37 #define FORM_TAG MKTAG('F', 'O', 'R', 'M') 38 #define MOVE_TAG MKTAG('M', 'O', 'V', 'E') 39 #define PC__TAG MKTAG('_', 'P', 'C', '_') 40 #define SOND_TAG MKTAG('S', 'O', 'N', 'D') 41 #define BNAM_TAG MKTAG('B', 'N', 'A', 'M') 42 #define SIZE_TAG MKTAG('S', 'I', 'Z', 'E') 43 #define PALT_TAG MKTAG('P', 'A', 'L', 'T') 44 #define INDX_TAG MKTAG('I', 'N', 'D', 'X') 45 #define BRCH_TAG MKTAG('B', 'R', 'C', 'H') 46 #define SHOT_TAG MKTAG('S', 'H', 'O', 'T') 47 #define VGA__TAG MKTAG('V', 'G', 'A', ' ') 48 #define TEXT_TAG MKTAG('T', 'E', 'X', 'T') 49 #define AUDI_TAG MKTAG('A', 'U', 'D', 'I') 52 #define WC3_DEFAULT_WIDTH 320 53 #define WC3_DEFAULT_HEIGHT 165 56 #define WC3_SAMPLE_RATE 22050 57 #define WC3_AUDIO_CHANNELS 1 58 #define WC3_AUDIO_BITS 16 61 #define WC3_FRAME_FPS 15 63 #define PALETTE_SIZE (256 * 3) 102 unsigned int fourcc_tag;
125 switch (fourcc_tag) {
146 if ((ret =
avio_read(pb, buffer, size)) != size) {
228 unsigned int fourcc_tag;
232 unsigned char text[1024];
234 while (!packet_read) {
242 switch (fourcc_tag) {
270 if ((
unsigned)size >
sizeof(text) || (ret =
avio_read(pb, text, size)) != size)
275 if (i >= size ||
av_strnlen(&text[i + 1], size - i - 1) >= size - i - 1)
279 if (i >= size ||
av_strnlen(&text[i + 1], size - i - 1) >= size - i - 1)
283 if (i >= size ||
av_strnlen(&text[i + 1], size - i - 1) >= size - i - 1)
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
size_t static size_t av_strnlen(const char *s, size_t len)
Get the count of continuous non zero chars starting from the beginning.
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
int index
stream index in AVFormatContext
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
#define WC3_DEFAULT_HEIGHT
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
static int wc3_read_close(AVFormatContext *s)
unsigned int avio_rb32(AVIOContext *s)
AVInputFormat ff_wc3_demuxer
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
static av_cold int read_close(AVFormatContext *ctx)
uint64_t channel_layout
Audio only.
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
AVDictionary * metadata
Metadata that applies to the whole file.
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.
#define av_fourcc2str(fourcc)
enum AVMediaType codec_type
General type of the encoded data.
#define WC3_DEFAULT_WIDTH
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 block_align
Audio only.
audio channel layout utility functions
#define AV_DICT_DONT_STRDUP_VAL
Take ownership of a value that's been allocated with av_malloc() or another memory allocation functio...
static int read_header(FFV1Context *f)
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
AVIOContext * pb
I/O context.
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
static int wc3_read_packet(AVFormatContext *s, AVPacket *pkt)
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
This structure contains the data a format has to probe a file.
#define WC3_AUDIO_CHANNELS
int sample_rate
Audio only.
static int wc3_read_header(AVFormatContext *s)
void av_init_packet(AVPacket *pkt)
Initialize optional fields of a packet with default values.
void * priv_data
Format private data.
int bits_per_coded_sample
The number of bits per sample in the codedwords.
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 int wc3_probe(const AVProbeData *p)
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
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
This structure stores compressed data.
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...