decoder_*: convert to C++
This commit is contained in:
Max Kellermann
569
src/DecoderAPI.cxx
Normal file
569
src/DecoderAPI.cxx
Normal file
@@ -0,0 +1,569 @@
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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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extern "C" {
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#include "decoder_api.h"
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#include "audio_config.h"
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#include "buffer.h"
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#include "pipe.h"
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#include "chunk.h"
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#include "replay_gain_config.h"
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}
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#include "DecoderControl.hxx"
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#include "DecoderInternal.hxx"
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#include "song.h"
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#include <glib.h>
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#include <assert.h>
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#include <stdlib.h>
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#undef G_LOG_DOMAIN
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#define G_LOG_DOMAIN "decoder"
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void
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decoder_initialized(struct decoder *decoder,
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const struct audio_format *audio_format,
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bool seekable, float total_time)
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{
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struct decoder_control *dc = decoder->dc;
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struct audio_format_string af_string;
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assert(dc->state == DECODE_STATE_START);
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assert(dc->pipe != NULL);
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assert(decoder != NULL);
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assert(decoder->stream_tag == NULL);
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assert(decoder->decoder_tag == NULL);
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assert(!decoder->seeking);
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assert(audio_format != NULL);
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assert(audio_format_defined(audio_format));
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assert(audio_format_valid(audio_format));
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dc->in_audio_format = *audio_format;
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getOutputAudioFormat(audio_format, &dc->out_audio_format);
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dc->seekable = seekable;
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dc->total_time = total_time;
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decoder_lock(dc);
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dc->state = DECODE_STATE_DECODE;
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g_cond_signal(dc->client_cond);
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decoder_unlock(dc);
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g_debug("audio_format=%s, seekable=%s",
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audio_format_to_string(&dc->in_audio_format, &af_string),
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seekable ? "true" : "false");
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if (!audio_format_equals(&dc->in_audio_format,
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&dc->out_audio_format))
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g_debug("converting to %s",
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audio_format_to_string(&dc->out_audio_format,
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&af_string));
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}
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/**
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* Checks if we need an "initial seek". If so, then the initial seek
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* is prepared, and the function returns true.
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*/
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G_GNUC_PURE
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static bool
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decoder_prepare_initial_seek(struct decoder *decoder)
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{
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const struct decoder_control *dc = decoder->dc;
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assert(dc->pipe != NULL);
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if (dc->state != DECODE_STATE_DECODE)
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/* wait until the decoder has finished initialisation
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(reading file headers etc.) before emitting the
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virtual "SEEK" command */
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return false;
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if (decoder->initial_seek_running)
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/* initial seek has already begun - override any other
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command */
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return true;
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if (decoder->initial_seek_pending) {
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if (!dc->seekable) {
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/* seeking is not possible */
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decoder->initial_seek_pending = false;
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return false;
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}
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if (dc->command == DECODE_COMMAND_NONE) {
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/* begin initial seek */
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decoder->initial_seek_pending = false;
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decoder->initial_seek_running = true;
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return true;
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}
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/* skip initial seek when there's another command
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(e.g. STOP) */
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decoder->initial_seek_pending = false;
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}
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return false;
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}
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/**
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* Returns the current decoder command. May return a "virtual"
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* synthesized command, e.g. to seek to the beginning of the CUE
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* track.
