391 lines
11 KiB
C
391 lines
11 KiB
C
/*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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static int FUNC(frame_sync_code)(CodedBitstreamContext *ctx, RWContext *rw,
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VP9RawFrameHeader *current)
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{
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uint8_t frame_sync_byte_0 = VP9_FRAME_SYNC_0;
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uint8_t frame_sync_byte_1 = VP9_FRAME_SYNC_1;
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uint8_t frame_sync_byte_2 = VP9_FRAME_SYNC_2;
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int err;
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xf(8, frame_sync_byte_0, frame_sync_byte_0, 0);
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xf(8, frame_sync_byte_1, frame_sync_byte_1, 0);
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xf(8, frame_sync_byte_2, frame_sync_byte_2, 0);
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if (frame_sync_byte_0 != VP9_FRAME_SYNC_0 ||
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frame_sync_byte_1 != VP9_FRAME_SYNC_1 ||
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frame_sync_byte_2 != VP9_FRAME_SYNC_2) {
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av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid frame sync code: "
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"%02x %02x %02x.\n", frame_sync_byte_0,
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frame_sync_byte_1, frame_sync_byte_2);
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return AVERROR_INVALIDDATA;
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}
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return 0;
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}
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static int FUNC(color_config)(CodedBitstreamContext *ctx, RWContext *rw,
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VP9RawFrameHeader *current, int profile)
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{
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int err;
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if (profile >= 2)
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f(1, ten_or_twelve_bit);
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f(3, color_space);
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if (current->color_space != VP9_CS_RGB) {
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f(1, color_range);
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if (profile == 1 || profile == 3) {
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f(1, subsampling_x);
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f(1, subsampling_y);
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f(1, color_config_reserved_zero);
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} else {
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infer(subsampling_x, 1);
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infer(subsampling_y, 1);
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}
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} else {
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infer(color_range, 1);
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if (profile == 1 || profile == 3) {
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infer(subsampling_x, 0);
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infer(subsampling_y, 0);
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}
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}
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return 0;
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}
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static int FUNC(frame_size)(CodedBitstreamContext *ctx, RWContext *rw,
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VP9RawFrameHeader *current)
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{
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CodedBitstreamVP9Context *vp9 = ctx->priv_data;
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int err;
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f(16, frame_width_minus_1);
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f(16, frame_height_minus_1);
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vp9->mi_cols = (current->frame_width_minus_1 + 8) >> 3;
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vp9->mi_rows = (current->frame_height_minus_1 + 8) >> 3;
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vp9->sb64_cols = (vp9->mi_cols + 7) >> 3;
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vp9->sb64_rows = (vp9->mi_rows + 7) >> 3;
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return 0;
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}
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static int FUNC(render_size)(CodedBitstreamContext *ctx, RWContext *rw,
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VP9RawFrameHeader *current)
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{
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int err;
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f(1, render_and_frame_size_different);
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if (current->render_and_frame_size_different) {
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f(16, render_width_minus_1);
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f(16, render_height_minus_1);
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}
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return 0;
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}
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static int FUNC(frame_size_with_refs)(CodedBitstreamContext *ctx, RWContext *rw,
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VP9RawFrameHeader *current)
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{
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int err, i;
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for (i = 0; i < VP9_REFS_PER_FRAME; i++) {
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fs(1, found_ref[i], 1, i);
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if (current->found_ref[i])
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break;
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}
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if (i >= VP9_REFS_PER_FRAME)
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CHECK(FUNC(frame_size)(ctx, rw, current));
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CHECK(FUNC(render_size)(ctx, rw, current));
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return 0;
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}
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static int FUNC(interpolation_filter)(CodedBitstreamContext *ctx, RWContext *rw,
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VP9RawFrameHeader *current)
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{
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int err;
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f(1, is_filter_switchable);
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if (!current->is_filter_switchable)
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f(2, raw_interpolation_filter_type);
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return 0;
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}
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static int FUNC(loop_filter_params)(CodedBitstreamContext *ctx, RWContext *rw,
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VP9RawFrameHeader *current)
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{
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int err, i;
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f(6, loop_filter_level);
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f(3, loop_filter_sharpness);
