yading@10: /* yading@10: * IFF ACBM/DEEP/ILBM/PBM bitmap decoder yading@10: * Copyright (c) 2010 Peter Ross yading@10: * Copyright (c) 2010 Sebastian Vater yading@10: * yading@10: * This file is part of FFmpeg. yading@10: * yading@10: * FFmpeg is free software; you can redistribute it and/or yading@10: * modify it under the terms of the GNU Lesser General Public yading@10: * License as published by the Free Software Foundation; either yading@10: * version 2.1 of the License, or (at your option) any later version. yading@10: * yading@10: * FFmpeg is distributed in the hope that it will be useful, yading@10: * but WITHOUT ANY WARRANTY; without even the implied warranty of yading@10: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU yading@10: * Lesser General Public License for more details. yading@10: * yading@10: * You should have received a copy of the GNU Lesser General Public yading@10: * License along with FFmpeg; if not, write to the Free Software yading@10: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA yading@10: */ yading@10: yading@10: /** yading@10: * @file yading@10: * IFF ACBM/DEEP/ILBM/PBM bitmap decoder yading@10: */ yading@10: yading@10: #include "libavutil/imgutils.h" yading@10: #include "bytestream.h" yading@10: #include "avcodec.h" yading@10: #include "get_bits.h" yading@10: #include "internal.h" yading@10: yading@10: // TODO: masking bits yading@10: typedef enum { yading@10: MASK_NONE, yading@10: MASK_HAS_MASK, yading@10: MASK_HAS_TRANSPARENT_COLOR, yading@10: MASK_LASSO yading@10: } mask_type; yading@10: yading@10: typedef struct { yading@10: AVFrame *frame; yading@10: int planesize; yading@10: uint8_t * planebuf; yading@10: uint8_t * ham_buf; ///< temporary buffer for planar to chunky conversation yading@10: uint32_t *ham_palbuf; ///< HAM decode table yading@10: uint32_t *mask_buf; ///< temporary buffer for palette indices yading@10: uint32_t *mask_palbuf; ///< masking palette table yading@10: unsigned compression; ///< delta compression method used yading@10: unsigned bpp; ///< bits per plane to decode (differs from bits_per_coded_sample if HAM) yading@10: unsigned ham; ///< 0 if non-HAM or number of hold bits (6 for bpp > 6, 4 otherwise) yading@10: unsigned flags; ///< 1 for EHB, 0 is no extra half darkening yading@10: unsigned transparency; ///< TODO: transparency color index in palette yading@10: unsigned masking; ///< TODO: masking method used yading@10: int init; // 1 if buffer and palette data already initialized, 0 otherwise yading@10: int16_t tvdc[16]; ///< TVDC lookup table yading@10: } IffContext; yading@10: yading@10: #define LUT8_PART(plane, v) \ yading@10: AV_LE2NE64C(UINT64_C(0x0000000)<<32 | v) << plane, \ yading@10: AV_LE2NE64C(UINT64_C(0x1000000)<<32 | v) << plane, \ yading@10: AV_LE2NE64C(UINT64_C(0x0010000)<<32 | v) << plane, \ yading@10: AV_LE2NE64C(UINT64_C(0x1010000)<<32 | v) << plane, \ yading@10: AV_LE2NE64C(UINT64_C(0x0000100)<<32 | v) << plane, \ yading@10: AV_LE2NE64C(UINT64_C(0x1000100)<<32 | v) << plane, \ yading@10: AV_LE2NE64C(UINT64_C(0x0010100)<<32 | v) << plane, \ yading@10: AV_LE2NE64C(UINT64_C(0x1010100)<<32 | v) << plane, \ yading@10: AV_LE2NE64C(UINT64_C(0x0000001)<<32 | v) << plane, \ yading@10: AV_LE2NE64C(UINT64_C(0x1000001)<<32 | v) << plane, \ yading@10: AV_LE2NE64C(UINT64_C(0x0010001)<<32 | v) << plane, \ yading@10: AV_LE2NE64C(UINT64_C(0x1010001)<<32 | v) << plane, \ yading@10: AV_LE2NE64C(UINT64_C(0x0000101)<<32 | v) << plane, \ yading@10: AV_LE2NE64C(UINT64_C(0x1000101)<<32 | v) << plane, \ yading@10: AV_LE2NE64C(UINT64_C(0x0010101)<<32 | v) << plane, \ yading@10: AV_LE2NE64C(UINT64_C(0x1010101)<<32 | v) << plane yading@10: yading@10: #define LUT8(plane) { \ yading@10: LUT8_PART(plane, 0x0000000), \ yading@10: LUT8_PART(plane, 0x1000000), \ yading@10: LUT8_PART(plane, 0x0010000), \ yading@10: LUT8_PART(plane, 0x1010000), \ yading@10: LUT8_PART(plane, 0x0000100), \ yading@10: LUT8_PART(plane, 0x1000100), \ yading@10: LUT8_PART(plane, 0x0010100), \ yading@10: LUT8_PART(plane, 0x1010100), \ yading@10: LUT8_PART(plane, 0x0000001), \ yading@10: LUT8_PART(plane, 0x1000001), \ yading@10: LUT8_PART(plane, 0x0010001), \ yading@10: LUT8_PART(plane, 0x1010001), \ yading@10: LUT8_PART(plane, 0x0000101), \ yading@10: LUT8_PART(plane, 0x1000101), \ yading@10: LUT8_PART(plane, 0x0010101), \ yading@10: LUT8_PART(plane, 0x1010101), \ yading@10: } yading@10: yading@10: // 8 planes * 8-bit mask yading@10: static const uint64_t plane8_lut[8][256] = { yading@10: LUT8(0), LUT8(1), LUT8(2), LUT8(3), yading@10: LUT8(4), LUT8(5), LUT8(6), LUT8(7), yading@10: }; yading@10: yading@10: #define