[FFmpeg-devel] [PATCH 04/20] lavc: Add coded bitstream read/write support for H.264
Mark Thompson
sw at jkqxz.net
Wed Sep 13 02:43:54 EEST 2017
(cherry picked from commit acf06f45441be24c5cbae0920579cd69427326a1)
(cherry picked from commit 768eb9182e94a94bc2ef46f565a0dac7afef3b57)
(cherry picked from commit e7f64191b27bcf37cbf7006606f0f439c6cdc24f)
---
configure | 2 +
libavcodec/Makefile | 1 +
libavcodec/cbs.c | 3 +
libavcodec/cbs_h264.h | 427 ++++++++++++
libavcodec/cbs_h2645.c | 1010 +++++++++++++++++++++++++++
libavcodec/cbs_h2645.h | 43 ++
libavcodec/cbs_h264_syntax_template.c | 1230 +++++++++++++++++++++++++++++++++
libavcodec/cbs_internal.h | 3 +
8 files changed, 2719 insertions(+)
create mode 100644 libavcodec/cbs_h264.h
create mode 100644 libavcodec/cbs_h2645.c
create mode 100644 libavcodec/cbs_h2645.h
create mode 100644 libavcodec/cbs_h264_syntax_template.c
diff --git a/configure b/configure
index 2e84b1f892..10311d9b32 100755
--- a/configure
+++ b/configure
@@ -2113,6 +2113,7 @@ CONFIG_EXTRA="
bswapdsp
cabac
cbs
+ cbs_h264
dirac_parse
dvprofile
exif
@@ -2364,6 +2365,7 @@ w32threads_deps="atomics_native"
threads_if_any="$THREADS_LIST"
# subsystems
+cbs_h264_select="cbs golomb"
dct_select="rdft"
dirac_parse_select="golomb"
error_resilience_select="me_cmp"
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index d9612d68d0..6d01f27ff6 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -60,6 +60,7 @@ OBJS-$(CONFIG_BLOCKDSP) += blockdsp.o
OBJS-$(CONFIG_BSWAPDSP) += bswapdsp.o
OBJS-$(CONFIG_CABAC) += cabac.o
OBJS-$(CONFIG_CBS) += cbs.o
+OBJS-$(CONFIG_CBS_H264) += cbs_h2645.o h2645_parse.o
OBJS-$(CONFIG_CRYSTALHD) += crystalhd.o
OBJS-$(CONFIG_DCT) += dct.o dct32_fixed.o dct32_float.o
OBJS-$(CONFIG_ERROR_RESILIENCE) += error_resilience.o
diff --git a/libavcodec/cbs.c b/libavcodec/cbs.c
index 13bc25728f..b36fbb46c6 100644
--- a/libavcodec/cbs.c
+++ b/libavcodec/cbs.c
@@ -28,6 +28,9 @@
static const CodedBitstreamType *cbs_type_table[] = {
+#if CONFIG_CBS_H264
+ &ff_cbs_type_h264,
+#endif
};
int ff_cbs_init(CodedBitstreamContext *ctx,
diff --git a/libavcodec/cbs_h264.h b/libavcodec/cbs_h264.h
new file mode 100644
index 0000000000..ab7dfd855f
--- /dev/null
+++ b/libavcodec/cbs_h264.h
@@ -0,0 +1,427 @@
+/*
+ * 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
+ */
+
+#ifndef AVCODEC_CBS_H264_H
+#define AVCODEC_CBS_H264_H
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include "cbs_h2645.h"
+#include "h264.h"
+
+
+enum {
+ // This limit is arbitrary - it is sufficient for one message of each
+ // type plus some repeats, and will therefore easily cover all sane
+ // streams. However, it is possible to make technically-valid streams
+ // for which it will fail (for example, by including a large number of
+ // user-data-unregistered messages).
+ H264_MAX_SEI_PAYLOADS = 64,
+};
+
+
+typedef struct H264RawNALUnitHeader {
+ uint8_t forbidden_zero_bit;
+ uint8_t nal_ref_idc;
+ uint8_t nal_unit_type;
+
+ uint8_t svc_extension_flag;
+ uint8_t avc_3d_extension_flag;
+} H264RawNALUnitHeader;
+
+typedef struct H264RawScalingList {
+ int8_t delta_scale[64];
+} H264RawScalingList;
+
+typedef struct H264RawHRD {
+ uint8_t cpb_cnt_minus1;
+ uint8_t bit_rate_scale;
+ uint8_t cpb_size_scale;
+
+ uint32_t bit_rate_value_minus1[H264_MAX_CPB_CNT];
+ uint32_t cpb_size_value_minus1[H264_MAX_CPB_CNT];
+ uint8_t cbr_flag[H264_MAX_CPB_CNT];
+
+ uint8_t initial_cpb_removal_delay_length_minus1;
+ uint8_t cpb_removal_delay_length_minus1;
+ uint8_t dpb_output_delay_length_minus1;
+ uint8_t time_offset_length;
+} H264RawHRD;
+
+typedef struct H264RawVUI {
+ uint8_t aspect_ratio_info_present_flag;
+ uint8_t aspect_ratio_idc;
+ uint16_t sar_width;
+ uint16_t sar_height;
+
+ uint8_t overscan_info_present_flag;
+ uint8_t overscan_appropriate_flag;
+
+ uint8_t video_signal_type_present_flag;
+ uint8_t video_format;
+ uint8_t video_full_range_flag;
+ uint8_t colour_description_present_flag;
+ uint8_t colour_primaries;
+ uint8_t transfer_characteristics;
+ uint8_t matrix_coefficients;
+
+ uint8_t chroma_loc_info_present_flag;
+ uint8_t chroma_sample_loc_type_top_field;
+ uint8_t chroma_sample_loc_type_bottom_field;
+
+ uint8_t timing_info_present_flag;
+ uint32_t num_units_in_tick;
+ uint32_t time_scale;
+ uint8_t fixed_frame_rate_flag;
+
+ uint8_t nal_hrd_parameters_present_flag;
+ H264RawHRD nal_hrd_parameters;
+ uint8_t vcl_hrd_parameters_present_flag;
+ H264RawHRD vcl_hrd_parameters;
+ uint8_t low_delay_hrd_flag;
+
+ uint8_t pic_struct_present_flag;
+
+ uint8_t bitstream_restriction_flag;
+ uint8_t motion_vectors_over_pic_boundaries_flag;
+ uint8_t max_bytes_per_pic_denom;
+ uint8_t max_bits_per_mb_denom;
+ uint8_t log2_max_mv_length_horizontal;
+ uint8_t log2_max_mv_length_vertical;
+ uint8_t max_num_reorder_frames;
+ uint8_t max_dec_frame_buffering;
+} H264RawVUI;
+
+typedef struct H264RawSPS {
+ H264RawNALUnitHeader nal_unit_header;
+
+ uint8_t profile_idc;
+ uint8_t constraint_set0_flag;
+ uint8_t constraint_set1_flag;
+ uint8_t constraint_set2_flag;
+ uint8_t constraint_set3_flag;
+ uint8_t constraint_set4_flag;
+ uint8_t constraint_set5_flag;
+ uint8_t reserved_zero_2bits;
+ uint8_t level_idc;
+
+ uint8_t seq_parameter_set_id;
+
+ uint8_t chroma_format_idc;
+ uint8_t separate_colour_plane_flag;
+ uint8_t bit_depth_luma_minus8;
+ uint8_t bit_depth_chroma_minus8;
+ uint8_t qpprime_y_zero_transform_bypass_flag;
+
+ uint8_t seq_scaling_matrix_present_flag;
+ uint8_t seq_scaling_list_present_flag[12];
+ H264RawScalingList scaling_list_4x4[6];
+ H264RawScalingList scaling_list_8x8[6];
+
+ uint8_t log2_max_frame_num_minus4;
+ uint8_t pic_order_cnt_type;
+ uint8_t log2_max_pic_order_cnt_lsb_minus4;
+ uint8_t delta_pic_order_always_zero_flag;
+ int32_t offset_for_non_ref_pic;
+ int32_t offset_for_top_to_bottom_field;
+ uint8_t num_ref_frames_in_pic_order_cnt_cycle;
+ int32_t offset_for_ref_frame[256];
+
+ uint8_t max_num_ref_frames;
+ uint8_t gaps_in_frame_num_allowed_flag;
+
+ uint16_t pic_width_in_mbs_minus1;
+ uint16_t pic_height_in_map_units_minus1;
+
+ uint8_t frame_mbs_only_flag;
+ uint8_t mb_adaptive_frame_field_flag;
+ uint8_t direct_8x8_inference_flag;
+
+ uint8_t frame_cropping_flag;
+ uint16_t frame_crop_left_offset;
+ uint16_t frame_crop_right_offset;
+ uint16_t frame_crop_top_offset;
+ uint16_t frame_crop_bottom_offset;
+
+ uint8_t vui_parameters_present_flag;
+ H264RawVUI vui;
+} H264RawSPS;
+
+typedef struct H264RawSPSExtension {
+ H264RawNALUnitHeader nal_unit_header;
+
+ uint8_t seq_parameter_set_id;
+
+ uint8_t aux_format_idc;
+ uint8_t bit_depth_aux_minus8;
+ uint8_t alpha_incr_flag;
+ uint16_t alpha_opaque_value;
+ uint16_t alpha_transparent_value;
+
+ uint8_t additional_extension_flag;
+} H264RawSPSExtension;
+
+typedef struct H264RawPPS {
+ H264RawNALUnitHeader nal_unit_header;
+
+ uint8_t pic_parameter_set_id;
+ uint8_t seq_parameter_set_id;
+
+ uint8_t entropy_coding_mode_flag;
+ uint8_t bottom_field_pic_order_in_frame_present_flag;
+
+ uint8_t num_slice_groups_minus1;
+ uint8_t slice_group_map_type;
+ uint16_t run_length_minus1[H264_MAX_SLICE_GROUPS];
+ uint16_t top_left[H264_MAX_SLICE_GROUPS];
+ uint16_t bottom_right[H264_MAX_SLICE_GROUPS];
+ uint8_t slice_group_change_direction_flag;
+ uint16_t slice_group_change_rate_minus1;
+ uint16_t pic_size_in_map_units_minus1;
+ uint8_t slice_group_id[H264_MAX_MB_PIC_SIZE];
+
+ uint8_t num_ref_idx_l0_default_active_minus1;
+ uint8_t num_ref_idx_l1_default_active_minus1;
+
+ uint8_t weighted_pred_flag;
+ uint8_t weighted_bipred_idc;
+
+ int8_t pic_init_qp_minus26;
+ int8_t pic_init_qs_minus26;
+ int8_t chroma_qp_index_offset;
+
+ uint8_t deblocking_filter_control_present_flag;
+ uint8_t constrained_intra_pred_flag;
+
+ uint8_t more_rbsp_data;
+
+ uint8_t redundant_pic_cnt_present_flag;
+ uint8_t transform_8x8_mode_flag;
+
+ uint8_t pic_scaling_matrix_present_flag;
+ uint8_t pic_scaling_list_present_flag[12];
+ H264RawScalingList scaling_list_4x4[6];
+ H264RawScalingList scaling_list_8x8[6];
+
+ int8_t second_chroma_qp_index_offset;
+} H264RawPPS;
+
+typedef struct H264RawAUD {
+ H264RawNALUnitHeader nal_unit_header;
+
+ uint8_t primary_pic_type;
+} H264RawAUD;
+
+typedef struct H264RawSEIBufferingPeriod {
+ uint8_t seq_parameter_set_id;
+ struct {
+ uint32_t initial_cpb_removal_delay[H264_MAX_CPB_CNT];
+ uint32_t initial_cpb_removal_delay_offset[H264_MAX_CPB_CNT];
+ } nal, vcl;
+} H264RawSEIBufferingPeriod;
+
+typedef struct H264RawSEIPicTimestamp {
+ uint8_t ct_type;
+ uint8_t nuit_field_based_flag;
+ uint8_t counting_type;
+ uint8_t full_timestamp_flag;
+ uint8_t discontinuity_flag;
+ uint8_t cnt_dropped_flag;
+ uint8_t n_frames;
+ uint8_t seconds_flag;
+ uint8_t seconds_value;
+ uint8_t minutes_flag;
+ uint8_t minutes_value;
+ uint8_t hours_flag;
+ uint8_t hours_value;
+ uint32_t time_offset;
+} H264RawSEIPicTimestamp;
+
+typedef struct H264RawSEIPicTiming {
+ uint32_t cpb_removal_delay;
+ uint32_t dpb_output_delay;
+ uint8_t pic_struct;
+ uint8_t clock_timestamp_flag[3];
+ H264RawSEIPicTimestamp timestamp[3];
+} H264RawSEIPicTiming;
+
+typedef struct H264RawSEIUserDataRegistered {
+ uint8_t itu_t_t35_country_code;
+ uint8_t itu_t_t35_country_code_extension_byte;
+ uint8_t *data;
+ size_t data_length;
+} H264RawSEIUserDataRegistered;
+
+typedef struct H264RawSEIUserDataUnregistered {
+ uint8_t uuid_iso_iec_11578[16];
+ uint8_t *data;
+ size_t data_length;
+} H264RawSEIUserDataUnregistered;
+
+typedef struct H264RawSEIRecoveryPoint {
+ uint16_t recovery_frame_cnt;
+ uint8_t exact_match_flag;
+ uint8_t broken_link_flag;
+ uint8_t changing_slice_group_idc;
+} H264RawSEIRecoveryPoint;
+
+typedef struct H264RawSEIDisplayOrientation {
+ uint8_t display_orientation_cancel_flag;
+ uint8_t hor_flip;
+ uint8_t ver_flip;
+ uint16_t anticlockwise_rotation;
+ uint16_t display_orientation_repetition_period;
+ uint8_t display_orientation_extension_flag;
+} H264RawSEIDisplayOrientation;
+
+typedef struct H264RawSEIPayload {
+ uint32_t payload_type;
+ uint32_t payload_size;
+ union {
+ H264RawSEIBufferingPeriod buffering_period;
+ H264RawSEIPicTiming pic_timing;
+ // H264RawSEIFiller filler -> no fields.
