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jpeg2000: Factor out prec init
Makes debugging a little simpler.
This commit is contained in:
Luca Barbato
parent
95a41311ac
commit
570fcaf332
@ -244,6 +244,111 @@ static void init_band_stepsize(AVCodecContext *avctx,
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band->i_stepsize = band->f_stepsize * (1 << 16);
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}
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static int init_prec(Jpeg2000Band *band,
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Jpeg2000ResLevel *reslevel,
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Jpeg2000Component *comp,
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int precno, int bandno, int reslevelno,
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int log2_band_prec_width,
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int log2_band_prec_height)
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{
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Jpeg2000Prec *prec = band->prec + precno;
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int nb_codeblocks, cblkno;
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/* TODO: Explain formula for JPEG200 DCINEMA. */
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/* TODO: Verify with previous count of codeblocks per band */
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/* Compute P_x0 */
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prec->coord[0][0] = (precno % reslevel->num_precincts_x) *
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(1 << log2_band_prec_width);
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prec->coord[0][0] = FFMAX(prec->coord[0][0], band->coord[0][0]);
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/* Compute P_y0 */
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prec->coord[1][0] = (precno / reslevel->num_precincts_x) *
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(1 << log2_band_prec_height);
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prec->coord[1][0] = FFMAX(prec->coord[1][0], band->coord[1][0]);
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/* Compute P_x1 */
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prec->coord[0][1] = prec->coord[0][0] +
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(1 << log2_band_prec_width);
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prec->coord[0][1] = FFMIN(prec->coord[0][1], band->coord[0][1]);
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/* Compute P_y1 */
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prec->coord[1][1] = prec->coord[1][0] +
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(1 << log2_band_prec_height);
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prec->coord[1][1] = FFMIN(prec->coord[1][1], band->coord[1][1]);
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prec->nb_codeblocks_width =
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ff_jpeg2000_ceildivpow2(prec->coord[0][1] -
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prec->coord[0][0],
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band->log2_cblk_width);
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prec->nb_codeblocks_height =
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ff_jpeg2000_ceildivpow2(prec->coord[1][1] -
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prec->coord[1][0],
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band->log2_cblk_height);
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/* Tag trees initialization */
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prec->cblkincl =
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ff_jpeg2000_tag_tree_init(prec->nb_codeblocks_width,
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prec->nb_codeblocks_height);
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if (!prec->cblkincl)
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return AVERROR(ENOMEM);
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prec->zerobits =
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ff_jpeg2000_tag_tree_init(prec->nb_codeblocks_width,
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prec->nb_codeblocks_height);
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if (!prec->zerobits)
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return AVERROR(ENOMEM);
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nb_codeblocks = prec->nb_codeblocks_width * prec->nb_codeblocks_height;
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prec->cblk = av_mallocz_array(nb_codeblocks, sizeof(*prec->cblk));
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if (!prec->cblk)
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return AVERROR(ENOMEM);
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for (cblkno = 0; cblkno < nb_codeblocks; cblkno++) {
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Jpeg2000Cblk *cblk = prec->cblk + cblkno;
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uint16_t Cx0, Cy0;
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/* Compute coordinates of codeblocks */
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/* Compute Cx0*/
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Cx0 = (prec->coord[0][0] >> band->log2_cblk_width) << band->log2_cblk_width;
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Cx0 = Cx0 + ((cblkno % prec->nb_codeblocks_width) << band->log2_cblk_width);
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cblk->coord[0][0] = FFMAX(Cx0, prec->coord[0][0]);
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/* Compute Cy0*/
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Cy0 = (prec->coord[1][0] >> band->log2_cblk_height) << band->log2_cblk_height;
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Cy0 = Cy0 + ((cblkno / prec->nb_codeblocks_width) << band->log2_cblk_height);
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cblk->coord[1][0] = FFMAX(Cy0, prec->coord[1][0]);
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/* Compute Cx1 */
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cblk->coord[0][1] = FFMIN(Cx0 + (1 << band->log2_cblk_width),
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prec->coord[0][1]);
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/* Compute Cy1 */
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cblk->coord[1][1] = FFMIN(Cy0 + (1 << band->log2_cblk_height),
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prec->coord[1][1]);
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/* Update code-blocks coordinates according sub-band position */
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if ((bandno + !!reslevelno) & 1) {
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cblk->coord[0][0] += comp->reslevel[reslevelno-1].coord[0][1] -
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comp->reslevel[reslevelno-1].coord[0][0];
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cblk->coord[0][1] += comp->reslevel[reslevelno-1].coord[0][1] -
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comp->reslevel[reslevelno-1].coord[0][0];
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}
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if ((bandno + !!reslevelno) & 2) {
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cblk->coord[1][0] += comp->reslevel[reslevelno-1].coord[1][1] -
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comp->reslevel[reslevelno-1].coord[1][0];
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cblk->coord[1][1] += comp->reslevel[reslevelno-1].coord[1][1] -
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comp->reslevel[reslevelno-1].coord[1][0];
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}
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cblk->zero = 0;
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cblk->lblock = 3;
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cblk->length = 0;
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cblk->lengthinc = 0;
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cblk->npasses = 0;
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}
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return 0;
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}
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static int init_band(AVCodecContext *avctx,
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Jpeg2000ResLevel *reslevel,
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Jpeg2000Component *comp,
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@ -255,9 +360,9 @@ static int init_band(AVCodecContext *avctx,
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Jpeg2000Band *band = reslevel->band + bandno;
