625 lines
24 KiB
C
625 lines
24 KiB
C
/*
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* IFF PBM/ILBM bitmap decoder
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* Copyright (c) 2010 Peter Ross <pross@xvid.org>
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* Copyright (c) 2010 Sebastian Vater <cdgs.basty@googlemail.com>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* IFF PBM/ILBM bitmap decoder
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*/
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#include "libavutil/imgutils.h"
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#include "bytestream.h"
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#include "avcodec.h"
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#include "get_bits.h"
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// TODO: masking bits
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typedef enum {
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MASK_NONE,
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MASK_HAS_MASK,
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MASK_HAS_TRANSPARENT_COLOR,
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MASK_LASSO
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} mask_type;
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typedef struct {
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AVFrame frame;
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int planesize;
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uint8_t * planebuf;
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uint8_t * ham_buf; ///< temporary buffer for planar to chunky conversation
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uint32_t *ham_palbuf; ///< HAM decode table
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unsigned compression; ///< delta compression method used
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unsigned bpp; ///< bits per plane to decode (differs from bits_per_coded_sample if HAM)
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unsigned ham; ///< 0 if non-HAM or number of hold bits (6 for bpp > 6, 4 otherwise)
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unsigned flags; ///< 1 for EHB, 0 is no extra half darkening
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unsigned transparency; ///< TODO: transparency color index in palette
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unsigned masking; ///< TODO: masking method used
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int init; // 1 if buffer and palette data already initialized, 0 otherwise
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} IffContext;
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#define LUT8_PART(plane, v) \
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AV_LE2NE64C(UINT64_C(0x0000000)<<32 | v) << plane, \
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AV_LE2NE64C(UINT64_C(0x1000000)<<32 | v) << plane, \
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AV_LE2NE64C(UINT64_C(0x0010000)<<32 | v) << plane, \
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AV_LE2NE64C(UINT64_C(0x1010000)<<32 | v) << plane, \
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AV_LE2NE64C(UINT64_C(0x0000100)<<32 | v) << plane, \
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AV_LE2NE64C(UINT64_C(0x1000100)<<32 | v) << plane, \
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AV_LE2NE64C(UINT64_C(0x0010100)<<32 | v) << plane, \
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AV_LE2NE64C(UINT64_C(0x1010100)<<32 | v) << plane, \
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AV_LE2NE64C(UINT64_C(0x0000001)<<32 | v) << plane, \
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AV_LE2NE64C(UINT64_C(0x1000001)<<32 | v) << plane, \
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AV_LE2NE64C(UINT64_C(0x0010001)<<32 | v) << plane, \
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AV_LE2NE64C(UINT64_C(0x1010001)<<32 | v) << plane, \
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AV_LE2NE64C(UINT64_C(0x0000101)<<32 | v) << plane, \
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AV_LE2NE64C(UINT64_C(0x1000101)<<32 | v) << plane, \
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AV_LE2NE64C(UINT64_C(0x0010101)<<32 | v) << plane, \
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AV_LE2NE64C(UINT64_C(0x1010101)<<32 | v) << plane
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#define LUT8(plane) { \
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LUT8_PART(plane, 0x0000000), \
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LUT8_PART(plane, 0x1000000), \
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LUT8_PART(plane, 0x0010000), \
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LUT8_PART(plane, 0x1010000), \
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LUT8_PART(plane, 0x0000100), \
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LUT8_PART(plane, 0x1000100), \
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LUT8_PART(plane, 0x0010100), \
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LUT8_PART(plane, 0x1010100), \
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LUT8_PART(plane, 0x0000001), \
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LUT8_PART(plane, 0x1000001), \
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LUT8_PART(plane, 0x0010001), \
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LUT8_PART(plane, 0x1010001), \
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LUT8_PART(plane, 0x0000101), \
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LUT8_PART(plane, 0x1000101), \
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LUT8_PART(plane, 0x0010101), \
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LUT8_PART(plane, 0x1010101), \
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}
