2 * IFF ACBM/DEEP/ILBM/PBM bitmap decoder
3 * Copyright (c) 2010 Peter Ross <pross@xvid.org>
4 * Copyright (c) 2010 Sebastian Vater <cdgs.basty@googlemail.com>
6 * This file is part of FFmpeg.
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
25 * IFF ACBM/DEEP/ILBM/PBM bitmap decoder
28 #include "libavutil/imgutils.h"
29 #include "bytestream.h"
38 MASK_HAS_TRANSPARENT_COLOR,
46 uint8_t * ham_buf; ///< temporary buffer for planar to chunky conversation
47 uint32_t *ham_palbuf; ///< HAM decode table
48 uint32_t *mask_buf; ///< temporary buffer for palette indices
49 uint32_t *mask_palbuf; ///< masking palette table
50 unsigned compression; ///< delta compression method used
51 unsigned bpp; ///< bits per plane to decode (differs from bits_per_coded_sample if HAM)
52 unsigned ham; ///< 0 if non-HAM or number of hold bits (6 for bpp > 6, 4 otherwise)
53 unsigned flags; ///< 1 for EHB, 0 is no extra half darkening
54 unsigned transparency; ///< TODO: transparency color index in palette
55 unsigned masking; ///< TODO: masking method used
56 int init; // 1 if buffer and palette data already initialized, 0 otherwise
57 int16_t tvdc[16]; ///< TVDC lookup table
60 #define LUT8_PART(plane, v) \
61 AV_LE2NE64C(UINT64_C(0x0000000)<<32 | v) << plane, \
62 AV_LE2NE64C(UINT64_C(0x1000000)<<32 | v) << plane, \
63 AV_LE2NE64C(UINT64_C(0x0010000)<<32 | v) << plane, \
64 AV_LE2NE64C(UINT64_C(0x1010000)<<32 | v) << plane, \
65 AV_LE2NE64C(UINT64_C(0x0000100)<<32 | v) << plane, \
66 AV_LE2NE64C(UINT64_C(0x1000100)<<32 | v) << plane, \
67 AV_LE2NE64C(UINT64_C(0x0010100)<<32 | v) << plane, \
68 AV_LE2NE64C(UINT64_C(0x1010100)<<32 | v) << plane, \
69 AV_LE2NE64C(UINT64_C(0x0000001)<<32 | v) << plane, \
70 AV_LE2NE64C(UINT64_C(0x1000001)<<32 | v) << plane, \
71 AV_LE2NE64C(UINT64_C(0x0010001)<<32 | v) << plane, \
72 AV_LE2NE64C(UINT64_C(0x1010001)<<32 | v) << plane, \
73 AV_LE2NE64C(UINT64_C(0x0000101)<<32 | v) << plane, \
74 AV_LE2NE64C(UINT64_C(0x1000101)<<32 | v) << plane, \
75 AV_LE2NE64C(UINT64_C(0x0010101)<<32 | v) << plane, \
76 AV_LE2NE64C(UINT64_C(0x1010101)<<32 | v) << plane
78 #define LUT8(plane) { \
79 LUT8_PART(plane, 0x0000000), \
80 LUT8_PART(plane, 0x1000000), \
81 LUT8_PART(plane, 0x0010000), \
82 LUT8_PART(plane, 0x1010000), \
83 LUT8_PART(plane, 0x0000100), \
84 LUT8_PART(plane, 0x1000100), \
85 LUT8_PART(plane, 0x0010100), \
86 LUT8_PART(plane, 0x1010100), \
87 LUT8_PART(plane, 0x0000001), \
88 LUT8_PART(plane, 0x1000001), \
89 LUT8_PART(plane, 0x0010001), \
90 LUT8_PART(plane, 0x1010001), \
91 LUT8_PART(plane, 0x0000101), \
92 LUT8_PART(plane, 0x1000101), \
93 LUT8_PART(plane, 0x0010101), \
94 LUT8_PART(plane, 0x1010101), \
97 // 8 planes * 8-bit mask
98 static const uint64_t plane8_lut[8][256] = {
99 LUT8(0), LUT8(1), LUT8(2), LUT8(3),
