46 #if FF_API_PRIVATE_OPT 56 return (aa->
len - bb->len)*256 + aa->
sym - bb->sym;
63 return aa->
sym - bb->sym;
72 for (i = 0; i < 4; i++)
81 int i, subsampled_height;
82 uint32_t original_format;
103 "4:2:0 video requires even width and height.\n");
114 if (avctx->
width & 1) {
116 "4:2:2 video requires even width.\n");
143 #if FF_API_PRIVATE_OPT 148 "Prediction method %d is not supported in Ut Video.\n",
155 "Plane prediction is not supported in Ut Video.\n");
176 "Slice count %d is not supported in Ut Video (theoretical range is 0-256).\n",
183 if (avctx->
slices > subsampled_height) {
185 "Slice count %d is larger than the subsampling-applied height %d.\n",
186 avctx->
slices, subsampled_height);
202 for (i = 0; i < c->
planes; i++) {
235 c->
slices = subsampled_height / 120;
269 int k = 2 * dst_stride;
276 for (j = 0; j <
height; j++) {
278 for (i = 0; i <
width; i++) {
282 dst[1][k] = sb[
i] -
g;
283 dst[2][k] = sr[
i] -
g;
287 for (i = 0; i <
width; i++) {
291 dst[1][k] = sb[
i] -
g;
292 dst[2][k] = sr[
i] -
g;
298 k += dst_stride -
width;
318 for (i = 0; i <
width; i++) {
319 *dst++ = src[
i] - prev;
335 for (j = 1; j <
height; j++) {
344 int height, uint64_t *counts)
348 for (j = 0; j <
height; j++) {
349 for (i = 0; i <
width; i++) {
365 while (he[last].
len == 255 && last)
369 for (i = last; i >= 0; i--) {
371 code += 0x80000000
u >> (he[
i].
len - 1);
388 for (j = 0; j <
height; j++) {
389 for (i = 0; i <
width; i++)
416 uint64_t counts[256] = { 0 };
420 uint32_t
offset = 0, slice_len = 0;
422 int i, sstart, send = 0;
429 for (i = 0; i < c->
slices; i++) {
431 send = height * (i + 1) / c->
slices & cmask;
433 src + sstart * stride, stride,
434 width, send - sstart);
438 for (i = 0; i < c->
slices; i++) {
440 send = height * (i + 1) / c->
slices & cmask;
445 for (i = 0; i < c->
slices; i++) {
447 send = height * (i + 1) / c->
slices & cmask;
449 stride, width, send - sstart);
462 for (symbol = 0; symbol < 256; symbol++) {
464 if (counts[symbol]) {
466 if (counts[symbol] == width * (int64_t)height) {
471 for (i = 0; i < 256; i++) {
473 bytestream2_put_byte(pb, 0);
475 bytestream2_put_byte(pb, 0xFF);
479 for (i = 0; i < c->
slices; i++)
480 bytestream2_put_le32(pb, 0);
498 for (i = 0; i < 256; i++) {
499 bytestream2_put_byte(pb, lengths[i]);
501 he[
i].
len = lengths[
i];
509 for (i = 0; i < c->
slices; i++) {
511 send = height * (i + 1) / c->
slices & cmask;
518 width * height + 4, width,
519 send - sstart, he) >> 3;
521 slice_len = offset - slice_len;
529 bytestream2_put_le32(pb, offset);
533 offset - slice_len, SEEK_CUR);
552 const AVFrame *pic,
int *got_packet)
591 for (i = 0; i < c->
planes; i++) {
603 for (i = 0; i < c->
planes; i++) {
605 pic->
linesize[i], i, width, height, &pb);
614 for (i = 0; i < c->
planes; i++) {
616 pic->
linesize[i], i, width >> !!i, height, &pb);
625 for (i = 0; i < c->
planes; i++) {
627 pic->
linesize[i], i, width >> !!i, height >> !!i,
648 bytestream2_put_le32(&pb, frame_info);
654 #if FF_API_CODED_FRAME 670 #define OFFSET(x) offsetof(UtvideoContext, x) 671 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM 695 .priv_class = &utvideo_class,
also ITU-R BT1361 / IEC 61966-2-4 xvYCC709 / SMPTE RP177 Annex B
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
static int ut_huff_cmp_len(const void *a, const void *b)
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
This structure describes decoded (raw) audio or video data.
static int encode_plane(AVCodecContext *avctx, uint8_t *src, uint8_t *dst, ptrdiff_t stride, int plane_no, int width, int height, PutByteContext *pb)
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
static void put_bits(Jpeg2000EncoderContext *s, int val, int n)
put n times val bit
#define AV_LOG_WARNING
Something somehow does not look correct.
