/*
* ClearVideo decoder
- * Copyright (c) 2012 Konstantin Shishkov
+ * Copyright (c) 2012-2018 Konstantin Shishkov
*
* This file is part of FFmpeg.
*
* ClearVideo decoder
*/
+#include "libavutil/mem_internal.h"
+#include "libavutil/thread.h"
+
#include "avcodec.h"
#include "bytestream.h"
#include "get_bits.h"
#include "idctdsp.h"
#include "internal.h"
-
-#define NUM_DC_CODES 127
-#define NUM_AC_CODES 103
-
-static const uint8_t clv_dc_codes[NUM_DC_CODES] = {
- 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
- 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
- 0x10, 0x11, 0x12, 0x13, 0x13, 0x14, 0x07, 0x0B,
- 0x0C, 0x08, 0x08, 0x09, 0x04, 0x06, 0x07, 0x05,
- 0x04, 0x05, 0x04, 0x06, 0x05, 0x06, 0x07, 0x05,
- 0x06, 0x07, 0x06, 0x07, 0x08, 0x06, 0x07, 0x08,
- 0x09, 0x0A, 0x0B, 0x07, 0x08, 0x09, 0x07, 0x08,
- 0x06, 0x07, 0x08, 0x06, 0x04, 0x05, 0x02, 0x01,
- 0x03, 0x06, 0x07, 0x07, 0x09, 0x0A, 0x0B, 0x09,
- 0x0A, 0x0B, 0x0A, 0x0B, 0x0C, 0x0D, 0x0C, 0x09,
- 0x0D, 0x0A, 0x0B, 0x08, 0x09, 0x0A, 0x0B, 0x07,
- 0x08, 0x09, 0x0A, 0x0B, 0x06, 0x07, 0x06, 0x08,
- 0x07, 0x09, 0x0A, 0x0B, 0x09, 0x0A, 0x0B, 0x0C,
- 0x14, 0x0D, 0x0D, 0x0E, 0x0F, 0x15, 0x15, 0x16,
- 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E,
- 0x1F, 0x20, 0x21, 0x22, 0x23, 0x24, 0x25,
-};
-
-static const uint8_t clv_dc_bits[NUM_DC_CODES] = {
- 22, 22, 22, 22, 22, 22, 22, 22,
- 22, 22, 22, 22, 22, 22, 22, 22,
- 22, 22, 22, 21, 22, 22, 19, 20,
- 20, 19, 18, 18, 15, 17, 17, 16,
- 14, 15, 12, 13, 14, 14, 14, 12,
- 12, 12, 11, 11, 11, 10, 10, 10,
- 10, 10, 10, 9, 9, 9, 8, 8,
- 7, 7, 7, 6, 5, 5, 3, 1,
- 3, 5, 5, 6, 7, 7, 7, 8,
- 8, 8, 9, 9, 9, 9, 10, 11,
- 10, 11, 11, 12, 12, 12, 12, 13,
- 14, 14, 14, 14, 15, 15, 16, 17,
- 16, 17, 18, 18, 19, 19, 19, 19,
- 21, 19, 20, 19, 19, 21, 22, 22,
- 22, 22, 22, 22, 22, 22, 22, 22,
- 22, 22, 22, 22, 22, 22, 22,
-};
-
-static const uint16_t clv_ac_syms[NUM_AC_CODES] = {
- 0x0001, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x0007, 0x0008,
- 0x0009, 0x000A, 0x000B, 0x000C, 0x0011, 0x0012, 0x0013, 0x0014,
- 0x0015, 0x0016, 0x0021, 0x0022, 0x0023, 0x0024, 0x0031, 0x0032,
- 0x0033, 0x0041, 0x0042, 0x0043, 0x0051, 0x0052, 0x0053, 0x0061,
- 0x0062, 0x0063, 0x0071, 0x0072, 0x0081, 0x0082, 0x0091, 0x0092,
- 0x00A1, 0x00A2, 0x00B1, 0x00C1, 0x00D1, 0x00E1, 0x00F1, 0x0101,
- 0x0111, 0x0121, 0x0131, 0x0141, 0x0151, 0x0161, 0x0171, 0x0181,
- 0x0191, 0x01A1, 0x1001, 0x1002, 0x1003, 0x1011, 0x1012, 0x1021,
