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) {
234 if (s->bpp >= 8 && !s->ham) {
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 if (avctx->bits_per_coded_sample == 24) {
335 avctx->pix_fmt = AV_PIX_FMT_RGB0;
336 } else if (avctx->bits_per_coded_sample == 32) {
337 avctx->pix_fmt = AV_PIX_FMT_BGR32;
339 av_log_ask_for_sample(avctx, "unknown bits_per_coded_sample\n");
340 return AVERROR_PATCHWELCOME;
344 return AVERROR_INVALIDDATA;
347 if ((err = av_image_check_size(avctx->width, avctx->height, 0, avctx)))
349 s->planesize = FFALIGN(avctx->width, 16) >> 3; // Align plane size in bits to word-boundary
350 s->planebuf = av_malloc(s->planesize + FF_INPUT_BUFFER_PADDING_SIZE);
352 return AVERROR(ENOMEM);
354 s->bpp = avctx->bits_per_coded_sample;
355 avcodec_get_frame_defaults(&s->frame);
357 if ((err = extract_header(avctx, NULL)) < 0)
359 s->frame.reference = 3;
365 * Decode interleaved plane buffer up to 8bpp
366 * @param dst Destination buffer
367 * @param buf Source buffer
369 * @param plane plane number to decode as
371 static void decodeplane8(uint8_t *dst, const uint8_t *buf, int buf_size, int plane)
373 const uint64_t *lut = plane8_lut[plane];
375 av_log(NULL, AV_LOG_WARNING, "Ignoring extra planes beyond 8\n");
379 uint64_t v = AV_RN64A(dst) | lut[*buf++];
382 } while (--buf_size);
386 * Decode interleaved plane buffer up to 24bpp
387 * @param dst Destination buffer
388 * @param buf Source buffer
390 * @param plane plane number to decode as
392 static void decodeplane32(uint32_t *dst, const uint8_t *buf, int buf_size, int plane)
394 const uint32_t *lut = plane32_lut[plane];
396 unsigned mask = (*buf >> 2) & ~3;
397 dst[0] |= lut[mask++];
398 dst[1] |= lut[mask++];
399 dst[2] |= lut[mask++];
401 mask = (*buf++ << 2) & 0x3F;
402 dst[4] |= lut[mask++];
403 dst[5] |= lut[mask++];
404 dst[6] |= lut[mask++];
407 } while (--buf_size);
410 #define DECODE_HAM_PLANE32(x) \
411 first = buf[x] << 1; \
412 second = buf[(x)+1] << 1; \
413 delta &= pal[first++]; \
414 delta |= pal[first]; \
416 delta &= pal[second++]; \
417 delta |= pal[second]; \
421 * Converts one line of HAM6/8-encoded chunky buffer to 24bpp.
423 * @param dst the destination 24bpp buffer
424 * @param buf the source 8bpp chunky buffer
425 * @param pal the HAM decode table
426 * @param buf_size the plane size in bytes
428 static void decode_ham_plane32(uint32_t *dst, const uint8_t *buf,
429 const uint32_t *const pal, unsigned buf_size)
431 uint32_t delta = pal[1]; /* first palette entry */
433 uint32_t first, second;
434 DECODE_HAM_PLANE32(0);
435 DECODE_HAM_PLANE32(2);
436 DECODE_HAM_PLANE32(4);
437 DECODE_HAM_PLANE32(6);
440 } while (--buf_size);
443 static void lookup_pal_indicies(uint32_t *dst, const uint32_t *buf,
444 const uint32_t *const pal, unsigned width)
447 *dst++ = pal[*buf++];
452 * Decode one complete byterun1 encoded line.
