144 lines
3.5 KiB
C++
144 lines
3.5 KiB
C++
/*
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* Copyright 2003-2017 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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/* necessary because libavutil/common.h uses UINT64_C */
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#define __STDC_CONSTANT_MACROS
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#include "config.h"
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#include "FfmpegInputPlugin.hxx"
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#include "lib/ffmpeg/Init.hxx"
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#include "lib/ffmpeg/Domain.hxx"
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#include "lib/ffmpeg/Error.hxx"
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#include "../InputStream.hxx"
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#include "../InputPlugin.hxx"
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#include "PluginUnavailable.hxx"
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#include "util/StringCompare.hxx"
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extern "C" {
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#include <libavformat/avio.h>
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}
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struct FfmpegInputStream final : public InputStream {
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AVIOContext *h;
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bool eof;
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FfmpegInputStream(const char *_uri, Mutex &_mutex, Cond &_cond,
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AVIOContext *_h)
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:InputStream(_uri, _mutex, _cond),
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h(_h), eof(false) {
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seekable = (h->seekable & AVIO_SEEKABLE_NORMAL) != 0;
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size = avio_size(h);
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/* hack to make MPD select the "ffmpeg" decoder plugin
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- since avio.h doesn't tell us the MIME type of the
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resource, we can't select a decoder plugin, but the
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"ffmpeg" plugin is quite good at auto-detection */
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SetMimeType("audio/x-mpd-ffmpeg");
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SetReady();
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}
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~FfmpegInputStream() {
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avio_close(h);
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}
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/* virtual methods from InputStream */
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bool IsEOF() override;
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size_t Read(void *ptr, size_t size) override;
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void Seek(offset_type offset) override;
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};
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static inline bool
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input_ffmpeg_supported(void)
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{
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void *opaque = nullptr;
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return avio_enum_protocols(&opaque, 0) != nullptr;
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}
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static void
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input_ffmpeg_init(EventLoop &, const ConfigBlock &)
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{
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FfmpegInit();
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/* disable this plugin if there's no registered protocol */
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if (!input_ffmpeg_supported())
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throw PluginUnavailable("No protocol");
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}
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static InputStream *
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input_ffmpeg_open(const char *uri,
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Mutex &mutex, Cond &cond)
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{
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if (!StringStartsWith(uri, "gopher://") &&
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!StringStartsWith(uri, "rtp://") &&
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!StringStartsWith(uri, "rtsp://") &&
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!StringStartsWith(uri, "rtmp://") &&
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!StringStartsWith(uri, "rtmpt://") &&
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!StringStartsWith(uri, "rtmps://"))
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return nullptr;
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AVIOContext *h;
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auto result = avio_open(&h, uri, AVIO_FLAG_READ);
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if (result != 0)
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throw MakeFfmpegError(result);
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return new FfmpegInputStream(uri, mutex, cond, h);
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}
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size_t
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FfmpegInputStream::Read(void *ptr, size_t read_size)
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{
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auto result = avio_read(h, (unsigned char *)ptr, read_size);
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if (result <= 0) {
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if (result < 0)
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throw MakeFfmpegError(result, "avio_read() failed");
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eof = true;
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return 0;
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}
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offset += result;
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return (size_t)result;
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}
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bool
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FfmpegInputStream::IsEOF()
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{
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return eof;
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}
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void
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FfmpegInputStream::Seek(offset_type new_offset)
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{
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auto result = avio_seek(h, new_offset, SEEK_SET);
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if (result < 0)
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throw MakeFfmpegError(result, "avio_seek() failed");
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offset = result;
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eof = false;
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}
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const InputPlugin input_plugin_ffmpeg = {
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"ffmpeg",
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input_ffmpeg_init,
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nullptr,
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input_ffmpeg_open,
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};
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