30 #define FRAME_HEADER_SIZE 64 33 #define SUBSAMPLE_420 0 34 #define SUBSAMPLE_422 1 35 #define YUVORDER_YUYV 0 36 #define YUVORDER_UYVY 1 37 #define NOT_COMPRESSED 0 39 #define NO_DECIMATION 0 40 #define DECIMATION_ENAB 1 63 uint8_t *y, *
u, *v, *y_end, *u_end, *v_end;
109 i++, src += linelength, src_size -= linelength
115 if (src_size < linelength) {
120 if (src[linelength - 1] !=
EOL) {
122 av_log(avctx,
AV_LOG_WARNING,
"Wrong line length %d or line not terminated properly (found 0x%02x)!\n", linelength, src[linelength - 1]);
140 for (j = 0; j < linelength - 1; j++) {
146 if ((src[j] & 1) && header[28] ==
COMPRESSED) {
160 for (j = 0; j < linelength - 4; ) {
161 if (y + 1 > y_end || u > u_end || v > v_end) {
166 if ((src[j] & 1) && header[28] ==
COMPRESSED) {
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
This structure describes decoded (raw) audio or video data.
ptrdiff_t const GLvoid * data
#define AV_LOG_WARNING
Something somehow does not look correct.
static av_cold int init(AVCodecContext *avctx)
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
#define EOL
End Of Line marker.
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
#define MAGIC_0
First header byte.
#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.
#define FRAME_HEADER_SIZE
static int cpia_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
int av_frame_ref(AVFrame *dst, const AVFrame *src)
Set up a new reference to the data described by the source frame.
#define u(width, name, range_min, range_max)
bitstream reader API header.
static const uint8_t header[24]
#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.
static av_cold int cpia_decode_init(AVCodecContext *avctx)
#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.
static av_cold int cpia_decode_end(AVCodecContext *avctx)
enum AVPictureType pict_type
Picture type of the frame.
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
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Libavcodec external API header.
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
main external API structure.
#define FF_DECODE_ERROR_INVALID_BITSTREAM
int decode_error_flags
decode error flags of the frame, set to a combination of FF_DECODE_ERROR_xxx flags if the decoder pro...
void avpriv_report_missing_feature(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
common internal api header.
#define MAGIC_1
Second header byte.
int key_frame
1 -> keyframe, 0-> not
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.
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators...