--- Includes support for using them when the normal frame header as been lost (try "-bsf:v filter_units=remove_types=3").
libavcodec/cbs_av1.c | 8 +++- libavcodec/cbs_av1.h | 2 + libavcodec/cbs_av1_syntax_template.c | 64 +++++++++++++++++++++++++--- 3 files changed, 66 insertions(+), 8 deletions(-) diff --git a/libavcodec/cbs_av1.c b/libavcodec/cbs_av1.c index 1c49d90f51..b61b757f41 100644 --- a/libavcodec/cbs_av1.c +++ b/libavcodec/cbs_av1.c @@ -996,7 +996,9 @@ static int cbs_av1_read_unit(CodedBitstreamContext *ctx, case AV1_OBU_REDUNDANT_FRAME_HEADER: { err = cbs_av1_read_frame_header_obu(ctx, &gbc, - &obu->obu.frame_header); + &obu->obu.frame_header, + obu->header.obu_type == + AV1_OBU_REDUNDANT_FRAME_HEADER); if (err < 0) return err; } @@ -1124,7 +1126,9 @@ static int cbs_av1_write_obu(CodedBitstreamContext *ctx, case AV1_OBU_REDUNDANT_FRAME_HEADER: { err = cbs_av1_write_frame_header_obu(ctx, pbc, - &obu->obu.frame_header); + &obu->obu.frame_header, + obu->header.obu_type == + AV1_OBU_REDUNDANT_FRAME_HEADER); if (err < 0) return err; } diff --git a/libavcodec/cbs_av1.h b/libavcodec/cbs_av1.h index b66a09c389..af9e88df71 100644 --- a/libavcodec/cbs_av1.h +++ b/libavcodec/cbs_av1.h @@ -400,6 +400,8 @@ typedef struct CodedBitstreamAV1Context { AVBufferRef *sequence_header_ref; int seen_frame_header; + uint8_t *frame_header; + size_t frame_header_size; int temporal_id; int spatial_id; diff --git a/libavcodec/cbs_av1_syntax_template.c b/libavcodec/cbs_av1_syntax_template.c index e146bbf8bb..5649af841a 100644 --- a/libavcodec/cbs_av1_syntax_template.c +++ b/libavcodec/cbs_av1_syntax_template.c @@ -1463,24 +1463,76 @@ static int FUNC(uncompressed_header)(CodedBitstreamContext *ctx, RWContext *rw, } static int FUNC(frame_header_obu)(CodedBitstreamContext *ctx, RWContext *rw, - AV1RawFrameHeader *current) + AV1RawFrameHeader *current, int redundant) { CodedBitstreamAV1Context *priv = ctx->priv_data; - int err; - - HEADER("Frame Header"); + int start_pos, fh_bits, fh_bytes, err; + const uint8_t *fh_start; if (priv->seen_frame_header) { - // Nothing to do. + if (!redundant) { + av_log(ctx->log_ctx, AV_LOG_ERROR, "Invalid repeated " + "frame header OBU.\n"); + return AVERROR_INVALIDDATA; + } else { + GetBitContext fh; + size_t k; + int b; + + HEADER("Redundant Frame Header"); + + init_get_bits(&fh, priv->frame_header, + priv->frame_header_size); + for (k = 0; k < priv->frame_header_size; k++) { + b = get_bits1(&fh); + xf(1, frame_header_copy[k], b, b, b, 1, k); + } + } } else { + if (redundant) + HEADER("Redundant Frame Header (used as Frame Header)"); + else + HEADER("Frame Header"); + priv->seen_frame_header = 1; +#ifdef READ + start_pos = get_bits_count(rw); +#else + start_pos = put_bits_count(rw); +#endif + CHECK(FUNC(uncompressed_header)(ctx, rw, current)); if (current->show_existing_frame) { priv->seen_frame_header = 0; } else { priv->seen_frame_header = 1; + + av_freep(&priv->frame_header); + +#ifdef READ + fh_bits = get_bits_count(rw) - start_pos; + fh_start = rw->buffer + start_pos / 8; +#else + // Need to flush the bitwriter so that we can copy its output, + // but use a copy so we don't affect the caller's structure. + { + PutBitContext tmp = *rw; + flush_put_bits(&tmp); + } + + fh_bits = put_bits_count(rw) - start_pos; + fh_start = rw->buf + start_pos / 8; +#endif + fh_bytes = (fh_bits + 7) / 8; + + priv->frame_header_size = fh_bits; + priv->frame_header = + av_mallocz(fh_bytes + AV_INPUT_BUFFER_PADDING_SIZE); + if (!priv->frame_header) + return AVERROR(ENOMEM); + memcpy(priv->frame_header, fh_start, fh_bytes); } } @@ -1528,7 +1580,7 @@ static int FUNC(frame_obu)(CodedBitstreamContext *ctx, RWContext *rw, { int err; - CHECK(FUNC(frame_header_obu)(ctx, rw, ¤t->header)); + CHECK(FUNC(frame_header_obu)(ctx, rw, ¤t->header, 0)); CHECK(FUNC(byte_alignment)(ctx, rw)); -- 2.19.1 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel