2 * IFF PBM/ILBM 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 PBM/ILBM bitmap decoder
28 #include "libavutil/imgutils.h"
29 #include "bytestream.h"
37 MASK_HAS_TRANSPARENT_COLOR,
45 uint8_t * ham_buf; ///< temporary buffer for planar to chunky conversation
46 uint32_t *ham_palbuf; ///< HAM decode table
47 uint32_t *mask_buf; ///< temporary buffer for palette indices
48 uint32_t *mask_palbuf; ///< masking palette table
49 unsigned compression; ///< delta compression method used
50 unsigned bpp; ///< bits per plane to decode (differs from bits_per_coded_sample if HAM)
51 unsigned ham; ///< 0 if non-HAM or number of hold bits (6 for bpp > 6, 4 otherwise)
52 unsigned flags; ///< 1 for EHB, 0 is no extra half darkening
53 unsigned transparency; ///< TODO: transparency color index in palette
54 unsigned masking; ///< TODO: masking method used
55 int init; // 1 if buffer and palette data already initialized, 0 otherwise
58 #define LUT8_PART(plane, v) \
59 AV_LE2NE64C(UINT64_C(0x0000000)<<32 | v) << plane, \
60 AV_LE2NE64C(UINT64_C(0x1000000)<<32 | v) << plane, \
61 AV_LE2NE64C(UINT64_C(0x0010000)<<32 | v) << plane, \
62 AV_LE2NE64C(UINT64_C(0x1010000)<<32 | v) << plane, \
63 AV_LE2NE64C(UINT64_C(0x0000100)<<32 | v) << plane, \
64 AV_LE2NE64C(UINT64_C(0x1000100)<<32 | v) << plane, \
65 AV_LE2NE64C(UINT64_C(0x0010100)<<32 | v) << plane, \
66 AV_LE2NE64C(UINT64_C(0x1010100)<<32 | v) << plane, \
67 AV_LE2NE64C(UINT64_C(0x0000001)<<32 | v) << plane, \
68 AV_LE2NE64C(UINT64_C(0x1000001)<<32 | v) << plane, \
69 AV_LE2NE64C(UINT64_C(0x0010001)<<32 | v) << plane, \
70 AV_LE2NE64C(UINT64_C(0x1010001)<<32 | v) << plane, \
71 AV_LE2NE64C(UINT64_C(0x0000101)<<32 | v) << plane, \
72 AV_LE2NE64C(UINT64_C(0x1000101)<<32 | v) << plane, \
73 AV_LE2NE64C(UINT64_C(0x0010101)<<32 | v) << plane, \
74 AV_LE2NE64C(UINT64_C(0x1010101)<<32 | v) << plane
76 #define LUT8(plane) { \
77 LUT8_PART(plane, 0x0000000), \
78 LUT8_PART(plane, 0x1000000), \
79 LUT8_PART(plane, 0x0010000), \
80 LUT8_PART(plane, 0x1010000), \
81 LUT8_PART(plane, 0x0000100), \
82 LUT8_PART(plane, 0x1000100), \
83 LUT8_PART(plane, 0x0010100), \
84 LUT8_PART(plane, 0x1010100), \
85 LUT8_PART(plane, 0x0000001), \
86 LUT8_PART(plane, 0x1000001), \
87 LUT8_PART(plane, 0x0010001), \
88 LUT8_PART(plane, 0x1010001), \
89 LUT8_PART(plane, 0x0000101), \
90 LUT8_PART(plane, 0x1000101), \
91 LUT8_PART(plane, 0x0010101), \
92 LUT8_PART(plane, 0x1010101), \
95 // 8 planes * 8-bit mask
96 static const uint64_t plane8_lut[8][256] = {
97 LUT8(0), LUT8(1), LUT8(2), LUT8(3),
98 LUT8(4), LUT8(5), LUT8(6), LUT8(7),
101 #define LUT32(plane) { \
103 0, 0, 0, 1 << plane, \
104 0, 0, 1 << plane, 0, \