+ H264RawSEIUserDataRegistered user_data_registered;
+ H264RawSEIUserDataUnregistered user_data_unregistered;
+ H264RawSEIRecoveryPoint recovery_point;
+ H264RawSEIDisplayOrientation display_orientation;
+ struct {
+ uint8_t *data;
+ size_t data_length;
+ } other;
+ } payload;
+} H264RawSEIPayload;
+
+typedef struct H264RawSEI {
+ H264RawNALUnitHeader nal_unit_header;
+
+ H264RawSEIPayload payload[H264_MAX_SEI_PAYLOADS];
+ uint8_t payload_count;
+} H264RawSEI;
+
+typedef struct H264RawSliceHeader {
+ H264RawNALUnitHeader nal_unit_header;
+
+ uint32_t first_mb_in_slice;
+ uint8_t slice_type;
+
+ uint8_t pic_parameter_set_id;
+
+ uint8_t colour_plane_id;
+
+ uint16_t frame_num;
+ uint8_t field_pic_flag;
+ uint8_t bottom_field_flag;
+
+ uint16_t idr_pic_id;
+
+ uint16_t pic_order_cnt_lsb;
+ int32_t delta_pic_order_cnt_bottom;
+ int32_t delta_pic_order_cnt[2];
+
+ uint8_t redundant_pic_cnt;
+ uint8_t direct_spatial_mv_pred_flag;
+
+ uint8_t num_ref_idx_active_override_flag;
+ uint8_t num_ref_idx_l0_active_minus1;
+ uint8_t num_ref_idx_l1_active_minus1;
+
+ uint8_t ref_pic_list_modification_flag_l0;
+ uint8_t ref_pic_list_modification_flag_l1;
+ struct {
+ uint8_t modification_of_pic_nums_idc;
+ int32_t abs_diff_pic_num_minus1;
+ uint8_t long_term_pic_num;
+ } rplm_l0[H264_MAX_RPLM_COUNT], rplm_l1[H264_MAX_RPLM_COUNT];
+
+ uint8_t luma_log2_weight_denom;
+ uint8_t chroma_log2_weight_denom;
+
+ uint8_t luma_weight_l0_flag[H264_MAX_REFS];
+ int8_t luma_weight_l0[H264_MAX_REFS];
+ int8_t luma_offset_l0[H264_MAX_REFS];
+ uint8_t chroma_weight_l0_flag[H264_MAX_REFS];
+ int8_t chroma_weight_l0[H264_MAX_REFS][2];
+ int8_t chroma_offset_l0[H264_MAX_REFS][2];
+
+ uint8_t luma_weight_l1_flag[H264_MAX_REFS];
+ int8_t luma_weight_l1[H264_MAX_REFS];
+ int8_t luma_offset_l1[H264_MAX_REFS];
+ uint8_t chroma_weight_l1_flag[H264_MAX_REFS];
+ int8_t chroma_weight_l1[H264_MAX_REFS][2];
+ int8_t chroma_offset_l1[H264_MAX_REFS][2];
+
+ uint8_t no_output_of_prior_pics_flag;
+ uint8_t long_term_reference_flag;
+
+ uint8_t adaptive_ref_pic_marking_mode_flag;
+ struct {
+ uint8_t memory_management_control_operation;
+ int32_t difference_of_pic_nums_minus1;
+ uint8_t long_term_pic_num;
+ uint8_t long_term_frame_idx;
+ uint8_t max_long_term_frame_idx_plus1;
+ } mmco[H264_MAX_MMCO_COUNT];
+
+ uint8_t cabac_init_idc;
+
+ int8_t slice_qp_delta;
+
+ uint8_t sp_for_switch_flag;
+ int8_t slice_qs_delta;
+
+ uint8_t disable_deblocking_filter_idc;
+ int8_t slice_alpha_c0_offset_div2;
+ int8_t slice_beta_offset_div2;
+
+ uint16_t slice_group_change_cycle;
+} H264RawSliceHeader;
+
+typedef struct H264RawSlice {
+ H264RawSliceHeader header;
+
+ uint8_t *data;
+ size_t data_size;
+ int data_bit_start;
+} H264RawSlice;
+
+
+typedef struct CodedBitstreamH264Context {
+ // Reader/writer context in common with the H.265 implementation.
+ CodedBitstreamH2645Context common;
+
+ // All currently available parameter sets. These are updated when
+ // any parameter set NAL unit is read/written with this context.
+ H264RawSPS *sps[H264_MAX_SPS_COUNT];
+ H264RawPPS *pps[H264_MAX_PPS_COUNT];
+
+ // The currently active parameter sets. These are updated when any
+ // NAL unit refers to the relevant parameter set. These pointers
+ // must also be present in the arrays above.
+ const H264RawSPS *active_sps;
+ const H264RawPPS *active_pps;
+
+ // The NAL unit type of the most recent normal slice. This is required
+ // to be able to read/write auxiliary slices, because IdrPicFlag is
+ // otherwise unknown.
+ uint8_t last_slice_nal_unit_type;
+} CodedBitstreamH264Context;
+
+
+#endif /* AVCODEC_CBS_H264_H */
diff --git a/libavcodec/cbs_h2645.c b/libavcodec/cbs_h2645.c
new file mode 100644
index 0000000000..f03fd3ce72
--- /dev/null
+++ b/libavcodec/cbs_h2645.c
@@ -0,0 +1,1010 @@
+/*
+ * 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 "libavutil/attributes.h"
+#include "libavutil/avassert.h"
+
+#include "bytestream.h"
+#include "cbs.h"
+#include "cbs_internal.h"
+#include "cbs_h264.h"
+#include "golomb.h"
+#include "h264.h"
+#include "h264_sei.h"
+#include "h2645_parse.h"
+
+
+static int cbs_read_ue_golomb(CodedBitstreamContext *ctx, GetBitContext *gbc,
+ const char *name, uint32_t *write_to,
+ uint32_t range_min, uint32_t range_max)
+{
+ uint32_t value;
+ int position, i, j;
+ unsigned int k;
+ char bits[65];
+
+ position = get_bits_count(gbc);
+
+ for (i = 0; i < 32; i++) {
+ if (get_bits_left(gbc) < i + 1) {
+ av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid ue-golomb code at "
+ "%s: bitstream ended.\n", name);
+ return AVERROR_INVALIDDATA;
+ }
+ k = get_bits1(gbc);
+ bits[i] = k ? '1' : '0';
+ if (k)
+ break;
+ }
+ if (i >= 32) {
+ av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid ue-golomb code at "
+ "%s: more than 31 zeroes.\n", name);
+ return AVERROR_INVALIDDATA;
+ }
+ value = 1;
+ for (j = 0; j < i; j++) {
+ k = get_bits1(gbc);
+ bits[i + j + 1] = k ? '1' : '0';
+ value = value << 1 | k;
+ }
+ bits[i + j + 1] = 0;
+ --value;
+
+ if (ctx->trace_enable)
+ ff_cbs_trace_syntax_element(ctx, position, name, bits, value);
+
+ if (value < range_min || value > range_max) {
+ av_log(ctx->log_ctx, AV_LOG_ERROR, "%s out of range: "
+ "%"PRIu32", but must be in [%"PRIu32",%"PRIu32"].\n",
+ name, value, range_min, range_max);
+ return AVERROR_INVALIDDATA;
+ }
+
+ *write_to = value;
+ return 0;
+}
+
+static int cbs_read_se_golomb(CodedBitstreamContext *ctx, GetBitContext *gbc,
+ const char *name, int32_t *write_to,
+ int32_t range_min, int32_t range_max)
+{
+ int32_t value;
+ int position, i, j;
+ unsigned int k;
+ uint32_t v;
+ char bits[65];
+
+ position = get_bits_count(gbc);
+
+ for (i = 0; i < 32; i++) {
+ if (get_bits_left(gbc) < i + 1) {
+ av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid se-golomb code at "
+ "%s: bitstream ended.\n", name);
+ return AVERROR_INVALIDDATA;
+ }
+ k = get_bits1(gbc);
+ bits[i] = k ? '1' : '0';
+ if (k)
+ break;
+ }
+ if (i >= 32) {
+ av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid se-golomb code at "
+ "%s: more than 31 zeroes.\n", name);
+ return AVERROR_INVALIDDATA;
+ }
+ v = 1;
+ for (j = 0; j < i; j++) {
+ k = get_bits1(gbc);
+ bits[i + j + 1] = k ? '1' : '0';
+ v = v << 1 | k;
+ }
+ bits[i + j + 1] = 0;
+ if (v & 1)
+ value = -(int32_t)(v / 2);
+ else
+ value = v / 2;
+
+ if (ctx->trace_enable)
+ ff_cbs_trace_syntax_element(ctx, position, name, bits, value);
+
+ if (value < range_min || value > range_max) {
+ av_log(ctx->log_ctx, AV_LOG_ERROR, "%s out of range: "
+ "%"PRId32", but must be in [%"PRId32",%"PRId32"].\n",
+ name, value, range_min, range_max);
+ return AVERROR_INVALIDDATA;
+ }
+
+ *write_to = value;
+ return 0;
+}
+
+static int cbs_write_ue_golomb(CodedBitstreamContext *ctx, PutBitContext *pbc,
+ const char *name, uint32_t value,
+ uint32_t range_min, uint32_t range_max)
+{
+ int len;
+
+ if (value < range_min || value > range_max) {
+ av_log(ctx->log_ctx, AV_LOG_ERROR, "%s out of range: "
+ "%"PRIu32", but must be in [%"PRIu32",%"PRIu32"].\n",
+ name, value, range_min, range_max);
+ return AVERROR_INVALIDDATA;
+ }
+ av_assert0(value != UINT32_MAX);
+
+ len = av_log2(value + 1);
+ if (put_bits_left(pbc) < 2 * len + 1)
+ return AVERROR(ENOSPC);
+
+ if (ctx->trace_enable) {
+ char bits[65];
+ int i;
+
+ for (i = 0; i < len; i++)
+ bits[i] = '0';
+ bits[len] = '1';
+ for (i = 0; i < len; i++)
+ bits[len + i + 1] = (value + 1) >> (len - i - 1) & 1 ? '1' : '0';
+ bits[len + len + 1] = 0;
+
+ ff_cbs_trace_syntax_element(ctx, put_bits_count(pbc), name, bits, value);
+ }
+
+ put_bits(pbc, len, 0);
+ if (len + 1 < 32)
+ put_bits(pbc, len + 1, value + 1);
+ else
+ put_bits32(pbc, value + 1);
+
+ return 0;
+}
+
+static int cbs_write_se_golomb(CodedBitstreamContext *ctx, PutBitContext *pbc,
+ const char *name, int32_t value,
+ int32_t range_min, int32_t range_max)
+{
+ int len;
+ uint32_t uvalue;
+
+ if (value < range_min || value > range_max) {
+ av_log(ctx->log_ctx, AV_LOG_ERROR, "%s out of range: "
+ "%"PRId32", but must be in [%"PRId32",%"PRId32"].\n",
+ name, value, range_min, range_max);
+ return AVERROR_INVALIDDATA;
+ }
+ av_assert0(value != INT32_MIN);
+
+ if (value == 0)
+ uvalue = 0;
+ else if (value > 0)
+ uvalue = 2 * (uint32_t)value - 1;
+ else
+ uvalue = 2 * (uint32_t)-value;
+
+ len = av_log2(uvalue + 1);
+ if (put_bits_left(pbc) < 2 * len + 1)
+ return AVERROR(ENOSPC);
+
+ if (ctx->trace_enable) {
+ char bits[65];
+ int i;
+
+ for (i = 0; i < len; i++)
+ bits[i] = '0';
+ bits[len] = '1';
+ for (i = 0; i < len; i++)
+ bits[len + i + 1] = (uvalue + 1) >> (len - i - 1) & 1 ? '1' : '0';
+ bits[len + len + 1] = 0;
+
