| /* |
| * IFF ACBM/DEEP/ILBM/PBM bitmap decoder |
| * Copyright (c) 2010 Peter Ross <pross@xvid.org> |
| * Copyright (c) 2010 Sebastian Vater <cdgs.basty@googlemail.com> |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg 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. |
| * |
| * FFmpeg 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 FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| /** |
| * @file |
| * IFF ACBM/DEEP/ILBM/PBM bitmap decoder |
| */ |
| |
| #include <stdint.h> |
| |
| #include "libavutil/imgutils.h" |
| #include "bytestream.h" |
| #include "avcodec.h" |
| #include "get_bits.h" |
| #include "internal.h" |
| |
| // TODO: masking bits |
| typedef enum { |
| MASK_NONE, |
| MASK_HAS_MASK, |
| MASK_HAS_TRANSPARENT_COLOR, |
| MASK_LASSO |
| } mask_type; |
| |
| typedef struct IffContext { |
| AVFrame *frame; |
| int planesize; |
| uint8_t * planebuf; |
| uint8_t * ham_buf; ///< temporary buffer for planar to chunky conversation |
| uint32_t *ham_palbuf; ///< HAM decode table |
| uint32_t *mask_buf; ///< temporary buffer for palette indices |
| uint32_t *mask_palbuf; ///< masking palette table |
| unsigned compression; ///< delta compression method used |
| unsigned bpp; ///< bits per plane to decode (differs from bits_per_coded_sample if HAM) |
| unsigned ham; ///< 0 if non-HAM or number of hold bits (6 for bpp > 6, 4 otherwise) |
| unsigned flags; ///< 1 for EHB, 0 is no extra half darkening |
| unsigned transparency; ///< TODO: transparency color index in palette |
| unsigned masking; ///< TODO: masking method used |
| int init; // 1 if buffer and palette data already initialized, 0 otherwise |
| int16_t tvdc[16]; ///< TVDC lookup table |
| } IffContext; |
| |
| #define LUT8_PART(plane, v) \ |
| AV_LE2NE64C(UINT64_C(0x0000000)<<32 | v) << plane, \ |
| AV_LE2NE64C(UINT64_C(0x1000000)<<32 | v) << plane, \ |
| AV_LE2NE64C(UINT64_C(0x0010000)<<32 | v) << plane, \ |
| AV_LE2NE64C(UINT64_C(0x1010000)<<32 | v) << plane, \ |
| AV_LE2NE64C(UINT64_C(0x0000100)<<32 | v) << plane, \ |
| AV_LE2NE64C(UINT64_C(0x1000100)<<32 | v) << plane, \ |
| AV_LE2NE64C(UINT64_C(0x0010100)<<32 | v) << plane, \ |
| AV_LE2NE64C(UINT64_C(0x1010100)<<32 | v) << plane, \ |
| AV_LE2NE64C(UINT64_C(0x0000001)<<32 | v) << plane, \ |
| AV_LE2NE64C(UINT64_C(0x1000001)<<32 | v) << plane, \ |
| AV_LE2NE64C(UINT64_C(0x0010001)<<32 | v) << plane, \ |
| AV_LE2NE64C(UINT64_C(0x1010001)<<32 | v) << plane, \ |
| AV_LE2NE64C(UINT64_C(0x0000101)<<32 | v) << plane, \ |
| AV_LE2NE64C(UINT64_C(0x1000101)<<32 | v) << plane, \ |
| AV_LE2NE64C(UINT64_C(0x0010101)<<32 | v) << plane, \ |
| AV_LE2NE64C(UINT64_C(0x1010101)<<32 | v) << plane |
| |
| #define LUT8(plane) { \ |
| LUT8_PART(plane, 0x0000000), \ |
| LUT8_PART(plane, 0x1000000), \ |
| LUT8_PART(plane, 0x0010000), \ |
| LUT8_PART(plane, 0x1010000), \ |
| LUT8_PART(plane, 0x0000100), \ |
| LUT8_PART(plane, 0x1000100), \ |
| LUT8_PART(plane, 0x0010100), \ |
| LUT8_PART(plane, 0x1010100), \ |
| LUT8_PART(plane, 0x0000001), \ |
| LUT8_PART(plane, 0x1000001), \ |
| LUT8_PART(plane, 0x0010001), \ |
| LUT8_PART(plane, 0x1010001), \ |
| LUT8_PART(plane, 0x0000101), \ |
| LUT8_PART(plane, 0x1000101), \ |
| LUT8_PART(plane, 0x0010101), \ |
| LUT8_PART(plane, 0x1010101), \ |
| } |
| |
| // 8 planes * 8-bit mask |
| static const uint64_t plane8_lut[8][256] = { |
| LUT8(0), LUT8(1), LUT8(2), LUT8(3), |
| LUT8(4), LUT8(5), LUT8(6), LUT8(7), |
| }; |
| |
| #define LUT32(plane) { \ |
| 0, 0, 0, 0, \ |
| 0, 0, 0, 1 << plane, \ |
| 0, 0, 1 << plane, 0, \ |
| 0, 0, 1 << plane, 1 << plane, \ |
| 0, 1 << plane, 0, 0, \ |
| 0, 1 << plane, 0, 1 << plane, \ |
| 0, 1 << plane, 1 << plane, 0, \ |
| 0, 1 << plane, 1 << plane, 1 << plane, \ |
| 1 << plane, 0, 0, 0, \ |
| 1 << plane, 0, 0, 1 << plane, \ |
| 1 << plane, 0, 1 << plane, 0, \ |
| 1 << plane, 0, 1 << plane, 1 << plane, \ |
| 1 << plane, 1 << plane, 0, 0, \ |
| 1 << plane, 1 << plane, 0, 1 << plane, \ |
| 1 << plane, 1 << plane, 1 << plane, 0, \ |
| 1 << plane, 1 << plane, 1 << plane, 1 << plane, \ |
| } |
| |
| // 32 planes * 4-bit mask * 4 lookup tables each |
| static const uint32_t plane32_lut[32][16*4] = { |
| LUT32( 0), LUT32( 1), LUT32( 2), LUT32( 3), |
| LUT32( 4), LUT32( 5), LUT32( 6), LUT32( 7), |
| LUT32( 8), LUT32( 9), LUT32(10), LUT32(11), |
| LUT32(12), LUT32(13), LUT32(14), LUT32(15), |
| LUT32(16), LUT32(17), LUT32(18), LUT32(19), |
| LUT32(20), LUT32(21), LUT32(22), LUT32(23), |
| LUT32(24), LUT32(25), LUT32(26), LUT32(27), |
| LUT32(28), LUT32(29), LUT32(30), LUT32(31), |
| }; |
| |
| // Gray to RGB, required for palette table of grayscale images with bpp < 8 |
| static av_always_inline uint32_t gray2rgb(const uint32_t x) { |
| return x << 16 | x << 8 | x; |
| } |
| |
| /** |
| * Convert CMAP buffer (stored in extradata) to lavc palette format |
| */ |
| static int cmap_read_palette(AVCodecContext *avctx, uint32_t *pal) |
| { |
| IffContext *s = avctx->priv_data; |
| int count, i; |
| const uint8_t *const palette = avctx->extradata + AV_RB16(avctx->extradata); |
| int palette_size = avctx->extradata_size - AV_RB16(avctx->extradata); |
| |
| if (avctx->bits_per_coded_sample > 8) { |
| av_log(avctx, AV_LOG_ERROR, "bits_per_coded_sample > 8 not supported\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| count = 1 << avctx->bits_per_coded_sample; |
| // If extradata is smaller than actually needed, fill the remaining with black. |
| count = FFMIN(palette_size / 3, count); |
| if (count) { |
| for (i = 0; i < count; i++) |
| pal[i] = 0xFF000000 | AV_RB24(palette + i*3); |
| if (s->flags && count >= 32) { // EHB |
| for (i = 0; i < 32; i++) |
| pal[i + 32] = 0xFF000000 | (AV_RB24(palette + i*3) & 0xFEFEFE) >> 1; |
| count = FFMAX(count, 64); |
| } |
| } else { // Create gray-scale color palette for bps < 8 |
| count = 1 << avctx->bits_per_coded_sample; |
| |
| for (i = 0; i < count; i++) |
| pal[i] = 0xFF000000 | gray2rgb((i * 255) >> avctx->bits_per_coded_sample); |
| } |
| if (s->masking == MASK_HAS_MASK) { |
| memcpy(pal + (1 << avctx->bits_per_coded_sample), pal, count * 4); |
| for (i = 0; i < count; i++) |
| pal[i] &= 0xFFFFFF; |
| } else if (s->masking == MASK_HAS_TRANSPARENT_COLOR && |
| s->transparency < 1 << avctx->bits_per_coded_sample) |
| pal[s->transparency] &= 0xFFFFFF; |
| return 0; |
| } |
| |
| /** |
| * Extracts the IFF extra context and updates internal |
| * decoder structures. |
| * |
| * @param avctx the AVCodecContext where to extract extra context to |
| * @param avpkt the AVPacket to extract extra context from or NULL to use avctx |