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*/
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G_GNUC_PURE
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static enum decoder_command
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decoder_get_virtual_command(struct decoder *decoder)
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{
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const struct decoder_control *dc = decoder->dc;
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assert(dc->pipe != NULL);
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if (decoder_prepare_initial_seek(decoder))
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return DECODE_COMMAND_SEEK;
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return dc->command;
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}
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enum decoder_command
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decoder_get_command(struct decoder *decoder)
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{
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return decoder_get_virtual_command(decoder);
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}
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void
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decoder_command_finished(struct decoder *decoder)
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{
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struct decoder_control *dc = decoder->dc;
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decoder_lock(dc);
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assert(dc->command != DECODE_COMMAND_NONE ||
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decoder->initial_seek_running);
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assert(dc->command != DECODE_COMMAND_SEEK ||
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decoder->initial_seek_running ||
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dc->seek_error || decoder->seeking);
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assert(dc->pipe != NULL);
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if (decoder->initial_seek_running) {
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assert(!decoder->seeking);
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assert(decoder->chunk == NULL);
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assert(music_pipe_empty(dc->pipe));
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decoder->initial_seek_running = false;
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decoder->timestamp = dc->start_ms / 1000.;
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decoder_unlock(dc);
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return;
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}
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if (decoder->seeking) {
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decoder->seeking = false;
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/* delete frames from the old song position */
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if (decoder->chunk != NULL) {
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music_buffer_return(dc->buffer, decoder->chunk);
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decoder->chunk = NULL;
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}
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music_pipe_clear(dc->pipe, dc->buffer);
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decoder->timestamp = dc->seek_where;
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}
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dc->command = DECODE_COMMAND_NONE;
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g_cond_signal(dc->client_cond);
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decoder_unlock(dc);
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}
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double decoder_seek_where(G_GNUC_UNUSED struct decoder * decoder)
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{
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const struct decoder_control *dc = decoder->dc;
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assert(dc->pipe != NULL);
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if (decoder->initial_seek_running)
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return dc->start_ms / 1000.;
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assert(dc->command == DECODE_COMMAND_SEEK);
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decoder->seeking = true;
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return dc->seek_where;
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}
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void decoder_seek_error(struct decoder * decoder)
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{
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struct decoder_control *dc = decoder->dc;
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assert(dc->pipe != NULL);
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if (decoder->initial_seek_running) {
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/* d'oh, we can't seek to the sub-song start position,
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what now? - no idea, ignoring the problem for now. */
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decoder->initial_seek_running = false;
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return;
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}
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assert(dc->command == DECODE_COMMAND_SEEK);
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dc->seek_error = true;
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decoder->seeking = false;
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decoder_command_finished(decoder);
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}
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/**
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* Should be read operation be cancelled? That is the case when the
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* player thread has sent a command such as "STOP".
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*/
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G_GNUC_PURE
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static inline bool
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decoder_check_cancel_read(const struct decoder *decoder)
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{
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if (decoder == NULL)
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return false;
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const struct decoder_control *dc = decoder->dc;
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if (dc->command == DECODE_COMMAND_NONE)
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return false;
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/* ignore the SEEK command during initialization, the plugin
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should handle that after it has initialized successfully */
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if (dc->command == DECODE_COMMAND_SEEK &&
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(dc->state == DECODE_STATE_START || decoder->seeking))
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return false;
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return true;
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}
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size_t decoder_read(struct decoder *decoder,
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struct input_stream *is,
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void *buffer, size_t length)
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{
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/* XXX don't allow decoder==NULL */
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GError *error = NULL;
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size_t nbytes;
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assert(decoder == NULL ||
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decoder->dc->state == DECODE_STATE_START ||
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decoder->dc->state == DECODE_STATE_DECODE);
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assert(is != NULL);
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assert(buffer != NULL);
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if (length == 0)
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return 0;
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input_stream_lock(is);
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while (true) {
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if (decoder_check_cancel_read(decoder)) {
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input_stream_unlock(is);
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return 0;
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}
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if (input_stream_available(is))
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break;
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g_cond_wait(is->cond, is->mutex);
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}
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nbytes = input_stream_read(is, buffer, length, &error);
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assert(nbytes == 0 || error == NULL);
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assert(nbytes > 0 || error != NULL || input_stream_eof(is));
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if (G_UNLIKELY(nbytes == 0 && error != NULL)) {
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g_warning("%s", error->message);
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g_error_free(error);
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}
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input_stream_unlock(is);
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return nbytes;
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}
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void
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decoder_timestamp(struct decoder *decoder, double t)
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{
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assert(decoder != NULL);
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assert(t >= 0);
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decoder->timestamp = t;
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}
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/**
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* Sends a #tag as-is to the music pipe. Flushes the current chunk
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* (decoder.chunk) if there is one.
