| 0,0 → 1,1281 |
|---|
| /* |
| * OpenEXR (.exr) image decoder |
| * Copyright (c) 2009 Jimmy Christensen |
| * |
| * 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 |
| * OpenEXR decoder |
| * @author Jimmy Christensen |
| * |
| * For more information on the OpenEXR format, visit: |
| * http://openexr.com/ |
| * |
| * exr_flt2uint() and exr_halflt2uint() is credited to Reimar Döffinger |
| */ |
| |
| #include <zlib.h> |
| |
| #include "get_bits.h" |
| #include "avcodec.h" |
| #include "bytestream.h" |
| #include "mathops.h" |
| #include "thread.h" |
| #include "libavutil/imgutils.h" |
| #include "libavutil/avassert.h" |
| |
| enum ExrCompr { |
| EXR_RAW = 0, |
| EXR_RLE = 1, |
| EXR_ZIP1 = 2, |
| EXR_ZIP16 = 3, |
| EXR_PIZ = 4, |
| EXR_PXR24 = 5, |
| EXR_B44 = 6, |
| EXR_B44A = 7, |
| }; |
| |
| enum ExrPixelType { |
| EXR_UINT, |
| EXR_HALF, |
| EXR_FLOAT |
| }; |
| |
| typedef struct EXRChannel { |
| int xsub, ysub; |
| enum ExrPixelType pixel_type; |
| } EXRChannel; |
| |
| typedef struct EXRThreadData { |
| uint8_t *uncompressed_data; |
| int uncompressed_size; |
| |
| uint8_t *tmp; |
| int tmp_size; |
| |
| uint8_t *bitmap; |
| uint16_t *lut; |
| } EXRThreadData; |
| |
| typedef struct EXRContext { |
| AVFrame *picture; |
| int compr; |
| enum ExrPixelType pixel_type; |
| int channel_offsets[4]; // 0 = red, 1 = green, 2 = blue and 3 = alpha |
| const AVPixFmtDescriptor *desc; |
| |
| uint32_t xmax, xmin; |
| uint32_t ymax, ymin; |
| uint32_t xdelta, ydelta; |
| |
| int ysize; |
| |
| uint64_t scan_line_size; |
| int scan_lines_per_block; |
| |
| const uint8_t *buf, *table; |
| int buf_size; |
| |
| EXRChannel *channels; |
| int nb_channels; |
| |
| EXRThreadData *thread_data; |
| int thread_data_size; |
| } EXRContext; |
| |
| /** |
| * Converts from 32-bit float as uint32_t to uint16_t |
| * |
| * @param v 32-bit float |
| * @return normalized 16-bit unsigned int |
| */ |
| static inline uint16_t exr_flt2uint(uint32_t v) |
| { |
| unsigned int exp = v >> 23; |
| // "HACK": negative values result in exp< 0, so clipping them to 0 |
| // is also handled by this condition, avoids explicit check for sign bit. |
| if (exp<= 127 + 7 - 24) // we would shift out all bits anyway |
| return 0; |
| if (exp >= 127) |
| return 0xffff; |
| v &= 0x007fffff; |
| return (v + (1 << 23)) >> (127 + 7 - exp); |
| } |
| |
| /** |
| * Converts from 16-bit float as uint16_t to uint16_t |
| * |
| * @param v 16-bit float |
| * @return normalized 16-bit unsigned int |
| */ |
| static inline uint16_t exr_halflt2uint(uint16_t v) |
| { |
| unsigned exp = 14 - (v >> 10); |
| if (exp >= 14) { |
| if (exp == 14) return (v >> 9) & 1; |
| else return (v & 0x8000) ? 0 : 0xffff; |
| } |
| v <<= 6; |
| return (v + (1 << 16)) >> (exp + 1); |
| } |
| |
| /** |
| * Gets the size of the header variable |
| * |
| * @param **buf the current pointer location in the header where |
| * the variable data starts |
| * @param *buf_end pointer location of the end of the buffer |
| * @return size of variable data |
| */ |
| static unsigned int get_header_variable_length(const uint8_t **buf, |
| const uint8_t *buf_end) |
| { |
| unsigned int variable_buffer_data_size = bytestream_get_le32(buf); |
| if (variable_buffer_data_size >= buf_end - *buf) |
| return 0; |
| return variable_buffer_data_size; |
| } |
| |
| /** |
| * Checks if the variable name corresponds with it's data type |
| * |
| * @param *avctx the AVCodecContext |
| * @param **buf the current pointer location in the header where |
| * the variable name starts |
| * @param *buf_end pointer location of the end of the buffer |
| * @param *value_name name of the varible to check |
| * @param *value_type type of the varible to check |
| * @param minimum_length minimum length of the variable data |
| * @param variable_buffer_data_size variable length read from the header |
| * after it's checked |
| * @return negative if variable is invalid |
| */ |
| static int check_header_variable(AVCodecContext *avctx, |
| const uint8_t **buf, |
| const uint8_t *buf_end, |
| const char *value_name, |
| const char *value_type, |
| unsigned int minimum_length, |
| unsigned int *variable_buffer_data_size) |
