73 #if CONFIG_BINTEXT_DEMUXER | CONFIG_ADF_DEMUXER | CONFIG_IDF_DEMUXER 83 #if CONFIG_BINTEXT_DEMUXER 84 static const uint8_t next_magic[]={
85 0x1A, 0x1B,
'[',
'0',
';',
'3',
'0',
';',
'4',
'0',
'm',
'N',
'E',
'X',
'T', 0x00
96 if (
avio_read(pb, buf,
sizeof(next_magic)) !=
sizeof(next_magic))
98 if (memcmp(buf, next_magic,
sizeof(next_magic)))
105 #define GET_EFI2_META(name,size) \ 107 if (len < 1 || len > size) \ 109 if (avio_read(pb, buf, size) == size && *buf) { \ 111 av_dict_set(&avctx->metadata, name, buf, 0); \ 114 GET_EFI2_META(
"filename", 12)
115 GET_EFI2_META(
"author", 20)
116 GET_EFI2_META(
"publisher", 20)
117 GET_EFI2_META(
"title", 35)
126 par->
width =
fsize > 4000 ? (160<<3) : (80<<3);
132 int magic = 0, sauce = 0;
137 magic = !memcmp(d + p->
buf_size - 256, next_magic,
sizeof(next_magic));
139 sauce = !memcmp(d + p->
buf_size - 128,
"SAUCE00", 7);
151 predict_width(&par, p->
buf_size, got_width);
154 calculate_height(&par, p->
buf_size);
158 for (i = 0; i < p->
buf_size - 256; i+=2) {
159 if ((d[i+1] & 15) == (d[i+1] >> 4) && d[i] && d[i] != 0xFF && d[i] !=
' ') {
195 next_tag_read(s, &bin->
fsize);
208 #if CONFIG_XBIN_DEMUXER 213 if (
AV_RL32(d) ==
MKTAG(
'X',
'B',
'I',
'N') && d[4] == 0x1A &&
215 d[9] > 0 && d[9] <= 32)
224 char fontheight,
flags;
262 #if CONFIG_ADF_DEMUXER 306 #if CONFIG_IDF_DEMUXER 307 static const uint8_t idf_magic[] = {
308 0x04, 0x31, 0x2e, 0x34, 0x00, 0x00, 0x00, 0x00, 0x4f, 0x00, 0x15, 0x00
313 if (p->
buf_size <
sizeof(idf_magic))
315 if (!memcmp(p->
buf, idf_magic,
sizeof(idf_magic)))
325 int got_width = 0,
ret;
363 if (bin->
fsize > 0) {
367 }
else if (!bin->
fsize) {
380 #define OFFSET(x) offsetof(BinDemuxContext, x) 388 #define CLASS(name) \ 389 (const AVClass[1]){{ \ 390 .class_name = name, \ 391 .item_name = av_default_item_name, \ 393 .version = LIBAVUTIL_VERSION_INT, \ 396 #if CONFIG_BINTEXT_DEMUXER 404 .priv_class =
CLASS(
"Binary text demuxer"),
408 #if CONFIG_XBIN_DEMUXER 416 .priv_class =
CLASS(
"eXtended BINary text (XBIN) demuxer"),
420 #if CONFIG_ADF_DEMUXER 428 .priv_class =
CLASS(
"Artworx Data Format demuxer"),
432 #if CONFIG_IDF_DEMUXER 441 .priv_class =
CLASS(
"iCE Draw File demuxer"),
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
int64_t avio_size(AVIOContext *s)
Get the filesize.
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
This struct describes the properties of an encoded stream.
int chars_per_frame
characters to send decoder per frame; set by private options as characters per second, and then converted to characters per frame at runtime
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
static double av_q2d(AVRational a)
Convert an AVRational to a double.
static const AVOption options[]
int av_match_ext(const char *filename, const char *extensions)
Return a positive value if the given filename has one of the given extensions, 0 otherwise.
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
int ff_sauce_read(AVFormatContext *avctx, uint64_t *fsize, int *got_width, int get_height)
enum AVMediaType codec_type
General type of the encoded data.
int flags
A combination of AV_PKT_FLAG values.
int extradata_size
Size of the extradata content in bytes.
int avio_r8(AVIOContext *s)
int buf_size
Size of buf except extra allocated bytes.
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
uint64_t fsize
file size less metadata buffer
static int read_header(FFV1Context *f)
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
AVRational framerate
frames per second (private option)
AVIOContext * pb
I/O context.
Describe the class of an AVClass context structure.
Rational number (pair of numerator and denominator).
#define AV_OPT_FLAG_DECODING_PARAM
a generic parameter which can be set by the user for demuxing or decoding
offset must point to AVRational
static int read_packet(AVFormatContext *s, AVPacket *pkt)
offset must point to two consecutive integers
This structure contains the data a format has to probe a file.
static AVStream * init_stream(AVFormatContext *s)
#define flags(name, subs,...)
unsigned int avio_rl16(AVIOContext *s)
void * priv_data
Format private data.
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
AVCodecParameters * codecpar
Codec parameters associated with this stream.
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
static int64_t fsize(FILE *f)
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
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
#define MKTAG(a, b, c, d)
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
This structure stores compressed data.