mirror of https://git.ffmpeg.org/ffmpeg.git
avcodec/h264dec: Constify H.264 decoder
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
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8e1bb594fb
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@ -282,7 +282,7 @@ static int8_t cavlc_level_tab[7][1<<LEVEL_TAB_BITS][2];
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* Get the predicted number of non-zero coefficients.
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* @param n block index
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*/
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static inline int pred_non_zero_count(const H264Context *h, H264SliceContext *sl, int n)
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static inline int pred_non_zero_count(const H264Context *h, const H264SliceContext *sl, int n)
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{
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const int index8= scan8[n];
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const int left = sl->non_zero_count_cache[index8 - 1];
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@ -34,7 +34,7 @@
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#include <assert.h>
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static int get_scale_factor(H264SliceContext *sl,
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static int get_scale_factor(const H264SliceContext *sl,
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int poc, int poc1, int i)
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{
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int poc0 = sl->ref_list[0][i].poc;
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@ -83,7 +83,7 @@ static void fill_colmap(const H264Context *h, H264SliceContext *sl,
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int map[2][16 + 32], int list,
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int field, int colfield, int mbafi)
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{
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H264Picture *const ref1 = sl->ref_list[1][0].parent;
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const H264Picture *const ref1 = sl->ref_list[1][0].parent;
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int j, old_ref, rfield;
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int start = mbafi ? 16 : 0;
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int end = mbafi ? 16 + 2 * sl->ref_count[0] : sl->ref_count[0];
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@ -150,7 +150,7 @@ void ff_h264_direct_ref_list_init(const H264Context *const h, H264SliceContext *
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if (h->picture_structure == PICT_FRAME) {
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int cur_poc = h->cur_pic_ptr->poc;
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int *col_poc = sl->ref_list[1][0].parent->field_poc;
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const int *col_poc = sl->ref_list[1][0].parent->field_poc;
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if (col_poc[0] == INT_MAX && col_poc[1] == INT_MAX) {
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av_log(h->avctx, AV_LOG_ERROR, "co located POCs unavailable\n");
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sl->col_parity = 1;
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@ -94,7 +94,7 @@ static void h264_copy_picture_params(H264Picture *dst, const H264Picture *src)
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dst->needs_fg = src->needs_fg;
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}
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int ff_h264_ref_picture(H264Context *h, H264Picture *dst, H264Picture *src)
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int ff_h264_ref_picture(H264Context *h, H264Picture *dst, const H264Picture *src)
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{
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int ret, i;
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@ -194,7 +194,7 @@ fail:
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return ret;
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}
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void ff_h264_set_erpic(ERPicture *dst, H264Picture *src)
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void ff_h264_set_erpic(ERPicture *dst, const H264Picture *src)
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{
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#if CONFIG_ERROR_RESILIENCE
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int i;
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@ -240,7 +240,7 @@ int ff_h264_field_end(H264Context *h, H264SliceContext *sl, int in_setup)
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av_log(avctx, AV_LOG_ERROR,
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"hardware accelerator failed to decode picture\n");
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} else if (!in_setup && cur->needs_fg && (!FIELD_PICTURE(h) || !h->first_field)) {
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AVFrameSideData *sd = av_frame_get_side_data(cur->f, AV_FRAME_DATA_FILM_GRAIN_PARAMS);
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const AVFrameSideData *sd = av_frame_get_side_data(cur->f, AV_FRAME_DATA_FILM_GRAIN_PARAMS);
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err = AVERROR_INVALIDDATA;
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if (sd) // a decoding error may have happened before the side data could be allocated
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@ -48,7 +48,7 @@ static void pic_as_field(H264Ref *pic, const int parity)
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pic->poc = pic->parent->field_poc[parity == PICT_BOTTOM_FIELD];
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}
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static void ref_from_h264pic(H264Ref *dst, H264Picture *src)
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static void ref_from_h264pic(H264Ref *dst, const H264Picture *src)
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{
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memcpy(dst->data, src->f->data, sizeof(dst->data));
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memcpy(dst->linesize, src->f->linesize, sizeof(dst->linesize));
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@ -58,7 +58,8 @@ static void ref_from_h264pic(H264Ref *dst, H264Picture *src)
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dst->parent = src;
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}
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static int split_field_copy(H264Ref *dest, H264Picture *src, int parity, int id_add)
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static int split_field_copy(H264Ref *dest, const H264Picture *src,
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int parity, int id_add)
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{
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int match = !!(src->reference & parity);
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@ -275,7 +276,7 @@ static void h264_fill_mbaff_ref_list(H264SliceContext *sl)
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int list, i, j;
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for (list = 0; list < sl->list_count; list++) {
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for (i = 0; i < sl->ref_count[list]; i++) {
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H264Ref *frame = &sl->ref_list[list][i];
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const H264Ref *frame = &sl->ref_list[list][i];
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H264Ref *field = &sl->ref_list[list][16 + 2 * i];
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field[0] = *frame;
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@ -266,7 +266,7 @@ fail:
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return (ret < 0) ? ret : AVERROR(ENOMEM);
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}
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static int find_unused_picture(H264Context *h)
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static int find_unused_picture(const H264Context *h)
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{
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int i;
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@ -285,9 +285,8 @@ static int find_unused_picture(H264Context *h)
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(pic) < (old_ctx)->DPB + H264_MAX_PICTURE_COUNT) ? \
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&(new_ctx)->DPB[(pic) - (old_ctx)->DPB] : NULL)
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static void copy_picture_range(H264Picture **to, H264Picture **from, int count,