| { |
| if (buf_end - *buf >= minimum_length && !strcmp(*buf, value_name)) { |
| *buf += strlen(value_name)+1; |
| if (!strcmp(*buf, value_type)) { |
| *buf += strlen(value_type)+1; |
| *variable_buffer_data_size = get_header_variable_length(buf, buf_end); |
| if (!*variable_buffer_data_size) |
| av_log(avctx, AV_LOG_ERROR, "Incomplete header\n"); |
| return 1; |
| } |
| *buf -= strlen(value_name)+1; |
| av_log(avctx, AV_LOG_WARNING, "Unknown data type for header variable %s\n", value_name); |
| } |
| return -1; |
| } |
| |
| static void predictor(uint8_t *src, int size) |
| { |
| uint8_t *t = src + 1; |
| uint8_t *stop = src + size; |
| |
| while (t < stop) { |
| int d = (int)t[-1] + (int)t[0] - 128; |
| t[0] = d; |
| ++t; |
| } |
| } |
| |
| static void reorder_pixels(uint8_t *src, uint8_t *dst, int size) |
| { |
| const int8_t *t1 = src; |
| const int8_t *t2 = src + (size + 1) / 2; |
| int8_t *s = dst; |
| int8_t *stop = s + size; |
| |
| while (1) { |
| if (s < stop) |
| *(s++) = *(t1++); |
| else |
| break; |
| |
| if (s < stop) |
| *(s++) = *(t2++); |
| else |
| break; |
| } |
| } |
| |
| static int zip_uncompress(const uint8_t *src, int compressed_size, |
| int uncompressed_size, EXRThreadData *td) |
| { |
| unsigned long dest_len = uncompressed_size; |
| |
| if (uncompress(td->tmp, &dest_len, src, compressed_size) != Z_OK || |
| dest_len != uncompressed_size) |
| return AVERROR(EINVAL); |
| |
| predictor(td->tmp, uncompressed_size); |
| reorder_pixels(td->tmp, td->uncompressed_data, uncompressed_size); |
| |
| return 0; |
| } |
| |
| static int rle_uncompress(const uint8_t *src, int compressed_size, |
| int uncompressed_size, EXRThreadData *td) |
| { |
| int8_t *d = (int8_t *)td->tmp; |
| const int8_t *s = (const int8_t *)src; |
| int ssize = compressed_size; |
| int dsize = uncompressed_size; |
| int8_t *dend = d + dsize; |
| int count; |
| |
| while (ssize > 0) { |
| count = *s++; |
| |
| if (count < 0) { |
| count = -count; |
| |
| if ((dsize -= count ) < 0 || |
| (ssize -= count + 1) < 0) |
| return -1; |
| |
| while (count--) |
| *d++ = *s++; |
| } else { |
| count++; |
| |
| if ((dsize -= count) < 0 || |
| (ssize -= 2 ) < 0) |
| return -1; |
| |
| while (count--) |
| *d++ = *s; |
| |
| s++; |
| } |
| } |
| |
| if (dend != d) |
| return AVERROR_INVALIDDATA; |
| |
| predictor(td->tmp, uncompressed_size); |
| reorder_pixels(td->tmp, td->uncompressed_data, uncompressed_size); |
| |
| return 0; |
| } |
| |
| #define USHORT_RANGE (1 << 16) |
| #define BITMAP_SIZE (1 << 13) |
| |
| static uint16_t reverse_lut(const uint8_t *bitmap, uint16_t *lut) |
| { |
| int i, k = 0; |
| |
| for (i = 0; i < USHORT_RANGE; i++) { |
| if ((i == 0) || (bitmap[i >> 3] & (1 << (i & 7)))) |
| lut[k++] = i; |
| } |
| |
| i = k - 1; |
| |
| memset(lut + k, 0, (USHORT_RANGE - k) * 2); |
| |
| return i; |
| } |
| |
| static void apply_lut(const uint16_t *lut, uint16_t *dst, int dsize) |
| { |
| int i; |
| |
| for (i = 0; i < dsize; ++i) |
| dst[i] = lut[dst[i]]; |
| } |
| |
| #define HUF_ENCBITS 16 // literal (value) bit length |
| #define HUF_DECBITS 14 // decoding bit size (>= 8) |
| |
| #define HUF_ENCSIZE ((1 << HUF_ENCBITS) + 1) // encoding table size |
| #define HUF_DECSIZE (1 << HUF_DECBITS) // decoding table size |
| #define HUF_DECMASK (HUF_DECSIZE - 1) |
| |
| typedef struct HufDec { |
| int len; |
| int lit; |
| int *p; |
| } HufDec; |
| |
| static void huf_canonical_code_table(uint64_t *hcode) |
| { |
| uint64_t c, n[59] = { 0 }; |
| int i; |
| |
| for (i = 0; i < HUF_ENCSIZE; ++i) |
| n[hcode[i]] += 1; |
| |
| c = 0; |
| for (i = 58; i > 0; --i) { |
| uint64_t nc = ((c + n[i]) >> 1); |
| n[i] = c; |
| c = nc; |
| } |
| |
| for (i = 0; i < HUF_ENCSIZE; ++i) { |
| int l = hcode[i]; |
| |
| if (l > 0) |
| hcode[i] = l | (n[l]++ << 6); |
| } |
| } |
| |
| #define SHORT_ZEROCODE_RUN 59 |
| #define LONG_ZEROCODE_RUN 63 |
| #define SHORTEST_LONG_RUN (2 + LONG_ZEROCODE_RUN - SHORT_ZEROCODE_RUN) |
| #define LONGEST_LONG_RUN (255 + SHORTEST_LONG_RUN) |
| |
| static int huf_unpack_enc_table(GetByteContext *gb, |
| int32_t im, int32_t iM, uint64_t *hcode) |
| { |
| GetBitContext gbit; |
