renamed decoder plugin "mp4" to "mp4ff"

This plugin is based on "libmp4ff".

1 files changed, 420 insertions, 0 deletions

diff --git a/src/decoder/mp4ff_plugin.c b/src/decoder/mp4ff_plugin.c
new file mode 100644
index 000000000..3d5a022a0
--- /dev/null
+++ b/src/decoder/mp4ff_plugin.c
@@ -0,0 +1,420 @@
+/* the Music Player Daemon (MPD)
+ * Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
+ * This project's homepage is: 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include "../decoder_api.h"
+#include "config.h"
+
+#include "mp4ff.h"
+
+#include <limits.h>
+#include <faad.h>
+#include <glib.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+/* all code here is either based on or copied from FAAD2's frontend code */
+
+struct mp4_context {
+	struct decoder *decoder;
+	struct input_stream *input_stream;
+};
+
+static int
+mp4_get_aac_track(mp4ff_t * infile)
+{
+	/* find AAC track */
+	int i, rc;
+	int num_tracks = mp4ff_total_tracks(infile);
+
+	for (i = 0; i < num_tracks; i++) {
+		unsigned char *buff = NULL;
+		unsigned int buff_size = 0;
+#ifdef HAVE_MP4AUDIOSPECIFICCONFIG
+		mp4AudioSpecificConfig mp4ASC;
+#else
+		unsigned long dummy1_32;
+		unsigned char dummy2_8, dummy3_8, dummy4_8, dummy5_8, dummy6_8,
+		    dummy7_8, dummy8_8;
+#endif
+
+		mp4ff_get_decoder_config(infile, i, &buff, &buff_size);
+
+		if (buff) {
+#ifdef HAVE_MP4AUDIOSPECIFICCONFIG
+			rc = AudioSpecificConfig(buff, buff_size, &mp4ASC);
+#else
+			rc = AudioSpecificConfig(buff, &dummy1_32, &dummy2_8,
+						 &dummy3_8, &dummy4_8,
+						 &dummy5_8, &dummy6_8,
+						 &dummy7_8, &dummy8_8);
+#endif
+			free(buff);
+			if (rc < 0)
+				continue;
+			return i;
+		}
+	}
+
+	/* can't decode this */
+	return -1;
+}
+
+static uint32_t
+mp4_read(void *user_data, void *buffer, uint32_t length)
+{
+	struct mp4_context *ctx = user_data;
+
+	return decoder_read(ctx->decoder, ctx->input_stream, buffer, length);
+}
+
+static uint32_t
+mp4_seek(void *user_data, uint64_t position)
+{
+	struct mp4_context *ctx = user_data;
+
+	return input_stream_seek(ctx->input_stream, position, SEEK_SET)
+		? 0 : -1;
+}
+
+static void
+mp4_decode(struct decoder *mpd_decoder, struct input_stream *input_stream)
+{
+	struct mp4_context ctx = {
+		.decoder = mpd_decoder,
+		.input_stream = input_stream,
+	};
+	mp4ff_callback_t callback = {
+		.read = mp4_read,
+		.seek = mp4_seek,
+		.user_data = &ctx,
+	};
+	mp4ff_t *mp4fh;
+	int32_t track;
+	float file_time, total_time;
+	int32_t scale;
+	faacDecHandle decoder;
+	faacDecFrameInfo frame_info;
+	faacDecConfigurationPtr config;
+	unsigned char *mp4_buffer;
+	unsigned int mp4_buffer_size;
+	uint32_t sample_rate;
+#ifdef HAVE_FAAD_LONG
+	/* neaacdec.h declares all arguments as "unsigned long", but
+	   internally expects uint32_t pointers.  To avoid gcc
+	   warnings, use this workaround. */
+	unsigned long *sample_rate_r = (unsigned long*)&sample_rate;
+#else
+	uint32_t *sample_rate_r = &sample_rate;
+#endif
+	unsigned char channels;
+	long sample_id;
+	long num_samples;
+	long dur;
+	unsigned int sample_count;
+	char *sample_buffer;
+	size_t sample_buffer_length;
+	unsigned int initial = 1;
+	float *seek_table;
+	long seek_table_end = -1;
+	bool seek_position_found = false;
+	long offset;
+	uint16_t bit_rate = 0;
+	bool seeking = false;
+	double seek_where = 0;
+	bool initialized = false;
+	enum decoder_command cmd = DECODE_COMMAND_NONE;
+
+	mp4fh = mp4ff_open_read(&callback);
+	if (!mp4fh) {
