Go to the documentation of this file.
37 #define PIXLET_MAGIC 0xDEADBEEF
97 if (!
ctx->filter[0] || !
ctx->filter[1] || !
ctx->prediction)
100 for (plane = 0; plane < 3; plane++) {
101 unsigned shift = plane > 0;
110 unsigned scale =
ctx->levels - (
i / 3);
112 ctx->band[plane][
i + 1].width =
w >> scale;
113 ctx->band[plane][
i + 1].height =
h >> scale;
114 ctx->band[plane][
i + 1].size = (
w >> scale) * (
h >> scale);
116 ctx->band[plane][
i + 1].x = (
w >> scale) * (((
i + 1) % 3) != 2);
117 ctx->band[plane][
i + 1].y = (
h >> scale) * (((
i + 1) % 3) != 1);
129 unsigned cnt1, nbits, k, j = 0,
i = 0;
131 int rlen, escape,
flag = 0;
141 escape = ((1 << nbits) - 1) * cnt1;
144 escape =
value + ((1 << nbits) - 1) * cnt1 - 1;
151 dst[j++] =
value * ((escape +
flag + 1) >> 1);
164 escape = av_mod_uintp2(16383, nbits);
172 rlen =
value + escape * cnt1 - 1;
175 rlen = escape * cnt1;
183 for (k = 0; k < rlen; k++) {
192 flag = rlen < 0xFFFF ? 1 : 0;
200 int size,
int c,
int a,
int d,
205 unsigned cnt1, shbits, rlen, nbits, length,
i = 0, j = 0, k;
224 if (((
state >> 8) + 3) & 0xFFFFFFF)
230 if (cnt1 >= length) {
233 pfx = 14 + ((((uint64_t)(
value - 14)) >> 32) & (
value - 14));
234 if (pfx < 1 || pfx > 25)
236 cnt1 *= (1 << pfx) - 1;
249 if (
flag + cnt1 == 0) {
253 tmp = (int64_t)
c * ((yflag + 1) >> 1) + (
c >> 1);
263 state += (int64_t)d * (uint64_t)yflag - ((int64_t)(d * (uint64_t)
state) >> 8);
271 escape = av_mod_uintp2(16383, pfx);
274 if (pfx < 1 || pfx > 25)
280 rlen =
value + escape * cnt1 - 1;
283 rlen = escape * cnt1;
291 rlen =
value + 8 * escape;
294 if (rlen > 0xFFFF ||
i + rlen >
size)
298 for (k = 0; k < rlen; k++) {
307 flag = rlen < 0xFFFF ? 1 : 0;
321 for (
i = 0;
i <
ctx->levels * 3;
i++) {
326 int16_t *dest = (int16_t *)
frame->data[plane] +
327 ctx->band[plane][
i + 1].x +
329 unsigned size =
ctx->band[plane][
i + 1].size;
330 uint32_t magic = bytestream2_get_be32(&
ctx->gb);
334 "wrong magic number: 0x%08"PRIX32
" for plane %d, band %d\n",
347 "error in highpass coefficients for plane %d, band %d\n",
368 for (j = 1; j <
width; j++) {
379 int16_t *low, *high, *ll, *lh, *hl, *hh;
385 high = &low[hsize + 8];
387 memcpy(low, dest,
size);
388 memcpy(high, dest + hsize,
size);
394 for (
i = 4, j = 2;
i;
i--, j++, ll--, hh++, lh++, hl--) {
395 low[
i - 5] = low[j - 1];
397 high[
i - 5] = high[j - 2];
401 for (
i = 0;
i < hsize;
i++) {
402 value = (int64_t) low [
i + 1] * -INT64_C(325392907) +
403 (int64_t) low [
i + 0] * INT64_C(3687786320) +
404 (int64_t) low [
i - 1] * -INT64_C(325392907) +
405 (int64_t) high[
i + 0] * INT64_C(1518500249) +
406 (int64_t) high[
i - 1] * INT64_C(1518500249);
407 dest[
i * 2] = av_clip_int16(((
value >> 32) * scale) >> 32);
410 for (
i = 0;
i < hsize;
i++) {
411 value = (int64_t) low [
i + 2] * -INT64_C(65078576) +
412 (int64_t) low [
i + 1] * INT64_C(1583578880) +
413 (int64_t) low [
i + 0] * INT64_C(1583578880) +
414 (int64_t) low [
i - 1] * -INT64_C(65078576) +
415 (int64_t) high[
i + 1] * INT64_C(303700064) +
416 (int64_t) high[
i + 0] * -INT64_C(3644400640) +
417 (int64_t) high[
i - 1] * INT64_C(303700064);
418 dest[
i * 2 + 1] = av_clip_int16(((
value >> 32) * scale) >> 32);
424 int64_t *scaling_h, int64_t *scaling_v)
427 unsigned scaled_width, scaled_height;
436 int64_t scale_v = scaling_v[
i];
437 int64_t scale_h = scaling_h[
i];
442 for (j = 0; j < scaled_height; j++) {
443 filterfn(ptr,
ctx->filter[1], scaled_width, scale_v);
447 for (j = 0; j < scaled_width; j++) {
449 for (k = 0; k < scaled_height; k++) {
457 for (k = 0; k < scaled_height; k++) {
467 uint16_t *dsty = (uint16_t *)
frame->data[0];
468 int16_t *srcy = (int16_t *)
frame->data[0];
469 ptrdiff_t stridey =
frame->linesize[0] / 2;
472 for (j = 0; j <
h; j++) {
473 for (
i = 0;
i <
w;
i++) {
476 else if (srcy[
i] > ((1 << depth) - 1))
479 dsty[
