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avcodec/aacsbr_template: Check values read in read_sbr_noise()

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Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2015-11-19 13:00:27 +01:00
parent bfd0e02dd6
commit d877b88f51
1 changed files with 28 additions and 8 deletions
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36
libavcodec/aacsbr_template.c
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@ -886,7 +886,7 @@ static void read_sbr_envelope(SpectralBandReplication *sbr, GetBitContext *gb,
sizeof(ch_data->env_facs[0]));
}
static void read_sbr_noise(SpectralBandReplication *sbr, GetBitContext *gb,
static int read_sbr_noise(AACContext *ac, SpectralBandReplication *sbr, GetBitContext *gb,
SBRData *ch_data, int ch)
{
int i, j;
@ -908,18 +908,29 @@ static void read_sbr_noise(SpectralBandReplication *sbr, GetBitContext *gb,
for (i = 0; i < ch_data->bs_num_noise; i++) {
if (ch_data->bs_df_noise[i]) {
for (j = 0; j < sbr->n_q; j++)
for (j = 0; j < sbr->n_q; j++) {
ch_data->noise_facs_q[i + 1][j] = ch_data->noise_facs_q[i][j] + delta * (get_vlc2(gb, t_huff, 9, 2) - t_lav);
if (ch_data->noise_facs_q[i + 1][j] > 30U) {
av_log(ac->avctx, AV_LOG_ERROR, "noise_facs_q %d is invalid\n", ch_data->noise_facs_q[i + 1][j]);
return AVERROR_INVALIDDATA;
}
}
} else {
ch_data->noise_facs_q[i + 1][0] = delta * get_bits(gb, 5); // bs_noise_start_value_balance or bs_noise_start_value_level
for (j = 1; j < sbr->n_q; j++)
for (j = 1; j < sbr->n_q; j++) {
ch_data->noise_facs_q[i + 1][j] = ch_data->noise_facs_q[i + 1][j - 1] + delta * (get_vlc2(gb, f_huff, 9, 3) - f_lav);
if (ch_data->noise_facs_q[i + 1][j] > 30U) {
av_log(ac->avctx, AV_LOG_ERROR, "noise_facs_q %d is invalid\n", ch_data->noise_facs_q[i + 1][j]);
return AVERROR_INVALIDDATA;
}
}
}
}
//assign 0th elements of noise_facs_q from last elements
memcpy(ch_data->noise_facs_q[0], ch_data->noise_facs_q[ch_data->bs_num_noise],
sizeof(ch_data->noise_facs_q[0]));
return 0;
}
static void read_sbr_extension(AACContext *ac, SpectralBandReplication *sbr,
@ -957,6 +968,8 @@ static int read_sbr_single_channel_element(AACContext *ac,
SpectralBandReplication *sbr,
GetBitContext *gb)
{
int ret;
if (get_bits1(gb)) // bs_data_extra
skip_bits(gb, 4); // bs_reserved
@ -965,7 +978,8 @@ static int read_sbr_single_channel_element(AACContext *ac,
read_sbr_dtdf(sbr, gb, &sbr->data[0]);
read_sbr_invf(sbr, gb, &sbr->data[0]);
read_sbr_envelope(sbr, gb, &sbr->data[0], 0);
read_sbr_noise(sbr, gb, &sbr->data[0], 0);
if((ret = read_sbr_noise(ac, sbr, gb, &sbr->data[0], 0)) < 0)
return ret;
if ((sbr->data[0].bs_add_harmonic_flag = get_bits1(gb)))
get_bits1_vector(gb, sbr->data[0].bs_add_harmonic, sbr->n[1]);
@ -977,6 +991,8 @@ static int read_sbr_channel_pair_element(AACContext *ac,
SpectralBandReplication *sbr,
GetBitContext *gb)
{
int ret;
if (get_bits1(gb)) // bs_data_extra
skip_bits(gb, 8); // bs_reserved
@ -990,9 +1006,11 @@ static int read_sbr_channel_pair_element(AACContext *ac,
memcpy(sbr->data[1].bs_invf_mode[1], sbr->data[1].bs_invf_mode[0], sizeof(sbr->data[1].bs_invf_mode[0]));
memcpy(sbr->data[1].bs_invf_mode[0], sbr->data[0].bs_invf_mode[0], sizeof(sbr->data[1].bs_invf_mode[0]));
read_sbr_envelope(sbr, gb, &sbr->data[0], 0);
read_sbr_noise(sbr, gb, &sbr->data[0], 0);
if((ret = read_sbr_noise(ac, sbr, gb, &sbr->data[0], 0)) < 0)
return ret;
read_sbr_envelope(sbr, gb, &sbr->data[1], 1);
read_sbr_noise(sbr, gb, &sbr->data[1], 1);
if((ret = read_sbr_noise(ac, sbr, gb, &sbr->data[1], 1)) < 0)
return ret;
} else {
if (read_sbr_grid(ac, sbr, gb, &sbr->data[0]) ||
read_sbr_grid(ac, sbr, gb, &sbr->data[1]))
@ -1003,8 +1021,10 @@ static int read_sbr_channel_pair_element(AACContext *ac,
read_sbr_invf(sbr, gb, &sbr->data[1]);
read_sbr_envelope(sbr, gb, &sbr->data[0], 0);
read_sbr_envelope(sbr, gb, &sbr->data[1], 1);
read_sbr_noise(sbr, gb, &sbr->data[0], 0);
read_sbr_noise(sbr, gb, &sbr->data[1], 1);
if((ret = read_sbr_noise(ac, sbr, gb, &sbr->data[0], 0)) < 0)
return ret;
if((ret = read_sbr_noise(ac, sbr, gb, &sbr->data[1], 1)) < 0)
return ret;
}
if ((sbr->data[0].bs_add_harmonic_flag = get_bits1(gb)))