LUT32(plane) { \ yading@10: 0, 0, 0, 0, \ yading@10: 0, 0, 0, 1 << plane, \ yading@10: 0, 0, 1 << plane, 0, \ yading@10: 0, 0, 1 << plane, 1 << plane, \ yading@10: 0, 1 << plane, 0, 0, \ yading@10: 0, 1 << plane, 0, 1 << plane, \ yading@10: 0, 1 << plane, 1 << plane, 0, \ yading@10: 0, 1 << plane, 1 << plane, 1 << plane, \ yading@10: 1 << plane, 0, 0, 0, \ yading@10: 1 << plane, 0, 0, 1 << plane, \ yading@10: 1 << plane, 0, 1 << plane, 0, \ yading@10: 1 << plane, 0, 1 << plane, 1 << plane, \ yading@10: 1 << plane, 1 << plane, 0, 0, \ yading@10: 1 << plane, 1 << plane, 0, 1 << plane, \ yading@10: 1 << plane, 1 << plane, 1 << plane, 0, \ yading@10: 1 << plane, 1 << plane, 1 << plane, 1 << plane, \ yading@10: } yading@10: yading@10: // 32 planes * 4-bit mask * 4 lookup tables each yading@10: static const uint32_t plane32_lut[32][16*4] = { yading@10: LUT32( 0), LUT32( 1), LUT32( 2), LUT32( 3), yading@10: LUT32( 4), LUT32( 5), LUT32( 6), LUT32( 7), yading@10: LUT32( 8), LUT32( 9), LUT32(10), LUT32(11), yading@10: LUT32(12), LUT32(13), LUT32(14), LUT32(15), yading@10: LUT32(16), LUT32(17), LUT32(18), LUT32(19), yading@10: LUT32(20), LUT32(21), LUT32(22), LUT32(23), yading@10: LUT32(24), LUT32(25), LUT32(26), LUT32(27), yading@10: LUT32(28), LUT32(29), LUT32(30), LUT32(31), yading@10: }; yading@10: yading@10: // Gray to RGB, required for palette table of grayscale images with bpp < 8 yading@10: static av_always_inline uint32_t gray2rgb(const uint32_t x) { yading@10: return x << 16 | x << 8 | x; yading@10: } yading@10: yading@10: /** yading@10: * Convert CMAP buffer (stored in extradata) to lavc palette format yading@10: */ yading@10: static int cmap_read_palette(AVCodecContext *avctx, uint32_t *pal) yading@10: { yading@10: IffContext *s = avctx->priv_data; yading@10: int count, i; yading@10: const uint8_t *const palette = avctx->extradata + AV_RB16(avctx->extradata); yading@10: int palette_size = avctx->extradata_size - AV_RB16(avctx->extradata); yading@10: yading@10: if (avctx->bits_per_coded_sample > 8) { yading@10: av_log(avctx, AV_LOG_ERROR, "bits_per_coded_sample > 8 not supported\n"); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: yading@10: count = 1 << avctx->bits_per_coded_sample; yading@10: // If extradata is smaller than actually needed, fill the remaining with black. yading@10: count = FFMIN(palette_size / 3, count); yading@10: if (count) { yading@10: for (i=0; i < count; i++) { yading@10: pal[i] = 0xFF000000 | AV_RB24(palette + i*3); yading@10: } yading@10: if (s->flags && count >= 32) { // EHB yading@10: for (i = 0; i < 32; i++) yading@10: pal[i + 32] = 0xFF000000 | (AV_RB24(palette + i*3) & 0xFEFEFE) >> 1; yading@10: count = FFMAX(count, 64); yading@10: } yading@10: } else { // Create gray-scale color palette for bps < 8 yading@10: count = 1 << avctx->bits_per_coded_sample; yading@10: yading@10: for (i=0; i < count; i++) { yading@10: pal[i] = 0xFF000000 | gray2rgb((i * 255) >> avctx->bits_per_coded_sample); yading@10: } yading@10: } yading@10: if (s->masking == MASK_HAS_MASK) { yading@10: memcpy(pal + (1 << avctx->bits_per_coded_sample), pal, count * 4); yading@10: for (i = 0; i < count; i++) yading@10: pal[i] &= 0xFFFFFF; yading@10: } else if (s->masking == MASK_HAS_TRANSPARENT_COLOR && yading@10: s->transparency < 1 << avctx->bits_per_coded_sample) yading@10: pal[s->transparency] &= 0xFFFFFF; yading@10: return 0; yading@10: } yading@10: yading@10: /** yading@10: * Extracts the IFF extra context and updates internal yading@10: * decoder structures. yading@10: * yading@10: * @param avctx the AVCodecContext where to extract extra context to yading@10: * @param avpkt the AVPacket to extract extra context from or NULL to use avctx yading@10: * @return 0 in case of success, a negative error code otherwise yading@10: */ yading@10: static int extract_header(AVCodecContext *const avctx, yading@10: const AVPacket *const avpkt) { yading@10: const uint8_t *buf; yading@10: unsigned buf_size; yading@10: IffContext *s = avctx->priv_data; yading@10: int i, palette_size; yading@10: yading@10: if (avctx->extradata_size < 2) { yading@10: av_log(avctx, AV_LOG_ERROR, "not enough extradata\n"); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: palette_size = avctx->extradata_size - AV_RB16(avctx->extradata); yading@10: yading@10: if (avpkt) { yading@10: int image_size; yading@10: if (avpkt->size < 2) yading@10: return AVERROR_INVALIDDATA; yading@10: image_size = avpkt->size - AV_RB16(avpkt->data); yading@10: buf = avpkt->data; yading@10: buf_size = bytestream_get_be16(&buf); yading@10: if (buf_size <= 1 || image_size <= 1) { yading@10: av_log(avctx, AV_LOG_ERROR, yading@10: "Invalid image size received: %u -> image data offset: %d\n", yading@10: buf_size, image_size); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: } else { yading@10: buf = avctx->extradata; yading@10: buf_size = bytestream_get_be16(&buf); yading@10: if (buf_size <= 1 || palette_size < 0) { yading@10: av_log(avctx, AV_LOG_ERROR, yading@10: "Invalid palette size received: %u -> palette data offset: %d\n", yading@10: buf_size, palette_size); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: } yading@10: yading@10: if (buf_size >= 41) { yading@10: s->compression = bytestream_get_byte(&buf); yading@10: s->bpp = bytestream_get_byte(&buf); yading@10: s->ham = bytestream_get_byte(&buf); yading@10: s->flags = bytestream_get_byte(&buf); yading@10: s->transparency = bytestream_get_be16(&buf); yading@10: s->masking = bytestream_get_byte(&buf); yading@10: for (i = 0; i < 16; i++) yading@10: s->tvdc[i] = bytestream_get_be16(&buf); yading@10: yading@10: if (s->masking == MASK_HAS_MASK) { yading@10: if (s->bpp >= 8 && !s->ham) { yading@10: avctx->pix_fmt = AV_PIX_FMT_RGB32; yading@10: av_freep(&s->mask_buf); yading@10: av_freep(&s->mask_palbuf); yading@10: s->mask_buf = av_malloc((s->planesize * 32) + FF_INPUT_BUFFER_PADDING_SIZE); yading@10: if (!s->mask_buf) yading@10: return AVERROR(ENOMEM); yading@10: if (s->bpp > 16) { yading@10: av_log(avctx, AV_LOG_ERROR, "bpp %d too large for palette\n", s->bpp); yading@10: av_freep(&s->mask_buf); yading@10: return AVERROR(ENOMEM); yading@10: } yading@10: s->mask_palbuf = av_malloc((2 << s->bpp) * sizeof(uint32_t) + FF_INPUT_BUFFER_PADDING_SIZE); yading@10: if (!s->mask_palbuf) { yading@10: av_freep(&s->mask_buf); yading@10: return AVERROR(ENOMEM); yading@10: } yading@10: } yading@10: s->bpp++; yading@10: } else if (s->masking != MASK_NONE && s->masking != MASK_HAS_TRANSPARENT_COLOR) { yading@10: av_log(avctx, AV_LOG_ERROR, "Masking not supported\n"); yading@10: return AVERROR_PATCHWELCOME; yading@10: } yading@10: if (!s->bpp || s->bpp > 32) { yading@10: av_log(avctx, AV_LOG_ERROR, "Invalid number of bitplanes: %u\n", s->bpp); yading@10: return AVERROR_INVALIDDATA; yading@10: } else if (s->ham >= 8) { yading@10: av_log(avctx, AV_LOG_ERROR, "Invalid number of hold bits for HAM: %u\n", s->ham); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: yading@10: av_freep(&s->ham_buf); yading@10: av_freep(&s->ham_palbuf); yading@10: yading@10: if (s->ham) { yading@10: int i, count = FFMIN(palette_size / 3, 1 << s->ham); yading@10: int ham_count; yading@10: const uint8_t *const palette = avctx->extradata + AV_RB16(avctx->extradata); yading@10: yading@10: s->ham_buf = av_malloc((s->planesize * 8) + FF_INPUT_BUFFER_PADDING_SIZE); yading@10: if (!s->ham_buf) yading@10: return AVERROR(ENOMEM); yading@10: yading@10: ham_count = 8 * (1 << s->ham); yading@10: s->ham_palbuf = av_malloc((ham_count << !!(s->masking == MASK_HAS_MASK)) * sizeof (uint32_t) + FF_INPUT_BUFFER_PADDING_SIZE); yading@10: if (!s->ham_palbuf) { yading@10: av_freep(&s->ham_buf); yading@10: return AVERROR(ENOMEM); yading@10: } yading@10: yading@10: if (count) { // HAM with color palette attached yading@10: // prefill with black and palette and set HAM take direct value mask to zero yading@10: memset(s->ham_palbuf, 0, (1 << s->ham) * 2 * sizeof (uint32_t)); yading@10: for (i=0; i < count; i++) { yading@10: s->ham_palbuf[i*2+1] = 0xFF000000 | AV_RL24(palette + i*3); yading@10: } yading@10: count = 1 << s->ham; yading@10: } else { // HAM with grayscale color palette yading@10: count = 1 << s->ham; yading@10: for (i=0; i < count; i++) { yading@10: s->ham_palbuf[i*2] = 0xFF000000; // take direct color value from palette yading@10: s->ham_palbuf[i*2+1] = 0xFF000000 | av_le2ne32(gray2rgb((i * 255) >> s->ham)); yading@10: } yading@10: } yading@10: for (i=0; i < count; i++) { yading@10: uint32_t tmp = i << (8 - s->ham); yading@10: tmp |= tmp >> s->ham; yading@10: s->ham_palbuf[(i+count)*2] = 0xFF00FFFF; // just modify blue color component yading@10: s->ham_palbuf[(i+count*2)*2] = 0xFFFFFF00; // just modify red color component yading@10: s->ham_palbuf[(i+count*3)*2] = 0xFFFF00FF; // just modify green color component yading@10: s->ham_palbuf[(i+count)*2+1] = 0xFF000000 | tmp << 16; yading@10: s->ham_palbuf[(i+count*2)*2+1] = 0xFF000000 | tmp; yading@10: s->ham_palbuf[(i+count*3)*2+1] = 0xFF000000 | tmp << 8; yading@10: } yading@10: if (s->masking == MASK_HAS_MASK) { yading@10: for (i = 0; i < ham_count; i++) yading@10: s->ham_palbuf[(1 << s->bpp) + i] = s->ham_palbuf[i] | 0xFF000000; yading@10: } yading@10: } yading@10: } yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: static av_cold int decode_init(AVCodecContext *avctx) yading@10: { yading@10: IffContext *s = avctx->priv_data; yading@10: int err; yading@10: yading@10: if (avctx->bits_per_coded_sample <= 8) { yading@10: int palette_size; yading@10: yading@10: if (avctx->extradata_size >= 2) yading@10: palette_size = avctx->extradata_size - AV_RB16(avctx->extradata); yading@10: else yading@10: palette_size = 0; yading@10: avctx->pix_fmt = (avctx->bits_per_coded_sample < 8) || yading@10: (avctx->extradata_size >= 2 && palette_size) ? AV_PIX_FMT_PAL8 : AV_PIX_FMT_GRAY8; yading@10: } else if (avctx->bits_per_coded_sample <= 32) { yading@10: if (avctx->codec_tag == MKTAG('R','G','B','8')) { yading@10: avctx->pix_fmt = AV_PIX_FMT_RGB32; yading@10: } else if (avctx->codec_tag == MKTAG('R','G','B','N')) { yading@10: avctx->pix_fmt = AV_PIX_FMT_RGB444; yading@10: } else if (avctx->codec_tag != MKTAG('D','E','E','P')) { yading@10: if (avctx->bits_per_coded_sample == 24) { yading@10: avctx->pix_fmt = AV_PIX_FMT_0BGR32; yading@10: } else if (avctx->bits_per_coded_sample == 32) { yading@10: avctx->pix_fmt = AV_PIX_FMT_BGR32; yading@10: } else { yading@10: avpriv_request_sample(avctx, "unknown bits_per_coded_sample"); yading@10: return AVERROR_PATCHWELCOME; yading@10: } yading@10: } yading@10: } else { yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: yading@10: if ((err = av_image_check_size(avctx->width, avctx->height, 0, avctx))) yading@10: return err; yading@10: s->planesize = FFALIGN(avctx->width, 16) >> 3; // Align plane size in bits to word-boundary yading@10: s->planebuf = av_malloc(s->planesize + FF_INPUT_BUFFER_PADDING_SIZE); yading@10: if (!s->planebuf) yading@10: return AVERROR(ENOMEM); yading@10: yading@10: s->bpp = avctx->bits_per_coded_sample; yading@10: s->frame = av_frame_alloc(); yading@10: if (!s->frame) yading@10: return AVERROR(ENOMEM); yading@10: yading@10: if ((err = extract_header(avctx, NULL)) < 0) yading@10: return err; yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: /** yading@10: * Decode interleaved plane buffer up to 8bpp yading@10: * @param dst Destination buffer yading@10: * @param buf Source buffer yading@10: * @param buf_size yading@10: * @param plane plane number to decode as yading@10: */ yading@10: static void decodeplane8(uint8_t *dst, const uint8_t *buf, int buf_size, int plane) yading@10: { yading@10: const uint64_t *lut = plane8_lut[plane]; yading@10: if (plane >= 8) { yading@10: av_log(NULL, AV_LOG_WARNING, "Ignoring extra planes beyond 8\n"); yading@10: return; yading@10: } yading@10: do { yading@10: uint64_t v = AV_RN64A(dst) | lut[*buf++]; yading@10: AV_WN64A(dst, v); yading@10: dst += 8; yading@10: } while (--buf_size); yading@10: } yading@10: yading@10: /** yading@10: * Decode interleaved plane buffer up to 24bpp yading@10: * @param dst Destination buffer yading@10: * @param buf Source buffer yading@10: * @param buf_size yading@10: * @param plane plane number to decode as yading@10: */ yading@10: static void decodeplane32(uint32_t *dst, const uint8_t *buf, int buf_size, int plane) yading@10: { yading@10: const uint32_t *lut = plane32_lut[plane]; yading@10: do { yading@10: unsigned mask = (*buf >> 2) & ~3; yading@10: dst[0] |= lut[mask++]; yading@10: dst[1] |= lut[mask++]; yading@10: dst[2] |= lut[mask++]; yading@10: dst[3] |= lut[mask]; yading@10: mask = (*buf++ << 2) & 0x3F; yading@10: dst[4] |= lut[mask++]; yading@10: dst[5] |= lut[mask++]; yading@10: dst[6] |= lut[mask++]; yading@10: dst[7] |= lut[mask]; yading@10: dst += 8; yading@10: } while (--buf_size); yading@10: } yading@10: yading@10: #define DECODE_HAM_PLANE32(x) \ yading@10: first = buf[x] << 1; \ yading@10: second = buf[(x)+1] << 1; \ yading@10: delta &= pal[first++]; \ yading@10: delta |= pal[first]; \ yading@10: dst[x] = delta; \ yading@10: delta &= pal[second++]; \ yading@10: delta |= pal[second]; \ yading@10: dst[(x)+1] = delta yading@10: yading@10: /** yading@10: * Converts one line of HAM6/8-encoded chunky buffer to 24bpp. yading@10: * yading@10: * @param dst the destination 24bpp buffer yading@10: * @param buf the source 8bpp chunky buffer yading@10: * @param pal the HAM decode table yading@10: * @param buf_size the plane size in bytes yading@10: */ yading@10: static void decode_ham_plane32(uint32_t *dst, const uint8_t *buf, yading@10: const uint32_t *const pal, unsigned buf_size) yading@10: { yading@10: uint32_t delta = pal[1]; /* first palette entry */ yading@10: do { yading@10: uint32_t first, second; yading@10: DECODE_HAM_PLANE32(0); yading@10: DECODE_HAM_PLANE32(2); yading@10: DECODE_HAM_PLANE32(4); yading@10: