30 #define BITSTREAM_READER_LE 44 #define CODE_VLC_BITS 14 68 if (out + c*2 > width)
70 for (i = 0; i < c * 2; i++)
75 dst[out++] = table[c * 2];
76 dst[out++] = table[(c * 2) + 1];
81 for (j = 1; j <
height; j++) {
90 if (out + c*2 > width)
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);
126 for (j = 0; j <
height; j++) {
128 while (out < width) {
138 t = dst[
out] + (((table[c * 2] - 128)*3) >> 2);
142 t = dst[
out] + (((table[(c * 2) + 1] - 128)*3) >> 2);
154 void *
data,
int *got_frame,
159 int buf_size = avpkt->
size;
170 if (start >= buf_size) {
182 ltab = buf[0x22] & 3;
183 ctab = buf[0x22] >> 2;
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
static int ir2_get_code(GetBitContext *gb)
This structure describes decoded (raw) audio or video data.
ptrdiff_t const GLvoid * data
static av_cold int init(AVCodecContext *avctx)
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Macro definitions for various function/variable attributes.
static int ir2_decode_plane_inter(Ir2Context *ctx, int width, int height, uint8_t *dst, int pitch, const uint8_t *table)
AVCodec ff_indeo2_decoder
static int ir2_decode_plane(Ir2Context *ctx, int width, int height, uint8_t *dst, int pitch, const uint8_t *table)
#define FF_CODEC_CAP_INIT_THREADSAFE
The codec does not modify any global variables in the init function, allowing to call the init functi...
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
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
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_cold int ir2_decode_init(AVCodecContext *avctx)
static av_cold void ir2_init_static(void)
static const uint16_t table[]
static int get_bits_left(GetBitContext *gb)
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
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.
static av_cold int ir2_decode_end(AVCodecContext *avctx)
int width
picture width / height.
static const uint8_t ir2_tab[IR2_CODES][2]
#define INIT_VLC_STATIC_FROM_LENGTHS(vlc, bits, nb_codes, lens, len_wrap,symbols, symbols_wrap, symbols_size,offset, flags, static_size)
static av_always_inline int get_vlc2(GetBitContext *s, VLC_TYPE(*table)[2], int bits, int max_depth)
Parse a vlc code.
Libavcodec external API header.
static int ir2_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
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.
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
common internal api header.
static int ff_thread_once(char *control, void(*routine)(void))
VLC_TYPE(* table)[2]
code, bits
static const uint8_t ir2_delta_table[4][256]
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() or get_encode_buffer() for allocating buffers and supports custom allocators...
#define INIT_VLC_OUTPUT_LE