/*
* IFF PBM/ILBM bitmap decoder
* Copyright (c) 2010 Peter Ross <pross@xvid.org>
+ * Copyright (c) 2010 Sebastian Vater <cdgs.basty@googlemail.com>
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
* IFF PBM/ILBM bitmap decoder
*/
+#include "libavutil/imgutils.h"
#include "bytestream.h"
#include "avcodec.h"
#include "get_bits.h"
-#include "iff.h"
typedef struct {
AVFrame frame;
int planesize;
uint8_t * planebuf;
+ int init; // 1 if buffer and palette data already initialized, 0 otherwise
} IffContext;
+#define LUT8_PART(plane, v) \
+ AV_LE2NE64C(UINT64_C(0x0000000)<<32 | v) << plane, \
+ AV_LE2NE64C(UINT64_C(0x1000000)<<32 | v) << plane, \
+ AV_LE2NE64C(UINT64_C(0x0010000)<<32 | v) << plane, \
+ AV_LE2NE64C(UINT64_C(0x1010000)<<32 | v) << plane, \
+ AV_LE2NE64C(UINT64_C(0x0000100)<<32 | v) << plane, \
+ AV_LE2NE64C(UINT64_C(0x1000100)<<32 | v) << plane, \
+ AV_LE2NE64C(UINT64_C(0x0010100)<<32 | v) << plane, \
+ AV_LE2NE64C(UINT64_C(0x1010100)<<32 | v) << plane, \
+ AV_LE2NE64C(UINT64_C(0x0000001)<<32 | v) << plane, \
+ AV_LE2NE64C(UINT64_C(0x1000001)<<32 | v) << plane, \
+ AV_LE2NE64C(UINT64_C(0x0010001)<<32 | v) << plane, \
+ AV_LE2NE64C(UINT64_C(0x1010001)<<32 | v) << plane, \
+ AV_LE2NE64C(UINT64_C(0x0000101)<<32 | v) << plane, \
+ AV_LE2NE64C(UINT64_C(0x1000101)<<32 | v) << plane, \
+ AV_LE2NE64C(UINT64_C(0x0010101)<<32 | v) << plane, \
+ AV_LE2NE64C(UINT64_C(0x1010101)<<32 | v) << plane
+
+#define LUT8(plane) { \
+ LUT8_PART(plane, 0x0000000), \
+ LUT8_PART(plane, 0x1000000), \
+ LUT8_PART(plane, 0x0010000), \
+ LUT8_PART(plane, 0x1010000), \
+ LUT8_PART(plane, 0x0000100), \
+ LUT8_PART(plane, 0x1000100), \
+ LUT8_PART(plane, 0x0010100), \
+ LUT8_PART(plane, 0x1010100), \
+ LUT8_PART(plane, 0x0000001), \
+ LUT8_PART(plane, 0x1000001), \
+ LUT8_PART(plane, 0x0010001), \
+ LUT8_PART(plane, 0x1010001), \
+ LUT8_PART(plane, 0x0000101), \
+ LUT8_PART(plane, 0x1000101), \
+ LUT8_PART(plane, 0x0010101), \
+ LUT8_PART(plane, 0x1010101), \
+}
+
+// 8 planes * 8-bit mask
+static const uint64_t plane8_lut[8][256] = {
+ LUT8(0), LUT8(1), LUT8(2), LUT8(3),
+ LUT8(4), LUT8(5), LUT8(6), LUT8(7),
+};
+
+#define LUT32(plane) { \
+ 0, 0, 0, 0, \
+ 0, 0, 0, 1 << plane, \
+ 0, 0, 1 << plane, 0, \
+ 0, 0, 1 << plane, 1 << plane, \
+ 0, 1 << plane, 0, 0, \
+ 0, 1 << plane, 0, 1 << plane, \
+ 0, 1 << plane, 1 << plane, 0, \
+ 0, 1 << plane, 1 << plane, 1 << plane, \
+ 1 << plane, 0, 0, 0, \
+ 1 << plane, 0, 0, 1 << plane, \
+ 1 << plane, 0, 1 << plane, 0, \
+ 1 << plane, 0, 1 << plane, 1 << plane, \
+ 1 << plane, 1 << plane, 0, 0, \