105 0, 0, 1 << plane, 1 << plane, \
106 0, 1 << plane, 0, 0, \
107 0, 1 << plane, 0, 1 << plane, \
108 0, 1 << plane, 1 << plane, 0, \
109 0, 1 << plane, 1 << plane, 1 << plane, \
110 1 << plane, 0, 0, 0, \
111 1 << plane, 0, 0, 1 << plane, \
112 1 << plane, 0, 1 << plane, 0, \
113 1 << plane, 0, 1 << plane, 1 << plane, \
114 1 << plane, 1 << plane, 0, 0, \
115 1 << plane, 1 << plane, 0, 1 << plane, \
116 1 << plane, 1 << plane, 1 << plane, 0, \
117 1 << plane, 1 << plane, 1 << plane, 1 << plane, \
120 // 32 planes * 4-bit mask * 4 lookup tables each
121 static const uint32_t plane32_lut[32][16*4] = {
122 LUT32( 0), LUT32( 1), LUT32( 2), LUT32( 3),
123 LUT32( 4), LUT32( 5), LUT32( 6), LUT32( 7),
124 LUT32( 8), LUT32( 9), LUT32(10), LUT32(11),
125 LUT32(12), LUT32(13), LUT32(14), LUT32(15),
126 LUT32(16), LUT32(17), LUT32(18), LUT32(19),
127 LUT32(20), LUT32(21), LUT32(22), LUT32(23),
128 LUT32(24), LUT32(25), LUT32(26), LUT32(27),
129 LUT32(28), LUT32(29), LUT32(30), LUT32(31),
132 // Gray to RGB, required for palette table of grayscale images with bpp < 8
133 static av_always_inline uint32_t gray2rgb(const uint32_t x) {
134 return x << 16 | x << 8 | x;
138 * Convert CMAP buffer (stored in extradata) to lavc palette format
140 static int ff_cmap_read_palette(AVCodecContext *avctx, uint32_t *pal)
142 IffContext *s = avctx->priv_data;
144 const uint8_t *const palette = avctx->extradata + AV_RB16(avctx->extradata);
145 int palette_size = avctx->extradata_size - AV_RB16(avctx->extradata);
147 if (avctx->bits_per_coded_sample > 8) {
148 av_log(avctx, AV_LOG_ERROR, "bits_per_coded_sample > 8 not supported\n");
149 return AVERROR_INVALIDDATA;
152 count = 1 << avctx->bits_per_coded_sample;
153 // If extradata is smaller than actually needed, fill the remaining with black.
154 count = FFMIN(palette_size / 3, count);
156 for (i=0; i < count; i++) {
157 pal[i] = 0xFF000000 | AV_RB24(palette + i*3);
159 if (s->flags && count >= 32) { // EHB
160 for (i = 0; i < 32; i++)
161 pal[i + 32] = 0xFF000000 | (AV_RB24(palette + i*3) & 0xFEFEFE) >> 1;
162 count = FFMAX(count, 64);
164 } else { // Create gray-scale color palette for bps < 8
165 count = 1 << avctx->bits_per_coded_sample;
167 for (i=0; i < count; i++) {
168 pal[i] = 0xFF000000 | gray2rgb((i * 255) >> avctx->bits_per_coded_sample);
171 if (s->masking == MASK_HAS_MASK) {
172 memcpy(pal + (1 << avctx->bits_per_coded_sample), pal, count * 4);
173 for (i = 0; i < count; i++)
175 } else if (s->masking == MASK_HAS_TRANSPARENT_COLOR &&
176 s->transparency < 1 << avctx->bits_per_coded_sample)
177 pal[s->transparency] &= 0xFFFFFF;
182 * Extracts the IFF extra context and updates internal
183 * decoder structures.
