50 uint32_t header_size, data_size, data_offset, loop_start, loop_end,
51 nb_samples, nb_metadata, coef_offset = 0;
109 if (file_size - data_size > UINT32_MAX)
119 if (0x30 * par->
channels + 0x4 > header_size)
121 data_offset = header_size - 0x30 * par->
channels - 0x4;
122 if ((ret_size =
avio_seek(
s->pb, data_offset, SEEK_SET)) < 0)
128 if ((
int64_t)header_size + data_size > file_size) {
130 "MCA metadata corrupted, unable to determine the data offset.\n");
135 "Incorrect header size found in metadata, "
136 "header size approximated from the data size\n");
137 if (file_size - data_offset > UINT32_MAX)
147 if (0x30 * par->
channels + nb_metadata * 0x14 > header_size)
150 header_size - 0x30 * par->
channels + nb_metadata * 0x14;
159 if ((ret_size =
avio_seek(
s->pb, coef_offset, SEEK_SET)) < 0)
161 for (ch = 0; ch < par->
channels; ch++) {
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
int64_t avio_size(AVIOContext *s)
Get the filesize.
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
unsigned int avio_rl16(AVIOContext *s)
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
unsigned int avio_rl32(AVIOContext *s)
int avio_r8(AVIOContext *s)
int ffio_read_size(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
#define flags(name, subs,...)
#define MKTAG(a, b, c, d)
@ AV_CODEC_ID_ADPCM_THP_LE
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
int av_dict_set_int(AVDictionary **pm, const char *key, int64_t value, int flags)
Convenience wrapper for av_dict_set that converts the value to a string and stores it.
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
#define AVERROR_EOF
End of file.
#define AV_LOG_WARNING
Something somehow does not look correct.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
int64_t av_rescale(int64_t a, int64_t b, int64_t c)
Rescale a 64-bit integer with rounding to nearest.
#define AV_TIME_BASE
Internal time base represented as integer.
common internal API header
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
static int read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
AVInputFormat ff_mca_demuxer
static int read_packet(AVFormatContext *s, AVPacket *pkt)
static int read_header(AVFormatContext *s)
static int probe(const AVProbeData *p)
This struct describes the properties of an encoded stream.
enum AVMediaType codec_type
General type of the encoded data.
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
int sample_rate
Audio only.
This structure stores compressed data.
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
This structure contains the data a format has to probe a file.
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
AVCodecParameters * codecpar
Codec parameters associated with this stream.
int64_t duration
Decoding: duration of the stream, in stream time base.
int64_t start_time
Decoding: pts of the first frame of the stream in presentation order, in stream time base.
uint32_t samples_per_block
#define avpriv_request_sample(...)