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27 #define BITSTREAM_READER_LE
41 const unsigned char *src_end,
42 unsigned char *dst,
int dst_size)
50 for (
i = 0, sz = 0;
i < 64 && sz < dst_size;
i++) {
54 sz +=
FFABS(code_table[
i]);
59 for (
i = 0; i < 64 && dst_size > 0;
i++) {
63 if (src_end -
src < 1)
79 const unsigned char *
src,
80 const unsigned char *src_end,
86 unsigned char block[8 * 8];
88 if (src_end -
src < 1)
95 for (
b = 0;
b < 8;
b++) {
96 memcpy(dst, &
block[
b * 8], 8);
102 for (
i = 0;
i < 8;
i++) {
103 for (
b = 0;
b < 8;
b++)
118 for (
b = 0;
b < 8;
b++) {
119 for (
i = 0;
i < 8;
i++)
129 const unsigned char *
src,
130 const unsigned char *src_end,
135 if (src_end -
src < 8 * 8)
138 for (
i = 0;
i < 8;
i++) {
148 const unsigned char *
src,
149 const unsigned char *src_end,
155 if (src_end -
src < 2)
160 }
while (!(
pos & 0x80));
167 const unsigned char *data_end =
data + data_size;
177 palette = (uint32_t *)seq->
frame->
data[1];
178 if (data_end -
data < 256 * 3)
180 for (
i = 0;
i < 256;
i++) {
181 for (j = 0; j < 3; j++,
data++)
185 #if FF_API_PALETTE_HAS_CHANGED
193 if (data_end -
data < 128)
196 for (y = 0; y < 128; y += 8)
197 for (x = 0; x < 256; x += 8) {
240 const uint8_t *buf = avpkt->
data;
241 int buf_size = avpkt->
size;
269 .
p.
name =
"tiertexseqvideo",
#define FF_ENABLE_DEPRECATION_WARNINGS
static int get_bits_left(GetBitContext *gb)
attribute_deprecated int palette_has_changed
Tell user application that palette has changed from previous frame.
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
static int get_bits_count(const GetBitContext *s)
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
This structure describes decoded (raw) audio or video data.
static av_cold int seqvideo_decode_end(AVCodecContext *avctx)
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 int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
AVCodec p
The public AVCodec.
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
#define FF_CODEC_DECODE_CB(func)
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.
int(* init)(AVBSFContext *ctx)
static int get_sbits(GetBitContext *s, int n)
@ AV_CODEC_ID_TIERTEXSEQVIDEO
#define CODEC_LONG_NAME(str)
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
const uint8_t ff_log2_tab[256]
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
int av_frame_ref(AVFrame *dst, const AVFrame *src)
Set up a new reference to the data described by the source frame.
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
static av_cold int seqvideo_decode_init(AVCodecContext *avctx)
static const unsigned char * seq_unpack_rle_block(const unsigned char *src, const unsigned char *src_end, unsigned char *dst, int dst_size)
static const unsigned char * seq_decode_op1(SeqVideoContext *seq, const unsigned char *src, const unsigned char *src_end, unsigned char *dst)
#define i(width, name, range_min, range_max)
const char * name
Name of the codec implementation.
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
@ AV_PIX_FMT_PAL8
8 bits with AV_PIX_FMT_RGB32 palette
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 const unsigned char * seq_decode_op3(SeqVideoContext *seq, const unsigned char *src, const unsigned char *src_end, unsigned char *dst)
static const unsigned char * seq_decode_op2(SeqVideoContext *seq, const unsigned char *src, const unsigned char *src_end, unsigned char *dst)
static int seqvideo_decode(SeqVideoContext *seq, const unsigned char *data, int data_size)
main external API structure.
const FFCodec ff_tiertexseqvideo_decoder
static int seqvideo_decode_frame(AVCodecContext *avctx, AVFrame *rframe, int *got_frame, AVPacket *avpkt)
#define FF_DISABLE_DEPRECATION_WARNINGS
This structure stores compressed data.
#define flags(name, subs,...)
int linesize[AV_NUM_DATA_POINTERS]
For video, a positive or negative value, which is typically indicating the size in bytes of each pict...
The exact code depends on how similar the blocks are and how related they are to the block
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
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
static const ColorEntry color_table[]