/* * Copyright (C) 2003-2009 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 "decoder_api.h" #include "decoder_internal.h" #include "decoder_control.h" #include "player_control.h" #include "audio.h" #include "song.h" #include "buffer.h" #include "normalize.h" #include "pipe.h" #include "chunk.h" #include <glib.h> #include <assert.h> #include <stdlib.h> #undef G_LOG_DOMAIN #define G_LOG_DOMAIN "decoder" void decoder_initialized(G_GNUC_UNUSED struct decoder * decoder, const struct audio_format *audio_format, bool seekable, float total_time) { assert(dc.state == DECODE_STATE_START); assert(dc.pipe != NULL); assert(decoder != NULL); assert(decoder->stream_tag == NULL); assert(decoder->decoder_tag == NULL); assert(!decoder->seeking); assert(audio_format != NULL); assert(audio_format_defined(audio_format)); assert(audio_format_valid(audio_format)); dc.in_audio_format = *audio_format; getOutputAudioFormat(audio_format, &dc.out_audio_format); dc.seekable = seekable; dc.total_time = total_time; dc.state = DECODE_STATE_DECODE; notify_signal(&pc.notify); g_debug("audio_format=%u:%u:%u, seekable=%s", dc.in_audio_format.sample_rate, dc.in_audio_format.bits, dc.in_audio_format.channels, seekable ? "true" : "false"); if (!audio_format_equals(&dc.in_audio_format, &dc.out_audio_format)) g_debug("converting to %u:%u:%u", dc.out_audio_format.sample_rate, dc.out_audio_format.bits, dc.out_audio_format.channels); } char *decoder_get_uri(G_GNUC_UNUSED struct decoder *decoder) { assert(dc.pipe != NULL); return song_get_uri(dc.current_song); } enum decoder_command decoder_get_command(G_GNUC_UNUSED struct decoder * decoder) { assert(dc.pipe != NULL); return dc.command; } void decoder_command_finished(G_GNUC_UNUSED struct decoder * decoder) { assert(dc.command != DECODE_COMMAND_NONE); assert(dc.command != DECODE_COMMAND_SEEK || dc.seek_error || decoder->seeking); assert(dc.pipe != NULL); if (dc.command == DECODE_COMMAND_SEEK) { /* delete frames from the old song position */ if (decoder->chunk != NULL) { music_buffer_return(dc.buffer, decoder->chunk); decoder->chunk = NULL; } music_pipe_clear(dc.pipe, dc.buffer); } dc.command = DECODE_COMMAND_NONE; notify_signal(&pc.notify); } double decoder_seek_where(G_GNUC_UNUSED struct decoder * decoder) { assert(dc.command == DECODE_COMMAND_SEEK); assert(dc.pipe != NULL); decoder->seeking = true; return dc.seek_where; } void decoder_seek_error(struct decoder * decoder) { assert(dc.command == DECODE_COMMAND_SEEK); assert(dc.pipe != NULL); dc.seek_error = true; decoder_command_finished(decoder); } size_t decoder_read(struct decoder *decoder, struct input_stream *is, void *buffer, size_t length) { size_t nbytes; assert(decoder == NULL || dc.state == DECODE_STATE_START || dc.state == DECODE_STATE_DECODE); assert(is != NULL); assert(buffer != NULL); if (length == 0) return 0; while (true) { /* XXX don't allow decoder==NULL */ if (decoder != NULL && /* ignore the SEEK command during initialization, the plugin should handle that after it has initialized successfully */ (dc.command != DECODE_COMMAND_SEEK || (dc.state != DECODE_STATE_START && !decoder->seeking)) && dc.command != DECODE_COMMAND_NONE) return 0; nbytes = input_stream_read(is, buffer, length); if (nbytes > 0 || input_stream_eof(is)) return nbytes; /* sleep for a fraction of a second! */ /* XXX don't sleep, wait for an event instead */ g_usleep(10000); } } /** * Sends a #tag as-is to the music pipe. Flushes the current chunk * (decoder.chunk) if there is one. */ static enum decoder_command do_send_tag(struct decoder *decoder, struct input_stream *is, const struct tag *tag) { struct music_chunk *chunk; if (decoder->chunk != NULL) { /* there is a partial chunk - flush it, we want the tag in a new chunk */ decoder_flush_chunk(decoder); notify_signal(&pc.notify); } assert(decoder->chunk == NULL); chunk = decoder_get_chunk(decoder, is); if (chunk == NULL) { assert(dc.command != DECODE_COMMAND_NONE); return dc.command; } chunk->tag = tag_dup(tag); return DECODE_COMMAND_NONE; } static bool update_stream_tag(struct decoder *decoder, struct input_stream *is) { struct tag *tag; tag = is != NULL ? input_stream_tag(is) : NULL; if (tag == NULL) { tag = decoder->song_tag; if (tag == NULL) return false; /* no stream tag present - submit the song tag instead */ decoder->song_tag = NULL; } if (decoder->stream_tag != NULL) tag_free(decoder->stream_tag); decoder->stream_tag = tag; return true; } enum decoder_command decoder_data(struct decoder *decoder, struct input_stream *is, const void *_data, size_t length, float data_time, uint16_t bitRate, struct replay_gain_info *replay_gain_info) { const char *data = _data; assert(dc.state == DECODE_STATE_DECODE); assert(dc.pipe != NULL); assert(length % audio_format_frame_size(&dc.in_audio_format) == 0); if (dc.command == DECODE_COMMAND_STOP || dc.command == DECODE_COMMAND_SEEK || length == 0) return dc.command; /* send stream tags */ if (update_stream_tag(decoder, is)) { enum decoder_command cmd; if (decoder->decoder_tag != NULL) { /* merge with tag from decoder plugin */ struct tag *tag; tag = tag_merge(decoder->stream_tag, decoder->decoder_tag); cmd = do_send_tag(decoder, is, tag); tag_free(tag); } else /* send only the stream tag */ cmd = do_send_tag(decoder, is, decoder->stream_tag); if (cmd != DECODE_COMMAND_NONE) return cmd; } if (!audio_format_equals(&dc.in_audio_format, &dc.out_audio_format)) { data = pcm_convert(&decoder->conv_state, &dc.in_audio_format, data, length, &dc.out_audio_format, &length); /* under certain circumstances, pcm_convert() may return an empty buffer - this condition should be investigated further, but for now, do this check as a workaround: */ if (data == NULL) return DECODE_COMMAND_NONE; } while (length > 0) { struct music_chunk *chunk; char *dest; size_t nbytes; bool full; chunk = decoder_get_chunk(decoder, is); if (chunk == NULL) { assert(dc.command != DECODE_COMMAND_NONE); return dc.command; } dest = music_chunk_write(chunk, &dc.out_audio_format, data_time, bitRate, &nbytes); if (dest == NULL) { /* the chunk is full, flush it */ decoder_flush_chunk(decoder); notify_signal(&pc.notify); continue; } assert(nbytes > 0); if (nbytes > length) nbytes = length; /* copy the buffer */ memcpy(dest, data, nbytes); /* apply replay gain or normalization */ if (replay_gain_mode != REPLAY_GAIN_OFF) replay_gain_apply(replay_gain_info, dest, nbytes, &dc.out_audio_format); else if (normalizationEnabled) normalizeData(dest, nbytes, &dc.out_audio_format); /* expand the music pipe chunk */ full = music_chunk_expand(chunk, &dc.out_audio_format, nbytes); if (full) { /* the chunk is full, flush it */ decoder_flush_chunk(decoder); notify_signal(&pc.notify); } data += nbytes; length -= nbytes; } return DECODE_COMMAND_NONE; } enum decoder_command decoder_tag(G_GNUC_UNUSED struct decoder *decoder, struct input_stream *is, const struct tag *tag) { enum decoder_command cmd; assert(dc.state == DECODE_STATE_DECODE); assert(dc.pipe != NULL); assert(tag != NULL); /* save the tag */ if (decoder->decoder_tag != NULL) tag_free(decoder->decoder_tag); decoder->decoder_tag = tag_dup(tag); /* check for a new stream tag */ update_stream_tag(decoder, is); /* send tag to music pipe */ if (decoder->stream_tag != NULL) { /* merge with tag from input stream */ struct tag *merged; merged = tag_merge(decoder->stream_tag, decoder->decoder_tag); cmd = do_send_tag(decoder, is, merged); tag_free(merged); } else /* send only the decoder tag */ cmd = do_send_tag(decoder, is, tag); return cmd; }