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avcodec/vp3: Avoid complete VLC struct, only use VLCElem* 

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt 2023-09-24 00:21:41 +02:00
parent 6c7a344b65
commit 75c6a253a4
1 changed files with 31 additions and 30 deletions
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61
libavcodec/vp3.c
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@ -190,6 +190,7 @@ typedef struct HuffTable {
} HuffTable;
typedef struct CoeffVLCs {
const VLCElem *vlc_tabs[80];
VLC vlcs[80];
} CoeffVLCs;
@ -1181,7 +1182,7 @@ static inline int get_coeff(GetBitContext *gb, int token, int16_t *coeff)
* be passed into the next call to this same function.
*/
static int unpack_vlcs(Vp3DecodeContext *s, GetBitContext *gb,
const VLC *table, int coeff_index,
const VLCElem *vlc_table, int coeff_index,
int plane,
int eob_run)
{
@ -1197,7 +1198,6 @@ static int unpack_vlcs(Vp3DecodeContext *s, GetBitContext *gb,
/* local references to structure members to avoid repeated dereferences */
const int *coded_fragment_list = s->coded_fragment_list[plane];
Vp3Fragment *all_fragments = s->all_fragments;
const VLCElem *vlc_table = table->table;
if (num_coeffs < 0) {
av_log(s->avctx, AV_LOG_ERROR,
@ -1303,14 +1303,13 @@ static void reverse_dc_prediction(Vp3DecodeContext *s,
*/
static int unpack_dct_coeffs(Vp3DecodeContext *s, GetBitContext *gb)
{
const VLC *coeff_vlc = s->coeff_vlc->vlcs;
const VLCElem *const *coeff_vlc = s->coeff_vlc->vlc_tabs;
int dc_y_table;
int dc_c_table;
int ac_y_table;
int ac_c_table;
int residual_eob_run = 0;
const VLC *y_tables[64];
const VLC *c_tables[64];
const VLCElem *y_tables[64], *c_tables[64];
s->dct_tokens[0][0] = s->dct_tokens_base;
@ -1322,7 +1321,7 @@ static int unpack_dct_coeffs(Vp3DecodeContext *s, GetBitContext *gb)
dc_c_table = get_bits(gb, 4);
/* unpack the Y plane DC coefficients */
residual_eob_run = unpack_vlcs(s, gb, &coeff_vlc[dc_y_table], 0,
residual_eob_run = unpack_vlcs(s, gb, coeff_vlc[dc_y_table], 0,
0, residual_eob_run);
if (residual_eob_run < 0)
return residual_eob_run;
@ -1333,11 +1332,11 @@ static int unpack_dct_coeffs(Vp3DecodeContext *s, GetBitContext *gb)
reverse_dc_prediction(s, 0, s->fragment_width[0], s->fragment_height[0]);
/* unpack the C plane DC coefficients */
residual_eob_run = unpack_vlcs(s, gb, &coeff_vlc[dc_c_table], 0,
residual_eob_run = unpack_vlcs(s, gb, coeff_vlc[dc_c_table], 0,
1, residual_eob_run);
if (residual_eob_run < 0)
return residual_eob_run;
residual_eob_run = unpack_vlcs(s, gb, &coeff_vlc[dc_c_table], 0,
residual_eob_run = unpack_vlcs(s, gb, coeff_vlc[dc_c_table], 0,
2, residual_eob_run);
if (residual_eob_run < 0)
return residual_eob_run;
@ -1359,23 +1358,23 @@ static int unpack_dct_coeffs(Vp3DecodeContext *s, GetBitContext *gb)
/* build tables of AC VLC tables */
for (int i = 1; i <= 5; i++) {
/* AC VLC table group 1 */
y_tables[i] = &coeff_vlc[ac_y_table + 16];
c_tables[i] = &coeff_vlc[ac_c_table + 16];
y_tables[i] = coeff_vlc[ac_y_table + 16];
c_tables[i] = coeff_vlc[ac_c_table + 16];
}
for (int i = 6; i <= 14; i++) {
/* AC VLC table group 2 */
y_tables[i] = &coeff_vlc[ac_y_table + 32];
c_tables[i] = &coeff_vlc[ac_c_table + 32];
y_tables[i] = coeff_vlc[ac_y_table + 32];
c_tables[i] = coeff_vlc[ac_c_table + 32];