- 0x1031, 0x1041, 0x1051, 0x1061, 0x1071, 0x1081, 0x1091, 0x10A1,
- 0x10B1, 0x10C1, 0x10D1, 0x10E1, 0x10F1, 0x1101, 0x1111, 0x1121,
- 0x1131, 0x1141, 0x1151, 0x1161, 0x1171, 0x1181, 0x1191, 0x11A1,
- 0x11B1, 0x11C1, 0x11D1, 0x11E1, 0x11F1, 0x1201, 0x1211, 0x1221,
- 0x1231, 0x1241, 0x1251, 0x1261, 0x1271, 0x1281, 0x1BFF,
-};
-
-static const uint8_t clv_ac_codes[NUM_AC_CODES] = {
- 0x02, 0x0F, 0x15, 0x17, 0x1F, 0x25, 0x24, 0x21,
- 0x20, 0x07, 0x06, 0x20, 0x06, 0x14, 0x1E, 0x0F,
- 0x21, 0x50, 0x0E, 0x1D, 0x0E, 0x51, 0x0D, 0x23,
- 0x0D, 0x0C, 0x22, 0x52, 0x0B, 0x0C, 0x53, 0x13,
- 0x0B, 0x54, 0x12, 0x0A, 0x11, 0x09, 0x10, 0x08,
- 0x16, 0x55, 0x15, 0x14, 0x1C, 0x1B, 0x21, 0x20,
- 0x1F, 0x1E, 0x1D, 0x1C, 0x1B, 0x1A, 0x22, 0x23,
- 0x56, 0x57, 0x07, 0x19, 0x05, 0x0F, 0x04, 0x0E,
- 0x0D, 0x0C, 0x13, 0x12, 0x11, 0x10, 0x1A, 0x19,
- 0x18, 0x17, 0x16, 0x15, 0x14, 0x13, 0x18, 0x17,
- 0x16, 0x15, 0x14, 0x13, 0x12, 0x11, 0x07, 0x06,
- 0x05, 0x04, 0x24, 0x25, 0x26, 0x27, 0x58, 0x59,
- 0x5A, 0x5B, 0x5C, 0x5D, 0x5E, 0x5F, 0x03,
-};
-
-static const uint8_t clv_ac_bits[NUM_AC_CODES] = {
- 2, 4, 6, 7, 8, 9, 9, 10,
- 10, 11, 11, 11, 3, 6, 8, 10,
- 11, 12, 4, 8, 10, 12, 5, 9,
- 10, 5, 9, 12, 5, 10, 12, 6,
- 10, 12, 6, 10, 6, 10, 6, 10,
- 7, 12, 7, 7, 8, 8, 9, 9,
- 9, 9, 9, 9, 9, 9, 11, 11,
- 12, 12, 4, 9, 11, 6, 11, 6,
- 6, 6, 7, 7, 7, 7, 8, 8,
- 8, 8, 8, 8, 8, 8, 9, 9,
- 9, 9, 9, 9, 9, 9, 10, 10,
- 10, 10, 11, 11, 11, 11, 12, 12,
- 12, 12, 12, 12, 12, 12, 7,
-};
+#include "mathops.h"
+#include "clearvideodata.h"
+
+#define CLV_VLC_BITS 9
+
+typedef struct LevelCodes {
+ VLC flags_cb;
+ VLC mv_cb;
+ VLC bias_cb;
+} LevelCodes;
+
+typedef struct MV {
+ int16_t x, y;
+} MV;
+
+static const MV zero_mv = { 0 };
+
+typedef struct MVInfo {
+ int mb_w;
+ int mb_h;
+ int mb_size;
+ int mb_stride;
+ int top;
+ MV *mv;
+} MVInfo;
+
+typedef struct TileInfo {
+ uint16_t flags;
+ int16_t bias;
+ MV mv;
+ struct TileInfo *child[4];
+} TileInfo;
typedef struct CLVContext {
AVCodecContext *avctx;
IDCTDSPContext idsp;
AVFrame *pic;
+ AVFrame *prev;
GetBitContext gb;
int mb_width, mb_height;
- VLC dc_vlc, ac_vlc;
+ int pmb_width, pmb_height;
+ MVInfo mvi;
+ int tile_size;
+ int tile_shift;
int luma_dc_quant, chroma_dc_quant, ac_quant;
DECLARE_ALIGNED(16, int16_t, block)[64];
int top_dc[3], left_dc[4];
- int iframes_warning;
} CLVContext;
+static VLC dc_vlc, ac_vlc;
+static LevelCodes lev[4 + 3 + 3]; // 0..3: Y, 4..6: U, 7..9: V