100 LUT8(4), LUT8(5), LUT8(6), LUT8(7),
103 #define LUT32(plane) { \
105 0, 0, 0, 1 << plane, \
106 0, 0, 1 << plane, 0, \
107 0, 0, 1 << plane, 1 << plane, \
108 0, 1 << plane, 0, 0, \
109 0, 1 << plane, 0, 1 << plane, \
110 0, 1 << plane, 1 << plane, 0, \
111 0, 1 << plane, 1 << plane, 1 << plane, \
112 1 << plane, 0, 0, 0, \
113 1 << plane, 0, 0, 1 << plane, \
114 1 << plane, 0, 1 << plane, 0, \
115 1 << plane, 0, 1 << plane, 1 << plane, \
116 1 << plane, 1 << plane, 0, 0, \
117 1 << plane, 1 << plane, 0, 1 << plane, \
118 1 << plane, 1 << plane, 1 << plane, 0, \
119 1 << plane, 1 << plane, 1 << plane, 1 << plane, \
122 // 32 planes * 4-bit mask * 4 lookup tables each
123 static const uint32_t plane32_lut[32][16*4] = {
124 LUT32( 0), LUT32( 1), LUT32( 2), LUT32( 3),
125 LUT32( 4), LUT32( 5), LUT32( 6), LUT32( 7),
126 LUT32( 8), LUT32( 9), LUT32(10), LUT32(11),
127 LUT32(12), LUT32(13), LUT32(14), LUT32(15),
128 LUT32(16), LUT32(17), LUT32(18), LUT32(19),
129 LUT32(20), LUT32(21), LUT32(22), LUT32(23),
130 LUT32(24), LUT32(25), LUT32(26), LUT32(27),
131 LUT32(28), LUT32(29), LUT32(30), LUT32(31),
134 // Gray to RGB, required for palette table of grayscale images with bpp < 8
135 static av_always_inline uint32_t gray2rgb(const uint32_t x) {
136 return x << 16 | x << 8 | x;
140 * Convert CMAP buffer (stored in extradata) to lavc palette format
142 static int cmap_read_palette(AVCodecContext *avctx, uint32_t *pal)
144 IffContext *s = avctx->priv_data;
146 const uint8_t *const palette = avctx->extradata + AV_RB16(avctx->extradata);
147 int palette_size = avctx->extradata_size - AV_RB16(avctx->extradata);
149 if (avctx->bits_per_coded_sample > 8) {
150 av_log(avctx, AV_LOG_ERROR, "bits_per_coded_sample > 8 not supported\n");
151 return AVERROR_INVALIDDATA;
154 count = 1 << avctx->bits_per_coded_sample;
155 // If extradata is smaller than actually needed, fill the remaining with black.
156 count = FFMIN(palette_size / 3, count);
158 for (i=0; i < count; i++) {
159 pal[i] = 0xFF000000 | AV_RB24(palette + i*3);
161 if (s->flags && count >= 32) { // EHB
162 for (i = 0; i < 32; i++)
163 pal[i + 32] = 0xFF000000 | (AV_RB24(palette + i*3) & 0xFEFEFE) >> 1;
164 count = FFMAX(count, 64);
166 } else { // Create gray-scale color palette for bps < 8
167 count = 1 << avctx->bits_per_coded_sample;
169 for (i=0; i < count; i++) {
170 pal[i] = 0xFF000000 | gray2rgb((i * 255) >> avctx->bits_per_coded_sample);
173 if (s->masking == MASK_HAS_MASK) {
174 memcpy(pal + (1 << avctx->bits_per_coded_sample), pal, count * 4);
175 for (i = 0; i < count; i++)
177 } else if (s->masking == MASK_HAS_TRANSPARENT_COLOR &&
178 s->transparency < 1 << avctx->bits_per_coded_sample)
179 pal[s->transparency] &= 0xFFFFFF;
184 * Extracts the IFF extra context and updates internal
185 * decoder structures.