+ ff_cbs_trace_syntax_element(ctx, put_bits_count(pbc), name, bits, value);
+ }
+
+ put_bits(pbc, len, 0);
+ if (len + 1 < 32)
+ put_bits(pbc, len + 1, uvalue + 1);
+ else
+ put_bits32(pbc, uvalue + 1);
+
+ return 0;
+}
+
+#define HEADER(name) do { \
+ ff_cbs_trace_header(ctx, name); \
+ } while (0)
+
+#define CHECK(call) do { \
+ err = (call); \
+ if (err < 0) \
+ return err; \
+ } while (0)
+
+#define FUNC_NAME(rw, codec, name) cbs_ ## codec ## _ ## rw ## _ ## name
+#define FUNC_H264(rw, name) FUNC_NAME(rw, h264, name)
+
+
+#define READ
+#define READWRITE read
+#define RWContext GetBitContext
+
+#define xu(width, name, var, range_min, range_max) do { \
+ uint32_t value = range_min; \
+ CHECK(ff_cbs_read_unsigned(ctx, rw, width, #name, \
+ &value, range_min, range_max)); \
+ var = value; \
+ } while (0)
+#define xue(name, var, range_min, range_max) do { \
+ uint32_t value = range_min; \
+ CHECK(cbs_read_ue_golomb(ctx, rw, #name, \
+ &value, range_min, range_max)); \
+ var = value; \
+ } while (0)
+#define xse(name, var, range_min, range_max) do { \
+ int32_t value = range_min; \
+ CHECK(cbs_read_se_golomb(ctx, rw, #name, \
+ &value, range_min, range_max)); \
+ var = value; \
+ } while (0)
+
+
+#define u(width, name, range_min, range_max) \
+ xu(width, name, current->name, range_min, range_max)
+#define flag(name) u(1, name, 0, 1)
+#define ue(name, range_min, range_max) \
+ xue(name, current->name, range_min, range_max)
+#define se(name, range_min, range_max) \
+ xse(name, current->name, range_min, range_max)
+
+#define infer(name, value) do { \
+ current->name = value; \
+ } while (0)
+
+static int cbs_h2645_read_more_rbsp_data(GetBitContext *gbc)
+{
+ int bits_left = get_bits_left(gbc);
+ if (bits_left > 8)
+ return 1;
+ if (show_bits(gbc, bits_left) == 1 << (bits_left - 1))
+ return 0;
+ return 1;
+}
+
+#define more_rbsp_data(var) ((var) = cbs_h2645_read_more_rbsp_data(rw))
+
+#define byte_alignment(rw) (get_bits_count(rw) % 8)
+
+#define allocate(name, size) do { \
+ name = av_mallocz(size); \
+ if (!name) \
+ return AVERROR(ENOMEM); \
+ } while (0)
+
+#define FUNC(name) FUNC_H264(READWRITE, name)
+#include "cbs_h264_syntax_template.c"
+#undef FUNC
+
+#undef READ
+#undef READWRITE
+#undef RWContext
+#undef xu
+#undef xue
+#undef xse
+#undef u
+#undef flag
+#undef ue
+#undef se
+#undef infer
+#undef more_rbsp_data
+#undef byte_alignment
+#undef allocate
+
+
+#define WRITE
+#define READWRITE write
+#define RWContext PutBitContext
+
+#define xu(width, name, var, range_min, range_max) do { \
+ uint32_t value = var; \
+ CHECK(ff_cbs_write_unsigned(ctx, rw, width, #name, \
+ value, range_min, range_max)); \
+ } while (0)
+#define xue(name, var, range_min, range_max) do { \
+ uint32_t value = var; \
+ CHECK(cbs_write_ue_golomb(ctx, rw, #name, \
+ value, range_min, range_max)); \
+ } while (0)
+#define xse(name, var, range_min, range_max) do { \
+ int32_t value = var; \
+ CHECK(cbs_write_se_golomb(ctx, rw, #name, \
+ value, range_min, range_max)); \
+ } while (0)
+
+#define u(width, name, range_min, range_max) \
+ xu(width, name, current->name, range_min, range_max)
+#define flag(name) u(1, name, 0, 1)
+#define ue(name, range_min, range_max) \
+ xue(name, current->name, range_min, range_max)
+#define se(name, range_min, range_max) \
+ xse(name, current->name, range_min, range_max)
+
+#define infer(name, value) do { \
+ if (current->name != (value)) { \
+ av_log(ctx->log_ctx, AV_LOG_WARNING, "Warning: " \
+ "%s does not match inferred value: " \
+ "%"PRId64", but should be %"PRId64".\n", \
+ #name, (int64_t)current->name, (int64_t)(value)); \
+ } \
+ } while (0)
+
+#define more_rbsp_data(var) (var)
+
+#define byte_alignment(rw) (put_bits_count(rw) % 8)
+
+#define allocate(name, size) do { \
+ if (!name) { \
+ av_log(ctx->log_ctx, AV_LOG_ERROR, "%s must be set " \
+ "for writing.\n", #name); \
+ return AVERROR_INVALIDDATA; \
+ } \
+ } while (0)
+
+#define FUNC(name) FUNC_H264(READWRITE, name)
+#include "cbs_h264_syntax_template.c"
+#undef FUNC
+
+#undef WRITE
+#undef READWRITE
+#undef RWContext
+#undef xu
+#undef xue
+#undef xse
+#undef u
+#undef flag
+#undef ue
+#undef se
+#undef infer
+#undef more_rbsp_data
+#undef byte_alignment
+#undef allocate
+
+
+static void cbs_h264_free_sei(H264RawSEI *sei)
+{
+ int i;
+ for (i = 0; i < sei->payload_count; i++) {
+ H264RawSEIPayload *payload = &sei->payload[i];
+
+ switch (payload->payload_type) {
+ case H264_SEI_TYPE_BUFFERING_PERIOD:
+ case H264_SEI_TYPE_PIC_TIMING:
+ case H264_SEI_TYPE_RECOVERY_POINT:
+ case H264_SEI_TYPE_DISPLAY_ORIENTATION:
+ break;
+ case H264_SEI_TYPE_USER_DATA_REGISTERED:
+ av_freep(&payload->payload.user_data_registered.data);
+ break;
+ case H264_SEI_TYPE_USER_DATA_UNREGISTERED:
+ av_freep(&payload->payload.user_data_unregistered.data);
+ break;
+ default:
+ av_freep(&payload->payload.other.data);
+ break;
+ }
+ }
+}
+
+static void cbs_h264_free_slice(H264RawSlice *slice)
+{
+ av_freep(&slice->data);
+}
+
+static void cbs_h264_free_nal_unit(CodedBitstreamUnit *unit)
+{
+ switch (unit->type) {
+ case H264_NAL_SEI:
+ cbs_h264_free_sei(unit->content);
+ break;
+ case H264_NAL_IDR_SLICE:
+ case H264_NAL_SLICE:
+ cbs_h264_free_slice(unit->content);
+ break;
+ }
+ av_freep(&unit->content);
+}
+
+static int cbs_h2645_fragment_add_nals(CodedBitstreamContext *ctx,
+ CodedBitstreamFragment *frag,
+ const H2645Packet *packet)
+{
+ int err, i;
+
+ for (i = 0; i < packet->nb_nals; i++) {
+ const H2645NAL *nal = &packet->nals[i];
+ size_t size = nal->size;
+ uint8_t *data;
+
+ // Remove trailing zeroes.
+ while (size > 0 && nal->data[size - 1] == 0)
+ --size;
+ av_assert0(size > 0);
+
+ data = av_malloc(size + AV_INPUT_BUFFER_PADDING_SIZE);
+ if (!data)
+ return AVERROR(ENOMEM);
+ memcpy(data, nal->data, size);
+ memset(data + size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
+
+ err = ff_cbs_insert_unit_data(ctx, frag, -1, nal->type,
+ data, size);
+ if (err < 0) {
+ av_freep(&data);
+ return err;
+ }
+ }
+
+ return 0;
+}
+
+static int cbs_h2645_split_fragment(CodedBitstreamContext *ctx,
+ CodedBitstreamFragment *frag,
+ int header)
+{
+ enum AVCodecID codec_id = ctx->codec->codec_id;
+ CodedBitstreamH2645Context *priv = ctx->priv_data;
+ GetByteContext gbc;
+ int err;
+
+ av_assert0(frag->data && frag->nb_units == 0);
+ if (frag->data_size == 0)
+ return 0;
+
+ if (header && frag->data[0] && codec_id == AV_CODEC_ID_H264) {
+ // AVCC header.
+ size_t size, start, end;
+ int i, count, version;
+
+ priv->mp4 = 1;
+
+ bytestream2_init(&gbc, frag->data, frag->data_size);
+
+ if (bytestream2_get_bytes_left(&gbc) < 6)
+ return AVERROR_INVALIDDATA;
+
+ version = bytestream2_get_byte(&gbc);
+ if (version != 1) {
+ av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid AVCC header: "
+ "first byte %u.", version);
+ return AVERROR_INVALIDDATA;
+ }
+
+ bytestream2_skip(&gbc, 3);
+ priv->nal_length_size = (bytestream2_get_byte(&gbc) & 3) + 1;
+
+ // SPS array.
+ count = bytestream2_get_byte(&gbc) & 0x1f;
+ start = bytestream2_tell(&gbc);
+ for (i = 0; i < count; i++) {
+ if (bytestream2_get_bytes_left(&gbc) < 2 * (count - i))
+ return AVERROR_INVALIDDATA;
+ size = bytestream2_get_be16(&gbc);
+ if (bytestream2_get_bytes_left(&gbc) < size)
+ return AVERROR_INVALIDDATA;
+ bytestream2_skip(&gbc, size);
+ }
+ end = bytestream2_tell(&gbc);
+
+ err = ff_h2645_packet_split(&priv->read_packet,
+ frag->data + start, end - start,
+ ctx->log_ctx, 1, 2, AV_CODEC_ID_H264, 1);
+ if (err < 0) {
+ av_log(ctx->log_ctx, AV_LOG_ERROR, "Failed to split AVCC SPS array.\n");
+ return err;
+ }
+ err = cbs_h2645_fragment_add_nals(ctx, frag, &priv->read_packet);
+ if (err < 0)
+ return err;
+
+ // PPS array.
+ count = bytestream2_get_byte(&gbc);
+ start = bytestream2_tell(&gbc);
+ for (i = 0; i < count; i++) {
+ if (bytestream2_get_bytes_left(&gbc) < 2 * (count - i))
+ return AVERROR_INVALIDDATA;
+ size = bytestream2_get_be16(&gbc);
+ if (bytestream2_get_bytes_left(&gbc) < size)
+ return AVERROR_INVALIDDATA;
+ bytestream2_skip(&gbc, size);
+ }
+ end = bytestream2_tell(&gbc);
+
+ err = ff_h2645_packet_split(&priv->read_packet,
+ frag->data + start, end - start,
+ ctx->log_ctx, 1, 2, AV_CODEC_ID_H264, 1);
+ if (err < 0) {
+ av_log(ctx->log_ctx, AV_LOG_ERROR, "Failed to split AVCC PPS array.\n");
+ return err;
+ }
+ err = cbs_h2645_fragment_add_nals(ctx, frag, &priv->read_packet);
+ if (err < 0)
+ return err;
+
+ if (bytestream2_get_bytes_left(&gbc) > 0) {
+ av_log(ctx->log_ctx, AV_LOG_WARNING, "%u bytes left at end of AVCC "
+ "header.\n", bytestream2_get_bytes_left(&gbc));
+ }
+
+ } else {
+ // Annex B, or later MP4 with already-known parameters.