DECODE_HAM_PLANE32(6); yading@10: buf += 8; yading@10: dst += 8; yading@10: } while (--buf_size); yading@10: } yading@10: yading@10: static void lookup_pal_indicies(uint32_t *dst, const uint32_t *buf, yading@10: const uint32_t *const pal, unsigned width) yading@10: { yading@10: do { yading@10: *dst++ = pal[*buf++]; yading@10: } while (--width); yading@10: } yading@10: yading@10: /** yading@10: * Decode one complete byterun1 encoded line. yading@10: * yading@10: * @param dst the destination buffer where to store decompressed bitstream yading@10: * @param dst_size the destination plane size in bytes yading@10: * @param buf the source byterun1 compressed bitstream yading@10: * @param buf_end the EOF of source byterun1 compressed bitstream yading@10: * @return number of consumed bytes in byterun1 compressed bitstream yading@10: */ yading@10: static int decode_byterun(uint8_t *dst, int dst_size, yading@10: const uint8_t *buf, const uint8_t *const buf_end) { yading@10: const uint8_t *const buf_start = buf; yading@10: unsigned x; yading@10: for (x = 0; x < dst_size && buf < buf_end;) { yading@10: unsigned length; yading@10: const int8_t value = *buf++; yading@10: if (value >= 0) { yading@10: length = value + 1; yading@10: memcpy(dst + x, buf, FFMIN3(length, dst_size - x, buf_end - buf)); yading@10: buf += length; yading@10: } else if (value > -128) { yading@10: length = -value + 1; yading@10: memset(dst + x, *buf++, FFMIN(length, dst_size - x)); yading@10: } else { // noop yading@10: continue; yading@10: } yading@10: x += length; yading@10: } yading@10: return buf - buf_start; yading@10: } yading@10: yading@10: #define DECODE_RGBX_COMMON(type) \ yading@10: if (!length) { \ yading@10: length = bytestream2_get_byte(gb); \ yading@10: if (!length) { \ yading@10: length = bytestream2_get_be16(gb); \ yading@10: if (!length) \ yading@10: return; \ yading@10: } \ yading@10: } \ yading@10: for (i = 0; i < length; i++) { \ yading@10: *(type *)(dst + y*linesize + x * sizeof(type)) = pixel; \ yading@10: x += 1; \ yading@10: if (x >= width) { \ yading@10: y += 1; \ yading@10: if (y >= height) \ yading@10: return; \ yading@10: x = 0; \ yading@10: } \ yading@10: } yading@10: yading@10: /** yading@10: * Decode RGB8 buffer yading@10: * @param[out] dst Destination buffer yading@10: * @param width Width of destination buffer (pixels) yading@10: * @param height Height of destination buffer (pixels) yading@10: * @param linesize Line size of destination buffer (bytes) yading@10: */ yading@10: static void decode_rgb8(GetByteContext *gb, uint8_t *dst, int width, int height, int linesize) yading@10: { yading@10: int x = 0, y = 0, i, length; yading@10: while (bytestream2_get_bytes_left(gb) >= 4) { yading@10: uint32_t pixel = 0xFF000000 | bytestream2_get_be24(gb); yading@10: length = bytestream2_get_byte(gb) & 0x7F; yading@10: DECODE_RGBX_COMMON(uint32_t) yading@10: } yading@10: } yading@10: yading@10: /** yading@10: * Decode RGBN buffer yading@10: * @param[out] dst Destination buffer yading@10: * @param width Width of destination buffer (pixels) yading@10: * @param height Height of destination buffer (pixels) yading@10: * @param linesize Line size of destination buffer (bytes) yading@10: */ yading@10: static void decode_rgbn(GetByteContext *gb, uint8_t *dst, int width, int height, int linesize) yading@10: { yading@10: int x = 0, y = 0, i, length; yading@10: while (bytestream2_get_bytes_left(gb) >= 2) { yading@10: uint32_t pixel = bytestream2_get_be16u(gb); yading@10: length = pixel & 0x7; yading@10: pixel >>= 4; yading@10: DECODE_RGBX_COMMON(uint16_t) yading@10: } yading@10: } yading@10: yading@10: /** yading@10: * Decode DEEP RLE 32-bit buffer yading@10: * @param[out] dst Destination buffer yading@10: * @param[in] src Source buffer yading@10: * @param src_size Source buffer size (bytes) yading@10: * @param width Width of destination buffer (pixels) yading@10: * @param height Height of destination buffer (pixels) yading@10: * @param linesize Line size of destination buffer (bytes) yading@10: */ yading@10: static void decode_deep_rle32(uint8_t *dst, const uint8_t *src, int src_size, int width, int height, int linesize) yading@10: { yading@10: const uint8_t *src_end = src + src_size; yading@10: int x = 0, y = 0, i; yading@10: while (src + 5 <= src_end) { yading@10: int opcode; yading@10: opcode = *(int8_t *)src++; yading@10: if (opcode >= 0) { yading@10: int size = opcode + 1; yading@10: for (i = 0; i < size; i++) { yading@10: int length = FFMIN(size - i, width); yading@10: memcpy(dst + y*linesize + x * 4, src, length * 4); yading@10: src += length * 4; yading@10: x += length; yading@10: i += length; yading@10: if (x >= width) { yading@10: x = 0; yading@10: y += 1; yading@10: if (y >= height) yading@10: return; yading@10: } yading@10: } yading@10: } else { yading@10: int size = -opcode + 1; yading@10: uint32_t pixel = AV_RN32(src); yading@10: for (i = 0; i < size; i++) { yading@10: *(uint32_t *)(dst + y*linesize + x * 4) = pixel; yading@10: x += 1; yading@10: if (x >= width) { yading@10: x = 0; yading@10: y += 1; yading@10: if (y >= height) yading@10: return; yading@10: } yading@10: } yading@10: src += 4; yading@10: } yading@10: } yading@10: } yading@10: yading@10: /** yading@10: * Decode DEEP TVDC 32-bit buffer yading@10: * @param[out] dst Destination buffer yading@10: * @param[in] src Source buffer yading@10: * @param src_size Source buffer size (bytes) yading@10: * @param width Width of destination buffer (pixels) yading@10: * @param height Height of destination buffer (pixels) yading@10: * @param linesize Line size of destination buffer (bytes) yading@10: * @param[int] tvdc TVDC lookup table yading@10: */ yading@10: static void decode_deep_tvdc32(uint8_t *dst, const uint8_t *src, int src_size, int width, int height, int linesize, const int16_t *tvdc) yading@10: { yading@10: int x = 0, y = 0, plane = 0; yading@10: int8_t pixel = 0; yading@10: int i, j; yading@10: yading@10: for (i = 0; i < src_size * 2;) { yading@10: #define GETNIBBLE ((i & 1) ? (src[i>>1] & 0xF) : (src[i>>1] >> 4)) yading@10: int d = tvdc[GETNIBBLE]; yading@10: i++; yading@10: if (d) { yading@10: pixel += d; yading@10: dst[y * linesize + x*4 + plane] = pixel; yading@10: x++; yading@10: } else { yading@10: if (i >= src_size * 2) yading@10: return; yading@10: d = GETNIBBLE + 1; yading@10: i++; yading@10: d = FFMIN(d, width - x); yading@10: for (j = 0; j < d; j++) { yading@10: dst[y * linesize + x*4 + plane] = pixel; yading@10: x++; yading@10: } yading@10: } yading@10: if (x >= width) { yading@10: plane++; yading@10: if (plane >= 4) { yading@10: y++; yading@10: if (y >= height) yading@10: return; yading@10: plane = 0; yading@10: } yading@10: x = 0; yading@10: pixel = 0; yading@10: i = (i + 1) & ~1; yading@10: } yading@10: } yading@10: } yading@10: yading@10: static int unsupported(AVCodecContext *avctx) yading@10: { yading@10: IffContext *s = avctx->priv_data; yading@10: avpriv_request_sample(avctx, "bitmap (compression %i, bpp %i, ham %i)", s->compression, s->bpp, s->ham); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: yading@10: static int decode_frame(AVCodecContext *avctx, yading@10: void *data, int *got_frame, yading@10: AVPacket *avpkt) yading@10: { yading@10: IffContext *s = avctx->priv_data; yading@10: const uint8_t *buf = avpkt->size >= 2 ? avpkt->data + AV_RB16(avpkt->data) : NULL; yading@10: const int buf_size = avpkt->size >= 2 ? avpkt->size - AV_RB16(avpkt->data) : 0; yading@10: const uint8_t *buf_end = buf+buf_size; yading@10: int y, plane, res; yading@10: GetByteContext gb; yading@10: yading@10: if ((res = extract_header(avctx, avpkt)) < 0) yading@10: return res; yading@10: if ((res = ff_reget_buffer(avctx, s->frame)) < 0) yading@10: return res; yading@10: if (!s->init && avctx->bits_per_coded_sample <= 8 && yading@10: avctx->pix_fmt == AV_PIX_FMT_PAL8) { yading@10: if ((res = cmap_read_palette(avctx, (uint32_t*)s->frame->data[1])) < 0) yading@10: return res; yading@10: } else if (!s->init && avctx->bits_per_coded_sample <= 8 && yading@10: avctx->pix_fmt == AV_PIX_FMT_RGB32) { yading@10: if ((res = cmap_read_palette(avctx, s->mask_palbuf)) < 0) yading@10: return res; yading@10: } yading@10: s->init = 1; yading@10: yading@10: switch (s->compression) { yading@10: case 0: yading@10: if (avctx->codec_tag == MKTAG('A','C','B','M')) { yading@10: if (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_PIX_FMT_GRAY8) { yading@10: memset(s->frame->data[0], 0, avctx->height * s->frame->linesize[0]); yading@10: for (plane = 0; plane < s->bpp; plane++) { yading@10: for(y = 0; y < avctx->height && buf < buf_end; y++ ) { yading@10: uint8_t *row = &s->frame->data[0][ y*s->frame->linesize[0] ]; yading@10: decodeplane8(row, buf, FFMIN(s->planesize, buf_end - buf), plane); yading@10: buf += s->planesize; yading@10: } yading@10: } yading@10: } else if (s->ham) { // HAM to AV_PIX_FMT_BGR32 yading@10: memset(s->frame->data[0], 0, avctx->height * s->frame->linesize[0]); yading@10: for(y = 0; y < avctx->height; y++) { yading@10: uint8_t *row = &s->frame->data[0][y * s->frame->linesize[0]]; yading@10: memset(s->ham_buf, 0, s->planesize * 8); yading@10: for (plane = 0; plane < s->bpp; plane++) { yading@10: const uint8_t * start = buf + (plane * avctx->height + y) * s->planesize; yading@10: if (start >= buf_end) yading@10: break; yading@10: decodeplane8(s->ham_buf, start, FFMIN(s->planesize, buf_end - start), plane); yading@10: } yading@10: decode_ham_plane32((uint32_t *) row, s->ham_buf, s->ham_palbuf, s->planesize); yading@10: } yading@10: } else yading@10: return unsupported(avctx); yading@10: } else if (avctx->codec_tag == MKTAG('D','E','E','P')) { yading@10: const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt); yading@10: int raw_width = avctx->width * (av_get_bits_per_pixel(desc) >> 3); yading@10: int x; yading@10: for(y = 0; y < avctx->height && buf < buf_end; y++ ) { yading@10: uint8_t *row = &s->frame->data[0][y * s->frame->linesize[0]]; yading@10: memcpy(row, buf, FFMIN(raw_width, buf_end - buf)); yading@10: buf += raw_width; yading@10: if (avctx->pix_fmt == AV_PIX_FMT_BGR32) { yading@10: for(x = 0; x < avctx->width; x++) yading@10: row[4 * x + 3] = row[4 * x + 3] & 0xF0 | (row[4 * x + 3] >> 4); yading@10: } yading@10: } yading@10: } else if (avctx->codec_tag == MKTAG('I','L','B','M')) { // interleaved yading@10: if (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_PIX_FMT_GRAY8) { yading@10: for(y = 0; y < avctx->height; y++ ) { yading@10: uint8_t *row = &s->frame->data[0][ y*s->frame->linesize[0] ]; yading@10: memset(row, 0, avctx->width); yading@10: for (plane = 0; plane < s->bpp && buf < buf_end; plane++) { yading@10: decodeplane8(row, buf, FFMIN(s->planesize, buf_end - buf), plane); yading@10: buf += s->planesize; yading@10: } yading@10: } yading@10: } else if (s->ham) { // HAM to AV_PIX_FMT_BGR32 yading@10: for (y = 0; y < avctx->height; y++) { yading@10: uint8_t *row = &s->frame->data[0][ y*s->frame->linesize[0] ]; yading@10: memset(s->ham_buf, 0, s->planesize * 8); yading@10: for (plane = 0; plane < s->bpp && buf < buf_end; plane++) { yading@10: decodeplane8(s->ham_buf, buf, FFMIN(s->planesize, buf_end - buf), plane); yading@10: buf += s->planesize; yading@10: } yading@10: decode_ham_plane32((uint32_t *) row, s->ham_buf, s->ham_palbuf, s->planesize); yading@10: } yading@10: } else { // AV_PIX_FMT_BGR32 yading@10: for(y = 0; y < avctx->height; y++ ) { yading@10: uint8_t *row = &s->frame->data[0][y*s->frame->linesize[0]]; yading@10: memset(row, 0, avctx->width << 2); yading@10: for (plane = 0; plane < s->bpp && buf < buf_end; plane++) { yading@10: decodeplane32((uint32_t *) row, buf, FFMIN(s->planesize, buf_end - buf), plane); yading@10: buf += s->planesize; yading@10: } yading@10: } yading@10: } yading@10: } else if (avctx->codec_tag == MKTAG('P','B','M',' ')) { // IFF-PBM yading@10: if (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_PIX_FMT_GRAY8) { yading@10: for(y = 0; y < avctx->height && buf_end > buf; y++ ) { yading@10: uint8_t *row = &s->frame->data[0][y * s->frame->linesize[0]]; yading@10: memcpy(row, buf, FFMIN(avctx->width, buf_end - buf)); yading@10: buf += avctx->width + (avctx->width % 2); // padding if odd yading@10: } yading@10: } else if (s->ham) { // IFF-PBM: HAM to AV_PIX_FMT_BGR32 yading@10: for (y = 0; y < avctx->height && buf_end > buf; y++) { yading@10: uint8_t *row = &s->frame->data[0][ y*s->frame->linesize[0] ]; yading@10: memcpy(s->ham_buf, buf, FFMIN(avctx->width, buf_end - buf)); yading@10: buf += avctx->width + (avctx->width & 1); // padding if odd yading@10: decode_ham_plane32((uint32_t *) row, s->ham_buf, s->ham_palbuf, s->planesize); yading@10: } yading@10: } else yading@10: return unsupported(avctx); yading@10: } yading@10: break; yading@10: case 1: yading@10: if (avctx->codec_tag == MKTAG('I','L','B','M')) { //interleaved yading@10: if (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_PIX_FMT_GRAY8) { yading@10: for(y = 0; y < avctx->height ; y++ ) { yading@10: uint8_t *row = &s->frame->data[0][ y*s->frame->linesize[0] ]; yading@10: memset(row, 0, avctx->width); yading@10: for (plane = 0; plane < s->bpp; plane++) { yading@10: buf += decode_byterun(s->planebuf, s->planesize, buf, buf_end); yading@10: decodeplane8(row, s->planebuf, s->planesize, plane); yading@10: } yading@10: } yading@10: } else if (avctx->bits_per_coded_sample <= 8) { //8-bit (+ mask) to AV_PIX_FMT_BGR32 yading@10: for (y = 0; y < avctx->height ; y++ ) { yading@10: uint8_t *row = &s->frame->data[0][y*s->frame->linesize[0]]; yading@10: memset(s->mask_buf, 0, avctx->width * sizeof(uint32_t)); yading@10: for (plane = 0; plane < s->bpp; plane++) { yading@10: buf += decode_byterun(s->planebuf, s->planesize, buf, buf_end); yading@10: decodeplane32(s->mask_buf, s->planebuf, s->planesize, plane); yading@10: } yading@10: lookup_pal_indicies((uint32_t *) row, s->mask_buf, s->mask_palbuf, avctx->width); yading@10: } yading@10: } else if (s->ham) { // HAM to AV_PIX_FMT_BGR32 yading@10: for (y = 0; y < avctx->height ; y++) { yading@10: uint8_t *row = &s->frame->data[0][y*s->frame->linesize[0]]; yading@10: memset(s->ham_buf, 0, s->planesize * 8); yading@10: for (plane = 0; plane < s->bpp; plane++) { yading@10: buf += decode_byterun(s->planebuf, s->planesize, buf, buf_end); yading@10: decodeplane8(s->ham_buf, s->planebuf, s->planesize, plane); yading@10: } yading@10: decode_ham_plane32((uint32_t *) row, s->ham_buf, s->ham_palbuf, s->planesize); yading@10: } yading@10: } else { //AV_PIX_FMT_BGR32 yading@10: for(y = 0; y < avctx->height ; y++ ) { yading@10: uint8_t *row = &s->frame->data[0][y*s->frame->linesize[0]]; yading@10: memset(row, 0, avctx->width << 2); yading@10: for (plane = 0; plane < s->bpp; plane++) { yading@10: buf += decode_byterun(s->planebuf, s->planesize, buf, buf_end); yading@10: decodeplane32((uint32_t *) row, s->planebuf, s->planesize, plane); yading@10: } yading@10: } yading@10: } yading@10: } else if (avctx->codec_tag == MKTAG('P','B','M',' ')) { // IFF-PBM yading@10: if (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_PIX_FMT_GRAY8) { yading@10: for(y = 0; y < avctx->height ; y++ ) { yading@10: uint8_t *row = &s->frame->data[0][y*s->frame->linesize[0]]; yading@10: buf += decode_byterun(row, avctx->width, buf, buf_end); yading@10: } yading@10: } else if (s->ham) { // IFF-PBM: HAM to AV_PIX_FMT_BGR32 yading@10: for (y = 0; y < avctx->height ; y++) { yading@10: uint8_t *row = &s->frame->data[0][y*s->frame->linesize[0]]; yading@10: buf += decode_byterun(s->ham_buf, avctx->width, buf, buf_end); yading@10: decode_ham_plane32((uint32_t *) row, s->ham_buf, s->ham_palbuf, s->planesize); yading@10: } yading@10: } else yading@10: return unsupported(avctx); yading@10: } else if (avctx->codec_tag == MKTAG('D','E','E','P')) { // IFF-DEEP yading@10: const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt); yading@10: if (av_get_bits_per_pixel(desc) == 32) yading@10: decode_deep_rle32(s->frame->data[0], buf, buf_size, avctx->width, avctx->height, s->frame->linesize[0]); yading@10: else yading@10: return unsupported(avctx); yading@10: } yading@10: break; yading@10: case 4: yading@10: bytestream2_init(&gb, buf, buf_size); yading@10: if (avctx->codec_tag == MKTAG('R','G','B','8')) yading@10: decode_rgb8(&gb, s->frame->data[0], avctx->width, avctx->height, s->frame->linesize[0]); yading@10: else if (avctx->codec_tag == MKTAG('R','G','B','N')) yading@10: decode_rgbn(&gb, s->frame->data[0], avctx->width, avctx->height, s->frame->linesize[0]); yading@10: else yading@10: return unsupported(avctx); yading@10: break; yading@10: case 5: yading@10: if (avctx->codec_tag == MKTAG('D','E','E','P')) { yading@10: const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt); yading@10: if (av_get_bits_per_pixel(desc) == 32) yading@10: decode_deep_tvdc32(s->frame->data[0], buf, buf_size, avctx->width, avctx->height, s->frame->linesize[0], s->tvdc); yading@10: else yading@10: return unsupported(avctx); yading@10: } else yading@10: return unsupported(avctx); yading@10: break; yading@10: default: yading@10: return unsupported(avctx); yading@10: } yading@10: yading@10: if ((res = av_frame_ref(data, s->frame)) < 0) yading@10: return res; yading@10: yading@10: *got_frame = 1; yading@10: yading@10: return buf_size; yading@10: } yading@10: yading@10: static av_cold int decode_end(AVCodecContext *avctx) yading@10: { yading@10: IffContext *s = avctx->priv_data; yading@10: av_frame_free(&s->frame); yading@10: av_freep(&s->planebuf); yading@10: av_freep(&s->ham_buf); yading@10: av_freep(&s->ham_palbuf); yading@10: return 0; yading@10: } yading@10: yading@10: #if CONFIG_IFF_ILBM_DECODER yading@10: AVCodec ff_iff_ilbm_decoder = { yading@10: .name = "iff", yading@10: .type = AVMEDIA_TYPE_VIDEO, yading@10: .id = AV_CODEC_ID_IFF_ILBM, yading@10: .priv_data_size = sizeof(IffContext), yading@10: .init = decode_init, yading@10: .close = decode_end, yading@10: .decode = decode_frame, yading@10: .capabilities = CODEC_CAP_DR1, yading@10: .long_name = NULL_IF_CONFIG_SMALL("IFF"), yading@10: }; yading@10: #endif yading@10: #if CONFIG_IFF_BYTERUN1_DECODER yading@10: AVCodec ff_iff_byterun1_decoder = { yading@10: .name = "iff", yading@10: .type = AVMEDIA_TYPE_VIDEO, yading@10: .id = AV_CODEC_ID_IFF_BYTERUN1, yading@10: .priv_data_size = sizeof(IffContext), yading@10: .init = decode_init, yading@10: .close = decode_end, yading@10: .decode = decode_frame, yading@10: .capabilities = CODEC_CAP_DR1, yading@10: .long_name = NULL_IF_CONFIG_SMALL("IFF"), yading@10: }; yading@10: #endif