42 #define ZBUF_SIZE 4096 80 int len, xmin, xmax, ymin, ymax;
104 if (xmin || ymin || !xmax || !ymax)
107 if (p->
buf[3] >= 20 || xmax < 16 || ymax < 16)
114 static int zlib_refill(
void *opaque,
uint8_t *buf,
int buf_size)
118 z_stream *z = &swf->zstream;
126 z->next_in = swf->zbuf_in;
131 z->avail_out = buf_size;
134 if (ret == Z_STREAM_END)
139 if (buf_size - z->avail_out == 0)
142 return buf_size - z->avail_out;
157 if (tag ==
MKBETAG(
'C',
'W',
'S', 0)) {
160 if (inflateInit(&swf->zstream) != Z_OK) {
164 if (!(swf->zbuf_in =
av_malloc(ZBUF_SIZE)) ||
165 !(swf->zbuf_out =
av_malloc(ZBUF_SIZE)) ||
171 swf->zpb->seekable = 0;
177 }
else if (tag !=
MKBETAG(
'F',
'W',
'S', 0))
181 len = (4 * nbits - 3 + 7) / 8;
193 int sample_rate_code, sample_size_code;
208 sample_rate_code = info>>2 & 3;
209 sample_size_code = info>>1 & 1;
295 if (((v>>4) & 15) == 2) {
296 ast->internal->skip_samples =
avio_rl16(pb);
328 pkt->
flags |= pkt_flags;
338 const int colormapbpp = 3 + alpha_bmp;
339 int linesize, colormapsize = 0;
342 const int bmp_fmt =
avio_r8(pb);
352 colormapsize =
avio_r8(pb) + 1;
356 linesize = width * 2;
359 linesize = width * 4;
363 goto bitmap_end_skip;
366 linesize =
FFALIGN(linesize, 4);
369 linesize >= INT_MAX / height ||
370 linesize * height >= INT_MAX - colormapsize * colormapbpp) {
372 goto bitmap_end_skip;
375 out_len = colormapsize * colormapbpp + linesize *
height;
377 ff_dlog(s,
"bitmap: ch=%d fmt=%d %dx%d (linesize=%d) len=%d->%ld pal=%d\n",
378 ch_id, bmp_fmt, width, height, linesize, len, out_len, colormapsize);
388 goto bitmap_end_skip;
395 if ((res = uncompress(buf, &out_len, zbuf, len)) != Z_OK) {
397 goto bitmap_end_skip;
418 if ((res =
av_new_packet(pkt, out_len - colormapsize * colormapbpp)) < 0)
420 if (!st->codecpar->width && !st->codecpar->height) {
422 st->codecpar->height =
height;
429 if (linesize * height > pkt->
size) {
437 for (i = 0; i < colormapsize; i++)
438 if (alpha_bmp) colormap[
i] = buf[3]<<24 |
AV_RB24(buf + 4*i);
439 else colormap[
i] = 0xff
U <<24 |
AV_RB24(buf + 3*i);
456 if (st->codecpar->format !=
AV_PIX_FMT_NONE && st->codecpar->format != pix_fmt) {
459 st->codecpar->format =
pix_fmt;
461 memcpy(pkt->
data, buf + colormapsize*colormapbpp, linesize * height);
534 if (res != pkt->
size) {
559 inflateEnd(&s->zstream);
const AVCodecTag ff_swf_codec_tags[]
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
static enum AVPixelFormat pix_fmt
static int get_swf_tag(AVIOContext *pb, int *len_ptr)
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
#define AV_LOG_WARNING
Something somehow does not look correct.
int64_t pos
byte position in stream, -1 if unknown
void av_shrink_packet(AVPacket *pkt, int size)
Reduce packet size, correctly zeroing padding.
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
#define AV_CH_LAYOUT_STEREO
int ctx_flags
Flags signalling stream properties.
#define av_assert0(cond)
assert() equivalent, that is always enabled.
8 bits with AV_PIX_FMT_RGB32 palette
unsigned int avio_rb32(AVIOContext *s)
enum AVStreamParseType need_parsing
int id
Format-specific stream ID.
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
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_RB32
AVStream ** streams
A list of all streams in the file.
#define AVERROR_EOF
End of file.
bitstream reader API header.
static av_cold int read_close(AVFormatContext *ctx)
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
uint64_t channel_layout
Audio only.
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.
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
AVIOContext * avio_alloc_context(unsigned char *buffer, int buffer_size, int write_flag, void *opaque, int(*read_packet)(void *opaque, uint8_t *buf, int buf_size), int(*write_packet)(void *opaque, uint8_t *buf, int buf_size), int64_t(*seek)(void *opaque, int64_t offset, int whence))
Allocate and initialize an AVIOContext for buffered I/O.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
AVInputFormat ff_swf_demuxer
An AV_PKT_DATA_PALETTE side data packet contains exactly AVPALETTE_SIZE bytes worth of palette...
unsigned int avio_rl32(AVIOContext *s)
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
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().
packed ARGB 8:8:8:8, 32bpp, ARGBARGB...
int flags
A combination of AV_PKT_FLAG values.
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.
common internal API header
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
int av_image_check_size(unsigned int w, unsigned int h, int log_offset, void *log_ctx)
Check if the given dimension of an image is valid, meaning that all bytes of the image can be address...
audio channel layout utility functions
static const AVCodecTag swf_audio_codec_tags[]
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
static int swf_probe(const AVProbeData *p)
static AVStream * create_new_audio_stream(AVFormatContext *s, int id, int info)
static int swf_read_header(AVFormatContext *s)
static int read_header(FFV1Context *f)
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
#define AV_LOG_INFO
Standard information.
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
AVIOContext * pb
I/O context.
static int init_get_bits8(GetBitContext *s, const uint8_t *buffer, int byte_size)
Initialize GetBitContext.
static void inflate(uint8_t *dst, const uint8_t *p1, int width, int threshold, const uint8_t *coordinates[], int coord, int maxc)
This structure contains the data a format has to probe a file.
static unsigned int get_bits_long(GetBitContext *s, int n)
Read 0-32 bits.
#define flags(name, subs,...)
int sample_rate
Audio only.
static int swf_read_packet(AVFormatContext *s, AVPacket *pkt)
unsigned int avio_rl16(AVIOContext *s)
void avio_context_free(AVIOContext **s)
Free the supplied IO context and everything associated with it.
#define AV_PIX_FMT_RGB555
#define MKBETAG(a, b, c, d)
void * priv_data
Format private data.
AVCodecParameters * codecpar
Codec parameters associated with this stream.
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
uint8_t * av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type, int size)
Allocate new information of a packet.
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 AV_CH_LAYOUT_MONO
packed RGB 8:8:8, 32bpp, XRGBXRGB... X=unused/undefined
This structure stores compressed data.
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...