+ 1 << plane, 1 << plane, 0, 1 << plane, \
+ 1 << plane, 1 << plane, 1 << plane, 0, \
+ 1 << plane, 1 << plane, 1 << plane, 1 << plane, \
+}
+
+// 32 planes * 4-bit mask * 4 lookup tables each
+static const uint32_t plane32_lut[32][16*4] = {
+ LUT32( 0), LUT32( 1), LUT32( 2), LUT32( 3),
+ LUT32( 4), LUT32( 5), LUT32( 6), LUT32( 7),
+ LUT32( 8), LUT32( 9), LUT32(10), LUT32(11),
+ LUT32(12), LUT32(13), LUT32(14), LUT32(15),
+ LUT32(16), LUT32(17), LUT32(18), LUT32(19),
+ LUT32(20), LUT32(21), LUT32(22), LUT32(23),
+ LUT32(24), LUT32(25), LUT32(26), LUT32(27),
+ LUT32(28), LUT32(29), LUT32(30), LUT32(31),
+};
+
+// Gray to RGB, required for palette table of grayscale images with bpp < 8
+static av_always_inline uint32_t gray2rgb(const uint32_t x) {
+ return x << 16 | x << 8 | x;
+}
+
/**
* Convert CMAP buffer (stored in extradata) to lavc palette format
*/
-int ff_cmap_read_palette(AVCodecContext *avctx, uint32_t *pal)
+static int ff_cmap_read_palette(AVCodecContext *avctx, uint32_t *pal)
{
int count, i;
}
count = 1 << avctx->bits_per_coded_sample;
- if (avctx->extradata_size < count * 3) {
- av_log(avctx, AV_LOG_ERROR, "palette data underflow\n");
- return AVERROR_INVALIDDATA;
- }
- for (i=0; i < count; i++) {
- pal[i] = 0xFF000000 | AV_RB24( avctx->extradata + i*3 );
+ // If extradata is smaller than actually needed, fill the remaining with black.
+ count = FFMIN(avctx->extradata_size / 3, count);
+ if (count) {
+ for (i=0; i < count; i++) {
+ pal[i] = 0xFF000000 | AV_RB24( avctx->extradata + i*3 );
+ }
+ } else { // Create gray-scale color palette for bps < 8
+ count = 1 << avctx->bits_per_coded_sample;
+
+ for (i=0; i < count; i++) {
+ pal[i] = 0xFF000000 | gray2rgb((i * 255) >> avctx->bits_per_coded_sample);
+ }
}
return 0;
}
int err;
if (avctx->bits_per_coded_sample <= 8) {
- avctx->pix_fmt = PIX_FMT_PAL8;
+ avctx->pix_fmt = (avctx->bits_per_coded_sample < 8 ||
+ avctx->extradata_size) ? PIX_FMT_PAL8
+ : PIX_FMT_GRAY8;
} else if (avctx->bits_per_coded_sample <= 32) {
avctx->pix_fmt = PIX_FMT_BGR32;
} else {
return AVERROR_INVALIDDATA;
}
- s->planesize = avctx->width / 8;
+ if ((err = av_image_check_size(avctx->width, avctx->height, 0, avctx)))
+ return err;
+ s->planesize = FFALIGN(avctx->width, 16) >> 3; // Align plane size in bits to word-boundary
s->planebuf = av_malloc(s->planesize + FF_INPUT_BUFFER_PADDING_SIZE);
if (!s->planebuf)
return AVERROR(ENOMEM);
s->frame.reference = 1;
- if ((err = avctx->get_buffer(avctx, &s->frame) < 0)) {
- av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
- return err;
- }
- return avctx->bits_per_coded_sample <= 8 ?
