decoder/audiofile: convert to C++
This commit is contained in:
Max Kellermann
264
src/decoder/AudiofileDecoderPlugin.cxx
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264
src/decoder/AudiofileDecoderPlugin.cxx
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/*
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* Copyright (C) 2003-2013 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 "AudiofileDecoderPlugin.hxx"
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#include "decoder_api.h"
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#include "audio_check.h"
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#include "tag_handler.h"
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#include <audiofile.h>
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#include <af_vfs.h>
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#include <assert.h>
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#include <glib.h>
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#include <stdio.h>
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#undef G_LOG_DOMAIN
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#define G_LOG_DOMAIN "audiofile"
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/* pick 1020 since its devisible for 8,16,24, and 32-bit audio */
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#define CHUNK_SIZE 1020
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static int audiofile_get_duration(const char *file)
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{
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int total_time;
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AFfilehandle af_fp = afOpenFile(file, "r", nullptr);
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if (af_fp == AF_NULL_FILEHANDLE) {
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return -1;
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}
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total_time = (int)
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((double)afGetFrameCount(af_fp, AF_DEFAULT_TRACK)
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/ afGetRate(af_fp, AF_DEFAULT_TRACK));
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afCloseFile(af_fp);
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return total_time;
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}
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static ssize_t
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audiofile_file_read(AFvirtualfile *vfile, void *data, size_t length)
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{
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struct input_stream *is = (struct input_stream *) vfile->closure;
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GError *error = nullptr;
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size_t nbytes;
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nbytes = input_stream_lock_read(is, data, length, &error);
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if (nbytes == 0 && error != nullptr) {
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g_warning("%s", error->message);
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g_error_free(error);
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return -1;
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}
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return nbytes;
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}
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static AFfileoffset
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audiofile_file_length(AFvirtualfile *vfile)
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{
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struct input_stream *is = (struct input_stream *) vfile->closure;
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return input_stream_get_size(is);
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}
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static AFfileoffset
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audiofile_file_tell(AFvirtualfile *vfile)
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{
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struct input_stream *is = (struct input_stream *) vfile->closure;
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return input_stream_get_offset(is);
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}
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static void
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audiofile_file_destroy(AFvirtualfile *vfile)
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{
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assert(vfile->closure != nullptr);
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vfile->closure = nullptr;
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}
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static AFfileoffset
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audiofile_file_seek(AFvirtualfile *vfile, AFfileoffset offset, int is_relative)
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{
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struct input_stream *is = (struct input_stream *) vfile->closure;
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int whence = (is_relative ? SEEK_CUR : SEEK_SET);
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if (input_stream_lock_seek(is, offset, whence, nullptr)) {
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return input_stream_get_offset(is);
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} else {
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return -1;
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}
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}
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static AFvirtualfile *
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setup_virtual_fops(struct input_stream *stream)
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{
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AFvirtualfile *vf = new AFvirtualfile();
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vf->closure = stream;
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vf->write = nullptr;
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vf->read = audiofile_file_read;
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vf->length = audiofile_file_length;
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vf->destroy = audiofile_file_destroy;
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vf->seek = audiofile_file_seek;
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vf->tell = audiofile_file_tell;
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return vf;
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}
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static enum sample_format
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audiofile_bits_to_sample_format(int bits)
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{
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switch (bits) {
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case 8:
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return SAMPLE_FORMAT_S8;
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case 16:
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return SAMPLE_FORMAT_S16;
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case 24:
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return SAMPLE_FORMAT_S24_P32;
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case 32:
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return SAMPLE_FORMAT_S32;
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}
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return SAMPLE_FORMAT_UNDEFINED;
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}
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static enum sample_format
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audiofile_setup_sample_format(AFfilehandle af_fp)
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{
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int fs, bits;
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afGetSampleFormat(af_fp, AF_DEFAULT_TRACK, &fs, &bits);
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if (!audio_valid_sample_format(audiofile_bits_to_sample_format(bits))) {
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g_debug("input file has %d bit samples, converting to 16",
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bits);
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bits = 16;
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}
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afSetVirtualSampleFormat(af_fp, AF_DEFAULT_TRACK,
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AF_SAMPFMT_TWOSCOMP, bits);
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afGetVirtualSampleFormat(af_fp, AF_DEFAULT_TRACK, &fs, &bits);
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return audiofile_bits_to_sample_format(bits);
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}
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static void
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audiofile_stream_decode(struct decoder *decoder, struct input_stream *is)
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{
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GError *error = nullptr;
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AFvirtualfile *vf;
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int fs, frame_count;
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AFfilehandle af_fp;
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struct audio_format audio_format;
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float total_time;
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uint16_t bit_rate;
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int ret;
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char chunk[CHUNK_SIZE];
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enum decoder_command cmd;
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if (!input_stream_is_seekable(is)) {
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g_warning("not seekable");
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return;
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}
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vf = setup_virtual_fops(is);
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af_fp = afOpenVirtualFile(vf, "r", nullptr);
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if (af_fp == AF_NULL_FILEHANDLE) {
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g_warning("failed to input stream\n");
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return;
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}
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if (!audio_format_init_checked(&audio_format,
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afGetRate(af_fp, AF_DEFAULT_TRACK),
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audiofile_setup_sample_format(af_fp),
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afGetVirtualChannels(af_fp, AF_DEFAULT_TRACK),
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&error)) {
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g_warning("%s", error->message);
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g_error_free(error);
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afCloseFile(af_fp);
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return;
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}
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frame_count = afGetFrameCount(af_fp, AF_DEFAULT_TRACK);
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total_time = ((float)frame_count / (float)audio_format.sample_rate);
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bit_rate = (uint16_t)(input_stream_get_size(is) * 8.0 / total_time / 1000.0 + 0.5);
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fs = (int)afGetVirtualFrameSize(af_fp, AF_DEFAULT_TRACK, 1);
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decoder_initialized(decoder, &audio_format, true, total_time);
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do {
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ret = afReadFrames(af_fp, AF_DEFAULT_TRACK, chunk,
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CHUNK_SIZE / fs);
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if (ret <= 0)
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break;
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cmd = decoder_data(decoder, nullptr,
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chunk, ret * fs,
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bit_rate);
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if (cmd == DECODE_COMMAND_SEEK) {
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AFframecount frame = decoder_seek_where(decoder) *
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audio_format.sample_rate;
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afSeekFrame(af_fp, AF_DEFAULT_TRACK, frame);
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decoder_command_finished(decoder);
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cmd = DECODE_COMMAND_NONE;
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}
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} while (cmd == DECODE_COMMAND_NONE);
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afCloseFile(af_fp);
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}
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static bool
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audiofile_scan_file(const char *file,
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const struct tag_handler *handler, void *handler_ctx)
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{
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int total_time = audiofile_get_duration(file);
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if (total_time < 0) {
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g_debug("Failed to get total song time from: %s\n",
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file);
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return false;
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}
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tag_handler_invoke_duration(handler, handler_ctx, total_time);
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return true;
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}
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static const char *const audiofile_suffixes[] = {
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"wav", "au", "aiff", "aif", nullptr
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};
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static const char *const audiofile_mime_types[] = {
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"audio/x-wav",
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"audio/x-aiff",
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nullptr
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};
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const struct decoder_plugin audiofile_decoder_plugin = {
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"audiofile",
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nullptr,
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nullptr,
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audiofile_stream_decode,
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nullptr,
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audiofile_scan_file,
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nullptr,
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nullptr,
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audiofile_suffixes,
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audiofile_mime_types,
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};
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