+
+ err = ff_h2645_packet_split(&priv->read_packet,
+ frag->data, frag->data_size,
+ ctx->log_ctx,
+ priv->mp4, priv->nal_length_size,
+ codec_id, 1);
+ if (err < 0)
+ return err;
+
+ err = cbs_h2645_fragment_add_nals(ctx, frag, &priv->read_packet);
+ if (err < 0)
+ return err;
+ }
+
+ return 0;
+}
+
+#define cbs_h2645_replace_ps(h26n, ps_name, ps_var, id_element) \
+static int cbs_h26 ## h26n ## _replace_ ## ps_var(CodedBitstreamContext *ctx, \
+ const H26 ## h26n ## Raw ## ps_name *ps_var) \
+{ \
+ CodedBitstreamH26 ## h26n ## Context *priv = ctx->priv_data; \
+ unsigned int id = ps_var->id_element; \
+ if (id > FF_ARRAY_ELEMS(priv->ps_var)) { \
+ av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid " #ps_name \
+ " id : %d.\n", id); \
+ return AVERROR_INVALIDDATA; \
+ } \
+ av_freep(&priv->ps_var[id]); \
+ priv->ps_var[id] = av_malloc(sizeof(*ps_var)); \
+ if (!priv->ps_var[id]) \
+ return AVERROR(ENOMEM); \
+ memcpy(priv->ps_var[id], ps_var, sizeof(*ps_var)); \
+ return 0; \
+}
+
+cbs_h2645_replace_ps(4, SPS, sps, seq_parameter_set_id)
+cbs_h2645_replace_ps(4, PPS, pps, pic_parameter_set_id)
+
+static int cbs_h264_read_nal_unit(CodedBitstreamContext *ctx,
+ CodedBitstreamUnit *unit)
+{
+ GetBitContext gbc;
+ int err;
+
+ err = init_get_bits(&gbc, unit->data, 8 * unit->data_size);
+ if (err < 0)
+ return err;
+
+ switch (unit->type) {
+ case H264_NAL_SPS:
+ {
+ H264RawSPS *sps;
+
+ sps = av_mallocz(sizeof(*sps));
+ if (!sps)
+ return AVERROR(ENOMEM);
+ err = cbs_h264_read_sps(ctx, &gbc, sps);
+ if (err >= 0)
+ err = cbs_h264_replace_sps(ctx, sps);
+ if (err < 0) {
+ av_free(sps);
+ return err;
+ }
+
+ unit->content = sps;
+ }
+ break;
+
+ case H264_NAL_SPS_EXT:
+ {
+ H264RawSPSExtension *sps_ext;
+
+ sps_ext = av_mallocz(sizeof(*sps_ext));
+ if (!sps_ext)
+ return AVERROR(ENOMEM);
+ err = cbs_h264_read_sps_extension(ctx, &gbc, sps_ext);
+ if (err < 0) {
+ av_free(sps_ext);
+ return err;
+ }
+
+ unit->content = sps_ext;
+ }
+ break;
+
+ case H264_NAL_PPS:
+ {
+ H264RawPPS *pps;
+
+ pps = av_mallocz(sizeof(*pps));
+ if (!pps)
+ return AVERROR(ENOMEM);
+ err = cbs_h264_read_pps(ctx, &gbc, pps);
+ if (err >= 0)
+ err = cbs_h264_replace_pps(ctx, pps);
+ if (err < 0) {
+ av_free(pps);
+ return err;
+ }
+
+ unit->content = pps;
+ }
+ break;
+
+ case H264_NAL_SLICE:
+ case H264_NAL_IDR_SLICE:
+ case H264_NAL_AUXILIARY_SLICE:
+ {
+ H264RawSlice *slice;
+ int pos, len;
+
+ slice = av_mallocz(sizeof(*slice));
+ if (!slice)
+ return AVERROR(ENOMEM);
+ err = cbs_h264_read_slice_header(ctx, &gbc, &slice->header);
+ if (err < 0) {
+ av_free(slice);
+ return err;
+ }
+
+ pos = get_bits_count(&gbc);
+ len = unit->data_size;
+ if (!unit->data[len - 1]) {
+ int z;
+ for (z = 0; z < len && !unit->data[len - z - 1]; z++);
+ av_log(ctx->log_ctx, AV_LOG_DEBUG, "Deleted %d trailing zeroes "
+ "from slice data.\n", z);
+ len -= z;
+ }
+
+ slice->data_size = len - pos / 8;
+ slice->data = av_malloc(slice->data_size +
+ AV_INPUT_BUFFER_PADDING_SIZE);
+ if (!slice->data) {
+ av_free(slice);
+ return AVERROR(ENOMEM);
+ }
+ memcpy(slice->data,
+ unit->data + pos / 8, slice->data_size);
+ memset(slice->data + slice->data_size, 0,
+ AV_INPUT_BUFFER_PADDING_SIZE);
+ slice->data_bit_start = pos % 8;
+
+ unit->content = slice;
+ }
+ break;
+
+ case H264_NAL_AUD:
+ {
+ H264RawAUD *aud;
+
+ aud = av_mallocz(sizeof(*aud));
+ if (!aud)
+ return AVERROR(ENOMEM);
+ err = cbs_h264_read_aud(ctx, &gbc, aud);
+ if (err < 0) {
+ av_free(aud);
+ return err;
+ }
+
+ unit->content = aud;
+ }
+ break;
+
+ case H264_NAL_SEI:
+ {
+ H264RawSEI *sei;
+
+ sei = av_mallocz(sizeof(*sei));
+ if (!sei)
+ return AVERROR(ENOMEM);
+ err = cbs_h264_read_sei(ctx, &gbc, sei);
+ if (err < 0) {
+ cbs_h264_free_sei(sei);
+ return err;
+ }
+
+ unit->content = sei;
+ }
+ break;
+
+ default:
+ return AVERROR(ENOSYS);
+ }
+
+ return 0;
+}
+
+static int cbs_h264_write_nal_unit(CodedBitstreamContext *ctx,
+ CodedBitstreamUnit *unit,
+ PutBitContext *pbc)
+{
+ int err;
+
+ switch (unit->type) {
+ case H264_NAL_SPS:
+ {
+ H264RawSPS *sps = unit->content;
+
+ err = cbs_h264_write_sps(ctx, pbc, sps);
+ if (err < 0)
+ return err;
+
+ err = cbs_h264_replace_sps(ctx, sps);
+ if (err < 0)
+ return err;
+ }
+ break;
+
+ case H264_NAL_SPS_EXT:
+ {
+ H264RawSPSExtension *sps_ext;
+
+ err = cbs_h264_write_sps_extension(ctx, pbc, sps_ext);
+ if (err < 0)
+ return err;
+ }
+ break;
+
+ case H264_NAL_PPS:
+ {
+ H264RawPPS *pps = unit->content;
+
+ err = cbs_h264_write_pps(ctx, pbc, pps);
+ if (err < 0)
+ return err;
+
+ err = cbs_h264_replace_pps(ctx, pps);
+ if (err < 0)
+ return err;
+ }
+ break;
+
+ case H264_NAL_SLICE:
+ case H264_NAL_IDR_SLICE:
+ {
+ H264RawSlice *slice = unit->content;
+ GetBitContext gbc;
+ int bits_left, end, zeroes;
+
+ err = cbs_h264_write_slice_header(ctx, pbc, &slice->header);
+ if (err < 0)
+ return err;
+
+ if (slice->data) {
+ if (slice->data_size * 8 + 8 > put_bits_left(pbc))
+ return AVERROR(ENOSPC);
+
+ init_get_bits(&gbc, slice->data, slice->data_size * 8);
+ skip_bits_long(&gbc, slice->data_bit_start);
+
+ // Copy in two-byte blocks, but stop before copying the
+ // rbsp_stop_one_bit in the final byte.
+ while (get_bits_left(&gbc) > 23)
+ put_bits(pbc, 16, get_bits(&gbc, 16));
+
+ bits_left = get_bits_left(&gbc);
+ end = get_bits(&gbc, bits_left);
+
+ // rbsp_stop_one_bit must be present here.
+ av_assert0(end);
+ zeroes = ff_ctz(end);
+ if (bits_left > zeroes + 1)
+ put_bits(pbc, bits_left - zeroes - 1,
+ end >> (zeroes + 1));
+ put_bits(pbc, 1, 1);
+ while (put_bits_count(pbc) % 8 != 0)
+ put_bits(pbc, 1, 0);
+ } else {
+ // No slice data - that was just the header.
+ // (Bitstream may be unaligned!)
+ }
+ }
+ break;
+
+ case H264_NAL_AUD:
+ {
+ err = cbs_h264_write_aud(ctx, pbc, unit->content);
+ if (err < 0)
+ return err;
+ }
+ break;
+
+ case H264_NAL_SEI:
+ {
+ err = cbs_h264_write_sei(ctx, pbc, unit->content);
+ if (err < 0)
+ return err;
+ }
+ break;
+
+ default:
+ av_log(ctx->log_ctx, AV_LOG_ERROR, "Write unimplemented for "
+ "NAL unit type %"PRIu32".\n", unit->type);
+ return AVERROR_PATCHWELCOME;
+ }
+
+ return 0;
+}
+
+static int cbs_h2645_write_nal_unit(CodedBitstreamContext *ctx,
+ CodedBitstreamUnit *unit)
+{
+ CodedBitstreamH2645Context *priv = ctx->priv_data;
+ enum AVCodecID codec_id = ctx->codec->codec_id;
+ PutBitContext pbc;
+ int err;
+
+ if (!priv->write_buffer) {
+ // Initial write buffer size is 1MB.
+ priv->write_buffer_size = 1024 * 1024;
+
+ reallocate_and_try_again:
+ err = av_reallocp(&priv->write_buffer, priv->write_buffer_size);
+ if (err < 0) {
+ av_log(ctx->log_ctx, AV_LOG_ERROR, "Unable to allocate a "
+ "sufficiently large write buffer (last attempt "
+ "%zu bytes).\n", priv->write_buffer_size);
+ return err;
+ }
+ }
+
+ init_put_bits(&pbc, priv->write_buffer, priv->write_buffer_size);
+
+ err = cbs_h264_write_nal_unit(ctx, unit, &pbc);
+
+ if (err == AVERROR(ENOSPC)) {
+ // Overflow.
+ priv->write_buffer_size *= 2;
+ goto reallocate_and_try_again;
+ }
+ // Overflow but we didn't notice.
+ av_assert0(put_bits_count(&pbc) <= 8 * priv->write_buffer_size);
+
+ if (err < 0) {
+ // Write failed for some other reason.
+ return err;
+ }
+
+ if (put_bits_count(&pbc) % 8)
+ unit->data_bit_padding = 8 - put_bits_count(&pbc) % 8;
+ else
+ unit->data_bit_padding = 0;
+
+ unit->data_size = (put_bits_count(&pbc) + 7) / 8;
+ flush_put_bits(&pbc);
+
+ err = av_reallocp(&unit->data, unit->data_size);
+ if (err < 0)
+ return err;
+
+ memcpy(unit->data, priv->write_buffer, unit->data_size);
+
+ return 0;
+}
+
+static int cbs_h2645_assemble_fragment(CodedBitstreamContext *ctx,
+ CodedBitstreamFragment *frag)
+{
+ uint8_t *data;
+ size_t max_size, dp, sp;
+ int err, i, zero_run;
+
+ for (i = 0; i < frag->nb_units; i++) {
+ // Data should already all have been written when we get here.
+ av_assert0(frag->units[i].data);
+ }
+
+ max_size = 0;
+ for (i = 0; i < frag->nb_units; i++) {
+ // Start code + content with worst-case emulation prevention.
+ max_size += 3 + frag->units[i].data_size * 3 / 2;
+ }
+
+ data = av_malloc(max_size);
+ if (!data)
+ return AVERROR(ENOMEM);
+
+ dp = 0;
+ for (i = 0; i < frag->nb_units; i++) {
+ CodedBitstreamUnit *unit = &frag->units[i];
+
+ if (unit->data_bit_padding > 0) {
+ if (i < frag->nb_units - 1)
+ av_log(ctx->log_ctx, AV_LOG_WARNING, "Probably invalid "
+ "unaligned padding on non-final NAL unit.\n");
+ else
+ frag->data_bit_padding = unit->data_bit_padding;
+ }
+
+ if (unit->type == H264_NAL_SPS ||
+ unit->type == H264_NAL_PPS ||
+ i == 0 /* (Assume this is the start of an access unit.) */) {
+ // zero_byte
+ data[dp++] = 0;
+ }
+ // start_code_prefix_one_3bytes
+ data[dp++] = 0;
+ data[dp++] = 0;
+ data[dp++] = 1;
+
+ zero_run = 0;
+ for (sp = 0; sp < unit->data_size; sp++) {
+ if (zero_run < 2) {
+ if (unit->data[sp] == 0)
+ ++zero_run;
+ else
+ zero_run = 0;
+ } else {
+ if ((unit->data[sp] & ~3) == 0) {
+ // emulation_prevention_three_byte
+ data[dp++] = 3;
+ }
+ zero_run = unit->data[sp] == 0;
+ }
+ data[dp++] = unit->data[sp];
+ }
+ }
+
+ av_assert0(dp <= max_size);
+ err = av_reallocp(&data, dp);
+ if (err)
+ return err;
+
+ frag->data = data;
+ frag->data_size = dp;
+
+ return 0;
+}
+
+static void cbs_h264_close(CodedBitstreamContext *ctx)
+{
+ CodedBitstreamH264Context *h264 = ctx->priv_data;
+ int i;
+
+ ff_h2645_packet_uninit(&h264->common.read_packet);
+
+ av_freep(&h264->common.write_buffer);
+
+ for (i = 0; i < FF_ARRAY_ELEMS(h264->sps); i++)
+ av_freep(&h264->sps[i]);
+ for (i = 0; i < FF_ARRAY_ELEMS(h264->pps); i++)
+ av_freep(&h264->pps[i]);
+}
+
+const CodedBitstreamType ff_cbs_type_h264 = {
+ .codec_id = AV_CODEC_ID_H264,
+
+ .priv_data_size = sizeof(CodedBitstreamH264Context),
+
+ .split_fragment = &cbs_h2645_split_fragment,
+ .read_unit = &cbs_h264_read_nal_unit,
+ .write_unit = &cbs_h2645_write_nal_unit,
+ .assemble_fragment = &cbs_h2645_assemble_fragment,
+
+ .free_unit = &cbs_h264_free_nal_unit,
+ .close = &cbs_h264_close,
+};
diff --git a/libavcodec/cbs_h2645.h b/libavcodec/cbs_h2645.h
new file mode 100644
index 0000000000..f4cf65bdde
--- /dev/null
+++ b/libavcodec/cbs_h2645.h
@@ -0,0 +1,43 @@
+/*
+ * 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
+ */
+
+#ifndef AVCODEC_CBS_H2645_H
+#define AVCODEC_CBS_H2645_H
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include "h2645_parse.h"
+
+
+typedef struct CodedBitstreamH2645Context {
+ // If set, the stream being read is in MP4 (AVCC/HVCC) format. If not
+ // set, the stream is assumed to be in annex B format.
