/* * AV1 video decoder * * 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 "libavutil/film_grain_params.h" #include "libavutil/pixdesc.h" #include "libavutil/opt.h" #include "avcodec.h" #include "av1dec.h" #include "bytestream.h" #include "hwconfig.h" #include "internal.h" #include "profiles.h" /**< same with Div_Lut defined in spec 7.11.3.7 */ static const uint16_t div_lut[AV1_DIV_LUT_NUM] = { 16384, 16320, 16257, 16194, 16132, 16070, 16009, 15948, 15888, 15828, 15768, 15709, 15650, 15592, 15534, 15477, 15420, 15364, 15308, 15252, 15197, 15142, 15087, 15033, 14980, 14926, 14873, 14821, 14769, 14717, 14665, 14614, 14564, 14513, 14463, 14413, 14364, 14315, 14266, 14218, 14170, 14122, 14075, 14028, 13981, 13935, 13888, 13843, 13797, 13752, 13707, 13662, 13618, 13574, 13530, 13487, 13443, 13400, 13358, 13315, 13273, 13231, 13190, 13148, 13107, 13066, 13026, 12985, 12945, 12906, 12866, 12827, 12788, 12749, 12710, 12672, 12633, 12596, 12558, 12520, 12483, 12446, 12409, 12373, 12336, 12300, 12264, 12228, 12193, 12157, 12122, 12087, 12053, 12018, 11984, 11950, 11916, 11882, 11848, 11815, 11782, 11749, 11716, 11683, 11651, 11619, 11586, 11555, 11523, 11491, 11460, 11429, 11398, 11367, 11336, 11305, 11275, 11245, 11215, 11185, 11155, 11125, 11096, 11067, 11038, 11009, 10980, 10951, 10923, 10894, 10866, 10838, 10810, 10782, 10755, 10727, 10700, 10673, 10645, 10618, 10592, 10565, 10538, 10512, 10486, 10460, 10434, 10408, 10382, 10356, 10331, 10305, 10280, 10255, 10230, 10205, 10180, 10156, 10131, 10107, 10082, 10058, 10034, 10010, 9986, 9963, 9939, 9916, 9892, 9869, 9846, 9823, 9800, 9777, 9754, 9732, 9709, 9687, 9664, 9642, 9620, 9598, 9576, 9554, 9533, 9511, 9489, 9468, 9447, 9425, 9404, 9383, 9362, 9341, 9321, 9300, 9279, 9259, 9239, 9218, 9198, 9178, 9158, 9138, 9118, 9098, 9079, 9059, 9039, 9020, 9001, 8981, 8962, 8943, 8924, 8905, 8886, 8867, 8849, 8830, 8812, 8793, 8775, 8756, 8738, 8720, 8702, 8684, 8666, 8648, 8630, 8613, 8595, 8577, 8560, 8542, 8525, 8508, 8490, 8473, 8456, 8439, 8422, 8405, 8389, 8372, 8355, 8339, 8322, 8306, 8289, 8273, 8257, 8240, 8224, 8208, 8192 }; static uint32_t inverse_recenter(int r, uint32_t v) { if (v > 2 * r) return v; else if (v & 1) return r - ((v + 1) >> 1); else return r + (v >> 1); } static uint32_t decode_unsigned_subexp_with_ref(uint32_t sub_exp, int mx, int r) { if ((r << 1) <= mx) { return inverse_recenter(r, sub_exp); } else { return mx - 1 - inverse_recenter(mx - 1 - r, sub_exp); } } static int32_t decode_signed_subexp_with_ref(uint32_t sub_exp, int low, int high, int r) { int32_t x = decode_unsigned_subexp_with_ref(sub_exp, high - low, r - low); return x + low; } static void read_global_param(AV1DecContext *s, int type, int ref, int idx) { uint8_t primary_frame, prev_frame; uint32_t abs_bits, prec_bits, round, prec_diff, sub, mx; int32_t r, prev_gm_param; primary_frame = s->raw_frame_header->primary_ref_frame; prev_frame = s->raw_frame_header->ref_frame_idx[primary_frame]; abs_bits = AV1_GM_ABS_ALPHA_BITS; prec_bits = AV1_GM_ALPHA_PREC_BITS; /* setup_past_independence() sets PrevGmParams to default values. We can * simply point to the current's frame gm_params as they will be initialized * with defaults at this point. */ if (s->raw_frame_header->primary_ref_frame == AV1_PRIMARY_REF_NONE) prev_gm_param = s->cur_frame.gm_params[ref][idx]; else prev_gm_param = s->ref[prev_frame].gm_params[ref][idx]; if (idx < 2) { if (type == AV1_WARP_MODEL_TRANSLATION) { abs_bits = AV1_GM_ABS_TRANS_ONLY_BITS - !s->raw_frame_header->allow_high_precision_mv; prec_bits = AV1_GM_TRANS_ONLY_PREC_BITS - !s->raw_frame_header->allow_high_precision_mv; } else { abs_bits = AV1_GM_ABS_TRANS_BITS; prec_bits = AV1_GM_TRANS_PREC_BITS; } } round = (idx % 3) == 2 ? (1 << AV1_WARPEDMODEL_PREC_BITS) : 0; prec_diff = AV1_WARPEDMODEL_PREC_BITS - prec_bits; sub = (idx % 3) == 2 ? (1 << prec_bits) : 0; mx = 1 << abs_bits; r = (prev_gm_param >> prec_diff) - sub; s->cur_frame.gm_params[ref][idx] = (decode_signed_subexp_with_ref(s->raw_frame_header->gm_params[ref][idx], -mx, mx + 1, r) << prec_diff) + round; } static uint64_t