From e12cc01aa4b25798a2887ac6c5e01309e744ea8b Mon Sep 17 00:00:00 2001 From: Max Kellermann Date: Fri, 4 Jan 2013 08:41:16 +0100 Subject: decoder_*: convert to C++ --- src/DecoderAPI.cxx | 569 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 569 insertions(+) create mode 100644 src/DecoderAPI.cxx (limited to 'src/DecoderAPI.cxx') diff --git a/src/DecoderAPI.cxx b/src/DecoderAPI.cxx new file mode 100644 index 000000000..738e71842 --- /dev/null +++ b/src/DecoderAPI.cxx @@ -0,0 +1,569 @@ +/* + * Copyright (C) 2003-2013 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" + +extern "C" { +#include "decoder_api.h" +#include "audio_config.h" +#include "buffer.h" +#include "pipe.h" +#include "chunk.h" +#include "replay_gain_config.h" +} + +#include "DecoderControl.hxx" +#include "DecoderInternal.hxx" +#include "song.h" + +#include + +#include +#include + +#undef G_LOG_DOMAIN +#define G_LOG_DOMAIN "decoder" + +void +decoder_initialized(struct decoder *decoder, + const struct audio_format *audio_format, + bool seekable, float total_time) +{ + struct decoder_control *dc = decoder->dc; + struct audio_format_string af_string; + + 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; + + decoder_lock(dc); + dc->state = DECODE_STATE_DECODE; + g_cond_signal(dc->client_cond); + decoder_unlock(dc); + + g_debug("audio_format=%s, seekable=%s", + audio_format_to_string(&dc->in_audio_format, &af_string), + seekable ? "true" : "false"); + + if (!audio_format_equals(&dc->in_audio_format, + &dc->out_audio_format)) + g_debug("converting to %s", + audio_format_to_string(&dc->out_audio_format, + &af_string)); +} + +/** + * Checks if we need an "initial seek". If so, then the initial seek + * is prepared, and the function returns true. + */ +G_GNUC_PURE +static bool +decoder_prepare_initial_seek(struct decoder *decoder) +{ + const struct decoder_control *dc = decoder->dc; + assert(dc->pipe != NULL); + + if (dc->state != DECODE_STATE_DECODE) + /* wait until the decoder has finished initialisation + (reading file headers etc.) before emitting the + virtual "SEEK" command */ + return false; + + if (decoder->initial_seek_running) + /* initial seek has already begun - override any other + command */ + return true; + + if (decoder->initial_seek_pending) { + if (!dc->seekable) { + /* seeking is not possible */ + decoder->initial_seek_pending = false; + return false; + } + + if (dc->command == DECODE_COMMAND_NONE) { + /* begin initial seek */ + + decoder->initial_seek_pending = false; + decoder->initial_seek_running = true; + return true; + } + + /* skip initial seek when there's another command + (e.g. STOP) */ + + decoder->initial_seek_pending = false; + } + + return false; +} + +/** + * Returns the current decoder command. May return a "virtual" + * synthesized command, e.g. to seek to the beginning of the CUE + * track. + */ +G_GNUC_PURE +static enum decoder_command +decoder_get_virtual_command(struct decoder *decoder) +{ + const struct decoder_control *dc = decoder->dc; + assert(dc->pipe != NULL); + + if (decoder_prepare_initial_seek(decoder)) + return DECODE_COMMAND_SEEK; + + return dc->command; +} + +enum decoder_command +decoder_get_command(struct decoder *decoder) +{ + return decoder_get_virtual_command(decoder); +} + +void +decoder_command_finished(struct decoder *decoder) +{ + struct decoder_control *dc = decoder->dc; + + decoder_lock(dc); + + assert(dc->command != DECODE_COMMAND_NONE || + decoder->initial_seek_running); + assert(dc->command != DECODE_COMMAND_SEEK || + decoder->initial_seek_running || + dc->seek_error || decoder->seeking); + assert(dc->pipe != NULL); + + if (decoder->initial_seek_running) { + assert(!decoder->seeking); + assert(decoder->chunk == NULL); + assert(music_pipe_empty(dc->pipe)); + + decoder->initial_seek_running = false; + decoder->timestamp = dc->start_ms / 1000.; + decoder_unlock(dc); + return; + } + + if (decoder->seeking) { + decoder->seeking = false; + + /* 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); + + decoder->timestamp = dc->seek_where; + } + + dc->command = DECODE_COMMAND_NONE; + g_cond_signal(dc->client_cond); + decoder_unlock(dc); +} + +double decoder_seek_where(G_GNUC_UNUSED struct decoder * decoder) +{ + const struct decoder_control *dc = decoder->dc; + + assert(dc->pipe != NULL); + + if (decoder->initial_seek_running) + return dc->start_ms / 1000.; + + assert(dc->command == DECODE_COMMAND_SEEK); + + decoder->seeking = true; + + return dc->seek_where; +} + +void decoder_seek_error(struct decoder * decoder) +{ + struct decoder_control *dc = decoder->dc; + + assert(dc->pipe != NULL); + + if (decoder->initial_seek_running) { + /* d'oh, we can't seek to the sub-song start position, + what now? - no idea, ignoring the problem for now. */ + decoder->initial_seek_running = false; + return; + } + + assert(dc->command == DECODE_COMMAND_SEEK); + + dc->seek_error = true; + decoder->seeking = false; + + decoder_command_finished(decoder); +} + +/** + * Should be read operation be cancelled? That is the case when the + * player thread has sent a command