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FFmpeg/libavcodec/iff.c
Michael Niedermayer d5ec8ba7f2 Do not leave positive values undefined when negative are defined as error 
Define positive return values as non errors and leave further meaning undefined
This allows future extensions to use these values

Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2013-10-19 16:42:57 +02:00

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/*
* IFF ACBM/DEEP/ILBM/PBM 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.
*
* FFmpeg 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,
* 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
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* 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 {
MASK_NONE,
MASK_HAS_MASK,
MASK_HAS_TRANSPARENT_COLOR,
MASK_LASSO
} mask_type;
typedef struct {
AVFrame *frame;
int planesize;
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)
unsigned flags; ///< 1 for EHB, 0 is no extra half darkening
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) \
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
*/
static int cmap_read_palette(AVCodecContext *avctx, uint32_t *pal)
{
IffContext *s = avctx->priv_data;
int count, i;
const uint8_t *const palette = avctx->extradata + AV_RB16(avctx->extradata);
int palette_size = avctx->extradata_size - AV_RB16(avctx->extradata);
if (avctx->bits_per_coded_sample > 8) {
av_log(avctx, AV_LOG_ERROR, "bits_per_coded_sample > 8 not supported\n");
return AVERROR_INVALIDDATA;
}
count = 1 << avctx->bits_per_coded_sample;
// If extradata is smaller than actually needed, fill the remaining with black.
count = FFMIN(palette_size / 3, count);
if (count) {
for (i = 0; i < count; i++)
pal[i] = 0xFF000000 | AV_RB24(palette + i*3);
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;
for (i = 0; i < count; i++)
pal[i] = 0xFF000000 | gray2rgb((i * 255) >> avctx->bits_per_coded_sample);
}
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;
}
/**
* Extracts the IFF extra context and updates internal
* decoder structures.
*
* @param avctx the AVCodecContext where to extract extra context to
* @param avpkt the AVPacket to extract extra context from or NULL to use avctx
* @return >= 0 in case of success, a negative error code otherwise
*/
static int extract_header(AVCodecContext *const avctx,
const AVPacket *const avpkt) {
const uint8_t *buf;
unsigned buf_size;
IffContext *s = avctx->priv_data;
int i, palette_size;
if (avctx->extradata_size < 2) {
av_log(avctx, AV_LOG_ERROR, "not enough extradata\n");
return AVERROR_INVALIDDATA;
}
palette_size = avctx->extradata_size - AV_RB16(avctx->extradata);
if (avpkt) {
int image_size;
if (avpkt->size < 2)
return AVERROR_INVALIDDATA;
image_size = avpkt->size - AV_RB16(avpkt->data);
buf = avpkt->data;
buf_size = bytestream_get_be16(&buf);
if (buf_size <= 1 || image_size <= 1) {
av_log(avctx, AV_LOG_ERROR,
"Invalid image size received: %u -> image data offset: %d\n",
buf_size, image_size);
return AVERROR_INVALIDDATA;
}
} else {
buf = avctx->extradata;
buf_size = bytestream_get_be16(&buf);
if (buf_size <= 1 || palette_size < 0) {
av_log(avctx, AV_LOG_ERROR,
"Invalid palette size received: %u -> palette data offset: %d\n",
buf_size, palette_size);
return AVERROR_INVALIDDATA;
}
}
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;
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);
if (s->bpp > 16) {
av_log(avctx, AV_LOG_ERROR, "bpp %d too large for palette\n", s->bpp);
av_freep(&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;
}
if (!s->bpp || s->bpp > 32) {
av_log(avctx, AV_LOG_ERROR, "Invalid number of bitplanes: %u\n", s->bpp);
return AVERROR_INVALIDDATA;
} else if (s->ham >= 8) {
av_log(avctx, AV_LOG_ERROR, "Invalid number of hold bits for HAM: %u\n", s->ham);
