31 #define MAX_HUFF_CODES 16 73 int w4 = (avctx->
width + 3) & ~3;
74 int h4 = (avctx->
height + 3) & ~3;
95 #if !CONFIG_HARDCODED_TABLES 123 for (i = 0; i <
w; ++
i)
215 while (x < mp->avctx->width) {
222 for (i = (x + 3) & ~3; i < x +
w; i += 4) {
232 p.
y = av_clip_uintp2(p.
y, 5);
236 p.
v = av_clip_intp2(p.
v, 5);
238 p.
u = av_clip_intp2(p.
u, 5);
264 p.
y = av_clip_uintp2(p.
y, 5);
267 p.
v = av_clip_intp2(p.
v, 5);
269 p.
u = av_clip_intp2(p.
u, 5);
275 for (y0 = 0; y0 < 2; ++y0)
281 void *
data,
int *got_frame,
285 int buf_size = avpkt->
size;
288 int i, count1, count2, sz,
ret;
300 memcpy(mp->
bswapbuf + (buf_size & ~3), buf + (buf_size & ~3), buf_size & 3);
304 for (i = !(avctx->
extradata[1] & 2); i < 2; ++i) {
349 .
name =
"motionpixels",
#define FF_CODEC_CAP_INIT_CLEANUP
The codec allows calling the close function for deallocation even if the init function returned a fai...
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
This structure describes decoded (raw) audio or video data.
ptrdiff_t const GLvoid * data
static int mp_get_code(MotionPixelsContext *mp, GetBitContext *gb, int size)
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
static av_cold int init(AVCodecContext *avctx)
AVCodec ff_motionpixels_decoder
static av_always_inline int mp_gradient(MotionPixelsContext *mp, int component, int v)
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
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 decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
#define FF_CODEC_CAP_INIT_THREADSAFE
The codec does not modify any global variables in the init function, allowing to call the init functi...
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
static const uint32_t color[16+AV_CLASS_CATEGORY_NB]
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
static av_cold int end(AVCodecContext *avctx)
int av_frame_ref(AVFrame *dst, const AVFrame *src)
Set up a new reference to the data described by the source frame.
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
static YuvPixel mp_get_yuv_from_rgb(MotionPixelsContext *mp, int x, int y)
bitstream reader API header.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
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 * name
Name of the codec implementation.
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
static int mp_yuv_to_rgb(int y, int v, int u, int clip_rgb)
int width
picture width / height.
static int mp_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
static av_always_inline int get_vlc2(GetBitContext *s, VLC_TYPE(*table)[2], int bits, int max_depth)
Parse a vlc code.
static av_cold void motionpixels_tableinit(void)
static void mp_decode_frame_helper(MotionPixelsContext *mp, GetBitContext *gb)
static av_cold int mp_decode_init(AVCodecContext *avctx)
Libavcodec external API header.
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
main external API structure.
HuffCode codes[MAX_HUFF_CODES]
static unsigned int get_bits1(GetBitContext *s)
int ff_init_vlc_from_lengths(VLC *vlc_arg, 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()
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
static av_always_inline int mp_get_vlc(MotionPixelsContext *mp, GetBitContext *gb)
static unsigned int get_bits_long(GetBitContext *s, int n)
Read 0-32 bits.
uint8_t gradient_scale[3]
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
static void mp_decode_line(MotionPixelsContext *mp, GetBitContext *gb, int y)
common internal api header.
static void mp_read_changes_map(MotionPixelsContext *mp, GetBitContext *gb, int count, int bits_len, int read_color)
#define AV_PIX_FMT_RGB555
av_cold void ff_bswapdsp_init(BswapDSPContext *c)
static void mp_set_rgb_from_yuv(MotionPixelsContext *mp, int x, int y, const YuvPixel *p)
static av_cold int mp_decode_end(AVCodecContext *avctx)
static int ff_thread_once(char *control, void(*routine)(void))
VLC_TYPE(* table)[2]
code, bits
static int mp_read_codes_table(MotionPixelsContext *mp, GetBitContext *gb)
static YuvPixel mp_rgb_yuv_table[1<< 15]
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
This structure stores compressed data.
void ff_free_vlc(VLC *vlc)
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
void * av_mallocz_array(size_t nmemb, size_t size)