Go to the documentation of this file.
44 #define ID_8SVX MKTAG('8','S','V','X')
45 #define ID_16SV MKTAG('1','6','S','V')
46 #define ID_MAUD MKTAG('M','A','U','D')
47 #define ID_MHDR MKTAG('M','H','D','R')
48 #define ID_MDAT MKTAG('M','D','A','T')
49 #define ID_VHDR MKTAG('V','H','D','R')
50 #define ID_ATAK MKTAG('A','T','A','K')
51 #define ID_RLSE MKTAG('R','L','S','E')
52 #define ID_CHAN MKTAG('C','H','A','N')
53 #define ID_PBM MKTAG('P','B','M',' ')
54 #define ID_ILBM MKTAG('I','L','B','M')
55 #define ID_BMHD MKTAG('B','M','H','D')
56 #define ID_DGBL MKTAG('D','G','B','L')
57 #define ID_CAMG MKTAG('C','A','M','G')
58 #define ID_CMAP MKTAG('C','M','A','P')
59 #define ID_ACBM MKTAG('A','C','B','M')
60 #define ID_DEEP MKTAG('D','E','E','P')
61 #define ID_RGB8 MKTAG('R','G','B','8')
62 #define ID_RGBN MKTAG('R','G','B','N')
63 #define ID_DSD MKTAG('D','S','D',' ')
64 #define ID_DST MKTAG('D','S','T',' ')
65 #define ID_DSTC MKTAG('D','S','T','C')
66 #define ID_DSTF MKTAG('D','S','T','F')
67 #define ID_FRTE MKTAG('F','R','T','E')
68 #define ID_ANIM MKTAG('A','N','I','M')
69 #define ID_ANHD MKTAG('A','N','H','D')
70 #define ID_DLTA MKTAG('D','L','T','A')
71 #define ID_DPAN MKTAG('D','P','A','N')
73 #define ID_FORM MKTAG('F','O','R','M')
74 #define ID_FRM8 MKTAG('F','R','M','8')
75 #define ID_ANNO MKTAG('A','N','N','O')
76 #define ID_AUTH MKTAG('A','U','T','H')
77 #define ID_CHRS MKTAG('C','H','R','S')
78 #define ID_COPYRIGHT MKTAG('(','c',')',' ')
79 #define ID_CSET MKTAG('C','S','E','T')
80 #define ID_FVER MKTAG('F','V','E','R')
81 #define ID_NAME MKTAG('N','A','M','E')
82 #define ID_TEXT MKTAG('T','E','X','T')
83 #define ID_ABIT MKTAG('A','B','I','T')
84 #define ID_BODY MKTAG('B','O','D','Y')
85 #define ID_DBOD MKTAG('D','B','O','D')
86 #define ID_DPEL MKTAG('D','P','E','L')
87 #define ID_DLOC MKTAG('D','L','O','C')
88 #define ID_TVDC MKTAG('T','V','D','C')
102 #define IFF_EXTRA_VIDEO_SIZE 41
130 const char *
const tag,
131 const unsigned data_size)
133 uint8_t *buf = ((data_size + 1) == 0) ?
