44 if (*x + run >= s->
width) {
45 int n = s->
width - *x;
46 memset(d + *x, value, n);
53 memset(d + *x, value, run);
61 int *x,
int *y,
int *plane,
int bits_per_plane)
64 int shift = *plane * bits_per_plane;
65 unsigned mask = ((1
U << bits_per_plane) - 1) <<
shift;
69 int pixels_per_value = 8/bits_per_plane;
75 for (j = 8-bits_per_plane; j >= 0; j -= bits_per_plane) {
76 d[xl] |= (value >> j) & mask;
78 while (xl == s->
width) {
86 value <<= bits_per_plane;
87 mask <<= bits_per_plane;
91 run*pixels_per_value >= s->
width &&
92 pixels_per_value < s->
width &&
93 s->
width % pixels_per_value == 0
95 for (; xl < pixels_per_value; xl ++) {
96 j = (j < bits_per_plane ? 8 : j) - bits_per_plane;
97 d[xl] |= (value >> j) & mask;
100 run -= s->
width / pixels_per_value;
114 [0] = { 0, 3, 5, 7 },
115 [1] = { 0, 2, 4, 6 },
116 [2] = { 0, 3, 4, 7 },
117 [3] = { 0, 11, 13, 15 },
118 [4] = { 0, 10, 12, 14 },
119 [5] = { 0, 11, 12, 15 },
123 void *
data,
int *got_frame,
129 int bits_per_plane, bpp, etype, esize, npal, pos_after_pal;
130 int i, x, y, plane,
tmp, ret,
val;
137 if (bytestream2_get_le16u(&s->
g) != 0x1234)
140 s->
width = bytestream2_get_le16u(&s->
g);
141 s->
height = bytestream2_get_le16u(&s->
g);
143 tmp = bytestream2_get_byteu(&s->
g);
144 bits_per_plane = tmp & 0xF;
147 if (bits_per_plane > 8 || bpp < 1 || bpp > 32) {
152 if (bytestream2_peek_byte(&s->
g) == 0xFF || bpp == 1 || bpp == 4 || bpp == 8) {
154 etype = bytestream2_get_le16(&s->
g);
155 esize = bytestream2_get_le16(&s->
g);
180 palette = (uint32_t*)frame->
data[1];
181 if (etype == 1 && esize > 1 && bytestream2_peek_byte(&s->
g) < 6) {
182 int idx = bytestream2_get_byte(&s->
g);
184 for (i = 0; i < npal; i++)
186 }
else if (etype == 2) {
187 npal =
FFMIN(esize, 16);
188 for (i = 0; i < npal; i++) {
189 int pal_idx = bytestream2_get_byte(&s->
g);
192 }
else if (etype == 3) {
193 npal =
FFMIN(esize, 16);
194 for (i = 0; i < npal; i++) {
195 int pal_idx = bytestream2_get_byte(&s->
g);
198 }
else if (etype == 4 || etype == 5) {
199 npal =
FFMIN(esize / 3, 256);
200 for (i = 0; i < npal; i++) {
201 palette[
i] = bytestream2_get_be24(&s->
g) << 2;
202 palette[
i] |= 0xFFU << 24 | palette[i] >> 6 & 0x30303;
207 palette[0] = 0xFF000000;
208 palette[1] = 0xFFFFFFFF;
209 }
else if (bpp == 2) {
211 for (i = 0; i < npal; i++)
225 if (bytestream2_get_le16(&s->
g)) {
229 int stop_size, marker,
t1,
t2;
232 t2 = bytestream2_get_le16(&s->
g);
233 stop_size = t1 -
FFMIN(t1, t2);
236 marker = bytestream2_get_byte(&s->
g);
241 val = bytestream2_get_byte(&s->
g);
243 run = bytestream2_get_byte(&s->
g);
245 run = bytestream2_get_le16(&s->
g);
246 val = bytestream2_get_byte(&s->
g);
249 if (bits_per_plane == 8) {
254 picmemset(s, frame, val, run, &x, &y, &plane, bits_per_plane);
263 int run = (y + 1) * avctx->
width - x;
264 if (bits_per_plane == 8)
267 picmemset(s, frame, val, run / (8 / bits_per_plane), &x, &y, &plane, bits_per_plane);
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
static int shift(int a, int b)
This structure describes decoded (raw) audio or video data.
static void picmemset_8bpp(PicContext *s, AVFrame *frame, int value, int run, int *x, int *y)
int ff_set_dimensions(AVCodecContext *s, int width, int height)
Check that the provided frame dimensions are valid and set them on the codec context.
#define avpriv_request_sample(...)
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
static const uint8_t cga_mode45_index[6][4]
8 bits with AV_PIX_FMT_RGB32 palette
static av_cold int end(AVCodecContext *avctx)
void av_memcpy_backptr(uint8_t *dst, int back, int cnt)
Overlapping memcpy() implementation.
static av_always_inline int bytestream2_get_bytes_left(GetByteContext *g)
#define i(width, name, range_min, range_max)
static const uint16_t mask[17]
static av_always_inline void bytestream2_skip(GetByteContext *g, unsigned int size)
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
const char * name
Name of the codec implementation.
int av_image_check_size(unsigned int w, unsigned int h, int log_offset, void *log_ctx)
Check if the given dimension of an image is valid, meaning that all bytes of the image can be address...
enum AVPictureType pict_type
Picture type of the frame.
int width
picture width / height.
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
static av_always_inline int bytestream2_tell(GetByteContext *g)
Libavcodec external API header.
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
main external API structure.
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
AVCodec ff_pictor_decoder
int palette_has_changed
Tell user application that palette has changed from previous frame.
const uint32_t ff_cga_palette[16]
const uint32_t ff_ega_palette[64]
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
common internal api header.
static av_always_inline int bytestream2_seek(GetByteContext *g, int offset, int whence)
static double val(void *priv, double ch)
This structure stores compressed data.
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
static void picmemset(PicContext *s, AVFrame *frame, unsigned value, int run, int *x, int *y, int *plane, int bits_per_plane)