31 #define BITSTREAM_READER_LE 52 uint16_t nb_vectors, intra_flag;
61 nb_vectors = bytestream2_get_le16(gb);
62 intra_flag = !!bytestream2_get_le16(gb);
64 nb_blocks = (avctx->
width / 2) * (avctx->
height / 2);
66 int ret, skip_linesize, padding;
68 nb_blocks = bytestream2_get_le32(gb);
69 skip_linesize = avctx->
width >> 1;
83 for (
int y = 0; y < avctx->
height >> 2; y++) {
84 for (
int x = 0; x < avctx->
width >> 2; x++) {
87 skip[(y*2) *skip_linesize + x*2 ] = flag;
88 skip[(y*2) *skip_linesize + x*2+1] = flag;
89 skip[(y*2+1)*skip_linesize + x*2 ] = flag;
90 skip[(y*2+1)*skip_linesize + x*2+1] = flag;
100 if (nb_vectors > 256) {
109 for (
int y = avctx->
height - 2; y >= 0; y -= 2) {
114 for (
int x = 0; x < avctx->
width; x += 2) {
117 if (!intra_flag && *skip++)
121 if (nb_vectors <= 256) {
122 idx = bytestream2_get_byte(gb);
125 idx9val = bytestream2_get_byte(&idx9);
129 idx = bytestream2_get_byte(gb) | (((idx9val >> (7 - idx9bits)) & 1) << 8);
131 if (idx >= nb_vectors)
134 dsty[x +frame->
linesize[0]] = vec[idx * 12 + 0];
135 dsty[x+1+frame->
linesize[0]] = vec[idx * 12 + 3];
136 dsty[x] = vec[idx * 12 + 6];
137 dsty[x+1] = vec[idx * 12 + 9];
139 dstu[x +frame->
linesize[1]] = vec[idx * 12 + 1];
140 dstu[x+1+frame->
linesize[1]] = vec[idx * 12 + 4];
141 dstu[x] = vec[idx * 12 + 7];
142 dstu[x+1] = vec[idx * 12 +10];
144 dstv[x +frame->
linesize[2]] = vec[idx * 12 + 2];
145 dstv[x+1+frame->
linesize[2]] = vec[idx * 12 + 5];
146 dstv[x] = vec[idx * 12 + 8];
147 dstv[x+1] = vec[idx * 12 +11];
160 int op = bytestream2_get_le16(gb);
162 for (
int i = 0;
i < 16;
i++) {
164 int s0 = bytestream2_get_byte(gb);
165 int s1 = bytestream2_get_byte(gb);
166 int offset = ((s0 & 0xF0) << 4) |
s1;
167 int length = (s0 & 0xF) + 3;
169 if (dst + length > dst_end ||
170 dst - offset < dst_start)
173 for (
int j = 0; j <
length; j++) {
181 *dst++ = bytestream2_get_byte(gb);
187 return dst - dst_start;
198 if (avpkt->
size <= 13)
203 uncompressed = bytestream2_get_le32(gb);
#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
static void flush(AVCodecContext *avctx)
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Memory handling functions.
static void skip_bits_long(GetBitContext *s, int n)
Skips the specified number of bits.
static av_cold int init(AVCodecContext *avctx)
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size)
Same behaviour av_fast_malloc but the buffer has additional AV_INPUT_BUFFER_PADDING_SIZE at the end w...
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
void * av_calloc(size_t nmemb, size_t size)
Non-inlined equivalent of av_mallocz_array().
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf offset
int av_frame_ref(AVFrame *dst, const AVFrame *src)
Set up a new reference to the data described by the source frame.
bitstream reader API header.
static av_always_inline int bytestream2_get_bytes_left(GetByteContext *g)
static av_cold int decode_close(AVCodecContext *avctx)
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
static const uint16_t mask[17]
static av_always_inline void bytestream2_skip(GetByteContext *g, unsigned int size)
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. ...
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.
common internal API header
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 decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
int width
picture width / height.
static av_always_inline int bytestream2_tell(GetByteContext *g)
Libavcodec external API header.
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
static int init_get_bits8(GetBitContext *s, const uint8_t *buffer, int byte_size)
Initialize GetBitContext.
main external API structure.
static ptrdiff_t lzss_uncompress(MidiVidContext *s, GetByteContext *gb, uint8_t *dst, unsigned int size)
const uint8_t * buffer_start
static unsigned int get_bits1(GetBitContext *s)
static void decode_flush(AVCodecContext *avctx)
static int decode_mvdv(MidiVidContext *s, AVCodecContext *avctx, AVFrame *frame)
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.
static int op(uint8_t **dst, const uint8_t *dst_end, GetByteContext *gb, int pixel, int count, int *x, int width, int linesize)
Perform decode operation.
common internal api header.
static av_cold int decode_init(AVCodecContext *avctx)
int key_frame
1 -> keyframe, 0-> not
unsigned int uncompressed_size
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() for allocating buffers and supports custom allocators.