+static VLC_TYPE vlc_buf[16716][2];
+
static inline int decode_block(CLVContext *ctx, int16_t *blk, int has_ac,
int ac_quant)
{
int idx = 1, last = 0, val, skip;
memset(blk, 0, sizeof(*blk) * 64);
- blk[0] = get_vlc2(gb, ctx->dc_vlc.table, 9, 3);
- if (blk[0] < 0)
- return AVERROR_INVALIDDATA;
- blk[0] -= 63;
+ blk[0] = get_vlc2(gb, dc_vlc.table, CLV_VLC_BITS, 3);
if (!has_ac)
return 0;
while (idx < 64 && !last) {
- val = get_vlc2(gb, ctx->ac_vlc.table, 9, 2);
+ val = get_vlc2(gb, ac_vlc.table, CLV_VLC_BITS, 2);
if (val < 0)
return AVERROR_INVALIDDATA;
if (val != 0x1BFF) {
return 0;
}
+static int copy_block(AVCodecContext *avctx, AVFrame *dst, AVFrame *src,
+ int plane, int x, int y, int dx, int dy, int size)
+{
+ int shift = plane > 0;
+ int sx = x + dx;
+ int sy = y + dy;
+ int sstride, dstride, soff, doff;
+ uint8_t *sbuf, *dbuf;
+ int i;
+
+ if (x < 0 || sx < 0 || y < 0 || sy < 0 ||
+ x + size > avctx->coded_width >> shift ||
+ y + size > avctx->coded_height >> shift ||
+ sx + size > avctx->coded_width >> shift ||
+ sy + size > avctx->coded_height >> shift)
+ return AVERROR_INVALIDDATA;
+
+ sstride = src->linesize[plane];
+ dstride = dst->linesize[plane];
+ soff = sx + sy * sstride;
+ sbuf = src->data[plane];
+ doff = x + y * dstride;
+ dbuf = dst->data[plane];
+
+ for (i = 0; i < size; i++) {
+ uint8_t *dptr = &dbuf[doff];
+ uint8_t *sptr = &sbuf[soff];
+
+ memcpy(dptr, sptr, size);
+ doff += dstride;
+ soff += sstride;
+ }
+
+ return 0;
+}
+
+static int copyadd_block(AVCodecContext *avctx, AVFrame *dst, AVFrame *src,
+ int plane, int x, int y, int dx, int dy, int size, int bias)
+{
+ int shift = plane > 0;
+ int sx = x + dx;
+ int sy = y + dy;
+ int sstride = src->linesize[plane];
+ int dstride = dst->linesize[plane];
+ int soff = sx + sy * sstride;
+ uint8_t *sbuf = src->data[plane];
+ int doff = x + y * dstride;
+ uint8_t *dbuf = dst->data[plane];
+ int i, j;
+
+ if (x < 0 || sx < 0 || y < 0 || sy < 0 ||
+ x + size > avctx->coded_width >> shift ||
+ y + size > avctx->coded_height >> shift ||
+ sx + size > avctx->coded_width >> shift ||
+ sy + size > avctx->coded_height >> shift)
+ return AVERROR_INVALIDDATA;
+
+ for (j = 0; j < size; j++) {
+ uint8_t *dptr = &dbuf[doff];
+ uint8_t *sptr = &sbuf[soff];
+
+ for (i = 0; i < size; i++) {
+ int val = sptr[i] + bias;
+
+ dptr[i] = av_clip_uint8(val);
+ }
+
+ doff += dstride;
+ soff += sstride;
+ }
+
