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50 uint32_t fill = bytestream2_get_le24(gb);
51 unsigned run = bytestream2_get_byte(gb);
54 run = bytestream2_get_le32(gb);
55 for (
int j = 0; j <
run; j++,
w++) {
60 bytestream2_put_le24(pb, fill);
62 }
else if (
run == 255) {
66 for (
int j = 0; j < fill; j++,
w++) {
72 bytestream2_put_le24(pb, bytestream2_get_le24(gbp));
77 for (
int j = 0; j <
run; j++,
w++) {
82 bytestream2_put_le24(pb, fill);
94 z_stream *
const zstream = &
s->zstream.zstream;
95 const uint8_t *buf = avpkt->
data;
96 int buf_size = avpkt->
size;
102 ret = inflateReset(zstream);
107 zstream->next_in = buf;
108 zstream->avail_in = buf_size;
109 zstream->next_out =
s->decomp_buf;
110 zstream->avail_out =
s->decomp_size;
112 if (
ret != Z_STREAM_END) {
125 frame->linesize[0],
s->prev_frame->linesize[0]);
146 if (
size >= INT32_MAX)
148 s->decomp_size =
size;
#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.
static av_always_inline int bytestream2_seek(GetByteContext *g, int offset, int whence)
This structure describes decoded (raw) audio or video data.
const FFCodec ff_mwsc_decoder
static av_always_inline int bytestream2_tell_p(PutByteContext *p)
@ AV_PIX_FMT_BGR24
packed RGB 8:8:8, 24bpp, BGRBGR...
AVCodec p
The public AVCodec.
static void inflate(uint8_t *dst, const uint8_t *p1, int width, int threshold, const uint8_t *coordinates[], int coord, int maxc)
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 decode_frame(AVCodecContext *avctx, AVFrame *frame, int *got_frame, AVPacket *avpkt)
static av_always_inline void bytestream2_init_writer(PutByteContext *p, uint8_t *buf, int buf_size)
#define FF_CODEC_DECODE_CB(func)
#define AV_GET_BUFFER_FLAG_REF
The decoder will keep a reference to the frame and may reuse it later.
@ AV_PICTURE_TYPE_I
Intra.
static av_always_inline int bytestream2_get_bytes_left(GetByteContext *g)
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
int av_frame_ref(AVFrame *dst, const AVFrame *src)
Set up a new reference to the data described by the source frame.
static av_cold int decode_init(AVCodecContext *avctx)
#define AVERROR_EXTERNAL
Generic error in an external library.
static int rle_uncompress(GetByteContext *gb, PutByteContext *pb, GetByteContext *gbp, int width, int height, int stride, int pb_linesize, int gbp_linesize)
static av_cold int decode_close(AVCodecContext *avctx)
#define FF_CODEC_CAP_INIT_THREADSAFE
The codec does not modify any global variables in the init function, allowing to call the init functi...
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
const char * name
Name of the codec implementation.
void ff_inflate_end(FFZStream *zstream)
Wrapper around inflateEnd().
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
main external API structure.
static av_always_inline int bytestream2_seek_p(PutByteContext *p, int offset, int whence)
@ AV_PICTURE_TYPE_P
Predicted.
This structure stores compressed data.
int ff_inflate_init(FFZStream *zstream, void *logctx)
Wrapper around inflateInit().
int width
picture width / height.
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
#define AVERROR_INVALIDDATA
Invalid data found when processing input.