Encoder*: move to src/encoder
.. and move the plugins to src/encoder/plugins/.
This commit is contained in:
Max Kellermann
265
src/encoder/plugins/WaveEncoderPlugin.cxx
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265
src/encoder/plugins/WaveEncoderPlugin.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 "WaveEncoderPlugin.hxx"
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#include "../EncoderAPI.hxx"
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#include "system/ByteOrder.hxx"
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#include "util/Manual.hxx"
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#include "util/DynamicFifoBuffer.hxx"
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#include <assert.h>
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#include <string.h>
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struct WaveEncoder {
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Encoder encoder;
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unsigned bits;
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Manual<DynamicFifoBuffer<uint8_t>> buffer;
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WaveEncoder():encoder(wave_encoder_plugin) {}
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};
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struct wave_header {
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uint32_t id_riff;
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uint32_t riff_size;
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uint32_t id_wave;
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uint32_t id_fmt;
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uint32_t fmt_size;
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uint16_t format;
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uint16_t channels;
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uint32_t freq;
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uint32_t byterate;
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uint16_t blocksize;
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uint16_t bits;
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uint32_t id_data;
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uint32_t data_size;
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};
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static void
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fill_wave_header(struct wave_header *header, int channels, int bits,
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int freq, int block_size)
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{
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int data_size = 0x0FFFFFFF;
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/* constants */
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header->id_riff = ToLE32(0x46464952);
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header->id_wave = ToLE32(0x45564157);
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header->id_fmt = ToLE32(0x20746d66);
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header->id_data = ToLE32(0x61746164);
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/* wave format */
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header->format = ToLE16(1); // PCM_FORMAT
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header->channels = ToLE16(channels);
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header->bits = ToLE16(bits);
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header->freq = ToLE32(freq);
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header->blocksize = ToLE16(block_size);
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header->byterate = ToLE32(freq * block_size);
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/* chunk sizes (fake data length) */
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header->fmt_size = ToLE32(16);
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header->data_size = ToLE32(data_size);
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header->riff_size = ToLE32(4 + (8 + 16) + (8 + data_size));
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}
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static Encoder *
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wave_encoder_init(gcc_unused const config_param ¶m,
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gcc_unused Error &error)
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{
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WaveEncoder *encoder = new WaveEncoder();
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return &encoder->encoder;
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}
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static void
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wave_encoder_finish(Encoder *_encoder)
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{
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WaveEncoder *encoder = (WaveEncoder *)_encoder;
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delete encoder;
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}
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static bool
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wave_encoder_open(Encoder *_encoder,
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AudioFormat &audio_format,
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gcc_unused Error &error)
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{
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WaveEncoder *encoder = (WaveEncoder *)_encoder;
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assert(audio_format.IsValid());
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switch (audio_format.format) {
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case SampleFormat::S8:
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encoder->bits = 8;
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break;
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case SampleFormat::S16:
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encoder->bits = 16;
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break;
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case SampleFormat::S24_P32:
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encoder->bits = 24;
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break;
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case SampleFormat::S32:
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encoder->bits = 32;
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break;
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default:
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audio_format.format = SampleFormat::S16;
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encoder->bits = 16;
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break;
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}
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encoder->buffer.Construct(8192);
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auto range = encoder->buffer->Write();
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assert(range.size >= sizeof(wave_header));
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wave_header *header = (wave_header *)range.data;
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/* create PCM wave header in initial buffer */
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fill_wave_header(header,
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audio_format.channels,
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encoder->bits,
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audio_format.sample_rate,
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(encoder->bits / 8) * audio_format.channels);
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encoder->buffer->Append(sizeof(*header));
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return true;
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}
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static void
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wave_encoder_close(Encoder *_encoder)
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{
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WaveEncoder *encoder = (WaveEncoder *)_encoder;
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encoder->buffer.Destruct();
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}
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static size_t
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pcm16_to_wave(uint16_t *dst16, const uint16_t *src16, size_t length)
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{
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size_t cnt = length >> 1;
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while (cnt > 0) {
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*dst16++ = ToLE16(*src16++);
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cnt--;
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}
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return length;
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}
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static size_t
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pcm32_to_wave(uint32_t *dst32, const uint32_t *src32, size_t length)
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{
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size_t cnt = length >> 2;
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while (cnt > 0){
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*dst32++ = ToLE32(*src32++);
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cnt--;
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}
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return length;
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}
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static size_t
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pcm24_to_wave(uint8_t *dst8, const uint32_t *src32, size_t length)
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{
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uint32_t value;
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uint8_t *dst_old = dst8;
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length = length >> 2;
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while (length > 0){
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value = *src32++;
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*dst8++ = (value) & 0xFF;
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*dst8++ = (value >> 8) & 0xFF;
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*dst8++ = (value >> 16) & 0xFF;
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length--;
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}
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//correct buffer length
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return (dst8 - dst_old);
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}
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static bool
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wave_encoder_write(Encoder *_encoder,
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const void *src, size_t length,
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gcc_unused Error &error)
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{
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WaveEncoder *encoder = (WaveEncoder *)_encoder;
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uint8_t *dst = encoder->buffer->Write(length);
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if (IsLittleEndian()) {
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switch (encoder->bits) {
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case 8:
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case 16:
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case 32:// optimized cases
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memcpy(dst, src, length);
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break;
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case 24:
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length = pcm24_to_wave(dst, (const uint32_t *)src, length);
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break;
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}
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} else {
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switch (encoder->bits) {
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case 8:
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memcpy(dst, src, length);
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break;
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case 16:
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length = pcm16_to_wave((uint16_t *)dst,
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(const uint16_t *)src, length);
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break;
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case 24:
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length = pcm24_to_wave(dst, (const uint32_t *)src, length);
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break;
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case 32:
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length = pcm32_to_wave((uint32_t *)dst,
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(const uint32_t *)src, length);
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break;
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}
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}
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encoder->buffer->Append(length);
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return true;
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}
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static size_t
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wave_encoder_read(Encoder *_encoder, void *dest, size_t length)
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{
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WaveEncoder *encoder = (WaveEncoder *)_encoder;
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return encoder->buffer->Read((uint8_t *)dest, length);
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}
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static const char *
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wave_encoder_get_mime_type(gcc_unused Encoder *_encoder)
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{
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return "audio/wav";
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}
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const EncoderPlugin wave_encoder_plugin = {
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"wave",
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wave_encoder_init,
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wave_encoder_finish,
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wave_encoder_open,
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wave_encoder_close,
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nullptr,
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nullptr,
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nullptr,
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nullptr,
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wave_encoder_write,
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wave_encoder_read,
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wave_encoder_get_mime_type,
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};
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