166 lines
3.9 KiB
C++
166 lines
3.9 KiB
C++
/*
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* Copyright (C) 2003-2014 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 "../InputStream.hxx"
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#include "../InputPlugin.hxx"
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#include "util/StringUtil.hxx"
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#include "util/Error.hxx"
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#include "util/Domain.hxx"
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extern "C" {
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#include <libavformat/avio.h>
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#include <libavformat/avformat.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(input_plugin_ffmpeg, _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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};
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static constexpr Domain ffmpeg_domain("ffmpeg");
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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 InputPlugin::InitResult
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input_ffmpeg_init(gcc_unused const config_param ¶m,
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Error &error)
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{
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av_register_all();
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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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error.Set(ffmpeg_domain, "No protocol");
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return InputPlugin::InitResult::UNAVAILABLE;
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}
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return InputPlugin::InitResult::SUCCESS;
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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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Error &error)
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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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int ret = avio_open(&h, uri, AVIO_FLAG_READ);
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if (ret != 0) {
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error.Set(ffmpeg_domain, ret,
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"libavformat failed to open the URI");
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return nullptr;
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}
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return new FfmpegInputStream(uri, mutex, cond, h);
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}
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static size_t
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input_ffmpeg_read(InputStream *is, void *ptr, size_t size,
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Error &error)
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{
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FfmpegInputStream *i = (FfmpegInputStream *)is;
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int ret = avio_read(i->h, (unsigned char *)ptr, size);
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if (ret <= 0) {
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if (ret < 0)
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error.Set(ffmpeg_domain, "avio_read() failed");
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i->eof = true;
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return false;
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}
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is->offset += ret;
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return (size_t)ret;
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}
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static bool
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input_ffmpeg_eof(InputStream *is)
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{
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FfmpegInputStream *i = (FfmpegInputStream *)is;
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return i->eof;
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}
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static bool
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input_ffmpeg_seek(InputStream *is, InputPlugin::offset_type offset,
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int whence,
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Error &error)
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{
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FfmpegInputStream *i = (FfmpegInputStream *)is;
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int64_t ret = avio_seek(i->h, offset, whence);
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if (ret >= 0) {
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i->eof = false;
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return true;
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} else {
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error.Set(ffmpeg_domain, "avio_seek() failed");
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return false;
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}
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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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nullptr,
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nullptr,
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nullptr,
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nullptr,
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input_ffmpeg_read,
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input_ffmpeg_eof,
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input_ffmpeg_seek,
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};
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