From cdb86136f764e22e795b01eb1cea65403e68cff5 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Thu, 30 May 2013 21:12:14 +0200 Subject: [PATCH] j2k/jpeg2000: merge some of the tilepart related code Signed-off-by: Michael Niedermayer --- libavcodec/j2kdec.c | 64 +++++++++++++++++++++++++++++++++++----- libavcodec/jpeg2000dec.c | 5 +++- 2 files changed, 60 insertions(+), 9 deletions(-) diff --git a/libavcodec/j2kdec.c b/libavcodec/j2kdec.c index 74095250f2d..e9fbc7d48cd 100644 --- a/libavcodec/j2kdec.c +++ b/libavcodec/j2kdec.c @@ -42,11 +42,21 @@ #define HAD_COC 0x01 #define HAD_QCC 0x02 +typedef struct Jpeg2000TilePart { + uint16_t tp_idx; // Tile-part index + uint8_t tile_index; // Tile index who refers the tile-part + uint32_t tp_len; // Length of tile-part + GetByteContext tpg; // bit stream in tile-part +} Jpeg2000TilePart; + +/* RMK: For JPEG2000 DCINEMA 3 tile-parts in a tile + * one per component, so tile_part elements have a size of 3 */ typedef struct Jpeg2000Tile { Jpeg2000Component *comp; uint8_t properties[4]; Jpeg2000CodingStyle codsty[4]; Jpeg2000QuantStyle qntsty[4]; + Jpeg2000TilePart tile_part[3]; } Jpeg2000Tile; typedef struct Jpeg2000DecoderContext { @@ -427,28 +437,45 @@ static int get_qcc(Jpeg2000DecoderContext *s, int n, Jpeg2000QuantStyle *q, return get_qcx(s, n - 1, q + compno); } -/* get start of tile segment */ -static int get_sot(Jpeg2000DecoderContext *s) +/* Get start of tile segment. */ +static int get_sot(Jpeg2000DecoderContext *s, int n) { + Jpeg2000TilePart *tp; + uint16_t Isot; + uint32_t Psot; + uint8_t TPsot; + if (bytestream2_get_bytes_left(&s->g) < 8) return AVERROR(EINVAL); - s->curtileno = bytestream2_get_be16u(&s->g); ///< Isot + s->curtileno = Isot = bytestream2_get_be16u(&s->g); // Isot if ((unsigned)s->curtileno >= s->numXtiles * s->numYtiles) { s->curtileno=0; return AVERROR(EINVAL); } + Psot = bytestream2_get_be32u(&s->g); // Psot + TPsot = bytestream2_get_byteu(&s->g); // TPsot + + /* Read TNSot but not used */ + bytestream2_get_byteu(&s->g); // TNsot + + if (TPsot >= FF_ARRAY_ELEMS(s->tile[s->curtileno].tile_part)) { + av_log(s->avctx, AV_LOG_ERROR, "TPsot %d too big\n", TPsot); + return AVERROR_PATCHWELCOME; + } - bytestream2_skipu(&s->g, 4); ///< Psot (ignored) + tp = s->tile[s->curtileno].tile_part + TPsot; + tp->tile_index = Isot; + tp->tp_len = Psot; + tp->tp_idx = TPsot; - if (!bytestream2_get_byteu(&s->g)) { ///< TPsot + if (!TPsot) { Jpeg2000Tile *tile = s->tile + s->curtileno; /* copy defaults */ memcpy(tile->codsty, s->codsty, s->ncomponents * sizeof(Jpeg2000CodingStyle)); memcpy(tile->qntsty, s->qntsty, s->ncomponents * sizeof(Jpeg2000QuantStyle)); } - bytestream2_get_byteu(&s->g); ///< TNsot return 0; } @@ -526,7 +553,7 @@ static int init_tile(Jpeg2000DecoderContext *s, int tileno) return 0; } -/* read the number of coding passes */ +/* Read the number of coding passes. */ static int getnpasses(Jpeg2000DecoderContext *s) { int num; @@ -835,6 +862,12 @@ static int decode_cblk(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *codsty, return 0; } +/* TODO: Verify dequantization for lossless case + * comp->data can be float or int + * band->stepsize can be float or int + * depending on the type of DWT transformation. + * see ISO/IEC 15444-1:2002 A.6.1 */ + /* Float dequantization of a codeblock.