From 22e28216336da876e1fd17f380ce42eaf1446769 Mon Sep 17 00:00:00 2001 From: Tim Redfern Date: Mon, 17 Feb 2014 13:36:38 +0000 Subject: chasing indexing error --- ffmpeg/libavcodec/iff.c | 904 ------------------------------------------------ 1 file changed, 904 deletions(-) delete mode 100644 ffmpeg/libavcodec/iff.c (limited to 'ffmpeg/libavcodec/iff.c') diff --git a/ffmpeg/libavcodec/iff.c b/ffmpeg/libavcodec/iff.c deleted file mode 100644 index 4bde0a8..0000000 --- a/ffmpeg/libavcodec/iff.c +++ /dev/null @@ -1,904 +0,0 @@ -/* - * IFF ACBM/DEEP/ILBM/PBM bitmap decoder - * Copyright (c) 2010 Peter Ross - * Copyright (c) 2010 Sebastian Vater - * - * 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 - -#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_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 + 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) { - 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 = 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; - } - 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; - - 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; -} - -#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 = CODEC_CAP_DR1, -}; -#endif -#if CONFIG_IFF_BYTERUN1_DECODER -AVCodec ff_iff_byterun1_decoder = { - .name = "iff", - .long_name = NULL_IF_CONFIG_SMALL("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, -}; -#endif -- cgit v1.2.3