187 * @param avctx the AVCodecContext where to extract extra context to
188 * @param avpkt the AVPacket to extract extra context from or NULL to use avctx
189 * @return 0 in case of success, a negative error code otherwise
191 static int extract_header(AVCodecContext *const avctx,
192 const AVPacket *const avpkt) {
195 IffContext *s = avctx->priv_data;
198 if (avctx->extradata_size < 2) {
199 av_log(avctx, AV_LOG_ERROR, "not enough extradata\n");
200 return AVERROR_INVALIDDATA;
202 palette_size = avctx->extradata_size - AV_RB16(avctx->extradata);
207 return AVERROR_INVALIDDATA;
208 image_size = avpkt->size - AV_RB16(avpkt->data);
210 buf_size = bytestream_get_be16(&buf);
211 if (buf_size <= 1 || image_size <= 1) {
212 av_log(avctx, AV_LOG_ERROR,
213 "Invalid image size received: %u -> image data offset: %d\n",
214 buf_size, image_size);
215 return AVERROR_INVALIDDATA;
218 buf = avctx->extradata;
219 buf_size = bytestream_get_be16(&buf);
220 if (buf_size <= 1 || palette_size < 0) {
221 av_log(avctx, AV_LOG_ERROR,
222 "Invalid palette size received: %u -> palette data offset: %d\n",
223 buf_size, palette_size);
224 return AVERROR_INVALIDDATA;
228 if (buf_size >= 41) {
229 s->compression = bytestream_get_byte(&buf);
230 s->bpp = bytestream_get_byte(&buf);
231 s->ham = bytestream_get_byte(&buf);
232 s->flags = bytestream_get_byte(&buf);
233 s->transparency = bytestream_get_be16(&buf);
234 s->masking = bytestream_get_byte(&buf);
235 for (i = 0; i < 16; i++)
236 s->tvdc[i] = bytestream_get_be16(&buf);
238 if (s->masking == MASK_HAS_MASK) {
239 if (s->bpp >= 8 && !s->ham) {
240 avctx->pix_fmt = AV_PIX_FMT_RGB32;
241 av_freep(&s->mask_buf);
242 av_freep(&s->mask_palbuf);
243 s->mask_buf = av_malloc((s->planesize * 32) + FF_INPUT_BUFFER_PADDING_SIZE);
245 return AVERROR(ENOMEM);
247 av_log(avctx, AV_LOG_ERROR, "bpp %d too large for palette\n", s->bpp);
248 av_freep(&s->mask_buf);
249 return AVERROR(ENOMEM);
251 s->mask_palbuf = av_malloc((2 << s->bpp) * sizeof(uint32_t) + FF_INPUT_BUFFER_PADDING_SIZE);
252 if (!s->mask_palbuf) {
253 av_freep(&s->mask_buf);
254 return AVERROR(ENOMEM);
258 } else if (s->masking != MASK_NONE && s->masking != MASK_HAS_TRANSPARENT_COLOR) {
259 av_log(avctx, AV_LOG_ERROR, "Masking not supported\n");
260 return AVERROR_PATCHWELCOME;
262 if (!s->bpp || s->bpp > 32) {
263 av_log(avctx, AV_LOG_ERROR, "Invalid number of bitplanes: %u\n", s->bpp);
264 return AVERROR_INVALIDDATA;
265 } else if (s->ham >= 8) {
266 av_log(avctx, AV_LOG_ERROR, "Invalid number of hold bits for HAM: %u\n", s->ham);
267 return AVERROR_INVALIDDATA;
270 av_freep(&s->ham_buf);
271 av_freep(&s->ham_palbuf);
274 int i, count = FFMIN(palette_size / 3, 1 << s->ham);
276 const uint8_t *const palette = avctx->extradata + AV_RB16(avctx->extradata);
278 s->ham_buf = av_malloc((s->planesize * 8) + FF_INPUT_BUFFER_PADDING_SIZE);
280 return AVERROR(ENOMEM);
282 ham_count = 8 * (1 << s->ham);
283 s->ham_palbuf = av_malloc((ham_count << !!(s->masking == MASK_HAS_MASK)) * sizeof (uint32_t) + FF_INPUT_BUFFER_PADDING_SIZE);
284 if (!s->ham_palbuf) {
285 av_freep(&s->ham_buf);
286 return AVERROR(ENOMEM);
289 if (count) { // HAM with color palette attached
290 // prefill with black and palette and set HAM take direct value mask to zero
291 memset(s->ham_palbuf, 0, (1 << s->ham) * 2 * sizeof (uint32_t));
292 for (i=0; i < count; i++) {
293 s->ham_palbuf[i*2+1] = 0xFF000000 | AV_RL24(palette + i*3);
296 } else { // HAM with grayscale color palette
298 for (i=0; i < count; i++) {
