ref: c6e66595a8f553f348f19b60b8326aac536f00ad
dir: /src/obu.c/
/* * Copyright © 2018, VideoLAN and dav1d authors * Copyright © 2018, Two Orioles, LLC * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, this * list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include "config.h" #include <assert.h> #include <errno.h> #include <limits.h> #include <stdio.h> #include "dav1d/data.h" #include "common/intops.h" #include "src/decode.h" #include "src/getbits.h" #include "src/levels.h" #include "src/obu.h" #include "src/ref.h" #include "src/warpmv.h" static int parse_seq_hdr(Dav1dContext *const c, GetBits *const gb) { const uint8_t *const init_ptr = gb->ptr; Av1SequenceHeader *const hdr = &c->seq_hdr; #define DEBUG_SEQ_HDR 0 hdr->profile = dav1d_get_bits(gb, 3); if (hdr->profile > 2) goto error; #if DEBUG_SEQ_HDR printf("SEQHDR: post-profile: off=%ld\n", (gb->ptr - init_ptr) * 8 - gb->bits_left); #endif hdr->still_picture = dav1d_get_bits(gb, 1); hdr->reduced_still_picture_header = dav1d_get_bits(gb, 1); if (hdr->reduced_still_picture_header && !hdr->still_picture) goto error; #if DEBUG_SEQ_HDR printf("SEQHDR: post-stillpicture_flags: off=%ld\n", (gb->ptr - init_ptr) * 8 - gb->bits_left); #endif if (hdr->reduced_still_picture_header) { hdr->timing_info_present = 0; hdr->decoder_model_info_present = 0; hdr->display_model_info_present = 0; hdr->num_operating_points = 1; hdr->operating_points[0].idc = 0; hdr->operating_points[0].major_level = dav1d_get_bits(gb, 3); hdr->operating_points[0].minor_level = dav1d_get_bits(gb, 2); hdr->operating_points[0].tier = 0; hdr->operating_points[0].decoder_model_param_present = 0; hdr->operating_points[0].display_model_param_present = 0; } else { hdr->timing_info_present = dav1d_get_bits(gb, 1); if (hdr->timing_info_present) { hdr->num_units_in_tick = dav1d_get_bits(gb, 32); hdr->time_scale = dav1d_get_bits(gb, 32); hdr->equal_picture_interval = dav1d_get_bits(gb, 1); if (hdr->equal_picture_interval) hdr->num_ticks_per_picture = dav1d_get_vlc(gb) + 1; hdr->decoder_model_info_present = dav1d_get_bits(gb, 1); if (hdr->decoder_model_info_present) { hdr->encoder_decoder_buffer_delay_length = dav1d_get_bits(gb, 5) + 1; hdr->num_units_in_decoding_tick = dav1d_get_bits(gb, 32); hdr->buffer_removal_delay_length = dav1d_get_bits(gb, 5) + 1; hdr->frame_presentation_delay_length = dav1d_get_bits(gb, 5) + 1; } } else { hdr->decoder_model_info_present = 0; } #if DEBUG_SEQ_HDR printf("SEQHDR: post-timinginfo: off=%ld\n", (gb->ptr - init_ptr) * 8 - gb->bits_left); #endif hdr->display_model_info_present = dav1d_get_bits(gb, 1); hdr->num_operating_points = dav1d_get_bits(gb, 5) + 1; for (int i = 0; i < c->seq_hdr.num_operating_points; i++) { struct Av1SequenceHeaderOperatingPoint *const op = &hdr->operating_points[i]; op->idc = dav1d_get_bits(gb, 12); op->major_level = 2 + dav1d_get_bits(gb, 3); op->minor_level = dav1d_get_bits(gb, 2); op->tier = op->major_level > 3 ? dav1d_get_bits(gb, 1) : 0; op->decoder_model_param_present = hdr->decoder_model_info_present && dav1d_get_bits(gb, 1); if (op->decoder_model_param_present) { op->decoder_buffer_delay = dav1d_get_bits(gb, hdr->encoder_decoder_buffer_delay_length); op->encoder_buffer_delay = dav1d_get_bits(gb, hdr->encoder_decoder_buffer_delay_length); op->low_delay_mode = dav1d_get_bits(gb, 1); } op->display_model_param_present = hdr->display_model_info_present && dav1d_get_bits(gb, 1); if (op->display_model_param_present) { op->initial_display_delay = dav1d_get_bits(gb, 4) + 1; } } #if DEBUG_SEQ_HDR printf("SEQHDR: post-operating-points: off=%ld\n", (gb->ptr - init_ptr) * 8 - gb->bits_left); #endif } hdr->width_n_bits = dav1d_get_bits(gb, 4) + 1; hdr->height_n_bits = dav1d_get_bits(gb, 4) + 1; hdr->max_width = dav1d_get_bits(gb, hdr->width_n_bits) + 1; hdr->max_height = dav1d_get_bits(gb, hdr->height_n_bits) + 1; #if DEBUG_SEQ_HDR printf("SEQHDR: post-size: off=%ld\n", (gb->ptr - init_ptr) * 8 - gb->bits_left); #endif hdr->frame_id_numbers_present = hdr->reduced_still_picture_header ? 