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avformat/av1: update ff_isom_write_av1c() to the latest revision of the spec
This will get ISOBMFF and Matroska up to date with the revised AV1 Codec Configuration Box spec. For now keep propagating raw OBUs as extradata until all libavcodec modules are adapted to handle AV1CodecConfigurationRecord formatted extradata. Tested-by: Thomas Daede <bztdlinux@gmail.com> Signed-off-by: James Almer <jamrial@gmail.com>
This commit is contained in:
James Almer
parent
96a7099f3e
commit
8d5604a69a
@ -22,6 +22,8 @@
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#include "libavutil/mem.h"
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#include "libavcodec/av1.h"
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#include "libavcodec/av1_parse.h"
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#include "libavcodec/profiles.h"
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#include "libavcodec/put_bits.h"
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#include "av1.h"
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#include "avio.h"
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@ -73,9 +75,233 @@ int ff_av1_filter_obus_buf(const uint8_t *buf, uint8_t **out, int *size)
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return ret;
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}
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typedef struct AV1SequenceParameters {
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uint8_t seq_profile;
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uint8_t seq_level_idx_0;
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uint8_t seq_tier_0;
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uint8_t high_bitdepth;
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uint8_t twelve_bit;
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uint8_t monochrome;
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uint8_t chroma_subsampling_x;
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uint8_t chroma_subsampling_y;
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uint8_t chroma_sample_position;
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} AV1SequenceParameters;
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static inline void uvlc(GetBitContext *gb)
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{
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int leading_zeros = 0;
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while (get_bits_left(gb)) {
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if (get_bits1(gb))
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break;
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leading_zeros++;
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}
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if (leading_zeros >= 32)
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return;
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skip_bits_long(gb, leading_zeros);
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}
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static int parse_color_config(AV1SequenceParameters *seq_params, GetBitContext *gb)
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{
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int color_primaries, transfer_characteristics, matrix_coefficients;
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seq_params->high_bitdepth = get_bits1(gb);
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if (seq_params->seq_profile == FF_PROFILE_AV1_PROFESSIONAL && seq_params->high_bitdepth)
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seq_params->twelve_bit = get_bits1(gb);
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else
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seq_params->twelve_bit = 0;
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if (seq_params->seq_profile == FF_PROFILE_AV1_HIGH)
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seq_params->monochrome = 0;
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else
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seq_params->monochrome = get_bits1(gb);
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if (get_bits1(gb)) { // color_description_present_flag
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color_primaries = get_bits(gb, 8);
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transfer_characteristics = get_bits(gb, 8);
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matrix_coefficients = get_bits(gb, 8);
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} else {
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color_primaries = AVCOL_PRI_UNSPECIFIED;
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transfer_characteristics = AVCOL_TRC_UNSPECIFIED;
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matrix_coefficients = AVCOL_SPC_UNSPECIFIED;
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}
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if (seq_params->monochrome) {
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skip_bits1(gb); // color_range
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seq_params->chroma_subsampling_x = 1;
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seq_params->chroma_subsampling_y = 1;
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seq_params->chroma_sample_position = 0;
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return 0;
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} else if (color_primaries == AVCOL_PRI_BT709 &&
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transfer_characteristics == AVCOL_TRC_IEC61966_2_1 &&
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matrix_coefficients == AVCOL_SPC_RGB) {
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seq_params->chroma_subsampling_x = 0;
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seq_params->chroma_subsampling_y = 0;
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} else {
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skip_bits1(gb); // color_range
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if (seq_params->seq_profile == FF_PROFILE_AV1_MAIN) {
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seq_params->chroma_subsampling_x = 1;
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seq_params->chroma_subsampling_y = 1;
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} else if (seq_params->seq_profile == FF_PROFILE_AV1_HIGH) {
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seq_params->chroma_subsampling_x = 0;
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seq_params->chroma_subsampling_y = 0;
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} else {
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if (seq_params->twelve_bit) {
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seq_params->chroma_subsampling_x = get_bits1(gb);
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if (seq_params->chroma_subsampling_x)
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seq_params->chroma_subsampling_y = get_bits1(gb);
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else
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seq_params->chroma_subsampling_y = 0;
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} else {
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seq_params->chroma_subsampling_x = 1;
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seq_params->chroma_subsampling_y = 0;
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}
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}
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if (seq_params->chroma_subsampling_x && seq_params->chroma_subsampling_y)
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seq_params->chroma_sample_position = get_bits(gb, 2);
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}
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skip_bits1(gb); // separate_uv_delta_q
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return 0;
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}
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static int parse_sequence_header(AV1SequenceParameters *seq_params, const uint8_t *buf, int size)
