45 #define DECOMP_BUF_PADDING 16 50 static const int shift1[6] = { 0, 8, 8, 8, 4, 4 };
51 static const int shift2[6] = { 0, 0, 8, 4, 0, 4 };
57 uint8_t *src_end = src + srcsize;
59 int type, x, y, d, d2;
66 data = code + ((avctx->
width * avctx->
height) >> 4);
70 for(j = 0; j < avctx->
height; j += 4){
71 for(i = 0; i < avctx->
width; i += 4){
72 if (data > src_end || mv > src_end || msk > src_end)
79 x = (*mv) >> 4;
if(x & 8) x = 8 - x;
80 y = (*mv++) & 0xF;
if(y & 8) y = 8 - y;
81 if (i < -x || avctx->
width - i - 4 < x ||
82 j < -y || avctx->
height - j - 4 < y) {
89 for(y = 0; y < 4; y++){
107 mask = ((msk[0] & 0xF0) <<
shift1[type]) | ((msk[0] & 0xF) <<
shift2[type]);
110 for(y = 0; y < 4; y++){
111 for(x = 0; x < 4; x++){
112 tmp[x] = (mask & 0x8000) ? *data++ : tmp2[x];
120 for(y = 0; y < 4; y++){
121 memset(tmp, data[0], 4);
127 for(y = 0; y < 4; y++){
128 memcpy(tmp, data, 4);
135 for(k = 0; k < 4; k++){
136 d = ((k & 1) << 1) + ((k & 2) * stride);
137 d2 = ((k & 1) << 1) + ((k & 2) * stride);
141 x = (*mv) >> 4;
if(x & 8) x = 8 - x;
142 y = (*mv++) & 0xF;
if(y & 8) y = 8 - y;
143 if (i + 2*(k & 1) < -x || avctx->
width - i - 2*(k & 1) - 2 < x ||
144 j + (k & 2) < -y || avctx->
height - j - (k & 2) - 2 < y) {
150 tmp[d + 0 ] = tmp2[0];
151 tmp[d + 1 ] = tmp2[1];
156 tmp[d + 0 ] = data[0];
157 tmp[d + 1 ] = data[0];
158 tmp[d + 0 +
stride] = data[0];
159 tmp[d + 1 +
stride] = data[0];
163 tmp[d + 0 ] = *data++;
164 tmp[d + 1 ] = *data++;
165 tmp[d + 0 +
stride] = *data++;
166 tmp[d + 1 +
stride] = *data++;
175 for(y = 0; y < 4; y++){
176 for(x = 0; x < 4; x++){
177 tmp[x] = data[mask & 1];
189 for(y = 0; y < 4; y++){
190 for(x = 0; x < 4; x++){
191 tmp[x] = data[mask & 3];
214 uint8_t *outptr, *srcptr, *tmpptr;
216 int i, j, compr,
ret;
224 if (bytestream2_peek_le32(&gb) ==
MKTAG(
'C',
'M',
'A',
'P')) {
226 for(i = 0; i < 256; i++){
227 c->
pal[
i] = 0xFF
U << 24 | bytestream2_get_be24(&gb);
237 outptr = frame->
data[0];
242 if (bytestream2_get_le32(&gb) ==
MKTAG(
'N',
'U',
'L',
'L'))
245 compr = bytestream2_get_byte(&gb);
248 if (compr != 4 && compr != -1) {
277 for (j = 0; j < avctx->
height; j++) {
278 memcpy(outptr, srcptr, avctx->
width);
280 srcptr += avctx->
width;
292 for (j = 0; j < avctx->
height; j++) {
294 for(i = 0; i < avctx->
width; i++)
295 outptr[i] = srcptr[i] ^ tmpptr[i];
298 memcpy(outptr, srcptr, avctx->
width);
300 srcptr += avctx->
width;
#define FF_CODEC_CAP_INIT_CLEANUP
The codec allows calling the close function for deallocation even if the init function returned a fai...
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
This structure describes decoded (raw) audio or video data.
ptrdiff_t const GLvoid * data
static av_cold int init(AVCodecContext *avctx)
#define avpriv_request_sample(...)
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
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)
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_WB32 unsigned int_TMPL AV_WB24 unsigned int_TMPL AV_RB16
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
static av_cold int decode_end(AVCodecContext *avctx)
static int decode_13(AVCodecContext *avctx, DxaDecContext *c, uint8_t *dst, int stride, uint8_t *src, int srcsize, uint8_t *ref)
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
8 bits with AV_PIX_FMT_RGB32 palette
#define FF_DEBUG_PICT_INFO
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.
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_RB32
static av_always_inline int bytestream2_get_bytes_left(GetByteContext *g)
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
static const int shift1[6]
static const uint16_t mask[17]
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. ...
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
const char * name
Name of the codec implementation.
enum AVPictureType pict_type
Picture type of the frame.
int width
picture width / height.
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
#define DECOMP_BUF_PADDING
static const int8_t mv[256][2]
static av_always_inline int bytestream2_tell(GetByteContext *g)
Libavcodec external API header.
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.
int palette_has_changed
Tell user application that palette has changed from previous frame.
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
and forward the test the status of outputs and forward it to the corresponding return FFERROR_NOT_READY If the filters stores internally one or a few frame for some it can consider them to be part of the FIFO and delay acknowledging a status change accordingly Example code
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
GLint GLenum GLboolean GLsizei stride
common internal api header.
common internal and external API header
static int ref[MAX_W *MAX_W]
static av_cold int decode_init(AVCodecContext *avctx)
static const int shift2[6]
#define AVERROR_UNKNOWN
Unknown error, typically from an external library.
int key_frame
1 -> keyframe, 0-> not
int flags2
AV_CODEC_FLAG2_*.
#define AV_CODEC_FLAG2_SHOW_ALL
Show all frames before the first keyframe.
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
#define MKTAG(a, b, c, d)
This structure stores compressed data.
#define AV_GET_BUFFER_FLAG_REF
The decoder will keep a reference to the frame and may reuse it later.
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.