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33 #define MAX_HUFF_CODES 16
75 int w4 = (avctx->
width + 3) & ~3;
76 int h4 = (avctx->
height + 3) & ~3;
89 if (!
mp->changes_map || !
mp->vpt || !
mp->hpt)
97 #if !CONFIG_HARDCODED_TABLES
117 if (y >=
mp->avctx->height)
121 pixels = (uint16_t *)&
mp->frame->data[0][y *
mp->frame->linesize[0] + x * 2];
125 for (
i = 0;
i <
w; ++
i)
128 pixels +=
mp->frame->linesize[0] / 2;
137 if (
size >
mp->max_codes_bits) {
144 if (
mp->current_codes_count >=
mp->codes_count) {
149 mp->codes[
mp->current_codes_count++].size =
size;
155 if (
mp->codes_count == 1) {
162 for (
i = 0;
i <
mp->codes_count; ++
i)
164 mp->current_codes_count = 0;
167 if (
mp->current_codes_count <
mp->codes_count) {
179 delta = (v - 7) *
mp->gradient_scale[component];
180 mp->gradient_scale[component] = (v == 0 || v == 14) ? 2 : 1;
188 color = *(uint16_t *)&
mp->frame->data[0][y *
mp->frame->linesize[0] + x * 2];
197 *(uint16_t *)&
mp->frame->data[0][y *
mp->frame->linesize[0] + x * 2] =
color;
202 return mp->vlc.table ?
get_vlc2(gb,
mp->vlc.table,
mp->max_codes_bits, 1)
203 :
mp->codes[0].delta;
209 const int y0 = y *
mp->avctx->width;
213 if (
mp->changes_map[y0 + x] == 0) {
214 memset(
mp->gradient_scale, 1,
sizeof(
mp->gradient_scale));
217 while (x < mp->avctx->width) {
218 w =
mp->changes_map[y0 + x];
221 if (
mp->changes_map[y0 + x +
mp->avctx->width] <
w ||
222 mp->changes_map[y0 + x +
mp->avctx->width * 2] <
w ||
223 mp->changes_map[y0 + x +
mp->avctx->width * 3] <
w) {
224 for (
i = (x + 3) & ~3;
i < x +
w;
i += 4) {
230 memset(
mp->gradient_scale, 1,
sizeof(
mp->gradient_scale));
241 mp->hpt[((y / 4) *
mp->avctx->width + x) / 4] = p;
243 p.
v =
mp->hpt[((y / 4) *
mp->avctx->width + x) / 4].v;
244 p.
u =
mp->hpt[((y / 4) *
mp->avctx->width + x) / 4].u;
260 for (y = 0; y <
mp->avctx->height; ++y) {
261 if (
mp->changes_map[y *
mp->avctx->width] != 0) {
262 memset(
mp->gradient_scale, 1,
sizeof(
mp->gradient_scale));
277 for (y0 = 0; y0 < 2; ++y0)
278 for (y = y0; y <
mp->avctx->height; y += 2)
285 const uint8_t *buf = avpkt->
data;
286 int buf_size = avpkt->
size;
289 int i, count1, count2, sz,
ret;
298 mp->bdsp.bswap_buf((uint32_t *)
mp->bswapbuf, (
const uint32_t *) buf,
301 memcpy(
mp->bswapbuf + (buf_size & ~3), buf + (buf_size & ~3), buf_size & 3);
313 if (
mp->codes_count == 0)
316 if (
mp->changes_map[0] == 0) {
317 *(uint16_t *)
mp->frame->data[0] =
get_bits(&gb, 15);
318 mp->changes_map[0] = 1;
329 if (
mp->codes_count > 1) {
333 &
mp->codes[
mp->codes_count - 1].size, -(
int)
sizeof(
HuffCode),
334 &
mp->codes[
mp->codes_count - 1].delta, -(
int)
sizeof(
HuffCode), 1,
350 .
p.
name =
"motionpixels",
int ff_vlc_init_from_lengths(VLC *vlc, int nb_bits, int nb_codes, const int8_t *lens, int lens_wrap, const void *symbols, int symbols_wrap, int symbols_size, int offset, int flags, void *logctx)
Build VLC decoding tables suitable for use with get_vlc2()
#define FF_CODEC_CAP_INIT_CLEANUP
The codec allows calling the close function for deallocation even if the init function returned a fai...
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 unsigned int get_bits_long(GetBitContext *s, int n)
Read 0-32 bits.
uint8_t gradient_scale[3]
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
static double mp(int i, double w0, double r)
This structure describes decoded (raw) audio or video data.
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
AVCodec p
The public AVCodec.
static av_cold int mp_decode_init(AVCodecContext *avctx)
static void mp_read_changes_map(MotionPixelsContext *mp, GetBitContext *gb, int count, int bits_len, int read_color)
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
static int mp_yuv_to_rgb(int y, int v, int u, int clip_rgb)
static int ff_thread_once(char *control, void(*routine)(void))
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
static YuvPixel mp_get_yuv_from_rgb(MotionPixelsContext *mp, int x, int y)
#define FF_CODEC_DECODE_CB(func)
#define CODEC_LONG_NAME(str)
static av_cold void motionpixels_tableinit(void)
av_cold void ff_bswapdsp_init(BswapDSPContext *c)
static void mp_decode_frame_helper(MotionPixelsContext *mp, GetBitContext *gb)
@ AV_CODEC_ID_MOTIONPIXELS
static av_always_inline int mp_gradient(MotionPixelsContext *mp, int component, int v)
static unsigned int get_bits1(GetBitContext *s)
static int mp_decode_frame(AVCodecContext *avctx, AVFrame *rframe, int *got_frame, AVPacket *avpkt)
static av_always_inline int get_vlc2(GetBitContext *s, const VLCElem *table, int bits, int max_depth)
Parse a vlc code.
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.
static const uint32_t color[16+AV_CLASS_CATEGORY_NB]
static av_always_inline int mp_get_vlc(MotionPixelsContext *mp, GetBitContext *gb)
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
#define i(width, name, range_min, range_max)
uint8_t * extradata
Out-of-band global headers that may be used by some codecs.
static YuvPixel mp_rgb_yuv_table[1<< 15]
static int mp_get_code(MotionPixelsContext *mp, GetBitContext *gb, int size)
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
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...
#define AV_PIX_FMT_RGB555
static void mp_set_rgb_from_yuv(MotionPixelsContext *mp, int x, int y, const YuvPixel *p)
HuffCode codes[MAX_HUFF_CODES]
static int mp_read_codes_table(MotionPixelsContext *mp, GetBitContext *gb)
const char * name
Name of the codec implementation.
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
void * av_calloc(size_t nmemb, size_t size)
void ff_vlc_free(VLC *vlc)
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.
main external API structure.
static void mp_decode_line(MotionPixelsContext *mp, GetBitContext *gb, int y)
This structure stores compressed data.
int width
picture width / height.
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
const FFCodec ff_motionpixels_decoder
static av_cold int mp_decode_end(AVCodecContext *avctx)