NULL :
av_malloc(data_size + 1);
138 if (
avio_read(
s->pb, buf, data_size) != data_size) {
149 const uint8_t *d = p->
buf;
174 #define DSD_SLFT MKTAG('S','L','F','T')
175 #define DSD_SRGT MKTAG('S','R','G','T')
176 #define DSD_MLFT MKTAG('M','L','F','T')
177 #define DSD_MRGT MKTAG('M','R','G','T')
178 #define DSD_C MKTAG('C',' ',' ',' ')
179 #define DSD_LS MKTAG('L','S',' ',' ')
180 #define DSD_RS MKTAG('R','S',' ',' ')
181 #define DSD_LFE MKTAG('L','F','E',' ')
205 "dsd_source_comment",
206 "analogue_source_comment",
207 "pcm_source_comment",
226 const char * metadata_tag =
NULL;
228 if (
size >= INT64_MAX)
232 case MKTAG(
'D',
'I',
'A',
'R'): metadata_tag =
"artist";
break;
233 case MKTAG(
'D',
'I',
'T',
'I'): metadata_tag =
"title";
break;
236 if (metadata_tag &&
size > 4) {
264 if (
size >= INT64_MAX)
268 case MKTAG(
'A',
'B',
'S',
'S'):
278 case MKTAG(
'C',
'H',
'N',
'L'):
283 if (size < 2 + st->codecpar->ch_layout.nb_channels * 4)
301 case MKTAG(
'C',
'M',
'P',
'R'):
313 case MKTAG(
'F',
'S',
' ',
' '):
319 case MKTAG(
'I',
'D',
'3',
' '):
321 if (id3v2_extra_meta) {
336 case MKTAG(
'L',
'S',
'C',
'O'):
360 uint64_t chunk_pos, data_pos, data_size;
372 if (data_size < 1 || data_size >= INT64_MAX)
389 pkt->
duration =
s->streams[0]->codecpar->sample_rate / 75;
402 s->streams[0]->duration =
avio_rb32(pb) * (uint64_t)
s->streams[0]->codecpar->sample_rate / 75;
413 static const uint8_t
deep_rgb24[] = {0, 0, 0, 3, 0, 1, 0, 8, 0, 2, 0, 8, 0, 3, 0, 8};
414 static const uint8_t
deep_rgba[] = {0, 0, 0, 4, 0, 1, 0, 8, 0, 2, 0, 8, 0, 3, 0, 8};
415 static const uint8_t
deep_bgra[] = {0, 0, 0, 4, 0, 3, 0, 8, 0, 2, 0, 8, 0, 1, 0, 8};
416 static const uint8_t
deep_argb[] = {0, 0, 0, 4, 0,17, 0, 8, 0, 1, 0, 8, 0, 2, 0, 8};
417 static const uint8_t
deep_abgr[] = {0, 0, 0, 4, 0,17, 0, 8, 0, 3, 0, 8, 0, 2, 0, 8};
427 uint32_t screenmode = 0, num, den;
428 unsigned transparency = 0;
429 unsigned masking = 0;
453 const char *metadata_tag =
NULL;
459 if (data_size >= INT64_MAX)
470 if (data_size >= 16) {
535 if (data_size < 3 || data_size > 768 || data_size % 3) {
563 if (data_size >= 14) {
567 if (data_size >= 16) {
582 if (data_size < 4 || (data_size & 3))
584 if ((fmt_size =
avio_read(pb, fmt,
sizeof(fmt))) < 0)
622 if (data_size <
sizeof(iff->
tvdc))
630 case ID_TEXT: metadata_tag =
"comment";
break;
631 case ID_AUTH: metadata_tag =
"artist";
break;
633 case ID_NAME: metadata_tag =
"title";
break;
637 case MKTAG(
'F',
'V',
'E',
'R'):
645 case MKTAG(
'D',
'I',
'I',
'N'):
651 case MKTAG(
'P',
'R',
'O',
'P'):
663 case MKTAG(
'C',
'O',
'M',
'T'):
667 for (
i = 0;
i < nb_comments;
i++) {
678 snprintf(
tmp,
sizeof(
tmp),
"%04d-%02d-%02d %02d:%02d", year, mon, day, hour,
min);
686 tag =
"channel_comment";
708 if (metadata_size & 1)
780 if ((screenmode & 0x800 ) && iff->
bpp <= 8) {
781 iff->
ham = iff->
bpp > 6 ? 6 : 4;
784 iff->
flags = (screenmode & 0x80 ) && iff->
bpp <= 8;
797 bytestream_put_byte(&buf, iff->
bpp);
798 bytestream_put_byte(&buf, iff->
ham);
799 bytestream_put_byte(&buf, iff->
flags);
801 bytestream_put_byte(&buf, iff->
masking);
819 unsigned chunk = bytestream2_get_le32(&gb);
820 unsigned size = bytestream2_get_be32(&gb);
826 return bytestream2_get_be32(&gb);
860 uint64_t data_size, orig_pos;
861 uint32_t chunk_id, chunk_id2;
876 }
else if (chunk_id ==
ID_FORM &&
svx8_compression_type svx8_compression
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
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
enum AVMediaType codec_type
General type of the encoded data.
#define AV_CHANNEL_LAYOUT_STEREO
AVStream * avformat_new_stream(AVFormatContext *s, const struct AVCodec *c)
Add a new stream to a media file.