- ff_cmap_read_palette(avctx, (uint32_t*)s->frame.data[1]) : 0;
+ return 0;
}
/**
* @param dst Destination buffer
* @param buf Source buffer
* @param buf_size
- * @param bps bits_per_coded_sample (must be <= 8)
* @param plane plane number to decode as
*/
-static void decodeplane8(uint8_t *dst, const uint8_t *const buf, int buf_size, int bps, int plane)
+static void decodeplane8(uint8_t *dst, const uint8_t *buf, int buf_size, int plane)
{
- GetBitContext gb;
- int i, b;
- init_get_bits(&gb, buf, buf_size * 8);
- for(i = 0; i < (buf_size * 8 + bps - 1) / bps; i++) {
- for (b = 0; b < bps; b++) {
- dst[ i*bps + b ] |= get_bits1(&gb) << plane;
- }
- }
+ const uint64_t *lut = plane8_lut[plane];
+ do {
+ uint64_t v = AV_RN64A(dst) | lut[*buf++];
+ AV_WN64A(dst, v);
+ dst += 8;
+ } while (--buf_size);
}
/**
* @param dst Destination buffer
* @param buf Source buffer
* @param buf_size
- * @param bps bits_per_coded_sample
* @param plane plane number to decode as
*/
-static void decodeplane32(uint32_t *dst, const uint8_t *const buf, int buf_size, int bps, int plane)
+static void decodeplane32(uint32_t *dst, const uint8_t *buf, int buf_size, int plane)
{
- GetBitContext gb;
- int i, b;
- init_get_bits(&gb, buf, buf_size * 8);
- for(i = 0; i < (buf_size * 8 + bps - 1) / bps; i++) {
- for (b = 0; b < bps; b++) {
- dst[ i*bps + b ] |= get_bits1(&gb) << plane;
+ const uint32_t *lut = plane32_lut[plane];
+ do {
+ unsigned mask = (*buf >> 2) & ~3;
+ dst[0] |= lut[mask++];
+ dst[1] |= lut[mask++];
+ dst[2] |= lut[mask++];
+ dst[3] |= lut[mask];
+ mask = (*buf++ << 2) & 0x3F;
+ dst[4] |= lut[mask++];
+ dst[5] |= lut[mask++];
+ dst[6] |= lut[mask++];
+ dst[7] |= lut[mask];
+ dst += 8;
+ } while (--buf_size);
+}
+
+/**
+ * Decode one complete byterun1 encoded line.
+ *
+ * @param dst the destination buffer where to store decompressed bitstream
+ * @param dst_size the destination plane size in bytes
+ * @param buf the source byterun1 compressed bitstream
+ * @param buf_end the EOF of source byterun1 compressed bitstream
+ * @return number of consumed bytes in byterun1 compressed bitstream
+*/
+static int decode_byterun(uint8_t *dst, int dst_size,
+ const uint8_t *buf, const uint8_t *const buf_end) {
+ const uint8_t *const buf_start = buf;
+ unsigned x;
+ for (x = 0; x < dst_size && buf < buf_end;) {
+ unsigned length;
+ const int8_t value = *buf++;
+ if (value >= 0) {
+ length = value + 1;
+ memcpy(dst + x, buf, FFMIN3(length, dst_size - x, buf_end - buf));
+ buf += length;
+ } else if (value > -128) {
+ length = -value + 1;
+ memset(dst + x, *buf++, FFMIN(length, dst_size - x));
+ } else { // noop
+ continue;
}
+ x += length;
}
+ return buf - buf_start;
}
static int decode_frame_ilbm(AVCodecContext *avctx,
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
const uint8_t *buf_end = buf+buf_size;
- int y, plane;
+ int y, plane, res;
- if (avctx->reget_buffer(avctx, &s->frame) < 0){
+ if (s->init) {
+ if ((res = avctx->reget_buffer(avctx, &s->frame)) < 0) {
+ av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
+ return res;
+ }
+ } else if ((res = avctx->get_buffer(avctx, &s->frame)) < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