| * @return >= 0 in case of success, a negative error code otherwise |
| */ |
| static int extract_header(AVCodecContext *const avctx, |
| const AVPacket *const avpkt) { |
| const uint8_t *buf; |
| unsigned buf_size; |
| IffContext *s = avctx->priv_data; |
| int i, palette_size; |
| |
| if (avctx->extradata_size < 2) { |
| av_log(avctx, AV_LOG_ERROR, "not enough extradata\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| palette_size = avctx->extradata_size - AV_RB16(avctx->extradata); |
| |
| if (avpkt) { |
| int image_size; |
| if (avpkt->size < 2) |
| return AVERROR_INVALIDDATA; |
| image_size = avpkt->size - AV_RB16(avpkt->data); |
| buf = avpkt->data; |
| buf_size = bytestream_get_be16(&buf); |
| if (buf_size <= 1 || image_size <= 1) { |
| av_log(avctx, AV_LOG_ERROR, |
| "Invalid image size received: %u -> image data offset: %d\n", |
| buf_size, image_size); |
| return AVERROR_INVALIDDATA; |
| } |
| } else { |
| buf = avctx->extradata; |
| buf_size = bytestream_get_be16(&buf); |
| if (buf_size <= 1 || palette_size < 0) { |
| av_log(avctx, AV_LOG_ERROR, |
| "Invalid palette size received: %u -> palette data offset: %d\n", |
| buf_size, palette_size); |
| return AVERROR_INVALIDDATA; |
| } |
| } |
| |
| if (buf_size >= 41) { |
| s->compression = bytestream_get_byte(&buf); |
| s->bpp = bytestream_get_byte(&buf); |
| s->ham = bytestream_get_byte(&buf); |
| s->flags = bytestream_get_byte(&buf); |
| s->transparency = bytestream_get_be16(&buf); |
| s->masking = bytestream_get_byte(&buf); |
| for (i = 0; i < 16; i++) |
| s->tvdc[i] = bytestream_get_be16(&buf); |
| |
| if (s->masking == MASK_HAS_MASK) { |
| if (s->bpp >= 8 && !s->ham) { |
| avctx->pix_fmt = AV_PIX_FMT_RGB32; |
| av_freep(&s->mask_buf); |
| av_freep(&s->mask_palbuf); |
| s->mask_buf = av_malloc((s->planesize * 32) + AV_INPUT_BUFFER_PADDING_SIZE); |
| if (!s->mask_buf) |
| return AVERROR(ENOMEM); |
| if (s->bpp > 16) { |
| av_log(avctx, AV_LOG_ERROR, "bpp %d too large for palette\n", s->bpp); |
| av_freep(&s->mask_buf); |
| return AVERROR(ENOMEM); |
| } |
| s->mask_palbuf = av_malloc((2 << s->bpp) * sizeof(uint32_t) + AV_INPUT_BUFFER_PADDING_SIZE); |
| if (!s->mask_palbuf) { |
| av_freep(&s->mask_buf); |
| return AVERROR(ENOMEM); |
| } |
| } |
| s->bpp++; |
| } else if (s->masking != MASK_NONE && s->masking != MASK_HAS_TRANSPARENT_COLOR) { |
| av_log(avctx, AV_LOG_ERROR, "Masking not supported\n"); |
| return AVERROR_PATCHWELCOME; |
| } |
| if (!s->bpp || s->bpp > 32) { |
| av_log(avctx, AV_LOG_ERROR, "Invalid number of bitplanes: %u\n", s->bpp); |
| return AVERROR_INVALIDDATA; |
| } else if (s->ham >= 8) { |
| av_log(avctx, AV_LOG_ERROR, "Invalid number of hold bits for HAM: %u\n", s->ham); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| av_freep(&s->ham_buf); |
| av_freep(&s->ham_palbuf); |
| |
| if (s->ham) { |
| int i, count = FFMIN(palette_size / 3, 1 << s->ham); |
| int ham_count; |
| const uint8_t *const palette = avctx->extradata + AV_RB16(avctx->extradata); |
| |
| s->ham_buf = av_malloc((s->planesize * 8) + AV_INPUT_BUFFER_PADDING_SIZE); |
| if (!s->ham_buf) |
| return AVERROR(ENOMEM); |
| |
| ham_count = 8 * (1 << s->ham); |
| s->ham_palbuf = av_malloc((ham_count << !!(s->masking == MASK_HAS_MASK)) * sizeof (uint32_t) + AV_INPUT_BUFFER_PADDING_SIZE); |