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H264Context *new_base,
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H264Context *old_base)
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static void copy_picture_range(H264Picture **to, H264Picture *const *from, int count,
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H264Context *new_base, const H264Context *old_base)
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{
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int i;
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@ -583,8 +582,8 @@ FF_ENABLE_DEPRECATION_WARNINGS
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}
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static av_always_inline void backup_mb_border(const H264Context *h, H264SliceContext *sl,
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uint8_t *src_y,
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uint8_t *src_cb, uint8_t *src_cr,
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const uint8_t *src_y,
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const uint8_t *src_cb, const uint8_t *src_cr,
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int linesize, int uvlinesize,
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int simple)
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{
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@ -1185,7 +1184,7 @@ static int h264_export_frame_props(H264Context *h)
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}
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if (sps->pic_struct_present_flag && h->sei.picture_timing.present) {
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H264SEIPictureTiming *pt = &h->sei.picture_timing;
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const H264SEIPictureTiming *pt = &h->sei.picture_timing;
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switch (pt->pic_struct) {
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case H264_SEI_PIC_STRUCT_FRAME:
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break;
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@ -1983,7 +1982,7 @@ static int h264_slice_init(H264Context *h, H264SliceContext *sl,
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if (j < sl->list_count && i < sl->ref_count[j] &&
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sl->ref_list[j][i].parent->f->buf[0]) {
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int k;
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AVBuffer *buf = sl->ref_list[j][i].parent->f->buf[0]->buffer;
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const AVBuffer *buf = sl->ref_list[j][i].parent->f->buf[0]->buffer;
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for (k = 0; k < h->short_ref_count; k++)
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if (h->short_ref[k]->f->buf[0]->buffer == buf) {
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id_list[i] = k;
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@ -2178,9 +2177,9 @@ int ff_h264_get_slice_type(const H264SliceContext *sl)
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static av_always_inline void fill_filter_caches_inter(const H264Context *h,
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H264SliceContext *sl,
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int mb_type, int top_xy,
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int left_xy[LEFT_MBS],
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const int left_xy[LEFT_MBS],
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int top_type,
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int left_type[LEFT_MBS],
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const int left_type[LEFT_MBS],
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int mb_xy, int list)
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{
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int b_stride = h->b_stride;
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@ -2237,7 +2236,7 @@ static av_always_inline void fill_filter_caches_inter(const H264Context *h,
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}
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{
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int8_t *ref = &h->cur_pic.ref_index[list][4 * mb_xy];
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const int8_t *ref = &h->cur_pic.ref_index[list][4 * mb_xy];
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const int *ref2frm = &h->ref2frm[sl->slice_num & (MAX_SLICES - 1)][list][(MB_MBAFF(sl) ? 20 : 2)];
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uint32_t ref01 = (pack16to32(ref2frm[ref[0]], ref2frm[ref[1]]) & 0x00FF00FF) * 0x0101;
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uint32_t ref23 = (pack16to32(ref2frm[ref[2]], ref2frm[ref[3]]) & 0x00FF00FF) * 0x0101;
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@ -2264,7 +2263,7 @@ static int fill_filter_caches(const H264Context *h, H264SliceContext *sl, int mb
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const int mb_xy = sl->mb_xy;
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int top_xy, left_xy[LEFT_MBS];
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int top_type, left_type[LEFT_MBS];
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uint8_t *nnz;
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const uint8_t *nnz;
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uint8_t *nnz_cache;
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top_xy = mb_xy - (h->mb_stride << MB_FIELD(sl));
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@ -66,7 +66,7 @@ static void h264_er_decode_mb(void *opaque, int ref, int mv_dir, int mv_type,
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int (*mv)[2][4][2],
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int mb_x, int mb_y, int mb_intra, int mb_skipped)
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{
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H264Context *h = opaque;
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const H264Context *h = opaque;
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H264SliceContext *sl = &h->slice_ctx[0];
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sl->mb_x = mb_x;
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@ -832,7 +832,7 @@ static int get_consumed_bytes(int pos, int buf_size)
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return pos;
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}
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static int h264_export_enc_params(AVFrame *f, H264Picture *p)
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static int h264_export_enc_params(AVFrame *f, const H264Picture *p)
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{
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AVVideoEncParams *par;
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unsigned int nb_mb = p->mb_height * p->mb_width;
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@ -165,7 +165,7 @@ typedef struct H264Ref {
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int poc;
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int pic_id;
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H264Picture *parent;
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const H264Picture *parent;
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} H264Ref;
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typedef struct H264SliceContext {
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@ -653,7 +653,7 @@ static av_always_inline int get_chroma_qp(const PPS *pps, int t, int qscale)
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int ff_h264_field_end(H264Context *h, H264SliceContext *sl, int in_setup);
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int ff_h264_ref_picture(H264Context *h, H264Picture *dst, H264Picture *src);
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int ff_h264_ref_picture(H264Context *h, H264Picture *dst, const H264Picture *src);
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int ff_h264_replace_picture(H264Context *h, H264Picture *dst, const H264Picture *src);
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void ff_h264_unref_picture(H264Context *h, H264Picture *pic);
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@ -678,6 +678,6 @@ void ff_h264_flush_change(H264Context *h);
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void ff_h264_free_tables(H264Context *h);
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void ff_h264_set_erpic(ERPicture *dst, H264Picture *src);
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void ff_h264_set_erpic(ERPicture *dst, const H264Picture *src);
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#endif /* AVCODEC_H264DEC_H */
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