29 #define APM_FILE_HEADER_SIZE 20
30 #define APM_FILE_EXTRADATA_SIZE 80
31 #define APM_EXTRADATA_SIZE 28
33 #define APM_MAX_READ_SIZE 4096
35 #define APM_TAG_CODEC 0x2000
36 #define APM_TAG_VS12 MKTAG('v', 's', '1', '2')
37 #define APM_TAG_DATA MKTAG('D', 'A', 'T', 'A')
60 #if CONFIG_APM_DEMUXER
159 apm_parse_extradata(&extradata, buf);
207 .read_probe = apm_probe,
208 .read_header = apm_read_header,
209 .read_packet = apm_read_packet
218 if (
s->nb_streams != 1) {
223 par =
s->streams[0]->codecpar;
292 if (file_size >= UINT32_MAX) {
294 "Filesize %"PRId64
" invalid for APM, output file will be broken\n",
312 .init = apm_write_init,
313 .write_header = apm_write_header,
315 .write_trailer = apm_write_trailer
#define APM_FILE_EXTRADATA_SIZE
#define APM_FILE_HEADER_SIZE
#define APM_EXTRADATA_SIZE
#define APM_MAX_READ_SIZE
simple assert() macros that are a bit more flexible than ISO C assert().
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
void avio_wl32(AVIOContext *s, unsigned int val)
void avio_wl16(AVIOContext *s, unsigned int val)
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
unsigned int avio_rl16(AVIOContext *s)
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
unsigned int avio_rl32(AVIOContext *s)
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
#define AV_CH_LAYOUT_MONO
#define AV_CH_LAYOUT_STEREO
const char * avcodec_get_name(enum AVCodecID id)
Get the name of a codec.
@ AV_CODEC_ID_ADPCM_IMA_APM
#define AV_PKT_FLAG_CORRUPT
The packet content is corrupted.
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
@ AV_SAMPLE_FMT_S16
signed 16 bits
common internal API header
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
#define FF_ARRAY_ELEMS(a)
This struct describes the properties of an encoded stream.
int extradata_size
Size of the extradata content in bytes.
uint64_t channel_layout
Audio only.
int bits_per_coded_sample
The number of bits per sample in the codedwords.
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
enum AVMediaType codec_type
General type of the encoded data.
int block_align
Audio only.
int bits_per_raw_sample
This is the number of valid bits in each output sample.
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.
int flags
A combination of AV_PKT_FLAG values.
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.
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.
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.
#define avpriv_request_sample(...)