#define AVERROR_EOF
End of file.
@ AV_CODEC_ID_PCM_S16BE_PLANAR
void ff_id3v2_read(AVFormatContext *s, const char *magic, ID3v2ExtraMeta **extra_meta, unsigned int max_search_size)
Read an ID3v2 tag, including supported extra metadata.
unsigned masking
masking method used
@ AV_PIX_FMT_BGRA
packed BGRA 8:8:8:8, 32bpp, BGRABGRA...
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
enum AVChannelOrder order
Channel order used in this layout.
int nb_channels
Number of channels in this layout.
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
static av_always_inline void bytestream2_skip(GetByteContext *g, unsigned int size)
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
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 type
int64_t duration
Decoding: duration of the stream, in stream time base.
int ff_id3v2_parse_chapters(AVFormatContext *s, ID3v2ExtraMeta *cur)
Create chapters for all CHAP tags found in the ID3v2 header.
#define AV_DICT_DONT_STRDUP_VAL
Take ownership of a value that's been allocated with av_malloc() or another memory allocation functio...
int av_get_bits_per_sample(enum AVCodecID codec_id)
Return codec bits per sample.
unsigned int avio_rb32(AVIOContext *s)
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
#define FF_ARRAY_ELEMS(a)
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
@ AV_CHANNEL_ORDER_UNSPEC
Only the channel count is specified, without any further information about the channel order.
uint8_t tvdc[32]
TVDC lookup table.
#define av_assert0(cond)
assert() equivalent, that is always enabled.
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
@ AV_PIX_FMT_RGBA
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
AVCodecParameters * codecpar
Codec parameters associated with this stream.
static int read_header(FFV1Context *f)
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
int ff_id3v2_parse_apic(AVFormatContext *s, ID3v2ExtraMeta *extra_meta)
Create a stream for each APIC (attached picture) extracted from the ID3v2 header.
uint64_t avio_rb64(AVIOContext *s)
This structure contains the data a format has to probe a file.
AVChannelLayout ch_layout
Audio only.
@ AV_PIX_FMT_ABGR
packed ABGR 8:8:8:8, 32bpp, ABGRABGR...
int sample_rate
Audio only.
static av_always_inline int bytestream2_get_bytes_left(GetByteContext *g)
int extradata_size
Size of the extradata content in bytes.
unsigned int avio_rl32(AVIOContext *s)
@ AV_PIX_FMT_RGB24
packed RGB 8:8:8, 24bpp, RGBRGB...
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
unsigned flags
1 for EHB, 0 is no extra half darkening
An AVChannelLayout holds information about the channel layout of audio data.
#define ID3v2_DEFAULT_MAGIC
Default magic bytes for ID3v2 header: "ID3".
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
int avio_r8(AVIOContext *s)
int flags
A combination of AV_PKT_FLAG values.
@ AV_PIX_FMT_ARGB
packed ARGB 8:8:8:8, 32bpp, ARGBARGB...
static av_always_inline void bytestream_put_buffer(uint8_t **b, const uint8_t *src, unsigned int size)
#define i(width, name, range_min, range_max)
int block_align
Audio only.
unsigned bitmap_compression
delta compression method used
const uint32_t * dsd_layout
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
unsigned int avio_rb16(AVIOContext *s)
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
unsigned bpp
bits per plane to decode (differs from bits_per_coded_sample if HAM)
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
static int ref[MAX_W *MAX_W]
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
static int read_probe(const AVProbeData *p)
int bits_per_coded_sample
The number of bits per sample in the codedwords.
#define avpriv_request_sample(...)
unsigned ham
0 if non-HAM or number of hold bits (6 for bpp > 6, 4 otherwise)
#define AV_CHANNEL_LAYOUT_MONO
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
This structure stores compressed data.
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta)
Free memory allocated parsing special (non-text) metadata.
int64_t pos
byte position in stream, -1 if unknown
@ AV_CODEC_ID_PCM_S8_PLANAR
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
#define MKTAG(a, b, c, d)
unsigned transparency
transparency color index in palette
#define AV_CHANNEL_LAYOUT_5POINT0
#define AV_CHANNEL_LAYOUT_5POINT1
int is_64bit
chunk size is 64-bit
unsigned maud_compression
#define av_fourcc2str(fourcc)
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.