0 : dav1d_get_bits(gb, 1); if (hdr->frame_id_numbers_present) { hdr->delta_frame_id_n_bits = dav1d_get_bits(gb, 4) + 2; hdr->frame_id_n_bits = dav1d_get_bits(gb, 3) + hdr->delta_frame_id_n_bits + 1; } #if DEBUG_SEQ_HDR printf("SEQHDR: post-frame-id-numbers-present: off=%ld\n", (gb->ptr - init_ptr) * 8 - gb->bits_left); #endif hdr->sb128 = dav1d_get_bits(gb, 1); hdr->filter_intra = dav1d_get_bits(gb, 1); hdr->intra_edge_filter = dav1d_get_bits(gb, 1); if (hdr->reduced_still_picture_header) { hdr->inter_intra = 0; hdr->masked_compound = 0; hdr->warped_motion = 0; hdr->dual_filter = 0; hdr->order_hint = 0; hdr->jnt_comp = 0; hdr->ref_frame_mvs = 0; hdr->order_hint_n_bits = 0; hdr->screen_content_tools = ADAPTIVE; hdr->force_integer_mv = ADAPTIVE; } else { hdr->inter_intra = dav1d_get_bits(gb, 1); hdr->masked_compound = dav1d_get_bits(gb, 1); hdr->warped_motion = dav1d_get_bits(gb, 1); hdr->dual_filter = dav1d_get_bits(gb, 1); hdr->order_hint = dav1d_get_bits(gb, 1); if (hdr->order_hint) { hdr->jnt_comp = dav1d_get_bits(gb, 1); hdr->ref_frame_mvs = dav1d_get_bits(gb, 1); } else { hdr->jnt_comp = 0; hdr->ref_frame_mvs = 0; hdr->order_hint_n_bits = 0; } hdr->screen_content_tools = dav1d_get_bits(gb, 1) ? ADAPTIVE : dav1d_get_bits(gb, 1); #if DEBUG_SEQ_HDR printf("SEQHDR: post-screentools: off=%ld\n", (gb->ptr - init_ptr) * 8 - gb->bits_left); #endif hdr->force_integer_mv = hdr->screen_content_tools ? dav1d_get_bits(gb, 1) ? ADAPTIVE : dav1d_get_bits(gb, 1) : 2; if (hdr->order_hint) hdr->order_hint_n_bits = dav1d_get_bits(gb, 3) + 1; } hdr->super_res = dav1d_get_bits(gb, 1); hdr->cdef = dav1d_get_bits(gb, 1); hdr->restoration = dav1d_get_bits(gb, 1); #if DEBUG_SEQ_HDR printf("SEQHDR: post-featurebits: off=%ld\n", (gb->ptr - init_ptr) * 8 - gb->bits_left); #endif const int hbd = dav1d_get_bits(gb, 1); hdr->bpc = hdr->profile == 2 && hbd ? 10U + 2 * dav1d_get_bits(gb, 1) : 8U + 2 * hbd; hdr->hbd = hdr->bpc > 8; const int monochrome = hdr->profile != 1 ? dav1d_get_bits(gb, 1) : 0; hdr->color_description_present = dav1d_get_bits(gb, 1); if (hdr->color_description_present) { hdr->pri = dav1d_get_bits(gb, 8); hdr->trc = dav1d_get_bits(gb, 8); hdr->mtrx = dav1d_get_bits(gb, 8); } else { hdr->pri = DAV1D_COLOR_PRI_UNKNOWN; hdr->trc = DAV1D_TRC_UNKNOWN; hdr->mtrx = DAV1D_MC_UNKNOWN; } if (monochrome) { hdr->color_range = dav1d_get_bits(gb, 1); hdr->layout = DAV1D_PIXEL_LAYOUT_I400; hdr->chr = DAV1D_CHR_UNKNOWN; hdr->separate_uv_delta_q = 0; } else if (hdr->pri == DAV1D_COLOR_PRI_BT709 && hdr->trc == DAV1D_TRC_SRGB && hdr->mtrx == DAV1D_MC_IDENTITY) { hdr->layout = DAV1D_PIXEL_LAYOUT_I444; hdr->color_range = 1; if (hdr->profile != 1 && !(hdr->profile == 2 && hdr->bpc == 12)) goto error; } else { hdr->color_range = dav1d_get_bits(gb, 1); switch (hdr->profile) { case 0: hdr->layout = DAV1D_PIXEL_LAYOUT_I420; break; case 1: hdr->layout = DAV1D_PIXEL_LAYOUT_I444; break; case 2: if (hdr->bpc == 12) { hdr->layout = dav1d_get_bits(gb, 1) ? dav1d_get_bits(gb, 1) ? DAV1D_PIXEL_LAYOUT_I420 : DAV1D_PIXEL_LAYOUT_I422 : DAV1D_PIXEL_LAYOUT_I444; } else hdr->layout = DAV1D_PIXEL_LAYOUT_I422; break; } if (hdr->layout == DAV1D_PIXEL_LAYOUT_I420) hdr->chr = dav1d_get_bits(gb, 2); hdr->separate_uv_delta_q = dav1d_get_bits(gb, 1); } #if DEBUG_SEQ_HDR printf("SEQHDR: post-colorinfo: off=%ld\n", (gb->ptr - init_ptr) * 8 - gb->bits_left); #endif c->seq_hdr.film_grain_present = dav1d_get_bits(gb, 1); #if DEBUG_SEQ_HDR printf("SEQHDR: post-filmgrain: off=%ld\n", (gb->ptr - init_ptr) * 8 - gb->bits_left); #endif dav1d_get_bits(gb, 1); // dummy bit return dav1d_flush_get_bits(gb) - init_ptr; error: fprintf(stderr, "Error parsing sequence header\n"); return -EINVAL; } static int read_frame_size(Dav1dContext *const c, GetBits *const gb, const int use_ref) { const Av1SequenceHeader *const seqhdr = &c->seq_hdr; Av1FrameHeader *const hdr = &c->frame_hdr; if (use_ref) { for (int i = 0; i < 7; i++) { if (dav1d_get_bits(gb, 1)) { Dav1dThreadPicture *const ref = &c->refs[c->frame_hdr.refidx[i]].p; if (!ref->p.data[0]) return -1; // FIXME render_* may be wrong hdr->render_width = hdr->width = ref->p.p.w; hdr->render_height = hdr->height = ref->p.p.h; hdr->super_res = 0; // FIXME probably wrong return 0; } } } if (hdr->frame_size_override) { hdr->width = dav1d_get_bits(gb, seqhdr->width_n_bits) + 1; hdr->height = dav1d_get_bits(gb, seqhdr->height_n_bits) + 1; } else { hdr->width = seqhdr->max_width; hdr->height = seqhdr->max_height; } hdr->super_res = seqhdr->super_res && dav1d_get_bits(gb, 1); if (hdr->super_res) return -1; // FIXME hdr->have_render_size = dav1d_get_bits(gb, 1); if (hdr->have_render_size) { hdr->render_width = dav1d_get_bits(gb, seqhdr->width_n_bits) + 1; hdr->render_height = dav1d_get_bits(gb, seqhdr->height_n_bits) + 1; } else { hdr->render_width = hdr->width; hdr->render_height = hdr->height; } return 0; } static inline int tile_log2(int sz, int tgt) { int k; for (k = 0; (sz << k) < tgt; k++) ; return k; } static const Av1LoopfilterModeRefDeltas default_mode_ref_deltas = { .mode_delta = { 0, 0 }, .ref_delta = { 1, 0, 0, 0, -1, 0, -1, -1 }, }; static int parse_frame_hdr(Dav1dContext *const c, GetBits *const gb, const int have_trailing_bit) { const uint8_t *const init_ptr = gb->ptr; const Av1SequenceHeader *const seqhdr = &c->seq_hdr; Av1FrameHeader *const hdr = &c->frame_hdr; int res; #define DEBUG_FRAME_HDR 0 