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lavc/ffv1dec: declare loop variables in the loop where possible

Anton Khirnov committed 2 years ago

Commit d776fa41 parent 8e19c241 file · +22 −23Browse files

Showing the changes to libavcodec (1 of 1 file). Show all

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libavcodec/ffv1dec.c+22−23
@@ -46,7 +46,7 @@ static inline av_flatten int get_symbol_inline(RangeCoder *c, uint8_t *state, · 45 unmodified lines
46 if (get_rac(c, state + 0))46 if (get_rac(c, state + 0))
47 return 0;47 return 0;
48 else {48 else {
49 int i, e;49 int e;
50 unsigned a;50 unsigned a;
51 e = 0;51 e = 0;
52 while (get_rac(c, state + 1 + FFMIN(e, 9))) { // 1..1052 while (get_rac(c, state + 1 + FFMIN(e, 9))) { // 1..10
@@ -56,7 +56,7 @@ static inline av_flatten int get_symbol_inline(RangeCoder *c, uint8_t *state, · 3 unmodified lines
56 }56 }
57 57
58 a = 1;58 a = 1;
59 for (i = e - 1; i >= 0; i--)59 for (int i = e - 1; i >= 0; i--)
60 a += a + get_rac(c, state + 22 + FFMIN(i, 9)); // 22..3160 a += a + get_rac(c, state + 22 + FFMIN(i, 9)); // 22..31
61 61
62 e = -(is_signed && get_rac(c, state + 11 + FFMIN(e, 10))); // 11..2162 e = -(is_signed && get_rac(c, state + 11 + FFMIN(e, 10))); // 11..21
@@ -167,7 +167,7 @@ static int decode_slice_header(const FFV1Context *f, FFV1Context *fs) · 104 unmodified lines
167{167{
168 RangeCoder *c = &fs->c;168 RangeCoder *c = &fs->c;
169 uint8_t state[CONTEXT_SIZE];169 uint8_t state[CONTEXT_SIZE];
170 unsigned ps, i, context_count;170 unsigned ps, context_count;
171 int sx, sy, sw, sh;171 int sx, sy, sw, sh;
172 172
173 memset(state, 128, sizeof(state));173 memset(state, 128, sizeof(state));
@@ -197,7 +197,7 @@ static int decode_slice_header(const FFV1Context *f, FFV1Context *fs) · 23 unmodified lines
197 if (fs->ac == AC_GOLOMB_RICE && fs->slice_width >= (1<<23))197 if (fs->ac == AC_GOLOMB_RICE && fs->slice_width >= (1<<23))
198 return AVERROR_INVALIDDATA;198 return AVERROR_INVALIDDATA;
199 199
200 for (i = 0; i < f->plane_count; i++) {200 for (unsigned i = 0; i < f->plane_count; i++) {
201 PlaneContext * const p = &fs->plane[i];201 PlaneContext * const p = &fs->plane[i];
202 int idx = get_symbol(c, state, 0);202 int idx = get_symbol(c, state, 0);
203 if (idx >= (unsigned)f->quant_table_count) {203 if (idx >= (unsigned)f->quant_table_count) {
@@ -259,7 +259,7 @@ static int decode_slice(AVCodecContext *c, void *arg) · 55 unmodified lines
259 int width, height, x, y, ret;259 int width, height, x, y, ret;
260 const int ps = av_pix_fmt_desc_get(c->pix_fmt)->comp[0].step;260 const int ps = av_pix_fmt_desc_get(c->pix_fmt)->comp[0].step;
261 AVFrame * const p = f->cur;261 AVFrame * const p = f->cur;
262 int i, si;262 int si;
263 263
264 for( si=0; fs != f->slice_context[si]; si ++)264 for( si=0; fs != f->slice_context[si]; si ++)
265 ;265 ;
