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42 int i, src_stride =
FFALIGN(linelen, 4);
43 uint8_t *dst =
f->data[0];
44 dst += (
height - 1) *
f->linesize[0];
46 memcpy(dst,
src, linelen);
48 dst -=
f->linesize[0];
55 int i, j, src_stride =
FFALIGN(linelen, 4);
56 uint8_t *dst =
f->data[0];
57 dst += (
height - 1) *
f->linesize[0];
59 for (j = linelen; j; j--)
61 src += src_stride - linelen;
62 dst -=
f->linesize[0] + linelen;
69 const uint8_t *buf = avpkt->
data;
70 int buf_size = avpkt->
size;
86 switch ((buf[0] >> 1) & 7) {
88 int outlen =
c->decomp_size, inlen = buf_size - 2;
89 if (
av_lzo1x_decode(
c->decomp_buf, &outlen, &buf[2], &inlen) || (outlen && outlen != bugdelta)) {
97 unsigned long dlen =
c->decomp_size;
98 if (uncompress(
c->decomp_buf, &dlen, &buf[2], buf_size - 2) != Z_OK || (dlen !=
c->decomp_size && dlen !=
c->decomp_size - bugdelta)) {
118 c->linelen,
c->height);
123 c->linelen,
c->height);
143 "CamStudio codec error: invalid depth %i bpp\n",
151 c->decomp_size =
c->height *
stride;
153 if (!
c->decomp_buf) {
172 .
p.
name =
"camstudio",
static av_cold int decode_end(AVCodecContext *avctx)
#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
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
This structure describes decoded (raw) audio or video data.
@ AV_PIX_FMT_BGR24
packed RGB 8:8:8, 24bpp, BGRBGR...
AVCodec p
The public AVCodec.
static av_cold int decode_init(AVCodecContext *avctx)
const FFCodec ff_cscd_decoder
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.
#define AV_FRAME_FLAG_KEY
A flag to mark frames that are keyframes.
static void copy_frame_default(AVFrame *f, const uint8_t *src, int linelen, int height)
#define FF_CODEC_DECODE_CB(func)
unsigned char * decomp_buf
int(* init)(AVBSFContext *ctx)
static void add_frame_default(AVFrame *f, const uint8_t *src, int linelen, int height)
#define CODEC_LONG_NAME(str)
@ AV_PICTURE_TYPE_I
Intra.
@ AV_PIX_FMT_BGR0
packed BGR 8:8:8, 32bpp, BGRXBGRX... X=unused/undefined
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
int av_lzo1x_decode(void *out, int *outlen, const void *in, int *inlen)
Decodes LZO 1x compressed data.
#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.
int bits_per_coded_sample
bits per sample/pixel from the demuxer (needed for huffyuv).
@ AV_PIX_FMT_RGB555LE
packed RGB 5:5:5, 16bpp, (msb)1X 5R 5G 5B(lsb), little-endian, X=unused/undefined
#define i(width, name, range_min, range_max)
#define AV_LZO_OUTPUT_PADDING
const char * name
Name of the codec implementation.
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
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.
static int decode_frame(AVCodecContext *avctx, AVFrame *rframe, int *got_frame, AVPacket *avpkt)
main external API structure.
@ AV_PICTURE_TYPE_P
Predicted.
This structure stores compressed data.
int width
picture width / height.
#define AVERROR_INVALIDDATA
Invalid data found when processing input.