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, "bit_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;
194 int palette_size = avctx->extradata_size - AV_RB16(avctx->extradata);
199 return AVERROR_INVALIDDATA;
200 image_size = avpkt->size - AV_RB16(avpkt->data);
202 buf_size = bytestream_get_be16(&buf);
203 if (buf_size <= 1 || image_size <= 1) {
204 av_log(avctx, AV_LOG_ERROR,
205 "Invalid image size received: %u -> image data offset: %d\n",
206 buf_size, image_size);
207 return AVERROR_INVALIDDATA;
210 if (avctx->extradata_size < 2)
211 return AVERROR_INVALIDDATA;
212 buf = avctx->extradata;
213 buf_size = bytestream_get_be16(&buf);
214 if (buf_size <= 1 || palette_size < 0) {
215 av_log(avctx, AV_LOG_ERROR,
216 "Invalid palette size received: %u -> palette data offset: %d\n",
217 buf_size, palette_size);
218 return AVERROR_INVALIDDATA;
223 s->compression = bytestream_get_byte(&buf);
224 s->bpp = bytestream_get_byte(&buf);
225 s->ham = bytestream_get_byte(&buf);
226 s->flags = bytestream_get_byte(&buf);
227 s->transparency = bytestream_get_be16(&buf);
228 s->masking = bytestream_get_byte(&buf);
229 if (s->masking == MASK_HAS_MASK) {
231 avctx->pix_fmt = PIX_FMT_RGB32;
232 av_freep(&s->mask_buf);
233 av_freep(&s->mask_palbuf);
234 s->mask_buf = av_malloc((s->planesize * 32) + FF_INPUT_BUFFER_PADDING_SIZE);
236 return AVERROR(ENOMEM);
237 s->mask_palbuf = av_malloc((2 << s->bpp) * sizeof(uint32_t) + FF_INPUT_BUFFER_PADDING_SIZE);
238 if (!s->mask_palbuf) {
239 av_freep(&s->mask_buf);
240 return AVERROR(ENOMEM);
244 } else if (s->masking != MASK_NONE && s->masking != MASK_HAS_TRANSPARENT_COLOR) {
245 av_log(avctx, AV_LOG_ERROR, "Masking not supported\n");
246 return AVERROR_PATCHWELCOME;
248 if (!s->bpp || s->bpp > 32) {
249 av_log(avctx, AV_LOG_ERROR, "Invalid number of bitplanes: %u\n", s->bpp);
250 return AVERROR_INVALIDDATA;
251 } else if (s->ham >= 8) {
252 av_log(avctx, AV_LOG_ERROR, "Invalid number of hold bits for HAM: %u\n", s->ham);
253 return AVERROR_INVALIDDATA;
256 av_freep(&s->ham_buf);
257 av_freep(&s->ham_palbuf);
260 int i, count = FFMIN(palette_size / 3, 1 << s->ham);
262 const uint8_t *const palette = avctx->extradata + AV_RB16(avctx->extradata);
264 s->ham_buf = av_malloc((s->planesize * 8) + FF_INPUT_BUFFER_PADDING_SIZE);
266 return AVERROR(ENOMEM);
268 ham_count = 8 * (1 << s->ham);
269 s->ham_palbuf = av_malloc((ham_count << !!(s->masking == MASK_HAS_MASK)) * sizeof (uint32_t) + FF_INPUT_BUFFER_PADDING_SIZE);
270 if (!s->ham_palbuf) {
271 av_freep(&s->ham_buf);
272 return AVERROR(ENOMEM);
275 if (count) { // HAM with color palette attached
276 // prefill with black and palette and set HAM take direct value mask to zero
277 memset(s->ham_palbuf, 0, (1 << s->ham) * 2 * sizeof (uint32_t));
278 for (i=0; i < count; i++) {
279 s->ham_palbuf[i*2+1] = AV_RL24(palette + i*3);
282 } else { // HAM with grayscale color palette