round_two(uint64_t x, uint16_t n) { if (n == 0) return x; return ((x + ((uint64_t)1 << (n - 1))) >> n); } static int64_t round_two_signed(int64_t x, uint16_t n) { return ((x<0) ? -((int64_t)round_two(-x, n)) : (int64_t)round_two(x, n)); } /** * Resolve divisor process. * see spec 7.11.3.7 */ static int16_t resolve_divisor(uint32_t d, uint16_t *shift) { int32_t e, f; *shift = av_log2(d); e = d - (1 << (*shift)); if (*shift > AV1_DIV_LUT_BITS) f = round_two(e, *shift - AV1_DIV_LUT_BITS); else f = e << (AV1_DIV_LUT_BITS - (*shift)); *shift += AV1_DIV_LUT_PREC_BITS; return div_lut[f]; } /** * check if global motion params is valid. * see spec 7.11.3.6 */ static uint8_t get_shear_params_valid(AV1DecContext *s, int idx) { int16_t alpha, beta, gamma, delta, divf, divs; int64_t v, w; int32_t *param = &s->cur_frame.gm_params[idx][0]; if (param[2] < 0) return 0; alpha = av_clip_int16(param[2] - (1 << AV1_WARPEDMODEL_PREC_BITS)); beta = av_clip_int16(param[3]); divf = resolve_divisor(abs(param[2]), &divs); v = (int64_t)param[4] * (1 << AV1_WARPEDMODEL_PREC_BITS); w = (int64_t)param[3] * param[4]; gamma = av_clip_int16((int)round_two_signed((v * divf), divs)); delta = av_clip_int16(param[5] - (int)round_two_signed((w * divf), divs) - (1 << AV1_WARPEDMODEL_PREC_BITS)); alpha = round_two_signed(alpha, AV1_WARP_PARAM_REDUCE_BITS) << AV1_WARP_PARAM_REDUCE_BITS; beta = round_two_signed(beta, AV1_WARP_PARAM_REDUCE_BITS) << AV1_WARP_PARAM_REDUCE_BITS; gamma = round_two_signed(gamma, AV1_WARP_PARAM_REDUCE_BITS) << AV1_WARP_PARAM_REDUCE_BITS; delta = round_two_signed(delta, AV1_WARP_PARAM_REDUCE_BITS) << AV1_WARP_PARAM_REDUCE_BITS; if ((4 * abs(alpha) + 7 * abs(beta)) >= (1 << AV1_WARPEDMODEL_PREC_BITS) || (4 * abs(gamma) + 4 * abs(delta)) >= (1 << AV1_WARPEDMODEL_PREC_BITS)) return 0; return 1; } /** * update gm type/params, since cbs already implemented part of this funcation, * so we don't need to full implement spec. */ static void global_motion_params(AV1DecContext *s) { const AV1RawFrameHeader *header = s->raw_frame_header; int type, ref; for (ref = AV1_REF_FRAME_LAST; ref <= AV1_REF_FRAME_ALTREF; ref++) { s->cur_frame.gm_type[ref] = AV1_WARP_MODEL_IDENTITY; for (int i = 0; i < 6; i++) s->cur_frame.gm_params[ref][i] = (i % 3 == 2) ? 1 << AV1_WARPEDMODEL_PREC_BITS : 0; } if (header->frame_type == AV1_FRAME_KEY || header->frame_type == AV1_FRAME_INTRA_ONLY) return; for (ref = AV1_REF_FRAME_LAST; ref <= AV1_REF_FRAME_ALTREF; ref++) { if (header->is_global[ref]) { if (header->is_rot_zoom[ref]) { type = AV1_WARP_MODEL_ROTZOOM; } else { type = header->is_translation[ref] ? AV1_WARP_MODEL_TRANSLATION : AV1_WARP_MODEL_AFFINE; } } else { type = AV1_WARP_MODEL_IDENTITY; } s->cur_frame.gm_type[ref] = type; if (type >= AV1_WARP_MODEL_ROTZOOM) { read_global_param(s, type, ref, 2); read_global_param(s, type, ref, 3); if (type == AV1_WARP_MODEL_AFFINE) { read_global_param(s, type, ref, 4); read_global_param(s, type, ref, 5); } else { s->cur_frame.gm_params[ref][4] = -s->cur_frame.gm_params[ref][3]; s->cur_frame.gm_params[ref][5] = s->cur_frame.gm_params[ref][2]; } } if (type >= AV1_WARP_MODEL_TRANSLATION) { read_global_param(s, type, ref, 0); read_global_param(s, type, ref, 1); } if (type <= AV1_WARP_MODEL_AFFINE) { s->cur_frame.gm_invalid[ref] = !get_shear_params_valid(s, ref); } } } static int get_relative_dist(const AV1RawSequenceHeader *seq, unsigned int a, unsigned int b) { unsigned int diff = a - b; unsigned int m = 1 << seq->order_hint_bits_minus_1; return (diff & (m - 1)) - (diff & m); } static void skip_mode_params(AV1DecContext *s) { const AV1RawFrameHeader *header = s->raw_frame_header; const AV1RawSequenceHeader *seq = s->raw_seq; int forward_idx, backward_idx; int forward_hint, backward_hint; int second_forward_idx, second_forward_hint; int ref_hint, dist, i; if (!header->skip_mode_present) return; forward_idx = -1; backward_idx = -1; for (i = 0; i < AV1_REFS_PER_FRAME; i++) { ref_hint = s->ref[header->ref_frame_idx[i]].raw_frame_header->order_hint; dist = get_relative_dist(seq, ref_hint, header->order_hint); if (dist < 0) { if (forward_idx < 0 || get_relative_dist(seq, ref_hint, forward_hint) > 0) { forward_idx = i; forward_hint = ref_hint; } } else if (dist > 0) { if (backward_idx < 0 || get_relative_dist(seq, ref_hint, backward_hint) < 0) { backward_idx = i; backward_hint = ref_hint; } } } if (forward_idx < 0) { return; } else if (backward_idx >= 0) { s->cur_frame.skip_mode_frame_idx[0] = AV1_REF_FRAME_LAST + FFMIN(forward_idx, backward_idx); s->cur_frame.skip_mode_frame_idx[1] = AV1_REF_FRAME_LAST + FFMAX(forward_idx, backward_idx); return; } second_forward_idx = -1; for (i = 0; i < AV1_REFS_PER_FRAME; i++) { ref_hint = s->ref[header->ref_frame_idx[i]].raw_frame_header->order_hint; if (get_relative_dist(seq, ref_hint, forward_hint) < 0) { if (second_forward_idx < 0 || get_relative_dist(seq, ref_hint, second_forward_hint) > 0) { second_forward_idx = i; second_forward_hint = ref_hint; } } } if (second_forward_idx < 0) return; s->cur_frame.skip_mode_frame_idx[0] = AV1_REF_FRAME_LAST + FFMIN(forward_idx, second_forward_idx); s->cur_frame.skip_mode_frame_idx[1] = AV1_REF_FRAME_LAST + FFMAX(forward_idx, second_forward_idx); } static void coded_lossless_param(AV1DecContext *s) { const AV1RawFrameHeader *header = s->raw_frame_header; int i; if (header->delta_q_y_dc || header->delta_q_u_ac || header->delta_q_u_dc || header->delta_q_v_ac || header->delta_q_v_dc) { s->cur_frame.coded_lossless = 0; return; } s->cur_frame.coded_lossless = 1; for (i = 0; i < AV1_MAX_SEGMENTS; i++) { int qindex; if (header->feature_enabled[i][AV1_SEG_LVL_ALT_Q]) { qindex = (header->base_q_idx + header->feature_value[i][AV1_SEG_LVL_ALT_Q]); } else { qindex = header->base_q_idx; } qindex = av_clip_uintp2(qindex, 8); if (qindex) { s->cur_frame.coded_lossless = 0; return; } } } static void load_grain_params(AV1DecContext *s) { const AV1RawFrameHeader *header = s->raw_frame_header; const AV1RawFilmGrainParams *film_grain = &header->film_grain, *src; AV1RawFilmGrainParams *dst = &s->cur_frame.film_grain; if (!film_grain->apply_grain) return; if (film_grain->update_grain) { memcpy(dst, film_grain, sizeof(*dst)); return; } src = &s->ref[film_grain->film_grain_params_ref_idx].film_grain; memcpy(dst, src, sizeof(*dst)); dst->grain_seed = film_grain->grain_seed; } static int init_tile_data(AV1DecContext *s) { int cur_tile_num = s->raw_frame_header->tile_cols * s->raw_frame_header->tile_rows; if (s->tile_num < cur_tile_num) { int ret = av_reallocp_array(&s->tile_group_info, cur_tile_num, sizeof(TileGroupInfo)); if (ret < 0) { s->tile_num = 0; return ret; } } s->tile_num = cur_tile_num; return 0; } static int get_tiles_info(AVCodecContext *avctx, const AV1RawTileGroup *tile_group) { AV1DecContext *s = avctx->priv_data; GetByteContext gb; uint16_t tile_num, tile_row, tile_col; uint32_t size = 0, size_bytes = 0; bytestream2_init(&gb, tile_group->tile_data.data, tile_group->tile_data.data_size); s->tg_start = tile_group->tg_start; s->tg_end = tile_group->tg_end; for (tile_num = tile_group->tg_start; tile_num <= tile_group->tg_end; tile_num++) { tile_row = tile_num / s->raw_frame_header->tile_cols; tile_col = tile_num % s->raw_frame_header->tile_cols; if (tile_num == tile_group->tg_end) { s->tile_group_info[tile_num].tile_size = bytestream2_get_bytes_left(&gb); s->tile_group_info[tile_num].tile_offset = bytestream2_tell(&gb); s->tile_group_info[tile_num].tile_row = tile_row; s->tile_group_info[tile_num].tile_column = tile_col; return 0; } size_bytes = s->raw_frame_header->tile_size_bytes_minus1 + 1; if (bytestream2_get_bytes_left(&gb) < size_bytes) return AVERROR_INVALIDDATA; size = 0; for (int i = 0; i < size_bytes; i++) size |= bytestream2_get_byteu(&gb) << 8 * i; if (bytestream2_get_bytes_left(&gb) <= size) return AVERROR_INVALIDDATA; size++; s->tile_group_info[tile_num].tile_size = size; s->tile_group_info[tile_num].tile_offset = bytestream2_tell(&gb); s->tile_group_info[tile_num].tile_row = tile_row; s->tile_group_info[tile_num].tile_column = tile_col; bytestream2_skipu(&gb, size); } return 0; } static int get_pixel_format(AVCodecContext *avctx) { AV1DecContext *s = avctx->priv_data; const AV1RawSequenceHeader *seq = s->raw_seq; uint8_t bit_depth; int ret; enum AVPixelFormat pix_fmt = AV_PIX_FMT_NONE; #define HWACCEL_MAX (CONFIG_AV1_DXVA2_HWACCEL + \ CONFIG_AV1_D3D11VA_HWACCEL * 2 + \ CONFIG_AV1_NVDEC_HWACCEL + \ CONFIG_AV1_VAAPI_HWACCEL) enum AVPixelFormat pix_fmts[HWACCEL_MAX + 2], *fmtp = pix_fmts; if (seq->seq_profile == 2 && seq->color_config.high_bitdepth) bit_depth = seq->color_config.twelve_bit ? 