return AVERROR_INVALIDDATA;
}
av_freep(&s->ham_buf);
av_freep(&s->ham_palbuf);
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);
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);
}
if (count) { // HAM with color palette attached
// prefill with black and palette and set HAM take direct value mask to zero
memset(s->ham_palbuf, 0, (1 << s->ham) * 2 * sizeof (uint32_t));
for (i=0; i < count; i++) {
s->ham_palbuf[i*2+1] = 0xFF000000 | AV_RL24(palette + i*3);
}
count = 1 << s->ham;
} else { // HAM with grayscale color palette
count = 1 << s->ham;
for (i=0; i < count; i++) {
s->ham_palbuf[i*2] = 0xFF000000; // take direct color value from palette
s->ham_palbuf[i*2+1] = 0xFF000000 | av_le2ne32(gray2rgb((i * 255) >> s->ham));
}
}
for (i=0; i < count; i++) {
uint32_t tmp = i << (8 - s->ham);
tmp |= tmp >> s->ham;
s->ham_palbuf[(i+count)*2] = 0xFF00FFFF; // just modify blue color component
s->ham_palbuf[(i+count*2)*2] = 0xFFFFFF00; // just modify red color component
s->ham_palbuf[(i+count*3)*2] = 0xFFFF00FF; // just modify green color component
s->ham_palbuf[(i+count)*2+1] = 0xFF000000 | tmp << 16;
s->ham_palbuf[(i+count*2)*2+1] = 0xFF000000 | tmp;
s->ham_palbuf[(i+count*3)*2+1] = 0xFF000000 | 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;
}
}
}
return 0;
}
static av_cold int decode_init(AVCodecContext *avctx)
{
IffContext *s = avctx->priv_data;
int err;
if (avctx->bits_per_coded_sample <= 8) {
int palette_size;
if (avctx->extradata_size >= 2)
palette_size = avctx->extradata_size - AV_RB16(avctx->extradata);
else
palette_size = 0;
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('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_0BGR32;
} else if (avctx->bits_per_coded_sample == 32) {
avctx->pix_fmt = AV_PIX_FMT_BGR32;
} else {
avpriv_request_sample(avctx, "unknown bits_per_coded_sample");
return AVERROR_PATCHWELCOME;
}
}
} else {
return AVERROR_INVALIDDATA;
}
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->bpp = avctx->bits_per_coded_sample;
s->frame = av_frame_alloc();
if (!s->frame)
return AVERROR(ENOMEM);
if ((err = extract_header(avctx, NULL)) < 0)
return err;
return 0;
}
/**
* Decode interleaved plane buffer up to 8bpp
* @param dst Destination buffer
* @param buf Source buffer
* @param buf_size
* @param plane plane number to decode as
*/
static void decodeplane8(uint8_t *dst, const uint8_t *buf, int buf_size, int plane)
{
const uint64_t *lut = plane8_lut[plane];
if (plane >= 8) {
av_log(NULL, AV_LOG_WARNING, "Ignoring extra planes beyond 8\n");
return;
}
do {
uint64_t v = AV_RN64A(dst) | lut[*buf++];
AV_WN64A(dst, v);
dst += 8;
} while (--buf_size);
}
/**
* Decode interleaved plane buffer up to 24bpp
* @param dst Destination buffer
* @param buf Source buffer
* @param buf_size
* @param plane plane number to decode as
*/
static void decodeplane32(uint32_t *dst, const uint8_t *buf, int buf_size, int 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);
}
#define DECODE_HAM_PLANE32(x) \
first = buf[x] << 1; \
second = buf[(x)+1] << 1; \
delta &= pal[first++]; \
delta |= pal[first]; \
dst[x] = delta; \
delta &= pal[second++]; \
delta |= pal[second]; \
dst[(x)+1] = delta
/**
* Converts one line of HAM6/8-encoded chunky buffer to 24bpp.
*
* @param dst the destination 24bpp buffer
* @param buf the source 8bpp chunky buffer
* @param pal the HAM decode table
* @param buf_size the plane size in bytes
*/
static void decode_ham_plane32(uint32_t *dst, const uint8_t *buf,
const uint32_t *const pal, unsigned buf_size)
{
uint32_t delta = pal[1]; /* first palette entry */
do {
uint32_t first, second;
DECODE_HAM_PLANE32(0);
DECODE_HAM_PLANE32(2);
DECODE_HAM_PLANE32(4);
DECODE_HAM_PLANE32(6);
buf += 8;
dst += 8;
} 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.