284 for (i=0; i < count; i++) {
285 s->ham_palbuf[i*2] = 0; // take direct color value from palette
286 s->ham_palbuf[i*2+1] = av_le2ne32(gray2rgb((i * 255) >> s->ham));
289 for (i=0; i < count; i++) {
290 uint32_t tmp = i << (8 - s->ham);
291 tmp |= tmp >> s->ham;
292 s->ham_palbuf[(i+count)*2] = 0x00FFFF; // just modify blue color component
293 s->ham_palbuf[(i+count*2)*2] = 0xFFFF00; // just modify red color component
294 s->ham_palbuf[(i+count*3)*2] = 0xFF00FF; // just modify green color component
295 s->ham_palbuf[(i+count)*2+1] = tmp << 16;
296 s->ham_palbuf[(i+count*2)*2+1] = tmp;
297 s->ham_palbuf[(i+count*3)*2+1] = tmp << 8;
299 if (s->masking == MASK_HAS_MASK) {
300 for (i = 0; i < ham_count; i++)
301 s->ham_palbuf[(1 << s->bpp) + i] = s->ham_palbuf[i] | 0xFF000000;
309 static av_cold int decode_init(AVCodecContext *avctx)
311 IffContext *s = avctx->priv_data;
314 if (avctx->bits_per_coded_sample <= 8) {
315 int palette_size = avctx->extradata_size - AV_RB16(avctx->extradata);
316 avctx->pix_fmt = (avctx->bits_per_coded_sample < 8) ||
317 (avctx->extradata_size >= 2 && palette_size) ? PIX_FMT_PAL8 : PIX_FMT_GRAY8;
318 } else if (avctx->bits_per_coded_sample <= 32) {
319 avctx->pix_fmt = PIX_FMT_BGR32;
321 return AVERROR_INVALIDDATA;
324 if ((err = av_image_check_size(avctx->width, avctx->height, 0, avctx)))
326 s->planesize = FFALIGN(avctx->width, 16) >> 3; // Align plane size in bits to word-boundary
327 s->planebuf = av_malloc(s->planesize + FF_INPUT_BUFFER_PADDING_SIZE);
329 return AVERROR(ENOMEM);
331 s->bpp = avctx->bits_per_coded_sample;
332 avcodec_get_frame_defaults(&s->frame);
334 if ((err = extract_header(avctx, NULL)) < 0)
336 s->frame.reference = 3;
342 * Decode interleaved plane buffer up to 8bpp
343 * @param dst Destination buffer
344 * @param buf Source buffer
346 * @param plane plane number to decode as
348 static void decodeplane8(uint8_t *dst, const uint8_t *buf, int buf_size, int plane)
350 const uint64_t *lut = plane8_lut[plane];
352 uint64_t v = AV_RN64A(dst) | lut[*buf++];
355 } while (--buf_size);
359 * Decode interleaved plane buffer up to 24bpp
360 * @param dst Destination buffer
361 * @param buf Source buffer
363 * @param plane plane number to decode as
365 static void decodeplane32(uint32_t *dst, const uint8_t *buf, int buf_size, int plane)
367 const uint32_t *lut = plane32_lut[plane];
369 unsigned mask = (*buf >> 2) & ~3;
370 dst[0] |= lut[mask++];
371 dst[1] |= lut[mask++];
372 dst[2] |= lut[mask++];
374 mask = (*buf++ << 2) & 0x3F;
375 dst[4] |= lut[mask++];
376 dst[5] |= lut[mask++];
377 dst[6] |= lut[mask++];
380 } while (--buf_size);
383 #define DECODE_HAM_PLANE32(x) \
384 first = buf[x] << 1; \
385 second = buf[(x)+1] << 1; \
386 delta &= pal[first++]; \
387 delta |= pal[first]; \
389 delta &= pal[second++]; \
390 delta |= pal[second]; \
394 * Converts one line of HAM6/8-encoded chunky buffer to 24bpp.