| if (!s->ham_palbuf) { |
| av_freep(&s->ham_buf); |
| return AVERROR(ENOMEM); |
| } |
| |
| if (count) { // HAM with color palette attached |
| // prefill with black and palette and set HAM take direct value mask to zero |
| memset(s->ham_palbuf, 0, (1 << s->ham) * 2 * sizeof (uint32_t)); |
| for (i=0; i < count; i++) { |
| s->ham_palbuf[i*2+1] = 0xFF000000 | AV_RL24(palette + i*3); |
| } |
| count = 1 << s->ham; |
| } else { // HAM with grayscale color palette |
| count = 1 << s->ham; |
| for (i=0; i < count; i++) { |
| s->ham_palbuf[i*2] = 0xFF000000; // take direct color value from palette |
| s->ham_palbuf[i*2+1] = 0xFF000000 | av_le2ne32(gray2rgb((i * 255) >> s->ham)); |
| } |
| } |
| for (i=0; i < count; i++) { |
| uint32_t tmp = i << (8 - s->ham); |
| tmp |= tmp >> s->ham; |
| s->ham_palbuf[(i+count)*2] = 0xFF00FFFF; // just modify blue color component |
| s->ham_palbuf[(i+count*2)*2] = 0xFFFFFF00; // just modify red color component |
| s->ham_palbuf[(i+count*3)*2] = 0xFFFF00FF; // just modify green color component |
| s->ham_palbuf[(i+count)*2+1] = 0xFF000000 | tmp << 16; |
| s->ham_palbuf[(i+count*2)*2+1] = 0xFF000000 | tmp; |
| s->ham_palbuf[(i+count*3)*2+1] = 0xFF000000 | tmp << 8; |
| } |
| if (s->masking == MASK_HAS_MASK) { |
| for (i = 0; i < ham_count; i++) |
| s->ham_palbuf[(1 << s->bpp) + i] = s->ham_palbuf[i] | 0xFF000000; |
| } |
| } |
| } |
| |
| return 0; |
| } |
| |
| static av_cold int decode_end(AVCodecContext *avctx) |
| { |
| IffContext *s = avctx->priv_data; |
| av_frame_free(&s->frame); |
| av_freep(&s->planebuf); |
| av_freep(&s->ham_buf); |
| av_freep(&s->ham_palbuf); |
| return 0; |
| } |
| |
| static av_cold int decode_init(AVCodecContext *avctx) |
| { |
| IffContext *s = avctx->priv_data; |
| int err; |
| |
| if (avctx->bits_per_coded_sample <= 8) { |
| int palette_size; |
| |
| if (avctx->extradata_size >= 2) |
| palette_size = avctx->extradata_size - AV_RB16(avctx->extradata); |
| else |
| palette_size = 0; |
| avctx->pix_fmt = (avctx->bits_per_coded_sample < 8) || |
| (avctx->extradata_size >= 2 && palette_size) ? AV_PIX_FMT_PAL8 : AV_PIX_FMT_GRAY8; |
| } else if (avctx->bits_per_coded_sample <= 32) { |
| if (avctx->codec_tag == MKTAG('R', 'G', 'B', '8')) { |
| avctx->pix_fmt = AV_PIX_FMT_RGB32; |
| } else if (avctx->codec_tag == MKTAG('R', 'G', 'B', 'N')) { |
| avctx->pix_fmt = AV_PIX_FMT_RGB444; |
| } else if (avctx->codec_tag != MKTAG('D', 'E', 'E', 'P')) { |
| if (avctx->bits_per_coded_sample == 24) { |
| avctx->pix_fmt = AV_PIX_FMT_0BGR32; |
| } else if (avctx->bits_per_coded_sample == 32) { |
| avctx->pix_fmt = AV_PIX_FMT_BGR32; |
| } else { |
| avpriv_request_sample(avctx, "unknown bits_per_coded_sample"); |
| return AVERROR_PATCHWELCOME; |
| } |
| } |
| } else { |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if ((err = av_image_check_size(avctx->width, avctx->height, 0, avctx))) |
| return err; |
| s->planesize = FFALIGN(avctx->width, 16) >> 3; // Align plane size in bits to word-boundary |
| s->planebuf = av_malloc(s->planesize + AV_INPUT_BUFFER_PADDING_SIZE); |
| if (!s->planebuf) |
| return AVERROR(ENOMEM); |
| |
| s->bpp = avctx->bits_per_coded_sample; |
| s->frame = av_frame_alloc(); |
| if (!s->frame) { |
| decode_end(avctx); |
| return AVERROR(ENOMEM); |
| } |
| |
