From 682f23e7bb4a52bedf46eff5c4859e1308eda124 Mon Sep 17 00:00:00 2001 From: Michał Cichoń Date: Tue, 25 Aug 2015 19:56:24 +0200 Subject: Update build ref --- libmad/src/decoder.c | 582 --------------------------------------------------- 1 file changed, 582 deletions(-) delete mode 100644 libmad/src/decoder.c (limited to 'libmad/src/decoder.c') diff --git a/libmad/src/decoder.c b/libmad/src/decoder.c deleted file mode 100644 index 6d6df0d..0000000 --- a/libmad/src/decoder.c +++ /dev/null @@ -1,582 +0,0 @@ -/* - * libmad - MPEG audio decoder library - * Copyright (C) 2000-2004 Underbit Technologies, Inc. - * - * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * - * $Id: decoder.c,v 1.22 2004/01/23 09:41:32 rob Exp $ - */ - -# ifdef HAVE_CONFIG_H -# include "config.h" -# endif - -# include "global.h" - -# ifdef HAVE_SYS_TYPES_H -# include -# endif - -# ifdef HAVE_SYS_WAIT_H -# include -# endif - -# ifdef HAVE_UNISTD_H -# include -# endif - -# ifdef HAVE_FCNTL_H -# include -# endif - -# include - -# ifdef HAVE_ERRNO_H -# include -# endif - -# include "stream.h" -# include "frame.h" -# include "synth.h" -# include "decoder.h" - -/* - * NAME: decoder->init() - * DESCRIPTION: initialize a decoder object with callback routines - */ -void mad_decoder_init(struct mad_decoder *decoder, void *data, - enum mad_flow (*input_func)(void *, - struct mad_stream *), - enum mad_flow (*header_func)(void *, - struct mad_header const *), - enum mad_flow (*filter_func)(void *, - struct mad_stream const *, - struct mad_frame *), - enum mad_flow (*output_func)(void *, - struct mad_header const *, - struct mad_pcm *), - enum mad_flow (*error_func)(void *, - struct mad_stream *, - struct mad_frame *), - enum mad_flow (*message_func)(void *, - void *, unsigned int *)) -{ - decoder->mode = -1; - - decoder->options = 0; - - decoder->async.pid = 0; - decoder->async.in = -1; - decoder->async.out = -1; - - decoder->sync = 0; - - decoder->cb_data = data; - - decoder->input_func = input_func; - decoder->header_func = header_func; - decoder->filter_func = filter_func; - decoder->output_func = output_func; - decoder->error_func = error_func; - decoder->message_func = message_func; -} - -int mad_decoder_finish(struct mad_decoder *decoder) -{ -# if defined(USE_ASYNC) - if (decoder->mode == MAD_DECODER_MODE_ASYNC && decoder->async.pid) { - pid_t pid; - int status; - - close(decoder->async.in); - - do - pid = waitpid(decoder->async.pid, &status, 0); - while (pid == -1 && errno == EINTR); - - decoder->mode = -1; - - close(decoder->async.out); - - decoder->async.pid = 0; - decoder->async.in = -1; - decoder->async.out = -1; - - if (pid == -1) - return -1; - - return (!WIFEXITED(status) || WEXITSTATUS(status)) ? -1 : 0; - } -# endif - - return 0; -} - -# if defined(USE_ASYNC) -static -enum mad_flow send_io(int fd, void const *data, size_t len) -{ - char const *ptr = data; - ssize_t count; - - while (len) { - do - count = write(fd, ptr, len); - while (count == -1 && errno == EINTR); - - if (count == -1) - return MAD_FLOW_BREAK; - - len -= count; - ptr += count; - } - - return MAD_FLOW_CONTINUE; -} - -static -enum mad_flow receive_io(int fd, void *buffer, size_t len) -{ - char *ptr = buffer; - ssize_t count; - - while (len) { - do - count = read(fd, ptr, len); - while (count == -1 && errno == EINTR); - - if (count == -1) - return (errno == EAGAIN) ? MAD_FLOW_IGNORE : MAD_FLOW_BREAK; - else if (count == 0) - return MAD_FLOW_STOP; - - len -= count; - ptr += count; - } - - return MAD_FLOW_CONTINUE; -} - -static -enum mad_flow receive_io_blocking(int fd, void *buffer, size_t len) -{ - int flags, blocking; - enum mad_flow result; - - flags = fcntl(fd, F_GETFL); - if (flags == -1) - return MAD_FLOW_BREAK; - - blocking = flags & ~O_NONBLOCK; - - if (blocking != flags && - fcntl(fd, F_SETFL, blocking) == -1) - return MAD_FLOW_BREAK; - - result = receive_io(fd, buffer, len); - - if (flags != blocking && - fcntl(fd, F_SETFL, flags) == -1) - return MAD_FLOW_BREAK; - - return result; -} - -static -enum mad_flow send(int fd, void const *message, unsigned int size) -{ - enum mad_flow result; - - /* send size */ - - result = send_io(fd, &size, sizeof(size)); - - /* send message */ - - if (result == MAD_FLOW_CONTINUE) - result = send_io(fd, message, size); - - return result; -} - -static -enum mad_flow receive(int fd, void **message, unsigned int *size) -{ - enum mad_flow result; - unsigned int actual; - - if (*message == 0) - *size = 0; - - /* receive size */ - - result = receive_io(fd, &actual, sizeof(actual)); - - /* receive message */ - - if (result == MAD_FLOW_CONTINUE) { - if (actual > *size) - actual -= *size; - else { - *size = actual; - actual = 0; - } - - if (*size > 0) { - if (*message == 0) { - *message = malloc(*size); - if (*message == 0) - return MAD_FLOW_BREAK; - } - - result = receive_io_blocking(fd, *message, *size); - } - - /* throw away remainder of message */ - - while (actual && result == MAD_FLOW_CONTINUE) { - char sink[256]; - unsigned int len; - - len = actual > sizeof(sink) ? sizeof(sink) : actual; - - result = receive_io_blocking(fd, sink, len); - - actual -= len; - } - } - - return result; -} - -static -enum mad_flow check_message(struct mad_decoder *decoder) -{ - enum mad_flow result; - void *message = 0; - unsigned int size; - - result = receive(decoder->async.in, &message, &size); - - if (result == MAD_FLOW_CONTINUE) { - if (decoder->message_func == 0) - size = 0; - else { - result = decoder->message_func(decoder->cb_data, message, &size); - - if (result == MAD_FLOW_IGNORE || - result == MAD_FLOW_BREAK) - size = 0; - } - - if (send(decoder->async.out, message, size) != MAD_FLOW_CONTINUE) - result = MAD_FLOW_BREAK; - } - - if (message) - free(message); - - return result; -} -# endif - -static -enum mad_flow error_default(void *data, struct mad_stream *stream, - struct mad_frame *frame) -{ - int *bad_last_frame = data; - - switch (stream->error) { - case MAD_ERROR_BADCRC: - if (*bad_last_frame) - mad_frame_mute(frame); - else - *bad_last_frame = 1; - - return MAD_FLOW_IGNORE; - - default: - return MAD_FLOW_CONTINUE; - } -} - -static -int run_sync(struct mad_decoder *decoder) -{ - enum mad_flow (*error_func)(void *, struct mad_stream *, struct mad_frame *); - void *error_data; - int bad_last_frame = 0; - struct mad_stream *stream; - struct mad_frame *frame; - struct mad_synth *synth; - int result = 0; - - if (decoder->input_func == 0) - return 0; - - if (decoder->error_func) { - error_func = decoder->error_func; - error_data = decoder->cb_data; - } - else { - error_func = error_default; - error_data = &bad_last_frame; - } - - stream = &decoder->sync->stream; - frame = &decoder->sync->frame; - synth = &decoder->sync->synth; - - mad_stream_init(stream); - mad_frame_init(frame); - mad_synth_init(synth); - - mad_stream_options(stream, decoder->options); - - do { - switch (decoder->input_func(decoder->cb_data, stream)) { - case MAD_FLOW_STOP: - goto done; - case MAD_FLOW_BREAK: - goto fail; - case MAD_FLOW_IGNORE: - continue; - case MAD_FLOW_CONTINUE: - break; - } - - while (1) { -# if defined(USE_ASYNC) - if (decoder->mode == MAD_DECODER_MODE_ASYNC) { - switch (check_message(decoder)) { - case MAD_FLOW_IGNORE: - case MAD_FLOW_CONTINUE: - break; - case MAD_FLOW_BREAK: - goto fail; - case MAD_FLOW_STOP: - goto done; - } - } -# endif - - if (decoder->header_func) { - if (mad_header_decode(&frame->header, stream) == -1) { - if (!MAD_RECOVERABLE(stream->error)) - break; - - switch (error_func(error_data, stream, frame)) { - case MAD_FLOW_STOP: - goto done; - case MAD_FLOW_BREAK: - goto fail; - case MAD_FLOW_IGNORE: - case MAD_FLOW_CONTINUE: - default: - continue; - } - } - - switch (decoder->header_func(decoder->cb_data, &frame->header)) { - case MAD_FLOW_STOP: - goto done; - case MAD_FLOW_BREAK: - goto fail; - case MAD_FLOW_IGNORE: - continue; - case MAD_FLOW_CONTINUE: - break; - } - } - - if (mad_frame_decode(frame, stream) == -1) { - if (!MAD_RECOVERABLE(stream->error)) - break; - - switch (error_func(error_data, stream, frame)) { - case MAD_FLOW_STOP: - goto done; - case MAD_FLOW_BREAK: - goto fail; - case MAD_FLOW_IGNORE: - break; - case MAD_FLOW_CONTINUE: - default: - continue; - } - } - else - bad_last_frame = 0; - - if (decoder->filter_func) { - switch (decoder->filter_func(decoder->cb_data, stream, frame)) { - case MAD_FLOW_STOP: - goto done; - case MAD_FLOW_BREAK: - goto fail; - case MAD_FLOW_IGNORE: - continue; - case MAD_FLOW_CONTINUE: - break; - } - } - - mad_synth_frame(synth, frame); - - if (decoder->output_func) { - switch (decoder->output_func(decoder->cb_data, - &frame->header, &synth->pcm)) { - case MAD_FLOW_STOP: - goto done; - case MAD_FLOW_BREAK: - goto fail; - case MAD_FLOW_IGNORE: - case MAD_FLOW_CONTINUE: - break; - } - } - } - } - while (stream->error == MAD_ERROR_BUFLEN); - - fail: - result = -1; - - done: - mad_synth_finish(synth); - mad_frame_finish(frame); - mad_stream_finish(stream); - - return result; -} - -# if defined(USE_ASYNC) -static -int run_async(struct mad_decoder *decoder) -{ - pid_t pid; - int ptoc[2], ctop[2], flags; - - if (pipe(ptoc) == -1) - return -1; - - if (pipe(ctop) == -1) { - close(ptoc[0]); - close(ptoc[1]); - return -1; - } - - flags = fcntl(ptoc[0], F_GETFL); - if (flags == -1 || - fcntl(ptoc[0], F_SETFL, flags | O_NONBLOCK) == -1) { - close(ctop[0]); - close(ctop[1]); - close(ptoc[0]); - close(ptoc[1]); - return -1; - } - - pid = fork(); - if (pid == -1) { - close(ctop[0]); - close(ctop[1]); - close(ptoc[0]); - close(ptoc[1]); - return -1; - } - - decoder->async.pid = pid; - - if (pid) { - /* parent */ - - close(ptoc[0]); - close(ctop[1]); - - decoder->async.in = ctop[0]; - decoder->async.out = ptoc[1]; - - return 0; - } - - /* child */ - - close(ptoc[1]); - close(ctop[0]); - - decoder->async.in = ptoc[0]; - decoder->async.out = ctop[1]; - - _exit(run_sync(decoder)); - - /* not reached */ - return -1; -} -# endif - -/* - * NAME: decoder->run() - * DESCRIPTION: run the decoder thread either synchronously or asynchronously - */ -int mad_decoder_run(struct mad_decoder *decoder, enum mad_decoder_mode mode) -{ - int result; - int (*run)(struct mad_decoder *) = 0; - - switch (decoder->mode = mode) { - case MAD_DECODER_MODE_SYNC: - run = run_sync; - break; - - case MAD_DECODER_MODE_ASYNC: -# if defined(USE_ASYNC) - run = run_async; -# endif - break; - } - - if (run == 0) - return -1; - - decoder->sync = malloc(sizeof(*decoder->sync)); - if (decoder->sync == 0) - return -1; - - result = run(decoder); - - free(decoder->sync); - decoder->sync = 0; - - return result; -} - -/* - * NAME: decoder->message() - * DESCRIPTION: send a message to and receive a reply from the decoder process - */ -int mad_decoder_message(struct mad_decoder *decoder, - void *message, unsigned int *len) -{ -# if defined(USE_ASYNC) - if (decoder->mode != MAD_DECODER_MODE_ASYNC || - send(decoder->async.out, message, *len) != MAD_FLOW_CONTINUE || - receive(decoder->async.in, &message, len) != MAD_FLOW_CONTINUE) - return -1; - - return 0; -# else - return -1; -# endif -} -- cgit v1.2.3