/* * 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 "libavutil/mem.h" #include "bytestream.h" #include "cbs.h" #include "cbs_internal.h" #include "cbs_h264.h" #include "cbs_h265.h" #include "cbs_h266.h" #include "h264.h" #include "h2645_parse.h" #include "hevc.h" #include "refstruct.h" #include "vvc.h" static int cbs_read_ue_golomb(CodedBitstreamContext *ctx, GetBitContext *gbc, const char *name, const int *subscripts, uint32_t *write_to, uint32_t range_min, uint32_t range_max) { uint32_t leading_bits, value; int max_length, leading_zeroes; CBS_TRACE_READ_START(); max_length = FFMIN(get_bits_left(gbc), 32); leading_bits = max_length ? show_bits_long(gbc, max_length) : 0; if (leading_bits == 0) { if (max_length >= 32) { av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid ue-golomb code at " "%s: more than 31 zeroes.\n", name); return AVERROR_INVALIDDATA; } else { av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid ue-golomb code at " "%s: bitstream ended.\n", name); return AVERROR_INVALIDDATA; } } leading_zeroes = max_length - 1 - av_log2(leading_bits); skip_bits_long(gbc, leading_zeroes); if (get_bits_left(gbc) < leading_zeroes + 1) { av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid ue-golomb code at " "%s: bitstream ended.\n", name); return AVERROR_INVALIDDATA; } value = get_bits_long(gbc, leading_zeroes + 1) - 1; CBS_TRACE_READ_END(); 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, const int *subscripts, int32_t *write_to, int32_t range_min, int32_t range_max) { uint32_t leading_bits, unsigned_value; int max_length, leading_zeroes; int32_t value; CBS_TRACE_READ_START(); max_length = FFMIN(get_bits_left(gbc), 32); leading_bits = max_length ? show_bits_long(gbc, max_length) : 0; if (leading_bits == 0) { if (max_length >= 32) { av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid se-golomb code at " "%s: more than 31 zeroes.\n", name); return AVERROR_INVALIDDATA; } else { av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid se-golomb code at " "%s: bitstream ended.\n", name); return AVERROR_INVALIDDATA; } } leading_zeroes = max_length - 1 - av_log2(leading_bits); skip_bits_long(gbc, leading_zeroes); if (get_bits_left(gbc) < leading_zeroes + 1) { av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid se-golomb code at " "%s: bitstream ended.\n", name); return AVERROR_INVALIDDATA; } unsigned_value = get_bits_long(gbc, leading_zeroes + 1); if (unsigned_value & 1) value = -(int32_t)(unsigned_value / 2); else value = unsigned_value / 2; CBS_TRACE_READ_END(); 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, const int *subscripts, uint32_t value, uint32_t range_min, uint32_t range_max) { int len; CBS_TRACE_WRITE_START(); 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); put_bits(pbc, len, 0); if (len + 1 < 32) put_bits(pbc, len + 1, value + 1); else put_bits32(pbc, value + 1); CBS_TRACE_WRITE_END(); return 0; } static int cbs_write_se_golomb(CodedBitstreamContext *ctx, PutBitContext *pbc, const char *name, const int *subscripts, int32_t value, int32_t range_min, int32_t range_max) { int len; uint32_t uvalue; CBS_TRACE_WRITE_START(); 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); put_bits(pbc, len, 0); if (len + 1 < 32) put_bits(pbc, len + 1, uvalue + 1); else put_bits32(pbc, uvalue + 1); CBS_TRACE_WRITE_END(); return 0; } // payload_extension_present() - true if we are before the last 1-bit // in the payload structure, which must be in the last byte. static int cbs_h265_payload_extension_present(GetBitContext *gbc, uint32_t payload_size, int cur_pos) { int bits_left = payload_size * 8 - cur_pos; return (bits_left > 0 && (bits_left > 7 || show_bits(gbc, bits_left) & MAX_UINT_BITS(bits_left - 1))); } #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_NAME2(rw, codec, name) cbs_ ## codec ## _ ## rw ## _ ## name #define FUNC_NAME1(rw, codec, name) FUNC_NAME2(rw, codec, name) #define FUNC_H264(name) FUNC_NAME1(READWRITE, h264, name) #define FUNC_H265(name) FUNC_NAME1(READWRITE, h265, name) #define FUNC_H266(name) FUNC_NAME1(READWRITE, h266, name) #define FUNC_SEI(name) FUNC_NAME1(READWRITE, sei, name) #define SEI_FUNC(name, args) \ static int FUNC(name) args; \ static int FUNC(name ## _internal)(CodedBitstreamContext *ctx, \ RWContext *rw, void *cur, \ SEIMessageState *state) \ { \ return FUNC(name)(ctx, rw, cur, state); \ } \ static int FUNC(name) args #define SUBSCRIPTS(subs, ...) (subs > 0 ? ((int[subs + 1]){ subs, __VA_ARGS__ }) : NULL) #define u(width, name, range_min, range_max) \ xu(width, name, current->name, range_min, range_max, 0, ) #define flag(name) ub(1, name) #define ue(name, range_min, range_max) \ xue(name, current->name, range_min, range_max, 0, ) #define i(width, name, range_min, range_max) \ xi(width, name, current->name, range_min, range_max, 0, ) #define ib(width, name) \ xi(width, name, current->name, MIN_INT_BITS(width), MAX_INT_BITS(width), 0, ) #define se(name, range_min, range_max) \ xse(name, current->name, range_min, range_max, 0, ) #define us(width, name, range_min, range_max, subs, ...) \ xu(width, name, current->name, range_min, range_max, subs, __VA_ARGS__) #define ubs(width, name, subs, ...) \ xu(width, name, current->name, 0, MAX_UINT_BITS(width), subs, __VA_ARGS__) #define flags(name, subs, ...) \ xu(1, name, current->name, 0, 1, subs, __VA_ARGS__) #define ues(name, range_min, range_max, subs, ...) \ xue(name, current->name, range_min, range_max, subs, __VA_ARGS__) #define is(width, name, range_min, range_max, subs, ...) \ xi(width, name, current->name, range_min, range_max, subs, __VA_ARGS__) #define ibs(width, name, subs, ...) \ xi(width, name, current->name, MIN_INT_BITS(width), MAX_INT_BITS(width), subs, __VA_ARGS__) #define ses(name, range_min, range_max, subs, ...) \ xse(name, current->name, range_min, range_max, subs, __VA_ARGS__) #define fixed(width, name, value) do { \ av_unused uint32_t fixed_value = value; \ xu(width, name, fixed_value, value, value, 0, ); \ } while (0) #define READ #define READWRITE read #define RWContext GetBitContext #define ub(width, name) do { \ uint32_t value; \ CHECK(ff_cbs_read_simple_unsigned(ctx, rw, width, #name, \ &value)); \ current->name = value; \ } while (0) #define xu(width, name, var, range_min, range_max, subs, ...) do { \ uint32_t value; \ CHECK(ff_cbs_read_unsigned(ctx, rw, width, #name, \ SUBSCRIPTS(subs, __VA_ARGS__), \ &value, range_min, range_max)); \ var = value; \ } while (0) #define xue(name, var, range_min, range_max, subs, ...) do { \ uint32_t value; \ CHECK(cbs_read_ue_golomb(ctx, rw, #name, \ SUBSCRIPTS(subs, __VA_ARGS__), \ &value, range_min, range_max)); \ var = value; \ } while (0) #define xi(width, name, var, range_min, range_max, subs, ...) do { \ int32_t value; \ CHECK(ff_cbs_read_signed(ctx, rw, width, #name, \ SUBSCRIPTS(subs, __VA_ARGS__), \ &value, range_min, range_max)); \ var = value; \ } while (0) #define xse(name, var, range_min, range_max, subs, ...) do { \ int32_t value; \ CHECK(cbs_read_se_golomb(ctx, rw, #name, \ SUBSCRIPTS(subs, __VA_ARGS__), \ &value, range_min, range_max)); \ var = value; \ } while (0) #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 (bits_left == 0) return 0; if (show_bits(gbc, bits_left) & MAX_UINT_BITS(bits_left - 1)) return 1; return 0; } #define more_rbsp_data(var) ((var) = cbs_h2645_read_more_rbsp_data(rw)) #define bit_position(rw) (get_bits_count(rw)) #define byte_alignment(rw) (get_bits_count(rw) % 8) /* The CBS SEI code uses the refstruct API for the allocation * of its child buffers. */ #define allocate(name, size) do { \ name = ff_refstruct_allocz(size + \ AV_INPUT_BUFFER_PADDING_SIZE); \ if (!name) \ return AVERROR(ENOMEM); \ } while (0) #define FUNC(name) FUNC_SEI(name) #include "cbs_sei_syntax_template.c" #undef FUNC #undef allocate /* The other code uses the refstruct API for the allocation * of its child buffers. */ #define allocate(name, size) do { \ name ## _ref = av_buffer_allocz(size + \ AV_INPUT_BUFFER_PADDING_SIZE); \ if (!name ## _ref) \ return AVERROR(ENOMEM); \ name = name ## _ref->data; \ } while (0) #define FUNC(name) FUNC_H264(name) #include "cbs_h264_syntax_template.c" #undef FUNC #define FUNC(name) FUNC_H265(name) #include "cbs_h265_syntax_template.c" #undef FUNC #define FUNC(name) FUNC_H266(name) #include "cbs_h266_syntax_template.c" #undef FUNC #undef READ #undef READWRITE #undef RWContext #undef ub #undef xu #undef xi #undef xue #undef xse #undef infer #undef more_rbsp_data #undef bit_position #undef byte_alignment #undef allocate #define WRITE #define READWRITE write #define RWContext PutBitContext #define ub(width, name) do { \ uint32_t value = current->name; \ CHECK(ff_cbs_write_simple_unsigned(ctx, rw, width, #name, \ value)); \ } while (0) #define xu(width, name, var, range_min, range_max, subs, ...) do { \ uint32_t value = var; \ CHECK(ff_cbs_write_unsigned(ctx, rw, width, #name, \ SUBSCRIPTS(subs, __VA_ARGS__), \ value, range_min, range_max)); \ } while (0) #define xue(name, var, range_min, range_max, subs, ...) do { \ uint32_t value = var; \ CHECK(cbs_write_ue_golomb(ctx, rw, #name, \ SUBSCRIPTS(subs, __VA_ARGS__), \ value, range_min, range_max)); \ } while (0) #define xi(width, name, var, range_min, range_max, subs, ...) do { \ int32_t value = var; \ CHECK(ff_cbs_write_signed(ctx, rw, width, #name, \ SUBSCRIPTS(subs, __VA_ARGS__), \ value, range_min, range_max)); \ } while (0) #define xse(name, var, range_min, range_max, subs, ...) do { \ int32_t value = var; \ CHECK(cbs_write_se_golomb(ctx, rw, #name, \ SUBSCRIPTS(subs, __VA_ARGS__), \ value, range_min, range_max)); \ } while (0) #define infer(name, value) do { \ if (current->name != (value)) { \ av_log(ctx->log_ctx, AV_LOG_ERROR, \ "%s does not match inferred value: " \ "%"PRId64", but should be %"PRId64".\n", \ #name, (int64_t)current->name, (int64_t)(value)); \ return AVERROR_INVALIDDATA; \ } \ } while (0) #define more_rbsp_data(var) (var) #define bit_position(rw) (put_bits_count(rw)) #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_SEI(name) #include "cbs_sei_syntax_template.c" #undef FUNC #define FUNC(name) FUNC_H264(name) #include "cbs_h264_syntax_template.c" #undef FUNC #define FUNC(name) FUNC_H265(name) #include "cbs_h265_syntax_template.c" #undef FUNC #define FUNC(name) FUNC_H266(name) #include "cbs_h266_syntax_template.c" #undef FUNC #undef WRITE #undef READWRITE #undef RWContext #undef ub #undef xu #undef xi #undef xue #undef xse #undef u #undef i #undef flag #undef ue #undef se #undef infer #undef more_rbsp_data #undef bit_position #undef byte_alignment #undef allocate 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]; AVBufferRef *ref; size_t size = nal->size; enum AVCodecID codec_id = ctx->codec->codec_id; if (codec_id != AV_CODEC_ID_VVC && nal->nuh_layer_id > 0) continue; // Remove trailing zeroes. while (size > 0 && nal->data[size - 1] == 0) --size; if (size == 0) { av_log(ctx->log_ctx, AV_LOG_VERBOSE, "Discarding empty 0 NAL unit\n"); continue; } ref = (nal->data == nal->raw_data) ? frag->data_ref : packet->rbsp.rbsp_buffer_ref; err = ff_cbs_append_unit_data(frag, nal->type, (uint8_t*)nal->data, size, ref); if (err < 0) 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.