c9fe9fb863
This commit adds support for VP8 bitstream read methods to the cbs codec. This enables the trace_headers bitstream filter to support VP8, in addition to AV1, H.264, H.265, and VP9. This can be useful for debugging VP8 stream issues. The CBS VP8 implements a simple VP8 boolean decoder using GetBitContext to read the bitstream. Only the read methods `read_unit` and `split_fragment` are implemented. The write methods `write_unit` and `assemble_fragment` return the error code AVERROR_PATCHWELCOME. This is because CBS VP8 write is unlikely to be used by any applications at the moment. The write methods can be added later if there is a real need for them. TESTS: ffmpeg -i fate-suite/vp8/frame_size_change.webm -vcodec copy -bsf:v trace_headers -f null - Signed-off-by: Jianhui Dai <jianhui.j.dai@intel.com> Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
249 lines
7.6 KiB
C
249 lines
7.6 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(update_segmentation)(CodedBitstreamContext *ctx,
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CBSVP8BoolCodingRW *bool_coding_rw,
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VP8RawFrameHeader *current)
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{
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bc_f(1, update_segment_map);
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bc_f(1, update_segment_feature_data);
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if (current->update_segment_feature_data) {
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bc_f(1, segment_feature_mode);
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// quantizer
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for (int i = 0; i < 4; i++) {
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bc_b(segment_qp_update[i]);
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if (current->segment_qp_update[i])
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bc_ss(7, segment_qp[i], 1, i);
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}
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// loop filter
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for (int i = 0; i < 4; i++) {
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bc_b(segment_loop_filter_level_update[i]);
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if (current->segment_loop_filter_level_update[i])
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bc_ss(6, segment_loop_filter_level[i], 1, i);
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}
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}
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if (current->update_segment_map) {
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for (int i = 0; i < 3; i++) {
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bc_b(segment_probs_update[i]);
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if (current->segment_probs_update[i])
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bc_fs(8, segment_probs[i], 1, i);
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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(mode_ref_lf_deltas)(CodedBitstreamContext *ctx,
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CBSVP8BoolCodingRW *bool_coding_rw,
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VP8RawFrameHeader *current)
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{
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bc_f(1, mode_ref_lf_delta_enable);
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if (current->mode_ref_lf_delta_enable) {
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bc_b(mode_ref_lf_delta_update);
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if (current->mode_ref_lf_delta_update) {
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// ref_lf_deltas
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for (int i = 0; i < 4; i++) {
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bc_b(ref_lf_deltas_update[i]);
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if (current->ref_lf_deltas_update[i])
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bc_ss(6, ref_lf_deltas[i], 1, i);
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}
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// mode_lf_deltas
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for (int i = 0; i < 4; i++) {
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bc_b(mode_lf_deltas_update[i]);
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if (current->mode_lf_deltas_update[i])
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bc_ss(6, mode_lf_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,
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CBSVP8BoolCodingRW *bool_coding_rw,
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VP8RawFrameHeader *current)
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{
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bc_f(7, base_qindex);
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bc_b(y1dc_delta_q_present);
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if (current->y1dc_delta_q_present)
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bc_s(4, y1dc_delta_q);
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bc_b(y2dc_delta_q_present);
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if (current->y2dc_delta_q_present)
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bc_s(4, y2dc_delta_q);
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bc_b(y2ac_delta_q_present);
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if (current->y2ac_delta_q_present)
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bc_s(4, y2ac_delta_q);
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bc_b(uvdc_delta_q_present);
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if (current->uvdc_delta_q_present)
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bc_s(4, uvdc_delta_q);
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bc_b(uvac_delta_q_present);
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if (current->uvac_delta_q_present)
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bc_s(4, uvac_delta_q);
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return 0;
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}
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static int FUNC(update_token_probs)(CodedBitstreamContext *ctx,
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CBSVP8BoolCodingRW *bool_coding_rw,
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VP8RawFrameHeader *current)
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{
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for (int i = 0; i < 4; ++i) {
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for (int j = 0; j < 8; ++j) {
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for (int k = 0; k < 3; ++k) {
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for (int l = 0; l < 11; ++l) {
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bc_b_prob(ff_vp8_token_update_probs[i][j][k][l],
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coeff_prob_update[i][j][k][l]);
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if (current->coeff_prob_update[i][j][k][l])
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bc_fs(8, coeff_prob[i][j][k][l], 4, i, j, k, l);
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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(update_mv_probs)(CodedBitstreamContext *ctx,