| if ((err = extract_header(avctx, NULL)) < 0) |
| return err; |
| |
| return 0; |
| } |
| |
| /** |
| * Decode interleaved plane buffer up to 8bpp |
| * @param dst Destination buffer |
| * @param buf Source buffer |
| * @param buf_size |
| * @param plane plane number to decode as |
| */ |
| static void decodeplane8(uint8_t *dst, const uint8_t *buf, int buf_size, int plane) |
| { |
| const uint64_t *lut = plane8_lut[plane]; |
| if (plane >= 8) { |
| av_log(NULL, AV_LOG_WARNING, "Ignoring extra planes beyond 8\n"); |
| return; |
| } |
| do { |
| uint64_t v = AV_RN64A(dst) | lut[*buf++]; |
| AV_WN64A(dst, v); |
| dst += 8; |
| } while (--buf_size); |
| } |
| |
| /** |
| * Decode interleaved plane buffer up to 24bpp |
| * @param dst Destination buffer |
| * @param buf Source buffer |
| * @param buf_size |
| * @param plane plane number to decode as |
| */ |
| static void decodeplane32(uint32_t *dst, const uint8_t *buf, int buf_size, int plane) |
| { |
| const uint32_t *lut = plane32_lut[plane]; |
| do { |
| unsigned mask = (*buf >> 2) & ~3; |
| dst[0] |= lut[mask++]; |
| dst[1] |= lut[mask++]; |
| dst[2] |= lut[mask++]; |
| dst[3] |= lut[mask]; |
| mask = (*buf++ << 2) & 0x3F; |
| dst[4] |= lut[mask++]; |
| dst[5] |= lut[mask++]; |
| dst[6] |= lut[mask++]; |
| dst[7] |= lut[mask]; |
| dst += 8; |
| } while (--buf_size); |
| } |
| |
| #define DECODE_HAM_PLANE32(x) \ |
| first = buf[x] << 1; \ |
| second = buf[(x)+1] << 1; \ |
| delta &= pal[first++]; \ |
| delta |= pal[first]; \ |
| dst[x] = delta; \ |
| delta &= pal[second++]; \ |
| delta |= pal[second]; \ |
| dst[(x)+1] = delta |
| |
| /** |
| * Converts one line of HAM6/8-encoded chunky buffer to 24bpp. |
| * |
| * @param dst the destination 24bpp buffer |
| * @param buf the source 8bpp chunky buffer |
| * @param pal the HAM decode table |
| * @param buf_size the plane size in bytes |
| */ |
| static void decode_ham_plane32(uint32_t *dst, const uint8_t *buf, |
| const uint32_t *const pal, unsigned buf_size) |
| { |
| uint32_t delta = pal[1]; /* first palette entry */ |
| do { |
| uint32_t first, second; |
| DECODE_HAM_PLANE32(0); |
| DECODE_HAM_PLANE32(2); |
| DECODE_HAM_PLANE32(4); |
| DECODE_HAM_PLANE32(6); |
| buf += 8; |
| dst += 8; |
| } while (--buf_size); |
| } |
| |
| static void lookup_pal_indicies(uint32_t *dst, const uint32_t *buf, |
| const uint32_t *const pal, unsigned width) |
| { |
| do { |
| *dst++ = pal[*buf++]; |
| } while (--width); |
| } |
| |
| /** |
| * Decode one complete byterun1 encoded line. |
| * |
| * @param dst the destination buffer where to store decompressed bitstream |
| * @param dst_size the destination plane size in bytes |
| * @param buf the source byterun1 compressed bitstream |
| * @param buf_end the EOF of source byterun1 compressed bitstream |
| * @return number of consumed bytes in byterun1 compressed bitstream |
| */ |
| static int decode_byterun(uint8_t *dst, int dst_size, |
| const uint8_t *buf, const uint8_t *const buf_end) |
| { |
| const uint8_t *const buf_start = buf; |
| unsigned x; |
| for (x = 0; x < dst_size && buf < buf_end;) { |
| unsigned length; |
| const int8_t value = *buf++; |
| if (value >= 0) { |
| length = FFMIN3(value + 1, dst_size - x, buf_end - buf); |
| memcpy(dst + x, buf, length); |
| buf += length; |
| } else if (value > -128) { |
