/*
- * IFF PBM/ILBM bitmap decoder
+ * IFF ACBM/DEEP/ILBM/PBM bitmap decoder
* Copyright (c) 2010 Peter Ross <pross@xvid.org>
* Copyright (c) 2010 Sebastian Vater <cdgs.basty@googlemail.com>
*
/**
* @file
- * IFF PBM/ILBM bitmap decoder
+ * IFF ACBM/DEEP/ILBM/PBM bitmap decoder
*/
#include "libavutil/imgutils.h"
#include "bytestream.h"
#include "avcodec.h"
#include "get_bits.h"
+#include "internal.h"
// TODO: masking bits
typedef enum {
unsigned transparency; ///< TODO: transparency color index in palette
unsigned masking; ///< TODO: masking method used
int init; // 1 if buffer and palette data already initialized, 0 otherwise
+ int16_t tvdc[16]; ///< TVDC lookup table
} IffContext;
#define LUT8_PART(plane, v) \
const uint8_t *buf;
unsigned buf_size;
IffContext *s = avctx->priv_data;
- int palette_size;
+ int i, palette_size;
if (avctx->extradata_size < 2) {
av_log(avctx, AV_LOG_ERROR, "not enough extradata\n");
}
}
- if (buf_size > 8) {
+ if (buf_size >= 41) {
s->compression = bytestream_get_byte(&buf);
s->bpp = bytestream_get_byte(&buf);
s->ham = bytestream_get_byte(&buf);
s->flags = bytestream_get_byte(&buf);
s->transparency = bytestream_get_be16(&buf);
s->masking = bytestream_get_byte(&buf);
+ for (i = 0; i < 16; i++)
+ s->tvdc[i] = bytestream_get_be16(&buf);
+
if (s->masking == MASK_HAS_MASK) {
if (s->bpp >= 8 && !s->ham) {
avctx->pix_fmt = AV_PIX_FMT_RGB32;
avctx->pix_fmt = (avctx->bits_per_coded_sample < 8) ||
(avctx->extradata_size >= 2 && palette_size) ? AV_PIX_FMT_PAL8 : AV_PIX_FMT_GRAY8;
} else if (avctx->bits_per_coded_sample <= 32) {
- if (avctx->codec_tag != MKTAG('D','E','E','P')) {
+ if (avctx->codec_tag == MKTAG('R','G','B','8')) {
+ avctx->pix_fmt = AV_PIX_FMT_RGB32;
+ } else if (avctx->codec_tag == MKTAG('R','G','B','N')) {
+ avctx->pix_fmt = AV_PIX_FMT_RGB444;
+ } else if (avctx->codec_tag != MKTAG('D','E','E','P')) {
if (avctx->bits_per_coded_sample == 24) {
avctx->pix_fmt = AV_PIX_FMT_RGB0;
} else if (avctx->bits_per_coded_sample == 32) {
return buf - buf_start;
}
+#define DECODE_RGBX_COMMON(pixel_size) \
+ if (!length) { \
+ length = bytestream2_get_byte(gb); \
+ if (!length) { \
+ length = bytestream2_get_be16(gb); \
+ if (!length) \
+ return; \
+ } \
+ } \
+ for (i = 0; i < length; i++) { \
+ *(uint32_t *)(dst + y*linesize + x * pixel_size) = pixel; \
+ x += 1; \
+ if (x >= width) { \
+ y += 1; \
+ if (y >= height) \
+ return; \
+ x = 0; \
+ } \
+ }
+
+/**
+ * Decode RGB8 buffer
+ * @param[out] dst Destination buffer
+ * @param width Width of destination buffer (pixels)
+ * @param height Height of destination buffer (pixels)
+ * @param linesize Line size of destination buffer (bytes)
+ */
+static void decode_rgb8(GetByteContext *gb, uint8_t *dst, int width, int height, int linesize)
+{
+ int x = 0, y = 0, i, length;
+ while (bytestream2_get_bytes_left(gb) >= 4) {
+ uint32_t pixel = 0xFF000000 | bytestream2_get_be24(gb);
+ length = bytestream2_get_byte(gb) & 0x7F;
+ DECODE_RGBX_COMMON(4)
+ }
+}
+
+/**
+ * Decode RGBN buffer
+ * @param[out] dst Destination buffer
+ * @param width Width of destination buffer (pixels)
+ * @param height Height of destination buffer (pixels)
+ * @param linesize Line size of destination buffer (bytes)
+ */
