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 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 uint64_t v = AV_RN64A(dst) | lut[*buf++];
378 } while (--buf_size);
382 * Decode interleaved plane buffer up to 24bpp
383 * @param dst Destination buffer
384 * @param buf Source buffer
386 * @param plane plane number to decode as
388 static void decodeplane32(uint32_t *dst, const uint8_t *buf, int buf_size, int plane)
390 const uint32_t *lut = plane32_lut[plane];
392 unsigned mask = (*buf >> 2) & ~3;
393 dst[0] |= lut[mask++];
394 dst[1] |= lut[mask++];
395 dst[2] |= lut[mask++];
397 mask = (*buf++ << 2) & 0x3F;
398 dst[4] |= lut[mask++];
399 dst[5] |= lut[mask++];
400 dst[6] |= lut[mask++];
403 } while (--buf_size);
406 #define DECODE_HAM_PLANE32(x) \
407 first = buf[x] << 1; \
408 second = buf[(x)+1] << 1; \
409 delta &= pal[first++]; \
410 delta |= pal[first]; \
412 delta &= pal[second++]; \
413 delta |= pal[second]; \
417 * Converts one line of HAM6/8-encoded chunky buffer to 24bpp.
419 * @param dst the destination 24bpp buffer
420 * @param buf the source 8bpp chunky buffer
421 * @param pal the HAM decode table
422 * @param buf_size the plane size in bytes
424 static void decode_ham_plane32(uint32_t *dst, const uint8_t *buf,
425 const uint32_t *const pal, unsigned buf_size)
429 uint32_t first, second;
430 DECODE_HAM_PLANE32(0);
431 DECODE_HAM_PLANE32(2);
432 DECODE_HAM_PLANE32(4);
433 DECODE_HAM_PLANE32(6);
436 } while (--buf_size);
439 static void lookup_pal_indicies(uint32_t *dst, const uint32_t *buf,
440 const uint32_t *const pal, unsigned width)
443 *dst++ = pal[*buf++];
448 * Decode one complete byterun1 encoded line.
450 * @param dst the destination buffer where to store decompressed bitstream
451 * @param dst_size the destination plane size in bytes
452 * @param buf the source byterun1 compressed bitstream
453 * @param buf_end the EOF of source byterun1 compressed bitstream
454 * @return number of consumed bytes in byterun1 compressed bitstream
456 static int decode_byterun(uint8_t *dst, int dst_size,
457 const uint8_t *buf, const uint8_t *const buf_end) {
458 const uint8_t *const buf_start = buf;
460 for (x = 0; x < dst_size && buf < buf_end;) {
462 const int8_t value = *buf++;
465 memcpy(dst + x, buf, FFMIN3(length, dst_size - x, buf_end - buf));
467 } else if (value > -128) {
469 memset(dst + x, *buf++, FFMIN(length, dst_size - x));
475 return buf - buf_start;
478 static int decode_frame_ilbm(AVCodecContext *avctx,
479 void *data, int *data_size,
482 IffContext *s = avctx->priv_data;
483 const uint8_t *buf = avpkt->size >= 2 ? avpkt->data + AV_RB16(avpkt->data) : NULL;
484 const int buf_size = avpkt->size >= 2 ? avpkt->size - AV_RB16(avpkt->data) : 0;
485 const uint8_t *buf_end = buf+buf_size;
488 if ((res = extract_header(avctx, avpkt)) < 0)
492 if ((res = avctx->reget_buffer(avctx, &s->frame)) < 0) {
493 av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
496 } else if ((res = avctx->get_buffer(avctx, &s->frame)) < 0) {
497 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
499 } else if (avctx->bits_per_coded_sample <= 8 && avctx->pix_fmt == AV_PIX_FMT_PAL8) {
500 if ((res = ff_cmap_read_palette(avctx, (uint32_t*)s->frame.data[1])) < 0)
505 if (avctx->codec_tag == MKTAG('A','C','B','M')) {
506 if (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_PIX_FMT_GRAY8) {
507 memset(s->frame.data[0], 0, avctx->height * s->frame.linesize[0]);
508 for (plane = 0; plane < s->bpp; plane++) {
509 for(y = 0; y < avctx->height && buf < buf_end; y++ ) {
510 uint8_t *row = &s->frame.data[0][ y*s->frame.linesize[0] ];
511 decodeplane8(row, buf, FFMIN(s->planesize, buf_end - buf), plane);