299 s->ham_palbuf[i*2] = 0xFF000000; // take direct color value from palette
300 s->ham_palbuf[i*2+1] = 0xFF000000 | av_le2ne32(gray2rgb((i * 255) >> s->ham));
303 for (i=0; i < count; i++) {
304 uint32_t tmp = i << (8 - s->ham);
305 tmp |= tmp >> s->ham;
306 s->ham_palbuf[(i+count)*2] = 0xFF00FFFF; // just modify blue color component
307 s->ham_palbuf[(i+count*2)*2] = 0xFFFFFF00; // just modify red color component
308 s->ham_palbuf[(i+count*3)*2] = 0xFFFF00FF; // just modify green color component
309 s->ham_palbuf[(i+count)*2+1] = 0xFF000000 | tmp << 16;
310 s->ham_palbuf[(i+count*2)*2+1] = 0xFF000000 | tmp;
311 s->ham_palbuf[(i+count*3)*2+1] = 0xFF000000 | tmp << 8;
313 if (s->masking == MASK_HAS_MASK) {
314 for (i = 0; i < ham_count; i++)
315 s->ham_palbuf[(1 << s->bpp) + i] = s->ham_palbuf[i] | 0xFF000000;
323 static av_cold int decode_init(AVCodecContext *avctx)
325 IffContext *s = avctx->priv_data;
328 if (avctx->bits_per_coded_sample <= 8) {
331 if (avctx->extradata_size >= 2)
332 palette_size = avctx->extradata_size - AV_RB16(avctx->extradata);
335 avctx->pix_fmt = (avctx->bits_per_coded_sample < 8) ||
336 (avctx->extradata_size >= 2 && palette_size) ? AV_PIX_FMT_PAL8 : AV_PIX_FMT_GRAY8;
337 } else if (avctx->bits_per_coded_sample <= 32) {
338 if (avctx->codec_tag == MKTAG('R','G','B','8')) {
339 avctx->pix_fmt = AV_PIX_FMT_RGB32;
340 } else if (avctx->codec_tag == MKTAG('R','G','B','N')) {
341 avctx->pix_fmt = AV_PIX_FMT_RGB444;
342 } else if (avctx->codec_tag != MKTAG('D','E','E','P')) {
343 if (avctx->bits_per_coded_sample == 24) {
344 avctx->pix_fmt = AV_PIX_FMT_0BGR32;
345 } else if (avctx->bits_per_coded_sample == 32) {
346 avctx->pix_fmt = AV_PIX_FMT_BGR32;
348 av_log_ask_for_sample(avctx, "unknown bits_per_coded_sample\n");
349 return AVERROR_PATCHWELCOME;
353 return AVERROR_INVALIDDATA;
356 if ((err = av_image_check_size(avctx->width, avctx->height, 0, avctx)))
358 s->planesize = FFALIGN(avctx->width, 16) >> 3; // Align plane size in bits to word-boundary
359 s->planebuf = av_malloc(s->planesize + FF_INPUT_BUFFER_PADDING_SIZE);
361 return AVERROR(ENOMEM);
363 s->bpp = avctx->bits_per_coded_sample;
364 avcodec_get_frame_defaults(&s->frame);
366 if ((err = extract_header(avctx, NULL)) < 0)
368 s->frame.reference = 3;
374 * Decode interleaved plane buffer up to 8bpp
375 * @param dst Destination buffer
376 * @param buf Source buffer
378 * @param plane plane number to decode as
380 static void decodeplane8(uint8_t *dst, const uint8_t *buf, int buf_size, int plane)
382 const uint64_t *lut = plane8_lut[plane];
384 av_log(NULL, AV_LOG_WARNING, "Ignoring extra planes beyond 8\n");
388 uint64_t v = AV_RN64A(dst) | lut[*buf++];
391 } while (--buf_size);
395 * Decode interleaved plane buffer up to 24bpp
396 * @param dst Destination buffer
397 * @param buf Source buffer
399 * @param plane plane number to decode as
401 static void decodeplane32(uint32_t *dst, const uint8_t *buf, int buf_size, int plane)
403 const uint32_t *lut = plane32_lut[plane];
405 unsigned mask = (*buf >> 2) & ~3;
406 dst[0] |= lut[mask++];
407 dst[1] |= lut[mask++];
408 dst[2] |= lut[mask++];
410 mask = (*buf++ << 2) & 0x3F;
411 dst[4] |= lut[mask++];
412 dst[5] |= lut[mask++];
413 dst[6] |= lut[mask++];
416 } while (--buf_size);
419 #define DECODE_HAM_PLANE32(x) \
420 first = buf[x] << 1; \
421 second = buf[(x)+1] << 1; \
422 delta &= pal[first++]; \
423 delta |= pal[first]; \
425 delta &= pal[second++]; \
426 delta |= pal[second]; \
430 * Converts one line of HAM6/8-encoded chunky buffer to 24bpp.