185 * @param avctx the AVCodecContext where to extract extra context to
186 * @param avpkt the AVPacket to extract extra context from or NULL to use avctx
187 * @return 0 in case of success, a negative error code otherwise
189 static int extract_header(AVCodecContext *const avctx,
190 const AVPacket *const avpkt) {
193 IffContext *s = avctx->priv_data;
196 if (avctx->extradata_size < 2) {
197 av_log(avctx, AV_LOG_ERROR, "not enough extradata\n");
198 return AVERROR_INVALIDDATA;
200 palette_size = avctx->extradata_size - AV_RB16(avctx->extradata);
205 return AVERROR_INVALIDDATA;
206 image_size = avpkt->size - AV_RB16(avpkt->data);
208 buf_size = bytestream_get_be16(&buf);
209 if (buf_size <= 1 || image_size <= 1) {
210 av_log(avctx, AV_LOG_ERROR,
211 "Invalid image size received: %u -> image data offset: %d\n",
212 buf_size, image_size);
213 return AVERROR_INVALIDDATA;
216 buf = avctx->extradata;
217 buf_size = bytestream_get_be16(&buf);
218 if (buf_size <= 1 || palette_size < 0) {
219 av_log(avctx, AV_LOG_ERROR,
220 "Invalid palette size received: %u -> palette data offset: %d\n",
221 buf_size, palette_size);
222 return AVERROR_INVALIDDATA;
227 s->compression = bytestream_get_byte(&buf);
228 s->bpp = bytestream_get_byte(&buf);
229 s->ham = bytestream_get_byte(&buf);
230 s->flags = bytestream_get_byte(&buf);
231 s->transparency = bytestream_get_be16(&buf);
232 s->masking = bytestream_get_byte(&buf);
233 if (s->masking == MASK_HAS_MASK) {
235 avctx->pix_fmt = AV_PIX_FMT_RGB32;
236 av_freep(&s->mask_buf);
237 av_freep(&s->mask_palbuf);
238 s->mask_buf = av_malloc((s->planesize * 32) + FF_INPUT_BUFFER_PADDING_SIZE);
240 return AVERROR(ENOMEM);
242 av_log(avctx, AV_LOG_ERROR, "bpp %d too large for palette\n", s->bpp);
243 av_freep(&s->mask_buf);
244 return AVERROR(ENOMEM);
246 s->mask_palbuf = av_malloc((2 << s->bpp) * sizeof(uint32_t) + FF_INPUT_BUFFER_PADDING_SIZE);
247 if (!s->mask_palbuf) {
248 av_freep(&s->mask_buf);
249 return AVERROR(ENOMEM);
253 } else if (s->masking != MASK_NONE && s->masking != MASK_HAS_TRANSPARENT_COLOR) {
254 av_log(avctx, AV_LOG_ERROR, "Masking not supported\n");
255 return AVERROR_PATCHWELCOME;
257 if (!s->bpp || s->bpp > 32) {
258 av_log(avctx, AV_LOG_ERROR, "Invalid number of bitplanes: %u\n", s->bpp);
259 return AVERROR_INVALIDDATA;
260 } else if (s->ham >= 8) {
261 av_log(avctx, AV_LOG_ERROR, "Invalid number of hold bits for HAM: %u\n", s->ham);
262 return AVERROR_INVALIDDATA;
265 av_freep(&s->ham_buf);
266 av_freep(&s->ham_palbuf);
269 int i, count = FFMIN(palette_size / 3, 1 << s->ham);
271 const uint8_t *const palette = avctx->extradata + AV_RB16(avctx->extradata);
273 s->ham_buf = av_malloc((s->planesize * 8) + FF_INPUT_BUFFER_PADDING_SIZE);
275 return AVERROR(ENOMEM);
277 ham_count = 8 * (1 << s->ham);
278 s->ham_palbuf = av_malloc((ham_count << !!(s->masking == MASK_HAS_MASK)) * sizeof (uint32_t) + FF_INPUT_BUFFER_PADDING_SIZE);
279 if (!s->ham_palbuf) {
280 av_freep(&s->ham_buf);
281 return AVERROR(ENOMEM);
284 if (count) { // HAM with color palette attached
285 // prefill with black and palette and set HAM take direct value mask to zero
286 memset(s->ham_palbuf, 0, (1 << s->ham) * 2 * sizeof (uint32_t));
287 for (i=0; i < count; i++) {
288 s->ham_palbuf[i*2+1] = 0xFF000000 | AV_RL24(palette + i*3);
291 } else { // HAM with grayscale color palette
293 for (i=0; i < count; i++) {
294 s->ham_palbuf[i*2] = 0xFF000000; // take direct color value from palette
295 s->ham_palbuf[i*2+1] = 0xFF000000 | av_le2ne32(gray2rgb((i * 255) >> s->ham));