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uint8_t log2_band_prec_width, log2_band_prec_height;
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int declvl = codsty->nreslevels - reslevelno; // N_L -r see ISO/IEC 15444-1:2002 B.5
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int cblkno, precno;
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int precno;
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int nb_precincts;
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int i, j;
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int i, j, ret;
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init_band_stepsize(avctx, band, codsty, qntsty, bandno, gbandno, reslevelno, cbps);
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@ -314,100 +419,11 @@ static int init_band(AVCodecContext *avctx,
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return AVERROR(ENOMEM);
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for (precno = 0; precno < nb_precincts; precno++) {
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Jpeg2000Prec *prec = band->prec + precno;
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int nb_codeblocks;
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/* TODO: Explain formula for JPEG200 DCINEMA. */
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/* TODO: Verify with previous count of codeblocks per band */
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/* Compute P_x0 */
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prec->coord[0][0] = (precno % reslevel->num_precincts_x) *
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(1 << log2_band_prec_width);
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prec->coord[0][0] = FFMAX(prec->coord[0][0], band->coord[0][0]);
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/* Compute P_y0 */
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prec->coord[1][0] = (precno / reslevel->num_precincts_x) *
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(1 << log2_band_prec_height);
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prec->coord[1][0] = FFMAX(prec->coord[1][0], band->coord[1][0]);
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/* Compute P_x1 */
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prec->coord[0][1] = prec->coord[0][0] +
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(1 << log2_band_prec_width);
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prec->coord[0][1] = FFMIN(prec->coord[0][1], band->coord[0][1]);
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/* Compute P_y1 */
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prec->coord[1][1] = prec->coord[1][0] +
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(1 << log2_band_prec_height);
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prec->coord[1][1] = FFMIN(prec->coord[1][1], band->coord[1][1]);
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prec->nb_codeblocks_width =
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ff_jpeg2000_ceildivpow2(prec->coord[0][1] -
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prec->coord[0][0],
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band->log2_cblk_width);
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prec->nb_codeblocks_height =
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ff_jpeg2000_ceildivpow2(prec->coord[1][1] -
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prec->coord[1][0],
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band->log2_cblk_height);
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/* Tag trees initialization */
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prec->cblkincl =
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ff_jpeg2000_tag_tree_init(prec->nb_codeblocks_width,
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prec->nb_codeblocks_height);
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if (!prec->cblkincl)
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return AVERROR(ENOMEM);
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prec->zerobits =
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ff_jpeg2000_tag_tree_init(prec->nb_codeblocks_width,
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prec->nb_codeblocks_height);
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if (!prec->zerobits)
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return AVERROR(ENOMEM);
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nb_codeblocks = prec->nb_codeblocks_width * prec->nb_codeblocks_height;
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prec->cblk = av_mallocz_array(nb_codeblocks, sizeof(*prec->cblk));
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if (!prec->cblk)
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return AVERROR(ENOMEM);
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for (cblkno = 0; cblkno < nb_codeblocks; cblkno++) {
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Jpeg2000Cblk *cblk = prec->cblk + cblkno;
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uint16_t Cx0, Cy0;
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/* Compute coordinates of codeblocks */
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/* Compute Cx0*/
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Cx0 = (prec->coord[0][0] >> band->log2_cblk_width) << band->log2_cblk_width;
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Cx0 = Cx0 + ((cblkno % prec->nb_codeblocks_width) << band->log2_cblk_width);
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cblk->coord[0][0] = FFMAX(Cx0, prec->coord[0][0]);
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/* Compute Cy0*/
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Cy0 = (prec->coord[1][0] >> band->log2_cblk_height) << band->log2_cblk_height;
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Cy0 = Cy0 + ((cblkno / prec->nb_codeblocks_width) << band->log2_cblk_height);
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cblk->coord[1][0] = FFMAX(Cy0, prec->coord[1][0]);
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/* Compute Cx1 */
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cblk->coord[0][1] = FFMIN(Cx0 + (1 << band->log2_cblk_width),
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prec->coord[0][1]);
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/* Compute Cy1 */
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cblk->coord[1][1] = FFMIN(Cy0 + (1 << band->log2_cblk_height),
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prec->coord[1][1]);
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/* Update code-blocks coordinates according sub-band position */
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if ((bandno + !!reslevelno) & 1) {
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cblk->coord[0][0] += comp->reslevel[reslevelno-1].coord[0][1] -
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comp->reslevel[reslevelno-1].coord[0][0];
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cblk->coord[0][1] += comp->reslevel[reslevelno-1].coord[0][1] -
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comp->reslevel[reslevelno-1].coord[0][0];
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}
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if ((bandno + !!reslevelno) & 2) {
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cblk->coord[1][0] += comp->reslevel[reslevelno-1].coord[1][1] -
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comp->reslevel[reslevelno-1].coord[1][0];
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cblk->coord[1][1] += comp->reslevel[reslevelno-1].coord[1][1] -
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comp->reslevel[reslevelno-1].coord[1][0];
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}
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cblk->zero = 0;
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cblk->lblock = 3;
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cblk->length = 0;
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cblk->lengthinc = 0;
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cblk->npasses = 0;
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}
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ret = init_prec(band, reslevel, comp,
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precno, bandno, reslevelno,
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log2_band_prec_width, log2_band_prec_height);
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if (ret < 0)
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return ret;
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}
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return 0;
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