+static void decode_rgbn(GetByteContext *gb, uint8_t *dst, int width, int height, int linesize)
+{
+ int x = 0, y = 0, i, length;
+ while (bytestream2_get_bytes_left(gb) >= 2) {
+ uint32_t pixel = bytestream2_get_be16u(gb);
+ length = pixel & 0x7;
+ pixel >>= 4;
+ DECODE_RGBX_COMMON(2)
+ }
+}
+
/**
* Decode DEEP RLE 32-bit buffer
* @param[out] dst Destination buffer
}
}
+/**
+ * Decode DEEP TVDC 32-bit buffer
+ * @param[out] dst Destination buffer
+ * @param[in] src Source buffer
+ * @param src_size Source buffer size (bytes)
+ * @param width Width of destination buffer (pixels)
+ * @param height Height of destination buffer (pixels)
+ * @param linesize Line size of destination buffer (bytes)
+ * @param[int] tvdc TVDC lookup table
+ */
+static void decode_deep_tvdc32(uint8_t *dst, const uint8_t *src, int src_size, int width, int height, int linesize, const int16_t *tvdc)
+{
+ int x = 0, y = 0, plane = 0;
+ int8_t pixel = 0;
+ int i, j;
+
+ for (i = 0; i < src_size * 2;) {
+#define GETNIBBLE ((i & 1) ? (src[i>>1] & 0xF) : (src[i>>1] >> 4))
+ int d = tvdc[GETNIBBLE];
+ i++;
+ if (d) {
+ pixel += d;
+ dst[y * linesize + x*4 + plane] = pixel;
+ x++;
+ } else {
+ if (i >= src_size * 2)
+ return;
+ d = GETNIBBLE + 1;
+ i++;
+ d = FFMIN(d, width - x);
+ for (j = 0; j < d; j++) {
+ dst[y * linesize + x*4 + plane] = pixel;
+ x++;
+ }
+ }
+ if (x >= width) {
+ plane++;
+ if (plane >= 4) {
+ y++;
+ if (y >= height)
+ return;
+ plane = 0;
+ }
+ x = 0;
+ pixel = 0;
+ i = (i + 1) & ~1;
+ }
+ }
+}
+
static int unsupported(AVCodecContext *avctx)
{
IffContext *s = avctx->priv_data;
}
static int decode_frame(AVCodecContext *avctx,
- void *data, int *data_size,
+ void *data, int *got_frame,
AVPacket *avpkt)
{
IffContext *s = avctx->priv_data;
const int buf_size = avpkt->size >= 2 ? avpkt->size - AV_RB16(avpkt->data) : 0;
const uint8_t *buf_end = buf+buf_size;
int y, plane, res;
+ GetByteContext gb;
if ((res = extract_header(avctx, avpkt)) < 0)
return res;
av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
return res;
}
- } else if ((res = avctx->get_buffer(avctx, &s->frame)) < 0) {
+ } else if ((res = ff_get_buffer(avctx, &s->frame)) < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return res;
} else if (avctx->bits_per_coded_sample <= 8 && avctx->pix_fmt == AV_PIX_FMT_PAL8) {
return unsupported(avctx);
}
break;
+ case 4:
+ bytestream2_init(&gb, buf, buf_size);
+ if (avctx->codec_tag == MKTAG('R','G','B','8'))
+ decode_rgb8(&gb, s->frame.data[0], avctx->width, avctx->height, s->frame.linesize[0]);
+ else if (avctx->codec_tag == MKTAG('R','G','B','N'))
+ decode_rgbn(&gb, s->frame.data[0], avctx->width, avctx->height, s->frame.linesize[0]);
+ else
+ return unsupported(avctx);
+ break;
+ case 5:
+ if (avctx->codec_tag == MKTAG('D','E','E','P')) {
+ const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
+ if (av_get_bits_per_pixel(desc) == 32)
+ decode_deep_tvdc32(s->frame.data[0], buf, buf_size, avctx->width, avctx->height, s->frame.linesize[0], s->tvdc);
+ else
+ return unsupported(avctx);
+ } else
+ return unsupported(avctx);
+ break;
default:
return unsupported(avctx);
}
- *data_size = sizeof(AVFrame);
+ *got_frame = 1;
*(AVFrame*)data = s->frame;
return buf_size;
}
projects / ffmpeg / blobdiff