i] = ((int64_t) srcy[
i] * srcy[
i] * 65535) /
480 ((1 << depth) - 1) / ((1 << depth) - 1);
489 uint16_t *dstu = (uint16_t *)
frame->data[1];
490 uint16_t *dstv = (uint16_t *)
frame->data[2];
491 int16_t *srcu = (int16_t *)
frame->data[1];
492 int16_t *srcv = (int16_t *)
frame->data[2];
493 ptrdiff_t strideu =
frame->linesize[1] / 2;
494 ptrdiff_t stridev =
frame->linesize[2] / 2;
495 const unsigned add = 1 << (depth - 1);
496 const unsigned shift = 16 - depth;
499 for (j = 0; j <
h; j++) {
500 for (
i = 0;
i <
w;
i++) {
516 unsigned shift = plane > 0;
520 for (
i =
ctx->levels - 1;
i >= 0;
i--) {
527 ctx->scaling[plane][
H][
i] = (1000000ULL << 32) /
h;
528 ctx->scaling[plane][
V][
i] = (1000000ULL << 32) / v;
533 dst = (int16_t *)
frame->data[plane];
542 ctx->band[plane][0].width - 1, 0);
545 "error in lowpass coefficients for plane %d, top row\n", plane);
550 ctx->band[plane][0].height - 1, 1,
stride);
553 "error in lowpass coefficients for plane %d, left column\n",
559 (
ctx->band[plane][0].width - 1) * (
ctx->band[plane][0].height - 1),
563 "error in lowpass coefficients for plane %d, rest\n", plane);
582 ctx->scaling[plane][
V]);
598 pktsize = bytestream2_get_be32(&
ctx->gb);
609 if (bytestream2_get_be32(&
ctx->gb) != 1)
613 width = bytestream2_get_be32(&
ctx->gb);
623 ctx->levels = bytestream2_get_be32(&
ctx->gb);
626 ctx->depth = bytestream2_get_be32(&
ctx->gb);
627 if (
ctx->depth < 8 ||
ctx->depth > 15) {
662 for (
i = 0;
i < 3;
i++) {
static int read_highpass(AVCodecContext *avctx, uint8_t *ptr, int plane, AVFrame *frame)
enum AVColorRange color_range
MPEG vs JPEG YUV range.
#define FF_CODEC_CAP_INIT_THREADSAFE
The codec does not modify any global variables in the init function, allowing to call the init functi...
static void free_buffers(AVCodecContext *avctx)
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 u(width, name, range_min, range_max)
static int get_bits_count(const GetBitContext *s)
This structure describes decoded (raw) audio or video data.
static av_always_inline av_const unsigned av_clip_uintp2_c(int a, int p)
Clip a signed integer to an unsigned power of two range.
@ AVCOL_RANGE_JPEG
the normal 2^n-1 "JPEG" YUV ranges
static int read_low_coeffs(AVCodecContext *avctx, int16_t *dst, int size, int width, ptrdiff_t stride)
static void skip_bits(GetBitContext *s, int n)
static av_always_inline void bytestream2_skip(GetByteContext *g, unsigned int size)
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
the pkt_dts and pkt_pts fields in AVFrame will work as usual Restrictions on codec whose streams don t reset across will not work because their bitstreams cannot be decoded in parallel *The contents of buffers must not be read before as well as code calling up to before the decode process starts Call have so the codec calls ff_thread_report set FF_CODEC_CAP_ALLOCATE_PROGRESS in AVCodec caps_internal and use ff_thread_get_buffer() to allocate frames. The frames must then be freed with ff_thread_release_buffer(). Otherwise decode directly into the user-supplied frames. Call ff_thread_report_progress() after some part of the current picture has decoded. A good place to put this is where draw_horiz_band() is called - add this if it isn 't called anywhere
int flags
AV_CODEC_FLAG_*.
int key_frame
1 -> keyframe, 0-> not
static double val(void *priv, double ch)
static void filterfn(int16_t *dest, int16_t *tmp, unsigned size, int64_t scale)
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
static int init_get_bits8(GetBitContext *s, const uint8_t *buffer, int byte_size)
Initialize GetBitContext.
#define AV_PIX_FMT_YUV420P16
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
#define AV_CODEC_CAP_FRAME_THREADS
Codec supports frame-level multithreading.
Describe the class of an AVClass context structure.
enum AVColorRange color_range
MPEG vs JPEG YUV range.
