76 for (i = 0; i < 16; i++) {
81 for (i = 0; i < 16; i++)
108 #define DEFAULT_BG_COLOR 0 141 void *
data,
int *got_frame,
146 int buf_size = avpkt->
size;
147 const uint8_t *buf_end = buf+buf_size;
162 while (buf + 2 < buf_end) {
164 int type = *buf >> 6;
165 int count = (*buf & 0x3F) + 1;
169 for (i = 0; i < count && buf + 1 < buf_end; i++) {
176 for (i = 0; i < count && buf < buf_end; i++)
181 for (i = 0; i < count && buf < buf_end; i++)
187 for (i = 0; i < count && buf < buf_end; i++)
193 while (buf + 2 < buf_end) {
196 if (buf + 6 > buf_end)
198 for (i = 0; i < buf[2]; i++)
207 while (buf + 1 < buf_end) {
217 #if CONFIG_BINTEXT_DECODER 229 #if CONFIG_XBIN_DECODER 241 #if CONFIG_IDF_DECODER
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
This structure describes decoded (raw) audio or video data.
ptrdiff_t const GLvoid * data
#define AV_LOG_WARNING
Something somehow does not look correct.
static av_cold int init(AVCodecContext *avctx)
AVCodec ff_bintext_decoder
The reader does not expect b to be semantically here and if the code is changed by maybe adding a a division or other the signedness will almost certainly be mistaken To avoid this confusion a new type was SUINT is the C unsigned type but it holds a signed int to use the same example SUINT a
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
const uint8_t avpriv_vga16_font[4096]
static av_unused void hscroll(AVCodecContext *avctx)
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
static av_cold int decode_init(AVCodecContext *avctx)
8 bits with AV_PIX_FMT_RGB32 palette
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
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
const uint8_t avpriv_cga_font[2048]
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
const char * name
Name of the codec implementation.
enum AVPictureType pict_type
Picture type of the frame.
int width
picture width / height.
static void draw_char(AVCodecContext *avctx, int c, int a)
Draw character to screen.
void ff_draw_pc_font(uint8_t *dst, int linesize, const uint8_t *font, int font_height, int ch, int fg, int bg)
Draw CGA/EGA/VGA font to 8-bit pixel buffer.
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.
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
main external API structure.
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
int palette_has_changed
Tell user application that palette has changed from previous frame.
const uint32_t ff_cga_palette[16]
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
common internal api header.
This structure stores compressed data.
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
CGA/EGA/VGA ROM font data.