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30 #define BITSTREAM_READER_LE
44 #define CODE_VLC_BITS 14
54 int pitch,
const uint8_t *
table)
70 for (
i = 0;
i <
c * 2;
i++)
81 for (j = 1; j <
height; j++) {
92 for (
i = 0;
i <
c * 2;
i++) {
93 dst[
out] = dst[
out - pitch];
100 t = dst[
out - pitch] + (
table[
c * 2] - 128);
104 t = dst[
out - pitch] + (
table[(
c * 2) + 1] - 128);
116 int pitch,
const uint8_t *
table)
126 for (j = 0; j <
height; j++) {
138 t = dst[
out] + (((
table[
c * 2] - 128)*3) >> 2);
142 t = dst[
out] + (((
table[(
c * 2) + 1] - 128)*3) >> 2);
157 const uint8_t *buf = avpkt->
data;
158 int buf_size = avpkt->
size;
168 if (start >= buf_size) {
173 s->decode_delta = buf[18];
180 ltab = buf[0x22] & 3;
181 ctab = buf[0x22] >> 2;
188 if (
s->decode_delta) {
static int get_bits_left(GetBitContext *gb)
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 ir2_decode_plane_inter(Ir2Context *ctx, int width, int height, uint8_t *dst, int pitch, const uint8_t *table)
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 const uint8_t ir2_delta_table[4][256]
static const uint16_t table[]
static int ir2_decode_frame(AVCodecContext *avctx, AVFrame *picture, int *got_frame, AVPacket *avpkt)
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
static av_cold int ir2_decode_end(AVCodecContext *avctx)
AVCodec p
The public AVCodec.
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
static const uint8_t ir2_tab[IR2_CODES][2]
static int ff_thread_once(char *control, void(*routine)(void))
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
static int init_get_bits8(GetBitContext *s, const uint8_t *buffer, int byte_size)
Initialize GetBitContext.
#define FF_CODEC_DECODE_CB(func)
const FFCodec ff_indeo2_decoder
int(* init)(AVBSFContext *ctx)
static int ir2_get_code(GetBitContext *gb)
#define CODEC_LONG_NAME(str)
static av_always_inline int get_vlc2(GetBitContext *s, const VLCElem *table, int bits, int max_depth)
Parse a vlc code.
static av_cold void ir2_init_static(void)
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
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
static int ir2_decode_plane(Ir2Context *ctx, int width, int height, uint8_t *dst, int pitch, const uint8_t *table)
int av_frame_ref(AVFrame *dst, const AVFrame *src)
Set up a new reference to the data described by the source frame.
#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.
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.
main external API structure.
#define VLC_INIT_STATIC_FROM_LENGTHS(vlc, bits, nb_codes, lens, len_wrap, symbols, symbols_wrap, symbols_size, offset, flags, static_size)
static av_cold int ir2_decode_init(AVCodecContext *avctx)
#define VLC_INIT_OUTPUT_LE
This structure stores compressed data.
int width
picture width / height.
int linesize[AV_NUM_DATA_POINTERS]
For video, a positive or negative value, which is typically indicating the size in bytes of each pict...
@ AV_PIX_FMT_YUV410P
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
#define AVERROR_INVALIDDATA
Invalid data found when processing input.