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// 8 planes * 8-bit mask
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static const uint64_t plane8_lut[8][256] = {
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LUT8(0), LUT8(1), LUT8(2), LUT8(3),
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LUT8(4), LUT8(5), LUT8(6), LUT8(7),
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};
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#define LUT32(plane) { \
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0, 0, 0, 0, \
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0, 0, 0, 1 << plane, \
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0, 0, 1 << plane, 0, \
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0, 0, 1 << plane, 1 << plane, \
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0, 1 << plane, 0, 0, \
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0, 1 << plane, 0, 1 << plane, \
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0, 1 << plane, 1 << plane, 0, \
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0, 1 << plane, 1 << plane, 1 << plane, \
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1 << plane, 0, 0, 0, \
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1 << plane, 0, 0, 1 << plane, \
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1 << plane, 0, 1 << plane, 0, \
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1 << plane, 0, 1 << plane, 1 << plane, \
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1 << plane, 1 << plane, 0, 0, \
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1 << plane, 1 << plane, 0, 1 << plane, \
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1 << plane, 1 << plane, 1 << plane, 0, \
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1 << plane, 1 << plane, 1 << plane, 1 << plane, \
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}
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// 32 planes * 4-bit mask * 4 lookup tables each
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static const uint32_t plane32_lut[32][16*4] = {
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LUT32( 0), LUT32( 1), LUT32( 2), LUT32( 3),
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LUT32( 4), LUT32( 5), LUT32( 6), LUT32( 7),
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LUT32( 8), LUT32( 9), LUT32(10), LUT32(11),
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LUT32(12), LUT32(13), LUT32(14), LUT32(15),
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LUT32(16), LUT32(17), LUT32(18), LUT32(19),
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LUT32(20), LUT32(21), LUT32(22), LUT32(23),
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LUT32(24), LUT32(25), LUT32(26), LUT32(27),
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LUT32(28), LUT32(29), LUT32(30), LUT32(31),
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};
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// Gray to RGB, required for palette table of grayscale images with bpp < 8
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static av_always_inline uint32_t gray2rgb(const uint32_t x) {
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return x << 16 | x << 8 | x;
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}
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/**
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* Convert CMAP buffer (stored in extradata) to lavc palette format
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*/
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static int ff_cmap_read_palette(AVCodecContext *avctx, uint32_t *pal)
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{
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int count, i;
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const uint8_t *const palette = avctx->extradata + AV_RB16(avctx->extradata);
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int palette_size = avctx->extradata_size - AV_RB16(avctx->extradata);
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if (avctx->bits_per_coded_sample > 8) {
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av_log(avctx, AV_LOG_ERROR, "bit_per_coded_sample > 8 not supported\n");
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return AVERROR_INVALIDDATA;
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}
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count = 1 << avctx->bits_per_coded_sample;
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// If extradata is smaller than actually needed, fill the remaining with black.
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count = FFMIN(palette_size / 3, count);
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if (count) {
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for (i=0; i < count; i++) {
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pal[i] = 0xFF000000 | AV_RB24(palette + i*3);
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}
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} else { // Create gray-scale color palette for bps < 8
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count = 1 << avctx->bits_per_coded_sample;
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for (i=0; i < count; i++) {
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pal[i] = 0xFF000000 | gray2rgb((i * 255) >> avctx->bits_per_coded_sample);
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}
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}
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return 0;
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}
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/**
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* Extracts the IFF extra context and updates internal
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* decoder structures.
