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ffmpeg/libavcodec/cbs_sei_syntax_template.c

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/*
* 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
*/
SEI_FUNC(filler_payload, (CodedBitstreamContext *ctx, RWContext *rw,
SEIRawFillerPayload *current,
SEIMessageState *state))
{
int err, i;
HEADER("Filler Payload");
#ifdef READ
current->payload_size = state->payload_size;
#endif
for (i = 0; i < current->payload_size; i++)
fixed(8, ff_byte, 0xff);
return 0;
}
SEI_FUNC(user_data_registered, (CodedBitstreamContext *ctx, RWContext *rw,
SEIRawUserDataRegistered *current,
SEIMessageState *state))
{
int err, i, j;
HEADER("User Data Registered ITU-T T.35");
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 (state->payload_size < i) {
av_log(ctx->log_ctx, AV_LOG_ERROR,
"Invalid SEI user data registered payload.\n");
return AVERROR_INVALIDDATA;
}
current->data_length = state->payload_size - i;
#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, 1, i + j);
return 0;
}
SEI_FUNC(user_data_unregistered, (CodedBitstreamContext *ctx, RWContext *rw,
SEIRawUserDataUnregistered *current,
SEIMessageState *state))
{
int err, i;
HEADER("User Data Unregistered");
#ifdef READ
if (state->payload_size < 16) {
av_log(ctx->log_ctx, AV_LOG_ERROR,
"Invalid SEI user data unregistered payload.\n");
return AVERROR_INVALIDDATA;
}
current->data_length = state->payload_size - 16;
#endif
for (i = 0; i < 16; i++)
us(8, uuid_iso_iec_11578[i], 0x00, 0xff, 1, i);
allocate(current->data, current->data_length);
for (i = 0; i < current->data_length; i++)
xu(8, user_data_payload_byte[i], current->data[i], 0x00, 0xff, 1, i);
return 0;
}
SEI_FUNC(frame_packing_arrangement, (CodedBitstreamContext *ctx, RWContext *rw,
SEIRawFramePackingArrangement *current,
SEIMessageState *unused))
{
int err;
HEADER("Frame Packing Arrangement");
ue(fp_arrangement_id, 0, MAX_UINT_BITS(31));
flag(fp_arrangement_cancel_flag);
if (!current->fp_arrangement_cancel_flag) {
u(7, fp_arrangement_type, 3, 5);
flag(fp_quincunx_sampling_flag);
u(6, fp_content_interpretation_type, 0, 2);
flag(fp_spatial_flipping_flag);
flag(fp_frame0_flipped_flag);
flag(fp_field_views_flag);
flag(fp_current_frame_is_frame0_flag);
flag(fp_frame0_self_contained_flag);
flag(fp_frame1_self_contained_flag);
if (!current->fp_quincunx_sampling_flag && current->fp_arrangement_type != 5) {
ub(4, fp_frame0_grid_position_x);
ub(4, fp_frame0_grid_position_y);
ub(4, fp_frame1_grid_position_x);
ub(4, fp_frame1_grid_position_y);
}
fixed(8, fp_arrangement_reserved_byte, 0);
flag(fp_arrangement_persistence_flag);
}
flag(fp_upsampled_aspect_ratio_flag);
return 0;
}
SEI_FUNC(decoded_picture_hash, (CodedBitstreamContext *ctx,
RWContext *rw,
SEIRawDecodedPictureHash *current,
SEIMessageState *unused))
{
int err, c_idx, i;
HEADER("Decoded Picture Hash");
u(8, dph_sei_hash_type, 0, 2);
flag(dph_sei_single_component_flag);
ub(7, dph_sei_reserved_zero_7bits);
for (c_idx = 0; c_idx < (current->dph_sei_single_component_flag ? 1 : 3);
c_idx++) {
if (current->dph_sei_hash_type == 0) {
for (i = 0; i < 16; i++)
us(8, dph_sei_picture_md5[c_idx][i], 0x00, 0xff, 2, c_idx, i);
} else if (current->dph_sei_hash_type == 1) {
us(16, dph_sei_picture_crc[c_idx], 0x0000, 0xffff, 1, c_idx);
} else if (current->dph_sei_hash_type == 2) {
us(32, dph_sei_picture_checksum[c_idx], 0x00000000, 0xffffffff, 1,
c_idx);
}
}
return 0;
}
SEI_FUNC(mastering_display_colour_volume,
(CodedBitstreamContext *ctx, RWContext *rw,
SEIRawMasteringDisplayColourVolume *current,
SEIMessageState *state))
{
int err, c;
HEADER("Mastering Display Colour Volume");
for (c = 0; c < 3; c++) {
ubs(16, display_primaries_x[c], 1, c);
ubs(16, display_primaries_y[c], 1, c);
}
ub(16, white_point_x);
ub(16, white_point_y);
ub(32, max_display_mastering_luminance);
ub(32, min_display_mastering_luminance);
return 0;
}
SEI_FUNC(content_light_level_info, (CodedBitstreamContext *ctx, RWContext *rw,
SEIRawContentLightLevelInfo *current,
SEIMessageState *state))
{
int err;
HEADER("Content Light Level Information");
ub(16, max_content_light_level);
ub(16, max_pic_average_light_level);
return 0;
}
SEI_FUNC(alternative_transfer_characteristics,
(CodedBitstreamContext *ctx, RWContext *rw,
SEIRawAlternativeTransferCharacteristics *current,
SEIMessageState *state))
{
int err;
HEADER("Alternative Transfer Characteristics");
ub(8, preferred_transfer_characteristics);
return 0;
}
SEI_FUNC(ambient_viewing_environment,
(CodedBitstreamContext *ctx, RWContext *rw,
SEIRawAmbientViewingEnvironment *current,