+ int mp4;
+ // Size in bytes of the NAL length field for MP4 format.
+ int nal_length_size;
+ // Packet reader.
+ H2645Packet read_packet;
+
+ // Write buffer
+ uint8_t *write_buffer;
+ size_t write_buffer_size;
+} CodedBitstreamH2645Context;
+
+
+#endif /* AVCODEC_CBS_H2645_H */
diff --git a/libavcodec/cbs_h264_syntax_template.c b/libavcodec/cbs_h264_syntax_template.c
new file mode 100644
index 0000000000..8303acbdc4
--- /dev/null
+++ b/libavcodec/cbs_h264_syntax_template.c
@@ -0,0 +1,1230 @@
+/*
+ * 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
+ */
+
+static int FUNC(rbsp_trailing_bits)(CodedBitstreamContext *ctx, RWContext *rw)
+{
+ int err;
+ av_unused int one = 1, zero = 0;
+ xu(1, rbsp_stop_one_bit, one, 1, 1);
+ while (byte_alignment(rw) != 0)
+ xu(1, rbsp_alignment_zero_bit, zero, 0, 0);
+
+ return 0;
+}
+
+static int FUNC(nal_unit_header)(CodedBitstreamContext *ctx, RWContext *rw,
+ H264RawNALUnitHeader *current,
+ uint32_t valid_type_mask)
+{
+ int err;
+
+ u(1, forbidden_zero_bit, 0, 0);
+ u(2, nal_ref_idc, 0, 3);
+ u(5, nal_unit_type, 0, 31);
+
+ if (!(1 << current->nal_unit_type & valid_type_mask)) {
+ av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid NAL unit type %d.\n",
+ current->nal_unit_type);
+ return AVERROR_INVALIDDATA;
+ }
+
+ if (current->nal_unit_type == 14 ||
+ current->nal_unit_type == 20 ||
+ current->nal_unit_type == 21) {
+ if (current->nal_unit_type != 21)
+ flag(svc_extension_flag);
+ else
+ flag(avc_3d_extension_flag);
+
+ if (current->svc_extension_flag) {
+ av_log(ctx->log_ctx, AV_LOG_ERROR, "SVC not supported.\n");
+ return AVERROR_PATCHWELCOME;
+
+ } else if (current->avc_3d_extension_flag) {
+ av_log(ctx->log_ctx, AV_LOG_ERROR, "3DAVC not supported.\n");
+ return AVERROR_PATCHWELCOME;
+
+ } else {
+ av_log(ctx->log_ctx, AV_LOG_ERROR, "MVC not supported.\n");
+ return AVERROR_PATCHWELCOME;
+ }
+ }
+
+ return 0;
+}
+
+static int FUNC(scaling_list)(CodedBitstreamContext *ctx, RWContext *rw,
+ H264RawScalingList *current,
+ int size_of_scaling_list)
+{
+ int err, i, scale;
+
+ scale = 8;
+ for (i = 0; i < size_of_scaling_list; i++) {
+ xse(delta_scale, current->delta_scale[i], -128, +127);
+ scale = (scale + current->delta_scale[i] + 256) % 256;
+ if (scale == 0)
+ break;
+ }
+
+ return 0;
+}
+
+static int FUNC(hrd_parameters)(CodedBitstreamContext *ctx, RWContext *rw,
+ H264RawHRD *current)
+{
+ int err, i;
+
+ ue(cpb_cnt_minus1, 0, 31);
+ u(4, bit_rate_scale, 0, 15);
+ u(4, cpb_size_scale, 0, 15);
+
+ for (i = 0; i <= current->cpb_cnt_minus1; i++) {
+ ue(bit_rate_value_minus1[i], 0, UINT32_MAX - 1);
+ ue(cpb_size_value_minus1[i], 0, UINT32_MAX - 1);
+ flag(cbr_flag[i]);
+ }
+
+ u(5, initial_cpb_removal_delay_length_minus1, 0, 31);
+ u(5, cpb_removal_delay_length_minus1, 0, 31);
+ u(5, dpb_output_delay_length_minus1, 0, 31);
+ u(5, time_offset_length, 0, 31);
+
+ return 0;
+}
+
+static int FUNC(vui_parameters)(CodedBitstreamContext *ctx, RWContext *rw,
+ H264RawVUI *current, H264RawSPS *sps)
+{
+ int err;
+
+ flag(aspect_ratio_info_present_flag);
+ if (current->aspect_ratio_info_present_flag) {
+ u(8, aspect_ratio_idc, 0, 255);
+ if (current->aspect_ratio_idc == 255) {
+ u(16, sar_width, 0, 65535);
+ u(16, sar_height, 0, 65535);
+ }
+ } else {
+ infer(aspect_ratio_idc, 0);
+ }
+
+ flag(overscan_info_present_flag);
+ if (current->overscan_info_present_flag)
+ flag(overscan_appropriate_flag);
+
+ flag(video_signal_type_present_flag);
+ if (current->video_signal_type_present_flag) {
+ u(3, video_format, 0, 7);
+ flag(video_full_range_flag);
+ flag(colour_description_present_flag);
+ if (current->colour_description_present_flag) {
+ u(8, colour_primaries, 0, 255);
+ u(8, transfer_characteristics, 0, 255);
+ u(8, matrix_coefficients, 0, 255);
+ }
+ } else {
+ infer(video_format, 5);
+ infer(video_full_range_flag, 0);
+ infer(colour_primaries, 2);
+ infer(transfer_characteristics, 2);
+ infer(matrix_coefficients, 2);
+ }
+
+ flag(chroma_loc_info_present_flag);
+ if (current->chroma_loc_info_present_flag) {
+ ue(chroma_sample_loc_type_top_field, 0, 5);
+ ue(chroma_sample_loc_type_bottom_field, 0, 5);
+ } else {
+ infer(chroma_sample_loc_type_top_field, 0);
+ infer(chroma_sample_loc_type_bottom_field, 0);
+ }
+
+ flag(timing_info_present_flag);
+ if (current->timing_info_present_flag) {
+ u(32, num_units_in_tick, 1, UINT32_MAX);
+ u(32, time_scale, 1, UINT32_MAX);
+ flag(fixed_frame_rate_flag);
+ } else {
+ infer(fixed_frame_rate_flag, 0);
+ }
+
+ flag(nal_hrd_parameters_present_flag);
+ if (current->nal_hrd_parameters_present_flag)
+ CHECK(FUNC(hrd_parameters)(ctx, rw, ¤t->nal_hrd_parameters));
+
+ flag(vcl_hrd_parameters_present_flag);
+ if (current->vcl_hrd_parameters_present_flag)
+ CHECK(FUNC(hrd_parameters)(ctx, rw, ¤t->vcl_hrd_parameters));
+
+ if (current->nal_hrd_parameters_present_flag ||
+ current->vcl_hrd_parameters_present_flag)
+ flag(low_delay_hrd_flag);
+ else
+ infer(low_delay_hrd_flag, 1 - current->fixed_frame_rate_flag);
+
+ flag(pic_struct_present_flag);
+
+ flag(bitstream_restriction_flag);
+ if (current->bitstream_restriction_flag) {
+ flag(motion_vectors_over_pic_boundaries_flag);
+ ue(max_bytes_per_pic_denom, 0, 16);
+ ue(max_bits_per_mb_denom, 0, 16);
+ ue(log2_max_mv_length_horizontal, 0, 16);
+ ue(log2_max_mv_length_vertical, 0, 16);
+ ue(max_num_reorder_frames, 0, H264_MAX_DPB_FRAMES);
+ ue(max_dec_frame_buffering, 0, H264_MAX_DPB_FRAMES);
+ } else {
+ infer(motion_vectors_over_pic_boundaries_flag, 1);
+ infer(max_bytes_per_pic_denom, 2);
+ infer(max_bits_per_mb_denom, 1);
+ infer(log2_max_mv_length_horizontal, 16);
+ infer(log2_max_mv_length_vertical, 16);
+
+ if ((sps->profile_idc == 44 || sps->profile_idc == 86 ||
+ sps->profile_idc == 110 || sps->profile_idc == 110 ||
+ sps->profile_idc == 122 || sps->profile_idc == 244) &&
+ sps->constraint_set3_flag) {
+ infer(max_num_reorder_frames, 0);
+ infer(max_dec_frame_buffering, 0);
+ } else {
+ infer(max_num_reorder_frames, H264_MAX_DPB_FRAMES);
+ infer(max_dec_frame_buffering, H264_MAX_DPB_FRAMES);
+ }
+ }
+
+ return 0;
+}
+
+static int FUNC(sps)(CodedBitstreamContext *ctx, RWContext *rw,
+ H264RawSPS *current)
+{
+ int err, i;
+
+ HEADER("Sequence Parameter Set");
+
+ CHECK(FUNC(nal_unit_header)(ctx, rw, ¤t->nal_unit_header,
+ 1 << H264_NAL_SPS));
+
+ u(8, profile_idc, 0, 255);
+
+ flag(constraint_set0_flag);
+ flag(constraint_set1_flag);
+ flag(constraint_set2_flag);
+ flag(constraint_set3_flag);
+ flag(constraint_set4_flag);
+ flag(constraint_set5_flag);
+
+ u(2, reserved_zero_2bits, 0, 0);
+
+ u(8, level_idc, 0, 255);
+
+ ue(seq_parameter_set_id, 0, 31);
+
+ if (current->profile_idc == 100 || current->profile_idc == 110 ||
+ current->profile_idc == 122 || current->profile_idc == 244 ||
+ current->profile_idc == 44 || current->profile_idc == 83 ||
+ current->profile_idc == 86 || current->profile_idc == 118 ||
+ current->profile_idc == 128 || current->profile_idc == 138) {
+ ue(chroma_format_idc, 0, 3);
+
+ if (current->chroma_format_idc == 3)
+ flag(separate_colour_plane_flag);
+ else
+ infer(separate_colour_plane_flag, 0);
+
+ ue(bit_depth_luma_minus8, 0, 6);
+ ue(bit_depth_chroma_minus8, 0, 6);
+
+ flag(qpprime_y_zero_transform_bypass_flag);
+
+ flag(seq_scaling_matrix_present_flag);
+ if (current->seq_scaling_matrix_present_flag) {
+ for (i = 0; i < ((current->chroma_format_idc != 3) ? 8 : 12); i++) {
+ flag(seq_scaling_list_present_flag[i]);
+ if (current->seq_scaling_list_present_flag[i]) {
+ if (i < 6)
+ CHECK(FUNC(scaling_list)(ctx, rw,
+ ¤t->scaling_list_4x4[i],
+ 16));
+ else
+ CHECK(FUNC(scaling_list)(ctx, rw,
+ ¤t->scaling_list_8x8[i - 6],
+ 64));
+ }
+ }
+ }
+ } else {
+ infer(chroma_format_idc, current->profile_idc == 183 ? 0 : 1);
+
+ infer(separate_colour_plane_flag, 0);
+ infer(bit_depth_luma_minus8, 0);
+ infer(bit_depth_chroma_minus8, 0);
+ }
+
+ ue(log2_max_frame_num_minus4, 0, 12);
+ ue(pic_order_cnt_type, 0, 2);
+
+ if (current->pic_order_cnt_type == 0) {
+ ue(log2_max_pic_order_cnt_lsb_minus4, 0, 12);
+ } else if (current->pic_order_cnt_type == 1) {
+ flag(delta_pic_order_always_zero_flag);
+ se(offset_for_non_ref_pic, INT32_MIN + 1, INT32_MAX);
+ se(offset_for_top_to_bottom_field, INT32_MIN + 1, INT32_MAX);
+ ue(num_ref_frames_in_pic_order_cnt_cycle, 0, 255);
+
+ for (i = 0; i < current->num_ref_frames_in_pic_order_cnt_cycle; i++)
+ se(offset_for_ref_frame[i], INT32_MIN + 1, INT32_MAX);
+ }
+
+ ue(max_num_ref_frames, 0, H264_MAX_DPB_FRAMES);
+ flag(gaps_in_frame_num_allowed_flag);
+
+ ue(pic_width_in_mbs_minus1, 0, H264_MAX_MB_WIDTH);
+ ue(pic_height_in_map_units_minus1, 0, H264_MAX_MB_HEIGHT);
+
+ flag(frame_mbs_only_flag);
+ if (!current->frame_mbs_only_flag)