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*
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* @param avctx the AVCodecContext where to extract extra context to
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* @param avpkt the AVPacket to extract extra context from or NULL to use avctx
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* @return 0 in case of success, a negative error code otherwise
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*/
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static int extract_header(AVCodecContext *const avctx,
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const AVPacket *const avpkt) {
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const uint8_t *buf;
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unsigned buf_size;
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IffContext *s = avctx->priv_data;
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int palette_size = avctx->extradata_size - AV_RB16(avctx->extradata);
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if (avpkt) {
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int image_size;
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if (avpkt->size < 2)
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return AVERROR_INVALIDDATA;
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image_size = avpkt->size - AV_RB16(avpkt->data);
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buf = avpkt->data;
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buf_size = bytestream_get_be16(&buf);
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if (buf_size <= 1 || image_size <= 1) {
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av_log(avctx, AV_LOG_ERROR,
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"Invalid image size received: %u -> image data offset: %d\n",
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buf_size, image_size);
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return AVERROR_INVALIDDATA;
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}
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} else {
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if (avctx->extradata_size < 2)
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return AVERROR_INVALIDDATA;
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buf = avctx->extradata;
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buf_size = bytestream_get_be16(&buf);
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if (buf_size <= 1 || palette_size < 0) {
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av_log(avctx, AV_LOG_ERROR,
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"Invalid palette size received: %u -> palette data offset: %d\n",
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buf_size, palette_size);
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return AVERROR_INVALIDDATA;
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}
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}
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if (buf_size > 8) {
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s->compression = bytestream_get_byte(&buf);
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s->bpp = bytestream_get_byte(&buf);
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s->ham = bytestream_get_byte(&buf);
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s->flags = bytestream_get_byte(&buf);
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s->transparency = bytestream_get_be16(&buf);
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s->masking = bytestream_get_byte(&buf);
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if (s->masking == MASK_HAS_TRANSPARENT_COLOR) {
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av_log(avctx, AV_LOG_ERROR, "Transparency not supported\n");
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return AVERROR_PATCHWELCOME;
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} else if (s->masking != MASK_NONE) {
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av_log(avctx, AV_LOG_ERROR, "Masking not supported\n");
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return AVERROR_PATCHWELCOME;
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}
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if (!s->bpp || s->bpp > 32) {
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av_log(avctx, AV_LOG_ERROR, "Invalid number of bitplanes: %u\n", s->bpp);
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return AVERROR_INVALIDDATA;
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} else if (s->ham >= 8) {
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av_log(avctx, AV_LOG_ERROR, "Invalid number of hold bits for HAM: %u\n", s->ham);
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return AVERROR_INVALIDDATA;
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}
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av_freep(&s->ham_buf);
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av_freep(&s->ham_palbuf);
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if (s->ham) {
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int i, count = FFMIN(palette_size / 3, 1 << s->ham);
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const uint8_t *const palette = avctx->extradata + AV_RB16(avctx->extradata);
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s->ham_buf = av_malloc((s->planesize * 8) + FF_INPUT_BUFFER_PADDING_SIZE);
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if (!s->ham_buf)
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return AVERROR(ENOMEM);
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s->ham_palbuf = av_malloc((8 * (1 << s->ham) * sizeof (uint32_t)) + FF_INPUT_BUFFER_PADDING_SIZE);
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if (!s->ham_palbuf) {
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av_freep(&s->ham_buf);
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return AVERROR(ENOMEM);
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}
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if (count) { // HAM with color palette attached
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// prefill with black and palette and set HAM take direct value mask to zero
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memset(s->ham_palbuf, 0, (1 << s->ham) * 2 * sizeof (uint32_t));
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for (i=0; i < count; i++) {
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s->ham_palbuf[i*2+1] = AV_RL24(palette + i*3);
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}
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count = 1 << s->ham;
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} else { // HAM with grayscale color palette
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count = 1 << s->ham;
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for (i=0; i < count; i++) {
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s->ham_palbuf[i*2] = 0; // take direct color value from palette
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s->ham_palbuf[i*2+1] = av_le2ne32(gray2rgb((i * 255) >> s->ham));
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}
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}
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for (i=0; i < count; i++) {
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uint32_t tmp = i << (8 - s->ham);
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tmp |= tmp >> s->ham;
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s->ham_palbuf[(i+count)*2] = 0x00FFFF; // just modify blue color component
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s->ham_palbuf[(i+count*2)*2] = 0xFFFF00; // just modify red color component
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s->ham_palbuf[(i+count*3)*2] = 0xFF00FF; // just modify green color component
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s->ham_palbuf[(i+count)*2+1] = tmp << 16;
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s->ham_palbuf[(i+count*2)*2+1] = tmp;
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s->ham_palbuf[(i+count*3)*2+1] = tmp << 8;
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}
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} else if (s->flags & 1) { // EHB (ExtraHalfBrite) color palette