| |
| init_get_bits8(&gbit, gb->buffer, bytestream2_get_bytes_left(gb)); |
| |
| for (; im <= iM; im++) { |
| uint64_t l = hcode[im] = get_bits(&gbit, 6); |
| |
| if (l == LONG_ZEROCODE_RUN) { |
| int zerun = get_bits(&gbit, 8) + SHORTEST_LONG_RUN; |
| |
| if (im + zerun > iM + 1) |
| return AVERROR_INVALIDDATA; |
| |
| while (zerun--) |
| hcode[im++] = 0; |
| |
| im--; |
| } else if (l >= (uint64_t) SHORT_ZEROCODE_RUN) { |
| int zerun = l - SHORT_ZEROCODE_RUN + 2; |
| |
| if (im + zerun > iM + 1) |
| return AVERROR_INVALIDDATA; |
| |
| while (zerun--) |
| hcode[im++] = 0; |
| |
| im--; |
| } |
| } |
| |
| bytestream2_skip(gb, (get_bits_count(&gbit) + 7) / 8); |
| huf_canonical_code_table(hcode); |
| |
| return 0; |
| } |
| |
| static int huf_build_dec_table(const uint64_t *hcode, int im, |
| int iM, HufDec *hdecod) |
| { |
| for (; im <= iM; im++) { |
| uint64_t c = hcode[im] >> 6; |
| int i, l = hcode[im] & 63; |
| |
| if (c >> l) |
| return AVERROR_INVALIDDATA; |
| |
| if (l > HUF_DECBITS) { |
| HufDec *pl = hdecod + (c >> (l - HUF_DECBITS)); |
| if (pl->len) |
| return AVERROR_INVALIDDATA; |
| |
| pl->lit++; |
| |
| pl->p = av_realloc_f(pl->p, pl->lit, sizeof(int)); |
| if (!pl->p) |
| return AVERROR(ENOMEM); |
| |
| pl->p[pl->lit - 1] = im; |
| } else if (l) { |
| HufDec *pl = hdecod + (c << (HUF_DECBITS - l)); |
| |
| for (i = 1 << (HUF_DECBITS - l); i > 0; i--, pl++) { |
| if (pl->len || pl->p) |
| return AVERROR_INVALIDDATA; |
| pl->len = l; |
| pl->lit = im; |
| } |
| } |
| } |
| |
| return 0; |
| } |
| |
| #define get_char(c, lc, gb) { \ |
| c = (c << 8) | bytestream2_get_byte(gb); \ |
| lc += 8; \ |
| } |
| |
| #define get_code(po, rlc, c, lc, gb, out, oe) { \ |
| if (po == rlc) { \ |
| if (lc < 8) \ |
| get_char(c, lc, gb); \ |
| lc -= 8; \ |
| \ |
| cs = c >> lc; \ |
| \ |
| if (out + cs > oe) \ |
| return AVERROR_INVALIDDATA; \ |
| \ |
| s = out[-1]; \ |
| \ |
| while (cs-- > 0) \ |
| *out++ = s; \ |
| } else if (out < oe) { \ |
| *out++ = po; \ |
| } else { \ |
| return AVERROR_INVALIDDATA; \ |
| } \ |
| } |
| |
| static int huf_decode(const uint64_t *hcode, const HufDec *hdecod, |
| GetByteContext *gb, int nbits, |
| int rlc, int no, uint16_t *out) |
| { |
| uint64_t c = 0; |
| uint16_t *outb = out; |
| uint16_t *oe = out + no; |
| const uint8_t *ie = gb->buffer + (nbits + 7) / 8; // input byte size |
| uint8_t cs, s; |
| int i, lc = 0; |
| |
| while (gb->buffer < ie) { |
| get_char(c, lc, gb); |
| |
| while (lc >= HUF_DECBITS) { |
| const HufDec pl = hdecod[(c >> (lc-HUF_DECBITS)) & HUF_DECMASK]; |
| |
| if (pl.len) { |
| lc -= pl.len; |
| get_code(pl.lit, rlc, c, lc, gb, out, oe); |
| } else { |
| int j; |
| |
| if (!pl.p) |
| return AVERROR_INVALIDDATA; |
| |
| for (j = 0; j < pl.lit; j++) { |
| int l = hcode[pl.p[j]] & 63; |
| |
| while (lc < l && bytestream2_get_bytes_left(gb) > 0) |
| get_char(c, lc, gb); |
| |
| if (lc >= l) { |
| if ((hcode[pl.p[j]] >> 6) == |
| ((c >> (lc - l)) & ((1LL << l) - 1))) { |
| lc -= l; |
| get_code(pl.p[j], rlc, c, lc, gb, out, oe); |
| break; |
| } |
| } |
| } |
| |
| if (j == pl.lit) |
| return AVERROR_INVALIDDATA; |
| } |
| } |
| } |
| |
| i = (8 - nbits) & 7; |
| c >>= i; |
| lc -= i; |
| |
| while (lc > 0) { |
| const HufDec pl = hdecod[(c << (HUF_DECBITS - lc)) & HUF_DECMASK]; |
| |
| if (pl.len) { |
| lc -= pl.len; |
| get_code(pl.lit, rlc, c, lc, gb, out, oe); |
| } else { |
| return AVERROR_INVALIDDATA; |
| } |
| } |
| |
| if (out - outb != no) |
| return AVERROR_INVALIDDATA; |
| return 0; |
| } |
| |
| static int huf_uncompress(GetByteContext *gb, |
| uint16_t *dst, int dst_size) |
| { |
| int32_t src_size, im, iM; |
| uint32_t nBits; |
| uint64_t *freq; |
| HufDec *hdec; |
| int ret, i; |
| |
| src_size = bytestream2_get_le32(gb); |
| im = bytestream2_get_le32(gb); |
| iM = bytestream2_get_le32(gb); |
| bytestream2_skip(gb, 4); |
| nBits = bytestream2_get_le32(gb); |
| if (im < 0 || im >= HUF_ENCSIZE || |
| iM < 0 || iM >= HUF_ENCSIZE || |
| src_size < 0) |
| return AVERROR_INVALIDDATA; |
| |
| bytestream2_skip(gb, 4); |
| |
| freq = av_calloc(HUF_ENCSIZE, sizeof(*freq)); |
| hdec = av_calloc(HUF_DECSIZE, sizeof(*hdec)); |
