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iff: support masking plane feature 

Fixes ticket 705.

Reported-by: ami-stuff
Signed-off-by: Peter Ross <pross@xvid.org>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
tags/n0.10
Peter Ross Michael Niedermayer 13 years ago
parent
73da4fd520
commit
69224582da
1 changed files with 54 additions and 4 deletions
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  1. +54
    -4
      libavcodec/iff.c

+ 54
- 4
libavcodec/iff.c View File

@@ -44,6 +44,8 @@ typedef struct {
uint8_t * planebuf;
uint8_t * ham_buf; ///< temporary buffer for planar to chunky conversation
uint32_t *ham_palbuf; ///< HAM decode table
uint32_t *mask_buf; ///< temporary buffer for palette indices
uint32_t *mask_palbuf; ///< masking palette table
unsigned compression; ///< delta compression method used
unsigned bpp; ///< bits per plane to decode (differs from bits_per_coded_sample if HAM)
unsigned ham; ///< 0 if non-HAM or number of hold bits (6 for bpp > 6, 4 otherwise)
@@ -157,6 +159,7 @@ static int ff_cmap_read_palette(AVCodecContext *avctx, uint32_t *pal)
if (s->flags && count >= 32) { // EHB
for (i = 0; i < 32; i++)
pal[i + 32] = 0xFF000000 | (AV_RB24(palette + i*3) & 0xFEFEFE) >> 1;
count = FFMAX(count, 64);
}
} else { // Create gray-scale color palette for bps < 8
count = 1 << avctx->bits_per_coded_sample;
@@ -165,7 +168,11 @@ static int ff_cmap_read_palette(AVCodecContext *avctx, uint32_t *pal)
pal[i] = 0xFF000000 | gray2rgb((i * 255) >> avctx->bits_per_coded_sample);
}
}
if (s->masking == MASK_HAS_TRANSPARENT_COLOR &&
if (s->masking == MASK_HAS_MASK) {
memcpy(pal + (1 << avctx->bits_per_coded_sample), pal, count * 4);
for (i = 0; i < count; i++)
pal[i] &= 0xFFFFFF;
} else if (s->masking == MASK_HAS_TRANSPARENT_COLOR &&
s->transparency < 1 << avctx->bits_per_coded_sample)
pal[s->transparency] &= 0xFFFFFF;
return 0;
@@ -219,7 +226,22 @@ static int extract_header(AVCodecContext *const avctx,
s->flags = bytestream_get_byte(&buf);
s->transparency = bytestream_get_be16(&buf);
s->masking = bytestream_get_byte(&buf);
if (s->masking != MASK_NONE && s->masking != MASK_HAS_TRANSPARENT_COLOR) {
if (s->masking == MASK_HAS_MASK) {
if (s->bpp >= 8) {
avctx->pix_fmt = PIX_FMT_RGB32;
av_freep(&s->mask_buf);
av_freep(&s->mask_palbuf);
s->mask_buf = av_malloc((s->planesize * 32) + FF_INPUT_BUFFER_PADDING_SIZE);
if (!s->mask_buf)
return AVERROR(ENOMEM);
s->mask_palbuf = av_malloc((2 << s->bpp) * sizeof(uint32_t) + FF_INPUT_BUFFER_PADDING_SIZE);
if (!s->mask_palbuf) {
av_freep(&s->mask_buf);
return AVERROR(ENOMEM);
}
}
s->bpp++;
} else if (s->masking != MASK_NONE && s->masking != MASK_HAS_TRANSPARENT_COLOR) {
av_log(avctx, AV_LOG_ERROR, "Masking not supported\n");
return AVERROR_PATCHWELCOME;
}
@@ -236,12 +258,15 @@ static int extract_header(AVCodecContext *const avctx,

if (s->ham) {
int i, count = FFMIN(palette_size / 3, 1 << s->ham);
int ham_count;
const uint8_t *const palette = avctx->extradata + AV_RB16(avctx->extradata);

s->ham_buf = av_malloc((s->planesize * 8) + FF_INPUT_BUFFER_PADDING_SIZE);
if (!s->ham_buf)
return AVERROR(ENOMEM);

s->ham_palbuf = av_malloc((8 * (1 << s->ham) * sizeof (uint32_t)) + FF_INPUT_BUFFER_PADDING_SIZE);
ham_count = 8 * (1 << s->ham);
s->ham_palbuf = av_malloc((ham_count << !!(s->masking == MASK_HAS_MASK)) * sizeof (uint32_t) + FF_INPUT_BUFFER_PADDING_SIZE);
if (!s->ham_palbuf) {
av_freep(&s->ham_buf);
return AVERROR(ENOMEM);
@@ -271,6 +296,10 @@ static int extract_header(AVCodecContext *const avctx,
s->ham_palbuf[(i+count*2)*2+1] = tmp;
s->ham_palbuf[(i+count*3)*2+1] = tmp << 8;
}
if (s->masking == MASK_HAS_MASK) {
for (i = 0; i < ham_count; i++)
s->ham_palbuf[(1 << s->bpp) + i] = s->ham_palbuf[i] | 0xFF000000;
}
}
}

@@ -384,6 +413,14 @@ static void decode_ham_plane32(uint32_t *dst, const uint8_t *buf,
} while (--buf_size);
}

static void lookup_pal_indicies(uint32_t *dst, const uint32_t *buf,
const uint32_t *const pal, unsigned width)
{
do {
*dst++ = pal[*buf++];
} while (--width);
}

/**
* Decode one complete byterun1 encoded line.
*
@@ -536,9 +573,12 @@ static int decode_frame_byterun1(AVCodecContext *avctx,
} else if ((res = avctx->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 != PIX_FMT_GRAY8) {
} else if (avctx->pix_fmt == PIX_FMT_PAL8) {
if ((res = ff_cmap_read_palette(avctx, (uint32_t*)s->frame.data[1])) < 0)
return res;
} else if (avctx->pix_fmt == PIX_FMT_RGB32 && avctx->bits_per_coded_sample <= 8) {
if ((res = ff_cmap_read_palette(avctx, s->mask_palbuf)) < 0)
return res;
}
s->init = 1;

@@ -552,6 +592,16 @@ static int decode_frame_byterun1(AVCodecContext *avctx,
decodeplane8(row, s->planebuf, s->planesize, plane);
}
}
} else if (avctx->bits_per_coded_sample <= 8) { //8-bit (+ mask) to PIX_FMT_BGR32
for (y = 0; y < avctx->height ; y++ ) {
uint8_t *row = &s->frame.data[0][y*s->frame.linesize[0]];
memset(s->mask_buf, 0, avctx->width * sizeof(uint32_t));
for (plane = 0; plane < s->bpp; plane++) {
buf += decode_byterun(s->planebuf, s->planesize, buf, buf_end);
decodeplane32(s->mask_buf, s->planebuf, s->planesize, plane);
}
lookup_pal_indicies((uint32_t *) row, s->mask_buf, s->mask_palbuf, avctx->width);
}
} else if (s->ham) { // HAM to PIX_FMT_BGR32
for (y = 0; y < avctx->height ; y++) {
uint8_t *row = &s->frame.data[0][y*s->frame.linesize[0]];


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