38 #define ZMBV_KEYFRAME 1 39 #define ZMBV_DELTAPAL 2 86 uint8_t *src2,
int stride2,
int bw,
int bh,
91 uint16_t histogram[256] = {0};
92 int bw_bytes = bw * c->
bypp;
95 for(j = 0; j < bh; j++){
96 for(i = 0; i < bw_bytes; i++){
97 int t = src[
i] ^ src2[
i];
105 *xored = (histogram[0] < bw_bytes * bh);
108 if (!*xored)
return 0;
111 for(i = 0; i < 256; i++)
121 int pstride,
int x,
int y,
int *mx,
int *my,
int *xored)
123 int dx, dy, txored, tv,
bv, bw, bh;
132 bv =
block_cmp(c, src, sstride, prev, pstride, bw, bh, xored);
138 tv =
block_cmp(c, src, sstride, prev + mx0 * c->
bypp + my0 * pstride, pstride, bw, bh, &txored);
151 if(!dx && !dy)
continue;
152 if(dx == mx0 && dy == my0)
continue;
153 tv =
block_cmp(c, src, sstride, prev + dx * c->
bypp + dy * pstride, pstride, bw, bh, &txored);
167 const AVFrame *pict,
int *got_packet)
170 const AVFrame *
const p = pict;
175 int work_size = 0, pkt_size;
183 #if FF_API_CODED_FRAME 191 chpal = !keyframe && palptr && memcmp(palptr, c->
pal2, 1024);
197 for(i = 0; i < 256; i++){
199 c->
work_buf[work_size++] = tpal[0] ^ c->
pal[i * 3 + 0];
200 c->
work_buf[work_size++] = tpal[1] ^ c->
pal[i * 3 + 1];
201 c->
work_buf[work_size++] = tpal[2] ^ c->
pal[i * 3 + 2];
202 c->
pal[i * 3 + 0] = tpal[0];
203 c->
pal[i * 3 + 1] = tpal[1];
204 c->
pal[i * 3 + 2] = tpal[2];
206 memcpy(c->
pal2, palptr, 1024);
210 for(i = 0; i < 256; i++){
214 memcpy(c->
pal2, palptr, 1024);
217 for(i = 0; i < avctx->
height; i++){
223 int x, y, bh2, bw2, xored;
231 memset(c->
work_buf + work_size, 0, (bw * bh * 2 + 3) & ~3);
232 work_size += (bw * bh * 2 + 3) & ~3;
239 tsrc = src + x * c->
bypp;
240 tprev = prev + x * c->
bypp;
243 mv[0] = (mx * 2) | !!xored;
247 for(j = 0; j < bh2; j++){
248 for(i = 0; i < bw2 * c->
bypp; i++)
249 c->
work_buf[work_size++] = tsrc[i] ^ tprev[i];
262 for(i = 0; i < avctx->
height; i++){
263 memcpy(prev, src, avctx->
width * c->
bypp);
272 c->
zstream.avail_in = work_size;
283 pkt_size = c->
zstream.total_out + 1 + 6*keyframe;
328 int prev_size, prev_offset;
343 #ifdef ZMBV_ENABLE_24BPP 348 #endif //ZMBV_ENABLE_24BPP 379 if(lvl < 0 || lvl > 9){
385 memset(&c->
zstream, 0,
sizeof(z_stream));
387 ((avctx->
width + ZMBV_BLOCK - 1) / ZMBV_BLOCK) * ((avctx->
height + ZMBV_BLOCK - 1) / ZMBV_BLOCK) * 2 + 4;
422 zret = deflateInit(&c->
zstream, lvl);
443 #ifdef ZMBV_ENABLE_24BPP 445 #endif //ZMBV_ENABLE_24BPP
This structure describes decoded (raw) audio or video data.
static av_cold int init(AVCodecContext *avctx)
packed RGB 5:5:5, 16bpp, (msb)1X 5R 5G 5B(lsb), little-endian, X=unused/undefined ...
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
static av_cold int encode_end(AVCodecContext *avctx)
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
packed RGB 5:6:5, 16bpp, (msb) 5R 6G 5B(lsb), little-endian
int ff_alloc_packet2(AVCodecContext *avctx, AVPacket *avpkt, int64_t size, int64_t min_size)
Check AVPacket size and/or allocate data.
8 bits with AV_PIX_FMT_RGB32 palette
int me_range
maximum motion estimation search range in subpel units If 0 then no limit.
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
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
static av_cold int encode_init(AVCodecContext *avctx)
Init zmbv encoder.
#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 flags
A combination of AV_PKT_FLAG values.
enum AVPictureType pict_type
Picture type of the frame.
int width
picture width / height.
packed RGB 8:8:8, 24bpp, BGRBGR...
static const int8_t mv[256][2]
#define AV_LOG_INFO
Standard information.
Libavcodec external API header.
int score_tab[ZMBV_BLOCK *ZMBV_BLOCK *4+1]
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
static int zmbv_me(ZmbvEncContext *c, uint8_t *src, int sstride, uint8_t *prev, int pstride, int x, int y, int *mx, int *my, int *xored)
Motion estimation function TODO make better ME decisions.
main external API structure.
packed BGR 8:8:8, 32bpp, BGRXBGRX... X=unused/undefined
static int encode_frame(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *pict, int *got_packet)
static enum AVPixelFormat pix_fmts[]
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
GLint GLenum GLboolean GLsizei stride
#define FF_DISABLE_DEPRECATION_WARNINGS
common internal api header.
common internal and external API header
attribute_deprecated AVFrame * coded_frame
the picture in the bitstream
static void deflate(uint8_t *dst, const uint8_t *p1, int width, int threshold, const uint8_t *coordinates[], int coord, int maxc)
#define FF_ENABLE_DEPRECATION_WARNINGS
int key_frame
1 -> keyframe, 0-> not
static int block_cmp(ZmbvEncContext *c, uint8_t *src, int stride, uint8_t *src2, int stride2, int bw, int bh, int *xored)
Block comparing function XXX should be optimized and moved to DSPContext.
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
AVPixelFormat
Pixel format.
This structure stores compressed data.
int keyint_min
minimum GOP size