+		g_warning("Input does not appear to be a mp4 stream.\n");
+		return;
+	}
+
+	track = mp4_get_aac_track(mp4fh);
+	if (track < 0) {
+		g_warning("No AAC track found in mp4 stream.\n");
+		mp4ff_close(mp4fh);
+		return;
+	}
+
+	decoder = faacDecOpen();
+
+	config = faacDecGetCurrentConfiguration(decoder);
+	config->outputFormat = FAAD_FMT_16BIT;
+#ifdef HAVE_FAACDECCONFIGURATION_DOWNMATRIX
+	config->downMatrix = 1;
+#endif
+#ifdef HAVE_FAACDECCONFIGURATION_DONTUPSAMPLEIMPLICITSBR
+	config->dontUpSampleImplicitSBR = 0;
+#endif
+	faacDecSetConfiguration(decoder, config);
+
+	mp4_buffer = NULL;
+	mp4_buffer_size = 0;
+	mp4ff_get_decoder_config(mp4fh, track, &mp4_buffer, &mp4_buffer_size);
+
+	if (faacDecInit2(decoder, mp4_buffer, mp4_buffer_size,
+			 sample_rate_r, &channels) < 0) {
+		g_warning("Not an AAC stream.\n");
+		faacDecClose(decoder);
+		mp4ff_close(mp4fh);
+		return;
+	}
+
+	file_time = mp4ff_get_track_duration_use_offsets(mp4fh, track);
+	scale = mp4ff_time_scale(mp4fh, track);
+
+	free(mp4_buffer);
+
+	if (scale < 0) {
+		g_warning("Error getting audio format of mp4 AAC track.\n");
+		faacDecClose(decoder);
+		mp4ff_close(mp4fh);
+		return;
+	}
+	total_time = ((float)file_time) / scale;
+
+	num_samples = mp4ff_num_samples(mp4fh, track);
+	if (num_samples > (long)(INT_MAX / sizeof(float))) {
+		 g_warning("Integer overflow.\n");
+		 faacDecClose(decoder);
+		 mp4ff_close(mp4fh);
+		 return;
+	}
+
+	file_time = 0.0;
+
+	seek_table = g_malloc(sizeof(float) * num_samples);
+
+	for (sample_id = 0;
+	     sample_id < num_samples && cmd != DECODE_COMMAND_STOP;
+	     sample_id++) {
+		if (cmd == DECODE_COMMAND_SEEK) {
+			seeking = true;
+			seek_where = decoder_seek_where(mpd_decoder);
+		}
+
+		if (seeking && seek_table_end > 1 &&
+		    seek_table[seek_table_end] >= seek_where) {
+			int i = 2;
+			while (seek_table[i] < seek_where)
+				i++;
+			sample_id = i - 1;
+			file_time = seek_table[sample_id];
+		}
+
+		dur = mp4ff_get_sample_duration(mp4fh, track, sample_id);
+		offset = mp4ff_get_sample_offset(mp4fh, track, sample_id);
+
+		if (sample_id > seek_table_end) {
+			seek_table[sample_id] = file_time;
+			seek_table_end = sample_id;
+		}
+
+		if (sample_id == 0)
+			dur = 0;
+		if (offset > dur)
+			dur = 0;
+		else
+			dur -= offset;
+		file_time += ((float)dur) / scale;
+
+		if (seeking && file_time > seek_where)
+			seek_position_found = true;
+
+		if (seeking && seek_position_found) {
+			seek_position_found = false;
+			seeking = 0;
+			decoder_command_finished(mpd_decoder);
+		}
+
+		if (seeking)
+			continue;
+
+		if (mp4ff_read_sample(mp4fh, track, sample_id, &mp4_buffer,
+				      &mp4_buffer_size) == 0)
+			break;
+
+#ifdef HAVE_FAAD_BUFLEN_FUNCS
+		sample_buffer = faacDecDecode(decoder, &frame_info, mp4_buffer,
+					      mp4_buffer_size);
+#else
+		sample_buffer = faacDecDecode(decoder, &frame_info, mp4_buffer);
+#endif
+
+		if (mp4_buffer)
+			free(mp4_buffer);
+		if (frame_info.error > 0) {
+			g_warning("faad2 error: %s\n",
+				  faacDecGetErrorMessage(frame_info.error));
+			break;
+		}
+
+		if (!initialized) {
+			struct audio_format audio_format = {
+				.bits = 16,
+				.channels = frame_info.channels,
+			};
+
+			channels = frame_info.channels;
+#ifdef HAVE_FAACDECFRAMEINFO_SAMPLERATE
+			scale = frame_info.samplerate;
+#endif
+			audio_format.sample_rate = scale;
+
+			if (!audio_format_valid(&audio_format)) {
+				g_warning("Invalid audio format: %u:%u:%u\n",
