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64 1, 2, 2, 2, 3, 3, 3, 4,
65 2, 2, 2, 3, 3, 3, 4, 4,
66 2, 2, 3, 3, 3, 4, 4, 4,
67 2, 2, 3, 3, 3, 4, 4, 5,
68 2, 3, 3, 3, 4, 4, 5, 6,
69 3, 3, 3, 4, 4, 5, 6, 7,
70 3, 3, 3, 4, 4, 5, 7, 7,
71 3, 3, 4, 4, 5, 7, 7, 7,
75 1, 5, 6, 7, 8, 9, 9, 11,
76 5, 5, 7, 8, 9, 9, 11, 12,
77 6, 7, 8, 9, 9, 11, 11, 12,
78 7, 7, 8, 9, 9, 11, 12, 13,
79 7, 8, 9, 9, 10, 11, 13, 16,
80 8, 9, 9, 10, 11, 13, 16, 19,
81 8, 9, 9, 11, 12, 15, 18, 23,
82 9, 9, 11, 12, 15, 18, 23, 27
85 static const uint8_t
fic_header[7] = { 0, 0, 1,
'F',
'I',
'C',
'V' };
87 #define FIC_HEADER_SIZE 27
88 #define CURSOR_OFFSET 59
96 const unsigned t4 = 5793
U * ((int)(t2 + t0 + 0x800) >> 12);
97 const unsigned t5 = 5793
U * ((int)(t3 + t1 + 0x800) >> 12);
98 const unsigned t6 = t2 - t0;
99 const unsigned t7 = t3 - t1;
100 const unsigned t8 = 17734 *
blk[2 *
step] - 42813 *
blk[6 *
step];
101 const unsigned t9 = 17734 *
blk[6 *
step] + 42814 *
blk[2 *
step];
120 fic_idct(ptr++, 8, 13, (1 << 12) + (1 << 17));
121 for (
i = 1;
i < 8;
i++) {
127 for (
i = 0;
i < 8;
i++) {
133 for (j = 0; j < 8; j++) {
134 for (
i = 0;
i < 8;
i++)
160 for (
i = 0;
i < num_coeff;
i++) {
162 if (v < -2048 || v > 2048)
178 const uint8_t *
src = tctx->
src;
181 int y_off = tctx->
y_off;
188 for (p = 0; p < 3; p++) {
190 uint8_t*
dst =
ctx->frame->data[p] + (y_off >> !!p) *
stride;
192 for (y = 0; y < (slice_h >> !!p); y += 8) {
193 for (x = 0; x < (
ctx->aligned_width >> !!p); x += 8) {
220 uint8_t *ptr =
ctx->cursor_buf;
227 for (
i = 0;
i < 1024;
i++) {
228 planes[0][
i] = (( 25 * ptr[0] + 129 * ptr[1] + 66 * ptr[2]) / 255) + 16;
229 planes[1][
i] = ((-38 * ptr[0] + 112 * ptr[1] + -74 * ptr[2]) / 255) + 128;
230 planes[2][
i] = ((-18 * ptr[0] + 112 * ptr[1] + -94 * ptr[2]) / 255) + 128;
237 for (
i = 0;
i < 32;
i += 2)
238 for (j = 0; j < 32; j += 2)
239 for (p = 0; p < 3; p++)
241 planes[p + 1][32 *
i + j + 1] +
242 planes[p + 1][32 * (
i + 1) + j ] +
243 planes[p + 1][32 * (
i + 1) + j + 1]) / 4;
246 for (
i = 0;
i < 3;
i++)
247 dstptr[
i] =
ctx->final_frame->data[
i] +
248 (
ctx->final_frame->linesize[
i] * (cur_y >> !!
i)) +
249 (cur_x >> !!
i) + !!
i;
254 int csize = lsize / 2;
265 dstptr[0] +=
ctx->final_frame->linesize[0] * 2;
266 dstptr[1] +=
ctx->final_frame->linesize[1];
267 dstptr[2] +=
ctx->final_frame->linesize[2];
275 const uint8_t *
src = avpkt->
data;
281 int skip_cursor =
ctx->skip_cursor;
282 const uint8_t *sdata;
299 if (!
ctx->final_frame) {
319 "Packet is too small to contain cursor (%d vs %d bytes).\n",
327 if (!skip_cursor && tsize < 32) {
329 "Cursor data too small. Skipping cursor.\n");
336 if (!skip_cursor && (cur_x > avctx->
width || cur_y > avctx->
height)) {
338 "Invalid cursor position: (%d,%d). Skipping cursor.\n",
345 "Invalid cursor size. Skipping cursor.\n");
354 ctx->slice_h = 16 * (
ctx->aligned_height >> 4) / nslices;
355 if (
ctx->slice_h % 16)
362 if (msize <= ctx->aligned_width/8 * (
ctx->aligned_height/8) / 8) {
369 nslices *
sizeof(
ctx->slice_data[0]));
370 if (!