hdr->show_existing_frame = !seqhdr->reduced_still_picture_header && dav1d_get_bits(gb, 1); #if DEBUG_FRAME_HDR printf("HDR: post-show_existing_frame: off=%ld\n", (gb->ptr - init_ptr) * 8 - gb->bits_left); #endif if (hdr->show_existing_frame) { hdr->existing_frame_idx = dav1d_get_bits(gb, 3); if (seqhdr->decoder_model_info_present && !seqhdr->equal_picture_interval) hdr->frame_presentation_delay = dav1d_get_bits(gb, seqhdr->frame_presentation_delay_length); if (seqhdr->frame_id_numbers_present) hdr->frame_id = dav1d_get_bits(gb, seqhdr->frame_id_n_bits); goto end; } hdr->frame_type = seqhdr->reduced_still_picture_header ? DAV1D_FRAME_TYPE_KEY : dav1d_get_bits(gb, 2); hdr->show_frame = seqhdr->reduced_still_picture_header || dav1d_get_bits(gb, 1); if (hdr->show_frame) { if (seqhdr->decoder_model_info_present && !seqhdr->equal_picture_interval) hdr->frame_presentation_delay = dav1d_get_bits(gb, seqhdr->frame_presentation_delay_length); } else hdr->showable_frame = dav1d_get_bits(gb, 1); hdr->error_resilient_mode = (hdr->frame_type == DAV1D_FRAME_TYPE_KEY && hdr->show_frame) || hdr->frame_type == DAV1D_FRAME_TYPE_SWITCH || seqhdr->reduced_still_picture_header || dav1d_get_bits(gb, 1); #if DEBUG_FRAME_HDR printf("HDR: post-frametype_bits: off=%ld\n", (gb->ptr - init_ptr) * 8 - gb->bits_left); #endif hdr->disable_cdf_update = dav1d_get_bits(gb, 1); hdr->allow_screen_content_tools = seqhdr->screen_content_tools == ADAPTIVE ? dav1d_get_bits(gb, 1) : seqhdr->screen_content_tools; if (hdr->allow_screen_content_tools) hdr->force_integer_mv = seqhdr->force_integer_mv == ADAPTIVE ? dav1d_get_bits(gb, 1) : seqhdr->force_integer_mv; else hdr->force_integer_mv = 0; if (!(hdr->frame_type & 1)) hdr->force_integer_mv = 1; if (seqhdr->frame_id_numbers_present) hdr->frame_id = dav1d_get_bits(gb, seqhdr->frame_id_n_bits); hdr->frame_size_override = seqhdr->reduced_still_picture_header ? 0 : hdr->frame_type == DAV1D_FRAME_TYPE_SWITCH ? 1 : dav1d_get_bits(gb, 1); #if DEBUG_FRAME_HDR printf("HDR: post-frame_size_override_flag: off=%ld\n", (gb->ptr - init_ptr) * 8 - gb->bits_left); #endif hdr->frame_offset = seqhdr->order_hint ? dav1d_get_bits(gb, seqhdr->order_hint_n_bits) : 0; hdr->primary_ref_frame = !hdr->error_resilient_mode && hdr->frame_type & 1 ? dav1d_get_bits(gb, 3) : PRIMARY_REF_NONE; if (seqhdr->decoder_model_info_present) { hdr->buffer_removal_time_present = dav1d_get_bits(gb, 1); if (hdr->buffer_removal_time_present) { for (int i = 0; i < c->seq_hdr.num_operating_points; i++) { const struct Av1SequenceHeaderOperatingPoint *const seqop = &seqhdr->operating_points[i]; struct Av1FrameHeaderOperatingPoint *const op = &hdr->operating_points[i]; if (seqop->decoder_model_param_present) { int in_temporal_layer = (seqop->idc >> 0 /* FIXME: temporal_id */ ) & 1; int in_spatial_layer = (seqop->idc >> (0 /* FIXME: spatial_id */ + 8)) & 1; if (!seqop->idc || in_temporal_layer || in_spatial_layer) op->buffer_removal_time = dav1d_get_bits(gb, seqhdr->buffer_removal_delay_length); } } } } if (hdr->frame_type == DAV1D_FRAME_TYPE_KEY || hdr->frame_type == DAV1D_FRAME_TYPE_INTRA) { hdr->refresh_frame_flags = (hdr->frame_type == DAV1D_FRAME_TYPE_KEY && hdr->show_frame) ? 0xff : dav1d_get_bits(gb, 8); if (hdr->refresh_frame_flags != 0xff && hdr->error_resilient_mode && seqhdr->order_hint) for (int i = 0; i < 8; i++) dav1d_get_bits(gb, seqhdr->order_hint_n_bits); if ((res = read_frame_size(c, gb, 0)) < 0) goto error; hdr->allow_intrabc = hdr->allow_screen_content_tools && /* FIXME: no superres scaling && */ dav1d_get_bits(gb, 1); hdr->use_ref_frame_mvs = 0; } else { hdr->allow_intrabc = 0; hdr->refresh_frame_flags = hdr->frame_type == DAV1D_FRAME_TYPE_SWITCH ? 0xff : dav1d_get_bits(gb, 8); if (hdr->error_resilient_mode && seqhdr->order_hint) for (int i = 0; i < 8; i++) dav1d_get_bits(gb, seqhdr->order_hint_n_bits); hdr->frame_ref_short_signaling = seqhdr->order_hint && dav1d_get_bits(gb, 1); if (hdr->frame_ref_short_signaling) goto error; // FIXME for (int i = 0; i < 7; i++) { hdr->refidx[i] = dav1d_get_bits(gb, 3); if (seqhdr->frame_id_numbers_present) dav1d_get_bits(gb, seqhdr->delta_frame_id_n_bits); } const int use_ref = !hdr->error_resilient_mode && hdr->frame_size_override; if ((res = read_frame_size(c, gb, use_ref)) < 0) goto error; hdr->hp = !hdr->force_integer_mv && dav1d_get_bits(gb, 1); hdr->subpel_filter_mode = dav1d_get_bits(gb, 1) ? FILTER_SWITCHABLE : dav1d_get_bits(gb, 2); hdr->switchable_motion_mode = dav1d_get_bits(gb, 1); hdr->use_ref_frame_mvs = !hdr->error_resilient_mode && seqhdr->ref_frame_mvs && seqhdr->order_hint && hdr->frame_type & 1 && dav1d_get_bits(gb, 1); } #if DEBUG_FRAME_HDR printf("HDR: post-frametype-specific-bits: off=%ld\n", (gb->ptr - init_ptr) * 8 - gb->bits_left); #endif hdr->refresh_context = !seqhdr->reduced_still_picture_header && !hdr->disable_cdf_update && !dav1d_get_bits(gb, 1); #if DEBUG_FRAME_HDR printf("HDR: post-refresh_context: off=%ld\n", (gb->ptr - init_ptr) * 8 - gb->bits_left); #endif // tile data hdr->tiling.uniform = dav1d_get_bits(gb, 1); const int sbsz_min1 = (64 << seqhdr->sb128) - 1; int sbsz_log2 = 6 + seqhdr->sb128; int sbw = (hdr->width + sbsz_min1) >> sbsz_log2; int sbh = (hdr->height + sbsz_min1) >> sbsz_log2; int max_tile_width_sb = 4096 >> sbsz_log2, max_tile_height_sb; int max_tile_area_sb = 4096 * 2304 >> (2 * sbsz_log2); hdr->tiling.min_log2_cols = tile_log2(max_tile_width_sb, sbw); hdr->tiling.max_log2_cols = tile_log2(1, imin(sbw, 1024)); hdr->tiling.max_log2_rows = tile_log2(1, imin(sbh, 1024)); int min_log2_tiles = imax(tile_log2(max_tile_area_sb, sbw * sbh), hdr->tiling.min_log2_cols); if (hdr->tiling.uniform) { for (hdr->tiling.log2_cols = hdr->tiling.min_log2_cols; hdr->tiling.log2_cols < hdr->tiling.max_log2_cols && dav1d_get_bits(gb, 1); hdr->tiling.log2_cols++) ; const int tile_w = 1 + ((sbw - 1) >> hdr->tiling.log2_cols); hdr->tiling.cols = 0; for (int sbx = 0; sbx < sbw; sbx += tile_w, hdr->tiling.cols++) hdr->tiling.col_start_sb[hdr->tiling.cols] = sbx; hdr->tiling.min_log2_rows = imax(min_log2_tiles - hdr->tiling.log2_cols, 0); max_tile_height_sb = sbh >> hdr->tiling.min_log2_rows; for (hdr->tiling.log2_rows = hdr->tiling.min_log2_rows; hdr->tiling.log2_rows < hdr->tiling.max_log2_rows && dav1d_get_bits(gb, 1); hdr->tiling.log2_rows++) ; const int tile_h = 1 + ((sbh - 1) >> hdr->tiling.log2_rows); hdr->tiling.rows = 0; for (int sby = 0; sby < sbh; sby += tile_h, hdr->tiling.rows++) hdr->tiling.row_start_sb[hdr->tiling.rows] = sby; } else { hdr->tiling.cols = 0; int widest_tile = 0, max_tile_area_sb = sbw * sbh; for (int sbx = 0; sbx < sbw; hdr->tiling.cols++) { const int tile_width_sb = imin(sbw - sbx, max_tile_width_sb); const int tile_w = (tile_width_sb > 1) ? 1 + dav1d_get_uniform(gb, tile_width_sb) : 1; hdr->tiling.col_start_sb[hdr->tiling.cols] = sbx; sbx += tile_w; widest_tile = imax(widest_tile, tile_w); } hdr->tiling.log2_cols = tile_log2(1, hdr->tiling.cols); if (min_log2_tiles) max_tile_area_sb >>= min_log2_tiles + 1; max_tile_height_sb = imax(max_tile_area_sb / widest_tile, 1); hdr->tiling.rows = 0; for (int sby = 0; sby < sbh; hdr->tiling.rows++) { const int tile_height_sb = imin(sbh - sby, max_tile_height_sb); const int tile_h = (tile_height_sb > 1) ? 1 + dav1d_get_uniform(gb, tile_height_sb) : 1; hdr->tiling.row_start_sb[hdr->tiling.rows] = sby; sby += tile_h; } hdr->tiling.log2_rows = tile_log2(1, hdr->tiling.rows); } hdr->tiling.col_start_sb[hdr->tiling.cols] = sbw; hdr->tiling.row_start_sb[hdr->tiling.rows] = sbh; if (hdr->tiling.log2_cols || hdr->tiling.log2_rows) { hdr->tiling.update = dav1d_get_bits(gb, hdr->tiling.log2_cols + hdr->tiling.log2_rows); if (hdr->tiling.update >= hdr->tiling.cols * hdr->tiling.rows) goto error; hdr->tiling.n_bytes = dav1d_get_bits(gb, 2) + 1; } else { hdr->tiling.n_bytes = hdr->tiling.update = 0; } #if DEBUG_FRAME_HDR printf("HDR: post-tiling: off=%ld\n", (gb->ptr - init_ptr) * 8 - gb->bits_left); #endif // quant data hdr->quant.yac = dav1d_get_bits(gb, 8); hdr->quant.ydc_delta = dav1d_get_bits(gb, 1) ? dav1d_get_sbits(gb, 6) : 0; if (seqhdr->layout != DAV1D_PIXEL_LAYOUT_I400) { hdr->quant.udc_delta = dav1d_get_bits(gb, 1) ? dav1d_get_sbits(gb, 6) : 0; hdr->quant.uac_delta = dav1d_get_bits(gb, 1) ? dav1d_get_sbits(gb, 6) : 0; if (seqhdr->separate_uv_delta_q) { hdr->quant.vdc_delta = dav1d_get_bits(gb, 1) ? dav1d_get_sbits(gb, 6) : 0; hdr->quant.vac_delta = dav1d_get_bits(gb, 1) ? dav1d_get_sbits(gb, 6) : 0; } else { hdr->quant.vdc_delta = hdr->quant.udc_delta; hdr->quant.vac_delta = hdr->quant.uac_delta; } } #if DEBUG_FRAME_HDR printf("HDR: post-quant: off=%ld\n", (gb->ptr - init_ptr) * 8 - gb->bits_left); #endif hdr->quant.qm = dav1d_get_bits(gb, 1); if (hdr->quant.qm) { hdr->quant.qm_y = dav1d_get_bits(gb, 4); hdr->quant.qm_u = dav1d_get_bits(gb, 4); hdr->quant.qm_v = seqhdr->separate_uv_delta_q ? (int)dav1d_get_bits(gb, 4) : hdr->quant.qm_u; } #if DEBUG_FRAME_HDR printf("HDR: post-qm: off=%ld\n", (gb->ptr - init_ptr) * 8 - gb->bits_left); #endif // segmentation data hdr->segmentation.enabled = dav1d_get_bits(gb, 1); if (hdr->segmentation.enabled) { if (hdr->primary_ref_frame == PRIMARY_REF_NONE) { hdr->segmentation.update_map = 1; hdr->segmentation.temporal = 0; hdr->segmentation.update_data = 1; } else { hdr->segmentation.update_map = dav1d_get_bits(gb, 1); hdr->segmentation.temporal = hdr->segmentation.update_map ? dav1d_get_bits(gb, 1) : 0; hdr->segmentation.update_data = dav1d_get_bits(gb, 1); } if (hdr->segmentation.update_data) { hdr->segmentation.seg_data.preskip = 0; hdr->segmentation.seg_data.last_active_segid = -1; for (int i = 0; i < NUM_SEGMENTS; i++) { Av1SegmentationData *const seg = &hdr->segmentation.seg_data.d[i]; if (dav1d_get_bits(gb, 1)) { seg->delta_q = dav1d_get_sbits(gb, 8); hdr->segmentation.seg_data.last_active_segid = i; } else { seg->delta_q = 0; } if (dav1d_get_bits(gb, 1)) { seg->delta_lf_y_v = dav1d_get_sbits(gb, 6); hdr->segmentation.seg_data.last_active_segid = i; } else { seg->delta_lf_y_v = 0; } if (dav1d_get_bits(gb, 1)) { seg->delta_lf_y_h = dav1d_get_sbits(gb, 6); hdr->segmentation.seg_data.last_active_segid = i; } else { seg->delta_lf_y_h = 0; } if (dav1d_get_bits(gb, 1)) { seg->delta_lf_u = dav1d_get_sbits(gb, 6); hdr->segmentation.seg_data.last_active_segid = i; } else { seg->delta_lf_u = 0; } if (dav1d_get_bits(gb, 1)) { seg->delta_lf_v = dav1d_get_sbits(gb, 6); hdr->segmentation.seg_data.last_active_segid = i; } else { seg->delta_lf_v = 0; } if (dav1d_get_bits(gb, 1)) { seg->ref = dav1d_get_bits(gb, 3); hdr->segmentation.seg_data.last_active_segid = i; hdr->segmentation.seg_data.preskip = 1; } else { seg->ref = -1; } if ((seg->skip = dav1d_get_bits(gb, 1))) { hdr->segmentation.seg_data.last_active_segid = i; hdr->segmentation.seg_data.preskip = 1; } if ((seg->globalmv = dav1d_get_bits(gb, 1))) { hdr->segmentation.seg_data.last_active_segid = i; hdr->segmentation.seg_data.preskip = 1; } } } else if (hdr->primary_ref_frame == PRIMARY_REF_NONE) { memset(&hdr->segmentation.seg_data, 0, sizeof(Av1SegmentationDataSet)); } else { const int pri_ref = hdr->refidx[hdr->primary_ref_frame]; hdr->segmentation.seg_data = c->refs[pri_ref].seg_data; } } else if (hdr->primary_ref_frame == PRIMARY_REF_NONE) { memset(&hdr->segmentation.seg_data, 0, sizeof(Av1SegmentationDataSet)); } else { const int pri_ref = hdr->refidx[hdr->primary_ref_frame]; hdr->segmentation.seg_data = c->refs[pri_ref].seg_data; } #if DEBUG_FRAME_HDR printf("HDR: post-segmentation: off=%ld\n", (gb->ptr - init_ptr) * 8 - gb->bits_left); #endif // delta q hdr->delta.q.present = hdr->quant.yac ? dav1d_get_bits(gb, 1) : 0; hdr->delta.q.res_log2 = hdr->delta.q.present ? dav1d_get_bits(gb, 2) : 0; hdr->delta.lf.present = hdr->delta.q.present && !hdr->allow_intrabc && dav1d_get_bits(gb, 1); hdr->delta.lf.res_log2 = hdr->delta.lf.present ? dav1d_get_bits(gb, 2) : 0; hdr->delta.lf.multi = hdr->delta.lf.present ? dav1d_get_bits(gb, 1) : 0; #if DEBUG_FRAME_HDR printf("HDR: post-delta_q_lf_flags: off=%ld\n", (gb->ptr - init_ptr) * 8 - gb->bits_left); #endif // derive lossless flags const int delta_lossless = !hdr->quant.ydc_delta && !hdr->quant.udc_delta && !hdr->quant.uac_delta && !hdr->quant.vdc_delta && !hdr->quant.vac_delta; hdr->all_lossless = 1; for (int i = 0; i < NUM_SEGMENTS; i++) { hdr->segmentation.qidx[i] = hdr->segmentation.enabled ? iclip_u8(hdr->quant.yac + hdr->segmentation.seg_data.d[i].delta_q) : hdr->quant.yac; hdr->segmentation.lossless[i] = !hdr->segmentation.qidx[i] && delta_lossless; hdr->all_lossless &= hdr->segmentation.lossless[i]; } // loopfilter if (hdr->all_lossless || hdr->allow_intrabc) { hdr->loopfilter.level_y[0] = hdr->loopfilter.level_y[1] = 0; hdr->loopfilter.level_u = hdr->loopfilter.level_v = 0; hdr->loopfilter.sharpness = 0; hdr->loopfilter.mode_ref_delta_enabled = 1; hdr->loopfilter.mode_ref_delta_update = 1; hdr->loopfilter.mode_ref_deltas = default_mode_ref_deltas; } else { hdr->loopfilter.level_y[0] = dav1d_get_bits(gb, 6); hdr->loopfilter.level_y[1] = dav1d_get_bits(gb, 6); if (seqhdr->layout != DAV1D_PIXEL_LAYOUT_I400 && (hdr->loopfilter.level_y[0] || hdr->loopfilter.level_y[1])) { hdr->loopfilter.level_u = dav1d_get_bits(gb, 6); hdr->loopfilter.level_v = dav1d_get_bits(gb, 6); } hdr->loopfilter.sharpness = dav1d_get_bits(gb, 3); if (hdr->primary_ref_frame == PRIMARY_REF_NONE) { hdr->loopfilter.mode_ref_deltas = default_mode_ref_deltas; } else { const int ref = hdr->refidx[hdr->primary_ref_frame]; hdr->loopfilter.mode_ref_deltas = c->refs[ref].lf_mode_ref_deltas; } hdr->loopfilter.mode_ref_delta_enabled = dav1d_get_bits(gb, 1); if (hdr->loopfilter.mode_ref_delta_enabled) { hdr->loopfilter.mode_ref_delta_update = dav1d_get_bits(gb, 1); if (hdr->loopfilter.mode_ref_delta_update) { for (int i = 0; i < 8; i++) if (dav1d_get_bits(gb, 1)) hdr->loopfilter.mode_ref_deltas.ref_delta[i] = dav1d_get_sbits(gb, 6); for (int i = 0; i < 2; i++) if (dav1d_get_bits(gb, 1)) hdr->loopfilter.mode_ref_deltas.mode_delta[i] = dav1d_get_sbits(gb, 6); } } } #if DEBUG_FRAME_HDR printf("HDR: post-lpf: off=%ld\n", (gb->ptr - init_ptr) * 