*
* @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;
}
#define DECODE_RGBX_COMMON(type) \
if (!length) { \
length = bytestream2_get_byte(gb); \
if (!length) { \
length = bytestream2_get_be16(gb); \
if (!length) \
return; \
} \
} \
for (i = 0; i < length; i++) { \
*(type *)(dst + y*linesize + x * sizeof(type)) = 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(uint32_t)
}
}
/**
* 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(uint16_t)
}
}
/**
* Decode DEEP RLE 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)
*/
static void decode_deep_rle32(uint8_t *dst, const uint8_t *src, int src_size, int width, int height, int linesize)
{
const uint8_t *src_end = src + src_size;
int x = 0, y = 0, i;
while (src + 5 <= src_end) {
int opcode;
opcode = *(int8_t *)src++;
if (opcode >= 0) {
int size = opcode + 1;
for (i = 0; i < size; i++) {
int length = FFMIN(size - i, width);
memcpy(dst + y*linesize + x * 4, src, length * 4);
src += length * 4;
x += length;
i += length;
if (x >= width) {
x = 0;
y += 1;
if (y >= height)
return;
}
}
} else {
int size = -opcode + 1;
uint32_t pixel = AV_RN32(src);
for (i = 0; i < size; i++) {
*(uint32_t *)(dst + y*linesize + x * 4) = pixel;
x += 1;
if (x >= width) {
x = 0;
y += 1;
if (y >= height)
return;
}
}
src += 4;
}
}
}
/**
* 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;
avpriv_request_sample(avctx, "bitmap (compression %i, bpp %i, ham %i)", s->compression, s->bpp, s->ham);
return AVERROR_INVALIDDATA;
}
static int decode_frame(AVCodecContext *avctx,
void *data, int *got_frame,
AVPacket *avpkt)
{
IffContext *s = avctx->priv_data;
const uint8_t *buf = avpkt->size >= 2 ? avpkt->data + AV_RB16(avpkt->data) : NULL;
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;
if ((res = ff_reget_buffer(avctx, s->frame)) < 0)
return res;
if (!s->init && avctx->bits_per_coded_sample <= 8 &&
avctx->pix_fmt == AV_PIX_FMT_PAL8) {
if ((res = cmap_read_palette(avctx, (uint32_t *)s->frame->data[1])) < 0)
return res;
} else if (!s->init && avctx->bits_per_coded_sample <= 8 &&
avctx->pix_fmt == AV_PIX_FMT_RGB32) {
if ((res = cmap_read_palette(avctx, s->mask_palbuf)) < 0)
return res;
}
s->init = 1;
switch (s->compression) {
case 0:
if (avctx->codec_tag == MKTAG('A', 'C', 'B', 'M')) {
if (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_PIX_FMT_GRAY8) {
memset(s->frame->data[0], 0, avctx->height * s->frame->linesize[0]);
for (plane = 0; plane < s->bpp; plane++) {
for (y = 0; y < avctx->height && buf < buf_end; y++) {
uint8_t *row = &s->frame->data[0][y * s->frame->linesize[0]];
decodeplane8(row, buf, FFMIN(s->planesize, buf_end - buf), plane);
buf += s->planesize;
}
}
} else if (s->ham) { // HAM to AV_PIX_FMT_BGR32
memset(s->frame->data[0], 0, avctx->height * s->frame->linesize[0]);
for (y = 0; y < avctx->height; y++) {
uint8_t *row = &s->frame->data[0][y * s->frame->linesize[0]];
memset(s->ham_buf, 0, s->planesize * 8);
for (plane = 0; plane < s->bpp; plane++) {
const uint8_t * start = buf + (plane * avctx->height + y) * s->planesize;
if (start >= buf_end)
break;
decodeplane8(s->ham_buf, start, FFMIN(s->planesize, buf_end - start), plane);
}
decode_ham_plane32((uint32_t *)row, s->ham_buf, s->ham_palbuf, s->planesize);
}
} else
return unsupported(avctx);
} else if (avctx->codec_tag == MKTAG('D', 'E', 'E', 'P')) {
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
int raw_width = avctx->width * (av_get_bits_per_pixel(desc) >> 3);
int x;
for (y = 0; y < avctx->height && buf < buf_end; y++) {
uint8_t *row = &s->frame->data[0][y * s->frame->linesize[0]];
memcpy(row, buf, FFMIN(raw_width, buf_end - buf));
buf += raw_width;
if (avctx->pix_fmt == AV_PIX_FMT_BGR32) {
for (x = 0; x < avctx->width; x++)
row[4 * x + 3] = row[4 * x + 3] & 0xF0 | (row[4 * x + 3] >> 4);
}
}
} else if (avctx->codec_tag == MKTAG('I', 'L', 'B', 'M')) { // interleaved
if (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_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 < s->bpp && buf < buf_end; plane++) {
decodeplane8(row, buf, FFMIN(s->planesize, buf_end - buf), plane);
buf += s->planesize;
}
}
} else if (s->ham) { // HAM to AV_PIX_FMT_BGR32
for (y = 0; y < avctx->height; y++) {
