80 switch (bpp * 2 + be) {
83 return bytestream2_get_byte(gb);
85 return bytestream2_get_le16(gb);
87 return bytestream2_get_be16(gb);
89 return bytestream2_get_le32(gb);
91 return bytestream2_get_be32(gb);
101 uint16_t *dst16 = (uint16_t *)c->
curbits;
102 uint32_t *dst32 = (uint32_t *)c->
curbits;
104 for (j = 0; j < c->
cur_h; j++) {
105 for (i = 0; i < c->
cur_w; i++) {
118 for (j = 0; j < c->
cur_h; j++) {
119 for (i = 0; i < c->
cur_w; i++) {
152 if ((w < 1) || (h < 1))
158 for (j = 0; j <
h; j++) {
159 for (i = 0; i <
w; i++)
160 dst[i] = (dst[i] & cd[i]) ^ msk[
i];
165 }
else if (c->
bpp2 == 2) {
166 uint16_t *cd = (uint16_t*)c->
curbits, *msk = (uint16_t*)c->
curmask;
168 for (j = 0; j <
h; j++) {
169 dst2 = (uint16_t*)dst;
170 for (i = 0; i <
w; i++)
171 dst2[i] = (dst2[i] & cd[i]) ^ msk[
i];
176 }
else if (c->
bpp2 == 4) {
177 uint32_t *cd = (uint32_t*)c->
curbits, *msk = (uint32_t*)c->
curmask;
179 for (j = 0; j <
h; j++) {
180 dst2 = (uint32_t*)dst;
181 for (i = 0; i <
w; i++)
182 dst2[i] = (dst2[i] & cd[i]) ^ msk[
i];
196 dst += dx * bpp + dy *
stride;
198 for (j = 0; j <
h; j++) {
199 memset(dst, color, w);
202 }
else if (bpp == 2) {
204 for (j = 0; j <
h; j++) {
205 dst2 = (uint16_t*)dst;
206 for (i = 0; i <
w; i++)
210 }
else if (bpp == 4) {
212 for (j = 0; j <
h; j++) {
213 dst2 = (uint32_t*)dst;
214 for (i = 0; i <
w; i++)
226 for (j = 0; j <
h; j++) {
227 for (i = 0; i <
w; i++) {
234 ((uint16_t*)dst)[
i] = p;
237 ((uint32_t*)dst)[
i] = p;
249 int bg = 0, fg = 0, rects,
color,
flags, xy, wh;
252 int bw = 16, bh = 16;
254 for (j = 0; j <
h; j += 16) {
259 for (i = 0; i <
w; i += 16, dst2 += 16 *
bpp) {
266 flags = bytestream2_get_byte(gb);
280 rects = bytestream2_get_byte(gb);
281 color = !!(flags &
HT_CLR);
283 paint_rect(dst2, 0, 0, bw, bh, bg, bpp, stride);
289 for (k = 0; k < rects; k++) {
290 int rect_x, rect_y, rect_w, rect_h;
293 xy = bytestream2_get_byte(gb);
294 wh = bytestream2_get_byte(gb);
298 rect_w = (wh >> 4) + 1;
299 rect_h = (wh & 0xF) + 1;
301 if (rect_x + rect_w > w - i || rect_y + rect_h > h - j) {
307 rect_w, rect_h, fg, bpp, stride);
330 int buf_size = avpkt->
size;
334 int dx, dy,
w,
h, depth, enc, chunks, res, size_left,
ret;
338 chunks = bytestream2_get_be16(gb);
367 if ((w > 0) && (h > 0)) {
369 for (i = 0; i <
h; i++) {
382 dx = bytestream2_get_be16(gb);
383 dy = bytestream2_get_be16(gb);
384 w = bytestream2_get_be16(gb);
385 h = bytestream2_get_be16(gb);
386 enc = bytestream2_get_be32(gb);
389 "Incorrect frame size: %ix%i+%ix%i of %ix%i\n",
397 if (w*(int64_t)h*c->
bpp2 > INT_MAX/2 - 2) {
401 if (size_left < 2 + w * h * c->
bpp2 * 2) {
403 "Premature end of data! (need %i got %i)\n",
404 2 + w * h * c->
bpp2 * 2, size_left);
414 "Cursor hot spot is not in image: " 415 "%ix%i of %ix%i cursor size\n",
449 depth = bytestream2_get_byte(gb);
450 if (depth != c->
bpp) {
452 "Depth mismatch. Container %i bpp, " 453 "Frame data: %i bpp\n",
460 "Invalid header: bigendian flag = %i\n", c->
bigendian);
470 if (size_left < w * h * c->bpp2) {
472 "Premature end of data! (need %i got %i)\n",
473 w * h * c->
bpp2, size_left);
508 if ((w > 0) && (h > 0)) {
510 for (i = 0; i <
h; i++) {
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
This structure describes decoded (raw) audio or video data.
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
ptrdiff_t const GLvoid * data
static av_cold int init(AVCodecContext *avctx)
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 put_cursor(uint8_t *dst, int stride, VmncContext *c, int dx, int dy)
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
8 bits with AV_PIX_FMT_RGB32 palette
static const uint32_t color[16+AV_CLASS_CATEGORY_NB]
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
int av_frame_ref(AVFrame *dst, const AVFrame *src)
Set up a new reference to the data described by the source frame.
static av_always_inline void paint_raw(uint8_t *dst, int w, int h, GetByteContext *gb, int bpp, int be, int stride)
static av_always_inline int vmnc_get_pixel(GetByteContext *gb, int bpp, int be)
int bits_per_coded_sample
bits per sample/pixel from the demuxer (needed for huffyuv).
static av_always_inline int bytestream2_get_bytes_left(GetByteContext *g)
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
static av_cold int decode_end(AVCodecContext *avctx)
static av_always_inline void bytestream2_skip(GetByteContext *g, unsigned int size)
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
int ff_reget_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Identical in function to ff_get_buffer(), except it reuses the existing buffer if available...
const char * name
Name of the codec implementation.
enum AVPictureType pict_type
Picture type of the frame.
static void load_cursor(VmncContext *c)
int width
picture width / height.
static void reset_buffers(VmncContext *c)
static int decode_hextile(VmncContext *c, uint8_t *dst, GetByteContext *gb, int w, int h, int stride)
#define AV_LOG_INFO
Standard information.
int av_reallocp(void *ptr, size_t size)
Allocate, reallocate, or free a block of memory through a pointer to a pointer.
Libavcodec external API header.
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
main external API structure.
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it be(in the first position) for now.Options-------Then comes the options array.This is what will define the user accessible options.For example
static av_always_inline void paint_rect(uint8_t *dst, int dx, int dy, int w, int h, int color, int bpp, int stride)
#define flags(name, subs,...)
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
static av_cold int decode_init(AVCodecContext *avctx)
GLint GLenum GLboolean GLsizei stride
common internal api header.
common internal and external API header
#define AV_PIX_FMT_RGB555
int key_frame
1 -> keyframe, 0-> not
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.Frame references ownership and permissions
This structure stores compressed data.
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
#define AV_PIX_FMT_0RGB32