\n", 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, 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, 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 if (header && frag->data[0] && codec_id == AV_CODEC_ID_HEVC) { // HVCC header. size_t size, start, end; int i, j, nb_arrays, nal_unit_type, nb_nals, version; priv->mp4 = 1; bytestream2_init(&gbc, frag->data, frag->data_size); if (bytestream2_get_bytes_left(&gbc) < 23) return AVERROR_INVALIDDATA; version = bytestream2_get_byte(&gbc); if (version != 1) { av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid HVCC header: " "first byte %u.\n", version); return AVERROR_INVALIDDATA; } bytestream2_skip(&gbc, 20); priv->nal_length_size = (bytestream2_get_byte(&gbc) & 3) + 1; nb_arrays = bytestream2_get_byte(&gbc); for (i = 0; i < nb_arrays; i++) { nal_unit_type = bytestream2_get_byte(&gbc) & 0x3f; nb_nals = bytestream2_get_be16(&gbc); start = bytestream2_tell(&gbc); for (j = 0; j < nb_nals; j++) { if (bytestream2_get_bytes_left(&gbc) < 2) 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_HEVC, 1, 1); if (err < 0) { av_log(ctx->log_ctx, AV_LOG_ERROR, "Failed to split " "HVCC array %d (%d NAL units of type %d).\n", i, nb_nals, nal_unit_type); return err; } err = cbs_h2645_fragment_add_nals(ctx, frag, &priv->read_packet); if (err < 0) return err; } } else if(header && frag->data[0] && codec_id == AV_CODEC_ID_VVC) { // VVCC header. int ptl_present_flag, num_arrays; int b, i, j; priv->mp4 = 1; bytestream2_init(&gbc, frag->data, frag->data_size); b = bytestream2_get_byte(&gbc); priv->nal_length_size = ((b >> 1) & 3) + 1; ptl_present_flag = b & 1; if(ptl_present_flag) { int num_sublayers, num_bytes_constraint_info, num_sub_profiles; num_sublayers = (bytestream2_get_be16u(&gbc) >> 4) & 7; bytestream2_skip(&gbc, 1); // begin VvcPTLRecord(num_sublayers); num_bytes_constraint_info = bytestream2_get_byte(&gbc) & 0x3f; bytestream2_skip(&gbc, 2 + num_bytes_constraint_info); if(num_sublayers > 1) { int count_present_flags = 0; b = bytestream2_get_byte(&gbc); for(i = num_sublayers - 2; i >= 0; i--) { if((b >> (7 - (num_sublayers - 2 - i))) & 0x01) count_present_flags++; } bytestream2_skip(&gbc, count_present_flags); } num_sub_profiles = bytestream2_get_byte(&gbc); bytestream2_skip(&gbc, num_sub_profiles * 4); // end VvcPTLRecord(num_sublayers); bytestream2_skip(&gbc, 3 * 2); } num_arrays = bytestream2_get_byte(&gbc); for(j = 0; j < num_arrays; j++) { size_t start, end, size; int nal_unit_type = bytestream2_get_byte(&gbc) & 0x1f; unsigned int num_nalus = 1; if(nal_unit_type != VVC_DCI_NUT && nal_unit_type != VVC_OPI_NUT) num_nalus = bytestream2_get_be16(&gbc); start = bytestream2_tell(&gbc); for(i = 0; i < num_nalus; i++) { size = bytestream2_get_be16(&gbc); 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_VVC, 1, 1); if (err < 0) { av_log(ctx->log_ctx, AV_LOG_ERROR, "Failed to split " "VVCC array %d (%d NAL units of type %d).\n", i, num_nalus, nal_unit_type); return err; } err = cbs_h2645_fragment_add_nals(ctx, frag, &priv->read_packet); if (err < 0) return err; } } 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, 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, \ CodedBitstreamUnit *unit) \ { \ CodedBitstreamH26 ## h26n ## Context *priv = ctx->priv_data; \ H26 ## h26n ## Raw ## ps_name *ps_var = unit->content; \ unsigned int id = ps_var->id_element; \ int err = ff_cbs_make_unit_refcounted(ctx, unit); \ if (err < 0) \ return err; \ if (priv->ps_var[id] == priv->active_ ## ps_var) \ priv->active_ ## ps_var = NULL ; \ av_assert0(unit->content_ref); \ ff_refstruct_replace(&priv->ps_var[id], unit->content_ref); \ return 0; \ } cbs_h2645_replace_ps(4, SPS, sps, seq_parameter_set_id) cbs_h2645_replace_ps(4, PPS, pps, pic_parameter_set_id) cbs_h2645_replace_ps(5, VPS, vps, vps_video_parameter_set_id) cbs_h2645_replace_ps(5, SPS, sps, sps_seq_parameter_set_id) cbs_h2645_replace_ps(5, PPS, pps, pps_pic_parameter_set_id) #define cbs_h266_replace_ps(h26n, ps_name, ps_var, id_element) \ static int cbs_h26 ## h26n ## _replace_ ## ps_var(CodedBitstreamContext *ctx, \ CodedBitstreamUnit *unit) \ { \ CodedBitstreamH26 ## h26n ## Context *priv = ctx->priv_data; \ H26 ## h26n ## Raw ## ps_name *ps_var = unit->content; \ unsigned int id = ps_var->id_element; \ int err = ff_cbs_make_unit_refcounted(ctx, unit); \ if (err < 0) \ return err; \ av_assert0(unit->content_ref); \ ff_refstruct_replace(&priv->ps_var[id], unit->content_ref); \ return 0; \ } cbs_h266_replace_ps(6, VPS, vps, vps_video_parameter_set_id) cbs_h266_replace_ps(6, SPS, sps, sps_seq_parameter_set_id) cbs_h266_replace_ps(6, PPS, pps, pps_pic_parameter_set_id) static int cbs_h266_replace_ph(CodedBitstreamContext *ctx, CodedBitstreamUnit *unit, H266RawPictureHeader *ph) { CodedBitstreamH266Context *h266 = ctx->priv_data; int err; err = ff_cbs_make_unit_refcounted(ctx, unit); if (err < 0) return err; av_assert0(unit->content_ref); ff_refstruct_replace(&h266->ph_ref, unit->content_ref); h266->ph = ph; return 0; } 