| if (!freq || !hdec) { |
| ret = AVERROR(ENOMEM); |
| goto fail; |
| } |
| |
| if ((ret = huf_unpack_enc_table(gb, im, iM, freq)) < 0) |
| goto fail; |
| |
| if (nBits > 8 * bytestream2_get_bytes_left(gb)) { |
| ret = AVERROR_INVALIDDATA; |
| goto fail; |
| } |
| |
| if ((ret = huf_build_dec_table(freq, im, iM, hdec)) < 0) |
| goto fail; |
| ret = huf_decode(freq, hdec, gb, nBits, iM, dst_size, dst); |
| |
| fail: |
| for (i = 0; i < HUF_DECSIZE; i++) { |
| if (hdec) |
| av_freep(&hdec[i].p); |
| } |
| |
| av_free(freq); |
| av_free(hdec); |
| |
| return ret; |
| } |
| |
| static inline void wdec14(uint16_t l, uint16_t h, uint16_t *a, uint16_t *b) |
| { |
| int16_t ls = l; |
| int16_t hs = h; |
| int hi = hs; |
| int ai = ls + (hi & 1) + (hi >> 1); |
| int16_t as = ai; |
| int16_t bs = ai - hi; |
| |
| *a = as; |
| *b = bs; |
| } |
| |
| #define NBITS 16 |
| #define A_OFFSET (1 << (NBITS - 1)) |
| #define MOD_MASK ((1 << NBITS) - 1) |
| |
| static inline void wdec16(uint16_t l, uint16_t h, uint16_t *a, uint16_t *b) |
| { |
| int m = l; |
| int d = h; |
| int bb = (m - (d >> 1)) & MOD_MASK; |
| int aa = (d + bb - A_OFFSET) & MOD_MASK; |
| *b = bb; |
| *a = aa; |
| } |
| |
| static void wav_decode(uint16_t *in, int nx, int ox, |
| int ny, int oy, uint16_t mx) |
| { |
| int w14 = (mx < (1 << 14)); |
| int n = (nx > ny) ? ny: nx; |
| int p = 1; |
| int p2; |
| |
| while (p <= n) |
| p <<= 1; |
| |
| p >>= 1; |
| p2 = p; |
| p >>= 1; |
| |
| while (p >= 1) { |
| uint16_t *py = in; |
| uint16_t *ey = in + oy * (ny - p2); |
| uint16_t i00, i01, i10, i11; |
| int oy1 = oy * p; |
| int oy2 = oy * p2; |
| int ox1 = ox * p; |
| int ox2 = ox * p2; |
| |
| for (; py <= ey; py += oy2) { |
| uint16_t *px = py; |
| uint16_t *ex = py + ox * (nx - p2); |
| |
| for (; px <= ex; px += ox2) { |
| uint16_t *p01 = px + ox1; |
| uint16_t *p10 = px + oy1; |
| uint16_t *p11 = p10 + ox1; |
| |
| if (w14) { |
| wdec14(*px, *p10, &i00, &i10); |
| wdec14(*p01, *p11, &i01, &i11); |
| wdec14(i00, i01, px, p01); |
| wdec14(i10, i11, p10, p11); |
| } else { |
| wdec16(*px, *p10, &i00, &i10); |
| wdec16(*p01, *p11, &i01, &i11); |
| wdec16(i00, i01, px, p01); |
| wdec16(i10, i11, p10, p11); |
| } |
| } |
| |
| if (nx & p) { |
| uint16_t *p10 = px + oy1; |
| |
| if (w14) |
| wdec14(*px, *p10, &i00, p10); |
| else |
| wdec16(*px, *p10, &i00, p10); |
| |
| *px = i00; |
| } |
| } |
| |
| if (ny & p) { |
| uint16_t *px = py; |
| uint16_t *ex = py + ox * (nx - p2); |
| |
| for (; px <= ex; px += ox2) { |
| uint16_t *p01 = px + ox1; |
| |
| if (w14) |
| wdec14(*px, *p01, &i00, p01); |
| else |
| wdec16(*px, *p01, &i00, p01); |
| |
| *px = i00; |
| } |
| } |
| |
| p2 = p; |
| p >>= 1; |
| } |
| } |
| |
| static int piz_uncompress(EXRContext *s, const uint8_t *src, int ssize, int dsize, EXRThreadData *td) |
| { |
| GetByteContext gb; |
| uint16_t maxval, min_non_zero, max_non_zero; |
| uint16_t *ptr, *tmp = (uint16_t *)td->tmp; |
| int8_t *out; |
| int ret, i, j; |
| |
| if (!td->bitmap) |
| td->bitmap = av_malloc(BITMAP_SIZE); |
| if (!td->lut) |
| td->lut = av_malloc(1 << 17); |
| if (!td->bitmap || !td->lut) |
| return AVERROR(ENOMEM); |
| |
| bytestream2_init(&gb, src, ssize); |
| min_non_zero = bytestream2_get_le16(&gb); |
| max_non_zero = bytestream2_get_le16(&gb); |
| |
| if (max_non_zero >= BITMAP_SIZE) |
| return AVERROR_INVALIDDATA; |
| |
| memset(td->bitmap, 0, FFMIN(min_non_zero, BITMAP_SIZE)); |
| if (min_non_zero <= max_non_zero) |
| bytestream2_get_buffer(&gb, td->bitmap + min_non_zero, |
| max_non_zero - min_non_zero + 1); |
| memset(td->bitmap + max_non_zero, 0, BITMAP_SIZE - max_non_zero); |
| |
| maxval = reverse_lut(td->bitmap, td->lut); |
| |
| ret = huf_uncompress(&gb, tmp, dsize / sizeof(int16_t)); |
| if (ret) |
| return ret; |
| |
| ptr = tmp; |
| for (i = 0; i < s->nb_channels; i++) { |
| EXRChannel *channel = &s->channels[i]; |
| int size = channel->pixel_type; |
| |
| for (j = 0; j < size; j++) |
| wav_decode(ptr + j, s->xdelta, size, s->ysize, s->xdelta * size, maxval); |
| ptr += s->xdelta * s->ysize * size; |
| } |
| |
| apply_lut(td->lut, tmp, dsize / sizeof(int16_t)); |
| |
| out = td->uncompressed_data; |
