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Diffstat (limited to 'ffmpeg1/libavcodec/iff.c')
| -rw-r--r-- | ffmpeg1/libavcodec/iff.c | 896 |
1 files changed, 896 insertions, 0 deletions
diff --git a/ffmpeg1/libavcodec/iff.c b/ffmpeg1/libavcodec/iff.c new file mode 100644 index 0000000..716a731 --- /dev/null +++ b/ffmpeg1/libavcodec/iff.c @@ -0,0 +1,896 @@ +/* + * 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 "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 { + 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) + FF_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) + FF_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) + FF_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) + FF_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_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 + FF_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) + 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 = value + 1; + memcpy(dst + x, buf, FFMIN3(length, dst_size - x, buf_end - buf)); + buf += length; + } else if (value > -128) { + length = -value + 1; + memset(dst + x, *buf++, FFMIN(length, dst_size - x)); + } else { // noop + continue; + } + x += length; + } + 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; + + if ((res = extract_header(avctx, avpkt)) < 0) + return res; + if ((res = ff_reget_buffer(avctx, s->frame)) < 0) + return res; + 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')) { + const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt); + 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 + const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt); + 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')) + 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')) + 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')) { + const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt); + 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; +} + +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; +} + +#if CONFIG_IFF_ILBM_DECODER +AVCodec ff_iff_ilbm_decoder = { + .name = "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 = CODEC_CAP_DR1, + .long_name = NULL_IF_CONFIG_SMALL("IFF"), +}; +#endif +#if CONFIG_IFF_BYTERUN1_DECODER +AVCodec ff_iff_byterun1_decoder = { + .name = "iff", + .type = AVMEDIA_TYPE_VIDEO, + .id = AV_CODEC_ID_IFF_BYTERUN1, + .priv_data_size = sizeof(IffContext), + .init = decode_init, + .close = decode_end, + .decode = decode_frame, + .capabilities = CODEC_CAP_DR1, + .long_name = NULL_IF_CONFIG_SMALL("IFF"), +}; +#endif |