* IFF PBM/ILBM bitmap decoder
*/
+#include "libavcore/imgutils.h"
#include "bytestream.h"
#include "avcodec.h"
#include "get_bits.h"
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_LE2ME64C(UINT64_C(0x0000000)<<32 | v) << plane, \
- AV_LE2ME64C(UINT64_C(0x1000000)<<32 | v) << plane, \
- AV_LE2ME64C(UINT64_C(0x0010000)<<32 | v) << plane, \
- AV_LE2ME64C(UINT64_C(0x1010000)<<32 | v) << plane, \
- AV_LE2ME64C(UINT64_C(0x0000100)<<32 | v) << plane, \
- AV_LE2ME64C(UINT64_C(0x1000100)<<32 | v) << plane, \
- AV_LE2ME64C(UINT64_C(0x0010100)<<32 | v) << plane, \
- AV_LE2ME64C(UINT64_C(0x1010100)<<32 | v) << plane, \
- AV_LE2ME64C(UINT64_C(0x0000001)<<32 | v) << plane, \
- AV_LE2ME64C(UINT64_C(0x1000001)<<32 | v) << plane, \
- AV_LE2ME64C(UINT64_C(0x0010001)<<32 | v) << plane, \
- AV_LE2ME64C(UINT64_C(0x1010001)<<32 | v) << plane, \
- AV_LE2ME64C(UINT64_C(0x0000101)<<32 | v) << plane, \
- AV_LE2ME64C(UINT64_C(0x1000101)<<32 | v) << plane, \
- AV_LE2ME64C(UINT64_C(0x0010101)<<32 | v) << plane, \
- AV_LE2ME64C(UINT64_C(0x1010101)<<32 | v) << plane
+ 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), \
return AVERROR_INVALIDDATA;
}
- if ((err = avcodec_check_dimensions(avctx, avctx->width, avctx->height)))
+ 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);
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 &&
- avctx->pix_fmt != PIX_FMT_GRAY8) ?
- ff_cmap_read_palette(avctx, (uint32_t*)s->frame.data[1]) : 0;
+ return 0;
}
/**
} 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,
void *data, int *data_size,
AVPacket *avpkt)
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;
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]];
memcpy(row, buf, FFMIN(avctx->width, buf_end - buf));
- buf += avctx->width;
+ 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;
if (avctx->codec_tag == MKTAG('I','L','B','M')) { //interleaved
if (avctx->pix_fmt == PIX_FMT_PAL8 || avctx->pix_fmt == PIX_FMT_GRAY8) {
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++) {
- for(x = 0; x < s->planesize && buf < buf_end; ) {
- int8_t value = *buf++;
- unsigned 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;
- }
+ buf += decode_byterun(s->planebuf, s->planesize, buf, buf_end);
decodeplane8(row, s->planebuf, s->planesize, plane);
}
}
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++) {
- for(x = 0; x < s->planesize && buf < buf_end; ) {
- int8_t value = *buf++;
- unsigned 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;
- }
+ buf += decode_byterun(s->planebuf, s->planesize, buf, buf_end);
decodeplane32((uint32_t *) row, s->planebuf, s->planesize, plane);
}
}
} else {
for(y = 0; y < avctx->height ; y++ ) {
uint8_t *row = &s->frame.data[0][y*s->frame.linesize[0]];
- for(x = 0; x < avctx->width && buf < buf_end; ) {
- int8_t value = *buf++;
- unsigned 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;
- }
- x += length;
- }
+ buf += decode_byterun(row, avctx->width, buf, buf_end);
}
}
projects / ffmpeg / blobdiff