| for (i = 0; i < s->ysize; i++) { |
| for (j = 0; j < s->nb_channels; j++) { |
| uint16_t *in = tmp + j * s->xdelta * s->ysize + i * s->xdelta; |
| memcpy(out, in, s->xdelta * 2); |
| out += s->xdelta * 2; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int pxr24_uncompress(EXRContext *s, const uint8_t *src, |
| int compressed_size, int uncompressed_size, |
| EXRThreadData *td) |
| { |
| unsigned long dest_len = uncompressed_size; |
| const uint8_t *in = td->tmp; |
| uint8_t *out; |
| int c, i, j; |
| |
| if (uncompress(td->tmp, &dest_len, src, compressed_size) != Z_OK || |
| dest_len != uncompressed_size) |
| return AVERROR(EINVAL); |
| |
| out = td->uncompressed_data; |
| for (i = 0; i < s->ysize; i++) { |
| for (c = 0; c < s->nb_channels; c++) { |
| EXRChannel *channel = &s->channels[c]; |
| const uint8_t *ptr[4]; |
| uint32_t pixel = 0; |
| |
| switch (channel->pixel_type) { |
| case EXR_FLOAT: |
| ptr[0] = in; |
| ptr[1] = ptr[0] + s->xdelta; |
| ptr[2] = ptr[1] + s->xdelta; |
| in = ptr[2] + s->xdelta; |
| |
| for (j = 0; j < s->xdelta; ++j) { |
| uint32_t diff = (*(ptr[0]++) << 24) | |
| (*(ptr[1]++) << 16) | |
| (*(ptr[2]++) << 8); |
| pixel += diff; |
| bytestream_put_le32(&out, pixel); |
| } |
| break; |
| case EXR_HALF: |
| ptr[0] = in; |
| ptr[1] = ptr[0] + s->xdelta; |
| in = ptr[1] + s->xdelta; |
| for (j = 0; j < s->xdelta; j++) { |
| uint32_t diff = (*(ptr[0]++) << 8) | *(ptr[1]++); |
| |
| pixel += diff; |
| bytestream_put_le16(&out, pixel); |
| } |
| break; |
| default: |
| av_assert1(0); |
| } |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int decode_block(AVCodecContext *avctx, void *tdata, |
| int jobnr, int threadnr) |
| { |
| EXRContext *s = avctx->priv_data; |
| AVFrame *const p = s->picture; |
| EXRThreadData *td = &s->thread_data[threadnr]; |
| const uint8_t *channel_buffer[4] = { 0 }; |
| const uint8_t *buf = s->buf; |
| uint64_t line_offset, uncompressed_size; |
| uint32_t xdelta = s->xdelta; |
| uint16_t *ptr_x; |
| uint8_t *ptr; |
| int32_t data_size, line; |
| const uint8_t *src; |
| int axmax = (avctx->width - (s->xmax + 1)) * 2 * s->desc->nb_components; |
| int bxmin = s->xmin * 2 * s->desc->nb_components; |
| int i, x, buf_size = s->buf_size; |
| int av_unused ret; |
| |
| line_offset = AV_RL64(s->table + jobnr * 8); |
| // Check if the buffer has the required bytes needed from the offset |
| if (line_offset > buf_size - 8) |
| return AVERROR_INVALIDDATA; |
| |
| src = buf + line_offset + 8; |
| line = AV_RL32(src - 8); |
| if (line < s->ymin || line > s->ymax) |
| return AVERROR_INVALIDDATA; |
| |
| data_size = AV_RL32(src - 4); |
| if (data_size <= 0 || data_size > buf_size) |
| return AVERROR_INVALIDDATA; |
| |
| s->ysize = FFMIN(s->scan_lines_per_block, s->ymax - line + 1); |
| uncompressed_size = s->scan_line_size * s->ysize; |
| if ((s->compr == EXR_RAW && (data_size != uncompressed_size || |
| line_offset > buf_size - uncompressed_size)) || |
| (s->compr != EXR_RAW && (data_size > uncompressed_size || |
| line_offset > buf_size - data_size))) { |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if (data_size < uncompressed_size) { |
| av_fast_padded_malloc(&td->uncompressed_data, &td->uncompressed_size, uncompressed_size); |
| av_fast_padded_malloc(&td->tmp, &td->tmp_size, uncompressed_size); |
| if (!td->uncompressed_data || !td->tmp) |
| return AVERROR(ENOMEM); |
| |
| switch (s->compr) { |
| case EXR_ZIP1: |
| case EXR_ZIP16: |
| ret = zip_uncompress(src, data_size, uncompressed_size, td); |
| break; |
| case EXR_PIZ: |
| ret = piz_uncompress(s, src, data_size, uncompressed_size, td); |
| break; |
| case EXR_PXR24: |
| ret = pxr24_uncompress(s, src, data_size, uncompressed_size, td); |
| break; |
| case EXR_RLE: |
| ret = rle_uncompress(src, data_size, uncompressed_size, td); |
| } |
| |
| src = td->uncompressed_data; |
| } |
| |
| channel_buffer[0] = src + xdelta * s->channel_offsets[0]; |
| channel_buffer[1] = src + xdelta * s->channel_offsets[1]; |
| channel_buffer[2] = src + xdelta * s->channel_offsets[2]; |
| if (s->channel_offsets[3] >= 0) |
| channel_buffer[3] = src + xdelta * s->channel_offsets[3]; |
| |