@@ -276,7 +276,7 @@ static int decode_slice(AVCodecContext *c, void *arg) · 10 unmodified lines
276 if (!(p->flags & AV_FRAME_FLAG_KEY))276 if (!(p->flags & AV_FRAME_FLAG_KEY))
277 fsdst->slice_damaged |= fssrc->slice_damaged;277 fsdst->slice_damaged |= fssrc->slice_damaged;
278 278
279 for (i = 0; i < f->plane_count; i++) {279 for (int i = 0; i < f->plane_count; i++) {
280 PlaneContext *psrc = &fssrc->plane[i];280 PlaneContext *psrc = &fssrc->plane[i];
281 PlaneContext *pdst = &fsdst->plane[i];281 PlaneContext *pdst = &fsdst->plane[i];
282 282
@@ -424,7 +424,7 @@ static int read_extra_header(FFV1Context *f) · 141 unmodified lines
424{424{
425 RangeCoder *const c = &f->c;425 RangeCoder *const c = &f->c;
426 uint8_t state[CONTEXT_SIZE];426 uint8_t state[CONTEXT_SIZE];
427 int i, j, k, ret;427 int ret;
428 uint8_t state2[32][CONTEXT_SIZE];428 uint8_t state2[32][CONTEXT_SIZE];
429 unsigned crc = 0;429 unsigned crc = 0;
430 430
@@ -453,7 +453,7 @@ static int read_extra_header(FFV1Context *f) · 22 unmodified lines
453 f->ac = get_symbol(c, state, 0);453 f->ac = get_symbol(c, state, 0);
454 454
455 if (f->ac == AC_RANGE_CUSTOM_TAB) {455 if (f->ac == AC_RANGE_CUSTOM_TAB) {
456 for (i = 1; i < 256; i++)456 for (int i = 1; i < 256; i++)
457 f->state_transition[i] = get_symbol(c, state, 1) + c->one_state[i];457 f->state_transition[i] = get_symbol(c, state, 1) + c->one_state[i];
458 }458 }
459 459
@@ -492,7 +492,7 @@ static int read_extra_header(FFV1Context *f) · 32 unmodified lines
492 return AVERROR_INVALIDDATA;492 return AVERROR_INVALIDDATA;
493 }493 }
494 494
495 for (i = 0; i < f->quant_table_count; i++) {495 for (int i = 0; i < f->quant_table_count; i++) {
496 f->context_count[i] = read_quant_tables(c, f->quant_tables[i]);496 f->context_count[i] = read_quant_tables(c, f->quant_tables[i]);
497 if (f->context_count[i] < 0) {497 if (f->context_count[i] < 0) {
498 av_log(f->avctx, AV_LOG_ERROR, "read_quant_table error\n");498 av_log(f->avctx, AV_LOG_ERROR, "read_quant_table error\n");
@@ -502,10 +502,10 @@ static int read_extra_header(FFV1Context *f) · 3 unmodified lines
502 if ((ret = ff_ffv1_allocate_initial_states(f)) < 0)502 if ((ret = ff_ffv1_allocate_initial_states(f)) < 0)
503 return ret;503 return ret;
504 504
505 for (i = 0; i < f->quant_table_count; i++)505 for (int i = 0; i < f->quant_table_count; i++)
506 if (get_rac(c, state)) {506 if (get_rac(c, state)) {
507 for (j = 0; j < f->context_count[i]; j++)507 for (int j = 0; j < f->context_count[i]; j++)
508 for (k = 0; k < CONTEXT_SIZE; k++) {508 for (int k = 0; k < CONTEXT_SIZE; k++) {
509 int pred = j ? f->initial_states[i][j - 1][k] : 128;509 int pred = j ? f->initial_states[i][j - 1][k] : 128;
510 f->initial_states[i][j][k] =510 f->initial_states[i][j][k] =
511 (pred + get_symbol(c, state2[k], 1)) & 0xFF;511 (pred + get_symbol(c, state2[k], 1)) & 0xFF;
@@ -550,7 +550,7 @@ static int read_extra_header(FFV1Context *f) · 38 unmodified lines