515 } else if (s->ham) { // HAM to AV_PIX_FMT_BGR32
516 memset(s->frame.data[0], 0, avctx->height * s->frame.linesize[0]);
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; plane++) {
521 const uint8_t * start = buf + (plane * avctx->height + y) * s->planesize;
522 if (start >= buf_end)
524 decodeplane8(s->ham_buf, start, FFMIN(s->planesize, buf_end - start), plane);
526 decode_ham_plane32((uint32_t *) row, s->ham_buf, s->ham_palbuf, s->planesize);
529 } else if (avctx->codec_tag == MKTAG('D','E','E','P')) {
530 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
531 int raw_width = avctx->width * (av_get_bits_per_pixel(desc) >> 3);
533 for(y = 0; y < avctx->height && buf < buf_end; y++ ) {
534 uint8_t *row = &s->frame.data[0][y * s->frame.linesize[0]];
535 memcpy(row, buf, FFMIN(raw_width, buf_end - buf));
537 if (avctx->pix_fmt == AV_PIX_FMT_BGR32) {
538 for(x = 0; x < avctx->width; x++)
539 row[4 * x + 3] = row[4 * x + 3] & 0xF0 | (row[4 * x + 3] >> 4);
542 } else if (avctx->codec_tag == MKTAG('I','L','B','M')) { // interleaved
543 if (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_PIX_FMT_GRAY8) {
544 for(y = 0; y < avctx->height; y++ ) {
545 uint8_t *row = &s->frame.data[0][ y*s->frame.linesize[0] ];
546 memset(row, 0, avctx->width);
547 for (plane = 0; plane < s->bpp && buf < buf_end; plane++) {
548 decodeplane8(row, buf, FFMIN(s->planesize, buf_end - buf), plane);
552 } else if (s->ham) { // HAM to AV_PIX_FMT_BGR32
553 for (y = 0; y < avctx->height; y++) {
554 uint8_t *row = &s->frame.data[0][ y*s->frame.linesize[0] ];
555 memset(s->ham_buf, 0, s->planesize * 8);
556 for (plane = 0; plane < s->bpp && buf < buf_end; plane++) {
557 decodeplane8(s->ham_buf, buf, FFMIN(s->planesize, buf_end - buf), plane);
560 decode_ham_plane32((uint32_t *) row, s->ham_buf, s->ham_palbuf, s->planesize);
562 } else { // AV_PIX_FMT_BGR32
563 for(y = 0; y < avctx->height; y++ ) {
564 uint8_t *row = &s->frame.data[0][y*s->frame.linesize[0]];
565 memset(row, 0, avctx->width << 2);
566 for (plane = 0; plane < s->bpp && buf < buf_end; plane++) {
567 decodeplane32((uint32_t *) row, buf, FFMIN(s->planesize, buf_end - buf), plane);
572 } else if (avctx->codec_tag == MKTAG('P','B','M',' ')) { // IFF-PBM
573 if (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_PIX_FMT_GRAY8) {
574 for(y = 0; y < avctx->height; y++ ) {
575 uint8_t *row = &s->frame.data[0][y * s->frame.linesize[0]];
576 memcpy(row, buf, FFMIN(avctx->width, buf_end - buf));
577 buf += avctx->width + (avctx->width % 2); // padding if odd
579 } else if (s->ham) { // IFF-PBM: HAM to AV_PIX_FMT_BGR32
580 for (y = 0; y < avctx->height; y++) {
581 uint8_t *row = &s->frame.data[0][ y*s->frame.linesize[0] ];
582 memcpy(s->ham_buf, buf, FFMIN(avctx->width, buf_end - buf));
583 buf += avctx->width + (avctx->width & 1); // padding if odd
584 decode_ham_plane32((uint32_t *) row, s->ham_buf, s->ham_palbuf, s->planesize);
587 av_log_ask_for_sample(avctx, "unsupported bpp\n");
588 return AVERROR_INVALIDDATA;
592 *data_size = sizeof(AVFrame);
593 *(AVFrame*)data = s->frame;
597 static int decode_frame_byterun1(AVCodecContext *avctx,
598 void *data, int *data_size,
601 IffContext *s = avctx->priv_data;
602 const uint8_t *buf = avpkt->size >= 2 ? avpkt->data + AV_RB16(avpkt->data) : NULL;
603 const int buf_size = avpkt->size >= 2 ? avpkt->size - AV_RB16(avpkt->data) : 0;
604 const uint8_t *buf_end = buf+buf_size;
607 if ((res = extract_header(avctx, avpkt)) < 0)
610 if ((res = avctx->reget_buffer(avctx, &s->frame)) < 0) {
611 av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
614 } else if ((res = avctx->get_buffer(avctx, &s->frame)) < 0) {
615 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