| ptr = p->data[0] + line * p->linesize[0]; |
| for (i = 0; i < s->scan_lines_per_block && line + i <= s->ymax; i++, ptr += p->linesize[0]) { |
| const uint8_t *r, *g, *b, *a; |
| |
| r = channel_buffer[0]; |
| g = channel_buffer[1]; |
| b = channel_buffer[2]; |
| if (channel_buffer[3]) |
| a = channel_buffer[3]; |
| |
| ptr_x = (uint16_t *)ptr; |
| |
| // Zero out the start if xmin is not 0 |
| memset(ptr_x, 0, bxmin); |
| ptr_x += s->xmin * s->desc->nb_components; |
| if (s->pixel_type == EXR_FLOAT) { |
| // 32-bit |
| for (x = 0; x < xdelta; x++) { |
| *ptr_x++ = exr_flt2uint(bytestream_get_le32(&r)); |
| *ptr_x++ = exr_flt2uint(bytestream_get_le32(&g)); |
| *ptr_x++ = exr_flt2uint(bytestream_get_le32(&b)); |
| if (channel_buffer[3]) |
| *ptr_x++ = exr_flt2uint(bytestream_get_le32(&a)); |
| } |
| } else { |
| // 16-bit |
| for (x = 0; x < xdelta; x++) { |
| *ptr_x++ = exr_halflt2uint(bytestream_get_le16(&r)); |
| *ptr_x++ = exr_halflt2uint(bytestream_get_le16(&g)); |
| *ptr_x++ = exr_halflt2uint(bytestream_get_le16(&b)); |
| if (channel_buffer[3]) |
| *ptr_x++ = exr_halflt2uint(bytestream_get_le16(&a)); |
| } |
| } |
| |
| // Zero out the end if xmax+1 is not w |
| memset(ptr_x, 0, axmax); |
| |
| channel_buffer[0] += s->scan_line_size; |
| channel_buffer[1] += s->scan_line_size; |
| channel_buffer[2] += s->scan_line_size; |
| if (channel_buffer[3]) |
| channel_buffer[3] += s->scan_line_size; |
| } |
| |
| return 0; |
| } |
| |
| static int decode_frame(AVCodecContext *avctx, |
| void *data, |
| int *got_frame, |
| AVPacket *avpkt) |
| { |
| const uint8_t *buf = avpkt->data; |
| unsigned int buf_size = avpkt->size; |
| const uint8_t *buf_end = buf + buf_size; |
| |
| EXRContext *const s = avctx->priv_data; |
| ThreadFrame frame = { .f = data }; |
| AVFrame *picture = data; |
| uint8_t *ptr; |
| |
| int i, y, magic_number, version, flags, ret; |
| int w = 0; |
| int h = 0; |
| |
| int out_line_size; |
| int scan_line_blocks; |
| |
| unsigned int current_channel_offset = 0; |
| |
| s->xmin = ~0; |
| s->xmax = ~0; |
| s->ymin = ~0; |
| s->ymax = ~0; |
| s->xdelta = ~0; |
| s->ydelta = ~0; |
| s->channel_offsets[0] = -1; |
| s->channel_offsets[1] = -1; |
| s->channel_offsets[2] = -1; |
| s->channel_offsets[3] = -1; |
| s->pixel_type = -1; |
| s->nb_channels = 0; |
| s->compr = -1; |
| s->buf = buf; |
| s->buf_size = buf_size; |
| |
| if (buf_size < 10) { |
| av_log(avctx, AV_LOG_ERROR, "Too short header to parse\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| magic_number = bytestream_get_le32(&buf); |
| if (magic_number != 20000630) { // As per documentation of OpenEXR it's supposed to be int 20000630 little-endian |
| av_log(avctx, AV_LOG_ERROR, "Wrong magic number %d\n", magic_number); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| version = bytestream_get_byte(&buf); |
| if (version != 2) { |
| avpriv_report_missing_feature(avctx, "Version %d", version); |
| return AVERROR_PATCHWELCOME; |
| } |
| |
| flags = bytestream_get_le24(&buf); |
| if (flags & 0x2) { |
| avpriv_report_missing_feature(avctx, "Tile support"); |
| return AVERROR_PATCHWELCOME; |
| } |
| |
| // Parse the header |
| while (buf < buf_end && buf[0]) { |
| unsigned int variable_buffer_data_size; |
| // Process the channel list |
| if (check_header_variable(avctx, &buf, buf_end, "channels", "chlist", 38, &variable_buffer_data_size) >= 0) { |
| const uint8_t *channel_list_end; |
| if (!variable_buffer_data_size) |
| return AVERROR_INVALIDDATA; |
| |
| channel_list_end = buf + variable_buffer_data_size; |
| while (channel_list_end - buf >= 19) { |
| EXRChannel *channel; |
| enum ExrPixelType current_pixel_type; |
| int channel_index = -1; |
| int xsub, ysub; |
| |
| if (!strcmp(buf, "R")) |
| channel_index = 0; |
| else if (!strcmp(buf, "G")) |
| channel_index = 1; |
| else if (!strcmp(buf, "B")) |
| channel_index = 2; |
| else if (!strcmp(buf, "A")) |
| channel_index = 3; |
| else |
| av_log(avctx, AV_LOG_WARNING, "Unsupported channel %.256s\n", buf); |
| |
| while (bytestream_get_byte(&buf) && buf < channel_list_end) |
| continue; /* skip */ |
| |
| if (channel_list_end - * &buf < 4) { |
