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28 #define ALIAS_HEADER_SIZE 10
36 #if FF_API_CODED_FRAME
72 bytestream_put_be16(&buf,
width);
73 bytestream_put_be16(&buf,
height);
74 bytestream_put_be32(&buf, 0);
75 bytestream_put_be16(&buf, bits_pixel);
77 for (j = 0; j <
height; j++) {
78 in_buf =
frame->data[0] +
frame->linesize[0] * j;
85 while (count < 255 && count +
i <
width &&
pixel == *in_buf) {
89 bytestream_put_byte(&buf, count);
90 bytestream_put_byte(&buf,
pixel);
93 while (count < 255 && count +
i <
width &&
98 bytestream_put_byte(&buf, count);
99 bytestream_put_be24(&buf,
pixel);
#define FF_ENABLE_DEPRECATION_WARNINGS
AVPixelFormat
Pixel format.
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 int encode_frame(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *frame, int *got_packet)
This structure describes decoded (raw) audio or video data.
@ AV_PIX_FMT_BGR24
packed RGB 8:8:8, 24bpp, BGRBGR...
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
void av_shrink_packet(AVPacket *pkt, int size)
Reduce packet size, correctly zeroing padding.
#define ALIAS_HEADER_SIZE
int key_frame
1 -> keyframe, 0-> not
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
AVCodec ff_alias_pix_encoder
@ AV_PICTURE_TYPE_I
Intra.
@ AV_PIX_FMT_GRAY8
Y , 8bpp.
enum AVPictureType pict_type
Picture type of the frame.
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
int flags
A combination of AV_PKT_FLAG values.
#define i(width, name, range_min, range_max)
const char * name
Name of the codec implementation.
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
attribute_deprecated AVFrame * coded_frame
the picture in the bitstream
main external API structure.
#define FF_DISABLE_DEPRECATION_WARNINGS
This structure stores compressed data.
int width
picture width / height.
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_WB32 unsigned int_TMPL AV_RB24
int ff_alloc_packet2(AVCodecContext *avctx, AVPacket *avpkt, int64_t size, int64_t min_size)
Check AVPacket size and/or allocate data.