+ flag(mb_adaptive_frame_field_flag);
+
+ flag(direct_8x8_inference_flag);
+
+ flag(frame_cropping_flag);
+ if (current->frame_cropping_flag) {
+ ue(frame_crop_left_offset, 0, H264_MAX_WIDTH);
+ ue(frame_crop_right_offset, 0, H264_MAX_WIDTH);
+ ue(frame_crop_top_offset, 0, H264_MAX_HEIGHT);
+ ue(frame_crop_bottom_offset, 0, H264_MAX_HEIGHT);
+ }
+
+ flag(vui_parameters_present_flag);
+ if (current->vui_parameters_present_flag)
+ CHECK(FUNC(vui_parameters)(ctx, rw, ¤t->vui, current));
+
+ CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));
+
+ return 0;
+}
+
+static int FUNC(sps_extension)(CodedBitstreamContext *ctx, RWContext *rw,
+ H264RawSPSExtension *current)
+{
+ int err;
+
+ HEADER("Sequence Parameter Set Extension");
+
+ CHECK(FUNC(nal_unit_header)(ctx, rw, ¤t->nal_unit_header,
+ 1 << H264_NAL_SPS_EXT));
+
+ ue(seq_parameter_set_id, 0, 31);
+
+ ue(aux_format_idc, 0, 3);
+
+ if (current->aux_format_idc != 0) {
+ int bits;
+
+ ue(bit_depth_aux_minus8, 0, 4);
+ flag(alpha_incr_flag);
+
+ bits = current->bit_depth_aux_minus8 + 9;
+ u(bits, alpha_opaque_value, 0, (1 << bits) - 1);
+ u(bits, alpha_transparent_value, 0, (1 << bits) - 1);
+ }
+
+ flag(additional_extension_flag);
+
+ CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));
+
+ return 0;
+}
+
+static int FUNC(pps)(CodedBitstreamContext *ctx, RWContext *rw,
+ H264RawPPS *current)
+{
+ CodedBitstreamH264Context *h264 = ctx->priv_data;
+ const H264RawSPS *sps;
+ int err, i;
+
+ HEADER("Picture Parameter Set");
+
+ CHECK(FUNC(nal_unit_header)(ctx, rw, ¤t->nal_unit_header,
+ 1 << H264_NAL_PPS));
+
+ ue(pic_parameter_set_id, 0, 255);
+ ue(seq_parameter_set_id, 0, 31);
+
+ sps = h264->sps[current->seq_parameter_set_id];
+ if (!sps) {
+ av_log(ctx->log_ctx, AV_LOG_ERROR, "SPS id %d not available.\n",
+ current->seq_parameter_set_id);
+ return AVERROR_INVALIDDATA;
+ }
+
+ flag(entropy_coding_mode_flag);
+ flag(bottom_field_pic_order_in_frame_present_flag);
+
+ ue(num_slice_groups_minus1, 0, 7);
+ if (current->num_slice_groups_minus1 > 0) {
+ unsigned int pic_size;
+ int iGroup;
+
+ pic_size = (sps->pic_width_in_mbs_minus1 + 1) *
+ (sps->pic_height_in_map_units_minus1 + 1);
+
+ ue(slice_group_map_type, 0, 6);
+
+ if (current->slice_group_map_type == 0) {
+ for (iGroup = 0; iGroup <= current->num_slice_groups_minus1; iGroup++)
+ ue(run_length_minus1[iGroup], 0, pic_size - 1);
+
+ } else if (current->slice_group_map_type == 2) {
+ for (iGroup = 0; iGroup < current->num_slice_groups_minus1; iGroup++) {
+ ue(top_left[iGroup], 0, pic_size - 1);
+ ue(bottom_right[iGroup], current->top_left[iGroup], pic_size - 1);
+ }
+ } else if (current->slice_group_map_type == 3 ||
+ current->slice_group_map_type == 4 ||
+ current->slice_group_map_type == 5) {
+ flag(slice_group_change_direction_flag);
+ ue(slice_group_change_rate_minus1, 0, pic_size - 1);
+ } else if (current->slice_group_map_type == 6) {
+ ue(pic_size_in_map_units_minus1, pic_size - 1, pic_size - 1);
+ for (i = 0; i <= current->pic_size_in_map_units_minus1; i++)
+ u(av_log2(2 * current->num_slice_groups_minus1 + 1),
+ slice_group_id[i], 0, current->num_slice_groups_minus1);
+ }
+ }
+
+ ue(num_ref_idx_l0_default_active_minus1, 0, 31);
+ ue(num_ref_idx_l1_default_active_minus1, 0, 31);
+
+ flag(weighted_pred_flag);
+ u(2, weighted_bipred_idc, 0, 2);
+
+ se(pic_init_qp_minus26, -26 - 6 * sps->bit_depth_luma_minus8, +25);
+ se(pic_init_qs_minus26, -26, +25);
+ se(chroma_qp_index_offset, -12, +12);
+
+ flag(deblocking_filter_control_present_flag);
+ flag(constrained_intra_pred_flag);
+ flag(redundant_pic_cnt_present_flag);
+
+ if (more_rbsp_data(current->more_rbsp_data))
+ {
+ flag(transform_8x8_mode_flag);
+
+ flag(pic_scaling_matrix_present_flag);
+ if (current->pic_scaling_matrix_present_flag) {
+ for (i = 0; i < 6 + (((sps->chroma_format_idc != 3) ? 2 : 6) *
+ current->transform_8x8_mode_flag); i++) {
+ flag(pic_scaling_list_present_flag[i]);
+ if (current->pic_scaling_list_present_flag[i]) {
+ if (i < 6)
+ CHECK(FUNC(scaling_list)(ctx, rw,
+ ¤t->scaling_list_4x4[i],
+ 16));
+ else
+ CHECK(FUNC(scaling_list)(ctx, rw,
+ ¤t->scaling_list_8x8[i - 6],
+ 64));
+ }
+ }
+ }
+
+ se(second_chroma_qp_index_offset, -12, +12);
+ } else {
+ infer(transform_8x8_mode_flag, 0);
+ infer(pic_scaling_matrix_present_flag, 0);
+ infer(second_chroma_qp_index_offset, current->chroma_qp_index_offset);
+ }
+
+ CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));
+
+ return 0;
+}
+
+static int FUNC(sei_buffering_period)(CodedBitstreamContext *ctx, RWContext *rw,
+ H264RawSEIBufferingPeriod *current)
+{
+ CodedBitstreamH264Context *h264 = ctx->priv_data;
+ const H264RawSPS *sps;
+ int err, i, length;
+
+ ue(seq_parameter_set_id, 0, 31);
+
+ sps = h264->sps[current->seq_parameter_set_id];
+ if (!sps) {
+ av_log(ctx->log_ctx, AV_LOG_ERROR, "SPS id %d not available.\n",
+ current->seq_parameter_set_id);
+ return AVERROR_INVALIDDATA;
+ }
+ h264->active_sps = sps;
+
+ if (sps->vui.nal_hrd_parameters_present_flag) {
+ for (i = 0; i <= sps->vui.nal_hrd_parameters.cpb_cnt_minus1; i++) {
+ length = sps->vui.nal_hrd_parameters.initial_cpb_removal_delay_length_minus1 + 1;
+ xu(length, initial_cpb_removal_delay[SchedSelIdx],
+ current->nal.initial_cpb_removal_delay[i],
+ 0, (1 << (uint64_t)length) - 1);
+ xu(length, initial_cpb_removal_delay_offset[SchedSelIdx],
+ current->nal.initial_cpb_removal_delay_offset[i],
+ 0, (1 << (uint64_t)length) - 1);
+ }
+ }
+
+ if (sps->vui.vcl_hrd_parameters_present_flag) {
+ for (i = 0; i <= sps->vui.vcl_hrd_parameters.cpb_cnt_minus1; i++) {
+ length = sps->vui.vcl_hrd_parameters.initial_cpb_removal_delay_length_minus1 + 1;
+ xu(length, initial_cpb_removal_delay[SchedSelIdx],
+ current->vcl.initial_cpb_removal_delay[i],
+ 0, (1 << (uint64_t)length) - 1);
+ xu(length, initial_cpb_removal_delay_offset[SchedSelIdx],
+ current->vcl.initial_cpb_removal_delay_offset[i],
+ 0, (1 << (uint64_t)length) - 1);
+ }
+ }
+
+ return 0;
+}
+
+static int FUNC(sei_pic_timestamp)(CodedBitstreamContext *ctx, RWContext *rw,
+ H264RawSEIPicTimestamp *current)
+{
+ CodedBitstreamH264Context *h264 = ctx->priv_data;
+ const H264RawSPS *sps;
+ uint8_t time_offset_length;
+ int err;
+
+ u(2, ct_type, 0, 2);
+ flag(nuit_field_based_flag);
+ u(5, counting_type, 0, 6);
+ flag(full_timestamp_flag);
+ flag(discontinuity_flag);
+ flag(cnt_dropped_flag);
+ u(8, n_frames, 0, 255);
+ if (current->full_timestamp_flag) {
+ u(6, seconds_value, 0, 59);
+ u(6, minutes_value, 0, 59);
+ u(5, hours_value, 0, 23);
+ } else {
+ flag(seconds_flag);
+ if (current->seconds_flag) {
+ u(6, seconds_value, 0, 59);
+ flag(minutes_flag);
+ if (current->minutes_flag) {
+ u(6, minutes_value, 0, 59);
+ flag(hours_flag);
+ if (current->hours_flag)
+ u(5, hours_value, 0, 23);
+ }
+ }
+ }
+
+ sps = h264->active_sps;
+ if (sps->vui.nal_hrd_parameters_present_flag)
+ time_offset_length = sps->vui.nal_hrd_parameters.time_offset_length;
+ else if (sps->vui.vcl_hrd_parameters_present_flag)
+ time_offset_length = sps->vui.vcl_hrd_parameters.time_offset_length;
+ else
+ time_offset_length = 24;
+
+ if (time_offset_length > 0)
+ u(time_offset_length, time_offset,
+ 0, (1 << (uint64_t)time_offset_length) - 1);
+ else
+ infer(time_offset, 0);
+
+ return 0;
+}
+
+static int FUNC(sei_pic_timing)(CodedBitstreamContext *ctx, RWContext *rw,
+ H264RawSEIPicTiming *current)
+{
+ CodedBitstreamH264Context *h264 = ctx->priv_data;
+ const H264RawSPS *sps;
+ int err;
+
+ sps = h264->active_sps;
+ if (!sps) {
+ av_log(ctx->log_ctx, AV_LOG_ERROR,
+ "No active SPS for pic_timing.\n");
+ return AVERROR_INVALIDDATA;
+ }
+
+ if (sps->vui.nal_hrd_parameters_present_flag ||
+ sps->vui.vcl_hrd_parameters_present_flag) {
+ const H264RawHRD *hrd;
+
+ if (sps->vui.nal_hrd_parameters_present_flag)
+ hrd = &sps->vui.nal_hrd_parameters;
+ else if (sps->vui.vcl_hrd_parameters_present_flag)
+ hrd = &sps->vui.vcl_hrd_parameters;
+ else {
+ av_log(ctx->log_ctx, AV_LOG_ERROR,
+ "No HRD parameters for pic_timing.\n");
+ return AVERROR_INVALIDDATA;
+ }
+
+ u(hrd->cpb_removal_delay_length_minus1 + 1, cpb_removal_delay,
+ 0, (1 << (uint64_t)hrd->cpb_removal_delay_length_minus1) + 1);
+ u(hrd->dpb_output_delay_length_minus1 + 1, dpb_output_delay,
+ 0, (1 << (uint64_t)hrd->dpb_output_delay_length_minus1) + 1);
+ }
+
+ if (sps->vui.pic_struct_present_flag) {
+ static const int num_clock_ts[9] = {
+ 1, 1, 1, 2, 2, 3, 3, 2, 3
+ };
+ int i;
+
+ u(4, pic_struct, 0, 8);
+ if (current->pic_struct > 8)
+ return AVERROR_INVALIDDATA;
+
+ for (i = 0; i < num_clock_ts[current->pic_struct]; i++) {
+ flag(clock_timestamp_flag[i]);
+ if (current->clock_timestamp_flag[i])
+ CHECK(FUNC(sei_pic_timestamp)(ctx, rw, ¤t->timestamp[i]));
+ }
+ }
+