12 : 10; else if (seq->seq_profile <= 2) bit_depth = seq->color_config.high_bitdepth ? 10 : 8; else { av_log(avctx, AV_LOG_ERROR, "Unknown AV1 profile %d.\n", seq->seq_profile); return -1; } if (!seq->color_config.mono_chrome) { // 4:4:4 x:0 y:0, 4:2:2 x:1 y:0, 4:2:0 x:1 y:1 if (seq->color_config.subsampling_x == 0 && seq->color_config.subsampling_y == 0) { if (bit_depth == 8) pix_fmt = AV_PIX_FMT_YUV444P; else if (bit_depth == 10) pix_fmt = AV_PIX_FMT_YUV444P10; else if (bit_depth == 12) pix_fmt = AV_PIX_FMT_YUV444P12; else av_log(avctx, AV_LOG_WARNING, "Unknown AV1 pixel format.\n"); } else if (seq->color_config.subsampling_x == 1 && seq->color_config.subsampling_y == 0) { if (bit_depth == 8) pix_fmt = AV_PIX_FMT_YUV422P; else if (bit_depth == 10) pix_fmt = AV_PIX_FMT_YUV422P10; else if (bit_depth == 12) pix_fmt = AV_PIX_FMT_YUV422P12; else av_log(avctx, AV_LOG_WARNING, "Unknown AV1 pixel format.\n"); } else if (seq->color_config.subsampling_x == 1 && seq->color_config.subsampling_y == 1) { if (bit_depth == 8) pix_fmt = AV_PIX_FMT_YUV420P; else if (bit_depth == 10) pix_fmt = AV_PIX_FMT_YUV420P10; else if (bit_depth == 12) pix_fmt = AV_PIX_FMT_YUV420P12; else av_log(avctx, AV_LOG_WARNING, "Unknown AV1 pixel format.\n"); } } else { if (bit_depth == 8) pix_fmt = AV_PIX_FMT_GRAY8; else if (bit_depth == 10) pix_fmt = AV_PIX_FMT_GRAY10; else if (bit_depth == 12) pix_fmt = AV_PIX_FMT_GRAY12; else av_log(avctx, AV_LOG_WARNING, "Unknown AV1 pixel format.\n"); } av_log(avctx, AV_LOG_DEBUG, "AV1 decode get format: %s.\n", av_get_pix_fmt_name(pix_fmt)); if (pix_fmt == AV_PIX_FMT_NONE) return -1; s->pix_fmt = pix_fmt; switch (s->pix_fmt) { case AV_PIX_FMT_YUV420P: #if CONFIG_AV1_DXVA2_HWACCEL *fmtp++ = AV_PIX_FMT_DXVA2_VLD; #endif #if CONFIG_AV1_D3D11VA_HWACCEL *fmtp++ = AV_PIX_FMT_D3D11VA_VLD; *fmtp++ = AV_PIX_FMT_D3D11; #endif #if CONFIG_AV1_NVDEC_HWACCEL *fmtp++ = AV_PIX_FMT_CUDA; #endif #if CONFIG_AV1_VAAPI_HWACCEL *fmtp++ = AV_PIX_FMT_VAAPI; #endif break; case AV_PIX_FMT_YUV420P10: #if CONFIG_AV1_DXVA2_HWACCEL *fmtp++ = AV_PIX_FMT_DXVA2_VLD; #endif #if CONFIG_AV1_D3D11VA_HWACCEL *fmtp++ = AV_PIX_FMT_D3D11VA_VLD; *fmtp++ = AV_PIX_FMT_D3D11; #endif #if CONFIG_AV1_NVDEC_HWACCEL *fmtp++ = AV_PIX_FMT_CUDA; #endif #if CONFIG_AV1_VAAPI_HWACCEL *fmtp++ = AV_PIX_FMT_VAAPI; #endif break; case AV_PIX_FMT_GRAY8: #if CONFIG_AV1_NVDEC_HWACCEL *fmtp++ = AV_PIX_FMT_CUDA; #endif break; case AV_PIX_FMT_GRAY10: #if CONFIG_AV1_NVDEC_HWACCEL *fmtp++ = AV_PIX_FMT_CUDA; #endif break; } *fmtp++ = s->pix_fmt; *fmtp = AV_PIX_FMT_NONE; ret = ff_thread_get_format(avctx, pix_fmts); if (ret < 0) return ret; /** * check if the HW accel is inited correctly. If not, return un-implemented. * Since now the av1 decoder doesn't support native decode, if it will be * implemented in the future, need remove this check. */ if (!avctx->hwaccel) { av_log(avctx, AV_LOG_ERROR, "Your platform doesn't suppport" " hardware accelerated AV1 decoding.\n"); return AVERROR(ENOSYS); } avctx->pix_fmt = ret; return 0; } static void av1_frame_unref(AVCodecContext *avctx, AV1Frame *f) { ff_thread_release_buffer(avctx, &f->tf); av_buffer_unref(&f->hwaccel_priv_buf); f->hwaccel_picture_private = NULL; av_buffer_unref(&f->header_ref); f->raw_frame_header = NULL; f->spatial_id = f->temporal_id = 0; memset(f->skip_mode_frame_idx, 0, 2 * sizeof(uint8_t)); memset(&f->film_grain, 0, sizeof(f->film_grain)); f->coded_lossless = 0; } static int av1_frame_ref(AVCodecContext *avctx, AV1Frame *dst, const AV1Frame *src) { int ret; ret = av_buffer_replace(&dst->header_ref, src->header_ref); if (ret < 0) return ret; dst->raw_frame_header = src->raw_frame_header; if (!src->tf.f->buf[0]) return 0; ret = ff_thread_ref_frame(&dst->tf, &src->tf); if (ret < 0) goto fail; if (src->hwaccel_picture_private) { dst->hwaccel_priv_buf = av_buffer_ref(src->hwaccel_priv_buf); if (!dst->hwaccel_priv_buf) goto fail; dst->hwaccel_picture_private = dst->hwaccel_priv_buf->data; } dst->spatial_id = src->spatial_id; dst->temporal_id = src->temporal_id; memcpy(dst->gm_invalid, src->gm_invalid, AV1_NUM_REF_FRAMES * sizeof(uint8_t)); memcpy(dst->gm_type, src->gm_type, AV1_NUM_REF_FRAMES * sizeof(uint8_t)); memcpy(dst->gm_params, src->gm_params, AV1_NUM_REF_FRAMES * 6 * sizeof(int32_t)); memcpy(dst->skip_mode_frame_idx, src->skip_mode_frame_idx, 2 * sizeof(uint8_t)); memcpy(&dst->film_grain, &src->film_grain, sizeof(dst->film_grain)); dst->coded_lossless = src->coded_lossless; return 0; fail: av1_frame_unref(avctx, dst); return AVERROR(ENOMEM); } static av_cold int av1_decode_free(AVCodecContext *avctx) { AV1DecContext *s = avctx->priv_data; for (int i = 0; i < FF_ARRAY_ELEMS(s->ref); i++) { av1_frame_unref(avctx, &s->ref[i]); av_frame_free(&s->ref[i].tf.f); } av1_frame_unref(avctx, &s->cur_frame); av_frame_free(&s->cur_frame.tf.f); av_buffer_unref(&s->seq_ref); av_buffer_unref(&s->header_ref); av_freep(&s->tile_group_info); ff_cbs_fragment_free(&s->current_obu); ff_cbs_close(&s->cbc); return 0; } static int set_context_with_sequence(AVCodecContext *avctx, const AV1RawSequenceHeader *seq) { int width = seq->max_frame_width_minus_1 + 1; int height = seq->max_frame_height_minus_1 + 1; avctx->profile = seq->seq_profile; avctx->level = seq->seq_level_idx[0]; avctx->color_range = seq->color_config.color_range ? AVCOL_RANGE_JPEG : AVCOL_RANGE_MPEG; avctx->color_primaries = seq->color_config.color_primaries; avctx->colorspace = seq->color_config.color_primaries; avctx->color_trc = seq->color_config.transfer_characteristics; switch (seq->color_config.chroma_sample_position) { case AV1_CSP_VERTICAL: avctx->chroma_sample_location = AVCHROMA_LOC_LEFT; break; case AV1_CSP_COLOCATED: avctx->chroma_sample_location = AVCHROMA_LOC_TOPLEFT; break; } if (seq->film_grain_params_present) avctx->properties |= FF_CODEC_PROPERTY_FILM_GRAIN; else avctx->properties &= ~FF_CODEC_PROPERTY_FILM_GRAIN; if (avctx->width != width || avctx->height != height) { int ret = ff_set_dimensions(avctx, width, height); if (ret < 0) return ret; } avctx->sample_aspect_ratio = (AVRational) { 1, 1 }; if (seq->timing_info.num_units_in_display_tick && seq->timing_info.time_scale) { av_reduce(&avctx->framerate.den, &avctx->framerate.num, seq->timing_info.num_units_in_display_tick, seq->timing_info.time_scale, INT_MAX); if (seq->timing_info.equal_picture_interval) avctx->ticks_per_frame = seq->timing_info.num_ticks_per_picture_minus_1 + 1; } return 0; } static int update_context_with_frame_header(AVCodecContext *avctx, const AV1RawFrameHeader *header) { AVRational aspect_ratio; int width = header->frame_width_minus_1 + 1; int height = header->frame_height_minus_1 + 1; int r_width = header->render_width_minus_1 + 1; int r_height = header->render_height_minus_1 + 1; int ret; if (avctx->width != width || avctx->height != height) { ret = ff_set_dimensions(avctx, width, height); if (ret < 0) return ret; } av_reduce(&aspect_ratio.num, &aspect_ratio.den, (int64_t)height * r_width, (int64_t)width * r_height, INT_MAX); if (av_cmp_q(avctx->sample_aspect_ratio, aspect_ratio)) { ret = ff_set_sar(avctx, aspect_ratio); if (ret < 0) return ret; } return 0; } static av_cold int av1_decode_init(AVCodecContext *avctx) { AV1DecContext *s = avctx->priv_data; AV1RawSequenceHeader *seq; int ret; s->avctx = avctx; s->pix_fmt = AV_PIX_FMT_NONE; for (int i = 0; i < FF_ARRAY_ELEMS(s->ref); i++) { s->ref[i].tf.f = av_frame_alloc(); if (!s->ref[i].tf.f) { av_log(avctx, AV_LOG_ERROR, "Failed to allocate reference frame buffer %d.\n", i); return AVERROR(ENOMEM); } } s->cur_frame.tf.f = av_frame_alloc(); if (!s->cur_frame.tf.f) { av_log(avctx, AV_LOG_ERROR, "Failed to allocate current frame buffer.