@ AV_PICTURE_TYPE_I
Intra.
static unsigned int get_bits1(GetBitContext *s)
static void postprocess_chroma(AVFrame *frame, int w, int h, int depth)
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
static int get_unary(GetBitContext *gb, int stop, int len)
Get unary code of limited length.
static av_always_inline int bytestream2_get_bytes_left(GetByteContext *g)
static av_always_inline int bytestream2_tell(GetByteContext *g)
enum AVPictureType pict_type
Picture type of the frame.
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
#define AV_CODEC_FLAG_GRAY
Only decode/encode grayscale.
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
static int read_high_coeffs(AVCodecContext *avctx, uint8_t *src, int16_t *dst, int size, int c, int a, int d, int width, ptrdiff_t stride)
SubBand band[4][NB_LEVELS *3+1]
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
static int decode_plane(AVCodecContext *avctx, int plane, AVPacket *avpkt, AVFrame *frame)
static av_cold int pixlet_init(AVCodecContext *avctx)
static void postprocess_luma(AVFrame *frame, int w, int h, int depth)
#define i(width, name, range_min, range_max)
static void lowpass_prediction(int16_t *dst, int16_t *pred, int width, int height, ptrdiff_t stride)
static unsigned int show_bits(GetBitContext *s, int n)
Show 1-25 bits.
#define FF_CODEC_CAP_INIT_CLEANUP
The codec allows calling the close function for deallocation even if the init function returned a fai...
static int pixlet_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
#define av_malloc_array(a, b)
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 default value
const char * name
Name of the codec implementation.
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
static av_cold int pixlet_close(AVCodecContext *avctx)
static const float pred[4]
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
FFmpeg Automated Testing Environment ************************************Introduction Using FATE from your FFmpeg source directory Submitting the results to the FFmpeg result aggregation server Uploading new samples to the fate suite FATE makefile targets and variables Makefile targets Makefile variables Examples Introduction **************FATE is an extended regression suite on the client side and a means for results aggregation and presentation on the server side The first part of this document explains how you can use FATE from your FFmpeg source directory to test your ffmpeg binary The second part describes how you can run FATE to submit the results to FFmpeg’s FATE server In any way you can have a look at the publicly viewable FATE results by visiting this as it can be seen if some test on some platform broke with their recent contribution This usually happens on the platforms the developers could not test on The second part of this document describes how you can run FATE to submit your results to FFmpeg’s FATE server If you want to submit your results be sure to check that your combination of OS and compiler is not already listed on the above mentioned website In the third part you can find a comprehensive listing of FATE makefile targets and variables Using FATE from your FFmpeg source directory **********************************************If you want to run FATE on your machine you need to have the samples in place You can get the samples via the build target fate rsync Use this command from the top level source this will cause FATE to fail NOTE To use a custom wrapper to run the pass ‘ target exec’ to ‘configure’ or set the TARGET_EXEC Make variable Submitting the results to the FFmpeg result aggregation server ****************************************************************To submit your results to the server you should run fate through the shell script ‘tests fate sh’ from the FFmpeg sources This script needs to be invoked with a configuration file as its first argument tests fate sh path to fate_config A configuration file template with comments describing the individual configuration variables can be found at ‘doc fate_config sh template’ Create a configuration that suits your based on the configuration template The ‘slot’ configuration variable can be any string that is not yet but it is suggested that you name it adhering to the following pattern ‘ARCH OS COMPILER COMPILER VERSION’ The configuration file itself will be sourced in a shell therefore all shell features may be used This enables you to setup the environment as you need it for your build For your first test runs the ‘fate_recv’ variable should be empty or commented out This will run everything as normal except that it will omit the submission of the results to the server The following files should be present in $workdir as specified in the configuration it may help to try out the ‘ssh’ command with one or more ‘ v’ options You should get detailed output concerning your SSH configuration and the authentication process The only thing left is to automate the execution of the fate sh script and the synchronisation of the samples directory Uploading new samples to the fate suite *****************************************If you need a sample uploaded send a mail to samples request This is for developers who have an account on the fate suite server If you upload new please make sure they are as small as space on each network bandwidth and so on benefit from smaller test cases Also keep in mind older checkouts use existing sample that means in practice generally do not remove or overwrite files as it likely would break older checkouts or releases Also all needed samples for a commit should be ideally before the push If you need an account for frequently uploading samples or you wish to help others by doing that send a mail to ffmpeg devel rsync vauL Duo ug o o w
static const uint8_t * align_get_bits(GetBitContext *s)
static void reconstruction(AVCodecContext *avctx, int16_t *dest, unsigned width, unsigned height, ptrdiff_t stride, int64_t *scaling_h, int64_t *scaling_v)
main external API structure.
static av_const int sign_extend(int val, unsigned bits)
AVCodec ff_pixlet_decoder
static int shift(int a, int b)
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(...)
This structure stores compressed data.
int64_t scaling[4][2][NB_LEVELS]
int width
picture width / height.
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
static int init_decoder(AVCodecContext *avctx)