#define LIBAVUTIL_VERSION_INT
static int huff_cmp_sym(const void *a, const void *b)
static av_cold int init(AVCodecContext *avctx)
static av_always_inline void bytestream2_init_writer(PutByteContext *p, uint8_t *buf, int buf_size)
const char * av_default_item_name(void *ptr)
Return the context name.
LLVidEncDSPContext llvidencdsp
The reader does not expect b to be semantically here and if the code is changed by maybe adding a a division or other the signedness will almost certainly be mistaken To avoid this confusion a new type was SUINT is the C unsigned type but it holds a signed int to use the same example SUINT a
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
static av_cold int utvideo_encode_init(AVCodecContext *avctx)
void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size)
Same behaviour av_fast_malloc but the buffer has additional AV_INPUT_BUFFER_PADDING_SIZE at the end w...
static void median_predict(UtvideoContext *c, uint8_t *src, uint8_t *dst, ptrdiff_t stride, int width, int height)
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
av_cold void ff_llvidencdsp_init(LLVidEncDSPContext *c)
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
int ff_alloc_packet2(AVCodecContext *avctx, AVPacket *avpkt, int64_t size, int64_t min_size)
Check AVPacket size and/or allocate data.
void(* bswap_buf)(uint32_t *dst, const uint32_t *src, int w)
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 vf offset
AVCodec ff_utvideo_encoder
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
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
#define u(width, name, range_min, range_max)
static int utvideo_encode_frame(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *pic, int *got_packet)
int bits_per_coded_sample
bits per sample/pixel from the demuxer (needed for huffyuv).
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
void(* sub_median_pred)(uint8_t *dst, const uint8_t *src1, const uint8_t *src2, intptr_t w, int *left, int *left_top)
Subtract HuffYUV's variant of median prediction.
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
#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.
static int write_huff_codes(uint8_t *src, uint8_t *dst, int dst_size, int width, int height, HuffEntry *he)
static av_always_inline int bytestream2_tell_p(PutByteContext *p)
#define AV_CODEC_CAP_FRAME_THREADS
Codec supports frame-level multithreading.
int flags
A combination of AV_PKT_FLAG values.
static int put_bits_count(PutBitContext *s)
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
static const struct @321 planes[]
static const AVOption options[]
enum AVPictureType pict_type
Picture type of the frame.
int width
picture width / height.
static const AVClass utvideo_class
static av_always_inline unsigned int bytestream2_put_buffer(PutByteContext *p, const uint8_t *src, unsigned int size)
static av_always_inline int bytestream2_seek_p(PutByteContext *p, int offset, int whence)
int ff_huff_gen_len_table(uint8_t *dst, const uint64_t *stats, int stats_size, int skip0)
Libavcodec external API header.
attribute_deprecated int prediction_method
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
main external API structure.
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
Describe the class of an AVClass context structure.
enum AVColorSpace colorspace
YUV colorspace type.
huffman tree builder and VLC generator
static enum AVPixelFormat pix_fmts[]
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
static void mangle_rgb_planes(uint8_t *dst[4], ptrdiff_t dst_stride, uint8_t *const src[4], int planes, const int stride[4], int width, int height)
static void calculate_codes(HuffEntry *he)
static void count_usage(uint8_t *src, int width, int height, uint64_t *counts)
GLint GLenum GLboolean GLsizei stride
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
#define FF_DISABLE_DEPRECATION_WARNINGS
common internal api header.
static void flush_put_bits(PutBitContext *s)
Pad the end of the output stream with zeros.
planar GBRA 4:4:4:4 32bpp
attribute_deprecated AVFrame * coded_frame
the picture in the bitstream
static void init_put_bits(PutBitContext *s, uint8_t *buffer, int buffer_size)
Initialize the PutBitContext s.
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
int slices
Number of slices.
av_cold void ff_bswapdsp_init(BswapDSPContext *c)
uint8_t * slice_buffer[4]
#define AVERROR_OPTION_NOT_FOUND
Option not found.
#define FF_ENABLE_DEPRECATION_WARNINGS
int key_frame
1 -> keyframe, 0-> not
void av_image_copy_plane(uint8_t *dst, int dst_linesize, const uint8_t *src, int src_linesize, int bytewidth, int height)
Copy image plane from src to dst.
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)
AVPixelFormat
Pixel format.
static av_cold int utvideo_encode_close(AVCodecContext *avctx)
This structure stores compressed data.
void(* sub_left_predict)(uint8_t *dst, uint8_t *src, ptrdiff_t stride, ptrdiff_t width, int height)
static const int ut_pred_order[5]