+ return 0;
+}
+
+static MV mvi_predict(MVInfo *mvi, int mb_x, int mb_y, MV diff)
+{
+ MV res, pred_mv;
+ int left_mv, right_mv, top_mv, bot_mv;
+
+ if (mvi->top) {
+ if (mb_x > 0) {
+ pred_mv = mvi->mv[mvi->mb_stride + mb_x - 1];
+ } else {
+ pred_mv = zero_mv;
+ }
+ } else if ((mb_x == 0) || (mb_x == mvi->mb_w - 1)) {
+ pred_mv = mvi->mv[mb_x];
+ } else {
+ MV A = mvi->mv[mvi->mb_stride + mb_x - 1];
+ MV B = mvi->mv[ mb_x ];
+ MV C = mvi->mv[ mb_x + 1];
+ pred_mv.x = mid_pred(A.x, B.x, C.x);
+ pred_mv.y = mid_pred(A.y, B.y, C.y);
+ }
+
+ res = pred_mv;
+
+ left_mv = -((mb_x * mvi->mb_size));
+ right_mv = ((mvi->mb_w - mb_x - 1) * mvi->mb_size);
+ if (res.x < left_mv) {
+ res.x = left_mv;
+ }
+ if (res.x > right_mv) {
+ res.x = right_mv;
+ }
+ top_mv = -((mb_y * mvi->mb_size));
+ bot_mv = ((mvi->mb_h - mb_y - 1) * mvi->mb_size);
+ if (res.y < top_mv) {
+ res.y = top_mv;
+ }
+ if (res.y > bot_mv) {
+ res.y = bot_mv;
+ }
+
+ mvi->mv[mvi->mb_stride + mb_x].x = res.x + diff.x;
+ mvi->mv[mvi->mb_stride + mb_x].y = res.y + diff.y;
+
+ return res;
+}
+
+static void mvi_reset(MVInfo *mvi, int mb_w, int mb_h, int mb_size)
+{
+ mvi->top = 1;
+ mvi->mb_w = mb_w;
+ mvi->mb_h = mb_h;
+ mvi->mb_size = mb_size;
+ mvi->mb_stride = mb_w;
+ memset(mvi->mv, 0, sizeof(MV) * mvi->mb_stride * 2);
+}
+
+static void mvi_update_row(MVInfo *mvi)
+{
+ int i;
+
+ mvi->top = 0;
+ for (i = 0 ; i < mvi->mb_stride; i++) {
+ mvi->mv[i] = mvi->mv[mvi->mb_stride + i];
+ }
+}
+
+static TileInfo *decode_tile_info(GetBitContext *gb, const LevelCodes *lc, int level)
+{
+ TileInfo *ti;
+ int i, flags = 0;
+ int16_t bias = 0;
+ MV mv = { 0 };
+
+ if (lc[level].flags_cb.table) {
+ flags = get_vlc2(gb, lc[level].flags_cb.table, CLV_VLC_BITS, 2);
+ }
+
+ if (lc[level].mv_cb.table) {
+ uint16_t mv_code = get_vlc2(gb, lc[level].mv_cb.table, CLV_VLC_BITS, 2);
+
+ if (mv_code != MV_ESC) {
+ mv.x = (int8_t)(mv_code & 0xff);
+ mv.y = (int8_t)(mv_code >> 8);
+ } else {
+ mv.x = get_sbits(gb, 8);
+ mv.y = get_sbits(gb, 8);
+ }
+ }
+
+ if (lc[level].bias_cb.table) {
+ uint16_t bias_val = get_vlc2(gb, lc[level].bias_cb.table, CLV_VLC_BITS, 2);
+
+ if (bias_val != BIAS_ESC) {
+ bias = (int16_t)(bias_val);
+ } else {
+ bias = get_sbits(gb, 16);
+ }
+ }
+
+ ti = av_calloc(1, sizeof(*ti));
+ if (!ti)
+ return NULL;
+
+ ti->flags = flags;
+ ti->mv = mv;
+ ti->bias = bias;
+
+ if (ti->flags) {
+ for (i = 0; i < 4; i++) {
+ if (ti->flags & (1 << i)) {
