28 #include <sys/ioctl.h> 29 #include <sys/soundcard.h> 73 if (ret < 0 && (errno != EAGAIN && errno != EINTR))
static int audio_write_trailer(AVFormatContext *s1)
#define LIBAVUTIL_VERSION_INT
const char * av_default_item_name(void *ptr)
Return the context name.
AVOutputFormat ff_oss_muxer
uint8_t buffer[OSS_AUDIO_BLOCK_SIZE]
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
AVStream ** streams
A list of all streams in the file.
#define OSS_AUDIO_BLOCK_SIZE
int ff_oss_audio_open(AVFormatContext *s1, int is_output, const char *audio_device)
Main libavdevice API header.
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
char * url
input or output URL.
common internal API header
Libavcodec external API header.
Describe the class of an AVClass context structure.
static int audio_write_packet(AVFormatContext *s1, AVPacket *pkt)
int sample_rate
Audio only.
static int audio_write_header(AVFormatContext *s1)
int ff_oss_audio_close(OSSAudioData *s)
void * priv_data
Format private data.
static const AVClass oss_muxer_class
AVCodecParameters * codecpar
Codec parameters associated with this stream.
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
This structure stores compressed data.