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{
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GetBitContext gb;
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int reduced_still_picture_header;
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int frame_width_bits_minus_1, frame_height_bits_minus_1;
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int size_bits, ret;
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size_bits = get_obu_bit_length(buf, size, AV1_OBU_SEQUENCE_HEADER);
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if (size_bits < 0)
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return size_bits;
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ret = init_get_bits(&gb, buf, size_bits);
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if (ret < 0)
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return ret;
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seq_params->seq_profile = get_bits(&gb, 3);
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skip_bits1(&gb); // still_picture
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reduced_still_picture_header = get_bits1(&gb);
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if (reduced_still_picture_header) {
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seq_params->seq_level_idx_0 = get_bits(&gb, 5);
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seq_params->seq_tier_0 = 0;
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} else {
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int initial_display_delay_present_flag, operating_points_cnt_minus_1;
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int decoder_model_info_present_flag, buffer_delay_length_minus_1;
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if (get_bits1(&gb)) { // timing_info_present_flag
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skip_bits_long(&gb, 32); // num_units_in_display_tick
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skip_bits_long(&gb, 32); // time_scale
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if (get_bits1(&gb)) // equal_picture_interval
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uvlc(&gb); // num_ticks_per_picture_minus_1
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decoder_model_info_present_flag = get_bits1(&gb);
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if (decoder_model_info_present_flag) {
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buffer_delay_length_minus_1 = get_bits(&gb, 5);
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skip_bits_long(&gb, 32); // num_units_in_decoding_tick
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skip_bits(&gb, 10); // buffer_removal_time_length_minus_1 (5)
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// frame_presentation_time_length_minus_1 (5)
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}
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} else
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decoder_model_info_present_flag = 0;
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initial_display_delay_present_flag = get_bits1(&gb);
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operating_points_cnt_minus_1 = get_bits(&gb, 5);
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for (int i = 0; i <= operating_points_cnt_minus_1; i++) {
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int seq_level_idx, seq_tier;
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skip_bits(&gb, 12); // operating_point_idc
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seq_level_idx = get_bits(&gb, 5);
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if (seq_level_idx > 7)
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seq_tier = get_bits1(&gb);
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else
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seq_tier = 0;
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if (decoder_model_info_present_flag) {
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if (get_bits1(&gb)) { // decoder_model_present_for_this_op
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skip_bits_long(&gb, buffer_delay_length_minus_1 + 1); // decoder_buffer_delay
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skip_bits_long(&gb, buffer_delay_length_minus_1 + 1); // encoder_buffer_delay
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skip_bits1(&gb); // low_delay_mode_flag
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}
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}
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if (initial_display_delay_present_flag) {
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if (get_bits1(&gb)) // initial_display_delay_present_for_this_op
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skip_bits(&gb, 4); // initial_display_delay_minus_1
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}
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if (i == 0) {
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seq_params->seq_level_idx_0 = seq_level_idx;
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seq_params->seq_tier_0 = seq_tier;
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}
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}
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}
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frame_width_bits_minus_1 = get_bits(&gb, 4);
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frame_height_bits_minus_1 = get_bits(&gb, 4);
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skip_bits(&gb, frame_width_bits_minus_1 + 1); // max_frame_width_minus_1
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skip_bits(&gb, frame_height_bits_minus_1 + 1); // max_frame_height_minus_1
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if (!reduced_still_picture_header) {
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if (get_bits1(&gb)) // frame_id_numbers_present_flag
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skip_bits(&gb, 7); // delta_frame_id_length_minus_2 (4), additional_frame_id_length_minus_1 (3)
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}
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skip_bits(&gb, 3); // use_128x128_superblock (1), enable_filter_intra (1), enable_intra_edge_filter (1)
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if (!reduced_still_picture_header) {
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int enable_order_hint, seq_force_screen_content_tools;
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skip_bits(&gb, 4); // enable_intraintra_compound (1), enable_masked_compound (1)
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// enable_warped_motion (1), enable_dual_filter (1)
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enable_order_hint = get_bits1(&gb);
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if (enable_order_hint)
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skip_bits(&gb, 2); // enable_jnt_comp (1), enable_ref_frame_mvs (1)
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if (get_bits1(&gb)) // seq_choose_screen_content_tools
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seq_force_screen_content_tools = 2;
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else
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seq_force_screen_content_tools = get_bits1(&gb);
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if (seq_force_screen_content_tools) {
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if (!get_bits1(&gb)) // seq_choose_integer_mv
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skip_bits1(&gb); // seq_force_integer_mv
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}
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if (enable_order_hint)
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skip_bits(&gb, 3); // order_hint_bits_minus_1
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}
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skip_bits(&gb, 3); // enable_superres (1), enable_cdef (1), enable_restoration (1)
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parse_color_config(seq_params, &gb);
