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93 s->unrestricted_mv = 1;
94 s->h263_long_vectors = 0;
108 s->h263_flv - 1,
s->qscale,
s->picture_number);
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
const uint8_t ff_mpeg1_dc_scale_table[128]
#define FF_DEBUG_PICT_INFO
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
#define FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM
The decoder extracts and fills its parameters even if the frame is skipped due to the skip_frame sett...
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
static enum AVPixelFormat pix_fmts[]
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
@ AV_PIX_FMT_YUV420P
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
const AVCodec ff_flv_decoder
Rational number (pair of numerator and denominator).
@ AV_PICTURE_TYPE_I
Intra.
int ff_flv_decode_picture_header(MpegEncContext *s)
#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.
static void skip_bits1(GetBitContext *s)
char av_get_picture_type_char(enum AVPictureType pict_type)
Return a single letter to describe the given picture type pict_type.
int ff_h263_decode_init(AVCodecContext *avctx)
int ff_h263_decode_end(AVCodecContext *avctx)
const char * name
Name of the codec implementation.
static int skip_1stop_8data_bits(GetBitContext *gb)
@ AV_PICTURE_TYPE_P
Predicted.
int ff_h263_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
#define AV_CODEC_CAP_DRAW_HORIZ_BAND
Decoder can use draw_horiz_band callback.
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
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...