+ TileInfo *subti = decode_tile_info(gb, lc, level + 1);
+ ti->child[i] = subti;
+ }
+ }
+ }
+
+ return ti;
+}
+
+static int tile_do_block(AVCodecContext *avctx, AVFrame *dst, AVFrame *src,
+ int plane, int x, int y, int dx, int dy, int size, int bias)
+{
+ int ret;
+
+ if (!bias) {
+ ret = copy_block(avctx, dst, src, plane, x, y, dx, dy, size);
+ } else {
+ ret = copyadd_block(avctx, dst, src, plane, x, y, dx, dy, size, bias);
+ }
+
+ return ret;
+}
+
+static int restore_tree(AVCodecContext *avctx, AVFrame *dst, AVFrame *src,
+ int plane, int x, int y, int size,
+ TileInfo *tile, MV root_mv)
+{
+ int ret;
+ MV mv;
+
+ mv.x = root_mv.x + tile->mv.x;
+ mv.y = root_mv.y + tile->mv.y;
+
+ if (!tile->flags) {
+ ret = tile_do_block(avctx, dst, src, plane, x, y, mv.x, mv.y, size, tile->bias);
+ } else {
+ int i, hsize = size >> 1;
+
+ for (i = 0; i < 4; i++) {
+ int xoff = (i & 2) == 0 ? 0 : hsize;
+ int yoff = (i & 1) == 0 ? 0 : hsize;
+
+ if (tile->child[i]) {
+ ret = restore_tree(avctx, dst, src, plane, x + xoff, y + yoff, hsize, tile->child[i], root_mv);
+ av_freep(&tile->child[i]);
+ } else {
+ ret = tile_do_block(avctx, dst, src, plane, x + xoff, y + yoff, mv.x, mv.y, hsize, tile->bias);
+ }
+ }
+ }
+
+ return ret;
+}
+
+static void extend_edges(AVFrame *buf, int tile_size)
+{
+ int comp, i, j;
+
+ for (comp = 0; comp < 3; comp++) {
+ int shift = comp > 0;
+ int w = buf->width >> shift;
+ int h = buf->height >> shift;
+ int size = comp == 0 ? tile_size : tile_size >> 1;
+ int stride = buf->linesize[comp];
+ uint8_t *framebuf = buf->data[comp];
+
+ int right = size - (w & (size - 1));
+ int bottom = size - (h & (size - 1));
+
+ if ((right == size) && (bottom == size)) {
+ return;
+ }
+ if (right != size) {
+ int off = w;
+ for (j = 0; j < h; j++) {
+ for (i = 0; i < right; i++) {
+ framebuf[off + i] = 0x80;
+ }
+ off += stride;
+ }
+ }
+ if (bottom != size) {
+ int off = h * stride;
+ for (j = 0; j < bottom; j++) {
+ for (i = 0; i < stride; i++) {
+ framebuf[off + i] = 0x80;
+ }
+ off += stride;
+ }
+ }
+ }
+}
+
static int clv_decode_frame(AVCodecContext *avctx, void *data,
int *got_frame, AVPacket *avpkt)
{
frame_type = bytestream2_get_byte(&gb);
- if (frame_type & 0x2) {
+ if ((frame_type & 0x7f) == 0x30) {
+ *got_frame = 0;
+ return buf_size;
+ } else if (frame_type & 0x2) {
if (buf_size < c->mb_width * c->mb_height) {
av_log(avctx, AV_LOG_ERROR, "Packet too small\n");