}
for (int i = 15; i <= 27; i++) {
/* AC VLC table group 3 */
y_tables[i] = &coeff_vlc[ac_y_table + 48];
c_tables[i] = &coeff_vlc[ac_c_table + 48];
y_tables[i] = coeff_vlc[ac_y_table + 48];
c_tables[i] = coeff_vlc[ac_c_table + 48];
}
for (int i = 28; i <= 63; i++) {
/* AC VLC table group 4 */
y_tables[i] = &coeff_vlc[ac_y_table + 64];
c_tables[i] = &coeff_vlc[ac_c_table + 64];
y_tables[i] = coeff_vlc[ac_y_table + 64];
c_tables[i] = coeff_vlc[ac_c_table + 64];
}
/* decode all AC coefficients */
@ -1406,7 +1405,7 @@ static int unpack_dct_coeffs(Vp3DecodeContext *s, GetBitContext *gb)
* @return < 0 on error
*/
static int vp4_unpack_vlcs(Vp3DecodeContext *s, GetBitContext *gb,
const VLC *vlc_tables[64],
const VLCElem *const vlc_tables[64],
int plane, int eob_tracker[64], int fragment)
{
int token;
@ -1419,7 +1418,7 @@ static int vp4_unpack_vlcs(Vp3DecodeContext *s, GetBitContext *gb,
if (get_bits_left(gb) < 1)
return AVERROR_INVALIDDATA;
token = get_vlc2(gb, vlc_tables[coeff_i]->table, 11, 3);
token = get_vlc2(gb, vlc_tables[coeff_i], 11, 3);
/* use the token to get a zero run, a coefficient, and an eob run */
if ((unsigned) token <= 6U) {
@ -1526,12 +1525,12 @@ static void vp4_set_tokens_base(Vp3DecodeContext *s)
static int vp4_unpack_dct_coeffs(Vp3DecodeContext *s, GetBitContext *gb)
{
const VLC *coeff_vlc = s->coeff_vlc->vlcs;
const VLCElem *const *coeff_vlc = s->coeff_vlc->vlc_tabs;
int dc_y_table;
int dc_c_table;
int ac_y_table;
int ac_c_table;
const VLC *tables[2][64];
const VLCElem *tables[2][64];
int eob_tracker[64];
VP4Predictor dc_pred[6][6];
int last_dc[NB_VP4_DC_TYPES];
@ -1549,27 +1548,27 @@ static int vp4_unpack_dct_coeffs(Vp3DecodeContext *s, GetBitContext *gb)
/* build tables of DC/AC VLC tables */
/* DC table group */
tables[0][0] = &coeff_vlc[dc_y_table];
tables[1][0] = &coeff_vlc[dc_c_table];
tables[0][0] = coeff_vlc[dc_y_table];
tables[1][0] = coeff_vlc[dc_c_table];
for (int i = 1; i <= 5; i++) {
/* AC VLC table group 1 */
tables[0][i] = &coeff_vlc[ac_y_table + 16];
tables[1][i] = &coeff_vlc[ac_c_table + 16];
tables[0][i] = coeff_vlc[ac_y_table + 16];
tables[1][i] = coeff_vlc[ac_c_table + 16];
}
for (int i = 6; i <= 14; i++) {
/* AC VLC table group 2 */
tables[0][i] = &coeff_vlc[ac_y_table + 32];
tables[1][i] = &coeff_vlc[ac_c_table + 32];
tables[0][i] = coeff_vlc[ac_y_table + 32];
tables[1][i] = coeff_vlc[ac_c_table + 32];
}
for (int i = 15; i <= 27; i++) {
/* AC VLC table group 3 */
tables[0][i] = &coeff_vlc[ac_y_table + 48];
tables[1][i] = &coeff_vlc[ac_c_table + 48];
tables[0][i] = coeff_vlc[ac_y_table + 48];
tables[1][i] = coeff_vlc[ac_c_table + 48];
}
for (int i = 28; i <= 63; i++) {
/* AC VLC table group 4 */
tables[0][i] = &coeff_vlc[ac_y_table + 64];
tables[1][i] = &coeff_vlc[ac_c_table + 64];
tables[0][i] = coeff_vlc[ac_y_table + 64];
tables[1][i] = coeff_vlc[ac_c_table + 64];
}
vp4_set_tokens_base(s);
@ -2501,6 +2500,7 @@ static av_cold int vp3_decode_init(AVCodecContext *avctx)
0, 0, avctx);
if (ret < 0)
return ret;
vlcs->vlc_tabs[i] = vlcs->vlcs[i].table;
}
} else {
for (int i = 0; i < FF_ARRAY_ELEMS(vlcs->vlcs); i++) {
@ -2512,6 +2512,7 @@ static av_cold int vp3_decode_init(AVCodecContext *avctx)
0, 0, avctx);
if (ret < 0)
return ret;
vlcs->vlc_tabs[i] = vlcs->vlcs[i].table;
}
}
}