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av_log(avctx, AV_LOG_ERROR, "ExtraHalfBrite (EHB) mode not supported\n");
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return AVERROR_PATCHWELCOME;
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}
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}
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return 0;
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}
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static av_cold int decode_init(AVCodecContext *avctx)
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{
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IffContext *s = avctx->priv_data;
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int err;
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if (avctx->bits_per_coded_sample <= 8) {
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int palette_size = avctx->extradata_size - AV_RB16(avctx->extradata);
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avctx->pix_fmt = (avctx->bits_per_coded_sample < 8) ||
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(avctx->extradata_size >= 2 && palette_size) ? PIX_FMT_PAL8 : PIX_FMT_GRAY8;
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} else if (avctx->bits_per_coded_sample <= 32) {
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avctx->pix_fmt = PIX_FMT_BGR32;
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} else {
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return AVERROR_INVALIDDATA;
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}
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if ((err = av_image_check_size(avctx->width, avctx->height, 0, avctx)))
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return err;
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s->planesize = FFALIGN(avctx->width, 16) >> 3; // Align plane size in bits to word-boundary
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s->planebuf = av_malloc(s->planesize + FF_INPUT_BUFFER_PADDING_SIZE);
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if (!s->planebuf)
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return AVERROR(ENOMEM);
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s->bpp = avctx->bits_per_coded_sample;
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avcodec_get_frame_defaults(&s->frame);
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if ((err = extract_header(avctx, NULL)) < 0)
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return err;
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s->frame.reference = 3;
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return 0;
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}
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/**
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* Decode interleaved plane buffer up to 8bpp
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* @param dst Destination buffer
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* @param buf Source buffer
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* @param buf_size
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* @param plane plane number to decode as
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*/
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static void decodeplane8(uint8_t *dst, const uint8_t *buf, int buf_size, int plane)
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{
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const uint64_t *lut = plane8_lut[plane];
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do {
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uint64_t v = AV_RN64A(dst) | lut[*buf++];
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AV_WN64A(dst, v);
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dst += 8;
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} while (--buf_size);
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}
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/**
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* Decode interleaved plane buffer up to 24bpp
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* @param dst Destination buffer
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* @param buf Source buffer
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* @param buf_size
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* @param plane plane number to decode as
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*/
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static void decodeplane32(uint32_t *dst, const uint8_t *buf, int buf_size, int plane)
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{
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const uint32_t *lut = plane32_lut[plane];
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do {
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unsigned mask = (*buf >> 2) & ~3;
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dst[0] |= lut[mask++];
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dst[1] |= lut[mask++];
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dst[2] |= lut[mask++];
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dst[3] |= lut[mask];
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mask = (*buf++ << 2) & 0x3F;
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dst[4] |= lut[mask++];
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dst[5] |= lut[mask++];
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dst[6] |= lut[mask++];
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dst[7] |= lut[mask];
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dst += 8;
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} while (--buf_size);
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}
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#define DECODE_HAM_PLANE32(x) \
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first = buf[x] << 1; \
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second = buf[(x)+1] << 1; \
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delta &= pal[first++]; \
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delta |= pal[first]; \
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dst[x] = delta; \
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delta &= pal[second++]; \
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delta |= pal[second]; \
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dst[(x)+1] = delta
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/**
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* Converts one line of HAM6/8-encoded chunky buffer to 24bpp.
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*
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* @param dst the destination 24bpp buffer
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* @param buf the source 8bpp chunky buffer
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* @param pal the HAM decode table
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* @param buf_size the plane size in bytes
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*/
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static void decode_ham_plane32(uint32_t *dst, const uint8_t *buf,
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const uint32_t *const pal, unsigned buf_size)
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{
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uint32_t delta = 0;
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do {
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uint32_t first, second;
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DECODE_HAM_PLANE32(0);
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DECODE_HAM_PLANE32(2);
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DECODE_HAM_PLANE32(4);
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DECODE_HAM_PLANE32(6);
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buf += 8;
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dst += 8;
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} while (--buf_size);
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}
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/**
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* Decode one complete byterun1 encoded line.