return AVERROR_INVALIDDATA;
}
- if ((ret = ff_reget_buffer(avctx, c->pic)) < 0)
+ if ((ret = ff_reget_buffer(avctx, c->pic, 0)) < 0)
return ret;
- c->pic->key_frame = frame_type & 0x20 ? 1 : 0;
- c->pic->pict_type = frame_type & 0x20 ? AV_PICTURE_TYPE_I
- : AV_PICTURE_TYPE_P;
+ c->pic->key_frame = 1;
+ c->pic->pict_type = AV_PICTURE_TYPE_I;
bytestream2_get_be32(&gb); // frame size;
c->ac_quant = bytestream2_get_byte(&gb);
mb_ret = ret;
}
}
+ extend_edges(c->pic, c->tile_size);
+ } else {
+ int plane;
- if ((ret = av_frame_ref(data, c->pic)) < 0)
+ if (c->pmb_width * c->pmb_height > 8LL*(buf_size - bytestream2_tell(&gb)))
+ return AVERROR_INVALIDDATA;
+
+ if ((ret = ff_reget_buffer(avctx, c->pic, 0)) < 0)
return ret;
- *got_frame = 1;
- } else {
- if (!c->iframes_warning)
- avpriv_report_missing_feature(avctx, "Non-I-frames in Clearvideo");
- c->iframes_warning = 1;
- return AVERROR_PATCHWELCOME;
+ ret = av_frame_copy(c->pic, c->prev);
+ if (ret < 0)
+ return ret;
+
+ if ((ret = init_get_bits8(&c->gb, buf + bytestream2_tell(&gb),
+ buf_size - bytestream2_tell(&gb))) < 0)
+ return ret;
+
+ mvi_reset(&c->mvi, c->pmb_width, c->pmb_height, 1 << c->tile_shift);
+
+ for (j = 0; j < c->pmb_height; j++) {
+ for (i = 0; i < c->pmb_width; i++) {
+ if (get_bits_left(&c->gb) <= 0)
+ return AVERROR_INVALIDDATA;
+ if (get_bits1(&c->gb)) {
+ MV mv = mvi_predict(&c->mvi, i, j, zero_mv);
+
+ for (plane = 0; plane < 3; plane++) {
+ int16_t x = plane == 0 ? i << c->tile_shift : i << (c->tile_shift - 1);
+ int16_t y = plane == 0 ? j << c->tile_shift : j << (c->tile_shift - 1);
+ int16_t size = plane == 0 ? 1 << c->tile_shift : 1 << (c->tile_shift - 1);
+ int16_t mx = plane == 0 ? mv.x : mv.x / 2;
+ int16_t my = plane == 0 ? mv.y : mv.y / 2;
+
+ ret = copy_block(avctx, c->pic, c->prev, plane, x, y, mx, my, size);
+ if (ret < 0)
+ mb_ret = ret;
+ }
+ } else {
+ int x = i << c->tile_shift;
+ int y = j << c->tile_shift;
+ int size = 1 << c->tile_shift;
+ TileInfo *tile;
+ MV mv, cmv;
+
+ tile = decode_tile_info(&c->gb, &lev[0], 0); // Y
+ if (!tile)
+ return AVERROR(ENOMEM);
+ mv = mvi_predict(&c->mvi, i, j, tile->mv);
+ ret = restore_tree(avctx, c->pic, c->prev, 0, x, y, size, tile, mv);
+ if (ret < 0)
+ mb_ret = ret;
+ x = i << (c->tile_shift - 1);
+ y = j << (c->tile_shift - 1);
+ size = 1 << (c->tile_shift - 1);
+ cmv.x = mv.x + tile->mv.x;
+ cmv.y = mv.y + tile->mv.y;
+ cmv.x /= 2;
+ cmv.y /= 2;
+ av_freep(&tile);
