decoder/*: move to decoder/plugins/
This commit is contained in:
Max Kellermann
349
src/decoder/plugins/VorbisDecoderPlugin.cxx
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349
src/decoder/plugins/VorbisDecoderPlugin.cxx
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/*
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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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#include "config.h"
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#include "VorbisDecoderPlugin.h"
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#include "VorbisComments.hxx"
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#include "VorbisDomain.hxx"
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#include "../DecoderAPI.hxx"
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#include "InputStream.hxx"
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#include "OggCodec.hxx"
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#include "util/Error.hxx"
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#include "util/Macros.hxx"
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#include "CheckAudioFormat.hxx"
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#include "tag/TagHandler.hxx"
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#include "Log.hxx"
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#ifndef HAVE_TREMOR
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#define OV_EXCLUDE_STATIC_CALLBACKS
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#include <vorbis/vorbisfile.h>
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#else
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#include <tremor/ivorbisfile.h>
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/* Macros to make Tremor's API look like libogg. Tremor always
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returns host-byte-order 16-bit signed data, and uses integer
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milliseconds where libogg uses double seconds.
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*/
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#define ov_read(VF, BUFFER, LENGTH, BIGENDIANP, WORD, SGNED, BITSTREAM) \
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ov_read(VF, BUFFER, LENGTH, BITSTREAM)
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#define ov_time_total(VF, I) ((double)ov_time_total(VF, I)/1000)
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#define ov_time_tell(VF) ((double)ov_time_tell(VF)/1000)
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#define ov_time_seek_page(VF, S) (ov_time_seek_page(VF, (S)*1000))
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#endif /* HAVE_TREMOR */
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#include <errno.h>
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struct vorbis_input_stream {
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Decoder *decoder;
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InputStream *input_stream;
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bool seekable;
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};
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static size_t ogg_read_cb(void *ptr, size_t size, size_t nmemb, void *data)
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{
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struct vorbis_input_stream *vis = (struct vorbis_input_stream *)data;
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size_t ret = decoder_read(vis->decoder, *vis->input_stream,
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ptr, size * nmemb);
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errno = 0;
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return ret / size;
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}
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static int ogg_seek_cb(void *data, ogg_int64_t offset, int whence)
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{
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struct vorbis_input_stream *vis = (struct vorbis_input_stream *)data;
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Error error;
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return vis->seekable &&
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(vis->decoder == nullptr ||
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decoder_get_command(*vis->decoder) != DecoderCommand::STOP) &&
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vis->input_stream->LockSeek(offset, whence, error)
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? 0 : -1;
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}
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/* TODO: check Ogg libraries API and see if we can just not have this func */
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static int ogg_close_cb(gcc_unused void *data)
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{
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return 0;
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}
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static long ogg_tell_cb(void *data)
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{
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struct vorbis_input_stream *vis = (struct vorbis_input_stream *)data;
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return (long)vis->input_stream->offset;
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}
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static const ov_callbacks vorbis_is_callbacks = {
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ogg_read_cb,
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ogg_seek_cb,
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ogg_close_cb,
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ogg_tell_cb,
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};
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static const char *
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vorbis_strerror(int code)
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{
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switch (code) {
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case OV_EREAD:
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return "read error";
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case OV_ENOTVORBIS:
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return "not vorbis stream";
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case OV_EVERSION:
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return "vorbis version mismatch";
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case OV_EBADHEADER:
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return "invalid vorbis header";
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case OV_EFAULT:
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return "internal logic error";
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default:
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return "unknown error";
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}
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}
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static bool
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vorbis_is_open(struct vorbis_input_stream *vis, OggVorbis_File *vf,
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Decoder *decoder, InputStream &input_stream)
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{
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vis->decoder = decoder;
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vis->input_stream = &input_stream;
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vis->seekable = input_stream.CheapSeeking();
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int ret = ov_open_callbacks(vis, vf, nullptr, 0, vorbis_is_callbacks);
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if (ret < 0) {
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if (decoder == nullptr ||
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decoder_get_command(*decoder) == DecoderCommand::NONE)
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FormatWarning(vorbis_domain,
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"Failed to open Ogg Vorbis stream: %s",
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vorbis_strerror(ret));
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return false;
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}
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return true;
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}
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static void
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vorbis_send_comments(Decoder &decoder, InputStream &is,
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char **comments)
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{
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Tag *tag = vorbis_comments_to_tag(comments);
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if (!tag)
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return;
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decoder_tag(decoder, is, std::move(*tag));
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delete tag;
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}
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#ifndef HAVE_TREMOR
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static void
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vorbis_interleave(float *dest, const float *const*src,
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unsigned nframes, unsigned channels)
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{
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for (const float *const*src_end = src + channels;
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src != src_end; ++src, ++dest) {
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float *d = dest;
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for (const float *s = *src, *s_end = s + nframes;
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s != s_end; ++s, d += channels)
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*d = *s;
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}
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}
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#endif
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/* public */
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static void
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vorbis_stream_decode(Decoder &decoder,
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InputStream &input_stream)
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{
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if (ogg_codec_detect(&decoder, input_stream) != OGG_CODEC_VORBIS)
