35 #define RIFF_TAG MKTAG('R', 'I', 'F', 'F')
36 #define FOURXMV_TAG MKTAG('4', 'X', 'M', 'V')
37 #define LIST_TAG MKTAG('L', 'I', 'S', 'T')
38 #define HEAD_TAG MKTAG('H', 'E', 'A', 'D')
39 #define TRK__TAG MKTAG('T', 'R', 'K', '_')
40 #define MOVI_TAG MKTAG('M', 'O', 'V', 'I')
41 #define VTRK_TAG MKTAG('V', 'T', 'R', 'K')
42 #define STRK_TAG MKTAG('S', 'T', 'R', 'K')
43 #define std__TAG MKTAG('s', 't', 'd', '_')
44 #define name_TAG MKTAG('n', 'a', 'm', 'e')
45 #define vtrk_TAG MKTAG('v', 't', 'r', 'k')
46 #define strk_TAG MKTAG('s', 't', 'r', 'k')
47 #define ifrm_TAG MKTAG('i', 'f', 'r', 'm')
48 #define pfrm_TAG MKTAG('p', 'f', 'r', 'm')
49 #define cfrm_TAG MKTAG('c', 'f', 'r', 'm')
50 #define ifr2_TAG MKTAG('i', 'f', 'r', '2')
51 #define pfr2_TAG MKTAG('p', 'f', 'r', '2')
52 #define cfr2_TAG MKTAG('c', 'f', 'r', '2')
53 #define snd__TAG MKTAG('s', 'n', 'd', '_')
55 #define vtrk_SIZE 0x44
56 #define strk_SIZE 0x28
58 #define GET_LIST_HEADER() \
59 fourcc_tag = avio_rl32(pb); \
60 size = avio_rl32(pb); \
61 if (fourcc_tag != LIST_TAG) \
62 return AVERROR_INVALIDDATA; \
63 fourcc_tag = avio_rl32(pb);
98 if (size !=
vtrk_SIZE || left < size + 8) {
133 if (size !=
strk_SIZE || left < size + 8)
137 if ((
unsigned)track >= UINT_MAX /
sizeof(
AudioTrack) - 1) {
200 unsigned int fourcc_tag;
216 header_size = size - 4;
217 if (fourcc_tag !=
HEAD_TAG || header_size < 0)
224 if (
avio_read(pb, header, header_size) != header_size) {
230 for (i = 0; i < header_size - 8; i++) {
231 fourcc_tag =
AV_RL32(&header[i]);
232 size =
AV_RL32(&header[i + 4]);
233 if (size > header_size - i - 8 && (fourcc_tag ==
vtrk_TAG || fourcc_tag ==
strk_TAG)) {
234 av_log(s,
AV_LOG_ERROR,
"chunk larger than array %d>%d\n", size, header_size - i - 8);
239 if (header_size - i < 16) {
245 }
else if (fourcc_tag ==
vtrk_TAG) {
246 if ((ret =
parse_vtrk(s, fourxm, header + i, size,
247 header_size - i)) < 0)
251 }
else if (fourcc_tag ==
strk_TAG) {
252 if ((ret =
parse_strk(s, fourxm, header + i, size,
253 header_size - i)) < 0)
283 unsigned int fourcc_tag;
286 unsigned int track_number;
291 while (!packet_read) {
294 fourcc_tag =
AV_RL32(&header[0]);
298 switch (fourcc_tag) {
320 memcpy(pkt->
data, header, 8);
336 if (track_number < fourxm->track_count &&
347 audio_frame_count =
size;
352 audio_frame_count *= 2;
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
void av_free_packet(AVPacket *pkt)
Free a packet.
int64_t pos
byte position in stream, -1 if unknown
void av_shrink_packet(AVPacket *pkt, int size)
Reduce packet size, correctly zeroing padding.
static av_always_inline float av_int2float(uint32_t i)
Reinterpret a 32-bit integer as a float.
int index
stream index in AVFormatContext
static int audio_frame_count
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
int block_align
number of bytes per packet if constant and known or 0 Used by some WAV based audio codecs...
int id
Format-specific stream ID.
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
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)
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
static const uint8_t header[24]
int bits_per_coded_sample
bits per sample/pixel from the demuxer (needed for huffyuv).
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
int av_reallocp_array(void *ptr, size_t nmemb, size_t size)
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
unsigned int avio_rl32(AVIOContext *s)
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
AVCodecContext * codec
Codec context associated with this stream.
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
#define FF_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
int bit_rate
the average bitrate
AVRational av_d2q(double d, int max)
Convert a double precision floating point number to a rational.
int width
picture width / height.
static int read_header(FFV1Context *f)
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
enum AVMediaType codec_type
int sample_rate
samples per second
AVIOContext * pb
I/O context.
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
rational number numerator/denominator
This structure contains the data a format has to probe a file.
int channels
number of audio channels
void * priv_data
Format private data.
int avio_feof(AVIOContext *s)
feof() equivalent for AVIOContext.
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
This structure stores compressed data.
void * av_mallocz(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...