+					  audio_format.sample_rate,
+					  audio_format.bits,
+					  audio_format.channels);
+				break;
+			}
+
+			decoder_initialized(mpd_decoder, &audio_format,
+					    input_stream->seekable,
+					    total_time);
+			initialized = true;
+		}
+
+		if (channels * (unsigned long)(dur + offset) > frame_info.samples) {
+			dur = frame_info.samples / channels;
+			offset = 0;
+		}
+
+		sample_count = (unsigned long)(dur * channels);
+
+		if (sample_count > 0) {
+			initial = 0;
+			bit_rate = frame_info.bytesconsumed * 8.0 *
+			    frame_info.channels * scale /
+			    frame_info.samples / 1000 + 0.5;
+		}
+
+		sample_buffer_length = sample_count * 2;
+
+		sample_buffer += offset * channels * 2;
+
+		cmd = decoder_data(mpd_decoder, input_stream,
+				   sample_buffer, sample_buffer_length,
+				   file_time, bit_rate, NULL);
+	}
+
+	g_free(seek_table);
+	faacDecClose(decoder);
+	mp4ff_close(mp4fh);
+}
+
+static struct tag *
+mp4_load_tag(const char *file)
+{
+	struct tag *ret = NULL;
+	struct input_stream input_stream;
+	struct mp4_context ctx = {
+		.decoder = NULL,
+		.input_stream = &input_stream,
+	};
+	mp4ff_callback_t callback = {
+		.read = mp4_read,
+		.seek = mp4_seek,
+		.user_data = &ctx,
+	};
+	mp4ff_t *mp4fh;
+	int32_t track;
+	int32_t file_time;
+	int32_t scale;
+	int i;
+
+	if (!input_stream_open(&input_stream, file)) {
+		g_warning("mp4_load_tag: Failed to open file: %s\n", file);
+		return NULL;
+	}
+
+	mp4fh = mp4ff_open_read(&callback);
+	if (!mp4fh) {
+		input_stream_close(&input_stream);
+		return NULL;
+	}
+
+	track = mp4_get_aac_track(mp4fh);
+	if (track < 0) {
+		mp4ff_close(mp4fh);
+		input_stream_close(&input_stream);
+		return NULL;
+	}
+
+	ret = tag_new();
+	file_time = mp4ff_get_track_duration_use_offsets(mp4fh, track);
+	scale = mp4ff_time_scale(mp4fh, track);
+	if (scale < 0) {
+		mp4ff_close(mp4fh);
+		input_stream_close(&input_stream);
+		tag_free(ret);
+		return NULL;
+	}
+	ret->time = ((float)file_time) / scale + 0.5;
+
+	for (i = 0; i < mp4ff_meta_get_num_items(mp4fh); i++) {
+		char *item;
+		char *value;
+
+		mp4ff_meta_get_by_index(mp4fh, i, &item, &value);
+
+		if (0 == strcasecmp("artist", item)) {
+			tag_add_item(ret, TAG_ITEM_ARTIST, value);
+		} else if (0 == strcasecmp("title", item)) {
+			tag_add_item(ret, TAG_ITEM_TITLE, value);
+		} else if (0 == strcasecmp("album", item)) {
+			tag_add_item(ret, TAG_ITEM_ALBUM, value);
+		} else if (0 == strcasecmp("track", item)) {
+			tag_add_item(ret, TAG_ITEM_TRACK, value);
+		} else if (0 == strcasecmp("disc", item)) {	/* Is that the correct id? */
+			tag_add_item(ret, TAG_ITEM_DISC, value);
+		} else if (0 == strcasecmp("genre", item)) {
+			tag_add_item(ret, TAG_ITEM_GENRE, value);
+		} else if (0 == strcasecmp("date", item)) {
+			tag_add_item(ret, TAG_ITEM_DATE, value);
+		} else if (0 == strcasecmp("writer", item)) {
+			tag_add_item(ret, TAG_ITEM_COMPOSER, value);
+		}
+
+		free(item);
+		free(value);
+	}
+
+	mp4ff_close(mp4fh);
+	input_stream_close(&input_stream);
+
+	return ret;
+}
+
+static struct tag *
+mp4_tag_dup(const char *file)
+{
+	return mp4_load_tag(file);
+}
+
+static const char *const mp4_suffixes[] = { "m4a", "mp4", NULL };
+static const char *const mp4_mime_types[] = { "audio/mp4", "audio/m4a", NULL };
+
+const struct decoder_plugin mp4ff_decoder_plugin = {
+	.name = "mp4",
+	.stream_decode = mp4_decode,
+	.tag_dup = mp4_tag_dup,
+	.suffixes = mp4_suffixes,
+	.mime_types = mp4_mime_types,
+};