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; err = ff_cbs_alloc_unit_content(ctx, unit); if (err < 0) return err; switch (unit->type) { case H264_NAL_SPS: { H264RawSPS *sps = unit->content; err = cbs_h264_read_sps(ctx, &gbc, sps); if (err < 0) return err; err = cbs_h264_replace_sps(ctx, unit); if (err < 0) return err; } break; case H264_NAL_SPS_EXT: { err = cbs_h264_read_sps_extension(ctx, &gbc, unit->content); if (err < 0) return err; } break; case H264_NAL_PPS: { H264RawPPS *pps = unit->content; err = cbs_h264_read_pps(ctx, &gbc, pps); if (err < 0) return err; err = cbs_h264_replace_pps(ctx, unit); if (err < 0) return err; } break; case H264_NAL_SLICE: case H264_NAL_IDR_SLICE: case H264_NAL_AUXILIARY_SLICE: { H264RawSlice *slice = unit->content; int pos, len; err = cbs_h264_read_slice_header(ctx, &gbc, &slice->header); if (err < 0) return err; if (!cbs_h2645_read_more_rbsp_data(&gbc)) return AVERROR_INVALIDDATA; pos = get_bits_count(&gbc); len = unit->data_size; slice->data_size = len - pos / 8; slice->data_ref = av_buffer_ref(unit->data_ref); if (!slice->data_ref) return AVERROR(ENOMEM); slice->data = unit->data + pos / 8; slice->data_bit_start = pos % 8; } break; case H264_NAL_AUD: { err = cbs_h264_read_aud(ctx, &gbc, unit->content); if (err < 0) return err; } break; case H264_NAL_SEI: { err = cbs_h264_read_sei(ctx, &gbc, unit->content); if (err < 0) return err; } break; case H264_NAL_FILLER_DATA: { err = cbs_h264_read_filler(ctx, &gbc, unit->content); if (err < 0) return err; } break; case H264_NAL_END_SEQUENCE: case H264_NAL_END_STREAM: { err = (unit->type == H264_NAL_END_SEQUENCE ? cbs_h264_read_end_of_sequence : cbs_h264_read_end_of_stream)(ctx, &gbc, unit->content); if (err < 0) return err; } break; default: return AVERROR(ENOSYS); } return 0; } static int cbs_h265_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; err = ff_cbs_alloc_unit_content(ctx, unit); if (err < 0) return err; switch (unit->type) { case HEVC_NAL_VPS: { H265RawVPS *vps = unit->content; err = cbs_h265_read_vps(ctx, &gbc, vps); if (err < 0) return err; err = cbs_h265_replace_vps(ctx, unit); if (err < 0) return err; } break; case HEVC_NAL_SPS: { H265RawSPS *sps = unit->content; err = cbs_h265_read_sps(ctx, &gbc, sps); if (err < 0) return err; err = cbs_h265_replace_sps(ctx, unit); if (err < 0) return err; } break; case HEVC_NAL_PPS: { H265RawPPS *pps = unit->content; err = cbs_h265_read_pps(ctx, &gbc, pps); if (err < 0) return err; err = cbs_h265_replace_pps(ctx, unit); if (err < 0) return err; } break; case HEVC_NAL_TRAIL_N: case HEVC_NAL_TRAIL_R: case HEVC_NAL_TSA_N: case HEVC_NAL_TSA_R: case HEVC_NAL_STSA_N: case HEVC_NAL_STSA_R: case HEVC_NAL_RADL_N: case HEVC_NAL_RADL_R: case HEVC_NAL_RASL_N: case HEVC_NAL_RASL_R: case HEVC_NAL_BLA_W_LP: case HEVC_NAL_BLA_W_RADL: case HEVC_NAL_BLA_N_LP: case HEVC_NAL_IDR_W_RADL: case HEVC_NAL_IDR_N_LP: case HEVC_NAL_CRA_NUT: { H265RawSlice *slice = unit->content; int pos, len; err = cbs_h265_read_slice_segment_header(ctx, &gbc, &slice->header); if (err < 0) return err; if (!cbs_h2645_read_more_rbsp_data(&gbc)) return AVERROR_INVALIDDATA; pos = get_bits_count(&gbc); len = unit->data_size; slice->data_size = len - pos / 8; slice->data_ref = av_buffer_ref(unit->data_ref); if (!slice->data_ref) return AVERROR(ENOMEM); slice->data = unit->data + pos / 8; slice->data_bit_start = pos % 8; } break; case HEVC_NAL_AUD: { err = cbs_h265_read_aud(ctx, &gbc, unit->content); if (err < 0) return err; } break; case HEVC_NAL_SEI_PREFIX: case HEVC_NAL_SEI_SUFFIX: { err = cbs_h265_read_sei(ctx, &gbc, unit->content, unit->type == HEVC_NAL_SEI_PREFIX); if (err < 0) return err; } break; default: return AVERROR(ENOSYS); } return 0; } static int cbs_h266_read_nal_unit(CodedBitstreamContext *ctx, CodedBitstreamUnit *unit) { GetBitContext gbc; int err; err = init_get_bits8(&gbc, unit->data, unit->data_size); if (err < 0) return err; err = ff_cbs_alloc_unit_content(ctx, unit); if (err < 0) return err; switch (unit->type) { case VVC_DCI_NUT: { err = cbs_h266_read_dci(ctx, &gbc, unit->content); if (err < 0) return err; } break; case VVC_OPI_NUT: { err = cbs_h266_read_opi(ctx, &gbc, unit->content); if (err < 0) return err; } break; case VVC_VPS_NUT: { H266RawVPS *vps = unit->content; err = cbs_h266_read_vps(ctx, &gbc, vps); if (err < 0) return err; err = cbs_h266_replace_vps(ctx, unit); if (err < 0) return err; } break; case VVC_SPS_NUT: { H266RawSPS *sps = unit->content; err = cbs_h266_read_sps(ctx, &gbc, sps); if (err < 0) return err; err = cbs_h266_replace_sps(ctx, unit); if (err < 0) return err; } break; case VVC_PPS_NUT: { H266RawPPS *pps = unit->content; err = cbs_h266_read_pps(ctx, &gbc, pps); if (err < 0) return err; err = cbs_h266_replace_pps(ctx, unit); if (err < 0) return err; } break; case VVC_PREFIX_APS_NUT: case VVC_SUFFIX_APS_NUT: { err = cbs_h266_read_aps(ctx, &gbc, unit->content, unit->type == VVC_PREFIX_APS_NUT); if (err < 0) return err; } break; case VVC_PH_NUT: { H266RawPH *ph = unit->content; err = cbs_h266_read_ph(ctx, &gbc, ph); if (err < 0) return err; err = cbs_h266_replace_ph(ctx, unit, &ph->ph_picture_header); if (err < 0) return err; } break; case VVC_TRAIL_NUT: case VVC_STSA_NUT: case VVC_RADL_NUT: case VVC_RASL_NUT: case VVC_IDR_W_RADL: case VVC_IDR_N_LP: case VVC_CRA_NUT: case VVC_GDR_NUT: { H266RawSlice *slice = unit->content; int pos, len; err = cbs_h266_read_slice_header(ctx, &gbc, &slice->header); if (err < 0) return err; if (!cbs_h2645_read_more_rbsp_data(&gbc)) return AVERROR_INVALIDDATA; pos = get_bits_count(&gbc); len = unit->data_size; if (slice->header.sh_picture_header_in_slice_header_flag) { err = cbs_h266_replace_ph(ctx, unit, &slice->header.sh_picture_header); if (err < 0) return err; } slice->header_size = pos / 8; slice->data_size = len - pos / 8; slice->data_ref = av_buffer_ref(unit->data_ref); if (!slice->data_ref) return AVERROR(ENOMEM); slice->data = unit->data + pos / 8; slice->data_bit_start = pos % 8; } break; case VVC_AUD_NUT: { err = cbs_h266_read_aud(ctx, &gbc, unit->content); if (err < 0) return err; } break; case VVC_PREFIX_SEI_NUT: case VVC_SUFFIX_SEI_NUT: { err = cbs_h266_read_sei(ctx, &gbc, unit->content, unit->type == VVC_PREFIX_SEI_NUT); if (err < 0) return err; } break; default: return AVERROR(ENOSYS); } return 0; } static int cbs_h2645_write_slice_data(CodedBitstreamContext *ctx, PutBitContext *pbc, const uint8_t *data, size_t data_size, int data_bit_start) { size_t rest = data_size - (data_bit_start + 7) / 8; const uint8_t *pos = data + data_bit_start / 8; av_assert0(data_bit_start >= 0 && data_size > data_bit_start / 8); if (data_size * 8 + 8 > put_bits_left(pbc)) return AVERROR(ENOSPC); if (!rest) goto rbsp_stop_one_bit; // First copy the remaining bits of the first byte // The above check ensures that we do not accidentally // copy beyond the rbsp_stop_one_bit. if (data_bit_start % 8) put_bits(pbc, 8 - data_bit_start % 8, *pos++ & MAX_UINT_BITS(8 - data_bit_start % 8)); if (put_bits_count(pbc) % 8 == 0) { // If the writer is aligned at this point, // memcpy can be used to improve performance. // This happens normally for CABAC. flush_put_bits(pbc); memcpy(put_bits_ptr(pbc), pos, rest); skip_put_bytes(pbc, rest); } else { // If not, we have to copy manually. // rbsp_stop_one_bit forces us to special-case // the last byte. uint8_t temp; int i; for (; rest > 4; rest -= 4, pos += 4) put_bits32(pbc, AV_RB32(pos)); for (; rest > 1; rest--, pos++) put_bits(pbc, 8, *pos); rbsp_stop_one_bit: temp = rest ? *pos : *pos & MAX_UINT_BITS(8 - data_bit_start % 8); av_assert0(temp); i = ff_ctz(*pos); temp = temp >> i; i = rest ? (8 - i) : (8 - i - data_bit_start % 8); put_bits(pbc, i, temp); if (put_bits_count(pbc) % 8) put_bits(pbc, 8 - put_bits_count(pbc) % 8, 0); } 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, unit); if (err < 0) return err; } break; case H264_NAL_SPS_EXT: { H264RawSPSExtension *sps_ext = unit->content; 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, unit); if (err < 0) return err; } break; case H264_NAL_SLICE: case H264_NAL_IDR_SLICE: case H264_NAL_AUXILIARY_SLICE: { H264RawSlice *slice = unit->content; err = cbs_h264_write_slice_header(ctx, pbc, &slice->header); if (err < 0) return err; if (slice->data) { err = cbs_h2645_write_slice_data(ctx, pbc, slice->data, slice->data_size, slice->data_bit_start); if (err < 0) return err; } 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; case H264_NAL_FILLER_DATA: { err = cbs_h264_write_filler(ctx, pbc, unit->content); if (err < 0) return err; } break; case H264_NAL_END_SEQUENCE: { err = cbs_h264_write_end_of_sequence(ctx, pbc, unit->content); if (err < 0) return err; } break; case H264_NAL_END_STREAM: { err = cbs_h264_write_end_of_stream(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_h265_write_nal_unit(CodedBitstreamContext *ctx, CodedBitstreamUnit *unit, PutBitContext *pbc) { int err; switch (unit->type) { case HEVC_NAL_VPS: { H265RawVPS *vps = unit->content; err = cbs_h265_write_vps(ctx, pbc, vps); if (err < 0) return err; err = cbs_h265_replace_vps(ctx, unit); if (err < 0) return err; } break; case HEVC_NAL_SPS: { H265RawSPS *sps = unit->content; err = cbs_h265_write_sps(ctx, pbc, sps); if (err < 0) return err; err = cbs_h265_replace_sps(ctx, unit); if (err < 0) return err; } break; case HEVC_NAL_PPS: { H265RawPPS *pps = unit->content; err = cbs_h265_write_pps(ctx, pbc, pps); if (err < 0) return err; err = cbs_h265_replace_pps(ctx, unit); if (err < 0) return err; } break; case HEVC_NAL_TRAIL_N: case HEVC_NAL_TRAIL_R: case HEVC_NAL_TSA_N: case HEVC_NAL_TSA_R: case HEVC_NAL_STSA_N: case HEVC_NAL_STSA_R: case HEVC_NAL_RADL_N: case HEVC_NAL_RADL_R: case HEVC_NAL_RASL_N: case HEVC_NAL_RASL_R: case HEVC_NAL_BLA_W_LP: case HEVC_NAL_BLA_W_RADL: case HEVC_NAL_BLA_N_LP: case HEVC_NAL_IDR_W_RADL: case HEVC_NAL_IDR_N_LP: case HEVC_NAL_CRA_NUT: { H265RawSlice *slice = unit->content; err = cbs_h265_write_slice_segment_header(ctx, pbc, &slice->header); if (err < 0) return err; if (slice->data) { err = cbs_h2645_write_slice_data(ctx, pbc, slice->data, slice->data_size, slice->data_bit_start); if (err < 0) return err; } else { // No slice data - that was just the header. } } break; case HEVC_NAL_AUD: { err = cbs_h265_write_aud(ctx, pbc, unit->content); if (err < 0) return err; } break; case HEVC_NAL_SEI_PREFIX: case HEVC_NAL_SEI_SUFFIX: { err = cbs_h265_write_sei(ctx, pbc, unit->content, unit->type == HEVC_NAL_SEI_PREFIX); 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_h264_discarded_nal_unit(CodedBitstreamContext *ctx, const CodedBitstreamUnit *unit, enum AVDiscard skip) { H264RawNALUnitHeader *header; H264RawSliceHeader *slice; int slice_type_i, slice_type_b, slice_type_si; if (skip <= AVDISCARD_DEFAULT) return 0; // keep non-VCL if (unit->type != H264_NAL_SLICE && unit->type != H264_NAL_IDR_SLICE && unit->type != H264_NAL_AUXILIARY_SLICE) return 0; if (skip >= AVDISCARD_ALL) return 1; if (skip >= AVDISCARD_NONKEY && unit->type != H264_NAL_IDR_SLICE) return 1; header = (H264RawNALUnitHeader *)unit->content; if (!header) { av_log(ctx->log_ctx, AV_LOG_WARNING, "h264 nal unit header is null, missing decompose?