+ tile = decode_tile_info(&c->gb, &lev[4], 0); // U
+ if (!tile)
+ return AVERROR(ENOMEM);
+ ret = restore_tree(avctx, c->pic, c->prev, 1, x, y, size, tile, cmv);
+ if (ret < 0)
+ mb_ret = ret;
+ av_freep(&tile);
+ tile = decode_tile_info(&c->gb, &lev[7], 0); // V
+ if (!tile)
+ return AVERROR(ENOMEM);
+ ret = restore_tree(avctx, c->pic, c->prev, 2, x, y, size, tile, cmv);
+ if (ret < 0)
+ mb_ret = ret;
+ av_freep(&tile);
+ }
+ }
+ mvi_update_row(&c->mvi);
+ }
+ extend_edges(c->pic, c->tile_size);
+
+ c->pic->key_frame = 0;
+ c->pic->pict_type = AV_PICTURE_TYPE_P;
}
+ if ((ret = av_frame_ref(data, c->pic)) < 0)
+ return ret;
+
+ FFSWAP(AVFrame *, c->pic, c->prev);
+
+ *got_frame = 1;
+
+ if (get_bits_left(&c->gb) < 0)
+ av_log(c->avctx, AV_LOG_WARNING, "overread %d\n", -get_bits_left(&c->gb));
+
return mb_ret < 0 ? mb_ret : buf_size;
}
+static av_cold void build_vlc(VLC *vlc, const uint8_t counts[16],
+ const uint16_t **syms, unsigned *offset)
+{
+ uint8_t lens[MAX_VLC_ENTRIES];
+ unsigned num = 0;
+
+ for (int i = 0; i < 16; i++) {
+ unsigned count = counts[i];
+ if (count == 255) /* Special case for Y_3 table */
+ count = 303;
+ for (count += num; num < count; num++)
+ lens[num] = i + 1;
+ }
+ vlc->table = &vlc_buf[*offset];
+ vlc->table_allocated = FF_ARRAY_ELEMS(vlc_buf) - *offset;
+ ff_init_vlc_from_lengths(vlc, CLV_VLC_BITS, num, lens, 1,
+ *syms, 2, 2, 0, INIT_VLC_STATIC_OVERLONG, NULL);
+ *syms += num;
+ *offset += vlc->table_size;
+}
+
+static av_cold void clv_init_static(void)
+{
+ const uint16_t *mv_syms = clv_mv_syms, *bias_syms = clv_bias_syms;
+
+ INIT_VLC_STATIC_FROM_LENGTHS(&dc_vlc, CLV_VLC_BITS, NUM_DC_CODES,
+ clv_dc_lens, 1,
+ clv_dc_syms, 1, 1, -63, 0, 1104);
+ INIT_VLC_STATIC_FROM_LENGTHS(&ac_vlc, CLV_VLC_BITS, NUM_AC_CODES,
+ clv_ac_bits, 1,
+ clv_ac_syms, 2, 2, 0, 0, 554);
+ for (unsigned i = 0, j = 0, k = 0, offset = 0;; i++) {
+ if (0x36F & (1 << i)) {
+ build_vlc(&lev[i].mv_cb, clv_mv_len_counts[k], &mv_syms, &offset);
+ k++;
+ }
+ if (i == FF_ARRAY_ELEMS(lev) - 1)
+ break;
+ if (0x1B7 & (1 << i)) {
+ lev[i].flags_cb.table = &vlc_buf[offset];
+ lev[i].flags_cb.table_allocated = FF_ARRAY_ELEMS(vlc_buf) - offset;
+ ff_init_vlc_from_lengths(&lev[i].flags_cb, CLV_VLC_BITS, 16,
+ clv_flags_bits[j], 1,
+ clv_flags_syms[j], 1, 1,
+ 0, INIT_VLC_STATIC_OVERLONG, NULL);
+ offset += lev[i].flags_cb.table_size;
+
+ build_vlc(&lev[i + 1].bias_cb, clv_bias_len_counts[j],