| av_log(avctx, AV_LOG_ERROR, "Incomplete header\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| current_pixel_type = bytestream_get_le32(&buf); |
| if (current_pixel_type > 2) { |
| av_log(avctx, AV_LOG_ERROR, "Unknown pixel type\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| buf += 4; |
| xsub = bytestream_get_le32(&buf); |
| ysub = bytestream_get_le32(&buf); |
| if (xsub != 1 || ysub != 1) { |
| avpriv_report_missing_feature(avctx, "Subsampling %dx%d", xsub, ysub); |
| return AVERROR_PATCHWELCOME; |
| } |
| |
| if (channel_index >= 0) { |
| if (s->pixel_type != -1 && s->pixel_type != current_pixel_type) { |
| av_log(avctx, AV_LOG_ERROR, "RGB channels not of the same depth\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| s->pixel_type = current_pixel_type; |
| s->channel_offsets[channel_index] = current_channel_offset; |
| } |
| |
| s->channels = av_realloc_f(s->channels, ++s->nb_channels, sizeof(EXRChannel)); |
| if (!s->channels) |
| return AVERROR(ENOMEM); |
| channel = &s->channels[s->nb_channels - 1]; |
| channel->pixel_type = current_pixel_type; |
| channel->xsub = xsub; |
| channel->ysub = ysub; |
| |
| current_channel_offset += 1 << current_pixel_type; |
| } |
| |
| /* Check if all channels are set with an offset or if the channels |
| * are causing an overflow */ |
| |
| if (FFMIN3(s->channel_offsets[0], |
| s->channel_offsets[1], |
| s->channel_offsets[2]) < 0) { |
| if (s->channel_offsets[0] < 0) |
| av_log(avctx, AV_LOG_ERROR, "Missing red channel\n"); |
| if (s->channel_offsets[1] < 0) |
| av_log(avctx, AV_LOG_ERROR, "Missing green channel\n"); |
| if (s->channel_offsets[2] < 0) |
| av_log(avctx, AV_LOG_ERROR, "Missing blue channel\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| buf = channel_list_end; |
| continue; |
| } else if (check_header_variable(avctx, &buf, buf_end, "dataWindow", "box2i", 31, &variable_buffer_data_size) >= 0) { |
| if (!variable_buffer_data_size) |
| return AVERROR_INVALIDDATA; |
| |
| s->xmin = AV_RL32(buf); |
| s->ymin = AV_RL32(buf + 4); |
| s->xmax = AV_RL32(buf + 8); |
| s->ymax = AV_RL32(buf + 12); |
| s->xdelta = (s->xmax - s->xmin) + 1; |
| s->ydelta = (s->ymax - s->ymin) + 1; |
| |
| buf += variable_buffer_data_size; |
| continue; |
| } else if (check_header_variable(avctx, &buf, buf_end, "displayWindow", "box2i", 34, &variable_buffer_data_size) >= 0) { |
| if (!variable_buffer_data_size) |
| return AVERROR_INVALIDDATA; |
| |
| w = AV_RL32(buf + 8) + 1; |
| h = AV_RL32(buf + 12) + 1; |
| |
| buf += variable_buffer_data_size; |
| continue; |
| } else if (check_header_variable(avctx, &buf, buf_end, "lineOrder", "lineOrder", 25, &variable_buffer_data_size) >= 0) { |
| if (!variable_buffer_data_size) |
| return AVERROR_INVALIDDATA; |
| |
| av_log(avctx, AV_LOG_DEBUG, "line order : %d\n", *buf); |
| if (*buf > 2) { |
| av_log(avctx, AV_LOG_ERROR, "Unknown line order\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| buf += variable_buffer_data_size; |
| continue; |
| } else if (check_header_variable(avctx, &buf, buf_end, "pixelAspectRatio", "float", 31, &variable_buffer_data_size) >= 0) { |
| if (!variable_buffer_data_size) |
| return AVERROR_INVALIDDATA; |
| |
| avctx->sample_aspect_ratio = av_d2q(av_int2float(AV_RL32(buf)), 255); |
| |
| buf += variable_buffer_data_size; |
| continue; |
| } else if (check_header_variable(avctx, &buf, buf_end, "compression", "compression", 29, &variable_buffer_data_size) >= 0) { |
| if (!variable_buffer_data_size) |
| return AVERROR_INVALIDDATA; |
| |
| if (s->compr == -1) |
| s->compr = *buf; |
| else |
| av_log(avctx, AV_LOG_WARNING, "Found more than one compression attribute\n"); |
| |
| buf += variable_buffer_data_size; |
| continue; |
| } |
| |
| // Check if there is enough bytes for a header |
| if (buf_end - buf <= 9) { |
| av_log(avctx, AV_LOG_ERROR, "Incomplete header\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| // Process unknown variables |
| for (i = 0; i < 2; i++) { |
| // Skip variable name/type |
| while (++buf < buf_end) |
| if (buf[0] == 0x0) |
| break; |
| } |
| buf++; |
| // Skip variable length |
| if (buf_end - buf >= 5) { |
| variable_buffer_data_size = get_header_variable_length(&buf, buf_end); |