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*/
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static enum decoder_command
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do_send_tag(struct decoder *decoder, const struct tag *tag)
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{
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struct music_chunk *chunk;
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if (decoder->chunk != NULL) {
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/* there is a partial chunk - flush it, we want the
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tag in a new chunk */
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decoder_flush_chunk(decoder);
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g_cond_signal(decoder->dc->client_cond);
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}
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assert(decoder->chunk == NULL);
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chunk = decoder_get_chunk(decoder);
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if (chunk == NULL) {
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assert(decoder->dc->command != DECODE_COMMAND_NONE);
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return decoder->dc->command;
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}
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chunk->tag = tag_dup(tag);
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return DECODE_COMMAND_NONE;
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}
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static bool
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update_stream_tag(struct decoder *decoder, struct input_stream *is)
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{
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struct tag *tag;
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tag = is != NULL
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? input_stream_lock_tag(is)
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: NULL;
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if (tag == NULL) {
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tag = decoder->song_tag;
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if (tag == NULL)
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return false;
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/* no stream tag present - submit the song tag
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instead */
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decoder->song_tag = NULL;
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}
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if (decoder->stream_tag != NULL)
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tag_free(decoder->stream_tag);
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decoder->stream_tag = tag;
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return true;
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}
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enum decoder_command
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decoder_data(struct decoder *decoder,
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struct input_stream *is,
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const void *data, size_t length,
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uint16_t kbit_rate)
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{
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struct decoder_control *dc = decoder->dc;
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GError *error = NULL;
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enum decoder_command cmd;
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assert(dc->state == DECODE_STATE_DECODE);
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assert(dc->pipe != NULL);
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assert(length % audio_format_frame_size(&dc->in_audio_format) == 0);
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decoder_lock(dc);
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cmd = decoder_get_virtual_command(decoder);
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decoder_unlock(dc);
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if (cmd == DECODE_COMMAND_STOP || cmd == DECODE_COMMAND_SEEK ||
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length == 0)
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return cmd;
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/* send stream tags */
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if (update_stream_tag(decoder, is)) {
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if (decoder->decoder_tag != NULL) {
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/* merge with tag from decoder plugin */
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struct tag *tag;
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tag = tag_merge(decoder->decoder_tag,
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decoder->stream_tag);
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cmd = do_send_tag(decoder, tag);
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tag_free(tag);
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} else
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/* send only the stream tag */
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cmd = do_send_tag(decoder, decoder->stream_tag);
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if (cmd != DECODE_COMMAND_NONE)
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return cmd;
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}
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if (!audio_format_equals(&dc->in_audio_format, &dc->out_audio_format)) {
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data = pcm_convert(&decoder->conv_state,
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&dc->in_audio_format, data, length,
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&dc->out_audio_format, &length,
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&error);
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if (data == NULL) {
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/* the PCM conversion has failed - stop
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playback, since we have no better way to
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bail out */
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g_warning("%s", error->message);
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return DECODE_COMMAND_STOP;
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}
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}
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while (length > 0) {
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struct music_chunk *chunk;
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size_t nbytes;
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bool full;
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chunk = decoder_get_chunk(decoder);
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if (chunk == NULL) {
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assert(dc->command != DECODE_COMMAND_NONE);