454 * @param dst the destination buffer where to store decompressed bitstream
455 * @param dst_size the destination plane size in bytes
456 * @param buf the source byterun1 compressed bitstream
457 * @param buf_end the EOF of source byterun1 compressed bitstream
458 * @return number of consumed bytes in byterun1 compressed bitstream
460 static int decode_byterun(uint8_t *dst, int dst_size,
461 const uint8_t *buf, const uint8_t *const buf_end) {
462 const uint8_t *const buf_start = buf;
464 for (x = 0; x < dst_size && buf < buf_end;) {
466 const int8_t value = *buf++;
469 memcpy(dst + x, buf, FFMIN3(length, dst_size - x, buf_end - buf));
471 } else if (value > -128) {
473 memset(dst + x, *buf++, FFMIN(length, dst_size - x));
479 return buf - buf_start;
483 * Decode DEEP RLE 32-bit buffer
484 * @param[out] dst Destination buffer
485 * @param[in] src Source buffer
486 * @param src_size Source buffer size (bytes)
487 * @param width Width of destination buffer (pixels)
488 * @param height Height of destination buffer (pixels)
489 * @param linesize Line size of destination buffer (bytes)
491 static void decode_deep_rle32(uint8_t *dst, const uint8_t *src, int src_size, int width, int height, int linesize)
493 const uint8_t *src_end = src + src_size;
495 while (src + 5 <= src_end) {
497 opcode = *(int8_t *)src++;
499 int size = opcode + 1;
500 for (i = 0; i < size; i++) {
501 int length = FFMIN(size - i, width);
502 memcpy(dst + y*linesize + x * 4, src, length * 4);
514 int size = -opcode + 1;
515 uint32_t pixel = AV_RL32(src);
516 for (i = 0; i < size; i++) {
517 *(uint32_t *)(dst + y*linesize + x * 4) = pixel;
531 static int unsupported(AVCodecContext *avctx)
533 IffContext *s = avctx->priv_data;
534 av_log_ask_for_sample(avctx, "unsupported bitmap (compression %i, bpp %i, ham %i)\n", s->compression, s->bpp, s->ham);
535 return AVERROR_INVALIDDATA;
538 static int decode_frame(AVCodecContext *avctx,
539 void *data, int *data_size,
542 IffContext *s = avctx->priv_data;
543 const uint8_t *buf = avpkt->size >= 2 ? avpkt->data + AV_RB16(avpkt->data) : NULL;
544 const int buf_size = avpkt->size >= 2 ? avpkt->size - AV_RB16(avpkt->data) : 0;
545 const uint8_t *buf_end = buf+buf_size;
548 if ((res = extract_header(avctx, avpkt)) < 0)
551 if ((res = avctx->reget_buffer(avctx, &s->frame)) < 0) {
552 av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
555 } else if ((res = avctx->get_buffer(avctx, &s->frame)) < 0) {
556 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
558 } else if (avctx->bits_per_coded_sample <= 8 && avctx->pix_fmt == AV_PIX_FMT_PAL8) {
559 if ((res = ff_cmap_read_palette(avctx, (uint32_t*)s->frame.data[1])) < 0)
561 } else if (avctx->pix_fmt == AV_PIX_FMT_RGB32 && avctx->bits_per_coded_sample <= 8) {
562 if ((res = ff_cmap_read_palette(avctx, s->mask_palbuf)) < 0)
567 switch (s->compression) {
569 if (avctx->codec_tag == MKTAG('A','C','B','M')) {
570 if (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_PIX_FMT_GRAY8) {
571 memset(s->frame.data[0], 0, avctx->height * s->frame.linesize[0]);
572 for (plane = 0; plane < s->bpp; plane++) {
573 for(y = 0; y < avctx->height && buf < buf_end; y++ ) {
574 uint8_t *row = &s->frame.data[0][ y*s->frame.linesize[0] ];
575 decodeplane8(row, buf, FFMIN(s->planesize, buf_end - buf), plane);
579 } else if (s->ham) { // HAM to AV_PIX_FMT_BGR32
