Vitor Sessak a écrit :
> On 07/15/2010 09:35 PM, Ronald S. Bultje wrote:
>> Hi,
>>
>> On Thu, Jul 15, 2010 at 3:12 PM, Sebastian Vater
>> <cdgs.basty-gM/[email protected]> wrote:
>>> Just a question for understanding...what's the advantage of using
>>> enum's
>>> then? The only one I see straight away is that there is less space
>>> required (saving 4 characters by replacing '#define ' with ' ').
>>
>> Documentation tools (e.g. doxy) will group them together and treat
>> them as a group of related properties, rather than separate entities.
>> That's a big one for a huge project such as FFmpeg, where in the
>> future many people will look at and modify your code, without
>> necessarily understanding everything at the beginning.
>
> Not to mention having variables of the type "enum Whatever" instead of
> a plain int, which tell immediately which kind of constants should be
> assigned to it.
Hi I have excellent news!
libavsequencer now flawlessly integrates into FFmpeg, just check out my
latest git. Please do a git pull --rebase, Stefano had problems without
using it.
Here are the module.[ch] part of the BSS to review.
This version compiles perfectly.
--
Best regards,
:-) Basty/CDGS (-:
diff --git a/libavsequencer/module.c b/libavsequencer/module.c
new file mode 100644
index 0000000..e9303a8
--- /dev/null
+++ b/libavsequencer/module.c
@@ -0,0 +1,72 @@
+/*
+ * Implement AVSequencer module stuff
+ * Copyright (c) 2010 Sebastian Vater <[email protected]>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * Implement AVSequencer module stuff.
+ */
+
+#include "libavutil/log.h"
+#include "libavsequencer/avsequencer.h"
+
+static const char *module_name(void *p)
+{
+ AVSequencerModule *module = p;
+ AVMetadataTag *tag = av_metadata_get(module->metadata, "title", NULL, AV_METADATA_IGNORE_SUFFIX);
+
+ return tag->value;
+}
+
+static const AVClass avseq_module_class = {
+ "AVSequencer Module",
+ module_name,
+ NULL,
+ LIBAVUTIL_VERSION_INT,
+};
+
+int avseq_module_open(AVSequencerContext *avctx, AVSequencerModule *module) {
+ AVSequencerModule **module_list;
+ uint16_t modules;
+
+ if (!avctx)
+ return AVERROR_INVALIDDATA;
+
+ module_list = avctx->module_list;
+ modules = avctx->modules;
+
+ if (!(module && ++modules)) {
+ return AVERROR_INVALIDDATA;
+ } else if (!(module_list = av_realloc(module_list, modules * sizeof(AVSequencerModule *)))) {
+ av_log(avctx, AV_LOG_ERROR, "cannot allocate module storage container.\n");
+ return AVERROR(ENOMEM);
+ }
+
+ module->av_class = &avseq_module_class;
+
+ if (!module->channels)
+ module->channels = 64;
+
+ module_list[modules] = module;
+ avctx->module_list = module_list;
+ avctx->modules = modules;
+
+ return 0;
+}
diff --git a/libavsequencer/module.h b/libavsequencer/module.h
new file mode 100755
index 0000000..abd9792
--- /dev/null
+++ b/libavsequencer/module.h
@@ -0,0 +1,108 @@
+/*
+ * AVSequencer music module management
+ * Copyright (c) 2010 Sebastian Vater <[email protected]>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVSEQUENCER_MODULE_H
+#define AVSEQUENCER_MODULE_H
+
+#include "libavutil/log.h"
+#include "libavformat/avformat.h"
+#include "libavsequencer/song.h"
+#include "libavsequencer/instr.h"
+
+/**
+ * Sequencer module structure.
+ * New fields can be added to the end with minor version bumps.
+ * Removal, reordering and changes to existing fields require a major
+ * version bump.
+ */
+typedef struct AVSequencerModule {
+ /**
+ * information on struct for av_log
+ * - set by avseq_alloc_context
+ */
+ const AVClass *av_class;
+
+ /** Metadata information: Original module file name, module name,
+ * module message, artist, genre, album, begin and finish date of
+ * composition and comment. */
+ AVMetadata *metadata;
+
+ /** Array (of size songs) of pointers containing every sub-song
+ for this module. */
+ AVSequencerSong **song_list;
+
+ /** Number of sub-songs attached to this module. */
+ uint16_t songs;
+
+ /** Array (of size instruments) of pointers containing every
+ instrument for this module. */
+ AVSequencerInstrument **instrument_list;
+
+ /** Number of instruments attached to this module. */
+ uint16_t instruments;
+
+ /** Array (of size envelopes) of pointers containing every
+ evelope for this module. */
+ AVSequencerEnvelope **envelope_list;
+
+ /** Number of envelopes attached to this module. */
+ uint16_t envelopes;
+
+ /** Array (of size keyboards) of pointers containing every
+ keyboard definition list for this module. */
+ AVSequencerKeyboard **keyboard_list;
+
+ /** Number of keyboard definitions attached to this module. */
+ uint16_t keyboards;
+
+ /** Array (of size arpeggios) of pointers containing every
+ arpeggio envelope definition list for this module. */
+ AVSequencerArpeggio **arpeggio_list;
+
+ /** Number of arpeggio definitions attached to this module. */
+ uint16_t arpeggios;
+
+ /** Forced duration of the module, in AV_TIME_BASE fractional
+ seconds. This is the total sum of all sub-song durations
+ this module contains or zero if the duration is unknown and
+ also cannot be automatically determined. The composer then can
+ set manually a duration after which the player can skip over to
+ the next module if it is playing back in once mode. */
+ uint64_t forced_duration;
+
+ /** Maximum number of virtual channels, including NNA (New Note
+ Action) background channels to be allocated and processed by
+ the mixing engine (defaults to 64). */
+ uint16_t channels;
+
+ /** Array of pointers containing every unknown data field where
+ the last element is indicated by a NULL pointer reference. The
+ first 64-bit of the unknown data contains an unique identifier
+ for this chunk and the second 64-bit data is actual unsigned
+ length of the following raw data. Some formats are chunk based
+ and can store information, which can't be handled by some
+ other, in case of a transition the unknown data is kept as is.
+ Some programs write editor settings for module in those chunks,
+ which then won't get lost in that case. */
+ uint8_t **unknown_data;
+} AVSequencerModule;
+
+#endif /* AVSEQUENCER_MODULE_H */
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