\n"); return AVERROR(ENOMEM); } ret = ff_cbs_init(&s->cbc, AV_CODEC_ID_AV1, avctx); if (ret < 0) return ret; av_opt_set_int(s->cbc->priv_data, "operating_point", s->operating_point, 0); if (avctx->extradata && avctx->extradata_size) { ret = ff_cbs_read_extradata_from_codec(s->cbc, &s->current_obu, avctx); if (ret < 0) { av_log(avctx, AV_LOG_WARNING, "Failed to read extradata.\n"); return ret; } seq = ((CodedBitstreamAV1Context *)(s->cbc->priv_data))->sequence_header; if (!seq) { av_log(avctx, AV_LOG_WARNING, "No sequence header available.\n"); goto end; } ret = set_context_with_sequence(avctx, seq); if (ret < 0) { av_log(avctx, AV_LOG_WARNING, "Failed to set decoder context.\n"); goto end; } end: ff_cbs_fragment_reset(&s->current_obu); } return ret; } static int av1_frame_alloc(AVCodecContext *avctx, AV1Frame *f) { AV1DecContext *s = avctx->priv_data; AV1RawFrameHeader *header= s->raw_frame_header; AVFrame *frame; int ret; ret = update_context_with_frame_header(avctx, header); if (ret < 0) { av_log(avctx, AV_LOG_ERROR, "Failed to update context with frame header\n"); return ret; } if ((ret = ff_thread_get_buffer(avctx, &f->tf, AV_GET_BUFFER_FLAG_REF)) < 0) goto fail; frame = f->tf.f; frame->key_frame = header->frame_type == AV1_FRAME_KEY; switch (header->frame_type) { case AV1_FRAME_KEY: case AV1_FRAME_INTRA_ONLY: frame->pict_type = AV_PICTURE_TYPE_I; break; case AV1_FRAME_INTER: frame->pict_type = AV_PICTURE_TYPE_P; break; case AV1_FRAME_SWITCH: frame->pict_type = AV_PICTURE_TYPE_SP; break; } if (avctx->hwaccel) { const AVHWAccel *hwaccel = avctx->hwaccel; if (hwaccel->frame_priv_data_size) { f->hwaccel_priv_buf = av_buffer_allocz(hwaccel->frame_priv_data_size); if (!f->hwaccel_priv_buf) { ret = AVERROR(ENOMEM); goto fail; } f->hwaccel_picture_private = f->hwaccel_priv_buf->data; } } return 0; fail: av1_frame_unref(avctx, f); return ret; } static int export_film_grain(AVCodecContext *avctx, AVFrame *frame) { AV1DecContext *s = avctx->priv_data; const AV1RawFilmGrainParams *film_grain = &s->cur_frame.film_grain; AVFilmGrainParams *fgp; AVFilmGrainAOMParams *aom; if (!film_grain->apply_grain) return 0; fgp = av_film_grain_params_create_side_data(frame); if (!fgp) return AVERROR(ENOMEM); fgp->type = AV_FILM_GRAIN_PARAMS_AV1; fgp->seed = film_grain->grain_seed; aom = &fgp->codec.aom; aom->chroma_scaling_from_luma = film_grain->chroma_scaling_from_luma; aom->scaling_shift = film_grain->grain_scaling_minus_8 + 8; aom->ar_coeff_lag = film_grain->ar_coeff_lag; aom->ar_coeff_shift = film_grain->ar_coeff_shift_minus_6 + 6; aom->grain_scale_shift = film_grain->grain_scale_shift; aom->overlap_flag = film_grain->overlap_flag; aom->limit_output_range = film_grain->clip_to_restricted_range; aom->num_y_points = film_grain->num_y_points; for (int i = 0; i < film_grain->num_y_points; i++) { aom->y_points[i][0] = film_grain->point_y_value[i]; aom->y_points[i][1] = film_grain->point_y_scaling[i]; } aom->num_uv_points[0] = film_grain->num_cb_points; for (int i = 0; i < film_grain->num_cb_points; i++) { aom->uv_points[0][i][0] = film_grain->point_cb_value[i]; aom->uv_points[0][i][1] = film_grain->point_cb_scaling[i]; } aom->num_uv_points[1] = film_grain->num_cr_points; for (int i = 0; i < film_grain->num_cr_points; i++) { aom->uv_points[1][i][0] = film_grain->point_cr_value[i]; aom->uv_points[1][i][1] = film_grain->point_cr_scaling[i]; } for (int i = 0; i < 24; i++) { aom->ar_coeffs_y[i] = film_grain->ar_coeffs_y_plus_128[i] - 128; } for (int i = 0; i < 25; i++) { aom->ar_coeffs_uv[0][i] = film_grain->ar_coeffs_cb_plus_128[i] - 128; aom->ar_coeffs_uv[1][i] = film_grain->ar_coeffs_cr_plus_128[i] - 128; } aom->uv_mult[0] = film_grain->cb_mult; aom->uv_mult[1] = film_grain->cr_mult; aom->uv_mult_luma[0] = film_grain->cb_luma_mult; aom->uv_mult_luma[1] = film_grain->cr_luma_mult; aom->uv_offset[0] = film_grain->cb_offset; aom->uv_offset[1] = film_grain->cr_offset; return 0; } static int set_output_frame(AVCodecContext *avctx, AVFrame *frame, const AVPacket *pkt, int *got_frame) { AV1DecContext *s = avctx->priv_data; const AVFrame *srcframe = s->cur_frame.tf.f; int ret; // TODO: all layers if (s->operating_point_idc && av_log2(s->operating_point_idc >> 8) > s->cur_frame.spatial_id) return 0; ret = av_frame_ref(frame, srcframe); if (ret < 0) return