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*
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* @param dst the destination buffer where to store decompressed bitstream
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* @param dst_size the destination plane size in bytes
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* @param buf the source byterun1 compressed bitstream
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* @param buf_end the EOF of source byterun1 compressed bitstream
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* @return number of consumed bytes in byterun1 compressed bitstream
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*/
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static int decode_byterun(uint8_t *dst, int dst_size,
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const uint8_t *buf, const uint8_t *const buf_end) {
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const uint8_t *const buf_start = buf;
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unsigned x;
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for (x = 0; x < dst_size && buf < buf_end;) {
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unsigned length;
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const int8_t value = *buf++;
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if (value >= 0) {
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length = value + 1;
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memcpy(dst + x, buf, FFMIN3(length, dst_size - x, buf_end - buf));
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buf += length;
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} else if (value > -128) {
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length = -value + 1;
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memset(dst + x, *buf++, FFMIN(length, dst_size - x));
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} else { // noop
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continue;
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}
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x += length;
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}
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return buf - buf_start;
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}
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static int decode_frame_ilbm(AVCodecContext *avctx,
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void *data, int *data_size,
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AVPacket *avpkt)
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{
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IffContext *s = avctx->priv_data;
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const uint8_t *buf = avpkt->size >= 2 ? avpkt->data + AV_RB16(avpkt->data) : NULL;
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const int buf_size = avpkt->size >= 2 ? avpkt->size - AV_RB16(avpkt->data) : 0;
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const uint8_t *buf_end = buf+buf_size;
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int y, plane, res;
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if ((res = extract_header(avctx, avpkt)) < 0)
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return res;
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if (s->init) {
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if ((res = avctx->reget_buffer(avctx, &s->frame)) < 0) {
|
|
av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
|
|
return res;
|
|
}
|
|
} else if ((res = avctx->get_buffer(avctx, &s->frame)) < 0) {
|
|
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