+ return 0;
+}
+
+static int FUNC(sei_user_data_registered)(CodedBitstreamContext *ctx, RWContext *rw,
+ H264RawSEIUserDataRegistered *current,
+ uint32_t *payload_size)
+{
+ int err, i, j;
+
+ u(8, itu_t_t35_country_code, 0x00, 0xff);
+ if (current->itu_t_t35_country_code != 0xff)
+ i = 1;
+ else {
+ u(8, itu_t_t35_country_code_extension_byte, 0x00, 0xff);
+ i = 2;
+ }
+
+#ifdef READ
+ if (*payload_size < i) {
+ av_log(ctx->log_ctx, AV_LOG_ERROR,
+ "Invalid SEI user data registered payload.\n");
+ return AVERROR_INVALIDDATA;
+ }
+ current->data_length = *payload_size - i;
+#else
+ *payload_size = i + current->data_length;
+#endif
+
+ allocate(current->data, current->data_length);
+ for (j = 0; j < current->data_length; j++)
+ xu(8, itu_t_t35_payload_byte, current->data[j], 0x00, 0xff);
+
+ return 0;
+}
+
+static int FUNC(sei_user_data_unregistered)(CodedBitstreamContext *ctx, RWContext *rw,
+ H264RawSEIUserDataUnregistered *current,
+ uint32_t *payload_size)
+{
+ int err, i;
+
+#ifdef READ
+ if (*payload_size < 16) {
+ av_log(ctx->log_ctx, AV_LOG_ERROR,
+ "Invalid SEI user data unregistered payload.\n");
+ return AVERROR_INVALIDDATA;
+ }
+ current->data_length = *payload_size - 16;
+#else
+ *payload_size = 16 + current->data_length;
+#endif
+
+ for (i = 0; i < 16; i++) {
+ xu(8, uuid_iso_iec_11578,
+ current->uuid_iso_iec_11578[i], 0x00, 0xff);
+ }
+
+ allocate(current->data, current->data_length);
+
+ for (i = 0; i < current->data_length; i++)
+ xu(8, user_data_payload_byte, current->data[i], 0x00, 0xff);
+
+ return 0;
+}
+
+static int FUNC(sei_recovery_point)(CodedBitstreamContext *ctx, RWContext *rw,
+ H264RawSEIRecoveryPoint *current)
+{
+ int err;
+
+ ue(recovery_frame_cnt, 0, 65535);
+ flag(exact_match_flag);
+ flag(broken_link_flag);
+ u(2, changing_slice_group_idc, 0, 2);
+
+ return 0;
+}
+
+static int FUNC(sei_display_orientation)(CodedBitstreamContext *ctx, RWContext *rw,
+ H264RawSEIDisplayOrientation *current)
+{
+ int err;
+
+ flag(display_orientation_cancel_flag);
+ if (!current->display_orientation_cancel_flag) {
+ flag(hor_flip);
+ flag(ver_flip);
+ u(16, anticlockwise_rotation, 0, 65535);
+ ue(display_orientation_repetition_period, 0, 16384);
+ flag(display_orientation_extension_flag);
+ }
+
+ return 0;
+}
+
+static int FUNC(sei_payload)(CodedBitstreamContext *ctx, RWContext *rw,
+ H264RawSEIPayload *current)
+{
+ int err, i;
+ int start_position, end_position;
+
+#ifdef READ
+ start_position = get_bits_count(rw);
+#else
+ start_position = put_bits_count(rw);
+#endif
+
+ switch (current->payload_type) {
+ case H264_SEI_TYPE_BUFFERING_PERIOD:
+ CHECK(FUNC(sei_buffering_period)
+ (ctx, rw, ¤t->payload.buffering_period));
+ break;
+ case H264_SEI_TYPE_PIC_TIMING:
+ CHECK(FUNC(sei_pic_timing)
+ (ctx, rw, ¤t->payload.pic_timing));
+ break;
+ case H264_SEI_TYPE_FILLER_PAYLOAD:
+ {
+ av_unused int ff_byte = 0xff;
+ for (i = 0; i < current->payload_size; i++)
+ xu(8, ff_byte, ff_byte, 0xff, 0xff);
+ }
+ break;
+ case H264_SEI_TYPE_USER_DATA_REGISTERED:
+ CHECK(FUNC(sei_user_data_registered)
+ (ctx, rw, ¤t->payload.user_data_registered, ¤t->payload_size));
+ break;
+ case H264_SEI_TYPE_USER_DATA_UNREGISTERED:
+ CHECK(FUNC(sei_user_data_unregistered)
+ (ctx, rw, ¤t->payload.user_data_unregistered, ¤t->payload_size));
+ break;
+ case H264_SEI_TYPE_RECOVERY_POINT:
+ CHECK(FUNC(sei_recovery_point)
+ (ctx, rw, ¤t->payload.recovery_point));
+ break;
+ case H264_SEI_TYPE_DISPLAY_ORIENTATION:
+ CHECK(FUNC(sei_display_orientation)
+ (ctx, rw, ¤t->payload.display_orientation));
+ break;
+ default:
+ {
+ allocate(current->payload.other.data, current->payload_size);
+ for (i = 0; i < current->payload_size; i++)
+ xu(8, payload_byte, current->payload.other.data[i], 0, 255);
+ }
+ }
+
+ if (byte_alignment(rw)) {
+ av_unused int one = 1, zero = 0;
+ xu(1, bit_equal_to_one, one, 1, 1);
+ while (byte_alignment(rw))
+ xu(1, bit_equal_to_zero, zero, 0, 0);
+ }
+
+#ifdef READ
+ end_position = get_bits_count(rw);
+ if (end_position < start_position + 8 * current->payload_size) {
+ av_log(ctx->log_ctx, AV_LOG_ERROR, "Incorrect SEI payload length: "
+ "header %d bits, actually %d bits.\n",
+ 8 * current->payload_size,
+ end_position - start_position);
+ return AVERROR_INVALIDDATA;
+ }
+#else
+ end_position = put_bits_count(rw);
+ current->payload_size = (end_position - start_position) / 8;
+#endif
+
+ return 0;
+}
+
+static int FUNC(sei)(CodedBitstreamContext *ctx, RWContext *rw,
+ H264RawSEI *current)
+{
+ int err, k;
+
+ HEADER("Supplemental Enhancement Information");
+
+ CHECK(FUNC(nal_unit_header)(ctx, rw, ¤t->nal_unit_header,
+ 1 << H264_NAL_SEI));
+
+#ifdef READ
+ for (k = 0; k < H264_MAX_SEI_PAYLOADS; k++) {
+ uint32_t payload_type = 0;
+ uint32_t payload_size = 0;
+ uint32_t tmp;
+
+ while (show_bits(rw, 8) == 0xff) {
+ xu(8, ff_byte, tmp, 0xff, 0xff);
+ payload_type += 255;
+ }
+ xu(8, last_payload_type_byte, tmp, 0, 254);
+ payload_type += tmp;
+
+ while (show_bits(rw, 8) == 0xff) {
+ xu(8, ff_byte, tmp, 0xff, 0xff);
+ payload_size += 255;
+ }
+ xu(8, last_payload_size_byte, tmp, 0, 254);
+ payload_size += tmp;
+
+ current->payload[k].payload_type = payload_type;
+ current->payload[k].payload_size = payload_size;
+
+ CHECK(FUNC(sei_payload)(ctx, rw, ¤t->payload[k]));
+
+ if (!cbs_h2645_read_more_rbsp_data(rw))
+ break;
+ }
+ if (k >= H264_MAX_SEI_PAYLOADS) {
+ av_log(ctx->log_ctx, AV_LOG_ERROR, "Too many payloads in "
+ "SEI message: found %d.\n", k);
+ return AVERROR_INVALIDDATA;
+ }
+ current->payload_count = k + 1;
+#else
+ for (k = 0; k < current->payload_count; k++) {
+ PutBitContext start_state;
+ uint32_t tmp;
+ int need_size, i;
+
+ // Somewhat clumsy: we write the payload twice when
+ // we don't know the size in advance. This will mess
+ // with trace output, but is otherwise harmless.
+ start_state = *rw;
+ need_size = !current->payload[k].payload_size;
+ for (i = 0; i < 1 + need_size; i++) {
+ *rw = start_state;
+
+ tmp = current->payload[k].payload_type;
+ while (tmp >= 255) {
+ xu(8, ff_byte, 0xff, 0xff, 0xff);
+ tmp -= 255;
+ }
+ xu(8, last_payload_type_byte, tmp, 0, 254);
+
+ tmp = current->payload[k].payload_size;
+ while (tmp >= 255) {
+ xu(8, ff_byte, 0xff, 0xff, 0xff);
+ tmp -= 255;
+ }
+ xu(8, last_payload_size_byte, tmp, 0, 254);
+
+ CHECK(FUNC(sei_payload)(ctx, rw, ¤t->payload[k]));
+ }
+ }
+#endif
+
+ CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));
+
+ return 0;
+}
+
+static int FUNC(aud)(CodedBitstreamContext *ctx, RWContext *rw,
+ H264RawAUD *current)
+{
+ int err;
+
+ HEADER("Access Unit Delimiter");
+
+ CHECK(FUNC(nal_unit_header)(ctx, rw, ¤t->nal_unit_header,
+ 1 << H264_NAL_AUD));
+
+ u(3, primary_pic_type, 0, 7);
+
+ CHECK(FUNC(rbsp_trailing_bits)(ctx, rw));
+
+ return 0;
+}
+
+static int FUNC(ref_pic_list_modification)(CodedBitstreamContext *ctx, RWContext *rw,
+ H264RawSliceHeader *current)
+{
+ CodedBitstreamH264Context *h264 = ctx->priv_data;
+ const H264RawSPS *sps = h264->active_sps;
+ int err, i, mopn;
+
+ if (current->slice_type % 5 != 2 &&
+ current->slice_type % 5 != 4) {
+ flag(ref_pic_list_modification_flag_l0);
+ if (current->ref_pic_list_modification_flag_l0) {
+ for (i = 0; i < H264_MAX_RPLM_COUNT; i++) {
+ xue(modification_of_pic_nums_idc,
+ current->rplm_l0[i].modification_of_pic_nums_idc, 0, 3);
+
+ mopn = current->rplm_l0[i].modification_of_pic_nums_idc;
+ if (mopn == 3)
+ break;
+
+ if (mopn == 0 || mopn == 1)
+ xue(abs_diff_pic_num_minus1,
+ current->rplm_l0[i].abs_diff_pic_num_minus1,
+ 0, (1 + current->field_pic_flag) *
+ (1 << (sps->log2_max_frame_num_minus4 + 4)));
+ else if (mopn == 2)
+ xue(long_term_pic_num,
+ current->rplm_l0[i].long_term_pic_num,
+ 0, sps->max_num_ref_frames - 1);
+ }
+ }
+ }
+
+ if (current->slice_type % 5 == 1) {
+ flag(ref_pic_list_modification_flag_l1);
+ if (current->ref_pic_list_modification_flag_l1) {
+ for (i = 0; i < H264_MAX_RPLM_COUNT; i++) {
+ xue(modification_of_pic_nums_idc,
+ current->rplm_l1[i].modification_of_pic_nums_idc, 0, 3);
+
+ mopn = current->rplm_l1[i].modification_of_pic_nums_idc;
+ if (mopn == 3)
+ break;
+
+ if (mopn == 0 || mopn == 1)
+ xue(abs_diff_pic_num_minus1,
+ current->rplm_l1[i].abs_diff_pic_num_minus1,
+ 0, (1 + current->field_pic_flag) *
+ (1 << (sps->log2_max_frame_num_minus4 + 4)));
+ else if (mopn == 2)
+ xue(long_term_pic_num,
+ current->rplm_l1[i].long_term_pic_num,
+ 0, sps->max_num_ref_frames - 1);
+ }
+ }
+ }
+
+ return 0;
+}
+
+static int FUNC(pred_weight_table)(CodedBitstreamContext *ctx, RWContext *rw,
+ H264RawSliceHeader *current)
+{
+ CodedBitstreamH264Context *h264 = ctx->priv_data;
+ const H264RawSPS *sps = h264->active_sps;
+ int chroma;
+ int err, i, j;
+
+ ue(luma_log2_weight_denom, 0, 7);
