2 * This file is part of FFmpeg.
4 * FFmpeg is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
9 * FFmpeg is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with FFmpeg; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 static int FUNC(filler_payload)
20 (CodedBitstreamContext *ctx, RWContext *rw,
21 SEIRawFillerPayload *current, SEIMessageState *state)
25 HEADER("Filler Payload");
28 current->payload_size = state->payload_size;
31 for (i = 0; i < current->payload_size; i++)
32 fixed(8, ff_byte, 0xff);
37 static int FUNC(user_data_registered)
38 (CodedBitstreamContext *ctx, RWContext *rw,
39 SEIRawUserDataRegistered *current, SEIMessageState *state)
43 HEADER("User Data Registered ITU-T T.35");
45 u(8, itu_t_t35_country_code, 0x00, 0xff);
46 if (current->itu_t_t35_country_code != 0xff)
49 u(8, itu_t_t35_country_code_extension_byte, 0x00, 0xff);
54 if (state->payload_size < i) {
55 av_log(ctx->log_ctx, AV_LOG_ERROR,
56 "Invalid SEI user data registered payload.\n");
57 return AVERROR_INVALIDDATA;
59 current->data_length = state->payload_size - i;
62 allocate(current->data, current->data_length);
63 for (j = 0; j < current->data_length; j++)
64 xu(8, itu_t_t35_payload_byte[], current->data[j], 0x00, 0xff, 1, i + j);
69 static int FUNC(user_data_unregistered)
70 (CodedBitstreamContext *ctx, RWContext *rw,
71 SEIRawUserDataUnregistered *current, SEIMessageState *state)
75 HEADER("User Data Unregistered");
78 if (state->payload_size < 16) {
79 av_log(ctx->log_ctx, AV_LOG_ERROR,
80 "Invalid SEI user data unregistered payload.\n");
81 return AVERROR_INVALIDDATA;
83 current->data_length = state->payload_size - 16;
86 for (i = 0; i < 16; i++)
87 us(8, uuid_iso_iec_11578[i], 0x00, 0xff, 1, i);
89 allocate(current->data, current->data_length);
91 for (i = 0; i < current->data_length; i++)
92 xu(8, user_data_payload_byte[i], current->data[i], 0x00, 0xff, 1, i);
97 static int FUNC(mastering_display_colour_volume)
98 (CodedBitstreamContext *ctx, RWContext *rw,
99 SEIRawMasteringDisplayColourVolume *current, SEIMessageState *state)
103 HEADER("Mastering Display Colour Volume");
105 for (c = 0; c < 3; c++) {
106 us(16, display_primaries_x[c], 0, 50000, 1, c);
107 us(16, display_primaries_y[c], 0, 50000, 1, c);
110 u(16, white_point_x, 0, 50000);
111 u(16, white_point_y, 0, 50000);
113 u(32, max_display_mastering_luminance,
114 1, MAX_UINT_BITS(32));
115 u(32, min_display_mastering_luminance,
116 0, current->max_display_mastering_luminance - 1);
121 static int FUNC(content_light_level_info)
122 (CodedBitstreamContext *ctx, RWContext *rw,
123 SEIRawContentLightLevelInfo *current, SEIMessageState *state)
127 HEADER("Content Light Level Information");
129 ub(16, max_content_light_level);
130 ub(16, max_pic_average_light_level);
135 static int FUNC(alternative_transfer_characteristics)
136 (CodedBitstreamContext *ctx, RWContext *rw,
137 SEIRawAlternativeTransferCharacteristics *current,
138 SEIMessageState *state)
142 HEADER("Alternative Transfer Characteristics");
144 ub(8, preferred_transfer_characteristics);
149 static int FUNC(message)(CodedBitstreamContext *ctx, RWContext *rw,
150 SEIRawMessage *current)
152 const SEIMessageTypeDescriptor *desc;
155 desc = ff_cbs_sei_find_type(ctx, current->payload_type);
157 SEIMessageState state = {
158 .payload_type = current->payload_type,
159 .payload_size = current->payload_size,
160 .extension_present = current->extension_bit_length > 0,
162 int start_position, current_position, bits_written;
165 CHECK(ff_cbs_sei_alloc_message_payload(current, desc));
168 start_position = bit_position(rw);
170 CHECK(desc->READWRITE(ctx, rw, current->payload, &state));
172 current_position = bit_position(rw);
173 bits_written = current_position - start_position;
175 if (byte_alignment(rw) || state.extension_present ||
176 bits_written < 8 * current->payload_size) {
180 GetBitContext tmp = *rw;
181 int trailing_bits, trailing_zero_bits;
183 bits_left = 8 * current->payload_size - bits_written;
185 skip_bits_long(&tmp, bits_left - 8);
186 trailing_bits = get_bits(&tmp, FFMIN(bits_left, 8));
187 if (trailing_bits == 0) {
188 // The trailing bits must contain a bit_equal_to_one, so
189 // they can't all be zero.
190 return AVERROR_INVALIDDATA;
192 trailing_zero_bits = ff_ctz(trailing_bits);
193 current->extension_bit_length =
194 bits_left - 1 - trailing_zero_bits;
197 if (current->extension_bit_length > 0) {
198 allocate(current->extension_data,
199 (current->extension_bit_length + 7) / 8);
201 bits_left = current->extension_bit_length;
202 for (i = 0; bits_left > 0; i++) {
203 int length = FFMIN(bits_left, 8);
204 xu(length, reserved_payload_extension_data,
205 current->extension_data[i],
206 0, MAX_UINT_BITS(length), 0);
211 fixed(1, bit_equal_to_one, 1);
212 while (byte_alignment(rw))
213 fixed(1, bit_equal_to_zero, 0);
217 current->payload_size = (put_bits_count(rw) - start_position) / 8;
222 allocate(current->payload, current->payload_size);
223 data = current->payload;
225 for (i = 0; i < current->payload_size; i++)
226 xu(8, payload_byte[i], data[i], 0, 255, 1, i);
232 static int FUNC(message_list)(CodedBitstreamContext *ctx, RWContext *rw,
233 SEIRawMessageList *current, int prefix)
235 SEIRawMessage *message;
240 uint32_t payload_type = 0;
241 uint32_t payload_size = 0;
244 while (show_bits(rw, 8) == 0xff) {
245 fixed(8, ff_byte, 0xff);
248 xu(8, last_payload_type_byte, tmp, 0, 254, 0);
251 while (show_bits(rw, 8) == 0xff) {
252 fixed(8, ff_byte, 0xff);
255 xu(8, last_payload_size_byte, tmp, 0, 254, 0);
258 CHECK(ff_cbs_sei_list_add(current));
259 message = ¤t->messages[k];
261 message->payload_type = payload_type;
262 message->payload_size = payload_size;
264 CHECK(FUNC(message)(ctx, rw, message));
266 if (!cbs_h2645_read_more_rbsp_data(rw))
270 for (k = 0; k < current->nb_messages; k++) {
271 PutBitContext start_state;
275 message = ¤t->messages[k];
277 // We write the payload twice in order to find the size. Trace
278 // output is switched off for the first write.
279 trace = ctx->trace_enable;
280 ctx->trace_enable = 0;
283 for (i = 0; i < 2; i++) {
286 tmp = message->payload_type;
288 fixed(8, ff_byte, 0xff);
291 xu(8, last_payload_type_byte, tmp, 0, 254, 0);
293 tmp = message->payload_size;
295 fixed(8, ff_byte, 0xff);
298 xu(8, last_payload_size_byte, tmp, 0, 254, 0);
300 err = FUNC(message)(ctx, rw, message);
301 ctx->trace_enable = trace;