ret; if (avctx->export_side_data & AV_CODEC_EXPORT_DATA_FILM_GRAIN) { ret = export_film_grain(avctx, frame); if (ret < 0) { av_frame_unref(frame); return ret; } } frame->pts = pkt->pts; frame->pkt_dts = pkt->dts; frame->pkt_size = pkt->size; *got_frame = 1; return 0; } static int update_reference_list(AVCodecContext *avctx) { AV1DecContext *s = avctx->priv_data; const AV1RawFrameHeader *header = s->raw_frame_header; int ret; for (int i = 0; i < AV1_NUM_REF_FRAMES; i++) { if (header->refresh_frame_flags & (1 << i)) { av1_frame_unref(avctx, &s->ref[i]); if ((ret = av1_frame_ref(avctx, &s->ref[i], &s->cur_frame)) < 0) { av_log(avctx, AV_LOG_ERROR, "Failed to update frame %d in reference list\n", i); return ret; } } } return 0; } static int get_current_frame(AVCodecContext *avctx) { AV1DecContext *s = avctx->priv_data; int ret; av1_frame_unref(avctx, &s->cur_frame); s->cur_frame.header_ref = av_buffer_ref(s->header_ref); if (!s->cur_frame.header_ref) return AVERROR(ENOMEM); s->cur_frame.raw_frame_header = s->raw_frame_header; ret = init_tile_data(s); if (ret < 0) { av_log(avctx, AV_LOG_ERROR, "Failed to init tile data.\n"); return ret; } if ((avctx->skip_frame >= AVDISCARD_NONINTRA && (s->raw_frame_header->frame_type != AV1_FRAME_KEY && s->raw_frame_header->frame_type != AV1_FRAME_INTRA_ONLY)) || (avctx->skip_frame >= AVDISCARD_NONKEY && s->raw_frame_header->frame_type != AV1_FRAME_KEY) || avctx->skip_frame >= AVDISCARD_ALL) return 0; ret = av1_frame_alloc(avctx, &s->cur_frame); if (ret < 0) { av_log(avctx, AV_LOG_ERROR, "Failed to allocate space for current frame.\n"); return ret; } global_motion_params(s); skip_mode_params(s); coded_lossless_param(s); load_grain_params(s); return ret; } static int av1_decode_frame(AVCodecContext *avctx, void *frame, int *got_frame, AVPacket *pkt) { AV1DecContext *s = avctx->priv_data; AV1RawTileGroup *raw_tile_group = NULL; int ret; ret = ff_cbs_read_packet(s->cbc, &s->current_obu, pkt); if (ret < 0) { av_log(avctx, AV_LOG_ERROR, "Failed to read packet.\n"); goto end; } av_log(avctx, AV_LOG_DEBUG, "Total obu for this frame:%d.\n", s->current_obu.nb_units); for (int i = 0; i < s->current_obu.nb_units; i++) { CodedBitstreamUnit *unit = &s->current_obu.units[i]; AV1RawOBU *obu = unit->content; const AV1RawOBUHeader *header; if (!obu) continue; header = &obu->header; av_log(avctx, AV_LOG_DEBUG, "Obu idx:%d, obu type:%d.\n", i, unit->type); switch (unit->type) { case AV1_OBU_SEQUENCE_HEADER: av_buffer_unref(&s->seq_ref); s->seq_ref = av_buffer_ref(unit->content_ref); if (!s->seq_ref) { ret = AVERROR(ENOMEM); goto end; } s->raw_seq = &obu->obu.sequence_header; ret = set_context_with_sequence(avctx, s->raw_seq); if (ret < 0) { av_log(avctx, AV_LOG_ERROR, "Failed to set context.\n"); s->raw_seq = NULL; goto end; } s->operating_point_idc = s->raw_seq->operating_point_idc[s->operating_point]; if (s->pix_fmt == AV_PIX_FMT_NONE) { ret = get_pixel_format(avctx); if (ret < 0) { av_log(avctx, AV_LOG_ERROR, "Failed to get pixel format.\n"); s->raw_seq = NULL; goto end; } } if (avctx->hwaccel && avctx->hwaccel->decode_params) { ret = avctx->hwaccel->decode_params(avctx, unit->type, unit->data, unit->data_size); if (ret < 0) { av_log(avctx, AV_LOG_ERROR, "HW accel decode params fail.\n"); s->raw_seq = NULL; goto end; } } break; case AV1_OBU_REDUNDANT_FRAME_HEADER: if (s->raw_frame_header) break; // fall-through case AV1_OBU_FRAME: case AV1_OBU_FRAME_HEADER: if (!s->raw_seq) { av_log(avctx, AV_LOG_ERROR, "Missing Sequence Header.\n"); ret = AVERROR_INVALIDDATA; goto end; } av_buffer_unref(&s->header_ref); s->header_ref = av_buffer_ref(unit->content_ref); if (!s->header_ref) { ret = AVERROR(ENOMEM); goto end; } if (unit->type == AV1_OBU_FRAME) s->raw_frame_header = &obu->obu.frame.header; else s->raw_frame_header = &obu->obu.frame_header; if (s->raw_frame_header->show_existing_frame) { av1_frame_unref(avctx, &s->cur_frame); ret = av1_frame_ref(avctx, &s->cur_frame, &s->ref[s->raw_frame_header->frame_to_show_map_idx]); if (ret < 0) { av_log(avctx, AV_LOG_ERROR, "Failed to get reference frame.