85 if (!
ctx->inflated_buf)
98 for (
i = 0;
i < bytewidth;
i++)
109 uLongf length =
ctx->inflated_size;
110 int keyframe, component_size, src_linesize;
114 if (avpkt->
size < 3) {
121 keyframe = avpkt->
data[0] & 1;
124 component_size = ((avpkt->
data[1] >> 2) & 0x03) + 1;
125 switch (component_size) {
142 ret = uncompress(
ctx->inflated_buf, &length,
154 src_linesize =
FFALIGN(avctx->
width * component_size, 4);
159 ctx->current->linesize[0] * (avctx->
height - 1),
160 -1 *
ctx->current->linesize[0],
161 ctx->inflated_buf, src_linesize,
166 ctx->inflated_buf, src_linesize,
187 .
name =
"screenpresso",
Libavcodec external API header.
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.
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
@ AV_CODEC_ID_SCREENPRESSO
#define AVERROR_UNKNOWN
Unknown error, typically from an external library.
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
int av_frame_ref(AVFrame *dst, const AVFrame *src)
Set up a new reference to the data described by the source frame.
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
int av_image_check_size(unsigned int w, unsigned int h, int log_offset, void *log_ctx)
Check if the given dimension of an image is valid, meaning that all bytes of the image can be address...
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.
@ AV_PICTURE_TYPE_I
Intra.
@ AV_PICTURE_TYPE_P
Predicted.
#define FF_CODEC_CAP_INIT_THREADSAFE
The codec does not modify any global variables in the init function, allowing to call the init functi...
#define FF_CODEC_CAP_INIT_CLEANUP
The codec allows calling the close function for deallocation even if the init function returned a fai...
common internal API header
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Memory handling functions.
@ AV_PIX_FMT_BGR0
packed BGR 8:8:8, 32bpp, BGRXBGRX... X=unused/undefined
@ AV_PIX_FMT_RGB555LE
packed RGB 5:5:5, 16bpp, (msb)1X 5R 5G 5B(lsb), little-endian, X=unused/undefined
@ AV_PIX_FMT_BGR24
packed RGB 8:8:8, 24bpp, BGRBGR...
static void sum_delta_flipped(uint8_t *dst, int dst_linesize, const uint8_t *src, int src_linesize, int bytewidth, int height)
static av_cold int screenpresso_close(AVCodecContext *avctx)
static av_cold int screenpresso_init(AVCodecContext *avctx)
static int screenpresso_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
AVCodec ff_screenpresso_decoder
main external API structure.
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
int width
picture width / height.
const char * name
Name of the codec implementation.
This structure describes decoded (raw) audio or video data.
int key_frame
1 -> keyframe, 0-> not
enum AVPictureType pict_type
Picture type of the frame.
This structure stores compressed data.