62 unsigned char *dst = frame->
data[0];
72 static void cmv_motcomp(
unsigned char *dst, ptrdiff_t dst_stride,
73 const unsigned char *
src, ptrdiff_t src_stride,
75 int xoffset,
int yoffset,
82 if (i+xoffset>=0 && i+xoffset<width &&
83 j+yoffset>=0 && j+yoffset<height) {
84 dst[j*dst_stride +
i] = src[(j+yoffset)*src_stride + i+xoffset];
86 dst[j*dst_stride +
i] = 0;
99 for(x=0; x<s->
avctx->
width/4 && buf_end - buf >
i; x++) {
101 unsigned char *dst = frame->
data[0] + (y*4)*frame->
linesize[0] + x*4;
102 if (raw+16<buf_end && *raw==0xFF) {
105 memcpy(dst + frame->
linesize[0], raw+4, 4);
106 memcpy(dst + 2 * frame->
linesize[0], raw+8, 4);
107 memcpy(dst + 3 * frame->
linesize[0], raw+12, 4);
109 }
else if(raw<buf_end) {
110 int xoffset = (*raw & 0xF) - 7;
111 int yoffset = ((*raw >> 4)) - 7;
119 int xoffset = (buf[
i] & 0xF) - 7;
120 int yoffset = ((buf[
i] >> 4)) - 7;
132 int pal_start, pal_count,
i,
ret, fps;
134 if(buf_end - buf < 16) {
160 for (i=pal_start; i<pal_start+pal_count && i<
AVPALETTE_COUNT && buf_end - buf >= 3; i++) {
168 #define EA_PREAMBLE_SIZE 8 169 #define MVIh_TAG MKTAG('M', 'V', 'I', 'h') 172 void *
data,
int *got_frame,
176 int buf_size = avpkt->
size;
178 const uint8_t *buf_end = buf + buf_size;
#define FF_CODEC_CAP_INIT_CLEANUP
The codec allows calling the close function for deallocation even if the init function returned a fai...
#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.
int ff_set_dimensions(AVCodecContext *s, int width, int height)
Check that the provided frame dimensions are valid and set them on the codec context.
static av_cold int init(AVCodecContext *avctx)
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
void av_frame_move_ref(AVFrame *dst, AVFrame *src)
Move everything contained in src to dst and reset src.
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)
unsigned int palette[AVPALETTE_COUNT]
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
8 bits with AV_PIX_FMT_RGB32 palette
static int cmv_process_header(CmvContext *s, const uint8_t *buf, const uint8_t *buf_end)
int av_frame_ref(AVFrame *dst, const AVFrame *src)
Set up a new reference to the data described by the source frame.
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_RB32
static void cmv_motcomp(unsigned char *dst, ptrdiff_t dst_stride, const unsigned char *src, ptrdiff_t src_stride, int x, int y, int xoffset, int yoffset, int width, int height)
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
const char * name
Name of the codec implementation.
static void cmv_decode_inter(CmvContext *s, AVFrame *frame, const uint8_t *buf, const uint8_t *buf_end)
static av_cold int cmv_decode_init(AVCodecContext *avctx)
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...
enum AVPictureType pict_type
Picture type of the frame.
static int cmv_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
int width
picture width / height.
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
Libavcodec external API header.
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 linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
main external API structure.
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Rational number (pair of numerator and denominator).
static void cmv_decode_intra(CmvContext *s, AVFrame *frame, const uint8_t *buf, const uint8_t *buf_end)
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
AVFrame * last2_frame
second-last
common internal api header.
common internal and external API header
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
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
This structure stores compressed data.
static av_cold int cmv_decode_end(AVCodecContext *avctx)
#define AV_GET_BUFFER_FLAG_REF
The decoder will keep a reference to the frame and may reuse it later.
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.