| length = FFMIN(-value + 1, dst_size - x); |
| memset(dst + x, *buf++, length); |
| } else { // noop |
| continue; |
| } |
| x += length; |
| } |
| if (x < dst_size) { |
| av_log(NULL, AV_LOG_WARNING, "decode_byterun ended before plane size\n"); |
| memset(dst+x, 0, dst_size - x); |
| } |
| return buf - buf_start; |
| } |
| |
| #define DECODE_RGBX_COMMON(type) \ |
| if (!length) { \ |
| length = bytestream2_get_byte(gb); \ |
| if (!length) { \ |
| length = bytestream2_get_be16(gb); \ |
| if (!length) \ |
| return; \ |
| } \ |
| } \ |
| for (i = 0; i < length; i++) { \ |
| *(type *)(dst + y*linesize + x * sizeof(type)) = pixel; \ |
| x += 1; \ |
| if (x >= width) { \ |
| y += 1; \ |
| if (y >= height) \ |
| return; \ |
| x = 0; \ |
| } \ |
| } |
| |
| /** |
| * Decode RGB8 buffer |
| * @param[out] dst Destination buffer |
| * @param width Width of destination buffer (pixels) |
| * @param height Height of destination buffer (pixels) |
| * @param linesize Line size of destination buffer (bytes) |
| */ |
| static void decode_rgb8(GetByteContext *gb, uint8_t *dst, int width, int height, int linesize) |
| { |
| int x = 0, y = 0, i, length; |
| while (bytestream2_get_bytes_left(gb) >= 4) { |
| uint32_t pixel = 0xFF000000 | bytestream2_get_be24(gb); |
| length = bytestream2_get_byte(gb) & 0x7F; |
| DECODE_RGBX_COMMON(uint32_t) |
| } |
| } |
| |
| /** |
| * Decode RGBN buffer |
| * @param[out] dst Destination buffer |
| * @param width Width of destination buffer (pixels) |
| * @param height Height of destination buffer (pixels) |
| * @param linesize Line size of destination buffer (bytes) |
| */ |
| static void decode_rgbn(GetByteContext *gb, uint8_t *dst, int width, int height, int linesize) |
| { |
| int x = 0, y = 0, i, length; |
| while (bytestream2_get_bytes_left(gb) >= 2) { |
| uint32_t pixel = bytestream2_get_be16u(gb); |
| length = pixel & 0x7; |
| pixel >>= 4; |
| DECODE_RGBX_COMMON(uint16_t) |
| } |
| } |
| |
| /** |
| * Decode DEEP RLE 32-bit buffer |
| * @param[out] dst Destination buffer |
| * @param[in] src Source buffer |
| * @param src_size Source buffer size (bytes) |
| * @param width Width of destination buffer (pixels) |
| * @param height Height of destination buffer (pixels) |
| * @param linesize Line size of destination buffer (bytes) |
| */ |
| static void decode_deep_rle32(uint8_t *dst, const uint8_t *src, int src_size, int width, int height, int linesize) |
| { |
| const uint8_t *src_end = src + src_size; |
| int x = 0, y = 0, i; |
| while (src + 5 <= src_end) { |
| int opcode; |
| opcode = *(int8_t *)src++; |
| if (opcode >= 0) { |
| int size = opcode + 1; |
| for (i = 0; i < size; i++) { |
| int length = FFMIN(size - i, width); |
| memcpy(dst + y*linesize + x * 4, src, length * 4); |
| src += length * 4; |
| x += length; |
| i += length; |
| if (x >= width) { |
| x = 0; |
| y += 1; |
| if (y >= height) |
| return; |
| } |
| } |
| } else { |
| int size = -opcode + 1; |
| uint32_t pixel = AV_RN32(src); |
| for (i = 0; i < size; i++) { |
| *(uint32_t *)(dst + y*linesize + x * 4) = pixel; |
| x += 1; |
| if (x >= width) { |
| x = 0; |
| y += 1; |
| if (y >= height) |
| return; |
| } |
| } |
| src += 4; |
| } |
| } |
| } |
| |
| /** |
| * Decode DEEP TVDC 32-bit buffer |
| * @param[out] dst Destination buffer |