298 for (i=0; i < count; i++) {
299 uint32_t tmp = i << (8 - s->ham);
300 tmp |= tmp >> s->ham;
301 s->ham_palbuf[(i+count)*2] = 0xFF00FFFF; // just modify blue color component
302 s->ham_palbuf[(i+count*2)*2] = 0xFFFFFF00; // just modify red color component
303 s->ham_palbuf[(i+count*3)*2] = 0xFFFF00FF; // just modify green color component
304 s->ham_palbuf[(i+count)*2+1] = 0xFF000000 | tmp << 16;
305 s->ham_palbuf[(i+count*2)*2+1] = 0xFF000000 | tmp;
306 s->ham_palbuf[(i+count*3)*2+1] = 0xFF000000 | tmp << 8;
308 if (s->masking == MASK_HAS_MASK) {
309 for (i = 0; i < ham_count; i++)
310 s->ham_palbuf[(1 << s->bpp) + i] = s->ham_palbuf[i] | 0xFF000000;
318 static av_cold int decode_init(AVCodecContext *avctx)
320 IffContext *s = avctx->priv_data;
323 if (avctx->bits_per_coded_sample <= 8) {
326 if (avctx->extradata_size >= 2)
327 palette_size = avctx->extradata_size - AV_RB16(avctx->extradata);
330 avctx->pix_fmt = (avctx->bits_per_coded_sample < 8) ||
331 (avctx->extradata_size >= 2 && palette_size) ? AV_PIX_FMT_PAL8 : AV_PIX_FMT_GRAY8;
332 } else if (avctx->bits_per_coded_sample <= 32) {
333 if (avctx->codec_tag != MKTAG('D','E','E','P'))
334 avctx->pix_fmt = AV_PIX_FMT_BGR32;
336 return AVERROR_INVALIDDATA;
339 if ((err = av_image_check_size(avctx->width, avctx->height, 0, avctx)))
341 s->planesize = FFALIGN(avctx->width, 16) >> 3; // Align plane size in bits to word-boundary
342 s->planebuf = av_malloc(s->planesize + FF_INPUT_BUFFER_PADDING_SIZE);
344 return AVERROR(ENOMEM);
346 s->bpp = avctx->bits_per_coded_sample;
347 avcodec_get_frame_defaults(&s->frame);
349 if ((err = extract_header(avctx, NULL)) < 0)
351 s->frame.reference = 3;
357 * Decode interleaved plane buffer up to 8bpp
358 * @param dst Destination buffer
359 * @param buf Source buffer
361 * @param plane plane number to decode as
363 static void decodeplane8(uint8_t *dst, const uint8_t *buf, int buf_size, int plane)
365 const uint64_t *lut = plane8_lut[plane];
367 uint64_t v = AV_RN64A(dst) | lut[*buf++];
370 } while (--buf_size);
374 * Decode interleaved plane buffer up to 24bpp
375 * @param dst Destination buffer
376 * @param buf Source buffer
378 * @param plane plane number to decode as
380 static void decodeplane32(uint32_t *dst, const uint8_t *buf, int buf_size, int plane)
382 const uint32_t *lut = plane32_lut[plane];
384 unsigned mask = (*buf >> 2) & ~3;
385 dst[0] |= lut[mask++];
386 dst[1] |= lut[mask++];
387 dst[2] |= lut[mask++];
389 mask = (*buf++ << 2) & 0x3F;
390 dst[4] |= lut[mask++];
391 dst[5] |= lut[mask++];
392 dst[6] |= lut[mask++];
395 } while (--buf_size);
398 #define DECODE_HAM_PLANE32(x) \
399 first = buf[x] << 1; \
400 second = buf[(x)+1] << 1; \
401 delta &= pal[first++]; \
402 delta |= pal[first]; \
404 delta &= pal[second++]; \
405 delta |= pal[second]; \
409 * Converts one line of HAM6/8-encoded chunky buffer to 24bpp.
411 * @param dst the destination 24bpp buffer
412 * @param buf the source 8bpp chunky buffer
413 * @param pal the HAM decode table
414 * @param buf_size the plane size in bytes
416 static void decode_ham_plane32(uint32_t *dst, const uint8_t *buf,
417 const uint32_t *const pal, unsigned buf_size)
421 uint32_t first, second;
422 DECODE_HAM_PLANE32(0);
423 DECODE_HAM_PLANE32(2);
424 DECODE_HAM_PLANE32(4);
425 DECODE_HAM_PLANE32(6);
428 } while (--buf_size);
431 static void lookup_pal_indicies(uint32_t *dst, const uint32_t *buf,
432 const uint32_t *const pal, unsigned width)
435 *dst++ = pal[*buf++];
440 * Decode one complete byterun1 encoded line.