|
|
return res;
|
|
} else if (avctx->bits_per_coded_sample <= 8 && avctx->pix_fmt != PIX_FMT_GRAY8) {
|
|
if ((res = ff_cmap_read_palette(avctx, (uint32_t*)s->frame.data[1])) < 0)
|
|
return res;
|
|
}
|
|
s->init = 1;
|
|
|
|
if (avctx->codec_tag == MKTAG('A','C','B','M')) {
|
|
if (avctx->pix_fmt == PIX_FMT_PAL8 || avctx->pix_fmt == PIX_FMT_GRAY8) {
|
|
memset(s->frame.data[0], 0, avctx->height * s->frame.linesize[0]);
|
|
for (plane = 0; plane < s->bpp; plane++) {
|
|
for(y = 0; y < avctx->height && buf < buf_end; y++ ) {
|
|
uint8_t *row = &s->frame.data[0][ y*s->frame.linesize[0] ];
|
|
decodeplane8(row, buf, FFMIN(s->planesize, buf_end - buf), plane);
|
|
buf += s->planesize;
|
|
}
|
|
}
|
|
} else if (s->ham) { // HAM to PIX_FMT_BGR32
|
|
memset(s->frame.data[0], 0, avctx->height * s->frame.linesize[0]);
|
|
for(y = 0; y < avctx->height; y++) {
|
|
uint8_t *row = &s->frame.data[0][y * s->frame.linesize[0]];
|
|
memset(s->ham_buf, 0, s->planesize * 8);
|
|
for (plane = 0; plane < s->bpp; plane++) {
|
|
const uint8_t * start = buf + (plane * avctx->height + y) * s->planesize;
|
|
if (start >= buf_end)
|
|
break;
|
|
decodeplane8(s->ham_buf, start, FFMIN(s->planesize, buf_end - start), plane);
|
|
}
|
|
decode_ham_plane32((uint32_t *) row, s->ham_buf, s->ham_palbuf, s->planesize);
|
|
}
|
|
}
|
|
} else if (avctx->codec_tag == MKTAG('I','L','B','M')) { // interleaved
|
|
if (avctx->pix_fmt == PIX_FMT_PAL8 || avctx->pix_fmt == PIX_FMT_GRAY8) {
|
|
for(y = 0; y < avctx->height; y++ ) {
|
|
uint8_t *row = &s->frame.data[0][ y*s->frame.linesize[0] ];
|
|
memset(row, 0, avctx->width);
|
|
for (plane = 0; plane < s->bpp && buf < buf_end; plane++) {
|
|
decodeplane8(row, buf, FFMIN(s->planesize, buf_end - buf), plane);
|
|
buf += s->planesize;
|
|
}
|
|
}
|
|
} else if (s->ham) { // HAM to PIX_FMT_BGR32
|
|
for (y = 0; y < avctx->height; y++) {
|
|
uint8_t *row = &s->frame.data[0][ y*s->frame.linesize[0] ];
|
|
memset(s->ham_buf, 0, s->planesize * 8);
|
|
for (plane = 0; plane < s->bpp && buf < buf_end; plane++) {
|
|
decodeplane8(s->ham_buf, buf, FFMIN(s->planesize, buf_end - buf), plane);
|
|
buf += s->planesize;
|
|
}
|
|
decode_ham_plane32((uint32_t *) row, s->ham_buf, s->ham_palbuf, s->planesize);
|
|
}
|
|
} else { // PIX_FMT_BGR32
|
|
for(y = 0; y < avctx->height; y++ ) {
|
|
uint8_t *row = &s->frame.data[0][y*s->frame.linesize[0]];
|
|
memset(row, 0, avctx->width << 2);
|
|
for (plane = 0; plane < s->bpp && buf < buf_end; plane++) {
|
|
decodeplane32((uint32_t *) row, buf, FFMIN(s->planesize, buf_end - buf), plane);
|
|
buf += s->planesize;
|
|
}
|
|
}
|
|
}
|
|
} else if (avctx->pix_fmt == PIX_FMT_PAL8 || avctx->pix_fmt == PIX_FMT_GRAY8) { // IFF-PBM
|
|
for(y = 0; y < avctx->height; y++ ) {
|
|
uint8_t *row = &s->frame.data[0][y * s->frame.linesize[0]];
|
|
memcpy(row, buf, FFMIN(avctx->width, buf_end - buf));
|
|
buf += avctx->width + (avctx->width % 2); // padding if odd
|
|
}
|
|
} else { // IFF-PBM: HAM to PIX_FMT_BGR32
|
|
for (y = 0; y < avctx->height; y++) {
|
|
uint8_t *row = &s->frame.data[0][ y*s->frame.linesize[0] ];
|
|
memcpy(s->ham_buf, buf, FFMIN(avctx->width, buf_end - buf));
|
|
buf += avctx->width + (avctx->width & 1); // padding if odd
|
|
decode_ham_plane32((uint32_t *) row, s->ham_buf, s->ham_palbuf, avctx->width);
|
|
}
|
|
}
|
|
|
|
*data_size = sizeof(AVFrame);
|
|
*(AVFrame*)data = s->frame;
|
|
return buf_size;
|
|
}
|
|
|
|
static int decode_frame_byterun1(AVCodecContext *avctx,
|
|
void *data, int *data_size,
|
|
AVPacket *avpkt)
|
|
{
|
|
IffContext *s = avctx->priv_data;
|
|
const uint8_t *buf = avpkt->size >= 2 ? avpkt->data + AV_RB16(avpkt->data) : NULL;
|
|
