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)
136 dsty[x] = vec[idx * 12 + 6];
137 dsty[x+1] = vec[idx * 12 + 9];
141 dstu[x] = vec[idx * 12 + 7];
142 dstu[x+1] = vec[idx * 12 +10];
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);
167 int length = (
s0 & 0xF) + 3;
169 if (dst + length > dst_end ||
173 for (
int j = 0; j < length; j++) {
181 *dst++ = bytestream2_get_byte(gb);
187 return dst - dst_start;
196 int ret,
key, uncompressed;
198 if (avpkt->
size <= 13)
203 uncompressed = bytestream2_get_le32(gb);
212 if (!
s->uncompressed)
static void flush(AVCodecContext *avctx)
Libavcodec external API header.
static av_cold int init(AVCodecContext *avctx)
static av_always_inline int bytestream2_get_bytes_left(GetByteContext *g)
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
static av_always_inline void bytestream2_skip(GetByteContext *g, unsigned int size)
static av_always_inline int bytestream2_tell(GetByteContext *g)
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.
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
bitstream reader API header.
static void skip_bits_long(GetBitContext *s, int n)
Skips the specified number of bits.
static unsigned int get_bits1(GetBitContext *s)
static int init_get_bits8(GetBitContext *s, const uint8_t *buffer, int byte_size)
Initialize GetBitContext.
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
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...
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
int av_frame_ref(AVFrame *dst, const AVFrame *src)
Set up a new reference to the data described by the source frame.
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
void * av_calloc(size_t nmemb, size_t size)
Non-inlined equivalent of av_mallocz_array().
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...
@ AV_PICTURE_TYPE_I
Intra.
@ AV_PICTURE_TYPE_P
Predicted.
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.
#define FF_CODEC_CAP_INIT_CLEANUP
The codec allows calling the close function for deallocation even if the init function returned a fai...
common internal API header
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
static const uint16_t mask[17]
Memory handling functions.
static ptrdiff_t lzss_uncompress(MidiVidContext *s, GetByteContext *gb, uint8_t *dst, unsigned int size)
static av_cold int decode_close(AVCodecContext *avctx)
static av_cold int decode_init(AVCodecContext *avctx)
static void decode_flush(AVCodecContext *avctx)
static int decode_mvdv(MidiVidContext *s, AVCodecContext *avctx, AVFrame *frame)
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
@ AV_PIX_FMT_YUV444P
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
main external API structure.
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
int width
picture width / height.
const char * name
Name of the codec implementation.
This structure describes decoded (raw) audio or video data.
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
int key_frame
1 -> keyframe, 0-> not
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
enum AVPictureType pict_type
Picture type of the frame.
This structure stores compressed data.
const uint8_t * buffer_start
unsigned int uncompressed_size
static const uint8_t offset[127][2]