550static int read_header(FFV1Context *f)550static int read_header(FFV1Context *f)
551{551{
552 uint8_t state[CONTEXT_SIZE];552 uint8_t state[CONTEXT_SIZE];
553 int i, j, context_count = -1; //-1 to avoid warning553 int context_count = -1; //-1 to avoid warning
554 RangeCoder *const c = &f->slice_context[0]->c;554 RangeCoder *const c = &f->slice_context[0]->c;
555 555
556 memset(state, 128, sizeof(state));556 memset(state, 128, sizeof(state));
@@ -566,7 +566,7 @@ static int read_header(FFV1Context *f) · 9 unmodified lines
566 f->ac = get_symbol(c, state, 0);566 f->ac = get_symbol(c, state, 0);
567 567
568 if (f->ac == AC_RANGE_CUSTOM_TAB) {568 if (f->ac == AC_RANGE_CUSTOM_TAB) {
569 for (i = 1; i < 256; i++) {569 for (int i = 1; i < 256; i++) {
570 int st = get_symbol(c, state, 1) + c->one_state[i];570 int st = get_symbol(c, state, 1) + c->one_state[i];
571 if (st < 1 || st > 255) {571 if (st < 1 || st > 255) {
572 av_log(f->avctx, AV_LOG_ERROR, "invalid state transition %d\n", st);572 av_log(f->avctx, AV_LOG_ERROR, "invalid state transition %d\n", st);
@@ -790,7 +790,7 @@ static int read_header(FFV1Context *f) · 217 unmodified lines
790 return AVERROR_INVALIDDATA;790 return AVERROR_INVALIDDATA;
791 }791 }
792 792
793 for (j = 0; j < f->slice_count; j++) {793 for (int j = 0; j < f->slice_count; j++) {
794 FFV1Context *fs = f->slice_context[j];794 FFV1Context *fs = f->slice_context[j];
795 fs->ac = f->ac;795 fs->ac = f->ac;
796 fs->packed_at_lsb = f->packed_at_lsb;796 fs->packed_at_lsb = f->packed_at_lsb;
@@ -819,7 +819,7 @@ static int read_header(FFV1Context *f) · 22 unmodified lines
819 && (unsigned)fs->slice_y + (uint64_t)fs->slice_height <= f->height);819 && (unsigned)fs->slice_y + (uint64_t)fs->slice_height <= f->height);
820 }820 }
821 821
822 for (i = 0; i < f->plane_count; i++) {822 for (int i = 0; i < f->plane_count; i++) {
823 PlaneContext *const p = &fs->plane[i];823 PlaneContext *const p = &fs->plane[i];
824 824
825 if (f->version == 2) {825 if (f->version == 2) {
@@ -874,7 +874,7 @@ static int decode_frame(AVCodecContext *avctx, AVFrame *rframe, · 48 unmodified lines
874 int buf_size = avpkt->size;874 int buf_size = avpkt->size;
875 FFV1Context *f = avctx->priv_data;875 FFV1Context *f = avctx->priv_data;
876 RangeCoder *const c = &f->slice_context[0]->c;876 RangeCoder *const c = &f->slice_context[0]->c;
877 int i, ret, key_frame;877 int ret, key_frame;
878 uint8_t keystate = 128;878 uint8_t keystate = 128;
879 uint8_t *buf_p;879 uint8_t *buf_p;
880 AVFrame *p;880 AVFrame *p;
@@ -908,6 +908,7 @@ static int decode_frame(AVCodecContext *avctx, AVFrame *rframe, · 27 unmodified lines
908 } else {908 } else {
909 int w = avctx->width;909 int w = avctx->width;
910 int s = 1 + w / (1<<23);910 int s = 1 + w / (1<<23);
911 int i;
911 912
912 w /= s;913 w /= s;
913 914
@@ -941,7 +942,7 @@ static int decode_frame(AVCodecContext *avctx, AVFrame *rframe, · 27 unmodified lines