+
+ chroma = !sps->separate_colour_plane_flag && sps->chroma_format_idc != 0;
+ if (chroma)
+ ue(chroma_log2_weight_denom, 0, 7);
+
+ for (i = 0; i <= current->num_ref_idx_l0_active_minus1; i++) {
+ flag(luma_weight_l0_flag[i]);
+ if (current->luma_weight_l0_flag[i]) {
+ se(luma_weight_l0[i], -128, +127);
+ se(luma_offset_l0[i], -128, +127);
+ }
+ if (chroma) {
+ flag(chroma_weight_l0_flag[i]);
+ if (current->chroma_weight_l0_flag[i]) {
+ for (j = 0; j < 2; j++) {
+ se(chroma_weight_l0[i][j], -128, +127);
+ se(chroma_offset_l0[i][j], -128, +127);
+ }
+ }
+ }
+ }
+
+ if (current->slice_type % 5 == 1) {
+ for (i = 0; i <= current->num_ref_idx_l1_active_minus1; i++) {
+ flag(luma_weight_l1_flag[i]);
+ if (current->luma_weight_l1_flag[i]) {
+ se(luma_weight_l1[i], -128, +127);
+ se(luma_offset_l1[i], -128, +127);
+ }
+ if (chroma) {
+ flag(chroma_weight_l1_flag[i]);
+ if (current->chroma_weight_l1_flag[i]) {
+ for (j = 0; j < 2; j++) {
+ se(chroma_weight_l1[i][j], -128, +127);
+ se(chroma_offset_l1[i][j], -128, +127);
+ }
+ }
+ }
+ }
+ }
+
+ return 0;
+}
+
+static int FUNC(dec_ref_pic_marking)(CodedBitstreamContext *ctx, RWContext *rw,
+ H264RawSliceHeader *current, int idr_pic_flag)
+{
+ CodedBitstreamH264Context *h264 = ctx->priv_data;
+ const H264RawSPS *sps = h264->active_sps;
+ int err, i;
+ uint32_t mmco;
+
+ if (idr_pic_flag) {
+ flag(no_output_of_prior_pics_flag);
+ flag(long_term_reference_flag);
+ } else {
+ flag(adaptive_ref_pic_marking_mode_flag);
+ if (current->adaptive_ref_pic_marking_mode_flag) {
+ for (i = 0; i < H264_MAX_MMCO_COUNT; i++) {
+ xue(memory_management_control_operation,
+ current->mmco[i].memory_management_control_operation,
+ 0, 6);
+
+ mmco = current->mmco[i].memory_management_control_operation;
+ if (mmco == 0)
+ break;
+
+ if (mmco == 1 || mmco == 3)
+ xue(difference_of_pic_nums_minus1,
+ current->mmco[i].difference_of_pic_nums_minus1,
+ 0, INT32_MAX);
+ if (mmco == 2)
+ xue(long_term_pic_num,
+ current->mmco[i].long_term_pic_num,
+ 0, sps->max_num_ref_frames - 1);
+ if (mmco == 3 || mmco == 6)
+ xue(long_term_frame_idx,
+ current->mmco[i].long_term_frame_idx,
+ 0, sps->max_num_ref_frames - 1);
+ if (mmco == 4)
+ xue(max_long_term_frame_idx_plus1,
+ current->mmco[i].max_long_term_frame_idx_plus1,
+ 0, sps->max_num_ref_frames);
+ }
+ if (i == H264_MAX_MMCO_COUNT) {
+ av_log(ctx->log_ctx, AV_LOG_ERROR, "Too many "
+ "memory management control operations.\n");
+ return AVERROR_INVALIDDATA;
+ }
+ }
+ }
+
+ return 0;
+}
+
+static int FUNC(slice_header)(CodedBitstreamContext *ctx, RWContext *rw,
+ H264RawSliceHeader *current)
+{
+ CodedBitstreamH264Context *h264 = ctx->priv_data;
+ const H264RawSPS *sps;
+ const H264RawPPS *pps;
+ int err;
+ int idr_pic_flag;
+ int slice_type_i, slice_type_p, slice_type_b;
+ int slice_type_si, slice_type_sp;
+
+ HEADER("Slice Header");
+
+ CHECK(FUNC(nal_unit_header)(ctx, rw, ¤t->nal_unit_header,
+ 1 << H264_NAL_SLICE |
+ 1 << H264_NAL_IDR_SLICE |
+ 1 << H264_NAL_AUXILIARY_SLICE));
+
+ if (current->nal_unit_header.nal_unit_type == H264_NAL_AUXILIARY_SLICE) {
+ if (!h264->last_slice_nal_unit_type) {
+ av_log(ctx->log_ctx, AV_LOG_ERROR, "Auxiliary slice "
+ "is not decodable without the main picture "
+ "in the same access unit.\n");
+ return AVERROR_INVALIDDATA;
+ }
+ } else {
+ h264->last_slice_nal_unit_type =
+ current->nal_unit_header.nal_unit_type;
+ }
+ idr_pic_flag = h264->last_slice_nal_unit_type == H264_NAL_IDR_SLICE;
+
+ ue(first_mb_in_slice, 0, H264_MAX_MB_PIC_SIZE - 1);
+ ue(slice_type, 0, 9);
+
+ slice_type_i = current->slice_type % 5 == 2;
+ slice_type_p = current->slice_type % 5 == 0;
+ slice_type_b = current->slice_type % 5 == 1;
+ slice_type_si = current->slice_type % 5 == 4;
+ slice_type_sp = current->slice_type % 5 == 3;
+
+ if (idr_pic_flag && !(slice_type_i || slice_type_si)) {
+ av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid slice type %d "
+ "for IDR picture.\n", current->slice_type);
+ return AVERROR_INVALIDDATA;
+ }
+
+ ue(pic_parameter_set_id, 0, 255);
+
+ pps = h264->pps[current->pic_parameter_set_id];
+ if (!pps) {
+ av_log(ctx->log_ctx, AV_LOG_ERROR, "PPS id %d not available.\n",
+ current->pic_parameter_set_id);
+ return AVERROR_INVALIDDATA;
+ }
+ h264->active_pps = pps;
+
+ sps = h264->sps[pps->seq_parameter_set_id];
+ if (!sps) {
+ av_log(ctx->log_ctx, AV_LOG_ERROR, "SPS id %d not available.\n",
+ pps->seq_parameter_set_id);
+ return AVERROR_INVALIDDATA;
+ }
+ h264->active_sps = sps;
+
+ if (sps->separate_colour_plane_flag)
+ u(2, colour_plane_id, 0, 2);
+
+ u(sps->log2_max_frame_num_minus4 + 4, frame_num,
+ 0, (1 << (sps->log2_max_frame_num_minus4 + 4)) - 1);
+
+ if (!sps->frame_mbs_only_flag) {
+ flag(field_pic_flag);
+ if (current->field_pic_flag)
+ flag(bottom_field_flag);
+ else
+ infer(bottom_field_flag, 0);
+ } else {
+ infer(field_pic_flag, 0);
+ infer(bottom_field_flag, 0);
+ }
+
+ if (idr_pic_flag)
+ ue(idr_pic_id, 0, 65535);
+
+ if (sps->pic_order_cnt_type == 0) {
+ u(sps->log2_max_pic_order_cnt_lsb_minus4 + 4, pic_order_cnt_lsb,
+ 0, (1 << (sps->log2_max_pic_order_cnt_lsb_minus4 + 4)) - 1);
+ if (pps->bottom_field_pic_order_in_frame_present_flag &&
+ !current->field_pic_flag)
+ se(delta_pic_order_cnt_bottom, INT32_MIN + 1, INT32_MAX);
+
+ } else if (sps->pic_order_cnt_type == 1) {
+ if (!sps->delta_pic_order_always_zero_flag) {
+ se(delta_pic_order_cnt[0], INT32_MIN + 1, INT32_MAX);
+ if (pps->bottom_field_pic_order_in_frame_present_flag &&
+ !current->field_pic_flag)
+ se(delta_pic_order_cnt[1], INT32_MIN + 1, INT32_MAX);
+ else
+ infer(delta_pic_order_cnt[1], 0);
+ } else {
+ infer(delta_pic_order_cnt[0], 0);
+ infer(delta_pic_order_cnt[1], 0);
+ }
+ }
+
+ if (pps->redundant_pic_cnt_present_flag)
+ ue(redundant_pic_cnt, 0, 127);
+
+ if (slice_type_b)
+ flag(direct_spatial_mv_pred_flag);
+
+ if (slice_type_p || slice_type_sp || slice_type_b) {
+ flag(num_ref_idx_active_override_flag);
+ if (current->num_ref_idx_active_override_flag) {
+ ue(num_ref_idx_l0_active_minus1, 0, 31);
+ if (slice_type_b)
+ ue(num_ref_idx_l1_active_minus1, 0, 31);
+ } else {
+ infer(num_ref_idx_l0_active_minus1,
+ pps->num_ref_idx_l0_default_active_minus1);
+ infer(num_ref_idx_l1_active_minus1,
+ pps->num_ref_idx_l1_default_active_minus1);
+ }
+ }
+
+ if (current->nal_unit_header.nal_unit_type == 20 ||
+ current->nal_unit_header.nal_unit_type == 21) {
+ av_log(ctx->log_ctx, AV_LOG_ERROR, "MVC / 3DAVC not supported.\n");
+ return AVERROR_PATCHWELCOME;
+ } else {
+ CHECK(FUNC(ref_pic_list_modification)(ctx, rw, current));
+ }
+
+ if ((pps->weighted_pred_flag && (slice_type_p || slice_type_sp)) ||
+ (pps->weighted_bipred_idc == 1 && slice_type_b)) {
+ CHECK(FUNC(pred_weight_table)(ctx, rw, current));
+ }
+
+ if (current->nal_unit_header.nal_ref_idc != 0) {
+ CHECK(FUNC(dec_ref_pic_marking)(ctx, rw, current, idr_pic_flag));
+ }
+
+ if (pps->entropy_coding_mode_flag &&
+ !slice_type_i && !slice_type_si) {
+ ue(cabac_init_idc, 0, 2);
+ }
+
+ se(slice_qp_delta, - 51 - 6 * sps->bit_depth_luma_minus8,
+ + 51 + 6 * sps->bit_depth_luma_minus8);
+ if (slice_type_sp || slice_type_si) {
+ if (slice_type_sp)
+ flag(sp_for_switch_flag);
+ se(slice_qs_delta, -51, +51);
+ }
+
+ if (pps->deblocking_filter_control_present_flag) {
+ ue(disable_deblocking_filter_idc, 0, 2);
+ if (current->disable_deblocking_filter_idc != 1) {
+ se(slice_alpha_c0_offset_div2, -6, +6);
+ se(slice_beta_offset_div2, -6, +6);
+ } else {
+ infer(slice_alpha_c0_offset_div2, 0);
+ infer(slice_beta_offset_div2, 0);
+ }
+ } else {
+ infer(disable_deblocking_filter_idc, 0);
+ infer(slice_alpha_c0_offset_div2, 0);
+ infer(slice_beta_offset_div2, 0);
+ }
+
+ if (pps->num_slice_groups_minus1 > 0 &&
+ pps->slice_group_map_type >= 3 &&
+ pps->slice_group_map_type <= 5) {
+ unsigned int pic_size, max, bits;
+
+ pic_size = (sps->pic_width_in_mbs_minus1 + 1) *
+ (sps->pic_height_in_map_units_minus1 + 1);
+ max = (pic_size + pps->slice_group_change_rate_minus1) /
+ (pps->slice_group_change_rate_minus1 + 1);
+ bits = av_log2(2 * max - 1);
+
+ u(bits, slice_group_change_cycle, 0, max);
+ }
+
+ if (pps->entropy_coding_mode_flag) {
+ av_unused int one = 1;
+ while (byte_alignment(rw))
+ xu(1, cabac_alignment_one_bit, one, 1, 1);
+ }
+
+ return 0;
+}
diff --git a/libavcodec/cbs_internal.h b/libavcodec/cbs_internal.h
index 3bbc3355c2..54ba3cfa03 100644
--- a/libavcodec/cbs_internal.h
+++ b/libavcodec/cbs_internal.h
@@ -80,4 +80,7 @@ int ff_cbs_write_unsigned(CodedBitstreamContext *ctx, PutBitContext *pbc,
uint32_t range_min, uint32_t range_max);
+extern const CodedBitstreamType ff_cbs_type_h264;
+
+
#endif /* AVCODEC_CBS_INTERNAL_H */
--
2.11.0
More information about the ffmpeg-devel
mailing list