ctx->slice_data_size) {
374 memset(
ctx->slice_data, 0, nslices *
sizeof(
ctx->slice_data[0]));
376 for (slice = 0; slice < nslices; slice++) {
379 int y_off =
ctx->slice_h * slice;
380 int slice_h =
ctx->slice_h;
386 if (slice == nslices - 1) {
391 if (slice_size < slice_off)
395 if (slice_size < slice_off || slice_size > msize)
398 slice_size -= slice_off;
400 ctx->slice_data[slice].src = sdata + slice_off;
401 ctx->slice_data[slice].src_size = slice_size;
402 ctx->slice_data[slice].slice_h = slice_h;
403 ctx->slice_data[slice].y_off = y_off;
407 NULL, nslices,
sizeof(
ctx->slice_data[0]))) < 0)
412 for (slice = 0; slice < nslices; slice++) {
413 if (
ctx->slice_data[slice].p_frame) {
421 if (!
ctx->final_frame) {
#define AV_LOG_WARNING
Something somehow does not look correct.
static int get_bits_left(GetBitContext *gb)
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
static int fic_decode_frame(AVCodecContext *avctx, AVFrame *rframe, int *got_frame, AVPacket *avpkt)
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
static const AVClass fic_decoder_class
This structure describes decoded (raw) audio or video data.
trying all byte sequences megabyte in length and selecting the best looking sequence will yield cases to try But a word about which is also called distortion Distortion can be quantified by almost any quality measurement one chooses the sum of squared differences is used but more complex methods that consider psychovisual effects can be used as well It makes no difference in this discussion First step
static int fic_decode_slice(AVCodecContext *avctx, void *tdata)
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
static av_cold int fic_decode_init(AVCodecContext *avctx)
AVCodec p
The public AVCodec.
enum AVPictureType cur_frame_type
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
#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_FRAME_FLAG_KEY
A flag to mark frames that are keyframes.
static av_cold int fic_decode_close(AVCodecContext *avctx)
static const AVOption options[]
#define FF_CODEC_DECODE_CB(func)
int flags
Flags modifying the (de)muxer behaviour.
static void fic_idct_put(uint8_t *dst, int stride, int16_t *block)
int bits_per_raw_sample
Bits per sample/pixel of internal libavcodec pixel/sample format.
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
static const uint8_t fic_header[7]
AVFrame * av_frame_clone(const AVFrame *src)
Create a new frame that references the same data as src.
@ AV_PIX_FMT_YUV420P
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
static int get_se_golomb(GetBitContext *gb)
read signed exp golomb code.
#define CODEC_LONG_NAME(str)
static const uint8_t fic_qmat_hq[64]
#define LIBAVUTIL_VERSION_INT
Describe the class of an AVClass context structure.
const char * av_default_item_name(void *ptr)
Return the context name.
@ AV_PICTURE_TYPE_I
Intra.
static unsigned int get_bits1(GetBitContext *s)
FICThreadContext * slice_data
int(* init)(AVBSFContext *ctx)
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
int av_frame_ref(AVFrame *dst, const AVFrame *src)
Set up a new reference to the data described by the source frame.
#define DECLARE_ALIGNED(n, t, v)
static int shift(int a, int b)
uint8_t ptrdiff_t const uint8_t ptrdiff_t int intptr_t intptr_t int int16_t * dst
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
#define AV_CODEC_CAP_SLICE_THREADS
Codec supports slice-based (or partition-based) multithreading.
static void fic_draw_cursor(AVCodecContext *avctx, int cur_x, int cur_y)
#define i(width, name, range_min, range_max)
static av_always_inline void fic_idct(int16_t *blk, int step, int shift, int rnd)
#define AV_OPT_FLAG_VIDEO_PARAM
const char * name
Name of the codec implementation.
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
static const uint8_t fic_qmat_lq[64]
const uint8_t ff_zigzag_direct[64]
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 * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
static av_always_inline void fic_alpha_blend(uint8_t *dst, uint8_t *src, int size, uint8_t *alpha)
main external API structure.
int(* execute)(struct AVCodecContext *c, int(*func)(struct AVCodecContext *c2, void *arg), void *arg2, int *ret, int count, int size)
The codec may call this to execute several independent things.
static const struct @457 planes[]
#define AV_OPT_FLAG_DECODING_PARAM
A generic parameter which can be set by the user for demuxing or decoding.
@ AV_PICTURE_TYPE_P
Predicted.
static const int16_t alpha[]
This structure stores compressed data.
static int fic_decode_block(FICContext *ctx, GetBitContext *gb, uint8_t *dst, int stride, int16_t *block, int *is_p)
@ AV_OPT_TYPE_BOOL
Underlying C type is int.
void av_fast_malloc(void *ptr, unsigned int *size, size_t min_size)
Allocate a buffer, reusing the given one if large enough.
int width
picture width / height.
The exact code depends on how similar the blocks are and how related they are to the block
const FFCodec ff_fic_decoder
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
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_RB24
static void BS_FUNC() skip(BSCTX *bc, unsigned int n)
Skip n bits in the buffer.