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f(1, loop_filter_delta_enabled);
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if (current->loop_filter_delta_enabled) {
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f(1, loop_filter_delta_update);
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if (current->loop_filter_delta_update) {
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for (i = 0; i < VP9_MAX_REF_FRAMES; i++) {
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fs(1, update_ref_delta[i], 1, i);
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if (current->update_ref_delta[i])
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ss(6, loop_filter_ref_deltas[i], 1, i);
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}
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for (i = 0; i < 2; i++) {
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fs(1, update_mode_delta[i], 1, i);
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if (current->update_mode_delta[i])
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ss(6, loop_filter_mode_deltas[i], 1, i);
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}
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}
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}
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return 0;
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}
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static int FUNC(quantization_params)(CodedBitstreamContext *ctx, RWContext *rw,
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VP9RawFrameHeader *current)
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{
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int err;
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f(8, base_q_idx);
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delta_q(delta_q_y_dc);
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delta_q(delta_q_uv_dc);
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delta_q(delta_q_uv_ac);
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return 0;
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}
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static int FUNC(segmentation_params)(CodedBitstreamContext *ctx, RWContext *rw,
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VP9RawFrameHeader *current)
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{
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static const int segmentation_feature_bits[VP9_SEG_LVL_MAX] = { 8, 6, 2, 0 };
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static const int segmentation_feature_signed[VP9_SEG_LVL_MAX] = { 1, 1, 0, 0 };
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int err, i, j;
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f(1, segmentation_enabled);
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if (current->segmentation_enabled) {
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f(1, segmentation_update_map);
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if (current->segmentation_update_map) {
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for (i = 0; i < 7; i++)
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prob(segmentation_tree_probs[i], 1, i);
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f(1, segmentation_temporal_update);
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for (i = 0; i < 3; i++) {
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if (current->segmentation_temporal_update)
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prob(segmentation_pred_prob[i], 1, i);
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else
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infer(segmentation_pred_prob[i], 255);
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}
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}
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f(1, segmentation_update_data);
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if (current->segmentation_update_data) {
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f(1, segmentation_abs_or_delta_update);
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for (i = 0; i < VP9_MAX_SEGMENTS; i++) {
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for (j = 0; j < VP9_SEG_LVL_MAX; j++) {
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fs(1, feature_enabled[i][j], 2, i, j);
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if (current->feature_enabled[i][j] &&
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segmentation_feature_bits[j]) {
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fs(segmentation_feature_bits[j],
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feature_value[i][j], 2, i, j);
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if (segmentation_feature_signed[j])
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fs(1, feature_sign[i][j], 2, i, j);
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else
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infer(feature_sign[i][j], 0);
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} else {
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infer(feature_value[i][j], 0);
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infer(feature_sign[i][j], 0);
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}
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}
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}
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}
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}
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return 0;
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}
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static int FUNC(tile_info)(CodedBitstreamContext *ctx, RWContext *rw,
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VP9RawFrameHeader *current)
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{
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CodedBitstreamVP9Context *vp9 = ctx->priv_data;
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int min_log2_tile_cols, max_log2_tile_cols;
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int err;
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min_log2_tile_cols = 0;
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while ((VP9_MAX_TILE_WIDTH_B64 << min_log2_tile_cols) < vp9->sb64_cols)
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++min_log2_tile_cols;
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max_log2_tile_cols = 0;
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while ((vp9->sb64_cols >> (max_log2_tile_cols + 1)) >= VP9_MIN_TILE_WIDTH_B64)
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++max_log2_tile_cols;
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increment(tile_cols_log2, min_log2_tile_cols, max_log2_tile_cols);
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increment(tile_rows_log2, 0, 2);
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return 0;
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}
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static int FUNC(uncompressed_header)(CodedBitstreamContext *ctx, RWContext *rw,
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VP9RawFrameHeader *current)
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{
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int profile, i;
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int err;
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f(2, frame_marker);
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f(1, profile_low_bit);
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f(1, profile_high_bit);
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profile = (current->profile_high_bit << 1) + current->profile_low_bit;
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if (profile == 3)
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f(1, profile_reserved_zero);
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f(1, show_existing_frame);