580 memset(s->frame.data[0], 0, avctx->height * s->frame.linesize[0]);
581 for(y = 0; y < avctx->height; y++) {
582 uint8_t *row = &s->frame.data[0][y * s->frame.linesize[0]];
583 memset(s->ham_buf, 0, s->planesize * 8);
584 for (plane = 0; plane < s->bpp; plane++) {
585 const uint8_t * start = buf + (plane * avctx->height + y) * s->planesize;
586 if (start >= buf_end)
588 decodeplane8(s->ham_buf, start, FFMIN(s->planesize, buf_end - start), plane);
590 decode_ham_plane32((uint32_t *) row, s->ham_buf, s->ham_palbuf, s->planesize);
593 return unsupported(avctx);
594 } else if (avctx->codec_tag == MKTAG('D','E','E','P')) {
595 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
596 int raw_width = avctx->width * (av_get_bits_per_pixel(desc) >> 3);
598 for(y = 0; y < avctx->height && buf < buf_end; y++ ) {
599 uint8_t *row = &s->frame.data[0][y * s->frame.linesize[0]];
600 memcpy(row, buf, FFMIN(raw_width, buf_end - buf));
602 if (avctx->pix_fmt == AV_PIX_FMT_BGR32) {
603 for(x = 0; x < avctx->width; x++)
604 row[4 * x + 3] = row[4 * x + 3] & 0xF0 | (row[4 * x + 3] >> 4);
607 } else if (avctx->codec_tag == MKTAG('I','L','B','M')) { // interleaved
608 if (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_PIX_FMT_GRAY8) {
609 for(y = 0; y < avctx->height; y++ ) {
610 uint8_t *row = &s->frame.data[0][ y*s->frame.linesize[0] ];
611 memset(row, 0, avctx->width);
612 for (plane = 0; plane < s->bpp && buf < buf_end; plane++) {
613 decodeplane8(row, buf, FFMIN(s->planesize, buf_end - buf), plane);
617 } else if (s->ham) { // HAM to AV_PIX_FMT_BGR32
618 for (y = 0; y < avctx->height; y++) {
619 uint8_t *row = &s->frame.data[0][ y*s->frame.linesize[0] ];
620 memset(s->ham_buf, 0, s->planesize * 8);
621 for (plane = 0; plane < s->bpp && buf < buf_end; plane++) {
622 decodeplane8(s->ham_buf, buf, FFMIN(s->planesize, buf_end - buf), plane);
625 decode_ham_plane32((uint32_t *) row, s->ham_buf, s->ham_palbuf, s->planesize);
627 } else { // AV_PIX_FMT_BGR32
628 for(y = 0; y < avctx->height; y++ ) {
629 uint8_t *row = &s->frame.data[0][y*s->frame.linesize[0]];
630 memset(row, 0, avctx->width << 2);
631 for (plane = 0; plane < s->bpp && buf < buf_end; plane++) {
632 decodeplane32((uint32_t *) row, buf, FFMIN(s->planesize, buf_end - buf), plane);
637 } else if (avctx->codec_tag == MKTAG('P','B','M',' ')) { // IFF-PBM
638 if (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_PIX_FMT_GRAY8) {
639 for(y = 0; y < avctx->height && buf_end > buf; y++ ) {
640 uint8_t *row = &s->frame.data[0][y * s->frame.linesize[0]];
641 memcpy(row, buf, FFMIN(avctx->width, buf_end - buf));
642 buf += avctx->width + (avctx->width % 2); // padding if odd
644 } else if (s->ham) { // IFF-PBM: HAM to AV_PIX_FMT_BGR32
645 for (y = 0; y < avctx->height && buf_end > buf; y++) {
646 uint8_t *row = &s->frame.data[0][ y*s->frame.linesize[0] ];
647 memcpy(s->ham_buf, buf, FFMIN(avctx->width, buf_end - buf));
648 buf += avctx->width + (avctx->width & 1); // padding if odd
649 decode_ham_plane32((uint32_t *) row, s->ham_buf, s->ham_palbuf, s->planesize);
652 return unsupported(avctx);
656 if (avctx->codec_tag == MKTAG('I','L','B','M')) { //interleaved
657 if (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_PIX_FMT_GRAY8) {
658 for(y = 0; y < avctx->height ; y++ ) {
659 uint8_t *row = &s->frame.data[0][ y*s->frame.linesize[0] ];
660 memset(row, 0, avctx->width);
661 for (plane = 0; plane < s->bpp; plane++) {