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return;
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/* rewind the stream, because ogg_codec_detect() has
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moved it */
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input_stream.LockRewind(IgnoreError());
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struct vorbis_input_stream vis;
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OggVorbis_File vf;
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if (!vorbis_is_open(&vis, &vf, &decoder, input_stream))
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return;
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const vorbis_info *vi = ov_info(&vf, -1);
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if (vi == nullptr) {
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LogWarning(vorbis_domain, "ov_info() has failed");
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return;
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}
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Error error;
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AudioFormat audio_format;
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if (!audio_format_init_checked(audio_format, vi->rate,
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#ifdef HAVE_TREMOR
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SampleFormat::S16,
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#else
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SampleFormat::FLOAT,
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#endif
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vi->channels, error)) {
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LogError(error);
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return;
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}
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float total_time = ov_time_total(&vf, -1);
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if (total_time < 0)
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total_time = 0;
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decoder_initialized(decoder, audio_format, vis.seekable, total_time);
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#ifdef HAVE_TREMOR
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char buffer[4096];
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#else
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float buffer[2048];
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const int frames_per_buffer =
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ARRAY_SIZE(buffer) / audio_format.channels;
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const unsigned frame_size = sizeof(buffer[0]) * audio_format.channels;
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#endif
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int prev_section = -1;
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unsigned kbit_rate = 0;
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DecoderCommand cmd = decoder_get_command(decoder);
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do {
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if (cmd == DecoderCommand::SEEK) {
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double seek_where = decoder_seek_where(decoder);
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if (0 == ov_time_seek_page(&vf, seek_where)) {
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decoder_command_finished(decoder);
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} else
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decoder_seek_error(decoder);
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}
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int current_section;
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#ifdef HAVE_TREMOR
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long nbytes = ov_read(&vf, buffer, sizeof(buffer),
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IsBigEndian(), 2, 1,
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¤t_section);
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#else
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float **per_channel;
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long nframes = ov_read_float(&vf, &per_channel,
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frames_per_buffer,
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¤t_section);
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long nbytes = nframes;
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if (nframes > 0) {
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vorbis_interleave(buffer,
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(const float*const*)per_channel,
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nframes, audio_format.channels);
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nbytes *= frame_size;
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}
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#endif
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if (nbytes == OV_HOLE) /* bad packet */
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nbytes = 0;
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else if (nbytes <= 0)
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/* break on EOF or other error */
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break;
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if (current_section != prev_section) {
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vi = ov_info(&vf, -1);
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if (vi == nullptr) {
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LogWarning(vorbis_domain,
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"ov_info() has failed");
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break;
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}
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if (vi->rate != (long)audio_format.sample_rate ||
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vi->channels != (int)audio_format.channels) {
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/* we don't support audio format
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change yet */
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LogWarning(vorbis_domain,
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"audio format change, stopping here");
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break;
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}
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char **comments = ov_comment(&vf, -1)->user_comments;
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vorbis_send_comments(decoder, input_stream, comments);
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ReplayGainInfo rgi;
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if (vorbis_comments_to_replay_gain(rgi, comments))
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decoder_replay_gain(decoder, &rgi);
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prev_section = current_section;
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}
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long test = ov_bitrate_instant(&vf);
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if (test > 0)
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kbit_rate = test / 1000;
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cmd = decoder_data(decoder, input_stream,
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buffer, nbytes,
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kbit_rate);
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} while (cmd != DecoderCommand::STOP);
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ov_clear(&vf);
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}
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static bool
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vorbis_scan_stream(InputStream &is,
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const struct tag_handler *handler, void *handler_ctx)
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{
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struct vorbis_input_stream vis;
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OggVorbis_File vf;
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if (!vorbis_is_open(&vis, &vf, nullptr, is))
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return false;
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tag_handler_invoke_duration(handler, handler_ctx,
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(int)(ov_time_total(&vf, -1) + 0.5));
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vorbis_comments_scan(ov_comment(&vf, -1)->user_comments,
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handler, handler_ctx);
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ov_clear(&vf);
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return true;
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}
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static const char *const vorbis_suffixes[] = {
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"ogg", "oga", nullptr
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};
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static const char *const vorbis_mime_types[] = {
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"application/ogg",
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"application/x-ogg",
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"audio/ogg",
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"audio/vorbis",
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"audio/vorbis+ogg",
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"audio/x-ogg",
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"audio/x-vorbis",
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"audio/x-vorbis+ogg",
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nullptr
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};
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const struct DecoderPlugin vorbis_decoder_plugin = {
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"vorbis",
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nullptr,
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nullptr,
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vorbis_stream_decode,
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nullptr,
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nullptr,
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vorbis_scan_stream,
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nullptr,
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vorbis_suffixes,
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vorbis_mime_types
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};
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