func (ctx *Context) ReadFrame(pkt *avcodec.Packet) (bool, error) {
cPkt := (*C.AVPacket)(unsafe.Pointer(&pkt.CAVPacket))
code := C.av_read_frame(ctx.CAVFormatContext, cPkt)
if code < 0 {
if avutil.ErrorCode(code) == avutil.ErrorCodeEOF {
return false, nil
}
return false, avutil.NewErrorFromCode(avutil.ErrorCode(code))
}
return true, nil
}
func (g *Graph) Config() error {
code := C.avfilter_graph_config(g.CAVFilterGraph, nil)
if code < 0 {
return avutil.NewErrorFromCode(avutil.ErrorCode(code))
}
return nil
}
func (ctx *Context) WriteTrailer() error {
code := C.av_write_trailer(ctx.CAVFormatContext)
if code < 0 {
return avutil.NewErrorFromCode(avutil.ErrorCode(code))
}
return nil
}
func (ctx *Context) GetFrame(frame *avutil.Frame) (bool, error) {
var cFrame *C.AVFrame
if frame != nil {
cFrame = (*C.AVFrame)(unsafe.Pointer(frame.CAVFrame))
}
code := C.av_buffersink_get_frame(ctx.CAVFilterContext, cFrame)
if code < 0 {
switch avutil.ErrorCode(code) {
case avutil.ErrorCode(C.GO_AVERROR(C.EAGAIN)):
return false, nil
case avutil.ErrorCodeEOF:
return false, nil
}
return false, avutil.NewErrorFromCode(avutil.ErrorCode(code))
}
return true, nil
}
func NewContextForOutput(output *Output) (*Context, error) {
var cCtx *C.AVFormatContext
code := C.avformat_alloc_output_context2(&cCtx, output.CAVOutputFormat, nil, nil)
if code < 0 {
return nil, avutil.NewErrorFromCode(avutil.ErrorCode(code))
}
return NewContextFromC(unsafe.Pointer(cCtx)), nil
}
func (ctx *Context) Link(srcPad uint, dst *Context, dstPad uint) error {
cSrc := ctx.CAVFilterContext
cDst := dst.CAVFilterContext
code := C.avfilter_link(cSrc, C.uint(srcPad), cDst, C.uint(dstPad))
if code < 0 {
return avutil.NewErrorFromCode(avutil.ErrorCode(code))
}
return nil
}
func (ctx *Context) InitWithString(args string) error {
cArgs := C.CString(args)
defer C.free(unsafe.Pointer(cArgs))
code := C.avfilter_init_str(ctx.CAVFilterContext, cArgs)
if code < 0 {
return avutil.NewErrorFromCode(avutil.ErrorCode(code))
}
return nil
}
func (g *Graph) Parse(filters string, input, output *InOut) error {
cFilters := C.CString(filters)
defer C.free(unsafe.Pointer(cFilters))
cInput := &input.CAVFilterInOut
cOutput := &output.CAVFilterInOut
code := C.avfilter_graph_parse_ptr(g.CAVFilterGraph, cFilters, cInput, cOutput, nil)
if code < 0 {
return avutil.NewErrorFromCode(avutil.ErrorCode(code))
}
return nil
}
func (ctx *Context) WriteFrame(frame *avutil.Frame) error {
var cFrame *C.AVFrame
if frame != nil {
cFrame = (*C.AVFrame)(unsafe.Pointer(frame.CAVFrame))
}
code := C.av_buffersrc_write_frame(ctx.CAVFilterContext, cFrame)
if code < 0 {
return avutil.NewErrorFromCode(avutil.ErrorCode(code))
}
return nil
}
func (ctx *Context) AddFrameWithFlags(frame *avutil.Frame, flags BufferSrcFlags) error {
var cFrame *C.AVFrame
if frame != nil {
cFrame = (*C.AVFrame)(unsafe.Pointer(frame.CAVFrame))
}
code := C.av_buffersrc_add_frame_flags(ctx.CAVFilterContext, cFrame, (C.int)(flags))
if code < 0 {
return avutil.NewErrorFromCode(avutil.ErrorCode(code))
}
return nil
}
func (ctx *Context) InitWithDictionary(options *avutil.Dictionary) error {
var cOptions **C.AVDictionary
if options != nil {
cOptions = (**C.AVDictionary)(unsafe.Pointer(&options.CAVDictionary))
}
code := C.avfilter_init_dict(ctx.CAVFilterContext, cOptions)
if code < 0 {
return avutil.NewErrorFromCode(avutil.ErrorCode(code))
}
return nil
}
func (ctx *Context) InterleavedWriteFrame(pkt *avcodec.Packet) error {
var cPkt *C.AVPacket
if pkt != nil {
cPkt = (*C.AVPacket)(unsafe.Pointer(&pkt.CAVPacket))
}
code := C.av_interleaved_write_frame(ctx.CAVFormatContext, cPkt)
if code < 0 {
return avutil.NewErrorFromCode(avutil.ErrorCode(code))
}
return nil
}
func (ctx *Context) WriteHeader(options *avutil.Dictionary) error {
var cOptions **C.AVDictionary
if options != nil {
cOptions = (**C.AVDictionary)(unsafe.Pointer(&options.CAVDictionary))
}
code := C.avformat_write_header(ctx.CAVFormatContext, cOptions)
if code < 0 {
return avutil.NewErrorFromCode(avutil.ErrorCode(code))
}
return nil
}
func (ctx *Context) FindStreamInfo(options []*avutil.Dictionary) error {
var cOptions **C.AVDictionary
count := ctx.NumberOfStreams()
if count > 0 && options != nil {
if uint(len(options)) < count {
return ErrInvalidArgumentSize
}
cOptions = newCAVDictionaryArrayFromDictionarySlice(options[:count])
defer freeCAVDictionaryArray(cOptions)
}
code := C.avformat_find_stream_info(ctx.CAVFormatContext, cOptions)
if code < 0 {
return avutil.NewErrorFromCode(avutil.ErrorCode(code))
}
return nil
}
func (ctx *Context) OpenInput(fileName string, input *Input, options *avutil.Dictionary) error {
cFileName := C.CString(fileName)
defer C.free(unsafe.Pointer(cFileName))
var cInput *C.AVInputFormat
if input != nil {
cInput = input.CAVInputFormat
}
var cOptions **C.AVDictionary
if options != nil {
cOptions = (**C.AVDictionary)(unsafe.Pointer(&options.CAVDictionary))
}
code := C.avformat_open_input(&ctx.CAVFormatContext, cFileName, cInput, cOptions)
if code < 0 {
return avutil.NewErrorFromCode(avutil.ErrorCode(code))
}
return nil
}
func OpenIOContext(url string, flags IOFlags, cb *IOInterruptCallback, options *avutil.Dictionary) (*IOContext, error) {
cURL := C.CString(url)
defer C.free(unsafe.Pointer(cURL))
var cCb *C.AVIOInterruptCB
if cb != nil {
cCb = cb.CAVIOInterruptCB
}
var cOptions **C.AVDictionary
if options != nil {
cOptions = (**C.AVDictionary)(unsafe.Pointer(&options.CAVDictionary))
}
var cCtx *C.AVIOContext
code := C.avio_open2(&cCtx, cURL, (C.int)(flags), cCb, cOptions)
if code < 0 {
return nil, avutil.NewErrorFromCode(avutil.ErrorCode(code))
}
return NewIOContextFromC(unsafe.Pointer(cCtx)), nil
}