941 ff_thread_finish_setup(avctx);942 ff_thread_finish_setup(avctx);
942 943
943 buf_p = buf + buf_size;944 buf_p = buf + buf_size;
944 for (i = f->slice_count - 1; i >= 0; i--) {945 for (int i = f->slice_count - 1; i >= 0; i--) {
945 FFV1Context *fs = f->slice_context[i];946 FFV1Context *fs = f->slice_context[i];
946 int trailer = 3 + 5*!!f->ec;947 int trailer = 3 + 5*!!f->ec;
947 int v;948 int v;
@@ -991,15 +992,14 @@ static int decode_frame(AVCodecContext *avctx, AVFrame *rframe, · 43 unmodified lines
991 f->slice_count,992 f->slice_count,
992 sizeof(void*));993 sizeof(void*));
993 994
994 for (i = f->slice_count - 1; i >= 0; i--) {995 for (int i = f->slice_count - 1; i >= 0; i--) {
995 FFV1Context *fs = f->slice_context[i];996 FFV1Context *fs = f->slice_context[i];
996 int j;
997 if (fs->slice_damaged && f->last_picture.f) {997 if (fs->slice_damaged && f->last_picture.f) {
998 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);998 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
999 const uint8_t *src[4];999 const uint8_t *src[4];
1000 uint8_t *dst[4];1000 uint8_t *dst[4];
1001 ff_progress_frame_await(&f->last_picture, INT_MAX);1001 ff_progress_frame_await(&f->last_picture, INT_MAX);
1002 for (j = 0; j < desc->nb_components; j++) {1002 for (int j = 0; j < desc->nb_components; j++) {
1003 int pixshift = desc->comp[j].depth > 8;1003 int pixshift = desc->comp[j].depth > 8;
1004 int sh = (j == 1 || j == 2) ? f->chroma_h_shift : 0;1004 int sh = (j == 1 || j == 2) ? f->chroma_h_shift : 0;
1005 int sv = (j == 1 || j == 2) ? f->chroma_v_shift : 0;1005 int sv = (j == 1 || j == 2) ? f->chroma_v_shift : 0;
@@ -1064,7 +1064,6 @@ static int update_thread_context(AVCodecContext *dst, const AVCodecContext *src) · 58 unmodified lines
1064{1064{
1065 FFV1Context *fsrc = src->priv_data;1065 FFV1Context *fsrc = src->priv_data;
1066 FFV1Context *fdst = dst->priv_data;1066 FFV1Context *fdst = dst->priv_data;
1067 int i;
1068 1067
1069 if (dst == src)1068 if (dst == src)
1070 return 0;1069 return 0;
@@ -1075,7 +1074,7 @@ static int update_thread_context(AVCodecContext *dst, const AVCodecContext *src) · 4 unmodified lines
1075 sizeof(fdst->state_transition));1074 sizeof(fdst->state_transition));
1076 memcpy(fdst->quant_table, fsrc->quant_table, sizeof(fsrc->quant_table));1075 memcpy(fdst->quant_table, fsrc->quant_table, sizeof(fsrc->quant_table));
1077 1076
1078 for (i = 0; i < fdst->num_h_slices * fdst->num_v_slices; i++) {1077 for (int i = 0; i < fdst->num_h_slices * fdst->num_v_slices; i++) {
1079 FFV1Context *fssrc = fsrc->slice_context[i];1078 FFV1Context *fssrc = fsrc->slice_context[i];
1080 FFV1Context *fsdst = fdst->slice_context[i];1079 FFV1Context *fsdst = fdst->slice_context[i];
1081 copy_fields(fsdst, fssrc, fsrc);1080 copy_fields(fsdst, fssrc, fsrc);

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