617 } else if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {
618 if ((res = ff_cmap_read_palette(avctx, (uint32_t*)s->frame.data[1])) < 0)
620 } else if (avctx->pix_fmt == AV_PIX_FMT_RGB32 && avctx->bits_per_coded_sample <= 8) {
621 if ((res = ff_cmap_read_palette(avctx, s->mask_palbuf)) < 0)
626 if (avctx->codec_tag == MKTAG('I','L','B','M')) { //interleaved
627 if (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_PIX_FMT_GRAY8) {
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);
631 for (plane = 0; plane < s->bpp; plane++) {
632 buf += decode_byterun(s->planebuf, s->planesize, buf, buf_end);
633 decodeplane8(row, s->planebuf, s->planesize, plane);
636 } else if (avctx->bits_per_coded_sample <= 8) { //8-bit (+ mask) to AV_PIX_FMT_BGR32
637 for (y = 0; y < avctx->height ; y++ ) {
638 uint8_t *row = &s->frame.data[0][y*s->frame.linesize[0]];
639 memset(s->mask_buf, 0, avctx->width * sizeof(uint32_t));
640 for (plane = 0; plane < s->bpp; plane++) {
641 buf += decode_byterun(s->planebuf, s->planesize, buf, buf_end);
642 decodeplane32(s->mask_buf, s->planebuf, s->planesize, plane);
644 lookup_pal_indicies((uint32_t *) row, s->mask_buf, s->mask_palbuf, avctx->width);
646 } else if (s->ham) { // HAM to AV_PIX_FMT_BGR32
647 for (y = 0; y < avctx->height ; y++) {
648 uint8_t *row = &s->frame.data[0][y*s->frame.linesize[0]];
649 memset(s->ham_buf, 0, s->planesize * 8);
650 for (plane = 0; plane < s->bpp; plane++) {
651 buf += decode_byterun(s->planebuf, s->planesize, buf, buf_end);
652 decodeplane8(s->ham_buf, s->planebuf, s->planesize, plane);
654 decode_ham_plane32((uint32_t *) row, s->ham_buf, s->ham_palbuf, s->planesize);
656 } else { //AV_PIX_FMT_BGR32
657 for(y = 0; y < avctx->height ; y++ ) {
658 uint8_t *row = &s->frame.data[0][y*s->frame.linesize[0]];
659 memset(row, 0, avctx->width << 2);
660 for (plane = 0; plane < s->bpp; plane++) {
661 buf += decode_byterun(s->planebuf, s->planesize, buf, buf_end);
662 decodeplane32((uint32_t *) row, s->planebuf, s->planesize, plane);
666 } else if (avctx->codec_tag == MKTAG('P','B','M',' ')) { // IFF-PBM
667 if (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_PIX_FMT_GRAY8) {
668 for(y = 0; y < avctx->height ; y++ ) {
669 uint8_t *row = &s->frame.data[0][y*s->frame.linesize[0]];
670 buf += decode_byterun(row, avctx->width, buf, buf_end);
672 } else if (s->ham) { // IFF-PBM: HAM to AV_PIX_FMT_BGR32
673 for (y = 0; y < avctx->height ; y++) {
674 uint8_t *row = &s->frame.data[0][y*s->frame.linesize[0]];
675 buf += decode_byterun(s->ham_buf, avctx->width, buf, buf_end);
676 decode_ham_plane32((uint32_t *) row, s->ham_buf, s->ham_palbuf, s->planesize);
679 av_log_ask_for_sample(avctx, "unsupported bpp\n");
680 return AVERROR_INVALIDDATA;
684 *data_size = sizeof(AVFrame);
685 *(AVFrame*)data = s->frame;
689 static av_cold int decode_end(AVCodecContext *avctx)
691 IffContext *s = avctx->priv_data;
692 if (s->frame.data[0])
693 avctx->release_buffer(avctx, &s->frame);
694 av_freep(&s->planebuf);
695 av_freep(&s->ham_buf);
696 av_freep(&s->ham_palbuf);
700 #if CONFIG_IFF_ILBM_DECODER
701 AVCodec ff_iff_ilbm_decoder = {
703 .type = AVMEDIA_TYPE_VIDEO,
704 .id = AV_CODEC_ID_IFF_ILBM,
705 .priv_data_size = sizeof(IffContext),
708 .decode = decode_frame_ilbm,
709 .capabilities = CODEC_CAP_DR1,
710 .long_name = NULL_IF_CONFIG_SMALL("IFF ILBM"),
713 #if CONFIG_IFF_BYTERUN1_DECODER
714 AVCodec ff_iff_byterun1_decoder = {
715 .name = "iff_byterun1",
716 .type = AVMEDIA_TYPE_VIDEO,
717 .id = AV_CODEC_ID_IFF_BYTERUN1,
718 .priv_data_size = sizeof(IffContext),
721 .decode = decode_frame_byterun1,
722 .capabilities = CODEC_CAP_DR1,
723 .long_name = NULL_IF_CONFIG_SMALL("IFF ByteRun1"),