- return -1;
+ return res;
+ } else if (avctx->bits_per_coded_sample <= 8 && avctx->pix_fmt != PIX_FMT_GRAY8) {
+ if ((res = ff_cmap_read_palette(avctx, (uint32_t*)s->frame.data[1])) < 0)
+ return res;
}
+ s->init = 1;
- for(y = 0; y < avctx->height; y++ ) {
- uint8_t *row = &s->frame.data[0][ y*s->frame.linesize[0] ];
- memset(row, 0, avctx->pix_fmt == PIX_FMT_PAL8 ? avctx->width : (avctx->width * 4));
- for (plane = 0; plane < avctx->bits_per_coded_sample && buf < buf_end; plane++) {
- if (avctx->pix_fmt == PIX_FMT_PAL8) {
- decodeplane8(row, buf, FFMIN(s->planesize, buf_end - buf), avctx->bits_per_coded_sample, plane);
- } else { // PIX_FMT_BGR32
- decodeplane32(row, buf, FFMIN(s->planesize, buf_end - buf), avctx->bits_per_coded_sample, plane);
+ if (avctx->codec_tag == MKTAG('I','L','B','M')) { // interleaved
+ if (avctx->pix_fmt == PIX_FMT_PAL8 || avctx->pix_fmt == PIX_FMT_GRAY8) {
+ for(y = 0; y < avctx->height; y++ ) {
+ uint8_t *row = &s->frame.data[0][ y*s->frame.linesize[0] ];
+ memset(row, 0, avctx->width);
+ for (plane = 0; plane < avctx->bits_per_coded_sample && buf < buf_end; plane++) {
+ decodeplane8(row, buf, FFMIN(s->planesize, buf_end - buf), plane);
+ buf += s->planesize;
+ }
}
- buf += s->planesize;
+ } else { // PIX_FMT_BGR32
+ for(y = 0; y < avctx->height; y++ ) {
+ uint8_t *row = &s->frame.data[0][y*s->frame.linesize[0]];
+ memset(row, 0, avctx->width << 2);
+ for (plane = 0; plane < avctx->bits_per_coded_sample && buf < buf_end; plane++) {
+ decodeplane32((uint32_t *) row, buf, FFMIN(s->planesize, buf_end - buf), plane);
+ buf += s->planesize;
+ }
+ }
+ }
+ } else if (avctx->pix_fmt == PIX_FMT_PAL8 || avctx->pix_fmt == PIX_FMT_GRAY8) { // IFF-PBM
+ for(y = 0; y < avctx->height; y++ ) {
+ uint8_t *row = &s->frame.data[0][y * s->frame.linesize[0]];
+ memcpy(row, buf, FFMIN(avctx->width, buf_end - buf));
+ buf += avctx->width + (avctx->width % 2); // padding if odd
}
}
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
const uint8_t *buf_end = buf+buf_size;
- int y, plane, x;
+ int y, plane, res;
- if (avctx->reget_buffer(avctx, &s->frame) < 0){
+ if (s->init) {
+ if ((res = avctx->reget_buffer(avctx, &s->frame)) < 0) {
+ av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
+ return res;
+ }
+ } else if ((res = avctx->get_buffer(avctx, &s->frame)) < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
- return -1;
+ return res;
+ } else if (avctx->bits_per_coded_sample <= 8 && avctx->pix_fmt != PIX_FMT_GRAY8) {
+ if ((res = ff_cmap_read_palette(avctx, (uint32_t*)s->frame.data[1])) < 0)
+ return res;
}
+ s->init = 1;
- for(y = 0; y < avctx->height ; y++ ) {
- uint8_t *row = &s->frame.data[0][ y*s->frame.linesize[0] ];
- if (avctx->codec_tag == MKTAG('I','L','B','M')) { //interleaved
- memset(row, 0, avctx->pix_fmt == PIX_FMT_PAL8 ? avctx->width : (avctx->width * 4));
- for (plane = 0; plane < avctx->bits_per_coded_sample; plane++) {
- for(x = 0; x < s->planesize && buf < buf_end; ) {
- int8_t value = *buf++;
- int length;
- if (value >= 0) {
- length = value + 1;