const int buf_size = avpkt->size >= 2 ? avpkt->size - AV_RB16(avpkt->data) : 0;
|
|
const uint8_t *buf_end = buf+buf_size;
|
|
int y, plane, res;
|
|
|
|
if ((res = extract_header(avctx, avpkt)) < 0)
|
|
return res;
|
|
if (s->init) {
|
|
if ((res = avctx->reget_buffer(avctx, &s->frame)) < 0) {
|
|
av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
|
|
return res;
|
|
}
|
|
} else if ((res = avctx->get_buffer(avctx, &s->frame)) < 0) {
|
|
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
|
|
return res;
|
|
} else if (avctx->bits_per_coded_sample <= 8 && avctx->pix_fmt != PIX_FMT_GRAY8) {
|
|
if ((res = ff_cmap_read_palette(avctx, (uint32_t*)s->frame.data[1])) < 0)
|
|
return res;
|
|
}
|
|
s->init = 1;
|
|
|
|
if (avctx->codec_tag == MKTAG('I','L','B','M')) { //interleaved
|
|
if (avctx->pix_fmt == PIX_FMT_PAL8 || avctx->pix_fmt == PIX_FMT_GRAY8) {
|
|
for(y = 0; y < avctx->height ; y++ ) {
|
|
uint8_t *row = &s->frame.data[0][ y*s->frame.linesize[0] ];
|
|
memset(row, 0, avctx->width);
|
|
for (plane = 0; plane < s->bpp; plane++) {
|
|
buf += decode_byterun(s->planebuf, s->planesize, buf, buf_end);
|
|
decodeplane8(row, s->planebuf, s->planesize, plane);
|
|
}
|
|
}
|
|
} else if (s->ham) { // HAM to PIX_FMT_BGR32
|
|
for (y = 0; y < avctx->height ; y++) {
|
|
uint8_t *row = &s->frame.data[0][y*s->frame.linesize[0]];
|
|
memset(s->ham_buf, 0, s->planesize * 8);
|
|
for (plane = 0; plane < s->bpp; plane++) {
|
|
buf += decode_byterun(s->planebuf, s->planesize, buf, buf_end);
|
|
decodeplane8(s->ham_buf, s->planebuf, s->planesize, plane);
|
|
}
|
|
decode_ham_plane32((uint32_t *) row, s->ham_buf, s->ham_palbuf, s->planesize);
|
|
}
|
|
} else { //PIX_FMT_BGR32
|
|
for(y = 0; y < avctx->height ; y++ ) {
|
|
uint8_t *row = &s->frame.data[0][y*s->frame.linesize[0]];
|
|
memset(row, 0, avctx->width << 2);
|
|
for (plane = 0; plane < s->bpp; plane++) {
|
|
buf += decode_byterun(s->planebuf, s->planesize, buf, buf_end);
|
|
decodeplane32((uint32_t *) row, s->planebuf, s->planesize, plane);
|
|
}
|
|
}
|
|
}
|
|
} else if (avctx->pix_fmt == PIX_FMT_PAL8 || avctx->pix_fmt == PIX_FMT_GRAY8) { // IFF-PBM
|
|
for(y = 0; y < avctx->height ; y++ ) {
|
|
uint8_t *row = &s->frame.data[0][y*s->frame.linesize[0]];
|
|
buf += decode_byterun(row, avctx->width, buf, buf_end);
|
|
}
|
|
} else { // IFF-PBM: HAM to PIX_FMT_BGR32
|
|
for (y = 0; y < avctx->height ; y++) {
|
|
uint8_t *row = &s->frame.data[0][y*s->frame.linesize[0]];
|
|
buf += decode_byterun(s->ham_buf, avctx->width, buf, buf_end);
|
|
decode_ham_plane32((uint32_t *) row, s->ham_buf, s->ham_palbuf, avctx->width);
|
|
}
|
|
}
|
|
|
|
*data_size = sizeof(AVFrame);
|
|
*(AVFrame*)data = s->frame;
|
|
return buf_size;
|
|
}
|
|
|
|
static av_cold int decode_end(AVCodecContext *avctx)
|
|
{
|
|
IffContext *s = avctx->priv_data;
|
|
if (s->frame.data[0])
|
|
avctx->release_buffer(avctx, &s->frame);
|
|
av_freep(&s->planebuf);
|
|
av_freep(&s->ham_buf);
|
|
av_freep(&s->ham_palbuf);
|
|
return 0;
|
|
}
|
|
|
|
AVCodec ff_iff_ilbm_decoder = {
|
|
.name = "iff_ilbm",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = CODEC_ID_IFF_ILBM,
|
|
.priv_data_size = sizeof(IffContext),
|
|
.init = decode_init,
|
|
.close = decode_end,
|
|
.decode = decode_frame_ilbm,
|
|
.capabilities = CODEC_CAP_DR1,
|
|
.long_name = NULL_IF_CONFIG_SMALL("IFF ILBM"),
|
|
};
|
|
|
|
AVCodec ff_iff_byterun1_decoder = {
|
|
.name = "iff_byterun1",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = CODEC_ID_IFF_BYTERUN1,
|
|
.priv_data_size = sizeof(IffContext),
|
|
.init = decode_init,
|
|
.close = decode_end,
|
|
.decode = decode_frame_byterun1,
|
|
.capabilities = CODEC_CAP_DR1,
|
|
.long_name = NULL_IF_CONFIG_SMALL("IFF ByteRun1"),
|
|
};
|