Go to the documentation of this file.
44 #define ZBUF_SIZE 4096
82 int len, xmin, xmax, ymin, ymax;
106 if (xmin || ymin || !xmax || !ymax)
109 if (p->
buf[3] >= 20 || xmax < 16 || ymax < 16)
116 static int zlib_refill(
void *opaque, uint8_t *buf,
int buf_size)
120 z_stream *z = &swf->zstream;
125 int n =
avio_read(
s->pb, swf->zbuf_in, ZBUF_SIZE);
128 z->next_in = swf->zbuf_in;
133 z->avail_out = buf_size;
136 if (
ret == Z_STREAM_END)
141 if (buf_size - z->avail_out == 0)
144 return buf_size - z->avail_out;
162 if (inflateInit(&swf->zstream) != Z_OK) {
166 if (!(swf->zbuf_in =
av_malloc(ZBUF_SIZE)) ||
167 !(swf->zbuf_out =
av_malloc(ZBUF_SIZE)) ||
173 swf->zpb->seekable = 0;
183 len = (4 * nbits - 3 + 7) / 8;
195 int sample_rate_code, sample_size_code;
204 sample_rate_code =
info>>2 & 3;
205 sample_size_code =
info>>1 & 1;
238 for (
i=0;
i<
s->nb_streams;
i++) {
260 for (
i=0;
i<
s->nb_streams;
i++) {
277 for (
i=0;
i<
s->nb_streams;
i++) {
291 if (((v>>4) & 15) == 2) {
304 for(
i=0;
i<
s->nb_streams;
i++) {
331 uint8_t *buf =
NULL, *zbuf =
NULL, *pal;
334 const int colormapbpp = 3 + alpha_bmp;
335 int linesize, colormapsize = 0;
338 const int bmp_fmt =
avio_r8(pb);
348 colormapsize =
avio_r8(pb) + 1;
352 linesize =
width * 2;
355 linesize =
width * 4;
359 goto bitmap_end_skip;
362 linesize =
FFALIGN(linesize, 4);
365 linesize >= INT_MAX /
height ||
366 linesize *
height >= INT_MAX - colormapsize * colormapbpp) {
368 goto bitmap_end_skip;
371 out_len = colormapsize * colormapbpp + linesize *
height;
373 ff_dlog(
s,
"bitmap: ch=%d fmt=%d %dx%d (linesize=%d) len=%d->%ld pal=%d\n",
374 ch_id, bmp_fmt,
width,
height, linesize,
len, out_len, colormapsize);
376 if (
len * 17373LL < out_len)
377 goto bitmap_end_skip;
387 goto bitmap_end_skip;
394 if ((res = uncompress(buf, &out_len, zbuf,
len)) != Z_OK) {
396 goto bitmap_end_skip;
399 for (
i = 0;
i <
s->nb_streams;
i++) {
404 if (
i ==
s->nb_streams) {
419 if (!st->codecpar->width && !st->codecpar->height) {
421 st->codecpar->height =
height;
436 for (
i = 0;
i < colormapsize;
i++)
437 if (alpha_bmp) colormap[
i] = buf[3]<<24 |
AV_RB24(buf + 4*
i);
438 else colormap[
i] = 0xff
U <<24 |
AV_RB24(buf + 3*
i);
458 st->codecpar->format =
pix_fmt;
460 memcpy(
pkt->
data, buf + colormapsize*colormapbpp, linesize *
height);
475 for (
i = 0;
i <
s->nb_streams;
i++) {
497 for (
i=0;
i<
s->nb_streams;
i++) {
502 if (
i ==
s->nb_streams) {
558 inflateEnd(&
s->zstream);
#define AV_LOG_WARNING
Something somehow does not look correct.
int skip_samples
Number of samples to skip at the start of the frame decoded from the next packet.
static int swf_read_header(AVFormatContext *s)
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.
AVStream * avformat_new_stream(AVFormatContext *s, const struct AVCodec *c)
Add a new stream to a media file.
#define AVERROR_EOF
End of file.
void avio_context_free(AVIOContext **s)
Free the supplied IO context and everything associated with it.
static unsigned int get_bits_long(GetBitContext *s, int n)
Read 0-32 bits.
@ TAG_DEFINEBITSLOSSLESS2
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, const 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.
static const AVCodecTag swf_audio_codec_tags[]
int buf_size
Size of buf except extra allocated bytes.
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
@ AV_PKT_DATA_PALETTE
An AV_PKT_DATA_PALETTE side data packet contains exactly AVPALETTE_SIZE bytes worth of palette.
void av_shrink_packet(AVPacket *pkt, int size)
Reduce packet size, correctly zeroing padding.
static void inflate(uint8_t *dst, const uint8_t *p1, int width, int threshold, const uint8_t *coordinates[], int coord, int maxc)
static av_cold int read_close(AVFormatContext *ctx)
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
@ AV_CODEC_ID_MP3
preferred ID for decoding MPEG audio layer 1, 2 or 3
unsigned int avio_rl16(AVIOContext *s)
unsigned int avio_rb32(AVIOContext *s)
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
static int init_get_bits8(GetBitContext *s, const uint8_t *buffer, int byte_size)
Initialize GetBitContext.
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
static int swf_read_packet(AVFormatContext *s, AVPacket *pkt)
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
const AVCodecTag ff_swf_codec_tags[]
static enum AVPixelFormat pix_fmt
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
#define av_assert0(cond)
assert() equivalent, that is always enabled.
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
#define FLV_VIDEO_FRAMETYPE_MASK
enum AVStreamParseType need_parsing
AVCodecParameters * codecpar
Codec parameters associated with this stream.
static int read_header(FFV1Context *f)
This structure contains the data a format has to probe a file.
AVChannelLayout ch_layout
Audio only.
int sample_rate
Audio only.
unsigned int avio_rl32(AVIOContext *s)
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
@ FLV_FRAME_KEY
key frame (for AVC, a seekable frame)
int ff_add_param_change(AVPacket *pkt, int32_t channels, uint64_t channel_layout, int32_t sample_rate, int32_t width, int32_t height)
Add side data to a packet for changing parameters to the given values.
static int get_swf_tag(AVIOContext *pb, int *len_ptr)
#define MKBETAG(a, b, c, d)
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
int avio_r8(AVIOContext *s)
int flags
A combination of AV_PKT_FLAG values.
#define AV_LOG_INFO
Standard information.
@ AV_PIX_FMT_ARGB
packed ARGB 8:8:8:8, 32bpp, ARGBARGB...
void av_channel_layout_default(AVChannelLayout *ch_layout, int nb_channels)
Get the default channel layout for a given number of channels.
#define i(width, name, range_min, range_max)
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
#define AV_PIX_FMT_RGB555
static int swf_probe(const AVProbeData *p)
@ AV_PIX_FMT_PAL8
8 bits with AV_PIX_FMT_RGB32 palette
int id
Format-specific stream ID.
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
uint8_t * av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type, size_t size)
Allocate new information of a packet.
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
static AVStream * create_new_audio_stream(AVFormatContext *s, int id, int info)
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
const FFInputFormat ff_swf_demuxer
static int read_probe(const AVProbeData *p)
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
This structure stores compressed data.
int64_t pos
byte position in stream, -1 if unknown
#define flags(name, subs,...)
@ AV_PIX_FMT_0RGB
packed RGB 8:8:8, 32bpp, XRGBXRGB... X=unused/undefined
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
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...
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
void * priv_data
Format private data.
static void BS_FUNC() skip(BSCTX *bc, unsigned int n)
Skip n bits in the buffer.
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.