*/ static void dequantization_float(int x, int y, Jpeg2000Cblk *cblk, Jpeg2000Component *comp, @@ -985,6 +1018,7 @@ static int jpeg2000_decode_tile(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile, } /* end band */ } /* end reslevel */ + /* inverse DWT */ ff_dwt_decode(&comp->dwt, codsty->transform == FF_DWT97 ? (void*)comp->f_data : (void*)comp->i_data); } /*end comp */ @@ -1128,7 +1162,7 @@ static int jpeg2000_decode_codestream(Jpeg2000DecoderContext *s) ret = get_qcd(s, len, qntsty, properties); break; case JPEG2000_SOT: - if (!(ret = get_sot(s))) { + if (!(ret = get_sot(s, len))) { codsty = s->tile[s->curtileno].codsty; qntsty = s->tile[s->curtileno].qntsty; properties = s->tile[s->curtileno].properties; @@ -1158,6 +1192,20 @@ static int jpeg2000_decode_codestream(Jpeg2000DecoderContext *s) return 0; } +/* Read bit stream packets --> T2 operation. */ +static int jpeg2000_read_bitstream_packets(Jpeg2000DecoderContext *s) +{ + int ret = 0; + Jpeg2000Tile *tile = s->tile + s->curtileno; + + if (ret = init_tile(s, s->curtileno)) + return ret; + if (ret = jpeg2000_decode_packets(s, tile)) + return ret; + + return 0; +} + static int jp2_find_codestream(Jpeg2000DecoderContext *s) { uint32_t atom_size, atom; diff --git a/libavcodec/jpeg2000dec.c b/libavcodec/jpeg2000dec.c index bb8b0cc8034..e2765fecfc7 100644 --- a/libavcodec/jpeg2000dec.c +++ b/libavcodec/jpeg2000dec.c @@ -975,6 +975,7 @@ static void mct_decode(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile) for (i = 0; i < 2; i++) csize *= tile->comp[0].coord[i][1] - tile->comp[0].coord[i][0]; + switch (tile->codsty[0].transform) { case FF_DWT97: for (i = 0; i < csize; i++) { @@ -1024,12 +1025,13 @@ static int jpeg2000_decode_tile(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile, for (compno = 0; compno < s->ncomponents; compno++) { Jpeg2000Component *comp = tile->comp + compno; Jpeg2000CodingStyle *codsty = tile->codsty + compno; + /* Loop on resolution levels */ for (reslevelno = 0; reslevelno < codsty->nreslevels2decode; reslevelno++) { Jpeg2000ResLevel *rlevel = comp->reslevel + reslevelno; /* Loop on bands */ for (bandno = 0; bandno < rlevel->nbands; bandno++) { - uint16_t nb_precincts, precno; + int nb_precincts, precno; Jpeg2000Band *band = rlevel->band + bandno; int cblkno = 0, bandpos; bandpos = bandno + (reslevelno > 0); @@ -1110,6 +1112,7 @@ static int jpeg2000_decode_tile(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile, linel = (uint16_t *)picture->data[0] + y * (picture->linesize[0] >> 1); for (; y < tile->comp[compno].coord[1][1] - s->image_offset_y; y += s->cdy[compno]) { uint16_t *dst; + x = tile->comp[compno].coord[0][0] - s->image_offset_x; dst = linel + (x * s->ncomponents + compno); for (; x < s->avctx->width; x += s->cdx[compno]) { -- 2.39.2