From a1a97d663ed9d2c251bc852248d5fe30861e4560 Mon Sep 17 00:00:00 2001 From: Max Kellermann Date: Mon, 29 Jul 2013 08:04:34 +0200 Subject: encoder/flac: convert to C++ --- src/encoder/flac_encoder.c | 342 --------------------------------------------- 1 file changed, 342 deletions(-) delete mode 100644 src/encoder/flac_encoder.c (limited to 'src/encoder/flac_encoder.c') diff --git a/src/encoder/flac_encoder.c b/src/encoder/flac_encoder.c deleted file mode 100644 index 060d63318..000000000 --- a/src/encoder/flac_encoder.c +++ /dev/null @@ -1,342 +0,0 @@ -/* - * Copyright (C) 2003-2011 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. - */ - -#include "config.h" -#include "encoder_api.h" -#include "encoder_plugin.h" -#include "audio_format.h" -#include "pcm/pcm_buffer.h" -#include "util/fifo_buffer.h" -#include "util/growing_fifo.h" - -#include -#include - -#include - -#if !defined(FLAC_API_VERSION_CURRENT) || FLAC_API_VERSION_CURRENT <= 7 -#error libFLAC is too old -#endif - -struct flac_encoder { - struct encoder encoder; - - struct audio_format audio_format; - unsigned compression; - - FLAC__StreamEncoder *fse; - - struct pcm_buffer expand_buffer; - - /** - * This buffer will hold encoded data from libFLAC until it is - * picked up with flac_encoder_read(). - */ - struct fifo_buffer *output_buffer; -}; - -extern const struct encoder_plugin flac_encoder_plugin; - - -static inline GQuark -flac_encoder_quark(void) -{ - return g_quark_from_static_string("flac_encoder"); -} - -static bool -flac_encoder_configure(struct flac_encoder *encoder, - const struct config_param *param, G_GNUC_UNUSED GError **error) -{ - encoder->compression = config_get_block_unsigned(param, - "compression", 5); - - return true; -} - -static struct encoder * -flac_encoder_init(const struct config_param *param, GError **error) -{ - struct flac_encoder *encoder; - - encoder = g_new(struct flac_encoder, 1); - encoder_struct_init(&encoder->encoder, &flac_encoder_plugin); - - /* load configuration from "param" */ - if (!flac_encoder_configure(encoder, param, error)) { - /* configuration has failed, roll back and return error */ - g_free(encoder); - return NULL; - } - - return &encoder->encoder; -} - -static void -flac_encoder_finish(struct encoder *_encoder) -{ - struct flac_encoder *encoder = (struct flac_encoder *)_encoder; - - /* the real libFLAC cleanup was already performed by - flac_encoder_close(), so no real work here */ - g_free(encoder); -} - -static bool -flac_encoder_setup(struct flac_encoder *encoder, unsigned bits_per_sample, - GError **error) -{ - if ( !FLAC__stream_encoder_set_compression_level(encoder->fse, - encoder->compression)) { - g_set_error(error, flac_encoder_quark(), 0, - "error setting flac compression to %d", - encoder->compression); - return false; - } - - if ( !FLAC__stream_encoder_set_channels(encoder->fse, - encoder->audio_format.channels)) { - g_set_error(error, flac_encoder_quark(), 0, - "error setting flac channels num to %d", - encoder->audio_format.channels); - return false; - } - if ( !FLAC__stream_encoder_set_bits_per_sample(encoder->fse, - bits_per_sample)) { - g_set_error(error, flac_encoder_quark(), 0, - "error setting flac bit format to %d", - bits_per_sample); - return false; - } - if ( !FLAC__stream_encoder_set_sample_rate(encoder->fse, - encoder->audio_format.sample_rate)) { - g_set_error(error, flac_encoder_quark(), 0, - "error setting flac sample rate to %d", - encoder->audio_format.sample_rate); - return false; - } - return true; -} - -static FLAC__StreamEncoderWriteStatus -flac_write_callback(G_GNUC_UNUSED const FLAC__StreamEncoder *fse, - const FLAC__byte data[], - size_t bytes, - G_GNUC_UNUSED unsigned samples, - G_GNUC_UNUSED unsigned current_frame, void *client_data) -{ - struct flac_encoder *encoder = (struct flac_encoder *) client_data; - - //transfer data to buffer - growing_fifo_append(&encoder->output_buffer, data, bytes); - - return FLAC__STREAM_ENCODER_WRITE_STATUS_OK; -} - -static void -flac_encoder_close(struct encoder *_encoder) -{ - struct flac_encoder *encoder = (struct flac_encoder *)_encoder; - - FLAC__stream_encoder_delete(encoder->fse); - - pcm_buffer_deinit(&encoder->expand_buffer); - fifo_buffer_free(encoder->output_buffer); -} - -static bool -flac_encoder_open(struct encoder *_encoder, struct audio_format *audio_format, - GError **error) -{ - struct flac_encoder *encoder = (struct flac_encoder *)_encoder; - unsigned bits_per_sample; - - encoder->audio_format = *audio_format; - - /* FIXME: flac should support 32bit as well */ - switch (audio_format->format) { - case SAMPLE_FORMAT_S8: - bits_per_sample = 8; - break; - - case SAMPLE_FORMAT_S16: - bits_per_sample = 16; - break; - - case SAMPLE_FORMAT_S24_P32: - bits_per_sample = 24; - break; - - default: - bits_per_sample = 24; - audio_format->format = SAMPLE_FORMAT_S24_P32; - } - - /* allocate the encoder */ - encoder->fse = FLAC__stream_encoder_new(); - if (encoder->fse == NULL) { - g_set_error(error, flac_encoder_quark(), 0, - "flac_new() failed"); - return false; - } - - if (!flac_encoder_setup(encoder, bits_per_sample, error)) { - FLAC__stream_encoder_delete(encoder->fse); - return false; - } - - pcm_buffer_init(&encoder->expand_buffer); - - encoder->output_buffer = growing_fifo_new(); - - /* this immediately outputs data through callback */ - - { - FLAC__StreamEncoderInitStatus init_status; - - init_status = FLAC__stream_encoder_init_stream(encoder->fse, - flac_write_callback, - NULL, NULL, NULL, encoder); - - if(init_status != FLAC__STREAM_ENCODER_INIT_STATUS_OK) { - g_set_error(error, flac_encoder_quark(), 0, - "failed to initialize encoder: %s\n", - FLAC__StreamEncoderInitStatusString[init_status]); - flac_encoder_close(_encoder); - return false; - } - } - - return true; -} - - -static bool -flac_encoder_flush(struct encoder *_encoder, G_GNUC_UNUSED GError **error) -{ - struct flac_encoder *encoder = (struct flac_encoder *)_encoder; - - (void) FLAC__stream_encoder_finish(encoder->fse); - return true; -} - -static inline void -pcm8_to_flac(int32_t *out, const int8_t *in, unsigned num_samples) -{ - while (num_samples > 0) { - *out++ = *in++; - --num_samples; - } -} - -static inline void -pcm16_to_flac(int32_t *out, const int16_t *in, unsigned num_samples) -{ - while (num_samples > 0) { - *out++ = *in++; - --num_samples; - } -} - -static bool -flac_encoder_write(struct encoder *_encoder, - const void *data, size_t length, - G_GNUC_UNUSED GError **error) -{ - struct flac_encoder *encoder = (struct flac_encoder *)_encoder; - unsigned num_frames, num_samples; - void *exbuffer; - const void *buffer = NULL; - - /* format conversion */ - - num_frames = length / audio_format_frame_size(&encoder->audio_format); - num_samples = num_frames * encoder->audio_format.channels; - - switch (encoder->audio_format.format) { - case SAMPLE_FORMAT_S8: - exbuffer = pcm_buffer_get(&encoder->expand_buffer, length*4); - pcm8_to_flac(exbuffer, data, num_samples); - buffer = exbuffer; - break; - - case SAMPLE_FORMAT_S16: - exbuffer = pcm_buffer_get(&encoder->expand_buffer, length*2); - pcm16_to_flac(exbuffer, data, num_samples); - buffer = exbuffer; - break; - - case SAMPLE_FORMAT_S24_P32: - case SAMPLE_FORMAT_S32: - /* nothing need to be done; format is the same for - both mpd and libFLAC */ - buffer = data; - break; - } - - /* feed samples to encoder */ - - if (!FLAC__stream_encoder_process_interleaved(encoder->fse, buffer, - num_frames)) { - g_set_error(error, flac_encoder_quark(), 0, - "flac encoder process failed"); - return false; - } - - return true; -} - -static size_t -flac_encoder_read(struct encoder *_encoder, void *dest, size_t length) -{ - struct flac_encoder *encoder = (struct flac_encoder *)_encoder; - - size_t max_length; - const char *src = fifo_buffer_read(encoder->output_buffer, - &max_length); - if (src == NULL) - return 0; - - if (length > max_length) - length = max_length; - - memcpy(dest, src, length); - fifo_buffer_consume(encoder->output_buffer, length); - return length; -} - -static const char * -flac_encoder_get_mime_type(G_GNUC_UNUSED struct encoder *_encoder) -{ - return "audio/flac"; -} - -const struct encoder_plugin flac_encoder_plugin = { - .name = "flac", - .init = flac_encoder_init, - .finish = flac_encoder_finish, - .open = flac_encoder_open, - .close = flac_encoder_close, - .end = flac_encoder_flush, - .flush = flac_encoder_flush, - .write = flac_encoder_write, - .read = flac_encoder_read, - .get_mime_type = flac_encoder_get_mime_type, -}; - -- cgit v1.2.3