diff options
Diffstat (limited to 'media/ffvpx/libavcodec/av1dec.c')
| -rw-r--r-- | media/ffvpx/libavcodec/av1dec.c | 1286 |
1 files changed, 1286 insertions, 0 deletions
diff --git a/media/ffvpx/libavcodec/av1dec.c b/media/ffvpx/libavcodec/av1dec.c new file mode 100644 index 0000000000..d83c902f1f --- /dev/null +++ b/media/ffvpx/libavcodec/av1dec.c @@ -0,0 +1,1286 @@ +/* + * 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 "config_components.h" + +#include "libavutil/film_grain_params.h" +#include "libavutil/pixdesc.h" +#include "libavutil/opt.h" +#include "avcodec.h" +#include "av1dec.h" +#include "bytestream.h" +#include "codec_internal.h" +#include "decode.h" +#include "hwconfig.h" +#include "profiles.h" +#include "thread.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 function, +* 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 + \ + CONFIG_AV1_VDPAU_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; + + switch (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 +#if CONFIG_AV1_VDPAU_HWACCEL + *fmtp++ = AV_PIX_FMT_VDPAU; +#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 +#if CONFIG_AV1_VDPAU_HWACCEL + *fmtp++ = AV_PIX_FMT_VDPAU; +#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++ = 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 support" + " hardware accelerated AV1 decoding.\n"); + return AVERROR(ENOSYS); + } + + s->pix_fmt = pix_fmt; + avctx->pix_fmt = ret; + + return 0; +} + +static void av1_frame_unref(AVCodecContext *avctx, AV1Frame *f) +{ + ff_thread_release_buffer(avctx, f->f); + 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->f->buf[0]) + return 0; + + ret = av_frame_ref(dst->f, src->f); + 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].f); + } + av1_frame_unref(avctx, &s->cur_frame); + av_frame_free(&s->cur_frame.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].f = av_frame_alloc(); + if (!s->ref[i].f) { + av_log(avctx, AV_LOG_ERROR, + "Failed to allocate reference frame buffer %d.\n", i); + return AVERROR(ENOMEM); + } + } + + s->cur_frame.f = av_frame_alloc(); + if (!s->cur_frame.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->f, AV_GET_BUFFER_FLAG_REF)) < 0) + goto fail; + + frame = f->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.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, AVFrame *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.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.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.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.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.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 FFCodec ff_av1_decoder = { + .p.name = "av1", + CODEC_LONG_NAME("Alliance for Open Media AV1"), + .p.type = AVMEDIA_TYPE_VIDEO, + .p.id = AV_CODEC_ID_AV1, + .priv_data_size = sizeof(AV1DecContext), + .init = av1_decode_init, + .close = av1_decode_free, + FF_CODEC_DECODE_CB(av1_decode_frame), + .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_AVOID_PROBING, + .caps_internal = FF_CODEC_CAP_INIT_CLEANUP | + FF_CODEC_CAP_SETS_PKT_DTS, + .flush = av1_decode_flush, + .p.profiles = NULL_IF_CONFIG_SMALL(ff_av1_profiles), + .p.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 +#if CONFIG_AV1_VDPAU_HWACCEL + HWACCEL_VDPAU(av1), +#endif + + NULL + }, +}; 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