+ &bias_syms, &offset);
+ j++;
+ }
+ }
+}
+
static av_cold int clv_decode_init(AVCodecContext *avctx)
{
+ static AVOnce init_static_once = AV_ONCE_INIT;
CLVContext *const c = avctx->priv_data;
- int ret;
+ int ret, w, h;
+
+ if (avctx->extradata_size == 110) {
+ c->tile_size = AV_RL32(&avctx->extradata[94]);
+ } else if (avctx->extradata_size == 150) {
+ c->tile_size = AV_RB32(&avctx->extradata[134]);
+ } else if (!avctx->extradata_size) {
+ c->tile_size = 16;
+ } else {
+ av_log(avctx, AV_LOG_ERROR, "Unsupported extradata size: %d\n", avctx->extradata_size);
+ return AVERROR_INVALIDDATA;
+ }
+
+ c->tile_shift = av_log2(c->tile_size);
+ if (1U << c->tile_shift != c->tile_size) {
+ av_log(avctx, AV_LOG_ERROR, "Tile size: %d, is not power of 2.\n", c->tile_size);
+ return AVERROR_INVALIDDATA;
+ }
avctx->pix_fmt = AV_PIX_FMT_YUV420P;
+ w = avctx->width;
+ h = avctx->height;
+ ret = ff_set_dimensions(avctx, FFALIGN(w, 1 << c->tile_shift), FFALIGN(h, 1 << c->tile_shift));
+ if (ret < 0)
+ return ret;
+ avctx->width = w;
+ avctx->height = h;
c->avctx = avctx;
c->mb_width = FFALIGN(avctx->width, 16) >> 4;
c->mb_height = FFALIGN(avctx->height, 16) >> 4;
- c->iframes_warning = 0;
+ c->pmb_width = (w + c->tile_size - 1) >> c->tile_shift;
+ c->pmb_height = (h + c->tile_size - 1) >> c->tile_shift;
c->pic = av_frame_alloc();
- if (!c->pic)
+ c->prev = av_frame_alloc();
+ c->mvi.mv = av_calloc(c->pmb_width * 2, sizeof(*c->mvi.mv));
+ if (!c->pic || !c->prev || !c->mvi.mv)
return AVERROR(ENOMEM);
ff_idctdsp_init(&c->idsp, avctx);
- ret = init_vlc(&c->dc_vlc, 9, NUM_DC_CODES,
- clv_dc_bits, 1, 1,
- clv_dc_codes, 1, 1, 0);
- if (ret) {
- av_log(avctx, AV_LOG_ERROR, "Error initialising DC VLC\n");
- return ret;
- }
- ret = ff_init_vlc_sparse(&c->ac_vlc, 9, NUM_AC_CODES,
- clv_ac_bits, 1, 1,
- clv_ac_codes, 1, 1,
- clv_ac_syms, 2, 2, 0);
- if (ret) {
- av_log(avctx, AV_LOG_ERROR, "Error initialising AC VLC\n");
- return ret;
- }
+
+ ff_thread_once(&init_static_once, clv_init_static);
return 0;
}
{
CLVContext *const c = avctx->priv_data;
+ av_frame_free(&c->prev);
av_frame_free(&c->pic);
- ff_free_vlc(&c->dc_vlc);
- ff_free_vlc(&c->ac_vlc);
+ av_freep(&c->mvi.mv);
return 0;
}
-AVCodec ff_clearvideo_decoder = {
+const AVCodec ff_clearvideo_decoder = {
.name = "clearvideo",
.long_name = NULL_IF_CONFIG_SMALL("Iterated Systems ClearVideo"),
.type = AVMEDIA_TYPE_VIDEO,
projects / ffmpeg / blobdiff