442 * @param dst the destination buffer where to store decompressed bitstream
443 * @param dst_size the destination plane size in bytes
444 * @param buf the source byterun1 compressed bitstream
445 * @param buf_end the EOF of source byterun1 compressed bitstream
446 * @return number of consumed bytes in byterun1 compressed bitstream
448 static int decode_byterun(uint8_t *dst, int dst_size,
449 const uint8_t *buf, const uint8_t *const buf_end) {
450 const uint8_t *const buf_start = buf;
452 for (x = 0; x < dst_size && buf < buf_end;) {
454 const int8_t value = *buf++;
457 memcpy(dst + x, buf, FFMIN3(length, dst_size - x, buf_end - buf));
459 } else if (value > -128) {
461 memset(dst + x, *buf++, FFMIN(length, dst_size - x));
467 return buf - buf_start;
470 static int decode_frame_ilbm(AVCodecContext *avctx,
471 void *data, int *data_size,
474 IffContext *s = avctx->priv_data;
475 const uint8_t *buf = avpkt->size >= 2 ? avpkt->data + AV_RB16(avpkt->data) : NULL;
476 const int buf_size = avpkt->size >= 2 ? avpkt->size - AV_RB16(avpkt->data) : 0;
477 const uint8_t *buf_end = buf+buf_size;
480 if ((res = extract_header(avctx, avpkt)) < 0)
484 if ((res = avctx->reget_buffer(avctx, &s->frame)) < 0) {
485 av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
488 } else if ((res = avctx->get_buffer(avctx, &s->frame)) < 0) {
489 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
491 } else if (avctx->bits_per_coded_sample <= 8 && avctx->pix_fmt == AV_PIX_FMT_PAL8) {
492 if ((res = ff_cmap_read_palette(avctx, (uint32_t*)s->frame.data[1])) < 0)
497 if (avctx->codec_tag == MKTAG('A','C','B','M')) {
498 if (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_PIX_FMT_GRAY8) {
499 memset(s->frame.data[0], 0, avctx->height * s->frame.linesize[0]);
500 for (plane = 0; plane < s->bpp; plane++) {
501 for(y = 0; y < avctx->height && buf < buf_end; y++ ) {
502 uint8_t *row = &s->frame.data[0][ y*s->frame.linesize[0] ];
503 decodeplane8(row, buf, FFMIN(s->planesize, buf_end - buf), plane);
507 } else if (s->ham) { // HAM to AV_PIX_FMT_BGR32
508 memset(s->frame.data[0], 0, avctx->height * s->frame.linesize[0]);
509 for(y = 0; y < avctx->height; y++) {
510 uint8_t *row = &s->frame.data[0][y * s->frame.linesize[0]];
511 memset(s->ham_buf, 0, s->planesize * 8);
512 for (plane = 0; plane < s->bpp; plane++) {
513 const uint8_t * start = buf + (plane * avctx->height + y) * s->planesize;
514 if (start >= buf_end)
516 decodeplane8(s->ham_buf, start, FFMIN(s->planesize, buf_end - start), plane);
518 decode_ham_plane32((uint32_t *) row, s->ham_buf, s->ham_palbuf, s->planesize);
521 } else if (avctx->codec_tag == MKTAG('D','E','E','P')) {
522 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
523 int raw_width = avctx->width * (av_get_bits_per_pixel(desc) >> 3);
525 for(y = 0; y < avctx->height && buf < buf_end; y++ ) {
526 uint8_t *row = &s->frame.data[0][y * s->frame.linesize[0]];
527 memcpy(row, buf, FFMIN(raw_width, buf_end - buf));
529 if (avctx->pix_fmt == AV_PIX_FMT_BGR32) {
530 for(x = 0; x < avctx->width; x++)
531 row[4 * x + 3] = row[4 * x + 3] & 0xF0 | (row[4 * x + 3] >> 4);
534 } else if (avctx->codec_tag == MKTAG('I','L','B','M')) { // interleaved
