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avcodec/cbs_av1: don't abort when splitting Temporal Units containing OBUs with no obu_size field 

The ISOBMFF and Matroska specs allow the last OBU in a Sample/Block to have
obu_has_size_field equal to 0.

Reviewed-by: Mark Thompson <sw@jkqxz.net>
Signed-off-by: James Almer <jamrial@gmail.com>
This commit is contained in:
James Almer 2018-11-15 01:07:49 -03:00
parent 31b79e0210
commit 96717a4271
1 changed files with 6 additions and 10 deletions
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16
libavcodec/cbs_av1.c
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@ -788,13 +788,6 @@ static int cbs_av1_split_fragment(CodedBitstreamContext *ctx,
if (err < 0)
goto fail;
if (!header.obu_has_size_field) {
av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid OBU for raw "
"stream: size field must be present.\n");
err = AVERROR_INVALIDDATA;
goto fail;
}
if (get_bits_left(&gbc) < 8) {
av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid OBU: fragment "
"too short (%zu bytes).\n", size);
@ -802,9 +795,12 @@ static int cbs_av1_split_fragment(CodedBitstreamContext *ctx,
goto fail;
}
err = cbs_av1_read_leb128(ctx, &gbc, "obu_size", &obu_size);
if (err < 0)
goto fail;
if (header.obu_has_size_field) {
err = cbs_av1_read_leb128(ctx, &gbc, "obu_size", &obu_size);
if (err < 0)
goto fail;
} else
obu_size = size - 1 - header.obu_extension_flag;
pos = get_bits_count(&gbc);
av_assert0(pos % 8 == 0 && pos / 8 <= size);