\n"); goto end; } ret = update_reference_list(avctx); if (ret < 0) { av_log(avctx, AV_LOG_ERROR, "Failed to update reference list.\n"); goto end; } if (s->cur_frame.tf.f->buf[0]) { ret = set_output_frame(avctx, frame, pkt, got_frame); if (ret < 0) av_log(avctx, AV_LOG_ERROR, "Set output frame error.\n"); } s->raw_frame_header = NULL; goto end; } ret = get_current_frame(avctx); if (ret < 0) { av_log(avctx, AV_LOG_ERROR, "Get current frame error\n"); goto end; } s->cur_frame.spatial_id = header->spatial_id; s->cur_frame.temporal_id = header->temporal_id; if (avctx->hwaccel && s->cur_frame.tf.f->buf[0]) { ret = avctx->hwaccel->start_frame(avctx, unit->data, unit->data_size); if (ret < 0) { av_log(avctx, AV_LOG_ERROR, "HW accel start frame fail.\n"); goto end; } } if (unit->type != AV1_OBU_FRAME) break; // fall-through case AV1_OBU_TILE_GROUP: if (!s->raw_frame_header) { av_log(avctx, AV_LOG_ERROR, "Missing Frame Header.\n"); ret = AVERROR_INVALIDDATA; goto end; } if (unit->type == AV1_OBU_FRAME) raw_tile_group = &obu->obu.frame.tile_group; else raw_tile_group = &obu->obu.tile_group; ret = get_tiles_info(avctx, raw_tile_group); if (ret < 0) goto end; if (avctx->hwaccel && s->cur_frame.tf.f->buf[0]) { ret = avctx->hwaccel->decode_slice(avctx, raw_tile_group->tile_data.data, raw_tile_group->tile_data.data_size); if (ret < 0) { av_log(avctx, AV_LOG_ERROR, "HW accel decode slice fail.\n"); goto end; } } break; case AV1_OBU_TILE_LIST: case AV1_OBU_TEMPORAL_DELIMITER: case AV1_OBU_PADDING: case AV1_OBU_METADATA: break; default: av_log(avctx, AV_LOG_DEBUG, "Unknown obu type: %d (%"SIZE_SPECIFIER" bits).\n", unit->type, unit->data_size); } if (raw_tile_group && (s->tile_num == raw_tile_group->tg_end + 1)) { if (avctx->hwaccel && s->cur_frame.tf.f->buf[0]) { ret = avctx->hwaccel->end_frame(avctx); if (ret < 0) { av_log(avctx, AV_LOG_ERROR, "HW accel end frame fail.\n"); goto end; } } ret = update_reference_list(avctx); if (ret < 0) { av_log(avctx, AV_LOG_ERROR, "Failed to update reference list.\n"); goto end; } if (s->raw_frame_header->show_frame && s->cur_frame.tf.f->buf[0]) { ret = set_output_frame(avctx, frame, pkt, got_frame); if (ret < 0) { av_log(avctx, AV_LOG_ERROR, "Set output frame error\n"); goto end; } } raw_tile_group = NULL; s->raw_frame_header = NULL; } } end: ff_cbs_fragment_reset(&s->current_obu); if (ret < 0) s->raw_frame_header = NULL; return ret; } static void av1_decode_flush(AVCodecContext *avctx) { AV1DecContext *s = avctx->priv_data; for (int i = 0; i < FF_ARRAY_ELEMS(s->ref); i++) av1_frame_unref(avctx, &s->ref[i]); av1_frame_unref(avctx, &s->cur_frame); s->operating_point_idc = 0; s->raw_frame_header = NULL; s->raw_seq = NULL; ff_cbs_flush(s->cbc); } #define OFFSET(x) offsetof(AV1DecContext, x) #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM static const AVOption av1_options[] = { { "operating_point", "Select an operating point of the scalable bitstream", OFFSET(operating_point), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, AV1_MAX_OPERATING_POINTS - 1, VD }, { NULL } }; static const AVClass av1_class = { .class_name = "AV1 decoder", .item_name = av_default_item_name, .option = av1_options, .version = LIBAVUTIL_VERSION_INT, }; const AVCodec ff_av1_decoder = { .name = "av1", .long_name = NULL_IF_CONFIG_SMALL("Alliance for Open Media AV1"), .type = AVMEDIA_TYPE_VIDEO, .id = AV_CODEC_ID_AV1, .priv_data_size = sizeof(AV1DecContext), .init = av1_decode_init, .close = av1_decode_free, .decode = av1_decode_frame, .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_AVOID_PROBING, .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP | FF_CODEC_CAP_SETS_PKT_DTS, .flush = av1_decode_flush, .profiles = NULL_IF_CONFIG_SMALL(ff_av1_profiles), .priv_class = &av1_class, .bsfs = "av1_frame_split", .hw_configs = (const AVCodecHWConfigInternal *const []) { #if CONFIG_AV1_DXVA2_HWACCEL HWACCEL_DXVA2(av1), #endif #if CONFIG_AV1_D3D11VA_HWACCEL HWACCEL_D3D11VA(av1), #endif #if CONFIG_AV1_D3D11VA2_HWACCEL HWACCEL_D3D11VA2(av1), #endif #if CONFIG_AV1_NVDEC_HWACCEL HWACCEL_NVDEC(av1), #endif #if CONFIG_AV1_VAAPI_HWACCEL HWACCEL_VAAPI(av1), #endif NULL }, };