662 buf += decode_byterun(s->planebuf, s->planesize, buf, buf_end);
663 decodeplane8(row, s->planebuf, s->planesize, plane);
666 } else if (avctx->bits_per_coded_sample <= 8) { //8-bit (+ mask) to AV_PIX_FMT_BGR32
667 for (y = 0; y < avctx->height ; y++ ) {
668 uint8_t *row = &s->frame.data[0][y*s->frame.linesize[0]];
669 memset(s->mask_buf, 0, avctx->width * sizeof(uint32_t));
670 for (plane = 0; plane < s->bpp; plane++) {
671 buf += decode_byterun(s->planebuf, s->planesize, buf, buf_end);
672 decodeplane32(s->mask_buf, s->planebuf, s->planesize, plane);
674 lookup_pal_indicies((uint32_t *) row, s->mask_buf, s->mask_palbuf, avctx->width);
676 } else if (s->ham) { // HAM to AV_PIX_FMT_BGR32
677 for (y = 0; y < avctx->height ; y++) {
678 uint8_t *row = &s->frame.data[0][y*s->frame.linesize[0]];
679 memset(s->ham_buf, 0, s->planesize * 8);
680 for (plane = 0; plane < s->bpp; plane++) {
681 buf += decode_byterun(s->planebuf, s->planesize, buf, buf_end);
682 decodeplane8(s->ham_buf, s->planebuf, s->planesize, plane);
684 decode_ham_plane32((uint32_t *) row, s->ham_buf, s->ham_palbuf, s->planesize);
686 } else { //AV_PIX_FMT_BGR32
687 for(y = 0; y < avctx->height ; y++ ) {
688 uint8_t *row = &s->frame.data[0][y*s->frame.linesize[0]];
689 memset(row, 0, avctx->width << 2);
690 for (plane = 0; plane < s->bpp; plane++) {
691 buf += decode_byterun(s->planebuf, s->planesize, buf, buf_end);
692 decodeplane32((uint32_t *) row, s->planebuf, s->planesize, plane);
696 } else if (avctx->codec_tag == MKTAG('P','B','M',' ')) { // IFF-PBM
697 if (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_PIX_FMT_GRAY8) {
698 for(y = 0; y < avctx->height ; y++ ) {
699 uint8_t *row = &s->frame.data[0][y*s->frame.linesize[0]];
700 buf += decode_byterun(row, avctx->width, buf, buf_end);
702 } else if (s->ham) { // IFF-PBM: HAM to AV_PIX_FMT_BGR32
703 for (y = 0; y < avctx->height ; y++) {
704 uint8_t *row = &s->frame.data[0][y*s->frame.linesize[0]];
705 buf += decode_byterun(s->ham_buf, avctx->width, buf, buf_end);
706 decode_ham_plane32((uint32_t *) row, s->ham_buf, s->ham_palbuf, s->planesize);
709 return unsupported(avctx);
710 } else if (avctx->codec_tag == MKTAG('D','E','E','P')) { // IFF-DEEP
711 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
712 if (av_get_bits_per_pixel(desc) == 32)
713 decode_deep_rle32(s->frame.data[0], buf, buf_size, avctx->width, avctx->height, s->frame.linesize[0]);
715 return unsupported(avctx);
719 return unsupported(avctx);
722 *data_size = sizeof(AVFrame);
723 *(AVFrame*)data = s->frame;
727 static av_cold int decode_end(AVCodecContext *avctx)
729 IffContext *s = avctx->priv_data;
730 if (s->frame.data[0])
731 avctx->release_buffer(avctx, &s->frame);
732 av_freep(&s->planebuf);
733 av_freep(&s->ham_buf);
734 av_freep(&s->ham_palbuf);
738 #if CONFIG_IFF_ILBM_DECODER
739 AVCodec ff_iff_ilbm_decoder = {
741 .type = AVMEDIA_TYPE_VIDEO,
742 .id = AV_CODEC_ID_IFF_ILBM,
743 .priv_data_size = sizeof(IffContext),
746 .decode = decode_frame,
747 .capabilities = CODEC_CAP_DR1,
748 .long_name = NULL_IF_CONFIG_SMALL("IFF"),
751 #if CONFIG_IFF_BYTERUN1_DECODER
752 AVCodec ff_iff_byterun1_decoder = {
754 .type = AVMEDIA_TYPE_VIDEO,
755 .id = AV_CODEC_ID_IFF_BYTERUN1,
756 .priv_data_size = sizeof(IffContext),
759 .decode = decode_frame,
760 .capabilities = CODEC_CAP_DR1,
761 .long_name = NULL_IF_CONFIG_SMALL("IFF"),