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/*
* Copyright (C) 2003-2014 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
/* necessary because libavutil/common.h uses UINT64_C */
#define __STDC_CONSTANT_MACROS
#include "config.h"
#include "FfmpegInputPlugin.hxx"
#include "../InputStream.hxx"
#include "../InputPlugin.hxx"
#include "util/StringUtil.hxx"
#include "util/Error.hxx"
#include "util/Domain.hxx"
extern "C" {
#include <libavformat/avio.h>
#include <libavformat/avformat.h>
}
struct FfmpegInputStream final : public InputStream {
AVIOContext *h;
bool eof;
FfmpegInputStream(const char *_uri, Mutex &_mutex, Cond &_cond,
AVIOContext *_h)
:InputStream(_uri, _mutex, _cond),
h(_h), eof(false) {
seekable = (h->seekable & AVIO_SEEKABLE_NORMAL) != 0;
size = avio_size(h);
/* hack to make MPD select the "ffmpeg" decoder plugin
- since avio.h doesn't tell us the MIME type of the
resource, we can't select a decoder plugin, but the
"ffmpeg" plugin is quite good at auto-detection */
SetMimeType("audio/x-mpd-ffmpeg");
SetReady();
}
~FfmpegInputStream() {
avio_close(h);
}
/* virtual methods from InputStream */
bool IsEOF() override;
size_t Read(void *ptr, size_t size, Error &error) override;
bool Seek(offset_type offset, Error &error) override;
};
static constexpr Domain ffmpeg_domain("ffmpeg");
static inline bool
input_ffmpeg_supported(void)
{
void *opaque = nullptr;
return avio_enum_protocols(&opaque, 0) != nullptr;
}
static InputPlugin::InitResult
input_ffmpeg_init(gcc_unused const config_param ¶m,
Error &error)
{
av_register_all();
/* disable this plugin if there's no registered protocol */
if (!input_ffmpeg_supported()) {
error.Set(ffmpeg_domain, "No protocol");
return InputPlugin::InitResult::UNAVAILABLE;
}
return InputPlugin::InitResult::SUCCESS;
}
static InputStream *
input_ffmpeg_open(const char *uri,
Mutex &mutex, Cond &cond,
Error &error)
{
if (!StringStartsWith(uri, "gopher://") &&
!StringStartsWith(uri, "rtp://") &&
!StringStartsWith(uri, "rtsp://") &&
!StringStartsWith(uri, "rtmp://") &&
!StringStartsWith(uri, "rtmpt://") &&
!StringStartsWith(uri, "rtmps://"))
return nullptr;
AVIOContext *h;
int ret = avio_open(&h, uri, AVIO_FLAG_READ);
if (ret != 0) {
error.Set(ffmpeg_domain, ret,
"libavformat failed to open the URI");
return nullptr;
}
return new FfmpegInputStream(uri, mutex, cond, h);
}
size_t
FfmpegInputStream::Read(void *ptr, size_t read_size, Error &error)
{
int ret = avio_read(h, (unsigned char *)ptr, read_size);
if (ret <= 0) {
if (ret < 0)
error.Set(ffmpeg_domain, "avio_read() failed");
eof = true;
return false;
}
offset += ret;
return (size_t)ret;
}
bool
FfmpegInputStream::IsEOF()
{
return eof;
}
bool
FfmpegInputStream::Seek(offset_type new_offset, Error &error)
{
int64_t ret = avio_seek(h, new_offset, SEEK_SET);
if (ret >= 0) {
eof = false;
return true;
} else {
error.Set(ffmpeg_domain, "avio_seek() failed");
return false;
}
}
const InputPlugin input_plugin_ffmpeg = {
"ffmpeg",
input_ffmpeg_init,
nullptr,
input_ffmpeg_open,
};
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