8 - gb->bits_left); #endif // cdef if (!hdr->all_lossless && seqhdr->cdef && !hdr->allow_intrabc) { hdr->cdef.damping = dav1d_get_bits(gb, 2) + 3; hdr->cdef.n_bits = dav1d_get_bits(gb, 2); for (int i = 0; i < (1 << hdr->cdef.n_bits); i++) { hdr->cdef.y_strength[i] = dav1d_get_bits(gb, 6); if (seqhdr->layout != DAV1D_PIXEL_LAYOUT_I400) hdr->cdef.uv_strength[i] = dav1d_get_bits(gb, 6); } } else { hdr->cdef.n_bits = 0; hdr->cdef.y_strength[0] = 0; hdr->cdef.uv_strength[0] = 0; } #if DEBUG_FRAME_HDR printf("HDR: post-cdef: off=%ld\n", (gb->ptr - init_ptr) * 8 - gb->bits_left); #endif // restoration if (!hdr->all_lossless && seqhdr->restoration && !hdr->allow_intrabc) { hdr->restoration.type[0] = dav1d_get_bits(gb, 2); if (seqhdr->layout != DAV1D_PIXEL_LAYOUT_I400) { hdr->restoration.type[1] = dav1d_get_bits(gb, 2); hdr->restoration.type[2] = dav1d_get_bits(gb, 2); } else { hdr->restoration.type[1] = hdr->restoration.type[2] = RESTORATION_NONE; } if (hdr->restoration.type[0] || hdr->restoration.type[1] || hdr->restoration.type[2]) { // Log2 of the restoration unit size. hdr->restoration.unit_size[0] = 6 + seqhdr->sb128; if (dav1d_get_bits(gb, 1)) { hdr->restoration.unit_size[0]++; if (!seqhdr->sb128) hdr->restoration.unit_size[0] += dav1d_get_bits(gb, 1); } hdr->restoration.unit_size[1] = hdr->restoration.unit_size[0]; if ((hdr->restoration.type[1] || hdr->restoration.type[2]) && seqhdr->layout == DAV1D_PIXEL_LAYOUT_I420) { hdr->restoration.unit_size[1] -= dav1d_get_bits(gb, 1); } } else { hdr->restoration.unit_size[0] = 8; } } else { hdr->restoration.type[0] = RESTORATION_NONE; hdr->restoration.type[1] = RESTORATION_NONE; hdr->restoration.type[2] = RESTORATION_NONE; } #if DEBUG_FRAME_HDR printf("HDR: post-restoration: off=%ld\n", (gb->ptr - init_ptr) * 8 - gb->bits_left); #endif hdr->txfm_mode = hdr->all_lossless ? TX_4X4_ONLY : dav1d_get_bits(gb, 1) ? TX_SWITCHABLE : TX_LARGEST; #if DEBUG_FRAME_HDR printf("HDR: post-txfmmode: off=%ld\n", (gb->ptr - init_ptr) * 8 - gb->bits_left); #endif hdr->switchable_comp_refs = hdr->frame_type & 1 ? dav1d_get_bits(gb, 1) : 0; #if DEBUG_FRAME_HDR printf("HDR: post-refmode: off=%ld\n", (gb->ptr - init_ptr) * 8 - gb->bits_left); #endif hdr->skip_mode_allowed = 0; if (hdr->switchable_comp_refs && hdr->frame_type & 1 && seqhdr->order_hint) { const unsigned poc = hdr->frame_offset; unsigned off_before[2] = { 0xFFFFFFFF, 0xFFFFFFFF }; int off_after = -1; int off_before_idx[2], off_after_idx; for (int i = 0; i < 7; i++) { const unsigned refpoc = c->refs[hdr->refidx[i]].p.p.poc; const int diff = get_poc_diff(seqhdr->order_hint_n_bits, refpoc, poc); if (diff > 0) { if (off_after == -1 || get_poc_diff(seqhdr->order_hint_n_bits, off_after, refpoc) > 0) { off_after = refpoc; off_after_idx = i; } } else if (diff < 0) { if (off_before[0] == 0xFFFFFFFFU || get_poc_diff(seqhdr->order_hint_n_bits, refpoc, off_before[0]) > 0) { off_before[1] = off_before[0]; off_before[0] = refpoc; off_before_idx[1] = off_before_idx[0]; off_before_idx[0] = i; } else if (refpoc != off_before[0] && (off_before[1] == 0xFFFFFFFFU || get_poc_diff(seqhdr->order_hint_n_bits, refpoc, off_before[1]) > 0)) { off_before[1] = refpoc; off_before_idx[1] = i; } } } if (off_before[0] != 0xFFFFFFFFU && off_after != -1) { hdr->skip_mode_refs[0] = imin(off_before_idx[0], off_after_idx); hdr->skip_mode_refs[1] = imax(off_before_idx[0], off_after_idx); hdr->skip_mode_allowed = 1; } else if (off_before[0] != 0xFFFFFFFFU && off_before[1] != 0xFFFFFFFFU) { hdr->skip_mode_refs[0] = imin(off_before_idx[0], off_before_idx[1]); hdr->skip_mode_refs[1] = imax(off_before_idx[0], off_before_idx[1]); hdr->skip_mode_allowed = 1; } } hdr->skip_mode_enabled = hdr->skip_mode_allowed ? dav1d_get_bits(gb, 1) : 0; #if DEBUG_FRAME_HDR printf("HDR: post-extskip: off=%ld\n", (gb->ptr - init_ptr) * 8 - gb->bits_left); #endif hdr->warp_motion = !hdr->error_resilient_mode && hdr->frame_type & 1 && seqhdr->warped_motion && dav1d_get_bits(gb, 1); #if DEBUG_FRAME_HDR printf("HDR: post-warpmotionbit: off=%ld\n", (gb->ptr - init_ptr) * 8 - gb->bits_left); #endif hdr->reduced_txtp_set = dav1d_get_bits(gb, 1); #if DEBUG_FRAME_HDR printf("HDR: post-reducedtxtpset: off=%ld\n", (gb->ptr - init_ptr) * 8 - gb->bits_left); #endif for (int i = 0; i < 7; i++) hdr->gmv[i] = dav1d_default_wm_params; if (hdr->frame_type & 1) { for (int i = 0; i < 7; i++) { hdr->gmv[i].type = !dav1d_get_bits(gb, 1) ? WM_TYPE_IDENTITY : dav1d_get_bits(gb, 1) ? WM_TYPE_ROT_ZOOM : dav1d_get_bits(gb, 1) ? WM_TYPE_TRANSLATION : WM_TYPE_AFFINE; if (hdr->gmv[i].type == WM_TYPE_IDENTITY) continue; const WarpedMotionParams *const ref_gmv = hdr->primary_ref_frame == PRIMARY_REF_NONE ? &dav1d_default_wm_params : &c->refs[hdr->refidx[hdr->primary_ref_frame]].gmv[i]; int32_t *const mat = hdr->gmv[i].matrix; const int32_t *const ref_mat = ref_gmv->matrix; int bits, shift; if (hdr->gmv[i].type >= WM_TYPE_ROT_ZOOM) { mat[2] = (1 << 16) + 2 * dav1d_get_bits_subexp(gb, (ref_mat[2] - (1 << 16)) >> 1, 12); mat[3] = 2 * dav1d_get_bits_subexp(gb, ref_mat[3] >> 1, 12); bits = 12; shift = 10; } else { bits = 9 - !hdr->hp; shift = 13 + !hdr->hp; } if (hdr->gmv[i].type == WM_TYPE_AFFINE) { mat[4] = 2 * dav1d_get_bits_subexp(gb, ref_mat[4] >> 1, 12); mat[5] = (1 << 16) + 2 * dav1d_get_bits_subexp(gb, (ref_mat[5] - (1 << 16)) >> 1, 12); } else { mat[4] = -mat[3]; mat[5] = mat[2]; } mat[0] = dav1d_get_bits_subexp(gb, ref_mat[0] >> shift, bits) * (1 << shift); mat[1] = dav1d_get_bits_subexp(gb, ref_mat[1] >> shift, bits) * (1 << shift); if (dav1d_get_shear_params(&hdr->gmv[i])) goto error; } } #if DEBUG_FRAME_HDR printf("HDR: post-gmv: off=%ld\n", (gb->ptr - init_ptr) * 8 - gb->bits_left); #endif hdr->film_grain.present = seqhdr->film_grain_present && (hdr->show_frame || hdr->showable_frame) && dav1d_get_bits(gb, 1); if (hdr->film_grain.present) { hdr->film_grain.seed = dav1d_get_bits(gb, 16); hdr->film_grain.update = hdr->frame_type != DAV1D_FRAME_TYPE_INTER || dav1d_get_bits(gb, 1); if (!hdr->film_grain.update) { const int refidx = dav1d_get_bits(gb, 3); int i; for (i = 0; i < 7; i++) if (hdr->refidx[i] == refidx) break; if (i == 7) goto error; hdr->film_grain.data = c->refs[refidx].film_grain; } else { Av1FilmGrainData *const fgd = &hdr->film_grain.data; fgd->num_y_points = dav1d_get_bits(gb, 4); if (fgd->num_y_points > 14) goto error; for (int i = 0; i < fgd->num_y_points; i++) { fgd->y_points[i][0] = dav1d_get_bits(gb, 8); if (i && fgd->y_points[i - 1][0] >= fgd->y_points[i][0]) goto error; fgd->y_points[i][1] = dav1d_get_bits(gb, 8); } fgd->chroma_scaling_from_luma = seqhdr->layout != DAV1D_PIXEL_LAYOUT_I400 && dav1d_get_bits(gb, 1); if (seqhdr->layout == DAV1D_PIXEL_LAYOUT_I400 || fgd->chroma_scaling_from_luma || (seqhdr->layout == DAV1D_PIXEL_LAYOUT_I420 && !fgd->num_y_points)) { fgd->num_uv_points[0] = fgd->num_uv_points[1] = 0; } else for (int pl = 0; pl < 2; pl++) { fgd->num_uv_points[pl] = dav1d_get_bits(gb, 4); if (fgd->num_uv_points[pl] > 10) goto error; for (int i = 0; i < fgd->num_uv_points[pl]; i++) { fgd->uv_points[pl][i][0] = dav1d_get_bits(gb, 8); if (i && fgd->uv_points[pl][i - 1][0] >= fgd->uv_points[pl][i][0]) goto error; fgd->uv_points[pl][i][1] = dav1d_get_bits(gb, 8); } } if (seqhdr->layout == DAV1D_PIXEL_LAYOUT_I420 && !!fgd->num_uv_points[0] != !!fgd->num_uv_points[1]) { goto error; } fgd->scaling_shift = dav1d_get_bits(gb, 2) + 8; fgd->ar_coeff_lag = dav1d_get_bits(gb, 2); const int num_y_pos = 2 * fgd->ar_coeff_lag * (fgd->ar_coeff_lag + 1); if (fgd->num_y_points) for (int i = 0; i < num_y_pos; i++) fgd->ar_coeffs_y[i] = dav1d_get_bits(gb, 8) - 128; for (int pl = 0; pl < 2; pl++) if (fgd->num_uv_points[pl] || fgd->chroma_scaling_from_luma) { const int num_uv_pos = num_y_pos + !!fgd->num_y_points; for (int i = 0; i < num_uv_pos; i++) fgd->ar_coeffs_uv[pl][i] = dav1d_get_bits(gb, 8) - 128; } fgd->ar_coeff_shift = dav1d_get_bits(gb, 2) + 6; fgd->grain_scale_shift = dav1d_get_bits(gb, 2); for (int pl = 0; pl < 2; pl++) if (fgd->num_uv_points[pl]) { fgd->uv_mult[pl] = dav1d_get_bits(gb, 8); fgd->uv_luma_mult[pl] = dav1d_get_bits(gb, 8); fgd->uv_offset[pl] = dav1d_get_bits(gb, 9); } fgd->overlap_flag = dav1d_get_bits(gb, 1); fgd->clip_to_restricted_range = dav1d_get_bits(gb, 1); } } else { memset(&hdr->film_grain.data, 0, sizeof(hdr->film_grain)); } #if DEBUG_FRAME_HDR printf("HDR: post-filmgrain: off=%ld\n", (gb->ptr - init_ptr) * 8 - gb->bits_left); #endif end: if (have_trailing_bit) dav1d_get_bits(gb, 1); // dummy bit return dav1d_flush_get_bits(gb) - init_ptr; error: fprintf(stderr, "Error parsing frame header\n"); return -EINVAL; } static int parse_tile_hdr(Dav1dContext *const c, GetBits *const gb) { const uint8_t *const init_ptr = gb->ptr; int have_tile_pos = 0; const int n_tiles = c->frame_hdr.tiling.cols * c->frame_hdr.tiling.rows; if (n_tiles > 1) have_tile_pos = dav1d_get_bits(gb, 1); if (have_tile_pos) { const int n_bits = c->frame_hdr.tiling.log2_cols + c->frame_hdr.tiling.log2_rows; c->tile[c->n_tile_data].start = dav1d_get_bits(gb, n_bits); c->tile[c->n_tile_data].end = dav1d_get_bits(gb, n_bits); } else { c->tile[c->n_tile_data].start = 0; c->tile[c->n_tile_data].end = n_tiles - 1; } return dav1d_flush_get_bits(gb) - init_ptr; } int dav1d_parse_obus(Dav1dContext *const c, Dav1dData *const in) { GetBits gb; int res; dav1d_init_get_bits(&gb, in->data, in->sz); // obu header dav1d_get_bits(&gb, 