| * @param[in] src Source buffer |
| * @param src_size Source buffer size (bytes) |
| * @param width Width of destination buffer (pixels) |
| * @param height Height of destination buffer (pixels) |
| * @param linesize Line size of destination buffer (bytes) |
| * @param[int] tvdc TVDC lookup table |
| */ |
| 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) |
| { |
| int x = 0, y = 0, plane = 0; |
| int8_t pixel = 0; |
| int i, j; |
| |
| for (i = 0; i < src_size * 2;) { |
| #define GETNIBBLE ((i & 1) ? (src[i>>1] & 0xF) : (src[i>>1] >> 4)) |
| int d = tvdc[GETNIBBLE]; |
| i++; |
| if (d) { |
| pixel += d; |
| dst[y * linesize + x*4 + plane] = pixel; |
| x++; |
| } else { |
| if (i >= src_size * 2) |
| return; |
| d = GETNIBBLE + 1; |
| i++; |
| d = FFMIN(d, width - x); |
| for (j = 0; j < d; j++) { |
| dst[y * linesize + x*4 + plane] = pixel; |
| x++; |
| } |
| } |
| if (x >= width) { |
| plane++; |
| if (plane >= 4) { |
| y++; |
| if (y >= height) |
| return; |
| plane = 0; |
| } |
| x = 0; |
| pixel = 0; |
| i = (i + 1) & ~1; |
| } |
| } |
| } |
| |
| static int unsupported(AVCodecContext *avctx) |
| { |
| IffContext *s = avctx->priv_data; |
| avpriv_request_sample(avctx, "bitmap (compression %i, bpp %i, ham %i)", s->compression, s->bpp, s->ham); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| static int decode_frame(AVCodecContext *avctx, |
| void *data, int *got_frame, |
| 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; |
| GetByteContext gb; |
| const AVPixFmtDescriptor *desc; |
| |
| if ((res = extract_header(avctx, avpkt)) < 0) |
| return res; |
| if ((res = ff_reget_buffer(avctx, s->frame)) < 0) |
| return res; |
| |
| desc = av_pix_fmt_desc_get(avctx->pix_fmt); |
| |
| if (!s->init && avctx->bits_per_coded_sample <= 8 && |
| avctx->pix_fmt == AV_PIX_FMT_PAL8) { |
| if ((res = cmap_read_palette(avctx, (uint32_t *)s->frame->data[1])) < 0) |
| return res; |
| } else if (!s->init && avctx->bits_per_coded_sample <= 8 && |
| avctx->pix_fmt == AV_PIX_FMT_RGB32) { |
| if ((res = cmap_read_palette(avctx, s->mask_palbuf)) < 0) |
| return res; |
| } |
| s->init = 1; |
| |
| switch (s->compression) { |
| case 0: |
| if (avctx->codec_tag == MKTAG('A', 'C', 'B', 'M')) { |
| if (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_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 AV_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 |
| return unsupported(avctx); |
| } else if (avctx->codec_tag == MKTAG('D', 'E', 'E', 'P')) { |
| int raw_width = avctx->width * (av_get_bits_per_pixel(desc) >> 3); |
| int x; |
| for (y = 0; y < avctx->height && buf < buf_end; y++) { |
| uint8_t *row = &s->frame->data[0][y * s->frame->linesize[0]]; |
| memcpy(row, buf, FFMIN(raw_width, buf_end - buf)); |
| buf += raw_width; |
| if (avctx->pix_fmt == AV_PIX_FMT_BGR32) { |
| for (x = 0; x < avctx->width; x++) |
| row[4 * x + 3] = row[4 * x + 3] & 0xF0 | (row[4 * x + 3] >> 4); |
| } |
| } |
| } else if (avctx->codec_tag == MKTAG('I', 'L', 'B', 'M')) { // interleaved |
| if (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_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 AV_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 { // AV_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->codec_tag == MKTAG('P', 'B', 'M', ' ')) { // IFF-PBM |