432 * @param dst the destination 24bpp buffer
433 * @param buf the source 8bpp chunky buffer
434 * @param pal the HAM decode table
435 * @param buf_size the plane size in bytes
437 static void decode_ham_plane32(uint32_t *dst, const uint8_t *buf,
438 const uint32_t *const pal, unsigned buf_size)
440 uint32_t delta = pal[1]; /* first palette entry */
442 uint32_t first, second;
443 DECODE_HAM_PLANE32(0);
444 DECODE_HAM_PLANE32(2);
445 DECODE_HAM_PLANE32(4);
446 DECODE_HAM_PLANE32(6);
449 } while (--buf_size);
452 static void lookup_pal_indicies(uint32_t *dst, const uint32_t *buf,
453 const uint32_t *const pal, unsigned width)
456 *dst++ = pal[*buf++];
461 * Decode one complete byterun1 encoded line.
463 * @param dst the destination buffer where to store decompressed bitstream
464 * @param dst_size the destination plane size in bytes
465 * @param buf the source byterun1 compressed bitstream
466 * @param buf_end the EOF of source byterun1 compressed bitstream
467 * @return number of consumed bytes in byterun1 compressed bitstream
469 static int decode_byterun(uint8_t *dst, int dst_size,
470 const uint8_t *buf, const uint8_t *const buf_end) {
471 const uint8_t *const buf_start = buf;
473 for (x = 0; x < dst_size && buf < buf_end;) {
475 const int8_t value = *buf++;
478 memcpy(dst + x, buf, FFMIN3(length, dst_size - x, buf_end - buf));
480 } else if (value > -128) {
482 memset(dst + x, *buf++, FFMIN(length, dst_size - x));
488 return buf - buf_start;
491 #define DECODE_RGBX_COMMON(type) \
493 length = bytestream2_get_byte(gb); \
495 length = bytestream2_get_be16(gb); \
500 for (i = 0; i < length; i++) { \
501 *(type *)(dst + y*linesize + x * sizeof(type)) = pixel; \
513 * @param[out] dst Destination buffer
514 * @param width Width of destination buffer (pixels)
515 * @param height Height of destination buffer (pixels)
516 * @param linesize Line size of destination buffer (bytes)
518 static void decode_rgb8(GetByteContext *gb, uint8_t *dst, int width, int height, int linesize)
520 int x = 0, y = 0, i, length;
521 while (bytestream2_get_bytes_left(gb) >= 4) {
522 uint32_t pixel = 0xFF000000 | bytestream2_get_be24(gb);
523 length = bytestream2_get_byte(gb) & 0x7F;
524 DECODE_RGBX_COMMON(uint32_t)
530 * @param[out] dst Destination buffer
531 * @param width Width of destination buffer (pixels)
532 * @param height Height of destination buffer (pixels)
533 * @param linesize Line size of destination buffer (bytes)
535 static void decode_rgbn(GetByteContext *gb, uint8_t *dst, int width, int height, int linesize)
537 int x = 0, y = 0, i, length;
538 while (bytestream2_get_bytes_left(gb) >= 2) {
539 uint32_t pixel = bytestream2_get_be16u(gb);
540 length = pixel & 0x7;
542 DECODE_RGBX_COMMON(uint16_t)
547 * Decode DEEP RLE 32-bit buffer
548 * @param[out] dst Destination buffer
549 * @param[in] src Source buffer
550 * @param src_size Source buffer size (bytes)
551 * @param width Width of destination buffer (pixels)
552 * @param height Height of destination buffer (pixels)
553 * @param linesize Line size of destination buffer (bytes)
555 static void decode_deep_rle32(uint8_t *dst, const uint8_t *src, int src_size, int width, int height, int linesize)
557 const uint8_t *src_end = src + src_size;
559 while (src + 5 <= src_end) {
561 opcode = *(int8_t *)src++;
563 int size = opcode + 1;
564 for (i = 0; i < size; i++) {
565 int length = FFMIN(size - i, width);
