34 #define BITSTREAM_READER_LE 39 #define EA_PREAMBLE_SIZE 8 40 #define kVGT_TAG MKTAG('k', 'V', 'G', 'T') 85 if (src_end - src < 3)
90 while (size > 0 && src < src_end) {
98 size1 = (((src[0] & 31) + 1) << 2);
102 offset = ((src[0] & 0x10) << 12) +
AV_RB16(&src[1]) + 1;
103 size2 = ((src[0] & 0xC) << 6) + src[3] + 5;
107 size1 = ((src[1] & 0xC0) >> 6);
108 offset = (
AV_RB16(&src[1]) & 0x3FFF) + 1;
109 size2 = (src[0] & 0x3F) + 4;
113 offset = ((src[0] & 0x60) << 3) + src[1] + 1;
114 size2 = ((src[0] & 0x1C) >> 2) + 3;
120 if (size1 > src_end - src)
125 run =
FFMIN(size1, dst_end - dst);
126 memcpy(dst, src, run);
132 if (dst - dst_start < offset)
135 run =
FFMIN(size2, dst_end - dst);
160 if(buf_end - buf < 12)
164 num_blocks_raw =
AV_RL16(&buf[2]);
165 num_blocks_packed =
AV_RL16(&buf[4]);
166 vector_bits =
AV_RL16(&buf[6]);
171 "Invalid value for motion vector bits: %d\n", vector_bits);
195 mvbits = (num_mvs * 2 * 10 + 31) & ~31;
201 for (i = 0; i <
num_mvs; i++) {
209 buf += num_blocks_raw * 16;
215 for (j = 0; j < 4; j++)
217 for (j = 0; j < 16; j++)
228 unsigned int vector =
get_bits(&gb, vector_bits);
230 ptrdiff_t src_stride;
232 if (vector < num_mvs) {
246 if (offset < num_blocks_raw)
247 src = blocks_raw + 16*
offset;
248 else if (offset - num_blocks_raw < num_blocks_packed)
255 for (j = 0; j < 4; j++)
256 for (i = 0; i < 4; i++)
257 frame->
data[0][(y * 4 + j) * frame->
linesize[0] + (x * 4 +
i)] =
258 src[j * src_stride + i];
265 void *
data,
int *got_frame,
269 int buf_size = avpkt->
size;
271 const uint8_t *buf_end = buf + buf_size;
283 if(buf_end - buf < 12) {
299 for(i = 0; i < pal_count && i <
AVPALETTE_COUNT && buf_end - buf >= 3; i++) {
303 if (buf_end - buf < 5) {
326 for (y = 0; y < s->
height; y++)
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
This structure describes decoded (raw) audio or video data.
ptrdiff_t const GLvoid * data
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
#define AV_LOG_WARNING
Something somehow does not look correct.
Memory handling functions.
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_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
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_WB24 unsigned int_TMPL AV_RB16
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
static int get_sbits(GetBitContext *s, int n)
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
8 bits with AV_PIX_FMT_RGB32 palette
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.
void av_memcpy_backptr(uint8_t *dst, int back, int cnt)
Overlapping memcpy() implementation.
bitstream reader API header.
static int get_bits_left(GetBitContext *gb)
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
static av_cold int tgv_decode_end(AVCodecContext *avctx)
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 num_mvs
current length of mv_codebook
const char * name
Name of the codec implementation.
int av_reallocp_array(void *ptr, size_t nmemb, size_t size)
Allocate, reallocate, or free an array through a pointer to a pointer.
uint32_t palette[AVPALETTE_COUNT]
enum AVPictureType pict_type
Picture type of the frame.
uint8_t(* block_codebook)[16]
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
int num_blocks_packed
current length of block_codebook
int av_reallocp(void *ptr, size_t size)
Allocate, reallocate, or free a block of memory through a pointer to a pointer.
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.
static int tgv_decode_inter(TgvContext *s, AVFrame *frame, const uint8_t *buf, const uint8_t *buf_end)
Decode inter-frame.
Rational number (pair of numerator and denominator).
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
static av_cold int tgv_decode_init(AVCodecContext *avctx)
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 unpack(const uint8_t *src, const uint8_t *src_end, uint8_t *dst, int width, int height)
Unpack buffer.
common internal api header.
int key_frame
1 -> keyframe, 0-> not
static int tgv_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
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.
#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() or get_encode_buffer() for allocating buffers and supports custom allocators...