| if (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_PIX_FMT_GRAY8) { |
| for (y = 0; y < avctx->height && buf_end > buf; 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 if (s->ham) { // IFF-PBM: HAM to AV_PIX_FMT_BGR32 |
| for (y = 0; y < avctx->height && buf_end > buf; 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, s->planesize); |
| } |
| } else |
| return unsupported(avctx); |
| } |
| break; |
| case 1: |
| if (avctx->codec_tag == MKTAG('I', 'L', 'B', 'M')) { // interleaved |
| if (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_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 (avctx->bits_per_coded_sample <= 8) { //8-bit (+ mask) to AV_PIX_FMT_BGR32 |
| for (y = 0; y < avctx->height; y++) { |
| uint8_t *row = &s->frame->data[0][y * s->frame->linesize[0]]; |
| memset(s->mask_buf, 0, avctx->width * sizeof(uint32_t)); |
| for (plane = 0; plane < s->bpp; plane++) { |
| buf += decode_byterun(s->planebuf, s->planesize, buf, buf_end); |
| decodeplane32(s->mask_buf, s->planebuf, s->planesize, plane); |
| } |
| lookup_pal_indicies((uint32_t *)row, s->mask_buf, s->mask_palbuf, avctx->width); |
| } |
| } else if (s->ham) { // HAM to AV_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 { // AV_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->codec_tag == MKTAG('P', 'B', 'M', ' ')) { // IFF-PBM |
| if (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_PIX_FMT_GRAY8) { |
| 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 if (s->ham) { // IFF-PBM: HAM to AV_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, s->planesize); |
| } |
| } else |
| return unsupported(avctx); |
| } else if (avctx->codec_tag == MKTAG('D', 'E', 'E', 'P')) { // IFF-DEEP |
| if (av_get_bits_per_pixel(desc) == 32) |
| decode_deep_rle32(s->frame->data[0], buf, buf_size, avctx->width, avctx->height, s->frame->linesize[0]); |
| else |
| return unsupported(avctx); |
| } |
| break; |
| case 4: |
| bytestream2_init(&gb, buf, buf_size); |
| if (avctx->codec_tag == MKTAG('R', 'G', 'B', '8') && avctx->pix_fmt == AV_PIX_FMT_RGB32) |
| decode_rgb8(&gb, s->frame->data[0], avctx->width, avctx->height, s->frame->linesize[0]); |
| else if (avctx->codec_tag == MKTAG('R', 'G', 'B', 'N') && avctx->pix_fmt == AV_PIX_FMT_RGB444) |
| decode_rgbn(&gb, s->frame->data[0], avctx->width, avctx->height, s->frame->linesize[0]); |
| else |
| return unsupported(avctx); |
| break; |
| case 5: |
| if (avctx->codec_tag == MKTAG('D', 'E', 'E', 'P')) { |
| if (av_get_bits_per_pixel(desc) == 32) |
| decode_deep_tvdc32(s->frame->data[0], buf, buf_size, avctx->width, avctx->height, s->frame->linesize[0], s->tvdc); |
| else |
| return unsupported(avctx); |
| } else |
| return unsupported(avctx); |
| break; |
| default: |
| return unsupported(avctx); |
| } |
| |
| if ((res = av_frame_ref(data, s->frame)) < 0) |
| return res; |
| |
| *got_frame = 1; |
| |
| return buf_size; |
| } |
| |
| #if CONFIG_IFF_ILBM_DECODER |
| AVCodec ff_iff_ilbm_decoder = { |
| .name = "iff", |
| .long_name = NULL_IF_CONFIG_SMALL("IFF"), |
| .type = AVMEDIA_TYPE_VIDEO, |
| .id = AV_CODEC_ID_IFF_ILBM, |
| .priv_data_size = sizeof(IffContext), |
| .init = decode_init, |
| .close = decode_end, |
| .decode = decode_frame, |
| .capabilities = AV_CODEC_CAP_DR1, |
| }; |
| #endif |
