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decoder/ffmpeg: move struct AvioStream to FfmpegIo.hxx

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This commit is contained in:
Max Kellermann
2014-12-19 10:35:10 +01:00
parent 42c5f68362
commit df97049647
4 changed files with 151 additions and 84 deletions
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85
src/decoder/plugins/FfmpegDecoderPlugin.cxx
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@@ -29,6 +29,7 @@
#include "lib/ffmpeg/Buffer.hxx"
#include "../DecoderAPI.hxx"
#include "FfmpegMetaData.hxx"
#include "FfmpegIo.hxx"
#include "tag/TagHandler.hxx"
#include "input/InputStream.hxx"
#include "CheckAudioFormat.hxx"
@@ -85,90 +86,6 @@ mpd_ffmpeg_log_callback(gcc_unused void *ptr, int level,
}
}
struct AvioStream {
Decoder *const decoder;
InputStream &input;
AVIOContext *io;
AvioStream(Decoder *_decoder, InputStream &_input)
:decoder(_decoder), input(_input), io(nullptr) {}
~AvioStream() {
if (io != nullptr) {
av_free(io->buffer);
av_free(io);
}
}
bool Open();
};
static int
mpd_ffmpeg_stream_read(void *opaque, uint8_t *buf, int size)
{
AvioStream *stream = (AvioStream *)opaque;
return decoder_read(stream->decoder, stream->input,
(void *)buf, size);
}
static int64_t
mpd_ffmpeg_stream_seek(void *opaque, int64_t pos, int whence)
{
AvioStream *stream = (AvioStream *)opaque;
switch (whence) {
case SEEK_SET:
break;
case SEEK_CUR:
pos += stream->input.GetOffset();
break;
case SEEK_END:
if (!stream->input.KnownSize())
return -1;
pos += stream->input.GetSize();
break;
case AVSEEK_SIZE:
if (!stream->input.KnownSize())
return -1;
return stream->input.GetSize();
default:
return -1;
}
if (!stream->input.LockSeek(pos, IgnoreError()))
return -1;
return stream->input.GetOffset();
}
bool
AvioStream::Open()
{
constexpr size_t BUFFER_SIZE = 8192;
auto buffer = (unsigned char *)av_malloc(BUFFER_SIZE);
if (buffer == nullptr)
return false;
io = avio_alloc_context(buffer, BUFFER_SIZE,
false, this,
mpd_ffmpeg_stream_read, nullptr,
input.IsSeekable()
? mpd_ffmpeg_stream_seek : nullptr);
/* If avio_alloc_context() fails, who frees the buffer? The
libavformat API documentation does not specify this, it
only says that AVIOContext.buffer must be freed in the end,
however no AVIOContext exists in that failure code path. */
return io != nullptr;
}
/**
* API compatibility wrapper for av_open_input_stream() and
* avformat_open_input().