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| author | Kostya Shishkov <kostya.shishkov@gmail.com> | 2014-02-08 13:39:32 +0100 |
|---|---|---|
| committer | Kostya Shishkov <kostya.shishkov@gmail.com> | 2014-02-11 12:46:27 +0100 |
| commit | 6477449243db4aab15a4db356e8354c60b5366ec (patch) | |
| tree | 86a291ec570fc60b3226eb2188a975666349e45a /libavcodec/g2meet.c | |
| parent | d6d78518018a12fb495baab5663708a830f3aab6 (diff) | |
| download | ffmpeg-6477449243db4aab15a4db356e8354c60b5366ec.tar.gz | |
g2meet: make JPEG tile decoder operate on 8x8 block mask
This is needed for upcoming Go2Meeting (G2M2/G2M3) decoder.
Diffstat (limited to 'libavcodec/g2meet.c')
| -rw-r--r-- | libavcodec/g2meet.c | 23 |
1 files changed, 16 insertions, 7 deletions
diff --git a/libavcodec/g2meet.c b/libavcodec/g2meet.c index d01abcca24..045c2a5b9a 100644 --- a/libavcodec/g2meet.c +++ b/libavcodec/g2meet.c @@ -253,19 +253,25 @@ static int jpg_decode_data(JPGContext *c, int width, int height, mb_h = (height + 15) >> 4; if (!num_mbs) - num_mbs = mb_w * mb_h; + num_mbs = mb_w * mb_h * 4; for (i = 0; i < 3; i++) c->prev_dc[i] = 1024; bx = by = 0; + c->dsp.clear_blocks(c->block[0]); for (mb_y = 0; mb_y < mb_h; mb_y++) { for (mb_x = 0; mb_x < mb_w; mb_x++) { - if (mask && !mask[mb_x]) { + if (mask && !mask[mb_x * 2] && !mask[mb_x * 2 + 1] && + !mask[mb_x * 2 + mask_stride] && + !mask[mb_x * 2 + 1 + mask_stride]) { bx += 16; continue; } for (j = 0; j < 2; j++) { for (i = 0; i < 2; i++) { + if (mask && !mask[mb_x * 2 + i + j * mask_stride]) + continue; + num_mbs--; if ((ret = jpg_decode_block(c, &gb, 0, c->block[i + j * 2])) != 0) return ret; @@ -290,14 +296,14 @@ static int jpg_decode_data(JPGContext *c, int width, int height, } } - if (!--num_mbs) + if (!num_mbs) return 0; bx += 16; } bx = 0; by += 16; if (mask) - mask += mask_stride; + mask += mask_stride * 2; } return 0; @@ -403,7 +409,7 @@ static int kempf_decode_tile(G2MContext *c, int tile_x, int tile_y, nblocks = *src++ + 1; cblocks = 0; - bstride = FFALIGN(width, 16) >> 4; + bstride = FFALIGN(width, 16) >> 3; // blocks are coded LSB and we need normal bitreader for JPEG data bits = 0; for (i = 0; i < (FFALIGN(height, 16) >> 4); i++) { @@ -418,14 +424,17 @@ static int kempf_decode_tile(G2MContext *c, int tile_x, int tile_y, cblocks += coded; if (cblocks > nblocks) return AVERROR_INVALIDDATA; - c->kempf_flags[j + i * bstride] = coded; + c->kempf_flags[j * 2 + i * 2 * bstride] = + c->kempf_flags[j * 2 + 1 + i * 2 * bstride] = + c->kempf_flags[j * 2 + (i * 2 + 1) * bstride] = + c->kempf_flags[j * 2 + 1 + (i * 2 + 1) * bstride] = coded; } } memset(c->jpeg_tile, 0, c->tile_stride * height); jpg_decode_data(&c->jc, width, height, src, src_end - src, c->jpeg_tile, c->tile_stride, - c->kempf_flags, bstride, nblocks, 0); + c->kempf_flags, bstride, nblocks * 4, 0); kempf_restore_buf(c->kempf_buf, dlen, dst, c->framebuf_stride, c->jpeg_tile, c->tile_stride, |