SEIMessageState *state))
{
static const uint16_t max_ambient_light_value = 50000;
int err;
HEADER("Ambient Viewing Environment");
u(32, ambient_illuminance, 1, MAX_UINT_BITS(32));
u(16, ambient_light_x, 0, max_ambient_light_value);
u(16, ambient_light_y, 0, max_ambient_light_value);
return 0;
}
static int FUNC(message)(CodedBitstreamContext *ctx, RWContext *rw,
SEIRawMessage *current)
{
const SEIMessageTypeDescriptor *desc;
int err, i;
desc = ff_cbs_sei_find_type(ctx, current->payload_type);
if (desc) {
SEIMessageState state = {
.payload_type = current->payload_type,
.payload_size = current->payload_size,
.extension_present = current->extension_bit_length > 0,
};
int start_position, current_position, bits_written;
#ifdef READ
CHECK(ff_cbs_sei_alloc_message_payload(current, desc));
#endif
start_position = bit_position(rw);
CHECK(desc->READWRITE(ctx, rw, current->payload, &state));
current_position = bit_position(rw);
bits_written = current_position - start_position;
if (byte_alignment(rw) || state.extension_present ||
bits_written < 8 * current->payload_size) {
size_t bits_left;
#ifdef READ
GetBitContext tmp = *rw;
int trailing_bits, trailing_zero_bits;
bits_left = 8 * current->payload_size - bits_written;
if (bits_left > 8)
skip_bits_long(&tmp, bits_left - 8);
trailing_bits = get_bits(&tmp, FFMIN(bits_left, 8));
if (trailing_bits == 0) {
// The trailing bits must contain a bit_equal_to_one, so
// they can't all be zero.
return AVERROR_INVALIDDATA;
}
trailing_zero_bits = ff_ctz(trailing_bits);
current->extension_bit_length =
bits_left - 1 - trailing_zero_bits;
#endif
if (current->extension_bit_length > 0) {
allocate(current->extension_data,
(current->extension_bit_length + 7) / 8);
bits_left = current->extension_bit_length;
for (i = 0; bits_left > 0; i++) {
int length = FFMIN(bits_left, 8);
xu(length, reserved_payload_extension_data,
current->extension_data[i],
0, MAX_UINT_BITS(length), 0);
bits_left -= length;
}
}
fixed(1, bit_equal_to_one, 1);
while (byte_alignment(rw))
fixed(1, bit_equal_to_zero, 0);
}
#ifdef WRITE
current->payload_size = (put_bits_count(rw) - start_position) / 8;
#endif
} else {
uint8_t *data;
#ifdef READ
allocate(current->payload_ref, current->payload_size);
current->payload = current->payload_ref;
#else
allocate(current->payload, current->payload_size);
#endif
data = current->payload;
for (i = 0; i < current->payload_size; i++)
xu(8, payload_byte[i], data[i], 0, 255, 1, i);
}
return 0;
}
static int FUNC(message_list)(CodedBitstreamContext *ctx, RWContext *rw,
SEIRawMessageList *current, int prefix)
{
SEIRawMessage *message;
int err, k;
#ifdef READ
for (k = 0;; k++) {
uint32_t payload_type = 0;
uint32_t payload_size = 0;
uint32_t tmp;
GetBitContext payload_gbc;
while (show_bits(rw, 8) == 0xff) {
fixed(8, ff_byte, 0xff);
payload_type += 255;
}
xu(8, last_payload_type_byte, tmp, 0, 254, 0);
payload_type += tmp;
while (show_bits(rw, 8) == 0xff) {
fixed(8, ff_byte, 0xff);
payload_size += 255;
}
xu(8, last_payload_size_byte, tmp, 0, 254, 0);
payload_size += tmp;
// There must be space remaining for both the payload and
// the trailing bits on the SEI NAL unit.
if (payload_size + 1 > get_bits_left(rw) / 8) {
av_log(ctx->log_ctx, AV_LOG_ERROR,
"Invalid SEI message: payload_size too large "
"(%"PRIu32" bytes).\n", payload_size);
return AVERROR_INVALIDDATA;
}
CHECK(init_get_bits(&payload_gbc, rw->buffer,
get_bits_count(rw) + 8 * payload_size));
skip_bits_long(&payload_gbc, get_bits_count(rw));
CHECK(ff_cbs_sei_list_add(current));
message = &current->messages[k];
message->payload_type = payload_type;
message->payload_size = payload_size;
CHECK(FUNC(message)(ctx, &payload_gbc, message));
skip_bits_long(rw, 8 * payload_size);
if (!cbs_h2645_read_more_rbsp_data(rw))
break;
}
#else
for (k = 0; k < current->nb_messages; k++) {
PutBitContext start_state;
uint32_t tmp;
int trace, i;
message = &current->messages[k];
// We write the payload twice in order to find the size. Trace
// output is switched off for the first write.
trace = ctx->trace_enable;
ctx->trace_enable = 0;
start_state = *rw;
for (i = 0; i < 2; i++) {
*rw = start_state;
tmp = message->payload_type;
while (tmp >= 255) {
fixed(8, ff_byte, 0xff);
tmp -= 255;
}
xu(8, last_payload_type_byte, tmp, 0, 254, 0);
tmp = message->payload_size;
while (tmp >= 255) {
fixed(8, ff_byte, 0xff);
tmp -= 255;
}
xu(8, last_payload_size_byte, tmp, 0, 254, 0);
err = FUNC(message)(ctx, rw, message);
ctx->trace_enable = trace;
if (err < 0)
return err;
}
}
#endif
return 0;
}
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