535 if (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_PIX_FMT_GRAY8) {
536 for(y = 0; y < avctx->height; y++ ) {
537 uint8_t *row = &s->frame.data[0][ y*s->frame.linesize[0] ];
538 memset(row, 0, avctx->width);
539 for (plane = 0; plane < s->bpp && buf < buf_end; plane++) {
540 decodeplane8(row, buf, FFMIN(s->planesize, buf_end - buf), plane);
544 } else if (s->ham) { // HAM to AV_PIX_FMT_BGR32
545 for (y = 0; y < avctx->height; y++) {
546 uint8_t *row = &s->frame.data[0][ y*s->frame.linesize[0] ];
547 memset(s->ham_buf, 0, s->planesize * 8);
548 for (plane = 0; plane < s->bpp && buf < buf_end; plane++) {
549 decodeplane8(s->ham_buf, buf, FFMIN(s->planesize, buf_end - buf), plane);
552 decode_ham_plane32((uint32_t *) row, s->ham_buf, s->ham_palbuf, s->planesize);
554 } else { // AV_PIX_FMT_BGR32
555 for(y = 0; y < avctx->height; y++ ) {
556 uint8_t *row = &s->frame.data[0][y*s->frame.linesize[0]];
557 memset(row, 0, avctx->width << 2);
558 for (plane = 0; plane < s->bpp && buf < buf_end; plane++) {
559 decodeplane32((uint32_t *) row, buf, FFMIN(s->planesize, buf_end - buf), plane);
564 } else if (avctx->codec_tag == MKTAG('P','B','M',' ')) { // IFF-PBM
565 if (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_PIX_FMT_GRAY8) {
566 for(y = 0; y < avctx->height; y++ ) {
567 uint8_t *row = &s->frame.data[0][y * s->frame.linesize[0]];
568 memcpy(row, buf, FFMIN(avctx->width, buf_end - buf));
569 buf += avctx->width + (avctx->width % 2); // padding if odd
571 } else if (s->ham) { // IFF-PBM: HAM to AV_PIX_FMT_BGR32
572 for (y = 0; y < avctx->height; y++) {
573 uint8_t *row = &s->frame.data[0][ y*s->frame.linesize[0] ];
574 memcpy(s->ham_buf, buf, FFMIN(avctx->width, buf_end - buf));
575 buf += avctx->width + (avctx->width & 1); // padding if odd
576 decode_ham_plane32((uint32_t *) row, s->ham_buf, s->ham_palbuf, s->planesize);
579 av_log_ask_for_sample(avctx, "unsupported bpp\n");
580 return AVERROR_INVALIDDATA;
584 *data_size = sizeof(AVFrame);
585 *(AVFrame*)data = s->frame;
589 static int decode_frame_byterun1(AVCodecContext *avctx,
590 void *data, int *data_size,
593 IffContext *s = avctx->priv_data;
594 const uint8_t *buf = avpkt->size >= 2 ? avpkt->data + AV_RB16(avpkt->data) : NULL;
595 const int buf_size = avpkt->size >= 2 ? avpkt->size - AV_RB16(avpkt->data) : 0;
596 const uint8_t *buf_end = buf+buf_size;
599 if ((res = extract_header(avctx, avpkt)) < 0)
602 if ((res = avctx->reget_buffer(avctx, &s->frame)) < 0) {
603 av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
606 } else if ((res = avctx->get_buffer(avctx, &s->frame)) < 0) {
607 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
609 } else if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {
610 if ((res = ff_cmap_read_palette(avctx, (uint32_t*)s->frame.data[1])) < 0)
612 } else if (avctx->pix_fmt == AV_PIX_FMT_RGB32 && avctx->bits_per_coded_sample <= 8) {
613 if ((res = ff_cmap_read_palette(avctx, s->mask_palbuf)) < 0)
618 if (avctx->codec_tag == MKTAG('I','L','B','M')) { //interleaved
619 if (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_PIX_FMT_GRAY8) {
620 for(y = 0; y < avctx->height ; y++ ) {
621 uint8_t *row = &s->frame.data[0][ y*s->frame.linesize[0] ];
