29 #define AUDIO_FIFO_SIZE 65536 69 tag_len = pos - swf->
tag_pos - 2;
100 int xmin,
int xmax,
int ymin,
int ymax)
113 mask = (1 << nbits) - 1;
136 mask = (1 << nbits) - 1;
142 }
else if (dy == 0) {
156 int a,
int b,
int c,
int d,
int tx,
int ty)
272 if ((rate * 256LL) / rate_base >= (1<<16)) {
276 avio_wl16(pb, (rate * 256LL) / rate_base);
337 case 11025: v |= 1 << 2;
break;
338 case 22050: v |= 2 << 2;
break;
339 case 44100: v |= 3 << 2;
break;
342 av_log(s,
AV_LOG_ERROR,
"swf does not support that sample rate, choose from (44100, 22050, 11025).\n");
534 .mime_type =
"application/x-shockwave-flash",
546 #if CONFIG_AVM2_MUXER 550 .mime_type =
"application/x-shockwave-flash",
static void write_packet(OutputFile *of, AVPacket *pkt, OutputStream *ost, int unqueue)
const AVCodecTag ff_swf_codec_tags[]
void avio_wl16(AVIOContext *s, unsigned int val)
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
AVCodecParameters * audio_par
static void put_bits(Jpeg2000EncoderContext *s, int val, int n)
put n times val bit
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.
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
This struct describes the properties of an encoded stream.
int av_fifo_generic_write(AVFifoBuffer *f, void *src, int size, int(*func)(void *, void *, int))
Feed data from a user-supplied callback to an AVFifoBuffer.
#define av_assert0(cond)
assert() equivalent, that is always enabled.
void avio_wl32(AVIOContext *s, unsigned int val)
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
AVFifoBuffer * audio_fifo
AVStream ** streams
A list of all streams in the file.
static void put_swf_rect(AVIOContext *pb, int xmin, int xmax, int ymin, int ymax)
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
static void put_swf_line_edge(PutBitContext *pb, int dx, int dy)
static void swf_deinit(AVFormatContext *s)
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
static uint8_t * put_bits_ptr(PutBitContext *s)
Return the pointer to the byte where the bitstream writer will put the next bit.
static const uint16_t mask[17]
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
int av_fifo_generic_read(AVFifoBuffer *f, void *dest, int buf_size, void(*func)(void *, void *, int))
Feed data from an AVFifoBuffer to a user-supplied callback.
preferred ID for decoding MPEG audio layer 1, 2 or 3
enum AVMediaType codec_type
General type of the encoded data.
simple assert() macros that are a bit more flexible than ISO C assert().
int av_get_audio_frame_duration2(AVCodecParameters *par, int frame_bytes)
This function is the same as av_get_audio_frame_duration(), except it works with AVCodecParameters in...
AVCodecParameters * video_par
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
static int swf_write_audio(AVFormatContext *s, AVCodecParameters *par, uint8_t *buf, int size)
static void put_swf_tag(AVFormatContext *s, int tag)
static void max_nbits(int *nbits_ptr, int val)
static int write_trailer(AVFormatContext *s1)
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
static int swf_write_packet(AVFormatContext *s, AVPacket *pkt)
ff_const59 struct AVOutputFormat * oformat
The output container format.
static int swf_write_video(AVFormatContext *s, AVCodecParameters *par, const uint8_t *buf, int size)
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
#define AV_LOG_INFO
Standard information.
static int swf_write_header(AVFormatContext *s)
int av_fifo_size(const AVFifoBuffer *f)
Return the amount of data in bytes in the AVFifoBuffer, that is the amount of data you can read from ...
AVIOContext * pb
I/O context.
void avio_w8(AVIOContext *s, int b)
a very simple circular buffer FIFO implementation
#define flags(name, subs,...)
int sample_rate
Audio only.
static void put_swf_end_tag(AVFormatContext *s)
static void flush_put_bits(PutBitContext *s)
Pad the end of the output stream with zeros.
static void init_put_bits(PutBitContext *s, uint8_t *buffer, int buffer_size)
Initialize the PutBitContext s.
AVFifoBuffer * av_fifo_alloc(unsigned int size)
Initialize an AVFifoBuffer.
void * priv_data
Format private data.
static void write_header(FFV1Context *f)
void avio_wb32(AVIOContext *s, unsigned int val)
void av_fifo_freep(AVFifoBuffer **f)
Free an AVFifoBuffer and reset pointer to NULL.
AVCodecParameters * codecpar
Codec parameters associated with this stream.
static int swf_write_trailer(AVFormatContext *s)
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
static void put_swf_matrix(AVIOContext *pb, int a, int b, int c, int d, int tx, int ty)
static double val(void *priv, double ch)
This structure stores compressed data.