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return dc->command;
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}
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void *dest = music_chunk_write(chunk, &dc->out_audio_format,
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decoder->timestamp -
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dc->song->start_ms / 1000.0,
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kbit_rate, &nbytes);
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if (dest == NULL) {
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/* the chunk is full, flush it */
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decoder_flush_chunk(decoder);
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g_cond_signal(dc->client_cond);
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continue;
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}
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assert(nbytes > 0);
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if (nbytes > length)
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nbytes = length;
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/* copy the buffer */
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memcpy(dest, data, nbytes);
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/* expand the music pipe chunk */
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full = music_chunk_expand(chunk, &dc->out_audio_format, nbytes);
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if (full) {
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/* the chunk is full, flush it */
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decoder_flush_chunk(decoder);
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g_cond_signal(dc->client_cond);
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}
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data = (const uint8_t *)data + nbytes;
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length -= nbytes;
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decoder->timestamp += (double)nbytes /
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audio_format_time_to_size(&dc->out_audio_format);
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if (dc->end_ms > 0 &&
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decoder->timestamp >= dc->end_ms / 1000.0)
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/* the end of this range has been reached:
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stop decoding */
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return DECODE_COMMAND_STOP;
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}
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return DECODE_COMMAND_NONE;
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}
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enum decoder_command
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decoder_tag(G_GNUC_UNUSED struct decoder *decoder, struct input_stream *is,
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const struct tag *tag)
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{
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G_GNUC_UNUSED const struct decoder_control *dc = decoder->dc;
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enum decoder_command cmd;
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assert(dc->state == DECODE_STATE_DECODE);
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assert(dc->pipe != NULL);
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assert(tag != NULL);
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/* save the tag */
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if (decoder->decoder_tag != NULL)
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tag_free(decoder->decoder_tag);
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decoder->decoder_tag = tag_dup(tag);
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/* check for a new stream tag */
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update_stream_tag(decoder, is);
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/* check if we're seeking */
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if (decoder_prepare_initial_seek(decoder))
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/* during initial seek, no music chunk must be created
|
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until seeking is finished; skip the rest of the
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function here */
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return DECODE_COMMAND_SEEK;
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/* send tag to music pipe */
|
||||
|
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if (decoder->stream_tag != NULL) {
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/* merge with tag from input stream */
|
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struct tag *merged;
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merged = tag_merge(decoder->stream_tag, decoder->decoder_tag);
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cmd = do_send_tag(decoder, merged);
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tag_free(merged);
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} else
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/* send only the decoder tag */
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cmd = do_send_tag(decoder, tag);
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return cmd;
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}
|
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|
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float
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||||
decoder_replay_gain(struct decoder *decoder,
|
||||
const struct replay_gain_info *replay_gain_info)
|
||||
{
|
||||
float return_db = 0;
|
||||
assert(decoder != NULL);
|
||||
|
||||
if (replay_gain_info != NULL) {
|
||||
static unsigned serial;
|
||||
if (++serial == 0)
|
||||
serial = 1;
|
||||
|
||||
if (REPLAY_GAIN_OFF != replay_gain_mode) {
|
||||
return_db = 20.0 * log10f(
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replay_gain_tuple_scale(
|
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&replay_gain_info->tuples[replay_gain_get_real_mode()],
|
||||
replay_gain_preamp, replay_gain_missing_preamp,
|
||||
replay_gain_limit));
|
||||
}
|
||||
|
||||
decoder->replay_gain_info = *replay_gain_info;
|
||||
decoder->replay_gain_serial = serial;
|
||||
|
||||
if (decoder->chunk != NULL) {
|
||||
/* flush the current chunk because the new
|
||||
replay gain values affect the following
|
||||
samples */
|
||||
decoder_flush_chunk(decoder);
|
||||
g_cond_signal(decoder->dc->client_cond);
|
||||
}
|
||||
} else
|
||||
decoder->replay_gain_serial = 0;
|
||||
|
||||
return return_db;
|
||||
}
|
||||
|
||||
void
|
||||
decoder_mixramp(struct decoder *decoder, float replay_gain_db,
|
||||
char *mixramp_start, char *mixramp_end)
|
||||
{
|
||||
assert(decoder != NULL);
|
||||
struct decoder_control *dc = decoder->dc;
|
||||
assert(dc != NULL);
|
||||
|
||||
dc->replay_gain_db = replay_gain_db;
|
||||
dc_mixramp_start(dc, mixramp_start);
|
||||
dc_mixramp_end(dc, mixramp_end);
|
||||
}
|
||||
Reference in New Issue
Block a user