54 0xd79e8283acea4620, 0x7a9762f445afd0d8,
55 0x354d60a60b8c79f1, 0x584e1cde00b07aee,
56 0x1573cd93da7df623, 0x47f98d79620dd535
85 av_log(s, level,
"%s: %s\n", name, buf);
99 if (r_val != oc->
r_val) {
100 memset(oc->
r_val, 0, 24);
101 memcpy(oc->
r_val, r_val, len);
103 memcpy(&oc->
r_val[16], r_val, 8);
106 if (n_val != oc->
n_val) {
107 memset(oc->
n_val, 0, 24);
108 memcpy(oc->
n_val, n_val, len);
110 memcpy(&oc->
n_val[16], n_val, 8);
116 #define OMA_RPROBE_M_VAL 48 + 1
125 if (!enc_header || !r_val ||
126 size < OMA_ENC_HEADER_SIZE + oc->k_size + oc->
e_size + oc->
i_size ||
145 return memcmp(&enc_header[pos], oc->
sm_val, 8) ? -1 : 0;
153 uint32_t taglen, datalen;
156 if (!enc_header || !n_val ||
157 size < OMA_ENC_HEADER_SIZE + oc->k_size + 4)
161 if (!memcmp(&enc_header[pos],
"EKB ", 4))
170 taglen =
AV_RB32(&enc_header[pos+32]);
171 datalen =
AV_RB32(&enc_header[pos+36]) >> 4;
174 if (size - pos < taglen)
179 if (datalen << 4 > size - pos)
183 while (datalen-- > 0) {
205 if (!strcmp(em->
tag,
"GEOB") &&
238 OMA_ENC_HEADER_SIZE + 48 > geob->
datasize) {
242 oc->
rid =
AV_RB32(&gdata[OMA_ENC_HEADER_SIZE + 28]);
245 memcpy(oc->
iv, &header[0x58], 8);
254 rprobe(s, gdata, geob->datasize, oc->r_val) < 0 &&
255 nprobe(s, gdata, geob->datasize, oc->n_val) < 0) {
261 kset(s, buf, buf, 16);
262 if (!
rprobe(s, gdata, geob->datasize, oc->r_val) ||
263 !
nprobe(s, gdata, geob->datasize, oc->n_val))
285 int ret, framesize, jsflag, samplerate;
286 uint32_t codec_params;
308 if (eid != -1 && eid != -128 &&
decrypt_init(s, extra_meta, buf) < 0) {
315 codec_params =
AV_RB24(&buf[33]);
333 if (samplerate != 44100)
337 framesize = (codec_params & 0x3FF) * 8;
338 jsflag = (codec_params >> 17) & 1;
352 AV_WL32(&edata[2], samplerate);
362 framesize = ((codec_params & 0x3FF) * 8) + 8;
405 if (ret < packet_size)
418 if (ret == packet_size)
420 (packet_size >> 3), oc->
iv, 1);
422 memset(oc->
iv, 0, 8);
431 unsigned tag_len = 0;
477 memset(oc->
iv, 0, 8);
490 .extensions =
"oma,omg,aa3",
static int oma_read_header(AVFormatContext *s)
static int rprobe(AVFormatContext *s, uint8_t *enc_header, unsigned size, const uint8_t *r_val)
#define AV_PKT_FLAG_CORRUPT
int av_des_init(AVDES *d, const uint8_t *key, int key_bits, int decrypt)
Initializes an AVDES context.
AVInputFormat ff_oma_demuxer
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
void av_des_mac(AVDES *d, uint8_t *dst, const uint8_t *src, int count)
Calculates CBC-MAC using the DES algorithm.
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
struct OMAContext OMAContext
#define AV_CH_LAYOUT_STEREO
static int kset(AVFormatContext *s, const uint8_t *r_val, const uint8_t *n_val, int len)
int block_align
number of bytes per packet if constant and known or 0 Used by some WAV based audio codecs...
static int oma_read_packet(AVFormatContext *s, AVPacket *pkt)
const AVCodecTag ff_oma_codec_tags[]
#define ID3v2_HEADER_SIZE
int av_log_get_level(void)
enum AVStreamParseType need_parsing
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
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_get_bits_per_sample(enum AVCodecID codec_id)
Return codec bits per sample.
void av_log_ask_for_sample(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message asking for a sample.
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta)
Free memory allocated parsing special (non-text) metadata.
void av_log(void *avcl, int level, const char *fmt,...)
AVStream * avformat_new_stream(AVFormatContext *s, AVCodec *c)
Add a new stream to a media file.
int flags
A combination of AV_PKT_FLAG values.
uint64_t channel_layout
Audio channel layout.
AVCodecContext * codec
Codec context associated with this stream.
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 bit_rate
the average bitrate
audio channel layout utility functions
#define OMA_ENC_HEADER_SIZE
void ff_id3v2_read(AVFormatContext *s, const char *magic, ID3v2ExtraMeta **extra_meta)
Read an ID3v2 tag, including supported extra metadata.
static int read_header(FFV1Context *f)
enum AVMediaType codec_type
static int decrypt_init(AVFormatContext *s, ID3v2ExtraMeta *em, uint8_t *header)
int sample_rate
samples per second
AVIOContext * pb
I/O context.
static void hex_log(AVFormatContext *s, int level, const char *name, const uint8_t *value, int len)
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
static int read_packet(AVFormatContext *ctx, AVPacket *pkt)
#define FF_ARRAY_ELEMS(a)
#define FF_INPUT_BUFFER_PADDING_SIZE
static const uint64_t leaf_table[]
This structure contains the data a format has to probe a file.
static int oma_read_seek(struct AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
void av_des_crypt(AVDES *d, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt)
Encrypts / decrypts using the DES algorithm.
int ff_id3v2_match(const uint8_t *buf, const char *magic)
Detect ID3v2 Header.
int64_t start_time
Decoding: pts of the first frame of the stream, in stream time base.
#define AVERROR_INVALIDDATA
#define AVPROBE_SCORE_MAX
static int nprobe(AVFormatContext *s, uint8_t *enc_header, unsigned size, const uint8_t *n_val)
int channels
number of audio channels
int ff_id3v2_tag_len(const uint8_t *buf)
Get the length of an ID3v2 tag.
void * priv_data
Format private data.
This structure stores compressed data.
const uint16_t ff_oma_srate_tab[8]
void * av_mallocz(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
#define AVFMT_GENERIC_INDEX
static int oma_read_probe(AVProbeData *p)