such as "STOP". + */ +G_GNUC_PURE +static inline bool +decoder_check_cancel_read(const struct decoder *decoder) +{ + if (decoder == NULL) + return false; + + const struct decoder_control *dc = decoder->dc; + if (dc->command == DECODE_COMMAND_NONE) + return false; + + /* ignore the SEEK command during initialization, the plugin + should handle that after it has initialized successfully */ + if (dc->command == DECODE_COMMAND_SEEK && + (dc->state == DECODE_STATE_START || decoder->seeking)) + return false; + + return true; +} + +size_t decoder_read(struct decoder *decoder, + struct input_stream *is, + void *buffer, size_t length) +{ + /* XXX don't allow decoder==NULL */ + GError *error = NULL; + size_t nbytes; + + assert(decoder == NULL || + decoder->dc->state == DECODE_STATE_START || + decoder->dc->state == DECODE_STATE_DECODE); + assert(is != NULL); + assert(buffer != NULL); + + if (length == 0) + return 0; + + input_stream_lock(is); + + while (true) { + if (decoder_check_cancel_read(decoder)) { + input_stream_unlock(is); + return 0; + } + + if (input_stream_available(is)) + break; + + g_cond_wait(is->cond, is->mutex); + } + + nbytes = input_stream_read(is, buffer, length, &error); + assert(nbytes == 0 || error == NULL); + assert(nbytes > 0 || error != NULL || input_stream_eof(is)); + + if (G_UNLIKELY(nbytes == 0 && error != NULL)) { + g_warning("%s", error->message); + g_error_free(error); + } + + input_stream_unlock(is); + + return nbytes; +} + +void +decoder_timestamp(struct decoder *decoder, double t) +{ + assert(decoder != NULL); + assert(t >= 0); + + decoder->timestamp = t; +} + +/** + * 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, 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); + g_cond_signal(decoder->dc->client_cond); + } + + assert(decoder->chunk == NULL); + + chunk = decoder_get_chunk(decoder); + if (chunk == NULL) { + assert(decoder->dc->command != DECODE_COMMAND_NONE); + return decoder->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_lock_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, + uint16_t kbit_rate) +{ + struct decoder_control *dc = decoder->dc; + GError *error = NULL; + enum decoder_command cmd; + + assert(dc->state == DECODE_STATE_DECODE); + assert(dc->pipe != NULL); + assert(length % audio_format_frame_size(&dc->in_audio_format) == 0); + + decoder_lock(dc); + cmd = decoder_get_virtual_command(decoder); + decoder_unlock(dc); + + if (cmd == DECODE_COMMAND_STOP || cmd == DECODE_COMMAND_SEEK || + length == 0) + return cmd; + + /* send stream tags */ + + if (update_stream_tag(decoder, is)) { + if (decoder->decoder_tag != NULL) { + /* merge with tag from decoder plugin */ + struct tag *tag; + + tag = tag_merge(decoder->decoder_tag, + decoder->stream_tag); + cmd = do_send_tag(decoder, tag); + tag_free(tag); + } else + /* send only the stream tag */ + cmd = do_send_tag(decoder, 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, + &error); + if (data == NULL) { + /* the PCM conversion has failed - stop + playback, since we have no better way to + bail out */ + g_warning("%s", error->message); + return DECODE_COMMAND_STOP; + } + } + + while (length > 0) { + struct music_chunk *chunk; + size_t nbytes; + bool full; + + chunk = decoder_get_chunk(decoder); + if (chunk == NULL) { + assert(dc->command != DECODE_COMMAND_NONE); + return dc->command; + } + + void *dest = music_chunk_write(chunk, &dc->out_audio_format, + decoder->timestamp - + dc->song->start_ms / 1000.0, + kbit_rate, &nbytes); + if (dest == NULL) { + /* the chunk is full, flush it */ + decoder_flush_chunk(decoder); + g_cond_signal(dc->client_cond); + continue; + } + + assert(nbytes > 0); + + if (nbytes > length) + nbytes = length; + + /* copy the buffer */ + + memcpy(dest, data, nbytes); + + /* 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); + g_cond_signal(dc->client_cond); + } + + data = (const uint8_t *)data + nbytes; + length -= nbytes; + + decoder->timestamp += (double)nbytes / + audio_format_time_to_size(&dc->out_audio_format); + + if (dc->end_ms > 0 && + decoder->timestamp >= dc->end_ms / 1000.0) + /* the end of this range has been reached: + stop decoding */ + return DECODE_COMMAND_STOP; + } + + return DECODE_COMMAND_NONE; +} + +enum decoder_command +decoder_tag(G_GNUC_UNUSED struct decoder *decoder, struct input_stream *is, + const struct tag *tag) +{ + G_GNUC_UNUSED const struct decoder_control *dc = decoder->dc; + 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); + + /* check if we're seeking */ + + if (decoder_prepare_initial_seek(decoder)) + /* during initial seek, no music chunk must be created + until seeking is finished; skip the rest of the + function here */ + return DECODE_COMMAND_SEEK; + + /* 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, merged); + tag_free(merged); + } else + /* send only the decoder tag */ + cmd = do_send_tag(decoder, tag); + + return cmd; +} + +float +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( + replay_gain_tuple_scale( + &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); +} -- cgit v1.2.3