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Code Issues Releases Activity

avcodec/h264_ps: Forward errors from decode_scaling_list()

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Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-03-09 13:54:24 +01:00
parent 195784ec95
commit dc0b9b218c
1 changed files with 26 additions and 18 deletions
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44
libavcodec/h264_ps.c
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@ -247,7 +247,7 @@ static inline int decode_vui_parameters(GetBitContext *gb, AVCodecContext *avctx
return 0;
}
static void decode_scaling_list(GetBitContext *gb, uint8_t *factors, int size,
static int decode_scaling_list(GetBitContext *gb, uint8_t *factors, int size,
const uint8_t *jvt_list,
const uint8_t *fallback_list)
{
@ -261,7 +261,7 @@ static void decode_scaling_list(GetBitContext *gb, uint8_t *factors, int size,
int v = get_se_golomb(gb);
if (v < -128 || v > 127) {
av_log(NULL, AV_LOG_ERROR, "delta scale %d is invalid\n", v);
v = -last;
return AVERROR_INVALIDDATA;
}
next = (last + v) & 0xff;
}
@ -271,6 +271,7 @@ static void decode_scaling_list(GetBitContext *gb, uint8_t *factors, int size,
}
last = factors[scan[i]] = next ? next : last;
}
return 0;
}
/* returns non zero if the provided SPS scaling matrix has been filled */
@ -288,23 +289,24 @@ static int decode_scaling_matrices(GetBitContext *gb, const SPS *sps,
};
int ret = 0;
if (get_bits1(gb)) {
ret = is_sps;
decode_scaling_list(gb, scaling_matrix4[0], 16, default_scaling4[0], fallback[0]); // Intra, Y
decode_scaling_list(gb, scaling_matrix4[1], 16, default_scaling4[0], scaling_matrix4[0]); // Intra, Cr
decode_scaling_list(gb, scaling_matrix4[2], 16, default_scaling4[0], scaling_matrix4[1]); // Intra, Cb
decode_scaling_list(gb, scaling_matrix4[3], 16, default_scaling4[1], fallback[1]); // Inter, Y
decode_scaling_list(gb, scaling_matrix4[4], 16, default_scaling4[1], scaling_matrix4[3]); // Inter, Cr
decode_scaling_list(gb, scaling_matrix4[5], 16, default_scaling4[1], scaling_matrix4[4]); // Inter, Cb
ret |= decode_scaling_list(gb, scaling_matrix4[0], 16, default_scaling4[0], fallback[0]); // Intra, Y
ret |= decode_scaling_list(gb, scaling_matrix4[1], 16, default_scaling4[0], scaling_matrix4[0]); // Intra, Cr
ret |= decode_scaling_list(gb, scaling_matrix4[2], 16, default_scaling4[0], scaling_matrix4[1]); // Intra, Cb
ret |= decode_scaling_list(gb, scaling_matrix4[3], 16, default_scaling4[1], fallback[1]); // Inter, Y
ret |= decode_scaling_list(gb, scaling_matrix4[4], 16, default_scaling4[1], scaling_matrix4[3]); // Inter, Cr
ret |= decode_scaling_list(gb, scaling_matrix4[5], 16, default_scaling4[1], scaling_matrix4[4]); // Inter, Cb
if (is_sps || pps->transform_8x8_mode) {
decode_scaling_list(gb, scaling_matrix8[0], 64, default_scaling8[0], fallback[2]); // Intra, Y
decode_scaling_list(gb, scaling_matrix8[3], 64, default_scaling8[1], fallback[3]); // Inter, Y
ret |= decode_scaling_list(gb, scaling_matrix8[0], 64, default_scaling8[0], fallback[2]); // Intra, Y
ret |= decode_scaling_list(gb, scaling_matrix8[3], 64, default_scaling8[1], fallback[3]); // Inter, Y
if (sps->chroma_format_idc == 3) {
decode_scaling_list(gb, scaling_matrix8[1], 64, default_scaling8[0], scaling_matrix8[0]); // Intra, Cr
decode_scaling_list(gb, scaling_matrix8[4], 64, default_scaling8[1], scaling_matrix8[3]); // Inter, Cr
decode_scaling_list(gb, scaling_matrix8[2], 64, default_scaling8[0], scaling_matrix8[1]); // Intra, Cb
decode_scaling_list(gb, scaling_matrix8[5], 64, default_scaling8[1], scaling_matrix8[4]); // Inter, Cb
ret |= decode_scaling_list(gb, scaling_matrix8[1], 64, default_scaling8[0], scaling_matrix8[0]); // Intra, Cr
ret |= decode_scaling_list(gb, scaling_matrix8[4], 64, default_scaling8[1], scaling_matrix8[3]); // Inter, Cr
ret |= decode_scaling_list(gb, scaling_matrix8[2], 64, default_scaling8[0], scaling_matrix8[1]); // Intra, Cb
ret |= decode_scaling_list(gb, scaling_matrix8[5], 64, default_scaling8[1], scaling_matrix8[4]); // Inter, Cb
}
}
if (!ret)
ret = is_sps;
}
return ret;
@ -335,6 +337,7 @@ int ff_h264_decode_seq_parameter_set(GetBitContext *gb, AVCodecContext *avctx,
unsigned int sps_id;
int i, log2_max_frame_num_minus4;
SPS *sps;
int ret;
sps_buf = av_buffer_allocz(sizeof(*sps));
if (!sps_buf)
@ -413,8 +416,11 @@ int ff_h264_decode_seq_parameter_set(GetBitContext *gb, AVCodecContext *avctx,
goto fail;
}
sps->transform_bypass = get_bits1(gb);
sps->scaling_matrix_present |= decode_scaling_matrices(gb, sps, NULL, 1,
sps->scaling_matrix4, sps->scaling_matrix8);
ret = decode_scaling_matrices(gb, sps, NULL, 1,
sps->scaling_matrix4, sps->scaling_matrix8);
if (ret < 0)
goto fail;
sps->scaling_matrix_present |= ret;
} else {
sps->chroma_format_idc = 1;
sps->bit_depth_luma = 8;
@ -846,8 +852,10 @@ int ff_h264_decode_picture_parameter_set(GetBitContext *gb, AVCodecContext *avct
bits_left = bit_length - get_bits_count(gb);
if (bits_left > 0 && more_rbsp_data_in_pps(sps, avctx)) {
pps->transform_8x8_mode = get_bits1(gb);
decode_scaling_matrices(gb, sps, pps, 0,
ret = decode_scaling_matrices(gb, sps, pps, 0,
pps->scaling_matrix4, pps->scaling_matrix8);
if (ret < 0)
goto fail;
// second_chroma_qp_index_offset
pps->chroma_qp_index_offset[1] = get_se_golomb(gb);
if (pps->chroma_qp_index_offset[1] < -12 || pps->chroma_qp_index_offset[1] > 12) {