| if (!variable_buffer_data_size) { |
| av_log(avctx, AV_LOG_ERROR, "Incomplete header\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| buf += variable_buffer_data_size; |
| } |
| } |
| |
| if (s->compr == -1) { |
| av_log(avctx, AV_LOG_ERROR, "Missing compression attribute\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if (buf >= buf_end) { |
| av_log(avctx, AV_LOG_ERROR, "Incomplete frame\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| buf++; |
| |
| switch (s->pixel_type) { |
| case EXR_FLOAT: |
| case EXR_HALF: |
| if (s->channel_offsets[3] >= 0) |
| avctx->pix_fmt = AV_PIX_FMT_RGBA64; |
| else |
| avctx->pix_fmt = AV_PIX_FMT_RGB48; |
| break; |
| case EXR_UINT: |
| avpriv_request_sample(avctx, "32-bit unsigned int"); |
| return AVERROR_PATCHWELCOME; |
| default: |
| av_log(avctx, AV_LOG_ERROR, "Missing channel list\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| switch (s->compr) { |
| case EXR_RAW: |
| case EXR_RLE: |
| case EXR_ZIP1: |
| s->scan_lines_per_block = 1; |
| break; |
| case EXR_PXR24: |
| case EXR_ZIP16: |
| s->scan_lines_per_block = 16; |
| break; |
| case EXR_PIZ: |
| s->scan_lines_per_block = 32; |
| break; |
| default: |
| avpriv_report_missing_feature(avctx, "Compression %d", s->compr); |
| return AVERROR_PATCHWELCOME; |
| } |
| |
| if (av_image_check_size(w, h, 0, avctx)) |
| return AVERROR_INVALIDDATA; |
| |
| // Verify the xmin, xmax, ymin, ymax and xdelta before setting the actual image size |
| if (s->xmin > s->xmax || |
| s->ymin > s->ymax || |
| s->xdelta != s->xmax - s->xmin + 1 || |
| s->xmax >= w || s->ymax >= h) { |
| av_log(avctx, AV_LOG_ERROR, "Wrong sizing or missing size information\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if (w != avctx->width || h != avctx->height) { |
| avcodec_set_dimensions(avctx, w, h); |
| } |
| |
| s->desc = av_pix_fmt_desc_get(avctx->pix_fmt); |
| out_line_size = avctx->width * 2 * s->desc->nb_components; |
| s->scan_line_size = s->xdelta * current_channel_offset; |
| scan_line_blocks = (s->ydelta + s->scan_lines_per_block - 1) / s->scan_lines_per_block; |
| |
| if (s->compr != EXR_RAW) { |
| size_t thread_data_size, prev_size; |
| EXRThreadData *m; |
| |
| prev_size = s->thread_data_size; |
| if (av_size_mult(avctx->thread_count, sizeof(EXRThreadData), &thread_data_size)) |
| return AVERROR(EINVAL); |
| |
| m = av_fast_realloc(s->thread_data, &s->thread_data_size, thread_data_size); |
| if (!m) |
| return AVERROR(ENOMEM); |
| s->thread_data = m; |
| memset(s->thread_data + prev_size, 0, s->thread_data_size - prev_size); |
| } |
| |
| if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0) |
| return ret; |
| |
| if (buf_end - buf < scan_line_blocks * 8) |
| return AVERROR_INVALIDDATA; |
| s->table = buf; |
| ptr = picture->data[0]; |
| |
| // Zero out the start if ymin is not 0 |
| for (y = 0; y < s->ymin; y++) { |
| memset(ptr, 0, out_line_size); |
| ptr += picture->linesize[0]; |
| } |
| |
| s->picture = picture; |
| avctx->execute2(avctx, decode_block, s->thread_data, NULL, scan_line_blocks); |
| |
| // Zero out the end if ymax+1 is not h |
| for (y = s->ymax + 1; y < avctx->height; y++) { |
| memset(ptr, 0, out_line_size); |
| ptr += picture->linesize[0]; |
| } |
| |
| picture->pict_type = AV_PICTURE_TYPE_I; |
| *got_frame = 1; |
| |
| return buf_size; |
| } |
| |
| static av_cold int decode_end(AVCodecContext *avctx) |
| { |
| EXRContext *s = avctx->priv_data; |
| int i; |
| |
| for (i = 0; i < s->thread_data_size / sizeof(EXRThreadData); i++) { |
| EXRThreadData *td = &s->thread_data[i]; |
| av_freep(&td->uncompressed_data); |
| av_freep(&td->tmp); |
| av_freep(&td->bitmap); |
| av_freep(&td->lut); |
| } |
| |
| av_freep(&s->thread_data); |
| s->thread_data_size = 0; |
| av_freep(&s->channels); |
| |
| return 0; |
| } |
| |
| AVCodec ff_exr_decoder = { |
| .name = "exr", |
| .long_name = NULL_IF_CONFIG_SMALL("OpenEXR image"), |
| .type = AVMEDIA_TYPE_VIDEO, |
| .id = AV_CODEC_ID_EXR, |
| .priv_data_size = sizeof(EXRContext), |
| .close = decode_end, |
| .decode = decode_frame, |
| .capabilities = CODEC_CAP_DR1 | CODEC_CAP_FRAME_THREADS | CODEC_CAP_SLICE_THREADS, |
| }; |