->next_picture.f->linesize[i] *= 2; } } /* set dequantizer, we can't do it during init as * it might change for MPEG-4 and we can't do it in the header * decode as init is not called for MPEG-4 there yet */ if (s->mpeg_quant || s->codec_id == AV_CODEC_ID_MPEG2VIDEO) { s->dct_unquantize_intra = s->dct_unquantize_mpeg2_intra; s->dct_unquantize_inter = s->dct_unquantize_mpeg2_inter; } else if (s->out_format == FMT_H263 || s->out_format == FMT_H261) { s->dct_unquantize_intra = s->dct_unquantize_h263_intra; s->dct_unquantize_inter = s->dct_unquantize_h263_inter; } else { s->dct_unquantize_intra = s->dct_unquantize_mpeg1_intra; s->dct_unquantize_inter = s->dct_unquantize_mpeg1_inter; } if (s->avctx->debug & FF_DEBUG_NOMC) gray_frame(s->current_picture_ptr->f); return 0; } /* called after a frame has been decoded. */ void ff_mpv_frame_end(MpegEncContext *s) { emms_c(); if (s->current_picture.reference) ff_thread_report_progress(&s->current_picture_ptr->tf, INT_MAX, 0); } void ff_print_debug_info(const MpegEncContext *s, const Picture *p, AVFrame *pict) { ff_print_debug_info2(s->avctx, pict, s->mbskip_table, p->mb_type, p->qscale_table, p->motion_val, s->mb_width, s->mb_height, s->mb_stride, s->quarter_sample); } int ff_mpv_export_qp_table(const MpegEncContext *s, AVFrame *f, const Picture *p, int qp_type) { AVVideoEncParams *par; int mult = (qp_type == FF_MPV_QSCALE_TYPE_MPEG1) ? 2 : 1; unsigned int nb_mb = p->alloc_mb_height * p->alloc_mb_width; if (!(s->avctx->export_side_data & AV_CODEC_EXPORT_DATA_VIDEO_ENC_PARAMS)) return 0; par = av_video_enc_params_create_side_data(f, AV_VIDEO_ENC_PARAMS_MPEG2, nb_mb); if (!par) return AVERROR(ENOMEM); for (unsigned y = 0; y < p->alloc_mb_height; y++) for (unsigned x = 0; x < p->alloc_mb_width; x++) { const unsigned int block_idx = y * p->alloc_mb_width + x; const unsigned int mb_xy = y * p->alloc_mb_stride + x; AVVideoBlockParams *const b = av_video_enc_params_block(par, block_idx); b->src_x = x * 16; b->src_y = y * 16; b->w = 16; b->h = 16; b->delta_qp = p->qscale_table[mb_xy] * mult; } return 0; } void ff_mpeg_draw_horiz_band(MpegEncContext *s, int y, int h) { ff_draw_horiz_band(s->avctx, s->current_picture_ptr->f, s->last_picture_ptr ? s->last_picture_ptr->f : NULL, y, h, s->picture_structure, s->first_field, s->low_delay); } void ff_mpeg_flush(AVCodecContext *avctx) { MpegEncContext *const s = avctx->priv_data; if (!s->picture) return; for (int i = 0; i < MAX_PICTURE_COUNT; i++) ff_mpeg_unref_picture(s->avctx, &s->picture[i]); s->current_picture_ptr = s->last_picture_ptr = s->next_picture_ptr = NULL; ff_mpeg_unref_picture(s->avctx, &s->current_picture); ff_mpeg_unref_picture(s->avctx, &s->last_picture); ff_mpeg_unref_picture(s->avctx, &s->next_picture); s->mb_x = s->mb_y = 0; s->bitstream_buffer_size = 0; s->pp_time = 0; } void ff_mpv_report_decode_progress(MpegEncContext *s) { if (s->pict_type != AV_PICTURE_TYPE_B && !s->partitioned_frame && !s->er.error_occurred) ff_thread_report_progress(&s->current_picture_ptr->tf, s->mb_y, 0); } static inline int hpel_motion_lowres(MpegEncContext *s, uint8_t *dest, const uint8_t *src, int field_based, int field_select, int src_x, int src_y, int width, int height, ptrdiff_t stride, int h_edge_pos, int v_edge_pos, int w, int h, const h264_chroma_mc_func *pix_op, int motion_x, int motion_y) { const int lowres = s->avctx->lowres; const int op_index = FFMIN(lowres, 3); const int s_mask = (2 << lowres) - 1; int emu = 0; int sx, sy; if (s->quarter_sample) { motion_x /= 2; motion_y /= 2; } sx = motion_x & s_mask; sy = motion_y & s_mask; src_x += motion_x >> lowres + 1; src_y += motion_y >> lowres + 1; src += src_y * stride + src_x; if ((unsigned)src_x > FFMAX( h_edge_pos - (!!sx) - w, 0) || (unsigned)src_y > FFMAX((v_edge_pos >> field_based) - (!!sy) - h, 0)) { s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, src, s->linesize, s->linesize, w + 1, (h + 1) << field_based, src_x, src_y * (1 << field_based), h_edge_pos, v_edge_pos); src = s->sc.edge_emu_buffer; emu = 1; } sx = (sx << 2) >> lowres; sy = (sy << 2) >> lowres; if (field_select) src += s->linesize; pix_op[op_index](dest, src, stride, h, sx, sy); return emu; } /* apply one mpeg motion vector to the three components */ static av_always_inline void mpeg_motion_lowres(MpegEncContext *s, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr, int field_based, int bottom_field, int field_select, uint8_t *const *ref_picture, const h264_chroma_mc_func *pix_op, int motion_x, int motion_y, int h, int mb_y) { const uint8_t *ptr_y, *ptr_cb, *ptr_cr; int mx, my, src_x, src_y, uvsrc_x, uvsrc_y, sx, sy, uvsx, uvsy; ptrdiff_t uvlinesize, linesize; const int lowres = s->avctx->lowres; const int op_index = FFMIN(lowres - 1 + s->chroma_x_shift, 3); const int block_s = 8 >> lowres; const int s_mask = (2 << lowres) - 1; const int h_edge_pos = s->h_edge_pos >> lowres; const int v_edge_pos = s->v_edge_pos >> lowres; linesize = s->current_picture.f->linesize[0] << field_based; uvlinesize = s->current_picture.f->linesize[1] << field_based; // FIXME obviously not perfect but qpel will not work in lowres anyway if (s->quarter_sample) { motion_x /= 2; motion_y /= 2; } if (field_based) { motion_y += (bottom_field - field_select)*((1 << lowres)-1); } sx = motion_x & s_mask; sy = motion_y & s_mask; src_x = s->mb_x * 2 * block_s + (motion_x >> lowres + 1); src_y = (mb_y * 2 * block_s >> field_based) + (motion_y >> lowres + 1); if (s->out_format == FMT_H263) { uvsx = ((motion_x >> 1) & s_mask) | (sx & 1); uvsy = ((motion_y >> 1) & s_mask) | (sy & 1); uvsrc_x = src_x >> 1; uvsrc_y = src_y >> 1; } else if (s->out_format == FMT_H261) { // even chroma mv's are full pel in H261 mx = motion_x / 4; my = motion_y / 4; uvsx = (2 * mx) & s_mask; uvsy = (2 * my) & s_mask; uvsrc_x = s->mb_x * block_s + (mx >> lowres); uvsrc_y = mb_y * block_s + (my >> lowres); } else { if (s->chroma_y_shift) { mx = motion_x / 2; my = motion_y / 2; uvsx = mx & s_mask; uvsy = my & s_mask; uvsrc_x = s->mb_x * block_s + (mx >> lowres + 1); uvsrc_y = (mb_y * block_s >> field_based) + (my >> lowres + 1); } else { if (s->chroma_x_shift) { //Chroma422 mx = motion_x / 2; uvsx = mx & s_mask; uvsy = motion_y & s_mask; uvsrc_y = src_y; uvsrc_x = s->mb_x*block_s + (mx >> (lowres+1)); } else { //Chroma444 uvsx = motion_x & s_mask; uvsy = motion_y & s_mask; uvsrc_x = src_x; uvsrc_y = src_y; } } } ptr_y = ref_picture[0] + src_y * linesize + src_x; ptr_cb = ref_picture[1] + uvsrc_y * uvlinesize + uvsrc_x; ptr_cr = ref_picture[2] + uvsrc_y * uvlinesize + uvsrc_x; if ((unsigned) src_x > FFMAX( h_edge_pos - (!!sx) - 2 * block_s, 0) || uvsrc_y<0 || (unsigned) src_y > FFMAX((v_edge_pos >> field_based) - (!!sy) - h, 0)) { s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, ptr_y, linesize >> field_based, linesize >> field_based, 17, 17 + field_based, src_x, src_y * (1 << field_based), h_edge_pos, v_edge_pos); ptr_y = s->sc.edge_emu_buffer; if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY)) { uint8_t *ubuf = s->sc.edge_emu_buffer + 18 * s->linesize; uint8_t *vbuf =ubuf + 10 * s->uvlinesize; if (s->workaround_bugs & FF_BUG_IEDGE) vbuf -= s->uvlinesize; s->vdsp.emulated_edge_mc(ubuf, ptr_cb, uvlinesize >> field_based, uvlinesize >> field_based, 9, 9 + field_based, uvsrc_x, uvsrc_y * (1 << field_based), h_edge_pos >> 1, v_edge_pos >> 1); s->vdsp.emulated_edge_mc(vbuf, ptr_cr, uvlinesize >> field_based,uvlinesize >> field_based, 9, 9 + field_based, uvsrc_x, uvsrc_y * (1 << field_based), h_edge_pos >> 1, v_edge_pos >> 1); ptr_cb = ubuf; ptr_cr = vbuf; } } // FIXME use this for field pix too instead of the obnoxious hack which changes picture.f->data if (bottom_field) { dest_y += s->linesize; dest_cb += s->uvlinesize; dest_cr += s->uvlinesize; } if (field_select) { ptr_y += s->linesize; ptr_cb += s->uvlinesize; ptr_cr += s->uvlinesize; } sx = (sx << 2) >> lowres; sy = (sy << 2) >> lowres; pix_op[lowres - 1](dest_y, ptr_y, linesize, h, sx, sy); if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY)) { int hc = s->chroma_y_shift ? (h+1-bottom_field)>>1 : h; uvsx = (uvsx << 2) >> lowres; uvsy = (uvsy << 2) >> lowres; if (hc) { pix_op[op_index](dest_cb, ptr_cb, uvlinesize, hc, uvsx, uvsy); pix_op[op_index](dest_cr, ptr_cr, uvlinesize, hc, uvsx, uvsy); } } // FIXME h261 lowres loop filter } static inline void chroma_4mv_motion_lowres(MpegEncContext *s, uint8_t *dest_cb, uint8_t *dest_cr, uint8_t *const *ref_picture, const h264_chroma_mc_func * pix_op, int mx, int my) { const int lowres = s->avctx->lowres; const int op_index = FFMIN(lowres, 3); const int block_s = 8 >> lowres; const int s_mask = (2 << lowres) - 1; const int h_edge_pos = s->h_edge_pos >> lowres + 1; const int v_edge_pos = s->v_edge_pos >> lowres + 1; int emu = 0, src_x, src_y, sx, sy; ptrdiff_t offset; const uint8_t *ptr; if (s->quarter_sample) { mx /= 2; my /= 2; } /* In case of 8X8, we construct a single chroma motion vector with a special rounding */ mx = ff_h263_round_chroma(mx); my = ff_h263_round_chroma(my); sx = mx & s_mask; sy = my & s_mask; src_x = s->mb_x * block_s + (mx >> lowres + 1); src_y = s->mb_y * block_s + (my >> lowres + 1); offset = src_y * s->uvlinesize + src_x; ptr = ref_picture[1] + offset; if ((unsigned) src_x > FFMAX(h_edge_pos - (!!sx) - block_s, 0) || (unsigned) src_y > FFMAX(v_edge_pos - (!!sy) - block_s, 0)) { s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, ptr, s->uvlinesize, s->uvlinesize, 9, 9, src_x, src_y, h_edge_pos, v_edge_pos); ptr = s->sc.edge_emu_buffer; emu = 1; } sx = (sx << 2) >> lowres; sy = (sy << 2) >> lowres; pix_op[op_index](dest_cb, ptr, s->uvlinesize, block_s, sx, sy); ptr = ref_picture[2] + offset; if (emu) { s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, ptr, s->uvlinesize, s->uvlinesize, 9, 9, src_x, src_y, h_edge_pos, v_edge_pos); ptr = s->sc.edge_emu_buffer; } pix_op[op_index](dest_cr, ptr, s->uvlinesize, block_s, sx, sy); } /** * motion compensation of a single macroblock * @param s context * @param dest_y luma destination pointer * @param dest_cb chroma cb/u destination pointer * @param dest_cr chroma cr/v destination pointer * @param dir direction (0->forward, 1->backward) * @param ref_picture array[3] of pointers to the 3 planes of the reference picture * @param pix_op halfpel motion compensation function (average or put normally) * the motion vectors are taken from s->mv and the MV type from s->mv_type */ static inline void MPV_motion_lowres(MpegEncContext *s, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr, int dir, uint8_t *const *ref_picture, const h264_chroma_mc_func *pix_op) { int mx, my; int mb_x, mb_y; const int lowres = s->avctx->lowres; const int block_s = 8 >>lowres; mb_x = s->mb_x; mb_y = s->mb_y; switch (s->mv_type) { case MV_TYPE_16X16: mpeg_motion_lowres(s, dest_y, dest_cb, dest_cr, 0, 0, 0, ref_picture, pix_op, s->mv[dir][0][0], s->mv[dir][0][1], 2 * block_s, mb_y); break; case MV_TYPE_8X8: mx = 0; my = 0; for (int i = 0; i < 4; i++) { hpel_motion_lowres(s, dest_y + ((i & 1) + (i >> 1) * s->linesize) * block_s, ref_picture[0], 0, 0, (2 * mb_x + (i & 1)) * block_s, (2 * mb_y + (i >> 1)) * block_s, s->width, s->height, s->linesize, s->h_edge_pos >> lowres, s->v_edge_pos >> lowres, block_s, block_s, pix_op, s->mv[dir][i][0], s->mv[dir][i][1]); mx += s->mv[dir][i][0]; my += s->mv[dir][i][1]; } if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY)) chroma_4mv_motion_lowres(s, dest_cb, dest_cr, ref_picture, pix_op, mx, my); break; case MV_TYPE_FIELD: if (s->picture_structure == PICT_FRAME) { /* top field */ mpeg_motion_lowres(s, dest_y, dest_cb, dest_cr, 1, 0, s->field_select[dir][0], ref_picture, pix_op, s->mv[dir][0][0], s->mv[dir][0][1], block_s, mb_y); /* bottom field */ mpeg_motion_lowres(s, dest_y, dest_cb, dest_cr, 1, 1, s->field_select[dir][1], ref_picture, pix_op, s->mv[dir][1][0], s->mv[dir][1][1], block_s, mb_y); } else { if (s->picture_structure != s->field_select[dir][0] + 1 && s->pict_type != AV_PICTURE_TYPE_B && !s->first_field) { ref_picture = s->current_picture_ptr->f->data; } mpeg_motion_lowres(s, dest_y, dest_cb, dest_cr, 0, 0, s->field_select[dir][0], ref_picture, pix_op, s->mv[dir][0][0], s->mv[dir][0][1], 2 * block_s, mb_y >> 1); } break; case MV_TYPE_16X8: for (int i = 0; i < 2; i++) { uint8_t *const *ref2picture; if (s->picture_structure == s->field_select[dir][i] + 1 || s->pict_type == AV_PICTURE_TYPE_B || s->first_field) { ref2picture = ref_picture; } else { ref2picture = s->current_picture_ptr->f->data; } mpeg_motion_lowres(s, dest_y, dest_cb, dest_cr, 0, 0, s->field_select[dir][i], ref2picture, pix_op, s->mv[dir][i][0], s->mv[dir][i][1] + 2 * block_s * i, block_s, mb_y >> 1); dest_y += 2 * block_s * s->linesize; dest_cb += (2 * block_s >> s->chroma_y_shift) * s->uvlinesize; dest_cr += (2 * block_s >> s->chroma_y_shift) * s->uvlinesize; } break; case MV_TYPE_DMV: if (s->picture_structure == PICT_FRAME) { for (int i = 0; i < 2; i++) { for (int j = 0; j < 2; j++) { mpeg_motion_lowres(s, dest_y, dest_cb, dest_cr, 1, j, j ^ i, ref_picture, pix_op, s->mv[dir][2 * i + j][0], s->mv[dir][2 * i + j][1], block_s, mb_y); } pix_op = s->h264chroma.avg_h264_chroma_pixels_tab; } } else { for (int i = 0; i < 2; i++) { mpeg_motion_lowres(s, dest_y, dest_cb, dest_cr, 0, 0, s->picture_structure != i + 1, ref_picture, pix_op, s->mv[dir][2 * i][0],s->mv[dir][2 * i][1], 2 * block_s, mb_y >> 1); // after put we make avg of the same block pix_op = s->h264chroma.avg_h264_chroma_pixels_tab; // opposite parity is always in the same // frame if this is second field if (!s->first_field) { ref_picture = s->current_picture_ptr->f->data; } } } break; default: av_assert2(0); } } /** * find the lowest MB row referenced in the MVs */ static int lowest_referenced_row(MpegEncContext *s, int dir) { int my_max = INT_MIN, my_min = INT_MAX, qpel_shift = !s->quarter_sample; int off, mvs; if (s->picture_structure != PICT_FRAME || s->mcsel) goto unhandled; switch (s->mv_type) { case MV_TYPE_16X16: mvs = 1; break; case MV_TYPE_16X8: mvs = 2; break; case MV_TYPE_8X8: mvs = 4; break; default: goto unhandled; } for (int i = 0; i < mvs; i++) { int my = s->mv[dir][i][1]; my_max = FFMAX(my_max, my); my_min = FFMIN(my_min, my); } off = ((FFMAX(-my_min, my_max) << qpel_shift) + 63) >> 6; return av_clip(s->mb_y + off, 0, s->mb_height - 1); unhandled: return s->mb_height - 1; } /* add block[] to dest[] */ static inline void add_dct(MpegEncContext *s, int16_t *block, int i, uint8_t *dest, int line_size) { if (s->block_last_index[i] >= 0) { s->idsp.idct_add(dest, line_size, block); } } #define IS_ENCODER 0 #include "mpv_reconstruct_mb_template.c" void ff_mpv_reconstruct_mb(MpegEncContext *s, int16_t block[12][64]) { if (s->avctx->debug & FF_DEBUG_DCT_COEFF) { /* print DCT coefficients */ av_log(s->avctx, AV_LOG_DEBUG, "DCT coeffs of MB at %dx%d:\n", s->mb_x, s->mb_y); for (int i = 0; i < 6; i++) { for (int j = 0; j < 64; j++) { av_log(s->avctx, AV_LOG_DEBUG, "%5d", block[i][s->idsp.idct_permutation[j]]); } av_log(s->avctx, AV_LOG_DEBUG, "\n"); } } if (!s->avctx->lowres) { #if !CONFIG_SMALL if (s->out_format == FMT_MPEG1) mpv_reconstruct_mb_internal(s, block, 0, DEFINITELY_MPEG12); else mpv_reconstruct_mb_internal(s, block, 0, NOT_MPEG12); #else mpv_reconstruct_mb_internal(s, block, 0, MAY_BE_MPEG12); #endif } else mpv_reconstruct_mb_internal(s, block, 1, MAY_BE_MPEG12); }