566 memcpy(dst + y*linesize + x * 4, src, length * 4);
578 int size = -opcode + 1;
579 uint32_t pixel = AV_RN32(src);
580 for (i = 0; i < size; i++) {
581 *(uint32_t *)(dst + y*linesize + x * 4) = pixel;
596 * Decode DEEP TVDC 32-bit buffer
597 * @param[out] dst Destination buffer
598 * @param[in] src Source buffer
599 * @param src_size Source buffer size (bytes)
600 * @param width Width of destination buffer (pixels)
601 * @param height Height of destination buffer (pixels)
602 * @param linesize Line size of destination buffer (bytes)
603 * @param[int] tvdc TVDC lookup table
605 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)
607 int x = 0, y = 0, plane = 0;
611 for (i = 0; i < src_size * 2;) {
612 #define GETNIBBLE ((i & 1) ? (src[i>>1] & 0xF) : (src[i>>1] >> 4))
613 int d = tvdc[GETNIBBLE];
617 dst[y * linesize + x*4 + plane] = pixel;
620 if (i >= src_size * 2)
624 d = FFMIN(d, width - x);
625 for (j = 0; j < d; j++) {
626 dst[y * linesize + x*4 + plane] = pixel;
645 static int unsupported(AVCodecContext *avctx)
647 IffContext *s = avctx->priv_data;
648 av_log_ask_for_sample(avctx, "unsupported bitmap (compression %i, bpp %i, ham %i)\n", s->compression, s->bpp, s->ham);
649 return AVERROR_INVALIDDATA;
652 static int decode_frame(AVCodecContext *avctx,
653 void *data, int *got_frame,
656 IffContext *s = avctx->priv_data;
657 const uint8_t *buf = avpkt->size >= 2 ? avpkt->data + AV_RB16(avpkt->data) : NULL;
658 const int buf_size = avpkt->size >= 2 ? avpkt->size - AV_RB16(avpkt->data) : 0;
659 const uint8_t *buf_end = buf+buf_size;
663 if ((res = extract_header(avctx, avpkt)) < 0)
666 if ((res = avctx->reget_buffer(avctx, &s->frame)) < 0) {
667 av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
670 } else if ((res = ff_get_buffer(avctx, &s->frame)) < 0) {
671 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
673 } else if (avctx->bits_per_coded_sample <= 8 && avctx->pix_fmt == AV_PIX_FMT_PAL8) {
674 if ((res = cmap_read_palette(avctx, (uint32_t*)s->frame.data[1])) < 0)
676 } else if (avctx->pix_fmt == AV_PIX_FMT_RGB32 && avctx->bits_per_coded_sample <= 8) {
677 if ((res = cmap_read_palette(avctx, s->mask_palbuf)) < 0)
682 switch (s->compression) {
684 if (avctx->codec_tag == MKTAG('A','C','B','M')) {
685 if (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_PIX_FMT_GRAY8) {
686 memset(s->frame.data[0], 0, avctx->height * s->frame.linesize[0]);
687 for (plane = 0; plane < s->bpp; plane++) {
688 for(y = 0; y < avctx->height && buf < buf_end; y++ ) {
689 uint8_t *row = &s->frame.data[0][ y*s->frame.linesize[0] ];
690 decodeplane8(row, buf, FFMIN(s->planesize, buf_end - buf), plane);
694 } else if (s->ham) { // HAM to AV_PIX_FMT_BGR32
695 memset(s->frame.data[0], 0, avctx->height * s->frame.linesize[0]);
696 for(y = 0; y < avctx->height; y++) {
697 uint8_t *row = &s->frame.data[0][y * s->frame.linesize[0]];
698 memset(s->ham_buf, 0, s->planesize * 8);
699 for (plane = 0; plane < s->bpp; plane++) {
700 const uint8_t * start = buf + (plane * avctx->height + y) * s->planesize;
701 if (start >= buf_end)
703 decodeplane8(s->ham_buf, start, FFMIN(s->planesize, buf_end - start), plane);
705 decode_ham_plane32((uint32_t *) row, s->ham_buf, s->ham_palbuf, s->planesize);
708 return unsupported(avctx);
709 } else if (avctx->codec_tag == MKTAG('D','E','E','P')) {
710 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