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if (current->show_existing_frame) {
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f(3, frame_to_show_map_idx);
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infer(header_size_in_bytes, 0);
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infer(refresh_frame_flags, 0x00);
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infer(loop_filter_level, 0);
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return 0;
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}
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f(1, frame_type);
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f(1, show_frame);
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f(1, error_resilient_mode);
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if (current->frame_type == VP9_KEY_FRAME) {
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CHECK(FUNC(frame_sync_code)(ctx, rw, current));
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CHECK(FUNC(color_config)(ctx, rw, current, profile));
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CHECK(FUNC(frame_size)(ctx, rw, current));
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CHECK(FUNC(render_size)(ctx, rw, current));
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infer(refresh_frame_flags, 0xff);
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} else {
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if (current->show_frame == 0)
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f(1, intra_only);
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else
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infer(intra_only, 0);
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if (current->error_resilient_mode == 0)
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f(2, reset_frame_context);
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else
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infer(reset_frame_context, 0);
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if (current->intra_only == 1) {
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CHECK(FUNC(frame_sync_code)(ctx, rw, current));
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if (profile > 0) {
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CHECK(FUNC(color_config)(ctx, rw, current, profile));
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} else {
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infer(color_space, 1);
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infer(subsampling_x, 1);
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infer(subsampling_y, 1);
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}
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f(8, refresh_frame_flags);
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CHECK(FUNC(frame_size)(ctx, rw, current));
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CHECK(FUNC(render_size)(ctx, rw, current));
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} else {
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f(8, refresh_frame_flags);
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for (i = 0; i < VP9_REFS_PER_FRAME; i++) {
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fs(3, ref_frame_idx[i], 1, i);
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fs(1, ref_frame_sign_bias[VP9_LAST_FRAME + i],
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1, VP9_LAST_FRAME + i);
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}
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CHECK(FUNC(frame_size_with_refs)(ctx, rw, current));
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f(1, allow_high_precision_mv);
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CHECK(FUNC(interpolation_filter)(ctx, rw, current));
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}
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}
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if (current->error_resilient_mode == 0) {
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f(1, refresh_frame_context);
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f(1, frame_parallel_decoding_mode);
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} else {
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infer(refresh_frame_context, 0);
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infer(frame_parallel_decoding_mode, 1);
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}
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f(2, frame_context_idx);
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CHECK(FUNC(loop_filter_params)(ctx, rw, current));
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CHECK(FUNC(quantization_params)(ctx, rw, current));
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CHECK(FUNC(segmentation_params)(ctx, rw, current));
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CHECK(FUNC(tile_info)(ctx, rw, current));
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f(16, header_size_in_bytes);
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return 0;
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}
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static int FUNC(trailing_bits)(CodedBitstreamContext *ctx, RWContext *rw)
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{
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int err;
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av_unused int zero = 0;
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while (byte_alignment(rw) != 0)
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xf(1, zero_bit, zero, 0);
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return 0;
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}
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static int FUNC(frame)(CodedBitstreamContext *ctx, RWContext *rw,
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VP9RawFrame *current)
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{
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int err;
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HEADER("Frame");
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CHECK(FUNC(uncompressed_header)(ctx, rw, ¤t->header));
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CHECK(FUNC(trailing_bits)(ctx, rw));
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return 0;
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}
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static int FUNC(superframe_index)(CodedBitstreamContext *ctx, RWContext *rw,
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VP9RawSuperframeIndex *current)
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{
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int err, i;
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HEADER("Superframe Index");
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f(3, superframe_marker);
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f(2, bytes_per_framesize_minus_1);
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f(3, frames_in_superframe_minus_1);
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for (i = 0; i <= current->frames_in_superframe_minus_1; i++) {
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// Surprise little-endian!
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fle(8 * (current->bytes_per_framesize_minus_1 + 1),
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frame_sizes[i], 1, i);
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}
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f(3, superframe_marker);
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f(2, bytes_per_framesize_minus_1);
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f(3, frames_in_superframe_minus_1);
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return 0;
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}
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