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 "bytestream.h"
40 * Convert CMAP buffer (stored in extradata) to lavc palette format
42 int ff_cmap_read_palette(AVCodecContext *avctx, uint32_t *pal)
46 if (avctx->bits_per_coded_sample > 8) {
47 av_log(avctx, AV_LOG_ERROR, "bit_per_coded_sample > 8 not supported\n");
48 return AVERROR_INVALIDDATA;
51 count = 1 << avctx->bits_per_coded_sample;
52 if (avctx->extradata_size < count * 3) {
53 av_log(avctx, AV_LOG_ERROR, "palette data underflow\n");
54 return AVERROR_INVALIDDATA;
56 for (i=0; i < count; i++) {
57 pal[i] = 0xFF000000 | AV_RB24( avctx->extradata + i*3 );
62 static av_cold int decode_init(AVCodecContext *avctx)
64 IffContext *s = avctx->priv_data;
67 if (avctx->bits_per_coded_sample <= 8) {
68 avctx->pix_fmt = PIX_FMT_PAL8;
69 } else if (avctx->bits_per_coded_sample <= 32) {
70 avctx->pix_fmt = PIX_FMT_BGR32;
72 return AVERROR_INVALIDDATA;
75 s->planesize = avctx->width >> 3;
76 s->planebuf = av_malloc(s->planesize + FF_INPUT_BUFFER_PADDING_SIZE);
78 return AVERROR(ENOMEM);
80 s->frame.reference = 1;
81 if ((err = avctx->get_buffer(avctx, &s->frame) < 0)) {
82 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
86 return avctx->bits_per_coded_sample <= 8 ?
87 ff_cmap_read_palette(avctx, (uint32_t*)s->frame.data[1]) : 0;
91 * Decode interleaved plane buffer up to 8bpp
92 * @param dst Destination buffer
93 * @param buf Source buffer
95 * @param bps bits_per_coded_sample (must be <= 8)
96 * @param plane plane number to decode as
98 static void decodeplane8(uint8_t *dst, const uint8_t *const buf, int buf_size, int bps, int plane)
102 const unsigned b = (buf_size * 8) + bps - 1;
103 init_get_bits(&gb, buf, buf_size * 8);
104 for(i = 0; i < b; i++) {
105 dst[i] |= get_bits1(&gb) << plane;
110 * Decode interleaved plane buffer up to 24bpp
111 * @param dst Destination buffer
112 * @param buf Source buffer
114 * @param bps bits_per_coded_sample
115 * @param plane plane number to decode as
117 static void decodeplane32(uint32_t *dst, const uint8_t *const buf, int buf_size, int bps, int plane)
121 const unsigned b = (buf_size * 8) + bps - 1;
122 init_get_bits(&gb, buf, buf_size * 8);
123 for(i = 0; i < b; i++) {
124 dst[i] |= get_bits1(&gb) << plane;
128 static int decode_frame_ilbm(AVCodecContext *avctx,
129 void *data, int *data_size,
132 IffContext *s = avctx->priv_data;
133 const uint8_t *buf = avpkt->data;
134 unsigned buf_size = avpkt->size;
135 const uint8_t *buf_end = buf+buf_size;
138 if (avctx->reget_buffer(avctx, &s->frame) < 0){
139 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
143 for(y = 0; y < avctx->height; y++ ) {
144 uint8_t *row = &s->frame.data[0][ y*s->frame.linesize[0] ];
145 memset(row, 0, avctx->pix_fmt == PIX_FMT_PAL8 ? avctx->width : (avctx->width * 4));
146 for (plane = 0; plane < avctx->bits_per_coded_sample && buf < buf_end; plane++) {
147 if (avctx->pix_fmt == PIX_FMT_PAL8) {
148 decodeplane8(row, buf, FFMIN(s->planesize, buf_end - buf), avctx->bits_per_coded_sample, plane);
149 } else { // PIX_FMT_BGR32
150 decodeplane32((uint32_t *) row, buf, FFMIN(s->planesize, buf_end - buf), avctx->bits_per_coded_sample, plane);
156 *data_size = sizeof(AVFrame);
157 *(AVFrame*)data = s->frame;
161 static int decode_frame_byterun1(AVCodecContext *avctx,
162 void *data, int *data_size,
165 IffContext *s = avctx->priv_data;
166 const uint8_t *buf = avpkt->data;
167 unsigned buf_size = avpkt->size;
168 const uint8_t *buf_end = buf+buf_size;
169 unsigned y, plane, x;
171 if (avctx->reget_buffer(avctx, &s->frame) < 0){
172 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
176 for(y = 0; y < avctx->height ; y++ ) {
177 uint8_t *row = &s->frame.data[0][ y*s->frame.linesize[0] ];
178 if (avctx->codec_tag == MKTAG('I','L','B','M')) { //interleaved
179 memset(row, 0, avctx->pix_fmt == PIX_FMT_PAL8 ? avctx->width : (avctx->width * 4));
180 for (plane = 0; plane < avctx->bits_per_coded_sample; plane++) {
181 for(x = 0; x < s->planesize && buf < buf_end; ) {
182 int8_t value = *buf++;
186 memcpy(s->planebuf + x, buf, FFMIN3(length, s->planesize - x, buf_end - buf));
188 } else if (value > -128) {
190 memset(s->planebuf + x, *buf++, FFMIN(length, s->planesize - x));
196 if (avctx->pix_fmt == PIX_FMT_PAL8) {
197 decodeplane8(row, s->planebuf, s->planesize, avctx->bits_per_coded_sample, plane);
198 } else { //PIX_FMT_BGR32
199 decodeplane32((uint32_t *) row, s->planebuf, s->planesize, avctx->bits_per_coded_sample, plane);
203 for(x = 0; x < avctx->width && buf < buf_end; ) {
204 int8_t value = *buf++;
208 memcpy(row + x, buf, FFMIN3(length, buf_end - buf, avctx->width - x));
210 } else if (value > -128) {
212 memset(row + x, *buf++, FFMIN(length, avctx->width - x));
221 *data_size = sizeof(AVFrame);
222 *(AVFrame*)data = s->frame;
226 static av_cold int decode_end(AVCodecContext *avctx)
228 IffContext *s = avctx->priv_data;
229 if (s->frame.data[0])
230 avctx->release_buffer(avctx, &s->frame);
231 av_freep(&s->planebuf);
235 AVCodec iff_ilbm_decoder = {
245 .long_name = NULL_IF_CONFIG_SMALL("IFF ILBM"),
248 AVCodec iff_byterun1_decoder = {
251 CODEC_ID_IFF_BYTERUN1,
256 decode_frame_byterun1,
258 .long_name = NULL_IF_CONFIG_SMALL("IFF ByteRun1"),