711 int raw_width = avctx->width * (av_get_bits_per_pixel(desc) >> 3);
713 for(y = 0; y < avctx->height && buf < buf_end; y++ ) {
714 uint8_t *row = &s->frame.data[0][y * s->frame.linesize[0]];
715 memcpy(row, buf, FFMIN(raw_width, buf_end - buf));
717 if (avctx->pix_fmt == AV_PIX_FMT_BGR32) {
718 for(x = 0; x < avctx->width; x++)
719 row[4 * x + 3] = row[4 * x + 3] & 0xF0 | (row[4 * x + 3] >> 4);
722 } else if (avctx->codec_tag == MKTAG('I','L','B','M')) { // interleaved
723 if (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_PIX_FMT_GRAY8) {
724 for(y = 0; y < avctx->height; y++ ) {
725 uint8_t *row = &s->frame.data[0][ y*s->frame.linesize[0] ];
726 memset(row, 0, avctx->width);
727 for (plane = 0; plane < s->bpp && buf < buf_end; plane++) {
728 decodeplane8(row, buf, FFMIN(s->planesize, buf_end - buf), plane);
732 } else if (s->ham) { // HAM to AV_PIX_FMT_BGR32
733 for (y = 0; y < avctx->height; y++) {
734 uint8_t *row = &s->frame.data[0][ y*s->frame.linesize[0] ];
735 memset(s->ham_buf, 0, s->planesize * 8);
736 for (plane = 0; plane < s->bpp && buf < buf_end; plane++) {
737 decodeplane8(s->ham_buf, buf, FFMIN(s->planesize, buf_end - buf), plane);
740 decode_ham_plane32((uint32_t *) row, s->ham_buf, s->ham_palbuf, s->planesize);
742 } else { // AV_PIX_FMT_BGR32
743 for(y = 0; y < avctx->height; y++ ) {
744 uint8_t *row = &s->frame.data[0][y*s->frame.linesize[0]];
745 memset(row, 0, avctx->width << 2);
746 for (plane = 0; plane < s->bpp && buf < buf_end; plane++) {
747 decodeplane32((uint32_t *) row, buf, FFMIN(s->planesize, buf_end - buf), plane);
752 } else if (avctx->codec_tag == MKTAG('P','B','M',' ')) { // IFF-PBM
753 if (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_PIX_FMT_GRAY8) {
754 for(y = 0; y < avctx->height && buf_end > buf; y++ ) {
755 uint8_t *row = &s->frame.data[0][y * s->frame.linesize[0]];
756 memcpy(row, buf, FFMIN(avctx->width, buf_end - buf));
757 buf += avctx->width + (avctx->width % 2); // padding if odd
759 } else if (s->ham) { // IFF-PBM: HAM to AV_PIX_FMT_BGR32
760 for (y = 0; y < avctx->height && buf_end > buf; y++) {
761 uint8_t *row = &s->frame.data[0][ y*s->frame.linesize[0] ];
762 memcpy(s->ham_buf, buf, FFMIN(avctx->width, buf_end - buf));
763 buf += avctx->width + (avctx->width & 1); // padding if odd
764 decode_ham_plane32((uint32_t *) row, s->ham_buf, s->ham_palbuf, s->planesize);
767 return unsupported(avctx);
771 if (avctx->codec_tag == MKTAG('I','L','B','M')) { //interleaved
772 if (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_PIX_FMT_GRAY8) {
773 for(y = 0; y < avctx->height ; y++ ) {
774 uint8_t *row = &s->frame.data[0][ y*s->frame.linesize[0] ];
775 memset(row, 0, avctx->width);
776 for (plane = 0; plane < s->bpp; plane++) {
777 buf += decode_byterun(s->planebuf, s->planesize, buf, buf_end);
778 decodeplane8(row, s->planebuf, s->planesize, plane);
781 } else if (avctx->bits_per_coded_sample <= 8) { //8-bit (+ mask) to AV_PIX_FMT_BGR32
782 for (y = 0; y < avctx->height ; y++ ) {
783 uint8_t *row = &s->frame.data[0][y*s->frame.linesize[0]];
784 memset(s->mask_buf, 0, avctx->width * sizeof(uint32_t));
785 for (plane = 0; plane < s->bpp; plane++) {
786 buf += decode_byterun(s->planebuf, s->planesize, buf, buf_end);
787 decodeplane32(s->mask_buf, s->planebuf, s->planesize, plane);
789 lookup_pal_indicies((uint32_t *) row, s->mask_buf, s->mask_palbuf, avctx->width);