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skip_bits1(&gb); // film_grain_params_present
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if (get_bits_left(&gb))
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return AVERROR_INVALIDDATA;
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return 0;
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}
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int ff_isom_write_av1c(AVIOContext *pb, const uint8_t *buf, int size)
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{
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AVIOContext *seq_pb = NULL, *meta_pb = NULL;
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AV1SequenceParameters seq_params;
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PutBitContext pbc;
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uint8_t header[4];
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uint8_t *seq = NULL, *meta = NULL;
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int64_t obu_size;
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int start_pos, type, temporal_id, spatial_id;
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@ -106,6 +332,10 @@ int ff_isom_write_av1c(AVIOContext *pb, const uint8_t *buf, int size)
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ret = AVERROR_INVALIDDATA;
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goto fail;
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}
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ret = parse_sequence_header(&seq_params, buf + start_pos, obu_size);
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if (ret < 0)
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goto fail;
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avio_write(seq_pb, buf, len);
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break;
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case AV1_OBU_METADATA:
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@ -127,6 +357,23 @@ int ff_isom_write_av1c(AVIOContext *pb, const uint8_t *buf, int size)
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ret = AVERROR_INVALIDDATA;
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goto fail;
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}
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init_put_bits(&pbc, header, sizeof(header));
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put_bits(&pbc, 1, 1); // marker
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put_bits(&pbc, 7, 1); // version
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put_bits(&pbc, 3, seq_params.seq_profile);
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put_bits(&pbc, 5, seq_params.seq_level_idx_0);
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put_bits(&pbc, 1, seq_params.seq_tier_0);
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put_bits(&pbc, 1, seq_params.high_bitdepth);
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put_bits(&pbc, 1, seq_params.twelve_bit);
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put_bits(&pbc, 1, seq_params.monochrome);
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put_bits(&pbc, 1, seq_params.chroma_subsampling_x);
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put_bits(&pbc, 1, seq_params.chroma_subsampling_y);
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put_bits(&pbc, 2, seq_params.chroma_sample_position);
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flush_put_bits(&pbc);
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avio_write(pb, header, sizeof(header));
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avio_write(pb, seq, seq_size);
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meta_size = avio_close_dyn_buf(meta_pb, &meta);
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@ -2421,6 +2421,10 @@ static int matroska_parse_tracks(AVFormatContext *s)
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/* we don't need any value stored in CodecPrivate.
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make sure that it's not exported as extradata. */
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track->codec_priv.size = 0;
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} else if (codec_id == AV_CODEC_ID_AV1 && track->codec_priv.size) {
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/* For now, propagate only the OBUs, if any. Once libavcodec is
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updated to handle isobmff style extradata this can be removed. */
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extradata_offset = 4;
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}
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track->codec_priv.size -= extradata_offset;
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@ -5190,27 +5190,25 @@ static int mov_read_tmcd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
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static int mov_read_av1c(MOVContext *c, AVIOContext *pb, MOVAtom atom)
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{
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AVStream *st;
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int ret, version;
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int ret;
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if (c->fc->nb_streams < 1)
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return 0;
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st = c->fc->streams[c->fc->nb_streams - 1];
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if (atom.size < 5) {
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if (atom.size < 4) {
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av_log(c->fc, AV_LOG_ERROR, "Empty AV1 Codec Configuration Box\n");
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return AVERROR_INVALIDDATA;
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}
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version = avio_r8(pb);
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if (version != 0) {
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av_log(c->fc, AV_LOG_WARNING, "Unknown AV1 Codec Configuration Box version %d\n", version);
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/* For now, propagate only the OBUs, if any. Once libavcodec is
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updated to handle isobmff style extradata this can be removed. */
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avio_skip(pb, 4);
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if (atom.size == 4)
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return 0;
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}
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avio_skip(pb, 3); /* flags */
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avio_skip(pb, 1); /* reserved, initial_presentation_delay_present, initial_presentation_delay_minus_one */
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ret = ff_get_extradata(c->fc, st->codecpar, pb, atom.size - 5);
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ret = ff_get_extradata(c->fc, st->codecpar, pb, atom.size - 4);
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if (ret < 0)
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return ret;
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@ -1170,9 +1170,6 @@ static int mov_write_av1c_tag(AVIOContext *pb, MOVTrack *track)
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avio_wb32(pb, 0);
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ffio_wfourcc(pb, "av1C");
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avio_w8(pb, 0); /* version */
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avio_wb24(pb, 0); /* flags */
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avio_w8(pb, 0); /* reserved (3), initial_presentation_delay_present (1), initial_presentation_delay_minus_one/reserved (4) */
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ff_isom_write_av1c(pb, track->vos_data, track->vos_len);
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return update_size(pb, pos);
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}
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