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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>
134 lines
3.3 KiB
C
134 lines
3.3 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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#ifndef AVCODEC_CBS_VP8_H
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#define AVCODEC_CBS_VP8_H
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#include <stddef.h>
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#include <stdint.h>
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#include "cbs.h"
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enum {
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VP8_START_CODE_0 = 0x9D,
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VP8_START_CODE_1 = 0x01,
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VP8_START_CODE_2 = 0x2A,
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};
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enum {
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VP8_KEY_FRAME = 0,
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VP8_NON_KEY_FRAME = 1,
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};
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typedef struct VP8RawFrameHeader {
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// frame tag
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uint8_t frame_type;
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uint8_t profile;
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uint8_t show_frame;
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uint32_t first_partition_length_in_bytes;
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uint16_t width;
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uint8_t horizontal_scale;
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uint16_t height;
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uint8_t vertical_scale;
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// frame header
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uint8_t color_space;
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uint8_t clamping_type;
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// segmentation
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uint8_t segmentation_enable;
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uint8_t update_segment_map;
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uint8_t update_segment_feature_data;
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uint8_t segment_feature_mode;
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uint8_t segment_qp_update[4];
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int8_t segment_qp[4];
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uint8_t segment_loop_filter_level_update[4];
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int8_t segment_loop_filter_level[4];
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uint8_t segment_probs_update[3];
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uint8_t segment_probs[3];
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// loop filter
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uint8_t loop_filter_type;
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uint8_t loop_filter_level;
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uint8_t loop_filter_sharpness;
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uint8_t mode_ref_lf_delta_enable;
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uint8_t mode_ref_lf_delta_update;
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uint8_t ref_lf_deltas_update[4];
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int8_t ref_lf_deltas[4];
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uint8_t mode_lf_deltas_update[4];
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int8_t mode_lf_deltas[4];
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uint8_t log2_token_partitions;
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// qp
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uint8_t base_qindex;
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uint8_t y1dc_delta_q_present;
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int8_t y1dc_delta_q;
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uint8_t y2dc_delta_q_present;
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int8_t y2dc_delta_q;
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uint8_t y2ac_delta_q_present;
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int8_t y2ac_delta_q;
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uint8_t uvdc_delta_q_present;
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int8_t uvdc_delta_q;
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uint8_t uvac_delta_q_present;
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int8_t uvac_delta_q;
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// ref
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uint8_t refresh_golden_frame;
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uint8_t refresh_alternate_frame;
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uint8_t copy_buffer_to_golden;
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uint8_t copy_buffer_to_alternate;
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uint8_t ref_frame_sign_bias_golden;
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uint8_t ref_frame_sign_bias_alternate;
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uint8_t refresh_last_frame;
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uint8_t refresh_entropy_probs;
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// token probs
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uint8_t coeff_prob_update[4][8][3][11];
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uint8_t coeff_prob[4][8][3][11];
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uint8_t mb_no_skip_coeff;
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uint8_t prob_skip_false;
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uint8_t prob_intra;
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uint8_t prob_last;
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uint8_t prob_golden;
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uint8_t intra_16x16_prob_update;
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uint8_t intra_16x16_prob[4];
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uint8_t intra_chrome_prob_update;
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uint8_t intra_chrome_prob[3];
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// mv probs
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uint8_t mv_prob_update[2][19];
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uint8_t mv_prob[2][19];
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} VP8RawFrameHeader;
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typedef struct VP8RawFrame {
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VP8RawFrameHeader header;
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uint8_t *data;
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AVBufferRef *data_ref;
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size_t data_size;
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} VP8RawFrame;
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#endif /* AVCODEC_CBS_VP8_H */
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