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h264_metadata_bsf: Move SEI user data parsing to init time

This commit is contained in:
Mark Thompson 2021-01-01 21:35:12 +00:00
parent 4bf3384800
commit 75092c5b45
1 changed files with 43 additions and 48 deletions
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85
libavcodec/h264_metadata_bsf.c
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@ -78,6 +78,7 @@ typedef struct H264MetadataContext {
int crop_bottom;
const char *sei_user_data;
H264RawSEIPayload sei_user_data_payload;
int delete_filler;
@ -413,56 +414,12 @@ static int h264_metadata_filter(AVBSFContext *bsf, AVPacket *pkt)
// Only insert the SEI in access units containing SPSs, and also
// unconditionally in the first access unit we ever see.
if (ctx->sei_user_data && (has_sps || !ctx->done_first_au)) {
H264RawSEIPayload payload = {
.payload_type = H264_SEI_TYPE_USER_DATA_UNREGISTERED,
};
SEIRawUserDataUnregistered *udu =
&payload.payload.user_data_unregistered;
for (i = j = 0; j < 32 && ctx->sei_user_data[i]; i++) {
int c, v;
c = ctx->sei_user_data[i];
if (c == '-') {
continue;
} else if (av_isxdigit(c)) {
c = av_tolower(c);
v = (c <= '9' ? c - '0' : c - 'a' + 10);
} else {
goto invalid_user_data;
}
if (j & 1)
udu->uuid_iso_iec_11578[j / 2] |= v;
else
udu->uuid_iso_iec_11578[j / 2] = v << 4;
++j;
}
if (j == 32 && ctx->sei_user_data[i] == '+') {
size_t len = strlen(ctx->sei_user_data + i + 1);
udu->data_ref = av_buffer_alloc(len + 1);
if (!udu->data_ref) {
err = AVERROR(ENOMEM);
goto fail;
}
udu->data = udu->data_ref->data;
udu->data_length = len + 1;
memcpy(udu->data, ctx->sei_user_data + i + 1, len + 1);
err = ff_cbs_h264_add_sei_message(au, &payload);
err = ff_cbs_h264_add_sei_message(au, &ctx->sei_user_data_payload);
if (err < 0) {
av_log(bsf, AV_LOG_ERROR, "Failed to add user data SEI "
"message to access unit.\n");
goto fail;
}
} else {
invalid_user_data:
av_log(bsf, AV_LOG_ERROR, "Invalid user data: "
"must be \"UUID+string\".\n");
err = AVERROR(EINVAL);
goto fail;
}
}
if (ctx->delete_filler) {
@ -627,6 +584,44 @@ static int h264_metadata_init(AVBSFContext *bsf)
CodedBitstreamFragment *au = &ctx->access_unit;
int err, i;
if (ctx->sei_user_data) {
SEIRawUserDataUnregistered *udu =
&ctx->sei_user_data_payload.payload.user_data_unregistered;
int j;
ctx->sei_user_data_payload.payload_type =
H264_SEI_TYPE_USER_DATA_UNREGISTERED;
// Parse UUID. It must be a hex string of length 32, possibly
// containing '-'s between hex digits (which we ignore).
for (i = j = 0; j < 32 && i < 64 && ctx->sei_user_data[i]; i++) {
int c, v;
c = ctx->sei_user_data[i];
if (c == '-') {
continue;
} else if (av_isxdigit(c)) {
c = av_tolower(c);
v = (c <= '9' ? c - '0' : c - 'a' + 10);
} else {
break;
}
if (j & 1)
udu->uuid_iso_iec_11578[j / 2] |= v;
else
udu->uuid_iso_iec_11578[j / 2] = v << 4;
++j;
}
if (j == 32 && ctx->sei_user_data[i] == '+') {
udu->data = (uint8_t*)ctx->sei_user_data + i + 1;
udu->data_length = strlen(udu->data) + 1;
} else {
av_log(bsf, AV_LOG_ERROR, "Invalid user data: "
"must be \"UUID+string\".\n");
err = AVERROR(EINVAL);
goto fail;
}
}
err = ff_cbs_init(&ctx->input, AV_CODEC_ID_H264, bsf);
if (err < 0)
return err;