396 * @param dst the destination 24bpp buffer
397 * @param buf the source 8bpp chunky buffer
398 * @param pal the HAM decode table
399 * @param buf_size the plane size in bytes
401 static void decode_ham_plane32(uint32_t *dst, const uint8_t *buf,
402 const uint32_t *const pal, unsigned buf_size)
406 uint32_t first, second;
407 DECODE_HAM_PLANE32(0);
408 DECODE_HAM_PLANE32(2);
409 DECODE_HAM_PLANE32(4);
410 DECODE_HAM_PLANE32(6);
413 } while (--buf_size);
416 static void lookup_pal_indicies(uint32_t *dst, const uint32_t *buf,
417 const uint32_t *const pal, unsigned width)
420 *dst++ = pal[*buf++];
425 * Decode one complete byterun1 encoded line.
427 * @param dst the destination buffer where to store decompressed bitstream
428 * @param dst_size the destination plane size in bytes
429 * @param buf the source byterun1 compressed bitstream
430 * @param buf_end the EOF of source byterun1 compressed bitstream
431 * @return number of consumed bytes in byterun1 compressed bitstream
433 static int decode_byterun(uint8_t *dst, int dst_size,
434 const uint8_t *buf, const uint8_t *const buf_end) {
435 const uint8_t *const buf_start = buf;
437 for (x = 0; x < dst_size && buf < buf_end;) {
439 const int8_t value = *buf++;
442 memcpy(dst + x, buf, FFMIN3(length, dst_size - x, buf_end - buf));
444 } else if (value > -128) {
446 memset(dst + x, *buf++, FFMIN(length, dst_size - x));
452 return buf - buf_start;
455 static int decode_frame_ilbm(AVCodecContext *avctx,
456 void *data, int *data_size,
459 IffContext *s = avctx->priv_data;
460 const uint8_t *buf = avpkt->size >= 2 ? avpkt->data + AV_RB16(avpkt->data) : NULL;
461 const int buf_size = avpkt->size >= 2 ? avpkt->size - AV_RB16(avpkt->data) : 0;
462 const uint8_t *buf_end = buf+buf_size;
465 if ((res = extract_header(avctx, avpkt)) < 0)
469 if ((res = avctx->reget_buffer(avctx, &s->frame)) < 0) {
470 av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
473 } else if ((res = avctx->get_buffer(avctx, &s->frame)) < 0) {
474 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
476 } else if (avctx->bits_per_coded_sample <= 8 && avctx->pix_fmt != PIX_FMT_GRAY8) {
477 if ((res = ff_cmap_read_palette(avctx, (uint32_t*)s->frame.data[1])) < 0)
482 if (avctx->codec_tag == MKTAG('A','C','B','M')) {
483 if (avctx->pix_fmt == PIX_FMT_PAL8 || avctx->pix_fmt == PIX_FMT_GRAY8) {
484 memset(s->frame.data[0], 0, avctx->height * s->frame.linesize[0]);
485 for (plane = 0; plane < s->bpp; plane++) {
486 for(y = 0; y < avctx->height && buf < buf_end; y++ ) {
487 uint8_t *row = &s->frame.data[0][ y*s->frame.linesize[0] ];
488 decodeplane8(row, buf, FFMIN(s->planesize, buf_end - buf), plane);
492 } else if (s->ham) { // HAM to PIX_FMT_BGR32
493 memset(s->frame.data[0], 0, avctx->height * s->frame.linesize[0]);
494 for(y = 0; y < avctx->height; y++) {
495 uint8_t *row = &s->frame.data[0][y * s->frame.linesize[0]];
496 memset(s->ham_buf, 0, s->planesize * 8);
497 for (plane = 0; plane < s->bpp; plane++) {
498 const uint8_t * start = buf + (plane * avctx->height + y) * s->planesize;
499 if (start >= buf_end)