\n"); return 0; } if (skip >= AVDISCARD_NONREF && !header->nal_ref_idc) return 1; slice = (H264RawSliceHeader *)unit->content; if (!slice) { av_log(ctx->log_ctx, AV_LOG_WARNING, "h264 slice header is null, missing decompose?\n"); return 0; } slice_type_i = slice->slice_type % 5 == 2; slice_type_b = slice->slice_type % 5 == 1; slice_type_si = slice->slice_type % 5 == 4; if (skip >= AVDISCARD_BIDIR && slice_type_b) return 1; if (skip >= AVDISCARD_NONINTRA && !slice_type_i && !slice_type_si) return 1; return 0; } static int cbs_h265_discarded_nal_unit(CodedBitstreamContext *ctx, const CodedBitstreamUnit *unit, enum AVDiscard skip) { H265RawSliceHeader *slice; if (skip <= AVDISCARD_DEFAULT) return 0; switch (unit->type) { case HEVC_NAL_BLA_W_LP: case HEVC_NAL_BLA_W_RADL: case HEVC_NAL_BLA_N_LP: case HEVC_NAL_IDR_W_RADL: case HEVC_NAL_IDR_N_LP: case HEVC_NAL_CRA_NUT: // IRAP slice if (skip < AVDISCARD_ALL) return 0; break; case HEVC_NAL_TRAIL_R: case HEVC_NAL_TRAIL_N: case HEVC_NAL_TSA_N: case HEVC_NAL_TSA_R: case HEVC_NAL_STSA_N: case HEVC_NAL_STSA_R: case HEVC_NAL_RADL_N: case HEVC_NAL_RADL_R: case HEVC_NAL_RASL_N: case HEVC_NAL_RASL_R: // Slice break; default: // Don't discard non-slice nal. return 0; } if (skip >= AVDISCARD_NONKEY) return 1; slice = (H265RawSliceHeader *)unit->content; if (!slice) { av_log(ctx->log_ctx, AV_LOG_WARNING, "h265 slice header is null, missing decompose?\n"); return 0; } if (skip >= AVDISCARD_NONINTRA && slice->slice_type != HEVC_SLICE_I) return 1; if (skip >= AVDISCARD_BIDIR && slice->slice_type == HEVC_SLICE_B) return 1; if (skip >= AVDISCARD_NONREF) { switch (unit->type) { case HEVC_NAL_TRAIL_N: case HEVC_NAL_TSA_N: case HEVC_NAL_STSA_N: case HEVC_NAL_RADL_N: case HEVC_NAL_RASL_N: case HEVC_NAL_VCL_N10: case HEVC_NAL_VCL_N12: case HEVC_NAL_VCL_N14: // non-ref return 1; default: break; } } return 0; } static int cbs_h266_write_nal_unit(CodedBitstreamContext *ctx, CodedBitstreamUnit *unit, PutBitContext *pbc) { int err; switch (unit->type) { case VVC_DCI_NUT: { H266RawDCI *dci = unit->content; err = cbs_h266_write_dci(ctx, pbc, dci); if (err < 0) return err; } break; case VVC_OPI_NUT: { H266RawOPI *opi = unit->content; err = cbs_h266_write_opi(ctx, pbc, opi); if (err < 0) return err; } break; case VVC_VPS_NUT: { H266RawVPS *vps = unit->content; err = cbs_h266_write_vps(ctx, pbc, vps); if (err < 0) return err; err = cbs_h266_replace_vps(ctx, unit); if (err < 0) return err; } break; case VVC_SPS_NUT: { H266RawSPS *sps = unit->content; err = cbs_h266_write_sps(ctx, pbc, sps); if (err < 0) return err; err = cbs_h266_replace_sps(ctx, unit); if (err < 0) return err; } break; case VVC_PPS_NUT: { H266RawPPS *pps = unit->content; err = cbs_h266_write_pps(ctx, pbc, pps); if (err < 0) return err; err = cbs_h266_replace_pps(ctx, unit); if (err < 0) return err; } break; case VVC_PREFIX_APS_NUT: case VVC_SUFFIX_APS_NUT: { err = cbs_h266_write_aps(ctx, pbc, unit->content, unit->type == VVC_PREFIX_APS_NUT); if (err < 0) return err; } break; case VVC_PH_NUT: { H266RawPH *ph = unit->content; err = cbs_h266_write_ph(ctx, pbc, ph); if (err < 0) return err; err = cbs_h266_replace_ph(ctx, unit, &ph->ph_picture_header); if (err < 0) return err; } break; case VVC_TRAIL_NUT: case VVC_STSA_NUT: case VVC_RADL_NUT: case VVC_RASL_NUT: case VVC_IDR_W_RADL: case VVC_IDR_N_LP: case VVC_CRA_NUT: case VVC_GDR_NUT: { H266RawSlice *slice = unit->content; err = cbs_h266_write_slice_header(ctx, pbc, &slice->header); if (err < 0) return err; if (slice->header.sh_picture_header_in_slice_header_flag) { err = cbs_h266_replace_ph(ctx, unit, &slice->header.sh_picture_header); if (err < 0) return err; } if (slice->data) { err = cbs_h2645_write_slice_data(ctx, pbc, slice->data, slice->data_size, slice->data_bit_start); if (err < 0) return err; } else { // No slice data - that was just the header. } } break; case VVC_AUD_NUT: { err = cbs_h266_write_aud(ctx, pbc, unit->content); if (err < 0) return err; } break; case VVC_PREFIX_SEI_NUT: case VVC_SUFFIX_SEI_NUT: { err = cbs_h266_write_sei(ctx, pbc, unit->content, unit->type == VVC_PREFIX_SEI_NUT); 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_unit_requires_zero_byte(enum AVCodecID codec_id, CodedBitstreamUnitType type, int nal_unit_index) { // Section B.1.2 in H.264, section B.2.2 in H.265, H.266. if (nal_unit_index == 0) { // Assume that this is the first NAL unit in an access unit. return 1; } if (codec_id == AV_CODEC_ID_H264) return type == H264_NAL_SPS || type == H264_NAL_PPS; if (codec_id == AV_CODEC_ID_HEVC) return type == HEVC_NAL_VPS || type == HEVC_NAL_SPS || type == HEVC_NAL_PPS; if (codec_id == AV_CODEC_ID_VVC) return type >= VVC_OPI_NUT && type <= VVC_SUFFIX_APS_NUT; 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 += 4 + frag->units[i].data_size * 3 / 2; } data = av_realloc(NULL, max_size + AV_INPUT_BUFFER_PADDING_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 (cbs_h2645_unit_requires_zero_byte(ctx->codec->codec_id, unit->type, i)) { // 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 + AV_INPUT_BUFFER_PADDING_SIZE); if (err) return err; memset(data + dp, 0, AV_INPUT_BUFFER_PADDING_SIZE); frag->data_ref = av_buffer_create(data, dp + AV_INPUT_BUFFER_PADDING_SIZE, NULL, NULL, 0); if (!frag->data_ref) { av_freep(&data); return AVERROR(ENOMEM); } frag->data = data; frag->data_size = dp; return 0; } static void cbs_h264_flush(CodedBitstreamContext *ctx) { CodedBitstreamH264Context *h264 = ctx->priv_data; for (int i = 0; i < FF_ARRAY_ELEMS(h264->sps); i++) ff_refstruct_unref(&h264->sps[i]); for (int i = 0; i < FF_ARRAY_ELEMS(h264->pps); i++) ff_refstruct_unref(&h264->pps[i]); h264->active_sps = NULL; h264->active_pps = NULL; h264->last_slice_nal_unit_type = 0; } static void cbs_h264_close(CodedBitstreamContext *ctx) { CodedBitstreamH264Context *h264 = ctx->priv_data; int i; ff_h2645_packet_uninit(&h264->common.read_packet); for (i = 0; i < FF_ARRAY_ELEMS(h264->sps); i++) ff_refstruct_unref(&h264->sps[i]); for (i = 0; i < FF_ARRAY_ELEMS(h264->pps); i++) ff_refstruct_unref(&h264->pps[i]); } static void cbs_h265_flush(CodedBitstreamContext *ctx) { CodedBitstreamH265Context *h265 = ctx->priv_data; for (int i = 0; i < FF_ARRAY_ELEMS(h265->vps); i++) ff_refstruct_unref(&h265->vps[i]); for (int i = 0; i < FF_ARRAY_ELEMS(h265->sps); i++) ff_refstruct_unref(&h265->sps[i]); for (int i = 0; i < FF_ARRAY_ELEMS(h265->pps); i++) ff_refstruct_unref(&h265->pps[i]); h265->active_vps = NULL; h265->active_sps = NULL; h265->active_pps = NULL; } static void cbs_h265_close(CodedBitstreamContext *ctx) { CodedBitstreamH265Context *h265 = ctx->priv_data; int i; ff_h2645_packet_uninit(&h265->common.read_packet); for (i = 0; i < FF_ARRAY_ELEMS(h265->vps); i++) ff_refstruct_unref(&h265->vps[i]); for (i = 0; i < FF_ARRAY_ELEMS(h265->sps); i++) ff_refstruct_unref(&h265->sps[i]); for (i = 0; i < FF_ARRAY_ELEMS(h265->pps); i++) ff_refstruct_unref(&h265->pps[i]); } static void cbs_h266_flush(CodedBitstreamContext *ctx) { CodedBitstreamH266Context *h266 = ctx->priv_data; for (int i = 0; i < FF_ARRAY_ELEMS(h266->vps); i++) ff_refstruct_unref(&h266->vps[i]); for (int i = 0; i < FF_ARRAY_ELEMS(h266->sps); i++) ff_refstruct_unref(&h266->sps[i]); for (int i = 0; i < FF_ARRAY_ELEMS(h266->pps); i++) ff_refstruct_unref(&h266->pps[i]); ff_refstruct_unref(&h266->ph_ref); } static void cbs_h266_close(CodedBitstreamContext *ctx) { CodedBitstreamH266Context *h266 = ctx->priv_data; cbs_h266_flush(ctx); ff_h2645_packet_uninit(&h266->common.read_packet); } static void cbs_h264_free_sei(FFRefStructOpaque unused, void *content) { H264RawSEI *sei = content; ff_cbs_sei_free_message_list(&sei->message_list); } static const CodedBitstreamUnitTypeDescriptor cbs_h264_unit_types[] = { CBS_UNIT_TYPE_POD(H264_NAL_SPS, H264RawSPS), CBS_UNIT_TYPE_POD(H264_NAL_SPS_EXT, H264RawSPSExtension), CBS_UNIT_TYPE_INTERNAL_REF(H264_NAL_PPS, H264RawPPS, slice_group_id), CBS_UNIT_TYPES_INTERNAL_REF((H264_NAL_IDR_SLICE, H264_NAL_SLICE, H264_NAL_AUXILIARY_SLICE), H264RawSlice, data), CBS_UNIT_TYPE_POD(H264_NAL_AUD, H264RawAUD), CBS_UNIT_TYPE_POD(H264_NAL_FILLER_DATA, H264RawFiller), CBS_UNIT_TYPE_POD(H264_NAL_END_SEQUENCE, H264RawNALUnitHeader), CBS_UNIT_TYPE_POD(H264_NAL_END_STREAM, H264RawNALUnitHeader), CBS_UNIT_TYPE_COMPLEX(H264_NAL_SEI, H264RawSEI, &cbs_h264_free_sei), CBS_UNIT_TYPE_END_OF_LIST }; static void cbs_h265_free_sei(FFRefStructOpaque unused, void *content) { H265RawSEI *sei = content; ff_cbs_sei_free_message_list(&sei->message_list); } static const CodedBitstreamUnitTypeDescriptor cbs_h265_unit_types[] = { CBS_UNIT_TYPE_INTERNAL_REF(HEVC_NAL_VPS, H265RawVPS, extension_data.data), CBS_UNIT_TYPE_INTERNAL_REF(HEVC_NAL_SPS, H265RawSPS, extension_data.data), CBS_UNIT_TYPE_INTERNAL_REF(HEVC_NAL_PPS, H265RawPPS, extension_data.data), CBS_UNIT_TYPE_POD(HEVC_NAL_AUD, H265RawAUD), // Slices of non-IRAP pictures. CBS_UNIT_RANGE_INTERNAL_REF(HEVC_NAL_TRAIL_N, HEVC_NAL_RASL_R, H265RawSlice, data), // Slices of IRAP pictures. CBS_UNIT_RANGE_INTERNAL_REF(HEVC_NAL_BLA_W_LP, HEVC_NAL_CRA_NUT, H265RawSlice, data), CBS_UNIT_TYPES_COMPLEX((HEVC_NAL_SEI_PREFIX, HEVC_NAL_SEI_SUFFIX), H265RawSEI, cbs_h265_free_sei), CBS_UNIT_TYPE_END_OF_LIST }; static void cbs_h266_free_sei(FFRefStructOpaque unused, void *content) { H266RawSEI *sei = content; ff_cbs_sei_free_message_list(&sei->message_list); } static const CodedBitstreamUnitTypeDescriptor cbs_h266_unit_types[] = { CBS_UNIT_TYPE_INTERNAL_REF(VVC_DCI_NUT, H266RawDCI, extension_data.data), CBS_UNIT_TYPE_INTERNAL_REF(VVC_OPI_NUT, H266RawOPI, extension_data.data), CBS_UNIT_TYPE_INTERNAL_REF(VVC_VPS_NUT, H266RawVPS, extension_data.data), { .nb_unit_types = 1, .unit_type.list[0] = VVC_SPS_NUT, .content_type = CBS_CONTENT_TYPE_INTERNAL_REFS, .content_size = sizeof(H266RawSPS), .type.ref = { .nb_offsets = 2, .offsets = { offsetof(H266RawSPS, extension_data.data), offsetof(H266RawSPS, vui.extension_data.data) } }, }, CBS_UNIT_TYPE_INTERNAL_REF(VVC_PPS_NUT, H266RawPPS, extension_data.data), CBS_UNIT_TYPE_INTERNAL_REF(VVC_PREFIX_APS_NUT, H266RawAPS, extension_data.data), CBS_UNIT_TYPE_INTERNAL_REF(VVC_SUFFIX_APS_NUT, H266RawAPS, extension_data.data), CBS_UNIT_TYPE_POD(VVC_PH_NUT , H266RawPH), CBS_UNIT_TYPE_POD(VVC_AUD_NUT, H266RawAUD), CBS_UNIT_RANGE_INTERNAL_REF(VVC_TRAIL_NUT, VVC_RASL_NUT, H266RawSlice, data), CBS_UNIT_RANGE_INTERNAL_REF(VVC_IDR_W_RADL, VVC_GDR_NUT, H266RawSlice, data), CBS_UNIT_TYPES_COMPLEX((VVC_PREFIX_SEI_NUT, VVC_SUFFIX_SEI_NUT), H266RawSEI, cbs_h266_free_sei), CBS_UNIT_TYPE_END_OF_LIST }; const CodedBitstreamType ff_cbs_type_h264 = { .codec_id = AV_CODEC_ID_H264, .priv_data_size = sizeof(CodedBitstreamH264Context), .unit_types = cbs_h264_unit_types, .split_fragment = &cbs_h2645_split_fragment, .read_unit = &cbs_h264_read_nal_unit, .write_unit = &cbs_h264_write_nal_unit, .discarded_unit = &cbs_h264_discarded_nal_unit, .assemble_fragment = &cbs_h2645_assemble_fragment, .flush = &cbs_h264_flush, .close = &cbs_h264_close, }; const CodedBitstreamType ff_cbs_type_h265 = { .codec_id = AV_CODEC_ID_HEVC, .priv_data_size = sizeof(CodedBitstreamH265Context), .unit_types = cbs_h265_unit_types, .split_fragment = &cbs_h2645_split_fragment, .read_unit = &cbs_h265_read_nal_unit, .write_unit = &cbs_h265_write_nal_unit, .discarded_unit = &cbs_h265_discarded_nal_unit, .assemble_fragment = &cbs_h2645_assemble_fragment, .flush = &cbs_h265_flush, .close = &cbs_h265_close, }; const CodedBitstreamType ff_cbs_type_h266 = { .codec_id = AV_CODEC_ID_VVC, .priv_data_size = sizeof(CodedBitstreamH266Context), .unit_types = cbs_h266_unit_types, .split_fragment = &cbs_h2645_split_fragment, .read_unit = &cbs_h266_read_nal_unit, .write_unit = &cbs_h266_write_nal_unit, .assemble_fragment = &cbs_h2645_assemble_fragment, .flush = &cbs_h266_flush, .close = &cbs_h266_close, }; // Macro for the read/write pair. #define SEI_MESSAGE_RW(codec, name) \ .read = cbs_ ## codec ## _read_ ## name ## _internal, \ .write = cbs_ ## codec ## _write_ ## name ## _internal static const SEIMessageTypeDescriptor cbs_sei_common_types[] = { { SEI_TYPE_FILLER_PAYLOAD, 1, 1, sizeof(SEIRawFillerPayload), SEI_MESSAGE_RW(sei, filler_payload), }, { SEI_TYPE_USER_DATA_REGISTERED_ITU_T_T35, 1, 1, sizeof(SEIRawUserDataRegistered), SEI_MESSAGE_RW(sei, user_data_registered), }, { SEI_TYPE_USER_DATA_UNREGISTERED, 1, 1, sizeof(SEIRawUserDataUnregistered), SEI_MESSAGE_RW(sei, user_data_unregistered), }, { SEI_TYPE_MASTERING_DISPLAY_COLOUR_VOLUME, 1, 0, sizeof(SEIRawMasteringDisplayColourVolume), SEI_MESSAGE_RW(sei, mastering_display_colour_volume), }, { SEI_TYPE_CONTENT_LIGHT_LEVEL_INFO, 1, 0, sizeof(SEIRawContentLightLevelInfo), SEI_MESSAGE_RW(sei, content_light_level_info), }, { SEI_TYPE_ALTERNATIVE_TRANSFER_CHARACTERISTICS, 1, 0, sizeof(SEIRawAlternativeTransferCharacteristics), SEI_MESSAGE_RW(sei, alternative_transfer_characteristics), }, { SEI_TYPE_AMBIENT_VIEWING_ENVIRONMENT, 1, 0, sizeof(SEIRawAmbientViewingEnvironment), SEI_MESSAGE_RW(sei, ambient_viewing_environment), }, SEI_MESSAGE_TYPE_END, }; static const SEIMessageTypeDescriptor cbs_sei_h264_types[] = { { SEI_TYPE_BUFFERING_PERIOD, 1, 0, sizeof(H264RawSEIBufferingPeriod), SEI_MESSAGE_RW(h264, sei_buffering_period), }, { SEI_TYPE_PIC_TIMING, 1, 0, sizeof(H264RawSEIPicTiming), SEI_MESSAGE_RW(h264, sei_pic_timing), }, { SEI_TYPE_PAN_SCAN_RECT, 1, 0, sizeof(H264RawSEIPanScanRect), SEI_MESSAGE_RW(h264, sei_pan_scan_rect), }, { SEI_TYPE_RECOVERY_POINT, 1, 0, sizeof(H264RawSEIRecoveryPoint), SEI_MESSAGE_RW(h264, sei_recovery_point), }, { SEI_TYPE_FILM_GRAIN_CHARACTERISTICS, 1, 0, sizeof(H264RawFilmGrainCharacteristics), SEI_MESSAGE_RW(h264, film_grain_characteristics), }, { SEI_TYPE_DISPLAY_ORIENTATION, 1, 0, sizeof(H264RawSEIDisplayOrientation), SEI_MESSAGE_RW(h264, sei_display_orientation), }, SEI_MESSAGE_TYPE_END }; static const SEIMessageTypeDescriptor cbs_sei_h265_types[] = { { SEI_TYPE_BUFFERING_PERIOD, 1, 0, sizeof(H265RawSEIBufferingPeriod), SEI_MESSAGE_RW(h265, sei_buffering_period), }, { SEI_TYPE_PIC_TIMING, 1, 0, sizeof(H265RawSEIPicTiming), SEI_MESSAGE_RW(h265, sei_pic_timing), }, { SEI_TYPE_PAN_SCAN_RECT, 1, 0, sizeof(H265RawSEIPanScanRect), SEI_MESSAGE_RW(h265, sei_pan_scan_rect), }, { SEI_TYPE_RECOVERY_POINT, 1, 0, sizeof(H265RawSEIRecoveryPoint), SEI_MESSAGE_RW(h265, sei_recovery_point), }, { SEI_TYPE_FILM_GRAIN_CHARACTERISTICS, 1, 0, sizeof(H265RawFilmGrainCharacteristics), SEI_MESSAGE_RW(h265, film_grain_characteristics), }, { SEI_TYPE_DISPLAY_ORIENTATION, 1, 0, sizeof(H265RawSEIDisplayOrientation), SEI_MESSAGE_RW(h265, sei_display_orientation), }, { SEI_TYPE_ACTIVE_PARAMETER_SETS, 1, 0, sizeof(H265RawSEIActiveParameterSets), SEI_MESSAGE_RW(h265, sei_active_parameter_sets), }, { SEI_TYPE_DECODED_PICTURE_HASH, 0, 1, sizeof(H265RawSEIDecodedPictureHash), SEI_MESSAGE_RW(h265, sei_decoded_picture_hash), }, { SEI_TYPE_TIME_CODE, 1, 0, sizeof(H265RawSEITimeCode), SEI_MESSAGE_RW(h265, sei_time_code), }, { SEI_TYPE_ALPHA_CHANNEL_INFO, 1, 0, sizeof(H265RawSEIAlphaChannelInfo), SEI_MESSAGE_RW(h265, sei_alpha_channel_info), }, SEI_MESSAGE_TYPE_END }; static const SEIMessageTypeDescriptor cbs_sei_h266_types[] = { { SEI_TYPE_DECODED_PICTURE_HASH, 0, 1, sizeof(H266RawSEIDecodedPictureHash), SEI_MESSAGE_RW(h266, sei_decoded_picture_hash), }, SEI_MESSAGE_TYPE_END }; const SEIMessageTypeDescriptor *ff_cbs_sei_find_type(CodedBitstreamContext *ctx, int payload_type) { const SEIMessageTypeDescriptor *codec_list; int i; for (i = 0; cbs_sei_common_types[i].type >= 0; i++) { if (cbs_sei_common_types[i].type == payload_type) return &cbs_sei_common_types[i]; } switch (ctx->codec->codec_id) { case AV_CODEC_ID_H264: codec_list = cbs_sei_h264_types; break; case AV_CODEC_ID_H265: codec_list = cbs_sei_h265_types; break; case AV_CODEC_ID_H266: codec_list = cbs_sei_h266_types; break; default: return NULL; } for (i = 0; codec_list[i].type >= 0; i++) { if (codec_list[i].type == payload_type) return &codec_list[i]; } return NULL; }