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CBSVP8BoolCodingRW *bool_coding_rw,
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VP8RawFrameHeader *current)
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{
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for (int i = 0; i < 2; ++i) {
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for (int j = 0; j < 19; ++j) {
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bc_b(mv_prob_update[i][j]);
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if (current->mv_prob_update[i][j])
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bc_fs(7, mv_prob[i][j], 2, i, j);
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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_tag)(CodedBitstreamContext *ctx, RWContext *rw,
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VP8RawFrameHeader *current)
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{
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f(1, frame_type);
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f(3, profile);
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f(1, show_frame);
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f(19, first_partition_length_in_bytes);
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if (current->frame_type == VP8_KEY_FRAME) {
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fixed(8, start_code_0, VP8_START_CODE_0);
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fixed(8, start_code_1, VP8_START_CODE_1);
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fixed(8, start_code_2, VP8_START_CODE_2);
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f(14, width);
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f(2, horizontal_scale);
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f(14, height);
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f(2, vertical_scale);
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}
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return 0;
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}
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static int FUNC(frame_header)(CodedBitstreamContext *ctx,
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CBSVP8BoolCodingRW *bool_coding_rw,
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VP8RawFrameHeader *current)
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{
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if (current->frame_type == VP8_KEY_FRAME) {
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bc_f(1, color_space);
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bc_f(1, clamping_type);
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}
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bc_f(1, segmentation_enable);
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if (current->segmentation_enable)
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CHECK(FUNC(update_segmentation)(ctx, bool_coding_rw, current));
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bc_f(1, loop_filter_type);
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bc_f(6, loop_filter_level);
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bc_f(3, loop_filter_sharpness);
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CHECK(FUNC(mode_ref_lf_deltas)(ctx, bool_coding_rw, current));
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bc_f(2, log2_token_partitions);
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CHECK(FUNC(quantization_params)(ctx, bool_coding_rw, current));
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if (current->frame_type != VP8_KEY_FRAME) {
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bc_f(1, refresh_golden_frame);
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bc_f(1, refresh_alternate_frame);
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if (!current->refresh_golden_frame)
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bc_f(2, copy_buffer_to_golden);
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if (!current->refresh_alternate_frame)
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bc_f(2, copy_buffer_to_alternate);
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bc_f(1, ref_frame_sign_bias_golden);
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bc_f(1, ref_frame_sign_bias_alternate);
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}
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bc_f(1, refresh_entropy_probs);
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if (current->frame_type != VP8_KEY_FRAME)
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bc_f(1, refresh_last_frame);
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CHECK(FUNC(update_token_probs)(ctx, bool_coding_rw, current));
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bc_f(1, mb_no_skip_coeff);
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if (current->mb_no_skip_coeff)
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bc_f(8, prob_skip_false);
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if (current->frame_type != VP8_KEY_FRAME) {
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bc_f(8, prob_intra);
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bc_f(8, prob_last);
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bc_f(8, prob_golden);
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// intra_16x16_prob
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bc_b(intra_16x16_prob_update);
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if (current->intra_16x16_prob_update)
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for (int i = 0; i < 4; i++)
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bc_fs(8, intra_16x16_prob[i], 1, i);
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// intra_chroma_prob
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bc_b(intra_chrome_prob_update);
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if (current->intra_chrome_prob_update)
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for (int i = 0; i < 3; i++)
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bc_fs(8, intra_chrome_prob[i], 1, i);
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CHECK(FUNC(update_mv_probs)(ctx, bool_coding_rw, current));
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}
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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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VP8RawFrame *current)
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{
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HEADER("Frame");
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CHECK(FUNC(frame_tag)(ctx, rw, ¤t->header));
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return 0;
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}
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static int FUNC(compressed_header)(CodedBitstreamContext *ctx,
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CBSVP8BoolCodingRW *bool_coding_rw,
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VP8RawFrame *current)
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{
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CHECK(FUNC(frame_header)(ctx, bool_coding_rw, ¤t->header));
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return 0;
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}
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