501 decodeplane8(s->ham_buf, start, FFMIN(s->planesize, buf_end - start), plane);
503 decode_ham_plane32((uint32_t *) row, s->ham_buf, s->ham_palbuf, s->planesize);
506 } else if (avctx->codec_tag == MKTAG('I','L','B','M')) { // interleaved
507 if (avctx->pix_fmt == PIX_FMT_PAL8 || avctx->pix_fmt == PIX_FMT_GRAY8) {
508 for(y = 0; y < avctx->height; y++ ) {
509 uint8_t *row = &s->frame.data[0][ y*s->frame.linesize[0] ];
510 memset(row, 0, avctx->width);
511 for (plane = 0; plane < s->bpp && buf < buf_end; plane++) {
512 decodeplane8(row, buf, FFMIN(s->planesize, buf_end - buf), plane);
516 } else if (s->ham) { // HAM to PIX_FMT_BGR32
517 for (y = 0; y < avctx->height; y++) {
518 uint8_t *row = &s->frame.data[0][ y*s->frame.linesize[0] ];
519 memset(s->ham_buf, 0, s->planesize * 8);
520 for (plane = 0; plane < s->bpp && buf < buf_end; plane++) {
521 decodeplane8(s->ham_buf, buf, FFMIN(s->planesize, buf_end - buf), plane);
524 decode_ham_plane32((uint32_t *) row, s->ham_buf, s->ham_palbuf, s->planesize);
526 } else { // PIX_FMT_BGR32
527 for(y = 0; y < avctx->height; y++ ) {
528 uint8_t *row = &s->frame.data[0][y*s->frame.linesize[0]];
529 memset(row, 0, avctx->width << 2);
530 for (plane = 0; plane < s->bpp && buf < buf_end; plane++) {
531 decodeplane32((uint32_t *) row, buf, FFMIN(s->planesize, buf_end - buf), plane);
536 } else if (avctx->pix_fmt == PIX_FMT_PAL8 || avctx->pix_fmt == PIX_FMT_GRAY8) { // IFF-PBM
537 for(y = 0; y < avctx->height; y++ ) {
538 uint8_t *row = &s->frame.data[0][y * s->frame.linesize[0]];
539 memcpy(row, buf, FFMIN(avctx->width, buf_end - buf));
540 buf += avctx->width + (avctx->width % 2); // padding if odd
542 } else { // IFF-PBM: HAM to PIX_FMT_BGR32
543 for (y = 0; y < avctx->height; y++) {
544 uint8_t *row = &s->frame.data[0][ y*s->frame.linesize[0] ];
545 memcpy(s->ham_buf, buf, FFMIN(avctx->width, buf_end - buf));
546 buf += avctx->width + (avctx->width & 1); // padding if odd
547 decode_ham_plane32((uint32_t *) row, s->ham_buf, s->ham_palbuf, s->planesize);
551 *data_size = sizeof(AVFrame);
552 *(AVFrame*)data = s->frame;
556 static int decode_frame_byterun1(AVCodecContext *avctx,
557 void *data, int *data_size,
560 IffContext *s = avctx->priv_data;
561 const uint8_t *buf = avpkt->size >= 2 ? avpkt->data + AV_RB16(avpkt->data) : NULL;
562 const int buf_size = avpkt->size >= 2 ? avpkt->size - AV_RB16(avpkt->data) : 0;
563 const uint8_t *buf_end = buf+buf_size;
566 if ((res = extract_header(avctx, avpkt)) < 0)
569 if ((res = avctx->reget_buffer(avctx, &s->frame)) < 0) {
570 av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
573 } else if ((res = avctx->get_buffer(avctx, &s->frame)) < 0) {
574 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
576 } else if (avctx->pix_fmt == PIX_FMT_PAL8) {
577 if ((res = ff_cmap_read_palette(avctx, (uint32_t*)s->frame.data[1])) < 0)
579 } else if (avctx->pix_fmt == PIX_FMT_RGB32 && avctx->bits_per_coded_sample <= 8) {
580 if ((res = ff_cmap_read_palette(avctx, s->mask_palbuf)) < 0)
585 if (avctx->codec_tag == MKTAG('I','L','B','M')) { //interleaved
586 if (avctx->pix_fmt == PIX_FMT_PAL8 || avctx->pix_fmt == PIX_FMT_GRAY8) {