uint8_t *row = &s->frame->data[0][y * s->frame->linesize[0]];
memset(s->ham_buf, 0, s->planesize * 8);
for (plane = 0; plane < s->bpp && buf < buf_end; plane++) {
decodeplane8(s->ham_buf, buf, FFMIN(s->planesize, buf_end - buf), plane);
buf += s->planesize;
}
decode_ham_plane32((uint32_t *)row, s->ham_buf, s->ham_palbuf, s->planesize);
}
} else { // AV_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 < s->bpp && buf < buf_end; plane++) {
decodeplane32((uint32_t *)row, buf,
FFMIN(s->planesize, buf_end - buf), plane);
buf += s->planesize;
}
}
}
} else if (avctx->codec_tag == MKTAG('P', 'B', 'M', ' ')) { // IFF-PBM
if (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_PIX_FMT_GRAY8) {
for (y = 0; y < avctx->height && buf_end > buf; 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
}
} else if (s->ham) { // IFF-PBM: HAM to AV_PIX_FMT_BGR32
for (y = 0; y < avctx->height && buf_end > buf; y++) {
uint8_t *row = &s->frame->data[0][y * s->frame->linesize[0]];
memcpy(s->ham_buf, buf, FFMIN(avctx->width, buf_end - buf));
buf += avctx->width + (avctx->width & 1); // padding if odd
decode_ham_plane32((uint32_t *)row, s->ham_buf, s->ham_palbuf, s->planesize);
}
} else
return unsupported(avctx);
}
break;
case 1:
if (avctx->codec_tag == MKTAG('I', 'L', 'B', 'M')) { // interleaved
if (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_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 < s->bpp; plane++) {
buf += decode_byterun(s->planebuf, s->planesize, buf, buf_end);
decodeplane8(row, s->planebuf, s->planesize, plane);
}
}
} else if (avctx->bits_per_coded_sample <= 8) { //8-bit (+ mask) to AV_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 AV_PIX_FMT_BGR32
for (y = 0; y < avctx->height; y++) {
uint8_t *row = &s->frame->data[0][y * s->frame->linesize[0]];
memset(s->ham_buf, 0, s->planesize * 8);
for (plane = 0; plane < s->bpp; plane++) {
buf += decode_byterun(s->planebuf, s->planesize, buf, buf_end);
decodeplane8(s->ham_buf, s->planebuf, s->planesize, plane);
}
decode_ham_plane32((uint32_t *)row, s->ham_buf, s->ham_palbuf, s->planesize);
}
} else { // AV_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 < s->bpp; plane++) {
buf += decode_byterun(s->planebuf, s->planesize, buf, buf_end);
decodeplane32((uint32_t *)row, s->planebuf, s->planesize, plane);
}
}
}
} else if (avctx->codec_tag == MKTAG('P', 'B', 'M', ' ')) { // IFF-PBM
if (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_PIX_FMT_GRAY8) {
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);
}
} else if (s->ham) { // IFF-PBM: HAM to AV_PIX_FMT_BGR32
for (y = 0; y < avctx->height; y++) {
uint8_t *row = &s->frame->data[0][y * s->frame->linesize[0]];
buf += decode_byterun(s->ham_buf, avctx->width, buf, buf_end);
decode_ham_plane32((uint32_t *)row, s->ham_buf, s->ham_palbuf, s->planesize);
}
} else
return unsupported(avctx);
} else if (avctx->codec_tag == MKTAG('D', 'E', 'E', 'P')) { // IFF-DEEP
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
if (av_get_bits_per_pixel(desc) == 32)
decode_deep_rle32(s->frame->data[0], buf, buf_size, avctx->width, avctx->height, s->frame->linesize[0]);
else
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);
}
if ((res = av_frame_ref(data, s->frame)) < 0)
return res;
*got_frame = 1;
return buf_size;
}
static av_cold int decode_end(AVCodecContext *avctx)
{
IffContext *s = avctx->priv_data;
av_frame_free(&s->frame);
av_freep(&s->planebuf);
av_freep(&s->ham_buf);
av_freep(&s->ham_palbuf);
return 0;
}
#if CONFIG_IFF_ILBM_DECODER
AVCodec ff_iff_ilbm_decoder = {
.name = "iff",
.long_name = NULL_IF_CONFIG_SMALL("IFF"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_IFF_ILBM,
.priv_data_size = sizeof(IffContext),
.init = decode_init,
.close = decode_end,
.decode = decode_frame,
.capabilities = CODEC_CAP_DR1,
};
#endif
#if CONFIG_IFF_BYTERUN1_DECODER
AVCodec ff_iff_byterun1_decoder = {
.name = "iff",
.long_name = NULL_IF_CONFIG_SMALL("IFF"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_IFF_BYTERUN1,
.priv_data_size = sizeof(IffContext),
.init = decode_init,
.close = decode_end,
.decode = decode_frame,
.capabilities = CODEC_CAP_DR1,
};
#endif
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