622 memset(row, 0, avctx->width);
623 for (plane = 0; plane < s->bpp; plane++) {
624 buf += decode_byterun(s->planebuf, s->planesize, buf, buf_end);
625 decodeplane8(row, s->planebuf, s->planesize, plane);
628 } else if (avctx->bits_per_coded_sample <= 8) { //8-bit (+ mask) to AV_PIX_FMT_BGR32
629 for (y = 0; y < avctx->height ; y++ ) {
630 uint8_t *row = &s->frame.data[0][y*s->frame.linesize[0]];
631 memset(s->mask_buf, 0, avctx->width * sizeof(uint32_t));
632 for (plane = 0; plane < s->bpp; plane++) {
633 buf += decode_byterun(s->planebuf, s->planesize, buf, buf_end);
634 decodeplane32(s->mask_buf, s->planebuf, s->planesize, plane);
636 lookup_pal_indicies((uint32_t *) row, s->mask_buf, s->mask_palbuf, avctx->width);
638 } else if (s->ham) { // HAM to AV_PIX_FMT_BGR32
639 for (y = 0; y < avctx->height ; y++) {
640 uint8_t *row = &s->frame.data[0][y*s->frame.linesize[0]];
641 memset(s->ham_buf, 0, s->planesize * 8);
642 for (plane = 0; plane < s->bpp; plane++) {
643 buf += decode_byterun(s->planebuf, s->planesize, buf, buf_end);
644 decodeplane8(s->ham_buf, s->planebuf, s->planesize, plane);
646 decode_ham_plane32((uint32_t *) row, s->ham_buf, s->ham_palbuf, s->planesize);
648 } else { //AV_PIX_FMT_BGR32
649 for(y = 0; y < avctx->height ; y++ ) {
650 uint8_t *row = &s->frame.data[0][y*s->frame.linesize[0]];
651 memset(row, 0, avctx->width << 2);
652 for (plane = 0; plane < s->bpp; plane++) {
653 buf += decode_byterun(s->planebuf, s->planesize, buf, buf_end);
654 decodeplane32((uint32_t *) row, s->planebuf, s->planesize, plane);
658 } else if (avctx->codec_tag == MKTAG('P','B','M',' ')) { // IFF-PBM
659 if (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_PIX_FMT_GRAY8) {
660 for(y = 0; y < avctx->height ; y++ ) {
661 uint8_t *row = &s->frame.data[0][y*s->frame.linesize[0]];
662 buf += decode_byterun(row, avctx->width, buf, buf_end);
664 } else if (s->ham) { // IFF-PBM: HAM to AV_PIX_FMT_BGR32
665 for (y = 0; y < avctx->height ; y++) {
666 uint8_t *row = &s->frame.data[0][y*s->frame.linesize[0]];
667 buf += decode_byterun(s->ham_buf, avctx->width, buf, buf_end);
668 decode_ham_plane32((uint32_t *) row, s->ham_buf, s->ham_palbuf, s->planesize);
671 av_log_ask_for_sample(avctx, "unsupported bpp\n");
672 return AVERROR_INVALIDDATA;
676 *data_size = sizeof(AVFrame);
677 *(AVFrame*)data = s->frame;
681 static av_cold int decode_end(AVCodecContext *avctx)
683 IffContext *s = avctx->priv_data;
684 if (s->frame.data[0])
685 avctx->release_buffer(avctx, &s->frame);
686 av_freep(&s->planebuf);
687 av_freep(&s->ham_buf);
688 av_freep(&s->ham_palbuf);
692 #if CONFIG_IFF_ILBM_DECODER
693 AVCodec ff_iff_ilbm_decoder = {
695 .type = AVMEDIA_TYPE_VIDEO,
696 .id = AV_CODEC_ID_IFF_ILBM,
697 .priv_data_size = sizeof(IffContext),
700 .decode = decode_frame_ilbm,
701 .capabilities = CODEC_CAP_DR1,
702 .long_name = NULL_IF_CONFIG_SMALL("IFF ILBM"),
705 #if CONFIG_IFF_BYTERUN1_DECODER
706 AVCodec ff_iff_byterun1_decoder = {
707 .name = "iff_byterun1",
708 .type = AVMEDIA_TYPE_VIDEO,
709 .id = AV_CODEC_ID_IFF_BYTERUN1,
710 .priv_data_size = sizeof(IffContext),
713 .decode = decode_frame_byterun1,
714 .capabilities = CODEC_CAP_DR1,
715 .long_name = NULL_IF_CONFIG_SMALL("IFF ByteRun1"),