587 for(y = 0; y < avctx->height ; y++ ) {
588 uint8_t *row = &s->frame.data[0][ y*s->frame.linesize[0] ];
589 memset(row, 0, avctx->width);
590 for (plane = 0; plane < s->bpp; plane++) {
591 buf += decode_byterun(s->planebuf, s->planesize, buf, buf_end);
592 decodeplane8(row, s->planebuf, s->planesize, plane);
595 } else if (avctx->bits_per_coded_sample <= 8) { //8-bit (+ mask) to PIX_FMT_BGR32
596 for (y = 0; y < avctx->height ; y++ ) {
597 uint8_t *row = &s->frame.data[0][y*s->frame.linesize[0]];
598 memset(s->mask_buf, 0, avctx->width * sizeof(uint32_t));
599 for (plane = 0; plane < s->bpp; plane++) {
600 buf += decode_byterun(s->planebuf, s->planesize, buf, buf_end);
601 decodeplane32(s->mask_buf, s->planebuf, s->planesize, plane);
603 lookup_pal_indicies((uint32_t *) row, s->mask_buf, s->mask_palbuf, avctx->width);
605 } else if (s->ham) { // HAM to PIX_FMT_BGR32
606 for (y = 0; y < avctx->height ; y++) {
607 uint8_t *row = &s->frame.data[0][y*s->frame.linesize[0]];
608 memset(s->ham_buf, 0, s->planesize * 8);
609 for (plane = 0; plane < s->bpp; plane++) {
610 buf += decode_byterun(s->planebuf, s->planesize, buf, buf_end);
611 decodeplane8(s->ham_buf, s->planebuf, s->planesize, plane);
613 decode_ham_plane32((uint32_t *) row, s->ham_buf, s->ham_palbuf, s->planesize);
615 } else { //PIX_FMT_BGR32
616 for(y = 0; y < avctx->height ; y++ ) {
617 uint8_t *row = &s->frame.data[0][y*s->frame.linesize[0]];
618 memset(row, 0, avctx->width << 2);
619 for (plane = 0; plane < s->bpp; plane++) {
620 buf += decode_byterun(s->planebuf, s->planesize, buf, buf_end);
621 decodeplane32((uint32_t *) row, s->planebuf, s->planesize, plane);
625 } else if (avctx->pix_fmt == PIX_FMT_PAL8 || avctx->pix_fmt == PIX_FMT_GRAY8) { // IFF-PBM
626 for(y = 0; y < avctx->height ; y++ ) {
627 uint8_t *row = &s->frame.data[0][y*s->frame.linesize[0]];
628 buf += decode_byterun(row, avctx->width, buf, buf_end);
630 } else { // IFF-PBM: HAM to PIX_FMT_BGR32
631 for (y = 0; y < avctx->height ; y++) {
632 uint8_t *row = &s->frame.data[0][y*s->frame.linesize[0]];
633 buf += decode_byterun(s->ham_buf, avctx->width, buf, buf_end);
634 decode_ham_plane32((uint32_t *) row, s->ham_buf, s->ham_palbuf, s->planesize);
638 *data_size = sizeof(AVFrame);
639 *(AVFrame*)data = s->frame;
643 static av_cold int decode_end(AVCodecContext *avctx)
645 IffContext *s = avctx->priv_data;
646 if (s->frame.data[0])
647 avctx->release_buffer(avctx, &s->frame);
648 av_freep(&s->planebuf);
649 av_freep(&s->ham_buf);
650 av_freep(&s->ham_palbuf);
654 AVCodec ff_iff_ilbm_decoder = {
656 .type = AVMEDIA_TYPE_VIDEO,
657 .id = CODEC_ID_IFF_ILBM,
658 .priv_data_size = sizeof(IffContext),
661 .decode = decode_frame_ilbm,
662 .capabilities = CODEC_CAP_DR1,
663 .long_name = NULL_IF_CONFIG_SMALL("IFF ILBM"),
666 AVCodec ff_iff_byterun1_decoder = {
667 .name = "iff_byterun1",
668 .type = AVMEDIA_TYPE_VIDEO,
669 .id = CODEC_ID_IFF_BYTERUN1,
670 .priv_data_size = sizeof(IffContext),
673 .decode = decode_frame_byterun1,
674 .capabilities = CODEC_CAP_DR1,
675 .long_name = NULL_IF_CONFIG_SMALL("IFF ByteRun1"),