From e3fcb14347466095839c2a3c47ebecff02da891e Mon Sep 17 00:00:00 2001 From: Diego Biurrun Date: Fri, 24 Jan 2014 11:55:16 +0100 Subject: dsputil: Split off IDCT bits into their own context --- libavcodec/idctdsp.c | 197 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 197 insertions(+) create mode 100644 libavcodec/idctdsp.c (limited to 'libavcodec/idctdsp.c') diff --git a/libavcodec/idctdsp.c b/libavcodec/idctdsp.c new file mode 100644 index 0000000000..8542ab35aa --- /dev/null +++ b/libavcodec/idctdsp.c @@ -0,0 +1,197 @@ +/* + * This file is part of Libav. + * + * Libav is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * Libav is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with Libav; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include "config.h" +#include "libavutil/attributes.h" +#include "libavutil/common.h" +#include "avcodec.h" +#include "dct.h" +#include "faanidct.h" +#include "idctdsp.h" +#include "simple_idct.h" + +av_cold void ff_init_scantable(uint8_t *permutation, ScanTable *st, + const uint8_t *src_scantable) +{ + int i, end; + + st->scantable = src_scantable; + + for (i = 0; i < 64; i++) { + int j = src_scantable[i]; + st->permutated[i] = permutation[j]; + } + + end = -1; + for (i = 0; i < 64; i++) { + int j = st->permutated[i]; + if (j > end) + end = j; + st->raster_end[i] = end; + } +} + +av_cold void ff_init_scantable_permutation(uint8_t *idct_permutation, + int idct_permutation_type) +{ + int i; + + if (ARCH_X86) + if (ff_init_scantable_permutation_x86(idct_permutation, + idct_permutation_type)) + return; + + switch (idct_permutation_type) { + case FF_NO_IDCT_PERM: + for (i = 0; i < 64; i++) + idct_permutation[i] = i; + break; + case FF_LIBMPEG2_IDCT_PERM: + for (i = 0; i < 64; i++) + idct_permutation[i] = (i & 0x38) | ((i & 6) >> 1) | ((i & 1) << 2); + break; + case FF_TRANSPOSE_IDCT_PERM: + for (i = 0; i < 64; i++) + idct_permutation[i] = ((i & 7) << 3) | (i >> 3); + break; + case FF_PARTTRANS_IDCT_PERM: + for (i = 0; i < 64; i++) + idct_permutation[i] = (i & 0x24) | ((i & 3) << 3) | ((i >> 3) & 3); + break; + default: + av_log(NULL, AV_LOG_ERROR, + "Internal error, IDCT permutation not set\n"); + } +} + +static void put_pixels_clamped_c(const int16_t *block, uint8_t *restrict pixels, + int line_size) +{ + int i; + + /* read the pixels */ + for (i = 0; i < 8; i++) { + pixels[0] = av_clip_uint8(block[0]); + pixels[1] = av_clip_uint8(block[1]); + pixels[2] = av_clip_uint8(block[2]); + pixels[3] = av_clip_uint8(block[3]); + pixels[4] = av_clip_uint8(block[4]); + pixels[5] = av_clip_uint8(block[5]); + pixels[6] = av_clip_uint8(block[6]); + pixels[7] = av_clip_uint8(block[7]); + + pixels += line_size; + block += 8; + } +} + +static void put_signed_pixels_clamped_c(const int16_t *block, + uint8_t *restrict pixels, + int line_size) +{ + int i, j; + + for (i = 0; i < 8; i++) { + for (j = 0; j < 8; j++) { + if (*block < -128) + *pixels = 0; + else if (*block > 127) + *pixels = 255; + else + *pixels = (uint8_t) (*block + 128); + block++; + pixels++; + } + pixels += (line_size - 8); + } +} + +static void add_pixels_clamped_c(const int16_t *block, uint8_t *restrict pixels, + int line_size) +{ + int i; + + /* read the pixels */ + for (i = 0; i < 8; i++) { + pixels[0] = av_clip_uint8(pixels[0] + block[0]); + pixels[1] = av_clip_uint8(pixels[1] + block[1]); + pixels[2] = av_clip_uint8(pixels[2] + block[2]); + pixels[3] = av_clip_uint8(pixels[3] + block[3]); + pixels[4] = av_clip_uint8(pixels[4] + block[4]); + pixels[5] = av_clip_uint8(pixels[5] + block[5]); + pixels[6] = av_clip_uint8(pixels[6] + block[6]); + pixels[7] = av_clip_uint8(pixels[7] + block[7]); + pixels += line_size; + block += 8; + } +} + +static void jref_idct_put(uint8_t *dest, int line_size, int16_t *block) +{ + ff_j_rev_dct(block); + put_pixels_clamped_c(block, dest, line_size); +} + +static void jref_idct_add(uint8_t *dest, int line_size, int16_t *block) +{ + ff_j_rev_dct(block); + add_pixels_clamped_c(block, dest, line_size); +} + +av_cold void ff_idctdsp_init(IDCTDSPContext *c, AVCodecContext *avctx) +{ + const unsigned high_bit_depth = avctx->bits_per_raw_sample > 8; + + if (avctx->bits_per_raw_sample == 10) { + c->idct_put = ff_simple_idct_put_10; + c->idct_add = ff_simple_idct_add_10; + c->idct = ff_simple_idct_10; + c->idct_permutation_type = FF_NO_IDCT_PERM; + } else { + if (avctx->idct_algo == FF_IDCT_INT) { + c->idct_put = jref_idct_put; + c->idct_add = jref_idct_add; + c->idct = ff_j_rev_dct; + c->idct_permutation_type = FF_LIBMPEG2_IDCT_PERM; + } else if (avctx->idct_algo == FF_IDCT_FAAN) { + c->idct_put = ff_faanidct_put; + c->idct_add = ff_faanidct_add; + c->idct = ff_faanidct; + c->idct_permutation_type = FF_NO_IDCT_PERM; + } else { // accurate/default + c->idct_put = ff_simple_idct_put_8; + c->idct_add = ff_simple_idct_add_8; + c->idct = ff_simple_idct_8; + c->idct_permutation_type = FF_NO_IDCT_PERM; + } + } + + c->put_pixels_clamped = put_pixels_clamped_c; + c->put_signed_pixels_clamped = put_signed_pixels_clamped_c; + c->add_pixels_clamped = add_pixels_clamped_c; + + if (ARCH_ARM) + ff_idctdsp_init_arm(c, avctx, high_bit_depth); + if (ARCH_PPC) + ff_idctdsp_init_ppc(c, avctx, high_bit_depth); + if (ARCH_X86) + ff_idctdsp_init_x86(c, avctx, high_bit_depth); + + ff_init_scantable_permutation(c->idct_permutation, + c->idct_permutation_type); +} -- cgit v1.2.3