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avcodec/clearvideo: Avoid allocations when decoding tiles
Up until now, the ClearVideo decoder separates parsing tiles and actually using the parsed information: The information is instead stored in structures which are constantly allocated and freed. This commit changes this to use the information immediately, avoiding said allocations. This e.g. reduced the amount of allocations for [1] from 2,866,462 to 24,720. For said sample decoding speed improved by 143%. [1]: https://samples.ffmpeg.org/V-codecs/UCOD/AccordianDance-300.avi Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt
parent
165682a6d4
commit
65f3bc9e7e
@ -59,13 +59,6 @@ typedef struct MVInfo {
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MV *mv;
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} MVInfo;
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typedef struct TileInfo {
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uint16_t flags;
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int16_t bias;
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MV mv;
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struct TileInfo *child[4];
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} TileInfo;
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typedef struct CLVContext {
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AVCodecContext *avctx;
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IDCTDSPContext idsp;
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@ -383,12 +376,16 @@ static int tile_do_block(AVCodecContext *avctx, AVFrame *dst, const AVFrame *src
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return ret;
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}
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static TileInfo *decode_tile_info(GetBitContext *gb, const LevelCodes *lc)
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static int decode_tile(AVCodecContext *avctx, GetBitContext *gb,
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const LevelCodes *lc,
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AVFrame *dst, const AVFrame *src,
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int plane, int x, int y, int size,
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MV root_mv, MV *pred)
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{
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TileInfo *ti;
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int i, flags = 0;
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int16_t bias = 0;
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MV mv = { 0 };
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int err;
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if (lc->flags_cb.table)
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flags = get_vlc2(gb, lc->flags_cb.table, CLV_VLC_BITS, 2);
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@ -403,7 +400,11 @@ static TileInfo *decode_tile_info(GetBitContext *gb, const LevelCodes *lc)
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mv.x = get_sbits(gb, 8);
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mv.y = get_sbits(gb, 8);
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}
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if (pred)
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mvi_update_prediction(pred, mv);
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}
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mv.x += root_mv.x;
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mv.y += root_mv.y;
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if (lc->bias_cb.table) {
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uint16_t bias_val = get_vlc2(gb, lc->bias_cb.table, CLV_VLC_BITS, 2);
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@ -415,55 +416,29 @@ static TileInfo *decode_tile_info(GetBitContext *gb, const LevelCodes *lc)
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}
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}
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ti = av_calloc(1, sizeof(*ti));
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if (!ti)
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return NULL;
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ti->flags = flags;
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ti->mv = mv;
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ti->bias = bias;
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if (ti->flags) {
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for (i = 0; i < 4; i++) {
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if (ti->flags & (1 << i)) {
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TileInfo *subti = decode_tile_info(gb, lc + 1);
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ti->child[i] = subti;
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}
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}
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}
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return ti;
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}
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static int restore_tree(AVCodecContext *avctx, AVFrame *dst, AVFrame *src,
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int plane, int x, int y, int size,
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TileInfo *tile, MV root_mv)
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{
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int ret;
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MV mv;
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mv.x = root_mv.x + tile->mv.x;
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mv.y = root_mv.y + tile->mv.y;
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if (!tile->flags) {
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ret = tile_do_block(avctx, dst, src, plane, x, y, mv.x, mv.y, size, tile->bias);
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} else {
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int i, hsize = size >> 1;
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if (flags) {
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int hsize = size >> 1;
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for (i = 0; i < 4; i++) {
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int xoff = (i & 2) == 0 ? 0 : hsize;
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int yoff = (i & 1) == 0 ? 0 : hsize;
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if (tile->child[i]) {
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ret = restore_tree(avctx, dst, src, plane, x + xoff, y + yoff, hsize, tile->child[i], root_mv);
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av_freep(&tile->child[i]);
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if (flags & (1 << i)) {
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err = decode_tile(avctx, gb, lc + 1, dst, src, plane,
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x + xoff, y + yoff, hsize, root_mv, NULL);
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} else {
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ret = tile_do_block(avctx, dst, src, plane, x + xoff, y + yoff, mv.x, mv.y, hsize, tile->bias);
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err = tile_do_block(avctx, dst, src, plane, x + xoff, y + yoff,
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mv.x, mv.y, hsize, bias);
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}
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if (err < 0)
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return err;
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}
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} else {
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err = tile_do_block(avctx, dst, src, plane, x, y, mv.x, mv.y, size, bias);
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if (err < 0)
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return err;
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}
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return ret;
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return 0;
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}
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static void extend_edges(AVFrame *buf, int tile_size)
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@ -604,38 +579,26 @@ static int clv_decode_frame(AVCodecContext *avctx, AVFrame *rframe,
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int x = i << c->tile_shift;
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int y = j << c->tile_shift;
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int size = 1 << c->tile_shift;
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TileInfo *tile;
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MV cmv;
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tile = decode_tile_info(&c->gb, &lev[0]); // Y
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if (!tile)
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return AVERROR(ENOMEM);
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ret = restore_tree(avctx, c->pic, c->prev, 0, x, y, size, tile, mv);
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ret = decode_tile(avctx, &c->gb, &lev[0], c->pic, c->prev, // Y
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0, x, y, size, mv, mvp);
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if (ret < 0)
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mb_ret = ret;
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mvi_update_prediction(mvp, tile->mv);
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x = i << (c->tile_shift - 1);
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y = j << (c->tile_shift - 1);
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size = 1 << (c->tile_shift - 1);
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cmv.x = mv.x + tile->mv.x;
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cmv.y = mv.y + tile->mv.y;
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cmv = *mvp;
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cmv.x /= 2;
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cmv.y /= 2;
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av_freep(&tile);
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tile = decode_tile_info(&c->gb, &lev[4]); // U
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if (!tile)
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return AVERROR(ENOMEM);
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ret = restore_tree(avctx, c->pic, c->prev, 1, x, y, size, tile, cmv);
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ret = decode_tile(avctx, &c->gb, &lev[4], c->pic, c->prev, // U
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1, x, y, size, cmv, NULL);
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if (ret < 0)
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mb_ret = ret;
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av_freep(&tile);
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tile = decode_tile_info(&c->gb, &lev[7]); // V
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if (!tile)
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return AVERROR(ENOMEM);
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ret = restore_tree(avctx, c->pic, c->prev, 2, x, y, size, tile, cmv);
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ret = decode_tile(avctx, &c->gb, &lev[7], c->pic, c->prev, // U
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2, x, y, size, cmv, NULL);
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if (ret < 0)
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mb_ret = ret;
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av_freep(&tile);
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}
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}
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mvi_update_row(&c->mvi);
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