- memcpy(s->planebuf + x, buf, FFMIN3(length, s->planesize - x, buf_end - buf));
- buf += length;
- } else if (value > -128) {
- length = -value + 1;
- memset(s->planebuf + x, *buf++, FFMIN(length, s->planesize - x));
- } else { //noop
- continue;
- }
- x += length;
- }
- if (avctx->pix_fmt == PIX_FMT_PAL8) {
- decodeplane8(row, s->planebuf, s->planesize, avctx->bits_per_coded_sample, plane);
- } else { //PIX_FMT_BGR32
- decodeplane32(row, s->planebuf, s->planesize, avctx->bits_per_coded_sample, plane);
+ if (avctx->codec_tag == MKTAG('I','L','B','M')) { //interleaved
+ if (avctx->pix_fmt == PIX_FMT_PAL8 || avctx->pix_fmt == PIX_FMT_GRAY8) {
+ for(y = 0; y < avctx->height ; y++ ) {
+ uint8_t *row = &s->frame.data[0][ y*s->frame.linesize[0] ];
+ memset(row, 0, avctx->width);
+ for (plane = 0; plane < avctx->bits_per_coded_sample; plane++) {
+ buf += decode_byterun(s->planebuf, s->planesize, buf, buf_end);
+ decodeplane8(row, s->planebuf, s->planesize, plane);
}
}
- } else {
- for(x = 0; x < avctx->width && buf < buf_end; ) {
- int8_t value = *buf++;
- int length;
- if (value >= 0) {
- length = value + 1;
- memcpy(row + x, buf, FFMIN3(length, buf_end - buf, avctx->width - x));
- buf += length;
- } else if (value > -128) {
- length = -value + 1;
- memset(row + x, *buf++, FFMIN(length, avctx->width - x));
- } else { //noop
- continue;
+ } else { //PIX_FMT_BGR32
+ for(y = 0; y < avctx->height ; y++ ) {
+ uint8_t *row = &s->frame.data[0][y*s->frame.linesize[0]];
+ memset(row, 0, avctx->width << 2);
+ for (plane = 0; plane < avctx->bits_per_coded_sample; plane++) {
+ buf += decode_byterun(s->planebuf, s->planesize, buf, buf_end);
+ decodeplane32((uint32_t *) row, s->planebuf, s->planesize, plane);
}
- x += length;
}
}
+ } else {
+ for(y = 0; y < avctx->height ; y++ ) {
+ uint8_t *row = &s->frame.data[0][y*s->frame.linesize[0]];
+ buf += decode_byterun(row, avctx->width, buf, buf_end);
+ }
}
*data_size = sizeof(AVFrame);
return 0;
}
-AVCodec iff_ilbm_decoder = {
- "iff_ilbm",
- AVMEDIA_TYPE_VIDEO,
- CODEC_ID_IFF_ILBM,
- sizeof(IffContext),
- decode_init,
- NULL,
- decode_end,
- decode_frame_ilbm,
- CODEC_CAP_DR1,
- .long_name = NULL_IF_CONFIG_SMALL("IFF ILBM"),
+AVCodec ff_iff_ilbm_decoder = {
+ .name = "iff_ilbm",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = CODEC_ID_IFF_ILBM,
+ .priv_data_size = sizeof(IffContext),
+ .init = decode_init,
+ .close = decode_end,
+ .decode = decode_frame_ilbm,
+ .capabilities = CODEC_CAP_DR1,
+ .long_name = NULL_IF_CONFIG_SMALL("IFF ILBM"),
};
-AVCodec iff_byterun1_decoder = {
- "iff_byterun1",
- AVMEDIA_TYPE_VIDEO,
- CODEC_ID_IFF_BYTERUN1,
- sizeof(IffContext),
- decode_init,
- NULL,
- decode_end,
- decode_frame_byterun1,
- CODEC_CAP_DR1,
- .long_name = NULL_IF_CONFIG_SMALL("IFF ByteRun1"),
+AVCodec ff_iff_byterun1_decoder = {
+ .name = "iff_byterun1",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = CODEC_ID_IFF_BYTERUN1,
+ .priv_data_size = sizeof(IffContext),
+ .init = decode_init,
+ .close = decode_end,
+ .decode = decode_frame_byterun1,
+ .capabilities = CODEC_CAP_DR1,
+ .long_name = NULL_IF_CONFIG_SMALL("IFF ByteRun1"),
};
projects / ffmpeg / blobdiff