1); // obu_forbidden_bit const enum ObuType type = dav1d_get_bits(&gb, 4); const int has_extension = dav1d_get_bits(&gb, 1); const int has_length_field = dav1d_get_bits(&gb, 1); if (!has_length_field) goto error; dav1d_get_bits(&gb, 1); // reserved if (has_extension) { dav1d_get_bits(&gb, 3); // temporal_layer_id dav1d_get_bits(&gb, 2); // enhancement_layer_id dav1d_get_bits(&gb, 3); // reserved } // obu length field unsigned len = 0, more, i = 0; do { more = dav1d_get_bits(&gb, 1); unsigned bits = dav1d_get_bits(&gb, 7); if (i <= 3 || (i == 4 && bits < (1 << 4))) len |= bits << (i * 7); else if (bits) goto error; if (more && ++i == 8) goto error; } while (more); if (gb.error) goto error; unsigned off = dav1d_flush_get_bits(&gb) - in->data; const unsigned init_off = off; if (len > in->sz - off) goto error; switch (type) { case OBU_SEQ_HDR: if ((res = parse_seq_hdr(c, &gb)) < 0) return res; if ((unsigned)res != len) goto error; c->have_seq_hdr = 1; c->have_frame_hdr = 0; break; case OBU_REDUNDANT_FRAME_HDR: if (c->have_frame_hdr) break; // fall-through case OBU_FRAME: case OBU_FRAME_HDR: if (!c->have_seq_hdr) goto error; if ((res = parse_frame_hdr(c, &gb, type != OBU_FRAME)) < 0) return res; c->have_frame_hdr = 1; for (int n = 0; n < c->n_tile_data; n++) dav1d_data_unref(&c->tile[n].data); c->n_tile_data = 0; c->n_tiles = 0; if (type != OBU_FRAME) break; if (c->frame_hdr.show_existing_frame) goto error; off += res; // fall-through case OBU_TILE_GRP: if (!c->have_frame_hdr) goto error; if (c->n_tile_data >= 256) goto error; if ((res = parse_tile_hdr(c, &gb)) < 0) return res; off += res; if (off > len + init_off) goto error; dav1d_ref_inc(in->ref); c->tile[c->n_tile_data].data.ref = in->ref; c->tile[c->n_tile_data].data.data = in->data + off; c->tile[c->n_tile_data].data.sz = len + init_off - off; // ensure tile groups are in order and sane, see 6.10.1 if (c->tile[c->n_tile_data].start > c->tile[c->n_tile_data].end || c->tile[c->n_tile_data].start != c->n_tiles) { for (int i = 0; i <= c->n_tile_data; i++) dav1d_data_unref(&c->tile[i].data); c->n_tile_data = 0; c->n_tiles = 0; goto error; } c->n_tiles += 1 + c->tile[c->n_tile_data].end - c->tile[c->n_tile_data].start; c->n_tile_data++; break; case OBU_PADDING: case OBU_TD: case OBU_METADATA: // ignore OBUs we don't care about break; default: fprintf(stderr, "Unknown OBU type %d of size %u\n", type, len); return -EINVAL; } if (c->have_seq_hdr && c->have_frame_hdr && c->n_tiles == c->frame_hdr.tiling.cols * c->frame_hdr.tiling.rows) { if (!c->n_tile_data) return -EINVAL; if ((res = dav1d_submit_frame(c)) < 0) return res; assert(!c->n_tile_data); c->have_frame_hdr = 0; c->n_tiles = 0; } else if (c->have_seq_hdr && c->have_frame_hdr && c->frame_hdr.show_existing_frame) { if (c->n_fc == 1) { dav1d_picture_ref(&c->out, &c->refs[c->frame_hdr.existing_frame_idx].p.p); } else { // need to append this to the frame output queue const unsigned next = c->frame_thread.next++; if (c->frame_thread.next == c->n_fc) c->frame_thread.next = 0; Dav1dFrameContext *const f = &c->fc[next]; pthread_mutex_lock(&f->frame_thread.td.lock); while (f->n_tile_data > 0) pthread_cond_wait(&f->frame_thread.td.cond, &f->frame_thread.td.lock); Dav1dThreadPicture *const out_delayed = &c->frame_thread.out_delayed[next]; if (out_delayed->p.data[0]) { if (out_delayed->visible && !out_delayed->flushed) dav1d_picture_ref(&c->out, &out_delayed->p); dav1d_thread_picture_unref(out_delayed); } dav1d_thread_picture_ref(out_delayed, &c->refs[c->frame_hdr.existing_frame_idx].p); out_delayed->visible = 1; out_delayed->flushed = 0; pthread_mutex_unlock(&f->frame_thread.td.lock); } c->have_frame_hdr = 0; if (c->refs[c->frame_hdr.existing_frame_idx].p.p.p.type == DAV1D_FRAME_TYPE_KEY) { const int r = c->frame_hdr.existing_frame_idx; for (int i = 0; i < 8; i++) { if (i == c->frame_hdr.existing_frame_idx) continue; if (c->refs[i].p.p.data[0]) dav1d_thread_picture_unref(&c->refs[i].p); dav1d_thread_picture_ref(&c->refs[i].p, &c->refs[r].p); if (c->cdf[i].cdf) dav1d_cdf_thread_unref(&c->cdf[i]); dav1d_init_states(&c->cdf[i], c->refs[r].qidx); c->refs[i].lf_mode_ref_deltas = c->refs[r].lf_mode_ref_deltas; c->refs[i].seg_data = c->refs[r].seg_data; for (int j = 0; j < 7; j++) c->refs[i].gmv[j] = dav1d_default_wm_params; c->refs[i].film_grain = c->refs[r].film_grain; if (c->refs[i].segmap) dav1d_ref_dec(c->refs[i].segmap); c->refs[i].segmap = c->refs[r].segmap; if (c->refs[r].segmap) dav1d_ref_inc(c->refs[r].segmap); if (c->refs[i].refmvs) dav1d_ref_dec(c->refs[i].refmvs); c->refs[i].refmvs = NULL; c->refs[i].qidx = c->refs[r].qidx; } } } return len + init_off; error: fprintf(stderr, "Error parsing OBU data\n"); return -EINVAL; }