791 } else if (s->ham) { // HAM to AV_PIX_FMT_BGR32
792 for (y = 0; y < avctx->height ; y++) {
793 uint8_t *row = &s->frame.data[0][y*s->frame.linesize[0]];
794 memset(s->ham_buf, 0, s->planesize * 8);
795 for (plane = 0; plane < s->bpp; plane++) {
796 buf += decode_byterun(s->planebuf, s->planesize, buf, buf_end);
797 decodeplane8(s->ham_buf, s->planebuf, s->planesize, plane);
799 decode_ham_plane32((uint32_t *) row, s->ham_buf, s->ham_palbuf, s->planesize);
801 } else { //AV_PIX_FMT_BGR32
802 for(y = 0; y < avctx->height ; y++ ) {
803 uint8_t *row = &s->frame.data[0][y*s->frame.linesize[0]];
804 memset(row, 0, avctx->width << 2);
805 for (plane = 0; plane < s->bpp; plane++) {
806 buf += decode_byterun(s->planebuf, s->planesize, buf, buf_end);
807 decodeplane32((uint32_t *) row, s->planebuf, s->planesize, plane);
811 } else if (avctx->codec_tag == MKTAG('P','B','M',' ')) { // IFF-PBM
812 if (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_PIX_FMT_GRAY8) {
813 for(y = 0; y < avctx->height ; y++ ) {
814 uint8_t *row = &s->frame.data[0][y*s->frame.linesize[0]];
815 buf += decode_byterun(row, avctx->width, buf, buf_end);
817 } else if (s->ham) { // IFF-PBM: HAM to AV_PIX_FMT_BGR32
818 for (y = 0; y < avctx->height ; y++) {
819 uint8_t *row = &s->frame.data[0][y*s->frame.linesize[0]];
820 buf += decode_byterun(s->ham_buf, avctx->width, buf, buf_end);
821 decode_ham_plane32((uint32_t *) row, s->ham_buf, s->ham_palbuf, s->planesize);
824 return unsupported(avctx);
825 } else if (avctx->codec_tag == MKTAG('D','E','E','P')) { // IFF-DEEP
826 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
827 if (av_get_bits_per_pixel(desc) == 32)
828 decode_deep_rle32(s->frame.data[0], buf, buf_size, avctx->width, avctx->height, s->frame.linesize[0]);
830 return unsupported(avctx);
834 bytestream2_init(&gb, buf, buf_size);
835 if (avctx->codec_tag == MKTAG('R','G','B','8'))
836 decode_rgb8(&gb, s->frame.data[0], avctx->width, avctx->height, s->frame.linesize[0]);
837 else if (avctx->codec_tag == MKTAG('R','G','B','N'))
838 decode_rgbn(&gb, s->frame.data[0], avctx->width, avctx->height, s->frame.linesize[0]);
840 return unsupported(avctx);
843 if (avctx->codec_tag == MKTAG('D','E','E','P')) {
844 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
845 if (av_get_bits_per_pixel(desc) == 32)
846 decode_deep_tvdc32(s->frame.data[0], buf, buf_size, avctx->width, avctx->height, s->frame.linesize[0], s->tvdc);
848 return unsupported(avctx);
850 return unsupported(avctx);
853 return unsupported(avctx);
857 *(AVFrame*)data = s->frame;
861 static av_cold int decode_end(AVCodecContext *avctx)
863 IffContext *s = avctx->priv_data;
864 if (s->frame.data[0])
865 avctx->release_buffer(avctx, &s->frame);
866 av_freep(&s->planebuf);
867 av_freep(&s->ham_buf);
868 av_freep(&s->ham_palbuf);
872 #if CONFIG_IFF_ILBM_DECODER
873 AVCodec ff_iff_ilbm_decoder = {
875 .type = AVMEDIA_TYPE_VIDEO,
876 .id = AV_CODEC_ID_IFF_ILBM,
877 .priv_data_size = sizeof(IffContext),
880 .decode = decode_frame,
881 .capabilities = CODEC_CAP_DR1,
882 .long_name = NULL_IF_CONFIG_SMALL("IFF"),
885 #if CONFIG_IFF_BYTERUN1_DECODER
886 AVCodec ff_iff_byterun1_decoder = {
888 .type = AVMEDIA_TYPE_VIDEO,
889 .id = AV_CODEC_ID_IFF_BYTERUN1,
890 .priv_data_size = sizeof(IffContext),
893 .decode = decode_frame,
894 .capabilities = CODEC_CAP_DR1,
895 .long_name = NULL_IF_CONFIG_SMALL("IFF"),